Locking device for electric vehicle shock absorber screw

Abstract

The utility model belongs to the technical field of shock absorber screws, in particular to a locking device of a shock absorber screw of an electric vehicle, which comprises a bolt and a matching nut, a primary locking device is arranged on the outer surface of the bolt, the locking device comprises a locking wedge-shaped gasket, and the locking wedge-shaped gasket locks the matching nut. According to the locking device for the shock absorber screw of the electric vehicle, one end of the matched nut can be locked by arranging the first-stage locking device, the matched wedge-shaped gasket can press the locking wedge-shaped gasket along the tooth shape when the matched nut rotates by utilizing the matching of the opposite locking wedge-shaped gasket and the matched wedge-shaped gasket, and the locking wedge-shaped gasket can be locked by the first-stage locking device. When the matching wedge-shaped gasket rotates reversely, ratchets of the matching wedge-shaped gasket and the locking wedge-shaped gasket are connected in an inserted mode, elastic force of the connecting spring ring extrudes the locking wedge-shaped gasket to enable the locking wedge-shaped gasket to be attached to the small matching wedge-shaped gasket, and the matching wedge-shaped gasket cannot rotate. And therefore, the matching nut cannot rotate.

Description

Technical Field

[0001] This utility model relates to the field of shock absorber screw technology, and in particular to a locking device for shock absorber screws of electric vehicles. Background Technology

[0002] Shock absorber bolts are high-strength threaded fastener systems used to fix the shock absorber body (such as the front fork tube and rear shock absorber cylinder) to the vehicle body structure (such as the frame hanger, rocker arm, and wheel axle). They typically consist of a combination of bolts (or studs) and nuts, and withstand dynamic alternating loads in a vibration environment.

[0003] Chinese Patent No. CN222406745U discloses an automotive shock absorber for preventing bolt detachment, relating to the field of automotive shock absorber technology. The invention includes a lifting ring, a support base fixedly connected to the bottom end of the lifting ring, a connector fixedly connected to the bottom end of the support base, an upper washer fixedly connected to the bottom end of the connector, an upper base fixedly connected to the bottom end of the upper washer, a rubber sleeve fixedly connected to the bottom end of the upper base, a lower base fixedly connected to the bottom end of the rubber sleeve, and a support shaft fixedly connected to the bottom end of the lower base. This invention, through the coordinated arrangement of the lifting ring, support base, upper washer, connector, upper base, rubber sleeve, and lower base, effectively improves the protective properties of the device, increases the service life of the automotive shock absorber, and effectively enhances the shock absorber's performance, achieving stable shock absorption. It solves the problem of poor protective performance and short service life in existing automotive shock absorbers.

[0004] However, in the above solution, multiple bolt bodies are connected to the fixing nuts for bolt fixing. The second fixing pad and the first fixing pad are subjected to force by the second spring to prevent them from falling off. This requires tightening multiple bolt bodies and fixing nuts, which reduces installation efficiency. Moreover, the anti-loosening effect is weak because it is only achieved by the second spring. Under the high-frequency vibration of the shock absorber, multiple bolt bodies and fixing nuts will still loosen, affecting the use of the shock absorber. Utility Model Content

[0005] Based on the existing problems of the locking device for shock absorber bolts requiring multiple bolts to be tightened in stages, resulting in low efficiency, insufficient spring anti-loosening force, easy high-frequency failure, and uneven preload between bolts, this utility model proposes a locking device for electric vehicle shock absorber bolts.

[0006] This utility model proposes a locking device for a shock absorber screw in an electric vehicle, comprising a bolt and a mating nut. The outer surface of the bolt is provided with a primary locking device, which includes a locking wedge washer that locks the mating nut.

[0007] The outer surface of the mating nut is provided with a two-stage locking device, which includes a movable wedge sleeve. The movement of the movable wedge sleeve locks the mating nut.

[0008] Preferably, the primary locking device further includes a positioning nut, the inner wall of which is threadedly connected to the outer surface of the bolt, and a connecting spring ring is fixedly welded to the outer surface of the positioning nut, the outer surface of which is fixedly welded to the outer surface of the locking wedge washer.

[0009] Through the above technical solution, the connecting spring ring can provide elasticity for the locking wedge washer, so that when the locking wedge washer rotates on the bolt with the mating nut, the locking wedge washer can press the connecting spring ring, and the mating nut can rotate smoothly. When it is necessary to disassemble the mating nut, the connecting spring ring is pressed with a tool, so that the connecting spring ring drives the locking wedge washer to move, thereby releasing the fixation of the mating nut.

[0010] Preferably, a mating wedge washer is fixedly installed on the outer surface of the mating nut, and the outer surface of the mating wedge washer is slidably inserted into the outer surface of the locking wedge washer.

[0011] Through the above technical solution, the surface shape of the locking wedge washer is a unidirectional ratchet array (tooth angle: 5° in the forward direction / 60° in the reverse direction). The tooth shape of the mating wedge washer matches the ratchet of the locking wedge washer. Thus, when the mating nut rotates, the mating wedge washer can press and lock the wedge washer along the tooth shape, making it easier for the mating nut to rotate after the locking wedge washer moves. However, when the mating wedge washer is reversed, the ratchet of the mating wedge washer and the locking wedge washer are inserted, and the elasticity of the connecting spring ring squeezes the locking wedge washer so that it fits against the mating small wedge washer, making the mating wedge washer unable to rotate.

[0012] Preferably, a threaded sleeve is fixedly bonded to the inner wall of the mating nut, and the inner wall of the mating nut is threadedly connected to the outer surface of the bolt through the threaded sleeve.

[0013] The above technical solution strengthens the fixing of the nut by increasing the friction between the threaded sleeve and the bolt, while reducing damage to the thread groove. The threaded sleeve is made of rubber and is attached to the threaded contact surface. Its main function is to absorb vibration and impact during vehicle movement and reduce the risk of loosening of the threaded connection due to vibration.

[0014] Preferably, the secondary locking device further includes a positioning sleeve, which is fixedly installed on the outer surface of the mating nut. A fixing wedge sleeve is fixedly installed on the outer surface of the mating nut, and the fixing wedge sleeve is located inside the positioning sleeve.

[0015] Through the above technical solution, in order to fix the mating nut for the second time, the positioning sleeve is fixed, thereby fixing the other end of the mating nut and maintaining the stability of the mating nut.

[0016] Preferably, the outer surface of the bolt is threaded with a movable nut, and the outer surface of the movable nut is fixedly installed with the outer surface of the movable wedge sleeve.

[0017] Through the above technical solution, in order to facilitate the fixing of the mating nut, the movable wedge sleeve can be moved by the threaded connection between the movable nut bolt.

[0018] Preferably, an expansion sleeve is slidably inserted into the inner wall of the positioning sleeve, and a rubber sleeve is fixedly bonded to the inner wall of the expansion sleeve. The inner walls of both ends of the rubber sleeve are slidably connected to the outer surfaces of the movable wedge sleeve and the fixed wedge sleeve, respectively.

[0019] Through the above technical solution, by inserting the expansion sleeve into the positioning sleeve, the movement of the movable wedge sleeve can push the expansion sleeve to move within the positioning sleeve. At the same time, the movable wedge sleeve and the fixed wedge sleeve can increase the outer diameter of the expansion sleeve and tighten the positioning sleeve, thereby fixing and limiting the other end of the mating nut. The rubber sleeve can increase the friction, and the expansion sleeve is made of steel.

[0020] The beneficial effects of this utility model are as follows:

[0021] 1. By setting a primary locking device, one end of the mating nut can be locked. Utilizing the engagement of the locking wedge washer and the mating wedge washer, the mating wedge washer presses against the locking wedge washer along the toothed shape when the mating nut rotates. This allows the mating nut to rotate easily after the locking wedge washer moves. However, when the mating wedge washer reverses, the ratchet engagement of the mating wedge washer and the elasticity of the connecting spring ring compresses the locking wedge washer, making it fit snugly against the mating wedge washer, preventing it from rotating. When the mating nut and the positioning nut are subjected to vibration, the positioning nut undergoes slight displacement, causing the connecting spring ring to push the locking wedge washer to move. This results in an even closer fit between the locking wedge washer and the mating wedge washer, further preventing the mating nut from rotating. This increases the stability of the electric vehicle shock absorber and solves the technical problems of existing shock absorber bolt locking devices that require multiple bolts to be tightened in stages, resulting in low efficiency, insufficient spring anti-loosening force, high-frequency failure, and uneven preload between bolts.

[0022] 2. By setting a two-stage locking device, the other end of the mating nut can be locked. By inserting the expansion sleeve into the positioning sleeve, the movement of the moving wedge sleeve can push the expansion sleeve to move within the positioning sleeve. At the same time, the moving wedge sleeve and the fixed wedge sleeve can increase the outer diameter of the expansion sleeve, tightening the positioning sleeve, thereby fixing and limiting the other end of the mating nut. The rubber sleeve can increase the friction, thereby fixing the mating nut. Meanwhile, the expansion sleeve can be disassembled by rotating the moving nut. This solves the technical problems of existing shock absorber bolt locking devices that require multiple bolts to be tightened in stages, resulting in low efficiency, insufficient spring anti-loosening force, easy high-frequency failure, and uneven preload between bolts. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a locking device for a shock absorber screw in an electric vehicle, as proposed in this utility model.

[0024] Figure 2 This is a perspective view of the locking device and nut structure for an electric vehicle shock absorber screw according to the present invention.

[0025] Figure 3 This is a perspective view of the locking wedge washer structure of a locking device for a shock absorber screw in an electric vehicle, as proposed in this utility model.

[0026] Figure 4 This is a perspective view of the wedge-shaped washer structure of the locking device for the shock absorber screw of an electric vehicle proposed in this utility model;

[0027] Figure 5 This is a perspective view of the threaded sleeve structure of a locking device for a shock absorber screw in an electric vehicle, as proposed in this utility model.

[0028] Figure 6 This is a perspective view of the positioning sleeve structure of a locking device for a shock absorber screw in an electric vehicle, as proposed in this utility model.

[0029] Figure 7 This is a perspective view of the expansion sleeve structure of a locking device for a shock absorber screw in an electric vehicle, as proposed in this utility model.

[0030] In the diagram: 1. Bolt; 11. Mating nut; 12. Threaded sleeve; 2. Locating nut; 21. Connecting spring ring; 22. Locking wedge washer; 23. Mating wedge washer; 3. Locating sleeve; 31. Fixed wedge sleeve; 32. Moving nut; 33. Moving wedge sleeve; 34. Expansion sleeve; 35. Rubber sleeve. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0032] Reference Figures 1-7 A locking device for a shock absorber screw of an electric vehicle includes a bolt 1 and a mating nut 11. The outer surface of the bolt 1 is provided with a primary locking device, which includes a locking wedge washer 22, and the locking wedge washer 22 locks the mating nut 11.

[0033] Specifically, to increase the stability of the mating bolt 1, the first-stage locking device also includes a positioning nut 2. The inner wall of the positioning nut 2 is threadedly connected to the outer surface of the bolt 1. A connecting spring ring 21 is fixedly welded to the outer surface of the positioning nut 2. The outer surface of the connecting spring ring 21 is fixedly welded to the outer surface of the locking wedge washer 22. The surface shape of the locking wedge washer 22 is a unidirectional ratchet array with a tooth angle of 5° in the positive direction and 60° in the negative direction. The connecting spring ring 21 provides elasticity to the locking wedge washer 22, so that when the mating nut 11 rotates on the bolt 1, the locking wedge washer 22 can press the connecting spring ring 21, allowing the mating nut 11 to rotate smoothly. At the same time, the connecting spring ring 21 can convert vibration energy into locking force. When it is necessary to disassemble the mating nut 11, the connecting spring ring 21 is pressed with a tool, causing the connecting spring ring 21 to move the locking wedge washer 22, thereby releasing the fixation of the mating nut 11.

[0034] Specifically, to prevent the mating nut 11 from reversing, a mating wedge washer 23 is fixedly installed on the outer surface of the mating nut 11. The outer surface of the mating wedge washer 23 slides into contact with the outer surface of the locking wedge washer 22. The teeth of the mating wedge washer 23 match the ratchet of the locking wedge washer 22. Thus, when the mating nut 11 rotates, the mating wedge washer 23 can press the locking wedge washer 22 along the teeth, making it easier for the mating nut 11 to rotate after the locking wedge washer 22 moves. However, when the mating wedge washer 23 reverses, the ratchet of the mating wedge washer 23 and the locking wedge washer 22 engages, and the elasticity of the connecting spring ring 21 squeezes the locking wedge washer 22 so that it fits against the mating wedge washer, making it impossible for the mating wedge washer 23 to rotate.

[0035] Specifically, to increase the tightness between the mating nut 11 and the bolt 1, a threaded sleeve 12 is fixedly bonded to the inner wall of the mating nut 11. The inner wall of the mating nut 11 is threadedly connected to the outer surface of the bolt 1 through the threaded sleeve 12. In order to strengthen the fixation of the mating nut 11, the threaded sleeve 12 increases the friction between the nut and the bolt 1 and reduces damage to the thread groove. The threaded sleeve 12 is made of rubber and is attached to the threaded contact surface. Its main function is to absorb vibration and impact during vehicle movement and reduce the risk of loosening of the threaded connection due to vibration.

[0036] By setting a primary locking device, one end of the mating nut 11 can be locked. Utilizing the engagement of the corresponding locking wedge washer 22 and mating wedge washer 23, the mating wedge washer 23 presses against the locking wedge washer 22 along its toothed shape when the mating nut 11 rotates. This facilitates the rotation of the mating nut 11 after the locking wedge washer 22 moves. However, when the mating wedge washer 23 reverses direction, the ratchet engagement of the mating wedge washer 23 and the locking wedge washer 22, along with the elastic force of the connecting spring ring 21, compresses the locking wedge washer 22, causing it to fit snugly against the mating fine wedge washer, thus ensuring a smooth mating process. The wedge washer 23 cannot rotate. When the mating nut 11 and the positioning nut 2 are subjected to vibration, the positioning nut 2 will undergo slight displacement. This will cause the connecting spring ring 21 to push the locking wedge washer 22 to move, and the locking wedge washer 22 and the mating wedge washer 23 will fit more closely. This will prevent the mating nut 11 from rotating, thereby increasing the stability of the electric vehicle shock absorber. This solves the technical problems of the existing shock absorber bolt 1 locking device, which requires multiple bolts 1 to be tightened in stages, resulting in low efficiency, insufficient spring anti-loosening force, easy high-frequency failure, and uneven preload between bolts 1.

[0037] To increase the stability of the mating nut 11, a two-stage locking device is provided on the outer surface of the mating nut 11. The two-stage locking device includes a movable wedge sleeve 33, and the movement of the movable wedge sleeve 33 locks the mating nut 11.

[0038] Specifically, in order to fix the other end of the mating nut 11, the secondary locking device also includes a positioning sleeve 3, which is fixedly installed on the outer surface of the mating nut 11. A fixing wedge sleeve 31 is fixedly installed on the outer surface of the mating nut 11, and the fixing wedge sleeve 31 is located inside the positioning sleeve 3.

[0039] Specifically, in order to facilitate the positioning sleeve 3 to limit the position, the outer surface of the bolt 1 is threaded with a movable nut 32, and the outer surface of the movable nut 32 is fixedly installed with the outer surface of the movable wedge sleeve 33.

[0040] Specifically, an expansion sleeve 34 is slidably inserted into the inner wall of the positioning sleeve 3, and a rubber sleeve 35 is fixedly bonded to the inner wall of the expansion sleeve 34. The inner walls of both ends of the rubber sleeve 35 are slidably connected to the outer surfaces of the movable wedge sleeve 33 and the fixed wedge sleeve 31, respectively. By inserting the expansion sleeve 34 into the positioning sleeve 3, the movement of the movable wedge sleeve 33 can push the expansion sleeve 34 to move within the positioning sleeve 3. At the same time, the movable wedge sleeve 33 and the fixed wedge sleeve 31 can increase the outer diameter of the expansion sleeve 34, thereby tightening the positioning sleeve 3 and fixing and limiting the other end of the mating nut 11. The rubber sleeve 35 can increase the friction, and the expansion sleeve 34 is made of steel.

[0041] By setting a two-stage locking device, the other end of the mating nut 11 can be locked. By inserting the expansion sleeve 34 into the positioning sleeve 3, the movement of the moving wedge sleeve 33 can push the expansion sleeve 34 to move within the positioning sleeve 3. At the same time, the moving wedge sleeve 33 and the fixed wedge sleeve 31 can increase the outer diameter of the expansion sleeve 34 and tighten the positioning sleeve 3, thereby fixing and limiting the other end of the mating nut 11. The rubber sleeve 35 can increase the friction, thereby fixing the mating nut 11. Meanwhile, the expansion sleeve 34 can be disassembled by rotating the moving nut 32. This solves the technical problems of the existing shock absorber bolt 1 locking device, which requires multiple bolts 1 to be tightened in stages, resulting in low efficiency, insufficient spring anti-loosening force, easy high-frequency failure, and uneven preload between bolts 1.

[0042] Working principle: After the positioning nut 2 is rotated onto the bolt 1, it fits against the outer surface of the shock absorber. Then, the thread of the mating nut 11 is screwed into one end of the bolt 1. The mating wedge washer 23 squeezes and locks the outer surface of the wedge washer 22, so that the connecting spring ring 21 is compressed. After the mating nut 11 is locked to the set position, the mating wedge washer 23 and the locking wedge washer 22 are inserted together.

[0043] After the expansion sleeve 34 is inserted into the positioning sleeve 3 of the mating nut 11, the movable nut 32 is rotated into one end of the bolt 1. The movable wedge sleeve 33 on the movable nut 32 squeezes the rubber sleeve 35 inside the expansion sleeve 34. The inner wall of the rubber sleeve 35 inside the expansion sleeve 34 squeezes the outer surface of the fixed wedge sleeve 31, and the outer diameter of the expansion sleeve 34 increases to tighten the positioning sleeve 3.

[0044] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A locking device for a shock absorber screw in an electric vehicle, comprising a bolt (1) and a mating nut (11), characterized in that: The outer surface of the bolt (1) is provided with a first-stage locking device, which includes a locking wedge washer (22) and the locking wedge washer (22) locks the mating nut (11); The outer surface of the mating nut (11) is provided with a secondary locking device, which includes a movable wedge sleeve (33). The movement of the movable wedge sleeve (33) locks the mating nut (11).

2. The locking device for a shock absorber screw in an electric vehicle according to claim 1, characterized in that: The primary locking device also includes a positioning nut (2), the inner wall of which is threaded to the outer surface of the bolt (1), and a connecting spring ring (21) is fixedly welded to the outer surface of the positioning nut (2), and the outer surface of the connecting spring ring (21) is fixedly welded to the outer surface of the locking wedge washer (22).

3. The locking device for electric vehicle shock absorber screws according to claim 1, characterized in that: A mating wedge washer (23) is fixedly installed on the outer surface of the mating nut (11), and the outer surface of the mating wedge washer (23) is slidably inserted into the outer surface of the locking wedge washer (22).

4. The locking device for a shock absorber screw in an electric vehicle according to claim 1, characterized in that: The inner wall of the mating nut (11) is fixedly bonded with a threaded sleeve (12), and the inner wall of the mating nut (11) is threadedly connected to the outer surface of the bolt (1) through the threaded sleeve (12).

5. The locking device for a shock absorber screw in an electric vehicle according to claim 1, characterized in that: The secondary locking device also includes a positioning sleeve (3), which is fixedly installed on the outer surface of the mating nut (11). A fixing wedge sleeve (31) is fixedly installed on the outer surface of the mating nut (11), and the fixing wedge sleeve (31) is located inside the positioning sleeve (3).

6. The locking device for a shock absorber screw in an electric vehicle according to claim 1, characterized in that: The outer surface of the bolt (1) is threaded with a movable nut (32), and the outer surface of the movable nut (32) is fixedly installed with the outer surface of the movable wedge sleeve (33).

7. A locking device for an electric vehicle shock absorber screw according to claim 5, characterized in that: The inner wall of the positioning sleeve (3) is slidably inserted with an expansion sleeve (34), and the inner wall of the expansion sleeve (34) is fixedly bonded with a rubber sleeve (35). The inner walls of the two ends of the rubber sleeve (35) are slidably connected to the outer surfaces of the movable wedge sleeve (33) and the fixed wedge sleeve (31), respectively.

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