KR900000830Y1 - Electromagnetic contactor - Google Patents

Abstract

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Description

Magnetic contactor of reversible motor

1 is a circuit diagram showing an outline of an embodiment of a magnetic contactor of a reversible motor of the present invention.

2 is an exploded perspective view of a partially omitted interior of the same housing.

3a and 3b show, respectively, a plan view of the movable contact portion and a partial exploded view of the main portion;

4a and 4b are exploded views of the same principal parts as the fixed contact plan views, respectively.

Figure 5 is a side cross-sectional view of one side of the housing incision.

6 is a cross-sectional view taken along line VI-VI of FIG. 3a.

7 is a cross-sectional view of Ⅶ-Ⅶ.

8A and 8B are the same X-VIII cross-sectional views showing before and after operation.

* Explanation of symbols for main parts of the drawings

10: starter 11: housing

12.13.51.52: electromagnetic coil 20: movable contact

21: movable member 22.221: sulfin

24: movable contact piece 28: coil spring

29: snap 40a.40b: electromagnet

41.43: movable core 61: link plate

The present invention relates to an electromagnetic contactor (conductor) for forward and reverse switching of the reversible motor, and more particularly, to an electromagnetic contactor capable of integrally switching forward and reverse rotation.

Motors that can switch between purification and reverse rotation are used in various industries. In the case of switching to the reverse rotation, an indispensable starter is a so-called magnetic contactor (conductor).

Generally speaking, the configuration of a reversible magnetic contactor capable of switching to reverse rotation is established by assembling an electromagnetic contactor operated by two electromagnets, and at the same time with a power supply on the forward rotation side. An interlock mechanism is provided between the two magnetic contactors to prevent the power supply on the reverse side from being accidentally turned on at the same time.

In addition. Wiring between wires is necessary.

In addition, there is also a housing of other organizations, which is called an integrated reversible magnetic contactor.

However, in the configuration of the reversible magnetic contactor as described above, two or more magnetic contactors must be assembled as the minimum unit of the configuration, so as to prevent a significant miss in that the occupancy volume increases and at the same time the power of the forward and reverse rotation is turned on in the motor. Since the parallelism of the interlock mechanism becomes large, the volume of the housing is further increased.

In addition, since not only 20-24 contact terminals exist in one magnetic contactor, but also it is necessary to use the wiring which runs between each magnetic contactor. It is troublesome to construct and it is easy to produce wiring mistake.

In addition, although the construction of the interlock mechanism described above by employing a mechanical device is relatively simple to configure, there is a drawback that it is easy to fail.

In addition, the so-called integrated reversible electromagnetic contactor in the prior art is actually only two electromagnetic contactors and only one housing, so there is still a problem.

The present invention has been made on the basis of the above situation, and the configuration of the reversible magnetic contactor is simplified, the number of movable parts and contact terminals is reduced to the minimum, and the wiring is simplified to minimize the size of a single magnetic contactor. It is also an object of the present invention to provide a robust integrated magnetic contactor that is constructed by interlocking mechanisms to prevent short circuits by simultaneously supplying static electricity into the structure of the magnetic contactor itself.

In order to solve the problems described above, the present invention provides a housing, a fixing member having a concave attachment hole for fixing a set of contact surfaces installed in the housing in a predetermined arrangement, and the attachment of two fixing members. A plurality of fixed contact surfaces attached to the holes, and the movable members and movable members holding the multiple movable contact surfaces fixed in such a manner as to correspond to each other with the fixed contact surfaces, each movable contact surface being normally opened for each corresponding fixed contact piece. And a support point device, which is a support point when moving while maintaining the state, and a flexible conducting piece for forming an input circuit in correspondence with each of the fixed contact surfaces of the aforementioned sets of fixing members. A movable core, which is opposed to both of the pair of each of the aforementioned support point devices, is an electromagnet linked to at least one of the pair of movable members. When one electromagnet is excited, a movable member uses a support point device as a support point, and any one of the above-mentioned movable contact pieces and a set of fixed contact pieces respectively contact each other, and the forward rotation of the reversible motor or the like. The input circuit is characterized in that the open state for the reverse rotation.

The present invention is fixed to the set of contactors stored in the housing in the connection terminal of the input circuit for rotating the reversible motor forward and the input circuit for reverse rotation, respectively, connected to a common power source; By selective contact of the contact piece with several movable contact pieces.

Each fixed contact surface consists of each contact piece which is elastically connected to the forward rotation terminal and the reverse rotation terminal via a flexible conductive piece, and is attached to a fixed member installed in the housing in a predetermined arrangement. It is attached to the movable member which can move the selective contact with respect to the fixed contact surface. In the housing, an electromagnet having a pair of movable cores is also attached, and the movable cores of the respective electromagnets are linked to the movable members, respectively.

Accordingly, when one of the electromagnets is excited, the movable core moves the movable member accordingly, and the movable contact piece is brought into contact with the fixed contact surface on the forward or reverse rotation circuit side, thereby making the motor forward or reverse rotation. The motor will be rotated forward or reverse.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

1 is a schematic circuit line of the electromagnetic contactor (hereinafter referred to as starter) of the present invention, and FIG. 2 is an exploded perspective view of the same part partially omitted from the inside of the housing.

The starter 10 is almost covered by the housing 11 which assembled the structure mentioned later except the upper surface part.

Five junction terminals C ₂ b, R and S in accordance with the two opposite numbers of the upper part of the housing 11 described above. T, C _l a and _l b C, U, V, W, C ₂ is a, and installing the joint terminal G on the other jjokbyeon.

Since this embodiment is in the form of a three-phase four-wire type, the terminals U, R, S, and T are connected to the power supply, and the terminals, V, and W are respectively connected to the M side of the reversible motor.

In addition, the terminals C _l a and C ₁ b protect the switch S _{1, the} electromagnetic coil 12 and the overcurrent relay copper, and are connected in series with the switches S ₄ and S ₅ to provide an excitation circuit for forward rotation of the reversible motor M. When the switch S ₁ is closed, the electromagnetic coil 12 is excited to operate one electromagnet to connect each junction P ₁ . P ₂ . The power supply and the forward rotation input circuit of the reversible motor M are connected by closing P ₄ .

Similarly, when the electrons C ₂ a, C ₂ b coil 13 and switches S ₂ , S ₄ , and S ₅ form an excitation circuit for reverse rotation, and the switch S ₂ is closed, the coil 13 is excited And the other electromagnets actuate each junction P ₅ , P ₆ ,. Close P ₈ to reverse the reversible motor M. Connect power to this circuit.

As the reverse rotation input circuit, the rotation of the motor M can be reversed by changing the connection of the first phase and the second phase terminals R and S on the power supply side to the terminals V and U on the opposite side from the output side, respectively. .

In this example, the switches S ₁ and S ₂ take the form of a single-pole double end switch, and the housing 11 of the starter 10 has a shape in which an operation switch is exposed.

The main configuration of the starter 10 is composed of a movable contact portion 20, a fixed contact portion 30 of the stop portion and an electromagnet portion 40 of the lower portion.

The foregoing is again described with reference to FIGS. 3A, 3B and 5 and the movable contact portion 20 is biased against the open upper surface of the housing 11.

The movable contact portion 20 is a movable member 21 in the shape of a tree branch split from side to side, commonly called a carrier. Movable contact pieces 24 and 24 attached to the coil spring 28 and the snap 29 which extrapolate four of these branches to the pair of screws 27 on the left and right ends, respectively. Equipped with

Each contact surface 24 is connected to the corresponding terminal U, V, W.G, for example by the junction terminal G (or W) etc. by the conducting wire 25, the screw 26, etc., respectively.

The movable member 21 is provided so that several pins 23 protrude out along the center line of the lower surface part, and the tongue pieces 22 which protrude from the lower surface part in the outermost branch tip part of both ends. 22 and 221. 221 are provided and the short pins 222, 222, 222, 222 are protruded in both ends in order to connect them with an electromagnet described later with an angle therebetween. .

As you can see now in Figures 1 and 3b. Terminal P ₁ , P ₂ . Contact pins 241, 242, 243 and 244 corresponding to P ₃ and P ₄ are mounted so that the terminals P ₅ , P ₆ ,. … Contact pieces 245 and 246 corresponding to P ₈ . … There is 248.

next. The fixing member 31 formed to extend from the housing 11 in FIGS. 2 and 4a.4b and 5 has a recessed portion for attaching several sets of fixed contact pieces to be described later in the fixed contact portion 30. The contact piece 331 is screwed on it.

The contact piece 331 is attached to the fixing member 31. "Conductive connection with the upright conductor 361 which contacted below the flexible contact piece 351 bent in the shape and extended indirectly downward.

The contact piece 336 is completely symmetrical to the concave portion opposite to the contact piece 331 of the fixing member 31, " "The male flexible contact piece 352 and the upright conductor 362 are electrically connected.

It will be clear here that the contact pieces 331 and 336 are the junction terminals C ₂ b and D ₁ b in FIG. ₁ .

Meanwhile. The terminals R and S are connected to the ferrules V and U by S-shaped conductors 371 and 372, respectively, and are insulated by inserting an insulator 38 where the conductors 371 and 372 intersect. The terminals T and W are connected by a conductor 373 and the contact pieces 374 and 375 become terminals C ₂ a and C ₁ a, respectively.

In addition, the fixing member 31 is formed so as to divide each square contact piece by a partition of several partitions, and the pins 23, 23,... Of the movable member 21 in the concave bottom surface. … And pins 32, 32 corresponding to. … Protruding from each other, the two ends of each coil spring 34 are fitted to each other to support the movable member 21 in force, and at the same time, it forms a rotational base of both.

In addition, referring to FIG. 5, the electromagnet portion 40 will be described. The movable cores 41 and 43 and the electromagnetic coils 51 and 52 which can be moved up and down are respectively opposed to the upper portions of the gore 42 and 44 fixed to the lower part of the housing 11. Fixed contacts 30 which constitute the electromagnets 40a and 40b of the pair and the coils 51 and 52 are respectively pointed at one terminal 511 and 521 to the other terminals 512 and 522. The upside conductors 361 and 362 are connected to each other.

Each of the movable cores 41 and 43 is also connected to the movable member 21 by inserting the link plates 61, 61 and 62, 62 at both ends thereof as follows.

That is, both ends of the hanging adjustment rods 612 and 622 inserted into the through holes 411 and 431 and the short pins 222. … The small holes 613, 614, and 623, 624 of the link plates 61, 61, 62, and 62, respectively, are engaged with each other so as to be engaged.

In addition, although one side is abbreviate | omitted (615), it shows the snap snap ring for locking.

Hereinafter, the operation will be described with reference to Figs. 6.7 and 8 which show cross-sectional views taken along the lines VI-VI, VIII-VIII and VIII-VIII respectively in Fig. 3A. When the reversible motor M is rotated forward by pressing the switch S ₁ now, the electromagnet 40a is excited by inputting to the coins 51 and 12, and the movable core 41 moves to the fixed core 42. At the same time, the side of the movable member 21 is pulled downward through the link plates 61 and 61.

As a result, an end portion 241 of each movable contact piece 24. (242). (243). 244 comes in contact with each of the fixed contact pieces attached to the corresponding fixing member 31, respectively.

In FIG. 6, when the movable contact piece 24 was in contact with the fixed contact piece 375, it is actually 244 of 3b, and the movable contact pieces 245,246 and 247 are the same. Each contact with the fixed contact piece connected to the terminal RS T closes the forward rotation input circuit, the input is to rotate the memory motor M forward.

Here, when the movable member 21 is dragged down to the link plate 61. 61, the tongue piece 22 is located only at the outermost corresponding branch line when the forward rotation input circuit of the reversible motor M is closed. At the same time, the flexible contact piece 351 is pushed away from the fixed contact piece 331.

As a result, the excitation circuit for the reverse rotation of the electromagnetic coil 52 is opened, the electromagnet 40b does not work, and the malfunction of the conventional switch or the switching at the time of switching is difficult. Short circuit protection

In addition, according to the present invention, the adjustment screw 70 which protrudes the distal end portion by inserting the center line of the branched branch to the movable member 21 (refer to FIG. 7) up and down, and the expansion screw 71 which extrapolates it to the fixing member ( 31 so as to be in contact with the bottom surface of the movable member 21 with respect to the fixing member 31, and the movable member 21 is rotated to one side and tilted when the other The side can be reliably separated from the stationary contact piece so that the electromagnet 40b does not return to the other side unless the electromagnet 40b is actuated and tensioned by the link plate 62.

Normally, when the movable member 21 is inclined to either side, it moves apart from the adjusting screw 70 mentioned above, and both ends of the pins 23 and 32 protruding from the fixing members 21 and 31 in large quantities. The expansion force of the inserted screw 34 becomes the axial support force at the support point, and the rotational inclination to the opposite side is also prevented by the refractive resistance.

8A and 8B show operation explanatory diagrams along the line VII-VII of FIG. 3A, and as shown in the drawing, when the movable member 21 is pulled out from one side, one end of the movable contact piece 24 attached thereto is connected to the terminal S. FIG. In contact with the fixed contact piece 372 is connected to the electric power is input to the motor.

Also, as a matter of remark, if the movable contact piece is made of a resilient soluble material, and as shown in Fig. 8B, a gap that can be moved slightly with respect to the movable member is formed, the adjustment screw will reliably open and close between the contacts. It can also be adjusted to make the distance in the open state very small.

In the case where the reversible motor M is reversely rotated, it is only necessary to operate the switch in the reverse rotational position. Then, the electronic member 40b is operated by the coil 52 and the movable member 21 is operated. Pulling down the other side closes the input circuit for reverse rotation.

The present invention is constructed by the contactor as described above. The terminal to be drawn to the power supply and the connection terminal to the motor are terminated by only one set, and the connection terminals in the housing are reduced by about half compared to the conventional one, so that the connection connection in the housing is simplified and correspondingly Also decreases and becomes simpler.

Moreover, as a result, the whole becomes small and stored in a small housing.

In addition, the present invention provides that the fixed contact surface of the reverse rotation on both sides with respect to the movable contact plate is selectively operated by any one of the reverse rotation electromagnets of the movable member. The contact circuit is closed by tilting to one side and the input circuit is closed, and the excitation circuit of the opposite side is pressed and opened by the tongue installed so as to protrude from the movable member. You can move away from the side. At the same time, the dual interlock function, which can cut off the input of the other excitation circuit for operation, prevents malfunctions or short-circuits due to operation errors without any safety measures. It will also be able to provide small and robust electronic contactors.

Claims (6)

A fixing member having a housing and an attachment hole formed of a concave portion provided in the housing to fix a plurality of contact pieces in a predetermined arrangement; a plurality of fixed contact pieces attached to the attachment holes of the fixing member; The movable member which fixedly supported several movable and contact pieces by the arrangement | positioning to correspond to each other, and hold | maintained the movable member so that each movable contact piece may be normally open with respect to each corresponding fixed contact piece. It is replaced by both a support point device serving as a support point when moving, a flexible conductive piece for forming an input circuit in correspondence with each of the fixed contact pieces of the above-mentioned fixed member, and a pair of each of the aforementioned support point devices, respectively. The electromagnet linked at least one of the movable cores with the movable member described above, and when one electromagnet is excited, the movable member serves as a support point and a set of fixed contact pieces corresponding to any one of the movable contact pieces described above. An electromagnetic contactor of a reversible motor, each of which is in contact with each other such that an input circuit for forward rotation or reverse rotation of the reversible motor is closed. The method of claim 1. The above-mentioned support point device is composed of a pin protruding from one side surface of a plurality of movable members, a pin protruding from the fixing member corresponding to these pins, and a coil spring that extends by inserting its zero end into each corresponding pin. Contactor made with. The electromagnetic contactor according to claim 1, wherein the above-mentioned soluble conductive piece is bent in an arc shape. The magnetic contactor according to claim 1, wherein at least two sets of the above-mentioned movable contact pieces are made to close the excitation circuit of the electromagnet. The method of claim 4. The above-mentioned movable member pushes down the above-mentioned available contact piece and open | releases it with the fixed contact piece, so that a tongue piece may be provided so that the opposing excitation circuit can be opened. The electromagnetic contactor according to claim 1, wherein the movable core portions of the electromagnets described above are to be linked with the movable members described above by link plates each having an attachment hole formed therein.