JPS59123206A - Polarized electromagnet device - Google Patents

Abstract

PURPOSE:To insure the attraction force even if the stroke is extended by a method wherein the 1st yoke with U-shape is provided and the 2nd yoke is provided inside the 1st yoke and the 3rd yoke is provided between the pole contact surface of the 1st yoke and an armature and a relaying part made of magnetic material is provided in a magnetic gap. CONSTITUTION:The 2nd yoke 2 is provided inside the 1st yoke with U-shape in parallel to a horizontal piece 1b through a permanent magnet 3 and an armature 6, which moves horizontally between left and right pole contact surfaces of the 1st yoke 1. The 3rd yokes 10, 10, which travel horizontally in accordance with the movement of the armature 6, are provided between the armature 6 and the left and right pole contact surface. With this constitution, magnetic gaps A, F between the left and right 3rd yokes 10, 10 and the left and right pole pieces 1a, 1c of the 1st yoke 1 can be utilized as a traveling stroke of the armature 6 so that the attraction force is not deteriorated even if the stroke of a plunger 5 is extended.

Description

[Detailed Description of the Invention] (Field of Application) The present invention involves interposing a permanent magnet in a magnetic path consisting of an armature and a yoke, and superimposing the magnetomotive force of a coil on the magnetic flux of this permanent magnet. The present invention relates to a so-called polarized electromagnet device that horizontally moves an armature, and particularly to a polarized electromagnet device that obtains a long stroke.

(Background Art) When a conventional polarized electromagnet device is explained with reference to FIG. 1, it consists of a pair of upper and lower magnets. Inside the upper and lower yokes 1.1, a pair of 0-shaped second yokes 2 are arranged parallel to the horizontal piece 1b. The outer surfaces of the left and right pieces 2a and 2C of the second yoke serve as the polarizing surfaces. Horizontal piece 1b of both yokes.

A permanent magnet 6 whose magnetization axis direction is perpendicular is interposed between the magnets 2b and 2b. 4 is the left and right side pieces ia of the upper and lower first yokes 1, 1;
1c and the left and right side pieces 2a of the upper and lower second yokes 2, 2,
These are left and right armature plates that face the armature surface of 2c and have both inner and outer surfaces as armature surfaces. The left and right armature plates are integrated by a plunger 5 to form a horizontally moving armature 6 that separates from the armature surfaces of the first yokes 1, 1 and the second yokes 2, 2. An operating rod 7 is provided on the left and right extensions of the plunger 5 of this amateur. The left and right operating rods 7, 7 are preferably made of non-magnetic material. 8 is a coil for moving the left and right armature plates 4°4 in the horizontal direction. Although not shown, it is wound around a coil frame, and the plunger 5 is inserted into a through hole of the coil frame. In #1, the magnetic flux due to permanent magnet B flows as follows. ct31. yi2 - N pole of permanent magnet 6 → horizontal piece 1 of first yoke 1 → left side 1a or right side 1C → air gap a or d → left or right armature plate →
Air gap b or C→left piece 2a or right piece 2C of second yoke 2→horizontal piece 2b→S pole of Mizuku magnet 3.

G8 = N pole of permanent magnet 6 → horizontal piece 1b of first yoke 1 →
Same left side 1a → Air gap a → Left amateur plate 4 → Plunger 5 → Right amateur plate 4 → Air gap C + 12 Right side 2C of yoke 2 → Same horizontal piece 2b
→The left and right armature plates 4.4 maintain the attracted state shown in the figure due to the magnetic flux of the 8 poles of the permanent magnet B above. In order to move the left and right armature plates 4, 4 in the direction of the arrow P, a voltage is applied to the coil 8 to generate a magnetic flux in the opposite direction to the magnetic flux 8. The flow of magnetic flux at this time is as follows.

4-Plunger 5 → Left armature plate 4 → Air gap a → Left piece 1a of first yoke 1 → Horizontal piece 1b
→ Same right side 1C → Air gap d → Right armature plate 4 → Plunger 5°g65 = Plunger 5 → Left armature plate 4 → Air gap b → Left side 2a of second yoke 2 → Same horizontal piece 2b → Same right side 2C → Right armature plate 4 → Plunger 5° Due to the magnetic flux from this coil 8 and the magnetic flux from the permanent magnet, in air gaps a and c, the magnetic fluxes are in both directions or in opposite directions, and the magnetic attraction force is small, and in air gaps b and d, both magnetic fluxes are in opposite directions. They will be in the same direction and the magnetic attraction will be large. Therefore, the left and right armature plates 4.4 move in the direction of the arrow P- and are attracted by the air gaps b and d. At this time, if the air gaps b and d are lengthened in order to lengthen the moving stroke of the plunger 5, suction force can be secured, and the plunger 5 will become inoperable. Therefore, the conventional polar type! In magnet devices, it has been impossible to ensure a long stroke and obtain sufficient suction force.

(Purpose) The present invention has been made in view of the above points, and that is, a U-shaped first yoke facing a horizontally moving type armature and a second yoke formed inside the U-shaped first yoke are used as magnet devices. By providing a sixth yoke between the armature surface of the first yoke and the armature, and providing a relay part made of a magnetic material in the magnetic gear knob, a polarized electromagnet that can maintain attractive force even if the stroke is lengthened. The purpose is to provide equipment.

[Disclosure of the invention]

(Example) Below, the differences from the conventional example will be explained based on FIG. 2 shown as an example.
4 and the left and right side pieces la of the first yoke 1.

This is the sixth yoke on the left and right located between 10 and 10. Both the inner and outer surfaces of this sixth yoke are polarized surfaces, and the first yoke 1,
It faces the armature surface of the second yoke 2. Then, it moves horizontally as the plunger 5 moves. The upper and lower ends of the left and right sixth yokes are close to and magnetically coupled to the upper and lower first yokes 1, 1.

Reference numeral 11 denotes left and right compression springs interposed between the left and right sixth yoke 10.1 [1 and the left and right side pieces ia and 1c of the first yoke 1. This forces the 6th yoke on the left and right to the amateur side. 12 is a pin that supports the left and right sixth yokes 10 and 10 on the left and right sides ia and 'lc of the first yoke. With this, the armature 6 is held in a predetermined position, and the left and right side pieces 1a, ic of the first yoke are
The compression spring 11 is inserted through the hole, and is fixed to the left and right sixth yokes 10 and 10 through the inner hole of the compression spring 11. As a result, the left and right sixth yokes 10.10 can be moved a predetermined distance in the horizontal direction. A, B, O, D, E, and F represent air gaps, respectively, between the left side piece 1a of the first yoke 1 and the left sixth yoke 10, between the left sixth yoke 10 and the left amateur plate 4, and between the left amateur plate 4 and the left armature plate 4. Between the left side piece 2 of the second yoke 2, between the right side piece 2C of the second yoke 2 and the right armature plate 4, between the right armature 4 and the right sixth yoke 10,
It is between the right third yoke 10 and the right side piece 10 of the first yoke 1.

(Operation) Next, one embodiment of the present invention will be explained based on FIGS. 6 to 6. FIG. 6 shows the initial state in which the coil 8 is not energized. The magnet armature 6 and the left sixth yoke 10 are attracted and held by the left side 1a of the first yoke 1 and the right side 2C of the second yoke 2 by the magnetic flux produced by the permanent magnet B.

Next, the coil 8 is excited in the opposite direction to the magnetic flux 6 to reduce the magnetic flux 7. When G8 is generated, the magnetic fluxes in air gaps A and D are in opposite directions, and the attractive force decreases, causing gap C2
At E, the suction force works. For this reason, amateur 6 is in the direction of the arrow P.
begins to move.

Next, when the armature 6 moves to the position shown in FIG. 4, the gap is 0. At E, the distance becomes narrower, and the magnetic flux y due to the coil
At the same time as iq, yJ8 increases, the magnetic fluxes 9, mlO, 11 due to the permanent magnet 6 are superimposed, and the attractive force in the direction of the arrow P increases.

Next, as shown in FIG.
When the left amateur plate 4 separates, the plunger 5
The magnetic flux caused by the permanent magnet 6 that flows in this direction becomes a reversal end 12 in the opposite direction to the above-mentioned end 11. At this time, the magnetic path of f112 is as follows: N pole of permanent magnetic flux 6 → gear between horizontal piece 1B of first yoke 1 and upper end of right sixth yoke 10 → right third yoke 10 → right armature plate 4 → plan jar 5 → left armature plate 4 → left piece 2a of second yoke 2 → horizontal piece 2b → S pole of permanent magnetic flux 6.

This magnetic flux increases the magnetic flux in the gap C, increasing the attractive force and further moving in the direction of the arrow P.

Then, as shown in FIG. 6, the operation of the right sixth yoke 10 and the first yoke is completed.

Even after the excitation of the coil 8 is cut off, the attracted state is maintained by the permanent magnet B. If the excitation current is reversed, the Amachi Aro will operate in the opposite direction.

(Effects) As described above, the present invention configures the second yoke 2 inside the U-shaped first yoke 1 in parallel with its horizontal piece 1b via the permanent magnet 6, and both the left and right armatures rfi' In a polarized electromagnetic device in which an armature 6 is disposed horizontally between the armature 6 and the left and right polarized surfaces of the first yoke 1, a third yoke io is arranged between the armature 6 and the left and right polarized surfaces of the first yoke 1, and a third yoke io that is horizontally displaced as the armature 6 moves; io
Compared to conventional polarized electromagnet devices, the left and right sixth yokes 10.10 and the left and right sides of the first yoke 1 ia,
The magnetic gaps A and F between the ICs can be used as the movement stroke of the armature 6, and therefore a polarized electromagnetic device can be obtained in which the attractive force does not decrease even if the stroke of the plunger is lengthened.

[Brief explanation of drawings]

FIG. 1 shows a conventional example of a polarized electromagnet device, and FIG. 2 shows an embodiment of the polarized electromagnet device of the present invention.
The figure is an explanatory diagram of the operation of the present invention. 1 - first yoke, 1a = left side of the first yoke, ib = horizontal piece of the first yoke, ic = right side of the first yoke, 2 = second yoke, 2a - left side of the second yoke, 2b = 2nd horizontal piece of yoke, 2c 2nd right side of 2nd yoke, 3-permanent magnet, 42-left and right armature plates, 5-plunger,
6-armature, 8=coil, 1o-left and right 6th yoke, 1°=left and right 6th yoke 11=compression spring, 12
= pin. Patent applicant Matsushita Electric Works Co., Ltd. Representative patent attorney Toshimaru Takemoto (and 2 others)

Claims (1)

[Claims] (1) A U-shaped first yoke consisting of left and right side pieces whose inner surfaces are polarized surfaces and a horizontal piece that integrates these left and right side pieces, and a length shorter than the length between the left and right side pieces of this first yoke. a second yoke that faces the horizontal piece and has left and right outer surfaces as polarized surfaces; a permanent magnet interposed between the first yoke and the second yoke with a magnetization axis perpendicular to the second yoke; It is composed of left and right armature plates that face the armature surfaces of the left and right side pieces of the yoke and the armature surface of the second yoke and have both inner and outer surfaces as armature surfaces, and a plunger that integrates the left and right armature plates. A horizontally movable armature that separates from each of the armature surfaces of the first yoke and the second yoke, a coil into which the plunger of this armature is inserted so as to be horizontally movable, and further the armature plates on the left and right and the first and -1 armatures. - A horizontally movable left and right sixth yoke with both inner and outer surfaces facing the armature surfaces located between the left and right sides of the arm, and a horizontally movable left and right sixth yoke that presses against the amateur side. At the same time, the armature is held at a predetermined position between the armature and the first yoke, and a support section is configured to allow suction movement in one direction on the left and right sides of the first yoke as the armature moves. Polar electromagnet device.