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Plastic bevel gear

A technology of helical gears and plastics, applied in the field of plastic helical gears, can solve the problems of thinning of the tooth tip and the reduction of the impact resistance of the gear teeth, and achieve the effects of easy molding, weight reduction and volume reduction.

Inactive Publication Date: 2011-09-07
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the pressure angle on both sides of the gear is increased at the same time, the tooth top will become thinner, that is, the impact resistance of the gear teeth will decrease

Method used

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  • Plastic bevel gear
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Examples

Experimental program
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Embodiment Construction

[0018] See Figure 1-2 , the tooth shape of the plastic helical gear in this embodiment mainly includes the tooth top 1, the left tooth surface (that is, the left involute tooth profile) 6 generated by the second base cylinder 5, and the right tooth surface generated by the first base cylinder 3. The side tooth surface (that is, the right involute tooth profile) 7 and the dedendum 4. When the gear is working, the left tooth surface 6 with a large pressure angle participates in meshing, and the right tooth surface 7 with a small pressure angle does not participate in meshing.

[0019] The formation of the tooth profile surface of the non-meshing side of the helical gear: take the line segment r bc Draw the first base cylinder surface of the helical gear as the radius, and there is a first occurrence surface Q that is tangent to the first base cylinder surface, and the angle between the first line segment KK on the first occurrence surface Q and the axis of the first base cylin...

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Abstract

The invention provides a plastic bevel gear which has the characteristics that not only can the fatigue strength resistant of a tooth root be improved, but also the impact-resistant property is not influenced. For the formation of an non-meshed side tooth profile curved surface, a first base cylindrical surface of the bevel gear is drawn up with the radius of a line segment rbc; a first generating plane is tagent to the first base cylindrical surface; an included angle between a first line segment on the first generating plane and the axis of a first base cylinder is beta bc, when the first generating plane performs pure rolling without sliding along the first base cylindrical surface, the track of the first line segment is an non-meshed side tooth profile curved surface; for the formation of a meshed side tooth profile curved surface, a second base cylindrical surface of the bevel gear is drawn up with the radius of a line segment rbd, wherein rbc / rbd=1-1.36; and when a second generating plane is tangent to the second base cylindrical surface, a second line segment MM on the second generating plane and the axis of the second base cylinder form an included angle beta bd, and when the second generating plane performs pure rolling without sliding along the second base cylindrical surface, the track of the second line segment is a meshed side tooth profile curved surface. According to the invention, different moduli are adopted for each part of the gear, and a design method of modification coefficients is used.

Description

technical field [0001] The invention relates to the technical field of gear design, in particular to a helical gear made of plastic. Background technique [0002] Due to the advantages of high power, high efficiency and long life, gear transmission is widely used in various mechanical transmission mechanisms. Its performance and quality will ultimately affect the quality of the machine. Therefore, in order to adapt to the rapid development of modern mass production and technology, the performance of gear transmission is required to be continuously optimized. Especially in recent decades, great progress has been made in the meshing theory of gears, calculation and test of bearing capacity, vibration and noise, and new gear transmission. [0003] Plastic gears have been used extensively since the fiber nylon was developed in the 1930s. Compared with metal gears, plastic gears have the advantages of small friction, light weight, low noise, corrosion resistance, and insensitiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H55/08F16H55/06F16H55/17
Inventor 李秀莲王贵成赵景波朱福先王志周金宇
Owner JIANGSU UNIV OF TECH
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