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Helical spur gear with Batuwan helix tooth profile

A technology of helical cylindrical gears, Batuvan helix, applied in the direction of toothed elements, belts/chains/gears, portable lifting devices, etc., can solve the problem of limited radius of curvature of meshing tooth profile, short service life, contact strength It can improve the contact fatigue strength, increase the coincidence degree, and improve the bending fatigue strength.

Inactive Publication Date: 2015-08-12
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

The most widely used tooth shape is the involute tooth shape. Although the involute tooth shape has been developed quite well, there are still some defects: such as: the radius of curvature of the meshing tooth profile is limited, and the contact strength is poor, especially in some heavy Short service life under load

Method used

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  • Helical spur gear with Batuwan helix tooth profile
  • Helical spur gear with Batuwan helix tooth profile
  • Helical spur gear with Batuwan helix tooth profile

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] Such as figure 2 As shown, the tooth shape of the helical cylindrical gear of the present invention from the dedendum circle to the addendum circle is a Batuwan spiral tooth shape, that is, the pressure angle a=17 0 ~28 0 A segment of is the Batuwan spiral.

[0027] Such as figure 1 , figure 2 As shown, the Batuwan spiral is formed by a series of one-sixth circular arcs with the Batuwan number as the radius value connected back and forth. The said Batuwan spiral is determined by the following formula:

[0028] When n=0, 1, 2,

[0029] When n=3,

[0030] When n≥4, m=n,

[0031] in:

[0032] When m=0, x m ′ = 0 y m ...

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Abstract

The invention discloses a helical gear with a Padovan helix tooth form. The tooth form of an end face of the helical gear from a root circle to an addendum circle is the Padovan helix tooth form, namely a section with a pressure angle a=170-280 is the Padovan helix. The gear center is arranged at the position where theta=0 on the Padovan helix. A pitch circle of the gear passes through the position where theta=40 degrees on the section of Padovan helix where the gear center is located. The section of Padovan helix between the root circle and the addendum circle is used as the tooth form. The radius of curvature of the tooth form changes along with values of n and is Pn. Compared with an involute, the thickness of the root is increased. Due to the fact that the radius of curvature of the Padovan helix tooth form is increased compared with that of an involute tooth form, the thickness of the root is increased, endurance bending strength of the root is improved, and under the high-speed heavy load, the service life of the gear is prolonged. According to the Padovan helix tooth form, the tooth width is limited, overlapping ratio of the Padovan helix tooth form can be improved, and continuous meshing conditions of the gear are guaranteed. Meanwhile, meshing contact area is increased, and gear load-bearing capacity is improved.

Description

technical field [0001] The invention relates to a gear, in particular to a helical spur gear with a Barduvin helical tooth shape. Background technique [0002] With the development of production, the power of gear transmission is increasing day by day, and the speed is getting higher and higher, so the choice of gear tooth profile curve is very important. The most widely used tooth shape is the involute tooth shape. Although the involute tooth shape has been developed quite well, there are still some defects: such as: the radius of curvature of the meshing tooth profile is limited, and the contact strength is poor, especially in some heavy The service life of the loading occasion is short. Therefore, in order to meet the high-speed and heavy-duty requirements of gear transmission, how to overcome the shortcomings of involute gear transmission and prolong the service life of gears is imminent. [0003] The Padovan Sequence is an integer sequence starting from the initial va...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H55/17F16H55/08
Inventor 冯兰兰金亭亭汪久根吴长鸿
Owner ZHEJIANG UNIV
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