Low pressure contactor sliding contact structure employing contact pressure automatic adjustment
A technology of automatic adjustment and contact pressure, applied in the direction of contacts, relays, electromagnetic relays, etc., can solve the problems that affect the service life and breaking capacity of the contactor, the contact cannot be fully contacted, and the surface of the contact is oxidized to achieve a balance Double breakpoint contact pressure, low cost, and the effect of improving the conductivity of the contact
Inactive Publication Date: 2014-08-06
SHENYANG POLYTECHNIC UNIV
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Problems solved by technology
On the one hand, after repeated opening and closing, the surface of the contact with no current or current is gradually worn due to mechanical or electrical effects
On the other hand, there is contact resistance at the contact point of the contact. At the moment of normal connection and breaking current, the contact will generate local high temperature. After long-term use, the surface of the contact will oxidize.
The above reasons prevent the contacts from being fully in good contact. As the contact resistance between the contacts gradually increases, the contact degree gradually decreases, which affects the service life and breaking capacity of the contactor.
The electrical life of the AC contactors currently in use is often much shorter than the mechanical life
Method used
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[0016] Such as figure 1 As shown, the low-voltage contactor sliding contact structure with automatic contact pressure adjustment is adopted, which includes a first static contact unit 401, a second static contact unit 402, a first moving contact unit 301, and a second moving contact unit 302, elastic mechanism 1, conductive connecting rod 2 and insulating rod 5; the elastic mechanism 1 is fixed between the ends of the first moving contact unit 301 and the second moving contact unit 302; the conductive connecting rod 2 Both ends are axially connected to the first moving contact unit 301 and the second moving contact unit 302; the insulating rod 5 is vertically fixed to the conductive connecting rod 2 .
[0017] The elastic mechanism 1 of the present invention can adopt a compression spring structure.
[0018] In the present invention, the front ends of the first moving contact unit 301 and the second moving contact unit 302 can adopt an upturned structure.
[0019] I...
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The present invention relates to a contact structure, in particular to a sliding contact structure of a low-voltage contactor adopting automatic adjustment of contact pressure, which comprises a first static contact unit (401), a second static contact unit (402), The first moving contact unit (301), the second moving contact unit (302), the elastic mechanism (1), the conductive connecting rod (2) and the insulating rod (5); the elastic mechanism (1) is fixed on the first moving Between the ends of the contact unit (301) and the second moving contact unit (302); the two ends of the conductive connecting rod (2) and the first moving contact unit (301) and the second moving contact unit (302) Shaft connection; the insulating rod (5) is vertically fixed to the conductive connecting rod (2); the elastic mechanism (1) adopts a compression spring structure. The invention has a high level of breaking voltage, has the function of automatically adjusting the pressure between the moving and static contacts, realizes the effective and close contact between the contacts, and improves the service life of the contacts through the self-cleaning function of the contact surface.
Description
technical field [0001] The invention relates to a contact structure, in particular to a sliding contact structure of a low-voltage contactor which adopts automatic adjustment of contact pressure. Background technique [0002] The contactor is an automatic control electrical appliance. The contactor is mainly used for frequently connecting or breaking AC and DC circuits. It has a large control capacity and can be operated from a long distance. With the relay, it can realize timing operation, chain control, various quantitative control and voltage loss and undervoltage protection. [0003] The existing AC contactor used in production includes a pair of contacts, which are usually set so that the static contacts are fixed. back and forth motion. On the one hand, during repeated opening and closing, the surface of the contact with no current or with current is gradually worn due to mechanical or electrical effects. On the other hand, there is contact resistance at the contact...
Claims
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IPC IPC(8): H01H50/54H01H1/50
Inventor曹云东刘晓明李静孙鹏侯春光徐冲
OwnerSHENYANG POLYTECHNIC UNIV