CN112713014A

CN112713014A - Rotary roller contact structure

Info

Publication number: CN112713014A
Application number: CN202011489122.3A
Authority: CN
Inventors: 孔凡良; 沈文; 赵成宏; 祝聪; 汪浩
Original assignee: WUHAN CHANGHAI ELECTRICAL TECHNOLOGY DEVELOPMENT CO LTD; Wuhan Institute of Marine Electric Propulsion China Shipbuilding Industry Corp No 712 Institute CSIC
Current assignee: WUHAN CHANGHAI ELECTRICAL TECHNOLOGY DEVELOPMENT CO LTD; Wuhan Institute of Marine Electric Propulsion China Shipbuilding Industry Corp No 712 Institute CSIC
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2021-04-27
Anticipated expiration: 2040-12-16
Also published as: CN112713014B

Abstract

The invention discloses a rotary roller contact structure which can realize the bridging function between contacts of a circuit breaker and comprises a cam mechanism, a movable contact structure and a contact support structure, wherein the cam mechanism consists of a cam and a roller which is riveted and fixed on the cam through a short rivet, the movable contact structure consists of a connecting rod and a silver roller which is fixed on the connecting rod through a rotating shaft, and the contact support structure consists of a plurality of clamping plates, a connecting shaft, a limiting shaft and a pin shaft. Each part of the invention adopts layered design and modular design, and has the advantages of distinct layers and simple and compact structure; the silver roller swing design in the contact guarantees that the silver roller and the static contact are reliably contacted, and simultaneously, the silver roller can also freely rotate and is in rolling contact with the static end contact, so that the self-cleaning function is realized, the service life of the switch is favorably prolonged, and the reliability is high.

Description

Rotary roller contact structure

Technical Field

The invention belongs to the technical field of power equipment, and particularly relates to a rotary roller contact structure.

Background

At present, a large number of switching devices such as various disconnecting switches, contactors, and circuit breakers are used in power systems. The contact structure of the switch device generally comprises a moving contact and a fixed contact, the contact of some switch devices is a direct-acting structure, and the contact of some switch devices is a clapper structure.

The following problems can occur in the contact during long-term use: when the switch is disconnected in an on-load or overload state, metal particle protrusions or foreign matters are generated on the surface of the contact under the action of electric arcs, and meanwhile, due to the fact that the surface of the contact is exposed in the air and is easy to be subjected to wire surface oxidation, contact failure or contact resistance increase can be caused, the contact is overheated, and if the contact is not cleaned in time, normal operation of the switch device is seriously affected.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a rotary roller contact structure which adopts a layered design and a modular design and has the advantages of clear layers and simple and compact structure.

The technical scheme adopted by the invention for solving the technical problems is as follows: a rotary roller contact structure comprises a cam mechanism, a moving contact structure and a contact support structure, wherein the cam mechanism drives the moving contact structure to rotate by driving the contact support structure, so that the cam mechanism is contacted with a fixed contact; the cam mechanism consists of a cam and a roller fixed on the cam through a short rivet in a riveting manner, and the roller can rotate freely to reduce the friction resistance of the contact structure in the contact system; the movable contact structure consists of a connecting rod and a silver roller which is fixed on the connecting rod through a rotating shaft and can freely rotate, the silver roller is used for rolling contact with the static contact and has a self-cleaning function, the rotating shaft is used for driving the contact to slightly swing left and right and is connected with the connecting rod through the arc-shaped middle part, and the reliable contact between the silver roller and the static contact is ensured; the contact supporting structure is composed of a plurality of clamping plates which are arranged in parallel, and a connecting shaft, a limiting shaft and a pin shaft which are transversely arranged on the upper portion, the middle portion and the bottom end portion of each clamping plate in a penetrating mode respectively, the connecting shafts are connected and installed in the cam mechanism, one end of each connecting shaft is supported by a spring on each clamping plate, the other end of each connecting shaft is fixed on the cam through long rivets, the springs provide contact pressure for the moving contacts, good contact among the contacts is guaranteed, the limiting shaft penetrates through the contact supporting structure and a supporting piece to be fixed in the middle portion of the cam in a riveting mode, a limiting protection effect is achieved for contact travel, and the limiting shaft and.

The rotary roller contact structure is provided with a plurality of contact supporting structures.

The pin shaft of the rotary roller contact structure is fixedly connected with the clamping plate through a long rivet.

The spring of the rotary roller contact structure is horizontally fixed at the top end part of the clamping plate.

The invention has the beneficial effects that:

the invention adopts the layered design and the modular design, and has the advantages of distinct layers and simple and compact structure; meanwhile, the silver roller in the contact is in rolling contact, so that the self-cleaning of the contact can be realized, the service life of the switch can be prolonged, and the reliability is high.

2, the contact structure provided by the invention can rotate rapidly in the contact system; the silver roller is fixed on the connecting rod through the rotating shaft, wherein the middle part of the rotating shaft is designed in an arc shape, so that the contact can be driven to slightly swing left and right, and the reliable contact between the silver roller and the static contact is ensured; meanwhile, the silver roller can rotate freely and is in rolling contact with the static end contact, the self-cleaning function is achieved, the service life of the switch is prolonged, and the reliability is high.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural view of the moving contact structure and contact support structure of the present invention;

fig. 3 is a schematic structural diagram of the moving contact structure of the invention.

The figures are numbered: the device comprises a cam mechanism 1, a movable contact structure 2, a contact support structure 3, a pin shaft 4, a limiting shaft 5, a spring 6, a connecting shaft 7, a cam 11, a roller 12, a short rivet 13, a silver roller 21, a rotating shaft 22, a connecting rod 23, a clamping plate 31, a long rivet 32 and a support shaft 33.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

As shown in fig. 1, the rotary roller contact structure provided in the embodiment of the present invention includes a cam mechanism 1, a moving contact structure 2, a contact support structure 3, a long rivet 32, a limiting shaft 5, a spring 6, and a connecting shaft 7, where the cam mechanism 1 drives the moving contact structure 2 to rotate by driving the contact support structure 3, so as to implement contact with a fixed contact.

The cam mechanism 1 consists of a cam 11, a roller 12 and a short rivet 13, the roller 12 is riveted and fixed on the cam 11 through the short rivet 13, the roller 12 can rotate freely, and the friction resistance of the contact structure in a contact system is reduced. The movable contact structure 2 consists of a silver roller 21, a rotating shaft 22 and a connecting rod 23, wherein the silver roller 21 is fixed on the connecting rod 23 through the rotating shaft 22, the silver roller 21 can freely rotate, and the contact position of the rotating shaft 22 and the connecting rod 23 is designed to be circular arc; the contact support structure 3 is composed of a clamping plate 31, a long rivet 32 and a support shaft 33.

As a specific embodiment, as shown in fig. 2 and fig. 3, the moving contact structure 2 is connected through a shaft pin 4 on a contact support 3, and the cam mechanism 1 drives the contact support structure 3 to drive the moving contact structure 2 to rotate, so as to realize contact with a fixed contact; the silver roller 21 is fixed on the connecting rod 23 through the rotating shaft 22 in the circular arc design, and the roller contact can slightly swing left and right, so that the silver roller 21 is ensured to be reliably contacted with the static contact; meanwhile, the silver roller 21 can rotate freely and is in rolling contact with the static contact, and the silver roller has a self-cleaning function.

The contact supporting structure 3 is connected by a connecting shaft 7 and is arranged in the cam mechanism 1, one end of the contact supporting structure is supported by a spring 6, the other end of the contact supporting structure is fixed on the cam 11 through a long rivet 32, and the spring 6 can provide contact pressure for the moving contact structure 2 to ensure good contact between contacts; the limiting shaft 5 penetrates through the contact support 3 and is fixed on the cam 11, and plays a role in limiting and protecting the contact stroke; the contact supporting structure 3 can expand the number of the moving contact structures 2 according to the current of the switch loop.

The limiting shaft 5 penetrates through the contact support structure 3 and the supporting piece and is fixed in the middle of the cam 11 in a riveting mode, and the limiting shaft plays a limiting protection role for the contact stroke. The contact supporting structure 3 can expand the number of the moving contact structures 2 according to the current of the switch loop.

In conclusion, the invention adopts the layered design and the modular design, and has the advantages of clear layers and simple and compact structure; the swing design of the silver roller 21 in the contact ensures that the silver roller 21 is reliably contacted with the fixed contact, and meanwhile, the silver roller 21 can also rotate freely and is in rolling contact with the fixed end contact, so that the contact has a self-cleaning function, the service life of the switch is prolonged, and the reliability is high. The silver roller 21 in the contact is in rolling contact, and self-cleaning of the contact can be realized.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A rotary roller contact structure is characterized in that: the device comprises a cam mechanism (1), a moving contact structure (2) and a contact support structure (3), wherein the cam mechanism (1) drives the moving contact structure (2) to rotate by driving the contact support structure (3) to realize contact with a fixed contact;

the cam mechanism (1) consists of a cam (11) and a roller (12) which is fixed on the cam (11) through a short rivet (13) and can rotate freely;

the moving contact structure (2) is composed of a connecting rod (23) and a silver roller (21) which is fixed on the connecting rod (23) through a rotating shaft (22) and can rotate freely, the silver roller (21) is used for rolling contact with a fixed contact, the rotating shaft (22) is used for driving the contact to swing, and the rotating shaft is connected with the connecting rod (23) through an arc-shaped middle part;

contact bearing structure (3) by a plurality of splint (31) of parallel arrangement and transversely wear to locate connecting axle (7), spacing axle (5) and round pin axle (4) of splint (31) upper portion, middle part and bottom portion respectively and constitute, connecting axle (7) install in cam mechanism (1), one end is supported by spring (6) on splint (31), the other end passes through long rivet (32) to be fixed on cam (11), spacing axle (5) and round pin axle (4) between through parallel back shaft (33) and connecting rod (23) swing joint.

2. A rotary roller contact arrangement according to claim 1, wherein there are a plurality of contact support structures (3).

3. A rotary roller contact arrangement according to claim 1, characterised in that the pin (4) is fastened to the clamping plate (31) by means of a long rivet (32).

4. A rotary roller contact arrangement according to claim 1, characterised in that the spring (6) is fixed horizontally to the top end of the clamping plate (31).