New type electric impact drill

Abstract

The invention relates to a novel impact electric drill that includes handle, frame and drill chuck. Switch component is installed on handle. Motor, motor shaft, heat sink, driving gear, impact device and output shaft are installed in the frame. The drill chuck is installed on one end extending out of the frame. A first impact tooth is set on the inner side surface of driving gear. The corresponding section of impact device has the second impact tooth. A first circle wall is set outside the first impact tooth. And the outside of the second impact tooth has the second circle wall matching with the first circle wall. The first circle wall and the second circle wall form sealed structure to make the impact teeth gain good lubrication all the time.

Description

Technical field: [0001] The invention relates to an electric tool, in particular to a novel impact electric drill. Background technique: [0002] In the prior art, the technology of electric impact drills has matured day by day. It generally includes a handle, a body and a drill chuck. The handle is equipped with a switch assembly; the body is equipped with: a motor, a motor shaft, and a cooling device installed at the output end of the motor shaft. , the transmission gear meshed with the end of the motor shaft, the impact device located between the heat sink and the gear, the output shaft fixed on the transmission gear; the drill chuck is installed on the end of the output shaft protruding from the body; the inner surface of the transmission gear A first impact tooth is provided, and a corresponding part of the impact device is provided with a second impact tooth matched with it. When the impact electric drill is working, the first impact tooth and the second impact tooth ...

AI Technical Summary

Problems solved by technology

[0003] 1. Since there is no oil-proof gasket between the front shell of the body and the output shaft, the lubricating oil in the body is easily lost from the gap between the front end of the body and the output shaft during work, resulting in a serious waste of lubricating oil and The moving parts in the body cannot be well lubricated; at the same time, the waste particles and external dust generated by processing can easily enter the body through the gap, affecting the normal operation of the parts in the body

[0004] 2. The inductance is installed at the rear end of the motor in the body, and is respectively connected to the inlet end of the stator in the motor and the outlet end of the switch body or connected in series between the stator lead wire and the brush. In this way, it will not only impact the EMC of the electric drill ( Electromagnetic Compatibility) The anti-interference effect is very unstable, and the structure is not reasonable

[0005] 3. The impact block in the impact device only cooperates with the motor shaft through the bearing. Since the transmission gear is helical, a certain axial force will be generated during operation, so that the motor shaft vibrates frequently and is directly transmitted to the bearing, thus greatly shortening the bearing. At the same time, when the impact electric drill is working, it is easy for the lubricating oil in the gearbox to flow into the end of the heat sink through the bearing, thereby affecting the normal operation of the heat sink and its surrounding structures. Moreover, the impurities in the lubricating oil are also very It is easy to flow into the inside of the bearing, causing damage to the bearing, etc.

[0006] 4. When working, the high temperature generated by the high-speed rotation of the motor shaft and the axial movement and rotation of the output shaft will be transmitted to the impact block in the impact device, which will inevitably affect the positioning of the impact block by the casing and cause damage to the machine. At the same time, it will also affect the normal work of the parts around the impact block, which greatly shortens the service life of the machine

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