Interference stud mounting tool

Abstract

The utility model relates to an interference stud installation tool. The interference stud installation tool comprises a hollow sleeve. One end of the sleeve is in threaded connection with a top cover, an elastic piece and a top block are sequentially arranged in the sleeve from one end to the other end of the hexagonal head screw, and threads are arranged on the inner wall of the other end of the sleeve. Self-locking force of hard connection of the hexagon nut is converted into flexible pressing force of the spring, and the problems that parts are damaged and the service life is short due to hard connection self-locking are effectively solved. And meanwhile, force is automatically applied through the compression spring, and the problem that the stud cannot be driven to rotate due to overlarge torque or undersmall torque of a manual locking nut is solved.

Description

TECHNICAL FIELD

[0001] The application pertains to the technical field of interference studs, and particularly relates to an interference stud installation tool. BACKGROUND

[0002] During the assembly of an aero-engine, interference studs are widely used. The structure of a stud is significantly different from that of a bolt or a screw. It has no head, but is provided with threads at both ends. The threads at both ends can be of equal diameter or of different diameters. One end of the stud is usually screwed into a base body, and can be firmly embedded in the base body without disassembly due to the design of the transition fit threads; and the other end is used in cooperation with a nut for facilitating repeated disassembly and assembly.

[0003] The existing installation method is to install two hexagonal nuts on the standard threaded end of the interference stud and tighten them to lock each other, to drive the stud downward into the body as a whole by turning the upper hexagonal nut with a wrench, since the lower nut is locked. After installation, the two hexagonal nuts are loosened by two wrenches, and the stud is pulled out of the body. Figure 1 .

[0004] Defects of the existing method:

[0005] 1. The two hexagonal nuts are locked and fastened to drive the stud to be screwed in, and the mating surfaces of the hexagonal nuts are prone to adhesion. The threads are easily damaged due to the excessive use of the nuts during installation.

[0006] 2. The corresponding standard hexagonal nut of the stud is relatively thin, and it is not easy to tighten and disassemble with two wrenches. It is not convenient to use a ratchet wrench, and the operation time is too long. CONTENT OF THE INVENTION

[0007] To solve the problems in the background art, the application aims to provide an interference stud installation tool. The tool comprises a hollow sleeve, a top cover threadedly connected to one end of the sleeve, an elastic member and a top block arranged in the sleeve in sequence from the end of the top cover to the other end, and a thread provided on the inner wall of the other end of the sleeve.

[0008] Preferably, the top cover is a hexagonal head screw.

[0009] Preferably, the shape of the outer side of the connection between the sleeve and the hexagonal head screw matches the shape of the hexagonal head of the hexagonal head screw.

[0010] Preferably, the elastic member is a spring.

[0011] Preferably, the top block is a circular plate.

[0012] Preferably, the outer diameter of the spring is smaller than the diameter of the circular plate.

[0013] Preferably, the top block is in clearance fit with the inner wall of the sleeve.

[0014] In summary, the present application includes the following beneficial technical effects:

[0015] 1. The hard connection of the hexagonal nut is converted into the flexible compression force of the spring, effectively avoiding the damage of the hard connection self-locking and the short service life problem;

[0016] 2. The automatic force of the compression spring is avoided, and the problem of too large torque of the manual locking nut or too small torque to drive the pile to rotate is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a perspective view of the utility model;

[0018] Figure 2 is a structural schematic view of the utility model;

[0019] Figure 3 is a sectional view of the utility model.

[0020] BRIEF DESCRIPTION OF DRAWINGS

[0021] 1, sleeve; 2, top cover; 3, elastic piece; 4, top block. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0023] The technical solutions in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model. Figures 1-3 The utility model is further described in detail. The utility model embodiment discloses an interference pile mounting tool. Hollow sleeve 1, one end of sleeve 1 is threadedly connected with top cover 2. The sleeve 1 is sequentially provided with elastic piece 3 and top block 4 from one end of the top cover 2 to the other end in the sleeve 1, and the inner wall of the other end of the sleeve 1 is provided with threads. By threadedly connecting the target interference pile at the other end of the sleeve 1, using a wrench or other tools to twist the top cover 2, the sleeve 1 is rotated under the action of friction between the top cover 2 and the sleeve 1, or the sleeve 1 is rotated after the top cover 2 is tightened and fixed. The target interference bolt is pushed against the target interference bolt under the elastic force of the elastic piece 3, so that the target interference bolt cannot move in the direction of the top cover 2, so that the target interference bolt is in a fixed state relative to the sleeve 1, and the target interference bolt rotates with the sleeve 1.

[0024] Further, in the embodiment, the top cover 2 is a hexagonal head screw, specifically an external hexagonal head screw. In order to prevent damage caused by friction between the hexagonal head screw and the sleeve 1, the shape of the outer side surface of the connection between the sleeve 1 and the hexagonal head screw matches the shape of the hexagonal head of the hexagonal head screw. This can simultaneously rotate the hexagonal head screw and the sleeve 1 when using a wrench or the like, and improves the integrity of the top cover 2 and the sleeve 1.

[0025] Further, the elastic member 3 can be any component with elasticity. In the embodiment, the elastic member 3 is a spring.

[0026] Further, the top block 4 is used to buffer the impact force between the elastic member 3 and the target bolt, and can uniformly distribute the elastic force of the spring to the end of the target interference bolt. In the embodiment, the sleeve 1 has a threaded end connected to the target bolt, and thus has a cylindrical hollow region. In order to enable the top block 4 to abut against the cylindrical hollow region, the top block 4 is a circular plate. In order to enable the top block 4 to move freely in the sleeve 1, the top block 4 is in clearance fit with the inner wall of the sleeve 1.

[0027] Further, in order to prevent uneven force on the circular plate serving as the top block 4, and to prevent the circular plate from being reversed in the sleeve 1, the outer diameter of the spring is smaller than the diameter of the circular plate, so as to ensure the compression area and force balance.

[0028] Working principle: the hexagonal head screw serving as the top cover 2 is threadedly connected to the sleeve 1, and the hexagonal head of the hexagonal head screw is aligned with the hexagonal head of the sleeve 1. Then, the elastic member 3 and the top block 4 are sequentially loaded into the sleeve 1. After the end of the target interference bolt is loaded into a target tool or a target workpiece, the end of the sleeve 1 away from the top cover 2 is threadedly connected to the other end of the target interference bolt exposed outside. Then, a wrench or the like is used to rotate the top cover 2 and the sleeve 1, so that the sleeve 1 rotates and the axial force generated by the compression of the spring presses the target interference bolt, thereby preventing the target interference bolt from continuing to move into the sleeve 1, and thus the target interference bolt and the sleeve 1 are in a relatively fixed state. Then, the sleeve 1 is continuously rotated to drive the target interference bolt to rotate into the target workpiece. When the work task is completed, the top cover 2 is first removed to release the elastic force of the spring, and then the sleeve 1 is removed to separate the sleeve 1 from the target interference bolt.

[0029] The device embodiments described above are merely illustrative, wherein the units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, which can be located in one place, or distributed on multiple network units. According to actual needs, part or all of the modules can be selected to achieve the purpose of the embodiment.

[0030] In this application, unless otherwise clearly specified and limited, the terms "mounting", "setting", "connecting", "fixing", "screwing" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited, those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] It can be understood that those skilled in the art can make equivalent replacements or changes according to the technical solutions of the present application and the concepts of the present application, and all these changes or replacements shall belong to the protection scope of the claims attached to the present application.

Claims

1. An interference pile installation tool, characterised in that, The utility model relates to a hollow sleeve (1), one end of sleeve (1) is connected with top cover (2), the sleeve (1) is equipped with elastic element (3) and top block (4) from the one end of top cover (2) to the other end in proper order in, the inner wall of the other end of sleeve (1) is equipped with thread.

2. The over-pinch post installation tool of claim 1, wherein, The top cover (2) is a hexagonal head screw.

3. The over-pinch post installation tool of claim 2, wherein, The shape of the outer side of the connection between the sleeve (1) and the top cover (2) matches the shape of the hexagonal head of the hexagonal head screw.

4. The over-pinch post installation tool of claim 1, wherein, The elastic element (3) is a spring.

5. The over-pinch post installation tool of claim 4, wherein, The top block (4) is a round plate.

6. The over-pinch post installation tool of claim 5, wherein, The outer diameter of the spring is smaller than the diameter of the round plate.

7. The over-pinch post installation tool of claim 1, wherein, The top block (4) is clearance fit with the inner wall of the sleeve (1).

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