A rubber bushing assembly device for a lower bracket of an automobile shock absorber

Abstract

A rubber bushing assembly device for a lower support of an automotive shock absorber includes a workbench. The upper surface of the workbench is provided with a rubber bushing assembly device and a lower support assembly device. The rubber bushing assembly device includes a first mounting seat disposed on the upper surface of the workbench. A locking hole is provided at the center of the upper surface of the first mounting seat. A positioning shaft that abuts against the first mounting seat is provided on the upper surface of the first mounting seat. A locking shaft matching the locking hole is provided at the center of the lower end face of the positioning shaft. A conical guide head is provided at the upper end of the positioning shaft. This invention's rubber bushing assembly device for the lower support of an automotive shock absorber not only avoids localized tearing due to excessive stretching or shearing during the assembly of the outer bushing, inner bushing, and lower support, but also ensures uniform deformation of the outer bushing after assembly, while maintaining coaxiality between the inner and outer bushings, thus guaranteeing assembly quality.

Description

Technical Field

[0001] This utility model relates to the field of automotive shock absorbers, and in particular to a rubber bushing assembly device for the lower support of an automotive shock absorber. Background Technology

[0002] The rubber bushing inside the lower support of a car shock absorber is a key component. It can effectively absorb high-frequency vibrations transmitted from the road surface (such as bumps, gravel impacts, etc.) and reduce the transmission of vibrations to the vehicle body. The rubber bushing buffers instantaneous impacts through deformation and disperses concentrated stress to a larger area, preventing the metal support from cracking or fatigue damage due to excessive local stress. The rubber bushing consists of an outer bushing and an inner bushing.

[0003] As a core flexible connection component of the suspension system, the rubber bushing of the lower support of an automotive shock absorber directly affects the vehicle's NVH performance, handling stability, and component durability. This bushing requires precise interference fit to achieve a three-body coupling connection between the inner bushing (metal / engineering plastic), the outer bushing (rubber matrix), and the lower support (metal shell), forming a composite structure with multi-directional damping characteristics. In traditional assembly processes, because the outer diameter of the outer bushing in its free state is significantly larger than the inner diameter of the lower support mounting hole, and the outer diameter of the inner bushing is larger than the inner diameter of the outer bushing, the assembly process requires applying high-strength mechanical extrusion to the rubber material, leading to the following technical bottlenecks:

[0004] First, during radial compression, the rubber molecular chains of the outer bushing are prone to local tearing due to excessive stretching or shearing. Second, forced insertion causes non-uniform deformation of the contact surface between the outer bushing and the lower support, disrupting the preset interference distribution, reducing the circumferential clamping force between the bushing and the support, and causing fretting wear during service. Third, manual operation makes it difficult to synchronously control the coaxiality between the inner and outer bushings, affecting assembly accuracy. Summary of the Invention

[0005] The present invention aims to solve the existing technical problem by providing a rubber bushing assembly device for the lower support of an automotive shock absorber. This device not only avoids localized tearing caused by excessive stretching or shearing during the assembly of the outer bushing, inner bushing, and lower support, but also ensures that the outer bushing deforms uniformly after assembly, while maintaining the coaxiality between the inner and outer bushings and ensuring assembly quality.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0007] This utility model discloses a rubber bushing assembly device for a lower support of an automotive shock absorber, including a workbench. The upper surface of the workbench is provided with a rubber bushing assembly device and a lower support assembly device. The rubber bushing assembly device includes a first mounting seat on the upper surface of the workbench. A locking hole is provided at the center of the upper surface of the first mounting seat. A positioning shaft that fits against the first mounting seat is provided on the upper surface of the first mounting seat. A locking shaft matching the locking hole is provided at the center of the lower end face of the positioning shaft. A conical guide head is provided at the upper end of the positioning shaft, the diameter of which gradually decreases from bottom to top, and the lower end diameter of the guide head is larger than the diameter of the positioning shaft. An inner bushing, fitted outside the positioning shaft, is provided between the upper surface of the first mounting seat and the lower end face of the guide head. A first extrusion shaft is located above the guide head. The first extrusion shaft can extrude downwards to press the outer bushing, causing the outer bushing to move downwards along the trajectory of the outer wall of the guide head and fit over the outer bushing.

[0008] The lower end face of the first extrusion shaft is provided with a first receiving hole at its center. The diameter of the first receiving hole is larger than the outer diameter of the lower end of the inlet head. The diameter of the first receiving hole is smaller than the outer diameter of the outer bushing. The upper end diameter of the inlet head is smaller than the inner diameter of the outer bushing.

[0009] The outer diameter of the inner liner is the same as the diameter of the lower end of the inlet head.

[0010] The lower support assembly device includes a second mounting base disposed on the upper surface of the workbench; a lower slot is provided at the center of the upper surface of the second mounting base; a movable hole is provided at the center of the bottom of the lower slot; an inlet seat is provided directly above the second mounting base; an upper slot is provided at the center of the lower surface of the inlet seat, which is opposite to the lower slot; a lower support is provided between the bottom of the upper slot and the bottom of the lower slot; an inlet hole that is wider at the top and narrower at the bottom is provided at the center of the upper surface of the inlet seat; a pressing hole that matches the outer bushing is provided at the bottom of the inlet hole; a shaping hole that is wider at the top and narrower at the bottom is provided at the bottom of the pressing hole; an outlet hole that communicates with the lower end of the shaping hole is provided at the center of the bottom of the lower slot; a second extrusion shaft coaxial with the inlet seat is provided above the inlet seat; the outer diameter of the second extrusion shaft is smaller than the diameter of the pressing hole.

[0011] The inner wall of the outlet hole is coplanar with the inner wall of the lower support.

[0012] The lower end face of the second extrusion shaft is provided with a second receiving hole, the diameter of which is larger than the outer diameter of the inner bushing.

[0013] The inner wall of the second receiving hole is provided with at least one recessed hole; a matching magnet is provided in the recessed hole, and the magnet can attract the inner liner.

[0014] The beneficial effects of this utility model are:

[0015] Compared with existing technologies, the rubber bushing assembly equipment for the lower support of an automotive shock absorber using this invention can gradually enlarge the inner hole of the outer bushing to a diameter that matches the inner bushing through the guide head of the rubber bushing assembly device, thus smoothly completing the assembly of the outer and inner bushings to form a finished rubber bushing. When the rubber bushing needs to be assembled into the lower support, the outer bushing can be gradually narrowed to a size that matches the inner diameter of the lower support using the shaping hole, thus smoothly completing the assembly of the rubber bushing and the lower support. The deformation of the rubber bushing during the rubber bushing assembly and the lower support assembly is gradual, rather than using a forced deformation method, thus effectively avoiding localized tearing caused by excessive stretching or shearing when assembling the outer bushing, inner bushing, and lower support. At the same time, it can ensure that the outer bushing can deform evenly after assembly, while ensuring the coaxiality between the inner and outer bushings, thus ensuring assembly quality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the rubber bushing assembly equipment for the lower support of the automobile shock absorber according to this utility model;

[0017] Figure 2 This is a schematic diagram of the process when the rubber bushing fitting device fits the outer bushing onto the outer bushing;

[0018] Figure 3 This is a schematic diagram of the process when the lower support assembly device assembles the rubber bushing into the lower support. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0020] Please see Figures 1 to 3This utility model provides a rubber bushing assembly device for the lower support of an automotive shock absorber, including a workbench 6. The upper surface of the workbench 6 is provided with a rubber bushing assembly device and a lower support assembly device. The rubber bushing assembly device includes a first mounting base 302 disposed on the upper surface of the workbench 6; a locking hole 303 is provided at the center of the upper surface of the first mounting base 302; a positioning shaft 304 is provided on the upper surface of the first mounting base 302 to fit therewith; a locking shaft 305 matching the locking hole 303 is provided at the center of the lower end face of the positioning shaft 304; the positioning shaft 305... The upper end of the positioning shaft 304 is provided with a conical guide head 306, the diameter of which gradually decreases from bottom to top, and the lower diameter of the guide head 306 is larger than the diameter of the positioning shaft 304; an inner bushing 102 is provided between the upper surface of the first mounting base 302 and the lower end face of the guide head 306, which is fitted outside the positioning shaft 304; a first extrusion shaft 307 is provided above the guide head 306; the first extrusion shaft 307 can extrude the outer bushing 101 downward, so that the outer bushing 101 moves downward along the trajectory of the outer wall of the guide head 306 and is fitted outside the outer bushing 101.

[0021] The lower end face of the first extrusion shaft 307 is provided with a first receiving hole 308. The diameter of the first receiving hole 308 is larger than the outer diameter of the lower end of the inlet head 306. The diameter of the first receiving hole 308 is smaller than the outer diameter of the outer bushing 101. The upper end diameter of the inlet head 306 is smaller than the inner diameter of the outer bushing 101.

[0022] The outer diameter of the inner liner 102 is the same as the diameter of the lower end of the inlet head 306.

[0023] The lower support assembly device includes a second mounting base 501 disposed on the upper surface of the workbench 6; a lower slot 502 is provided at the center of the upper surface of the second mounting base 501; a movable hole 503 is provided at the center of the bottom of the lower slot 502; a guide seat 504 is provided directly above the second mounting base 501; an upper slot 505 is provided at the center of the lower surface of the guide seat 504, which is opposite to the lower slot 502; a lower support 2 is provided between the bottom of the upper slot 505 and the bottom of the lower slot 502; the guide seat The upper surface of 504 has a center of an inlet hole 506 that is wider at the top and narrower at the bottom; the bottom of the inlet hole 506 has a pressing hole 507 that matches the outer bushing 101; the bottom of the pressing hole 507 has a shaping hole 508 that is wider at the top and narrower at the bottom; the center of the bottom of the lower slot 502 has an outlet hole 509 that communicates with the lower end of the shaping hole 508; the upper part of the inlet seat 504 has a second extrusion shaft 510 that is coaxial with it; the outer diameter of the second extrusion shaft 510 is smaller than the diameter of the pressing hole 507.

[0024] The inner wall of the outlet hole 509 is coplanar with the inner wall of the lower support 2.

[0025] The lower end face of the second extrusion shaft 510 is provided with a second receiving hole 511, the diameter of which is larger than the outer diameter of the inner bushing 102.

[0026] The inner wall of the second receiving hole 511 is provided with at least one embedding hole 512; the embedding hole 512 is provided with a matching magnet 513, which can attract the inner liner 102.

[0027] The method of using this utility model is as follows:

[0028] The upper ends of both the first extrusion shaft 307 and the second extrusion shaft 510 can be connected to actuators in existing drive systems, such as cylinders or hydraulic cylinders. In this case, the first extrusion shaft 307 and the second extrusion shaft 510 can convert the power of compressed air or hydraulic oil into their own linear mechanical motion.

[0029] When the outer bushing 101 and the inner bushing 102 need to be assembled into a rubber bushing 1, simply place the inner bushing 102 between the lower end face of the guide head 306 and the upper surface of the first mounting base 302. At the same time, the inner bushing 102 is fitted over the positioning shaft 304, which then positions the inner bushing 102. Next, simply place the outer bushing 101 on the upper end of the guide head 306, so that the upper end of the guide head 306 enters the lower end opening of the inner hole of the outer bushing 101. As the first extrusion shaft 307 moves downward, the lower end face of the first extrusion shaft 307 will press downward against the upper end face of the outer bushing 101. At this moment, the outer bushing 101 moves downward, which indirectly causes the guide head to pass upward through the inner hole of the outer bushing 101. The conical guide head 306 will then use the shape of its outer wall to gradually push the downward-moving guide head upward. The inner hole of the movable outer bushing 101 is opened, rather than forcibly opened. When the outer bushing 101 moves down to below the inlet head 306, the outer bushing 101 is directly fitted over the inner bushing 102. The presence of the first receiving hole 308 can be used to accommodate the inlet head 306, ensuring that the first extrusion shaft 307 can press the outer bushing 101 into place, so that the outer bushing 101 is stably fitted over the inner bushing 102, completing the assembly between the outer bushing 101 and the inner bushing 102. After the assembly is completed, the first extrusion shaft 307 can be moved up and reset. Then, the inlet head 306 is held and the locking shaft 305 is pulled out from the locking hole 303. Then, the inner bushing 102 with the outer bushing 101 already assembled is pulled out from the positioning shaft 304. The finished rubber bushing 1 can then be collected for the next assembly step.

[0030] When the rubber bushing 1 needs to be assembled into the lower support 2, the lower end of the lower support 2 can be first inserted into the lower slot 502 on the upper surface of the second mounting base 501 to complete the initial positioning of the lower support 2. Then, the guide seat 504 can be placed above the lower support 2, and the upper end of the lower support 2 can be inserted into the upper slot 505 to achieve further positioning of the lower support 2. Next, the rubber bushing 1 can be inserted into the guide hole 506. Since the guide hole 506 is a cone shape that is wider at the top and narrower at the bottom, when the second extrusion shaft 510 moves downward, the second extrusion shaft 510 will press the upper surface of the outer bushing 101 downward through its own lower end surface. The second receiving hole 511 can be used to receive the part of the inner bushing 102 that protrudes into the outer bushing 101, avoiding force on the inner bushing 102 and ensuring that the pressing action is completed smoothly. As the rubber bushing 1 is continuously pressed down, the guide hole 506 will guide the rubber bushing 1 into the pressing hole. 507. During the process of the rubber bushing 1 passing through the pressing hole, the rubber bushing 1 gradually adjusts its own state to avoid tilting. When the rubber bushing 1 moves down into the shaping hole, since the shaping hole 508 is funnel-shaped with a wider top and a narrower bottom, and the upper diameter of the shaping hole 508 is the same as the lower diameter of the pressing hole 507, as the rubber bushing 1 passes through the shaping hole 508, the shaping hole 508 will gradually squeeze the outer bushing 101 inward through its own inner wall, so that the outer bushing 101 gradually narrows and is finally squeezed into the lower support 2 through the outlet hole 509. As the second extrusion shaft 510 moves down into place, the rubber bushing 1 will be assembled into the lower support 2, completing the assembly work. After the assembly work is completed, the second extrusion shaft 510 moves up to reset, and then the guide seat 504 is removed upward, so that the assembled rubber bushing 1 can be easily taken out from the lower slot 502 of the second mounting seat 501.

[0031] In summary, this utility model can gradually enlarge the inner hole of the outer bushing 101 to a diameter that matches the inner bushing 102 through the guide head 306 of the rubber bushing fitting device, thereby successfully completing the assembly work between the outer bushing 101 and the inner bushing 102 to form the finished rubber bushing 1. When the rubber bushing 1 needs to be assembled into the lower support 2, the outer bushing of the rubber bushing 1 can be gradually narrowed to a size that matches the inner diameter of the lower support 2 through the shaping hole 508, thereby successfully completing the assembly work between the rubber bushing 1 and the lower support 2. The assembly work between supports 2, and the deformation of rubber bushing 1 in the assembly work of rubber bushing 1 and lower support 2 are all gradual, without forced deformation. This effectively avoids local tearing of the outer bushing 101 due to excessive stretching or shearing when assembling the inner bushing 102 and lower support 2. At the same time, it can ensure that the outer bushing 101 can deform evenly after assembly, and ensure the coaxiality between the inner bushing 102 and the outer bushing 101, thus ensuring the assembly quality.

[0032] The lower slot 502 has a movable hole 503 at the center of the bottom. The movable hole 503 can be used to accommodate the part of the inner bushing 102 that protrudes downward to the outer bushing 101, ensuring the smooth progress of the assembly work.

[0033] The outer diameter of the inner bushing 102 is the same as the lower diameter of the inlet head 306. In this case, once the rubber bushing 1 passes through the inlet head 306, it can be directly fitted onto the inner bushing 102, while effectively preventing the inlet head from excessively expanding the inner hole of the outer bushing 101.

[0034] The inner wall of the outlet hole 509 is coplanar with the inner wall of the lower support 2. In this case, not only can the stability of the rubber bushing 1 be ensured when it is assembled into the lower support 2, but the excessive inward compression of the outer bushing 101 can also be avoided.

[0035] The inner wall of the second receiving hole 511 is provided with at least one insert hole 512, and a matching magnet 513 is provided in the insert hole 512. The magnet 513 can attract the inner bushing 102. The inner bushing 102 is made of metal. Therefore, it is only necessary to insert the part of the inner bushing 102 that protrudes from the outer bushing 101 into the lower end opening of the second receiving hole 511. The magnet 513 can attract and fix the rubber bushing 1 to the second extrusion shaft 510, so that when the second extrusion shaft 510 moves down, it can drive the rubber bushing 1 to move down synchronously, further ensuring the coaxiality of the rubber bushing 1 during assembly. When the outer bushing 101 of the rubber bushing 1 deforms during the downward movement, it will generate strong resistance. This resistance will overcome the attraction of the magnet, so that the lower end face of the downward-moving second extrusion shaft 510 can finally press the outer bushing 101 downward, ensuring the smooth completion of the assembly work.

Claims

1. An assembly device for rubber bushings of the lower support of an automotive shock absorber, comprising a workbench, characterized in that: The workbench surface is provided with a rubber bushing assembly device and a lower support assembly device; the rubber bushing assembly device includes a first mounting base on the workbench surface; a locking hole is provided at the center of the upper surface of the first mounting base; a positioning shaft is provided on the upper surface of the first mounting base to fit against it; a locking shaft matching the locking hole is provided at the center of the lower end face of the positioning shaft; a conical guide head is provided at the upper end of the positioning shaft, the diameter of the guide head gradually decreases from bottom to top, and the lower end diameter of the guide head is larger than the diameter of the positioning shaft; an inner bushing sleeve is provided between the upper surface of the first mounting base and the lower end face of the guide head, which is fitted outside the positioning shaft; a first extrusion shaft is provided above the guide head; the first extrusion shaft can extrude the outer bushing downward, so that the outer bushing moves downward along the trajectory of the outer wall of the guide head and fits outside the outer bushing sleeve.

2. The rubber bushing assembly equipment for the lower support of an automotive shock absorber according to claim 1, characterized in that: The lower end face of the first extrusion shaft is provided with a first receiving hole at its center. The diameter of the first receiving hole is larger than the outer diameter of the lower end of the inlet head. The diameter of the first receiving hole is smaller than the outer diameter of the outer bushing. The upper end diameter of the inlet head is smaller than the inner diameter of the outer bushing.

3. The rubber bushing assembly equipment for the lower support of an automotive shock absorber according to claim 1, characterized in that: The outer diameter of the inner liner is the same as the diameter of the lower end of the inlet head.

4. The rubber bushing assembly equipment for the lower support of an automotive shock absorber according to claim 1, characterized in that: The lower support assembly device includes a second mounting base disposed on the upper surface of the workbench; a lower slot is provided at the center of the upper surface of the second mounting base; a movable hole is provided at the center of the bottom of the lower slot; an inlet seat is provided directly above the second mounting base; an upper slot is provided at the center of the lower surface of the inlet seat, which is opposite to the lower slot; a lower support is provided between the bottom of the upper slot and the bottom of the lower slot; an inlet hole that is wider at the top and narrower at the bottom is provided at the center of the upper surface of the inlet seat; a pressing hole that matches the outer bushing is provided at the bottom of the inlet hole; a shaping hole that is wider at the top and narrower at the bottom is provided at the bottom of the pressing hole; an outlet hole that communicates with the lower end of the shaping hole is provided at the center of the bottom of the lower slot; a second extrusion shaft coaxial with the inlet seat is provided above the inlet seat; the outer diameter of the second extrusion shaft is smaller than the diameter of the pressing hole.

5. The rubber bushing assembly equipment for the lower support of an automotive shock absorber according to claim 4, characterized in that: The inner wall of the outlet hole is coplanar with the inner wall of the lower support.

6. The rubber bushing assembly equipment for the lower support of an automotive shock absorber according to claim 4, characterized in that: The lower end face of the second extrusion shaft is provided with a second receiving hole, the diameter of which is larger than the outer diameter of the inner bushing.

7. The rubber bushing assembly equipment for the lower support of an automotive shock absorber according to claim 6, characterized in that: The inner wall of the second receiving hole is provided with at least one recessed hole; a matching magnet is provided in the recessed hole, and the magnet can attract the inner liner.

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