CN107061388B - It is a kind of to prevent descending from shaking and turning to the lifting working platform Ye Qu mechanisms being emptied - Google Patents
It is a kind of to prevent descending from shaking and turning to the lifting working platform Ye Qu mechanisms being emptied Download PDFInfo
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- CN107061388B CN107061388B CN201710224491.1A CN201710224491A CN107061388B CN 107061388 B CN107061388 B CN 107061388B CN 201710224491 A CN201710224491 A CN 201710224491A CN 107061388 B CN107061388 B CN 107061388B
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- Prior art keywords
- valve
- oil
- oil outlet
- oil inlet
- way solenoid
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Classifications
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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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- 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
- F15B13/021—Valves for interconnecting the fluid chambers of an actuator
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20538—Type of pump constant capacity
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
Prevent descending from shaking and turning to the lifting working platform Ye Qu mechanisms being emptied the present invention relates to a kind of.This prevents descending from shaking and turning to the lifting working platform Ye Qu mechanisms being emptied, oil pump including fuel tank, connection fuel tank, first overflow valve is connected with the oil inlet end of a two-position four-way solenoid valve after being connected with oil pump, another oil outlet end of two-position four-way solenoid valve connects the second overflow valve, forward-reverse reversal valve is connected respectively two oil inlet ends of a balanced valve, two oil outlet ends of balanced valve are connected to running motor, and a shut-off valve is connected between two oil outlet ends of balanced valve.The design can effectively prevent oil pump feed deficiency in traveling, so as to effectively avoid fuel feeding from saturation occur, running motor inlet pressure establishes the phenomenon that insufficient, brake disc is in braking state, so as to efficiently avoid the generation of descending jitter phenomenon, when walking turns to lifting working platform at a high speed, it can effectively avoid turning to the generation of emptying phenomenon.
Description
Technical field：
Prevent descending from shaking and turning to the lifting working platform Ye Qu mechanisms being emptied the present invention relates to a kind of.
Background technology：
In the construction of engineering, lifting working platform is often used, hydraulic lifting workbench of the prior art
Hydraulic system is as shown in Fig. 2, there is following three shortcomings in the operation of work, and 1, lifting working platform (liquid drive) descending
When, it may appear that the phenomenon that running motor is above emptied, causes the insufficient pressure for supplying brake disc, lifting work occurs in brake disc locking
Make platform parking phenomenon, establish before running motor after pressure and can walk, thus occur that the one of self-powered platform walks one and stop
Descending jitter phenomenon, the pressure test curve of wherein pressure test port is as shown in Figure 3；2nd, lifting working platform turns to walking
When, for pressure-gradient control valve preferentially to supply flow rate is turned to, turning to the flow of small chamber does not have direct oil return box, but has arrived running motor, special
It is not to redirect to bottom when walking, has been superimposed the pressure of overflow valve, therefore it is not energy saving to walk；3rd, when lifting working platform high speed
When walking turns to, when oil also passes through second running motor and is turned in outer ring, it may appear that for shortage of oil phenomenon, easily go out to turn now to
It is emptied.
The content of the invention：
Prevent descending from shaking and turning to the lifting working platform Ye Qu mechanisms being emptied the present invention provides a kind of, which sets
Meter is reasonable, novel, can effectively prevent oil pump feed deficiency in traveling, so as to effectively avoid fuel feeding from saturation occur, walk horse
Up to inlet pressure establishes deficiency, brake disc is in the phenomenon of braking state, so as to efficiently avoid the hair of descending jitter phenomenon
It is raw, turn to walk when, being superimposed for steering pressure and overflow valve pressure can be effectively prevented from, turn to what is walked so as to ensure that
Energy saving, when walking turns to lifting working platform at a high speed, can effectively avoid turning to the generation of emptying phenomenon, solve existing
There is problem present in technology.
The present invention is that technical solution is used by solving above-mentioned technical problem：
A kind of lifting working platform Ye Qu mechanisms for preventing that descending from shaking and steering is emptied, including fuel tank, connection fuel tank
Oil pump, is connected with a filter, the other end of filter is connected with the first overflow valve, first overflow in the oil revolving end of fuel tank
The other end of valve is connected with the oil outlet end of oil pump, and first overflow valve is connected with a two-position four-way electromagnetism after being connected with oil pump
The oil inlet end of valve, an oil outlet end of two-position four-way solenoid valve connect the oil inlet end of a pressure-gradient control valve, two-position four-way solenoid valve it is another
Oil outlet end connects the second overflow valve, after the other end of the second overflow valve is connected with another oil inlet end of two-position four-way solenoid valve and mistake
Pipeline between filter and the first overflow valve is connected, and No. 1 oil outlet end of pressure-gradient control valve connects No. 1 oil inlet end of a switching valve and preferential
No. 3 oil inlet ends of valve, No. 2 oil inlet ends and the 3rd overflow valve of No. 3 oil outlet ends one switching valve of connection of pressure-gradient control valve, the 2 of switching valve
Number pipeline of oil inlet end, the other end of the 3rd overflow valve between filter and the first overflow valve is connected, and No. 2 of pressure-gradient control valve go out
Oily end connects No. 1 oil inlet end and a throttle valve of a forward-reverse reversal valve, and No. 2 oil inlet ends connection one of switching valve is positive unidirectional
It is connected after valve with No. 2 oil inlet ends of forward-reverse reversal valve, two oil outlet ends of forward-reverse reversal valve are connected respectively
Two oil inlet ends of one balanced valve, two oil outlet ends of balanced valve are connected to running motor, and two in balanced valve are fuel-displaced
A shut-off valve is connected between end, is connected with a high low speed switching valve between two running motors, the one of high low speed switching valve
Oil outlet end is also associated with a reverse check valve, and the other end of reverse check valve is connected with No. 2 oil inlet ends of forward-reverse reversal valve；
The other end of the throttle valve connects brake disc by a brake relief valve.
The brake relief valve includes the two-position two-way solenoid valve of connection throttle valve, in the oil inlet end of two-position two-way solenoid valve
A certain amount of pump is connected between oil outlet end, a check valve is connected between two-position two-way solenoid valve oil outlet end and constant displacement pump,
A check valve is connected between constant displacement pump and two-position two-way solenoid valve oil inlet end.
One oil outlet end of the switching valve connects the oil inlet end of a hydraulic cylinder, another oil outlet end connection liquid cylinder pressure of switching valve
Oil outlet end.
A hydraulic test mouth is connected between throttle valve and two-position two-way solenoid valve.
Using the above structure, this is reasonable in design, novel by the present invention, can effectively prevent that oil pump feed is not in traveling
Foot, so as to effectively avoid fuel feeding from saturation occur, running motor inlet pressure establishes deficiency, brake disc is in showing for braking state
As so as to efficiently avoid the generation of descending jitter phenomenon, when turning to walking, steering pressure can be effectively prevented from overflowing
The superposition of valve pressure is flowed, so that ensure that the energy saving for turning to walking, when walking turns to lifting working platform at a high speed, Neng Gouyou
The generation for avoiding turning to emptying phenomenon of effect, uses suitable for being widely popularized.
Brief description of the drawings：
Fig. 1 is the hydraulic principle figure of the present invention.
Fig. 2 is hydraulic principle figure of the prior art.
Fig. 3 is the pressure test curve of hydraulic test mouth in the prior art.
Fig. 4 is the pressure test curve of hydraulic test mouth of the present invention.
In figure, 1.1 fuel tanks, 1.2 oil pumps, 1.3 filters, 1.4 first overflow valves, 1.5 two-position four-way solenoid valves, 1.6 is excellent
First valve, 1.7 second overflow valves, 1.8 switching valves, 1.9 the 3rd overflow valves, 2.0 forward-reverse reversal valves, 2.1 throttle valves, 2.2 just
To check valve, 2.3 balanced valves, 2.4 running motors, 2.5 shut-off valves, 2.6 high low speed switching valves, 2.7 reverse check valves, 2.8 stop
Hull, 2.9 two-position two-way solenoid valves, 3.0 constant displacement pumps, 3.1 check valves, 3.2 hydraulic cylinders, 3.3 hydraulic test mouths.
Embodiment：
In order to clarify the technical characteristics of the invention, below by embodiment, and its attached drawing is combined, to this hair
It is bright to be described in detail.
It is a kind of to prevent descending from shaking and turning to the lifting working platform Ye Qu mechanisms being emptied, including oil as shown in Fig. 1,4
Case 1.1, the oil pump 1.2 for connecting fuel tank 1.1, a filter 1.3 is connected with the oil revolving end of fuel tank 1.1, filter 1.3 it is another
End is connected with the first overflow valve 1.4, and the other end of first overflow valve 1.4 is connected with the oil outlet end of oil pump 1.2, and described the
One overflow valve 1.4 is connected with the oil inlet end of a two-position four-way solenoid valve 1.5, two-position four-way solenoid valve 1.5 after being connected with oil pump 1.2
An oil outlet end connect the oil inlet end of a pressure-gradient control valve 1.6, another oil outlet end of two-position four-way solenoid valve 1.5 connects the second overflow valve
1.7, the other end of the second overflow valve 1.7 be connected with another oil inlet end of two-position four-way solenoid valve 1.5 after with filter 1.3 and
Pipeline between one overflow valve 1.4 is connected, and No. 1 oil outlet end of pressure-gradient control valve 1.6 connects No. 1 oil inlet end of a switching valve 1.8 and excellent
No. 3 oil inlet ends of first valve 1.6, No. 3 oil outlet ends of pressure-gradient control valve 1.6 connect No. 2 oil inlet ends and the 3rd overflow valve of a switching valve 1.8
1.9, No. 2 oil inlet ends of switching valve 1.8, the other end of the 3rd overflow valve 1.9 with 1.3 and first overflow valve 1.4 of filter it
Between pipeline be connected, No. 2 oil outlet ends of pressure-gradient control valve 1.6 connect No. 1 oil inlet end and a throttle valve of a forward-reverse reversal valve 2.0
2.1, No. 2 oil inlet end phases after one positive check valve 2.2 of No. 2 oil inlet ends of switching valve 1.8 connection with forward-reverse reversal valve 2.0
Connection, two oil outlet ends of forward-reverse reversal valve 2.0 are connected respectively two oil inlet ends of a balanced valve 2.3, balanced valve
2.3 two oil outlet ends are connected to running motor 2.4, and a cut-off is connected between two oil outlet ends of balanced valve 2.3
Valve 2.5, is connected with a high low speed switching valve 2.6, an oil outlet end of high low speed switching valve 2.6 between two running motors 2.4
It is also associated with a reverse check valve 2.7, the other end of reverse check valve 2.7 and No. 2 oil inlet end phases of forward-reverse reversal valve 2.0
Even；The other end of the throttle valve 2.1 connects brake disc 2.8 by a brake relief valve.
The brake relief valve includes the two-position two-way solenoid valve 2.9 of connection throttle valve, in two-position two-way solenoid valve 2.9
A certain amount of pump 3.0 is connected between oil inlet end and oil outlet end, between 2.9 oil outlet end of two-position two-way solenoid valve and constant displacement pump 3.0
A check valve 3.1 is connected with, a check valve 3.1 is connected between 2.9 oil inlet end of constant displacement pump 3.0 and two-position two-way solenoid valve.
One oil outlet end of the switching valve 1.8 connects the oil inlet end of a hydraulic cylinder 3.2, another oil outlet end of switching valve 1.8
The oil outlet end of connection liquid cylinder pressure 3.2.
A hydraulic test mouth 3.3 is connected between throttle valve 2.1 and two-position two-way solenoid valve 2.9.
It is using the present invention to prevent descending from shaking and turning to the lifting working platform Ye Qu mechanisms being emptied, forward-reverse commutation
Balanced valve 2.3 between valve 2.0 and high low speed switching valve 2.6, is effectively controlled by the aperture of pressure control valve throttle orifice, so that
The increase and reduction of lifting working platform speed are slow down, effectively prevent the generation of descending jitter phenomenon；Utilize pressure-gradient control valve 1.6
Connection between switching valve 1.8, the fluid in steering procedure can be returned directly in fuel tank 1.1, turning to the process of walking
In, will not produce steering pressure and the 3rd overflow valve 1.9 has pressure superposition, so as to ensure that the energy saving for turning to walking；Oil return
Positive check valve 2.2 on road can establish pressure, and when going out to turn now to be emptied, fluid can be opened by reverse check valve 2.7
Carry out repairing, the phenomenon for effectively avoiding running motor from being emptied.
Above-mentioned embodiment cannot function as limiting the scope of the invention, for the technology people of the art
For member, any alternate modification or conversion made to embodiment of the present invention are all fallen within protection scope of the present invention.
Part is not described in detail by the present invention, is the known technology of those skilled in the art of the present technique.
Claims (4)
1. a kind of prevent descending from shaking and turning to the lifting working platform Ye Qu mechanisms being emptied, including fuel tank, the oil for connecting fuel tank
Pump, is connected with a filter, the other end of filter is connected with the first overflow valve, first overflow valve in the oil revolving end of fuel tank
The other end be connected with the oil outlet end of oil pump, it is characterised in that：First overflow valve is connected with one or two after being connected with oil pump
The oil inlet end of position four-way solenoid valve, an oil outlet end of two-position four-way solenoid valve connect the oil inlet end of a pressure-gradient control valve, two-position four-way electricity
Another oil outlet end of magnet valve connects the second overflow valve, the other end of the second overflow valve and another oil inlet end of two-position four-way solenoid valve
Pipeline filter and the first overflow valve between is connected after being connected, No. 1 of No. 1 oil outlet end one switching valve of connection of pressure-gradient control valve into
Oily end and No. 3 oil inlet ends of pressure-gradient control valve, No. 3 oil outlet ends of pressure-gradient control valve connect No. 2 oil inlet ends and the 3rd overflow valve of a switching valve,
No. 2 oil inlet ends, pipeline of the other end of the 3rd overflow valve between filter and the first overflow valve of switching valve are connected, preferentially
No. 2 oil outlet ends of valve connect No. 1 oil inlet end and a throttle valve of a forward-reverse reversal valve, No. 2 oil inlet ends connection of switching valve
It is connected after one positive check valve with No. 2 oil inlet ends of forward-reverse reversal valve, two oil outlet ends point of forward-reverse reversal valve
Two oil inlet ends of a balanced valve Dui Ying not be connected, two oil outlet ends of balanced valve are connected to running motor, in balanced valve
Two oil outlet ends between be connected with a shut-off valve, a high low speed switching valve, high low speed are connected between two running motors
One oil outlet end of switching valve is also associated with a reverse check valve, the other end of reverse check valve with No. 2 of forward-reverse reversal valve
Oil inlet end is connected；The other end of the throttle valve connects brake disc by a brake relief valve.
2. a kind of lifting working platform Ye Qu mechanisms for preventing that descending from shaking and steering is emptied according to claim 1, its
It is characterized in that：The brake relief valve includes the two-position two-way solenoid valve of connection throttle valve, in the oil inlet of two-position two-way solenoid valve
A certain amount of pump is connected between end and oil outlet end, it is unidirectional to be connected with one between two-position two-way solenoid valve oil outlet end and constant displacement pump
Valve, is connected with a check valve between constant displacement pump and two-position two-way solenoid valve oil inlet end.
3. a kind of lifting working platform Ye Qu mechanisms for preventing that descending from shaking and steering is emptied according to claim 1, its
It is characterized in that：One oil outlet end of the switching valve connects the oil inlet end of a hydraulic cylinder, another oil outlet end connection hydraulic pressure of switching valve
The oil outlet end of cylinder.
4. a kind of lifting working platform Ye Qu mechanisms for preventing that descending from shaking and steering is emptied according to claim 2, its
It is characterized in that：A hydraulic test mouth is connected between throttle valve and two-position two-way solenoid valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710224491.1A CN107061388B (en) | 2017-04-07 | 2017-04-07 | It is a kind of to prevent descending from shaking and turning to the lifting working platform Ye Qu mechanisms being emptied |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710224491.1A CN107061388B (en) | 2017-04-07 | 2017-04-07 | It is a kind of to prevent descending from shaking and turning to the lifting working platform Ye Qu mechanisms being emptied |
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| Publication Number | Publication Date |
|---|---|
| CN107061388A CN107061388A (en) | 2017-08-18 |
| CN107061388B true CN107061388B (en) | 2018-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710224491.1A Active CN107061388B (en) | 2017-04-07 | 2017-04-07 | It is a kind of to prevent descending from shaking and turning to the lifting working platform Ye Qu mechanisms being emptied |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108678689A (en) * | 2018-04-23 | 2018-10-19 | 廖恒伟 | A kind of oil-well rig hydraulic hoisting machine host |
| CN116557370A (en) * | 2023-07-06 | 2023-08-08 | 徐工消防安全装备有限公司 | Work platform control system and aerial work platform equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004076334A1 (en) * | 2003-02-27 | 2004-09-10 | Hitachi Construction Machinery Co., Ltd. | Hydraulic control device of hydraulic working machine |
| CN101058395A (en) * | 2006-04-19 | 2007-10-24 | 浙江佳力科技股份有限公司 | Full hydraulic electric forklift hydraulic system |
| CN102030293A (en) * | 2010-12-10 | 2011-04-27 | 徐州重型机械有限公司 | Elevated operation vehicle and platform leveling hydraulic system thereof |
| 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 |
| CN206694340U (en) * | 2017-04-07 | 2017-12-01 | 临工集团济南重机有限公司 | It is a kind of to prevent descending from shaking and turning to the lifting working platform Ye Qu mechanisms being emptied |
-
2017
- 2017-04-07 CN CN201710224491.1A patent/CN107061388B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004076334A1 (en) * | 2003-02-27 | 2004-09-10 | Hitachi Construction Machinery Co., Ltd. | Hydraulic control device of hydraulic working machine |
| CN101058395A (en) * | 2006-04-19 | 2007-10-24 | 浙江佳力科技股份有限公司 | Full hydraulic electric forklift hydraulic system |
| CN102030293A (en) * | 2010-12-10 | 2011-04-27 | 徐州重型机械有限公司 | Elevated operation vehicle and platform leveling hydraulic system thereof |
| 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 |
| CN206694340U (en) * | 2017-04-07 | 2017-12-01 | 临工集团济南重机有限公司 | It is a kind of to prevent descending from shaking and turning to the lifting working platform Ye Qu mechanisms being emptied |
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| CN107061388A (en) | 2017-08-18 |
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Address after: No.2676 Kejia Road, high tech Zone, Jinan City, Shandong Province, 250104 Patentee after: Lingong Heavy Machinery Co.,Ltd. Address before: No.2676 Kejia Road, high tech Zone, Jinan City, Shandong Province, 250104 Patentee before: LINGONG GROUP JINAN HEAVY MACHINERY Co.,Ltd. |