JPS6237325Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a reversible electromagnetic contactor used for forward and reverse operation of electric motors in hoists, cranes, etc.

Conventional technology Conventionally, methods for fixing the support shaft of the interlock plate of a reversible magnetic contactor include (1) inserting the interlock plate into the insulating case, and inserting the support shaft into the hole in the insulating case and the hole in the interlock plate; (2) Insert the support shaft that has been inserted through the interlock plate into the groove of the insulation case, and then fix the fixing piece on the support shaft. There are methods such as making them abut and fixing the fixing piece with a cover via a spring, but with method (1), the hole in the insulating case into which the support shaft is inserted must be drilled after molding. The drawback is that it is difficult to insert the support shaft into the hole in the insulating case and interlock plate, and method (2) requires the use of additional parts such as fixing pieces and springs to secure the support shaft. However, there was a drawback that the cost was high.

Purpose This invention aims to improve the above drawbacks.
To obtain a reversible electromagnetic contactor which has a structure in which the shaft of an interlock plate is abutted and supported by an insulating case cover, has a simple structure, reduces the number of parts, and is easy to assemble.

Embodiment As explained below with reference to the drawings, 1 is an insulating case;
2 is an insulating cover, 3 is a pair of forward and reverse movable bodies, and a movable contact insertion part 1 is formed for each phase on the top thereof.
8 protrudes from a plurality of holes 20 provided in the top plate 19 on the upper part of the insulating cover 2, 4, 4 is fixed on the top plate 19 by a pair of fixed contacts arranged for each phase, and the center pole serves as a common contact. Reference numerals 5 and 5 denote a pair of movable contacts which are opposed to the fixed contacts 4 and 4 and are firmly connected to the movable contact insertion portion 18. The fixed contact 4 at the center pole has contact parts at both ends, and the movable contact 5 bridges into contact with the fixed contact 4 arranged opposite to the contact parts at both ends.The movable contacts 6 and 6 are a pair of movable iron cores and are movable bodies. 3,
3 is fixed to the bottom of the insulating case 1 with pins 7, 7, 8, 8 is a pair of fixed iron cores and is fixed to the bottom of the insulating case 1 facing the movable iron cores 6, 6, 9, 9 are a pair of coils, 1
0 and 10 are a pair of return springs for the movable bodies 3 and 3; 11
is an interlock plate whose both ends are fitted into a pair of bag-shaped parts 12, 12 provided opposite to each other on the movable bodies 3, 3, and the center part of the interlock plate 11 is inserted into an insertion groove 21 provided on the back surface of the insulating cover 2. is inserted into.

Reference numeral 13 denotes a support shaft which is inserted into a hole in the interlock plate 11 to rotatably pivot the interlock plate 11, and an insertion groove 2 formed on the back surface of the central part of the insulating case 2.
1 into the groove 14 provided perpendicularly to the support shaft 13.
is supported by the insulating case 1 and the insulating cover 2 being coupled and fixed by abutting protrusions 15, 15 formed on the insulating case 1. A socket 16 has an external terminal 17 to which the fixed contact 4 is connected.

Next, the support shaft 1 inserted through the interlock plate 11
To explain the assembly method of No. 3, both ends of the interlock plate 11 are inserted into the bag-like parts 12, 12 of the movable bodies 3, 3, and with the support shaft 13 inserted into the hole of the interlock plate 11, the insulating cover 2 is inserted. The interlock plate 11 is inserted into the insertion groove 21 of the insulating case 1, and the support shaft 13 is fitted into the groove 14 to fix the insulating case 1 and the insulating cover 2. Assembly is completed. 15 is abutted and supported within the groove 14.

Effects of the invention As described above, in this application, the protrusion 15 of the insulating case 1 is used to fix the support shaft 13 of the interlock plate 11, so the reversible electromagnetic contactor has a simple structure, a small number of parts, and is easy to assemble. This has the practical effect of providing a support shaft fixing structure for the interlock plate.

[Brief explanation of drawings]

The figures show one embodiment of the reversible electromagnetic contactor according to the present invention, in which Fig. 1 is a front view with the socket removed, Fig. 2 is a vertical sectional bottom view of the main parts, and Fig. 3 is the same as Fig. 2. 4 is a longitudinal sectional view of the main part taken along the line B-B in FIG. 2, and FIG. 5 is a longitudinal sectional view taken along the line C-C of FIG. 4. 1 is an insulating case, 2 is an insulating cover, 3 is a movable body, 13 is a support shaft, 14 is a groove, 15 is a protrusion, 21
is the insertion groove.

Claims (1)

[Scope of utility model registration request] An insulating cover 2 that closes an insulating case 1 with a pair of fixed iron cores 8, 8 fixed to the bottom, and a pair of fixed contacts arranged and fixed for each phase on the top plate 19 of the insulating cover 2, with the center as a common pole. 4, 4, and a movable contact insertion part 18 for inserting a pair of movable contacts 5, 5 facing the fixed contacts 4, 4 for each phase, the movable contact insertion part 18 A plurality of holes 20 in the top plate 19
A pair of movable bodies 3, 3 that are made to protrude further; a pair of movable cores 6, 6 fixed to the lower part of the movable bodies 3, 3 facing the fixed cores 8; In an electromagnetic contactor consisting of an interlock plate 11 with both ends inserted into a pair of bag-shaped parts 12, 12 facing each other, a central part of the back surface of the insulating cover 2 between the movable bodies 3, 3, A groove 14 provided perpendicularly to the insertion groove 21 of the interlock plate 11 formed on the back surface, a support shaft 13 that fits into the groove 14 and pivots the interlock plate 11, and the support shaft 1.
1. A reversible electromagnetic contactor comprising a protrusion 15 of an insulating case 1 which abuts and supports an insulating case 1.