JPH11201239A - Reduction gear with manual operation shaft - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reduction gear with a manual operation shaft capable of manual operation safely in a power failure, inspection work and the like. SOLUTION: A one way-clutch 8 is provided on a pair of gears 7 connecting an output shaft 4 and a manual operation shaft 6 to each other. A braking clutch 10 is provided on a speed change shaft 3 which is installed facing the output shaft 4. This structure makes the output shaft 4 idle to the pair of gears 7 by the one-way clutch 9 even when power exists from an input shaft 2 during the operation of a manual operation lever 19 to prevent the swinging of the manual operation lever 19. The torque to be transmitted from the output shaft 4 side is used to brake the rotation of the speed change shaft 3 on the output shaft 4 side by the braking clutch 10 to prevent the reverse rotation of the manual operation shaft 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speed reducer with a manually operated shaft that can manually drive an output shaft at the time of failure or inspection.

[0002]

2. Description of the Related Art Conventional reduction gears with manually operated shafts include:
The one shown in FIG. 2 has been proposed. Reduction gear 50 of FIG.
Is a three-stage type that is applied to an electric drive unit or the like used for a load such as a power circuit breaker, an electric door, or a winch and outputs power at a predetermined torque and rotation speed.
The reduction gear 50 includes an input shaft 51, an output shaft 52,
1 and 52, two transmission shafts 53 arranged in parallel,
A manually operated shaft 56 connected to the output shaft 52 via a bevel gear pair 55, and a manually operated lever 57 removably provided on the manually operated shaft 56. In the speed reducer 50, the power from the input shaft 51 is transmitted to the output shaft 52 at a predetermined torque and rotation speed by each transmission gear and pinion gear pair 54, and is output to a desired load-side device. Further, at the time of power failure, failure, or operation check, the output shaft 52 is manually driven via the bevel gear pair 55 by operating (rotating) the manual operation lever 57.

[0003]

However, in the conventional speed reducer with a manually operated shaft 50, since the manually operated shaft 56 (manually operated lever 57) is connected to the output shaft 52 by the pair of bevel gears 55, the manual operation is reduced. When the electric drive unit is operated due to unexpected energization or the like while the lever 57 is being operated, the power of the input shaft 51 is transmitted to the manually operated shaft 56 via each of the transmission gear / pinion gear pair 54, the output shaft 52, and the bevel gear pair 55. And the manual operation lever 57 is swung to be dangerous. When the load on the output shaft 52 side is large or gradually increased, the output shaft 52 is reversely rotated by this load side, and a reverse rotation torque is applied to the manually operated shaft 56 via the bevel gear pair 55 to manually operate the shaft. The inconvenience of reversely rotating the operation lever 57 has also occurred.

[0004] It is an object of the present invention to provide a speed reducer with a manually operated shaft which can be safely operated manually during a power outage or an inspection work.

[0005]

According to a first aspect of the present invention, there is provided a speed reducer with a manually operated shaft, wherein one or a plurality of speed change shafts arranged in parallel between an input shaft and an output shaft are provided on each of the shafts. A multi-stage transmission gear pair for connecting these shafts to each other and transmitting the power from the input shaft as a predetermined torque and rotation speed to the output shaft; and manually driving the output shaft connected to the output shaft. In the speed reducer with a manually operated shaft to be provided with a manually operated shaft, the output shaft is idled in one direction with respect to the manually operated shaft between the output shaft and the manually operated shaft by power from the input shaft side. A one-way clutch for connecting the output shaft and the manually operated shaft by rotation in the other direction of the output shaft, and idling the transmission shaft with power from the input shaft side on any of the transmission shafts. Braking to stop the rotation of the transmission shaft by transmitting torque from the output shaft side. Those formed by arranging a latch.
When the manually operated shaft is reversed with respect to the rotation of the output shaft in the other direction via the manually operated lever, the output shaft can be manually driven by locking the one-way clutch. If there is output from the input shaft during operation of the manual operation lever, the output shaft is idled with respect to the manual operation shaft by the one-way clutch, so that the power of the input shaft is not transmitted to the manual operation shaft, Swinging the manual operation lever can be prevented. The reverse rotation torque transmitted from the load side of the output shaft to the manually operated shaft and the transmission shaft can lock the transmission shaft rotated by the reverse rotation torque with the brake clutch, thereby preventing reverse rotation of the manually operated shaft. it can.

According to a second aspect of the present invention, in the first aspect, the transmission gear and the transmission shaft are connected by a power from the input shaft to a transmission shaft arranged in parallel to the output shaft. A one-way clutch for relatively rotating the transmission gear and the transmission shaft by transmitting torque from the output shaft side is provided. By operating the manual operation lever, the transmission shaft on the output shaft side can be disconnected from the input shaft side by the one-way clutch, so that the operation torque can be reduced.

According to a third aspect, in the first aspect, the manual operation shaft is connected to the output shaft via a manual gear pair, and the manual gear pair is driven by power from the input shaft side. A one-way clutch for rotating the output shaft in one direction with respect to the manual gear pair and connecting the output shaft and the manual gear pair by rotation in the other direction of the output shaft is provided. The manually operated shaft can be connected to the output shaft via a manual gear pair, and having a one-way clutch in this gear pair can prevent power from the input shaft from being transmitted to the manually operated shaft.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a speed reducer with a manually operated shaft according to an embodiment of the present invention.

In FIG. 1, a speed reducer 1 with a manually operated shaft is shown.
Exemplifies a three-stage speed reducer that outputs power to a load-side device after converting power to a predetermined torque / rotational speed in three stages. However,
The number of speed reduction stages by the speed reducer 1 is not limited to three, but may be two, four or more. Reduction gear 1
The input shaft 2 connected to a drive electric unit or the like serving as a power source, two transmission shafts 3, an output shaft 4 connected to a load such as a power circuit breaker or an electric door, and each of these shafts 2 And a three-stage transmission / pinion gear pair 5 for connecting
A manual operation shaft 6 for manually driving the output shaft 4 and a bevel gear pair 7 for connecting the output shaft 4 and the manual operation shaft 6 are provided. Further, each of the bevel gear pair 7 and the speed change shaft 3 on the output shaft 4 side is provided. One-way clutches 8 and 9 and a braking clutch 10 arranged on the transmission shaft 3 on the output shaft 4 side.

The input shaft 2, the transmission shafts 3 and the output shaft 4
The shafts 2 to 4 are rotatably supported via bearings in this order, and the shafts 2 to 4 are connected to each other by a three-stage transmission gear / pinion gear pair 5. The input shaft 2 has a transmission pinion gear 11 formed at its tip. The input shaft 2 meshes with the transmission gear 12 of the transmission shaft 3 on the input shaft 2 side to form a transmission gear / pinion gear pair 5 and is connected to the transmission shaft 3. ing.
The transmission shafts 3 are connected to each other to form a transmission gear / pinion gear pair 5 by meshing a transmission pinion gear 13 formed on the transmission shaft 3 on the input shaft 2 side with a transmission gear 14 on the output shaft 3 side. I have. The output shaft 4 includes a transmission gear 15 formed at the end of the transmission shaft 3 on the output shaft 4 side.
The transmission gear / pinion gear pair 5 is formed by meshing with the transmission shaft 3. With this configuration, the power from the input shaft 2 is output to the output shaft 4 at a predetermined torque and rotation speed by the three-stage transmission gear and pinion gear pair 5 of each of the shafts 2 to 4.
And output to the load side by rotation of the output shaft 4 in one direction (counterclockwise).

The bevel gear pair 7 has one bevel gear 17
Is externally fitted to the output shaft 4 via the one-way clutch 8, and another bevel gear 18 is fixed to the lower end of the manually operated shaft 6. The one-way clutch 8 causes the output shaft 4 that is rotated in one direction (counterclockwise) by power transmission from the input shaft 2 side to idle without being connected to the manually operated shaft 6, and rotates in the other direction ( The output shaft 4 is connected to the bevel gear 17 (manually operated shaft 6) by locking the clockwise rotation. With this configuration, the power from the input shaft 2 side is blocked from being transmitted to the manually operated shaft 6 by the one-way clutch 8,
Even if power is suddenly transmitted from the input shaft 2 during operation of the manual operation lever 19, the manual operation lever 19 can be prevented from swinging. Also, the manual operation lever 19 is rotated so as to be opposite to the one-way rotation of the output shaft 4 (clockwise rotation).
Then, the bevel gear pair 7 and the output shaft 4 are connected by the one-way clutch 8, so that the output shaft 4 can be manually driven in one direction (counterclockwise) by the operation force of the manual operation lever 19.

The one-way clutch 9 is disposed in the transmission gear 14 of the transmission shaft 3 provided in parallel with the output shaft 4 so as to connect the transmission gear 14 to the transmission shaft 3 with power from the input shaft 2 side. The transmission shaft 3 is locked and connected, and the transmission shaft 3 is rotated in the other direction (clockwise) with respect to the transmission gear 14 by the reverse rotation torque from the output shaft 4 side. With this configuration, the power from the input shaft 2 can be transmitted to the output shaft 4 via the transmission gear 14 and the transmission pinion gear 16, and the reverse torque transmitted from the load connected to the output shaft 4 is transmitted to the input shaft 2. Can be disconnected by the one-way clutch 9. When the output shaft 4 is rotated in one direction (counterclockwise) by moving the manual operation lever 19 in the other direction (clockwise), the one-way clutch 9 rotates the transmission shaft 3.
Is allowed to rotate in the other direction (clockwise) with respect to the transmission gear 14, the connection of the transmission shaft 3 on the input shaft 2 side is cut off, and the operating torque of the manual operation lever 19 is reduced. Becomes possible. The one-way clutch 9
The same operation and effect can be obtained by disposing in the transmission gear 15 of the output shaft 4 and the transmission gear 12 of the transmission shaft 3 on the input shaft 2 side.

The brake clutch 10 is disposed on the speed change shaft 3 on the output shaft 4 side, idles the speed change shaft 3 with the power on the input shaft 2 side, and uses the reverse torque from the output shaft 4 side to change the speed change shaft. 3
The rotation (clockwise rotation) is locked (brake). With this configuration, the load on the output shaft 4 is large.
Or, when the torque gradually increases, the reverse rotation torque transmitted from the output shaft 4 to the manually operated shaft 6 and each of the speed change shafts 3 causes the speed change shaft 3 on the output shaft 4 side rotated by this torque to be applied to the brake clutch 10.
Can be locked (braking) and shut off, so that the manual operation lever 19 is not reversed. The braking clutch 10
The same effect can be obtained even if is disposed on the output shaft 4 or the transmission shaft 3 on the input shaft 2 side.

The reduction gear with a manually operated shaft according to the present invention is shown as a multi-stage type, but is not limited to this, and is not limited to this. The input shaft is connected to the output shaft via a pair of transmission gears and pinion gears. May be applied to a one-stage speed reducer that outputs power as a predetermined torque and rotation speed. In this case, the gear-pinion gear pair has a one-way clutch 9,
With the configuration in which the braking clutch 10 is arranged on the output shaft, it is possible to obtain the same effect as the above-described multi-stage speed reducer. Further, the manually operated shaft 6 is not limited to the one connected to the output shaft 4 by the bevel gear pair 7, and may be configured to manually drive the output shaft 4 by swinging the manually operated shaft 6. Further, although the configuration in which the shafts 2 to 4 are connected by the transmission gear and pinion gear pair 5 is shown, the invention is not limited to this. The transmission gears are provided on the shafts 2 to 4 and the three-stage transmission gear pair is used. It may be configured to be connected.

[0015]

According to the speed reducer with a manually operated shaft of the present invention, a one-way clutch is disposed between the output shaft and the manually operated shaft, and a brake clutch is provided on the speed change shaft. Even if there is power from the input shaft, the one-way clutch allows the output shaft to idle with respect to the manually operated shaft and shuts off the power transmission from the input shaft. It is. Also, the torque transmitted from the output shaft side can be prevented from rotating the manually operated shaft in reverse by braking the transmission shaft that is to be rotated with this torque by the brake clutch. As a result, it becomes possible to manually drive the output shaft manually by manually operating the manually operated rail during power outage and inspection work.

Also, since the one-way clutch is arranged on the output shaft side transmission shaft, the output shaft side transmission shaft is disconnected from the input shaft side by the one-way clutch by the operating force of the manual operation lever. As a result, the operating torque can be reduced.

Further, since the manually operated shaft is connected to the output shaft by a manual gear pair and the manual gear pair has a one-way clutch, the manually operated shaft can be connected to the output shaft via the manual gear pair. In addition, by having a one-way clutch in this gear pair, it is possible to prevent the power from the input shaft from being transmitted to the manually operated shaft.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a speed reducer with a manually operated shaft of the present invention.

FIG. 2 is a diagram showing a configuration of a conventional speed reducer with a manually operated shaft.

[Explanation of symbols]

 Reference Signs List 1 speed reducer with manually operated shaft 2 input shaft 3 speed change shaft 4 output shaft 5 gear / pinion gear pair (gear pair) 6 manual operation shaft 7 bevel gear pair (manual gear pair) 8, 9 one-way clutch 10 brake clutch 19 manual operation lever

Claims (3)

[Claims] 1. A transmission shaft or a plurality of transmission shafts arranged in parallel between an input shaft and an output shaft, provided on each of the shafts, and connecting these shafts to each other to transfer power from the input shaft to a predetermined torque. A speed reducer with a manually operated shaft, comprising: a multi-stage transmission gear pair that transmits a rotation speed to the output shaft; and a manually operated shaft that is connected to the output shaft and manually drives the output shaft. Between the manually operated shafts, the output shaft is idled in one direction with respect to the manually operated shaft by power from the input shaft side, and the output shaft and the manually operated shaft are connected by rotation of the output shaft in the other direction. A one-way clutch is disposed, and any one of the speed change shafts is provided with a brake that idles the speed change shaft with power from the input shaft side and brakes the rotation of the speed change shaft with torque transmission from the output shaft side. Reducer with manually operated shaft, characterized by disposing a clutch 2. A transmission shaft, which is provided in parallel with the output shaft, connects the transmission gear and the transmission shaft with power from the input shaft, and transmits the torque by transmitting torque from the output shaft. The speed reducer with a manually operated shaft according to claim 1, further comprising a one-way clutch for relatively rotating the gear and the transmission shaft. 3. The manual operation shaft is connected to the output shaft via a manual gear pair. The manual gear pair connects the output shaft to the manual gear pair with power from the input shaft side. 2. The reduction gear with a manually operated shaft according to claim 1, further comprising a one-way clutch that idles in one direction and connects the output shaft and a manual gear pair by rotation in the other direction of the output shaft. Machine.