CN217690866U - Switch - Google Patents

Abstract

The utility model provides a switch, belongs to low-voltage apparatus technical field, including moving contact, static contact and explosion chamber, the moving contact includes the moving contact piece that a pair of interval set up, and the static contact includes the link plate and with the electrically connected contact and the striking board of link plate, the contact perpendicular to link plate arranges, the striking board extends from a side of contact to the explosion chamber direction, and in closed position, a pair of moving contact piece is with the contact centre gripping, characteristics are: the fixed contact also comprises an arc striking angle electrically connected with the connecting plate, the arc striking angle comprises a fixed end and an extension end, the fixed end is positioned on one side of the contact far away from the arc striking plate, the extension end passes through a motion track of the moving contact separated from the fixed contact and extends towards the direction of the arc striking plate, when the moving contact is separated from the fixed contact, the pair of moving contact pieces respectively pass through two sides of the arc striking angle, and when an electric arc is generated between the moving contact and the fixed contact, a path of current flowing in the arc striking angle, the electric arc and the moving contact is U-shaped. The advantages are that: the influence degree of the static contact point by the electric arc is reduced, and the electric service life performance is improved.

Description

Switch

Technical Field

The utility model belongs to the technical field of low-voltage apparatus, concretely relates to switch.

Background

The existing switches include an automatic transfer switch, but are not limited to the automatic transfer switch, and in the technical field of electric appliances, the automatic transfer switch is used for providing an uninterruptible power supply for a load, and can be switched among different power supplies to ensure the continuity of power supply. Nowadays, modularization and miniaturization become development directions in the technical field of electric appliances, and the automatic change-over switch is used as an important device in a low-voltage electric appliance, and higher design requirements are also put forward in the aspects of modularization and miniaturization.

The prior art switch such as the above-mentioned clamping type contact assembly of the automatic transfer switch has the following defects: because the arc root can not be prevented from moving on the static contact before the arc enters the arc extinguish chamber in the switching-off process, a part of contacts can be burnt in the moving process of the arc root on the static contact, and finally the electrical service life performance is reduced. Other switches, such as circuit breakers, that employ a pinch contact assembly have similar problems.

In view of the above-mentioned prior art, there is a need for a reasonable improvement of existing switch structures. The applicant has therefore made an advantageous design, in the context of which the solution to be described below is made.

SUMMERY OF THE UTILITY MODEL

The task of the utility model is to provide a switch, it has add an arc striking angle, at the separating brake in-process, before electric arc got into the explosion chamber, enable electric arc root fast transfer to the arc striking angle on and can show the influence degree that reduces the static contact and receive electric arc, improve electric life performance.

The utility model discloses a task is accomplished like this, a switch, including moving contact, static contact and explosion chamber, the moving contact includes the movable contact spring that a pair of interval set up, the static contact includes the link plate and with link plate electric connection's contact and arc-striking board, the contact perpendicular to the link plate is arranged, the arc-striking board extends from a side of contact to the explosion chamber direction, and is a pair of at closed position the movable contact spring with the contact centre gripping, the static contact still includes an arc-striking angle of being connected with the link plate electricity, the arc-striking angle includes a stiff end and an extension end, the stiff end is located one side of keeping away from the arc-striking board of contact, the extension end passes the moving trajectory that moving contact and static contact separated and extends to the arc-striking board direction, and when moving contact and static contact separate, a pair of movable contact passes through from the both sides at arc-striking angle respectively, and when producing electric arc between moving contact and the static contact, the route that the electric current circulated in arc-striking angle, moving contact and electric arc is the U-shaped.

In a specific embodiment of the present invention, the connecting plate has a mounting seat, a connecting block is disposed on the mounting seat in a state perpendicular to the mounting seat, one end of the connecting block is fixed to the mounting seat, and the contact is formed on the other end of the connecting block; the end part of the arc striking plate is bent and extends towards the mounting seat to be fixed with the mounting seat.

In another specific embodiment of the present invention, an arc-striking angle fixing block is further disposed on the mounting seat, the arc-striking angle fixing block is located on one side of the contact, which is away from the arc-striking plate, the top of the arc-striking angle fixing block is fixed to the fixed end of the arc-striking angle, and the top of the contact is spaced from the arc-striking angle.

In another specific embodiment of the present invention, the arc-striking angle fixing block is formed on the connecting block, and the height of the arc-striking angle fixing block is higher than that of the contact, so that a gap exists between the extension end and the contact.

In another specific embodiment of the present invention, the end of the arc striking plate is bent and extends toward the mounting base to form a pair of mounting legs, and the lower ends of the pair of mounting legs are folded and unfolded to form a mounting end for fixing with the mounting base.

The utility model discloses a still have a concrete embodiment, any one among the installation end winds to one side of the run-on board of connecting block dorsad after climbing on the mount pad to bend and extend the constitution run-on angle fixed block to the direction of keeping away from the mount pad, just the height that highly is higher than the contact of run-on angle fixed block, the top of run-on angle fixed block with the stiff end at run-on angle is fixed.

In yet another specific embodiment of the present invention, an arc striking plate is extended from the arc striking plate, and the arc striking plate extends toward the extension end of the arc striking angle.

In a more specific embodiment of the present invention, the arc striking plate extends from one side of the contact to the arc cutting area of the outermost arc chute blade of the arc chute close to the side of the stationary contact.

The utility model discloses owing to adopted above-mentioned structure, the beneficial effect who has: firstly, in the direction of separating a moving contact from a static contact, after the moving contact is separated from the static contact, a pair of moving contact pieces respectively pass through two sides of an arc striking angle, when the moving contact and the static contact are opened, an electric arc is generated between contacts, and an arc root quickly moves to the arc striking angle because the arc striking angle passes through the motion track of separating the moving contact from the static contact, so that the electric arc is prevented from being burnt on the contacts; secondly, because the run-on angle passes through the run-on angle mount pad realization of connecting block one side and is connected with the mount pad electricity for after producing the electric arc, the current direction on the run-on angle is the same with electric arc advancing direction, because the run-on angle produces the magnetic field for perpendicular paper faces outwards in electric arc place region, in this magnetic field, electric arc receives along electric arc advancing direction's electrodynamic force F, has accelerated the speed that electric arc moved to the explosion chamber.

Drawings

Fig. 1a is a perspective view of a stationary contact of the switch of the present invention.

Fig. 1b is an exploded schematic view of a stationary contact of the switch of the present invention.

Fig. 2 is a view of a contact quenching module of the switch of the present invention.

Fig. 3a is the internal schematic diagram of the contact arc extinguishing module when the switch is located at the second power switch-on position.

Fig. 3b is the internal schematic view of the contact arc extinguishing module when the switch is located at the time of the first power supply and the second power supply being both off.

Fig. 3c is the internal schematic diagram of the contact arc extinguishing module when the switch is located at the first power switch-on position.

Fig. 4 is a schematic diagram of the switch of the present invention.

Fig. 5 is an exploded schematic view of another embodiment of a static contact of the switch of the present invention.

In the figure: 1. the moving contact comprises a moving contact, 11 moving contact pieces, 111 first contact ends and 112 second contact ends; 2. the connector comprises a fixed contact, a 21 connecting plate, a 211 mounting seat, a 2111 mounting seat mortise, a 22 contact, a 221 contact, a 222 groove, a 2211 guide inclined plane, a 2212 contact plane, a 23 run-on plate, a 231 run-on sheet, a 24 run-on angle, a 241 fixed end, a 242 extending end, a 25 mounting pin, a 251 mounting end, a 253 opening, a 26 connecting block, a 261 connecting block tenon, a 262 connecting block right end fixing plane and a 27 run-on angle fixing block; 3. arc extinguishing chamber, 31 arc extinguishing grid sheet, 311 arc cutting area; 4. a load wiring terminal; 5. soft connection; 6. a sampling connecting terminal; 7. riveting; 100. a base; 200. a first power connection terminal; 300. and a second power connection terminal.

Detailed Description

The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings, but the description of the embodiments is not intended to limit the technical solutions, and any changes made in the form of the present invention rather than the essential changes should be considered as the protection scope of the present invention.

In the following description, any concept relating to the directions or orientations of up, down, left, right, front, and rear is based on the position shown in the corresponding drawings, and thus should not be construed as particularly limiting the technical solution provided by the present invention.

Referring to fig. 1a to 3c, the present invention relates to a switch, in particular to a dual power supply changeover switch, including a contact arc extinguishing module, the contact arc extinguishing module is composed of a base 100, a moving contact 1, a first power source static contact, a second power source static contact, an arc extinguishing chamber 3 and a load connecting terminal 4, the first power source static contact and the second power source static contact are both fixed on the base 100, the moving contact 1 is rotatably pivoted on the base 100, the first power source static contact forms a first power connecting terminal 200 at the end portion extending out of the base 100, the second power source static contact forms a second power connecting terminal 300 at the end portion extending out of the base 100, the load connecting terminal 4 is fixed on the base 100, and the moving contact 1 is connected with the load connecting terminal 4 through a flexible connection 5.

Since the first and second power source stationary contacts have substantially the same structure, and only differ in that the connecting plate 21 of the second power source stationary contact is longer than the connecting plate 21 of the first power source stationary contact, the applicant hereinafter refers to the first and second power source stationary contacts collectively as the stationary contact 2.

Referring to fig. 1 to 3c, the movable contact 1 includes a pair of movable contacts 11 disposed at an interval, the stationary contact 2 includes a linking plate 21, and a contact 22 and an arc striking plate 23 electrically connected to the linking plate 21, the contact 22 is disposed perpendicular to the linking plate 21, the arc striking plate 23 is fixed on the linking plate 21 and extends from one side of the contact 22 to the direction of the arc extinguishing chamber 3, and specifically, the arc striking plate 23 extends from one side of the contact 22 to the arc cutting region 311 of the outermost arc extinguishing grid sheet 31 of the arc extinguishing chamber 3 on the side close to the stationary contact 2. In the closed position, the pair of movable contacts 11 hold the contacts 22.

The utility model provides a technical scheme's technical essential is: the structure system of the static contact 2 further includes an arc starting angle 24 electrically connected to the connecting plate 21, the arc starting angle 24 includes a fixed end 241 and an extending end 242, the fixed end 241 is located on one side of the contact 22 far from the arc starting plate 23, the extending end 242 extends towards the arc starting plate 23 through a motion track of the moving contact 1 separated from the static contact 2, when the moving contact 1 is separated from the static contact 2, the pair of moving contacts 11 respectively pass through two sides of the arc starting angle 24, and when an electric arc is generated between the moving contact 1 and the static contact 2, a flow path of the current in the arc starting angle 24, the electric arc and the moving contact 1 is U-shaped, as shown in fig. 4.

The connection plate 21 has a mounting seat 211, a connection block 26 is disposed on the mounting seat 211 in a state of being perpendicular to the mounting seat 211, one end of the connection block 26 is fixed to the mounting seat 211, and the contact 22 is formed on the other end of the connection block 26.

Specifically, in the present embodiment, the end portions of the arc plate 23 are bent and extended toward the mounting seat 211 to form a pair of mounting legs 25, the pair of mounting legs 25 are fixed to the mounting seat 211, the space between the pair of mounting legs 25 is formed as an opening 253, and the contact 22 corresponds to the opening 253. In this embodiment, the lower ends of the pair of mounting legs 25 are folded to form a mounting end 251 for fixing with the mounting seat 211. In this embodiment, the arc striking plate 23 and the mounting seat 211 are fixed in the following manner: rivets 7 are inserted through mounting ends 251 of the pair of mounting legs 25 to secure the mounting ends 251 to the mounting block 211. Of course, the fixing of the arc striking plate 23 and the mounting seat 211 is not limited to the foregoing embodiment, and may be: the ends of the pair of mounting legs 25 extending to the mounting base 211 are not provided with the mounting ends 251 formed by bending, but a pair of holes or grooves are formed at positions of the mounting base 211 corresponding to the two mounting legs 25, and the mounting legs 25 are riveted after being engaged with the holes or grooves. A tab 231 extends from the tab 23, in this embodiment, the tab 231 corresponds to the upper portion of the opening 253, and the tab 231 extends toward the extending end 242 of the tab corner 24.

Still be provided with an arc ignition angle fixed block 27 on the mount pad 211, arc ignition angle fixed block 27 is located one side of keeping away from arc ignition plate 23 of contact 22, the top of arc ignition angle fixed block 27 with the stiff end 241 of arc ignition angle 24 is fixed, just the top of contact 22 with arc ignition angle 24 interval sets up. In the present embodiment, the arc angle fixing block 27 is formed on the connecting block 26, and the height of the arc angle fixing block 27 is higher than that of the contact 22, that is, on the connecting block 26, the top of the block forming the arc angle fixing block 27 is higher than that of the block forming the contact 22, so that the top of the connecting block 26 is stepped, so that after the arc angle 24 is fixed to the arc angle fixing block 27 through the fixing end 241, a gap is formed between the bottom surface of the arc angle 24 facing the contact 22 and the top surface of the contact 22, and a gap is formed between the extending end 242 of the arc angle 24 and the contact 22, that is, the bottom surface of the arc angle 24 facing the contact 22 and the top surface of the contact 22 are not in contact.

Which is arranged in sequence with the contact 22 on the connecting block 26 in the direction of travel of the arc.

A contact 221 is fixed to each of the front and rear surfaces corresponding to the contact 22, and the contact 221 is a silver alloy contact. A groove 222 for compensating the thickness of the contact 221 and soldering the contact 221 to the contact 22 is formed in each of the front and rear sides of the contact 22 and at a position corresponding to the contact 221. The outward facing surface of the contact 221 is formed with a guiding inclined surface 2211 and a contact plane 2212, and the guiding inclined surface 2211 and the contact plane 2212 are consistent with the moving direction of the contact closing of the movable contact 1 and the fixed contact 2 of the dual power transfer switch, in the area of the guiding inclined surface 2211, the distance between the contact 221 located on the front side surface of the contact 22 and the contact 221 located on the rear side surface of the contact 22 is narrowed and widened along the moving direction of the contact closing of the movable contact 1 and the fixed contact 2, and in the area of the contact plane 2212, the distance between the contact 221 located on the front side surface of the contact 22 and the contact 221 located on the rear side surface of the contact 22 is equal, that is, equal distance. In the closing motion process of the moving contact 1 and the static contact 2 of the dual power transfer switch, the guiding inclined plane 2211 is used for guiding the contact of the moving contact 1 and the static contact 2, and when the moving contact 1 and the static contact 2 are in place, the moving contact 1 stays on the contact plane 2212 to realize reliable contact with the contact 22.

As shown in fig. 1b, the stationary contact 2 further includes a sampling terminal 6 riveted to the connecting plate 21.

The fixing of the connecting block 26 and the mounting seat 211 is specifically as follows: a connecting block tenon 261 is formed on the downward side of the left end of the connecting block 26, and a mounting seat mortise 2111 is formed on the mounting seat 211 at a position corresponding to the connecting block tenon 261, and the connecting block tenon 261 and the mounting seat mortise 2111 are in mortise-tenon engagement with each other. The lower surface of the right end of the connecting block 26 is a connecting block right end fixing surface 262, and the connecting block right end fixing surface 262 is welded to the mounting seat 211. In this embodiment, the connecting block tenon 261 has a rectangular cross-sectional shape, and accordingly, the mounting seat mortise 2111 has a rectangular shape. Of course, the cross-sectional shape of the connecting block tenon 261 can be designed to be circular, that is, the three-dimensional shape of the connecting block tenon 261 is a cylinder, and the cross-sectional shape of the corresponding mounting seat mortise 2111 is circular, that is, a circular hole.

Referring to fig. 3a to fig. 3c, the dual power transfer switch of the present invention switches from the second power switch-on position to the first power switch-on position:

as shown in fig. 3a, the dual power transfer switch is located at a second power closing position, a pair of moving contacts 11 of the moving contact 1, which are arranged at intervals, form a clamping assembly, in the figure, an upper end of the moving contact 1 forms a first contact end 111, a lower end of the moving contact 1 forms a second contact end 112, silver alloy contacts on walls facing each other of the pair of moving contacts 11 located at the second contact end 112 contact with a second power stationary contact, that is, a contact 221 of a stationary contact 2 located at a lower position in the figure, the moving contacts 11 are clamped at two sides of the contact 221, a second power loop is turned on, and the first power loop is turned off.

As shown in fig. 3b, under the driving of the operating mechanism, the movable contact 1 rotates clockwise, the pair of movable contact pieces 11 located at the second contact end 112 is separated from the contact 221 and passes through the two sides of the arc ignition angle 24, and the movable contact 1 rotates to the middle disconnection position, at this time, the movable contact 1 is disconnected from both the first power source fixed contact and the second power source fixed contact.

As shown in fig. 3c, under the driving of the operating mechanism, the movable contact 1 continues to rotate clockwise to the first power supply switching-on position, the pair of movable contact pieces 11 of the movable contact 1 are clamped at both sides of the stationary contact, that is, the silver alloy contacts on the walls of the pair of movable contact pieces 11 at the position of the first contact end 111 facing each other contact the contact 221 of the stationary contact of the first power supply, the first power supply loop is switched on, and the second power supply loop is switched off.

The action process of the dual power transfer switch for switching from the first power switch-on position to the second power switch-on position is opposite to the above process, and the description is not repeated.

In the present embodiment, one end of the arc ignition angle 24 is fixed to the arc ignition angle mounting block 27, on one hand, the arc ignition angle 24 is fixed, on the other hand, one end of the arc ignition angle 24 (i.e. the left end in the position state shown in fig. 1a and 1 b) is electrically connected to the mounting base 211, and the other end of the arc ignition angle 24 (i.e. the right end in the position state shown in fig. 1a and 1 b) extends to the arc ignition plate 23 through the motion track of the movable contact 1 separated from the stationary contact 2, as shown in fig. 4.

In the direction of separating the moving contact 1 from the static contact 2, after the moving contact 1 is separated from the static contact 2, the pair of moving contact pieces 11 pass through two sides of the arc striking angle 24 respectively, when the moving contact 1 and the static contact 2 are opened, an electric arc is generated between the contacts, and as the arc striking angle 24 passes through the motion track of the separation of the moving contact 1 and the static contact 2, an arc root moves onto the arc striking angle 24 quickly, so that the burning of the electric arc on the contact 22 is avoided. Further, since the arc ignition angle 24 is electrically connected to the mounting seat 211 through the arc ignition angle mounting seat 27 located on the left side of the contact 22, after an arc is generated, a current flow path in the arc ignition angle 24, the arc and the movable contact 1 is U-shaped, as shown in fig. 4, since a magnetic field generated by the arc ignition angle 24 in a region where the arc is located is perpendicular to the paper surface and faces outward, in the magnetic field, the arc is subjected to an electrodynamic force F along the arc traveling direction, and the speed of moving the arc to the arc extinguishing chamber 3 is increased.

Of course, the fixing manner of the arc-striking angle 24 of the present invention is not limited to the above-mentioned embodiment, as shown in fig. 5, any one of the mounting ends 251 winds to one side of the connecting block 26, which faces away from the opening 253, after climbing on the mounting seat 211, and extends to the direction away from the mounting seat 211 after bending to form the arc-striking angle fixing block 27, and the height of the arc-striking angle fixing block 27 is higher than that of the contact 22, and the top of the arc-striking angle fixing block 27 is fixed to the fixing end 241 of the arc-striking angle 24. Similarly, since the height of the arc-striking angle fixing block 27 is higher than that of the contact 22, after the arc-striking angle 24 is fixed to the arc-striking angle fixing block 27 through the fixing end 241, a space is formed between the bottom surface of the arc-striking angle 24 facing the contact 22 and the top surface of the contact 22, that is, the bottom surface of the arc-striking angle 24 facing the contact 22 is not in contact with the top surface of the contact 22.

Of course, in order to ensure that the bottom surface of the arc striking angle 24 facing the contact 22 does not contact the top surface of the contact 22, the bottom surface of the arc striking angle 24 facing the contact 22 (e.g., the bottom surface of fig. 1 a) may be arranged in a step shape, and the position of the extended end 242 may be recessed from the position of the fixed end 241.

Claims (8)

1. A switch comprises a moving contact (1), a fixed contact (2) and an arc extinguish chamber (3), wherein the moving contact (1) comprises a pair of moving contacts (11) which are arranged at intervals, the fixed contact (2) comprises a connecting plate (21), and a contact (22) and an arc striking plate (23) which are electrically connected with the connecting plate (21), the contact (22) is arranged perpendicular to the connecting plate (21), the arc striking plate (23) extends from one side of the contact (22) to the direction of the arc extinguish chamber (3), and in a closed position, the pair of moving contacts (11) clamps the contact (22), and the switch is characterized in that: the static contact (2) further comprises an arc striking angle (24) electrically connected with the connecting plate (21), the arc striking angle (24) comprises a fixed end (241) and an extending end (242), the fixed end (241) is located on one side, far away from the arc striking plate (23), of the contact (22), the extending end (242) extends towards the arc striking plate (23) through a motion track formed by the separation of the moving contact (1) and the static contact (2), when the moving contact (1) is separated from the static contact (2), the pair of moving contact pieces (11) respectively pass through the two sides of the arc striking angle (24), and when an electric arc is generated between the moving contact (1) and the static contact (2), a path of current flowing in the arc striking angle (24), the electric arc and the moving contact (1) is in a U shape.

2. A switch according to claim 1, wherein: the connecting plate (21) is provided with a mounting seat (211), a connecting block (26) is arranged on the mounting seat (211) in a state of being perpendicular to the mounting seat (211), one end of the connecting block (26) is fixed with the mounting seat (211), and the contact (22) is formed on the other end of the connecting block (26); the end part of the arc striking plate (23) is bent and extends towards the mounting seat (211) to be fixed with the mounting seat (211).

3. A switch according to claim 2, wherein: still be provided with an arc ignition angle fixed block (27) on mount pad (211), arc ignition angle fixed block (27) are located one side of keeping away from arc ignition board (23) of contact (22), the top of arc ignition angle fixed block (27) with stiff end (241) of arc ignition angle (24) are fixed, just the top of contact (22) with arc ignition angle (24) interval sets up.

4. A switch according to claim 3, wherein: the arc ignition angle fixing block (27) is formed on the connecting block (26), and the height of the arc ignition angle fixing block (27) is higher than that of the contact (22), so that a gap exists between the extending end (242) and the contact (22).

5. A switch according to claim 2, wherein: the end parts of the arc striking plates (23) are bent and extend towards the mounting base (211) to form a pair of mounting feet (25), and the lower ends of the pair of mounting feet (25) are folded and unfolded to form a mounting end (251) fixed with the mounting base (211).

6. A switch according to claim 5, characterized in that: any one of the mounting ends (251) climbs on the mounting seat (211) and then winds to one side, back to the arc ignition plate (23), of the connecting block (26), bends and then extends in the direction away from the mounting seat (211) to form an arc ignition angle fixing block (27), the height of the arc ignition angle fixing block (27) is higher than that of the contact (22), and the top of the arc ignition angle fixing block (27) is fixed with the fixing end (241) of the arc ignition angle (24).

7. A switch according to claim 2, wherein: an arc striking sheet (231) is arranged on the arc striking plate (23) in an extending mode, and the arc striking sheet (231) extends towards the extending end (242) of the arc striking angle (24).

8. A switch according to claim 1, wherein: the arc striking plate (23) extends from one side of the contact (22) to an arc cutting area (311) of the outermost arc extinguishing grid sheet (31) on the side of the arc extinguishing chamber (3) close to the static contact (2).

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