JPH01194833A - Geared motor - Google Patents

Abstract

PURPOSE:To rotate or release an output member, by engaging/disengaging a clutch. CONSTITUTION:When power is fed to a motor coil 18, a rotor 19 rotates. On the other hand, an attracting chip 39 is attracted to yoke 16, 17 through leak flux of stator 15 so as to disable rotation, thus engaging a clutch 28 through a transmission mechanism 41. Rotation transmitted from the rotor 19 to a spur gear 30, under this state, is decelerated through a sun gear 29 and a planetary gear 33 then further decelerated through a spur gear 35 and other gears, and an output lever 12 is rotated through an output gear 11 to drive a driven member. When power supply to the coil 18 is interrupted, rotary force of the rotor 19 disappears. Consequently, leak flux of the stator 15 disappears to release the attraction chip 39 so as to disengage the clutch 28 through the transmission mechanism 41. As a result, the output member 3 is set free thus to set the driven member in free state.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a geared motor used to operate driven members in various mechanical devices.
The present invention relates to a geared motor in which an output member for driving a driven member can be rotated or set in a free state.

[Conventional technology]

It has a motor and an output member for driving a driven member, and between the rotor of the motor and the output member,
They are connected by a gear train with a clutch in the middle, and the clutch is also equipped with an operating mechanism for turning it on and off, and the operating mechanism is connected to the fixed iron core and the coil wound around it. A relay consisting of a movable iron core that is attracted to it by magnetic flux from a fixed iron core,
A transmission mechanism is known in which the movement of the movable iron core in the relay is transmitted to an operating section in the clutch to turn the clutch on and off.

[Problem to be solved by the invention]

In this conventional geared motor, the relay requires many parts as described above, and the coil of the relay requires electrical wiring work, which increases the cost.

The present invention has been made in view of the above points, and its purpose is to enable the output member to be rotationally driven or to be in a free state by turning on and off the clutch, and to make it possible to drive the output member in a free state. To provide a geared motor in which an operation mechanism for turning on and off a clutch is extremely simplified even in the case of a geared motor, and the manufacturing cost can be reduced.

[Means to solve problems]

The present invention takes the measures as described in the claims above, and its effects are as follows.

[Effect]

When the coils of the motor are energized, the rotor rotates, and the magnetic flux leaking from the stator attracts the attraction pieces, causing the clutch to engage. The rotation of the rotor is then transmitted to the output member through the clutch, causing it to rotate. On the other hand, when the power supply is cut off, the rotor stops, the suction piece is released, and the clutch is disengaged. The output member is then in a free state.

〔Example〕

The drawings showing the embodiments of the present application will be described below.

In the geared motor l shown in FIGS. 1 to 6, 2 is a base frame, and 3 is an output member for driving a driven member. (see Fig. 5.6) and the end position (see Fig. 5.6). 4 indicates a motor attached to the base frame 2, 5
is a gear train interposed between the rotor of the motor 4 and the output member 3.

In the base frame 2, 6 indicates a concave case, 7.8 indicates a base plate, and 9 indicates a cover. Reference numeral 7a denotes a stopper, which is placed along the inner wall surface of the case 6 and is pressed by the base plate 8 attached to the case 6 to prevent the base plate 7 from lifting up.

Next, in the output member 3, 10 is an output shaft pivotally connected to the base frame 2, to which an output gear 11 and an output lever 12 are attached. Reference numeral 13 indicates a connecting pin provided on the output lever, and reference numeral 14 indicates a return spring stretched between the output lever 12 and the cover 9.

Next, the motor 4 is of a well-known type, and includes 15 motors.
In the stator, 16 is a yoke made up of a part of the case 6, 17 is a yoke made up of the main plate 7, and 18 is 16.1 for both sides.
This is a coil for generating magnetic flux for rotating the rotor, which is provided between 7 and 7. Both yokes 16 and 17 are made of magnetic material, and each has a plurality of magnetic pole pieces 16al1 on its inner periphery.
7a. The magnetic pole pieces 16a and 17a are the coil 18
They are arranged along the inner peripheral surface of. As shown in FIG. 1, the outer circumferential edge of the yoke 17 is spaced apart from the yoke 16 in most parts except for a small portion of the stopper piece 7a.

19 indicates a rotor in the motor 4. 8-rotor 19
20 is a boss made of synthetic resin, and is rotatably mounted on a shaft 19a attached to the case 6. Reference numeral 21 indicates a ring-shaped permanent magnet attached to the boss 20. 22 is a pinion formed integrally with the boss 20, and 23 is a well-known reverse stop portion, which is configured to prevent the rotor 19 from rotating in reverse by a reverse stop member 24 attached to the yoke 17.

Next, the gear train 5 is configured to reduce the rotation speed of the rotor 19 and transmit it to the output member 3', and is constructed by combining a plurality of gears. In FIG. 2, 27 indicates the presence of a large number of gears.

Reference numeral 28 denotes a clutch interposed in the middle of the gear train, which is used to cut off or enable the transmission of rotational force, as is well known, and in this example, a planetary gear system is used. In the planetary gear device, 29 is a sun gear, which is attached to one rotating shaft 30a in the gear train 5. For example, it is formed integrally with the rotating shaft 30a of the No. 1 spur gear 30. Furthermore, rotation axis 3
0a is rotatably mounted on a shaft 31 fixed to the base plate 7. A ring gear 32 is rotatably mounted on the shaft 31. 33 is a planetary gear interposed between the sun gear 29 and the ring gear 32. A pinion 34 is rotatably mounted on the rotating shaft 30a, and meshes with a spur gear 35 adjacent to the rotating shaft 30a in the gear train 5. The planetary gear 33 is rotatably mounted on a shaft 36 attached to the pinion 34.

Next, 38 indicates an operating mechanism for operating the clutch on and off. In this mechanism 38, 39 is an adsorption piece made of magnetic material, which is attached to the stator 15 of the motor 4 and the yokes 16 and 17 of the same. It is attached so that it can be straddled. Further, this suction piece 39 is rotatably supported by a shaft body 40. Reference numeral 41 indicates a transmission mechanism interposed between the attraction piece 39 and the operating section (ring gear 32 in this example) of the clutch 28. In the mechanism 41, reference numerals 42 to 45 indicate a gear train for interlocking, in which the gear 42 with the least number of rotations during operation is integrally formed with the ring gear 32, and the gear 45 with the largest number can be rotated integrally with the suction piece 39. It is connected.

Next, reference numeral 53 indicates a locking means for locking the rotation of the rotor 19 in the motor 4. In this case, 54 is a stop piece attached to the output gear II of the output member 3.

The stop piece 54 may be formed integrally with the gear 11, or may be configured with a pin attached to the gear 11 afterwards. 5
Reference numeral 5 denotes a stop portion provided on the rotor 19.

The positional relationship between the stop piece 54 and the rotor 19 is such that when the output member 3 reaches the terminal position as shown in FIG.
1.4, the stop piece 54 is set in a positional relationship in which it is not in contact with the stop portion 55 when the stop piece 54 is not in the terminal position. Although the above-mentioned stop portion 55 is constituted by the outer circumferential surface of a bulging portion integrally formed with the boss, it may also be a side surface as shown by reference numeral 55a, or the stop portion may be a relatively smooth surface. It may be a rough surface, a rough surface, or a surface provided with many unevenness.

In the above configuration, when the coil 18 of the motor is energized, the generated magnetic flux passes through the yoke 16, 17 and reaches the magnet 21 of the rotor I9, causing the rotor 19 to rotate. Furthermore, magnetic flux leaking from the stator 5 causes the attraction pieces 39 to be attracted to the yokes 16 and 17, making them unable to rotate. Therefore, via the transmission mechanism 41, the clutch 28 becomes in the human state. That is, the ring gear 32 is locked via the gears 42 to 45, and rotational force can be transmitted between the sun gear 29 and the planetary gears 33. In this state, the rotation transmitted from the rotor 19 to the spur gear 30 in the gear train 5 is transmitted to the pinion 34 through the meshing of the sun gear 29 and the planetary gear 33.

Further, the rotation is also decelerated between the pinion 34 and the spur gear 35 and transmitted to the spur gear 35. Furthermore, the rotation is caused by gear train 5.
Output gear 11 while being reduced by other gears in
is transmitted, and the output lever 12 rotates in the direction of the arrow in FIG. This rotation is used to drive the driven member.

When the output lever 12 reaches the terminal position shown in FIG. 5.6 by the above rotation, the stop piece 54 comes into contact with the stop part 55. As a result, rotation of the rotor 19 is locked. When the rotor 19 is locked in this way, the output member 3 connected to it via the tooth train 5 is also locked at the terminal position as shown in FIG. When stopped, the magnetic flux disappears. Then rotor 19
The rotational force of disappears. Further, as the magnetic flux leaking from the stator 15 disappears, the adsorption piece 39 is released and becomes freely rotatable. As a result, the clutch 28 is disengaged via the transmission g9 mechanism 41. That is, the ring gear 32 becomes freely rotatable, and rotational force is no longer transmitted between the sun gear 29 and the planetary gears 33. As a result, the output member 3 becomes free, and the driven member also becomes free. In this case, in this example, the output member 3 is returned to the starting position shown in FIG. 1.4 by the biasing force of the return spring 14.

Next, the driving of the driven member by the output member 3 may be performed by the output shaft IO or by the output gear 11, depending on the mode of operation of the driven member. Further, instead of the output member that rotates back and forth as described above, a rack that moves linearly back and forth may be used, and the gear train 5 for deceleration may be meshed with the rack.

Further, the stop piece 54 is connected to the output shaft 1 instead of the output gear 11.
0 or attached to the output lever 12, or the gear train 5
It may also be attached to a gear closer to the output member than the planetary gear device 28.

Next, FIG. 7 shows an example of the use of the geared motor 1, in which it is used in a ventilation fan 61, and FIG. 8 shows its connection circuit. In these figures, 62 is a frame of a ventilation fan, 63 is a fan motor, 64 is a fan, 65 is a shaft that can be opened and closed, and 66
is a shutter operation member exemplified as a driven member, and the operating position (double-dashed line) and return position (solid line) are shown in the direction of the arrow.
It can freely reciprocate between the two, and is biased by a spring from the operating position to the return position. The operating member 66 is connected to the output lever 12 (connecting pin 13) of the geared motor 1 via a connecting member (for example, a string) 67. Note that 68 represents a power plug, and 69 represents a power switch.

In the above configuration, when the switch 69 is turned on, the fan motor 63 rotates, the output lever 12 of the geared motor 1 moves from the starting position to the final position, and the shutter operating member 66 moves from the return position to the operating position and is held there. be done. As a result, the shutter 65 becomes open. When the switch 69 is opened, the fan motor 63 stops and the output lever 12 becomes free.
The shutter operating member returns to the return position and the shutter 65 is closed.

Next, FIGS. 9 to 11 show different embodiments of the operating mechanism for operating the clutch.

In the figure, reference numeral 71 denotes a supporting shaft, and the suction piece 398 is attached to the shaft 71 with a mounting member 72 so as to be movable in the direction of the arrow. Reference numeral 73 denotes a rotation regulating piece attached to the case 6e, which is used to regulate the rotation of the suction piece 398.

In the transmission mechanism 41e, 75 is a rotating body, and 76 is an engaging part 76 provided around the rotating body, which is formed with a large number of notches. Reference numeral 77 denotes an engaging/disengaging member, which is formed integrally with the mounting member 72 and is attached to the shaft body 71 so as to be freely movable in the axial direction. Reference numeral 78 indicates an engaging claw, and reference numeral 79 indicates a biasing spring.

In the structure described above, when leakage magnetic flux is generated from the stator, the attracting pieces 39e are attracted as shown in FIG. 11. Then, the clutch becomes in the human state via the transmission mechanism 41e. That is, the engaging claw 78 engages with the engaging portion 76, the rotation of the rotating body 75 is restricted, and the ring gear 32e in the clutch is locked.

On the other hand, when the magnetic flux disappears and the attraction piece 39e is released,
The clutch is disengaged via the transmission mechanism 41e. That is, the engaging/disengaging member 77 is displaced as shown in FIG. 10 by the biasing force of the spring 79, the engaging claw 78 is disengaged from the engaging portion 76, the rotating body 75 becomes free, and the ring gear 32e also becomes free. It should be noted that parts that are considered to have the same or equivalent structure as those in the previous figure in terms of function are given the same reference numerals as in the previous figure with the letter e, and redundant explanations are omitted.

〔Effect of the invention〕

As described above, in the present invention, when it is desired to drive a driven member, the rotor 1 is driven by energizing the coil 18 of the motor 4.
9 rotates, the clutch 28 engages and the output member 3 rotates, which has the advantage that the driven member can be driven according to the user's will.

On the other hand, when it is desired to stop driving the driven member, the power supply is cut off to stop the rotor 19, and the clutch 28 is disengaged, the output member 3 becomes free, and a free state of the driven member can be achieved. There is.

Moreover, even if the clutch 28 is manually disengaged as described above, when the clutch 28 is manually disengaged, it is automatically disengaged due to the attraction and release of the attraction pieces depending on the presence or absence of magnetic flux leaking from the stator 15 of the motor 4. , it has the advantage that it can be turned on and off without requiring a complicated operating mechanism such as the conventional relay described above. This has the advantage that the number of parts is extremely small compared to conventional products, and the troublesome wiring work of conventional products can be avoided, resulting in significantly lower costs.

Furthermore, if the clutch 28 is configured with a planetary gear mechanism, and the ring gear serving as the speed increasing member serves as the operating part, when locking or releasing the ring gear to turn on or off the clutch, The effect is that the force required for the operation is small.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application. Figure 1 is a front view with the cover and base plate removed, Figure 2 is a longitudinal sectional view showing the power transmission path, and Figure 3 is a diagram showing the case and two base plates. Figure 4 shows the state of the locking means when the output member is in the starting position, and Figure 5.6 shows the state of the locking means when the output member is in the terminal position. FIG. 7 is a perspective view showing an example of use; FIG. 8 is a connection circuit diagram in the example of use shown in FIG. 7;
Part 9 is a partial view showing a different example of the operating mechanism, and FIGS. 10 and 11 are longitudinal sectional views for explaining the operation of the operating mechanism in FIG. 3... Output member, 4... Motor, 19... Rotor, 5... Tooth train, 28... Clutch, 38... Operating mechanism, 39... Adsorption piece. Figure 7 Figure 10 B< Figure 11

Claims (1)

[Scope of Claims] 1. A motor consisting of a stator equipped with a coil for generating magnetic flux for rotor rotation and a rotor rotated by the magnetic flux emitted from the stator, and an output member for driving a driven member. The rotor of the motor and the output member are connected by a gear train having a clutch in the middle, and the clutch is provided with an operating mechanism for turning it on and off. In the attached geared motor, the operating mechanism includes an adsorption piece attached to the stator so as to be attracted and released depending on the presence or absence of leakage magnetic flux from the stator, and an adsorption of the adsorption piece;
A geared motor comprising a transmission mechanism interposed between the suction piece and an operating part of the clutch so as to turn the clutch on and off in response to release. 2. The clutch is a planetary gear device in which a sun gear and a planetary gear are connected to gears on the motor side and output member side of the gear train, respectively, and the suction piece is rotatably attached to the stator, 2. The geared motor according to claim 1, wherein the transmission mechanism is a gear train connecting the suction piece and a ring gear in the planetary gear device. 3. The clutch is a planetary gear device in which a sun gear and a planetary gear are linked to gears on the motor side and output member side of the gear train, respectively, and the transmission mechanism is provided with an engaging part and linked to a ring gear. 2. The geared motor according to claim 1, comprising a rotating body and an engaging/disengaging member that engages and disengages from the engaging portion of the rotating body in response to adsorption and release of the suction piece.