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Multi-mode hydraulic mechanical stepless speed change device for grain harvester

A continuously variable transmission, hydraulic machinery technology

Active Publication Date: 2021-07-16
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing grain harvesters use traditional manual stepped transmissions, shifting gears through sliding gears, shifting gears with meshing sleeves, and shifting gears with synchronizers. Although this kind of transmission is reliable in operation and high in transmission efficiency, it can only be transmitted according to a fixed transmission ratio. The power cannot be continuously changed according to the change of the load, and the increase in gears leads to its bulky size and complex structure, and the driver's manipulation becomes cumbersome, which seriously restricts the improvement of the performance of the grain harvester

Method used

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  • Multi-mode hydraulic mechanical stepless speed change device for grain harvester
  • Multi-mode hydraulic mechanical stepless speed change device for grain harvester
  • Multi-mode hydraulic mechanical stepless speed change device for grain harvester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] The pure hydraulic mode H1 gear of the multi-mode hydraulic-mechanical continuously variable transmission device for grain harvesters: such as figure 2 As shown, the power transmitted from the engine is transmitted to the working device through the power input shaft 1 one way; the other way is through the first gear clutch 4, the first gear 3, the third gear 2, the hydraulic pump input shaft 49, the variable hydraulic pump 50, the quantitative hydraulic motor 48, hydraulic motor output shaft 47, fourth gear clutch 43, fourth gear 46, sixth gear 45, first transmission shaft 44, and seventh gear 36 are transmitted to the ring gear of the second planetary row P2. At this time, the third brake 37 brakes the second planet carrier 35, and the power is output from the second sun gear 12 to the second sun gear shaft 17, and then passes through the fourteenth gear 16, the ninth gear 31, the ninth gear clutch 32, the The second transmission shaft 25 , the tenth gear 30 , the fi...

Embodiment 2

[0087] The purely mechanical mode M4 gear of the multi-mode hydraulic-mechanical continuously variable transmission device for grain harvesters: such as image 3As shown, the power transmitted from the engine is transmitted to the working device through the power input shaft 1 one way; the other way is transmitted to the planetary carrier of the first planetary row P1 through the second gear clutch 5, the second gear 6, and the fifth gear 7 in sequence . At this time, the second brake 10 brakes the first sun gear 9, and the power is output from the first ring gear 8 to the planet carrier of the second planetary row P2. At this time, the fourth brake 14 brakes the second ring gear 13, and the power is output by the second The sun gear 12 is output to the second sun gear shaft 17, and then through the fourteenth gear 16, the ninth gear 31, the ninth gear clutch 32, the second transmission shaft 25, the eleventh gear 28, the sixteenth gear 27, the tenth gear The six-gear clutch ...

Embodiment 3

[0090] The multi-mode hydraulic-mechanical continuously variable transmission device for grain harvesters is used in the hydraulic-mechanical mixed mode HM1 gear of the first planetary row P1 converging without outputting through the second planetary row sun gear: such as Figure 4 As shown, the power transmitted from the engine is transmitted to the working device through the power input shaft 1 in one way; the torque split is realized at the first gear clutch 4 and the second gear clutch 5 in the other way, and the hydraulic circuit passes through the first gear clutch 4 in turn. , the first gear 3, the third gear 2, the hydraulic pump input shaft 49, the variable hydraulic pump 50, the quantitative hydraulic motor 48, the hydraulic motor output shaft 47, the first sun gear shaft clutch 42, and the first sun gear shaft 41 transmitted to the first planet The sun gear of row P1. The mechanical circuit is transmitted to the planetary carrier of the first planetary row P1 throug...

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Abstract

The invention discloses a multi-mode hydraulic mechanical stepless speed change device for a grain harvester. The multi-mode hydraulic mechanical stepless speed change device comprises a power input shaft, a first gear, a second gear, a third gear, a hydraulic variable input shaft, a quantitative hydraulic motor, a hydraulic motor output shaft, a first planet row and a second planet row, wherein one end of the power input shaft is in transmission connection with an engine, and the other end of the power input shaft is connected with a power takeoff; the first gear is selectively connected with the power input shaft; the second gear is selectively connected with the power input shaft; the third gear is meshed with the first gear; one end of the hydraulic variable input shaft is coaxially and fixedly connected with the third gear, and the other end of the hydraulic variable input shaft is connected with a variable hydraulic pump; the quantitative hydraulic motor is connected with the variable hydraulic pump; the hydraulic motor output shaft is connected to the hydraulic motor; a second planet carrier is fixedly connected with a first gear ring; the second gear is in transmission connection with a first planet carrier; the hydraulic motor output shaft selectively transmits power to a first sun gear or a second gear ring; and a second sun gear or the second planet carrier is selectively connected with different gear execution mechanisms, and transmits power to the power output shaft through the gear execution mechanisms.

Description

technical field [0001] The invention belongs to the technical field of speed change devices for grain harvesters, in particular to a multi-mode hydraulic mechanical stepless speed change device for grain harvesters. Background technique [0002] The self-propelled grain combine harvester has complex working conditions and a large load fluctuation range, so it has high requirements for the speed adjustment range, torque, transmission efficiency and power continuity of the transmission. Most of the existing grain harvesters use traditional manual stepped transmissions, shifting gears through sliding gears, shifting gears with meshing sleeves, and shifting gears with synchronizers. Although this kind of transmission is reliable in operation and high in transmission efficiency, it can only be transmitted according to a fixed transmission ratio. The power cannot be continuously shifted according to the change of the load, and the increase in gears leads to its bulky size and comp...

Claims

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Application Information

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IPC IPC(8): F16H47/04
CPCF16H47/04F16H2047/045
Inventor 孙少华田哲陈浩刘翔宇公茂森程子硕王英睿
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)