Rotary tensioning positioning pin

Abstract

The utility model relates to the technical field of positioning pins, in particular to a rotary tensioning positioning pin which comprises a guide block and a pin seat which are arranged up and down, a rotatable rotating shaft penetrates through the guide block, the lower end of the rotating shaft is rotatably arranged in the pin seat, a tensioning block is arranged in the guide block in a sliding mode, and the inner side of the tensioning block abuts against the rotating shaft. The face, abutting against the tensioning block, of the rotating shaft is a cam face, and a self-locking angle exists between the cam face and the inner side face of the tensioning block. Movement of the tensioning block is combined with self-locking force of the cam surface of the rotating shaft, two actions of tensioning positioning and quick dismounting can be completed by rotating the rotating shaft, and the tensioning device can adapt to assembly requirements of holes of different sizes, is particularly suitable for large-size pin holes, is simple and reliable in structure and convenient and quick to operate, and can be widely applied to various assembly machining equipment and scenes.

Description

Technical Field

[0001] The utility model relates to the technical field of positioning pins, in particular to a rotating tensioning positioning pin. Background Art

[0002] At present, when two workpieces are precisely positioned and connected, locating pins are commonly used. Locating pins are divided into cylindrical pins, diamond pins, elastic cylindrical pins, etc. When two workpieces need to be disassembled quickly, ordinary locating pins are difficult to disassemble, and special tools are required, which is time-consuming and labor-intensive. With the popularization of automation equipment and the reduction of equipment capital investment, it is often necessary for one equipment to produce multiple products. The product tooling on the equipment needs to be changed. The changed tooling must be accurate in positioning and convenient and fast. The existing locating pins are difficult to meet this production requirement. Utility Model Content

[0003] The utility model aims to solve the above problems and provides a rotary tensioning positioning pin, the technical solution of which is as follows:

[0004] A rotary tensioning positioning pin comprises a guide block and a pin seat arranged up and down, a rotatable shaft passing through the guide block, and the lower end of the shaft is rotatably arranged in the pin seat, a tensioning block is slidably arranged in the guide block, the inner side of the tensioning block abuts against the shaft and moves radially along the shaft, the abutting surface between the shaft and the tensioning block is a cam surface, and there is a self-locking angle between the cam surface and the inner side surface of the tensioning block.

[0005] On the basis of the above solution, there are multiple tensioning blocks, and the multiple tensioning blocks are evenly distributed circumferentially on the guide block.

[0006] Based on the above scheme, the end face of the tensioning block is fixedly connected to the guide column, the end face of the guide block is provided with a groove, the guide column is arranged in the groove, a return spring is also arranged in the groove, the return spring is a strip structure, and the inner side of the return spring abuts against the outer side of the guide column.

[0007] On the basis of the above solution, the guide columns are arranged at the upper and lower ends of the tensioning block.

[0008] Preferably, a wrench is provided through the upper portion of the rotating shaft, the wrench is provided above the guide block, and rotates synchronously with the rotating shaft.

[0009] Based on the above scheme, a spring sheet is abutted between the upper surface of the wrench and the inner side of the rotating shaft, the upper end of the guide block is fixedly connected to the end cover, a scale groove is set on the upper surface of the end cover, and the lower surface of the wrench extends downward to form an insert, which is inserted into the scale groove.

[0010] Preferably, the guide block comprises an upper cover, a guide body and a lower cover connected in sequence from top to bottom, the tensioning block is arranged in the guide body, and a disassembly groove is arranged on the outer peripheral surface of the lower end of the guide body. The number of the disassembly grooves is 2 and they are symmetrically arranged along the axis of the rotating shaft.

[0011] The beneficial effects of the utility model are as follows: the movement of the tensioning block is combined with the self-locking force of the cam surface of the rotating shaft, and the two actions of tensioning positioning and quick disassembly can be completed by rotating the rotating shaft. It can adapt to the assembly requirements of holes of different sizes, and is especially suitable for large-sized pin holes. It has a simple and reliable structure, is easy and quick to operate, and can be widely used in various assembly and processing equipment and scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 : Schematic diagram of the appearance structure of the utility model;

[0013] Figure 2 : Sectional view of the utility model in the installed state;

[0014] Figure 3 : Schematic diagram of the installation position of the guide column and the return spring of the utility model;

[0015] Figure 4 : Schematic diagram of the internal structure of the guide block of the utility model;

[0016] Figure 5 : Transverse sectional view of the utility model. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0018] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] In the description of the present utility model, it should be understood that the terms "center", "length", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0020] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0021] like Figures 1 to 5 As shown, a rotary tensioning positioning pin includes a guide block 25 and a pin seat 28 arranged in an upper and lower position. The guide block 25 is arranged in a hole of the upper plate 11, and the pin seat 28 is arranged in a hole of the lower plate 12. A rotatable shaft 21 passes through the guide block 25, and the lower end of the shaft 21 is rotatably arranged in the pin seat 28. A tensioning block 26 is slidably arranged in the guide block 25, and the inner side of the tensioning block 26 abuts against the shaft 21 and moves radially along the shaft 21, as shown in FIG. Figure 5 As shown, the contact surface between the rotating shaft 21 and the tension block 26 is a cam surface, and there is a self-locking angle between the cam surface and the inner side surface of the tension block 26. When the rotating shaft 21 rotates, the cam surface pushes the tension block 26 outward until the outer surface of the tension block 26 abuts against the inner side wall of the hole. At this time, the cam surface and the inner side surface of the tension block 26 are self-locked, clamping the tension block 26 so that it does not move, thereby completing the tension positioning. Preferably, there are multiple tension blocks 26, and the multiple tension blocks 26 are evenly distributed circumferentially on the guide block 25, so as to increase the number and area of ​​the self-locking structure, increase the tension reliability, and balance the force on the rotating shaft 21.

[0022] like Figure 3 and Figure 4 As shown, the end face of the tension block 26 is fixedly connected to the guide column 261, and the end face of the guide block 25 is provided with a groove, and the guide column 261 is arranged in the groove, and a return spring 27 is also arranged in the groove. The return spring 27 is a strip structure, and the inner side of the return spring abuts against the outer side of the guide column 261. When the positioning pin needs to be disassembled or replaced, the rotating shaft 21 is further rotated from the self-locking angle so that the cam surface no longer abuts the tension block 26 outward, and the guide column 261 moves in the direction close to the rotating shaft 21 under the action of the return spring 27, thereby driving the tension block 26 to retract into the guide block 25. Preferably, the guide column 261 is arranged at the upper and lower ends of the tension block 26, and the tension block 26 is stably retracted by the return springs 27 at both ends.

[0023] A spanner 23 is provided through the upper part of the rotating shaft 21. The spanner 23 is a flat and long structure, which is arranged above the guide block 25 and rotates synchronously with the rotating shaft 21. Thus, the rotating shaft 21 can be rotated by rotating the spanner 23, which is convenient for operation and reduces the driving force required for tightening. A spring sheet 22 is abutted between the upper surface of the spanner 23 and the inner side surface of the rotating shaft 21. The upper end of the guide block 25 is fixedly connected to the end cover 24. The upper surface of the end cover 24 is provided with a scale groove 241. The lower surface of the spanner 23 extends downward to form an insert 231, which is inserted into the scale groove 241. When the rotating shaft 21 rotates to the self-locking angle, the insert 231 is inserted into the scale groove 241 by the action of the spring sheet 22, fixing the relative angle between the rotating shaft 21 and the guide block 25 and the tightening block 26, and preventing the cam surface of the rotating shaft 21 and the inner side surface of the tightening block 26 from being disengaged from the self-locking angle due to vibration and other reasons, thereby affecting the tightening effect.

[0024] For easy disassembly, the guide block 25 includes an upper cover, a guide body and a lower cover connected in sequence from top to bottom, the tension block 26 is arranged in the guide body, and a disassembly groove 251 is arranged on the outer peripheral surface of the lower end of the guide body. The number of the disassembly grooves 251 is 2 and they are arranged symmetrically along the axis of the rotating shaft 21. By inserting a special disassembly tool into the disassembly groove 251, the guide body can be easily separated from the lower cover.

[0025] The present invention is described above by way of examples, but the present invention is not limited to the above specific embodiments, and any changes or modifications based on the present invention belong to the scope of protection required by the present invention.

Claims

1. A rotary tensioning positioning pin, characterized in that: The invention comprises a guide block (25) and a pin seat (28) which are arranged in an upper and lower manner. A rotatable shaft (21) passes through the guide block (25), and the lower end of the shaft (21) is rotatably arranged in the pin seat (28). A tension block (26) is slidably arranged in the guide block (25). The inner side of the tension block (26) abuts against the shaft (21) and moves radially along the shaft (21). The abutting surface between the shaft (21) and the tension block (26) is a cam surface, and a self-locking angle exists between the cam surface and the inner side surface of the tension block (26).

2. A rotary tensioning positioning pin according to claim 1, characterized in that: The number of the tensioning blocks (26) is multiple, and the multiple tensioning blocks (26) are evenly distributed circumferentially on the guide block (25).

3. A rotary tensioning positioning pin according to claim 2, characterized in that: The end surface of the tension block (26) is fixedly connected to a guide column (261), the end surface of the guide block (25) is provided with a groove, the guide column (261) is arranged in the groove, a return spring (27) is also arranged in the groove, the return spring (27) is a strip structure, and the inner side of the return spring abuts against the outer side of the guide column (261).

4. A rotary tensioning positioning pin according to claim 3, characterized in that: The guide columns (261) are arranged at the upper and lower ends of the tensioning block (26).

5. The rotary tensioning positioning pin according to claim 1, characterized in that: A wrench (23) is arranged through the upper part of the rotating shaft (21); the wrench (23) is arranged above the guide block (25) and rotates synchronously with the rotating shaft (21).

6. A rotary tensioning positioning pin according to claim 5, characterized in that: A spring sheet (22) is abutted between the upper surface of the wrench (23) and the inner side surface of the rotating shaft (21); the upper end of the guide block (25) is fixedly connected to the end cover (24); a scale groove (241) is arranged on the upper surface of the end cover (24); the lower surface of the wrench (23) extends downward to form an insert sheet (231); and the insert sheet (231) is inserted into the scale groove (241).

7. The rotary tensioning positioning pin according to claim 1, characterized in that: The guide block (25) comprises an upper cover, a guide body and a lower cover which are connected in sequence from top to bottom. The tension block (26) is arranged in the guide body. A disassembly groove (251) is arranged on the outer peripheral surface of the lower end of the guide body. The number of the disassembly grooves (251) is 2 and they are arranged symmetrically along the axis of the rotating shaft (21).

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