CN216714940U

CN216714940U - Anti-drop positioning pin structure

Info

Publication number: CN216714940U
Application number: CN202123323465.5U
Authority: CN
Inventors: 李丽萍
Original assignee: Kunshan Xiangren Precision Machinery Co ltd
Current assignee: Kunshan Xiangren Precision Machinery Co ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-06-10
Anticipated expiration: 2031-12-27

Abstract

The utility model discloses an anti-drop positioning pin structure, which comprises a pin bush and two bolts, wherein the left part and the right part of a central through hole of the pin bush are screw holes, and the middle part of the central through hole is provided with an anti-drop groove; the bolt structurally comprises a bolt head and a bolt body, wherein a slot is formed in the left end of the bolt head, the bolt body is screwed into a screw hole, and an anti-falling part is arranged in the bolt; the anti-falling part structurally comprises a central column, an anti-falling block and a moving rod, wherein the central column is arranged in the bolt body, and a first push block is arranged at the right end of the central column; the anti-falling block is arranged in a through hole on the outer side wall of the right end part of the bolt body, the inner side end of the anti-falling block is attached to the first push block, and the outer side end of the anti-falling block is inserted into the anti-falling groove; the movable rod is arranged in a cavity of the bolt head, a protruding head is arranged at the left end of the movable rod, a second push block is arranged at the right end of the movable rod, the protruding head stretches into the slot, and the second push block is attached to the left end of the central column. The utility model has the anti-drop function and is convenient to disassemble.

Description

Anti-drop positioning pin structure

Technical Field

The utility model relates to the technical field of positioning pins, in particular to an anti-falling positioning pin structure.

Background

The locating pin is a part which takes part in limiting the freedom degree of the object by taking the workpiece hole as a locating reference, controls the linear motion of the object in X, Y, Z three axial directions and controls six freedom degrees of motion of the object in the rotary motion around X, Y, Z. In a mold formed of two or more parts, the pins are designed to accurately position adjacent parts of the mold.

The structure of the positioning pin for rotary connection comprises a pin sleeve and a bolt, however, the bolt and the pin sleeve are easily driven to vibrate in the movement process of parts, so that the bolt is reversely rotated and falls off from the pin sleeve. Accordingly, one skilled in the art provides an anti-drop dowel pin structure to solve the above problems in the background art.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an anti-drop positioning pin structure which comprises a pin sleeve and two bolts, wherein the thread sections of the left part and the right part of a central through hole of the pin sleeve are screw holes, and two annular grooves arranged in the middle part of the central through hole of the pin sleeve are anti-drop grooves; the two bolts are respectively arranged at the left part and the right part of the pin sleeve, the bolt structurally comprises a bolt head and a bolt body, a groove arranged at the left end of the bolt head is a slot, the bolt head is fixed at the left end of the bolt body, the bolt body is screwed into the screw hole, and an anti-falling part is arranged in the bolt; the anti-falling part structurally comprises a central column, an anti-falling block and a moving rod, wherein the central column is arranged in a central hole of the bolt body, and a wedge-shaped block arranged at the right end of the central column is a first push block; the anti-falling block is arranged in a through hole on the outer side wall of the right end part of the bolt body, the inner side end of the anti-falling block is attached to the first push block, and the outer side end of the anti-falling block is inserted into the anti-falling groove; the carriage release lever sets up the intracavity at the bolt head, the arc protruding piece that the left end of carriage release lever set up is the wedge that protruding head, right-hand member set up and is No. two ejector pads, the slot is visited into to the protruding head, No. two ejector pads insert in the bolt body to laminate with the left end of center post.

Preferably: the inner side surface of the anti-falling block is connected with the inner wall of the bolt body through a first spring.

Preferably: a second spring is sleeved on the right end of the central column, and two ends of the second spring are respectively connected with the inner wall of the bolt body and the left end of the first push block.

Preferably: the outer side surface of the movable rod is connected with the inner wall of the bolt head through a third spring.

Preferably: the left end and the right end of the pin sleeve are respectively provided with a gasket, and the gaskets are arranged between the bolt head and the pin sleeve.

The utility model has the technical effects and advantages that:

1. the anti-falling block is arranged, and the anti-falling block is abutted outwards after the central column moves rightwards, so that the anti-falling block is inserted into the anti-falling groove, and the left bolt is prevented from moving leftwards and the right bolt is prevented from moving rightwards through the anti-falling block, so that the bolt is prevented from falling from the pin bush.

2. The moving rod is arranged, the wrench is inserted into the slot to push the moving rod outwards, so that after the second push block leaves the central column, the central column moves leftwards, the anti-falling block leaves the anti-falling groove, and the bolt and the pin bush are convenient to disassemble.

Drawings

Fig. 1 is a schematic structural diagram of an anti-drop positioning pin structure provided in an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a pin sleeve of an anti-drop positioning pin structure provided in an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a bolt of an anti-drop positioning pin structure provided in the embodiment of the present application;

fig. 4 is a structural schematic view of a bolt head of the anti-drop positioning pin structure provided by the embodiment of the application;

fig. 5 is an enlarged view of a right end portion of fig. 3.

In the figure: the bolt comprises a pin sleeve 10, a screw hole 11, an anti-falling groove 12, a gasket 13, a bolt 20, a bolt head 21, a bolt body 22, a central column 23, a first push block 24, an anti-falling block 25, a first spring 26, a second spring 27, a slot 28, a moving rod 29, a protruding head 30, a second push block 31 and a third spring 32.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the utility model in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the utility model and the practical application, and to enable others of ordinary skill in the art to understand the utility model for various embodiments with various modifications as are suited to the particular use contemplated.

Example 1

Referring to fig. 1 to 5, in the present embodiment, an anti-drop positioning pin structure is provided, including a pin bush 10 and two bolts 20, wherein a threaded section of a left portion and a threaded section of a right portion of a central through hole of the pin bush 10 are screw holes 11, and two annular grooves disposed in a middle portion are anti-drop grooves 12; the two bolts 20 are respectively arranged at the left and right parts of the pin sleeve 10, the bolt 20 structurally comprises a bolt head 21 and a bolt body 22, a groove arranged at the left end of the bolt head 21 is a slot 28, the bolt head 21 is fixed at the left end of the bolt body 22, the bolt body 22 is screwed into the screw hole 11, and an anti-falling part is arranged in the bolt 20; the anti-falling part structurally comprises a central column 23, an anti-falling block 25 and a moving rod 29, wherein the central column 23 is arranged in a central hole of a bolt body 22, a wedge-shaped block arranged at the right end of the central column 23 is a first push block 24, a second spring 27 is sleeved at the right end of the central column 23, two ends of the second spring 27 are respectively connected with the inner wall of the bolt body 22 and the left end of the first push block 24, and the central column 23 is pulled leftwards after the second spring 27 is reset; the anti-falling block 25 is arranged in a through hole on the outer side wall of the right end part of the bolt body 22, the inner side end of the anti-falling block 25 is attached to the first push block 24, the outer side end of the anti-falling block 25 is inserted into the anti-falling groove 12, the inner side surface of the anti-falling block 25 is connected with the inner wall of the bolt body 22 through a first spring 26, and the anti-falling block 25 is pulled into the bolt body 22 after the first spring 26 is reset; the movable rod 29 is arranged in a cavity of the bolt head 21, an arc-shaped protruding block arranged at the left end of the movable rod 29 is a protruding head 30, a wedge-shaped block arranged at the right end of the movable rod 29 is a second pushing block 31, the protruding head 30 extends into the slot 28, the second pushing block 31 is inserted into the bolt body 22 and is attached to the left end of the central column 23, the outer side surface of the movable rod 29 is connected with the inner wall of the bolt head 21 through a third spring 32, and the movable rod 29 is pushed inwards after the third spring 32 is reset; the left end and the right end of the pin sleeve 10 are respectively provided with a gasket 13, and the gaskets 13 are cushioned between the bolt head 21 and the pin sleeve 10.

The working principle of the utility model is as follows: during installation, the pin bush 10 penetrates through the positioning holes of the two parts, and then the two gaskets 13 are respectively sleeved at the left end and the right end of the pin bush 10 to position the pin bush 10; then two bolts 20 are screwed into the pin bosses 10; when the bolt 10 is screwed in, firstly, the head of a wrench is inserted into the slot 28, the wrench head pushes the protruding head 30 out of the slot 28 and drives the moving rod 29 to move outwards, after the moving rod 29 drives the second pushing block 31 to move outwards, the second pushing block 31 leaves the central column 23, the central column 23 moves leftwards under the action of the second spring 27, and after the first pushing block 24 leaves the anti-disengaging block 25, the anti-disengaging block 25 retracts into the bolt body 22 under the action of the first spring 26; then, the bolt body 22 is completely screwed into the screw hole 11, the wrench head is taken out, the third spring 32 pushes the moving rod 29 to move inwards, the second pushing block 31 pushes the central column 23 rightwards after moving inwards, the first pushing block 24 pushes the anti-falling block 25 outwards after moving rightwards, the anti-falling block 25 is inserted into the annular groove 12, the bolt body 11 can be prevented from moving outwards, and the anti-falling purpose is achieved.

It is to be understood that the described embodiments are merely a few embodiments of the utility model, and not all embodiments. All other embodiments, which can be derived by one of ordinary skill in the art and related arts based on the embodiments of the present invention without any creative effort, shall fall within the protection scope of the present invention. Structures, devices, and methods of operation not specifically described or illustrated herein are generally practiced in the art without specific recitation or limitation.

Claims

1. The anti-drop positioning pin structure is characterized by comprising a pin sleeve (10) and two bolts (20), wherein the thread sections of the left part and the right part of a central through hole of the pin sleeve (10) are screw holes (11), and two annular grooves arranged in the middle part are anti-drop grooves (12); the two bolts (20) are respectively arranged at the left part and the right part of the pin sleeve (10), the bolt (20) structurally comprises a bolt head (21) and a bolt body (22), a groove arranged at the left end of the bolt head (21) is a slot (28), the bolt head (21) is fixed at the left end of the bolt body (22), the bolt body (22) is screwed into the screw hole (11), and a falling-preventing part is arranged in the bolt (20); the anti-falling part structurally comprises a central column (23), an anti-falling block (25) and a moving rod (29), wherein the central column (23) is arranged in a central hole of a bolt body (22), and a wedge-shaped block arranged at the right end of the central column (23) is a first push block (24); the anti-falling block (25) is arranged in a through hole in the outer side wall of the right end part of the bolt body (22), the inner side end of the anti-falling block (25) is attached to the first push block (24), and the outer side end of the anti-falling block (25) is inserted into the anti-falling groove (12); the utility model discloses a bolt, including the bolt head, shift lever (29), the arc protruding piece that the left end of shift lever (29) set up is the protruding head (30), the wedge piece that the right-hand member set up is No. two ejector pads (31), slot (28) are visited in protruding head (30), No. two ejector pads (31) insert in the bolt body (22) to the left end laminating with center post (23).

2. The structure of claim 1, characterized in that the inner side of the anti-drop block (25) is connected with the inner wall of the bolt body (22) through a first spring (26).

3. The anti-drop positioning pin structure according to claim 1, wherein a second spring (27) is sleeved on a right end portion of the central column (23), and two ends of the second spring (27) are respectively connected with an inner wall of the bolt body (22) and a left end of the first push block (24).

4. The structure of claim 1, wherein the outer side of the moving rod (29) is connected with the inner wall of the bolt head (21) through a third spring (32).