Design calculation method for reverse involute gear transmission meshing

A technology of involute gear design and calculation, applied in the direction of calculation, components with teeth, belts/chains/gears, etc., can solve the problems of short life of gears, low reliability, large contact stress at contact points, etc., and achieve improvement Effects of carrying capacity, relaxing error, and reducing difficulty

Active Publication Date: 2019-05-14
重庆模源齿轮有限公司
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Problems solved by technology

[0002] The involute gear is an outer convex tooth profile composed of two symmetrical involutes. During the transmission process, the tooth profile is in convex-convex contact. According to the theory of Hertz (H.Hertz) spherical contact stress, the convex-convex contact is elastic deformation and stress concentration At the con

Method used

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  • Design calculation method for reverse involute gear transmission meshing
  • Design calculation method for reverse involute gear transmission meshing
  • Design calculation method for reverse involute gear transmission meshing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0473] Embodiment 1: large transmission ratio gear transmission calculation, such as Figure 15 and Figure 16 shown

[0474] The first gear of 6T53 automobile gearbox adopts the improved design of dotted line gear. Transmission input torque 1516Nm (output torque 7200Nm), installation center distance a=123, required transmission ratio i=4.5~5, material selection 20CrMnTi carburizing and quenching, material characteristic coefficient ΔE=8.84×10-6 characteristic system, allowable bending stress [σ] F =420Mpa, allowable contact stress [σ] H =730Mpa, the other parameters are selected according to the standard. According to the calculation, actually determine the pinion z 1 = 8, large gear z 2 =38, modulus m n =5.75, pressure angle α n =22.5°, helix angle β=7°. See Table 1-1 for specific calculations.

[0475] Table 1-1 Point-line gear transmission design calculation table

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[0481] Table 1-2 Gear parameter table...

Embodiment 2

[0489] Embodiment 2: the gear transmission calculation (as Figure 17 shown)

[0490] Steyr drive axle spur gear, center distance a=193, transmission ratio i=1, modulus m determined according to transmission output torque n =5.25, pressure angle α n =20°, the number of gear teeth z 1 = z 2 =35, helix angle β=15°. Adopt the improved design of point-line gear, calculate and determine the modulus m n =6.5, pressure angle α n =22.5°, helix angle β=15°, number of gear teeth z1 =z 2 =31, the tooth width 36 remains unchanged. The calculation process is shown in Table 2-1.

[0491] Table 2-1 Calculation table for gear transmission design with the same number of teeth (i=1)

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[0498] Table 2-2 Gear parameter table (dotted line gear i=1)

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[0500] Table 2-3 Gear parameter list

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[0502]

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Abstract

The invention discloses a design calculation method for reverse involute gear transmission meshing. The design calculation method for the reverse involute gear transmission meshing comprises the following steps that modeling is carried out based on a gear base circle to establish a functional relation of a reverse involute; related meshing equations are deduced; the value of the gear modificationcoefficient of the reverse involute is confirmed; transmission parameters of the reverse involute are calculated; the calculated transmission parameters are checked; and the gear machining quality ischecked. A meshing track of a reverse involute tooth profile is designed on an involute gear, the bearing capacity of a main working face can be improved. Because the elastic deformation is consideredin the design, and the stress deformation of the gear is corrected by using the elastic deformation amount, the requirement of an elastic conjugate tooth profile curve is further met, the manufacturing error of the gear can be relaxed appropriately, and the difficulty of the gear manufacturing meeting the precision requirement is reduced.

Description

technical field [0001] The invention relates to the field of gear manufacturing, in particular to a design calculation method for reverse involute gear transmission meshing. Background technique [0002] The involute gear is an outer convex tooth profile composed of two symmetrical involutes. During the transmission process, the tooth profile is in convex-convex contact. According to the theory of Hertz (H.Hertz) spherical contact stress, the convex-convex contact is elastic deformation and stress concentration At the contact point, it is distributed from large to small with the deformation area, and the contact stress at the contact point is large. In the high power and high power transmission, the gear is mostly damaged by pitting corrosion, so the gear life is short, the reliability is low, and the transmission mechanism Maintenance costs are high. There are two forms of gear transmission: space crossing and plane. Involute cylindrical gears are generally plane transmiss...

Claims

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Application Information

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IPC IPC(8): F16H55/08G06F17/50
Inventor 谭富春
Owner 重庆模源齿轮有限公司
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