JP2002374654A - Clutch operating means - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance magnetic induction force through a compact arrangement by forming a magnetic induction magnet of an inexpensive general purpose material. SOLUTION: A magnetic induction magnet 17 rotating together with a rotor 10a has a diameter smaller than the inside diameter of a copper ring 20b and is disposed inside thereof. An induction ring 20 is born by the rotary shaft 13 of the rotor 10a and the copper ring 20b and the magnetic induction magnet rotate relatively and freely while keeping an appropriate interval, respectively, between the inner and outer surfaces of the copper ring 20b and the outer circumferential surface 17a of the magnetic induction magnet and the inner circumferential surface 15a of a back yoke ring.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a geared motor mainly used for a drive mechanism such as a drain valve of a washing machine and a shutter of a ventilation fan, and more specifically, to an AC synchronous motor which is a drive source of the geared motor. The present invention relates to a motor rotor.

[0002]

2. Description of the Related Art FIG. 3 shows a rotor 10 provided inside an AC synchronous motor 100 used for the above-described geared motor.
FIG. 1 is a side view showing an outline of a general configuration 1 in a longitudinal section. As shown in the figure, a rotor 101 that is rotationally driven by electromagnetic induction of a stator 102 has an outer peripheral side of a rotary support shaft 103 provided with a hole 103a through which a rotor support shaft (not shown) is inserted.
A ring-shaped rotor magnet 104 whose rotation is controlled by the stator 102 is fixed, and a magnetic induction magnet 105 is provided inside the ring-shaped rotor magnet 104.
A magnetic induction rotating body (hereinafter abbreviated as an induction ring) 106 and a back yoke ring 107 are provided. The ring-shaped rotor magnet 104 is integrally formed with the rotation support shaft 103, and the bottom of the ring-shaped rotor magnet 104 in the axial direction is coupled to the flange portion 103 b formed at the lower end of the rotation support shaft 103 so as to be intertwined with each other.

[0003] The magnetic induction magnet 105 is magnetized according to a predetermined pattern to form a ring-shaped rotor magnet 10.
4 Closely adhered to the inner wall and fixed integrally. Induction ring 10
No. 6, a non-magnetic conductive ring (hereinafter abbreviated as a copper ring) 106a made of copper or aluminum or an equivalent non-magnetic metal is arranged on the outer periphery, and is made of a magnetic material (specifically, iron) inside. The back yoke ring 107 is press-fitted and the remainder is integrally formed as a part of the braking pinion 108 by insert molding with resin. The back yoke ring 107 is an iron ring that effectively attracts magnetic flux to the nonmagnetic metal copper ring 106a that generates a magnetic induction force.

The guide ring 106 is supported by the rotor 101 and is relatively rotatable. That is, the rotor 10
The outer peripheral surface near the upper end of the first rotation support shaft 103 is a radial support shaft 103c that rotatably supports the inner peripheral surface of the braking pinion 108 output by the guide ring 106, and the outer peripheral portion near the lower end of the rotation support shaft 103. In this embodiment, a bearing portion 103d for supporting the lower end portion of the cylindrical portion 106b of the guide ring 106 in the thrust direction and a support shaft 103e for supporting in the radial direction are provided. The guide ring 106 has an outer peripheral surface 106c.
Are supported on the rotating shaft 103 while keeping a constant gap from the inner peripheral surface 105a of the magnetic induction magnet 105.

[0005]

However, in this configuration, even if the magnetic induction magnet 105 is thickened to increase the generated magnetic force, the thickness of the magnetic induction magnet 105 is increased because the magnetic induction magnet 105 is disposed inside the ring-shaped rotor magnet 104. Increase is limited. In addition, the magnetic induction magnet 1
Since 05 cannot exceed the height of the rotor 101, it is not possible to increase the magnetic induction magnet 105 to increase the generated magnetic force. Furthermore, the magnetic induction magnet 1
Means in which the material 05 itself is made of a material exhibiting strong magnetic properties has the disadvantage that the cost increases and the marketability is lost.

Accordingly, an object of the present invention is to construct a magnetic induction magnet using a low cost material at present and arrange it inside an induction ring, thereby making it possible to increase the diameter of a copper ring and to generate a magnetic force generated by the magnetic induction magnet. Is to efficiently use the magnetic induction torque as a magnetic induction torque to enhance the magnetic induction force in a compact configuration.

[0007]

In order to achieve the above-mentioned object, a clutch operating means according to the present invention basically comprises a motor, an output shaft connected to a rotor of the motor and driven to rotate, and Clutch means (for example, a differential mechanism using a planetary gear) for disconnecting the connection between the output shaft and the rotor;
In a geared motor mechanism including clutch operating means (for example, a gear train from a sector rack to a gear meshing with a ring gear of a planetary gear) for connecting and disconnecting the clutch means, a magnetic induction mechanism inserted into the rotor and integrally rotating. A magnet and a magnetic induction rotating body (hereinafter abbreviated as an induction ring) which is driven to rotate by the magnetic induction of the magnetic induction magnet.
Magnetic induction means comprising: a rotor coaxially with the rotor and radially inward of a ring-shaped rotor magnet constituting the rotor, the guide ring being rotatably supported by the rotor; A magnetic induction magnet was provided.

When a magnetic induction magnet and an induction ring are installed in a limited space inside a rotor, the arrangement inside the induction ring is relatively wide and the thickness of the magnetic induction magnet is large, as an arrangement relationship advantageous for magnetic induction. Is easier to do. On the other hand, since the space outside the guide ring is narrow, there is no room for securing the thickness of the magnetic guide magnet to increase the magnetic guide force.

[0009] Further, the magnetic induction force enhancing yokes are provided on the outer peripheral surface of the guide ring and on the rear surface side of the magnetic induction magnet facing the guide ring. Hereinafter, a yoke disposed on the inner surface of the rotor in opposition to the outer peripheral surface of the induction ring is referred to as a back yoke, and a yoke disposed on the back side of the magnetic induction magnet is referred to as a back yoke. Further, a back yoke provided on a surface facing the outer periphery of the guide ring is provided inside the ring-shaped rotor magnet constituting the rotor, and is fixed integrally with the rotor, and is provided separately from the guide ring. did. Thereby, the weight of the guide ring on the rotating side can be reduced, the influence of inertia exerted on the start / stop operation is reduced, and the response speed is improved.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a clutch operating means according to the present invention will be described below with reference to the drawings. FIG.
Is a side view showing, in cross section, the configuration of one application example of the clutch operating means according to the present invention, which utilizes a magnetic induction force generated in a rotor portion of a driving AC synchronous motor 10 of a geared motor 30 (see FIG. 2) described later. FIG. A rotor 10a is driven to rotate by electromagnetic induction of the stator 10b. A ring-shaped rotor magnet 14 whose rotation is controlled by a stator 10b is fixed to the outer peripheral side of a rotary support shaft 13 provided with a hole 12 through which a rotor support shaft (not shown) is inserted. The press-fitted ring-shaped rotor magnet 14 is formed integrally with the rotation support shaft 13 by insert molding, and the axial bottom of the ring-shaped rotor magnet 14 extends to the outer periphery at the lower end of the rotation support shaft 13 as shown in the figure. It is coupled with the existing flange portion 13a in a state of being intricate with each other.

In addition, a magnetic induction magnet 17 is press-fitted into the rotating support shaft 13 on the outer peripheral surface of a cup-shaped back yoke 16 which is a magnetic induction force enhancing yoke, and the back yoke ring 1 is rotated.
5 are provided facing each other with an appropriate gap 18, and are integrally molded by insert molding. The guide ring 20
The inner and outer surfaces of the copper ring 20b which is inserted into the gap 18 set by the back yoke ring 15 and the magnetic induction magnet 17 and constitutes the outer cylindrical portion of the induction ring 20 have the outer circumference 17a of the magnetic induction magnet and the inner circumference of the back yoke ring. Face 15
a is supported on the rotating shaft 13 at a predetermined interval, and is rotatable relative to the rotor 10a.

That is, the rotating shaft 13 of the rotor 10a
Is an upper radial support shaft 13b whose outer peripheral surface near the upper end portion rotatably supports the inner peripheral surface of the braking pinion 21 of the guide ring 20, and a rotary cylinder of the guide ring 20 near the lower end of the rotary support shaft 13. A bearing portion 13c that supports the lower end portion of the portion 20a in the thrust direction and a lower radial support shaft 13d that supports the lower end portion in the radial direction are provided.

The outer cylindrical portion which is the main body of the guide ring 20 is a copper ring 20b made of copper, aluminum or equivalent non-magnetic metal, and is integrally formed with the braking pinion 21 and the rotary cylindrical portion 20a by insert molding. . The back yoke ring 15 is an iron ring that effectively focuses magnetic flux on the copper ring 20b, and efficiently generates magnetic induction force on the non-magnetic copper ring 20b.

The back yoke 16 reinforces the magnetic force of the magnetic induction magnet 17 with an iron ring. As an optimum condition therefor, the height h1 of the back yoke 16 is substantially equal to the height h2 of the magnetic induction magnet 17, and the thickness t1 of the back yoke 16 is a thickness at which the back yoke 16 is magnetically saturated, that is, the thickness of the magnetic induction magnet 17 Preferably, it is formed to have a thickness of about 60% of the thickness t2. Since the magnetic flux generated by the magnetic induction magnet 17 uses the back yoke 16 as a magnetic path, the magnetic flux passing through the copper ring 20b is greater than when the back yoke 16 is not provided.
Without the back yoke 16, it is difficult to form a magnetic path on the opposite side of the copper ring 20b, and the magnetic flux passing through the copper ring 20b decreases.

Further, by disposing the magnetic induction magnet 17 inside the copper ring 20b, the magnetic induction magnet disposed on the inner surface of the ring-shaped rotor magnet 14 within the limited size within the ring-shaped rotor magnet 14. The outer diameter of the copper ring 20b can be increased by an amount corresponding to 105 (see FIG. 3). Assuming that the magnetic induction force per unit area of the copper ring 20b is the same, the surface area of the copper ring 20b increases as the outer diameter of the copper ring 20b increases, so that the generated torque naturally increases.

In addition, in the structure of the rotor 10a in the clutch operating means according to the present invention, the back yoke ring 15, the copper ring 2
0b, the magnetic induction magnet 17 and the back yoke 16 need to be arranged.
Arranging the magnetic induction magnet 17 inside is extremely effective in obtaining a stronger magnetic induction force with a combination of materials having the same performance.

That is, in the structure shown in FIG.
To increase the outer diameter of the magnetic induction magnet 10a,
Although it is necessary to make the thickness of the magnet 5 thin, in general, if the magnet is thin, the strength is reduced and the magnetic force is very weak. Therefore, FIG.
In the configuration described above, the effect of expanding the diameter of the copper ring 106a is weak. On the other hand, the rotor 1 of the clutch operating means according to the present invention
When the magnetic induction magnet 17 is located inside the copper ring 20b as in the configuration of FIG. 0a, the back yoke 15 is made thinner to maximize the outer diameter of the copper ring 20b. And the magnetic force does not decrease.

Hereinafter, the operation of the clutch operating means according to the present invention will be described. FIG. 2 shows the rotor 10a shown in FIG.
Is a schematic diagram for explaining the configuration and operation of an embodiment in which the rotor 10a is applied to a geared motor 30. A reduction gear train 32 in which a rotor 10a of an AC synchronous motor 10 is driven via a clutch pawl 11 on the upper side, and an induction ring 20 on a lower side. Gear train 3 linked with
4 are each shown. In the arrangement of FIG. 2, in order to avoid complicating the drawing, unlike the configuration of the rotor 10a shown in FIG. 1, the braking pinion 21 of the guide ring 20 is shown below.

First, the structure of a geared motor 30 to which the clutch operating means according to the present invention is applied will be described with reference to FIG. The geared motor 30 includes an AC synchronous motor 10 that is rotationally driven by the electromagnetic action of a stator 10 b facing the rotor 10 a, a reduction gear train 32 that transmits the driving force to an output shaft 36 of the geared motor 30, and a rotor 1.
A speed-increasing gear train 34 including the induction ring 20 for controlling the output shaft 36 by switching the operation of the planetary gear mechanism 37 constituting the differential clutch and rotating in conjunction with 0a. The output shaft 36 is connected to an external load by a lever 50.

The drive clutch pawl 11 (see FIG. 1) formed at the tip of the rotation support shaft 13 of the rotor 10a, the rotor 10a
And faces a passive clutch pawl 40a on the lower surface of the clutch pinion 40 rotatably supported by the rotor support shaft. The clutch pinion 40 is driven by the compression coil spring 41 so that the passive clutch pawl 40a is connected to the drive clutch pawl 11 of the rotor 10a.
It is urged away from The cam surface 42a of the clutch lever 42 faces the biasing direction of the clutch pinion 40, and the clutch pinion 40 is
2a.

The cam surface 42a pushes the clutch pinion 40 in the direction of the rotor 10a against the urging force of the compression coil spring 41, and engages the passive clutch pawl 40a with the driving clutch pawl 11 of the rotor 10a. And a valley surface for releasing the occlusion. The clutch lever 42 is connected to the output shaft 3
6 is rotatably supported on the same support shaft 43a as the transmission gear 43 for driving the motor 6, and swings in a predetermined range.

Further, a part of the clutch lever 42 is opposed to a clutch lever operation groove 36b formed on a side surface of an output gear 36a provided integrally with the output shaft 36, and is engaged with an operation projection 42d. Therefore, with the rotation of the output gear 36a, the operation projection 42d following the clutch lever operation groove 36b rotates the clutch lever 42 to switch between the peak and the valley of the cam surface 42a. As a result, the driving clutch pawl 11 and the passive clutch pawl 40a are engaged or separated from each other, and the transmission of rotation from the rotor rotation support shaft 13 to the clutch pinion 40 is interrupted.

The stator 10b is energized and the rotor 10a
In the initial state in which the rotor 10 starts rotating, the driving clutch pawl 11 and the passive clutch pawl 40a are in an occlusal state, and the rotor 10
The rotation of a is directly transmitted to the clutch pinion 40. The clutch pinion 40 is connected to the input gear 3 of the planetary gear mechanism 37.
The rotation is transmitted to 7a. Revolution gear 3 of planetary gear mechanism 37
Reference numeral 7b is connected to the output gear 36a via the transmission gear 43, and its rotation is prevented by the resistance of an external load applied to the output shaft 36.

Therefore, the planet gear 37c is connected to the input gear 3
It rotates by the sun gear 37d rotating integrally with 7a,
The rotation is transmitted to the externally engaged internal gear 37e. The ring gear 37f rotating integrally with the internal gear 37e meshes with the small gear 34a of the speed increasing gear train 34, and a pinion 46b rotating integrally with the large gear 34b rotating integrally with the small gear 34a is integrally formed. The engaged locking disk 46 is rotated at high speed.

On the other hand, the brake pinion 21 integrally formed with the guide ring 20 meshes with the fan-shaped rack 48 urged by the return spring. The guide ring 20 rotates in conjunction with the rotation of the rotor 10 a by magnetic induction, and rotates in the fan-shaped rack 4.
8 rotates against the urging force of the return spring. Fan rack 4
8 is a fan-shaped rack 48
Together with the projection 46a of the locking disk 46 which is rotating at a high speed, and engages with the projection 46a to regulate the rotation of the locking disk 46. Constrain rotation of.

As the speed increasing gear train 34 is restrained, the ring gear 37f of the planetary gear mechanism 37, that is, the internal gear 37e is prevented from rotating, and the planetary gear 37c starts revolving. With the revolution of the planetary gear 37c, the planetary gear mechanism 37
The revolving gear 37b transmits the rotation to the meshing reduction gear train 32, and rotates the output gear 36a from the large-diameter gear 43b of the transmission gear 43 via the small-diameter gear 43c. Output gear 36
When a rotates a predetermined angle, the clutch lever operation groove 36
The clutch lever 42 is rotated by the clutch lever operating projection 42d that engages with the clutch pin b, thereby releasing the clutch pinion 40 from being pressed. Drive clutch pawl 11 and passive clutch pawl 4
Occlusion with 0a is released, and the clutch pinion 40 is released.

In the clutch pinion 40 that has become free, the rotational force caused by the external load on the output shaft 36 is transmitted back to the reduction gear train 32, and the speed of the clutch pinion 40 changes to reverse rotation. However,
The clutch pinion 40, which has been released and moved upward by the urging force of the compression coil spring 41, is
b abuts against a blocking member (not shown) formed at the rotation position of the clutch lever 42 to restrain the clutch pinion 40.

As long as the rotor 10a continues to rotate, the guide ring 20 rotates to move the fan-shaped rack 48 to the return spring 27.
The engagement between the rotation restricting portion 48a and the projection 46a of the locking disk 46 is maintained against the urging force of the ring gear 37f of the planetary gear mechanism 37, that is, the internal gear 37e via the speed increasing gear train 34. Continue the restraint. On the other hand, the planetary gear mechanism 37
The sun gear 37d is prevented from rotating by the restraint of the clutch pinion 40, so that the revolving gear 37b cannot rotate and keeps the stopped state of the reduction gear train 32, and the restrained portion supports the external load of the output shaft 36. Will be.

When energization of the stator 15 is stopped, the rotor 1
With 0a, the guide ring 20 stops rotating. The guide ring 20 is free to rotate because it is not mechanically constrained, and the fan-shaped rack 48 meshing with the braking pinion 21 of the guide ring 20 returns to the initial state while reversely rotating the guide ring 20 by the biasing force of the return spring. Return. The locking disk 46 becomes rotatable, and releases the restraint of the speed increasing gear train 34. The external load of the output shaft 36 that has lost support rotates the revolving gear 37b from the reduction gear train 32 side by the output gear 36a, and the planetary gear 37c revolves with the sun gear 37d, whose rotation is still restricted, as the fixed side. . Since the locking disk 46 in which the ring gear 37 f rotates via the speed increasing gear train 34 is released from the restraint and is free, the output shaft 36 rotates according to the external load applied to the lever 50.

When the output shaft 36 is rotated by an external load, the output gear 36a, which rotates together with the output shaft 36,
b engages with the operating projection 42d to thereby allow the clutch lever 4
2 is rotated to cause the peak surface 42b of the cam surface 42a to return, and the clutch pinion 40 is pressed to restore the engagement between the drive clutch pawl 11 and the passive clutch pawl 40a.

The operation of the geared motor according to the present invention is as follows. When the stator 10b is energized, the lever 50 attached to the output shaft 36 rotates in one direction to a predetermined angle set by the clutch lever operation groove 36b. , Rotor 10
With the rotation of the guide ring 20 linked to a, the traction force by the electromagnetic non-contact slip action is linked to the mechanical restraint to maintain a predetermined stop position, and when the power supply stops, the initial load is restored by the action of an external load. I do. Since there is no mechanical friction, there is no trouble due to wear.

That is, when the present invention is applied to a drain valve of a washing machine, the valve is opened and the open state is maintained until drain is completed. Also, when applied to the ventilation fan shutter or air conditioner damper, the current is supplied simultaneously with the ventilation fan or air conditioner, and the shutter or damper opens when the ventilation fan rotates or the air conditioner is activated. Alternatively, the damper is held in the open position. Then, when the power supply is stopped at the end of drainage, the ventilation fan or the air conditioner is stopped, the drain valve is closed, and the ventilation fan shutter or the air conditioner damper is closed.

Although the embodiment has been described above, the present invention is not limited to the illustrated embodiment, and the shape, configuration, and the like of the present invention are not limited to the essential constitutional requirements of the present invention, and various details can be provided. It is expected that various changes and modifications such as reconfiguration of parts can be made. For example, the material of the back yoke is not limited to iron, but may be any magnetic material. Further, the thickness of the back yoke is assumed to be magnetically saturated at 60% of the thickness of the magnetic induction magnet from the magnetic strength of the magnet and the material characteristics of the back yoke. However, the thickness is determined by the magnetic strength of the magnetic induction magnet and the magnetic characteristics of the back yoke material. The change of is of course conceivable.

[0034]

As is apparent from the above description, according to the clutch operating means according to the present invention, since the magnetic induction magnet is disposed inside the induction ring and the outer diameter of the induction ring is enlarged, the magnetic induction The magnetic force generated by the magnet can be used efficiently, and a large magnetic induction force can be obtained with a magnetic induction magnet generally formed of inexpensive materials, which guarantees the reliability of operation. In addition, the magnetic induction force can be effectively obtained within a limited size, so that compactness is easy. Furthermore, in a layout that obtains the same magnetic induction force, it is better to arrange the magnetic induction magnet inside.
Since the volume of the magnetic induction magnet can be made small, the effect on material cost saving is extremely effective in consideration of the unit price of a magnet material which is much more expensive than the unit price of copper.

[Brief description of the drawings]

FIG. 1 is a side view showing a cross section of an embodiment of a clutch operating means according to the present invention.

FIG. 2 is a schematic explanatory view showing one embodiment of a geared motor to which a clutch operating means according to the present invention is applied.

FIG. 3 is a side view showing a cross section of a rotor in a general clutch operation means.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 AC synchronous motor 10a Rotor 10b Stator 11 Drive clutch claw 13 Rotation support shaft 14 Ring-shaped rotor magnet 15 Back yoke ring 16 Back yoke 17 Magnetic induction magnet 18 Gap 20 Induction ring 20a Cylindrical part 20b Copper ring 21 Braking pinion 30 Geared motor

Claims (3)

[Claims] 1. A motor, an output shaft connected to a rotor of the motor and driven to rotate, clutch means for connecting and disconnecting the output shaft and the rotor, and clutch operation for connecting and disconnecting the clutch means. A magnetic induction magnet inserted into the rotor and integrally rotating, and a magnetic induction rotator driven by the magnetic induction of the magnetic induction magnet to drive the clutch operating means. Magnetic induction means, wherein the magnetic induction rotating body is rotatably supported by the rotor radially inside a ring-shaped rotor magnet that is coaxial with the rotor and that constitutes the rotor; Clutch operating means provided with an induction magnet. 2. The magnetic induction rotating body according to claim 1, wherein said magnetic induction rotating body is provided with both magnetic induction enhancing yokes on the outer peripheral facing surface and on the back side of said magnetic induction magnet facing said magnetic induction rotating body. 2. The clutch operating means according to 1. 3. A magnetic guiding force-enhancing yoke disposed on an outer peripheral facing surface of the magnetic induction rotating body is provided inside a ring-shaped rotor magnet constituting the rotor, and is fixed integrally with the rotor to form the magnetic guiding force. 3. The clutch operating means according to claim 2, wherein the clutch operating means is arranged apart from the rotating body.