EP1264938B1 - Earthmoving machine and actuating device for controlling lateral movement of a loading shovel - Google Patents
Earthmoving machine and actuating device for controlling lateral movement of a loading shovel Download PDFInfo
- Publication number
- EP1264938B1 EP1264938B1 EP02076988.1A EP02076988A EP1264938B1 EP 1264938 B1 EP1264938 B1 EP 1264938B1 EP 02076988 A EP02076988 A EP 02076988A EP 1264938 B1 EP1264938 B1 EP 1264938B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- actuating
- sledge
- machine
- rail
- telescopic
- 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 - Lifetime
Links
- 230000003019 stabilising effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/38—Cantilever beams, i.e. booms;, e.g. manufacturing processes, forms, geometry or materials used for booms; Dipper-arms, e.g. manufacturing processes, forms, geometry or materials used for dipper-arms; Bucket-arms
- E02F3/382—Connections to the frame; Supports for booms or arms
- E02F3/386—Connections to the frame; Supports for booms or arms the boom being laterally shiftable relative to the frame
Definitions
- the present invention relates to an earthmoving machine, more specifically referred to as a tractor loader backhoe (TLB).
- TLB tractor loader backhoe
- Such vehicle comprises a supporting frame having a given longitudinal axis, provided at the front with a larger loader mechanism and at the rear with a foldable backhoe arm structure having a shovel or bucket of smaller dimensions at its free end.
- actuating means are required for moving the backhoe linearly along the guide rail.
- such actuating means takes the form of a hydraulic cylinder which is connected to a semi-loop shaped chain guided over oppositely provided guide rollers; the chain in turn being attached to the sledge supporting the backhoe structure.
- the loop in the chain is provided to double the stroke of the hydraulic cylinder enabling a cylinder of a length equalling only half the width of the vehicle to nevertheless move the backhoe structure fully from one side of the vehicle to the other.
- the actuating means consists of a hydraulic actuator cylinder directly connected to the sledge supporting the backhoe instead of through a chain mechanism.
- the hydraulic cylinder which is essentially a telescopic device, is fixed at one end to the vehicle supporting frame, extends parallel to the guide rail, and has an output rod fixed at the free end to the sledge supporting the backhoe.
- the cylinder is movable between an extracted position, in which the output rod is substantially outside the actuator cylinder, and a withdrawn position, in which the output rod is substantially inside the actuator cylinder.
- Such an embodiment can be derived e.g. from JP 49 039903 A .
- telescopic device is intended to mean a device comprising at least two members sliding one inside the other.
- an earthmoving machine having a given longitudinal axis, and comprising :
- the earthmoving machine is characterized in that said actuating means comprise at least two telescopic actuating devices arranged in series, whereby the width of said actuating means (15) in its fully retracted position is fully contained within the width of said sledge (14), whereby a first free end of said actuating means (15) is connected to one of said uprights (10), and whereby a second free end of said actuating means (15) is connected to an end of said sledge (14) opposite to said first free end such that said sledge (14) is operable to travel the full width of said machine (1) without said actuating means (15) laterally sticking out of said machine (1).
- Number 1 in Figure 1 indicates as a whole an earthmoving machine or TLB comprising a frame 2 having a longitudinal axis 3, the frame being supported by two conventional axles (not shown) extending perpendicular to axis 3 and each in turn being supported by a pair of wheels 4.
- Machine 1 further comprises a cab 5 fitted to the frame 2 and having a steering wheel 6 and a seat 7 for the operator of machine 1.
- Two conventional loading shovels 8, 9 are located on opposite sides of the cab 5 along axis 3; shovel or loader 8 being located on the front side of the machine and shovel or backhoe 9 being located on the rear side of the machine.
- frame 2 comprises two uprights 10 located on opposite sides of axis 3 and extending parallel to a direction 11 perpendicular to axis 3.
- the uprights 10 house a stabilising mechanism which can be brought into contact with the ground for improving the stability of the vehicle when operating the backhoe 9.
- Two guide rails 12 extend between the uprights 10 in a direction 13 perpendicular to direction 11 and to axis 3, and slidably support a sledge 14 forming part of the backhoe 9.
- Sledge 14 is moved linearly along rails 12 in the direction 13 by an actuating device 15 comprising an actuating cylinder 16, which is fixed at the free end to one of the uprights 10.
- Cylinder 16 has an axis 17 substantially parallel to direction 13 and hence to the sledge 14 and comprises an output rod 18.
- Rod 18 is a telescopic rod coaxial with axis 17 and comprises on the one hand an outer portion 18a mounted to slide inside cylinder 16 and on the other hand an inner portion 18b mounted to slide inside portion 18a. A free end of inner portion 18b is connected to the sledge 14 through a spherical joint 19 for compensating for any impact on slide 14 which, without joint 19, might flex and/or deform rod 18.
- Rod 18 is movable between a withdrawn start position ( Figures 2b and 3b ), in which rod 18 is housed inside cylinder 16, and sledge 14 is positioned contacting a first stop member 20a, and an extracted end position ( Figures 2a and 3a ), in which the whole of rod 18 extends outside cylinder 16, and sledge 14 is positioned contacting a second stop member 20b.
- Rod portion 18a therefore defines, together with cylinder 16 and rod portion 18b, a first and, respectively, a second telescopic device 21a, 21b, which in turn define actuating device 15.
- Sledge 14 is provided with a known locking device 22 for maintaining sledge 14, and therefore the backhoe 9, in a given position along the rails 12.
- the device 22 comprises a number of actuating cylinders 23 (four in the example shown) connected to the sledge 14, parallel to axis 3 and facing the rails 12.
- the actuating cylinders 23 have respective output rods (not shown), each of which is movable to and from an extracted position in which the output rod engages a respective rail 12, for locking the sledge 14 in position relative to the rails 12.
- the sledge 14 occupies approximately one third of the width of the machine 1, while the actuating device 15, in its fully retracted position, is fully contained within the width of the sledge. Due to the provision of the double telescopic actuator 15, the sledge 14 is operable to travel the full width of the machine 1 without any part of the actuator device 15 ever laterally sticking out of the machine 1 in whatever position of the sledge 14. It will be appreciated that if the width of the sledge 14 would be reduced further e.g. to 1/4 of the vehicle width, then a triple telescopic actuator 15 could be employed, obtaining the same result.
- Machine 1 in the Figures 4 and 5 embodiment differs from the Figures 2 and 3 machine by actuating device 15 comprising two actuating cylinders 24, 25, each defining a respective telescopic device, and which have respective axes 26, 27 substantially parallel to each other and to direction 13, are arranged substantially in series with each other, and are positioned facing respective uprights 10.
- actuating device 15 comprising two actuating cylinders 24, 25, each defining a respective telescopic device, and which have respective axes 26, 27 substantially parallel to each other and to direction 13, are arranged substantially in series with each other, and are positioned facing respective uprights 10.
- Cylinders 24, 25 have respective output rods 28, 29, which are coaxial with respective axes 26, 27, and are mounted to slide inside respective cylinders 24, 25. More specifically, rod 29 is fixed at the free end to one of uprights 10, while rod 28 is connected at the free end to sledge 14 with the interposition of a spherical joint 30.
- Each rod 28, 29 is movable between on the one hand a withdrawn start position ( Figures 4b and 5b ), in which rod 28, 29 is housed inside respective cylinder 24, 25, and sledge 14 is positioned contacting stop member 20a and on the other hand an extracted end position ( Figures 4a and 5a ), in which the whole of rod 28, 29 extends outside respective cylinder 24, 25, and sledge 14 is positioned contacting stop member 20b.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Operation Control Of Excavators (AREA)
- Component Parts Of Construction Machinery (AREA)
- Forklifts And Lifting Vehicles (AREA)
Description
- The present invention relates to an earthmoving machine, more specifically referred to as a tractor loader backhoe (TLB). Traditionally, such vehicle comprises a supporting frame having a given longitudinal axis, provided at the front with a larger loader mechanism and at the rear with a foldable backhoe arm structure having a shovel or bucket of smaller dimensions at its free end. It is known to attach the backhoe structure to the rear of the vehicle either at a central, fixed location (also known as "central pivot" connection), or to attach the structure to a supporting sledge fit for transverse movement along a guide rail extending crosswise to the longitudinal axis of the vehicle (also know as "side shift" connection). In the latter case, actuating means are required for moving the backhoe linearly along the guide rail.
- Typically, such actuating means takes the form of a hydraulic cylinder which is connected to a semi-loop shaped chain guided over oppositely provided guide rollers; the chain in turn being attached to the sledge supporting the backhoe structure. The loop in the chain is provided to double the stroke of the hydraulic cylinder enabling a cylinder of a length equalling only half the width of the vehicle to nevertheless move the backhoe structure fully from one side of the vehicle to the other. Although a complete left to right positional range is available with the above arrangement, it nevertheless suffers from the disadvantage that it requires a lot of expensive components which all need servicing for avoiding malfunctioning of the system. Such an embodiment can be derived e.g. from
EP-A-0 692 579 . - In another, less complex embodiment, the actuating means consists of a hydraulic actuator cylinder directly connected to the sledge supporting the backhoe instead of through a chain mechanism. The hydraulic cylinder, which is essentially a telescopic device, is fixed at one end to the vehicle supporting frame, extends parallel to the guide rail, and has an output rod fixed at the free end to the sledge supporting the backhoe. In known manner, the cylinder is movable between an extracted position, in which the output rod is substantially outside the actuator cylinder, and a withdrawn position, in which the output rod is substantially inside the actuator cylinder. Such an embodiment can be derived e.g. from
JP 49 039903 A - In the following description, the term "telescopic device" is intended to mean a device comprising at least two members sliding one inside the other.
- Since the length of the actuator cylinder must therefore be at least equal to the desired side-shift travel of the backhoe along the guide rail, it would be impossible with such an arrangement to obtain a full shift of the backhoe from one lateral side to the other without the actuator cylinder sticking out from the side of the vehicle in one of its extreme positions. This of course is not acceptable from a safety point of view and therefore, in the above type of arrangements, less than a full shift over the complete rear width of the vehicle has to be accepted as a limitation, which naturally reduces the versatility of the TLB in use.
- It is therefore an object of the present invention to provide an earthmoving machine designed to eliminate the aforementioned drawbacks.
- According to the present invention, there is provided an earthmoving machine having a given longitudinal axis, and comprising :
- at least one guide rail extending crosswise to said axis between two uprights (10);
- at least one loading structure operatively connected to said rail and selectively positionable along the rail;
- actuating means for moving said loading structure linearly along said rail; and
- a sledge (14) operatively connecting the loading structure (9) to the at least one guide rail (12).
- The earthmoving machine is characterized in that said actuating means comprise at least two telescopic actuating devices arranged in series, whereby the width of said actuating means (15) in its fully retracted position is fully contained within the width of said sledge (14), whereby a first free end of said actuating means (15) is connected to one of said uprights (10), and whereby a second free end of said actuating means (15) is connected to an end of said sledge (14) opposite to said first free end such that said sledge (14) is operable to travel the full width of said machine (1) without said actuating means (15) laterally sticking out of said machine (1).
- A non-limiting embodiment of the present invention will now be described by way of example with reference to the accompanying drawings, in which:
-
Figure 1 shows a schematic side view of a preferred embodiment of the earthmoving machine according to the present invention; -
Figure 2 shows a rear view of theFigure 1 machine in two different operating positions; -
Figure 3 shows a part ofFigure 2 in more detail and in two different operating positions; -
Figure 4 is a view similar toFigure 2 , showing a further embodiment of the machine according to the present invention in two different operating positions; and -
Figure 5 is a view similar tofigure 3 , showing a part ofFigure 4 in further detail and in two different operating positions. - Number 1 in
Figure 1 indicates as a whole an earthmoving machine or TLB comprising aframe 2 having a longitudinal axis 3, the frame being supported by two conventional axles (not shown) extending perpendicular to axis 3 and each in turn being supported by a pair ofwheels 4. - Machine 1 further comprises a
cab 5 fitted to theframe 2 and having a steering wheel 6 and a seat 7 for the operator of machine 1. Twoconventional loading shovels cab 5 along axis 3; shovel orloader 8 being located on the front side of the machine and shovel orbackhoe 9 being located on the rear side of the machine. - With reference to
Figures 2 and3 ,frame 2 comprises twouprights 10 located on opposite sides of axis 3 and extending parallel to a direction 11 perpendicular to axis 3. Theuprights 10 house a stabilising mechanism which can be brought into contact with the ground for improving the stability of the vehicle when operating thebackhoe 9. Twoguide rails 12 extend between theuprights 10 in adirection 13 perpendicular to direction 11 and to axis 3, and slidably support asledge 14 forming part of thebackhoe 9. - Sledge 14 is moved linearly along
rails 12 in thedirection 13 by an actuatingdevice 15 comprising an actuatingcylinder 16, which is fixed at the free end to one of theuprights 10.Cylinder 16 has anaxis 17 substantially parallel todirection 13 and hence to thesledge 14 and comprises anoutput rod 18. -
Rod 18 is a telescopic rod coaxial withaxis 17 and comprises on the one hand anouter portion 18a mounted to slide insidecylinder 16 and on the other hand aninner portion 18b mounted to slide insideportion 18a. A free end ofinner portion 18b is connected to thesledge 14 through aspherical joint 19 for compensating for any impact onslide 14 which, withoutjoint 19, might flex and/ordeform rod 18. -
Rod 18 is movable between a withdrawn start position (Figures 2b and3b ), in whichrod 18 is housed insidecylinder 16, andsledge 14 is positioned contacting afirst stop member 20a, and an extracted end position (Figures 2a and3a ), in which the whole ofrod 18 extends outsidecylinder 16, andsledge 14 is positioned contacting asecond stop member 20b. -
Rod portion 18a therefore defines, together withcylinder 16 androd portion 18b, a first and, respectively, a secondtelescopic device actuating device 15. - Sledge 14 is provided with a known
locking device 22 for maintainingsledge 14, and therefore thebackhoe 9, in a given position along therails 12. Thedevice 22 comprises a number of actuating cylinders 23 (four in the example shown) connected to thesledge 14, parallel to axis 3 and facing therails 12. The actuatingcylinders 23 have respective output rods (not shown), each of which is movable to and from an extracted position in which the output rod engages arespective rail 12, for locking thesledge 14 in position relative to therails 12. - As can be observed in
Figures 2a and 2b , thesledge 14 occupies approximately one third of the width of the machine 1, while theactuating device 15, in its fully retracted position, is fully contained within the width of the sledge. Due to the provision of the doubletelescopic actuator 15, thesledge 14 is operable to travel the full width of the machine 1 without any part of theactuator device 15 ever laterally sticking out of the machine 1 in whatever position of thesledge 14. It will be appreciated that if the width of thesledge 14 would be reduced further e.g. to 1/4 of the vehicle width, then a tripletelescopic actuator 15 could be employed, obtaining the same result. - Machine 1 in the
Figures 4 and5 embodiment differs from theFigures 2 and3 machine by actuatingdevice 15 comprising two actuatingcylinders respective axes direction 13, are arranged substantially in series with each other, and are positioned facingrespective uprights 10. -
Cylinders respective output rods respective axes respective cylinders rod 29 is fixed at the free end to one ofuprights 10, whilerod 28 is connected at the free end to sledge 14 with the interposition of aspherical joint 30. - Each
rod Figures 4b and5b ), in whichrod respective cylinder sledge 14 is positioned contactingstop member 20a and on the other hand an extracted end position (Figures 4a and5a ), in which the whole ofrod respective cylinder sledge 14 is positioned contactingstop member 20b.
Claims (5)
- An earthmoving machine (1) having a frame (2) having a given longitudinal axis (3), and comprising :- at least one guide rail (12) extending crosswise to said axis (3) between two uprights (10) located on opposite sides of said axis (3) and extending parallel to a direction (11) perpendicular to said axis (3);- at least one loading structure (9) operatively connected to said rail (12) and selectively positionable along the rail (12); and- actuating means (15) for moving said loading structure (9) linearly along said rail (12);- a sledge (14) operatively connecting the loading structure (9) to the at least one guide rail (12), said sledge (14) occupying approximately one third of the width of said machine (1); andcharacterized in that said actuating means (15) comprise at least two telescopic actuating devices (21a, 21b; 24, 25) arranged in series, whereby the width of said actuating means (15) in its fully retracted position is fully contained within the width of said sledge (14), whereby a first free end of said actuating means (15) is connected to one of said uprights (10), and whereby a second free end of said actuating means (15) is connected to an end of said sledge (14) opposite to said first free end such that said sledge (14) is operable to travel the full width of said machine (1) without said actuating means (15) laterally sticking out of said machine (1).
- A machine according to claim 1, characterized in that each said telescopic actuating device (21a, 21b; 24, 25) is defined by an actuating cylinder (24, 25) substantially parallel to said rail (12) and having a respective output rod (28, 29).
- A machine according to claim 1, characterized in that said actuating means (15) comprise an actuating cylinder (16) substantially parallel to said rail (12); said cylinder (16) having a telescopic output rod (18) in turn comprising an outer portion (18a) mounted to slide inside said further actuating cylinder (16), and an inner portion (18b) mounted to slide inside the outer portion (18a); one of said telescopic actuating devices (21a, 21b) being defined by said further actuating cylinder (16) and by said outer portion (18a), and the other of said telescopic actuating devices (21a, 21b) being defined by said outer portion (18a) and by said inner portion (18b).
- A machine according to any of the preceding claims, characterized in that the machine further comprises a supporting frame (2) in turn comprising said rail (12); at least one of said telescopic actuating devices (21a, 21b; 24, 25) being connected to said frame (2) or to said loading structure (9) by joint means (19; 30).
- A machine according to claim 4, characterized in that said joint means (19; 30) are spherical joint means.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITBO20010365 | 2001-06-08 | ||
IT2001BO000365A ITBO20010365A1 (en) | 2001-06-08 | 2001-06-08 | EARTH-MOVING MACHINE AND ACTUATOR DEVICE FOR THE SIDE MOVEMENT OF A RELATIVE LOADER LOADER |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1264938A1 EP1264938A1 (en) | 2002-12-11 |
EP1264938B1 true EP1264938B1 (en) | 2013-08-07 |
Family
ID=11439410
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02076988.1A Expired - Lifetime EP1264938B1 (en) | 2001-06-08 | 2002-05-21 | Earthmoving machine and actuating device for controlling lateral movement of a loading shovel |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1264938B1 (en) |
IT (1) | ITBO20010365A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2559242C2 (en) * | 2009-06-03 | 2015-08-10 | СиЭнЭйч ИТАЛИЯ СПА | Hydraulic actuation of sliding carriage |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITTO20020186A1 (en) | 2002-03-06 | 2003-09-08 | Fiat Hitachi Excavators S P A | EARTH-MOVING VEHICLE, AND METHOD TO ADJUST THE DESCENT OF AN OPERATING ARM OF SUCH VEHICLE. |
GB2559582A (en) * | 2017-02-09 | 2018-08-15 | Edwards Farm Machinery Ltd | Side-shift attachment for tractor |
DE102019007732B4 (en) * | 2019-11-07 | 2022-08-11 | Gerhard Dücker GmbH & Co. KG Landmaschinenfabrik | mower and/or cutter |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI41369B (en) * | 1962-07-05 | 1969-06-30 | Arturo Masera | |
GB1368255A (en) * | 1971-09-03 | 1974-09-25 | Int Harvester Co | |
AU5111873A (en) * | 1972-01-18 | 1974-07-25 | Equipment Co Pty Ltd Const | Improvement in backhoes |
JPS5217644B2 (en) | 1972-08-24 | 1977-05-17 | ||
US3785705A (en) * | 1972-09-20 | 1974-01-15 | Constr Materials Inc | Concrete median and curb sawing machine |
JPS5153702A (en) * | 1974-11-05 | 1976-05-12 | Mitsubishi Heavy Ind Ltd | Kutsusakusochino pawaasuraidokiko |
US4113031A (en) * | 1977-07-25 | 1978-09-12 | J. I. Case Company | Power shift mechanism for earth working implements |
CA2153954C (en) | 1994-07-16 | 2001-03-13 | Walter Roy Allen | Mechanical excavators |
CA2165708A1 (en) * | 1994-12-21 | 1996-06-22 | Mitsuhiro Kishi | Oil supply mechanism in a deep excavator |
-
2001
- 2001-06-08 IT IT2001BO000365A patent/ITBO20010365A1/en unknown
-
2002
- 2002-05-21 EP EP02076988.1A patent/EP1264938B1/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2559242C2 (en) * | 2009-06-03 | 2015-08-10 | СиЭнЭйч ИТАЛИЯ СПА | Hydraulic actuation of sliding carriage |
Also Published As
Publication number | Publication date |
---|---|
ITBO20010365A0 (en) | 2001-06-08 |
EP1264938A1 (en) | 2002-12-11 |
ITBO20010365A1 (en) | 2002-12-08 |
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