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double involute gear

A double involute and involute technology, applied in the direction of belts/chains/gears, components with teeth, portable lifting devices, etc., can solve the problems of high center distance accuracy, difficult manufacturing, no separability, adaptability Sex and other issues, to achieve the effect of increasing the contact area, not easy to pitting failure, and improving the service life

Active Publication Date: 2018-05-22
重庆市尔汉科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the center distance between the two gears requires high precision, no separability, no adaptability, and difficult to manufacture

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0435] Embodiment 1: single large negative gear meshing transmission

[0436] The first-gear gear of the 6T53 automobile gearbox, the installation center distance is a=123, and the transmission ratio is required to be i=5. According to the calculation, actually determine the pinion z 1 =9, large gear z 2 =43, modulus m n =5, pressure angle α n =22.5°, helix angle β=8.1272222222° (8°7'38"). Specific gear and hob parameters are shown in Table 1~Table 2:

[0437] Table 1: Gear parameter table (single large negative gear transmission)

[0438]

[0439]

[0440] Table 2: Hob parameter table (big gear)

[0441] serial number

Embodiment 2

[0442] Embodiment 2: double large negative gear meshing transmission (i=1)

[0443] Steyr drive axle cylindrical gear, center distance a=193, transmission ratio i=1, calculate and determine pinion z 1 = 31, large gear z 2 =31, modulus m n =6.5, pressure angle α n =22.5°, helix angle β=14.92833333° (14°55'42"). Specific gear and hob parameters are shown in Table 3 and Table 4:

[0444] Table 3: Gear parameter table (double large negative gear transmission i=1)

[0445]

[0446]

[0447] Table 4: Hob parameter table

[0448] serial number

Embodiment 3

[0449] Embodiment 3: double large negative gear meshing transmission (i>1)

[0450] Steyr drive axle cylindrical gear, center distance a=193, transmission ratio i=1.2, pinion z is used for calculation 1 =28, large gear z 2 =34, modulus m n =6.5, pressure angle α n =22.5°, helix angle β=14.92833333° (14°55′42″), tooth width b=36. Specific gear and hob parameters are shown in Table 5 to Table 7:

[0451] Table 5: Gear parameter table (double large negative gear transmission i>1)

[0452]

[0453]

[0454] Table 6: Hob parameter table (pinion)

[0455] serial number

parameter name

the symbol

value

Remark

1

modulus

m n

6.5

2

Pitch circle normal pressure angle

α n

22.5°

3

Effective tooth height

h

10.675

Excluding addendum chamfer height

4

Boundary scalloped thickness

S Jl

8.708

5

Boundary crest height

h Ja

3.048

Pitch thi...

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PUM

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Abstract

The invention discloses a double-involute gear. Working tooth profiles of gear teeth of the gear comprise two or three sections of smoothly connected involutes; the working tooth profile of the gear teeth at the gear top is a first involute part outwards projected; and the working tooth profile at the gear root part is a second involute part inwards recessed. The double-involute gear is strong in adaptability and excellent in exchangeability, and reduces the manufacturing difficulty thereof; and the tooth profile contact areas can be increased in use, so that the contact stress is low, the contact strength is higher, the pitting failure is not easy to be generated, and the service life can be prolonged.

Description

technical field [0001] The invention relates to the technical field of gear transmission in mechanical transmission, in particular to a double involute gear. Background technique [0002] Mechanical transmission refers to the transmission that uses mechanical means to transmit power and motion. The types of commonly used mechanical transmission systems include gear transmission, worm gear transmission, belt transmission, chain transmission, and wheel train. Among them, gear transmission is the most widely used form of transmission in mechanical transmission. Its transmission is relatively accurate, high in efficiency, compact in structure, reliable in operation and long in life. During gear transmission, the tooth profiles of the two wheels must meet the following conditions: "No matter where the two tooth profiles are in contact, the common normal line passing through the contact point must pass through the fixed point C on the connecting center line - the node." This is a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H55/17F16H55/08
CPCF16H55/0806F16H55/17
Inventor 谭富春
Owner 重庆市尔汉科技有限公司
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