CN212277073U

CN212277073U - Contact device and automatic change-over switch electric appliance

Info

Publication number: CN212277073U
Application number: CN202021133610.6U
Authority: CN
Inventors: 唐军; 朱熔吾; 魏鹏
Original assignee: SHENZHEN TAIYONG ELECTRICAL TECHNOLOGY CO LTD
Current assignee: SHENZHEN TAIYONG ELECTRICAL TECHNOLOGY CO LTD
Priority date: 2020-06-17
Filing date: 2020-06-17
Publication date: 2021-01-01
Anticipated expiration: 2030-06-17

Abstract

The utility model relates to a contact device and an automatic transfer switching device, the contact device comprises a shell, a moving contact component which can be rotatably arranged in the shell, a common power supply static contact component and a standby power supply static contact component which are arranged in the shell; the moving contact component comprises a support and a moving contact conductive bar arranged on the support, and the moving contact conductive bar is connected with the load wiring terminal through a connecting piece; the first end of the moving contact conducting bar is provided with a common contact and a standby contact on opposite sides respectively, and the moving contact conducting bar can drive the common contact to be in contact conduction with the common power supply static contact assembly or drive the standby contact to be in contact conduction with the standby power supply static contact assembly when rotating. The contact device has the advantages of high contact conversion speed, greatly shortened conversion time, effectively reduced manufacturing cost, reduced switch overall size and capability of meeting the requirement of a modern power supply system on power supply occasions for rapidly switching power supplies.

Description

Contact device and automatic change-over switch electric appliance

Technical Field

The utility model relates to a switching electrical equipment technical field especially relates to a contact device and automatic change-over switch electrical apparatus.

Background

The automatic change-over switch electric appliance is a common low-voltage electric appliance, is commonly used in important power distribution occasions, is used for switching two paths of power supplies, ensures that the common power supply is quickly switched to a standby power supply when the common power supply fails in the power supply process, and ensures the normal power supply of a load end.

The existing PC-level automatic transfer switching equipment usually adopts a group of clapper type contacts with a common side wire inlet end and a standby side wire inlet end which are independent respectively, and has high cost, low transfer speed, large volume and small opening distance.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a contact device and automatic transfer switch electrical apparatus.

The utility model provides a technical scheme that its technical problem adopted is: the contact device comprises a shell, a movable contact component, a common power supply static contact component and a standby power supply static contact component, wherein the movable contact component is rotatably arranged in the shell;

the moving contact component comprises a support and a moving contact conductive bar arranged on the support, and the moving contact conductive bar is connected with a load wiring terminal through a connecting piece;

the first end of the moving contact conducting bar is provided with a common contact and a standby contact on opposite sides respectively, and the moving contact conducting bar can drive the common contact to be in contact conduction with the common power supply static contact assembly or drive the standby contact to be in contact conduction with the standby power supply static contact assembly when rotating.

Preferably, a rocker arm and a connecting rod are further arranged in the shell;

one end of the connecting rod is connected with the rocker arm, the other end of the connecting rod is connected with the support, and the rocker arm swings to drive the support to rotate.

Preferably, the support is provided with a shaft hole for a rotating shaft to penetrate through so as to be installed in the shell;

the connecting rod is a U-shaped connecting rod, the extending end of the U-shaped connecting rod is respectively arranged on the rocker arm and the support, and the rocker arm swings to drive the support to rotate around the rotating shaft.

Preferably, a positioning groove is arranged at the first end of the support; the bottom of the positioning groove is provided with a first positioning hole;

a second positioning hole is formed in the second end of the moving contact conducting bar;

the moving contact component also comprises a fastener which is used for penetrating the first positioning hole and the second positioning hole so as to position and install the moving contact conducting bar on the support.

Preferably, a second end of the support, which is provided with a first end extending obliquely downwards, is provided with a limit groove; the notch of the limiting groove penetrates through the upper surface and the lower surface of the support;

the moving contact component also comprises a first hoop arranged in the limiting groove, and a second hoop is also arranged in the shell and is positioned obliquely below the second end of the support;

the first clamp and the second clamp are both in T-shaped structures and comprise positioning parts and clamping parts connected with the positioning parts; the buckling part is provided with a notch;

the first clamp and the second clamp are mutually crossed and vertically meshed, the peripheries of buckling parts of the first clamp and the second clamp are sleeved with pressure springs, and the pressure springs are limited between the positioning parts of the first clamp and the second clamp.

Preferably, two sides of the limit groove are provided with first through holes;

the positioning part of the first hoop is provided with a second through hole matched with the first through hole;

and the pin shaft penetrates through the first through hole and the second through hole so as to rotatably install the first clamp in the limiting groove.

Preferably, a base plate is further arranged in the shell and located obliquely below the second end of the support, and the positioning portion of the second clamp abuts against the base plate.

Preferably, an arc extinguish chamber is further arranged in the shell, the contacts of the common power supply static contact assembly and the standby power supply static contact assembly are located in the arc extinguish chamber, and the opening of the arc extinguish chamber faces the moving contact assembly.

Preferably, an arc isolating piece is further arranged between the common power supply fixed contact assembly and the standby power supply fixed contact assembly, and the arc isolating piece comprises a plate-shaped main body facing the movable contact assembly.

An automatic transfer switching apparatus comprises the contact device.

Implement the utility model discloses following beneficial effect has: the contact device has the advantages of high contact conversion speed, greatly shortened conversion time, effectively reduced manufacturing cost, reduced switch overall size and capability of meeting the requirement of a modern power supply system on power supply occasions for rapidly switching power supplies.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is a schematic structural view of a contact device according to the present invention;

fig. 2 is a schematic view of the internal three-dimensional structure of the contact device of the present invention;

fig. 3 is an exploded view of the contact arrangement of the present invention;

fig. 4 is an exploded view of the structure of the moving contact assembly of the present invention;

fig. 5 is a schematic structural diagram of the support of the present invention;

fig. 6 is a schematic structural view of the movable contact assembly of the present invention cooperating with the rocker arm and the pressure spring;

fig. 7 is a schematic structural diagram of a common power supply fixed contact assembly of the present invention;

fig. 8 is a schematic structural view of the movable contact assembly of the present invention contacting with a stationary contact assembly of a common power supply;

fig. 9 is a schematic view of the contactless structure of the moving contact assembly of the present invention;

fig. 10 is a schematic structural view of the movable contact assembly of the present invention contacting with the stationary contact assembly of the standby power supply;

fig. 11 is a schematic structural diagram of the automatic transfer switching apparatus of the present invention.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "upper", "lower", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are configured and operated in specific directions based on the directions or positional relationships shown in the drawings, and are only for convenience of describing the present invention, but do not indicate that the device or element referred to must have a specific direction, and thus, should not be construed as limiting the present invention.

It is also noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," "disposed," and the like are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. When an element is referred to as being "on" or "under" another element, it can be "directly" or "indirectly" on the other element or intervening elements may also be present. The terms "first", "second", "third", etc. are only for convenience in describing the present technical solution, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of such features. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

As shown in fig. 1-10, the contact device of the present invention includes a housing 1, the housing 1 is an insulating housing, and includes a first housing and a second housing, which are detachable, and opposite sides of the first housing and the second housing can be provided with screw holes, and the first housing and the second housing are connected by screw threads. Or, a hole is formed in the first shell, a positioning column is correspondingly arranged on the second shell, and the positioning column is inserted into the hole and installed in a matched mode. Or the first shell and/or the first shell are/is provided with a pressing plate, a pressing wheel and other structures which are fixedly installed in a pressing mode. Or, the fixing and installation can also be realized in a buckling mode. It is understood that the fixing manner is various and is not limited herein. Furthermore, the shell can be made of high-temperature-resistant, stable and high-hardness high-molecular polymer materials.

Furthermore, the device also comprises a movable contact component 2 which is rotatably arranged in the shell 1, and a common power supply static contact component 3, a standby power supply static contact component 4, a load wiring terminal 5, a rocker arm 7 and a connecting rod 8 which are arranged in the shell 1.

The common power static contact component 3 and the standby power static contact component 4 are respectively arranged at the upper and lower opposite sides of the left end in the shell 1, the end part of one side opposite to the upper and lower opposite sides is provided with a contact, one side far away from the contact is fixed in the shell 1 through a bolt, the load wiring terminal 5 is positioned at the upper right side in the shell 1, and one end part of the load wiring terminal is fixed in the shell 1 through a bolt. As shown in fig. 7, the stand-by power static contact assembly 4 has a contact 41 on its contact part, and the common power static contact assembly 3 and the stand-by power static contact assembly 4 have substantially the same structure and are arranged symmetrically with respect to each other.

Further, the movable contact assembly 2 includes a support 21 and a movable contact conductive bar 22 disposed on the support 21, and the movable contact conductive bar 22 is connected to the load connection terminal 5 through the connection member 6. The connecting piece 6 is a soft wire.

The movable contact conducting bar 22 is a substantially elongated flat plate structure, and a first end thereof is located between the contacts of the common power supply static contact assembly 3 and the standby power supply static contact assembly 4. The common contact 221 and the backup contact 222 are respectively disposed on two opposite sides of the first end, the common contact 221 and the backup contact 222 are made of silver alloy and are fixed to the end of the movable contact conductive bar 22 by welding, further, the movable contact conductive bar 22 is disposed with a low step, and the common contact 221 and the backup contact 222 are disposed on the low step.

When the movable contact conducting bar 22 rotates, the common contact 221 may be driven to contact and conduct with the common power source static contact component 3, or the standby contact 222 may be driven to contact and conduct with the standby power source static contact component 4. It can be understood that the moving contact assembly 2, the common power static contact assembly 3 and the standby power static contact assembly 4 form a single-pole double-throw contact design scheme.

The first end of the support 21 is provided with a positioning groove 213, the bottom of the positioning groove 213 is provided with a first positioning hole 2131, and the second end of the movable contact conducting bar 22 away from the second end is provided with a second positioning hole 223.

The movable contact assembly 2 further includes a fastener 24 for passing through the first positioning hole 2131 and the second positioning hole 223 to fix the movable contact conductive bar 22 to the support 21. Further, the first positioning hole 2131 and the second positioning hole 223 may be screw holes, and the fastening member 24 may be a screw.

In this embodiment, the swing arm 7 is disposed on the upper portion of the support 21, one end of the connecting rod 8 is connected to the swing arm 7, and the other end is connected to the support 21, so that the swing arm 7 rotates the support 21 when swinging.

Further, this rocking arm 7 includes the barrel, and the barrel middle part is equipped with the quad slit, supplies a square shaft installation, drives rocking arm 7 swing and then drives moving contact component 2 swing.

Furthermore, the support 21 is provided with a shaft hole 211 through which a rotating shaft 23 passes to be installed in the housing 1, the link 8 is a U-shaped link, and the extending ends of the U-shaped link are respectively installed on the rocker arm 7 and the support 21.

Further, this rocking arm 7 includes the barrel, is equipped with the protruding structure that extends along common power static contact subassembly 3 and stand-by power supply static contact subassembly 4 direction on the barrel, and this protruding structure is semiellipse shape for whole rocking arm 7 is tear drop type structure, is equipped with the round hole on this protruding structure, is located constant head tank 213 below on this support 21 and is equipped with round hole 212, and the upside of this U type connecting rod stretches out the end and packs into the round hole of protruding structure, and the downside stretches out the end and changes over into round hole 212, and rocking arm 7 swings and drives support 21 and revolve axle 23 and rotate. It can be understood that the driving force for rotating the moving contact assembly 2 is derived from the clockwise and counterclockwise rotation of the rocker arm 7 to drive the U-shaped link.

When the moving contact assembly 2 is just in time division, the semi-elliptical convex structural characteristic gap on the rocker arm 7 is eliminated firstly through the semi-elliptical convex structural characteristic gap on the rocker arm 7 when the driving force is transmitted through the rocker arm 2, so that the moving contact assembly 2 has certain initial speed at the moment of starting to move, and the purpose of improving the contact just-dividing speed is achieved.

Furthermore, a limit groove 214 is formed in a second end, extending obliquely downwards, of the first end of the support 21, a notch of the limit groove 214 penetrates through the upper surface and the lower surface of the support 21, the movable contact assembly 2 further comprises a first clamp 25 arranged in the limit groove 214, a second clamp 9 is further arranged in the shell 1 and obliquely downwards at the second end of the support 21, and the first clamp 25 and the second clamp 9 are both in a T-shaped structure and comprise a positioning portion and a buckling portion connected with the positioning portion; the clamping part is far away from one side of the positioning part, a notch is formed in one side of the positioning part, the first clamp 25 and the second clamp 9 are perpendicularly meshed in a mutually crossed mode, a pressure spring 10 is sleeved on the periphery of the clamping part of the first clamp and the second clamp, and the pressure spring 10 is limited between the positioning part of the first clamp and the positioning part of the second clamp.

With reference to fig. 3 and 4, the first clip 25 includes a positioning portion 251 and a buckling portion 252 extending from the middle of the positioning portion 251, and two sides of the positioning portion 251 protrude from two sides of the buckling portion 252, so as to limit the pressure spring 10 in the following process. Furthermore, two sides of the limiting groove 214 are provided with a first through hole 2141, the positioning portion 251 of the first clip 25 is provided with a second through hole 2511 matched with the first through hole 2141, and a pin 26, the pin 26 is inserted into the first through hole 2141 and the second through hole 2511 to rotatably mount the first clip 25 in the limiting groove 214. The pin 26 may be a cylindrical rivet.

The second clamp 9 includes a positioning portion 91 and a buckling portion 92 provided in the middle of the positioning portion 91 and extending therefrom, and two sides of the positioning portion 91 protrude from two sides of the buckling portion 92, so as to limit the pressure spring 10 in the following process. The positioning portion 91 may or may not have a through hole.

Furthermore, a backing plate 11 is further arranged in the casing 1 and obliquely below the second end of the support 21, the backing plate 11 is roughly in an "L" shape, the positioning portion 91 of the second clamp 9 abuts against the backing plate 11, and specifically, the side edge of the positioning portion 91 is clamped inside the bent portion of the backing plate 11 in parallel. A backing plate 11 is arranged in the insulating shell 1 and mainly plays a role in reducing friction and preventing abrasion.

It can be understood that the first clamp 25 can rotate flexibly along the pin 26 in the limiting groove 214, and is inserted into the second clamp 9 mounted on the backing plate 11 to limit the tangential direction without limiting the axial movement thereof, so that the compression spring 10 can apply the eccentric moment required for maintaining the stable closing position of the movable contact assembly 2 along the axial direction of the first clamp 25.

After the compression spring 10 is installed on the first hoop 25, the expansion force of the compression spring 10 is transmitted to the support 21 through the first hoop 25, a moment is generated on the support 21, an eccentric stress mode is generated around the rotating shaft 23, and a holding force is provided when the moving contact assembly 2 is in contact and closed with the common power supply static contact assembly 3 and the standby power supply static contact assembly 4, so that a circuit is kept in a connected state.

Further, an arc extinguish chamber 12 is further arranged in the shell 1, contacts of the common power supply static contact component 3 and the standby power supply static contact component 4 are located in the arc extinguish chamber 12, and an opening of the arc extinguish chamber 12 faces the moving contact component 2. The switching-on and switching-off actions of the moving contact component 2, the common power source static contact component 3 and the standby power source static contact component 4 are all completed in the arc extinguish chamber, and the arc is extinguished by the arc extinguish chamber.

Further, an arc isolating sheet 13 is further arranged between the common power supply static contact component 3 and the standby power supply static contact component 4, the arc isolating sheet 13 comprises a plate-shaped main body, and the plate-shaped main body faces the moving contact component 2.

Referring to fig. 8, 9 and 10, when the movable contact conducting bar 22 of the movable contact assembly 2 contacts the stationary contact assembly 3 of the common power supply, the common power supply is connected to the load, the first clamp 25 is pushed by the compression spring 10 to abut against the support 21 of the movable contact assembly 2 and apply a pressure, and a direction of the pressure and a force-bearing point of the support 21 form a certain included angle with the rotating shaft 23, so that the movable contact assembly 2 generates an eccentric rotation moment around the rotating shaft 23 to provide a holding force when the movable contact assembly 2 and the stationary contact assembly 3 of the common power supply are closed.

When the movable contact conducting bar 22 on the movable contact component 2 contacts with the standby power supply static contact component 4, the standby power supply is connected with the load at the moment, the first hoop 25 is pushed by the pressure spring 10 to prop against the support 21 in the movable contact component 2 and apply a pressure, and the direction of the pressure and the stress point of the support 21 form a certain included angle with the rotating shaft 23, so that the movable contact component 2 generates an eccentric rotating moment around the rotating shaft 23, and a holding force is provided when the movable contact component 2 and the standby power supply static contact component 4 are closed.

As shown in fig. 11, the automatic transfer switching apparatus of the present application includes the above-mentioned contact device.

The contact device and the automatic change-over switch electric appliance overcome the defects in the prior art, greatly shorten the contact change-over time of the change-over switch electric appliance, effectively reduce the cost and the whole size of a switch, and meet the requirement of a modern power supply system on power supply occasions for quickly switching over a power supply.

It is to be understood that the foregoing examples merely represent preferred embodiments of the present invention, and that the description thereof is more specific and detailed, but not intended to limit the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims

1. A contact device comprises a shell (1), and is characterized by also comprising a movable contact component (2) which is rotatably arranged in the shell (1), a common power supply static contact component (3) and a standby power supply static contact component (4) which are arranged in the shell (1);

the moving contact component (2) comprises a support (21) and a moving contact conducting bar (22) arranged on the support (21), wherein the moving contact conducting bar (22) is connected with a load wiring terminal (5) through a connecting piece (6);

the opposite two sides of the first end of the moving contact conducting bar (22) are respectively provided with a common contact (221) and a standby contact (222), and the moving contact conducting bar (22) can drive the common contact (221) to be in contact conduction with the common power supply static contact component (3) or drive the standby contact (222) to be in contact conduction with the standby power supply static contact component (4) when rotating.

2. Contact arrangement according to claim 1, characterized in that a rocker arm (7) and a connecting rod (8) are also provided in the housing (1);

one end of the connecting rod (8) is connected with the rocker arm (7), the other end of the connecting rod is connected with the support (21), and the rocker arm (7) swings to drive the support (21) to rotate.

3. The contact device as claimed in claim 2, wherein the support (21) is provided with a shaft hole (211) through which a rotating shaft (23) passes to be mounted in the housing (1);

the connecting rod (8) is a U-shaped connecting rod, the extending end of the U-shaped connecting rod is respectively arranged on the rocker arm (7) and the support (21), and the rocker arm (7) swings to drive the support (21) to rotate around the rotating shaft (23).

4. Contact arrangement according to claim 2, characterized in that the first end of the holder (21) is provided with a positioning slot (213); the bottom of the positioning groove (213) is provided with a first positioning hole (2131);

a second positioning hole (223) is formed in the second end of the moving contact conducting bar (22);

the moving contact component (2) further comprises a fastener (24) which is used for penetrating the first positioning hole (2131) and the second positioning hole (223) so as to position and install the moving contact conducting bar (22) on the support (21).

5. The contact device as claimed in claim 2, wherein a limiting groove (214) is provided on a second end of the support (21) which is provided with a first end extending obliquely downward; the notch of the limiting groove (214) penetrates through the upper surface and the lower surface of the support (21);

the moving contact component (2) further comprises a first clamp (25) arranged in the limiting groove (214), and a second clamp (9) is further arranged in the shell (1) and is positioned obliquely below the second end of the support (21);

the first clamp (25) and the second clamp (9) are both in a T-shaped structure and comprise a positioning part and a buckling part connected with the positioning part; the buckling part is provided with a notch;

the first clamp (25) and the notch of the second clamp (9) are mutually crossed and vertically meshed, a pressure spring (10) is sleeved on the periphery of the buckling part of the first clamp and the second clamp, and the pressure spring (10) is limited between the positioning parts of the first clamp and the second clamp.

6. The contact arrangement as claimed in claim 5, characterized in that the limiting groove (214) is provided on both sides with a first through-hole (2141);

a second through hole (2511) matched with the first through hole (2141) is formed in the positioning portion (251) of the first clamp (25);

and the pin shaft (26) penetrates through the first through hole (2141) and the second through hole (2511) so as to rotatably install the first clamp (25) in the limiting groove (214).

7. Contact arrangement according to claim 6, characterised in that a backing plate (11) is arranged in the housing (1) obliquely below the second end of the carrier (21), the positioning part of the second clip (9) abutting against the backing plate (11).

8. The contact arrangement according to claim 1, characterized in that an arc extinguishing chamber (12) is further provided in the housing (1), contacts of the common power supply fixed contact assembly (3) and the standby power supply fixed contact assembly (4) are located in the arc extinguishing chamber (12), and an opening of the arc extinguishing chamber (12) faces the movable contact assembly (2).

9. The contact arrangement according to claim 1, characterized in that an arc-isolating piece (13) is further provided between the common power supply fixed contact assembly (3) and the standby power supply fixed contact assembly (4), the arc-isolating piece (13) comprising a plate-like body facing the movable contact assembly (2).

10. An automatic transfer switching apparatus, characterized in that it comprises a contact device according to any one of claims 1 to 9.