CN211957540U

CN211957540U - Circuit breaker operating mechanism

Info

Publication number: CN211957540U
Application number: CN202021050972.9U
Authority: CN
Inventors: 王志高; 陈叶春
Original assignee: Tianyi Tongyi Electric Co ltd
Current assignee: Tianyi Tongyi Electric Co ltd
Priority date: 2020-06-10
Filing date: 2020-06-10
Publication date: 2020-11-17
Anticipated expiration: 2030-06-10

Abstract

The utility model discloses a circuit breaker operating mechanism, which comprises a case, a mechanism body, a main shaft system and a central main rod, wherein the main shaft system and the mechanism body are both positioned in the case, and the mechanism body is connected with the main shaft system through the central main rod; the mechanism body comprises a fixed plate, and a middle main rod is arranged at the front end of the fixed plate; the mechanism body drives a main shaft system to rotate through a middle main rod, and the main shaft system is used for driving the vacuum arc extinguish chamber contacts to close and open. The utility model discloses remove the back of middle part total pole by fixed plate to the front end for can install mechanism body and main shaft mechanism assembly again behind quick-witted case with mechanism body, thereby be convenient for installation and debugging maintenance.

Description

Circuit breaker operating mechanism

Technical Field

The utility model relates to a circuit breaker technical field, in particular to circuit breaker operating mechanism.

Background

The circuit breaker is the main equipment in the field of medium-high voltage power transmission and transformation, the circuit breaker operating mechanism is an important component of the circuit breaker, and the switching-on and switching-off operation of the circuit breaker is realized through the operating mechanism of the circuit breaker. The spring control mechanism has the characteristics of low cost, simple structure, long service life, basically no maintenance and the like, and is widely used on a high-voltage circuit breaker. A related art high voltage circuit breaker is shown in fig. 10 to 12, in which a case as a housing mounts and supports various parts of an operating mechanism. The energy storage system consists of an energy storage motor with a speed changer, a two-stage chain transmission, a triangular crank arm, a traction chain, a guide chain wheel, a closing spring, a limit switch S1, a driving crank arm, an energy storage shaft and a clutch crank arm. The cam transmission system consists of a cam, a transmission plate, a roller, a mandril, a main shaft, a contact pressure spring, a main crank arm, a brake separating spring and an oil buffer. The on-off brake holding and releasing device is composed of a secondary holding crank arm, a small crank arm and an on-off operating handle. The secondary control system consists of an auxiliary switch QF, a limit switch S1, a combined and separated coil HQ and a TQ.

Through manual energy storage handle operation energy storage axle, or rotate the connecting lever rotation through motor and reduction gear for the chain produces traction force, and closing spring atress compression accomplishes the energy storage process, and the energy storage is 1000 joules. After the spring stores energy, the connecting lever deviates from a dead point by a certain angle, the closing spring enables the connecting lever to continue the stroke, but the connecting lever interlocked with closing prevents the continuation of the stroke of the connecting lever. In this case, the closing interlock lever remains disabled by clockwise rotation of the knob or pulse jumping of the trip coil. The crank arm is then released, which drives the cam to cause rotation of the crank arm. The connecting rod drives the main operating shaft to rotate anticlockwise, the contact pressure spring presses downwards, the main crank arm rotates clockwise, and the insulator enables the moving contact of the conducting rod in the vacuum arc extinguishing space to move upwards, so that the circuit breaker is switched on, the auxiliary switch acts simultaneously, and the switching-on state is kept by the small crank arm. The rotation of the crank arm causes the motor and the clutch on the speed reducer to run and the contact rod of the limit switch to reverse. The limit switch can control the stored energy of the motor and indicate the state of a closing spring.

The opening spring and the contact pressure spring store energy in the closing process and are kept by the connecting lever, the opening knob is powered on through the opening coil or manually and anticlockwise rotates, the connecting lever is kept to be invalid, the connecting lever is caused to rotate against a needle, the opening spring and the contact pressure spring release energy, and the breaker is opened. In the final position close to the opening, the oil buffer starts to act to absorb the residual kinetic energy of the opening. The mechanism has high performance stability and rarely has mechanical faults. However, as shown in fig. 11, the conventional mechanism is arranged horizontally and back to front, the transmission main rod is located at the rear end, the connection with the main shaft is located at a position where the front part cannot be seen, and the main shaft and the mechanism are assembled and then integrally installed in the chassis. The main rod cannot be adjusted after being installed in the case, which brings great inconvenience to adjustment and maintenance. Meanwhile, the case is also provided with corresponding main rod avoiding holes, so that the small animals are easy to enter when the appearance is influenced and the standby state is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: a circuit breaker operating mechanism is provided to facilitate installation, debugging and maintenance.

In order to solve the technical problem, the utility model discloses a technical scheme be:

the circuit breaker operating mechanism comprises a case, a mechanism body, a main shaft system and a middle main rod, wherein the main shaft system and the mechanism body are both positioned in the case, and the mechanism body is connected with the main shaft system through the middle main rod;

the mechanism body comprises a fixed plate, and the middle main rod is arranged at the front end of the fixed plate;

the mechanism body drives the main shaft system to rotate through the middle main rod, and the main shaft system is used for driving the vacuum arc extinguish chamber contact to close and open.

Further, the mechanism body further comprises an energy storage module and an opening and closing and opening and maintaining module, and the energy storage module, the opening and closing and opening and maintaining module are all installed on the fixed plate.

Furthermore, the energy storage module comprises an energy storage shaft, a secondary transmission chain, a double-row chain wheel, a large shaft, an energy storage crank arm, an energy storage spring, a cam and an energy storage holding crank plate;

the energy storage shaft is connected with one end of the secondary transmission chain, the other end of the secondary transmission chain is meshed with the double-row chain wheel, the center of the double-row chain wheel is connected with one side of the energy storage crank arm through the large shaft, the other side of the energy storage crank arm is connected with one end of the energy storage spring, the other end of the energy storage spring is fixed on the fixed plate, the cam is sleeved with the large shaft, the energy storage retaining crank plate is arranged on a rotating path of the cam, and the energy storage retaining crank plate is clamped with the cam in an energy storage in-place state;

the energy storage spring and the secondary transmission chain are obliquely arranged, and the inclination directions of the energy storage spring and the secondary transmission chain are opposite.

Furthermore, the energy storage module also comprises a motor, a primary transmission chain wheel chain, a switch collision plate and a motor microswitch, wherein an output shaft of the motor is meshed with a gear at one end of the primary transmission chain wheel chain, and the energy storage shaft is arranged at the center of a gear at the other end of the primary transmission chain wheel chain;

the switch touch plate is arranged on a rotating path of the energy storage connecting lever, the motor microswitch is arranged on one side of the switch touch plate, which is far away from the energy storage connecting lever, and the energy storage connecting lever drives the switch touch plate to be in contact with a control part of the motor microswitch when the energy storage connecting lever is in the in-place state;

the motor microswitch is electrically connected with the motor.

Furthermore, the energy storage module also comprises a clutch system, the clutch system comprises a driving block, a pawl and a roller, the driving block is linked with the large shaft, the pawl is installed on the double-row chain wheel, and the roller is arranged on one side of the pawl;

the energy storage module is in an energy storage in-place state, and the roller acts on the pawl to separate from the driving block.

Furthermore, the switching-on/off and maintaining module comprises an energy storage maintaining crank arm, a switching-on control element, a main crank arm, a switching-on maintaining crank plate, a switching-on maintaining crank arm, a switching-off control element and a control wheel;

one end of the energy storage and maintenance crank arm is abutted against one end, far away from the cam, of the energy storage and maintenance crank plate in an energy storage in-place state, and the energy storage and maintenance crank arm is connected with the closing control piece;

the main connecting lever is arranged on the fixed plate and is positioned on a rotating path of the cam, one end of the main connecting lever is connected with one end, far away from the main shaft system, of the middle main rod, the other end of the main connecting lever is connected with one end of the closing maintaining connecting lever, the closing maintaining connecting lever is arranged on one side of the closing maintaining connecting lever, one end of the closing maintaining connecting lever is connected with the control wheel in a butting mode, and the opening control piece is connected with the control wheel;

the cam drives the main connecting lever to rotate in the rotating process, the middle main rod moves up and down along with the rotation of the main connecting lever, and the closing holding connecting lever rolls along the slope of the closing holding connecting lever along with the rotation of the main connecting lever until the closing holding connecting lever is clamped on a dead point of the closing holding connecting lever;

the control wheel drives the closing keeping crank arm to be separated from a dead point of the closing keeping crank plate.

Furthermore, the closing control part is more than one of a closing control knob and a closing electromagnet, and the opening control part is more than one of an opening control knob and an opening electromagnet.

Furthermore, the main shaft system comprises a main shaft, a connecting rod system, an insulating pull rod and a tripping spring, the middle main rod is sleeved on the main shaft, the main shaft is connected with one end of the connecting rod system, the other end of the connecting rod system is connected with one end of the insulating pull rod, and the other end of the insulating pull rod is used for being connected with a contact of the vacuum arc extinguish chamber;

the insulating pull rod is sleeved with a contact pressure spring, one end of the opening spring is fixed on the side wall of the case, and the other end of the opening spring is connected with the connecting rod system;

the main shaft drives the insulating pull rod to move up and down through the connecting rod system, and the contact pressure spring and the opening spring are in an extrusion state in the upward movement process of the insulating pull rod.

Furthermore, a combination and separation auxiliary switch is further arranged in the case, and a driving end of the combination and separation auxiliary switch is connected to the main shaft.

Furthermore, the main shaft system also comprises a switching-off flexible limiting device, and the switching-off flexible limiting device is connected with the main shaft.

The beneficial effects of the utility model reside in that: the circuit breaker operating mechanism is characterized in that the main shaft system is driven to rotate by the mechanism body through the middle main rod, the main shaft system is used for driving the vacuum arc extinguish chamber contact to close and open, the middle main rod is moved to the front end from the back of the fixed plate, the mechanism body can be installed on a case and then assembled with the main shaft mechanism, and therefore installation, debugging and maintenance are facilitated.

Drawings

Fig. 1 is an overall schematic diagram of a circuit breaker operating mechanism according to an embodiment of the present invention;

fig. 2 is an overall schematic view of the circuit breaker operating mechanism according to the embodiment of the present invention in the open state;

fig. 3 is an overall schematic view of the circuit breaker operating mechanism according to the embodiment of the present invention in a closing state;

fig. 4 is a schematic structural diagram of a mechanism body according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of an energy storage module according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a clutch system according to an embodiment of the present invention;

fig. 7 is a schematic view illustrating the energy storage module and the opening/closing/opening/holding module according to an embodiment of the present invention;

fig. 8 is a schematic view of the position of the cam and the main crank arm according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a switching and disconnecting and holding module according to an embodiment of the present invention;

FIG. 10 is a front end schematic view of a prior art mechanism body and spindle mating connection;

FIG. 11 is a schematic rear view of a prior art mating connection of a mechanism body and spindle;

fig. 12 is a schematic view showing the placement of a stored energy spring according to the prior art.

Description of reference numerals:

1. a chassis; 2. a mechanism body; 3. a spindle system; 4. a central main rod; 5. a vacuum arc-extinguishing chamber; 21. fixing a plate; 22. an energy storage module; 23. a switching on/off and maintaining module; 24. a switching auxiliary switch; 25. a flexible brake-separating limiting device; 31. a main shaft; 32. a linkage system; 33. an insulating pull rod; 34. a brake separating spring; 35. a contact pressure spring; 221. an energy storage shaft; 222. a primary drive sprocket chain; 223. a motor; 224. a secondary drive chain; 225. double-row chain wheels; 226. a large shaft; 227. an energy storage crank arm; 228. an energy storage spring; 229. a cam; 2210. an energy storage holding crutch plate; 2211. a switch touch plate; 2212. a motor microswitch; 2213. a drive block; 2214. a pawl; 2215. a roller; 231. an energy storage holding crank arm; 232. closing an electromagnet; 233. a main crank arm; 234. closing the switch to keep the crutch board; 235. a closing holding crank arm; 236. a brake-off control knob; 237. a control wheel; 238. a brake separating electromagnet.

Detailed Description

In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

Referring to fig. 1 to 9, a circuit breaker operating mechanism includes a case, a mechanism body, a main shaft system and a central main rod, wherein the main shaft system and the mechanism body are both located in the case, and the mechanism body is connected to the main shaft system through the central main rod;

From the above description, the beneficial effects of the present invention are: the mechanism body drives the main shaft system to rotate through the middle main rod, the main shaft system is used for driving the vacuum arc extinguish chamber contact to close and open, the middle main rod is moved to the front end from the back of the fixed plate, the mechanism body can be installed on the case and then assembled with the main shaft mechanism, and therefore installation, debugging and maintenance are facilitated.

From the above description, when the energy storage shaft rotates, the double-row chain wheel is driven to rotate through the secondary transmission chain so as to drive the large shaft to rotate, thereby driving the energy storage crank arm to rotate, and further stretching the energy storage spring fixed on the energy storage crank arm. At the moment, the cam is connected with the energy storage retaining crutch plate, so that the energy storage spring can keep the energy storage state. Meanwhile, a large amount of mechanism space is saved by adjusting the positions of the energy storage spring and the secondary transmission chain, so that the transverse size of the mechanism is reduced, and the mechanism can be well arranged on a compact product.

the motor microswitch is electrically connected with the motor.

From the above description, the user operates the energy storage shaft by manually operating the handle, or drives the energy storage shaft to rotate by the motor and the primary transmission chain wheel and chain. At the moment, when the energy storage spring is in an energy storage in-place state, the energy storage crank arm just drives the auxiliary switch touch plate to press the control part of the motor microswitch so as to cut off the power supply of the motor and stop the motor.

From the above description, when the stored energy is in place, the pawl is separated from the driving block under the action of the roller, so that the clutch is realized, and the motor is prevented from stopping due to the fault of the motor microswitch and further damaging the mechanism body.

From the above description, when the cam is in the energy storage position and the upper roller of the cam acts on the energy storage holding crutch plate, the component force of the cam makes the energy storage holding crutch plate have the tendency of counterclockwise rotation, but the energy storage holding crutch plate is stopped by the holding crutch arm, so that the energy storage holding is realized. When a user enables the holding crank arm to rotate anticlockwise through the closing control piece, the limitation on the energy storage holding crank plate is removed, the energy storage holding crank plate is enabled to rotate anticlockwise, and the motion of the cam is not limited any more. At the moment, the energy storage spring force releases force, the cam rotates anticlockwise under the driving of the energy storage spring to drive the main crank arm to rotate clockwise, and therefore the main rod is driven to downwards drive the main shaft to rotate to achieve closing operation. Meanwhile, the closing keeping turning plate rolls upwards along the slope surface of the closing keeping turning arm, and after the closing is in place, the main turning arm is matched and kept through the closing keeping turning plate and a dead point of the closing keeping turning arm. If the brake is required to be opened, the control wheel is rotated, so that the closing maintaining connecting lever is kept to be invalid, the main connecting lever is caused to rotate anticlockwise under the action of the opening spring and the contact pressure spring, and the breaker is opened.

As can be seen from the above description, by providing the manual control knob and the electromagnet, both the opening and closing can be controlled manually and electrically.

From the above description, the main shaft is driven by the mechanism body through the main rod to rotate, so that the insulating pull rod is driven by the connecting rod system to move up and down to realize the closing and opening of the vacuum arc extinguish chamber contacts. Meanwhile, the inner side and a contact pressure spring and a brake separating spring in the insulating pull rod realize energy storage.

From the above description, when the closing process is finished, the main shaft rotates in place to drive the closing/opening auxiliary switch to complete the electric shock switching from the normally closed state to the normally open state.

From the above description, it can be known that the mechanical vibration generated by rigid limit during opening can be avoided by providing the opening flexible limit device.

Referring to fig. 1 to 9, a first embodiment of the present invention is:

prior to the description of the present embodiment, the old mechanisms of the prior art have presented the following problems, in addition to the problems caused by the position of the central summation lever 4 described above:

1. the old mechanism is formed by combining a large number of simple stamping parts, and although the large-scale production of parts is easy. However, the number of the mechanical parts is large and the size is large. Meanwhile, the service life of the mechanism is greatly influenced by assembly tolerance and accumulated tolerance of parts.

2. Because the volume of the old mechanism is large, the case 1 is basically filled when the old mechanism is arranged in the standard 800-cabinet-width-type breaker case 1. It is not available for compact 650 cabinet wide circuit breakers.

3. The energy storage in-place clutch mechanism adopted by the old mechanism adopts a link mechanism to realize the clutch or engagement function of the power of the motor 223 in a mode that a ball drives a chain wheel to move back and forth. Although the structure is simple, the parts adopt stamping parts in large quantity. But the occupied space is large, and the clamping deformation is easy. Meanwhile, the chain wheel moves forwards and backwards, and the hidden trouble of chain falling is caused.

4. Although the design of the old mechanism meets the requirement of M2 grade mechanical life in GB 1984, the old mechanism has some obvious efforts along with the higher requirement of user units such as national power grid and the like on the service life of the circuit breaker.

5. The old mechanism energy storage spring 228 is a pressure spring, is assembled in the mechanism body 2, is connected with the mechanism through a chain and a long pull piece, occupies a large space in the mechanism, and meanwhile, the chain, the pull piece, a spring guide plate and other parts are numerous, so that the failure probability is increased. Meanwhile, because frequent friction between the pressure spring and the guide plate and other parts generates a large amount of metal scraps to enter the mechanism, the mechanical life of the mechanism is easily damaged.

Therefore, in order to solve the above problems of the old mechanism, the present embodiment provides a circuit breaker operating mechanism, which includes a case 1, a mechanism body 2, a spindle system 3 and a central main rod 4, wherein the spindle system 3 and the mechanism body 2 are both located in the case 1, and as shown in fig. 1 of the present embodiment, the spindle system 3 is horizontally disposed at the middle lower portion of the case 1, and the mechanism body 2 is loaded above. Wherein, the mechanism body 2 is connected with the main shaft system 3 through a middle main rod 4; the mechanism body 2 comprises a fixed plate 21, and a middle general rod 4 is arranged at the front end of the fixed plate 21; the mechanism body 2 and the main shaft 31 can be assembled after the mechanism body 2 is installed on the case 1, so that the installation, debugging and maintenance are convenient.

As shown in fig. 2 and 3, the main shaft system 3 includes a main shaft 31, a connecting rod system 32, an insulating pull rod 33 and a tripping spring 34, the middle main rod 4 is sleeved on the main shaft 31, the main shaft 31 is connected with one end of the connecting rod system 32, the other end of the connecting rod system 32 is connected with one end of the insulating pull rod 33, and the other end of the insulating pull rod 33 is used for being connected with a contact of the vacuum arc-extinguishing chamber 5; the insulating pull rod 33 is sleeved with a contact pressure spring 35, one end of the opening spring 34 is fixed on the side wall of the case 1, and the other end of the opening spring is connected with the connecting rod system 32; the main shaft 31 drives the insulating pull rod 33 to move up and down through the connecting rod system 32, and the contact pressure spring 35 and the opening spring 34 are in a pressing state in the upward movement process of the insulating pull rod 33. Namely, the main shaft 31 is driven by the mechanism body 2 through the main rod to rotate, so that the insulating pull rod 33 is driven by the connecting rod system 32 to move up and down to realize the closing and opening of the contacts of the vacuum arc-extinguishing chamber 5. Meanwhile, the inner side and a contact pressure spring 35 and a brake separating spring 34 in the insulating pull rod 33 realize energy storage.

As shown in fig. 4-9, the mechanism body 2 further includes an energy storage module 22, an opening/closing and maintaining module 23, an opening/closing auxiliary switch 24, and a flexible separating/closing limiting device 25, wherein the energy storage module 22, the opening/closing and maintaining module 23, the opening/closing auxiliary switch 24, and the flexible separating/closing limiting device 25 are all mounted on the fixing plate 21, a driving end of the opening/closing auxiliary switch 24 is connected to the main shaft 31, and after the closing process is completed, the main shaft 31 rotates in place to drive the opening/closing auxiliary switch 24 to complete the electric shock switching from normally closed to normally open. The opening flexible limiting device 25 is connected with the main shaft 31 to avoid mechanical vibration generated by rigid limiting during opening.

As shown in fig. 5-6, the energy storage module 22 comprises an energy storage shaft 221, a primary transmission sprocket chain 222, a motor 223, a secondary transmission chain 224, a double-row sprocket 225, a large shaft 226, an energy storage crank arm 227, an energy storage spring 228, a cam 229, an energy storage holding crank plate 2210, a switch touch plate 2211, a motor microswitch 2212, a driving block 2213, a pawl 2214 and a roller 2215; as shown in fig. 5, the output shaft of the motor 223 is engaged with the gear at one end of the primary transmission sprocket chain 222, the energy storage shaft 221 is arranged at the center of the gear at the other end of the primary transmission sprocket chain 222, the energy storage shaft 221 is connected with one end of the secondary transmission chain 224, the other end of the secondary transmission chain 224 is engaged with the double-row sprocket 225, the center of the double-row sprocket 225 is connected with one side of the energy storage crank arm 227 through the large shaft 226, the other side of the energy storage crank arm 227 is connected with one end of the energy storage spring 228, the other end of the energy storage spring 228 is fixed on the fixed plate 21, the cam 229 is sleeved with the large shaft 226, the energy storage holding crank 2210 is arranged on the rotation path of the cam 229, and in the energy storage in-place state; the switch touch plate 2211 is arranged on the rotating path of the energy storage crank arm 227, the motor microswitch 2212 is arranged on one side of the switch touch plate 2211 far away from the energy storage crank arm 227, and in the state that the energy storage is in place, the energy storage crank arm 227 drives the switch touch plate 2211 to be in contact with the control part of the motor microswitch 2212; the motor microswitch 2212 is electrically connected with the motor 223.

When a user operates the energy storage shaft 221 through a manual operation handle, or drives the energy storage shaft 221 to rotate through the motor 223 and the primary transmission chain wheel chain 222, the secondary transmission chain 224 drives the double-row chain wheel 225 to rotate, so as to drive the large shaft 226 to rotate, so as to drive the energy storage crank arm 227 to rotate, and further to stretch the energy storage spring 228 fixed on the energy storage crank arm 227. At this time, the cam 229 is engaged with the energy storage retaining plate 2210, so that the energy storage spring 228 can be kept in the energy storage state. When the energy storage spring 228 is in the energy storage in-place state, the energy storage crank arm 227 just drives the auxiliary switch touch plate 2211 to press the control part of the motor microswitch 2212 so as to cut off the power supply of the motor 223, so that the motor 223 stops working.

The energy storage spring 228, the primary transmission sprocket chain 222 and the secondary transmission chain 224 are all obliquely arranged, the energy storage spring 228 and the primary transmission sprocket chain 222 are in the same oblique direction, and the oblique directions of the secondary transmission chain 224, the energy storage spring 228 and the primary transmission sprocket chain 222 are opposite. Therefore, a large amount of mechanism space is saved, the transverse size of the mechanism is reduced, and the mechanism can be well installed on a compact product.

As shown in fig. 6, a clutch system is composed of a driving block 2213, a pawl 2214 and a roller 2215, wherein the driving block 2213 is linked with the large shaft 226, the pawl 2214 is installed on the double-row chain wheel 225, and the roller 2215 is arranged at one side of the pawl 2214; when the stored energy is in place, the pawl 2214 is separated from the driving block 2213 under the action of the roller 2215, so that the clutch is realized, and the motor 223 cannot stop due to the fault of the motor microswitch 2212, and further damage to the mechanism body 2 is prevented.

As shown in fig. 7 to 9, the switching on/off and holding module 23 includes an energy storage holding lever 231, a switching on control member, a main lever 233, a switching on holding lever 234, a switching on holding lever 235, a switching off control member, and a control wheel 237; one end of the energy storage and holding crank arm 231 is abutted against one end of the energy storage and holding crank plate 2210 far away from the cam 229 in an energy storage in-place state, and the energy storage and holding crank arm 231 is connected with a closing control piece; the main crank arm 233 is arranged on the fixed plate 21 and located on a rotating path of the cam 229, one end of the main crank arm 233 is connected with one end of the middle main rod 4 far away from the main shaft system 3, the other end of the main crank arm 233 is connected with one end of the closing maintaining crank 234, the closing maintaining crank arm 235 is arranged on one side of the closing maintaining crank 234, one end of the closing maintaining crank arm 235 is connected with the control wheel 237 in an abutting mode, and the opening control element is connected with the control wheel 237; the cam 229 drives the main crank arm 233 to rotate in the rotating process, the middle main rod 4 moves up and down along with the rotation of the main crank arm 233, and the closing holding crank plate 234 rolls along the slope of the closing holding crank arm 235 along with the rotation of the main crank arm 233 until being clamped on the dead point of the closing holding crank arm 235; the control wheel 237 drives the closing holding lever 235 to disengage from the dead point of the closing holding lever 234.

Thus, as shown in fig. 7, when the cam 229 is in the stored energy position and the roller 2215 acts on the energy storage retaining arm 2210, the component force thereof causes the energy storage retaining arm 2210 to have a tendency to rotate counterclockwise, but is stopped by the retaining arm, thereby achieving stored energy retention. When the user rotates the energy storage holding crank arm 231 counterclockwise by the closing control member, the energy storage holding crank plate 2210 is released from being restricted to rotate counterclockwise, and the movement of the cam 229 is not restricted any more. At this time, the force of the energy storage spring 228 is released, and as shown in fig. 8, the cam 229 is driven by the energy storage spring 228 to rotate counterclockwise, so as to drive the main crank arm 233 to rotate clockwise, thereby driving the main lever to rotate the main shaft 31 downward, and realizing the closing operation. Meanwhile, the closing holding lever 234 rolls upward along the slope of the closing holding lever 235, and after the closing is in place, the main lever 233 is held by the engagement of the closing holding lever 234 and the dead point of the closing holding lever 235. If the switch is required to be opened, the control wheel 237 is rotated, so that the switch-on maintaining crank arm 235 is kept disabled, and the main crank arm 233 is caused to rotate counterclockwise under the action of the switch-off spring 34 and the contact pressure spring 35, so that the circuit breaker is opened.

In this embodiment, the closing control component includes a closing control knob and a closing electromagnet 232, and the opening control component includes an opening control knob 236 and an opening electromagnet 238, so that both opening and closing can be controlled manually and electrically, and in other embodiments, a single manual control or a single electric control can be considered.

To sum up, the utility model provides a circuit breaker operating mechanism, move the middle part total pole from the back of fixed plate to the front end, make can install mechanism body and main shaft mechanism assembly after the machine case, thus facilitate the installation, debugging and maintenance; by adjusting the position of the energy storage module, a large amount of mechanism space is saved, so that the transverse size of the mechanism is reduced, and the mechanism can be well installed on a compact product; meanwhile, the mechanism body and the main shaft system are further structurally improved, so that the mechanical strength of main transmission parts is enhanced, and the mechanical service life is greatly prolonged; the number of parts and the purchasing difficulty are reduced, and the production cost is saved; and the process difficulty in the production and assembly process is simplified.

The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.

Claims

1. Breaker operating device, including quick-witted case, mechanism body, main shaft system and middle part total pole, its characterized in that: the main shaft system and the mechanism body are both positioned in the case, and the mechanism body is connected with the main shaft system through a middle main rod;

2. The circuit breaker operating mechanism of claim 1 wherein: the mechanism body further comprises an energy storage module and a switching-on/off and holding module, and the energy storage module, the switching-on/off and holding module are all installed on the fixed plate.

3. The circuit breaker operating mechanism of claim 2 wherein: the energy storage module comprises an energy storage shaft, a secondary transmission chain, a double-row chain wheel, a large shaft, an energy storage crank arm, an energy storage spring, a cam and an energy storage holding crank plate;

4. The circuit breaker operating mechanism of claim 3 wherein: the energy storage module also comprises a motor, a primary transmission chain wheel chain, a switch collision plate and a motor microswitch, wherein an output shaft of the motor is meshed with a gear at one end of the primary transmission chain wheel chain, and the energy storage shaft is arranged at the center of a gear at the other end of the primary transmission chain wheel chain;

the motor microswitch is electrically connected with the motor.

5. The circuit breaker operating mechanism of claim 3 wherein: the energy storage module further comprises a clutch system, the clutch system comprises a driving block, a pawl and a roller, the driving block is linked with the large shaft, the pawl is mounted on the double-row chain wheel, and the roller is arranged on one side of the pawl;

6. The circuit breaker operating mechanism of claim 3 wherein: the switching-on/off and maintaining module comprises an energy storage maintaining connecting lever, a switching-on control part, a main connecting lever, a switching-on maintaining connecting lever, a switching-off control part and a control wheel;

7. The circuit breaker operating mechanism of claim 6 wherein: the switching-on control part is more than one of a switching-on control knob and a switching-on electromagnet, and the switching-off control part is more than one of a switching-off control knob and a switching-off electromagnet.

8. The circuit breaker operating mechanism of claim 1 wherein: the main shaft system comprises a main shaft, a connecting rod system, an insulating pull rod and a tripping spring, the middle main rod is sleeved on the main shaft, the main shaft is connected with one end of the connecting rod system, the other end of the connecting rod system is connected with one end of the insulating pull rod, and the other end of the insulating pull rod is used for being connected with a contact of the vacuum arc extinguish chamber;

9. The circuit breaker operating mechanism of claim 8 wherein: and a combination and separation auxiliary switch is also arranged in the case, and the driving end of the combination and separation auxiliary switch is connected to the main shaft.

10. The circuit breaker operating mechanism of claim 8 wherein: the main shaft system further comprises a brake separating flexible limiting device, and the brake separating flexible limiting device is connected with the main shaft.