A six-forward-inverted four-degree-of-freedom planetary transmission with fewer planetary arrangements

Abstract

The invention provides a four-degree-of-freedom planetary transmission with few planetary lines, six forward gears and one reverse gear. The four-degree-of-freedom planetary transmission comprises a transmission shell, the simple planetary lines, a clutch, brakes, an input shaft and an output shaft, wherein the input shaft and the output shaft penetrate through the two ends of the transmission shell correspondingly; the simple planetary lines are sequentially arranged in the axial direction from the input shaft to the output shaft, and the brakes and the simple planetary lines are arranged correspondingly; and each planetary line comprises a sun wheel, a planetary wheel, a gear ring and a planetary carrier, wherein the planetary wheel and the gear ring are sequentially arranged on the sunwheel in the radial direction, and the planetary carrier is connected with a rotating shaft of the planetary wheel. According to the four-degree-of-freedom planetary transmission with the few planetary lines, the six forward gears and one reverse gear, convenient and fast gear shifting is achieved through specific connection and simple operation of the simple planetary lines, the clutch and the brakes, the transmission ratio is high, the four-degree-of-freedom gear positions with the six forward gears and one reverse gear can be achieved, the multiple gear positions can be achieved only through the few planetary lines, the space is effectively saved, switching between the most adjacent gear positions can be achieved only through switching of a control element, and the gear shifting smoothness is effectively improved; and the design is novel, and manufacturing is convenient.

Description

technical field [0001] The invention relates to a transmission of an automatic transmission, in particular to a planetary transmission with fewer planetary rows, six forwards, one backwards, and four degrees of freedom. Background technique [0002] The development of the transportation industry is changing with each passing day, and the transportation methods such as railway transportation, air transportation, and road transportation are becoming more and more abundant. The road transportation with the most contact in daily life and the widest application range includes truck transportation and passenger vehicle transportation. Facing the increasing demand of the automobile industry, the demand for Automotive technology places higher demands on it. [0003] The engine and transmission of automobiles are the fields that restrict the reform and progress of automobile technology, so the research on these two fields is also the most concentrated topic in the automobile industry...

AI Technical Summary

Problems solved by technology

The existing heavy-duty vehicles mainly use three-degree-of-freedom planetary transmissions. Compared with four-degree-of-freedom planetary transmissions, the power loss is large, the efficiency is low, and the fuel economy is poor, and the existing multi-gear heavy-duty vehicle transmissions mostly have four planets. Rows, the number of planetary rows takes up a lot of space, heavy weight and high cost

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