Fixing structure of switching device terminal

Abstract

The utility model relates to a fixing structure of a switch electric appliance terminal, which comprises a switch electric appliance shell, a terminal metal piece and an external conductor metal piece, one end of the external conductor metal piece extends into the shell and is connected with the terminal metal piece through a bolt, and a bolt limiting mechanism is arranged in the shell. The bolt limiting mechanism is used for limiting movement of the bolt. Compared with the prior art, the bolt limiting mechanism is arranged in the shell, the terminal metal piece and the external conductor metal piece are fixed in a reinforced mode, deformation caused by stress can be avoided, and safety and stability of the switch are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of switchgear field, in particular to a kind of fixing structure of switchgear terminal. BACKGROUND

[0002] In power system, circuit breaker as key circuit protection equipment, its performance and reliability are crucial to ensure the stable operation of power system. In recent years, with the wide application of modular design concept in power equipment manufacturing, left and right assembly, modularized circuit breaker is favored because of its convenient installation, maintenance and upgrading features.

[0003] In prior art circuit breaker, conductive system is usually directly assembled in the positioning groove of module shell. This design enables the shape of shell and the shape of conductive part to be mutually adaptable, and a certain gap is reserved between the two to facilitate the assembly and adjustment of conductive system. However, this design has the following problems in actual application: the original intention of reserving gap is to facilitate the assembly of conductive system, but in actual use, it is difficult to effectively control the gap size between conductive system and shell. In the process of wiring, cable conductor often generates a certain pulling force on wiring terminal; when this pulling force is too large, wiring terminal may be warped and deformed due to uneven stress. The warping and deformation of wiring terminal not only affects the contact reliability of circuit breaker and reduces its conductive performance, but also may adversely affect the protection characteristics of switchgear. In extreme cases, these problems may even cause circuit failure or safety accident, posing a serious threat to the stable operation of power system. SUMMARY

[0004] The purpose of the utility model is to overcome the defects of the prior art and provide a fixing structure of switchgear terminal to improve the stability and reliability of wiring terminal.

[0005] The purpose of the utility model can be achieved by the following technical solutions:

[0006] A fixing structure of switchgear terminal, comprising a shell of switchgear, a terminal metal piece and an external conductor metal piece, one end of the external conductor metal piece extends into the shell and is connected to the terminal metal piece by a bolt, a bolt limiting mechanism is provided in the shell, which is used to limit the movement of the bolt, and in turn limit the movement of the terminal metal piece and the external conductor metal piece.

[0007] Further, the bolt limiting mechanism is provided with a threaded hole, and the bolt passes through the external conductor metal piece and the terminal metal piece to connect the threaded hole.

[0008] Further, the bolt limiting mechanism comprises a nut cavity, and the wiring nut is fixed in the nut cavity, and the bolt passes through the external conductor metal piece and the terminal metal piece to connect the wiring nut.

[0009] Further, the terminal metal piece is provided with a first connecting part, the inside of the shell is provided with a second connecting part, and the first connecting part and the second connecting part limit each other to limit the movement of the terminal metal piece relative to the shell.

[0010] Further, the first connecting part and the second connecting part are a boss and a groove.

[0011] Further, the first connecting part and the second connecting part are snap-connected with each other.

[0012] Further, the first connecting part is symmetrically arranged on both sides of the terminal metal piece.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1、The utility model discloses a bolt limiting mechanism is arranged in the shell, and the terminal metal piece and the external conductor metal piece are strengthened and fixed, can avoid the deformation of stress, improves the safety and stability of switch.

[0015] 2、The bolt limiting mechanism directly adopts a threaded hole, and the structure is simple, and the equipment is simple.

[0016] 3、The bolt limiting mechanism is used for limiting the wiring nut, and the structural strength is high, and the reliability is better.

[0017] 4、The connecting part that cooperates with the shell is arranged on the terminal metal piece, and the fixed further strengthens, improves the anti -new ability, promotes stability and reliability.

[0018] 5、The connecting part on the terminal metal piece is symmetrically arranged on the left and right, and the stress is uniform and stable. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the structural schematic diagram of the utility model.

[0020] Figure 2 It is the partial explosion schematic diagram of example one.

[0021] Figure 3 It is the partial explosion schematic diagram of example two.

[0022] REFERENCE SIGNS:

[0023] 1-terminal metal part; 2-external conductor metal part; 3-bimetallic element; 4-static contact conductive plate; 5-bolt; 6-wire nut; 7-housing; 8-nut cavity; 9-first connecting part; 10-second connecting part; 11-bump; 12-threaded hole. DETAILED DESCRIPTION

[0024] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0025] Example 1

[0026] like Figure 1 As shown, this embodiment provides a fixing mechanism for a terminal block of a switching device. The switching device can be a circuit breaker, a transfer switch, a relay, a contactor, etc. In this embodiment, a circuit breaker is used. The specific structure of the terminal block includes a terminal metal member 1, an external conductor metal member 2, a bimetallic element 3, a static contact conductive plate 4, a bolt 5, and a terminal nut 6. Within the circuit breaker housing 7, the static contact conductive plate 4 is connected to the terminal metal member 1 via the bimetallic element 3. The terminal metal member 1 is provided with a through hole. The external conductor metal member 2 is inserted into the circuit breaker through the opening of the housing 7. The insertion end of the external conductor metal member 2 is also provided with a through hole. Typically, the terminal metal member 1 and the external conductor metal member 2 are connected via a bolt 5. That is, the bolt 5 is sequentially passed through the through holes of the external conductor metal member 2 and the terminal metal member 1, and then tightened with the terminal nut 6 to complete the fixed connection between the external conductor metal member 2 and the terminal metal member 1. At this time, the connection is in a semi-suspended state. If the external conductor metal member 2 is pulled up by external force, the terminal metal member 1 can easily be twisted or deformed, thereby affecting the entire circuit connection. Therefore, in this embodiment, a bolt limiting mechanism is provided in the housing 7 of the circuit breaker to limit the movement of the bolt 5 , thereby limiting the movement of the terminal metal member 1 and the external conductor metal member 2 .

[0027] The bolt limit mechanism is as follows Figure 2 As shown, the circuit breaker housing 7 includes a nut cavity 8. The circuit breaker housing 7 is composed of two left and right shell components, each with structural features on the inside. When closed, the nut cavity 8 is formed. During installation, the terminal nut 6 is first secured within the nut cavity 8. Then, the outer conductor metal component 2 is inserted. Bolts 5 are threaded through the outer conductor metal component 2 and the terminal metal component 1 and into the terminal nut 6 to complete the securement.

[0028] In the embodiment, the first connecting part 9 is arranged on the terminal metal piece 1, the second connecting part 10 is arranged on the inside of the shell 7, the first connecting part 9 and the second connecting part 10 limit each other to limit the movement of the terminal metal piece 1 relative to the shell 7, strengthen the fixation, and improve the anti-torque capacity. The first connecting part 9 and the second connecting part 10 can limit each other as long as they can limit each other, and the specific structure is not limited, which can be a conventional buckle structure or a convex and concave structure that fits each other. In the embodiment, the convex and concave structure is preferably adopted. As shown in FIG. 6, Figure 2 two terminal convexes are arranged on the left and right sides of the terminal metal piece 1, that is, the first connecting part 9, which are symmetrical to each other. The corresponding terminal concaves, that is, the second connecting part 10, are arranged on the inside of the shell 7. During assembly, the terminal convexes on the two sides of the terminal metal piece 1 are inserted into the terminal concaves to complete the fixation. In other embodiments, the terminal concaves and the terminal convexes can be semicircular, triangular, trapezoidal, etc.; one, two, three or four terminal convexes can be arranged on each side of the terminal metal piece 1; and the number of terminal concaves is correspondingly arranged.

[0029] Embodiment two

[0030] The basic structure of the embodiment is the same as that of the first embodiment, and the difference lies in that, as shown in FIG. 7, Figure 3 the structure does not arrange the terminal nut, but a convex block 11 arranged on the inside of the shell 7 is arranged on the bolt limiting mechanism, and a threaded hole 12 is directly arranged on the convex block 11 to be connected with the bolt 5. In order to improve the strength, in other embodiments, the convex block 11 itself can be a metal structure or can be embedded with a threaded hole 12.

[0031] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model.

[0032] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0033] In the present application, unless otherwise expressly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; 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; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise expressly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] In the present application, unless otherwise expressly specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0035] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only embodiment.

[0036] The above detailed the preferred embodiments of the present application. It should be understood that those skilled in the art can make many modifications and changes without creative labor according to the concept of the present application. Therefore, any technical solution obtained by logical analysis, reasoning or limited experiment based on the existing technology according to the concept of the present application shall be within the protection scope determined by the claims.

Claims

1. A fixing structure for a terminal of a switching device, comprising a housing (7) of the switching device, a terminal metal part (1) and an external conductor metal part (2), wherein one end of the external conductor metal part (2) extends into the housing (7) and is connected to the terminal metal part (1) via a bolt (5), characterized in that: A bolt limiting mechanism is provided in the housing (7), and is used to limit the movement of the bolt (5), thereby limiting the movement of the terminal metal part (1) and the external conductor metal part (2).

2. A fixing structure for a switch terminal according to claim 1, characterized in that: The bolt limiting mechanism is provided with a threaded hole, and the bolt (5) passes through the external conductor metal part (2) and the terminal metal part (1) to connect the threaded hole (12).

3. The fixing structure of a switch terminal according to claim 1, characterized in that: It also includes a wiring nut (6), the bolt limiting mechanism includes a nut cavity (8), the wiring nut (6) is fixed in the nut cavity, and the bolt (5) passes through the external conductor metal part (2) and the terminal metal part (1) to connect the wiring nut (6).

4. The fixing structure of a switch terminal according to claim 1, characterized in that: The terminal metal part (1) is provided with a first connecting portion (9), and the inner side of the housing (7) is provided with a second connecting portion (10). The first connecting portion (9) and the second connecting portion (10) are mutually limited to restrict the movement of the terminal metal part (1) relative to the housing (7).

5. The fixing structure of a switch terminal according to claim 4, characterized in that: The first connecting portion (9) and the second connecting portion (10) are mutually a boss and a groove.

6. The fixing structure of a switch terminal according to claim 4, characterized in that: The first connecting portion (9) and the second connecting portion (10) are snap-connected to each other.

7. The fixing structure of a switch terminal according to claim 4, characterized in that: The first connecting portion (9) is symmetrically arranged on both sides of the terminal metal piece (1).

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