Self-adjusting torque device

Abstract

There is provided a self-adjusting torque device which includes a driving module, a driven module and an adjusting module. The driving module is connected to a power inputting apparatus and has an acting force which is a first tension generated by the power inputting apparatus. The driven module is connected to a winding material and has an acting force which is a second tension applied on the winding material. The adjusting module is connected to the driving module and the driven module, and adjusts a distance between the driving module and the driven module according to the second tension force so as to keep the second tension identical with the first tension.

Description

BACKGROUND OF THE INVENTION[0001]The present invention relates to a self-adjusting torque device.[0002]During production process, some raw / auxiliary materials are fed and recovered in a winding form. In the course of feeding and recovering of a winding material, a torque of a driving motor M (M=R×F) is maintained constant. Since a radius R of the winding material varies with the feeding of the material, a tension F of the material is changed accordingly, which affects the accuracy of the feeding of material.[0003]FIG. 1 is a diagram illustrating a tension variation during the course of feeding and recovering of a winding material in the related art. At an initial stage, the radius R1 of the winding material is the largest, while the tension F1 is the smallest; after an operation of a period of time, the radius R2 of the winding material is decreased, and the tension F2 is increased where the torque M is kept unvaried.[0004]A known approach for solving the above problem is to provide...

AI Technical Summary

Benefits of technology

[0006]According to an embodiment of the present invention, a self-adjusting torque device is provided, which includes a driving module connected to a power inputting apparatus and having an acting force which is a first tension generated by the power inputting apparatus; a driven module connected to a winding material and having an acting force which is a second tension applied on the winding material; an adjusting module connected to the driving module and the driven module and adjusting a distance between the driving module and the driven module according to the second tension so as to keep the second tension identical with the first tension.

Problems solved by technology

In the above approach, the variation of the torque suffers from abrupt changes; that is to say, the differences between the torques M1 and M2 and between M2 and M3 are very great, and thus a smooth and gradual change is not available.

In addition, when the radius of the winding material is in a range between R1 and R2 or between R2 and R3, the tension F will continue to vary with the change of the radius and still results in inaccuracy of feeding and recovering of the winding material.

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