JPH0823663A - Generator - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a generator that can easily start by reducing the rotating torque of the rotor required at the time of starting. [Structure] By rotating the drive shaft 6 in one direction, the drive shaft 6
The male screw 6a and the female screw 7a of the support plate 7 are screwed together so that the male screw 6a of the drive shaft 6 and the female screw 7a of the support plate 7 are disengaged by rotation of the drive shaft 6 in the other direction. It has become. Then, the handle 9 is rotated so that the drive shaft 6 rotates in the direction in which the male screw 6a of the drive shaft 6 and the female screw 7a of the support plate 7 are screwed together, and the rotor 2 is held at a position away from the stator 1. In this case, the magnetic attraction between the rotor 2 and the stator 1 is reduced, and in this state the drive shaft 6
If the handle 9 is rotated and started so that the drive shaft 6 rotates in the direction in which the male screw 6a and the female screw 7a of the support plate 7 are disengaged, the rotational torque of the rotor 2 required at the start is reduced. It has become so.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a generator in which a stator and a rotor face each other in parallel to the axial direction of the rotor.

[0002]

2. Description of the Related Art In a generator of this type, a stator and a rotor are opposed to each other at a constant interval, a plurality of permanent magnets are fixed to one of them at equal intervals around the axis of the rotor, and another permanent magnet is fixed to the other. A plurality of iron cores are formed at equal intervals around the axis of the rotor so as to face each other, and a coil is wound. When the rotor is rotated, the rotational energy of the rotor is converted into electrical energy through the coil due to the relative movement between the magnetic flux of the permanent magnet and the iron core.

By the way, between the rotor and the stator,
The permanent magnet and the iron core work to exert a magnetic attraction force to the rotor's rotation resistance.However, since an inertial force is added to the rotor as the rotor rotates during power generation, the rotor receives such a large rotational torque. The rotor can be rotated without it.

[0004]

However, since no inertial force is applied to the rotor at the time of starting, the rotational resistance of the rotor becomes larger than that at the time of power generation, and unless a large rotational torque is applied to the rotor, the rotor cannot be rotated. I can't rotate,
It was difficult to start.

An object of the present invention is to obtain a generator that can be easily started by reducing the rotating torque of the rotor required at the time of starting.

[0006]

SUMMARY OF THE INVENTION The present invention is a generator in which a stator and a rotor are opposed to each other in parallel to the axial direction of the rotor, and the rotor is rotatably supported by a supporting member. And a rotor holding mechanism that can selectively hold the rotor at a separated position away from the stator relative to the power generation position, and that displaces the rotor to the power generation position by the rotation operation from the separated position. There is.

As the rotor holding mechanism, for example, by rotating the drive shaft of the rotor in one direction, the rotor is screwed into the drive shaft to hold the rotor in the separated position, and from the separated position to the other direction of the drive shaft of the rotor. Rotation causes the screw to be disengaged from the rotor drive shaft and displaces the rotor to the power generation position, and the rotor drive shaft is urged in the axial direction to disengage the screw from the rotor drive shaft. And a biasing means for holding the rotor at the power generation position when the rotor rotates, or holds the rotor at the power generation position by engaging with the drive shaft of the rotor and rotates with the drive shaft of the rotor when the rotor rotates. The hollow rotating wheel that allows the rotor drive shaft to move in the axial direction in the direction in which the rotor displaces to the separated position, and the rotor that engages with the rotor drive shaft inside the rotating wheel to move the rotor through the rotating wheel. When held in the separated position It is also possible to use a ball having a sphere that displaces the rotor to the power generation position by disengaging the rotor from the drive shaft by centrifugal force when the rotational speed of the rotary wheel reaches a predetermined speed from the separated position. .

[0008]

According to the present invention, when the rotor holding mechanism holds the rotor in the separated position, the rotor separates from the stator and the magnetic attraction force between the rotor and the stator is reduced. However, the rotational torque of the rotor required at the time of starting is reduced, and the rotor can be rotated without applying a large rotational torque to the rotor.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A generator to which the present invention is applied will be described below with reference to the drawings. In this generator, as shown in FIG. 1, a stator 1 and a rotor 2 face each other in parallel to the axial direction of the rotor 2, and a plurality of permanent magnets 3 are fixed to the rotor 2 at equal intervals around the axial line of the rotor 2. A plurality of iron cores 4 facing the respective permanent magnets 3 are formed on the stator 1 at equal intervals around the axis of the rotor 2, and the coils 5 are wound around the stator 1. When the rotor 2 is rotated, the rotational energy of the rotor 2 is converted into electrical energy through the coil 5 due to the relative movement of the magnetic flux of the permanent magnet 3 and the iron core 4.

The stator 1 is fixed to a base (not shown) below the rotor 2, each iron core 4 is formed in a projecting manner at the upper part, and a coil 5 is wound around the connecting portion of each iron core 4.

The rotor 2 is located above the stator 1, and each permanent magnet 3 is attached to the lower surface of the rotor 2. Rotor 2
A drive shaft 6 extending upward is coaxially fixed to the shaft center portion of the shaft, and is rotatably supported by a support plate 7 as a support member located above the rotor 2 via the drive shaft 6. Has been done.

The drive shaft 6 penetrates the support plate 7 slidably in the axial direction and projects upward, and a disc-shaped rotating wheel 8 is coaxially fixed to the tip thereof. A handle 9 is fixedly mounted on the upper surface of the rotating wheel 8 at a position away from the axis of the rotating wheel 8. When the rotating wheel 8 is rotated by gripping the handle 9 during power generation, the rotor 9 is rotated through the drive shaft 6 to rotate the rotor. Rotational force is transmitted to the rotor 2 to rotate the rotor 2.

The support plate 7 is fixed to a base (not shown), and a compression coil spring 10 as an urging means is interposed between the support plate 7 and the rotary wheel 8, and the spring force of the compression coil spring 10 causes the rotary wheel 8 to intervene. As a result, the drive shaft 6 is prevented from falling and the rotor 2 is held at the position shown in FIG. 1, and the rotor 2 rotates at this position during power generation.

A large diameter portion is formed in the lower portion of the through hole of the drive shaft 6 in the support plate 7, and a female screw 7a constituting a rotor holding mechanism is driven by the compression coil spring 10 on the inner circumference of the large diameter portion. The internal thread 7a and the compression coil spring 10 are formed so as to be screwed with the shaft 6, and selectively rotate the rotor 2 between a power generation position in FIG. 1 and a separation position in FIG. 2 separated from the stator 1 from the power generation position. The rotor 2 can be held, and the rotor 2 is displaced from the separated position in FIG. 2 to the power generation position in FIG. 1 by its rotating operation.

That is, a large diameter portion is partially formed near the connecting portion of the drive shaft 6 with the rotor 2 and a screw 6a is formed on the outer periphery of the large diameter portion, so that the drive shaft 6 rotates in one direction. The male screw 6a of the drive shaft 6 and the female screw 7 of the support plate 7.
When the drive shaft 6 is rotated in the other direction, the male screw 6a of the drive shaft 6 and the female screw 7a of the support plate 7 are disengaged from each other. When the male screw 6a of the drive shaft 6 and the female screw 7a of the support plate 7 are disengaged from each other, the drive shaft 6 is driven by the spring force of the compression coil spring 10.
The upper end of the male screw 6a is pressed against the lower end of the female screw 7a of the support plate 7 to hold the rotor 2 at the power generation position in FIG.
When the male screw 6a of the drive shaft 6 and the female screw 7a of the support plate 7 are screwed together, the rotor 2 is attached to the rotor 2 as shown in FIG.
It is designed to be held in the separated position. Further, when the rotor 2 is held in the separated position in FIG. 2, when the drive shaft 6 is rotated in a direction in which the male screw 6a of the drive shaft 6 and the female screw 7a of the support plate 7 are disengaged from each other, the drive shaft 6 is rotated. As the rotor 6 rotates, the rotor 2 descends while rotating, and after a predetermined rotation of the drive shaft 6, the male screw 6a of the drive shaft 6 and the female screw 7a of the support plate 7 are disengaged from each other and the rotor 2 is rotated as shown in FIG. After being displaced to the power generation position, the upper end of the male screw 6a of the drive shaft 6 is moved to the female screw 7 of the support plate 7 by the spring force of the compression coil spring 10.
1, the rotor 2 is rotated while being held in the power generation position in FIG. 1, and the rotor 2 is held in the power generation position in FIG. 1 from the state where the rotor 2 is held in the power generation position in FIG.
When the drive shaft 6 is rotated in the direction in which the female screw 7a is screwed, the male screw 6a of the drive shaft 6 and the female screw 7 of the support plate 7 are rotated.
With a, the rotor 2 is rotated and raised as the drive shaft 6 rotates, and is displaced to the separated position in FIG.

According to the above construction, the male screw 6 of the drive shaft 6 is formed.
The handle 9 is rotated so that the drive shaft 6 rotates in the direction in which a and the female screw 7a of the support plate 7 are screwed together.
2 in the separated position shown in FIG.
And the magnetic attraction force between the rotor 2 and the stator 1 decreases, and in this state, the drive shaft 6 moves in the direction in which the external screw 6a of the drive shaft 6 and the internal screw 7a of the support plate 7 are disengaged. If the handle 9 is rotated so as to start, the rotation torque of the rotor 2 required at the time of start is reduced, and the rotor 2 is rotated.
Moreover, the rotor 2 can be rotated without applying such a large rotational torque, and can be easily started.

After the start, the rotor 2 rotates and descends as the drive shaft 6 rotates, and after the drive shaft 6 has rotated a predetermined amount, the male screw 6a of the drive shaft 6 and the female screw 7a of the support plate 7 are rotated.
, And the rotor 2 is displaced to the power generation position in FIG.
After that, the drive shaft 6 is driven by the spring force of the compression coil spring 10.
The upper end of the male screw 6a is pressed by the lower end of the female screw 7a of the support plate 7, and the rotor 2 rotates while being held at the power generation position in FIG. 1, and the relative movement between the magnetic flux of the permanent magnet 3 and the iron core 4 at this time. Thus, the rotational energy of the rotor 2 is converted into electric energy through the coil 5. At the time of this power generation, the rotor 2 approaches the stator 1 and the magnetic attraction force between the rotor 2 and the stator 1 increases as compared with at the time of starting, but at this time, inertial force is added to the rotor 2, so the rotor 2 Two
In addition, the rotor 2 can be rotated without applying such a large torque.

Next, a second embodiment of the present invention will be described with reference to FIGS. 3 and 4. In this embodiment, a counterbore hole 11 is formed on the upper surface of the support plate 7, and a hollow rotary wheel 12 is rotatably inserted in the counterbore hole 11, and the drive shaft 6 is inserted through the rotary wheel 12. It is rotatably supported by the support plate 7. The drive shaft 6 has a rectangular cross-section and is inserted into the rotary wheel 12 so as to be rotatable with the rotary wheel 12 and axially movable. A knob 6b is formed at the upper end of the drive shaft 6 so as to be able to be pulled upward.

The rotating wheel 12 engages with the intermediate portion of the drive shaft 6 to hold the rotor 2 at the position shown in FIG. 3, and the rotor 2 rotates at this position during power generation. That is, a flange portion 6c that abuts the bottom wall of the rotary wheel 12 inside the rotary wheel 12 is formed in the intermediate portion of the drive shaft 6, and the flange portion 6c prevents the drive shaft 6 from falling and the rotor 2 It is held in the position shown in FIG. Also, the rotating wheel 1
On the upper surface of 2, the handle 13
Is fixed, and when the rotating wheel 12 is rotated by gripping the handle 13 during power generation, the rotating force is transmitted from the rotating wheel 12 to the rotor 2 via the drive shaft 6, and the rotor 2 is rotated.

Inside the rotary wheel 12, a plurality of balls 14 constituting a rotor holding mechanism together with the rotary wheel 12 are rotatably inserted, and the rotor 2 is illustrated by these balls 14 and the rotary wheel 12. 3 shows the power generation position and the stator 1 from the power generation position.
It can be selectively held at both the separated position and the separated position shown in FIG. That is, the ball 14 can be engaged and disengaged between the collar portion 6c and the bottom wall of the rotary wheel 12. Then, in a state in which the ball 14 is separated from between the collar portion 6c and the bottom wall of the rotary wheel 12, the collar portion 6c contacts the bottom wall of the rotary wheel 12 and the rotor 2 is held at the power generation position in FIG.
When the sphere 14 is engaged between the flange portion 15 and the bottom wall of the rotary wheel 12, the sphere 14 is interposed between the flange portion 6c and the bottom wall of the rotary wheel 12 so that the rotor 2 moves away from the rotor 2 in FIG. It is designed to be held in position.

The ball 14 engages between the flange portion 6c and the bottom wall of the rotary wheel 12 when the drive shaft 6 is pulled up in the axial direction, and the rotational speed of the rotary wheel 12 is predetermined from this engaged state. When the speed is reached, the flange portion 6c and the bottom wall of the rotary wheel 12 are separated from each other. That is, the rotating wheel 12
The bottom wall of the shaft has a downward slope toward its axis, and when the drive shaft 6 is pulled up in the axial direction, the ball 14 becomes
The ball 14 is adapted to roll toward the axial center portion of the bottom wall 2 and engage the sphere 14 between the collar portion 6c and the bottom wall of the rotary wheel 12. From the state in which the ball 14 is engaged between the flange portion 6c and the bottom wall of the rotary wheel 12, when the rotational speed of the rotary wheel 12 reaches a predetermined speed, the ball 14 rolls due to the centrifugal force. It is adapted to be detached from between the collar portion 6c and the bottom wall of the rotary wheel 12.

According to this embodiment, by pulling up the drive shaft 6 in its axial direction, the sphere 14 is engaged between the flange portion 6c and the bottom wall of the rotary wheel 12, and the rotor 2 is separated from the rotor 2 in FIG. If the rotor 2 is held in the position, the rotor 2 separates from the stator 1 and the magnetic attraction force between the rotor 2 and the stator 1 is reduced. The rotation torque is reduced, and the rotor 2 can be rotated without applying such a large rotation torque to the rotor 2, thus facilitating the starting.

After the start, the rotary wheel 12 rotates together with the drive shaft 6 as the drive shaft 6 rotates. When the rotational speed of the rotary wheel 12 reaches a predetermined speed, the centrifugal force causes the balls 14 to roll. It moves and separates from between the collar portion 6c and the bottom wall of the rotary wheel 12,
By this separation, the collar portion 6c abuts on the bottom wall of the rotary wheel 12, and the rotor 2 rotates while being held at the power generation position shown in FIG. 3, and the magnetic flux of the permanent magnet 3 and the iron core 4 move at this time. Rotational energy of the rotor 2 is converted into electric energy through the coil 5. At the time of this power generation, the rotor 2 approaches the stator 1 and the magnetic attraction force between the rotor 2 and the stator 1 increases as compared with at the time of starting, but at this time, inertial force is added to the rotor 2, so the rotor 2 It is possible to rotate the rotor 2 without applying such a large rotational torque to the rotor 2.

In the above embodiment, the stator 1 is provided with the iron core 4 and the rotor 2 is provided with the permanent magnet 3. However, the present invention is not limited to this, and the stator 1 is provided with the permanent magnet 3 and the rotor 2 is provided with the iron core 4. You may do it.

[0025]

As described above, in the generator according to the present invention, the support member that rotatably supports the rotor selectively selects the rotor at the power generation position and at the separated position where the rotor is separated from the stator. A rotor holding mechanism that can hold the rotor and that displaces the rotor from the separated position to the power generation position by its rotational operation is provided. Have an effect.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a generator to which the present invention is applied.

FIG. 2 is a cross-sectional view of essential parts showing a state at the time of starting.

FIG. 3 is a cross-sectional view of essential parts showing a second embodiment.

FIG. 4 is a cross-sectional view of an essential part showing a state at the time of starting in the second embodiment.

[Explanation of symbols]

 1 stator 2 rotor 7 support plate (support member) 7a female screw (rotor holding mechanism) 10 compression coil spring (rotor holding mechanism) 12 rotating wheel (rotor holding mechanism) 14 ball (rotor holding mechanism)

Claims (3)

[Claims] 1. A generator in which a stator and a rotor oppose each other in parallel to the axial direction of the rotor, and a support member that rotatably supports the rotor includes a rotor at a power generation position and a power generation position at a position higher than the power generation position. A rotor holding mechanism that can selectively hold the rotor at a separated position away from the stator, and that displaces the rotor to the power generation position by the rotational operation from the separated position. Machine. 2. The rotor holding mechanism according to claim 1, wherein the rotor holding mechanism holds the rotor at the separated position by being screwed with the drive shaft by rotating the rotor in one direction. Is a female screw that displaces the rotor to the power generating position by being unscrewed from the drive shaft by rotating the drive shaft in the other direction, and the drive shaft that biases the drive shaft in the axial direction. And a biasing means for holding the rotor at the power generation position when the screw is disengaged from the female screw. 3. The rotor holding mechanism according to claim 1, wherein the rotor holding mechanism engages with a drive shaft of the rotor to hold the rotor in the power generation position, and rotates together with the drive shaft when the rotor rotates. A hollow rotating wheel that allows the rotor to move in the axial direction in the direction in which the rotor is displaced to the separated position, and the hollow rotating wheel that engages with the driving shaft inside the rotating wheel and is rotated through the rotating wheel. The rotor is held in the separated position, and when the rotational speed of the rotary wheel reaches a predetermined speed, the rotor disengages from the drive shaft by centrifugal force and displaces the rotor to the power generation position. A generator having a sphere.