The disclosure relates to the technical field of bogies, and in particular to a swing bolster, a swing bolster vibration reduction assembly and a bogie.
A cast steel three-piece bogie is the most common bogie type in a rail wagon. As shown in
The weight of a wagon body acts on the vertical elastic elements 40′ through the body 10′ of the swing bolster, the vertical elastic elements 40′ are used for alleviating impact force from a rail and disturbing force of vibration, and a function of preventing system vibration is realized because the direction of acting force of the vertical elastic elements 40′ is opposite to its movement direction. Meanwhile, under the action of acting force of the wagon body and counterforce of springs, certain pressure may be generated between the upright post wearing plates 70′ and the friction blocks 20′ and between the slope wearing plates 90′ and the friction blocks 20′. In a vibration process of the wagon body, relative movement and friction may be produced between the upright post wearing plates 70′ and the friction blocks 20′ and between the slope wearing plates 90′ and the friction blocks 20′, so that vibration kinetic energy is converted into friction heat energy to fulfil the aim of reducing the vibration and impact of a wagon.
The slope wearing plates 90′ may be thinned after long-term friction between the body 10′ of the swing bolster and the friction blocks 20′, which causes the upward movement of the friction blocks 20′ to further reduce compression amounts of the vertical elastic elements 40′ and namely reduce vibration reduction capabilities of the vertical elastic elements 40′. Particularly during unloaded running of the bogie, the compression amounts of the vertical elastic elements 40′ are small, so that a poor vibration reduction effect and a potential running safety hazard during the unloaded running of the bogie are caused.
A purpose of the disclosure is to provide a swing bolster, a swing bolster vibration reduction assembly and a bogie, so as to solve the problem of influence of high wear of a swing bolster and friction blocks on the vibration reduction effect of vertical elastic elements in the prior art.
In order to solve the technical problem, according to an aspect of the disclosure, a swing bolster is provided, which comprises a body, wherein a mounting cavity for mounting a friction block is formed in two ends of the body; the mounting cavity is provided with a first horizontal opening and a second horizontal opening, which are opposite to each other; and opening directions of the first horizontal opening and the second horizontal opening are perpendicular to an extending direction of the body.
Furthermore, the body is provided with: a first vertical hole, the first vertical hole is communicated with the mounting cavity; and a second vertical hole, the second vertical hole is communicated with the mounting cavity, the second vertical hole and the first vertical hole being coaxially formed, a part of the friction block being arranged in the first vertical hole and the second vertical hole in a sliding manner.
Furthermore, a diameter of the first vertical hole is greater than that of the second vertical hole.
According to another aspect of the disclosure, a swing bolster vibration reduction assembly is provided, which comprises a swing bolster and a vibration reduction unit, wherein the swing bolster is the abovementioned swing bolster; a body of the swing bolster is provided with a first vertical hole, and the first vertical hole is communicated with a mounting cavity; the vibration reduction unit comprises a friction block, a horizontal elastic element and vertical elastic elements; the friction block comprises: a first friction block, the first friction block being arranged in the mounting cavity of the swing bolster, a first end of the first friction block extending from a first horizontal opening of the mounting cavity; a second friction block, the second friction block being arranged in the mounting cavity of the swing bolster, the second friction block being positioned in an extending direction of the first friction block, a first end of the second friction block extending from a second horizontal opening of the mounting cavity, the horizontal elastic element being arranged between the first friction block and the second friction block; a middle wedge, the middle wedge being arranged in the mounting cavity of the swing bolster, the middle wedge being positioned between the first friction block and the second friction block, the middle wedge being matched with the first friction block and the second friction block through slopes, a bottom end of the middle wedge extending from the first vertical hole; and there are multiple vertical elastic elements, the multiple vertical elastic elements are arranged below the swing bolster, and at least one vertical elastic element is positioned under the bottom end of the middle wedge.
Furthermore, the horizontal elastic element comprises: a first horizontal elastic element, the first horizontal elastic element being arranged between the first friction block and the middle wedge in a pressing manner; and a second horizontal elastic element, the second horizontal elastic element being arranged between the second friction block and the middle wedge in the pressing manner.
Furthermore, the body of the swing bolster is provided with a pressing plate, the pressing plate is arranged in the mounting cavity, the pressing plate and the middle wedge are arranged at an interval, and the horizontal elastic element comprises: a first horizontal elastic element, the first horizontal elastic element being arranged between the first friction block and the pressing plate in the pressing manner; and a second horizontal elastic element, the second horizontal elastic element being arranged between the second friction block and the pressing plate in the pressing manner.
Furthermore, the first friction block is provided with a first accommodation cavity, an opening of the first accommodation cavity faces the second friction block, and at least a part of the first horizontal elastic element is positioned in the first accommodation cavity; and the second friction block is provided with a second accommodation cavity, an opening of the second accommodation cavity faces the first friction block, and at least a part of the second horizontal elastic element is positioned in the second accommodation cavity.
Furthermore, the body of the swing bolster is provided with a second vertical hole, the second vertical hole is communicated with the mounting cavity, the second vertical hole and the first vertical hole are coaxially formed, and two ends of the middle wedge are arranged in the first vertical hole and the second vertical hole in a sliding manner.
Furthermore, the vibration reduction unit further comprises: a friction sleeve, the friction sleeve being provided with a first avoiding hole for avoiding the middle wedge, the friction sleeve being arranged at the second vertical hole, a top end of the middle wedge being connected with the second vertical hole of the swing bolster through the friction sleeve in a sliding manner; and a stopping sleeve, the stopping sleeve being provided with a second avoiding hole for avoiding the middle wedge, the stopping sleeve being arranged at the first vertical hole, the bottom end of the middle wedge extending from the second avoiding hole of the stopping sleeve, the stopping sleeve being provided with a flange for stopping the middle wedge.
Furthermore, the vibration reduction unit further comprises a upright post wearing plate, there are two upright post wearing plates, the upright post wearing plates are fixedly arranged, one upright post wearing plate in the two upright post wearing plates is pressed against a first end of the first friction block, and another upright post wearing plate in the two upright post wearing plates is pressed against the first end of the second friction block.
According to another aspect of the disclosure, a bogie is provided, which comprises a side frame and a swing bolster vibration reduction assembly, wherein the swing bolster vibration reduction assembly is arranged on the side frame, and the swing bolster vibration reduction assembly is the abovementioned swing bolster vibration reduction assembly.
In the disclosure, the mounting cavity for mounting the friction blocks are formed in two ends of the body of the swing bolster, the mounting cavity are provided with the first horizontal opening and the second horizontal opening, which are opposite to each other, and the opening directions of the first horizontal opening and the second horizontal opening are perpendicular to the extending direction of the body. When the swing bolster in the disclosure is used, the friction block is mounted in the mounting cavity of the body of the swing bolster, and end parts of the friction block extend out of the first horizontal opening and second horizontal opening of the mounting cavity. The friction block is not matched with the swing bolster through slopes, and a movement direction of the swing bolster is perpendicular to a movement direction of the friction block relative to the swing bolster, so that wear of the friction block and the swing bolster is reduced, influence caused by the relative movement or wear of the swing bolster and the friction block to vibration reduction performance of the vertical elastic elements is prevented, a vibration reduction effect of the bogie in an unloaded state is ensured, and using reliability of the swing bolster is ensured.
The drawings forming a part of the disclosure are used to provide further understanding of the disclosure, and schematic embodiments and their descriptions of the disclosure are adopted to explain the disclosure and not intended to properly limit the disclosure. In the drawings:
References in the drawings: 10. body; 11. mounting cavity; 11a. first horizontal opening; 11b. second horizontal opening; 12. first vertical hole; 13. second vertical hole; 20. friction block; 21. first friction block; 21a. first accommodation cavity; 22. second friction block; 22a. second accommodation cavity; 23. middle wedge; 30. horizontal elastic element; 31. first horizontal elastic element; 32. second horizontal elastic element; 40. vertical elastic element; 50. friction sleeve; 60. stopping sleeve; 61. flange; 70. upright post wearing plate; 80. side frame; 10′. body; 20′. friction block; 40′. vertical elastic element; 70′. upright post wearing plate; 80′. side frame; and 90′. slope wearing plate.
The embodiment of the disclosure is described below with reference to the drawings in detail, but the disclosure may be implemented in multiple different manners defined and covered by Claims.
As a first aspect of the disclosure, a swing bolster is provided. As shown in
As a second aspect of the disclosure, a swing bolster vibration reduction assembly is provided. As shown in
In the embodiments as shown in
In the embodiments as shown in
In the embodiments as shown in
In an example of the bogie, it should be noted that it is necessary to ensure a certain gap between the middle wedge 23 and each of the first friction block 21 and the second friction block 22 during unloaded running to ensure the reliable running of the swing bolster vibration reduction assembly because an empty vehicle is more lightly loaded and a heavy vehicle is excessively loaded, and then the first friction block 21 and the second friction block 22 are pressed against upright post wearing plates 70 through the horizontal elastic element 30 to ensure stable damping force of the system; and during loaded running, the horizontal elastic element 30 cannot independently provide enough damping force, and then it is necessary to rigidly press the middle wedge 23 against the first friction block 21 and the second friction block 22 to provide stable and reliable damping force. When the swing bolster downwards presses to a certain extent, the vertical elastic element 40 positioned under the bottom end of the middle wedge 23 jacks the middle wedge 23 to make the middle wedge 23 rigidly contact with the first friction block 21 and the second friction block 22, thereby ensuring stable pressing force and stable damping force. Since the middle wedge 23 rigidly contacts with the first friction block 21 and the second friction block 22, when the load is further increased, the acting force between the middle wedge 23 and each of the first friction block 21 and the second friction block 22 may be increased to ensure that the swing bolster vibration reduction assembly can effectively reduce vibration even when bearing a heavy load and ensure the vibration reduction reliability of the swing bolster vibration reduction assembly. Meanwhile, after the middle wedge 23 is rigidly pressed against the first friction block 21 and the second friction block 22, the three may not move relatively along with the movement of the swing bolster, so that wear between each part is reduced, the service life of each part is prolonged, the movement stability and vibration reduction reliability of the swing bolster vibration reduction assembly are ensured, and the using reliability of the swing bolster vibration reduction assembly is improved.
In the embodiment as shown in
In the embodiment as shown in
In the embodiments as shown in
Preferably, the first horizontal elastic element 31 and the second horizontal elastic element 32 are springs. Further, there are multiple first horizontal elastic elements 31 and multiple second horizontal elastic elements 32. Furthermore, the first horizontal elastic elements 31 and the second horizontal elastic elements 32 are horizontally or approximately horizontally mounted.
In the embodiments as shown in
In the embodiments as shown in
Preferably, the friction sleeve 50 and the stopping sleeve 60 may form a split structure as well as an integrated structure with the swing bolster. When the friction sleeve 50 and the stopping sleeve 60 form a split structure with the swing bolster, interference fit, bolt connection or the like should be adopted; and when the friction sleeve 50 and the stopping sleeve 60 form an integrated structure with the swing bolt, welding connection may be adopted.
Preferably, the middle wedge 23 is of a wedge-shaped structure. Of course, the middle wedge 23 may also be of a conical structure, a parabolic structure, a partially spherical structure or the like.
In the embodiments as shown in
The swing bolster vibration reduction assembly in the disclosure has the characteristic of slight influence of wear on the vibration reduction performance (particularly under the unloaded condition), and meanwhile, the space for the arrangement of the vertical elastic elements 40, particularly the space for the arrangement of the vertical elastic elements 40 directly contacting with the swing bolster, below the swing bolster is enlarged.
As a third aspect of the disclosure, a bogie is provided. As shown in
Under unloaded condition, the horizontal elastic element 30 has a certain compression amount, and the horizontal displacement and downward displacement of the middle wedge 23 are limited by the stopping sleeve 60, so that certain pressure is generated between the friction block 20 and the upright post wearing plates 70, and the aim of reducing the vibration and impact of the vehicle is fulfilled.
Under a heavily-loaded condition, the swing bolster moves downwards, the middle wedge 23 contacts with the vertical elastic elements 40 to compress the vertical elastic elements 40, and then the vertical elastic elements 40 generate counterforce on the middle wedge 23, so that the middle wedge 23 generates acting force on the friction block 20 to generate certain pressure between the friction block 20 and the upright post wearing plates 70, and the vertical elastic elements 40 are compressed to fulfil the aim of reducing the vibration and impact of the vehicle.
The above is only the preferred embodiment of the disclosure and not intended to limit the disclosure, and for those skilled in the art, the disclosure may have various modifications and variations. Any modifications, equivalent replacements, improvements and the like made within the spirit and principle of the disclosure shall be included in the scope of protection of the disclosure.
Number | Date | Country | Kind |
---|---|---|---|
201310617318.X | Nov 2013 | CN | national |
Filing Document | Filing Date | Country | Kind |
---|---|---|---|
PCT/CN2014/081020 | 6/27/2014 | WO | 00 |