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A linear gear mechanism with elastic variable transmission ratio

A technology of variable transmission ratio and wire gear, which is applied in belts/chains/gears, mechanical equipment, components with teeth, etc., can solve the problems that transmissions are not suitable for lightweight applications, etc., and achieve simple design, small mass and volume, The effect of wide shifting range

Active Publication Date: 2021-11-19
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In lightweight mechanical devices with limited size and weight, there are often transmission requirements for variable transmission ratios, which are sometimes not suitable for realization by means of control, and traditional transmissions are not suitable for lightweight applications

Method used

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  • A linear gear mechanism with elastic variable transmission ratio
  • A linear gear mechanism with elastic variable transmission ratio
  • A linear gear mechanism with elastic variable transmission ratio

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] The parameters of the given initial driving wire gear and driven wire gear are as follows:

[0066] The number of teeth of the driving wheel is 2 teeth, the diameter of the wire teeth is 3mm, the initial pitch is 120mm, and the length of the wire teeth is 2π; the number of teeth of the driven gear is 2 teeth, the diameter of the wire teeth is 3mm, the initial pitch is 120mm, and the length of the wire teeth is 2π;

[0067]

[0068] The equation of the driven contact line in its own coordinate system is:

[0069]

[0070] During the initial conditions, the transmission ratio of the gear pair of the example 1 is 1:1, and the actual effect is as follows figure 2 shown.

[0071] Further, change the pitch of the driven wheel so that the pitch of the contact line of the driven wheel changes to 60mm, and the pitch of the driving wheel does not change to 120mm. At this time, the equations of the active contact line and the driven contact line are:

[0072]

[0073] ...

Embodiment 2

[0082] Given that the initial number of teeth on the driving wheel is 4 teeth, the diameter of the wire teeth is 3mm, the initial pitch is 100mm, and the length of the wire teeth is 2π; the initial number of teeth on the driven gear is 2 teeth, the diameter of the wire teeth is 3mm, the initial pitch is 100mm, and the length of the wire teeth is 2π; only by adjusting the driving wire teeth and the pitch of the driven wire teeth, the transmission ratios that can be realized in Embodiment 2 include 1:2, 1:4, 1:6, 1:8, 1:1, and 1:3.

Embodiment 3

[0084] Given that the initial number of teeth on the driving wheel is 4 teeth, the diameter of the wire teeth is 4mm, the initial pitch is 140mm, and the length of the wire teeth is 2π; the initial number of teeth on the driven gear is 4 teeth, the diameter of the wire teeth is 4mm, the initial pitch is 140mm, and the length of the wire teeth is 2π; only by adjusting the driving wire teeth and the pitch of the driven wire teeth, the transmission ratios that can be realized in Embodiment 3 include 1:1, 1:2, 1:3, 1:4, 2:1, 2:3, 3:1, 3:2, 3 :4, 4:1, 4:3.

[0085] The principle of the present invention is: according to the wire gear space conjugate curve meshing theory, the parallel axis gear pair equation can be designed; the wire gear pair with variable pitch of the wire gear is designed, and the relationship between the pitch ratio and the transmission ratio of the wire gear pair is analyzed to obtain The pitch ratio is directly related to the transmission ratio; and the change...

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Abstract

The invention discloses a wire gear mechanism with variable transmission ratio. The mechanism consists of a pair of parallel axis gears to form a transmission pair, including a driving wheel and a driven wheel. The driving wheel and the driven wheel are both composed of a wheel body and wire teeth. The contact line of the wire teeth of the driving wheel and the wire teeth of the driven wheel meshes according to the space conjugate curve. The wire teeth on the driving wheel and the wire teeth on the driven wheel have elastic deformability. The pitch ratio can achieve the function of changing the transmission ratio of the gear pair, and the change law of the transmission ratio of the linear gear mechanism with variable transmission ratio is given. Further, the structure of the linear gear mechanism with variable transmission ratio is designed. The pitch of the driving wire gear and the driven wire gear of the present invention is adjustable, and by adjusting the pitch ratios of different driving wire gears and driven wire gears, different wire gear transmission ratios can be obtained to achieve stable transmission and an average transmission ratio Precise variable ratio transmission features.

Description

technical field [0001] The invention relates to the field of mechanical transmission, in particular to a step-variable elastic wire gear mechanism. Background technique [0002] The main function of the transmission is to change the transmission ratio to realize the function of different speed and torque transmission. According to whether the transmission can continuously change its transmission ratio within a range, the transmission can be divided into a stepped transmission and a continuously variable transmission. Common stepped transmissions include: geared stepped transmissions for automobiles, lathe hanging wheel boxes and sprocket transmissions, etc.; common continuously variable transmissions (CVT) include: metal belt continuously variable transmission and hydromechanical continuously variable transmission. The gear has a stepless transmission, the transmission is stable, and the transmission ratio is accurate; the sprocket has a stepless transmission, there are per...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H55/08F16H55/17F16H55/16G06F30/17
CPCF16H55/08F16H55/16F16H55/17F16H2055/0866
Inventor 陈扬枝何超刘雾焦自嘉
Owner SOUTH CHINA UNIV OF TECH
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