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Electric tool and its speed change mechanism

A technology of speed change mechanism and power tool, which is applied in the direction of manufacturing tools, mechanical equipment, transmission devices, etc., can solve the problem of shortening the life of the speed change mechanism and achieve the effect of prolonging the life.

Inactive Publication Date: 2008-08-20
POSITEC POWER TOOLS (SUZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the synthetic resin has a certain hardness and smoothness, although this solves the problem of shortening the service life of the speed change mechanism to a certain extent, it does not fundamentally solve the problem of tooth beating during the speed change process.

Method used

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  • Electric tool and its speed change mechanism
  • Electric tool and its speed change mechanism
  • Electric tool and its speed change mechanism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0054] Hereinafter, embodiments of the present invention will be described based on the drawings.

[0055] Such as figure 1 As shown in , the preferred embodiment of the present invention is applicable to a power tool 10, especially an electric tool such as a hand-held electric drill, electric hammer or screwdriver. Same as the prior art, the power tool 10 has a housing 101, inside which is provided with a motor 1 and a speed change mechanism, the speed change mechanism has a power output end 96 exposed to the housing 101, and a working head (such as a drill bit, a screwdriver bit, etc.) can be placed. ). The power output end 96 has a transmission mechanism output axis 99, which can convert the rotational force of the motor into the torque of the working head. In addition, a toggle button 21 is also provided on the top of the power tool housing 101, and the toggle button 21 can move along the output axis of the transmission mechanism. Through the toggle knob 21, the transmis...

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PUM

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Abstract

The invention relates to a power tool with a speed-change mechanism. The speed-change mechanism comprises a gearbox shell and a gear speed-change mechanism in the gearbox shell. The gear speed-change mechanism comprises a planetary gear and a planetary frame. The speed-change mechanism also comprises an internal gear ring and clutch components and the internal gear ring and the clutch components are sheathed at the exterior of the gear speed-change mechanism. A control part is arranged at the exterior of the gearbox shell and is used for controlling part of the clutch components to do radial movement, thus leading the internal gear ring and the gearbox shell or the planetary frame to generate engagement. Compared with the prior art, the power tool with the speed-change mechanism generates no gear-striking phenomenon in the speed-change process of the power tool, thus prolonging the service life of the speed-change mechanism.

Description

technical field [0001] The invention relates to a power tool, especially an electric tool with a speed change mechanism. Background technique [0002] In the electric driver in the prior art, the torque of the motor accommodated in the casing is transmitted and decelerated through the planetary gear reduction mechanism, and then transmitted to the power output end at the front end of the casing. The above-mentioned planetary gear reduction mechanism is composed of a plurality of planetary gears arranged axially and revolving inside the internal gear, and a planetary carrier for supporting the planetary gears. For example: U.S. Patent No. 3,718,054 in 1973 has disclosed a technology that uses planetary gears to change torque. [0003] In such an electric driver, it is known to provide a transmission mechanism for switching the rotational speed of the main shaft. Specifically, U.S. Patent No. 6,431,289 introduced that the two ring gears in the planetary gear reduction mechan...

Claims

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Application Information

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IPC IPC(8): F16H3/44B25F5/00
Inventor 陈成忠张士松
Owner POSITEC POWER TOOLS (SUZHOU) CO LTD