Wiring terminal, switch and circuit breaker

Abstract

The utility model discloses a wiring terminal, a switch and a circuit breaker, comprising a pedestal and an assembling groove arranged on the pedestal, the assembling groove is a regular polygon groove and is matched with the head of a bolt or a nut, and at least the positions corresponding to the orientation of the two sides of the pedestal are straight edges. According to the utility model, the torsion bearing upper limit of the wiring terminal is higher, and the service life of the base is longer when a client performs wiring operation.

Description

Technical Field

[0001] The utility model relates to an electrical wiring terminal, in particular to a wiring terminal, a switch and a circuit breaker. Background Art

[0002] As the current switch devices are becoming smaller in size, the current switch devices have shrunk to very small sizes. This size change results in a weakening of the strength of the switch device housing.

[0003] Reference Figure 1 As shown, the utility model patent with prior art publication number CN215496586U discloses a wiring structure of a molded case circuit breaker. The prior art explains the current existing terminal structure. A nut is placed in a nut slot A1, and then the terminal contacts A2 are stacked and passed through a bolt A3 at the same time. The bolt is threadedly connected with a nut A4 so that the two contacts A2 are tightly contacted together.

[0004] Reference Figure 2 As shown in the figure, the structure of the nut slot B1 of the wiring terminal used in the prior art is shown. Under this structure, the torsional bearing capacity of the wiring terminal is weak, and the nut slot B1 (the base of the wiring terminal) of the wiring terminal is easily cracked due to tools or human factors during the wiring process.

[0005] Therefore, there is a need for a terminal block structure that can provide a greater torque bearing upper limit. Utility Model Content

[0006] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a wiring terminal, a switch and a circuit breaker, which can increase the upper limit of the torque bearing capacity of the wiring terminal and extend the service life of the base when the customer operates and uses it.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a wiring terminal, comprising a base and an assembly groove arranged on the base, wherein the assembly groove is a regular polygonal groove, which is adapted to the head of the bolt or the nut, and at least the positions corresponding to the two sides of the base are straight edges.

[0008] As a further improvement of the present invention, the assembly groove is provided with a clearance groove at a position corresponding to one or more corners thereof, and the corner with the clearance groove forms a height difference with the groove wall of the assembly groove through the clearance groove.

[0009] As a further improvement of the present invention, the corner corresponding to the clearance groove is set as a rounded corner, and the rounded corner is matched with the corner clearance of the corresponding bolt or nut.

[0010] As a further improvement of the present invention, there is at least one corner with the clearance groove located in the direction of the assembly groove corresponding to the base for wiring.

[0011] As a further improvement of the present invention, the assembly groove is a regular hexagon.

[0012] A switch is provided with a connection terminal as described in any one of the above-mentioned improved solutions.

[0013] A circuit breaker is provided with a connection terminal as described in any one of the above-mentioned improved solutions or a switch as described above.

[0014] As a further improvement of the utility model, one end of the base has an opening for the metal terminal to extend into; the positions of the two sides of the assembly groove corresponding to the opening are straight edges.

[0015] A circuit breaker is provided with the wiring terminal with rounded corners, and one end of the base has an opening for the metal terminal to extend into; at least one corner with the make way groove is located in the opening direction of the base corresponding to the assembly groove.

[0016] As a further improvement of the present invention, the positions on both sides of the assembly groove corresponding to the opening are straight edges.

[0017] The beneficial effect of the utility model is that the wall thickness of the assembly grooves on both sides of the base can be thicker, so that a greater torque can be carried, and the strength and life are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the wiring state of the wiring terminal in the prior art;

[0019] Figure 2 It is a schematic diagram of the assembly slot structure in the prior art;

[0020] Figure 3 This is a schematic diagram of the base structure of the utility model;

[0021] Figure 4 for Figure 3 A magnified schematic diagram of part A in FIG.

[0022] Figure 5 It is a three-dimensional schematic diagram of the base structure of the utility model;

[0023] Figure 6 It is a structural schematic diagram of a nut installed in an assembly groove of the utility model;

[0024] Figure 7 It is a structural schematic diagram of installing bolts in the assembly groove of the utility model.

[0025] Figure numbers: A1, nut groove; A2, contact piece; A3, bolt; A4, nut; B1, nut groove; 1, base; 2, assembly groove; 3, clearance groove; 4, bolt; 5, nut; 6, fillet; 7, opening. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0027] Reference Figure 1-7 As shown,

[0028] A terminal block includes a base 1 and a mounting groove 2 arranged on the base 1, wherein the mounting groove 2 is a regular polygonal groove and is adapted to the head of a bolt 4 or a nut 5 (refer to Figure 6 and 7 As shown), and at least the positions corresponding to the two sides of the base 1 are straight edges. Figure 3 Take the left and right sides as an example.

[0029] The assembly groove 2 is a regular polygon, which can be a square or a regular hexagon, preferably a regular hexagon, which can meet the standards of bolts 4 and nuts 5 in the market, making it easy to select bolts 4 and nuts 5 for assembly.

[0030] Reference Figure 2 As shown, this solution is a prior art, and the position of the assembly groove 2 corresponding to the two sides of the base 1 is a corner, which will lead to a larger volume of the lateral hollowing, resulting in the problem of weakening the strength of the base 1, so that the base 1 will crack due to improper human or tool operation. Moreover, under this structure, even if the size of the assembly groove 2 is reduced, this problem still exists.

[0031] The structure adopted in this solution rotates the horizontal direction of the assembly groove 2 so that the straight sides of the assembly groove 2 correspond to the two sides of the base 1. At this time, the length of the holes on both sides becomes shorter, and the strength can be improved. The size of the assembly groove 2 can be reduced. For example, the original assembly groove 2 is adapted to the nut 5 of M8 specification, which can be adjusted to M6 specification. At this time, the strength of the base 1 on both sides is improved. And due to the change in the specification of the assembly groove 2, the thickness on both sides will be further increased. If the shape of the assembly groove 2 is square, such as a steel sheet, with a hole drilled in the middle and a thread set, its specifications can be set with reference to the M6 ​​specification of the regular hexagon, and the square specification is set with the diagonal length of the regular hexagon as the side length. Of course, it is more preferred to use a regular hexagon, which can further reduce the hollowed volume.

[0032] By adopting a regular hexagon and reducing its specifications, the length of the diagonal can be shortened in disguise. However, this shortening of the diagonal length is not obvious enough in the directions of both sides of the base 1, but it will be more obvious in the longitudinal direction of the base 1. Figure 3As shown, the base 1 can maintain good lateral and longitudinal strength.

[0033] In addition, refer to Figure 1 As shown in the figure, the wiring terminal and the metal terminal in the embodiment of the molded case circuit breaker are connected and energized. Figure 1 The right side of the housing extends into the base 1, and cooperates with the bolt 4 and the nut 5 to abut against the contact inside the circuit breaker for conduction.

[0034] from Figure 3 In the middle, the lower part of the base 1 is inserted (the base 1 is used for wiring). For the convenience of installation, the bolt 4 is generally closer to the lower part of the figure, so the base 1 is thinner at the lower part, and the corner of the assembly groove 2 will also correspond to the lower part of the base 1, in order to further improve the strength of this position. The corner of the assembly groove 2 corresponding to this position is provided with a clearance groove 3, and the corner with the clearance groove 3 forms a height difference with the groove wall of the assembly groove 2 through the clearance groove 3.

[0035] At this time, the head of the nut 5 or the bolt 4 is installed in the assembly groove 2, and the position of the corresponding give way groove 3 will not contact the nut 5 or the bolt 4, thereby preventing the position from being directly subjected to force, thereby overcoming the problem that the thinner position on the base 1 is prone to cracking due to force.

[0036] Of course, the above-mentioned clearance groove 3 is only one of the preferred implementations. The number of the clearance groove 3 can be one or more, and can be set at a desired position, which can be a position where the wall thickness of the base 1 is thinner or a position where the wall thickness is thicker.

[0037] In order to further improve the strength, the corner corresponding to the clearance groove 3 is set as a rounded corner 6, and the rounded corner 6 is matched with the corner clearance of the corresponding bolt 4 or nut 5.

[0038] Reference Figure 4 As shown, the setting of the fillet 6 helps to increase the wall thickness of the position corresponding to the assembly groove 2 on the base 1. Of course, the setting of the fillet 6 also needs to maintain a clearance fit between the fillet 6 and the corresponding bolt 4 or nut 5 to avoid contact between the fillet 6 and the bolt 4 and nut 5.

[0039] The description of the above structure is explained with the wiring terminal as the main body, and the wiring terminal can be used in switches, such as contactors, protectors and other switching devices that need to be connected to copper busbars (metal terminals).

[0040] Of course, it can also be used in a circuit breaker, and the above-mentioned wiring terminals or switches can be directly set in the circuit breaker.

[0041] When the main body is a circuit breaker (refer to Figure 6 and 7As shown in the figure, the base 1 will have an opening 7, which is used for the metal terminal (copper busbar conductor) to extend into and contact the contact at the position of the opening 7 for electrical conduction. At the same time, the metal terminal and the contact are clamped by the bolt 4 and the nut 5 to achieve stable electrical conduction. At this time, the straight edges on both sides of the assembly groove 2 correspond to the two sides of the opening 7, which can improve the strength of the two sides of the opening 7. The two sides of the opening 7 refer to the reference Figure 3 The left and right sides of the .

[0042] In addition, the position of the paving groove 3 can be made to correspond to the direction of the opening 7. At this time, the paving groove 3 corresponds to the opening 7 with a thinner wall thickness, which can increase the torque that the base 1 can bear, and prevent the outer wall of the nut 5 or the bolt 4 from directly contacting the paving groove 3, thereby preventing the opening 7 with a thinner wall thickness from being subjected to excessive force and cracking.

[0043] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A terminal block, comprising a base and an assembly groove arranged on the base, characterized in that: The assembly groove is a regular polygonal groove, which is matched with the head of the bolt or the nut, and at least the positions corresponding to the two sides of the base are straight edges.

2. The connection terminal according to claim 1, characterized in that: The assembly groove is provided with a clearance groove at a position corresponding to one or more corners thereof, and the corner with the clearance groove forms a height difference with the groove wall of the assembly groove through the clearance groove.

3. The connection terminal according to claim 2, characterized in that: The corner corresponding to the clearance groove is set as a rounded corner, and the rounded corner is matched with the corner clearance of the corresponding bolt or nut.

4. The connection terminal according to claim 2, characterized in that: There is at least one corner with the clearance groove located in the direction of the base corresponding to the assembly groove for wiring.

5. The connection terminal according to any one of claims 1 to 4, characterized in that: The assembly groove is a regular hexagon.

6. A switch, characterized in that: The switch is provided with a connection terminal as described in any one of claims 1 to 5.

7. A circuit breaker, characterized in that: The circuit breaker is provided with a connection terminal as described in any one of claims 1 to 5 or a switch as described in claim 6.

8. The circuit breaker according to claim 7, characterized in that: One end of the base is provided with an opening for the metal terminal to extend into; the positions of the two sides of the assembly groove corresponding to the opening are straight edges.

9. A circuit breaker, characterized in that: The circuit breaker is provided with the terminal as claimed in claim 3, and one end of the base has an opening for the metal terminal to extend into; there is at least one corner with the clearance groove located in the opening direction of the base corresponding to the assembly groove.

10. The circuit breaker according to claim 9, characterized in that The positions of the assembly groove corresponding to the two sides of the opening are straight edges.

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