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A compound shifting gear

A technology of shifting gears and gears, which is applied to belts/chains/gears, components with teeth, portable lifting devices, etc., can solve the problems of difficult processing of gears with variable tooth thickness, large meshing noise of variable tooth thickness gears, etc., and achieve Avoid the effect of excessively wide noise frequency band and reduce noise

Active Publication Date: 2017-03-29
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a compound shifting gear with easy processing and low meshing noise to solve the problem of difficulty in processing the variable tooth thickness gears in the prior art and the large meshing noise of the variable tooth thickness gears in the prior art
Combining gears to form variable-tooth-thickness compound displacement internal gears, because the thickness of a single gear is small, it is easy to meet the processing requirements, the gear processing technology is good, and the application of simple technology can complete the hard tooth surface and high-precision variable Tooth thickness gear processing solves the problem of difficult processing of variable tooth thickness gears in the prior art, and can improve the bearing capacity and running accuracy of the transmission device

Method used

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  • A compound shifting gear
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  • A compound shifting gear

Examples

Experimental program
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Embodiment 1

[0028] exist figure 1 figure 2 In the shown embodiment 1, a compound displacement gear is composed of 10 annular gear pieces with the same number of teeth and a thickened tooth shape. The teeth of the gear pieces are arranged on the ring On the inner circumference of the tooth piece, the tooth piece includes an outer tooth piece 1 arranged at both ends of the gear axial direction and 8 inner tooth pieces 2 located between the two outer tooth pieces (see image 3 ), the thickness of all the inner gears is equal, the thickness of the outer gears is 4 times the thickness of the inner gears, the vibration and noise reduction plates 3 are embedded between the adjacent gears, and a total of 9 vibration and noise reduction plates are set sheet, the thickness of the vibration and noise reduction sheet is 30% of the thickness of the inner tooth sheet, and the ring of the tooth sheet is provided with a number of fixing holes 5 for fixing the tooth sheet, the diameter of the addendum c...

Embodiment 2

[0030] The gear in Example 2 is a helical gear, and the thickness of the 7 internal gears in the gear is equal. The thickness of the vibration and noise reduction sheet is greater than the thickness of the vibration and noise reduction sheet on the side of the inner gear with a smaller tooth thickness. The thickness of the vibration and noise reduction sheet changes linearly along the gear axis, and the minimum vibration and noise reduction sheet The thickness is 16% of the thickness of the inner gear, the maximum thickness of the vibration and noise reduction plate is 30% of the thickness of the inner gear, the thickness of the outer gear is equal and its thickness is 3 times that of the inner gear, and the rest are the same as in Example 1 same.

Embodiment 3

[0032] In Embodiment 3, the gear includes 9 internal gears and 10 vibration-reducing and noise-reducing plates. The internal gears have different thicknesses, and the thickness of the inner gear with a smaller tooth thickness is greater than that of the inner gear with a larger tooth thickness. Thickness, the thickness of the maximum thickness internal gear is 1.8 times the thickness of the minimum thickness internal gear, the thickness of the internal gear changes linearly along the gear axis, the thickness of all vibration and noise reduction plates is equal and its thickness is the largest internal tooth 18% of the sheet thickness, the thickness of the external tooth sheet is equal and its thickness is 2.5 times of the thickness of the largest internal tooth sheet, all the other are the same as embodiment 1 or embodiment 2.

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Abstract

The invention discloses a composite gear with addendum modification, which is composed of a plurality of circular toothed pieces in sequence, wherein all circular toothed pieces have same tooth number and thickening tooth shapes; the gear teeth of each toothed piece are arranged on the inner circumference of the corresponding circular toothed piece; toothed pieces comprise outer toothed pieces and inner toothed pieces; each inner toothed piece is positioned between two corresponding outer toothed pieces; a vibration-damping noise-reducing piece is embedded between the adjacent toothed pieces; the circular ring of each toothed piece is provided with a plurality of installation holes which are used for fixing the toothed pieces; the tooth top circle diameter, the tooth root circle diameter and the tooth thickness of each toothed piece are all progressively increased or reduced along the same axial direction of the gear; a complete composite inner gear structure with addendum modification and variable tooth thickness is formed by the inner toothed pieces, the outer toothed pieces and the vibration-damping noise-reducing pieces. According to the composite gear with addendum modification, a variable tooth-thickness gear is formed in a toothed piece combination manner, and the machinability of gear machining is good; the vibration-damping noise-reducing pieces are bonded between the toothed pieces, so that the meshing vibration of the gear is inhibited from the source, the transmission noise is reduced, and the service life of a gear pair is prolonged.

Description

technical field [0001] The invention relates to the technical field of gear transmission, in particular to a compound displacement gear, which has a complete compound displacement internal gear structure with variable tooth thickness. Background technique [0002] As an important transmission part of the modern automobile industry, the gearbox is one of the main sources of vibration and noise during the operation of the automobile, and its working performance has an important impact on the entire vehicle. Car manufacturers also attach great importance to reducing the vibration and noise of the gearbox, and regard it as a highlight of new cars. Gear meshing generates vibration, which is transmitted to the gear box through the shaft and bearing housing, causing the box to vibrate and radiate noise at the same time. The vibration of the gear meshing interface is the decisive excitation of structural noise. How to suppress the vibration generated by the meshing and reduce the n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H55/17F16H55/14
CPCF16H55/14F16H55/17
Inventor 刘富豪蒋汉军张海涛徐进于学华
Owner YANCHENG INST OF TECH