Bidirectional mechanical converting unit

Abstract

The present invention discloses a bidirectional mechanical converting unit, comprising: a main shaft; a driving mechanism, which including a driving means and a reversing means which are coupled to each other; and a rotation means for inputting torque, an rotation axis of the rotation means being coaxial with the main shaft, the rotation means and the driving mechanism being coupled to each other, and the driving mechanism delivering the torque to output at the main shaft at a predetermined direction, no matter in which direction the rotation means rotates; wherein the predetermined direction can be switched via the reversing means. The present invention is simple structured, not only can efficiently utilizes the movements of the rotation means in either way, but also can switch the rotation direction of the output shaft conveniently upon demand, with easy operations.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]The present application is the U.S. national stage application of International Application PCT / CN2011 / 079246, filed Sep. 7, 2011. The International Application claims priority of Chinese Patent Application 201110189889.9, filed Jul. 7, 2011, the contents of which are incorporated herein by reference in their entireties.TECHNICAL FIELD OF THE INVENTION[0002]The present invention relates to a manual tool, and more particularly, to a mechanical converting unit which efficiently utilizes the bidirectional rotations of a driving means.BACKGROUND OF THE INVENTION[0003]During the using of common manual tools such as screwdrivers and torque wrenches, there is a movement limitation of the human hand in rotation direction, namely the inability of the human hand to turn continuously in one direction. The operation of such a tool whose rotation axis of the handle is coaxial with the tool's main shaft consists of a repetition of the following cycle: f...

AI Technical Summary

Benefits of technology

[0006]In view of the above, the technical object of the present invention is to provide a bidirectional mechanical converting unit which can switch the rotation direction of the main shaft conveniently.

[0016]In another preferred technical scheme of the bidirectional mechanical converting unit of the present invention, two pawl seats are disposed on the main shaft in positions corresponding to the two driving elements; a pair of opposite swinging pawls is disposed on each of the pawl seats symmetrically; the two driving elements are provided at least partially annularly with a toothed inner circumference which can engage with at least one of the pawls; the reversing means is sleeved on the main shaft, and positioning of the pawls can be controlled, to set rotation direction of the main shaft through changing the positioning of the pawls.

[0020]In yet another preferred technical scheme of the bidirectional mechanical convening unit of the present invention, two sets of slots are disposed at positions on a circumference of the main shaft corresponding to positions of the two driving elements, and each set of slots includes two slots; a detent urged outwards by an elastic element is disposed in each slot, the two driving elements are provided with a toothed inner circumference distributed annularly which can engage with at least one of the detents; the reversing means is sleeved on the main shaft, and positioning of the detents can be controlled, to set rotation direction of the main shaft through changing the positioning of the detents.

[0031]The bidirectional mechanical converting unit of the present invention combines the function of one-way clutches and the function of a reverser together on a reversing means, with a compact and simple structure. It not only can efficiently utilizes the movements of the rotation means in either way, but also can switch the rotation direction of the output shaft conveniently upon demand, with easy operations. The whole product is an integral design of which parts are not easy to get lost. When a push button is provided, the operator can push with only one finger and ease the direction-switching of the output shaft greatly.

Problems solved by technology

During the using of common manual tools such as screwdrivers and torque wrenches, there is a movement limitation of the human hand in rotation direction, namely the inability of the human hand to turn continuously in one direction.

However, in any case, the hand's reversed rotation could not bring any effective advance of the fastener, and therefore it becomes a wasted movement.

If the fastener to be loosed is the same type as the one being tightened in the beginning, the tool bit must be removed from end A before the handle re-mounting, and be inserted to end B. It is obvious that the direction-switching of the shat is very inconvenient.

It is even troublesome to replace the bit to the two ends of the shaft for multi-purpose screwdrivers with replaceable bits.

Furthermore, it means the integrity of the whole screwdriver itself can not be ensured and its parts are easy to get lost, to assure the handle can be removed from the shaft easily.