An assembly device for an oil seal and guide

Abstract

This utility model relates to an assembly device for oil seals and guides in the field of shock absorber assembly technology. It includes: a body having a frame and a horizontal worktable located inside the frame; a centering clamping assembly located on the horizontal worktable for centering and clamping an outer cylinder; an auxiliary guide cylinder having a lower cylindrical section and an upper conical section, coaxially located at the upper end of the outer cylinder; and a pressing assembly located at the top of the frame for pressing the assembled guide and oil seal into the outer cylinder through the auxiliary guide cylinder; wherein the inner diameter of the lower cylindrical section is not greater than the inner diameter of the outer cylinder. This utility model, through the combined structure of the upper conical section and lower cylindrical section of the auxiliary guide cylinder, presses the pre-assembled guide and oil seal into the outer cylinder in one go, improving assembly efficiency compared to requiring two independent positioning and pressing processes.

Description

Technical Field

[0001] This utility model relates to the field of shock absorber assembly technology, and in particular to an assembly device for an oil seal and guide. Background Technology

[0002] The guide is an important component of the shock absorber, and its main function is to guide the up-and-down movement of the shock absorber's piston rod. For example... Figure 1 An existing guide assembly is shown, including an outer cylinder 100, a guide 200, and an oil seal 300. The oil seal 300 includes a connected metal frame 310 and a rubber body 320. The bottom outer edge of the rubber body 320 has an annular sealing body 321. The upper end of the guide 200 has an annular boss 210. During assembly, the annular sealing body 321 is fitted onto the outside of the annular boss 210, and the annular boss 210 externally supports the annular sealing body 321 and provides an interference fit with the outer cylinder 100, thus achieving a sealing function. The existing installation method for the guide 200 and oil seal 300 is as follows: first, the guide 200 is installed into the outer cylinder 100, and then the oil seal 300 is installed into the outer cylinder 100 and assembled together with the guide 200. This existing assembly method requires two positioning and pressing operations, which affects the assembly efficiency of the shock absorber.

[0003] To improve assembly efficiency, technicians tried other assembly methods: for example, first assembling the guide 200 with the oil seal 300, then the annular seal 321 would be pushed outward by the annular boss 210. At this time, since the outer diameter of the annular seal 321 is larger than the inner diameter of the outer cylinder 100 (see...), Figure 1 (The dotted line part) makes it difficult to install the guide 200 and oil seal 300 into the outer cylinder. During the assembly process, the annular seal 321 may be damaged by the shear force at the end of the outer cylinder 100.

[0004] To address this, we designed an assembly device for oil seals and guides. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model discloses an assembly device for an oil seal and a guide.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An assembly device for an oil seal and guide includes:

[0008] The machine body has a frame and a horizontal worktable located inside the frame;

[0009] A centering clamping assembly is provided on the horizontal worktable for centering and clamping the outer cylinder;

[0010] An auxiliary guide cylinder has a lower cylindrical section and an upper conical section, which are coaxially disposed at the upper end of the outer cylinder;

[0011] The pressing assembly, located at the top of the frame, is used to press the assembly of the guide and the oil seal into the outer cylinder through the auxiliary guide cylinder;

[0012] The inner diameter of the lower cylindrical section is not greater than the inner diameter of the outer cylinder.

[0013] Furthermore, the difference between the inner diameter of the lower cylindrical section and the inner diameter of the outer cylinder is 0.05~0.1mm.

[0014] Furthermore, the auxiliary guide cylinder is installed below the pressing part of the pressing component via an elastic guide assembly to ensure that the auxiliary guide cylinder and the outer cylinder are coaxially aligned.

[0015] Furthermore, the resilient guiding component includes:

[0016] The guide rod is mounted on the pressing part of the pressing assembly at its upper end and has a limiting part at its lower end.

[0017] The guide sleeve is fixedly installed on the outer wall of the auxiliary guide cylinder and slidably sleeved on the guide rod body;

[0018] A spring is sleeved on the guide rod body and located above the guide sleeve;

[0019] The elastic guide assembly has two sets, which are symmetrically arranged on both sides of the auxiliary guide cylinder.

[0020] Furthermore, the centering clamping assembly includes:

[0021] The gearbox is located in the middle of the lower surface of the horizontal worktable, and has at least three output shafts with the same rotation speed along its circumference. Each output shaft is coaxially connected to a transmission screw.

[0022] Each threaded clamp is fitted to the transmission screw in a corresponding manner.

[0023] The drive motor has its output shaft connected to the input shaft of the gearbox.

[0024] The horizontal worktable is provided with a sliding groove above the transmission screw, and the upper end of the threaded clamping block extends out of the sliding groove to clamp the outer cylinder.

[0025] Furthermore, the pressing component includes:

[0026] A telescopic device is installed on the top of the frame, with the telescopic end facing downwards;

[0027] A lower pressure plate is located at the telescopic end of the telescopic device;

[0028] The lower pressure head is located on the lower plate surface of the lower pressure plate and is coaxially positioned above the outer cylinder.

[0029] Furthermore, the two ends of the lower pressure plate are slidably connected to both sides of the frame via linear slide rail pairs.

[0030] Compared with the prior art, the beneficial effects of this utility model are:

[0031] 1. By combining the upper conical section and the lower cylindrical section of the auxiliary guide cylinder, the pre-assembled guide and oil seal are pressed into the outer cylinder in one go. Compared with the two independent positioning and pressing processes required, the assembly efficiency is improved. In addition, the upper conical section provides a progressive shrinkage channel, which allows the annular sealing body of the oil seal to shrink smoothly to the target diameter before being pressed into the outer cylinder, ensuring that the annular sealing body will not be damaged by the shear force at the end of the outer cylinder.

[0032] 2. The elastic guide assembly, through the buffering of the spring and the sliding of the guide sleeve, allows the auxiliary guide cylinder to be positioned on the upper end of the outer cylinder without manual positioning;

[0033] 3. The centering clamping assembly uses a gearbox to drive multiple sets of transmission screws to move synchronously, so that all threaded clamping blocks move radially at equal distances, ensuring that the outer cylinder clamping center automatically coincides with the pressing axis, providing a basic guarantee for assembly. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the guide assembly in the prior art;

[0035] Figure 2 This is a schematic diagram of the structure of this utility model;

[0036] Figure 3 This is a structural schematic diagram of the present invention from another perspective;

[0037] Figure 4 This is a top view of the present invention;

[0038] Figure 5 for Figure 4 AA sectional view.

[0039] In the diagram: 100, outer cylinder; 200, guide; 210, annular boss; 300, oil seal; 310, metal skeleton; 320, rubber body; 321, annular sealing body;

[0040] 1. Machine body; 11. Frame; 12. Horizontal worktable; 121. Slide groove; 2. Centering clamping assembly; 21. Gearbox; 22. Transmission screw; 23. Threaded clamp; 24. Drive motor; 3. Auxiliary guide cylinder; 31. Lower cylindrical section; 32. Upper conical section; 4. Pressing assembly; 41. Telescopic device; 42. Pressing plate; 43. Pressing head; 5. Elastic guide assembly; 51. Guide rod; 511. Limiting part; 52. Guide sleeve; 53. Spring. Detailed Implementation

[0041] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if terms such as "upper", "lower", "front", "rear", "left", "right" indicate orientation or positional relationship, they are only corresponding to the drawings of this application for the convenience of describing the present invention. It should be understood that if terms such as "end", "side", "end portion", "side part", "lateral", "longitudinal", etc. indicate orientation or positional relationship, they are only corresponding to the length and width of the corresponding component. That is, "end" indicates the head and tail area in the length direction of the corresponding component, and "side part" indicates the head and tail area in the width direction of the corresponding component. They are used for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation.

[0042] Example 1, in conjunction with Appendix Figure 2-5 An assembly device for an oil seal and guide includes:

[0043] The machine body 1 consists of a frame 11 and a horizontal worktable 12. The horizontal worktable 12 is fixed inside the frame 11 and is used to support the assembly components.

[0044] Centering clamping assembly 2, installed on the horizontal worktable 12, is used for automatic centering clamping of the outer cylinder 100, including:

[0045] The gearbox 21 is located in the middle of the lower surface of the horizontal worktable 12. At least three output shafts (such as 3 or 4) are evenly distributed around it. Each output shaft rotates at the same speed, and each output shaft is coaxially connected to a transmission screw 22.

[0046] In one possible implementation, the gearbox 21 has a vertically penetrating input shaft in the middle of its bottom surface, and a driving bevel gear is fixedly sleeved on the inner end of the input shaft; the side wall of the gearbox 21 is provided with 3 or 4 output shafts arranged radially along its circumference at uniform intervals, and a driven bevel gear is fixedly sleeved on the inner end of each output shaft, and the driven bevel gear meshes with the driving bevel gear.

[0047] The threaded clamp 23 is threadedly engaged with the transmission screw 22, and its upper end extends out of the worktable through the slide groove 121.

[0048] The drive motor 24, whose output shaft is connected to the input shaft of the gearbox 21, drives all the transmission screws 22 to rotate synchronously, so that the threaded clamping blocks 23 move radially synchronously, thereby achieving precise centering and clamping of the outer cylinder 100.

[0049] The slide 121 is located above the transmission screw 22 on the horizontal worktable 12.

[0050] The auxiliary guide cylinder 3 is coaxially mounted on the upper end of the outer cylinder 100 and is integrally formed by the lower cylindrical section 31 and the upper conical section 32. The upper conical section 32 provides a tapered guide surface to guide the smooth contraction of the expanded annular sealing body 321.

[0051] As needed, the inner diameter of the lower cylindrical section 31 is not greater than the inner diameter of the outer cylinder 100; preferably, the difference is 0.05~0.1mm, to prevent the inner edge of the top surface of the outer cylinder 100 from protruding, which could cause the annular seal 321 to be damaged by the shearing force at the end of the outer cylinder 100. By using a difference of 0.05~0.1mm between the inner diameter of the lower cylindrical section 31 and the inner diameter of the outer cylinder 100, the sliding accuracy of the guide rod 51 and the limiting part 511 in the elastic guide assembly 5, as well as the transmission accuracy of the threaded clamp 23 and the transmission screw 22, are compensated, ensuring that the inner edge of the top surface of the outer cylinder 100 does not leak out.

[0052] The downward pressing component 4, located at the top of the frame 11, includes:

[0053] Telescopic device 41 (such as a hydraulic cylinder / pneumatic cylinder) is installed with the telescopic end facing downwards;

[0054] The lower pressure plate 42 is connected to the telescopic end of the telescopic device 41, and both ends are slidably connected to the frame 11 through linear slide rail pairs;

[0055] Lower pressure head 43: fixed to the bottom surface of the lower pressure plate 42 and coaxially aligned with the outer cylinder 100.

[0056] The elastic guide assembly 5 has two sets, symmetrically arranged on both sides of the auxiliary guide cylinder 3, to ensure coaxial floating engagement with the outer cylinder 100, including:

[0057] The guide rod 51 is fixed at the upper end to the pressing component 4 and has a limiting part 511 at the lower end;

[0058] Guide sleeve 52: fixed to the outer wall of the auxiliary guide cylinder 3 and slidably sleeved on the guide rod 51;

[0059] Spring 53: Sleeves on guide rod 51, located above guide sleeve 52.

[0060] Working principle:

[0061] First, the outer cylinder 100 is placed vertically in the middle of the upper surface of the horizontal worktable 12. The drive motor 24 is started. The drive motor 24 drives all the transmission screws 22 to rotate synchronously through the gearbox 21, so that all the threaded clamps 23 move inward and center and clamp the outer cylinder 100.

[0062] Then, start the telescopic device 41. The telescopic device 41 drives the lower pressure plate 42 and the auxiliary guide cylinder 3 to descend until the auxiliary guide cylinder 3 touches the upper end face of the outer cylinder 100, and the telescopic device 41 stops running.

[0063] Then, the assembly of the guide 200 and the oil seal 300 is placed coaxially inside the auxiliary guide cylinder 3;

[0064] Finally, the telescopic device 41 is activated again. The telescopic device 41 drives the lower pressure plate 42 to descend, and the lower pressure head 43 pushes the assembly into the auxiliary guide cylinder 3. The upper conical cylinder section 32 gradually compresses the annular sealing body 321, and the lower cylindrical cylinder section 31 guides the assembly to slide precisely into the outer cylinder 100, completing the assembly operation.

[0065] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims in this utility model, and no reference numerals in the claims should be regarded as limiting the content of the claims.

Claims

1. An assembly device for an oil seal and guide, characterized in that, include: The machine body (1) has a frame (11) and a horizontal worktable (12) located inside the frame (11). A centering clamping assembly (2) is provided on the horizontal worktable (12) for centering and clamping the outer cylinder (100); The auxiliary guide cylinder (3) has a lower cylindrical section (31) and an upper conical section (32), which are coaxially disposed at the upper end of the outer cylinder (100); The pressing assembly (4) is located on the top of the frame (11) and is used to press the assembly of the guide (200) and the oil seal (300) into the outer cylinder (100) through the auxiliary guide cylinder (3); The inner diameter of the lower cylindrical section (31) is not greater than the inner diameter of the outer cylinder (100).

2. An oil seal and deflector assembly according to claim 1, wherein: The difference between the inner diameter of the lower cylindrical section (31) and the inner diameter of the outer cylinder (100) is 0.05~0.1mm.

3. An oil seal and deflector assembly as defined in claim 1 wherein: The auxiliary guide cylinder (3) is installed below the pressing part of the pressing component (4) through the elastic guide component (5) to ensure that the auxiliary guide cylinder (3) and the outer cylinder (100) are coaxially engaged.

4. The assembly device for an oil seal and guide according to claim 3, characterized in that: The elastic guiding component (5) includes: The guide rod (51) is installed at the upper end on the pressing part of the pressing assembly (4) and has a limiting part (511) at the lower end. The guide sleeve (52) is fixedly installed on the outer wall of the auxiliary guide cylinder (3) and slidably sleeved on the guide rod (51); Spring (53) is sleeved on the body of the guide rod (51) and located above the guide sleeve (52); The elastic guide component (5) has two sets and is symmetrically arranged on both sides of the auxiliary guide cylinder (3).

5. The assembly device for an oil seal and guide according to claim 1, characterized in that: The centering clamping assembly (2) includes: The gearbox (21) is located in the middle of the lower surface of the horizontal worktable (12), and has at least three output shafts with the same rotation speed along its circumference. Each output shaft is coaxially connected to a transmission screw (22). The threaded clamps (23) are matched one-to-one with the transmission screws (22); The drive motor (24) has its output shaft connected to the input shaft of the gearbox (21); The horizontal worktable (12) is provided with a slide groove (121) above the transmission screw (22), and the upper end of the threaded clamp (23) extends out of the slide groove (121) to clamp the outer cylinder (100).

6. The assembly device for an oil seal and guide according to claim 1, characterized in that: The pressing component (4) includes: Telescopic device (41) is installed on the top of the frame (11) with the telescopic end facing downward; The lower pressure plate (42) is located at the telescopic end of the telescopic device (41); The lower pressure head (43) is located on the lower plate surface of the lower pressure plate (42) and is coaxially located above the outer cylinder (100).

7. The assembly device for an oil seal and guide according to claim 6, characterized in that: The two ends of the lower pressure plate (42) are slidably connected to both sides of the frame (11) via linear slide rail pairs.

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