Special expander positioner for replacing rubber sleeve of automobile chassis shock absorber upper seat

Abstract

The utility model relates to the field of automobile maintenance tool, concretely is the special strutting positioner of automobile chassis shock absorber upper seat rubber bushing replacement, including connecting sleeve, be provided with connecting post in connecting sleeve, and the bottom fixed connection of connecting post with connecting sleeve is set up on connecting sleeve and is used for the strutting open subassembly of strutting open upper seat rubber bushing, and the adjusting assembly for adjusting strutting open subassembly is set up on connecting post, and strutting open subassembly includes two first connecting rings, two first connecting rings are longitudinally arranged, and the first connecting ring is sleeved in the circumferential side of connecting sleeve, and the circumferential side of first connecting ring and connecting sleeve is slidably connected. Compared with the prior art, the utility model discloses a strutting open subassembly with a plurality of connecting rod synchronous drive structures, which is matched with a precise adjusting assembly arranged on the connecting post, to realize synchronous radial expansion of a plurality of arc surface blocks, apply uniform circumferential force to the upper guiding hole and the lower fastening hole of the rubber bushing at the same time, and effectively solve the problem of rubber bushing tearing caused by stress concentration of traditional tools.

Description

Technical Field

[0001] This utility model relates to the field of automotive repair tools, specifically a special support and positioning device for replacing the rubber bushing of the upper seat of an automotive chassis shock absorber. Background Technology

[0002] The upper bushing of a car chassis shock absorber is an elastic bushing that connects the shock absorber to the vehicle body. Its core functions are to buffer vibrations, reduce noise, and allow the shock absorber to adjust its camber within a certain range. Because it is subjected to severe impacts and torque over a long period, the rubber is prone to aging, cracking, and loss of elasticity. This can lead to abnormal noises when the vehicle goes over bumps, an increased feeling of looseness in the chassis, and even affect wheel alignment parameters and handling stability. Therefore, regular inspection and timely replacement are necessary to restore the integrity of the chassis and improve ride quality.

[0003] Existing technologies lack dedicated standardized tools, and personnel often use general-purpose pullers as a substitute for removing the upper bushings of shock absorbers. The axial tensile force generated during pulling is used to forcibly remove the aged and shrinking bushings from the core rod. However, existing general-purpose pullers have the following drawbacks during operation:

[0004] The existing technical solutions have the following drawbacks in operation:

[0005] (1) The general-purpose puller is difficult to form a stable force point inside the rubber sleeve. It can only provide unidirectional local tension and cannot generate a uniform radial expansion force on the lower fastening hole of the shrinking rubber sleeve, which makes it easy to slip or even damage the rubber sleeve during operation.

[0006] (2) Traditional tools lack precise force control and holding mechanisms, and cannot maintain a stable spread state during operation. Operators need to continuously apply external force, and it is difficult to meet the different spread force requirements of different specifications of rubber sleeves, which seriously affects the efficiency and reliability of operation. Utility Model Content

[0007] This utility model aims to provide a special expansion and positioning device for replacing the upper seat rubber sleeve of an automotive chassis shock absorber. It is mainly used to solve the technical problem that it is difficult to find a suitable force point inside the rubber sleeve in the existing technology, and the force is concentrated in a single position, which cannot solve the problem of shrinkage and tightness of the fastening hole at the bottom of the rubber sleeve.

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0009] A special support and positioning device for replacing the upper seat rubber sleeve of an automotive chassis shock absorber includes a connecting sleeve, a connecting post inside the connecting sleeve, the connecting post being fixedly connected to the bottom end of the connecting sleeve, a support component for supporting the upper seat rubber sleeve on the connecting sleeve, and an adjustment component for adjusting the support component on the connecting post.

[0010] The working principle and beneficial effects of this utility model:

[0011] 1. Working principle: During operation, the device is first placed on the shock absorber core rod for positioning. The rotation adjustment component drives the expansion component to expand the multiple arc blocks radially and evenly, opening the inner hole of the rubber sleeve and effectively separating the contact surface with the core rod. After the expansion is completed, the rubber sleeve can be removed as a whole by simply pulling the top handle and using frictional resistance, achieving non-destructive disassembly and assembly.

[0012] 2. Beneficial effects:

[0013] (1) There is no dedicated spreading and positioning tool in the existing technology. Personnel usually use a general puller to operate, but it is difficult to find a suitable force point inside the rubber sleeve, and the force is concentrated in a single position, which cannot solve the problem of shrinkage and tightness of the lower fastening hole of the rubber sleeve. This solution sets up a spreading component with a multi-link synchronous drive structure, and with the precision adjustment component set on the connecting column, it realizes the synchronous radial expansion of multiple arc blocks, which can simultaneously apply a uniform circumferential force to the upper guide hole and the lower fastening hole of the rubber sleeve, effectively solving the problem of rubber sleeve tearing caused by the force concentration of traditional tools.

[0014] (2) This solution achieves precise control and stable maintenance of the spreading force by setting a precision adjustment mechanism consisting of an external threaded column and an internal threaded ring at the top of the connecting column, and cooperating with the convex and concave guide structure of the sliding block and the annular groove, thus solving the problem that general tools cannot perform fine adjustment.

[0015] Preferably, the spreading assembly includes two first connecting rings arranged longitudinally. The first connecting rings are sleeved on the periphery of the connecting sleeve and are slidably connected to the periphery of the connecting sleeve. Each of the two first connecting rings is fixedly connected with several first connecting ears. The first connecting ears are in pairs, and the same first connecting rod is rotatably connected to the two first connecting ears in the same group via a rotating shaft. Two connecting plates are provided at the end of the first connecting rod away from the first connecting ears. The two first connecting rods on the same side are rotatably connected to the corresponding two connecting plates via a rotating shaft. The same arc surface block is fixedly connected to the side of the corresponding two connecting plates away from the first connecting rod. The several arc surface blocks are arranged in a ring array. The function of the spreading assembly is to convert the axial movement of the connecting ring into the synchronous radial expansion movement of multiple arc surface blocks through a multi-link mechanism composed of the first connecting rings, first connecting rods, and connecting plates. Its core function is to provide a circumferential spreading force that is evenly distributed from the center outward to ensure that the upper rubber sleeve is spread out smoothly and symmetrically, avoiding deformation or damage caused by single-point force.

[0016] Preferably, the adjusting assembly includes a second connecting ring located above the connecting sleeve. The second connecting ring is sleeved around the periphery of the connecting post and is slidably connected to the periphery of the connecting post. A plurality of second connecting ears are fixedly connected to the periphery of the second connecting ring. The second connecting ears are arranged in pairs, and two second connecting ears in the same pair are rotatably connected to the same second connecting rod via a rotating shaft. The end of the second connecting rod away from the second connecting ear is rotatably connected to two corresponding connecting plates via a rotating shaft. An externally threaded post is fixedly connected to the top of the connecting post, and an internally threaded ring is threaded onto the externally threaded post. The bottom end of the internal threaded ring is fixedly connected to several connecting rods, which are arranged in a circular array. The bottom end of each connecting rod is fixedly connected to a sliding block. The top end of the second connecting ring has an annular groove, and the sliding block is located in the annular groove. The sliding block is slidably connected to the inner wall of the annular groove. The core function of the adjusting component is to achieve precise, stable, and continuously adjustable control of the diameter of the expanding component. It converts the rotational motion into a precise linear displacement of the second connecting ring through the external threaded column and the internal threaded ring. The second connecting ring then transmits this linear displacement to the expanding component through the second linkage mechanism, thereby controlling the expansion or contraction amplitude.

[0017] Preferably, the sliding block is convex, and the annular groove is concave to match the sliding block. The matching design of the convex sliding block and the concave annular groove forms a highly stable sliding pair. It ensures that when the second connecting ring is subjected to radial force from the linkage mechanism, it can only move in a strictly linear manner along the axis of the connecting column without any rotation or offset, thereby ensuring the smoothness, accuracy and structural rigidity of the adjustment process.

[0018] Preferably, a handle is fixedly connected to the top of the external threaded column. The core function of the handle fixed to the top of the external threaded column is to serve as a sturdy lifting force point. After the opening operation is completed, it provides the operator with a force fulcrum for axial movement of the entire tool together with the tightened rubber sleeve.

[0019] Preferably, each of the curved blocks is fixedly connected to an anti-slip pad on the side away from the connecting plate. The anti-slip pad is made of rubber. The rubber anti-slip pad on the outer side of the curved block has a dual function. Its main function is to significantly increase the static friction between the curved block and the inner wall of the rubber sleeve, ensuring that the tool and the sleeve will not slide relative to each other during the lifting operation. Its additional function is to act as a soft buffer interface to prevent the metal curved block from directly contacting and scratching the inner surface of the sleeve, thereby protecting the workpiece. Attached Figure Description

[0020] Figure 1 This utility model patent describes a three-dimensional structure for replacing the rubber bushing of the upper seat of the car chassis shock absorber with a special support and positioning device. Figure 1 ;

[0021] Figure 2 This utility model patent describes a three-dimensional structure for replacing the rubber bushing of the upper seat of the car chassis shock absorber with a special support and positioning device. Figure 2 ;

[0022] Figure 3 This utility model patent shows the structural diagram of the first connecting ring area of ​​the special support locator for replacing the upper seat rubber sleeve of the automobile chassis shock absorber.

[0023] Figure 4 This is a cross-sectional view of the second connecting ring of the special support locator for replacing the upper seat rubber sleeve of the automobile chassis shock absorber, which is part of this utility model patent.

[0024] The reference numerals in the accompanying drawings of the instruction manual include: 1. connecting sleeve; 2. connecting post; 3. first connecting ring; 4. first connecting lug; 5. first connecting rod; 6. connecting plate; 7. arc-shaped block; 8. second connecting ring; 9. second connecting lug; 10. second connecting rod; 11. internal threaded ring; 12. external threaded post; 13. connecting rod; 14. sliding block; 15. annular groove; 16. handle; 17. anti-slip pad. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figure 1 - Figure 4 As shown, the special expansion and positioning device for replacing the upper seat rubber bushing of the automobile chassis shock absorber includes a connecting sleeve 1, a connecting column 2 inside the connecting sleeve 1, and a fixed connection between the connecting column 2 and the bottom end of the connecting sleeve 1. The connecting sleeve 1 is equipped with an expansion component for expanding the upper seat rubber bushing, and the connecting column 2 is equipped with an adjustment component for adjusting the expansion component. The fixed connection between the connecting sleeve 1 and the connecting column 2 constitutes the reference coordinate system of the device. Its principle is that a stable central axis is established through rigid connection, providing a precise spatial reference for all moving parts. The beneficial effect of this structure is that it ensures that all movements of the expansion component and the adjustment component are around the same geometric center, eliminating eccentricity errors during the movement process and providing a reliable geometric basis for accurately controlling the bushing expansion process.

[0027] More specifically, the spreading assembly includes two first connecting rings 3, which are arranged longitudinally. The first connecting rings 3 are sleeved on the periphery of the connecting sleeve 1 and are slidably connected to the periphery of the connecting sleeve 1. Each of the two first connecting rings 3 has several first connecting ears 4 fixedly connected to it. The first connecting ears 4 are in pairs, and the same first connecting rod 5 is rotatably connected to the two first connecting ears 4 in the same pair via a rotating shaft. The end of the first connecting rod 5 away from the first connecting ear 4 is provided with two connecting plates 6. The two first connecting rods 5 on the same side are connected to the two corresponding connecting plates 6. The two connecting plates 6, located away from the first connecting rod 5, are fixedly connected to the same arc-shaped block 7 via a rotating shaft. Several arc-shaped blocks 7 are arranged in a ring array. The expansion assembly adopts a multi-link cooperative working mechanism. The principle is that the relative movement of the two first connecting rings 3 is converted into the radial movement of the arc-shaped block 7 through the transmission system composed of the first connecting rod 5 and the connecting plate 6. The beneficial effect of this design is that it realizes the synchronous symmetrical movement of multiple expansion points, ensures that the inner wall of the rubber sleeve is subjected to uniform circumferential force, avoids local stress concentration, and makes the expansion diameter continuously adjustable.

[0028] More specifically, the adjusting assembly includes a second connecting ring 8, located above the connecting sleeve 1. The second connecting ring 8 is sleeved around the periphery of the connecting post 2 and is slidably connected to the periphery of the connecting post 2. Several second connecting ears 9 are fixedly connected to the periphery of the second connecting ring 8. The second connecting ears 9 are in pairs, and the same second connecting rod 10 is rotatably connected to two second connecting ears 9 in the same group via a rotating shaft. The end of the second connecting rod 10 away from the second connecting ear 9 is rotatably connected to two corresponding connecting plates 6 via a rotating shaft. An external threaded post 12 is fixedly connected to the top of the connecting post 2. An internal threaded ring 11 is threadedly connected to the external threaded post 12. Several connecting rods 13 are fixedly connected to the bottom of the internal threaded ring 11. The several connecting rods 13 are arranged in a circular array. A sliding block 14 is fixedly connected to the bottom of the connecting rod 13. An annular groove 15 is opened at the top of the second connecting ring 8. The sliding block 14 is located inside the annular groove 15 and is slidably connected to the inner wall of the annular groove 15. The adjusting component utilizes the combined motion principle of screw drive and spatial linkage. The second connecting ring 8 is connected to the spreading component through the second connecting rod 10. When the second connecting ring 8 generates axial displacement, the spreading diameter is adjusted by changing the spatial geometric relationship of the linkage system. The beneficial effect of this design is that it provides a precise displacement amplification function, allowing the operator to achieve a large range of diameter changes through small stroke adjustments, greatly enhancing the applicability of the equipment. The external threaded column 12 and the internal threaded ring 11 constitute a precise motion conversion mechanism. Its principle is to utilize the mechanical characteristics of the screw pair to convert rotational motion into precise linear displacement. The beneficial effect of this design is that it provides sufficient mechanical gain to make operation easier and has a self-locking function to maintain stability in any position, ensuring safety and reliability during operation.

[0029] More specifically, the sliding block 14 is convex, and the annular groove 15 is concave to match the sliding block 14. The sliding block 14 and the annular groove 15 adopt the geometric constraint guidance principle. The movement of the convex sliding block 14 in the concave annular groove 15 is subject to multi-directional constraints, retaining only the required axial movement degree of freedom. The beneficial effect of this design is that it provides full-circumferential torque support capability, which can effectively resist the lateral forces generated during operation and ensure that the second connecting ring 8 always maintains the correct movement trajectory.

[0030] More specifically, the top of the external threaded column 12 is fixedly connected to a handle 16. The handle 16 is designed as an integrated force-bearing unit based on the principle of force flow transmission optimization. Its beneficial effect is to simplify the complex multi-directional force state into a single axial lifting force. Through this carefully designed force transmission path, it is ensured that all the spreading units can transmit the force synchronously and evenly during the lifting operation, thereby improving the operating efficiency and safety of use.

[0031] More specifically, anti-slip pads 17 are fixedly connected to the side of the arc block 7 away from the connecting plate 6. The anti-slip pads 17 are made of rubber. The use of rubber in the anti-slip pads 17 is based on its special surface physical properties. Its beneficial effect is that through the material's own high coefficient of friction and elastic deformation ability, it not only provides reliable operating adhesion, but also achieves flexible protection of the workpiece surface, effectively avoiding damage to the inner wall of the rubber sleeve during operation.

[0032] As can be seen from the above, the specific embodiments of this utility model are as follows:

[0033] When it is necessary to replace the aged and shrunken upper bushing of the shock absorber, the operator first places the connecting sleeve 1 on the top of the shock absorber core rod, so that the bottom end of the connecting post 2 abuts against the top of the core rod. At this time, the shrunken arc-shaped blocks 7 are all located in the upper guide hole of the bushing. By rotating the internal threaded ring 11, the connecting rod 13 is driven to move the sliding block 14 downward in the annular groove 15, thereby pushing the second connecting ring 8 downward along the connecting post 2. The second connecting ring 8 pushes the connecting plate 6 through the second connecting rod 10, which in turn causes the first connecting rod 5 to move downward. The two first connecting rings 3 move relative to each other, eventually causing the arc-shaped blocks 7 of the annular array to expand radially in sync, gradually opening the upper guide hole of the rubber sleeve. As the internal thread ring 11 continues to rotate, the expansion force of the arc-shaped blocks 7 is transmitted to the lower fastening hole through the rubber sleeve, causing it to gradually separate from the state of being in contact with the core rod. When the rubber sleeve is fully opened, the operator pulls the handle 16 upwards, and the force is transmitted to the opened arc-shaped blocks 7 through the connecting column 2. Using the friction between the anti-slip pad 17 and the inner wall of the rubber sleeve, the rubber sleeve can be completely removed from the core rod.

[0034] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A special support and positioning device for replacing the upper rubber bushing of a car chassis shock absorber, including a connecting sleeve (1), characterized in that: A connecting post (2) is provided inside the connecting sleeve (1). The connecting post (2) is fixedly connected to the bottom end of the connecting sleeve (1). A spreading component for spreading the upper seat rubber sleeve is provided on the connecting sleeve (1). An adjusting component for adjusting the spreading component is provided on the connecting post (2). The spreading component includes two first connecting rings (3), which are arranged longitudinally. The first connecting rings (3) are sleeved on the periphery of the connecting sleeve (1). The first connecting rings (3) are slidably connected to the periphery of the connecting sleeve (1). Several first connecting ears (4) are fixedly connected to each of the two first connecting rings (3). The first connecting ears (4) are in pairs. The same first connecting rod (5) is rotatably connected to the two first connecting ears (4) in the same group through a rotating shaft. Two connecting plates (6) are provided at the end of the first connecting rod (5) away from the first connecting ear (4). The two first connecting rods (5) on the same side are rotatably connected to the corresponding two connecting plates (6) through a rotating shaft. The same arc surface block (7) is fixedly connected to the side of the corresponding two connecting plates (6) away from the first connecting rod (5). Several arc surface blocks (7) are arranged in a ring array. The adjusting assembly includes a second connecting ring (8), which is located above the connecting sleeve (1). The second connecting ring (8) is sleeved on the periphery of the connecting post (2) and is slidably connected to the periphery of the connecting post (2). Several second connecting ears (9) are fixedly connected to the periphery of the second connecting ring (8). The second connecting ears (9) are in pairs, and the same second connecting rod (10) is rotatably connected to the two second connecting ears (9) in the same pair via a rotating shaft. The end of the second connecting rod (10) away from the second connecting ear (9) is connected to the corresponding two connecting ears (9) via a rotating shaft. A connecting plate (6) is rotatably connected. An external threaded column (12) is fixedly connected to the top of the connecting column (2). An internal threaded ring (11) is threadedly connected to the external threaded column (12). A number of connecting rods (13) are fixedly connected to the bottom of the internal threaded ring (11). The number of connecting rods (13) are arranged in a ring array. A sliding block (14) is fixedly connected to the bottom of the connecting rod (13). An annular groove (15) is opened at the top of the second connecting ring (8). The sliding block (14) is located in the annular groove (15). The sliding block (14) is slidably connected to the inner wall of the annular groove (15).

2. The special support and positioning device for replacing the upper rubber sleeve of the automobile chassis shock absorber according to claim 1, characterized in that: The sliding block (14) is convex, and the annular groove (15) is concave to match the sliding block (14).

3. The special support and positioning device for replacing the upper rubber sleeve of the automobile chassis shock absorber according to claim 1, characterized in that: The top of the external threaded post (12) is fixedly connected to a handle (16).

4. The special support and positioning device for replacing the upper rubber sleeve of the automobile chassis shock absorber according to claim 1, characterized in that: Each of the arc-shaped blocks (7) is fixedly connected to an anti-slip pad (17) on the side away from the connecting plate (6), and the anti-slip pad (17) is made of rubber.

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