WO2022062207A1 - Mécanisme d'actionnement pour disjoncteur - Google Patents

Mécanisme d'actionnement pour disjoncteur Download PDF

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Publication number
WO2022062207A1
WO2022062207A1 PCT/CN2020/135682 CN2020135682W WO2022062207A1 WO 2022062207 A1 WO2022062207 A1 WO 2022062207A1 CN 2020135682 W CN2020135682 W CN 2020135682W WO 2022062207 A1 WO2022062207 A1 WO 2022062207A1
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WO
WIPO (PCT)
Prior art keywords
cam
assembly
shaft
pair
energy storage
Prior art date
Application number
PCT/CN2020/135682
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English (en)
Chinese (zh)
Inventor
陈斌
丁晓辉
周敏琛
Original Assignee
常熟开关制造有限公司(原常熟开关厂）
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 常熟开关制造有限公司(原常熟开关厂） filed Critical 常熟开关制造有限公司(原常熟开关厂）
Publication of WO2022062207A1 publication Critical patent/WO2022062207A1/fr

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Classifications

    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H3/3005—Charging means
    • H01H3/3015—Charging means using cam devices

Definitions

  • the invention belongs to the technical field of low-voltage electrical appliances, and particularly relates to an operating mechanism of a circuit breaker.
  • the circuit breaker includes an operating mechanism, which is used to perform the closing and opening operations of the circuit breaker, and is the core component of the circuit breaker.
  • the energy storage system is an important part of the operating mechanism. When storing energy, the cam shaft drives the cam to rotate, and the cam drives the energy storage lever to compress the energy storage spring to achieve energy storage.
  • the operating mechanism includes a spring assembly, an energy storage lever assembly, a connecting rod assembly and a cam assembly.
  • the cam assembly is first unlocked, and the cam assembly unlocks the energy storage lever assembly.
  • the spring assembly pushes the energy storage lever assembly.
  • the lever assembly moves, the energy storage lever assembly drives the connecting rod assembly to move, the connecting rod assembly moves to drive the rotating shaft of the operating mechanism to move, and the rotating shaft moves the contact system to perform the closing action.
  • the task of the present invention is to provide an operating mechanism of a circuit breaker, which can effectively prevent vicious collision of the cam assembly, and can transfer the energy of the rotation of the cam assembly to the energy storage lever assembly, thereby improving the energy utilization rate of the operating mechanism.
  • An operating mechanism of a circuit breaker includes a pair of side plates arranged opposite to each other, a cam assembly and an energy storage lever assembly that are rotatably arranged between the pair of side plates, and are located on a pair of sides.
  • the spring assembly between the plates, the cam assembly includes a cam plate group and a camshaft, the camshaft is rotatably arranged between a pair of side plates, and the cam plate group is fixed on the camshaft,
  • the cam assembly also includes a collision piece, and the collision piece rotates synchronously with the cam plate group;
  • the energy storage lever assembly is provided with a collision piece, and during the energy release process, the spring assembly is The force causes the cam assembly to rotate and the energy storage lever assembly to rotate; after the cam assembly rotates, the collision piece rotates and hits the impacted piece, and the collision piece applies a different amount of energy to the impacted piece.
  • the torque that can make the lever assembly rotate in the same direction.
  • the collision member is in the shape of a sheet, and the collision member is in the shape of a shaft.
  • the collision piece includes a mounting hole, a positioning shaft hole and a positioning shaft, and a collision surface is further provided on the outer edge surface of the collision piece, and the mounting hole is used for When the camshaft passes through, the positioning shaft passes through the positioning shaft hole, the two ends of the positioning shaft are connected to the cam plate group, and the impact surface is used to connect with the Collision of the impacted parts.
  • the cam piece group includes a first cam piece and a second cam piece; both the first cam piece and the second cam piece are fixedly sleeved on the cam On the shaft, the first cam pieces are two and are arranged at intervals, and the two ends of the positioning shaft are respectively connected to the two first cam pieces on both sides.
  • the energy storage lever assembly includes a pair of spaced-apart lever pieces and a rotating shaft, a fixed shaft is arranged between the pair of lever pieces, and both are arranged on the pair of lever pieces.
  • There is a first rotation hole the rear ends of the rotation shaft passing through the first rotation hole are respectively arranged on a pair of side plates, the energy storage lever assembly swings around the rotation shaft; the impacted member is fixed between a pair of lever plates.
  • a spring engaging shaft is provided on a swinging end of the pair of lever pieces, and during the energy release process of the operating mechanism, the spring assembly drives the spring The cooperating shaft swings;
  • a pushing shaft is arranged on the other swinging end of the pair of lever pieces, and the pushing shaft drives the cam assembly to rotate during the energy release process of the operating mechanism.
  • the pushing shafts are a pair, which are respectively located on the opposite outer sides of the pair of lever pieces and are symmetrically arranged.
  • limit bushings are respectively sleeved on the shaft segments of the camshaft located between the collision member and the first cam pieces on both sides.
  • the impact surface is an arc surface.
  • the present invention adopts the above structure, it has the beneficial effects: during the energy release process of the operating mechanism, the collision piece in the cam assembly and the collision piece in the energy storage lever assembly will collide, and the collision has two effects: First, the kinetic energy of the cam assembly is released, effectively preventing vicious collision of the cam assembly, and buffering; second, the energy of the cam assembly is transferred to the energy storage lever The rotational energy in the closing process is strengthened once, which improves the energy utilization rate of the operating mechanism.
  • FIG. 1 is a schematic diagram of an internal state of the operating mechanism according to the present invention.
  • FIG. 2 is a schematic diagram of another internal state of the operating mechanism according to the present invention.
  • FIG. 3 is a schematic structural diagram of the energy storage lever assembly according to the present invention.
  • FIG. 4 is an exploded schematic view of the cam assembly of the present invention.
  • FIG. 5 is a schematic diagram of the brake pad in the cam assembly according to the present invention.
  • FIG. 6 is a schematic diagram of a state in which the cam assembly of the present invention cooperates with the energy storage lever assembly.
  • FIG. 7 is another state schematic diagram of the cooperation of the cam assembly and the energy storage lever assembly according to the present invention.
  • FIG. 8 is a schematic diagram of still another state of the cooperation of the cam assembly and the energy storage lever assembly according to the present invention.
  • FIG. 9 is a schematic diagram of a vicious collision between the cam assembly and the energy storage lever assembly in the prior art.
  • Cam assembly 11. First cam piece, 12. Second cam piece, 13. Camshaft, 14. Collision piece, 141. Mounting hole, 142. Positioning shaft hole, 143. Impact surface, 15. Positioning shaft, 16. Locking piece;
  • the present invention relates to an operating mechanism of a circuit breaker
  • the circuit breaker includes an operating mechanism and a contact system, and includes a pair of side plates 100 arranged facing each other, and a cam assembly 1 is arranged between the pair of side plates 100 , energy storage lever assembly 2, spring assembly 3 and connecting rod assembly 4.
  • the cam assembly 1 and the energy storage lever assembly 2 are both rotatably arranged between a pair of side plates 100; the spring assembly 3 is located between the pair of side plates 100, and the spring assembly 3 is retractable to release or Store energy; the connecting rod assembly 4 can transmit the movement of the energy storage lever assembly 2 to the rotating shaft of the circuit breaker, so that the rotating shaft of the circuit breaker rotates and drives the contact system to act.
  • the energy storage lever assembly 2 includes a pair of lever pieces 21 arranged at intervals, and a fixed shaft 24 is provided between the pair of lever pieces 21 .
  • One end of the fixed shaft 24 is connected with a lever piece 21 , and the other end is connected with another lever piece 21 .
  • the number of the fixed shafts 24 is three, so as to ensure that the pair of lever pieces 21 are stably arranged at intervals.
  • a pair of lever pieces 21 is provided with a rotating hole 211 , and the rotating hole 211 is used for the installation of a rotating shaft 22 . on the side panel 100.
  • the energy storage lever assembly 2 swings around the rotation axis 22 , that is, the rotation axis 22 is the rotation center of the energy storage lever assembly 2 .
  • a spring matching shaft 23 is provided on a swinging end of the pair of lever pieces 21 , and the spring matching shaft 23 is used to cooperate with the spring assembly 3 , that is, when all the When the spring assembly 3 extends, the spring assembly 3 pushes the spring matching shaft 23, thereby driving the energy storage lever assembly 2 to rotate.
  • a pushing shaft 25 is provided on the other swinging end of the pair of lever pieces 21 .
  • the pushing shaft 25 is a pair, which are respectively located on the opposite outer surfaces of the pair of lever pieces 21 . and set symmetrically. The push shaft 25 is used for push fit with the cam assembly 1 .
  • the spring assembly 3 drives the spring matching shaft 23 to swing; a pushing shaft 25 is provided on the other swinging end of the pair of lever pieces 21, and when the operating mechanism is released During the operation, the pushing shaft 25 drives the cam assembly 1 to rotate.
  • the spring fitting shaft 23 and the pushing shaft 25 are both provided with bushings, which are used to reduce the frictional force when pushing and fitting with other components and improve the spring fitting shaft 23 and the pushing shaft 25. The service life of the finalizer 25.
  • the energy storage lever assembly 2 is provided with a collision member 26 .
  • the collision member 26 is shaft-shaped, and the collision member 26 is located on a pair of levers. Between the pieces 21 , the impact member 26 is fixed between a pair of lever pieces 21 . When the energy storage lever assembly 2 swings, the impacted member 26 also swings around the rotation center of the energy storage lever assembly 2 , that is, the rotation shaft 22 .
  • the cam assembly 1 includes a cam plate group and a cam shaft 13 , and the cam shaft 13 is rotatably disposed between a pair of side plates 100 .
  • the cam plate group is fixed on the cam shaft 13, and the cam plate group includes a first cam plate 11 and a second cam plate 12; the first cam plate 11 and the second cam plate 12 are both.
  • the camshaft 13 is fixedly sleeved, that is, the first cam piece 11 and the second cam piece 12 do not rotate relative to the camshaft 13 .
  • the first cam piece 11 and the second cam piece 12 are respectively snap-fitted with the camshaft 13 to ensure that the first cam piece 11 and the second cam piece 12 will not rotate relative to the camshaft 13 .
  • the camshaft 13 is provided with a raised snap bar
  • the first cam piece 11 and the second cam piece 12 are provided with a corresponding snap slot
  • the snap bar Fits with the snap-fit slot.
  • a cam piece fixing shaft is also fixed between the first cam piece 11 and the second cam piece 12, for fixing the two together at intervals.
  • the first cam pieces 11 are two pieces and are arranged at intervals, wherein one piece of the first cam piece 11 is fixed with two pieces of the second cam piece 12 , and the other piece of the first cam piece 11 and one piece of the second cam piece 12 and one piece of the second cam piece 12 are fixed.
  • the locking pieces 16 are superimposed and fixed.
  • the operating mechanism is also provided with a closing lever (not shown in the figure) for locking the cam assembly 1, and the locking piece 16 is used to lock and cooperate with the closing lever.
  • the closing lever locks the locking piece 16, and when the operating mechanism is released to perform the closing action, the closing lever unlocks the locking piece 16, and then the closing lever unlocks the cam assembly 1 .
  • a part of the shaft section of the camshaft 13 located between the pair of first cam pieces 11 is sleeved with a collision piece 14 .
  • the collision piece 14 is the sheet body structure.
  • the collision piece 14 includes a mounting hole 141 and a positioning shaft hole 142 , and a collision surface 143 is further provided on the outer edge surface of the collision piece 14 .
  • the mounting hole 141 is used for the camshaft 13 to pass through.
  • the positioning shaft hole 142 is used to cooperate with a positioning shaft 15, that is, both ends of the positioning shaft 15 are connected to the two first cam pieces 11, and the positioning shaft 15 passes through the positioning shaft 15.
  • Axle hole 142 is used to cooperate with a positioning shaft 15, that is, both ends of the positioning shaft 15 are connected to the two first cam pieces 11, and the positioning shaft 15 passes through the positioning shaft 15.
  • the collision piece 14 rotate synchronously with the first cam piece 11 and the second cam piece 12 .
  • the collision piece 14 , the first cam piece 11 and the second cam piece 12 Both are in a fixed connection relationship with the camshaft 13, that is, they rotate synchronously during the rotation.
  • the impact surface 143 is an arc surface to meet the requirements of its work.
  • the shaft sections of the camshaft 13 located between the collision member 14 and the first cam pieces 11 on both sides are respectively sleeved with limit bushings 200 , namely the limit bushes 200 There are two, so that the position of the collision piece 14 on the camshaft 13 is limited, and the sliding of the collision piece 14 on the camshaft 13 is prevented.
  • the collision piece 14 cooperates with the collision piece 26 .
  • the collision piece 14 applies a torque to the collision piece 26 . It is used to strengthen the rotational energy of the energy storage lever assembly 2 during the closing action. That is, the collision piece 14 applies a torque to the collision piece 26 that is consistent with the rotation direction of the energy storage lever assembly 2 during the closing process.
  • the torque of the collision member 14 to the collision member 26 is used to strengthen the upward swing of the energy storage lever assembly 2 .
  • the direction of the force generated by the collision piece 14 on the collision piece 26 is tangent to the rotation direction of the collision piece 26 , So as to achieve optimal energy transfer.
  • the energy storage lever assembly 2 is in an energy storage state, and the outer edge of the first cam piece 11 of the cam assembly 1 abuts against the pushing shaft 25 on the energy storage lever assembly 2 At this time, the pressing shaft 25 generates a force F1 on the first cam piece 11 as shown in FIG. 6 .
  • the source of this force F1 is provided by the spring assembly 3 .
  • the cam assembly 1 cannot act due to the locking of the closing lever.
  • the closing lever releases the locking of the cam assembly 1 . Because the outer edge of the first cam piece 11 is involute shape. Therefore, the acting force F1 causes the first cam piece 11 to rotate.
  • the first cam piece 11 rotates clockwise, which is viewed from the position shown in FIG. 6 .
  • the spring assembly 3 releases energy and starts to extend, the spring assembly 3 pushes away the spring matching shaft 23 of the energy storage lever assembly 2, and the energy storage lever assembly 2 rotates to drive the first A cam piece 11 rotates in a clockwise direction, and makes the cam assembly 1 separate from the energy storage lever assembly 2, and further the operating mechanism enters the state shown in FIG. 7 .
  • the operating mechanism is in an intermediate state during the energy release process, and the outer edge of the first cam piece 11 of the cam assembly 1 has been separated from the push shaft 25 on the energy storage lever assembly 2 .
  • the collision member 14 rotates along with the camshaft 13 , and the collision member 14 collides with the collision member 26 on the energy storage lever assembly 2 .
  • the collision The impact surface 143 on the member 14 collides with the impacted member 26 .
  • the force F2 exerted by the collision member 14 on the collision member 26 is F2, and the acting force F2 makes the energy storage lever assembly 2 obtain a new driving force in the original energy releasing motion through the collision member 26 .
  • the kinetic energy of the cam assembly 1 is released through the collision between the collision surface 143 and the collision member 26 , which effectively prevents the cam assembly 1 from colliding with badly.
  • the closing action speed of the energy storage lever assembly 2 is faster, and the energy utilization rate of the operating mechanism is improved.
  • the energy storage lever assembly 2 is continuously pushed by the spring assembly 3 to enter the state shown in FIG. 8 .
  • the spring assembly 3 is in a released state, that is, the spring assembly 3 is stretched to the longest state.
  • both ends of the spring-fitted shaft 23 on the energy storage lever assembly 2 slide to the limit position along the limit groove 101 on the side plate 100 .
  • Limiting grooves 101 are provided at symmetrical positions of the pair of side plates 100 .
  • a reinforcement member 102 is provided on the periphery of the limiting slot 101 corresponding to the energy release state of the spring assembly 3 , and the reinforcement member 102 is attached to the side plate 100 .
  • Both ends of the spring-fitted shaft 23 slide in the limiting groove 101 , so as to limit the swing angle of the energy storage lever assembly 2 . In the state of FIG. 8 , the energy storage lever assembly 2 swings to the limit position.
  • the kinetic energy of the cam assembly 1 is released due to the collision between the collision member 14 and the collision member 26 .
  • the rotational energy of the energy storage lever assembly 2 during the energy release process is strengthened once. Therefore, the structure can effectively prevent the vicious collision of the cam assembly 1, and can transfer the energy of the rotation of the cam assembly 1 to the energy storage lever assembly 2, thereby improving the energy utilization rate of the operating mechanism.
  • the impact member 26 in the above-mentioned embodiment, it may be a separate part, or it may be integrally formed with other parts of the energy storage lever assembly 2.
  • the impact member 26 is formed by the lever plate.
  • the bump 21 is bent or the impact member 26 is a stamped protrusion, which is not limited to the above-mentioned examples. As long as the requirements of the present invention are met, any form of the impact member 26 should belong to the protection scope of the present invention.
  • the shape of the collision piece 14 can be various, and in the above-mentioned embodiment, it is a sheet shape.
  • the collision piece 14 may be fixed between the pair of first cam pieces 11 by the positioning shaft 15 described in the above embodiment.
  • the simpler collision piece 14 can be directly fixed on the camshaft 13, or a combination of the two can be used to improve the fixing effect of the collision piece 14, so as to better receive the impact.
  • the camshaft 13 is driven to rotate by an external force.
  • the external force refers to that the operator drives the camshaft 13 by operating a handle, or drives the camshaft 13 by an electric operating mechanism.
  • the cam assembly 1 fixed on it also rotates along with it.
  • the cam assembly 1 rotates clockwise, the outer edge of the first cam piece 11 contacts the pushing shaft 25 and drives the pushing shaft 25 to swing, so that the The stored energy storage lever assembly 2 rotates counterclockwise.
  • the spring assembly 3 is compressed. until the state of FIG. 6 is entered. Finally, the closing lever locks the cam assembly 1 in the stored state.
  • the above process is the energy storage process of the operating mechanism.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

La présente invention concerne le domaine technique des dispositifs électriques basse tension. Un mécanisme d'actionnement pour un disjoncteur est décrit. Le mécanisme d'actionnement pour un disjoncteur comprend : une paire de panneaux latéraux positionnés face à face ; un ensemble came et un ensemble levier de stockage d'énergie qui sont disposés de manière rotative entre la paire de panneaux latéraux ; et un ensemble ressort situé entre la paire de panneaux latéraux. L'ensemble came comprend un ensemble de bossages de came et un arbre à cames. L'arbre à cames est disposé de manière rotative entre la paire de panneaux latéraux. L'ensemble de bossages de came est fixé au niveau de l'arbre à cames. Le mécanisme d'actionnement est caractérisé en ce que : l'ensemble came comprend en outre un élément de frappe tournant de manière synchrone avec l'ensemble de bossages de came ; l'ensemble levier de stockage d'énergie est pourvu d'un élément frappé, et pendant un processus de libération d'énergie, l'ensemble ressort amène l'ensemble came à tourner et amène l'ensemble levier de stockage d'énergie à tourner ; et lorsque l'ensemble came tourne, l'élément de frappe tourne et frappe l'élément frappé, et l'élément de frappe applique à l'élément frappé un couple dans une direction compatible avec une direction de rotation de l'ensemble levier de stockage d'énergie pendant un processus de fermeture. L'agencement ci-dessus peut empêcher efficacement une rotation excessive d'un ensemble came, et transférer l'énergie générée par la rotation de l'ensemble came à un ensemble levier de stockage d'énergie, ce qui permet d'augmenter le taux d'utilisation d'énergie d'un mécanisme d'actionnement.
PCT/CN2020/135682 2020-09-28 2020-12-11 Mécanisme d'actionnement pour disjoncteur WO2022062207A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202011038741.0 2020-09-28
CN202011038741.0A CN112071718A (zh) 2020-09-28 2020-09-28 一种断路器的操作机构

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WO2022062207A1 true WO2022062207A1 (fr) 2022-03-31

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5973278A (en) * 1998-05-07 1999-10-26 Eaton Corporation Snap acting charge/discharge and open/closed indicators displaying states of electrical switching apparatus
CN102522232A (zh) * 2011-12-13 2012-06-27 常熟开关制造有限公司(原常熟开关厂） 断路器操作机构
CN106960756A (zh) * 2017-04-01 2017-07-18 中国南方电网有限责任公司超高压输电公司检修试验中心 防止弹簧操作机构凸轮反打的方法及实现该方法的装置
CN207542163U (zh) * 2017-11-28 2018-06-26 常熟开关制造有限公司(原常熟开关厂） 一种断路器操作机构
CN209328821U (zh) * 2019-03-19 2019-08-30 常熟开关制造有限公司(原常熟开关厂） 一种断路器操作机构
CN210489567U (zh) * 2019-09-30 2020-05-08 上海良信电器股份有限公司 一种断路器操作机构的凸轮缓冲结构
CN212277131U (zh) * 2020-09-28 2021-01-01 常熟开关制造有限公司(原常熟开关厂） 一种断路器的操作机构

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5973278A (en) * 1998-05-07 1999-10-26 Eaton Corporation Snap acting charge/discharge and open/closed indicators displaying states of electrical switching apparatus
CN102522232A (zh) * 2011-12-13 2012-06-27 常熟开关制造有限公司(原常熟开关厂） 断路器操作机构
CN106960756A (zh) * 2017-04-01 2017-07-18 中国南方电网有限责任公司超高压输电公司检修试验中心 防止弹簧操作机构凸轮反打的方法及实现该方法的装置
CN207542163U (zh) * 2017-11-28 2018-06-26 常熟开关制造有限公司(原常熟开关厂） 一种断路器操作机构
CN209328821U (zh) * 2019-03-19 2019-08-30 常熟开关制造有限公司(原常熟开关厂） 一种断路器操作机构
CN210489567U (zh) * 2019-09-30 2020-05-08 上海良信电器股份有限公司 一种断路器操作机构的凸轮缓冲结构
CN212277131U (zh) * 2020-09-28 2021-01-01 常熟开关制造有限公司(原常熟开关厂） 一种断路器的操作机构

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