阅读说明：本技术 一种直流接触器触头组件 (Direct current contactor contact assembly ) 是由 陈宁 张喜兵 谢强强 于贻鹏 罗雨 史亚闻 于 2019-09-26 设计创作，主要内容包括：一种直流接触器触头组件,它包括活动触头(1)和固定触头(2),所述活动触头(1)和所述固定触头(2)的接合与脱开能够控制所述直流接触器的通断,其特征在于：所述活动触头(1)同轴连接有活动弧触头(3),所述固定触头(2)固定连接有固定弧触头(4),所述活动触头(1)和所述固定触头(2)的接合与脱开过程中,所述活动弧触头(3)和所述固定弧触头(4)能够相应的先于或后于所述活动触头(1)和所述固定触头(2)的接合与脱开。在传统的直流接触器基础上设置有弧触头,弧触头使用耐电弧烧蚀的铜钨等合金材料,在接通分断过程中,可以实现弧触头先接通后分断,承担电弧的烧蚀影响,保护主触头完好,延长产品的使用寿命。(A direct current contactor contact assembly, it includes movable contact (1) and fixed contact (2), the engagement and the disengagement of movable contact (1) and fixed contact (2) can control the break-make of direct current contactor, characterized by that: the movable contact (1) is coaxially connected with a movable arc contact (3), the fixed contact (2) is fixedly connected with a fixed arc contact (4), and in the process of engaging and disengaging the movable contact (1) and the fixed contact (2), the movable arc contact (3) and the fixed arc contact (4) can be correspondingly engaged and disengaged before or after the movable contact (1) and the fixed contact (2). The arc contact is arranged on the basis of a traditional direct current contactor, the arc contact is made of alloy materials such as copper, tungsten and the like which are resistant to arc erosion, the arc contact can be switched on and then switched off in the switching-on and switching-off process, the ablation influence of an arc is born, the main contact is protected to be intact, and the service life of a product is prolonged.)

1. A direct current contactor contact assembly, it includes movable contact (1) and fixed contact (2), the engagement and the disengagement of movable contact (1) and fixed contact (2) can control the break-make of direct current contactor, characterized by that: the movable contact (1) is coaxially connected with a movable arc contact (3), the fixed contact (2) is fixedly connected with a fixed arc contact (4), and in the process of engaging and disengaging the movable contact (1) and the fixed contact (2), the movable arc contact (3) and the fixed arc contact (4) can be correspondingly engaged and disengaged before or after the movable contact (1) and the fixed contact (2).

2. A dc contactor contact assembly as claimed in claim 1, wherein: activity contact (1) with the axial motion that can follow loose axle (5) on loose axle (5) is gone up in activity arc contact (3) coaxial arrangement, and activity main contact spring (6) suit is in on loose axle (5), one end supports spacing step (501) on loose axle (5), the other end supports the lower surface of activity contact (1), activity arc contact spring (7) suit are in on loose axle (5), one end supports spacing step (501) on loose axle (5), the other end supports the lower surface of activity arc contact (3), the upper surface of activity arc contact (3) is not less than the upper surface of activity contact (1).

3. A dc contactor contact assembly as claimed in claim 2, wherein: the fixed arc contact (4) is welded on the contact surface of the fixed contact (2), and the fixed arc contact (4) is not lower than the contact surface of the fixed contact (2).

4. A dc contactor contact assembly as claimed in claim 2, wherein: the movable contact (1) is arranged in a movable contact mounting groove (301) on the movable arc contact (3), and the movable main contact spring (6) penetrates through a through hole (301a) at the bottom of the movable contact mounting groove (301) to abut against the lower surface of the movable contact (1).

5. A dc contactor contact assembly as claimed in claim 2, wherein: the fixed arc contact (4) and the movable arc contact (3) are made of arc ablation resistant materials.

6. A dc contactor contact assembly as claimed in claim 2, wherein: an insulating gasket (8) is arranged between the movable contact (1) and the movable shaft (5), and the insulating gasket (8) is sleeved on the upper surface of the movable contact (1) on the movable shaft (5).

7. A dc contactor contact assembly as claimed in claim 6, wherein: and a check ring (9) is arranged at one end of the movable shaft (5) penetrating through the insulating washer (8).

8. A dc contactor contact assembly as claimed in claim 2, wherein: the movable main contact spring (6) and the movable arc contact spring (7) are sleeved on the upper end and the lower end of the movable shaft (5) and abut against the limiting sleeve (10) on the limiting step (501).

9. A dc contactor contact assembly as claimed in claim 2, wherein: the fixed contact (2) is arranged on the ceramic cavity (11) and corresponds to the movable contact (1).

10. A dc contactor contact assembly as claimed in claim 9, wherein: kovar (12) is connected to ceramic cavity (11) bottom dull and stereotyped yoke (13) dress Kovar (12) bottom, the one end that movable shaft (5) were equipped with movable contact (1) stretches into ceramic cavity (11) and corresponds with fixed contact (2).

Technical Field

The invention belongs to the technical field of direct current contactors, and particularly relates to a contact assembly of a direct current contactor.

Background

Along with new energy automobile's rapid development, its supporting electric pile that fills that uses also will popularize by a large scale, and new energy automobile with fill inside all can use direct current contactor of electric pile. Wherein because fill electric pile and generally have two rifle heads, in order to reach the work of two guns simultaneous workings or the work of single rifle high power, fill the inside nonpolar direct current contactor that high index divides absolutely that needs to use of electric pile. Therefore, the direct current contactor capable of realizing high-index breaking and main loop nonpolarity simultaneously is particularly important for the new energy automobile industry.

At present at electric automobile, fill the direct current contactor that fields such as electric pile used, operating voltage is the highest to 750V, and operating current is 400A at the utmost, along with the increase of electric automobile duration, requires to have higher electric life to direct current contactor. The existing direct current contactor mostly adopts a direct-acting contact, the contact can generate electric arc in the process of breaking a circuit, the existing product realizes rapid arc extinction by adding permanent magnet magnetic blow and inert gases such as hydrogen or nitrogen, but the electric abrasion of the contact surface of the contact cannot be prevented, the electric abrasion is more serious when the current is larger, the final product cannot reliably switch on the circuit, and the performance failure and the service life are stopped.

Disclosure of Invention

The invention aims to provide a contact assembly of a direct current contactor, aiming at the technical defect that the arc extinguishing mode of the existing direct current contactor easily causes the electrical abrasion of the contact surface of the contact, the contact assembly is provided with an arc contact on the basis of the traditional direct current contactor, the arc contact is made of alloy materials such as copper, tungsten and the like which are resistant to arc erosion, the arc contact can be firstly connected and then disconnected in the connection and disconnection process, the ablation influence of the arc is born, the main contact is protected to be intact, and the service life of a product is prolonged.

Technical scheme

In order to achieve the technical purpose, the invention provides a direct current contactor contact assembly, which comprises a movable contact and a fixed contact, wherein the engagement and disengagement of the movable contact and the fixed contact can control the on-off of the direct current contactor, and the direct current contactor contact assembly is characterized in that: the movable contact is coaxially connected with a movable arc contact, the fixed contact is fixedly connected with a fixed arc contact, and the movable arc contact and the fixed arc contact can be correspondingly engaged with and disengaged from the movable contact and the fixed contact before or after the movable contact and the fixed contact are engaged with and disengaged from each other in the engaging and disengaging process of the movable contact and the fixed contact.

Preferably, the movable contact and the movable arc contact are coaxially arranged on the movable shaft and can move along the axial direction of the movable shaft, the movable main contact is sleeved on the movable shaft through a spring, one end of the movable main contact abuts against the limiting step on the movable shaft, the other end of the movable main contact abuts against the lower surface of the movable contact, the movable arc contact is sleeved on the movable shaft through a spring, one end of the movable main contact abuts against the limiting step on the movable shaft, the other end of the movable main contact abuts against the lower surface of the movable arc contact, and the upper surface of the movable arc contact is not lower than the upper surface of the movable contact.

Preferably, the fixed arcing contact is welded on the contact surface of the fixed contact, and the fixed arcing contact is not lower than the contact surface of the fixed contact.

Preferably, the movable contact is arranged in a movable contact mounting groove on the movable arc contact, and the movable main contact spring passes through a through hole at the bottom of the movable contact mounting groove to abut against the lower surface of the movable contact.

Preferably, the fixed arc contact and the movable arc contact are of arc erosion resistant material.

Preferably, an insulating gasket is arranged between the movable contact and the movable shaft, and the insulating gasket is sleeved on the movable shaft and positioned on the upper surface of the movable contact.

Preferably, a retainer ring is arranged on one end of the movable shaft penetrating through the insulating washer.

Preferably, the movable main contact spring and the movable arc contact spring are sleeved on the upper end and the lower end of the movable shaft to abut against the limiting sleeve on the limiting step.

Preferably, the fixed contact is mounted on the ceramic cavity at a position corresponding to the movable contact.

Preferably, the bottom of the ceramic cavity is connected with a kovar, the flat magnetic yoke is arranged at the kovar bottom, and one end of the movable shaft, which is provided with the movable contact, extends into the ceramic cavity and corresponds to the fixed contact.

Advantageous effects

The contact assembly of the direct current contactor provided by the invention is provided with the arc contact on the basis of the traditional direct current contactor, the arc contact is made of alloy materials such as copper, tungsten and the like which are resistant to arc erosion, and in the process of connection and breaking, the arc contact can be connected firstly and then broken, the ablation influence of an arc is born, the main contact is protected to be intact, and the service life of a product is prolonged.

Drawings

FIG. 1 is a schematic structural view of an embodiment of the present invention in a release position;

figure 2 is a schematic illustration of the movable arcing contact and the fixed arcing contact in a closed position in accordance with an embodiment of the present invention;

FIG. 3 is a schematic diagram of a movable contact and a fixed contact in a closed position according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of the construction of an armature and yoke in a closed position in accordance with an embodiment of the present invention;

figure 5 is a perspective view of a contact assembly mounting location in an embodiment of the present invention;

FIG. 6 is a schematic view of the connection of the movable contact and the movable arcing contact in an embodiment of the present invention;

figure 7 is a perspective view of a movable arcing contact in an embodiment of the present invention.

Detailed Description

The present invention is further described below with reference to the drawings and examples, but the following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

Example 1

As shown in fig. 1 and 5, a contact assembly of a direct current contactor includes a movable contact 1 and a fixed contact 2, the engagement and disengagement of the movable contact 1 and the fixed contact 2 can control the on-off of the direct current contactor, the movable contact 1 is coaxially connected with a movable arc contact 3, the fixed contact 2 is fixedly connected with a fixed arc contact 4, and in this embodiment, the fixed arc contact 4 and the movable arc contact 3 are made of materials resistant to arc erosion. The fixed arcing contact 4 is welded on the contact surface of the fixed contact 2, and the fixed arcing contact 4 is not lower than the contact surface of the fixed contact 2. During the engagement and disengagement of the movable contact 1 and the fixed contact 2, the movable arcing contact 3 and the fixed arcing contact 4 can be respectively engaged and disengaged before or after the movable contact 1 and the fixed contact 2. Kovar 12 is connected to ceramic cavity 11 bottom, dull and stereotyped yoke 13 dress is in Kovar 12 bottom, the one end that movable shaft 5 was equipped with movable contact 1 stretches into ceramic cavity 11 and fixed contact 2 and corresponds. The fixed contact 2 is arranged on the ceramic cavity 11 and corresponds to the movable contact 1.

The movable contact 1 and the movable arc contact 3 are coaxially arranged on the movable shaft 5 and can move along the axial direction of the movable shaft 5, in the embodiment, as shown in the attached drawings 6 and 7, the movable contact 1 is arranged in a movable contact mounting groove 301 on the movable arc contact 3, a movable main contact spring 6 is sleeved on the movable shaft 5, one end of the movable main contact spring abuts against a limiting step 501 on the movable shaft 5, and the other end of the movable main contact spring 6 penetrates through a through hole 301a at the bottom of the movable contact mounting groove 301 and abuts against the lower surface of the movable contact 1. The movable arc contact spring 7 is sleeved on the movable shaft 5, one end of the movable arc contact spring props against the limiting step 501 on the movable shaft 5, the other end of the movable arc contact spring props against the lower surface of the movable arc contact 3, and the upper surface of the movable arc contact 3 is not lower than the upper surface of the movable contact 1. In this embodiment, further, the movable main contact spring 6 and the movable arcing contact spring 7 are sleeved on the upper end and the lower end of the movable shaft 5, and preferably abut against the limiting sleeve 10 on the limiting step 501.

An insulating gasket 8 is arranged between the movable contact 1 and the movable shaft 5, and the insulating gasket 8 is sleeved on the movable shaft 5 and positioned on the upper surface of the movable contact 1. A check ring 9 is arranged on one end of the movable shaft 5 penetrating through the insulating washer 8.

The working process of the embodiment is as follows: as shown in fig. 1, when the power is turned on, the armature 14 overcomes the spring force of the counter spring 16 successively under the action of electromagnetic force to drive the movable shaft 5 to move toward the fixed contact 2, and then the movable arc contact spring 7 and the movable main contact spring 6 mounted on the movable shaft 5 drive the movable contact 1, the movable arc contact 3, the retainer ring 9 and the insulating washer 89 to move together until the movable arc contact 3 and the fixed arc contact 4 contact each other, as shown in fig. 2, at this time, the movable arc contact 3 and the fixed arc contact 4 start to make a circuit.

At this time, the movable shaft 5 continues to move towards the direction of the fixed contact, the movable arcing contact spring 7 is compressed, the movable contact 1 and the movable arcing contact 3 start to separate, then the movable contact 1, the movable main contact spring 6, the retainer ring 9 and the insulating washer 8 keep moving towards the direction of the fixed contact 2 until the movable contact 1 and the fixed contact 2 are contacted, and as shown in fig. 3, the main loop current can simultaneously pass through the movable arcing contact 3 and the fixed arcing contact 4 as well as the movable contact 1 and the fixed contact 2.

At this time, the movable shaft 5 continues to move towards the direction of the fixed contact 2, in addition to compressing the movable arcing contact spring 7, the movable main contact spring 6 is also compressed, the retainer ring 9 and the insulating washer 8 start to separate, the movable shaft 5 and the retainer ring 9 keep moving towards the direction of the fixed contact 2 until the armature 14 contacts with the magnetic yoke 15, as shown in fig. 4, at this time, certain spring pressure is applied to the movable arcing contact 3 and the fixed arcing contact 4 as well as the movable contact 1 and the fixed contact 2, and the circuit is in a stable connection state.

When the power is cut off, the moving direction of each moving part is opposite to the direction, the movable contact 1 and the fixed contact 2 are disconnected firstly, and the movable arc contact 3 and the fixed arc contact 4 are still contacted at the moment, so that no electric arc is generated when the movable contact 1 and the fixed contact 2 are disconnected, the fixed contact 2 and the movable contact 1 are protected from electric abrasion, only when the movable shaft 5 continues to move until the movable arc contact 3 and the fixed arc contact 4 are disconnected, the electric arc is generated, and because the movable arc contact 3 and the fixed arc contact 4 are made of alloy materials such as copper, tungsten and the like which are resistant to electric arc ablation, the electric abrasion amount in the disconnection process is small, and the service life of a product is prolonged. Due to process limitations and the requirement that the contact heating is not too high, arcing contact materials are not suitable for being used as a whole as a fixed contact and a movable contact.

In addition, under the long-term electrifying working condition of the contactor in the embodiment, the main loop current simultaneously passes through the movable arc contact 3, the fixed arc contact 4, the movable contact 1 and the fixed contact 2, so that the electrifying area of the current is ensured, and the contactor provided by the invention is favorably ensured to have lower temperature rise.