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Centrifugal clutches, variable speed power tools

A technology for centrifugal clutches and clutch shafts, which is applied in the manufacture of tools, transmissions, gear transmissions, etc., and can solve problems such as gear shifting blockage, unsmooth shifting, and reduced user experience

Inactive Publication Date: 2017-02-15
舒捷医疗科技(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the actual shifting process, when the key enters the keyway provided on the driving wheel in the axial direction, it is easily blocked by the edge of the driving wheel, so that the gear shifting is blocked, making the shifting not smooth, and reducing the user's experience

Method used

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  • Centrifugal clutches, variable speed power tools
  • Centrifugal clutches, variable speed power tools
  • Centrifugal clutches, variable speed power tools

Examples

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Embodiment Construction

[0038] Specific embodiments of the present invention will be further described in detail below.

[0039] Such as Figure 1 to Figure 7 Shown, a kind of centrifugal clutch of the present invention comprises:

[0040] The first driving wheel 10 and the second driving wheel 10', all the driving wheels (refer to the first driving wheel 10 and the second driving wheel 10' in this embodiment, the same below) are distributed along the same axial direction, and drive with different reduction ratios The rotational speed of the mechanism, such as the multi-stage drive wheels in a common planetary gear reducer, each drive wheel is provided with at least one groove 12 on the outer peripheral wall;

[0041] A clutch shaft 14, a plurality of transmission pins 16 are arranged on the clutch shaft 14, and the clutch shaft 14 limits the transmission pins 16 to move freely only along the radial direction of the drive wheel, so as to enter or leave the groove 12 on the drive wheel; One group of...

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Abstract

The invention discloses a centrifugal clutch. The centrifugal clutch comprises a plurality of coaxial drive wheels. At least one groove is formed in the peripheral wall of each drive wheel. The centrifugal clutch further comprises a clutch shaft and a gear shifting piece, wherein a plurality of transmission pins are arranged on the clutch shaft and can only freely move in the radial direction of the drive wheels so as to enter or leave the grooves in the drive wheels, the gear shifting piece can drive the transmission pins to move towards the drive wheels so as to enter the grooves, and when one transmission pin enters the corresponding groove, the other transmission pins are disengaged from the corresponding grooves under the action of the centrifugal force generated when the clutch shaft rotates. According to the centrifugal clutch, the clutch gear shifting function is achieved through the gear shifting piece and the centrifugal force and the combination of the multiple sets of transmission pins and different drive wheels. The invention further discloses an electric tool with the centrifugal clutch, and compared with other electric tools with gears capable of being shifted, the electric tool has the advantages of being simple in structure, convenient to operate and the like.

Description

technical field [0001] The invention relates to a centrifugal clutch and a variable-speed electric tool using the centrifugal clutch. Background technique [0002] A clutch is a commonly used component, mainly used to change the speed ratio during the transmission of speed between the driving part and the driven part. A centrifugal clutch is a clutch that utilizes the centrifugal force generated by the active part or the driven part during high-speed rotation to realize the gear shifting function. Clutches can be widely used in motor vehicles, electric tools and other fields. For example, in the field of electric tools, including electric drills, electric wrenches and other tools, the power is provided by the motor, and the output speed of the motor is relatively high. Therefore, it is first necessary to decelerate the output speed of the motor. The reduction box can be equipped with multiple drive wheels with different speed ratios. Through a clutch selection and combinat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H3/085B25F5/00
CPCB25F5/001F16H13/04
Inventor 叶宏杰
Owner 舒捷医疗科技(苏州)有限公司
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