Hydraulic mount

Abstract

The invention provides a hydraulic suspension which comprises a base and an upper cover, a mounting cavity is formed between the upper cover and the base, an upper rubber main spring and a lower rubber main spring are arranged in the mounting cavity, the lower end of the lower rubber main spring is connected with the base, and a mounting channel used for allowing a mounting block of a supporting arm to be inserted and matched is formed in the upper end of the lower rubber main spring. The upper end of the upper rubber main spring is connected with the upper cover, and the lower end of the upper rubber main spring is connected with the lower rubber main spring; the rear side of the lower rubber main spring is provided with a first limiting part used for limiting forward movement of the supporting arm in an outwards-protruding mode. The upper rubber main spring is provided with a second limiting part used for limiting backward movement of the supporting arm. According to the hydraulic suspension, improvement is conducted on the basis of an existing traditional suspension structure, the Z-direction rigidity is effectively improved, the cost is saved, Y-direction bilateral limiting of a power assembly can be achieved through a single suspension structure, the structure is simplified, and the normal weight is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle damping devices, in particular to a hydraulic suspension. BACKGROUND

[0002] During the driving process of the automobile, the vibration of the engine is one of the main sources of the vibration of the automobile body. The existing automobile usually uses rubber suspension and hydraulic suspension to buffer and isolate the engine vibration, but the traditional rubber suspension cannot well meet the performance requirements of automobile vibration reduction and noise reduction. The emergence of engine hydraulic suspension technology makes up for the deficiency of rubber suspension.

[0003] With the rapid growth of market demand for new energy vehicles, hybrid vehicles are becoming more and more common. Compared with traditional fuel vehicles, the powertrain weight of hybrid vehicles will be much heavier, so the Z-direction stiffness requirement of the hydraulic suspension is also higher and higher. The Z-direction stiffness of the hydraulic suspension of the general traditional fuel vehicle is between 130~300N / mm, but now some main machine factories require the Z-direction stiffness of the hydraulic suspension of the hybrid vehicle to reach ≥400N / mm. Due to the limitation of the Z-direction structure and the rubber main spring, the traditional hydraulic suspension structure has been difficult to meet the application of the existing new energy vehicles.

[0004] In addition, the vehicle powertrain needs to be limited in the engine compartment to avoid collision with the surrounding parts due to excessive moving stroke. The existing traditional trapezoidal hydraulic suspension structure can rely on the limiting part arranged on the two side walls of the rubber main spring in the left and right directions to achieve X-direction movement limiting. Due to the structure and position limitation of the support arm structure, the front and rear direction (Y direction) movement can usually be limited on one side only. Therefore, in actual application, two suspensions need to be cooperated to realize Y-direction bilateral limiting, which increases the cost and is not conducive to the lightweight control of the vehicle. SUMMARY

[0005] In order to overcome at least one defect in the above prior art, the present application provides a hydraulic suspension which is improved on the basis of the existing traditional suspension structure, effectively improves the Z-direction stiffness, saves the cost, and realizes the Y-direction bilateral limiting of the powertrain by a single suspension structure, simplifies the structure, and reduces the normal weight.

[0006] The technical scheme adopted by the present application is: a hydraulic suspension is provided, which comprises a base and an upper cover, an installation cavity is formed between the upper cover and the base, an upper rubber main spring and a lower rubber main spring are arranged in the installation cavity, the lower end of the lower rubber main spring is connected with the base, an installation channel for plug-in cooperation of the mounting block of the support arm is arranged on the upper end of the lower rubber main spring, the upper end of the upper rubber main spring is connected with the upper cover, and the lower end is connected with the lower rubber main spring; the outer side of the rear side of the lower rubber main spring is protruded and provided with a first limiting part for limiting the forward movement of the support arm; the upper rubber main spring is provided with a second limiting part for limiting the rearward movement of the support arm.

[0007] Compared with the prior art, the hydraulic suspension of the present invention has the following advantages: In the hydraulic suspension structure of this invention, an upper rubber main spring and a lower rubber main spring are arranged within the mounting cavity formed by the upper cover and the base. The upper and lower rubber main springs have superimposed stiffness in the Z-direction to meet the requirements of heavier new energy vehicles. The lower rubber main spring and the base structure can directly utilize existing structures; that is, by simply modifying the upper cover structure and adding an upper rubber main spring structure, the stiffness of the entire hydraulic suspension can be improved. Existing parts and molds can continue to be used interchangeably without being scrapped, reducing costs. Furthermore, the suspension structure of this invention can change the stiffness of the upper structure by altering the hardness of the rubber material of the upper rubber main spring, thereby obtaining hydraulic suspensions with various stiffnesses and expanding the application range. In another aspect, in the structure of this invention, by adding a second limiting part to the upper rubber main spring to cooperate with the first limiting part on the lower rubber main spring, the travel distance of the control arm in the forward and backward direction (Y-direction) is limited, thereby preventing excessive forward and backward movement of the control arm from causing collisions and interference with surrounding components. In existing hydraulic suspension structures, due to the special nature of the structure, the corresponding limiting part can only be set on the rear side wall of the lower rubber main spring. That is, the limiting can only be achieved in one direction when the outrigger moves back and forth, and there is still a possibility of collision in the other direction. Therefore, when using traditional trapezoidal suspension structures, two suspensions are required to limit the outrigger in both the front and rear directions. The structure of the present invention solves the defects of the prior art well, and a single suspension structure can achieve the front and rear bidirectional limiting of the outrigger.

[0008] Furthermore, the lower end of the lower rubber main spring is vulcanized and connected to the base, and the first limiting part and the lower rubber main spring are integrally injection molded rubber parts.

[0009] Furthermore, the upper rubber main spring includes an upper main spring body and an inner core located at its center. The inner core has a connecting hole that connects to the mounting channel. A connecting bolt for connecting the mounting block passes through the connecting hole. An avoidance through hole is provided in the middle of the upper cover at a position corresponding to the inner core.

[0010] As an improvement, the outer side of the upper end of the main spring body is also provided with a nylon skeleton for fitting with the upper cover. The nylon skeleton, the inner core and the main spring body are vulcanized and connected as an integral structure.

[0011] In a further improvement, the upper end of the main spring body and the outer periphery of the inner core are provided with a bowl-shaped groove with an upper opening, the nylon skeleton is located on the outer periphery of the bowl-shaped groove, the second limiting part is protrudingly disposed on the inner wall of the rear side of the bowl-shaped groove, and the second limiting part is a rubber part integrally injection molded with the upper rubber main spring.

[0012] In a further improvement, the upper main spring body has a shock-absorbing block protruding outward on the side near the support arm, located above the support arm.

[0013] In a further improvement, the top of the lower rubber main spring is provided with a fitting through hole communicating with the mounting channel, the lower end of the upper rubber main spring is fitted into the fitting through hole, and the bottom of the inner core abuts against the top of the mounting block.

[0014] In a further improvement, the bottom of the inner core is provided with a positioning protrusion, and the mounting block is pre-set with a positioning groove for the positioning protrusion to be inserted and fitted.

[0015] Furthermore, the inner core includes a cylindrical portion and a frustum portion distributed from top to bottom. The small-diameter end of the frustum portion is connected to the lower end of the cylindrical portion. The upper part of the upper main spring body extends and wraps around the outside of the cylindrical portion, and the lower part extends and wraps around the outside of the frustum portion.

[0016] Furthermore, the lower rubber main spring has a third limiting part protruding outward on both the left and right outer walls for limiting the left and right movement of the support arm, and the third limiting part is a rubber part integrally injection molded with the lower rubber main spring.

[0017] Other improvements and advantages of the invention will be set forth in the detailed description that follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the hydraulic suspension of the present invention; Figure 2 This is an exploded structural diagram of the hydraulic suspension of the present invention; Figure 3 This is an exploded view of the hydraulic suspension of the present invention from another angle; Figure 4 This is a top view of the hydraulic suspension of the present invention; Figure 5 for Figure 4 Sectional view along line AA in the middle; Figure 6 for Figure 4 BB-direction sectional view in the middle; Figure 7 This is a structural diagram of the upper rubber main spring in this invention; Figure 8 This is another structural diagram of the upper rubber main spring in this invention.

[0019] Explanation of reference numerals in the attached figures: 1. Base; 2. Top cover; 3. Mounting cavity; 4. Upper rubber main spring; 401. Upper main spring body; 402. Inner core; 4021. Cylindrical part; 4022. Frustum part; 403. Nylon skeleton; 404. Shock absorber block; 405. Bowl-shaped groove; 406. Limiting protrusion; 5. Lower rubber main spring; 501. Lower main spring body; 502. Inner skeleton; 6. Support arm; 7. Mounting block; 8. Mounting channel; 9. Connecting bolt; 10. Clearance through hole; 11. Fitting through hole; 12. Positioning protrusion; 13. Positioning groove; 14. First limiting part; 15. Second limiting part; 16. Third limiting part; 17. Connecting ear plate. Detailed Implementation

[0020] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0021] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "fixed" and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0022] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] See Figures 1 to 8 As shown in the figure, this application discloses a hydraulic suspension, including a base 1 and a top cover 2. An installation cavity 3 is formed between the top cover 2 and the base 1. Specifically, corresponding connecting lugs 17 are provided at both ends of the top cover 2 and the base 1, and each connecting lug 17 has a through hole. In addition, in order to facilitate the connection between the top cover 2 and the base 1, a limiting post is provided at the bottom of the two connecting lugs 17 at both ends of the top cover 2. Correspondingly, a limiting hole is provided on the two connecting lugs 17 at both ends of the base 1 for the limiting post to be inserted and positioned. When the top cover 2 and the base 1 are fitted together, the installation position is limited by the cooperation of the limiting post and the limiting hole, ensuring that the connecting through holes on the top cover 2 and the base 1 are accurately aligned vertically after the two parts are assembled, which facilitates the quick installation of the subsequent connecting bolts 9.

[0024] See appendix Figure 5The mounting cavity 3 contains an upper rubber main spring 4 and a lower rubber main spring 5. The lower end of the lower rubber main spring 5 is connected to the base 1, and the upper end of the lower rubber main spring 5 has a mounting channel 8 for the mounting block 7 of the support arm 6 to be inserted and fitted. The upper end of the upper rubber main spring 4 is connected to the upper cover 2, and the lower end is connected to the lower rubber main spring 5. A connecting bolt 9 for fixing the mounting block 7 is vertically inserted through the upper rubber main spring 4. In this structure, compared with the existing hydraulic suspension, an upper rubber main spring 4 is added in the mounting cavity 3 and above the lower rubber main spring 5. That is, by superimposing the stiffness of the upper and lower rubber main springs, the stiffness performance of the entire hydraulic suspension in the Z-axis direction is effectively improved, thereby improving the shock absorption performance of the whole vehicle. In addition, in this structure, a connecting bolt 9 is added to the upper rubber main spring 4. When the mounting block 7 of the support arm 6 is inserted and fitted into the mounting channel 8, the lower end of the connecting bolt 9 is connected to the mounting block 7, improving the pull-out resistance of the mounting block 7. Specifically, the upper end of the mounting block 7 is pre-drilled with threaded holes for the connecting bolts 9 to mate with.

[0025] On the other hand, the lower rubber main spring 5 and the base 1 structure described in this application can directly utilize existing structures. That is, by simply changing the structure of the upper cover 2 and adding an upper rubber main spring 4, the stiffness of the entire hydraulic suspension can be improved. Existing parts and molds can continue to be used interchangeably without being scrapped, thus reducing costs. Moreover, in this new structure, the stiffness of the upper structure can be changed by altering the hardness of the rubber material of the upper rubber main spring 4, thereby obtaining hydraulic suspensions with various stiffnesses and expanding the application range.

[0026] In this embodiment, see Appendix Figure 3 and 5 The upper rubber main spring 4 includes an upper main spring body 401 and an inner core 402 located at its center. The inner core 402 has a vertically opening connecting hole that connects to the mounting channel 8. The connecting bolt 9 passes through the connecting hole, and the lower end of the connecting bolt 9 is connected to the mounting block 7. Specifically, the inner core 402 here serves as a skeleton to improve strength. It is made of A380 material. A380 uses a large amount of composite materials. The innovative GLARE (glass fiber reinforced aluminum) material was used in its development. Compared with traditional aluminum materials, it is lighter, stronger, has better fatigue resistance, and its maintenance performance and service life are greatly improved. No special processing technology is required.

[0027] In the above structure, see Appendix Figure 2 , 6 In section 8, a shock-absorbing block 404 is formed protruding outward on the side of the upper main spring body 401 near the support arm 6 and located above the support arm 6. In this structure, after the shock-absorbing block 404 is set, when the support arm 6 swings, its top will not directly make hard contact with the upper cover 2, but will achieve buffering and shock absorption through the shock-absorbing block 404 to avoid noise generation.

[0028] Additionally, the mounting block 7 has a pre-drilled threaded hole for connecting bolts 9. After the mounting block 7 is inserted into the mounting channel 8, the connecting bolts 9 are screwed on so that their lower ends are connected to the threaded holes, so that the inner core 402 and the mounting block 7 are firmly connected by the connecting bolts 9. This effectively ensures the connection strength between the support arm 6 and the entire hydraulic suspension, making it less prone to slippage in the lateral direction and ensuring safety performance.

[0029] In this embodiment, an avoidance through hole 10 is provided in the middle of the upper cover 2 at a position corresponding to the inner core 402, so as to avoid interference between the inner core 402 and the upper cover 2 when the inner core 402 moves upward, thus affecting the shock absorption performance.

[0030] In this embodiment, in order to achieve rapid installation of the upper rubber main spring 4 and the upper cover 2 and ensure the strength of the installation structure, an annular nylon skeleton 403 is provided on the outer side of the upper end of the upper main spring body 401. A fitting groove is provided at the upper end of the inner cavity of the upper cover 2, and the nylon skeleton 403 is interference-fitted in the fitting groove. Furthermore, in this structure, the nylon skeleton 403, the inner core 402 and the upper main spring body 401 are vulcanized and connected as an integral structure, which simplifies the connection process and improves the strength of the connection structure.

[0031] More specifically, in the above structure, see Appendix Figure 7 A limiting protrusion 406 is provided on the outer wall of the nylon skeleton 403. Correspondingly, a limiting groove (not shown in the figure) is provided on the inner wall of the mounting groove for the limiting protrusion 406 to engage. The limiting structure here not only limits the installation angle between the upper rubber main spring 4 and the upper cover 2, but also plays a role in preventing circumferential rotation, effectively improving the stability of the mounting structure.

[0032] In another aspect, in this embodiment, a fitting through hole 11 communicating with the mounting channel 8 is provided at the top of the lower rubber main spring 5. The lower end of the upper rubber main spring 4 fits into the fitting through hole 11, and the bottom of the inner core 402 abuts against the top of the mounting block 7. More specifically, a positioning protrusion 12 is provided on the bottom of the inner core 402, and a positioning groove 13 is pre-set on the mounting block 7 for the positioning protrusion 12 to be inserted and fitted. In this structure, during installation, the positioning protrusion 12 at the bottom of the inner core 402 is pre-positioned with the pre-set positioning groove 13 on the mounting block 7, ensuring that the connecting bolt 9 can be accurately aligned with the threaded hole, thereby improving installation efficiency.

[0033] In the above structure, the lower rubber main spring 5 includes a lower main spring body 501 and an inner skeleton 502 embedded therein. That is, the lower main spring body 501 and the inner skeleton 502 are integrally injection molded. The upper part of the inner skeleton 502 is a rectangular frame with a horizontal opening. The mounting channel 8 is formed in the inner cavity of the rectangular frame. Furthermore, a fitting through hole 11 is provided at the top of the rectangular frame at the position corresponding to the circular hole. That is, when the lower end of the inner core 402 fits into the fitting through hole 11, the structure of the inner skeleton 502 improves the lateral tensile strength of the inner core 402 in the fitting through hole 11, preventing the support arm 6 from laterally disengaging from the mounting channel 8.

[0034] In this embodiment, as a preferred structure, see Appendix Figure 6 The inner core 402 includes a cylindrical portion 4021 and a frustum portion 4022 distributed from top to bottom. The small-diameter end of the frustum portion 4022 connects to the lower end of the cylindrical portion 4021. The upper part of the upper main spring body 401 extends and wraps around the outside of the cylindrical portion 4021, and the lower part extends and wraps around the outside of the frustum portion 4022. In this structure, when the upper rubber main spring 4 moves upward, the inclined outer wall of the frustum increases the force-bearing surface between the frustum and the upper main spring body 401, improving the vulcanization connection strength between the two components and ensuring that the inner core 402 and the upper main spring body 401 do not separate during upward movement. Simultaneously, the lower end face of the frustum portion 4022 abuts against the mounting block 7, effectively increasing the contact area when pressing the mounting block 7 and enhancing the lateral locking force.

[0035] In this embodiment, third limiting parts 16 for limiting the left and right movement of the support arm 6 are provided on the outer walls of both sides of the lower rubber main spring 5. See attached figure. Figure 6 Here, there is a uniform movement space between the two third limiting parts 16 and the side walls of the mounting cavity 3. The extreme positions of the support arm 6 moving left or right are abutted by the corresponding third limiting parts 16 to avoid excessive movement and collision with surrounding parts. Preferably, both third limiting parts 16 are rubber parts integrally injection molded with the lower rubber main spring 5. Specifically, the third limiting part 16 includes multiple vertically extending ribs.

[0036] On the other hand, participating in the attached Figure 5The lower end of the lower rubber main spring 5 is vulcanized and connected to the base 1, and the rear side of the lower rubber main spring 5 has a first limiting part 14 for limiting the forward movement of the support arm 6; the upper rubber main spring 4 has a second limiting part 15 for limiting the backward movement of the support arm 6. In this structure, by adding the second limiting part 15 on the upper rubber main spring 4 to cooperate with the first limiting part 14 on the lower rubber main spring 5, the travel of the support arm 6 in the front-back direction is limited, thereby avoiding excessive front-back movement of the support arm 6 and causing collision and interference with surrounding components. In the existing hydraulic suspension structure, due to the special nature of the structure, the corresponding limiting part can only be set on the rear side wall of the lower rubber main spring 5, that is, the support arm 6 can only be limited in one direction during the front-back movement, and there is still a possibility of collision in the other direction. Therefore, when using the traditional trapezoidal structure suspension, two suspensions are required to limit the support arm 6 in both the front-back and rear-back directions. The structure of this embodiment solves the defects of the prior art well, and a single suspension structure can achieve the front-back and rear-back bidirectional limiting of the support arm 6.

[0037] More specifically, in the above structure, the upper end of the main spring body 401 and the outer periphery of the inner core 402 are provided with a bowl-shaped groove 405 with an upper opening, the nylon skeleton 403 is located on the outer periphery of the bowl-shaped groove 405, and the second limiting part 15 is protrudingly provided on the inner wall of the rear side of the bowl-shaped groove 405. In this structure, the bowl-shaped groove 405 provides the inner core 402 with a certain amount of sway space within the upper main spring body 401. Furthermore, the second limiting part 15 also limits the movement of the support arm 6 to the left. That is, when the support arm 6 moves to the left, the inner core 402 moves synchronously to the left, and the upper main spring body 401 deforms. When the displacement is set during movement, the support arm 6 abuts against the first limiting part 14, thus limiting its position. Similarly, when the support arm 6 moves to the right, since the mounting block 7 is fixed to the inner core 402, the inner core 402 moves synchronously to the right until its right side abuts against the second limiting part 15. Simultaneously, the nylon skeleton 403 on the outer periphery of the second limiting part 15 provides stable limiting for the rightward movement of the support arm 6.

[0038] In this embodiment, preferably, the first limiting part 14 is a rubber part integrally injection molded with the lower main spring body 501, and the second limiting part 15 is a rubber part integrally injection molded with the upper main spring body 401.

[0039] In the description of this application, the references to terms such as "this embodiment," "some embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0040] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A hydraulic suspension comprising a base (1) and a top cover (2), wherein a mounting cavity (3) is formed between the top cover (2) and the base (1), characterized in that: The mounting cavity (3) is provided with an upper rubber main spring (4) and a lower rubber main spring (5). The lower end of the lower rubber main spring (5) is connected to the base (1). The upper end of the lower rubber main spring (5) is provided with a mounting channel (8) for the mounting block (7) of the support arm (6) to be inserted and fitted. The upper end of the upper rubber main spring (4) is connected to the upper cover (2), and the lower end is connected to the lower rubber main spring (5). The rear side of the lower rubber main spring (5) is provided with a first limiting part (14) for limiting the forward movement of the support arm (6). The upper rubber main spring (4) is provided with a second limiting part (15) for limiting the backward movement of the support arm (6).

2. The hydraulic suspension according to claim 1, characterized in that: The lower end of the lower rubber main spring (5) is vulcanized and connected to the base (1), and the first limiting part (14) and the lower rubber main spring (5) are integrally injection molded rubber parts.

3. The hydraulic suspension according to claim 1, characterized in that: The upper rubber main spring (4) includes an upper main spring body (401) and an inner core (402) located at its center. The inner core (402) has a connecting hole that connects to the mounting channel (8). A connecting bolt (9) for connecting the mounting block (7) passes through the connecting hole. The upper cover (2) has an avoidance through hole (10) at the position corresponding to the inner core (402) in the middle.

4. The hydraulic suspension according to claim 3, characterized in that: The outer side of the upper main spring body (401) is also provided with a nylon skeleton (403) for fitting with the upper cover (2). The nylon skeleton (403), the inner core (402) and the upper main spring body (401) are vulcanized and connected as an integral structure.

5. The hydraulic suspension according to claim 4, characterized in that: The upper end of the upper main spring body (401) and the outer periphery of the inner core (402) are provided with a bowl-shaped groove (405) with an upper opening. The nylon skeleton (403) is located on the outer periphery of the bowl-shaped groove (405). The second limiting part (15) is protrudingly disposed on the inner wall of the rear side of the bowl-shaped groove (405). The second limiting part (15) is a rubber part integrally injection molded with the upper rubber main spring (4).

6. The hydraulic suspension according to claim 4, characterized in that: The upper main spring body (401) has a shock-absorbing block (404) protruding outward on the side near the support arm (6) and located above the support arm (6).

7. The hydraulic suspension according to claim 3, characterized in that: The lower rubber main spring (5) has a fitting through hole (11) at its top that communicates with the mounting channel (8). The lower end of the upper rubber main spring (4) fits into the fitting through hole (11), and the bottom of the inner core (402) abuts against the top of the mounting block (7).

8. The hydraulic suspension according to claim 7, characterized in that: The bottom of the inner core (402) is provided with a positioning protrusion (12), and the mounting block (7) is provided with a positioning groove (13) for the positioning protrusion (12) to be inserted and fitted.

9. The hydraulic suspension according to any one of claims 3 to 8, characterized in that: The inner core (402) includes a cylindrical portion (4021) and a frustum portion (4022) distributed from top to bottom. The small-diameter end of the frustum portion (4022) is connected to the lower end of the cylindrical portion (4021). The upper part of the upper main spring body (401) extends and wraps around the outside of the cylindrical portion (4021), and the lower part extends and wraps around the outside of the frustum portion (4022).

10. The hydraulic suspension according to claim 1, characterized in that: The lower rubber main spring (5) has a third limiting part (16) protruding outward on both sides of its outer wall for limiting the left and right movement of the support arm (6), and the third limiting part (16) is a rubber part integrally injection molded with the lower rubber main spring (5).

Images