Three-speed transmission and three-speed electric assembly
A transmission and three-speed technology, which is applied in the field of automobile transmission, can solve the problems of high cost and complex structure of three-speed transmission, and achieve the effects of improving service life, reasonable level difference and reducing noise
Active Publication Date: 2020-10-23
BYD CO LTD
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Problems solved by technology
[0005] The technical problem to be solved by the present invention is to provide a planetary mechanism, a three-speed transmission and a three-speed electric assembly for the existing three-speed transmission with complex structure and high cost
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[0047] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0048] Such as figure 1 As shown, the three-speed electric assembly provided by an embodiment of the present invention includes a motor 2, a differential (not shown in the figure) and a three-speed transmission.
[0049] In this embodiment, the three-speed transmission includes a case (not shown in the figure), an input shaft 1, a first countershaft 11, a second countershaft 17, a planetary gear mechanism, a first-speed driving gear 7, a first-speed slave Driving gear 9, second gear driving gear 8, second gear driven gear 10, third gear driving gear 15, third gear drive...
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The invention provides a planet mechanism, a three-gear transmission and a three-gear electric assembly. The planet mechanism comprises an input shaft and a planet gear mechanism; the planet gear mechanism comprises a sun gear, a planet carrier and a gear ring; the sun gear is in outer engaged transmission with a planet gear of the planet carrier; the planet gear on the planet carrier is in innerengaged transmission with the gear ring; the sun gear is fixedly connected to the back end of the input shaft; the front end of the input shaft is radially limited in a box body; the back end of the input end is suspended; the gear ring is fixedly connected to the box body; and the planet carrier is rotationally supported on the box body. When the planet mechanism works, and the planet gear is loaded in an unbalanced mode, the suspended back end of the input shaft (and the sun gear) can be floated to automatically search a balance position unit the load among all planet gears is uniformly distributed. An additional load homogenizing device is not added, so that he planet mechanism is simple in structure and low in cost.
Description
technical field [0001] The invention belongs to the technical field of automobile transmission, and in particular relates to a planetary mechanism, a three-speed transmission and a three-speed electric assembly. Background technique [0002] The planetary gear mechanism has the characteristics of large transmission ratio, small size, stable operation and large carrying capacity. By using the planetary gear mechanism, different speed ratio requirements can be realized in a limited space. For example, using a planetary gear structure, a three-speed transmission with compact space and simple structure can be obtained. [0003] In an existing three-speed transmission, the input shaft is connected to the sun gear, and the front and rear ends of the input shaft are rotatably supported on the casing by bearings. Like this, the front and rear ends of the input shaft are all radially limited by the bearings. [0004] When the existing three-speed transmission is working, the planet...
Claims
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IPC IPC(8): F16H3/52F16H57/023F16H57/037
CPCF16H3/52F16H57/023F16H57/037
Inventor 李冬冬汤秋彬
Owner BYD CO LTD