Compact positioning pin fixing structure

Abstract

The utility model discloses a compact positioning pin fixing structure, which comprises a pin seat, a positioning pin and a side fixing screw, and is characterized in that the pin seat is trumpet-shaped and has a narrow upper part and a wide lower part, the center of the pin seat is provided with a mounting hole for accommodating the positioning pin, and the inner wall of the mounting hole is provided with a guide structure matched with the outer surface of the positioning pin; a threaded hole communicated with the mounting hole is formed in the side wall of the pin seat, and the side fixing screw penetrates through the threaded hole and abuts against the positioning pin so that the positioning pin can be fixed. By adopting a side fixing screw fixing mode, a flange structure is not needed, the overall size is greatly reduced, and the space is saved; the pin seat is simple in structure, easy to process and manufacture and low in material cost; the positioning pin can be fixed only through one side fixing screw, and the installation process is simple and rapid; the anti-rotation key groove is matched with the anti-rotation bulge, so that the positioning pin is effectively prevented from rotating in the use process, and the positioning precision and reliability are improved; the design of the annular groove at the bottom of the pin seat reduces the overall weight and is convenient to install.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical fixing technical field, concretely is a compact structure's positioning pin fixing structure. BACKGROUND

[0002] In the mechanical manufacturing and assembly process, the positioning pin is widely used to realize the accurate positioning between parts. The traditional positioning pin fixing mode usually adopts the flange structure, that is, the positioning pin is fixed on the sleeve with the flange, and then the flange is fixed on the base body through the bolt. The disadvantages of this structure are: 1. High cost: the manufacturing process of the flange sleeve is complex, and the material cost is high. 2. Large space occupation: the flange structure increases the overall volume, which is not conducive to the miniaturization design of the equipment. 3. Low installation efficiency: multiple bolts are needed for fixing, and the installation process is time-consuming.

[0003] Therefore, a compact structure, low cost, space-saving and convenient positioning pin fixing structure is needed to solve the above problems in the prior art. UTILITY MODEL CONTENT

[0004] The utility model discloses a compact structure positioning pin fixing structure, which has the advantages of low cost, small space occupation and convenient installation.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A compact structure positioning pin fixing structure, comprising a pin seat, a positioning pin and a side fixing screw, characterized in that:

[0007] The pin seat is trumpet-shaped, narrow at the top and wide at the bottom, and the center is provided with a mounting hole for accommodating the positioning pin, and the inner wall of the mounting hole is provided with a guide structure matched with the outer surface of the positioning pin.

[0008] The side wall of the pin seat is provided with a threaded hole communicated with the mounting hole, and the side fixing screw passes through the threaded hole and abuts against the positioning pin to fix the positioning pin.

[0009] Further, at least one anti-rotation key groove is arranged on the outer surface of the positioning pin along the axial direction.

[0010] Further, the inner wall of the mounting hole of the pin seat is provided with an anti-rotation protrusion corresponding to the position of the anti-rotation key groove of the positioning pin, and the anti-rotation protrusion is matched with the anti-rotation key groove to prevent the positioning pin from rotating during use.

[0011] Further, an annular groove is arranged at the bottom of the pin seat to reduce the weight and facilitate the application of adhesive.

[0012] Compared with the prior art, the utility model has the advantages of:

[0013] Adopt the side fixed screw fixed mode, do not need the flange structure, greatly reduce the overall volume, save the space, the pin seat structure is simple, easy to process and manufacture, the material cost is lower, only need a side fixed screw can realize the fixation of the positioning pin, the installation process is simple and fast, through the cooperation of the anti-rotation key groove and the anti-rotation convex, the rotation of the positioning pin in the use process is effectively prevented, the positioning precision and reliability are improved, the annular groove design of the pin seat bottom reduces the overall weight and facilitates installation. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the cross-sectional structure schematic view of the utility model;

[0015] Figure 2 It is the plan view of the utility model;

[0016] Figure 3 It is the bottom view of the utility model;

[0017] Figure 4 It is the cross-sectional view of the pin seat in the utility model.

[0018] In the drawing: 1, pin seat; 2, positioning pin; 3, side fixed screw; 4, mounting hole; 5, threaded hole; 6, anti-rotation key groove; 7, anti-rotation convex; 8, annular groove. DETAILED DESCRIPTION

[0019] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, some technical features known in the art are not described to avoid obscuring the utility model.

[0020] The applicant designs a compact positioning pin fixing structure as shown in Figures 1-4 , which comprises a pin seat 1, a positioning pin 2 and a side fixed screw 3. The pin seat 1 is trumpet-shaped, narrow at the top and wide at the bottom, and a mounting hole 4 for accommodating the positioning pin 2 is arranged in the center. The side wall of the pin seat 1 is provided with a threaded hole 5 communicating with the mounting hole 4, and the side fixed screw 3 passes through the threaded hole 5 and abuts against the positioning pin 2 to fix the positioning pin 2.

[0021] In order to prevent the positioning pin 2 from rotating in the use process, as shown in Figure 3 , at least one anti-rotation key groove 6 is arranged on the outer surface of the positioning pin 2 along the axial direction. The inner wall of the mounting hole 4 of the pin seat 1 is provided with an anti-rotation convex 7 corresponding to the position of the anti-rotation key groove 6 of the positioning pin 2, and the anti-rotation convex 7 cooperates with the anti-rotation key groove 6.

[0022] In order to reduce the weight of the pin seat 1 and facilitate the application of the adhesive, the bottom of the pin seat 1 is provided with an annular groove 8.

[0023] During installation, the positioning pin 2 is inserted into the mounting hole 4 of the pin seat 1, and the anti-rotation key groove 6 of the positioning pin 2 is aligned with the anti-rotation protrusion 7 of the pin seat 1. Then, the side fixing screw 3 is tightened to press the side fixing screw 3 against the positioning pin 2, thereby fixing the positioning pin 2 in the pin seat 1. Due to the cooperation of the anti-rotation key groove 6 and the anti-rotation protrusion 7, the rotation of the positioning pin 2 during use can be effectively prevented. Finally, the pin seat 1 is fixed on the base body through the adhesive.

[0024] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A compact positioning pin fixing structure, comprising a pin seat (1), a positioning pin (2) and a side fixing screw (3), characterized in that: the pin seat (1) is trumpet-shaped, narrow at the top and wide at the bottom, and has a mounting hole (4) in the center for accommodating the positioning pin (2), and the inner wall of the mounting hole (4) is provided with a guide structure matched with the outer surface of the positioning pin (2); the side wall of the pin seat (1) is provided with a threaded hole (5) in communication with the mounting hole (4), and the side fixing screw (3) passes through the threaded hole (5) and abuts against the positioning pin (2) to fix the positioning pin (2).

2. A compactly configured dowel pin fixture according to claim 1, wherein, The outer surface of the positioning pin (2) is provided with at least one anti-rotation key groove (6) in the axial direction.

3. A compactly configured dowel pin fixture according to claim 2, wherein, The inner wall of the mounting hole (4) is provided with an anti-rotation protrusion (7) corresponding to the position of the anti-rotation key groove (6) of the positioning pin (2), and the anti-rotation protrusion (7) is matched with the anti-rotation key groove (6) to prevent the positioning pin (2) from rotating during use.

4. The compact dowel pin fixture of claim 1, wherein, The bottom of the pin seat (1) is provided with an annular groove (8).

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