Telescopic tensioning positioning pin

Abstract

The utility model relates to the technical field of positioning pins, in particular to a telescopic tensioning positioning pin which comprises an upper cover, a guide body, a lower cover and a pin seat which are fixedly arranged in sequence, the lower end of the lower cover extends into an inner hole of the pin seat, a tensioning block is arranged in the guide body, and the tensioning block moves in the radial direction of the guide body; a tensioning part is arranged in the guide body and moves along the axis of the guide body, the peripheral face of the tensioning part abuts against the inner side face of the tensioning block, the inner side face of the tensioning block and the peripheral face of the tensioning part are conical faces, and a self-locking angle exists between the inner side face of the tensioning block and the peripheral face of the tensioning part. Movement of the tensioning part is combined with self-locking force of the conical surface, two actions of tensioning positioning and quick dismounting can be completed by axially moving the tensioning part, 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 telescopic 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 telescopic tensioning positioning pin, the technical solution of which is as follows:

[0004] A telescopic tensioning positioning pin comprises an upper cover, a guide body, a lower cover and a pin seat which are fixedly arranged in sequence, wherein the lower end of the lower cover extends into the inner hole of the pin seat, a tensioning block is arranged in the guide body, and the tensioning block moves radially along the guide body; a tensioning part is arranged in the guide body, and the tensioning part moves along the axis of the guide body, the circumferential surface of the tensioning part abuts against the inner side surface of the tensioning block, the inner side surface of the tensioning block and the circumferential surface of the tensioning part are both conical surfaces, and there is a self-locking angle between the inner side surface of the tensioning block and the circumferential surface of the tensioning part.

[0005] Based on the above solution, the diameter of the tensioning portion decreases in the direction approaching the lower cover.

[0006] Preferably, the tensioning portion sequentially and fixedly connects the plug rod and the handle in a direction away from the lower cover, and the plug rod is arranged to penetrate the upper cover.

[0007] On the basis of the above solution, the plug rod outer shell is connected with a compression spring, and the compression spring abuts between the upper cover and the upper end surface of the tensioning part.

[0008] Preferably, the end face of the tension block is fixedly connected to a guide column, the end face of the guide body 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.

[0009] On the basis of the above solution, the guide columns are arranged at the upper and lower ends of the tensioning block.

[0010] Preferably, there are multiple tensioning blocks, which are evenly distributed circumferentially on the guide body, thereby increasing the tensioning reliability and balancing the force on the tensioning part.

[0011] Preferably, a disassembly groove is provided on the outer peripheral surface of the lower end of the guide body, and the number of the disassembly grooves is 2 and they are symmetrically arranged along the axis of the guide body.

[0012] The beneficial effects of the utility model are: combining the movement of the tensioning part with the self-locking force of the cone surface, and completing the two actions of tensioning positioning and quick disassembly by axially moving the tensioning part, which 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

[0013] Figure 1 : Schematic diagram of the appearance structure of the utility model;

[0014] Figure 2 : Sectional view of the utility model in the installed state;

[0015] Figure 3 : Schematic diagram of the installation position of the guide column and the return spring of the utility model;

[0016] Figure 4 : Schematic diagram of the internal structure of the guide body 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 4 As shown, a telescopic tensioning positioning pin comprises an upper cover 31, a guide body 32, a lower cover 33 and a pin seat 4 which are fixedly arranged in sequence. The upper cover 31, the guide body 32 and the lower cover 33 are arranged in the hole of the upper plate 11, the pin seat 4 is arranged in the hole of the lower plate 12, the lower end of the lower cover 33 extends into the inner hole of the pin seat 4, a tensioning block 51 is arranged in the guide body 32, and the tensioning block 51 moves radially along the guide body 32; a tensioning portion 23 is arranged in the guide body 32, and the tensioning portion 23 moves along the axis of the guide body 32, the circumference of the tensioning portion 23 abuts against the inner side surface of the tensioning block 51, the inner side surface of the tensioning block 51 and the circumference of the tensioning portion 23 are both conical surfaces, the diameter of the tensioning portion 23 decreases in the direction close to the lower cover 33, and there is a self-locking angle between the inner side surface of the tensioning block 51 and the circumference of the tensioning portion 23. When the tensioning part 23 moves toward the pin seat 4, the circumference of the tensioning part 23 pushes the tensioning block 51 outward until the outer surface of the tensioning block 51 abuts against the inner wall of the hole. At this time, the circumference of the tensioning part 23 and the inner side of the tensioning block 51 are self-locked, clamping the tensioning block 51 so that it does not move, thereby completing the tensioning positioning. Preferably, there are multiple tensioning blocks 51, which are evenly distributed circumferentially on the guide body 32, thereby increasing the tensioning reliability and balancing the force on the tensioning part 23.

[0022] The tensioning part 23 is fixedly connected to the plug rod 22 and the handle 21 in sequence in a direction away from the lower cover 33. The plug rod 22 is arranged through the upper cover 31, and the movement of the tensioning part 23 is controlled by the handle 21, which is convenient for operation. The plug rod 22 is covered with a compression spring 6, which abuts between the upper cover 31 and the upper end surface of the tensioning part 23 to increase the compression force of the tensioning part 23 on the tensioning block 51, and prevent the tensioning part 23 and the tensioning block 51 from being disengaged from the self-locking angle due to vibration or shaking, thereby affecting the tensioning effect.

[0023] like Figure 3 and Figure 4 As shown, the end face of the tension block 51 is fixedly connected to the guide column 52, and the end face of the guide body 32 is provided with a groove, and the guide column 52 is arranged in the groove. A reset spring 53 is also arranged in the groove. The reset spring 53 is a strip structure, and the inner side of the reset spring abuts against the outer side of the guide column 52. When the positioning pin needs to be disassembled or replaced, the tension part 23 is pulled outward from the self-locking angle so that the circumference of the tension part 23 no longer abuts against the inner side of the tension block 51. The guide column 52 moves to a position close to the center under the action of the reset spring 53, thereby driving the tension block 51 to retract into the guide body 32. Preferably, the guide column 52 is arranged at the upper and lower ends of the tension block 51, and the tension block 52 is stably retracted by the reset springs 53 at both ends.

[0024] Preferably, a disassembly groove 34 is provided on the outer peripheral surface of the lower end of the guide body 32. The number of the disassembly grooves 34 is two and they are symmetrically arranged along the axis of the guide body 32. By inserting a special disassembly tool into the disassembly groove 34, 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 telescopic tensioning positioning pin, characterized in that: The invention comprises an upper cover (31), a guide body (32), a lower cover (33) and a pin seat (4) which are fixedly arranged in sequence. The lower end of the lower cover (33) extends into the inner hole of the pin seat (4). A tensioning block (51) is arranged in the guide body (32). The tensioning block (51) moves radially along the guide body (32). A tensioning portion (23) is arranged in the guide body (32). The tensioning portion (23) moves along the axis of the guide body (32). The circumference of the tensioning portion (23) abuts against the inner surface of the tensioning block (51). Both the inner surface of the tensioning block (51) and the circumference of the tensioning portion (23) are conical surfaces. There is a self-locking angle between the inner surface of the tensioning block (51) and the circumference of the tensioning portion (23).

2. A telescopic tensioning positioning pin according to claim 1, characterized in that: The diameter of the tensioning portion (23) decreases in a direction approaching the lower cover (33).

3. The telescopic tensioning positioning pin according to claim 1, characterized in that: The tensioning portion (23) is sequentially fixedly connected to the plug rod (22) and the handle (21) in a direction away from the lower cover (33), and the plug rod (22) is arranged to penetrate the upper cover (31).

4. A telescopic tensioning positioning pin according to claim 3, characterized in that: The plug rod (22) is outer-mounted with a compression spring (6), and the compression spring (6) abuts between the upper cover (31) and the upper end surface of the tensioning portion (23).

5. The telescopic tensioning positioning pin according to claim 1, characterized in that: The end surface of the tension block (51) is fixedly connected to a guide column (52), the end surface of the guide body (32) is provided with a groove, the guide column (52) is arranged in the groove, a return spring (53) is also arranged in the groove, the return spring (53) is a strip structure, and the inner side of the return spring abuts against the outer side of the guide column (52).

6. The telescopic tensioning positioning pin according to claim 5, characterized in that: The guide posts (52) are arranged at the upper and lower ends of the tensioning block (51).

7. The telescopic tensioning positioning pin according to claim 1, characterized in that: There are a plurality of tensioning blocks (51) which are evenly distributed circumferentially on the guide body (32), thereby increasing the tensioning reliability and balancing the force on the tensioning portion (23).

8. The telescopic tensioning positioning pin according to claim 1, characterized in that: A disassembly groove (34) is arranged on the outer peripheral surface of the lower end of the guide body (32), and the number of the disassembly grooves (34) is two and they are arranged symmetrically along the axis of the guide body (32).

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