Title of Invention

CRANE, IN PARTICULAR MOBILE CRANE WITH A NARROW TRACK AND ENLARGED SUPPORTING BASE

Abstract Crane, in particular mobile crane with a narrow track and enlarged supporting base. Cranes with a moving gear with rubber tyres are generally equipped with stays. Loads can generally be lifted only when the crane stands on the stays. The forces are not generally uniformed distributed among the stays in operation, creating a torsional moment in the central part and also in the tracks. The invention addresses the problem of providing a crane, in particular a mobile crane on a narrow tracked moving gear, with stays arranged in such a way that an enlarged supporting base is achieved. The present crane comprises a truck, a superstructure and a jib arranged thereon, the superstructure being joined to the truck by a revolving connection and multiple stays being provided on the crane in order to increase the supporting base. The orientation of the stays is fixed in such a way that they form an angle of 90° with each other, two stays being oriented in the longitudinal direction of the truck and two transversely thereto. This arrangement creates a direct power flow, and no avoidable moments arise.
Full Text

CRANE, IN PARTICULAR MOBILE CRANE WITH A NARROW TRACK
AND ENLARGED SUPPORTING BASE
The invention pertains to a crane according to the introductory clauses of Claims 1 and 10.
As a rule, cranes with rubber-tired travel carriages are equipped with outriggers (see Figure 9). The lifting of loads is usually possible only when the crane is standing on the outriggers. Cranes with a crawler-type carriage usually do not have outriggers but rather lift loads while standing on the crawlers and can also usually travel while carrying the load. To obtain a wider support base, crawler-mounted cranes can also be equipped with outriggers. Figure 10 shows the undercarriage of the Demag CC/PC 3800. The most important components are illustrated schematically in Figure 11. The arrow 1 indicates the direction of traveL Four arms 4 extend from the center of rotation 2 to the crawlers 3. Four outriggers 5 are attached on the outside of the crawlers. A crane of this type can be operated either while standing on the crawlers or while standing on the outriggers. During operation on the outriggers, this arrangement is characterized by a direct flow of force, which is desirable. Nevertheless, the forces and moments must be transmitted through the crawlers 11. At the ends of the crawlers there are idler wheels, gearboxes, and crawler take-up devices. As a result, it is difficult to transmit the forces through at these points. Figure 12 shows an undercarriage similar to that of Figure 11, Here the crawlers are connected to each other by a middle section 6. This middle section represents the conventional design for a crawler-

mounted crane without outriggers. There is usually sufficient room in the center of the crawler frame to make it relatively easy to install the components and to bolt them together. During operation on the outriggers, however, the forces are usually not distributed uniformly in the outriggers. As a result, torque is created in the middle section 6 and also in the crawlers 3. In Figure 13, not only the middle section 6 but also the outriggers 7 are attached to the centers of the crawlers. This relieves the crawlers 3 of load.
The invention is based on the task of equipping a crane, especially a mobile crane on a narrow crawler-type carriage, with outriggers in such a way that an extended support base is obtained.
This task is accomplished according to Claim 1 by a crane, especially a mobile crane, consisting of an undercarriage and a superstructure, on which a boom is mounted, where the superstructure is connected to the undercarriage by a rotary joint, and where several outriggers are provided on the crane to increase the size of the support base, characterized in that the undercarriage consists of a middle section and two parallel crawler-type carriages, one on each side of the middle section; and in that four outriggers are provided, which are connected to the undercarriage, where their orientation is fixed in such a way that each one forms a 90° angle to the other, and where two of the outriggers are oriented in the longitudinal direction of the undercarriage and two are oriented transversely to it.
As a result of the arrangement of the outriggers in the longitudinal direction and in the direction transverse to the undercarriage, a direct flow of force is obtained. As a result, there are no avoidable torques. The forces and stresses which occur are smaller. Less paderial is required. Weight and costs are reduced. In addition, the points at which the outriggers are

connected to the travel carriage are always at right angles. Outriggers can usually be attached more easily and more quickly at a right angle than at a slant. The amount of space occupied by the connection is also smaller.
The outriggers are preferably arranged parallel to the crawlers and perpendicular to the crawlers, and they intersect at the center of rotation. The concrete design can deviate from this. The point is, however, that the ends of the outriggers which are transverse to the travel direction lie outside the track and that the outriggers which are oriented in the travel direction are located inside the track.
According to one embodiment, the outriggers can be attached to the undercarriage in that at least one of the transversely oriented outriggers is attached directly to a crawler-type carriage.
It is also possible for the bottom surface of one of the lateral outriggers to be attached to the facing side of the crawler-type carriage and for the top surface to be attached to the middle section.
The longitudinally oriented outriggers can be attached directly to the middle section or to the side of the crawler-type carriage facing the middle section or to both the middle section and the crawler-type carriage.
According to another embodiment, the outriggers can be designed to telescope and to have the capacity to be folded up or to the side.
Extendable outrigger cylinders, which establish contact with the support surface, are mounted at the ends of the outriggers.
A special embodiment which is advantageous both for stationary and for mobile cranes

consists in that at least one of the outriggers is designed as a tipping edge standing on two points .
To accomplish this, a transverse beam can be attached to the end of the outrigger, and two outrigger cylinders can be mounted on the transverse beam a certain distance apart.
The outrigger cylinders can be extended either hydraulically or by means of spindle drives.
Finally, an additional outrigger cylinder can be mounted on the end of the outrigger in the center between the two outrigger cylinders mounted on the transverse beam.
The outrigger cylinders, according to another embodiment, can be connected at their free ends to an outrigger pad by way of ball joints, and it is possible for one of the outrigger cylinders mounted on the transverse beam to be supported on the beam with freedom to rotate around its longitudinal axis to exclude any possible straining forces.
The invention is explained in greater detail below on the basis of the drawings:
— Figure 1 shows a top view of the crawler-type carriage with outriggers.
~ Figure 2 shows a view from the rear.
- Figure 3 shows a modified design of the outriggers with tipping edge.
-­ Figures 4 and 5 explain the tipping edge.
-­ Figures 6-8 show designs of an outrigger; and
-­ Figures 9-13 show diagrams of the prior art.
According to the invention (Figure 1), the crane has 4 outriggers. Looking in the travel direction, one outrigger 8 points forward and lies inside the track. One outrigger 9 points to the rear and lies inside the track. One outrigger 10 points to the left and lies outside the track.

One outrigger 11 points to the right and lies outside the track. In this arrangement, all the outriggers are subjected purely to bending. The middle section 14 and the crawlers 11 are not subject to torsion either. The outriggers 17-20 are connected to the crawlers 11 and to the middle section 14 at right angles in areas where there is plenty of room to work.
Figure 2 shows an inventive crane from the rear. The superstructure 12 with the boom 13 and the counterweight 14 is connected rotatably to the middle section 6 by a rotary joint 15. With this arrangement, as can be seen in Figure 2, the outriggers can be relatively long, as a result of which strong moments develop in the outriggers. Because the left outrigger 10 passes through the crawler 3, the height of the outrigger 10 is limited by the height of the crawler.
The way in which the right outrigger 11 is attached eliminates this restriction. The bottom surface of the outrigger 11 is connected to the right crawler. The top surface is fastened to the middle section 6. It is also possible for the outrigger to be attached only to the middle section 3. In this case, there no need for any modifications to the crawler. If the outriggers 10, 11 are connected to the middle section, this connection must be located between the rotary joint and the connections to the crawlers. The rear outrigger 9 is attached only to the middle section. To reduce the moment in the outrigger, it, like the forward outrigger 8, can be attached both to the middle piece and to the crawlers. Of course, it is also possible to attach the outriggers 8, 9 only to the crawlers.
Figure 3 shows another advantageous embodiment. One outrigger 16 is designed so that a tipping edge is formed on the outrigger. The advantage will be explained on the basis of Figures 4 and 5. In Figure 4, 4 outriggers 17 are illustrated schematically, which are arranged on a circle centered on the center of rotation 2. The connecting line 18 between the ends of

two adjacent outriggers is referred to as the "tipping edge" 18. If the crane were to lose its stability (accident), it would tip over this edge 18. If an outrigger 16 (Figures 4 and 5) is designed so that it stands on 2 points, a tipping edge 19 is formed, which is farther away from the center of rotation than the conventional tipping edges 18. When the boom is standing over this outrigger, therefore, the load moment is higher. This higher load moment can be used to carry out especially heavy lifts or to raise especially long booms from the ground.
Other possible embodiments of these types of outriggers will be explained on the basis of Figures 6, 7, and 8. Figure 8 shows a typical conventional outrigger. A hydraulic cylinder 21, which is connected to an outrigger plate 23 by means of a ball joint 22, is attached to the end of the outrigger support beam 20. The ball joint compensates for small irregularities in the surface of the ground. An inventive outrigger must have a tipping edge at its end. One possible design (Figure 7) consists of an outrigger with an outrigger cylinder 21 and two additional outrigger cylinders 24, which are mounted laterally on a transverse beam 25 attached to the end of the outrigger support beam 20. During normal operation of the crane, the middle outrigger cylinder 21 will be used. To activate the additional support edge, the lateral supports 24 are extended. This can be done hydraulically or by means of spindle drives. Fold-away or plug-in outriggers are also possible. Figure 8 shows another embodiment. In the forward area, two outrigger cylinders 26, 27 are mounted on a transverse beam 29. They are connected to an outrigger pad 28 by ball joints. To exclude the possibility of straining forces, one of the cylinders 27 is mounted rotatably in the transverse beam 29. When the additional tipping edge is activated, hydraulic oil is trapped in the cylinders. The arrangement is then rigid. During normal operation of the crane (on the standard support

base), the cylinders are connected hydraulically in series, so that oil can flow unhindered from one cylinder to the other. Thus the outrigger pad can rotate around a point between the cylinders. This possibility of being able to switch between normal operation and operation with an extended tipping edge is not absolutely necessary. Nevertheless, it ensures that the pressure under the outrigger pad (28) is distributed uniformly over the ground.











CLAIMS
1. Crane, especially a mobile crane, consisting of an undercarriage and a superstructure, on which a boom is mounted, where the superstructure is connected to the undercarriage by a rotary joint, and where several outriggers are provided on the crane to increase the size of the support base, characterized in that the undercarriage consists of a middle section and two parallel crawler-type carriages, one on each side of the middle section; in that four outriggers are provided, which are connected to the undercarriage, where their orientation is fixed in such a way that two of the outriggers are oriented in the longitudinal direction inside the track of the undercarriage and two are oriented transversely outside the track of the undercarriage,
2. Crane according to one of the preceding claims, characterized in that, of the transversely oriented outriggers, at least one is attached directly to a crawler.
3. Crane according to one of the preceding claims, characterized in that at least one of the lateral outriggers is connected by its bottom surface to the facing side of the crawler-type carriage, whereas its top surface is attached to the middle section.
4. Crane according to one of the preceding claims, characterized in that, of the outriggers oriented in the longitudinal direction of the undercarriage, at least one is attached to

the middle section*
5 Crane according to one of the preceding claims, characterized in that, of the outriggers oriented in the longitudinal direction of the undercarriage, at least one is attached both to the middle section and to the crawler-type carriages.
6. Crane according to one of the preceding claims, characterized in that, of the outriggers oriented in the longitudinal direction of the undercarriage, at least one is attached to the sides of the crawler-type carriages facing the middle section.
7. Crane according to one of the preceding claims, characterized in that the outriggers are telescoping.
8. Crane according to one of the preceding claims, characterized in that the outriggers can be folded upward or to the side.
9. Crane according to one of the preceding claims, characterized in that extendable outrigger cylinders are mounted at the ends of the outriggers to make contact with the support surface.

10. Crane consisting of an undercarriage and a superstructure, on which a boom is mounted, where the superstructure is connected to the undercarriage by a rotary joint, and where several outrigger are provided on the crane, characterized in that at least four outrigger arms are provided, which are arranged on a circle centered as accurately as possible on the center of rotation, where at least one of the outriggers is designed in such a way that it is supported on at least two points, the connecting line between these two points thus forming a tipping edge.
11. Crane according to Claim 10, characterized in that a transverse beam is attached to

the end of the outrigger and that two outrigger cylinders are provided on the transverse beam a certain distance apart.
12. Crane according to Claim 11, characterized in that the outrigger cylinders can be
extended hydraulically.
13. Crane according to Claim 11, characterized in that the outrigger cylinders can be
extended by spindle drives.
14. Crane according to one of Claims 11-13, characterized in that an additional
outrigger cylinder is mounted on the end of the outrigger in the middle between the two
outrigger cylinders mounted on the transverse beam.
15. Crane according to one of Claims 11-14, characterized in that the outrigger
cylinders are connected at their free ends to an outrigger pad by way of ball joints.
16. Crane according to one of Claims 11-15, characterized in that an outrigger
cylinder is mounted on the transverse beam with freedom to rotate around its longitudinal axis.


Documents:

1518-CHENP-2008 FORM-13 18-04-2013.pdf

1518-CHENP-2008 CORRESPONDENCE OTHERS 03-04-2014.pdf

1518-CHENP-2008 AMENDED CLAIMS 18-04-2013.pdf

1518-CHENP-2008 AMENDED PAGES OF SPECIFICATION 18-04-2013.pdf

1518-CHENP-2008 CORRESPONDENCE OTHERS 05-12-2012.pdf

1518-CHENP-2008 EXAMINIATION REPORT REPLY RECEIVED 18-04-2013.pdf

1518-CHENP-2008 FORM-1 18-04-2013.pdf

1518-CHENP-2008 FORM-13-1 18-04-2013.pdf

1518-CHENP-2008 FORM-3 18-04-2013.pdf

1518-CHENP-2008 OTHER PATENT DOCUMENT 18-04-2013.pdf

1518-CHENP-2008 OTHERS 18-04-2013.pdf

1518-CHENP-2008 POWER OF ATTORNEY 18-04-2013.pdf

1518-CHENP-2008 CORRESPONDENCE OTHERS 02-09-2014.pdf

1518-CHENP-2008 CORRESPONDENCE OTHERS 19-08-2014.pdf

1518-CHENP-2008 FORM-1 02-09-2014.pdf

1518-CHENP-2008 - Petiton 137 - POR.pdf

1518-chenp-2008-abstract.pdf

1518-chenp-2008-claims.pdf

1518-chenp-2008-correspondnece-others.pdf

1518-chenp-2008-description(complete).pdf

1518-chenp-2008-drawings.pdf

1518-chenp-2008-form 1.pdf

1518-chenp-2008-form 3.pdf

1518-chenp-2008-form 5.pdf

1518-chenp-2008-pct.pdf


Patent Number 263051
Indian Patent Application Number 1518/CHENP/2008
PG Journal Number 41/2014
Publication Date 10-Oct-2014
Grant Date 30-Sep-2014
Date of Filing 27-Mar-2008
Name of Patentee TEREX CRANES GERMANY GMBH
Applicant Address DINGLERSTRASSE 24 66482 ZWEIBRUCKEN
Inventors:
# Inventor's Name Inventor's Address
1 KARP, GUNTER AM FELD 22A 66919 HERSCHBERG
2 KOSTER, FRITZ-BOTHO WALDSTRASSE 15 67806 ROCKENHAUSEN
3 ZOLLONDZ, RUDIGER TALSTRASSE 3 66500 HORNBACH
4 WECKBECKER, ALFONS RIEDINGERSTRASSE 2 66482 ZWEIBRUCKEN
PCT International Classification Number B66C 23/80
PCT International Application Number PCT/DE06/01479
PCT International Filing date 2006-08-22
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 102005047745.3 2005-09-28 Germany