JPH0919106A - Geared motor - Google Patents

Abstract

PURPOSE: To provide a geared motor for driving a load with high power by reducing the rotational power of a motor through a gear train in which the load is protected against damage by overdrive by stopping the driving of motor when the load enters into operating state. CONSTITUTION: A mechanism E for interrupting transmission of rotational power when an output shaft 6C is turned to an operating position is provided in a reduction gear train coupling between a motor B and the output shaft 6C. A mechanism J for stopping one gear in the reduction gear train when the output shaft 6C is turned over the operating position is also provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention decelerates the rotation of a motor by a gear train and transmits it to an output shaft to rotate the output shaft with a large turning force, and to drive a load with the large turning force. About geared motors.

[0002]

2. Description of the Related Art Technical matters relating to this type of geared motor are disclosed in, for example, Japanese Patent Laid-Open No. 3-198638. The contents of the publication are partially extracted in the following "Public technology column". In addition, FIGS. 1 to 4 and 6 in the above publication.
Although FIG. 10 is transcribed to the drawings of the present case, in order to distinguish the drawing number display from FIGS. 1 to 8 showing the embodiment of the present application, FIGS. 9 to 12 and FIG. It is displayed as FIG.

Publicly known technology section [In FIGS. 1 and 2, a geared motor is mounted on a base frame A,
The motor B, the output mechanism C, and the gear train D for deceleration for decelerating the rotational force of the motor and transmitting it to the output mechanism C are configured. Further, in the middle of the gear train D, a turning power cutting mechanism E and a clutch F are provided in a cascade manner. The turning force disconnecting mechanism E is for preventing the turning force of the motor B from being transmitted to the output mechanism C side when the output mechanism C is at the end position. It is for connecting or disconnecting the connection with the output mechanism C. A disconnecting operation mechanism G is connected to the disconnecting mechanism E, and a clutch operating mechanism H is connected to the clutch F. I is a slow speed mechanism for slowing the return speed of the output mechanism C. The base frame A is composed of a case 1a, a lid 1b and a mounting plate 1c, which are integrated by a screw 1d. As the motor B, a small motor known as a timer motor is used. 2a and 2b are stators, 2a 'and 2b' are magnetic poles, 3 is a coil, 4 is a rotor, and they have an annular permanent magnet 4a. 4b is a rotor pinion, 5
Is a reverse stop. Next, the output mechanism C will be described.
Reference numeral 6 denotes a main shaft gear rotatably mounted on the case 1a and the mounting plate 1c, and a pulley 7 exemplified as an output member is fixed by a screw 7a. Reference numeral 8 is a wire, one end of which is fixed to the pulley 7. The other end of the wire 8 is fixed to the operated mechanism. Next, the reduction gear wheel train D is a well-known one that is configured by using a plurality of gears. Next, the turning power cutting mechanism E is the sixth to tenth.
It is constructed by a known clutch as shown in the figure. Numerals 9 and 10 are a pair of clutch elements, and have engaging portions 9a and 10a having saw-tooth shapes which can be engaged and disengaged from each other, on the opposite surfaces. The engaging portion 9a is provided at the tip of the elastic arm 63. Element 9 is freely accessible to element 10. 11 is a spring for separating the two from each other. The clutch element 9 is connected to the pinion 4b via an integrally formed gear 9b.
Reference numeral 12 shown in FIGS. 2, 4, and 5 indicates a reverse rotation stop mechanism for preventing reverse rotation of the clutch element 10. Reference numeral 13 denotes a ratchet wheel in the mechanism, which has a plurality of claws 13a around it. This is integrally formed with the clutch element 10 as shown in FIG. Reference numeral 14 denotes a reverse rotation stop cam, which is configured to freely move about the shaft 15 in the direction of the arrow in FIG. 4 (A). The cam 14 has two locking claws 14a and 14b. One of them is always positioned on the rotation locus of the claw 13a. Next, the clutch F is constructed using a well-known planetary gear mechanism in this example as shown in FIG. 20 is a sun gear, 21 is a ring gear, 22 is a planetary gear,
It is rotatably held by a shaft body 24 attached to a planet carrier 23. The sun gear 20 is integrally formed with the clutch element 10 in the disengagement mechanism E, and the planetary carrier 23 is integrally formed with an interlocking gear 25, which is one of many gears for reduction. It is connected. Note
Reference numeral 26 is a shaft body for rotatably supporting the members indicated by the reference numerals 9, 10, 20, 23, 25. Next, the cutting operation mechanism G will be described with reference to FIGS. The mechanism G comprises a control cam 31 attached to the main shaft gear 6 and an operating lever 32 for operating the clutch element 9 according to the cam 31. The cam 31 is formed integrally with the main shaft gear 6, and a receiving portion 33 formed in an arc shape around the rotation center of the main spindle gear and a distance from the rotation center of the gear 6 to the receiving portion 33. It has a pushing piece 35 formed at a larger position and a releasing portion 34 provided between them. The operating lever 32 is a driven part 36 facing the cam 31.
And an operating portion 37 for operating the clutch element 9.
The operation portion 37 is composed of a high step portion 38, a low step portion 39 and a sloped guide portion 40 connecting them, and as shown in FIG.
39 is selectively located under the clutch element 9. Next, regarding the clutch operating mechanism H, the first, second, and third
A description will be given based on the drawings. 43 is a rotating body, and has a plurality of engaging pieces 44 on the outer circumference. The rotating body 43 can lock and unlock the ring gear 21, which is a movable portion for connecting and disconnecting the clutch F. That is, as shown in FIG. 2, in this embodiment, the gear 43a integrally formed with the rotating body 43 is meshed with the gear 45 integrally formed with the ring gear 21.
In this configuration, the rotating body 43 has the gears 45, 43 compared to the ring gear 21.
Since the gear ratio is increased by the gear ratio a, the rotating torque of the rotating body 43 is weak. Therefore, the rotation of the rotating body 43 can be prevented by locking the engaging piece 44 with a light force. However, without using the members indicated by the reference numerals 43a, 45,
The ring gear 21 may be provided with an engagement piece 44 to lock it. On the other hand, 46 is an operating body, and has a locking piece 47 exemplified as a clutch operating piece. The operating body 46 is pivotally supported by a shaft 48 so that the locking piece 47 can be repositioned between the locking position within the rotation track of the engagement piece 44 and the release position outside the rotation track. ing. The locking position is a connecting position for connecting the clutch F, and the releasing position is a disconnecting position for disconnecting the clutch F. Reference numeral 49 is a gear for connection, and 50 is a return spring for always positioning the locking piece 47 at the release position. Then 51
Indicates a magnetic induction transmission mechanism in the clutch operating mechanism,
It is constituted by a guide ring 52 and a permanent magnet 53 which are opposed to each other so as to be rotatable relative to each other. The induction ring 52 is formed of a good electric conductor such as copper that produces magnetic induction. The ring
The gear 52a is integrally connected to the rotor pinion 4b via another gear 54. On the other hand, the outer peripheral surface of the permanent magnet 53 is alternately magnetized with N and S poles. The magnet 53 is connected to the operating body 46 via a gear train 55 for deceleration. The induction ring and the permanent magnet may be replaced with each other. Next, the slow speed mechanism I will be described. This mechanism is a well-known speed control mechanism (braking mechanism) using centrifugal force, and 56 is the lid 1b.
A braking member 57, a boss fixed to the rotating body 43,
Reference numeral 58 denotes an arm integrally formed with the boss 57, which has elasticity, and a protrusion 58 for rubbing the inner peripheral surface of the braking member 56 at the outer peripheral end.
a. 59 is a weight attached to the arm 58. Then the first
Reference numeral 60 in the drawing denotes an operated mechanism, which is, for example, a drain valve in an electric washing machine or an opening / closing operation mechanism of a shutter in a ventilation fan. 61 is a movable part in the mechanism, to which the wire 8 is connected. Next, the operation of the geared motor will be described. The geared motor is a motor B
In the state in which the power is not yet applied to the cutting operation mechanism G, the cutting operation mechanism G is in the state shown in FIGS. 4 (A) and 6 (A),
The turning power cutting mechanism E is in a continuous state. The clutch operating mechanism H is in the state shown in FIG. 3 (A). When the coil 3 of the motor B is energized in this state, the rotor 4 rotates. This rotation causes the pinion 4b to move to the arrow 4 in FIG. 4 (A).
Rotate in the b'direction. The turning force is transmitted to the sun gear 20 of the clutch F via the turning force cutting mechanism E, and the gear 20 rotates. On the other hand, the rotation of the rotor 4 is also transmitted to the guide ring 52 of the magnetic induction transmission mechanism 51, and the ring 52 rotates in the direction of arrow 52b. Then, magnetic induction between the ring 52 and the permanent magnet 53 causes the permanent magnet 53 to rotate in the same direction. The turning force is transmitted to the operating body 46 via the gear train 55, and the operating body 46 moves in the direction of the arrow 46a and moves to the locking position as shown in FIG. 3 (B). In this state, even if the rotating body 43 tries to rotate, the engaging piece 44 is locked by the locking piece 47, so that the rotating body 43 is prevented from rotating. That is, the ring gear in the clutch F
The rotation of 21 is blocked and the clutch F is in the disengaged state. Even after the locking piece 47 is located at the locking position, the permanent magnet 53 is continuously given a force to rotate it by magnetic induction from the guide ring 52. The locking piece 47 is held at the locking position by the force. In the above-mentioned state, the rotation of the sun gear 20 is transmitted to the planet carrier 23 through the planet gear 22, and the planet carrier 23 rotates. The rotation of the planet carrier 23 is transmitted from the gear 25 to the main shaft gear 6 via the reduction gear, and it rotates in the direction of arrow 6a in FIG. 4 (A), and the pulley 7 moves in the direction of arrow 7b in FIG. Rotate in the direction. Then, the wire 8 is wound around the pulley 7, and the load, that is, the movable portion 61 of the operated mechanism 60 is operated. When the rotation of the main shaft gear 6 reaches the end position, in the cutting operation mechanism G,
The push piece 35 of the control cam 31 releases the driven portion 36 of the operating lever 32.
Push it toward 34, and it will be in the state shown in Fig. 4 (B). As a result, the operating portion 37 of the lever 32 is in the state shown in FIG. 6 (B), and the cutting mechanism E is in the disconnected state. Therefore, the transmission of the turning force to the clutch F is interrupted, and the driving force as described above is not transmitted to the main shaft gear 6. as a result,
It is prevented that the load is moved excessively and is damaged. Further, when the main shaft gear 6 reaches the end position as described above, even if the load has a return means (for example, a return spring), the return of the load is blocked as follows. That is, when the restoring force of the load is applied to the pulley 7 and the main shaft gear 6 tries to rotate in the reverse direction, the rotational force is transmitted to the planet carrier 23 of the clutch F via the gear train. In this case, since the clutch F is in the disengaged state, the rotational power is transmitted from the sun gear 20 to the clutch element 10 of the disengagement mechanism E, and the element 10 tends to reversely rotate. However, as shown in FIG. 4 (B) or FIG. 5, the claw 14a or the claw 14b of the cam 14 is the claw of the ratchet wheel 13.
Since 13a is locked, reverse rotation of the clutch element 10 is prevented. Therefore, the reverse rotation of the main shaft gear 6 is prevented, and the load is not restored. Next, when the power supply to the coil 3 of the motor B is stopped, the rotation of the rotor 4 is stopped. Then, the rotation of the guide ring 52 in the clutch operating mechanism H also stops. Then, the force for holding the locking piece 47 at the locking position disappears. As a result, the operating body 46 is returned to the state of FIG. 3 (A) by the urging force of the return spring 50. That is, the locking piece 47 reaches the release position. Therefore, the clutch F is disengaged, and the planet carrier 23 can be rotated in the reverse direction. That is, the return rotation of the pulley 7 is possible.
As a result, the load returns to its original state while pulling out the wire 8 by the urging force of the returning means included in the load. In this case, the spindle gear 6 rotates in the direction of arrow 6b in FIG. 4 (B) by the restoring force exerted on the pulley 7 by the load.
At the initial stage of this rotation, the control cam 31 returns the operating lever 32 to the state shown in FIG. 4 (A). Therefore, the cutting mechanism E is shown in FIG.
As shown in (A), the clutch elements 9 and 10 are in the engaged state, that is, the joint state. In this case, even if the convex portion of the engaging portion 9a of the clutch element 9 comes into contact with the convex portion of the engaging portion 10a of the clutch element 10, the arm 63 can elastically bend, and thus the clutch element 9 Alternatively, the lever 32 is not damaged. As a result of the connection of the disconnecting mechanism E, the clutch element 10
Is blocked, that is, the sun gear 20 is blocked from rotating. Therefore, the ring gear 21 rotates, and the rotation is transmitted to the rotating body 43, which rotates. The rotation of the rotating body 43 is slowed down by the slow speed mechanism I. Therefore, the main shaft gear 6 slowly rotates in the above-mentioned direction, and the load returns slowly. 』

[0004]

In this conventional geared motor, when a failure occurs in the turning power disengagement mechanism, for example, the engaging portions 9a, 10a of the pair of clutch elements 9, 10 of the turning power disengagement mechanism are mutually engaged. If the turning power is not cut off due to biting or dust entangled between both elements 9 and 10, the output shaft is not stopped even if the load reaches the operating state, and the load is moved excessively. There was a problem that it might damage the.

The geared motor of the present invention is provided to solve the above-mentioned problems (technical problems) of the prior art. A first object is to, when it is desired to drive a load, reduce the rotation of the motor and transmit it to the output shaft to rotate the output shaft with a large force and drive the load with the large force. . A second purpose is to prevent the output shaft from rotating by stopping transmission of the rotation when the load reaches the operating state in the above case, thereby preventing damage due to excessive driving of the load. Is. A third object is to stop the rotation of the output shaft when the load reaches an operating state and the disconnection is not made due to a failure of a mechanism for disconnecting the transmission of the rotation, The purpose is to prevent damage to the load. Other objects and advantages will be more readily apparent from the drawings and the following description associated therewith.

[0006]

In order to achieve the above object, a geared motor according to the present invention is a motor and an output shaft which is freely rotatable between a preparation position and an operating position for driving a load. And between them are connected by a gear train for increasing the rotational power by decelerating the rotation of the motor and transmitting it to the output shaft. In a geared motor that transmits a turning force when the output shaft is in a position other than the operating position and has a turning force cutting mechanism for interrupting the transmission of the turning force when the output shaft rotates to the operating position, A locking mechanism is provided for locking one gear in the gear train when the output shaft rotates beyond the operating position.

[0007]

When the motor rotates, the rotational power is transmitted to the output shaft through the gear train, and the output shaft rotates from the preparation position to the operating position to drive the load. When the output shaft reaches the operating position, the rotation power cutting mechanism cuts off the transmission of the rotation power, and the rotation of the output shaft is stopped. Therefore, damage to the load is prevented. When the output shaft reaches the operating position, even if the transmission is not interrupted due to a failure of the turning power cutting mechanism,
Since the gears in the gear train are locked by the locking mechanism,
The transmission of rotational force from the gear to the output shaft is eliminated, and damage to the load is reliably prevented.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, FIGS. 1 to 8 which are drawings showing an embodiment of the present application will be described. In these figures, reference characters A, B,
The mechanisms indicated by C, D, E, F, and G are base frames, motors, output mechanisms, gear trains in a known geared motor (for example, known in Japanese Patent Laid-Open No. 3-198638).
The rotary power disconnection mechanism, the clutch, and the disconnection operation mechanism are shown respectively. Each of these mechanisms and the relationship between them and other members are the same as the structure related to each of the corresponding members and the relationship between them and other members described in the above-mentioned publicly known art section. 1 to 8 are the same as or equivalent to those shown in FIGS. 9 to 17 in terms of function, and the same parts as those shown in FIGS. And the duplicate description will be omitted.

1 and 2, reference numeral 6c denotes an output shaft of the output mechanism C, which is rotatable between a preparation position 6d and an operating position 6f shown in FIG. 6e shows the progress position between them. The preparation position 6d is a position when the timer motor is in a non-operating state, that is, a state in which the load is not driven at all, and, for example, a state in which the pulley 7 is in the position shown in FIG. 12 corresponds to the state in the position (A). The operating position 6f is a position at which the driving of the load to a predetermined operating state is completed (the load is in a predetermined operating state when the main shaft 6c comes to this position),
This corresponds to the state in which the pulley 7 has reached the position shown in FIG. 6A and the state in which the main shaft gear 6 has reached the end position shown in FIG. 12B. The relationship between the turning position of the output shaft 6c and the turning force cutting mechanism E controlled by the cutting operation mechanism G is as follows when the output shaft 6c is in the preparation position 6d and the elapsed position 6e. The state in which E is connected to transmit the rotational force is set, and the state in which it is in the operating position 6f cuts off the transmission of the rotational force.

Next, J shown in FIGS. 1 to 8 is an output shaft 6c.
6 shows a locking mechanism for locking one gear of the gear train D when the gear rotates beyond the operating position 6f. The mechanism J
Uses the control cam 31 in the cutting operation mechanism G and the driven lever 71 that follows it in common, and is configured by those members denoted by reference numerals 73 and 74. A locking lever 73 is formed integrally with the driven lever 71, and has a locking claw 74 at its tip. Reference numeral 72 is a bearing shaft that rotatably supports the levers 71 and 73. The locking mechanism J is adapted to lock the sun gear 20 as an example of the gears in the gear train D, and for the locking, the clutch element 10 formed integrally with the sun gear 20.
A large number of locked claws 75 for receiving the locking by the locking claws 74 are provided around the. Incidentally, 77 is the preparation position of the output shaft 6c
It is a return spring for ensuring the return to 6d and is supported by a support piece 77c having an intermediate portion provided in the case 1a. One end 77a is elastically contacted with a receiving portion 78 of the case 1a, and the other end 77b is provided with a cam 31. It is elastically contacted with the receiving part 79 provided in the. The receiving portion 79 has a portion 79b for receiving a return force from the spring 77 to the preparation position, and a portion 79a formed in an arc shape around the rotation center of the cam so as not to receive the force in the rotation direction. Prepare

The operation of the geared motor will be described. When the rotor 4 is rotated by energizing the coil 3 of the motor B, the clutch F is engaged as described in the prior art, and the rotational power is transmitted from the sun gear 20 to the planet carrier 23. Becomes Therefore rotor 4
Is transmitted to the output gear 6 of the output mechanism C via the pinion 4b, the gear 9b, the rotation power cutting mechanism E, the clutch F, and the gears 25, 81, 82, and the output shaft 6c moves from the preparation position 6d to the elapsed position 6e. After that, the pulley 7 rotates in the direction of arrow 7b in FIG. The rotation drives the load toward a predetermined operating state. In this process, reference numerals 4b, 9b, 25, 81, 8
Not only the gears indicated by 2, 6 but also the sun gear 20 and the planetary gear 22 of the planetary gear mechanism F function as gears of the reduction gear train D. At the beginning of this process, the return spring 77 is deformed from the state shown in FIG. 3 to the state shown in FIG. 4 to accumulate the urging force for returning the output shaft.

When the output shaft 6c is rotated near the operating position 6f, the pushing piece 35 of the control cam 31 moves the driven lever as shown in FIG.
Gradually push 71 in the direction of arrow 71a. Therefore, the operating portion 37 of the operating lever 32 moves as described above, and the driven portion of the clutch element 9 moves.
9c approaches the boundary 38a between the high step portion 38 of the operation portion 37 and the guide portion 40. When the output shaft 6c reaches the operating position 6f, the driven portion 9c
6 approaches the guide portion 40, and the driven portion 9c moves the operating portion 37 through the guide portion 40 by the urging force of the spring 11 as shown by the arrow in FIG.
While pushing and moving in the 37a direction, the guide portion 40 rapidly slides down to the low step portion 39, and as shown in FIG. 6B, the turning power disengagement mechanism E causes the clutch elements 9 and 10 to be separated from each other. Cut off transmission of rotational force. As a result, the rotation of the output shaft 6c stops at the operating position, and the load stops at the predetermined operating state.

When the rotary power cutting mechanism E is in a state of cutting off the transmission of rotary power for the above-mentioned field, the operating portion 37 is suddenly moved in the direction of the arrow 37a, so that at the same time (in a synchronized state). As shown in FIG. 6A, the locking mechanism J has a locking claw 74.
Engages with the locked claw 75 to lock the sun gear 20 non-rotatably. Therefore, even if a force is applied from the load to rotate the pulley 7 in the return direction shown by the arrow 7c, the sun gear
The output shaft 6c, which is connected to the gear 20 via the gear train D, firmly maintains the stopped state, and the load is maintained in a predetermined operating state.

When the output shaft 6c is rotated to the operating position 6f as described above, the engaging portions 9a and 10a of the clutch elements 9 and 10 are engaged with each other, and the output When the shaft 6c reaches the operating position 6f and the cam 31 moves to the operating lever
When the clutch elements 9 and 10 are not separated even if 32 is operated and the transmission of the rotational power is not cut off, the output shaft 6c continues to rotate. However, at this time, the output shaft 6c moves to the operating position 6f.
When the push piece 35 pushes the driven lever 71 in the direction of the arrow 71a as shown in FIG. 8 with only a slight turning over, the locking claw 74 engages with the locked claw 75, and the sun gear Lock 20 non-rotatably. As a result, the output shaft 6c stops. This avoids accidents of overloading the load and damaging it.

When the locking claw 74 is engaged with the locked claw 75 as described above, the pressing claw 74 of the control cam 31 and the driven lever 71 and the locking lever 73 are such that the locking claw 74 engages the sun gear. It functions as a lock mechanism K for locking in the stopped state. That is, FIG.
As shown in Fig. 5, in the reduction gear train D from the pinion 4b to the output shaft 6c, the reduction ratio 83 of the gears from the pinion 4b to the sun gear that is locked by the locking claw 74 is, for example, about 1: 3. Is. On the other hand, the reduction ratio from the sun gear to the output shaft 6c
84 is, for example, about 1:40, which is much larger than the reduction ratio 83. Therefore, the lock mechanism K locks the sun gear, which can be locked non-rotatably with a slight locking force, by the extremely large force of the output shaft 6c, so that the locking is reliable. , You can achieve a state as if you were locked. This ensures that the output shaft 6c is forcibly stopped by locking the gear 20, and is effective in further increasing the certainty of preventing damage to the load.

Next, the operation for releasing the output shaft 6c from the holding state in the operating position is the same as that described in the above-mentioned prior art. When the output shaft 6c returns to the preparation position by the above release, when the output shaft 6c returns to the vicinity of the preparation position, one end 77b of the return spring 77 has a portion 79 as shown in FIG.
The cam 31 is urged in the direction of arrow 7c by the urging force for returning to the output shaft, which is installed at b. As a result, the urging force surely returns the output shaft 6c to the spontaneous return state shown in FIG.

[0017]

As described above, according to the present invention, when a load is desired to be driven, when the motor B is rotated, the rotational power is decelerated by the gear train D and transmitted to the output shaft 6c. 6c
Can be rotated with a large force, and the load can be driven with that large force. And in that case, the output shaft 6c
When reaches the operating position 6f, the rotation power cutting mechanism E cuts off the transmission of the rotation power, and the rotation of the output shaft 6c is stopped.
There is an effect that the load is moved to an operating state and stopped there, and damage due to overdriving the load is prevented. Further, when the load reaches such an operating state, even if the disconnection is not made due to the failure of the turning power disconnecting mechanism E, if the output shaft 6c tries to rotate further, the locking mechanism J causes the gear train D Since one of the gears 20 is locked, the transmission of rotational force from the gear 20 to the output shaft 6c is lost, the rotation of the output shaft 6c can be stopped, and the load is prevented from being damaged. It is reliable.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional view showing a main part of a geared motor.

FIG. 2 is an exploded perspective view showing a relationship between a gear train of a geared motor and a locking mechanism.

FIG. 3A is a diagram showing a state of a locking mechanism in a spontaneous return state (stop state) of a geared motor, and FIG. 3B is a sectional view showing a state of a turning power cutting mechanism.

FIG. 4 is a view showing a state of the locking mechanism when the output shaft starts rotating.

5A is a diagram showing a state of a locking mechanism when an output shaft is rotated to a position near an operating position, and FIG. 5B is a diagram showing a state of a turning power cutting mechanism.

FIG. 6A is a diagram showing a state of the locking mechanism when the output shaft reaches an operating position, and FIG. 6B is a diagram showing a state of the turning power cutting mechanism.

FIG. 7 is a diagram showing a state in which the return spring exerts a force for returning the output shaft to the preparation position on the output mechanism.

FIG. 8 is a view showing a state in which a locking mechanism locks a gear in a gear train.

FIG. 9 is a partially cutaway plan view of a conventional geared motor.

FIG. 10 is a longitudinal sectional view of the same.

11A and 11B are explanatory views of the operation of the clutch operating mechanism.

12A and 12B are explanatory views of the operation of the cutting operation mechanism.

13A and 13B are longitudinal sectional views for explaining the operation of the turning power cutting mechanism.

FIG. 14 is a view showing a facing surface of one clutch element.

FIG. 15 is a view showing a facing surface of the other clutch element.

16 is a sectional view taken along line IX-IX in FIG.

17 is a sectional view taken along line XX in FIG.

[Explanation of symbols]

 B Motor D Tooth train E Rotation power disconnecting mechanism J Locking mechanism 6c Output shaft 6d Preparation position 6f Operating position

Claims (1)

[Claims] 1. A motor, and an output shaft which is freely rotatable between a preparation position and an operating position for driving a load,
These are connected by a gear train for increasing rotational power by decelerating the rotation of the motor and transmitting it to the output shaft, and the output shaft is in the operating position in the middle of the gear train. In a geared motor that transmits rotation power in a state other than the above, and has a rotation power cutting mechanism for cutting off transmission of rotation power when the output shaft rotates to the operating position, the output shaft operates A geared motor comprising a locking mechanism for locking one gear in the gear train when the gear is rotated beyond the position.