Spring operating device for circuit breaker

Abstract

The spring operating device comprises a front plate, a middle plate and a rear plate which are sequentially arranged from outside to inside, a first cavity is defined by the front plate and the middle plate, a second cavity is defined by the middle plate and the rear plate, and the spring operating device comprises an electric-manual energy storage mechanism fixedly installed on the front plate; the energy storage shaft penetrates through the front plate and the middle plate; the energy storage clutch mechanism is positioned in the first cavity; and the output shaft penetrates through the first cavity and the second cavity, and when the cam of the energy storage shaft drives the cam roller to act, the output shaft rotates to enable the mechanism output connecting rod to actuate the circuit breaker to be closed and enable the opening spring on the opening spring guide rod to store energy. Compared with the prior art, the spring operating device for the circuit breaker has the advantages of simplified assembly and high function integration level.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of operating mechanism of medium voltage distribution system, in particular to a spring operating device for circuit breaker. BACKGROUND

[0002] It is known that the circuit breaker cabinet is commonly used in the medium voltage distribution system for the power supply of residential areas and factory areas, and the cabinet type mostly adopts vacuum circuit breaker and disconnector, and the opening and closing of circuit is achieved by the opening and closing of circuit breaker and switch contacts, so as to ensure the normal operation of power supply, and therefore the mechanical operating system relied on has to meet various requirements to ensure the safe operation of switch. In order to ensure the working performance and reliability of circuit breaker, the working performance and quality of operating mechanism have to be high. Firstly, the switch has to be reliable and stable in action, and the braking has to be rapid; sufficient operating energy has to be provided to overcome the electric force generated by short-circuit fault current, to meet the opening and closing of circuit breaker; the closing has to be maintained, so as to ensure that the circuit breaker still remains in the closed position after the closing command and operating force disappear; the functions of buffering, free tripping, opening, resetting and the like have to be provided.

[0003] In order to meet the above technical function requirements, the spring operating device for circuit breaker has to be provided for the circuit breaker cabinet. At present, the spring operating device for circuit breaker in the medium voltage distribution system often has the following technical features:

[0004] 1. The distributed mode of modularization of functional units, and the components are distributed on the frame of circuit breaker according to energy storage module, closing module, opening module and state indication module, and the positioning of circuit breaker body is the positioning of several functional modules, so that the assembly and maintenance of circuit breaker are extremely convenient, but the mechanism is complex, the shape is large, and various inconveniences are brought to processing, and the product cost is also relatively increased;

[0005] 2. The components are dispersedly arranged on the frame of circuit breaker, and the operating mechanism has the characteristics of accurate position, but the components are many, the assembly and maintenance are inconvenient, and the relative increase of processing cost is also brought to ensure the position accuracy of components;

[0006] The half shaft tripping mode of this kind of operating mechanism has the problems of many tripping components, stress concentration of tripping components, easy deformation and difficult control of buckling angle, which increases the unstable factors of action of circuit breaker. The problems of this kind of tripping device are also reflected in the unadjustable tripping force, too large tripping force causing the opening and closing coils not to make the circuit breaker reliably act within the specified voltage range, and too small tripping force easily causing the circuit breaker to slip during the action process due to vibration, and generating misoperation.

[0007] As an attempt to solve the above deficiencies, a vacuum circuit breaker spring operating mechanism is disclosed in the document with the Chinese patent application publication number CN101656167A, which comprises a frame, characterized in that: an energy storage assembly is arranged in the middle part of the frame, a manual closing link assembly is arranged on the left side of the upper part of the frame, a manual opening link assembly is arranged on the right side of the upper part of the frame, a manual energy storage assembly is arranged in the lower part of the frame, an electric energy assembly is arranged in the lower part of the frame, and an electromagnet assembly is arranged in the upper part of the frame. The vacuum circuit breaker spring operating mechanism disclosed in the above document has the following advantages: the internal space of the operating mechanism is fully utilized, the integration of the operating mechanism is realized; the transmission components are reduced, the transmission process is simplified, and the reliability and stability of the mechanism are greatly improved; the visual adjustment of the buckling amount can be easily realized, and the failure of the circuit breaker to close or open during operation is avoided. Although the spring operating mechanism in the above document has the advantage of stable operation, its body structure is still complex, especially when the transmission components therein are processed and manufactured, there are many types of wire cutting, welding parts, and machined parts, and the machining precision requirement is high, which makes it difficult to process parts, high assembly requirement, difficult quality control, and not obvious cost competitiveness.

[0008] Therefore, there is still a practical need in the art to provide a circuit breaker spring operating device that can weaken or eliminate the pain points of processing and assembly technology, process, quality of each component in the spring operating device, preferably can also improve the service life, reliability, upward capacity of the body, and downward financial indicators such as cost reduction. SUMMARY

[0009] Therefore, the task of the present application is to provide a circuit breaker spring operating device, by which at least part of the above-mentioned disadvantages of the prior art are overcome.

[0010] According to one aspect of the present application, a spring operating device for circuit breaker is provided, which comprises a front plate, a middle plate and a back plate arranged in sequence from outside to inside, wherein a first chamber is defined by the front plate and the middle plate and a second chamber is defined by the middle plate and the back plate, wherein: a motor-hand energy storage mechanism fixedly mounted to the front plate, comprising: a motor located in the first chamber and an input shaft rotationally connected thereto, a transfer joint connected to the input shaft, a pinion fixed to the input shaft and a one-way bearing for pivotally supporting the input shaft, wherein the motor or the transfer joint is configured to drive the input shaft with the pinion to rotate; an energy storage shaft passing through the front plate and the middle plate, wherein an end of the energy storage shaft closer to the inside is provided with a spring hanging lever and an energy storage spring operatively connected thereto, wherein the energy storage shaft is configured to be operatively connected to the motor-hand energy storage mechanism to be driven to an energy storage position; an energy storage clutch mechanism located in the first chamber, comprising: a large gear sleeved to the energy storage shaft, wherein the large gear is configured to be in driving engagement with the pinion; a clutch-cam mechanism fixedly connected to the energy storage shaft, comprising: a pawl fixed to the large gear, a clutch wheel provided with an engagement groove capable of being operatively connected to the pawl and a cam riveted to the clutch wheel, wherein when the large gear is driven to rotate by the pinion, the clutch wheel is configured to drive the clutch-cam mechanism to rotate to drive the spring hanging lever and the energy storage spring to store energy; and an output shaft passing through the first chamber and the second chamber, wherein the output shaft is sleeved with, from outside to inside: a cam roller operatively connected to the cam in the energy storage clutch mechanism; a closing holding roller for maintaining the output shaft in a closing state; a trip spring lever operatively connected to a trip spring guide rod and a mechanism output shaft lever operatively connected to a mechanism output link, wherein when the cam of the energy storage shaft drives the cam roller to act, the output shaft is rotated to drive the mechanism output link to actuate the circuit breaker to close and drive the trip spring guide rod to store energy of the trip spring.

[0011] Compared with the prior art, the spring operating device for circuit breaker according to the present application has the advantages of simplified assembly and high functional integration. It can realize functions such as motor energy storage, motor closing and motor tripping, as well as manual energy storage, manual closing and manual tripping. Most of the parts are assembled by means of shape fitting, so that a large number of welding operations can be avoided, thereby improving the efficiency. The three-layer plate design arranged in parallel and at intervals can arrange all the secondary electrical components at the front plate, which is convenient for assembly and maintenance. According to the present application, the manufacturing cost of each spring operating device for circuit breaker can be reduced by 24% and the number of non-standard parts can be reduced by 26%, which can reduce the weight of the whole machine by 20% and improve the overall reliability.

[0012] As a preferred aspect of the present invention, wherein further comprising a closing operation mechanism located in the first chamber, comprising: a closing half shaft pivotally mounted to the front plate; an overlap roller disposed between the clutch wheel and the cam; and a closing catch mechanism located between the closing half shaft and the overlap roller, wherein the closing catch mechanism comprises: a closing catch shaft disposed between the closing half shaft and the energy storage shaft, a closing catch disposed on the closing catch shaft via a torsion spring, and a clutch switching wheel disposed on the closing catch shaft adjacent to the closing catch, wherein the clutch switching wheel is configured to be operatively connected with the pawl in the energy storage clutch to move it out of the engagement slot after the energy storage shaft is rotated.

[0013] As a preferred aspect of the present invention, wherein the closing catch has a first position operatively connected to the overlap roller and the closing half shaft and a second position disengaged from the closing half shaft, wherein in the first position it is used to hold the energy storage shaft in the energy storage position after the energy storage shaft is energized.

[0014] As a preferred aspect of the present invention, wherein further comprising a closing trip mechanism for switching the closing catch from the first position to the second position, comprising: a closing tripper located in the front plate; a closing trip top plate disposed on the closing half shaft operatively connected to the closing tripper; and an anti-coincidence lever operatively connected to the other end of the closing trip top plate.

[0015] As a preferred aspect of the present invention, wherein further comprising an opening operation mechanism located in the first chamber, comprising: an opening half shaft pivotally mounted to the front plate; an opening catch plate pivotally connected to the front plate, wherein the end of the opening catch plate is abuttable to the opening half shaft; an opening catch pivotally mounted to the front plate between the closing hold roller and the opening catch plate, wherein the opening catch is configured to be actuated by the closing hold roller between a first position and a second position, wherein in the first position the opening catch abuts the opening catch plate to the opening half shaft to hold the output shaft in the closing position.

[0016] As a preferred aspect of the present invention, wherein further comprising an opening trip mechanism for switching the opening catch from the first position to the second position, comprising: an opening tripper in the front plate operatively connected to the opening half shaft, comprising a coil core capable of driving the opening half shaft to rotate, wherein in response to the rotation of the opening half shaft, the opening catch is switched from the first position to the second position.

[0017] As a preferred aspect of the present application, wherein a low energy trip mechanism capable of performing trip operation at low energy is further included, it comprises: a low energy trip actuator located below the trip half shaft in the middle plate, wherein the low energy trip actuator is operatively connected with the trip half shaft; a reset slide plate fixedly connected with the low energy trip actuator; a slide plate reset spring for upwardly biasing the reset slide plate to reset; a drive crank arm pivotally mounted to the middle plate, wherein an end of the drive crank arm is operatively connected with the reset slide plate to, when in a first position, overcome the force of the slide plate reset spring and hold the reset slide plate in a state of resetting the low energy trip actuator and, when in a second position, release the operative connection with the reset slide plate; and a drive cam sleeved on the output shaft, wherein the drive cam is operatively connected with the other end of the drive crank arm to switch the drive crank arm from the first position to the second position when the output shaft is closed. Thus, according to the present application, reliable tripping of the circuit breaker at low control voltage can be achieved to solve the deficiency of the known medium voltage circuit breaker switch cabinet which generally only has the function of performing trip and close operations at normal operating voltage.

[0018] As a preferred aspect of the present application, wherein a trip and close indication mechanism located on the front plate is further included, it comprises: an output shaft cam sleeved on the end of the output shaft; a trip and close state indicator operatively connected with the cam; a counter located below the trip and close state indicator; and a counter tension spring operatively connected between the trip and close state indicator and the counter.

[0019] As a preferred aspect of the present application, wherein the trip spring crank arm of the end of the output shaft and the mechanism output shaft crank arm are riveted by a rivet.

[0020] As a preferred aspect of the present application, wherein further included are: an oil buffer pressure plate arranged on the output shaft near the cam roller; and an oil buffer cylinder arranged between the front plate and the middle plate and capable of abutting against the oil buffer pressure plate.

[0021] As a preferred aspect of the present application, wherein further included is an indication mark located on the outer end of the energy storage shaft for indicating whether the spring operating device for circuit breaker is in the energy storage state or the non-energy storage state.

[0022] Some of the other features and advantages of the present application will be apparent from the following detailed description, taken in connection with the accompanying drawings, which illustrate, by way of example, the principles of the application. BRIEF DESCRIPTION OF DRAWINGS

[0023] Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0024] Figure 1 is a perspective view of a spring operating device for circuit breaker according to an embodiment of the present application;

[0025] Figure 2 isFigure 1 Another perspective view of the spring operating device for circuit breakers in

[0026] Figure 3 is Figure 1 A side view of the spring operating device for circuit breakers in

[0027] Figure 4 is Figure 3 A top view of the spring operating device for circuit breakers in

[0028] Figure 5 is Figure 1 A perspective view of the spring operating device for circuit breakers in

[0029] Figure 6 is Figure 1 A front view of the spring operating device for circuit breakers in

[0030] Figure 7 is Figure 6 A front view of the spring operating device for circuit breakers in

[0031] Figure 8 is Figure 7 A front view of the spring operating device for circuit breakers in

[0032] Figure 9 is Figure 1 A perspective view of the energy storage clutch mechanism of the spring operating device for circuit breakers in

[0033] Figure 10 is Figure 9 A part of the energy storage clutch mechanism in

[0034] Figure 11 is Figure 9 Another part of the energy storage clutch mechanism in

[0035] Figure 12 is Figure 1 A perspective view of the motorized-manual energy storage mechanism of the spring operating device for circuit breakers in

[0036] Figure 13 is Figure 1 An installed and in use view of the motorized-manual energy storage mechanism of the spring operating device for circuit breakers in

[0037] Figure 14 isFigure 1 Figure showing the installation and use of the electric-motor hand energy storage mechanism of the spring operating device for circuit breaker in

[0038] Figure 15 Figure showing the installation and use of the electric-motor hand energy storage mechanism of the spring operating device for circuit breaker in Figure 1 Figure showing the installation and use of the electric-motor hand energy storage mechanism of the spring operating device for circuit breaker in

[0039] Figure 16 Figure showing the installation and use of the electric-motor hand energy storage mechanism of the spring operating device for circuit breaker in Figure 15 Figure showing the installation and use of the electric-motor hand energy storage mechanism of the spring operating device for circuit breaker in

[0040] Figure 17 Figure showing the installation and use of the electric-motor hand energy storage mechanism of the spring operating device for circuit breaker in

[0041] Figure 18 Figure showing the installation and use of the electric-motor hand energy storage mechanism of the spring operating device for circuit breaker in

[0042] BRIEF DESCRIPTION OF DRAWINGS

[0043] 10. spring operating device for circuit breaker; 10A. front plate; 10B. middle plate;

[0044] 10C. back plate; 100. electric-motor hand energy storage mechanism; 101. energy storage motor;

[0045] 101A. input shaft; 102. adapter; 103. pinion; 104. one-way bearing;

[0046] 105. mounting plate; 200. energy storage shaft; 201. spring hinged arm; 202. energy storage spring;

[0047] 203. indicator; 300. energy storage clutch mechanism; 301. large gear; 301A. screw;

[0048] 301B. torsion spring; 301C. pawl; 301D. pawl pin; 301E. spacer;

[0049] 302. clutch wheel; 302A. engagement slot; 303. cam; 304. lap roller;

[0050] 305. rivet pin; 400. output shaft; 401. cam roller; 402. closing hold-in roller;

[0051] 403. oil cushion pressure plate; 403A. oil cushion cylinder;

[0052] 404. opening spring hinged arm; 404A. opening spring guide rod;

[0053] 405. mechanism output shaft crank; 405A. mechanism output link;

[0054] 500. closing operation mechanism; 501. closing half shaft; 502. closing latch shaft;

[0055] 503. latch torsion spring; 504. closing latch; 505. clutch switching wheel; 506. bearing;

[0056] 600. opening operation mechanism; 601. opening half shaft; 602. opening latch; 603. opening buckle;

[0057] 700. opening and closing indication mechanism; 701. output shaft cam; 702. opening and closing state indicator;

[0058] 703. auxiliary switch; 704. counter tension spring; 705. counter;

[0059] 800. closing trip mechanism; 801. closing tripper; 802. closing trip top plate;

[0060] 802A. lower end of top plate; 802B. upper end of top plate; 803. anti-coincidence crank;

[0061] 900. low-energy opening trip mechanism; 901. low-energy opening tripper; 902. reset slide plate; 903. drive crank;

[0062] 904. drive cam; 905. slide plate reset spring; 906. mounting bracket; 907. slide plate;

[0063] 6. sliding groove;

[0064] X. length direction; Y. thickness direction; Z. height direction; DETAILED DESCRIPTION

[0065] With reference to the drawings, a detailed description of the illustrative embodiments of the spring operating device for circuit breakers disclosed in the present application is provided. Although the drawings are provided to present some embodiments of the present application, the drawings are not necessarily drawn to scale according to the specific embodiments, and some features can be enlarged, removed or partially cut to better show and explain the disclosure of the present application. Some components in the drawings can be adjusted in position according to actual needs without affecting the technical effects. The phrase "in the drawings" or similar language appearing in the specification does not necessarily refer to all drawings or examples.

[0066] Certain directional terms used herein below to describe the drawings, such as "inner", "outer", "upper", "lower" and other similar terms will be understood to have their ordinary meaning and refer to those directions that are relevant for the drawings as normally viewed. Unless otherwise indicated, the directional terms described in this specification are generally in accordance with the conventional directions as understood by those skilled in the art.

[0067] The terms "first", "the first", "second", "the second" and similar terms used herein in the present invention do not indicate any order, number or importance, but are used to distinguish one component from another.

[0068] In Figures 1 to 16 A spring operating device 10 according to the present invention is exemplarily shown in Fig. 1, which can be used for driving the switch of a circuit breaker to close, carry and open the current under normal circuit conditions and to close, carry and open the current under abnormal circuit conditions within a specified time. Herein, the spring operating device 10 is preferably adapted for a switchgear or ring main unit with vacuum interrupters. The spring operating device 10 according to the present invention has many new functional designs, such as electric-motor / hand energy storage, integrated energy storage holding and clutching, integrated opening and closing indication, counting and anti-coincidence functions, low-energy tripping function, etc.

[0069] In order to better represent the position of each functional component in the spring operating device 10 in space and the relative action relationship therebetween, the length direction of the spring operating device 10 is defined as the length direction or X direction, the longitudinal direction of the spring operating device 10 is defined as the thickness direction or Y direction, and the vertical height direction of the spring operating device 10 is defined as the height direction or Z direction, wherein the reference system composed of the above three or two directions is indicated in each view. It should be noted that the above reference system is only for the skilled person to better and intuitively understand the present invention, and is not intended to limit the protection scope of the present invention and should not be interpreted as a statement limiting the protection scope of the present invention.

[0070] As Figures 1-4 As shown in Fig. 1, the spring operating device 10 comprises a front plate 10A, a middle plate 10B and a rear plate 10C arranged in parallel and spaced apart in the longitudinal direction or Y direction (corresponding to the figure from outside to inside) in sequence, wherein the front plate 10A, the middle plate 10B and the rear plate 10C can be preferably punched or machined from, for example, aluminum alloy or metal sheet metal parts and reliably connected to each other by means of a plurality of fasteners or rivets. Further, punching operations are performed on the front plate 10A, the middle plate 10B and the rear plate 10C to form mounting holes for pivotally mounting the various functional components of the spring operating device 10. Preferably, the mounting holes are arranged in a plurality of rows in the length direction or X direction and in a plurality of columns in the thickness direction or Y direction.Figure 3 The first chamber in which the plurality of functional pieces of the spring operating device 100 for circuit breaker can be built-in is formed between the front plate 10A and the middle plate 10B, and the second chamber in which the plurality of functional pieces of the spring operating device 100 for circuit breaker can be built-in is formed between the middle plate 10B and the back plate 10C.

[0071] Further, a plurality of secondary electrical parts such as the adapter 102 of the electric-motorized energy storage mechanism 100, the closing release 801 and the closing release top plate 802 in the closing release mechanism 800, the low-energy opening release 901 in the opening release mechanism 900, the output shaft cam 701 and the opening and closing status indicator 702 of the opening and closing indication mechanism 700 can also be installed on the front plate 10A, while the transmission pieces of the closing operation mechanism 500 and the opening operation mechanism 600 which are in operative connection with the closing release mechanism 800 and the opening release mechanism 900 are built-in in the first chamber sandwiched by the front plate 10A and the middle plate 10B, and the action pieces such as the mechanism output link 405A, the opening spring guide rod 404A and the energy storage spring 202 which are in operative connection with the downstream components of the vacuum interrupter VI (driven by the spring operating device 10) in the switch cabinet are built-in in the second chamber sandwiched by the middle plate 10B and the back plate 10C. By virtue of the design of the three-plate structure, most or even all of the secondary electrical parts in the spring operating device 10 for circuit breaker according to the present application can be arranged on the front plate 10A, which on the one hand can allow the modular assembly of the operating device 10, so that the operation of the user is intuitive and convenient for the replacement and maintenance of the secondary electrical parts, and has good integrity; on the other hand, the overall force of the entire operating device 10 is more reasonable, whether in the inward and outward directions or in the length direction, which can be used to place the parts of the device, so that the operating device 10 works more reliably and has a longer service life compared with the prior art.

[0072] In Figures 2-3 As shown in the left lower position of the front plate 10A, the electric-motorized energy storage mechanism 100 for storing energy of the spring operating device 10 for circuit breaker is arranged, wherein the electric-motorized energy storage mechanism 100 includes the adapter 102 extending from the front plate 10A, allowing the user to combine and rotate the energy storage with a tool, and the input shaft 101A in operative connection therewith, wherein the small gear 103 for being in operative connection with the energy storage shaft 200 described in detail below and the one-way bearing 104 for allowing the input shaft 101A to rotate in one direction with respect to the front plate 10A are arranged at the end of the input shaft 101A in the first chamber. Figures 12 to 14The electric-manual energy storage mechanism 100 is shown in more detail below, and preferably includes an energy storage motor 101 sharing the same input shaft 101A with the manual input adapter 102. Preferably, a one-way clutch mechanism (not shown) is provided between the energy storage motor 101 and the input shaft 101A to allow the energy storage motor 101 to also drive the input shaft 101A to perform energy storage operations. This is, for example, in... Figure 13 As shown in the diagram, the input shaft 101A and its pinion 103 are rotated via the energy storage motor 101 to drive the energy storage shaft 200 to rotate. Of course, the energy storage motor 101 can be omitted (e.g., ...). Figure 14 As shown in the figure, the small gear 103 is driven to rotate by the user using a tool to rotate the adapter 102 for energy storage and the input shaft 101A operatively connected to it, thereby driving the energy storage shaft to rotate and store energy.

[0073] Furthermore, the circuit breaker spring operating device 10 also includes an energy storage shaft 200, which is built into the first chamber and arranged parallel to and spaced apart from the input shaft 101A, wherein in Figure 3 As best shown, the inner end of the energy storage shaft 200 extends through the middle plate 10B to a second chamber formed by the middle plate 10B and the inner plate 10C, and a spring-loaded crank arm 201 that rotates with it is fixedly provided at its inner end. One end of the spring-loaded crank arm 201 is fixedly connected to an energy storage spring 200 located in the second chamber, and the other end of the energy storage spring 200 is fixedly connected to a fastener for connecting the middle plate 10B and the rear plate 10C. Here, for example, when the energy storage shaft 200 is driven to rotate counterclockwise, the spring-loaded crank arm 201 causes the energy storage spring 200 to extend and store elastic potential energy. At the same time, as Figure 2 The energy storage shaft 200 shown has an indicator 203 located on the outer side of the front plate 10A at its outer end. This indicator 203 also rotates with the energy storage shaft 200, thereby indicating to the user whether the energy storage shaft 200 in the circuit breaker spring operating device 10 is in an energy-stored or non-energy-stored state. Preferably, the outer periphery of the indicator 203 at the outer end of the energy storage shaft 200 is also designed with a cam-shaped line, and a switch 204 (e.g., for obtaining the position signal of the energy storage shaft 200) is located below the indicator 203. Figure 1 (As shown). Thus, with the help of this design, users can intuitively obtain the current state of the energy storage shaft 200 to avoid misoperation. Furthermore, the switch 204 can also be used to achieve interlocking or mutual locking between the energy storage shaft 200 and other components.

[0074] Next Figures 9-11The energy storage clutch mechanism 300 of the spring operating device 10 for circuit breaker of the present application is shown in Fig. 2, wherein the energy storage clutch mechanism 300 comprises a large gear 301 sleeved on the energy storage shaft 200, and the large gear 301 is always engaged with the small gear 103 in the electric-motor and manual energy storage mechanism 100. It is to be noted that the large gear 301 sleeved on the energy storage shaft 200 is not in engagement with the energy storage shaft 200, and the engagement between the two is achieved by means of Figure 11 the engagement between the pawl 301C shown in Fig. 3 and Figure 9 the engagement between the clutch wheel 302 shown in Fig. 4. 10 The clutch wheel 302 and the cam 303 parallelly spaced apart from the clutch wheel 302 both have internal splines engaged with the splines on the energy storage shaft 200 to achieve rotation together with the energy storage shaft 200, and the clutch wheel 302 and the cam 303 are linked by means of the rivet pin 305. Thus, the driving connection of the energy storage shaft 200 is achieved by simple structure and assembly design, and the function integration is obviously increased.

[0075] The large gear 301 has the pawl 301C pivotable around the pawl pin 301D on the side facing the clutch wheel 302, and the pawl 301C is pivotably located between the large gear 301 and the clutch wheel 302 at a proper distance by means of the gasket 301E such as a copper gasket. The screw 301A is provided at a circumferential distance from the pawl 301C, and one leg of the torsion spring 301B pivotally mounted to the large gear 301 abuts against the screw 301A and the other leg abuts against the end of the pawl 301C to keep it in place. Corresponding to the pawl 301C (as shown in Fig. 3), the engagement groove 302A is provided on the outer periphery of the clutch wheel 302, so that the pawl 301C can be engaged with the clutch wheel 302 when it is under the action of the torsion spring 301B and the rotational motion from the large gear 301 is transmitted to the energy storage shaft 200 via the clutch wheel 302 and the cam 303 in one direction, and the rotational motion of the energy storage shaft 200 is not transmitted back to the large gear 301, i.e. the one-way clutch transmission relationship between the large gear 301 and the energy storage shaft 200 is achieved. Figures 9-10

[0076] Further, as shown in Fig. 5, the clutch wheel 302 is provided with a plurality of recesses 302B, and the cam 303 is provided with a plurality of protrusions 303A corresponding to the recesses 302B, so that the clutch wheel 302 and the cam 303 are linked by means of the recesses 302B and the protrusions 303A. Figures 9-10 ​As shown, the spring operating device 10 for circuit breaker further has a stored energy holding mechanism as a part of the closing operation mechanism 500 described below for holding the stored energy shaft 200 in its current position, wherein the stored energy holding mechanism comprises a closing pawl shaft 502 arranged between the closing half shaft 501 and the stored energy shaft 200, a closing pawl 504 sleeved to the closing pawl shaft 502 via a torsion spring 503, and a clutch switching wheel 505 arranged adjacent to the closing pawl 504 on the closing pawl shaft 502. Here the closing pawl shaft 502 is pivotally supported to the front plate 10A by means of a bearing 506 arranged adjacent to the front plate 10A. As shown in the figure, the closing pawl 504 is arranged to be in abutment with the stored energy shaft 200. Figure 10 As shown, the stored energy holding mechanism further comprises an overlap roller 304 fixedly arranged between the clutch wheel 302 and the cam 303 and capable of abutting against the closing pawl 504.

[0077] In assembling the stored energy holding mechanism of the spring operating device 10 for circuit breaker, the closing pawl 504 and the torsion spring 503 can be assembled to the closing pawl shaft 502 which has the clutch switching wheel 505 arranged adjacent to the closing pawl 504 integrated thereon. Thus the closing pawl shaft 502 is designed in a stepped manner, so as to serve as a positioning reference or a limiting piece for the closing pawl 504 in assembly by means of the integrated clutch switching wheel 505 to simplify the assembly difficulty. Then the overlap roller 304 is assembled between the clutch wheel 302 and the cam 303 and then fixedly connected by means of the rivet pin 305. Then the pawl 301C and the washer 301E are riveted to the gear wheel 301 by means of the pawl pin 301D and then the torsion spring 301B is arranged between the screw 301A and the pawl 301C in a manner with a certain pre-tightening force.

[0078] In the case of needing to rotate the stored energy shaft 200 to lengthen the stored energy spring 202, the pinion 103 engaged with the gear wheel 301 is rotated by means of the electric-motor manual stored energy mechanism 100. At this time, for example Figure 9The middle gear 301 rotates in the counterclockwise direction and drives the pawl 301C fixedly connected thereto to rotate. Under the action of the torsion spring 301B, the front end of the pawl 301C can be clamped into the engagement groove 302A of the clutch wheel 302, thereby driving the clutch wheel 302 and the cam 303 to rotate. Since the clutch wheel 302 and the cam 303 are drivingly connected with the energy storage shaft 200 through the splines, the energy storage shaft 200 also rotates in the counterclockwise direction, which drives the hook spring lever 201 and the energy storage spring 202 to act, thereby lengthening the energy storage spring 202. When the middle gear 301 is continuously rotated externally, the tail end of the pawl 301C on the middle gear 301 touches the clutch switching wheel 505 on the closing hook shaft 502, at which time the front end of the pawl 301C is lifted and disengaged from the engagement groove 302A of the clutch wheel 302, thereby decoupling or disengaging the driving relationship between the middle gear 301 and the energy storage shaft 200, to achieve energy storage clutching.

[0079] After the energy storage shaft 200 has completed the lengthening energy storage of the energy storage spring 200, the combination of the cam 303 and the clutch wheel 303 drives the lap roller 304 located therebetween to reliably abut against the tail of the closing hook 504 of the closing hook shaft 502, and also pushes the other end of the closing hook 504 to lap the closing half shaft 501 (as shown in Figure 9 The design achieves the purpose of keeping the energy storage shaft 200 and the associated mechanism in the energy-stored position.

[0080] As can be understood by those skilled in the art, in addition to the advantages of simplified assembly and high functional integration mentioned above, since the lap roller 304 is used to bear the holding force during energy storage or closing in the present application, this holding method can bear a considerable force, thereby prolonging the service life of the mechanism. Meanwhile, since the cam 303 and the clutch wheel 302 are riveted and the lap roller 304 for energy storage is integrated therebetween, the design is balanced in stress and high in mechanism strength, which reduces the material of the cam and the clutch wheel, saves materials and is more reliable in performance. Further, the closing hook shaft 502 is integrated with the clutch switching wheel 505, which is more reasonable in stress, reduces the amount of materials and reduces the number of parts.

[0081] As shown in Figures 3-7 The circuit breaker spring operating device 10 further includes an output shaft 400 arranged in parallel and spaced apart adjacent to the energy storage shaft 200 inside the first cavity, wherein the output shaft 400 is drivingly connected with the energy storage shaft 200 through the splines. Figure 4The inner end of the output shaft 400 extends through the middle plate 10B to the second chamber formed by the middle plate 10B and the inner plate 10C, and is fixed at the inner end thereof with a split spring crank 404 and a mechanism output shaft crank 405 which can rotate together. Preferably, the split spring crank 404 and the mechanism output shaft crank 405 at the end of the output shaft 400 adjacent to the rear plate 10C are arranged next to each other in the same posture on the output shaft 400. The innermost mechanism output shaft crank 405 is connected with a mechanism output link 405A for operating connection with the vacuum interrupter VI in the switchgear (downstream component driven by the spring operating device 10), and the split spring crank 404 is connected with a split spring guide 404A fixed at one end, wherein a split spring capable of being compressed and stored energy is sleeved on the split spring guide 404A. At this time, the split spring crank 404 and the mechanism output shaft crank 405 are fixedly connected with each other via rivets, which facilitates the manufacturing process of these components. That is, instead of using a cast steel structure with high processing difficulty and high cost, riveting can achieve the integration of functions.

[0082] Further, the output shaft 400 has a cam roller 401 adjacent to the cam 303 in the energy storage clutch mechanism 300, which is operatively connected with the cam 303 to receive the rotational energy from the energy storage shaft 200, and the cam roller 401 is fixedly connected with the output shaft 400 to rotate together. The cam roller 401 also has a close spring retaining roller 402 extending in the opposite direction (generally at a position of 180 degrees), so that when the cam roller 401 is driven to rotate by the cam 303, the close spring retaining roller 402 is also driven to rotate correspondingly. Preferably, in order to avoid excessive rotation of the output shaft 400, an oil buffer pressing plate 403 is also provided adjacent to the cam roller 401, and an oil buffer cylinder 403A is provided between the front plate 10A and the middle plate 10B, which can abut against the oil buffer pressing plate 403, and the distance between the two is designed to dampen the excessive rotational energy from the energy storage shaft 200 to the output shaft 400 by abutting the oil buffer cylinder 403A and the oil buffer pressing plate 403.

[0083] As described above, after the energy storage shaft 200 is driven by the electric-motor-manual energy storage mechanism 100 to elongate the energy storage spring 202, the energy storage shaft 200 is kept at the energy stored position by the close spring catch 504 lapped between the close spring half shaft 501 and the lapping roller 304. At this time, the close operation can be performed according to the operation of the user or the remote control signal, and the specific operation is as follows:

[0084] When the closing trip mechanism 800 located at the front plate 10A receives a closing signal or is manually operated by a user, the closing half shaft 501 abutting against the closing catch 504 will be rotated to release the abutting and restraining relationship between them. At this time, the closing catch 504 will no longer continue to abut or restrain the lapping roller 304 and the cam 303 fixedly connected thereto. As a result, the energy storage shaft 200 will rotate, for example, clockwise under the action of the energy storage spring 202. In this process, the cam 303 mounted on the energy storage shaft 200 will hit the cam roller 401 on the output shaft 400, so that the output shaft 400 is also correspondingly rotated counterclockwise. Thus, the output shaft 400 drives the mechanism output shaft crank 405 and the mechanism output link 405A located at the inner end to act, thereby driving the vacuum interrupter VI (downstream component driven by the spring operating device 10) in the switchgear to complete the closing operation. At the same time, with the counterclockwise rotation of the output shaft 400, the opening spring crank 404 and the opening spring guide rod 404A with the opening spring sleeved thereon connected in linkage are driven to act, so that the opening spring is compressed and stored energy.

[0085] Further, for example, as clearly shown in Figures 15-16 During the rotation of the output shaft 400, the closing retaining roller 402 mounted on the output shaft 400 and located on the opposite side of the cam roller 401 presses the opening catch 602 which will be described in detail below, so that the opening catch 602 rotates to avoid the output shaft 400. After the closing retaining roller 402 passes the highest point of the opening catch 602, the opening catch 602 is automatically reset under the action of the torsional spring force, and at the same time, the cam 303 has also rotated beyond the cam roller 401, so that the interaction force between the output shaft 400 and the energy storage shaft 200 is released. At this time, the output shaft 400 rotates back under the action of the opening spring sleeved on the opening spring guide rod 404A, until the closing retaining roller 402 contacts the opening catch 602. The opening catch plate 603 assembled with the opening catch 602 rotates under the action of the closing retaining roller 402, until the opening catch plate 603 abuts to the opening half shaft 601. As a result, the opening catch plate 603, the opening catch 602 and the output shaft 400 stop moving, at this time the circuit breaker spring operating device 10 is in the closing state, and is ready for the opening operation.

[0086] Next, the opening operation mechanism 600 of the circuit breaker spring operating device 10 will be described in detail in combination with the drawings, in which the most clear is Figure 16As shown, the tripping operation mechanism 600 includes a tripping half-shaft, a tripping latch plate pivotally connected to the front plate, the end of the tripping latch plate being connected to a tripping half-shaft 601 pivotally mounted between the front plate 10A and the middle plate 10B, a tripping latch plate 603 that can abut against the tripping half-shaft 601 by means of a torsion spring, and a tripping stop 602 located between the closing holding roller 402 and the tripping latch plate 603 and actuated by the closing holding roller 402.

[0087] As described above, after the output shaft 400 completes the closing operation and the opening spring is fully charged by the closing tripping mechanism 800, the circuit breaker spring operating device 10 is in the closed state and ready for the opening operation. At this time, the opening operation can be performed according to user operation or remote control signals, as follows:

[0088] When the tripping mechanism 900 located on the front panel 10A receives a tripping signal or when the user manually performs a tripping operation, the tripping half-shaft 601, which abuts against the tripping latch plate 603, can rotate, thereby releasing the abutment and constraint relationship between the two. See details. Figure 1 The tripping mechanism 900 includes a low-energy tripping unit 901 operatively connected to the tripping half-shaft 601 in the front panel. The low-energy tripping unit 901 includes a coil core capable of driving the tripping half-shaft to rotate, wherein in response to the rotation of the tripping half-shaft 601, the tripping stop 602 is switched from a first position to a second position.

[0089] Since the tripping plate 603 can rotate freely, the tripping stop 602 cannot provide sufficient holding force to maintain the output shaft 400 in the closed holding state by means of the closing holding roller 402. At this time, under the force of the energized tripping spring, the output shaft 400 will rotate clockwise, thereby driving the mechanism output shaft crank arm 405 and the mechanism output link 405A located at the inner end to move, thereby driving the vacuum interrupter VI (the downstream component driven by the spring operating device 10) in the switchgear to complete the tripping operation. Subsequently, the circuit breaker spring operating device 10 can again perform energy storage, closing and tripping operations by means of the electric-manual energy storage mechanism 100.

[0090] As a preferred aspect, for example in Figure 1 As shown in Figure 4, the circuit breaker spring operating device 10 also includes an opening / closing indicator mechanism 700 located on the front plate 10A. This opening / closing indicator mechanism 700 includes an output shaft cam 701 sleeved on the end of the output shaft 400 protruding from the front plate 10A, an opening / closing status indicator 702 operatively connected to the cam 701, a counter spring 704, and a counter 705 operatively connected to the counter spring 704. Preferably, in… Figure 4The output shaft cam 701 is preferably made of sheet metal, which is fixedly connected to the end of the output shaft 400 by means of fasteners and rotates with the output shaft 400. The arm of the cam 701 is operatively connected to the on-off state indicator 702, which is pivotally mounted to the front plate 10A, so that the rotary motion of the output shaft 400 is converted into the rotary motion of the on-off state indicator 702 about its own pivot axis. Preferably, the on-off state indicator 702 has an arc-shaped slot, in which a limiting pin fixed to the front plate 10A is arranged, so that the on-off state indicator 702 is prevented from rotating excessively. A counter 705 is arranged near the front end of the on-off state indicator 702, which is arranged below the on-off state indicator 702 and is operatively connected by means of a counter tension spring 704 arranged therebetween. Thus, each rotation of the on-off state indicator 702 is converted into an electrical signal recognizable by the counter 705. Preferably, the other side of the output shaft cam 701 is also provided with an auxiliary switch 703, which is operatively connected thereto, so that the current state of the output shaft 400 can be transmitted to the outside by means of the auxiliary switch 703 to achieve electrical interlocking or interlock.

[0091] Preferably, the closing trip mechanism 800 in the present application also includes a closing trip 801, which is arranged on the front plate 10A and is preferably an electromagnetic coil type, a closing trip top plate 802, which is operatively connected to the closing trip 801 and is sleeved on the closing half shaft 501, and an anti-coincidence toggle arm 803, which is operatively connected to the other end of the closing trip top plate 802. Specifically, the closing trip top plate 802 is an elongated rod, which has a sleeve hole fixedly connected to the closing half shaft 501 in the middle, wherein the lower end 802A of the elongated rod is operatively connected to the ejection end of the closing trip 801, and the upper end 802B is operatively connected to the anti-coincidence toggle arm 803. Here, the anti-coincidence toggle arm 803 is pivotally mounted on the front plate 10A and can be driven by the output shaft cam 701, so that when the output shaft 400 is in its closing holding state, the anti-coincidence toggle arm 803 is rotated to a horizontal position, i.e., abuts against the upper end 802B of the elongated closing trip top plate 802, so that even if the closing trip 801 is actuated to actuate the lower end 802A of the closing trip top plate 802, the closing trip top plate 802 cannot rotate the closing half shaft 501, thereby preventing the closing operation from occurring when the spring operating device 10 for circuit breaker is already in the closed state.

[0092] In order to solve the problem that the known medium voltage circuit breaker switch cabinet only has the function of performing the opening and closing operation under the normal operating voltage, as an optional mode, the spring operating device 10 for circuit breaker in the present application can also be provided with a low-energy opening trip mechanism 900 to allow the circuit breaker to be reliably opened under low control voltage. As shown in FIG. 6, the low-energy opening trip mechanism 900 in the present application includes an opening trip 901, which is arranged on the front plate 10A and is preferably an electromagnetic coil type, an opening trip top plate 902, which is operatively connected to the opening trip 901 and is sleeved on the opening half shaft 502, and an anti-coincidence toggle arm 903, which is operatively connected to the other end of the opening trip top plate 902. Specifically, the opening trip top plate 902 is an elongated rod, which has a sleeve hole fixedly connected to the opening half shaft 502 in the middle, wherein the lower end 902A of the elongated rod is operatively connected to the ejection end of the opening trip 901, and the upper end 902B is operatively connected to the anti-coincidence toggle arm 903. Here, the anti-coincidence toggle arm 903 is pivotally mounted on the front plate 10A and can be driven by the output shaft cam 701, so that when the output shaft 400 is in its opening holding state, the anti-coincidence toggle arm 903 is rotated to a horizontal position, i.e., abuts against the upper end 902B of the elongated opening trip top plate 902, so that even if the opening trip 901 is actuated to actuate the lower end 902A of the opening trip top plate 902, the opening trip top plate 902 cannot rotate the opening half shaft 502, thereby preventing the opening operation from occurring when the spring operating device 10 for circuit breaker is already in the open state. Figures 17-18As shown, the low-energy tripping release 901 is located at the lower end of the tripping half-shaft 601 in the middle plate 10B, the reset slide plate 902 is fixedly connected with the low-energy tripping release 901, the drive crank arm 903 is in operative connection with the reset slide plate 902, the drive crank arm 903 is pivotally mounted to the middle plate 10B via a torsion spring, the drive cam 904 is sleeved on the output shaft 400 and is in operative connection with the drive crank arm 903, and the slide plate reset spring 905 is capable of upwardly resetting the reset slide plate 902. Here, the low energy refers to the less electrical energy required during operation.

[0093] As a feasible example, the low-energy tripping release 901 is designed to include a low-energy release coil, which can be a bistable coil. A permanent magnet is used to maintain the attraction state, and after the moving end is compressed, the energy is stored in the compressed spring. Here, the low-energy release coil can be fixed, for example, by a bracket. The control circuit of the low-energy release coil can be exemplarily connected in series on the auxiliary switch of the circuit breaker operating mechanism. When the circuit breaker operating mechanism is in the closing state, the control circuit of the low-energy release coil is turned on, and when the circuit breaker operating mechanism is in the tripping state, the control circuit is turned off. After the circuit breaker protection device gives a tripping signal, the electromagnetic force offsets the attraction force of the permanent magnet, and the spring energy is released to allow the moving end to be pushed out. The low energy refers to the less electrical energy required during operation. Thus, by using the low-energy release, the remote operation tripping requirement can be reliably met, the manual closing function of the permanent magnet mechanism switch can be realized, and the demand for manual closing peak fault current of the permanent magnet switch can be met.

[0094] Specifically, the low-energy tripping release 901 shown here can be fixedly connected to the mounting bracket 906 by means of a cross-slot half-head screw. Here, the reset slide plate 902 can reciprocate vertically relative to the mounting bracket 906 and the low-energy tripping release 901 by means of the guide sliding groove 906A on the mounting bracket 906. Here, the moving end of the low-energy tripping release 901 can protrude to abut against the actuating top plate sleeved on the tripping half-shaft 601, and the other end thereof is fixedly connected to the reset slide plate 902 by a nut. The slide plate reset spring 905 is located between the mounting bracket 906 and the reset slide plate 902 to always tend to keep the reset slide plate 902 in a position close to the mounting bracket 906.

[0095] In the present application, as shown in Figures 17 to 18 If the low-energy tripping release mechanism 900 detects an abnormality, a tripping signal is given to the low-energy tripping release 901, as shown in the In the tripping process of the circuit breaker spring operating device 10, the output shaft 400 drives the drive cam 904 assembled thereon to rotate, thereby causing the drive crank arm 903 to rotate and drive the reset slide plate 902 to move downwardly along the guide sliding groove 906A on the mounting bracket 906, and the slide plate reset spring 905 is compressed.Figure 17 When the left end of the drive cam 904 loses the support, it rotates under the action of the reset torsion spring of the toggle arm. This makes the roller assembled on the drive toggle arm 903 pull down the reset slide plate 902, and through the bolt at the tail of the low-energy trip breaker 901, the low-energy trip breaker 901 that has been extended is reset. Further, when the circuit breaker spring operating device 10 is closed, the output shaft 400 drives the drive cam 904 assembled thereon to rotate in the counterclockwise direction shown in FIG. 2 and push the roller at the left end of the drive toggle arm 903 to be pressed down and make the drive toggle arm 903 rotate counterclockwise. As a result, the reset slide plate 902 is pulled up and reset under the action of the slide plate reset spring 905, thereby providing space for the low-energy trip breaker 901 to act again. Figure 17 When the left end of the drive cam 904 loses the support, it rotates under the action of the reset torsion spring of the toggle arm. This makes the roller assembled on the drive toggle arm 903 pull down the reset slide plate 902, and through the bolt at the tail of the low-energy trip breaker 901, the low-energy trip breaker 901 that has been extended is reset. Further, when the circuit breaker spring operating device 10 is closed, the output shaft 400 drives the drive cam 904 assembled thereon to rotate in the counterclockwise direction shown in FIG. 2 and push the roller at the left end of the drive toggle arm 903 to be pressed down and make the drive toggle arm 903 rotate counterclockwise. As a result, the reset slide plate 902 is pulled up and reset under the action of the slide plate reset spring 905, thereby providing space for the low-energy trip breaker 901 to act again.

[0096] Based on the above description, the circuit breaker spring operating device 10 according to the present application can meet the mechanical characteristic requirements of different circuit breakers by changing the positions, angles and sizes of the functional components and the power of the energy storage spring, and can realize electric energy storage, electric closing and electric tripping, and can also realize manual energy storage, manual closing and manual tripping; can realize single tripping and single closing, and can also realize reclosing; and can also meet the interlocking function of avoiding secondary closing after closing.

[0097] At the same time, since most of the parts of the circuit breaker spring operating device 10 are assembled by means of shape fit, a large number of welding operations can be avoided, thereby improving the efficiency. And the three-layer plate design arranged in parallel and at intervals can arrange all the secondary electrical components at the front plate 10A, which is convenient for assembly and maintenance. According to the calculation, the manufacturing cost of each circuit breaker spring operating device 10 according to the present application can be reduced by 24% and the number of non-standard parts can be reduced by 26%, which makes the weight of the whole machine reduced by 20% without affecting the overall reliability.

[0098] It should be understood that although the present specification is described in terms of various embodiments, not every embodiment contains only one independent technical solution, and the present specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be combined to form other embodiments that those skilled in the art can understand.

[0099] The above description is only a specific embodiment of the present application and is not intended to limit the scope of the present application. Any equivalent changes, modifications and combinations made by those skilled in the art without departing from the concept and principles of the present application shall fall within the scope of the present application.

Claims

1. A spring-operated device for a circuit breaker, comprising a front plate, a middle plate, and a rear plate arranged sequentially from the outside to the inside, wherein the front plate and the middle plate define a first chamber and the middle plate and the rear plate define a second chamber, characterized in that, include: An electric-manual energy storage mechanism fixedly mounted to the front panel includes: The motor located in the first chamber and the input shaft rotatably connected to it, The adapter connected to the input shaft, the pinion fixed to the input shaft, and A one-way bearing is used to pivotally support the input shaft, wherein the motor or adapter is configured to drive the input shaft with a pinion to rotate; An energy storage shaft passes through the front plate and the middle plate, wherein the inner end of the energy storage shaft is provided with a spring-loaded crank arm and an energy storage spring operably connected thereto, wherein the energy storage shaft is configured to be operably connected to an electric-manual energy storage mechanism to be driven to the energy storage position; The energy storage clutch mechanism located in the first chamber includes: A large gear is fitted onto the energy storage shaft, wherein the large gear is configured to mesh with a small gear. The clutch-cam mechanism is fixedly connected to the energy storage shaft. It includes a pawl fixed on a large gear, a clutch wheel with a engagement groove that can be operably connected to the pawl, and a cam riveted to the clutch wheel. When the large gear is driven to rotate by the small gear, the clutch wheel is configured such that the pawl drives the clutch-cam mechanism to rotate, thereby driving the hanging spring crank arm and the energy storage spring to store energy. An output shaft passing through the first chamber and the second chamber, wherein the output shaft is fitted with, from the outside to the inside, the following: A cam roller that is operated and connected to the cam in the energy storage clutch mechanism; A closing holding roller used to keep the output shaft in the closed state; The trip spring crank arm is operatively connected to the trip spring guide rod and the mechanism output shaft crank arm is operatively connected to the mechanism output link, wherein when the cam of the energy storage shaft drives the cam roller to move, the output shaft rotates to cause the mechanism output link to actuate the circuit breaker to close and to store energy in the trip spring on the trip spring guide rod.

2. The spring-operated device for a circuit breaker as described in claim 1, characterized in that, It also includes a closing operation mechanism located in the first chamber, which comprises: The closing half-shaft is pivotally mounted to the front panel; The overlapping rollers positioned between the clutch wheel and the cam; and A closing braking mechanism located between the closing half-shaft and the lap roller, wherein the closing braking mechanism includes: The closing stop shaft is arranged between the closing half shaft and the energy storage shaft, the closing stop is sleeved on the closing stop shaft via a torsion spring, and the clutch switching wheel is arranged on the closing stop shaft adjacent to the closing stop. The clutch switching wheel is configured to be able to operate and connect with the pawl in the energy storage clutch mechanism after the energy storage shaft rotates, so as to remove it from the engagement groove.

3. The spring-operated device for a circuit breaker as described in claim 2, characterized in that, The closing stop has a first position where one end is operatively connected to the lap roller and the other end is operatively connected to the closing half shaft, and a second position where it is disengaged from the closing half shaft. In the first position, it is used to hold the energy storage shaft in the energy storage position after energy storage.

4. The spring-operated device for a circuit breaker as described in claim 3, characterized in that, It also includes a closing tripping mechanism for switching the closing stop from the first position to the second position, which includes: The closing trip unit is located on the front panel; The closing trip top plate, which is connected to the closing trip unit and sleeved on the closing half shaft; and An anti-reclosing crank arm is operatively connected to the other end of the top plate of the closing trip unit.

5. The spring-operated device for a circuit breaker as described in claim 1, characterized in that, It also includes a tripping operation mechanism located in the first chamber, which comprises: The trip half-shaft is pivotally mounted to the front panel; A tripping latch plate pivotally connected to the front panel, wherein the end of the tripping latch plate can abut against the tripping half shaft; A trip stop is pivotally mounted to the front panel between the closing holding roller and the trip stop plate, wherein the trip stop is configured to be actuated by the closing holding roller between a first position and a second position, wherein in the first position the trip stop abuts the trip stop plate against the trip half shaft to hold the output shaft in the closed position.

6. The spring-operated device for a circuit breaker as described in claim 5, characterized in that, It also includes a tripping mechanism for switching the tripping stop from the first position to the second position, which includes: The trip unit, operatively connected to the trip half-shaft in the front panel, includes a coil core capable of driving the trip half-shaft to rotate, wherein the trip lever switches from a first position to a second position in response to the rotation of the trip half-shaft.

7. The spring-operated device for a circuit breaker as described in claim 6, characterized in that, It also includes a low-energy tripping mechanism capable of tripping with low energy, which includes: A low-energy trip unit located below the trip half-shaft in the middle plate, wherein the low-energy trip unit is operatively connected to the trip half-shaft; A reset slide plate fixedly connected to the low-energy trip unit; A slide return spring used to bias the return slide upwards and reset it; A drive crank arm pivotally mounted to the middle plate, wherein the end of the drive crank arm is operatively connected to the reset slide plate to overcome the force of the slide plate reset spring and hold the reset slide plate in a state that resets the low-energy trip unit in a first position and to disengage from the reset slide plate in a second position. A drive cam is fitted onto the output shaft, wherein the drive cam is operably connected to the other end of the drive crank arm to switch the drive crank arm from its first position to its second position when the output shaft is closed.

8. The spring-operated device for a circuit breaker as described in claim 1, characterized in that, It also includes an opening / closing indicator mechanism located on the front panel, which includes: An output shaft cam fitted onto the end of the output shaft; A circuit breaker status indicator that is operatively connected to the cam; The counter located below the opening / closing status indicator; and The counter spring is operated between the opening / closing status indicator and the counter.

9. The spring-operated device for a circuit breaker as described in claim 1, characterized in that, The crank arm of the breaker spring at the end of the output shaft and the crank arm of the mechanism output shaft are riveted together.

10. The spring-operated device for a circuit breaker as described in claim 1, characterized in that it further includes... include: An oil buffer pressure plate is arranged on the output shaft near the cam roller; as well as An oil buffer cylinder is installed between the front plate and the middle plate and can abut against the oil buffer pressure plate.

11. The spring-operated device for a circuit breaker as described in any one of claims 1 to 10, characterized in that, It also includes an indicator located at the outer end of the energy storage shaft, used to indicate whether the spring operating device of the circuit breaker is in an energy storage or non-energy storage state.

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