Patent Application
20230415312
The present invention relates to a torsion tool.
Generally, socket tools are often used for disassembling and assembling workpieces such as screws, nuts, etc. However, the conventional socket tool cannot apply constant torque to a workpiece during operation, and thus it is difficult for users to control the torque applied to the workpiece, thus causing inconvenience in disassembly and assembly, and thus damaging the workpiece easily.
Therefore, torsion tools are provided, accordingly. A main body of the conventional torsion tool is provided with a driving head, and the main body of the torsion tool includes a torque-adjusting mechanism for controlling applying torque within a set range so as to avoid damage to the workpiece. However, the torque-adjusting mechanism of the conventional torsion tools can only provide a limited range of torque control, which narrows the applications for assembling/disassembling. Furthermore, the torque-adjusting mechanism of the conventional torsion tool is easy to be damaged or broken.
The present invention is, therefore, arisen to obviate or at least mitigate the above-mentioned disadvantages.
The main object of the present invention is to provide a torsion tool which can avoid damage to driven piece or workpiece.
To achieve the above and other objects, a torsion tool is provided, including: a barrel; a first member disposed at one end of the barrel, including at least one first engaging portion; a second member, disposed in the barrel, including at least one second engaging portion, on a motion path of the second member, the at least one second engaging portion and the at least one first engaging portion being releasably engaged with each other; an elastic mechanism, including a first fixation portion disposed in the barrel and a plurality of elastic arms, the plurality of elastic arms being independently fixed to the first fixation portion and corresponding to each other, the second member being located between and configured to radially expand the plurality of elastic arms; wherein when there is a torsion force greater than a preset torque value between the at least one second engaging portion and the at least one first engaging portion, the second member urges and radially expands the plurality of elastic arms so that the at least one second engaging portion and the at least one first engaging portion are relatively slipable and disengageable.
The present invention will become more obvious from the following description when taken in connection with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment(s) in accordance with the present invention.
Please refer to
The first member 20 is disposed at one end of the barrel 10, and the first member 20 includes at least one first engaging portion 21. The second member 30 is disposed in the barrel 10, and the second member 30 includes at least one second engaging portion 31. On a motion path of the second member 30, the at least one second engaging portion 31 and the at least one first engaging portion 21 are releasably engaged with each other. The elastic mechanism 40 includes a first fixation portion 41 disposed in the barrel 10 and a plurality of elastic arms 42, the plurality of elastic arms 42 are independently fixed to the first fixation portion 41 and correspond to each other, and the second member 30 is located between and configured to radially expand the plurality of elastic arms 42. When there is a torsion force greater than a preset torque value between the at least one second engaging portion 31 and the at least one first engaging portion 21, the second member urges and radially expands the plurality of elastic arms 42 so that the at least one second engaging portion 31 and the at least one first engaging portion 21 are relatively slipable and disengageable (
In this embodiment, the first member 20 is detachably assembled to the barrel 10, which is easy to exchange or cooperate with a tool of suitable size, type or/and function. Preferably, an end of the first member 20 is tetragonal or non-circular, for connection of a tool such as a socket tool; another end of the torsion tool 1 is configured to be connected to a rotational shaft of a driving tool (such as hand tool or power tool).
The second member 30 includes an engaging member 32 including the at least one second engaging portion 31 and an abutting member 33 abutted between the engaging member 32 and the plurality of elastic arms 42, and the abutting member 33 is located between and configured to radially expand the plurality of elastic arms 42. Preferably, the abutting member 33 includes an arcuate surface 331 extending between the plurality of elastic arms 42. For example, the arcuate surface 331 is an arced surface, which lowers the friction, improves operation and urges the plurality of elastic arms 42 evenly. The abutting member 33 is detachably abutted against the engaging member 32 (by contact, screwing, buckling, snapping or the like, for example). In an alternative embodiment as shown in
In this embodiment, the first fixation portion 41 includes a first fixation member 411 connected to the barrel 10, a base 412 located at a side of the first fixation member 411 and a pressing member 413 fixedly connected to the base 412. Each of the plurality of elastic arms 42 includes a lateral section 421 received in the base 412 and clamped between the pressing member 413 and the base 412, so that it is easy to manufacture and assemble/disassemble and has a stable and strong structure. Each of the plurality of elastic arms 42 further includes an upright section 422 extending toward the second member 30 and abutting the second member 30, and the lateral section 421 extends laterally from the upright section 422 to be in T-shaped, L-shaped, cross-shaped or the like. Preferably, the lateral section 421 extends laterally in opposite directions from the upright section 422, which enhances the combination of the plurality of elastic arms 42 and the base 412 so that the plurality of elastic arms 42 are not easy to be broken.
Specifically, the base 412 includes a plurality of grooves 414 arranged in parallel, and the lateral section of each of the plurality of elastic arms 421 is received in one of the plurality of grooves 414 and flush with the base 412 so that the plurality of elastic arms 42 can be expanded evenly and the preset torque value which is more precise can be obtained. At least one or a plurality of fasteners 50 fix the pressing member 413 to the base 412, which is stable and easy to assemble/disassemble. The pressing member 413 includes a penetrating hole 415, and the plurality of elastic arms 42 and the threaded member are disposed through the penetrating hole 415.
The elastic mechanism 40 further includes a threaded member 43 and a plate member 44, and the threaded member 43 is disposed through the first fixation member 411, the base 412 and the pressing member 413. The plurality of elastic arms 42 extend toward the second member 30 and extend through and project beyond the plate member 44. The threaded member 43 is screwed to the plate member 44, thus allowing adjustment to have various protrusion level of the plurality of elastic arms 42 beyond the plate member 44. The plate member 44 includes a plurality of through holes 441 through which the plurality of elastic arms 42 are disposed, and each of the plurality of through holes 441 includes an inclined surface 442 located between one of the plurality of elastic arms 42 and the barrel 10 and the barrel and expands upward, which provides a space allowing movement of the elastic arm 42 urged radially. Preferably, the elastic mechanism 40 further includes a nut 60 screwed to the threaded member 43, and the nut 60 is located between the plate member 44 and the base 412, so that the threaded member 43 is kept to be with the first fixation portion 41 as detached from the plate member 44. The nut 60 is thinner than the pressing member 413 and is located in the penetrating hole 415, and thus it does not affect the travel distance of the plate member 44 on the threaded member 43. Each of the plurality of elastic arms 42 includes a corner portion 423 abutted against the second member 30 so that the plurality of elastic arms 42 can be expanded evenly and smoothly.
Please refer to a second preferable embodiment of the present invention shown in
Although particular embodiments of the invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the invention. Accordingly, the invention is not to be limited except as by the appended claims.
