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Design method for shrinkage tooth curved-tooth noncircular bevel gear

A non-conical gear, design method technology, applied to components with teeth, belts/chains/gears, calculations, etc., can solve the problems of straight tooth non-conical processing difficulties, poor versatility, and low processing efficiency

Active Publication Date: 2015-05-06
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, more studies on the design of non-conical gears are straight-toothed non-conical gears, but it is difficult to process straight-toothed non-conical gears. The current processing methods mainly include five-axis linkage CNC machining, wire cutting and gear planing. However, all three methods have the disadvantages of poor versatility and low processing efficiency.

Method used

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  • Design method for shrinkage tooth curved-tooth noncircular bevel gear
  • Design method for shrinkage tooth curved-tooth noncircular bevel gear
  • Design method for shrinkage tooth curved-tooth noncircular bevel gear

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Experimental program
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Embodiment Construction

[0070] The parameters of known non-circular gears are as follows

[0071] Table 1 gear parameters

[0072]

[0073] The normal surface shape of the spiral bevel gear milling cutter corresponding to the parameters in the above table, and its corresponding coordinates (x v ,y v ),Such as figure 1 Shown:

[0074] 1. Determine the pitch cone surface of the shrinking arc tooth non-conical gear

[0075] According to the transmission ratio given above, the pitch angles of the driving and driven wheels are obtained according to formula (2), which are respectively:

[0076]

[0077] Therefore, the pitch cone surfaces of the driving and driven wheels are obtained according to formula (1), which are respectively:

[0078]

[0079]

[0080] its shape like figure 2 shown.

[0081] 2. Determining the parameters of shrinking arc tooth non-conical gear

[0082] 1. Calculate the tip cone angle δ according to formula (9) according to the modulus m of the gear milling cutter...

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Abstract

The invention discloses a design method for a shrinkage tooth curved-tooth noncircular bevel gear. A knife disk of a standard spiral bevel gear is used as a generating gear, a real tooth surface of the curved-tooth noncircular bevel gear is obtained according to the meshing principle and spatial coordinate transformation, and the generating principle of the curved-tooth noncircular bevel gear is similar to that of a shrinkage tooth spiral bevel gear. The shrinkage tooth curved-tooth noncircular bevel gear designed by the method has a series of advantages that bearing capacity is high, contact ratio is high, and the tooth surface contact area can be regulated; meanwhile, gear ratio transmission of intersecting shafts is achieved, and what is more important is that the shrinkage tooth curved-tooth noncircular bevel gear can be efficiently generated and processed on a five-axis curved-tooth bevel gear milling machine.

Description

technical field [0001] The invention relates to a design method of a spiral bevel gear, in particular to a design method of a shrinking-tooth spiral-tooth non-conical gear. Background technique [0002] Non-circular gears are used to transmit non-uniform motion between two shafts. Compared with other non-uniform speed ratio transmission mechanisms (such as cams, connecting rods, etc.), they have the advantages of stable transmission, compact structure, and high motion precision. In the design of mechanical products, non-circular gears are used in mechanical equipment such as textiles, cigarettes, and papermaking due to their characteristics of non-uniform speed transmission. However, because the pitch curve is non-circular, the design and manufacture are much more complicated than circular gears, and three-dimensional modeling is particularly difficult. [0003] Compared with non-cylindrical gear transmission, non-conical gear can realize space-staggered shaft speed ratio t...

Claims

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Application Information

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IPC IPC(8): G06F17/50F16H55/17
Inventor 华林郑方焱韩星会
Owner WUHAN UNIV OF TECH
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