CN102536969B - Novel exhaust process of differential hydraulic cylinder - Google Patents
Novel exhaust process of differential hydraulic cylinder Download PDFInfo
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- CN102536969B CN102536969B CN201210050364.1A CN201210050364A CN102536969B CN 102536969 B CN102536969 B CN 102536969B CN 201210050364 A CN201210050364 A CN 201210050364A CN 102536969 B CN102536969 B CN 102536969B
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Abstract
The invention relates to the field of exhaust manners of differential hydraulic cylinders, in particular to a novel exhaust process of a differential hydraulic cylinder, and solves the problems that the existing exhaust process of the differential hydraulic cylinder takes much working hours and has poor effects. The specific process includes steps as follows: a driving cab is adjusted to a locking position, a reversing valve is switched to a middle position of left and right sides and disconnects an oil path (3) from a hydraulic pump, oil liquid is injected into a pipe expansion section rodless cavity through the oil path (3) from the disconnection part until the oil liquid passes through an oil path (4) communicated with a pipe non-expansion rod cavity and is discharged into an oil tank through an oil path (2), the injection is ended when the oil liquid level in the oil tank achieves a required position, and the oil path (3) is connected with the hydraulic pump. The novel exhaust process of the differential hydraulic cylinder has skillful process design, air existing in the differential hydraulic cylinder can be discharged into the oil tank of the hydraulic pimp through the oil path (4) and the oil path (2), a hydraulic system realizes the maximum exhaust, the product quality is improved, multiple exhaust is not required in production, the working hours are saved, the production efficiency is improved, and the production cost is saved.
Description
Technical field
The present invention relates to differential hydro cylinder exhaust mode field, specifically a kind of Novel exhaust process of differential hydraulic cylinder.
Background technique
Along with growth in the living standard, the travelling comfort of people's counterweight truck has proposed more and more higher requirement, and the means of fixation that makes operator cabin is from original fixed half present floated, the full suspension type that develops into.The operator cabin of half floated, full suspension type, in the time of Vehicular vibration, can produce impact force to the lifting hydraulic cylinder being attached thereto, especially produce larger impact force downwards, to lifting hydraulic cylinder transmission, may cause piston rod seal component, piston rod, the distortion of cylinder bucket Sealing, produce internal leakage and outward leakage, when serious, can cause piston rod bending.Therefore the lifting hydraulic cylinder of operator cabin uses the differential hydro cylinder (as Fig. 1) with self-protecting function more, and described differential hydro cylinder comprises not expander section rod chamber 1, expander section rodless cavity 2, piston rod 3, piston 4.When operator cabin is in lock position when (being the cavity region that piston 4 is positioned at expander section rodless cavity 2), the epicoele (the cavity region of piston upper surface) of differential hydro cylinder and cavity of resorption (the cavity region of piston lower surface) intercommunication, in the time that operator cabin Oscillation Amplitude is larger, piston rod 3 moves up and down, fluid in differential hydro cylinder can be interactive between epicoele and cavity of resorption, just can well alleviate the stress of piston assembly, when avoiding the generation of the distortion of the each component of differential hydro cylinder and internal leakage, outward leakage, can improve the travelling comfort of driving.
Described hydraulic system comprises differential hydro cylinder (as Fig. 1) and oil hydraulic pump (as the dotted line frame of Fig. 1).Can cause differential hydro cylinder low speed jerking motion if having air in differential hydro cylinder, oil hydraulic pump liquid level rises, and produces hydraulic pressure pumping hole oil spilling phenomenon.Therefore, main engine factory all will carry out exhaust to the hydraulic system being made up of oil hydraulic pump and differential hydro cylinder, the general technology of hydraulic system exhaust is: selector valve 5 switches to left side, oil hydraulic pump by oil circuit 1. 6 to oil circuit 3. 7, oil circuit 4. 9,5. 8 fuel feeding of oil circuit, epicoele and cavity of resorption oil-feed, because epicoele equates with the pressure of cavity of resorption, and cavity of resorption piston action area is greater than epicoele piston action area, piston 4, to epicoele one lateral movement, makes operator cabin lifting, and the air that Installed System Memory has is compressed into epicoele; In the time giving rise to range, selector valve 5 switches to the neutral position on left side, right side, epicoele and cavity of resorption stop oil-feed, epicoele and oil circuit 4. 9,2. 10 one-way conductions of oil circuit, 4. be the air that has in epicoele 9 discharges from oil circuit because of pressure, 2. 10 arrive fuel tanks 11 through oil circuit, cavity of resorption and oil circuit 3. between 7 by hydraulic control valve 13 one-way conductions (be cavity of resorption can only oil-feed can not oil return); Then, selector valve switches to right side, oil hydraulic pump by oil circuit 1. 6 to 4. 9 fuel feeding of oil circuit, 4. oil circuit 9 controls hydraulic control valve 13 by oil circuit control 12 simultaneously, make cavity of resorption pass through oil circuit 3. 7, oil circuit is 2. 10 to fuel tank 11 oil returns, piston rod 3 is to cavity of resorption one lateral movement, operator cabin declines; In the time that operator cabin drops to lock position, epicoele and cavity of resorption intercommunication, epicoele and cavity of resorption fluid can intercommunications.When operator cabin gives rise to range, in system, air is compressed into epicoele, in the time that switching to the neutral position on left side, right side, selector valve 5 discharges, portion gas can only be discharged to oil circuit 4. 9,2. 10 li of oil circuits, in the time that operator cabin declines, oil circuit 4. 9, oil circuit 2. the portion gas of 10 li get back to again epicoele, so general main engine factory all will be in the time of debugging repeatedly by operator cabin lifting, 3 to 4 circulations decline, while so both taking a lot of work, exhaust effect is also undesirable.
Summary of the invention
When the present invention takes a lot of work in order to solve existing exhaust process of differential hydraulic cylinder and the bad problem of effect, do not changing on the basis of oil hydraulic cylinder, hydraulic pump structure, a kind of Novel exhaust process of differential hydraulic cylinder is provided.
The present invention is achieved by the following technical solutions: a kind of Novel exhaust process of differential hydraulic cylinder, concrete technology step is: operator cabin is adjusted to lock position, selector valve is switched to the neutral position on left side, right side, 3. oil circuit is disconnected from oil hydraulic pump, 3. inject fluid to expander section rodless cavity from gap by oil circuit, until the oil circuit that fluid passes through with expander section rod chamber is not communicated with 4., 2. be drained into fuel tank by oil circuit, when fluid liquid level in fuel tank reaches requirement position, finish to inject, 3. oil circuit is connected with oil hydraulic pump.
The described position that requires is the liquid level position that requires a certain amount of fluid injecting according to oil hydraulic pump producer.The described position that requires is known to the skilled person general knowledge.
The design of exhaust air technique of the present invention is the neutral position that switches to left side, right side according to selector valve, epicoele and oil circuit 4., 2. one-way conduction of oil circuit, cavity of resorption and oil circuit 3. between by this feature of hydraulic control valve one-way conduction, and operator cabin is in the time of lock position, the feature of the epicoele of differential hydro cylinder and cavity of resorption intercommunication.
Technical thinking of the present invention is ingenious, make the air that has in differential hydro cylinder by oil circuit 4., 2. oil circuit be drained in the fuel tank of oil hydraulic pump, hydraulic system realizes exhaust and maximizes, promote quality of product, when production without repeatedly exhaust, save man-hour, improved manufacturing efficiency, saved cost of production.
Accompanying drawing explanation
Fig. 1 is the structural representation of oil hydraulic pump of the present invention and differential hydro cylinder.
In figure: 1-is expander section rod chamber not, 2-expander section rodless cavity, 3-piston rod, 4-piston, 5-selector valve, 6-oil circuit 1., 7-oil circuit 3., 8-oil circuit 5., 9-oil circuit 4., 10-oil circuit 2., 11-fuel tank, 12-oil circuit control, 13-hydraulic control valve.
Embodiment
A kind of Novel exhaust process of differential hydraulic cylinder, concrete technology step is: operator cabin is adjusted to lock position, selector valve 5 is switched to the neutral position on left side, right side, 3. oil circuit 7 is disconnected from oil hydraulic pump, 3. 7 injects fluid to expander section rodless cavity 2 from gap by oil circuit, until fluid through with oil circuit that expander section rod chamber 1 is not communicated with 4. 9,2. 10 be drained into fuel tank 11 by oil circuit, when fluid liquid level in fuel tank 11 reaches requirement position, finish to inject, 3. oil circuit 7 is connected with oil hydraulic pump.
When concrete enforcement, described from gap, by oil circuit, 3. 7 what inject to expander section rodless cavity 2 that the injection device of fluid adopts is filling device.
Claims (2)
1. a Novel exhaust process of differential hydraulic cylinder, it is characterized in that, concrete technology step is: operator cabin is adjusted to lock position, selector valve (5) is switched to left side, the neutral position on right side, by oil circuit 3. (7) disconnect from oil hydraulic pump, from gap by oil circuit 3. (7) to expander section rodless cavity (2) inject fluid, until 4. (9) of oil circuit that fluid passes through with expander section rod chamber (1) is not communicated with, by oil circuit 2. (10) be drained into fuel tank (11), when fluid liquid level in fuel tank (11) reaches requirement position, finish to inject, by oil circuit, 3. (7) and oil hydraulic pump connect.
2. a kind of Novel exhaust process of differential hydraulic cylinder according to claim 1, is characterized in that, described from gap, by oil circuit, 3. (7) inject to expander section rodless cavity (2) that the injection device of fluid adopts is filling device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210050364.1A CN102536969B (en) | 2012-03-01 | 2012-03-01 | Novel exhaust process of differential hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210050364.1A CN102536969B (en) | 2012-03-01 | 2012-03-01 | Novel exhaust process of differential hydraulic cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102536969A CN102536969A (en) | 2012-07-04 |
| CN102536969B true CN102536969B (en) | 2014-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210050364.1A Active CN102536969B (en) | 2012-03-01 | 2012-03-01 | Novel exhaust process of differential hydraulic cylinder |
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| Country | Link |
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| CN (1) | CN102536969B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6387304U (en) * | 1986-11-28 | 1988-06-07 | ||
| DE3935756A1 (en) * | 1989-10-27 | 1991-05-02 | Vdo Schindling | Hydraulic circuit for vehicle - with integral leakage path for automatic venting for secondary forward-reverse pump |
| JP2006207657A (en) * | 2005-01-26 | 2006-08-10 | Nanbu:Kk | Hydraulic cylinder with air vent function |
| CN101787993B (en) * | 2010-01-26 | 2012-07-11 | 云南省机械研究设计院 | Method for improving hydraulic transmission rigidity of hydraulic system |
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2012
- 2012-03-01 CN CN201210050364.1A patent/CN102536969B/en active Active
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| CN102536969A (en) | 2012-07-04 |
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Address after: 044000 No. 1, Airport Avenue, Yuncheng Airport Economic Development Zone, Shanxi, Yuncheng Patentee after: DANYUN AUTOMOBILE CO., LTD. Address before: 044000 Shanxi province Yuncheng City Airport Tongda Road No. 8 Patentee before: Shanxi Dayun Automobile Manufacture Company |