Control arm hydraulic bushing and vehicle

Abstract

The application provides a hydraulic bushing for a control arm and a vehicle, and belongs to the technical field of automobile parts. The hydraulic bushing for the control arm comprises an inner tube, an elastic body and an outer tube which are sequentially sleeved from inside to outside. The elastic body is provided with a liquid chamber extending along the circumference of the inner tube. The axial ends of the elastic body correspond to the end faces of the inner tube and form an annular transition zone. The axial ends of the outer tube correspond to the end faces of the inner tube and form an annular support part abutting outside the annular transition zone. The annular transition zone is used to reduce the radial stiffness of the hydraulic bushing, and the annular support part is used to ensure the axial stiffness of the hydraulic bushing. The vehicle comprises the hydraulic bushing for the control arm. The hydraulic bushing for the control arm and the vehicle can reduce the maintenance and replacement of parts and improve the comfort and experience of users on the basis of ensuring the durability of the vehicle.

Description

Technical Field

[0001] This application belongs to the field of automotive parts technology, and more specifically, relates to a hydraulic bushing for a control arm and a vehicle. Background Technology

[0002] Hydraulic bushings are an important component of the front suspension control arms of automobiles. When vibrations occur during vehicle operation, the fluid within the hydraulic chamber is compressed, absorbing and dispersing vibration energy through the flow and damping effect of the fluid, thus providing cushioning and vibration reduction. Generally speaking, the lower the stiffness of the hydraulic bushing in the direction of the fluid chamber, i.e., the lower the radial stiffness, the better the ride comfort. However, hydraulic bushings are also "softer," and excessively low stiffness can lead to excessive deformation of the hydraulic bushing under heavy loads, increasing the shear stress inside the hydraulic bushing and thus drastically shortening its fatigue life.

[0003] In existing technologies, the comfort and durability of hydraulic bushings are often balanced by controlling the ratio of static stiffness to axial stiffness of the hydraulic bushing chamber. The ratio of static stiffness to axial stiffness of the hydraulic bushing chamber is generally between 1.9 and 2.5. Although this ensures the durability of the hydraulic bushing, it also results in relatively high radial and axial stiffness, leading to poor user ride comfort and experience. Utility Model Content

[0004] The purpose of this application is to provide a hydraulic bushing for a control arm and a vehicle, which aims to solve the problem that the high radial stiffness of the hydraulic bushing results in poor user ride comfort and experience.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: In a first aspect, a hydraulic bushing for a control arm is provided, the hydraulic bushing for the control arm comprising an inner tube, an elastic body and an outer tube sequentially sleeved from the inside out; the elastic body is provided with a liquid chamber extending circumferentially along the inner tube. The axial ends of the elastic body extend through the two end faces of the inner tube and form an annular transition zone. The outer tube extends through both ends of the inner tube and forms an annular support portion that abuts against the outside of the annular transition zone. The annular transition zone is used to reduce the radial stiffness of the hydraulic bushing, and the annular support portion is used to ensure the axial stiffness of the hydraulic bushing.

[0006] Compared with the prior art, the solution shown in this application embodiment has an elastomer extending along the inner tube axially to form an annular transition zone. On the one hand, this increases the axial extension length of the elastomer and improves the elastic support foundation. On the other hand, the bottom of the annular transition zone is supported by the inner tube, and the extension end is detached from the inner tube support. This can further optimize the elastic softness of the hydraulic bushing, thereby reducing the radial stiffness ratio of the hydraulic bushing and providing good comfort for the vehicle. Furthermore, by extending the outer tube through the inner tube along with the elastic body and always supporting it on the outer edge of the elastic body, the axial stiffness of the hydraulic bushing can be effectively guaranteed, avoiding the problems of deformation and fatigue fracture caused by excessively low stiffness of the hydraulic bushing. In this application, the elastomer and the outer tube extend synchronously through the inner tube, which can reduce radial stiffness while ensuring axial stiffness requirements, thereby optimizing the radial-axial stiffness ratio of the hydraulic bushing. This improves the user's ride comfort and experience while ensuring the durability of the hydraulic bushing.

[0007] In one possible implementation, the annular transition region has an arc that is recessed toward the center of the elastomer, so that the annular transition region forms a U-shaped sinkhole.

[0008] By setting a U-shaped sinking groove in the annular transition zone, the radial stiffness of the elastomer in the annular transition zone is further reduced. Since the annular transition zone extends beyond the end face of the inner tube, it can compensate for the reduced axial stiffness at the sinking groove, thereby further reducing the radial stiffness while ensuring the required axial stiffness and optimizing the performance of the hydraulic bushing.

[0009] In some embodiments, of the two U-shaped sidewalls of the sinking trough, the side closer to the outer tube is defined as the first sidewall, and the side closer to the inner tube is defined as the second sidewall. The first sidewall extends obliquely from the bottom of the sinking trough toward the end face of the outer tube; the second sidewall extends obliquely from the bottom of the sinking trough toward the end face of the inner tube, and the extension length of the first sidewall is greater than the extension length of the second sidewall.

[0010] The first and second sidewalls extend at an angle, which can increase the radial extension width of the sinking trough in the inner tube, thereby further optimizing the radial stiffness ratio of the hydraulic bushing and improving the comfort and fatigue durability of the hydraulic bushing.

[0011] For example, the sinking trough is provided with multiple sets of reinforcing ribs spaced apart along the circumference of the inner tube, and the reinforcing ribs extend from the bottom of the sinking trough to the first side wall.

[0012] By setting reinforcing ribs, the support strength inside the sinking trough is enhanced, ensuring the support strength of the annular transition zone and meeting the stiffness requirements of the hydraulic bushing.

[0013] In some embodiments, the connecting end face between the second sidewall and the inner peripheral wall of the annular transition zone is defined as the first end face, and in the axial direction of the inner tube, the first end face is recessed between the two end faces of the inner tube.

[0014] By lowering the first end face between the two ends of the inner tube, a height difference can be formed between the inner periphery of the elastic body and the inner tube, thereby further reducing the radial static stiffness of the hydraulic bushing and improving user comfort.

[0015] In one possible implementation, the two axial end faces of the outer tube correspond to the axially extending end faces of the elastomer.

[0016] By extending the axial end face of the outer tube through the elastomer, the support strength of the outer tube around the hydraulic bushing can be enhanced, effectively ensuring the axial stiffness required during the use of the hydraulic bushing and guaranteeing the fatigue durability of the hydraulic bushing.

[0017] In one possible implementation, the elastomer includes: A rubber body is fitted over the outer side of the inner tube, and the two ends form the annular transition area; the outer circumferential surface of the rubber body is provided with an installation groove, which extends along the circumference of the rubber body; A flow channel plate is installed over the mounting groove and surrounds the liquid chamber between the flow channel plate and the rubber body; an inlet and an outlet are provided between the flow channel plate and the rubber body, and both the inlet and the outlet are connected to the liquid chamber; The outer tube is sleeved outside the flow channel plate, and both ends of the outer tube extend to abut against the outer peripheral wall of the rubber body in the annular transition zone to form the annular support portion.

[0018] In this application, a rubber body and a flow channel plate are set to form a liquid chamber, which facilitates the flow of liquid in the liquid chamber and forms damping. This allows the liquid flow and damping effect to absorb and disperse vibration energy, thereby achieving the effects of buffering and vibration reduction, and reducing the noise of the equipment during operation.

[0019] The outer tube is sleeved outside the flow channel plate, which can form a liquid backflow gap between the outer tube and the flow channel plate, or meet the sealing requirements of the flow channel groove on the flow channel plate; and the outer tube abuts against the outer peripheral wall of the rubber body of the annular transition zone to seal the flow path of the liquid in the hydraulic bushing in the axial direction of the inner tube and avoid liquid leakage.

[0020] The inlet and outlet are used to connect with the liquid chamber to form a channel for liquid flow, allowing the liquid to circulate between the liquid chamber and the flow channel plate, ensuring smooth liquid flow.

[0021] In some embodiments, there are two mounting slots, which are spaced apart and symmetrically arranged along the circumference of the inner tube; each mounting slot is covered with a set of flow channel plates, which correspondingly form the liquid chamber; each liquid chamber is provided with the liquid inlet and the liquid outlet.

[0022] By setting two mounting slots to form two sets of flow channel plates, on the one hand, the symmetry of the elastomer can be ensured and the support and alignment of the hydraulic bushing can be improved; on the other hand, if one set is blocked or has other problems, the liquid chamber at the other set of flow channel plates can always ensure the damping effect of the liquid.

[0023] For example, the rubber body is provided with two sets of baffles symmetrically in the radial direction, both sets of baffles are extended along the axial direction of the inner tube, and the two baffles separate the two mounting grooves; The liquid inlets of the two flow channel plates are connected at one of the sets of baffle portions; The liquid outlets of the two flow channel plates are disposed opposite to each other on both sides of another set of baffle portions, and buffer grooves are provided on both sides of the other set of baffle portions, with the buffer grooves facing the openings of the corresponding liquid outlets.

[0024] By connecting the inlets of the two liquid chambers, it is beneficial to achieve the connection of the liquid flow channels of the two liquid chambers and ensure the continuity of the liquid flow in the circumferential direction of the hydraulic bushing; by setting a buffer groove, the liquid is buffered and absorbed when it flows out of the outlet, reducing the vibration of the hydraulic bushing.

[0025] Secondly, embodiments of this application also provide a vehicle that includes the aforementioned hydraulic bushing for the control arm.

[0026] The vehicle provided in this application has all the beneficial effects of the aforementioned hydraulic bushing for the control arm because it includes the hydraulic bushing for the control arm. It can reduce the maintenance and replacement of parts while ensuring the durability of the vehicle and improve the user's riding comfort and experience. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A schematic diagram of the structure of the hydraulic bushing for the control arm provided in the embodiments of this application; Figure 2A cross-sectional structural schematic diagram of a hydraulic bushing for a control arm provided in an embodiment of this application; Figure 3 For the appendix Figure 2 Enlarged structural diagram at point A; Figure 4 A schematic diagram of the structure of the elastomer provided in the embodiments of this application. Figure 1 ; Figure 5 A schematic diagram of the structure of the elastomer provided in the embodiments of this application. Figure 2 ; Figure 6 This is a schematic diagram of the structure of the rubber body provided in the embodiments of this application; Figure 7 This is a schematic diagram of the structure of the middle tube provided in an embodiment of this application.

[0029] In the figure: 1. Inner tube; 2. Elastomer; 21. Rubber body; 211. Mounting groove; 212. Liquid chamber; 2121. Liquid inlet; 2122. Liquid outlet; 213. Baffle part; 2131. Buffer groove; 22. Flow channel plate; 221. Flow channel groove; 222. Connection port; 23. Annular transition area; 231. Sinking groove; 2311. First side wall; 2312. Second side wall; 2313. First end face; 232. Reinforcing rib; 24. Middle tube; 3. Outer tube; 31. Annular support part. Detailed Implementation

[0030] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0031] It should be noted that when an element is referred to as being "set on" another element, it can be directly on or indirectly on that other element. It should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0032] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0033] It should be noted that the orientation or positional relationship indicated by "inner" and "outer" in this embodiment is based on the orientation of the hydraulic bushing in the attached drawings. The "inner" side refers to the side facing the axis of the inner tube 1, and the "outer" side refers to the side away from the axis of the inner tube 1, or it can be understood as the side close to the outer peripheral wall of the outer tube 3.

[0034] It should be understood that the stiffness in the direction of the hydraulic chamber 212 of the hydraulic bushing used in this application actually refers to the static stiffness of the hydraulic chamber 212, which can also be understood as the radial stiffness or the radial static stiffness of the hydraulic bushing. Since the hydraulic chamber 212 on the hydraulic bushing is often formed by the radial cavity inside the elastic body 2, the stiffness in the direction of the hydraulic chamber 212 can also be understood as the radial stiffness of the hydraulic bushing. The circumferential stiffness of the hydraulic bushing used in this application can be understood as the stiffness of the hydraulic bushing on the axis of its inner tube 1. In addition, the radial-axial stiffness ratio of the hydraulic bushing referred to in this application can be understood as the ratio of the stiffness of the hydraulic bushing in the direction of the hydraulic chamber 212 to the axial stiffness of the hydraulic bushing, which is also equivalent to the ratio of the radial stiffness to the axial stiffness of the hydraulic bushing.

[0035] It should be noted that the radial stiffness of the control arm hydraulic bushing is related to the vehicle's NVH (Noise, Vibration and Harshness). The radial stiffness of the hydraulic bushing directly affects the user's riding experience and comfort. By reducing the radial stiffness of the hydraulic bushing, the hydraulic bushing can be made "softer," reducing noise and vibration, thereby improving the user's riding comfort.

[0036] Meanwhile, the axial stiffness of the hydraulic bushing directly affects the service life of the hydraulic bushing and the durability of the vehicle. The higher the axial stiffness of the hydraulic bushing, the better its durability, the better its fatigue resistance, and the longer its service life.

[0037] In the traditional way, the durability and comfort requirements of the hydraulic bushing are met by controlling the ratio of radial stiffness to axial stiffness. However, in order to ensure its axial stiffness, the static stiffness value of the hydraulic chamber 212 cannot be reduced, thus affecting the comfort of the ride.

[0038] Please refer to the following: Figures 1 to 7The hydraulic bushing for the control arm and the vehicle provided in this application will now be described. The hydraulic bushing for the control arm includes an inner tube 1, an elastic body 2, and an outer tube 3, which are sequentially sleeved from the inside out. The elastic body 2 is provided with a liquid chamber 212 extending circumferentially along the inner tube 1. The axial ends of the elastic body 2 extend through the end faces of the inner tube 1, forming an annular transition zone 23. The axial ends of the outer tube 3 extend through the end faces of the inner tube 1, forming an annular support portion 31 that abuts against the outside of the annular transition zone 23. The annular transition zone 23 is used to reduce the radial stiffness of the hydraulic bushing, and the annular support portion 31 is used to ensure the axial stiffness of the hydraulic bushing.

[0039] It is important to understand that stiffness is the external force required to cause a unit deformation in an object, and it is related to the object's material properties, geometry, boundary support, and the form of the external force. Simply put, for the same material, the greater the thickness of the cross-section, the greater the stiffness. It should be noted that many factors influence stiffness, and this application primarily modifies its shape, which can be simply understood as thickness being the main factor being changed.

[0040] In this application, both the elastomer 2 and the outer tube 3 extend beyond the inner tube 1, which is equivalent to reducing the thickness of the inner tube 1 in the radial direction of the hydraulic bushing. Therefore, the radial stiffness of the elastic bushing can be reduced. It should be understood that the inner tube 1 is often made of metal, which has greater stiffness than the elastomer 2. Therefore, the radial stiffness can be effectively reduced at the center of the annular transition zone 23, thereby reducing vibration and noise and improving the comfort of the user's vehicle.

[0041] Furthermore, the strong support and protection structure of the outer tube 3 forms an annular support part 31 outside the annular transition zone 23, which increases the thickness of both the elastomer 2 and the outer tube 3 in the axial direction of the inner tube 1. This helps to ensure the required height of the hydraulic bushing in the axial direction, thereby meeting its durability requirements.

[0042] Specifically, the inner tube 1 is made of extruded aluminum, which has a simple molding process, fine grain size, low internal stress, and good press-fit performance. At the same time, the inner tube 1 adopts a thin-walled structure design, which can reduce axial torsional stiffness, reduce axial torsional stress of rubber body 21, and improve product reliability.

[0043] Optionally, the outer tube 3 is made of extruded aluminum, which has a simple forming process and fine grain size and low internal stress, which is conducive to realizing the function of sealing liquid by flange closing. That is, by the contact between the outer tube 3 and the outer peripheral wall of the annular transition zone 23, the liquid in the liquid chamber 212 can be effectively intercepted to avoid liquid leakage and ensure the sealing effect.

[0044] It should be understood that the liquid chamber 212 in this application is disposed on the elastic body 2. Therefore, the elastic body 2 has a radially extending empty area that can be used to form a chamber for liquid flow. In addition, the liquid chamber 212 extends circumferentially along the inner tube 1 to achieve the buffering and vibration reduction effect of the hydraulic bushing at various positions in the circumferential direction.

[0045] It should be understood that the hydraulic bushing in this application is commonly used on the front suspension control arm of an automobile. Specifically, it can be understood that the hydraulic bushing is installed in the lower control arm assembly structure, and its installation position and connection method are existing technologies.

[0046] Compared with the prior art, the hydraulic bushing for the control arm provided in this application has an elastic body 2 extending axially along the inner tube 1 to form an annular transition zone 23. On the one hand, this increases the axial extension length of the elastic body 2 and improves the elastic support base. On the other hand, the bottom of the annular transition zone 23 is supported by the inner tube 1, and the extended end is detached from the inner tube 1 support. This can further optimize the elastic softness of the hydraulic bushing, thereby reducing the radial stiffness ratio of the hydraulic bushing and providing good comfort for the vehicle.

[0047] Furthermore, by extending the outer tube 3 along the elastic body 2 through the inner tube 1 and always supporting it on the outer edge of the elastic body 2, the axial stiffness of the hydraulic bushing can be effectively guaranteed, avoiding the problems of deformation and fatigue fracture caused by the low stiffness of the hydraulic bushing.

[0048] In this application, the elastomer 2 and the outer tube 3 extend synchronously through the inner tube 1, which can reduce radial stiffness while ensuring axial stiffness requirements, thereby optimizing the radial-axial stiffness ratio of the hydraulic bushing. This improves the user's ride comfort and experience while ensuring the durability of the hydraulic bushing.

[0049] For example, the annular transition zone 23 is an annular structure with equal axial height on both the inner and outer sides. In this case, the cross-section of the annular transition zone 23 is rectangular. The hydraulic bushing only reduces the thickness of the inner tube 1 in the radial direction, which can reduce its radial stiffness to a small extent.

[0050] For example, the annular transition zone 23 is an annular structure with an inner axial height lower than the outer axial height. In this case, the cross section of the annular transition zone 23 is a trapezoid with the short side facing inward. The hydraulic bushing not only reduces the thickness of the inner tube 1 in the radial direction, but also further reduces the thickness of the elastomer 2, which can further reduce its radial stiffness.

[0051] Optionally, within the trapezoidal annular transition zone 23 of the aforementioned horizontal interface, the inclined connecting surface that enables the connection between the inner and outer sides can be set to an arc shape. The specific protrusion or concavity of the arc shape can be selectively set according to actual needs.

[0052] For example, the annular transition zone 23 is an annular structure with an inner axial height of 0 and an outer axial height that is flush with the outer tube 3. In this case, the cross section of the annular transition zone 23 is triangular. The hydraulic bushing not only reduces the thickness of the inner tube 1 in the radial direction, but also further reduces the thickness of the elastomer 2, and can also reduce its radial stiffness.

[0053] Please see Figure 2 In some possible embodiments, the annular transition region 23 has an arc that is recessed toward the center of the elastomer 2, so that the annular transition region 23 forms a U-shaped sinkhole 231.

[0054] By setting a U-shaped sinking groove 231 in the annular transition zone 23, the radial stiffness of the elastomer 2 in the annular transition zone 23 is further reduced. Since the annular transition zone 23 extends through the end face of the inner tube 1, the annular transition zone 23 can compensate for the reduced axial stiffness at the sinking groove 231, so as to further reduce the radial stiffness while ensuring the axial stiffness requirement and optimize the performance of the hydraulic bushing.

[0055] It should be understood that the sinking groove 231 structure further optimizes the shape of the annular transition zone 23; by further setting the sinking groove 231 in the annular transition zone 23, the thickness of the annular transition zone 23 in the radial direction of the elastic body 2 can be further reduced, so as to further reduce the radial stiffness of the hydraulic bushing and improve the comfort of the user riding in the vehicle.

[0056] Specifically, the opening of the U-shaped sinking trough 231 is outward along the axial direction of the inner tube 1; optionally, the bottom of the U-shaped trough can be of equal height or can be set outward along the radial direction of the inner tube 1. Specifically, the bottom structure of the sinking trough 231 can be selectively set according to actual needs.

[0057] Please see Figure 3 In some embodiments, among the two U-shaped sidewalls of the sinking trough 231, the side closer to the outer tube 3 is defined as the first sidewall 2311, and the side closer to the inner tube 1 is defined as the second sidewall 2312; wherein, the first sidewall 2311 extends obliquely from the bottom of the sinking trough 231 toward the end face of the outer tube 3; the second sidewall 2312 extends obliquely from the bottom of the sinking trough 231 toward the end face of the inner tube 1, and the extension length of the first sidewall 2311 is greater than the extension length of the second sidewall 2312.

[0058] Optionally, in the axial direction of the inner tube 1, the first sidewall 2311 and the second sidewall 2312 of the sinking groove 231 are of equal length; or, in the axial direction of the inner tube 1, the length of the first sidewall 2311 of the sinking groove 231 is greater than the length of the first sidewall 2311.

[0059] Specifically, the first sidewall 2311 and the second sidewall 2312 extend at an angle, which can increase the radial extension width of the sinking groove 231 in the inner tube 1, thereby further optimizing the radial stiffness ratio of the hydraulic bushing and improving the comfort and fatigue durability of the hydraulic bushing.

[0060] Furthermore, in the axial direction of the inner tube 1, when the length of the first sidewall 2311 of the sinking groove 231 is greater than the length of the second sidewall 2312, the extension length of the first sidewall 2311 is greater than the extension length of the second sidewall 2312. This allows the thickness of the elastic body 2 in the direction near the outer tube 3 to be greater than the thickness of the elastic body 2 on the side near the inner tube 1, which is beneficial to reduce the overall radial stiffness of the elastic body 2 and improve the comfort of the vehicle.

[0061] Optionally, when the inclination angle of the first sidewall 2311 and the second sidewall 2312 reaches a preset angle, the first sidewall 2311 and the second sidewall 2312 intersect at the bottom of the sinking trough 231. At this time, the bottom of the sinking trough 231 is an annular edge line, and the first sidewall 2311 and the second sidewall 2312 of the sinking trough 231 extend in an inclined direction away from each other.

[0062] Optionally, the inclination angles of the first sidewall 2311 and the second sidewall 2312 are not equal; and the inclination angle of the first sidewall 2311 is greater than the inclination angle of the second sidewall 2312; the asymmetrical inclination extension design can better adjust the radial stiffness, so that the hydraulic bushing achieves a better balance between comfort and durability.

[0063] Please see Figure 1 or Figure 2 For example, the sinking trough 231 is provided with a plurality of reinforcing ribs 232 spaced apart along the circumference of the inner tube 1, and the reinforcing ribs 232 extend from the bottom of the sinking trough 231 to the first side wall 2311.

[0064] By setting reinforcing ribs 232, the support strength inside the sinking trough 231 is enhanced, the support strength of the annular transition zone 23 is guaranteed, the stiffness requirements of the hydraulic bushing are met, and other performance problems caused by reduced stiffness are prevented.

[0065] Optionally, two sets of support ribs are provided in the sinking trough 231. The two sets of support ribs are respectively arranged on the axial direction of the baffle part 213 of the rubber body 21 to enhance the support strength of the annular transition zone 23 and ensure the support strength of both ends of the elastic body 2.

[0066] Specifically, the support ribs protrude upwards from the bottom of the sinking groove 231, and the support ribs protrude to be flush with the outer end face of the rubber body 21, so as to divide the sinking groove 231 into two adjacent sections.

[0067] Furthermore, the aforementioned multiple sets of reinforcing ribs 232 are symmetrically distributed between the two sets of supporting ribs, and the multiple sets of reinforcing ribs 232 are equally spaced between the two sets of supporting ribs; that is, multiple sets of reinforcing ribs 232 are spaced apart in each section of the sinking trough 231.

[0068] Specifically, the reinforcing rib 232 is a protruding structure that protrudes into the sinking groove 231 from the bottom or side wall of the sinking groove 231; preferably, the reinforcing rib 232 is an integral structure with the rubber body 21.

[0069] Please see Figure 3 In some embodiments, the connection end face between the second sidewall 2312 and the inner peripheral wall of the annular transition area 23 is defined as the first end face 2313. In the axial direction of the inner tube 1, the first end face 2313 sinks between the two end faces of the inner tube 1.

[0070] It should be understood that there is a certain thickness between the second side wall 2312 and the inner peripheral wall of the annular transition area 23, which is close to the inner peripheral wall of the inner tube 1. Therefore, a connecting end face should be formed between the second side wall 2312 and the inner peripheral wall of the annular transition area 23, and the connecting end face is perpendicular to the inner peripheral wall of the annular transition area 23.

[0071] The design of the recessed first end face 2313 further optimizes the structure of the annular transition zone 23, which helps to better achieve the effect of reducing radial stiffness, thereby improving the overall vehicle comfort. Specifically, by recessing the first end face 2313 between the two end faces of the inner tube 1, a height difference can be formed between the inner circumference of the elastomer 2 and the inner tube 1, so as to further reduce the radial static stiffness of the hydraulic bushing and improve user comfort.

[0072] It should be understood that, in the axial direction of the inner tube 1, the first end face 2313 sinks between the two end faces of the inner tube 1, which can realize the sinking of the inner side of the elastic body 2 relative to the inner tube 1, thereby further reducing the radial thickness of the inner side of the elastic body 2, and further reducing the radial stiffness of the hydraulic bushing.

[0073] Please see Figure 3 In some possible embodiments, the two axial ends of the outer tube 3 correspond to the axially extending end faces of the elastomer 2.

[0074] By extending the axial end face of the outer tube 3 through the elastic body 2, the support strength of the outer tube 3 around the hydraulic bushing can be enhanced, effectively ensuring the axial stiffness required during the use of the hydraulic bushing and ensuring the fatigue durability of the hydraulic bushing.

[0075] It should be understood that during the use of the hydraulic bushing, if the elastomer 2 is exposed outside the outer tube, its excellent vibration absorption and noise reduction properties make the exposed portion susceptible to damage under centrifugal force. In this application, extending the outer tube 3 beyond the end face of the elastomer 2 also protects the edges of the elastomer 2, preventing damage. Therefore, the aforementioned extension of the outer tube 3 ensures the effective support range of the outer tube 3 for the elastomer 2, enhances the overall stability of the hydraulic bushing, helps maintain axial stiffness, and ensures the vehicle's handling stability during operation.

[0076] Preferably, the annular support portion 31 of the outer tube 3 has a slope that is inclined towards the inner tube 1, so that the annular support portion 31 is pressed against the outer peripheral wall of the elastic body 2, thereby ensuring the tightness of the connection between the outer tube 3 and the elastic body 2, avoiding liquid leakage, and ensuring the sealing effect.

[0077] Furthermore, the two ends of the outer tube 3 have equal axial extension lengths to ensure the symmetry of the two ends of the hydraulic bushing and improve the overall alignment performance of the hydraulic bushing.

[0078] Please refer to the figure. Figure 4 In some possible embodiments, the elastomer 2 includes a rubber body 21 and a flow channel plate 22; the rubber body 21 is sleeved on the outside of the inner tube 1, and an annular transition area 23 is formed at both ends; an installation groove 211 is provided on the outer peripheral surface of the rubber body 21 away from the inner tube 1, and the installation groove 211 extends along the circumference of the rubber body 21; the flow channel plate 22 covers the installation groove 211 and surrounds the liquid outlet chamber 212 between the flow channel plate 22 and the rubber body 21; an inlet 2121 and an outlet 2122 are provided between the flow channel plate 22 and the rubber body 21, and both the inlet 2121 and the outlet 2122 are connected to the liquid chamber 212; wherein, the outer tube 3 is sleeved on the outside of the flow channel plate 22, and both ends of the outer tube 3 extend to abut against the outer peripheral wall of the rubber body 21 in the annular transition area 23 to form an annular support portion 31.

[0079] It should be understood that the structure of the elastomer 2, consisting of a rubber body 21 and a flow channel plate 22, not only ensures the proper arrangement of the liquid chamber 212, but also achieves the buffering and vibration reduction function of the hydraulic bushing through the cooperation of the rubber body 21 and the flow channel plate 22. At the same time, the annular support 31 ensures axial stiffness.

[0080] In this application, a rubber body 21 and a flow channel plate 22 are provided to form a liquid chamber 212, which facilitates the flow of liquid in the liquid chamber 212 to form damping. This allows the liquid flow and damping effect to absorb and disperse vibration energy, thereby achieving the effects of buffering and vibration reduction, and reducing the noise of the equipment during operation.

[0081] The outer tube 3 is sleeved outside the flow channel plate 22, which can form a liquid backflow gap between the outer tube 3 and the flow channel plate 22, or meet the sealing requirements of the flow channel groove 221 on the flow channel plate 22; and the outer tube 3 abuts against the outer peripheral wall of the rubber body 21 of the annular transition area 23 to seal the flow path of the liquid in the hydraulic bushing in the axial direction of the inner tube 1 and avoid liquid leakage.

[0082] The inlet 2121 and outlet 2122 are used to communicate with the liquid chamber 212 to form a channel for liquid flow, so that the liquid circulates between the liquid chamber 212 and the flow channel plate 22, ensuring the smooth flow of liquid.

[0083] It should be understood that each flow channel plate 22 is provided with a flow channel groove 221 extending circumferentially along the rubber body 21, and the liquid inlet 2121 is connected to the flow channel groove 221.

[0084] Specifically, the flow channel groove 221 is located on the side of the flow channel plate 22 facing the outer tube 3, and extends from the liquid inlet 2121 along the inner circumferential wall of the outer tube 3 to the other end of the flow channel plate 22, and then rotates back to below the liquid inlet 2121. Optionally, after rotating back to below the liquid inlet 2121, the flow channel groove 221 can rotate back to the end away from the liquid inlet 2121. Specifically, the number of rotations of the flow channel groove 221 can be reasonably set according to the axial length of the flow channel plate 22. Furthermore, the liquid inlet 2121 and the liquid outlet 2122 are respectively located at both ends of the flow channel plate 22 along the circumference of the inner tube 1.

[0085] Furthermore, an annular boss is provided on the outer peripheral wall of the rubber body 21, and the annular boss is located in the annular transition area 23. The annular support part 31 of the outer tube 3 abuts against the outer peripheral wall of the annular transition area 23 and forms an interference fit structure with the aforementioned boss, so that the inner peripheral wall of the outer appearance abuts against the outer peripheral wall of the annular transition area 23.

[0086] It should be noted that the rubber body 21 in this application includes a central tube 24 and a rubber structure formed on the inner and outer walls of the central tube 24. The central tube 24 is used to enhance the supporting strength of the rubber body 21. It should be understood that the molding principle and method of the central tube 24 and the rubber structure are existing technologies and will not be described in detail here.

[0087] Specifically, the middle tube 24 is formed by stamping, and optionally, the middle tube 24 is made of 20# steel. The middle tube 24 has concave structures on both sides. These concave structures are used to create space for the valve flow channel design of the liquid chamber 212, so as to facilitate the inward indentation on the outer peripheral wall of the rubber body 21 to form the liquid chamber 212, while improving the rigidity of the rubber body 21 and providing support performance for the hydraulic bushing.

[0088] Please see Figures 4 to 6In some embodiments, there are two mounting slots 211, which are spaced apart and symmetrically arranged along the circumference of the inner tube 1; each mounting slot 211 is covered with a set of flow channel plates 22, and a liquid chamber 212 is formed accordingly; each liquid chamber 212 is provided with an inlet 2121 and an outlet 2122.

[0089] By setting two mounting slots 211 to form two sets of flow channel plates 22, on the one hand, the symmetry of the elastomer 2 can be guaranteed and the support and alignment of the hydraulic bushing can be improved; on the other hand, if one set is blocked or has other problems, the liquid chamber 212 at the other set of flow channel plates 22 can always guarantee the damping effect of the liquid.

[0090] It is important to understand that the symmetrical arrangement of the two liquid chambers 212 design allows the hydraulic bushing to be subjected to more even force during operation, which can more effectively absorb and disperse vibration energy, further improve the buffering and vibration reduction effect, and thus improve the user's riding comfort.

[0091] Optionally, the two liquid chambers 212 are connected to ensure the axial conduction of liquid in the rubber body 21.

[0092] Each flow channel plate 22 is provided with a corresponding flow channel groove 221. Optionally, the two liquid chambers 212 are interconnected through the flow channel groove 221.

[0093] Please see Figure 4 and Figure 5 For example, the rubber body 21 is provided with two sets of baffle portions 213 symmetrically along the radial direction. Both sets of baffle portions 213 extend along the axial direction of the inner tube 1, and the two baffle portions 213 separate the two mounting grooves 211. The liquid inlets 2121 of the two flow channel plates 22 are connected at one set of baffle portions 213. The liquid outlets 2122 of the two flow channel plates 22 are arranged opposite to each other on both sides of the other set of baffle portions 213, and buffer grooves 2131 are provided on both sides of the other set of baffle portions 213. The buffer grooves 2131 are opposite to the openings of the corresponding side liquid outlets 2122.

[0094] Specifically, the mounting groove 211 is recessed inward toward the inner tube 1 on the outer peripheral wall of the rubber body 21. When there are two mounting grooves 211, the baffle portion 213 is formed between the two adjacent ends of the two mounting grooves 211 in the circumferential direction of the rubber body 21. It can be understood that the two baffle portions 213 separate the two mounting grooves 211 so as to install two sets of flow channel plates 22 respectively.

[0095] It should be understood that the inlets 2121 of the two flow channel plates 22 are connected at one of the baffle portions 213. Specifically, each flow channel plate 22 is provided with a flow channel groove 221. One end of the flow channel groove 221 is connected to the inlet 2121, and the other end forms a connection port 222. The connection ports 222 on the two flow channel plates 22 are connected to each other at the baffle portion 213, so that the flow channel grooves 221 on the two flow channel plates 22 are connected at the baffle portion 213, thereby allowing the inlets 2121 of the two flow channel plates 22 to be connected to each other at the baffle portion 213.

[0096] Specifically, a relief groove is provided on one of the baffle portions 213. The relief groove extends through both ends of the baffle portion 213 along the circumference of the rubber body 21, and the connection port 222 of the flow channel 221 extends to the relief groove, thereby connecting the connection ports 222 of the two flow channel 221 to each other.

[0097] By connecting the inlets 2121 of the two liquid chambers 212 to each other, it is beneficial to achieve the connection of the liquid flow channels of the two liquid chambers 212 and ensure the continuity of the liquid flow in the circumferential direction of the hydraulic bushing. By setting the buffer groove 2131, the liquid is buffered and absorbed when it flows out of the outlet 2122, thereby reducing the vibration of the hydraulic bushing.

[0098] Specifically, the number of buffer grooves 2131 can be selectively set according to actual needs.

[0099] It should be understood that the recessed opening of the buffer groove 2131 faces the corresponding liquid outlet 2122. Therefore, the liquid discharged from the liquid outlet 2122 will impact and enter the buffer groove 2131 under the action of inertia, so as to buffer and absorb vibration through the buffer groove 2131 and reduce impact noise.

[0100] In addition, a buffer groove 2131 structure will be added to the baffle part 213 to improve the softness of the rubber body 21 and at the same time realize the rapid pressure relief flow of the damping fluid at the outlet 2122, thereby improving the durability of the hydraulic bushing.

[0101] Based on the same inventive concept, this application also provides a vehicle that includes the aforementioned hydraulic bushing for the control arm.

[0102] The vehicle provided in this application has all the beneficial effects of the aforementioned hydraulic bushing for the control arm because it includes the hydraulic bushing for the control arm. It can reduce the maintenance and replacement of parts while ensuring the durability of the vehicle and improve the user's riding comfort and experience.

[0103] Specifically, by adopting the hydraulic bushing for the control arm provided in the above embodiments of this application, the vehicle can better absorb and disperse vibration energy during driving, effectively improving ride comfort and handling stability, reducing wear of parts caused by vibration, and improving the overall performance and reliability of the vehicle.

[0104] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A hydraulic bushing for control arms, characterized by, The hydraulic bushing for the control arm includes an inner tube (1), an elastic body (2), and an outer tube (3) that are sequentially sleeved from the inside to the outside; the elastic body (2) is provided with a liquid chamber (212) extending circumferentially along the inner tube (1); The axial ends of the elastic body (2) extend through the two end faces of the inner tube (1) respectively, forming an annular transition zone (23); The two ends of the outer tube (3) extend through the two end faces of the inner tube (1) and form an annular support (31) that abuts against the outside of the annular transition zone (23). The annular transition zone (23) is used to reduce the radial stiffness of the hydraulic bushing, and the annular support (31) is used to ensure the axial stiffness of the hydraulic bushing.

2. The control arm hydraulic bushing of claim 1, wherein, The annular transition zone (23) has an arc that is recessed toward the center of the elastic body (2) so that the annular transition zone (23) forms a U-shaped sinkhole (231).

3. The control arm hydraulic bushing of claim 2, wherein, In the two U-shaped sidewalls of the sinking trough (231), the side closer to the outer tube (3) is defined as the first sidewall (2311), and the side closer to the inner tube (1) is defined as the second sidewall (2312). The first sidewall (2311) extends obliquely from the bottom of the sinking trough (231) toward the end face of the outer tube (3); the second sidewall (2312) extends obliquely from the bottom of the sinking trough (231) toward the end face of the inner tube (1), and the extension length of the first sidewall (2311) is greater than the extension length of the second sidewall (2312).

4. The control arm hydraulic bushing of claim 3, wherein, The sinking trough (231) is provided with multiple sets of reinforcing ribs (232) spaced apart along the circumference of the inner tube (1). The reinforcing ribs (232) extend from the bottom of the sinking trough (231) to the first side wall (2311).

5. The control arm hydraulic bushing according to claim 3 or 4, characterized in that The connection end face between the second sidewall (2312) and the inner peripheral wall of the annular transition area (23) is defined as the first end face (2313). In the axial direction of the inner tube (1), the first end face (2313) sinks between the two end faces of the inner tube (1).

6. The control arm hydraulic bushing of claim 1, wherein, The two axial ends of the outer tube (3) extend through the axial extension end face of the elastic body (2).

7. The hydraulic bushing for the control arm as described in claim 1, characterized in that, The elastomer (2) comprises: A rubber body (21) is fitted outside the inner tube (1), and the two ends form the annular transition area (23); the outer circumferential surface of the rubber body (21) is provided with an installation groove (211), which extends along the circumferential direction of the rubber body (21); A flow channel plate (22) is installed over the mounting groove (211) and surrounds the liquid chamber (212) between the flow channel plate (22) and the rubber body (21); an inlet (2121) and an outlet (2122) are provided between the flow channel plate (22) and the rubber body (21), and both the inlet (2121) and the outlet (2122) are connected to the liquid chamber (212); The outer tube (3) is sleeved outside the flow channel plate (22), and both ends of the outer tube (3) extend to abut against the outer peripheral wall of the rubber body (21) of the annular transition area (23) to form the annular support part (31).

8. The hydraulic bushing for the control arm as described in claim 7, characterized in that, Two mounting slots (211) are provided, and the two mounting slots (211) are symmetrically arranged and spaced apart along the circumference of the inner tube (1); a set of flow channel plates (22) are provided at each mounting slot (211), and a liquid chamber (212) is formed accordingly; each liquid chamber (212) is provided with a liquid inlet (2121) and a liquid outlet (2122).

9. The hydraulic bushing for the control arm as described in claim 8, characterized in that, The rubber body (21) is provided with two sets of baffles (213) symmetrically arranged in the radial direction. Both sets of baffles (213) extend along the axial direction of the inner tube (1), and the two baffles (213) separate the two mounting grooves (211). The liquid inlets (2121) of the two flow channel plates (22) are connected at one of the sets of baffle portions (213); The outlets (2122) of the two flow channel plates (22) are disposed opposite to each other on both sides of another set of baffle portions (213), and both sides of the other set of baffle portions (213) are provided with buffer grooves (2131), and the buffer grooves (2131) are opposite to the openings of the outlets (2122) on the corresponding sides.

10. A vehicle, characterized in that, Includes the hydraulic bushing for the control arm as described in any one of claims 1-9.

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