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Skew linear gear mechanism for constructing drive line teeth by means of planar Archimedes spiral

A technology of Archimedes spiral and gear mechanism, which is applied in the direction of gear transmission, elements with teeth, belt/chain/gear, etc., to achieve the effect of reducing spatial dimension and difficulty

Active Publication Date: 2017-12-08
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current cross-axis gear pair, there is no transmission form in which the driving wheel is constructed in a planar shape

Method used

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  • Skew linear gear mechanism for constructing drive line teeth by means of planar Archimedes spiral
  • Skew linear gear mechanism for constructing drive line teeth by means of planar Archimedes spiral
  • Skew linear gear mechanism for constructing drive line teeth by means of planar Archimedes spiral

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0077] Implementation example: wire gear pair suitable for 3D printing

[0078] In this implementation case, in order to ensure the rigidity of the wire teeth, the cross section of the active wire teeth is designed as a diagonally supported structure. The contact line is on the left side of the wire gear base, and the right side is the supporting structure. To save material under the premise of maintaining rigidity, the wire tooth adopts a partial circular cross section. Such as Figure 5 shown.

[0079] In the above two formulas: the parameter equation of the active contact line is

[0080] The given design parameters are θ=135°, m=10, n=100, a=10, b=10, i 21 =0.25, Z 1 =10, Z 2 = 40, r 1 = 2, r 2 =2.

[0081] According to the above method, the equation of the tooth contact line of the driven wire is obtained as:

[0082]

[0083] The equation of the center line of the active wire tooth is:

[0084] The equation of the tooth centerline of the driven line is: ...

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Abstract

The invention discloses a skew linear gear mechanism for constructing drive line teeth by means of a planar Archimedes spiral. The skew linear gear mechanism comprises a transmission pair composed of a drive gear and a driven gear; a drive contact line is constructed by adopting the planar Archimedes spiral, a linear gear space curve meshing theory is met, that is to say, the drive contact line and a driven contact line which are conjugated in space achieve meshing transmission in the manner of point contact, the drive contact line and the driven contact line rely on the drive line teeth and driven line teeth respectively, and the drive line teeth and the driven line teeth are distributed on a gear body of the drive gear and a gear body of the driven gear; and a shaft of the drive gear and a shaft of the driven gear intersect at any angle, wherein the angle is any one angle ranging from 0 degree to 180 degrees. According to the skew linear gear mechanism, a cylindrical spiral which is commonly taken as the drive contact line by an original linear gear pair is replaced with the planar Archimedes spiral, the spatial dimension of the drive contact line is decreased, the skew linear gear mechanism can be conveniently combined with a technology taking planar machining as the principle thing in micro-nano manufacture, and application of a linear gear in the field of micro transmission is better promoted.

Description

technical field [0001] The invention relates to the field of novel gear transmission with small power and small size, in particular to an oblique axis gear mechanism with planar Archimedes helix to construct active wire teeth. Background technique [0002] Gear transmission is the most widely used transmission and speed change technology. Different from the conjugate surface meshing theory of the traditional involute gear pair, a new type of gear mechanism - the linear gear transmission pair, applies the space conjugate curve meshing theory, which can realize the transmission of axes intersecting or interlacing at any angle and the transmission of large transmission ratio. The wire gear is also called the space curve meshing wheel. During the transmission process, a pair of conjugated space curves participate in the meshing. The pair of space curves are respectively used as the active contact line and the driven contact line in the wire gear pair. The existing linear gear m...

Claims

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Application Information

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IPC IPC(8): F16H1/18F16H55/08
CPCF16H1/18F16H55/08F16H2055/173Y02T90/00
Inventor 陈扬枝谢雄敦李政吕月玲
Owner SOUTH CHINA UNIV OF TECH
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