Bidirectional clutch

Abstract

The invention relates to a bidirectional clutch which comprises a first element, a second element, a plurality of clamping pieces and a switching unit. The bidirectional clutch is characterized in that the included angle between a normal line passing the circle center of each clamping piece and a first end edge, and a datum line passing the circle center of the clamping piece and a second end edge is larger than 160 degrees and smaller than 180 degrees; and the ratio of the depth at a deep part of a plurality of rolling spaces between the first element and the second element to the outer diameter of each clamping piece is greater than 1 and smaller than 1.1. Therefore, when the first element and the second element are linked, the clamping pieces can be prevented from skidding; the angle of movement is small; and the operation space restriction is less.

Description

technical field [0001] The invention relates to a clutch structure, in particular to a two-way clutch. Background technique [0002] Two-way clutches are widely used, and can be applied to objects that require one-way or two-way linkage, such as bicycle rear hubs, hand tools, etc. As far as hand tools are concerned, ratchet wrenches are the most widely used, such as China Taiwan Certificate No. Several patent cases such as M395549, M399781, and I340066 all install a ratchet with several ratchets and at least one pawl block inside a tool body, and utilize the bayonets provided by the pawl block to engage with the ratchets of the ratchet , and the reversing operation of the pawl block, the purpose of forward linkage, reverse idling and reversible linkage can be achieved. [0003] Although the above-mentioned ratchet wrench structure is quite commonly seen, it still has the following problems in fact: [0004] 1. The fewer ratchet teeth of the ratchet wheel, the larger the ac...

AI Technical Summary

Problems solved by technology

[0005] 2. If the number of ratchet teeth of the ratchet is increased, because the tooth depth is small and the bite force is insufficient, it is easy to cause tooth collapse when the torque is overloaded, and the operator is easy to be injured and cause damage to the object

[0006] 3. During the reverse idling, the pawl block will jump off the ratchet teeth of the ratchet wheel, and it will make a rattling noise

[0007] In addition, there is also another toothless ratchet wrench (for example, patent cases such as Taiwan Certificate No. M246111, M243302), which produces several sliding spaces with deep ends and shallow ends between a tool body and a driving rod. In addition, a roller is provided in the sliding space. If the included angle between each roller and an inner ring surface of the tool body and a clamped surface of the driving rod is small, the operation will be easier. If the ratio of the maximum depth between the inner ring surface of the tool body and the clamped surface of the drive rod to the outer diameter of each roller is larger, the actuation angle will be larger, and the operating speed will be slower. The limitation of space is also relatively large, and the above-mentioned patent cases respectively have the above-mentioned problems, which really need to be improved

Images