Forward, idle and reverse steering mechanism

Abstract

The invention relates to a forward, idle and reverse steering mechanism. The steering mechanism comprises one dual ratchet wheel sleeve, wherein a forward one-way ratchet gear ring and a reverse one-way ratchet gear ring distributed on the axial direction of the dual ratchet wheel sleeve; one pawl seat, wherein the first pawl and second pawl which can move up along the direction perpendicular to the axis of the dual ratchet wheel sleeve which are installed on the pawl seat; one eccentric driving mechanism for driving the action of the first and second pawl, the axis of the eccentric shaft in the eccentric driving mechanism is perpendicular to the axis of the dual ratchet wheel sleeve; one tool handle for putting the pawl seat in rotation, such tool handle is connected and fixed with the eccentric wheel or eccentric shaft in the eccentric driving mechanism so as to realize the linkage between a tool handle and an eccentric wheel. The mechanism has the advantages of not only meeting the requirements of multiple situations on working conditions, but also realizing the torque transmission and status switching through the handle directly.

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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