JPH10184758A - Rotation controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotating damper device which can attain size reduction and be changed arbitrarily so that braking force may become strong. SOLUTION: A plurality of locking pieces 3 are formed radially at a rotor 2 jointed to a shaft 1. A movable piece 4 is disposed between the locking pieces 3, 3, whose periphery is covered with the yoke and a coil 6 and a gap member 7, and a clearance in respective members above is filled with magnetic fluid 5. By passing electric current through the coil 6, the movable piece 4 is attracted by the yoke and the gap member 7, so that braking is applied to the shaft 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotation control device for applying a braking force in a rotating direction to a rotating shaft, and more particularly, to a small-sized and high-gain braking force which can be easily varied. The present invention relates to a rotation control device.

[0002]

2. Description of the Related Art Conventionally, as a technique for applying a braking force in the direction of rotation of a rotating shaft, for example, techniques disclosed in Japanese Patent Publication No. 61-23406 and Japanese Patent Application Laid-Open No. Hei 7-301271 have been disclosed.

[0003]

However, in the former case, when used as a brake, the response speed is slow and the braking force is also weak, so that it is not practical. However, there is a problem that it is impossible to reduce the size of the apparatus.

[0004]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above, and has a plurality of locking pieces made of a nonmagnetic member fixed to a rotating shaft and radially arranged. And a plurality of movable pieces each made of a ferromagnetic member disposed between the locking pieces, and provided on the outer periphery of the movable piece,
A rotation control device comprising the rotation shaft and a field coil unit including a field coil wound substantially concentrically,
A rotation control device that energizes the field coil to attract the movable piece to the inner peripheral surface of the field coil portion, and that the rotational shaft can provide a braking force in the rotational direction by frictional resistance generated on the attracted surface. Is provided.

[0005] The present invention provides a rotation control device in which the locking piece is fixed to a cylindrical rotor concentric with the rotation shaft.

The present invention provides a rotation control device in which a lubricant is filled between the locking piece, the movable piece, and the field coil portion.

The present invention provides a rotation control device in which the lubricant is a magnetic fluid.

[0008] The present invention provides a rotation control device configured to be able to vary the braking force in the rotational direction of the rotating shaft by varying the value of the current supplied to the field coil.

The present invention provides a rotation control device that functions as a rotary damper by changing the value of a current supplied to the field coil so that the braking force in the rotational direction of the rotary shaft functions as a rotary damper.

[0010] The present invention provides a rotation control device that makes the braking force in the rotating direction of the rotating shaft function as a rotating brake by maximizing a current value applied to the field coil.

The present invention provides a rotation control device configured to intermittently supply a current to the field coil so that a vibration element in a rotational direction is applied to a braking force in the rotational direction of the rotating shaft. Is what you do.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a specific configuration of an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a main part of a rotation control device according to an embodiment of the present invention, and FIG. 2 is a vertical cross-sectional view of a main part including a PP line in FIG. In the figure, A is a rotation control device, 1 is a shaft which is a rotation shaft, and 1 'is a bearing of the shaft 1.

Reference numeral 2 denotes a rotor concentrically provided on the outer periphery of the shaft 1. Reference numeral 3 denotes a plurality of nonmagnetic members radially disposed at predetermined intervals on the outer periphery of the rotor 2. It is a locking piece. Numeral 4 denotes a plurality of movable pieces each made of a ferromagnetic member disposed between the locking pieces 3 and 3, and a gap between the shaft 1, the rotor 2, the locking piece 3 and the movable piece 4. Is filled with a magnetic fluid 5 which normally acts as a lubricant.

Reference numeral 6 denotes a coil wound substantially concentrically with the shaft 1, and a pair of yokes 6 made of a ferromagnetic material.
a, 6a. And yoke 6
A ring-shaped gap member 7 made of a non-magnetic material exists between a and 6a, whereby the magnetic force generated by the coil 6 acts so as to be the strongest between the gap members 7.

Reference numerals 8, 8a and 8b denote housings of the rotation control device A, which are made of a member made of a ferromagnetic material so that the magnetic flux generated from the coil 6 does not leak outside. Reference numeral 6a is fixed to the housings 8a and 8b with screws or the like (not shown).

From the above, when the coil 6 is energized, all the movable pieces 4 are attracted to the inner wall portions of the yokes 6a, 6a on the inner peripheral surface of the coil portion and the gap member 7, and the magnetic fluid 5
Flows along the generated magnetic field, and since the movable piece 4 is located between the locking pieces 3 and 3 provided on the outer periphery of the rotor 2, the movable piece 4 and the yokes 6a and 6a The frictional force between the inner wall portion and the gap member 7 acts to generate a braking force on the shaft 1.

The braking force has a correlation with the current flowing through the coil 6, and is specifically as shown in the following table.

[0018]

[Table 1]

The following table shows the internal temperature of the coil 6 at each time when a current of 12 V and 0.5 A is superimposed on the coil 6 under the environment of the rotation control device A at room temperature 22 ° C.

[0020]

[Table 2]

As can be seen from the above table, when 60 minutes or more have elapsed, the internal temperature of the coil 6 becomes constant and does not rise any longer. That is, in the state where the above-described power is applied to the coil 6, even if the rotation control device is used for a predetermined time or more, it is apparent that the coil 6 and the like do not burn out due to an excessive rise in the internal temperature. It will be extremely high.

Next, an embodiment in which the rotation control device A according to the present invention is used as a rotation damper device is shown in FIGS.

First, FIG. 3 shows a first embodiment in which a rotation control device A is used for controlling opening and closing of a door, and the control device is omitted from the drawing. In the figure, 9 is a door, 10 is an entrance,
B is a rotary encoder. The rotation control device A and the rotary encoder B function in conjunction with the rotation axis of the door 9, and the rotary encoder B detects the opening / closing angle and the rotation speed of the door 9 simultaneously.

When the door 9 is closed, the entrance 1
When rotating at a speed equal to or higher than a set value near 0, a current is passed from a control device (not shown) to the rotation control device A to generate a braking force, and a function is provided to apply a brake to the rotation of the door 9. It is to let.

FIG. 4 shows a second embodiment in which a rotation control device A and a rotary encoder B are installed on a rotation shaft of an opening / closing door 11 provided above a passenger seat of an airplane or the like, and the rotation control device A also serves as a rotation brake and a rotation damper. It is an embodiment. In this case, the opening and closing door 11 must be stationary at a predetermined angle as shown by the solid line in the figure against the weight of the opening and closing door 11.

Therefore, when the value of the rotary encoder B is within a predetermined range (fully open state), the rotation control device A supplies power to the rotation control device A from a control device (not shown) to bring the opening / closing door 11 into a state in which the opening / closing door 11 does not close. Set and open and close door 11
When the value of the rotary encoder B is indicated at a position at which the opening and closing of the door 11 is gradually closed, the value of the current supplied from the controller to the rotation controller A is gradually reduced, and the operation of the locking mechanism of the door 11 is performed. Is configured to lock in a closed state.

FIG. 5 is a block diagram showing a third embodiment of the present invention in which a rotation damper is constructed by using a rotation control device A in an automobile game machine. In FIG. 5, B is a rotary encoder, C is a steering wheel, and D is a steering wheel. Is a steering wheel load control device, E is a central control device, F is an image generation device, and G is a display.

First, the player of the car game machine operates the steering wheel C while watching the screen of the display G. At this time, the rotation direction and rotation speed of the shaft 1 mechanically connected to the handle C are detected by the rotary encoder B directly connected to the shaft 1 and output to the handle load control device D.

The rotation direction and rotation speed data of the shaft 1 are sent to the central control unit E to calculate a balance with the image information, and the image data is output from the image generator F to the display G. Via the handle load control device D, outputs a control current based on the braking force corresponding to the image displayed on the display G to the rotation control device A,
The rotation control device A generates a braking force based on this current value, whereby the player feels the reaction force of the steering wheel C, and can enjoy a sense of reality in a car game.

In order to control the rotation control device A so that an intermittent current is applied, an intermittent braking force is generated in the rotation control device A, and the generated braking force is transmitted to the steering wheel C. The player can feel the vibration via the steering wheel C as in the case of driving an actual car, and can produce a more realistic feeling.

FIG. 6 shows a fourth embodiment in which a rotation brake is formed by using a rotation control device A in a transfer device using a free roller. In the figure, 12 is a free roller, 13 is a joint, H is a controller power supply unit, I is a central control unit, and J is a transferred object.

First, when the transferred object J is transferred on the plurality of rows of free rollers 12,..., And reaches the position shown in FIG.
The rotation control device A, which is connected by the function of a rotation brake, acts as a rotation brake.

That is, initially, the transferred object J is detected by the sensor I '.
Detects and sends a detection signal to the central control device I, the central control device I
A current is applied from the controller power supply unit H to the motor to apply a load to the rotation, function as a low-torque rotation brake, and reduce the rotation of the free roller 12 to a low speed.

When the speed of the transferred object J further decreases and the value of the speed of the transferred object J becomes equal to or less than a predetermined value, the centralized control device I sends the rotation control device A of the free roller 12 on which the transferred object J is mounted to the rotation control device A. A current is applied from the controller power supply unit H to function as a rotary brake, and the transferred object J is completely stopped.

As described above, the present invention has been described based on the embodiments. However, the present invention is not limited to the above-described embodiments, and may be implemented in any manner unless the structure described in the claims is changed. it can. For example, when a larger braking force is desired to be obtained, the torque is transmitted to the rotation control device of the present invention through a pair of gears having different gear ratios, thereby increasing the braking force with a small increase in cost. Can be obtained.

[0036]

As described above, in the rotation control device according to the present invention, a strong braking force can be obtained in the rotation direction while being small in size and low in cost, and the applied current is either DC or pulse current. In addition, since the braking force can be arbitrarily changed depending on the applied current value, a great effect is exhibited such that the braking force can be used in various applications such as a rotary damper device and a rotary brake device.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part of a rotation control device according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a main part including a line PP in FIG. 1;

FIG. 3 is a configuration diagram showing a first embodiment of a rotation control device of the present invention.

FIG. 4 is a configuration diagram showing a second embodiment of the rotation control device of the present invention.

FIG. 5 is a block diagram showing a third embodiment of the rotation control device of the present invention.

FIGS. 6A and 6B are configuration diagrams showing a fourth embodiment of the rotation control device of the present invention, wherein FIG. 6A is a side view of one unit, and FIG. FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shaft 1 'Bearing part 2 Rotor 3 Locking piece 4 Movable piece 5 Magnetic fluid 6 Coil 6a Yoke 7 Gap member 8, 8a, 8b Housing part 9 Door 10 Entrance 11 Opening / closing door 11a Lock device 12 Free roller 13 Joint A rotation Control device B Rotary encoder C Handle D Handle load control device E Central control device F Image generation device G Display H Controller power supply unit I Control unit I 'Sensor J Transfer

Claims (8)

[Claims] A plurality of locking pieces made of a non-magnetic member fixed to a rotating shaft and radially disposed, and a ferromagnetic material disposed between the locking pieces. A rotation control device comprising: a plurality of movable pieces each formed of a member; and a field coil portion provided on an outer periphery of the movable piece and including a field coil wound substantially concentrically with the rotation axis. By energizing the field coil, the movable piece is attracted to the inner peripheral surface of the field coil portion, and the rotating shaft is provided with a braking force in the rotating direction by frictional resistance generated on the attracted surface. Characteristic rotation control device. 2. The rotation control device according to claim 1, wherein the locking piece is fixed to a cylindrical rotor portion that is concentric with the rotation shaft. 3. The rotation control device according to claim 1, wherein a lubricant is filled between the locking piece, the movable piece, and the field coil portion. 4. The rotation control device according to claim 1, wherein the lubricant is a magnetic fluid. 5. The system according to claim 1, wherein a braking force in a rotating direction of the rotating shaft is made variable by changing a current value applied to the field coil. Rotation control device. 6. The system according to claim 1, wherein a value of a current supplied to said field coil is varied so that a braking force in a direction of rotation of said rotary shaft functions as a rotary damper.
A rotation control device according to any one of claims 1 to 5. 7. The method according to claim 1, wherein a braking force in a rotating direction of the rotating shaft is caused to function as a rotating brake by maximizing a current value applied to the field coil. The rotation control device as described in the above. 8. A structure in which a current is intermittently applied to the field coil to apply a vibration element in a rotational direction to a braking force in a rotational direction of the rotating shaft. 7. The rotation control device according to any one of 1 to 6.