Security protection controller and electric hand drill using same

Abstract

The invention relates to a security protection controller and an electric hand drill using the same. The security protection controller comprises an operated displacement sensor with a rotatable angle, a synchronous tracking, positioning and time delay touch circuit, a power circuit, an enabled circuit and a reset switch, wherein the operated displacement sensor with a rotatable angle is connected with the synchronous tracking, positioning and time delay touch circuit and the power circuit and is respectively conducted by the enabled switch and the reset switch. Compared with the prior art, when the security protection controller provided by the invention is in the working state of the electric hand drill, the security protection controller automatically monitors the moving direction, speed and angle variation of the handle position in real time and synchronously tracks and positions the handle position; and when the moving speed and the angle variation of the handle of the electric hand drill are simultaneously more than the safe set values of the security protection controller, the security protection controller can quickly cut off the power supply, forces a motor to stop rotating, and eliminates potential safety hazards within a germination state to ensure the safety of operation personnel.

Description

technical field [0001] The invention relates to the field of safety protection control of electric tools, in particular to a safety protection controller for a hand electric drill and a hand electric drill using the safety protection controller. Background technique [0002] The electric hand drill is a commonly used small tool for drilling holes with electric power. The existing electric hand drill is mainly composed of a drill chuck, a drill shaft, a motor, an intermediate disc reducer, a casing, a handle, a handle switch and a steering gear. During the operation, the motor drives the drill bit to rotate at high speed to complete the drilling work. [0003] As a hand-held electric tool, the electric hand drill needs to exert pressure on the direction of the drill bit and provide corresponding balanced support force for the handle of the electric hand drill in actual operation. Therefore, it is not only labor-intensive, but also has high potential safety hazards. Especiall...

AI Technical Summary

Problems solved by technology

[0003] As a hand-held electric tool, the electric hand drill needs to exert pressure on the direction of the drill bit and provide corresponding balanced support force for the handle of the electric hand drill in actual operation, so it is not only labor-intensive, but also has high potential safety hazards

Especially in machinery, metal Large holes in the processing field During the drilling process, the operator often cannot take into account the effective control of the balance support force of the electric drill handle while applying pressure on the drill bit. When the friction resistance of the drill bit is greater than the balance support force provided by the operator's arm for the electric drill handle , the shell of the electric hand drill will be driven by the inertia of the electric hand drill motor to swing and rotate rapidly. If the momentary left rotation exceeds 90 degrees, or right rotation exceeds 120 degrees, it will cause damage to the operator's wrist. Injury, there is a high security risk

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