CA1138823A - Traveling attachment for ring supported lift crane - Google Patents
Traveling attachment for ring supported lift craneInfo
- Publication number
- CA1138823A CA1138823A CA000354094A CA354094A CA1138823A CA 1138823 A CA1138823 A CA 1138823A CA 000354094 A CA000354094 A CA 000354094A CA 354094 A CA354094 A CA 354094A CA 1138823 A CA1138823 A CA 1138823A
- Authority
- CA
- Canada
- Prior art keywords
- ring
- crane
- boom
- carrier
- crawler
- 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.)
- Expired
Links
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
-
- 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
- B66C23/84—Slewing gear
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A traveling attachment including a pair of crawler assemblies and frame elements are provided for interconnection to the ring of a ring supported crane so the crane can travel under load. The crawler assemblies may be pivotally mounted and reversely powered to facilitate turning.
A traveling attachment including a pair of crawler assemblies and frame elements are provided for interconnection to the ring of a ring supported crane so the crane can travel under load. The crawler assemblies may be pivotally mounted and reversely powered to facilitate turning.
Description
This inven-tion relates generally to lift cranes and more particularly concerns a ~raveling a-ttachment for ring supported cranes.
In response to ever-increasing user needs, self-propelled cranes have been made capable of liEting ever greater loads.
While a number of factors enter into determining crane capacity, a basic limitation arises from the :Eact -tha-t, inevitably, the weight of the crane and its load must be tran~ferred to the earth in some stable fashion, and, if rotation of the load is desired, the crane-earth connection must be made stable through the arc of crane rotation.
A significant increase in crane capacity was achieved by providing a self-propelled crane with the support ring and extended boom carrier disclosed and claimed in U.S. patent Nos. 3,~85,3~3 and 3,878,9~4, assigned to the assignee of the present inven-tion. In this design, the weight of the crane and its load is t.ransferred to the ground through a large diameter, track-like ring. As shown .in these patents, and as practiced commercially for some years, the support ring is either blocked into place by timbers fitted and wedged beneath and completely around the ring or is supported by a plurality of jacks spaced around the periphery of the ring.
The primary aim of the present invention is to provide a crane having an upper structure pivoted on a lower car body including crawler means for moving the crane over the ground with a pair of support beams secured to and forming a.part of the lower car body, a track-like ring secured to the beams and horizontally surrounding the lower car body and said crawler means, said beams extending fore and aft beneath and beyond the periphery of said ring, a boom carrier pivoted for vertical movement on the upper structure and riding for rotation on the ring, a boom mounted on the boom carrier for lifting a load, a counterweight carrier pivoted for vertical movement on the upper structure and riding for rotation on the ring, means ~i3~
nterconnecting -the counterweight carrier and the boom i-or counteracting a heavy load, and characterized by a traveling suppor-t attachment including a pair of laterally spaced crawler assemblies attached outward oE the ring to the forward ends of the pair of beams and means including a cross frame interconnect-ing the crawler assemblies and a plurality of frame elements interconnecting the crawler assemblies and the lower car body for supporting the ring to permit movement of the cr~ne and ring over the ground while the boom is lifting a heavy load.
Figure 1 is a fragmentary elevation of a crane support structure embodying the present invention; and FigO 2 is a section taken approximately along the line
In response to ever-increasing user needs, self-propelled cranes have been made capable of liEting ever greater loads.
While a number of factors enter into determining crane capacity, a basic limitation arises from the :Eact -tha-t, inevitably, the weight of the crane and its load must be tran~ferred to the earth in some stable fashion, and, if rotation of the load is desired, the crane-earth connection must be made stable through the arc of crane rotation.
A significant increase in crane capacity was achieved by providing a self-propelled crane with the support ring and extended boom carrier disclosed and claimed in U.S. patent Nos. 3,~85,3~3 and 3,878,9~4, assigned to the assignee of the present inven-tion. In this design, the weight of the crane and its load is t.ransferred to the ground through a large diameter, track-like ring. As shown .in these patents, and as practiced commercially for some years, the support ring is either blocked into place by timbers fitted and wedged beneath and completely around the ring or is supported by a plurality of jacks spaced around the periphery of the ring.
The primary aim of the present invention is to provide a crane having an upper structure pivoted on a lower car body including crawler means for moving the crane over the ground with a pair of support beams secured to and forming a.part of the lower car body, a track-like ring secured to the beams and horizontally surrounding the lower car body and said crawler means, said beams extending fore and aft beneath and beyond the periphery of said ring, a boom carrier pivoted for vertical movement on the upper structure and riding for rotation on the ring, a boom mounted on the boom carrier for lifting a load, a counterweight carrier pivoted for vertical movement on the upper structure and riding for rotation on the ring, means ~i3~
nterconnecting -the counterweight carrier and the boom i-or counteracting a heavy load, and characterized by a traveling suppor-t attachment including a pair of laterally spaced crawler assemblies attached outward oE the ring to the forward ends of the pair of beams and means including a cross frame interconnect-ing the crawler assemblies and a plurality of frame elements interconnecting the crawler assemblies and the lower car body for supporting the ring to permit movement of the cr~ne and ring over the ground while the boom is lifting a heavy load.
Figure 1 is a fragmentary elevation of a crane support structure embodying the present invention; and FigO 2 is a section taken approximately along the line
2-2 in Fig. l o Turning now to the drawings, there is shown a crane 10 having an upper structure 11 mounted for rotation on a car body 12 through a roller path 13. The crane 10 is normally mobile andt for moving over the ground, crawler assemblies 14 form part of the car body 12.
In order to increase the capacity of the crane 10, a track-like ring 15 is secured to the ends of support beams 16 and 17 so as to horizontally surround the car body 120 Preferably, the ring has an I-beam cross section with a hardened upper path surface~ To adapt the crane for this ring support configuration, the support beams 16, 17 are secured to the car body 12 running outboard and parallel to the crawler assemblies 14 so that the beams become part of the car body.
The geometry of the crane 10 contributes to its high capac-ities when used with the ring support. A boom carrier 25 is pivoted for vertical movement on the upper structure 11 and pro-vided with a roller assembly 26 for rotation on the ring 15.
A boom 27 is mounted on the carrier at what becomes the load lifting fulcrum 28 of the system, and a load lift line 29 runs along and over the end of the boom 27. A counterweight carrier 31 is also pivoted for vertical movement at 32 on the upper structure 11 and the carrier extends the opposite direction from 1~ .
f~
the boom carrier 25 to ride on the rlng 15 through roller assemblies 33, only one of which is shown. Counterweights 34 are stacked on the carrier 31.
In ef~ect, all structure to the non-boom side of the fulcrum 28 is available for counterbalancing and stabili~ing the crane 10. Preferably, a mast 36 is mounted on the carrier 25 and boom lift rigging 37 interconnects the tops of the mast 36 and the boom 27 for moving the boom vertically. The mast 36 is secured by pendants 3~ to gantry struc-ture 39 on the upper structure 11 to form a substantially rigid assembly, and o-ther pendants 41 provide substantially rigid connections between the counterweight carrier 31 and the top of the mast 36. Struts 42 establish the substantially fixed angular posit.ion to the mast 36. This geometry creates a stable, high capacity crane.
A traveling support attachment 45 is provided for supporting the ring 15 under the fulcrum 28 to permit movement of -the crane 10 and ring 15 over the ground while the boom 27 is lifting a heavy load. In the pre~erred embodiment the traveling support attachment 45 includes a pair of laterally spaced crawler assem-blies 46 and 47 respectively located adjacent the forward ends of the support beams 16 and 17. The crawler assemblies 46, 47 are connected together by a frame element 48 which, in turn, is interconnected from adjacent its ends to the car body 12 by a pair of frame elements 51 and 52 on which the ring 15 is sup-ported, Preferably, the frame elements 51, 52 are pin connected to the car body 12 and project forwardly in diverging relation between the lateral support beams 16, 17 where they are connected to the frame element 4~.
~ nen a heavy load is lifted by the boom 27, the forces are transmitted down through the boom 27 and mast 36 to the boom carrier 25 riding on the ring 15 adjacent the fulcrum 28. The lifting forces are also transmitted through pendants 41 to the counterweights 34 stacked on tha carrier 31 -tending to lift the carrier 31 off ~he ring 15. Since ~he at-tachment frame elements 51, 52 support the ring lS adjacent the fulcrum 28, the lifting forces pass primarily down through the ring 15 to the a-ttachment assembly and are resisted by the crawler assemblies 46, 47 engaging the ground. If it is desired to travel with a load, power may be applied to the main crawler assemblies 14 and the crane 10 and ring lS may be "walked" ahead with the load being primarily supported by the traveling support attachment 45 and its crawler assemblies 46, 47. Of course, the crane 10 may also be traveled rearwardly under load by reversing the direction of movement of the main crawlers 14.
The crawler assemblies 46, 47 are preferably pivotally mounted to reinforced end portions 53, 54 of the frame 48 by yoke elements 55 and 56 and vertical pivot posts 57 and 58, respectively. Additionally, hydraulic cylinders 61 and 62 are provided interconnecting the frame end portions 53, 54 and the crawler assemblies 46, 47 to permit turning thq craw].er assemblles 46, 47 and thus facilitate moving the crane 10 under load about a curved path.
While the crawler assemblies 45, 46 need not be independently powered for most applications, -the mobility and maneuverability of the crane 10 traveling under load may be further enhanced by selectively and reversibly powering the crawlers 45, 46 such as by independent hydraulic motors 65 and 66, respectively. Operation of these motors 65, 66 not only increases the traction power of the crane 10, since the load is primarily supported on the crawlers 45, 46 but also, insures more positive steering control when the crane is moved in a curved path.
The counterweight carrier 31 may be provided with wheeled support means 67 to resist rearward tipping of the crane 10 and ring 15 when a heavy load is not being supported by the boom 27. This avoids the necessity of removing portions of the counterweight 34 from the carrier between successive heavy lift ~ .
sd/~r~
!
operations. Preferably, the ~heeled support means 67 are piv-otally mounted to the coun-terweight carrier about substantially vertical axes such as pivot posts 68 so that -the wheels may caster as the crane 1() turns either during swinging or traveling movement.
It should also be appreciated tha-t the traveling support attachment 45 and/or the wheeled support means 67 may be quickly and conveniently attached and detached from a standard ring suppor-ted crane such as disclosed in U.S. pat.ent No. 3,878,944 which is incorporated herein by reference. I~s shown in that patent, a plurali.ty of ring support arms 71 are pivoted for vertical movement on the car body 12 and extend outwardly to underlie the ring 15 at spaced points around the ring periphery.
A plurality of jacks 72 are positioned one at the end o:E each oE
the arms 71 with the jac]cs 72 being sized so as to en~age the ground when extended and l:ift the ring 15, the car body 12 and the crawler assemblies 1~ from -the ground.
To facilitate setting up the ring 15, hydraulic jacks 73 are mounted at the four ends o~ the support beams 16, 17. Manipu-lation of these jacks 73 allows the ring 15 to be lifted and leveled, whereupon the manual jacks 72 can be quickly extended to provide firm support for the ring completely around its periphery and to facilitate coupling and uncoupling the traveling support attachment 45 and/or the wheeled support means 67.
~5--
In order to increase the capacity of the crane 10, a track-like ring 15 is secured to the ends of support beams 16 and 17 so as to horizontally surround the car body 120 Preferably, the ring has an I-beam cross section with a hardened upper path surface~ To adapt the crane for this ring support configuration, the support beams 16, 17 are secured to the car body 12 running outboard and parallel to the crawler assemblies 14 so that the beams become part of the car body.
The geometry of the crane 10 contributes to its high capac-ities when used with the ring support. A boom carrier 25 is pivoted for vertical movement on the upper structure 11 and pro-vided with a roller assembly 26 for rotation on the ring 15.
A boom 27 is mounted on the carrier at what becomes the load lifting fulcrum 28 of the system, and a load lift line 29 runs along and over the end of the boom 27. A counterweight carrier 31 is also pivoted for vertical movement at 32 on the upper structure 11 and the carrier extends the opposite direction from 1~ .
f~
the boom carrier 25 to ride on the rlng 15 through roller assemblies 33, only one of which is shown. Counterweights 34 are stacked on the carrier 31.
In ef~ect, all structure to the non-boom side of the fulcrum 28 is available for counterbalancing and stabili~ing the crane 10. Preferably, a mast 36 is mounted on the carrier 25 and boom lift rigging 37 interconnects the tops of the mast 36 and the boom 27 for moving the boom vertically. The mast 36 is secured by pendants 3~ to gantry struc-ture 39 on the upper structure 11 to form a substantially rigid assembly, and o-ther pendants 41 provide substantially rigid connections between the counterweight carrier 31 and the top of the mast 36. Struts 42 establish the substantially fixed angular posit.ion to the mast 36. This geometry creates a stable, high capacity crane.
A traveling support attachment 45 is provided for supporting the ring 15 under the fulcrum 28 to permit movement of -the crane 10 and ring 15 over the ground while the boom 27 is lifting a heavy load. In the pre~erred embodiment the traveling support attachment 45 includes a pair of laterally spaced crawler assem-blies 46 and 47 respectively located adjacent the forward ends of the support beams 16 and 17. The crawler assemblies 46, 47 are connected together by a frame element 48 which, in turn, is interconnected from adjacent its ends to the car body 12 by a pair of frame elements 51 and 52 on which the ring 15 is sup-ported, Preferably, the frame elements 51, 52 are pin connected to the car body 12 and project forwardly in diverging relation between the lateral support beams 16, 17 where they are connected to the frame element 4~.
~ nen a heavy load is lifted by the boom 27, the forces are transmitted down through the boom 27 and mast 36 to the boom carrier 25 riding on the ring 15 adjacent the fulcrum 28. The lifting forces are also transmitted through pendants 41 to the counterweights 34 stacked on tha carrier 31 -tending to lift the carrier 31 off ~he ring 15. Since ~he at-tachment frame elements 51, 52 support the ring lS adjacent the fulcrum 28, the lifting forces pass primarily down through the ring 15 to the a-ttachment assembly and are resisted by the crawler assemblies 46, 47 engaging the ground. If it is desired to travel with a load, power may be applied to the main crawler assemblies 14 and the crane 10 and ring lS may be "walked" ahead with the load being primarily supported by the traveling support attachment 45 and its crawler assemblies 46, 47. Of course, the crane 10 may also be traveled rearwardly under load by reversing the direction of movement of the main crawlers 14.
The crawler assemblies 46, 47 are preferably pivotally mounted to reinforced end portions 53, 54 of the frame 48 by yoke elements 55 and 56 and vertical pivot posts 57 and 58, respectively. Additionally, hydraulic cylinders 61 and 62 are provided interconnecting the frame end portions 53, 54 and the crawler assemblies 46, 47 to permit turning thq craw].er assemblles 46, 47 and thus facilitate moving the crane 10 under load about a curved path.
While the crawler assemblies 45, 46 need not be independently powered for most applications, -the mobility and maneuverability of the crane 10 traveling under load may be further enhanced by selectively and reversibly powering the crawlers 45, 46 such as by independent hydraulic motors 65 and 66, respectively. Operation of these motors 65, 66 not only increases the traction power of the crane 10, since the load is primarily supported on the crawlers 45, 46 but also, insures more positive steering control when the crane is moved in a curved path.
The counterweight carrier 31 may be provided with wheeled support means 67 to resist rearward tipping of the crane 10 and ring 15 when a heavy load is not being supported by the boom 27. This avoids the necessity of removing portions of the counterweight 34 from the carrier between successive heavy lift ~ .
sd/~r~
!
operations. Preferably, the ~heeled support means 67 are piv-otally mounted to the coun-terweight carrier about substantially vertical axes such as pivot posts 68 so that -the wheels may caster as the crane 1() turns either during swinging or traveling movement.
It should also be appreciated tha-t the traveling support attachment 45 and/or the wheeled support means 67 may be quickly and conveniently attached and detached from a standard ring suppor-ted crane such as disclosed in U.S. pat.ent No. 3,878,944 which is incorporated herein by reference. I~s shown in that patent, a plurali.ty of ring support arms 71 are pivoted for vertical movement on the car body 12 and extend outwardly to underlie the ring 15 at spaced points around the ring periphery.
A plurality of jacks 72 are positioned one at the end o:E each oE
the arms 71 with the jac]cs 72 being sized so as to en~age the ground when extended and l:ift the ring 15, the car body 12 and the crawler assemblies 1~ from -the ground.
To facilitate setting up the ring 15, hydraulic jacks 73 are mounted at the four ends o~ the support beams 16, 17. Manipu-lation of these jacks 73 allows the ring 15 to be lifted and leveled, whereupon the manual jacks 72 can be quickly extended to provide firm support for the ring completely around its periphery and to facilitate coupling and uncoupling the traveling support attachment 45 and/or the wheeled support means 67.
~5--
Claims (5)
1. A crane having an upper structure pivoted on a lower car body including crawler means for moving the crane over the ground with a pair of support beams secured to and forming a part of said lower car body, a track-like ring secured to said beams and horizontally surrounding said lower car body and said crawler means, said beams extending fore and aft beneath and beyond the periphery of said ring, a boom carrier pivoted for vertical movement on said upper structure and riding for rotation on said ring, a boom mounted on said boom carrier for lifting a load, a counterweight carrier pivoted for vertical movement on said upper structure and riding for rotation on said ring, means interconnecting said counterweight carrier and said boom for counteracting a heavy load, and characterized by a traveling support attachment including a pair of laterally spaced crawler assemblies attached outward of said ring to the forward ends of said pair of beams and means including a cross frame interconnecting said crawler assemblies and a plurality of frame elements interconnecting said crawler assemblies and said lower car body for supporting said ring to permit movement of said crane and ring over the ground while said boom is lifting a heavy load.
2. The combination of claim 1 wherein said crawler assemblies are connected to said frame elements through vertical pivot posts and means are provided for pivoting said crawler assemblies about the axes of said posts.
3. The combination of claim 1 wherein said crawler assemblies each include an endless track and hydraulic motor means provided for selectively and reversibly driving said tracks.
4. The combination of claim 1 wherein said counterweight extends outboard of said ring and wheeled support means are provided under said counterweight carrier outboard of said ring.
5. The combination of claim 1 wherein said wheeled support means are pivotally mounted to said counter-weight carrier about substantially vertical axes.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US5828579A | 1979-07-17 | 1979-07-17 | |
| US058,285 | 1979-07-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1138823A true CA1138823A (en) | 1983-01-04 |
Family
ID=22015854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000354094A Expired CA1138823A (en) | 1979-07-17 | 1980-06-16 | Traveling attachment for ring supported lift crane |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS5617892A (en) |
| CA (1) | CA1138823A (en) |
| DE (1) | DE3026884A1 (en) |
| FR (1) | FR2461677B1 (en) |
| GB (1) | GB2053147B (en) |
| NL (1) | NL188340C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4449635A (en) * | 1980-03-07 | 1984-05-22 | The Manitowoc Company, Inc. | Imaginary pivot lift crane |
| CN103574232B (en) * | 2012-07-26 | 2015-09-23 | 徐工集团工程机械股份有限公司 | Self-propelled type power plant and the auxiliary mounting system for hoist |
| CN116979422B (en) * | 2023-09-25 | 2024-01-19 | 东北林业大学 | Operation and maintenance cleaning device for power equipment |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1943196A (en) * | 1932-07-18 | 1934-01-09 | Clarence F Ward | Attachment for tractor cranes |
| DE1108877B (en) * | 1960-02-03 | 1961-06-15 | Maschf Augsburg Nuernberg Ag | Automobile crane with support table |
| DE1180502B (en) * | 1962-11-17 | 1964-10-29 | Maschf Augsburg Nuernberg Ag | Crane system for large load capacities and load moments |
| DE1258054B (en) * | 1965-05-20 | 1968-01-04 | Beteiligungs & Patentverw Gmbh | Heavy duty truck crane |
| US3485383A (en) * | 1968-02-09 | 1969-12-23 | Manitowoc Co | Auxiliary support for cranes |
| US3842984A (en) * | 1970-12-29 | 1974-10-22 | American Hoist & Derrick Co | Crane counterbalancing trailer assembly |
| US3878944A (en) * | 1973-08-30 | 1975-04-22 | Dantel E Beduhn | Crane support structure |
| US3868022A (en) * | 1973-11-23 | 1975-02-25 | Harnischfeger Corp | Self-propelled heavy duty mobile crane |
| DE2438439A1 (en) * | 1974-08-09 | 1976-02-19 | Riggers Mfg Co | Slewing jib crane - has tailweight unit with travel gear slewing superstructure with main jib and gantry |
| US4042115A (en) * | 1976-07-28 | 1977-08-16 | The Manitowoc Company, Inc. | Rotary counterweight crane with a removal track section |
| US4103783A (en) * | 1977-05-31 | 1978-08-01 | The Manitowoc Company, Inc. | Platform crane with counterweight and boom carrier support linkages |
-
1980
- 1980-06-04 NL NL8003276A patent/NL188340C/en not_active IP Right Cessation
- 1980-06-16 CA CA000354094A patent/CA1138823A/en not_active Expired
- 1980-06-23 JP JP8413480A patent/JPS5617892A/en active Granted
- 1980-06-23 GB GB8020468A patent/GB2053147B/en not_active Expired
- 1980-06-27 FR FR8014384A patent/FR2461677B1/en not_active Expired
- 1980-07-16 DE DE19803026884 patent/DE3026884A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6127316B2 (en) | 1986-06-25 |
| GB2053147B (en) | 1983-05-05 |
| JPS5617892A (en) | 1981-02-20 |
| NL188340C (en) | 1992-06-01 |
| GB2053147A (en) | 1981-02-04 |
| FR2461677B1 (en) | 1986-05-02 |
| DE3026884C2 (en) | 1989-06-15 |
| DE3026884A1 (en) | 1981-02-12 |
| NL8003276A (en) | 1981-01-20 |
| NL188340B (en) | 1992-01-02 |
| FR2461677A1 (en) | 1981-02-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |