Anti-falling positioning pin

Abstract

The utility model discloses an anti-falling positioning pin, and belongs to the technical field of positioning pins. The anti-falling positioning pin comprises a pin rod, a jacking block, an inner rod and a small positioning pin, a center hole is formed in the pin rod, the inner rod is movably sleeved with the center hole, a through hole communicated with the center hole is formed in the wall of the pin rod, the jacking block is movably installed in the through hole, sawteeth are arranged at the outer end of the jacking block, the inner end of the jacking block abuts against the inner rod, and the inner rod drives the jacking block to move. The small positioning pin is inserted into the center hole, and the lower end of the small positioning pin abuts against the upper end face of the inner rod. During use, the pin rod is inserted into the connecting hole; the through hole is formed in the pin rod, the jacking block is installed in the through hole, the inner rod can be driven to move by inserting the small positioning pin, so that the jacking block is driven to move outwards, the sawteeth at the outer end of the jacking block can abut against and be clamped with the inner wall of the connecting hole of the positioning pin, and therefore the connecting stability of the pin rod and the connecting hole is improved, falling is avoided, and the anti-falling purpose is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of positioning pins, and more specifically relates to an anti-falling positioning pin. Background Art

[0002] The locating pin is a part that is involved in limiting the freedom of an object. It has certain applications in some mechanical motion equipment and is mainly used to determine the position in two-dimensional space.

[0003] Traditional locating pins are composed of a bare pin rod and a pin cover. When in use, the pin rod is directly inserted into the through hole to achieve the purpose of connection. However, in actual use, when the bare pin rod is inserted into the connecting hole, it is very easy to slip, which will cause the locating pin to fall off and the connection to be unstable. Therefore, an anti-fall-off locating pin is proposed. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an anti-dropping positioning pin, which can achieve the purpose of preventing the positioning pin from slipping off.

[0005] The utility model discloses an anti-dropping positioning pin, comprising a pin rod, a tightening block, an inner rod and a small positioning pin; a center hole is arranged on the pin rod, the inner rod is movably sleeved in the center hole, a through hole communicating with the center hole is arranged on the pin rod wall, the tightening block is movably installed in the through hole, a sawtooth is arranged on the outer end of the tightening block, the inner end of the tightening block abuts against the inner rod, and the inner rod drives the tightening block to move; the small positioning pin is inserted into the center hole, and the lower end of the small positioning pin abuts against the upper end surface of the inner rod.

[0006] As a further improvement of the utility model, a top groove is arranged on the outer wall of the inner rod, and the inner end of the top tightening block is inserted into the top groove and abuts against the inner wall of the top groove.

[0007] As a further improvement of the utility model, the inner wall of the top groove is a conical surface.

[0008] As a further improvement of the present invention, the number of the through holes is at least 4, and they are evenly arranged on the pin rod along the circumference of the pin rod.

[0009] As a further improvement of the utility model, an adhesive tape is wrapped around the outside of the through hole.

[0010] Compared with the prior art, the advantages of the present invention are:

[0011] When the utility model is in use, the pin rod is inserted into the connecting hole; a through hole is arranged on the pin rod, and a tightening block is installed in the through hole, and the inner rod can be driven to move by inserting a small positioning pin, thereby driving the tightening block to move outward, and the serrations at the outer end of the tightening block can be abutted and clamped with the inner wall of the connecting hole of the positioning pin, thereby increasing the connection stability of the pin rod and the connecting hole, avoiding falling off, and achieving the purpose of preventing falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0014] Figure 3 It is an explosion diagram of the utility model.

[0015] Description of the numbers in the figure:

[0016] 1. Pin rod; 101. Center hole; 102. Through hole; 2. Tightening block; 3. Inner rod; 301. Top groove; 4. Small positioning pin; 5. Adhesive tape. DETAILED DESCRIPTION

[0017] Specific embodiment 1: Please refer to Figure 1-3 An anti-dropping positioning pin comprises a pin rod 1, a tightening block 2, an inner rod 3 and a small positioning pin 4; a center hole 101 is provided on the pin rod 1, the inner rod 3 is movably sleeved in the center hole 101, a through hole 102 communicating with the center hole 101 is provided on the wall of the pin rod 1, the tightening block 2 is movably installed in the through hole 102, a sawtooth 201 is provided on the outer end of the tightening block 2, a top groove 301 is provided on the outer wall of the inner rod 3, the inner end of the tightening block 2 is inserted into the top groove 301 and abuts against the inner wall of the top groove 301; at the same time, the inner wall of the top groove 301 is a conical surface, and by moving the inner Rod 3, the conical surface of the top groove 301 on the inner rod 3 can abut against the top tightening block 2, thereby driving the top tightening block 2 to move outward, so that the sawtooth 201 on the top tightening block 2 can abut against the inner wall of the connecting hole of the installation pin rod 1, thereby increasing the friction between the pin rod 1 and the inner wall of the connecting hole, and avoiding the situation that the positioning pin slips off; insert the small positioning pin 4 into the center hole 101, the small positioning pin 4 and the center hole 101 have an interference fit, and at the same time, the lower end of the small positioning pin 4 abuts against the upper end surface of the inner rod 3, which can drive the inner rod 3 to move downward, thereby pushing the top tightening block 2 open for clamping. At the same time, a sticky plastic tape 5 is wrapped around the outside of the through hole 102. When in use, the tape 5 is wrapped around the through hole 102 to limit the top tightening block 2, avoiding the situation that the top tightening block 2 slips off during the insertion of the pin rod 1, and at the same time, the sawtooth 201 on the top tightening block 2 can pierce the tape 5, which will not affect the abutment of the sawtooth 201 for clamping, and ensure the normal use of the positioning pin.

[0018] Working principle: In the utility model, the inner rod 3 is first placed in the center hole 101, and then the tightening block 2 is installed in the through hole 102, the inner end of the tightening block 2 is abutted against the top groove 301, and then the plastic tape is wrapped around the through hole 102. When installing the locating pin, the pin rod 1 is inserted into the connecting hole, and finally the small locating pin 4 is inserted into the center hole 101. The small locating pin 4 can tighten the inner rod 3 and drive the inner rod 3 to move downward, so that the top groove 301 with the conical surface can drive the tightening block 2 to move outward, and the serrations 201 of the tightening block 2 pierce the tape and abut against the inner wall of the connecting hole for tightening, thereby increasing the connection stability between the locating pin and the connecting hole and avoiding the problem of the locating pin slipping.

[0019] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An anti-drop positioning pin, characterized in that: The invention comprises a pin rod (1), a tightening block (2), an inner rod (3) and a small positioning pin (4); the pin rod (1) is provided with a central hole (101), the inner rod (3) is movably mounted in the central hole (101), a through hole (102) communicating with the central hole (101) is provided on the wall of the pin rod (1), the tightening block (2) is movably mounted in the through hole (102), a saw tooth (201) is provided at the outer end of the tightening block (2), the inner end of the tightening block (2) abuts against the inner rod (3), and the inner rod (3) drives the tightening block (2) to move; the small positioning pin (4) is inserted into the central hole (101), and the lower end of the small positioning pin (4) abuts against the upper end surface of the inner rod (3).

2. The anti-drop positioning pin according to claim 1, characterized in that: The outer wall of the inner rod (3) is provided with a top groove (301), and the inner end of the top tightening block (2) is inserted into the top groove (301) and abuts against the inner wall of the top groove (301).

3. The anti-drop positioning pin according to claim 2, characterized in that: The inner wall of the top groove (301) is a conical surface.

4. The anti-drop positioning pin according to claim 1, characterized in that: The number of through holes (102) is at least 4, and they are evenly arranged on the pin rod (1) along the circumference of the pin rod (1).

5. The anti-drop positioning pin according to claim 4, characterized in that: An adhesive tape (5) is wrapped around the outside of the through hole (102).

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