CN209554739U - A kind of levelling device for aerial work platforms - Google Patents
A kind of levelling device for aerial work platforms Download PDFInfo
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- CN209554739U CN209554739U CN201822251587.XU CN201822251587U CN209554739U CN 209554739 U CN209554739 U CN 209554739U CN 201822251587 U CN201822251587 U CN 201822251587U CN 209554739 U CN209554739 U CN 209554739U
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Abstract
The utility model discloses a kind of levelling devices for aerial work platforms, the levelling device includes cantilever crane, driving wheel, actively it is driven item, active auxiliary wheel, active leveling cyclinder, turntable, driven leveling cyclinder, driven auxiliary wheel, slave drive item, driven wheel and workbench, cantilever crane is connect with capstan drive, driving wheel is sequentially connected with item is actively driven, it is actively driven item and active leveling cyclinder is sequentially connected, active leveling cyclinder and driven leveling cyclinder are sequentially connected, driven leveling cyclinder and slave drive item are sequentially connected, slave drive item and driven wheel are sequentially connected.The utility model has many advantages, such as that leveling precision is high, levelling range is big, high reliablity, is applicable to various cantilever cranes.
Description
Technical field
The utility model is to be related to a kind of levelling device for aerial work platforms, belongs to technical field of fire safety.
Background technique
High-altitude operation vehicle or Elevating platform fire truck or fire-fighting truntable ladder are as a kind of common high altitude operation or rescue dress
It is standby, workbench is provided at the top of working arm.Vehicle carries out personnel's conveying by the movement of workbench and cantilever crane.In order to
The operation safety of personnel, vehicle are equipped with workbench self-level(l)ing device, work can be made flat to ensure cantilever crane during the motion
Platform is in horizontal or near-horizontal state always.Currently used workbench leveling mode can be divided into mechanical leveling, hydraulic tune
Three kinds of gentle electric leveling also has the case where various leveling modes are applied in combination in some compound cantilever cranes.Machinery leveling is substantially
It is divided into two kinds again, the first is parallel four-bar linkage, which is made of one group and several groups of parallelogram linkages, benefit
Remain that parallel principle levels workbench during exercise with two opposite side of parallelogram.Second is sprocket chain
Levelling mechanism, the mechanism are evolved by parallelogram, and each group of mechanism is by chain and the identical chain wheel set of two diameters
At a sprocket wheel is relatively fixed, and, to relatively rotate sprocket wheel, two sprocket wheels are respectively hinged at the luffing hinge at cantilever crane both ends for another
On, two sprocket wheels keep relative rotation constant by chain, and detailed schematic does not repeat.There are two groups of triangles in hydraulic leveling mechanism
Mechanism forms, and respectively has a leveling cyclinder in two groups of triangles, the rod chamber of two leveling cyclinders is connected with rod chamber, no bar
Chamber is connected with rodless cavity.It is flat to work using the approximately equal principle of the angle change of two groups of triangles during luffing range of cantilever support
Platform is leveled.Electric leveling mechanism is then that obliquity sensor is arranged on workbench, passes through sensor aware platform and water
The angle of plane drives workbench to level to safety clamp when deviateing safe angle by hydraulic actuating mechanism (such as oil cylinder)
In angular region.
Leveling precision, levelling range and leveling reliability are to measure three big important indicators of levelling device superiority and inferiority.Although with
There are many square formula of up-regulation, but there is limitation and defect, specific as follows:
Parallel four-bar linkage and sprocket wheel chain levelling mechanism are only used for on-telescopic cantilever crane, and connecting rod, chain are longer,
Occupied space is too big, and chain is longer, and flexible deformation is bigger, and the relative rotation deviation of two sprocket wheels is bigger, and leveling precision is got over
It is low；It for parallel four-bar linkage, is limited by structure space, the angular range that can be leveled is usually no more than 150 °, for adopting
The cantilever crane of luffing is carried out with link mechanism, for cantilever crane maximum change angle up in the case where 180 °, it is just uncomfortable that this kind levels mode
With.
The levelling mechanism of hydraulic cylinder triangle is since the characteristic by triangle is limited, and cantilever crane is in luffing movement, and two
The point of theory variation of group triangle is not proper equal.In fact, the angle change of two groups of triangles is approximate
The angular range of equal (deviation is within ± 1 °) is smaller, i.e., available leveling angular range is too small, the generally (meeting within 50 °
There are certain deviations), and the change angle of most cantilever cranes is leveled at 80 degree or more according to this kind of mode, leveling deviation is too
Greatly, the horizontal departure of hydraulic oil, the flexible deformation of hydralic hose and vehicle body, cumulative departure are adjusted up to 3 ° or more in addition
Flat precision is too low, increases the sense of discomfort and Psychological phobia of personnel in platform.
Electric leveling mode has leveling precision higher, the big advantage of leveling angle, but by electrical system component
It influences, compared to both the above mode, failure rate is higher, and reliability reduces.In addition, it is intermittent leveling that electric leveling is practical,
There are certain hysteresis quality, cantilever crane movement velocity is faster, and lagging feeling is more obvious, and increases the sense of discomfort of personnel in platform.
Utility model content
In view of the above problems existing in the prior art, the purpose of the utility model is to provide one kind have leveling precision it is high,
Levelling range is big, high reliablity, the levelling device for aerial work platforms for being applicable to various cantilever cranes.
To achieve the above object, the technical solution adopted in the utility model is as follows:
A kind of levelling device for aerial work platforms, including cantilever crane, driving wheel, be actively driven item, active auxiliary wheel,
Active leveling cyclinder, turntable, driven leveling cyclinder, driven auxiliary wheel, slave drive item, driven wheel and workbench, feature
Be: cantilever crane is connect with capstan drive, and driving wheel is sequentially connected with item is actively driven, and is actively driven item and active leveling cyclinder
Transmission connection, active leveling cyclinder and driven leveling cyclinder are sequentially connected, and driven leveling cyclinder and slave drive item are sequentially connected,
Slave drive item and driven wheel are sequentially connected.
Further, one end of active leveling cyclinder is connected at the straight line position for being actively driven item, active leveling cyclinder
The other end is fixed on turntable.
Further, the telescopic direction of active leveling cyclinder is parallel with the straight line portion for being actively driven item.
Further, one end of driven leveling cyclinder is connected at the straight line position of slave drive item, driven leveling cyclinder
The other end is fixed on cantilever crane.
Further, the telescopic direction of driven leveling cyclinder is parallel with the straight line portion of slave drive item.
Further, the driven wheel is identical as the drive diameter of driving wheel, rotation direction is opposite.
Further, the rodless cavity oil stream sectional area of active leveling cyclinder, rod chamber oil stream sectional area and driven leveling cyclinder
Rodless cavity oil stream sectional area, rod chamber oil stream sectional area difference it is identical.
Further, the rodless cavity of active leveling cyclinder and driven leveling cyclinder is interconnected and rod chamber is also interconnected.
Further, item and driving wheel and slave drive item are actively driven and driven wheel is all made of engagement type Synchronous Transmission,
It can be driven for chain sprocket, or synchronous belt and belt wheel transmission.
Further, one end of cantilever crane and driving wheel are coaxially hinged on turntable, and cantilever crane is relatively fixed with driving wheel.
Further, workbench and driven wheel are coaxially hinged on the other end of cantilever crane, and the driven wheel and work are flat
Platform is relatively fixed.
Further, the active auxiliary wheel is hinged on turntable, and the driven auxiliary wheel is hinged on cantilever crane.
Further, balanced valve is installed on the driven leveling cyclinder.
Compared to the prior art, the advantageous effects of the utility model are:
1, compared with the leveling mode of hydraulic cylinder triangle, leveling precision is higher.Due to active described in the utility model
The rotational angle of wheel and the change angle of cantilever crane can be strictly consistent, the rotational angle of driven wheel and the angle of rotation of workbench
Degree can be strictly consistent, and driving wheel is identical with the rotational angle of driven wheel, contrary, thus the angle of luffing range of cantilever support
Degree is identical with the rotational angle of workbench, contrary, to can ensure that cantilever crane in luffing motion process, work is flat
Platform remains horizontality.
2, compared with other mechanically and hydraulically level mode, leveling angular range is big, occupies little space.Because this is practical new
The leveling angle of type workbench depends on the stroke of driven leveling cyclinder and the transmission radius of driven wheel, and the parameter can root
According to needing to set, it is able to satisfy needs completely, the cantilever crane of wide-angle luffing is carried out especially for link mechanism.Furthermore it actively adjusts
Between flattening mechanism and driven levelling mechanism except hydraulic oil pipe be connected it is outer, centre again without other attachment devices, with the length of cantilever crane without
It closes, thus it is compact-sized, convenient for arrangement.
3, compared with electric leveling mode, which is made of hydraulic cylinder and mechanical device completely, independent of
It is higher to level reliability independent of the reasonability of automatically controlled program for the precision and reliability of sensor.
4, it is suitable for various forms of cantilever cranes, the utility model is applicable not only to simple telescopic arm or folds arm, for
The cantilever crane that multi-joint telescoping adds section folding type is equally applicable.
Detailed description of the invention
Fig. 1 is a kind of common flexible plus collapsible high-altitude operation vehicle cantilever crane structural schematic diagram；
The partial enlargement structural representation that Fig. 2 is in Fig. 1 I；
The partial enlargement structural representation that Fig. 3 is in Fig. 1 II；
The partial enlargement structural representation that Fig. 4 is in Fig. 1 III；
Catenation principle figure of the Fig. 5 between leveling cyclinder.
Figure label is schematically as follows: 1, turntable；2, bottom active levelling mechanism；2-1, bottom active leveling cyclinder；2-2,
Bottom active auxiliary wheel；2-3, bottom are actively driven item；2-4, bottom driving wheel；3, lower amplitude oil cylinder；4, lower arm；5, intermediate main
Dynamic levelling mechanism；5-1, intermediate active leveling cyclinder；5-2, intermediate active auxiliary wheel；5-3, centre are actively driven item；5-4, in
Between driving wheel；6, connecting rod jib lubbing mechanism；7, upper arm；8, driven levelling mechanism；8-1, driven leveling cyclinder；8-2, from dynamic auxiliary
Wheel；8-3, slave drive item；8-4, driven wheel；9, workbench；10, check valve；11, shuttle valve；12, balanced valve.
Specific embodiment
The technical solution of the utility model is described in further detail below in conjunction with drawings and examples.
Embodiment
It please refers to shown in Fig. 1: a kind of levelling device for aerial work platforms provided in this embodiment, including turntable 1,
Bottom active levelling mechanism 2, lower amplitude oil cylinder 3, lower arm 4, intermediate active levelling mechanism 5, connecting rod jib lubbing mechanism 6, upper arm 7, from
Dynamic levelling mechanism 8, workbench 9, check valve 10, shuttle valve 11 and balanced valve 12.
Turntable 1 described in the present embodiment is a kind of rotary platform, and the lower plane of turntable is horizontality；Under described
Arm 4 is a kind of telescopic structure, and one end of lower arm 4 and turntable 1 are articulated and connected using articulated connection, the other end and upper arm 7；It is described
One end of lower amplitude oil cylinder 3 is hinged on turntable 1, and the other end is hinged on lower arm 4, the flexible drive lower arm 4 of lower amplitude oil cylinder 3
Hinge around turntable 1 carries out pitching movement；The connecting rod jib lubbing mechanism 6 is a kind of common four-bar mechanism, by connection rod set and
Upper amplitude oil cylinder composition, by the driving of upper amplitude oil cylinder, four-bar mechanism drives upper arm 7 to carry out pitching around the hinge of lower arm 4
Movement；The upper arm 7 is a folding arm, and one end and the top of lower arm 4 are hinged, and the other end and workbench 9 are hinged；The work
Making platform 9 is a kind of manned working bucket, is articulated and connected with upper arm 7.
Please refer to shown in Fig. 2, active levelling mechanism in bottom described in the present embodiment 2 by bottom active leveling cyclinder 2-1,
Actively transmission 2-3, bottom driving wheel 2-4 composition, bottom active auxiliary wheel 2-2 are transmission for bottom active auxiliary wheel 2-2, bottom
Sprocket wheel, rotary shaft are fixed on turntable 1, and active auxiliary wheel 2-2 can be rotated around rotary shaft, and bottom driving wheel 2-4 is drive sprocket,
Be fixed on lower arm 4, rotary shaft and 4 luffing axis of lower arm are coaxial, bottom actively transmission 2-3 be synchronous transmission chain, be 2-2 and
The intermediate gearing of 2-4.Piston rod one end of bottom active leveling cyclinder 2-1 is fixed on bottom and is actively driven on a 2-3, cylinder
Cylinder one end is fixed on turntable 1, and the straight line portion of oil cylinder axis and bottom active transmission 2-3 remain parallel relation.
Please refer to shown in Fig. 3, intermediate active levelling mechanism 5 described in the present embodiment by intermediate active leveling cyclinder 5-1,
Intermediate active auxiliary wheel 5-2, intermediate actively transmission 5-3, centre driving wheel 5-4 composition, intermediate active auxiliary wheel 5-2 is transmission
Sprocket wheel, rotary shaft are fixed on lower arm 4, and active auxiliary wheel 5-2 can be rotated around rotary shaft.Intermediate driving wheel 5-4 is drive sprocket,
It is fixed on upper arm 7, rotary shaft and the luffing axis of upper arm 7 are coaxial；Intermediate actively transmission 5-3 is synchronous transmission chain, is 5-2
With the intermediate gearing of 5-4.Piston rod one end of intermediate active leveling cyclinder 5-1 is fixed on intermediate actively transmission 5-3,
Cylinder barrel one end is fixed on lower arm 4, and the straight line portion of oil cylinder axis and intermediate actively transmission 5-3 remain parallel relation.
Please refer to shown in Fig. 4, driven levelling mechanism 8 described in the present embodiment by driven leveling cyclinder 8-1, from dynamic auxiliary
8-2, slave drive 8-3, driven wheel 8-4 composition are taken turns, driven auxiliary wheel 8-2 is drive sprocket, and rotary shaft is fixed on upper arm 7
On, driven auxiliary wheel 8-2 can be rotated around rotary shaft.Driven wheel 8-4 be drive sprocket, be fixed on workbench 9, rotary shaft with
The upper-lower rotating shaft of workbench 9 is coaxial.Slave drive 8-3 is synchronous transmission chain, is the intermediate transmission dress of 8-2 and 8-4
It sets.Piston rod one end of driven leveling cyclinder 8-1 is fixed on slave drive 8-3, and cylinder barrel one end is fixed on upper arm 7, oil
The straight line portion of cylinder axis and slave drive 8-3 remain parallel relation.
Bottom active leveling cyclinder 2-1 described in the present embodiment, intermediate active leveling cyclinder 5-1, driven leveling cyclinder
The rodless cavity oil stream sectional area of 8-1 is identical and rod chamber oil stream sectional area is also identical；The bottom driving wheel 2-4, centre
Driving wheel 5-4, the transmission radius of driven wheel 8-4 are all the same.
Please refer to shown in Fig. 5, bottom active leveling cyclinder 2-1, intermediate active leveling cyclinder 5-1 rodless cavity pass through shuttle valve
11 are connected to the rodless cavity of driven leveling cyclinder 8-1.Bottom active leveling cyclinder 2-1, intermediate active leveling cyclinder 5-1 have bar
Chamber is connected to by shuttle valve 11 with the rod chamber of driven leveling cyclinder 8-1.In addition, bottom active leveling cyclinder 2-1, driven leveling oil
Between the rodless cavity of cylinder 8-1 be equipped with check valve 10, intermediate active leveling cyclinder 5-1, driven leveling cyclinder 8-1 rodless cavity between
Equipped with check valve 10, to ensure that the rodless cavity oil stream of 8-1 can smoothly flow to the rodless cavity of 2-1 or 5-1.Similarly, bottom master
Between dynamic leveling cyclinder 2-1 and the rod chamber of driven leveling cyclinder 8-1, centre active leveling cyclinder 5-1 and driven leveling cyclinder
Also check valve 10 is equipped between the rod chamber of 8-1.
Referring again to shown in Fig. 5, after bursting accident occurs for the sebific duct to ensure to be connected with driven leveling cyclinder 8-1, oil cylinder
Can reliably locking, balanced valve 12 is equipped on 8-1.
The levelling principle of levelling device provided in this embodiment for aerial work platforms are as follows:
What levelling mechanism first guaranteed workbench when assembling tramples plane and turntable lower plane keeping parallelism, when lower arm 4 into
When row luffing moves, lower arm 4 drives driving wheel 2-4 in bottom angularly to rotate, and bottom driving wheel 2-4 is actively driven by bottom
2-3 drives bottom active leveling cyclinder 2-1 to carry out straight line to stretch or contract movement.Bottom active leveling cyclinder 2-1 is same by oil liquid
Step drives driven leveling cyclinder 8-1 to carry out straight line contracting or stretches movement, and driven leveling cyclinder 8-1 is driven by slave drive 8-3
Driven wheel 8-4 is rotated, and driven wheel 8-4 driving workbench work 9 angularly turns with bottom driving wheel 2-4 opposite direction
It is dynamic, to realize the leveling work of workbench；Similarly, when upper arm 7 carries out luffing movement, upper arm 7 drives intermediate driving wheel
5-4 is angularly rotated, and intermediate driving wheel 5-4 drives intermediate active leveling cyclinder 5-1 to carry out by intermediate actively transmission 5-3
Straight line is stretched or contracts movement.Intermediate active leveling cyclinder 5-1 by the driven leveling cyclinder 8-1 of oil liquid synchronous drive carry out straight line contracting or
Movement is stretched, driven leveling cyclinder 8-1 drives driven wheel 8-4 to be rotated by slave drive 8-3, and driven wheel 8-4 drives work
Make the angularly rotation that platform makees 9 with intermediate driving wheel 5-4 opposite direction, to realize the leveling work of workbench.
From the foregoing, it will be observed that workbench can be by leveling machine above when either lower arm 4 or upper arm 7 carry out pitching movement
The angularly rotation of structure progress stringent in real time and lower arm 4 or upper arm 7 reversely, it is ensured that workbench 9 is lower flat with turntable 1 always
Face keeping parallelism, i.e. holding horizontality.
In summary as it can be seen that since the rotational angle of driving wheel described in the utility model and the change angle of cantilever crane can be stringent
It is consistent, the rotational angle of driven wheel and the rotational angle of workbench can be strictly consistent, and driving wheel and driven wheel
Rotational angle it is identical, contrary, thus the angle of luffing range of cantilever support it is identical with the rotational angle of workbench, side
To on the contrary, workbench remains horizontality, with hydraulic cylinder triangle to can ensure that cantilever crane in luffing motion process
The leveling mode of shape is compared, and leveling precision is higher；Also, because the leveling angle of utility model works platform is depending on driven
The stroke of leveling cyclinder and the transmission radius of driven wheel, and the parameter can be set as needed, and be able to satisfy needs completely, especially
It is the cantilever crane for carrying out wide-angle luffing for link mechanism, compared with other mechanically and hydraulically level mode, levels angular range
Greatly, it occupies little space.Furthermore between active levelling mechanism and driven levelling mechanism in addition to hydraulic oil pipe is connected, centre is again without it
His attachment device, it is unrelated with the length of cantilever crane, thus it is compact-sized, convenient for arrangement；Compared with electric leveling mode, the utility model
Levelling device is made of hydraulic cylinder and mechanical device completely, independent of the precision and reliability of sensor, independent of electricity
The reasonability of program is controlled, leveling reliability is higher, is applicable not only to simple telescopic arm or folds arm, multi-joint telescoping is added
The cantilever crane of section folding type is equally applicable；Therefore, the utility model compared with the existing technology, has marked improvement and practicability.
It is last it is necessarily pointed out that: the foregoing is merely the preferable specific embodiments of the utility model, but this
The protection scope of utility model is not limited thereto, and anyone skilled in the art discloses in the utility model
In technical scope, any changes or substitutions that can be easily thought of, should be covered within the scope of the utility model.
Claims (10)
1. a kind of levelling device for aerial work platforms, including cantilever crane, driving wheel, actively it is driven item, active auxiliary wheel, master
Dynamic leveling cyclinder, turntable, driven leveling cyclinder, driven auxiliary wheel, slave drive item, driven wheel and workbench, feature exist
In: cantilever crane is connect with capstan drive, and driving wheel is sequentially connected with item is actively driven, and is actively driven item and active leveling cyclinder passes
Dynamic connection, active leveling cyclinder and driven leveling cyclinder are sequentially connected, and driven leveling cyclinder and slave drive item are sequentially connected, from
Dynamic transmission item and driven wheel are sequentially connected.
2. levelling device according to claim 1, it is characterised in that: one end of active leveling cyclinder, which is connected to, to be actively driven
At the straight line position of item, the other end of active leveling cyclinder is fixed on turntable.
3. levelling device according to claim 2, it is characterised in that: the telescopic direction of active leveling cyclinder and actively transmission
The straight line portion of item is equal.
4. levelling device according to claim 1, it is characterised in that: one end of driven leveling cyclinder is connected to slave drive
At the straight line position of item, the other end of driven leveling cyclinder is fixed on cantilever crane.
5. levelling device according to claim 4, it is characterised in that: the telescopic direction and slave drive of driven leveling cyclinder
The straight line portion of item is parallel.
6. levelling device according to claim 1, it is characterised in that: driven wheel is identical as the drive diameter of driving wheel, turns
It moves contrary.
7. levelling device according to claim 1, it is characterised in that: the rodless cavity oil stream sectional area of active leveling cyclinder,
Rod chamber oil stream sectional area is identical as the rodless cavity oil stream sectional area of driven leveling cyclinder, rod chamber oil stream sectional area difference.
8. levelling device according to claim 1, it is characterised in that: active leveling cyclinder is with driven leveling cyclinder without bar
Chamber is interconnected and rod chamber is also interconnected.
9. levelling device according to claim 1, it is characterised in that: one end of cantilever crane and driving wheel are coaxially hinged on turntable
On, cantilever crane is relatively fixed with driving wheel；Workbench and driven wheel are coaxially hinged on the other end of cantilever crane, the driven wheel
It is relatively fixed with workbench；The active auxiliary wheel is hinged on turntable, and the driven auxiliary wheel is hinged on cantilever crane.
10. levelling device according to claim 1, it is characterised in that: be equipped with balance on the driven leveling cyclinder
Valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822251587.XU CN209554739U (en) | 2018-12-29 | 2018-12-29 | A kind of levelling device for aerial work platforms |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822251587.XU CN209554739U (en) | 2018-12-29 | 2018-12-29 | A kind of levelling device for aerial work platforms |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110921585A (en) * | 2019-11-07 | 2020-03-27 | 长沙中联消防机械有限公司 | Working bucket leveling device and overhead working truck |
| CN111302227A (en) * | 2020-02-28 | 2020-06-19 | 西安石油大学 | Multi-degree-of-freedom lifting platform device and automatic leveling method |
| CN113120819A (en) * | 2021-04-19 | 2021-07-16 | 江苏和润智能装备有限公司 | But multi-angle control high altitude workstation |
| CN114408824A (en) * | 2022-01-19 | 2022-04-29 | 徐州海伦哲专用车辆股份有限公司 | Platform leveling system based on boom springback control |
-
2018
- 2018-12-29 CN CN201822251587.XU patent/CN209554739U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110921585A (en) * | 2019-11-07 | 2020-03-27 | 长沙中联消防机械有限公司 | Working bucket leveling device and overhead working truck |
| CN111302227A (en) * | 2020-02-28 | 2020-06-19 | 西安石油大学 | Multi-degree-of-freedom lifting platform device and automatic leveling method |
| CN113120819A (en) * | 2021-04-19 | 2021-07-16 | 江苏和润智能装备有限公司 | But multi-angle control high altitude workstation |
| CN114408824A (en) * | 2022-01-19 | 2022-04-29 | 徐州海伦哲专用车辆股份有限公司 | Platform leveling system based on boom springback control |
| CN114408824B (en) * | 2022-01-19 | 2023-10-27 | 徐州海伦哲专用车辆股份有限公司 | Platform leveling system based on arm support rebound control |
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