Electric chain saw

Abstract

The present invention relates to an electric chain saw which comprises a casing and a motor. The front end of the casing is provided with a braking baffle, the back end is provided with a handle, and the inside is provided with a gear box which is connected with the motor by transmission. The gear box comprises an output shaft and a rack wheel which is arranged at the output shaft. A torsional spring is arranged between the rack wheel and the output shaft. One end of the torsional spring is fixedly connected and matched with the output shaft, and the other end is a free end which is matched with the rack wheel in a movable way. The inside of the casing is also provided with a braking stop device which comprises a switch button arranged at the handle, a handspike which resists against the switch button and can slide along with the switch button, a thrust block which is connected with the braking baffle fixedly and can slide forwards and backwards as well as a linkage block which is arranged between the handspike and the thrust block and respectively forms linkage with the handspike and the thrust block. The linkage block is equipped with a brake lever which can slide up and down. When the brake lever is at the lower position, the lower end of the brake lever is matched with the free end of the torsional spring. The electric chain saw with the braking stop device is not only safe for use and simple and convenient for operation, but also has simple structure.

Description

Technical field: [0001] The invention relates to a hand-held chain saw, in particular to an electric chain saw. Background technique: [0002] The electric chain saws in the prior art all include an organic shell, a motor, and a saw chain driven by the motor and supported by a guide plate. The saw chain can be rotated at a high speed under the drive of a motor to realize the cutting of trees. During the cutting process, the head of the saw chain will inevitably encounter hard objects (such as branches, tree knots, artificial metal objects, etc.) At this time, the saw chain will recoil towards the operator upwards or backwards, which seriously threatens the operator’s life. [0003] Therefore, in order to eliminate the above-mentioned dangers, a variety of brake stop devices have been invented. For example, a brake stop device for an electric chain saw disclosed in Chinese Patent 200520073119.8 includes a brake transmission structure and a clutch. The clutch structure is mainly co...

AI Technical Summary

Problems solved by technology

[0004] First, in this structure, the clutch is mainly composed of a brake drum and a brake band. Its structure is relatively complicated. In addition, the brake drum and brake band are easy to wear and tear, and it is easy to cause slippage when the clutch is tight, resulting in failure to brake urgently and causing serious damage to the operator. Dangerous, unsafe to use

[0005] Second, when encountering the recoil phenomenon, the operator will habitually grasp the handle with one hand, resist with the other hand, and push the brake baffle forward, but in this structure, it is necessary to release the switch Push the brake baffle forward again to realize emergency braking, which

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