US3909963A - Back-acting shovel with cooperating shield - Google Patents

Back-acting shovel with cooperating shield Download PDF

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Publication number
US3909963A
US3909963A US483675A US48367574A US3909963A US 3909963 A US3909963 A US 3909963A US 483675 A US483675 A US 483675A US 48367574 A US48367574 A US 48367574A US 3909963 A US3909963 A US 3909963A
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US
United States
Prior art keywords
chassis
turret
shield
blade
appliance
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
Application number
US483675A
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English (en)
Inventor
Jean E Patel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Poclain SA
Original Assignee
Poclain SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Poclain SA filed Critical Poclain SA
Application granted granted Critical
Publication of US3909963A publication Critical patent/US3909963A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E02F3/30—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 with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • E02F3/32—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 with a dipper-arm pivoted on a cantilever beam, i.e. boom working downwardly and towards the machine, e.g. with backhoes
    • 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
    • E02F3/30—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 with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • 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
    • E02F3/96—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
    • E02F3/963—Arrangements on backhoes for alternate use of different tools
    • E02F3/964—Arrangements on backhoes for alternate use of different tools of several tools mounted on one machine
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S414/00—Material or article handling
    • Y10S414/125—Combined or convertible implements

Definitions

  • An earth moving appliance comprises a chassis which may be moved along the ground and which has a turret mounted for rotation about an axis thereon.
  • a jib is pivotally mounted on the turret and carries a working tool such as a bucket.
  • a shield which may be a blade or skirt, is connected to the chassis, and is movable relative thereto between. a first position in which the shield bears against the ground and is disposed between the working tool and the chassis and the second position in which the shield is raised from the ground.
  • an earth moving appliance comprising: a chassis, means for moving the chassis; a turret mounted for rotation on the chassis about an axis; a jib pivotally mounted on the said turret and carrying a working tool, each of the positions which the turret can assume relative to the chassis defining a working direction of the working tool, and shield means connected to the chassis and movable relative thereto between a first position in which the shield means bears against the ground and is disposed between the working tool and the chassis, and a second position in which the shield means is raised from the ground, the shield means being curved and having a centre of curvature which is substantially on the axis of rotation of the turret, the radius of curvature of the shield means being such that contact between the shield means and the turret on rotation of the latter is avoided, the shield means, when in the first position, presenting a stop surface to the working tool at least in a number of said working directions thereof.
  • the vertical height of the shield means is greater than the minimum distance between the ground and the turret.
  • the shield means is a blade arcuate in plan and subtending a predetermined angle to the axis of rotation of the turret, the blade having a substantially part-frusto conical portion and/or a substantially part cylindrical portion and being supported from the chassis by a pair of arms, lifting means being connected to the blade to move it between said positions.
  • the lifting means may comprise or include at least one hydraulic jack operatively connected between the chassis and the blade. Additionally, or alternatively the lifting means may comprise or include a removable connector extending between the blade and the jib.
  • support means being such that the skirt remains substantially coaxial with the axis of rotation of the turret at all times.
  • FIG. 1 is a side elevational view of one embodiment of an earth moving appliance according to the present invention
  • FIG. 2 is a top plan view of the appliance of FIG. 1,
  • FIG. 4 is a top plan view of the appliance of FIG. 3, and t FIG. 5 is a view of the appliance of FIG. 4 looking in the direction of the arrow F.
  • FIGS. 1 and 2 there is illustrated one embodiment of an earth moving appliance according to the present invention.
  • the appliance has a chassis 1 having caterpillar tracks 2.
  • a turret 3 is mounted on the chassis 1 for pivotal movement about an axis 4.
  • a jib 5 is pivotally mounted by one end on the turret 3 and, at its other end, is connected to a rocking lever 5a carrying a bucket 6 of the back-acting type.
  • An arcuate shield or blade 7 is mounted from the rear (as seen in FIG. 1) of the chassis via a pair of carrier arms 8 for pivotal movement about an axis 8a. Reinforcement members 9, one at each end of the blade 7, strengthens the latters connection to the arms 8.
  • the blade 7 is shown in solid lines in FIG.
  • the blade 7 has a centre of curvature which is located substantially on the axis 4 at which the blade subtends an angle A.
  • the blade: 20 has a lower portion which contacts the ground and which is a sector of a frusto-cone and an upper sector of a cylinder. It will be appreciated that the blade may consist merely of either a substantially part frusto-conical portion or a substantially part-cylindrical portion.
  • the blade is at all times facing the working directionof the bucket 6, which direction is indicated by the arrow T, the jib 5 being within the angle A defined by the blade at the axis 4.
  • a raised position of the jib 5 and the blade 7 is shown in dot-dash lines in FIG. 1.
  • the jib 5 is maintained in this raised position by a removable connector 10 connected between the blade 7 and. the jib 5.
  • the blade 7 is also raised byvirtue of the connector 10.
  • the connector 10 is only connected between the blade 7 and the jib 5 when the appliance is to be moved and is removed when the appliance is operational.
  • Hydraulic jacks 50, 51 operatively connected between the chassis l and the arms 8, may either alone or in cooperation with the connector 10, cause the blade to be raised from the ground.
  • the raised position of the jib defines the useful lifting height of the appliance. It will be noted from FIG. 1
  • the blade 7 constitutes, in fact, a stop for material collected from a heap 11 by the bucket 6.
  • the blade 7 frustrates this tendency and at the same time permits better loading of material into the bucket.
  • the shape of the blade which is arcuate so that it can always be substantially perpendicular to the working direction of the bucket, and which is relatively high so that a minimum volume of material can pass over it, substantially improves the performance of the appliance.
  • the vertical height H of the blade when it is in contact with the ground, is, as will be seen from FIG. 1, greater than the minimum h between the turret 3 and the ground.
  • FIGS. 3 there is shown another embodiment of an earth moving appliance according to the present invention.
  • the parts of this embodiment similar to the parts of the appliance shown in FIGS. 1 and 2 have been designated by the same reference numerals and will not be described further in detail.
  • the blade 7 of this appliance of FIGS. 1 and 2 is replaced by a shield or skirt 18 which completely encircles the chassis l.
  • the skirt 18 is connected to the chassis l by a triangular member 19, a base 20 of which is pivotally mounted at 21, 22 on the chassis adjacent one of the caterpillar tracks 2, and an apex of which is articulated by means of a ball joint 23 on the inside face of the skirt 18.
  • a bar 24 extends between the the skirt 18 and the chassis 1 adjacent the other caterpillar track 2, the bar 24 being articulated to the skirt 18 and the chassis l by balljoints 25, 26 respectively.
  • FIG. 5 which is a view in the direction of the arrow F in FIG. 4, with the front part of the skirt 18 removed, it can be seen that the triangular member 19 and the bar 24 are in a substantially horizontal plane adjacent the ground if the skirt is in contact therewith.
  • a plurality of jacks 27 are connected by means of ball joints 28 between the skirt l8 and the chassis 1 adjacent the upper portion of the caterpillar tracks 2.
  • these jacks are inclined to the horizontal when the skirt is in contact with the ground.
  • the triangular member 19 and the bar 24 maintains the skirt 18 substantially coaxial with the axis 4 of the turret at all times.
  • the skirt 18 When the jacks 27 are retracted and locked in a retracted position, the. skirt 18 is maintained at a given distance from the ground, and the appliance can thus be moved. When the jacks are extended and locked in an extended position the skirt 18 is urged into contact with the ground to an extent that it can account of irregularities of the surface thereof. When the jacks 27 are locked in either the retracted position or the extended position, the skirt 18 is, in effect, an integral part of the chassis l.
  • the advantage of the shield 18 is that the bucket can be used in conjunction with the skirt in any position of the turret whereas with the appliance shown in FIGS. 1 and 2, the bucket can only be used in conjunction with the blade 7 within a limited angular range a of working positions of the turret 4.
  • the skirt constitutes a barrier" inside which the turret 3 can rotate without risk of accident.
  • the bucket of the above described appliances, and especially the appliance of FIGS. 1 and 2 may, if de-' sired, be replaced with another form of working tool, such as, for example, a scraper blade for the purpose of cleaning a surface on which repair or excavation work has been carried out.
  • another form of working tool such as, for example, a scraper blade for the purpose of cleaning a surface on which repair or excavation work has been carried out.
  • An earth moving appliance comprising: a chassis; means for moving the chassis; a turret mounted for rotation on the chassis about an axis; a jib pivotally mounted on the said turret and carrying a working tool, each of the positions which the turret can assume relative to the chassis defining a working direction of the working tool; and shield means connected to the chassis and movable relative thereto between a first position in which the shield means bears against the ground and is-disposed between the working tool and the chassis, and a second position in which the shield means is raised from the ground, the shield means being curved and having a centre of curvature which is substantially on the axis of rotation of the turret, the radius of curvature of the shield means being such that contact between the shield means and the turret on rotation of the latter is avoided, the shield means, when in the first position, presenting a stop surface to the working tool at least in a number of said working directions thereof.
  • the shield means is a blade arcuate in plan and subtending a predetermined angle to the axis of rotation of the turret, the blade having a substantially part-frusto conical portion and a substantially part-cylindrical portion and being supported from the chassis by a pair of arms, lifting means being connected to the blade to move it be tween said positions.
  • the 'shield means comprises a skirt which is arcuate in plan and surrounds the chassis, a plurality of jacks being operatively connected between the skirt and the chassis to move the skirt between said positions, support means being articulated to and extending between the skirt and the chassis, the support means being such that the skirt remains substantially coaxial with the axis of rotation of the turret at all times.

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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)
  • Component Parts Of Construction Machinery (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Earth Drilling (AREA)
US483675A 1973-06-28 1974-06-27 Back-acting shovel with cooperating shield Expired - Lifetime US3909963A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7323786A FR2235232B1 (enrdf_load_stackoverflow) 1973-06-28 1973-06-28

Publications (1)

Publication Number Publication Date
US3909963A true US3909963A (en) 1975-10-07

Family

ID=9121739

Family Applications (1)

Application Number Title Priority Date Filing Date
US483675A Expired - Lifetime US3909963A (en) 1973-06-28 1974-06-27 Back-acting shovel with cooperating shield

Country Status (10)

Country Link
US (1) US3909963A (enrdf_load_stackoverflow)
JP (1) JPS5037204A (enrdf_load_stackoverflow)
AR (1) AR204246A1 (enrdf_load_stackoverflow)
BE (1) BE816202A (enrdf_load_stackoverflow)
BR (1) BR7405058A (enrdf_load_stackoverflow)
DE (1) DE2429659C2 (enrdf_load_stackoverflow)
ES (1) ES427661A1 (enrdf_load_stackoverflow)
FR (1) FR2235232B1 (enrdf_load_stackoverflow)
GB (1) GB1443257A (enrdf_load_stackoverflow)
IT (1) IT1015410B (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4295560A (en) * 1978-10-10 1981-10-20 Billy J. Cross Material handling apparatus
US4464852A (en) * 1983-07-07 1984-08-14 Deere & Company Dozer attachment for excavator
US6074153A (en) * 1997-08-25 2000-06-13 Allen; Jean-Luc Drill rods feeding device
US6668471B1 (en) * 2000-09-01 2003-12-30 Excavation Technology Corporation Towable earth digging apparatus
CN104612092A (zh) * 2015-01-16 2015-05-13 中国农业大学 公路泥石流快速清障车
CN112030851A (zh) * 2020-08-10 2020-12-04 湖州前锋机械配件厂 一种连续挖掘的公路机械用泥石流清障装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2502681A (en) * 1945-03-17 1950-04-04 Unit Crane & Shovel Corp Material handling apparatus
US2660816A (en) * 1949-02-17 1953-12-01 Willard A Maxwell Combination bulldozer and shovel arrangement
US2718312A (en) * 1951-06-23 1955-09-20 John S Pilch Material handling apparatus
US3466770A (en) * 1966-09-16 1969-09-16 Frank W Morrison Self-propelled earth excavating and leveling apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1450809A (fr) * 1965-07-15 1966-06-24 Poclain Sa équipement de pelle pour travail de raclage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2502681A (en) * 1945-03-17 1950-04-04 Unit Crane & Shovel Corp Material handling apparatus
US2660816A (en) * 1949-02-17 1953-12-01 Willard A Maxwell Combination bulldozer and shovel arrangement
US2718312A (en) * 1951-06-23 1955-09-20 John S Pilch Material handling apparatus
US3466770A (en) * 1966-09-16 1969-09-16 Frank W Morrison Self-propelled earth excavating and leveling apparatus

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4295560A (en) * 1978-10-10 1981-10-20 Billy J. Cross Material handling apparatus
US4464852A (en) * 1983-07-07 1984-08-14 Deere & Company Dozer attachment for excavator
US6074153A (en) * 1997-08-25 2000-06-13 Allen; Jean-Luc Drill rods feeding device
US6668471B1 (en) * 2000-09-01 2003-12-30 Excavation Technology Corporation Towable earth digging apparatus
CN104612092A (zh) * 2015-01-16 2015-05-13 中国农业大学 公路泥石流快速清障车
CN112030851A (zh) * 2020-08-10 2020-12-04 湖州前锋机械配件厂 一种连续挖掘的公路机械用泥石流清障装置

Also Published As

Publication number Publication date
IT1015410B (it) 1977-05-10
JPS5037204A (enrdf_load_stackoverflow) 1975-04-07
FR2235232A1 (enrdf_load_stackoverflow) 1975-01-24
DE2429659C2 (de) 1983-08-18
FR2235232B1 (enrdf_load_stackoverflow) 1976-06-18
GB1443257A (en) 1976-07-21
DE2429659A1 (de) 1975-01-16
BR7405058A (pt) 1976-02-17
AR204246A1 (es) 1975-12-10
BE816202A (fr) 1974-09-30
ES427661A1 (es) 1976-09-01

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