A screw extractor tool

Abstract

The application relates to the field of screw dismounting, in particular to a screw taking-out tool which comprises a clamping block and a connecting column, one end of the connecting column is fixedly connected to the clamping block, the other end of the clamping block is used for extending into the hole of the screw, and the cross-sectional area of the clamping block decreases away from the connecting column along the length direction of the connecting column. The clamping block adopts a tapered design, the cross-sectional area gradually decreases along the axial direction, the clamping block can be smoothly inserted into the internal hexagonal hole or the broken wire hole of the slidable screw, the hole wall is tightly engaged, quick dismounting is realized through the mechanical wedging principle, the tool has the advantages of simple operation, high success rate, small damage to the base body and the like, and production efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of screw removal, and more particularly to a screw removal tool. Background Technology

[0002] In the manufacturing process, stripped threads on hex socket head cap screws and broken threads on pneumatic connectors are common mechanical assembly failures. These problems mainly stem from the following aspects: First, during assembly, operators may cause deformation and stripping of the hex socket head cap screw due to improper torque control (such as excessive torque when using pneumatic tools); second, metal fatigue, thread corrosion, or foreign object intrusion after long-term use can make disassembly difficult; third, some inexpensive connectors have quality problems such as insufficient material strength and poor machining precision.

[0003] When stripped threads or broken threads occur, removing the screw or connector can be time-consuming, especially in automated production lines or precision equipment maintenance scenarios. Such failures can cause the entire production line to shut down, resulting in economic losses of thousands to tens of thousands of yuan per hour and impacting production efficiency. Furthermore, repeated failed attempts may further damage the workpiece's base threads, increasing subsequent repair costs. Utility Model Content

[0004] To improve production efficiency, this application provides a screw removal tool.

[0005] The screw removal tool provided in this application adopts the following technical solution: A screw removal tool includes a snap-fit ​​block and a connecting post. The connecting post is fixedly connected to one end of the snap-fit ​​block, and the other end of the snap-fit ​​block is used to extend into the hole of the screw. Along the length of the connecting post, the cross-sectional area of ​​the snap-fit ​​block decreases as it moves away from the connecting post.

[0006] By adopting the above technical solution, the snap-fit ​​block adopts a tapered design, with the cross-sectional area gradually decreasing along the axial direction, so that it can be smoothly inserted into the internal hexagonal hole or broken thread hole of the stripped screw, and form a tight engagement with the hole wall. It achieves rapid disassembly through the mechanical wedge tightening principle, which has the advantages of simple operation, high success rate, and minimal damage to the base material, thereby improving production efficiency.

[0007] Preferably, the cross-section of the snap-fit ​​block is triangular.

[0008] By adopting the above technical solution, it is applicable to screws below M6. It utilizes the sharp angle effect to break through the oxide layer of small screws, making it easy to fit with the screw. The angular structure enhances the interlocking effect with the screw hole, improving disassembly efficiency and production efficiency.

[0009] Preferably, the cross-section of the snap-fit ​​block is quadrilateral.

[0010] By adopting the above technical solution, it is applicable to screws of M8 and above. By increasing the contact area, stress concentration in large screws is avoided, making it easier to fit with the screw. The angular structure enhances the engagement effect with the screw hole, improving disassembly efficiency and production efficiency.

[0011] Preferably, it also includes a clamp, and the connecting post is detachably connected to the clamp.

[0012] By adopting the above technical solution, the contact area between the chuck and the user is increased. By controlling the rotation of the chuck, it is easier to control the rotation of the snap-fit ​​block, thereby improving disassembly efficiency and production efficiency.

[0013] Preferably, one end of the chuck is provided with a threaded opening, and the connecting column is threadedly connected to the inner wall of the threaded opening.

[0014] By adopting the above technical solution, it is convenient to assemble the chuck and connecting post, and it is easy to replace the snap-fit ​​blocks of different specifications according to the size of the screw hole, which is suitable for disassembling screws of different specifications.

[0015] Preferably, the outer wall of the chuck is provided with a first anti-slip texture.

[0016] By adopting the above technical solution, the first anti-slip texture increases the friction with the hand, making it easier to control the assembly of the chuck and the connecting column, and improving assembly efficiency.

[0017] Preferably, it also includes a force-applying component, which is fixedly connected to the end of the clamp away from the connecting post.

[0018] By adopting the above technical solution, force is applied to the force-applying component, which facilitates the insertion of the snap-fit ​​block into the screw hole and engages with the hole wall, making it easy to disassemble the screw and improving production efficiency.

[0019] Preferably, the force-applying component includes a fixed column, a force-bearing block, a force-applying rod, and a force-applying block. The fixed column is fixedly connected to the end of the clamp away from the connecting column, and the fixed column and the connecting column are coaxially arranged. The force-bearing block is coaxially fixedly connected to the outer wall of the fixed column. The force-applying rod is detachably connected to the end of the fixed column away from the clamp. The force-applying block is disposed between the force-bearing block and the force-applying rod, and the force-applying block is slidably connected to the outer wall of the fixed column.

[0020] By adopting the above technical solution, the force-adding block slides back and forth to impact the force-bearing block, so that the locking block and the screw are relatively fixed. Rotating the force-adding rod makes it easy to drive the locking block to rotate, thus improving the disassembly efficiency.

[0021] Preferably, the outer wall of the force-adding block is provided with a second anti-slip texture.

[0022] By adopting the above technical solution, the second anti-slip texture increases the friction with the hand, making it easier to control the clamping block to slide along the fixed column.

[0023] Preferably, the fixing column is provided with an installation port, the axis of the installation port is perpendicular to the axis of the fixing column, the installation port penetrates the fixing column, and the force-adding rod is slidably connected to the inner wall of the installation port.

[0024] By adopting the above technical solution, it is easy to adjust the lever arm, and the rotation of the fixed column can be controlled by applying force to the lever, thereby improving the disassembly efficiency.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. The snap-fit ​​block adopts a tapered design, with the cross-sectional area gradually decreasing along the axial direction, so that it can be smoothly inserted into the internal hexagonal hole or broken thread hole of the stripped screw, and make a tight engagement with the hole wall. It achieves quick disassembly through the mechanical wedging principle, which has the advantages of simple operation, high success rate, and minimal damage to the base material, thereby improving production efficiency. 2. Easy to assemble the chuck and connecting post, and easy to replace the snap-fit ​​blocks of different specifications according to the size of the screw hole, suitable for disassembling screws of different specifications; 3. The force-adding block slides back and forth to impact the force-bearing block, so that the locking block and the screw are relatively fixed. Rotating the force-adding rod makes it easy to drive the locking block to rotate, thus improving disassembly efficiency. Attached Figure Description Figure 1 This is a schematic diagram of the overall structure of a screw removal tool.

[0026] Figure 2 This is a cross-sectional view of a screw removal tool.

[0027] Explanation of reference numerals in the attached drawings: 1. Snap-fit ​​block; 2. Connecting post; 3. Clamp; 31. Threaded opening; 32. First anti-slip texture; 4. Force-applying component; 41. Fixing post; 411. Mounting port; 42. Force-bearing block; 43. Force-applying rod; 431. Anti-ball detachment; 44. Force-applying block; 441. Sliding port; 442. Second anti-slip texture. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0029] This application discloses a screw removal fixture. (Refer to...) Figure 1 A screw removal tool includes a snap-fit ​​block 1, a connecting post 2, a chuck 3, and a force-applying component 4.

[0030] The connecting post 2 is fixedly connected to one end of the snap-fit ​​block 1. The other end of the snap-fit ​​block 1 is used to extend into the hole of the screw. Along the length of the connecting post 2, the cross-sectional area of ​​the snap-fit ​​block 1 decreases as it moves away from the connecting post 2. The cross-section of the snap-fit ​​block 1 can be triangular or quadrilateral. Triangular shapes are suitable for screws below M6, while quadrilateral shapes are suitable for screws above M8. The hardness of the material of the snap-fit ​​block 1 is greater than that of the screw material.

[0031] Reference Figure 1 and Figure 2 The connecting post 2 is detachably connected to the chuck 3. One end of the chuck 3 is coaxially provided with a threaded opening 31. The connecting post 2 is threadedly connected to the inner wall of the threaded opening 31. The outer wall of the chuck 3 is provided with a first anti-slip texture 32.

[0032] Reference Figure 1 The force-applying component 4 is fixedly connected to the end of the clamp 3 away from the connecting column 2. The force-applying component 4 includes a fixed column 41, a force-receiving block 42, a force-applying rod 43, and a force-applying block 44. The fixed column 41 is fixedly connected to the end of the clamp 3 away from the connecting column 2. The fixed column 41 is coaxially arranged with the connecting column 2. The force-receiving block 42 is coaxially fixedly connected to the outer wall of the fixed column 41. The diameter of the force-receiving block 42 is larger than the diameter of the fixed column 41.

[0033] Reference Figure 2 The fixed post 41 has an installation port 411 at the end away from the clamp 3. The axis of the installation port 411 is perpendicular to the axis of the fixed post 41. The installation port 411 passes through the fixed post 41. The force-adding rod 43 is slidably connected to the inner wall of the installation port 411. One end of the force-adding rod 43 is fixedly connected to an anti-detachment ball 431. The diameter of the anti-detachment ball 431 is larger than the diameter of the installation port 411. The force-adding block 44 is located between the force-receiving block 42 and the force-adding rod 43. The force-adding block 44 has a sliding port 441. The inner wall of the sliding port 441 is slidably connected to the outer wall of the fixed post 41. The force-adding block 44 is used to abut against the force-receiving block 42.

[0034] Reference Figure 1 The outer wall of the force-adding block 44 is provided with a second anti-slip texture 442.

[0035] The implementation principle of a screw removal fixture in this application embodiment is as follows: Select the snap-fit ​​block 1 according to the specifications of the screw hole, thread the connecting post 2 to the inner wall of the threaded opening 31 to complete the assembly with the chuck 3, slide the force-applying block 44 to impact the force-receiving block 42, so that the snap-fit ​​block 1 is clamped to the inner wall of the screw hole, the force-applying rod 43 passes through the mounting opening 411, and force is applied to the force-applying rod 43 to make the fixing post 41 rotate, and the snap-fit ​​block 1 drives the screw to rotate, thus completing the screw removal.

[0036] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A screw extraction tool, characterized by: It includes a snap-fit ​​block (1) and a connecting post (2). The connecting post (2) is fixedly connected to one end of the snap-fit ​​block (1). The other end of the snap-fit ​​block (1) is used to extend into the hole of the screw. Along the length direction of the connecting post (2), the cross-sectional area of ​​the snap-fit ​​block (1) decreases as it moves away from the connecting post (2).

2. A screw extraction kit according to claim 1, wherein: The cross-section of the snap-fit ​​block (1) is triangular.

3. A screw extractor tool as claimed in claim 1, wherein: The cross-section of the snap-fit ​​block (1) is quadrilateral.

4. A screw extraction kit according to claim 1, wherein: It also includes a clamp (3), and the connecting post (2) is detachably connected to the clamp (3).

5. A screw extractor as claimed in claim 4, wherein: One end of the clamp (3) is provided with a threaded opening (31), and the connecting column (2) is threaded to the inner wall of the threaded opening (31).

6. A screw extractor as claimed in claim 5, wherein: The outer wall of the chuck (3) is provided with a first anti-slip texture (32).

7. A screw extractor kit according to claim 4, wherein: It also includes a force-applying component (4), which is fixedly connected to the end of the clamp (3) away from the connecting column (2).

8. A screw extractor as claimed in claim 7, wherein: The force-applying component (4) includes a fixed column (41), a force-receiving block (42), a force-applying rod (43), and a force-applying block (44). The fixed column (41) is fixedly connected to the end of the clamp (3) away from the connecting column (2). The fixed column (41) and the connecting column (2) are coaxially arranged. The force-receiving block (42) is coaxially fixedly connected to the outer wall of the fixed column (41). The force-applying rod (43) is detachably connected to the end of the fixed column (41) away from the clamp (3). The force-applying block (44) is located between the force-receiving block (42) and the force-applying rod (43). The force-applying block (44) is slidably connected to the outer wall of the fixed column (41).

9. A screw extractor kit according to claim 8, wherein: The outer wall of the force-adding block (44) is provided with a second anti-slip texture (442).

10. A screw extraction kit according to claim 8, wherein: The fixed column (41) is provided with an installation port (411), the axis of the installation port (411) is perpendicular to the axis of the fixed column (41), the installation port (411) passes through the fixed column (41), and the force rod (43) is slidably connected to the inner wall of the installation port (411).

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