Loader closed type static hydraulic driving system

A hydrostatic drive, loader technology, applied in mechanical equipment, fluid pressure actuation devices, servo motors, etc., can solve the problem of wheels falling to a safe value, and achieve the effect of ensuring safety

Active Publication Date: 2018-09-14
GUANGXI LIUGONG MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a closed hydrostatic drive system of a loader, which can solve the problem that once the pipeline is broken in the existing closed hydrostatic drive system of the loader, manual operation of the service brake cannot stop the stalled and rotating wheels at an appropriate time. The problem of falling within the safe value

Method used

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  • Loader closed type static hydraulic driving system

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Embodiment Construction

[0018] The present invention will be described in further detail below in conjunction with accompanying drawing embodiment:

[0019] figure 1 The closed hydrostatic drive system of the loader shown includes a closed pipeline formed by connecting the hydraulic pump 1 and the hydraulic motor 2. The hydraulic pump 1 is a one-way rotating two-way variable-displacement pump; Displacement motor; between the hydraulic pump 1 and the hydraulic motor 2, there is an oil charge valve group 4 and an anti-rupture valve group 6 in sequence, and the oil charge valve group 4 is connected with the fuel tank 5 through the oil charge pump 3; the anti-rupture valve group 6 includes a The shuttle valve 65 obtains the control high pressure in the system, and is controlled by the hydraulic control valve to open or close the two-way cartridge valve; wherein the two-way cartridge valve includes the first two-way cartridge valve 61 and the second two-way cartridge valve 62; the hydraulic control valve...

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Abstract

The invention discloses a loader closed type static hydraulic driving system and belongs to the technical field of engineering machinery. The system comprises a hydraulic pump and a closed pipeline, wherein the closed pipeline is formed by communicating with a hydraulic motor. An anti-rupture valve bank is arranged between the hydraulic pump and the hydraulic motor. The anti-rupture valve bank comprises two-way cartridge valves, wherein the two-way cartridge valves obtain the high pressure inside the system through a shuttle valve and are controlled by hydraulic valves to be switched on or switched off. By means of the loader closed type static hydraulic driving system, the problem that when an existing loader closed type static hydraulic driving system is used, once a pipeline is ruptured, vehicle wheels which stall and rotate cannot be dropped within the safe value range in proper time through travelling brake operated manually can be solved.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a closed hydrostatic drive system for a loader. Background technique [0002] Loader is a kind of earthwork construction machinery widely used in construction projects such as roads, railways, buildings, hydropower, ports, mines, etc. Existing loaders often use a closed hydrostatic drive system, which includes an engine-driven Hydraulic pump, the hydraulic pump is connected with the hydraulic motor to form a closed pipeline, the output of the hydraulic motor is connected to the wheel through the gearbox, the drive axle, or the hydraulic motor shaft is directly connected to the wheel shaft of the loader wheel. In practical applications, due to the hydraulic The work of the system will generate heat, the maximum working temperature is between 80-100°C, and the loader travels under harsh conditions, the maximum working pressure in the system is between 40-50Mpa, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B11/00F15B13/02
Inventor 朱泉明温玉洁赵丽丽
Owner GUANGXI LIUGONG MASCH CO LTD
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