CN100359105C - Walking hydraulic system for four-wheel driving fully hydraulic loader - Google Patents
Walking hydraulic system for four-wheel driving fully hydraulic loader Download PDFInfo
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- CN100359105C CN100359105C CNB2005100497937A CN200510049793A CN100359105C CN 100359105 C CN100359105 C CN 100359105C CN B2005100497937 A CNB2005100497937 A CN B2005100497937A CN 200510049793 A CN200510049793 A CN 200510049793A CN 100359105 C CN100359105 C CN 100359105C
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- 238000006073 displacement reaction Methods 0.000 claims description 13
- 239000002828 fuel tank Substances 0.000 claims description 10
- 239000003638 chemical reducing agent Substances 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 238000009434 installation Methods 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 abstract 1
- 230000001141 propulsive effect Effects 0.000 description 3
- 241000272165 Charadriidae Species 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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Abstract
The present invention relates to a walking hydraulic system for four-wheel driving fully hydraulic loaders, which comprises a front-wheel driving device and a rear-wheel driving device of a walking part of the loader; the front-wheel driving device and the rear-wheel driving device are respectively provided with a left-front, right-front, left-rear and right-rear driving devices; the left and the right front-wheel driving devices are respectively provided with a hydraulic motor with a brake; the left and the right rear-wheel driving devices are respectively provided with an integral clutch-brake hydraulic motor; a left hydraulic motor with a brake and the left integral clutch-brake hydraulic motor are connected with a left-hand operation speed regulation reversing valve; a right hydraulic motor with a brake, and the right integral clutch-brake hydraulic motor are connected with a right-hand operation speed regulation reversing valve; the left integral clutch-brake hydraulic motor and the right integral clutch-brake hydraulic motor are connected with a left-pedal reversing valve; the left hydraulic motor with a brake and the right hydraulic motor with a brake are connected with the right-pedal reversing valve; the oil inlets of the left-hand operation speed regulation reversing valve and the right-hand operation speed regulation reversing valve are connected with a double-coupling constant rate pump. The present invention which has the advantages that the present invention simplifies the structure and simultaneously enhances the running reliability and work efficiency, and can be suitable for various bad roadway conditions. The present invention has the advantages of simple installation and low cost in production, manufacture and maintenance.
Description
Technical field
The present invention relates to a kind of engineering machinery field, relate in particular to a kind of its ground-engaging element and adopt full hydraulic drive to realize soon, advance at a slow speed, retreat, turn to, also can realize the full hydraulic loader running part hydraulic system of four-wheel drive.But it is particularly suitable for requiring bearing in pivot stud, the maneuverable construction project in the engineering mechanical device of operating modes such as loading and unloading and uses.
Background technology
Loader is the important engineering machinery that is used for bearing in modern times, the heavy construction project work such as shovel loading and unloading.Its power form of running part that has traditional loader now mainly is that the motor in the loader is connected to reduction box through fluid torque-converter, and described reduction box is given transmission of power the drive axle and the wheel of loader.
The shortcoming of this traditional Mechanical Driven design be structure compact inadequately, take up room bigger; Next be fluid torque-converter gearshift performance not as good as the sound hydraulic-driven good; Its three be two wheel drive to pass through performance good not as good as four-wheel drive, but four-wheel drive pivot turn, the turning radius of hydrostatic drive are little more than Mechanical Driven, thereby applicable to working in the narrow work items in place.
The loader hydraulic system more complicated of external existing all-hydraulic four-wheel drive, thereby increase cost, limited its application value.
Summary of the invention
Purpose of the present invention is exactly in order to overcome above-mentioned the deficiencies in the prior art part, provide a kind of adopt hydraulic system to realize advancing, retreat, turn to and can realize four-wheel drive simple in structure, cost is lower and reliability walking hydraulic system for four-wheel driving fully hydraulic loader preferably.
The objective of the invention is by providing a kind of walking hydraulic system for four-wheel driving fully hydraulic loader to realize that it comprises two front-wheel fluid pressure drive devices and two trailing wheel fluid pressure drive devices of loader running part with following structure.
Described front-wheel drive is set to the near front wheel drive unit and off-front wheel drive unit, and described rear wheel drive device is set to left rear wheel drive unit and off hind wheel drive unit;
Described the near front wheel drive unit disposes the first left hydraulic motor of a band brake, and described off-front wheel drive unit disposes the first right hydraulic motor of a band brake;
Described left rear wheel drive unit disposes second a clutch stepper integrated left hydraulic motor, the described second left hydraulic motor connects a left lateral star reducer, described left lateral star reducer is connected with described left rear wheel drive unit, described off hind wheel drive unit disposes one clutch stepper integrated second right hydraulic motor, the described second right hydraulic motor connects a right lateral star reducer, and described right lateral star reducer is connected with described off hind wheel drive unit.
The first left hydraulic motor of described band brake is connected the moving timing reversal valve of a left hand with the described second clutch stepper integrated left hydraulic motor, the first right hydraulic motor of described band brake is connected the moving timing reversal valve of a right hand with the described clutch stepper integrated second right hydraulic motor.
The clutch of the described second left hydraulic motor is connected a left threading transfer valve with brake with the clutch of the described second right hydraulic motor with brake, the brake of the described first left hydraulic motor is connected a right threading transfer valve with the brake of the described second right hydraulic motor.
Described left threading transfer valve is used to control left and right clutch of trailing wheel and brake, when described left threading transfer valve is in free state, and all logical fuel tank of left and right clutch, all logical high pressure rib valve of left and right brake, this moment, hydraulic motor was in running order; When described left threading transfer valve is in the state of riding, left and right clutch high pressure rib valve, and all logical fuel tank of left and right brake, this moment, hydraulic motor was in on-position, and clutch and hydraulic motor disengaging back wheel can freely be rotated.
The oil-in of the oil-in of the moving timing reversal valve of described left hand, the moving timing reversal valve of the described right hand is connected with the oil-out of duplex constant displacement pump respectively, and described duplex constant displacement pump is set to the constant displacement pump of the identical parallel connection of two discharge capacities.
The oil-out of the oil-out of the moving timing reversal valve of described left hand, the moving timing reversal valve of the described right hand is in parallel to be connected with fuel tank.
The moving timing reversal valve of described left hand was set to be connected in parallel with the first left hydraulic motor of described band brake, described clutch stepper integrated being connected of the second left hydraulic motor.
The moving timing reversal valve of the described right hand was set to be connected in parallel with being connected of the first right hydraulic motor of described band brake, the described clutch stepper integrated second right hydraulic motor.
Described left threading transfer valve is connected with brake with the clutch of brake, the described second right hydraulic motor with the clutch of the described second left hydraulic motor and is set to be connected in parallel.
Described right threading transfer valve with being connected of the first right hydraulic motor of the first left hydraulic motor of described band brake, described band brake be set to be connected in parallel.
The clutch of the described second left hydraulic motor and the clutch of brake, the described second right hydraulic motor are connected with the control oil channel of brake and are set to interlocking and connect.When just the brake oil cylinder led to pressure oil, clutch oil cylinder led to fuel tank, and when the brake oil cylinder led to fuel tank, clutch oil cylinder led to pressure oil.
Described the near front wheel drive unit, off-front wheel drive unit and described left rear wheel drive unit, off hind wheel drive unit are supplied with and controlled to first constant displacement pump of the parallel connection that described two discharge capacities are identical and second constant displacement pump independently of one another by moving timing reversal valve of described left hand and the moving timing reversal valve of the described right hand respectively.
Each is provided with hydraulic motor separately preceding revolver of the present invention, front right wheel, back revolver and rear right wheel drive unit, and each hydraulic motor is provided with brake, trailing wheel is provided with clutch, thereby can left and right two front-wheel drives, again can left and right two front-wheels and the four-wheel drive of left and right two trailing wheels; Empty or when skidding when fore carriage, make and can realize that front wheel brake can be worked trailing wheel; When need are run at high speed or trailing wheel is built on stilts or when skidding, with rear wheel brake braking, throw-out-of clutch, this moment, front-wheel can operate as normal; When commutation was in meta, four-wheel all was in on-position.
Compared with prior art, the invention has the advantages that: 1. adopt underloading that hydraulic system realizes the loader running gear fast or heavy duty is advanced at a slow speed, retreats, turned to and the function of four-wheel drive, in simplified structure, improve reliability of operation again; 2. high efficiency, manoeuvrable also can adapt to various abominable roustabout's shapes, and turning radius is little, but pivot stud is functional, and be applied widely; 3. structure is lower with the cost of installing simply, assemble, make and safeguarding.
Description of drawings
Fig. 1 is a hydraulic system principle figure of the present invention;
The specific embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
Fig. 1 shows an embodiment of walking hydraulic system for four-wheel driving fully hydraulic loader of the present invention.Each is provided with the near front wheel drive unit 21 and off-front wheel drive unit 22 separately the front-wheel drive of loader running part; The near front wheel drive unit 21 configuration one brake 71 and left hydraulic motors 11, off-front wheel drive unit 22 configuration one brake 72 and right hydraulic motors 12.
The rear wheel drive device of loader running part respectively is provided with a left rear wheel drive unit 41 and off hind wheel drive unit 42; Left rear wheel drive unit 41 configuration one clutch, 81 brakes 73 and left hydraulic motors 31; Off hind wheel drive unit 42 configuration one clutch, 82 brakes 74 and hydraulic motors 32.
The left hydraulic motor 11 of band brake and the clutch stepper integrated left hydraulic motor 31 moving proportionality velocity modulation reversal valve 51 of a left hand that is connected in parallel jointly; The right hydraulic motor 12 of band brake and the clutch stepper integrated right hydraulic motor 32 moving proportionality velocity modulation reversal valve 52 of a right hand that is connected in parallel jointly.
Clutch 81 brakes 73 of left side hydraulic motor 31 and clutch 82 brakes 74 of the right hydraulic motor 32 left threading transfer valve 61 that is connected in parallel jointly; The brake 71 of left side hydraulic motor 11 and the brake 72 of the right hydraulic motor 12 right threading transfer valve 62 that is connected in parallel jointly.
Described left threading transfer valve is used to control left and right clutch of trailing wheel and brake, when described left threading transfer valve is in free state, and all logical fuel tank of left and right clutch, all logical high pressure rib valve of left and right brake, this moment, hydraulic motor was in running order; When described left threading transfer valve is in the state of riding, left and right clutch high pressure rib valve, and all logical fuel tank of left and right brake, this moment, hydraulic motor was in on-position, and clutch and hydraulic motor disengaging back wheel can freely be rotated.
The oil-in 53 of the moving proportionality velocity modulation reversal valve 51 of left hand is connected with the oil-out of duplex constant displacement pump 701; The oil-in 54 of the moving timing reversal valve 52 of the right hand is connected with the oil-out of duplex constant displacement pump 702.
Clutch 81 and the oil circuit of brake 73 of left side hydraulic motor 31 is interconnected locks mutually; The clutch 82 of right hydraulic motor 32 and the oil circuit of brake 74 are interconnected locks mutually.Its brake engages when being the rear wheel clutches disengagement, its brake was thrown off when rear wheel clutches engaged.
The constant displacement pump 701,702 that two discharge capacities of duplex constant displacement pump 7 are identical connects the oil-in 53 of the moving proportionality velocity modulation reversal valve of left hand and the oil-in 54 of the moving timing reversal valve of the right hand respectively.
The design feature of walking hydraulic system for four-wheel driving fully hydraulic loader of the present invention is:
Employing drives the right hydraulic motor 12 drive off-front wheels 22 of the near front wheel 21, band brake with the left hydraulic motor 11 of band brake; Employing drives left rear wheel drive unit 41, drives off hind wheel 42 with clutch stepper integrated right hydraulic motor 32 with clutch stepper integrated left hydraulic motor 31; Adopt left hand to move proportionality velocity modulation reversal valve 51 and the moving proportionality velocity modulation reversal valve 52 combination controls of the right hand, the stepless speed regulation of realization loader becomes and advances, retreats and turn to; Adopt the switching realization four-wheel drive of left threading valve 61 and right threading valve 62 and the conversion between the two-wheel drive.In direction control, can adopt traditional hydraulic steering gear to realize, also can adopt the moving proportionality velocity modulation reversal valve 51 of left hand to realize loading machine steering with the manipulation that the right hand moves proportionality velocity modulation reversal valve 52.
The functional characteristics of walking hydraulic system for four-wheel driving fully hydraulic loader of the present invention is:
On the slope, because the near front wheel drive unit 21, off-front wheel drive unit 22, left rear wheel drive unit 41, off hind wheel drive unit 42 are provided with brake, all can brake when on fast running or slope, travelling fast and reliablely, and can be parked in for a long time on the slope not for gliding.
2. empty or when skidding when fore carriage, make the realization rear wheel drive; When trailing wheel is maked somebody a mere figurehead or is skidded, can make front-wheel drive, thereby can normally operation on rugged abominable place.
When 3. travelling when advancing on the slope, be provided with equalizing valve 91 and 92 in the system downwards, they can prevent to load hypervelocity reliably and slide, with the safety that guarantees that loader travels on the slope.
4. when four-wheel drive, big propulsive force can satisfy loads the technology that mechanical shovel soil loads; When two front-wheel drives, can satisfy the operating mode of loader fast running on flat ground surface.
5. the good left rear wheel drive unit 41 of propulsive performance, off hind wheel drive unit 42 are by the independently hydraulic motor control of band brake clutch, and left and right rear wheel drive device is to be driven by gearbox by hydraulic motor, and the gearbox gearratio is big thereby the moment of torsion left and right trailing wheel of transmission is big; Next is that left and right trailing wheel and left and right front-wheel can be worked simultaneously; Thereby the propulsive performance of loader is good; Secondly be again when the front-wheel that loader takes place skids or front-wheel when built on stilts, front wheel brake can be able to be prevented that the pressure of hydraulic system from descending this moment, make trailing wheel can continue the propelling loader and be in normal operating mode.
6. the clutch of the good left and right rear wheel drive of starting performance and brake are interlockings, and when rear wheel clutches engaged, the brake of rear wheel drive was thrown off, and the hydraulic motor of trailing wheel is promptly in running order; Four-wheel drives simultaneously during starting, thereby the starting performance of loader is good.
7. the dexterous because double pump of turning action drives left front, trailing wheel hydraulic motor and right front, trailing wheel hydraulic motor respectively, and realize the left and right stepless speed regulation of taking turns by manual proportionality velocity modulation reversal valve respectively, make loader turning action dexterity, turning radius is little, when one side hydraulic motor was just changeing the counter-rotating of another side hydraulic motor, loader can be realized pivot stud.
Walking hydraulic system for four-wheel driving fully hydraulic loader design of the present invention is ingenious, the forward and backward bridge in the existing loader of simplification and the design of steering mechanism, high efficiency, multiple functional, flexible operation, safe and reliable, make and load the various abominable place operating modes of functional adaptation, be disposed on the loader take up space less, install simply, low cost of manufacture, good economy performance.
Claims (7)
1. walking hydraulic system for four-wheel driving fully hydraulic loader, it comprises two front-wheel fluid pressure drive devices and two trailing wheel fluid pressure drive devices of loader running part, it is characterized in that:
A. described front-wheel drive is set to the near front wheel drive unit (2 1) and off-front wheel drive unit (22), and described rear wheel drive device is set to left rear wheel drive unit (41) and off hind wheel drive unit (42);
The first left hydraulic motor (11) of b. described the near front wheel drive unit (21) configuration one band brake, the first right hydraulic motor (12) of described off-front wheel drive unit (22) configuration one band brake;
C. described left rear wheel drive unit (41) disposes second a clutch stepper integrated left hydraulic motor (31), the described second left hydraulic motor (31) connects a left lateral star reducer, described left lateral star reducer is connected with described left rear wheel drive unit (41), described off hind wheel drive unit (42) configuration one clutch stepper integrated second right hydraulic motor (32), the described second right hydraulic motor (32) connects a right lateral star reducer, and described right lateral star reducer is connected with described off hind wheel drive unit (42);
D. first of the described band brake left hydraulic motor (11) is connected the moving timing reversal valve (51) of a left hand with the described second clutch stepper integrated left hydraulic motor (31), and the first right hydraulic motor (12) of described band brake is connected the moving timing reversal valve (52) of a right hand with the described clutch stepper integrated second right hydraulic motor (32);
The clutch of the e. described second left hydraulic motor (31) is connected a left threading transfer valve (61) with brake with the clutch of the described second right hydraulic motor (32) with brake, the brake of the described first left hydraulic motor (11) is connected a right threading transfer valve (62) with the brake of the described second right hydraulic motor (12);
The oil-in (54) of the oil-in (53) of the moving timing reversal valve (51) of f. described left hand, the moving timing reversal valve (52) of the described right hand is connected with the oil-out of duplex constant displacement pump (7) respectively, and described duplex constant displacement pump (7) is set to the constant displacement pump (701,702) of the identical parallel connection of two discharge capacities;
The oil-out (56) of the oil-out (55) of the moving timing reversal valve (51) of G. described left hand, the moving timing reversal valve (52) of the described right hand is in parallel to be connected with fuel tank.
2. walking hydraulic system for four-wheel driving fully hydraulic loader according to claim 1 is characterized in that: described left hand moves timing reversal valve (51) and is set to be connected in parallel with the first left hydraulic motor (11) of described band brake, described second clutch stepper integrated being connected of left hydraulic motor (31).
3. walking hydraulic system for four-wheel driving fully hydraulic loader according to claim 1 is characterized in that: the described right hand moves timing reversal valve (52) and is set to be connected in parallel with the first right hydraulic motor (12) of described band brake, described clutch stepper integrated second being connected of right hydraulic motor (32).
4. walking hydraulic system for four-wheel driving fully hydraulic loader according to claim 1 is characterized in that: described left threading transfer valve (61) is connected with brake with the clutch of brake, the described second right hydraulic motor (32) with the clutch of the described second left hydraulic motor (31) and is set to be connected in parallel.
5. walking hydraulic system for four-wheel driving fully hydraulic loader according to claim 1 is characterized in that: described right threading transfer valve (62) with first being connected of right hydraulic motor (12) of the first left hydraulic motor (11) of described band brake, described band brake be set to be connected in parallel.
6. according to claim 1 or 4 described walking hydraulic system for four-wheel driving fully hydraulic loader, it is characterized in that: the clutch of the described second left hydraulic motor (31) and the clutch of brake, the described second right hydraulic motor (32) are connected with the control oil channel of brake and are set to interlocking and connect, when just the brake oil cylinder leads to pressure oil, clutch oil cylinder leads to fuel tank, when the brake oil cylinder led to fuel tank, clutch oil cylinder led to pressure oil.
7. walking hydraulic system for four-wheel driving fully hydraulic loader according to claim 1 is characterized in that: described the near front wheel drive unit (21), off-front wheel drive unit (22) and described left rear wheel drive unit (41), off hind wheel drive unit (42) are supplied with and controlled to the constant displacement pump (701,702) of the parallel connection that described two discharge capacities are identical independently of one another by moving timing reversal valve (51) of described left hand and the moving timing reversal valve (52) of the described right hand respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100497937A CN100359105C (en) | 2005-05-11 | 2005-05-11 | Walking hydraulic system for four-wheel driving fully hydraulic loader |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100497937A CN100359105C (en) | 2005-05-11 | 2005-05-11 | Walking hydraulic system for four-wheel driving fully hydraulic loader |
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| Publication Number | Publication Date |
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| CN1707039A CN1707039A (en) | 2005-12-14 |
| CN100359105C true CN100359105C (en) | 2008-01-02 |
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| CNB2005100497937A Active CN100359105C (en) | 2005-05-11 | 2005-05-11 | Walking hydraulic system for four-wheel driving fully hydraulic loader |
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Cited By (1)
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| CN111213494A (en) * | 2018-11-26 | 2020-06-02 | 凯斯纽荷兰(中国)管理有限公司 | Braking system of harvester and using method thereof |
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| CN110962924B (en) * | 2019-12-06 | 2021-04-06 | 湖南中联重科智能高空作业机械有限公司 | Hydraulic driving and steering system and aerial working machine |
| CN114908834B (en) * | 2022-06-21 | 2023-06-16 | 吉林大学 | Full-hydraulic walking and operation hybrid power wheel loader |
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| CN2185253Y (en) * | 1994-03-09 | 1994-12-14 | 赵育光 | Translational motion type rear-unloading loader |
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| CN1707039A (en) | 2005-12-14 |
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Assignee: Ningbo Dagang Yining Hydraulic Co., Ltd. Assignor: Hu Shixuan Contract record no.: 2010330002224 Denomination of invention: Walking hydraulic system for four-wheel driving fully hydraulic loader Granted publication date: 20080102 License type: Exclusive License Open date: 20051214 Record date: 20101203 |
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Owner name: NINGBO DAGANG INI HYDRAULIC CO., LTD. Free format text: FORMER OWNER: HU SHIXUAN Effective date: 20110526 |
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Effective date of registration: 20110526 Address after: 315806 No. 288 west head dam, Beilun District, Zhejiang, Ningbo Patentee after: Ningbo Dagang Yining Hydraulic Co., Ltd. Address before: Zhenhai District 315200 in Zhejiang province Ningbo City Shun Road Building 15-2 Room 302 Patentee before: Hu Shixuan |
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Address after: 315806 No. 288 west head dam, Beilun District, Zhejiang, Ningbo Patentee after: Ini Hhydraulic Co., Ltd. Address before: 315806 No. 288 west head dam, Beilun District, Zhejiang, Ningbo Patentee before: Ningbo Dagang Yining Hydraulic Co., Ltd. |