CN102720232B - Damping device of swing arms of slipping steering loaders - Google Patents

Damping device of swing arms of slipping steering loaders Download PDF

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Publication number
CN102720232B
CN102720232B CN201210197132.9A CN201210197132A CN102720232B CN 102720232 B CN102720232 B CN 102720232B CN 201210197132 A CN201210197132 A CN 201210197132A CN 102720232 B CN102720232 B CN 102720232B
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China
Prior art keywords
way solenoid
solenoid valve
swing arm
valve
boom cylinder
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CN201210197132.9A
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CN102720232A (en
Inventor
牛宏杰
李盛龙
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Guangxi Liugong Machinery Co Ltd
Liugong Changzhou Machinery Co Ltd
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Guangxi Liugong Machinery Co Ltd
Jiangsu Liugong Machinery Co Ltd
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Abstract

The invention discloses a damping device of swing arms of slipping steering loaders, comprising a swing arm cylinder, a three-position six-way valve which is used for controlling the swing arm cylinder, an energy accumulator, a fuel tank, a first two-position two-way solenoid valve and a second two-position two-way solenoid valve. The first two-position two-way solenoid valve comprises a zero leakage plug-in-type cut-off valve. The large chamber of the swing arm cylinder is connected with the energy accumulator by an oil pipe and the first two-position two-way solenoid valve is arranged on the pipeline between the large chamber of the swing arm cylinder and the energy accumulator. The small chamber of the swing arm cylinder is connected with the fuel tank by the second two-position two-way solenoid valve. The damping device has beneficial effects that the two-position two-way solenoid valves adopted by the invention has a two-direction zero-leakage cutting off function, thus in the case of long-time halt state, the oil pressure in the energy accumulator remains unchanged to effectively avoid bad damping effects or damping failure which are caused by leakage of oil in the energy accumulator. A fixed throttling valve is adopted to reduce the purchase cost and adjustment workload and improve the reliability of the damping device.

Description

Glide steering loader swing arm vibration absorber
Technical field
The present invention relates to a kind of vibration absorber, particularly a kind of glide steering loader swing arm vibration absorber.
Background technology
The wheel limit of sliding loader is supported with vehicle frame for being rigidly connected, because the excited vibration that Uneven road causes is born by tire completely.Because the operating mode of sliding loader is more severe, add the center of gravity of equipment beyond vehicle frame, therefore when travelling hauling operation, can produce strong vibration and impact, had a strong impact on the regularity and stability that complete machine travels.These impacts can cause the structural members such as equipment and vehicle frame to produce fatigue damage, the comfortableness variation of vehicle, and the fatigue that easily causes personnel to drive, serious meeting causes damage.Because vibration also can cause the material in scraper bowl to scatter.Also limit long travel speed during apart from transition operation simultaneously, reduced the efficiency of fuel economy and operation.
Chinese patent CN2736315Y discloses a kind of running stabilizing device for wheel type loader, and what on this wheel loader, adopt is the compositions such as two position four-way solenoid valves, adjustable throttling, accumulator, pipeline.When travelling, after two position four-way solenoid valve energisings, the large chamber of boom cylinder is connected with accumulator by adjustable throttling, and boom cylinder loculus is directly communicated with hydraulic oil container simultaneously.
Prior art has the following disadvantages:
1. liang position four-way solenoid valve is due to design feature, gap between valve core of the electromagnetic valve and valve body can cause the pressure oil in accumulator constantly to pass through clearance leakage oil sump tank, so in the process of moving, because the fluid in accumulator constantly reduces, pressure constantly reduces, and the effect of vibration damping also can become worse and worse.If the pressure oil of parking for a long time in rear accumulator can all leak in hydraulic oil container, now vibration insulating system is by ineffective.
2. due to what adopt, be adjustable throttling, in manufacture course of products, increased debugging work.If product to after in user's hand in maintenance process choke valve be conditioned, effectiveness in vibration suppression can change, serious meeting loses vibration-damping function.
3. security incident in the loop that the large chamber of accumulator and swing arm forms, overflow valve is not set, if road excitation, after surpassing more greatly the maximum bearing capacity of accumulator, can occur.
Summary of the invention
Goal of the invention: the object of this invention is to provide a kind of simple in structurely, assembling and setting, maintenanceability are better, and reliability is high, the glide steering loader swing arm vibration absorber of low cost of manufacture.
Technical scheme: a kind of glide steering loader swing arm vibration absorber, comprise boom cylinder, for controlling three six-way valves, accumulator and fuel tanks of boom cylinder, also comprise the first two-position two-way solenoid valve and the second two-position two-way solenoid valve, described the first two-position two-way solenoid valve comprises the plug-in stop valve of a zero leakage; The large chamber of described boom cylinder is connected by oil pipe with accumulator, and described the first two-position two-way solenoid valve is arranged between the large chamber of boom cylinder and accumulator on pipeline; The loculus of described boom cylinder is connected with fuel tank by the second two-position two-way solenoid valve.
When glide steering loader needs to absorb the vibration that boom cylinder is subject to and impacts in transported material process, three six-way valves are in meta, the first two-position two-way solenoid valve and the second two-position two-way solenoid valve obtain electric in connected state, the direct oil sump tank of fluid that oil pump pumps, the large chamber of boom cylinder is connected with accumulator by the first two-position two-way solenoid valve, and the loculus of boom cylinder is connected with fuel tank by the second two-position two-way solenoid valve.When the pressurized of the large chamber of boom cylinder, the fluid in large chamber enters accumulator, pressure decreased; Loculus produces negative pressure from oil suction in fuel tank, if not from fuel tank oil suction eliminate negative pressure and can make the gas evolution in fluid produce cavitation to oil cylinder inner wall, affect the application life of oil cylinder.When the loculus pressurized of boom cylinder, the fluid in loculus is got back to fuel tank, and accumulator is filled with large chamber by part fluid.
When glide steering loader is shoveling dress and do not need during material vibration that boom cylinder is subject to and impact to absorb, three six-way valves are in two other position, and the first two-position two-way solenoid valve and the second two-position two-way solenoid valve dead electricity are in cut-off state.Now complete isolated the opening of the large chamber of boom cylinder and accumulator, can guarantee the zero leakage of accumulator.
In order to improve the debugging maintainability of vibration absorber, between described the first two-position two-way solenoid valve and the large chamber of boom cylinder, be provided with fixed restrictive valve.
In order to improve reliability and the safety of vibration absorber, between the large chamber of described accumulator and boom cylinder, be provided with overflow valve, prevent from producing instantaneous pressure and surpass the maximum bearing capacity of accumulator and security incident occurs in vibration damping process.
Beneficial effect: the 2/2-way electromagnetic valve that the present invention adopts has Bidirectional zero and leaks cutoff function; even therefore for a long time in stopped status; oil liquid pressure in accumulator also can remain unchanged, and has effectively avoided the phenomenon that causes effectiveness in vibration suppression variation or vibration damping to lose efficacy because of the oil liquid leakage in accumulator.The use of fixed restrictive valve has reduced purchase cost and debugging work load, has increased the reliability of vibration absorber.
Accompanying drawing explanation
Hydraulic schematic diagram when Fig. 1 is swing arm vibration absorber work of the present invention;
Fig. 2 is the hydraulic schematic diagram of the present invention while cutting off swing arm vibration absorber.
The specific embodiment
As shown in Figure 1, a kind of glide steering loader swing arm vibration absorber, comprise boom cylinder 1, for controlling three six-way valves 2, accumulator 3 and the fuel tank 4 of boom cylinder 1, also comprise the first two-position two-way solenoid valve 5 and the second two-position two-way solenoid valve 6, described the first two-position two-way solenoid valve 5 comprises the plug-in stop valve 51 of a zero leakage; The large chamber of described boom cylinder 1 is connected by oil pipe with accumulator 3, and described the first two-position two-way solenoid valve 5 is arranged between the large chamber of boom cylinder 1 and accumulator 3 on pipeline; The loculus of described boom cylinder 1 is connected with fuel tank 4 by the second two-position two-way solenoid valve 6.
When glide steering loader needs to absorb the vibration that boom cylinder 1 is subject to and impacts in transported material process, three six-way valves 2 are in meta, the first two-position two-way solenoid valve 5 and the second two-position two-way solenoid valve 6 obtain electric in connected state, the direct oil sump tank 4 of fluid that oil pump pumps, the large chamber of boom cylinder 1 is connected with accumulator 3 by the first two-position two-way solenoid valve 5, and the loculus of boom cylinder 1 is connected with fuel tank 4 by the second two-position two-way solenoid valve 6.When the pressurized of the large chamber of boom cylinder 1, the fluid in large chamber enters accumulator 3, pressure decreased; Loculus produces negative pressure from the interior oil suction of fuel tank 4, if not from fuel tank 4 oil suction eliminate negative pressure and can make the gas evolution in fluid produce cavitation to oil cylinder inner wall, affect the application life of oil cylinder.When the loculus pressurized of boom cylinder 1, the fluid in loculus is got back to fuel tank 4, and accumulator 3 is filled with large chamber by part fluid.
As shown in Figure 2, when glide steering loader is shoveling dress and does not need during material vibration that boom cylinder 1 is subject to and impact to absorb, three six-way valves 2 are in two other position, and the first two-position two-way solenoid valve 5 and the second two-position two-way solenoid valve 6 dead electricity are in cut-off state.Now the large chamber of boom cylinder 1 and complete isolated the opening of accumulator 3, can guarantee the zero leakage of accumulator 3.
In order to improve the debugging maintainability of vibration absorber, between described the first two-position two-way solenoid valve 5 and the large chamber of boom cylinder 1, be provided with fixed restrictive valve 7.
In order to improve reliability and the safety of vibration absorber, between described accumulator 3 and the large chamber of boom cylinder 1, be provided with overflow valve 8, prevent from producing instantaneous pressure and surpass the maximum bearing capacity of accumulator 3 and security incident occurs in vibration damping process.

Claims (3)

1. a glide steering loader swing arm vibration absorber, comprise boom cylinder (1), for controlling three six-way valves (2), accumulator (3) and the fuel tank (4) of boom cylinder (1), it is characterized in that: also comprise the first two-position two-way solenoid valve (5) and the second two-position two-way solenoid valve (6), described the first two-position two-way solenoid valve (5) comprises the plug-in stop valve (51) of a zero leakage; The large chamber of described boom cylinder (1) is connected by oil pipe with accumulator (3), and described the first two-position two-way solenoid valve (5) is arranged between the large chamber of boom cylinder (1) and accumulator (3) on pipeline; The loculus of described boom cylinder (1) is connected with fuel tank (4) by the second two-position two-way solenoid valve (6).
2. glide steering loader swing arm vibration absorber as claimed in claim 1, is characterized in that: between described the first two-position two-way solenoid valve (5) and the large chamber of boom cylinder (1), be provided with fixed restrictive valve (7).
3. glide steering loader swing arm vibration absorber as claimed in claim 1, is characterized in that: between described accumulator (3) and the large chamber of boom cylinder (1), be provided with overflow valve (8).
CN201210197132.9A 2012-06-15 2012-06-15 Damping device of swing arms of slipping steering loaders Active CN102720232B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210197132.9A CN102720232B (en) 2012-06-15 2012-06-15 Damping device of swing arms of slipping steering loaders

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Application Number Priority Date Filing Date Title
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CN102720232B true CN102720232B (en) 2014-10-29

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106594166A (en) * 2016-12-06 2017-04-26 天津高卓科技有限公司 Electromechanical shock absorbing mechanism controlled by pressure comparison
CN110894731A (en) * 2019-11-28 2020-03-20 徐工集团工程机械股份有限公司 Working device buffer system and engineering equipment
CN111501894B (en) * 2020-05-19 2024-02-02 江苏徐工工程机械研究院有限公司 Driving stabilization system, backhoe loader, and control method
CN112942456B (en) * 2021-01-29 2022-07-29 上海三一重机股份有限公司 Loader mobile arm shock mitigation system and operation machinery

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61151341A (en) * 1984-12-25 1986-07-10 Hitachi Constr Mach Co Ltd Front mechanism controlling device for construction machine
JPS63265024A (en) * 1987-04-20 1988-11-01 Kobe Steel Ltd Vibration suppressor for vehicular construction machine
KR20040093891A (en) * 2003-04-30 2004-11-09 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 hydraulic circuit of having boom float position
CN2736315Y (en) * 2004-08-21 2005-10-26 山东临工工程机械有限公司 Running stabilizing device for wheel type loader
CN101251134A (en) * 2008-03-26 2008-08-27 中色科技股份有限公司 Leak-proof design for maintenance of electrohydraulic servo valve
CN101793042A (en) * 2009-12-31 2010-08-04 福田雷沃国际重工股份有限公司 Hydraulic loop device used for coordinating machine body rotation and movable arm swinging of digging machine
CN202595778U (en) * 2012-06-15 2012-12-12 江苏柳工机械有限公司 Skid-steer loader movable arm vibration reduction device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61151341A (en) * 1984-12-25 1986-07-10 Hitachi Constr Mach Co Ltd Front mechanism controlling device for construction machine
JPS63265024A (en) * 1987-04-20 1988-11-01 Kobe Steel Ltd Vibration suppressor for vehicular construction machine
KR20040093891A (en) * 2003-04-30 2004-11-09 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 hydraulic circuit of having boom float position
CN2736315Y (en) * 2004-08-21 2005-10-26 山东临工工程机械有限公司 Running stabilizing device for wheel type loader
CN101251134A (en) * 2008-03-26 2008-08-27 中色科技股份有限公司 Leak-proof design for maintenance of electrohydraulic servo valve
CN101793042A (en) * 2009-12-31 2010-08-04 福田雷沃国际重工股份有限公司 Hydraulic loop device used for coordinating machine body rotation and movable arm swinging of digging machine
CN202595778U (en) * 2012-06-15 2012-12-12 江苏柳工机械有限公司 Skid-steer loader movable arm vibration reduction device

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Effective date of registration: 20210105

Address after: No.588, Yancheng South Road, Wujin high tech Industrial Development Zone, Changzhou City, Jiangsu Province 213164

Patentee after: LIUGONG CHANGZHOU MACHINERY Co.,Ltd.

Patentee after: GUANGXI LIUGONG MACHINERY Co.,Ltd.

Address before: 212005 No.1 Ningzhen Road, Zhenjiang City, Jiangsu Province

Patentee before: Jiangsu Liugong Machinery Co.,Ltd.

Patentee before: GUANGXI LIUGONG MACHINERY Co.,Ltd.

TR01 Transfer of patent right