Stepless transmission

A technology of continuously variable transmission and variable speed ring, which is applied in the direction of gear transmission, friction transmission, transmission control, etc. It can solve the problems of small contact area at the power transmission, maximum torque and speed change stability limitations, etc., and achieve low cost, Low running wear and high reliability

Pending Publication Date: 2018-09-14
蔡有建
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the small contact area and relatively concentrated stress at the power transmission part of these forms of mechanical continuously variable automatic transmissions, the maximum torque that can be transmitted and the stability of shifting are limited, and they are currently only used in a small number of models.

Method used

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Embodiment Construction

[0045] There are at least the following two problems in the existing mechanical continuously variable automatic transmission (CVT), which limit the maximum transmission torque of the transmission:

[0046] 1. The working contact surface is limited. If the positive pressure used to generate friction is too large, it will easily cause excessive stress on the mechanism and cause failure;

[0047] 2. The frictional force for power transmission and the frictional resistance to be overcome for speed change are on the same contact surface, and both are sliding friction. If the frictional force for power transmission is increased blindly, the speed change cannot be carried out smoothly.

[0048] Therefore, if the existing mechanical continuously variable automatic transmission is applied to vehicles or equipment with high torque and high motion performance requirements, at least the following problems will exist:

[0049] 1) The transmission belt is easy to be damaged, so the requirem...

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Abstract

The invention discloses a stepless transmission, which comprises a planetary power transmission mechanism, a speed change ring and a transmission unit. The planetary power transmission mechanism at least comprises a power input part and a power output part, the power output part comprises an output shaft and at least one planetary driven part, each planetary driven part is connected with the output shaft to drive the output shaft to rotate and is arranged on the outer side of the power input part and capable of rotating around the power input part under the driving action of the power input part. The speed change ring is in surrounding connection with the at least one planetary driven part and capable of reciprocating in a first direction. The transmission unit at least comprises a pressing device which is arranged on the outer side of the speed change ring, and the pressing device is fixedly connected with the speed change ring to drive the speed change ring to reciprocate in the first direction and adjust the rotating speed of the power output part of the planetary power transmission mechanism.

Description

technical field [0001] The invention relates to a continuously variable transmission applicable to automobiles and other mechanical devices for transmitting power. Background technique [0002] As the core component of automobiles and other mechanical transmissions, automatic transmissions mainly include electromechanical automatic transmission (AMT), hydraulic automatic transmission (AT), dual clutch automatic transmission (DCT), and mechanical continuously variable automatic transmission (CVT). category. Among them, the mechanical continuously variable automatic transmission (CVT) can keep the engine speed in the most economical working area due to its characteristics of continuous speed change and continuous power output during the speed change process, so that it can be used in vehicles or similar machines under the same conditions. Among the devices, the fuel consumption is the lowest and the operation is the smoothest. In addition, the mechanical continuously variabl...

Claims

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Application Information

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IPC IPC(8): F16H3/76F16H25/20F16H61/26F16H61/66
CPCF16H3/76F16H25/20F16H61/26F16H61/66F16H2061/2884F16H15/50F16H63/067
Inventor 蔡有建
Owner 蔡有建
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