Flow divider with pressing rivet nuts

Abstract

A diverter with pressing rivet nuts comprises a horizontally-arranged rectangular manganese copper plate, horizontally-arranged rectangular red copper plates are symmetrically welded to the left side and the right side of the manganese copper plate, and the two red copper plates are the same in size and are correspondingly flush with the front side and the rear side of the manganese copper plate. First through holes vertically penetrating through the red copper plates are symmetrically formed in the positions, close to the manganese copper plate in the left-right direction, of the two red copper plates, second through holes vertically penetrating through the red copper plates are symmetrically formed in the positions, away from the manganese copper plate in the left-right direction, of the two red copper plates, and the manganese copper plate is flush with the lower side faces of the two red copper plates. The upper side face of the manganese-copper plate is lower than the upper side face of the red copper plate, and the position, corresponding to the first through hole, of the upper side of each red copper plate is provided with a pressing rivet nut fixed to the first through hole. The device can prevent the exposed part of the wire and the conductive joint from being mistakenly touched with the manganese-copper plate, the sampling resistance consistency is high, and the service life of the thread is long.

Description

Technical Field

[0001] The utility model relates to a shunt with a rivet nut. Background Art

[0002] A shunt is an essential component in intelligent circuit breakers, power supplies, disconnectors, and test instruments. For its mechanical structure, reference can be made to Chinese Patent CN208270633U. Generally, a manganese copper plate is used as the resistance material, and copper plates are welded on both sides of the manganese copper plate for current access, and sampling is carried out near the manganese copper plate. In the prior art, wiring holes for current access are provided on the outer sides where the two copper plates are far away from each other, and threaded holes for sampling are provided near the manganese copper plate. The problems existing in the prior art are as follows:

[0003] 1. Since the closer the threaded hole for sampling is to the manganese copper plate, the lower the temperature drift and the smaller the error, when manufacturing the shunt, it is generally set as close as possible to the manganese copper plate. However, during sampling, the exposed part of the wire and the conductive joint at the end of the wire are very likely to make accidental contact with the manganese copper plate, resulting in a change in resistance value. To solve this problem, the prior art generally leaves a sufficient safety distance between the threaded hole and the manganese copper plate, which affects the measurement accuracy;

[0004] 2. The hardness of copper is limited. When tapping threads on copper to make threaded holes, the thread life is limited, and it is easy to cause an increase in the rejection rate due to thread slipping.

[0005] 3. When different users sample, the shapes and sizes of the conductive joints at the ends of the wires are different. If they are directly attached to the copper plate for contact sampling, it will cause differences in the measured resistance values due to different contact areas between the conductive joints and the copper plate, and it is impossible to ensure the consistency between the test results during the production stage and the resistance values measured during actual use by users. Summary of the Utility Model

[0006] The technical problem to be solved by the utility model is to provide a shunt with a rivet nut, which can prevent accidental contact between the exposed part of the wire and the conductive joint and the manganese copper plate, has high consistency in sampling resistance values, and has a long thread life.

[0007] To solve the above technical problems, the utility model provides a shunt with a press riveting nut, which includes a rectangular manganese copper plate arranged horizontally. Rectangular copper plates are symmetrically welded to both the left and right sides of the manganese copper plate. The two copper plates are of the same size and are flush with the front and back sides of the manganese copper plate. Along the left - right direction, symmetrically arranged first through - holes penetrating the copper plates vertically are provided near the manganese copper plate on both copper plates. Along the left - right direction, symmetrically arranged second through - holes penetrating the copper plates vertically are provided far from the manganese copper plate on both copper plates. The lower side of the manganese copper plate is flush with the lower sides of the two copper plates, and the height of the upper side of the manganese copper plate is lower than the height of the upper side of the copper plates. At the position corresponding to the first through - hole on the upper side of each copper plate, a press riveting nut fixed to the first through - hole is provided.

[0008] Advantages of the utility model:

[0009] 1. Using a press riveting nut can make the sampling point infinitely close to the connection between the manganese copper plate and the copper plate, thus obtaining a smaller temperature drift performance. During sampling, the conductive joint only contacts the upper side of the press riveting nut. Since the upper side of the press riveting nut protrudes from the copper plate, and the height of the upper side of the manganese copper plate is lower than the height of the upper side of the copper plate, in this way, during sampling, the exposed part of the wire and the conductive joint at the end of the wire will not contact the manganese copper plate.

[0010] 2. The press riveting nut is generally made of stainless steel. Compared with copper, it has higher hardness, longer thread life, is not easy to slip, and extends the service life of the shunt.

[0011] 3. Since during sampling, the conductive joint only contacts the upper side of the press riveting nut, and the area of the upper side of the press riveting nut is certain, when conductive joints of different shapes and sizes contact the upper side of the press riveting nut, the actual contact area is always constant (when in use, the conductive joint generally completely covers the press riveting nut). In this way, it can ensure that the measured resistance value during actual use by the user is highly consistent with the test result when the shunt leaves the factory. Description of the drawings

[0012] Figure 1 is the structural schematic diagram of the utility model. Detailed implementation mode

[0013] See Figure 1, A diverter with a press riveting nut 5, which includes a horizontally arranged rectangular manganese copper plate 1. Horizontally arranged rectangular copper plates 2 are symmetrically welded to both the left and right sides of the manganese copper plate 1. The two copper plates 2 are of the same size and are flush with the front and back sides of the manganese copper plate 1. Along the left-right direction, at positions where the two copper plates 2 are close to the manganese copper plate 1, first through holes 4 vertically penetrating the copper plates 2 are symmetrically provided. Along the left-right direction, at positions where the two copper plates 2 are far from the manganese copper plate 1, second through holes 3 vertically penetrating the copper plates 2 are symmetrically provided. The lower side surfaces of the manganese copper plate 1 and the two copper plates 2 are flush, and the height of the upper side surface of the manganese copper plate 1 is lower than the height of the upper side surface of the copper plate 2. At the upper side position of each copper plate 2 corresponding to the first through hole 4, a press riveting nut 5 fixed to the first through hole 4 is provided.

Claims

1. A flow divider with a rivet nut, comprising a horizontally arranged rectangular manganese copper plate, with horizontally arranged rectangular copper plates symmetrically welded on both sides of the manganese copper plate, the two copper plates have the same size and are flush with the front and rear sides of the manganese copper plate, the two copper plates are symmetrically provided with first through holes penetrating the copper plates in the vertical direction near the manganese copper plates in the left and right directions, and the two copper plates are symmetrically provided with second through holes penetrating the copper plates in the vertical direction away from the manganese copper plates in the left and right directions, characterized in that: The manganese copper plate is flush with the lower sides of the two copper plates, the upper side height of the manganese copper plate is lower than the upper side height of the copper plate, and a rivet nut fixed to the first through hole is provided at the upper position of each copper plate corresponding to the first through hole.

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