JPH03590Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to an actuator having a planetary gear reduction mechanism and reciprocating an object to be operated.

"Conventional technology" As a conventional actuator, for example,
There is one disclosed in Publication No. 60-220242.

That is, this publication discloses an actuator having a planetary gear reduction mechanism, and this actuator not only allows the actuator to operate an object to be operated, but also allows the object to operate without interfering with the actuator. It has a clutch mechanism.

``Problems that the invention aims to solve'' However, such conventional actuators require separate power and control to operate the clutch mechanism, making the structure not only complicated and expensive, but also large and large. There were problems in that it became bulky, increased weight, and was difficult to use.

The present invention was devised in view of these conventional problems, and aims to provide an actuator that is inexpensive, small, and lightweight.

"Means for Solving the Problems" The gist of the present invention to achieve such an objective is to provide an actuator that has a planetary gear reduction mechanism and that reciprocates an object to be operated, including a drive motor, An actuator is constituted by a planetary gear reduction mechanism that decelerates the rotational output of the drive motor, and an output relay mechanism that transmits the output of the planetary gear reduction mechanism to an operating target, and the planetary gear reduction mechanism is connected to the output shaft of the drive motor. a solid sun gear, a fixed input internal gear and an output internal gear that are freely rotatable and respectively disposed concentrically with the sun gear, meshing with the sun gear and meshing with the input internal gear; and a planet gear having a second tooth part meshing with the output internal gear and supported so as to be capable of planetary movement around the sun gear via an arm member, The mechanism connects the output internal gear so that a relay member connected to the output internal gear through a play corresponding to the operation stroke of the operation target and a relay member whose operation target side is moved are displaced within the play. The actuator is characterized by comprising a biasing means for holding the actuator in a neutral position.

"Operation" When the actuator operates the object, the output of the drive motor is decelerated by the planetary gear reduction mechanism, the output internal gear moves the relay member, and the relay member operates the object. . When the actuator is not operating, the biasing means holds the output internal gear in a neutral position, and the relay member is movable within the play of its operating stroke regardless of the planetary gear reduction mechanism, and the side to be operated is activated. Even if the relay member is moved, the planetary gear reduction mechanism does not operate, and the side to be operated can easily move.

"Embodiments" Hereinafter, various embodiments of the present invention will be described based on the drawings. Note that similar parts in each embodiment are designated by the same reference numerals, and redundant explanation will be omitted.

1 to 5 show a first embodiment of the present invention.

The actuator 10 has a driving motor 30 disposed at the base inside the housing 20.
A planetary gear reduction mechanism 40 is connected to the output shaft 31 of the output shaft 31, and relay mechanisms 50 are provided above and below the planetary gear reduction mechanism 40 in FIG.

As can be seen in FIGS. 1 and 5, the planetary gear reduction mechanism 40 includes a sun gear 41 fixed to the output shaft 31 of the driving motor 30, and is arranged concentrically with the sun gear 41 and tightly fitted into the housing 20. The input internal gear 42 is fixed, the output internal gear 43 is freely rotatable, and the arm member 44, which is plate-shaped as a part, is mechanically capable of planetary movement around the sun gear 41. It consists of a planetary gear 45 supported by.

The planetary gear 45 has a first tooth portion 46 that meshes with the sun gear 41 and the input internal gear 42 , and a second tooth portion 47 that meshes with the output internal gear 43 .

As can be seen in FIGS. 1 to 3, the relay mechanism 50 is located above the actuator 10 in the figures.
An output shaft 51 is loosely fitted into the output internal gear 43 , and a spiral relay member 52 is fixed to the output shaft 51 . Engaging ends 53 , 53 of the relay member 52 are fixed to the housing 20 . It is located between the stopper 21 and the engagement protrusion 43a fixed to the output internal gear 43.

The engagement ends 53, 53 have a play s between the engagement protrusion 43a of the output internal gear 43 in the neutral position and the stopper 21, which corresponds to the operating stroke of the operating target.
An output lever 54 is fixed to the output shaft 51.

Furthermore, as can be seen in FIGS. 1, 4, and 5, the relay mechanism 50 has an idling member 55 that is rotatable around the output shaft 31 of the drive motor 30 at the bottom of the actuator 10 in the figures. A biasing member 56 is disposed and engages with the free rotation member 55.

The free rotation member 55 rotatably engages with the arm member 44 of the planetary gear reduction mechanism 40 via an engagement protrusion 55a, and has a neutral position biased end 55b protruding from the housing 20. 22 is coming.

The biasing member 56 elastically clamps the neutral position protrusion 22 of the housing 20 and the biased end 55b of the free rotation member 55 between one end 56a and the other end 56b, and is wound inside the cavity in the housing 20. It is arranged by rotating.

Next, the action will be explained.

Considering a certain state when the actuator 10 is not operating, the output lever 54 is in the solid line position in FIG. 2, and the relay member 52 and its engaging end 53 are in the position shown in FIG. 3. The positions of the relay member 52, the engaging end 53, and the output lever 54 correspond to one end of the operating stroke of the operating target. The output internal gear 43 is in a neutral position where the engagement protrusion 43a faces the stopper 21 of the housing 20.

In FIG. 2, when the output lever 54 is rotated clockwise, the relay member 52 is also rotated clockwise, and one engagement end 53 engages the engagement protrusion 43a of the output internal gear 43 within the play s. move closer,
When the other engaging end 53 comes into contact with the stopper 21, it means that it has moved to the other end of the operating stroke. The movement of the engaging end 53 is not affected by the output internal gear 43 in either case of reciprocation, and the relay member 52 and the output lever 54 can be easily rotated regardless of the planetary gear reduction mechanism 40. .

The operation of operating the output lever 54 by the planetary gear reduction mechanism 40 is as follows.

When the drive motor 30 starts, its output shaft 31
The sun gear 41 rotates, and while the rotation is transmitted from the first tooth portion 46, the second tooth portion 47 of the planetary gear 45, and the arm member 44 to the output internal gear 43, the sun gear 41 is greatly decelerated. rotates at a relatively slow speed.

When the output internal gear 43 rotates clockwise from the state shown in FIG.
2, the relay member 52 and the output lever 54 are rotated clockwise while moving within the play s, and the output lever 54 moves the object to be operated.

While the output lever 54 is moved to the other end of the operating stroke, the arm member 44 of the planetary gear reduction mechanism 40 also rotates, and the rotation of the arm member 44 also causes the idler member 55 to rotate via the engagement protrusion 55a. Rotated. When the free rotating member 55 rotates, in this case in a clockwise direction, the biased end 55b is rotated by the biasing member 56.
The biased end 55b of the freely rotating member 55 moves while pushing the other end 56b and pushing the other end 56b against the biasing force of the biasing member 56 while keeping the one end 56a locked to the neutral position protrusion 22. do. In the case of operation in the opposite direction, the other end 56b remains and one end 56a moves.

When the output lever 54 moves the operating object and reaches the other end of the operating stroke, it stops, and the other engaging end 53 of the relay member 52 fills up the play s shown in FIG. 3 and creates a play s on the opposite side of the stopper 21. Then stop.
Power to the drive motor 30 is cut off. At this time, the engagement protrusion 43a of the output internal gear 43 is connected to the relay member 52.
The free rotation member 55 remains in contact with one of the engagement ends 53, and the free rotation member 55 is also in a rotated state.

When the power to the drive motor 30 is cut off, the driving force is lost, so the biased end 55b of the free rotating member 55
The urging member 56 is pushed by the other end 56b and begins to move from the rotated state to return to the neutral position shown in FIG.

The return operation of the idler member 55 is input from the engagement protrusion 55a to the arm member 44 of the planetary gear reduction mechanism 40, which operates the planetary gear reduction mechanism 40 and finally moves the output internal gear 43 in the return direction. Rotate.

When the biased end 55b of the free rotating member 55 returns to the original position shown in FIG. 4, the amount of return movement is the same as the amount of movement described above, so the engagement protrusion 43a of the output internal gear 43 is the same as described above. Return to neutral position. At this time, one engaging end 53 of the relay member 52 has rotated clockwise from the position shown in FIG. 3 and has stopped, so the play s is created at a position opposite to that shown in FIG. 3.
The output lever 54 is located at the phantom line in FIG. .

Here, considering the case where the output lever 54 is rotated counterclockwise, the relay member 52
Since the engaging end 53 moves within the play s, it can be rotated easily regardless of the planetary gear reduction mechanism 40.

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.

6 and 7 show a second embodiment. In this embodiment, the planetary gear reduction mechanism 40 is the same as that in the first embodiment, but the relay mechanism 50 is different.

That is, the relay mechanism 50 holds a protrusion 57 protruding upward from the arm member 44 and a biased protrusion 58 protruding downward from the output internal gear 43 between one ends 56a and 56b of the biasing member 56. be.

The relay member and the output member are supported movably in the axial direction on the side of the actuator 10 as an integrated relay output member 59, and the tip thereof is the output end 59.
It forms a. An engagement groove 59b is carved in the base of the relay output member 59, and the engagement end 43b extending from the output internal gear 43 engages with the engagement groove 59b of the relay output member 59 with a play s. There is.

Next, the operation of the second embodiment will be explained.

FIG. 6 shows a state in which the output internal gear 43 is in the neutral position, and the relay output member 59 is connected to the output end 59.
a is the most retracted and at one end of the operating stroke,
The output end 59a can be operated to protrude and then retracted, and can be operated easily regardless of the planetary gear reduction mechanism 40.

When the drive motor 30 is started, the rotation of the arm member 44 and the rotation of the output internal gear 43 differ in speed and amount, so the protrusion 57 and the biased protrusion 58 are connected to one end 56a of the biasing member 56. , are mutually displaced so as to widen the other ends 56b.

Due to the rotation of the output internal gear 43, the engagement end 43b pushes one end of the engagement groove 59b of the relay output member 59,
Relay output member 5 so that output end 59a protrudes
Move 9.

At the other end of the operating stroke, the drive motor 30
When stopped, the protruding piece 57 and the biased protrusion 58 begin to move due to the biasing force of the biasing member 56 to return to the original state shown in FIG.

When the state shown in FIG. 6 is restored, the relay output member 59
Since the output end 59a of the relay output member 59 remains protruding, the play s is formed at a position opposite to that in FIG. 6, but since the play s corresponds to the operating stroke of the relay output member 59, the relay output From the member 59 side, reciprocating operation can be performed within the play s regardless of the planetary gear reduction mechanism 40.

"Effects of the invention" According to the actuator of the invention, driving from the actuator can be performed as necessary, and the connection between the actuator and the object to be operated can be severed without providing a clutch, so that the actuator can be driven by the actuator from the side of the object to be operated. Since the actuator can be made light, it can fulfill the functions of an actuator, have a simple structure, and be inexpensive, small, and lightweight.

[Brief explanation of the drawing]

1 to 5 show a first embodiment of the present invention, in which FIG. 1 is a vertical sectional view of the actuator, and FIG.
The figures are also plan views, Figure 3 is a cross-sectional view taken along the line of Figure 1, Figure 4 is a cross-sectional view taken along the line of Figure 1, Figure 5 is a cross-sectional view taken along the line of Figure 1, and Figures 6 and 7 are Second
6 is a horizontal cross-sectional view of the actuator, and FIG. 7 is a cross-sectional view taken along the line shown in FIG. 6. 10...actuator, 20...housing, 21...stopper, 22...neutral position protrusion,
30... Driving motor, 31... Output shaft, 40 Planetary gear reduction mechanism, 42... Input internal gear, 43...
Output internal gear, 44 arm member, 45... planetary gear,
46...first tooth part, 47...second tooth part, 50...
Relay mechanism, 52... Relay member, 53... Engagement end,
54... Output lever, 55... Idle member, 56...
...Biasing member, 59...Relay output member.

Claims (1)

[Scope of Claim for Utility Model Registration] An actuator having a planetary gear reduction mechanism and configured to reciprocate an operating object, comprising: a drive motor, a planetary gear reduction mechanism that reduces the rotational output of the drive motor, and the planetary gear. An actuator is constituted by an output relay mechanism that transmits the output of the reduction mechanism to an operating target, and the planetary gear reduction mechanism includes a sun gear fixed to the output shaft of the driving motor, and a sun gear disposed concentrically with the sun gear, A fixed input internal gear and a rotatable output internal gear, a first tooth portion that meshes with the sun gear and meshes with the input internal gear, and a second tooth that meshes with the output internal gear. and a planetary gear supported through an arm member so as to be capable of planetary movement around the sun gear, and the output relay mechanism adjusts the output within the output through a play corresponding to the operating stroke of the operating object. An actuator characterized by comprising a relay member connected to a toothed gear, and a biasing means for holding the output internal gear in a neutral position so that the relay member whose operation target side is moved is displaced within the play. .