Hydraulic system of wheeled tractor

A wheeled tractor and hydraulic system technology, applied in the field of tractors, can solve problems such as hydraulic system stuck valve, hydraulic system functional requirements, faults, etc., and achieve the effects of reducing the probability of stuck valve, rigorous structure, and reducing sensitivity

Inactive Publication Date: 2015-04-29
FIRST TRACTOR
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Problems solved by technology

[0002] At present, on the existing large and medium-power wheeled tractors, most of the oil used in the hydraulic system comes from the transmission system. Due to the limitation of the existing technological level, the cleanliness of the oil in the transmission system often cannot meet the functional requirements of the hydraulic system. It is easy to cause failures such as valve stuck in the hydraulic system

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  • Hydraulic system of wheeled tractor
  • Hydraulic system of wheeled tractor
  • Hydraulic system of wheeled tractor

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with the accompanying drawings. Such as Figure 1~4 As shown, a hydraulic system for a wheeled tractor mainly includes a double-barrel oil filter 1, a gear pump 2, a priority valve 3, a distributor 4, and a hydraulic output valve plate 5; it is characterized in that: the double-barrel oil filter 1 is fixed on the side of the transmission case 7 through the fixing bracket 6 and bolts; the gear pump 2 is fixed on the side of the gear chamber 8 of the engine positive chamber through bolts; the priority valve 3 is fixed on the fixing bracket 6 through bolts; the distributor 4 is fixed on the On the lifter housing 9; the hydraulic output valve plate 5 is fixed on the multi-way valve bracket 10 by bolts. The duplex oil filter 1, the gear pump 2, the priority valve 3, the distributor 4, and the hydraulic output valve plate 5 are connected through pipelines.

[0012] The upper outlet A of the duplex oil filt...

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Abstract

A hydraulic system of a wheeled tractor comprises a double-tube oil filter, a gear pump, a priority valve, a distributor and a hydraulic output valve plate, wherein the double-tube oil filter is fixed on one side of a transmission case through a fixing support and a bolt, the gear pump is fixed on one side of an engine timing gear housing through a bolt, the priority valve is fixed on the fixing support through a bolt, the distributor is fixed on a lifter shell through a bolt, the hydraulic output valve plate is fixed on a multi-way valve support through a bolt, and the double-tube oil filter, the gear pump, the priority valve and the hydraulic output valve plate are connected through pipelines. The hydraulic system of the wheeled tractor has the advantages that operating states of operating devices for hydraulic lifting, hydraulic output and the like are achieved through functions of the priority valve; when the hydraulic lifting device is not in operation, a great quantity of lubricating oil directly flows into a pump inlet through the hydraulic output valve plate via an oil-return oil filter in the double-tube oil filter to enter small circulation; sensitivity of the hydraulic system on oil liquid cleanliness is weakened; valve jamming probability of the hydraulic system is decreased, and accordingly, the whole hydraulic system is precise and meticulous in structure.

Description

technical field [0001] The invention belongs to the field of tractors and relates to a wheeled tractor hydraulic system. Background technique [0002] At present, on the existing large and medium-power wheeled tractors, most of the oil used in the hydraulic system comes from the transmission system. Due to the limitation of the existing technological level, the cleanliness of the oil in the transmission system often cannot meet the functional requirements of the hydraulic system. It is easy to cause failures such as stuck valves in the hydraulic system. Therefore, through the rearrangement of the hydraulic components of the hydraulic system and the improvement of components, the series oil circuit of the hydraulic output valve plate and the distributor in the existing hydraulic system can be changed to the parallel oil circuit through the special priority valve, and the duplex filter can be added. Changing the connection mode of the oil circuit can greatly reduce the sensit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B21/04F15B11/024
CPCF15B21/041F15B11/024F15B2211/615
Inventor 刘涛罗明泉张凯雷蕾师二产
Owner FIRST TRACTOR
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