JPH0682746U - Electromagnetic contactor - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an electromagnetic contactor in which the adjusting member can be replaced without removing the second yoke, which facilitates the work of adjusting the suction force of the armature. [Structure] A coil frame 21 including a winding part 28 around which a coil 27 is wound and a collar part 30 continuously provided at both ends of the winding part, and an armature 22 movably supported in an inner hole of the coil frame. , A first yoke 23 arranged parallel to the armature advancing / retreating direction, a second yoke 24 in which the left and right side pieces 39 are fitted to the flange portion of the coil frame and sandwich the first yoke, An electromagnetic contactor including a permanent magnet 25 interposed between the first and second yokes, and an adjusting member 26 arranged between the flange portion of the coil frame and the left and right side pieces of the second yoke to adjust the attraction force of the armature. In the above, the collar portion of the coil frame is provided with the insertion portion 29 into which the adjustment member is detachably inserted while the left and right side pieces of the second yoke are fitted.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a polarized electromagnetic contactor.

[0002]

[Prior art]

 There is an electromagnetic contactor of this type shown in FIG. In the figure, reference numeral 21 denotes a coil frame, which has a winding portion 28 around which the coil 27 is wound and a collar portion 30 that is continuously provided at both ends of the winding portion 28. The collar portion 30 holds the left and right side pieces of the second yoke, which will be described later, in a sandwiched state. An armature 22 is supported in the inner hole of the coil frame 21 so as to be able to move back and forth. Reference numeral 23 is a first yoke, which is arranged parallel to the advancing / retreating direction of the armature 22 and is held in a state of being fitted between the collar portions 30, 30. Reference numeral 24 is a second yoke, and the left and right side pieces 39 are arranged so as to fit in the flange portion 30 of the coil frame 21 and sandwich the first yoke 23. A permanent magnet 25 is interposed between the first yoke 23 and the second yoke 24. Reference numeral 26 is an adjusting member for adjusting the suction force of the armature 22, which is formed in a substantially U shape with a non-magnetic material such as plastic. After removing the second yoke 24 on one side, the collar portion 30 and the collar portion 30 of the coil frame 21 are removed. It is inserted between the left and right side pieces 39 of the second yoke 24.

[0003]

[Problems to be solved by the device]

 In the electromagnetic contactor described above, the adjusting member is inserted between the flange portion of the coil frame and the left and right side pieces of the second yoke after the second yoke on one side is removed, so that the suction force of the armature is reduced. When changing the adjusting member to adjust the force, the second yoke on one side must be removed. Therefore, there is a problem that the work of adjusting the suction force of the armature is troublesome.

The present invention has been made in view of the above problems, and an object of the present invention is to allow the adjustment member to be replaced without removing the second yoke, so that the work of adjusting the suction force of the armature can be performed. An object is to provide an electromagnetic contactor that is easy.

[0005]

[Means for Solving the Problems]

 In order to solve such a problem, an electromagnetic contactor of the present invention is a coil frame including a coil, a winding portion around which the coil is wound and having an inner hole, and a collar portion continuously provided at both ends of the winding portion. An armature that is supported in the inner hole of the coil frame so that it can move back and forth, a first yoke that is arranged parallel to the moving direction of the armature, and left and right side pieces that fit into the flange of the coil frame and the first yoke. The second yoke arranged so as to sandwich the magnet, the permanent magnet interposed between the first and second yokes, the flange portion of the coil frame and the left and right side pieces of the second yoke, and the attraction force of the armature. In the electromagnetic contactor including an adjusting member for adjusting, an insertion portion for removably inserting the adjusting member with the left and right side pieces of the second yoke fitted to the flange portion of the coil frame is provided. is there.

[0006]

[Action]

 According to the configuration of the present invention, the adjusting member can be disposed between the flange portion and the second yoke in a state where the left and right side pieces of the second yoke are fitted in the flange portion of the coil frame, and the second yoke is provided. The adjustment member can be replaced without removing it.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. The members having the same basic functions as those of the conventional example are designated by the same reference numerals.

That is, the electromagnetic contactor 1 is composed of a cover 2 and a body 3. The cover 2 is made of a synthetic resin, and connects the upper wall 4, the lower side walls 5 arranged on both sides of the upper wall 4, the upper wall 4 and the lower side wall 5, and divides them into a plurality of external parts. It is composed of a separate 6 and an internal separate 7 in the same position. External terminal fittings 8 are fixed to the outer chambers on both sides of the cover 2, which are divided by both side walls 5 and an external separate 6. This external terminal metal fitting 8 has a vertical insert blade 9 integrally formed on one side. The other external terminal fitting 8 is provided with a fixed contact 10 and is located in the inner chamber 11 on both sides divided by the inner separate 7. The upper wall 4 of the cover 2 is further covered with the terminal cover 12. Further, a movable table 14 is located in the cavity 13 of the lower opening of the cover 2. The movable base 14 has a lateral hole 15 formed at a position corresponding to the inner chamber 11 of the cover 2, in which the contact plates 16 protruding on both sides and the both ends of the contact plate 16 are attached. And a coil spring 18 for contact pressure. The contact point 17 of the movable base 14 and the contact point 10 of the cover 2 face each other in the inner chamber 11, and are separated by the movement of the movable base 14. The movable base 14 is returned by the coil spring 19, and the fall of the movable base 14 is blocked by the insulating plate 20.

The body 3 is made of synthetic resin, and has an electromagnet device including a coil frame 21, an armature 22, first and second yokes 23 and 24, a permanent magnet 25, and an adjusting member 26 therein. In addition, the reversing lever 42 that drives the movable base 14 is housed. The coil frame 21 is composed of a winding portion 28 around which a coil 27 is wound and collar portions 30 and 30 which hold the second yoke 24 fitted to both ends thereof. The winding part 28 has an inner hole 31 for holding the armature 22 so that the armature 22 can move back and forth. The collar portions 30 and 30 are provided with an insertion portion 29 into which the adjustment member 26 is detachably inserted in a state in which left and right side pieces of a second yoke, which will be described later, are fitted. In addition, the right collar 30 is provided with a groove 33 for inserting and installing the blade receiving terminal metal fitting 32 to which the coil 27 is connected.When the body 3 and the cover 2 are combined, Insert the plug blade 9 into 32 and complete the electrical connection with the coil 27. The armature 22 is formed in an H shape by the left and right side pieces 34, 34 and a horizontal bar 35 connecting the left and right side pieces 34, 34. A mountain-shaped flat plate spring 36 that applies a pressing force in the opposite direction to the coil spring 19 is fixed to the left side piece 34 so that the armature 23 can move to the right when a current is applied to the coil 27.

The first yoke 23 is provided with a recess 37 for fitting and fixing it in the collar portion 30 of the coil frame 21. The second yoke 24 comprises a horizontal piece 38 and left and right side pieces 39, 39 connected to both ends of the second yoke 24 in a substantially U shape, and the distance between the left and right side pieces 39, 39 is longer than that of the first yoke 23. The left and right side pieces 39, 39 are fitted to the flange portions 30, 30 of the coil frame 21 so as to sandwich the first yoke 23. An adjusting member 26 for adjusting the suction force of the armature 22 is arranged between the left and right side pieces 39, 39 of the second yoke 23 and the flange portions 30, 30 of the coil frame 21. The permanent magnet 25 is formed in a rectangular parallelepiped shape and is arranged between the first yoke 23 and the second yoke 24.

The adjusting member 26 is for adjusting the suction force of the armature 22, is formed of a non-magnetic material such as plastic in a substantially concave shape, and has the leg pieces 40, 40 facing each other and the leg pieces 40, 40. It is composed of a connecting piece 41 for connecting the masters. The adjusting member 26 is disposed between the left and right side pieces 39, 39 of the first yoke 23 and the collar portions 30, 30 of the coil frame 21, as described above.

The reversing lever 42 hooks the upper end to the insertion portion 14a of the movable base 14 and passes the shaft 43 through the lower end, fits the shaft 43 into the groove 44a of the connecting body 44 from above, and the right end of the armature 22. 22b is inserted in the connecting body 44. Further, as a method of supporting the reversing lever 42, a shaft 45 is passed through the center thereof, and the shaft 45 is supported by the shaft hole 30a of the right flange portion 30 of the coil frame 21. This reversing lever 42 moves the armature 22 in the Z direction by an electromagnetic force, presses the lower end of the reversing lever 42 with the right end 22b of the armature 22, rotates about the shaft 45, and moves the movable base in FIG. Move 13 to the left.

Next, the operation principle of the armature 22 of this embodiment will be described with reference to FIG. In order to explain the operation, the inner and outer side surfaces of the left and right side pieces 34, 34 of the armature 22 are defined as contact surfaces 34a, 34b, 34c, 34d, and the inner and outer contact surfaces 34a, 34b, 34c, 34d are the first contact surfaces. And the air gaps a, b, c and d respectively facing the inner and outer pole faces 23a, 23b, 24a and 24b of the second yoke 23 and 24. The solid line X is the magnetic flux of the permanent magnet 25, and the dotted line Y is the magnetomotive flux of the coil 27.

In FIG. 4, the magnetic flux X of the permanent magnet 25 is the N pole of the permanent magnet 25 → the first yoke 23 → the air gaps b and c → the left and right side pieces 34 and 34 of the armature 22 → the air gaps a and d → The left and right side pieces 39, 39 of the second yoke 24 → the horizontal piece 38 → the S pole can be traced. When an electric current is applied in the direction A, the magnetic flux Y of the coil 27 is: coil 27 → horizontal bar 35 of the armature 22 → right side piece 34 → air gap d → right side piece 39 of the second yoke 24 → horizontal piece 38. → Left side piece 39 → Air gap a → Left side piece 39 of the armature 22 → Horizontal bar 35 of the armature 22. Further, the air flows from the right side piece 34 of the Amaya 22 to the air gap c → the first yoke 23 → the air gap b → the left side piece 34 of the Amachiya 22 → the horizontal bar 35 of the Amachiya 22. Here, comparing the air gaps a, b, c and d, the directions of the magnetic fluxes X and Y of the permanent magnet 25 and the coil 27 are the same direction in the air gaps b and d, and the air gaps a and c are opposite directions. Has become.

Therefore, the first and second yokes 23 and 24 and the armature 22 cancel each other out in the opposite directions of the magnetic fluxes X and Y, and overlap in the same direction to act as a suction force. 22 moves leftward as indicated by the arrow Z, and the circumscribing pole surface 34d of the right side piece 34 of the armature 22 is attracted to the inscribing pole surface 24b of the right side piece 39 of the second yoke 24, and further, the left side piece 34 of the armature 22. The inscribed pole face 34b is attracted to the circumscribed pole face 23a of the first yoke 23. When the current stops flowing, the movable base 13 is pushed in the W direction by the coil spring 19 as shown in FIG. 2, and the armature 22 is attracted by the magnetic flux of the permanent magnet 25 via the reversing lever 42. Moved away from.

Next, the magnetic attraction force and spring load of the armature 22 of this embodiment will be described with reference to FIG. In the figure, (a) of the X axis is the movement amount of the armature 22 when the adjusting member 26 is not inserted into the insertion portion 29 of the coil frame 21, and (b) is the adjustment member 26 in the insertion portion 29 of the coil frame 21. The amount of movement of the armature 22 when the is inserted, A of the Y-axis is the magnetic attraction force when energized, B is the magnetic attraction force when not energized, and C is the spring load.

That is, when the adjusting member 26 is not inserted, as shown in (a) of the X-axis, looking at the left end of the solid line in FIG. 5, the spring load C is larger than the magnetic attraction force A at the time of energization. The armature 22 does not move because it has stronger force. Further, looking at the right end of the solid line in FIG. 5, conversely, the magnetic attraction force B in the non-energized state is larger than the spring load C, and the armature 22 does not return. Therefore, the adjusting member 26 as in the embodiment is inserted. By inserting the adjusting member 26, the movement amount of the armature 22 becomes as shown in (b) of the X-axis. That is, looking at the left end of the dotted line shown in FIG. 5, the force of the spring load C is smaller than the magnetic attraction force A when energized, and the armature 22 moves. Further, looking at the left end of the dotted line in FIG. 5, the magnetic attraction force B at the time of non-energization is smaller than the load C, and the armature 22 can be restored. The distance between the solid line and the dotted line can be displaced by changing the adjustment member (thickness and type) to be inserted from the insertion portion 29 of the coil frame.

The size and shape of the insertion hole of the coil frame may be appropriately designed according to the size and shape of the adjustment member that can be inserted in the state where the left and right side pieces of the second yoke are fitted.

[0019]

[Effect of device]

 According to the electromagnetic contactor of the present invention, the adjusting member can be replaced without removing the second yoke, which facilitates the work of adjusting the suction force of the armature.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of the present invention.

FIG. 2 is a vertical sectional view thereof.

FIG. 3 is an exploded perspective view thereof.

FIG. 4 is a vertical sectional view as seen from the side surface thereof.

FIG. 5 is an operation explanatory diagram of the armature.

FIG. 6 is an exploded perspective view showing a conventional electromagnetic contactor.

[Explanation of symbols]

 21 Coil frame 22 Armature 23 First yoke 24 Second yoke 25 Permanent magnet 26 Adjusting member 27 Coil 28 Winding part 29 Insert part 30 Collar part 34 Left right side piece

Claims (1)

[Scope of utility model registration request] 1. A coil, a coil frame which is wound with the coil and has an inner hole, and a coil frame including a collar portion which is continuously provided at both ends of the coil part, and is movable back and forth in the inner hole of the coil frame. The armature supported by the armature, the first yoke arranged in parallel with the advancing / retreating direction of the armature, and the second yoke arranged so that the left and right side pieces are fitted to the flange portion of the coil frame and sandwich the first yoke. And a permanent magnet interposed between the first and second yokes, and an adjusting member arranged between the collar portion of the coil frame and the left and right side pieces of the second yoke to adjust the attraction force of the armature, the electromagnetic contact An electromagnetic contactor, characterized in that an insert portion for detachably inserting an adjusting member in a state where the left and right side pieces of the second yoke are fitted is provided in the flange portion of the coil frame.