Loader Hydrostatic Drive System

A hydrostatic drive, loader technology, applied in fluid pressure actuation system components, mechanical equipment, fluid pressure actuation devices, etc., can solve problems such as easy tire slippage, and achieve the effect of preventing wheel slippage

Active Publication Date: 2020-07-21
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 loader hydrostatic drive system, which can solve the problem that the tires are easy to slip during the driving process of the existing loader in which multiple wheels are driven by a torque drive source

Method used

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  • Loader Hydrostatic Drive System

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Embodiment Construction

[0017] The present invention will be described in further detail below in conjunction with accompanying drawing embodiment:

[0018] figure 1 The loader hydrostatic drive system shown includes a hydraulic pump and a hydraulic motor driven by an engine 3, the hydraulic pump is a closed hydraulic pump 4, and the hydraulic motor includes a first hydraulic motor 7 and a second hydraulic motor 8 connected in parallel, The closed hydraulic pump 4 is connected to the first hydraulic motor 7 and the second hydraulic motor 8 to form a closed circuit, and the output shafts of the first hydraulic motor 7 and the second hydraulic motor 8 are respectively connected to the wheel shaft of the loader through the reduction box 9; The closed hydraulic pump 4 includes an oil pump 41, a variable control oil cylinder 42, a shuttle valve 43, a pressure cut-off valve 44 and a pilot proportional valve 45, wherein the variable control oil cylinder 42 controls the swash plate 46 of the oil pump 41 thro...

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Abstract

The invention discloses a loading machine hydrostatic drive system and belongs to the technical field of engineering machinery. The loading machine hydrostatic drive system comprises a hydraulic pumpdriven by an engine. The hydraulic pump is connected with a hydraulic motor to form a closed loop, and the hydraulic pump is a closed type hydraulic pump. The closed type hydraulic pump comprises an oil pump and a variable control oil cylinder which provides pilot oil through an oil supplementing pump and controls the oil pump. An electric proportional overflow valve is arranged between a workingoil opening of the oil pump and a control cavity of the variable control oil cylinder. The control end of the electric proportional overflow valve is connected with an electrical controller with one control end provided with an electric proportional rotary knob. According to the loading machine hydrostatic drive system, the problem that at present, according to a loading machine with a plurality of wheels being driven by a torque driving source, tires are prone to sliding in the driving process can be solved.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a hydrostatic drive system of a loader. Background technique [0002] A loader is a self-propelled earth-moving machine that completes the work through the cooperation of the walking drive system and the working device. Its walking system provides appropriate traction and speed for the loader's operation process. Its walking system often adopts the transmission mode of the hydrostatic drive system. The hydrostatic drive system includes a hydraulic pump driven by the engine. The hydraulic pump is connected to the hydraulic motor to form a closed circuit. 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. connection, wherein the output torque of the hydraulic motor is related to the motor displacement and system pressure; in practica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B11/17F15B13/02F15B21/00
CPCF15B11/17F15B13/02F15B21/00
Inventor 朱泉明周之希付莹罗庆玉石军锋
Owner GUANGXI LIUGONG MASCH CO LTD
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