A fixing device for a press-in barrel shock absorber bushing

Abstract

The utility model relates to a kind of fixing device for crimping barrel type shock absorber shaft sleeve, belong to mechanical assembly tooling technical field, including device box, crimping module, guiding crimping mechanism, crimping module includes lower positioning mould, upper punch, mould rotating adjusting assembly, lower positioning mould is loaded with the barrel type shock absorber to be crimped, barrel type shock absorber is configured with shaft sleeve, upper punch is located in the upper of lower positioning mould, for applying crimping force to shaft sleeve, lower positioning mould and upper punch are provided with multiple groups for a variety of models of barrel type shock absorber, and one-to-one correspondence, multiple groups of lower positioning mould are loaded in mould rotating adjusting assembly for rotatable replacement type structure, to adapt to different models of barrel type shock absorber.The utility model, by integrated efficient mould switching, reliable guiding mechanism and quick replacement design, significantly improve the efficiency, quality and safety of barrel type shock absorber shaft sleeve crimping, while enhancing the flexible manufacturing capability and maintenance convenience of equipment, applicable to high-precision production requirements.

Description

Technical Field

[0001] This utility model relates to the field of mechanical assembly tooling technology, and in particular to a fixing device for pressing cylindrical shock absorber bushings. Background Technology

[0002] The telescopic shock absorber is a key component of the vehicle suspension system. The quality of the compression of its bushing directly affects the performance, service life and driving safety of the shock absorber. During vehicle operation, the shock absorber and its bushing must withstand continuous impact and vibration. Therefore, the connection between the bushing and the shock absorber must be firm and reliable.

[0003] A search revealed several existing technologies for fixing, pressing, or installing shock absorber components. For example, a clamping device with publication number CN202222309672.3 aims to solve the problems of easy splitting at the weld between the shock absorber and the metal tube, and loosening of the metal tube. This device uses a clamping module (including fasteners and washers) to fix the metal tube and the mounting bracket. However, such clamping or fixing methods often lack efficient mold switching mechanisms and reliable pressing guides when pressing bushings of different models of cylindrical shock absorbers. This may lead to inconvenient adjustment, low pressing efficiency, and if the pressing force direction is not well controlled, it may cause the bushing to be pressed in incorrectly or damage the workpiece.

[0004] In addition, some existing shock absorber fixing or mounting structures, such as the compact elastic fixed support described in CN103648821A, which features an elastic fixed bearing, although they take elastic support into account, often lack the ability to quickly adapt to various specifications of workpieces in high-precision and high-efficiency bushing press-fit production scenarios, making it difficult to meet the requirements of modern production lines for flexible manufacturing and precision operation.

[0005] In addition, some traditional crimping equipment has a cumbersome mold replacement process, requiring manual adjustment of positioning multiple times. Furthermore, the crimping process lacks effective guidance and protection, which not only affects production efficiency but also poses certain safety hazards.

[0006] Therefore, in existing technologies, mold switching often involves manual disassembly, handling, and reinstallation, a process that takes several minutes. Furthermore, reinstallation requires tedious calibration and positioning, making it difficult to guarantee the coaxiality of the mold center, directly impacting the pressing quality. In addition, while some automated equipment uses linear slides for mold changing, it occupies a large area, has limited mold storage capacity, and its positioning accuracy is affected by the repeatability of the linear guide rails, making it difficult to meet the demands of high-efficiency, high-precision production cycles. Therefore, a fixing device for pressing cylindrical shock absorber bushings is proposed.

[0007] The information disclosed in this background section is intended only to enhance the understanding of the general background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0008] This utility model provides a fixing device for pressing cylindrical shock absorber bushings, which solves the problems of low mold switching efficiency, unreliable pressing guidance, and cumbersome mold replacement process in existing cylindrical shock absorber bushing pressing equipment. By integrating efficient mold switching, reliable guiding mechanism and quick replacement design, it significantly improves the efficiency, quality and safety of cylindrical shock absorber bushing pressing, while enhancing the equipment's flexible manufacturing capability and maintenance convenience, making it suitable for high-precision production requirements.

[0009] The present invention provides the following solution to the above-mentioned technical problems: a fixing device for pressing a cylindrical shock absorber bushing, comprising a device housing, a pressing module, and a guiding pressing mechanism. The pressing module comprises a lower positioning mold, an upper pressing head, and a mold rotation adjustment assembly. The lower positioning mold is loaded with the cylindrical shock absorber to be pressed, and the cylindrical shock absorber is equipped with a bushing. The upper pressing head is located directly above the lower positioning mold and is used to apply a pressing force to the bushing.

[0010] The lower positioning mold and upper pressure head are provided in multiple sets for various models of cylindrical shock absorbers, and they correspond one-to-one. The multiple sets of lower positioning molds are mounted on the mold rotation adjustment component and are rotatable and replaceable to adapt to different models of cylindrical shock absorbers. The upper pressure head is a replaceable structure that matches the lower positioning mold.

[0011] The guiding pressing mechanism includes a hydraulic cylinder, a guide column, and a fixed plate. The hydraulic cylinder and the guide column are both installed in the device housing. The fixed plate is installed on the drive end of the hydraulic cylinder. The upper pressing head is detachably installed on the fixed plate. The fixed plate is provided with a guide sleeve to constrain the fixed plate to move along the vertical direction of the guide column.

[0012] Based on the above technical solution, the present invention can be further improved as follows.

[0013] Furthermore, the device housing is equipped with a door, which has an observation window, allowing the operator to observe the pressing process in real time when the door is closed, and facilitating the operator to replace, maintain or clean the mold.

[0014] Furthermore, the fixing plate is provided with a slot corresponding to the upper pressure head, and the upper pressure head is provided with a locking block corresponding to the slot. The locking block and the fixing plate are equipped with magnetic pins, and magnetic blocks are provided in the slots corresponding to the magnetic pins, realizing the rapid positioning and installation of the upper pressure head. The function of the magnetic pins and magnetic blocks is to provide additional fixing force to ensure that the upper pressure head remains stably connected during the crimping process, simplifying the replacement process of the upper pressure head, improving production efficiency and flexibility. The magnetic fixing method is easy to operate, requires no complicated tools, reduces installation time, and at the same time ensures crimping accuracy and reliability, avoiding errors caused by loosening.

[0015] Furthermore, the device housing is provided with a loading tray, and the loading tray is provided with a placement groove corresponding to the upper pressure head for storing and organizing multiple upper pressure heads. This reduces the time spent searching for and replacing upper pressure heads, avoids tool damage or confusion, extends the service life of the upper pressure heads, and helps maintain a clean and safe working environment.

[0016] Furthermore, the mold rotation adjustment assembly includes a mold adjustment plate, a brake servo motor, a first bearing base, and a second bearing base. The mold adjustment plate is rotatably connected to the device housing via the first and second bearing bases. The brake servo motor drives the mold adjustment plate to rotate within the device housing. The function of the mold adjustment plate is to carry multiple lower positioning molds and achieve rapid replacement through rotation. The function of the brake servo motor is to provide precise drive and positioning control. The function of the bearing base is to support the mold adjustment plate to ensure smooth rotation, realizing efficient switching of multiple mold models, adapting to the needs of small-batch, multi-variety production. The brake servo motor ensures the accuracy of the rotation position, improves the consistency of pressing, and reduces manual adjustment time and labor intensity.

[0017] Furthermore, the device housing includes a lower housing and a protective cover, with a support frame installed inside the lower housing. The first bearing base is installed in the device housing, and the second bearing base is installed on the support frame. The lower housing has a rotating cavity corresponding to the mold adjustment plate, and the rotating cavity has a processing position corresponding to the guide pressing mechanism. The brake servo motor is mounted on the support frame. The function of the rotating cavity and the processing position is to provide rotation space for the mold adjustment plate and ensure accurate pressing position, thereby improving the stability and durability of the device, reducing the impact of vibration and deformation on pressing accuracy, and effectively isolating external interference, thus improving operational safety. At the same time, the modular design facilitates manufacturing, assembly, and maintenance.

[0018] Furthermore, the mold adjustment plate has evenly spaced mounting holes corresponding to the lower positioning mold, and is installed in the mounting holes by screws, providing a flexible and reliable mold installation method. The lower positioning mold can be easily disassembled and replaced. The evenly distributed mounting holes help balance the load, reduce the risk of off-center load, improve the stability and consistency of the pressing process, and simplify mold management.

[0019] Furthermore, the upper surface of the lower positioning mold is provided with a cavity that matches the outer contour of the cylindrical shock absorber. The bottom center of the cavity is provided with a clearance hole for the shock absorber piston rod to pass through. The lower pressing end face of the upper pressure head is provided with an annular pressing surface that matches the outer diameter of the bushing. The function of the clearance hole is to avoid interference with the piston rod of the shock absorber, and the function of the annular pressing surface is to ensure that the pressing force is applied evenly to the bushing, thereby improving the pressing quality and accuracy. The design of the cavity and the pressing surface optimizes the force distribution, reduces the risk of deformation or damage to the parts, and ensures the firmness and consistency of the bushing pressing, making it suitable for high-precision production requirements.

[0020] This utility model provides a fixing device for the bushing of a press-fit cylindrical shock absorber, which has the following advantages:

[0021] 1. It can achieve efficient mold switching and rapid adaptation. Through the mold rotation adjustment components (including mold adjustment plate, brake servo motor, etc.), multiple sets of lower positioning molds can be rotated and replaced, adapting to different models of cylindrical shock absorbers, which greatly improves mold switching efficiency and production flexibility, and meets the needs of small batch and multi-variety production.

[0022] 2. It has reliable crimping guidance and accuracy assurance. The guiding crimping mechanism adopts the design of guide column and guide sleeve to constrain the fixed plate to move in the vertical direction, ensuring the accuracy of the crimping force direction, preventing the bushing from being pressed in incorrectly or the workpiece from being damaged, thus improving the crimping quality and consistency.

[0023] 3. It enables quick replacement and easy operation. The upper pressure head achieves quick positioning and installation through the design of slots, blocks and magnetic pins, which simplifies the replacement process, reduces installation time and tool dependence, and the magnetic fixation provides additional stability to avoid loosening errors.

[0024] 4. Enhanced safety and visualization management: The device enclosure is equipped with a door with an observation window, allowing operators to observe the pressing process in real time while it is closed, improving operational safety and facilitating mold replacement, maintenance, and cleaning. The loading tray is equipped with placement grooves for storing and organizing multiple upper pressing heads, reducing search and replacement time, preventing tool damage or confusion, extending the service life of the upper pressing heads, and keeping the working environment clean.

[0025] 5. Precise control is achieved: The brake servo motor provides precise drive and positioning control, ensuring accurate rotation of the mold adjustment plate, improving pressing consistency, reducing manual adjustment time and labor intensity. The device housing adopts a bottom housing and protective cover design, combined with support frame and bearing base, to ensure smooth rotation of the mold adjustment plate, reducing the impact of vibration and deformation on pressing accuracy. The modular design facilitates manufacturing, assembly and maintenance.

[0026] 6. It has excellent crimping quality and optimized crimping force distribution. The cavity and clearance hole design of the lower positioning mold are adapted to the outer contour of the shock absorber and the piston rod. The annular crimping surface of the upper pressure head ensures that the crimping force is applied evenly, optimizes the force distribution, reduces the risk of part deformation or damage, and ensures the firmness and consistency of the bushing crimping.

[0027] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it according to the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. The specific implementation methods of this utility model are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0028] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0029] Figure 1 A schematic diagram of a fixing device for a press-fit cylindrical shock absorber bushing provided in an embodiment of this utility model;

[0030] Figure 2 A front view of a fixing device for a press-fit cylindrical shock absorber bushing provided in an embodiment of the present invention;

[0031] Figure 3 A schematic diagram of the mold adjusting plate in a fixing device for a press-fit cylindrical shock absorber bushing, provided in an embodiment of this utility model;

[0032] Figure 4 This is a schematic diagram of the upper pressure head in a fixing device for pressing a sleeve of a cylindrical shock absorber, provided as an embodiment of the present invention.

[0033] The attached diagram lists the components represented by each number as follows:

[0034] 1. Device housing; 101. Lower housing; 102. Protective cover; 103. Support frame; 2. Lower positioning mold; 3. Upper pressure head; 4. Guide column; 5. Guide sleeve; 6. Fixing plate; 7. Cylindrical shock absorber; 8. Bushing; 9. Housing door; 10. Mold rotation adjustment assembly; 1001. Mold adjustment plate; 1002. Brake servo motor; 1003. Bearing base No. 1; 1004. Bearing base No. 2; 11. Hydraulic cylinder; 12. Clamping block; 13. Magnetic pin; 14. Loading pallet. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-4The principles and features of this utility model are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description and claims. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0036] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] like Figure 1-4 As shown, a fixing device for pressing the bushing of a cylindrical shock absorber includes a device housing 1, a pressing module and a guide pressing mechanism. The device housing 1 consists of a lower housing 101 and a protective cover 102. The lower housing 101 is provided with a support frame 103 to enhance structural stability. The protective cover 102 effectively isolates external interference and improves operational safety.

[0039] The pressing module includes a lower positioning mold 2, an upper pressing head 3, and a mold rotation adjustment assembly 10. The lower positioning mold 2 is evenly installed on the mounting holes of the mold adjustment plate 1001 by screws. The mold adjustment plate 1001 is rotatably connected to the device housing 1 through a first bearing base 1003 and a second bearing base 1004. The brake servo motor 1002 is installed on the support frame 103 and drives the mold adjustment plate 1001 to rotate, realizing the rapid switching of multiple sets of lower positioning molds 2 to adapt to different models of cylindrical shock absorbers 7. The upper pressing head 3 is a replaceable structure that matches the lower positioning mold 2. It is positioned by the slots and blocks 12 on the fixing plate 6 and fixed by magnetic pins 13 and magnetic blocks to ensure convenient installation and stable connection. The device housing 1 is also provided with a loading tray 14, which has a mounting groove for storing and organizing multiple upper pressing heads 3, reducing replacement time and avoiding tool confusion.

[0040] The brake servo motor 1002 is connected to the central shaft of the mold adjustment plate 1001 through a reducer. Multiple positioning holes or sensing plates corresponding to the lower positioning mold 2 station are provided on the edge or below the mold adjustment plate 1001. A proximity switch or photoelectric sensor is installed at a fixed position in the device housing 1. When the mold adjustment plate 1001 rotates, the controller performs coarse positioning through the encoder of the servo motor. When the sensing plate triggers the proximity switch, a signal is sent for precise positioning. Then the servo motor starts the brake function to firmly lock the mold adjustment plate 1001 in the current station, ensuring that there is no displacement during the pressing process.

[0041] The guiding pressing mechanism includes a hydraulic cylinder 11, a guide column 4, and a fixed plate 6. The hydraulic cylinder 11 and the guide column 4 are installed in the device housing 1. The fixed plate 6 is installed at the drive end of the hydraulic cylinder 11 and is provided with a guide sleeve 5 so that the fixed plate 6 moves vertically along the guide column 4 to ensure accurate pressing force direction. The upper pressing head 3 is detachably installed on the fixed plate 6 and applies pressure to the bushing 8 during the pressing process.

[0042] The upper surface of the lower positioning mold 2 is provided with a cavity that matches the outer contour of the cylindrical shock absorber 7. A clearance hole is provided at the center of the bottom of the cavity to avoid interference with the piston rod of the shock absorber. The lower pressing end face of the upper pressing head 3 is provided with an annular pressing surface that matches the outer diameter of the bushing 8 to ensure uniform distribution of pressing force and improve pressing quality.

[0043] The specific working principle and usage method of this utility model are as follows:

[0044] 1. Preparation and confirmation stage: The operator opens the door 9 of the device box 1 and can observe the internal situation through the observation window. According to the production plan, the operator confirms the model of the cylindrical shock absorber 7 to be pressed, takes the upper pressure head 3 matching the model from the loading pallet 14, and quickly installs it onto the fixing plate 6 through the card block 12 and magnetic pin 13.

[0045] 2. Mold switching and workpiece clamping stage: The control system (such as PLC) commands the brake servo motor 1002 to start, driving the mold adjustment plate 1001 to rotate, accurately rotating the work position carrying the corresponding model lower positioning mold 2 to the pressing processing position (i.e. directly below the upper pressing head 3), and the brake servo motor 1002 locks and positions it.

[0046] The operator places the cylindrical shock absorber 7 to be pressed into the cavity of the lower positioning mold 2 at the current work station, ensuring that the piston rod of the shock absorber has passed through the clearance hole at the bottom of the cavity, and initially places the bushing 8 on the corresponding mounting hole of the shock absorber housing.

[0047] 3. Execution of the crimping stage: The operator closes the box door 9, the hydraulic cylinder 11 is connected to the hydraulic pump station, and the crimping program is started on the control panel of the hydraulic pump station. After receiving the signal, the piston rod of the hydraulic cylinder 11 extends, driving the fixed plate 6 to move smoothly down along the guide column 4, and the upper pressure head 3 fixed on it moves downward accordingly.

[0048] The annular pressing surface of the upper pressing head 3 contacts the bushing 8, and under the continuous drive of the hydraulic cylinder, the bushing 8 is pressed vertically and evenly into the housing mounting hole of the cylindrical shock absorber 7. The operator can monitor the entire pressing process in real time through the observation window.

[0049] 4. Completion and Reset Stage: When the crimping reaches the preset depth or pressure, the piston rod of the hydraulic cylinder 11 retracts, driving the upper pressure head 3 back to the initial position. The operator opens the box door 9 and takes out the completed shock absorber assembly.

[0050] After conducting a preliminary quality inspection, the next work cycle can begin. If it is necessary to switch product models, simply repeat the above steps of changing the mold and upper pressure head.

[0051] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A fixing device for pressing and sealing bushings of cylindrical shock absorbers, comprising a device housing (1), a pressing module, and a guiding pressing mechanism, characterized in that, The pressing module includes a lower positioning mold (2), an upper pressing head (3), and a mold rotation adjustment assembly (10). The lower positioning mold (2) is equipped with a cylindrical shock absorber (7) to be pressed. The cylindrical shock absorber (7) is equipped with a bushing (8). The upper pressing head (3) is located directly above the lower positioning mold (2) and is used to apply pressing force to the bushing (8). The lower positioning mold (2) and upper pressure head (3) are provided in multiple sets for various models of cylindrical shock absorbers (7), and they correspond one to one. The multiple sets of lower positioning molds (2) are mounted on the mold rotation adjustment assembly (10) and are rotatable and replaceable to adapt to different models of cylindrical shock absorbers (7). The upper pressure head (3) is a replaceable structure that matches the lower positioning mold (2). The guiding pressing mechanism includes a hydraulic cylinder (11), a guide column (4), and a fixing plate (6). The hydraulic cylinder (11) and the guide column (4) are both installed in the device housing (1). The fixing plate (6) is installed on the driving end of the hydraulic cylinder (11). The upper pressing head (3) is detachably installed on the fixing plate (6). The fixing plate (6) is provided with a guide sleeve (5) to constrain the fixing plate (6) to move in the vertical direction of the guide column (4).

2. The fixing device for the bushing of a press-fit cylindrical shock absorber according to claim 1, characterized in that, The device housing (1) is provided with a door (9), and the door (9) is provided with an observation window.

3. The fixing device for the bushing of a press-fit cylindrical shock absorber according to claim 1, characterized in that, The fixing plate (6) is provided with a slot corresponding to the upper pressure head (3), and the upper pressure head (3) is provided with a block (12) corresponding to the slot. The block (12) and the fixing plate (6) are provided with magnetic pins (13), and a magnetic block is provided in the slot corresponding to the magnetic pins (13).

4. The fixing device for the bushing of a press-fit cylindrical shock absorber according to claim 1, characterized in that, The device housing (1) is provided with a loading tray (14), and the loading tray (14) is provided with a mounting groove corresponding to the pressure head (3).

5. The fixing device for the bushing of a press-fit cylindrical shock absorber according to claim 1, characterized in that, The mold rotation adjustment assembly (10) includes a mold adjustment plate (1001), a brake servo motor (1002), a first bearing base (1003), and a second bearing base (1004). The mold adjustment plate (1001) is rotatably connected to the device housing (1) through the first bearing base (1003) and the second bearing base (1004). The brake servo motor (1002) drives the mold adjustment plate (1001) to rotate inside the device housing (1).

6. The fixing device for the bushing of a press-fit cylindrical shock absorber according to claim 5, characterized in that, The device housing (1) includes a lower housing (101) and a protective cover (102). A support frame (103) is provided inside the lower housing (101). The first bearing base (1003) is provided in the device housing (1), and the second bearing base (1004) is provided in the support frame (103). The lower housing (101) is provided with a rotating cavity corresponding to the mold adjustment plate (1001). The rotating cavity is provided with a processing position corresponding to the guide pressing mechanism. The brake servo motor (1002) is installed in the support frame (103).

7. The fixing device for a press-fit cylindrical shock absorber bushing according to claim 6, characterized in that, The mold adjustment plate (1001) has uniformly opened mounting holes corresponding to the lower positioning mold (2), and is installed in the mounting holes by screws.

8. The fixing device for the bushing of a press-fit cylindrical shock absorber according to claim 1, characterized in that, The upper surface of the lower positioning mold (2) is provided with a cavity that matches the outer contour of the cylindrical shock absorber (7). The bottom center of the cavity is provided with a clearance hole for the shock absorber piston rod to pass through. The lower pressing end face of the upper pressing head (3) is provided with an annular pressing surface that matches the outer diameter of the bushing (8).

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