Fastener taking-out tool

Abstract

The utility model discloses a fastener taking-out tool, which belongs to the technical field of aeronautical manufacturing and maintenance and comprises a clamping part, a working section and a guide head which are of an integrated structure, the clamping part is in a quadrangular prism shape, the working section is in a quadrangular frustum pyramid shape which is shrunk towards the direction of the guide head, the guide head is a cone body, and grooves are formed in four edges of the working section. The cross section of the groove is quadrilateral, the edge line, connected with the edge line of the clamping part, in the contour line of the groove is a fastening edge, and the edge line, connected with the fastening edge, on the guide head is a cut-in edge. During use, a blind hole is formed in the head of the fastener, the fastener taking-out tool is vertically inserted into the blind hole and fixed tightly, the clamping part is rotated, the bolt is unscrewed, and after the fastener taking-out tool is taken down, the bolt is disassembled. According to the utility model, an integrated structure is adopted, the use is convenient, other structural parts or accessories can be prevented from being damaged, the processing mode is simple, the durability is strong, the cost is low, and the batch manufacturing is easy.

Description

Technical Field

[0001] This utility model belongs to the field of aviation manufacturing and maintenance technology, and relates to a fastener removal tool. Background Technology

[0002] During aircraft maintenance, a large number of fasteners, such as bolts and screws, need to be disassembled. Due to prolonged flight use and handling, some fasteners may exhibit rust, excessive head wear, or thread damage, making disassembly difficult. Currently, operators typically use pneumatic or electric tools with a flat chisel to perform this disassembly (e.g., Figure 1 However, this method of operation often results in the flat chisel slipping off the bolt head during impact, causing damage to surrounding structural components or accessories of the fastener and affecting the quality of product disassembly. Therefore, it is necessary to design a tool that can meet the disassembly requirements of fasteners with rust or thread damage, while ensuring disassembly efficiency. Utility Model Content

[0003] This utility model provides a fastener removal tool that ensures that operators will not damage surrounding products when disassembling rusted or thread-damaged fasteners, thereby improving work efficiency while ensuring the quality of the disassembly operation.

[0004] The present invention adopts the following technical solution:

[0005] A fastener removal tool includes a clamping part, a working section, and a guide head, which are integrally formed. The clamping part and the guide head are located at both ends of the fastener removal tool, and the working section is located in the middle.

[0006] The clamping part is a quadrangular prism, the working section is a quadrangular frustum that shrinks towards the guide head, and the guide head is a cone. Grooves are made at the four edges of the working section. The four grooves are identical in shape and extend from the junction of the working section and the guide head to the junction of the working section and the clamping part. The cross-section of the groove is quadrilateral. The edge line of the groove that connects with the edge line of the clamping part is the fastening edge, and the edge line that connects with the fastening edge on the guide head is the cutting edge.

[0007] Furthermore, the angle between the four planes on the outer surface of the working section and the extended plane of the outer surface of the connected clamping part is 3° to 4°.

[0008] Furthermore, the angle α between the projection line of the fastening rib on the axial section of the fastener removal tool and the projection of the clamping portion contour is 45°; the angle β between the projection line of the cutting rib on the axial section of the fastener removal tool and the projection of the clamping portion contour is 30° to 35°.

[0009] When using the tool, first drill a blind hole in the head of the bolt. No drilling is required for the socket head cap screw. Align the guide head of the fastener removal tool with the hole in the head of the fastener. Insert the fastener removal tool perpendicular to the plane of the hole into the hole. Use a hammer or other tools to tap the clamping part to fix the fastening rib or cutting rib of the working section to the head of the fastener. Rotate the clamping part to loosen the fastener. After removing the fastener removal tool, use pliers to clamp the head of the fastener and disassemble the fastener.

[0010] The beneficial effects of this utility model are:

[0011] (1) This utility model adopts an integrated structure, which is convenient to use. During use, it can prevent tools such as flat chisels from slipping off the heads of bolts or screws and causing damage to other structural parts or accessories.

[0012] (2) The processing method of this utility model is simple, durable, low cost and easy to mass-produce. Attached Figure Description

[0013] Figure 1 This is a schematic diagram illustrating the method of disassembling a head-damaged fastener using a flat chisel.

[0014] Figure 2 An isometric drawing of a fastener removal tool.

[0015] Figure 3 This is a schematic diagram of a fastening rib in the main view of a fastener removal tool, where α is the angle between the projection line of the fastening rib on the axial section of the fastener removal tool and the projection of the contour of the clamping part.

[0016] Figure 4 This is a schematic diagram of the cutting edge in the main view of a fastener removal tool, where β is the angle between the projection line of the cutting edge on the axial section of the fastener removal tool and the projection of the contour of the clamping part.

[0017] Figure 5 Left view of a fastener removal tool.

[0018] Figure 6 Right view of a fastener removal tool.

[0019] Figure 7 This is a schematic diagram illustrating the use of a fastener removal tool.

[0020] Wherein: 1-clamping part; 2-working section; 3-guide head; 4-groove; 5-fastening rib; 6-cutting rib. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in detail below.

[0022] A fastener removal tool includes a clamping part 1, a working section 2, and a guide head 3, which are integrally formed. The clamping part 1 and the guide head 3 are located at both ends of the fastener removal tool, and the working section 2 is located in the middle. Figure 2 , Figure 5 and Figure 6 .

[0023] The clamping part 1 is a quadrangular prism, the working section 2 is a quadrangular frustum shape that shrinks towards the guide head 3, the guide head 3 is a cone, and the angle between the four planes on the outer surface of the working section 2 and the extended plane of the outer surface of the clamping part 1 is 3° to 4°, which is 3° in this embodiment; grooves 4 are made at the four edges of the working section 2, the four grooves 4 are the same shape and all extend from the junction of the working section 2 and the guide head 3 to the junction of the working section 2 and the clamping part 1, the cross-section of the groove 4 is quadrilateral, the edge line of the groove 4 that connects with the edge line of the clamping part 1 is the fastening rib 5, and the edge line that connects with the fastening rib 5 on the guide head 3 is the cutting rib 6; the angle α between the projection line of the fastening rib 5 on the axis of the fastener removal tool and the projection of the outline of the clamping part 1 is 45°, such as Figure 3 The angle β between the projection line of the cutting edge 6 onto the axial section of the fastener removal tool and the contour projection of the clamping part 1 is 30° to 35°, and in this embodiment it is 30°. Figure 4 .

[0024] like Figure 7 When using it, first drill a blind hole in the bolt head, align the guide head 3 of the fastener removal tool with the blind hole and insert it into the hole perpendicular to the plane where the blind hole is located, and tap the clamping part 1 with a hammer to fix the fastening rib 5 or cutting rib 6 of the working section 2 to the bolt head. Rotate the clamping part 1 to loosen the bolt, remove the fastener removal tool, and then clamp the bolt head with pliers to disassemble the bolt.

Claims

1. A fastener removal tool, characterized in that, It includes a clamping part (1), a working section (2), and a guide head (3), which are integrated into one piece. The clamping part (1) and the guide head (3) are located at both ends of the fastener removal tool, and the working section (2) is located in the middle. The clamping part (1) is a quadrangular prism, the working section (2) is a quadrangular frustum that shrinks in the direction of the guide head (3), and the guide head (3) is a cone. The four edges of the working section (2) are all grooved (4). The four grooves (4) are the same shape and extend from the junction of the working section (2) and the guide head (3) to the junction of the working section (2) and the clamping part (1). The cross-section of the groove (4) is quadrilateral. The edge line of the groove (4) that connects with the edge line of the clamping part (1) is the fastening edge (5), and the edge line that connects with the fastening edge (5) on the guide head (3) is the cutting edge (6).

2. The fastener removal tool according to claim 1, characterized in that, The angle between the four planes on the outer surface of the working section (2) and the extended plane of the outer surface of the clamping part (1) is 3° to 4°.

3. The fastener removal tool according to claim 1, characterized in that, The angle α between the projection line of the fastening rib (5) on the axis of the fastener removal tool and the outline projection of the clamping part (1) is 45°; the angle β between the projection line of the cutting rib (6) on the axis of the fastener removal tool and the outline projection of the clamping part (1) is 30° to 35°.

Images