JPS6238294Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a coupling device for electromagnets in an electromagnetic contactor.

[Prior Art] A movable core of an electromagnet is connected to a movable element made of an insulating material and provided with movable contacts of an electromagnetic contactor. As shown in FIG. 1, the horizontal hole provided in the connecting portion of the movable element 31 and the horizontal hole provided in the connecting portion of the movable iron core 32 are aligned, and the connecting round pin 33 is inserted there. It was assembled by fitting the E-rings 34 for retaining into the grooves 33a on both sides.

[Problem that the invention attempts to solve]

However, such a connecting device using the connecting round pin 33 and the retaining E-ring 34 requires at least two parts, and during assembly, the retaining E-ring is inserted after the connecting round pin 33 is inserted. 34 is required, there is a problem that the number of parts increases and the assembly work becomes complicated.

The present invention was devised in view of these conventional drawbacks, and allows the movable element and the movable iron core to be easily connected using one component, and also has a retaining effect by itself. The object of the present invention is to provide a coupling device having the following features.

[Means for solving problems]

In order to achieve this object, an electromagnet coupling device in an electromagnetic contactor of the present invention is a device for coupling a movable element provided with a movable contact of an electromagnetic contactor and a movable iron core of an electromagnet, the movable element and At the corresponding connection parts of the movable core, horizontal holes whose center lines almost coincide with each other are provided, and a connecting pin made of an elastic plate is provided that passes through both of these horizontal holes, and a convex part is provided in the longitudinal center of the connecting pin, Protrusions protruding in a direction opposite to the protrusion direction of the protrusions are provided near both ends, and an engagement hole into which the protrusion of the connecting pin fits is provided in the inner wall of the horizontal hole of the movable element on the side of the fixed core. , the height from the tip of the protrusion of the connecting pin to the apex of the convex portion is greater than the height from the inner wall of the horizontal hole of the movable element on the fixed iron core side to the inner wall of the horizontal hole of the movable iron core on the side opposite to the fixed iron core. Also, the height from the bottom surface of the protrusion of the connecting pin to the top of the convex portion is from the inner wall of the side hole of the movable element on the fixed iron core side to the inner wall of the side hole of the movable iron core on the side opposite to the fixed iron core. It is characterized by being set to be smaller than the height up to.

〔Example〕

Hereinafter, the present invention will be specifically explained based on embodiments shown in the drawings. FIG. 2 is a perspective view of the connecting pin 3 according to the present invention seen from the back. This connecting pin 3
has ejected protrusions 3a and 3b protruding from the distal and proximal ends, respectively, and a chevron-shaped convex portion 3c protruding in the opposite direction to the protruding direction of the ejected protrusions 3a and 3b is formed in the center. Furthermore, an L-shaped bent portion 3d is formed at the base end. This connecting pin 3
is made of an elastic material such as steel.

What is shown in FIG. 3 is an explanatory diagram of a state in which the movable element 1 and the movable iron core 2 are connected using the connecting pin 3. The movable element 1 and the movable core 2 are fitted into each other, and, for example, a fitting groove is provided in the connecting portion of the movable element 1, and the movable iron core 2 is fitted into the fitting groove. The mover 1 is provided with horizontal holes 1a, 1b and engagement holes 1c, 1d in the inner walls of the horizontal holes 1a, 1b. 2a is formed. 4 is mover 1
This spring is fitted between the movable core 2 and the movable core 2, and automatically adjusts the attitude of the movable core 2 so that the magnetic pole surface of the movable core 2 aligns and closely contacts the magnetic pole surface of the fixed core when the electromagnet is attracted.

In FIG. 3, first, as shown in a, the movable iron core 2 is pressed against the movable element 1 to the upper limit position, and the connecting pin 3 is inserted into the horizontal hole 1 while the spring 4 is compressed.
a, 1b, 2a, the protrusion 3a at the tip of the connecting pin 3 will fit into the horizontal hole 1 of the mover 1, as shown in b.
When approaching the entrance of hole a, the height of the upper surface of the horizontal hole 2a relative to the lower surface of the horizontal holes 1a and 1b is set smaller than the height of the chevron-shaped convex portion 3c relative to the straight line connecting the projections 3a and 3b. Connecting pin 3
If the connecting pin 3 is pushed in forcibly, it passes through the horizontal hole while being bent, and when the protrusions 3a and 3b are fitted into the engagement holes 1c and 1d, the connecting pin 3 returns to its original natural state as shown in c, and the protrusion 3a , 3b and engagement hole 1
The connection pin 3 is prevented from coming off by the engagement of the pins c and 1d. In this final state, the connecting pin 3 is connected to the horizontal holes 1a, 1
The movable iron core 2 is separated from the mover 1 by a spring 4 so that it can move up and down slightly with respect to b and 2a, and the height of the protrusions 3a and 3b is larger than the stroke of the up and down movement. The height from the tip of the protrusion of the connecting pin to the apex of the convex portion is set from the inner wall of the side hole of the movable element on the side of the fixed iron core to the side hole of the movable iron core, so that the height from the tip of the projection of the connecting pin to the top of the protrusion is The height from the inner wall of the horizontal hole of the movable element on the side of the fixed core is greater than the height from the bottom of the protrusion of the connecting pin to the top of the convex part. The dimensions of each part are set to be smaller than the height of the horizontal hole of the iron core to the inner wall on the opposite side from the fixed iron core. By providing this gap and the gap around the connecting pin 3 and elastically holding it by the spring 4,
It is possible to achieve alignment of the armature surface when the iron core is attracted.
Note that if the protrusion 3a at the tip of the connecting pin 3 is tapered, the connecting pin can pass through the step at the entrance of the horizontal hole 1a without getting caught when inserted.

FIG. 4 is an embodiment showing the overall structure of an electromagnetic contactor equipped with a coupling device according to the present invention, in which 5 is a casing, 11 is a movable contact disposed on the mover 1, and 12 is a fixed contact. 13 is a fixed iron core, 14 is an excitation coil, 15 is a repulsion spring that restores the mover 1 upward when it is not energized, 16 is a substrate for fixing the fixed iron core 13, and 17 is this substrate 16
18 is a spacer; 19 is a cushioning rubber seat for shock absorption interposed between the spacer 18 and the fixed core 13; 20 is the core receiver box 1;
A pin 2 movably connecting 7 and the fixed iron core 13;
1 is a fixed iron core 1 that receives the other end of a coil spring 23 whose one end is fixed to the frame 22 of the excitation coil 14.
3 is pressed against the substrate 16, and the spring seat 2
Reference numeral 4 denotes a voltage display plate made of thermoplastic resin, which has one end locked to the coil frame 22 and the other end exposed outside the casing 5.

When the coupling device of the present invention is applied to an electromagnetic contactor having such a configuration, when the movable core 2 is attracted to the fixed core 13, the convex portion 3c of the coupling pin 3 connects the fixed core within the side hole 2a of the movable core 2. Since the protrusions 3a and 3b are fitted into the engagement holes 1c and 1d of the horizontal holes 1a and 1b of the movable element 1, the connecting pin 3 will not come off from the horizontal holes. Furthermore, even when the upper surface of the movable iron core 2 is in close contact with the upper bottom surface of the fitting groove of the movable element 1, the connecting pin 3 is moved from the engaging holes 1c, 1d by the elasticity of the central convex portion 3c so that the protrusions 3a, 3b on both sides Since it cannot be removed, the connecting pin 3 will not be removed from the side hole.

Further, a gap is provided at the engagement portion between the movable core 2 and the movable element 1, and is elastically held by the spring 4, so that alignment and close contact of the armature surfaces when the core is attracted can be achieved.

[Effect of idea]

As explained above, in the present invention, the movable element and the movable iron core are connected by a connecting pin provided with a protrusion and a convex portion, and an engagement hole provided in the side hole of the movable element. It requires fewer parts than other devices, and can be easily assembled.

In addition, due to the dimensional relationship between the convex portion, the protrusion, and each side hole, the connecting pin will not fall out after installation, and the gap between the movable core and the mover will ensure alignment and close contact of the armature surface when the core is attracted. I can do it.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing a conventional coupling device, Fig. 2 is a perspective view of a coupling pin according to the present invention, Fig. 3 is an explanatory diagram showing the coupling work process, and Fig. 4 is a diagram showing a coupling device according to the present invention. FIG. 3 is a sectional view of a magnetic contactor. 1...Mover, 1a, 1b...Horizontal hole, 1c, 1
d...Engagement hole, 2...Movable iron core, 2a...Horizontal hole,
3... Connection pin, 3a, 3b... Embossed protrusion, 3c
...Chevron-shaped convex portion, 3d...Bending portion, 4...Spring, 5
...Casing, 11...Movable contact, 12...
Fixed contact, 13... Fixed iron core, 14... Exciting coil, 15... Repulsion spring, 16... Substrate, 17...
...Iron core receiver box, 18...Spacer, 19...Buffer rubber seat, 20...Pin, 21...Spring seat, 2
2... Frame, 23... Coil spring, 24...
Voltage display board.

Claims (1)

[Scope of utility model registration request] A device for connecting a movable element having a movable contact of an electromagnetic contactor and a movable core of an electromagnet, wherein horizontal holes are provided in corresponding connection parts of the movable element and the movable core, the center lines of which substantially coincide with each other, and , a connecting pin made of an elastic plate passing through both of these horizontal holes is provided, a convex portion is provided in the longitudinal center of the connecting pin, and protrusions protruding in the opposite direction to the protruding direction of the convex portion are provided near both ends of the connecting pin. The inner wall of the horizontal hole of the movable element on the side of the fixed core is provided with an engagement hole into which the protrusion of the connecting pin fits, and the height from the tip of the protrusion of the connecting pin to the apex of the convex portion is equal to the height of the protrusion of the connecting pin. The height should be greater than the height from the inner wall of the side hole of the movable element on the side of the fixed iron core to the inner wall of the side hole of the movable iron on the side opposite to the fixed iron core, and the height from the bottom of the protrusion of the connecting pin to the top of the convex part. In an electromagnetic contactor, the height is set to be smaller than the height from the inner wall of the side hole of the movable element on the side of the fixed iron core to the inner wall of the side hole of the movable iron core on the side opposite to the fixed iron core. Electromagnetic coupling device.