Bushing press-fitting tool capable of guaranteeing concentricity of parts

Abstract

The utility model relates to the field of machining, in particular to a bush press-fitting tool capable of guaranteeing part concentricity, which comprises a joint part and a bush matched with the joint part for press fitting. The guide mandrel comprises a rod part and a head part, the rod part penetrates through the bushing, the head part abuts against the bushing, and the rod part of the guide mandrel penetrates through a press-fitting hole in the joint part; the traction assembly drags and guides the mandrel to move in the axial direction of the press-fitting hole to press the bush into the press-fitting hole. According to the utility model, an effective solution can be provided for directly pressing the bushing by using a press, accurate positioning and quick clamping of parts can be ensured, the requirements on concentricity and location degree of the bushing are effectively ensured, in addition, the structure is simple, the clamping is convenient, the processing process is simplified, the processing cost of mass-produced parts is saved, and the qualification rate of the parts is improved.

Description

Technical Field

[0001] The utility model relates to the field of mechanical processing, in particular to a bushing press-fitting tool for ensuring the concentricity of parts. Background Art

[0002] In the field of mechanical manufacturing and processing, assembly benchwork is the main type of work in machining assembly, and press-fitting bushings is one of the most common and critical operations. However, some parts are limited in position during assembly, and the form and position tolerances are high. During assembly, it is impossible to use a press to directly press the bushing into the part hole. For example, there are joint parts with position and concentricity requirements in aviation structural parts. When assembly benchwork presses bushings for such parts, due to the limitations of the part structure, it is impossible to directly use a press to press the bushings. Utility Model Content

[0003] The utility model aims to solve the problem that some joint-type press-fit parts with position and concentricity requirements in the background technology are difficult to be press-fitted using a press machine, and proposes a bushing press-fitting tool for ensuring the concentricity of the parts.

[0004] The technical solution of the utility model is: a bushing press-fitting tool for ensuring the concentricity of parts, including a joint part and a bushing pressed together with the joint part; and also includes:

[0005] The guide mandrel comprises a stem and a head, wherein the stem passes through the bushing and the head abuts against the bushing, and the stem of the guide mandrel passes through the press-fit hole on the joint part;

[0006] And a traction assembly, which traction guides the core shaft to move axially along the press-fitting hole to press the bushing into the press-fitting hole.

[0007] Preferably, the traction assembly includes an inner guide sleeve that fits on the guide core shaft rod, an outer guide sleeve that fits on the inner guide sleeve, and a press-fit nut that fits on the guide core shaft rod; a thread that fits on the press-fit nut is provided on the outer peripheral wall of the guide core shaft rod near the free end, one end of the outer guide sleeve is in contact with the press-fit nut, and the other end of the outer guide sleeve is in contact with the joint part.

[0008] Preferably, during the press-fitting process of the inner guide sleeve, the outer peripheral wall is in cooperative contact with the inner peripheral wall of the press-fitting hole.

[0009] Preferably, during the press-fitting process, the inner guide sleeve enters from one side of the press-fitting hole, and when the press-fitting is completed, the inner guide sleeve moves out from the other side of the press-fitting hole.

[0010] Preferably, in the axial direction of the guide core shaft, the length of the thread is less than the sum of the lengths of the press-fit nut and the outer guide sleeve.

[0011] Compared with the prior art, the utility model has the following beneficial technical effects: it can provide an effective solution for bushings that cannot be directly pressed on by a press machine, and can ensure accurate positioning and quick clamping of parts, effectively ensuring the concentricity and position requirements of the bushing. In addition, it has a simple structure and is easy to clamp, which simplifies the processing process, saves the processing cost of batch production parts, and improves the part qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of an embodiment of the utility model;

[0013] Figure 2 It is a structural schematic diagram before the bushing is pressed;

[0014] Figure 3 It is a schematic diagram of the structure after the bushing is pressed;

[0015] Figure 4 for Figure 1 A is an enlarged schematic diagram.

[0016] Figure numerals: 1. guide core shaft; 2. inner guide sleeve; 3. outer guide sleeve; 4. press-fit nut; 5. bushing; 6. joint part. DETAILED DESCRIPTION

[0017] like Figure 1-Figure 4 As shown, the utility model proposes a bushing press-fitting tool for ensuring the concentricity of parts, including a joint part 6 and a bushing 5 press-fitted with the joint part 6. Specifically, the joint part 6 is provided with a press-fitting hole, and the bushing 5 is press-fitted into the press-fitting hole; it also includes a guide mandrel 1 and a traction assembly;

[0018] The guide mandrel 1 comprises a stem and a head, the stem passes through the bushing 5, the head abuts against the bushing 5, and the stem of the guide mandrel 1 passes through the press-fitting hole on the joint part 6;

[0019] And a traction assembly, which traction guides the mandrel 1 to move axially along the press-fit hole to press the bushing 5 into the press-fit hole.

[0020] Further, the traction assembly includes an inner guide sleeve 2 that fits on the rod of the guide mandrel 1, an outer guide sleeve 3 that fits on the inner guide sleeve 2, and a press-fit nut 4 that fits on the rod of the guide mandrel 1; a thread that fits with the press-fit nut 4 is provided on the outer peripheral wall of the rod of the guide mandrel 1 near the free end, one end of the outer guide sleeve 3 contacts the press-fit nut 4, and the other end of the outer guide sleeve 3 contacts the joint part 6. During the press-fitting process of the inner guide sleeve 2, the outer peripheral wall contacts with the inner peripheral wall of the press-fitting hole, and in the axial direction of the guide mandrel 1, the length of the thread is less than the sum of the lengths of the press-fitting nut 4 and the outer guide sleeve 3. During the press-fitting process, the inner guide sleeve 2 enters from one side of the press-fitting hole, and when the press-fitting is completed, the inner guide sleeve 2 moves out from the other side of the press-fitting hole.

[0021] In the utility model, the bushing 5 and the inner guide sleeve 2 are sequentially strung on the guide core shaft 1, and after being strung, the guide core shaft 1 is inserted into the press-fitting hole of the joint part 6, and the inner guide sleeve 2 is used for centering to ensure concentricity, and then the outer guide sleeve 3 is inserted into the extended inner guide sleeve 2 to ensure concentricity, and then the press-fitting nut 4 is spun to drive the guide core shaft 1 to move axially along the press-fitting hole to press the bushing 5 into the press-fitting hole of the joint part 6. The bushing 5 is spun to the bottom, and after the press-fitting is completed, the press-fitting nut 4 is loosened, and the guide core shaft 1, the inner guide sleeve 2, and the outer guide sleeve 3 are taken out to complete the final assembly. It can provide an effective solution for the bushing 5 that cannot be directly press-fitted by a press machine, and can ensure accurate positioning, fast clamping of parts, and effectively ensure the concentricity and position requirements of the bushing 5. In addition, it has a simple structure and is convenient to clamp, which simplifies the processing process, saves the processing cost of batch parts, and improves the qualified rate of parts.

[0022] The implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A bushing press-fitting tool for ensuring the concentricity of parts, comprising a joint part (6) and a bushing (5) press-fitted with the joint part (6); characterized in that: Also includes: The guide mandrel (1) comprises a stem and a head, the stem passes through the bushing (5), the head abuts against the bushing (5), and the stem of the guide mandrel (1) passes through a press-fit hole on a joint part (6); And a traction assembly, which traction guides the core shaft (1) to move axially along the press-fitting hole to press the bushing (5) into the press-fitting hole.

2. The bushing press-fitting tool for ensuring the concentricity of parts according to claim 1 is characterized in that: The traction assembly comprises an inner guide sleeve (2) fitted on the rod of a guide core shaft (1), an outer guide sleeve (3) fitted on the inner guide sleeve (2), and a press-fit nut (4) fitted on the rod of the guide core shaft (1); a thread fitted with the press-fit nut (4) is arranged on the outer peripheral wall of the rod of the guide core shaft (1) near the free end; one end of the outer guide sleeve (3) contacts the press-fit nut (4), and the other end of the outer guide sleeve (3) contacts the joint part (6).

3. The bushing press-fitting tool for ensuring the concentricity of parts according to claim 2 is characterized in that: During the press-fitting process of the inner guide sleeve (2), the outer peripheral wall is in cooperative contact with the inner peripheral wall of the press-fitting hole.

4. The bushing press-fitting tool for ensuring the concentricity of parts according to claim 3 is characterized in that: During the press-fitting process, the inner guide sleeve (2) enters from one side of the press-fitting hole, and when the press-fitting is completed, the inner guide sleeve (2) moves out from the other side of the press-fitting hole.

5. The bushing press-fitting tool for ensuring the concentricity of parts according to claim 3 is characterized in that: In the axial direction of the guide core shaft (1), the length of the thread is less than the sum of the lengths of the press-fit nut (4) and the outer guide sleeve (3).

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