JPH08277901A - Output actuator of linear rotational motion - Google Patents

Abstract

PURPOSE: To enable solely linear motion to be taken out in the range of specified rotation in an actuator which obtains both of the linear motion and rotational motion with one drive member, by providing the actuator with an output member of rotational motion which performs the rotation motion through a first gear member having an idling range and an output member of linear motion which performs the linear motion through a second gear member. CONSTITUTION: When a first gear 3 rotates in the direction of L1, a rotation shaft 5 is not rotated on account of idling of a one way clutch 7. With respect to transmission of the rotation of the first gear 3 to a second gear 4, in such condition as an idling range 33 is positioned opposedly facing with an idling range 42A of the second gear 4, the second gear 4 is left in such condition as not to rotate for the time being. Following the advance of the rotation of the first gear 3, the transmission zone 31 (41A) of each gear 3 (4) engages, and the second gear 4 starts to rotate in the direction of R2. The rotation is sequentially transmitted to a one way clutch 8, a cam 62, and a direct moving case 64 to move a slider 6 in the linear direction. The linear motion of the slider 6 is not performed in the case of rotation of the first gear 3 in the direction of R1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear rotary motion output actuator which can obtain two motion outputs in a linear direction and a rotary direction with a single driving member.

[0002]

2. Description of the Related Art Conventionally, many devices for converting a rotary motion by a driving member such as a motor into a linear motion have been introduced.
For example, in the device disclosed in Japanese Utility Model Laid-Open No. 2-67545, a sliding pin rotated by a rotating body is fitted into a sliding groove of a slider as a linear motion output member to output a linear motion. According to the above-mentioned device, two outputs, linear motion and rotary motion, can be obtained by providing the rotary member and the slider with an output member. However, when the rotary member rotates, the slider always moves linearly. And the output of the linear motion could not be obtained independently. In order to solve this, a method of providing a one-way clutch between the rotating body and the rotary motion output member has been considered. With this device, the output of the rotary motion output member and the output of the linear motion output member can be independently obtained by changing the rotation direction of the rotating body.

[Problems to be Solved by the Invention]

Although it has become possible to independently obtain the outputs of the rotary motion output member and the linear motion output member by the linear rotary motion output actuator having the above structure,
When the rotating body rotates, the linear motion output member always moves, or it does not move at all. That is, the motion of moving the linear motion output member only when the rotary motion output member reaches a certain range has not been possible yet.

In view of the above facts, the present invention provides a linear rotary motion output actuator in which one driving member can obtain two motions in a linear direction and a rotational direction, and a linear rotary motion in which only the linear output member moves within a certain rotation range. The purpose is to obtain an output actuator.

[0005]

A first linear rotary motion output actuator of the present invention comprises a drive member and a disk shape,
A pitch circle which is rotated by the drive member and has a plurality of involute teeth on a part of its circumference and both ends of which are grooves, and a circumference of the circle other than the first transmission area is a circle without involute teeth. A first gear member having one idling region, a second transmission region meshing with the first transmission region and having one more involute tooth than the number of teeth of the first transmission region, and the first idling region facing each other. Then, the second gear member in which the second idle region for one pitch of the involute teeth is provided on the peripheral surface for each idle transmission of the second transmission region, and the central shaft of the first gear member is connected to the first gear member. And a linear motion output member which is connected to the second gear member and linearly moves according to the rotation of the second gear member.

A second linear rotary motion output actuator of the present invention is characterized in that a first one-way clutch is provided between the first gear member and the rotary motion output member.

A third linear rotary motion output actuator of the present invention is characterized in that a second one-way clutch is provided between the second gear member and the linear motion output member.

In a fourth linear rotary motion output actuator of the present invention, when the position of the second idle region is opposite to the first gear member, the linear motion output members are located at both ends of the linear motion stop position. Is characterized by.

[0009]

In the first linear rotary motion output actuator of the present invention, when the drive member operates, the first gear member rotates and the rotary motion output member rotates. Further, when the involute teeth of the first transmission area provided in a part of the circumference which is the transmission area of the first gear member mesh with the involute teeth of the second transmission area, the second gear member rotates and the linear motion output member Moves linearly. The number of involute teeth in the second transmission area is one more than the number of involute teeth in the first transmission area, which is closer to the driving member, and both ends of the first transmission area are grooves. By engaging the involute teeth in the transmission area, it is possible to mesh well in both directions. When these engagements are completed, the first idling area of the first gear member and the second idling area of the second gear member face each other. Since these idling regions do not mesh, the second gear member does not rotate even if the first gear member rotates. Therefore, the linear motion output member also does not move. Then, when the involute teeth of the first transmission region of the first gear member approach the idling region of the second gear member, the involute teeth of the first transmission region scratch the involute teeth of the second transmission region and the second gear member rotates again. Then, the linear motion output member linearly moves. That is, when the first transmission area of the first gear member faces the second transmission area of the second gear member, the linear motion output member linearly moves.

In the second linear rotary motion output actuator of the present invention, since the first one-way clutch is provided between the first gear member and the rotary motion output member, the rotary motion is changed by changing the rotational direction of the drive member. Move or stop the output member.

In the third linear rotary motion output actuator of the present invention, since the second one-way clutch is provided between the second gear member and the linear motion output member, the linear motion is changed by changing the rotational direction of the drive member. Move or stop the output member.

In the fourth linear rotary motion output actuator of the present invention, when the second idling region faces the first gear member, the second gear member does not rotate and therefore the linear motion output member also does not move. At this time, since the linear motion output member is located at both ends of the linear motion stop position, the linear motion output member stops at both ends of the linear motion stop position.

[0013]

As described above, in the linear rotary motion output actuator according to the present invention, the rotary motion output member and the linear motion output member can output independently. Further, it is possible to obtain a linear rotary motion output actuator in which only the linear motion output member moves in a certain rotation range.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a linear rotary motion output actuator according to the present invention is shown in FIGS. 1 to 4, and these embodiments will be described with reference to the drawings.

The linear rotary motion output actuator 1 according to the first embodiment shown in FIG. 1 includes a motor 2 as a driving member.
A first gear 3 which is a first gear member, a second gear 4 which is a second gear member, a rotary shaft 5 which is a rotary motion output member, and a slider 6 which is a linear motion output member. There is. A first one-way clutch 7 is provided between the first gear 3 and the rotary shaft 5, and a second one-way clutch 8 is provided between the second gear 4 and the slider 6.

The motor 2 has a motor shaft 21 and serves as a rotation output shaft of the motor 2.

The first gear 3 is a disk-shaped gear, and a motor shaft 21 is connected to the center of the first gear 3. The first gear 3 also rotates in the same direction as the motor 2 rotates. First gear 3
A plurality of involute teeth 31 are provided on a part of the circumference of the first transmission area 32 as a transmission area of the gear. Both ends of the first transmission area 32 are grooves 34. Further, the circumference other than a part of the circumference of the first gear 3, that is, the circumference where the first transmission area 32 is not provided is the first idling area 33. The first idling area 33 is a pitch circle of the first gear 3.

Next, the second gear 4 has a second transmission area 41 that meshes with the first transmission area 32 and that has the number of involute teeth 43 added to the first transmission area 32 by one. Then, each time one second transmission area 41 is provided, a second idle rotation area 42 in which one involute tooth is not provided is provided. When the second idling region 42 faces the first idling region 33, the involute teeth 43 of the second transmission region 41
Is provided so as to contact the peripheral surface of the first idling area 33. In this embodiment, since the two transmission areas 41, that is, the second transmission area 41A and the second transmission area 41B, are provided, the respective second idling areas 42 corresponding to the transmission area 41 are the second idling area 42A and the second idling area 42A. It is the second slipping region 42B. According to FIG. 1, the arrangement in the right direction based on the second transmission area 41A is the second transmission area 41A, the second idling area 42A, the second transmission area 41B, and the second idling area 42B.

Next, the rotary shaft 5 is connected to the center of the first gear 3, and in this embodiment, it is provided on the opposite side of the surface on which the motor shaft 21 is provided. Then, a load (not shown) for obtaining a rotational output is coupled to the rotary shaft 5.

Next, the slider 6 comprises a transmission shaft 61, a cam 62, a linear motion case 63, and a guide case 64. The transmission shaft 61 is connected to the center of the second gear 4 and rotates as the second gear 4 rotates. And
The rotation of the transmission shaft 61 causes the fan-shaped cam 62 to rotate, so that the square linear motion case 63 surrounding the cam 62 is guided by the guide case 64 and moves linearly. A load (not shown) for obtaining a linear motion output is coupled to the linear motion case 63. When the linear motion case 63 is located at the one end and the other end that are moved in the most linear direction, the second idling area 42A and the second idling area 42B of the second gear 4 are the same as the first idling area 33 of the first gear 3. Located in the opposite location.

Next, the first one-way clutch 7 is provided between the first gear 3 and the rotary shaft 5. In the case of the first embodiment shown in FIGS. 1 to 4, when the motor 2 is driven so that the first gear 3 rotates in the direction R1 (right in the drawing), the results are shown in FIGS. 2 (A) (B) (C). Thus, the first one-way clutch 7 transmits the rotation to the rotary shaft 5, and the rotary shaft 5 also rotates in the R1 direction. Conversely, the first gear 3 is L1
When the motor 2 is driven so as to rotate in the (left side of the drawing), the first one-way clutch 7 is attached to the rotating shaft 5 as shown in FIGS. 3 (A), (B), (C) and FIGS. 4 (A), (B). The rotation shaft 5 does not rotate because it rotates idly so as not to transmit the rotation.

Next, the second one-way clutch 8 is provided between the transmission shaft 61 and the cam 62. In the case of the first embodiment shown in FIGS. 1 to 4, when the motor 2 is driven so that the first gear 3 rotates in the direction R1 (right in the drawing), the results are shown in FIGS. 2 (A) (B) (C). Thus, the second gear 4 and the transmission shaft 61 rotate in the L2 (left in the drawing) direction. However, this rotation is not transmitted to the cam 62 because the second one-way clutch 8 idles, and the slider 6 does not move. On the contrary, when the motor 2 is driven so that the first gear 3 rotates in the direction of L1 (left in the drawing), FIG.
(C) As shown in FIGS. 4 (A) and 4 (B), the second gear 4 is R2.
Rotate in the (right) direction. Then, the second one-way clutch 8 transmits this rotation to the transmission shaft 61 and the slider 6 moves.

The operation of each member in accordance with the rotation direction of the motor 2 in the above embodiment is shown in FIGS.
Follow the explanation below. It is to be noted that an end portion of the first transmission region 32 in the first gear 3 in the L1 direction is W, and a view when this W is located in the upper portion in FIG. 1 is shown in FIG. 1, and W is located in the upper portion. Will be described below as the origin.

First, as shown in FIG. 2, the first gear 3 is R1.
The operation state when the motor shaft 21 is driven in the R1 direction so as to rotate in the direction will be described. First, FIG.
As shown in (A), when the first gear 3 rotates in the R1 direction, the rotary shaft 5 rotates in the R1 direction via the first one-way clutch 7, and a rotation output is obtained. At this time, the first idle region 33 of the first gear 3 and the second idle region 42 of the second gear 4
A faces each other, and the second gear 4 does not rotate for a while even if the first gear 3 rotates. (W is located in the idling range to the left of the origin) As the rotation of the first gear 3 proceeds, as shown in FIG. 2 (B), the first transmission area 32 and the second gear 32 of the first gear 3 The second transmission area 41B of No. 4 meshes. When the second idling area 42 faces the first idling area 33, the tips of the involute teeth 43 of the second transmission area 41 are provided so as to be in contact with the peripheral surface of the first idling area 33. Engage smoothly without misalignment. In meshing, the involute teeth 43 enter the groove 34, and the involute teeth 31 and the involute teeth 4 are successively inserted.
3 and 3 mesh. When the meshing starts, the second gear 4 moves to L2.
Begins to rotate in the direction. However, the rotation of the second gear 4 is transmitted to the transmission shaft 61, but not to the cam 62 by the second one-way clutch 8. Therefore, the slider 6 does not move. When the rotation of the first gear 3 further proceeds, the first idling area 33 of the first gear 3 and the second idling area 42B of the second gear 4 are opposed to each other, and even if the first gear 3 rotates. The second gear 4 does not rotate. As the rotation of the first gear 3 progresses, as shown in FIG. 2C, the first transmission area 32 (W is located at the origin) and the second transmission area 41A mesh with each other. Further, as the rotation of the first gear 3 progresses, FIG.
The state returns to that shown in FIG.

Next, the operation state when the motor shaft 21 is driven so that the first gear 3 rotates in the L1 direction as shown in FIGS. 3 and 4 will be described. First gear 3 is L
When rotating in one direction, the first one-way clutch 7 idles and does not transmit the rotation to the rotating shaft 5. Therefore, the rotary shaft 5 does not always rotate. On the other hand, regarding the transmission from the rotation of the first gear 3 to the second gear 4, in the state of FIG. 3A (W is located at the origin), the first idle region 33 of the first gear 3 and the second gear 4 are transmitted. The second idle rotation area 42A of the second gear 4 faces each other, and the second gear 4 does not rotate for a while even if the first gear 3 rotates. After that, as the rotation of the first gear 3 progresses, as shown in FIG.
As shown in (B), the first transmission area 31 of the first gear 3 and the second transmission area 41A of the second gear 4 mesh with each other (W is located in the right transmission area from the origin). When the meshing starts, the second gear 4 starts rotating in the R2 direction. Then, the rotation of the second gear 4 is transmitted to the transmission shaft 61, the second one-way clutch 8, the cam 62, and the linear motion case 64 to move the slider 6. As the rotation further progresses, as shown in FIG. 3C, the first idling area 33 of the first gear 3 (W is located in the idling area on the left side of the origin).
And the second idling area 42B of the second gear 4 face each other, and the second gear 4 does not rotate even if the first gear 3 rotates. Further, as the rotation of the first gear 3 progresses, as shown in FIG.
The state shown in (A) (W is located in the right transmission range from the origin) is restored. This causes the first transmission area 31 of the first gear 3 and the second transmission area 41B of the second gear 4 to mesh with each other. When the meshing starts, the second gear 4 starts rotating in the R2 direction. Further, as the rotation of the first gear 3 progresses, the state becomes as shown in FIG. 3B (W is located in the idling range to the left of the origin). The first idling area 33 of the first gear 3 and the second idling area 42A of the second gear 4 face each other, and the second gear 4 does not rotate even if the first gear 3 rotates.

According to the above description, when the first gear 3 rotates in the R1 direction, the rotary shaft 5 rotates and a rotary motion output is obtained, and the slider 6 does not move and a linear motion output cannot be obtained. When the first gear 3 rotates in the L1 direction, the rotary shaft 5 does not rotate and no rotary motion output is obtained, and the slider 6 moves at a portion where the first gear 3 exists and a linear motion output is obtained. As a result, by using the linear rotary motion output actuator 1, the rotary output and the linear output can be independently obtained.

When the second gear 4 faces the first gear 3, the second gear 4 does not rotate, and the slider 6 does not move. At this time, since the slider 6 is located at both ends of the linear motion stop position as shown in FIGS. 3 (C) and 4 (B),
The slider 6 stops at both ends of the linear motion stop position. However, in order to maintain this operating state, the second gear 4 and the cam 62
It is necessary to set the positional relationship of 1 first and not change the rotation direction of the first gear 3 when the first transmission region 31 and the second transmission region 41 are meshed. When the transmission shaft 61 and the cam 62 are directly connected without using the second one-way clutch 8, the above need not be mentioned.

Although both the first one-way clutch 7 and the second one-way clutch 8 are provided in the above embodiment, an embodiment in which either one or both are not used is also conceivable. In this case, the output is obtained from the rotary shaft and the linear motion case regardless of the rotation direction of the motor.

Next, a second embodiment will be described with reference to FIG. The slider 6 of the second embodiment has a bar-shaped cam 62a. According to the cam 62a of the second embodiment, the linear motion case 63 moves rapidly in the linear direction.
In the case of the fan-shaped cam 62 of the first embodiment, the linear motion case 63 gradually moves in the linear direction as the motor rotates.

Next, a modification of the second embodiment is shown in FIG. In this, a recess 65 is provided on a part of the side surface of the guide case 64, and a spring 66 whose center projects in a mountain shape is arranged therein. Then, a convex portion 67 is provided on the side surface of the linear motion case 63, and the convex portion 67 rapidly moves in the linear movement direction inside the concave portion 65 with the mountain of the spring 66 as a boundary. The linear motion case 63, which is a linear motion output member, rapidly moves in the linear motion direction as the motor 2 rotates. As a result, the stop position of the linear motion case 63 is accurately stopped at both ends of the linear motion stop position, and the positioning accuracy of the stop position is improved.

Next, a third embodiment will be described with reference to FIG. The slider 6 of the third embodiment has a rotating body 62c having a pin 62b and a sliding groove 63a for receiving the pin 62b.
And a guide case 64. According to this structure, the linear motion case 63b moves more linearly with the rotation of the motor than in the first embodiment having the fan-shaped cam.

Next, a modified example of the third embodiment is shown in FIG. Similarly to the modification of the second embodiment, the linear motion output member 63b, which is a linear motion output member, rapidly moves in the linear motion direction as the motor 2 rotates. In this modification, a concave portion 65 is provided on a part of the side surface of the guide case 64, and a spring 66 whose center projects in a mountain shape is arranged therein. Then, the convex portion 67 provided on the side surface of the linear motion case 63b is provided inside the concave portion 65 provided on a part of the side surface of the guide case 64.
The spring 66 suddenly moves in the linear movement direction with the mountain of the spring 66 as a boundary. As a result, as in the case of FIG. 5B, the stop position of the linear motion case 63 accurately stops at both ends of the linear motion stop position, and the positioning accuracy of the stop position improves.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a first embodiment of a linear rotary motion output actuator according to the present invention.

FIG. 2 is an operation diagram showing operations (A), (B), and (C) when the first gear of the first embodiment of the linear rotary motion output actuator according to the present invention is rotated in the R1 (right) direction. Is.

FIG. 3 is an operation diagram showing operations (A), (B), and (C) when the first gear of the first embodiment of the linear rotary motion output actuator according to the present invention is rotated in the L1 (left) direction. Is.

FIG. 4 shows the first gear of the first embodiment of the linear rotary motion output actuator according to the present invention, further including L1 from the state of FIG.
It is an operation figure which showed the operation when rotating in the (left) direction as (A) and (B).

FIG. 5A is a second embodiment of a linear rotary motion output actuator according to the present invention, and FIG. 5B is a modification of the second embodiment.
FIG. 9 is a configuration diagram showing a third embodiment in (C) and a modified example of the third embodiment in (D).

[Explanation of symbols]

 1 Linear Rotational Motion Output Actuator 2 Motor (Drive Member) 3 First Gear (First Gear Member) 31 Involute Tooth 32 First Transmission Area 33 First Idle Rotation Area 34 Groove 4 Second Gear (Second Gear Member) 41 Second Transmission area 42 Second idling area 43 Involute teeth 5 Rotating shaft (rotational motion output member) 6 Slider (linear motion output member) 7 First one-way clutch 8 Second one-way clutch

Claims (4)

[Claims] 1. A drive member, a first transmission region which is disk-shaped, is rotated by the drive member, has a plurality of involute teeth on a part of its circumference, and has grooves at both ends, and the first transmission region. A first gear member having a first idling region which is a pitch circle having no involute teeth on the circumference other than, and the first transmission region having one more involute tooth than the number of teeth of the first transmission region. A second gear member in which a second idle region corresponding to one pitch of the involute teeth for each second idle region is provided on the circumferential surface, the second gear region being in opposition to the second idle region and the first idle region engaging with A rotary motion output member that is connected to the central axis of the first gear member and that rotates by the rotation of the first gear member, and a linear motion output member that is connected to the second gear member and that moves linearly by the rotation of the second gear member. And a linear rotary motion output actuator having 2. The linear rotary motion output actuator according to claim 1, further comprising a first one-way clutch between the first gear member and the rotary motion output member. 3. The linear rotary motion output actuator according to claim 1, further comprising a second one-way clutch provided between the second gear member and the linear motion output member. 4. The straight line according to claim 1, wherein the linear motion output member is located at both ends of the linear motion stop position when the position of the second idling region faces the first gear member. Rotational motion output actuator.