CN104512833A - Novel hydraulic system of shear-mode lifting platform - Google Patents
Novel hydraulic system of shear-mode lifting platform Download PDFInfo
- Publication number
- CN104512833A CN104512833A CN201410729949.5A CN201410729949A CN104512833A CN 104512833 A CN104512833 A CN 104512833A CN 201410729949 A CN201410729949 A CN 201410729949A CN 104512833 A CN104512833 A CN 104512833A
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- CN
- China
- Prior art keywords
- oil circuit
- oil
- way valve
- piston cylinder
- hydraulic system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
- B66F7/08—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement hydraulically or pneumatically operated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/28—Constructional details, e.g. end stops, pivoting supporting members, sliding runners adjustable to load dimensions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
Abstract
The invention discloses a novel hydraulic system of a shear-mode lifting platform. The novel hydraulic system of the shear-mode lifting platform comprises a hydraulic pump and a two-position four-way valve; the two-position four-way valve is connected with the first, second, third and fourth oil ways; the first oil way is connected with the hydraulic pump to form an oil inlet line; the second oil way is connected with an oil tank to form an oil return line; the third oil way is connected with a big cavity of a piston cylinder; the fourth oil way is connected with a small cavity of the piston cylinder; the third oil way, between the two-position four-way valve and the piston cylinder, is further provided with a hydraulic control one-way valve; and the control oil way of the hydraulic control one-way valve is connected with the fourth oil way. The novel hydraulic system of the shear-mode lifting platform has the characters that the piston rod cannot fall naturally while the oil way is broken and the sealing effect is stable because the small cavity of the piston cylinder is in the lubricant state, and has not the corresponding potential safety hazard.
Description
Technical field
The present invention relates to a kind of novel hydraulic system of scissors lift bench.
Background technology
Scissors lift bench is also called hydraulic jack or shearing type lifter, and it drives lifting by hydraulic efficiency pressure system, plays vital effect keeping in repair in particularly vehicle maintenance and repair maintenance.Shown in Figure 1, in conventional art, the hydraulic efficiency pressure system of scissors lift bench comprises Hydraulic Pump 1 ', at Hydraulic Pump 1 ' upper connection in-line 2 ', in-line 2 ' is provided with check valve 3 ', described in-line 2 ' is connected with the vat 41 ' of piston cylinder 4 ', in-line 2 ' is also connected with fuel-displaced branch road 5 ', fuel-displaced branch road 5 ' is provided with two one logical valves 6 ', when hydraulic pump works, fluid enters into vat 41 ' implementation platform through in-line 2 ' and hoists, when needs decline platform, open two one logical valves 6 ', fluid in vat 41 ' is back to oil cylinder from fuel-displaced branch road 5 ', but there are two defects in this one-way hydraulic system: first, when oil circuit breaks, piston rod can fall by nature, the second, owing to being in without oil condition in the loculus 42 ' of piston cylinder, unlubricated, heating seriously easily causes seal failure.These two defects belong to two potential safety hazards, for this reason, for eliminating this two potential safety hazards, are necessary improve the hydraulic efficiency pressure system of traditional scissors lift bench and optimize.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of novel hydraulic system of scissors lift bench, there is the piston rod when oil circuit breaks can not naturally fall, and piston cylinder loculus is in the stable feature of lubricating status sealing effectiveness, without corresponding potential safety hazard.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of novel hydraulic system of scissors lift bench, comprise Hydraulic Pump and two-position four-way valve, two-position four-way valve is connected with first, second, third and fourth oil circuit, wherein the first oil circuit and Hydraulic Pump connect and compose in-line, second oil circuit and fuel tank connect and compose oil return line, described 3rd oil circuit is connected with the large chamber of piston cylinder, 4th oil circuit is connected with the loculus of piston cylinder, 3rd oil circuit is also provided with hydraulic control one-way valve between two-position four-way valve and piston cylinder, and the oil circuit control of described hydraulic control one-way valve is communicated with described 4th oil circuit.
As the improvement of technique scheme, Hydraulic Pump is unidirectional quantitative hydraulic pump.
As the further improvement of technique scheme, described first oil circuit is provided with check valve.
Further, by pass valve is connected with between described first oil circuit, the second oil circuit.
Further, described first oil circuit is connected with shutoff valve.
The invention has the beneficial effects as follows: the present invention adopting said structure, by arranging hydraulic control one-way valve on the 3rd oil circuit connecting the large chamber of piston cylinder and two-position four-way valve, the 4th oil circuit that the oil circuit control of hydraulic control one-way valve is connected with same piston cylinder loculus and two-position four-way valve connects, when making hydraulic work system of the present invention, fuel charger work fluid enters the large chamber of piston cylinder by two-position four-way valve through hydraulic control one-way valve, implementation platform hoists, fluid now in loculus flows back to fuel tank through two-position four-way valve, decline to platform, manipulation two-position four-way valve enters the second bar position, make the oil-feed of piston cylinder loculus, oil circuit control opens hydraulic control one-way valve, the oil in large chamber is made to flow back to fuel tank, implementation platform declines, when inoperation hydraulic control one-way valve, oil in large chamber is by choke-out, thus can guarantee that platform safety is parked in a certain position, now if do not given loculus fuel feeding, then hydraulic control one-way valve is not opened, oil in large chamber is still just by choke-out, which achieves the safety of whole working process, well solve two potential safety hazards that conventional hydraulic is brought, there is structure simple, the features such as implementation cost is low, and safety is good.
Accompanying drawing explanation
Fig. 1 is conventional hydraulic constructional drawing;
Fig. 2 is hydraulic system structure figure of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further detailed explanation with enforcement.
With reference to Fig. 2, the novel hydraulic system of a kind of scissors lift bench of the present invention, comprise Hydraulic Pump 1 and two-position four-way valve 2, two-position four-way valve 2 is connected with first, two, three, four oil circuits 3, 4, 5, 6, wherein the first oil circuit 3 connects and composes in-line with Hydraulic Pump 1, second oil circuit 4 connects and composes oil return line with fuel tank, described 3rd oil circuit 5 is connected with the large chamber 71 of piston cylinder 7, 4th oil circuit 6 is connected with the loculus 72 of piston cylinder 7, 3rd oil circuit 5 is also provided with hydraulic control one-way valve 8 between two-position four-way valve 2 and piston cylinder 7, the oil circuit control 81 of described hydraulic control one-way valve 8 is communicated with described 4th oil circuit 6.
In the present embodiment, preferred Hydraulic Pump 1 is unidirectional quantitative hydraulic pump.
In the present embodiment, for avoiding the fluid in the first oil circuit 3 to reflux, check valve 31 can be provided with on described first oil circuit 3.
In order to avoid, oil liquid pressure is excessive to be impacted oil circuit, can be connected with by pass valve 9 between described first oil circuit 3, second oil circuit 4.
For making a Hydraulic Pump can for multiple system, shutoff valve 10 can be connected with on described first oil circuit, when the Hydraulic Pump in native system need to be connected with other system use time, other system is communicated with shutoff valve 10 place oil circuit, open shutoff valve simultaneously, convenient and swift, structure is simple.
Adopt the present invention of said structure, by arranging hydraulic control one-way valve 8 on the 3rd oil circuit 5 in the large chamber 71 and two-position four-way valve 2 that connect piston cylinder 7, the 4th oil circuit 6 that the oil circuit control 81 of hydraulic control one-way valve 8 is connected with same piston cylinder loculus 72 and two-position four-way valve 2 connects, when making hydraulic work system of the present invention, fuel charger 1 fluid that works enters the large chamber 71 of piston cylinder by two-position four-way valve 2 through hydraulic control one-way valve 8, implementation platform hoists, fluid now in loculus 72 flows back to fuel tank through two-position four-way valve 2, decline to platform, manipulation two-position four-way valve 2 enters the second bar position, make piston cylinder loculus 72 oil-feed, oil circuit control 81 opens hydraulic control one-way valve 8, the oil in large chamber 71 is made to flow back to fuel tank, implementation platform declines, when inoperation hydraulic control one-way valve 8, oil in large chamber 71 is by choke-out, thus can guarantee that platform safety is parked in a certain position, now if do not given loculus 72 fuel feeding, then hydraulic control one-way valve 8 is not opened, oil in large chamber 71 is still just by choke-out, which achieves the safety of whole working process, well solve two potential safety hazards that conventional hydraulic is brought, there is structure simple, the features such as implementation cost is low, and safety is good.
The above, just better embodiment of the present invention, but the present invention is not limited to above-described embodiment, as long as it reaches technique effect of the present invention with any same or similar means, all should fall within protection scope of the present invention.
Claims (5)
1. the novel hydraulic system of a scissors lift bench, it is characterized in that: comprise Hydraulic Pump and two-position four-way valve, two-position four-way valve is connected with first, second, third and fourth oil circuit, wherein the first oil circuit and Hydraulic Pump connect and compose in-line, second oil circuit and fuel tank connect and compose oil return line, described 3rd oil circuit is connected with the large chamber of piston cylinder, 4th oil circuit is connected with the loculus of piston cylinder, 3rd oil circuit is also provided with hydraulic control one-way valve between two-position four-way valve and piston cylinder, and the oil circuit control of described hydraulic control one-way valve is communicated with described 4th oil circuit.
2. the novel hydraulic system of a kind of scissors lift bench according to claim 1, is characterized in that: Hydraulic Pump is unidirectional quantitative hydraulic pump.
3. the novel hydraulic system of a kind of scissors lift bench according to claim 2, is characterized in that: described first oil circuit is provided with check valve.
4. the novel hydraulic system of a kind of scissors lift bench according to claim 3, is characterized in that: be connected with by pass valve between described first oil circuit, the second oil circuit.
5. the novel hydraulic system of a kind of scissors lift bench according to claim arbitrary in claim 1 ~ 4, is characterized in that: described first oil circuit is connected with shutoff valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410729949.5A CN104512833A (en) | 2014-12-03 | 2014-12-03 | Novel hydraulic system of shear-mode lifting platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410729949.5A CN104512833A (en) | 2014-12-03 | 2014-12-03 | Novel hydraulic system of shear-mode lifting platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104512833A true CN104512833A (en) | 2015-04-15 |
Family
ID=52788761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410729949.5A Pending CN104512833A (en) | 2014-12-03 | 2014-12-03 | Novel hydraulic system of shear-mode lifting platform |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104512833A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107761660A (en) * | 2017-09-14 | 2018-03-06 | 上海新奥新能源技术有限公司 | A kind of retractable platform system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201686439U (en) * | 2010-05-28 | 2010-12-29 | 青岛中油通用机械有限公司 | Natural gas filling secondary station trailer jack-up device |
| CN203373114U (en) * | 2013-07-18 | 2014-01-01 | 广州市环境卫生机械设备厂 | Tube explosion resistant oil hydraulic circuit of vertical lifting mechanism |
| CN204324803U (en) * | 2014-12-03 | 2015-05-13 | 牛力机械制造有限公司 | A kind of novel hydraulic system of scissors lift bench |
-
2014
- 2014-12-03 CN CN201410729949.5A patent/CN104512833A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201686439U (en) * | 2010-05-28 | 2010-12-29 | 青岛中油通用机械有限公司 | Natural gas filling secondary station trailer jack-up device |
| CN203373114U (en) * | 2013-07-18 | 2014-01-01 | 广州市环境卫生机械设备厂 | Tube explosion resistant oil hydraulic circuit of vertical lifting mechanism |
| CN204324803U (en) * | 2014-12-03 | 2015-05-13 | 牛力机械制造有限公司 | A kind of novel hydraulic system of scissors lift bench |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107761660A (en) * | 2017-09-14 | 2018-03-06 | 上海新奥新能源技术有限公司 | A kind of retractable platform system |
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| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150415 |
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| RJ01 | Rejection of invention patent application after publication |