WO2016107364A1 - Adjustable thermal tripping device for miniature circuit breaker - Google Patents

Adjustable thermal tripping device for miniature circuit breaker Download PDF

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Publication number
WO2016107364A1
WO2016107364A1 PCT/CN2015/096096 CN2015096096W WO2016107364A1 WO 2016107364 A1 WO2016107364 A1 WO 2016107364A1 CN 2015096096 W CN2015096096 W CN 2015096096W WO 2016107364 A1 WO2016107364 A1 WO 2016107364A1
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Prior art keywords
trip
linkage
circuit breaker
link
push rod
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PCT/CN2015/096096
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French (fr)
Chinese (zh)
Inventor
卢科军
严鹏斌
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上海电科电器科技有限公司
上海诺雅克电气有限公司
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Priority to CN201410853389.4 priority Critical
Priority to CN201410853389.4A priority patent/CN104465247B/en
Application filed by 上海电科电器科技有限公司, 上海诺雅克电气有限公司 filed Critical 上海电科电器科技有限公司
Publication of WO2016107364A1 publication Critical patent/WO2016107364A1/en

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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/74Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7427Adjusting only the electrothermal mechanism
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10Operating or release mechanisms
    • H01H71/12Automatic release mechanisms with or without manual release
    • H01H71/14Electrothermal mechanisms
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10Operating or release mechanisms
    • H01H71/12Automatic release mechanisms with or without manual release
    • H01H71/14Electrothermal mechanisms
    • H01H71/16Electrothermal mechanisms with bimetal element
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/74Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7427Adjusting only the electrothermal mechanism
    • H01H71/7436Adjusting the position (or prestrain) of the bimetal
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/74Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7427Adjusting only the electrothermal mechanism
    • H01H2071/7454Adjusting only the electrothermal mechanism with adjustable axis of transmission lever between bimetal element and trip lever
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/74Means for adjusting the conditions under which the device will function to provide protection
    • H01H2071/7481Means for adjusting the conditions under which the device will function to provide protection with indexing means for magnetic or thermal tripping adjustment knob
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10Operating or release mechanisms
    • H01H71/12Automatic release mechanisms with or without manual release
    • H01H71/14Electrothermal mechanisms
    • H01H71/16Electrothermal mechanisms with bimetal element
    • H01H71/162Electrothermal mechanisms with bimetal element with compensation for ambient temperature

Abstract

Disclosed is an adjustable thermal tripping device for a miniature circuit breaker, which is mounted inside a base (101) of the miniature circuit breaker, and which comprises: a tripping mechanism (106), a thermal deformation element (107) and an adjustment mechanism (102). The tripping mechanism has a protruding tripping link (161). The thermal deformation element is provided to be near the tripping link, and there is an interval between the thermal deformation element and the tripping link. The adjustment mechanism adjusts the distance of the interval between the tripping link and the thermal deformation element. A current in a loop where the miniature circuit breaker is connected heats and deforms the thermal deformation element, and thus the deformed thermal deformation element moves towards the tripping link to come into contact therewith and push same, such that the tripping mechanism is triggered to trip. The adjustment mechanism adjusts the distance between the thermal deformation element and the tripping link so as to adjust a setting current in the loop. The use of a rigid member to adjust the distance between the thermal deformation element and the tripping link in the tripping device can ensure the distance between the thermal deformation element and the tripping link is constant in each operation, and thus the tripping device is applicable to an electric motor.

Description

小型断路器的热式可调脱扣装置Thermal adjustable trip device for miniature circuit breaker 技术领域Technical field
本发明涉及低压电器领域,更具体地说,涉及断路器中的脱扣装置。This invention relates to the field of low voltage electrical appliances and, more particularly, to a trip device in a circuit breaker.
背景技术Background technique
断路器是低压配电网中主要的保护开关,为线路提供过载和短路保护。为了扩大断路器的使用范围,根据过载电流的大小或用电设备的保护特性,需要具有可调节断路器整定电流的功能。特别在为电动机提供保护时,为了适应不同功率电动机的选配,需要设有一定的电流调节范围,根据电动机额定电流值尽可能选择整定电流范围中间区域的值。The circuit breaker is the main protection switch in the low voltage distribution network, providing overload and short circuit protection for the line. In order to expand the range of use of the circuit breaker, depending on the magnitude of the overload current or the protection characteristics of the electrical equipment, it is necessary to have the function of adjusting the setting current of the circuit breaker. Especially when providing protection for the motor, in order to adapt to the selection of different power motors, it is necessary to set a certain current adjustment range, and select the value of the middle region of the setting current range as much as possible according to the rated current value of the motor.
目前塑壳式断路器中已具有可调式的热式脱扣器,塑壳式断路器主要还是应用于大容量产品,随着目前家用电器及小容量产品的不断开发与应用,以及模式化产品的安装要求,塑壳式断路器已不能满足需求。而且目前大多应用的电子式脱扣系统虽然动作精度高,但对元器件的要求很高,电磁兼容也难通过,在模数化产品的有限空间内也很难设置,不能真正实现断路器的模数小型化要求,且制造成本也高,一定程度限制了断路器的使用范围。At present, there is an adjustable thermal release in the molded case circuit breaker, and the molded case circuit breaker is mainly applied to large-capacity products, with the continuous development and application of current household appliances and small-capacity products, and model products. The installation requirements, molded case circuit breakers can no longer meet the demand. Moreover, most of the electronic tripping systems currently used have high operational precision, but the requirements for components are high, and electromagnetic compatibility is difficult to pass. It is also difficult to set in the limited space of the modularized product, and the circuit breaker cannot be realized. Modular miniaturization requirements, and high manufacturing costs, to a certain extent limit the use of circuit breakers.
专利号为CN98115470.0的中国专利揭示了一种单相断路器,含有可被过载跳闸元件启动的开关机构;可与其他单相断路器联接,当其中一个断路器过载时,所有的断路器的各极都断开;还可以加上由操作元件和与该操作元件相连的电流刻度盘组成的电流范围设置器件;在过载跳闸元件和支架之间设置楔形的调节片,支架作用于开关机构上;楔形的调节片通过弹性灵活的弹簧与中间导引片牢固连接;中间导引片安装在断路器的壳体上,能沿过载跳闸元件的动作方向移动。该方案通过楔形的调节片来弥补不同工作电流双金属元件所需的位移量,而楔形面作用在过载跳闸元件上的有效作用力会因斜面的存在而减小。该方案通过一个弹簧片来带动楔 形面的位置,弹簧片作为一种柔性件,其对楔形块行程无法精确控制,存在较大的误差,每次操作调节旋转在同一刻度时,楔形块不一定在同一个固定位置,从而大大降低了产品的脱扣特性。The Chinese patent No. CN98115470.0 discloses a single-phase circuit breaker with a switching mechanism that can be activated by an overload tripping element; it can be connected with other single-phase circuit breakers, and when one of the circuit breakers is overloaded, all the circuit breakers Each pole is disconnected; a current range setting device consisting of an operating element and a current dial connected to the operating element may be added; a wedge-shaped regulating piece is disposed between the overload tripping element and the bracket, and the bracket acts on the switching mechanism The wedge-shaped regulating piece is firmly connected to the intermediate guiding piece by a flexible and flexible spring; the intermediate guiding piece is mounted on the casing of the circuit breaker and can move along the moving direction of the overload tripping element. The solution compensates for the required displacement of the bimetal element of different working currents by the wedge-shaped regulating piece, and the effective force of the wedge surface acting on the overload trip element is reduced by the presence of the bevel. The program uses a spring piece to drive the wedge The position of the shape surface, the spring piece as a flexible piece, the stroke of the wedge block can not be precisely controlled, there is a large error, the wedge block is not necessarily in the same fixed position when the operation is adjusted to rotate at the same scale, so Reduces the tripping characteristics of the product.
专利号为CN03137174.4的中国专利揭示了一种用于电路断路器的可调热跳闸组件。在一种热跳闸组件中的双金属片致动一个跳闸机构时的电路断路器的电流/时间特征值,通过一个包括可分别绕一个共同的枢轴线旋转的第一和第二枢摆元件的可调接合器调节。由于过电流引起的双金属片的折弯引起第一枢摆元件的旋转,该第一枢摆元件通过一个平行于共同的枢轴线延伸的接合元件与进行旋转以致动跳闸机构的第二枢摆元件接合。一个定位器使该接合元件朝向和背离共同的枢轴线移动以调节致动跳闸机构所需的双金属片的折弯量。该方案的调节装置结构复杂,零部件繁多,大大提高了制作难度,并且诸多零部件带来的配合会降低调节机构的调节精度与可靠性。Chinese Patent No. CN03137174.4 discloses an adjustable thermal trip assembly for a circuit breaker. A current/time characteristic value of a circuit breaker when a bimetal in a thermal trip assembly actuates a trip mechanism through a first and second pivoting member including rotations that are respectively rotatable about a common pivot axis Adjustable adapter adjustment. The bending of the bimetal caused by the overcurrent causes rotation of the first pivoting element, the first pivoting element being rotated by an engaging element extending parallel to the common pivot axis to actuate the second pivoting of the trip mechanism Component bonding. A positioner moves the engagement element toward and away from the common pivot axis to adjust the amount of bending of the bimetal required to actuate the trip mechanism. The adjustment device of the scheme has a complicated structure and various components, which greatly improves the production difficulty, and the cooperation brought by many components reduces the adjustment precision and reliability of the adjustment mechanism.
发明内容Summary of the invention
本发明旨在提出一种结构简单、体积小、适用于小型断路器的热式可调脱扣装置。The invention aims to provide a thermal adjustable trip device which is simple in structure, small in size and suitable for a miniature circuit breaker.
根据本发明的一实施例,提出一种小型断路器的热式可调脱扣装置,安装在小型断路器的基座内,包括:基座、脱扣机构、热变形元件和调节机构。脱扣机构具有伸出的脱扣连杆。热变形元件临近脱扣连杆设置,热变形元件与脱扣连杆之间保留间隔。调节机构调节脱扣连杆与热变形元件之间的间隔的距离。小型断路器所接入的回路中的电流使得热变形元件发热变形,热变形元件变形后朝向脱扣连杆移动,与脱扣连杆接触并推动脱扣连杆,触发脱扣机构脱扣。调节机构调节热变形元件与脱扣连杆之间的距离以调节回路中整定电流的大小。According to an embodiment of the invention, a thermal adjustable trip device for a miniature circuit breaker is provided, which is mounted in a base of a miniature circuit breaker and includes a base, a trip mechanism, a thermal deformation element and an adjustment mechanism. The trip mechanism has an extended trip link. The heat-deformable element is disposed adjacent to the trip link, and a space is reserved between the heat-deformable element and the trip link. The adjustment mechanism adjusts the distance between the trip link and the thermally deformable element. The current in the circuit connected to the miniature circuit breaker causes the heat deformation element to be thermally deformed, and the heat deformation element moves toward the trip link after being deformed, contacts the trip link and pushes the trip link to trigger the trip mechanism to trip. The adjustment mechanism adjusts the distance between the thermally deformable element and the trip link to adjust the magnitude of the set current in the loop.
在一个实施例中,调节机构包括推杆,推杆的第一端与脱扣连杆接触,推杆的第二端与一斜面接触,调节推杆的第二端与斜面接触的位置,推杆 的第一端相应调节脱扣连杆的位置,以调节热变形元件与脱扣连杆之间的距离。In one embodiment, the adjustment mechanism includes a push rod, the first end of the push rod is in contact with the trip link, the second end of the push rod is in contact with a slope, and the position of the second end of the push rod is in contact with the slope, Rod The first end adjusts the position of the trip link accordingly to adjust the distance between the thermally deformable element and the trip link.
在一个实施例中,调节机构包括:调节旋钮、联动件、推杆和弹簧。调节旋钮能旋转。联动件与调节旋钮联动,调节旋钮旋转,联动件沿调节旋钮的径向移动,联动件上具有所述斜面,斜面在沿径向的方向上,具有不同的轴向厚度。推杆沿轴向设置,推杆的第一端形成第一凸起,第一凸起与脱扣连杆接触,推杆的第二端形成第二凸起,第二凸起与斜面接触。弹簧的一端固定在基座上,弹簧的另一端固定在推杆上,弹簧将推杆的第二凸起压紧在斜面上。In one embodiment, the adjustment mechanism includes an adjustment knob, a linkage, a push rod, and a spring. The adjustment knob can be rotated. The linkage member is coupled with the adjustment knob, the adjustment knob is rotated, and the linkage member moves along the radial direction of the adjustment knob. The linkage member has the inclined surface, and the inclined surface has different axial thicknesses in the radial direction. The push rod is disposed in the axial direction, and the first end of the push rod forms a first protrusion, the first protrusion is in contact with the trip link, the second end of the push rod forms a second protrusion, and the second protrusion is in contact with the inclined surface. One end of the spring is fixed on the base, and the other end of the spring is fixed on the push rod, and the spring presses the second protrusion of the push rod against the inclined surface.
在一个实施例中,调节旋钮包括:外圆柱、内圆柱、联动柱和限位件。外圆柱的外表面上开有箭头槽。内圆柱位于外圆柱的内侧,内圆柱的直径小于外圆柱,内圆柱与外圆柱同心。联动柱位于内圆柱的内侧,联动柱靠近内圆柱的边缘,联动柱与内圆柱不同心。限位件位于联动柱的端部,限位件的直径大于联动柱。In one embodiment, the adjustment knob includes an outer cylinder, an inner cylinder, a linkage post, and a limit member. An arrow groove is formed on the outer surface of the outer cylinder. The inner cylinder is located inside the outer cylinder, the inner cylinder has a smaller diameter than the outer cylinder, and the inner cylinder is concentric with the outer cylinder. The linkage column is located inside the inner cylinder, and the linkage column is close to the edge of the inner cylinder, and the linkage column is not concentric with the inner cylinder. The limiting member is located at the end of the linkage column, and the diameter of the limiting member is larger than the linkage column.
在一个实施例中,联动件的外侧为平面,内侧形成有所述斜面,联动件上形成有联动槽,联动柱位于所述联动槽中,调节旋钮旋转,联动柱带动所述联动件沿径向移动,限位件限制调节旋钮与联动件的轴向相对位移。In one embodiment, the outer side of the linkage is a flat surface, and the inclined surface is formed on the inner side, and the linkage is formed with a linkage groove, the linkage column is located in the linkage groove, the adjustment knob is rotated, and the linkage column drives the linkage along the diameter To move, the limit member limits the axial relative displacement of the adjustment knob and the linkage.
在一个实施例中,基座上开有圆孔,调节旋钮安装在圆孔中。基座在靠近圆孔的位置开设有第一槽,第一槽为径向,联动件在第一槽中滑动。基座在第一槽的一端开设有第二槽,第二槽为轴向,推杆在第二槽中滑动。In one embodiment, the base is provided with a circular opening and the adjustment knob is mounted in the circular opening. The base is provided with a first groove near the circular hole, the first groove is radial, and the linkage slides in the first groove. The base is provided with a second slot at one end of the first slot, the second slot is axial, and the push rod slides in the second slot.
在一个实施例中,圆孔的直径与内圆柱的直径形成过盈配合。In one embodiment, the diameter of the circular aperture forms an interference fit with the diameter of the inner cylinder.
在一个实施例中,脱扣连杆呈U型,脱扣连杆的第一臂与脱扣机构连接,脱扣连杆的U型顶点与推杆的第二凸起接触,脱扣连杆的第二臂与热变形元件之间保留间隔。In one embodiment, the trip link is U-shaped, the first arm of the trip link is coupled to the trip mechanism, and the U-shaped apex of the trip link is in contact with the second protrusion of the push rod, the trip link The second arm is spaced from the thermally deformable element.
在一个实施例中,热变形元件是双金属片,电流使得双金属片发热变形,双金属片的一端朝向脱扣连杆的第二臂移动,与脱扣连杆的第二臂接触并推动脱扣连杆的第二臂,脱扣连杆的第一臂触发脱扣机构脱扣。 In one embodiment, the thermally deformable element is a bimetal, the current causes the bimetal to thermally deform, and one end of the bimetal moves toward the second arm of the trip link, contacting and pushing the second arm of the trip link The second arm of the trip link, the first arm of the trip link triggers the trip mechanism to trip.
在一个实施例中,该小型断路器用于电动机。In one embodiment, the miniature circuit breaker is for an electric motor.
本发明的小型断路器的热式可调脱扣装置利用刚性件来调节脱扣连杆与热变形元件之间的距离。刚性件能够确保每一次操作中热变形元件与脱扣连杆之间的距离固定,从而保证脱扣特性的稳定并增加热变形元件的受热弯曲行程及作用力。该热式可调脱扣装置结构简单、制作成本低、体积小。采用本发明的热式可调脱扣装置的小型断路器适用于电动机,尤其是家用电器中的小功率电动机。The thermally adjustable trip device of the miniature circuit breaker of the present invention utilizes a rigid member to adjust the distance between the trip link and the thermally deformable member. The rigid member ensures that the distance between the thermally deformable member and the trip link is fixed in each operation, thereby ensuring the stability of the tripping characteristic and increasing the heated bending stroke and force of the thermally deformable member. The thermal adjustable trip device has the advantages of simple structure, low manufacturing cost and small volume. The miniature circuit breaker using the thermal adjustable trip device of the present invention is suitable for use in electric motors, especially small power motors in household appliances.
附图说明DRAWINGS
本发明上述的以及其他的特征、性质和优势将通过下面结合附图和实施例的描述而变的更加明显,在附图中相同的附图标记始终表示相同的特征,其中:The above and other features, aspects, and advantages of the present invention will become more apparent from the description of the appended claims appended claims
图1揭示了根据本发明的一实施例的热式可调脱扣装置中调节机构的结构图。1 is a block diagram showing an adjustment mechanism in a thermal adjustable trip device in accordance with an embodiment of the present invention.
图2A和2B揭示了根据本发明的一实施例的热式可调脱扣装置中调节旋钮的结构图。2A and 2B are structural views showing an adjustment knob in a thermal adjustable trip device according to an embodiment of the present invention.
图3揭示了根据本发明的一实施例的热式可调脱扣装置中联动件的结构图。3 is a structural view of a linkage in a thermally adjustable trip device in accordance with an embodiment of the present invention.
图4揭示了根据本发明的一实施例的热式可调脱扣装置中推杆的结构图。4 is a structural view of a push rod in a thermal adjustable trip device according to an embodiment of the present invention.
图5揭示了用于安装根据本发明的一实施例的热式可调脱扣装置的基座的部分区域的结构图。Figure 5 discloses a structural view of a partial region of a base for mounting a thermally adjustable trip device in accordance with an embodiment of the present invention.
图6揭示了根据本发明的一实施例的热式可调脱扣装置的工作原理,其中整定电流是大电流。Figure 6 illustrates the operation of a thermally adjustable trip device in accordance with an embodiment of the present invention in which the setting current is a large current.
图7揭示了根据本发明的一实施例的热式可调脱扣装置的工作原理,其中整定电流是小电流。Figure 7 illustrates the operation of a thermally adjustable trip device in accordance with an embodiment of the present invention in which the set current is a small current.
图8揭示了采用本发明的一实施例的热式可调脱扣装置的小型断路器 的外观结构图。Figure 8 illustrates a miniature circuit breaker employing a thermally adjustable trip device in accordance with an embodiment of the present invention The appearance of the structure.
具体实施方式detailed description
本发明的热式可调脱扣装置的基本设计是采用一个刚性件来调节脱扣连杆与热变形元件之间的间隔,以调节整定电流的大小。刚性件的特性使得每一次调节完成后,脱扣连杆与热变形元件之间的距离是固定的,不像弹性件那样不稳定,因此可以提高脱扣特性的稳定性。The basic design of the thermal adjustable trip device of the present invention uses a rigid member to adjust the spacing between the trip link and the thermally deformable member to adjust the magnitude of the set current. The characteristics of the rigid member are such that the distance between the trip link and the thermally deformable member is fixed after each adjustment, and is not as unstable as the elastic member, so that the stability of the tripping characteristic can be improved.
根据本发明的一实施例,提出一种适用于小型断路器的热式可调脱扣装置,该热式可调脱扣机构安装在小型断路器的基座内,包括:脱扣机构、热变形元件和调节机构。脱扣机构具有伸出的脱扣连杆。热变形元件临近脱扣连杆设置,热变形元件与脱扣连杆之间保留间隔。调节机构调节脱扣连杆与热变形元件之间的间隔的距离。其中调节机构形成一刚性件。小型断路器所接入的回路中的电流使得热变形元件发热变形,热变形元件变形后朝向脱扣连杆移动,与脱扣连杆接触并推动脱扣连杆,触发脱扣机构脱扣。调节机构调节热变形元件与脱扣连杆之间的距离以调节回路中整定电流的大小。According to an embodiment of the invention, a thermal adjustable trip device suitable for a miniature circuit breaker is provided. The thermal adjustable trip mechanism is mounted in a base of a miniature circuit breaker, including: a trip mechanism, and a heat Deformation element and adjustment mechanism. The trip mechanism has an extended trip link. The heat-deformable element is disposed adjacent to the trip link, and a space is reserved between the heat-deformable element and the trip link. The adjustment mechanism adjusts the distance between the trip link and the thermally deformable element. The adjustment mechanism forms a rigid member. The current in the circuit connected to the miniature circuit breaker causes the heat deformation element to be thermally deformed, and the heat deformation element moves toward the trip link after being deformed, contacts the trip link and pushes the trip link to trigger the trip mechanism to trip. The adjustment mechanism adjusts the distance between the thermally deformable element and the trip link to adjust the magnitude of the set current in the loop.
在一个实施例中,调节机构利用斜面来实现距离的调节。调节机构中包括推杆,推杆的第一端与脱扣连杆接触,推杆的第二端与一斜面接触,调节推杆的第二端与斜面接触的位置,由于斜面是倾斜的,使得推杆的位置发生变化,推杆的第一端相应调节脱扣连杆的位置,以调节热变形元件与脱扣连杆之间的距离。In one embodiment, the adjustment mechanism utilizes a bevel to effect adjustment of the distance. The adjusting mechanism includes a push rod, the first end of the push rod is in contact with the trip link, and the second end of the push rod is in contact with a slope, and the position of the second end of the push rod is in contact with the inclined surface, because the inclined surface is inclined, The position of the push rod is changed, and the first end of the push rod adjusts the position of the trip link correspondingly to adjust the distance between the heat deformation element and the trip link.
参考图1所示,图1揭示了根据本发明的一实施例的热式可调脱扣装置中调节机构的结构图。该调节机构包括调节旋钮102、联动件103、推杆104和弹簧105。Referring to Figure 1, there is shown a block diagram of an adjustment mechanism in a thermally adjustable trip unit in accordance with an embodiment of the present invention. The adjustment mechanism includes an adjustment knob 102, a linkage 103, a push rod 104, and a spring 105.
参考图2A和2B,揭示了根据本发明的一实施例的热式可调脱扣装置中调节旋钮的结构图。调节旋钮102能旋转。调节旋钮102包括:外圆柱122、内圆柱123、联动柱124和限位件125。外圆柱122的外表面上开 有箭头槽121。内圆柱123位于外圆柱122的内侧,内圆柱123的直径小于外圆柱122,内圆柱123与外圆柱122同心。联动柱124位于内圆柱123的内侧,联动柱124靠近内圆柱123的边缘,联动柱124与内圆柱123不同心。联动柱124与内圆柱123形成偏心结构。限位件125位于联动柱124的端部,限位件125的直径大于联动柱124。调节旋钮102安装在基座101的一个圆孔112中,圆孔112位于基座101的前侧壁上。圆孔102的直径与内圆柱123的直径形成过盈配合的关系,安装之后,内圆柱123卡在圆孔102中,外圆柱122位于基座101之外。由于圆孔与内圆柱是过盈配合的关系,在没有外力驱动的情况下,调节旋钮102不会自己转动,因此能够确保所设置参数和脱扣性能的稳定。外圆柱122上的箭头槽121具有两个作用,第一个作用是可供工具插入后旋转,工具插入箭头槽121后提供旋转外力,来转动调节旋钮102。箭头槽121的另一个作用是箭头可以指向指定数值,该数值表示指定的整定电流。数值可以刻在圆孔周围的壳体上。联动柱124和限位件125的作用主要是为了与联动件103配合联动。下面会结合联动件进一步描述。Referring to Figures 2A and 2B, a structural view of an adjustment knob in a thermally adjustable trip device in accordance with an embodiment of the present invention is disclosed. The adjustment knob 102 can be rotated. The adjustment knob 102 includes an outer cylinder 122, an inner cylinder 123, a linkage post 124, and a limiting member 125. Opening on the outer surface of the outer cylinder 122 There is an arrow slot 121. The inner cylinder 123 is located inside the outer cylinder 122, the inner cylinder 123 has a smaller diameter than the outer cylinder 122, and the inner cylinder 123 is concentric with the outer cylinder 122. The interlocking column 124 is located inside the inner cylinder 123, the interlocking column 124 is close to the edge of the inner cylinder 123, and the interlocking column 124 is not concentric with the inner cylinder 123. The interlocking column 124 forms an eccentric structure with the inner cylinder 123. The limiting member 125 is located at an end of the linkage post 124, and the limiting member 125 has a larger diameter than the interlocking post 124. The adjustment knob 102 is mounted in a circular hole 112 of the base 101, and the circular hole 112 is located on the front side wall of the base 101. The diameter of the circular hole 102 forms an interference fit with the diameter of the inner cylinder 123. After installation, the inner cylinder 123 is caught in the circular hole 102, and the outer cylinder 122 is located outside the base 101. Since the circular hole and the inner cylinder are in an interference fit relationship, the adjustment knob 102 does not rotate by itself without external force driving, so that the set parameters and the tripping performance can be stabilized. The arrow groove 121 on the outer cylinder 122 has two functions. The first function is to allow the tool to be rotated after being inserted, and the tool is inserted into the arrow groove 121 to provide a rotating external force to rotate the adjustment knob 102. Another effect of the arrow slot 121 is that the arrow can point to a specified value that represents the specified setting current. The value can be engraved on the housing around the circular hole. The function of the linkage post 124 and the limiting member 125 is mainly for interlocking with the linkage member 103. The following will be further described in conjunction with the linkage.
图3揭示了根据本发明的一实施例的热式可调脱扣装置中联动件的结构图。联动件103与调节旋钮102联动,调节旋钮102旋转,联动件103沿调节旋钮的径向移动,联动件103上具有斜面,斜面在沿径向的方向上,具有不同的轴向厚度。为了描述方便,此处以调节旋钮作为参考,限定两个方向,其中一个是调节旋钮的径向方向,即与调节旋钮的各个圆柱的圆柱面平行的方向,另一个是调节旋钮的轴向方向,即与调节旋钮的圆柱的轴线平行的方向。本文中所称的“径向”是指调节旋钮的径向,“轴向”是指调节旋钮的轴向。参考图3所示,联动件103的外侧(图3中所示的背面)为平面,内侧(图3中所示的正面)形成有斜面131,该斜面131在沿着径向的方向上,具有不同的轴向厚度。需要说明的是,斜面131是工作斜面,而斜面133仅仅是为了配合斜面131的形状所设,并不具备实际意义。在不同的是实例中,斜面133可以具有不同的大小,或者不设置 斜面133。联动件103上形成有联动槽132。调节旋钮102的联动柱124位于联动槽132中,由于联动柱124相对于调节旋钮102的中心是偏心的,因此在调节旋钮旋转时,联动柱124会产生径向的位移,联动柱124带动联动件103也沿径向移动。联动柱124的作用是与联动件103联动,因此其不一定要被设置成图示的圆柱形,考虑到在位移过程中,联动柱124在联动件103的联动槽132中还会产生相对旋转,因此圆柱形是一种较好的选择,但并不是必须。联动柱124的直径与联动槽132的直径相匹配。限位件125的作用是限制调节旋钮102与联动件103的轴向相对位移。因此限位件125的直径会大于联动柱124的直径,也大于联动槽132的直径。需要说明的是,此处“直径”具有广泛的含义,至径向的尺寸,即使不规则的形状也具有可测量的径向尺寸。虽然图示的限位件125也是圆柱形,但这并不是必须的。3 is a structural view of a linkage in a thermally adjustable trip device in accordance with an embodiment of the present invention. The linkage member 103 is interlocked with the adjustment knob 102, the adjustment knob 102 is rotated, and the linkage member 103 is moved along the radial direction of the adjustment knob. The linkage member 103 has a sloped surface having a different axial thickness in the radial direction. For convenience of description, the adjustment knob is used herein as a reference to define two directions, one of which is the radial direction of the adjustment knob, that is, the direction parallel to the cylindrical surface of each cylinder of the adjustment knob, and the other is the axial direction of the adjustment knob. That is, the direction parallel to the axis of the cylinder of the adjustment knob. As used herein, "radial" refers to the radial direction of the adjustment knob, and "axial" refers to the axial direction of the adjustment knob. Referring to FIG. 3, the outer side (the back surface shown in FIG. 3) of the link member 103 is a flat surface, and the inner side (the front surface shown in FIG. 3) is formed with a slope 131 which is in the radial direction. Have different axial thicknesses. It should be noted that the inclined surface 131 is a working inclined surface, and the inclined surface 133 is only provided to match the shape of the inclined surface 131, and does not have practical significance. In a different example, the bevels 133 may have different sizes or may not be set Bevel 133. A linkage groove 132 is formed in the linkage 103. The interlocking column 124 of the adjusting knob 102 is located in the interlocking groove 132. Since the interlocking column 124 is eccentric with respect to the center of the adjusting knob 102, when the adjusting knob rotates, the interlocking column 124 generates radial displacement, and the interlocking column 124 drives the linkage. The piece 103 also moves in the radial direction. The function of the linkage post 124 is to interlock with the linkage 103, so it does not have to be arranged in the illustrated cylindrical shape, considering that the linkage post 124 will also have a relative rotation in the linkage groove 132 of the linkage 103 during the displacement process. Therefore, cylindrical is a better choice, but it is not necessary. The diameter of the linkage post 124 matches the diameter of the linkage groove 132. The function of the limiting member 125 is to limit the axial relative displacement of the adjusting knob 102 and the linkage 103. Therefore, the diameter of the limiting member 125 is greater than the diameter of the linkage post 124 and greater than the diameter of the linkage groove 132. It should be noted that "diameter" herein has a broad meaning to the radial dimension, even if the irregular shape has a measurable radial dimension. Although the illustrated stop member 125 is also cylindrical, this is not required.
图4揭示了根据本发明的一实施例的热式可调脱扣装置中推杆的结构图。参考图1和图4,推杆104沿轴向设置。推杆104的第二端形成第二凸起142,第二凸起142与斜面131接触,推杆104的第一端形成第一凸起141,第一凸起141与脱扣连杆接触。如图所示,第二凸起142和第一凸起141并不是与推杆141的本体在一直线上,而是存在一定的径向偏移,如此设计是与推杆104在基座101中的安装位置有关,下面会详细描述。推杆104的第一端还形成有一个端面143,端面143用来安装弹簧105。4 is a structural view of a push rod in a thermal adjustable trip device according to an embodiment of the present invention. Referring to Figures 1 and 4, the push rod 104 is disposed in the axial direction. The second end of the push rod 104 forms a second protrusion 142. The second protrusion 142 is in contact with the inclined surface 131. The first end of the push rod 104 forms a first protrusion 141, and the first protrusion 141 is in contact with the trip link. As shown, the second protrusion 142 and the first protrusion 141 are not in line with the body of the push rod 141, but have a certain radial offset, so designed with the push rod 104 at the base 101. The installation location is related and will be described in detail below. The first end of the push rod 104 is also formed with an end surface 143 for mounting the spring 105.
弹簧105的一端固定在基座101上,弹簧105的另一端固定在推杆104上,在图示的实施例中,固定在端面143上。弹簧105将推杆104的第二凸起142压紧在斜面131上。由于弹簧105的存在,推杆104的第二凸起142始终与斜面131啮合。One end of the spring 105 is fixed to the base 101, and the other end of the spring 105 is fixed to the push rod 104, which is fixed to the end surface 143 in the illustrated embodiment. The spring 105 presses the second projection 142 of the push rod 104 against the ramp 131. Due to the presence of the spring 105, the second projection 142 of the push rod 104 is always engaged with the ramp 131.
参考图5所示,图5揭示了用于安装根据本发明的一实施例的热式可调脱扣装置的基座的部分区域的结构图。如图5所示,基座101上开有圆孔112,圆孔位于基座101的前侧壁上。圆孔112的直径与内圆柱123的直径形成过盈配合。调节旋钮102安装在圆孔112中。基座101在靠近圆 孔112的位置开设有第一槽114,第一槽为径向,联动件103安装在第一槽114中并在第一槽114中滑动。基座101在第一槽的一端开设有第二槽111,第二槽111为轴向,推杆104安装在第二槽111中并在第二槽中滑动。在图5所示的实施例中,在第二槽111的尾段还设置有一个弹簧槽113,弹簧槽113用于放置弹簧105,弹簧105的两端分别固定在推杆的端面143和弹簧槽113的壁上。Referring to FIG. 5, FIG. 5 discloses a structural view of a partial region of a base for mounting a thermally adjustable trip device in accordance with an embodiment of the present invention. As shown in FIG. 5, the base 101 is provided with a circular hole 112 which is located on the front side wall of the base 101. The diameter of the circular hole 112 forms an interference fit with the diameter of the inner cylinder 123. The adjustment knob 102 is mounted in the circular hole 112. Base 101 is near the circle The position of the hole 112 is opened with a first groove 114, the first groove is radial, and the linkage 103 is mounted in the first groove 114 and slides in the first groove 114. The base 101 has a second slot 111 at one end of the first slot. The second slot 111 is axial, and the push rod 104 is mounted in the second slot 111 and slides in the second slot. In the embodiment shown in FIG. 5, a spring groove 113 is further provided at the tail end of the second groove 111. The spring groove 113 is for placing the spring 105. The two ends of the spring 105 are respectively fixed to the end surface 143 of the push rod and the spring. On the wall of the groove 113.
图6和图7揭示了根据本发明的一实施例的热式可调脱扣装置的工作原理,图6和图7对应不同的整定电流,图6对应的整定电流是大电流,图7对应的整定电流是小电流。6 and FIG. 7 disclose the working principle of the thermal adjustable trip device according to an embodiment of the present invention. FIG. 6 and FIG. 7 correspond to different setting currents, and the corresponding setting current of FIG. 6 is a large current, and FIG. 7 corresponds to FIG. The setting current is a small current.
参考图6和图7所示,调节机构中的调节旋钮102、联动件103、推杆104和弹簧105分别安装在基座101上的圆孔、第一槽、第二槽和弹簧槽中。联动件103能径向移动,推杆104能轴向移动。脱扣机构106位于调节机构的侧方,脱扣机构106的脱扣连杆161延伸至调节机构的轴向尾端,脱扣连杆161呈U型,或者说类似U型。脱扣连杆161的第一臂与脱扣机构106连接,脱扣连杆的U型顶点与推杆104的第一凸起141接触,脱扣连杆161的第二臂悬空并与热变形元件107之间保留间隔。热变形元件107位于基座101内,在一个实施例中,热变形元件107是双金属片。该小型短路器所接入的回路中的电流使得双金属片发热变形,变形的双金属片107的一端朝向脱扣连杆161的第二臂移动,与脱扣连杆161的第二臂接触,由于脱扣连杆161的U型顶点被推杆104的第一凸起141顶住,因此当双金属片107继续变形,其一端继续移动时,将推动脱扣连杆161的第二臂,此时脱扣连杆161会以U型顶点为支点转动,脱扣连杆161的第一臂会动作并触发脱扣机构106脱扣,以切断电路。切断电路后,双金属片逐步冷却并恢复原始形状。Referring to FIGS. 6 and 7, the adjustment knob 102, the link member 103, the push rod 104, and the spring 105 in the adjustment mechanism are respectively mounted in the circular hole, the first groove, the second groove, and the spring groove on the base 101. The linkage 103 is radially movable and the pusher 104 is axially movable. The trip mechanism 106 is located on the side of the adjustment mechanism, and the trip link 161 of the trip mechanism 106 extends to the axial tail end of the adjustment mechanism, and the trip link 161 is U-shaped, or similar to a U-shape. The first arm of the trip link 161 is coupled to the trip mechanism 106. The U-shaped apex of the trip link is in contact with the first protrusion 141 of the push rod 104, and the second arm of the trip link 161 is suspended and thermally deformed. Intervals are reserved between elements 107. The thermally deformable element 107 is located within the susceptor 101. In one embodiment, the thermally deformable element 107 is a bimetal. The current in the circuit connected to the small crowbar causes the bimetal to be thermally deformed, and one end of the deformed bimetal 107 moves toward the second arm of the trip link 161 to contact the second arm of the trip link 161. Since the U-shaped apex of the trip link 161 is held by the first protrusion 141 of the push rod 104, when the bimetal 107 continues to deform and one end continues to move, the second arm of the trip link 161 will be pushed. At this time, the trip link 161 will rotate with the U-shaped apex as a fulcrum, and the first arm of the trip link 161 will act and trigger the trip mechanism 106 to trip to cut off the circuit. After the circuit is cut, the bimetal is gradually cooled and restored to its original shape.
继续参考图6和图7所示,旋转调节旋钮102,由于联动柱124的偏心结构,联动柱124会带动联动件103产生径向位移。由于推杆104只能轴向移动,不能径向移动,而推杆104的第二凸起142被弹簧105压紧于 斜面131上,在联动件103径向移动时,第二凸起142与斜面131的不同位置接触,斜面131的不同位置具有不同的轴向厚度,相当于推动推杆104沿轴向移动。因为推杆104是刚性的,所以推杆104第一端的第一凸起141也发生轴向移动,第一凸起141会推动脱扣连杆161的U型顶点轴向移动,相应地,脱扣连杆161的第二臂与双金属片107的一端之间的距离改变。如图所示,由于推杆104是紧靠基座101的一个侧壁设置,因此第二凸起142与推杆104的本体有径向的偏移,以使得第二凸起142能够与斜面131的全部区域接触,获得更大的调节范围。在图示的实施例中,第一凸起141也与推杆104的本体有一定的径向偏移。在图6所示的实施例中,推杆104的第二凸起142与斜面131的较薄处接触,脱扣连杆161的第二臂与双金属片107一端的距离较大,对应较大的整定电流,即需要较大电流,双金属片发生较大的弯曲变形时,脱扣连杆才会触动脱扣机构脱扣。在图7所示的实施例中,推杆104的第二凸起142与斜面131的最厚处接触,脱扣连杆161的第二臂与双金属片107一端的距离较小,对应较小的整定电流,即只需要较小的电流,双金属片发生较小的弯曲变形时,脱扣连杆就会触动脱扣机构脱扣。Continuing with reference to FIGS. 6 and 7, the adjustment knob 102 is rotated, and the linkage post 124 causes the linkage 103 to generate a radial displacement due to the eccentric structure of the linkage post 124. Since the push rod 104 can only move axially, it cannot move radially, and the second protrusion 142 of the push rod 104 is pressed by the spring 105. On the inclined surface 131, when the linkage member 103 moves radially, the second protrusion 142 is in contact with different positions of the inclined surface 131. The different positions of the inclined surface 131 have different axial thicknesses, which is equivalent to pushing the push rod 104 to move in the axial direction. Because the push rod 104 is rigid, the first protrusion 141 of the first end of the push rod 104 also moves axially, and the first protrusion 141 pushes the U-shaped apex of the trip link 161 to move axially, correspondingly, The distance between the second arm of the trip link 161 and one end of the bimetal 107 changes. As shown, since the push rod 104 is disposed against a side wall of the base 101, the second protrusion 142 is radially offset from the body of the push rod 104 so that the second protrusion 142 can be inclined with the bevel The entire area of 131 is in contact for a larger adjustment range. In the illustrated embodiment, the first projection 141 is also offset from the body of the push rod 104 by a certain amount. In the embodiment shown in FIG. 6, the second protrusion 142 of the push rod 104 is in contact with the thinner portion of the inclined surface 131, and the distance between the second arm of the trip link 161 and the end of the bimetal 107 is relatively large. When the large setting current, that is, a large current is required, and the bimetal piece undergoes a large bending deformation, the trip link will touch the trip mechanism to trip. In the embodiment shown in FIG. 7, the second protrusion 142 of the push rod 104 is in contact with the thickest portion of the inclined surface 131, and the distance between the second arm of the trip link 161 and the end of the bimetal 107 is small, corresponding to A small setting current, that is, only a small current is required, and when the bimetal is subjected to small bending deformation, the tripping link will touch the trip mechanism to trip.
图8揭示了采用本发明的一实施例的热式可调脱扣装置的小型断路器的外观结构图。在装配后,在基座101的外壳上能够见到调节旋钮102,在调节旋钮102的周边可以加注数值,数值代表整定电流的调节范围。Fig. 8 is a view showing the appearance of a miniature circuit breaker using a thermally adjustable trip device according to an embodiment of the present invention. After assembly, the adjustment knob 102 can be seen on the outer casing of the base 101, and a value can be added around the adjustment knob 102, the value representing the adjustment range of the setting current.
本发明的小型断路器的热式可调脱扣装置,适用于电动机,尤其是家用电器的小功率电动机。The thermal adjustable trip device of the miniature circuit breaker of the present invention is suitable for a small power motor of an electric motor, especially a household appliance.
本发明的小型断路器的热式可调脱扣装置利用刚性件来调节脱扣连杆与热变形元件之间的距离。刚性件能够确保每一次操作中热变形元件与脱扣连杆之间的距离固定,从而保证脱扣特性的稳定并增加热变形元件的受热弯曲行程及作用力。该热式可调脱扣装置结构简单、制作成本低、体积小。采用本发明的热式可调脱扣装置的小型断路器适用于电动机,尤其是家用电器中的小功率电动机。 The thermally adjustable trip device of the miniature circuit breaker of the present invention utilizes a rigid member to adjust the distance between the trip link and the thermally deformable member. The rigid member ensures that the distance between the thermally deformable member and the trip link is fixed in each operation, thereby ensuring the stability of the tripping characteristic and increasing the heated bending stroke and force of the thermally deformable member. The thermal adjustable trip device has the advantages of simple structure, low manufacturing cost and small volume. The miniature circuit breaker using the thermal adjustable trip device of the present invention is suitable for use in electric motors, especially small power motors in household appliances.
上述实施例是提供给熟悉本领域内的人员来实现或使用本发明的,熟悉本领域的人员可在不脱离本发明的发明思想的情况下,对上述实施例做出种种修改或变化,因而本发明的保护范围并不被上述实施例所限,而应该是符合权利要求书提到的创新性特征的最大范围。 The above embodiments are provided to those skilled in the art to implement or use the present invention, and those skilled in the art can make various modifications or changes to the above embodiments without departing from the inventive concept. The scope of the invention is not limited by the embodiments described above, but should be the maximum range of the inventive features as claimed.

Claims (10)

  1. 一种小型断路器的热式可调脱扣装置,其特征在于,安装在小型断路器的基座内,包括:A thermal adjustable trip device for a miniature circuit breaker, characterized in that it is mounted in a base of a miniature circuit breaker, comprising:
    脱扣机构,脱扣机构具有伸出的脱扣连杆;a tripping mechanism, the tripping mechanism has an extended tripping link;
    热变形元件,热变形元件临近脱扣连杆设置,热变形元件与脱扣连杆之间保留间隔;a heat deformation element, the heat deformation element is disposed adjacent to the trip link, and a space is reserved between the heat deformation element and the trip link;
    调节机构,调节机构调节脱扣连杆与热变形元件之间的间隔的距离;An adjustment mechanism that adjusts a distance between the trip link and the thermally deformable element;
    所述小型断路器所接入的回路中的电流使得热变形元件发热变形,热变形元件变形后朝向脱扣连杆移动,与脱扣连杆接触并推动脱扣连杆,触发脱扣机构脱扣;The current in the circuit connected to the miniature circuit breaker causes the heat deformation element to be thermally deformed, and the heat deformation element moves toward the trip link after being deformed, contacts the trip link and pushes the trip link, and triggers the trip mechanism to be disengaged. buckle;
    调节机构调节热变形元件与脱扣连杆之间的距离以调节回路中整定电流的大小。The adjustment mechanism adjusts the distance between the thermally deformable element and the trip link to adjust the magnitude of the set current in the loop.
  2. 如权利要求1所述的小型断路器的热式可调脱扣装置,其特征在于,A thermally adjustable trip device for a miniature circuit breaker according to claim 1, wherein
    所述调节机构包括推杆,推杆的第一端与脱扣连杆接触,推杆的第二端与一斜面接触,调节推杆的第二端与所述斜面接触的位置,推杆的第一端相应调节脱扣连杆的位置,以调节热变形元件与脱扣连杆之间的距离。The adjusting mechanism includes a push rod, the first end of the push rod is in contact with the trip link, the second end of the push rod is in contact with a slope, and the position of the second end of the push rod contacting the inclined surface is adjusted, and the push rod is The first end adjusts the position of the trip link accordingly to adjust the distance between the thermally deformable element and the trip link.
  3. 如权利要求2所述的小型断路器的热式可调脱扣装置,其特征在于,所述调节机构包括:A thermal adjustable trip device for a miniature circuit breaker according to claim 2, wherein said adjustment mechanism comprises:
    调节旋钮,调节旋钮能旋转;Adjust the knob, the adjustment knob can be rotated;
    联动件,与调节旋钮联动,调节旋钮旋转,联动件沿调节旋钮的径向移动,联动件上具有所述斜面,所述斜面在沿径向的方向上,具有不同的轴向厚度;The linkage member is coupled with the adjustment knob, the adjustment knob is rotated, and the linkage member moves along the radial direction of the adjustment knob, and the linkage member has the inclined surface, and the inclined surface has different axial thicknesses in the radial direction;
    推杆,推杆沿轴向设置,推杆的第一端形成第一凸起,第一凸起与脱扣连杆接触,推杆的第二端形成第二凸起,第二凸起与所述斜面接触; a push rod, the push rod is disposed in the axial direction, the first end of the push rod forms a first protrusion, the first protrusion is in contact with the trip link, the second end of the push rod forms a second protrusion, and the second protrusion is The slope contact;
    弹簧,弹簧的一端固定在基座上,弹簧的另一端固定在推杆上,弹簧将推杆的第二凸起压紧在所述斜面上。a spring, one end of the spring is fixed on the base, and the other end of the spring is fixed on the push rod, and the spring presses the second protrusion of the push rod against the inclined surface.
  4. 如权利要求3所述的小型断路器的热式可调脱扣装置,其特征在于,所述调节旋钮包括:A thermal adjustable trip device for a miniature circuit breaker according to claim 3, wherein said adjustment knob comprises:
    外圆柱,外圆柱的外表面上开有箭头槽;An outer cylinder having an arrow groove on an outer surface of the outer cylinder;
    内圆柱,内圆柱位于外圆柱的内侧,内圆柱的直径小于外圆柱,内圆柱与外圆柱同心;An inner cylinder, the inner cylinder is located on the inner side of the outer cylinder, the inner cylinder has a smaller diameter than the outer cylinder, and the inner cylinder is concentric with the outer cylinder;
    联动柱,联动柱位于内圆柱的内侧,联动柱靠近内圆柱的边缘,联动柱与内圆柱不同心;The linkage column, the linkage column is located inside the inner cylinder, the linkage column is close to the edge of the inner cylinder, and the linkage column is not concentric with the inner cylinder;
    限位件,位于联动柱的端部,限位件的直径大于联动柱。The limiting member is located at the end of the linkage column, and the diameter of the limiting member is larger than the linkage column.
  5. 如权利要求4所述的小型断路器的热式可调脱扣装置,其特征在于,A thermal adjustable trip device for a miniature circuit breaker according to claim 4, wherein
    所述联动件的外侧为平面,内侧形成有所述斜面,联动件上形成有联动槽,所述联动柱位于所述联动槽中,调节旋钮旋转,联动柱带动所述联动件沿径向移动,所述限位件限制调节旋钮与联动件的轴向相对位移。The outer side of the linkage is a flat surface, and the inclined surface is formed on the inner side. The linkage is formed with a linkage groove. The linkage column is located in the linkage groove, the adjustment knob rotates, and the linkage column drives the linkage to move in the radial direction. The limiting member limits the axial relative displacement of the adjusting knob and the linkage.
  6. 如权利要求5所述的小型断路器的热式可调脱扣装置,其特征在于,A thermally adjustable trip device for a miniature circuit breaker according to claim 5, wherein
    所述基座上开有圆孔,所述调节旋钮安装在圆孔中;a circular hole is formed in the base, and the adjusting knob is installed in the circular hole;
    所述基座在靠近圆孔的位置开设有第一槽,第一槽为径向,所述联动件在第一槽中滑动;The base is provided with a first slot near the circular hole, the first slot is radial, and the linkage slides in the first slot;
    所述基座在第一槽的一端开设有第二槽,第二槽为轴向,所述推杆在第二槽中滑动。The base is provided with a second slot at one end of the first slot, the second slot is axial, and the push rod slides in the second slot.
  7. 如权利要求6所述的小型断路器的热式可调脱扣装置,其特征在于,所述圆孔的直径与所述内圆柱的直径形成过盈配合。 The thermal adjustable trip device of a miniature circuit breaker according to claim 6, wherein the diameter of the circular hole forms an interference fit with the diameter of the inner cylinder.
  8. 如权利要求6所述的小型断路器的热式可调脱扣装置,其特征在于,A thermally adjustable trip device for a miniature circuit breaker according to claim 6, wherein
    所述脱扣连杆呈U型,脱扣连杆的第一臂与脱扣机构连接,脱扣连杆的U型顶点与推杆的第二凸起接触,脱扣连杆的第二臂与热变形元件之间保留间隔。The trip link is U-shaped, the first arm of the trip link is connected with the trip mechanism, the U-shaped apex of the trip link is in contact with the second protrusion of the push rod, and the second arm of the trip link The spacing is reserved from the thermally deformable element.
  9. 如权利要求8所述的小型断路器的热式可调脱扣装置,其特征在于,A thermally adjustable trip device for a miniature circuit breaker according to claim 8 wherein:
    所述热变形元件是双金属片,电流使得双金属片发热变形,双金属片的一端朝向脱扣连杆的第二臂移动,与脱扣连杆的第二臂接触并推动脱扣连杆的第二臂,脱扣连杆的第一臂触发脱扣机构脱扣。The heat deformation element is a bimetal piece, and the current causes the bimetal piece to be thermally deformed, and one end of the bimetal piece moves toward the second arm of the trip link, contacts the second arm of the trip link and pushes the trip link The second arm of the trip link triggers the trip mechanism to trip.
  10. 如权利要求1-9中任一项所述的小型断路器的热式可调脱扣装置,其特征在于,所述小型断路器用于电动机。 A thermally adjustable trip device for a miniature circuit breaker according to any of claims 1-9, wherein the miniature circuit breaker is for an electric motor.
PCT/CN2015/096096 2014-12-30 2015-12-01 Adjustable thermal tripping device for miniature circuit breaker WO2016107364A1 (en)

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EP15875042.2A EP3242313B1 (en) 2014-12-30 2015-12-01 Adjustable thermal tripping device for miniature circuit breaker
ES15875042T ES2785406T3 (en) 2014-12-30 2015-12-01 Adjustable thermal trip device for miniature circuit breaker

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EP3242313B1 (en) 2020-01-29
EP3242313A4 (en) 2018-07-04

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