CN219696279U

CN219696279U - Operating mechanism of dual-power automatic transfer switch

Info

Publication number: CN219696279U
Application number: CN202321341616.6U
Authority: CN
Inventors: 朱诚; 顾怡文; 徐晓阳
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2023-05-30
Filing date: 2023-05-30
Publication date: 2023-09-15
Anticipated expiration: 2033-05-30

Abstract

An operating mechanism of a dual-power automatic transfer switch belongs to the technical field of piezoelectric devices. The automatic switching device comprises a driving unit and a rotary table assembly, wherein the driving unit drives the rotary table assembly to rotate among three positions corresponding to a first power switch-on position, a double-split position and a second power switch-on position of the double-power automatic switching switch, so that the rotary table assembly drives an execution switch of the double-power automatic switching switch to realize the switching of the double-power switching switch at the three positions, and the automatic switching device is characterized in that: the operating mechanism further comprises a buffer device, and the cam profile on the turntable assembly is abutted against the buffer device in the process of switching from the first power switching-on position to the double-split position or from the second power switching-on position to the double-split position by the double-power automatic transfer switch, so that the buffer device absorbs the rotation energy of the turntable assembly. The advantages are that: the reliability of the action of the operating mechanism is improved, and the buffer device is used as a damping device to absorb redundant energy, so that the quick conversion and accurate conversion of the dual-power automatic change-over switch are ensured.

Description

Operating mechanism of dual-power automatic transfer switch

Technical Field

The utility model belongs to the technical field of piezoelectric devices, and particularly relates to an operating mechanism of a dual-power automatic transfer switch.

Background

The double-power transfer switch is used in a power supply system, when one power supply fails, the failed power supply can be prevented from supplying power to a load, and the other power supply can be reliably selected to be put into operation, so that the continuity of power supply is ensured. The switch is generally used in places of importance such as hospitals, airports, docks, banks, etc.

Under the automatic mode, the traditional automatic change-over switch adopts a motor as a power source, the rotation of the motor is transmitted to a turntable assembly through a speed reducing device, the turntable assembly drives toggle levers which are respectively arranged on two sides of the turntable assembly, and a handle of an executing switch (such as a circuit breaker) is driven to conduct switching-on and switching-off actions, so that the double-power change-over switch is switched between a common power supply switching-on and a standby power supply switching-on. The motor driving mode is to drive the switch to act through the motor travel, the switching time is in the range of 1 s-2 s, even higher than 2s, so that compared with the 0.1s switching speed of the PC-level ATSE of the excitation driving, the switching speed of the ATSE of the motor driving mode is slower.

In order to solve the above problems, designers have improved the power source and introduced the excitation drive to increase the switching speed, but have brought about new problems, particularly in the three-position change-over switch which is required to have a double-split position, when the double-power change-over switch is switched from the closing position to the double-split position, the operating mechanism cannot be reliably stopped at the double-split position due to the large residual energy of the electromagnetic drive, and the switching failure is caused.

In view of the above-described prior art, there is a need for a reasonable improvement in the structure of the operating mechanism of the existing dual-power automatic transfer switch. To this end, the inventors have advantageously devised that the technical solutions described below are created in this context.

Disclosure of Invention

The utility model aims to provide an operating mechanism of a dual-power automatic transfer switch, which is provided with a damping device at a dual-position, and the damping device absorbs the residual energy of rotation of a turntable assembly of the operating mechanism, so that the operating mechanism is ensured to be reliably stopped at the dual-position, and the reliability of actions is improved.

The utility model accomplishes the task like this, an operating mechanism of the automatic change-over of a kind of dual power, including driving unit, rotary table assembly, the driving unit drives the rotary table assembly to rotate between the first power of the corresponding automatic change-over of dual power is closed, the two divides and the second power is closed three positions, thus drive the execution switch action of the automatic change-over of dual power by the rotary table assembly, realize the switch over of the change-over of dual power in above-mentioned three positions, the characteristic is: the operating mechanism further comprises a buffer device, and the cam profile on the turntable assembly is abutted against the buffer device in the process of switching from the first power switching-on position to the double-split position or from the second power switching-on position to the double-split position by the double-power automatic transfer switch, so that the buffer device absorbs the rotation energy of the turntable assembly.

In a particular embodiment of the utility model, the cam profile on the turntable assembly abuts the buffer means such that the turntable assembly stops when the turntable assembly rotates near the middle of its rotational travel.

In another specific embodiment of the utility model, the operating mechanism further comprises a bracket, the turntable assembly comprises a driving disk rotatably arranged on the bracket, the cam profile is formed on the circumferential profile surface of the driving disk, and the buffer device is fixed on the bracket.

In yet another specific embodiment of the present utility model, the buffering device includes a positioning shaft, an elastic member sleeved on the positioning shaft, and a sleeve sleeved on the elastic member.

In yet another specific embodiment of the present utility model, the positioning shaft and the sleeve are formed of a metallic material, and the elastic member is a rubber ferrule.

In a further specific embodiment of the present utility model, the bracket includes a pair of plate-shaped bracket plates arranged in parallel, and two ends of the positioning shaft are respectively fixed on the two bracket plates correspondingly.

In a further specific embodiment of the present utility model, the driving discs are arranged in parallel, the elastic members have two groups, corresponding to one driving disc respectively, the sleeves have two groups, corresponding to one elastic member respectively, and the two groups of elastic members are divided by a circular table in the middle of the positioning shaft.

In a further specific embodiment of the present utility model, the positioning shaft extends from the middle round table to two sides of the axial direction to form an elastic member sleeving shaft, the elastic member sleeving shafts at two sides continue to extend to two sides of the axial direction to form fixed ends fixed on the support, the elastic member is sleeved on the elastic member sleeving shaft, the sleeve is sleeved on the outer side of the elastic member, and when the turntable assembly rotates to a position corresponding to the double-power automatic transfer switch, the cam profile on the turntable assembly abuts against the sleeve.

The utility model has the beneficial effects that due to the adoption of the structure, the utility model has the following advantages: the operating mechanism of the dual-power automatic transfer switch is additionally provided with a buffer device, the cam profile on the turntable assembly is abutted against the buffer device in the process of transferring the dual-power automatic transfer switch from the first power switching-on position to the dual-division position or from the second power switching-on position to the dual-division position, the buffer device absorbs the rotating energy of the turntable assembly, the reliability of the operation of the operating mechanism is improved, and the buffer device is used as a damping device to absorb redundant energy, so that the dual-power automatic transfer switch is ensured to be quickly transferred and accurately transferred.

Drawings

FIG. 1 is a perspective view of a dual power transfer switch according to the present utility model;

FIG. 2 is an exploded view of the dual power transfer switch of the present utility model;

FIG. 3 is an exploded view of the operating mechanism of the present utility model;

FIG. 4 is an exploded view of the turntable assembly of the present utility model;

FIG. 5 is an exploded view of the cushioning device of the present utility model;

FIG. 6 is a diagram of a rotary disc assembly when the switch of the present utility model is switched from a closed position to a double-split position;

FIG. 7 is a diagram showing the cooperation of the turntable and the buffer device when the turntable assembly approaches the middle position of the turntable travel when the switch is in the double-split position;

FIG. 8 is a diagram showing the cooperation of the turntable and the buffer device when the turntable stops near the middle position of the turntable travel.

In the figure: 1. the driving unit is used for driving the electromagnet, the movable iron core, the first connecting rod, the first bending driving end, the second connecting rod, the second bending driving end, the connecting rod and the return spring, wherein the first connecting rod is arranged at the first end of the driving unit, the second connecting rod is arranged at the second end of the driving unit, the first connecting rod is arranged at the second end of the driving unit, the second connecting rod is arranged at the first end of the driving unit, the second connecting rod is arranged at the second end of the driving unit, the electromagnet is arranged at the second end of the driving unit, the movable iron core is arranged at the third end of the driving unit, the first connecting rod is arranged at the; 2. the transmission comprises a rotary disc assembly, 20, a driving disc, 201, a sliding groove, 202, a fixed shaft hole, 203, a dodge rod rotating shaft hole, 204, a driving shaft hole, 205, a rotating center hole, 21, a cam profile, 22, a fixed shaft, 23, a first driving shaft, 24, a second driving shaft, 25, a rotating center shaft, 251, a first shaft table, 252, a first rotating boss, 253, a second rotating boss, 26, a first dodge member, 261, a first dodge rod shaft, 262, a first dodge rod rotating shaft, 27, a second dodge member, 271, a second dodge rod shaft, 272, a second dodge rod rotating shaft, 28, a spring and 29. 3. The device comprises a buffer device, a positioning shaft, an elastic piece, a shaft, a fixed end, an elastic piece, a sleeve, a round table, a support and a limiting shaft, wherein the buffer device, the positioning shaft, the elastic piece, the shaft, the fixed end, the elastic piece, the sleeve, the round table, the support and the limiting shaft are sleeved with the buffer device, the positioning shaft, the elastic piece, the fixed end, the elastic piece, the sleeve, the round table, the support and the limiting shaft, and the elastic piece; 5. a bottom plate; 6. a first execution switch; 7. a second execution switch; 8. a selection unit 81, a selection electromagnet 82, and a selection connecting rod; 91. a handle seat, 92. A handle; 60. the lever is toggled.

Detailed Description

The following detailed description of specific embodiments of the utility model, taken in conjunction with the accompanying drawings, is not intended to limit the scope of the utility model, but rather should be construed to cover any and all modifications that may fall within the spirit and scope of the utility model.

In the following description, any reference to the directions or azimuths of up, down, left, right, front and rear is based on the positions shown in the corresponding drawings, and therefore, should not be construed as a limitation on the technical solutions provided by the present utility model.

Referring to fig. 1, the present utility model relates to an operating mechanism of a dual-power automatic transfer switch, which includes a bottom plate 5, a first executing switch 6, a second executing switch 7 and an operating mechanism, wherein in this embodiment, the first executing switch 6 is a molded case circuit breaker, the second executing switch 7 is also a molded case circuit breaker, the operating mechanism is fixed in the middle of the bottom plate 5, and the first executing switch 6 and the second executing switch 7 are separately arranged at two sides of the operating mechanism.

The dual-power automatic transfer switch shown in fig. 1 to 3 has a first power switching-on position, i.e. a first executing switch 6 is switched on and a second executing switch 7 is switched off, a dual-switching-on position, i.e. the first executing switch 6 is switched off and the second executing switch 7 is switched off, and a second power switching-on position, i.e. the first executing switch 6 is switched off and the second executing switch 7 is switched on. The dual-power automatic transfer switch can be automatically switched through the driving unit 1 and the selecting unit 8 in the operating mechanism, and can also be manually switched by using the handle 92 fixed in the handle seat 91 at the side surface of the bottom plate 5 to select the manual mode and then drive the turntable assembly 2 to rotate through the handle operating hole formed in the upper cover.

The operating mechanism comprises a bracket 4 fixed on a bottom plate 5, a driving unit 1 and a selecting unit 8 fixed on the bracket 4, a rotary table assembly 2 rotatably arranged on the bracket 4, toggle levers 60 rotatably arranged on the bracket 4 and arranged on two sides of the rotary table assembly 2, a control module fixed on the bottom plate 5 and positioned on the front side of the bracket 4, a housing fixed on the bottom frame 5 and positioned on the rear side of the bracket 4, and an upper cover covered above the bracket 4, the control module and the housing. The bracket 4, the turntable assembly 2, the driving unit 1 and the selection unit 8 are covered inside the housing by the upper cover, the control module housing and the cover shell to form a module.

As shown in fig. 3 and 6, the driving unit 1 is a power source and comprises a driving electromagnet 10, a connecting rod 13, a first connecting rod 11, a second connecting rod 12 and a return spring 14, wherein the connecting rod 13 is fixedly connected with a movable iron core 101 of the driving electromagnet 10, the end parts of the first connecting rod 11 and the second connecting rod 12 are respectively and rotatably connected with the connecting rod 13, the two connecting rods are symmetrically arranged by the driving electromagnet 10, and a first bending driving end 111 and a second bending driving end 121 are respectively formed by bending the free ends of the first connecting rod 11 and the second connecting rod 12 and are matched with the turntable assembly 2. The return spring 14 has one end connected to the bracket 4 and the other end connected to the second link 12, and is effective in that when the selection unit 8 is in the initial position, the return spring 14 pulls the second link 12 and links the first link 11 through the selection link 82, so that the first link 11 is in transmission relation with the turntable assembly 2, and the transmission relation between the second link 12 and the turntable assembly 2 is disconnected. In addition, when the selecting unit 8 is completely powered off, the return spring 14 pulls the second link 12 and links the first link 11 through the selecting link 82, so that the first link 11 and the second link 12 return to the initial positions, that is, the positions keep the first link 11 in transmission relation with the turntable assembly 2, and the transmission relation between the second link 12 and the turntable assembly 2 is disconnected.

As shown in fig. 3 and 4, the turntable assembly 2 includes a pair of driving discs 20, a fixed shaft 22, a first driving shaft 23, and a second driving shaft 24, which are disposed in parallel and have the same structure, and a pair of symmetrically disposed sliding grooves 201, a fixed shaft hole 202, a pair of avoidance shaft rotating shaft holes 203, a pair of driving shaft holes 204, and an oblong rotating center hole 205 are formed in each of the driving discs 20. The two ends of the fixed shaft 22 are respectively and correspondingly fastened in the fixed shaft holes 202 of the pair of driving discs 20. The two ends of the first driving shaft 23 are respectively and correspondingly fastened in a corresponding one of the driving shaft holes 204 on the pair of driving disks 20. The two ends of the second driving shaft 24 are respectively and correspondingly fastened in the other driving shaft holes 204 corresponding to each other on the pair of driving disks 20. The two drive disks 20 are fixed by a fixed shaft 22, a first drive shaft 23 and a second drive shaft 24.

As shown in fig. 3 and 4, the turntable assembly 2 further includes a rotation center shaft 25, a pair of first pillow blocks 251 on the rotation center shaft 25 are fastened to the oblong rotation center holes 205 on the pair of driving disks 20, and a first rotation boss 252 of the rotation center shaft 25 is engaged with the bracket 4, so that the turntable assembly 2 is rotatably disposed on the bracket 4. The second rotating boss 253 at the top of the rotating center shaft 25 is fixed to the center of a transmission turntable 29 to be described later, so that the driving disk 20 and the transmission turntable 29 are synchronously rotated. The dial assembly 2 further includes a drive dial 29 that cooperates with a pair of toggle levers 60. The turntable assembly 2 further includes a first bypass member 26 and a second bypass member 27 which are identical in construction and are symmetrically disposed on opposite sides of the center of rotation of the turntable assembly 2, each including a pair of bypass bars disposed on opposite sides of the drive disk 20. The pair of walls of the first bypass member 26 permit the fastening of the rods therebetween by a first bypass lever shaft 261 received in the slide groove 201 and a first bypass lever rotational shaft 262 disposed in the bypass lever rotational shaft hole 203. The pair of walls of the second bypass member 27 allow the rods to be secured therebetween by a second bypass shaft 271 received in the other slide groove 201 and a second bypass shaft rotational shaft 272 disposed in the other bypass shaft rotational shaft hole 203. The two bypass shafts of the first bypass member 26 and the second bypass member 27 on the upper side of the actuator disk 20 are connected by a spring 28, and the two bypass shafts of the first bypass member 26 and the second bypass member 27 on the lower side of the actuator disk 20 are connected by another spring 28.

As shown in fig. 3, 6 to 8, the selection unit 8 includes a selection electromagnet 81 and a selection link 82. The selection electromagnet 81 is fixed on the bracket 4. The middle part of the selection connecting rod 82 is in driving fit with the selection electromagnet 81, and two ends of the selection connecting rod are respectively and rotatably connected with the free ends of the first connecting rod 11 and the second connecting rod 12. When the selection unit 8 is at the initial position, the first connecting rod 11 and the turntable assembly 2 are in transmission relation, the second connecting rod 12 and the turntable assembly 2 are disconnected, the selection electromagnet 81 is powered, the movable iron core is attracted, the movable iron core of the selection electromagnet 81 is actuated to actuate the selection connecting rod 82, so that the first connecting rod 11 and the turntable assembly 2 are disconnected, and the second connecting rod 12 and the turntable assembly 2 are in transmission relation.

As shown in fig. 3, the bracket 4 includes a pair of plate-shaped bracket plates arranged in parallel, the driving unit 1 and the driving disk 20 are disposed between the pair of bracket plates, the transmission turntable 29 and the toggle lever 60 are disposed on the upper side of the bracket 4, and the selection unit 8 is disposed on the lower side of the bracket 4.

As shown in fig. 2 and 3, under the combined action of the driving unit 1 and the selecting unit 8, the rotating disc assembly 2 rotates forward and backward to drive the toggle levers 60 matched with the rotating disc assembly 2 to swing, and as the toggle levers 60 on two sides are respectively matched with the handles of the first executing switch 6 and the second executing switch 7 corresponding to each other, the molded case circuit breaker is driven to perform the switching-on and switching-off actions, therefore, the rotating disc assembly 2 also has three corresponding positions corresponding to the first power switch-on, the double switching-off and the second power switch-on of the double power switch-off.

As shown in fig. 3, 4 and 5, the utility model is characterized in that: the circumferential contour of the drive disk 20 is formed with a cam contour 21, so that the drive disk 20 is in the form of a cam. The operating mechanism further comprises a buffer device 3, wherein the buffer device 3 comprises a positioning shaft 31, an elastic piece 32 sleeved on the positioning shaft 31 and a sleeve 33 sleeved on the elastic piece 32. The two ends of the positioning shaft 31 are respectively fixed on the two brackets 4, and since the driving disc 20 has two pieces, the elastic member 32 has two groups corresponding to two driving discs 20. The two sleeves 33 are respectively corresponding to one elastic piece 32, the two groups of elastic pieces 32 are divided by a round table 34 in the middle of the positioning shaft 31, the positioning shaft 31 and the sleeves 33 are made of metal materials, and the elastic pieces 32 are rubber ferrules. Specifically, the positioning shaft 31 extends from the middle round table 34 to two sides of the axial direction to form an elastic member sleeved shaft 311, the elastic member sleeved shafts 311 at two sides continue to extend to two sides of the axial direction to form fixed ends 312 fixed on the support 4, the elastic member 32 is sleeved on the elastic member sleeved shaft 311, and the sleeve 33 is sleeved on the outer side of the elastic member 32. In the process of switching the double-power automatic transfer switch from the first power switching-on position to the double-division position or from the second power switching-on position to the double-division position, the cam profile 21 on the turntable assembly 2 abuts against the buffer device 3, and the buffer device 3 absorbs the rotation energy of the turntable assembly 2.

The cooperation of the buffer means 3 and the cam profile 21 will be described below in connection with the switching process of a dual power automatic transfer switch.

As shown in fig. 6, the dual-power transfer switch is in a state of a first power switch-on position, referring to fig. 2, when the first executing switch 6 is switched on and the second executing switch 7 is switched off, the turntable assembly 2 is located at a first position corresponding to the first power switch-on, and is separated from the buffer device 3, that is, the circumferential contour surface of the driving disc 20 is not contacted with the buffer device 3. When the driving electromagnet 10 of the driving unit 1 is powered on, the movable iron core 101 of the driving unit 1 acts under the action of electromagnetic attraction force, the movable iron core 101 synchronously pulls the first connecting rod 11 and the second connecting rod 12 to act, and at this time, the selecting unit 8 is at the initial position, the first connecting rod 11 and the turntable assembly 2 have a transmission relation, and the second connecting rod 12 is disconnected from the transmission relation of the turntable assembly 2, so that during the action of the movable iron core 101 of the driving unit 1, the first bending driving end on the first connecting rod 11 is matched with the first driving shaft 23, the turntable assembly 2 is enabled to rotate clockwise by pulling the first driving shaft 23, the transmission turntable 29 of the turntable assembly 2 rotates clockwise, and the left poking lever 60 matched with the transmission turntable 29 in fig. 2 is driven to rotate anticlockwise, so that the handle of the first executing switch 6 at the left side is driven to move towards the rebuckling direction.

As shown in fig. 7, the first actuating switch 6 of the dual power transfer switch completes the rebuckling operation, at this time, the movable iron core 101 of the driving unit 1 is limited by the pair of limiting shafts 41 fixed on the bracket 4, the cam profile 21 on the driving disc 20 is about to contact with the sleeve 33 of the buffer device 3, and the driving disc 20 continues to rotate clockwise due to inertia.

As shown in fig. 8, the dual power switch is in the double-split position, when the driving disk 20 rotates to a position near the middle of the whole rotation stroke, the cam profile 21 abuts against the buffer device 3, the cam profile 21 contacts with the sleeve 33, the elastic member 32 deforms to absorb the residual energy of the rotation of the driving disk 20, and finally the driving disk 20 is stopped near the middle position (approximately the middle position of the whole rotation stroke of the driving disk 20), and the whole operating mechanism is synchronously stopped at the double-split position.

Therefore, the defect that the operating mechanism cannot be reliably stopped at the double-split position due to large residual energy of electromagnetic driving when the electromagnet is used as a power source is overcome.

In the position of fig. 8, after the driving electromagnet 10 of the driving unit 1 is powered off, the driving electromagnet 10 of the driving unit 1 is released, and drives the first link 11 to move downwards from the position of fig. 8, in the moving process, the first bending driving end 111 of the first link 11 acts on the first avoidance lever shaft 261, so that the first avoidance lever shaft 261 slides in the sliding groove 201, the first avoidance member 26 retreats from the moving path of the first link 11, so that the first link 11 smoothly moves below the first avoidance lever shaft 261, and when the first bending driving end 111 of the first link 11 passes over the first avoidance lever shaft 261, the first avoidance lever shaft 261 returns to a position located in the moving path of the first bending driving end 111 of the first link 11 under the action of the spring 28. When the automatic transfer switch is required to be switched from the first power supply to the second power supply, the driving electromagnet 10 of the driving unit 1 is powered on again, the first bending driving end 111 of the first connecting rod 11 pulls the first avoiding rod shaft 261, so that the driving disc 20 rotates clockwise for the second time, the synchronous clockwise rotation of the transmission turntable 29 drives the right toggle lever 60 to rotate anticlockwise in fig. 3, so that the second executing switch 7 is driven to be switched on, and the left toggle lever 60 keeps motionless due to no matched transmission with the driving shaft on the transmission turntable 29, namely the first executing switch 6 keeps switching off. Thereby, the switching process from the first power supply closing to the second power supply closing is completed.

Further, when the switching from the second power switch-on to the first power switch-on is required, the selection electromagnet 81 of the selection unit 8 is electrically attracted, and the moving iron core of the selection electromagnet 81 acts to drive the selection link 82 to move leftwards at the position of fig. 3, so as to push the first link 11 to disconnect from the turntable 20, and thus the second link 12 and the turntable 20 establish a transmission relationship. When the driving unit 1 is powered on and the movable iron core 101 of the driving unit 1 is in attraction movement, the second connecting rod 12 drives the rotary table 20 to act, the rotary table 20 is driven to rotate anticlockwise by the position shown in fig. 3, the second executing switch 7 is driven to switch off, the double-power automatic transfer switch is reached, when the driving disc 20 rotates to a middle position close to the whole rotation stroke of the driving disc 20, the rotary table 20 is matched with the buffer device 3, the cam profile 21 is abutted against the buffer device 3, namely, the cam profile 21 is contacted with the sleeve 33, the elastic piece 32 is enabled to deform to absorb residual energy of rotation of the driving disc 20, finally, the driving disc 20 is enabled to rest near the middle position (approximately the middle position of the whole rotation stroke of the driving disc 20), and the whole operating mechanism is enabled to synchronously rest at the double-split position. The process of continuing to move from the double-split position to the first power supply closing position is similar to the process of moving from the double-split position to the second power supply closing position, and is not repeated here.

Claims

1. The utility model provides an operating device of dual supply automatic transfer switch, includes drive unit (1), carousel subassembly (2), and drive unit (1) drive carousel subassembly (2) are corresponding dual supply automatic transfer switch's first power closing, two divide and the three position that the second power closed to rotate between, thereby drive dual supply automatic transfer switch's execution switch action by carousel subassembly (2), realize the switching of dual supply automatic transfer switch in above-mentioned three positions, its characterized in that: the operating mechanism further comprises a buffer device (3), and in the process of switching the double-power automatic transfer switch from the first power switching-on position to the double-division position or from the second power switching-on position to the double-division position, a cam profile (21) on the turntable assembly (2) is abutted against the buffer device (3), and the buffer device (3) absorbs the rotation energy of the turntable assembly (2).

2. The operating mechanism for a dual power automatic transfer switch of claim 1, wherein: when the turntable assembly (2) rotates to a position close to the middle of the rotating stroke, a cam profile (21) on the turntable assembly (2) abuts against the buffer device (3) so that the turntable assembly (2) stops.

3. The operating mechanism for a dual power automatic transfer switch of claim 2, wherein: the operating mechanism further comprises a support (4), the rotary table assembly (2) comprises a driving disc (20) rotatably arranged on the support (4), the cam profile (21) is formed on the circumferential profile surface of the driving disc (20), and the buffer device (3) is fixed on the support (4).

4. A dual power automatic transfer switch operating mechanism as claimed in claim 3 wherein: the buffer device (3) comprises a positioning shaft (31), an elastic piece (32) sleeved on the positioning shaft (31) and a sleeve (33) sleeved on the elastic piece (32).

5. The operating mechanism for a dual power automatic transfer switch of claim 4, wherein: the positioning shaft (31) and the sleeve (33) are made of metal materials, and the elastic piece (32) is a rubber ferrule.

6. The operating mechanism for a dual power automatic transfer switch of claim 4, wherein: the bracket (4) comprises a pair of plate-shaped bracket plates which are arranged in parallel, and two ends of the positioning shaft (31) are respectively fixed on the two bracket plates correspondingly.

7. The operating mechanism for a dual power automatic transfer switch of claim 4, wherein: the driving discs (20) are arranged in parallel, the elastic pieces (32) are provided with two groups, one driving disc (20) corresponds to each other, the sleeves (33) are also provided with two groups, one elastic piece (32) corresponds to each other, and the two groups of elastic pieces (32) are divided by a round table (34) in the middle of the positioning shaft (31).

8. The operating mechanism for a dual power automatic transfer switch of claim 7, wherein: the positioning shaft (31) extends out of the elastic piece sleeve shaft (311) from the middle round table (34) to two axial sides, the elastic piece sleeve shaft (311) at two sides continues to extend out of the fixed end (312) fixed on the support (4) to two axial sides, the elastic piece (32) is sleeved on the elastic piece sleeve shaft (311), the sleeve (33) is sleeved on the outer side of the elastic piece (32), and when the rotary table assembly (2) rotates to a position corresponding to the double-power automatic transfer switch, the cam profile (21) on the rotary table assembly (2) abuts against the sleeve (33).

9. The operating mechanism for a dual power automatic transfer switch of claim 2, wherein: the driving unit (1) comprises a driving electromagnet (10), and the driving electromagnet (10) drives the turntable assembly (2) to rotate.