JPH09180935A - Shaft rotating dc electromagnet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the range of slide movement by a simple structure and to slidingly move an output shaft by large rotational force. SOLUTION: A bobbin, having a flange on both ends and a coil is wound on the body part, is provided in a U-shaped frame consisting of a magnetic body directing to the bottom face side and the aperture side of the frame, and an output shaft 6 is passed through the hollow part of the bobbin and the shaft hole on the bottom face of the frame 1 in a freely rotatable manner. The center part of the long rotary plate 7 is attached to the end part of the output shaft 6, four permanent magnets 8a to 8d, two of which makes a set which are positioned on the left and the right sides, are provided respectively on the inner surface of the opposing frames on the flange positioned on the aperture side of the frame 1, and a rotary plate stopper 4 is provided between the set of permanent magnets attached to the inner surface of each frame.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaft rotating type DC electromagnet which repeatedly rotates an output shaft at a predetermined angle by an electromagnetic force.

[0002]

2. Description of the Related Art Generally, a shaft rotating type DC electromagnet (rotary solenoid) is a device which repeatedly generates a rotating stroke of a predetermined angle on an output shaft by an electromagnetic force, and is widely used as a power source for various automatic control mechanisms. It's being used.

By the way, as a conventional shaft-rotating DC electromagnet (rotary solenoid), there is one in which a linear motion of a plunger-type electromagnet is mechanically converted into a rotary motion to rotate an output shaft by a predetermined angle. Yes (the former).

Further, the ball can be rolled in a case having a solenoid coil housed therein and a plurality of ball races of different depths provided on the concentric circles of the armature provided on the end face side of the case. When the case is inserted, the end face of the case and the armature are brought into contact with each other, and when the solenoid coil is excited, the output shaft attached to the armature is attracted to the base side provided on the case opposite to the armature. There is a structure in which the output shaft is rotated by rolling from a place to a deep place, and when the excitation of the solenoid coil is released, the return spring mounted on the output shaft is used to rotate the output shaft to the original position. (the latter).

However, in the former case in which the linear motion of the plunger is mechanically converted into the rotational motion, the connecting mechanism for transmitting the rotational power to the load becomes complicated and the entire structure becomes complicated.

In the latter case, in which the output shaft is rotated by the excitation of the solenoid coil against the elastic force of the return spring, the rotational force is reduced by that amount, and sufficient rotational force cannot be transmitted to the load. There is a problem that it cannot be used for loads that require a large driving force.

[0007]

Therefore, recently, as a shaft rotating type DC electromagnet capable of obtaining a large turning force, as shown in FIG. 3, permanent magnets 21a and 21b are provided on inner surfaces of a frame 20 surrounded by four sides, which face each other. , 21c and 21d are mounted, and rotary plate stoppers 22a and 22b are attached to one corner portion of the inner surfaces of the adjacent frames to rotate the rotary plate 2
A configuration is considered in which 3 can rotate between its stoppers.

However, although the shaft rotating type DC electromagnet having such a structure can obtain a large turning force, there is a problem that the turning angle becomes small. Further, as a shaft rotation type DC electromagnet for obtaining a large turning angle, as shown in FIG. 4, two permanent magnets 32a and 32b having different polarities are attached to the opposing surfaces of a U-shaped frame 31, respectively, and illustrated. A configuration is considered in which the rotating plate 33 is rotated to the side of the permanent magnet having a different polarity by energizing the rotating plate 33 so that it has the same polarity as that of the permanent magnet on the stopped side by a coil that does not exist. .

However, although a large rotation angle can be obtained in the shaft rotating type DC electromagnet having such a structure, the rotating plate 33 is pulled in the direction of one permanent magnet or receives a repulsive force, so that the output shaft is There is a problem that lateral pressure is applied to one side, an effective turning power cannot be obtained, and durability is poor.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and its object is to rotate the output shaft with a large turning force while increasing the turning range with a simple structure. Type DC electromagnet.

[0011]

In order to achieve the above-mentioned object, the present invention constitutes a shaft rotating type DC electromagnet by the following means. The invention corresponding to claim 1 is a U-shaped frame made of a magnetic material, a bobbin having flanges at both ends, the bobbin being provided so that the flange faces the bottom surface side and the opening side of the magnetic material frame. A coil wound around the body of the bobbin, an output shaft provided by inserting a hollow portion of the bobbin and a shaft hole formed in the bottom surface of the magnetic body frame, and a central portion attached to the end of the output shaft. The long rotating body, four permanent magnets, which are respectively attached to the inner surface of the frame on the flange of the flange located on the opening side of the frame, facing each other on the right and left side by side, and on the inner surface of each frame. And a rotating body stopper provided between each pair of left and right adjacent permanent magnets attached,
The pair of two permanent magnets provided adjacent to each other on the left and right sides are arranged so that their magnetic poles are different and also different from the magnetic poles of the opposing permanent magnets on the frame surface side. Form a fixed magnetic pole.

In the shaft rotating type DC electromagnet of the invention according to claim 1, the rotary plate is attracted and held at two permanent magnet positions of the four permanent magnets mounted on the inner surfaces of the opposing frames. When the coil is energized so that the rotating plate has the same polarity as that of the permanent magnet, the rotating plate is attracted and rotated by two permanent magnet positions of opposite polarities mounted on the inner surface of the opposing frame. The rotary plate is held at the stop position by the rotary plate stopper, and when the coil is de-energized, the rotary plate is attracted to the permanent magnet side and held at the stop position by the rotary body stopper.

Therefore, the rotor is attached to the inner surface of the opposite frame by repeating the energization and stop of the coil.
Since it is possible to reciprocally rotate between the permanent magnets that form a set, it is possible to increase the rotation range and rotate the output shaft with a large turning force. In addition, since the permanent magnet and the frame have no circular portion, not only the structure is simple, but also the manufacturing is easy.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 and FIG. 2 respectively show configuration examples of a shaft rotation type DC electromagnet according to the present invention.
Is a plan view and FIG. 2 is a side sectional view.

In FIGS. 1 and 2, reference numeral 1 denotes a U-shaped frame made of a magnetic material such as iron. Inside this frame 1, bobbins 2 made of synthetic resin having flanges 2a and 2b at both ends are arranged. A coil 3 is wound around the body of the bobbin 2.

In this case, the bobbin 2 has its flange 2a,
2b is provided facing the opening side and the bottom side of the frame 1. Further, on the flange 2a of the bobbin 2 facing the opening side of the frame 1, there are provided rotary plate stoppers 4 projecting from the central portion of the inner surface of the frame to opposite sides, and permanent plates provided on both sides sandwiching the rotary plate stopper 4 therebetween. The magnet holding portions 5 are formed integrally with each other. A bobbin having such a shape and configuration can be easily obtained by injecting a synthetic resin or the like into a mold and integrally molding.

Reference numeral 6 denotes an output shaft which is provided by inserting a hollow portion of the bobbin 2 and a shaft hole provided in the bottom surface of the frame 1, and the center portion of the long rotary plate 7 is provided at the end portion of the output shaft 6. Mounted.

In this case, the rotary plate stopper 4 and the rotary plate 7
The width of is appropriately set according to the rotation range of the rotary plate 7. On the other hand, 8a to 8d are a set of two permanent magnets held by the permanent magnet holding portions 5 on both sides of the rotary plate stopper 4, and each of these permanent magnets 8a to 8d is a set of two adjacent permanent magnets on the same frame side. It is arranged so that the magnetic poles of the permanent magnets are different and that the magnetic poles of the facing permanent magnets on the opposing frame side are different.

Next, the operation of the shaft rotation type DC electromagnet constructed as described above will be described. Now, the rotary plate 7 is attracted by, for example, the magnetic field on the permanent magnets 8b and 8c side, stopped at the position shown by the rotary plate stopper 4, and held. In this case, it is assumed that the polarities of the surfaces of the permanent magnets 8b and 8c facing the rotary plate 7 are N poles.

In such a state, when a coil 3 is energized by a DC power source (not shown) so that the rotary plate 7 becomes the N pole, a repulsive force is generated between the rotary plate 7 and the permanent magnets 8b, 8c. Therefore, the rotary plate 7 is provided with the permanent magnets 8b, 8
The permanent magnet 8 whose polarity on the frame surface side facing c is S pole
It is sucked and rotated on the d and 8a sides, stopped at the position of the rotary plate stopper 4, and sucked and held. In this case, the rotating plate 7 is still attracted by the permanent magnets 8d and 8a even when the energization of the coil 3 is stopped.

Next, when a coil 3 is energized by a DC power source (not shown) so that the rotary plate 7 becomes the S pole, a repulsive force is generated between the rotary plate 7 and the permanent magnets 8d and 8a, and the rotary plate 7 is rotated. Contrary to the above, the permanent magnets 8b and 8c are rotated to the original position and stopped.

By repeating such an operation, the rotary plate 7 can be rotated while reciprocating between the permanent magnets 8b, 8c and 8d, 8a, and the load can be driven through the output shaft 7.

As described above, in this embodiment, the U-shaped frame 1 made of a magnetic material has the flanges 2a, 2 at both ends thereof.
A bobbin 2 having b and having a coil 3 wound around the body is provided with flanges 2a and 2b toward the bottom surface side and the opening side of the frame 1, and is provided in the hollow part of the bobbin 2 and the bottom surface of the frame 1. The output shaft 6 is rotatably provided by passing through the shaft hole, the central portion of the long rotating plate 7 is attached to the end portion of the output shaft 6, and the flange 2a located on the opening side of the frame 1 is further mounted. Four permanent magnets 8a on the inner surface of the opposing frame
Attach 8d to 2d side by side as a set of two,
A rotary plate stopper 4 is provided between each pair of right and left adjacent permanent magnets mounted on the inner surface of each frame.

Therefore, by energizing the coil 3, the long rotating plate 7 is sandwiched between the rotating plate stoppers 4 on the inner surfaces facing each other of the frame, and one of two permanent magnets 8a to 8d is provided on both sides of the rotating plate stopper 4. Since the facing permanent magnets can be reciprocally rotated, the rotation range can be increased, and
Since the output shaft can be rotated with a large rotational force and the number of parts to be assembled and the number of assembling steps are very small, not only the structure can be simplified, but also the manufacturing can be easily performed.

[0025]

As described above, according to the present invention, it is possible to provide a shaft rotating type DC electromagnet which has a simple structure and can widen the turning range and can turn the output shaft with a large turning force. .

[Brief description of the drawings]

FIG. 1 is a plan view showing a cross section of a part of an embodiment of a shaft rotation type DC electromagnet according to the present invention.

FIG. 2 is a side sectional view showing the embodiment.

FIG. 3 is a plan view showing, in a partial cross section, a conventional shaft rotation type DC electromagnet designed to obtain a large turning force.

FIG. 4 is a plan view showing a part of a conventional shaft rotation type DC electromagnet in which a large rotation angle is obtained.

[Explanation of symbols]

 1 ... U-shaped frame made of magnetic material, 2 ... Bobbin, 2a, 2b ... Flange, 3 ... Coil, 4 ... Rotating plate stopper, 5 ... Permanent magnet holding part, 6 ... Output shaft , 7 ... rotating plate, 8a-8d ... permanent magnets.

Claims (1)

[Claims] 1. A U-shaped frame made of a magnetic material,
A bobbin provided with flanges at both ends, the flanges facing the bottom surface side and the opening side of the magnetic body frame, a coil wound around the body of the bobbin, a hollow portion of the bobbin and the magnetic field. An output shaft provided by inserting a shaft hole provided in the bottom surface of the body frame, a long rotating body having a center portion attached to an end portion of the output shaft, and a flange on the opening side of the frame. Rotation provided between each of the four permanent magnets mounted on the inner surfaces of the opposing frames as a set of two left and right adjacent to each other and one pair of the left and right adjacent permanent magnets mounted on the inner surface of each frame. A pair of permanent magnets provided adjacent to each other on the left and right sides are arranged so that the magnetic poles are different and also different from the magnetic poles of the opposing permanent magnets on the frame surface side. The above Axial rotation type DC electromagnet, characterized in that so as to form a pole determined by the current direction of yl.