CN107910235B - Energy storage operating mechanism of circuit breaker - Google Patents
Energy storage operating mechanism of circuit breaker Download PDFInfo
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- CN107910235B CN107910235B CN201711396748.8A CN201711396748A CN107910235B CN 107910235 B CN107910235 B CN 107910235B CN 201711396748 A CN201711396748 A CN 201711396748A CN 107910235 B CN107910235 B CN 107910235B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/42—Induction-motor, induced-current, or electrodynamic release mechanisms
- H01H71/43—Electrodynamic release mechanisms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/66—Power reset mechanisms
- H01H71/68—Power reset mechanisms actuated by electromagnet
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- Electromagnetism (AREA)
- Breakers (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention relates to an energy storage operating mechanism of a circuit breaker, when the circuit breaker needs to be switched off, a driving device drives an energy storage gear set to enable a shifting roller to shift a crank arm mechanism to rotate towards the right; the crank arm mechanism rotates towards the right direction to enable the energy storage torsion spring to be tightened to store energy, and meanwhile, the contact device is switched off. The clamping pin connected to the right side of the crank arm mechanism is clamped into a clamping opening in a clamping block in the tripping mechanism when the crank arm mechanism rotates rightwards, meanwhile, the clamping jaw at the upper end of the clamping block rotates to the left side of the first rotating shaft through the clamping groove in the first rotating shaft, and the first rotating shaft blocks the clamping jaw to prevent the clamping block from rotating, so that the energy storage torsion spring is enabled to keep an energy storage state locking state. When the breaker needs to be switched on, the electromagnet drives the tripping crank arm to rotate so that the clamping jaw can pass through the clamping groove, the lower end of the clamping block rotates leftwards so that the clamping pin can be separated from the clamping opening, and the crank arm mechanism rotates leftwards so as to drive the contact device of the breaker to be switched on under the torsion action of the energy storage torsion spring.
Description
Technical Field
The invention relates to an energy storage operating mechanism of a molded case circuit breaker, and belongs to the technical field of low-voltage switch accessories.
Background
At present, the time for switching on or switching off the non-energy storage type electric operating mechanism which is driven by a common motor to directly operate the molded case circuit breaker is about 1 second approximately, the time is long, and the situation that the molded case circuit breaker is required to be rapidly switched on after a switching-on instruction is received cannot be met, so that the energy storage electric operating device is required to be used for assisting in switching on or switching off, and the time is shortened to be within 100 milliseconds.
The control mechanism, namely the electric operating mechanism, is an accessory used for a remote automatic opening and closing circuit breaker, and the control mechanism is connected with the circuit breaker and can realize the remote electric opening and closing of the circuit breaker; the control mechanism comprises a motor control mechanism and an electromagnet control mechanism; the electric operating mechanism is a core component of the circuit breaker, and the reliability of the operating mechanism directly determines the reliability of the circuit breaker; the pre-stored energy operating mechanism of the circuit breaker is an important component of the circuit breaker operating mechanism, and the pre-stored energy operating mechanism mainly provides enough energy for the circuit breaker when the circuit breaker is switched on.
Thereby the most energy storage operating device uses at present comes compression spring to realize energy storage in advance through the cam, then release energy uses when closing a floodgate for the circuit breaker, and the energy storage operating device in advance of structure like this, bulky, the structure is complicated, and the reaction rate is slow and be not convenient for assemble the maintenance, and is with high costs. Therefore, there is a need to develop a pre-stored energy electric operating mechanism which is convenient to assemble, convenient to assemble and maintain, low in production cost, small in size, high in reaction speed and high in linkage.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide an energy storage operation mechanism for a circuit breaker, which can be used for opening and closing operations of the circuit breaker, and which has a reliable operation and a simple structure.
In order to achieve the purpose, the invention provides an energy storage operating mechanism of a circuit breaker, which adopts the following technical scheme: an energy storage operating mechanism of a circuit breaker comprising the following parts:
the crank arm mechanism is in transmission connection with a contact device of the circuit breaker, an energy storage torsion spring is connected to the crank arm mechanism, and the crank arm mechanism rotates towards right rotation to tighten the energy storage torsion spring and enable the contact device to be switched off; the crank arm mechanism rotates towards left to release the energy storage torsion spring and enable the contact device to be switched on, and the right side of the crank arm mechanism is connected with a clamping pin;
the energy storage gear set is provided with a shifting roller, and the driving device drives the energy storage gear set to enable the shifting roller to shift the crank arm mechanism to rotate towards the right;
the tripping mechanism comprises a clamping block and a first rotating shaft which are positioned on the right side of the crank arm mechanism, wherein the lower end of the clamping block is provided with a clamping opening for clamping the clamping pin, the upper end of the clamping block is provided with a clamping jaw, the first rotating shaft is provided with a clamping groove, and the first rotating shaft is sleeved with a first reset torsion spring;
when the crank arm mechanism rotates towards the right, the clamping pin is clamped into the clamping opening and pushes the lower end of the clamping block to rotate towards the right, and the clamping jaw rotates towards the left to enter the clamping opening and push the first rotating shaft to rotate; when the clamping jaw rotates to the left side of the first rotating shaft, the first reset torsion spring twists the first rotating shaft to reset so as to block the clamping jaw;
the first rotating shaft is also connected with a tripping crank arm which can be driven by an electromagnet to rotate so as to enable the clamping jaw to pass through the clamping groove and rotate rightwards.
Preferably, the fixture block is connected to the second rotating shaft, the second rotating shaft is sleeved with a second reset torsion spring, the upper end of the fixture block is further provided with a limiting claw, and the second reset torsion spring tightly twists the second rotating shaft to enable the limiting claw to abut against the left side of the first rotating shaft.
Preferably, still include the frame, have preceding curb plate, posterior lateral plate and roof, crank mechanism, energy storage gear group and tripping device are located the roof below and locate between preceding curb plate and the posterior lateral plate.
More preferably, the crank arm mechanism comprises a left crank arm group and a right crank arm group which are parallel to each other and have the same length, and the lower end of the left crank arm group is connected with the lower end of the right crank arm group through a connecting rod extending leftwards and rightwards; the upper end of the left crank arm group is hinged on the left connecting shaft, the upper end of the right crank arm group is hinged on the right connecting shaft, and the left connecting shaft and the right connecting shaft are arranged between the front side plate and the rear side plate in parallel; the energy storage torsion spring is sleeved on the left connecting shaft, one leading-out end of the energy storage torsion spring extends horizontally and is pressed by the top plate, and the other leading-out end of the energy storage torsion spring extends downwards and is clamped by the left crank arm group; the bayonet lock is connected to the right side of the right crank arm group.
Furthermore, the left crank arm group comprises a first front crank arm and a first rear crank arm which are parallel to each other and have the same length, and the upper end of the first front crank arm and the upper end of the first rear crank arm are hinged to the left connecting shaft; the lower end of the first front crank arm and the lower end of the first rear crank arm are connected together through a first swinging rod extending forwards and backwards; the right crank arm group comprises a second front crank arm and a second rear crank arm which are parallel to each other and have the same length, and the upper end of the second front crank arm and the upper end of the second rear crank arm are hinged to the right connecting shaft; the lower end of the second front crank arm and the lower end of the second rear crank arm are connected together through a second swinging rod extending forwards and backwards; the circuit breaker is provided with an operating handle in transmission connection with the contact device, and the upper end of the operating handle is clamped between the first swing rod and the second swing rod.
Furthermore, the energy storage gear set comprises a front side gear and a rear side gear which are coaxially arranged and driven by the driving device to synchronously rotate, the rear side surface of the front side gear and the front side surface of the rear side gear are respectively provided with a shifting roller, and the synchronous rotation of the front side gear and the rear side gear can enable the two shifting rollers to respectively abut against the left side surface of the second front crank arm and the left side surface of the second rear crank arm to shift the right crank arm group to rotate towards the right.
Furthermore, a strip-shaped sliding block which is matched with the gear shifting roller in a rolling mode is arranged on each of the second front crank arm and the second rear crank arm.
More preferably, the driving device comprises a front transmission gear and a rear transmission gear which are coaxially fixed on a third rotating shaft, the third rotating shaft is driven by a driving motor to rotate, the third rotating shaft is connected with a front rotating frame and a rear rotating frame, the right end of the front rotating frame and the right end of the rear rotating frame are hinged on the third rotating shaft, the left ends of the front rotating frame and the rear rotating frame are respectively connected with a front floating gear and a rear floating gear, and the front floating gear and the rear floating gear are respectively meshed with the front transmission gear and the rear transmission gear; a third reset torsion spring is sleeved on the third rotating shaft and respectively presses the front rotating frame and the rear rotating frame against the front side gear and the rear side gear, so that the front floating gear and the rear floating gear are respectively pressed on the front side gear and the rear side gear, and the front floating gear and the rear floating gear are respectively meshed with the front side gear and the rear side gear; the front side gear and the rear side gear are provided with tooth-lacking sections with the same length at the same position on the outer edge.
More preferably, a fourth rotating shaft is arranged between the front side plate and the rear side plate, and a front synchronizing gear and a rear synchronizing gear are coaxially fixed on the fourth rotating shaft; a front auxiliary gear is coaxially fixed on the side surface of the front side gear, and a rear auxiliary gear is coaxially fixed on the side surface of the rear side gear; the front synchronizing gear is meshed with the front auxiliary gear, and the rear synchronizing gear is meshed with the rear auxiliary gear.
Preferably, the lower end of the fixture block is provided with a left clamping portion and a right clamping portion, the length of the left clamping portion is smaller than that of the right clamping portion, and the clamping opening is formed between the left clamping portion and the right clamping portion; when the right crank arm group rotates towards the right, the clamping pin is abutted against the right clamping part to push the lower end of the clamping block to rotate towards the right, so that the clamping pin is clamped into the clamping opening.
As described above, the stored energy operating mechanism of the circuit breaker according to the present invention has the following advantages: in the stored energy operating mechanism of a circuit breaker of the present invention,
1. when the breaker needs to be opened, the driving device drives the energy storage gear set to enable the shifting roller to shift the crank arm mechanism to rotate towards the right; the crank arm mechanism rotates towards the right direction to enable the energy storage torsion spring to be tightened to store energy, and meanwhile, the contact device is switched off.
2. The clamping pin connected to the right side of the crank arm mechanism is clamped into the clamping opening in the clamping block in the tripping mechanism when the crank arm mechanism rotates rightwards, meanwhile, the clamping jaw at the upper end of the clamping block rotates to the left side of the first rotating shaft through the clamping groove in the first rotating shaft, the first rotating shaft blocks the clamping jaw to prevent the clamping block from rotating, and therefore the clamping block in the tripping mechanism is clamped by the clamping pin, so that the crank arm mechanism cannot rotate leftwards, the energy storage torsion spring is enabled to keep an energy storage state, and the energy storage torsion spring is in a locking state.
3. When the breaker needs to be switched on, the electromagnet drives the tripping crank arm to rotate so that the clamping jaw can pass through the clamping groove, the lower end of the clamping block rotates leftwards so that the clamping pin can be separated from the clamping opening, and the crank arm mechanism rotates leftwards so as to drive the contact device of the breaker to be switched on under the torsion action of the energy storage torsion spring.
Therefore, the energy storage operating mechanism of the circuit breaker can be used for the rapid switching-on operation and the switching-off operation of the molded case circuit breaker, and is reliable in action and simple in structure.
Drawings
Fig. 1 is a schematic diagram of the energy storage operating mechanism of a circuit breaker according to the present invention, with an exploded view of the housing;
fig. 2 is a schematic diagram of the energy storage operating mechanism of a circuit breaker according to the present invention with a frame partially removed; (the front side gear, the front floating gear and the rear floating gear are simplified into a disk shape, and the gear teeth on the outer edge are not shown)
FIG. 3 is a schematic view showing the connection of an energy storage gear set and a driving device (only the structures of the front rotating frame, the rear rotating frame and the third rotating shaft portion are shown; the front side gear, the front transmission gear, the rear transmission gear, the front floating gear and the rear floating gear are simplified into a disk shape, and the gear teeth on the outer edge are not shown);
FIG. 4 is a front view of the crank arm mechanism
FIG. 5 is a perspective view of the crank arm mechanism;
fig. 6 is a front view of the trip mechanism;
fig. 7 is a schematic perspective view of the trip mechanism;
description of the element reference numerals
1 crank arm mechanism 29 right connecting shaft
2 energy storage torsion spring 30 first front crank arm
3 Bayonet 31 first rear crank arm
4 first oscillating lever of energy storage gear set 32
5 second front crank arm of shifting roller 33
6 second rear crank arm of driving device 34
7 tripping mechanism 35 second swinging rod
8 operating handle of clamping block 36
9 left clamping part 37 front side gear
10 right clamping part 38 rear side gear
11-bayonet 39-bar-shaped sliding block
12 jaw 40 third shaft
13 front transmission gear of first rotating shaft 41
14-clamping groove 42 rear transmission gear
15 first reset torsion spring 43 front rotating frame
16 trip crank arm 44 rear rotating frame
17 electromagnet 45 front floating gear
18 second shaft 46 rear floating gear
19 second restoring torsion spring 47 third restoring torsion spring
20 limiting claw 48 tooth-missing section
21 rack 49 fourth rotating shaft
22 front side plate 50 front idler gear
23 rear side plate 51 rear synchronizing gear
24 front auxiliary gear of top plate 52
25 left crank arm set 53 rear auxiliary gear
26 right crank arm set 54 driving motor
27 connecting rod 55 stop pin
28 left connecting shaft
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
As shown in fig. 1 to 7, the present invention provides an energy storage operating mechanism of a circuit breaker, including the following parts:
the connecting lever mechanism 1 is in transmission connection with a contact device of the circuit breaker (please refer to fig. 4, the connecting lever mechanism 1 is in transmission connection with the contact device through an operating handle 36), please refer to fig. 1, fig. 2, fig. 4 and fig. 5 in combination, the connecting lever mechanism 1 is connected with an energy storage torsion spring 2, and the connecting lever mechanism 1 rotates towards the right to tighten the energy storage torsion spring 2 and enable the contact device to be switched off; the crank arm mechanism 1 rotates towards the left to release the energy storage torsion spring 2 and enable the contact device to be switched on, and the right side of the crank arm mechanism 1 is connected with a bayonet 3;
referring to fig. 2 and 3, the energy storage gear set 4 has a shift roller 5, and the driving device 6 drives the energy storage gear set 4 to make the shift roller 5 shift the crank arm mechanism 1 to rotate to the right;
referring to fig. 2, 6 and 7, the trip mechanism 7 includes a clamping block 8 and a first rotating shaft 13, the clamping block 8 is located on the right side of the crank arm mechanism 1, the lower end of the clamping block 8 is provided with a bayonet 11 for clamping the clamping pin 3, the upper end of the clamping block 8 is provided with a clamping jaw 12, the first rotating shaft 13 is provided with a clamping groove 14, and the first rotating shaft 13 is sleeved with a first reset torsion spring 15;
referring to fig. 2, fig. 6 and fig. 7 in combination, when the crank arm mechanism 1 rotates towards the right, the latch 3 is clamped into the bayonet 11 and pushes the lower end of the latch 8 to rotate towards the right, and the latch 12 rotates towards the left at the same time and enters the bayonet 14 and pushes the first rotating shaft 13 to rotate; when the claw 12 rotates to the left side of the first rotating shaft 13, the first reset torsion spring 15 twists the first rotating shaft 13 to reset so as to block the claw 12;
referring to fig. 2, 6 and 7, a trip lever 16 is further connected to the first rotating shaft 13, and the trip lever 16 is driven by an electromagnet 17 to rotate so as to enable the jaws 12 to pass through the slots 14 and rotate to the right.
In the energy storage operating mechanism of the circuit breaker, 1, when the circuit breaker needs to be switched off, the driving device 6 drives the energy storage gear set 4 to enable the shifting roller 5 to shift the crank arm mechanism 1 to rotate towards the right; the crank arm mechanism 1 rotates towards the right direction to enable the energy storage torsion spring 2 to be twisted to store energy, and meanwhile, the contact device is switched off. 2. The bayonet pin 3 connected to the right side of the crank arm mechanism 1 is clamped into the bayonet on the clamping block 8 in the tripping mechanism 7 when the crank arm mechanism 1 rotates rightwards, meanwhile, the clamping jaw 12 at the upper end of the clamping block 8 rotates to the left side of the first rotating shaft 13 through the clamping groove 14 in the first rotating shaft 13, the first rotating shaft 13 blocks the clamping jaw 12 to prevent the clamping block 8 from rotating, and therefore the clamping block 8 in the tripping mechanism 7 is clamped with the bayonet pin 3 to prevent the crank arm mechanism 1 from rotating leftwards, so that the energy storage torsion spring 2 is enabled to keep an energy storage state, which is a locking state. 3. When the breaker needs to be switched on, the electromagnet 17 drives the tripping crank arm 16 to rotate, so that the clamping jaw 12 can pass through the clamping groove 14, the lower end of the clamping block 8 rotates towards the left side, so that the clamping pin 3 can be separated from the clamping groove 11, and under the torsion action of the energy storage torsion spring 2, the crank arm mechanism 1 rotates towards the left side to drive the contact device of the breaker to be switched on. Therefore, the energy storage operating mechanism of the circuit breaker can be used for the rapid switching-on and switching-off operation of the molded case circuit breaker, and is reliable in action and simple in structure.
In the energy storage operating mechanism of the circuit breaker of the present invention, the fixture block 8 is used for clamping or releasing the latch 3 of the crank arm mechanism 1, as shown in fig. 2, fig. 6 and fig. 7, as a preferred embodiment, the fixture block 8 is connected to the second rotating shaft 18, the second rotating shaft 18 is sleeved with the second return torsion spring 19, the upper end of the fixture block 8 is further provided with a limiting claw 20, and when the latch is located on the right side of the first rotating shaft, the second return torsion spring 19 tightens the second rotating shaft 18 so that the limiting claw 20 abuts against the left side of the first rotating shaft 13.
In a preferred embodiment of the energy storage operating mechanism of the circuit breaker of the present invention, as shown in fig. 1, the energy storage operating mechanism further includes a frame 21, the frame 21 has a front side plate 22, a rear side plate 23 and a top plate 24, and the crank mechanism 1, the energy storage gear set 4 and the trip mechanism 7 are located below the top plate 24 and are disposed between the front side plate 22 and the rear side plate 23. The front side plate 22 and the rear side plate 23 provide a mounting base for rotating parts in the energy storage operating mechanism, and the top plate 24 is used for pressing one leading-out end of the energy storage torsion spring 2. The crank arm mechanism 1 is in transmission connection with a contact device of the circuit breaker, and under the driving of the energy storage gear set 4, the crank arm mechanism 1 stores energy for the energy storage torsion spring 2 and drives the contact device to open; when the energy storage torsion spring 2 releases energy, the energy storage torsion spring 2 drives the crank arm mechanism 1 to rotate so as to close the contact device. As a preferred embodiment, as shown in fig. 4 and 5, the crank arm mechanism 1 includes a left crank arm group 25 and a right crank arm group 26 which are parallel to each other and have the same length, and the lower end of the left crank arm group 25 and the lower end of the right crank arm group 26 are connected by a link 27 extending left and right; the upper end of the left crank arm group 25 is hinged on a left connecting shaft 28, the upper end of the right crank arm group 26 is hinged on a right connecting shaft 29, and the left connecting shaft 28 and the right connecting shaft 29 are arranged between the front side plate 22 and the rear side plate 23 in parallel; the energy storage torsion spring 2 is sleeved on the left connecting shaft 28, one leading-out end of the energy storage torsion spring 2 extends horizontally and is pressed by the top plate 24 (please refer to fig. 1), and the other leading-out end of the energy storage torsion spring 2 extends downwards and is clamped by the left crank arm group 25 (as shown in fig. 4 and 5, the other leading-out end of the energy storage torsion spring 2 is respectively blocked by the stop pin 55); bayonet 3 is attached to the right side of right set of bell arms 26.
In the energy storage operating mechanism of the circuit breaker of the present invention, the crank arm mechanism 1 is in transmission connection with a contact device of the circuit breaker, so as to drive the contact device to close or open, please refer to fig. 4 and 5, as a preferred embodiment, the left crank arm group 25 includes a first front crank arm 30 and a first rear crank arm 31 which are parallel to each other and have equal length, and the upper end of the first front crank arm 30 and the upper end of the first rear crank arm 31 are hinged on the left connecting shaft 28; the lower end of the first front crank arm 30 and the lower end of the first rear crank arm 31 are connected together by a first swing lever 32 extending forward and backward; the right crank arm group 26 comprises a second front crank arm 33 and a second rear crank arm 34 which are parallel to each other and have the same length, and the upper end of the second front crank arm 33 and the upper end of the second rear crank arm 34 are hinged on the right connecting shaft 29; the lower end of the second front crank arm 33 and the lower end of the second rear crank arm 34 are connected together by a second swing lever 35 extending forward and backward; the circuit breaker has an operating handle 36 in transmission connection with the contact device, the circuit breaker is installed below the energy storage operating mechanism, please refer to fig. 4, the upper end of the operating handle 36 of the circuit breaker is clamped between the first swing rod 32 and the second swing rod 35, when the crank mechanism 1 rotates rightwards, the first swing rod 32 pushes the upper end of the operating handle 36 to rotate rightwards to open the circuit breaker, and when the crank mechanism 1 rotates leftwards, the second swing rod 35 pushes the upper end of the operating handle 36 to rotate leftwards to close the circuit breaker.
In the energy storage operating mechanism of the circuit breaker of the present invention, the energy storage gear set 4 drives the crank arm mechanism 1 to rotate, as a preferred embodiment, as shown in fig. 3, the energy storage gear set 4 includes a front side gear 37 and a rear side gear 38 which are coaxially disposed and driven by the driving device 6 to rotate synchronously, a shift roller 5 is respectively disposed on a rear side of the front side gear 37 and a front side of the rear side gear 38, please refer to fig. 3 and 4, the synchronous rotation of the front side gear 37 and the rear side gear 38 can make the two shift rollers 5 respectively abut against a left side of the second front crank arm 33 and a left side of the second rear crank arm 34 to shift the right crank arm set 26 to rotate to the right. In a preferred embodiment, as shown in fig. 5, a strip-shaped sliding block 39 in rolling fit with the dial roller 5 is respectively arranged on the second front crank arm 33 and the second rear crank arm 34. Therefore, when the energy storage gear set 4 drives the crank arm mechanism 1, rolling friction exists between the shifting roller 5 and the strip-shaped sliding block 39, the friction coefficient is small, clamping stagnation is not easy to occur, and abrasion is small.
1. In the energy storage operating mechanism of a circuit breaker of the present invention, the driving device 6 is used for driving the energy storage gear set 4 to rotate, as shown in fig. 2 and 3, the driving device 6 includes a front transmission gear 41 and a rear transmission gear 42 coaxially fixed on a third rotating shaft 40, the third rotating shaft 40 is driven to rotate by a driving motor 54, a front rotating frame 43 and a rear rotating frame 44 are connected to the third rotating shaft 40, a right end of the front rotating frame 43 and a right end of the rear rotating frame 44 are hinged on the third rotating shaft 40, a left end of the front rotating frame 43 and a left end of the rear rotating frame 44 are respectively connected with a front floating gear 45 and a rear floating gear 46, and the front floating gear 45 and the rear floating gear 46 are respectively engaged with the front transmission gear 41 and the rear transmission gear 42; a third reset torsion spring 47 is sleeved on the third rotating shaft 40, the third reset torsion spring 47 presses the front rotating frame 43 and the rear rotating frame 44 against the front side gear 37 and the rear side gear 38 respectively, so that the front floating gear 45 and the rear floating gear 46 are pressed on the front side gear 37 and the rear side gear 38 respectively, and the front floating gear 45 and the rear floating gear 46 are meshed with the front side gear 37 and the rear side gear 38 respectively; the front side gear 37 and the rear side gear 38 are provided with the same length of the missing tooth sections 48 at the same position on the outer edge. When the crank arm mechanism 1 rotates rightwards to enable the energy storage torsion spring 2 to store energy in place, the front floating gear 45 and the rear floating gear 46 are respectively contacted with the tooth missing sections 48 on the front side gear 37 and the rear side gear 38 and are disengaged, even if the front floating gear 45 and the rear floating gear 46 continue to rotate, the front side gear 37 and the rear side gear 38 can not rotate any more, and therefore the driving device 6 can be prevented from driving the front side gear 37 and the rear side gear 38 to rotate too much to exceed a preset position when the driving device continues to rotate due to inertia. In order to enable the front side gear 37 and the rear side gear 38 to synchronously rotate, so as to ensure that the front side gear 37 and the rear side gear 38 are uniformly stressed to drive the crank arm mechanism 1, as a preferred embodiment, as shown in fig. 2 and 3, a fourth rotating shaft 49 is arranged between the front side plate 22 and the rear side plate 23, and a front synchronizing gear 50 and a rear synchronizing gear 51 are coaxially fixed on the fourth rotating shaft 49; a front auxiliary gear 52 is coaxially fixed on the side surface of the front side gear 37, and a rear auxiliary gear 53 is coaxially fixed on the side surface of the rear side gear 38; the front synchronizing gear 50 is engaged with a front auxiliary gear 52, and the rear synchronizing gear 51 is engaged with a rear auxiliary gear 53. Thus, the front synchronizing gear 50 and the rear synchronizing gear 51 can ensure that the front auxiliary gear 52 and the rear auxiliary gear 53 rotate in synchronization, thereby ensuring that the front side gear 37 and the rear side gear 38 rotate in synchronization.
In the energy storage operating mechanism of the circuit breaker, the fixture block 8 is used for clamping the clamp pin 3 on the crank arm mechanism 1 when the crank arm mechanism 1 rotates towards the right, as a preferred embodiment, as shown in fig. 6, the lower end of the fixture block 8 is provided with a left clamping portion 9 and a right clamping portion 10, the length of the left clamping portion 9 is smaller than that of the right clamping portion 10, and the clamping opening 11 is formed between the left clamping portion 9 and the right clamping portion 10; when the right crank arm group 26 rotates towards the right, the bayonet pin 3 abuts against the right clamping part 10 to push the lower end of the clamping block 8 to rotate towards the right, so that the bayonet pin 3 is clamped into the bayonet 11.
The operation of the stored energy operating mechanism of a circuit breaker according to the present invention will now be described with reference to fig. 1 and 7.
The brake separating and energy storing process: referring to fig. 2 and 3, the third return torsion spring 47 twists the third rotating shaft 40 to make the front rotating frame 43 and the rear rotating frame 44 connected to the third rotating shaft 40 press the front side gear 37 and the rear side gear 38, respectively, the front floating gear 45 and the rear floating gear 46 are engaged with the front side gear 37 and the rear side gear 38, respectively, the driving device 6 drives the front floating gear 45 and the rear floating gear 46 to rotate clockwise to drive the front side gear 37 and the rear side gear 38 to rotate counterclockwise synchronously, and the shift rollers 5 on the front side gear 37 and the rear side gear 38 abut against the lower part of the crank arm mechanism 1 to shift the crank arm mechanism 1 to the right; referring to fig. 4, the crank arm mechanism 1 rotates to the right to drive the operating handle 36 to rotate to the right, so as to open the contact device of the circuit breaker, and simultaneously, the energy storage torsion spring 2 is tightened to store energy in the energy storage torsion spring 2.
The locking process: referring to fig. 2, 6 and 7, when the crank arm mechanism 1 rotates to the right, the bayonet pin 3 connected to the right side of the crank arm mechanism 1 is clamped into the bayonet 11 of the clamping block 8 connected to the second rotating shaft 18, and the right clamping portion 10 of the clamping block 8 is pushed to rotate to the right, so that the bayonet of the clamping block 8 gradually turns to the direction to the right, and the left clamping portion 9 of the clamping block 8 blocks the bayonet pin 3, so that the bayonet pin 3 cannot be disengaged from the bayonet 11; when the lower end of the clamping block 8 rotates rightwards, the upper end of the clamping block 8 rotates leftwards, the clamping jaw 12 at the upper end of the clamping block 8 rotates leftwards and enters the clamping groove 14 in the first rotating shaft 13, the clamping jaw 12 abuts against the bottom of the clamping groove 14 to rotate the first rotating shaft 13, so that the clamping groove 14 rotates downwards to enable the clamping jaw 12 to rotate to the left side of the first rotating shaft 13, after the clamping jaw 12 rotates to the left side of the first rotating shaft 13, the first reset torsion spring 15 on the first rotating shaft 13 twists the first rotating shaft 13 to reset to enable the clamping groove 14 to rotate rightwards, the clamping jaw 12 cannot rotate rightwards through the clamping groove 14, the clamping jaw 12 is blocked by the first rotating shaft 13 at the moment, the clamping block 8 cannot rotate, the clamping pin 3 is clamped in the clamping opening 11 of the clamping block 8, therefore, the crank arm mechanism 1 cannot rotate leftwards, and the energy storage torsion spring 2 keeps. This is the locking process.
Tripping and closing processes: referring to fig. 6 and 7, the electromagnet 17 moves downward to drive the trip crank arm 16 to rotate, the trip crank arm 16 drives the first rotating shaft 13 to rotate, so that the opening of the clamping groove 14 rotates to a downward direction, the clamping jaw 12 can move through the clamping groove 14 to rotate to the right side of the first rotating shaft 13, the lower end of the clamping block 8 rotates to the left under the action of the energy storage torsion spring 2, the clamping pin 3 is disengaged from the bayonet 11 of the clamping block 8, and thus the clamping block 8 is unlocked and tripped; the energy storage torsion spring 2 releases energy, referring to fig. 4, the crank arm mechanism 1 rotates to the left under the torsion of the energy storage torsion spring 2, so as to rotate the operating handle 36 of the circuit breaker to the left, and the contact device of the circuit breaker is closed.
In conclusion, the present invention effectively overcomes various disadvantages of the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. An energy storage operating mechanism of a circuit breaker is characterized by comprising the following parts:
the connecting lever mechanism (1) is in transmission connection with a contact device of the circuit breaker, the connecting lever mechanism (1) is connected with an energy storage torsion spring (2), and the connecting lever mechanism (1) rotates towards the right to tighten the energy storage torsion spring (2) and enable the contact device to be switched off; the crank arm mechanism (1) rotates towards the left to release the energy storage torsion spring (2) and enable the contact device to be switched on, and the right side of the crank arm mechanism (1) is connected with a bayonet (3);
the energy storage gear set (4) is provided with a shifting roller (5), and the driving device (6) drives the energy storage gear set (4) to enable the shifting roller (5) to shift the crank arm mechanism (1) to rotate towards the right;
the tripping mechanism (7) comprises a clamping block (8) and a first rotating shaft (13) which are positioned on the right side of the crank arm mechanism (1), the lower end of the clamping block (8) is provided with a bayonet (11) for clamping the clamping pin (3), the upper end of the clamping block (8) is provided with a clamping jaw (12), the first rotating shaft (13) is provided with a clamping groove (14), and the first rotating shaft (13) is sleeved with a first reset torsion spring (15);
when the crank arm mechanism (1) rotates towards the right, the clamping pin (3) is clamped into the clamping opening (11) and pushes the lower end of the clamping block (8) to rotate towards the right, and the clamping jaw (12) simultaneously rotates towards the left to enter the clamping opening (14) and push the first rotating shaft (13) to rotate; when the claw (12) rotates to the left side of the first rotating shaft (13), the first reset torsion spring (15) twists the first rotating shaft (13) to reset so as to block the claw (12);
the first rotating shaft (13) is also connected with a tripping crank arm (16), and the tripping crank arm (16) can be driven by an electromagnet (17) to rotate so as to enable the clamping jaw (12) to pass through the clamping groove (14) and rotate rightwards.
2. The stored energy operating mechanism of a circuit breaker as claimed in claim 1, wherein: the fixture block (8) is connected to the second rotating shaft (18), the second rotating shaft (18) is sleeved with a second reset torsion spring (19), a limiting claw (20) is further arranged at the upper end of the fixture block (8), and the second reset torsion spring (19) tightly twists the second rotating shaft (18) to enable the limiting claw (20) to abut against the left side of the first rotating shaft (13).
3. The stored energy operating mechanism of a circuit breaker as claimed in claim 1, wherein: the energy-saving and energy-saving device is characterized by further comprising a rack (21) which is provided with a front side plate (22), a rear side plate (23) and a top plate (24), wherein the crank arm mechanism (1), the energy storage gear set (4) and the tripping mechanism (7) are located below the top plate (24) and are arranged between the front side plate (22) and the rear side plate (23).
4. The stored energy operating mechanism of a circuit breaker as claimed in claim 3, wherein: the crank arm mechanism (1) comprises a left crank arm group (25) and a right crank arm group (26) which are parallel to each other and have the same length, and the lower end of the left crank arm group (25) is connected with the lower end of the right crank arm group (26) through a connecting rod (27) extending left and right; the upper end of the left crank arm group (25) is hinged on a left connecting shaft (28), the upper end of the right crank arm group (26) is hinged on a right connecting shaft (29), and the left connecting shaft (28) and the right connecting shaft (29) are arranged between the front side plate (22) and the rear side plate (23) in parallel; the energy storage torsion spring (2) is sleeved on the left connecting shaft (28), one leading-out end of the energy storage torsion spring (2) horizontally extends and is pressed by the top plate (24), and the other leading-out end of the energy storage torsion spring (2) downwardly extends and is clamped by the left turning arm group (25); the bayonet lock (3) is connected to the right side of the right crank arm group (26).
5. The stored energy operating mechanism of a circuit breaker as claimed in claim 4, wherein: the left crank arm group (25) comprises a first front crank arm (30) and a first rear crank arm (31) which are parallel to each other and have the same length, and the upper end of the first front crank arm (30) and the upper end of the first rear crank arm (31) are hinged to the left connecting shaft (28); the lower end of the first front crank arm (30) and the lower end of the first rear crank arm (31) are connected together through a first swinging rod (32) extending forwards and backwards;
the right crank arm group (26) comprises a second front crank arm (33) and a second rear crank arm (34) which are parallel to each other and have the same length, and the upper end of the second front crank arm (33) and the upper end of the second rear crank arm (34) are hinged on the right connecting shaft (29); the lower end of a second front crank arm (33) and the lower end of a second rear crank arm (34) are connected together through a second swinging rod (35) extending forwards and backwards;
the circuit breaker is provided with an operating handle (36) in transmission connection with the contact device, and the upper end of the operating handle (36) is clamped between the first swinging rod (32) and the second swinging rod (35).
6. The stored energy operating mechanism of a circuit breaker as claimed in claim 5, wherein: the energy storage gear set (4) comprises a front side gear (37) and a rear side gear (38) which are coaxially arranged and driven by a driving device (6) to synchronously rotate, the rear side surface of the front side gear (37) and the front side surface of the rear side gear (38) are respectively provided with a shifting roller (5), the front side gear (37) and the rear side gear (38) synchronously rotate to enable the two shifting rollers (5) to respectively abut against the left side surface of the second front crank arm (33) and the left side surface of the second rear crank arm (34) to shift the right crank arm group (26) to rotate towards the right.
7. The stored energy operating mechanism of a circuit breaker as claimed in claim 6, wherein: and the second front crank arm (33) and the second rear crank arm (34) are respectively provided with a strip-shaped sliding block (39) which is in rolling fit with the shifting roller (5).
8. The stored energy operating mechanism of a circuit breaker as claimed in claim 6, wherein: the driving device (6) comprises a front transmission gear (41) and a rear transmission gear (42) which are coaxially fixed on a third rotating shaft (40), the third rotating shaft (40) is driven by a driving motor (54) to rotate, the third rotating shaft (40) is connected with a front rotating frame (43) and a rear rotating frame (44), the right end of the front rotating frame (43) and the right end of the rear rotating frame (44) are hinged on the third rotating shaft (40), the left ends of the front rotating frame (43) and the rear rotating frame (44) are respectively connected with a front floating gear (45) and a rear floating gear (46), and the front floating gear (45) and the rear floating gear (46) are respectively meshed with the front transmission gear (41) and the rear transmission gear (42); a third reset torsion spring (47) is sleeved on the third rotating shaft (40), the front rotating frame (43) and the rear rotating frame (44) are respectively pressed against the front side gear (37) and the rear side gear (38) by the third reset torsion spring (47), so that the front floating gear (45) and the rear floating gear (46) are respectively pressed on the front side gear (37) and the rear side gear (38), and the front floating gear (45) and the rear floating gear (46) are respectively meshed with the front side gear (37) and the rear side gear (38); the front side gear (37) and the rear side gear (38) are provided with tooth-lacking sections (48) with the same length at the same positions on the outer edge.
9. The stored energy operating mechanism of a circuit breaker as claimed in claim 8, wherein: a fourth rotating shaft (49) is arranged between the front side plate (22) and the rear side plate (23), and a front synchronous gear (50) and a rear synchronous gear (51) are coaxially fixed on the fourth rotating shaft (49); a front auxiliary gear (52) is coaxially fixed on the side surface of the front side gear (37), and a rear auxiliary gear (53) is coaxially fixed on the side surface of the rear side gear (38); the front synchronizing gear (50) is meshed with a front auxiliary gear (52), and the rear synchronizing gear (51) is meshed with a rear auxiliary gear (53).
10. The stored energy operating mechanism of a circuit breaker as claimed in claim 1, wherein: the lower end of the clamping block (8) is provided with a left clamping portion (9) and a right clamping portion (10), the length of the left clamping portion (9) is smaller than that of the right clamping portion (10), and a clamping opening (11) is formed between the left clamping portion (9) and the right clamping portion (10); when the right crank arm group (26) rotates towards the right, the clamping pin (3) is abutted against the right clamping part (10) to push the lower end of the clamping block (8) to rotate towards the right, so that the clamping pin (3) is clamped into the clamping opening (11).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711396748.8A CN107910235B (en) | 2017-12-21 | 2017-12-21 | Energy storage operating mechanism of circuit breaker |
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| CN201711396748.8A CN107910235B (en) | 2017-12-21 | 2017-12-21 | Energy storage operating mechanism of circuit breaker |
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| CN107910235A CN107910235A (en) | 2018-04-13 |
| CN107910235B true CN107910235B (en) | 2020-06-26 |
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| CN201711396748.8A Active CN107910235B (en) | 2017-12-21 | 2017-12-21 | Energy storage operating mechanism of circuit breaker |
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| CN113421804B (en) * | 2021-07-26 | 2024-08-30 | 苏州未来电器股份有限公司 | Energy storage type operating mechanism for circuit breaker |
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| CN107104025A (en) * | 2016-02-23 | 2017-08-29 | 浙江正泰电器股份有限公司 | The operating mechanism of breaker |
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| JPS6484530A (en) * | 1987-09-26 | 1989-03-29 | Mitsubishi Electric Corp | Operation mechanism of breaker |
| CN104377089A (en) * | 2014-11-18 | 2015-02-25 | 平高集团有限公司 | Energy accumulation tripping mechanism of breaker operating mechanism |
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| CN107910235A (en) | 2018-04-13 |
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