Anti-abrasion positioning pin

Abstract

The utility model provides an anti-abrasion positioning pin which comprises a body, the body comprises a positioning table, a positioning column is arranged at one end of the positioning table, a connecting column is arranged at the other end of the positioning table, the outer diameter of the positioning table is larger than that of a pin head, the outer diameter of the pin head is larger than that of the positioning column, and the outer diameter of the positioning column is larger than that of the connecting column. A pin head is detachably installed on the connecting column, a plurality of cutting grooves are formed in the outer circumferential face of the pin head so that the pin head can be in a cross shape, a conical section is arranged at the end, away from the positioning table, of the pin head, and a functional groove is formed in the end face of the free end of the conical section. The positioning pin is reasonable in structural design, the pin head is detachably installed on the body, after the positioning pin is used for a period of time and is abraded, restoration can be achieved by replacing the pin head, the body can be reused, the use cost is reduced, and the service life of the positioning pin is effectively prolonged by replacing the pin head.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of automobile accessory welding auxiliary tooling, and particularly relates to a wear-resistant positioning pin. BACKGROUND

[0002] The positioning pin is a part for taking a workpiece hole as a positioning reference and participating in limiting the degree of freedom of an object, and is used for controlling the linear motion of an object in three axial directions and the rotational motion of the object around three axes, and leaving one degree of freedom. The positioning pin is widely used in production activities such as part transfer and detection due to high positioning accuracy and good centering effect, and in particular, in the process of welding automobile accessories. The common positioning pin in the prior art is prone to wear after being used for a period of time. After wear, the positioning deviation is caused, the part machining precision is reduced, and the positioning pin is generally scrapped after being worn to a certain extent, thereby causing waste. Especially for automobile accessory production enterprises with large quantities, if the worn positioning pins are directly scrapped, the production manufacturing cost is also increased to a certain extent. Therefore, it is necessary to design a wear-resistant positioning pin capable of prolonging the service life. SUMMARY

[0003] Therefore, the application aims to overcome the defects in the prior art and provide a wear-resistant positioning pin.

[0004] To achieve the above-mentioned purpose, the technical scheme of the application is as follows:

[0005] A wear-resistant positioning pin comprises a body, the body comprises a positioning table, one end of the positioning table is provided with a positioning column, the other end of the positioning table is connected with a connecting column, the outer diameter of the positioning table is greater than the outer diameter of a pin head, the outer diameter of the pin head is greater than the outer diameter of the positioning column, and the outer diameter of the positioning column is greater than the outer diameter of the connecting column; the connecting column is detachably provided with the pin head, the outer circumferential surface of the pin head is provided with a plurality of cutting grooves, so that the pin head is in a cross shape, a tapered section is arranged at the end of the pin head away from the positioning table, and a functional groove is arranged on the end face of the free end of the pin head.

[0006] Further, the functional groove is a polygonal groove.

[0007] Further, the functional groove is a square or hexagonal groove.

[0008] Further, the connecting column is provided with an external thread structure, and the inner side of the pin head is provided with an internal thread structure matched with the external thread structure of the connecting column.

[0009] Further, the connecting column is provided with a ring groove, the cutting groove position of the pin head is provided with a positioning hole, a positioning piece is arranged in the positioning hole, and the inner end of the positioning piece is inserted into the ring groove.

[0010] Further, the positioning piece is a screw, the positioning hole is provided with a sink, the screw cap part of the positioning piece is sunk into the sink, and the threaded section of the positioning piece is in threaded connection with the positioning hole.

[0011] Further, an end of the positioning column away from the positioning table is provided with a connecting section.

[0012] Further, the connecting section is provided with an external thread structure.

[0013] Compared with the prior art, the present application has the following advantages:

[0014] The present application has reasonable structure design, the pin head can be detachably installed on the body, when the positioning pin is used for a period of time and a small amount of wear is generated, the original state can be restored by replacing the pin head, the body can be repeatedly used, compared with the scheme of scrapping the positioning pin as a whole, the use cost is effectively reduced, and the positioning accuracy in the application process is guaranteed without the need of replacing the positioning pin when the wear is serious, the service life of the positioning pin can be effectively prolonged by replacing the pin head regularly. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings, which form a part of the present application, are used to provide further understanding of the present application, and the illustrative embodiments of the present application and their description serve the purpose of explaining the present application. The present application is not limited by the improper interpretation of the accompanying drawings. In the drawings:

[0016] Figure 1 is a structural schematic view of the present application;

[0017] Figure 2 is a schematic view of the connecting section provided on the positioning column in the embodiment of the present application;

[0018] Figure 3 is a schematic view of the pin head part in the present application;

[0019] Figure 4 is a top view of Figure 3 ;

[0020] Figure 5 is a schematic view of the body when the connecting column is provided with an external thread structure in the present application;

[0021] Figure 6 is a schematic view of the body when the connecting column is provided with a ring groove in the present application;

[0022] Figure 7 is a schematic view of the pin head provided with a positioning hole in the present application;

[0023] Figure 8 is a schematic view when the pin head and the body are fixed by the connecting piece in the present application. DETAILED DESCRIPTION

[0024] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0025] In the description of the present application, it is to be understood by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and not indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" and the like can be explicitly or implicitly included one or more. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0026] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0027] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0028] A wear-resistant positioning pin, as shown in Figures 1 to 8 It comprises a body 1 and a pin head 2 on the body, the body comprises a positioning table 3, one end of the positioning table is provided with a positioning column 4, the other end is connected with a column 5, the outer diameter of the positioning table is greater than the outer diameter of the pin head, the outer diameter of the pin head is greater than the outer diameter of the positioning column, and the outer diameter of the positioning column is greater than the outer diameter of the connecting column; the connecting column is detachably mounted with the pin head, the inner cavity of the pin head towards the one end of the connecting column is open, the outer circumferential surface of the pin head is provided with a plurality of cutting grooves 6, so that the pin head is in the shape of a cross, and a tapered section 7 is arranged at the end of the pin head away from the positioning table, and a functional groove 8 is arranged on the end face of the free end of the tapered section.

[0029] Generally, the functional groove is a polygonal groove. As an example, the functional groove is a square or hexagonal groove. The pin head can be conveniently screwed by means of the functional groove, so as to facilitate the pin head to be removed from the body, for example, a four-prism or hexagonal wrench can be inserted into the functional groove to perform screwing operation on the corresponding pin head.

[0030] In order to improve the connecting ability of the positioning pin, in an alternative embodiment, the connecting column is provided with a connecting section 12 at the end away from the positioning table. The connecting section is provided with an external thread structure. In an alternative embodiment, the connecting column is provided with an external thread structure 9, and the inner cavity of the pin head is provided with an internal thread structure matching the external thread structure of the connecting column. In this scheme, the pin head is screwed on the connecting column, and the pin head can be conveniently installed or removed by screwing operation.

[0031] In another alternative embodiment, the pin head and the body are fixed by a connecting member. The specific structure can be that the connecting column is provided with a ring groove 10, the cutting groove of the pin head is provided with a positioning hole 11, and a positioning member 11 is installed in the positioning hole, and the inner end of the positioning member is inserted into the ring groove. As an example, the positioning member is a screw, the positioning hole is provided with a sink, and the screw cap part of the positioning member is inserted into the sink, and the threaded section of the positioning member is screwed with the positioning hole. In this scheme, the pin head is inserted into the corresponding connecting column, and is positioned by the positioning member.

[0032] The structure of the present application is reasonable, the pin head can be detachably installed on the body, when the positioning pin is used for a period of time and a small amount of wear is generated, the pin head can be replaced to restore, the body can be repeatedly used, compared with the scheme that the positioning pin is scrapped as a whole, the use cost is effectively reduced, and the positioning accuracy in the application process is ensured without the need of replacing the positioning pin when the wear is serious, the service life of the positioning pin is effectively prolonged by regularly replacing the pin head.

[0033] The above only describes the preferred embodiments of the present application, and does not limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An anti-friction dowel pin, characterized by: The utility model relates to a positioning device, including a body, the body includes a positioning table, one end of positioning table is equipped with a positioning column, the other end is connected with a column, the outer diameter of positioning table is greater than the outer diameter of pin head, the outer diameter of pin head is greater than the outer diameter of positioning column, the outer diameter of positioning column is greater than the outer diameter of connecting column, the pin head is detachably installed on the connecting column, the outer circumferential surface of pin head is equipped with a plurality of cutting grooves, so that pin head presents cross type, and the end away from positioning table of pin head is equipped with a taper section, and the end face of free end is equipped with a functional groove.

2. A wear resistant locating pin according to claim 1, characterized in that: The functional groove is a polygonal groove.

3. A wear resistant locating pin according to claim 2, wherein: The functional groove is a square or hexagonal groove.

4. A wear resistant alignment pin according to claim 1, wherein: The connecting column is provided with an external thread structure, and the inner side of the pin head is provided with an internal thread structure matched with the external thread structure of the connecting column.

5. A wear resistant alignment pin according to claim 1, wherein: The connecting column is provided with a ring groove, and the cutting groove position of the pin head is provided with a positioning hole, a positioning member is installed in the positioning hole, and the inner end of the positioning member is inserted into the ring groove.

6. A wear resistant locating pin according to claim 5, wherein: The positioning member is a screw, the positioning hole is provided with a counterbore, the screw cap part of the positioning member is immersed into the counterbore, and the threaded section of the positioning member is screwed with the positioning hole.

7. A wear resistant bushing as defined in claim 1 wherein: The end away from the positioning table of the positioning column is provided with a connecting section.

8. A wear resistant locating pin according to claim 7, wherein: The connecting section is provided with an external thread structure.

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