Forward idling and reverse steering mechanism

Abstract

The invention relates to a forward idling and reverse steering mechanism. The forward idling and reverse steering mechanism comprises a pair of ratchet wheel sleeves, a pawl seat, an eccentric driving mechanism and a tool handle, wherein forward one-way ratchet wheel ring gears and reverse one-way ratchet wheel ring gears are distributed along the axial direction of the pair of ratchet wheel sleeves; a first pawl and a second pawl which can move along the direction perpendicular to the axes of the double ratchet wheel sleeves are mounted on the pawl seat; the eccentric driving mechanism is used for driving the first and second pawls to act; the axis of an eccentric wheel axle in the eccentric driving mechanism is perpendicular to the axes of the double ratchet wheel sleeves; and the tool handle is used for driving the pawl seat to rotate, and connected and fixed with an eccentric wheel or the eccentric wheel axle in the eccentric driving mechanism, so that the linkage between the tool handle and the eccentric wheel can be achieved. The forward idling and reverse steering mechanism provided by the invention has the advantages that not only can the various-state working condition requirements be met, but also the torque transfer and the state switching can be directly achieved through the tool handle.

Description

technical field [0001] The invention relates to a ratchet mechanism, in particular to a forward-air-reverse steering mechanism. Background technique [0002] As a ratchet wrench as a fastening tool, a rotating body is connected to the end of the handle, and a ratchet is arranged on the circumferential side of the rotating body, and one of the positive and negative locking claws is selectively matched with the ratchet to make the rotation The body directly or indirectly drives the fastener to rotate in the forward direction or the reverse direction; the forward and reverse rotation direction is switched by using the conversion assembly connected with the locking claw (for example, patent documents 1 and 2). [0003] Patent Document 1: Patent Application Publication No. CN 102019595 A; [0004] Patent Document 2: JP Unexamined Publication No. 2004-345011; [0005] In the prior art, there are some defects as follows: [0006] (1) When the handle drives the rotating body to r...

AI Technical Summary

Problems solved by technology

[0006] (1) When the handle drives the rotating body to rotate, there are mainly two states. One, the handle transmits torque to the rotating body when it rotates forward, and the rotating body slips relative to the handle when rotating in the reverse direction; second, the handle rotates in the reverse direction. Torque is transmitted to the rotating body during rotation, and the rotating body slips relative to the handle during forward rotation, resulting in idling of the handle; in these two states, the torque transmission between the handle and the rotating body in the forward and reverse directions cannot be cut off at the same time, and in a certain In some working conditions, the third state is required, so there are certain limitations when it is applicable to a variety of working conditions;

[0007] Of course, when the conversion assembly controls the positive and negative locking claws to move to a specific position, there may be a situation where the positive and negative locking claws break away from the ratchet at the same time, but it is not the original purpose of its switching operation, and the specific position also Unable to perform accurate positioning and not in normal working condition;

[0008] (2) A conversion component is required to control one of the positive and negative locking claws to cooperate with the ratchet to realize the switching of the forward and reverse rotation directions, which is inconvenient when switching

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