CN212182236U

CN212182236U - Novel contact

Info

Publication number: CN212182236U
Application number: CN202021231092.1U
Authority: CN
Inventors: 王太平
Original assignee: Beijing Sanlaite Electromechanical Equipment Co Ltd
Current assignee: Beijing Sanlaite Electromechanical Equipment Co Ltd
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2020-12-18
Anticipated expiration: 2030-06-29

Abstract

The utility model relates to a novel contact relates to electrical service equipment field, and it includes movable contact and stationary contact, the stationary contact is provided with a plurality of, and the length that a plurality of stationary contacts formed is the same with the length of movable contact, the movable contact includes the moving contact and is used for the dead lever of fixed moving contact, the stationary contact includes the static contact and is used for the support portion of fixed static contact, the tip of moving contact and static contact sets up in opposite directions, and moving contact or static contact include electrically conductive anti-melting layer, and two electrically conductive anti-melting layers set up in opposite directions. The application has the effect of reducing the possibility of bonding between the movable contact and the static contact.

Description

Novel contact

Technical Field

The application relates to the field of electrical equipment, in particular to a novel contact.

Background

The relay is widely applied to various industries as a basic element, and the requirement on the relay is higher and higher along with the continuous updating of equipment in various industries. Especially, the service life and overload of the relay affect the usability and reliability of the whole relay. When the relay is switched on a rated load in a closed state, the movable contact and the fixed contact can generate heat continuously, silver layers on the surfaces of the contacts can be fused and bonded, and the relay can be disconnected under a rated control voltage or the electric service life can not meet the requirement under the rated load. In addition, short-circuit failure or surge current may occur in the circuit, and the silver layer may be adhered to the surface of the relay contact even when the large current flows, which may cause the occurrence of phenomena such as relay explosion. Therefore, the movable and static contacts are important for the reliable work of the relay and are the most important components of the relay.

The electrical service life of the relay requires that the contact system is switched on and off with a rated load for a certain number of times, and the problems frequently encountered by the current relay are as follows: after working for a period of time, the movable and static contacts are bonded and are not easy to be disconnected, because the contact surfaces of the movable and static contacts are caused by the melting of the silver layer due to high temperature. Therefore, a new contact set is needed.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that the movable and static contacts are not easy to break after working for a period of time, the application provides a novel contact.

The application provides a novel contact adopts following technical scheme:

the utility model provides a novel contact, includes movable contact and stationary contact, the stationary contact is provided with a plurality of, and the length that a plurality of stationary contacts formed is the same with the length of movable contact, the movable contact includes the moving contact and is used for the dead lever of fixed moving contact, the stationary contact includes the static contact and is used for the support portion of fixed static contact, the tip of moving contact and static contact sets up in opposite directions, and moving contact or static contact include electrically conductive anti-melting layer, and two electrically conductive anti-melting layers set up in opposite directions.

Through adopting above-mentioned technical scheme, this novel contact can fix the stationary contact installation in the casing of relay when using to install the movable contact at the upside of stationary contact, drive the movable contact through other structures afterwards and remove towards the stationary contact and make movable contact and static contact each other or break off, make the contact can normally work. Because the static contact is always in a standby state and the electric arcs are mostly located at the static contact, the arrangement of the plurality of static contacts can reduce the load of a single static contact, simultaneously can enhance the contact area between the moving contact and the static contact, reduce the generation of larger resistance between the moving contact and the static contact when in contact, and further reduce the possibility that more heat generated between the moving contact and the static contact is melted and bonded; meanwhile, the conductive anti-melting layer is arranged on the moving contact or the static contact, so that the contact surface of the moving contact or the static contact is not easy to bond and break, and the service life of the contact is prolonged.

Preferably, the side walls of the two conductive anti-melting layers, which are in contact with each other, are arranged in an arc shape, and the arc-shaped protrusions of the two conductive anti-melting layers are arranged oppositely.

Through adopting above-mentioned technical scheme, have great space between the electrically conductive anti-melting layer of two arc settings to be convenient for move, the heat dissipation of stationary contact surface.

Preferably, the conductive anti-melting layer is a silver tin oxide layer.

By adopting the technical scheme, the silver tin oxide has higher melting point and boiling point and higher hardness, is favorable for improving the anti-sticking property and can save the using amount of silver.

Preferably, the moving contact or the static contact further comprises a conductive layer arranged on one side of the conductive anti-melting layer, and the conductive layer is made of silver-copper alloy.

By adopting the technical scheme, the conductive layer made of the silver-copper alloy not only has excellent conductive performance, but also has good arc erosion resistance and fusion welding resistance, good voltage resistance and strong breaking capacity, so that the contact has excellent use performance.

Preferably, an arc extinguishing plate is fixedly connected to the side wall of one side of the fixed rod, the arc extinguishing plate is arranged in an arc shape, the arc-shaped protrusion of the arc extinguishing plate is far away from the fixed rod, and the connecting point of the arc extinguishing plate and the fixed rod is arranged on one side of the movable contact.

Through adopting above-mentioned technical scheme, the arc-extinguishing plate that the arc set up can lead and eliminate the electric arc that produces when moving, stationary contact is kept away from to reduce the influence of electric arc to the contact use, the practicality is stronger.

Preferably, the arc plates have a cross-section gradually decreasing from an end thereof, which is in contact with the fixing bar, to the other end thereof.

By adopting the technical scheme, the occupied volume of the arc-extinguishing plate can be reduced, and the arc-extinguishing performance of the arc-extinguishing plate is ensured.

Preferably, the upper end rigid coupling of dead lever has the installation component, and the installation component is including setting up the head rod on the dead lever, and the tip rigid coupling that the head rod deviates from the dead lever has the second connecting rod, and the head rod sets up with the dead lever slope, second connecting rod and dead lever parallel arrangement.

By adopting the technical scheme, the installation component is arranged, so that the working position and the installation position of the movable contact can be far away from each other, the influence of other electric elements in the relay on the movable contact is reduced, and meanwhile, the movable contact is convenient to install.

Preferably, the side wall of the second connecting rod is provided with a plurality of mounting holes.

Through adopting above-mentioned technical scheme, the staff of being convenient for carries out installation work to the head rod in the setting of mounting hole.

To sum up, the application comprises the following beneficial technical effects:

1. the arrangement of the plurality of static contacts can reduce the load of a single static contact, simultaneously can enhance the contact area between the movable contact and the static contact, reduce the generation of larger resistance between the movable contact and the static contact when in contact, and further reduce the possibility that more heat generated between the movable contact and the static contact is melted and bonded; meanwhile, the conductive anti-melting layer is arranged on the moving contact or the static contact, so that the contact surface of the moving contact or the static contact is not easy to bond and break, and the service life of the contact is prolonged;

2. the silver tin oxide has higher melting point and boiling point and higher hardness, is beneficial to improving the anti-sticking property and can save the using amount of silver;

3. the arc-extinguishing plate that the arc set up can lead and eliminate the electric arc that produces when moving, stationary contact is kept away from to reduce the influence of electric arc to the contact use, the practicality is stronger.

Drawings

Fig. 1 is a schematic view of the overall structure of the present application.

Fig. 2 is a side view of the present application.

Fig. 3 is a partially enlarged schematic view of a portion a in fig. 2.

In the figure, 1, a movable contact; 11. a moving contact; 12. fixing the rod; 121. an arc extinguishing plate; 122. a first connecting rod; 123. a second connecting rod; 1231. mounting holes; 2. a stationary contact; 21. static contact; 22. a bearing part; 221. a first support rod; 222. a second support rod; 3. a conductive layer; 4. a conductive anti-melt layer; 5. a connecting assembly; 51. a clamping and connecting rod; 52. a clamping cavity; 53. a protrusion; 54. connecting the magnetic strips; 55. a first clamping groove; 56. a second clamping groove.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses a novel contact. Referring to fig. 1 and 2, a novel contact includes a moving contact 1 and three stationary contacts 2 disposed at a lower side of the moving contact 1, in the embodiment of the present disclosure, three stationary contacts 2 are disposed, three stationary contacts 2 are stacked one on another, a length formed by the three stationary contacts 2 is the same as a length of the moving contact 1, the three stationary contacts 2 reduce a load of a single stationary contact 21, and simultaneously, a contact area between the moving contact 11 and the stationary contact 21 can be increased, a larger resistance generated between the moving contact 11 and the stationary contact 21 when contacting is reduced, and then, a possibility that more heat generated between the moving contact 11 and the stationary contact 21 is melted and bonded is reduced; the movable contact 1 comprises a movable contact 11 and a fixed rod 12 fixedly connected to the upper side of the movable contact 11; the stationary contact 2 includes a stationary contact 21 and a supporting portion 22 for fixing the stationary contact 21.

Referring to fig. 2 and 3, the ends of the moving contact 11 and the static contact 21 are disposed opposite to each other, and the moving contact 11 or the static contact 21 includes a conductive layer 3 and a conductive anti-melting layer 4 disposed outside the conductive layer 3; the conductive layer 3 is made of silver-copper alloy, and the conductive layer 3 made of the silver-copper alloy not only has excellent conductive performance, but also has good arc erosion resistance and fusion welding resistance, good voltage resistance and strong breaking capacity, so that the contact has excellent use performance; the edge of the end part of the conductive anti-melting layer 4 is provided with a fillet, so that the edge of the movable contact and the fixed contact 2 is not easy to generate an edge discharge phenomenon, and the contacts are safer to use; the conductive anti-melting layer 4 is a silver tin oxide layer, and the silver tin oxide has higher melting point and boiling point and higher hardness, so that the anti-sticking property is improved, and the using amount of silver can be saved; the lateral wall that two electrically conductive anti-melting layers 4 contacted each other sets up for the arc, and two electrically conductive anti-melting layers 4's arc is protruding 53 sets up in opposite directions, has great space between the electrically conductive anti-melting layer 4 that the arc set up to be convenient for move, the heat dissipation of 2 contact surfaces of stationary contact.

Referring to fig. 1 and 2, an arc-extinguishing plate 121 is fixedly connected to a side wall of one side of the fixed rod 12, the cross section of the arc-extinguishing plate 121 is arc-shaped, an arc-shaped protrusion 53 of the arc-extinguishing plate 121 is arranged away from the fixed rod 12, the fixed connection point of the arc-extinguishing plate 121 and the fixed rod 12 is arranged at one side of the movable contact 1, and the arc-extinguishing plate 121 can guide and eliminate an arc generated when the movable contact 2 and the fixed contact 2 are far away from each other, so that the influence of the arc on the use of the contacts is reduced; the cross-section of the arc plates 121 decreases gradually from the end thereof contacting the fixing bar 12 to the other end of the arc plates 121, so that the occupied volume of the arc plates 121 can be reduced while ensuring arc extinguishing performance of the arc plates 121.

Referring to fig. 1 and 2, the upper end of the fixing rod 12 is fixedly connected with a mounting assembly, the mounting assembly includes a first connecting rod 122 disposed on the fixing rod 12, and the end of the first connecting rod 122 away from the fixing rod 12 is fixedly connected with a second connecting rod 123; the first connecting rod 122 and the fixed rod 12 are obliquely arranged, the second connecting rod 123 is parallel to the fixed rod 12, and the first connecting rod 122 and the second connecting rod 123 are matched with each other, so that the working position and the mounting position of the movable contact 1 can be far away from each other, the influence of other electric elements in the relay on the movable contact 1 is reduced, meanwhile, the movable contact 2 and the fixed contact 2 have small distances, and the contact effect between the movable contact 2 and the fixed contact 2 is better; two mounting holes 1231 located on the same horizontal plane are formed in the side wall of the second connecting rod 123, so that the worker can conveniently mount the first connecting rod 122.

Referring to fig. 1 and 2, the supporting portion 22 includes a first supporting rod 221 and a second supporting rod 222, ends of the first supporting rod 221 and the second supporting rod 222 are fixedly connected, the first supporting rod 221 and the second supporting rod 222 are arranged in different planes, and an included angle between the first supporting rod 221 and the second supporting rod 222 is an obtuse angle; the static contact 21 is fixedly connected with the connection position of the first supporting rod 221 and the second supporting rod 222; the static contact 21 is arranged on the bearing part 22, so that the static contact 21 can be accurately positioned and arranged, the movable contact 1 and the static contact 2 can be accurately positioned and contacted, the movable contact 2 and the static contact 2 can be better attached, and meanwhile, the displacement of the movable contact 1 relative to the static contact 2, which is horizontally displaced, can be reduced under the limitation of the bearing part 22, so that the generation of electric arcs is reduced, and the service life of the movable contact 2 and the service life of the static contact 2 are prolonged.

Referring to fig. 1 and 2, an end portion of the second support rod 222 departing from the first support rod 221 is arc-shaped, and a side of the second support plate departing from the arc-shaped projection 53 of the end portion is provided with a connecting assembly 5 for mounting the second support rod 222. The connecting assembly 5 comprises a clamping rod 51 fixedly connected to the second bearing rod 222, an included angle formed between the clamping rod 51 and the second bearing rod 222 is an acute angle, and a clamping cavity 52 for clamping and mounting the stationary contact 2 is formed between the clamping rod 51 and the second bearing rod 222; the side wall of the clamping plate facing the second bearing rod 222 is outwardly extended with a protrusion 53 with a right-angled vertical section, the protrusion 53 is fixedly connected with a connecting magnetic strip 54, the vertical section of the connecting magnetic strip 54 is arranged in an L shape, two mutually perpendicular side walls of the connecting magnetic strip 54 can be attached to the protrusion 53 and fixedly connected with the protrusion 53, the right-angled protrusion 53 can better install the clamping plate on electrical elements such as relays, and meanwhile, the protrusion 53 is fixedly connected with the connecting magnetic strip 54, so that the installation stability of the clamping plate is further improved; a first clamping groove 55 for installing and connecting the clamping plate is formed in the side wall of the clamping plate, which is far away from the bulge 53; a second clamping groove 56 is formed in the side wall of the clamping plate, which is far away from the protrusion 53, the second clamping groove 56 is positioned at the lower side of the first clamping groove 55, and the depth of the second clamping groove 56 is greater than that of the first clamping groove 55; the side walls of the first clamping groove 55 and the second clamping groove 56, which are far away from the opening, are both arc-shaped, and the arc-shaped bulge 53 of the second clamping groove 56 is larger than the arc-shaped bulge 53 of the first clamping groove 55; the first and second engaging grooves 55 and 56 facilitate mounting and connection of the engaging plate to other electrical components in an electrical appliance such as a relay.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A novel contact comprises a movable contact (1) and a fixed contact (2), and is characterized in that: the movable contact is characterized in that the fixed contacts (2) are provided with a plurality of fixed contacts, the length formed by the fixed contacts (2) is the same as that of the movable contact (1), the movable contact (1) comprises a movable contact (11) and a fixing rod (12) used for fixing the movable contact (11), the fixed contacts (2) comprise fixed contacts (21) and bearing parts (22) used for fixing the fixed contacts (21), the ends of the movable contact (11) and the fixed contacts (21) are arranged in opposite directions, the movable contact (11) or the fixed contacts (21) comprise conductive anti-melting layers (4), and the two conductive anti-melting layers (4) are arranged in opposite directions.

2. The novel contact of claim 1, wherein: two the lateral wall that electrically conducts mutual contact of anti-melt layer (4) sets up for the arc, and the arc arch (53) of two electrically conductive anti-melt layers (4) set up in opposite directions.

3. A novel contact according to claim 2, characterized in that: the conductive anti-melting layer (4) is a silver tin oxide layer.

4. The novel contact of claim 1, wherein: the moving contact (11) or the static contact (21) further comprises a conducting layer (3) arranged on one side of the conducting anti-melting layer (4), and the conducting layer (3) is made of silver-copper alloy.

5. The novel contact of claim 1, wherein: an arc-extinguishing plate (121) is fixedly connected to the side wall of one side of the fixed rod (12), the arc-extinguishing plate (121) is arranged in an arc shape, the arc-shaped protrusions (53) of the arc-extinguishing plate (121) are far away from the fixed rod (12) and are arranged, and the connecting point of the arc-extinguishing plate (121) and the fixed rod (12) is arranged on one side of the movable contact (1).

6. The novel contact of claim 5, wherein: the cross section of the arc-extinguishing plate (121) is gradually reduced from the end part of the arc-extinguishing plate (121) which is in mutual contact with the fixing rod (12) to the other end part of the arc-extinguishing plate (121).

7. The novel contact of claim 6, wherein: the upper end rigid coupling of dead lever (12) has the installation component, and the installation component is including setting up head rod (122) on dead lever (12), and the tip rigid coupling that head rod (122) deviates from dead lever (12) has second connecting rod (123), and head rod (122) and dead lever (12) slope set up, second connecting rod (123) and dead lever (12) parallel arrangement.

8. The novel contact of claim 7, wherein: the side wall of the second connecting rod (123) is provided with a plurality of mounting holes (1231).