Jig for crimping sampling hole and nut of direct current shunt

Abstract

The utility model provides a jig for crimping a sampling hole and a nut of a direct-current shunt, relates to the technical field of direct-current shunt processing jigs, and aims to solve the technical problem that the working time cost is increased due to frequent replacement of a direct-current shunt crimping jig in the prior art. A jig for direct current shunt sampling hole and nut crimping comprises a positioning column, the upper end face and the lower end face of the positioning column are provided with a first positioning hole and a second positioning hole respectively, and the first positioning hole and the second positioning hole are matched with nuts of different sizes respectively, so that one jig corresponds to pressing rivet nuts of two dimensions. The jig can be turned over and switched at any time according to the size of the rivet nut, the replacement frequency of the jig is reduced, and labor-hour cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of DC shunt processing fixture technology, specifically to a fixture for crimping sampling holes and nuts in a DC shunt. Background Technology

[0002] The DC shunt is mainly used for current monitoring and is composed of T2 copper and 6J13 copper alloy. The DC shunt includes two sampling plates and a connecting plate between the two sampling plates. Both sampling plates are made of T2 copper, and the connecting plate is made of 6J13 copper alloy.

[0003] Shunt units with press-fit nuts belong to the category of resistors. They consist of a DC shunt and a press-fit nut, joined together using a crimping machine. Specifically, the DC shunt has a sampling hole, and the press-fit nut is riveted onto the sampling hole using a crimping machine. During crimping, the DC shunt is placed on a crimping fixture, which has limiting holes that match the size of the press-fit nut. Currently, each crimping fixture corresponds to a specific size of press-fit nut, leading to frequent fixture changes and increased labor costs. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a fixture for crimping the sampling hole and nut of a DC shunt, so as to solve the technical problem that the frequent replacement of the DC shunt crimping fixture in the prior art leads to increased labor costs.

[0005] To solve the above-mentioned technical problems, this utility model provides a fixture for crimping sampling holes and nuts in a DC shunt, including a positioning post. The upper and lower end faces of the positioning post are respectively provided with a first positioning hole and a second positioning hole, and the first positioning hole and the second positioning hole are respectively adapted to nuts of different sizes.

[0006] With the above structure, the fixture for crimping sampling holes and nuts of a DC shunt has the following advantages: the positioning post serves as the lower mold part of the crimping fixture, and the first and second positioning holes on the upper and lower end faces of the positioning post correspond to nuts of different sizes, so that one fixture can be used for two sizes of crimping nuts. The fixture can be flipped and switched at any time according to the size of the crimping nuts, reducing the frequency of fixture replacement and reducing labor costs. In addition, since the nut is placed in the first / second positioning hole during crimping and the DC splitter is located above the nut, the crimping machine directly presses on the DC splitter during crimping, resulting in a larger contact area and preventing deformation of the DC splitter.

[0007] As an improvement, the outer wall of the positioning post is provided with a protrusion; with this structure, the protrusion plays a positioning role, allowing the positioning post to be placed on the through hole of the base.

[0008] As an improvement, the positioning post has a circular cross-section, and the protrusion has a closed annular cross-section along the circumference. With this structure, the annular protrusion makes the positioning post more stable when placed on the base.

[0009] As an improvement, the protrusion is coaxially arranged with the positioning post; this structure ensures that the pressing force is evenly transmitted to the center of the positioning post, avoiding tilting of the rivet nut or deviation in pressing position due to eccentricity, and improving pressing accuracy.

[0010] As an improvement, the inner diameter of the first positioning hole is smaller than that of the second positioning hole, and the distance between the bottom end of the first positioning hole and the bottom end of the protrusion is greater than the distance between the bottom end of the second positioning hole and the upper end face of the protrusion. With this structure, the installation height requirements of nuts of different sizes can be adapted through differentiated spacing design, so that the height of nuts of different sizes placed in the corresponding first positioning hole / second positioning hole is approximately the same, preventing product bending caused by insufficient pressing height, gaps, or pressing exceeding the limit during pressing.

[0011] As an improvement, the positioning post is made of metal; with this structure, the metal material enhances the jig's compressive strength and wear resistance, making it suitable for high-frequency crimping operations.

[0012] As an improvement, rounded corners are provided between the upper end face of the positioning post and the side wall, and between the lower end face of the positioning post and the side wall.

[0013] As an improvement, the first positioning hole and the second positioning hole are set coaxially. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of the present invention.

[0015] Figure 2 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 3 This is a top view of the upper surface of this utility model.

[0017] Figure 4 This is a top view of the lower end face of this utility model.

[0018] Reference numerals: 1. Positioning pin; 2. First positioning hole; 3. Second positioning hole; 4. Protrusion; 5. Rounded corner. Detailed Implementation

[0019] The following is a detailed description of a fixture for crimping sampling holes and nuts in a DC shunt, in conjunction with the accompanying drawings.

[0020] like Figures 1 to 4As shown, a fixture for crimping sampling holes and nuts in a DC shunt includes a positioning post 1. The upper and lower end faces of the positioning post 1 are respectively provided with a first positioning hole 2 and a second positioning hole 3. The first positioning hole 2 and the second positioning hole 3 are adapted to nuts of different sizes, and the first positioning hole 2 and the second positioning hole 3 are coaxially arranged.

[0021] like Figure 3 and Figure 4 As shown, the first positioning hole 2 and the second positioning hole 3 are both round holes. In order to accommodate nuts of different sizes, the inner diameters of the first positioning hole 2 and the second positioning hole 3 are different. During the crimping process, the nut is placed in the first positioning hole 2 or the second positioning hole 3, and the nut is limited by the first positioning hole 2 or the second positioning hole 3.

[0022] like Figure 1 and Figure 2 As shown, the outer wall of the positioning post 1 is provided with a protrusion 4. The cross-section of the positioning post 1 is circular, and the cross-section of the protrusion 4 is a closed annulus along the circumference. The protrusion 4 is coaxially arranged with the positioning post 1.

[0023] The positioning post 1 serves as the lower mold part of the crimping fixture. The first positioning hole 2 and the second positioning hole 3 on the upper and lower end faces of the positioning post 1 correspond to nuts of different sizes, so that one fixture can be used for two sizes of crimping nuts. The fixture can be flipped and switched at any time according to the size of the crimping nut, reducing the frequency of fixture replacement and reducing labor costs. A through hole is opened on the base of the crimping machine, and the part of the positioning post 1 located below the protrusion 4 can pass through the through hole. The positioning post 1 is placed on the base through the protrusion 4.

[0024] The inner diameter of the first positioning hole 2 is smaller than the inner diameter of the second positioning hole 3. The distance between the bottom end of the first positioning hole 2 and the bottom end of the protrusion 4 is greater than the distance between the bottom end of the second positioning hole 3 and the upper surface of the protrusion 4. By using a differentiated spacing design, the installation height requirements of nuts of different sizes are adapted, so that the height of nuts of different sizes placed in the corresponding first positioning hole 2 / second positioning hole 3 is approximately the same, preventing product bending caused by insufficient pressing height, gaps, or excessive pressing limits during pressing.

[0025] In this embodiment, the first positioning hole 2 corresponds to the nut of M3, the second positioning hole 3 corresponds to the nut of M5, and the difference between the distance between the bottom end of the first positioning hole 2 and the bottom end of the protrusion 4 and the distance between the bottom end of the second positioning hole 3 and the upper end face of the protrusion 4 is determined according to the height difference between the nut of M3 and the nut of M5.

[0026] The positioning post 1 and the protrusion 4 are integrally formed and are made of metal, preferably stainless steel or hard alloy.

[0027] like Figure 1 and Figure 2As shown, a rounded corner 5 is provided between the upper end face of the positioning post 1 and the side wall, and between the lower end face of the positioning post 1 and the side wall.

[0028] Furthermore, in this invention, since the nut is placed in the first positioning hole 2 / second positioning hole 3 during crimping, and the DC separator is located above the nut, the crimping machine directly presses onto the DC separator during crimping, resulting in a larger contact area and preventing deformation of the DC separator. In practice, the upper die is mounted on the crimping machine during crimping, and the upper die has a flat lower end face, which directly contacts the DC separator during crimping.

[0029] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above-described embodiment. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. A jig for direct current shunt sampling hole and nut crimping, characterized in that, The utility model relates to a positioning column (1), first positioning hole (2) and second positioning hole (3) are equipped with respectively on the upper and lower end surface of positioning column (1), first positioning hole (2) and second positioning hole (3) are adapted to the nut of different size respectively, the outer wall of positioning column (1) is equipped with protruding portion (4), the section of positioning column (1) is circular, the section of protruding portion (4) is circular ring shape and is closed along the circumference, the inner diameter of first positioning hole (2) is less than the inner diameter of second positioning hole (3), the interval between the bottom of first positioning hole (2) and the bottom of protruding portion (4) is greater than the interval between the bottom of second positioning hole (3) and the upper end surface of protruding portion (4).

2. The jig for DC shunt sampling hole and nut crimping according to claim 1, characterized in that, The protruding portion (4) is coaxially arranged with the positioning column (1).

3. The jig for DC shunt sampling hole and nut crimping according to claim 1, characterized in that, The positioning column (1) is made of metal.

4. The jig for DC shunt sampling hole and nut crimping of claim 1, wherein, The positioning column (1) is provided with a round corner (5) between the upper end surface and the side wall, and between the lower end surface and the side wall.

5. The jig for DC shunt sampling hole and nut crimping of claim 1, wherein, The first positioning hole (2) and the second positioning hole (3) are coaxially arranged.

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