Anti-loosening device for shock absorber fastener

Abstract

This utility model discloses a device for preventing loosening of fasteners on shock absorbers. It mainly includes a frame, a driving component fixed on the frame, and a first lifting plate fixed to the output end of the driving component. The first lifting plate is slidably connected to the frame. A pressure rod is provided at the lower end of the first lifting plate, and a second lifting plate is provided below the pressure rod. A pin is provided on the lower end face of the second lifting plate, with the lower end of the pin being tapered. The maximum diameter of the pin's lower end is larger than the diameter of the inscribed circle of the hexagonal groove of the headless screw. Two first guide rods are arranged parallel to each other on the frame for sliding installation of the second lifting plate. A return spring is sleeved on the outer side of each of the two first guide rods, and the upper ends of both return springs abut against the lower end of the second lifting plate to drive the lifting plate to rise and return to its original position. The frame also includes a fixture seat for positioning and installing the shock absorber, with a positioning slot for embedding and fixing the shock absorber housing. This application improves the anti-loosening effect of headless screws on shock absorbers.

Description

Technical Field

[0001] This utility model relates to the field of shock absorber manufacturing technology, and in particular to a shock absorber fastener anti-loosening treatment device. Background Technology

[0002] Currently, shock absorbers are used to suppress the oscillations caused by the rebound of springs after absorbing shocks, as well as impacts from the road surface. They are widely used in automobiles to accelerate the attenuation of vibrations in the chassis and body, thereby improving ride comfort. When driving over uneven roads, although the shock-absorbing springs can filter road vibrations, the springs themselves still undergo reciprocating motion; the shock absorber is used to suppress this spring bounce. The mounting part of the shock absorber housing is secured with headless screws. In environments with frequent vibrations, these fasteners are prone to loosening. Currently, the main method for preventing loosening of screws is to apply anti-loosening adhesive, but its effectiveness is limited, and therefore, improvement is needed. Utility Model Content

[0003] In view of the problems existing in the prior art, the purpose of this utility model is to provide a fastener anti-loosening treatment device for shock absorbers, which can improve the anti-loosening effect of headless screws on shock absorbers.

[0004] To solve the above problems, the present invention adopts the following technical solution.

[0005] A shock absorber fastener anti-loosening treatment device includes a frame, a driving component fixed on the frame, a first lifting plate provided at the output end of the driving component, the first lifting plate being slidably connected to the frame, a pressure rod provided at the lower end of the first lifting plate, a second lifting plate provided below the pressure rod, a pin provided at the lower end face of the second lifting plate, the lower end of the pin being tapered, the maximum diameter of the lower end of the pin being larger than the diameter of the inscribed circle of the internal hexagonal groove of the headless screw, two first guide rods parallel to each other on the frame for sliding installation of the second lifting plate, a return spring sleeved on the outer side of each of the two first guide rods, the upper ends of the two return springs abutting against the lower end of the second lifting plate to drive the lifting plate to rise and return to its original position, and a fixture seat for positioning and installing the shock absorber on the frame.

[0006] By adopting the above technical solution, the first lifting plate is driven to rise and fall by the driving component, which in turn drives the pressure rod to press against the second lifting plate. The second lifting plate is equipped with a pin, which goes down and inserts into the internal hexagonal groove of the headless screw. The internal hexagonal groove of the headless screw is deformed by physical pressure. At the same time, the external support makes the headless screw and the corresponding mounting hole form a locked state, which improves the anti-loosening effect of the headless screw on the shock absorber and improves the connection stability.

[0007] In one possible implementation, a reinforcing plate is provided at the upper end of the first guide rod, the reinforcing plate is located above the second lifting plate, and the reinforcing plate is provided with a clearance groove for the pressure rod to move up and down.

[0008] By adopting the above technical solution, the reinforcement plate enhances the installation stability of the two first guide rods, thereby ensuring the lifting stability of the second lifting plate.

[0009] In one possible implementation, the second lifting plate is provided with a through hole for mounting the ejector pin, the ejector pin is interference-fitted into the through hole, the upper end of the ejector pin is flush with the upper surface of the second lifting plate, and the pressure rod is coaxial with the ejector pin.

[0010] By adopting the above technical solution, the design of the through hole and the ejector pin increases the contact area of ​​the ejector pin and improves the connection stability of the ejector pin. At the same time, the position of the ejector pin can also be ensured by the pressing action of the pressure rod.

[0011] In one possible implementation, the ejector pin includes a guide portion, an outer support portion, and a fixing portion in sequence. The fixing portion is connected to the second lifting plate. The guide portion is used for alignment and correction between the ejector pin and the internal hexagonal groove of the headless screw. The maximum diameter of the outer support portion is 0.4 mm to 0.6 mm larger than the diameter of the inscribed circle of the internal hexagonal groove of the headless screw.

[0012] By adopting the above technical solution, the guide part is used for docking and correction, and the outer support part is used to apply physical pressure to the internal hexagonal groove.

[0013] Compared with existing technologies, the advantages of this utility model are:

[0014] 1. The first lifting plate is raised and lowered by the driving component, which in turn drives the pressure rod to press against the second lifting plate. The second lifting plate is equipped with a pin. The pin moves downward and inserts into the internal hexagonal groove of the headless screw. The internal hexagonal groove of the headless screw is deformed by physical pressure. At the same time, the external support makes the headless screw and the corresponding mounting hole form a locked state, which improves the anti-loosening effect of the headless screw on the shock absorber and improves the connection stability. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the shock absorber fastener anti-loosening treatment device according to an embodiment of this application;

[0016] Figure 2 This is a cross-sectional view of the ejector pin in an embodiment of this application.

[0017] Explanation of the labels in the diagram:

[0018] 1. Frame; 2. Drive unit; 3. First lifting plate; 4. Pressure rod; 5. Second lifting plate; 6. Ejector pin; 61. Guide part; 62. External support part; 63. Fixing part; 7. First guide rod; 8. Return spring; 9. Fixture seat; 10. Positioning slot; 11. Reinforcing plate; 12. Relief slot; 13. Through hole; 14. Headless screw; 15. Socket hexagonal slot. Detailed Implementation

[0019] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0020] This application discloses a device for preventing loosening of shock absorber fasteners. (Refer to...) Figures 1-2 The system includes a frame 1, on which a drive unit 2 is fixed. The drive unit 2 is configured as a cylinder. A first lifting plate 3 is fixed to the output end of the drive unit 2. The first lifting plate 3 is slidably connected to the frame 1. A pressure rod 4 is provided at the lower end of the first lifting plate 3. A second lifting plate 5 is provided below the pressure rod 4. A pin 6 is provided on the lower end face of the second lifting plate 5. The lower end of the pin 6 is tapered. The maximum diameter of the lower end of the pin 6 is larger than the diameter of the inscribed circle of the internal hexagonal groove 15 of the headless screw 14. Two first guide rods 7 are arranged parallel to each other on the frame 1 for sliding installation of the second lifting plate 5. A return spring 8 is sleeved on the outer side of each of the two first guide rods 7. The upper ends of the two return springs 8 abut against the lower end of the second lifting plate 5 to drive the lifting plate to rise and return to its original position. The frame 1 also has a fixture seat 9 for positioning and installing the shock absorber. The fixture seat 9 has a positioning slot 10 for embedding and fixing the shock absorber housing. The specific structure of the fixture seat 9 is designed according to the external structure of the shock absorber. In this example, the reset spring 8 is set as a compression spring.

[0021] Furthermore, the upper ends of the two first guide rods 7 are fixed with reinforcing plates 11, which are located on the upper side of the second lifting plate 5. The reinforcing plates 11 are provided with relief grooves 12 for the pressure rods 4 to move up and down.

[0022] The second lifting plate 5 is provided with a through hole 13 for mounting the ejector pin 6. The ejector pin 6 is interference-fitted into the through hole 13. The upper end of the ejector pin 6 is flush with the upper surface of the second lifting plate 5. The pressure rod 4 is coaxial with the ejector pin 6.

[0023] The ejector pin 6 includes a guide part 61, an outer support part 62, and a fixing part 63 in sequence. The fixing part 63 is connected to the second lifting plate 5. The guide part 61 is used for the alignment and correction of the ejector pin 6 with the internal hexagonal groove 15 of the headless screw 14. The maximum diameter of the outer support part 62 is larger than the diameter of the inscribed circle of the internal hexagonal groove 15 of the headless screw 14, and the diameter difference is between 0.4 mm and 0.6 mm.

[0024] The implementation principle of the shock absorber fastener anti-loosening treatment device in this application embodiment is as follows: The shock absorber is placed on the fixture seat 9, at which time the axis of the headless screw 14 overlaps with the axis of the ejector pin 6. The drive unit 2 is activated to push the first lifting plate 3 to slide downward, and the pressure rod 4 pushes the second lifting plate 5 downward until the set stroke end point. When the pressure rod 4 pushes the second lifting plate 5 downward, the ejector pin 6 is inserted into the internal hexagonal groove 15 of the headless screw 14 to achieve the physical pressure expansion anti-loosening effect. During the whole process, the worker presses the shock absorber. After the expansion effect is completed, the drive unit 2 drives the first lifting plate 3 to move upward, and the second lifting plate 5 is reset under the action of the return spring 8. The worker can then take out the shock absorber.

[0025] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A device for preventing loosening of fasteners in shock absorbers, characterized in that, Includes a frame (1), on which a drive unit (2) is fixed. The output end of the drive unit (2) is provided with a first lifting plate (3), which is slidably connected to the frame (1). A pressure rod (4) is provided at the lower end of the first lifting plate (3), and a second lifting plate (5) is provided on the lower side of the pressure rod (4). A ejector pin (6) is provided on the lower end face of the second lifting plate (5). The lower end of the ejector pin (6) is cone-shaped. The lower end of the ejector pin (6) is straight. The maximum diameter is greater than the diameter of the inscribed circle of the internal hexagonal groove (15) of the headless screw (14). Two first guide rods (7) are arranged in parallel on the frame (1) for sliding installation of the second lifting plate (5). A return spring (8) is sleeved on the outer side of each of the two first guide rods (7). The upper ends of the two return springs (8) abut against the lower end of the second lifting plate (5) to drive the lifting plate to rise and reset. A fixture seat (9) for positioning and installing the shock absorber is also provided on the frame (1).

2. The anti-loosening device for shock absorber fasteners according to claim 1, characterized in that, A reinforcing plate (11) is provided on the upper end of the first guide rod (7). The reinforcing plate (11) is located on the upper side of the second lifting plate (5). A relief groove (12) is provided on the reinforcing plate (11) for the pressure rod (4) to move up and down.

3. The anti-loosening device for shock absorber fasteners according to claim 1, characterized in that, The second lifting plate (5) is provided with a through hole (13) for mounting the ejector pin (6). The ejector pin (6) is interference-fitted into the through hole (13). The upper end of the ejector pin (6) is flush with the upper surface of the second lifting plate (5). The pressure rod (4) is coaxial with the ejector pin (6).

4. The shock absorber fastener anti-loosening treatment device according to claim 1, characterized in that, The ejector pin (6) includes a guide part (61), an outer support part (62), and a fixing part (63) in sequence. The fixing part (63) is connected to the second lifting plate (5). The guide part (61) is used to correct and align the ejector pin (6) with the internal hexagonal groove (15) of the headless screw (14). The maximum diameter of the outer support part (62) is 0.4 mm to 0.6 mm larger than the diameter of the inscribed circle of the internal hexagonal groove (15) of the headless screw (14).

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