JPS5833942B2 - One-way clutch device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a one-way clutch device used in automatic coupling joints between prime movers and the like.

Conventional clutches of this type use simple one-way clutches that can transmit torque in only one direction via sprags, etc.; There is a problem with the transmission of torque.

The present invention aims to solve such problems by installing a conventional one-way clutch between the input shaft and the output shaft,
By installing a dog clutch with a large torque transmission capacity, it is possible to reliably transmit even large torques accompanied by shocks, and when the output shaft reaches a higher rotational speed than the input shaft, the dog clutch is automatically activated. It is an object of the present invention to provide a device which allows the one-way clutch to be disengaged and freely rotated at the one-way clutch portion.

For this reason, the one-way clutch device of the present invention includes a sliding wheel between an input shaft and an output shaft that can slide in the axial direction relative to the output shaft while rotating integrally with the output shaft. The sliding wheel is provided with a one-way clutch between the input shaft and an intermediate shaft that engages through a helical gear joint, in order to transmit torque from the input shaft to the output shaft. A dog clutch is provided between the driving wheels,
The helical gear joint returns the sliding wheel when torque is transmitted from the input shaft to the output shaft via the one-way clutch, intermediate shaft, helical gear joint, and sliding wheel. The clutch is characterized in that it has a helical part formed in a direction that presses the dog clutch in the closing direction against the force.

Hereinafter, embodiments of the present invention will be explained with reference to the drawings.
FIG. 1 is a conceptual diagram thereof, and FIG. 2 is a partial vertical sectional view showing an example of its structure. Between the input shaft 1 and the output shaft 2,
A sliding wheel 9 is engaged with the output shaft 2 via a straight tooth coupling 6 so as to be able to slide relative to the output shaft 2 in the axial direction while rotating integrally therewith.

Further, an intermediate shaft 4 is engaged with this sliding ring 9 via a helical gear joint 5 (see Fig. 1a).
is engaged with the input shaft 1 via a cam-type or sprag-type one-way clutch 3, an intermediate ring 3a, a torsion spring joint 10, and a spring-equipped friction clutch 11, thereby transmitting torque from the input shaft 1 to the output shaft 2. It is now possible to do this.

Further, a sliding ring 9 is engaged with the input shaft 1 via a dog clutch 8 having teeth with a sawtooth cross section in the radial direction and a torsion spring joint 7 with a stopper (see Fig. 1b), thereby generating a large torque. Even in this case, torque is reliably transmitted from the input shaft 1 to the output shaft 2 via the dog clutch 8 and the sliding wheel 9.

That is, the helical gear joint 5 connects the input shaft 1 to the one-way clutch 3, the intermediate shaft 4, the helical gear joint 5, and the sliding wheel 9.
When torque is transmitted to the output shaft 2 via the sliding wheel 9 against its return mechanism 12, the dog clutch 8
It has a slot formed in the direction of pressing in the closing direction.

In FIG. 1, the return mechanism 12 is a spring type return mechanism 12.
Although shown, this may be constructed as a hydraulic return mechanism 12 as shown in FIG.

Further, the torsion spring joint 10 is configured to have a stronger torsion spring than the torsion spring joint 7 with a stopper.

Since the one-way clutch device of the present invention is constructed as described above, when the input shaft 1 starts rotating, the one-way clutch 3 causes the intermediate shaft 4 to immediately rotate.

When a load torque is applied to the output shaft 2, the helical gear joint 5 causes the sliding ring 9 to move toward the input shaft 1 along the tooth trace of the straight tooth coupling 6 in response to the rotation of the intermediate shaft 4.

As a result, the dog clutch 8 is engaged, but at this time, due to the torsional escape of the torsion spring joint 7,
The teeth of the dog clutch 8 are pushed in completely.

As the input shaft 1 rotates, the torsion spring joint 7 twists,
Finally, due to the stopper, the input torque is transferred to the sliding wheel 9.
, is transmitted to the output shaft 2 via the straight tooth coupling 6.

At this stage, the input torque is transmitted to the output shaft 2, but the torsional phase difference between the input shaft 1 and the sliding wheel 9 that occurs depending on the engagement timing of the dog clutch 8 is absorbed by the torsion spring joint 10.

Furthermore, even if an abnormal failure occurs during operation, safety can be ensured by the friction clutch 11 using a spring.

Next, when the number of revolutions on the output side exceeds the number of revolutions on the input side, the load torque disappears, the friction force on the engagement surface of the dog clutch 8 disappears, and the sliding wheel 9
is returned, the engaged portion of the dog clutch 8 is disengaged, and the one-way clutch 3 rotates freely.

As described above, according to the one-way clutch device of the present invention, at the initial stage of torque transmission from the input shaft 1 to the output shaft 2, the one-way clutch 3 works first, and then the action of the helical gear joint 5 acts. Since the dog clutch 8 is engaged, a sufficiently large torque transmission capacity can be obtained, and when the rotational speed of the output shaft is about to become higher than the rotational speed of the input shaft, the helical gear coupling 5 is reversely engaged. In conjunction with the action of the return mechanism 12, the engagement of the dog clutch 8 is released,
Idle rotation is performed by the one-way clutch 3,
Compared to conventional one-way clutches, this clutch has the advantage of being suitable for transmitting large torques accompanied by shocks.

[Brief explanation of drawings]

The figures show an embodiment of the one-way clutch device of the present invention; FIG. 1 is its conceptual diagram, FIGS. 1a and 1b are explanatory diagrams of a part thereof, and FIG. 2 is its structure. FIG. 3 is a partial longitudinal sectional view showing an example. 1...Input shaft, 2...Output shaft, 3...
... One-way clutch, 3a ... Intermediate ring, 4 ... Intermediate shaft, 5 ... Helical gear joint, 6 ... Straight tooth Coupling, 7...
Torsion spring joint with stopper, 8... Dog clutch, 9... Sliding wheel, 10... Torsion spring joint, 11... Friction Clara 6 with spring 12 ...Return mechanism.

Claims (1)

[Claims] 1. A sliding ring is provided between the human power shaft and the output shaft, which can slide in the axial direction relative to the output shaft while rotating integrally with the output shaft, and this sliding ring is connected to the helical gear joint. A one-way clutch is provided between the intermediate shaft that engages with the input shaft and the input shaft to transmit torque from the input shaft to the output shaft, and a dog clutch is provided between the input shaft and the sliding wheel. and the helical gear joint connects the sliding wheel when torque is transmitted from the input shaft to the output shaft via the one-way clutch, intermediate shaft, helical gear joint, and sliding wheel. A one-way clutch device characterized by having a helical part formed in a direction to press the dog clutch in the closing direction against the return mechanism.