Auxiliary disassembling tool for screw
By designing a screw-assisted disassembly tool, which uses a disassembly sleeve and a clamping component to synchronously rotate and clamp the screw, the problem of screws falling off after disassembly is solved, enabling single-handed operation and efficient screw removal, and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DALIAN CHANGFENG IND CORP
- Filing Date
- 2025-05-29
- Publication Date
- 2026-05-22
AI Technical Summary
During aircraft maintenance, screws are prone to falling off after disassembly, causing operational difficulties and affecting maintenance quality. Existing methods cannot effectively fix screws, especially in confined spaces where single-handed operation is limited.
A screw-assisted disassembly tool was designed, including a disassembly sleeve and a clamping component. The disassembly sleeve is fitted onto the disassembly blade and rotates synchronously with it. The clamping component holds the screw through a screw gripper, thereby achieving synchronous rotation and removal of the screw.
It enables immediate removal of screws after disassembly, preventing them from falling out, thus improving operational efficiency. The structure is simple, easy to operate, and low in cost, making it suitable for mass production.
Smart Images
Figure CN224266033U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of aviation manufacturing and maintenance technology, and relates to a screw-assisted disassembly tool. Background Technology
[0002] During aircraft maintenance, screws frequently need to be removed. Typically, when disassembling screws, it's crucial to hold them firmly by hand as they are removed from the fasteners; otherwise, they may fall into the aircraft interior after disassembly, making retrieval time-consuming and laborious. Due to the confined space inside an aircraft, operators have limited access in certain areas, making it difficult to use both hands simultaneously. Current methods rely solely on visually locating scattered screws, with no better alternative. Therefore, a tool is needed to secure screws during disassembly, preventing them from falling into the aircraft and jeopardizing maintenance quality. Utility Model Content
[0003] This utility model provides a screw-assisted disassembly tool, which facilitates the removal of fastening screws by operators, ensures that the screws can be removed immediately after disassembly, prevents them from falling, and requires only one hand to operate. It is small in size and light in weight, and does not affect the efficiency of the operator in disassembling screws.
[0004] The present invention adopts the following technical solution:
[0005] A screw-assisted disassembly tool includes a disassembly sleeve and a clamping component.
[0006] The cutting tool sleeve is a hollow cylinder with a triangular prism-shaped facet inside. The apex of the triangle on the transverse section of the facet is fixed to the inner wall of the cylinder, and the center of the triangle on the transverse section of the facet is concentric with the circle on the transverse section of the cylinder. The cutting tool sleeve is used to fit over the cutting tool body, and the triangular prism-shaped facet can be tightly fitted over the cutting tool body, so that the cutting tool sleeve can rotate synchronously with the cutting tool.
[0007] The lower part of the clamping component is a ring for mounting on the top of the cutting tool sleeve, and the upper part has two symmetrically arranged screw grippers. The screw grippers are triangular in shape with their vertices facing each other and are used to clamp the studs of the screws. The clamping surfaces of the screw grippers that contact the screws are arc-shaped. The bottoms of the two screw grippers are fixedly connected to the outer circle of the top surface of the lower ring of the clamping component.
[0008] Furthermore, the screw-assisted disassembly tool is made of a plastic material that can be moderately deformed.
[0009] Furthermore, the transverse cross-section of the inner vertical surface of the cutting tool sleeve is an equilateral triangle, and the ratio of the diameter b of its inscribed circle to the diameter a of the outer circle of the cutting tool body is 9:10.
[0010] Furthermore, the included angle α between the two screw grippers of the clamping component and the clamping surfaces that contact the screw is between 85° and 100°.
[0011] Furthermore, in its natural state, the ratio of the distance c between the intersection of the two clamping surfaces and the top surface of the unscrew sleeve to the maximum distance d between the two clamping surfaces is 1:1.
[0012] In use, first, place the screw-assisted disassembly tool onto the blade of the disassembly knife, push the blade head until it protrudes from the top surface of the disassembly knife sleeve, and then, using the elasticity of the screw grippers, slide the screw from the side between the two screw grippers, so that the screw thread is clamped between the clamping surfaces of the two screw grippers. Insert the blade head into the screw head and rotate the disassembly knife. Since the diameter of the inscribed circle of the internal vertical surface of the disassembly knife sleeve is smaller than the diameter of the disassembly knife, the screw-assisted disassembly tool rotates synchronously with the disassembly knife while the disassembly knife is rotating. The clamping surfaces always maintain the clamping state on the screw. Therefore, after the screw is disassembled, the screw grippers can directly remove the screw.
[0013] The beneficial effects of this utility model are:
[0014] (1) This utility model has a simple structure and is easy to operate. It can remove the screw directly while disassembling the screw, thus improving work efficiency.
[0015] (2) The processing method of this utility model is simple and the precision requirement is not high. Since the precision requirement is not high, it can be processed by injection molding, which is low in cost and easy to mass-produce. Attached Figure Description
[0016] Figure 1 This is an isometric drawing of the tool sleeve.
[0017] Figure 2 This is an isometric view of the clamping component.
[0018] Figure 3 This is a front view of a screw-assisted disassembly tool.
[0019] Figure 4 This is a left view of a screw-assisted disassembly tool.
[0020] Figure 5 This is a bottom view of a screw-assisted disassembly tool, where α is the included angle between the clamping surfaces, c is the distance between the intersection of the two clamping surfaces and the top surface of the disassembly sleeve, and d is the maximum distance between the two clamping surfaces.
[0021] Figure 6 This is a back view of a screw-assisted disassembly tool, where b is the diameter of the inscribed circle of the transverse cross section of the inner elevation of the disassembly tool sleeve.
[0022] Figure 7This is an isometric view of a screw-assisted disassembly tool.
[0023] Figure 8 This is a schematic diagram of a screw-assisted disassembly tool, where 'a' is the outer diameter of the screwdriver blade.
[0024] Figure 9 This is a schematic diagram of the assembly of a tool for disassembling a screwdriver and a bolt.
[0025] Figure 10 This is a schematic diagram of a screw removal tool after a screw has been removed.
[0026] Wherein: 1-Disassembly sleeve; 2-Clamping component; 3-Screw gripper. Detailed Implementation
[0027] The following description, in conjunction with the embodiments and accompanying drawings, further explains the specific implementation of this utility model, but is not intended to limit this utility model.
[0028] A screw-assisted disassembly tool includes a screw-disassembly sleeve 1 and a clamping component 2, made of a moderately deformable plastic material, such as... Figure 7 As shown.
[0029] like Figure 1 , Figure 3 and Figure 4 The cutting tool sleeve 1 is a hollow cylinder with a triangular prism-shaped facet inside. The triangle in the transverse cross-section of the facet is an equilateral triangle, with its vertices fixed to the inner wall of the cylinder. The center of the triangle in the transverse cross-section is concentric with the transverse cross-section circle of the cylinder. The cutting tool sleeve 1 is used to fit over the cutting tool body. The ratio of the diameter b of the inscribed circle of the transverse cross-section triangle to the diameter a of the outer circle of the cutting tool body is 9:10. Figure 6 This allows the vertical surface to be tightly fitted onto the cutter body, thereby enabling the cutter sleeve 1 to rotate synchronously with the cutter.
[0030] like Figure 2 The lower part of the clamping component 2 is a ring, used for mounting on the top of the unscrew sleeve 1. The upper part consists of two symmetrically arranged screw grippers 3, which are roughly triangular in shape. Their bottoms are fixedly connected to the outer circle of the top surface of the lower ring of the clamping component 2, with the vertices of the triangles facing each other. They are used to clamp the studs of screws. The included angle α of the clamping surfaces is between 85° and 100°. In this embodiment, α is 90°. The clamping surface of the screw gripper 3 that contacts the screw is arc-shaped. In its natural state, the ratio of the distance c between the intersection of the two clamping surfaces and the top surface of the unscrew sleeve 1 to the maximum distance d between the two clamping surfaces is 1:1. Figure 5 .
[0031] When using it, first put the screw-assisted disassembly tool onto the blade of the disassembly knife, such as... Figure 8Push the cutting head of the cutting tool until it exposes the top surface of the cutting tool sleeve 1, as follows. Figure 9 Then, utilizing the elasticity of the screw gripper 3, the screw is inserted from the side between the two screw grippers 3, so that the screw shaft is clamped between the clamping surfaces of the two screw grippers 3. The disassembly cutter head is then inserted into the screw head, and the disassembly cutter is rotated. Because the diameter of the inscribed circle of the inner vertical surface of the disassembly cutter sleeve 1 is smaller than the diameter of the disassembly cutter, the screw auxiliary disassembly tool rotates synchronously with the disassembly cutter while the disassembly cutter is rotating. The clamping surfaces always maintain the clamping state on the screw. Therefore, after the screw is disassembled, the screw gripper 3 can directly remove the screw. Figure 10 .
[0032] In summary, the above are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.
Claims
1. A screw-assisted disassembly tool, characterized in that, It includes a cutting sleeve (1) and a clamping component (2); The cutting tool sleeve (1) is a hollow cylinder with a triangular prism-shaped vertical surface inside. The apex of the triangle in the horizontal section of the vertical surface is fixed to the inner wall of the cylinder. The center of the triangle in the horizontal section of the vertical surface is concentric with the circle in the horizontal section of the cylinder. The cutting tool sleeve (1) is used to fit around the cutting tool body, and the triangular prism-shaped vertical surface can fit tightly around the cutting tool body, so that the cutting tool sleeve (1) can rotate synchronously with the cutting tool. The lower part of the clamping component (2) is a ring for mounting on the top of the knife sleeve (1), and the upper part is two symmetrically arranged screw grippers (3). The screw grippers (3) are triangular in shape with their vertices facing each other and are used to clamp the studs of the screws. The clamping surface of the screw grippers (3) that contacts the screw is an arc surface. The bottom of the two screw grippers (3) is fixedly connected to the outer circle of the top surface of the lower ring of the clamping component (2).
2. The screw-assisted disassembly tool according to claim 1, characterized in that, The screw-assisted disassembly tool is made of a plastic material that can be moderately deformed.
3. The screw-assisted disassembly tool according to claim 1, characterized in that, The transverse cross section of the inner vertical surface of the cutting sleeve (1) is an equilateral triangle, and the ratio of the diameter b of its inscribed circle to the diameter a of the outer circle of the cutting blade is 9:
10.
4. The screw-assisted disassembly tool according to claim 1, characterized in that, The included angle α of the clamping surface of the screw gripper (3) is between 85° and 100°.
5. A screw-assisted disassembly tool according to claim 1, characterized in that, In its natural state, the ratio of the distance c between the intersection of the two clamping surfaces of the screw gripper (3) and the top surface of the unscrew sleeve (1) to the maximum distance d between the two clamping surfaces is 1:1.