CN203946859U - A kind of lifting of scissor-type altitude job platform and down maneuver hydraulic efficiency pressure system - Google Patents
A kind of lifting of scissor-type altitude job platform and down maneuver hydraulic efficiency pressure system Download PDFInfo
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- CN203946859U CN203946859U CN201420279151.0U CN201420279151U CN203946859U CN 203946859 U CN203946859 U CN 203946859U CN 201420279151 U CN201420279151 U CN 201420279151U CN 203946859 U CN203946859 U CN 203946859U
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- check valve
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Abstract
The utility model discloses a kind of lifting and down maneuver hydraulic efficiency pressure system of scissor-type altitude job platform, the outlet of the 4th check valve (2) is connected with the outlet of described the first check valve (1), the rodless cavity of described lower elevating ram (5) is connected with the first by pass valve (4), and the outlet of described the first by pass valve (4) is connected with described oil return pipe (17); The import of the outlet of described the second check valve (12) and the import of the 3rd check valve (7), described the 4th check valve (2) is connected with described the second damping (11), the outlet of the 3rd described check valve (7) and described the second damping (11) are connected with the rodless cavity of described upper elevating ram (8), and the rodless cavity of described upper elevating ram (8) is connected with described oil return pipe (17) by described the second by pass valve (10).The utility model when platform down maneuver the oil suction of elevating ram rodless cavity easily, extend oil cylinder service life.
Description
Technical field
The utility model relates to a kind of scissor-type altitude job platform, particularly relates to a kind of lifting and down maneuver hydraulic efficiency pressure system of scissor-type altitude job platform.
Background technology
The common elevating ram rodless cavity of two elevating ram scissor aerial work platforms and rod chamber oil circuit all separate, when platform declines, elevating ram rodless cavity hydraulic oil is by oil-feed hydralic hose oil sump tank, rod chamber produce negative pressure by suction capacity from oil suction in hydraulic reservoir, because scissor-type aerial platform is vertical uplift and decline operating mode, lift height is higher larger from suction drag, suction capacity is poorer, cause elevating ram rod chamber to produce and inhale sky, sealing member is produced to the life-span that injury has also reduced oil cylinder simultaneously.When platform manual-operated emergent declines, need to use two emergent flexible axles to pull respectively the spool of upper and lower elevating ram, or because upper elevating ram internal diameter is excessive, manually pull emergent flexible axle, upper elevating ram rodless cavity can not overflow, the platform decline of can not meeting an urgent need.
Utility model content
Technical problem to be solved in the utility model be to provide a kind of platform when down maneuver the oil suction of elevating ram rodless cavity easily, the lifting and the down maneuver hydraulic efficiency pressure system that extend the scissor-type altitude job platform in oil cylinder service life.
In order to solve the problems of the technologies described above, the lifting of a kind of scissor-type altitude job platform that the utility model provides and down maneuver hydraulic efficiency pressure system, comprise pressure oil pipe, the first check valve, the second check valve, the manual solenoid directional control valve of 2/2-way, the first damping, lower elevating ram, the second damping, the second by pass valve, oil return pipe and upper elevating ram, the spool end of the described manual solenoid directional control valve of 2/2-way is connected with an emergent flexible axle, the outlet of the 4th check valve is connected with the outlet of described the first check valve, the rodless cavity of described lower elevating ram is connected with the first by pass valve, the outlet of the first described by pass valve is connected with described oil return pipe, the import of the outlet of the second described check valve and the import of the 3rd check valve, described the 4th check valve is connected with the second described damping, the outlet of the 3rd described check valve and the second described damping are connected with the rodless cavity of described upper elevating ram, and the rodless cavity of described upper elevating ram is connected with described oil return pipe by the second described by pass valve.
The outlet of the first described check valve is connected with overweight sensor.
The first described check valve, the 4th check valve, the manual solenoid directional control valve of 2/2-way and the first damping are integrated in the first valve piece.
The second described check valve, the 3rd check valve, the second damping and the second by pass valve are integrated in second valve piece.
The second described check valve, the 3rd check valve, the second damping and the second by pass valve are integrated in second valve piece.
The lifting of scissor-type altitude job platform and down maneuver hydraulic efficiency pressure system, comprise pressure oil pipe, lower elevating ram, oil return pipe and upper elevating ram, the outlet of described pressure oil pipe is parallel with the import of the first check valve and the second check valve, the outlet of the first described check valve is connected with the outlet of the 4th check valve with the rodless cavity of described lower elevating ram, the rodless cavity of described lower elevating ram is connected with the manual solenoid directional control valve of 2/2-way and first damping of series connection, the rodless cavity of described lower elevating ram is connected with the first by pass valve, the outlet of the first described damping and the first described by pass valve is connected with described oil return pipe, the rod chamber of described lower elevating ram is connected with described oil return pipe, the import of the second described check valve and the import of the 3rd check valve, described the 4th check valve is connected with the second damping, the outlet of the 3rd described check valve and the second described damping are connected with the rodless cavity of described upper elevating ram, the rodless cavity of described upper elevating ram is connected with described oil return pipe by the second by pass valve, and the rod chamber of described upper elevating ram is connected with described oil return pipe.
The spool end of the described manual solenoid directional control valve of 2/2-way is connected with an emergent flexible axle.
The outlet of the first described check valve is connected with overweight sensor.
Further, the first described check valve, the 4th check valve, the manual solenoid directional control valve of 2/2-way and the first damping are integrated in the first valve piece.
Further, the second described check valve, the 3rd check valve, the second damping and the second by pass valve are integrated in second valve piece.
Adopt lifting and the down maneuver hydraulic efficiency pressure system of the scissor-type altitude job platform of technique scheme, platform is when down maneuver, by the manual solenoid directional control valve of 2/2-way and the first damping, the rod chamber of lower elevating ram and rodless cavity are communicated with, the negative pressure that resistance that rodless cavity hydraulic oil out produces by pipeline and rod chamber are produced is directly pressed into the rod chamber of lower elevating ram, the rod chamber of upper elevating ram is directly drawn the fluid in oil return pipe, shortened greatly the oil suction distance of elevating ram, made elevating ram rod chamber be full of all the time hydraulic oil.Separately on increasing elevating ram internal diameter in the situation that, this hydraulic solution realizes manual-operated emergent decline function, by pulling the emergent flexible axle being connected with the manual solenoid directional control valve of 2/2-way that platform is declined.
Compared with prior art, the utility model has the advantage of: shortened the oil suction distance of elevating ram, made elevating ram rod chamber be full of all the time hydraulic oil, protected oil cylinder inner seal, thereby extended the service life of oil cylinder.Hydraulic oil reservoir is stored in cylinder rod chamber, can effectively reduce the volume of vehicle hydraulic fuel tank, thereby abdicate more space for layout and the convenient for maintaining of other components and parts, separately on increasing, elevating ram internal diameter in the situation that, use an emergent flexible axle to realize the emergent decline function of two elevating ram scissor-type altitude job platforms.
In sum, the utility model be a kind of platform when down maneuver the oil suction of elevating ram rodless cavity easily, the lifting and the down maneuver hydraulic efficiency pressure system that extend the scissor-type altitude job platform in oil cylinder service life.
Accompanying drawing explanation
Fig. 1 is the structural representation of prior art.
Fig. 2 is structural representation of the present utility model.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Referring to Fig. 1, existing scissor-type aerial platform vibration hydraulic system, comprises pressure oil pipe 16, the first check valve 1, overweight sensor 3, lower elevating ram 5, the manual solenoid directional control valve 6 of 2/2-way, upper elevating ram 8, fuel tank 9, the second by pass valve 10, the second damping 11, the second check valve 12, the first damping 13,2/2-way solenoid directional control valve 14.While playing platform raising action, pressure oil enters respectively the first check valve 1 and the second check valve 12, then enters respectively lower elevating ram 5 and upper elevating ram 8.While tying platform down maneuver, the manual solenoid directional control valve 6 of 2/2-way and 2/2-way solenoid directional control valve 14 all obtain electric, hydraulic oil enters oil return pipe 17 by two logical manual solenoid directional control valves 6 and 2/2-way solenoid directional control valve 14, rod chamber due to upper elevating ram 5 and lower elevating ram 8 all can produce negative pressure simultaneously, oil return pipe 17 part hydraulic oil are inhaled into upper and lower elevating ram rod chamber, remaining fluid force feed oil sump tank 9.When using manual-operated emergent decline function, manually pull the emergent flexible axle being connected with the manual solenoid directional control valve 6 of 2/2-way, the rodless cavity hydraulic oil of lower elevating ram 5 enters oil return pipe 17 by the manual solenoid directional control valve 6 of 2/2-way and the first damping 13, during due to platform, by deadweight, decline, the rodless cavity of upper elevating ram 8 now produces high pressure, hydraulic oil enters oil return pipe 17 by the second by pass valve 10 overflows, and in decline process, the rod chamber of upper elevating ram 8 and lower elevating ram 5 is full of fluid all the time.If the internal diameter of elevating ram 8 in increase, the pressure that platform deadweight produces cannot surpass the response pressure of the second by pass valve 10 all the time, and platform cannot be realized omnidistance manual-operated emergent decline function.If take, reduce the oil pressure relief of the second by pass valve 10, platform is played lifting action in rated load situation, and lift-off pressures has surpassed the settling pressure of the second by pass valve 10, cannot realize normal lifting function.
Referring to Fig. 2, the outlet of pressure oil pipe 16 is parallel with the import of the first check valve 1 and the second check valve 12, the outlet of the first check valve 1 is connected with the outlet of the 4th check valve 2 with the rodless cavity of lower elevating ram 5, the rodless cavity of lower elevating ram 5 is connected with the manual solenoid directional control valve 6 of 2/2-way and first damping 13 of series connection, the spool end of the manual solenoid directional control valve 6 of 2/2-way is connected with an emergent flexible axle, the rodless cavity of lower elevating ram 5 is connected with the first by pass valve 4, the outlet of the first damping 13 and the first by pass valve 4 is connected with oil return pipe 17, the rod chamber of lower elevating ram 5 is connected with oil return pipe 17, the outlet of the second check valve 12 with the import of the 3rd check valve 7, the import of the 4th check valve 2 be connected with the second damping 11, the outlet of the 3rd check valve 7 is connected with the rodless cavity of upper elevating ram 8 with the second damping 11, the rodless cavity of upper elevating ram 8 is connected with oil return pipe 17 by the second by pass valve 10, the rod chamber of upper elevating ram 8 is connected with oil return pipe 17, and oil return pipe 17 is connected with fuel tank 9.
Further, the outlet of the first check valve 1 is connected with the outlet of overweight sensor 3.
Further, the first check valve 1, the 4th check valve 2, the manual solenoid directional control valve 6 of 2/2-way and the first damping 13 are integrated in the first valve piece 15.
Further, the second check valve 12, the 3rd check valve 7, the second damping 11 and the second by pass valve 10 are integrated in second valve piece 18.
Referring to Fig. 2, the rodless cavity that CSE mouth and first check valve 1 of pressure oil pipe 16 by the first valve piece 15 enters lower elevating ram 5, the manual solenoid directional control valve 6 of 2/2-way is in normal position, the rod chamber hydraulic oil of lower elevating ram 5 is by the B mouth oil sump tank 9 of the first valve piece, the rodless cavity that simultaneously CSE mouth and second check valve 12, three check valve 7 of pressure oil by second valve piece 18 enters upper elevating ram 8, the rod chamber hydraulic oil of upper elevating ram 8 is by the B mouth oil sump tank 9 of second valve piece 18, and upper elevating ram 8 and lower elevating ram 5 have stretched out platform raising action simultaneously.Platform declines and relies on Action of Gravity Field, the manual solenoid directional control valve 6 of 2/2-way obtains electric, the rodless cavity hydraulic oil of lower elevating ram 5 enters oil return pipe 17 by the manual solenoid directional control valve 6 of 2/2-way and the first damping 13, this is the rod chamber generation negative pressure of elevating ram 5 at present, hydraulic oil in oil return pipe 17 is pressed into the rod chamber of lower elevating ram 5, the rodless cavity hydraulic oil of upper elevating ram 8 is by the second damping 11, the manual solenoid directional control valve 6 of the 4th check valve 2 and 2/2-way enters oil return pipe 17, the rod chamber of upper elevating ram 8 produces negative pressure, hydraulic oil in oil return pipe 17 is pressed into the rod chamber of elevating ram 8, upper elevating ram 8 and lower elevating ram 5 are retracted simultaneously, complete platform down maneuver.
The utility model can be used the scissor aerial work platform that uses two elevating rams, and this scheme guarantees that rodless cavity and the rod chamber of elevating ram are full of hydraulic oil all the time, is conducive to protect cylinder seal and prevents that oil cylinder inner surface from getting rusty, and extends oil cylinder service life.This system, also with manual-operated emergent decline function, when car load electric weight exhausts or when electrical control was lost efficacy, can manually pull emergent flexible axle that platform is declined.The manual solenoid directional control valve 6 of 2/2-way has and manually pulls spool function, and its spool end is threaded, and connects an emergent flexible axle.When manually pulling emergent flexible axle, the rodless cavity hydraulic oil of lower elevating ram 5 enters oil return pipe 17 by the manual solenoid directional control valve 6 of 2/2-way and the first damping 13, and the rodless cavity hydraulic oil of upper elevating ram 8 enters oil return pipe 17 by the second damping 11, the 4th check valve 2 and the manual solenoid directional control valve 6 of 2/2-way.This system has and prevents because of sebific duct platform moment function of falling of breaking, vehicle in the course of the work, if the sebific duct from the D mouth of the first valve piece 15 to the D mouth of second valve piece 18 causes leakage of oil herein because of destroyed, the hydraulic oil of now going up the rodless cavity of elevating ram 8 can flow out through the second damping 11, the fluid of the rodless cavity of lower elevating ram 5 enters oil return pipe 17 through the first by pass valve 4, now platform can slowly decline, consistent with normal descending speed.If the CSE mouth place sebific duct of the oil-feed of the first valve piece 15 and second valve piece 18 breaks, now upper and lower elevating ram all can keep motionless because spool pins, and platform can not fall.
Referring to Fig. 2, scissor-type aerial platform provided by the invention lifting and down maneuver hydraulic solution, normally decline, and by the manual solenoid directional control valve 6 of 2/2-way, obtains electric realization.Manual-operated emergent declines, and pulls the emergent flexible axle being connected with the manual solenoid directional control valve 6 of 2/2-way to realize.By the first valve piece 15 and second valve piece 18 are coupled together, the running of hydraulic power oil route of manual-operated emergent down maneuver and normal down maneuver is consistent.The advantage of having possessed original lifting decline hydraulic efficiency pressure system (seeing Fig. 1), at upper elevating ram 8, increase after internal diameter, unloaded in the situation that, realized manual-operated emergent decline function, guaranteed to cut fork platform simultaneously and can give rise to extreme higher position in rated load situation.
Claims (5)
1. the lifting of a scissor-type altitude job platform and down maneuver hydraulic efficiency pressure system, comprise pressure oil pipe (16), the first check valve (1), the second check valve (12), the manual solenoid directional control valve of 2/2-way (6), the first damping (13), lower elevating ram (5), the second damping (11), the second by pass valve (10), oil return pipe (17) and upper elevating ram (8), the spool end of the manual solenoid directional control valve of described 2/2-way (6) is connected with an emergent flexible axle, it is characterized in that: the outlet of the 4th check valve (2) is connected with the outlet of described the first check valve (1), the rodless cavity of described lower elevating ram (5) is connected with the first by pass valve (4), the outlet of described the first by pass valve (4) is connected with described oil return pipe (17), the import of the outlet of described the second check valve (12) and the import of the 3rd check valve (7), described the 4th check valve (2) is connected with described the second damping (11), the outlet of the 3rd described check valve (7) and described the second damping (11) are connected with the rodless cavity of described upper elevating ram (8), and the rodless cavity of described upper elevating ram (8) is connected with described oil return pipe (17) by described the second by pass valve (10).
2. the lifting of scissor-type altitude job platform according to claim 1 and down maneuver hydraulic efficiency pressure system, is characterized in that: the outlet of described the first check valve (1) is connected with overweight sensor (3).
3. the lifting of scissor-type altitude job platform according to claim 1 and 2 and down maneuver hydraulic efficiency pressure system, is characterized in that: described the first check valve (1), the 4th check valve (2), the manual solenoid directional control valve of 2/2-way (6) and the first damping (13) are integrated in the first valve piece (15).
4. the lifting of scissor-type altitude job platform according to claim 1 and 2 and down maneuver hydraulic efficiency pressure system, is characterized in that: described the second check valve (12), the 3rd check valve (7), the second damping (11) and the second by pass valve (10) are integrated in second valve piece (18).
5. the lifting of scissor-type altitude job platform according to claim 3 and down maneuver hydraulic efficiency pressure system, is characterized in that: described the second check valve (12), the 3rd check valve (7), the second damping (11) and the second by pass valve (10) are integrated in second valve piece (18).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420279151.0U CN203946859U (en) | 2014-05-28 | 2014-05-28 | A kind of lifting of scissor-type altitude job platform and down maneuver hydraulic efficiency pressure system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420279151.0U CN203946859U (en) | 2014-05-28 | 2014-05-28 | A kind of lifting of scissor-type altitude job platform and down maneuver hydraulic efficiency pressure system |
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| CN203946859U true CN203946859U (en) | 2014-11-19 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104098055A (en) * | 2014-05-28 | 2014-10-15 | 湖南星邦重工有限公司 | Lifting and descending hydraulic system of scissor fork type aerial lift vehicle platform |
| CN105114379A (en) * | 2015-09-30 | 2015-12-02 | 湖南星邦重工有限公司 | Lifting platform and hydraulic system thereof |
| CN106314137A (en) * | 2015-06-16 | 2017-01-11 | 徐工集团工程机械股份有限公司 | Walking brake control hydraulic system and shear-fork aerial work platform |
| CN106976825A (en) * | 2017-04-01 | 2017-07-25 | 浙江高宇液压机电有限公司 | Bypass the scissor aerial work platform hydraulic control system of off-load electromagnetic direct-drive |
| CN110510545A (en) * | 2018-11-22 | 2019-11-29 | 湖北江山重工有限责任公司 | A kind of heavy double crossing type lifting apparatus hydraulic synchronization control loops |
-
2014
- 2014-05-28 CN CN201420279151.0U patent/CN203946859U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104098055A (en) * | 2014-05-28 | 2014-10-15 | 湖南星邦重工有限公司 | Lifting and descending hydraulic system of scissor fork type aerial lift vehicle platform |
| CN106314137A (en) * | 2015-06-16 | 2017-01-11 | 徐工集团工程机械股份有限公司 | Walking brake control hydraulic system and shear-fork aerial work platform |
| CN106314137B (en) * | 2015-06-16 | 2019-07-23 | 徐工集团工程机械股份有限公司 | A kind of walking control for brake hydraulic system and scissor aerial work platform |
| CN105114379A (en) * | 2015-09-30 | 2015-12-02 | 湖南星邦重工有限公司 | Lifting platform and hydraulic system thereof |
| CN106976825A (en) * | 2017-04-01 | 2017-07-25 | 浙江高宇液压机电有限公司 | Bypass the scissor aerial work platform hydraulic control system of off-load electromagnetic direct-drive |
| CN110510545A (en) * | 2018-11-22 | 2019-11-29 | 湖北江山重工有限责任公司 | A kind of heavy double crossing type lifting apparatus hydraulic synchronization control loops |
| CN110510545B (en) * | 2018-11-22 | 2023-08-08 | 中国兵器工业集团江山重工研究院有限公司 | Hydraulic synchronous control loop for heavy double-scissor fork type lifting device |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141119 Termination date: 20160528 |
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| CF01 | Termination of patent right due to non-payment of annual fee |