CN109545596B

CN109545596B - Operating mechanism of three-position dual-power change-over switch

Info

Publication number: CN109545596B
Application number: CN201910023295.7A
Authority: CN
Inventors: 顾怡文; 沈惠新; 丁晓辉
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2019-01-10
Filing date: 2019-01-10
Publication date: 2024-02-27
Anticipated expiration: 2039-01-10
Also published as: CN109545596A

Abstract

The operating mechanism can drive the contact mechanism to switch among a first power switching-on position, a double switching-off position and a second power switching-on position; the characteristics are as follows: the operating mechanism comprises an energy storage device, an output shaft connected with the contact mechanism and a locking device; the energy storage device comprises a first spring mechanism, a second spring mechanism and a connecting rod for connecting the first spring mechanism and the second spring mechanism; the operating mechanism is provided with a first spring mechanism closing position corresponding to the first power supply closing position, a first spring mechanism closing ready position corresponding to the double-opening position, a second spring mechanism closing ready position corresponding to the second power supply closing position, and a second spring mechanism closing position corresponding to the second power supply closing position. Simple structure, small volume, low cost, convenient operation and high reliability.

Description

Operating mechanism of three-position dual-power change-over switch

Technical Field

The invention belongs to the technical field of piezoelectric devices, and particularly relates to an operating mechanism of a three-position dual-power change-over switch.

Background

The dual-power transfer switch is mainly used in important places such as hospitals, power plants, banks, chemical industry, metallurgy, hotels, high-rise buildings, military facilities and the like, and has the function of ensuring the continuity of power supply. The technical level, the advancement and the reliability of the double-power transfer switch directly influence the level and the reliability of electric equipment in the occasions, and the level and the reliability of the electric equipment are related to the safety and the life of electric personnel. The existing double-power transfer switch can be divided into a two-position double-power transfer switch and a three-position double-power transfer switch, the two-position double-power transfer switch can realize reliable switching between a common power supply and a standby power supply, long-term power failure of electric equipment cannot occur, the power supply reliability is high, the transfer action time is quick, and therefore safety of the electric equipment and continuity of production are guaranteed. The three-position double-power-supply change-over switch can realize reliable switching among three positions of common power supply switching-on, standby power supply switching-on and intermediate switching-off, wherein the intermediate switching-off function is that a contact mechanism of the switch is in a double-split state, and the power-off time of electric equipment is relatively long. The common power source is often referred to as a "first power source" and the backup power source is often referred to as a "second power source". The operating mechanism of the switch is an important mechanism in the whole structure system of the double-power transfer switch, and the function of the operating mechanism is as follows: the switch is used for switching on and off the switch, when a circuit fails, the switch is switched off through manual or electric operation, and when the circuit fails, the switch is switched on through manual or electric operation, so that the safety of a power system and the working continuity of electric equipment are ensured. The three-position double-power-supply change-over switch further comprises a contact mechanism, wherein the contact mechanism is driven by the operating mechanism to act among a first power-supply moving contact closing position, a double-separation position and a second power-supply moving contact closing position, so that the switch can realize switching among a first power-supply closing position, a double-separation position and a second power-supply closing position. The existing three-position double-power-supply change-over switch operating mechanism is complex in structure, complex in operation and unreliable in switching between two power supplies, and the defects influence the electrical continuity of the electrical equipment, so that the electrical equipment is damaged and the danger of an electricity consumption person is caused.

Disclosure of Invention

The technical problem to be solved by the invention is to provide an operating mechanism of the three-position dual-power transfer switch, which can realize one side switching-off and the other side switching-on energy storage operation, and complete the switching-on operation through an electromagnet of a locking device, and has the advantages of simple structure, low cost, convenient operation and high reliability; meanwhile, the locking device is arranged between the two spring mechanisms, so that the whole operating mechanism is compact in structure and small in size.

The invention aims to achieve the task, namely an operating mechanism of a three-position double-power-supply change-over switch, which comprises a contact mechanism and an operating mechanism, wherein the contact mechanism is provided with a first contact closing position for enabling a first power supply to be switched on, a double-opening position for enabling the first power supply and a second power supply to be uniformly switched on, and a third contact closing position for enabling the second power supply to be switched on, and the operating mechanism can drive the contact mechanism to switch between the first power supply switching-on position, the double-opening position and the second power supply switching-on position; the operating mechanism comprises an energy storage device, an output shaft connected with the contact mechanism and a locking device; the energy storage device comprises a first spring mechanism, a second spring mechanism and a connecting rod for connecting the first spring mechanism and the second spring mechanism; the operating mechanism is provided with a first spring mechanism closing position corresponding to the first power supply closing position, a first spring mechanism closing ready position corresponding to the double-split position, a second spring mechanism closing ready position corresponding to the second power supply closing position, and a second spring mechanism closing position corresponding to the second power supply closing position; when the operating mechanism is positioned at the switch-on ready position of the first spring mechanism, the locking device limits the first spring mechanism, the first spring mechanism is in a switch-on energy storage state, at the moment, the limit of the locking device to the first spring mechanism is released, the first spring mechanism releases energy, and the operating mechanism moves to the switch-on position of the first spring mechanism; when the operating mechanism is located at the switch-on ready position of the second spring mechanism, the locking device limits the second spring mechanism, the second spring mechanism is in a switch-on energy storage state, at the moment, the limiting of the locking device to the second spring mechanism is released, the second spring mechanism releases energy, and the operating mechanism moves to the switch-on position of the second spring mechanism.

In a specific embodiment of the present invention, the energy storage device further includes a first driving electromagnet and a second driving electromagnet, the first driving electromagnet electrically drives the first spring mechanism to store energy and then reaches the first spring mechanism switch-on ready position, and the second driving electromagnet electrically drives the second spring mechanism to store energy and then reaches the second spring mechanism switch-on ready position.

In another specific embodiment of the present invention, the operating mechanism includes a frame, the output shaft is rotatably disposed on the frame and is formed by a pair of output arms symmetrically disposed about a rotation center of the output shaft, the first spring mechanism and the second spring mechanism are two sets of mechanisms having the same structure and symmetrically disposed about the rotation center of the output shaft, each of the two sets of mechanisms includes an upper link, a lower link, a brake closing lever and an energy storage spring, the brake closing lever is pivotally disposed on the frame and is connected to a movable iron core of a driving electromagnet corresponding to the upper link, one end of the upper link is pivotally disposed on the frame, the other end of the upper link is hinged to a lower link, one end of the energy storage spring is connected to the brake closing lever, the other end of the energy storage spring is connected to a hinge shaft that hinges the upper link to the lower link, the lower link is connected to the corresponding output arm, and the links connect the brake closing lever of the first spring mechanism and the brake closing lever of the second spring mechanism.

In another specific embodiment of the present invention, the locking device includes a fixing frame, a first locking member and a second locking member, where the fixing frame is mounted on the frame, and the first locking member and the second locking member are two sets of members with identical structures symmetrically arranged at a rotation center of the output shaft, and each of the two sets of members includes a lock catch and a lock catch pivoted on the fixing frame, a lock catch return spring that makes the lock catch keep a pushing trend on the lock catch, and a lock catch return spring that makes the lock catch keep a limiting trend on the upper link.

In still another specific embodiment of the present invention, the operating mechanism includes a pair of upper link upper limit bosses, a pair of upper link lower limit shafts and a pair of opening lever limit bosses, which are fixedly arranged on the frame to be symmetrical with a rotation center of the output shaft; when the operating mechanism is positioned at the switch-on ready position of the first spring mechanism, the switch-on and switch-off lever limiting boss corresponding to the first spring mechanism limits the switch-on and switch-off lever of the first spring mechanism, and the upper connecting rod limiting boss corresponding to the second spring mechanism limits the upper connecting rod of the second spring mechanism; when the second spring mechanism is at a closing ready position, the closing and opening lever limiting boss corresponding to the second spring mechanism limits the closing and opening lever of the second spring mechanism, and the upper connecting rod limiting boss corresponding to the upper connecting rod of the first spring mechanism limits the upper connecting rod of the first spring mechanism; when the operating mechanism is positioned at the closing position of the first spring mechanism, the closing and opening lever limiting boss corresponding to the first spring mechanism limits the closing and opening lever of the first spring mechanism, the upper connecting rod lower limiting shaft corresponding to the first spring mechanism limits the upper connecting rod of the first spring mechanism, and the upper connecting rod upper limiting boss corresponding to the upper connecting rod corresponding to the second spring mechanism limits the upper connecting rod of the second spring mechanism; when the operating mechanism is positioned at the closing position of the second spring mechanism, the closing and opening lever limiting boss corresponding to the second spring mechanism limits the closing and opening lever of the second spring mechanism, the upper connecting rod lower limiting shaft corresponding to the second spring mechanism limits the upper connecting rod of the second spring mechanism, and the upper connecting rod upper limiting boss corresponding to the first spring mechanism limits the upper connecting rod of the first spring mechanism.

In yet another specific embodiment of the present invention, the frame includes a pair of side plates, the first spring mechanism, the second spring mechanism and the output shaft are disposed between the pair of side plates, the fixing frame includes a pair of fixing frame side plates, the first locking member and the second locking member are disposed between the pair of fixing frame side plates, and the pair of fixing frame side plates are respectively fixed to middle positions of upper ends of the respective corresponding side plates.

In a further specific embodiment of the present invention, the buckle includes a trip lever and a buckle lever extending to both sides with a rotation center thereof, and the buckle return spring acts on the trip lever; the lock catch comprises a limit rod and a lock catch rod which extend to two sides from the rotation center of the lock catch, the lock catch return spring acts on the limit rod, the limit rod is matched with the lock catch rod, and the lock catch rod is matched with the upper connecting rod.

In a further specific embodiment of the present invention, the locking device further includes a trigger electromagnet, and the trigger electromagnet drives the locking rod to rotate after being electrically operated, so that the locking rod is driven to release the limit of the upper connecting rod.

In still another specific embodiment of the present invention, the latch rod is provided with a latch surface, the upper link is provided with an upper link limit locking surface and an upper link sliding limit surface adjacent to the upper link limit locking surface, when the switch is located at the double-split position, the latch surface on the first latch piece or the second latch piece realizes the limit of the upper link through the cooperation with the upper link limit locking surface of the corresponding upper link; when the switch is positioned at the first power supply closing position, the limiting end face of the locking rod of the first locking piece slides to the upper connecting rod sliding limiting surface of the upper connecting rod of the first spring mechanism; when the switch is positioned at the second power switch-on position, the limiting end face of the locking rod of the second locking piece slides to the upper connecting rod sliding limiting surface of the upper connecting rod of the second spring mechanism.

In still another specific embodiment of the present invention, the connecting rod includes a first connecting rod and a second connecting rod separately arranged at two sides of the opening and closing lever, and the operating mechanism further includes a manual operating device including a manual operating shaft hole formed at a middle part of one of the connecting rods and a manual operating shaft having one end pivoted to the frame and the other end passing through the manual operating shaft hole.

Due to the adoption of the structure, compared with the prior art, the invention has the beneficial effects that: the switching-on energy storage device can realize switching-off on one side and switching-on energy storage on the other side, and the switching-on operation is completed through the electromagnet of the locking device, so that the switching-on energy storage device is simple in structure, low in cost, convenient to operate and high in reliability; meanwhile, the locking device is arranged between the two spring mechanisms, so that the whole operating mechanism is compact in structure and small in size, and the development requirement of miniaturization of the piezoelectric device is met.

Drawings

Fig. 1 is an exploded view of a switch housing and operating mechanism according to the present invention.

Fig. 2 is a perspective side view of an operating mechanism according to the present invention.

Fig. 3 is a perspective view of an operating mechanism according to the present invention in another side view.

Fig. 4 is an installation view of the locker of the operating mechanism according to the invention.

Fig. 5 is an exploded view of the operating mechanism according to the present invention.

Fig. 6a is an exploded view of a driving electromagnet according to the present invention.

Fig. 6b is a view of a driving electromagnet fixing bracket according to the present invention.

Fig. 6c is a diagram of an electromagnet linkage for connecting a driving electromagnet and a switch lever according to the present invention.

Fig. 6d is a lever diagram of the opening and closing of the present invention.

Fig. 6e is a diagram of an upper link according to the present invention.

Fig. 6f is a lower link diagram according to the present invention.

Fig. 6g is a diagram of an output shaft according to the present invention.

Fig. 6h is a diagram of a manual lever according to the present invention.

Fig. 6i is a first link diagram of the links for connecting two on-off levers according to the present invention.

Fig. 7a is an exploded view of the locker of the present invention.

Fig. 7b is an exploded view of an electromagnet of the latch according to the present invention.

Fig. 7c is a diagram of a fixing frame of the locking device according to the present invention.

Fig. 7d is a snap-on view of the locking device according to the present invention.

Fig. 7e is a latch diagram of the latch device according to the present invention.

Fig. 7f is a diagram of another embodiment of a latch according to the present invention.

Fig. 7g is an assembly view of another embodiment of a latch of the latch device according to the present invention.

Fig. 8a is a schematic diagram of a first spring mechanism in a switch-on ready position (double-split position) in a three-position switch according to the present invention. Fig. 8b is a schematic diagram of a closing position (a first power-on position) of the first spring mechanism in the three-position switch according to the present invention.

Fig. 8c is a schematic diagram of the switching-off over dead point of the first spring mechanism in the switching-on process of the first spring mechanism (the first power-on position) to the switching-on ready position of the second spring mechanism (the double-off position) in the three-position switch according to the present invention.

Fig. 8d is a schematic diagram of a second spring mechanism in a switch-on ready position (double-split position) in the three-position switch according to the present invention.

Fig. 8e is a schematic diagram of a closing position (a second power-on position) of the second spring mechanism in the three-position switch according to the present invention.

Fig. 9a is a schematic diagram of a closing position (a second power-on position) of the second spring mechanism in the two-position switch according to the present invention.

Fig. 9b is a schematic diagram of a closing position (a first power-on position) of the first spring mechanism in the two-position switch according to the present invention.

Fig. 10a is a schematic diagram illustrating the action of the lower link limiting shaft and the lower link in the closing position (first power on position) of the first spring mechanism according to the present invention.

Fig. 10b is a schematic diagram illustrating the action of the lower link limiting shaft and the lower link in the closing position (the second power-on position) of the second spring mechanism according to the present invention.

In the figure: 1. a housing; 2. an operating mechanism; 3. a signal switch;

21. the device comprises a frame, a side plate, a central hole of an output shaft, a top connecting rod pin shaft, a bottom connecting rod pin shaft, a top connecting rod upper limit boss, a top driving electromagnet installation boss, a 21151 bracket installation notch, a 21152, a magnetic yoke positioning notch, a 2116, a limit chute, a 2117, a bottom connecting rod limit boss, a 2118, a positioning shaft, a 2119, a lock catch positioning boss surface, a 212, a support shaft, a 2120, a bottom connecting rod limit shaft, a 2121, a bottom connecting rod limit shaft, a 2122.

22. First spring mechanism, 22' second spring mechanism, 221, upper link, 2211, upper link side plate, 22111, upper link slot, 22112, upper link hinge hole, 22113, slide stop face, 22114, upper link stop lock face, 22115, upper stop strike face, 22116, lower stop strike face, 2212, upper link cross plate, 22121, upper link opening, 2213, baffle, 222, lower link, 2221, lower link side plate, 22211, lower link hinge hole, 22212, output shaft hinge hole, 2222, lower link cross plate, 22221, lower link opening, 223, trip lever, 2231, lever side plate, 22311, lever slot, 22312, link pin, 22313, electromagnet link pin, 2232, lever cross plate, 22321, elongated slot, 22322, elongated opening, 2233, top plate opening, 22331, 224, energy storage spring, 225, pin shaft 226, energy storage spring fixed shaft.

23. Output shaft, 231, revolving body, 232, output arm, 2321, chute, 233, square shaft, 234, mounting pillow block;

24. the connecting rods 241, the first connecting rods 2411, the first transverse plates 24111, the closing and opening lever pin holes 2412, the second transverse plates 24121, the manual operation holes 24122, the driving plates 241221, the first driving bosses 242, the second connecting rods 2421, the closing and opening lever pin holes 2422 and the second driving bosses;

25. First drive electromagnet, 25' second drive electromagnet, 251, moving core, 2511, limit boss, 2512, pin bore, 252, stationary core, 2521, step, 253, coil, 254, yoke, 2541, yoke shroud, 25411, yoke shroud pilot bore, 25412, locating boss, 2542, yoke cover plate, 255, return spring, 256, coil, 257, moving core stationary bracket, 2571, bracket pilot bore, 25711, flange, 2572, lower link limit boss, 2573, mounting boss, 2574, stationary boss, 258, electromagnet link, 2581, elongated slot, 2582, hinge bore, 259, elongated pin shaft.

27 A manual lever 271, a hinge hole 272;

28. the fastener means, 281, mount, 2811, mount side plate, 28111, wiring duct, 28112, fixing boss, 281121, fixing hole, 28113, lug, 281131, fastener mounting pin hole, 28114, fastener mounting pin hole, 28115, mounting locating surface, 2812, mount cross plate, 28121, mount through hole, 282, first fastener, 282' second fastener, 2821, fastener, 28211, lock hole, 282110, pin boss, 28212, trip lever, 28213, fastener lever, 282130, electric trip lever, 282131, notch, 28214, boss, 282141, center, 282142, lock limiting surface, 28215, return spring mounting groove, 2822, fastener, 28221, stop lever, lock lever, and lock lever. 282211, catch stop face, 2822111, stop end face, 282212, opening, 28222, catch lever, 282221, catch face, 282222, stop end face, 28223, mount hinge hole, 2823, catch return spring, 2824, catch return spring, 284, trigger electromagnet, 2841, dead core, 28411, stepped hole, 2842, plunger, 28421, stepped hole, 2843, coil, 28431, coil bobbin, 284311, annular boss, 2844, yoke, 28441, yoke cover, 28442, yoke cover, 284421, coil boss mounting hole, 2845, return spring, 2846, push rod, 28461, disk drive boss, 28462, long screw, 285, pin, 286, pin, 2861, neck.

Detailed Description

The following detailed description is, by way of example, with reference to the accompanying drawings, but the description of the embodiments is not intended to limit the scope of the invention, and any equivalents of the embodiments in accordance with the inventive concepts described herein are to be regarded as merely formal rather than as essential equivalents.

In the following description, all concepts related to the directions or azimuths of the up, down, left, right, front and rear are based on the positions shown in fig. 1, and thus should not be construed as being particularly limited to the technical solutions provided by the present invention.

As shown in fig. 1, the present invention relates to an operating mechanism of a three-position double power transfer switch, which includes a housing 1, an operating mechanism 2, a signal switch 3, and a contact mechanism not shown in the drawing. The three-position dual power transfer switch has three positions: the first power supply switching-on position, the double-split position and the second power supply switching-on position. The contact mechanism can rotate among a first contact position, a second contact position and a third contact position, and when the contact mechanism is positioned at the first contact position, the change-over switch is in a first power switch-on state and a second power switch-off state (namely, the first power switch-on state); when the contact mechanism is positioned at the second contact position, the transfer switch is in a first power switching-off state and a second power switching-off state (double-switching-off positions); when the contact mechanism is located at the third position, the change-over switch is in a second power switch-on state and the first power switch-off state (namely, the second power switch-on state). The operating mechanism can drive the contact mechanism to switch among a first power switch-on position, a double-split position and a second power switch-on position. The three-position double-power-supply change-over switch can be divided into a manual mode, an electric mode and an isolation mode, and when in the manual mode, a handle is inserted for manual operation; in the electric mode, the switch controller controls the switch to act; in the isolated mode, the three-position dual power transfer switch is in the dual position and the switch is not allowed to be operated manually or electrically for maintenance and overhaul. The signal switch 3 is used for feeding back the state of the change-over switch, the state of the operating mechanism 2 and the manual and electric mode selection conditions.

As shown in fig. 3 to 5, the operating mechanism 2 of the three-position dual-power transfer switch according to the present invention includes a frame 21, an energy storage device, an output shaft 23, a manual lever 27, and a locking device 28, where the energy storage device includes a first spring mechanism 22, a first driving electromagnet 25, a second spring mechanism 22', a second driving electromagnet 25', and a connecting rod 24 connecting the first spring mechanism 22 and the second spring mechanism 22 '. The first spring mechanism 22 and the second spring mechanism 22' have the same structure and are positioned at the left side and the right side of the output shaft 23, the frame 21 is a pair of side plates 211, and the pair of side plates 211 are arranged at the front side and the rear side of the output shaft 23 and are respectively connected with the output shaft 23; the output shaft 23 is connected with the contact mechanism; the first driving electromagnet 25 is connected with the first spring mechanism 22, and the second driving electromagnet 25 'is connected with the second spring mechanism 22'; the locking device 28 is positioned in the middle of the first spring mechanism 22 and the second spring mechanism 22 'and plays a role of a trigger device, a manual operation rod 27 is arranged on the connecting rod 24 and the frame 21, a manual operation hole 272 is formed in the middle of the manual operation rod 27, in a manual mode, a user inserts a handle into the manual operation hole 272 from the outside, and the connecting rod 24 is manually driven to act so as to drive the first spring mechanism 22 and the second spring mechanism 22' at two sides to act and store energy, and the switch-on ready position is reached; under the electric mode, the controller of the change-over switch controls the driving electromagnet to be electrified, and the driving electromagnet drives the spring mechanism on the corresponding side to store energy, so that the switch-on ready position is reached. When the switch-on ready position is reached, at this time, a user can control the trigger electromagnet in the locking device 28 to act by the controller in an automatic mode, and the driving spring mechanism releases energy to drive the contact mechanism at the corresponding side to complete the switch-on of the power supply; the manual mode can also be selected, a closing button corresponding to the ready spring mechanism is pressed, the spring mechanism is driven to release energy, and the contact mechanism at the corresponding side is driven to complete power supply closing. Of course, the three-position dual-power transfer switch of the invention can also be provided without the first driving electromagnet 25 and the second driving electromagnet 25', and at this time, the energy storage actions of the first spring mechanism and the second spring mechanism are completed manually by an operator through a handle.

As shown in fig. 5, the frame 21 includes two side plates 211 having the same structure and being installed face to face, and an output shaft center hole 2111 for installing the output shaft 23 is provided at the middle of the two side plates 211.

As shown in fig. 5 and 6g, the output shaft 23 preferably has a V-shaped structure, the output shaft 23 includes a revolving body 231 and two output arms 232 symmetrically disposed about a rotation center thereof, the revolving body 231 is located at a vertex of the V-shape, two V-shaped output arms 232 extend symmetrically in a radial direction of the revolving body 231, two V-shaped output arms 232 are provided with elongated slots 2321, and an intersection point of center lines of the two elongated slots 2321 preferably passes through the center of the revolving body 231. Square shafts 233 are arranged at two axial ends of the output shaft 23, one square shaft 233 at one end is used for being connected with the signal switch 3, the square shaft 233 at the other end is used for being connected with a contact mechanism, and a mounting shaft table 234 is arranged between the square shaft 233 and the revolving body 231. The two ends of the output shaft 23 are hinged in the central hole 2111 of the output shaft of the side plate 211 through the mounting pillow blocks 234.

As shown in fig. 5, the first spring mechanism 22 and the second spring mechanism 22' have the same structure and are symmetrically disposed at two sides of the output shaft 23, and each of the first spring mechanism and the second spring mechanism includes an upper link 221, a lower link 222, a closing and opening lever 223, and an energy storage spring 224.

As shown in fig. 5 and 6e, the upper link 221 is composed of two identical upper link side plates 2211 and an upper link cross plate 2212 which are installed face to face, the two upper link side plates 2211 are symmetrically arranged relative to the upper link cross plate 2212, an upper link notch 22111 is arranged at one end of the two upper link side plates 2211, an upper link hinge hole 22112 is arranged at the other end, a sliding limiting surface 22113 extends outwards along the circumferential direction at one end of the upper link hinge hole 22112, and an upper link limiting locking surface 22114 is arranged at the lower part of the sliding limiting surface 22113. The upper link 221 is further provided with an upper limit impact surface 22115 and a lower limit impact surface 22116, which are matched with the limit parts on the two side plates 211 of the frame 21, and are used for limiting the upper limit and the lower limit of the rotation of the upper link 221. The outer sides of the two upper link side plates 2211 of the upper link 221 are further overlapped with a baffle 2213 with the same shape and structure as the two upper link side plates 2211. The baffle 2213 is fixed on the upper link side plate 2211 by riveting or welding, for increasing the limit reliability of the upper link limit locking surface 22114 and the locking device 28. An upper connecting rod opening 22121 is arranged on the upper connecting rod cross plate 2212, and is used for avoiding the energy storage spring 224 during closing.

As shown in fig. 5 and 6f, the lower link 222 is composed of two lower link side plates 2221 and one lower link cross plate 2222 which are identical in structure and face-to-face, the two lower link side plates 2221 are symmetrically opposite to the lower link cross plate 2222, and a lower link hinge hole 22211 and an output shaft hinge hole 22212 are respectively provided at both ends of the two lower link side plates 2221. The lower link cross plate 2222 is provided with a lower link opening 22221 for avoiding the output shaft 23 during the closing process.

As shown in fig. 5, 6e and 6f, upper link pins 2112 for pivotally connecting the two upper links 221 are symmetrically provided inside the pair of side plates 211 of the frame 21, and the two upper link pins 2112 are located at both sides of the output shaft center hole 2111. The upper link slot 22111 is pivotally connected to the upper link pin 2112, and the upper link hinge hole 22112 and the lower link hinge hole 22211 are respectively provided with a link pin 225 for realizing the hinge of the upper and lower links 221 and 222, and the output shaft hinge hole 22212 of the lower link 222 and the elongated waist-shaped chute 2321 of the output shaft 23 are respectively provided with an output shaft pin 226, so as to realize the connection between the lower link 222 and the output shaft 23.

As shown in fig. 5 and 6d, the opening and closing lever 223 is composed of two lever side plates 2231, a lever transverse plate 2232 and a top plate 2233, which are identical in structure and are installed face to face, and the top plate 2233 is formed by extending and bending the lever transverse plate 2232 and is connected with the two lever side plates 2231 by riveting or welding. The lever side plates 2231 are provided with lever slots 22311, the lever side plates 2231 are provided with a link pin 22312 connected with the link 24 at an end far from the lever slots 22311 and close to the top plate 2233, and an electromagnet link pin 22313 connected with the electromagnet at an end far from the lever slots 22311 and the top plate 2233. The lever transverse plate 2232 is provided with a strip-shaped groove 22321 and a strip-shaped opening 22322 penetrating the strip-shaped groove 22321, an energy storage spring fixing shaft 227 is arranged in the strip-shaped groove 22321, and the top plate 2233 is provided with a top plate opening 22331.

As shown in fig. 5 and 6d, on the outer side surfaces of the two side plates 211, on both sides of the output shaft center hole 2111, there are symmetrically provided on-off lever mounting pins 2113 for pivotally engaging the off lever 223, respectively. The opening and closing lever 223 is pivoted on the opening and closing lever pin shaft 2113 through lever slots 22311 on two side plates, then one end of the energy storage spring 224 passes through a strip-shaped opening 22322 on the lever transverse plate 2232 and then is hung on an energy storage spring fixing shaft 227 mounted in a strip-shaped groove 22321, and the other end of the energy storage spring 224 is hung on a connecting rod pin shaft 225 of the upper connecting rod 221 and the lower connecting rod 222, so that the energy storage spring 224 is conveniently mounted, the opening and closing lever 223 is turned inwards before being mounted, two hanging points of the energy storage spring 224 are close to each other as much as possible, and the energy storage spring 224 can be mounted under free length, so that a top plate 2233 on the opening and closing lever 223 is not easy to be too long and cannot be turned after being abutted against the frame 21.

As shown in fig. 5 and 6i, the connecting rod is divided into a first connecting rod 241 and a second connecting rod 242, the first connecting rod 241 is composed of a first transverse plate 2411 and a second transverse plate 2412 which are perpendicular to each other, the first transverse plate 2411 and the second transverse plate 2412 are both elongated, and two ends of the first transverse plate 2411 are provided with a closing and opening lever pin shaft hole 24111 for connecting the lever side plates 2231 of the two closing and opening levers 223. The middle part of the second transverse plate 2412 is provided with a manual operation hole 24121 into which the manual operation rod 27 can be inserted, two end parts of the second transverse plate 2412 form a driving plate 24122, and one side of the end part of the driving plate 24122 is provided with a first driving boss 241221 for driving a switch-on ready position indicator (not shown in the figure) of the change-over switch. The second connecting rod 242 is a long bar-shaped transverse plate, two ends of the transverse plate are symmetrically provided with a closing and opening lever pin shaft hole 2421, and one end of the transverse plate is provided with a second driving boss 2422 for driving the signal switch 3.

As shown in fig. 5 and 6h, the manual operation lever 27 is an elongated square bar or a round bar. A hinge hole 271 is provided in the radial direction of the manual lever 27, and a manual operation hole 272 is provided in the axial direction of the manual lever 27.

As shown in fig. 3 to 5 and fig. 6d and 6i, the opening and closing lever pin shaft holes 24111 at two ends of the first transverse plate 2411 of the first link 241 are respectively penetrated through the link pin shaft 22312 at one side of the opening and closing lever 223 of the first spring mechanism 22 and the second spring mechanism 22', the opening and closing lever pin shaft holes 2421 at two ends of the second link 242 are respectively penetrated through the link pin shaft 22312 at the other side of the opening and closing lever 223 of the first spring mechanism 22 and the second spring mechanism 22', and the opening and closing lever 223 of the first spring mechanism 22 and the second spring mechanism 22' are connected through the first link 241 and the second link 242, and the rotation centers of the two opening and closing levers and the hinge points of the two levers form a parallelogram structure. One end of the manual lever 27 with the axial hole 272 is inserted into the manual operation hole 24121 of the first link 241, and the hinge hole 271 of the manual lever 27 is passed through the positioning shaft 2118 on the upper side of the output shaft center hole 2111 of the side plate 211.

As shown in fig. 5, support shafts 212 are symmetrically arranged between two side plates 211, so that a hollow structure is formed between the two side plates, and the support shaft 212 positioned on the upper side is an upper connecting rod lower limit shaft 2121 and is used for being matched with a lower limit impact surface 22116 of an upper connecting rod 221; the support shaft 212 on the lower side is a lower link limit shaft 2122 for mating with the lower link 222. An upper link upper limit boss 2114 is provided at an upper side edge of the side plate 211 of the frame 21 to protrude inward for being engaged with the upper limit striking surface 22115 of the upper link 221. Of course, the upper limiting boss 2114 of the upper link is not limited to the protruding structure of the side plate 211, and may be realized by riveting the shaft on the side plate 211, and in the same way, the lower limiting shaft 2121 of the upper link may also be formed by protruding the side plate 211, that is, all the limiting shafts for limiting may be formed by protruding the side plate, and all the limiting bosses of the present invention may be realized by riveting the shaft.

As shown in fig. 5 and fig. 6a, 6b, 6c and 6d, the first driving electromagnet 25 and the second driving electromagnet 25' are solenoid type electromagnets, which have the same structure and are symmetrically disposed on two sides of the output shaft 23, and each of the first driving electromagnet and the second driving electromagnet comprises a movable iron core 251, a stationary iron core 252, a coil 253, a magnetic yoke 254, a return spring 255, a solenoid 256, a movable iron core fixing bracket 257, a pair of electromagnet connecting rods 258 and a long pin 259, wherein the magnetic yoke 254 comprises a magnetic yoke cover 2541 and a magnetic yoke cover 2542, and the magnetic yoke cover 2541 and the magnetic yoke cover 2542 are riveted together through riveting bosses and riveting holes. The top of the yoke cover 2541 is provided with a yoke cover guiding hole 25411 for guiding the movable iron core, and two sides of the yoke 254 are provided with positioning bosses 25412 for being matched with the side plates 211 of the frame 21. The magnetic yoke 254 is internally provided with a movable iron core 251, a static iron core 252, a coil 253, a return spring 254 and a solenoid 256, the movable iron core 251 is a step shaft, a section of limiting boss 2511 is arranged in the middle of the step shaft, two ends of the limiting boss 2511 are respectively a shaft section with a larger shaft diameter and a shaft section with a smaller shaft diameter, one end of the shaft section with the smaller shaft diameter is provided with a pin shaft hole 2512 along the radial direction, and the shaft section with the larger shaft diameter is arranged on the static iron core 252. The stationary core 252 is mounted on the yoke cover plate 2542, and a step 2521 is machined on the stationary core. One end of the return spring 255 abuts against the limit boss 2511 of the movable iron core 251, and the other end abuts against the step 2521 of the stationary iron core 252. The solenoid 256 is sleeved outside the movable iron core 251 and the static iron core 252, the solenoid material is non-magnetic conductive material, and a coil 253 is arranged outside the solenoid 256. When the coil 253 is energized, the stationary core 252 attracts the movable core 251 to move in a direction toward the stationary core 252, and when the coil 253 is deenergized, the movable core 251 moves in a direction away from the stationary core 252 due to the spring force of the return spring 255. Since the movable core 251 of the driving electromagnet on one side of the present invention is attracted to the stationary core 252 and the movable core 251 of the driving electromagnet on the other side is separated from the stationary core 252 by the link 24 after the driving electromagnet is energized, the present invention does not need to provide the return spring 255. The movable iron core fixing support 257 is fixedly arranged above the magnet yoke cover 2541, a support guide hole 2571 for guiding the movable iron core 251 is formed in the middle of the movable iron core fixing support 257, a flange 25711 is arranged on the circumferential edge of the support guide hole 2571, the flange 25711 extends downwards and stretches into the magnet yoke cover guide hole 25411, and therefore the movable iron core 251 and the magnet yoke 254 are isolated from each other. A lower link stopper boss 2572 is provided at one end of the movable core fixing bracket 257. The movable iron core fixing bracket 257 is provided with a mounting boss 2573 on the other side opposite to the side provided with the lower connecting rod limiting boss 2572, and for the three-phase dual-power transfer switch, the connecting terminal of the N-phase wire taking wire of the controller is inserted with the mounting boss 2573. The two sides of the movable iron core fixing support 257 are provided with fixing bosses 2574 for being matched and installed with the side plates 211 of the stand 21. The first driving electromagnet 25 and the second driving electromagnet 25 'are respectively fixed on the driving electromagnet mounting bosses 2115 at two ends of the side plate 211, the positioning boss 25412 on the magnetic yoke 254 is inserted into the magnetic yoke positioning notch 21152 of the mounting boss 2115, the fixing boss 2574 on the movable iron core mounting bracket 257 abuts against the bracket mounting notch 21151 of the driving electromagnet mounting boss 2115, and screws penetrate through the fixing holes on the electromagnet mounting boss 2115 to screw into four screw holes distributed around the magnetic yoke cover guiding holes 25411, so that the first driving electromagnet 25 and the second driving electromagnet 25' are mounted and fixed. The pair of electromagnet connecting rods 258 has a strip-shaped annular structure, and a hinge hole 2582 with a width larger than that of the slot opening is formed at one end of the annular strip-shaped slot opening 2581. One ends of the pair of electromagnet connecting rods 258 are respectively sleeved on electromagnet connecting rod pin shafts 22313 on two sides of the opening and closing lever 223, and the other ends of the pair of electromagnet connecting rods 258 are connected with pin shaft holes 2512 on the movable iron core 251 through a long pin shaft 259. A limiting chute 2116 for sliding the long pin 259 is disposed above the driving electromagnet mounting boss 2115, a closing lever limiting boss 2117 is disposed on the limiting chute 2116 near the outer side of the side plate 211 and protrudes inwards, it should be noted that, the closing lever limiting boss 2117 is not limited to the above-mentioned position, but in the double-split (the closing ready position of the first spring mechanism) shown in fig. 8a, a closing lever limiting boss two 2120 is disposed at the position of the side plate 211 corresponding to the closing lever of the second spring mechanism 22', and another closing lever limiting boss two 2120 is disposed on the side plate 211 corresponding to the closing lever limiting boss two 2120, the closing lever limiting boss two 2120 can replace the closing lever limiting boss 2117, one pair of closing lever limiting bosses two 2120 and one pair of closing lever limiting bosses 2117 can be alternatively disposed, and the closing lever limiting boss 2117 is disposed in fig. 5, because: in this case, if the two limiting bosses 2120 of the closing and opening lever are provided to limit the right closing and opening lever, as the closing and opening levers on both sides are connected by the connecting rod 24, the limiting of the left closing and opening lever is also performed, and of course, two pairs of the closing and opening levers may be provided together, as shown in fig. 8a to 9 b.

As shown in fig. 5 and 7a, the locking device 28 includes a fixing frame 281, a first locking member 282, a second locking member 282 'and a trigger electromagnet 284, where the first locking member 282 and the second locking member 282' are two sets of identical components symmetrically disposed on the fixing frame 281, and each set of identical components includes a locking buckle 2821, a locking buckle 2822, a locking buckle return spring 2823 for keeping the locking buckle 2821 pushing the locking buckle 2822, and a locking buckle return spring 2824 for keeping the locking buckle limiting the operating mechanism.

The latch return spring 2823 and the latch return spring 2824 may be two independent springs acting on the latch 2821 and the latch 2822 respectively; it is also possible to have two catch arms of a spring as in fig. 7a, with a mounting hole in between the snap return spring 2823 and the snap return spring 2824.

As shown in fig. 7a and 7c, the fixing frame 281 is composed of two fixing frame side plates 2811 and a fixing frame transverse plate 2812, wherein the two fixing frame side plates 2811 and the fixing frame transverse plate 2812 are arranged face to face in the same structure, and a fixing frame through hole 28121 is arranged in the center of the fixing frame transverse plate 2812. The middle part of one of the fixing frame side plates 2811 and the fixing frame transverse plate 2812 is provided with a wiring groove 28111 for arranging coil wires for supplying power to the trigger magnet 284, and one end of the two fixing frame side plates 2811 far away from the fixing frame transverse plate 2812 is outwards protruded with a fixing boss 28112 for fixing the locking device 28 on the mounting bracket 21. A pair of lugs 28113 are respectively arranged on two sides of the two fixing frame side plates 2811, which are close to the fixing frame transverse plate 2812, a hasp mounting pin shaft hole 281131 for hinging a hasp 2821 is arranged on each lug 28113, and a pair of pin shaft holes 28114 hinged with a hasp 2822 are arranged on two sides of the central position of the two fixing frame side plates 2811.

As shown in fig. 7a and 7d, the latch 2821 includes a latch lever 28213 and a trip lever 28212 extending to both sides with a pivot point, the pivot point of the latch 2821 is a latch shaft hole 28211 having an opening, and a trip lever 28212 is disposed at one radial side of the latch shaft hole 28211 for manual unlocking. A latch lever 28213 is provided on the other radial side of the latch shaft hole 28211 for cooperating with a limit lever 28221 of the latch 2822, and also for electric unlocking. Preferably, in this embodiment, the lever body of the latch lever 28213 (see fig. 7 a) is functionally divided into two parts, one part is an electric trip lever 282130 (see fig. 7 d) extending in the middle of the axial direction of the latch shaft hole 28211, the other part is a limiting boss 28214 (see fig. 7 d) respectively disposed at two axial ends of the latch shaft hole 28211, the latch shaft hole 28211 extends in the center of the limiting boss 28214 to form a central hole 282141, and the end surface of the limiting boss 28214 is configured as a latch limiting surface 282142 matched with the latch 2822. Preferably, as shown in fig. 7f and 7e, a pin limiting boss 282110 for axially limiting the pin 286 is disposed in the middle of the lock shaft hole 28211, and is in snap fit with a neck 2861 disposed in the middle of the pin 286. A return spring mounting groove 28215 for mounting the snap return spring 2823 and the snap return spring 2824 is provided between the limit boss 28214 and the trip lever 28212 and the electric trip lever 282130. The snap return spring 2823 functions to keep the snap 2821 in a pushing tendency against the snap 2822. The end of the electric trip lever 282130 is provided with a notch 282131. The latch lever 28213 is not limited to the above embodiment, and the stopper boss 28214 and the electric trip lever 282130 may be integrally formed.

As shown in fig. 7a, 7d, 7e and 6e, the latch 2822 includes a stopper rod 28221 and a latch rod 28222 extending to both sides with the rotation center thereof, the latch return spring 2824 acts on the stopper rod 28221, the stopper rod 28221 cooperates with the latch rod 28213, and the latch rod 28222 cooperates with the upper link 221. The rotation center of the lock catch 2822 is a fixed frame hinge hole 28223 in which the lock catch 2822 is hinged with the fixed frame 281, the limit rod 28221 and the lock catch rod 28222 are positioned on two sides of the fixed frame hinge hole 28223, and the lock catch rod 28222 is provided with a lock catch surface 282221 matched with the upper connecting rod limit locking surface 22114. A snap-fit stop surface 282211 is provided on the stop lever 28221, and a stop end surface 2822111 for mating with the bottom surface of the stop boss 28214 is formed at the end of the snap-fit stop surface 282211. The locking surface 282221 and the locking limiting surface 282211 are respectively arranged at two sides of the hinge hole 28223 of the fixing frame, an opening 282212 is arranged at one end of the middle position of the limiting rod 28221, which is close to the locking limiting surface 282211, and the opening 282212 is used for avoiding the electric trip rod 282130 of the locking buckle 2821. The latch return spring 2824 abuts against the limit rod 28221 of the latch 2822, so that the latch 2822 keeps the limit trend on the upper connecting rod 221.

As shown in fig. 7a and 7b, the triggering electromagnet 284 includes a stationary core 2841, a movable core 2842, a coil 2843, a yoke 2844, a return spring 2845 and a push rod 2846, the yoke 2844 includes a yoke cover 28441 and a yoke cover 28442, which are riveted together through a riveting boss and a riveting hole, and the yoke cover 28442 is provided with a coil boss mounting hole 284421. The yoke 2844 is internally provided with a movable iron core 2842, a static iron core 2841, a coil 2843 and a return spring 2845. The stationary core 2841 is riveted to the yoke cover 28441. The static iron core 2841 and the movable iron core 2842 are respectively provided with step holes 28411 and 28421, and the return spring 2845 is abutted against the step holes 28411 and 28421. The coil 2843 is sleeved outside the static iron core 2841 and the movable iron core 2842, the coil 2843 comprises a coil framework 28431, and one end of the coil framework 28431 is provided with a circular boss 284311 protruding upwards. The circular boss 284311 is accommodated in the coil boss mounting hole 284421 of the yoke cover 28442, and the circular boss 284311 partitions the movable iron core 2842 from the yoke 2844. The push rod 2846 is made of non-magnetic materials and consists of a disc-shaped driving boss 28461 and a long screw 28462, the long screw 28462 on the push rod 2846 respectively penetrates through the magnet yoke 2844, the static iron core 2841 and the return spring 2845 and then is adhered to the movable iron core 2842 into a whole through riveting or glue, and the push rod 2846 enables the disc-shaped driving boss 28461 to be abutted against the magnet yoke surface on the side of the static iron core 2841 under the action of the return spring 2845, so that a gap is generated between the movable iron core and the static iron core. The electric trip lever 282130 has a downward pushing force on the push rod 2846 as in the position of fig. 7a due to the snap return spring 2823, i.e., a pushing force for separating the moving and static cores, in which case the return spring 2845 may not be provided.

The disc-shaped driving boss 28461 of the trigger electromagnet 284 passes through the fixing frame through hole 28121 on the fixing frame transverse plate 2812 and then is positioned above the fixing frame transverse plate 2812. The pin 285 passes through both the mount hinge hole 28223 on the mount 2822 and the mount mounting pin hole 28114 on the mount 281 to symmetrically hinge the mount 2822 to the mount side plate 2811. The pin 286 is hinged to the snap mounting pin hole 281131 on the fixing frame lug 28113 after passing through the central hole 282141, the lock shaft hole 28211, the snap return spring 2823 and the mounting hole of the snap return spring 2824 on the snap 2821.

As shown in fig. 7a and 7c, the electric trip lever 282130 in the first latch member 282 and the second latch member 282' are respectively located in the opposite notch 282131, a disc-shaped driving boss 28461 of an electromagnet push rod is directly below the electric trip lever 282130, and the latch 2821 and the latch 2822 make the latch limiting surface 282211 on the latch 2822 abut against the latch limiting surface 282142 of the latch 2821 under the action of the latch return spring 2823. When the trigger electromagnet 284 is powered off, the push rod disc-shaped driving boss 28461 is buried in the fixing frame through hole 28121 of the fixing frame 281, and the electric trip rod 282130 of the hasp 2821 abuts against the surface of the fixing frame transverse plate 2812. When the trigger electromagnet 284 is powered on, the push rod disc-shaped driving boss 28461 jacks up and extends out of the fixing frame through hole 28121, so that the electric tripping rod 282130 of the hasp 2821 is pushed, the hasp 2821 and the hasp 2822 are separated from each other, and unlocking is achieved.

As shown in fig. 5, 7a and 7c, the fixing frame side plate 2811 of the locking device 28 is provided with a mounting positioning surface 28115, the side plate 211 of the operating mechanism is provided with an opening at the upper side of the output shaft center hole 2111, the locking device 28 is matched with the positioning boss surface 2119 of the opening at the upper side of the output shaft center hole 2111 of the side plate 211 through the mounting positioning surface 28115, as shown in fig. 4, and is fixed through the fixing boss surface 28112 on the fixing frame side plate 2811, and is screwed into the side plate 211 after passing through the fixing hole 281121 of the fixing boss surface 28112 through a screw.

The operating mechanism 2 of the present invention has the following principle of operation:

as shown in fig. 8a, when the switch is in the double-split position and the operating mechanism 2 is in the first spring mechanism 22 closing ready position: the upper link 221 in the first spring mechanism 22 is under the spring force of the energy storage spring 224, the upper link limit locking surface 22114 of the upper link 221 is in contact with the locking surface 282221 on the lock catch 2822 in the first locking piece 282, so that the lock catch 2822 overcomes the self spring force and keeps rotating anticlockwise around the rotation center thereof, and the lock catch 2822 keeps static due to the fact that the lock catch limit surface 282211 at the other end of the lock catch 2822 is in contact with the lock catch limit surface 282142 on the lock catch 2821, and the direction of the force of the lock catch 2822 on the lock catch 2821 passes through the rotation center of the lock catch 2821, so that the lock catch 2821 keeps motionless under the self spring force and the action of the frame 21, and the upper link 221 of the first spring mechanism 22 is locked at the upper link limit boss 2114. The free end of the upper link 221 of the second spring mechanism 22' is lifted up around the center of rotation by the tension of the energy storage spring 224 and abuts against the upper link upper limit boss 2114. At this time, since the lower link 222 in the first spring mechanism 22 and the lower link 222 in the second spring mechanism 22' are both positioned at the upper end of the chute 2321 of the output shaft 23, the output shaft 23 is kept at the middle horizontal position, and the contact mechanism driven by the output shaft 23 stays at the second contact position, so as to realize the double-split position of the switch. The opening and closing lever 223 in the first spring mechanism 22 is connected with the opening and closing lever 223 in the second spring mechanism 22' through a connecting rod 24 to form a parallelogram structure. When the first driving electromagnet is powered on, the movable iron core 251 and the static iron core 252 of the first driving electromagnet 25 are attracted, and when the first driving electromagnet is powered off, the movable iron core moves away from the static iron core under the action of the return spring 255, but the clockwise rotation moment generated by the energy storage spring 224 in the first spring mechanism 22 on the on-off lever 223 in the first spring mechanism 22 is smaller than the counterclockwise rotation moment generated by the energy storage spring 224 in the second spring mechanism 22 'on the on-off lever 223 of the second spring mechanism 22', the on-off lever 223 of the first spring mechanism 22 abuts against the on-off lever limiting boss 2117, and the movable iron core 251 of the first driving electromagnet 25 is pressed downwards (in the state of fig. 8 a), so that the movable iron core 251 of the first driving electromagnet 25 is located at the lower position, and at the moment, the movable iron cores 251 and 252 of the second driving electromagnet 25 'are located at the separated position, and the movable iron core 252 of the second driving electromagnet 25' is located at the upper position. The movable parts of the operating mechanism 2 can be stably maintained in this position.

In the above mechanism state, if the first spring mechanism 22 needs to be switched on, the principle of the action process is as follows: when the trigger electromagnet 284 of the locking device 28 is electrified to trigger the moving and static iron cores of the electromagnet to be attracted, the push rod 2846 is driven to push the electric unlocking rod 282130 or the unlocking rod 28212 of the lock catch 2821 in the first locking piece 282 is pressed, the left locking rod 28213 rotates anticlockwise, after the limit of the lock catch 2821 is lost by the lock catch limiting surface 282211 on the lock catch 2822, the free end of the upper connecting rod 221 of the first spring mechanism 22 pushes the locking surface 282221 under the action of the pulling force released by the energy storage spring 224, so that the lock catch 2822 rotates anticlockwise around the hinging point, the upper connecting rod 221 is unlocked and rotates clockwise around the hinging point, and one end of the lower connecting rod 222 is driven to move from one end to the other end of the sliding groove 2321 of the output shaft 23, and the lower connecting rod 222 and the output shaft 23 are driven to rotate anticlockwise by a certain angle together. Finally, the free end of the upper link 221 of the first spring mechanism 22 abuts against the upper link lower limit shaft 2121, so that a rigid supporting structure is formed at a hinge point between the upper link 221 and the lower link 222 through a dead point position (the upper link 221 and the lower link 222 are approximately 180 °), and the output shaft 23 is driven to rotate anticlockwise, thereby driving the contact mechanism to act. In this process, after the lock catch 2822 is unlocked, a clockwise rotation force is generated under the action of the self spring force, and the limiting end surface 282222 of the lock catch rod 28222 abuts against the sliding limiting surface 22113 of the upper connecting rod 221. The lower link 222 in the second spring mechanism 22 'provides a certain degree of freedom with the output shaft 23, so that when the first spring mechanism 22 is closed, the lower link 222 in the second spring mechanism 22' can slide correspondingly in the sliding slot 2321 of the output shaft 23, so that the closing lever 223 and the upper link 221 of the second spring mechanism 22 'are kept stationary, and meanwhile, each link in the second spring mechanism 22' is kept at the original position under the action of the energy storage spring 224, as shown in fig. 8b. Preferably, the angle between the output arm 232 and the lower link 222 (the angle towards the driving electromagnet 25) is 75 ° to 80 ° at the position shown in fig. 8b, so that one component of the reaction force of the contact mechanism to the lower link 222 passes through the rotation center of the output shaft 23 (the force keeps the output shaft pin 226 on the lower link at the end of the chute 2321 near the rotation center of the output shaft), and the other component passes through the hinge axes of the upper link 221 and the lower link 222. When the first contact closing position is reached, the lower link limiting shaft 2122 on the first spring mechanism 22 side acts on the lower link transverse plate 2222 of the corresponding lower link 222, and limits the output shaft pin 226 on the lower link 222 at one end of the sliding groove 2321 close to the rotation center of the output shaft 23, so that the contact pressure of the moving contact and the static contact in the first contact position is ensured, and the specific structure is shown in fig. 10a, so that the operating mechanism cannot slide due to the reasons of closing bounce, contact wear and the like, and finally the contact over-travel pressure is reduced. When the electromagnet 284 is triggered by the locking device to lose electricity or the pressing force on the unlocking rod 28212 is removed, the left hasp 2821 is reset under the action of the spring, the lower bottom surface of the limiting boss 28214 of the left hasp is abutted against the limiting end surface 2822111, and the correctness of the subsequent brake separating action is ensured. In this process, the upper link 221 of the second latch member 282 'is kept at the same position as the moment when the first latch member is ready to close by the tension of the energy storage spring 224 and the upper limit boss 2114 of the upper link, so that the latch 2822 of the second latch member 282' is kept still, and therefore, even if the trigger electromagnet 284 is energized or presses the release lever 28212 of the second latch member 282', the latch 2822 of the second latch member 282' and the upper link 221 of the second latch member 22 'remain locked, and the second latch member 282' remains in place. In the closing state of the first spring mechanism, after the first driving electromagnet 25 is powered on and the moving and static iron cores are attracted, the moving iron core 251 of the first driving electromagnet 25 is kept at the lower position by the action of the return spring 255 after the moving iron core 251 of the first driving electromagnet 25 is cut off, however, as shown in fig. 8b, under the action of the tension of the energy storage spring 224 of the first spring mechanism 22, the closing and opening lever 223 of the first spring mechanism 22 abuts against the closing and opening lever limiting boss 2117, the upper connecting rod 221 of the first spring mechanism 22 abuts against the upper connecting rod lower limiting shaft 2121, and has downward pressure (in the state of fig. 8 b) on the moving iron core 251 of the first driving electromagnet 25, so that the moving iron core 251 of the first driving electromagnet 25 is kept at the lower position, the closing and opening lever 223 of the second spring mechanism 22' is kept at the upper limiting boss 2114 by the action of the energy storage spring 224 of the second spring mechanism 22', the moving iron core 251 of the second driving electromagnet 25' is kept at the whole closing state of the moving electromagnet 25, and the moving electromagnet 252 is kept at the whole state of the first driving electromagnet 2.

In the above mechanism state, when the second driving electromagnet 25 'is energized, the movable iron core 251 of the second driving electromagnet 25' moves downward, and the movable iron core 251 of the second driving electromagnet 25 'drives the on-off lever 223 in the second spring mechanism 22' to rotate clockwise through the electromagnet link 258, and since the on-off lever 223 of the first spring mechanism 22 and the on-off lever 223 of the second spring mechanism 22 'form a parallel four-bar linkage structure through the link 24, the on-off lever 223 of the first spring mechanism 22 rotates clockwise together with the on-off lever 223 of the second spring mechanism 22'. The energy storage spring 224 in the second spring mechanism 22' starts to switch on and store energy, the energy storage spring 224 in the first spring mechanism 22 starts to switch off and store energy, and when the energy storage spring 224 in the first spring mechanism 22 crosses the dead point position (when the two ends of the energy storage spring 224 are in the same line with the rotation center of the upper connecting rod 221), as shown in fig. 8c. The free end of the upper link 221 of the first spring mechanism 22 rotates counterclockwise around the hinge point under the action of the tension released by the energy storage spring 224, and drives one end of the lower link 222 to slide from one end of the output shaft 23 to the other end, so that the lower link 222 and the output shaft 23 are driven to rotate clockwise by a certain angle together, and the limiting end face 282222 of the locking rod 28222 of the lock 2822 in the first locking piece 282 always slides along the sliding limiting surface 22113 on the outer circumference of the upper link 221. Finally, the free end of the upper link 221 of the first spring mechanism 22 abuts against the upper link upper limit boss 2114, completing the opening of the brake. At this time, the catch 2822 rotates clockwise under the action of the self spring force, and slides from the sliding limiting surface 22113 of the upper link 211 to the upper link limiting locking surface 22114 of the upper link 221, the limiting end surface 2822111 of the catch 2822 slides away from the bottom surface of the limiting boss 28214, so as to release the limitation of the catch rod 28213, and the catch 2821 rotates clockwise under the action of the self spring force until the electric release rod 282130 abuts against the fixed plate transverse plate 2812, thereby realizing the automatic reset of the first catch piece 282. At this time, the energy storage spring 224 of the second spring mechanism 22' just crosses over the dead point position and reaches the closing ready position, as shown in fig. 8d, under the action of the energy storage spring 224, the upper link rod limit locking surface 22114 of the upper link rod 221 in the second spring mechanism 22' is in conflict with the locking surface 282221 on the locking catch 2822 in the second locking catch piece 282', so that the locking catch 2822 overcomes the tendency of clockwise rotation around the rotation center after the self spring force, but because the limit surface at the other end of the locking catch 2822 is in conflict with the locking catch limit surface 282142 on the locking catch 2821 and the direction of the force passes through the rotation center of the locking catch 2821, the locking catch 2821 is kept motionless under the action of the self spring force, so that the upper link rod 221 of the second spring mechanism 22' locks the upper link rod limit boss 2114 to complete closing energy storage of the second spring mechanism 22 '. At this time, since the lower link 222 in the first spring mechanism 22 and the lower link 222 in the second spring mechanism 22 'are both positioned at the upper end of the chute of the output shaft 23, the output shaft 23 is kept at the middle horizontal position, so as to realize the double-split position of the mechanism, at this time, the operating mechanism 2 is positioned at the switch-on ready position of the second spring mechanism 22', the switch-on/off lever 223 of the second spring mechanism 22 'is limited by the switch-on/off lever limiting boss 2117 corresponding to the second spring mechanism 22', and the upper link 221 of the first spring mechanism 22 is limited by the upper link upper limiting boss 2114 corresponding to the first spring mechanism 22. The second driving electromagnet 25 'pulls down the on-off lever 223 of the second spring mechanism 22', and at the same time, the on-off lever 223 of the first spring mechanism 22 pulls the movable iron core 251 of the first driving electromagnet 25 to move upward through the electromagnet connecting rod 258. In the process from closing to opening of the first spring mechanism 22 as shown in fig. 8b to 8d, since the lower link limiting shaft 2122 on the side of the first spring mechanism 22 acts on the lower link transverse plate 2222 of the corresponding lower link 222, the output shaft pin 226 on the lower link 222 is limited at one end of the sliding groove 2321 near the rotation center of the output shaft 23, so that in the process of opening and closing the lower link, the output shaft pin hinged with the output shaft of the lower link is always located inside the sliding groove of the output shaft until the opening is in place, and the contact opening speed is faster.

In the above mechanism state, if the second power supply is to be switched on, the second spring mechanism 22 'is switched on, and the position shown in fig. 8e is reached, and at this time, the operating mechanism 2 is located at the second spring mechanism 22' switching on position, and the upper link 221 of the second spring mechanism 22 'is limited by the upper link lower limit shaft 2121 corresponding to the second spring mechanism 22', and the upper link 221 of the first spring mechanism 22 is limited by the upper link upper limit boss 2114 corresponding to the first spring mechanism 22. The action principle process is consistent with the closing principle of the first spring 22. When the second contact closing position is reached, the lower link limiting shaft 2122 on the second spring mechanism 22' side acts on the lower link transverse plate 2222 of the corresponding lower link 222, and limits the output shaft pin 226 on the lower link 222 at one end of the sliding groove 2321 near the rotation center of the output shaft 23, so that the contact pressure of the moving contact and the static contact in the second contact position is ensured, and the specific structure is shown in fig. 10b.

As shown in fig. 8d, in the state that the second spring mechanism 22' is ready for closing, if the first spring mechanism 22 is to be closed, the energy storage state of the energy storage spring 224 of the mechanism needs to be switched, and the action principle is as follows: when the first driving electromagnet 25 is electrified, the movable iron core 251 of the first driving electromagnet 25 moves downwards, so that the first spring mechanism 22 and the switching-on and switching-off lever 223 in the second spring mechanism 22 'are driven to rotate anticlockwise around the respective rotation centers, the energy storage spring 224 in the first spring mechanism 22 starts to switch on and store energy, the energy storage spring 224 in the second spring mechanism 22' starts to switch off and store energy, and after the energy storage spring 224 in the first spring mechanism 22 crosses over the dead point position, the rotation of the upper connecting rod 221 is limited due to the action of the locking surface 282221 of the first locking piece 282, and therefore, the upper connecting rod 221 and the lower connecting rod 222 of the first spring mechanism 22 are kept unchanged in situ. After the energy storage spring 224 of the second spring mechanism 22' crosses the dead point position, the upper link 221 and the lower link 222 thereof remain unchanged due to the existence of the upper link limit boss 2114. The above procedure just completes the switching of the first spring means 22, the second spring means 22' to the closing ready position.

As shown in fig. 8b and 8e, when the lower link limiting boss 2572 of the movable iron core fixing bracket 257 moves from the opening position to the closing position, the impact between the lower link cross plate 2222 and the lower link limiting boss 2572 causes the output shaft pin 226 of the lower link 222 to slide from the outermost side to the innermost side of the chute 2321 of the output shaft 23 at the initial stage of movement, thereby ensuring the correct mechanism action.

The three-position switch of the present invention becomes a two-position switch as follows:

the locker 28 is removed from the three-position switch operating mechanism. As shown in fig. 9a, the initial position of the mechanism is in the closing state of the second spring mechanism 22', when the first spring mechanism 22 needs to be closed, the first driving electromagnet 25 is electrified, and the movable iron core 251 of the first driving electromagnet 25 moves downwards, so that the connecting rod 24 drives the closing and opening levers 223 of the first and second spring mechanisms 22 and 22' to rotate anticlockwise around the respective rotation centers together, the energy storage spring 224 in the first spring mechanism 22 starts to close and store energy, and the energy storage spring 224 in the second spring mechanism 22' starts to open and store energy. When the energy storage spring 224 in the second spring mechanism 22' crosses over the dead point, the free end of the upper connecting rod 221 in the second spring mechanism 22' can rotate clockwise around the hinge point under the action of the tension released by the energy storage spring 224 and drive the lower connecting rod 222, meanwhile, the lower connecting rod 222 drives the output shaft 23 to rotate anticlockwise, and when the free end of the upper connecting rod 221 abuts against the upper limiting boss 2114 of the upper connecting rod, the second spring mechanism 22' is opened. At this time, the energy storage spring 224 in the first spring mechanism 22 just crosses over the dead point, and the free end of the upper link 221 in the first spring mechanism 22 rotates clockwise around the hinge point under the action of the tension released by the energy storage spring 224, and drives one end of the lower link 222 to slide from one end to the other end of the chute of the output shaft 23, so as to drive the lower link 222 and the output shaft 23 to rotate counterclockwise by a certain angle. Finally, the free end of the upper link 221 abuts against the upper link lower limit shaft 2121, completing the closing of the first spring mechanism, as shown in fig. 9 b. The first driving electromagnet 25 pulls down the on-off lever 223 of the first spring mechanism 22, and at the same time, the on-off lever 223 of the second spring mechanism 22 'pulls up the moving core 151 of the second driving electromagnet 25' through the electromagnet link 258. In the actual action process, in the opening process of the first spring mechanism and in the closing and opening process of the second spring mechanism, the motion of the output shaft pin shafts 226 on two sides of the output shaft 23 in the two sliding grooves 2321 and the rotation of the output shaft 23 driven by the spring mechanisms on two sides are synchronously performed.

In the above-described mechanism state, if the second spring mechanism 22' is to be switched on, the operation principle process is identical to the switching-on principle of the first spring mechanism 22.

The operating mechanism of the three-position double-power-supply change-over switch has four positions: the first spring mechanism 22 is at a closing position, and corresponds to the closing position of the first power supply; the first spring mechanism 22 is at a ready position for closing, at this time, the corresponding switch is at a double-split position, and then the first spring mechanism 22 can be closed only by triggering the first locking piece 282 corresponding to the first spring mechanism 22; the second spring mechanism 22 'is at a ready position for closing, and at the moment, the second spring mechanism 22' can be closed only by triggering the second catch piece 282 'corresponding to the second spring mechanism 22'; the second spring mechanism 22' is in a closing position, and corresponds to a second power supply closing position of the switch.

Claims

1. The three-position double-power-supply change-over switch comprises a contact mechanism and an operating mechanism (2), wherein the contact mechanism is provided with a first contact closing position for enabling a first power supply to be switched on, a double-dividing position for enabling the first power supply and a second power supply to be equally divided and a third contact closing position for enabling the second power supply to be switched on, and the operating mechanism (2) can drive the contact mechanism to switch among the first power supply switching-on position, the double-dividing position and the second power supply switching-on position; the method is characterized in that: the operating mechanism (2) comprises an energy storage device, an output shaft (23) connected with the contact mechanism and a locking device (28); the energy storage device comprises a first spring mechanism (22), a second spring mechanism (22 ') and a connecting rod (24) for connecting the first spring mechanism (22) and the second spring mechanism (22'); the operating mechanism (2) is provided with a first spring mechanism (22) closing position corresponding to the first power supply closing position, a first spring mechanism (22) closing ready position corresponding to the double-split position, a second spring mechanism (22 ') closing ready position corresponding to the second power supply closing position, and a second spring mechanism (22') closing position corresponding to the second power supply closing position; when the operating mechanism (2) is positioned at a closing ready position of the first spring mechanism (22), the locking device (28) limits the first spring mechanism (22), the first spring mechanism (22) is in a closing energy storage state, at the moment, the limit of the locking device (28) to the first spring mechanism (22) is released, the first spring mechanism (22) releases energy, and the operating mechanism (2) moves to a closing position of the first spring mechanism (22); when the operating mechanism (2) is located at a closing ready position of the second spring mechanism (22 '), the locking device (28) limits the second spring mechanism (22'), the second spring mechanism (22 ') is in a closing energy storage state, at the moment, the limit of the locking device (28) to the second spring mechanism (22'), the second spring mechanism (22 ') releases energy, and the operating mechanism (2) moves to a closing position of the second spring mechanism (22').

2. The operating mechanism of a three position dual power transfer switch of claim 1, wherein: the energy storage device also comprises a first driving electromagnet (25) and a second driving electromagnet (25 '), wherein the first driving electromagnet (25) electrically drives the first spring mechanism (22) to store energy and then reaches a switch-on ready position of the first spring mechanism (22), and the second driving electromagnet (25') electrically drives the second spring mechanism (22 ') to store energy and then reaches a switch-on ready position of the second spring mechanism (22').

3. The operating mechanism of a three-position dual-power change-over switch according to claim 2, wherein the operating mechanism (2) comprises a frame (21), the output shaft (23) is rotatably arranged on the frame (21) and is composed of a pair of output arms (232) symmetrically arranged around the rotation center of the output shaft, the first spring mechanism (22) and the second spring mechanism (22 ') are two sets of mechanisms symmetrically arranged around the rotation center of the output shaft (23), each of the mechanisms comprises an upper connecting rod (221), a lower connecting rod (222), a brake closing lever (223) and an energy storage spring (224), the brake closing lever (223) is pivotally arranged on the frame (21) and is connected with a movable iron core (251) of a driving electromagnet corresponding to each of the brake closing lever, one end of the upper connecting rod (221) is pivotally arranged on the frame (21), the other end of the energy storage spring (224) is hinged with the lower connecting rod (222), the other end of the energy storage spring (224) is connected with a hinge shaft which is hinged with the upper connecting rod (221) and the lower connecting rod (222), and the lower connecting rod (22 ') is connected with the corresponding output lever (22 ') of the brake closing lever (223).

4. A three-position double power change-over switch operating mechanism according to claim 3, characterized in that the locking device (28) comprises a fixing frame (281), a first locking piece (282) and a second locking piece (282 '), the fixing frame (281) is mounted on the frame (21), the first locking piece (282) and the second locking piece (282') are two sets of identical components symmetrically arranged according to the rotation center of the output shaft (23), and each of the two sets of identical components comprises a locking piece (2821) and a locking piece (2822) which are pivoted on the fixing frame (281), a locking piece reset spring (2823) which enables the locking piece (2821) to keep pushing and pressing trend to the locking piece (2822) and a locking piece reset spring (2824) which enables the locking piece (2822) to keep limiting trend to the upper connecting rod (221).

5. The operating mechanism of the three-position dual-power transfer switch as claimed in claim 3, wherein the operating mechanism (2) comprises a pair of upper connecting rod upper limit bosses (2114), a pair of upper connecting rod lower limit shafts (2121) and a pair of closing and opening lever limit bosses (2117) which are fixedly arranged on the frame (21) and symmetrical with the rotation center of the output shaft (23); when the operating mechanism (2) is positioned at a closing ready position of the first spring mechanism (22), a closing lever (223) of the first spring mechanism (22) is limited corresponding to a closing lever limiting boss (2117) at the side of the first spring mechanism (22), and an upper connecting rod (221) of the second spring mechanism (22 ') is limited corresponding to an upper connecting rod upper limiting boss (2114) at the side of the second spring mechanism (22'); when the second spring mechanism (22 ') is at a closing ready position, a closing lever (223) of the second spring mechanism (22 ') is limited corresponding to a closing lever limiting boss (2117) of the second spring mechanism (22 '), and an upper connecting rod (221) of the first spring mechanism (22) is limited corresponding to an upper connecting rod upper limiting boss (2114) of the first spring mechanism (22); when the operating mechanism (2) is positioned at the closing position of the first spring mechanism (22), a closing and opening lever (223) of the first spring mechanism (22) is limited by a corresponding closing and opening lever limiting boss (2117) on the side of the first spring mechanism (22), an upper connecting rod lower limiting shaft (2121) on the side of the first spring mechanism (22) limits an upper connecting rod (221) of the first spring mechanism (22), and an upper connecting rod (221) of the second spring mechanism (22 ') is limited by a corresponding upper connecting rod upper limiting boss (2114) on the side of the second spring mechanism (22'); when the operating mechanism (2) is located at the closing position of the second spring mechanism (22 '), the closing and opening lever (223) of the second spring mechanism (22 ') is limited by a closing and opening lever limiting boss (2117) corresponding to the second spring mechanism (22 '), the upper connecting rod (221) of the second spring mechanism (22 ') is limited by an upper connecting rod lower limiting shaft (2121) corresponding to the second spring mechanism (22 '), and the upper connecting rod (221) of the first spring mechanism (22) is limited by an upper connecting rod upper limiting boss (2114) corresponding to the first spring mechanism (22).

6. The operating mechanism of a three position dual power switch as claimed in claim 4, wherein said housing (21) includes a pair of side plates (211), said first spring means (22), said second spring means (22 ') and said output shaft (23) are disposed between said pair of side plates (211), said holder (281) includes a pair of holder side plates (2811), said first latch member (282) and said second latch member (282') are disposed between said pair of holder side plates (2811), said pair of holder side plates (2811) are respectively fixed to intermediate positions of upper ends of respective corresponding side plates (211).

7. The operating mechanism of a three position dual power transfer switch as claimed in claim 4, wherein said snap (2821) includes a trip lever (28212) and a snap lever (28213) extending to both sides with a rotation center thereof, said snap return spring (2823) acting on the trip lever (28212); the lock catch (2822) comprises a limit rod (28221) and a lock catch rod (28222) which extend to two sides with the rotation center of the lock catch, the lock catch return spring (2824) acts on the limit rod (28221), the limit rod (28221) is matched with the lock catch rod (28213), and the lock catch rod (28222) is matched with the upper connecting rod (221).

8. The operating mechanism of a three position dual power switch as claimed in claim 7, wherein said locking device (28) further comprises a trigger electromagnet (284), said trigger electromagnet (284) being electrically actuated to drive said locking lever (28213) to rotate, thereby rotating said locking lever (2821) to release said locking lever (28222) from said upper link (221).

9. The operating mechanism of a three-position dual-power switch as claimed in claim 7, wherein the latch lever (28222) is provided with a latch surface (282221), the upper link (221) is provided with an upper link limit locking surface (22114) and an upper link sliding limit surface (22113) adjacent to the upper link limit locking surface (22114), and when the switch is in the double-split position, the latch surface (282221) on the first latch member (282) or the second latch member (282') realizes the limit of the upper link (221) by matching with the upper link limit locking surface (22114) of the upper link (221) corresponding to each other; when the switch is positioned at a first power supply closing position, a limiting end surface (282222) of a lock catch rod (28222) of the first lock catch piece (282) slides onto an upper connecting rod sliding limiting surface (22113) of an upper connecting rod (221) of the first spring mechanism (22); when the switch is positioned at the second power switch-on position, the limiting end surface (282222) of the locking rod (28222) of the second locking piece (282 ') slides onto the upper connecting rod sliding limiting surface (22113) of the upper connecting rod (221) of the second spring mechanism (22').

10. A three-position double power change-over switch operating mechanism according to claim 3, characterized in that the connecting rod (24) comprises a first connecting rod (241) and a second connecting rod (242) which are respectively arranged at two sides of the switch-on and switch-off lever (223), the operating mechanism (2) further comprises a manual operating device, the manual operating device comprises a manual operating shaft hole (24121) arranged at the middle part of one connecting rod (24) and a manual operating shaft (27) with one end pivoted on the frame (21) and the other end penetrating through the manual operating shaft hole (24121).