Gyroscopic moment limiting device of hydraulic excavator

A hydraulic excavator and rotary torque technology, which is applied in the direction of earth mover/shovel, construction, etc., can solve the problems of heavy structure, enlarged and thickened structure design, etc., and achieves simple and compact structure, improved work efficiency, and manufacturing cost. low effect

Inactive Publication Date: 2013-10-30
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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Method used

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  • Gyroscopic moment limiting device of hydraulic excavator
  • Gyroscopic moment limiting device of hydraulic excavator
  • Gyroscopic moment limiting device of hydraulic excavator

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Embodiment Construction

[0024] The specific embodiments of the present invention will be described in further detail below, but the embodiments of the present invention are not limited thereto.

[0025] like Figure 4 As shown, the hydraulic excavator swing torque limiting device of the present invention includes an excavator swing hydraulic system, which includes a main control reversing valve 5 , an overload oil supply valve group, a hydraulic motor 1 , and a pilot control valve 6 . The overload oil supply valve group is composed of two check valves 2 and two overload valves 3, the pilot control valve 6 includes two pilot valves, the inlets of the two one-way valves 2 and the two overload valves 3 The outlets of the two check valves 2 are connected together and connected to the oil tank 4. The oil outlets of the two one-way valves 2 are respectively connected to the inlet and outlet main oil circuits of the hydraulic motor 1. The oil inlets of the two overload valves 3 are respectively connected w...

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Abstract

The invention discloses a gyroscopic moment limiting device of a hydraulic excavator. The gyroscopic moment limiting device comprises a two-position four-way hydraulically-controlled reversing valve, an overloading overflow valve, a shuttle valve and two one-way valves. Two oil inlet ports of the shuttle valve are connected onto two outlet ports of a pilot control valve of a gyration hydraulic system respectively. An oil outlet port of the shuttle valve is connected onto a liquid control port of the two-position four-way hydraulically-controlled reversing valve. Outlets of the one-way valves are mutually connected with an inlet of the overloading overflow valve. An oil port P and an oil port O of the two-position four-way hydraulically-controlled reversing valve are connected with an oil inlet and outlet way of a hydraulic motor. An oil port A and an oil port B of the two-position four-way hydraulically-controlled reversing valve are connected with inlet-end oil ways of the one-way valves respectively. An oil tank is connected at the outlet end of the overloading overflow valve. The pressure of the overloading overflow valve is set according to requirements on limitation of braking moment; the technological means of the gyroscopic moment limiting device is simple and convenient to carry out, starting moment can be equal to the braking moment during gyration, gyration braking pressure is reduced during excavation, and horizontal working load is reduced.

Description

technical field [0001] The invention relates to the field of excavation machinery, in particular to a rotary torque limiting device of a hydraulic excavator. Background technique [0002] like figure 1 As shown, the hydraulic excavator is mainly composed of a lower part 1, a turning device 2, an upper turntable 3 and a working device. The working device mainly includes a boom cylinder 4, a boom 5, an arm cylinder 6, an arm 7, a bucket cylinder 8, a bucket 9 and a rocker link mechanism. The hydraulic excavator slewing device adopts hydraulic drive technology. The engine drives the hydraulic pump to provide hydraulic power, and drives the hydraulic motor to drive the upper turntable 3 of the excavator to rotate through the deceleration mechanism. The upper turntable 3 is connected with the working device to drive the working device to rotate. During excavation, the stick cylinder 6 and the bucket cylinder 7 drive the stick 7 and the bucket 8 to move for excavation, the boom...

Claims

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Application Information

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IPC IPC(8): E02F9/22
Inventor 迟永滨冯豪
Owner SOUTH CHINA UNIV OF TECH
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