Power tool

A power tool and electric power technology, which is applied to power tools, manufacturing tools, portable mobile devices, etc., can solve the problems such as the laborious operation of sweeping, skipping and gear switching, the separation of the metal bow and the moving ring gear, etc., to reduce manufacturing costs. Cost, Effectiveness of Reliable Switching

Active Publication Date: 2017-01-11
ZHEJIANG CROWN POWER TOOLS MFG
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] When the metal bow is used for speed switching, the metal bow will produce a certain amount of deformation in the radial direction during the process of switching gears. At present, this amount of deformation is difficult to control with the traditional structure, and this amount of deformation is likely to increase. Cause the metal bow to disengage from the movable ring gear or interfere with the casing
[0004] In the process of shifting, there wi...

Method used

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Embodiment Construction

[0019] The basic structure of the power tool of the present embodiment is as figure 1 and figure 2 Shown, for example, is a cordless electric drill or a cordless screwdriver, including a motor 5, a transmission 3 and a working head 1. The transmission device 3 includes a plurality of sun gears and planetary gears, which are not shown in the figure, and can be referred to the structural description of Chinese patent CN1317108C. It also includes an operating element 4, which moves along directions 10, 11 to realize speed switching of at least two gears.

[0020] The transmission mechanism 7 is configured as a metal bow, which can perform a pivoting movement relative to the housing 2, such as image 3 and Figure 4 As shown, the two end positions of the metal bow correspond to the two gear positions of the transmission 3 , that is to say the locking positions of the operating element 4 and the transmission mechanism 7 .

[0021] Such as image 3 As shown, the swing of the m...

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Abstract

The invention relates to a power tool. The power tool is provided with a gear-shiftable transmission device. The transmission device has at least two gears, and an operator can achieve gear shifting by controlling an operating element arranged on a shell. According to the power tool, the locking position of the operating element is determined through coupling of the operating element, an elastic element, a transmitting mechanism and the tool shell, and the locking position corresponds to one gear of the transmission device. Deformation of the elastic element is used for replacing elastic deformation of the transmitting mechanism, so that the manufacturing cost is greatly reduced while the operating reliability and stability are improved.

Description

technical field [0001] The invention relates to a power tool with a shiftable transmission. Background technique [0002] A power tool, especially a hand electric drill, includes at least two high and low gears. In CN1317108C, a shifting device for a multi-stage transmission of an electric tool is described. In this case, the adjusting movement of the shift slide is transmitted by means of a metal bow. Such a structure is widely used in current electric tools. [0003] When the metal bow is used for speed switching, the metal bow will produce a certain amount of deformation in the radial direction during the process of switching gears. At present, this amount of deformation is difficult to control with the traditional structure, and this amount of deformation is likely to increase. Cause the metal bow to disengage from the movable ring gear or interfere with the casing. [0004] In the process of shifting gears, there will also be a problem that the adjustment cannot be ...

Claims

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Application Information

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IPC IPC(8): B25F5/00B23B45/02B25B21/00
Inventor 孟超
Owner ZHEJIANG CROWN POWER TOOLS MFG
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