Improved torsion beam hydraulic bushing

Abstract

The utility model provides an improved torsion beam hydraulic bushing belongs to the technical field of automobile parts, it has solved the problem that the existing torsion beam bushing cannot adjust the curve interval of axial rigidity. The utility model relates to an improved torsion beam hydraulic bushing including hydraulic assembly, elastic component, lower cover, upper cover, rubber body, rigid block and preset distance. In the utility model, when the vehicle is in the process of driving and the axle body moves along the central axis of the bushing to the direction of lower cover with the upper cover, the rubber body is deformed under stress, the upper cover will be subjected to the counterforce of the rubber body, and when the upper cover extrudes the rigid block, the axial rigidity of the rubber body suddenly increases, that is, the ratio of the counterforce and the distance of the upper cover moving down rises, the rigidity curve becomes steep, enters the nonlinear section, in other words, the upper cover is less likely to descend, the rubber body is less likely to deform, so that the rubber body can brake the moving distance of the axle body more quickly.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts technology and relates to an improved torsion beam hydraulic bushing. Background Technology

[0002] The torsion beam suspension is a key component of a car, its main function being to balance the vertical movement of the left and right wheels, reducing vehicle sway and maintaining a smooth ride. The torsion beam suspension consists of a torsion beam and bushings, with the bushings connecting the torsion beam to the vehicle body. Specifically, a spindle (or mounting bolt / pin) on the vehicle body passes through a central hole in the bushing, and the torsion beam connects to the side of the bushing. When the vehicle corners, the bushings deform to adapt to changes in suspension geometry, thus providing good handling stability and ride comfort. However, conventional bushing designs often only focus on the connection between the bushing and the torsion beam, frequently neglecting the connection between the vehicle body and the bushing. Consequently, when the vehicle body moves axially relative to the bushing, the axial stiffness curve of the bushing cannot be adjusted, thus affecting the vehicle's dynamic performance. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing an improved torsion beam hydraulic bushing with adjustable axial stiffness within a curved range.

[0004] The objective of this utility model can be achieved through the following technical solution: an improved torsion beam hydraulic bushing, comprising: Hydraulic components; An elastic component is disposed at one end of a hydraulic component. The elastic component includes a lower cover plate connected to the hydraulic component. An upper cover plate is provided on the lower cover plate. The upper cover plate and the lower cover plate are connected by a rubber body. The side of the rubber body is surrounded by a plurality of rigid blocks for increasing the rigidity of the rubber body. The rigid blocks are connected to the lower cover plate. A preset distance is provided between the rigid blocks and the upper cover plate. Each rigid block is detachably connected to an adjusting shell for adjusting the distance between the rigid block and the upper cover plate. Each adjusting shell covers the corresponding rigid block.

[0005] In the aforementioned improved torsion beam hydraulic bushing, the vertical cross-section of each rigid block is triangular, the rigid block is integrally formed with the rubber body, and the bottom surface of the lower cover plate is surrounded by multiple partitions around its center, with multiple positioning grooves between adjacent partitions.

[0006] In the above-mentioned improved torsion beam hydraulic bushing, a slot is provided between the top of each rigid block and the rubber body, and a locking plate is provided on the side of each adjusting shell near the rubber body. The locking plate is inserted into the corresponding slot, and an anti-detachment block is provided on the side of the rigid body away from the rubber body. Each anti-detachment block passes through the corresponding adjusting shell.

[0007] In the above-mentioned improved torsion beam hydraulic bushing, the hydraulic component includes an inner tube body, the side of which is surrounded by a vulcanized body, and the outer surface of the vulcanized body is provided with a pair of chambers, which are connected by a fluid guide, and the fluid guide is fixed to the outer surface of the vulcanized body.

[0008] In the above-mentioned improved torsion beam hydraulic bushing, the two chambers are symmetrical about the central axis of the inner tube, the guide fluid is provided with a connecting hole that communicates with the corresponding chamber, and the outer surface of the guide fluid is provided with a flow channel that connects the two connecting holes.

[0009] In the above-mentioned improved torsion beam hydraulic bushing, the two ends of the guide fluid are respectively provided with locking blocks, the vulcanized body is provided with locking grooves for installing the corresponding locking blocks, the guide fluid is provided with protrusions of the same number as the chambers, the protrusions are embedded in the corresponding chambers, and each of the connecting holes is located on the corresponding protrusion.

[0010] In the above-mentioned improved torsion beam hydraulic bushing, a pressure relief assembly is provided on the outer surface of the vulcanized body to separate two chambers. The pressure relief assembly does not contact the fluid guide. Two channel groups are provided on the outer surface of the vulcanized body. One channel group is connected to one of the chambers, and the other channel group is connected to the other chamber. The two channel groups are located on both sides of the pressure relief assembly.

[0011] In the aforementioned improved torsion beam hydraulic bushing, the pressure relief assembly includes an upper pressure relief plate and a lower pressure relief plate. The upper pressure relief plate is inclined relative to the vulcanized body and faces one of the chambers, while the lower pressure relief plate is inclined relative to the vulcanized body and faces the other chamber.

[0012] In the aforementioned improved torsion beam hydraulic bushing, support blocks are provided between the side of the upper pressure relief plate facing the corresponding chamber and the vulcanized body, and between the side of the lower pressure relief plate facing the corresponding chamber and the vulcanized body. Curved surfaces are provided between the other side of the upper pressure relief plate and the vulcanized body, and between the other side of the lower pressure relief plate and the vulcanized body.

[0013] In the aforementioned improved torsion beam hydraulic bushing, the upper cover plate has a perforation, and the vulcanized body has multiple positioning blocks on one end face facing the lower cover plate, each positioning block being inserted into a corresponding positioning groove; one end of the inner tube is inserted into the rubber body, and the central axis of the inner tube is coaxial with the perforation; the outer surface of the vulcanized body is covered with an outer sleeve, and a rim is provided at one edge of the outer sleeve, which presses the lower cover plate inside the outer sleeve.

[0014] Compared with the prior art, the present invention has the following beneficial effects: In this invention, when the vehicle is in motion and the axle, carrying the upper cover plate, moves downwards along the central axis of the bushing towards the lower cover plate, the rubber body deforms under stress. The upper cover plate then experiences a reaction force from the rubber body. Furthermore, when the upper cover plate presses against the rigid block, the axial stiffness of the rubber body suddenly increases. That is, the ratio of the reaction force to the downward movement distance of the upper cover plate increases, the stiffness curve becomes steeper, and it enters the nonlinear segment. In other words, the upper cover plate is less likely to descend, and the rubber body is less likely to deform. This allows the rubber body to brake the movement distance of the axle more quickly, thereby enhancing the dynamic performance of the vehicle. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of a preferred embodiment of the present invention.

[0016] Figure 2 This is a schematic diagram of the structure of the elastic component.

[0017] Figure 3 This is a diagram showing the combination of the hydraulic components and the outer casing.

[0018] Figure 4 This is a schematic diagram of the hydraulic assembly.

[0019] Figure 5 yes Figure 4 A schematic diagram of the structure after the fluid guide is removed.

[0020] Figure 6 yes Figure 5 A structural diagram from another perspective.

[0021] Figure 7 yes Figure 3 A structural diagram from another perspective.

[0022] Figure 8 This is a schematic diagram of the fluid-conducting structure.

[0023] Figure 9 yes Figure 1 Sectional view at AA.

[0024] Figure 10 This is a schematic diagram of the structure in which the adjusting shell is installed on the rigid block. Detailed Implementation

[0025] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0026] like Figure 1 — Figure 2 and Figure 9-10As shown, the improved torsion beam hydraulic bushing of this utility model includes a hydraulic component 100, an elastic component 200, a lower cover plate 210, an upper cover plate 220, a rubber body 230, and a rigid block 231.

[0027] An elastic component 200 is disposed at one end of a hydraulic component 100. The elastic component 200 includes a lower cover plate 210 connected to the hydraulic component 100. An upper cover plate 220 is provided on the lower cover plate 210. The upper cover plate 220 and the lower cover plate 210 are connected by a rubber body 230. The side of the rubber body 230 is surrounded by a plurality of rigid blocks 231 for increasing the rigidity of the rubber body 230. The rigid blocks 231 are fixedly connected to the lower cover plate 210 and the upper cover plate 220. A preset distance 232 is provided between 220. During installation, the axle on the frame needs to pass through the entire bushing, and the end of the axle needs to abut against the side of the upper cover plate away from the lower cover plate. The hydraulic assembly 100 is installed on the torsion beam. When the vehicle is in motion and the axle carries the upper cover plate 220 to move towards the lower cover plate 210 along the central axis of the bushing, the rubber body 230 is deformed by force, and the upper cover plate 220 will be subjected to the reaction force of the rubber body 230. Because of the distance between the upper cover plate 220 and the rigid block 231... There is a preset distance 232. The upper cover plate 220 will first travel the preset distance 232. During this process, as the displacement increases, the reaction force generated by the rubber body 230 on the upper cover plate 220 will increase linearly. That is, the reaction force is proportional to the downward distance of the upper cover plate 220. The rigid block 231 remains stationary relative to the lower cover plate. When the upper cover plate 220 contacts the top of the rigid block 231, the rigid block 231 increases the rigidity of the rubber body 230. Thus, when the upper cover plate 220 compresses the rigid block 231... When the rigid block 231 is in place, the axial stiffness of the rubber body suddenly increases, that is, the ratio of the reaction force to the downward movement distance of the upper cover plate increases, the stiffness curve becomes steeper, and it enters the nonlinear segment. In other words, the reaction force generated by the rubber body 230 on the upper cover plate 220 increases, the upper cover plate 220 is less likely to descend, and the rubber body 230 is less likely to deform. Compared with the absence of the rigid block 231, the downward movement distance of the upper cover plate 220 is reduced, thereby enabling the rubber body 230 to brake the movement distance of the shaft more quickly.

[0028] Furthermore, people can adjust the height of the rigid block 231 appropriately according to the actual situation to increase or decrease the value of the preset distance 232, thereby effectively controlling the curve range of the bushing axial stiffness during the movement of the upper cover plate 220 to the lower cover plate 210.

[0029] Each rigid block 231 is detachably connected to an adjusting shell 300 for adjusting the distance between the rigid block 231 and the upper cover plate. Each adjusting shell 300 covers the corresponding rigid block 231. The adjusting shell 300 is made of the same material as the rigid block 231. When the height of the rigid block 231 is insufficient or the rigid block 231 is worn after long-term use, a suitable adjusting shell 300 can be selected according to actual needs and covered on the corresponding rigid block 231 until the inner wall of the adjusting shell 300 is always in close contact with the surface of the rigid block 231, so that the adjusting shell 300 and the rigid block 231 form a whole. In this way, the preset distance height can be adjusted. Secondly, during the manufacturing process of the adjusting shell 300, the thickness of the adjusting shell 300 located between the rigid block 231 and the upper cover plate can be set to different values ​​so that the manufactured adjusting shell 300 can meet the installation requirements.

[0030] Each rigid block 231 has a slot 2311 between its top and the rubber body. Each adjusting shell 300 has a locking plate 310 on the side near the rubber body. The locking plate 310 is inserted into the corresponding slot 2311. The rigid body has an anti-detachment block 2312 on the side away from the rubber body. Each anti-detachment block 2312 passes through the corresponding adjusting shell 300. During installation, the adjusting shell 300 needs to be placed over the corresponding rigid block 231. In this process, the locking plate 310 of the adjusting shell 300 needs to be inserted into the corresponding slot 2311, and the anti-detachment block 2312 needs to pass through the hole (not shown in the figure) on the adjusting shell 300. This completes the locking of the adjusting shell 300 onto the corresponding rigid block 231, so that the adjusting shell 300 is stably covered on the rigid block 231 and prevents the adjusting shell 300 from detaching from the rigid block 231.

[0031] The upper cover plate and the lower cover plate are coaxially arranged. The vertical cross section of each rigid block 231 is triangular. The vertical cross section passes through the central axis of the upper cover plate. The shape of the rigid block 231 can further enhance the stability of the rigid block 231 and also effectively enhance the rigidity of the rubber body 230. The rigid block 231 and the rubber body 230 are integrally formed. Specifically, the rigid block 231 and the rubber body 230 are integrally vulcanized.

[0032] like Figure 2 — Figure 9As shown, the hydraulic assembly 100 includes an inner tube 110. A vulcanized body 120 is provided around the side of the inner tube 110. The vulcanized body 120 is coaxially arranged with the inner tube 110. A pair of chambers 121 are provided on the outer surface of the vulcanized body 120. The two chambers 121 are symmetrical about the central axis of the inner tube 110 and are connected by a fluid guide 130. The fluid guide 130 is engaged with the outer surface of the vulcanized body 120. When the side of the hydraulic assembly 100 is subjected to compressive force, i.e., when the side of the vulcanized body 120 is subjected to compressive force, one of the chambers... 121 may be subjected to compression, or the two chambers 121 may be subjected to compression by different forces. Since the two chambers 121 are connected by the fluid guide 130, the chamber 121 that is being compressed or that is subjected to greater compression force will move the liquid inside it to the other chamber 121 through the fluid guide 130 until the hydraulic pressure in the two chambers 121 continues to reach equilibrium. In this way, the impact force on the hydraulic pressure assembly 100 can be effectively buffered. Furthermore, the interior of the vulcanized body is solid, which can prevent external water from entering the interior of the vulcanized body and effectively prevent the risk of abnormal noise after the liner is installed in the vehicle and driven through water.

[0033] The fluid guide 130 is provided with a connecting hole 131 that communicates with the corresponding chamber 121. The outer surface of the fluid guide 130 is provided with a flow channel 132 that connects the two connecting holes 131. When the hydraulic pressure in one chamber 121 is greater than that in the other chamber 121, the chamber 121 with the greater hydraulic pressure will discharge its internal liquid through the connecting hole 131 to the flow channel 132. Because the flow channel 132 communicates with both connecting holes 131, the liquid in the flow channel 132 can flow through the other connecting hole 131 to... Within the chamber 121 with lower hydraulic pressure, hydraulic balance between the two chambers 121 can be achieved. Furthermore, when designing the connecting hole 131, its position can be changed according to actual needs, that is, the connecting hole 131 can be moved laterally relative to the guide fluid 130. During this process, the flow channel 132 is always connected to the connecting hole 131, and the two connecting holes 131 are always connected to the corresponding chamber 121. In this way, the length of the flow channel 132 can be increased or decreased to strengthen or weaken the resistance when the liquid flows through the guide fluid 130.

[0034] Furthermore, the fluid guide 130 is provided with locking blocks 133 at both ends, and the vulcanized body 120 is provided with locking grooves 122 for installing the corresponding locking blocks 133. The fluid guide 130 is provided with protrusions 134 in the same number as the chambers 121. The protrusions 134 are embedded in the corresponding chambers 121, and each of the connecting holes 131 is located on the corresponding protrusions 134. During installation, the fluid guide 130 needs to be locked onto the vulcanized body 120. Specifically, two protrusions 134 need to be locked into the corresponding chambers 121 respectively, leaving a certain space between the chambers 121 and the protrusions 134 for filling with liquid. After that, the locking blocks 133 need to be locked into the corresponding locking grooves 122. In this way, the fluid guide 130 can be locked onto the vulcanized body 120.

[0035] A pressure relief assembly 123 is provided on the outer surface of the vulcanizate 120, separating two chambers 121. The pressure relief assembly 123 is not in contact with the fluid guide 130. Two channel groups 124 are provided on the outer surface of the vulcanizate 120. One channel group 124 communicates with one chamber 121, and the other channel group 124 communicates with the other chamber 121. The two channel groups 124 are located on opposite sides of the pressure relief assembly 123, which is situated between the two chambers 121. When the hydraulic pressure in one chamber 121 exceeds the pressure resistance of the fluid guide 130 to the liquid... When the conveying capacity is reached, the liquid in the chamber 121 overflows into the channel group 124 connected to the chamber 121. Then, the liquid in the channel group 124 applies pressure to the hydraulic component 100. When the pressure applied to the pressure relief component 123 reaches a predetermined value, the hydraulic component 100 opens, and the liquid in the channel group 124 passes over the pressure relief component 123 to reach another channel group 124. Then, it flows into another chamber 121 to quickly achieve the balance of the two chambers 121. In this way, the pressure relief function of the chamber 121 can be realized.

[0036] Furthermore, the pressure relief assembly 123 includes an upper pressure relief plate 1231 and a lower pressure relief plate 1232. The upper pressure relief plate 1231 is inclined relative to the vulcanized body 120 and faces one of the chambers 121. The lower pressure relief plate 1232 is inclined relative to the vulcanized body 120 and faces the other chamber 121. Each channel group 124 includes a first channel 1241 and a second channel 1242. The two first channels 1241 are at different heights on the vulcanized body 120, and the two second channels 1242 are at different heights on the vulcanized body 120. The higher first channel 1241 and the higher second channel 1242 are at the same height. A first channel 1241 and a second channel 1242 are at the same height. One first channel 1241 and one second channel 1242 are located on either side of the upper pressure relief plate 1231, and the other first channel 1241 and the other second channel 1242 are located on either side of the lower pressure relief plate 1232. The vulcanized body 120 is provided with two bridge blocks 125, which are located on either side of the pressure relief assembly 123 and connected to the connection between the upper pressure relief plate 1231 and the lower pressure relief plate 1232. Specifically, the two chambers 121 can be named the first chamber 121 and the second chamber 121, respectively. The first chamber 121 is located on the left side of the pressure relief assembly 123. On the side, the second chamber 121 is located on the right side of the pressure relief assembly 123. The upper pressure relief plate 1231 faces the second chamber 121, and the lower pressure relief plate 1232 faces the first chamber 121. Both first channels 1241 are connected to the first chamber 121, and both second channels 1242 are connected to the second chamber 121. Therefore, when the hydraulic pressure in the first chamber 121 is greater than that in the second chamber 121 and the guide fluid 130 cannot guide the flow in time, the liquid in the first chamber 121 will flow into the higher first channel 1241 and squeeze the upper pressure relief plate 1231. When the squeezing force on the upper pressure relief plate 1231 reaches the pressure value it can withstand, the liquid in the upper pressure relief plate 1231 flows into the second chamber 121. The tilting of the upper pressure plate 1231 causes deformation, allowing the liquid in the higher first channel 1241 to smoothly pass over the upper pressure plate 1231 and enter the higher second channel 1242, and then enter the second chamber 121 from the second channel 1242. Similarly, when the hydraulic pressure in the second chamber 121 is greater than that in the first chamber 121 and the guide fluid 130 cannot guide the flow in time, the hydraulic pressure in the second chamber 121 will pass through the lower second channel 1242, over the lower pressure plate 1232, and the lower first channel 1241 in sequence, and finally enter the first chamber 121. In this way, the first chamber 121 and the second chamber 121 can be quickly balanced.

[0037] Furthermore, support blocks 126 are provided between the side of the upper pressure relief plate 1231 facing the corresponding chamber 121 and the vulcanized body 120, and between the side of the lower pressure relief plate 1232 facing the corresponding chamber 121 and the vulcanized body 120. Curved surfaces 127 are provided between the other side of the upper pressure relief plate 1231 and the vulcanized body 120, and between the other side of the lower pressure relief plate 1232 and the vulcanized body 120. By providing support blocks 126, the connection strength between the upper pressure relief plate 1231 and the vulcanized body 120, and between the lower pressure relief plate 1232 and the vulcanized body 120 can be effectively enhanced. Through the action of the curved surface 127, the impact force of the buffer body on the upper pressure relief plate 1231 or the lower pressure relief plate 1232 can be buffered.

[0038] The upper cover plate 220 has a perforation 221, allowing one end of the inner tube 110 to be inserted into the rubber body 230. The central axis of the inner tube 110 is coaxial with the perforation 221. The outer surface of the vulcanized body 120 is covered by an outer sleeve 140, with a rim 141 surrounding one edge of the outer sleeve 140. The rim 141 presses the lower cover plate 210 into the outer sleeve 140. During assembly, the vulcanized body 120 must first be installed into the outer sleeve 140. Afterward, the elastic component 200 must be positioned on top of the vulcanized body 120, and the top end of the inner tube 110 must be inserted into the rubber body 230. Inside the colloid 230, until the bottom surface of the lower cover plate 210 abuts against the top surface of the vulcanized body 120, at this point, the top of the outer sleeve 140 will exceed the height of the lower cover plate 210. Then, the top of the outer sleeve 140 is folded inward using a riveting process, so that the lower cover plate 210 can be pressed inside the outer sleeve 140, thereby connecting the elastic component 200 and the hydraulic component 100 together, and allowing the upper cover plate 220 to move relative to the lower cover plate 210. Secondly, since the elastic component and the hydraulic component are designed independently, the axial stiffness of the bushing can be adjusted by adjusting the height of the rigid block 231 during the manufacturing process.

[0039] Furthermore, when the vulcanizate 120 is installed inside the outer casing 140, both the upper pressure relief plate 1231 and the lower pressure relief plate 1232 are tightly attached to the outer casing 140 to prevent the liquid located on the left and right sides of the pressure relief assembly 123 from directly passing over the upper pressure relief plate 1231 or the lower pressure relief plate 1232; in addition, the outer side of the guide fluid 130 is also tightly attached to the inner wall of the outer casing 140 so that the liquid located in the flow channel 132 will not overflow through the side of the flow channel 132.

[0040] The bottom surface of the lower cover plate 210 is provided with multiple partitions 211 around its center, and multiple positioning grooves 212 are provided between two adjacent partitions 211. Multiple positioning blocks 128 are provided on one end face of the vulcanized body 120 facing the lower cover plate 210. When the lower cover plate 210 is placed on the upper end face of the vulcanized body 120, each positioning block 128 is inserted into the corresponding positioning groove 212 until the lower cover plate 210 abuts against the end face of the vulcanized body 120, so that the elastic component 200 can be installed on the vulcanized body 120.

[0041] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this utility model are only used to explain the relative positional relationship and movement of the components in a specific posture (as shown in the attached figure). If the specific posture changes, the directional indication will also change accordingly. Furthermore, descriptions involving "first," "second," or "a" in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. An improved torsion beam hydraulic bushing, characterized in that, include: Hydraulic components; An elastic component is disposed at one end of a hydraulic component. The elastic component includes a lower cover plate connected to the hydraulic component. An upper cover plate is provided on the lower cover plate. The upper cover plate and the lower cover plate are connected by a rubber body. The side of the rubber body is surrounded by a plurality of rigid blocks for increasing the rigidity of the rubber body. The rigid blocks are connected to the lower cover plate. A preset distance is provided between the rigid blocks and the upper cover plate. Each rigid block is detachably connected to an adjusting shell for adjusting the distance between the rigid block and the upper cover plate. Each adjusting shell covers the corresponding rigid block.

2. The improved torsion beam hydraulic bushing according to claim 1, characterized in that, Each rigid block has a triangular vertical cross section. The rigid block is integrally formed with the rubber body. The bottom surface of the lower cover plate is surrounded by multiple partitions around its center, and multiple positioning grooves are provided between two adjacent partitions.

3. The improved torsion beam hydraulic bushing according to claim 1, characterized in that, Each rigid block has a slot between its top and the rubber body, and each adjusting shell has a locking plate on the side near the rubber body. The locking plate is inserted into the corresponding slot. Each rigid block has an anti-detachment block on the side away from the rubber body, and each anti-detachment block passes through the corresponding adjusting shell.

4. The improved torsion beam hydraulic bushing according to claim 1, characterized in that, The hydraulic assembly includes an inner tube body, the side of which is surrounded by a vulcanized body. The outer surface of the vulcanized body is provided with a pair of chambers, which are connected by a fluid guide. The fluid guide is fixed to the outer surface of the vulcanized body.

5. An improved torsion beam hydraulic bushing according to claim 4, characterized in that, The two chambers are symmetrical about the central axis of the inner tube. The guide tube is provided with a connecting hole that communicates with the corresponding chamber. The outer surface of the guide tube is provided with a flow channel that connects the two connecting holes.

6. The improved torsion beam hydraulic bushing according to claim 5, characterized in that, The guide fluid is provided with a locking block at both ends, the vulcanized body is provided with a locking groove for installing the corresponding locking block, the guide fluid is provided with a number of protrusions the same as the number of chambers, the protrusions are embedded in the corresponding chambers, and each of the connecting holes is located on the corresponding protrusion.

7. An improved torsion beam hydraulic bushing according to claim 4, characterized in that, The outer surface of the vulcanized body is provided with a pressure relief assembly that separates the two chambers. The pressure relief assembly does not contact the fluid. The outer surface of the vulcanized body is provided with two channel groups, one of which is connected to one of the chambers and the other is connected to the other chamber. The two channel groups are located on both sides of the pressure relief assembly.

8. An improved torsion beam hydraulic bushing according to claim 7, characterized in that, The pressure relief assembly includes an upper pressure relief plate and a lower pressure relief plate. The upper pressure relief plate is inclined relative to the vulcanized body and faces one of the chambers. The lower pressure relief plate is inclined relative to the vulcanized body and faces the other chamber.

9. An improved torsion beam hydraulic bushing according to claim 8, characterized in that, Support blocks are provided between the side of the upper pressure relief plate facing the corresponding chamber and the vulcanized body, and between the side of the lower pressure relief plate facing the corresponding chamber and the vulcanized body. Curved surfaces are provided between the other side of the upper pressure relief plate and the vulcanized body, and between the other side of the lower pressure relief plate and the vulcanized body.

10. An improved torsion beam hydraulic bushing according to claim 4, characterized in that, The upper cover plate has a perforation, and the vulcanized body has multiple positioning blocks on one end face facing the lower cover plate. Each positioning block is inserted into a corresponding positioning groove. One end of the inner tube is inserted into the rubber body, and the central axis of the inner tube is coaxial with the perforation. The outer surface of the vulcanized body is covered with an outer sleeve, and a rim is provided at one edge of the outer sleeve. The rim presses the lower cover plate inside the outer sleeve.

Images