JPS61216216A - Electromagnetic contactor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to preventing vibration of a movable iron core when turning on an electromagnetic contactor, particularly an electromagnetic contactor with an additional auxiliary contact unit.

[Conventional technology]

Figure 5 is a partially cutaway side view of a conventional electromagnetic contactor. (3) is a fixed core made of laminated silicon steel plates, (4) is an operating coil wound around the center leg of the fixed core (3), and (5) is a tripping coil. A movable core is disposed facing a fixed core (3) with a predetermined gap by a spring (not shown), and (6) is an insulating crossbar connected to a movable core (5) via a pin (7). 1 (8) is the crossbar (6
) The holding hole (62) provided in the head (6) of the movable contact (9) holds the movable contact (8) to the spring receiver (to).
The contact spring is pressurized through the movable contact (
8) is a fixed contact mounted on the base (2) opposite to the movable contact (8) and the fixed contact α theory. It is smaller than the gap.

In the electromagnetic contactor configured as described above, by applying a driving voltage to the operating coil (4) and energizing it, the movable core (5) is attracted to the fixed core (3), and at the same time the movable core (
The crossbar (6) connected to 5) is also connected to the fixed core (3) side +
: Moving. Due to this movement of the crossbar (6), the movable contact (8) comes into contact with the fixed contact Q1, and the contact spring (
9) to apply a predetermined contact pressure.

When the drive voltage applied to the operating coil (4) is removed.

The movable core (5) becomes the fixed core (3) by the force of the tripping spring.
The movable contact (8) also moves away from the fixed contact (1) in the opposite direction (=moves).

When using the electromagnetic contactor configured as described above, the normal mounting condition is as shown in explanatory diagram C2 of FIG.

In the conventional electromagnetic contactor, in the open state shown in Fig. 6,
The base (2) is in contact with the side surface (63) of the crossbar (6).
) upper contact surface Qυ and F measurement contact surface (the two metals are on the same vertical plane, so the crossbar (6) is horizontal, and the head (61) of the crossbar (6) and movable The iron core part (64) is the lower receiving surface (c) of the base (2),
G! 4) is the sliding surface. Note that (6) is a tripping spring, and I is 4iIm rubber.

From this state, when the movable core 5 begins to be attracted to the fixed core (3) as shown in FIG. 7 by excitation of the operating coil (4), the gravity acting on the movable core (5) and the movable core of the crossbar (6) The movable core (5) rotates clockwise due to friction between the part (64) and the movable core part side receiver (J4) of the base (2). Therefore, the movable core (5) is replaced by the fixed core (3).
When the iron cores are tilted, they collide and hit each other unevenly, causing uneven wear on both cores and shortening the life of the iron cores.

In addition, when the crossbar (6) is opened, the impact of the side surface (63) of the crossbar (6) hitting the upper F contact surface of the base (2) causes the auxiliary contact B to
A rebound occurs at contact aS.

In order to solve this problem with conventional electromagnetic contactors, the movable core side of the crossbar slides on the receiving surface of the base on the gravity direction side during suction, and the head side of the crossbar slides on the receiving surface of the base on the side opposite to the gravity direction. By sliding on the surface, the crossbar and movable iron core move horizontally (=move), and by providing a step on the upper and lower contact surfaces of the base that the side surfaces of the glossper come into contact with when opening, the crossbar moves in the counterclockwise direction when opening. The applicant of the present application has proposed that the shock at the time of opening be reduced by rotating and standing still (Japanese Patent Application No. Sho-2).

FIGS. 8 and 9 are explanatory diagrams of the operation of the electromagnetic contactor according to the second proposal, and the same reference numerals as in the above conventional example indicate the same parts.

(C) shows the head (6) of the crossbar (6) in the suction state.
The receiving surface of the base on which 1) slides, the prisoner is the crossbar (6)
The side surface (63) of the base shows the level difference between the upper contact surface Qυ and the lower contact surface @ that contact when the base is opened, and the lower contact surface (24
protrudes from the upper contact surface Qυ by a distance of (5).

In the open state of the electromagnetic contactor, as shown in FIG.

The side surface (63) of the cross bar (6) is in contact with the upper contact surface Qυ and the lower contact surface (2) of the base, and the cross bar (6) and movable iron core (5) are tilted from the horizontal). be.

When a voltage is applied to the operating coil (4) and the movable core (5) is attracted to the fixed core (3), the black (-
(6) starts moving from the state similar to the above, and Kuromeno (=
Due to the friction between the movable iron core (64) of (6) and the receiving surface of the base, the gravity acting on the movable iron core (5), etc., the crossbar (6) rotates clockwise during suction. The movable iron core (64) of the Grosper (6) slides on the receiving surface of the base in the direction of gravity, and the cross bar (6)
head (6 is the receiving surface of the base opposite to the direction of gravity (c)
Slide it.

The crossbar (6) and movable iron core (5) are moved horizontally.

Therefore, the movable core (5) hits the fixed core (3) in parallel to prevent uneven contact.

Also, when opened (: is as shown in Figure 8) (Nicrosper (6)
) first hits the lower contact surface (2) of the base, and then the crossbar (6) rotates counterclockwise C twice,
Be.

- The upper contact surface (201) of the crossbar (201) comes to rest against the knee.The rotation of this crossbar (6) makes it possible to generate an impact when opening, thereby preventing the b contact from bouncing back.

[Problem that the invention seeks to solve]

As shown in the schematic diagram of FIG. 10, the head (61) of the crossbar (6)
When connecting an additional auxiliary contact unit having an auxiliary cross bar (70), an auxiliary movable contact (7), and an auxiliary fixed contact (72) at the connecting part Q stage provided in the Q stage, the head (61) of the cross bar (6) is heavy, so the crossbar (6
) Until the contacts begin to make contact, move in a tilted state rather than completely horizontal.

When the contacts make contact, a contact pressure is generated between the contacts, so a force is applied to the auxiliary crossbar (70) in the opposite direction to the fixed iron core (3), and the connecting portion 05 between the auxiliary crossbar (70) and the crossbar (6) is fixed in that state, and the crossbar (6) moves in an inclined state with the movable core side facing upward.

Therefore, as shown in FIG.
There is a problem that a gap is created between the upper armature surfaces, and the problem is that it either remains as it is or it vibrates for a long time, causing chatter noise.

Further, since the movable iron core (5) and the fixed iron core (3) make uneven contact, there is also a problem that uneven wear of the iron core occurs.

The present invention was made to solve these problems, and an object of the present invention is to provide an electromagnetic contactor that has a simple structure and can prevent vibrations during suction and uneven wear of the iron core.

[Means for solving problems]

The electromagnetic contactor according to the present invention is provided with a step on the surface of the mounting base that holds the fixed core, with the upper surface being higher than the lower surface with respect to the direction of gravity in the normally installed state.

The fixed iron core is held on this upper high surface via cushioning rubber.

[For production]

In this invention, when the do side armature surface of the movable iron core hits the F side contact surface of the fixed iron core, the fixed iron core rotates around the fulcrum formed by the step of the mounting base, so that the movable iron core and the fixed iron core are immediately connected to each other. f Both liquid electrode surfaces are in close contact.

〔Example〕

FIG. 1 is a partial sectional view showing one embodiment of the present invention, and in the figure, (1), (3), (4) and I indicate the same parts as the above-mentioned conventional example. (1) is a protrusion provided on the surface of the mounting base (1) that holds the fixed iron core (3), and the protrusion A is the most visible when the electromagnetic contactor is normally installed, that is, the mounting plate (not shown) is installed vertically. ) with the magnetic contactor installed.

It is provided on the upper surface with respect to the power direction. This protrusion 0
! 9 holds the fixed iron core (3) via an in-rubber (141).

The operation of the electromagnetic contactor configured as above is shown in Figures 2 to 4.
The operation will be explained based on the operation explanatory diagram in the figure. Operation coil (4)!
= When voltage is applied, the movable iron core (
5) is attracted to the fixed iron core (3) in a tilted state, and the movable iron core (5) and the F section armature surfaces of the fixed iron core (3) collide. Due to this collision of the F part armature surface, the fixed core (3) is damaged by the protrusion (1!19 corner fulcrum α) of the mounting base (1) as shown in Fig. 6.
The lower side of the fixed core (3) escapes, buffering the impact on the F part armature surface, and rotating the movable core (
5) and the upper F liquid electrode surfaces of the fixed core (3) are in close contact.

With the two liquid electrode surfaces in close contact, the moving iron core (5) and the fixed iron core (3) become horizontal as shown in FIG. 4 due to the reaction force caused by the rotation of the fixed iron core (3).

The F part polarization direction of this movable core (5) is F of the fixed core (3).
The time from when the upper F liquid electrode surfaces come into close contact after colliding with the partial electrode surface is extremely short, making it possible to prevent the vibration of the movable iron core (3) and also prevent the occurrence of chatter noise. I can do it.

〔Effect of the invention〕

As explained above (-1), the movable iron core rotates when the F-side peri-pole surface of the movable iron core hits the F-side peri-pole surface of the fixed iron core in the normal installation state (-1). Warm up the striking force when is attracted to the fixed iron core.1
Uneven wear of the iron core due to uneven contact can be prevented.

In addition, by rotating the fixed iron core, the upper F liquid electrode surfaces of the movable iron core and the fixed iron core can be brought into close contact with each other, which prevents vibration of the movable iron core and reduces chattering noise when the iron is inserted. Prevention also has a significant effect.

[Brief explanation of drawings]

FIG. 1 is a partial sectional view showing an embodiment of the invention. Figures 2', 6, and 4 are explanatory diagrams of the operation of the above embodiment, respectively; Figure 5 is a partially cutaway side view of a conventional electromagnetic contactor; Figures 6 and 7; 8 and 9 are explanatory diagrams of the operation of a conventional electromagnetic contactor, respectively. FIG. 10 is a schematic configuration diagram of the electromagnetic contactor, and FIG. 10 is an explanatory diagram of the operation of the electromagnetic contactor shown in FIG. 10. FIG. (1)...Mounting base, (3)...Fixed core, (4)...
...Operation coil. (5)...Movable iron core, Q4)...41m rubber, (1
G...Protruding part of the mounting base. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] During suction in the normally installed state, the movable iron core side of the crossbar slides on the receiving surface on the gravity direction side of the base, and the head side of the crossbar slides on the receiving surface on the opposite side of the base to the gravity direction, and the crossbar and movable In an electromagnetic contactor, the iron core is moved horizontally and a step is provided on the upper and lower contact surfaces of the base that the side of the crossbar comes into contact with when opened, and the crossbar rotates counterclockwise and remains stationary when opened. A step is provided on the surface of the mount that holds the fixed core, with the upper surface being higher than the lower surface in the direction of gravity in the above normal installation state, and the fixed core is held on the upper surface via a cushioning rubber. An electromagnetic contactor characterized by: