Pin puller

Abstract

The utility model relates to the technical field of pin pulling tools, and discloses a pin puller which comprises a pendulum bob, a first sliding groove is formed in the inner wall of the pendulum bob, a second sliding groove is formed in the inner wall of the pendulum bob, and an upper rod body is connected to the inner wall of the second sliding groove in a sliding mode. The pin puller is provided with the pendulum bob, the pendulum bob is matched with the upper rod body and the check block through the sliding grooves, so that the transmission of impact force is more efficient, the pin can be loosened more effectively, the operation is simple, the use is convenient, the connection mode of all the parts is simple, manufacturing and maintenance are easy, and the threaded connection mode of the lower rod body and the locking block is convenient. Corresponding locking blocks and screws can be conveniently replaced according to the sizes of the pins, the device can adapt to the pins of different sizes, the requirements of various use scenes are met, surface knurling treatment is carried out on the outer walls of the pendulum bob and the guide rod, friction force is increased, holding during operation is facilitated, the risk of slipping in the operation process is reduced, and the safety during use is improved.

Description

Technical Field

[0001] This utility model relates to the field of pin-pulling tools, specifically a pin-pulling device. Background Technology

[0002] In industrial production and machinery manufacturing, pins are often used to fix and connect multiple parts or templates. Pins are usually embedded in the template and are tightly fitted. When disassembly is required, the traditional method is to pull them out by knocking. However, for some larger and heavier templates, flipping and knocking is not practical. At the same time, the pins have threads on the inside, which can be pulled out by using a screw, but the large end of the screw is generally not suitable for knocking. This urgently requires a special device to solve this problem.

[0003] The pin puller was developed to address this issue. It converts kinetic energy into a force that drives the guide rod by striking the stop with a pendulum, thus loosening the pin through repeated impacts.

[0004] The prior art patent document CN221390854U provides a pin puller, which adds a locking ring to the pin puller rod and provides an upward or downward impact force to the pin pulling end of the pin puller rod. This not only pulls out the pin, but also installs the pin by striking the locking ring with a hammer, eliminating the process of striking with a copper rod and a hand hammer during the pin installation process.

[0005] The existing technology described above can remove the pin, but its structure is relatively complex and the operation is not convenient. It also has limited adaptability to pins of different sizes and cannot meet people's needs. Therefore, we need a pin puller. Utility Model Content

[0006] The purpose of this invention is to provide a pin puller to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a pin puller, including a pendulum, the inner wall of which has a first sliding groove and a second sliding groove, an upper rod body slidably connected to the inner wall of the second sliding groove, a guide rod fixedly connected to one end of the upper rod body, a lower rod body fixedly connected to one end of the guide rod, a bolt hole in the inner wall of the upper rod body, a stop block detachably connected to one end of the upper rod body, an installation groove in the inner wall of the stop block, a fixing bolt in the inner wall of the installation groove, an external thread in the outer wall of the lower rod body, a locking block threadedly connected to one end of the lower rod body, a threaded groove in the inner wall of the locking block, and a screw in the inner wall of the locking block.

[0008] Preferably, the pendulum is connected to the upper rod via a second groove to form a sliding structure, and one end of the upper rod extends through the second groove into the first groove to connect with the stop block.

[0009] Preferably, the pendulum forms a sliding structure with the stop block through the first sliding groove, and the outer wall of the stop block is in contact with the inner wall of the first sliding groove.

[0010] Preferably, the upper rod body is fixed to the stop block by a fixing bolt, and one end of the fixing bolt is threaded through the stop block and extends into the bolt hole for connection.

[0011] Preferably, the lower rod body forms a threaded structure with the locking block through an external thread, and one end of the lower rod body extends into the locking block for connection.

[0012] Preferably, the outer wall of the pendulum and the outer wall of the guide rod are subjected to surface knurling treatment.

[0013] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0014] This invention features a pendulum, which, through a sliding groove, engages with the upper rod and a stop block, making the transmission of impact force more efficient and effectively loosening the pin. It is simple to operate and easy to use. Furthermore, the simple connection method of each component facilitates manufacturing and maintenance. The threaded connection between the lower rod and the locking block allows for easy replacement of the corresponding locking block and screws according to different pin sizes, adapting to various pin dimensions and meeting the needs of diverse usage scenarios. The knurled surface treatment on the outer walls of the pendulum and guide rod increases friction, making it easier to grip during operation, reducing the risk of slippage, and improving safety during use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the pendulum and guide rod structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the pendulum and upper rod structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the lock block and screw structure of this utility model.

[0019] The components are: 1. Pendulum; 2. First slide groove; 3. Second slide groove; 4. Upper rod; 5. Guide rod; 6. Lower rod; 7. Bolt hole; 8. Stop block; 9. Mounting groove; 10. Fixing bolt; 11. External thread; 12. Locking block; 13. Threaded groove; 14. Screw. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figure 1-4 As shown, the pin puller includes a pendulum 1. The inner wall of the pendulum 1 has a first sliding groove 2 and a second sliding groove 3. The inner wall of the second sliding groove 3 is slidably connected to an upper rod 4. One end of the upper rod 4 is fixedly connected to a guide rod 5. One end of the guide rod 5 is fixedly connected to a lower rod 6. The inner wall of the upper rod 4 has a bolt hole 7. One end of the upper rod 4 is detachably connected to a stop block 8. The inner wall of the stop block 8 has an installation groove 9. The inner wall of the installation groove 9 is provided with a fixing bolt 10. The outer wall of the lower rod 6 has an external thread 11. One end of the lower rod 6 is threadedly connected to a locking block 12. The inner wall of the locking block 12 has a threaded groove 13. The inner wall of the locking block 12 is provided with a screw 14.

[0022] Through the above technical solution, by setting up a pendulum 1, which cooperates with the upper rod 4 and the stop block 8 through the sliding groove, the transmission of impact force is more efficient, and the pin can be loosened more effectively. The operation is simple and easy to use. Secondly, the connection method of each component is simple, easy to manufacture and maintain. The threaded connection between the lower rod 6 and the locking block 12 makes it convenient to replace the corresponding locking block 12 and screw 14 according to different pin sizes, which can adapt to different sizes of pins and meet the needs of various application scenarios.

[0023] Specifically, the pendulum 1 forms a sliding structure with the upper rod 4 through the second slide groove 3, and one end of the upper rod 4 passes through the second slide groove 3 and extends into the first slide groove 2 to connect with the stop block 8.

[0024] The above technical solution enhances the connection between the pendulum 1, the second slide groove 3, and the upper rod 4, making it easier for the upper rod 4 to move within the second slide groove 3 and thus making the upper rod 4 more stable during movement.

[0025] Specifically, the pendulum 1 forms a sliding structure with the stop block 8 through the first sliding groove 2, and the outer wall of the stop block 8 is in contact with the inner wall of the first sliding groove 2.

[0026] The above technical solution enhances the connection between the pendulum 1, the first slide groove 2, and the stop block 8, making it easier for the stop block 8 to move more smoothly and stably within the first slide groove 2 of the pendulum 1 when it moves.

[0027] Specifically, the upper rod body 4 is fixed to the stop block 8 by fixing bolt 10, and one end of the fixing bolt 10 is threaded through the stop block 8 and extends into the bolt hole 7 for connection.

[0028] The above technical solution enhances the connection between the upper rod 4, the fixing bolt 10, and the stop block 8. By using the fixing bolt 10, the stop block 8 can be well fixed on the upper rod 4, ensuring that the stop block 8 will not loosen or shift during the impact of the pendulum 1.

[0029] Specifically, the lower rod 6 is connected to the locking block 12 via external thread 11 to form a threaded structure, and one end of the lower rod 6 extends into the locking block 12 for connection.

[0030] The above technical solution enhances the connection between the lower rod body 6 and the locking block 12. When the locking block 12 is threaded onto the lower rod body 6, one end of the lower rod body 6 abuts against the screw 14, making the screw 14 more stable and preventing loosening or slippage between the lower rod body 6 and the locking block 12 when removing the pin. When faced with pins of different sizes, users can easily replace the corresponding locking block 12 and screw 14 according to their actual needs. Whether it is a pin in a small precision device or a pin in a large mechanical structure, a suitable combination of locking block 12 and screw 14 can be found for removal.

[0031] Specifically, the outer walls of the pendulum 1 and the guide rod 5 are knurled.

[0032] By applying the above technical solution to the surface knurling treatment on the outer walls of the pendulum 1 and guide rod 5, friction is increased, making it easier to grip during operation, reducing the risk of slipping during operation, and improving safety during use.

[0033] In use, first, select a suitable screw 14 according to the size of the pin and install it in the matching locking block 12. Thread the locking block 12 onto the lower rod body 6. Pass the upper rod body 4 through the second slide groove 3 of the pendulum 1 and extend it into the first slide groove 2 to connect with the stop block 8. Use the fixing bolt 10 to fix the stop block 8 onto the upper rod body 4. When it is necessary to remove the pin, connect and fix the screw 14 on the locking block 12 to the pin. Swing the pendulum 1 with external force. The pendulum 1 is limited by the second slide groove 3 and the first slide groove 2. Once set, the pendulum 1 slides along the upper rod 4 and the stop block 8, impacting the stop block 8. The force generated by the impact is transmitted through the upper rod 4 to the guide rod 5, then from the guide rod 5 to the lower rod 6, and finally from the lower rod 6 to the locking block 12. The force is then transmitted through the locking block 12 to the screw 14, ultimately reaching the pin. With each impact of the pendulum 1, the pin gradually loosens and is pulled out, thus completing the entire process. Any content not described in detail in this specification is prior art known to those skilled in the art.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. Pin extractor comprising a pendulum (1), characterized in that: The inner wall of the pendulum (1) is provided with a first sliding groove (2), and the inner wall of the pendulum (1) is provided with a second sliding groove (3), the inner wall of the second sliding groove (3) is slidably connected with an upper rod body (4), one end of the upper rod body (4) is fixedly connected with a guide rod (5), one end of the guide rod (5) is fixedly connected with a lower rod body (6), the inner wall of the upper rod body (4) is provided with a bolt hole (7), and one end of the upper rod body (4) is detachably connected with a stop block (8), the inner wall of the stop block (8) is provided with a mounting groove (9), and the inner wall of the mounting groove (9) is provided with a fixing bolt (10), the outer wall of the lower rod body (6) is provided with an external thread (11), and one end of the lower rod body (6) is threadedly connected with a lock block (12), the inner wall of the lock block (12) is provided with a threaded groove (13), and the inner wall of the lock block (12) is provided with a screw (14).

2. The pin extractor of claim 1, wherein: The pendulum (1) is connected with the upper rod body (4) through the second sliding groove (3), and one end of the upper rod body (4) extends into the first sliding groove (2) through the second sliding groove (3) and is connected with the stop block (8).

3. The pin extractor of claim 1, wherein: The pendulum (1) is connected with the stop block (8) through the first sliding groove (2), and the outer wall of the stop block (8) is fitted with the inner wall of the first sliding groove (2).

4. The pin extractor of claim 1, wherein: The upper rod body (4) is connected with the stop block (8) through the fixing bolt (10), and one end of the fixing bolt (10) extends into the bolt hole (7) through the stop block (8) and is connected.

5. The pin extractor of claim 1, wherein: The lower rod body (6) is connected with the lock block (12) through the external thread (11), and one end of the lower rod body (6) extends into the lock block (12) and is connected.

6. The pin extractor of claim 1, wherein: The outer wall of the pendulum (1) and the outer wall of the guide rod (5) are surface knurled.

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