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WO2016074321A1 - 断路器操作机构 - Google Patents

断路器操作机构 Download PDF

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Publication number
WO2016074321A1
WO2016074321A1 PCT/CN2014/094922 CN2014094922W WO2016074321A1 WO 2016074321 A1 WO2016074321 A1 WO 2016074321A1 CN 2014094922 W CN2014094922 W CN 2014094922W WO 2016074321 A1 WO2016074321 A1 WO 2016074321A1
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WO
WIPO (PCT)
Prior art keywords
bracket
circuit breaker
lock
movable contact
push rod
Prior art date
Application number
PCT/CN2014/094922
Other languages
English (en)
French (fr)
Inventor
黄燮云
Original Assignee
杭州泰姆电气有限公司
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 杭州泰姆电气有限公司 filed Critical 杭州泰姆电气有限公司
Publication of WO2016074321A1 publication Critical patent/WO2016074321A1/zh

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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
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/521—Details concerning the lever handle
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/522—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/528—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a toggle or collapsible link between handle and contact arm, e.g. sear pin mechanism

Definitions

  • the present invention relates to the field of circuit breaker technology, and more particularly to a circuit breaker operating mechanism.
  • a circuit breaker is a switching device that can close, carry and break current under normal circuit conditions and can close and carry current under the abnormal loop conditions within a specified time.
  • Circuit breakers can be used to distribute electrical energy, start asynchronous motors infrequently, protect power lines and motors, and cut off circuits when they are severely overloaded or short-circuited or under-voltage faults. Their functions are equivalent to fuse switches and A combination of under-heat relays, etc. Moreover, it is generally not necessary to change parts after breaking the fault current.
  • the breaking of the circuit breaker is achieved by manipulating the action of the structure.
  • common circuit breaker operating mechanisms are mostly composed of handles, locks, jumpers, moving contacts and other components.
  • the buckle is directly interlocked with the jump buckle.
  • the friction is large, and when the operating mechanism is operated, the friction occurs mostly at the metal-metal contact surface or the plastic and The contact surface of the plastic thus also causes a large friction. Due to friction and wear, ordinary circuit breakers can only be used 4,000 times, and a few long-life circuit breakers can only reach 10,000 times.
  • the existing circuit breaker operating mechanism includes various components in addition to the moving contact and the handle, and thus has a problem of complicated structure and low reliability.
  • an object of the present invention is to provide a circuit breaker operating mechanism, the circuit breaker operating machine
  • the structure can effectively solve the problem that the friction between the components of the operating mechanism of the circuit breaker tripping process is large, thereby making the circuit breaker have a short service life and poor reliability.
  • the present invention provides the following technical solutions:
  • a circuit breaker operating mechanism comprising a handle and a movable contact, further comprising:
  • a movable contact bracket fixedly connected to the movable contact at one end, and a bracket recess is formed at the other end of the movable contact bracket;
  • a handle push rod one end of the handle push rod is connected to the handle, and the other end is placed in the lock groove and the bracket groove, and the handle push rod slides in the lock groove and the bracket groove
  • the lock and the movable contact bracket can be rotated, and the notch groove and the bracket groove form a notch width smaller than a width of the handle push rod when the circuit breaker is closed.
  • the circuit breaker operating mechanism further includes a pull rod connected to the buckle at one end, and the other end of the pull rod is opposite to the bimetal of the circuit breaker.
  • the buckle is connected to the movable contact bracket through a pin shaft.
  • one side of the latching notch is provided with a boss.
  • the handle push rod has a circular cross section.
  • one end of the movable contact is provided with a circular hole
  • the movable contact bracket is provided with a boss that cooperates with the circular hole, and passes through the contact spring and the movable contact Fixed connection.
  • the inner wall of the notch of the locking groove is provided with a protrusion to block the handle push rod.
  • the circuit breaker operating mechanism further includes a lock return spring
  • the lock buckle is provided with a lock cavity
  • the lock return spring is disposed in the lock cavity, and the circuit breaker is closed.
  • the lock return spring is deformed to generate a force that causes the lock to rotate in the direction in which the breaker is disconnected.
  • the circuit breaker operating mechanism further includes a bracket return spring, and the movable contact bracket is provided with a bracket cavity, the bracket return spring is disposed in the bracket cavity, and the bracket is closed when the circuit breaker is closed The return spring is deformed to generate a rotation of the movable contact bracket toward the disconnection position of the circuit breaker Force.
  • the handle push rod is a metal rod
  • the lock and the movable contact bracket are plastic parts.
  • the circuit breaker operating mechanism comprises a handle, a movable contact, a lock, a movable contact bracket and a handle push rod.
  • one end of the handle push rod is connected with the handle, and the other end is placed in the lock groove of the lock buckle and the bracket groove of the movable contact bracket, and the handle push rod drives the lock and the movable contact when sliding in the groove
  • the bracket rotates, and the width of the notch formed by the locking groove and the bracket groove is reduced to be smaller than the width of the handle push rod when the circuit breaker is closed, and the movable contact is connected to the movable contact bracket, and the follower contact bracket Rotate together.
  • the handle push rod is placed in the lock groove of the lock and the bracket groove of the movable contact bracket under the action of external force.
  • One end of the groove slides in the groove and abuts against the inner wall of the groove, thereby pushing the lock and the movable contact bracket to rotate until the movable contact connected with the movable contact bracket contacts the static contact, and the circuit is turned on, and At this time, the width of the notch formed by the locking groove and the bracket groove is smaller than the width of the handle push rod.
  • the circuit breaker using the circuit breaker operating mechanism provided by the present invention can be used 20,000 times, which is a significant improvement compared with the conventional circuit breaker.
  • the circuit breaker operating mechanism provided by the present invention includes only two components of the lock and the movable contact bracket except for the movable contact and the handle, and the entire operating mechanism has fewer components, simple structure, and improved reliability.
  • the circuit breaker operating mechanism provided by the present invention further includes a pull rod connected at one end to the buckle, and the other end of the pull rod is abutted against the bimetal of the circuit breaker.
  • the bimetal will bend after being heated, and finally the lock and the movable contact bracket will be rotated to allow the circuit breaker to trip to achieve overload protection.
  • the circuit breaker operating mechanism of the present invention has a boss on one side of the latching notch.
  • the push rod abuts against the side wall of the boss to rotate it; on the other hand, the arrangement of the boss ensures the free trip function of the operating mechanism Now, at the same time, it is ensured that the handle push rod smoothly slides into the bracket groove of the contact bracket in the locking groove, that is, the operating mechanism can be quickly operated, and the strength of the locking groove is also improved.
  • the circuit breaker operating mechanism provided by the present invention has a handle push rod which is a metal piece, and the lock and the movable contact bracket are mostly plastic parts, and the friction between the metal and the plastic is also smaller than that of the metal and the metal. The friction between the plastic and the plastic, thereby reducing the wear and tear of the components during the breaking process of the circuit breaker and the service life of the extender.
  • FIG. 1 is a schematic exploded view of a circuit breaker operating mechanism according to an embodiment of the present invention
  • FIG. 2 is a schematic view showing the assembly of a circuit breaker operating mechanism according to an embodiment of the present invention
  • FIG. 3 is a schematic view showing the overall assembly of a circuit breaker in an open state of a circuit breaker operating mechanism according to an embodiment of the present invention
  • FIG. 4 is a schematic view showing the overall assembly of a circuit breaker in a closed state of a circuit breaker operating mechanism according to an embodiment of the present invention.
  • Base 1 handle 2, handle push rod 3, handle spring 4, moving contact bracket 5, lock 6, bracket return spring 7, pin 8, lock return spring 9, contact spring 10, moving contact 11 , the pull rod 12, the static contact 13, the bimetal 14, the locking boss 15.
  • the embodiment of the invention discloses a circuit breaker operating mechanism to reduce the friction between the components of the operating mechanism of the tripping process, thereby prolonging the service life of the circuit breaker and improving the reliability of the breaking process.
  • FIG. 1 is a schematic exploded view of a circuit breaker operating mechanism according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of assembly of a circuit breaker operating mechanism according to an embodiment of the present invention
  • FIG. 4 is a schematic view of the overall assembly of the circuit breaker in the closed state of the operating mechanism of the circuit breaker according to the embodiment of the present invention.
  • the circuit breaker operating mechanism provided by the invention comprises a handle 2, a handle push rod 3, a movable contact 11, a movable contact bracket 5 and a lock 6.
  • the handle 2 is fixedly mounted in the circuit breaker base 1 and can be fixed by a handle spring 4, and the handle 2 can be rotated to a certain extent along the axis.
  • the shape structure and the specific fixing manner of the handle 2 are referred to the prior art, and are not described herein again.
  • the handle push rod 3 is connected to the handle 2.
  • the handle 2 can be provided with a hole, and one end of the handle push rod 3 is inserted into the hole. When the handle 2 is rotated, the handle push rod 3 is moved.
  • the handle push rod 3 and the handle 2 can also be connected by other conventional connections, such as hinges.
  • the handle push rod 3 is usually a U-shaped rod, and of course other shapes can be used as long as it enables the transmission between the handle 2 and the lock 6 and the movable contact holder 5.
  • One end of the locking buckle 6 is provided with a locking groove
  • one end of the movable contact bracket 5 is provided with a bracket groove
  • the locking groove is matched with the bracket groove.
  • the other end of the handle push rod 3 is placed in the lock groove and the bracket groove.
  • the handle push rod 3 slides in the lock groove and the bracket groove with the rotation of the handle, and can be offset with the lock groove and the inner wall of the bracket groove when sliding to a certain extent, and further, with the further rotation of the handle 2,
  • the handle push rod 3 pushes the lock 6 and the movable contact holder 5 to rotate, so that the movable contact 11 is in contact with the fixed contact 13.
  • the notch groove and the bracket groove form a notch width that is smaller than the width of the handle push rod 3 to resist the handle push rod 3, thereby keeping the circuit breaker in a closed state.
  • the movable contact 11 is connected to the movable contact holder 5, and can be rotated together with the movable contact holder 5 so as to be in contact with or separated from the fixed contact 13 to turn on or off the circuit to achieve the purpose of breaking.
  • the handle push rod 3 slides under the action of the external force, and the handle push rod 3 further drives the lock 6 and the movable contact bracket 5 to rotate until the movable contact bracket 5
  • the connected moving contact 11 is in contact with the fixed contact 13 to turn on the circuit. Due to the lock 6 during the rotation
  • the rotation amplitude of the movable contact bracket 5 is different, and thus the notch formed by the locking groove and the bracket groove is gradually reduced with the rotation of the two, and when the movable contact 11 is rotated to the closed position, the width of the notch is smaller than The width of the handle push rod 3, thereby holding the handle push rod 3 in the groove formed by the two, keeps the circuit breaker in a closed state.
  • the latch 6 When the circuit breaker is tripped, that is, from the closed state to the disconnected state, the latch 6 is first disengaged, and the locking groove and the bracket groove are released from the limit of the handle push rod 3, and the latch 6 and the movable contact The head holder 5 is rotated, and the movable contact 11 is separated from the fixed contact 13.
  • the circuit breaker operating mechanism provided by the present invention further includes a tie rod 12.
  • One end of the tie rod 12 is connected to the striker 6, and the other end is abutted against the bimetal 14 of the circuit breaker.
  • the tie rod 12 may be U-shaped or may have a shape such as an L-shape that can withstand the bimetal. Therefore, when an overload occurs, the bimetal 14 is thermally deformed, the pull rod 12 is actuated, and the pull rod 12 is connected with the buckle 6 to drive the lock 6 to act, and tripping occurs to realize overload protection.
  • the movable contact holder 5 and the lock 6 are connected by the pin 8.
  • the handle push rod 3 rotates with the handle
  • the movable contact bracket 5 and the lock 6 are rotated around the pin shaft 8.
  • the two can also adopt other positioning methods, such as forming a groove on the base 1, rotating the movable contact bracket 5 and the latch 6 along the groove, etc., so that only the rotating movable contact 11 with the two can be
  • the static contacts 13 are in contact to realize the closing of the circuit breaker.
  • a boss may be disposed on one side of the latching notch.
  • the push rod abuts against the side wall of the boss to rotate it; on the other hand, the setting of the boss ensures the realization of the free trip function of the operating mechanism, and at the same time ensures the handle
  • the push rod smoothly slides into the bracket groove of the contact bracket in the locking groove, which ensures that the operating mechanism can move quickly and the strength of the locking groove is also improved.
  • the locking groove and the bracket groove can better block the handle push rod 3 in the groove to keep the circuit breaker normally closed, and the inner side of the locking groove can be further convex.
  • the notch formed by the protrusion and the bracket groove is smaller than the width of the handle push rod 3, and thus the handle push rod 3 is just locked in the groove.
  • the shape and position of the protrusion depend on the position of the handle push rod 3.
  • the protrusion can also be disposed on the inner side of the bracket groove, and the handle push rod 3 can also be blocked.
  • the handle push rod 3 has a circular cross section, so that the friction between the handle push rod 3 and the lock 6 and the movable contact bracket 5 is small, and the handle is relatively labor-saving. Easy to operate.
  • the cross section of the handle push rod 3 can also be set to an ellipse or other shape, and only needs to be brought into line contact when the lock 6 and the movable contact holder 5 are rotated.
  • the specific handle push rod 3 may be a metal rod, and the corresponding lock 6 and the movable contact holder 5 may be plastic parts. Since the friction between the metal and plastic contact surface is less than the friction between the metal and the metal or between the plastic and the plastic, the friction between the components of the operating mechanism of the breaking process is further reduced, and the service life is prolonged.
  • the movable contact 11 of the present invention is connected to the movable contact holder 5, and specifically, a circular hole can be formed at one end of the movable contact 11, and the movable contact holder 5 is provided with a boss corresponding to the circular hole, and the movable contact 11
  • the movable contact holder 5 is fixedly connected by the contact spring 10.
  • the contact spring 10 is arranged to provide contact pressure for the movable contact 11. After the circuit breaker is closed, if the static contact 13 is removed, the movable contact 11 can continue to rotate forward to realize overtravel.
  • the structure of connecting the movable contact 11 and the movable contact holder 5 through the contact spring 10 is simpler, and is convenient for manufacturing and installation.
  • the movable contact 11 can also be connected to the movable contact holder 5 by means of hinge or other conventional manner, so that it can rotate according to the rotation of the movable contact holder 5.
  • the present invention further includes a bracket return spring 7.
  • a bracket cavity is further formed on the movable contact bracket 5 for placing the bracket return spring 7.
  • the bracket return spring 7 is deformed, and a force is generated to rotate the movable contact bracket 5 in the direction in which the breaker is disconnected.
  • a bracket spring groove can be formed on the movable contact bracket 5, and the base of the circuit breaker 1 is provided with a base spring boss.
  • One end of the bracket return spring 7 abuts in the bracket spring groove, and the other end abuts Base spring boss.
  • bracket return spring 7 When the circuit breaker is in the closed state, the bracket return spring 7 is deformed to generate a force that causes the movable contact holder 5 to rotate in the disconnection direction of the circuit breaker.
  • the bracket return spring 7 can also be installed by other methods in the prior art, and the specific form is not limited in the present invention.
  • the present invention also includes a lock return spring 9.
  • the lock ring 6 further defines a lock cavity for placing the lock return spring 9.
  • the lock return spring 9 is deformed to generate the lock 6 to the circuit breaker. Disengage the force in the direction of the position.
  • a bracket spring boss can be disposed on the movable contact bracket 5, and one end of the lock return spring 9 abuts against the bracket spring boss, and the other end abuts against the inner wall of the latch cavity.
  • the lock The buckle return spring 9 is deformed to generate a force that causes the striker 6 to rotate in the disconnection direction of the circuit breaker.
  • the lock return spring 9 can also be installed by other means in the prior art, and the specific form thereof is not limited in the present invention.
  • bracket return spring 7 and the lock return spring 9 The function of the bracket return spring 7 and the lock return spring 9 is mainly to provide a certain power for the tripping process of the circuit breaker.

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Abstract

一种断路器操作机构，包括手柄（2）、动触头（11），进一步包括一端开设有锁扣凹槽的锁扣（6）；一端与动触头（11）固定连接的动触头支架（5），动触头支架（5）的另一端开设有支架凹槽；手柄推杆（3），手柄推杆（3）的一端与手柄（2）连接，另一端置于锁扣凹槽和支架凹槽中，手柄推杆（3）在锁扣凹槽和支架凹槽内滑动时能够带动锁扣（6）和动触头支架（5）旋转，且该断路器闭合时锁扣凹槽和支架凹槽构成的槽口宽度小于手柄推杆（3）的宽度。断路器操作机构在断开或闭合过程中，手柄推杆与锁扣及动触头支架之间均为线接触，摩擦力较小，从而延长了断路器的使用寿命、提高其分断过程的可靠性。

Description

断路器操作机构
本申请要求于2014年11月13日提交中国专利局、申请号为201410641431.6、发明名称为“断路器操作机构”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及断路器技术领域，更具体地说，涉及一种断路器操作机构。
背景技术
断路器是指能够关合、承载和开断正常回路条件下的电流并能关合、在规定的时间内承载和开断异常回路条件下的电流的开关装置。断路器可用来分配电能，不频繁地启动异步电动机，对电源线路及电动机等实行保护，当它们发生严重的过载或者短路及欠压等故障时能切断电路，其功能相当于熔断器式开关与过欠热继电器等的组合。而且在分断故障电流后一般不需要变更零部件。
断路器的分断通过操纵结构的动作来实现。目前，常见的断路器操作机构多由手柄、锁扣、跳扣、动触头等零部件组成。通常，锁扣直接与跳扣相扣，脱扣时，由于锁扣与跳扣多为面接触，摩擦力较大，且操作机构动作时，摩擦多发生于金属与金属的接触面或塑料与塑料的接触面，由此同样引起较大的摩擦力。由于受摩擦磨损，普通的断路器一般只能使用4000次，少数使用寿命较长的断路器也只能达到1万次。
另外，现有的断路器操作机构除动触头与手柄外，还包括各个零部件，因而存在结构复杂且可靠性较低的问题。
综上所述，如何有效地解决断路器脱扣过程操作机构各部件间摩擦力较大，从而使得断路器使用寿命较短、可靠性较差等问题，是目前本领域技术人员急需解决的问题。
发明内容
有鉴于此，本发明的目的在于提供一种断路器操作机构，该断路器操作机 构可以有效地解决断路器脱扣过程操作机构各部件间摩擦力较大，从而使得断路器使用寿命较短、可靠性较差等问题。
为了达到上述目的，本发明提供如下技术方案：
一种断路器操作机构，包括手柄、动触头，进一步包括：
一端开设有锁扣凹槽的锁扣；
一端与所述动触头固定连接的动触头支架，所述动触头支架的另一端开设有支架凹槽；
手柄推杆，所述手柄推杆的一端与所述手柄连接，另一端置于所述锁扣凹槽和支架凹槽中，所述手柄推杆在锁扣凹槽和支架凹槽内滑动时能够带动所述锁扣和所述动触头支架旋转，且该断路器闭合时所述锁扣凹槽和所述支架凹槽构成的槽口宽度小于手柄推杆的宽度。
优选地，上述断路器操作机构中，进一步包括一端与锁扣连接的拉杆，所述拉杆的另一端与该断路器的双金属片相抵。
优选地，上述断路器操作机构中，所述锁扣与所述动触头支架通过销轴连接。
优选地，上述断路器操作机构中，所述锁扣槽口的一侧设有凸台。
优选地，上述断路器操作机构中，所述手柄推杆的截面为圆形。
优选地，上述断路器操作机构中，所述动触头的一端开设有圆孔，所述动触头支架上设置有与所述圆孔配合的凸台，且通过触头弹簧与动触头固定连接。
优选地，上述断路器操作机构中，所述锁扣凹槽的槽口内壁设有凸起，以卡阻手柄推杆。
优选地，上述断路器操作机构中，进一步包括锁扣复位弹簧，且所述锁扣开设有锁扣腔体，所述锁扣复位弹簧置于所述锁扣腔体中，断路器闭合时所述锁扣复位弹簧发生变形，产生使锁扣向断路器断开位置方向转动的力。
优选地，上述断路器操作机构中，进一步包括支架复位弹簧，且所述动触头支架开设有支架腔体，所述支架复位弹簧置于所述支架腔体中，断路器闭合时所述支架复位弹簧发生变形，产生使动触头支架向断路器断开位置方向转动 的力。
优选地，上述断路器操作机构中，所述手柄推杆为金属杆，所述锁扣与所述动触头支架为塑料件。
本发明提供的断路器操作机构包括手柄、动触头、锁扣、动触头支架和手柄推杆。其中，手柄推杆的一端与手柄连接，另一端置于锁扣的锁扣凹槽和动触头支架的支架凹槽内，手柄推杆在上述凹槽内滑动时带动锁扣与动触头支架旋转，且锁扣凹槽与支架凹槽共同构成的槽口宽度在该断路器闭合时减小至小于手柄推杆的宽度，动触头连接于动触头支架上，随动触头支架一起旋转。
应用本发明提供的断路器操作机构，将断路器由断开状态切换到闭合状态时，在外力作用下，手柄推杆置于锁扣的锁扣凹槽和动触头支架的支架凹槽内的一端会在凹槽内滑动并与凹槽内壁相抵，进而推动锁扣与动触头支架旋转，直至与动触头支架相连接的动触头与静触头相接触，接通电路，且此时锁扣凹槽与支架凹槽所形成的槽口宽度小于手柄推杆的宽度。断路器由闭合状态切换到断开状态时，动触头与静触头分离，锁扣与动触头支架旋转。在上述断开或闭合时，锁扣与动触头支架旋转的过程中，手柄推杆与锁扣和动触头支架之间产生摩擦，而手柄推杆与锁扣及动触头支架之间均为线接触，进而摩擦力较小，延长了其使用寿命。通常情况下，应用本发明提供的断路器操作机构的断路器可以使用2万次，较之普通的断路器一般只能使用4000次有着显著的提高。
同时，本发明提供的断路器操作机构，除动触头与手柄外仅包括锁扣与动触头支架两个部件，整个操作机构的零部件较少，结构简单，进而可靠性提高。
在一种优选的实施方式中，本发明提供的断路器操作机构进一步包括一端与锁扣连接的拉杆，拉杆的另一端与该断路器的双金属片相抵。双金属片受热后会发生弯曲，并最终触动锁扣与动触头支架旋转，让断路器跳闸，实现过载保护。
在另一种优选的实施方式中，本发明提供的断路器操作机构，其锁扣槽口的一侧设有凸台。一方面，在手柄推杆带动锁扣旋转过程中，推杆与凸台侧壁相抵以使其转动；另一方面，凸台的设置可以确保操作机构自由脱扣功能的实 现，并同时保证手柄推杆在锁扣凹槽内顺利地滑动到触头支架的支架凹槽，即保证了操作机构能快速动作，也提高了锁扣凹槽的强度。
在另一种优选的实施方式中，本发明提供的断路器操作机构其手柄推杆为金属件，锁扣及动触头支架多为塑料件，金属与塑料间的摩擦亦小于金属与金属及塑料与塑料间的摩擦，从而减小断路器分断过程中零部件的磨损，延长器使用寿命。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明实施例提供的断路器操作机构的爆炸示意图；
图2为本发明实施例提供的断路器操作机构的装配示意图；
图3为本发明实施例提供的断路器操作机构断开状态的断路器总装配示意图；
图4为本发明实施例提供的断路器操作机构闭合状态的断路器总装配示意图。
附图中标记如下：
基座1，手柄2，手柄推杆3，手柄弹簧4，动触头支架5，锁扣6，支架复位弹簧7，销轴8，锁扣复位弹簧9，触头弹簧10，动触头11，拉杆12，静触头13，双金属片14，锁扣凸台15。
具体实施方式
本发明实施例公开了一种断路器操作机构，以减小脱扣过程操作机构各部件间的摩擦力，从而延长断路器的使用寿命、提高其分断过程的可靠性。
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是 全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
请参阅图1-图4，图1为本发明实施例提供的断路器操作机构的爆炸示意图；图2为本发明实施例提供的断路器操作机构的装配示意图；图3为本发明实施例提供的断路器操作机构断开状态的断路器总装配示意图；图4为本发明实施例提供的断路器操作机构闭合状态的断路器总装配示意图。
本发明提供的断路器操作机构，包括手柄2、手柄推杆3、动触头11、动触头支架5和锁扣6。
其中，手柄2固定安装于断路器基座1内，具体的可以通过手柄弹簧4固定，手柄2可沿轴一定程度的转动。手柄2的形状结构及具体固定方式等参考现有技术，此处不再赘述。
手柄推杆3的一端与手柄2连接，具体的，手柄2上可开设有孔，手柄推杆3的一端插入上述孔内。当手柄2转动时，带动手柄推杆3运动。当然，手柄推杆3与手柄2也可采用其他常规的连接方式连接，如铰接等。手柄推杆3通常为U型杆，当然也可采用其他形状，只需使其能够实现手柄2到锁扣6与动触头支架5之间的传动即可。
锁扣6的一端开设有锁扣凹槽，动触头支架5的一端开设有支架凹槽，锁扣凹槽与支架凹槽相配合。手柄推杆3的另一端置于锁扣凹槽与支架凹槽当中。手柄推杆3随手柄的转动在锁扣凹槽与支架凹槽内发生滑动，且当滑动至一定程度时能够与锁扣凹槽与支架凹槽的内壁相抵，进而随手柄2的进一步转动，手柄推杆3推动锁扣6与动触头支架5旋转，以使动触头11与静触头13相接触。当断路器处于闭合状态时，锁扣凹槽和支架凹槽构成的槽口宽度减小至小于手柄推杆3的宽度，以卡阻手柄推杆3，进而将断路器保持在闭合状态。
动触头11连接于动触头支架5上，可随动触头支架5一起旋转，从而能够与静触头13接触或分离以接通或切断电路，达到分断目的。
具体的，断路器由断开状态切换到闭合状态过程时，在外力作用下手柄推杆3滑动，手柄推杆3进一步带动锁扣6与动触头支架5旋转，直至与动触头支架5相连接的动触头11与静触头13相接触，接通电路。由于在旋转过程中锁扣6 与动触头支架5的旋转幅度不同，进而锁扣凹槽与支架凹槽所形成的槽口随二者的旋转逐渐减小，当动触头11旋转至闭合位置时，槽口的宽度小于手柄推杆3的宽度，从而将手柄推杆3卡阻在二者形成的凹槽内，使断路器保持在闭合状态。
当断路器脱扣时，也即由闭合状态切换到断开状态，锁扣6首先脱开，解除锁扣凹槽与支架凹槽对手柄推杆3的限位作用，锁扣6与动触头支架5旋转，动触头11与静触头13分离。
为了进一步优化上述技术方案，本发明提供的断路器操作机构进一步包括拉杆12。拉杆12的一端与锁扣6连接，另一端与断路器的双金属片14相抵。拉杆12可以呈U型，也可以为L型等其他能够与双金属片相抵的形状。以使得当发生过载时，双金属片14受热变形，带动拉杆12动作，又拉杆12与锁扣6连接，带动锁扣6动作，发生脱扣，实现过载保护。
为了便于安装及分断操作，动触头支架5与锁扣6通过销轴8连接。手柄推杆3随手柄转动时，带动动触头支架5与锁扣6绕销轴8旋转。当然，二者也可采用其他定位方式，如在基座1上开设凹槽，动触头支架5与锁扣6沿凹槽转动等，只需使随二者的旋转动触头11能够与静触头13接触，实现断路器闭合。
进一步地，锁扣槽口的一侧可以设置凸台。一方面，在手柄推杆带动锁扣旋转过程中，推杆与凸台侧壁相抵以使其转动；另一方面，凸台的设置可以确保操作机构自由脱扣功能的实现，并同时保证手柄推杆在锁扣凹槽内顺利地滑动到触头支架的支架凹槽，即保证了操作机构能快速动作，也提高了锁扣凹槽的强度。
为使断路器闭合时，锁扣凹槽与支架凹槽能够更好的将手柄推杆3卡阻在凹槽内，以保持断路器正常闭合状态，锁扣凹槽的内侧面可进一步设置凸起。断路器闭合状态时，上述凸起与支架凹槽形成的槽口小于手柄推杆3的宽度，因而手柄推杆3正好被卡阻于凹槽内。凸起的形状及位置根据手柄推杆3的位置而定，当然，上述凸起也可以设置在支架凹槽的内侧面，同样可以卡阻手柄推杆3。
在本发明一具体实施例中，手柄推杆3的截面为圆形，以使手柄推杆3与锁扣6和动触头支架5间的摩擦力较小，进而推动手柄动作时较为省力，方便操作。手柄推杆3的截面也可以设置为椭圆或其他形状，只需使其带动锁扣6和动触头支架5转动时为线接触。具体的手柄推杆3可以为金属杆，相应的锁扣6和动触头支架5可以为塑料件。由于金属与塑料接触面的摩擦力小于金属与金属或塑料与塑料间的摩擦力，从而进一步减小了分断过程操作机构各部件间的摩擦，延长了其使用寿命。
本发明的动触头11与动触头支架5连接，具体的可以在动触头11的一端开设圆孔，动触头支架5上设置与该圆孔相配合的凸台，动触头11与动触头支架5通过触头弹簧10固定连接。触头弹簧10的设置可以为动触头11提供触头压力，断路器闭合后，若将静触头13移开，动触头11能够继续向前转动，实现超程。且相较于其他实现超程的机构，通过触头弹簧10连接动触头11与动触头支架5的结构更为简单，便于制造加工及安装。当然，动触头11也可采用铰接或其他常规的方式与动触头支架5连接，使其能够随动触头支架5的转动而转动。
为了使断路器脱扣过程更为可靠、省力，本发明进一步包括支架复位弹簧7。而为了便于支架复位弹簧7的安装，动触头支架5上进一步开设支架腔体，用于放置支架复位弹簧7。断路器闭合时支架复位弹簧7发生变形，产生使动触头支架5向断路器断开位置方向转动的力。具体的，可以在动触头支架5上开设支架弹簧凹槽，且断路器基座1上设有基座弹簧凸台，支架复位弹簧7的一端抵在支架弹簧凹槽中，另一端抵在基座弹簧凸台上。当断路器处于闭合状态时，支架复位弹簧7发生变形，产生使动触头支架5向断路器断开方向转动的力。当然，支架复位弹簧7也可以通过其他现有技术中的方式进行安装，其具体形式本发明不做限定。
同样，进一步地，本发明还包括锁扣复位弹簧9。为了便于锁扣复位弹簧9的安装，锁扣6上进一步开设锁扣腔体，用于放置锁扣复位弹簧9，断路器闭合时锁扣复位弹簧9发生变形，产生使锁扣6向断路器断开位置方向转动的力。具体的，可以在动触头支架5上设置支架弹簧凸台，锁扣复位弹簧9的一端抵在支架弹簧凸台上，另一端抵在锁扣腔体的内壁上。当断路器处于闭合状态时，锁 扣复位弹簧9发生变形，产生使锁扣6向断路器断开方向转动的力。当然，锁扣复位弹簧9也可以通过其他现有技术中的方式进行安装，其具体形式本发明不做限定。
支架复位弹簧7与锁扣复位弹簧9的作用主要为断路器的脱扣过程提供一定动力。当然，也可以采用其他在断路器闭合时产生使锁扣6或动触头支架5向断开方向转动的弹性件或其他方式实现脱扣，并不局限于复位弹簧。当断路器闭合时，由于锁扣凹槽与支架凹槽所形成的槽口，其宽度小于手柄推杆3的宽度，而支架复位弹簧7与锁扣复位弹簧9作用于动触头支架5与锁扣6的使其向断路器断开方向转动的力又不足以使二者发生旋转，故锁扣凹槽与支架凹槽将手柄推杆3卡阻于凹槽内，保持断路器的闭合状态。当发生过载或过流时，锁扣6脱开，解除锁扣凹槽与支架凹槽对手柄推杆3的限位作用，进而在支架复位弹簧7与锁扣复位弹簧9作用下带动锁扣6与动触头支架5旋转，直至动触头支架5与锁扣6恢复至断路器断开的位置。
本说明书中各个实施例采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似部分互相参见即可。
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下，在其它实施例中实现。因此，本发明将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。

Claims (10)

  1. 一种断路器操作机构，包括手柄(2)、动触头(11)，其特征在于，进一步包括：
    一端开设有锁扣凹槽的锁扣(6)；
    一端与所述动触头(11)固定连接的动触头支架(5)，所述动触头支架(5)的另一端开设有支架凹槽；
    手柄推杆(3)，所述手柄推杆(3)的一端与所述手柄(2)连接，另一端置于所述锁扣凹槽和所述支架凹槽中，所述手柄推杆(3)在所述锁扣凹槽和所述支架凹槽内滑动时能够带动所述锁扣(6)和所述动触头支架(5)旋转，且该断路器闭合时所述锁扣凹槽和所述支架凹槽构成的槽口宽度小于所述手柄推杆(3)的宽度。
  2. 根据权利要求1所述的断路器操作机构，其特征在于，进一步包括一端与所述锁扣(6)连接的拉杆(12)，所述拉杆(12)的另一端与该断路器的双金属片(14)相抵。
  3. 根据权利要求1所述的断路器操作机构，其特征在于，所述锁扣(6)与所述动触头支架(5)通过销轴(8)连接。
  4. 根据权利要求1-3任一项所述的断路器操作机构，其特征在于，所述锁扣槽口的一侧设有锁扣凸台(15)。
  5. 根据权利要求1所述的断路器操作机构，其特征在于，所述手柄推杆(3)的截面为圆形。
  6. 根据权利要求1所述的断路器操作机构，其特征在于，所述动触头(11)的一端开设有圆孔，所述动触头支架上(5)设置有与所述圆孔配合的凸台，且通过触头弹簧(10)与所述动触头(11)固定连接。
  7. 根据权利要求1所述的断路器操作机构，其特征在于，所述锁扣凹槽的槽口内壁设有凸起，以卡阻所述手柄推杆(3)。
  8. 根据权利要求1所述的断路器操作机构，其特征在于，进一步包括锁扣复位弹簧(9)，且所述锁扣(6)开设有锁扣腔体，所述锁扣复位弹簧(9) 置于所述锁扣腔体中，断路器闭合时所述锁扣复位弹簧(9)发生变形，产生使锁扣(6)向断路器断开位置方向转动的力。
  9. 根据权利要求1所述的断路器操作机构，其特征在于，进一步包括支架复位弹簧(7)，且所述动触头支架(5)开设有支架腔体，所述支架复位弹簧(7)置于所述支架腔体中，断路器闭合时所述支架复位弹簧(7)发生变形，产生使动触头支架(5)向断路器断开位置方向转动的力。
  10. 根据权利要求1所述的断路器操作机构，其特征在于，所述手柄推杆(3)为金属杆，所述锁扣(6)与所述动触头支架(5)为塑料件。
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