WO2017059821A1 - 触头系统、和包括触头系统的接触器 - Google Patents
触头系统、和包括触头系统的接触器 Download PDFInfo
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- WO2017059821A1 WO2017059821A1 PCT/CN2016/101655 CN2016101655W WO2017059821A1 WO 2017059821 A1 WO2017059821 A1 WO 2017059821A1 CN 2016101655 W CN2016101655 W CN 2016101655W WO 2017059821 A1 WO2017059821 A1 WO 2017059821A1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/54—Contact arrangements
Definitions
- the present invention relates to the field of low voltage electrical appliances, and more particularly to a contact system, and a contactor including the contact system.
- a contactor is an electrical appliance that uses a magnetic field generated by a current flowing through a coil to close the contacts to control the load.
- the contactor mainly includes three parts: an electromagnetic system, a contact system, and an arc extinguishing system.
- the electromagnetic system includes a moving iron core, a static iron core, and an electromagnetic coil, wherein the electromagnetic coil and the static iron core are not moving under working conditions; the moving iron core is movable.
- the electromagnetic coil is energized, the electromagnetic attraction generated by the static iron core will pull the movable iron core. Since the contact system is linked with the moving iron core, the moving iron core drives the moving contact in the contact system to simultaneously operate and the static in the contact system. The contacts are closed to turn the power on.
- the arc extinguishing system mainly comprises an arc extinguishing device for extinguishing an arc generated when the moving contact and the static contact in the contact system are closed or opened.
- the current contact system of most small current ( ⁇ 100A) contactors is set as follows: the contact support member can move up and down, and the contact support member is provided with a hole; the movable contact is placed on the contact support member. In the hole, and the movable contact is provided with an elastic member; when the contactor is closed, the movable contact moves up and down with the contact support member until it contacts with the static contact, and the contact support member continues to move to generate an overtravel; When the device is disconnected, it is the opposite of this process.
- the contact system of most large current (>100A) contactors is set as follows: moving contacts are arranged on the contact supporting members; the moving contacts are generally bridge moving contacts, and the silver alloy contacts are symmetrically welded at the front and rear positions.
- An unclosed notch is provided at each of the left and right sides of the middle portion, and the spring support member is clamped and guided by the bridge movable contact through the unclosed notch (for example, the LC1-F500 AC contactor manufactured by Schneider, the domestically produced CJ20- 250 AC contactor, etc.), or central setting Two left and right symmetrical closed notches, such as "mouth" shaped notches, through which the spring support members are guided by the bridge moving contacts (for example, 3TF-52 AC contactor manufactured by Siemens, SC manufactured by Fuji Corporation) -N10 AC contactor, etc.).
- the contact area is too large, deformation is inevitable at the time of manufacturing the contact, resulting in uneven surface of the contact.
- the contactor of the contact system adopting the single-moving contact structure when the movable contact and the fixed contact are closed, the actual contact area of the large contact is small, and the temperature rise of the product is too high due to too much contact resistance. This leads to rapid aging of plastic parts, reduces the mechanical strength of the metal parts of the conductive parts, and even burns the contactors.
- a contactor of a contact system employing a multi-moving contact structure (the contact system includes at least two movable contacts) has been proposed.
- the contact system of such a multi-moving contact structure is divided into two structures: (1) a simple copy of the contact system of the single-moving contact structure, the contact system of the multi-moving contact structure comprising at least two contacts Group, each contact set includes a spring support member, a contact support member, a bridge movable contact, a shaft (or no shaft), and at least two such contact groups move simultaneously (for example, Schneider The company's LC1-F1700 AC contactor); (2) Improved replication of the contact system of the single-moving contact structure, the contact system of the multi-moving contact structure comprising at least two bridge contact sets, each bridge The contact set includes a spring support member, a bridge moving contact, a shaft (or no shaft), and all the bridge contact groups are placed together on one contact support member (for example, ABB's AF1650 AC contact) Device).
- the present invention provides a novel contact system, and a contactor including the contact system.
- a contact system includes: a contact supporting member having an upper end provided with positioning means capable of moving up and down in the contact supporting member, the positioning device having at least two arms; at least two first dynamic touches a head, the at least two first movable contacts respectively having at least two contacts and respectively mounted on at least two arms of the positioning device; and a stationary contact having at least two first movements A contact corresponding to the contact of the contact, wherein a first movable contact is mounted on each arm of the positioning device.
- a contact system further comprising: at least one second movable contact, each of the at least one second movable contact having at least two contacts and mounted in parallel with the at least two first movable contacts Between at least two arms of the positioning device, wherein the stationary contact further has a contact corresponding to the contact of the at least one second movable contact.
- At least one of the movable contacts including the at least two first movable contacts and the at least one second movable contact is not in contact with other movable contacts
- the head is simultaneously closed or disconnected from the stationary contact, and the contact of the at least one movable contact and the corresponding contact on the fixed contact are compared with the contact and/or the fixed contact of the other movable contact
- the contacts corresponding to other moving contacts are made of a material having high electrical resistivity and high arc resistance.
- a first elastic member is disposed above each of the first movable contacts, and a second elastic member is disposed above each of the second movable contacts.
- a first arc angle is disposed between each of the first movable contacts and the first elastic member above the second movable member, and a second arc angle is disposed between each of the second movable contacts and the second elastic member above the second movable member .
- the positioning device is a "U” type, "H” type, “E” type, inverted “E” type structure, a first movable contact, a first elastic member, and
- the middle portion of the first arc angle is provided with a rectangular, circular, elliptical, L-shaped, T-shaped, Y-shaped, triangular, polygonal, or profiled positioning structure.
- a contactor in accordance with an embodiment of the invention includes an electromagnetic system, an arc extinguishing system, and a contact system as described above.
- the contact system and contactor according to an embodiment of the present invention are compared with the existing contact system and contactor, since at least two of the movable contacts in the contact system are positioned and guided by at least two arms of the positioning device, The space is saved, so that the volume of the same current level product is much smaller than the existing products in the market.
- the contact system including a plurality of moving contacts greatly reduces the contact resistance compared to the contact system having a single moving contact, so that the temperature rise of the contact system can be reduced. Furthermore, by providing a plurality of moving contacts included in the contact system and simultaneously closing and/or opening the static contacts, the burning of the moving contact of the arc when the contact system is closed or disconnected is reduced, thereby improving The electrical life of the contact system.
- FIG. 1 is a schematic view of a positioning device in a contact system in accordance with an embodiment of the present invention
- FIG. 2 is a schematic illustration of a contact support member in a contact system in accordance with an embodiment of the present invention
- FIG. 3 is a schematic view showing the assembly of a contact supporting member and a positioning device in a contact system according to an embodiment of the present invention
- Figure 4 is an exploded view of a contact system in accordance with a first embodiment of the present invention.
- Figure 5 is an exploded view of the movable contact, the arc angle, and the elastic member according to the first embodiment of the present invention
- Figure 6 is an assembled view of a contact system in accordance with a first embodiment of the present invention.
- Figure 7 is an assembled cross-sectional view of a contact system in accordance with a first embodiment of the present invention.
- Figure 8 is a schematic illustration of a contactor employing a contact system in accordance with a first embodiment of the present invention
- Figure 9 is an assembled view of a contact system in accordance with a second embodiment of the present invention.
- FIG. 1 is a schematic illustration of a positioning device in a contact system in accordance with an embodiment of the present invention.
- 2 is a schematic illustration of a contact support member in a contact system in accordance with an embodiment of the present invention.
- the positioning device 110 is a U-shaped structure having two arms 111 and a shaft 112 spanning between the two arms 111; as shown in FIG.
- the upper surface of the contact supporting member 100 of the embodiment of the present invention is provided with two steps 104 and 105, and the upper surface of the contact supporting member 100 is divided into three planes 101, 102, and 103 by the steps 104 and 105, wherein the plane 102 is 1 mm lower than the position of the plane 101 and the plane 103 (it is to be noted that the contact supporting member 100 can move up and down in the contactor); as shown in FIG.
- the two arms 111 of the positioning device 110 respectively pass through the rectangular holes on the surfaces 101 and 103 of the contact support member 100, and the positioning device 110 can move up and down with respect to the contact support member 100.
- FIG. 4 is an exploded view of a contact system in accordance with a first embodiment of the present invention.
- Figure 5 is an exploded view of the movable contact, the arc angle, and the elastic member in accordance with the first embodiment of the present invention.
- Figure 6 is an assembled view of a contact system in accordance with a first embodiment of the present invention.
- Figure 7 is an assembled cross-sectional view of a contact system in accordance with a first embodiment of the present invention.
- the movable contact 120 is disposed on the two arms 111 of the positioning device 110 through the rectangular positioning holes of the intermediate portion thereof, and is supported on the surfaces 101 and 103 of the contact supporting member 100;
- the arc angle 140 and the elastic member 130 are sequentially disposed on the two arms 111 of the positioning device 110 through the rectangular positioning holes at their intermediate portions, and are supported on the surface 101 of the contact supporting member 100 in cooperation with the movable contact 120 and 103 (where the arc angle 140 is pressed against the moving contact 120, the elastic member 130 is pressed against the arc angle 140); the shaft 112 of the positioning device 110 spanning the two arms 111 is pressed against the elastic member 130 to define the movement
- the contacts 120, the arc angles 140, and the resilient members 130 are positioned such that they do not slip off the upper ends of the two arms 111 of the positioning device 110; at the same time, the moving contacts 160, the arc angles 170, and the elastic members 150 are supported at Contact support member 100 On the surface 102, the shaft 11
- the movable contact 120 is a bridge movable contact, and the front and rear positions are symmetrically disposed with the contact 122 and the contact 123 (ie, the front and rear two symmetric pier positions are respectively provided with the contact 122 and the contact 123
- the middle portion is a positioning structure 121 (which is a rectangular hole) of the movable contact 120.
- One arm 111 of the positioning device 110 passes through a rectangular hole in the middle portion of the movable contact 120 to position and guide the movable contact 120.
- the movable contact 160 has a similar structure to the movable contact 120 (except that the positioning structure is not provided at its intermediate position).
- a contact system in accordance with a first embodiment of the present invention includes a moving contact subsystem and a single stationary contact 180.
- the movable contact subsystem includes a contact support member 100, a positioning device 110, two movable contacts 120 respectively passing through the two arms 111 of the positioning device 110, and an arc angle 140 and an elastic member 130 thereon, and The movable contact 160 between the two arms 111 of the positioning device 110 and in parallel with the movable contact 120 (and the arc angle 140 and the elastic member 130 thereon) and the arc angle 170 and the elastic member 150 thereon.
- the plane 101 and the plane 103 of the contact support member 100 support the movable contact 120 and its arc angle 140 and the elastic member 130, the plane of the contact support member 100.
- 102 supports the movable contact 160 and its arc angle 170 and the elastic member 150;
- the intermediate portions of the movable contact 120, the elastic member 130, and the arc angle 140 are respectively provided with rectangular positioning holes, and the holes respectively pass through two of the positioning devices 110
- the arm 111; the shaft 112 of the two arms 111 spanning the positioning device 110 is pressed against the elastic member 130 and the elastic member 150; three movable contacts respectively supported by the three planes 101, 102, and 103 of the contact supporting member 100
- the two arms 111 of the headrest positioning device 110, and the step 104 of the contact support member 100 and the step 105 are commonly guided and positioned; since the plane 102 of the contact support member 100 is located 1 mm lower than the position of the plane 101 and the plane 103, it is located The movable contact 160 on the plane
- the static contact 180 in the contact system has two contact points with the movable contact 120 and two contact phases of the movable contact 160, respectively.
- Corresponding Contacts (six contacts in total) that are on the same plane and are of uniform height; since the moving contacts 160 on the plane 102 of the contact support member 100 are at a plane 101 that is located on the contact support member 100 The position of the movable contact 120 on the plane 103 is 1 mm lower, and all the contact heights of the fixed contact 180 are uniform, so the movable contact 160 on the plane 102 of the contact support member 100 is located closer to the contact support member 100.
- the opening distance of the movable contact 120 on the plane 101 and the plane 103 is 1 mm, which is an arc contact.
- the contact of the movable contact 160 and the contact of the movable contact with the contact of the movable contact 160 are compared with the contact of the movable contact 120 and/or the contact of the movable contact 120 with the movable contact 120.
- Corresponding contacts are made of materials with high electrical resistivity and strong arc resistance.
- the contact of the movable contact 160 is made of a silver-tungsten alloy
- the corresponding contact on the fixed contact is a silver-tungsten carbide alloy
- all other contacts are made of a silver-tin oxide alloy (or silver-oxidized). Cadmium alloy).
- the movable contacts 120 and 160 can also adopt the contacts of the same material, and the contacts on the fixed contacts corresponding to the contacts of the movable contacts 120 and 160 can also be the same. s material.
- the contact closing process in the contact system shown in FIGS. 6 and 7 is as follows: when the contact supporting member 100 drives the movable contact 160 and the two movable contacts 120 to move downward, the opening distance is small.
- the movable contact 160 ie, the arc contact
- the movable contact 160 is closed before the two movable contacts 120 and the fixed contact 180; when the two movable contacts 120 have not been closed with the fixed contact 180 and the movable contact 160 (ie, the arc When the contact) has been closed with the stationary contact 180, all of the current is concentrated on the moving contact 160 (ie, the arcing contact); when the contact supporting member 100 continues after the moving contact 160 and the stationary contact 180 are closed
- the movable contact 160 and the two movable contacts 120 are closed with the static contact 180, and the current is distributed to each movable contact, and the circuit starts to normally and balancedly turn on the current;
- the head 160 and the two movable contacts 120 are simultaneously turned on, and the contact resistance between the movable contact 120
- the contact breaking process in the contact system shown in FIGS. 6 and 7 is as follows: when the contact supporting member 100 drives the two movable contacts 120 and the movable contact 160 to move upward, the opening distance is small.
- the movable contact 160 ie, the arc contact
- the movable contact 160 is disconnected from the fixed contact 180 after the movable contact 120; when the movable contact 120 is disconnected from the fixed contact 180 and the movable contact 160 (ie, the arc contact)
- all current is concentrated on the movable contact 160 (ie, the arc contact); when the two movable contacts 120 are disconnected from the fixed contact 180, there is no breaking current, so there is no Arc; when the contact support member 100 continues to move such that the movable contact 160 (ie, the arc contact) is also disconnected from the fixed contact 180, all current is accumulated on the movable contact 160 (ie, the arc contact)
- An arc is generated; after the arc is extinguished by the arc extinguishing system
- the arc generated when the movable contact 160 is disconnected from the fixed contact 180 burns the movable contact 160 (ie, the arc contact) while protecting the other two movable contacts 120 from being substantially burned, thus
- the electrical life of the contact system can be increased.
- the contact of the movable contact 160 and the corresponding contact on the fixed contact 180 are made of a material having high resistivity and strong arc resistance (for example, silver-tungsten alloy and silver-tungsten carbide, respectively). Alloys), so they have strong arc resistance, so that the electrical life of the moving contact 160 (ie, the arc contact) can be improved.
- Figure 8 is a schematic illustration of a contactor employing a contact system in accordance with a first embodiment of the present invention. As shown in Fig. 8, the contactor using the contact system according to the first embodiment of the present invention is small in volume and large in capacity.
- the contact support member 100 is moved downward; the contact support member 100 drives the movable contacts 120 and 160 to move downward, so that the movable contact 160 (ie, the arc contact) first contacts the fixed contact 180; the contact support After the component 100 continues to move downward by 1 mm, the contact resistance between the movable contact 160 and the two movable contacts 120 and the fixed contact 180 is lowered; the contact support member 100 continues to move downward by a certain distance until the moving iron core and the static iron core are completely
- the closure process is completed when closed.
- the above process realizes the function that the contactor is turned on and the electric device (for example, an electric motor or the like) is energized.
- the contact support member 100 moves upwards, so that the two moving contacts 120 and the static contact 180 are first disconnected; at this time, the moving contact 160 (ie, the arc contact) and the static contact with a small opening distance are 180 is still in the closed state; after the contact support member 100 continues to move upward by 1 mm, the movable contact 160 (ie, the arc contact) having a small opening distance is disconnected from the static contact 180, and an arc is generated; The smaller moving contact 160 (arc contact) and the static contact 180 introduce the arc into the arc extinguishing system to extinguish the arc; the contact supporting member 100 continues to move upward by a certain distance (contact opening distance) until the moving iron core and the static iron core It is fully open.
- a certain distance contact opening distance
- the contact system is in the open position shown in FIG.
- the two movable contacts 120 are first disconnected from the static contact 180, but the movable contact 160 and the fixed contact 180 having a small open distance are still in a closed state, and all current passes through the movable contact 160, so two
- the contact support member 100 continues to move upward, the arc is generated when the movable contact 160 is disconnected from the static contact 180, and the movable contact 160 is an arc contact, two
- the moving contact 120 is not burned, thereby increasing the electrical life of the contact system.
- the above process realizes the contactor breaking circuit, so that electrical equipment (for example, an electric motor, etc.) realizes the function of stopping the power.
- the positioning device 110 may have two arms, a "U” type, an "H” type structure; or may have three or more arms, an "E” type, an inverted “E” type structure, and the like.
- the movable contact 120, the arc angle 140, and the rectangular positioning hole of the middle portion of the elastic member 130 may be replaced by a circular, elliptical, L-shaped, T-shaped, Y-shaped, triangular, polygonal, shaped positioning structure, etc., as long as The movable contact 120, the arc angle 140, and the elastic member 130 can be movably mounted on one arm of the positioning device 110.
- Figure 9 is an assembled view of a contact system in accordance with a second embodiment of the present invention.
- the contact system includes five moving contacts (the outermost two moving contacts 120, the middlemost moving contact 200, and the second outer moving contact 160, respectively), and A single stationary contact 180.
- the most middle movable contact 200 and the second outer movable contact 160 are sequentially provided with an arc angle and an elastic member having no positioning structure at the intermediate portion, and the outermost two movable contacts 120 and the upper portion thereof are sequentially disposed.
- the arc angle and the elastic members are disposed on the two arms 111 of the positioning device 110 through the positioning structures of their intermediate portions.
- the contact positions of the five movable contacts 120, 200, 160 are highly uniform, but the contact position of the most intermediate movable contact 200 is farther than the contact position of the movable contact 120 and the movable contact 160 from the middle portion thereof.
- the static contact 180 is provided with contacts at corresponding positions of the five movable contact contacts, and the static contact corresponding to the middlemost movable contact 200 is 1.5 mm higher than the other four static contacts.
- the middlemost moving contact 200 is the outermost two moving contacts 120 and the second outer The two movable contacts 160 on the side are 1.5 mm apart, and the most middle movable contact 200 is an arc contact.
- the moving contacts 120 and 160 herein are the moving contacts 120 and 160 described above in connection with FIGS. 4-7, and the moving contact 200 has a similar structure to the moving contact 160 (except that the moving contact 200 is different than the moving contact 160). Other than longer).
- the contact system and contactor according to an embodiment of the present invention are compared with the existing contact system and contactor, since at least two of the movable contacts in the contact system are positioned and guided by at least two arms of the positioning device, The space is saved, so that the volume of the same current level product is much smaller than the existing products in the market.
- the contact system including a plurality of moving contacts greatly reduces the contact resistance compared to the contact system having a single moving contact, so that the temperature rise of the contact system can be reduced. Furthermore, by providing a plurality of moving contacts included in the contact system and simultaneously closing and/or opening the static contacts, the burning of the moving contact of the arc when the contact system is closed or disconnected is reduced, thereby improving The electrical life of the contact system.
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Abstract
一种触头系统和包括触头系统的接触器。该触头系统包括触头支持部件（100），其上端设置有能够在触头支持部件（100）中上下运动的定位装置（110），该定位装置（110）具有至少两条臂（111）；至少两个第一动触头（120），该至少两个第一动触头（120）分别具有至少两个触点（122、123）并且分别被安装在定位装置（110）的至少两条臂（111）上；以及静触头（180），该静触头（180）具有与至少两个第一动触头（120）的触点（122、123）相对应的触点，其中，定位装置（110）的每条臂（111）上安装一个第一动触头（120）。该触头系统和接触器相比传统的触头系统和接触器体积更小，能节省控制柜中的空间。
Description
本发明涉及低压电器领域，更具体地涉及一种触头系统、和包括触头系统的接触器。
接触器(Contactor)是指利用电流流过线圈产生的磁场使触头闭合，以控制负载的电器。具体地，接触器主要包括电磁系统、触头系统、和灭弧系统三部分。电磁系统包括动铁心、静铁心、和电磁线圈，其中电磁线圈和静铁心在工作状态下是不动的；动铁心则是可动的。当电磁线圈通电时，静铁心产生的电磁吸力将动铁心吸合，由于触头系统是与动铁心联动的，因此动铁心带动触头系统中的动触头同时运行与触头系统中的静触头闭合，从而接通电源。当电磁线圈断电时，静铁芯产生的电磁吸力消失，动铁心与静铁芯分离并且带动触头系统中的动触头与静触头断开，从而切断电源。灭弧系统主要包括灭弧装置，用于对触头系统中的动触头和静触头闭合或断开时产生的电弧进行灭弧。
目前的多数小电流(＜100A)接触器的触头系统被如下设置：触头支持部件可上下运动，且触头支持部件上设置有孔；动触头被放置在触头支持部件上设置的孔中，并且动触头上设置有弹性件；当接触器闭合时，动触头随触头支持部件上下运动直到与静触头接触为止，而触头支持部件继续运动，产生超程；接触器断开时，与此过程相反。
目前的多数大电流(＞100A)接触器的触头系统被如下设置：在触头支持部件上设置动触头；动触头一般为桥形动触头，其前后位置对称焊接银合金触点，中部左右边线处各设置一个不封闭的缺口，弹簧支持部件夹持并通过不封闭的缺口为桥形动触头导向(例如，施耐德公司生产的LC1-F500交流接触器、国内生产的CJ20-250交流接触器等)，或者中部设置
两个左右对称的封闭缺口，如“口”字形缺口，弹簧支持部件通过此两个封闭缺口为桥形动触头导向(例如，西门子公司生产的3TF-52交流接触器、富士公司生产的SC-N10交流接触器等)。
在大电流接触器中，因为触点面积太大，所以在触头制造时难免会有变形，造成触头表面不平整。在采用单动触头结构的触头系统的接触器中，当动触头和静触头闭合时，大片的触点实际接触面积很小，容易因接触电阻太大造成产品温升过高，导致塑料件快速老化，降低导电部分金属件的机械强度，甚至烧损接触器。
所以，提出了一种采用多动触头结构的触头系统的接触器(触头系统包括至少两个动触头)。这样的多动触头结构的触头系统分为两种结构：(一)、单动触头结构的触头系统的简单复制，该多动触头结构的触头系统包括至少两个触头组，每个触头组均包括一个弹簧支持部件、一个触头支持部件、一个桥形动触头、一个轴(或者不设轴)，至少两个这样的触头组同时运动(例如，施耐德公司的LC1-F1700交流接触器)；(二)、单动触头结构的触头系统的改进复制，该多动触头结构的触头系统包括至少两个桥形触头组，每个桥形触头组包括一个弹簧支持部件、一个桥形动触头、一个轴(或者不设轴)，所有桥形触头组共同放置在一个触头支持部件上(例如，ABB公司的AF1650交流接触器)。
在以上所述的采用多动触头结构的触头系统的接触器中，由于触头系统中的各动触头并列排布，造成相互之间需要避位，故而体积大、浪费空间。另外，虽然这样的采用多动触头结构的触头系统的接触器特别适用于大电流，能明显改善接触器的温升，但是外形尺寸过大，使得用户使用时大量浪费控制柜的空间。同时，这样的采用多动触头结构的触头系统的接触器在每次闭合或断开时，其中的所有动触头同时闭合、断开，即所有动触头同时承担电弧，使得接触器易烧损，电气寿命不高。
发明内容
鉴于上述一个或多个问题，本发明提供了一种新颖的触头系统、和包括触头系统的接触器。
根据本发明实施例的触头系统，包括：触头支持部件，其上端设置有能够在触头支持部件中上下运动的定位装置，该定位装置具有至少两条臂；至少两个第一动触头，该至少两个第一动触头分别具有至少两个触点并且分别被安装在定位装置的至少两条臂上；以及静触头，该静触头具有与上述至少两个第一动触头的触点相对应的触点，其中，定位装置的每条臂上安装一个第一动触头。
根据本发明实施例的触头系统，还包括：至少一个第二动触头，该至少一个第二动触头分别具有至少两个触点并且与上述至少两个第一动触头并行地安装在定位装置的至少两条臂之间，其中，静触头还具有与上述至少一个第二动触头的触点相对应的触点。
在根据本发明实施例的触头系统中，包括上述至少两个第一动触头和上述至少一个第二动触头在内的所有动触头中的至少一个动触头不与其它动触头同时和静触头闭合或断开，且该至少一个动触头的触点和静触头上与之相对应的触点相比其它动触头的触点和/或静触头上与其他动触头相对应的触点采用电阻率高、耐电弧能力强的材料。
在根据本发明实施例的触头系统中，在每个第一动触头上方设置有第一弹性件，并且在每个第二动触头上方设置有第二弹性件。另外，在每个第一动触头与其上方的第一弹性件之间设置有第一弧角，并且在每个第二动触头与其上方的第二弹性件之间设置有第二弧角。
在根据本发明实施例的触头系统中，定位装置为“U”型、“H”型、“E”型、倒“E”型的结构，第一动触头、第一弹性件、以及第一弧角的中间部位设置有矩形、圆形、椭圆形、L型、T型、Y型、三角形、多边形、或者异形的定位结构。
根据本发明实施例的接触器，包括电磁系统、灭弧系统、以及如上所述的触头系统。
根据本发明实施例的触头系统和接触器与现有触头系统和接触器相比，由于触头系统中至少有两个动触头由定位装置的至少两条臂进行定位和导向，所以节约了空间，从而使得同电流等级产品的体积远远小于市场现有产品。
另外，根据本发明实施例的包括多个动触头的触头系统相比具有单个动触头的触头系统大大降低了接触电阻，从而可以降低触头系统的温升。再者，通过设置触头系统包括的多个动触头不同时与静触头闭合和/或断开，减小了触头系统闭合或断开时电弧对动触头的烧损，从而提高了触头系统的电气寿命。
本申请的下列附图在此作为本申请的一部分用于理解本申请。附图中示出的实施方式及其描述用来解释本发明的原理。在附图中：
图1是根据本发明实施例的触头系统中的定位装置的示意图；
图2是根据本发明实施例的触头系统中的触头支持部件的示意图；
图3是根据本发明实施例的触头系统中的触头支持部件与定位装置的组装示意图；
图4是根据本发明第一实施例的触头系统的爆炸图；
图5是根据本发明第一实施例的动触头、弧角、及弹性件的爆炸图；
图6是根据本发明第一实施例的触头系统的组装示意图；
图7是根据本发明第一实施例的触头系统的组装剖视图；
图8是采用根据本发明第一实施例的触头系统的接触器的示意图；
图9是根据本发明第二实施例的触头系统的组装示意图。
下面将详细描述本发明的各个方面的特征和示例性实施例。在下面的详细描述中，提出了许多具体细节，以便提供对本发明的全面理解。但是，对于本领域技术人员来说很明显的是，本发明可以在不需要这些具体细节中的一些细节的情况下实施。下面对实施例的描述仅仅是为了通过示出本发明的示例来提供对本发明的更好的理解。本发明决不限于下面所提出的任何具体配置和算法，而是在不脱离本发明的精神的前提下覆盖了元素、部件和算法的任何修改、替换和改进。在附图和下面的描述中，没有示出公知的结构和技术，以便避免对本发明造成不必要的模糊。
下面结合附图，详细说明根据本发明实施例的触头系统、和采用该触
头系统的接触器。
图1是根据本发明实施例的触头系统中的定位装置的示意图。图2是根据本发明实施例的触头系统中的触头支持部件的示意图。图3是根据本发明实施例的触头系统中的触头支持部件与定位装置的组装示意图。下面参考图1至图3，详细说明根据本发明实施例的触头系统中的定位装置、触头支持部件、及它们二者的组装关系。
具体地，如图1所示，根据本发明实施例的定位装置110为U型结构，具有两条臂111、以及横跨在两条臂111之间的轴112；如图2所示，根据本发明实施例的触头支持部件100的上表面上设置有两个台阶104和105，触头支持部件100的上表面被台阶104和105分割成三个平面101、102、和103，其中平面102比平面101和平面103的位置低1mm(需要说明的是，触头支持部件100在接触器中可上下运动)；如图3所示，当触头支持部件100与定位装置110组装在一起时，定位装置110的两条臂111分别穿过触头支持部件100的表面101和103上的矩形孔，并且定位装置110可相对于触头支持部件100上下运动。
图4是根据本发明第一实施例的触头系统的爆炸图。图5是根据本发明第一实施例的动触头、弧角、及弹性件的爆炸图。图6是根据本发明第一实施例的触头系统的组装示意图。图7是根据本发明第一实施例的触头系统的组装剖视图。下面参考图4至图7，详细说明根据本发明第一实施例的触头系统。
如图4至图6所示，动触头120通过其中间部位的矩形定位孔被设置在定位装置110的两条臂111上，并且被支撑在触头支持部件100的表面101和103上；弧角140和弹性件130依次通过它们中间部位的矩形定位孔被设置在定位装置110的两条臂111上，并且与动触头120相配合地被支撑在触头支持部件100的表面101和103上(其中，弧角140压在动触头120上，弹性件130压在弧角140上)；定位装置110的横跨两条臂111的轴112压在弹性件130上，以限定动触头120、弧角140、以及弹性件130的位置，使得它们不会从定位装置110的两条臂111的上端滑脱；同时，动触头160、弧角170、以及弹性件150被支撑在触头支持部件100
的表面102上，定位装置110的轴112压在弹性件150上以限定动触头160、弧角170、以及弹性件150的位置(由于动触头160、弧角170、以及弹性件150并没有设置在定位装置110的两条臂111上，所以它们的中间部位没有矩形定位孔)。
如图5所示，动触头120为桥形动触头，其前后位置对称设置有触点122和触点123(即，前后两个对称的桥墩位置分别设置有触点122和触点123)，中间部分是动触头120的定位结构121(为一矩形孔)，定位装置110的一条臂111穿过动触头120的中间部位的矩形孔为动触头120定位和导向。应该明白的是，动触头160具有与动触头120相似的结构(除了其中间位置没有设置定位结构以外)。
如图6所示，根据本发明第一实施例的触头系统包括动触头子系统和单个静触头180。具体地，动触头子系统包括触头支持部件100、定位装置110、分别穿过定位装置110的两条臂111的两个动触头120及其上的弧角140和弹性件130、以及位于定位装置110的两条臂111之间且与动触头120(及其上的弧角140和弹性件130)并行排列的动触头160及其上的弧角170和弹性件150。
结合图2、图4、图6、以及图7可以看出，触头支持部件100的平面101和平面103支撑动触头120及其弧角140和弹性件130，触头支持部件100的平面102支撑动触头160及其弧角170和弹性件150；动触头120、弹性件130、和弧角140的中间部位均设置有矩形定位孔，这些孔分别穿过定位装置110的两个臂111；横跨定位装置110的两条臂111的轴112压在弹性件130和弹性件150上；分别由触头支持部件100的三个平面101、102、以及103支撑的三个动触头靠定位装置110的两条臂111、以及触头支持部件100的台阶104和台阶105共同导向和定位；由于触头支持部件100的平面102比平面101和平面103的位置低1mm，所以位于触头支持部件100的平面102上的动触头160比位于触头支持部件100的平面101和平面103上的动触头120低1mm。
从图6和图7可以看出，根据本发明第一实施例的触头系统中的静触头180具有分别与动触头120的两个触点和动触头160的两个触点相对应
的触点(总共六个触点)，这六个触点位于同一平面上且高度一致；由于位于触头支持部件100的平面102上的动触头160比位于触头支持部件100的平面101和平面103上的动触头120的位置低1mm，而静触头180的所有触点高度一致，所以位于触头支持部件100的平面102上的动触头160比位于触头支持部件100的平面101和平面103上的动触头120的开距小1mm，为弧触头。动触头160的触点和静触头上与动触头160的触点相对应的触点相比动触头120的触点和/或静触头上与动触头120的触点相对应的触点，采用电阻率高、耐电弧能力强的材料。例如，动触头160的触点采用银-钨合金，静触头上与之对应的触点采用银-碳化钨合金，而其它的所有触头均采用银-氧化锡合金(或银-氧化镉合金)。当然，本领域技术人员可以想到的是，动触头120和160也可以采用相同材质的触点，并且静触头上与动触头120和160的触点相对应的触点也可以采用相同的材料。
具体地，图6和图7中所示的触头系统中的触头闭合过程如下：当触头支持部件100带动动触头160和两个动触头120向下运动时，开距较小的动触头160(即，弧触头)先于两个动触头120与静触头180闭合；当两个动触头120尚未与静触头180闭合而动触头160(即，弧触头)已经与静触头180闭合时，所有的电流都集中在动触头160(即，弧触头)上；当触头支持部件100在动触头160与静触头180闭合后继续向下运动一定距离时，动触头160和两个动触头120均与静触头180闭合，电流分摊到各个动触头上，电路开始正常、平衡地接通电流；此时，动触头160和两个动触头120同时接通，动触头120和动触头160与静触头180间的接触电阻降低，从而可以降低触头系统的温升。应该明确的是，由于动触头160的触点和静触头180上与之对应的触点电阻率高于动触头120的触点和与之对应的静触头180上的触点，所以，此时分担在各动触头上的电流并不相等，动触头160上的电流明显小于其它两个动触头120，接触器主要靠两个动触头120导电。
另外，图6和图7中所示的触头系统中的触头断开过程如下：当触头支持部件100带动两个动触头120和动触头160向上运动时，开距较小的
动触头160(即，弧触头)后于两个动触头120与静触头180断开；当动触头120与静触头180断开而动触头160(即，弧触头)未与静触头180断开时，所有的电流都集中在动触头160(即，弧触头)上；两个动触头120与静触头180断开时没有分断电流，故没有电弧；当触头支持部件100继续运动使得动触头160(即，弧触头)也要与静触头180断开时，所有电流累加在动触头160(即，弧触头)上分断，便产生电弧；电弧通过灭弧系统被灭弧后，电路被完全断开。此时，在动触头160与静触头180断开时产生的电弧烧损动触头160(即，弧触头)的同时保护了其它两个动触头120基本不受烧损，因此可以提高触头系统的电气寿命。另外，动触头160的触点和静触头180上与之对应的触点采用了电阻率较高、且耐电弧能力较强的材料(例如，分别为银-钨合金和银-碳化钨合金)，所以它们的耐电弧能力强，从而可以提高动触头160(即，弧触头)的电寿命。
图8是采用根据本发明第一实施例的触头系统的接触器的示意图。如图8所示，采用根据本发明第一实施例的触头系统的接触器体积小、且容量大。
具体地，当接触器的控制线圈通电时，依据麦克斯韦电磁原理，在控制线圈产生的激磁作用下，在动铁心与静铁心之间产生电磁吸力，动铁心克服反力弹簧的反力向下运动，带动触头支持部件100向下运动；触头支持部件100带动动触头120和160向下运动，使得动触头160(即，弧触头)首先与静触头180接触；触头支持部件100继续向下运动1mm后，动触头160和两个动触头120与静触头180间的接触电阻降低；触头支持部件100继续向下运动一定距离，直到动铁心、静铁心完全闭合为止，完成触头闭合过程。以上过程实现了接触器接通电路，使电气设备(例如，电动机等)实现通电运转的功能。
具体地，当接触器的控制线圈失电时，依据麦克斯韦电磁原理，控制线圈的激磁消失，动铁心与静铁心之间的电磁吸力消失，动铁心在反力弹簧作用下，推动触头支持部件100向上运动，使得两个动触头120与静触头180首先断开；此时，开距较小的动触头160(即，弧触头)与静触头
180仍处于闭合状态；触头支持部件100继续向上运动1mm后，开距较小的动触头160(即，弧触头)才与静触头180断开，此时产生电弧；通过开距较小的动触头160(弧触头)与静触头180将电弧引入灭弧系统内灭弧；触头支持部件100继续向上运动一定距离(触头开距)，直到动铁心、静铁心完全打开为止。完成触头断开过程后，触头系统处于图6所示的断开位置。在以上过程中两个动触头120首先与静触头180断开，但开距较小的动触头160与静触头180仍处于闭合状态，所有电流通过动触头160，因此两个动触头120与静触头180断开时无电弧；触头支持部件100继续向上运动，动触头160与静触头180断开时产生电弧，动触头160为弧触头，两个动触头120不被烧损，从而提高了触头系统的电气寿命。以上过程实现了接触器分断电路，使电气设备(例如，电动机等)实现断电停止的功能。
应该明白，定位装置110可以具有两条臂，为“U”型、“H”型的结构；也可以具有三条以上的臂，为“E”型、倒“E”型的结构等等。另外，动触头120、弧角140、以及弹性件130的中间部位的矩形定位孔可以被圆形、椭圆形、L型、T型、Y型、三角形、多边形、异形定位结构等替换，只要能够将动触头120、弧角140、以及弹性件130可移动地安装在定位装置110的一条臂上即可。
图9是根据本发明第二实施例的触头系统的组装示意图。如图9所示，该触头系统包括5个动触头(分别是最外侧的两个动触头120、最中间的动触头200、以及次外侧的两个动触头160)、以及单个静触头180。其中，最中间的动触头200和次外侧的两个动触头160上依次设置有中间部位没有定位结构的弧角和弹性件，最外侧的两个动触头120及其上方依次设置的弧角和弹性件通过它们中间部位的定位结构被设置在定位装置110的两条臂111上。其中，五个动触头120、200、160的触点位置高度一致，但是最中间的动触头200的触点位置比动触头120和动触头160的触点位置距离它们的中间部位更远，静触头180分别在五个动触头触点对应位置设置有触点，最中间的动触头200对应的静触点高于其它四个静触点1.5mm。此时，最中间的动触头200比最外侧的两个动触头120和次外
侧的两个动触头160开距小1.5mm，最中间的动触头200为弧触头。这里的动触头120和160即为以上结合图4-7描述的动触头120和160，并且动触头200具有与动触头160相似的结构(除了动触头200比动触头160更长以外)。
图9所示的触头系统的工作原理与以上针对根据本发明第一实施例的触头系统描述的类似，所以在此不再累述。
根据本发明实施例的触头系统和接触器与现有触头系统和接触器相比，由于触头系统中至少有两个动触头由定位装置的至少两条臂进行定位和导向，所以节约了空间，从而使得同电流等级产品的体积远远小于市场现有产品。
另外，根据本发明实施例的包括多个动触头的触头系统相比具有单个动触头的触头系统大大降低了接触电阻，从而可以降低触头系统的温升。再者，通过设置触头系统包括的多个动触头不同时与静触头闭合和/或断开，减小了触头系统闭合或断开时电弧对动触头的烧损，从而提高了触头系统的电气寿命。
上述的实施例并不对本发明所要求的保护范围构成任何形式的限制，本发明的权利要求书覆盖了所有的修改和变更，因此，针对上述实施例做出种种修改和变化均属于本发明的保护范围内。
Claims (11)
- 一种触头系统，包括：触头支持部件，其上端设置有能够在所述触头支持部件中上下运动的定位装置，所述定位装置具有至少两条臂；至少两个第一动触头，该至少两个第一动触头分别具有至少两个触点并且分别被安装在所述定位装置的所述至少两条臂上；以及静触头，该静触头具有与所述至少两个第一动触头的触点相对应的触点，其中，所述定位装置的每条臂上安装一个第一动触头。
- 根据权利要求1所述的触头系统，其特征在于，还包括：至少一个第二动触头，该至少一个第二动触头分别具有至少两个触点并且与所述至少两个第一动触头并行地安装在所述定位装置的所述至少两条臂之间，其中，所述静触头还具有与所述至少一个第二动触头的触点相对应的触点。
- 根据权利要求1或2所述的触头系统，其特征在于，包括所述至少两个第一动触头和所述至少一个第二动触头在内的所有动触头中的至少一个动触头不与其它动触头同时和所述静触头闭合或断开。
- 根据权利要求3所述的触头系统，其特征在于，所述至少一个动触头的触点和所述静触头上与之相对应的触点相比所述其它动触头的触点和/或所述静触头上与所述其他动触头相对应的触点采用电阻率高、耐电弧能力强的材料。
- 根据权利要求1-3中任一项所述的触头系统，其特征在于，在每个第一动触头上方设置有第一弹性件。
- 根据权利要求1-3中任一项所述的触头系统，其特征在于，在每个第二动触头上方设置有第二弹性件。
- 根据权利要求5所述的触头系统，其特征在于，在每个第一动触头与其上方的第一弹性件之间设置有第一弧角。
- 根据权利要求6中任一项所述的触头系统，其特征在于，在每个第二动触头与其上方的第二弹性件之间设置有第二弧角。
- 根据权利要求1所述的触头系统，其特征在于，所述定位装置为“U”型、“H”型、“E”型、倒“E”型的结构。
- 根据权利要求7所述的触头系统，其特征在于，所述第一动触头、所述第一弹性件、以及所述第一弧角的中间部位设置有矩形、圆形、椭圆形、L型、T型、Y型、三角形、多边形、或者异形的定位结构。
- 一种接触器，包括电磁系统、灭弧系统、以及根据权利要求1-10中任一项所述的触头系统。
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| ZA2018/01873A ZA201801873B (en) | 2015-10-10 | 2018-03-20 | Contact system and contactor comprising contact system |
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| CN201510654454.5 | 2015-10-10 |
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| AU (1) | AU2016336689B2 (zh) |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4184542A4 (en) * | 2020-07-31 | 2023-09-13 | Huawei Digital Power Technologies Co., Ltd. | CONTACT DEVICE, ELECTROMAGNETIC SWITCH, ON-BOARD CHARGER AND NEW ENERGY VEHICLE |
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| CN105206476A (zh) * | 2015-10-10 | 2015-12-30 | 首瑞（北京）投资管理集团有限公司 | 触头系统、和包括触头系统的接触器 |
| CN108922825A (zh) * | 2018-06-15 | 2018-11-30 | 湖北德普电气股份有限公司 | 一种多点旋转式接触器控制系统 |
| CN109243918A (zh) * | 2018-08-21 | 2019-01-18 | 宁波市鄞州永林电子电器有限公司 | 一种大功率继电器 |
| WO2022188985A1 (de) * | 2021-03-11 | 2022-09-15 | Pierburg Gmbh | Kontaktbrückenvorrichtung für einen schalter eines hochvoltschützes oder hochvoltrelais |
| WO2022188984A1 (de) * | 2021-03-11 | 2022-09-15 | Pierburg Gmbh | Kontaktbrückenvorrichtung für einen schalter eines hochvoltschützes oder hochvoltrelais |
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- 2016-10-10 BR BR112018006036A patent/BR112018006036A2/pt not_active Application Discontinuation
- 2016-10-10 WO PCT/CN2016/101655 patent/WO2017059821A1/zh active Application Filing
- 2016-10-10 AU AU2016336689A patent/AU2016336689B2/en not_active Ceased
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| EP4184542A4 (en) * | 2020-07-31 | 2023-09-13 | Huawei Digital Power Technologies Co., Ltd. | CONTACT DEVICE, ELECTROMAGNETIC SWITCH, ON-BOARD CHARGER AND NEW ENERGY VEHICLE |
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| CN105206476A (zh) | 2015-12-30 |
| ZA201801873B (en) | 2019-01-30 |
| BR112018006036A2 (pt) | 2018-10-09 |
| AU2016336689B2 (en) | 2018-12-06 |
| AU2016336689A1 (en) | 2018-04-19 |
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