Pin puller

Abstract

The utility model relates to a pin puller which is used for pulling out an installed internal thread pin and comprises a connecting assembly and a sleeve part, the connecting assembly is provided with a threaded column, the threaded column is provided with an external thread, the external thread is matched with an internal thread on the internal thread pin, the connecting assembly is provided with a sliding rod part and two end parts arranged at the two ends of the sliding rod part, and the sleeve part is arranged on the sliding rod part. The sleeve part is slidably arranged on the sliding rod part, and the size of the inner diameter of the sleeve part is smaller than the size of the outer diameter of the end part. According to the pin puller, the threaded column on the connecting assembly is matched with the internal thread of the internal thread pin, stable connection between the pin puller and the internal thread pin is ensured, the sleeve part which is arranged in a sliding mode is combined, the sleeve part is moved to make the sleeve part collide with the end part, then the internal thread pin is pulled out, the internal thread pin is pulled out conveniently, efficiently and rapidly, and the working efficiency is improved. When a user applies external force, the sleeve part can smoothly slide along the sliding rod part, a large force application space is provided, and then uniform pulling-out force is applied to the internal threaded pin.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pin pullers, and particularly to a pin puller. BACKGROUND

[0002] In the process of mechanical assembly and maintenance, as a common fastener, internally threaded pins are widely used in various equipment and structures to connect or fix different components. However, in actual application, especially in the case of long-term use or due to environmental factors such as corrosion, rust, the disassembly of internally threaded pins often becomes extremely difficult. This not only increases the difficulty and time of maintenance, but also may cause damage to the threads due to forcible disassembly, thereby affecting the overall performance and safety of the equipment.

[0003] Traditional pin pulling methods, such as using a hammer, wrench or pliers to knock or twist, often have no space to apply the pulling force due to the tight connection of the pin, making it difficult to effectively pull out the tightly fitted internally threaded pin, and easily causing damage to the threads or surrounding components. SUMMARY

[0004] In view of the deficiencies of the prior art, the purpose of the present application is to provide a pin puller that can improve the efficiency of pulling out internally threaded pins.

[0005] The above-mentioned purpose of the present application is achieved by the following technical solutions:

[0006] A pin puller for pulling out an installed internally threaded pin, the pin puller comprising a connecting assembly and a sleeve part, the connecting assembly having a threaded column, an outer thread being formed on the threaded column, the outer thread being matched with an inner thread on the internally threaded pin, the connecting assembly having a slide rod part and two end parts arranged at both ends of the slide rod part, the sleeve part being slidably arranged on the slide rod part, the inner diameter of the sleeve part being smaller than the outer diameter of the end part.

[0007] The connecting assembly comprises a rod-shaped part and a bottom end part, a middle part of the rod-shaped part protruding to form one of the end parts, the rod-shaped part and the bottom end part being detachably connected, the bottom end part being connected to the rod-shaped part, the bottom end part forming another end part, the rod-shaped part between the two end parts being columnar to form the slide rod part.

[0008] The rod-shaped part and the bottom end part are threadedly connected.

[0009] The connecting assembly further comprises a threaded connection part, the threaded connection part comprising the threaded column and a fixed end, the fixed end being connected to the rod-shaped part.

[0010] The connecting assembly further comprises a connecting cap, the connecting cap is in the form of a cover, a through hole is formed in the connecting cap, the connecting cap is connected to the rod-shaped part, the size of the through hole is smaller than the size of the fixed end, the threaded column penetrates through the through hole, and the fixed end abuts between the rod-shaped part and the connecting cap.

[0011] The connecting cap and the rod-shaped part are threadedly connected.

[0012] To sum up, the beneficial technical effects of the present application are as follows:

[0013] 1. The threaded column on the connecting assembly cooperates with the internal thread of the internal threaded pin, ensuring the stable connection between the pin extractor and the internal threaded pin, and the sleeve part is slidably arranged, the internal threaded pin is extracted by moving the sleeve part and impacting the sleeve part and the end part, so that the internal threaded pin is conveniently, efficiently and quickly extracted, and the work efficiency is improved.

[0014] 2. When the user applies an external force, the sleeve part can smoothly slide along the slide rod part, and there is a larger force application space, so that the internal threaded pin is uniformly extracted. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 is a schematic view of a pin extractor.

[0016] Fig. 2 is a schematic view of a pin extractor explosion.

[0017] BRIEF DESCRIPTION OF DRAWINGS: 1, connecting assembly; 11, threaded connection part; 111, threaded column; 112, fixed end; 12, slide rod part; 13, connecting cap; 131, through hole; 121, end part; 122, rod-shaped part; 123, bottom end part; 2, sleeve part. DETAILED DESCRIPTION

[0018] The present application will be further described in detail below in combination with the drawings.

[0019] As shown in the drawings, a pin extractor is used to extract the installed internal threaded pin, and the pin extractor comprises a connecting assembly 1 and a sleeve part 2. Figs. 1-2 The connecting assembly 1 has a threaded column 111, an external thread is formed in the threaded column 111, the external thread cooperates with the internal thread on the internal threaded pin, the connecting assembly 1 has a slide rod part 12 and two end parts 121 arranged at both ends of the slide rod part 12, the sleeve part 2 is slidably arranged on the slide rod part 12, and the size of the inner diameter of the sleeve part 2 is smaller than the size of the outer diameter of the end part 121.

[0020] Specifically, the female threaded pin is a cylindrical pin with an internal threaded hole, and its structural feature is that a thread is cut inside the end 121 of the pin. This design allows the cylindrical pin to be pulled out by screwing it out, which facilitates disassembly.

[0021] Specifically, the connecting assembly 1 comprises a threaded column 111 with an external thread that matches the internal thread of the female threaded pin. One end of the threaded column 111 extends into a slide rod portion 12, and both ends of the slide rod portion 12 are provided with larger diameter end portions 121 for bearing impact force.

[0022] The sleeve portion 2 is a tubular structure with an inner diameter slightly smaller than the outer diameter of the end portions 121, allowing it to slide on the slide rod portion 12 but being blocked by the end portions 121.

[0023] The method of use is to screw the threaded column 111 of the pin puller into the female threaded pin to be pulled out until the connecting assembly 1 is firmly connected to the pin. The user holds the sleeve portion 2 and slides it along the slide rod portion 12 towards the end portion 121 opposite the pin, causing the sleeve portion 2 to impact the end portion 121. By rapidly and forcefully impacting the end portion 121 with the sleeve portion 2, the female threaded pin is pulled out using impact force.

[0024] Preferably, a spring or rubber cushion is added between the slide rod portion 12 and the sleeve portion 2 to reduce the shock during impact and protect the connecting assembly 1 and the sleeve portion 2 from damage.

[0025] Further, one end of the sleeve portion 2 is designed to be flat or with a handle, facilitating the user to apply force.

[0026] Specifically, the connecting assembly 1 comprises a rod-shaped portion 122 and a bottom end portion 123, the middle of the rod-shaped portion 122 protrudes to form an end portion 121, and the rod-shaped portion 122 and the bottom end portion 123 are detachably connected. The bottom end portion 123 is connected to the rod-shaped portion 122, and the bottom end portion 123 forms another end portion 121. The rod-shaped portion 122 between the two end portions 121 is cylindrical to form a slide rod portion 12. The rod-shaped portion 122 and the bottom end portion 123 are threadedly connected.

[0027] Specifically, the rod-shaped portion 122 is long and narrow, and the middle part protrudes outward to form a larger diameter end portion 121. One end of the rod-shaped portion 122 is designed with a thread for connecting with the bottom end portion 123. The bottom end portion 123 is a block structure, which is fixed on the rod-shaped portion 122 by thread connection to form another end portion 121. The part between the rod-shaped portion 122 and the bottom end portion 123 remains cylindrical to form a slide rod portion 12.

[0028] The sleeve portion 2 is a tubular structure with an inner diameter slightly smaller than the outer diameter of the two end portions 121, allowing it to freely slide on the slide rod portion 12 but being blocked by the end portions 121 to prevent it from falling off.

[0029] Further, one end of the sleeve part 2 is designed to be flat or with a handle, facilitating the user to apply force.

[0030] The connecting assembly 1 further comprises a threaded connecting part 11, which comprises a threaded column 111 and a fixed end 112, the fixed end 112 being connected with the rod-shaped part 122. The connecting assembly 1 further comprises a connecting cap 13, which is in the shape of a cover, and a through hole 131 is formed on the connecting cap 13. The connecting cap 13 is connected with the rod-shaped part 122, the size of the through hole 131 is smaller than that of the fixed end 112, the threaded column 111 penetrates through the through hole 131, and the fixed end 112 is located between the rod-shaped part 122 and the connecting cap 13. The connecting cap 13 and the rod-shaped part 122 are threadedly connected.

[0031] The threaded connecting part 11 is composed of the threaded column 111 and the fixed end 112. The threaded column 111 is used to connect with the internally threaded pin, and the end thereof is connected with the fixed end 112. The fixed end 112 is in the shape of a block or a ring, and is used to provide stable support.

[0032] The rod-shaped part 122 is in the shape of a long strip, one end of which is connected with the fixed end 112, and the middle part thereof is protruded to form the first end part 121. The rod-shaped part 122 is provided with external threads, which are used to connect with the connecting cap 13.

[0033] The connecting cap 13 is in the shape of a cover, and a through hole 131 is formed in the center thereof. The size of the through hole 131 is smaller than that of the fixed end 112, so as to ensure that the connecting cap 13 can be firmly fixed on the rod-shaped part 122, and at the same time, the threaded column 111 can penetrate through the through hole 131.

[0034] The rod-shaped part 122 and the connecting cap 13 are abutted against the fixed end 112 to form a stable connection. In use, the connecting cap 13 is screwed on the external threads of the rod-shaped part 122 until the edge of the through hole 131 of the connecting cap 13 is tightly abutted against the fixed end 112, thereby forming a stable connection structure.

[0035] The embodiments of the specific implementation are the preferred embodiments of the utility model, and are not limited to the protection scope of the utility model, so that: any equivalent changes made according to the structure, shape and principle of the utility model should be covered in the protection scope of the utility model.

Claims

1. A pin puller for pulling out internally threaded pins after installation, characterized in that, The assembly includes a connecting component (1) and a sleeve portion (2). The connecting component (1) has a threaded post (111) with an external thread that engages with the internal thread on the internal threaded pin. The connecting component (1) has a sliding rod portion (12) and two end portions (121) located at both ends of the sliding rod portion (12). The sleeve portion (2) is slidably disposed on the sliding rod portion (12), and the inner diameter of the sleeve portion (2) is smaller than the outer diameter of the end portions (121).

2. The pin puller according to claim 1, characterized in that, The connecting assembly (1) includes a rod-shaped portion (122) and a bottom end portion (123). The middle part of the rod-shaped portion (122) protrudes to form one end portion (121). The rod-shaped portion (122) and the bottom end portion (123) are detachably connected. The bottom end portion (123) is connected to the rod-shaped portion (122) and forms another end portion (121). The rod-shaped portion (122) between the two ends (121) is columnar to form the sliding rod portion (12).

3. The pin puller according to claim 2, characterized in that, The rod-shaped portion (122) and the bottom end portion (123) are threaded together.

4. The pin puller according to claim 2, characterized in that, The connecting assembly (1) further includes a threaded connection part (11), which includes the threaded post (111) and a fixed end (112), and the fixed end (112) is connected to the rod-shaped part (122).

5. The pin puller according to claim 4, characterized in that, The connecting assembly (1) further includes a connecting cap (13), which is cap-shaped and has a through hole (131). The connecting cap (13) is connected to the rod-shaped part (122). The size of the through hole (131) is smaller than the size of the fixed end (112). The threaded post (111) passes through the through hole (131), and the fixed end (112) abuts between the rod-shaped part (122) and the connecting cap (13).

6. The pin puller according to claim 5, characterized in that, The connecting cap (13) and the rod-shaped part (122) are threaded together.

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