CN104179738B - A kind of sliding loader open type hydraulic system - Google Patents

A kind of sliding loader open type hydraulic system Download PDF

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Publication number
CN104179738B
CN104179738B CN201410386350.6A CN201410386350A CN104179738B CN 104179738 B CN104179738 B CN 104179738B CN 201410386350 A CN201410386350 A CN 201410386350A CN 104179738 B CN104179738 B CN 104179738B
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China
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hydraulic fluid
fluid port
valve
pilot valve
oil
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CN104179738A (en
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邱德波
陈超
余红波
白永刚
马宗宇
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Long Gong (shanghai) Precision Hydraulic Co Ltd
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Long Gong (shanghai) Precision Hydraulic Co Ltd
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Abstract

The invention discloses a kind of sliding loader entire variable open type hydraulic system, it is characterized in that, comprise by axial variable plunger pump as dynamical element, load sensing multi-way valve is as control unit, the working connection system that boom cylinder, rotary ink tank, accessory interface, left running motor, right running motor form as executive component, guide's oil-way system that oil sources valve, left pilot valve, right pilot valve, accessory pilot valve form as pilot control element and the auxiliary oil way system that fuel tank consists of pipeline.The present invention adopts axial variable plunger pump, improves system for assignment of traffic during shortage of oil, to obtain the load-sensitive flow control irrelevant with induced pressure, ensures sliding loader accuracy of action; Travelling control hydraulic system and machining device hydraulic system share a variable displacement pump, variable displacement pump and directly finish from fuel tank oil suction, oil hydraulic motor the open system that merit oil return directly enters fuel tank, improve closed system because leaking the high heat of fluid loss and the system high pressure generation caused.

Description

A kind of sliding loader open type hydraulic system
Technical field
The present invention relates to a kind of hydraulic system of sliding loader, be specifically related to a kind of sliding loader entire variable open type hydraulic system.
Background technique
Sliding loader is a kind of small-size multifunction engineering machinery, there is good mobility, flexibility, can quick-replaceable be needed according to operation or mount multiple equipment, be widely used in that Active workings is narrow and small, the not gentle equipment of surface relief converts occasion frequently.Sliding loader hydraulic system is the medium tache connecting load and motor, it is power chain engine output finally being passed to operation mechanism, whether its design of Hydraulic System is reasonable, has very important impact to the load in sliding loader operation process, speed and other control.
Current sliding loader hydraulic system is made up of two-part, be respectively machining device hydraulic system and travelling control hydraulic system, machining device hydraulic system exports fluid by quantitative gear pump, and drive oil cylinder acting by multi-way valve, oil return directly accesses the quantitative open type hydraulic system of fuel tank; Travelling control hydraulic system adopts variable displacement pump output hydraulic pressure oil, Direct driver oil hydraulic motor, and oil hydraulic motor to finish after merit oil return to the variable closed type hydraulic system of the low pressure inlet port of oil hydraulic pump.Sliding loader machining device hydraulic system is owing to adopting metering pump, some hydraulic oil total is through relief valve overflow, not only waste energy, system also can be caused to generate heat, simultaneously due to the manipulating object of sliding loader and operating mode ever-changing, the load suffered by each equipment and operating oil pressure are also different, therefore, often occur that the equipment of underload " seizes " phenomenon of the hydraulic fluid flow rate of heavy load equipment, cause composite move to be difficult to realize.Sliding loader travelling control hydraulic system is owing to adopting closed type hydraulic system, and variable displacement pump and oil hydraulic motor, owing to letting out in self, can cause system to inhale empty fault; In addition, because of system this as closed circuit, the fluid of leakage is not enough to take away the high heat that system high pressure produces, and thus makes system temperature raise, and reduces hydraulic components working life.In recent years, although domestic existing manufacturer starts the sliding loader producing assembling walking closed type hydraulic system, but the defect existed because of system itself and key components and parts complex structure thereof, still monopolize supply by external producer at present, in market competition, bring unfavorable factor to product, thus compatriots are badly in need of developing the sliding loader hydraulic system with independent intellectual property right.
Summary of the invention
To be solved by this invention is that existing sliding loader closed type hydraulic system easily occurs that the equipment of underload " seizes " phenomenon of the hydraulic fluid flow rate of heavy load equipment, causes composite move to be difficult to realize; Variable displacement pump and oil hydraulic motor, owing to letting out in self, can cause system to inhale empty fault; In addition, because system is originally as closed circuit, the fluid of leakage is not enough to the high heat taking away system high pressure generation, thus makes system temperature raise, reduces the technical problem in hydraulic components working life.
In order to solve the problem, the invention provides a kind of sliding loader entire variable open type hydraulic system, it is characterized in that, comprise by axial variable plunger pump as dynamical element, load sensing multi-way valve is as control unit, the working connection system that boom cylinder, rotary ink tank, accessory interface, left running motor, right running motor form as executive component, guide's oil-way system that oil sources valve, left pilot valve, right pilot valve, accessory pilot valve form as pilot control element and the auxiliary oil way system that fuel tank consists of pipeline;
The inlet port of described axial variable plunger pump is connected with fuel tank by pipeline; Axial variable plunger pump oil outlet connects load sensing multi-way valve filler opening and oil sources valve filler opening respectively; Oil sources valve oil outlet is connected with left pilot valve filler opening, right pilot valve filler opening, accessory pilot valve filler opening respectively by pipeline manifold block; Oil sources valve return opening is connected with left pilot valve return opening, right pilot valve return opening, accessory pilot valve return opening on the one hand respectively by pipeline manifold block, is connected on the other hand with fuel tank;
Be provided with swing arm connection, rotating bucket connection, accessory connection in described load sensing multi-way valve, left lateral walks connection and right lateral walks connection; Swing arm connection hydraulic fluid port one, hydraulic fluid port two are connected with boom cylinder hydraulic fluid port one, hydraulic fluid port two respectively; Rotating bucket connection hydraulic fluid port one, hydraulic fluid port two are connected with rotary ink tank hydraulic fluid port one, hydraulic fluid port two respectively; Accessory connection hydraulic fluid port one, hydraulic fluid port two are connected with accessory interface hydraulic fluid port one, hydraulic fluid port two hydraulic fluid port, form machining device hydraulic system; Left lateral walks to join hydraulic fluid port one, hydraulic fluid port two is connected with left running motor hydraulic fluid port one, hydraulic fluid port two; Right lateral walks to join hydraulic fluid port one, hydraulic fluid port two is connected with right running motor hydraulic fluid port one, hydraulic fluid port two; Fill valve and load sensing multi-way valve connect and compose travelling control hydraulic system, and Fill valve filler opening is connected with load sensing multi-way valve return opening; Load sensing multi-way valve return opening is connected with system fuel tank; The load feedback signal mouth of load sensing multi-way valve is connected with axial variable plunger pump load feedback signal mouth;
The oil outlet one of described left pilot valve, oil outlet two, oil outlet three, oil outlet four walk to join pilot valve hydraulic fluid port one respectively with the left lateral of load sensing multi-way valve, hydraulic fluid port two, hydraulic fluid port three, hydraulic fluid port four are connected, and control left running motor respectively, right running motor advances, retreat; Left pilot valve return opening is connected with pipeline manifold block return opening;
Oil outlet one, oil outlet two, the oil outlet three of described right pilot valve, oil outlet four joins pilot valve hydraulic fluid port one, hydraulic fluid port two respectively with the swing arm of load sensing multi-way valve, rotating bucket joins pilot valve hydraulic fluid port one, hydraulic fluid port two is connected, and accessory pilot valve oil outlet one, oil outlet two joins pilot valve hydraulic fluid port one with the accessory of load sensing multi-way valve respectively, hydraulic fluid port two is connected; The return opening of right pilot valve, accessory pilot valve is all connected with the return opening of pipeline manifold block.
Preferably, the reduction valve for reducing pressure to the high pressure oil from axial variable plunger pump oil outlet is provided with in described oil sources valve.
Preferably, filter one is provided with in described fuel tank and between pipeline connecting end.
Preferably, be provided with filter three between described axial variable plunger pump and oil sources valve, axial variable plunger pump oil outlet is connected with filter three filler opening, and filter three oil outlet is connected with oil sources valve filler opening.
Preferably, one-way valve, radiator, filter two is provided with successively between described load sensing multi-way valve return opening and fuel tank.
Compared with prior art, the invention has the advantages that:
(1) energy-conservation, in native system, variable displacement pump can regulate according to the discharge capacity of the size of load to self, and oil hydraulic pump output power and load are adapted, and improves power utilization, reduces energy loss;
(2) lower the temperature, native system is owing to adopting open type hydraulic system, and the hydraulic oil after acting directly gets back to fuel tank, and the high heat that system can be made to produce is lowered rapidly, extends hydraulic components working life;
(3) reduce costs, the crucial hydraulic components that native system adopts is domestic manufacturer's independent research, and price comparatively import parts is cheaply a lot, and Reliability comparotive is high, greatly can improve the competitiveness of product in market, thus native system is a kind of hydraulic system that can be widely used in sliding loader.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of sliding loader open type hydraulic system provided by the invention.
In figure:
1 axial variable plunger pump;
2 load sensing multi-way valves;
2-1 swing arm joins;
2-2 rotating bucket joins;
2-3 accessory joins;
2-4 left lateral walks connection;
2-5 right lateral walks connection;
3 boom cylinders;
4 rotary ink tanks;
5 accessory interfaces;
6 left running motors;
7 right running motors;
8 oil sources valves;
9 left pilot valves;
10 right pilot valves;
11 accessory pilot valves;
12 fuel tanks;
13 filters one;
14 filters two
15 filters three;
16 radiators;
17 Fill valves;
18 pipeline manifold blocks;
19 one-way valves;
21 axial variable plunger pump inlet ports;
22 axial variable plunger pump oil outlets;
23 load sensing multi-way valve filler openings;
24 filter three filler openings;
25 Fill valve filler openings;
26 load sensing multi-way valve return openings;
27 axial variable plunger pump load feedback signal mouths;
28 load sensing multi-way valve load feedback signal mouths;
29 filter three oil outlets;
30 oil sources valve filler openings;
31 oil sources valve oil outlets;
32 oil sources valve return openings;
33 left pilot valve filler openings;
34 right pilot valve filler openings;
35 left pilot valve return openings;
36 right pilot valve return openings;
37 accessory pilot valve return openings;
A1 swing arm connection hydraulic fluid port one;
B1 swing arm connection hydraulic fluid port two;
A1 ' boom cylinder hydraulic fluid port one;
B1 ' boom cylinder hydraulic fluid port two;
A2 rotating bucket connection hydraulic fluid port one
B2 rotating bucket connection hydraulic fluid port two;
A2 ' rotary ink tank hydraulic fluid port one;
B2 ' rotary ink tank hydraulic fluid port two;
A3 accessory connection hydraulic fluid port one;
B3 accessory connection hydraulic fluid port two;
A3 ' accessory interface hydraulic fluid port one;
B3 ' accessory interface hydraulic fluid port two;
A4 left lateral walks to join hydraulic fluid port one;
B4 left lateral walks to join hydraulic fluid port two;
The left running motor hydraulic fluid port one of A4 ';
The left running motor hydraulic fluid port two of B4 ';
A5 right lateral walks to join hydraulic fluid port one;
B5 right lateral walks to join hydraulic fluid port two;
The right running motor hydraulic fluid port one of A5 ';
The right running motor hydraulic fluid port two of B5 ';
The right pilot valve oil outlet one of a1;
The right pilot valve oil outlet two of b1;
The right pilot valve oil outlet three of a2;
The right pilot valve oil outlet four of b2;
A3 accessory pilot valve oil outlet one;
B3 accessory pilot valve oil outlet two;
The left pilot valve oil outlet one of a4;
The left pilot valve oil outlet two of b4;
The left pilot valve oil outlet three of a5;
The left pilot valve oil outlet four of b5;
A1 ' swing arm connection pilot valve hydraulic fluid port one;
B1 ' swing arm connection pilot valve hydraulic fluid port two;
A2 ' rotating bucket connection pilot valve hydraulic fluid port one;
B2 ' rotating bucket connection pilot valve hydraulic fluid port two;
A3 ' accessory connection pilot valve hydraulic fluid port one;
B3 ' accessory connection pilot valve hydraulic fluid port two;
A4 ' left lateral walks to join pilot valve hydraulic fluid port one;
B4 ' left lateral walks to join pilot valve hydraulic fluid port two;
A5 ' left lateral walks to join pilot valve hydraulic fluid port three;
B5 ' left lateral walks to join pilot valve hydraulic fluid port four.
Embodiment
For making the present invention become apparent, hereby with preferred embodiment, and accompanying drawing is coordinated to be described in detail below.
Embodiment
As shown in Figure 1, for the structural representation of a kind of sliding loader entire variable open type hydraulic system provided by the invention, comprise by axial variable plunger pump 1 as dynamical element, load sensing multi-way valve 2 is as control unit, the working connection system that boom cylinder 3, rotary ink tank 4, accessory interface 5, left running motor 6, right running motor 7 form as executive component, guide's oil-way system that oil sources valve 8, left pilot valve 9, right pilot valve 10, accessory pilot valve 11 form as pilot control element and the auxiliary oil way system that fuel tank 12 consists of pipeline.
The inlet port 21 of axial variable plunger pump 1 is connected with fuel tank 12 by pipeline; Axial variable plunger pump oil outlet 22 connects load sensing multi-way valve filler opening 23 and oil sources valve filler opening 30 respectively.Access a filter 3 15 between axial variable plunger pump 1 and oil sources valve 8, axial variable plunger pump oil outlet 22 is connected with filter three filler opening 24, and filter three oil outlet 29 is connected with oil sources valve filler opening 30.Oil sources valve oil outlet 31 is connected with left pilot valve filler opening 33, right pilot valve filler opening 34, accessory pilot valve filler opening respectively by pipeline manifold block 18; Oil sources valve return opening 32 is connected with left pilot valve return opening 35, right pilot valve return opening 36, accessory pilot valve return opening 37 respectively by pipeline manifold block 18 1 aspect, is connected on the other hand with fuel tank 12.A reduction valve for reducing pressure to the high pressure oil from axial variable plunger pump oil outlet 22 is installed in oil sources valve 8.
Be provided with swing arm connection 2-1, rotating bucket connection 2-2, accessory connection 2-3 in load sensing multi-way valve 2, left lateral walks to join 2-4 and right lateral is walked to join 2-5; Swing arm connection hydraulic fluid port one A1, hydraulic fluid port two B1 are connected with boom cylinder hydraulic fluid port one A1 ', hydraulic fluid port two B1 ' respectively; Rotating bucket connection hydraulic fluid port one A2, hydraulic fluid port two B2 are connected with rotary ink tank hydraulic fluid port one A2 ', hydraulic fluid port two B2 ' respectively; Accessory connection hydraulic fluid port one A3, hydraulic fluid port two B3 are connected with accessory interface hydraulic fluid port one A3 ', hydraulic fluid port two B3 ' hydraulic fluid port, form machining device hydraulic system; Left lateral is walked to join hydraulic fluid port one A4, hydraulic fluid port two B4 and is connected with left running motor hydraulic fluid port one A4 ', hydraulic fluid port two B4 '; Right lateral is walked to join hydraulic fluid port one A5, hydraulic fluid port two B5 and is connected with right running motor hydraulic fluid port one A5 ', hydraulic fluid port two B5 '; Fill valve 17 and load sensing multi-way valve 2 connect and compose travelling control hydraulic system, and Fill valve filler opening 25 is connected with load sensing multi-way valve return opening 26; Load sensing multi-way valve return opening 26 is connected with system fuel tank 12; The load feedback signal mouth 28 of load sensing multi-way valve 2 is connected with axial variable plunger pump load feedback signal mouth 27.
Oil outlet one a4, oil outlet two b4 of left pilot valve 9, oil outlet three a5, oil outlet four b5 walk to join pilot valve hydraulic fluid port one a4 ', hydraulic fluid port two b4 ' with the left lateral of load sensing multi-way valve 2 respectively, hydraulic fluid port three a5 ', hydraulic fluid port four b5 ' are connected, and control left running motor 6 respectively, right running motor 7 advances, retreats; Left pilot valve return opening 35 is connected with pipeline manifold block 18 return opening.
Oil outlet one a1, oil outlet two b1 of right pilot valve 10, oil outlet three a2, oil outlet four b2 join pilot valve hydraulic fluid port one a1 ', hydraulic fluid port two b1 ' with the swing arm of load sensing multi-way valve 2 respectively, rotating bucket joins pilot valve hydraulic fluid port one a2 ', hydraulic fluid port two b2 ' is connected, and accessory pilot valve oil outlet one a3, oil outlet two b3 joins pilot valve hydraulic fluid port one a3 ' with the accessory of load sensing multi-way valve 2 respectively, hydraulic fluid port two b3 ' is connected; The return opening of right pilot valve 10, accessory pilot valve 11 is all connected with the return opening of pipeline manifold block 18.
Install a filter 1 additional in fuel tank 12 and between pipeline connecting end, the impurity entering fuel tank 12 is filtered.
One-way valve 19, radiator 16, filter 2 14 is accessed successively between load sensing multi-way valve return opening 26 and fuel tank 12.
Operating process when the present invention works: axial variable plunger pump 1 rotates under the drive of motor, its inlet port 21 is connected system fuel feeding with fuel tank 12, oil outlet 22 is divided into two-part: first portion: for guide's oil circuit, the high pressure oil that axial variable plunger pump 1 exports first is decompressed to low pressure by oil sources valve 8 by fluid, then by right pilot valve oil outlet one a1, right pilot valve oil outlet two b1, right pilot valve oil outlet three a2, right pilot valve oil outlet four b2, accessory pilot valve oil outlet one a3, accessory pilot valve oil outlet two b3, left pilot valve oil outlet one a4, left pilot valve oil outlet two b4, left pilot valve oil outlet three a5, left pilot valve oil outlet four b5 joins pilot valve hydraulic fluid port one a1 ' with corresponding swing arm, swing arm connection pilot valve hydraulic fluid port two b1 ', rotating bucket connection pilot valve hydraulic fluid port one a2 ', rotating bucket connection pilot valve hydraulic fluid port two b2 ', accessory connection pilot valve hydraulic fluid port one a3 ', accessory connection pilot valve hydraulic fluid port two b3 ', left lateral walks to join pilot valve hydraulic fluid port one a4 ', left lateral walks to join pilot valve hydraulic fluid port two b4 ', left lateral walks to join pilot valve hydraulic fluid port three a5 ', left lateral is walked to join pilot valve hydraulic fluid port four b5 ' and is connected, and control load sensing multi-way valve 2 spool moves, second portion: for working connection, fluid by load sensing multi-way valve 2 respectively with boom cylinder hydraulic fluid port one A1 ', boom cylinder hydraulic fluid port two B1 ', rotary ink tank has mouth one A2 ', rotary ink tank hydraulic fluid port two B2 ', accessory interface hydraulic fluid port one A3 ', accessory interface hydraulic fluid port two B3 ', left running motor hydraulic fluid port one A4 ', left running motor hydraulic fluid port two B4 ', right running motor hydraulic fluid port one A5 ', right running motor hydraulic fluid port two B5 ' is connected, boom cylinder 3 is controlled by the mobile of load sensing multi-way valve 2 spool, rotary ink tank 4, accessory interface 5, left running motor 6, the action of right running motor 7.Load sensing multi-way valve load feedback signal mouth 28 can regulate according to the discharge capacity of the size of load pressure by axial variable plunger pump load feedback signal mouth 27 pairs of axial variable plunger pumps 1, axial variable plunger pump 1 output power and load are adapted, improve power utilization, reduce energy loss.

Claims (5)

1. a sliding loader open type hydraulic system, it is characterized in that, comprise by axial variable plunger pump (1) as dynamical element, load sensing multi-way valve (2) is as control unit, boom cylinder (3), rotary ink tank (4), accessory interface (5), left running motor (6), the working connection system that right running motor (7) forms as executive component, oil sources valve (8), left pilot valve (9), right pilot valve (10), guide's oil-way system that accessory pilot valve (11) forms as pilot control element and the auxiliary oil way system that fuel tank (12) consists of pipeline,
The inlet port (21) of described axial variable plunger pump (1) is connected with fuel tank (12) by pipeline; Axial variable plunger pump oil outlet (22) connects load sensing multi-way valve filler opening (23) and oil sources valve filler opening (30) respectively; Oil sources valve oil outlet (31) is connected with left pilot valve filler opening (33), right pilot valve filler opening (34), accessory pilot valve filler opening respectively by pipeline manifold block (18); Oil sources valve return opening (32) is connected with left pilot valve return opening (35), right pilot valve return opening (36), accessory pilot valve return opening (37) on the one hand respectively by pipeline manifold block (18), is connected on the other hand with fuel tank (12);
Be provided with swing arm connection (2-1), rotating bucket connection (2-2), accessory connection (2-3) in described load sensing multi-way valve (2), left lateral walks connection (2-4) and right lateral walks connection (2-5); Swing arm connection hydraulic fluid port one (A1), hydraulic fluid port two (B1) are connected with boom cylinder hydraulic fluid port one (A1 '), hydraulic fluid port two (B1 ') respectively; Rotating bucket connection hydraulic fluid port one (A2), hydraulic fluid port two (B2) are connected with rotary ink tank hydraulic fluid port one (A2 '), hydraulic fluid port two (B2 ') respectively; Accessory connection hydraulic fluid port one (A3), hydraulic fluid port two (B3) and accessory interface hydraulic fluid port one (A3 '), hydraulic fluid port two (B3 ') hydraulic fluid port are connected, formation machining device hydraulic system; Left lateral walks to join hydraulic fluid port one (A4), hydraulic fluid port two (B4) and left running motor hydraulic fluid port one (A4 '), hydraulic fluid port two (B4 ') are connected; Right lateral walks to join hydraulic fluid port one (A5), hydraulic fluid port two (B5) and right running motor hydraulic fluid port one (A5 '), hydraulic fluid port two (B5 ') are connected; Fill valve (17) and load sensing multi-way valve (2) connect and compose travelling control hydraulic system, and Fill valve filler opening (25) is connected with load sensing multi-way valve return opening (26); Load sensing multi-way valve return opening (26) is connected with system fuel tank (12); The load feedback signal mouth (28) of load sensing multi-way valve (2) is connected with axial variable plunger pump load feedback signal mouth (27);
The oil outlet one (a4) of described left pilot valve (9), oil outlet two (b4), oil outlet three (a5), oil outlet four (b5) walk to join pilot valve hydraulic fluid port one (a4 ') respectively with the left lateral of load sensing multi-way valve (2), hydraulic fluid port two (b4 '), hydraulic fluid port three (a5 '), hydraulic fluid port four (b5 ') are connected, and control left running motor (6) respectively, right running motor (7) advances, retreat; Left pilot valve return opening (35) is connected with pipeline manifold block (18) return opening;
The oil outlet one (a1) of described right pilot valve (10), oil outlet two (b1), oil outlet three (a2), oil outlet four (b2) join pilot valve hydraulic fluid port one (a1 ') respectively with the swing arm of load sensing multi-way valve (2), hydraulic fluid port two (b1 '), rotating bucket join pilot valve hydraulic fluid port one (a2 '), hydraulic fluid port two (b2 ') is connected, and accessory pilot valve oil outlet one (a3), oil outlet two (b3) join pilot valve hydraulic fluid port one (a3 ') respectively with the accessory of load sensing multi-way valve (2), hydraulic fluid port two (b3 ') is connected; The return opening of right pilot valve (10), accessory pilot valve (11) is all connected with the return opening of pipeline manifold block (18).
2. sliding loader open type hydraulic system as claimed in claim 1, is characterized in that, being provided with the reduction valve for reducing pressure to the high pressure oil from axial variable plunger pump oil outlet (22) in described oil sources valve (8).
3. sliding loader open type hydraulic system as claimed in claim 1, is characterized in that, is provided with filter one (13) in described fuel tank (12) and between pipeline connecting end.
4. sliding loader open type hydraulic system as claimed in claim 1, it is characterized in that, filter three (15) is provided with between described axial variable plunger pump (1) and oil sources valve (8), axial variable plunger pump oil outlet (22) is connected with filter three filler opening (24), and filter three oil outlet (29) is connected with oil sources valve filler opening (30).
5. sliding loader open type hydraulic system as claimed in claim 1, is characterized in that, be provided with one-way valve (19), radiator (16), filter two (14) between described load sensing multi-way valve return opening (26) and fuel tank (12) successively.
CN201410386350.6A 2014-08-07 2014-08-07 A kind of sliding loader open type hydraulic system Active CN104179738B (en)

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CN104179738B true CN104179738B (en) 2016-04-13

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109235533B (en) * 2018-09-13 2020-11-17 广西柳工机械股份有限公司 Loader working hydraulic system

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CN204113779U (en) * 2014-08-07 2015-01-21 龙工(上海)精工液压有限公司 Sliding loader open type hydraulic system

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Publication number Priority date Publication date Assignee Title
JPS60123630A (en) * 1983-12-06 1985-07-02 Kayaba Ind Co Ltd Control circuit for construction vehicle
CN101363460A (en) * 2008-09-25 2009-02-11 沈阳北方交通重工集团有限公司 Closed hydraulic system for synchronous chip sealer
CN101709623A (en) * 2009-12-02 2010-05-19 煤炭科学研究总院西安研究院 Integral coal mine drilling machine hydraulic system capable of satisfying multiple drilling modes
JP2011196436A (en) * 2010-03-18 2011-10-06 Yanmar Co Ltd Hydraulic circuit for working vehicle
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CN103299087A (en) * 2011-01-06 2013-09-11 日立建机株式会社 Hydraulic drive of work machine equipped with crawler-type traveling device
CN102971542A (en) * 2011-02-03 2013-03-13 日立建机株式会社 Power regeneration device for work machine
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CN204113779U (en) * 2014-08-07 2015-01-21 龙工(上海)精工液压有限公司 Sliding loader open type hydraulic system

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