JPH0285487A - Actuator - Google Patents

Abstract

PURPOSE:To reduce the number of parts and easily shift a driven member to a desired position manually by integrally revolving a clutch member in contact with a core by the magnetization in electric conduction. CONSTITUTION:In a motor 21, a clutch member 22 is joined integrally onto an output shaft 43. A core 45 is magnetized by the electric conduction to the motor 21, and when the clutch member 22 is adsorbed onto the core 45, the clutch member revolves integrally with the core, and transmits a rotary driving power to the driven member 22. Further, when the motor does not conduct, the core is demagnetized, and the electromagnetic connection between the core and the clutch member is released, and the clutch member can be revolved in the state separated from the core.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention particularly relates to an actuator with a clutch that uses a motor as a drive source.

2. Description of the Related Art Actuators are currently used in various mechanical fields. These actuators are required not only to operate reliably but also to be compact in size.

For example, Japanese Patent Publication No. Sho 62-21110 discloses a door lock operating device for an automobile that uses a motor to lock and unlock a door lock body. This operating device includes an intermediate reduction gear that meshes with a pinion of a motor rotating shaft, a swing gear that is connected to an output shaft for operating an operated lever of a door lock body, and an intermediate pinion that meshes with the swing gear.

The intermediate reduction gear and the intermediate pinion are coaxially supported, and each of the intermediate reduction gear and the intermediate pinion is provided so as to be engageable with each other through an elastic body with a rotational play angle corresponding to the stroke of the operated lever. . In such a configuration, in order to perform manual operation without load, after locking/unlocking by the motor, the intermediate reduction gear is reversed by the elastic body and returned to an angular position where the intermediate pinion is not restrained with respect to the intermediate reduction gear.

However, in the conventional operating device described above, the rotation of the intermediate pinion may be interfered with by the intermediate reduction gear due to failure of return of the intermediate reduction gear during motor operation or half-hearted manual operation. be. In this case, there is a drawback that the lever cannot be returned to its normal state unless the operator operates the operated lever with extremely large manual pushing force or pulling force. Furthermore, since it requires at least two gears and two pinions and has a large number of parts, it requires many man-hours for assembly and has the disadvantage that the product price cannot be reduced. Furthermore, due to the combination of the intermediate reduction gear and the intermediate pinion, there is a drawback that the device cannot be miniaturized.

In short, in conventional actuators, the opening force was extracted from a pinion fixed to the output shaft of the motor, and a complicated latch mechanism was installed between the pinion and the driven member.
The disadvantage was that the number of parts increased. In addition, when the motor stops midway through the rotating strobe for some reason, moving the driven member manually will generate a back electromotive force in the core, so it is necessary to manually move the driven member to the desired position. It wasn't easy.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an actuator that overcomes the above-mentioned drawbacks, can be easily operated manually at all times, and can be manufactured in a compact size.

Means for Solving the Problems The actuator according to the present invention includes a motor having a core rotatably supported around an output shaft relative to the output shaft, and a motor made of a magnetic material to magnetize and demagnetize the core. It includes a clutch member that adsorbs and detaches from the core and rotates integrally with the output shaft, a pinion coupled to the end of the output shaft, and a driven member connected via the pinion to which rotation of the motor is transmitted, When energized, the clutch member comes into contact with the core and rotates as a unit. Further, a structure in which the clutch member is movable in the axial direction relative to the output shaft is also possible.

The core is magnetized by energizing the working motor. This magnetization causes the clutch member to be attracted to the core. Therefore, the clutch member rotates together with the core and transmits rotational power to the driven member.

When the motor is not energized, the core is demagnetized, the electromagnetic coupling between the core and the clutch member is released, and the clutch member can rotate while separated from the core.

Therefore, the driven member can be easily operated manually.

EXAMPLES Hereinafter, the present invention will be explained in detail based on FIGS. 1 to 11. Here, in the automobile door lock device,
An example of implementation is an actuator for operating a knob that locks and unlocks a door.

As shown in FIG. 1, an actuator 1 according to the present invention
0 is the lock lever 1 of the automobile door lock device 11-
It is used for the operation of 2. The lock lever 12 is connected to an operation knob 13 and an actuator 1 that protrude upward from the door of the automobile.
0 rod 14. When the lock lever 12 is in the upper position shown by the solid line, the door lock device 11 is in an unlocked state and the door can be opened. However, when the lock lever 12 is in the lower position shown by the dotted line, the door lock device 11 is in a locked state and the door cannot be opened.

2 to 4 illustrate an actuator 10 according to the present invention.
A first example is shown below. The actuator 10 includes a housing 20, a motor 21 housed in the housing 20, a clutch member 22 housed in the motor 21, a first driven member 23 operably connected to the clutch member 22, and a first driven member 23. The second driven member 24 is operatively connected to the driven member 23 of , and the third driven member 25 is operatively connected to the second driven member 24 . The clutch member 22 is formed of a magnetic material such as sintered iron or iron alloy into a substantially cup shape, and is connected and fixed to the motor output shaft 43. A pinion 26 is coupled to an end of the output shaft 43. The first driven member 23 has a crown gear 31 that meshes with the pinion 26, and a pinion 32 that is integrally formed with the crown gear 31 from resin. The first driven member 23 is rotatably attached to a shaft 34 supported by a bearing portion 33 of the housing 2○. A spur gear 35 of the second driven member 24 meshes with the pinion 32 . The pinion 36 integrally formed with the spur gear 35 from resin is connected to the rack 37 of the third driven member 25.
is engaged. A rod 14 shown in FIG. 1 is connected to an end of the third driven member 25 that protrudes outward from the opening 20a of the housing 20. In any case, the first driven member 23 to the third driven member 25 constitute a speed reduction device. These speed reducers can be molded from resin such as nylon or polyacetal.

As shown in FIG. 5, the motor 21 is arranged between a case 40, a first bearing 41 and a second bearing 42 supported by the case 40, and between these first and second bearings 4 and 42. An output shaft 43 that is rotatably supported, a clutch member 22 that is integrally coupled and fixed on the output shaft 43 with a key (not shown), etc., and a core that is attached to the output shaft 43 and has a bracket coil 44. 45, a commutator 46 attached to the output shaft 43 adjacent to the core 45, a brush 47 attached so as to be able to contact the commutator 46, a magnet 48 fixed around the core 45, and a clutch member 22. It has an insulating spacer 49 joined to the inner surface and fixed to the outer periphery of the output shaft 43, and a spring 52 wound around the output shaft 43 via a retainer 50. This spring 52 connects the clutch member 22 and spacer 49 to the coil 44.
and is biased in a direction to separate it from the core 45 and the like.

The spacer 49 prevents the sintered clutch member 22 from coming into direct contact with the core 45 and causing wear or damage.

When the core 45 is demagnetized, the spring 51
It has a function of reliably separating the clutch member 22 from the clutch member 22.

Here, the coupling form of the output shaft 43 and the clutch member 22 includes the above-mentioned key fitting. In the case of this key fitting, both members not only rotate integrally but also move integrally in the axial direction. However, in this invention, even if the output shaft 43 and the clutch member 22 move relative to each other in the axial direction,
Spline fitting or serration fitting can also be used as a structure that satisfies this requirement. In addition, tapered fitting and a square fitting cross section are also possible. Therefore, the output shaft 43
Similarly, the pinion 22 provided at the end of the pinion 22 moves slightly in the axial direction, causing a misalignment in the meshing surface between the pinion 22 and the first slidable portion 23, but this does not affect the transmission of motion.

In this way, since the clutch member 22 is integrally coupled to the output shaft 43, the second bearing 42 is not in a direct mechanical coupling relationship with the clutch member 22; A relatively small size corresponding to the diameter is sufficient.

In the configuration described in -J-, when the coil 44 is energized and excited, the core 45 is electromagnetized. Therefore, the core 45 is attracted to the clutch member 22, and the contact portion 45a of the core 45
contact the peripheral edge 22a of the clutch member 22 and are electromagnetically coupled to each other. Further, since the clutch member 22 rotates due to the rotation of the core 45, the third driven member 25 is connected to the second driven member through the first driven member 23 and the second driven member 24.
It moves to the right in the figure and comes into contact with a protruding stopper 54 formed integrally with the housing 20 and is stopped.

Similarly, when a current in the opposite direction is supplied to the coil 44, the clutch member 22 rotates in the opposite direction, and the third driven member 25 moves to the left in FIG.
5 and stops.

Since the core 45 is demagnetized when the coil 44 is not energized, the electromagnetic coupling between the clutch member 22 and the core 45 is released. Therefore, when the operating knob 13 is manually operated, the clutch member 22 rotates separated from the core 45 via the first driven member 23 to the third driven member 25. It becomes possible to move easily.

Various modifications can be made to the above-described embodiments of the invention.

For example, as shown in FIGS. 6 and 7 as a second embodiment, a combination of a spur gear 3 and a pinion 32 that engages the first driven member 23 with a pinion 26 without using a crown gear. , has a fan-shaped gear 35 that engages the second driven member 24 with the pinion 32, and an arm portion 57 fixed to the shaft 56 of the gear 35.

Further, as shown in FIGS. 8 to 10, the first driven member 23 has a housing 20 that meshes with the pinion 26 and
The second driven member 24 has a nut portion 62 that meshes with the feed screw portion 61, and is movable from the housing 20 in a reciprocating manner. A protruding connecting member 63 can also be provided. The connecting member 63 has a notch portion 63a into which the feed screw portion 61 is relatively inserted. A connector portion 63b to which the rod 14 is connected is provided at the outer end of the connecting member 63.

A rubber bellows portion 65 (FIG. 1) is provided between the connector portion 63b and the housing 20 for the purpose of waterproofing.

The connector portion 63b is provided with an opening 63d, and an elastic body 63e made of rubber or the like is placed in the opening 63d. A through hole 63f into which the pin 64 is inserted is formed in the elastic body 63e. The pin 64 passes through a hole (not shown) drilled in the rod 14. The elastic body 63e absorbs the impact when the connecting member 63 moves. In the example shown in FIG. 4, the core 45 moves in the axial direction, but in FIGS.
The illustrated example shows an example in which the clutch member 22 slides on the output shaft 43 and is connected to or separated from the core 45.

As shown in FIG. 9, a magnet 48 is provided around the core 45.

Furthermore, instead of molding the entire clutch member 22 from a magnetic material, the center portion 22b including the pinion 26 is molded from a die-cast product such as zinc, as shown in FIGS. 11 and 12.
The cup-shaped portion 22c may be formed of a magnetic material, and the center portion 22b and the cup-shaped portion 22c may be provided in the spindle portion 22d so as to be slidable relative to each other.

In short, in this invention, when the motor 21 operates the driven members 23 to 25, the coil 44 wound around the core 45 of the motor 21 is energized to magnetize the core 45.

Therefore, the clutch member 22 is attracted to the core 45 by electromagnetic action and is electromagnetically coupled to the core 45. Therefore, the clutch member 22 rotates together with the core 45 and transmits power to the driven members 23 to 25.

When the motor is de-energized, the core 45 is demagnetized;
The electromagnetic coupling between the clutch member 22 and the clutch member 22 is released, and the clutch member 22 becomes rotatable while being separated from the core 45.

Therefore, the moving members 23 to 25 can be easily operated manually.

As mentioned above, the actuator according to the present invention uses electromagnetic coupling between the core and the clutch member when energized, so it is possible to obtain an actuator that has a small number of parts, operates reliably, and is small and inexpensive. Can be done.

[Brief explanation of the drawing]

FIG. 1 is a connection diagram of an embodiment in which the actuator according to the present invention is applied to an automobile door lock device, and FIG. 2 is a plan view of the actuator according to the present invention partially shown in cross section.
Figure 3 is a sectional view taken along line A-A in Figure 2, and Figure 4 is a cross-sectional view of the
5 is a sectional view of the motor provided with a clutch member, FIG. 6 is a schematic diagram showing a second embodiment of the present invention, FIG. 7 is a plan view of FIG. 6, 8 is an exploded perspective view of the third embodiment of the present invention, FIG. 9 is a plan view of FIG. 8, FIG. 10 is a sectional view taken along the line B-B of FIG. 9, and FIG. A sectional view of a clutch member showing an embodiment, FIG.
FIG. 1 is a front view of FIG. 106. Actuator, 209. housing,
215. motor, 220. Clutch member, 23-25
1. Driven member, 450. core. Patent applicant: Kokusan Metal Industry Co., Ltd. Figure 6 Figure 7 Figure 8 Factor

Claims (2)

[Claims] (1) A motor that has a core that is rotatably supported around the output shaft relative to the output shaft, and that is molded from a magnetic material and is attracted to and detached from the core by magnetizing and demagnetizing the core, and is integrated with the output shaft. It includes a clutch member that rotates, a pinion connected to the end of the output shaft, and a driven member that is connected via the pinion and transmits the rotation of the motor. An actuator that is characterized by being in contact with and rotating together. (2) The actuator according to claim (1), wherein the clutch member is movable in the axial direction with respect to the output shaft.