CN105114379A - Lifting platform and hydraulic system thereof - Google Patents
Lifting platform and hydraulic system thereof Download PDFInfo
- Publication number
- CN105114379A CN105114379A CN201510639062.1A CN201510639062A CN105114379A CN 105114379 A CN105114379 A CN 105114379A CN 201510639062 A CN201510639062 A CN 201510639062A CN 105114379 A CN105114379 A CN 105114379A
- Authority
- CN
- China
- Prior art keywords
- valve
- elevating ram
- way
- communicated
- way valve
- 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.)
- Granted
Links
- 239000003921 oil Substances 0.000 claims abstract description 63
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 31
- 230000003028 elevating effect Effects 0.000 claims description 120
- 239000002828 fuel tank Substances 0.000 claims description 31
- 239000000945 filler Substances 0.000 claims description 13
- 238000004891 communication Methods 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 5
- 230000007246 mechanism Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 5
- 230000000630 rising effect Effects 0.000 abstract description 3
- 238000005336 cracking Methods 0.000 description 11
- 230000007423 decrease Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 230000005484 gravity Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Landscapes
- Forklifts And Lifting Vehicles (AREA)
Abstract
The invention discloses a hydraulic system of a lifting platform. The system comprises a hydraulic pump, an oil tank, a lower lifting oil cylinder, an upper lifting oil cylinder and an overflow valve, wherein a rodless cavity of the lower lifting oil cylinder is communicated with the oil tank through a first two-position two-way electromagnetic valve capable of being opened manually, a rodless cavity of the upper lifting oil cylinder is communicated with the hydraulic pump through a first one-way valve, and the first one-way valve allows hydraulic oil to flow to the rodless cavity of the upper lifting oil cylinder through the hydraulic pump; the overflow valve is connected with the first one-way valve in parallel, and both an inlet of the first one-way valve and an oil drainage port of the overflow valve are communicated with an inlet of the first two-position two-way electromagnetic valve. Due to the fact that the oil drainage port of the overflow valve is connected to an oil inlet circuit of the upper lifting oil cylinder and communicated with an oil outlet circuit of the rodless cavity of the lower lifting oil cylinder, rising and falling of the platform can be achieved as long as the opening pressure of the overflow valve is smaller than the minimum pressure in the upper lifting oil cylinder at the initial position of the platform, and repeated testing for determination is not needed. The invention further discloses a lifting platform comprising the hydraulic system.
Description
Technical field
The present invention relates to hydraulic lifting field, particularly relate to a kind of hydraulic system of lift platform.In addition, the invention still further relates to a kind of lift platform.
Background technique
Lift platform is broad-spectrum high-lift operation special device, and it is the flexible lifting realizing working platform being promoted supporting frame by hydraulic jack, thus reaches the object of high-lift operation.Particularly scissor-type lifting platform, its scissor mechanical structure, lift platform is hoisted higher stability, roomy working platform and higher bearing capacity make high-lift operation scope larger, and be applicable to many people operation simultaneously, make high-lift operation efficiency higher, safety more ensures, therefore applies more extensive.
For preventing system burst fault or power breakdown from causing working platform not decline in operation process, thus jeopardize human life's safety, so general aerial work platform is all configured with emergent descending system.When system malfunctions, only need ground staff to exert oneself one to draw emergent handle, supporting frame automatically will shrink and declines thus realize the decline of working platform.
Please refer to Fig. 1, Fig. 1 is the schematic diagram of a kind of scissor-type lifting platform hydraulic system of the prior art.It comprises the first one-way valve 101, second one-way valve 104, first throttle valve 102, second throttle 106, the first 2/2-way solenoid valve 103, second 2/2-way solenoid valve 107, relief valve 105, lower elevating ram 108, upper elevating ram 109 and the fuel tank 110 that can manually boot, relief valve 105 and the second 2/2-way solenoid valve 107, second throttle 106 are in parallel, and the drain tap of relief valve 105 is connected on going out on oil return line of elevating ram 109 rodless cavity.When system malfunctions can not be opened, ground staff pulls the spool of the first 2/2-way solenoid valve 103, the pressure that the lower elevating ram 108 of release is inner all, the weight of whole working platform is all carried on relief valve 105, thus the hydraulic oil in elevating ram 109 rodless cavity is built the pressure spilling.But the cracking pressure value of the relief valve 105 in this hydraulic system needs repeatedly to debug could be determined, because if design of pressure is too small, then enough large pressure cannot be formed to realize the lifting of working platform; If design of pressure is excessive, then after pulling the first 2/2-way solenoid valve 103, building the pressure of being formed in upper elevating ram 109 rodless cavity cannot make relief valve 105 overflow.And platform whole in the process of emergent decline on the pressure of elevating ram become U-shaped curve, therefore the cracking pressure of relief valve 105 also must need to be greater than the maximum value in platform raising process lower than the minimum value of U-shaped curve simultaneously.When oil pressure when working platform drops to certain altitude in upper elevating ram 109 rodless cavity is less than or equal to the cracking pressure of relief valve 105, relief valve 105 will cut out, and cause working platform not decline completely and put in place.
Therefore how making the cracking pressure value of relief valve not need repetition test to determine is the current technical issues that need to address of those skilled in the art.
Summary of the invention
The object of this invention is to provide a kind of hydraulic system of lift platform, the cracking pressure value of relief valve is easily determined.Another object of the present invention is to provide a kind of lift platform, and the cracking pressure value of relief valve is easily determined.
To achieve these goals, the invention provides a kind of hydraulic system of lift platform, comprise oil hydraulic pump, fuel tank, lower elevating ram, upper elevating ram and relief valve, the rod chamber of described lower elevating ram is all communicated with described fuel tank with the rod chamber of described upper elevating ram, the rodless cavity of described lower elevating ram is communicated with described oil hydraulic pump, the rodless cavity of described lower elevating ram passes through the first 2/2-way solenoid valve that can be manually opened and is communicated with described fuel tank, the rodless cavity of described upper elevating ram is communicated with described fuel tank by the second 2/2-way solenoid valve, the rodless cavity of described upper elevating ram is communicated with described oil hydraulic pump by the first one-way valve, described first one-way valve allows hydraulic oil to be flowed to the rodless cavity of described upper elevating ram by described oil hydraulic pump, also comprise the relief valve in parallel with described first one-way valve, and the entrance of described first one-way valve, the drain tap of described relief valve is all communicated with the entrance of described first 2/2-way solenoid valve.
Preferably, the rodless cavity of described lower elevating ram is communicated with described oil hydraulic pump by the second one-way valve, and described second one-way valve allows hydraulic oil to flow into the rodless cavity of described lower elevating ram by described oil hydraulic pump.
Preferably, the rodless cavity of described lower elevating ram is communicated with described first 2/2-way solenoid valve by the 3rd one-way valve, and described 3rd one-way valve allows hydraulic oil to flow to described first 2/2-way solenoid valve by the rodless cavity of described lower elevating ram.
Preferably, described hydraulic system also comprises the 4th one-way valve and the 5th one-way valve, the entrance of described 4th one-way valve is communicated with described oil hydraulic pump, the outlet of described 5th one-way valve is communicated with the entrance of the outlet of described 3rd one-way valve and described first 2/2-way solenoid valve, and the outlet of described 4th one-way valve is communicated with the entrance of described 5th one-way valve, the entrance of described first one-way valve and the drain tap of described relief valve.
Preferably, the entrance of described second one-way valve is communicated with the entrance of described 4th one-way valve, and the outlet of the rod chamber of described lower elevating ram, the outlet of described first 2/2-way solenoid valve and described second 2/2-way solenoid valve is all communicated with the rod chamber of described upper elevating ram.
Preferably, described hydraulic system also comprises first throttle valve and second throttle, one end of described first throttle valve and the outlet of described first 2/2-way solenoid valve, and the other end of described first throttle valve is communicated with described fuel tank; One end of described second throttle and the outlet of described second 2/2-way solenoid valve, the other end of described second throttle is communicated with described fuel tank.
Preferably, described second one-way valve, described 3rd one-way valve, described 4th one-way valve, described 5th one-way valve, described first throttle valve and described first 2/2-way solenoid valve integrated installation are in the first valve block, and described first one-way valve, described second throttle, described second 2/2-way solenoid valve and described relief valve integrated installation are in the second valve block.
Preferably, described first valve block is provided with the first filler opening and first interface, described second valve block is provided with the second filler opening, described oil hydraulic pump is by the described first valve block of described first filler opening access, and described second valve block is by the first valve block described in the pipeline communication between described first interface and described second filler opening.
The present invention also provides a kind of lift platform, comprises underframe, supporting frame, working platform, hydraulic system and electric control mechanism, and described hydraulic system is specially the hydraulic system described in above-mentioned any one.
Preferably, described lift platform is specially scissor-type lifting platform.
The hydraulic system of lift platform provided by the invention, when there is emergency condition, ground handling operator pulls the spool of the first 2/2-way solenoid valve, lower elevating ram circuit communication, due to elevating ram retraction under Action of Gravity Field, same because elevating ram internal pressure increases on Action of Gravity Field, the hydraulic oil in upper elevating ram rodless cavity builds the pressure spilling, upper elevating ram and lower elevating ram are retracted simultaneously, and aerial work platform declines.Drain tap due to relief valve is connected on the oil-feed loop of upper elevating ram, and the fuel-displaced circuit communication of the drain tap of relief valve and lower elevating ram rodless cavity, even if therefore the cracking pressure of relief valve is less than the oil pressure of lifting, when also can not cause lifting, relief valve off-load causes elevating ram to be lifted not, so go up the pressure minimum in elevating ram when the cracking pressure of relief valve only need be less than platform initial position, just can the lifting of implementation platform, do not need repetition test to determine.
Lift platform provided by the invention comprises above-mentioned hydraulic system, and because above-mentioned hydraulic system has above-mentioned technique effect, above-mentioned lift platform also should have same technique effect, introduces no longer in detail at this.
Accompanying drawing explanation
Fig. 1 is the hydraulic system connection diagram of a kind of lift platform of the prior art;
Fig. 2 is the hydraulic schematic diagram of a kind of embodiment of lift platform hydraulic system provided by the present invention.
Embodiment
Core of the present invention is to provide a kind of hydraulic system of lift platform, makes the cracking pressure value of relief valve not need repetition test to determine.
In order to make those skilled in the art person understand the present invention program better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to Fig. 2, Fig. 2 is the hydraulic schematic diagram of a kind of embodiment of lift platform hydraulic system provided by the present invention.
The hydraulic system of the lift platform that the specific embodiment of the invention provides, comprise oil hydraulic pump, fuel tank 209, lower elevating ram 210, upper elevating ram 211 and relief valve 207, the rod chamber of lower elevating ram 210 is all communicated with fuel tank 209 with the rod chamber of upper elevating ram 211, the rodless cavity of lower elevating ram 210 is communicated with oil hydraulic pump, the rodless cavity of lower elevating ram 210 is communicated with fuel tank 209 by the first 2/2-way solenoid valve 204 that can manually boot, the rodless cavity of upper elevating ram 211 is communicated with fuel tank 209 by the second 2/2-way solenoid valve 208, the rodless cavity of upper elevating ram 211 is communicated with oil hydraulic pump by the first one-way valve 206, first one-way valve 206 allows hydraulic oil to flow to the rodless cavity of upper elevating ram 211 by oil hydraulic pump, relief valve 207 is in parallel with the first one-way valve 206, and the entrance of the first one-way valve 206, the drain tap of relief valve 207 is all communicated with the entrance of the first 2/2-way solenoid valve 204.
The rodless cavity of upper elevating ram 211 is communicated with oil hydraulic pump by the first one-way valve 206, first one-way valve 206 allows hydraulic oil to flow to the rodless cavity of upper elevating ram 211 by oil hydraulic pump, the i.e. entrance connecting fluid press pump of the first one-way valve 206, the outlet of the first one-way valve 206 connects the rodless cavity of upper elevating ram 211, relief valve 207 is in parallel with the first one-way valve 206, and the entrance of the first one-way valve 206, the drain tap of relief valve 207 is all communicated with the entrance of the first 2/2-way solenoid valve 204, namely relief valve 207 is connected in parallel on the oil-feed loop of elevating ram, pipeline between first one-way valve 206 to oil hydraulic pump and the pipeline connection between lower elevating ram 210 rodless cavity to the first 2/2-way solenoid valve 204, make the hydraulic oil in elevating ram 211 rodless cavity can by relief valve 207, first 2/2-way solenoid valve 204 flows out, and ensure that and upper elevating ram 211 will be caused can not lift because of relief valve during lifting 207 off-load.
When system malfunctions or electricity exhaust lift platform can not normally decline time, ground handling operator pulls the spool of the first 2/2-way solenoid valve 204, lower elevating ram 210 circuit communication, discharge the pressure that lower elevating ram 210 is inner all, because elevating ram under Action of Gravity Field 210 bounces back, the rod chamber oil suction of lower elevating ram 210, rodless cavity fluid is flowed out by the first 2/2-way solenoid valve 204; The weight that now whole platform upper divides all is carried on elevating ram 211, the rodless cavity internal pressure of upper elevating ram 211 increases, because the second two 2/2-way solenoid valves 208 are not opened, formed normally closed, hydraulic oil in upper elevating ram 211 rodless cavity builds the pressure, relief valve 207 valve port is forced to be opened, hydraulic oil is flowed out eventually through the first 2/2-way solenoid valve 204 by relief valve 207, first one-way valve 206, upper elevating ram 211 and lower elevating ram 210 are retracted simultaneously, thus aerial work platform declines.Drain tap due to relief valve 207 is connected on the oil-feed loop of upper elevating ram 211, and the fuel-displaced circuit communication of the drain tap of relief valve 207 and lower elevating ram 210 rodless cavity, even if therefore the cracking pressure of relief valve 207 is less than the oil pressure of lifting, when also can not cause lifting, relief valve 207 off-load causes elevating ram 211 can not lifted, so the cracking pressure value of relief valve 207 does not need repetition test to determine, when only need be less than working platform initial position, go up the minimum pressure values in elevating ram 211.
In the hydraulic system of the lift platform provided in the specific embodiment of the invention, the rodless cavity of lower elevating ram 210 can be communicated with oil hydraulic pump by the second one-way valve 201, second one-way valve 201 allows hydraulic oil to flow into the rodless cavity of lower elevating ram 210 by oil hydraulic pump, namely the entrance of the second one-way valve 201 is connected with oil hydraulic pump, and the outlet of the second one-way valve 201 is connected with the rodless cavity of lower elevating ram 210; The rodless cavity of lower elevating ram 210 can be communicated with the first 2/2-way solenoid valve 204 by the 3rd one-way valve 202, and the 3rd one-way valve 202 allows hydraulic oil to flow to the first 2/2-way solenoid valve 204 by the rodless cavity of lower elevating ram 210.
The hydraulic system of the lift platform that the specific embodiment of the invention provides can also comprise the 4th one-way valve 203 and the 5th one-way valve 205, the entrance of the 4th one-way valve 203 is connected with oil hydraulic pump, the outlet of the 5th one-way valve 205 is connected with the entrance of the outlet of the 3rd one-way valve 202 and the first 2/2-way solenoid valve 204, and the outlet of the 4th one-way valve 203 is communicated with the entrance of the 5th one-way valve 205, the entrance of the first one-way valve 206, the drain tap of relief valve 207.
Like this when lift platform rises, power is provided by oil hydraulic pump, the rodless cavity of elevating ram 210 under second one-way valve 201 makes hydraulic oil unidirectionally be flowed to by oil hydraulic pump, 4th one-way valve 203 makes hydraulic oil unidirectionally can only be flowed to the rodless cavity going up elevating ram 211 by oil hydraulic pump, second one-way valve 201 and the 4th one-way valve 203 can prevent hydraulic oil to be back to oil hydraulic pump, prevent the unexpected rising because of system pressure from damaging oil hydraulic pump; When lift platform declines, lower elevating ram 210 and upper elevating ram 211 bounce back, hydraulic oil in lower elevating ram 210 rodless cavity and upper elevating ram 211 rodless cavity flows out, second one-way valve 201 and the 4th one-way valve 203 prevent hydraulic oil to be back to oil hydraulic pump, and the 5th one-way valve 205 ensures that the hydraulic oil in lower elevating ram 210 rodless cavity can only flow into fuel tank 209 by the 3rd one-way valve 202, first 2/2-way solenoid valve 204; When the emergent decline of lift platform, second 2/2-way solenoid valve 208 closes, and the first one-way valve 206, the 3rd one-way valve 202, the 4th one-way valve 203 and the 5th one-way valve 205 ensure that the hydraulic oil in upper elevating ram 211 rodless cavity can only flow into fuel tank 209 by relief valve 207, the 5th one-way valve 205 eventually through the first 2/2-way solenoid valve 204 successively.
In the hydraulic system of the lift platform provided in the specific embodiment of the invention, the entrance of the entrance of the second one-way valve 201 with the 4th one-way valve 203 can be communicated with, form a pipeline and access oil hydraulic pump again; The outlet of the outlet of the rod chamber of lower elevating ram 210, the first 2/2-way solenoid valve 204, the second 2/2-way solenoid valve 208 can also be communicated with the rod chamber of upper elevating ram 211, form a pipeline and access fuel tank again.Whole like this hydraulic system only needs an oil hydraulic pump and a fuel tank, effectively can also shorten pipeline, saves cost.
On the basis of above-mentioned each embodiment, the hydraulic system of the lift platform that the specific embodiment of the invention provides can also comprise first throttle valve 213 and second throttle 214, one end of first throttle valve 213 and the outlet of the first 2/2-way solenoid valve 204, the other end of first throttle valve 213 is communicated with fuel tank 209; One end of second throttle 214 and the outlet of the second 2/2-way solenoid valve 208, the other end of second throttle 214 is communicated with fuel tank 209.Namely go out at lower elevating ram 210 and upper elevating ram 211 oil return line connects respectively first throttle valve 213 and second throttle 214, throttle valve can the flow of hydraulic control oil, by regulating throttle valve that decline process can be made more steady when lift platform declines.
In the hydraulic system of the lift platform provided in the specific embodiment of the invention, hydraulic pipe line is more, the overall structure connected to make hydraulic pipe line is simply compact, reduce manufacture cost, improve precision and reliability, facilitate I&M, can the second one-way valve 201, 3rd one-way valve 202, 4th one-way valve 203, 5th one-way valve 205, first throttle valve 213 and the first 2/2-way solenoid valve 204 are integrated in the first valve block 21, the first one-way valve 206, second throttle 214, second 2/2-way solenoid valve 208 and relief valve 207 are integrated in the second valve block 22.Namely first valve block 21 descends lifting valve block, and namely the second valve block 22 goes up lifting valve block.
On the basis of above-mentioned embodiment, the conveniently connection of each valve interblock pipeline or each component in hydraulic system, simplify design and the installation of hydraulic system, as shown in Figure 2, first filler opening E1 and first interface D1 can also be set on the correct position of the first valve block 21, the correct position of the second valve block 22 arranges the second filler opening E2, oil hydraulic pump accesses the first valve block 21, second valve block 22 by the pipeline communication first valve block 21 between first interface D1 and the second filler opening E2 by the first filler opening E1.
In addition can also the second interface A1, the 3rd interface B1 and the 4th interface C1 be set on the correct position of the first valve block 21, the correct position of the second valve block 22 arranges the 5th interface A2, the 6th interface B2 and the 7th interface C2.The rodless cavity of lower elevating ram 210 accesses the first valve block 21 by the second interface A1, and the rod chamber of lower elevating ram 210 accesses the first valve block 21 by the 3rd interface B1, and fuel tank 209 accesses the first valve block 21 by the 4th interface C1; The rodless cavity of upper elevating ram 211 accesses the second valve block 22 by the 5th interface A2, and the rod chamber of upper elevating ram 211 accesses the second valve block 22 by the 6th interface B2, and fuel tank 209 accesses the second valve block 22 by the 7th interface C2.
The lift platform provided in order to the better Comprehension and Implementation specific embodiment of the invention and the hydraulic system of lift platform, below in conjunction with Fig. 2, the workflow of the lift platform that the concrete general introduction specific embodiment of the invention provides and hydraulic system thereof:
Wherein lift platform is generally made up of underframe, supporting frame, working platform, hydraulic system and electric control mechanism, is promoted the flexible lifting realizing working platform of supporting frame, thus reach the object of high-lift operation by hydraulic jack.
When lift platform rises, open oil hydraulic pump, first 2/2-way solenoid valve 204 and the second 2/2-way solenoid valve 208 valve port are kept closed, hydraulic oil enters in the first valve block 21 by oil hydraulic pump from the E1 filler opening the first valve block 21, then two-way is divided into, second one-way valve 201 of leading up to flows out from A1 mouth, then flows into the rodless cavity of lower elevating ram 210; One-way valve 203 of separately leading up to flows out from the D1 mouth the first valve block 21, then enters the E2 mouth on the second valve block 22, then is flowed out the rodless cavity entering upper elevating ram 211 from A2 mouth by the first one-way valve 206.Lower elevating ram 210 and upper elevating ram 211 stretch out promotion supporting frame simultaneously and open, thus realize the rising of working platform.
When lift platform normally declines, first 2/2-way solenoid valve 204 and the second 2/2-way solenoid valve 208 simultaneously electric, spool is opened, and on the gravity compressed of working platform and scissor yoke, elevating ram 211 and lower elevating ram 210 bounce back, cause the rodless cavity oil extraction of oil cylinder, rod chamber oil suction.Hydraulic oil enters the first valve block 21 from fuel tank 209 by C1 mouth, then is flowed out the rod chamber entering lower elevating ram 210 by B1 mouth; Equally, hydraulic oil enters the second valve block 22 from fuel tank 209 by C2 mouth, then is flowed out the rod chamber entering upper elevating ram 211 by B2 mouth.Hydraulic oil in lower elevating ram 210 rodless cavity enters the first valve block 21 by A1 mouth, then is flowed out from C1 mouth by the 3rd one-way valve 202, first 2/2-way solenoid valve 204 and first throttle valve 213 successively, flows into fuel tank 209; Equally, hydraulic oil in upper elevating ram 211 rodless cavity enters the second valve block 22 by A2 mouth, flowed out from C2 mouth by the second 2/2-way solenoid valve 208 and second throttle 214 successively again, flow into fuel tank 209, lower elevating ram 210 and upper elevating ram 211 are retracted simultaneously, promotion supporting frame closes, thus realizes the decline of working platform.
When lift platform break down or have a power failure cause lift platform not decline time, operator manually pull the spool of the first 2/2-way solenoid valve 204, lower elevating ram 210 circuit communication, discharge the pressure that lower elevating ram 210 is inner all, because elevating ram under Action of Gravity Field 210 bounces back, the rod chamber oil suction of lower elevating ram 210, in the rodless cavity of lower elevating ram 210, hydraulic oil is flowed out by the 3rd one-way valve 202, first 2/2-way solenoid valve 204 and first throttle valve 213 successively, flows into fuel tank 209, the weight that now whole platform upper divides all is carried on elevating ram 211, the rodless cavity internal pressure of upper elevating ram 211 increases, because the second two 2/2-way solenoid valves 208 are not opened, hydraulic oil in upper elevating ram 211 rodless cavity builds the pressure, relief valve 207 valve port is forced to be opened, hydraulic oil flows out the second valve block 22 by relief valve 207 from E2 mouth, then the first valve block 21 is entered from D1 mouth, again successively by the 5th one-way valve 205, first 2/2-way solenoid valve 204 and first throttle valve 213 flow out from C1 mouth, flow into fuel tank 209, upper elevating ram 211 and lower elevating ram 210 are retracted simultaneously, thus aerial work platform declines.
Except the hydraulic system of above-mentioned lift platform, the specific embodiment of the present invention also provides a kind of lift platform comprising above-mentioned hydraulic system, the structure of these other each several parts of lift platform please refer to prior art as underframe, supporting frame, working platform, electric control system etc., repeats no more herein.
Particularly, above-mentioned lift platform can be scissor-type lifting platform.
Above lift platform provided by the present invention and hydraulic system thereof are described in detail.Apply specific case herein to set forth principle of the present invention and mode of execution, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (10)
1. the hydraulic system of a lift platform, comprise oil hydraulic pump, fuel tank (209), lower elevating ram (210), upper elevating ram (211) and relief valve (207), the rod chamber of described lower elevating ram (210) is all communicated with described fuel tank (209) with the rod chamber of described upper elevating ram (211), the rodless cavity of described lower elevating ram (210) is communicated with described oil hydraulic pump, the rodless cavity of described lower elevating ram (210) passes through the first 2/2-way solenoid valve (204) that can be manually opened and is communicated with described fuel tank (209), the rodless cavity of described upper elevating ram (211) is communicated with described fuel tank (209) by the second 2/2-way solenoid valve (208), it is characterized in that, the rodless cavity of described upper elevating ram (211) is communicated with described oil hydraulic pump by the first one-way valve (206), described first one-way valve (206) allows hydraulic oil to be flowed to the rodless cavity of described upper elevating ram (211) by described oil hydraulic pump, also comprise the relief valve (207) in parallel with described first one-way valve (206), and the entrance of described first one-way valve (206), the drain tap of described relief valve (207) is all communicated with the entrance of described first 2/2-way solenoid valve (204).
2. the hydraulic system of lift platform according to claim 1, it is characterized in that, the rodless cavity of described lower elevating ram (210) is communicated with described oil hydraulic pump by the second one-way valve (201), and described second one-way valve (201) allows hydraulic oil to flow into the rodless cavity of described lower elevating ram (210) by described oil hydraulic pump.
3. the hydraulic system of lift platform according to claim 2, the rodless cavity of described lower elevating ram (210) is communicated with described first 2/2-way solenoid valve (204) by the 3rd one-way valve (202), and described 3rd one-way valve (202) allows hydraulic oil to flow to described first 2/2-way solenoid valve (204) by the rodless cavity of described lower elevating ram (210).
4. the hydraulic system of lift platform according to claim 3, it is characterized in that, described hydraulic system also comprises the 4th one-way valve (203) and the 5th one-way valve (205), the entrance of described 4th one-way valve (203) is communicated with described oil hydraulic pump, the outlet of described 5th one-way valve (205) is communicated with the entrance of the outlet of described 3rd one-way valve (202) and described first 2/2-way solenoid valve (204), the outlet of described 4th one-way valve (203) and the entrance of described 5th one-way valve (205), the entrance of described first one-way valve (206) and the drain tap of described relief valve (207) are communicated with.
5. the hydraulic system of lift platform according to claim 4, it is characterized in that, the entrance of described second one-way valve (201) is communicated with the entrance of described 4th one-way valve (203), and the outlet of the rod chamber of described lower elevating ram (210), the outlet of described first 2/2-way solenoid valve (204) and described second 2/2-way solenoid valve (208) is all communicated with the rod chamber of described upper elevating ram (211).
6. the hydraulic system of lift platform according to claim 5, it is characterized in that, described hydraulic system also comprises first throttle valve (213) and second throttle (214), one end of described first throttle valve (213) and the outlet of described first 2/2-way solenoid valve (204), the other end of described first throttle valve (213) is communicated with described fuel tank (209); One end of described second throttle (214) and the outlet of described second 2/2-way solenoid valve (208), the other end of described second throttle (214) is communicated with described fuel tank (209).
7. the hydraulic system of lift platform according to claim 6, it is characterized in that, described second one-way valve (201), described 3rd one-way valve (202), described 4th one-way valve (203), described 5th one-way valve (205), described first throttle valve (213) and described first 2/2-way solenoid valve (204) integrated installation are in the first valve block (21), described first one-way valve (206), described second throttle (214), described second 2/2-way solenoid valve (208) and described relief valve (207) integrated installation are in the second valve block (22).
8. the hydraulic system of lift platform according to claim 7, it is characterized in that, described first valve block (21) is provided with the first filler opening (E1) and first interface (D1), described second valve block (22) is provided with the second filler opening (E2), described oil hydraulic pump accesses described first valve block (21) by described first filler opening (E1), and described second valve block (22) is by the first valve block (21) described in the pipeline communication between described first interface (E1) and described second filler opening (E2).
9. a lift platform, comprises underframe, supporting frame, working platform, hydraulic system and electric control mechanism, it is characterized in that, described hydraulic system is the lift platform hydraulic system described in claim 1 to 8 any one.
10. lift platform according to claim 9, is characterized in that, described lift platform is specially scissor-type lifting platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510639062.1A CN105114379B (en) | 2015-09-30 | 2015-09-30 | Lifting platform and hydraulic system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510639062.1A CN105114379B (en) | 2015-09-30 | 2015-09-30 | Lifting platform and hydraulic system thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105114379A true CN105114379A (en) | 2015-12-02 |
| CN105114379B CN105114379B (en) | 2017-05-10 |
Family
ID=54662451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510639062.1A Active CN105114379B (en) | 2015-09-30 | 2015-09-30 | Lifting platform and hydraulic system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105114379B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112357850A (en) * | 2020-09-01 | 2021-02-12 | 山东华龙农业装备股份有限公司 | Lifting mechanism of electric scissor maintenance operation device |
| CN113417904A (en) * | 2021-07-15 | 2021-09-21 | 福建庄金科技有限公司 | Multi-inclined strut hydraulic balance control method for pile machine |
| CN114352590A (en) * | 2022-01-13 | 2022-04-15 | 四川鼎鸿智电装备科技有限公司 | Double-cylinder hydraulic mechanism and pressure equipment |
| CN114483718A (en) * | 2022-04-15 | 2022-05-13 | 临工集团济南重机有限公司 | Load weighing method for aerial work platform and aerial work platform |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438037A (en) * | 2013-08-06 | 2013-12-11 | 湖南星邦重工有限公司 | Lifting and dropping action hydraulic system for scissor type aerial working trolley platforms |
| CN203474395U (en) * | 2013-08-06 | 2014-03-12 | 湖南星邦重工有限公司 | Scissor-type high-altitude working vehicle walking hydraulic system |
| CN203476862U (en) * | 2013-08-06 | 2014-03-12 | 湖南星邦重工有限公司 | Scissor-type high-altitude working vehicle platform rising and falling movement hydraulic system |
| CN103693592A (en) * | 2013-08-06 | 2014-04-02 | 湖南星邦重工有限公司 | Walking hydraulic system for scissor-type overhead working truck |
| 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 |
| CN203946859U (en) * | 2014-05-28 | 2014-11-19 | 湖南星邦重工有限公司 | A kind of lifting of scissor-type altitude job platform and down maneuver hydraulic efficiency pressure system |
| CN205047554U (en) * | 2015-09-30 | 2016-02-24 | 湖南星邦重工有限公司 | Lift platform and hydraulic system thereof |
-
2015
- 2015-09-30 CN CN201510639062.1A patent/CN105114379B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438037A (en) * | 2013-08-06 | 2013-12-11 | 湖南星邦重工有限公司 | Lifting and dropping action hydraulic system for scissor type aerial working trolley platforms |
| CN203474395U (en) * | 2013-08-06 | 2014-03-12 | 湖南星邦重工有限公司 | Scissor-type high-altitude working vehicle walking hydraulic system |
| CN203476862U (en) * | 2013-08-06 | 2014-03-12 | 湖南星邦重工有限公司 | Scissor-type high-altitude working vehicle platform rising and falling movement hydraulic system |
| CN103693592A (en) * | 2013-08-06 | 2014-04-02 | 湖南星邦重工有限公司 | Walking hydraulic system for scissor-type overhead working truck |
| 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 |
| CN203946859U (en) * | 2014-05-28 | 2014-11-19 | 湖南星邦重工有限公司 | A kind of lifting of scissor-type altitude job platform and down maneuver hydraulic efficiency pressure system |
| CN205047554U (en) * | 2015-09-30 | 2016-02-24 | 湖南星邦重工有限公司 | Lift platform and hydraulic system thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112357850A (en) * | 2020-09-01 | 2021-02-12 | 山东华龙农业装备股份有限公司 | Lifting mechanism of electric scissor maintenance operation device |
| CN112357850B (en) * | 2020-09-01 | 2022-08-23 | 山东华龙农业装备股份有限公司 | Lifting mechanism of electric scissor maintenance operation device |
| CN113417904A (en) * | 2021-07-15 | 2021-09-21 | 福建庄金科技有限公司 | Multi-inclined strut hydraulic balance control method for pile machine |
| CN113417904B (en) * | 2021-07-15 | 2024-02-27 | 福建庄金科技有限公司 | Multi-diagonal bracing hydraulic balance control method for pile machine |
| CN114352590A (en) * | 2022-01-13 | 2022-04-15 | 四川鼎鸿智电装备科技有限公司 | Double-cylinder hydraulic mechanism and pressure equipment |
| CN114483718A (en) * | 2022-04-15 | 2022-05-13 | 临工集团济南重机有限公司 | Load weighing method for aerial work platform and aerial work platform |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105114379B (en) | 2017-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205047554U (en) | Lift platform and hydraulic system thereof | |
| CN105114379A (en) | Lifting platform and hydraulic system thereof | |
| CN206874583U (en) | A kind of aerial work platform hydraulic energy-saving system | |
| CN206872378U (en) | A kind of aerial work platform hydraulic energy-saving system with no-load protection | |
| CN103438037B (en) | A kind of scissors type altitude job platform lifting and down maneuver hydraulic system | |
| CN204226308U (en) | A kind of ultrahigh-pressure hydraulic pressurization system | |
| CN101537984B (en) | Hoist motor closed type hydraulic system for preventing pipelines from bursting and control method thereof | |
| CN203946859U (en) | A kind of lifting of scissor-type altitude job platform and down maneuver hydraulic efficiency pressure system | |
| CN202883539U (en) | Lifting plunger cylinder structure of boarding bridge | |
| CN105298951B (en) | A kind of aerial work platform and its changing-breadth system | |
| CN202414994U (en) | Hang-up buffering oil line for turning device of crane | |
| CN107720642A (en) | Aerial work platform receives arm-type valve group automatically | |
| CN203476862U (en) | Scissor-type high-altitude working vehicle platform rising and falling movement hydraulic system | |
| CN208793342U (en) | A kind of elevator balance valve group and hydraulic system | |
| CN104098055B (en) | A kind of lifting of scissor-type altitude job platform and down maneuver hydraulic efficiency pressure system | |
| CN203176040U (en) | Oil circuit integration block for dual-drive hydraulic pump station | |
| CN103663152B (en) | Mast rising-falling control system, method and apparatus, super-lift apparatus and crane | |
| CN104692254B (en) | Crane secondary ascension downslide prevention system | |
| CN203373114U (en) | Tube explosion resistant oil hydraulic circuit of vertical lifting mechanism | |
| CN107830000A (en) | Stacker-reclaimer pitching hydraulic system | |
| CN201433066Y (en) | Pipeline crack prevention closed type hydraulic system of winding motor | |
| CN209925479U (en) | Pressure maintaining loop structure for normally closed hydraulic brake | |
| CN203497996U (en) | Pneumatic hydraulic jack | |
| CN107477041B (en) | Lifting oil cylinder valve block of scissor lifting platform | |
| CN102996565A (en) | Lifting plunger type cylinder structure of boarding bridge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 410600, 128, Jinzhou Avenue East, Jinzhou new district, Changsha, Hunan, Ningxiang Patentee after: Hunan Xingbang Intelligent Equipment Co.,Ltd. Address before: 410600, 128, Jinzhou Avenue East, Jinzhou new district, Changsha, Hunan, Ningxiang Patentee before: HUNAN SINOBOOM HEAVY INDUSTRY Co.,Ltd. |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A lifting platform and its hydraulic system Effective date of registration: 20220112 Granted publication date: 20170510 Pledgee: Agricultural Bank of China Limited Ningxiang sub branch Pledgor: Hunan Xingbang Intelligent Equipment Co.,Ltd. Registration number: Y2022430000002 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20231110 Granted publication date: 20170510 Pledgee: Agricultural Bank of China Limited Ningxiang sub branch Pledgor: Hunan Xingbang Intelligent Equipment Co.,Ltd. Registration number: Y2022430000002 |