JPH11122895A - Motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor, wherein a rotating body is repeatedly rotated in one direction or in the other direction through interaction between electromagnetic force and spring force, and outputting the repeated rotation of the rotating body as unidirectional rotation through a one-way clutch. SOLUTION: A rotor section 60 comprising permanent magnets is supported on the inner end section of a cylindrical output shaft 40, which is coaxially supported on a support shaft 30 extending from the central portion of a stator S so that the rotor section is freely rotatable. The rotor section 60 receives the reaction of electromagnetic force exerted between a current passed through the armature winding of the stator S and magnetic poles, and rotates in one direction against a coil spring 70a. When the inflow of the current into the armature winding is stopped, the rotor section 60 receives the action of the coil spring 70a and rotates in the other direction. A one-way clutch 80 is coaxially supported on the output shaft 40 and transmits the rotation of the rotor section 60 in one direction or in the other direction with respect to the output shaft 40, so as to maintain the rotation of the output shaft 40 in the one and the same direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor for use as a blower of an air conditioner for vehicles and general buildings, as well as a drive source for operating devices of vehicles, ships and aircraft, or various industrial devices.

[0002]

2. Description of the Related Art Conventionally, for example, a DC motor has been used as a drive source of a blower of a vehicle air conditioner. This DC motor has lower cost and better controllability than other motors.
However, a DC motor uses a brush as an essential component. Therefore, when the DC motor rotates, the brush generates abnormal noise and sparks due to contact with the commutator. In addition, the life of the brush is shortened because the brush is worn by contact with the commutator.

For this reason, in recent years, as a drive source of a blower,
There is a tendency to use brushless DC motors.

[0004]

In the brushless DC motor, the mechanical rectification mechanism is made electronic by replacing the brush with a semiconductor switching element. Therefore, not only electrical noise and mechanical noise are reduced but also the life is extended. Therefore, maintenance and inspection of the brushless DC motor are almost unnecessary.

However, in this brushless DC motor,
A complicated semiconductor circuit is required to digitize the mechanical rectification mechanism. Therefore, the brushless DC motor has a disadvantage that the cost is higher than that of a normal DC motor. For example, in the case of a generally used three-phase brushless DC motor, the semiconductor circuit requires two (six in total) semiconductor switching elements per phase. The semiconductor switching element accounts for a large proportion of the entire manufacturing cost of the brushless DC motor.

Further, in controlling the brushless DC motor by the semiconductor circuit, it is necessary to change the phase of the current in accordance with the rotational position of the rotor of the brushless DC motor. Therefore, a position detecting circuit for detecting the rotational position of the rotor is also required. Needed. For this reason, the brushless DC motor has a disadvantage that the cost is further increased. Therefore, in order to realize cost reduction as a drive source for the blower, an electric motor having a configuration in which the number of semiconductor switching elements is required to be as small as possible is desired.

Therefore, in order to cope with the above, the present invention repeatedly rotates the rotating body in one direction or the other direction by the interaction between the electromagnetic force and the spring force. It is an object of the present invention to provide an electric motor that outputs one-way rotation by a one-way clutch.

[0008]

According to the present invention, an armature plate is fixed to a stationary member and located coaxially with an output shaft. The spring means is fixed to the stationary member. The permanent magnet is located coaxially with the armature plate and has a plurality of magnetic poles along the circumferential direction. The permanent magnet is configured to generate an electromagnetic force between the current flowing through the armature winding of the armature plate and each magnetic pole. And rotates in one direction against the spring means, and rotates in the other direction due to the action of the spring means when the current stops flowing into the armature winding.

[0009] The one-way clutch is provided coaxially with the output shaft to rotate the permanent magnet in one direction or the other direction.
The output is transmitted to the output shaft so as to maintain the rotation in the fixed direction. In this way, the permanent magnet is alternately rotated in one direction and the other direction repeatedly using the electromagnetic force and the spring force of the spring means alternately, and the one-way clutch allows the permanent magnet to rotate in one direction or the other direction. By transmitting the rotation to the output shaft so as to maintain the rotation of the output shaft in a fixed direction, without using a rotation position detection device, and greatly reducing the number of semiconductor switching elements as driving means, The cost of the motor can be significantly reduced.

According to the second aspect of the present invention, the permanent magnet is fixed to the stationary member, is positioned coaxially with the output shaft, and has a plurality of magnetic poles along the circumferential direction. The spring means is fixed to the stationary member. The armature plate is positioned coaxially with the permanent magnet, and the armature plate receives a reaction of the electromagnetic force between the current flowing into the armature winding and each magnetic pole to resist the spring means. It rotates in one direction and rotates in the other direction under the action of the spring means when the inflow current stops.

The one-way clutch is provided coaxially with the output shaft, and transmits the rotation of the armature plate in one direction or the other direction to the output shaft so as to maintain the rotation of the output shaft in one direction. . Thus, even if the roles of the armature plate and the permanent magnet are reversed from those of the invention described in claim 1 above,
The same operation and effect as the first aspect can be achieved.

According to the third aspect of the present invention, the rotor includes an output shaft and a rotor portion provided coaxially with the output shaft and comprising a permanent magnet having a plurality of magnetic poles. Having. The stator includes a longitudinal magnetic body having both opposing portions facing each other via the outer peripheral surface of the rotor section, and a coil wound around an intermediate portion of the magnetic body, and when no current flows through the coil, Each opposing portion attracts each magnetic pole of the rotor portion facing them and rotates this rotor portion in one direction, and according to the inflow of current to the coil, each opposing portion causes each magnetic pole of the rotor portion opposing them to flow. The rotor is repelled and rotates in the other direction.

The one-way clutch is provided coaxially with the output shaft and transmits the rotation of the rotor unit in one direction or the other direction to the output shaft so as to maintain the rotation of the output shaft in one direction. This allows the rotor to rotate smoothly by transmitting the rotation from the one-way clutch to the output shaft. As a result, the same operation and effect as those of the first or second aspect can be achieved without using the spring means in the invention of the first or second aspect.

According to the fourth aspect of the present invention, the armature plate is located coaxially with the output shaft. The permanent magnet is fixed to a stationary member and has a plurality of magnetic poles positioned coaxially with the armature winding of the armature plate. The armature plate is rotated in one direction by the electromagnetic force therebetween. The torsion coil spring is provided coaxially with the output shaft, and rotates the armature plate in the other direction when current to the armature winding is stopped.

The one-way clutch is provided coaxially with the output shaft and transmits the rotation of the armature plate in one direction or the other direction to the output shaft so as to maintain the output shaft in a constant direction. I do. Thus, the same function and effect as the first aspect can be achieved. According to the fifth aspect of the invention, the roles of the armature plate and the permanent magnet are opposite to those of the fourth aspect of the invention. The same operation and effect as the invention can be achieved.

According to the invention described in claim 6, the first and second armature plates are housed in a housing,
It is located coaxially with the output shaft between its axially opposite sides. The first and second torsion coil springs are interposed between one of the axially opposite side portions and the first armature plate and between the second armature plate and the other of the axially opposite side portions, respectively. The first and second torsion coil springs are wound in opposite directions.

The permanent magnet has a plurality of magnetic poles fixed in the housing between the first and second armature plates so as to be located coaxially with the first and second armature plates. The first armature plate rotates in one direction against the first and second torsion coil springs due to the electromagnetic force between the current flowing through each armature winding of the second armature plate and each magnetic pole, and 2. Rotate the armature plate in the other direction.

When the first and second torsion coil springs stop flowing current to each armature winding, the first and second torsion coil springs move.
Are rotated in the directions opposite to the respective rotation directions. The first and second one-way clutches are provided coaxially with the output shaft and rotate the first armature plate in one direction or the other direction and rotate the second armature plate in the other direction or the one direction. Each is transmitted to the output shaft to maintain the output shaft rotating in a certain direction.

As described above, unlike the first embodiment, even if the first and second armature plates and the first and second torsion coil springs are employed, the first and second torsion coil springs can be used. A similar effect can be achieved. According to the seventh aspect of the invention, the roles of the first and second armature plates and the first and second permanent magnets are opposite to those of the fourth aspect. However, this also achieves the same operation and effect as the invention described in claim 6.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) FIG. 1 shows an example in which the present invention is applied to a blower B of a vehicle air conditioner. This blower B
It is installed inside the air duct of the air conditioner,
The blower B includes a blower fan F and an electric motor (hereinafter, referred to as a blower motor M).

The blower fan F is driven by a blower motor M to introduce air into the air duct and blow air into the vehicle compartment. The blower motor M includes a housing 10 made of a magnetic material, and the housing 10 is fixed at an appropriate position in an upstream portion of the air duct. Also,
The blower motor M includes a stator S. The stator S includes a plate-shaped stator portion 20 and a support shaft 30.

As shown in FIG.
The stator unit 20 is coaxially mounted on the rear wall 11 in the housing 10, and the stator unit 20 includes four coils 2 concentratedly wound in a substantially fan shape in a disk 21 made of an insulating resin material.
2 to 25 are molded so as to be embedded as shown in FIGS. Here, as shown in FIG. 2, each of the coils 22 to 25 is
The coils 22 to 25 are symmetrically located in the disk 21 around the center 1a, and are sequentially connected in series from the coil 22 to the coil 25.

When a voltage is applied between the input terminal a of the coil 22 and the input terminal b of the coil 25, a current flows through each of the coils 22 to 25. However, when the input terminal a corresponds to the positive side of the applied voltage and the input terminal b corresponds to the negative side of the applied voltage, the current flowing through each of the coils 22 to 25 is indicated by a solid line arrow in FIG. Turn in the direction shown. When the input terminal a corresponds to the negative side of the applied voltage and the input terminal b corresponds to the positive side of the applied voltage, each coil 2
The current flowing through 2 to 25 is directed in the direction opposite to the direction indicated by the solid arrow in FIG.

The support shaft 30 has a base 2
1 through the center hole 21a and the rear wall 11 of the housing 10.
The support shaft 30 has a tip 32
, Coaxially extends through the opening 12a of the front wall 12 of the housing 10. Further, the blower motor M has a rotor R, and the rotor R has a cylindrical output shaft 40.
, A pair of bearings 50 a and 50 b, and a rotor unit 60.

The output shaft 40 is supported at both ends 41 and 42 by the support shaft 3 via both ball bearings 50a and 50b.
0 and rotatably supported. here,
Each end 41, 42 of the output shaft 40 is press-fitted into each outer ring of both ball bearings 50a, 50b, and each inner ring of both ball bearings 50a, 50b is connected to the support shaft 30 by respective stop rings 41a, 42a. It is retained in the axial direction.

The rotor section 60 is formed by magnetizing a disk-shaped permanent magnet so as to have four magnetic poles 60a to 60d. It is press-fitted from outside to the end 41 of the shaft 40 coaxially. Here, the magnetic poles 60a to 60d are formed at equal angular intervals along the circumferential direction of the rotor portion 60, and these magnetic poles 60a to 60d are formed in the plate thickness direction (axial direction of the output shaft 40). It is magnetized. However, both magnetic poles adjacent to each other among the magnetic poles 60a to 60d are magnetized to have mutually opposite polarities. For example, the magnetic pole 60a is
In FIG. 2, the right side surface has an N pole and the left side surface has an S pole. The magnetic pole 60d has an S pole on the right side surface in FIG. 2 and an N pole on the left side surface in FIG.

For example, when the stator portion 20 is at the angular position shown in FIG. 2 with respect to the rotor portion 60, the magnetic flux generated from the magnetic pole 60c in the direction of arrow B shown in FIG.
It intersects at right angles with the coil side 22a of the coil 22 and the coil side 25a of the coil 25 located adjacent to the coil side 22a. Therefore, the electromagnetic force is applied to both coil sides 22.
The current flowing in the direction indicated by the arrow in FIG. 2 is generated in the direction of one tangent P according to Fleming's left-hand rule.

This is because the magnetic pole 60b has an arrow B
The same applies to the magnetic flux generated in the direction, the coil side 23a of the coil 23, and the coil side 24a of the coil 24 located adjacent to the coil side 23a. Note that the direction of the electromagnetic force at this time is opposite to the direction of one tangent P. The magnetic flux generated from the magnetic pole 60a in the direction opposite to the direction of arrow B is
It intersects at right angles with the coil side 22b of the coil 22 and the coil side 23b of the coil 23 located adjacent to the coil side 22b. Therefore, the electromagnetic force is applied to both coil sides 22.
The current flowing in the direction of the arrow indicated by the solid line in FIG. 2 is generated in the direction of one tangent Q according to Fleming's left-hand rule.

Such a phenomenon is caused by the arrow B from the magnetic pole 60c.
The same applies to the magnetic flux generated in the direction opposite to the direction, the coil side 25b of the coil 25, and the coil side 24b of the coil 24 located adjacent to the coil side 25b. The direction of the electromagnetic force at this time is opposite to the direction of one tangent Q. In other words, since the stator portion 20 is fixed to the housing 10, a reaction to each of the above electromagnetic forces acts on the rotor portion 60, and a torque is applied to the rotor portion 60 in a direction opposite to the above electromagnetic forces. Occurs. This means
This means that the rotor unit 60 rotates in the direction of arrow A shown in FIG. 2 (hereinafter, forward direction). Each magnetic pole of the rotor unit 60 forms a magnetic circuit together with the housing 10.

As shown in FIGS. 1 and 2, the blower motor M includes a pair of coil springs 70a and 70b. , Which are respectively engaged with pins 62a and 62b extending in opposite directions along the radial direction. The other end of each of the coil springs 70a, 70b is connected to each of the projections 13 protruding from the inner surface of the annular peripheral wall 13 of the housing 10 toward the vicinity of each of the pins 62a, 62b.
a and 13b respectively.

Here, the pin 62a extends from the center in the circumferential direction of the outer peripheral edge of the magnetic pole 60a.
Extends from the center in the circumferential direction of the outer peripheral edge of the magnetic pole 60c. The protrusion 13a is located on the right side in the circumferential direction of the rotor unit 60 in FIG. 2 with respect to the pin 62a, and the protrusion 12b is located on the circumferential side of the rotor unit 60 in FIG. 2 with respect to the pin 62b. It is located on the left side in the direction.

As a result, the coil spring 70a is
The coil spring 70b is maintained along the circumferential direction of the rotor unit 60 between the pin 62b and the protrusion 13b, and is maintained between the pin 2b and the protrusion 13b. When the circumferential center of the magnetic pole 60d of the rotor section 60 faces between the adjacent coil sides 22a and 25a of the coils 22 and 25 of the stator section 20, as shown in FIG. If the rotation angle θ is set to the initial angle θ = 0 degrees, the coil springs 70a, 7
0b are both natural lengths. Therefore, the spring force of each of the coil springs 70a and 70b is zero.

The rotation angle θ is +45 degrees (see FIG. 2).
In this case, it means that the rotor unit 60 has rotated 45 degrees downward from the initial angle θ = 0 in FIG. On the other hand, when the rotation angle θ is −45 degrees (see FIG. 2), it means that the rotor unit 60 has rotated 45 degrees upward from the initial angle θ = 0 in FIG.

Here, the rotation angle θ is +45 degrees or -4.
At 5 degrees, the spring force of each coil spring 70a, 70b is
The absolute value is set to be smaller than the electromagnetic force (see FIG. 5). Thereby, the rotor unit 6
0 can rotate against the spring force of each coil spring 70a, 70b. Further, the rotor R has a one-way clutch 80, which is coaxially fitted to the output shaft 40 from the outside thereof. As shown in FIGS. 3A to 3C, the one-way clutch 80 includes a cylindrical member 81, a plurality of coil springs 82, and the same number of steel balls 83 as the coil springs 82.

The cylindrical member 81 has a plurality of partition walls 81a. Each of the partition walls 81a protrudes radially from the inner peripheral wall of the cylindrical member 81 toward the outer peripheral wall of the output shaft 40 at equal angular intervals. I have. Here, the distal end surface of each partition 81a faces the outer peripheral wall of the output shaft 40 with a gap. Each of the partition walls 81a that are adjacent to each other among the plurality of partition walls 81a, together with the inner peripheral wall of the cylindrical member 81, forms a housing chamber 81b.
Accommodates a pair of coil springs 82 and steel balls 83, respectively.

Here, in each accommodation room 81b, a steel ball 83
Are urged by the coil spring 82 in the same circumferential direction in the extension direction (see FIG. 3). In the one-way clutch 80 configured as described above, in each of the accommodation chambers 81b, the steel ball 83 is brought into contact with the right side surface of the partition wall 81a in FIG. There is.

In such a state, the rotor portion 60, that is, the output shaft 40 receives the electromagnetic force from the stator portion 20 and the direction of the arrow shown in FIG.
When the steel ball 83 is rotated by a predetermined angle, the steel ball 83 is pressed against the outer peripheral surface of the output shaft 40 by the corner between the right side surface of the partition wall 81a and the inner peripheral wall of the cylindrical member 81 to be in a meshing state. Therefore, the cylindrical member 81 also rotates by the predetermined angle in the direction indicated by the arrow in FIG.

Accordingly, the one-way clutch 80 is
The rotational force of the output shaft 40 in the normal rotation direction during the predetermined angle is transmitted to the shaft hole f of the blower fan F against the coil springs 70a and 70b. The cylindrical member 81 is press-fitted coaxially into the shaft hole f of the blower fan F on the outer peripheral wall. When the torque applied to the rotor portion 60 stops after the output shaft 40 rotates by the predetermined angle, the rotor portion 60 is pulled by the contraction force of the two coil springs 70a and 70b, and is opposite to the forward rotation direction (reverse rotation direction). ), The steel ball 83 is dissociated from the right side surface of the partition wall 81a.
Therefore, the output shaft 40 idles while the cylindrical member 81 is stationary.

Next, a control circuit E for each of the coils 22 to 25
Will be described with reference to FIG. The control circuit E includes a switching transistor 90, a battery 100, and a pulse signal generation circuit 110. The switching transistor 90 has a coil 2 at its emitter.
2, and the collector of the switching transistor 90 is connected to the positive terminal of the battery 100. The negative terminal of the battery 100 is connected to the input terminal b of the coil 25.

The pulse signal generating circuit 110 generates a rectangular pulse signal at a predetermined frequency and outputs the pulse signal to the base of the switching transistor 90. Therefore, the switching transistor 90 turns on intermittently in response to each pulse signal from the pulse signal generation circuit 110, and applies the DC voltage of the battery 110 between the input terminals a and b. Here, the pulse width of the pulse signal from the pulse signal generation circuit 110 at the high level corresponds to the time required for the rotor section 60 to rotate from the rotation angle θ = 0 to +45 degrees (the predetermined angle). The pulse width of the pulse signal from the pulse signal generation circuit 110 at a low level is determined by the rotation angle θ = −45 degrees to −45 degrees.
It corresponds to the time required to return to θ = 0 degrees after rotating to degrees.

In the first embodiment configured as described above, it is assumed that the stator section 20 is at the angular position shown in FIG. At this time, the circumferential center of the magnetic pole 60d of the rotor section 60 is at θ = 0 degrees, and the one-way clutch 80 is in the state shown in FIG. In such a state, the pulse signal generation circuit 11
0 outputs one pulse signal to the switching transistor 90
, The switching transistor 90
It turns on during the high level of the pulse signal and turns off during the low level.

When the switching transistor 90 is turned on, the DC voltage of the battery 100 is applied between the input terminal a of the coil 22 of the stator unit 20 and the input terminal b of the coil 25. For this reason, the DC current of the battery 100 flows from the input terminal a to the input terminal b through the series circuit of the coils 22 to 25 along the directions indicated by the solid lines in FIG.

At this time, both magnetic poles 60b of the rotor section 60,
The magnetic flux flowing from 60d in the direction indicated by arrow B in FIG. 2 intersects at right angles with the coil sides 23a, 24a of both coils 23, 24 and the coil sides 22a, 25a of both coils 22, 25. Further, both magnetic poles 60a, 60c of the rotor section 60 are provided.
2, the magnetic flux flowing along the direction opposite to the direction of arrow B shown in FIG. 2 intersects the respective coil sides 22b and 23b of the coils 22 and 23 and the coil sides 25b and 24b of the coils 25 and 24 at right angles.

For this reason, the electromagnetic force according to Fleming's left-hand rule is applied to each of the coil sides 23a, 24a and each of the coil sides 22.
a, 25a, each of the coil sides 22b, 23b, and each of the coil sides 25b, 24b, and causes the rotor section 60 to generate torque in the normal rotation direction. Therefore, the rotor 6
0 is the high level of the one pulse signal together with the output shaft 40, that is, the rotation angle θ = 0 degrees to θ = + 45 degrees (in FIG. 2, each coil side 22a, 25a is replaced with each coil side 25b,
24b) and both coil springs 70a, 70b also extend.

Accordingly, the one-way clutch 80 transmits the rotational force of the output shaft 40 to the blower fan F in the engaged state shown in FIG. 3 (b). Rotate forward to +45 degrees. afterwards,
When the one pulse signal becomes low level, the switching transistor 90 is turned off, and the flow of DC current from the battery 100 to each of the coils 22 to 25 is stopped. Therefore, as described above, the electromagnetic force generated in each of the coils 22 to 25 disappears, and the torque for the rotor unit 60 also disappears.

Then, the rotor part 60 is moved to the two coil springs 70.
a, 70b pulls in the direction of contraction and starts to reverse. Accordingly, the one-way clutch 80 is moved to the position shown in FIG.
The output shaft 40 starts to reverse in the idling state because of the dissociation state indicated by. At this time, since the cylindrical member 81 is stationary, the transmission of torque from the output shaft 40 to the blower fan F is stopped.

After each of the coil springs 70a and 70b has a natural length, it is compressed and contracted by the pins 13a and 13b under the inertia of the rotor unit 60. This allows
The rotor unit 60 rotates reversely until θ = −45 degrees is reached. Thereafter, the rotor portion 60 receives the extension force of each of the coil springs 70a and 70b and rotates forward to θ = 0 degrees. At this time, the low-level period of the one-pulse signal ends.

Thereafter, every time a pulse signal from the pulse signal generating circuit 110 is output to the switching transistor 90, the rotor unit 60 transmits the pulse signal from the rotor unit 60 in the high level and low level periods of each pulse signal in the same manner as described above. Transmission of the rotational force to F and its stop are repeated. In other words, the transmission of the rotational force in the forward rotation direction from the rotor R to the blower fan F is performed by the one-way clutch 80 during the high-level period of each pulse signal sequentially output from the pulse signal generation circuit 110. During the low level period of each pulse signal, it is blocked by the one-way clutch 80. As a result, while the blower motor M rotates smoothly, only the rotational force in the forward direction is applied to the blower fan F.
Can be transmitted to

In this case, only one switching transistor 90 is required for the control circuit E, and the circuit for detecting the rotational position of the rotor R is not required, so that the cost of the motor can be greatly reduced. Further, since no brush is required, the life of the electric motor can be extended. (Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIGS.

In the second embodiment, the stator Sa and the rotor Ra are housed in the housing 10 described in the first embodiment in place of the stator S and the rotor R. In the second embodiment, the housing 10 is formed of a non-magnetic material unlike the first embodiment. The stator Sa is, as shown in FIGS.
A pair of stator pole plates 120 and 130 are provided, and these stator pole plates 120 and 130 are vertically fixed to the rear wall 11 of the housing 10 with a space therebetween.

The stator plate 120 has a stopper 121, which is
From the vertical intermediate portion of the inner wall 122 of the stator plate 13
0 protrudes toward the middle part in the vertical direction. The stator pole plate 130 has a stopper 131, and the stopper 131 protrudes from a vertically intermediate portion of the inner wall 132 of the stator pole plate 130 toward the tip of the stopper 121.

Further, the pole plate 140 is composed of the two stator pole plates 1.
20 and 130 are horizontally sandwiched between the lower ends thereof,
A coil 150 is wound around the pole plate 140. In addition, both stator pole plates 120 and 130 and pole plate 1
40 is made of a magnetic material. When a current is applied to the coil 150 in one direction, the magnetic flux generated by this current causes the pole plate 140, both stator pole plates 120, 1
30, and flows through the rotor part 150 of the rotor Ra and the other of the stator pole plates 120 and 130, which will be described later.
When the current flowing through the coil 150 is in the opposite direction, the magnetic flux generated by this current flows in the opposite direction.

The rotor Ra is composed of an output shaft 160, a rotor section 170, and the one-way clutch 80 described in the first embodiment. It is rotatably supported by a part of the rear wall 11, and is coaxially and rotatably supported in the axial hole f of the blower fan F at the axially intermediate portion through the one-way clutch 80.

The rotor section 170 is coaxially press-fitted into the output shaft 160 at a shaft hole 171 thereof. The rotor section 170 includes a disk-shaped permanent magnet and two semi-disk-shaped magnetic poles. It is formed by magnetizing in the radial direction so as to have 170a and 170b. In the second embodiment, the magnetic pole 170a
Are magnetized to the N pole, while the magnetic pole 170b is magnetized to the S pole.

The magnetic pole 170b of the rotor 170 is
The locking member 172 has a locking member 172.
Near the boundary between the two magnetic poles 170a and 170b, the magnetic pole 170
The two stoppers 121, 1 from the lower part of the front wall shown in FIG.
It protrudes like a protrusion between 31. Then, coil 1
When no current is supplied to the magnetic pole 50, the magnetic pole 17
0a is pulled by the stator plate 120 while the rotor 1
The 70 magnetic pole 170b is pulled by the stator pole plate 130.
Therefore, the locking member 172 is locked to the distal end of the stopper 131 as shown in FIGS.

On the other hand, when current flows from the input terminal 151 to the coil 150 in a direction in which the inner wall 122 of the stator plate 120 becomes the N pole and the inner wall 132 of the stator plate 130 becomes the S pole, 170a is repelled by the stator plate 120, and
Are repelled by the stator pole plate 130. For this reason, the rotor section 170 rotates together with the output shaft 160 in the direction of the arrow shown in FIG.
To the tip of the stopper 121. The rotation angle of the rotor unit 170 from when the locking member 172 is locked to the stopper 131 to when the locking member 172 is locked to the stopper 121 is 4 degrees.
5 degrees.

Unlike the first embodiment, the emitter of the switching transistor 90 described in the first embodiment is connected to the input terminal 151 of the coil 150, and the negative terminal of the battery 100 is connected to the negative terminal of the coil 150. Connected to input terminal 152. Further, unlike the first embodiment, the low-level period of the pulse signal from the pulse signal generation circuit 110 described in the first embodiment has the same time width as the high-level period of the pulse signal. The projections 13a and 13b of the housing 10 and the coils 70a and 70b are omitted. Other configurations are the same as those of the first embodiment.

In the second embodiment thus configured, it is assumed that no current flows through the coil 150.
At this time, the locking member 172 of the rotor section 170 is locked to the distal end of the stopper 131 as shown in FIG. In such a state, when the switching transistor 90 is turned on similarly to the first embodiment,
DC current of the battery 100 flows through the coil 150 from the input terminal 151 to the input terminal 152.

At this time, each of the stator plates 120, 130
The inner and outer walls of the coil 15 have the polarity shown in FIG.
It is magnetized by zero magnetic flux. For this reason, the rotor section 170
Each of the magnetic poles 170a, 170b
130 are repelled by the inner walls of the rotor unit 17.
0 rotates in the direction of the arrow shown in FIG. 8 until the locking member 172 is locked with the stopper 121.

Accordingly, the output shaft 160 is connected to the rotor 17
0, and the one-way clutch 80 transmits the rotational force of the output shaft 160 to the blower fan F in the engaged state shown in FIG. Thereafter, when the switching transistor 90 is turned off as in the first embodiment, no current flows through the coil 150.
The magnetic poles 170a and 170b of the rotor section 170 are pulled, respectively. For this reason, the rotor portion 170 is turned in the direction opposite to the arrow direction shown in FIG.
Rotate until locked.

At this time, the one-way clutch 80 is
Since the dissociation state shown in (c) is reached, the output shaft 160 starts to reverse in the idling state. At this time, since the cylindrical member 81 is stationary, transmission of torque from the output shaft 160 to the blower fan F is stopped. Thereafter, similarly, transmission of one-way rotational force from the rotor Ra to the blower fan F is performed by the one-way clutch 80 during a high-level period of each pulse signal sequentially output from the pulse signal generation circuit 110, During the low level period of each pulse signal, the one-way clutch 80 blocks the pulse signal.

As a result, only the rotational force in one direction can be transmitted to the blower fan F while smoothly rotating the blower motor. In this case, unlike the first embodiment, the two coil springs 70a and 70b are not required, so that substantially the same operation and effect as the first embodiment can be achieved while further simplifying the structure as the blower motor. .

Incidentally, by conducting experiments on the blower motor of the second embodiment, the pulse signal generation circuit 1
When the relationship between the frequency of the pulse signal from No. 10 and the rotation speed of the output shaft 160 was examined, the results shown in FIG. 9 were obtained. The voltage applied to the coil 150 is 2.5 V
And 3.0 V. In FIG. 9, a graph L1 shows the relationship between the frequency and the rotation speed when the applied voltage is 2.5 V, and a graph L2 shows the relationship between the frequency and the rotation speed when the applied voltage is 3.0 V.

According to these, it is understood that the higher the frequency of the pulse signal, the higher the rotation speed of the output shaft 160. It can also be seen that the higher the applied voltage, the higher the number of rotations of the pulse signal. Therefore, it can be seen that by adjusting the frequency of the pulse signal and the applied voltage, the rotation speed of the output shaft 160 can be controlled while achieving the operation and effect of the second embodiment.

(Third Embodiment) FIGS. 10 to 19 show a third embodiment of the present invention. In the third embodiment, a blower motor Ma having the configuration shown in FIG. 10 is employed in place of the blower motor M described in the first embodiment. The blower motor Ma includes a housing 180 made of a magnetic material, as shown in FIG.
The housing 180 is fixed in place at the upstream portion of the air duct, instead of the housing 10 described in the first embodiment. The housing 180 plays a role as a yoke.

The blower motor Ma is connected to the housing 1
80, a stator Sb accommodated coaxially is provided.
The stator Sb has an annular stator portion 190 made of a non-magnetic material and a disk-shaped stator portion 20 made of a permanent magnet.
0. The stator section 200 may be formed integrally with the stator section 190, and an annular portion corresponding to the stator section 190 may be kept in a non-magnetized state.

The stator portion 190 is coaxially fixed to the annular peripheral wall 181 in the housing 180 at the outer peripheral wall. The stator portion 200 is concentrically fixed to the outer peripheral wall within the stator portion 190 at the outer peripheral wall. The stator portion 200 has six substantially fan-shaped magnetic poles 202 to 207 (FIG. 13). (See FIG. 2) at equal angular intervals. Here, the stator unit 200
Of the magnetic poles 202 to 207 are magnetized in parallel with the axial direction of the output shaft 210, and both of the magnetic poles 202 to 207 adjacent to each other are magnetized with opposite polarities ( See FIG. 13).

The blower motor Ma is connected to the housing 1
80 is provided with a rotor Rb coaxially housed therein. The rotor Rb has a stepped output shaft 210, and the output shaft 210
And coaxially inserted therethrough, and each of the small diameter portions 211, 21
At 2, it is rotatably and coaxially supported by the bottom walls 182 a and 183 a of the two cylindrical portions 182 and 183 of the housing 180 via a pair of ball bearings 210 a and 210 b.

The output shaft 210 has a small diameter 212
Is coaxially press-fitted into the shaft hole f of the blower fan F at the tip of the blower fan F. The rotor Rb has a pair of one-way clutches 220 and 230, and these one-way clutches 220 and 230 are connected to the large-diameter portion 21 of the output shaft 210.
3, 214 are coaxially fitted from the outside.

Here, an annular spacer 213 fitted to the large-diameter portion 213 between a cylindrical member 221 to be described later of the one-way clutch 220 and the inner ring of the ball bearing 210a.
a, the cylindrical member 221 is connected to the central step portion 21 of the output shaft 210;
Positioning is performed with reference to 5. Also, one-way clutch 2
30, a cylindrical member 231 and a ball bearing 21 described later.
An annular spacer 214a fitted to the large-diameter portion 215 between the inner ring and the inner ring 0b positions the cylindrical member 221 with reference to the central step 215 of the output shaft 210.

Each one-way clutch 220, 230
It has the same configuration as the one-way clutch 80 described in the first embodiment. One-way clutch 220
As shown in FIG. 15, FIG. 17 and FIG. 19, the cylindrical member 81 of the one-way clutch 80, the coil spring 82, the steel ball 83, the cylindrical member 221 corresponding to the partition 81a and the accommodation chamber 81b, the coil spring 222, the steel ball 223, respectively. , A partition 221a and an accommodation chamber 221b.

The one-way clutch 230 is the same as that shown in FIG.
5, a cylindrical member 81 of a one-way clutch 80, a coil spring 82, a steel ball 83,
A cylindrical member 231, a coil spring 232, a steel ball 233, and a partition 231 corresponding to the partition 81a and the accommodation chamber 81b, respectively.
a and an accommodation room 231b. Annular holding member 240
Is coaxially press-fitted into the cylindrical member 221 of the one-way clutch 220, while the annular holding member 250 is
It is press-fitted coaxially into the cylindrical member 231 of the one-way clutch 230.

The armature plates 260 and 270 are connected to the rotor Ra
The armature plate 260 includes a disk 261 made of an electrically insulating material and an armature winding 262 formed on the disk 261. on the other hand,
The armature plate 270 has the same configuration as the armature plate 260, and includes a disk 271 and an armature winding 272 (see FIG. 15) corresponding to the disk 261 and the armature winding 262, respectively.

Here, the discs 261 and 271 are respectively held by the holding members 240 and 2 at the respective center holes 261a and 271a.
50 are fitted coaxially to the outer peripheral portion. The central hole 261a of the disk 261 is
Between the annular flange portion 241 and the annular retaining member 280 pressed into the outer peripheral portion of the holding member 240 so as not to be relatively rotatable. The central hole 271 a of the disk 271 is connected to the annular flange 25 of the holding member 250.
1 and an annular retaining member 290 press-fitted into the outer peripheral portion of the holding member 250, the retaining member 290 is non-rotatably pinched and retained.

Next, the configuration of the armature windings of the armature plates 260 and 270 will be described. As illustrated in FIG. 11A, the armature winding of the armature plate 260 has a lap winding configuration. The armature winding 262 is formed by mounting a plurality of coils each including a pair of coil sides 262a and 262b in a radial direction across both surfaces of the disc 261 by lap winding, and the respective coils are connected in series. It is connected. Here, each coil side 262a is mounted on the front surface 261b of the disk 261 while each coil side 262b is mounted on the back surface 261c of the disk 261. Note that each coil side 262a faces the stator Sb.

Of the coil sides of the armature winding 272 of the armature plate 270, each coil side 272b corresponding to each coil side 262b of the armature winding 262 is provided on the back surface (the surface on the side of the stator Sb) of the disk 271. It is installed. On the other hand, the armature plate 2
70, each coil side 27 corresponding to each coil side 262a of the armature winding 262 among the respective coil sides of the armature winding 272.
2a is mounted on the surface of the disk 271.

As shown in FIG. 10, the torsion coil spring 290 includes a small-diameter portion 211 of the output shaft 210 and a ball bearing 210a in the cylindrical portion 182 of the housing 180.
It is assembled coaxially. Here, the torsion coil spring 290 is supported between the bottom wall 182 a of the cylindrical portion 182 and the annular retaining member 280. Further, one end of the torsion coil spring 290 is seated on a seat 182b provided on the inner peripheral portion of the inner surface of the bottom wall 182a from the front side to the back side of the drawing in FIG. On the other hand, the other end of the torsion coil spring 290 is seated on the notch seating portion 281 of the annular retaining member 280 from the front side to the back side in FIG.

The torsion coil spring 290 is formed by winding a conductive spring wire material in the screw direction of the right screw when the right screw is advanced from the bottom wall 182a to the annular retaining member 280 in FIG. ing. As shown in FIG. 10, the torsion coil spring 300 is assembled coaxially with the small diameter portion 212 of the output shaft 210 and the ball bearing 210b in the cylindrical portion 183 of the housing 180. Here, the torsion coil spring 300 is
83 is supported between the bottom wall 183 a and the annular retaining member 290.

Here, one end of the torsion coil spring 300 is seated on a seating portion 183b provided on the inner peripheral portion of the inner surface of the bottom wall 183a from the front side to the rear side in the drawing of FIG. On the other hand, the other end of the torsion coil spring 300 is seated on the notch seating portion 291 of the annular retaining member 290 from the front side to the back side of the drawing in FIG. The torsion coil spring 300 is formed by winding a conductive spring wire material in a direction opposite to that of the torsion coil spring 290.

The torsion coil spring 310 is connected to the stator Sa
, A one-way clutch 240,
Step 215 of output shaft 210 and one-way clutch 25
0 and coaxially. Here, one end of the torsion coil spring 310 is seated from a front side to a back side of the drawing in FIG. 10 on a cutout seating part 241 a formed in the annular flange part 241 of the holding member 240. On the other hand, the other end of the torsion coil spring 310 is
Notch seating portion 25 formed in annular flange portion 251
In FIG. 10a, the user is seated from the front side to the back side in FIG.

The torsion coil spring 310 is formed of a conductive spring wire material. The torsion coil spring 310 generates a load in the winding direction when the torsion coil springs 290 and 300 generate a load in the winding direction. It is wound. When the torsion coil springs 290, 300, and 310 have no load on each other,
4 (a), the cross section shown in FIG.
This is so that the seating state at both ends of each torsion coil spring 290, 300, 310 can be clearly shown.

Each of the above-described torsion coil springs 290, 30
Nos. 0 and 310 are respectively coated with an electrically insulating film, and these torsion coil springs 290, 300
And 310 are bare at both ends. And
One end of the torsion coil spring 290 (on the seat 182b) is connected to a control circuit (having substantially the same configuration as the control circuit of the second embodiment) via a wiring W. The other end (seating part 281)
(On the upper side) is connected to a terminal (one input terminal on one side of the armature winding of the armature plate 260) on the back side coil side 262b of the disk 261 of the armature plate 260.

One end of the torsion coil spring 310 (the seat 2
41a) is a surface side coil side 262 of the disk 261.
a (the other input terminal of the armature winding of the armature plate 260), and the other end of the torsion coil spring 310 (on the seat 251 a) is connected to the disk 271 of the armature plate 270. (The other input terminal of the armature winding of the armature plate 270).

One end of the torsion coil spring 300 (located on the seating portion 291) is a terminal on the back side of the disk 271 of the armature plate 270 (an input terminal on one side of the armature winding of the armature plate 270). The other end of the torsion coil spring 300 (located on the seat 183b) is grounded. Thus, the current from the control circuit sequentially flows through the torsion coil spring 290, the armature winding 262, the torsion coil spring 310, the armature of the armature plate 270, and the torsion coil spring 300.

FIG. 12 schematically shows the main structure of the rotor Rb thus configured. That is, each armature plate 260, 270 is provided with each torsion coil spring 290, 3
The torques in opposite directions are received according to the torsional forces of 00 and 310. In the third embodiment configured as described above, when no current flows through the blower motor Ma, the armature plates 260 and 270 and the stator Sb are in a state shown in FIG.

At this time, each of the torsion coil springs 290, 3
Reference numerals 00 and 310 are mutually balanced in the state shown in FIG.
Reference numerals 20 and 230 are in the state shown in FIG. In FIG. 13, the arrow B1 indicates the magnetic pole 20 of the stator Sb.
2, 204, and 206 indicate the generated magnetic flux, and arrow B1 indicates the generated magnetic flux of the magnetic poles 203, 205, and 207 of the stator Sb.

In such a state, when a current flows from the control circuit to one end of the torsion coil spring 290, this current passes through the torsion coil spring 290 and passes through the armature plate 26.
0 flows in the direction indicated by the arrow in FIG. Next, this current passes through the torsion coil spring 310 and flows through the armature winding of the armature plate 270 in the direction of the arrow shown in FIG. Then, this current is applied to the torsion coil spring 3
Pass through 00.

At this time, currents flow in opposite directions on the coil sides of the armature plates 260 and 270 facing each other. Also, each magnetic pole 202, 204 of the stator unit 200,
The magnetic flux of 206 interlinks with the coil sides of the coil sides of both armature plates 260 and 270 which are located at positions facing these magnetic poles 202, 204 and 206. Accordingly, the electromagnetic force according to Fleming's left hand rule is applied to each armature plate 260, 2
70, and acts on each armature plate 260, 27
0 rotate in the opposite directions (see the arrows C and D shown in FIG. 15) by receiving the rotational torque.

At this time, the one-way clutch 220 enters the idle state as shown in FIG. 16B, and the one-way clutch 230 enters the meshing state as shown in FIG. 16B. For this reason, the output shaft 210 receives the rotation torque from the armature plate 270 by the one-way clutch 230, and rotates in the direction of the arrow shown in FIGS. Accordingly, the blower fan F is connected to the output shaft 210.
Is driven in the rotation direction.

In such a process, each of the torsion coil springs 290, 310, 300
By the rotation of 60 and 270, the torsional force is stored together.
After stopping for a predetermined time, when the flow of current from the control circuit to the torsion coil spring 290 is stopped, each armature plate 26
0, 270 are torsion coil springs 290, 310, 3
00, the torsional forces are reversed in the direction in which the torsional force returns (see the directions of arrows C1 and D1 in FIG. 17).

At this time, the one-way clutch 220
The meshing state shown in FIG.
0 is the armature plate 260 by the one-way clutch 230
18 (b) and FIG.
Rotates in the direction indicated by the arrow. Accordingly, the rotation of the blower fan F is continued by the output shaft 210. As described above, the output shaft 210 is rotated in the same direction to drive the blower fan F by repeating the flow of the current from the control circuit to the rotor Rb and the stop thereof.

In this case, as described above, the control circuit may be substantially the same as the control circuit described in the second embodiment, and the circuit for detecting the rotational position of the rotor Rb is unnecessary. Thus, substantially the same functions and effects as those of the first or second embodiment can be achieved. Further, when the current is flowed into the rotor Rb and stopped so as to match the resonance frequency of each of the torsion coil springs 290 to 310, the rotation angles of the armature plates 260 and 270 can be further increased.

FIG. 19 shows a first modification of the third embodiment. In the first modified example, instead of the torsion coil spring 310 described in the third embodiment, a pair of torsion coil springs 310a and 310b are provided coaxially with both one-way clutches 230 and 240. A partition 310c made of a non-magnetic material is interposed between 310a and 310b. In addition,
The partition wall 310c extends from the central hole 201 of the stator unit 200 toward the axis. Other configurations are the same as in the third
This is the same as the embodiment.

According to the first modification, the same operation and effect as those of the third embodiment can be achieved. FIG. 20 shows a second modification of the third embodiment. In the second modification, the wiring W1 is replaced with the other input terminal of the armature of the armature plate 260 and one of the armatures of the armature plate 270, instead of the torsion coil spring 310 described in the third embodiment. It is connected between the side input terminal. Other configurations are the same as those of the third embodiment.

According to the second modification, the same operation and effect as those of the third embodiment can be achieved. FIG. 21 shows a third modification of the third embodiment. In the third modification, both permanent magnet plates 200A, 20
0B and armature plates 260A, 27 constituting the stator
0A is employed in place of the stator Sb and the armature plates 260 and 270 described in the third embodiment.

Each of the permanent magnet plates 200A and 200B has the same configuration as that of the above-described stator portion 200.
Instead, it is sandwiched between the annular retaining member 280 and the flange portion 241 of the holding member 240. On the other hand, the permanent magnet plate 200B has the armature plate 2 at its central hole.
70, the annular retaining member 290 and the holding member 25
0 and the flange 251.

However, the magnetic poles of the two permanent magnet plates 200A and 200B are magnetized with the same polarity for each of both magnetic poles facing each other. The armature plates 260A and 270A are mounted on both surfaces of a support plate 184 extending from the peripheral wall 181 of the housing 180 toward the axis thereof. These two armature plates 260A, 270A have the same configuration as the two armature plates 260, 270, respectively, and the coil sides of both armature plates 260A, 270A are located at the same angular position. ing. Note that both armature plates 2
Each input terminal of 60A and 270A is connected to the control circuit by a wiring W2. Other configurations are the same as those of the third embodiment.

In the third modified example configured as described above, contrary to the third embodiment, both armature plates 260A,
270A is fixed to the housing 180, and each permanent magnet plate 200a, 200B is connected to each one-way clutch 240,
It will be fixedly supported by the 50 cylindrical members. As a result, each of the permanent magnet plates 200A and 200B
Instead of the armature plates 260 and 270 described in the embodiment, they rotate similarly to the armature plates 260 and 270 (see FIG. 22). As a result, according to the third modification,
Functions and effects substantially similar to those of the third embodiment can be achieved.

In implementing the present invention, a one-way clutch shown in any of FIGS. 23 to 24 may be employed instead of the one-way clutch described in each of the above embodiments. Here, the one-way clutch 320 shown in FIG. 23 includes a cylindrical member, a coil spring 322, and a steel ball 323 corresponding to the cylindrical member, the coil spring, and the steel ball of the one-way clutch 220, respectively. The large-diameter portion 21 of the output shaft 210 is used as the rotation shaft 324.
2 may be the cross-sectional shape shown in FIG.
Thereby, one-way clutch 320 exhibits the same function as one-way clutch 220.

One-way clutch 330 shown in FIG.
Has a cylindrical member 331, a coil spring 332, and a steel ball 333 respectively corresponding to the cylindrical member, the coil spring, and the steel ball of the one-way clutch 220. In addition, as the rotating shaft 334, the cross-sectional shape of the large-diameter
4 may be used. Accordingly, one-way clutch 330 exhibits the same function as one-way clutch 220.

One-way clutch 340 shown in FIG.
Are the cylindrical member 341 and the pin 3 corresponding to the cylindrical member, the coil spring, and the steel ball of the one-way clutch 220, respectively.
42. Here, the pin 342 is inserted movably in the radial direction into the radial hole 343a of the rotating shaft 343. As a result, the pin 342 is displaced in the radial hole 343a while sliding along the inner peripheral surface of the cylindrical member 341 with the rotation of the rotating shaft 343, and the one-way clutch 220
Exhibits substantially the same function.

The one-way clutches 350 and 360 shown in FIG. 26 also have the same functions as the one-way clutch 220 by the structure shown. The one-way clutches shown in FIGS. 23 to 27 may be adopted as the one-way clutches 80 and 230. Further, the present invention is not limited to the blower motor of the air conditioner, and may be applied to the present invention as a rotational drive source of various devices.

In implementing the present invention, each of the torsion coil springs 290, 300,
310 may be formed of a non-conductive spring wire material. In this case, a current flows through each armature winding of each armature plate 260, 270. With this, the same operation and effect as the first embodiment can be achieved.

[Brief description of the drawings]

FIG. 1 is a fragmentary side view showing a first embodiment of the present invention.

FIG. 2 is a schematic exploded perspective view of the stator and the rotor of FIG.

3 (a) to 3 (c) are front views showing an operation state of the one-way clutch of FIG. 1;

FIG. 4 is a control circuit diagram for controlling a series circuit of each coil of the stator of FIG. 1;

FIG. 5 is a graph showing the relationship between the electromagnetic force of the rotor, the spring force of each coil spring, and the rotation angle of the rotor.

FIG. 6 is a perspective view showing a second embodiment of the present invention.

FIG. 7 is a front view showing a state where no current flows through the coil of FIG. 6;

FIG. 8 is a front view showing an operation state when a current is supplied to the coil of FIG. 7;

FIG. 9 is a graph showing a relationship between a rotation speed of an output shaft and a frequency of inflow of a current to a coil and a frequency of stopping the current in the second embodiment.

FIG. 10 is a sectional view showing a third embodiment of the present invention.

FIG. 11A is a front view of the armature plate of FIG. 10;
FIG. 12B is a partially cutaway side view of the armature plate of FIG.

FIG. 12 is a schematic side view showing a relationship between each torsion coil spring and each armature plate shown in FIG. 10;

FIG. 13 is a perspective view showing a state of each torsion coil spring, a stator portion, and each armature plate when current is not supplied to each armature plate of FIG. 10;

14A is a front view of each torsion coil spring as viewed from the right in FIG. 13, and FIG. 14B is a one-way view when each torsion coil spring is in the state shown in FIG. FIG. 2 is a front view of the one-way clutch showing a state of the clutch.

FIG. 15 is a perspective view showing a state of each torsion coil spring, a stator unit, and each armature plate when a current flows through each armature plate of FIG. 13;

16A is a front view of each torsion coil spring as viewed from the right in FIG. 15, and FIG. 16B is a one-way view when each torsion coil spring is in the state shown in FIG. FIG. 2 is a front view of the one-way clutch showing a state of the clutch.

FIG. 17 is a perspective view showing a state of each torsion coil spring, a stator unit, and each armature plate when current flowing through each armature plate of FIG. 13 is stopped.

18A is a front view of each torsion coil spring as viewed from the right in FIG. 17, and FIG. 18B is a one-way view when each torsion coil spring is in the state shown in FIG. FIG. 2 is a front view of the one-way clutch showing a state of the clutch.

FIG. 19 is a schematic side view showing a main part of a first modification of the third embodiment.

FIG. 20 is a schematic side view showing a main part of a second modification of the third embodiment.

FIG. 21 is a sectional view showing a third modification of the third embodiment.

FIG. 22 is a schematic perspective view showing a relationship between both stator portions and both armature plates in FIG. 21.

FIG. 23 is a front view showing a modification of the one-way clutch described in each of the above embodiments.

FIG. 24 is a front view showing another modification of the one-way clutch described in each of the above embodiments.

FIG. 25 is a front view showing another modification of the one-way clutch described in each of the above embodiments.

FIG. 26 is a front view showing another modification of the one-way clutch described in each of the above embodiments.

FIG. 27 is a front view showing another modification of the one-way clutch described in each of the above embodiments.

[Explanation of symbols]

10, 180 ... housing, 20 ... stator part, 22 to 25, 262, 272 ... armature winding, 30, 160,
210: output shaft, 60a to 60d, 170a, 170
b: magnetic poles, 70a, 70b: coil springs, 80, 22
0, 230, 320 to 360 ... one-way clutch,
120, 130: stator pole plate, 140: pole plate, 15
0: coil, 182a, 183a: bottom wall, 200, ... stator portion, 200A, 200B: permanent magnet plate, 260,
260A, 270, 270A ... armature plate, 290, 30
0, 310: torsion coil spring, R, Ra: rotor,
S, Sa ... stator.

 ──────────────────────────────────────────────────の Continuing from the front page (72) Inventor Yuichi Sakagami 14 Iwatani, Shimowakakucho, Nishio City, Aichi Prefecture Inside Japan Automotive Parts Research Institute Co., Ltd. (72) Inventor Sadahisa Onimaru 14 Iwatani, Shimowasumi-machi, Nishio-shi, Aichi Japan

Claims (7)

[Claims] An armature plate (S) fixed to a stationary member (10) and positioned coaxially with an output shaft (40); and spring means (70a, 70b) fixed to said stationary member.
And a current flowing through the armature windings (22 to 25) of the armature plate, wherein the permanent magnet has a plurality of magnetic poles (60a to 60d) coaxially located with the armature plate along the circumferential direction. In response to the reaction of the electromagnetic force between the magnetic poles, the armature rotates in one direction against the spring means, and in the other direction due to the action of the spring means as the current stops flowing into the armature winding. A rotating permanent magnet (60), and a one-way clutch provided coaxially with the output shaft so that rotation of the permanent magnet in one direction or another direction is maintained in a fixed direction of the output shaft. One-way clutch (80, 320 to 36) transmitting to the output shaft
0). 2. A plurality of magnetic poles (60a to 60a) fixed to a stationary member (10) and positioned coaxially with an output shaft (40).
d) a permanent magnet (60) having a circumferential direction, and spring means (70a, 70b) fixed to the stationary member.
And an armature plate positioned coaxially with the permanent magnet and receiving a reaction of an electromagnetic force between the current flowing into the armature windings (22 to 25) and each of the magnetic poles to apply a force to the spring means. An armature plate (S), which rotates in one direction in opposition and rotates in the other direction under the action of the spring means when the inflow current stops, and a one-way clutch provided coaxially with the output shaft. A one-way clutch (80, 320 to 36) for transmitting rotation of the armature plate in one direction or the other direction to the output shaft so as to maintain the output shaft in a fixed direction.
0). 3. A rotor (Ra) having an output shaft (160) and a rotor portion (170) provided coaxially with the output shaft and comprising a permanent magnet having a plurality of magnetic poles. Both opposing portions (12) opposing each other via the outer peripheral surface of the rotor portion
0, 130) (120, 13).
0, 140)) and a coil (150) wound around an intermediate portion of the magnetic body, and when no current flows through the coil, each of the opposed portions of the rotor portion is opposed by the opposed portion. The rotor is rotated in one direction by attracting the magnetic poles, and the opposing portions repel each of the magnetic poles of the rotor facing each other in response to the flow of current into the coil to move the rotor in the other direction. Stator (Sa)
A one-way clutch provided coaxially with the output shaft, the one-way clutch transmitting rotation in one direction or the other direction of the rotor portion to the output shaft so as to maintain rotation of the output shaft in a fixed direction. Clutch (80, 320 to 36
0). 4. An armature plate (260, 270) located coaxially with the output shaft (210), and armature windings (262, 272) of the armature plate fixed to a stationary member (180). A permanent magnet coaxially located and having a plurality of magnetic poles (202 to 206). The permanent magnet is configured to rotate the armature plate in one direction by an electromagnetic force between a current flowing through the armature winding and each of the magnetic poles. Magnet (20
0), and a torsion coil spring provided coaxially with the output shaft and rotating the armature plate in the other direction when the current to the armature winding is stopped (290, 3).
00), a one-way clutch provided coaxially with the output shaft, wherein rotation of the armature plate in one direction or the other direction is applied to the output shaft so as to maintain rotation of the output shaft in one direction. Transmitting one-way clutch (220, 230, 320)
To 360). 5. A permanent magnet (20) coaxially located with an output shaft (210) and having a plurality of magnetic poles (202 to 206).
0) and an armature plate fixed to the stationary member (180) and positioned coaxially with the permanent magnet, the armature windings (262,
272), the armature plates (260, 260) that rotate the permanent magnet in one direction by an electromagnetic force between the current flowing into the magnetic poles and the magnetic poles.
270), and a torsion coil spring provided coaxially with the output shaft and rotating the permanent magnet in the other direction when current to the armature winding is stopped (290, 3).
00), and a one-way clutch provided coaxially with the output shaft, transmitting rotation of the permanent magnet in one direction or the other direction to the output shaft so as to maintain rotation of the output shaft in one direction. One-way clutch (220, 230, 320
To 360). 6. The first and second armature plates (260, 260) housed in the housing (180) and located coaxially with the output shaft (210) between its axially opposite sides (182a, 183a). 270) and the first and the second armature plates interposed between one of the axially opposite side portions and the first armature plate and between the second armature plate and the other of the axially opposite side portions, respectively. A first and a second torsion coil springs (290, 300) wound in opposite directions to each other, between the first and the second armature plates, so as to be coaxial with the first and second armature plates; A permanent magnet having a plurality of magnetic poles (202 to 206) fixed in the housing, the current flowing between each of the armature windings of the first and second armature plates and each of the magnetic poles. The first and second torsion coil springs by electromagnetic force Permanent magnet anti to rotate the first armature plate in one direction rotates the second armature plate in the other direction (2
00), wherein the first and second torsion coil springs stop the flow of current into each of the armature windings, and
Of the armature plate of the first and second one-way clutches (220, 230,
320 to 360) are provided coaxially with the output shaft to rotate the first armature plate in one direction or another direction and rotate the second armature plate in another direction or one direction, respectively. An electric motor transmitting to the output shaft to maintain rotation of the output shaft in a fixed direction. 7. An output shaft (210) within a housing (180) between its axial sides (182a, 183a).
First and second permanent magnets (200A, 200B) each having a plurality of magnetic poles and located coaxially with the first permanent magnet between one of the axially opposite side portions and the first permanent magnet, and the second permanent magnet. First and second torsion coil springs respectively interposed between the other of the two axial side portions, and first and second torsion coil springs (290, 300) wound in opposite directions to each other; A first and second armature plate fixed in the housing between the first and second permanent magnets so as to be positioned coaxially with the first and second permanent magnets; First and second rotating the first permanent magnet in one direction and rotating the second permanent magnet in the other direction against the first and second torsion coil springs by the electromagnetic force between the first and second torsion coil springs. 2 armature plates (260A, 270A), Serial first and second torsion coil springs, when the stops flow of current to each armature winding, wherein the first and second
The first and second one-way clutches (220, 230,
320 to 360) are provided coaxially with the output shaft to output rotation of the first permanent magnet in one direction or another direction and rotation of the second permanent magnet in another direction or one direction, respectively. An electric motor that transmits power to a shaft to maintain the output shaft rotating in one direction.