Ratchet wrench

Abstract

The invention discloses a ratchet wrench with large torque force and wide application range, comprising a handle, a ratchet mechanism and a cutter bar which are successively connected from top to bottom, wherein the ratchet mechanism comprises a handle pole, a reversing piece, a first tooth, a second tooth, a tooth papillae, a third tooth and a fourth tooth; the first tooth and the second tooth are installed on the handle pole in an elastic mode; the reversing piece is sleeved on the handle pole; the teeth on the tooth papillae are arranged at the outer edge of the tooth papillae; the tooth papillae and the handle pole are in superposed connection so as to realize opposite rotation; the third tooth and the fourth tooth are installed on the handle pole in an elastic mode; the first tooth, the second tooth, the third tooth and the forth tooth are distributed in turn along the circumferential direction of the tooth papillae; and the reversing piece is provided with a separating device which can lead the first tooth and the third tooth or the second tooth and the four tooth to be separated from the teeth on the tooth papillae.

Description

technical field [0001] The invention relates to a tool for fastening or dismounting, in particular to a ratchet wrench. Background technique [0002] The current ratchet wrench is equipped with a ratchet mechanism, the ratchet mechanism includes a handle column, a reversing member, a first tooth, a second tooth and a toothed ratchet, the first tooth and the second tooth are elastically mounted on the handle column, and the reversing member fits on the On the handle column, the toothed ratchet and the handle column are connected in a relatively rotatable fit, and the reversing member is provided with a top block for controlling the combination of the first tooth or the second tooth with the toothed ratchet. When turning the ratchet wrench, The first tooth or the second tooth combined with the ratchet can withstand the ratchet in one direction, but will not resist the ratchet in the opposite direction, and will only be pushed away by the ratchet and retracted into the stem. W...

AI Technical Summary

Problems solved by technology

It is obvious from the above structure that the function of the ratchet mechanism is that when one of the first tooth or the second tooth is combined with the ratchet, the stem can rotate idly in one direction without driving the ratchet, and rotate in the opposite direction to drive the ratchet. And to transmit torque, because only one tooth is combined with the toothed ratchet, in other words, when the handle column drives the toothed ratchet and transmits torque, only one tooth pushes the toothed ratchet to make the handle column and the toothed ratchet rotate together, so the torque that can be transmitted The torque is small, generally less than 18 N, and cannot be used to twist high-torque connectors, that is, the current ratchet wrench is applicable to a small torque and has a narrow range of use

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