Resistance-reducing connection structure for busbar and contact of circuit breaker

Abstract

The utility model relates to the technical field of circuit breaker production, in particular to a resistance reduction connecting structure of a busbar and a contact of a circuit breaker, which is reasonable in structural design and comprises the busbar, a connecting plate and a contact assembly, and the contact assembly comprises an installation support, a transverse straight plate spring, a longitudinal comb-type plate spring and a longitudinal comb-type contact plate. Wherein the transverse straight plate spring, the longitudinal comb-type plate spring and the longitudinal comb-type contact plate are connected with the mounting bracket into a whole through the second fastener, and all the parts are cooperated, on one hand, the longitudinal comb-type contact plate in the contact assembly is directly clamped and fixed with the busbar through the connecting plate and the first fastener, and the advantages of relatively small resistance and relatively good guiding performance are achieved; and on the other hand, the contact assembly and the busbar are connected conveniently, and the stability of the connected structure is high.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breaker production, in particular to a resistance-reducing connection structure for a circuit breaker busbar and a contact. Background Technique

[0002] A circuit breaker refers to a switching device that can close, carry, and break the current under normal circuit conditions and can close, carry, and break the current under abnormal circuit conditions within a specified time. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their application scope. The boundary between high and low voltages is relatively blurred. Generally, those above 3 kV are called high-voltage electrical appliances. Circuit breakers can be used to distribute electric energy, start asynchronous motors infrequently, protect power supply lines and motors, etc. When they encounter serious overload, short circuit, undervoltage and other faults, they can automatically cut off the circuit. Its function is equivalent to the combination of a fuse switch and an over- and under-thermal relay; and generally no parts need to be changed after breaking the fault current.

[0003] It is found that there are deficiencies in the connection structure of the traditional circuit breaker busbar and contact during use. One is that it cannot achieve direct contact between the busbar and the contact, resulting in problems such as high resistance and unsatisfactory electrical conductivity; the other is that its connection operation is cumbersome and the connection reliability is not ideal. Therefore, it is necessary to optimize and improve the connection structure of the traditional circuit breaker busbar and contact. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the above problems existing in the traditional technology and provide a resistance-reducing connection structure for a circuit breaker busbar and a contact.

[0005] To achieve the above technical purpose and reach the above technical effect, the utility model is realized through the following technical solutions:

[0006] A resistance-reducing connection structure for a circuit breaker busbar and a contact, comprising a busbar, a connecting plate and a contact assembly. The busbar is connected to the contact assembly through the connecting plate and a first fastener;

[0007] The busbar is composed of a first block part and a second block part. A contact plate clamping groove is formed between the first block part and the second block part. A plurality of first mounting holes are formed in the first block part along the thickness direction, and a plurality of second mounting holes are formed in the second block part along the thickness direction;

[0008] The contact assembly includes a mounting bracket, a transverse straight plate spring, a longitudinal comb-shaped plate spring, and a longitudinal comb-shaped contact plate. Two groups of symmetrically distributed longitudinal comb-shaped contact plates are mounted on the mounting bracket. A longitudinal comb-shaped plate spring is abutted against the outside of each group of longitudinal comb-shaped contact plates. A transverse straight plate spring is abutted against the outside of the longitudinal comb-shaped plate spring. The transverse straight plate spring, the longitudinal comb-shaped plate spring, and the longitudinal comb-shaped contact plate are connected to the mounting bracket as a whole through a second fastener.

[0009] Further, in the resistance reduction connection structure of the breaker bus bar and the contact, the connecting plate is an angular plate composed of a horizontal plate portion and a vertical plate portion. A third mounting hole corresponding to the position of the second mounting hole is provided on the horizontal plate portion, and a fourth mounting hole facilitating connection with the breaker frame is provided on the vertical plate portion.

[0010] Further, in the resistance reduction connection structure of the breaker bus bar and the contact, the mounting bracket includes vertical side plates, a support frame, and a transverse connecting bolt. There are two vertical side plates arranged in parallel. A support frame is installed between the middles of the two vertical side plates. Fifth mounting holes for cooperating with the second fastener are symmetrically provided on the upper and lower plates of the support frame, and a transverse connecting bolt is installed between the ends of the two vertical side plates.

[0011] Further, in the resistance reduction connection structure of the breaker bus bar and the contact, sixth mounting holes for cooperating with the second fastener are provided on the transverse straight leaf spring and the longitudinal comb-shaped leaf spring.

[0012] Further, in the resistance reduction connection structure of the breaker bus bar and the contact, a seventh mounting hole for cooperating with the second fastener is provided at the front of the longitudinal comb-shaped contact plate, and an eighth mounting hole corresponding to the position of the second mounting hole is provided at the rear of the longitudinal comb-shaped contact plate. The second mounting hole, the third mounting hole, and the eighth mounting hole are respectively in cooperation with the first fastener.

[0013] Further, in the resistance reduction connection structure of the breaker bus bar and the contact, the part of the longitudinal comb-shaped contact plate where the eighth mounting hole is located is a straight clamping section facilitating its clamping into the contact plate clamping groove.

[0014] The beneficial effects of the present utility model are as follows:

[0015] The structure of the present utility model is reasonably designed. It includes a bus bar, a connecting plate, and a contact assembly. The contact assembly includes a mounting bracket, a transverse straight leaf spring, a longitudinal comb-shaped leaf spring, and a longitudinal comb-shaped contact plate. Among them, the transverse straight leaf spring, the longitudinal comb-shaped leaf spring, and the longitudinal comb-shaped contact plate are integrated with the mounting bracket through the second fastener. Each component cooperates with each other. On the one hand, the longitudinal comb-shaped contact plate in the contact assembly is directly clamped and fixed to the bus bar by using the connecting plate and the first fastener, having the advantages of small resistance and good guiding performance. On the other hand, the connection operation between the contact assembly and the bus bar is convenient, and the structural stability after connection is relatively high.

[0016] Of course, it is not necessary for any product implementing the present utility model to achieve all the above advantages simultaneously. Description of the Drawings

[0017] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the attached drawings required for the description of the embodiments. Obviously, the attached drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other attached drawings can also be obtained based on these drawings.

[0018] Figure 1 is a three-dimensional structural schematic diagram of the whole of the present utility model;

[0019] Figure 2 is a front view structural schematic diagram of the whole of the present utility model;

[0020] Figure 3 is a top view structural schematic diagram of the whole of the present utility model;

[0021] Figure 4 is a structural schematic diagram of the busbar in the present utility model;

[0022] Figure 5 is a structural schematic diagram of the connecting plate in the present utility model;

[0023] Figure 6 is a structural schematic diagram of the contact component in the present utility model;

[0024] Figure 7 is a structural schematic diagram of the mounting bracket in the present utility model;

[0025] Figure 8 is a position distribution schematic diagram of the lateral straight leaf spring, longitudinal comb-shaped leaf spring, and longitudinal comb-shaped contact plate on the same side in the present utility model;

[0026] In the attached drawings, the components represented by each reference numeral are described as follows:

[0027] 1 - busbar, 101 - first block part, 102 - second block part, 103 - contact plate clamping groove, 104 - first mounting hole, 105 - second mounting hole, 2 - connecting plate, 201 - cross plate part, 202 - vertical plate part, 203 - third mounting hole, 204 - fourth mounting hole, 3 - mounting bracket, 301 - vertical side plate, 302 - support frame, 303 - fifth mounting hole, 304 - transverse connecting bolt, 4 - lateral straight leaf spring, 5 - longitudinal comb-shaped leaf spring, 6 - longitudinal comb-shaped contact plate. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0029] As Figures 1 - 8 shown, this embodiment provides a resistance-reducing connection structure for a circuit breaker busbar and a contact, including a busbar 1, a connecting plate 2, and a contact assembly. The busbar 1 is connected to the contact assembly through the connecting plate 2 and a first fastener.

[0030] In this embodiment, the busbar 1 is composed of a first block portion 101 and a second block portion 102. A contact plate clamping groove 103 is formed between the first block portion 101 and the second block portion 102. A plurality of first mounting holes 104 are formed in the first block portion 101 along the thickness direction, and a plurality of second mounting holes 105 are formed in the second block portion 102 along the thickness direction.

[0031] In this embodiment, the connecting plate 2 is an angular plate composed of a horizontal plate portion 201 and a vertical plate portion 202. Third mounting holes 203 corresponding to the positions of the second mounting holes 105 are formed in the horizontal plate portion 201, and fourth mounting holes 204 convenient for connecting with the circuit breaker frame are formed in the vertical plate portion 202.

[0032] In this embodiment, the contact assembly includes a mounting bracket 3, a horizontal straight leaf spring 4, a longitudinal comb-shaped leaf spring 5, and a longitudinal comb-shaped contact plate 6. Two groups of symmetrically distributed longitudinal comb-shaped contact plates 6 are mounted on the mounting bracket 3. A longitudinal comb-shaped leaf spring 5 is abutted against the outside of each group of longitudinal comb-shaped contact plates 6, and a horizontal straight leaf spring 4 is abutted against the outside of the longitudinal comb-shaped leaf spring 5. The horizontal straight leaf spring 4, the longitudinal comb-shaped leaf spring 5, and the longitudinal comb-shaped contact plate 6 are connected into one body with the mounting bracket 3 through a second fastener.

[0033] In this embodiment, the mounting bracket 3 includes vertical side plates 301, a support frame 302, and a horizontal connecting bolt 304. There are two vertical side plates 301 and they are arranged in parallel. A support frame 302 is mounted between the middles of the two vertical side plates 301. Fifth mounting holes 303 for cooperating with the second fastener are symmetrically formed in the upper and lower plates of the support frame 302, and a horizontal connecting bolt 304 is mounted between the ends of the two vertical side plates 301.

[0034] In this embodiment, sixth mounting holes for cooperating with the second fastener are formed in the horizontal straight leaf spring 4 and the longitudinal comb-shaped leaf spring 5.

[0035] In this embodiment, a seventh mounting hole for cooperating with the second fastener is provided at the front of the longitudinal comb-shaped contact plate 6, and an eighth mounting hole corresponding to the position of the second mounting hole is provided at the rear of the longitudinal comb-shaped contact plate 6. The second mounting hole, the third mounting hole 203, and the eighth mounting hole are respectively in cooperation with the first fastener.

[0036] In this embodiment, the part of the longitudinal comb-shaped contact plate 6 where the eighth mounting hole is located is a straight clamping section that facilitates clamping it into the contact plate clamping groove 103.

[0037] A specific application of this embodiment is as follows: The resistance reduction connection structure of the breaker busbar and the contact provided in this embodiment includes a busbar 1, a connecting plate 2, and a contact assembly. The busbar 1 is connected to the contact assembly through the connecting plate 2 and the first fastener; the contact assembly includes a mounting bracket 3, a transverse straight leaf spring 4, a longitudinal comb-shaped leaf spring 5, and a longitudinal comb-shaped contact plate 6. The transverse straight leaf spring 4, the longitudinal comb-shaped leaf spring 5, and the longitudinal comb-shaped contact plate 6 are integrated into one body with the mounting bracket 3 through the second fastener. Each component cooperates with each other. On the one hand, the longitudinal comb-shaped contact plate 6 in the contact assembly is directly clamped and fixed to the busbar 1 by using the connecting plate 2 and the first fastener, which has the advantages of small resistance and good guiding performance; on the other hand, the connection operation between the contact assembly and the busbar 1 is convenient, and the structural stability after connection is relatively high.

[0038] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to only the specific implementation manners. Obviously, according to the content of this specification, many modifications and variations can be made. This specification selects and specifically describes these embodiments to better explain the principle and practical application of the present invention, so that those skilled in the relevant technical field can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A resistance-reducing connection structure for a circuit breaker busbar and contacts, characterized in that It includes a busbar, a connecting plate and a contact component, and the busbar is connected to the contact component through the connecting plate and the first fastener; The busbar is composed of a first block part and a second block part. A contact plate clamping groove is formed between the first block part and the second block part. A plurality of first mounting holes are formed in the first block part along the thickness direction, and a plurality of second mounting holes are formed in the second block part along the thickness direction; The contact component includes a mounting bracket, a transverse straight leaf spring, a longitudinal comb-shaped leaf spring, and a longitudinal comb-shaped contact plate. Two groups of symmetrically distributed longitudinal comb-shaped contact plates are mounted on the mounting bracket. A longitudinal comb-shaped leaf spring is abutted and arranged on the outer side of each group of longitudinal comb-shaped contact plates. A transverse straight leaf spring is abutted and arranged on the outer side of the longitudinal comb-shaped leaf spring. The transverse straight leaf spring, the longitudinal comb-shaped leaf spring, and the longitudinal comb-shaped contact plate are connected into a whole through the second fastener and the mounting bracket.

2. The resistance reduction connection structure of the breaker busbar and contact according to claim 1, wherein, The connecting plate is an angular plate composed of a transverse plate part and a vertical plate part. A third mounting hole corresponding to the position of the second mounting hole is formed in the transverse plate part, and a fourth mounting hole convenient for connecting with the circuit breaker frame is formed in the vertical plate part.

3. The resistance reduction connection structure of the breaker busbar and the contact according to claim 2, characterized in that, The mounting bracket includes vertical side plates, a support frame and a transverse connecting bolt. There are two vertical side plates and they are arranged in parallel. A support frame is mounted between the middles of the two vertical side plates. Fifth mounting holes matched with the second fastener are symmetrically formed in the upper and lower plates of the support frame. A transverse connecting bolt is mounted between the ends of the two vertical side plates.

4. The resistance reduction connection structure of the breaker bus bar and the contact according to claim 3, characterized in that Sixth mounting holes matched with the second fastener are formed in the transverse straight leaf spring and the longitudinal comb-shaped leaf spring.

5. The resistance reduction connection structure of the breaker busbar and the contact according to claim 4, characterized in that, Seventh mounting holes matched with the second fastener are formed in the front part of the longitudinal comb-shaped contact plate. Eighth mounting holes corresponding to the position of the second mounting hole are formed in the rear part of the longitudinal comb-shaped contact plate. The second mounting hole, the third mounting hole, and the eighth mounting hole are respectively matched with the first fastener.

6. The resistance reduction connection structure of the breaker busbar and the contact according to claim 5, characterized in that, The part of the longitudinal comb-shaped contact plate where the eighth mounting hole is located is a straight clamping section convenient for clamping it into the contact plate clamping groove.

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