JPH0678779B2 - Rolling friction torque transmission device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Field of Industrial Application The present invention is mainly for winding a wire from a pay-out bobbin and winding the wire with a take-up bobbin, always with respect to a pay-out bobbin shaft to which the pay-out bobbin is attached. Apply the required rotation torque,
As a result, at the time of changing the braking state acting on the feeding bobbin shaft from the braking state to the non-braking state, a rolling friction that rapidly increases the feeding speed by the large starting torque due to the rotation torque and can follow the wire feeding speed. Type torque transmission device.

(2) Conventional Technology Conventionally, as a means for transmitting the rotational torque of the main driving shaft to the driven shaft, an oil system using oil interposed between the main driving unit and the driven unit, a powder system using powder, and a felt system using felt. Etc. In the oil method, it is structurally difficult to maintain a complete oil seal and oil leakage easily occurs, and it is technically difficult to maintain a normal operation for a long period of time due to oil deterioration due to generated heat. In addition, the powder method is a performance that is accompanied by deterioration of durability caused by rapid progress of wear due to powder of equipment, a problem of treatment of frictional heat generated by friction between powders, and deterioration of friction ability due to smoothing of powder which progresses according to use. There is a problem of high operating cost due to deterioration and use of expensive powder. Further, the felt method has drawbacks such as large fluctuations in torque and poor durability.

(3) Problems to be Solved by the Invention The present invention solves the above-mentioned conventional drawbacks all at once, has light driving, stable torque transmission performance, and high durability, and has a simple and robust structure and maintenance. An object of the present invention is to obtain a rolling friction type torque transmission device which is easy to manage.

(4) Means for Solving the Problems The present invention has been made from the viewpoint of solving the above problems, and includes a rotating shaft, a fixed bearing fixed to the rotating shaft, and a rotating shaft. On the other hand, one or more movable bearings which are engaged only in the rotational direction and movable in the axial direction, spacers interposed between the bearing frames of one of the inner ring frame and the outer ring frame of each bearing, and the movable bearings. Rolling friction type composed of a pressing force urging means for pressing the other bearing frame of the inner ring frame or the outer ring frame with an appropriate pressing force in the fixed bearing direction, and a rotating body fixed to the outside of the bearing. It is intended to obtain a torque transmission device.

(5) Operation Next, the operation of the present invention will be described.

By appropriately operating the pressing force urging means, one of the inner ring frame and the outer ring frame of the movable bearing is set to be pressed with an appropriate pressing force in the fixed bearing direction,
A rotating body fixed to the outside of the bearing is interlocked with a belt connected to a rotary driving device such as a motor through a relay device such as a transmission. In use, the rotary drive device is started to integrally rotate the rotary body.
A fixed bearing fixed to the rotary shaft and one or more movable bearings adjacent to the fixed bearing that are engaged only in the rotational direction and movable in the rotary shaft direction are provided. Since a spacer is interposed between one of the bearing frames of the outer ring frame and thereby a gap is formed between the other bearing frames, the other bearing frame of the movable bearing is appropriately pressed against the fixed bearing direction. Since only the bearing frame is allowed to move in the fixed bearing direction by pressing with, the inner couple of the movable bearing is sandwiched by the inversion body and a required couple acts on the inner bearing frame, resulting in the inner and outer ring frames. Rotational friction occurs between the inner rotating body and the inner rotating body that holds it.

Therefore, the rotating torque of the rotating body fixed to the outside of the bearing and driven as described above is transmitted to the rotating shaft through the movable bearing engaged in the rotating direction of the rotating shaft. The transmission coefficient of the rotational torque is adjusted and set by the pressing force of the pressing force urging means.

(6) Examples Hereinafter, description will be given with reference to the drawings.

1 and 2 show an embodiment of the present invention, in which a rotary shaft 10 is provided, and a fixed bearing bearing 12 fixed to the rotary shaft 10 and a predetermined gap from the fixed bearing bearing 12 are provided on the rotary shaft 10. A movable bearing bearing 14 is provided which is engaged in the rotational direction by key fitting and is movable in the rotational axis direction. An inner ring frame 18 of a fixed bearing 16 is fitted in the fixed bearing bearing 12, and an inner ring frame 24 of a movable bearing 22 is fitted in the movable bearing bearing 14. A spacer 28 is interposed between the outer ring frame 20 of the fixed bearing 16 and the outer ring frame 26 of the movable bearing 22.

The screw rod 34 is penetrated between the screw hole 30 formed in the fixed bearing bearing 12 and the through hole 32 opened in the movable bearing bearing 14, and the screw head 36 of the screw rod 34 and the step hole of the through hole 32. A spring 40 is interposed between the wall surface 38 and the wall surface 38. When the screw rod 34 is rotated, the screw rod 34 moves forward and backward with respect to the fixed bearing bearing 12, so that the spring 40 moves the step hole wall surface 38, that is, the movable bearing bearing 14 toward the fixed bearing bearing 12. The pressing force is adjusted and pressed, and the fixing screw 42 is tightened and fixed at that position. Thereby, the inner ring frame 24 of the movable bearing 22 is pressed toward the inner ring frame 18 of the fixed bearing 16. Inner ring frame 24 of the movable bearing 22
Is allowed to move in the direction of the inner ring frame 18 of the fixed bearing 16, and as a result, the movable bearing is
A desired couple acts on the inner and outer ring frames 24 and 26 on the inner frame 22, and a thrust force acts between the inner and outer ring frames and the inner rotating body 44 that sandwiches the inner and outer ring frames to generate rotational friction.

A rotating body 46 is fitted on the outer sides of the bearings 16 and 22, and is held by a cover plate 48 and fixed by a fixing screw 50.

A belt groove 52 is provided at a predetermined position on the circumferential surface of the rotating body 46, and a belt interposed between the belt groove 52 and the rotation driving device is stretched.

The rotating body 46 is rotated by a rotation drive device via a belt, and the rotating torque of the rotating body 46 is transmitted to the rotating shaft 10 via a movable bearing 22 engaged in the rotating direction of the rotating shaft.

3 and 4 show another embodiment of the present invention.
The spacer 28 is interposed between the inner ring frame 20 of the fixed bearing 16 and the inner ring frame 26 of the movable bearing 22, and the pressing force urging means is provided on the inner ring frame 26 side of the movable bearing 22.

In the drawings, the portions denoted by the same reference numerals indicate the same constituent parts corresponding to each other.

(7) Effects of the Invention As is clear from the above description, the present invention has very little noise during driving and is light, stable torque transmission performance, high durability performance, robust structure, and simple transmission. Combined with the torque change adjustment function and the ease of maintenance, the mechanical reliability is remarkably high.

[Brief description of drawings]

FIG. 1 is a sectional view showing the structure of an embodiment of the present invention, FIG. 2 is a side view of the same, FIG. 3 is a sectional view showing the structure of another embodiment of the present invention, and FIG. Is.

Claims (1)

[Claims] 1. A rotating shaft, a fixed bearing fixed to the rotating shaft, and one or more movable bearings adjacent to the rotating shaft, which are engaged only in the rotating direction and are movable in the rotating shaft direction. A spacer interposed between one bearing frame of the inner ring frame or the outer ring frame of each bearing and the other bearing frame of the inner ring frame or the outer ring frame of the movable bearing are pressed with a proper pressing force in the fixed bearing direction. A rolling friction type torque transmitting device comprising a pressing force urging means and a rotating body fixed to the outside of the bearing.