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Wheeled digging machine gear-reducing control circuit

A control loop and excavator technology, which is applied to mechanically driven excavators/dredgers, earth movers/shovels, construction, etc., and can solve problems such as damage, speeding, and vehicle damage

Inactive Publication Date: 2010-11-17
HEFEI ZHENYU ENG MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will cause catastrophic damage to the bearings of the hydraulic motor, and at the same time cause high pressure in the oil return line of the hydraulic motor, resulting in a "speeding" phenomenon, which often occurs when the current wheeled excavator is driving at high speed, causing serious damage to the vehicle. serious damage

Method used

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  • Wheeled digging machine gear-reducing control circuit
  • Wheeled digging machine gear-reducing control circuit

Examples

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Effect test

Embodiment 1

[0012] See attached figure 1 shown.

[0013] The present invention includes a brake pedal 10, a solenoid valve 4, an accumulator 5 and a three-position six-way reversing valve 1, and the two oil outlets of the three-position six-way reversing valve 1 are connected to a shuttle valve through a hydraulic pipeline The oil inlet ports at both ends of 7, the output port of the shuttle valve 7 is connected to the oil inlet port of a throttle valve 2 through the hydraulic pipeline, and the oil outlet port of the throttle valve 2 is connected to the hydraulic pressure port of the pressure relay 3 through the hydraulic pipeline , the electrical signal output end of the pressure relay 3 is connected with the input end of the solenoid valve 4, and the accumulator 5 is connected with the oil inlet port of the solenoid valve 4 through a hydraulic pipeline. The oil outlets at both ends of the brake pedal 10 are connected to the oil inlet of a brake shuttle valve 6 through the hydraulic pip...

Embodiment 2

[0016] The present invention includes a brake pedal 10, a solenoid valve 4, an accumulator 5 and a three-position six-way reversing valve 1, and the two oil outlets of the three-position six-way reversing valve 1 are connected to a shuttle valve through a hydraulic pipeline The oil inlet ports at both ends of 7, the output port of the shuttle valve 7 is connected to the oil inlet port of a throttle valve 2 through the hydraulic pipeline, and the oil outlet port of the throttle valve 2 is connected to the hydraulic pressure port of the pressure relay 3 through the hydraulic pipeline , the electrical signal output end of the pressure relay 3 is connected with the input end of the solenoid valve 4, and the accumulator 5 is connected with the oil inlet port of the solenoid valve 4 through a hydraulic pipeline.

[0017] The oil source of the shift valve group and the brake valve group is provided by the gear pump. When the excavator is running, the pump continuously fills the accumu...

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Abstract

The invention relates to a wheel excavator shift control loop, which comprises a brake pedal, an electromagnetic valve, an accumulator and a three-position six-way reversing valve, two oil outlets of the three-position six-way reversing valve are connected to two end oil inlets of a shuttle valve through hydraulic pipes, the output port of the shuttle valve is connected to the oil inlet of a flow-saving valve through hydraulic pipes, the oil outlet of the flow-saving valve is connected to a hydraulic port of a pressure relay through hydraulic pipes, the electrical signal output end of the pressure relay is connected to the input end of the electromagnetic valve, the accumulator is connected to the oil inlet of the electromagnetic valve through hydraulic pipes. The excavator of the invention can avoid the vehicle flying phenomenon when braking and shifting in high speed, which effectively prevents the whole device from damages.

Description

technical field [0001] The invention relates to a downshift control system of a motor vehicle, in particular to a downshift control system of a wheeled excavator. Background technique [0002] When the wheeled excavator is driving at high speed, if it brakes or downshifts suddenly, it will cause a "speeding" phenomenon. With the original high speed and passing through the sun gear in the planetary system, the speed of the hydraulic motor is instantly increased several times, that is, the speed of the motor can reach more than 15,000 revolutions in an instant. This will cause catastrophic damage to the bearings of the hydraulic motor, and at the same time cause high pressure in the oil return line of the hydraulic motor, resulting in a "speeding" phenomenon, which often occurs when the current wheeled excavator is driving at high speed, causing serious damage to the vehicle. serious damage. Contents of the invention [0003] Aiming at the deficiencies in the prior art, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02F9/20E02F3/28
Inventor 陈国俊
Owner HEFEI ZHENYU ENG MACHINERY
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