A mobile lift crane includes a carbody made from two side members and two end cross members connected to each other with a carbody connection that can be disconnected such that the side members and end cross members can be individually transported between job sites and reassembled at a new job site.
A mobile lift crane includes a carbody made from two side members and two end cross members connected to each other with a carbody connection that can be disconnected such that the side members and end cross members can be individually transported between job sites and reassembled at a new job site. Preferably the two side members are interchangeable with each other when making the carbody, and the two end cross members are also interchangeable with each other. Further, each of the side members and end cross members preferably has a section of a roller path and section of a ring gear attached to them while being transported and assembled.
대표청구항▼
1. A lift crane comprising: a) a carbody made from two side members and two end cross members such that each side member is connected to each end cross member with a carbody connection that comprises at least two pins and that can be disconnected such that the side members and end cross members can
1. A lift crane comprising: a) a carbody made from two side members and two end cross members such that each side member is connected to each end cross member with a carbody connection that comprises at least two pins and that can be disconnected such that the side members and end cross members can be individually transported between job sites and reassembled at a new job site;b) ground engaging members elevating the carbody off the ground;c) a rotating bed rotatably connected to the carbody such that the rotating bed can swing with respect to the ground engaging members; andd) a boom pivotally mounted on the rotating bed. 2. The lift crane of claim 1 wherein the carbody connection comprises at least one first vertical flange having a base connected to either the side member or the end cross member and a protruding front surface, and at least two second vertical flanges spaced apart by a distance greater than the thickness of the first vertical flange and each having a base connected to the other of the side member or the cross member and a protruding front surface, each of the first and second vertical flanges having two horizontal holes through the flanges sized and spaced so that when the first vertical flange is placed between the second vertical flanges, the holes allow the two pins to be placed through the flanges, connecting the side member to the end cross member. 3. The lift crane of claim 2 further comprising a hydraulic cylinder mounted between the end cross member and the side member that can be activated to pull the members into position for insertion of the two pins. 4. The lift crane of claim 2 wherein the carbody connection on the end cross member comprises two vertical first flanges and the carbody connection on the side member comprises four vertical second flanges, and the carbody connection is made by inserting four pins. 5. The lift crane of claim 4 further comprising hydraulic pin pushers mounted on the side member adjacent each of the four pins. 6. The lift crane of claim 2 wherein either the first or second flanges include a notch formed in the protruding front surface of the flange at an elevation between the elevations of the two holes, and the other of the first and second flanges include a pin captured in the protruding front surface at an elevation between the elevations of the two holes, the depth of the notch, the position of the pin and the respective elevations of the pin and notch cooperating so that when the carbody members are brought together with the pin in the notch, the holes in the flanges can be aligned. 7. The lift crane of claim 6 wherein the notch is provided in the first vertical flange and the captured pin spans between the two second vertical flanges. 8. The lift crane of claim 1 wherein the ground engaging members comprises crawlers and the crane is a mobile lift crane. 9. The mobile lift crane of claim 8 wherein the crawlers comprise at least four crawlers, each crawler having a crawler frame attached to the carbody by a trunnion having an axis, the crawler frame being attached to the carbody so as to be able to pivot with respect to the carbody about the axis of the trunnion. 10. The mobile lift crane of claim 9 wherein each trunnion is connected to a carbody end cross member. 11. The lift crane of claim 1 wherein the carbody comprises a roller path and ring gear, and the roller path and ring gear is comprised of four segments, each segment integrated with one of the carbody members. 12. The lift crane of claim 1 wherein the two side members are interchangeable with one another. 13. The lift crane of claim 1 wherein the two cross members are interchangeable with one another. 14. The lift crane of claim 1 wherein the carbody further comprises a central cross member that may also be disassembled from the side members and end cross members, the central cross member including a king pin on which the rotating bed is pivotally mounted. 15. A lift crane comprising: a) a carbody made from a plurality of members, with each member connected to another member with a carbody connection that can be easily disconnected such that the members can be individually transported between job sites and reassembled at a new job site, at least two of the members each having a section of a roller path and a section of a ring gear attached to the carbody member;b) ground engaging members elevating the carbody off the ground;c) a rotating bed rotatably connected to the carbody, including rollers positioned on the roller path supporting the rotating bed on the carbody and at least one drive gear engaging teeth on the ring gear, such that the rotating bed can swing with respect to the ground engaging members; andd) a boom pivotally mounted on the rotating bed. 16. The lift crane of claim 15 wherein the carbody is made from at least four members that each have a section of a roller path and section of a ring gear attached thereto. 17. The lift crane of claim 15 wherein the carbody connection comprises one or more pins. 18. The lift crane of claim 15 wherein the sections of roller path on each of the at least two carbody members match up to form an uninterrupted roller path at the joints between carbody members and the sections of ring gear on each of the at least two carbody members match up to form an uninterrupted ring gear at the joints between carbody members. 19. The lift crane of claim 15 wherein the sections of the roller path that are attached to the carbody members make up the entire roller path of the crane, and the sections of ring gear that are attached to the carbody members make up the entire ring gear of the crane. 20. A method of assembling a lift crane having, during operation, i) a carbody, ii) ground engaging members elevating the carbody off the ground, iii) a rotating bed rotatably connected to the carbody such that the rotating bed can swing with respect to the ground engaging member, and iv) a boom pivotally mounted on the rotating bed, with a load hoist line extending there from; the method comprising: a) providing first and second side members that are interchangeable with each other when making the carbody, and providing first and second end cross members that are interchangeable with each other when making the carbody, wherein each side member is connectable to each end cross member with a carbody connection that can be disconnected such that the side members and end cross members can be individually transported between job sites and reassembled at a new job site;b) orienting the first side member and the first end cross member so that they are spaced apart longitudinally but are at the same relative vertical position with respect to one another that they will be once connected to form the carbody;c) moving the first side member and first end cross member only horizontally into a connected position;d) securing the first side member to the first end cross member; ande) connecting the second side member and second end cross member to the combined first side member and first end cross member. 21. The method of claim 20 further comprising the step of connecting a central cross member, including a king pin on which the rotating bed is pivotally mounted, to the connected first and second side members and first and second end cross members. 22. The method of claim 20 wherein the step of securing the first side member to the first end cross member further comprises connecting a diagonal brace between midpoints of the first side member and the first end cross member. 23. The method of claim 20 wherein the step of connecting the second side member and second end cross member to the combined first side member and first end cross member comprises placing the second side member and combined first side member and first end cross member so that they are spaced apart longitudinally but are at the same relative vertical position with respect to one another that they will be once connected to form the carbody, and moving the second side member only horizontally into a connected position. 24. The method of claim 23 wherein the step of connecting the second side member and second end cross member to the combined first side member and first end cross member further comprises placing the second end cross member and combined first side member, second side member and first end cross member so that they are spaced apart longitudinally but are at the same relative vertical position with respect to one another that they will be once connected to form the carbody, and moving the second end cross member only horizontally into a connected position. 25. The method of claim 20 wherein a hydraulic cylinder mounted between the first end cross member and the first side member is activated to pull the members into an operational position. 26. The method of claim 20 wherein two pins are inserted through holes in carbody connection structures of the first side member and the first end cross member that are aligned in the operational position, to secure the first side member to the first end cross member. 27. A lift crane comprising: a) a carbody made from two side members and two end cross members such that each side member is connected to each end cross member with a carbody connection that can be disconnected such that the side members and end cross members can be individually transported between job sites and reassembled at a new job site;b) ground engaging members elevating the carbody off the ground;c) a rotating bed rotatably connected to the carbody such that the rotating bed can swing with respect to the ground engaging members; andd) a boom pivotally mounted on the rotating bed;e) wherein the carbody connection comprises at least one first vertical flange having a base connected to either the side member or the end cross member and a protruding front surface, and at least two second vertical flanges spaced apart by a distance greater than the thickness of the first vertical flange and each having a base connected to the other of the side member or the cross member and a protruding front surface, each of the first and second vertical flanges having at least one horizontal hole through the flanges sized and spaced so that when the first vertical flange is placed between the second vertical flanges the hole allows a pin to be placed through the flanges, connecting the side member to the end cross member; and wherein either the first or second flanges include a notch formed in the protruding front surface of the flange at an elevation, and the other of the first and second flanges include a pin captured in the protruding front surface at an elevation, the depth of the notch, the position of the pin and the respective elevations of the pin and notch cooperating so that when the carbody members are brought together with the pin in the notch, the holes in the flanges can be aligned.
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