JP2001352713A - Geared motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a geared motor which can use a magnetic induction system as a clutch means, reduce sliding noise at the time of driving the wind-up operation and also realize reduction in size. SOLUTION: In the geared motor comprising a motor 1, an output shaft 3 which is coupled with a rotor 11 of this motor 1 and is driven to rotate, a clutch means 4 for intermitting the coupling between the output shaft 3 and the rotor 11 and a clutch operation mechanism 5 for intermitting the clutch means 4, the clutch operation mechanism 5 includes a magnetic induction rotary body 16 which is rotated followed by the rotor 11 with the magnetic induction of a magnet 11c arranged in the rotor 11 and mounted to the rotor 11, and controls intermitting of the clutch means 4 by making use of rotation of the magnetic induction rotary body 16.

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.

[0003] As an example of the above-mentioned clutch,
What is called an electromagnetic clutch is used. The electromagnetic clutch connects the wheel train between the rotor and the output shaft by the force of the energized solenoid when the motor is wound and held. Thereby, at the time of winding, the load member is wound by transmitting the motor driving force to the output shaft. When the winding operation is completed, the rotation of the rotor is stopped by turning off the power to the motor, and the load member is held in a state of being wound by the detent torque of the rotor in the rotation stopped state. That is, at this time, since the energization of the solenoid is continued, the clutch is engaged, and the load of the load member can be held by the detent torque of the rotor. On the other hand, when the power supply to the solenoid is cut off from this holding state, the connection of the wheel train between the rotor and the output shaft is cut off, whereby the detent torque of the rotor becomes ineffective on the output shaft side and the load member tries to return. The applied load returns the load member to its original position.

[0004] It has been proposed to use an electromagnetic clutch different from the solenoid type (see Japanese Patent Application Laid-Open No. 3-198638). Japanese Patent Application Laid-Open No. 3-19863
In the method of the device described in No. 8, a permanent magnet and an induction ring are arranged opposite to each other in a reduction gear train connecting the rotor and the output shaft, and the induction ring rotates following the permanent magnet by magnetic induction. Is used to operate an operation piece for performing clutch switching. Compared to the solenoid type, this magnetic induction type device eliminates the need for a switch to cut off the current to the motor when the load member is wound up to a predetermined position by the driving force of the motor, and a solenoid for clutch switching. Becomes unnecessary.

[0005]

As described above, the advantage of the geared motor having the magnetic induction type clutch is that a switch for cutting off the power supply to the motor is not required, and the solenoid and the solenoid are used. The point is that a clutch mechanism is not required. However, the geared motor described in the above-mentioned Japanese Patent Application Laid-Open No. 3-198638 has an electromagnetic clutch portion in which 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. As a result, the number of wheel trains increases, and noise at the time of meshing of the gears becomes a problem. In addition, there is a problem that the size of the apparatus is increased due to the extra train wheel.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a geared motor which uses a magnetic induction system as a clutch means, and which can reduce sliding noise at the time of a hoisting drive or the like and which can be downsized.

[0007]

In order to achieve the above object, the present invention provides a motor, an output shaft connected to a rotor of the motor and driven to rotate, and disconnecting the connection between the output shaft and the rotor. In a geared motor having a clutch means for engaging and disengaging the clutch means, the clutch operation mechanism is either a magnet or a non-magnetic conductor arranged in the rotor and rotating integrally with the rotor. One has a magnetic induction rotating body formed integrally with the other of a magnet or a non-magnetic conductor that is arranged in the rotor and rotates following the rotor by magnetic induction, and utilizes the rotation of this magnetic induction rotating body. Then, the clutch means is disconnected.

In the above invention, the clutch means is disconnected by utilizing a magnetic induction force generated between a magnet or a non-magnetic derivative disposed in the rotor and a magnetic induction rotating body disposed opposite to this member. . More specifically, by raising the member by energizing the motor, and continuing the state of generating the magnetic induction force by continuing the energization, the member can be held at the raised position. I have. Note that the magnetic induction rotating body that generates such an action is disposed in the rotor. Therefore, unlike a conventional magnetic induction type geared motor, there is no need to arrange a magnet and a magnetic derivative in a wheel train disposed between the motor rotor and the output shaft, and the wheel train is minimized. This makes it possible to reduce noise at the time of hoisting drive or the like. Further, since there is no need to dispose the magnet and the magnetic derivative in the wheel train, a space is provided in the outer portion of the motor, and this space can be used effectively. It also contributes to downsizing.

[0009] Further, another invention provides, in addition to the above-mentioned invention,
The clutch means is constituted by a planetary gear mechanism including a planetary gear supporting gear for supporting the planetary gears, and a sun gear and a ring gear meshing with the planetary gears. By preventing the rotation of any one of the planetary gear supporting gears, the rotation of the rotor is transmitted to the output shaft via the other two gears.

[0010] Therefore, the clutch means fits in the wheel train compactly, and the entire wheel train disposed between the rotor and the output shaft is reduced in size. Accordingly, the size of the entire apparatus is reduced. Further, since the entire wheel train is locked by preventing rotation of any one of the sun gear, the ring gear and the planetary gear, the degree of freedom of the wheel train design can be increased. Becomes

[0011] Further, another invention provides, in addition to the above-described invention,
The planetary gear supporting gear is connected to the output shaft side, and the planetary gear mechanism is used as a reduction mechanism. Therefore, the planetary gear mechanism has both a function as a clutch and a function as a reduction mechanism, and the entire wheel train has a compact configuration.

[0012] In addition, another invention provides, in addition to the above-described invention,
Second clutch means for connecting and disconnecting the output shaft and the rotor is provided between the rotor and the planetary gear mechanism serving as the first clutch means, and the rotor is rotated with the second clutch means disconnected. In this way, either the ring gear or the sun gear is locked by utilizing the rotation of the magnetic induction rotating body, and in the locked state, the other of the ring gear or the sun gear which is about to reversely rotate by an external load imposed on the output shaft. Is further provided with a reverse rotation preventing mechanism. That is, by a simple method of locking both the ring gear and the sun gear at the same time by another means, it is possible to prevent reverse rotation of the output shaft due to an external load, and to reliably hold the output shaft at the winding position.

[0013] Further, another invention provides, in addition to the above-described invention,
The second clutch means includes: a rotor; a clutch pinion that can be disconnected from the rotor by operating vertically in the axial direction;
A spring member disposed between the rotor and the clutch pinion, and a gear disposed between the planetary gear mechanism and the output shaft, operate in conjunction with a gear disposed between the spring member and the clutch pinion. The rotor and the clutch pinion are lowered by resisting the spring force to join the rotor and the clutch pinion, and operate in conjunction with the gear to raise the clutch pinion by the spring force of the spring member to disconnect the rotor and the clutch pinion. And a clutch lever. As described above, the clutch pinion that moves vertically in the axial direction is moved up and down by the clutch lever independent of the wheel train, so that the second clutch means is disconnected, so that the assemblability is improved.

[0014] Further, another invention provides, in addition to the above-mentioned invention,
When the gear disposed between the planetary gear mechanism and the output shaft reversely rotates due to an external load imposed on the output shaft, the second clutch means is connected to the disconnection with the reverse rotation. As described above, the second clutch means does not require a power supply for switching operation in particular, and is brought into connection with the reverse rotation of the gear, thereby avoiding the complexity of the device and contributing to downsizing. Becomes

[0015] Further, another invention provides, in addition to the above-described invention,
When the drive of the motor is stopped and the rotation of the magnetic induction rotating body is stopped, the magnetic induction rotating body has lock release means for disconnecting the ring gear or the sun gear, and the connection is released by the lock release means. The output shaft is reversely rotated by an external load. As described above, the output shaft is reversely rotated by the external load only by stopping the driving of the motor, so that the output shaft can be returned from the holding position to the open position with a simple configuration.

[0016]

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

FIG. 1 is a diagram for explaining the internal mechanism of the geared motor according to the present embodiment, and is a developed cross-sectional view particularly showing the relationship between the gears constituting the drive train in detail. FIG. 2 is a plan view of the geared motor shown in FIG. FIG. 3 is a plan view showing a state in which a cover for covering the lever and a case top cover for covering the drive mechanism are removed. FIG. 4 is a plan view showing the drive mechanism with the case body and the like further removed from FIG.

The geared motor according to the embodiment of the present invention
Mainly, a motor 1 serving as a drive source, a drive train 2, an output shaft 3 which is connected to a rotor 11 of the motor 1 via the drive train 2 and is driven to rotate, and the output shaft 3 and the rotor 11 Planetary gear mechanism 22 serving as first clutch means for disconnecting connection
A clutch operating mechanism 5 for disengaging the first clutch means; an output shaft 3 and a rotor 11 arranged in the drive train 2;
And a second clutch means 4 for disconnecting the connection with the second clutch means.

In this geared motor, the driving force of the motor 1 is transmitted to the output shaft 3 by connecting the second clutch means 4 (meaning that the connection is established = on). By rotating the slider pinion 7, which is press-fitted and fixed to the lever, the lever 8 to which a predetermined load is imposed is pulled. Then, the connection between the rotor 11 and the output shaft 3 is cut off by turning off the second clutch means 4 (meaning that it is turned off = off), and the drive wheels are prevented by a reverse rotation preventing mechanism (not shown). By preventing the row 2 from rotating in the opposite direction (meaning the direction opposite to pulling up the lever 8), the lever 8 is held at a position after the lever 8 has been pulled up to a predetermined position.
This state is achieved by maintaining the power supply to the motor 1. Further, from this state, the power supply to the motor 1 is further stopped to promote the rotation of the driving wheel train 2 in the reverse direction, and the lever 8 is raised to the position before being raised by the load imposed on the lever 8 itself. I am going to put it back.

Hereinafter, a configuration for realizing the operation will be described in detail. The case body 12 that houses the drive mechanism unit composed of the motor 1 and the drive wheel train 2 includes a case body 12
a and an upper case lid 12b which is put on the case main body 12a and fastened to the case main body 12a with three tapping screws 12c. Further, as shown in FIG. 2, the cover 12d arranged to cover the lever 8 arranged on the case upper lid 12b also uses two of the three tapping screws 12c described above. It is fixed to the case body 12a together with the upper lid 12b.

Note that the lever 8 is placed on the case upper lid 12b.
Are provided on both sides of the guide member 9 to guide the sliding operation of the lever 8. When the lever 8 is pulled out of the case by the load of the lever 8 itself, the guide member 9 contacts the end of the slider gear 8a of the lever 8 when the rotor 11 is excessively rotated for some reason. 8, the position is regulated at the end of the sliding operation. Also, this guide member 9
When the lever 8 is pulled up to a predetermined position by the driving force of the motor 1, when the rotor 11 is over-rotated for some reason, the lever 8 comes into contact with a load mounting portion 8c formed on the tip side of the lever 8, and Is regulated at the end of the slide operation. The guide member 9 is provided with the above-described slider gear 8a and load mounting portion 8c as long as normal operation is performed.
Not to abut.

The motor 1 serving as a drive source for operating the lever 8 is disposed on the bottom side in the case body 12. The motor 1 is a motor case 1 formed in a cup shape.
3, a stator portion 14 disposed on the inner periphery of the motor case 13, a rotor 11 disposed on the inner periphery of the stator portion 14 and a rotor shaft 15 rotatably supporting the rotor 11. ing. By supplying electric power to the coil 14a of the stator section 14, the rotor 11 rotates around the rotor shaft 15 as a rotation center. 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 motor 1 and having a bearing hole 12e formed in the case upper lid 12b. I'm stuck inside.

The rotor 11 has a rotary support portion 11a having a hole through which the rotor shaft 15 is inserted, and a substantially ring-shaped main body magnet portion fixed to the outer peripheral side of the rotary support portion 11a so that the upper end protrudes upward. 11b, and a ring-shaped magnet portion 11c fitted on the surface of the main body magnet portion 11b on the inner peripheral space side and rotating integrally with the main body magnet portion 11b. Note that, in the present embodiment, the ring-shaped magnet 11c is
However, the ring-shaped magnet 11c and the main body magnet 11b may be integrated.

The rotation bearing 11a is formed by resin molding. A claw 11d is formed at an upper end portion of the rotation bearing 11a. The claw 11d constitutes a part of the first path 2a of the drive wheel train 2 and a clutch pinion 21 which becomes a part of the second clutch means 4 as described later.
Engages with a claw 21d formed at the lower end of the clutch pinion 21 to transmit the rotational force of the rotor 11 to the clutch pinion 21. The state in which the pawls 11d and 21d are engaged and the rotational force of the rotor 11 is transmitted to the output shaft 3 via the clutch pinion 21 is referred to as the second clutch means 4.
Is in the state of succession. On the other hand, when these claws 11d and 21d are not engaged, the rotational force of the rotor 11 is reduced by the clutch pinion 21.
The state in which the rotational force of the rotor 11 is not transmitted to the output shaft 3 side is regarded as a state in which the second clutch means 4 is disconnected. That is, the claw 11d at the upper end of the rotor 11 and the claw 21d at the lower end of the clutch pinion 21,
A mechanism for engaging and disengaging 1d and 21d is the second clutch means 4.

At the inner peripheral side of the upper end of the rotation bearing 11a,
Compression coil spring 1 which is a part of second clutch means 4 for disconnecting rotor 11 and clutch pinion 21
8 is formed therein. Further, a guide step portion 11e for guiding a lower end portion of the guide pinion 16 constituting a part of the drive wheel train 2 is provided on an outer peripheral portion of an upper end of the rotation bearing portion 11a as described later. The guide pinion 16 is coaxially arranged above the rotor 11 by mounting a ring-shaped lower end portion on the guide step 11e.

Further, the main body magnet portion 11 of the rotor 11
An induction ring 16a is disposed on the inner peripheral side of the ring-shaped magnet 11c fitted on the inner peripheral side of b, and a back yoke ring 16b is disposed on an inner peripheral portion thereof.
The guide ring 16a and the back yoke ring 16b are integrally fixed to the outer peripheral portion of the guide pinion 16 formed by resin molding. The guide pinion 16 is coaxially mounted above the rotor 11 as described above, and is provided on the outside of the body 21b extending below the gear portion 21a of the clutch pinion 21 with the clutch pinion 2
1 is loosely fitted.

The guide ring 16a is a member for rotating the guide pinion 16 to follow the rotor 11 by a magnetic guide force. The guide ring 16a is a non-magnetic and conductive non-magnetic guide member, specifically, copper or aluminum. And the like. Therefore, when the rotor 11 rotates, an eddy current is generated between the induction ring 16a and the ring-shaped magnet 11c disposed opposite to the induction ring 16a. As a result, a magnetic induction force is generated in the ring-shaped magnet 11c of the rotor 11 to rotate the induction ring 16a, and the induction pinion 16 with the induction ring 16a fixed to the outer peripheral surface attempts to rotate following the rotation of the rotor 11. I do. The induction pinion 16 is a magnetic induction rotating body that rotates with the induction ring 16a integrally with the rotor 11 by magnetic induction.

In this embodiment, the ring-shaped magnet 11c is arranged on the rotor 11 side and the induction ring 16a is arranged on the induction pinion 16 side which is a magnetic induction rotating body. However, the ring-shaped magnet 11c and the induction ring 16a are arranged. May be reversed. That is, a non-magnetic and conductive ring member may be arranged on the rotor 11 side, and a magnet may be arranged on the induction pinion 16 side.

As described above, in the geared motor according to the embodiment of the present invention, the induction ring 16a, which is a part of the clutch operating mechanism 5 utilizing magnetic induction, is coaxially arranged on the inner peripheral portion of the rotor 11 of the motor 1. are doing. Therefore, it is not necessary to specially arrange a wheel train portion for generating the magnetic induction force in the drive wheel train 2 described below. Therefore,
Since there is no need to increase the number of gears in the drive train 2 unnecessarily, it is possible to reduce noise due to frictional noise between the gears forming the train. In addition, the space for arranging the drive train 2 can be widened, and the degree of freedom in designing this portion can be increased. On the other hand, the space can be saved and the device can be downsized. Becomes

Next, the driving wheel train 2 will be described. The drive train 2 is constituted by gears rotatably supported on a plurality of shafts each having both ends supported by a base plate formed by extending an upper end portion of a motor case 13 outward and a case upper cover 12b at both ends. I have. The drive wheel train 2 serves as a first path 2a for transmitting the rotation of the rotor 11 to the output shaft 3 via the clutch pinion 21, and as a first clutch means connected to the rotor 11 using magnetic induction. It comprises a second path 2b that extends to the planetary gear mechanism 22.

The second path 2b is a clutch operating mechanism 5 for connecting and disconnecting the planetary gear mechanism 22 as the first clutch means. The second path 2b is connected to the motor 1
At the time of energization, the clutch operation piece 26a to be described later is engaged with the clutch gear 27 using magnetic induction to stop the operation of each gear, and the first clutch means is connected. On the other hand, when the magnetic induction force is not generated at the time of non-energization, the engagement between the clutch operation piece 26a and the clutch gear 27 is released, and each gear can freely rotate, so that the first clutch means can be used. It is something to refuse.

The first path 2a of the driving wheel train 2 is shown in the right half of FIG. 1 which is an expanded sectional view, and is pushed down by the cam surface 41a of the clutch lever 41 against the spring force of the compression coil spring 18. The planetary gear mechanism 22 having a receiving gear 32b engaged with the clutch pinion 21; and a gear 23a receiving the rotational force of the planetary gear mechanism 22. The transmission gear 23 includes an output shaft 3 having an output gear portion 3a meshed with the transmission gear 23. The first path 2a is a reduction gear train for reducing the rotation of the rotor 11 and transmitting the reduced rotation to the output shaft 3. From the initial state where no power is supplied, the above-described lever 8 is pulled up to a predetermined position. Are connected between

On the other hand, the second path 2b of the driving wheel train 2 is described in the left half of FIG. 1 which is an expanded sectional view, and includes an induction pinion 16 that follows the rotation of the rotor 11 by a magnetic induction force, A fan gear 25 meshing with the gear portion of the guide pinion 16, a clutch operation piece 26 that rotates integrally with the fan gear 25, and an engagement projection 27 a detachable from the clutch operation piece 26 are provided on the outer peripheral surface. Clutch gear 27
And a planetary gear mechanism 22 including a speed increasing gear 28 meshing with the small diameter gear 27b of the clutch gear 27, and a ring gear 33 meshing with the small diameter gear 28b of the speed increasing gear 28. That is, the planetary gear mechanism 22 functions as a part of the reduction gear train on the first path 2a and the first clutch means disposed on the second path 2b.

The second clutch means 4 for disconnecting the connection between the output shaft 3 and the rotor 11 includes a rotor 11, a clutch pinion 21 for disconnecting from the rotor 11 by operating up and down in the axial direction, and And a clutch lever 41 having a cam surface 41a for moving the clutch pinion 21 up and down.

The components constituting the first path 2a will be described in more detail. As described above, the clutch pinion 21 serving as the first gear of the first path 2a is arranged coaxially with the rotor 11. That is, the clutch pinion 21 is loosely fitted to the rotor shaft 15 so as to be freely rotatable. In the clutch pinion 21, a body 21 b disposed below in FIG. 1 is inserted through the inner peripheral surface side of the guide pinion 16, and is disposed to face the upper end surface of the rotor 11. On the lower end surface of the body portion 21b of the clutch pinion 21, there is formed a claw 21d which is detachable from a claw 11d formed on the upper end of the rotor 11. In addition, a groove for fitting one end of the compression coil spring 18 is formed at the center of the lower end surface of the body 21b of the clutch pinion 21. With this configuration, the clutch pinion 21 is mounted on the rotor 11 with the compression coil spring 18 interposed therebetween, 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. One end of the clutch lever 41 has the transmission gear 23.
And the upper surface of this portion abuts against a bearing on which the shaft supporting the transmission gear 23 is fitted. Also, clutch lever 2
The other end of 1, that is, the side having the cam surface 41 a, is swingably supported by the rotor shaft 15, and the upper surface of this portion is in contact with a bearing on which the rotor shaft 15 is fitted. . The cam surface 41a of the clutch lever 41
The side provided with a long hole 41b that is loosely fitted to the rotor shaft 15.
(See FIG. 3), and the clutch lever 41
The shaft rotates about a shaft supporting the transmission gear 23 in a range where the end of the inner peripheral surface of the elongated hole 41b does not hit the rotor shaft 15.

Further, the clutch lever 41 has an operation projection 41e (see FIG. 1) which enters into the clutch lever operation groove 3b formed on one surface of the output gear portion 3a. For this reason, when the rotational force of the rotor 11 is transmitted from the clutch pinion 21 to the output gear portion 3a via the planetary gear mechanism 22 and the transmission gear 23, and the output shaft 3 makes a predetermined rotation (the lever 8 is pulled up by this rotation). ,
The operation projection 41e is guided by the clutch operation groove 3b, whereby the clutch lever 41 rotates. That is, the clutch lever 41, which is a main member of the second clutch means 4, is a member independent of the planetary gear mechanism 22, and performs the switching operation depending on the rotation angle of the output shaft 3. It is configured.

The cam surface 41a has a push-down portion 41c that pushes down the clutch pinion 21 against the urging force of the compression coil spring 18. The push-down portion 41c pushes down the clutch pinion 21 toward the rotor 11 from the initial state in which the power is not supplied to the time when the power is supplied and the lever 8 is pulled up to a predetermined position. Thus, the clutch lever 41
When the cam surface 41a pushes down the clutch pinion 21 toward the rotor 11, the pawl 21d of the clutch pinion 21 engages with the pawl 11d of the rotor 11, and the rotor 11 and the clutch pinion 21 rotate integrally. ing. That is, the second clutch means 4 is in the engaged state.

When the output gear 3a has completed a predetermined rotation, the push-down portion 41c of the cam surface 41a of the clutch lever 41 moves to a position disengaged from the upper end surface of the clutch pinion 21 by the guidance of the clutch lever operation groove 3b. I do. 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. Thereby, 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.

As described above, when the first clutch means maintains the engaged state when the output shaft 3 has completed the predetermined rotation, the output shaft 3 is held at the position where the rotation has been completed.
That is, if the ring gear 33 of the planetary gear mechanism 22 serving as the first clutch means is locked by using the magnetic induction force, when a load force for rotating the output shaft 3 in the reverse direction is generated, the reverse rotation preventing mechanism is provided. (Not shown) is the clutch pinion 21
To prevent reverse rotation of the clutch pinion 21, and the planetary gear mechanism 2 meshing with the clutch pinion 21
The rotation of the second sun gear 32 is stopped. By locking both the sun gear 32 and the ring gear 33 of the planetary gear mechanism 22 in this manner, the output shaft 3 is held at a predetermined position.

The planetary gear mechanism 22 has a first path 2
a of the rotor 1
A sun gear 32 having a receiving gear 32b receiving driving force from one side and a transmission gear 32a meshed with a plurality of planetary gears 36 on its outer periphery and transmitting driving force to the planetary gear 36, and an inner periphery meshing with the planetary gear 36 Gear part 33a and second path 2b
Peripheral gear portion 33b meshing with the speed increasing gear 28 which is a part of
And a planetary gear supporting gear 34 having a bearing plate 34a for rotatably supporting the planetary gear 36 and a pinion portion 34b meshing with the transmission gear 23 which is a part of the first path 2a. It is configured. The planetary gear mechanism 22 configured as described above receives the rotation of the clutch pinion 21 to rotate the sun gear 32, and the rotation of the sun gear 32 causes the plurality of planetary gears 36 to rotate.
The rotation of each of the planetary gears 36 in the direction opposite to that of the ring gear 33
Is designed to rotate.

For this reason, by engaging between the clutch operating piece 26 of the second path 2b and the clutch gear 27 to stop the rotation of each gear of the second path 2b, the gear meshes with the speed increasing gear 28. When the rotation of the ring gear 33 is stopped, each planetary gear 36 revolves with respect to the sun gear 32. That is, the planetary gear supporting gears 34 that rotatably support the respective planetary gears 36 rotate. As a result, the rotor 1 transmitted to the planetary gear mechanism 22 via the clutch pinion 21
The rotation force of 1 is transmitted to the output gear portion 3 a via the transmission gear 23 meshing with the planetary gear support gear 34, and the output shaft 3 rotates together with the slider pinion 7. As a result, the lever 8 provided with the slider gear 8a meshing with the slider pinion 7 is pulled up by the driving force of the motor 1 against the load imposed on the lever 8 itself.

Next, the components constituting the second path 2b will be described in more detail. As described above, the guide pinion 16 serving as the first gear of the second path 2b is
It is arranged coaxially with the rotor 11. That is, the guide pinion 16 is loosely disposed outside the clutch pinion 21 rotatably loosely fitted to the rotor shaft 15. The guide ring 16a integrally attached to the guide pinion 16 rotates following the rotor 11 by magnetic induction generated between the guide ring 16a and the rotor 11 during energization. Due to such a configuration, the induction pinion 16
Rotates around the rotor shaft 15 together with the guide ring 16a only when a magnetic guiding force is generated, regardless of the state of engagement and disengagement of the clutch pinion 21 and the rotor 11 described above.

A fan gear 25 meshes with the guide pinion 16. Therefore, when the induction pinion 16 rotates following the rotor 11 by the magnetic induction force, the fan gear 2
5 rotates around the fulcrum 25a. The fan gear 25 includes a pivot 25a that is inserted through a shaft at a main portion of the fan, and a turning power applying portion 25b that extends from the pivot 25a to a side opposite to one side of the fan. ing. At the tip of the turning power applying portion 25b,
The other end of a turning power applying spring 39 whose one end is fixed to a pin 38 erected on the motor case 13 is fixed. The fan gear 25 is provided with a rotating force that rotates in a direction opposite to the rotation by the driving force of the motor 1 (the direction indicated by the arrow A in FIG. 3) by the urging force of the rotating force applying spring 39. However, since the rotational torque of the guide pinion 16 that follows and rotates the rotor 11 of the motor 1 exceeds the drive torque of the rotating power applying spring 39, when the guide pinion 16 rotates following the rotor 11, The fan gear 25 rotates in a direction opposite to the above-mentioned arrow A direction against the spring force of the application spring 39.

On the opposite side of the other side of the fan with respect to the fulcrum 25a of the sector gear 25, a clutch operation piece 26 formed integrally with the sector gear 25 is formed. The clutch operation piece 26 is rotated by a predetermined angle by the driving force of the motor 1 via the guide pinion 16 by using the magnetic induction force by the fan gear 25, thereby forming an engagement portion formed on the outer peripheral portion of the clutch gear 27. It is designed to engage with the mating projection 27a. The rotation range of the sector gear 25 configured as described above is set in this range by one of the rotation power applying springs 39 at the time of the maximum contraction and the other by the clutch operation piece 26 abutting on the clutch gear 27. Regulated.

On the other hand, when the power supply to the motor 1 is stopped, the rotation of the rotor 11 is stopped.
When the magnetic guiding force between the guide ring 1 and the guide ring 16a disappears, the sector gear 25 rotates in the direction indicated by the arrow A by the spring force of the above-described turning power applying spring 39, and the clutch operation piece 26 is brought into contact with the engagement protrusion 27a. Move to a position outside the engagement position. Thereby, the engagement state between the clutch operation piece 26 and the clutch gear 27 is released. That is, the turning power applying spring 39
The lock release means releases the locked state of the ring gear 33 by releasing the engagement between the clutch operation piece 26 and the clutch gear 27. When the magnetic induction force disappears, the locked state of the ring gear 33 is released,
Each gear constituting the second path 2b is free with respect to the rotor 11.

At this time, the above-described reverse rotation preventing mechanism still prevents the rotation of the clutch pinion 21 and thereby the rotation of the sun gear 32 meshing with the clutch pinion 21. Even if rotation of the sun gear 32 is prevented by disengaging the engagement state between the piece 26 and the clutch gear 27, 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. Be transmitted. Therefore, the clutch gear 27 rotates freely, and the lever 8 becomes completely free with respect to the rotor 11. 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.

The small-diameter gear 27b of the clutch gear 27
The small-diameter gear 28b of the speed increasing gear 28 meshes with the ring gear 33 of the planetary gear mechanism 22 described above. For this reason, the speed increasing gear 28 starts energization from the initial state, and the clutch operating piece 26
The rotational force transmitted from the rotor 11 to the planetary gear mechanism 22 is transmitted to the clutch gear 27 side until the gears move to the position where the gears engage with each other and the rotation of each gear of the second path 2b is stopped. ing. After the clutch operating piece 26 moves to a position where it engages with the clutch gear 27, the speed increasing gear 28 causes the ring gear 33 of the planetary gear mechanism 22 to rotate.
Is stopped, whereby the driving force of the rotor 11 is transmitted to the output shaft 3 via the planetary gear mechanism 22.

Next, the operation of the geared motor of the above embodiment will be described.

In this geared motor, in the initial state where power is not supplied to the motor 1, the pushing-down portion 41 c of the cam surface 41 a of the clutch lever 41 pushes the clutch pinion 21 against the spring force of the compression coil spring 18. It is in the position to push down. For this reason, the clutch pinion 21
1 is pushed down in FIG. 1, and the lower claws 21 d of the clutch pinion 21 and the upper claws 11
d is engaged. That is, the second clutch means 4 is engaged, and the first path 2 connecting the rotor 11 and the output shaft 3 via the clutch pinion 21 is connected.
a is in a connected state.

In this state, the stator 1 of the motor 1
When power is supplied to the fourth coil 14a, the rotor 11 starts to rotate about the rotor shaft 15 as the center of rotation. Therefore, the clutch pinion 21 rotates together with the rotor 11,
The rotation is transmitted to the sun gear 32 of the planetary gear mechanism 22 and the plurality of planetary gears 36, and each planetary gear 36 rotates on the planetary gear support gear 34. Therefore, the ring gear 33 provided with the inner peripheral gear portion 33a meshing with the planetary gear 36 rotates.

On the other hand, in such a state, on the second path 2b side, the guide pinion 16 is rotated by the rotation of the rotor 11, and the fan gear 25 is rotated by the rotation force. At this time, the clutch operation piece 26 formed integrally with the fan gear 25 is at a position where it does not engage with the engagement protrusion 27 a formed on the outer peripheral surface of the clutch gear 27. Therefore, the sector gear 25 and the clutch operation piece 26 are free with respect to the clutch gear 27. Under such circumstances, the rotation of the ring gear 33 is transmitted to the speed increasing gear 28 to rotate the speed increasing gear 28, and further the rotation of the speed increasing gear 28 causes the clutch gear 27 to rotate freely.

As described above, between the initial state and the power-on initial state, the first path 2a described above includes the clutch pinion 21, the planetary gear mechanism 22, the transmission gear 23, and the output gear section 3a, and the rotor 11 and the output shaft 3 in that order. There is a connection between the three. On the other hand, the second path 2b is
And the clutch gear 27 are not engaged, and each gear is free to rotate without being stopped. Therefore, the rotation of the rotor 11 is not transmitted to the output shaft 3 even though the rotor 11 and the output shaft 3 are connected via the clutch means 4.

That is, the planetary gear mechanism 22 transmits the driving force of the rotor 11 to the output shaft 3 by stopping the rotation of the ring gear 33 described above.
As described above, during this time, the rotation of the ring gear 33 cannot be stopped because the clutch operation piece 26 and the clutch gear 27 are not engaged. If the rotation of the ring gear 33 cannot be stopped, the rotational power on the rotor 11 side is input to the planetary gear mechanism 22 via the clutch pinion 21 and then dispersed from the planetary gear mechanism 22 to the output shaft 3 and the clutch gear 27 side. Will be transmitted. Clutch gear 2 at the last stage
Since the rotational torque in this path, which is designated by 7, is smaller than the torque for rotating the output shaft 3 to which the lever 8 is connected, the output shaft 3 cannot be rotated by the driving force during this time. That is, during this time, the motor 1
Is transmitted only to the clutch gear 27 side, and is not transmitted to the output shaft 3 side. Therefore, in the drive during this time, the lever 8 is not wound up,
The rotation of the rotor 11 causes the guide pinion 16 to rotate, whereby the operation only rotates the fan gear 25 and the clutch operation piece 26 integrally. In addition, since the second path 2b is a speed-up gear train, the time until the engagement between the clutch operation piece 26 and the clutch gear 27, which is the starting point of the next operation, is extremely short.

In this operation, the sector gear 25 receives the rotation of the induction pinion 16, so that the clutch operating piece 26
Is rotated by a predetermined angle, the clutch operation piece 26 moves to a position where it can be engaged with the engagement protrusion 27a of the clutch gear 27, and the clutch operation piece 26 and the clutch gear 27 are engaged. Thereby, the rotor 11 and the ring gear 3 in the second path 2b
The three members are connected using a magnetic induction force between an induction ring 16a of the induction pinion 16 and a ring-shaped magnet 11c of the rotor 11. Along with this operation, the rotation of the clutch gear 27 that has been rotating until then stops. In addition, the speed increasing gear 28 meshing with the clutch gear 27 also stops, and the ring gear 33 of the planetary gear mechanism 22 stops in response to the stop of the speed increasing gear 28.

As described above, when the clutch operation piece 26 and the clutch gear 27 are engaged, the individual gears constituting the second path 2b, that is, the induction pinion 16, the fan gear 25, the clutch gear 27, and the speed increasing The gear 28 and the ring gear 33 of the planetary gear mechanism 22 are stopped without rotating. As a result, the rotational force of the clutch pinion 21 that rotates integrally with the rotor 11 is transmitted only to the transmission gear 23 via the planetary gear mechanism 22 serving as the first clutch means.
The output shaft 3 receiving the rotational force from the transmission gear 23 via the output gear portion 3a rotates. That is, the first clutch means 22 and the second clutch means 4 are both in the connected state, and the transmission of the rotational force between the rotor 11 and the output shaft 3 connected via the first path 2a is efficient. That is, the output shaft 3 rotates. As a result, the slider pinion 7 rotates together with the output shaft 3 and slides the lever 8 in the lifting direction.

When the output shaft 3 rotates by a predetermined angle and the lever 8 is pulled up to a predetermined position, the push-down portion 41c of the cam surface 41 of the clutch lever 41 is guided by the clutch lever operation groove 3b formed in the output gear portion 3a. Moves to a position off the upper end surface of the clutch pinion 21. Thereby, the clutch pinion 21 moves upward in FIG. 1 by the spring biasing force of the compression coil spring 18, the engagement between the clutch pinion 21 and the rotor 11 is released, and the first clutch means 4 is disconnected.

If the energized state is maintained at the end of the lifting operation, the rotor 11 naturally continues to rotate. Further, since the induction pinion 16 attempts to rotate following the rotation operation of the rotor 11 by the magnetic induction force, the engagement state between the clutch operation piece 26 and the clutch gear 27 described above is maintained. As a result, the engagement state of the first clutch means is maintained, and the second path 2b is connected with the gears stopped.

On the other hand, the lever 8 attempts to return to the original position by the load force imposed on itself. However, the return operation of the lever 8 is performed by the above-described reverse rotation prevention mechanism (not shown).
To prevent the clutch pinion 21 from reversing, and the lever 8 is held at the raised position. That is, the reverse rotation preventing mechanism is mounted so as to frictionally engage on the surface of the clutch lever 41 so as to engage when the clutch pinion 21 reversely rotates, and the clutch pinion 21 engaged with the rotor 11 rotates forward. When it rotates, it separates, and when it rotates reversely, it comes into contact with the clutch pinion 21 to prevent rotation in that direction and rotate forward.

When the energized state is maintained at the end of the lifting operation as described above, on the other hand, the above-described clutch operating piece 2
The engagement of the clutch gear 27 with the clutch gear 27 prevents the rotation of the ring gear 33 of the planetary gear mechanism 22, while preventing the reverse rotation of the clutch pinion 21, thereby preventing the planet meshing with the clutch pinion 21. Gear mechanism 2
The rotation of the second sun gear 32 is prevented. That is,
In such a state, two of the three main gears constituting the planetary gear mechanism 22 are stopped,
Therefore, the entire drive wheel train 2 does not operate at all, so that the lever 8 can be held at the raised position. For this reason,
The lever 8 is not pulled out of the case by the load force imposed on itself, and maintains that state in the pulled up position.

When the power supply to the motor 1 is stopped in this state, the rotation of the rotor 11 is stopped. For this reason,
The magnetic induction force between the induction pinion 16 and the rotor 11 disappears. For this reason, the sector gear 25 that has lost the driving force from the guide pinion 16 side rotates together with the clutch operating piece 26 by the driving force received from the guide pinion 16 by the urging force of the turning power imparting spring 39 (as indicated by an arrow in FIG. 3). A direction)
Rotate in the opposite direction. Thereby, the clutch operation piece 2
6 is disengaged from the clutch gear 27 and the clutch gear 2 is disengaged.
7 is free with respect to the clutch operation piece 26. That is, the above-mentioned first clutch means is in a disconnected state.

As described above, the connection between the rotor 11 and the ring gear 33 due to the magnetic induction force is released, and the clutch gear 27
Becomes free, the return force of the lever 8 engaging with the slider pinion 7 integrally fixed to the output shaft 3 becomes a force for rotating the ring gear 33, and the ring gear 33, the speed increasing gear 28, and the clutch gear 27 And rotate. For this reason,
The lever 8 is pulled out of the case by a load imposed on itself. That is, the lever 8 returns to the position before being pulled out by the driving force of the motor 1. By the sliding operation of the lever 8 at this time, the slider pinion 7 and the output shaft 3 are integrally rotated in the direction opposite to the above-described pulling drive. Then, the rotation of the output shaft 3 causes the output gear portion 3a to rotate integrally with the output shaft 3, and the clutch lever 41 rotates by being guided by the clutch lever operation groove 3b formed in the output gear portion 3a. As a result, the clutch lever 41 moves the cam surface 41a to the clutch pinion 2
The clutch pinion 21 is stopped at a position where the clutch pinion 21 is pressed down in the direction of the rotor 11 against the urging force of the compression coil spring 18. As a result, the claw 21d of the clutch pinion 21 and the claw 11d of the rotor 11 are arranged at positions where they can be engaged with each other, and return to the initial state in which the first clutch means 4 is engaged.

The above embodiment is an example of a preferred embodiment of the present invention, but the present invention is not limited to this, and various modifications can be made without departing from the gist of the present invention. is there. For example, in the above-described embodiment, the slide pinion 7 is rotated by the driving force of the motor 1 and the lever 8 is slid by this. However, the member to which the load is applied is formed by a wire instead of the lever 8. The wire may be wound up by a pulley.

In the above-described embodiment, when the rotation of each gear on the second path 2b is stopped by connecting the second clutch means 4, the rotation of the ring gear 33 meshed with the speed increasing gear 28 is stopped. In such a case, the first
By making the path 2a and the second path 2b of other configurations different,
The rotation of any one of the sun gear 32, the ring gear 33, and the planetary gear support gear 34 constituting the planetary gear mechanism 22 may be stopped. In the above-described embodiment, the planetary gear mechanism 22 uses the magnetic induction force.
The first clutch means is connected by locking the rotation of the ring gear 33 of the above. However, the first path 2a and the second path 2b have another configuration, and the sun gear 32 The rotation may be locked and the first clutch means may be engaged.

In addition, in the above-mentioned embodiment, the guide pinion 16 serving as the magnetic induction rotating body and the ring gear 33 of the planetary gear mechanism 22 are utilized by utilizing the spring force of the rotation force applying spring 39 as the unlocking means. The first path 2a and the second path 2b have another configuration, and the lock release means is operated to connect the guide pinion 16 to the ring gear 33 of the planetary gear mechanism 22. May be canceled.

[0066]

As described above, the present invention relates to a motor, an output shaft connected to a rotor of the motor and driven to rotate, a clutch means for disconnecting the connection between the output shaft and the rotor, and A clutch operating mechanism for connecting and disconnecting the clutch means, comprising: a magnet and a magnetic induction rotating body that are arranged to face each other such that a rotational force is transmitted to the clutch operating mechanism by magnetic induction, The magnetic induction rotating body is arranged on the inner peripheral surface of the rotor.

Therefore, unlike a conventional magnetic induction type geared motor, it is not necessary to dispose a magnet and a magnetic derivative in a wheel train disposed between a motor rotor and an output shaft. It is possible to minimize the required number of drive trains disposed between the two. This reduces noise due to frictional noise and the like when driving each gear forming the wheel train. In addition, since it is not necessary to dispose the magnet and the magnetic derivative in the wheel train, a space can be provided in the outer portion of the motor, and this space can be effectively used, and the wheel train can be freely designed. Can be made. Conversely, since the space occupied by the magnet and the magnetic derivative in the conventional geared motor is not required, it is possible to reduce the size of the entire device if necessary.

[Brief description of the drawings]

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

FIG. 2 is a plan view of the geared motor of FIG.

3 is a plan view of the geared motor of FIG. 2 with a cover and a case upper cover removed.

FIG. 4 is a plan view of the geared motor of FIG. 3 with a case main body, a clutch lever, a clutch pinion, and a spring for applying rotational force attached thereto.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 motor 2 drive train 3 output shaft 4 second clutch means 5 clutch operating mechanism (second path 2 b) 11 rotor 11 c ring-shaped magnet 11 d claw (part of second clutch means) 14 stator part 16 induction pinion (Non-magnetic derivative) 16a Induction ring 21 Clutch pinion (part of second clutch means) 21d Claw (part of second clutch means) 22 Planetary gear mechanism (first clutch means) 32 Sun gear 32a Transmission gear 32b Receiving gear 33 Ring gear 34 Planetary gear supporting gear 34a Bearing plate 34b Pinion part (gear part) 36 Planetary gear 39 Rotating force applying spring (unlocking means) 41 Clutch lever (part of second clutch means)

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Yoshio Kitamura 5329 Shimosuwa Town, Suwa County, Nagano Prefecture Inside Sankyo Seiki Seisakusho Co., Ltd. (72) Inventor Ryuhei Wada 5329 Shimo Suwa Town, Suwa County, Nagano Prefecture Sankyo Seiki Works, Ltd. (72) Inventor Tomio Kitazawa 5329 Shimosuwa Town, Suwa County, Nagano Prefecture Inside Sankyo Seiki Seisakusho Co., Ltd. (72) Inventor Kazunori Nishikawa 5329 Shimo Suwa Town, Suwa County, Nagano Prefecture F Term in Sankyo Seiki Seisakusho Co., Ltd. 3B155 AA18 BA03 BB05 HB05 HB10 5H607 AA12 BB01 CC03 DD19 EE04 EE33 EE36

Claims (7)

[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 a clutch for connecting and disconnecting the clutch means An operating mechanism, wherein the clutch operating mechanism is disposed within the rotor and rotates either integrally with the rotor, either a magnet or a non-magnetic conductor, and a magnetic induction mechanism disposed within the rotor. And a magnetic induction rotating body formed integrally with the other of the magnet and the non-magnetic conductor that rotates following the rotor, and the clutch means is disconnected by utilizing the rotation of the magnetic induction rotating body. A geared motor, characterized in that: 2. The clutch means comprises a planetary gear mechanism comprising a planetary gear supporting gear for supporting a planetary gear, a sun gear and a ring gear meshing with the planetary gear,
The rotation of the sun gear, the ring gear, and the planetary gear support gear is prevented from rotating using the rotation of the magnetic induction rotating body, and the rotation of the rotor is output via the other two gears. The geared motor according to claim 1, wherein the transmission is transmitted to a shaft. 3. The geared motor according to claim 2, wherein the planetary gear supporting gear is connected to the output shaft side, and the planetary gear mechanism is used as a reduction mechanism. 4. A second clutch means for disconnecting the connection between the output shaft and the rotor is provided between the rotor and the planetary gear mechanism serving as the first clutch means.
By rotating the rotor in a state where the clutch means is disengaged, one of the ring gear and the sun gear is locked by utilizing the rotation of the magnetic induction rotating body, and the lock is imposed on the output shaft in this locked state. 4. The geared motor according to claim 3, further comprising a reverse rotation preventing mechanism for further locking the other one of the ring gear and the sun gear that is to be reversely rotated by the applied external load. 5. The clutch device according to claim 1, wherein the second clutch means includes a clutch pinion that can be disconnected from the rotor by operating in a vertical direction in the axial direction, and a spring disposed between the rotor and the clutch pinion. Member, and is arranged between the planetary gear mechanism and the output shaft, and operates in conjunction with a gear disposed therebetween.With this operation, the clutch pinion is lowered against the spring force of the spring member. A clutch for connecting the rotor and the clutch pinion and operating in conjunction with the gear to raise the clutch pinion by the spring force of the spring member to disconnect the rotor and the clutch pinion. 5. The geared motor according to claim 4, comprising: a lever. 6. When the gear disposed between the planetary gear mechanism and the output shaft rotates reversely due to an external load imposed on the output shaft, the second clutch means rotates with the reverse rotation. The geared motor according to claim 4, wherein the geared motor is connected to a disconnection. 7. A lock release means for disconnecting the magnetic induction rotating body from the ring gear or the sun gear when the driving of the motor is stopped and the rotation of the magnetic induction rotating body is stopped. 7. The geared motor according to claim 4, wherein the connection is released by a release unit and the output shaft is reversely rotated by an external load.