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Electric drill

A technology for electric drills and power supplies, which is applied in portable drilling rigs, drilling/drilling equipment, non-electric variable control, etc. It can solve the problems that the maximum output torque of electric drills cannot be accurately controlled, the maximum output torque deviation, and the elastic force are not completely the same, etc., to achieve The effect of simple structure, small size and high precision

Inactive Publication Date: 2013-05-29
NINGBO HAILIAN ELECTRIC APPLIANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] This kind of electric drill needs to be equipped with a torque sleeve, which has a large volume, which makes the electric drill larger and inconvenient to use, and because the torque sleeve adjusts the output torque through a compression spring, and the elastic force of each compression spring is not exactly the same, When different electric drills are in the same working gear, their tripping force will have deviations, resulting in deviations in their maximum output torque, making the maximum output torque of electric drills unable to be accurately controlled

Method used

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Embodiment Construction

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] Depend on figure 1 , figure 2 As shown, the electric drill of the present invention includes a motor 1, a battery pack 2, a speed control switch 3, a main control circuit board 4 and a torque regulating device 5, the output shaft of the motor 1 drives the drill chuck 6 to rotate through a gearbox, and the battery pack 2 is used for The motor 1 supplies power, the battery pack 2 includes a lithium battery pack and a protection circuit, the main control circuit board 4 is provided with a main control CPU, the input end of the main control CPU is electrically connected with the output end of the battery pack 2, and the output end of the main control CPU is connected with the output end of the battery pack 2. The input end of the speed regulating switch 3 is electrically connected, the output end of the speed regulating switch 3 ...

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PUM

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Abstract

The invention discloses an electric drill. The electric drill comprises a power source, a speed regulation switch (3) and a motor (1) and further comprises a main control circuit board (4) and a torsion regulating device (5) which can send a control signal to control output current of the main control circuit board (4), wherein the power source, the main control circuit board (4), the speed regulation switch (3) and the motor (1) are electrically connected in sequence. The electric drill can accurately control the maximum output torque of a drill chuck and is small in size.

Description

technical field [0001] The invention relates to an electric drill. Background technique [0002] The output torque of the existing electric drill is adjusted by turning the torque sleeve. The torque sleeve is threadedly connected with the internal gear with the jump gear surface through the adjustment nut, and a compression spring and a gear jump pad are sequentially arranged between the adjustment nut and the gear jump surface of the internal gear. The specific adjustment process is as follows: when the torque sleeve is turned, the torque sleeve and the adjustment nut will compress the compression spring, and the elastic force of the compression spring acts on the steel ball to change the degree of compression between the steel ball and the jumper surface, thereby changing The tripping force of the electric drill is used to adjust the maximum output torque of the electric drill. [0003] This kind of electric drill needs to be equipped with a torque sleeve, which has a lar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B45/02G05D17/02
Inventor 张天石黄永林
Owner NINGBO HAILIAN ELECTRIC APPLIANCE
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