Four-gear speed change mechanism
A technology for four-speed transmission and transmission components, which is applied to vehicle gearboxes, mechanical equipment, gear transmissions, etc., can solve cumbersome and complicated problems, and achieve the effects of reasonable step ratio selection, weight reduction, and reduced number of parts
Active Publication Date: 2020-06-19
CHINA NORTH VEHICLE RES INST
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Problems solved by technology
The efficiency, size and reliability of the planetary transmission mechanism depend largely on the transmission diagram, and the optimization of the transmission diagram scheme is a complicated and tedious task
Method used
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Embodiment 1
[0053] This example figure 1 As shown, the provided planetary transmission mechanism is suitable for automatic transmissions of vehicles powered by engines or electric motors. The two planetary rows are arranged in order, and the planetary rows are connected by a shared planetary frame and a transmission member, and the input shaft is connected with the input member ①, and the power output by the power source is transmitted to the planetary transmission mechanism. The output shaft is connected to the output member ②, and the power is transmitted to the front and rear axles or the left and right drive wheels through the transfer case or differential. For the electric hub electric drive system, the power transmitted by the automatic transmission is directly transmitted to the wheels.
[0054] Specifically, as figure 1 As shown, the specific solution of the planetary transmission provided by this embodiment includes two planetary rows, four operating elements, and two transmissi...
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The invention belongs to the technical field of mechanical design, and particularly relates to a four-gear speed change mechanism. The mechanism can be used for an automatic gearbox. In order to provide the four-gear speed change mechanism which is compact in structure, small in size, large in reduction ratio and high in power density for the automatic gearbox, the speed change mechanism is provided with two planet rows, four operating parts and two transmission components, wherein the first planet row is a simple planet row and comprises a row of gear rings R1, a row of planet carriers CA1 and a row of sun gears S1, and the second planet row is a common planet row and comprises the planet carriers CA1 shared by the first planet row, two rows of sun gears S2 and a sun gear S3. The mechanism has the advantages that the number of parts of the gearbox is reduced, the size of the gearbox is reduced, and the weight of the gearbox is reduced, so that the manufacturing cost is reduced; the four gears are switched according to different driving working conditions; the speed change mechanism is reasonable in order ratio selection, and automatic gear shifting of an automatic transmission isfacilitated; and compared with similar speed change mechanisms, the planetary speed change mechanism is excellent in performance and is at the domestic leading level.
Description
technical field [0001] The invention belongs to the technical field of mechanical design, and in particular relates to a four-speed transmission mechanism, which can be used in automatic transmissions. Background technique [0002] The development trend of the transmission device is mainly focused on high speed, high efficiency, high reliability and low power density. The volume and weight of the gearbox and internal components are the bottlenecks restricting the improvement of power density. Compared with fixed shaft transmission, planetary transmission has the advantages of compact structure and small volume, and a reasonable design can obtain a large reduction ratio, so it is widely used in various transmissions. The efficiency, size and reliability of a planetary transmission mechanism largely depend on the transmission diagram, and the optimization of the transmission diagram scheme is a complex and cumbersome work. Therefore, it is necessary to propose a new type of m...
Claims
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IPC IPC(8): F16H3/62
CPCF16H3/62F16H2200/0043F16H2200/201F16H2200/2041
Inventor 李慎龙唐沛邢庆坤贾爽张静张鹤尹华兵李新毅周如意
Owner CHINA NORTH VEHICLE RES INST