Anti-falling pin shaft

Abstract

The anti-falling pin shaft comprises a pin shaft body, a limiting block and a clamping spring, an inner groove is formed in the other end of the pin shaft body, two sliding through grooves communicated with the inner groove are symmetrically formed in the surface of the pin shaft body, a threaded shaft is rotationally connected to the interior of the inner groove, and a movable block is in threaded connection with the surface of the threaded shaft; the surface of the moving block is symmetrically and fixedly provided with two sliding blocks, the two sliding blocks are located in the two sliding through grooves correspondingly, inserting grooves are formed in the sides, away from the moving block, of the two sliding blocks correspondingly, clamping plates are symmetrically and fixedly installed in the clamping spring, and the two clamping plates are inserted into the two inserting grooves correspondingly to limit and fix the clamping spring; the anti-falling pin shaft is provided with the adjusting structure, and the adjusting structure can adjust the distance between the clamping spring and the limiting block, so that the pin shaft can stably and firmly adjust two parts during use, noise caused by loosening and collision of the parts is avoided, and the service life of the parts is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of pin technology, specifically a pin designed to prevent detachment. Background Technology

[0002] A pin is a standardized fastener that can provide both static fixation and relative movement with the connected parts. It is primarily used at the hinge joints of two parts to form a hinge connection. Pins are typically locked with cotter pins, ensuring reliable operation and easy disassembly.

[0003] Current pins typically have a large limiting block at one end and a retaining spring at the other. The distance between the limiting block and the retaining spring is fixed and cannot be adjusted. When this pin is used to connect two parts, if the distance between the two parts is less than the distance between the limiting block and the retaining spring, the two parts will become loose and collide, generating noise and reducing the service life of the parts. Therefore, to address the above problems, it is necessary to design an anti-dropping pin. Utility Model Content

[0004] To achieve the above objectives, this utility model provides the following technical solution: an anti-detachment pin, comprising a pin body, a limiting block at one end of the pin body, and a retaining spring located on the surface of the pin body. The other end of the pin body has an inner groove. The surface of the pin body has two symmetrical sliding grooves communicating with the inner groove. A threaded shaft is rotatably connected inside the inner groove. A movable block is threadedly connected to the surface of the threaded shaft. Two sliding blocks are symmetrically fixedly installed on the surface of the movable block. The two sliding blocks are located inside the two sliding grooves respectively. A slot is opened on the side of the two sliding blocks away from the movable block. A retaining plate is symmetrically fixedly installed inside the retaining spring. The two retaining plates are respectively inserted into the two slots to limit and fix the retaining spring.

[0005] Preferably, one end of the threaded shaft extends to the other end of the pin body and is fixedly installed with a nut. A round insert block located inside the inner groove is fixedly installed on one side of the nut. A groove is opened on the circumferential surface of the round insert block. A connecting pin is rotatably connected inside the groove. A ratchet is fixedly connected to the surface of the connecting pin. Both ends of the connecting pin are sleeved with torsion springs. The two ends of the two torsion springs are fixedly connected to the groove and the ratchet, respectively.

[0006] Preferably, a unidirectional limiting helical tooth matching the ratchet is fixedly installed at equal intervals in an arc shape on one side of the inner groove near the round insert, so that the threaded shaft can be rotated in one direction effectively and the moving block will not loosen during use.

[0007] Preferably, a pressing pin is fixedly installed in the middle of the ratchet, and an adjustment groove communicating with the groove is opened on the surface of the nut. An I-shaped pressing block is installed inside the adjustment groove. One end of the I-shaped pressing block contacts the pressing pin, and the other end of the pressing pin extends to the surface of the nut. A return spring is sleeved in the middle of the I-shaped pressing block. The two ends of the return spring are fixedly connected to the I-shaped pressing block and the adjustment groove, respectively, so as to effectively adjust the looseness of the retaining ring.

[0008] Compared with the prior art, the beneficial effects of this utility model are as follows: By providing a pin body, a limiting block, a retaining ring, an inner groove, a sliding through groove, a threaded shaft, a moving block, a sliding block, a slot, and a retaining plate, this anti-drop pin has an adjustment structure. This adjustment structure can adjust the distance between the retaining ring and the limiting block, so that the pin can stably and firmly support the two parts during use, avoiding noise caused by loosening and collision of the parts, and extending the service life of the parts. At the same time, this anti-drop pin has a fastening structure, which can ensure the stability of the adjustment structure after adjustment and ensure that the pin will not loosen or fall off. Furthermore, the anti-drop pin has a simple structural design, is convenient and easy to use, and has stable and reliable adjustment. Its performance can meet the usage requirements. Attached Figure Description

[0009] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0010] In the attached diagram:

[0011] Figure 1 This is a schematic diagram of the anti-detachment pin structure of this utility model;

[0012] Figure 2 This utility model Figure 1 A cross-sectional view of the center nut;

[0013] Figure 3 This utility model Figure 1 A schematic diagram of the rear view structure of the center nut;

[0014] Figure 4 This utility model Figure 1 A partial structural diagram;

[0015] Figure 5 This utility model Figure 4 Schematic diagram of local structure Figure 1 ;

[0016] Figure 6 This utility model Figure 4 Schematic diagram of local structure Figure 2 ;

[0017] In the diagram: 1. Pin body; 2. Restricting block; 3. Snap ring; 4. Inner groove; 5. Sliding through groove; 6. Threaded shaft; 7. Moving block; 8. Sliding block; 9. Slot; 10. Clamping plate; 11. Nut; 12. Round insert; 13. Groove; 14. Connecting pin; 15. Racket tooth; 16. Torsion spring; 17. One-way limiting helical tooth; 18. Pressing pin; 19. Adjusting groove; 20. I-beam pressing block; 21. Return spring. Detailed Implementation

[0018] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0019] Depend on Figures 1 to 6 The present invention includes a pin body 1, a limiting block 2 disposed at one end of the pin body 1, and a retaining spring 3 disposed on the surface of the pin body 1. The other end of the pin body 1 has an inner groove 4. The surface of the pin body 1 has two symmetrical sliding grooves 5 communicating with the inner grooves 4. The inner groove 4 is rotatably connected to a threaded shaft 6. The surface of the threaded shaft 6 is threadedly connected to a moving block 7. The surface of the moving block 7 is symmetrically fixedly installed with two sliding blocks 8. The two sliding blocks 8 are respectively located inside the two sliding grooves 5. The side of the two sliding blocks 8 away from the moving block 7 has a slot 9. The retaining spring 3 is symmetrically fixedly installed with two retaining plates 10. The two retaining plates 10 are respectively inserted into the two slots 9 to limit and fix the retaining spring 3.

[0020] This anti-detachment pin has an adjustment structure that can adjust the distance between the retaining spring and the limiting block, thus ensuring that the pin can stably and securely engage two parts during use. This prevents the parts from loosening and colliding, causing noise, and extends the service life of the parts. Simultaneously, this anti-detachment pin has a fastening structure that ensures the stability of the adjustment mechanism, preventing the pin from loosening or falling off. Furthermore, this anti-detachment pin has a simple design, is easy to use, and offers stable and reliable adjustment. Its performance meets the requirements of its application.

[0021] One end of the threaded shaft 6 extends to the other end of the pin body 1 and is fixedly installed with a nut 11. A round insert 12 located inside the inner groove 4 is fixedly installed on one side of the nut 11. A groove 13 is opened on the circumferential surface of the round insert 12. A connecting pin 14 is rotatably connected inside the groove 13. A ratchet 15 is fixedly connected to the surface of the connecting pin 14. Both ends of the connecting pin 14 are sleeved with torsion springs 16. The two ends of the two torsion springs 16 are fixedly connected to the groove 13 and the ratchet 15 respectively. A one-way limiting helical tooth 17 matching the ratchet 15 is fixedly installed at equal intervals in an arc shape on the side of the inner groove 4 near the round insert 12. The one-way limiting helical tooth 17 has the same function as the ratchet, so that the ratchet 15 can only be adjusted in one direction. This can effectively rotate the threaded shaft 6 in one direction and prevent the moving block 7 from becoming loose during use.

[0022] In use, the part is placed on the surface of the pin body 1, and then the snap ring 3 is placed on the surface of the pin body 1, so that the two snap plates 10 are inserted into the two slots 9. Then, the nut 11 is turned counterclockwise with a wrench. The rotation of the nut 11 will drive the round insert block 12 and the threaded shaft 6 to rotate. The rotation of the threaded shaft 6 will cause the moving block 7 to drive the two sliding blocks 8 to move towards the limiting block 2. The movement of the moving block 7 and the two sliding blocks 8 will drive the snap ring 3 to move through the two snap plates 10, so that the snap ring 3 moves towards the part, and finally it is fixed by the limiting block 2 and the snap ring 3.

[0023] The rotation of the nut 11 and the round insert 12 will cause the ratchet 15 to rotate. At the same time, the ratchet 15 will effectively engage with the one-way limiting helical tooth 17 through the torsion spring 16, so that the threaded shaft 6 can only rotate in one direction, thus ensuring the effectiveness of the retaining spring 3 in fixing the two parts.

[0024] A pressing pin 18 is fixedly installed in the middle of the ratchet 15. An adjustment groove 19 communicating with the groove 13 is opened on the surface of the nut 11. An I-shaped pressing block 20 is installed inside the adjustment groove 19. One end of the I-shaped pressing block 20 contacts the pressing pin 18, and the other end of the pressing pin 18 extends to the surface of the nut 11. A return spring 21 is sleeved in the middle of the I-shaped pressing block 20. The two ends of the return spring 21 are fixedly connected to the I-shaped pressing block 20 and the adjustment groove 19 respectively, so as to effectively adjust the looseness of the retaining ring 3.

[0025] By adjusting the adjustable wrench, the wrench is placed on the nut 11 and presses the I-shaped pressing block 20. The pressing block 20 stretches the return spring 21 and pushes the pressing pin 18, thereby causing the ratchet 15 to rotate and tighten the torsion spring 16. The rotation of the ratchet 15 will separate it from the one-way limiting helical tooth 17. At this time, the nut 11 can be rotated in the opposite direction. The reverse rotation can loosen and adjust the retaining spring 3, so that the retaining spring 3 can be aligned and fixed for parts of different sizes.

Claims

1. An anti-drop pin shaft, comprising a pin shaft body (1), a limiting block (2) arranged at one end of the pin shaft body (1), and a snap spring (3) arranged on the surface of the pin shaft body (1), characterized in that: Another end of the pin shaft body (1) is provided with an inner groove (4), the surface of the pin shaft body (1) is symmetrically provided with two sliding through grooves (5) communicated with the inner groove (4), the inner groove (4) is rotatably connected with a threaded shaft (6), the surface of the threaded shaft (6) is threadedly connected with a moving block (7), the surface of the moving block (7) is symmetrically fixedly installed with two sliding blocks (8), the two sliding blocks (8) are respectively located in the two sliding through grooves (5), the side, away from the moving block (7), of the two sliding blocks (8) is provided with an insertion groove (9), the inner part of the clamping spring (3) is symmetrically fixedly installed with a clamping plate (10), the two clamping plates (10) are respectively inserted into the two insertion grooves (9) to limit and fix the clamping spring (3).

2. A fall prevention pin shaft according to claim 1, characterized in that: One end of the threaded shaft (6) extends to the other end of the pin shaft body (1) and is fixedly installed with a nut (11), one side of the nut (11) is fixedly installed with a circular insertion block (12) located in the inner groove (4), the circumferential surface of the circular insertion block (12) is provided with a groove (13), the inner part of the groove (13) is rotatably connected with a connecting pin (14), the surface of the connecting pin (14) is fixedly connected with a ratchet (15), both ends of the connecting pin (14) are sleeved with a torsion spring (16), both ends of the two torsion springs (16) are respectively fixedly connected with the groove (13) and the ratchet (15).

3. A fall prevention pin shaft according to claim 2, characterized in that: The inner part of the inner groove (4) is fixedly installed with a one-way limiting bevel gear (17) matched with the ratchet (15) at arc intervals.

4. The anti-ejection pin shaft of claim 2, wherein: The middle part of the ratchet (15) is fixedly installed with a pressing pin (18), the surface of the nut (11) is provided with an adjusting groove (19) communicated with the groove (13), the inner part of the adjusting groove (19) is installed with an I-shaped pressing block (20), one end of the I-shaped pressing block (20) is in contact with the pressing pin (18), the other end of the pressing pin (18) extends to the surface of the nut (11), the middle part of the I-shaped pressing block (20) is sleeved with a return spring (21), both ends of the return spring (21) are respectively fixedly connected with the I-shaped pressing block (20) and the adjusting groove (19).

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