NZ732662B - Vehicle with a low gravity centre and aerial work platform - Google Patents
Vehicle with a low gravity centre and aerial work platformInfo
- Publication number
- NZ732662B NZ732662B NZ732662A NZ73266217A NZ732662B NZ 732662 B NZ732662 B NZ 732662B NZ 732662 A NZ732662 A NZ 732662A NZ 73266217 A NZ73266217 A NZ 73266217A NZ 732662 B NZ732662 B NZ 732662B
- Authority
- NZ
- New Zealand
- Prior art keywords
- box
- vehicle
- vehicle frame
- telescopic
- aerial work
- Prior art date
Links
- 230000005484 gravity Effects 0.000 title claims abstract description 18
- 239000002828 fuel tank Substances 0.000 claims abstract description 22
- 230000005540 biological transmission Effects 0.000 claims description 46
- 239000000463 material Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 239000000446 fuel Substances 0.000 claims description 3
- 230000003247 decreasing Effects 0.000 abstract description 5
- 210000000245 Forearm Anatomy 0.000 description 22
- 238000010276 construction Methods 0.000 description 7
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 230000000875 corresponding Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010420 art technique Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing Effects 0.000 description 1
- 238000004642 transportation engineering Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B35/00—Safety belts or body harnesses; Similar equipment for limiting displacement of the human body, especially in case of sudden changes of motion
- A62B35/0043—Lifelines, lanyards, and anchors therefore
- A62B35/0075—Details of ropes or similar equipment, e.g. between the secured person and the lifeline or anchor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
- B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
- B66C23/705—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by hydraulic jacks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
- B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
- B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
- B66F11/044—Working platforms suspended from booms
- B66F11/046—Working platforms suspended from booms of the telescoping type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F13/00—Common constructional features or accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
- B66F17/006—Safety devices, e.g. for limiting or indicating lifting force for working platforms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/02—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms suspended from ropes, cables, or chains or screws and movable along pillars
- B66F7/04—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms suspended from ropes, cables, or chains or screws and movable along pillars hydraulically or pneumatically operated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/22—Lifting frames, e.g. for lifting vehicles; Platform lifts with tiltable platforms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/28—Constructional details, e.g. end stops, pivoting supporting members, sliding runners adjustable to load dimensions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/07513—Details concerning the chassis
Abstract
The present invention relates to the field of engineering mechanics and more particularly, relates to an engineering work vehicle, and most particularly, relates to a vehicle with a low gravity centre and aerial work platform. The vehicle includes a vehicle frame, a power system including an engine that provides power to the vehicle directly, a fuel tank, and a hydraulic tank all of which are mounted at a side of the frame along a length direction. A first box and a second box are installed on two sides of the vehicle frame along the length direction of the vehicle frame respectively; and the power system is contained in the first box, whereas the fuel tank and hydraulic tank are contained in the second box. The engine located in the first box and secured onto the vehicle frame through a bracket. A control box is disposed on the second box and is foldable into and out of the second box. A turning opening is defined at a side of the second box for turning the control box into and out of the second box, and an upper edge is hinged to an upper edge of the turning opening. Correspondingly, the embodiment of the invention also provides an aerial work platform which provides better off-road performance and grade-ability, can work in complicated environment, and owns a longer horizontal reach and larger working range. Moreover, maintenance and repair cost are decreased, lifetime is extended, integrity is higher, and appearance looks better. that provides power to the vehicle directly, a fuel tank, and a hydraulic tank all of which are mounted at a side of the frame along a length direction. A first box and a second box are installed on two sides of the vehicle frame along the length direction of the vehicle frame respectively; and the power system is contained in the first box, whereas the fuel tank and hydraulic tank are contained in the second box. The engine located in the first box and secured onto the vehicle frame through a bracket. A control box is disposed on the second box and is foldable into and out of the second box. A turning opening is defined at a side of the second box for turning the control box into and out of the second box, and an upper edge is hinged to an upper edge of the turning opening. Correspondingly, the embodiment of the invention also provides an aerial work platform which provides better off-road performance and grade-ability, can work in complicated environment, and owns a longer horizontal reach and larger working range. Moreover, maintenance and repair cost are decreased, lifetime is extended, integrity is higher, and appearance looks better.
Description
Vehicle with a low gravity centre and aerial work platform
FIELD OF THE INVENTION
The present invention relates to field of engineering mechanics and more
particularly, relates to an engineering work vehicle, and most particularly, relates to a
vehicle with a low gravity centre and aerial work platform.
BACKGROUD OF THE INVENTION
Any discussion of the prior art throughout the specification should in no way
be considered as an admission that such prior art is widely known or forms part of
common general knowledge in the field.
Aerial work platform is an advanced aerial working mechanical device, and is
capable of significantly improving efficiency, safety, and comfort of operators at height,
and is also capable of reducing labour. Accordingly, it is widely employed in developed
countries. This aerial work platform is also extensively used in China in many fields
such as urban street lamp maintenance, tree trimming or the like. With rapid
development of Chinese economy, aerial work platform is increasingly required in
many situations such as engineering construction, industry installation, equipment
repair, workshop maintenance, ship manufacture, electric power, municipal
construction, airport, communications, city park, and transportation.
In a conventional aerial work platform, an engine, fuel tank and hydraulic tank
are all laterally mounted on a turret. However, as the turret is disposed on a vehicle
frame of the vehicle, a relatively high gravity centre is resulted for the vehicle. This
restricts off-road ability and grade-ability of the aerial work platform. In addition, this
also restricts horizontal reach of the aerial work platform. In other words, the horizontal
reach of an operation platform is limited.
However, the aerial work platform often runs in a complicated environment
and accordingly, it is required to make some improvement upon structure and/or
installation manner of relevant components of the vehicle. Therefore, there is need for
providing an aerial work platform to overcome drawbacks of above prior art aerial work
platform.
SUMMARY OF THE INVENTION
It is an object of the present invention to overcome or ameliorate at least one
of the disadvantages of the prior art, or to provide a useful alternative. It is also an
object of the present invention in one embodiment to address the above problems and
provide a vehicle with a low gravity centre and aerial work platform. In current
invention, power system, fuel tank and hydraulic tank are mounted at a side of a
vehicle frame of a vehicle to lower gravity centre of the vehicle and entire aerial work
platform, enhance off-road capability and grade-ability of the aerial work platform, and
increase horizontal reach of the aerial work platform, thereby enlarging working range
of the aerial work platform.
To realize this object, the present invention proposes a vehicle with a low
gravity centre for an aerial work platform. The vehicle includes a vehicle frame, a power
system including an engine that provides power to the vehicle directly, a fuel tank, and
a hydraulic tank all of which are mounted at a side of the frame along a length
direction.
Furthermore, a first box and a second box are installed on two sides of the
frame along the length direction of the frame respectively. The power system is
contained in the first box, whereas the fuel tank and hydraulic tank are contained in the
second box.
Specifically, the engine is located in the first box and secured onto the
vehicle frame through a bracket.
A control box is disposed on the second box and is foldable into and out of
the second box. A turning opening is defined at a side of the second box for turning
the control box into and out of the second box, and an upper edge is hinged to an
upper edge of the turning opening.
The power system, fuel tank, and hydraulic tank are all located at the side of
the vehicle frame of the vehicle such that the gravity centre of the aerial work platform
is lowered when these and other related components are full of related materials
Preferably, a damping device is disposed at a location where the engine and
bracket are connected together.
Preferably, the fuel tank ,hydraulic tank, and second box are integrally
formed.
Furthermore, the power system further includes a cooling component, a fuel
delivery component, and an intake-exhaust component.
Correspondingly, the present invention further provides an aerial work
platform including a vehicle with lower gravity centre as mentioned above, a telescopic
transmission component pivotably mounted on the vehicle, and an operation platform
disposed on a distal end of the telescopic transmission component.
Furthermore, a turret is disposed on the vehicle frame of the vehicle. One
end, away from the operation platform, of the telescopic transmission component, is
pivotably connected with the turret through a supporting arm. The operation platform is
connected with the telescopic transmission component via a telescopic connection
component. A supporting member is disposed between the supporting arm and
telescopic transmission component, and similarly, another supporting member is
placed between the telescopic transmission component and telescopic connection
component.
Compared with prior art techniques, the present invention brings the following
good effects:
In present invention, as the power system, fuel tank, and hydraulic tank are
all located at one side of the vehicle frame, and the total weight of these and other
related components amounts to 1000Kg-1500Kg after injection of related materials, the
gravity centre of the aerial work platform is able to be lowered by 0.4m-0.6m, thus
strongly improving off-road performance and grade-ability of the entire platform.
Accordingly, the aerial work platform is able to run under various complex
environments. In addition, the horizontal reach of the aerial work platform is also
increased, and work range of the same is also extended.
Correspondingly, the power system is disposed in the first box, while the fuel
tank and hydraulic tank is disposed in the second box. The first and second boxes are
able to protect relevant components therein effectively, avoiding collision of these
components with external objects and thereby avoiding damages to the same. This
also decreases dust and aging of the components and therefore, further reduces cost
of maintenance and repair, and extends life of the components. Moreover, as a
damping device is provided between the engine and bracket, damage to the engine
due to vehicle shake during running of the aerial work platform is effectively prevented,
thus further reducing cost of maintenance and repair, and extending life of the
components. Moreover, as the fuel tank ,hydraulic tank, and second box are integrally
formed, manufacture and installation is convenient, the entire construction is simple
and compact, and appearance is good.
In a summary, the inventive aerial work platform has better off-road
performance and grade-ability, can work in complicated environment, and owns a
longer horizontal reach and larger working range. Moreover, maintenance and repair
cost is decreased, lifetime is extended, integrity is higher, and appearance looks better.
Unless the context clearly requires otherwise, throughout the description and
the claims, the words “comprise”, “comprising”, and the like are to be construed in an
inclusive sense as opposed to an exclusive or exhaustive sense; that is to say, in the
sense of “including, but not limited to”.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 shows a schematic view of an aerial work platform in accordance
with a typical embodiment of the invention;
Figure 2 shows a view of a vehicle of figure 1;
Figure 3 illustrates another view of the vehicle of figure 1 showing internal
construction of a second box;
Figure 4 illustrates another view of the vehicle of figure 1 showing internal
construction of a first box;
Figure 5 illustrates another view of the vehicle of figure 1 showing internal
construction of an engine and second box;
Figure 6 shows a partially enlarged view of portion M of figure 1;
Figure 7 illustrates another view of a front component of the aerial work
platform of figure 1, the front component including a telescopic connection component,
an operation platform, and relevant connection components;
Figure 8 shows a schematic view of a telescopic transmission component of
the aerial work platform of figure 1;
Figure 9 shows a partially enlarged view of portion A of figure 8;
Figure 10 shows a partially enlarged view of portion B of figure 8;
Figure 11 shows a view of the telescopic transmission component of figure 8
in an expanded configuration;
Figure 12 denotes a structural view of internal major transmission members
of the telescopic transmission component of figure 8, the major transmission members
including a first sprocket wheel, a second sprocket wheel, a rope-expanding chain, a
rope-retracting chain, and a retractable cylinder;
Figure 13 shows a schematic view of internal major transmission members of
the telescopic transmission component of figure 8;
Figure 14 shows a schematic view of internal major transmission members of
the telescopic transmission component of figure 8;
Figure 15 denotes a structural view of the retractable cylinder of the
telescopic transmission component of figure 8;
Figure 16 shows a partially enlarged view of portion C of figure 15; and
Figure 17 illustrates a view of a front component of an aerial work platform
according to another embodiment of the invention.
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be further described below with reference to
accompanied drawings and exemplary embodiments. Here, identical numerals
represent the identical components. In addition, detailed description of prior art will be
omitted if it is unnecessary for illustration of the features of the present invention.
Figures 1-16 show a typical embodiment of an aerial work platform of the
present invention. The aerial work platform includes a vehicle 1, a telescopic
transmission component 2 pivotably installed on the vehicle 1, and an operation
platform 3 connected to a distal end of the telescopic transmission component 2 via a
telescopic connection component 5.
It is noted that the vehicle 1 includes a vehicle frame 102, a driving system, a
fuel tank 121, and a hydraulic tank 122. The driving system includes a power system, a
transmission mechanism, a control system, a driving mechanism, and a wheel
assembly. The power system, fuel tank 121 and hydraulic tank 122 are all installed at a
side of the frame 102 along a length direction of the frame 102. A turret 101 is provided
on an upper end of the frame 102 of the vehicle 1. One end, away from the operation
platform 3, of the telescopic transmission component 2, is pivotably connected with the
turret 101 through a supporting arm 4. The operation platform 3 is coupled with the
telescopic transmission component 2 by means of a telescopic connection component
. A supporting member (for example a cylinder with kinds of functions) is disposed
between the supporting arm 4 and telescopic transmission component 2, and similarly,
another supporting member is placed between the telescopic transmission component
2 and telescopic connection component 5.
Reference is made to figures 1-5. Fixed to two lateral sides of the vehicle
frame 102 respectively along its length direction are a first box 11 and a second box
12. The power system is contained in the first box 11, whereas the fuel tank 121 and
hydraulic tank 122 are located in the second box 12. The power system includes an
engine 112, a cooling component, a fuel delivery component, and an intake-exhaust
component. The engine 112 is positioned in the first box 11 and is mounted onto the
frame 102 by a bracket 114. A damping device (not shown) is disposed at a location
where the engine 112 and bracket 114 are connected together. The fuel tank
121 ,hydraulic tank 122, and second box 12 are integrally formed. In addition, a
control box 123 is disposed on the second box 12 and is foldable into and out of the
second box 12. The control box 123 is electrically connected with the control system.
Specifically a turning opening 124 is defined at a side of the second box 12 for turning
the control box 123 into and out of the second box 12. An upper edge (See orientation
of the control box in figure 3 of control box 123) is hinged to an upper edge of the
turning opening 124. The height of the control box 123 relative to the ground is such
designed that, when the control box 123 is rotated out of the second box 12 through
the turning opening 124, an operator standing on the ground will be able to comfortably
get access to the control box 123. In addition, relevant control devices may be provided
on the operation platform 3 and be coupled with the control system electrically.
In a summary, as the power system, fuel tank 121, and hydraulic tank 122
are all located at a side of the vehicle frame 102 of the vehicle 1, and the total weight of
these and other related components amounts to 1000Kg-1500Kg after injection of
related materials, the gravity centre of the aerial work platform is able to be lowered by
0.4m-0.6m, thus strongly improving off-road performance and grade-ability of the entire
platform. Accordingly, the aerial work platform is able to run under various complex
environments. In addition, the horizontal reach of the aerial work platform is also
increased, and work range of the same is also extended.
The telescopic connection component 5 includes an outer arm 51, an inner
arm 52 slidably disposed inside the outer arm 51 and capable of being moved out from
one end of the outer arm 51, and a forearm telescopic cylinder 53 disposed between
the outer arm 51 and inner arm 52.
It is noted that the forearm telescopic cylinder 53 includes a cylinder body
(not shown) and a piston rod (not shown) slidably disposed into the cylinder body.
Preferably, the cylinder body is secured onto an outer wall of the outer arm 51, and an
extension end of the piston rod is secured onto an outer wall of the inner arm 52.
A first levelling cylinder 55 is disposed between the telescopic transmission
component 2 and telescopic connection component 5. A forearm head 54 is hinged to
one end, which is connected to the telescopic transmission component 2, of the
telescopic connection component 5. One end of the first levelling cylinder 55 is hinged
to the telescopic transmission component 2, while the other end thereof is hinged to the
forearm head 54. The telescopic connection component 5 further includes a forearm
luffing cylinder 57 one end of which is hinged to the forearm head 54, while the other
end thereof is hinged to the outer wall of the outer arm 51. By this means, the forearm
head 54, outer arm 51 and forearm luffing cylinder 57 constitute a triangle luffing
mechanism.
It is noted that the forearm head 54, outer arm 51 and telescopic
transmission component 2 are hinged together by a pin 512. The first levelling cylinder
55, forearm head 54, forearm luffing cylinder 57 and outer arm 51 constitute a four-bar
linkage. Moreover, the first levelling cylinder 55 may operate electrically or
hydraulically. In case operating under electric manner, an angle sensor (not shown)
matched with the first levelling cylinder 55 is installed on the pin 512 which hinges the
forearm head 54, outer arm 51 and telescopic transmission component 2 together. In
case operating under hydraulic manner, a hydraulic levelling device matched with the
first levelling cylinder 55 is disposed on the telescopic transmission component 2.
Preferably, the first levelling cylinder 55 works in electrical levelling manner.
Here, the forearm head 54 may be levelled by pushing and pulling motion of
the first levelling cylinder 55 upon the head 54. Specifically, an angle sensor installed
on the forearm head 54 sets an angle of the head 54 as zero. During luffing of the
telescopic transmission component 2, the forearm head 54 will tilt accordingly. As a
result, angle signal of the forearm head 54 will be sent to a corresponding controller
through the angle sensor. After receiving the signal, the controller will generate a
corresponding command to cause telescopic motion of the first levelling cylinder 55,
thereby realizing levelling of the forearm head 54. In other words, the forearm head 54
is controlled to be oriented at its predefined zero angle. In addition, up and down luffing
of the telescopic connection component 5 may also be realized by telescopic
movement of the forearm luffing cylinder 57.
Furthermore, a third levelling cylinder 58 is disposed between the telescopic
connection component 5 and operation platform 3. One end of the third levelling
cylinder 58 is hinged to the inner arm 52, whereas the other end thereof is hinged to a
rotary cylinder 33 secured onto the operation platform 3.
Preferably, a second levelling cylinder 56 is positioned between the forearm
head 54 and telescopic connection component 5. One end of the second levelling
cylinder 56 is hinged to the forearm head 54, while the other end thereof is hinged to
the outer wall of the outer arm 51. A cavity of the second levelling cylinder 56
communicates with a cavity of the third levelling cylinder 58 by means of an oil tube.
It is noted that arrangement of the second levelling cylinder 56 and third
levelling cylinder 58 avoids tilting of the operation platform 3 during luffing of the
telescopic connection component 5. In other words, the operation platform 3 is always
maintained at a horizontal location during luffing of the telescopic connection
component 5. Accordingly, the second levelling cylinder 56 and third levelling cylinder
58 have a second level of levelling function (the first levelling cylinder 55 and
associated device realize a first level of levelling function). As the cavity of the second
levelling cylinder 56 communicates with that of the third levelling cylinder 58 by an oil
tube, levelling may be achieved by adjusting telescopic motion of the second and third
levelling cylinders 56 and 58. The detailed levelling processing is described below.
When the telescopic connection component 5 luffs upwardly, a telescopic rod of the
forearm luffing cylinder 57 comes out and at the same time, a telescopic rod of the
second levelling cylinder 56 also comes out. At this time, hydraulic medium inside a rod
chamber of the second levelling cylinder 56 flows under pressure into a rod chamber of
the third levelling cylinder 58. Next, a telescopic rod of the third levelling cylinder 58
retracts, and hydraulic medium contained inside the non-rod chamber of the third
levelling cylinder 58 flows into a non-rod chamber of the second levelling cylinder 56
through an oil tube so as to realize levelling by balancing pressure inside relevant
chambers of the second and third levelling cylinders 56 and 58. This principle also
applies when the telescopic connection component 5 luffs downwardly except for
flowing direction of hydraulic medium and movement direction of relevant components.
Here, cross section areas of the cylinders, telescopic rods of the second and third
levelling cylinders 56 and 58, and traveling distances of the telescopic rods thereof are
predefined and matched among each other.
Reference is made to figures 1 and 6-16 illustrating a typical embodiment of
a telescopic transmission component of the aerial work platform of the invention. The
telescopic transmission component 2 includes a base arm 21, a second arm 22, a third
arm, a telescopic cylinder 24, a rope-expanding chain 27, and a rope-retracting chain
The second arm 22 is inserted into the base arm 21 and is able to move out
of the base arm 21 (See an upper portion of figure 11). The third arm 23 is inserted into
the second arm 22 and is capable of coming out of an extension end of the same (See
an upper portion of figure 11).
The telescopic cylinder 24 includes a cylinder barrel 241 secured onto the
second arm 22 and a telescopic rod 242 inserted into the barrel 241. The telescopic
rod 242 has a hollow arrangement 247 communicating with a cavity of the cylinder
barrel 241. An oil guiding tube 245 is provided into the hollow arrangement 247 of the
telescopic rod 242, and the extension end of the telescopic rod 242 is secured onto the
base arm 21 (See a lower portion of figure 13). Preferably, an end surface of the
extension end of the telescopic rod 242 is fixed to the base arm 21 through a mounting
plate 8. A connection portion is provided on the cylinder barrel 241 at a location
adjacent to the extension end of the telescopic rod 242 for securing the barrel 241 to
the second arm 22. The connection portion may in the form of an axle hole. That is, the
cylinder barrel 241 may be mounted on the second arm 22 by inserting a pin into said
axle hole. Of course, the connection portion of the barrel 241 may also be designed to
locate at other positions of the barrel 241, for example at a middle position.
Moreover, a first sprocket wheel 25 is provided on the telescopic cylinder 24,
a second sprocket wheel 26 is provided on the second arm 22, and the second
sprocket wheel 26 is closer to the extension end of the cylinder barrel 241 than does
the first sprocket wheel 25. One end of the rope-expanding chain 27 is attached onto
the base arm 21, while the other end thereof runs around the first sprocket wheel 25
and then is attached onto the third arm 23. In other words, the two ends of the rope-
expanding chain 27 are both located below the first sprocket wheel 25(See orientation
of figures). One end of the rope-retracting chain 28 is attached onto the third arm 23,
while the other end thereof runs around the second sprocket wheel 26 and then is
attached onto the base arm 21. In other words, the two ends of the rope-retracting
chain 28 are both located above the second sprocket wheel 26(See orientation of
figures). Preferably, the first sprocket wheel 25 is located on a cylinder head, which
cylinder head is located at one end away from an extension end, of the telescopic
cylinder 24. The second sprocket wheel 26 is located on the second arm 22 at a
location adjacent to the extension end of the telescopic rod 242. By this manner, the
first and second sprocket wheels 25 and 26 are capable of being positioned above and
below the cylinder barrel 241(See orientation of figures). This ensures stable
movement of the cylinder barrel 241 and accordingly, it also ensures stable rotation
and telescopic motion of relevant components. Of course, the first and second sprocket
wheels 25 and 26 may also be positioned at other suitable locations. For instance, the
first sprocket wheel 25 may be located at a middle area of the cylinder barrel 241, and
the second sprocket wheel 26 may be placed on the second arm 22 at a location close
to a middle portion of the cylinder barrel 241.
As shown in figures 15-16, an inner cavity of the cylinder barrel 241 of the
telescopic cylinder 24 is separated to form a rod chamber 244 and a non-rod chamber
243. In other words, partial space of the inner cavity of the barrel 241 overlaps the
telescopic rod 242 and thus forms the rod chamber 244. Partial space of the inner
cavity of the barrel 241 doesn’t overlap the rod 242 and locates at a upper right side
(See figure 16) of a distal end of the telescopic rod, and accordingly, forms the non-rod
chamber 243. The hollow arrangement 247 of the telescopic rod 242 communicates
with the rod chamber 244 via a connection path 246. The hollow arrangement 247 of
the rod 242 together with the oil guiding tube 245 inside the arrangement 247 is
communicated with an external oil tube.
Furthermore, one end of the rope-retracting chain 28 is attached onto the
third arm 23 by means of a chain connection member 29, similarly, one end of the
rope-expanding chain 27 is also attached onto the third arm 23 by means of the chain
connection member 29, and the two ends are located at two sides of the chain
connection member 29. By this manner, motions of the rope-expanding chain 27, rope-
retracting chain 28 and third arm 23 are coordinated among each other. Alternatively,
the rope-expanding chain 27 and rope-retracting chain 28 may be connected to the
third arm 23 with different connective members.
Moreover, a chain detection device is provided on the rope-expanding chain
27 for real time detecting status of related chain. When a chain is broken or exceeds a
predefined loose value, the chain detection device will generate alert signals to
guarantee safety of the telescopic transmission component 2, and further guarantee
safety of operators and other staff. In particular, the chain detection device may be
disposed on the rope-expanding chain 27 at one end thereof where the chain 27 is
connected to the base arm 21.
Preferably, all of the base arm 21, second arm 22 and third arm 23 are of
hollow arrangement. It is noted that these arms are by no means limited to this hollow
arrangement, and in fact they may be of other constructions.
Furthermore, these hollow arrangements of the base arm 21, second arm 22
and third arm 23 form a telescopic cavity into which the telescopic cylinder 24, first
sprocket wheel 25, second sprocket wheel 26, rope-expanding chain 27 and rope-
retracting chain 28 are received, thus leading to a compact structure for the telescopic
transmission component 2, and further reducing wear and aging of the components,
thereby extending lifetime. This also reduces repair and maintenance frequency and
makes it more convenient to repair and maintain the same, thus decreasing related
costs. In addition, to certain extent these components are not exposed outside and
accordingly, risk of operators being injured due to unintentional collision with the
components is also reduced. Of course, it is also feasible to place the telescopic
cylinder 24, first sprocket wheel 25, second sprocket wheel 26, rope-expanding chain
27 and rope-retracting chain 28 outside the telescopic cavity (that is, place them onto
the outer walls of the base arm 21, second arm 22 and third arm 23).
In a summary, as the telescopic rod 242 is secured onto the base arm 21,
when driven by suitable liquid medium, the cylinder barrel 241 will move upwardly
together with the second arm 22 such that the second arm 22 will move out of the base
arm 21. In turn, under the traction of the rope-expanding chain 27 and first sprocket
wheel 25, the third arm 23 is pulled to move out of an upper end of the second arm 22.
With continuous injection of the liquid medium into the cylinder barrel 241, the second
arm 22 and third arm 23 will continue to move toward the upper end until desired travel
distance or maximum predefined distance is reached. During this movement, the first
sprocket wheel functions as a movable pulley, and in this situation, displacement of the
third arm 23 relative to the base arm 21 is two times as long as a travel distance of the
cylinder barrel 241 (the distance of the second arm 22 with respect to the base arm
21). In this case, telescopic distance is certainly extended.
When oil enters the rod chamber 244 of the cylinder barrel 241 through the
hollow arrangement 247 of the telescopic rod 242, the barrel 241 will drive the second
arm 22 to move together downwardly such that the second arm 22 will retract from the
upper end of the base arm 21. In turn, the third arm 23 will retract into the second arm
22 when driven by the rope-retracting chain 28 and second sprocket wheel 26. With
continuous oil injection into the telescopic rod 242, the second arm 22 and third arm 23
will continuously retract towards a low end until a desired retracting location or
complete retracting location is reached. During this retraction, the second sprocket
wheel 26 works as a movable pulley such that the displacement of the third arm 23
relative to the base arm 21 is two times as long as the travel distance of the cylinder
barrel 241 (that is, the distance of the second arm 22 relative to the base arm 21).
Specifically, please refer to figure 1 and other related figures, the third arm 23
is hinged to the operation platform 3 by said telescopic connection component 5. In
other words, the third arm 23 is hinged to the outer arm 51 of the telescopic connection
component 5, and the inner arm 52 of the component 5 is connected with the operation
platform 3. The telescopic connection component 5 helps the operation platform 3
move further along a horizontal direction. The base arm 21 is hinged to the vehicle 1 by
the supporting arm 4 which is movably connected with relevant component of the
vehicle 1. In addition, a luffing cylinder 6 is disposed between the base arm 21 and
supporting arm 4. By this manner, the base arm 21, supporting arm 4 and luffing
cylinder 6 connected therewith also together define a reliable triangle construction. This
makes sure that the aerial work platform bears more stability and security.
When the aerial work platform requires extending its arms, the second and
third arms 22, 23 are controlled to extend of the telescopic transmission component 2.
At this time, the operation platform 3 coupled with the telescopic transmission
component 2 will also be extended when driven by the third arm 23. At this time,
relevant cylinder 6, supporting arm 4 and telescopic connection component 5 are also
controlled to adjust angle or location of relevant arms until the operation platform 3
moves to a predefined working location or a maximum extension distance is reached.
Similarly, when the aerial work platform requires withdrawing its arms, the
second and third arms 22, 23 of the telescopic transmission component 2 are
controlled to retract. At this time, the operation platform 3 coupled with the telescopic
transmission component 2 will also be retracted when driven by the third arm 23. At
this time, relevant cylinder 6, supporting arm 4 and telescopic connection component 5
are also controlled to adjust angle or location of relevant arms until the operation
platform 3 moves to a predefined working location or returns to its original location
without extension.
Moreover, please refer to figure 17 which illustrates another example of an
aerial work platform of the invention. This example is different from the above example
in that: a luffing cylinder 57 in place of relevant first level of levelling components of the
above example and serving as a supporting member is disposed between the
telescopic transmission component 2 and telescopic connection component 5; and the
third levelling cylinder 58 works in an electrical levelling manner other than hydraulic
levelling manner as described in above example, that is, an angle sensor 59
cooperating with the third levelling cylinder 58 is provided on the rotary cylinder 33.
When in operation, up and down luffing action of the telescopic connection
component 5 is realized by telescopic motion of the luffing cylinder 57 located between
the telescopic transmission component 2 and telescopic connection component 5.
Levelling of the operation platform is conducted by telescopic motion of the third
levelling cylinder 58, thus ensuring all time horizontal orientation of the platform.
Specifically, an angle sensor 59 installed on the rotary cylinder 33 sets a
location of the operation platform 3 as zero. During luffing motion of the telescopic
connection component 5, this angle sensor 59 will transmits electrical signals to a
corresponding controller which when receives the signals, will send control command
to cause telescopic motion of the third levelling cylinder 58, hence realizing levelling of
the operation platform. In other words, it is maintained that the operation platform is
always in its zero location.
Summarily, the inventive aerial work platform has better off-road performance
and grade-ability, can work in complicated environment, and owns a longer horizontal
reach and larger working range (it is extended by at least 1.2 meters than a prior art
aerial work platform). Moreover, maintenance and repair cost is decreased, lifetime is
extended, integrity is higher, and appearance looks better.
Though various embodiments of the present invention have been illustrated
above, a person of the art will understand that, variations and improvements made
upon the illustrative embodiments fall within the scope of the present invention, and the
scope of the present invention is only limited by the accompanying claims and their
equivalents.
Claims (6)
1. A vehicle with a low gravity centre for an aerial work platform, comprising a vehicle frame, a power system including an engine that provides power to the vehicle directly, a fuel tank, and a hydraulic tank all of which are mounted at a side of the vehicle frame along a length direction of the vehicle frame; a first box and a second box installed on two sides of the vehicle frame along the length direction of the vehicle frame respectively; wherein the power system is contained in the first box, whereas the fuel tank and hydraulic tank are contained in the second box; the engine located in the first box and secured onto the vehicle frame through a bracket; a control box is disposed on the second box and is foldable into and out of the second box; and a turning opening is defined at a side of the second box for turning the control box into and out of the second box, and an upper edge is hinged to an upper edge of the turning opening; wherein, the power system, fuel tank, and hydraulic tank are all located at the side of the vehicle frame of the vehicle such that the gravity centre of the aerial work platform is lowered when these and other related components are full of related materials.
2. The vehicle with a low gravity centre as recited in claim 1, wherein a damping device is disposed at a location where the engine and bracket are connected together.
3. The vehicle with a low gravity centre as recited in claim 1 or 2, wherein the fuel tank ,hydraulic tank, and second box are integrally formed.
4. The vehicle with a low gravity centre as recited in any one of claims 1 to 3, wherein the power system further comprises a cooling component, a fuel delivery component, and an intake-exhaust component.
5. An aerial work platform, comprising a vehicle with lower gravity centre as recited in any one of claims 1 to 4, a telescopic transmission component pivotably mounted on the vehicle, and an operation platform disposed on a distal end of the telescopic transmission component.
6. The aerial work platform as recited in claim 5, wherein a turret is disposed on the vehicle frame of the vehicle; one end, away from the operation platform, of the telescopic transmission component, is pivotably connected with the turret through a supporting arm; the operation platform is connected with the telescopic transmission component via a telescopic connection component; a supporting member is disposed between the supporting arm and telescopic transmission component, and, another supporting member is placed between the telescopic transmission component and telescopic connection component.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201610778675.8A CN106430018B (en) | 2016-08-31 | 2016-08-31 | Vehicle body with low gravity center and aerial work platform |
CN2016107786758 | 2016-08-31 |
Publications (2)
Publication Number | Publication Date |
---|---|
NZ732662A NZ732662A (en) | 2018-06-29 |
NZ732662B true NZ732662B (en) | 2018-10-02 |
Family
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