JPS6131756A - Transmitting device - Google Patents

Abstract

PURPOSE:To transmit highly accurately rotation in both directions by providing two sets of clutch and brake on a drive shaft to selectively connect and disengage the clutch and brake according to the respective rotational direction. CONSTITUTION:The output of a motor 21 is transmitted from a drive shaft 22 to the input side of a clutch 23 and further to a driven shaft 33 through pulleys 24, 31. Also, on the other hand, the rotation of the drive shaft 22 is transmitted to the input side of a clutch 28 and further to the driven shaft 33 through pulleys 27, 32. Thus, by connecting two sets of clutch and brake to the driven shaft can be transmitted the ration of the drive shaft highly accurately without any play.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a transmission device that can be used to transmit the rotation of a drive shaft whose rotational direction changes with high accuracy to a driven shaft without play or play. be.

Conventional configuration and problems thereof Hitherto, transmission by wire has often been used as one of the means for transmitting the output of a rotary drive shaft to a spatially separated driven shaft. Transmission devices using wires have advantages such as having simple components, being economical, being lightweight, and being able to freely choose the transmission path when used in combination with an outer wire, but due to looseness and play in the wire, precise transmission The disadvantage was that it was difficult. However, when used as a component of the currently used servo mechanism, etc.
Transmission devices using wires are also required to transmit rotation angles with high precision.

A conventional transmission device will be described below with reference to the drawings.

FIG. 1 is a perspective view of a conventional transmission device, in which 1 is a drive motor (hereinafter abbreviated as motor), 2 is a drive shaft, 3.5 is a pulley, 4 is a wire, and 6 is a driven shaft.

In this device, a pulley 3 is fixed to a drive shaft 2, and a pulley 5 is fixed to a driven shaft 6.

Therefore, when the motor 1 rotates, the rotation is transmitted from the pulley 3 to the pulley 5 via the wire 4. However, when transmitting rotation while changing the rotational direction of the motor, as is often the case with servo mechanisms, in the above configuration, the wire has a tension side and a slack side, so if the rotational direction is reversed, the wire will loosen and the rotation will not be accurate. There was a problem that the rotation angle was not transmitted.

FIG. 2 is a front view of another conventional transmission device, in which 11 is a motor, 12 is a drive shaft, 13, 16 is a pulley, 14 is a wire, and 15a+15b are outer wires. In FIG. 2, pulley 13 is fixed to drive shaft 12, and pulley 16 is fixed to driven shaft 17. When the motor 11 rotates, the pulley 13 rotates and the wire 14 is guided by the outer wires 1521, 15b and transmits the rotation to the pulley 16 to rotationally drive the driven shaft 17.However, in the above configuration, the When used in such a servo mechanism, there is a problem that the wire 14 and the outer wires 151, 15b are loosened due to the gap between them, and the rotation angle is not accurately transmitted.

OBJECTS OF THE INVENTION It is an object of the present invention to eliminate the above-mentioned drawbacks and to provide a transmission device that can transmit rotation with high precision.

Composition of the Invention The transmission device of the present invention includes a rotary drive shaft and a first rotary shaft for selectively transmitting the output of the drive shaft. a second clutch mechanism;
．． The first clutch mechanism is fixed to the rotational output side of the second clutch mechanism.
a second driving pulley; a first and second braking mechanism for braking the rotation of the second driving pulley; a driven shaft; and at least one or more driven bobbies fixed to the driven shaft; A first wire and a second wire are respectively fixed in the output rotation direction of the second driving pulley, and the spring wires are fixed to the driven pulley so that the other ends of the wires are opposite to each other. This configuration allows rotation to be transmitted with high precision.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 3a shows a side view of a transmission device in one embodiment of the present invention. FIG. 3A is a sectional view along line AA in FIG. 3a, and FIG. 3C is a sectional view taken along line BB in FIG. 3a. In Figure 3 B, 20 is the base, 21 is the motor,
22 is a drive shaft, 23, 2ai-i electromagnetic clutch (hereinafter abbreviated as clutch), 24.27 is a drive pulley, 25.2
6 is an electromagnetic brake (hereinafter abbreviated as brake), 29, 30
id wire, 31.32 is a driven pulley, 33 is a driven shaft, 34.36.36il-1: a board installed on the base.

The transmission device of this embodiment configured as above will be described in detail below.

In FIG. 3a, the output of the motor 21 is transmitted from the drive shaft 22 to the input side of the clutch 23, and when the clutch 23 is connected, the output side of the clutch 23 is transmitted to the pulley 24. Wire 29. It is transmitted to the driven shaft 33 via the pulley 31. At this time, since the winding direction of the wire 29 is as shown in FIG. 3, only counterclockwise rotation can be transmitted. On the other hand, the rotation of the drive shaft 22 is transmitted to the input side of the clutch 28, and when the clutch 28 is connected, the rotation of the drive shaft 22 is transmitted from the output side of the clutch 28 to the pulley 27. Wire 30. It is transmitted to the driven shaft 33 via the pulley 32. At this time, since the direction in which the wire 3o is wound is as shown in FIG. 4C, it is possible to transmit only the rotation around the clock.

Further, brakes 25 and 26 are fixed to the board 35, and can selectively apply braking to the pulleys 24 and 27. Therefore, if the motor rotates counterclockwise, the sea 4 clutch 23
, disconnect the brake 25, and connect the pulley 24. Wire 29. The driven shaft 33 can be driven via the pulley 31, and at this time, the clutch 28 is simultaneously disengaged and the brake 2
6, the wire 30 is wound around the pulley 32 under tension.

Therefore, the next time the motor 21 rotates in the opposite direction and starts rotating around 31, the clutch 28 is connected and the brake 2
If 6 is cut, pulley 27. Wire 30° pulley 3
2, the rotation is immediately transmitted to the driven shaft 33, and there is no looseness of the wire or looseness due to play. At the same time, the clutch 23 is disengaged, the brake 25 is activated, and back tension is applied to the wire 29 so that it is wound around the pulley 31.

As described above, according to this embodiment, by connecting two sets of clutches and brakes to the drive shaft, the rotation of the drive shaft can be transmitted with high precision without play.

In the above embodiment, the clutch is an electromagnetic clutch, but any clutch may be used as long as it can selectively transmit rotation depending on the direction of rotation. The brake is not limited to an electromagnetic brake, for example, a friction brake can also be used. In order to freely choose the transmission route, 29.30
Even if an outer wire as shown in FIG. 2 is used in conjunction with the wire transmission section, rotation can be transmitted with high precision without play, as in the present embodiment. Two small driven pulleys are not necessarily required, and depending on the configuration, one may be required. 7. Effects of De and Akira As is clear from the explanation in 1-, the present invention/'i drive+
The lQl+ is equipped with a two-thread clutch and brake, and is configured to selectively connect and disconnect the clutch and brake depending on the direction of rotation, ensuring high accuracy and no backlash due to loose wires or play. This provides an excellent effect of realizing rotational transmission in both directions.

Furthermore, even when an outer wire is used to freely select the transmission path, the same effect can be obtained in that highly accurate transmission is possible.

[Brief explanation of the drawing]

1M is a perspective view of a conventional transmission device, FIG. 2 is a front view of another conventional transmission device, and FIGS. 3a, b, and c are side views of a transmission device according to an embodiment of the present invention. FIG. 1 is a partial sectional view. 21...Motor, 22...Drive shaft, 23. 2
8... Electromagnetic clamper, 24.27... Drive pulley, 25, . 26... Electromagnetic brake, 29+
30...Wire, 31.32...
Driven pulley, 33... Driven shaft. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 (b) (C)

Claims (6)

[Claims] (1) A rotation drive shaft, first and second clutch mechanisms that selectively transmit the output of the drive shaft, and first and second clutch mechanisms fixed to the rotation output sides of the first and second clutch mechanisms. a second driving pulley, first and second braking mechanisms for braking the rotation of the first and second driving pulleys, a driven shaft, and at least one driven pulley fixed to the driven shaft. and a first and a second drive pulley whose one end is wound and fixed in the output rotation direction of the first and second driving pulleys, and the other end is wound and fixed around the driven pulley so that the winding directions are opposite to each other. A transmission device comprising a wire. (2) The wire is coaxially guided in the longitudinal direction to a tubular flexible pipe body, and the pipe body is more flexible than the wire. The transmission device according to item 1. (3) The first and second clutch mechanisms are one-way clutches that are coaxially attached to the drive shaft so that the driving force transmission directions are opposite to each other. Alternatively, the transmission device according to item 2. (4) The transmission device according to claim 1 or 2, wherein the first and second clutch mechanisms are electromagnetic clutches. (5) The transmission device according to any one of claims 1 to 4, wherein the first and second braking mechanisms are friction brakes. (6) The transmission device according to any one of claims 1 to 4, wherein the first and second braking mechanisms are braking mechanisms that can selectively perform braking.