An isolator, or bushing, is used for isolation of components in a vehicle. For example, a drive unit in a vehicle includes one or more isolator used to isolation one or more components from vibration generated by the drive unit.
This application is directed to isolators, and more particularly, to isolators covered by clamshell covers. The clamshell covers may constrain the isolator to a general location. Additionally, using the clamshell covers, the volume of the increase may increase to include lobes used as fastening points for the isolator. Beneficially, the increased volume of the bushing may enhanced noise, vibration, and harshness (NVH) performance.
In accordance with one or more aspects of the disclosure, an isolator is described. The isolator may include a first lobe comprising a first opening oriented in a first direction. The isolator may further include a second lobe comprising a second opening. The isolator may further include a body comprising a third opening oriented in a second direction different from the first direction. The first lobe and the second lobe may be integrally formed with the body.
The body, the first lobe, and the second lobe may include a rubber. The second lobe may be oriented in the second direction. The first direction may be perpendicular with respect to the second direction. The first opening and the second opening may be configured to receive a respective fastener to secure the isolator to a drive unit. The third opening may be configured to receive a structure. The isolator may be configured to isolate the structure from vibration caused by the drive unit.
The isolator may further include, a metal ring integrated with the body. The metal ring may encircle the opening. The metal ring may be positioned between the first lobe and the second lobe.
In accordance with one or more aspects of the disclosure, an isolator assembly is described. The isolator assembly may include an isolator. The isolator may include a body. The isolator may further include a first lobe extending from the body. The isolator may further include a second lobe extending from the body. The isolator assembly may further include a first cover. The isolator assembly may further include a second cover. The first cover and the second cover may combine to surround the body, the first lobe, and the second lobe.
The first cover may include a first set of extensions that at least partially covers the first lobe and the second lobe. The second cover may include a second set of extensions that at least partially covers the first lobe and the second lobe. The first lobe may include a first lobe opening. The second lobe may include a second lobe opening. The first set of extensions may include a first opening aligned with the first lobe opening. The first set of extensions may further include a second opening aligned with the second lobe opening. The second set of extensions may include a third opening aligned with the first lobe opening. The second set of extensions may further include a fourth opening aligned with the second lobe opening.
The body further may include a first curved surface. The first cover may include a first curved wall that conforms to the first curved surface. The body may include a second curved surface. The second cover may include a second curved wall that conforms to the first curved surface. The body further may include a planar surface. The first cover further may include a first sidewall that at least partially covers the planar surface. The second cover may further include a second sidewall that at least partially covers the planar surface. Based in part on the first sidewall and the second sidewall, the first cover and the second cover may be configured to constrain the isolator in two degrees.
In accordance with one or more aspects of the disclosure, a vehicle is described. The vehicle may include a drive unit. The vehicle may further include a subframe configured to carry the drive unit. The vehicle may further include an isolator assembly coupled to the subframe. The isolator assembly may include an isolator. The isolator may include a body. The isolator may further include a first lobe extending from the body. The isolator may further include a second lobe extending from the body. The isolator assembly may include a first cover. The isolator assembly may further include a second cover. The first cover and the second cover may combine to surround the body, the first lobe, and the second lobe.
The first cover may include a first set of extensions that at least partially covers the first lobe and the second lobe. The second cover may include a second set of extensions that at least partially covers the first lobe and the second lobe. The first lobe may include a first lobe opening. The second lobe may include a second lobe opening. The first set of extensions may include a first opening aligned with the first lobe opening. The first set of extensions may further include a second opening aligned with the second lobe opening. The second set of extensions may include a third opening aligned with the first lobe opening. The second set of extensions may further include a fourth opening aligned with the second lobe opening. The isolator assembly may further include a first aperture defined by the first set of extensions, the first lobe opening, and the second set of extensions. The first aperture may be configured to receive a first fastener and a first top hat bushing. The isolator assembly may further include a second aperture defined by the first set of extensions, the second lobe opening, and the second set of extensions. The second aperture may be configured to receive a second fastener and a second top hat bushing.
In accordance with one or more aspects of the disclosure, an isolator is described. The isolator may include a drive unit. The isolator may include a body. The body may include an opening. The body may further include several walls surrounding the opening. The walls may include one or more non-parallel portions. The isolator may further include a first lobe extending from the body. The first lobe may include a first lobe opening. The isolator may further include a second lobe extending from the body. The second lobe may include a second lobe opening. The walls may include a first wall and a second wall. The first wall and the second wall may define a void in the body.
Certain features of the subject technology are set forth in the appended claims. However, for purpose of explanation, several embodiments of the subject technology are set forth in the following figures.
The detailed description set forth below is intended as a description of various configurations of the subject technology and is not intended to represent the only configurations in which the subject technology may be practiced. The appended drawings are incorporated herein and constitute a part of the detailed description. The detailed description includes specific details for the purpose of providing a thorough understanding of the subject technology. However, it will be clear and apparent to those skilled in the art that the subject technology is not limited to the specific details set forth herein and may be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form in order to avoid obscuring the concepts of the subject technology.
The subject technology is directed to an isolator, or bushing, with modifications designed to increase the volume of material used to form the isolator. In one or more implementations, the isolator includes a body (e.g., bushing body) with lobes that extend from the body. The lobes may represent additional material used to further isolate one or structures from vibration (e.g., vibration from the drive unit). Further, each of the lobes may include an opening, or through hole, designed to receive a fastener and secure the isolator. Beneficially, the lobes can contribute to NVH performance while also providing an approach (e.g., the openings) for securing the bushing. The isolator may be part of an assembly that includes a pair of covers (e.g., clamshell covers) that enclose, or at least partially enclose, the isolator, including the body and the lobes. In one or more implementations, the covers function to constrain the body and the lobes of the isolator, while also having a shape that accommodates the lobes, thus allowing for additional isolator material.
The vehicle 100 may include a battery pack 102. The battery pack 102 may be coupled (e.g., electrically coupled) to one or more electrical systems of the vehicle 100 to provide power to the one or more electrical systems. The vehicle 100 may further include a port 104 (e.g., charge port) designed to receive a cable connector (not shown in
The battery pack 102 may couple to a drive unit 110a and a drive unit 110b, also referred to as a front drive unit and a rear drive unit, respectively. Each of the drive units 110a and 110b may include, for example, a motor, an inverter, a gear box, and a differential. In the example shown in
The isolator assembly 420 may include an isolator 422, or bushing. The isolator 422 may include a body 424 (e.g., bushing body), a lobe 426a, and a lobe 426b. As shown, the body 424 includes a cylindrical, or substantially cylindrical, structure that is defined in part by a curved surface 428 and a planar surface 430, with the planar surface 430 forming a circular, or substantially circular, surface defined in part by dotted lines. The lobes 426a and 426b, or cars, may extend from the body 424 in opposite, or generally opposite, directions. However, the body 424 and the lobes 426a and 426b may be integrally formed together from a material (e.g., rubber, styrene butadiene rubber, ethylene propylene diene monomer rubber) or a compound that includes one or more of the aforementioned materials. The phrase “integrally formed” refers to two or more structures formed together by the same material(s) and by the same process. For example, the body 424 and the lobes 426a and 426b may be formed by a molding operation (e.g., injection molding) or by a three-dimensional printing operation, as non-limiting examples.
The isolator 422 may include several openings, or through holes. For example, the isolator 422 may include an opening 432 designed to receive a structure (not shown in
The opening 432 may include a three-dimensional space that extends in either direction of a two-sided arrow 436a. Additionally, each of the openings 434a and the opening 434b may include a three-dimensional space that extends in either direction of a two-sided arrow 436b and a two-sided arrow 436c, respectively, with each of the two-sided arrows 436b and 436c extending in a different direction as compared to that of the two-sided arrow 436a. For example, the two-sided arrow 436a may be perpendicular with respect to each of the two-sided arrows 436b and 436c. In this regard, the opening 432 may be oriented in one direction (e.g., in the direction of the two-sided arrow 436a) and each of the openings 434a and 434b may be oriented in a different direction (e.g., in the direction of the two-sided arrow 436b and the two-sided arrow 436c, respectively). Accordingly, the opening 432 may be oriented perpendicular with respect to each of the openings 434a and 434b.
In one or more implementations, the isolator 422 is subject to torque that causes displacement (e.g., deflection) of the isolator 422. Alternatively, or in combination, the isolator 422 is subject to vibration from a vehicle. However, in either case, the isolator 422 can provide a counterforce, thus minimizing forces applied to the structure within the opening 432, as well as other structures coupled to the structure. This will be shown below. Further, the lobes 426a and 426b provide material, in addition to the material of the body 424, to further counter the forces applied to the structure within the opening 432, thereby allowing the isolator 422 to further counter displacement and/or vibration. Beneficially, users of a vehicle that includes the isolator assembly 420 may experience less vibration during operation of the vehicle.
The isolator assembly 420 may further include a cover 440a and a cover 440b. Based on their respective shapes, each of the covers 440a and 440b may be referred to as a clamshell cover. The covers 440a and 440b are designed to enclose, or at least partially enclose, the isolator 422. In this regard, each of the covers 440a and 440b includes a shape that conforms, or at least partially conforms, to the shape of the isolator 422. For example, the cover 440a may include a curved wall 442a with a curvature that conforms, or at least partially conforms, to the curvature of the curved surface 428 (e.g., curved cylindrical surface) of the isolator 422. Further, the cover 440a may include an extension 444a and an extension 444b (defining a set of extensions), with the extensions 444a and 444b conforming, or at least partially conforming, to the shape of the lobe 426a and the lobe 426b, respectively. Similarly, the cover 440b may include a curved wall 442b with a curvature that conforms, or at least partially conforms, to the curvature of the curved surface 428 of the isolator 422. Further, the cover 440b may include an extension 446a and an extension 446b (defining a set of extensions), with the extensions 446a and 446b conforming, or at least partially conforming, to the shape of the lobe 426a and the lobe 426b, respectively.
The extensions 444a, 444b, 446a, and 446b may include openings designed to align with the openings of the lobes 426a and 426b. For example, the extension 444a and the extension 444b include an opening 448a and an opening 448b, respectively, and the extension 446a and the extension 446b include an opening 450a and an opening 450b, respectively. When the respective openings of the lobes 426a and 426b, the extensions 444a and 444b, and the extensions 446a and 446b align, one or more structures may pass through the openings. For example, a bushing 452a, a bushing 452b, a bushing 452c, and a bushing 452d may pass through respective openings, as indicated by arrows. Each of the bushings 452a, 452b, 452c, and 452d may be referred to as a top hat bushing, as a non-limiting example.
Based in part on the respective curved walls and extensions, the covers 440a and 440b may constrain the isolator 422, including the body 424 and the lobes 426a and 426b along one direction (e.g., a Z-axis in Cartesian coordinates). Additionally, each of the cover 440a and the cover 440b includes a sidewall 454a and a sidewall 454b, respectively. The sidewall 454a and 454b may constrain the isolator 422, including the body 424 and the lobes 426a and 426b along another direction (e.g., a Y-axis in Cartesian coordinates). Thus, the covers 440a and 440b may constrain the isolator 422 in at least two different degrees.
Additionally, when the isolator assembly 420 is assembled, the respective openings (shown in
The dimensions of the bushings 452a, 452b, 452c, and 452d may be based in part on the dimensions of the lobes 426a and 426b. For example, the shaft 462a and the shaft 462c may include a dimension 466a and a dimension 466c, respectively, with the dimensions 466a and 466c being equal, or approximately equal. The dimensions 466a and 466c are selected such that, when the bushings 452a and 452c are interested into the opening 456a, the shafts 462a and 462c may contact each other and provide at least some compression, by the flange 460a and the flange 460c, to the lobe 426a. In this regard, the covers 440a and 440b may be separated by a gap to allow for the compression of the lobe 426a. Put another way, the covers 440a and 440b may not contact each other. It will be appreciated that the lobe 426b and the bushings 452b and 452d may include similar features and relationships as shown and/or described for the lobe 426a and the bushings 452a and 452c, respectively.
When in use, the isolator assembly 420 is designed to counter one or more forces, e.g., torque. In this regard, the isolator assembly 420 may limit or prevent transmission of the forces to a structure (not shown in
During operation, the drive unit 410 may provide a torque, in either direction of a two-sided arrow 477. Due in part to the isolator assembly 420 functioning as an intermediary device between the drive unit 410 and the frame rail 472, the torque provided by the drive unit 410 may applied to the isolator assembly 420. However, the isolator assembly 420, and in particular the isolator 422, may be displaced, while also providing a counterforce to counter, or at least partially counter, the torque applied by the drive unit 410. Additionally, the lobes 426a and 426b provide additional material to the isolator 422 that may be used to counter the applied torque, thus minimizing or prevent torque applied to the frame rail 472. Beneficially, the torque and associated effects (e.g., unwanted movement of the frame rail 472) of the torque are minimized or eliminated by the isolator assembly 420.
The body 724 may include several walls with voids, or spaces, between the walls. For example, the body 724 may include a wall 782a, a wall 782b, and a wall 782c, representative of additional walls in the body 724. The walls 782a, 782b, and 782c may be characterized has having several non-parallel portions, or diagonal portions. Also, the walls 782a, 782b, and 782c, may combine to surround the opening 732. In this regard, the opening 732 may be referred to as a central opening.
Further, a void 784, representative of several additional voids, may be formed in the body 724. As shown, the void 784 is positioned between the walls 782a and 782b, and accordingly, may be defined in part by the walls 782a and 782b. The void 784 may include an opening or space that does not include any material (e.g., materials used to form the isolator 722).
A force (e.g., torque, shear force) applied to the isolator 722 in either direction of a two-sided arrow 785 may cause movement of the wall 782a and/or the wall 782b. However, based on the void 784, each of the walls 782a and 782b can generally move freely within the body 724. Beneficially, the isolator 722 may undergo additional displacement based on the movement of the walls 782a and 782b, and the void 784 between the walls 782a and 782b. Further, the amount of force the isolator 722 can undergo may be defined in part by the thickness of each of the walls 782a and 782b. In this regard, the dimensions of the walls 782a and 782b may be adjusted and effectively tuned to counter a predetermined amount of force. By using formation methods such as three-dimensional printing (as a non-limiting example), the isolator 722 may be manufactured to counter a predetermined amount of force.
As used herein, the phrase “at least one of” preceding a series of items, with the term “and” or “or” to separate any of the items, modifies the list as a whole, rather than each member of the list (i.e., each item). The phrase “at least one of” does not require selection of at least one of each item listed; rather, the phrase allows a meaning that includes at least one of any one of the items, and/or at least one of any combination of the items, and/or at least one of each of the items. By way of example, the phrases “at least one of A, B, and C” or “at least one of A, B, or C” each refer to only A, only B, or only C; any combination of A, B, and C; and/or at least one of each of A, B, and C.
When an element is referred to herein as being “connected” or “coupled” to another element, it is to be understood that the elements can be directly connected to the other element, or have intervening elements present between the elements. In contrast, when an element is referred to as being “directly connected” or “directly coupled” to another element, it should be understood that no intervening elements are present in the “direct” connection between the elements. However, the existence of a direct connection does not exclude other connections, in which intervening elements may be present.
The predicate words “configured to”, “operable to”, and “programmed to” do not imply any particular tangible or intangible modification of a subject, but, rather, are intended to be used interchangeably. In one or more implementations, a processor configured to monitor and control an operation or a component may also mean the processor being programmed to monitor and control the operation or the processor being operable to monitor and control the operation. Likewise, a processor configured to execute code can be construed as a processor programmed to execute code or operable to execute code.
Phrases such as an aspect, the aspect, another aspect, some aspects, one or more aspects, an implementation, the implementation, another implementation, some implementations, one or more implementations, an embodiment, the embodiment, another embodiment, some embodiments, one or more embodiments, a configuration, the configuration, another configuration, some configurations, one or more configurations, the subject technology, the disclosure, the present disclosure, other variations thereof and alike are for convenience and do not imply that a disclosure relating to such phrase(s) is essential to the subject technology or that such disclosure applies to all configurations of the subject technology. A disclosure relating to such phrase(s) may apply to all configurations, or one or more configurations. A disclosure relating to such phrase(s) may provide one or more examples. A phrase such as an aspect or some aspects may refer to one or more aspects and vice versa, and this applies similarly to other foregoing phrases.
The word “exemplary” is used herein to mean “serving as an example, instance, or illustration”. Any embodiment described herein as “exemplary” or as an “example” is not necessarily to be construed as preferred or advantageous over other embodiments. Furthermore, to the extent that the term “include”, “have”, or the like is used in the description or the claims, such term is intended to be inclusive in a manner similar to the term “comprise” as “comprise” is interpreted when employed as a transitional word in a claim.
All structural and functional equivalents to the elements of the various aspects described throughout this disclosure that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims. Moreover, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is explicitly recited in the claims. No claim element is to be construed under the provisions of 35 U.S.C. § 112, sixth paragraph, unless the element is expressly recited using the phrase “means for” or, in the case of a method claim, the element is recited using the phrase “step for”.
The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects. Thus, the claims are not intended to be limited to the aspects shown herein, but are to be accorded the full scope consistent with the language claims, wherein reference to an element in the singular is not intended to mean “one and only one” unless specifically so stated, but rather “one or more”. Unless specifically stated otherwise, the term “some” refers to one or more. Pronouns in the masculine (e.g., his) include the feminine and neuter gender (e.g., her and its) and vice versa. Headings and subheadings, if any, are used for convenience only and do not limit the subject disclosure.