Disassembling and assembling tool for shaft interference part

Abstract

The utility model discloses a shaft interference part dismounting tool which comprises a first clamping tool, a second clamping tool, a threaded rod, a gasket and a cushion block, the second clamping tool is arranged on the outer surface of a shaft interference part in a sleeved mode and clamps a protruding flange face of the shaft interference part, and the first clamping tool and the second clamping tool are fixedly connected through a bolt. The shaft interference component is arranged on the outer surface of the shaft in a sleeving mode, the end of the shaft is of a hollow structure, a cushion block is arranged in the hollow structure, a threaded hole is formed in the center of the first clamping tool, the threaded rod penetrates through the threaded hole to be screwed into the hollow structure of the end of the shaft, and a gasket is arranged between the second clamping tool and the shaft interference component. The device is simple in structure and convenient to adjust, does not need special mechanical equipment, can be operated manually, and greatly reduces the disassembly and assembly cost. And through isolation protection of the gasket and the cushion block, abrasion to the shaft is small. In the disassembly and assembly process, concentricity of the tool and the shaft can be guaranteed all the time, and abrasion of the shaft and a shaft interference part is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of machinery, and in particular relates to a disassembly and assembly tool for a shaft interference component. Background Art

[0002] As an indispensable part of turbine power, the shaft usually needs to be interference fit with other parts in order to achieve the designed imbalance. During the turbine operation test, the shaft interference fit parts need to be disassembled and assembled. At present, the turbine power industry mostly uses multiple threaded rods to directly pull the shaft interference fit parts to disassemble and assemble the shaft interference fit parts. As described in patent CN213060008U, a limit plate, a pull plate and a threaded rod are used to tighten and fix the disassembly tool to the shaft, and then a hydraulic jack is used for disassembly. The shaft interference fit disassembly and assembly of this method has the following defects:

[0003] 1. There are size requirements for hydraulic jacks, and their maximum outer diameter must not be larger than the outer diameter of the shaft.

[0004] 2. The axial friction between the shaft interference component and the shaft directly acts on the thread of the threaded rod. The larger the interference, the greater the axial force on the thread, which is very easy to damage the thread.

[0005] 3. The limit groove on the shaft also has high requirements. For some shaft interference parts with relatively thin thickness, the limit groove is also relatively shallow, resulting in a smaller contact area between the limit block and the limit groove. During the stretching process of the hydraulic jack, the limit block is prone to unhooking.

[0006] Therefore, it is necessary to design a disassembly and assembly tool for the shaft interference assembly with simple structure, low cost and strong applicability. Utility Model Content

[0007] In view of the above-mentioned problems, the utility model provides a disassembly and assembly tool for a shaft interference component which has a simple structure, is easy to operate, has a low cost and is easy to implement, so that the wear of the shaft interference component on the shaft is reduced as much as possible during the disassembly and assembly process.

[0008] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0009] A disassembly and assembly tool for a shaft interference component, comprising a first clamping tool, a second clamping tool, a threaded rod, a gasket and a cushion block. The second clamping tool is sleeved on the outer surface of the shaft interference component to clamp the protruding flange surface of the shaft interference component. The shaft interference component is sleeved on the outer surface of the shaft. The first clamping tool and the second clamping tool are fixedly connected by bolts. The end of the shaft is a hollow structure with a cushion block arranged inside the hollow structure. A threaded hole is arranged at the center of the first clamping tool. The threaded rod passes through the threaded hole and is screwed into the hollow structure of the end of the shaft. A gasket is arranged between the second clamping tool and the shaft interference component.

[0010] As a further technical solution, the second clamping tool includes two semicircular clamping components, and the two semicircular clamping components are fixed by bolts.

[0011] As a further technical solution, a through hole is provided at the center of the second clamping tool for the shaft interference fit part to pass through.

[0012] As a further technical solution, the threaded rod, the cushion block, the shaft interference component and the shaft are coaxially arranged.

[0013] As a further technical solution, one end of the threaded rod is an arc-shaped end, and the other end is provided with an external hexagonal shaft end; the threaded hole in the center of the first clamping tool has an internal thread, and the threaded rod has an external thread corresponding to the internal thread.

[0014] As a further technical solution, the cushion block is a cylindrical structure, one end of the cushion block is provided with a trumpet-shaped opening, and the other end is provided with a through hole, and the arc-shaped end of the threaded rod matches the trumpet-shaped opening of the cushion block.

[0015] As a further technical solution, the gasket includes a first ring piece and a second ring piece arranged perpendicularly to the first ring piece, the first ring piece is arranged between the second clamping fixture and the shaft interference component, and the second ring piece is arranged between the second clamping fixture and the protruding flange surface of the shaft interference component.

[0016] The technical solution of the utility model has the following beneficial effects:

[0017] (1) The disassembly and assembly tooling structure of the shaft interference fit parts is simple, does not require special mechanical equipment, and can be operated manually, which greatly reduces the disassembly and assembly costs.

[0018] (2) Structural adjustment is relatively easy. When the interference fit is large, the threaded rod can be appropriately enlarged to ensure sufficient thrust to disassemble and assemble the shaft and the interference fit parts.

[0019] (3) The isolation protection of the gasket and the block reduces the wear on the shaft. During the disassembly and assembly of the shaft interference parts, the concentricity of the tooling and the shaft can be ensured at all times, reducing the wear of the shaft and the shaft interference parts during the disassembly and assembly process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the disassembly and assembly tooling of the shaft interference component of the utility model;

[0021] Figure 2 It is a cross-sectional view of the disassembly and assembly tooling of the shaft interference component of the utility model;

[0022] Figure 3 This is a structural diagram of the first clamping tool of the utility model;

[0023] Figure 4 This is a cross-sectional view of the first clamping tool of the utility model;

[0024] Figure 5 This is the second supporting tooling structure diagram of the utility model;

[0025] Figure 6 This is a cross-sectional view of the second clamping tool of the utility model;

[0026] Figure 7 This is a schematic diagram of the threaded rod structure of the utility model;

[0027] Figure 8 This is a schematic diagram of the gasket structure of the utility model;

[0028] Fig. 9 This is a schematic diagram of the cushion block structure of the utility model;

[0029] Fig.10 This is a cross-sectional view of the cushion block of the utility model;

[0030] In the figure: 1, first clamping fixture; 2, second clamping fixture; 3, threaded rod; 31, arc-shaped end; 32, external hexagonal shaft end; 4, gasket; 41, first ring piece; 42, second ring piece; 5, cushion block; 51, trumpet-shaped opening; 52, through hole; 6, shaft interference component; 7, shaft. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0032] like Figures 1 to 10As shown, a disassembly and assembly tool of a shaft interference component of the utility model comprises a first clamping tool 1, a second clamping tool 2, a threaded rod 3, a gasket 4, and a cushion block 5; the second clamping tool 2 is sleeved on the outer surface of the shaft interference component 6 to clamp the protruding flange surface of the shaft interference component 6, the shaft interference component 6 is sleeved on the outer surface of the shaft 7, the first clamping tool 1 and the second clamping tool 2 are fixedly connected by bolts, the end of the shaft 7 is a hollow structure, and a cushion block 5 is arranged inside the hollow structure, the center of the first clamping tool 1 is provided with a threaded hole, the threaded rod 3 passes through the threaded hole and is screwed into the hollow structure at the end of the shaft 7, and the function of the threaded rod 3 is to push the shaft 7 out by tightening to achieve the purpose of disassembling the shaft interference component. A gasket 4 is arranged between the second clamping tool 2 and the shaft interference component 6, and the materials of the gasket 4 and the cushion block 5 can be metal or non-metal.

[0033] In the fixture, the second clamping fixture 2 is divided into two semicircular clamping assemblies on the left and right, which clamp the flange surface protruding from the shaft interference component 6. The two are separated by a gasket 4 to prevent damage to the shaft interference component 6 during disassembly and assembly. The two semicircular clamping assemblies are fixed by bolts; the first clamping fixture 1 and the second clamping fixture 2 are also connected and fixed by bolts, and this fixing surface may or may not fit; the threaded rod 3 is relatively long, one end of the threaded rod 3 is an arc-shaped end 31, and the other end is provided with an external hexagonal shaft end 32, which is convenient for tightening the threaded rod 3 with a wrench. The threaded rod 3 can be screwed with a manual wrench or a hydraulic wrench; the threaded hole in the center of the first clamping fixture 1 has an internal thread, and the threaded rod 3 has an external thread corresponding to the internal thread, which is convenient for thread transmission. When the interference is large, the threaded rod 3 can be appropriately enlarged to ensure that there is enough thrust to disassemble and assemble the shaft 7 and the shaft interference component 6.

[0034] A spacer block 5 is added between the threaded rod 3 and the hollow structure at the shaft end. When the threaded rod 3 is screwed, the axial thrust generated acts on the shaft 7 through the spacer block 5 to prevent the shaft end from being worn.

[0035] The gasket 4 includes a first ring piece 41 and a second ring piece 42 vertically arranged to the first ring piece 41 . The first ring piece 41 is arranged between the second clamping fixture 2 and the shaft interference component 6 , and the second ring piece 42 is arranged between the second clamping fixture 2 and the protruding flange surface of the shaft interference component 6 .

[0036] The cushion block 5 is a cylindrical structure, with a trumpet-shaped opening 51 at one end and a through hole 52 at the other end. The arc-shaped end 31 of the threaded rod 3 matches with the trumpet-shaped opening 51 of the cushion block 5 .

[0037] The threaded rod 3, the cushion block 5, the shaft interference component 6 and the shaft 7 of the utility model tool are coaxially arranged to reduce the wear of the shaft 7 and the shaft interference component 6 during the disassembly and assembly process.

[0038] The specific assembly process of the disassembly and assembly tool of the shaft interference component of the utility model is as follows: first, the shaft 7 is radially fixed to allow its axial movement. Then, the two semicircular clamping components of the second clamping tool 2 are combined together and then fixed together by bolts; the gasket 4 is placed in the second clamping tool 2, and then sleeved on the shaft interference component 6 together; the cushion block 5 is placed in the hollow structure of the shaft end; the second clamping tool 2 and the first clamping tool 1 are fixed together by bolts; the threaded rod 3 is screwed into the middle threaded hole of the first clamping tool 1 by a wrench until the threaded rod 3 contacts the cushion block 5; the threaded rod 3 is continued to be screwed to transmit the force acting on the cushion block 5 to the shaft 7, pushing the shaft 7 to move axially until the shaft 7 and the shaft interference component 6 are completely disassembled.

[0039] The utility model adopts a gasket 4 to isolate the second clamping tool 2 and the shaft interference component 6 to prevent the shaft interference component 6 from being worn; and a cushion block 5 to isolate the threaded rod 3 and the shaft 7 to prevent the shaft 7 from being worn.

[0040] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A disassembly and assembly tool for a shaft interference component, characterized in that: The invention comprises a first clamping fixture (1), a second clamping fixture (2), a threaded rod (3), a gasket (4) and a cushion block (5); the second clamping fixture (2) is sleeved on the outer surface of the shaft interference component (6) to clamp the protruding flange surface of the shaft interference component (6); the shaft interference component (6) is sleeved on the outer surface of the shaft (7); the first clamping fixture (1) and the second clamping fixture (2) are fixedly connected by bolts; the end of the shaft (7) is a hollow structure, and the cushion block (5) is arranged inside the hollow structure; a threaded hole is arranged at the center of the first clamping fixture (1); the threaded rod (3) passes through the threaded hole and is screwed into the hollow structure at the end of the shaft (7); and a gasket (4) is arranged between the second clamping fixture (2) and the shaft interference component (6).

2. The disassembly and assembly tool of the shaft interference component according to claim 1, characterized in that: The second clamping tool (2) comprises two semicircular clamping assemblies, and the two semicircular clamping assemblies are fixedly connected by bolts.

3. The disassembly and assembly tool of the shaft interference component according to claim 2, characterized in that: A through hole is provided at the center of the second clamping tool (2) for the shaft interference component (6) to pass through.

4. The disassembly and assembly tool of a shaft interference component according to claim 1, characterized in that: The threaded rod (3), the cushion block (5), the shaft interference component (6) and the shaft (7) are coaxially arranged.

5. The disassembly and assembly tool of the shaft interference component according to claim 1, characterized in that: One end of the threaded rod (3) is an arc-shaped end portion (31), and the other end is provided with an external hexagonal shaft end (32); the threaded hole in the center of the first clamping fixture (1) has an internal thread, and the threaded rod (3) has an external thread corresponding to the internal thread.

6. The disassembly and assembly tool for a shaft interference component according to claim 5, characterized in that: The cushion block (5) is a cylindrical structure, one end of the cushion block (5) is provided with a trumpet-shaped opening (51), and the other end is provided with a through hole (52), and the arc-shaped end portion (31) of the threaded rod (3) matches the trumpet-shaped opening (51) of the cushion block (5).

7. The disassembly and assembly tool for a shaft interference component according to claim 1, characterized in that: The gasket (4) comprises a first ring piece (41) and a second ring piece (42) arranged perpendicularly to the first ring piece (41), wherein the first ring piece (41) is arranged between the second clamping fixture (2) and the shaft interference component (6), and the second ring piece (42) is arranged between the second clamping fixture (2) and a protruding flange surface of the shaft interference component (6).

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