WO2009018729A1 - Moving contact of circuit breaker - Google Patents

Moving contact of circuit breaker Download PDF

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Publication number
WO2009018729A1
WO2009018729A1 PCT/CN2008/070873 CN2008070873W WO2009018729A1 WO 2009018729 A1 WO2009018729 A1 WO 2009018729A1 CN 2008070873 W CN2008070873 W CN 2008070873W WO 2009018729 A1 WO2009018729 A1 WO 2009018729A1
Authority
WO
WIPO (PCT)
Prior art keywords
fixed
circuit breaker
pair
parallel
conductors
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2008/070873
Other languages
English (en)
French (fr)
Inventor
Mingchen Zhou
Ruiliang Guan
Xiaofeng Yu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Changshu Switchgear Manufacturing Co Ltd
Original Assignee
Changshu Switchgear Manufacturing Co Ltd
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 Changshu Switchgear Manufacturing Co Ltd filed Critical Changshu Switchgear Manufacturing Co Ltd
Priority to EP08734229.1A priority Critical patent/EP2187421B1/en
Publication of WO2009018729A1 publication Critical patent/WO2009018729A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H1/226—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars

Definitions

  • the invention relates to a movable contact of a circuit breaker, which is arranged in a movable contact cavity of a base of the circuit breaker and cooperates with the static contact to play a function of turning on and off the circuit, and belongs to the technical field of low-voltage electrical appliances. Background technique
  • the self-resistance of the circuit breaker conductor and the contact resistance between the static and dynamic contacts play an important role in the short-term withstand short-circuit current performance of the circuit breaker.
  • the larger the contact resistance of the electrical conductor or the contact resistance between the moving and stationary contacts the more likely the heat generated by the circuit breaker to withstand the short-circuit current increases, causing the contacts of the moving and stationary contacts (on the moving contacts). The movable contact and the static contact on the static contact) are melted and damaged.
  • the parallel contact piece of the moving contact (commonly referred to as the parallel conductor) and the slewing support shaft, and even the superb skill can not eliminate the aforementioned cooperation. Clearance, therefore, when the circuit breaker is at the end of the closing, the parallel conductor often exhibits a roll phenomenon, resulting in poor contact between the movable contact of the movable contact and the static contact, which increases the contact resistance in the prior art.
  • the structure of the movable contact of the circuit breaker is as shown in Fig. 4.
  • It comprises an insulating support 1, a pair of fixed plates 2, a grid of 3 sets of grids, a parallel conductor 6 of a group of at least three sets of slewing support shafts, and a flexible conductive Connecting wire 7 conductive block 8, the upper end of a pair of fixing plates 2 is fixed to both sides of the insulating support 1
  • the grid seat 3 is placed outside the group parallel body 6 and the fixed plate 2 fixed group grid 4 is arranged on the insulating support 1 and the near middle portion of the parallel parallel body 6 is positioned at two positions.
  • the other portion of the slewing support shaft 5 on the fixed plate 2 and the flexible electrical connection 7 of the flexible electrical connection line 7 are additionally fixed on the electric block 8 4 is used to separate the group parallel body 6 as a limit.
  • the thickness of a set of grids 4 is usually designed to be thin as paper, and there is a certain amount of space for miniaturizing the volume of the moving contact and improving the space utilization ratio of the parallel-connected body 6 and increasing the cross-sectional area of the flow.
  • the object of the present invention is to provide a movable contact of a circuit breaker which can effectively prevent an increase in contact resistance due to rollover of a parallel body, and can ensure a compact size and a simple structure while improving short-term withstand capability. .
  • the task of the present invention is to complete the movable contact of the circuit breaker including a pair of fixed plate grid seats, a set of grids, a set of parallel flexible conductors of the slewing support shaft, and a pair of conductive blocks.
  • the upper end of the board and the two sides of the insulating support are fixedly connected with the conductive block, the grid seat cover is arranged in a set of parallel bodies, and the two sets are fixed with a pair of fixed plates and
  • the near middle portion of the joint body is pivoted at a central portion of the slewing support shaft which is positioned at a pair of fixing plates at both ends, and the other end of the flexible conductive connecting wire is connected to one end of the flexible conductive connecting wire to be fixed on the electric block, and the feature is:
  • the utility model further comprises a fixing bracket mounted on the insulating support or the grid seat and accompanied by a set of parallel bodies; at least one of the set of parallel conductors is in the fixed bracket and is kept with other conductors
  • the fixing bracket is configured to have a parallel conductor matching cavity for accommodating at least one of the set of parallel conductors.
  • the pair of sidewalls of the parallel body matching cavity are vertical
  • the bottom wall of the parallel body receiving cavity is connected to the insulating support or the grid seat on the slewing support shaft.
  • the pair of side walls are provided with bottom holes and insulating supports corresponding to each other for avoiding the slewing support shaft and simultaneously providing a passage for the slewing support shaft.
  • the first pin is extended on a side edge of the pair of side walls facing the grid seat, and the first pin is inserted into the pin slot of the slot on the grid seat.
  • the pair of side walls are provided with a bottom wall and a grid seat corresponding to the slots for avoiding the swing support shaft and simultaneously providing a passage for the swing support shaft.
  • a pair of side walls are narrowly extended in a direction facing the insulating support with a second pin, and the second pin is inserted into the second pin receiving groove on the insulating support.
  • the bottom wall is fixed to an intermediate portion of the insulating support.
  • the bottom wall is fixed to an intermediate portion of the grid seat.
  • a bracket clip is extended on each of the upper portions of the pair of side walls.
  • the set of grids are extended on the grid holder and are embedded in the gap between the respective conductors of the group of parallel bodies.
  • the set of grids are extended over the insulating support and embedded in the gap between the respective conductors of a set of parallel conductors.
  • the grid holder further has a reinforcing bracket.
  • the significant advantages of the present invention over the prior art are: due to the addition of a fixed bracket, it is possible to effectively prevent the parallel body from being excessively deflected in the closed state to ensure the activity on a set of parallel bodies of the movable contact of the circuit breaker.
  • the contact between the contact and the static contact on the static contact is good, and the lower contact resistance is obtained, which is beneficial to reducing the temperature rise of the movable contact and the static contact during the short circuit, thereby improving the short-time withstand current value of the circuit breaker;
  • the design of the bracket changes the design field in the prior art, which can only alleviate the roll by increasing the thickness of each conductor of the parallel conductor, thereby ensuring the miniaturization of the moving contact volume and effectively controlling the overall volume of the circuit breaker.
  • the fixed bracket itself is easy to install and has economical and industrial applicability.
  • FIG. 1 is a structural view of a moving contact of a circuit breaker of the present invention.
  • FIG. 2 is a structural view of a second embodiment of a movable contact of the circuit breaker of the present invention.
  • FIG. 3 is a schematic view of the movable contact of the circuit breaker of the present invention. A practical example on the device.
  • the material is preferably a plastic insulating support 1
  • the side of the insulating support 1 facing a group of parallel conductors 6 is processed into an insulating bevel 13
  • the upper region of the insulating bevel 13 Arranged with a number of conductors corresponding to the number of conductors of the parallel conductors 6 and corresponding positions, the spring holes 15 can also be referred to as spring seats, at each end of the spring holes 1 5 into the spring 1 4, and the spring The other end of the 14 abuts against the spring receiving recess 36 on the parallel conductor 6.
  • the middle portion of the insulating support 1 more specifically in the upper part of the upper portion of the insulating bevel 1 3, there is a cavity for receiving the fixing of the fixing bracket 10 as described in detail below.
  • the center of 6 is machined with a threaded hole 17 .
  • the shape of the pair of fixing plates 2 is preferably the same, and is preferably made of a material metal.
  • the upper ends of the fixing plates 2 are fixed to the insulating support 1 by a set of screws not limited by the drawings, and the lower end passes through a transition shaft 37. It is coupled to the mount 2 1 of the conductive block 8.
  • a set of grids 4 (also referred to as combs) are extended on the side of the grid holder 3 facing the parallel conductors 6, that is, a group of grids 4 are followed by the grid holders 3.
  • the formed grid cavity 25 between the grids 4 is used for compensation or accommodation of the parallel conductors 6, when the grid holders 3 are placed in a group
  • a set of grids 4 and a set of parallel conductors 6 form a mutual compensation relationship.
  • the so-called mutual compensation relationship means that the grid 4 is embedded in the slit 29 between adjacent parallel conductors 6, and the parallel conductor 6 is embedded in the grid cavity 25.
  • a reinforcing bracket 23 can also be combined on the grid seat 3 by inserting or screwing or other similar positioning methods, and is added to the reinforcing bracket 23
  • the worker has a pair of first pin receiving slots 24, and it goes without saying that the function of the first pin receiving slot 24 is like a socket.
  • each of the conductors of a set of parallel conductors 6 has a movable contact 9 (also commonly referred to as a silver contact) for corresponding to the stationary contact of the stationary contact of the circuit breaker, with the near-middle of each conductor passing through
  • the shaft hole 3 8 is pivoted in the middle of the swing support shaft 5, the lower end is electrically connected to one end of the flexible conductive connection line 7, and the other end of the flexible conductive connection line 7 is fixed on the conductive block 8, and both ends of the swing support shaft 5 are placed
  • the shaft hole 1 9 prefabricated on the fixing plate 2 is fixed.
  • the screw holes 27 may be machined at both end end portions or at least one end surface portion of the slewing support shaft 5, screwed in, and the slewing support shaft 5 is prevented from being level on the fixed plate 2. The limit action of the direction.
  • a fixed bracket 10 is implanted between a group of parallel conductors 6.
  • the set of parallel conductors 6 is divided into three regions by the fixed bracket 10, and the parallel conductor 6 is used as the side.
  • the role of the support In order to make the pair of side walls 3 1 of the fixing bracket 10 in a perpendicular relationship with the slewing support shaft 5, it can be accompanied by the parallel conductor 6 without causing obstacles to the slewing support shaft 5 to be applied to the pair of fixing plates 2 or The blocking is called, so that the shaft holes 28 for providing the passages for the slewing support shaft 5 or the slewing support shafts 5 are provided on the pair of side walls 3 1 in correspondence with each other.
  • a screw fixing hole 12 is defined in the bottom wall 32 of the parallel conductor matching cavity 30, and the screw fixing hole 12 is passed through the screw fixing hole 12 and then screwed into the threaded hole 17 mentioned above, thereby realizing the fixing bracket 10
  • the insulating support 1 is fixed in phase to ensure that the aforementioned pair of side walls 3 1 are sufficiently perpendicular to the slewing support shaft 5.
  • the Applicant shows in the figure that a plurality of conductors 18 in the middle of a set of parallel conductors 6 are arranged in the aforementioned parallel conductors.
  • the cavity 30 is received, and the plurality of conductors 18 maintain a position that coincides with the other conductors.
  • a bracket clip 11 is extended on each of the upper portions of the pair of side walls 31 of the parallel conductor accommodating chamber 30 for further enhancing the anti-rolling action of the fixed bracket 10 on the tip end of the parallel conductor 6 at both ends thereof.
  • a first pin 20 having a shape structure not limited to the drawing is formed on one side edge of the pair of side walls 31 facing the grid holder 3, and the first pin 20 is interposed in the shape formed on the reinforcing bracket 23.
  • the structure of the pin bracket 24 is such that the fixing bracket 10 has more desirable stability.
  • a set of grids 4 are extended on the insulating bevel 13 of the insulating support 1.
  • Grooves 33 corresponding to each other are respectively disposed on a pair of side walls 31 of the parallel conductor matching chamber 30 of the fixing bracket 10.
  • the function of the slots 33 is as described for the shaft holes 28, and also for the pair of side walls 31 of the fixing bracket 10.
  • the slewing support shaft 5 can be traversed by the groove 33 so as to be blocked by the parallel conductor 6 without causing the slewing support shaft 5 to pass through the pair of fixing plates 2.
  • a second pin 34 is narrowly extended in a direction in which the pair of side walls 31 face the insulating support 1.
  • a pair of second pin receiving slots are formed in the insulating bevel 13 of the insulating support 1. 35.
  • the bottom wall of the parallel conductor accommodating chamber 30 is fixed to the grid holder 3 by screws or the like to ensure that the pair of side walls 31 of the fixing bracket 10 are perpendicular to the slewing support shaft 5. The rest is the same as the description of Embodiment 1.
  • the fixing bracket 10 is fixed in at least two ways, one is fixed to the insulating support 1 and the other is fixed to the grid seat 3.
  • a plurality of grids 4 may be formed on the grid holder 3 or on the insulating support 1.
  • the parallel conductor matching cavity 30 of the fixed bracket 10 is correspondingly narrowed, and one of the three conductors is arranged in the parallel conductor matching cavity 30, and
  • the number of parallel conductors 6 is, for example, 10 pieces, According to the need, three or four centers that are not limited by the absolute number are arranged in the parallel conductor matching chamber 30, and so on.
  • the base 3 of the circuit breaker is shown.
  • the movable contact of the structure shown in Embodiments 1 and 2 is installed in the movable contact cavity 40 of the base 3 9 .
  • the roll exhibited by the parallel conductor 6 can be suppressed by the fixing bracket 10 because the pair of side walls 3 1 of the fixing bracket 10 and the bracket clip 1 extending on the side wall 3 1 1
  • Separating a group of parallel conductors 6 into three regions in the group parallel conductor 6 can provide a solid and reliable fixing and limiting effect on the parallel conductors 6 in the lateral direction, reducing the influence of the accumulated lateral gaps and ensuring the movable contacts 9
  • the contact with the static contact of the static contact of the circuit breaker is good and a low contact resistance is obtained.
  • the specific shape and configuration of the fixing bracket 10 are not limited to the above embodiments, as long as the fixing bracket 10 is implanted between the parallel conductors 6 to separate the parallel conductors 6 and the lateral restrictions should be It is considered to belong to the technical solution claimed in the present invention.

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  • Breakers (AREA)

Description

断路器的动触头
技术领域
本发明涉及 种断路器的动触头， 设在断路器的基座的 动触头腔内 ， 与静触头相配合而起到对电路的通、 断作用， 属于低压电器技术领域。 背景技术
如业界明知之理， 在断路器的实际使用场合， 断路器导 电体的 自身电阻及动 静触头间的接触电阻对断路器的短时 耐受短路电流的性能起着重要的作用。 例如， 导电体的 自身 电阻或者动 、 静触头之间的接触电阻愈大 则越易导致断路 器承受短路电流时的发热量增大， 引起动、 静触头的触点 （动 触头上的活动触点及静触头上的静触点 ) 熔悍乃至损坏。 就 断路器的动触头而言， 由于动触头的并联触片 （习惯称并联 导体） 与回转支撑轴之间存在有配合间隙 ， 而且即使是再精 湛的技艺也无法做到消除前述的配合间隙 ， 因此当断路器在 合闸结束时， 并联导体往往表现出侧倾现象， 从而造成活动 触头的活动触点与静触占之间的接触不良 ， 使接触电阻增大 已有技术中的断路器的动触头的结构由图 4所示， 包括 绝缘支撑 1、 一对固定板 2、 栅片座 3 组栅片 4、 回转支 撑轴 5 组数量至少三枚的并联导体 6、 柔性导电连接线 7 导电块 8， 一对固定板 2 的上端与绝缘支撑 1 的两侧固定， 下
¾与寸电块 8 联结， 栅片座 3 罩 在 组并联寸体 6外 两 与 对固定板 2 固定 组栅片 4 间布于绝缘支撑 1 上 组并联寸体 6 的近中部枢 在两 定位于 对固定板 2上 的回转支撑轴 5 的中部 与柔性寸电连接线 7 的 联 柔性寸电连 线 7 的另 固定在寸电块 8上 o 很明显 4是用来对 组并联寸体 6作分隔限位的。 但是 虑到整个动触头的体积因素 以及必须兼顾到并联导体 6 的 空间利用率， 以便增加过流横截面积藉以降低断路器的温升 因素， 因此不可能也不允许将一组栅片 4 的各枚栅片的厚度 不受制约地增大， 而往往需要对其厚度加以限制。 基于此种 情形而通常将一组栅片 4 的厚度设计成薄若纸， 对于小化整 个动触头的体积和提冋并联寸体 6 的空间利用率及增加过流 横截面积虽有一定的建树 但是 如申请人在前面所述之理， 由于并联导体 6与回转支撑轴 5之间存在着无法消除的间隙， 当断路器合闸时， 并联导体 6所产生的侧倾现象难以由微薄 的栅片 4得到救济 ， 并联寸体 6上的活动触占 9 与静触头上 的静触占的位置产生不对应 使接触电阻增大 鉴于该种情 形 ， 西前的做法只能是以牺牲动触头体积的小型化为代价来 提 m珊片 4 的强度 ， 即全面增加一组栅片栅片 4 中的各枚栅 片的厚度
尽 业界始终在既有利于保障动 静触头的接触效果， 又不致于过度影响并联导体的空间利用率之间寻找平衡占 ， 但迄今为止未见有成功的文献报道和实际的 P
产 发明内容
本发明的任务是要提供一种既能有效地防止因并联寸体 侧倾而致接触电阻增大 ， 又能确保体积小型化并且结构简单 同时提高短时耐受能力的断路器的动触头。
本发明的任务是这样来完成的 种断路器的动触头 包括 绝缘支撑 一对固定板 栅片座 、 一组栅片 、 回转支 撑轴 一组并联寸体 柔性导电连接线 、 导电块 一对固定 板的上端与绝缘支撑的两侧固定 下 与导电块联结， 栅片 座罩 在一组并联寸体夕卜， 两 与一对固定板固定 j 组并 联寸体的近中部枢置在两端定位于一对固定板上的回转支撑 轴的中部， 与柔性导电连接线的一端联结 柔性导电连接线 的另 端固定在寸电块上， 特点在于 ： 还包括有一固定支架 该固定支架安装在绝缘支撑或栅片座上， 并且伴随于一组并 联寸体 ； 所述的一组并联导体中的至少一枚导体处于固定支 架内并且保持着与其它导体相一致的位置 所述的一组栅片 延设在栅片座或绝缘支撑两者任择其一上
在本发明的一个实施例中， 所述的固定支架构成有一用 于接应所述的一组并联导体中的至少一枚寸体的并联导体接 应腔 该并联寸体接应腔的一对侧壁垂直于所述的回转支撑 轴上 并联寸体接应腔的底壁与绝缘支撑或栅片座固定。
在本发明的另一个实施例中， 所述的一对侧壁上开设有 位 彼此对应的用于避开回转支撑轴并且同时为回转支撑轴 提供通道的轴孔 所述的底壁与绝缘支撑固定， 并且， 一对 侧壁所面向栅片座的一侧侧缘延设有第一插脚， 第一插脚插 在栅片座上的弟一插脚接应槽上。
在本发明的还一个实施例中， 所述的一对侧壁上开设有 位 彼此对应的用于避开回转支撑轴并且同时为回转支撑轴 提供通道的槽 所述的底壁与栅片座固定 并且， 一对侧壁 所面向绝缘支撑的方向窄缩延伸有第二插脚 ， 第二插脚插置 在绝缘支撑上的第二插脚接应槽内。
在本发明的又一个实施例中， 所述的底壁与绝缘支撑的 中间部位固定。
在本发明的再一个实施例中， 所述的底壁与栅片座的中 间部位固定。
在本发明的更而一个实施例中， 所述的一对侧壁的上部 各延设有一支架夹片。 在本发明的进而 个实施例中， 所述的一组栅片延设在 栅片座上并且镶入到 组并联寸体的各个导体之间的隙 由
在本发明的又更而一个实施例中， 所述的一组栅片延设 在绝缘支撑上并且镶入到一组并联导体的各个导体之间的隙 缝中。
在本发明的又进而一个实施例中， 所述的栅片座上还结 n有一补强支架。
本发明与已有技术相比的显著优点在于： 由于增设了固 定支架， 能有效地防止并联寸体在合闸状态时过度偏斜 保 证断路器的动触头的一组并联寸体上的活动触点与静触头上 的静触点接触良好， 获得较低的接触电阻 ， 有利于降低短路 时活动触点与静触点处的温升 提高断路器的短时耐受电流 值 ； 因固定支架的设 而改变了 已有技术中只能通过全面增 加并联导体的各枚导体的厚度来缓解侧倾的设计田路， 从而 得以保障动触头体积的小型化 使断路器的整体体积能有效 控制； 固定支架 自身结构间单 安装方便 ， 具有经济性和工 业实用性。 附图说明
图 1 为本发明断路器的动触头的弟一头她例结构图 图 2 为本发明断路器的动触头的第二实施例结构图 图 3 为本发明断路器的动触头安装于断路器上的一个实 用例 思图。
图 4 为本发明举证的已有技术中的断路器的动触头的示 具体实施方式
口
为了使贵审査贝尤其是公众能进一步理解本发明的实质 及有 1π?-效果 ， 中请人以具体的实施例方式详细描述如下， 但 不能视实施例为构成对本发明技术方案的限制。
实施例 1：
ΐ虫 i、体参阅图 1 ， 给出了材料优选为塑料的绝缘支撑 1， 该绝缘支撑 1 所面向一组并联导体 6 的一侧加工成有一绝缘 斜面 1 3， 绝缘斜面 1 3 的上部区域安排有与一组并联导体 6 的导体数量相当的并且位置相对应的弹簧孔 1 5， 弹簧孔 1 5 又可称为弹簧座， 在各弹簧孔 1 5 内容入弹簧 1 4 的一端， 而 弹簧 14 的另一端抵挡在并联导体 6上的弹簧容置凹腔 3 6上。 在绝缘支撑 1 的中间部位， 更具体地讲在绝缘斜面 1 3 的偏上 部中间部位加工有一用于接应下面还要详述的用于供固定支 架 1 0 固定的凹腔 1 6， 凹腔 1 6之中央加工有螺纹孔 1 7。 一对 固定板 2 的形状以相同为优选， 并且以材质金属为优选， 固 定板 2 的上端各用一组数量不受图示所限的螺钉与绝缘支撑 1 固定， 下端通过一过渡轴 3 7 与导电块 8 的安装座 2 1 联结。
在本例中， 一组栅片 4 (也可称其为梳片） 延设在了栅片 座 3 所面向并联导体 6 的一侧， 也就是说一组栅片 4是随栅 片座 3 模塑成型时构成于栅片座 3 上的， 各栅片 4之间的所 构成的栅片腔 25 是供并联导体 6补偿或称容纳之用的， 当栅 片座 3 罩置到一组并联导体 6上并且在其两端用螺钉 22与固 定板 2 固定后， 一组栅片 4 与一组并联导体 6形成互为补偿 关系。 所谓的互为补偿关系是指栅片 4镶入到了相邻并联导 体 6之间的隙缝 29 中， 而并联导体 6镶入了栅片腔 25 中。 在栅片座 3 上还可以通过插嵌方式或螺钉固定方式或其它类 似的定位方式结合有一补强支架 23，并且在补强支架 23 上加 工有一对第一插脚接应槽 24， 不言而喻， 第一插脚接应槽 24 的功用犹如插座之理。
如业界明知之理， 一组并联导体 6 的导体数量依据不同 的使用要求而不尽相同， 少则可减至三枚， 多则可达十几枚 乃至更多， 据此而不能由图示之数量对本发明方案构成限制。 一组并联导体 6 的各枚导体上均具有一用于与断路器的静触 头的静触点相对应的活动触点 9 (通常还称为银触点） ， 各枚 导体的近中部通过轴孔 3 8枢置在回转支撑轴 5 的中部， 下端 与柔性导电连接线 7 的一端电联结， 柔性导电连接线 7 的另 一端固定在导电块 8上， 回转支撑轴 5 的两端置于固定板 2 上所预制的轴孔 1 9 中。 作为一种优选但不限于的方案， 可以 在回转支撑轴 5 的两端端面部位或至少一端端面部位加工螺 钉孔 27， 用螺钉旋入， 在固定板 2上对回转支撑轴 5 起到防 水平方向窜动的限位作用。
请继续参阅图 1， 一固定支架 1 0被植入在了一组并联导 体 6之间， 由固定支架 1 0将一组并联导体 6分割成了 3 个区 域， 并且对并联导体 6担当着侧向支承的作用。 为了使与回 转支撑轴 5保持垂直关系的固定支架 1 0 的一对侧壁 3 1 既能 与并联导体 6相伴， 又不致以给回转支撑轴 5 穿设到一对固 定板 2上造成障碍或称阻挡， 因此， 在一对侧壁 3 1 上加工有 位置彼此对应的为回转支撑轴 5 提供通道或者说避开回转支 撑轴 5 的轴孔 28。 并联导体接应腔 3 0 的底壁 32上开设有螺 钉固定孔 12， 用螺钉 26 穿过螺钉固定孔 12进而旋及到前面 已提及的螺纹孔 1 7 内，从而使固定支架 1 0 实现与绝缘支撑 1 相固定， 确保前述的一对侧壁 3 1 与回转支撑轴 5 充分垂直。 为了便于使公众轻松理解， 申请人在图中示出了将一组并联 导体 6中的居于中间的多枚导体 1 8安排在了前述的并联导体 接应腔 30 中， 并且多枚导体 18保持着与其它导体相一致的 位置。 在并联导体接应腔 30 的一对侧壁 31 的上部各延伸有 支架夹片 11，用来进一步增进固定支架 10对位于其两端的并 联导体 6 的梢部的防侧倾作用。 又， 在一对侧壁 31 所面向栅 片座 3 的一侧侧缘设计有形状构造不受图示限制的第一插脚 20， 第一插脚 20插置在成形于补强支架 23 上的第一插脚接 应槽 24上， 如此结构能使固定支架 10更具有理想的稳定性。
实施例 2:
请具体参阅图 2， 作为另一种具体的实施方式， 一组栅片 4延设在了绝缘支撑 1 的绝缘斜面 13 上。在固定支架 10 的并 联导体接应腔 30 的一对侧壁 31 上分别开设位置彼此对应的 槽 33， 槽 33 的功用如同对轴孔 28 的描述， 同样为了使固定 支架 10 的一对侧壁 31 既能与并联导体 6相伴， 又不致以给 回转支撑轴 5 穿设到一对固定板 2上构成阻碍， 故而由槽 33 跨越回转支撑轴 5。 在一对侧壁 31 所面向绝缘支撑 1 的方向 窄缩地延伸有第二插脚 34， 为了补偿该对第二插脚 34， 因此 在绝缘支撑 1 的绝缘斜面 13 上开设有一对第二插脚接应槽 35。 并联导体接应腔 30 的底壁通过螺钉或其它类似方式与栅 片座 3 固定，保证固定支架 10 的一对侧壁 31 与回转支撑轴 5 垂直。 其余同对实施例 1 的描述。
通过申请人所给出的上述二个实施例， 完全可以理解出 固定支架 10 的固定方式至少有二种，一为与绝缘支撑 1 固定， 另一为与栅片座 3 固定。 一组栅片 4 既可以成形于栅片座 3 上， 也可以构成于绝缘支撑 1 上。 此外， 当一组并联导体 6 的数量少至 3 枚时， 那么固定支架 10 的并联导体接应腔 30 相应窄缩， 将 3 枚导体中的居中一枚安排于并联导体接应腔 30 中， 又如， 当并联导体 6 的数量为多枚例如 10枚时， 则可 根据需要将居中的不受绝对数量限定的 3 枚或 4枚安排于并 联导体接应腔 3 0 中， 依据此理而类推。
应用例：
请具体参阅图 3， 给出了断路器的基座 3 9， 本发明由实 施例 1、 2所示结构的动触头被安装在了基座 3 9 的动触头腔 40 中， 安装方式与已有技术相同。
当断路器合闸结束时， 并联导体 6所表现出的侧倾可以 由固定支架 1 0得到抑制， 因为固定支架 1 0 的一对侧壁 3 1 以 及侧壁 3 1 上延伸的支架夹片 1 1 伴随于 组并联导体 6 中 将一组并联导体 6分隔成了 3 个区域 能对并联导体 6在侧 向提供坚实可靠的固定和限位作用， 减少累积侧向间隙的影 响 确保活动触点 9与断路器的静触头的静触占的接触良好 而获得较低的接触电阻。
综上所述， 对于固定支架 1 0 的具体形状、 构造并不限于 上述的实施方式， 只要将固定支架 1 0植入于并联导体 6之间 藉以对并联导体 6分隔、 侧向限位都应视为属于本发明所要 求保护的技术方案范畴。

Claims

权 利 要 求 书
1、 一种断路器的动触头， 包括： 绝缘支撑（1)、 一对固定 板（2)、 栅片座（3)、 一组栅片（4)、 回转支撑轴（5)、 一组并联 导体（6)、 柔性导电连接线（7)、 导电块（8)， 一对固定板（2)的 上端与绝缘支撑（1)的两侧固定， 下端与导电块（8)联结， 栅片 座（3)罩置在一组并联导体（6)外， 两端与一对固定板（2)固定， 一组并联导体（6)的近中部枢置在两端定位于一对固定板（2) 上的回转支撑轴（5)的中部， 与柔性导电连接线（7)的一端联 结， 柔性导电连接线（7)的另一端固定在导电块（8)上， 其特征 在于还包括有一固定支架（10)， 该固定支架（10)安装在绝缘支 撑（1)或栅片座（3 上， 并且伴随于一组并联导体 6; 所述的一 组并联导体（6)中的至少一枚导体处于固定支架（10)内并且保 持着与其它导体相一致的位置， 所述的一组栅片（4)延设在栅 片座（3)或绝缘支撑（1)两者任择其一上。
2、 根据权利要求 1 所述的断路器的动触头， 其特征在于 所述的固定支架（ 10)构成有一用于接应所述的一组并联导体 (6)中的至少一枚导体的并联导体接应腔（30)， 该并联导体接 应腔（30)的一对侧壁（31)垂直于所述的回转支撑轴（5)上，而并 联导体接应腔（30)的底壁（32)与绝缘支撑（1)或栅片座（3)固 定。
3、 根据权利要求 2所述的断路器的动触头， 其特征在于 所述的一对侧壁（31)上开设有位置彼此对应的用于避开回转 支撑轴（5)并且同时为回转支撑轴（5)提供通道的轴孔（28)， 所 述的底壁（32)与绝缘支撑（1)固定， 并且， 一对侧壁（31)所面向 栅片座（3)的一侧侧缘延设有第一插脚（20)，第一插脚（20)插置 在栅片座（3)上的第一插脚接应槽（24)上。
4、 根据权利要求 2所述的断路器的动触头， 其特征在于 所述的一对侧壁（31)上开设有位置彼此对应的用于避开回转 支撑轴（5)并且同时为回转支撑轴（5)提供通道的槽（33)， 所述 的底壁（32)与栅片座（3)固定， 并且， 一对侧壁（31)所面向绝缘 支撑（ 1)的方向窄缩延伸有第二插脚（34)，第二插脚（34)插置在 绝缘支撑（ 1)上的第二插脚接应槽（35)内。
5、 根据权利要求 3 所述的断路器的动触头， 其特征在于 所述的底壁（32)与绝缘支撑（1)的中间部位固定。
6、 根据权利要求 4所述的断路器的动触头， 其特征在于 所述的底壁（32)与栅片座（3)的中间部位固定。
7、 根据权利要求 3 或 4所述的断路器的动触头， 其特征 在于所述的一对侧壁（31)的上部各延设有一支架夹片（11)。
8、 根据权利要求 1 所述的断路器的动触头， 其特征在于 所述的一组栅片（4)延设在栅片座（3)上并且镶入到一组并联 导体（6)的各个导体之间的隙缝（29)中。
9、 根据权利要求 1 所述的断路器的动触头， 其特征在于 所述的一组栅片（4)延设在绝缘支撑（1)上并且镶入到一组并 联导体（6)的各个导体之间的隙缝（29)中。
10、 根据权利要求 1 或 8所述的断路器的动触头， 其特 征在于所述的栅片座（3)上还结合有一补强支架（23)。
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