EP0126302A2 - Centering arrangement for redecking of upper crane - Google Patents
Centering arrangement for redecking of upper crane Download PDFInfo
- Publication number
- EP0126302A2 EP0126302A2 EP84104404A EP84104404A EP0126302A2 EP 0126302 A2 EP0126302 A2 EP 0126302A2 EP 84104404 A EP84104404 A EP 84104404A EP 84104404 A EP84104404 A EP 84104404A EP 0126302 A2 EP0126302 A2 EP 0126302A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- pins
- carrier
- centering
- pin
- crane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- B66C23/72—Counterweights or supports for balancing lifting couples
- B66C23/78—Supports, e.g. outriggers, for mobile cranes
- B66C23/80—Supports, e.g. outriggers, for mobile cranes hydraulically actuated
-
- 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
Definitions
- This invention relates to an arrangement for centering the upper relative to the lower or carrier of separable cranes.
- a crane indicated generally at 10, includes an upper 12 which is rotatably mounted on a lower or carrier 14 by means of a turntable bearing 16.
- the turntable bearing is releaseably secured to a ring 18 secured to the upper with a locking ring expandable to interlock the bearing 16 and ring 18, and retractable to release the bearing from the ring to permit separation of the upper 12.
- a preferred means for such releaseable attachment of ring and bearing is more fully shown and described in U. S. Patent 3,923,407 issued Dec. 2, 1975 to L. B. Jensen and R. E. Thune.
- the ring must be aligned with the turntable bearing and the swing pinion must also be positioned for engagement with a ring gear on the outer race of the turntable bearing to permit swinging of the upper.
- the problem encountered with redecking of the upper on the carrier is alignment of these components within a relative close tolerance.
- the upper 12 carries a plurablity of legs 20, preferrably one at each of its corners, with a double-acting hydraulic.jack 22 affixed to, or otherwise incorporated into the free end of each leg 20. With the ring 18 and bearing 16 released, extension of these jacks will elevate the upper 12 above the carrier 14, as shown in Figure 1. Retraction of these jacks will lower the upper 12 onto the carrier 14.
- a pontoon or float 24 is pinned to the rod end of each jack 22 to distribute the load over a relatively large area and thereby achieve acceptable ground pressures. Alignment or centering of the aforementioned components is provided by four pins 26 carried on the upper 12, two at each end thereof, and corresponding sockets 28 affixed to the carrier 14. Since all of the pins 26 and their cooperating elements are similar, a description of one will be sufficient for a complete understanding.
- the centering pin 26 is slidably mounted in a tubular member or sleeve affixed to the upper 12.
- the pin 26 is itself preferrably a tubular member for weight reduction and has a hardened frustroconical cap 32 affixed to its lower end.
- a handle 34 is secured to the upper end of the pin 26. This handle is preferrably rigid with a transverse dimension greater than the interior diameter of the sleeve 30 to preclude the pin 26 from dropping through the sleeve.
- a crossbore 36 is provided in the pin 26 and a similar crossbore 38 is provided in the sleeve 30.
- a retaining pin 40 is capable of insertion through these crossbores.
- the centering pin 26 is retained in an operative or stowed position by manually raising the pin 26, by means of handle 34, and inserting pin 40 through the crossbore 38 so that the cap 32 rests on the pin 40, as shown in Figure 3.
- the pin 26 is retained in an operative or centering position by lowering it until the crossbores 36 and 38 are aligned and the retaining pin 40 inserted, as shown in Figure 4.
- the angle of the conical surface 44 and the cap 32. is chosen so that the tangent of this angle is approximately equal to the coefficient of friction between the materials thereof when lubricated. Such an angle assures effective centering without imposing large side loads on the structures.
- the upper and carrier are operatively assembled with the upper facing the rear of the carrier and aligned therewith in a fore and aft direction.
- the centering pin 26 is permitted to drop into contact with the unattached socket 42.
- the position of the socket is then adjusted so that the centerlines of the pin and socket are aligned and the socket 42 is then secured to the carrier 14.
- the centering sequence for redecking is illustrated in Figures 4-6.
- the centering pin 26 With the upper elevated from the carrier, as shown in Figure 1, the centering pin 26 is retained by pin 40 in its lowered or operative position.
- the carrier 14 is manuevered sufficiently to position the pin 26 so that at least a portion of the angled surface of the cap 32 is directly above the complementary surface 44.
- the centerline 46 of the pin 26 will most likely be offset from the centerline 48 of the socket 42, as indicated at 50 in Figure 4.
- the jacks 22 are then slowly contracted, lowering the upper 12 and causing the pin 26 to contact the socket 42, as shown in Figure 5. A further contraction of these jacks will cause the pin 26 to be urged by the socket 42 toward the center thereof.
- the upper 12 will, therefore, be displaced or moved in a horizontal direction, as indicated by the arrow 52 in Figure 6, relative to the stationary carrier 14.
- the pin and socket will now be aligned and will result, because there are four of these pins and sockets, in the upper 12 being aligned, within acceptable tolerances, to permit rejoining of the upper and carrier.
- the jacks 22 are then extended just enough to permit removal of retaining pin 40 from the bores 36 and 38.
- the jacks 22 are then retracted fully to redeck the upper on the carrier.
- the centering pin 26 is then manually raised by the handle 34 to permit the retaining pin 40 to be inserted through bore 38 below the cap 32 to retain the pin 26 in its stowed position. Swinging movement of the upper on the carrier is then possible.
- the floats 24, as shown in Figure 7, are provided with a base 54 to which a bearing block 56 is secured.
- An upper bearing plate 58 rests upon and is movable relative to the block 56. Both of these bearing members have smooth mating surfaces and are lubricated to provide as small a friction force to movement under load as possible.
- a fabricated socket 60 is attached to the plate 58 and facilitates attachment to the rod end of the jack 22 by means of a removable pin 62.
- a retaining flange is attached to the periphery of the plate 58 and limits lateral movement of the plate 58 relative to the block 56.
- the float 24 is initially positioned as shown in Figure 7 with the block 56 centered on the plate 58. This relationship is established by aligning the edges of a plate 66, on which the block 56 is centered and attached, forming a part of the fabricated base 54 with a flange 64 attached to plate 58. During the centering sequence illustrated in Figure 6, the leg 20 and jack 22 will also be displaced or moved laterally. The bearing plate 58 and its attached members will be able to move laterally as shown in Figure 8, to accommodate the movement of the upper 12. As shown in Figure 9, the movement of the plate 58 is universal in a horizontal plane and within the limits determined by contact between the flange 64 and the block 56. Handles 70 and 72 secured to the plate 58 and the base 54 respectively facilitate transport and positioning thereof.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
- Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
Description
- This invention relates to an arrangement for centering the upper relative to the lower or carrier of separable cranes.
- In the drawings:
- Figure 1 is a side elevational view of a crane, shown with the upper undecked, incorporating the present invention;
- Figure 2 is a top plan view of the crane in Figure 1 with portions thereof broken away and eliminated;
- Figure 3 is vertical section taken on line 3-3 of Figure 2 showing one of the center pins and its mating socket with the pin retracted;
- Figure 4 is a view of the pin in Figure 3 with the pin extended;
- Figure 5 is a view of the pin in Figure 4 but with the upper having been lowered to bring the pin into contact with the socket;
- Figure 6 is a view similar to Figure 5 but showing the pin being laterally displaced as the upper is lowered further;
- Figure 7 is a cross-sectional view of the float taken on line 7-7 of Figure 1;
- Figure 8 is a view of the float in Figure 7 showing the lateral shifting therein during centering; and
- Figure 9 is a cross-sectional view taken on line 9-9 of Figure 7.
- Referring to Figure 1 and 2, a crane, indicated generally at 10, includes an upper 12 which is rotatably mounted on a lower or
carrier 14 by means of a turntable bearing 16. The turntable bearing is releaseably secured to aring 18 secured to the upper with a locking ring expandable to interlock thebearing 16 andring 18, and retractable to release the bearing from the ring to permit separation of the upper 12. A preferred means for such releaseable attachment of ring and bearing is more fully shown and described in U. S. Patent 3,923,407 issued Dec. 2, 1975 to L. B. Jensen and R. E. Thune. As will be seen therein, the ring must be aligned with the turntable bearing and the swing pinion must also be positioned for engagement with a ring gear on the outer race of the turntable bearing to permit swinging of the upper. The problem encountered with redecking of the upper on the carrier is alignment of these components within a relative close tolerance. - The upper 12 carries a plurablity of
legs 20, preferrably one at each of its corners, with a double-actinghydraulic.jack 22 affixed to, or otherwise incorporated into the free end of eachleg 20. With thering 18 and bearing 16 released, extension of these jacks will elevate the upper 12 above thecarrier 14, as shown in Figure 1. Retraction of these jacks will lower the upper 12 onto thecarrier 14. A pontoon orfloat 24 is pinned to the rod end of eachjack 22 to distribute the load over a relatively large area and thereby achieve acceptable ground pressures. Alignment or centering of the aforementioned components is provided by fourpins 26 carried on the upper 12, two at each end thereof, andcorresponding sockets 28 affixed to thecarrier 14. Since all of thepins 26 and their cooperating elements are similar, a description of one will be sufficient for a complete understanding. - Referring now to Figures 3-6, the centering
pin 26 is slidably mounted in a tubular member or sleeve affixed to the upper 12. Thepin 26 is itself preferrably a tubular member for weight reduction and has a hardenedfrustroconical cap 32 affixed to its lower end. Ahandle 34 is secured to the upper end of thepin 26. This handle is preferrably rigid with a transverse dimension greater than the interior diameter of thesleeve 30 to preclude thepin 26 from dropping through the sleeve. Acrossbore 36 is provided in thepin 26 and asimilar crossbore 38 is provided in thesleeve 30. Aretaining pin 40 is capable of insertion through these crossbores. The centeringpin 26 is retained in an operative or stowed position by manually raising thepin 26, by means ofhandle 34, and insertingpin 40 through thecrossbore 38 so that thecap 32 rests on thepin 40, as shown in Figure 3. Thepin 26 is retained in an operative or centering position by lowering it until thecrossbores retaining pin 40 inserted, as shown in Figure 4. - A
socket 42 having aconcave surface 44, which is complementary to the conical surface ofcap 32 and is circular in plan view preferrable with a diameter approximately twice that of thepin 26, is secured to thecarrier 14. The angle of theconical surface 44 and the cap 32.is chosen so that the tangent of this angle is approximately equal to the coefficient of friction between the materials thereof when lubricated. Such an angle assures effective centering without imposing large side loads on the structures. - To initially position the
socket 42 on thecarrier 14, the upper and carrier are operatively assembled with the upper facing the rear of the carrier and aligned therewith in a fore and aft direction. With the upper and carrier so positioned, the centeringpin 26 is permitted to drop into contact with theunattached socket 42. The position of the socket is then adjusted so that the centerlines of the pin and socket are aligned and thesocket 42 is then secured to thecarrier 14. - The centering sequence for redecking is illustrated in Figures 4-6. With the upper elevated from the carrier, as shown in Figure 1, the centering
pin 26 is retained bypin 40 in its lowered or operative position. Thecarrier 14 is manuevered sufficiently to position thepin 26 so that at least a portion of the angled surface of thecap 32 is directly above thecomplementary surface 44. Thecenterline 46 of thepin 26 will most likely be offset from thecenterline 48 of thesocket 42, as indicated at 50 in Figure 4. Thejacks 22 are then slowly contracted, lowering the upper 12 and causing thepin 26 to contact thesocket 42, as shown in Figure 5. A further contraction of these jacks will cause thepin 26 to be urged by thesocket 42 toward the center thereof. The upper 12 will, therefore, be displaced or moved in a horizontal direction, as indicated by thearrow 52 in Figure 6, relative to thestationary carrier 14. The pin and socket will now be aligned and will result, because there are four of these pins and sockets, in the upper 12 being aligned, within acceptable tolerances, to permit rejoining of the upper and carrier. Thejacks 22 are then extended just enough to permit removal of retainingpin 40 from thebores jacks 22 are then retracted fully to redeck the upper on the carrier. The centeringpin 26 is then manually raised by thehandle 34 to permit the retainingpin 40 to be inserted throughbore 38 below thecap 32 to retain thepin 26 in its stowed position. Swinging movement of the upper on the carrier is then possible. - Movement of the upper in a horizontal direction while supported on the
legs 20 would normally impose large stresses on legs as well as other structural components of the upper. In order to prevent this, thefloats 24, as shown in Figure 7, are provided with abase 54 to which abearing block 56 is secured. An upper bearingplate 58 rests upon and is movable relative to theblock 56. Both of these bearing members have smooth mating surfaces and are lubricated to provide as small a friction force to movement under load as possible. A fabricatedsocket 60 is attached to theplate 58 and facilitates attachment to the rod end of thejack 22 by means of aremovable pin 62. A retaining flange is attached to the periphery of theplate 58 and limits lateral movement of theplate 58 relative to theblock 56. Thefloat 24 is initially positioned as shown in Figure 7 with theblock 56 centered on theplate 58. This relationship is established by aligning the edges of aplate 66, on which theblock 56 is centered and attached, forming a part of the fabricatedbase 54 with aflange 64 attached toplate 58. During the centering sequence illustrated in Figure 6, theleg 20 andjack 22 will also be displaced or moved laterally. Thebearing plate 58 and its attached members will be able to move laterally as shown in Figure 8, to accommodate the movement of the upper 12. As shown in Figure 9, the movement of theplate 58 is universal in a horizontal plane and within the limits determined by contact between theflange 64 and theblock 56.Handles plate 58 and thebase 54 respectively facilitate transport and positioning thereof. - While a preferred embodiment of the present invention has been shown and described herein, it will be appreciated that various changes and modifications may be made therein without departing from the spirit of the invention as defined by the scope of the appended claims.
Claims (6)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US48764083A | 1983-04-22 | 1983-04-22 | |
US487640 | 1983-04-22 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0126302A2 true EP0126302A2 (en) | 1984-11-28 |
EP0126302A3 EP0126302A3 (en) | 1986-02-05 |
EP0126302B1 EP0126302B1 (en) | 1988-01-13 |
Family
ID=23936556
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19840104404 Expired EP0126302B1 (en) | 1983-04-22 | 1984-04-18 | Centering arrangement for redecking of upper crane |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0126302B1 (en) |
JP (1) | JPS6012494A (en) |
DE (1) | DE3468663D1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1990013461A1 (en) * | 1989-04-28 | 1990-11-15 | Raa Koort | Working machine with stabilised driver's seat |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6250382B2 (en) * | 2013-12-25 | 2017-12-20 | 日本車輌製造株式会社 | Boom desorption structure |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1801878A1 (en) * | 1967-10-09 | 1969-07-10 | Western Electric Co | Method and device for holding a workpiece arrangement, in particular miniature workpieces |
US3460697A (en) * | 1967-02-07 | 1969-08-12 | Dobson Ltd W E & F | Transportable load carrying appliances |
US3624784A (en) * | 1970-06-30 | 1971-11-30 | Harnischfeger Corp | Decking and undecking apparatus for a truck crane |
DE2119030A1 (en) * | 1971-04-20 | 1972-11-09 | Fried. Krupp Gmbh, 4300 Essen | Railway crane |
DE2227593A1 (en) * | 1971-07-01 | 1973-01-11 | Clark Equipment Co | ARRANGEMENT AND PROCEDURE FOR REMOVABLE MOUNTING OF THE TURNTLE ON HEAVY CRANES |
US3923407A (en) * | 1974-02-06 | 1975-12-02 | Fmc Corp | Mechanism for connecting and disconnecting crane sections |
US4273244A (en) * | 1979-01-29 | 1981-06-16 | Fmc Corporation | Crane upperstructure self-transferring system |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54122555A (en) * | 1978-03-14 | 1979-09-22 | Kato Seisakushiyo Kk | Upper turning body incorporating device to carrier |
-
1984
- 1984-04-18 DE DE8484104404T patent/DE3468663D1/en not_active Expired
- 1984-04-18 EP EP19840104404 patent/EP0126302B1/en not_active Expired
- 1984-04-23 JP JP8166284A patent/JPS6012494A/en active Granted
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3460697A (en) * | 1967-02-07 | 1969-08-12 | Dobson Ltd W E & F | Transportable load carrying appliances |
DE1801878A1 (en) * | 1967-10-09 | 1969-07-10 | Western Electric Co | Method and device for holding a workpiece arrangement, in particular miniature workpieces |
US3624784A (en) * | 1970-06-30 | 1971-11-30 | Harnischfeger Corp | Decking and undecking apparatus for a truck crane |
DE2119030A1 (en) * | 1971-04-20 | 1972-11-09 | Fried. Krupp Gmbh, 4300 Essen | Railway crane |
DE2227593A1 (en) * | 1971-07-01 | 1973-01-11 | Clark Equipment Co | ARRANGEMENT AND PROCEDURE FOR REMOVABLE MOUNTING OF THE TURNTLE ON HEAVY CRANES |
US3923407A (en) * | 1974-02-06 | 1975-12-02 | Fmc Corp | Mechanism for connecting and disconnecting crane sections |
US4273244A (en) * | 1979-01-29 | 1981-06-16 | Fmc Corporation | Crane upperstructure self-transferring system |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1990013461A1 (en) * | 1989-04-28 | 1990-11-15 | Raa Koort | Working machine with stabilised driver's seat |
Also Published As
Publication number | Publication date |
---|---|
EP0126302A3 (en) | 1986-02-05 |
JPS6012494A (en) | 1985-01-22 |
JPH027876B2 (en) | 1990-02-21 |
EP0126302B1 (en) | 1988-01-13 |
DE3468663D1 (en) | 1988-02-18 |
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