CN204239355U - Supercharging device, supercharging oil way structure of hydraulic system and mechanical equipment - Google Patents
Supercharging device, supercharging oil way structure of hydraulic system and mechanical equipment Download PDFInfo
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- CN204239355U CN204239355U CN201420669353.6U CN201420669353U CN204239355U CN 204239355 U CN204239355 U CN 204239355U CN 201420669353 U CN201420669353 U CN 201420669353U CN 204239355 U CN204239355 U CN 204239355U
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- 239000012530 fluid Substances 0.000 claims abstract description 52
- 239000003921 oil Substances 0.000 claims description 201
- 230000001174 ascending effect Effects 0.000 claims description 22
- 239000010720 hydraulic oil Substances 0.000 claims description 22
- 230000003028 elevating effect Effects 0.000 claims description 11
- 239000002828 fuel tank Substances 0.000 claims description 9
- 238000012423 maintenance Methods 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 239000000446 fuel Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000000416 exudates and transudate Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Fluid-Pressure Circuits (AREA)
Abstract
The utility model discloses a supercharging device, hydraulic system's pressure boost oil circuit structure and mechanical equipment, supercharging device is including hydraulic motor (8) that have first hydraulic fluid port and second hydraulic fluid port and hydraulic pump (9) that have oil absorption mouth and press the oil port, the discharge capacity of hydraulic motor (8) is greater than the discharge capacity of hydraulic pump (9), the power output shaft transmission of hydraulic motor (8) connect in the power input shaft of hydraulic pump (9). The utility model provides a supercharging device can be used for carrying out continuous pressure boost operation.
Description
Technical field
The utility model relates to hydraulic conversion device, particularly, relates to a kind of supercharging device.In addition, the utility model also relates to a kind of Pressure Increasing Oil-Line structure of described supercharging device and comprise the machinery of this Pressure Increasing Oil-Line structure of comprising.
Background technique
Elevating fire truck refers to and is equipped with support system, rotary disk, elevates the special-purpose vehicle of jib and fire-fighting equipment, can carry out ascend a height fire extinguishing and rescue.Usually, according to the difference in the difference of elevating fire truck boom system structure and purposes, aerial ladder truck, Elevating platform fire truck and Water tower fire truck etc. are divided into.Wherein, aerial ladder truck and Elevating platform fire truck are also provided with ascending platform, carry out ascending a height tall building, the rescue work such as rescue trapped personnel etc. puted out a fire to save life and property for fire personnel.
In order to make fire personnel carry out rescue work safely, ascending platform need keep level.Usually leveling is carried out by hydraulic system in prior art, namely the sensor whether being in level for detecting ascending platform is set, the oil hydraulic pump of the SC sigmal control hydraulic system that controller sends according to this sensor to corresponding chamber (rodless cavity as oil hydraulic cylinder) pumps hydraulic oil, to keep ascending platform level.
But in some cases, oil hydraulic pump may occur cannot provide the high pressure oil keeping ascending platform maintenance level.Such as cannot when outputting power at the main power plant (motor etc.) for driving oil hydraulic pump, if now elevate jib to be just in and to stretch out or extended configuration, although elevate jib can rely on the hydraulic oil in self gravitation exudate cylinder pressure and retract or fold, but still the personal safety of fire personnel can be had a strong impact on because ascending platform cannot keep level.
Now, if the energy of the hydraulic oil of discharging from described oil hydraulic cylinder can be used for make ascending platform maintenance level, then can solve the problem.But the oil pressure of the hydraulic oil of discharging from oil hydraulic cylinder is difficult to meet the requirement keeping ascending platform level, therefore, needs to carry out supercharging.
Figure 1 shows that a kind of common pressurization system that make use of pressurized cylinder 1, the piston 3 that pressurized cylinder 1 comprises cylinder body 2 and is arranged in this cylinder body 2.When solenoid directional control valve 4 commutates to right position, the low pressure oil exported by low pressure oil sources 6 enters the left chamber of low pressure of pressurized cylinder 1, thus promotion piston 3 moves right.Meanwhile, the hydraulic oil in the right chamber of high pressure exports high pressure oil through output circuit.
But, when piston 3 moves right to limit position, solenoid directional control valve 4 need be made to commutate to left position, thus low pressure oil enters the right chamber of high pressure by one-way valve 5, simultaneously, hydraulic oil in the left chamber of low pressure to fuel tank 7 through solenoid directional control valve 4 oil return, resets to promote piston 3 to be moved to the left and just can carry out the supercharging operation of next cycle.As can be seen here, in the stroke only moved right at piston 3, just export high pressure oil, then stopping exporting in the stroke of left movement, thus cannot supercharging continuously.If utilize this pressurized cylinder 1 to solve the problems of the technologies described above, then need the volume in the right chamber of high pressure to be enough to ensure the traffic demand of ascending platform maintenance level, this needs pressurized cylinder 1 to be designed to have larger volume, causes and is difficult to arrange.
In view of this, be necessary to provide a kind of novel hydraulic conversion equipment, to solve above-mentioned problems of the prior art.
Model utility content
Technical problem to be solved in the utility model is to provide a kind of supercharging device, and this supercharging device can carry out supercharging operation continuously, and, even if power plant cannot outputting power time, still can pumping high pressure oil.
To achieve these goals, the utility model provides a kind of supercharging device, comprise the oil hydraulic motor with the first hydraulic fluid port and the second hydraulic fluid port and the oil hydraulic pump with inlet port and force feed mouth, the discharge capacity of described oil hydraulic motor is greater than described hydraulic pressure pump delivery, and the pto of described oil hydraulic motor is connected to the power input shaft of described oil hydraulic pump.
Preferably, described oil hydraulic motor is gear motor, and described oil hydraulic pump is gear pump.
Preferably, the described pto＝power take-off of described oil hydraulic motor is connected to the described power input shaft of described oil hydraulic pump by coupling.
Preferably, second hydraulic fluid port of described oil hydraulic motor is connected with output circuit, this output circuit is provided with back pressure valve, and the inlet port of described oil hydraulic pump is connected in the oil circuit part between second hydraulic fluid port at described oil hydraulic motor of described output circuit and described back pressure valve.
Preferably, described back pressure valve is the one-way valve that forward hydraulic fluid port is connected to the second hydraulic fluid port of described oil hydraulic motor.
On this basis, the utility model provides a kind of Pressure Increasing Oil-Line structure of hydraulic system, this Pressure Increasing Oil-Line structure comprises the described supercharging device that the utility model provides, wherein, first hydraulic fluid port of described oil hydraulic motor is connected to pressure oil-source, with can by the first hydraulic fluid port conveying hydraulic oil for drive the pto＝power take-off of this oil hydraulic motor rotate of this pressure oil-source to this oil hydraulic motor, the inlet port of described oil hydraulic pump is connected to oil sources or oil circuit for providing hydraulic oil for this inlet port, and the force feed mouth of this oil hydraulic pump hydraulic control circuit that is connected to the target hydraulic executive component in described hydraulic system is with can to this hydraulic control circuit fuel feeding.
Preferably, described Pressure Increasing Oil-Line structure also comprises output circuit, one end of this output circuit is connected to the second hydraulic fluid port of described oil hydraulic motor, the other end is connected to fuel tank, and this output circuit is provided with back pressure valve, the inlet port of described oil hydraulic pump is connected in the oil circuit part between second hydraulic fluid port at described oil hydraulic motor of described output circuit and described back pressure valve.
In addition, the utility model also provides a kind of machinery with hydraulic system, and the hydraulic system of this machinery comprises the described Pressure Increasing Oil-Line structure that the utility model provides.
Preferably, described machinery is fire-fighting truck, this fire-fighting truck has and elevates jib and ascending platform, described hydraulic system comprises for elevating the flexible of jib action or amplitude oil cylinder described in driving and for making the leveling cyclinder of described ascending platform maintenance level, first hydraulic fluid port of described oil hydraulic motor is connected to the described flexible or amplitude oil cylinder as described pressure oil-source, to elevate described the first hydraulic fluid port when jib relies on self gravitation to fall after rise, the hydraulic oil in described flexible or amplitude oil cylinder being delivered to described oil hydraulic motor; The force feed mouth of described oil hydraulic pump is connected to the expansion control loop of the described leveling cyclinder as described target hydraulic executive component.
By technique scheme of the present utility model, the the first hydraulic fluid port oil pressure supposing oil hydraulic motor is P1, the oil pressure that the force feed mouth of oil hydraulic pump exports is P2, the inlet port of oil hydraulic pump and the second oil port oil pressure of oil hydraulic motor are P0, oil hydraulic motor and hydraulic pressure pump delivery are respectively q1 and q2 (wherein, q1 > q2), when ignoring the pressure loss, because hydraulic motor transmission is connected to oil hydraulic pump, then there is following relation:
(P1-P0)×q1＝(P2-P0)×q2
Due to q1 > q2, therefore, P1 < P2.Namely oil hydraulic pump outputs the hydraulic oil that oil pressure is greater than the first hydraulic fluid port oil pressure of oil hydraulic motor.In addition, because oil hydraulic motor and oil hydraulic pump are rotation, therefore, it is possible to carry out continuous print supercharging operation.This supercharging device can be used in having on the fire-fighting truck of ascending platform, with when main power plant lost efficacy, can utilize and rely on the low pressure oil elevating the generation of jib self gravitation to produce high pressure oil ascending platform being carried out to leveling, ensure the safety of fire personnel.
Other features and advantages of the utility model are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide further understanding of the present utility model, and forms a part for specification, is used from explanation the utility model, but does not form restriction of the present utility model with embodiment one below.In the accompanying drawings:
Fig. 1 is a kind of common pressurization system in prior art;
Fig. 2 is the schematic diagram of the Pressure Increasing Oil-Line structure according to a kind of preferred implementation of the utility model, which show supercharging device of the present utility model.
Description of reference numerals
1 pressurized cylinder 2 cylinder body
3 piston 4 solenoid directional control valves
5 one-way valve 6 low pressure oil sources
7 fuel tank 8 oil hydraulic motors
9 oil hydraulic pump 10 coupling
11 back pressure valves
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the utility model, is not limited to the utility model.
First it should be noted that, although the utility model is cannot outputting power and the technical problem of ascending platform level cannot be kept to propose at main power plant based on elevating fire truck, below also will mainly be described around this problem of solution, but supercharging device of the present utility model and Pressure Increasing Oil-Line structure are not limited to this, but may be used for any one suitable occasion, to obtain relatively high pressure oil by low pressure oil.
With reference to shown in Fig. 2, according to the supercharging device of a kind of preferred implementation of the utility model, comprise oil hydraulic motor 8 and oil hydraulic pump 9.Wherein, oil hydraulic motor 8 has the first hydraulic fluid port and the second hydraulic fluid port, and the hydraulic oil with certain pressure can enter oil hydraulic motor 8 by the first hydraulic fluid port and drive gear or the rotor turns of this oil hydraulic motor 8, and by its pto＝power take-off outputting power.Oil hydraulic pump 9 has inlet port and force feed mouth, when the power input shaft of this oil hydraulic pump 9 inputs a determined power and drives its gear or rotor turns, can pass through inlet port inhalant liquid force feed, and pump out pressure oil by force feed mouth.For those skilled in the art well known, said gear and rotor are for different types of oil hydraulic motor or oil hydraulic pump, as the gear of gear pump, the rotor etc. of vane pump, but this does not limit scope of the present utility model, such as, for plunger pump, driving is used for the cylinder body and the plunger rotation that hold plunger by the power of power input shaft input.Preferably, described oil hydraulic motor 8 is gear motor, and described oil hydraulic pump 9 is gear pump, below will be described for this preferred implementation.
Importantly, in supercharging device of the present utility model, the discharge capacity of described oil hydraulic motor 8 is greater than the discharge capacity of described oil hydraulic pump 9, and the pto of described oil hydraulic motor 8 is connected to the power input shaft of described oil hydraulic pump 9.Thus oil hydraulic motor 8 the first hydraulic fluid port oil-feed and drive this oil hydraulic motor 8 gear rotate time, the pto＝power take-off of this oil hydraulic motor 8 can drive the gear of described oil hydraulic pump 9 to rotate, thus make the inlet port inhalant liquid force feed of this oil hydraulic pump 9, and be greater than the hydraulic oil of the first hydraulic fluid port oil pressure of described oil hydraulic motor 8 from this its force feed mouth output oil pressure via the pumping of this oil hydraulic pump 9, realize supercharging operation.
The above-mentioned pressure oil being supplied to the first hydraulic fluid port of oil hydraulic motor 8 can obtain in several ways.Such as, elevate in the machinery of jib having, this pressure oil for falling after rise in (shrinking or the range of decrease) process at the described jib self gravitation that elevates, can elevate the hydraulic oil of discharging in the oil hydraulic cylinder of boom frame telescopic or luffing from for controlling this.Like this, main power plant (motor as driving oil hydraulic pump) cannot outputting power time, it is the hydraulic energy driving oil hydraulic motor 8 by the transform gravitational energy elevating jib, and then after supercharging device supercharging of the present utility model, be supplied to the expansion control loop for making ascending platform maintenance level.
Be described the supercharging principle of the supercharging device according to the utility model preferred implementation below, in this embodiment, the second hydraulic fluid port of oil hydraulic motor 8 is communicated in the inlet port of oil hydraulic pump 9.The the first hydraulic fluid port oil pressure supposing oil hydraulic motor 8 is P1, the oil pressure that the force feed mouth of oil hydraulic pump 9 exports is P2, the inlet port of oil hydraulic pump 9 and the second hydraulic fluid port oil pressure of oil hydraulic motor 8 are P0, the discharge capacity of oil hydraulic motor 8 and oil hydraulic pump 9 is respectively q1 and q2 (wherein, q1 > q2), when ignoring the pressure loss, output power due to oil hydraulic motor 8 equals the input power ((P1-P0) × q1=(P2-P0) × q2) of oil hydraulic pump 9, can obtain P1 < P2.Namely oil hydraulic pump 9 outputs the hydraulic oil that oil pressure is greater than the first hydraulic fluid port oil pressure of oil hydraulic motor 8.
In alternate embodiments, second hydraulic fluid port oil pressure of oil hydraulic motor 8 can be unequal with the inlet port oil pressure of oil hydraulic pump 8, such as back pressure valve 11 can be set on the oil circuit of the second hydraulic fluid port of connecting fluid pressure motor 8, and the inlet port of oil hydraulic pump 9 directly can be communicated in fuel tank.Now, in order to have higher charging efficiency, the cracking pressure of back pressure valve 11 should be not excessive, to improve the mechanical efficiency of oil hydraulic motor 8.
As shown in Figure 2, in the supercharging device according to the utility model preferred implementation, the pto＝power take-off of oil hydraulic motor 8 is connected to the power input shaft of oil hydraulic pump 9 by coupling 10.
Just as described above, the inlet port of oil hydraulic pump 9 directly can be communicated in fuel tank to carry out oil suction.But this may can not fully oil suction because the suction of oil hydraulic pump 9 is not enough, causes inhaling sky.Therefore, according in supercharging device of the present utility model, output circuit can be connected with at the second hydraulic fluid port of oil hydraulic motor 8, this output circuit is provided with back pressure valve 11, the inlet port of oil hydraulic pump 9 is connected in the oil circuit part between second hydraulic fluid port at described oil hydraulic motor 8 of described output circuit and described back pressure valve 11.By this set, the hydraulic oil that oil hydraulic motor 8 is discharged can preferentially be supplied to oil hydraulic pump 9, and after meeting oil hydraulic pump 9 needs, the output circuit voltage rise that oils is high and open back pressure valve 11, just makes unnecessary hydraulic oil flow back to fuel tank 7.Preferably, described back pressure valve 11 can be connected to the one-way valve of the second hydraulic fluid port of oil hydraulic motor 8 for forward hydraulic fluid port.
According to another aspect of the present utility model, a kind of Pressure Increasing Oil-Line structure of hydraulic system is also provided, this Pressure Increasing Oil-Line structure comprises above-mentioned supercharging device, wherein, first hydraulic fluid port of described oil hydraulic motor 8 is connected to pressure oil-source, with can by the first hydraulic fluid port conveying hydraulic oil for drive the pto＝power take-off of this oil hydraulic motor 8 rotate of this pressure oil-source to this oil hydraulic motor 8, the inlet port of described oil hydraulic pump 9 is connected to oil sources or oil circuit for providing hydraulic oil for this inlet port, and the force feed mouth of this oil hydraulic pump 9 hydraulic control circuit that is connected to the target hydraulic executive component in described hydraulic system is with can to this hydraulic control circuit fuel feeding.
In Pressure Increasing Oil-Line structure of the present utility model, just as described abovely, pressure oil-source can provide the device of pressure oil for any one, as long as this pressure oil is enough to drive oil hydraulic motor 8 outputting power.Described target hydraulic executive component is the hydraulic actuator needing in this hydraulic system to be driven by the high pressure oil that obtained by described supercharging device, as on elevating fire truck for making the leveling cyclinder of ascending platform level.
In addition, the oil sources or the oil circuit that are connected to the inlet port of oil hydraulic pump 9 can be the second hydraulic fluid port of fuel tank, oil hydraulic motor 8 or other any oil feeding lines.According to preferred implementation of the present utility model, described Pressure Increasing Oil-Line structure also comprises output circuit, one end of this output circuit is connected to the second hydraulic fluid port of described oil hydraulic motor 8, the other end is connected to fuel tank, and this output circuit is provided with back pressure valve 11, the inlet port of oil hydraulic pump 9 is connected in the oil circuit part between second hydraulic fluid port at described oil hydraulic motor 8 of described output circuit and described back pressure valve 11, to avoid oil hydraulic pump 9 can not fully oil suction.
In addition, the utility model also provides the machinery with hydraulic system, and wherein, described hydraulic system comprises above-mentioned Pressure Increasing Oil-Line structure.Typically, described machinery can be fire-fighting truck, and this fire-fighting truck has and elevates jib and ascending platform, and described hydraulic system comprises for elevating the flexible of jib action or amplitude oil cylinder described in driving and for making the leveling cyclinder of described ascending platform maintenance level.Elevate jib in dependence self gravitation falling process, described flexible or amplitude oil cylinder can as pressure oil-source, using through the leveling cyclinder of supercharging rear driving as target executive component.Particularly, the first hydraulic fluid port of described oil hydraulic motor 8 is connected to described flexible or amplitude oil cylinder, to elevate described the first hydraulic fluid port when jib relies on self gravitation to fall after rise, the hydraulic oil in described flexible or amplitude oil cylinder being delivered to described oil hydraulic motor 8; The force feed mouth of described oil hydraulic pump 9 is connected to the expansion control loop of described leveling cyclinder.Thus, for drive oil hydraulic pump 9 main power plant cannot outputting power time, still can keep ascending platform level, the safety of support personnel and goods and materials.
Below preferred implementation of the present utility model is described by reference to the accompanying drawings in detail; but; the utility model is not limited to the detail in above-mentioned mode of execution; within the scope of technical conceive of the present utility model; can carry out multiple simple variant to the technical solution of the utility model, these simple variant all belong to protection domain of the present utility model.
It should be noted that in addition, each the concrete technical characteristics described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the utility model illustrates no longer separately to various possible compound mode.
In addition, also can carry out combination in any between various different mode of execution of the present utility model, as long as it is without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Claims (9)
1. supercharging device, it is characterized in that, comprise the oil hydraulic motor (8) with the first hydraulic fluid port and the second hydraulic fluid port and the oil hydraulic pump (9) with inlet port and force feed mouth, the discharge capacity of described oil hydraulic motor (8) is greater than the discharge capacity of described oil hydraulic pump (9), and the pto of described oil hydraulic motor (8) is connected to the power input shaft of described oil hydraulic pump (9).
2. supercharging device according to claim 1, is characterized in that, described oil hydraulic motor (8) is gear motor, and described oil hydraulic pump (9) is gear pump.
3. supercharging device according to claim 1, is characterized in that, the described pto＝power take-off of described oil hydraulic motor (8) is connected to the described power input shaft of described oil hydraulic pump (9) by coupling (10).
4. supercharging device as claimed in any of claims 1 to 3, it is characterized in that, second hydraulic fluid port of described oil hydraulic motor (8) is connected with output circuit, this output circuit is provided with back pressure valve (11), the inlet port of described oil hydraulic pump (9) is connected in the oil circuit part between second hydraulic fluid port being positioned at described oil hydraulic motor (8) of described output circuit and described back pressure valve (11).
5. supercharging device according to claim 4, is characterized in that, described back pressure valve (11) is connected to the one-way valve of the second hydraulic fluid port of described oil hydraulic motor (8) for forward hydraulic fluid port.
6. the Pressure Increasing Oil-Line structure of hydraulic system, it is characterized in that, comprise supercharging device according to any one of claim 1 to 3, wherein, first hydraulic fluid port of described oil hydraulic motor (8) is connected to pressure oil-source, so that the first hydraulic fluid port conveying hydraulic oil for drive the pto＝power take-off of this oil hydraulic motor (8) rotate of this pressure oil-source to this oil hydraulic motor (8) can be passed through, the inlet port of described oil hydraulic pump (9) is connected to oil sources or oil circuit for providing hydraulic oil for this inlet port, and the force feed mouth of this oil hydraulic pump (9) hydraulic control circuit that is connected to the target hydraulic executive component in described hydraulic system is with can to this hydraulic control circuit fuel feeding.
7. Pressure Increasing Oil-Line structure according to claim 6, it is characterized in that, described Pressure Increasing Oil-Line structure also comprises output circuit, one end of this output circuit is connected to the second hydraulic fluid port of described oil hydraulic motor (8), the other end is connected to fuel tank (7), and this output circuit being provided with back pressure valve (11), the inlet port of described oil hydraulic pump (9) is connected in the oil circuit part between second hydraulic fluid port being positioned at described oil hydraulic motor (8) of described output circuit and described back pressure valve (11).
8. have the machinery of hydraulic system, it is characterized in that, the hydraulic system of this machinery comprises the Pressure Increasing Oil-Line structure according to claim 6 or 7.
9. machinery according to claim 8, it is characterized in that, described machinery is fire-fighting truck, this fire-fighting truck has and elevates jib and ascending platform, described hydraulic system comprises for elevating the flexible of jib action or amplitude oil cylinder described in driving and for making the leveling cyclinder of described ascending platform maintenance level, first hydraulic fluid port of described oil hydraulic motor (8) is connected to the described flexible or amplitude oil cylinder as described pressure oil-source, to elevate described the first hydraulic fluid port when jib relies on self gravitation to fall after rise, the hydraulic oil in described flexible or amplitude oil cylinder being delivered to described oil hydraulic motor (8), the force feed mouth of described oil hydraulic pump (9) is connected to the expansion control loop of the described leveling cyclinder as described target hydraulic executive component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420669353.6U CN204239355U (en) | 2014-11-11 | 2014-11-11 | Supercharging device, supercharging oil way structure of hydraulic system and mechanical equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420669353.6U CN204239355U (en) | 2014-11-11 | 2014-11-11 | Supercharging device, supercharging oil way structure of hydraulic system and mechanical equipment |
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| CN204239355U true CN204239355U (en) | 2015-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420669353.6U Active CN204239355U (en) | 2014-11-11 | 2014-11-11 | Supercharging device, supercharging oil way structure of hydraulic system and mechanical equipment |
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| CN (1) | CN204239355U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107339289A (en) * | 2017-08-15 | 2017-11-10 | 杭州力龙液压有限公司 | Anti- for hydraulic power unit is emptied device and hydraulic power pack |
| CN116892545A (en) * | 2023-09-11 | 2023-10-17 | 临工重机股份有限公司 | Control system of aerial work platform and aerial work platform |
-
2014
- 2014-11-11 CN CN201420669353.6U patent/CN204239355U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107339289A (en) * | 2017-08-15 | 2017-11-10 | 杭州力龙液压有限公司 | Anti- for hydraulic power unit is emptied device and hydraulic power pack |
| CN116892545A (en) * | 2023-09-11 | 2023-10-17 | 临工重机股份有限公司 | Control system of aerial work platform and aerial work platform |
| CN116892545B (en) * | 2023-09-11 | 2024-05-31 | 临工重机股份有限公司 | Control system of aerial work platform and aerial work platform |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 410200 No. 997, Section 2, Tengfei Road, Wangcheng District, Changsha City, Hunan Province Patentee after: Hunan Zoomlion emergency equipment Co.,Ltd. Patentee after: ZOOMLION HEAVY INDUSTRY SCIENCE&TECHNOLOGY Co.,Ltd. Address before: No.997 Jinxing Road, Wangcheng District, Changsha City, Hunan Province Patentee before: Changsha Zhonglian Fire-Fighting Machinery Co.,Ltd. Patentee before: ZOOMLION HEAVY INDUSTRY SCIENCE&TECHNOLOGY Co.,Ltd. |
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| CP03 | Change of name, title or address |