Nut dismounting tool

Abstract

The utility model relates to bolt auxiliary dismounting tool technical field, more particularly to a nut dismounting tool. Including ratchet head A, ratchet head B, sleeve and connecting rod. The square joint center distance of ratchet head A, ratchet head B is equidistant with the center distance of helicopter main hub elastic bearing fixed bolt, and ratchet head A, ratchet head B have ratchet function, and can be adjusted to different angles in positive and negative directions. The utility model utilizes the structural features of the adjacent two fixed bolts of the helicopter main hub elastic bearing, and when the fixed bolt is disassembled, the sleeve is adjusted to the angle by the ratchet function, and the adjacent bolt is used as the fulcrum to fix the force by using the fixed nut dismounting auxiliary tool, so that one person can independently complete the dismounting work of the elastic bearing fixed bolt, the problem that the bolt direction is not matched with the dismounting tool during dismounting is improved, the dismounting work is convenient and fast, and time and effort are saved.

Description

Technical Field

[0001] This utility model relates to the technical field of bolt-assisted assembly and disassembly tools, and more specifically, to a nut assembly and disassembly tool. Background Technology

[0002] Because the main rotor hub elastic bearing fixing bolt has a particularly large torque, during daily disassembly and maintenance, it is often difficult to remove the elastic bearing fixing bolt. In this case, a two-person operation is often adopted, that is, one person fixes one end of the bolt and the other person uses a special torque wrench to remove the nut. Due to the limited operating space, the two people will affect each other during the operation, which greatly reduces the work efficiency.

[0003] The current solution to this problem is to design a special tool for removing and installing fixing bolts to disassemble the fixing bolts of the helicopter main rotor hub elastic bearing. However, the tool angle cannot be adjusted during use. When the bolt angle and the tool angle are inconsistent, two people still need to work together to disassemble and install the fixing nut. Therefore, it is urgent to improve the tool to improve work efficiency and quality. Summary of the Invention

[0004] To overcome the above shortcomings, this utility model provides a nut removal and installation tool, which aims to improve the problem of inconsistency between the fixing bolt angle and the removal and installation auxiliary tool angle encountered during the use of current tools, thereby saving manpower and improving work efficiency.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A nut removal and installation tool includes a ratchet head A, a ratchet head B, a sleeve, and a connecting rod.

[0007] Ratchet head A includes a quick-change shaft, a quick-change shaft spring, a reversing shaft, a reversing shaft spring, a pin, a pawl, a toothed frame, a steel ball, a square connector, and a leaf spring; ratchet head B includes a quick-change shaft, a quick-change shaft spring, a reversing shaft, a reversing shaft spring, a pin, a pawl, a toothed frame, a steel ball, a square connector, and a leaf spring. Ratchet heads A and B are connected by a connecting rod. The center distance between the square connectors of ratchet heads A and B is equidistant from the center distance between the fixing bolts of the helicopter main rotor hub elastic bearing. A matching sleeve is mounted on the square connector. In ratchet heads A and B, the toothed frame is fixed to the square connector by the leaf spring. A steel ball is embedded in the lower end of the square connector. The quick-change shaft is embedded inside the square connector. The top of the pin is embedded in the quick-change shaft and passes through the center of the pawl. The reversing shaft is located inside the quick-change shaft, and a quick-change shaft spring is embedded inside the reversing shaft. The quick-change shaft and the pawl are fixed in contact with each other through the reversing shaft.

[0008] Both ratchet head A and ratchet head B have ratchet functions and can be rotated in both directions to adjust different angles.

[0009] This utility model adopts the above solution and has the following benefits:

[0010] Based on the characteristic that the two fixing bolts of the elastic bearing are adjacent, the center distance between ratchet heads A and B is equal to the center distance between the two fixing bolts of the elastic bearing. When disassembling and assembling the fixing bolts, the adjacent fixing bolts are used as fulcrums for fixing and force, so that a single person can independently complete the disassembly and assembly of the fixing nut, saving time and effort and improving work efficiency.

[0011] This utility model discloses a nut assembly and disassembly tool with a ratchet function, which can adjust the sleeve angle by rotating in both directions according to the angle of the bolt fixed by the elastic bearing, thereby improving the adaptability of the auxiliary tool for nut assembly and disassembly.

[0012] The sleeve of this utility model can be replaced as needed, extending its service life and greatly improving the tool adaptability of the disassembly and assembly auxiliary tooling. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 for Figure 1 A partial sectional view.

[0015] Figure 3 for Figure 1 A partial sectional view.

[0016] In the diagram, A is ratchet head A, B is ratchet head B, 1 is quick-change shaft, 2 is reversing shaft, 3 is reversing shaft spring, 4 is pin, 5 is quick-change shaft spring, 6 is pawl, 7 is toothed frame, 8 is leaf spring, 9 is square connector, 10 is steel ball, 11 is sleeve, and 12 is connecting rod. Detailed Implementation

[0017] To clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0018] like Figures 1 to 2As shown, a nut removal and installation tool includes a ratchet head A (A), a ratchet head B (B), a connecting rod (12), and a sleeve (11). Both ratchet heads A (A) and B (B) include a quick-change shaft (1), a quick-change shaft spring (5), a reversing shaft (2), a reversing shaft spring (3), a pin (4), a pawl (6), a toothed frame (7), a steel ball (10), a square connector (9), a leaf spring (8), and a connecting rod (12). The toothed frame (7) is fixed to the square connector (9) by the leaf spring (8). A steel ball (10) is embedded in the lower end of the square connector (9). The quick-change shaft (1) is embedded in the square connector (9). The top of the pin (4) is embedded in the quick-change shaft (1) and passes through the center of the ratchet (6). The reversing shaft (2) is located inside the quick-change shaft (1). The quick-change shaft spring (3) is embedded inside the reversing shaft (2). The quick-change shaft (1) and the pawl (6) are fixed to each other by the reversing shaft (2).

[0019] The center distance between the square joints (9) of the ratchet head A (A) and ratchet head B (B) is equal to the center distance between the two fixing bolts of the helicopter main rotor hub elastic bearing, and the square joint (9) is equipped with a sleeve (11).

[0020] Both ratchet heads A (A) and B (B) have ratchet functions and can rotate in both directions. They can be adjusted to different angles. Rotating the quick-change shaft (1) clockwise or counterclockwise drives the pin (4) to adjust the deflection angle of the pawl (6), so that one side of the pawl (6) is in close contact with the reversing shaft (2). Under the influence of the spring force of the reversing shaft spring (5) inside the reversing shaft (2), the rotation direction of ratchet head A and ratchet head B can be switched. Pressing the quick-change shaft (1) causes the groove at the lower end of the quick-change shaft (1) to move down, so that the steel ball (10) on the square connector (9) is embedded in the groove, and the sleeve (11) can be quickly replaced.

[0021] When disassembling and assembling the fixing nut of the elastic bearing, according to the characteristic that the two fixing bolts of the elastic bearing are adjacent, the sleeve (11) is adjusted to a suitable angle, and the fixing nut disassembly and assembly auxiliary tool is put on the two adjacent bolts. The target nut is disassembled and assembled by using the adjacent fixing bolts as leverage. A single person can complete the disassembly and assembly of the fixing nut, saving manpower.

[0022] The above specific embodiments should not be construed as limiting the scope of protection of this utility model.

[0023] For those skilled in the art, any alternative improvements or modifications made to the embodiments of this utility model shall fall under the category of

[0024] Within the protection scope of this utility model.

[0025] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. A nut removal and installation tool, characterized in that: The system includes ratchet head A and ratchet head B. Both ratchet head A and ratchet head B include a quick-change shaft, a quick-change shaft spring, a reversing shaft, a reversing shaft spring, a pin, a ratchet, a gear frame, a steel ball, a square connector, and a leaf spring. The ratchet head A and ratchet head B are connected by a connecting rod. The spacing between the square connectors of ratchet head A and ratchet head B is equidistant from the center distance of the fixing bolts of the helicopter main rotor hub elastic bearing. The square connector is equipped with a sleeve.

2. The nut removal and installation tool according to claim 1, characterized in that: Ratchet head A and ratchet head B have ratchet functions and can be rotated in both directions to adjust different angles.

3. The nut removal and installation tool according to claim 1, characterized in that: The sleeve specifications can be changed as needed.

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