A Rotary Double Breakpoint Contact Structure of Molded Case Circuit Breaker
A technology of double breakpoint contacts and molded case circuit breakers, which is applied in the directions of circuit breaker contacts, circuit breaker components, contact engagement, etc., and can solve the problems of high cost, assembly process, complex production process, double breakpoint molded case Market application progress is slow and other issues, to achieve the effect of strong operability, reliable performance, and simple structure
Active Publication Date: 2020-08-14
FORETECH ELEC APP JIANGSU CORP
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Problems solved by technology
At present, the assembly process and production process of double-breakpoint molded case products in the market are generally complicated, and it is difficult to take advantage of the cost. Due to the high cost, the market application of double-breakpoint molded cases with excellent performance is progressing slowly.
Method used
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[0024] Example: Reference Figure 1 to 6 As shown, a plastic case circuit breaker rotary double-breakpoint contact structure includes two pagoda springs 1, a central positioning shaft 2, and a main support cover 3, a movable contact arm 4, and a movable contact arm 4 that are sequentially sleeved on the central positioning shaft 2 Auxiliary support cover plate 5, and two pagoda springs 1 are placed between the main support cover plate 3 and the auxiliary support cover plate 5 and are respectively located on both sides of the movable contact arm 4; on the inner side of the main support cover plate 3 are provided with two center symmetry There are positioning holes 31, two symmetrical limiting chute 32, two symmetrical limiting posts 33; both ends of the pagoda spring 1 are provided with a first spring arm 11 and a second spring arm 12, the first The spring arm 11 is inserted into the positioning hole 31 on the corresponding side. The second spring arm 11 is sleeved with a rollin...
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The invention discloses a moulded case circuit breaker rotation type double-breakpoint contact structure which comprises two pagoda springs, a central positioning shaft, a main support cover plate, amovable contact arm and an auxiliary support cover plate. Two center-symmetry arranged positioning holes, two central-symmetry arranged first limit chutes and two central-symmetry arranged limit pillars are arranged on the inner side of the main support cover plate; two ends of each pagoda spring are respectively provided with a first spring arm and a second spring arm, the first spring arm is inserted in the positioning hole of the corresponding side, the outer side of each second spring arm is sleeved with a rolling shaft which is arranged at the starting position of the first limit chute onthe corresponding side, the movable contact arm is positioned through the limit pillars on two sides, the pagoda springs rotate anticlockwise around the corresponding positioning holes when the movable contact arm rotates clockwise due to repulsion of a short-circuit current, and the rolling shafts rotate with the movable contact arm and move along the first limit chutes to final positions to belocked. The moulded case circuit breaker rotation type double-breakpoint contact structure has the advantages of simpleness in structure, reliable performance, convenience in assembly and capabilitiesof reducing cost of labor and raw materials.
Description
Technical field [0001] The invention belongs to the field of low-voltage electrical switches, and particularly relates to a rotary type double-breakpoint contact structure of a molded case circuit breaker. Background technique [0002] The research on the double-breakpoint arc extinguishing technology of molded case circuit breakers has become more mature. The product development of double-breakpoint molded case circuit breakers in China is also booming. With the vigorous advancement of new energy industries such as photovoltaic power generation and wind power generation, low-voltage electrical products The protection performance and reliability of the new energy generation system put forward higher requirements. At the same time, due to the market cost pressure of new energy power generation operation, the cost of switching components is also paid special attention. [0003] When a large current is passed, a huge electric repulsion force will be generated between the moving and st...
Claims
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IPC IPC(8): H01H73/04H01H1/22
Inventor 种彪虞国荣曹兵兵马轩王宇翔燕晗
Owner FORETECH ELEC APP JIANGSU CORP