CN203335500U - Elevating platform fire truck and hydraulic leveling system thereof - Google Patents
Elevating platform fire truck and hydraulic leveling system thereof Download PDFInfo
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- CN203335500U CN203335500U CN2013203616675U CN201320361667U CN203335500U CN 203335500 U CN203335500 U CN 203335500U CN 2013203616675 U CN2013203616675 U CN 2013203616675U CN 201320361667 U CN201320361667 U CN 201320361667U CN 203335500 U CN203335500 U CN 203335500U
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Abstract
The utility model discloses an elevating platform fire truck and a hydraulic leveling system of the elevating platform fire truck. The hydraulic leveling system comprises a leveling oil cylinder and an electronic control leveling device used for adjusting the leveling oil cylinder and further comprises a hydraulic source, a hand-operated pump and a hand-operated reversing valve, wherein the hand-operated pump and the hand-operated reversing valve are arranged on an elevating working platform. When the hand-operated reversing valve is in a first working position, the hand-operated pump is communicated with a rod cavity of the leveling oil cylinder, when the hand-operated reversing valve is in a second working position, an oil outlet is communicated with a rodless cavity of the leveling oil cylinder, and when the hand-operated reversing valve is in a third working position, an oil duct of the rod cavity and an oil duct of the rodless cavity are cut off. In the system, components used for controlling the hand-operated pump of the leveling oil cylinder and components used for controlling the hand-operated reversing valve are all controlled by hand, therefore, the system does not rely on an electrical system, when the electrical system fails, the leveling function of the system can be achieved through the hand-operated leveling control device, and the leveling reliability is high. The components such as the hand-operated pump and the hand-operated reversing valve are all arranged on the elevating working platform and directly controlled by personnel who work high above the ground, therefore, the leveling problem can be timely solved, the leveling system does no rely on control personnel in a control chamber any more, and the safety coefficient is improved.
Description
Technical field
The utility model relates to technical field of engineering machinery, particularly a kind of Elevating platform fire truck and hydraulic leveling system thereof.
Background technique
Aerial lift device, have chassis usually, and lifting arm support is installed, lifting arm support lifting truck work platform, and the operating personnel is positioned on the truck work platform, to realize height rescue or high-lift operation.Whole equipment generally has the operating table be positioned on chassis, by professional operator, is controlled.
Take truck as example, and its truck work platform need to remain the job state of relative level, so that the operating personnel can work.
Please refer to Fig. 1, the hydraulic leveling system schematic diagram that Fig. 1 is a kind of typical Elevating platform fire truck.
This hydraulic leveling system comprises electrohydraulic servo-controlling system, and this system comprises electrohydraulic control group 11, and servo-control system is done conventional leveling and controlled.Yet, in the middle of vehicle dispatches from the factory debugging or daily use, electrohydraulic control group 11 generation faults or electric leveling detection system fault may be encountered and the situation of leveling signal can't be transmitted, now, once the truck work platform occurs tilting, vehicle just can't be proceeded debugging, for carrying out the vehicle of operation, by serious threat operating personnel's the security of the lives and property.Especially huge Elevating platform fire truck, vehicle is in the high-lift operation more than 60 meters, once automatic leveling lost efficacy, consequence is even more serious.
At present, alternative scheme commonly used has following two kinds:
(1) emergency power supply is set, when main power source lost efficacy, emergency power supply is accessed to main hydraulic system;
(2) leveling system also arranges automatically controlled manual leveling system, as shown in Figure 1, mainly comprises solenoid directional control valve 12, and electrohydraulic control group 11 and solenoid directional control valve 12 all are communicated with in-line P, oil circuit T and leveling cyclinder 14 by valve piece 15.When automatic leveling servo-control system fault, use, automatically controlled manual leveling system and servo-control system adopt unified power source (main power source or emergency power supply), and automatically controlled manual leveling system is generally controlled by the professional operator of control cab.Make the charged manual leveling that realizes the truck work platform of solenoid directional control valve 12 by automatically controlled manual leveling, and, in the withdrawal process of truck work platform, need to adjust the truck work platform by the mode of manual leveling at any time and make it remain on the position of a relative level always.
In Fig. 1, the principle of manual automatically controlled leveling is: when solenoid directional control valve 12 in right when position, the pressure oil of in-line P enters the rodless cavity of leveling cyclinder 14 by solenoid directional control valve 12 first hydraulic fluid port A by pipeline, feed back oil circuit simultaneously and open the equilibrium valve 13 be communicated with rod chamber, rod chamber is communicated with oil circuit T by the second hydraulic fluid port B, thereby promote piston rod, stretch out, the truck work platform is rotated down.When solenoid directional control valve 12, in left when position, pressure oil enters leveling cyclinder 14 rod chambers by equilibrium valve 13 by the road by solenoid directional control valve 12 second hydraulic fluid port B, promotes piston rod and retracts, and the truck work platform rotates up.When solenoid directional control valve 12 is got back to meta, the hydraulic oil of rod chamber is balanced valve 13 and seals, and the truck work platform remains on the position after manual leveling.
As shown in Figure 1, the manual leveling of truck work platform is by controlling solenoid directional control valve 12 commutations, realizing the rotation up and down of truck work platform, thereby reach the leveling purpose fully.
Still there is following shortcoming in this leveling system:
One, realized separately the manual leveling of truck work platform by solenoid directional control valve 12, mode is single, and safety reliability is lower.Because the working state of solenoid directional control valve 12 directly determines the manual leveling effect, can not meet the urgency application demand; And solenoid directional control valve 12 and servo-control system all rely on electrical system to realize final leveling control, once electrical malfunction, truck work platform automatic leveling or manual leveling all can't realize, will directly affect operating personnel's safety like this
Two, automatically controlled manual leveling is without effective alternative scheme, and the independence of relatively electric liquid leveling system is not strong, and when main power source fault, back-up power source can not be used, the truck work platform can't be realized the leveling operation.
In view of this, how further improving the reliability of truck work platform erection, is those skilled in the art's technical problems urgently to be resolved hurrily.
The model utility content
For solving the problems of the technologies described above, the purpose of this utility model is for providing a kind of Elevating platform fire truck and hydraulic leveling system thereof.This leveling system makes the leveling of truck work platform control more reliable.
The hydraulic leveling system that the utility model provides, truck work platform for the leveling aerial lift device, hydraulic leveling system comprises leveling cyclinder and adjusts the automatically controlled levelling device of described leveling cyclinder, also comprise the manual leveling device, described manual leveling device comprises hydraulic power, and the hand pump, the hand-operated direction valve that are positioned at the truck work platform, described hydraulic power fuel feeding is to described hand pump;
Described hand-operated direction valve has at least three working positions, and in the first working position, the oil outlet of described hand pump is communicated with the rod chamber of described leveling cyclinder, the rodless cavity oil return; In the second working position, the oil outlet of described hand pump is communicated with the rodless cavity of described leveling cyclinder, the rod chamber oil return; In the 3rd working position, described leveling cyclinder rod chamber and rodless cavity, all disconnect with the oil circuit of described hand pump 25 and described manual leveling device.
In this system, the elements such as the hand pump of control leveling cyclinder, hand-operated direction valve are all manually controlled, do not rely on entire automobile electric system, when electrical system breaks down, when automatically controlled levelling device all can't carry out leveling work, this manual leveling control gear can be brought into play its levelling function, play good standby effect, the leveling reliability improves.Now, the elements such as hand pump, hand-operated direction valve all are placed on the truck work platform, by high-lift operation personnel direct regulation and control, solve in time the leveling problem, no longer rely on the operator in control cab, improve safety coefficient, also meet the type demand of pure manual regulating controller.
Preferably, described hydraulic power is the hydraulic oil container that is positioned at the truck work platform.
Preferably, described hydraulic oil container and described hand pump are integrated into integral module.
Preferably, described automatically controlled levelling device comprises the Servocontrol device of automatic leveling truck work platform, and automatically controlled manual leveling device; Described automatically controlled manual leveling device comprises controls described leveling cyclinder rod chamber, the mobile solenoid directional control valve of rodless cavity fluid.
Preferably, also comprise bidirectional hydraulic lock, described hand-operated direction valve is communicated with rod chamber and the rodless cavity of described leveling cyclinder by described bidirectional hydraulic lock.
Preferably, the pressure of described hand pump oil outlet is less than the in-line pressure of described Servocontrol device.
Preferably, described solenoid directional control valve also is communicated with rod chamber and the rodless cavity of described leveling cyclinder by described bidirectional hydraulic lock.
Preferably, the in-line pressure be communicated with described solenoid directional control valve is less than the in-line pressure of described Servocontrol device.
Preferably, described solenoid directional control valve is communicated with same in-line with described Servocontrol device.
The utility model also provides a kind of Elevating platform fire truck, comprises chassis and lifting arm support, and described lifting arm support is provided with the truck work platform, also comprises the described hydraulic leveling system of above-mentioned any one, the described truck work platform of described hydraulic leveling system leveling.
Because above-mentioned hydraulic leveling system has above-mentioned technique effect, the Elevating platform fire truck with this hydraulic leveling system also has identical technique effect.
The accompanying drawing explanation
The hydraulic leveling system schematic diagram that Fig. 1 is a kind of typical Elevating platform fire truck;
The structural representation of a kind of specific embodiment of hydraulic leveling system that Fig. 2 is ascending platform that the utility model provides;
Fig. 3 is the schematic diagram that in Fig. 2, hand-operated direction valve is connected with hand pump.
In Fig. 1:
11 electrohydraulic control groups, 12 solenoid directional control valves, 13 equilibrium valves, 14 leveling cyclinders, 15 valve pieces, A the first hydraulic fluid port, B the second hydraulic fluid port;
In Fig. 2-3:
21 leveling cyclinders, 22 equilibrium valves, 23 bidirectional hydraulic locks, 24 hand-operated direction valves, a1 the first hydraulic fluid port, a2 the second hydraulic fluid port, a3 the 3rd hydraulic fluid port, a4 the 4th hydraulic fluid port, 25 hand pumps, 26 hydraulic oil containers, 27 electrohydraulic control groups, 28 solenoid directional control valves
Embodiment
In order to make those skilled in the art understand better the technical solution of the utility model, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Please refer to Fig. 2-3, the structural representation of a kind of specific embodiment of hydraulic leveling system that Fig. 2 is ascending platform that the utility model provides; Fig. 3 is the schematic diagram that in Fig. 2, hand-operated direction valve is connected with hand pump.
Hydraulic leveling system in this embodiment, be mainly used in the truck work platform of leveling aerial lift device, and aerial lift device has multiple, such as fire-fighting truck, Hoisting Machinery etc.This hydraulic leveling system comprises the automatically controlled levelling device of leveling cyclinder 21 and adjustment leveling cyclinder 21, and automatically controlled levelling device is realized the leveling of leveling cyclinder 21 by automatical control system.
Leveling system in the present embodiment also comprises the manual leveling device, and the manual leveling device comprises hydraulic power, and the hand pump 25, the hand-operated direction valve 24 that are positioned at the truck work platform, and the hydraulic power fuel feeding is to hand pump 25.Hand pump 25 is the hydraulic-pressure pump that a kind of pure craft (machinery) drives, and such as single plunger pump, the high-lift operation personnel can provide power by extension lever or foot pedal apparatus.Hydraulic power can be hydraulic oil container 26 as shown in Figure 2, and hydraulic oil container 26 is independently opened with the hydraulic system of automatically controlled levelling device, and certainly, it is also feasible in theory that hand pump 25 adopts same hydraulic power with automatically controlled levelling device.
Hand-operated direction valve 24 has at least three working positions.Hand-operated direction valve 24 is in the first working position, and the oil outlet of hand pump 25 is communicated with the rod chamber of leveling cyclinder 21, and rodless cavity is communicated with the oil circuit of manual leveling device, with oil return; In the second working position, the oil outlet of hand pump 25 is communicated with the rodless cavity of leveling cyclinder 21, rod chamber oil return; In the 3rd working position, the oil circuit of the oil circuit of leveling cyclinder 21 rod chambers and rodless cavity and hand pump 25 and manual leveling device all disconnects and (just disconnecting with the oil circuit of manual leveling device, during normal the use, the oil circuit of automatically controlled levelling device still can be connected), the manual leveling device can't be adjusted the state of leveling cyclinder 21.
As shown in Figure 3, hand-operated direction valve 24 has the first hydraulic fluid port a1, the second hydraulic fluid port a2, the 3rd hydraulic fluid port a3 and the 4th hydraulic fluid port a4.Wherein, oil outlet, hydraulic oil container 26, the three hydraulic fluid port a3 and the 4th hydraulic fluid port a4 that the first hydraulic fluid port a1 and the second hydraulic fluid port a2 are communicated with respectively hand pump 25 is communicated with respectively rod chamber and the rodless cavity of leveling cyclinder 21.
This embodiment, the process of pure manual control leveling cyclinder 21 is as follows:
Manually control hand-operated direction valve 24 in left position (the first working position), the oil outlet of hand pump 25 is communicated with the 3rd hydraulic fluid port a3 of hand-operated direction valve 24 by the first hydraulic fluid port a1 of hand-operated direction valve 24, the oil outlet of hand pump 25 is communicated with the rod chamber of leveling cyclinder 21; The rodless cavity of leveling cyclinder 21 is communicated with the second hydraulic fluid port a2 by the 4th hydraulic fluid port a4, and rodless cavity is communicated with hydraulic oil container 26, but oil return.Now, leveling cyclinder 21 rod chamber oil-feeds, rodless cavity oil return, the truck work platform is under leveling cyclinder 21 driving effects, and up/down is rotated;
Manually control hand-operated direction valve 24 in right position (the second working position), oil circuit is just contrary to the above, and the oil outlet of hand pump 25 is communicated with the 4th hydraulic fluid port a4 by the first hydraulic fluid port a1, thereby is communicated with the rodless cavity of leveling cyclinder 21; The rod chamber of leveling cyclinder 21 is communicated with the second hydraulic fluid port a2 by the 3rd hydraulic fluid port a3, and rod chamber is communicated with hydraulic oil container 26 oil returns.Now, leveling cyclinder 21 rodless cavity oil-feeds, rod chamber oil return, the truck work platform is under leveling cyclinder 21 driving effects, downward/as to rotate up; Now the sense of rotation of truck work platform and above-mentioned adjustment direction are just the opposite.
Manually control hand-operated direction valve 24 in meta (the 3rd working position), four hydraulic fluid ports of hand-operated direction valve 24 disconnect mutually, the rodless cavity of leveling cyclinder 21 and rod chamber be neither oil-feed all, also not oil return, it is stable that the position of leveling cyclinder 21 keeps, correspondingly, the leveling state of truck work platform also remains unchanged.When the leveling state of truck work platform meets the requirements, can manually control hand-operated direction valve 24 in meta.
The rod chamber oil circuit of leveling cyclinder 21 can arrange equilibrium valve 22 as shown in Figure 2, and the control mouth of equilibrium valve 22 is communicated with the oil circuit of rodless cavity by oil circuit control, and when the rodless cavity oil-feed, equilibrium valve 22 is opened, the fluid proper flow; During the rod chamber oil-feed, fluid is directly through the one-way valve oil-feed of equilibrium valve 22, the rodless cavity oil return; When leveling is complete, under equilibrium valve 22 effects, leveling cyclinder 21 fluid are sealed, and the truck work platform remains on the position after leveling.
In this system, the elements such as the hand pump 25 of control leveling cyclinder 21, hand-operated direction valve 24 are all pure manual control, be that the manual leveling device is pure manual leveling device, do not rely on entire automobile electric system, when electrical system breaks down, when automatically controlled levelling device all can't carry out leveling work, this pure manual leveling control gear can be brought into play its levelling function, plays good standby effect, and the leveling reliability improves.Now, the elements such as hand pump 25, hand-operated direction valve 24 all are placed on the truck work platform, by high-lift operation personnel direct regulation and control, solve in time the leveling problem, no longer rely on the operator in control cab, improve safety coefficient, also meet the type demand of pure manual regulating controller.
Hand-operated direction valve 24 is not limited to above-mentioned three working positions, and more working position can also be set.Such as, a working position is set, while being positioned at this position, rod chamber and rodless cavity all are communicated with oil circuit or in-line; Or being positioned at this position, rod chamber, rodless cavity are interconnected, etc.According to actual user demand, correspondingly working position can be set, herein, mainly realize leveling and keep function, as long as being set, above-mentioned three working positions can meet user demand.
Hydraulic power in above-described embodiment preferably is chosen for the hydraulic oil container 26 be arranged on the truck work platform, as shown in Figure 2, hydraulic oil container 26 is both as the oil return fuel tank of leveling cyclinder 21, the oil circuit of manual leveling device is communicated with this hydraulic oil container 26, and hydraulic oil container 26 is also simultaneously as the hydraulic power of hand pump 25.Hydraulic oil container 26 can directly be installed on the truck work platform with elements such as hand pump 25, hand-operated direction valves 24, so that fuel feeding, to hand pump 25, also meets the timely oil return demand of leveling cyclinder 21 in time, makes the leveling speed of response accelerate; And hand pump 25 and hand-operated direction valve 24 rely on pure hand-guided, so design, the pipeline of fluid is shorter, compared to long pipe runs, is easier to realize pure hand-guided.In addition, hydraulic oil container 26 is independent of the hydraulic system of automatically controlled levelling device, makes pure manual leveling control and not limited by the electrical system of automatically controlled levelling device, not limited by hydraulic system, becomes fully independently leveling system.
Accordingly, hydraulic oil container 26 can be integrated into integral module with hand pump 25, and now, hydraulic oil container 26 can adopt the fuel tank of small volume.Hydraulic oil container 26 is generally just enabled when automatically controlled levelling device produces fault, therefore the oil mass demand of hydraulic oil container 26 is also little, the fuel tank of small volume and hand pump 25 are integrated into an integral module, can either reduce volume, be convenient to again as installed, reduce the leakage rate of hydraulic oil container 26 inner fluids.
For above-described embodiment, automatically controlled levelling device can comprise the Servocontrol device of automatic leveling truck work platform, and automatically controlled manual leveling device.Servocontrol device can as stated in the Background Art, comprise electrohydraulic control group 27 and corresponding electric control system, to realize automatic leveling.Automatically controlled manual leveling device comprises controls leveling cyclinder 21 rod chambers, the mobile solenoid directional control valve 28 of rodless cavity fluid, manually controlled electric, the dead electricity that obtains of solenoid directional control valve 28 by the operator, so that when Servocontrol device breaks down, as standby levelling device, use.The pure manual leveling control gear that Servocontrol device, automatically controlled manual leveling device and the present embodiment provide, realize the control of leveling cyclinder 21 jointly, when automatic leveling produces fault, can realize duplicate protection.
This manual leveling system also can comprise bidirectional hydraulic lock 23, and hand-operated direction valve 24 is communicated with rod chamber and the rodless cavity of leveling cyclinder 21 by this bidirectional hydraulic lock 23.As shown in Figure 2,3, the 3rd hydraulic fluid port a3 of hand-operated direction valve 24 and the 4th hydraulic fluid port a4 are connected to respectively two hydraulic fluid ports of bidirectional hydraulic lock 23.So, hand-operated direction valve 24 is when meta, and bidirectional hydraulic lock 23 is closed, and to guarantee pure manual leveling control gear, is not subject to the interference of other oil circuits.
Further, can make the pressure of hand pump 25 oil outlets be less than the in-line pressure of Servocontrol device.So, when Servocontrol device, during in normal working, as shown in Figure 2, hydraulic oil is normally by electrohydraulic control group 27.Suppose that the operating personnel on the truck work platform has carried out misoperation to pure manual leveling control gear, connected the oil circuit between hand-operated direction valve 24 and hand pump 25, hydraulic oil container 26, the input pressure that oil pressure is less than electrohydraulic control group 27 that goes out due to hand pump 25, regardless of the advancing of electrohydraulic control group 27, hand-operated direction valve 24, oil return direction, bidirectional hydraulic lock 23 can't form required pressure reduction, thereby can't normally open.Therefore, so design, even the high-lift operation personnel have carried out misoperation, can not make the automatic leveling Servocontrol device of normal operation and pure manual overvide produce interference yet, affects the leveling effect of leveling cyclinder 21.
In Fig. 2, solenoid directional control valve 28 also is communicated with rod chamber and the rodless cavity of leveling cyclinder 21 by this bidirectional hydraulic lock 23, and bidirectional hydraulic lock 23 also plays the effect of protection solenoid directional control valve 28.The in-line pressure that now, also can make to be communicated with solenoid directional control valve 28 is less than the in-line pressure of Servocontrol device.Consistent with above-mentioned discussion, during misoperation solenoid directional control valve 28, bidirectional hydraulic lock 23 can't normally be opened, and avoids automatically controlled manual leveling device and self-leveling Servocontrol device mutually to interfere, and affects the leveling effect of leveling cyclinder 21.
In Fig. 2, solenoid directional control valve 28 and hand-operated direction valve 24 are communicated to leveling cyclinder 21 by same bidirectional hydraulic lock 23, be appreciated that, the two respectively is communicated with leveling cyclinder 21 by a bidirectional hydraulic lock 23 is also feasible, and just the cost of design will be higher than the embodiment of above-mentioned same bidirectional hydraulic lock 23.Can expect on this basis, when only hand-operated direction valve 24 is communicated with leveling cyclinder 21 by bidirectional hydraulic lock 23, outlet pressure that also can hand pump 25 is set to be less than the in-line pressure of solenoid directional control valve 28, in order to avoid misoperation affects automatically controlled manual leveling; When the two is communicated with a two-way hydraulic lock 23 respectively, can make the in-line pressure of electrohydraulic control group 27 be greater than the in-line pressure of solenoid directional control valve 28, the in-line pressure of solenoid directional control valve 28 is greater than the input pressure of hand-operated direction valve 24, so that three kinds of levelling device mutual noninterferences.
In this embodiment, solenoid directional control valve 28 can be communicated with same in-line P with Servocontrol device, and as shown in Figure 2, solenoid directional control valve 28 is communicated with same in-line P with electrohydraulic control group 27, and the two also is communicated with same oil circuit T.Automatically controlled manual leveling device and Servocontrol device all belong to automatical control system, and the two is communicated with same in-line P, are convenient to realize unified control electric, hydraulic pressure.Certainly, the two to be communicated with different in-lines be also feasible.
In above-described embodiment, need to make solenoid directional control valve 28 in-line pressure and electrohydraulic control group 27 in-line pressure when different, under the prerequisite that is communicated with same in-line P, can realize by pressure regulatory element is set, such as reduction valve, damping etc.In like manner, while needing the input pressure of hand-operated direction valve 24 to be less than the input pressure of electrohydraulic control group 27, also can be accomplished in several ways.When adopting hand pump 25 as power source, its pressure is less than the main hydraulic system pressure of equipment usually, is less than the input pressure of electrohydraulic control group 27, without by other elements, possessing the pressure reduction demand.Certainly, hand pump 25 pressure are when larger, also can realize that pressure regulates by above-mentioned pressure regulatory element.
Except above-mentioned hydraulic leveling system, the utility model also provides a kind of Elevating platform fire truck, comprises chassis and lifting arm support, and lifting arm support is provided with the truck work platform, also comprise the described hydraulic leveling system as above-mentioned arbitrary embodiment, hydraulic leveling system leveling truck work platform.Because above-mentioned hydraulic leveling system has above-mentioned technique effect, the Elevating platform fire truck with this hydraulic leveling system also has identical technique effect.
Above a kind of Elevating platform fire truck provided by the utility model and hydraulic leveling system thereof all are described in detail.Applied specific case herein principle of the present utility model and mode of execution are set forth, above embodiment's explanation is just for helping to understand method of the present utility model and core concept thereof.Should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (10)
1. a hydraulic leveling system, truck work platform for the leveling aerial lift device, hydraulic leveling system comprises leveling cyclinder (21) and adjusts the automatically controlled levelling device of described leveling cyclinder (21), it is characterized in that, also comprise the manual leveling device, described manual leveling device comprises hydraulic power, and the hand pump (25), the hand-operated direction valve (24) that are positioned at the truck work platform, and described hydraulic power fuel feeding is to described hand pump (25);
Described hand-operated direction valve (24) has at least three working positions, and in the first working position, the oil outlet of described hand pump (25) is communicated with the rod chamber of described leveling cyclinder (21), rodless cavity oil return; In the second working position, the oil outlet of described hand pump (25) is communicated with the rodless cavity of described leveling cyclinder (21), rod chamber oil return; In the 3rd working position, described leveling cyclinder (21) rod chamber and rodless cavity, all disconnect with the oil circuit of described hand pump (25) and described manual leveling device.
2. hydraulic leveling system as claimed in claim 1, is characterized in that, described hydraulic power is the hydraulic oil container (26) that is positioned at the truck work platform.
3. hydraulic leveling system as claimed in claim 2, is characterized in that, described hydraulic oil container (26) is integrated into integral module with described hand pump (25).
4. as the described hydraulic leveling system of claim 1-3 any one, it is characterized in that, described automatically controlled levelling device comprises the Servocontrol device of automatic leveling truck work platform, and automatically controlled manual leveling device; Described automatically controlled manual leveling device comprises controls described leveling cyclinder (21) rod chamber, the mobile solenoid directional control valve (28) of rodless cavity fluid.
5. hydraulic leveling system as claimed in claim 4, it is characterized in that, also comprise bidirectional hydraulic lock (23), described hand-operated direction valve (24) is communicated with rod chamber and the rodless cavity of described leveling cyclinder (21) by described bidirectional hydraulic lock (23).
6. hydraulic leveling system as claimed in claim 5, is characterized in that, the pressure of described hand pump (25) oil outlet is less than the in-line pressure of described Servocontrol device.
7. hydraulic leveling system as claimed in claim 5, is characterized in that, described solenoid directional control valve (28) also is communicated with rod chamber and the rodless cavity of described leveling cyclinder (21) by described bidirectional hydraulic lock (23).
8. hydraulic leveling system as claimed in claim 7, is characterized in that, the in-line pressure be communicated with described solenoid directional control valve (28) is less than the in-line pressure of described Servocontrol device.
9. hydraulic leveling system as claimed in claim 7, is characterized in that, described solenoid directional control valve (28) is communicated with same in-line with described Servocontrol device.
10. an Elevating platform fire truck, comprise chassis and lifting arm support, described lifting arm support is provided with the truck work platform, it is characterized in that, also comprise as the described hydraulic leveling system of claim 1-9 any one the described truck work platform of described hydraulic leveling system leveling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203616675U CN203335500U (en) | 2013-06-21 | 2013-06-21 | Elevating platform fire truck and hydraulic leveling system thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203616675U CN203335500U (en) | 2013-06-21 | 2013-06-21 | Elevating platform fire truck and hydraulic leveling system thereof |
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| CN203335500U true CN203335500U (en) | 2013-12-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277355A (en) * | 2013-06-21 | 2013-09-04 | 徐州重型机械有限公司 | Elevating platform fire truck and hydraulic leveling system thereof |
| CN113682985A (en) * | 2021-09-09 | 2021-11-23 | 大洋泊车股份有限公司 | Method for adjusting perpendicularity of telescopic arm of elevating platform fire truck |
-
2013
- 2013-06-21 CN CN2013203616675U patent/CN203335500U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277355A (en) * | 2013-06-21 | 2013-09-04 | 徐州重型机械有限公司 | Elevating platform fire truck and hydraulic leveling system thereof |
| CN113682985A (en) * | 2021-09-09 | 2021-11-23 | 大洋泊车股份有限公司 | Method for adjusting perpendicularity of telescopic arm of elevating platform fire truck |
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Effective date of registration: 20170213 Address after: 221000 Jiangsu Province, Xuzhou City Yunlong District No. 165 Patentee after: XCMG FIRE-FIGHTING SAFETY EQUIPMENT Co.,Ltd. Address before: 221004 Xuzhou, Zhejiang Province, Jiangsu Road No. 165 Patentee before: Xuzhou Heavy Machinery Co.,Ltd. |
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Granted publication date: 20131211 |