Planet gear driven mechanical stepless automatic transmission

Abstract

The invention discloses a planet gear driven mechanical stepless automatic transmission, which comprises a power input shaft, a hollow shaft I, an intermediate shaft, a power output shaft, a reversing mechanism, a big gear ring I, at least two groups of planet mechanisms uniformly distributed in the big gear ring I, a driving gear I, an oil pump, a driven gear I arranged on the input shaft of the oil pump, a piston type oil cylinder, a pressure adjusting valve and a gear rack component. The power is transmitted to a driving gear II, a driving pinion, an idle wheel, an intermediate gear ring and a big gear ring of the planet mechanism through the power input shaft and finally gathered to the intermediate shaft; stepless automatic speed change can be realized by controlling an automobile engine accelerator and adjusting the pressure adjusting valve; reversing, idling or advancing operation is realized by the reversing mechanism; and the transmission has the characteristics of energy conservation, environment friendliness, wide application range and the like.

Description

technical field [0001] The invention relates to a transmission, in particular to a planetary gear transmission mechanical continuously variable automatic transmission. Background technique [0002] At present, there are many types of transmissions used in automobile transmissions on the market, including manual gear shifting and stepped type (such as: German ZF series transmission); hydraulic type and electro-hydraulic linkage type (such as: Belarus series in Belarus) and Automatic shifting type (such as: Allison (Allison)-CLBT series transmission of General Motors Co., Ltd. of the United States), etc. [0003] However, the transmissions used in the above-mentioned transmissions all have the following disadvantages: one, a large waste of fuel; two, serious environmental pollution by exhaust emissions; R & D and improvement, using sliding friction to change the diameter ratio of the main and driven wheels to achieve stepless speed change. Because the sliding friction coeffic...

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Problems solved by technology

[0003] However, the transmissions used in the above-mentioned transmissions all have the following disadvantages: one, a large waste of fuel; two, serious environmental pollution by exhaust emissions; R & D and improvement, using sliding friction to change the diameter ratio of the main and driven wheels to achieve stepless speed change. Because the sliding friction coefficient of the material is about 0.1, it is necessary to generate a positive pressure ten times greater than that to transmit the engine power, which not only consumes a lot of energy, but also has low efficiency. The gearbox is deformed, the noise is loud, and maintenance is inconvenient, so it can only be used in some cars

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