CN2767508Y

CN2767508Y - Hydraulic priority control apparatus for loader-digger

Info

Publication number: CN2767508Y
Application number: CN 200420080962
Authority: CN
Inventors: 高晔; 商飞
Original assignee: Xuzhou Xugong Special Construction Machinery Co Ltd
Current assignee: Xuzhou Xugong Special Construction Machinery Co Ltd
Priority date: 2004-11-03
Filing date: 2004-11-03
Publication date: 2006-03-29
Anticipated expiration: 2014-11-03

Abstract

The utility model relates to hydraulic pilot control apparatus for a digger-loader, which belongs to the field of hydraulic priority control apparatus. A split flow pump supplies oil for a pilot valve; oil outlets at both ends of the pilot valve are respectively connected with a multiple-way valve; the output pressure of the pilot valve is in direct proportion to the displacement of a pilot valve handle and drives the valve core of the multiple-way valve to act; the motion direction and the displacement of the valve core are the same as those of the action of a pilot operating handle so as to control the action of the valve core of the multiple-way valve through controlling the pilot valve handle, realize the control to the digging work device of the digger-loader, and utilize the same hydraulic priority control apparatus to simultaneously control the digging and the loading. The utility model has the advantages of conveniently realized remote control, small operation force, low driver labor intensity, comfort and light operation, sensitive control, favorable proportional control characteristic, combinative actions of a digger, reliable operation and high operation efficiency; the operating handle is designed according to a human-computer principle and is organically combined with the entire disposition of an operator cab so as to be beautiful and harmonious.

Description

Loader-digger hydraulic pilot control device

Technical field

The utility model relates to a kind of hydraulic pilot control device, particularly a kind of loader-digger hydraulic pilot control device.

Background technology

At present, construction machinery products such as excavator or loader, the equipment of this project machinery are all controlled by hydraulic system and are finished, by lever and linkage, by the action of manpower direct pull spool, perhaps by the hydraulic booster device, after the power amplification, by the action of connecting rod pulling spool.Steering force is bigger on the one hand for this maneuverability pattern, be subjected to the linkage arrangement constraints on the other hand, operating efficiency to the complete machine hydraulic system has had great influence like this, and this hydraulic control device can not utilize same hydraulic control device simultaneously to excavating and loading simultaneously and handle.

Summary of the invention

The purpose of this utility model is will provide a kind of can utilize same hydraulic control device to excavating and load the loader-digger hydraulic pilot control device of handling simultaneously.

The purpose of this utility model is achieved in that this guide's control device has a banked direction control valves, the L1 of banked direction control valves is connected with the L2 port is corresponding with the L1 of pilot valve C respectively by pipeline with the L2 port, the L3 of banked direction control valves, L4, L5 and L6 mouth by pipeline respectively with the L3 of pilot valve B, L4, L5 is connected with the L6 port is corresponding, the L7 of banked direction control valves, L8, L9 and L10 port by pipeline respectively with the L7 of pilot valve A, L8, L9 is connected with the L10 port is corresponding, the L11 of banked direction control valves is connected with the L12 port is corresponding with the L11 of pilot valve D respectively by pipeline with the L12 port, the L13 of banked direction control valves is connected with the L14 port is corresponding with the L13 of feet pilot valve respectively with the L14 port, and the T end of pilot valve A is connected by 6 ends of pipeline with oil inlet and oil return piece A; The P end is connected by 2 ends of pipeline with oil inlet and oil return piece B, and the T end of pilot valve B is connected by 7 ends of pipeline with oil inlet and oil return piece A; The P end is connected by 1 end of pipeline with oil inlet and oil return piece B, and the T end of pilot valve C is connected by 5 ends of pipeline with oil inlet and oil return piece A; The P end is connected by 3 ends of pipeline with oil inlet and oil return piece B, and the T end of pilot valve D is connected by 1 end of pipeline with oil inlet and oil return piece A; The P end is connected by 5 ends of pipeline with oil inlet and oil return piece B, and the T end of duplex pump is connected by 4 ends of pipeline with oil inlet and oil return piece A; The P end is connected by 4 ends of pipeline with oil inlet and oil return piece B, and 3 ends of oil inlet and oil return piece A are connected with the T of hydraulic oil container end.

Beneficial effect: owing to adopt such scheme, duplex pump is to the pilot valve fuel feeding, the two ends oil-out of pilot valve is connected with banked direction control valves valve rod two control chamber hydraulic fluid ports respectively, the pilot valve output pressure is directly proportional with the displacement of pilot valve handle, outbound course is identical with handle orientations, this pressure acts on banked direction control valves spool one end, the action of promotion spool, the direction of motion of spool is identical with the action of pilot control handle with displacement, thereby control the action of multichannel spool by handling the pilot valve handle, realization can utilize same hydraulic control device to excavating and loading simultaneously and handle to the control of loader-digger excacation device, has reached the purpose of this utility model.This guide's control device has following advantage: 1, realize far distance controlled easily; 2, steering force little (having only about 10N), driver's labour intensity is low, handles comfortable light; 3; Control is sensitive, and has the good proportion control characteristic; 4, excavating gear action can carry out compound, reliable operation, operating efficiency height; 5, meet the operating grip of people-machine principle design, organically combine coordination attractive in appearance with the driver's cabin integral arrangement.

Description of drawings

Fig. 1 is a structure chart of the present utility model.

1, oil inlet and oil return piece A; 2, pilot valve C; 3, duplex pump; 4, hydraulic oil container; 5, pilot valve B; 6, pilot valve A; 7, pilot valve D; 8, feet pilot valve; 9, banked direction control valves; 10, oil inlet and oil return piece B.

The specific embodiment

Embodiment 1: this guide's control device has a banked direction control valves 9, the L1 of banked direction control valves 9 is connected with the L2 port is corresponding with the L1 of pilot valve C2 respectively by pipeline with the L2 port, the L3 of banked direction control valves 9, L4, L5 and L6 mouth by pipeline respectively with the L3 of pilot valve B5, L4, L5 is connected with the L6 port is corresponding, the L7 of banked direction control valves 9, L8, L9 and L10 port by pipeline respectively with the L7 of pilot valve A6, L8, L9 is connected with the L10 port is corresponding, the L11 of banked direction control valves 9 is connected with the L12 port is corresponding with the L11 of pilot valve D7 respectively by pipeline with the L12 port, the L13 of banked direction control valves 9 is connected with the L14 port is corresponding with the L13 of feet pilot valve 8 respectively with the L14 port, and the T end of pilot valve A6 is connected by 6 ends of pipeline with oil inlet and oil return piece A1; The P end is connected by 2 ends of pipeline with oil inlet and oil return piece B10, and the T end of pilot valve B5 is connected by 7 ends of pipeline with oil inlet and oil return piece A1; The P end is connected by 1 end of pipeline with oil inlet and oil return piece B10, and the T end of pilot valve C2 is connected by 5 ends of pipeline with oil inlet and oil return piece A1; The P end is connected by 3 ends of pipeline with oil inlet and oil return piece B10, and the T end of pilot valve D7 is connected by 1 end of pipeline with oil inlet and oil return piece A1; The P end is connected by 5 ends of pipeline with oil inlet and oil return piece B10, and the T end of duplex pump 3 is connected by 4 ends of pipeline with oil inlet and oil return piece A1; The P end is connected by 4 ends of pipeline with oil inlet and oil return piece B10, and 3 ends of oil inlet and oil return piece A1 are connected with the T of hydraulic oil container 4 end.

Its course of work is: duplex pump 3 is from hydraulic oil container 4 oil suctions, the pressure oil that pumps enters banked direction control valves 9, the pressure oil of discharging enters pressure oil, pilot valve two control mouths are connected with banked direction control valves 9 spool two ends control chambers, and when handling the pilot valve handle, pilot valve output pressure and handle displacement are directly proportional, this pressure promotes the action of banked direction control valves spool, the pressure oil that duplex is made pump flows to hydraulic jack, the device action that pushes the work forward, thus finish the operation of every appointment.

Claims

1, a kind of loader-digger hydraulic pilot control device, it is characterized in that: this guide's control device has a banked direction control valves, the L1 of banked direction control valves is connected with the L2 port is corresponding with the L1 of pilot valve C respectively by pipeline with the L2 port, the L3 of banked direction control valves, L4, L5 and L6 mouth by pipeline respectively with the L3 of pilot valve B, L4, L5 is connected with the L6 port is corresponding, the L7 of banked direction control valves, L8, L9 and L10 port by pipeline respectively with the L7 of pilot valve A, L8, L9 is connected with the L10 port is corresponding, the L11 of banked direction control valves is connected with the L12 port is corresponding with the L11 of pilot valve D respectively by pipeline with the L12 port, the L13 of banked direction control valves is connected with the L14 port is corresponding with the L13 of feet pilot valve respectively with the L14 port, and the T end of pilot valve A is connected by 6 ends of pipeline with oil inlet and oil return piece A; The P end is connected by 2 ends of pipeline with oil inlet and oil return piece B, and the T end of pilot valve B is connected by 7 ends of pipeline with oil inlet and oil return piece A; The P end is connected by 1 end of pipeline with oil inlet and oil return piece B, and the T end of pilot valve C is connected by 5 ends of pipeline with oil inlet and oil return piece A; The P end is connected by 3 ends of pipeline with oil inlet and oil return piece B, and the T end of pilot valve D is connected by 1 end of pipeline with oil inlet and oil return piece A; The P end is connected by 5 ends of pipeline with oil inlet and oil return piece B, and the T end of duplex pump is connected by 4 ends of pipeline with oil inlet and oil return piece A; The P end is connected by 4 ends of pipeline with oil inlet and oil return piece B, and 3 ends of oil inlet and oil return piece A are connected with the T of hydraulic oil container end.