CN214226831U

CN214226831U - DC contactor with auxiliary contact

Info

Publication number: CN214226831U
Application number: CN202022502376.6U
Authority: CN
Inventors: 朱华; 寇逸军; 赵岚
Original assignee: Shanghai Liangxin Electrical Co Ltd
Current assignee: Shanghai Liangxin Electrical Co Ltd
Priority date: 2020-11-02
Filing date: 2020-11-02
Publication date: 2021-09-17
Anticipated expiration: 2030-11-02

Abstract

The utility model provides a take direct current contactor of auxiliary contact, it includes direct current contactor subassembly (1) and auxiliary contact (2), its characterized in that: direct current contactor subassembly (1) utilizes bellows (3) will make its inside confined space (1a) that forms with the clearance passageway seal of external intercommunication, auxiliary contact (2) set up outside confined space (1a), bellows (3) can be followed loose axle (101) in direct current contactor subassembly (1) move together, bellows (3) are followed the in-process of loose axle (101) moving together, loose axle (101) or bellows (3) can link auxiliary contact (2). The utility model discloses set up auxiliary contact outside direct current contactor is sealed cavity, make major loop and auxiliary loop electricity have good isolation performance, the auxiliary contact structure such as available micro-gap switch, reed contact has been applicable to simultaneously, has realized the auxiliary form of multiple structure.

Description

DC contactor with auxiliary contact

Technical Field

The utility model belongs to the technical field of the contactor, specifically say and relate to a take direct current contactor of auxiliary contact.

Background

The contactor belongs to a large-scale and wide-range control electric appliance, is mainly used for frequently switching on or switching off an alternating current main circuit, a direct current main circuit and a large-capacity control circuit, is often matched with an auxiliary contact device for realizing the functions of contactor self-locking, interlocking, contactor state indication and the like, and is widely applied along with energy-saving and efficient direct current equipment such as an electric vehicle, a rapid charging pile, battery switching, high-voltage direct current voltage switch control and the like. However, since the conventional contactor is in a sealed tank state, there is a case where the internal components cannot be grasped, particularly, the state of the contact portion is problematic, and therefore, a structure capable of determining and monitoring the state of the contact portion, that is, an auxiliary contact is required.

Chinese patent ZL201410340161.5 discloses an auxiliary contact for a dc contactor, which comprises an auxiliary contact, wherein the auxiliary contact comprises a reed switch, a permanent magnet, a first pure iron sheet and a second pure iron sheet, the first and second pure iron sheets are symmetrically arranged under a transmission shaft, and a gap is formed between the first and second pure iron sheets; the permanent magnet is fixed on the second pure iron sheet, and the transmission shaft moves downwards to the lowest position and abuts against the permanent magnet even if the moving contact and the static contact are in a disconnected state; the reed switch is arranged on one side of the first and second pure iron sheets; the periphery of the movable iron core is sleeved with a pure iron part, the upper end of the pure iron part extends to the outer side of the movable iron core, and the lower end of the pure iron part extends to the first pure iron sheet and the second pure iron sheet. The auxiliary contact for the direct current contactor utilizes the magnetic field principle, so that a terminal does not need to be led out from the inside of a product, the internal structure and the assembling process of the product are greatly simplified, and the cost is correspondingly reduced. However, in the patent technology, the reed switch is fragile, high in sensitivity and weak in magnetic field interference resistance, and product misoperation is easily caused.

Chinese patent 201610224325.7 discloses a high-pressure sealed dc contactor with auxiliary contacts, which includes a contactor outer casing and a shielding case, wherein a sealed space formed by the contactor outer casing and the shielding case is provided with a main stationary contact, a movable contact piece and a transmission core rod, the movable contact piece is vertically connected to the upper end of the transmission core rod, an auxiliary push rod is arranged on the upper end face of the transmission core rod, the shielding case is provided with a circular hole corresponding to the auxiliary push rod, and the upper end of the auxiliary push rod is inserted into the circular hole; the shielding shell is also provided with an upper auxiliary contact and a lower auxiliary contact respectively, and the auxiliary push rod can drive the lower auxiliary contact to be connected with and disconnected from the upper auxiliary contact when moving up and down along with the transmission core rod. This take high-pressure seal direct current contactor of auxiliary contact because the auxiliary push rod setting is on transmission core bar up end and upper and lower auxiliary contact sets up on the shield shell, so occupation space is very little, need not sacrifice the arc extinguishing magnet steel to the working property of messenger's contactor is more stable. However, the technology of the patent adopts the structure that the auxiliary contact is arranged in the sealed cavity, the electric isolation between the auxiliary contact and the main loop is poor, the ceramic brazing manufacturing process is complex, the product space structure is limited, and the structural form of only one group of auxiliary contacts can be realized.

SUMMERY OF THE UTILITY MODEL

The utility model aims at just to above-mentioned current direct current contactor who takes auxiliary contact, the interference killing feature leads to product malfunction or electrical isolation relatively poor easily, the defect that structure technology is complicated provides a take direct current contactor of auxiliary contact, set up auxiliary contact outside direct current contactor is sealed cavity, make main loop and auxiliary loop electricity have good isolation performance, simultaneously applicable auxiliary contact structures such as available micro-gap switch, reed contact, the auxiliary form of multiple structure has been realized.

Technical scheme

In order to realize the technical purpose, the utility model provides a pair of take direct current contactor of auxiliary contact, it includes direct current contactor subassembly and auxiliary contact, its characterized in that: the direct current contactor component utilizes a corrugated pipe to seal a gap channel communicated with the outside to enable the inside to form a sealed space, the auxiliary contact is arranged outside the sealed space, the corrugated pipe can move along with a movable shaft in the direct current contactor component, the corrugated pipe moves along with the movable shaft, and the movable shaft or the corrugated pipe can be linked with the auxiliary contact.

Further, the one end of bellows with iron core sleeve bottom surface fixed connection in the direct current contactor subassembly, the bellows other end with loose axle fixed connection, the loose axle stretches out the telescopic one end of iron core links with auxiliary contact, makes when direct current contactor breaks off, auxiliary contact is in initial condition, when direct current contactor inhales, auxiliary contact is in the switching commentaries on classics state.

Further, one end of the corrugated pipe is fixedly connected with the bottom surface of an iron core sleeve in the direct current contactor assembly, one end of the movable shaft, extending out of the iron core sleeve, is in contact with or fixedly connected with the corrugated pipe, the movable shaft can drive the corrugated pipe to perform telescopic motion when moving up and down, and in the telescopic motion process of the corrugated pipe, the lower end part of the corrugated pipe is linked with the auxiliary contact, so that the auxiliary contact is in an initial state when the direct current contactor is disconnected, and when the direct current contactor is attracted, the auxiliary contact is in a switching and rotating state.

Further, the auxiliary contact is a micro switch or a reed contact.

Advantageous effects

The utility model provides a pair of take direct current contactor of auxiliary contact sets up auxiliary contact outside direct current contactor is sealed cavity, makes main loop and auxiliary loop electricity have good isolation performance, and the auxiliary contact structure such as applicable micro-gap switch, reed contact has realized the auxiliary form of multiple structure simultaneously.

Drawings

Fig. 1 is a schematic perspective view of a structure in a release state according to embodiment 1 of the present invention;

FIG. 2 is a schematic view of a bellows in embodiment 1 of the present invention;

FIG. 3 is a schematic view of an installation structure of a movable shaft and a corrugated pipe in embodiment 1 of the present invention;

fig. 4 is a schematic view of embodiment 1 of the present invention in an actuation state;

fig. 5 is a schematic view of an installation structure of a movable shaft and a corrugated pipe in embodiment 2 of the present invention;

fig. 6 is a schematic view of embodiment 2 of the present invention in a released state;

fig. 7 is a schematic view of embodiment 2 of the present invention in an actuation state;

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 and 2, the dc contactor with the auxiliary contact comprises a dc contactor assembly 1 and an auxiliary contact 2, wherein the contactor assembly 1 comprises a binding post, an insulating cover, a magnetic yoke, an iron core sleeve 102 and a vent pipe. The direct current contactor assembly 1 utilizes a corrugated pipe 3 to seal a gap channel communicated with the outside so as to form a sealed space 1a inside, and an auxiliary contact 2 is arranged outside the sealed space 1a, wherein the auxiliary contact 2 is preferably a micro switch or a reed contact in the embodiment. The corrugated pipe 3 can move along with the movable shaft 101 in the direct current contactor assembly 1, and in the process that the corrugated pipe 3 moves along with the movable shaft 101, the movable shaft 101 can be linked with the auxiliary contact 2.

Specifically, as shown in fig. 3, one end 301 of the corrugated tube 3 is fixedly mounted or welded to the bottom surface of the core sleeve 102 in the dc contactor assembly 1, the other end 302 of the corrugated tube 3 is fixedly mounted or welded to the movable shaft 101, and one end of the movable shaft 101 extending out of the core sleeve 102 is linked to the auxiliary contact 2.

As shown in fig. 1, when the dc contactor is turned off, the movable shaft 101 moves downward to drive the auxiliary contact 2, and the auxiliary contact 2 is in an initial state, as shown in fig. 4, when the dc contactor is engaged, the movable shaft 101 moves upward away from the auxiliary contact 2 in a switching state.

Example 2

In an embodiment provided by the present invention, as shown in fig. 5, one end of the bellows 3 is fixedly mounted or welded to the bottom surface of the core sleeve 102 in the dc contactor assembly 1, one end of the movable shaft 101 extending out of the core sleeve 102 is in contact with or fixedly connected to the bellows 3, when the movable shaft 101 moves up and down, the bellows 3 can be driven to move telescopically, and during the telescopic movement of the bellows 3, the lower end of the bellows 3 is linked to the auxiliary contact 2;

as shown in fig. 6, when the dc contactor is turned off, the bellows 3 extends downward to drive the auxiliary contact 2, and the auxiliary contact 2 is in an initial state, as shown in fig. 7, when the dc contactor is engaged, the bellows 3 retracts upward away from the auxiliary contact 2, and the auxiliary contact 2 is in a switching state.

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. The utility model provides a take direct current contactor of auxiliary contact, it includes direct current contactor subassembly (1) and auxiliary contact (2), its characterized in that: direct current contactor subassembly (1) utilizes bellows (3) will make its inside confined space (1a) that forms with the clearance passageway seal of external intercommunication, auxiliary contact (2) set up outside confined space (1a), bellows (3) can be followed loose axle (101) in direct current contactor subassembly (1) move together, bellows (3) are followed the in-process of loose axle (101) moving together, loose axle (101) or bellows (3) can link auxiliary contact (2).

2. A dc contactor with auxiliary contacts as claimed in claim 1, wherein: the one end of bellows (3) with iron core sleeve (102) bottom surface fixed connection in direct current contactor subassembly (1), the bellows (3) other end with loose axle (101) fixed connection, loose axle (101) stretch out the one end and the auxiliary contact (2) linkage of iron core sleeve (102) make during direct current contactor disconnection, auxiliary contact (2) are in initial condition, when direct current contactor inhales, auxiliary contact (2) are in the switching commentaries on classics state.

3. A dc contactor with auxiliary contacts as claimed in claim 1, wherein: the one end of bellows (3) with iron core sleeve (102) bottom surface fixed connection in direct current contactor subassembly (1), the one end that iron core sleeve (102) was stretched out in loose axle (101) with bellows (3) contact or fixed connection, during loose axle (101) up-and-down motion, can drive bellows (3) concertina movement, bellows (3) concertina movement in-process, tip and auxiliary contact (2) linkage under bellows (3) make during the direct current contactor disconnection, auxiliary contact (2) are in initial condition, when direct current contactor inhales, auxiliary contact (2) are in the switching commentaries on classics attitude.

4. A dc contactor with auxiliary contacts as claimed in claim 1, wherein: the auxiliary contact (2) is a microswitch or a reed contact.