Electric spanners

Abstract

The invention relates to an electric wrench, which includes a pinion gear driven by a motor, a large gear meshed with the pinion gear, a ratchet seat, a pawl and a ratchet wheel, and the pawl and ratchet wheel are fixed on the ratchet wheel seat, and is characterized in that: The large gear is connected to the clutch, and the clutch drives the ratchet seat to rotate through the clutch spring; two left and right pawl pressure plates are arranged on the ratchet seat and both sides of the ratchet wheel, and one end of the pawl pressure plate is fixed on both sides of the ratchet wheel. One end rests on the inclined side of the ratchet. The present invention adopts the ratchet pressing plate to replace the separation and closing of the cylindrical pin and the ratchet in the background technology so that the ratchet interval generates impact torque, improves the impact torque of the electric wrench, and improves the operation stability and reliability of the electric wrench; the large gear and The use of the clutch and the clutch spring between the ratchet seat, when the torque the ratchet bears is greater than the rated torque, the clutch spring clamped between the clutch and the large gear will generate greater compression to limit the relative movement of the clutch, thereby The output torque of the ratchet is limited within the rated torque, which provides overload protection for the electric wrench.

Description

technical field [0001] The invention relates to an electric wrench driven by a motor, in particular to an electric wrench with a ratchet impact structure. Background technique [0002] The electric wrench commonly used at present, its structural diagram is as follows: image 3 with Figure 4 As shown, it generally includes a motor 1', a pinion 2' connected to the motor shaft, a large gear 3' meshing with the pinion 2', a ratchet 9' and a pawl 8' fixed on the ratchet seat 7', fixed on the There are two cylindrical pins 6' on the ratchet seat 7' and between the ratchet wheel 9' and the ratchet 8', and a flywheel disc 4' is arranged between the ratchet seat 7' and the large gear 3'. When the motor 1' works, the ratchet seat 7' is driven to rotate through the rotation of the pinion 2' and the large gear 3', and the two garden pins 6' on the ratchet seat 7' contact the pawl under the centrifugal force of the flywheel disc 4' 8' is disengaged, and the high-speed rotating pawl 8'...

AI Technical Summary

Problems solved by technology

But the electric wrench of this kind of structure still has the unsatisfactory place, this electric wrench drives ratchet 8 ' through two cylindrical pins 6 ' that are fixed on the ratchet seat 7 ' and thereby drives ratchet seat 7 ' to complete its high-speed rotation, exists The disadvantages of low impact torque and poor reliability, and the impact torque cannot be adjusted, and there is no overload protection function

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