WO2011057574A1 - 热电磁式脱扣器及其跳扣机构 - Google Patents

热电磁式脱扣器及其跳扣机构 Download PDF

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Publication number
WO2011057574A1
WO2011057574A1 PCT/CN2010/078669 CN2010078669W WO2011057574A1 WO 2011057574 A1 WO2011057574 A1 WO 2011057574A1 CN 2010078669 W CN2010078669 W CN 2010078669W WO 2011057574 A1 WO2011057574 A1 WO 2011057574A1
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WO
WIPO (PCT)
Prior art keywords
trip
drawbar
jumper
circuit breaker
lap joint
Prior art date
Application number
PCT/CN2010/078669
Other languages
English (en)
French (fr)
Inventor
孙海涛
施俊昌
胡继伟
内侯·让-皮埃尔
昂格拉德·埃尔维
Original Assignee
施耐德电器工业公司
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Publication date
Application filed by 施耐德电器工业公司 filed Critical 施耐德电器工业公司
Publication of WO2011057574A1 publication Critical patent/WO2011057574A1/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/46—Automatic release mechanisms with or without manual release having means for operating auxiliary contacts additional to the main contacts
    • H01H71/462—Automatic release mechanisms with or without manual release having means for operating auxiliary contacts additional to the main contacts housed in a separate casing, juxtaposed to and having the same general contour as the main casing

Definitions

  • the present invention relates to a trip unit for a circuit breaker, and more particularly to a trip mechanism for a structurally simplified trip unit. Background technique
  • Molded case circuit breakers are widely used in medium and low voltage circuits to distribute electrical energy and protect lines, power supplies and electrical equipment.
  • the protection functions of molded case circuit breakers mainly include overload protection, short circuit protection, delay protection and leakage protection.
  • Circuit breakers that are traditional mechanical structures are generally based on thermal overload protection and short circuit protection.
  • the thermal overload protection device is usually realized by a bimetal and a current loop. When the temperature exceeds a certain threshold, the bimetal deforms to push the trip mechanism, so that the trip unit is tripped.
  • the short circuit protection is usually composed of a coil and an electromagnet. When the short circuit current exceeds a certain threshold, the electromagnet acts to push the trip mechanism and realize the trip of the lock.
  • a tripping mechanism is disclosed.
  • the tripping mechanism is composed of a drawbar, a first lock, a second lock,
  • the springs of the first and second latches, and the jumpers are respectively biased.
  • the first buckle supports the second buckle, and the first buckle is integrally assembled with the drawbar, and the jumper is caught by the second buckle.
  • the drawbar (the first lock) is pushed by the bimetal (or electromagnet) to rotate a certain angle, so that the support of the first lock to the second lock is released, and the second lock is released.
  • Rotating counterclockwise under the action of the energy storage spring causes the jumper to break away from the second buckle and rotate, causing the circuit breaker operating mechanism to trip.
  • the trip mechanism includes a drawbar and a lock member, and the drawbar includes at least one arm.
  • the trip mechanism further includes a lever member, one end of the lever member abuts the arm on the drawbar, and the other end is provided with a hook, and a first shaft is disposed between the lever member to surround the first shaft Turn. Also included is a first spring that biases the lever member such that the lever member abuts against the arm of the drawbar.
  • the trip mechanism further includes an energy storage member, the energy storage member is provided with a lock arm and a trigger arm, and is rotatable about a rotation shaft, and the end of the lock arm is hooked to the hook of the lever member, and A spring biasing the locking arm is provided such that the locking arm rests against the stop hook.
  • the traction rod rotates to push the lever member to rotate counterclockwise, so that the lock arm of the energy storage member is disengaged from the hook of the lever member, so that the energy storage member rotates under the action of the spring to push the lock member.
  • the lock member is rotated and tripped, so that the circuit breaker trips.
  • the rotary trip type is often used, that is, the components such as the jumper are triggered by rotation, so that the circuit breaker trips, and the rotation of these components needs to occupy a large space, which hinders
  • the entire circuit breaker is miniaturized.
  • the entire trip mechanism has a complicated structure including a plurality of parts, which also increases manufacturing costs and assembly costs. Summary of the invention
  • the present invention has been made. It is an object of the present invention to provide a structurally simplified trip mechanism that includes fewer parts and that the manner in which the jumper moves from a rotational mode to a linear motion mode reduces the space occupied by the tripping motion.
  • the circuit breaker can be further miniaturized.
  • a trip mechanism comprising: a jumper, a drawbar, an energy storage spring and a drawbar return spring that push the circuit breaker mechanism to trip, wherein the drawbar
  • the lap joint includes a lap joint, the lap joint directly overlaps the lap joint, and both are released when tripping.
  • the structure can be simplified, the number of parts can be reduced, and the manufacturing and assembly costs can be reduced.
  • the jumper when tripping, the jumper is released by translation to push the locking device of the circuit breaker mechanism.
  • the space required for the jumper movement is reduced, thereby reducing the overall size of the circuit breaker.
  • the drawbar further includes a plurality of arms for respectively connecting with the overload protection device and the short circuit protection device, and when overloaded, the traction bar is rotated by the rotation arm.
  • a plurality of protection devices such as an overload protection device and a short circuit protection device can share a trip mechanism.
  • the overlapping portion of the drawbar is stepped, and the overlapping end of the jumper is hook-shaped.
  • the trip mechanism further includes a bracket having a guiding chute for A jumper is slidably inserted into the guide chute and guided by the guide chute.
  • the bracket By setting the bracket, the jumper and the bracket can be assembled as a sub-assembly and then mounted on the trip unit housing. The entire trip unit can be mounted as a component on the circuit breaker, thereby completing the installation process.
  • FIGS. 1A and 1B respectively show views of a trip unit mounted in a circuit breaker housing from different angles;
  • FIG. 2 shows a perspective view of a trip unit employing a trip mechanism according to a preferred embodiment of the present invention;
  • FIGS. 3 and 2 Similarly, a perspective view of the trip unit is shown from another angle;
  • Figure 4 shows a perspective view of a drawbar of a trip mechanism according to the present invention
  • Figure 5 shows a perspective view of a jumper of a trip mechanism according to the present invention
  • Figure 6 shows a perspective view of a bracket of a trip mechanism according to the present invention
  • Figure 7 shows a perspective view of the bracket assembled with the jumper
  • Figure 8 shows a perspective view of the drawbar assembled with the jumper
  • 9A and 9B show the positional relationship of the drawbar and the jumper in the overlap position and the trip position in a side view.
  • the thermal magnetic trip unit 100 is disposed on a molded case circuit breaker, and is interchangeable, which is convenient for industrial production and meets the needs of different customers.
  • the thermomagnetic trip unit is housed in the circuit breaker housing 200, and as an assembly, can be integrally mounted to and detached from the circuit breaker housing 200 to Conducive to interchange.
  • the thermal magnetic trip unit 100 mainly comprises three systems, namely a trip mechanism, an overload protection device and a short circuit protection device.
  • the trip mechanism includes: a drawbar 10, a bracket 20, a jumper 30, an energy storage spring (not shown), and a drawbar return spring (not shown).
  • the drawbar 10 has a bore 12 in the middle thereof into which a shaft, not shown, is inserted, and both ends of the shaft engage the side plates of the trip unit housing 101 for the drawbar 10 can be rotated about the axis.
  • the drawbar return spring is fixedly coupled to the shaft, and one end of the twist arm of the return spring is caught on the drawbar 10, and the other end is caught in a slot (not shown) of the housing 101 so as to be in a predetermined direction (the present invention) In the clockwise direction, the drawbar 10 is biased.
  • a plurality of rotating arms 13 are also arranged on the lower side of the drawbar 10, and the rotating arms 13 are respectively engaged with the overload protection device and the short-circuit protection device, so as to be pushed by the overload protection device and the short-circuit protection device during overload or short circuit, thereby overloading
  • the protection device and the short circuit protection device can share a single trip mechanism.
  • a lap portion 1 1 is provided on one side of the drawbar 10, and as shown in Fig. 3, the lap portion 1 1 is in the form of a step as shown in FIG.
  • the jumper 30 is substantially an elongated rod having a substantially hook-shaped overlapping end 3 1 at one end and a substantially disk-shaped actuator portion 33 at the other end.
  • the actuator 33 pushes the trip unit. Tripping.
  • ribs 32 are provided on the body of the jumper rod to increase the strength of the entire jumper 30.
  • a bracket 20 is provided which is mounted on the top of the trip unit housing 101 and has a guide chute 21 for receiving the jumper 30, as shown in Figure 5.
  • the guide chute portion 21 is mounted across the drawbar 10 and has a passage therein for the jumper 30 to be inserted into the passage and to be guided to slide by the passage.
  • An energy storage spring (not shown) is disposed between the jumper 30 and the guide chute 21 to store the energy required for the jumper 30 to operate.
  • Figure 7 shows the relative positions of the jumper and the drawbar after assembly, with the bracket 20 and housing 101 omitted for clarity.
  • Figure 9A shows the drawbar and jumper in a lapped state. At this time, the overlapping end 3 1 of the jumper 30 is directly engaged with the overlapping portion 1 1 of the drawbar 10 to maintain the jumper 30 in the untriggered position.
  • the drawbar 10 is pushed and corrected along the reverse time (Article 91)
  • the needle is rotated, so that the overlapping portion 1 1 of the drawbar 10 leaves the overlapping portion 31 of the jumper 30, and the jumper 30 is released, and under the action of the energy storage spring, the jumper 30 is guided by the bracket in FIG. 9B.
  • the jumper 30 is pushed by the circuit breaker mechanism and slid in the left direction in FIG. 9B, at which time the drawbar 10 is biased in the clockwise direction by the drawbar return spring so as to be at the lap end of the jumper 30.
  • the drawbar 10 is reset to overlap the jumper 30.
  • the overlapping portion of the drawbar is stepped, a variety of other shapes may be employed to accomplish the same purpose.
  • the lap portion of the drawbar may be in the form of a protrusion that overlaps the lapped portion of the recessed form on the jumper, and vice versa.
  • the jumper 30 is provided with a rib 32 to increase the strength of the jumper 30.
  • the rib 32 can also serve as a guided portion of the jumper 30 to engage with a corresponding portion of the receiving portion of the bracket to achieve a jump.
  • the sliding guide of the buckle 30 can of course also employ various guiding structures commonly used in the art.
  • the specific position of the lap portion of the drawbar 10 can be changed depending on the overall design of the circuit breaker, and is not limited to the one shown in the drawings.

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  • Breakers (AREA)

Description

热电磁式脱扣器及其跳扣机构 技术领域
本发明涉及断路器的脱扣器， 并尤其涉及一种结构简化的脱扣器的跳扣 机构。 背景技术
塑壳断路器广泛应用于中低压电路中， 用于分配电能和保护线路、 电源 及用电设备。
塑壳断路器的保护功能主要有过载保护、 短路保护、 延时保护和漏电保 护等。 作为传统机械式结构的断路器一般以热过载保护和短路保护为主。 热 过载保护装置通常由双金属片和电流回路来实现， 在温度超过一定阈值时， 双金属片变形而推动跳扣机构， 使得脱扣器脱扣。 而短路保护通常由线圏和 电磁铁构成， 在短路电流超过一定阈值时， 电磁铁动作， 推动跳扣机构， 而 实现锁扣器脱扣。
目前有多种脱扣器的跳扣机构， 例如， 在中国发明专利申请第 200610041063.7号中公开了一种跳扣机构， 这种跳扣机构由牵引杆、 第一锁 扣、 第二锁扣、 分别偏压第一锁扣和第二锁扣的弹簧以及跳扣等构成。 在正 常工作的情况下， 第一锁扣支撑第二锁扣， 并且第一锁扣与牵引杆安装成一 体， 跳扣被第二锁扣卡住。 在脱扣器触发时， 牽引杆（第一锁扣）被双金属 片 （或电磁铁）推动而转动一定角度， 从而第一锁扣对第二锁扣的支撑作用 被解脱， 第二锁扣在储能弹簧的作用下逆时针转动， 致使跳扣从第二锁扣中 挣脱而转动， 促使断路器操作机构跳闸。
在中国发明专利申请第 200810207944.0号中， 公开了另一种脱扣机构， 其中该脱扣机构包括牵引杆和锁扣件， 所述牵引杆上至少包括一转臂。 该脱 扣机构还包括杠杆件， 杠杆件的一端与牵引杆上的转臂相抵靠， 另一端设有 挡钩， 在该杠杆件中间设有第一转轴， 以使得杠杆件围绕该第一转轴转动。 并且还包括第一弹簧， 该第一弹簧偏压所述杠杆件， 使得该杠杆件抵靠在牵 引杆的转臂上。 该脱扣机构还包括储能件， 储能件设有锁止臂和触发臂， 并 且可以围绕一转轴转动， 并且该锁止臂的端部与杠杆件的挡钩相挂接， 另外 设置有弹簧偏压所述锁止臂， 使得锁止臂靠在挡钩上。 在触发时， 牵引杆转 动， 可以推动杠杆件逆时针方向转动， 使得储能件的锁止臂从杠杆件的挡钩 中脱出， 从而储能件在弹簧的作用下转动而推动锁扣件， 使得锁扣件转动脱 扣， 从而断路器跳闸断开。
但是， 随着断路器小型化的要求越来越高， 也进而要求脱扣器部分的尺 寸减小并且结构简化。 而在目前的脱扣器中， 多采用旋转脱扣形式， 即， 其 中的跳扣等部件通过旋转来实现触发， 使得断路器跳闸， 而这些部件的旋转 需要占据较大的空间， 这就阻碍了整个断路器小型化。 另外， 整个脱扣机构 的结构复杂， 包括多个零件， 这也增加了制造成本和装配成本。 发明内容
因此， 为了解决上述问题， 提出了本发明。 本发明的目的在于提供一种 结构简化的脱扣机构， 该脱扣机构包括较少的零件， 并且跳扣的运动方式从 旋转方式转变成线性移动方式， 减小了脱扣运动所占据的空间， 从而可以使 得断路器更进一步小型化。
为了实现上述目的， 根据本发明， 提供了一种跳扣机构， 其包括： 推动 断路器机构解扣的跳扣、牵引杆、储能弹簧和牵引杆复位弹簧，其特征在于， 所述牵引杆包括搭接部分， 而所述跳扣包括搭接端， 所述搭接部分与所述搭 接端直接搭接， 并且在脱扣时二者解脱。
利用本发明的跳扣机构， 由于牵引杆直接与跳扣相搭接， 而省略了中间 的过渡元件， 可以简化结构， 减少零件数量， 从而降低制造和组装成本。
优选的是，在脱扣时，跳扣被平动释放， 来推动断路器机构的锁扣装置。 由此， 由于跳扣的运动为平动， 减小了跳扣运动所需要的空间， 进而减小了 断路器的整体尺寸。
优选的是， 所述牵引杆还包括多个转臂， 以便分别与过载保护装置和短 路保护装置相连接， 而在过载时， 通过所述转臂， 所述牵引杆被旋转。 利用 多个转臂， 可以使得过载保护装置和短路保护装置等多个保护装置共用一套 脱扣机构。
优选的是， 所述牵引杆的搭接部分为台阶状， 而所述跳扣的搭接端为钩 状。
优选的是， 所述跳扣机构还包括支架， 该支架具有导向滑槽， 以便所述 跳扣可滑动地插入到该导向滑槽中并由该导向滑槽导引。 通过设置支架， 可 以将跳扣与支架作为一个分组件组装之后再安装到脱扣器壳体上， 整个脱扣 器可以做为一个组件安装在断路器上， 从而筒化了安装过程。
下面将参照附图更进一步描述根据本发明的优选实施方式。 附图说明
本发明的上述和其他特征、 目的和优点可以从下面参照附图描述的本发 明的优选实施方式中理解到， 附图中：
图 1A和 1B从不同角度分别示出脱扣器安装在断路器壳体内的视图； 图 2示出采用根据本发明优选实施方式的跳扣机构的脱扣器的透视图； 图 3与图 2类似， 从另一角度示出脱扣器的透视图；
图 4示出根据本发明的跳扣机构的牵引杆的透视图；
图 5示出根据本发明的跳扣机构的跳扣的透视图；
图 6示出根据本发明的跳扣机构的支架的透视图；
图 7示出支架与跳扣组装在一起的透视图；
图 8示出牵引杆与跳扣组装在一起的透视图； 以及
图 9A和 9B 以侧视图示出处于搭接位置和脱扣位置的牵引杆和跳扣的 位置关系。 具体实施方式
下面参照附图描述根据本发明的优选实施方式。 要指出的是， 在下面的 描述中以及所附的权利要求书中， 一个元件与另一个元件相连接或相接合表 示一个元件与另一元件直接连接或接合，但也同时包括借助于中间元件相连 接或接合。 而表示一个元件与另一个元件直接连接或结合， 表示不存在中间 元件。 另外， 在下面描述中的各个方向如顺时针方向和逆时针方向为示例性 的， 而才艮据不同的应用环境， 可以予以改变。 并且， 下面描述的实施方式是 示例性的， 而不构成对本发明的限制。
如图 1A和 1B所示， 根据本发明的热磁脱扣器 100配置在塑壳断路器 上， 具有可互换性， 便于工业化生产和满足不同客户的需求。 如图 1A和 1B 所示， 所述热磁脱扣器容纳在断路器壳体 200内， 并且作为一个组件， 可以 整体安装到断路器壳体 200上以及从断路器本体 200上拆下， 以利于互换。 如图 2所示， 该热磁脱扣器 100主要包括三个系统， 即跳扣机构、 过载 保护装置和短路保护装置。 由于本发明的关键在于跳扣机构， 因此， 省略对 过载保护装置和短路保护装置的描述， 本领域技术人员可以理解到根据本发 明的跳扣机构可以与现有技术中的任何过载保护装置和短路保护装置相结 合使用。
根据本发明的跳扣机构包括： 牵引杆 10、 支架 20、 跳扣 30、 储能弹簧 (未示出）和牵引杆复位弹簧（未示出） 。 如图 1和图 3所示， 牵引杆 10 中部具有孔 12 , 未示出的轴插入到该孔 12中， 并且轴的两端与脱扣器壳体 101的侧板相接合， 以便牽引杆 10可以围绕轴转动。 另外， 牵引杆复位弹簧 固定连接在轴上， 该复位弹簧的扭臂的一端卡在牵引杆 10上， 另一端卡在 壳体 101的槽（未示出） 中， 以便在预定方向 （本发明中为顺时针方向）偏 压牵引杆 10。
在牵引杆 10的下侧还设置有多个转臂 13，该转臂 13分别与过载保护装 置和短路保护装置相接合， 以便在过载或短路时由过载保护装置和短路保护 装置推动， 从而过载保护装置和短路保护装置可以共用一个跳扣机构。
在牵引杆 10的一侧上设置有搭接部分 1 1， 如图 3所示， 该搭接部分 1 1 如图 3所示为台阶形式。
如图 4所示， 跳扣 30大致为细长形的杆， 一端具有大致钩形的搭接端 3 1 , 另一端设置有大致圆盘状的执行部分 33， 该执行部分 33推动脱扣器脱 扣。 另外， 在跳扣的杆的主体上设置有肋 32， 以提高整个跳扣 30的强度。
进一步参照图 5和图 6, 设置有支架 20， 该支架 20安装在脱扣器壳体 101的顶部， 该支架 20具有导向滑槽 21 , 以容纳跳扣 30, 如图 5所示。 该 导向滑槽部分 21跨过牵引杆 10安装， 并且其中具有通道， 以便跳扣 30插 入到该通道中， 并可以由该通道引导滑动。 在跳扣 30和导向滑槽 21之间设 置有储能弹簧（未示出） ， 以存储跳扣 30工作所需的能量。
图 7示出了在组装后跳扣和牵引杆的相对位置， 图中为了清楚起见省略 了支架 20和壳体 101。
下面参照图 .9A和 9B描述根据本发明优选实施方式的跳扣机构的工作 原理。 图 9A示出处于搭接状态下的牽引杆和跳扣。 此时， 跳扣 30的搭接端 3 1与牵引杆 10的搭接部分 1 1直接接合，以便将跳扣 30保持在未触发位置。
如图 9B所示， 在过载保护或短路保护时， 牵引杆 10被推动而沿着逆时 更正页（细则第 91条) 针方向转动， 从而牵引杆 10的搭接部分 1 1 离开跳扣 30的搭接部 31 , 跳扣 30被解脱， 进而在储能弹簧的作用下， 跳扣 30在支架的引导下在图 9B中 向右滑动， 进行推动断路器机构解扣， 切断故障电流， 此时断路器处于 OFF 位置。
在复位时， 跳扣 30被断路器机构推动并在图 9B中的向左方向滑动， 此 时， 牵引杆 10被牵引杆复位弹簧沿顺时针方向偏压， 从而在跳扣 30的搭接 端 31超过牵引杆 10的搭接部分 1 1时， 牵引杆 10复位而与跳扣 30搭接。
虽然在上面描述的实施方式中， 牵引杆的搭接部分为台阶状的， 但是， 可以采取多种其他形状来实现相同的目的。 例如， 牵引杆的搭接部分可以为 突出形式的， 而与跳扣上的凹陷形式的搭接部分相搭接， 反之依然。 跳扣 30 上设置有肋 32来提高跳扣 30的强度， 该肋 32同时也可以作为跳扣 30的被 导引部分， 以便与支架的容纳部分中的相对应部分相接合， 来实现对跳扣 30 的滑动导引， 当然也可以釆用本领域常用的各种引导结构。 牵引杆 10 的搭 接部分的具体位置可以根据断路器的整体设计予以改变， 而不局限于附图中 所示。
尽管上面参照附图描述了根据本发明的优选实施方式， 但是本领域技术 人员可以理解到在不背离本发明的范围和精髓的前提下， 可以在其中作出各 种修改和变化。 本发明的范围仅由所附的权利要求书限定。
更正页（细则第 91条）

Claims

权利要求
1. 一种跳扣机构， 其包括： 推动断路器机构解扣的跳扣（30)、 可转动 地安装在热磁脱扣器壳体（101 )上的牵引杆（10) 、 储能弹簧和牵引杆复 位弹簧， 其特征在于， 所述牵引杆（10) 包括搭接部分（11 ) , 而所述跳扣 包括搭接端（31 ) , 所述搭接部分与所述搭接端直接搭接， 并且在脱扣时二 者解脱。
2. 如权利要求 1所述的跳扣机构，其特征在于，在脱扣时，所述跳扣（ 30 ) 被储能弹簧平动释放， 来推动断路器机构的锁扣装置。
3. 如权利要求 1所述的跳扣机构， 其特征在于， 所述牵引杆（10)还包 括多个转臂 (13), 以便分别与过载保护装置和短路保护装置相接合。
4. 如权利要求 1到 3中任一项所述的跳扣机构，其特征在于，所述牵引 杆的搭接部分（11 )为台阶状， 而所述跳扣 （31 ) 的搭接端为钩状。
5. 如权利要求 1到 3中任一项所述的跳扣机构，其特征在于，所述跳扣 机构还包括支架 （20) , 该支架具有导向滑槽（21 ) , 以便所述跳扣 （30) 可滑动地插入到导向滑槽（21 ) 中并由该导向滑槽（21 )导引。
6. 一种脱扣器 （100) , 包括过载保护装置、 短路保护装置以及如权利 要求 1到 5中任一项所述的跳扣机构。
7. 一种断路器， 包括断路器壳体（200 )和作为一个组件可拆卸地安装 到该断路器壳体（200)上的如权利要求 6所述的脱扣器（100) 。
PCT/CN2010/078669 2009-11-12 2010-11-12 热电磁式脱扣器及其跳扣机构 WO2011057574A1 (zh)

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