CN109545594B

CN109545594B - Change-over switch

Info

Publication number: CN109545594B
Application number: CN201910015172.9A
Authority: CN
Inventors: 毛振风; 陈英; 朱冬明
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2019-01-08
Filing date: 2019-01-08
Publication date: 2024-02-27
Anticipated expiration: 2039-01-08
Also published as: CN109545594A

Abstract

The utility model provides a change over switch, this change over switch includes switch group and interlock, and switch group includes first switch and second switch, characteristics: the interlocking device comprises a first interlocking rod and a first lever member; the first switch comprises a first main shaft for driving the contact system inside the first switch to act, and the second switch comprises a second locking rod for locking the closing action of the second switch; when the first switch is switched on, the first main shaft drives the first interlocking rod to move, and the first interlocking rod pushes the first lever piece to rotate and presses the second locking rod, so that the second switch is locked and cannot be switched on; when the first switch is opened, the first main shaft drives the first interlocking rod to reversely move, the first interlocking rod pushes the first lever piece to reversely rotate and unlock the second locking rod, and the second switch can perform closing action. The mechanical interlocking device can be restored without an elastic piece, and has the characteristics of simple structure, long service life, low cost and the like.

Description

Change-over switch

Technical Field

The invention belongs to the technical field of piezoelectric devices, and particularly relates to a change-over switch for switching a dual power supply.

Background

Along with the increasing electricity consumption demand, the capacity of the change-over switch used for switching the dual power supply is also increased, and in order to accelerate the design speed and the design difficulty of the change-over switch, the change-over switch is generally formed by assembling two high-capacity switches up and down, wherein in order to ensure that the two switches forming the change-over switch are not in a closing state at the same time, mechanical interlocking devices are required to be configured between the two switches so as to meet the actual demands.

In the conventional mechanical interlocking device of a transfer switch, as disclosed in chinese patent application publication No. CN108807041a, in order to make the mechanical interlocking device have a recovery function, that is, when one circuit breaker changes from a closed state to an open state, the locking of the other circuit breaker should be released, so that the other circuit breaker can be switched from a state where the closing is impossible to a state where the closing is possible. In the prior art, the elastic piece is adopted to realize the functions, but because the elastic piece is easy to damage, the service life is lower and the cost is high, and the requirements of the change-over switch on parts in the service life period cannot be met.

Disclosure of Invention

The object of the invention is to provide a change-over switch with a simple structure, a long service life and a low cost, which can realize the recovery of a mechanical interlocking device without an elastic piece.

The object of the invention is achieved by a change-over switch comprising a switch group comprising a first switch and a second switch and an interlocking device comprising a first interlocking lever and a first lever; the first switch comprises a first main shaft for driving the contact system inside the first switch to act, and the second switch comprises a second locking rod for locking the closing action of the second switch; when the first switch is switched on, the first main shaft drives the first interlocking rod to move, and the first interlocking rod pushes the first lever piece to rotate and presses the second locking rod, so that the second switch is locked and cannot be switched on; when the first switch is opened, the first main shaft drives the first interlocking rod to reversely move, the first interlocking rod pushes the first lever piece to reversely rotate and unlock the second locking rod, and the second switch can perform closing action.

In a specific embodiment of the present invention, the interlocking device further includes a second interlocking lever and a second lever member; the second switch comprises a second main shaft for driving the contact system inside the second switch to act, and the first switch comprises a first locking rod for locking the closing action of the first switch; when the second switch is switched on, the second main shaft drives the second interlocking rod to move, and the second interlocking rod pushes the second lever to rotate and press the first locking rod, so that the first switch is locked and cannot be switched on; when the second switch is opened, the second main shaft drives the second interlocking rod to reversely move, the second interlocking rod pushes the second lever piece to reversely rotate and unlock the first locking rod, and the first switch can conduct closing action.

In another specific embodiment of the present invention, the transfer switch further includes a pair of side plates, the pair of side plates are mounted on both sides of the switch set, and the interlocking device is mounted on the side plates.

In another specific embodiment of the present invention, a first driving piece is fixed at the end of the first spindle, and the first driving piece drives the first interlocking rod to act.

In still another specific embodiment of the present invention, the end portion of the second locking lever is fixedly provided with a second mating end, and the first lever member triggers the second mating end to act or reset, so as to drive the second locking lever to act.

In a further specific embodiment of the present invention, the end portion of the first locking lever is fixedly provided with a first matching end, and the second lever triggers the first matching end to act or reset, so as to drive the first locking lever to act.

In a further specific embodiment of the present invention, the first interlocking lever includes a first lever body, a first sliding hole provided on the first lever body, and a first driving piece fitting hole; the first protruding shaft on the first driving piece is embedded into the first driving piece matching hole; the mounting piece fixed on the side plate is embedded into the first sliding hole.

In yet another specific embodiment of the present invention, the first interlock lever further includes a first pressing end and a first restoring end; the first lever piece comprises a first pushed end and a first restoring fit end; the first pushed end is in pushing fit with the first pressing end, and the first restoring fit end is in pushing fit with the first restoring end.

In yet another specific embodiment of the present invention, the first lever member further includes a first rotation hole and a first limit hole, wherein the first rotation hole is used for the first lever member to be rotatably disposed on the side plate, and the first limit hole is matched with a limit shaft fixed on the side plate.

In a further specific embodiment of the present invention, the change-over switch further comprises a screw, a washer and a nut which are matched with the mounting piece, wherein the mounting piece is provided with a convex edge, one side of the convex edge is opposite to the side plate, and the other side of the convex edge is opposite to the first interlocking rod; and the screw passes through the mounting piece and then is matched with the gasket and the nut to be tightened.

The change-over switch can realize the recovery of the mechanical interlocking device without an elastic piece, and has the characteristics of simple structure, long service life, low cost and the like.

Drawings

Fig. 1 shows a schematic diagram of an automatic transfer switch according to the present invention.

Fig. 2 shows a schematic view of the interlock device of the present invention mounted on a side plate.

Fig. 3 shows a schematic view of an interlock device according to the present invention.

Fig. 4 shows a schematic view of the first interlock lever in the present invention.

Fig. 5 shows a schematic view of a second interlock lever in accordance with the present invention.

Fig. 6 shows a schematic view of a first lever member in the present invention.

Fig. 7 shows a schematic view of a second lever member in the present invention.

Fig. 8 shows a schematic installation of the first interlock lever and the side plate in the present invention.

Fig. 9 shows a schematic view of the installation of the first lever member with the side plate in the present invention.

In the figure: 1. switch set, 11, first switch, 111, first operating mechanism, 112, first spindle, 1121, first drive tab, 11211, first protruding shaft, 113, first locking lever, 1131, first mating end, 12, second switch, 121, second operating mechanism, 122, second spindle, 1221, second drive tab, 12211, second protruding shaft, 123, second locking lever, 1231, second mating end. 2. A side plate; 3. the interlock device, 31, first interlock lever, 311, first rod body, 312, first sliding aperture, 313, first drive tab mating aperture, 314, first compression end, 315, first return end, 32, second interlock lever, 321, second rod body, 322, second sliding aperture, 323, second drive tab mating aperture, 324, second compression end, 325, second return end, 33, first lever, 331, first rotational aperture, 332, first limit aperture, 333, first pushed end, 334, first return mating end, 34, second lever, 341, second rotational aperture, 342, second limit aperture, 343, second pushed end, 344, second return mating end. 4. Mounting piece, 41. Protruding edge; 5. screw, 51, washer, 52, nut.

Detailed Description

The following detailed description of the embodiments of the invention, taken in conjunction with the accompanying drawings, is given by way of illustration and not limitation, and any variations, not in the spirit, of the inventive concepts are to be regarded as being within the scope of the invention.

Fig. 1 is a schematic diagram of an automatic transfer switch according to the present invention. The automatic transfer switch comprises a switch group 1, a pair of side plates 2 and an interlocking device 3. The pair of side plates 2 are mounted on both sides of the switch group 1, and the switch group 1 includes a first switch 11 and a second switch 12. The locking device 3 is mounted on the side plate 2, although the locking device 3 can be positioned by other means, for example on a special fixing plate. The interlocking device 3 realizes the interlocking between the first switch 11 and the second switch 12. The first switch 11 comprises a first operating mechanism 111, and the first operating mechanism 111 is used for driving the first switch 11 to be closed or opened; the second switch 12 includes a second operating mechanism 121, and the second operating mechanism 121 is configured to drive the second switch 12 to be opened or closed.

As shown in fig. 2 to 3, the interlocking device 3 includes a first interlocking rod 31, a second interlocking rod 32, a first lever member 33, and a second lever member 34; the first switch 11 further includes a first main shaft 112 and a first locking lever 113, where the first main shaft 112 is used to drive a contact system inside the first switch 11 to implement on-off, and the first locking lever 113 is used to lock the first operating mechanism 111 so as not to perform on-off operation; similarly, the second switch 12 further includes a second main shaft 122 and a second locking rod 123, where the second main shaft 122 is used to drive the contact system inside the second switch 12 to be opened or closed, and the second locking rod 123 is used to lock the second operating mechanism 121 to be unable to perform the closing action.

The directions described below are all shown in the drawings. When the first switch 11 is closed, the first main shaft 112 drives the first interlock lever 31 to move, the first interlock lever 31 pushes the first lever member 33 to rotate and presses the second lock lever 123, so that the second switch 12 is locked and cannot be closed; when the first switch 11 is opened, the first main shaft 112 drives the first interlock lever 31 to move reversely, the first interlock lever 31 pushes the first lever 33 to rotate reversely and unlock the second lock lever 123, and the second switch 12 can perform a closing operation. More specifically, the end of the first main shaft 112 is fixed with a first driving plate 1121, and the first main shaft 112 rotates to drive the first interlocking rod 31 to move through the first driving plate 1121. A second mating end 1231 is fixedly disposed at an end of the second locking rod 123, and the first lever member 33 contacts the second mating end 1231, so that the first lever member 33 drives the second locking rod 123 to rotate through the second mating end 1231.

When the second switch 12 is closed, the second spindle 122 drives the second locking lever 32 to move, and the second locking lever 32 pushes the second lever 34 to rotate and press the first locking lever 113, so that the first switch 11 is locked and cannot be closed; when the second switch 12 is opened, the second spindle 122 drives the second locking lever 32 to move reversely, the second locking lever 32 pushes the second lever 34 to rotate reversely and unlock the first locking lever 113, and the first switch 11 can perform a closing action. More specifically, a second driving piece 1221 is fixed to an end of the second spindle 122, and the second spindle 122 is rotated to drive the second interlock lever 32 to move by the second driving piece 1221. A first mating end 1131 is fixedly disposed at an end of the first locking lever 113, and the second lever member 34 contacts the first mating end 1131, so that the second lever member 34 drives the first locking lever 113 to rotate through the first mating end 1131.

Referring to fig. 4, a schematic view of the first interlock lever 31 is shown, wherein the first interlock lever 31 includes a first lever body 311, a first sliding hole 312 disposed on the first lever body 311, a first driving plate engaging hole 313, a first pressing end 314, and a first restoring end 315. The first sliding hole 312 and the first driving piece fitting hole 313 are elongated holes. The first rod 311 is shaped to meet the distance requirement between the first spindle 112 and the first lever 33, and specifically, the first rod 311 is shaped to meet the distance requirement between the first protruding shaft 11211 on the first driving piece 1121 and the first lever 33. The first protruding shaft 11211 is inserted into the first driving piece fitting hole 313. The first interlock lever 31 is slidably disposed on the side plate 2, and specifically, the mounting member 4 fixed on the side plate 2 is inserted into the first sliding hole 312 and slides in the first sliding hole 312, so as to realize the sliding mounting relationship between the first interlock lever 31 and the side plate 2. The first pressing end 314 and the first restoring end 315 are configured to cooperate with the first lever member 33, specifically, when the first switch 11 performs a closing operation, the first interlock lever 31 is driven by the first driving piece 1121 on the first main shaft 112 to move, and the first pressing end 314 pushes the first lever member 33 to rotate, and the first lever member 33 pushes the second lock lever 123 to rotate. When the first switch 11 performs the opening operation, the first locking lever 31 is driven by the first driving piece 1121 on the first main shaft 112 to move reversely, the first restoring end 315 pushes the first lever 33 to rotate reversely, and the second locking lever 123 returns due to its restoring force.

Referring to fig. 5, a schematic view of the second interlock lever 32 is shown, wherein the second interlock lever 32 includes a second lever body 321, a second sliding hole 322 provided on the second lever body 321, a second driving plate engaging hole 323, a second pressing end 324, and a second restoring end 325. The second sliding hole 322 and the second driving plate matching hole 323 are elongated holes. The second rod 321 is shaped to meet the distance requirement between the second spindle 122 and the second lever 34, and specifically, the second rod 321 is shaped to meet the distance requirement between the second protruding shaft 12211 on the second driving piece 1221 and the second lever 34. The second protrusion shaft 12211 is inserted into the second driving sheet fitting hole 323. The second interlock lever 32 is slidably disposed on the side plate 2, and specifically, the mounting member 4 fixed on the side plate 2 is inserted into the second sliding hole 322 and slides in the second sliding hole 322, so as to achieve a sliding mounting relationship between the second interlock lever 32 and the side plate 2. The second pressing end 324 and the second restoring end 325 are used for cooperating with the second lever member 34, specifically, when the second switch 12 performs a closing action, the second locking lever 32 is driven by the second driving piece 1221 on the second spindle 122 to move, and the second pressing end 324 pushes the second lever member 34 to rotate, and the second lever member 34 pushes the first locking lever 113 to rotate. When the second switch 12 performs the opening operation, the second locking lever 32 is driven by the second driving piece 1221 on the second main shaft 122 to move reversely, the second restoring end 325 pushes the second lever 34 to rotate reversely, and the first locking lever 113 returns due to its restoring force. Since the second interlock lever 32 has a long length, the second interlock lever 32 may be formed in a spliced form in order to ensure the simplicity and stability of the processing of the second interlock lever 32. For example, the second interlock lever 32 may comprise two segments, which are joined to form the second interlock lever 32 when completed.

Referring to fig. 6, the first lever member 33 is a sheet-shaped member, typically made of a metal plate, and the first lever member 33 includes a first rotation hole 331, a first limiting hole 332, a first pushed end 333, and a first return fitting end 334, wherein the first rotation hole 331 is a circular hole for the first lever member 33 to be rotatably disposed on the side plate 2, and the first limiting hole 332 is a kidney-shaped hole for being fitted with a limiting shaft fixed on the side plate 2, so that the rotation angle of the first lever member 33 is constrained. The first pushed end 333 is configured to cooperate with the first pressing end 314, i.e. the first pushed end 333 is contacted by the first pressing end 314 and pressed. The first restoring engagement end 334 is configured to engage with the first restoring end 315, and when the first interlocking lever 31 moves reversely, the first restoring end 315 pushes the first restoring engagement end 334, so as to drive the first lever 33 to rotate reversely.

As shown in fig. 7, the second lever member 34 is a sheet-shaped member, typically made of a metal plate, the second lever member 33 includes a second rotation hole 341, a second limit hole 342, a second pushed end 343, and a second return fitting end 344, the second rotation hole 341 is a circular hole for the second lever member 34 to be rotatably disposed on the side plate 2, and the second limit hole 342 is a kidney-shaped hole for being engaged with a limit shaft fixed on the side plate 2, so that the rotation angle of the second lever member 34 is restricted. The second pushed end 343 is configured to cooperate with the second pressing end 324, that is, the second pushed end 343 is contacted by the second pressing end 324 and pushed. The second return engaging end 344 is configured to engage with the second return end 325, and when the second interlock lever 32 moves in a reverse direction, the second return end 325 pushes the second return engaging end 344, thereby driving the second lever 34 to rotate in a reverse direction.

Fig. 8 is a schematic view of the mounting structure between the first interlock lever 31 and the side plate 2, since the first interlock lever 31 is required to be in sliding mounting relation with the side plate 2. Specifically, the mounting member 4 is inserted into the corresponding mounting hole of the side plate 2, the mounting member 4 is a hollow part, the mounting member 4 is provided with a protruding edge 41, the protruding edge 41 is located in the middle of the mounting member 4, two sides of the protruding edge 41 are opposite to the side plate 2 and the first interlocking rod 31 respectively, the mounting member 4 passes through the first sliding hole 312 on the first interlocking rod 31, and is matched with the gasket 51 and the nut 52 for tightening after passing through the mounting member 4 through the screw 5. The above-mentioned mounting member 4 ensures that the first interlock lever 31 has a certain mounting clearance, facilitating the sliding of the first interlock lever 31 with respect to the side plate 2. The sliding mounting structure between the second interlock lever 32 and the side plate 2 is the same as this structure, and a description thereof will not be repeated.

Fig. 9 is a schematic view of the mounting structure between the first lever member 33 and the side plate 2, since the first lever member 33 is required to be in a rotational mounting relationship with the side plate 2. Specifically, the mounting member 4 is plugged into the corresponding mounting hole of the side plate 2, the mounting member 4 is a hollow part, the mounting member 4 is provided with a protruding edge 41, the protruding edge 41 is located in the middle of the mounting member 4, two sides of the protruding edge 41 are opposite to the side plate 2 and the first lever member 33 respectively, the mounting member 4 passes through the first rotating hole 331 in the first lever member 33, and is matched with the washer 51 and the nut 52 for tightening after passing through the mounting member 4 through the screw 5. Thereby achieving a rotational mounting between the first lever member 33 and the side plate 2. The above-mentioned mounting member 4 ensures that the first lever member 33 has a certain mounting clearance, facilitating the rotation of the first lever member 33 relative to the side plate 2. The rotation mounting structure between the second lever member 34 and the side plate 2 is the same as the present structure, and a description thereof will not be repeated.

The interlocking device 3 is not necessarily installed on the side plate 2, and can be installed on other added components with positioning functions.

In the present invention, the first interlocking rod 31 drives the first lever member 33 to reciprocate, so that the first lever member 33 does not need to have a self-restoring force; similarly, the second lever member 34 is driven to reciprocate by the second interlock lever 32, so that the second lever member 34 itself does not need to have a self-restoring force. The first lever member 33 and the second lever member 34 can realize their reverse rotation without elastic members, and do not press the locking lever any more, thereby realizing unlocking action.

Claims

1. A change-over switch comprising a switch group (1) and an interlocking device (3), said switch group (1) comprising a first switch (11) and a second switch (12), characterized in that: the interlocking device (3) comprises a first interlocking rod (31) and a first lever member (33); the first switch (11) comprises a first main shaft (112) for driving the contact system inside the first switch (11) to act, and the second switch (12) comprises a second locking rod (123) for locking the closing action of the second switch (12); when the first switch (11) is switched on, the first main shaft (112) drives the first interlocking rod (31) to move, and the first interlocking rod (31) pushes the first lever member (33) to rotate and press the second locking rod (123), so that the second switch (12) is locked and cannot be switched on; when the first switch (11) is switched off, the first main shaft (112) drives the first interlocking rod (31) to move reversely, the first interlocking rod (31) pushes the first lever member (33) to rotate reversely and unlock the second locking rod (123), and the second switch (12) can perform switching-on action; the first interlocking rod (31) further comprises a first pressing end (314) and a first restoring end (315); the first lever member (33) includes a first pushed end (333) and a first return mating end (334); wherein the first pushed end (333) is in push fit with the first pressing end (314), and the first return fitting end (334) is in push fit with the first return end (315).

2. A transfer switch according to claim 1, characterized in that said interlocking means (3) further comprises a second interlocking lever (32) and a second lever member (34); the second switch (12) comprises a second main shaft (122) for driving the contact system inside the second switch (12) to act, and the first switch (11) comprises a first locking rod (113) for locking the closing action of the first switch (11); when the second switch (12) is switched on, the second main shaft (122) drives the second linkage rod (32) to move, and the second linkage rod (32) pushes the second lever member (34) to rotate and press the first locking rod (113), so that the first switch (11) is locked and cannot be switched on; when the second switch (12) is switched off, the second main shaft (122) drives the second linkage rod (32) to move reversely, the second linkage rod (32) pushes the second lever member (34) to rotate reversely and unlock the first locking rod (113), and the first switch (11) can conduct switching-on actions.

3. A transfer switch according to claim 1 or 2, characterized in that the transfer switch further comprises a pair of side plates (2), the pair of side plates (2) being mounted on both sides of the switch block (1), the interlocking means (3) being mounted on the side plates (2).

4. A transfer switch according to claim 1, wherein a first driving piece (1121) is fixed at an end of the first main shaft (112), and the first driving piece (1121) drives the first interlock lever (31) to operate.

5. A change-over switch according to claim 1, characterized in that the end of the second locking rod (123) is fixedly provided with a second mating end (1231), and the first lever member (33) triggers the second mating end (1231) to move or reset, thereby driving the second locking rod (123) to move.

6. A change-over switch according to claim 2, characterized in that the end of the first locking lever (113) is fixedly provided with a first mating end (1131), and the second lever member (34) triggers the first mating end (1131) to move or reset, thereby driving the first locking lever (113) to move.

7. A transfer switch according to claim 1, characterized in that said first interlock lever (31) comprises a first lever body (311), a first slide hole (312) provided in the first lever body (311) and a first driving plate mating hole (313); the first protruding shaft (11211) on the first driving plate (1121) is embedded into the first driving plate matching hole (313); the mounting piece (4) fixed on the side plate (2) is embedded into the first sliding hole (312).

8. A transfer switch according to claim 3, wherein the first lever member (33) further comprises a first rotation hole (331) and a first limit hole (332), the first rotation hole (331) is used for the first lever member (33) to be rotatably arranged on the side plate (2), and the first limit hole (332) is matched with a limit shaft fixed on the side plate (2).

9. A change-over switch according to claim 7, characterized in that it further comprises a screw (5), a washer (51) and a nut (52) cooperating with the mounting member (4), said mounting member (4) being provided with a flange (41), one side of the flange (41) being opposite to said side plate (2) and the other side of the flange (41) being opposite to the first interlocking lever (31); and the screw (5) passes through the mounting piece (4) and then is matched with the gasket (51) and the nut (52) to be tightened.