JP2002153016A - Geared motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a geared motor, capable of ensuring on and off operations of a clutch by using a magnetic induction method such as a clutching operating mechanism for turning on and off a clutching means, and by increasing the magnetic induction force, without making a magnet and an induction ring large. SOLUTION: This geared motor comprises an output shaft 3, of which the rotation is driven by connection to a rotor 11, a clutching means 22 for engaging and disengaging the coupling of the output shaft 3 and the rotor 11, and a clutch operating mechanism 5 for engaging and disengaging the clutching means 22. The clutching operating mechanism 5 comprises either a ring-shaped magnet 11c, rotating in synchronization with the rotor 11 or a nonmagnetic conductive ring 16a, one part rotating in synchronism with the other part by magnetic induction, and a back-yoke ring 16b of magnetic material, arranged at a position with the nonmagnetic conductive ring 16a being sandwiched by the ring-shaped magnet 11c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a geared motor mainly used as a drive mechanism for driving a drain valve of a washing machine, a shutter of a ventilation fan, and the like.

[0002]

2. Description of the Related Art Conventionally, a geared motor, which serves as a drive source for a drain valve of a washing machine, a shutter of a ventilation fan, and the like, winds up a load member (wire, lever, etc.) by driving the motor.
The load member is held at the winding position for a predetermined time, and the load member can be returned to the original position from this held state. Such a geared motor includes a clutch between a rotor of a motor serving as a driving source and an output shaft to which a load member is connected. Then, the above-described winding and holding are performed in a state where the clutch is connected, and the load member returns to the original position by the load force of the load member by disconnecting the clutch.

As the above-mentioned clutch, a clutch utilizing a magnetic induction system has been proposed (Japanese Patent Laid-Open No. 3-19 / 1991).
8638). In this device, a permanent magnet and an induction ring are arranged opposite to each other in a reduction gear train connecting a rotor and an output shaft, and clutch switching is performed by using an operation in which the induction ring rotates following a permanent magnet by magnetic induction. The operation piece to be performed is configured to operate.

[0004]

However, in the above-described geared motor, the non-contact magnetic induction force is used as a drive source of an operating mechanism for turning on and off the clutch. This causes a problem that the clutch operating mechanism cannot be operated sufficiently.
The problem that the magnet and the induction ring cannot be operated can be solved by using a strong magnet or an induction ring. However, problems such as an increase in the size of the entire apparatus and an increase in material costs arise.

According to the present invention, a magnetic induction system is used as a clutch operating mechanism for turning on and off a clutch means, and a magnetic induction force is strengthened without increasing the size of a magnet or an induction ring, thereby ensuring on / off of the clutch. It is an object of the present invention to provide a geared motor capable of operating the motor.

[0006]

SUMMARY OF THE INVENTION A geared motor according to the present invention has an output shaft connected to a rotor and driven to rotate, clutch means for disconnecting the connection between the output shaft and the rotor, and connecting the clutch means. A clutch operating mechanism for disengaging the clutch, the clutch operating mechanism includes one of a ring-shaped magnet or a non-magnetic conductive ring that rotates in conjunction with the rotor, the other that rotates following the one by magnetic induction, and a non-magnetic A back yoke ring made of a magnetic material is provided at a position where the conductive ring is sandwiched between the ring-shaped magnets, and the clutch means is connected in conjunction with the other that rotates following.

In the above-described invention, since the non-magnetic conductive ring is sandwiched between the back yoke ring and the ring-shaped magnet, the magnetic flux of the ring-shaped magnet can be easily guided to the back yoke ring, and can intersect with the back yoke ring. Due to the increase in the amount of magnetic flux, the magnetic induction force for following rotation of the other of the non-magnetic conductive ring or the ring-shaped magnet located behind the wheel train when viewed from the rotor becomes strong. For this reason, the rotating body to which the other of the non-magnetic conductive ring or the ring-shaped magnet is attached reliably rotates following the rotating body to which the one is attached, and thereby the clutch operating mechanism for disconnecting the clutch means. Operation is assured, and the connection of the clutch means can be performed reliably.

According to another aspect of the invention, in the above-described geared motor, the back yoke ring is attached to a rotating body to which the nonmagnetic conductive ring is attached, and is configured to rotate integrally with the nonmagnetic conductive ring. It is characterized by:

Another aspect of the present invention is the above-described geared motor, wherein the magnetic center of the ring-shaped magnet in the thrust direction and the magnetic center of the back yoke ring in the thrust direction coincide with or do not coincide with a predetermined position. It is characterized by having been set.

In each of the above-mentioned inventions, the back yoke ring is attached to the non-magnetic conductive ring side, and is arranged to operate separately from the ring-shaped magnet. In addition, the magnetic centers of the back yoke ring and the ring-shaped magnet are matched or intentionally displaced.

As described above, by setting the magnetic centers of the back yoke ring and the ring-shaped magnet at predetermined positions, the rotational position of the rotating body to which the non-magnetic conductive ring and the back yoke ring are attached is set at the predetermined position. It can be set. In other words, using the magnetic center deviation, the thrust receiver is strongly contacted with the thrust receiver to determine the position in the thrust direction, or is set so as to float from the thrust receiver, and the load in the thrust direction (load)
Various settings can be made, such as reducing the pressure, or setting an appropriate thrust pressure by matching the magnetic centers.

According to another aspect of the invention, in the above-described geared motor, the back yoke ring is attached to a rotating body to which the ring-shaped magnet is attached, and is configured to rotate integrally with the ring-shaped magnet. Features. Therefore, the positional relationship between the ring-shaped magnet and the back yoke ring is uniquely determined by the attachment of the back yoke ring to the rotating body, and after attachment, the two members do not move relative to each other. For this reason, it is not necessary to set the magnetic center of the two or to perform positioning. Further, when both are attached to different members, the two are relatively easy to move and the attachment member may be damaged due to abrasion or the like, but such a problem does not occur because there is no relative movement.

According to another aspect of the present invention, in the above-described geared motor, a gap is formed between the non-magnetic conductive ring and the back yoke ring or between the non-magnetic conductive ring and the ring-shaped magnet. It is characterized in that a viscous body is arranged. Therefore, the follow-up rotation of the non-magnetic conductive ring to the ring-shaped magnet can be further ensured by the stickiness of the viscous body.

According to another aspect of the present invention, in the above-described geared motor, the clutch operating mechanism includes a gap between the operation of switching the clutch means from disengagement to the engagement and the operation of switching the clutch means from the engagement to disengagement. The relative speed of the non-magnetic conductive ring and the back yoke ring or the non-magnetic conductive ring and the ring-shaped magnet opposed to each other is different, and when turning off the joint, the rotation speed is fast and the viscous force of the viscous body is stronger It is characterized by being configured to work.

In the above-mentioned invention, the grease used as the viscous body is not so strongly viscous when the relative rotational speed of the members relatively rotating via the viscous body is lower than a certain speed, and is not so strong. In this case, the force due to the viscosity increases. In other words, when the magnetic induction force is generated by the high-speed rotation, the viscosity of the grease is effectively exerted when the rotation is the following rotation, and the magnetic induction force is small (almost no) by the low-speed rotation or the rotation stop. If it is not rotating, the viscosity of grease will not work. For this reason, when operating the clutch operating mechanism using the magnetic induction force, the grease effectively assists the magnetic induction force, and when the following operation by the magnetic induction force is not performed, the grease does not work and the back yoke does not work. The ring can freely rotate with respect to the ring-shaped magnet.

Further, another invention is characterized in that in each of the above-described geared motors, the ring-shaped magnet is attached to the rotor and is constituted by a magnet which is separate from the rotor magnet of the rotor. By attaching the ring-shaped magnet to the rotor in this manner, the entire device becomes compact. in addition,
By making the ring-shaped magnet separate from the rotor magnet, the magnetic induction force of the ring-shaped magnet for magnetically guiding the non-magnetic conductive ring can be set regardless of the magnetic force of the rotor magnet with respect to the stator.

According to another aspect of the present invention, in each of the above-described geared motors, a rotating body to which a non-magnetic conductive ring is attached is disposed at a position radially overlapping the rotor and the rotating body to which the non-magnetic conductive ring is attached. Is provided on the rotor, and a viscous material is attached to the bearing. For this reason, due to the above-mentioned force due to the viscosity of the viscous body, it is possible to more reliably follow the rotating force of the rotating body with the non-magnetic conductive ring attached to the rotor, thereby succeeding the clutch means of the clutch operating mechanism. Operation can be assured. in addition,
Since the rotating body having the non-magnetic conductive ring attached to the inside or outside in the radial direction of the rotor can be arranged, the whole apparatus can be made compact.

According to another aspect of the present invention, in each of the above-described geared motors, the clutch operating mechanism further includes a rotating member biased in one rotational direction by a spring member.
The rotating member receives the driving force of the rotor, and one of the ring-shaped magnet and the non-magnetic conductive ring rotates at a high speed, and the other follows the one, whereby the other rotating direction is opposed to the urging force of the spring member. When one of the ring-shaped magnet and the non-magnetic conductive ring rotates or stops at a low speed, and the other follows rotation at a low speed or stops, the ring-shaped magnet and the non-magnetic conductive ring rotate in one rotation direction by the urging force of the spring member. So as to generate heat when the rotating member is rotated in the other rotation direction against the urging force of the spring member or when it is rotated in one rotation direction by the urging force of the spring member. The set heating member is disposed near the spring member, and the spring force of the spring member changes when the heating member generates heat and when the heating member does not generate heat, and the spring force is turned against the spring force of the spring member. Moving part It is characterized by being configured with settings shape memory spring so weak when rotating.

Therefore, when the rotational force of the rotor is not transmitted to the rotating member by the magnetic induction force, the clutch operating mechanism can be forcibly and reliably returned to the initial state by the spring force of the spring member. Moreover, the spring force of the spring member reacts only with a weak force when operating the clutch operating mechanism using the magnetic induction force, and stops the transmission of the rotational force by the magnetic induction force and returns to the initial state. When it is desired to use a shape memory spring that changes so as to act strongly, contradictory operations (operation of rotating the rotating member by magnetic induction force against the spring force, and operation by magnetic induction force) The transmission of the rotational power is stopped, and the rotational operation of the rotational member by the spring force) can both be reliably performed.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of a geared motor according to the present invention will be described with reference to FIGS.

FIG. 1 is a view for explaining the internal mechanism of the geared motor according to the present embodiment. In particular, FIG. 1 is an exploded sectional view showing in detail the relationship between the members constituting the drive train and the clutch operating mechanism. It is. FIG. 2 is a partially enlarged cross-sectional view for explaining a back yoke ring which is a main part of the present invention and a peripheral portion thereof. FIG. 3 is a plan view of FIG. 2 as viewed from above. FIG. 4 is a plan view in which a cover for covering the lever and a case upper cover for covering the drive mechanism are removed.

As shown in FIG. 1, a geared motor according to a first embodiment of the present invention is an AC motor 1 serving as a driving source.
An output shaft 3 that is connected to a rotor 11 of the AC motor 1 via a driving wheel train 2 and is driven to rotate; and a planetary gear that serves as first clutch means for disconnecting the connection between the output shaft 3 and the rotor 11 A mechanism 22, a clutch operating mechanism 5 for disconnecting and operating the first clutch means, a second clutch means 4 for disconnecting the connection between the output shaft 3 and the rotor 11, and a connecting means for connecting the second clutch means 4. And a clutch lever 41 for disconnecting.
Each of these mechanisms is housed in a case body 12 including a case body 12a and a case upper lid 12b.

In this geared motor, the driving force of the AC motor 1 is transmitted to the output shaft 3 by connecting the second clutch means 4 (meaning that it is connected = ON), and By rotating the slider pinion 7 which is press-fitted and fixed, the lever 8 to which a predetermined load is applied is pulled. Then, the second clutch means 4 is disengaged (meaning that it is disengaged = OFF) and the rotor 11 is turned off.
By disconnecting the clutch pinion 21 that is free from the rotor 11 by locking the clutch pinion 21 with the clutch 11, the components of the drive train 2 can be moved in the opposite direction (when the lever 8 is pulled up). The rotation of the lever 8 is prevented from rotating in the opposite direction, and the lever 8 is held at a position after the lever 8 is pulled up to a predetermined position. This state is achieved by maintaining the current supply to the AC motor 1. Also, from this state, AC
When the power supply to the motor 1 is stopped, the first clutch means 22 is disengaged and the holding force for holding the lever 8 is released. To return to the position.

Hereinafter, a configuration for realizing the operation will be described in detail.

An AC motor 1 serving as a drive source for operating the lever 8 is arranged on the bottom side in the case body 12a. The AC motor 1 includes a stator portion 14 disposed in a cup-shaped motor case 13, a rotor 11 disposed on the inner periphery of the stator portion 14 so as to face the stator portion 14, Is rotatably supported. The rotor shaft 15 has one end penetrating the bottom surface of the motor case 13 and abutting on the bottom surface of the case body 12a, and the other end protruding above the AC motor 1 and formed in a bearing hole formed in the case upper cover 12b. 12e.

Hereinafter, the rotor 11 and the induction rotating body 16 arranged inside the rotor 11 will be described with reference to FIGS.

As shown in FIG. 2, the rotor 11 has a rotary bearing 1 having a hole through which a rotor shaft 15 (see FIG. 1) is inserted.
1a, and a substantially ring-shaped rotor magnet 11b fixed to the outer peripheral side of the rotation bearing 11a so that the upper end protrudes upward. In the present embodiment, a ring-shaped magnet 11c that rotates in conjunction with the rotor 11 is fitted on a surface on the inner circumferential space side of the rotor magnet 11b.

That is, as shown in FIG. 3, four small concave portions 11m are formed at equal intervals on the inner peripheral surface of the rotor magnet 11b, and four small convex portions formed on the inner peripheral surface of the ring-shaped magnet 11. The part 11n is press-fitted in the axial direction while being aligned with these four concave parts 11m. As a result, the rotor magnet 11b, which is a rotor magnet opposed to the stator portion 14, and the magnetic induction ring-shaped magnet 11c for rotating the induction rotating body 16 by magnetic induction are integrated, so that the rotor 11 is formed. Has become.

As shown in FIG. 2, a non-magnetic conductive ring 16a and a back yoke ring 16b which are arranged opposite to the ring-shaped magnet 11c are attached further inside the ring-shaped magnet 11c. The induction rotating body 16 is rotatably arranged. When the ring-shaped magnet 11c rotates due to the rotation of the rotor 11, the non-magnetic conductive ring 16a rotates following the rotation of the ring-shaped magnet 11c by magnetic induction. As a whole, the rotation follows the rotor 11 integrally. The ring-shaped magnet 11c and the non-magnetic conductive ring 16a serve as a drive source for operating the clutch operating mechanism 5 described in detail later. Is engaged. The configuration of the induction rotating body 16 will be described later in detail.

In this embodiment, the ring magnet 11c is formed of a neodymium magnet and is separate from the rotor magnet 11b formed of a ferrite magnet. However, the ring magnet 11c and the rotor magnet 11b are integrated. It may be. However, by forming the ring-shaped magnet 11c separately from the rotor magnet 11b, the properties of each magnet, specifically, the magnetic force and the magnetization direction can be made different between the two magnets 11b and 11c. For this reason, a magnet having a large magnetic force is used as the ring-shaped magnet 11c to enhance the magnetic induction force for rotating the non-magnetic conductive ring 16a in accordance with the rotation, and the AC motor 1 , It is possible to use an inexpensive magnet having a minimum function.

A claw 11d is formed at the upper end of the rotation bearing 11a of the rotor 11. The claw 11d forms a part of the driving wheel train 2 and engages with a claw 21d formed at a lower end of a clutch pinion 21 which is a part of the second clutch means 4 as described later. The rotation force is transmitted to the clutch pinion 21. Then, the state where the pawls 11d and 21d are engaged and the rotational force of the rotor 11 is transmitted to the output shaft 3 side via the clutch pinion 21 is set to the state where the second clutch means 4 is engaged. On the other hand, the state in which the pawls 11d and 21d are disengaged and the rotational force of the rotor 11 is not transmitted to the output shaft 3 is defined as a state in which the second clutch means 4 is disconnected. That is, the second clutch means 4 is a mechanism for engaging and disengaging the claws 11d at the upper end of the rotor 11 and the claws 21d at the lower end of the clutch pinion 21.

At the inner peripheral side of the upper end of the rotation bearing 11a,
As shown in FIG. 2, the rotor 11 and the clutch pinion 21
A groove 11f is formed for fitting a compression coil spring 18 which is a part of the second clutch means 4 for engaging and disengaging. The outer peripheral surface near the upper end of the rotation bearing 11a is a radial bearing 11g that supports the inner peripheral surface of the pinion 16d of the induction rotating body 16. Further, a thrust bearing portion which receives a lower end portion of the cylindrical portion 16c of the induction rotating body 16 in the thrust direction and also serves as a radial bearing of the induction rotating body 16 is provided on an outer peripheral side portion near a lower end of the rotation bearing portion 11a. 11e is provided.

The viscous body (specifically, grease or the like) may be attached to the radial bearing portion 11g and the thrust bearing portion 11e which support the induction rotating body 16. By attaching a viscous body,
An action of assisting the follow-up rotation of the induction rotating body 16 to the rotor 11 is assisted.

That is, in the geared motor according to the present embodiment, the rotation speed of the rotor 11 when the induction rotating body 16 rotates following the rotor 11 by magnetic induction is very high, and the induction rotating body 16 has the high rotation speed. Attempts to follow the rotor 11, but the speed difference is large.
Is at a high relative speed. On the other hand, after the energization of the AC motor 1 is stopped and the rotor 11 is stopped,
Is returned by the spring force of a spring member 39 (see FIG. 4) described later, and relatively rotates with respect to the stopped rotor 11, but the rotation speed itself at this time is very low. Therefore,
At the time of the fast follow-up rotation of the relative rotation of the two 11 and 16, the stickiness of the viscous body assists the follow-up rotation of the induction rotating body 16 with respect to the rotor 11. Conversely, the induction rotating body 16 is returned by the spring force of the spring member 39, and the rotor 11 in the stopped state is
When the rotation relative to the rotation speed is low, the viscous body does not stick because the rotation is at a low speed, and the induction rotating body 16 can rotate without being disturbed by the stickiness.

It should be noted that the above-mentioned viscous body may be attached not to both the radial bearing portion 11g and the thrust bearing portion 11e, but to one of them. Structurally, if grease serving as a viscous body is attached only to the thrust bearing portion 11g, there is an effect that grease is unlikely to be scattered to the outside from a space separated from the outside by the rotor 11 and the induction rotating body 16.

As shown in FIG. 3, four recesses 11k are equally provided in the circumferential direction on the shaft end surface of the rotor magnet 11b of the rotor 11. These recesses 11k
When the rotor 11 starts reverse rotation at the time of start-up, the protrusion 2 formed on the sector gear 25 to prevent the reverse rotation.
5c (see FIG. 4) fits. With this configuration, when the rotor 11 rotates in the reverse direction, the induction rotating body 16 that follows the rotor 11 rotates in the reverse direction, which is opposite to the normal direction, and when the fan gear 25 rotates in the opposite direction to the normal direction, the protrusion 25c Fit into the recess 11k. As a result, the rotor 11 is temporarily locked, and immediately after that, the rotor 11 is converted into forward rotation by a recoil at the time of collision.

The induction rotating body 16 has a nonmagnetic conductive ring 16a made of copper or the like disposed on the outermost periphery thereof, and a magnetic material (specifically, iron or the like) inside the nonmagnetic conductive ring 16a. The back yoke ring 16b is press-fitted and formed by insert molding with resin.

The non-magnetic conductive ring 16a disposed on the outermost periphery of the induction rotating body 16 configured as described above is a ring-shaped magnet 11c attached to the rotor 11 described above.
Are arranged facing inward in the radial direction. The non-magnetic conductive ring 16a is a member that rotates following the ring-shaped magnet 11c as described above, and is formed of a non-magnetic and conductive non-magnetic guiding member, specifically, a metal such as copper or aluminum. It is comprised by the member which was done.

As a result, a magnetic induction force is generated in the ring-shaped magnet 11c to rotate the non-magnetic conductive ring 16a, and the induction rotor 16 with the non-magnetic conductive ring 16a fixed to the outer peripheral surface follows the rotation of the rotor 11. And rotor 1
Rotate in the same direction as 1. That is, the above-described ring-shaped magnet 11c and the induction ring 16a serve as magnetic induction rotating means for rotating the induction rotating body 16 with respect to the rotor 11 by magnetic induction.
Is a rotating body that is driven and rotated by the rotor 11 by magnetic induction.

On the other hand, the magnetic back yoke ring 16b disposed inside the non-magnetic conductive ring 16a is disposed so as to sandwich the non-magnetic conductive ring 16a with the ring-shaped magnet 11c. With this configuration, many magnetic fluxes pass between the ring-shaped magnet 11c and the back yoke ring 16b to form a magnetic path. for that reason,
Non-magnetic conductive ring 16 by ring-shaped magnet 11c
The magnetic induction force of a is strengthened. As a result, the reliability of the operation of the induction rotating body 16 is improved, and the reliability of the operation of the clutch operation mechanism 5 described later is improved.

As shown in FIG. 2, in this embodiment, the induction rotating body 16 is connected to the thrust bearing 1 of the rotor 11.
When the thrust is received by 1e, the magnetic center C2 of the back yoke ring 16b in the thrust direction is shifted slightly above the magnetic center C1 of the ring-shaped magnet 11c in the thrust direction. Therefore, the induction rotating body 16 to which the back yoke ring 16b is attached is attracted by the magnetic force of the ring-shaped magnet 11c and is pulled toward the thrust bearing 11e. As a result, the induction rotating body 16 rotates with good positional accuracy while being slightly biased toward the thrust bearing 11e.

In this embodiment, the magnetic center C2 of the back yoke ring 16b and the ring magnet 11
By making the magnetic center C1 incongruent (shifting) with the magnetic center C1, the guide rotating body 16 is slightly biased toward the thrust bearing portion 11c to improve the rotational position accuracy of the guide rotating body 16. The two magnetic centers C1 and C2 may be matched. This makes it possible to reduce the thrust pressure on the thrust bearing 11e while improving the positional accuracy to some extent.

In the present embodiment, the ring-shaped magnet 11 is provided on the rotor 11 which is one of the magnetic induction rotating means.
Although the non-magnetic conductive ring 16a is mounted on the induction rotating body 16 side which is the other of the magnetic induction rotating means, the ring-shaped magnet 11c and the non-magnetic conductive ring 16a may be arranged in reverse. That is, a nonmagnetic conductive ring may be attached to the rotor side, and a ring-shaped magnet may be attached to the induction rotating body side. Also in this case, the non-magnetic conductive ring attached to the rotor is arranged so as to be sandwiched between the ring-shaped magnet and the back yoke ring. Specifically, assuming that the nonmagnetic conductive ring 16a is mounted at the position of the ring-shaped magnet 11c in FIG. 2, the back yoke ring 16b is mounted outside the nonmagnetic conductive ring 16a in FIG.

Next, a drive train 2 for transmitting the driving force of the AC motor 1 to the output shaft 3 and a clutch operating mechanism 5 for switching the first clutch means disposed in the drive train 2 will be described. This will be described with reference to FIGS.

The drive wheel train 2 is described in the right half of FIG. 1 which is an expanded sectional view, and includes a clutch pinion 21, a planetary gear mechanism 22 having a receiving gear 32 b engaged with the clutch pinion 21, and It comprises a transmission gear 23 receiving the rotational force of the planetary gear mechanism 22 and an output shaft 3 having an output gear portion 3a meshed with the transmission gear 23. The drive train 2 reduces the rotation of the rotor 11 to reduce the output shaft 3
The transmission has a reduction gear train.

Each part constituting the drive wheel train 2 will be described in more detail. As described above, the clutch pinion 21 serving as the first gear of the drive train 2 is arranged coaxially with the rotor 11. That is, the clutch pinion 21
The rotor 11 is rotatably and loosely fitted to the rotor shaft 15, and the lower surface thereof is opposed to the upper end surface of the rotor 11. On the lower end surface of the clutch pinion 21, a claw 21d is formed which is detachable from a claw 11d formed on the upper end of the rotor 11. Further, the clutch pinion 21 is connected to the compression coil spring 1.
8, and is urged upward in FIG. 1 by the spring urging force of the compression coil spring 18.

The cam surface 41a of the clutch lever 41 faces the upper end of the clutch pinion 21.
Therefore, the clutch pinion 21 is constantly pressed against the cam surface 41a by the urging force of the compression coil spring 18. The cam surface 41a is provided with
It is composed of c and a valley portion. One end of the clutch lever 41 is rotatably supported on a shaft supporting the transmission gear 23. The other end of the clutch lever 41, that is, the side having the cam surface 41a,
b (see FIG. 4), and the rotor shaft 15
Are fitted and swing only in a predetermined range.

Further, the clutch lever 41 has an operation projection 41e (see FIG. 1) which enters into the clutch lever operation groove 3b formed on the side facing the output gear portion 3a. Therefore, when the rotational force of the rotor 11 is transmitted to the output gear portion 3a or the output shaft 3 rotates in either direction due to a load, the operation projection 41e is guided to the clutch operation groove 3b, and thereby the clutch lever 41 is rotated. Rotates. That is, the clutch lever 41 is configured to perform the switching operation of the second clutch means 4 by switching between the peak and the valley of the cam surface 41a in accordance with the rotation angle of the output shaft 3. Have been.

The depressing portion 41c holds the clutch pinion 2 between the initial state where no power is supplied and the time when power is supplied and the lever 8 is pulled up to a predetermined position.
1 is pushed down to the rotor 11 side. Thereby, the claw 21d of the clutch pinion 21 and the claw 11d of the rotor 11 are engaged, and the rotor 11 and the clutch pinion 21 rotate integrally. That is, the second clutch means 4 is in the engaged state.

When the output gear portion 3a has completed the predetermined rotation, the clutch lever 41 is rotated by the guidance of the clutch lever operation groove 3b, and the peak and the valley of the cam surface 41a are switched. As a result, the clutch pinion 21 moves upward due to the spring biasing force of the compression coil spring 18, and the connection between the clutch pinion 21 and the rotor 11 is released. That is, the second clutch means 4 switches to the disconnected state.

As a result, the connection between the rotor 11 and the output shaft 3 is disconnected. For this reason, each gear constituting the drive train 2 tends to rotate in the opposite direction under the load of the lever 8. However, as described above, the rotation of the clutch lever 41 causes the blocking member provided on the lower surface portion of the clutch lever 41 to enter into the rotation locus of an engagement protrusion (not shown) provided on the upper portion of the clutch pinion 21. Then, the clutch pinion 21 is locked. For this reason, the sun gear 32 of the planetary gear 22 engaged with the clutch pinion 21 is locked. Further, in addition to this state, the ring gear 33 is also locked by the magnetic induction force. As a result, each gear of the drive train 2 is locked, and does not rotate in the opposite direction even when receiving the load force of the lever 8.

When the power supply to the AC motor 1 is cut off,
The guide gear 25 is returned by the urging force of the spring member 39, and the clutch gear 27
Is disengaged from the rotation restricting portion 26 of the sector gear 25. As a result, the clutch gear 27 becomes free, and as a result, the ring gear 33 of the planetary gear mechanism 22 becomes free. As a result, each gear constituting the drive train 2 is rotated in the direction in which the lever 8 is pulled out by the load force of the lever 8, that is, in the direction opposite to the direction in which the motor is driven. During the reverse rotation, the clutch lever 41 rotates to the position before the lever 8 is pulled up, following the reverse rotation of the output gear portion 3a in the drive wheel train 2. Thereby, the clutch lever 41
The peak and the valley of the cam surface 41a are switched. As a result, the push-down portion 41c of the clutch lever 41 pushes down the clutch pinion 21 toward the rotor 11, and the second clutch means 4 is engaged. However, since the first clutch means is disconnected, the lever 8 is pulled up. You can move to the previous position.

The planetary gear mechanism 22 includes a sun gear 32 having a receiving gear 32b that meshes with the clutch pinion 21 and receives driving force from the rotor 11 and a transmission gear 32a that transmits driving force to the planetary gear 36. A ring gear 33 having an inner peripheral gear portion 33a meshing with the planetary gear 36 and an outer peripheral gear portion 33b meshing with the speed increasing gear 28 at the final portion of the clutch operating mechanism 5, and a bearing for rotatably supporting the planetary gear 36, respectively. The planetary gear support gear 34 includes a plate 34a and a pinion 34b that meshes with the transmission gear 23.

For this reason, the operation of each member of the clutch operating mechanism 5 is stopped by engaging between the rotation restricting portion 26 of the sector gear 25 and the clutch gear 27 so that the speed increasing gear 2
When the rotation of the ring gear 33 meshing with the gear 8 is stopped, the connection between the sun gear 32 and the planetary gear supporting gear 34 is in a connected state,
Rotational force of the rotor 11 transmitted to the sun gear 32 via the clutch pinion 21 is transmitted to the output gear portion 3a via the transmission gear 23 meshing with the planetary gear support gear 34, and the output shaft 3 is connected to the slider pinion. 7 to rotate. As a result, the lever 8 including the slider gear (not shown) meshing with the slider pinion 7 is pulled up by the driving force of the AC motor 1 against the load imposed on the lever 8 itself.

On the other hand, the clutch operating mechanism 5 is for performing disconnection of the first clutch means disposed in the drive train 2 described above. That is, the clutch operating mechanism 5 is described in the left half of FIG. 1 which is an exploded cross-sectional view. A fan gear 25 serving as a rotating member urged in a direction of disengaging from the clutch gear 27 by a member 39
And a clutch gear 2 provided on its outer peripheral surface with an engagement projection 27a which is detachable from a rotation regulating portion 26 formed on the sector gear 25.
7 and a speed increasing gear 28 meshing with the small diameter gear 27b of the clutch gear 27 and meshing with the ring gear 33 of the planetary gear mechanism 22. Planetary gear mechanism 22
Is meshed with the speed increasing gear 28 which is a part of the reduction gear train in the drive wheel train 2 and is the final part of the clutch operating mechanism 5 as described above, and is switched by a predetermined operation of the clutch operating mechanism 5. This is the first clutch means for performing the following.

The clutch operating mechanism 5 is provided with the AC motor 1
At the time of energization, the rotation restricting portion 26 is moved to a predetermined position by rotating the sector gear 25 against the urging force of the spring member 39 using magnetic induction, and the rotation restricting portion 26 and the clutch gear 27 are engaged. It is configured to match.
Then, by this engagement, the operations of the members constituting the clutch operation mechanism 5 up to that point are locked. Then
In the planetary gear mechanism 22 serving as the first clutch means, the rotation of the ring gear 33 is locked, and the connection between the sun gear 32 and the planetary gear support gear 34 is established.

In the state where the sun gear 32 and the planetary gear supporting gear 34 are connected as described above, when the second clutch means 4 is also connected, the rotation of the rotor 11 is changed to the planetary state. The light is transmitted to the output shaft 3 via the sun gear 32 and the planetary gear 34 of the gear mechanism 22. As a result, the lever 8 performs the winding operation, and the clutch lever 41 rotates in conjunction with this operation. After the winding operation is completed, only the second clutch means 4 is disconnected, and the first clutch means maintains the engaged state. Thus, the gears constituting the clutch operating mechanism 5 are kept locked by the magnetic induction force. As a result, the clutch lever 41 rotated as described above is locked in a state where the clutch lever 41 is rotated to the position where the clutch pinion 21 is locked. For this reason, as described above, the lever 8 is held at the winding position.

In this state, the power supply to the AC motor 1 is further cut off, and when the magnetic induction force between the rotor 11 and the induction rotating body 16 almost disappears, the fan gear 25 is moved to the spring member 39.
Due to this spring force, the rotation is reversed in the direction opposite to the direction described above, and the engagement between the rotation restricting portion 26 and the clutch gear 27 is released. Thereby, the locked state of each part of the clutch operation mechanism 5 is released. For this reason, the ring gear 33 and the planetary gear supporting gear 34 are disconnected, and the rotational force of the output shaft 3 which is about to reversely rotate due to an external load is transmitted so as to reverse the driving wheel train 2, and the planetary gear mechanism 22 and Speed-up gear 28
Through the clutch gear 27 and the clutch gear 2
7 rotates freely. As a result, the holding state of the lever 8 is released regardless of whether the sun gear 32 is locked.

The components constituting the clutch operating mechanism 5 will be described in further detail.

A pin 38 erected on the motor case 13 is provided at the tip of a turning power applying portion 25b extending from the fulcrum portion 25a of the fan gear 25 to the opposite side of one side of the fan.
The other end of the spring member 39 whose one end is fixed is fixed. The fan gear 25 is driven by the biasing force of the spring
A rotating force is applied to rotate in a direction opposite to the rotation by the forward rotation of the motor 1 (the direction indicated by the arrow A in FIG. 4). However, since the rotation torque of the induction rotating body 16 that rotates following the rotor 11 of the AC motor 1 exceeds the driving torque of the spring member 39, when the induction rotating body 16 rotates following the rotor 11, the spring member Fan gear 2 against the spring force of 39
Numeral 5 rotates in the direction opposite to the arrow A direction.

As described above, the engagement between the rotation restricting portion 26 and the clutch gear 27 is released by the urging force of the spring member 39 when the power supply to the AC motor 1 is cut off. A member (not shown) still keeps the rotation of the clutch pinion 21 from rotating, whereby the sun gear 3 meshed with the clutch pinion 21 is rotated.
2 rotation is blocked. However, since the engagement between the rotation restricting portion 26 and the clutch gear 27 is released,
Even if the rotation of the sun gear 32 is prevented, the rotational force due to the load force of the lever 8 is transmitted to the speed increasing gear 28 via the planetary gear mechanism 22, causing the clutch gear 27 to idle. As a result, the lever 8 is pulled out of the case, and accordingly, each gear constituting the drive train 2 rotates in the opposite direction.

Although the above-described embodiment is an example of a preferred embodiment of the present invention, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the present invention. is there. For example, as described above, in the first embodiment, the ring-shaped magnet 11c is attached to the rotor 11, and the nonmagnetic conductive ring 16a is attached to the induction rotating body 16 side.
Although the back yoke ring 16b is attached, the back yoke ring 16b may be attached to the rotor side, and the back yoke ring may rotate integrally with the rotor.

This example will be described as a second embodiment with reference to FIG. Except for the configuration of the rotor and the rotating conductor, the configuration is the same as that of the above-described first embodiment, and thus the description is omitted. In addition, in the following description, when describing the components other than the rotor and the rotating derivative, the first component described above is used.
The code used in the embodiment is used.

As shown in FIG. 5, the rotor 51 is fixed to a rotary support portion 51a having a hole through which the rotor shaft 15 is inserted, and the upper end of the rotary support portion 51a is projected upward. Substantially ring-shaped rotor magnet 51b
And the rotor magnet 5 outside the rotation bearing 51a.
It has a back yoke ring 51g attached to a position inside 1b. Also, the rotor magnet 51
A ring-shaped magnet 51c that rotates in conjunction with the rotor 51 is fitted on the surface on the inner peripheral space side of b. In addition,
This ring-shaped magnet 51c may be integrated with the rotor magnet 51b as in the first embodiment described above.

An induction rotating body 56 is rotatably arranged inside the rotor magnet 51b. The induction rotating body 56 has a non-magnetic conductive ring 56a to which a flange portion is attached near the upper end of a cylindrical portion 56c serving as a rotation center. The non-magnetic conductive ring 56 is arranged in a gap inside the ring-shaped magnet 51c and outside the back yoke ring 51g.

A gap is provided between the non-magnetic conductive ring 56a and the back yoke ring 51g (see reference numeral G in FIG. 5). This gap G is similar to that of the first embodiment. Is disposed. Therefore, the operation of the clutch operation mechanism 5 can be further stabilized. In addition, in the second embodiment, a gap is formed between the nonmagnetic conductive ring 56a and the ring-shaped magnet 51c (see reference numeral G1 in FIG. 5). It may be arranged. However, if the viscous body is arranged only in the gap G, there is an effect that the viscous body hardly scatters to the outside from the space separated from the outside by the rotor 51 and the induction rotating body 56.

Each of the above embodiments is an example of a preferred embodiment of the present invention. However, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the present invention. . For example, in each of the above embodiments, the ring-shaped magnets 11c and 51c are provided integrally with the rotors 11 and 51, and the ring-shaped magnets 11c and 51c are provided.
The magnetic induction rotating means including the magnetic induction rotating means and the non-magnetic conductive rings 16a and 56a is arranged coaxially with the rotors 11 and 51. It may be arranged at another position in the train wheel.

In each of the above embodiments, the fan gear 25 is urged by the urging force of the spring member 39 in the direction opposite to the driving direction utilizing magnetic induction. It is not necessary to adopt a configuration that energizes. In addition, instead of using the spring member 39 as an urging means, an elastic material such as rubber may be used.

Further, the spring member 39 is constituted by a shape memory spring configured so that the spring constant is reduced by heat generation.
In the vicinity of the shape memory spring, the rotor 1 is moved by magnetic induction.
A heat-generating member that generates heat when transmitting the rotation power of 1, 51 to the fan gear 25 may be provided. With this configuration, when the fan gear 25 is rotated against the urging force of the shape memory spring, the spring force is reduced due to the heating action of the heating member. Can be done with light power. On the other hand, when the rotation of the rotor 11 is stopped and the fan gear 25 is returned by the spring member 39, the spring force is restored by not generating heat, and the returning operation of the fan gear 25 to the original position can be performed with a strong force. As a result, even if an induction magnet having a weak magnetic force is used, the spring force of the spring member 39 is unlikely to hinder the rotation operation due to the magnetic induction, and the operation in both directions can be performed smoothly and reliably. The operation of the mechanism 5 can be assured.

The shape memory spring may have a low spring constant when there is no heat generation effect, and the spring constant may be improved by the heat generation effect. When such a spring is used, heat is generated when the fan gear 25 is rotated by the spring force. Conversely, when the fan gear 25 is rotated via the magnetic induction force against the spring force, heat is generated. Since the magnetic induction can be performed with a light force by configuring such that no induction magnet is used, an induction magnet having a weak magnetic force can be used.

In each of the above embodiments, the rotor 1
A first operation for lifting the lever 8 serving as a load member, a second operation for holding the lever 8 at the raised position, and a third operation for returning the lever 8 to the initial position from this state. , But the number of clutch means may be one. Further, the clutch means does not have to use a planetary gear mechanism. INDUSTRIAL APPLICABILITY The present invention is applicable to all geared motors provided with magnetic induction rotating means provided with a back yoke ring in a clutch operating mechanism for disconnecting the clutch means.

In each of the above embodiments, the rotation of the ring gear 33 is stopped, the sun gear 32 and the planetary gear support gear 34 are connected, and the rotational force of the AC motor 1 is transmitted to the output gear 3a. It is configured as follows. However, the configuration may be such that the rotation of the planetary gear supporting gear 34 is stopped, the sun gear 32 and the ring gear 33 are connected, and the rotational force of the AC motor 1 is transmitted to the output gear section 3a.

In each of the above embodiments, the output shaft 3
The rotation of the slider pinion 7 connected to the lever 8 is transmitted to the lever 8, and the lever 8 is slid. However, the lever member is directly connected to the output shaft 3, and the wire is pulled by rotating the lever member. Other configurations such as a simple configuration may be adopted.

[0074]

As described above, according to the present invention,
Since the nonmagnetic conductive ring is sandwiched between the back yoke ring and the ring-shaped magnet, the magnetic induction force for rotating the nonmagnetic conductive ring to follow is strong. For this reason, the rotating body to which the nonmagnetic conductive ring is attached reliably rotates following the rotating body to which the ring-shaped magnet is attached, thereby ensuring the operation of the clutch operating mechanism for disconnecting the clutch means. It becomes something.

[Brief description of the drawings]

FIG. 1 is a developed vertical sectional view for explaining an internal mechanism of a geared motor according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a rotor to which a ring-shaped magnet serving as a main part of the geared motor of FIG. 1 is attached, and an induction rotating body to which a non-magnetic conductive ring is attached.

FIG. 3 is a plan view of FIG. 2 as viewed from the direction of arrow III.

FIG. 4 is a plan view showing a state in which a cover and a case upper cover are removed from the geared motor of FIG. 1;

FIG. 5 is a cross-sectional view showing a rotor to which a ring-shaped magnet serving as a main part of a geared motor according to a second embodiment of the present invention is attached and an induction rotor to which a non-magnetic conductive ring is attached.

[Explanation of symbols]

 Reference Signs List 3 output shaft 5 clutch operating mechanism 11 rotor (rotating body) 11b rotor magnet 11c ring-shaped magnet 11e thrust receiver 16 induction rotating body 16a nonmagnetic conductive ring 16b back yoke ring 22 planetary gear mechanism (clutch means) 25 fan gear (turn) Moving member) 39 spring member C1, C2 magnetic center G gap

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Noriyuki Akabane 5329 Shimosuwa Town, Suwa County, Nagano Prefecture Inside Sankyo Seiki Seisakusho Co., Ltd. (72) Inventor Shunji Matsushima 5329 Shimo Suwa Town, Suwa County, Nagano Prefecture Sankyo Seiki Seisakusho Co., Ltd. F term (reference) 5H607 AA00 BB01 BB07 BB14 CC03 EE03 EE18 EE33 EE36

Claims (9)

[Claims] An output shaft connected to the rotor and driven to rotate, a clutch means for connecting and disconnecting the output shaft and the rotor, and a clutch operating mechanism for connecting and disconnecting the clutch means; The clutch operating mechanism includes one of a ring-shaped magnet or a non-magnetic conductive ring that rotates in conjunction with the rotor, the other that rotates following the one by magnetic induction, and the ring-shaped magnet that rotates the non-magnetic conductive ring. And a back yoke ring made of a magnetic material disposed at a position interposed between the clutch and the clutch means in conjunction with the other rotating following the magnetic member. 2. The non-magnetic conductive ring according to claim 1, wherein the back yoke ring is attached to a rotating body to which the non-magnetic conductive ring is attached, and is configured to rotate integrally with the non-magnetic conductive ring. A geared motor as described. 3. The magnetic center of the ring-shaped magnet in the thrust direction and the magnetic center of the back yoke ring in the thrust direction are set so as to coincide with or not coincide with a predetermined position. 2. The geared motor according to 2. 4. The back yoke ring is attached to a rotating body to which the ring-shaped magnet is attached,
The geared motor according to claim 1, wherein the geared motor is configured to rotate integrally with the ring-shaped magnet. 5. A gap is formed between the non-magnetic conductive ring and the back yoke ring or between the non-magnetic conductive ring and the ring-shaped magnet, and a viscous body is disposed in the gap. The geared motor according to claim 4, wherein: 6. The non-magnetic conductive member opposing via the gap in an operation of switching the clutch means from disengagement to engagement and an operation of switching the clutch means from engagement to disengagement. The relative speed of the ring and the back yoke ring or the nonmagnetic conductive ring and the ring-shaped magnet is configured to be different from each other. The geared motor according to claim 5, wherein the geared motor is configured as follows. 7. The ring-shaped magnet according to claim 1, wherein the ring-shaped magnet is attached to the rotor and is formed as a magnet separate from a rotor magnet of the rotor. Geared motor. 8. A rotor having the non-magnetic conductive ring attached thereto is disposed at a position radially overlapping with the rotor, and a bearing portion of the rotor having the non-magnetic conductive ring attached is provided on the rotor, and The geared motor according to any one of claims 1 to 7, wherein a viscous body is attached to the bearing portion. 9. A rotating member urged in one rotation direction by a spring member in the clutch operation mechanism, and the rotating member receives the driving force of the rotor and receives the ring-shaped magnet and the rotating magnet. One of the non-magnetic conductive rings rotates at a high speed and the other follows the other, thereby rotating in the other rotational direction against the urging force of the spring member, and the ring-shaped magnet and the non-magnetic conductive ring. When one of the rings rotates or stops at a low speed and the other following rotation stops at a low speed or stops, the ring is configured to rotate in one rotation direction by the urging force of the spring member. It is set so as to generate heat when rotated in the other rotation direction against the biasing force of the spring member or when rotated in one rotation direction by the biasing force of the spring member. The generated heating member is disposed in the vicinity of the spring member, and the spring force of the spring member changes between when the heating member generates heat and when the heating member does not generate heat, and the spring force opposes the spring force of the spring member. The geared motor according to any one of claims 1 to 8, wherein the geared motor is configured by a shape memory spring set to be weak when the rotating member is rotated.