Contact device and automatic transfer switch electrical appliance

Abstract

The present invention relates to a contact device and an automatic switching switch. The contact device includes a housing, a moving contact assembly rotatably arranged in the housing, a common power static contact assembly and a standby power static contact assembly arranged in the housing; the moving contact assembly includes a support, a moving contact conductive row arranged on the support, and the moving contact conductive row is connected to a load terminal through a connector; a common contact and a standby contact are respectively arranged on opposite sides of the first end of the moving contact conductive row, and when the moving contact conductive row rotates, the common contact can be driven to contact and conduct with the common power static contact assembly, or the standby contact can be driven to contact and conduct with the standby power static contact assembly. The contact device has a fast contact switching speed, greatly shortens the switching time, effectively reduces the manufacturing cost and reduces the overall volume of the switch, and meets the power supply occasion requirements of modern power supply systems for fast switching of power supply.

Description

Technical Field

[0001] The present invention relates to the technical field of switch electrical equipment, and in particular to a contact device and an automatic switching switch electrical equipment. Background Art

[0002] Automatic transfer switch is a common low-voltage electrical appliance, often used in important power distribution occasions, for switching between two power sources to ensure that when the normal power supply fails during the power supply process, it can quickly switch to the backup power supply to ensure normal power supply to the load end.

[0003] Existing PC-level automatic transfer switch electrical appliances often use a set of independent snap-on contacts for the common side incoming line terminal and the standby side incoming line terminal, which has high cost, slow switching speed, large size and small opening distance. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a contact device and an automatic transfer switch electrical appliance.

[0005] The technical solution adopted by the present invention to solve the technical problem is: construct a contact device, including a housing, a moving contact assembly rotatably arranged in the housing, a common power static contact assembly and a standby power static contact assembly arranged in the housing;

[0006] The moving contact assembly comprises a support, a moving contact conductive bar arranged on the support, and the moving contact conductive bar is connected to the load terminal through a connecting piece;

[0007] Common contacts and spare contacts are respectively provided on opposite sides of the first end of the movable contact conductive row. When the movable contact conductive row rotates, it can drive the common contacts to contact and conduct with the common power static contact assembly, or drive the spare contacts to contact and conduct with the spare power static contact assembly.

[0008] Preferably, a rocker arm and a connecting rod are also provided in the housing;

[0009] One end of the connecting rod is connected to the rocker arm, and the other end is connected to the support. The swing of the rocker arm drives the support to rotate.

[0010] Preferably, the support is provided with an axis hole for a rotating shaft to pass through so as to be installed in the housing;

[0011] The connecting rod is a U-shaped connecting rod, and the extended ends of the U-shaped connecting rod are respectively installed on the rocker arm and the support. The swing of the rocker arm drives the support to rotate around the rotating shaft.

[0012] Preferably, a positioning groove is provided on the first end of the support; a first positioning hole is provided at the bottom of the positioning groove;

[0013] A second positioning hole is provided on the second end of the movable contact conductive row;

[0014] The moving contact assembly further includes a fastener used to penetrate the first positioning hole and the second positioning hole so as to position and install the moving contact conductive bar on the support.

[0015] Preferably, a limiting groove is provided on the second end of the first end of the support extending obliquely downward; the notch of the limiting groove passes through the upper and lower surfaces of the support;

[0016] The moving contact assembly further includes a first clamp disposed in the limiting groove, and a second clamp is disposed in the housing and located obliquely below the second end of the support;

[0017] The first clamp and the second clamp are both in a "T"-shaped structure, including a positioning portion and a buckle portion connected to the positioning portion; the buckle portion is provided with a notch;

[0018] The notches of the first clamp and the second clamp intersect and vertically engage with each other, and compression springs are sleeved on the outer peripheries of the buckle parts of the two clamps, and the compression springs are limitedly located between the positioning parts of the two clamps.

[0019] Preferably, first through holes are provided on both sides of the limiting groove;

[0020] The positioning portion of the first clamp is provided with a second through hole matching the first through hole;

[0021] and a pin shaft, wherein the pin shaft is penetrated through the first through hole and the second through hole so as to rotatably install the first clamp in the limiting groove.

[0022] Preferably, a pad is further provided in the housing and located obliquely below the second end of the support, and the positioning portion of the second clamp abuts against the pad.

[0023] Preferably, an arc extinguishing chamber is further provided in the housing, and the contacts of the common power static contact assembly and the standby power static contact assembly are located in the arc extinguishing chamber, and the opening of the arc extinguishing chamber faces the moving contact assembly.

[0024] Preferably, an arc isolation piece is further provided between the common power static contact assembly and the standby power static contact assembly, and the arc isolation piece comprises a plate-shaped body, and the plate-shaped body faces the moving contact assembly.

[0025] An automatic transfer switch electrical appliance comprises the above-mentioned contact device.

[0026] The implementation of the present invention has the following beneficial effects: the contact device has a fast contact switching speed, the switching time is greatly shortened, the manufacturing cost is effectively reduced and the overall volume of the switch is reduced, and the power supply occasion requirements of modern power supply systems for fast switching of power supply are met. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0028] Figure 1 It is a schematic structural diagram of the contact device of the present invention;

[0029] Figure 2 It is a schematic diagram of the internal three-dimensional structure of the contact device of the present invention;

[0030] Figure 3 is a structural exploded diagram of the contact device of the present invention;

[0031] Figure 4 It is a structural exploded diagram of the moving contact assembly of the present invention;

[0032] Figure 5 It is a structural schematic diagram of the support of the present invention;

[0033] Figure 6 It is a schematic diagram of the structure of the movable contact assembly, the rocker arm and the compression spring of the present invention;

[0034] Figure 7 It is a structural schematic diagram of a commonly used power static contact assembly of the present invention;

[0035] Figure 8 It is a schematic diagram of the structure of the contact between the movable contact assembly of the present invention and the commonly used static contact assembly of the power supply;

[0036] Fig. 9 It is a schematic diagram of the structure in which the movable contact assembly of the present invention does not contact;

[0037] Fig.10 It is a schematic diagram of the structure of the contact between the moving contact assembly and the standby power supply static contact assembly of the present invention;

[0038] Fig.11 It is a structural schematic diagram of the automatic transfer switch electrical appliance of the present invention. DETAILED DESCRIPTION

[0039] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now 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", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0040] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0041] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

[0042] like Figure 1-10 As shown, a contact device of the present invention includes a shell 1, which is an insulating shell, including a detachable first shell and a second shell, and the opposite sides of the first shell and the second shell may be provided with screw holes, and the two are connected by threads. Alternatively, the first shell is provided with a hole, and the second shell is correspondingly provided with a positioning column, and the positioning column is inserted into the hole for matching installation. Alternatively, the first shell and / or the upper part are provided with a pressure plate, a pressure wheel and other structures, which are fixed and installed by pressing. Alternatively, it can also be fixed and installed by snap-fitting. It can be understood that there are many ways to fix it, which are not specifically limited here. Furthermore, the shell can be made of a high-molecular polymer material that is resistant to high temperatures, stable and has high hardness.

[0043] Furthermore, it also includes a moving contact assembly 2 rotatably arranged in the housing 1, a common power static contact assembly 3, a standby power static contact assembly 4, a load terminal 5, a rocker arm 7 and a connecting rod 8 arranged in the housing 1.

[0044] The common power static contact assembly 3 and the standby power static contact assembly 4 are respectively arranged on the upper and lower opposite sides of the left end of the housing 1. Contacts are arranged on the ends of the opposite sides of the two. The side away from the contacts is fixed in the housing 1 by bolts. The load terminal 5 is located on the upper right side of the housing 1, and one end thereof is fixed to the housing 1 by bolts. Figure 7 As shown, it is a standby power static contact assembly 4, and a contact 41 is formed on the contact part thereof. The structure of the common power static contact assembly 3 and the standby power static contact assembly 4 is substantially the same, and the two are arranged relatively symmetrically.

[0045] Furthermore, the moving contact assembly 2 includes a support 21 and a moving contact conductive bar 22 disposed on the support 21. The moving contact conductive bar 22 is connected to the load terminal 5 via a connector 6. The connector 6 is a soft wire.

[0046] The movable contact conductive bar 22 is generally a long strip flat plate structure, and its first end is located between the contacts of the common power static contact assembly 3 and the standby power static contact assembly 4. Common contacts 221 and standby contacts 222 are respectively provided on opposite sides of the first end, and the common contacts 221 and standby contacts 222 are silver alloys, which are fixed to the ends of the movable contact conductive bar 22 by welding. Furthermore, the movable contact conductive bar 22 is provided with a low step, and the common contacts 221 and standby contacts 222 are provided on the low step.

[0047] When the movable contact conductive row 22 rotates, it can drive the common contact 221 to contact and conduct with the common power static contact assembly 3, or drive the spare contact 222 to contact and conduct with the spare power static contact assembly 4. It can be understood that the movable contact assembly 2, the common power static contact assembly 3, and the spare power static contact assembly 4 form a single-pole double-throw contact design.

[0048] A positioning groove 213 is formed on the first end of the support 21 , a first positioning hole 2131 is formed at the bottom of the positioning groove 213 , and a second positioning hole 223 is formed on the movable contact conductive bar 22 away from the second end.

[0049] The movable contact assembly 2 further includes a fastener 24 for penetrating a first positioning hole 2131 and a second positioning hole 223 to position and install the movable contact conductive bar 22 on the support 21. Further, the first positioning hole 2131 and the second positioning hole 223 may be screw holes, and the fastener 24 may be a screw.

[0050] In this embodiment, the rocker arm 7 is disposed on the upper portion of the support 21 , one end of the connecting rod 8 is connected to the rocker arm 7 , and the other end is connected to the support 21 , and when the rocker arm 7 swings, the support 21 is driven to rotate.

[0051] Furthermore, the rocker arm 7 includes a cylinder, and a square hole is provided in the middle of the cylinder for installing a square shaft, which drives the rocker arm 7 to swing and then drives the moving contact assembly 2 to swing.

[0052] Furthermore, the support 21 is provided with an axial hole 211 for a rotating shaft 23 to pass through so as to be installed in the housing 1. The connecting rod 8 is a U-shaped connecting rod, and the extended ends of the U-shaped connecting rod are respectively installed on the rocker arm 7 and the support 21.

[0053] Further, the rocker arm 7 includes a cylinder body, on which a protrusion structure extending in the direction of the common power static contact assembly 3 and the standby power static contact assembly 4 is provided, the protrusion structure is semi-elliptical, so that the entire rocker arm 7 is a teardrop-shaped structure, a round hole is provided on the protrusion structure, and a round hole 212 is provided on the support 21 below the positioning groove 213, the upper side protruding end of the U-shaped connecting rod is installed in the round hole of the protrusion structure, and the lower side protruding end is rotated into the round hole 212, and the swing of the rocker arm 7 drives the support 21 to rotate around the rotating shaft 23. It can be understood that the driving force for the rotation of the moving contact assembly 2 comes from the clockwise and counterclockwise rotation of the rocker arm 7 to drive the U-shaped connecting rod.

[0054] When the moving contact assembly 2 is just separated, the semi-elliptical protrusion structure characteristic gap on the rocker arm 7 is passed through. When the driving force is transmitted through the rocker arm 2, the semi-elliptical protrusion structure characteristic gap on the rocker arm 7 must be eliminated first, so that the moving contact assembly 2 has a certain initial speed when it starts to move, so as to achieve the purpose of increasing the contact separation speed.

[0055] Furthermore, a limiting groove 214 is provided on the second end extending obliquely downward from the first end of the support 21, and the notch of the limiting groove 214 passes through the upper and lower surfaces of the support 21. The moving contact assembly 2 also includes a first clamp 25 arranged in the limiting groove 214, and a second clamp 9 is also provided in the shell 1 at a location 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, including a positioning portion, and a snap portion connected to the positioning portion; a notch is provided on the side of the snap portion away from the positioning portion, and the notches of the first clamp 25 and the second clamp 9 cross and vertically engage with each other, and a compression spring 10 is provided on the outer periphery of the snap portions of the two, and the compression spring 10 is limited between the positioning portions of the two.

[0056] Combination Figure 3 and Figure 4The first clamp 25 includes a positioning portion 251, and a buckle portion 252 provided in the middle of the positioning portion 251 and extending therefrom, and the two sides of the positioning portion 251 protrude from the two sides of the buckle portion 252 so as to limit the compression spring 10 later. Further, first through holes 2141 are provided on both sides of the limiting groove 214, and the positioning portion 251 of the first clamp 25 is provided with a second through hole 2511 matched with the first through hole 2141, and a pin 26, and the pin 26 is passed 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. The pin 26 can be a cylindrical rivet.

[0057] The second clamp 9 includes a positioning portion 91 and a buckle portion 92 extending from the middle of the positioning portion 91. Both sides of the positioning portion 91 protrude from both sides of the buckle portion 92 to subsequently limit the compression spring 10. The positioning portion 91 may be provided with a through hole or not.

[0058] Furthermore, a pad 11 is provided in the housing 1 at an angle below the second end of the support 21. The pad 11 is generally in an "L"-shaped structure. The positioning portion 91 of the second clamp 9 abuts against the pad 11. Specifically, the side of the positioning portion 91 is parallel to the inner side of the bend of the pad 11. The pad 11 is provided in the insulating housing 1, mainly to reduce friction and prevent wear.

[0059] It can be understood that the first clamp 25 can flexibly rotate along the pin shaft 26 in the limiting groove 214, and is inserted into the second clamp 9 installed on the pad 11 for tangential limiting without restricting its axial movement, so that the compression spring 10 can apply the eccentric torque required to maintain the closed position of the moving contact assembly 2 in the axial direction of the first clamp 25.

[0060] When the compression spring 10 is installed on the first clamp 25, the expansion force of the compression spring 10 is transmitted to the support 21 through the first clamp 25, generating a torque on the support 21, and generating an eccentric force mode around the rotating shaft 23, providing a holding force when the moving contact assembly 2 is in contact with the normal power supply static contact assembly 3 and the standby power supply static contact assembly 4, so that the circuit remains in the on state.

[0061] Furthermore, an arc extinguishing chamber 12 is further provided in the housing 1, and the contacts of the common power static contact assembly 3 and the standby power static contact assembly 4 are located in the arc extinguishing chamber 12, and the opening of the arc extinguishing chamber 12 faces the moving contact assembly 2. The connecting and disconnecting actions of the moving contact assembly 2 and the common power static contact assembly 3 and the standby power static contact assembly 4 are all completed in the arc extinguishing chamber, and the arc is extinguished by the arc extinguishing chamber.

[0062] Furthermore, an arc isolation piece 13 is provided between the common power static contact assembly 3 and the standby power static contact assembly 4 . The arc isolation piece 13 includes a plate-shaped body, and the plate-shaped body faces the moving contact assembly 2 .

[0063] Combination Figure 8 , Fig. 9 , Fig.10 As shown, when the moving contact conductive row 22 on the moving contact assembly 2 contacts the common power static contact assembly 3, the common power is connected to the load, and the compression spring 10 pushes the first clamp 25 to support the support 21 in the moving contact assembly 2 and applies a pressure. The direction of the pressure has a certain angle with the force point of the support 21 and the rotating shaft 23, so that the moving contact assembly 2 generates an eccentric rotation torque around the rotating shaft 23, providing a holding force when the moving contact assembly 2 and the common power static contact assembly 3 are closed.

[0064] When the moving contact conductive row 22 on the moving contact assembly 2 contacts with the standby power supply static contact assembly 4, the standby power supply is connected to the load at this time, and the compression spring 10 pushes the first clamp 25 to support the support 21 in the moving contact assembly 2 and applies a pressure. The direction of the pressure has a certain angle with the force point of the support 21 and the rotating shaft 23, so that the moving contact assembly 2 generates an eccentric rotational torque around the rotating shaft 23, providing a holding force when the moving contact assembly 2 and the standby power supply static contact assembly 4 are closed.

[0065] like Fig.11 As shown, an automatic transfer switch electrical appliance of the present application includes the above-mentioned contact device.

[0066] The contact device and automatic switching switch of the present application overcome the deficiencies of the prior art, significantly shorten the contact switching time of the switching switch, and effectively reduce the cost and the overall size of the switch, thus meeting the needs of modern power supply systems for rapid switching of power supply.

[0067] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, the above technical features can be freely combined without departing from the concept of the present invention, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the coverage of the claims of the present invention.

Claims

1. A contact device, comprising a housing (1), characterized in that: It also includes a moving contact assembly (2) rotatably arranged in the housing (1), a common power static contact assembly (3) and a standby power static contact assembly (4) arranged in the housing (1); The moving contact assembly (2) comprises a support (21) and a moving contact conductive bar (22) arranged on the support (21), wherein the moving contact conductive bar (22) is connected to a load terminal (5) via a connecting piece (6); A common contact (221) and a spare contact (222) are respectively provided on opposite sides of the first end of the movable contact conductive row (22); when the movable contact conductive row (22) rotates, it can drive the common contact (221) to contact and conduct with the common power static contact assembly (3), or drive the spare contact (222) to contact and conduct with the spare power static contact assembly (4); 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 to the rocker arm (7), and the other end is connected to the support (21); the rocker arm (7) swings to drive the support (21) to rotate; The support (21) is provided with an axis hole (211) through which a rotating shaft (23) passes so as to be installed in the housing (1); The connecting rod (8) is a U-shaped connecting rod, and the extended ends of the U-shaped connecting rod are respectively mounted on the rocker arm (7) and the support (21), and the swing of the rocker arm (7) drives the support (21) to rotate around the rotating shaft (23); A limiting groove (214) is provided on the second end of the support (21) which is extended obliquely downward from the first end; the notch of the limiting groove (214) passes through the upper and lower surfaces of the support (21); The moving contact assembly (2) further comprises a first clamp (25) arranged in the limiting groove (214), and a second clamp (9) is also arranged in the housing (1) at a position 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, comprising a positioning portion and a buckle portion connected to the positioning portion; the buckle portion is provided with a notch; The notches of the first clamp (25) and the second clamp (9) intersect and vertically engage with each other, and a compression spring (10) is sleeved on the outer periphery of the buckle parts of the two, and the compression spring (10) is limited between the positioning parts of the two.

2. The contact device according to claim 1, characterized in that: A positioning groove (213) is provided on the first end of the support (21); a first positioning hole (2131) is provided at the bottom of the positioning groove (213); A second positioning hole (223) is provided on the second end of the movable contact conductive row (22); The moving contact assembly (2) further comprises a fastener (24) for penetrating the first positioning hole (2131) and the second positioning hole (223) so as to position and install the moving contact conductive bar (22) on the support (21).

3. The contact device according to claim 1, characterized in that: First through holes (2141) are provided on both sides of the limiting groove (214); The positioning portion (251) of the first clamp (25) is provided with a second through hole (2511) matching with the first through hole (2141); and a pin shaft (26), wherein the pin shaft (26) is inserted into the first through hole (2141) and the second through hole (2511) so as to rotatably mount the first clamp (25) in the limiting groove (214).

4. The contact device according to claim 3, characterized in that: A pad (11) is also provided in the housing (1) at a position obliquely below the second end of the support (21), and the positioning portion of the second clamp (9) abuts against the pad (11).

5. The contact device according to claim 1, characterized in that: An arc extinguishing chamber (12) is also provided in the housing (1), and the contacts of the common power static contact assembly (3) and the standby power static contact assembly (4) are located in the arc extinguishing chamber (12), and the opening of the arc extinguishing chamber (12) faces the moving contact assembly (2).

6. The contact device according to claim 1, characterized in that: An arc isolation piece (13) is further provided between the common power static contact assembly (3) and the standby power static contact assembly (4), wherein the arc isolation piece (13) comprises a plate-shaped body, and the plate-shaped body faces the moving contact assembly (2).

7. An automatic transfer switch, characterized in that: The contact device comprises the contact device according to any one of claims 1 to 6.

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