CN212750735U

CN212750735U - Contact structure of bipolar direct current contactor

Info

Publication number: CN212750735U
Application number: CN202020950730.9U
Authority: CN
Inventors: 朱华; 寇逸军; 赵岚
Original assignee: Liangxin Electrical Appliances Haiyan Co ltd; Shanghai Liangxin Electrical Co Ltd
Current assignee: Liangxin Electrical Appliances Haiyan Co ltd; Shanghai Liangxin Electrical Co Ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2021-03-19
Anticipated expiration: 2030-05-29

Abstract

A contact structure of a bipolar direct current contactor comprises a bracket (1), a movable contact bridge group (2) is installed on the bracket (1), and the bipolar direct current contactor is characterized in that: the movable contact bridge group (2) is provided with at least two groups of movable contacts, the support (1) is installed on the push rod (4) and can move back and forth on the push rod (4) along the axial direction of the push rod (4), the support (1) drives the movable contact bridge group (2) to be jointed with or separated from the binding post (5) in the back and forth movement process on the push rod (4), so that the bipolar direct current contactor is connected or disconnected, the spring (3) is sleeved at one end of the push rod (4) to abut against the support (1), and the other end of the spring abuts against the boss (401) on the push rod (4). The contact structure can realize a bipolar function, reduces the number of parts, improves the assembly efficiency and meets the requirement of high-precision assembly.

Description

Contact structure of bipolar direct current contactor

Technical Field

The utility model belongs to the technical field of direct current contactor, specifically say so and relate to a bipolar direct current contactor's contact structure.

Background

The direct current contactor generally comprises a coil, an external magnetic circuit, an arc extinguish chamber, a fixed contact, a movable shaft assembly, a permanent magnet, a plastic shell and the like, along with the wide use of energy-saving and efficient direct current equipment such as an electric automobile, a rapid charging pile, battery switching, high-voltage direct current voltage switch control and the like, particularly the extensive development and use of the electric automobile, the product performance requirement of the direct current contactor with multiple contact groups is improved, but the existing bipolar direct current contactor is realized by 2 single-pole direct current contactors, and due to the deviation of a mechanical structure, the synchronism of closing of multiple contact groups is poor, the volume is large, the cost is high, and the installation is; on the other hand, the tracking push rod, the reset push rod and the movable contact support are integrally molded in an injection mode, the movable contact components are symmetrically arranged on two sides of the push rod along the radial direction, and due to the fact that the injection molding process is complex and many injection molding parts are involved, manufacturing is difficult, the number of assembling parts is large, and assembling efficiency is low. There are bipolar dc contactors on the market, which are similar to ac contactor support structure, and the high precision requirement is difficult to reach the standard.

Chinese patent CN105551894B discloses a moving contact structure for a high power dc contactor, which includes two moving contact assemblies, a moving contact support and a reset push rod, wherein the two moving contact assemblies are symmetrically arranged at two sides of the reset push rod along a radial direction, and the moving contact assemblies, the reset push rod and the moving contact support are integrally molded by injection. The movable contact structure for the high-power direct-current contactor is characterized in that a movable contact support is made of high-strength plastic materials, and a movable contact component, a reset push rod and the movable contact support are integrally injection-molded, so that a centering effect is achieved, the action consistency of the movable contact component is improved, and the reliability of the direct-current contactor is improved; in addition, two groups of movable contact assemblies are arranged on one push rod, so that used parts are reduced, the space is saved, and the volume of the direct current contactor is reduced. However, the movable contact components of the movable contact structure for the contactor are symmetrically arranged on two sides of the push rod along the radial direction, and the tracking push rod, the reset push rod and the movable contact support are integrally molded.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an aim at be exactly to current bipolar direct current contactor part many, bulky, assembly efficiency is low, the technology is complicated, is difficult to satisfy the technical defect who assembles the high accuracy requirement, provides a bipolar direct current contactor's contact structure, can not only realize bipolar function, has reduced spare part quantity simultaneously, promotes assembly efficiency, satisfies the requirement of high accuracy assembly.

Technical scheme

In order to achieve the technical purpose, the utility model provides a pair of bipolar direct current contactor's contact structure, including the support, the movable contact bridge group is installed on the support, its characterized in that: the movable contact bridge group is provided with at least two groups of movable contacts, the bracket is arranged on the push rod and can move back and forth on the push rod along the axial direction of the push rod, and the movable contact bridge group is driven to be jointed with or separated from the binding post by the bracket in the back and forth movement process on the push rod, so that the connection or disconnection of the bipolar direct current contactor is realized;

the spring is sleeved at one end of the push rod and props against the bracket, and the other end of the spring props against the boss on the push rod.

Further, the movable contact bridge group and the support are concentrically arranged together in a penetrating mode.

Furthermore, the movable contact bridge group comprises a first movable contact bridge and a second movable contact bridge, and the first movable contact bridge and the second movable contact bridge are fixedly installed in corresponding installation grooves on the support or are in an integrated structure with the support.

Furthermore, the contact part of the binding post corresponding to the movable contact bridge group is set to be a curved surface. The structure further enhances the contact reliability of the binding post and the corresponding contact part of the movable contact bridge group.

Furthermore, the movable contact bridge group comprises a movable contact bridge III and a movable contact bridge IV, movable contacts of the movable contact bridge III and the movable contact bridge IV are located in the radial direction of the push rod, and the movable contact bridge III and the movable contact bridge IV are arranged on two sides of the diameter of the push rod.

Advantageous effects

The utility model provides a pair of bipolar direct current contactor's contact structure can not only realize bipolar function, has reduced the degree of difficulty of manufacturing process moreover, has reduced spare part quantity, and reduce cost makes assembly process simpler, promotes assembly efficiency, satisfies the high accuracy assembly requirement.

Drawings

Fig. 1 is a schematic perspective view of embodiment 1 of the present invention;

FIG. 2 is a fixing mode of a movable contact bridge group and a bracket in embodiment 1 of the present invention;

fig. 3 is a schematic view of the release position of embodiment 1 of the present invention;

FIG. 4 is a schematic view of the suction position of embodiment 1 of the present invention;

FIG. 5 is a schematic view of a terminal structure in embodiment 1 of the present invention;

fig. 6 shows a fixing mode of the movable contact bridge group and the bracket in embodiment 2 of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Example 1

As shown in fig. 1, a contact structure of a bipolar dc contactor includes a bracket 1, a movable contact bridge group 2 is mounted on the bracket 1, the movable contact bridge group 2 is provided with at least two groups of movable contacts, the bracket 1 is mounted on a push rod 4 and can move back and forth on the push rod 4 along an axial direction of the push rod 4, the bracket 1 drives the movable contact bridge group 2 to be engaged with or disengaged from a binding post 5 during the back and forth movement on the push rod 4, so as to realize the connection or disconnection of the bipolar dc contactor, a spring 3 is sleeved on one end of the push rod 4 to abut against the bracket 1, and the other end abuts against a boss 401 on the push rod 4. As shown in fig. 5, a contact portion 501 of the terminal 5 corresponding to the moving contact bridge group 2 is configured as a curved surface.

In this embodiment, as shown in fig. 2, the moving contact bridge group 2 is concentrically installed with the support 1. As shown in fig. 1, the moving contact bridge group 2 includes a first moving contact bridge 201 and a second moving contact bridge 202, and the first moving contact bridge 201 and the second moving contact bridge 202 are fixedly installed in corresponding installation grooves 1a on the support 1 or are formed by injection molding and integral molding with the support 1.

As shown in figure 3, the moving contact bridge group 2 is separated from the binding post 5, and the bipolar direct current contactor is in an off state, as shown in figure 4, when the moving contact bridge group 2 moves upwards to be jointed with the binding post 5, the bipolar direct current contactor is in an on state, and at the moment, the spring 3 is further compressed to generate certain contact pressure, so that the attraction is more reliable. Meanwhile, the contact part 501 of the binding post 5 corresponding to the movable contact bridge group 2 is set as a curved surface, so that the action synchronism and the contact reliability of the bipolar multi-contact are further improved.

Example 2

As shown in fig. 6, the present invention further provides an embodiment in which the movable contact bridge group 2 includes a third movable contact bridge 203 and a fourth movable contact bridge 204, the movable contacts of the third movable contact bridge 203 and the fourth movable contact bridge 204 are located in the radial direction of the push rod 4, and the third movable contact bridge 203 and the fourth movable contact bridge 204 are disposed on two sides of the diameter of the push rod 4. The engaging and breaking process of the moving contact bridge group 2 and the terminal 5 of this embodiment is the same as that of embodiment 1, and will not be further elaborated here.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A contact structure of a bipolar direct current contactor comprises a bracket (1), a movable contact bridge group (2) is installed on the bracket (1), and the bipolar direct current contactor is characterized in that: the movable contact bridge group (2) is provided with at least two groups of movable contacts, the bracket (1) is arranged on the push rod (4) and can move back and forth on the push rod (4) along the axial direction of the push rod (4), and the movable contact bridge group (2) is driven to be jointed with or separated from the binding post (5) by the bracket (1) in the back and forth movement process on the push rod (4), so that the connection or disconnection of the bipolar direct current contactor is realized;

the spring (3) is sleeved at one end of the push rod (4) to abut against the support (1), and the other end of the spring abuts against the boss (401) on the push rod (4).

2. A contact structure of a bipolar direct current contactor as claimed in claim 1, wherein: the movable contact bridge group (2) and the bracket (1) are concentrically arranged together in a penetrating way.

3. A contact structure of a bipolar direct current contactor as claimed in claim 2, wherein: the movable contact bridge group (2) comprises a first movable contact bridge (201) and a second movable contact bridge (202), and the first movable contact bridge (201) and the second movable contact bridge (202) are fixedly installed in corresponding installation grooves (1a) on the support (1) or are of an integrated structure with the support (1).

4. A contact structure of a bipolar direct current contactor as claimed in claim 1, wherein: and a contact part (501) of the binding post (5) corresponding to the movable contact bridge group (2) is set to be a curved surface.

5. A contact structure of a bipolar direct current contactor as claimed in claim 1, wherein: the movable contact bridge group (2) comprises a third movable contact bridge (203) and a fourth movable contact bridge (204), movable contacts of the third movable contact bridge (203) and the fourth movable contact bridge (204) are located in the radial direction of the push rod (4), and the third movable contact bridge (203) and the fourth movable contact bridge (204) are arranged on two sides of the diameter of the push rod (4).