Patent Application
20230111758
This application claims under 35 U.S.C. §119(a) the benefit of priority from Korean Patent Application No. 10-2021-0134641 filed on Oct. 12, 2021, the entire contents of which are incorporated herein by reference.
The present disclosure relates to a bush-type mount for a vehicle. More particularly, it relates to a bush-type mount for a vehicle that has an improved structure enabling adjustment of the properties thereof along three axes with a high degree of adjustment freedom so as to, for example, increase the axial property thereof to the level of the radial property thereof.
In general, a powertrain of a vehicle, which includes an engine and a transmission, is supported by a plurality of mounts so as to be mounted to the vehicle body. Also, a motor for driving an electric vehicle is supported by a plurality of mounts, which function to distribute a load and to control the behavior of the vehicle, so as to be mounted to the vehicle body.
Various types of mounts designed to improve the noise, vibration and harshness (NVH) performance of a vehicle may be used. A bush-type mount is used as one example of such a mount.
Referring to
The outer pipe 12 is press-fitted into a separate bracket formed in a vehicle body, such as a sub-frame, and the inner pipe 16 is bolted to bosses formed in parts such as an engine and a transmission or parts such as a motor and a speed reducer. Alternatively, the outer pipe is press-fitted into a housing of the motor or the speed reducer, and the inner pipe is bolted to a bracket or a boss formed in the vehicle body. Thereby, the bush-type mount 10 functions to isolate and dampen vibrations.
In this case, the radial property (e.g. stiffness) of the bush-type mount 10 may be determined based on the extent to which the rubber part 14 is expanded or compressed when the distance between the outer pipe 12 and the inner pipe 16 increases or decreases due to vibrations.
Accordingly, the radial property (e.g. stiffness) of the bush-type mount 10 may be determined based on the hardness of the rubber part 14, which refers to the amount of external force that the rubber material constituting the rubber part 14 is capable of withstanding, and the amount and shape of the rubber constituting the rubber part 14. Also, the radial property (e.g. stiffness) of the bush-type mount 10 may be adjusted by varying the hardness, thickness, and shape of the rubber part 14, which are influenced by the inner diameter of the outer pipe 12 and the outer diameter of the inner pipe 16.
Since the rubber part 14 is disposed between the outer pipe 12 and the inner pipe 16 to interconnect the same, the axial property of the bush-type mount 10 may be determined based on the amount of shear deformation of the rubber part 14 caused by a load in the axial direction. Because the resistance to shear deformation of the rubber part 14 caused by a load in the axial direction is not greater than the resistance to compressive or tensile deformation, the axial property of the bush-type mount is set to be lower than the radial property thereof.
The above-described conventional bush-type mounts are mounted to a frame of a vehicle body and power electronic (PE) parts (e.g. a motor and a speed reducer) of an electric vehicle in a three-point support structure.
For example, as shown in
In this case, the outer pipes of the bush-type mounts 10 are press-fitted into the brackets 20 in the lateral direction (width direction) of the vehicle, the brackets 20 are mounted to a PE part 30, and the inner pipes of the bush-type mounts 10 are bolted to a frame 40 of the vehicle body.
Since the three bush-type mounts 10 are press-fitted into the brackets 20 in the lateral direction of the vehicle, the axial directions of the three bush-type mounts 10 are parallel to the lateral direction of the vehicle.
Alternatively, in order to improve ease of assembly and to reduce production costs and weight, as shown in
In this case, as shown in
However, when mounting the above-described conventional bush-type mounts to the frame of the vehicle body and the power electronic (PE) parts (e.g. the motor and the speed reducer) of the electric vehicle in a three-point support structure, it is not possible to set the properties of the entire mount system in all directions to desired levels, thus failing to appropriately respond to impacts and aftershock and accordingly deteriorating driving performance.
In other words, because there is a limitation to the extent to which the property of the conventional bush-type mount in each direction is capable of being set, if the arrangement of the conventional bush-type mounts changes for reasons of, for example, reducing production costs and weight and thus the properties of the entire mount system in all directions are not set to desired levels, it is difficult to appropriately respond to impacts and aftershock, leading to deterioration in driving performance.
For example, as described above with reference to
The above information disclosed in this Background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the related art that is already known in this country to a person of ordinary skill in the art.
The present invention has been made in an effort to solve the above-described problems associated with the related art, and it is an object of the present invention to provide a bush-type mount for a vehicle that has a high degree of freedom of setting of the properties thereof along three axes so as to increase the property thereof in the axial direction (the longitudinal direction of the vehicle) to the level of the property thereof in the radial direction (the vertical direction and the lateral direction of the vehicle) or to increase both the property thereof in the axial direction and the property thereof in the radial direction, thereby sufficiently securing the properties of an entire mount system in all directions irrespective of the direction in which the bush-type mount is disposed.
According to first to fifth embodiments of the present invention for accomplishing the above and other objects, a bush-type mount for a vehicle may include an outer pipe fitted into a press-fit hole formed in a frame of a vehicle body in the longitudinal direction of the vehicle, an inner pipe having a bolt hole formed therein so as to be mounted to a PE part, the inner pipe being disposed inside the outer pipe so as to be oriented in the longitudinal direction, a rubber part formed in a vulcanization-molding process so as to fill the space between the outer pipe and the inner pipe, at least two supports integrally formed at the front end and the rear end of the outer pipe so as to be in close contact with the front surface and the rear surface of the rubber part, and a bulge part integrally formed with the outer circumferential portion of the inner pipe to compress or expand the rubber part in the same direction as the direction of movement of the inner pipe, the inner pipe being mounted so as to move in the longitudinal direction.
According to the first embodiment of the present invention, the at least two supports may include a front-left support and a front-right support integrally formed with the front end of the outer pipe at left and right positions so as to be in close contact with the front surface of the rubber part to support the rubber part together with the bulge part so as to compress and expand the rubber part, and may further include a rear-upper support and a rear-lower support integrally formed with the rear end of the outer pipe at upper and lower positions so as to be in close contact with the rear surface of the rubber part to support the rubber part together with the bulge part so as to compress and expand the rubber part.
According to the first embodiment of the present invention, the bulge part may include a left bulge plate and a right bulge plate protruding leftwards and rightwards from the outer circumference of a lengthwise middle portion of the inner pipe so as to be embedded into the rubber part, the left bulge plate and the right bulge plate being disposed so as to be aligned with the front-left support and the front-right support in the longitudinal direction, and may further include an upper bulge plate and a lower bulge plate protruding upwards and downwards from the outer circumference of a lengthwise middle portion of the inner pipe so as to be embedded into the rubber part, the upper bulge plate and the lower bulge plate being disposed so as to be aligned with the rear-upper support and the rear-lower support in the longitudinal direction.
According to the fourth embodiment of the present invention, the bulge part may include an upper bulge plate and a lower bulge plate protruding upwards and downwards from a front portion of the outer circumferential portion of the inner pipe so as to be in close contact with the front surface of the rubber part, the upper bulge plate and the lower bulge plate being disposed so as to be aligned with the rear-upper support and the rear-lower support in the longitudinal direction, and may further include a left bulge plate and a right bulge plate protruding leftwards and rightwards from a rear portion of the outer circumferential portion of the inner pipe so as to be in close contact with the rear surface of the rubber part, the left bulge plate and the right bulge plate being disposed so as to be aligned with the front-left support and the front-right support in the longitudinal direction.
According to the first embodiment of the present invention, front stoppers may protrude from the front surface of the rubber part at left and right positions so as to be in close contact with the front-left support and the front-right support, and rear stoppers may protrude from the rear surface of the rubber part at upper and lower positions so as to be in close contact with the rear-upper support and the rear-lower support.
According to the second embodiment of the present invention, the at least two supports may include a front-upper support and a front-lower support integrally formed with the front end of the outer pipe at upper and lower positions so as to be in close contact with the front surface of the rubber part to support the rubber part together with the bulge part so as to compress and expand the rubber part, and may further include a rear-upper support and a rear-lower support integrally formed with the rear end of the outer pipe at upper and lower positions so as to be in close contact with the rear surface of the rubber part to support the rubber part together with the bulge part so as to compress and expand the rubber part.
According to the second embodiment of the present invention, the bulge part may include an upper bulge plate and a lower bulge plate protruding upwards and downwards from the outer circumference of a lengthwise middle portion of the inner pipe so as to be embedded into the rubber part, the upper bulge plate and the lower bulge plate being disposed so as to be aligned with the front-upper support, the front-lower support, the rear-upper support, and the rear-lower support in the longitudinal direction.
According to the second embodiment of the present invention, front stoppers may protrude from the front surface of the rubber part at upper and lower positions so as to be in close contact with the front-upper support and the front-lower support, and rear stoppers may protrude from the rear surface of the rubber part at upper and lower positions so as to be in close contact with the rear-upper support and the rear-lower support.
According to the third embodiment of the present invention, the at least two supports may include a front single support, integrally formed with the front end of the outer pipe at a lower position so as to be in close contact with the front surface of the rubber part to support the rubber part together with the bulge part so as to compress and expand the rubber part, and a rear single support, integrally formed with the rear end of the outer pipe at an upper position so as to be in close contact with the rear surface of the rubber part to support the rubber part together with the bulge part so as to compress and expand the rubber part.
According to the third embodiment of the present invention, the bulge part may include an upper bulge plate and a lower bulge plate protruding upwards and downwards from the outer circumference of a lengthwise middle portion of the inner pipe so as to be embedded into the rubber part, the lower bulge plate being disposed so as to be aligned with the front single support in the longitudinal direction, the upper bulge plate being disposed so as to be aligned with the rear single support in the longitudinal direction.
According to the fifth embodiment of the present invention, the bulge part may include an upper bulge plate protruding upwards from a front portion of the outer circumferential portion of the inner pipe so as to be in close contact with the front surface of the rubber part, the upper bulge plate being disposed so as to be aligned with the rear single support in the longitudinal direction, and a lower bulge plate protruding downwards from a rear portion of the outer circumferential portion of the inner pipe so as to be in close contact with the rear surface of the rubber part, the lower bulge plate being disposed so as to be aligned with the front single support in the longitudinal direction.
According to the third embodiment of the present invention, a front stopper may protrude from the front surface of the rubber part at a lower position so as to be in close contact with the front single support, and a rear stopper may protrude from the rear surface of the rubber part at an upper position so as to be in close contact with the rear single support.
According to each of the embodiments of the present invention, a slit having a V-shaped section may be formed in one side portion or in each of two opposite side portions of the outer pipe and the rubber part in the longitudinal direction thereof.
According to a sixth embodiment of the present invention for accomplishing the above and other objects, a bush-type mount for a vehicle may include an outer pipe fitted into a press-fit hole formed in a frame of a vehicle body in the longitudinal direction of the vehicle, an inner pipe having a bolt hole formed therein so as to be mounted to a PE part, the inner pipe being disposed inside the outer pipe so as to be oriented in the longitudinal direction, a rubber part formed in a vulcanization-molding process so as to fill the space between the outer pipe and the inner pipe, at least two supports integrally formed at the front end of the press-fit hole so as to be in close contact with the front surface of the rubber part and integrally formed with the rear end of the outer pipe so as to be in close contact with the rear surface of the rubber part, and a bulge part integrally formed with the outer circumferential portion of the inner pipe to compress or expand the rubber part in the same direction as the direction of movement of the inner pipe, the inner pipe being mounted so as to move in the longitudinal direction.
According to the sixth embodiment of the present invention, the at least two supports may include a front-left support and a front-right support attached to the front end of the press-fit hole at left and right positions so as to be in close contact with the front surface of the rubber part to support the rubber part together with the bulge part so as to compress and expand the rubber part, and may further include a rear-upper support and a rear-lower support integrally formed with the rear end of the outer pipe at upper and lower positions so as to be in close contact with the rear surface of the rubber part to support the rubber part together with the bulge part so as to compress and expand the rubber part.
According to the sixth embodiment of the present invention, the bulge part may include a left bulge plate and a right bulge plate protruding leftwards and rightwards from the outer circumference of a lengthwise middle portion of the inner pipe so as to be embedded into the rubber part, the left bulge plate and the right bulge plate being disposed so as to be aligned with the front-left support and the front-right support in the longitudinal direction, and may further include an upper bulge plate and a lower bulge plate protruding upwards and downwards from the outer circumference of a lengthwise middle portion of the inner pipe so as to be embedded into the rubber part, the upper bulge plate and the lower bulge plate being disposed so as to be aligned with the rear-upper support and the rear-lower support in the longitudinal direction.
As a modification of the sixth embodiment of the present invention, in order to increase an extent of compression of the portion of the rubber part that is located between the bulge part, the front-left support, and the front-right support when the inner pipe moves forwards, the bulge part may be formed to be tilted backwards at a predetermined angle, and the front-left support and the front-right support may be formed to be tilted forwards at substantially the same angle as the angle of the bulge part.
As a modification of the sixth embodiment of the present invention, in order to reduce an extent of compression of the portion of the rubber part that is located between the bulge part, the front-left support, and the front-right support when the inner pipe moves forwards, the bulge part may be formed to be tilted forwards at a predetermined angle, and the front-left support and the front-right support may be formed to be tilted backwards at substantially the same angle as the angle of the bulge part.
As a modification of the sixth embodiment of the present invention, in order to adjust an extent of compression of the portion of the rubber part that is located between the bulge part, the front-left support, and the front-right support when the inner pipe moves forwards, the bulge part may be formed to be tilted forwards at a predetermined angle, and the front-left support and the front-right support may be formed to be tilted forwards at substantially the same angle as the angle of the bulge part.
As a modification of the sixth embodiment of the present invention, in order to adjust an extent of compression of the portion of the rubber part that is located between the bulge part, the front-left support, and the front-right support when the inner pipe moves forwards, the bulge part may be formed to be tilted backwards at a predetermined angle, and the front-left support and the front-right support may be formed to be tilted backwards at substantially the same angle as the angle of the bulge part.
According to the sixth embodiment of the present invention, front stoppers may protrude from the front surface of the rubber part at left and right positions so as to be in close contact with the front-left support and the front-right support, and rear stoppers may protrude from the rear surface of the rubber part at upper and lower positions so as to be in close contact with the rear-upper support and the rear-lower support.
According to the sixth embodiment of the present invention, the length that the front stoppers, which are in close contact with the front-left support and the front-right support, protrude may be set to be longer than the length that the rear stoppers protrude in order to maintain a state in which the rubber part is compressed to a predetermined extent in the axial direction by a preload.
According to seventh and eighth embodiments of the present invention for accomplishing the above and other objects, a bush-type mount for a vehicle may include an outer pipe, an inner pipe having a bolt hole formed therein so as to be mounted to a PE part, the inner pipe being disposed inside the outer pipe so as to be oriented in the longitudinal direction of the vehicle, a rubber part formed in a vulcanization-molding process so as to fill the space between the outer pipe and the inner pipe, a first separate outer pipe having at least two front supports formed so as to be in close contact with the front surface of the rubber part, the first separate outer pipe being press-fitted onto the front portion of the outer circumferential portion of the outer pipe, a second separate outer pipe having at least two rear supports formed so as to be in close contact with the rear surface of the rubber part, the second separate outer pipe being press-fitted onto the rear portion of the outer circumferential portion of the outer pipe, and a bulge part integrally formed with the outer circumferential portion of the inner pipe to compress or expand the rubber part in the same direction as the direction of movement of the inner pipe, the inner pipe being mounted so as to move in the longitudinal direction.
According to the seventh embodiment of the present invention, front stoppers may protrude from the front surface of the rubber part so as to be in close contact with the at least two front supports, and rear stoppers may protrude from the rear surface of the rubber part so as to be in close contact with the at least two rear supports.
According to the seventh embodiment of the present invention, the lengths that the front stoppers and the rear stoppers protrude may be set to lengths by which the rubber part is capable of being compressed by the at least two front supports and the at least two rear supports when the first separate outer pipe and the second separate outer pipe are fitted onto the outer circumferential portion of the outer pipe and come into contact with each other in order to maintain a state in which the rubber part is compressed to a predetermined extent in the axial direction by a preload.
According to the eighth embodiment of the present invention, the first separate outer pipe and the second separate outer pipe may be directly fitted onto the outer circumferential portion of the rubber part.
According to the eighth embodiment of the present invention, the outer diameter of the rubber part may be greater than the inner diameters of the first separate outer pipe and the second separate outer pipe in order to maintain a state in which the rubber part is compressed to a predetermined extent in the radial direction.
Other aspects and preferred embodiments of the invention are discussed infra.
It is understood that the term “vehicle” or “vehicular” or other similar term as used herein is inclusive of motor vehicles in general such as passenger automobiles including sports utility vehicles (SUV), buses, trucks, various commercial vehicles, watercraft including a variety of boats and ships, aircraft, and the like, and includes hybrid vehicles, electric vehicles, plug-in hybrid electric vehicles, hydrogen-powered vehicles and other alternative fuel vehicles (e.g. fuels derived from resources other than petroleum). As referred to herein, a hybrid vehicle is a vehicle that has two or more sources of power, for example both gasoline-powered and electric-powered vehicles.
The above and other features of the invention are discussed infra.
The above and other features of the present invention will now be described in detail with reference to certain exemplary embodiments thereof illustrated in the accompanying drawings which are given hereinbelow by way of illustration only, and thus are not limitative of the present invention, and wherein:
It should be understood that the appended drawings are not necessarily to scale, presenting a somewhat simplified representation of various preferred features illustrative of the basic principles of the invention. The specific design features of the present invention as disclosed herein, including, for example, specific dimensions, orientations, locations, and shapes, will be determined in part by the particular intended application and use environment.
In the figures, reference numbers refer to the same or equivalent parts of the present invention throughout the several figures of the drawing.
Hereinafter, reference will now be made in detail to various embodiments of the present invention, examples of which are illustrated in the accompanying drawings and described below.
The bush-type mount according to the first embodiment of the present invention basically includes an outer pipe 100, which is fitted into a press-fit hole formed in a frame of a vehicle body in the longitudinal direction of a vehicle, an inner pipe 300, which has a bolt hole 302 formed therein so as to be mounted to a PE part and is disposed inside the outer pipe 100 so as to be oriented in the longitudinal direction, and a rubber part 200, which is formed in a vulcanization-molding process so as to fill the space between the inner circumferential portion of the outer pipe 100 and the outer circumferential portion of the inner pipe 300.
At least two supports 110 are formed at the front and rear ends of the outer pipe 100 so as to be in close contact with the front and rear surfaces of the rubber part 200. The supports 110 may be integrally formed with the front and rear ends of the outer pipe 100, or may be attached thereto through welding or the like so as to extend toward the rubber part 200.
In addition, a bulge part 310 is integrally formed with the outer circumferential portion of the inner pipe 300 so as to be aligned with the supports 110 in the longitudinal direction of the vehicle. The bulge part 310 functions to compress or expand the rubber part 200 in the same direction as the direction of movement of the inner pipe 300, which moves in the longitudinal direction of the vehicle.
According to the first embodiment of the present invention, as shown in
Each of the front-left support 111, the front-right support 112, the rear-upper support 116, and the rear-lower support 117 may be formed in the shape of a plate, and may be made of the same metal material as that of the outer pipe 100. The supports 111, 112, 116, and 117 may be bent and extend from the outer pipe 100 toward the front and rear surfaces of the rubber part 200 in a direction perpendicular to the longitudinal direction of the outer pipe 100.
According to the first embodiment of the present invention, as shown in
According to the first embodiment of the present invention, front stoppers 201 protrude from the front surface of the rubber part 200 at left and right positions so as to be in close contact with the front-left support 111 and the front-right support 112, and rear stoppers 202 protrude from the rear surface of the rubber part 200 at upper and lower positions so as to be in close contact with the rear-upper support 116 and the rear-lower support 117.
Depending on how the supports 111, 112, 116, and 117 are configured, the protruding lengths of the front stoppers 201 and the rear stoppers 202 may be set differently, and a preload may be applied to the front stoppers 201 and the rear stoppers 202.
For example, if the rubber part 200 is formed in a vulcanization-molding process such that the front stoppers 201 and the rear stoppers 202 protrude further than the outer pipe 100 and thereafter the supports 111, 112, 116, and 117 are formed so as to extend from the outer pipe 100 toward the front and rear surfaces of the rubber part 200, the front stoppers 201 and the rear stoppers 202 are compressed while receiving a preload.
The outer pipe 100 is press-fitted into the press-fit hole formed in the frame of the vehicle body in the longitudinal direction of the vehicle, and the inner pipe 300 is connected to the PE part (e.g. the motor or the speed reducer) by means of a bolt fastened into the bolt hole 302. In this way, the bush-type mount according to the first embodiment of the present invention is disposed in the longitudinal direction of the vehicle.
Hereinafter, the operation of the bush-type mount according to the first embodiment of the present invention will be described.
As shown in
Also, as shown in
As described above with reference to
As described above, according to the first embodiment of the present invention, when the inner pipe 300 moves relative to the outer pipe 100 in the axial direction, the rubber part 200 undergoes compressive or tensile deformation, rather than shear deformation, thus making it possible to increase freedom of adjustment of the axial property of the bush-type mount.
The bush-type mount according to the second embodiment of the present invention basically includes an outer pipe 100, which is fitted into the press-fit hole formed in the frame of a vehicle body in the longitudinal direction of the vehicle, an inner pipe 300, which has a bolt hole 302 formed therein so as to be mounted to the PE part and is disposed inside the outer pipe 100 so as to be oriented in the longitudinal direction, and a rubber part 200, which is formed in a vulcanization-molding process so as to fill the space between the inner circumferential portion of the outer pipe 100 and the outer circumferential portion of the inner pipe 300. Compared to the above-described first embodiment, the second embodiment has a difference with regard to the structure of supports 110 formed at the front and rear ends of the outer pipe 100 and the structure of a bulge part 310 formed on the outer circumferential portion of the inner pipe 300.
According to the second embodiment of the present invention, as shown in
According to the second embodiment of the present invention, as shown in
According to the second embodiment of the present invention, front stoppers 201 protrude from the front surface of the rubber part 200 at upper and lower positions so as to be in close contact with the front-upper support 113 and the front-lower support 114, and rear stoppers 202 protrude from the rear surface of the rubber part 200 at upper and lower positions so as to be in close contact with the rear-upper support 116 and the rear-lower support 117.
The outer pipe 100 is press-fitted into the press-fit hole formed in the frame of the vehicle body in the longitudinal direction of the vehicle, and the inner pipe 300 is connected to the PE part (e.g. the motor or the speed reducer) by means of a bolt fastened into the bolt hole 302. In this way, the bush-type mount according to the second embodiment of the present invention is disposed in the longitudinal direction of the vehicle.
Hereinafter, the operation of the bush-type mount according to the second embodiment of the present invention will be described.
As shown in
Also, as shown in
As described above, according to the second embodiment of the present invention, when the inner pipe 300 moves forwards and backwards, compression and expansion occur simultaneously in the rubber part 200 along the same axis, thus making the axial property of the rubber part 200 higher than that in the above-described first embodiment.
Accordingly, the bush-type mount according to the second embodiment of the present invention, which exhibits a high axial property, is capable of solving the above-described problem associated with the conventional bush-type mount, which has a low axial property and thus fails to appropriately respond to impacts and aftershock and causes deterioration in driving performance.
The bush-type mount according to the third embodiment of the present invention is characterized by maximizing the areas of supports 110 formed at the outer pipe 100 while minimizing the number of supports 110 in order to facilitate assembly and manufacture of the bush-type mount.
To this end, as shown in
In this case, the front single support 115 and the rear single support 118 of the supports 110 are integrally formed with the front end and the rear end of the outer pipe 100 so as to have maximum areas within a range within which interference with the inner pipe 300 is avoided.
According to the third embodiment of the present invention, as shown in
In this case, in order to facilitate compression of the rubber part 200, it is desirable to maximize the areas of the lower bulge plate 317 and the upper bulge plate 316 so as to correspond to the maximized areas of the front single support 115 and the rear single support 118.
According to the third embodiment of the present invention, a front stopper 201 protrudes from the front surface of the rubber part 200 at a lower position so as to be in close contact with the front single support 115, and a rear stopper 202 protrudes from the rear surface of the rubber part 200 at an upper position so as to be in close contact with the rear single support 118.
The outer pipe 100 is press-fitted into the press-fit hole formed in the frame of the vehicle body in the longitudinal direction of the vehicle, and the inner pipe 300 is connected to the PE part (e.g. the motor or the speed reducer) by means of a bolt fastened into the bolt hole 302. In this way, the bush-type mount according to the third embodiment of the present invention is disposed in the longitudinal direction of the vehicle.
Hereinafter, the operation of the bush-type mount according to the third embodiment of the present invention will be described.
As shown in
Also, as shown in
Accordingly, the bush-type mount according to the third embodiment of the present invention, which exhibits a high axial property, is capable of solving the above-described problem associated with the conventional bush-type mount, which has a low axial property and thus fails to appropriately respond to impacts and aftershock and causes deterioration in driving performance.
As described above, according to the third embodiment of the present invention, the number of supports 110 is minimized while the areas thereof are maximized, and accordingly, assembly and manufacture of the bush-type mount may be more easily realized than in the case of the first and second embodiments. Also, the rubber part 200 undergoes compressive or tensile deformation, rather than shear deformation, thus making it possible to increase freedom of adjustment of the axial property of the bush-type mount.
The bush-type mount according to the fourth embodiment of the present invention has a configuration similar to that of the first embodiment, and is characterized in that the bulge part 310 formed at the inner pipe 300 is in close contact with the front and rear surfaces of the rubber part 200.
Similar to the first embodiment, according to the fourth embodiment of the present invention, as shown in
Also, according to the fourth embodiment of the present invention, as shown in
According to the fourth embodiment of the present invention, front stoppers 201 protrude from the front surface of the rubber part 200 at left and right positions so as to be in close contact with the front-left support 111 and the front-right support 112, and rear stoppers 202 protrude from the rear surface of the rubber part 200 at upper and lower positions so as to be in close contact with the rear-upper support 116 and the rear-lower support 117.
The outer pipe 100 is press-fitted into the press-fit hole formed in the frame of the vehicle body in the longitudinal direction of the vehicle, and the inner pipe 300 is connected to the PE part (e.g. the motor or the speed reducer) by means of a bolt fastened into the bolt hole 302. In this way, the bush-type mount according to the fourth embodiment of the present invention is disposed in the longitudinal direction of the vehicle.
As described above, according to the fourth embodiment of the present invention, since the bulge part 310 is formed so as to be in close contact with the front and rear surfaces of the rubber part 200, rather than being embedded into the rubber part 200, it is possible to maximize the initial length before compression of the rubber part 200, thereby providing freedom of adjustment of the axial property and the radial property of the rubber part.
Hereinafter, the operation of the bush-type mount according to the fourth embodiment of the present invention will be described.
As shown in
Also, as shown in
Accordingly, the bush-type mount according to the fourth embodiment of the present invention, which exhibits a high axial property, is capable of solving the above-described problem associated with the conventional bush-type mount, which has a low axial property and thus fails to appropriately respond to impacts and aftershock and causes deterioration in driving performance.
As described above, according to the fourth embodiment of the present invention, when the inner pipe 300 moves relative to the outer pipe 100 in the axial direction, the rubber part 200 undergoes compressive deformation, rather than shear deformation, thus making it possible to increase the axial property of the bush-type mount. Also, since the bulge part 310 is formed so as to be in close contact with the front and rear surfaces of the rubber part 200, rather than being embedded into the rubber part 200, it is possible to maximize the initial length before compression of the rubber part 200, thereby providing freedom of adjustment of the axial property and the radial property of the rubber part.
The bush-type mount according to the fifth embodiment of the present invention has a configuration similar to that of the third embodiment, and is characterized in that the bulge part 310 formed at the inner pipe 300 is in close contact with the front and rear surfaces of the rubber part 200.
Similar to the third embodiment, according to the fifth embodiment of the present invention, as shown in
Also, according to the fifth embodiment of the present invention, as shown in
According to the fifth embodiment of the present invention, a front stopper 201 protrudes from the front surface of the rubber part 200 at a lower position so as to be in close contact with the front single support 115, and a rear stopper 202 protrudes from the rear surface of the rubber part 200 at an upper position so as to be in close contact with the rear single support 118.
The outer pipe 100 is press-fitted into the press-fit hole formed in the frame of the vehicle body in the longitudinal direction of the vehicle, and the inner pipe 300 is connected to the PE part (e.g. the motor or the speed reducer) by means of a bolt fastened into the bolt hole 302. In this way, the bush-type mount according to the fifth embodiment of the present invention is disposed in the longitudinal direction of the vehicle.
Particularly, according to the fifth embodiment of the present invention, since the bulge part 310 is formed so as to be in close contact with the front and rear surfaces of the rubber part 200, rather than being embedded into the rubber part 200, it is possible to maximize the initial length before compression of the rubber part 200, thereby providing freedom of adjustment of the axial property and the radial property of the rubber part.
Hereinafter, the operation of the bush-type mount according to the fifth embodiment of the present invention will be described.
As shown in
Also, as shown in
Accordingly, the bush-type mount according to the fifth embodiment of the present invention, which exhibits a high axial property, is capable of solving the above-described problem associated with the conventional bush-type mount, which has a low axial property and thus fails to appropriately respond to impacts and aftershock and causes deterioration in driving performance.
As described above, according to the fifth embodiment of the present invention, the number of supports 110 is minimized while the areas thereof are maximized, and accordingly, assembly and manufacture of the bush-type mount may be more easily realized than in the case of the first and second embodiments. Also, since the bulge part 310 is formed so as to be in close contact with the front and rear surfaces of the rubber part 200, rather than being em bedded into the rubber part 200, it is possible to maximize the initial length before compression of the rubber part 200, thereby providing freedom of adjustment of the axial property and the radial property of the rubber part.
In addition, as shown in
Accordingly, when swaging is performed in order to press the outer circumferential portion of the outer pipe 100, the inner surfaces of the slit 210 having a V-shaped section come into contact with each other, whereby the outer pipe 100 is easily formed in the shape of a perfect circle. Thus, it is possible to prevent the outer pipe from being undesirably deformed or damaged when swaging is performed in order to form the outer pipe in a perfectly circular shape.
In the state in which the inner surfaces of the slit 210 having a V-shaped section are in contact with each other, the outer pipe 100 is press-fitted into the press-fit hole formed in the frame of the vehicle body in the longitudinal direction of the vehicle, and the inner pipe 300 is connected to the PE part (e.g. the motor or the speed reducer) by means of a bolt fastened into the bolt hole 302. In this way, the bush-type mount according to each of the above-described embodiments is disposed in the longitudinal direction of the vehicle.
In addition, when the outer pipe 100 is press-fitted into the press-fit hole formed in the frame of the vehicle body in the longitudinal direction of the vehicle, the inner surfaces of the slit 210 having a V-shaped section come into contact with each other, and thus the rubber part 200 is continuously maintained in a radially compressed state by a preload. Accordingly, it is possible to increase the radial property of the rubber part, and as a result, it is possible to provide freedom of adjustment of the properties of the bush-type mount according to each of the above-described embodiments along three axes (in the axial direction, the vertical radial direction, and the lateral radial direction).
The bush-type mount according to the sixth embodiment of the present invention basically includes an outer pipe 100, which is fitted into a press-fit hole 402 formed in a frame 400 of the vehicle body in the longitudinal direction of the vehicle, an inner pipe 300, which has a bolt hole 302 formed therein so as to be mounted to a PE part and is disposed inside the outer pipe 100 so as to be oriented in the longitudinal direction, and a rubber part 200, which is formed in a vulcanization-molding process so as to fill the space between the inner circumferential portion of the outer pipe 100 and the outer circumferential portion of the inner pipe 300.
The bush-type mount according to the sixth embodiment of the present invention further includes at least two supports 110, which are integrally formed with the front end of the press-fit hole 402 in the frame 400 of the vehicle body so as to be in close contact with the front surface of the rubber part 200 and are integrally formed with the rear end of the outer pipe 100 so as to be in close contact with the rear surface of the rubber part 200, and a bulge part 310, which is integrally formed with the outer circumferential portion of the inner pipe 300 so as to compress or expand the rubber part 200 in the same direction as the direction of movement of the inner pipe 300, which moves in the longitudinal direction of the vehicle.
The supports 110 formed at the front end of the press-fit hole 402 in the frame 400 of the vehicle body may be attached thereto through welding or the like. The supports 110 formed at the rear end of the outer pipe 100 may be attached thereto through welding or the like, or may be bent and extend therefrom so as to be in close contact with the rear surface of the rubber part 200.
According to the sixth embodiment of the present invention, as shown in
In this case, each of the front-left support 111 and the front-right support 112 may be formed in the shape of a plate, and may be made of the same metal material as that of the frame 400 of the vehicle body. The front-left support 111 and the front-right support 112 may be disposed in a direction perpendicular to the longitudinal direction of the outer pipe 100 so as to be in close contact with the front surface of the rubber part 200. Each of the rear-upper support 116 and the rear-lower support 117 may be formed in the shape of a plate, and may be made of the same metal material as that of the outer pipe 100. The rear-upper support 116 and the rear-lower support 117 may be bent and extend from the outer pipe 100 toward the rear surface of the rubber part 200 in a direction perpendicular to the longitudinal direction of the outer pipe 100.
According to the sixth embodiment of the present invention, as shown in
According to the sixth embodiment of the present invention, front stoppers 201 protrude from the front surface of the rubber part 200 at left and right positions so as to be in close contact with the front-left support 111 and the front-right support 112, and rear stoppers 202 protrude from the rear surface of the rubber part 200 at upper and lower positions so as to be in close contact with the rear-upper support 116 and the rear-lower support 117.
The outer pipe 100 is press-fitted into the press-fit hole formed in the frame of the vehicle body in the longitudinal direction of the vehicle, and the inner pipe 300 is connected to the PE part (e.g. the motor or the speed reducer) by means of a bolt fastened into the bolt hole 302. In this way, the bush-type mount according to the sixth embodiment of the present invention is disposed in the longitudinal direction of the vehicle.
As described above, according to the sixth embodiment of the present invention, some of the supports 110, i.e. the front-left support 111 and the front-right support 112, are formed at the front end of the press-fit hole 402 in the frame 400 of the vehicle body, rather than being formed at the front end of the outer pipe 100, thereby facilitating manufacture and assembly of the outer pipe.
In addition, according to the sixth embodiment of the present invention, as shown in
The outer pipe 100 is press-fitted into the press-fit hole 402 formed in the frame 400 of the vehicle body in the longitudinal direction of the vehicle, and the inner pipe 300 is connected to the PE part (e.g. the motor or the speed reducer) by means of a bolt fastened into the bolt hole 302. In this way, the bush-type mount according to the sixth embodiment of the present invention is disposed in the longitudinal direction of the vehicle.
Hereinafter, the operation of the bush-type mount according to the sixth embodiment of the present invention will be described.
As shown in
Also, as shown in
As described above with reference to
Further, according to the sixth embodiment of the present invention, some of the supports 110, i.e. the front-left support 111 and the front-right support 112, are formed at the front end of the press-fit hole 402 in the frame 400 of the vehicle body, rather than being formed at the front end of the outer pipe 100, thereby facilitating manufacture and assembly of the outer pipe.
Furthermore, when the outer pipe 100 of the bush-type mount according to the sixth embodiment of the present invention is press-fitted into the press-fit hole 402 in the frame 400 of the vehicle body, the rubber part 200 may be maintained in the state of being compressed to a predetermined extent in the axial direction by a preload.
To this end, as described above, the length that the front stoppers 201 of the rubber part 200, which are in close contact with the front-left support 111 and the front-right support 112, protrude is set to be longer than the length that the rear stoppers 202 protrude.
Accordingly, when the outer pipe 100 is press-fitted into the press-fit hole 402 in the frame 400 of the vehicle body, as shown in
On the other hand, as a modification of the bush-type mount according to the sixth embodiment of the present invention, the supports 110 and the bulge part 310 may be formed to be tilted at a predetermined angle in order to adjust the extent of com pression and the property of the rubber part 200.
As a modification of the bush-type mount according to the sixth embodiment of the present invention, as shown in
As a modification of the bush-type mount according to the sixth embodiment of the present invention, as shown in
As a modification of the bush-type mount according to the sixth embodiment of the present invention, as shown in
As a modification of the bush-type mount according to the sixth embodiment of the present invention, as shown in
As a modification of the bush-type mount according to the sixth embodiment of the present invention, as shown in
As a modification of the bush-type mount according to the sixth embodiment of the present invention, as shown in
The bush-type mount according to the seventh embodiment of the present invention is characterized in that first and second separate outer pipes 510 and 520, at which supports 110 are formed, are fitted onto an outer pipe 100.
As shown in
As shown in
In addition, as shown in
In addition, front stoppers 201 protrude from the front surface of the rubber part 200 so as to be in close contact with the front supports 512, and rear stoppers 202 protrude from the rear surface of the rubber part 200 so as to be in close contact with the rear supports 522.
Preferably, the lengths that the front stoppers 201 and the rear stoppers 202 protrude are set to lengths by which the rubber part 200 can be compressed by the front supports 512 and the rear supports 522 when the first separate outer pipe 510 and the second separate outer pipe 520 are fitted onto the outer circumferential portion of the outer pipe 100 and come into contact with each other.
Accordingly, as shown in
As described above, according to the seventh embodiment of the present invention, due to the first and second separate outer pipes 510 and 520 having the supports, swaging may be easily performed on the outer pipe 100 of the bush-type mount, the durability of the bush-type mount may be improved, and the axial property of the bush-type mount may be increased by a preload.
The bush-type mount according to the eighth embodiment of the present invention is characterized in that a first separate outer pipe 510 and a second separate outer pipe 520 are directly fitted onto the outer circumferential portion of a rubber part 200.
That is, the bush-type mount according to the eighth embodiment of the present invention is characterized in that an outer pipe is eliminated and a first separate outer pipe 510 and a second separate outer pipe 520 are directly fitted onto the outer circumferential portion of a rubber part 200.
To this end, as shown in
In addition, as shown in
In addition, front stoppers 201 protrude from the front surface of the rubber part 200 so as to be in close contact with the front supports 512, and rear stoppers 202 protrude from the rear surface of the rubber part 200 so as to be in close contact with the rear supports 522.
Preferably, the lengths that the front stoppers 201 and the rear stoppers 202 protrude are set to lengths by which the rubber part 200 can be compressed by the front supports 512 and the rear supports 522 when the first separate outer pipe 510 and the second separate outer pipe 520 are fitted onto the outer circumferential portion of the rubber part 200 and come into contact with each other.
Further, according to the eighth embodiment of the present invention, in order to maintain the state in which the rubber part 200 is compressed to a predetermined extent in the radial direction, the outer diameter of the rubber part 200 may be greater than the inner diameters of the first separate outer pipe 510 and the second separate outer pipe 520.
Accordingly, as shown in
Further, since the outer diameter of the rubber part 200 is greater than the inner diameters of the first separate outer pipe 510 and the second separate outer pipe 520, as can be seen from the enlarged views in
As described above, according to the eighth embodiment of the present invention, since the first and second separate outer pipes 510 and 520 having the supports are directly fitted onto the rubber part 200, it is possible to reduce the number of parts due to elimination of an outer pipe of the bush-type mount and to provide property adjustment freedom enabling an increase in the axial property and the radial property of the bush-type mount using a preload.
As is apparent from the above description, the present invention has the following effects.
First, it is possible to provide freedom of adjustment of the properties of the bush-type mount along three axes so as to increase the axial property of the bush-type mount to the level of the radial property thereof or to increase both the axial property and the radial property thereof after mounting of the bush-type mount, thereby appropriately adjusting the properties of an entire mount system in all directions irrespective of the direction in which the bush-type mount is disposed.
Second, since the bush-type mount according to the present invention exhibits a high axial property, it is possible to solve the problem associated with the conventional bush-type mount, which has a low axial property and thus fails to appropriately respond to impacts and aftershock and causes deterioration in driving performance.
The invention has been described in detail with reference to preferred embodiments thereof. However, it will be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2021-0134641 | Oct 2021 | KR | national |
