U.S. patent number 3,792,781 [Application Number 05/152,865] was granted by the patent office on 1974-02-19 for hydraulic traveling crane construction.
This patent grant is currently assigned to Rheinstahl Union Aktiengesellschaft. Invention is credited to Helmut Blase, Richard Gorl.
United States Patent |
3,792,781 |
Blase , et al. |
February 19, 1974 |
HYDRAULIC TRAVELING CRANE CONSTRUCTION
Abstract
A hydraulically operated traveling crane includes a chassis or
support constructed and arranged to permit the crane to be operated
with a lattice boom or with a telescopic boom. The carrying chassis
includes plates which are mounted on a base and which include an
inclined front wall with a pivot bearing at the lower end for
either the lattice boom or for a whipping cylinder for a telescopic
boom. The upper end of the inclined front edge provides a rotatable
support for a pivot journal for a backdrop support for the lattice
boom or for the pivotal support for the telescopic boom. The
mounting plates on the carrying chassis include a rearward
extension providing a rotatable support for two rotatable pulleys
of the hoisting gear around which connecting cables for the
telescopic boom or the lattice boom or an extension of either may
be connected. The mounting platform of the chassis provides means
for mounting a support plate for cable winches which are employed
with the lattice boom and these may be easily removed when the
telescopic boom is positioned on the chassis. The cable winches
include the cable lines which are provided for raising and
adjusting the lattice boom. A pump unit for the hydraulic controls
is arranged below the rearward extension mounting the cable
winches. Guide pulleys for the boom cables are advantageously
mounted on a combining unit which includes an adjustable triangular
plate member mounting the pulleys.
Inventors: |
Blase; Helmut (Dortmund-Derne,
DT), Gorl; Richard (Dortmund, DT) |
Assignee: |
Rheinstahl Union
Aktiengesellschaft (Dortmund, DT)
|
Family
ID: |
5766617 |
Appl.
No.: |
05/152,865 |
Filed: |
June 14, 1971 |
Foreign Application Priority Data
|
|
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|
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Mar 28, 1970 [DT] |
|
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P 20 15 087.2 |
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Current U.S.
Class: |
212/178; 212/238;
212/298; 212/299; 212/175 |
Current CPC
Class: |
B66C
23/74 (20130101); B66C 23/36 (20130101); B66C
23/62 (20130101); B66C 2700/0371 (20130101) |
Current International
Class: |
B66C
23/00 (20060101); B66C 23/74 (20060101); B66C
23/36 (20060101); B66C 23/62 (20060101); B66c
023/06 () |
Field of
Search: |
;212/48,49,55,59 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Blunk; Evon C.
Assistant Examiner: Rowland; James L.
Attorney, Agent or Firm: McGlew and Tuttle
Claims
What is claimed is:
1. A hydraulic traveling crane operable with either a lattice boom
having a backdrop support or a telescopic boom having a whipping
cylinder, comprising a chassis having a platform (1) pivotally
mounted thereon, an upright bearing plate (6) carried on said
platform, a first pivot journal (2) mounted adjacent the front of
said bearing plate for selectively and alternatively pivotally
supporting a lattice boom (3) and a whipping cylinder (10) for
elevating and lowering a telescopic boom (3), a second pivot
journal (5) carried on said bearing plate above and behind the
first pivot journal for selectively and alternatively pivotally
supporting said telescopic boom and the backdrop support (4) for
said lattice boom, a load hoisting unit (24) including load
hoisting cable drums (8,9) mounted on said bearing plate adjacent
the rear thereof behind said second pivot journal, cable guide line
means adapted to be secured to the rear of said load hoisting unit
for raising and adjusting the lattice boom, the lattice boom being
adapted to be pivotally connected to said first pivot journal
adjacent said lower end and being adapted to be pivotally connected
to the backdrop support which is pivoted at its inner end to the
second pivot journal when it is in operation, and said telescopic
boom being adapted to be pivoted at its inner end to said second
pivot journal and to be pivoted intermediate the length thereof to
the whipping cylinder which is adapted to be pivoted at its
opposite end to the first pivot journal, said cable guide line
means including a cable winch unit detachably mounted on said
platform adjacent said bearing plate and having guide rollers for
operating the lattice boom and said bearing plate extending
rearwardly at its upper portion of the rear end thereof and being
connected to said load hoisting unit.
2. A hydraulic traveling crane, according to claim 1, including a
motor driven pump unit located below said hoisting unit on said
platform.
3. A hydraulic traveling crane, according to claim 1, including
guide roller means for guiding said lattice boom upwardly and
downwardly, and a guide roller mounting unit mounted adjacent the
rear of said hoisting pulley unit.
4. A hydraulic traveling crane, according to claim 3, wherein said
hoisting pulley unit and said guide roller unit are removably
mounted on said bearing plate, and means for suspending a
counterweight on said platform.
5. A hydraulic traveling crane, according to claim 1, including
boom adjusting winches detachably secured on said platform adjacent
said bearing plate.
6. A hydraulic traveling crane, according to claim 1, including a
hydraulic control and driving unit mounted on said platform for
operating selectively said lattice boom and said telescopic
boom.
7. A hydraulic traveling crane, according to claim 1, including an
upstanding suspension member extending upwardly from the rear of
said platform and a counterweight carried on said suspension
member.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates in general to the construction of lifting
cranes and, in particular, to a new and useful hydraulic traveling
crane having a rotatable upper carrying chassis constructed to be
operable with either a lattice boom or a telescopic boom which may
be adjusted in length by hydraulic means.
2. Description of the Prior Art
A hydraulic traveling crane is known which includes a fulcrum for a
telescopic boom and a separate fulcrum for a lattice boom which are
arranged at each end of the upper carrying chassis and which may be
employed for the selective attachment of one or the other boom as
well as for the attachment of hydraulic cylinders on the upper
carrying chassis for raising and adjusting the boom which is
attached. Such a known traveling crane has a particular
disadvantage that its backdrop support for the lattice boom is not
designed to prevent it from toppling over. Another disadvantage is
that the lattice boom is also shifted and held by hydraulic
cylinders, though the use of a traveling crane equipped with
lattice booms is accomplished as a rule over longer periods of time
and unavoidable oil leak losses make it impossible to hold a boom
for a longer period in a certain position. The varying angular
velocity and shifting movements of particularly long lattice booms
hardly permits fine adjustments in assembly operations. Another
disadvantage of this embodiment is that the great number of levers
and rods as well as the shifting cylinders for the boom greatly
limit the width of the cable drums for the load hoisting gears in a
traveling crane with a lattice boom, and so the cable-receiving
capacity of the cable drums and thus the load lifting heights are
very limited, particularly when long lattice booms and adjustable
long telescopic booms are employed. A particular disadvantage of
the known traveling crane construction with a telescopic boom is
that the load winch is arranged in front of the boom, and is thus
on the same side on which the load acts on the platform support, so
that the boom and its shifting mechanism are subjected to
additional loading forces by the cable line of the load winch.
SUMMARY OF THE INVENTION
In accordance with the present invention, the disadvantages of the
prior art constructions are overcome by a design of a hydraulic
traveling crane which includes a chassis for mounting a lattice
boom or telescopic boom. The mounting arrangement for either the
telescopic or the lattice boom is such, that either boom may be
used with the same possibilities of operation and the same safety
of operation as a hydraulic traveling crane equipped specifically
with only a lattice boom or with only a telescopic boom.
The inventive construction includes a rotatable mounting platform
carrying an upstanding support structure which includes an inclined
front wall providing a journal at its lower end for the lattice
boom or the whipping cylinder for the telescopic boom. The support
structure also carries a journal at its upper end which may be
provided for either the backdrop support for the lattice boom or
for the pivotal support of the telescopic boom. The whipping
cylinder for raising and adjusting the telescopic boom is
articulated to the lower pivotal support and to the associated
telescopic boom. The advantages of the construction is that no
special pivot or fulcrum support is required for the whipping
cylinders to support the telescopic boom and the telescopic boom is
not additionally loaded by the cable forces of the load winches,
but is relieved. The construction includes a rearward extension of
the support plates which provide a mounting for the rotatable
pulleys for drums of the cable winches. A rearward extension of
this part provides a means for mounting the guide pulleys for the
lattice boom. The cable winches and the necessary guide rollers for
operating the crane with a lattice boom are also carried on a
chassis by the forward location adjacent the support for the two
pivot journals. The lattice boom may be held safely in any position
by self-locking brakes installed on the cable winches. The
arrangement is such that very wide cable drums may be provided for
the cable winches, so that even long booms and, if necessary, with
extension booms, can be used on a mounting chassis. This is so,
because there are no constructional elements such as cylinders,
levers, etc., for actuating the boom which would limit the
necessary space. By arranging the two bearings on the support in
the spaced locations set forth, it is assured that no additional
bearing is required for articulating either one or the other of the
booms for the associated backdrop support or whipping cylinder.
The winches for the lattice boom are advantageously secured on an
upstanding bracket which is mounted on the chassis platform in a
manner such that it may be easily removed when the telescopic boom
is to be employed. These control winches can, of course, be left on
the platform if desired, when the telescopic boom is installed
instead of the lattice boom. A particularly space-saving
arrangement for the load hoisting gears, and which also enhances
the carrying capacity of the crane, is attained when they are
arranged at the ends of bearing plates secured as brackets on the
platform of the upper carrying chassis, or on adjoining winch
plates which are secured by means of welds, or securing screws. In
the latter case, they are carried on plates which project toward
the rear and in the case of a Diesel engine pump unit for the
hydraulic plant, they can be arranged underneath the projections of
the winch plates, and thus underneath the load hoisting gear where
they provide a counterweight for the operation of the device. The
hydraulic control and driving elements which are carried on the
crane are identical for use either with a telescopic boom, or with
a lattice type boom.
Instead of fastening the unit in a manner with the guard rollers on
the winch plates for ready detachment, a type of fastening may be
of advantage which permits the turning upwardly or downwardly of
the various elements. For traveling on the road, the boom is folded
as usual, and the unit turns automatically downwardly, so that the
height of the vehicle is reduced for transportation. The load
hoisting gears or the part thereof which may be provided for an
extension boom are mounted so that they may be easily removed and
can be replaced by a counterweight, in order to obtain the carrying
capacity of the traveling crane by use of this counterweight. In
addition, it is possible to arrange on the rear end of the platform
of the upper carrying chassis a fastening device for an additional
counterweight for the use of the traveling crane with a lattice
boom which is secured by means of welds, screws, etc. The unit for
the boom shifting winches and/or guide rollers are advantageously
carried on the bearing plates of the platform of the upper carrying
chassis.
Accordingly, it is an object of the invention, to provide a
traveling crane which includes means for operating with a
telescopic or lattice boom, and which comprises a mounting plate
carrying a first pivotal journal for suspending a lattice type boom
or a whipping cylinder for a telescopic boom, and a second pivotal
journal located upwardly from the first forming a pivotal mounting
for the telescopic boom or for a backdrop support of a lattice
boom, and which advantageously includes a rear mounting plate
portion carrying the hoisting drums or associated gearing.
A further object of the invention is to provide a hoisting crane
which is simple in design, rugged in construction, and economical
to manufacture.
The various features of novelty which characterize the invention
are pointed out with particularity in the claims annexed to and
forming a part of this disclosure. For a better understanding of
the invention, its operating advantages and specific objects
attained by its uses, reference should be had to the accompanying
drawing and descriptive matter in which there are illustrated
preferred embodiments of the invention.
BRIEF DESCRIPTION OF THE DRAWING
In the Drawing:
FIG. 1 is a schematic side elevational view of a chassis of a
hydraulic traveling crane having a lattice boom installed thereon
and constructed in accordance with the invention;
FIG. 2 is a view similar to FIG. 1, but with a telescopic boom
thereon; and
FIG. 3 is an enlarged view of a portion of the mounting chassis for
the crane of another embodiment of the invention.
GENERAL DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to the drawings in particular, the invention provides, a
hydraulic traveling crane, generally designated 50, which includes
a chassis with a platform 1 at the upper portion, which is
rotatable on a mounting base 52. The platform 1 carries a large
gear 54 which is driven by a pinion 56 for rotational purposes.
In accordance with the invention, the platform 1 carries two spaced
parallel upright mounting plates or bearing plates 6 which includes
an oblique front edge 6a. A boom step bearing or mounting pin 2 is
carried at the lower end of the front of each plate 6 and provides
a pivotal mounting for either a lattice boom, generally designated
3, in FIG. 1, or a so-called whipping cylinder or fluid drive motor
10 for raising and lowering a telescopic boom 30.
A higher pivot or abutment bolt 5 is supported by the plate 6 at a
higher elevation and rearwardly of the pivot 2 and, it provides a
pivotal support for either a backdrop support 4, as shown in FIG.
1, or for the telescopic boom 30, as shown in FIG. 2.
The bearing plate 6 includes a rearwardly extending upper portion
which carries winch plates 7 which project rearwardly over a Diesel
engine pump unit 17 for the hydraulic plant which is mounted on the
platform 1. The load hoisting gears or drums 8 and 9 are journalled
in the winch plates 7, 7 and form a winch unit, generally
designated 24, which is secured to the bearing plate 6. The load
hoisting gear 9 is provided for an extension boom which is not
shown, but which can be used either with the lattice boom 3 or the
telescopic boom 30.
As shown in FIG. 1, the lattice boom 3 carries guide pulleys 3a and
3b at the outer end and a hook 58 is suspended on cable 60 which
extends back to the load hoisting gear 8. The backdrop support 4
includes an adjustable threaded extension 4a which is pivotally
connected to a pivot pin 62 carried on the lattice boom 3. The
lattice boom 3 also includes a diagonal brace 64 which is pivoted
at a pivot pin 66 to the lattice boom 3 and which carries a pulley
68 at its outer end.
An adjusting winch 12 is connected to cable line 22 for adjusting
the lattice boom 3 and an auxiliary winch 13 is connected with
cable line 23 for adjusting an extension boom which is not shown.
Coaxial hydraulic motors (not shown) are arranged adjacent to
winches 12 and 13 and they are combined in a conpact unit,
generally designated 14, which is detachably secured to the
platform 1 by means of screws 15. The unit 14 can be easily removed
for equipping the traveling crane with a telescopic boom, as shown
in FIG. 2. The Diesel pump unit 17 for the hydraulic plant is
arranged underneath the projecting winch plates 7 and thus has a
favorable counterweight effect.
On the rear end of the platform 1 there is arranged a fastening
device 26 with an attached counterweight 27. Guide rollers 16 for
holding the lattice boom 3 are combined in a unit which includes
side extension plates 72 which are secured to the bearing plate 6
by bolts 25.
An alternate arrangement of the mounting for the guide rollers 16
comprises a unit 18 which is of triangular plate-shaped
configuration and which carries the guide roller set, and is
pivotally mounted on a pivot 19 carried on an extension plate 72a.
The plate 18 may be shifted outwardly and inwardly in respect to
the extension 72a by pivoting it around the pivot 19 under the
movement of a stop bolt 20 which may be adjustably threaded into a
member 74 carried on the extension 72a.
When the traveling crane 50 is to be employed with a telescopic
boom 30, as shown in FIG. 2, the whipping cylinder 10, which is
pivoted at the pivot bolt 2, at one end is connected by an
extensible piston rod 76 to a pivot bolt 11 on the telescopic boom
30. In the showing of FIG. 2, the unit 14 is shown as being
removed, and the part supporting the counterweight 27 is not
shown.
While specific embodiments of the invention have been shown and
described in detail to illustrate the application of the principles
of the invention, it will be understood that the invention may be
embodied otherwise without departing from such principles.
* * * * *