Hydraulic bushing for vehicle body suspension

Abstract

The invention provides a hydraulic bushing for vehicle body suspension. The hydraulic bushing comprises an upper soft cushion and a lower soft cushion, the upper soft cushion and the lower soft cushion are connected in an up-down matched mode, the lower soft cushion comprises a main spring assembly, the main spring assembly comprises a first cavity, a second cavity and a runner, the first cavity and the second cavity are different in rigidity, the runner is communicated with the first cavity and the second cavity, the first cavity and the second cavity are sequentially arranged in the axial direction of the main spring assembly, the first cavity is arranged on the upper side of the second cavity, the first cavity serves as a working cavity to participate in stress, and the second cavity serves as a working cavity to participate in stress. The first cavity, the second cavity and the flow channel are filled with liquid, and the liquid flows in the first cavity, the second cavity and the flow channel through positive pressure or negative pressure formed by stress of the first cavity. The first cavity is a single working cavity, and the second cavity and the flow channel between the first cavity and the second cavity are arranged, so that high damping and high dynamic stiffness are provided for a vehicle body when the vehicle body is at low frequency and large amplitude; under the conditions of high frequency and small amplitude, low damping and low dynamic stiffness are provided, good vibration isolation and noise reduction performance is provided in multiple scenes, a small dynamic-static ratio can be provided, and the NVH comfort of the whole vehicle is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle body suspension, and in particular to a hydraulic bushing for vehicle body suspension. Background Art

[0002] The body suspension is one of the important components that must be used in the automobile chassis. Its main function is to be installed on the frame to bear the load transmitted by the body and isolate the vibration from the road, thereby enhancing the comfort of the entire vehicle.

[0003] In the prior art, most frame bushings adopt a pure rubber structure. Under the excitation of low-frequency and large-amplitude from the road surface, the pure rubber body suspension cannot effectively attenuate the vibration, which will affect the driving comfort.

[0004] Chinese patent CN201410094113.2 discloses a hydraulic bushing and a vehicle used in a guide device of a vehicle suspension system, comprising: an inner tube; a main rubber body wrapped around the outer edge of the inner tube; at least one inner frame arranged in the middle of the main rubber body and fixedly connected to the main rubber body; a first and a second flow channel plate arranged outside the main rubber body; a first liquid chamber formed between the main rubber body and the first flow channel plate and a second liquid chamber formed between the main rubber body and the second flow channel plate; a liquid channel groove arranged between the first liquid chamber and the second liquid chamber and conducting the flow of viscous liquid in the two; and the first liquid chamber, the second liquid chamber and the liquid channel groove are filled with viscous liquid. The hydraulic bushing of the invention occupies a small space. However, the two liquid chambers in the bushing are both working chambers. When working, both are subjected to force at the same time. When subjected to high-frequency excitation, both exhibit high stiffness and low damping dynamic characteristics at the same time, which is not conducive to vibration reduction and noise reduction of the whole vehicle, and its overall dynamic and static ratio is relatively high, affecting the NVH performance of the whole vehicle. Summary of the invention

[0005] The technical problem solved by the present invention is that the two liquid chambers in the hydraulic bushing in the prior art are both working chambers, and both are subjected to force at the same time. When subjected to high-frequency excitation, both exhibit dynamic characteristics of high stiffness and low damping, which is not conducive to vibration reduction and noise reduction of the entire vehicle.

[0006] The present invention provides a hydraulic bushing for vehicle body suspension, comprising:

[0007] Upper cushion;

[0008] Lower cushion; the upper cushion is connected with the lower cushion at the upper and lower parts, the lower cushion includes a main spring assembly, the main spring assembly includes cavity one and cavity two with different stiffnesses, and a flow channel connecting cavity one and cavity two, cavity one and cavity two are arranged in sequence along the axial direction of the main spring assembly, cavity one is arranged on the upper side of cavity two, cavity one is a working chamber participating in force, cavity one, cavity two and the flow channel are filled with liquid, and the liquid flows in cavity one, cavity two and the flow channel through the positive pressure or negative pressure formed by the force of cavity one.

[0009] Furthermore, the main spring assembly includes a vulcanized part one, a vulcanized part two and a vulcanized part three. The vulcanized part one and the vulcanized part two are assembled together to form a cavity one and a cavity two which are separated from each other. A flow channel is formed on the periphery of the vulcanized part two and the vulcanized part three, and the flow channel is used to connect the cavity one and the cavity two.

[0010] Furthermore, the vulcanized part 1 includes an inner tube 1, a skeleton 1 and a rubber 1. The skeleton 1 is an annular structure and is sleeved on the outer side of the inner tube 1. The rubber 1 is used to connect the inner tube 1 and the skeleton 1.

[0011] Furthermore, the vulcanized part 1 is also formed with a partition, and the vulcanized part 2 and the vulcanized part 3 are respectively mounted on the vulcanized part 1 at the upper and lower ends of the partition; a cavity 1 is formed between the vulcanized part 1 and the vulcanized part 2, and a cavity 2 is formed between the vulcanized part 1 and the vulcanized part 3.

[0012] Furthermore, the rubber 1 includes a tube body bonding rubber 1, a connecting rubber 1, and a skeleton bonding rubber 1. The tube body bonding rubber 1 is used to connect with the inner tube 1, the skeleton 1 is arranged inside the skeleton bonding rubber 1, and the connecting rubber 1 is used to connect the tube body bonding rubber 1 and the skeleton bonding rubber 1.

[0013] Furthermore, the connecting rubber 1 cooperates with the partition to separate the cavity 1 and the cavity 2.

[0014] Furthermore, the vulcanized part 2 includes a skeleton 2, a flow channel skeleton 1 and a rubber 2, the flow channel skeleton 1 is arranged on the outer peripheral side of the skeleton 2, the rubber 2 is used to connect the skeleton 2 and the flow channel skeleton 1, and a flow channel 1 is formed on the outer periphery of the flow channel skeleton 1, and the channel 1 is connected to the cavity 1.

[0015] Furthermore, the rubber 2 includes a tube body bonding rubber 2, a connecting rubber 2, and a skeleton bonding rubber 2. The tube body bonding rubber 2 is used to connect with the skeleton 2. The skeleton bonding rubber 2 at least partially covers the flow channel skeleton 1. The connecting rubber 2 is used to connect the tube body bonding rubber 2 and the skeleton bonding rubber 2.

[0016] Furthermore, the vulcanized part three includes a skeleton three, a flow channel skeleton two and a rubber three, the flow channel skeleton two is arranged on the outer peripheral side of the skeleton three, the rubber three is used to connect the skeleton three and the flow channel skeleton two, and a flow channel two is formed on the outer periphery of the flow channel skeleton two, and the channel two is respectively connected to the channel one and the cavity two.

[0017] Furthermore, the rubber three includes tube body bonding rubber three, connecting rubber three, and skeleton bonding rubber three. The tube body bonding rubber three is used to connect with skeleton three. The skeleton bonding rubber three at least partially covers the flow channel skeleton two. The connecting rubber three is used to connect the tube body bonding rubber three and the skeleton bonding rubber three.

[0018] Furthermore, a liquid inlet connected to the flow channel is provided at the bottom end of the third vulcanized component, and the liquid inlet is used to fill liquid into the first cavity, the flow channel and the second cavity.

[0019] Furthermore, the lower cushion also includes a lower cushion inner tube and a lower cushion bracket, the lower cushion inner tube is sleeved on the outer circumference of the main spring assembly, the lower cushion bracket is sleeved on the outer circumference of the lower cushion inner tube, and the lower cushion inner tube cooperates with the outer circumference of the main spring assembly to form a flow channel.

[0020] Furthermore, it also includes a limiting pad, which is arranged on a side of the lower cushion away from the upper cushion.

[0021] Furthermore, the limiting pad includes a limiting frame and a limiting rubber, and the limiting rubber is arranged on a side of the limiting frame close to the lower soft pad.

[0022] Furthermore, the upper cushion includes an upper cushion inner tube, an upper cushion bracket and an upper cushion rubber, the upper cushion bracket is sleeved on the outside of the upper cushion inner tube, the upper cushion rubber is used to connect the upper cushion inner tube and the upper cushion bracket, and the upper cushion inner tube is connected to the lower cushion.

[0023] Furthermore, the upper cushion inner tube includes an upper cushion tube body and an inner tube upper cover, the inner tube upper cover is arranged at one end of the upper cushion tube body away from the lower cushion, and extends outward along the radial outer circumference of the upper cushion tube body; the upper cushion bracket includes a bracket folded edge and a bracket tube wall, the bracket tube wall is sleeved on the outer side of the upper cushion tube body, the bracket folded edge is arranged on the bracket tube wall near one end of the inner tube upper cover, and the bracket folded edge is used to cooperate with the inner tube upper cover to limit the deformation of the upper cushion rubber.

[0024] Furthermore, an upper cushion limiting frame is sleeved on one end of the upper cushion inner tube close to the lower cushion, the upper cushion limiting frame is arranged between the upper cushion bracket and the upper cushion inner tube, and the upper cushion limiting frame is interference fit with the upper cushion inner tube.

[0025] Compared with the prior art, the hydraulic bushing for vehicle body suspension of the present invention has the following advantages:

[0026] (1) The present invention provides a single working chamber (i.e., only chamber one participates in the force-bearing work), a liquid storage chamber (chamber two), and a flow channel therebetween, so that the vehicle body provided with the hydraulic bushing can provide high damping and high dynamic stiffness when encountering low frequency and large amplitude conditions; and can provide low damping and low dynamic stiffness when encountering high frequency and small amplitude conditions. While providing good vibration isolation and noise reduction performance in multiple scenarios, it can also provide a smaller dynamic-static ratio, so that the system can provide balanced performance in various states, which greatly contributes to the improvement of NVH.

[0027] (2) The present invention sets the cavity 1 and the cavity 2 in different sizes so that the two have different rigidities. The pressures formed by the liquids in the two cavities after being subjected to different forces are different, so that the liquids can move in the two chambers and the flow channel, thereby playing a role in reducing vibration and noise.

[0028] (3) The present invention configures the lower cushion as a combination of vulcanized part 1, vulcanized part 2, and vulcanized part 3, so that the rubber part in the lower cushion has better elastic deformation performance, and has a better fatigue life than the traditional hydraulic bushing;

[0029] (4) The present invention reduces the structure of the flow channel plate in the hydraulic bushing by forming the flow channel on the frame, thereby increasing the product's adjustable space, reducing the number of parts, saving costs, and improving part performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0031] Figure 1 It is an overall schematic diagram of a hydraulic bushing in an embodiment of the present invention;

[0032] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the hydraulic bushing according to an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the three-dimensional structure of the upper cushion according to an embodiment of the present invention;

[0034] Figure 4 is a schematic cross-sectional structural diagram of the upper cushion according to an embodiment of the present invention;

[0035] Figure 5 It is a schematic diagram of the three-dimensional structure of the lower cushion according to the embodiment of the present invention;

[0036] Figure 6 is a schematic cross-sectional view of a lower cushion according to an embodiment of the present invention;

[0037] Figure 7It is a schematic diagram of the three-dimensional structure of the main spring assembly according to an embodiment of the present invention;

[0038] Figure 8 It is a schematic diagram of the three-dimensional structure of the main spring assembly according to the embodiment of the present invention from another angle;

[0039] Fig. 9 It is a schematic diagram of the three-dimensional structure of the vulcanized part 1 according to an embodiment of the present invention;

[0040] Fig.10 It is a schematic cross-sectional structural diagram of a vulcanized component 1 according to an embodiment of the present invention;

[0041] Fig.11 It is a schematic diagram of the three-dimensional structure of the vulcanized part 2 according to an embodiment of the present invention;

[0042] Fig.12 It is a schematic cross-sectional structural diagram of the second vulcanized component according to an embodiment of the present invention;

[0043] Fig.13 It is a schematic diagram of the three-dimensional structure of the vulcanized component three according to an embodiment of the present invention;

[0044] Fig.14 It is a schematic cross-sectional structural diagram of the vulcanized component 3 according to an embodiment of the present invention;

[0045] Fig.15 A dynamic characteristic curve diagram of the damping angle and frequency of the hydraulic bushing according to an embodiment of the present invention;

[0046] Fig.16 The figure is a dynamic characteristic curve diagram of the dynamic stiffness and frequency of the hydraulic bushing described in the embodiment of the present invention.

[0047] Description of reference numerals:

[0048] 10. Upper cushion; 11. Upper cushion inner tube; 111. Upper cushion tube body 1; 112. Inner tube upper cover; 12. Upper cushion bracket; 121. Bracket folding edge; 122. Bracket tube wall; 123. Bracket connecting ear 1; 13. Upper cushion rubber; 14. Upper cushion limiter; 20. Lower cushion; 21. Vulcanized part 1; 211. Inner tube 1; 2111. Inner tube body 1; 2112. Step tube body 1; 2113. Step tube body 2; 212. Frame 1; 213. Rubber 1; 2131. Tube body joint rubber 1; 2132. Connection rubber 1; 2133. Frame joint rubber 1; 214. Partition; 2141. Convex ring 1; 2142. Convex ring 2; 22. Vulcanized part 2; 221. Skeleton two; 2211, skeleton folding edge; 2212, skeleton inner tube; 222, flow channel skeleton one; 223, rubber two; 2231, tube body joint rubber two; 2232, connecting rubber two; 2233, skeleton joint rubber two; 224, flow channel; 225, annular pleat one; 23, vulcanized part three; 231, skeleton three; 232, flow channel skeleton two; 233, rubber three; 2331, tube body joint rubber three; 2332, connecting rubber three; 2333, skeleton joint rubber three; 234, liquid inlet; 235, annular pleat two; 24, lower cushion inner tube; 25, lower cushion bracket; 26, cavity one; 27, cavity two; 30, limiting pad; 31, limiting skeleton; 32, limiting rubber. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0050] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate quantity restrictions, but indicate the existence of at least one. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship also changes accordingly.

[0051] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0052] A hydraulic bushing for vehicle body suspension according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings. Example

[0053] This embodiment provides a hydraulic bushing for vehicle body suspension, such as Figure 1-Figure 14 As shown, including:

[0054] Upper cushion 10;

[0055] Lower cushion 20; the upper cushion 10 is connected to the lower cushion 20 at the upper and lower parts, the lower cushion 20 includes a main spring assembly, the main spring assembly includes a cavity 1 26, a cavity 27 with different stiffnesses, and a flow channel 224 connecting cavity 1 26 and cavity 27, cavity 1 26 and cavity 27 are arranged in sequence along the axial direction of the main spring assembly, the cavity 1 26 is arranged on the upper side of cavity 27, the cavity 1 26 is a working chamber participating in the force, the cavity 1 26, cavity 27 and the flow channel 224 are filled with liquid, and the liquid flows in cavity 1 26, cavity 27 and the flow channel 224 under the positive pressure or negative pressure formed by the force of cavity 1 26.

[0056] Through the above arrangement, when the vehicle body passes through uneven sections, such as speed bumps, potholes, bumpy roads, etc., these situations will cause low-frequency, large-amplitude vibrations of the vehicle suspension system. In this case, since only cavity one 26 is subjected to force, the pressure difference between the two cavities increases, and the liquid flows from cavity one 26 to cavity two 27, thereby increasing the stiffness and damping of the hydraulic bushing, which is reflected in high damping and high dynamic stiffness, thereby effectively absorbing and dissipating vibration energy, reducing mutual collision and friction between components, reducing the transmission of vibration to the vehicle body, reducing the shaking and bumping of the vehicle body, and reducing the noise inside the vehicle. level, improving ride comfort; when the vehicle body is traveling on a good road section, such as a highway or a flat road in the city, a small unevenness on the road surface will cause high-frequency, small-amplitude vibrations, or high-frequency, small-amplitude vibrations when the engine is idling. At this time, the pressure difference between the two cavities is small. Under the excitation of high frequency and small amplitude, the liquid inertia effect is small, the liquid flow rate is slow, and the hydraulic bushing provides low damping and low dynamic stiffness, thereby effectively isolating high-frequency vibrations and noise, and effectively isolating the vibration of the suspension system from the body system, thereby obtaining better NVH performance of the whole vehicle and improving the NVH comfort of the whole vehicle. In addition, by setting a single working chamber (i.e., only chamber 126 participates in the force work), a smaller dynamic-static ratio can be provided, so that the system provides balanced performance in various states, which greatly contributes to the improvement of NVH. Correspondingly, the dynamic-static ratio of the hydraulic bushing in the prior art is usually greater than 3, and the dynamic-static ratio of the hydraulic bushing provided in this application can reach 1.8, which significantly improves the NVH comfort of the whole vehicle. It should be understood that the main spring assembly at least includes conventional material structures such as an inner tube, rubber and a frame. Specifically, the above-mentioned cavity and flow channel structure can be obtained through different structures and component designs, which will not be elaborated here.

[0057] It should be noted that the different rigidities of the two cavities can be achieved by different cross-sectional areas of the two cavities and / or different volumes of the two cavities and / or the two cavities using rubbers of different hardness and / or the two cavities using different sealing materials and structures. Specifically, adaptive settings can be made according to corresponding needs, all of which belong to the protection scope of the present invention.

[0058] As a specific example, the volumes of cavity one 26 and cavity two 27 in the present application are different. Furthermore, cavity one 26 can accommodate a larger volume of liquid than cavity two 27. Through the above arrangement, cavity one 26 and cavity two 27 have different stiffnesses, and the pressures formed by the liquid after being subjected to force are also different, so that the liquid can move in the two cavities and the flow channel 224, thereby achieving the effect of reducing vibration and noise.

[0059] As one of the better examples, the cavity 1 26 and cavity 2 27 are at least partially separated by elastic material. Through the above arrangement, under low frequency and high amplitude conditions, part of the pressure on cavity 1 26 will be transmitted to cavity 2 27 through the elastic material, and the two cavities will produce volume changes. Part of the pressure difference between the two cavities is transmitted through the elastic material, avoiding excessive pressure difference in the two cavities, reducing the stress change borne by the hydraulic bushing in this case, and improving the service life of the hydraulic bushing. In addition, the setting of the elastic material between the two cavities also effectively reduces the increase in dynamic stiffness of the hydraulic bushing under low frequency and large amplitude excitation, so that the product has a smaller dynamic-static ratio and improves the NVH comfort of the whole vehicle.

[0060] As an alternative example, Figure 7 , Figure 8 As shown, the main spring assembly includes a vulcanized part 1 21, a vulcanized part 22 and a vulcanized part 3 23. The vulcanized part 1 21 and the vulcanized part 22 are assembled and assembled to form a cavity 1 26 and a cavity 27 which are separated and arranged inside. A flow channel 224 is formed on the periphery of the vulcanized part 22 and the vulcanized part 3 23. The flow channel 224 is used to connect the cavity 1 26 and the cavity 2 27. Through the arrangement of the vulcanized part 1 21, the vulcanized part 22 and the vulcanized part 3 23, the main spring assembly is formed into a modular structure that can be prefabricated and quickly assembled, which is suitable for mass production and assembly of the main spring assembly, so that the structure of the lower cushion 20 can be adjusted in a large space. In addition, the flow channel 224 is formed on the periphery of the vulcanized part 22 and the vulcanized part 3 23, and there is no need to set a flow channel plate structure separately, which simplifies the component structure, saves costs, and improves the performance of the component.

[0061] Specifically, Fig. 9 , Fig.10 As shown, the vulcanized part 21 includes an inner tube 211, a skeleton 212 and a rubber 213. The skeleton 212 is an annular structure, which is sleeved on the outside of the inner tube 211. The rubber 213 is used to connect the inner tube 211 and the skeleton 212. Among them, the inner tube 211 and the skeleton 212 are both metal parts, which are connected by vulcanization to form an integral part, and the rubber part produced by vulcanization is the rubber 213. Through the above arrangement, the vulcanized part 21 forms a modular structure, the production process is simple and convenient, and it is also convenient for subsequent matching and assembly. Preferably, the skeleton 212 is covered by the rubber 213. Specifically, the inner diameter of the skeleton 212 annular structure is larger than the outer diameter of the step tube body 2113.

[0062] Preferably, the vulcanized part 1 21 is also formed with a partition 214. Specifically, the rubber 1 213 cooperates with the skeleton 1 212 to form the partition 214. The vulcanized part 2 22 and the vulcanized part 3 23 are respectively sleeved on the vulcanized part 1 21 at the upper and lower ends of the partition 214. Specifically, during assembly, the skeleton 1 212 is at least partially located between the vulcanized part 2 22 and the vulcanized part 3 23. The partition 214 is provided to separate the cavity 1 26 and the cavity 2 27 on the one hand, and to facilitate the formation of a support structure to maintain the regular shape of the main spring assembly and the cavity 1 26 and the cavity 2 27 on the other hand. Specifically, the cavity 1 26 is formed between the vulcanized part 1 21 and the vulcanized part 2 22, and the cavity 2 27 is formed between the vulcanized part 1 21 and the vulcanized part 3 23.

[0063] Optional, such as Fig.10 As shown, the inner tube 1 211 includes an inner tube body 1 2111, a step tube body 1 2112, and a step tube body 2 2113. The step tube body 1 2112 and the step tube body 2 2113 are sequentially arranged on the outer periphery of the inner tube body 1 2111, and the axial ends of the step tube body 1 2112 respectively form a step surface 1, and the axial ends of the step tube body 2 2113 respectively form a step surface 2, and the rubber 1 213 covers the outer periphery of the step tube body 2 2113 and at least part of the step surface 2. The step surface 1 is used for matching connection with the vehicle body and the limit pad 30, respectively, and the step surface 2 is used for matching assembly with the vulcanized part 2 22 and the vulcanized part 3 23, respectively. Through the above arrangement, the corresponding matching limit assembly structure can be directly formed integrally on the inner tube 1 211 without the need to set up other assembly structures, thereby reducing the number of parts, improving assembly efficiency, and improving the connection strength between the rubber 1 213 and the inner tube 1 211.

[0064] As an example of an alternative, Fig.10 As shown, the rubber 1 213 includes a tube body joint rubber 1 2131, a connecting rubber 1 2132, and a skeleton joint rubber 1 2133. The tube body joint rubber 1 2131 is used to connect with the inner tube 1 211, the skeleton 1 212 is arranged inside the skeleton joint rubber 1 2133, and the connecting rubber 1 2132 is used to connect the tube body joint rubber 1 2131 and the skeleton joint rubber 1 2133. Specifically, the tube body joint rubber 1 2131 is connected with the step tube 2 2113 in cooperation, and the tube body joint rubber 1 2131 covers the outer peripheral surface of the step tube 2 2113 and at least part of the step surface 2. In this arrangement, the connecting rubber 1 2132 cooperates with the partition 214 to separate the cavity 1 26 and the cavity 2 27, that is, the connecting rubber 1 2132 is an elastic material that separates the cavity 1 26 and the cavity 2 27.

[0065] Better, such as Fig.10As shown, the connecting rubber 1 2132 is gradually arranged downward from the inside to the outside along the radial direction of the inner tube 1 211. Through the above arrangement, a small cavity is formed between the connecting rubber 1 2132 and the inner tube 1 211, and the small cavity will form a part of the cavity 2 27 after the vulcanized part 3 23 is assembled, so that a part of the cavity 2 27 extends into the cavity 1 26. The gradually downward arrangement of the connecting rubber 1 2132 also makes the connecting rubber 1 2132 form a relatively thin structure. This arrangement enables the cavity 1 26 to act on the connecting rubber 1 2132 more quickly when subjected to a large force, causing it to be squeezed and deformed, thereby effectively reducing the increase in the pressure difference between the two cavities, so that the hydraulic bushing has a smaller dynamic-static ratio, and improves the NVH performance of the whole vehicle.

[0066] As a preferred example, the skeleton bonding rubber 1 2133 cooperates with the skeleton 1 212 to form a partition 214, and a convex ring 1 2141 and a convex ring 2142 are respectively arranged on the upper and lower end surfaces of the partition 214, the convex ring 1 2141 is used to cooperate with the vulcanized part 22 for sealing, and the convex ring 2142 is used to cooperate with the vulcanized part 3 23 for sealing. The arrangement of the convex ring 1 2141 and the convex ring 2 2142 can significantly improve the sealing performance between the vulcanized part 1 21 and the vulcanized part 22, and between the vulcanized part 1 21 and the vulcanized part 3 23, thereby improving the sealing performance of the cavity 1 26 and the cavity 2 27.

[0067] As an example of the present invention, Fig.11 , Fig.12As shown, the vulcanized part 22 includes a skeleton 221, a flow channel skeleton 1 222 and a rubber 223. The flow channel skeleton 1 222 is arranged on the outer peripheral side of the skeleton 221. The rubber 223 is used to connect the skeleton 221 and the flow channel skeleton 1 222. A channel 1 of a flow channel 224 is formed on the outer periphery of the flow channel skeleton 1 222. The channel 1 is connected to the cavity 1 26. The flow channel skeleton 1 222 and the skeleton 221 are connected by vulcanization to form an integral part, and the rubber part produced by vulcanization is the rubber 223. Through the above arrangement, the vulcanized part 22 forms a modular structure, the production process is simple and convenient, and it is also convenient for subsequent matching and assembly. In addition, by arranging a part of the flow channel 224 on the flow channel skeleton 1 222, there is no need to set up an additional flow channel plate, which saves the parts of the main spring assembly and facilitates its rapid assembly. During assembly, the second skeleton 221 can be sleeved on the first inner tube 211, and its lower end surface abuts against the second step surface or the rubber 1 213 covering the second step surface. This arrangement can achieve the matching positioning of the vulcanized part 1 21 and the second vulcanized part 22 during assembly, and can provide support for the rubber 2 223. Preferably, the lower end surface of the second skeleton 221 abuts against the rubber 1 213 covering the second step surface, and this arrangement can prevent the liquid in the cavity 1 26 from contacting the first inner tube 211 and the second skeleton 221, thereby avoiding corrosion.

[0068] Specifically, Fig.12 As shown, the skeleton 221 includes a skeleton folded edge 2211 and a skeleton inner tube 2212. The skeleton inner tube 2212 is sleeved on the outer periphery of the inner tube 1 211, and its bottom surface is in contact with the step surface 2 or the rubber 1 213 covering the step surface 2. The skeleton folded edge 2211 is arranged at the upper end of the skeleton inner tube 2212 and extends radially outward. The skeleton folded edge 2211 is used to provide corresponding support when the lower cushion 20 is connected to the vehicle body. The skeleton inner tube 2212 cooperates with the step tube body 1 2112 on the inner tube 1 211 to limit the position, so as to realize the rapid limit assembly of the vulcanized part 22.

[0069] Optional, such as Fig.12As shown, the rubber 223 includes a tube body bonding rubber 2231, a connecting rubber 2232, and a skeleton bonding rubber 2233. The tube body bonding rubber 2231 is used to connect with the skeleton 221, the skeleton bonding rubber 2233 at least partially covers the flow channel skeleton 1 222, and the connecting rubber 2232 is used to connect the tube body bonding rubber 2231 and the skeleton bonding rubber 2233. Specifically, the tube body bonding rubber 2231 covers the outer peripheral surface of the skeleton inner tube 2212 and at least part of the skeleton folding edge 2211. More specifically, the skeleton bonding rubber 2233 covers the inner peripheral surface, outer peripheral surface and top surface of the flow channel skeleton 1 222, and optionally does not cover the channel 1. This setting facilitates the accurate setting of the corresponding mold to avoid the rubber blocking the channel 1 during vulcanization.

[0070] Better, such as Fig.12 As shown, the second connecting rubber 2232 is gradually arranged downward from the inside to the outside along the radial direction of the second skeleton 221. Through the above arrangement, in conjunction with the gradually downward arrangement of the first connecting rubber 2132, the first cavity 26 forms a high-inside-low-outside structure, so that in the process of the first cavity 26 being moved by force, the second connecting rubber 2232 and the first connecting rubber 2132 will not be stretched under some working conditions, which, on the one hand, expands the stroke of the second connecting rubber 2232 and the first connecting rubber 2132 that can be stretched, and on the other hand, reduces the number of times they are stretched, especially in the case of high frequency and low amplitude, the second connecting rubber 2232 and the first connecting rubber 2132 will not be stretched, which significantly improves the fatigue life of the second connecting rubber 2232 and the first connecting rubber 2132, and further improves the fatigue life of the hydraulic bushing.

[0071] As an example of the present invention, Fig.13 , Fig.14As shown, the vulcanized part 3 23 includes a skeleton 3 231, a flow channel skeleton 2 232 and a rubber 3 233. The flow channel skeleton 2 232 is arranged on the outer peripheral side of the skeleton 3 231. The rubber 3 233 is used to connect the skeleton 3 231 and the flow channel skeleton 2 232. A channel 2 of the flow channel 224 is formed on the outer periphery of the flow channel skeleton 2 232. The channel 2 is connected with the channel 1 and the cavity 2 27 respectively. The flow channel skeleton 2 232 and the skeleton 3 231 are connected by vulcanization to form an integral part, and the rubber part produced by vulcanization is the rubber 3 233. Through the above arrangement, the vulcanized part 3 23 forms a modular structure, the production process is simple and convenient, and it is also convenient for subsequent matching and assembly. In addition, by arranging a part of the flow channel 224 on the flow channel skeleton 2 232, there is no need to set up an additional flow channel plate, which saves the parts of the main spring assembly and facilitates its rapid assembly. During assembly, the skeleton three 231 can be sleeved on the inner tube one 211, and its upper end surface abuts against the step surface two or the rubber one 213 covering the step surface two. This arrangement can achieve the matching positioning of the vulcanized part one 21 and the vulcanized part three 23 during the matching assembly, and can provide support for the rubber three 233. Preferably, the upper end surface of the skeleton three 231 abuts against the rubber one 213 covering the step surface two, and this arrangement can prevent the liquid in the cavity two 27 from contacting the inner tube one 211 and the skeleton three 231, thereby preventing corrosion.

[0072] Optional, such as Fig.14 As shown, the rubber three 233 includes a tube body joint rubber three 2331, a connecting rubber three 2332, and a skeleton joint rubber three 2333. The tube body joint rubber three 2331 is used to connect with the skeleton three 231, the skeleton joint rubber three 2333 at least partially covers the flow channel skeleton two 232, and the connecting rubber three 2332 is used to connect the tube body joint rubber three 2331 and the skeleton joint rubber three 2333. Specifically, the tube body joint rubber three 2331 covers the outer peripheral surface of the skeleton three 231 and at least part of its upper end surface. More specifically, the skeleton joint rubber three 2333 covers the inner peripheral surface, outer peripheral surface and bottom surface of the flow channel skeleton two 232, and optionally does not cover the channel two. This setting facilitates the accurate setting of the corresponding mold to avoid the rubber blocking the channel two during the vulcanization connection.

[0073] Preferably, the connection rubber 3 2332 is gradually arranged downward from the inside to the outside along the radial direction of the skeleton 3 231. Through the above arrangement, in conjunction with the gradually downward arrangement of the connection rubber 1 2132, the cavity 2 27 forms a high-inside-low-outside structure, so that during the movement of the inner tube 1 211 of the cavity 27, the connection rubber 3 2332 and the connection rubber 1 2132 are basically not stretched under some working conditions, which, on the one hand, expands the stroke of the connection rubber 3 2332 and the connection rubber 1 2132 that can be stretched, and on the other hand, reduces the number of times they are stretched, especially in the case of high frequency and low amplitude, the connection rubber 3 2332 and the connection rubber 1 2132 are basically not stretched, which significantly improves the fatigue life of the connection rubber 3 2332 and the connection rubber 1 2132, and further improves the fatigue life of the hydraulic bushing. Preferably, the connecting rubber three 2332 is arranged in a partial V-shape. Since the cavity two 27 is not directly subjected to force, the deformation degree of the connecting rubber three 2332 is much smaller than that of the connecting rubber two 2232 and the connecting rubber one 2132. In this case, the connecting rubber three 2332 is arranged in a partial V-shape. On the one hand, the fatigue life of the connecting rubber three 2332 is guaranteed, and on the other hand, the volume of the cavity two 27 can be appropriately expanded, the volume difference between the cavity one 26 and the cavity two 27 can be reduced, and an excessive pressure difference in the two cavities can be avoided.

[0074] As an example of an alternative, Figure 6 , Fig.13 , Fig.14 As shown, a liquid inlet 234 connected to the flow channel 224 is provided at the bottom of the vulcanized part 3 23, and the liquid inlet 234 is used to fill liquid into the cavity 1 26, the flow channel 224 and the cavity 2 27. This arrangement facilitates the injection of liquid into the cavity and the flow channel 224, and after the main spring assembly is assembled with the lower cushion bracket 25, the bottom plate of the lower cushion bracket 25 can be used to cover and block the liquid inlet 234, thereby avoiding the risk of liquid leakage from the liquid inlet 234.

[0075] Specifically, the vulcanized part 1 21, the vulcanized part 22 and the vulcanized part 3 23 are assembled by mutual press-fitting and interference fit. The skeleton 1 212 is made of steel and is clamped between the vulcanized part 22 and the vulcanized part 3 23 to play a good supporting role.

[0076] As an example of the present invention, Figure 2As shown, the lower cushion 20 also includes a lower cushion inner tube 24 and a lower cushion bracket 25. The lower cushion inner tube 24 is sleeved on the outer periphery of the main spring assembly, and the lower cushion bracket 25 is sleeved on the outer periphery of the lower cushion inner tube 24. The lower cushion inner tube 24 cooperates with the outer periphery of the main spring assembly to form a flow channel 224. Specifically, the lower cushion inner tube 24 cooperates with a flow channel skeleton 1 222 and a flow channel skeleton 2 232 to form the flow channel 224. Among them, the lower cushion inner tube 24 is an elastic member, and the outer periphery of the lower cushion inner tube 24 is interference fit with the lower cushion bracket 25. Through the above arrangement, the main spring assembly cooperates with the lower cushion bracket 25 to clamp the lower cushion inner tube 24, thereby ensuring the sealing of the flow channel 224.

[0077] As one of the better examples, Figure 6 , Figure 7 , Figure 8 As shown, a plurality of annular pleats 1 225 are provided on the outer circumference of the second vulcanized part 22, and / or a plurality of annular pleats 235 are provided on the outer circumference of the third vulcanized part 23, the annular pleats 1 225 are provided on the upper side of the flow channel 224, and the annular pleats 235 are provided on the lower side of the flow channel 224. Through the above arrangement, the sealing performance between the main spring assembly and the lower cushion inner tube 24 can be further improved, thereby preventing liquid from overflowing from the flow channel 224.

[0078] Specifically, the rubber 1 213, the rubber 223 and the rubber 3 233 all have relatively high flexibility, so that the hydraulic bushing provided in this example has obvious anti-fatigue advantages.

[0079] As an example of the present invention, Figure 3 , Figure 4 As shown, the upper cushion 10 includes an upper cushion inner tube 11, an upper cushion bracket 12 and an upper cushion rubber 13. The upper cushion bracket 12 is sleeved on the outer side of the upper cushion inner tube 11. The upper cushion rubber 13 is used to connect the upper cushion inner tube 11 and the upper cushion bracket 12. The upper cushion inner tube 11 is connected to the lower cushion 20. The upper cushion inner tube 11 and the upper cushion bracket 12 are both metal parts, which are connected to form an integral part by vulcanization. The rubber part produced by vulcanization is the upper cushion rubber 13. Through the above arrangement, the upper cushion 10 forms a corresponding modular structure, which can be pre-produced. The production process is simple and convenient, and it is also convenient for subsequent matching and assembly. Specifically, the inner diameter of the upper cushion bracket 12 is larger than the upper cushion inner tube 11. This arrangement allows a certain gap to exist between the upper cushion bracket 12 and the upper cushion inner tube 11. During vulcanization molding, the gap will also be filled with rubber, so that the upper cushion inner tube 11 and the upper cushion bracket 12 can be relatively displaced after the upper cushion 10 is subjected to force, thereby attenuating vibration to a certain extent and further improving the shock absorption and noise reduction performance of the hydraulic bushing.

[0080] Specifically, Figure 4 As shown, the upper cushion inner tube 11 includes an upper cushion tube body 111 and an inner tube upper cover 112, the inner tube upper cover 112 is arranged at one end of the upper cushion tube body 111 away from the lower cushion 20, and extends outward along the radial outer circumference of the upper cushion tube body 111; the upper cushion bracket 12 includes a bracket folded edge 121 and a bracket tube wall 122, the bracket tube wall 122 is sleeved on the outside of the upper cushion tube body 111, the bracket folded edge 121 is arranged on the bracket tube wall 122 close to one end of the inner tube upper cover 112, and the bracket folded edge 121 is used to cooperate with the inner tube upper cover 112 to limit the deformation of the upper cushion rubber 13. It should be understood that when the hydraulic bushing is stressed, the upper cushion rubber 13 will deform, thereby changing the distance between the inner tube upper cover 112 and the lower cushion 20. The bracket folding edge 121 is used to cooperate with the inner tube upper cover 112 to limit the upper cushion rubber 13 to avoid excessive deformation and affect its service life. Preferably, the upper cushion bracket 12 also includes a bracket connecting ear 123, which is arranged on the bracket tube wall 122 at one end close to the lower cushion 20, and a bracket connecting ear 2 is arranged at one end of the lower cushion bracket 25 close to the upper cushion 10. The bracket connecting ear 2 is arranged corresponding to the bracket connecting ear 123, and a certain distance is maintained between the two. After the connecting structure on the vehicle body extends into the distance, the three are connected by bolts.

[0081] Better, such as Figure 4 As shown, an upper cushion limiting frame 14 is sleeved on one end of the upper cushion inner tube 11 close to the lower cushion 20, and the upper cushion limiting frame 14 is arranged between the upper cushion bracket 12 and the upper cushion inner tube 11, and the upper cushion limiting frame 14 and the upper cushion inner tube 11 are interference fit, and the upper cushion limiting frame 14 is also used to limit the deformation of the upper cushion rubber 13. Since the inner diameter of the upper cushion bracket 12 is larger than the upper cushion inner tube 11, a part of the upper cushion rubber 13 is located between the upper cushion bracket 12 and the upper cushion inner tube 11, and the upper cushion limiting frame 14 can limit the part of the upper cushion rubber 13, thereby further reducing the risk of excessive deformation of the upper cushion rubber 13 and affecting its service life.

[0082] As an example of an alternative, Figure 2As shown, the hydraulic bushing also includes a limit pad 30, which is arranged on the side of the lower cushion 20 away from the upper cushion 10. The limit pad 30 includes a limit frame 31 and a limit rubber 32, and the limit rubber 32 is arranged on the side of the limit frame 31 close to the lower cushion 20. The middle part of the limit pad 30 protrudes toward the lower cushion 20 and is used to connect with the lower cushion 20. The limit pad 30 is used to limit the lower cushion 20, and the limit rubber 32 can play a buffering role when the two collide. Specifically, a through hole is provided at the center position of the limit frame 31. When the hydraulic bushing is installed, the bolts pass through the limit pad 30, the inner tube 1211 and the upper cushion inner tube 11 in sequence to connect with the vehicle body.

[0083] Fig.15 The dynamic characteristic curves of the damping angle and frequency of the hydraulic bushing at different amplitudes provided for this example are as follows. Fig.16 This example provides a dynamic characteristic curve of the hydraulic bushing's dynamic stiffness and frequency at different amplitudes, where Fig.15 The vertical axis is the damping angle, and the horizontal axis is the frequency. Fig.16 The ordinate is the dynamic stiffness, the abscissa is the frequency, the amplitude corresponding to PP01 is ±0.05mm, the amplitude corresponding to PP02 is ±0.1mm, and the amplitude corresponding to PP1 is ±0.5mm. By comparison, it can be seen that under low frequency and low amplitude (5-20Hz), the high damping angle of the hydraulic bushing can generate a larger damping force, thereby effectively absorbing low-frequency vibrations, and its high dynamic stiffness can reduce the deformation and vibration amplitude of the suspension system under low-frequency vibrations, further reduce the noise generated by the suspension system itself, and help improve the NVH performance of the vehicle; under low-frequency and large-amplitude conditions, its damping angle and dynamic stiffness are still large, but are appropriately reduced relative to low-frequency and low-amplitude conditions, so that the hydraulic bushing can respond to vehicle motion changes faster under low-frequency and large-amplitude excitation, reduce energy absorption and release time, and improve vehicle smoothness; while under high-frequency conditions, regardless of large or small amplitudes, the damping angle and dynamic stiffness are maintained at a relatively low state, which can effectively reduce the transmission of the system's vibration energy, reduce the risk of resonance in the high-frequency region, and avoid equipment damage or performance degradation caused by resonance.

[0084] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A hydraulic bushing for vehicle body suspension, characterized in that: include: Upper cushion (10); The lower cushion (20); the upper cushion (10) and the lower cushion (20) are connected to each other at the top and bottom, and the lower cushion (20) includes a main spring assembly, and the main spring assembly includes a cavity one (26), a cavity two (27) with different stiffnesses, and a flow channel (224) connecting the cavity one (26) and the cavity two (27). The cavity one (26) and the cavity two (27) are arranged in sequence along the axial direction of the main spring assembly, and the cavity one (26) is arranged on the upper side of the cavity two (27). The cavity one (26) is a working chamber that participates in force. The cavity one (26), the cavity two (27) and the flow channel (224) are filled with liquid. The liquid flows in the cavity one (26), the cavity two (27) and the flow channel (224) under the positive pressure or negative pressure formed by the force of the cavity one (26).

2. The hydraulic bushing for vehicle body suspension according to claim 1, characterized in that: The main spring assembly comprises a vulcanized part 1 (21), a vulcanized part 2 (22) and a vulcanized part 3 (23). The vulcanized part 1 (21) and the vulcanized part 2 (22) are assembled and combined with each other to form a cavity 1 (26) and a cavity 2 (27) which are separated and arranged inside. A flow channel (224) is formed on the periphery of the vulcanized part 2 (22) and the vulcanized part 3 (23). The flow channel (224) is used to connect the cavity 1 (26) and the cavity 2 (27).

3. The hydraulic bushing for vehicle body suspension according to claim 2, characterized in that: The vulcanized part 1 (21) comprises an inner tube 1 (211), a skeleton 1 (212) and a rubber 1 (213). The skeleton 1 (212) is an annular structure and is sleeved on the outer side of the inner tube 1 (211). The rubber 1 (213) is used to connect the inner tube 1 (211) and the skeleton 1 (212).

4. The hydraulic bushing for vehicle body suspension according to claim 3, characterized in that: The vulcanized component 1 (21) is also formed with a partition (214), and the vulcanized component 2 (22) and the vulcanized component 3 (23) are respectively mounted on the vulcanized component 1 (21) at the upper and lower ends of the partition (214); a cavity 1 (26) is formed between the vulcanized component 1 (21) and the vulcanized component 2 (22), and a cavity 2 (27) is formed between the vulcanized component 1 (21) and the vulcanized component 3 (23).

5. The hydraulic bushing for vehicle body suspension according to claim 4, characterized in that: The rubber one (213) includes a tube body joint rubber one (2131), a connecting rubber one (2132), and a skeleton joint rubber one (2133). The tube body joint rubber one (2131) is used to connect with the inner tube one (211), the skeleton one (212) is arranged inside the skeleton joint rubber one (2133), and the connecting rubber one (2132) is used to connect the tube body joint rubber one (2131) and the skeleton joint rubber one (2133).

6. The hydraulic bushing for vehicle body suspension according to claim 5, characterized in that: The connecting rubber 1 (2132) cooperates with the partition (214) to separate the cavity 1 (26) from the cavity 2 (27).

7. The hydraulic bushing for vehicle body suspension according to any one of claims 2 to 6, characterized in that: The vulcanized part 2 (22) comprises a skeleton 2 (221), a flow channel skeleton 1 (222) and a rubber 2 (223), wherein the flow channel skeleton 1 (222) is arranged on the outer peripheral side of the skeleton 2 (221), and the rubber 2 (223) is used to connect the skeleton 2 (221) and the flow channel skeleton 1 (222), and a channel 1 of the flow channel (224) is formed on the outer periphery of the flow channel skeleton 1 (222), and the channel 1 is connected to the cavity 1 (26).

8. The hydraulic bushing for vehicle body suspension according to claim 7, characterized in that: The rubber 2 (223) comprises a tube body bonding rubber 2 (2231), a connecting rubber 2 (2232), and a skeleton bonding rubber 2 (2233). The tube body bonding rubber 2 (2231) is used to connect with the skeleton 2 (221). The skeleton bonding rubber 2 (2233) at least partially covers the flow channel skeleton 1 (222). The connecting rubber 2 (2232) is used to connect the tube body bonding rubber 2 (2231) and the skeleton bonding rubber 2 (2233).

9. The hydraulic bushing for vehicle body suspension according to claim 7, characterized in that: The vulcanized part three (23) comprises a skeleton three (231), a flow channel skeleton two (232) and a rubber three (233), wherein the flow channel skeleton two (232) is arranged on the outer peripheral side of the skeleton three (231), and the rubber three (233) is used to connect the skeleton three (231) and the flow channel skeleton two (232), and a channel two of the flow channel (224) is formed on the outer periphery of the flow channel skeleton two (232), and the channel two is respectively connected to the channel one and the cavity two (27).

10. The hydraulic bushing for vehicle body suspension according to claim 9, characterized in that: The rubber three (233) includes a tube body joint rubber three (2331), a connecting rubber three (2332), and a skeleton joint rubber three (2333). The tube body joint rubber three (2331) is used to connect with the skeleton three (231). The skeleton joint rubber three (2333) at least partially covers the flow channel skeleton two (232). The connecting rubber three (2332) is used to connect the tube body joint rubber three (2331) and the skeleton joint rubber three (2333).

11. The hydraulic bushing for vehicle body suspension according to any one of claims 2 to 6, characterized in that: A liquid inlet (234) connected to the flow channel (224) is provided at the bottom end of the vulcanized component three (23), and the liquid inlet (234) is used to fill liquid into the cavity one (26), the flow channel (224) and the cavity two (27).

12. The hydraulic bushing for vehicle body suspension according to any one of claims 1 to 6, characterized in that: The lower cushion (20) further comprises a lower cushion inner tube (24) and a lower cushion bracket (25); the lower cushion inner tube (24) is sleeved on the outer circumference of the main spring assembly; the lower cushion bracket (25) is sleeved on the outer circumference of the lower cushion inner tube (24); the lower cushion inner tube (24) cooperates with the outer circumference of the main spring assembly to form a flow channel (224).

13. The hydraulic bushing for vehicle body suspension according to any one of claims 1 to 6, characterized in that: It also includes a limiting pad (30), which is arranged on a side of the lower soft pad (20) away from the upper soft pad (10).

14. The hydraulic bushing for vehicle body suspension according to claim 13, characterized in that: The limiting pad (30) comprises a limiting frame (31) and a limiting rubber (32), wherein the limiting rubber (32) is arranged on a side of the limiting frame (31) close to the lower soft pad (20).

15. The hydraulic bushing for vehicle body suspension according to any one of claims 1 to 6, characterized in that: The upper cushion (10) comprises an upper cushion inner tube (11), an upper cushion bracket (12) and an upper cushion rubber (13); the upper cushion bracket (12) is sleeved on the outer side of the upper cushion inner tube (11); the upper cushion rubber (13) is used to connect the upper cushion inner tube (11) and the upper cushion bracket (12); and the upper cushion inner tube (11) is connected to the lower cushion (20).

16. The hydraulic bushing for vehicle body suspension according to claim 15, characterized in that: The upper cushion inner tube (11) comprises an upper cushion tube body (111) and an inner tube upper cover (112), wherein the inner tube upper cover (112) is arranged at one end of the upper cushion tube body (111) away from the lower cushion (20) and extends outward along the radial outer circumference of the upper cushion tube body (111); the upper cushion bracket (12) comprises a bracket folded edge (121) and a bracket tube wall (122), wherein the bracket tube wall (122) is sleeved on the outer side of the upper cushion tube body (111), and the bracket folded edge (121) is arranged on one end of the bracket tube wall (122) close to the inner tube upper cover (112), and the bracket folded edge (121) is used to cooperate with the inner tube upper cover (112) to limit the deformation of the upper cushion rubber (13).

17. The hydraulic bushing for vehicle body suspension according to claim 16, characterized in that: An upper cushion limiting frame (14) is sleeved on one end of the upper cushion inner tube (11) close to the lower cushion (20); the upper cushion limiting frame (14) is arranged between the upper cushion support (12) and the upper cushion inner tube (11); and the upper cushion limiting frame (14) and the upper cushion inner tube (11) are interference fit.

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