JPS631837A - Actuator - Google Patents

Abstract

PURPOSE:To simplify the structure while satisfying the function and to reduce the size and weight, by supporting an input internal gear idly within a setting stroke range on the housing and stretching a returning spring for resetting one of the input or output internal gear and an arm member in a planetary gear mechanism to a relative neutral position between said internal gear and the arm member. CONSTITUTION:The operational reaction of a planetary gear mechanism 40 is born by stopping an input internal gear at one end of a setting stroke so as to displace an arm member 44 and the input internal gear 42 relatively. When an actuator 10 stops, the arm member 44 and the input internal gear 42 are reset to a relative neutral position by the energizing force of a returning spring 24 so as to rotate the input internal gear 42 from one end to the other end of said setting stroke. Consequently, when an external force is inputted, the input internal gear 42 idles in the setting stroke and follows to the external force, thereby the external force can function lightly without subjecting to resistance. Since a light operation can be achieved without providing a clearance in an operation transmitting system, the structure can be simplified and the size and the weight can be reduced with the function being satisfied.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an actuator that has a 'M planetary gear reduction mechanism driven by a driving motor and is adapted to reciprocate an object to be operated, such as an automobile door lock. .

"Prior Art" A conventional actuator for operating a door lock for an automobile is disclosed in, for example, Japanese Utility Model Publication No. 54-30317.

That is, the publication discloses an actuator having a gear reduction mechanism, and this actuator not only operates the door lock with the actuator, but also allows the door lock to be manually operated without interfering with the actuator. , a connecting means having a play equivalent to the operating stroke of the operated lever is interposed between the gear reduction gear Ia4X11 and the operated lever.

"Problems to be solved by the invention" However, with such conventional actuators,
Since the gear reduction mechanism is large because it takes up space and is provided with a connecting means with play, there are problems in that it becomes structurally complex and there is a risk of rattling in the motion transmission system.

The present invention has been made in view of these conventional problems, and an object of the present invention is to provide an actuator that operates reliably and is smaller and lighter in weight.

``Means for Solving Problems'' The gist of the present invention for achieving the above object is to provide an actuator that has a planetary gear reduction mechanism driven by a driving motor and that reciprocates an object to be operated. In the planetary gear reduction mechanism, a sun gear fixed to the output shaft of the driving motor, an input internal gear and an output internal gear, which are respectively arranged concentrically with the sun gear, mesh with the sun gear, and a first southern portion meshing with the input internal gear;
and a planetary gear having a second tooth portion that meshes with the output internal gear and is supported through an arm member so as to be capable of planetary movement around the sun gear, and the input internal gear is moved to a set stroke. A return mechanism supported on the actuator housing so as to be freely movable within a range, and between one of the input internal gear or the output internal gear and the MJ arm member of the gear mechanism to return both to a relative neutral position. An actuator characterized by having a spring tensioned therein.

``Action'' So, we can create an object of movement by the movement of the actuator!
When performing EIJ, the output of the drive motor is decelerated by the planetary gear reduction mechanism, and the output is reduced by 1! iIl & car inside 111
Move the member and actuate the object with the middle member.

The operational reaction force of the planetary gear mechanism is received by the input internal @ gear stopping at one end of one depressing stroke, and the arm member of the planetary gear reduction mechanism and the input internal gear are relatively displaced.

When the actuator stops, the relatively displaced arm member of the planetary gear reduction mechanism and the input internal gear return to the relative neutral position due to the biasing force of the return spring, and the displacement at the time of return causes the input internal gear to rotates from one end of its setting stroke to the other.

The input I gear rotates from one end of its set stroke to the other, so when an external force that is not the actuator's power is input, the input inner I gear moves within its set stroke and follows the external force, and the external force is It can be operated easily without encountering resistance.

"Embodiments" Various embodiments of the present invention will be described below based on one drawing. Note that similar parts in each embodiment are denoted by the same reference numerals, and redundant explanation will be omitted.

1 to 4 show a first embodiment of the present invention.

The output member 11 of the actuator 10 is connected to an operated lever A2 of a locking mechanism A, which is an object to be operated, via a connecting link A1. Output member 11 from lock mechanism A
The transmission systems up to this point are connected without any play.

The actuator 10 has a driving motor 30 disposed at the base within the housing 20, and an output shaft 3 of the driving motor 30.
1 is connected to a planetary gear reduction mechanism 40.

The planetary gear reduction mechanism 40 is connected to the output shaft 31 of the drive motor 30.
an input internal gear 42 which is arranged concentrically with the sun gear 41 and is pivotally supported by a pivot post 21 provided in the housing 20, and an output shaft which is pivoted on the upper surface of the actuator lO. 12, and a planetary gear 45 which is plate-shaped as one component but is supported so as to be capable of planetary movement around the sun gear 41 via a mechanical arm member 44. .

The planetary gear 45 meshes with the sun gear 41 and has a first gear part 46 that meshes with the input internal gear 42 .

A second still part 47 that meshes with the output internal gear 43 is shown on the right.

An engaging protrusion 42a is provided at the base of the input internal gear 42 to protrude laterally, and a JI groove 22 with which the retaining protrusion 42a engages is formed on the side wall of the housing 20. As can be seen in FIG. 3, the regulation groove 22 has a circumferential cross section, and the engagement protrusion 42a is movably engaged between the negative end 22a and the other end 22b, and the movement stroke of the engagement protrusion 42& is output member 1
It is set corresponding to the operation stroke of 1.

The base of the output member 11 is fixed to the end of the output shaft 12 protruding from the upper part of the actuator 10, and the lower part of the actuator 10 has an idling member so as to be rotatable around the output shaft 31 of the drive motor 30. 23 are arranged.

The free rotation member 23 is rotatably engaged with an arm member 44 of the planetary gear reduction mechanism 40 via an engagement protrusion 23a,
The biased end 23b for returning to the neutral position faces the neutral position protrusion 42b protruding from the input internal gear 42.

A return spring 2 is disposed in the cavity inside the base of the input internal gear 42.
4 is wound and arranged, and the return spring 24 is disposed between one end 24a and the other end 24b of the neutral position protrusion 4 of the input inner #4 gear 42.
2b and the biased end 23b of the free rotation member 23 are elastically clamped, and the positions of the neutral position protrusion 42b of the input inner @ gear 42 and the biased end 23b of the free rotation member 23 match, and both The members are biased to return to a relative neutral position.

Next, the effect will be explained.

Considering a certain state when the actuator 10 is not operating, the output member 11 is in the imaginary position shown in FIGS. corresponds to one end. The input internal gear 42 and the free rotation member 23 are located at a neutral position protrusion 42b.
and the biased end 23b are in a neutral position facing each other.

In FIG. 2, when the output member 11 is rotated clockwise, that is, the operated lever A2 of the locking mechanism A is manually operated.
When the planetary gear reduction mechanism 40 is activated, the entire planetary gear reduction mechanism 40 rotates clockwise together with the output shaft 12, and there is no resistance other than inertia, and the same is true when moving forward and then returning. It can be swung easily.

The operation of operating the output member 11 by the planetary gear reduction mechanism 40 is as follows.

When the drive motor 30 is started, the sun gear 41 is rotated by its output shaft 31, the first @ portion 46 of the planetary gear 45 meshes with the input internal gear 42, and the arm member 44 causes planetary motion. This planetary interlocking moves from the second tooth portion 47 to the output internal UF wheel 4.
The output internal gear 43 is greatly decelerated while being transmitted to the output internal gear 43.
rotates at a relatively slow speed.

The rotational reaction force of the input inward gear 42 of the planetary gear reduction mechanism 40 is generated when the engagement protrusion 42a is applied to one end 2 of the regulation groove 22 of the housing 20.
The receiver is placed in contact with 2a.

The output member 11 is rotated clockwise in FIG. 2.3 by the output Nao Uchiyama wheel 43, and the operated lever A2 of the locking mechanism A to be operated is moved via the connecting link AI.

While moving the output member 11 to the other end of its operating stroke,
The arm member 44 of the M star gear reduction mechanism 40 also rotates, and the rotation of the arm member 44 also rotates the free rotation member 23 via the engagement protrusion 23a.

When the free rotating member 23 rotates, in this case in a clockwise direction, the biased end 23b pushes the return spring 24 and the other g24b.

One end 24a of the return spring 24 is input! The biased end 23b of the free rotating member 23 rotates while being locked to the neutral position protrusion 42b of the mfil wheel 42 while pushing the other end 24b against the biasing force of the return spring 24. When the output member 11 moves the operated lever A2 of the locking mechanism A and reaches the other end of the operating stroke shown in FIG. 5, it stops, and the power to the drive motor 30 is cut off.

When the power to the drive motor 30 is cut off, the driving force is lost, so the biased end 23b of the free rotating member 23 returns to the spring 24.
After being pushed by the other end 24b and rotated, it reverses and begins to move counterclockwise.

The return operation of the free rotation member 23 is input to the arm member 44 of the planetary gear reduction mechanism 40 from the engagement protrusion 23a. tJ within the output
Since the fourth south gear is restrained and stopped by the output member 11, the input internal gear 42 rotates in the return direction, and eventually the biased end 23b of the free rotating member 23 and the input internal gear 42 rotate.
The operation is stopped at a relative neutral position where the neutral position protrusion 42b faces the neutral position protrusion 42b.

Since the return movement amount of the idle member 23 corresponds to the operating stroke of the output member 11, the return rotation amount of the input internal gear 42 corresponds to the set stroke, and the engagement protrusion of the input internal gear 42 42a is the regulation groove 2 as shown in FIG.
2 moves from one end 22a to the other end 22b and stops.

Considering the case where the output member 11 is rotated in the counterclockwise direction from this state, the planetary gear reduction mechanism 40 rotates integrally as described above, so the output member 11 can operate easily.

Contrary to the above, the same applies when the actuator 10 moves the object to be operated in the opposite direction from the other end of the operation stroke.

7 to 9 show the second embodiment. This embodiment is different from the first embodiment in that the first embodiment has an idling member 23 that rotates integrally with the arm member 44 and an input internal gear 42. In contrast to returning to a relative neutral position, the output internal gear and the free rotating member are returned to a relative neutral position.

In other words, the idler member 25 is moved to the output inner tli3tki vehicle 43.
An engaging protrusion 25 that is arranged concentrically with the free rotation member 25 and protrudes from the free rotation member 25.
a to the arm member 44, and the freely rotating member 25 and the arm member 44
and are designed to rotate together. The freely rotating member 25 is further provided with a biased end 25b for returning to the neutral position.

The output internal gear 43, which is concentric with the idling member 25, is provided with an output end 43a projecting from the upper part of the housing 20, and is further formed with a neutral position protrusion 43b corresponding to the biased end 25b.

A return spring 26 is wound and arranged in a cavity inside the output internal gear 43, and the return spring 26 has one end 26a and the other end 26.
The neutral position projection 43b of the output internal gear 43 and the biased end 25b of the free rotation member 25 are elastically clamped between the output internal gear IJ [neutral position projection 43b of the wheel 43 and the free rotation The position of the biased end 25b of the member 25 coincides with the biased end 25b, and the two members are biased so as to return to a relative neutral position.

The input internal gear 42 is provided with an engaging protrusion 42a and is rotatable between one end 22a and the other end 22b of the regulating groove 22 provided in the housing 20, unlike the first embodiment. The same is true.

In the second embodiment as well, when an operating force is applied to the output internal gear 43, which is the output member, to rotate it, the entire planetary gear reduction mechanism 40 rotates as one, and there is no resistance other than inertia.
Similarly, when moving forward and then returning, it can be swung easily.

The operation of the drive motor 30 as an actuator is the same as in the first embodiment, and the operation causes the biased end 25b of the free rotating member 25 and the neutral position protrusion 43b of the output internal gear 43 to be relatively displaced and returned. One end 26a and the other end 2 of the spring 26
6b are spaced apart along the circumference.

When the power to the drive motor 30 is cut off after the operation, the one end 26a and the other end 26b of the return spring 26 are returned by the biasing force, and the biased end 25b of the free rotating member 25 and the output tMm
The vehicle 43 returns to the relative neutral position where the position with the neutral position protrusion 43b matches.

Since the return movement amount of the free rotation member 25 corresponds to the movement stroke of the output internal gear 43, which is the output member, the input internal tl
The amount of return rotation of the i1 wheel 42 corresponds to the set stroke, and the engagement protrusion 42a of the input fJAm indicator 42 moves from one end 22a of the regulation groove 22 to the other end 22b and stops.

In this state, the entire planetary gear reduction mechanism 40 is rotatable as a unit, as described above, and can be easily followed when an operating force is applied to both output internal tM gears 3.

"Effects of the Invention" According to the actuator of the present invention, the drive from the actuator can be performed as necessary, and the movement from the object side can be made light without creating play in the movement transmission system. Because of this, it is possible to satisfy the function as an actuator, have a simple structure, and make it inexpensive, small, and lightweight.

[Brief explanation of drawings]

1 to 6 show a first embodiment of the present invention, in which FIG. 1 is a vertical cross-sectional view of an actuator, FIG. 2 is a conceptual diagram showing a state in which an operating object and an actuator are connected, and FIG. The figure is a cross-sectional view taken along line m-III in figure 1, and figure 4 is a sectional view taken along line IV-I in figure 1.
5 is a cross-sectional view taken along the line ■-■ in Figure 1 when one actuator is operated by the drive motor, and Figure 6 is a cross-sectional view taken along the line M-line in Figure 1 when the drive motor has returned. figure,
7 to 9 show the second embodiment, where FIG. 7 is a longitudinal sectional view of the actuator, FIG. 8 is a sectional view taken along the line 7 - 7, and FIG. 9 is a sectional view taken along line 7 - It is a sectional view taken along the IX line. 10... Actuator 11... Output member 20
...Housing 22...Regulation groove 23.25
...Free rotation member 24.26...Return spring 30...
- Driving motor 31... Output shaft 40... M star gear reduction mechanism 42... Input internal gear 43... Output Naoto Uchiyama 44... Arm member Fig. 3 Fig. 7 4, 3a

Claims (1)

[Scope of Claims] In an actuator having a planetary gear reduction mechanism driven by a driving motor and configured to reciprocate an object to be operated, the planetary gear reduction mechanism is connected to a sun gear fixed to the output shaft of the driving motor. , an input internal gear and an output internal gear respectively disposed concentrically with the sun gear; a first tooth portion that meshes with the sun gear and meshes with the input internal gear; a planetary gear having a second tooth portion that meshes with the sun gear and is supported so as to be able to move planetarily around the sun gear via an arm member, and the input internal gear is movably movable within a set stroke range of the actuator. A return spring is supported by the housing and stretched between one of the input internal gear or the output internal gear and the arm member of the planetary gear mechanism to return both to a relative neutral position. Characteristic actuator.