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Three-stage hydraulic mechanical stepless transmission device for loader

A kind of hydraulic machinery, stepless transmission technology, applied in transmission, fluid transmission, multi-transmission ratio transmission, etc., can solve the problems of complex operation and high power of hydraulic components, so as to improve transmission efficiency, smooth switching, and prolong life. Effect

Active Publication Date: 2018-08-14
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the forward and reverse conversion needs to switch the clutch, and the operation is a little complicated.
[0006] ZF patent US8328676B2 discloses a hydromechanical transmission device for loaders, which uses 2 or 3 hydromechanical sections, adopts the power split form of output split and compound split, and the transmission efficiency Higher, but requires more power from the hydraulic components

Method used

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  • Three-stage hydraulic mechanical stepless transmission device for loader
  • Three-stage hydraulic mechanical stepless transmission device for loader
  • Three-stage hydraulic mechanical stepless transmission device for loader

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Such as figure 1 As shown, the three-stage hydraulic-mechanical stepless transmission device of the loader in this embodiment includes a housing 1, a hydraulic speed regulation circuit, a forward and reverse mechanism, a diversion mechanism, a fixed-axis gear transmission system in the hydraulic section, and a hydraulic mechanical section I. Fixed-axis gear transmission system, hydraulic machinery stage II fixed-axis gear transmission system and output part. The hydraulic speed regulating circuit includes a hydraulic pump 2 , an oil charge pump 3 and a variable motor 28 . The forward and reverse mechanism includes a main input shaft 8 , a fourth gear 4 , a seventh gear 7 , a ninth gear 9 , a tenth gear 10 , a twelfth gear 12 , a first KV clutch 11 and a first KR clutch 6 . The flow-sharing mechanism includes a first planetary carrier 13 , a twenty-third gear 23 , a twenty-first ring gear 21 , a second planetary carrier 16 , a second sun gear 17 and a nineteenth gear 19...

Embodiment 2

[0050] This embodiment is an embodiment improved on the basis of the first embodiment.

[0051] Such as Figure 6As shown, the three-stage hydraulic-mechanical stepless transmission device of the loader in this embodiment includes a housing 1, a hydraulic speed regulation circuit, a forward and reverse mechanism, a diversion mechanism, a fixed-axis gear transmission system in the hydraulic section, and a hydraulic mechanical section I. Fixed-axis gear transmission system, hydraulic machinery stage II fixed-axis gear transmission system and output part. The hydraulic speed regulating circuit includes a hydraulic pump 2 , an oil charge pump 3 and a variable motor 28 . The forward and reverse mechanism includes a main input shaft 8 , a fourth gear 4 , a seventh gear 7 , a ninth gear 9 , a tenth gear 10 , a twelfth gear 12 , a first KV clutch 11 and a first KR clutch 6 . The flow-sharing mechanism includes a first planetary carrier 13 , a twenty-third gear 23 , a twenty-first ri...

Embodiment 3

[0056] This embodiment is an embodiment improved on the basis of the first embodiment.

[0057] Such as Figure 7 As shown, the three-stage hydraulic-mechanical stepless transmission device of the loader in this embodiment includes a housing 1, a hydraulic speed regulation circuit, a forward and reverse mechanism, a diversion mechanism, a fixed-axis gear transmission system in the hydraulic section, and a hydraulic mechanical section I. Fixed-axis gear transmission system, hydraulic machinery stage II fixed-axis gear transmission system and output part. The hydraulic speed regulating circuit includes a hydraulic pump 2 , an oil charge pump 3 and a variable motor 28 . The forward and reverse mechanism includes a main input shaft 8 , a fourth gear 4 , a seventh gear 7 , a ninth gear 9 , a tenth gear 10 , a twelfth gear 12 , a first KV clutch 11 and a first KR clutch 6 . The flow-sharing mechanism includes a first planetary carrier 13 , a twenty-third gear 23 , a twenty-first r...

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Abstract

The invention provides a three-stage hydraulic mechanical composite stepless transmission device. By using the combination of a hydraulic speed regulating circuit and a mechanical circuit, the hydraulic circuit only transmits part of the power, the high transmission efficiency and stepless speed regulation are realized, the transmission efficiency of the transmission device is greatly improved, sothat an engine often works in an economic rotating speed range, and the oil consumption and noise level of a loader are reduced.

Description

technical field [0001] The invention belongs to the technical field of transmission devices, and relates to a stepless transmission device, more precisely, a three-stage hydraulic-mechanical stepless transmission device for a loader. Background technique [0002] At present, construction machinery loaders generally use hydromechanical power shift gearboxes. Due to the needs of loading operations, the vehicle speed and engine load change drastically, and the efficiency of the hydraulic torque converter is low, resulting in a maximum transmission efficiency of about 75%. [0003] The hydrostatic transmission can conveniently realize stepless speed regulation, so that the engine of the loader can always work in the economic speed range, which can improve the energy utilization efficiency of the vehicle; Therefore, compared with the power shift hydromechanical transmission, the improvement potential of the hydrostatic transmission is limited. [0004] Hydromechanical transmissi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H47/04
CPCF16H47/04F16H2047/045F16H2200/2007F16H2702/06
Inventor 彭增雄胡纪滨荆崇波吴维周俊杰魏超
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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