Gear drive mechanism of rotating shaver

Abstract

The invention relates to a gear drive mechanism for rotary-type razors, which comprises a driving gear arranged on a motor shaft, as well as a gear drive mechanism between the driving gear and a half-coupling. The mechanism is characterized in that the driving gear and the gear drive mechanism between the driving gear and the half-coupling consist of a cylindrical bevel gear and a plurality of cylindrical gears; the cylindrical bevel gear is a bevel gear capable of meshing with an involute cylindrical gear; the forming principle of a tooth profile of the cylindrical bevel gear is to obtain a conjugate tooth profile by using an involute gear slotting tool to perform generating machining to a bevel gear blank under the conditions that a gear shaping tool and two axes of the gear blank intersect and are at a set included angle. The drive mechanism has the advantages of greatly simplifying technological requirements on manufacture and assembly, reducing cost, improving product quality andwell solving problems existing in the prior art, along with low noise and long life span.

Description

technical field [0001] The invention relates to a gear transmission mechanism of a rotary shaver. Background technique [0002] The gear transmission mechanism ( figure 1 ) usually includes a spur gear z 1 ,z 2 ,z 3 ,z 4 gear train, drive gear z 1 Installed on the motor shaft, the gear z 2 and gear z 3 It is a double gear, the driving gear z 1 drive gear z 2 , gear z 3 drives three gears z with the same function 4 And it drives three razor groups to work at the same time through the coupling elastically combined with it to realize the shaving function. Because this kind of gear transmission mechanism is meshed with cylindrical gears, the axis of the motor is parallel to the axis of the razor unit. Most of the time when using it, the wrist and elbow need to rotate upwards by 30-60°. Therefore, the handle is designed for the comfort of use. (that is, the body) and the position of the razor unit, it is required that the razor unit and the centerline of the handle (i...

AI Technical Summary

Problems solved by technology

Although this solution solves the problem of the angle between the plane of the razor unit and the handle, because the installation position of the bevel gear is much higher than that of the cylindrical gear, the cone tops of the two gears must overlap in addition to the angle requirements, otherwise the gears cannot mesh normally. When the noise is high, the gears will wear out rapidly, and the mechanism will fail quickly. Therefore, the requirements for product production and assembly are very high, resulting in low product yield, high production costs, and short service life.

In addition, the electric shaver is a high-speed rotating mechanism (the output speed of the motor is about 8000rpm), and the parts are plastic products. The manufacturing precision and installation technical requirements of the bevel gear and the gear frame have far exceeded the economic precision range of plastic products, and the operation of the device is stable. , instantaneous speed ratio, and noise level are difficult to meet the economic and technical requirements

So so far, there is no gear transmission mechanism that can solve the above problems well.

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