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Multi-planet-wheel transmission mechanism

A technology of transmission mechanism and planetary gear, which is applied in the direction of gear transmission, transmission, transmission parts, etc., can solve the problems of insignificant effect of the weight of the gearbox, limit the transmission ratio of the planetary gear train, reduce the weight of the gearbox, etc., to achieve The effect of compact structure, increased transmission ratio, and increased uniformity

Inactive Publication Date: 2017-06-20
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the transmission power of the gearbox increases, this 3-split planetary gear train has no obvious effect on reducing the weight of the gearbox. It is necessary to adopt a planetary gear design with more split numbers to make the power density transmitted by the planetary gear train higher. , thereby reducing the weight of the gearbox
The main reasons for using the 3-split planetary gear transmission at present: First, the planetary carrier adopts a double-spoke design, and some space in the circumferential direction is used to connect the two spoke plates, and the number of planetary gears is limited by this part of the space; second, When the transmission ratio of the planetary gear train is relatively large, the planetary gears are relatively large and will interfere in the circumferential direction, so more planetary gears cannot be placed
Similarly, in the design of a 3-split or multi-split planetary gear train, if the sun gear is too small, it will cause interference between the planetary gears, which limits the transmission ratio of the planetary gear train

Method used

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Examples

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Embodiment 1

[0038] see figure 1 and figure 2 , the multi-planet gear transmission mechanism of the embodiment of the present invention comprises sun gear 5, planetary carrier 3, ring gear 4 and 4 planetary gear sets, and planetary gear set is made up of two gears (first gear 11 and second gear 12), The first gear 11 and the second gear 12 are mounted on the planet carrier 3 and can rotate freely relative to the planet carrier 3. The first gear 11 meshes with the ring gear 4 and the second gear 12 respectively, and the second gear 12 meshes with the sun gear 5 respectively. Mesh with the first gear 11. The number of teeth of the sun gear 5 is z s , the number of teeth of ring gear 4 is z r , the number of teeth of the first gear 11 is z p1 , the number of teeth of the second gear 12 is z p2 , figure 1 The number of teeth of the first gear 11 and the second gear 12 is greater than the number of teeth of the original planetary gear, figure 2 The sum of the number of teeth of the fir...

Embodiment 2

[0049] see image 3 , the multi-planet gear transmission mechanism of the embodiment of the present invention comprises sun gear 5, ring gear 4, planetary carrier 3 and 4 planetary gear sets, and planetary gear set consists of 3 gears (the first gear 11, the second gear 12 and the first gear Three gears 13) are composed of three gears mounted on the planet carrier 3 and can rotate freely relative to the planet carrier 3. The first gear 11 meshes with the ring gear 4 and the second gear 12 respectively, and the second gear 12 meshes with the first gear respectively. 11. The third gear 13 meshes, and the third gear 3 meshes with the sun gear 5 and the second gear 12 respectively. The number of teeth of the sun gear 5 is z s , the number of teeth of ring gear 4 is z r , the number of teeth of the first gear 11 is z p1 , the number of teeth of the second gear 12 is z p2 , the number of teeth of the third gear 13 is z p3 , the sum of the number of teeth of the first gear 11, t...

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Abstract

The invention discloses a multi-planet-wheel transmission mechanism which comprises a sun gear, a gear ring and a planet carrier and further comprises a plurality of planet wheel sets, wherein each planet wheel set comprises at least two gears; the gears are all mounted on the planet carrier and can rotate relative to the planet carrier; and two ends of each planet wheel set are meshed with the sun gear and the gear ring. According to the embodiment of the invention, a planet wheel is replaced by a planet wheel set formed by a plurality of small gears to increase the split flow number of a planetary gear train to further increase the power density of the planetary gear train; and in addition, as the small planet wheels are unlikely to intervene in the peripheral direction, the teeth number of the sun gear can be further reduced to increase the transmission ratio of the planetary gear train.

Description

technical field [0001] The invention relates to the technical field of gear transmission, in particular to a multi-planet gear transmission mechanism. Background technique [0002] Planetary gear transmission has the characteristics of large transmission ratio and small size, and has been applied in important industrial sectors such as wind power, metallurgy, and military industry. Especially in the wind power industry, basically 80% of wind power speed-up gearboxes use planetary gear transmission. With the development of wind power generation technology, the power transmitted by the wind power gearbox is also increasing, which puts forward higher requirements on the reliability and weight of the gearbox. [0003] The planetary gear train currently used in wind power gearboxes basically adopts a 3-split planetary transmission structure. This structure can make the load evenly distributed among the 3 planetary gears when the sun gear is floating. However, as the transmission...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H1/32F16H57/08G06F17/50
CPCF16H1/32F16H57/08G06F30/17
Inventor 向东蒋李沈银华牟鹏武士祺李艳韦尧中
Owner TSINGHUA UNIV
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