US3798805A - Adjustable scraper blade - Google Patents

Adjustable scraper blade Download PDF

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Publication number
US3798805A
US3798805A US00299992A US29999272A US3798805A US 3798805 A US3798805 A US 3798805A US 00299992 A US00299992 A US 00299992A US 29999272 A US29999272 A US 29999272A US 3798805 A US3798805 A US 3798805A
Authority
US
United States
Prior art keywords
blade
guide
cutting edge
frame
section
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
US00299992A
Other languages
English (en)
Inventor
J Hancock
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.)
Doosan Bobcat North America Inc
Original Assignee
Clark Equipment Co
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 Clark Equipment Co filed Critical Clark Equipment Co
Priority to US00299992A priority Critical patent/US3798805A/en
Priority to ZA737528*A priority patent/ZA737528B/xx
Priority to AU60841/73A priority patent/AU475929B2/en
Priority to GB4828073A priority patent/GB1440260A/en
Priority to DE19732352214 priority patent/DE2352214A1/de
Priority to BR8256/73A priority patent/BR7308256D0/pt
Priority to AR250651A priority patent/AR200413A1/es
Priority to FR7337722A priority patent/FR2203916B3/fr
Priority to JP48119065A priority patent/JPS4973804A/ja
Application granted granted Critical
Publication of US3798805A publication Critical patent/US3798805A/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
    • E02F3/64—Buckets cars, i.e. having scraper bowls
    • E02F3/65—Component parts, e.g. drives, control devices
    • 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
    • E02F3/64—Buckets cars, i.e. having scraper bowls
    • 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
    • E02F3/64—Buckets cars, i.e. having scraper bowls
    • E02F3/6454—Towed (i.e. pulled or pushed) scrapers
    • E02F3/6481—Towed (i.e. pulled or pushed) scrapers with scraper bowls with an ejector having translational movement for dumping the soil
    • 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
    • E02F3/64—Buckets cars, i.e. having scraper bowls
    • E02F3/65—Component parts, e.g. drives, control devices
    • E02F3/654—Scraper bowls and components mounted on them
    • E02F3/658—Cutting edge

Definitions

  • ABSTRACT A blade for earth working machines having a blade frame fixed to the machine and longitudinally, inclined, extensible blade sections which may be extended to increase local penetration of the cutting edge depending on soil condition.
  • the invention pertains to the art of mobile earth working machines and more particularly to selfpropelled elevating tractor scrapers in which the scraper has side walls, bottom and rear walls but will be open at the front defining a bowl for collecting earth material.
  • a blade is inclined downwardly between the side walls at the front and may be lowered into engagement with the ground for digging. It will be appreciated that while the invention is described herein with respect to a tractor scraper blade, other earth moving machines and material handling equipment may utilize a blade of similar type, such as found on bulldozers or tractor shovels, for which the invention will be equally applicable.
  • An adjustable blade having a blade frame.
  • One or more extensible blade sections is mounted on the blade frame.
  • Guide members on the blade frame and extensible section cooperate for guiding the blade section between extended or retracted positions and a locking device is employed to rigidly hold the blade section in one of several of such positions.
  • the guide members may take the form of bars fixed to the underside of the extensible section.
  • a row of lugs project outwardly from the bar adjacent its lower end and a row of holes in the bar adjacent its upper end cooperate with guide blocks on the blade frame to secure the blade section in position.
  • a locking pin is inserted when a hole in a guide block is aligned with a hole in the guide bar.
  • a center section of the blade approximately one-third the full width, will be extensible to form a deep cutting section, while on adjacent sides, the blade will be at normal cutting edge depth; or on either side of the center cutting section extensible chisels may be extended to widen the center cutting section; or with the center section retracted, the chisels may be projected alone to provide ripping teeth all as soil conditions may require. Any number or combination of blade sections may be incorporated depending on blade size and working conditions.
  • One of the main advantages of the invention is the provision of a blade structure providing a plurality of extensible sections which can be independently adjusted to change the cutting edge configuration to suit the particular ground conditions.
  • a further advantage is that the individual blade sections may be rapidly and economically replaced without having to replace an entire cutting blade.
  • the operator may change the blade configuration in the field. That is, upon encountering resistance to blade penetration, the operator may simply extend one or more of the blade sections to increase the penetrating power of the blade without having to carry special tools or return to the garage for the appropriate blade required.
  • FIG. 1 is a side elevational view of a tractor scraper equipped with a scraper blade according to the invention
  • FIG. 2 is a cross-sectional view of the blade
  • FIG. 3 is a plan view of the blade showing only the chisels extended.
  • FIG. 4 is a plan view of the blade similar. to the view in FIG. 3 showing the chisels retracted and the center cutting section extended.
  • FIG. 1 shows a two-wheeled, over-hung tractor 10 towing a two-wheeled scraper 12.
  • the scraper 12 has a pair of arms 13 connected at the forward edges of the scrapers side walls 14. The arms 13 are joined by a cross beam 15 at the front.
  • a yoke 16 is attached to the cross beams and extends forwardly for mounting on the tractor 10 by means of a kingpin coupling 18.
  • a pair of steering jacks 20, one on each side of the yoke 16 is controlled by a steering valve (not shown) operated by the steering wheel 22 on the tractor for effecting turning movements of the tractor relative to the scraper about the vertical steer axis of the kingpin 23.
  • the operator of the tractor 10 steers by turning the tractor relative to the scraper about the steer axis as jacks 20 are extended and retracted on opposite sides of the yoke 16.
  • the tractor is supported on wheels 25 and the scraper on wheels 26.
  • the scraper side walls 14 define an open bowl having an ejection gate 27 at the rear and a rolling door 28 at the bottom which are sequentially operated by hydraulic cylinders 29 sliding the door 28 rearwardly and pushing the end gate 27 forwardly when dumping dirt from the bowl.
  • a scraper blade 30 In front of the rolling door 28 is a scraper blade 30 which is fixed between moldboards 31 on opposite sides of the scraper.
  • An elevator 32 inclines downwardly across the front of the bowl and carries a plurality of chain driven drags or flights 33 which engage the ground in front of the blade 30 to assist in loading dirt into the bowl when the blade is lowered to a cutting position.
  • a pair of lift cylinders 35 one on each side, is attached at its lower end to the moldboard 31 and at the upper end to the cross beam 15. The cylinders 35 are controlled by the operator from the tractor and may be extended to lower the front of the scraper to the ground so that the cutting edge of the blade 30 is brought into engagement with the ground for digging.
  • the scraper blade 30 includes a blade frame 39 secured at its opposite ends between the moldboards 31.
  • the blade frame includes an upper, downwardly inclined, surface 40 on which are positioned a plurality of blade sections 42 arranged in side-by-side relatiohship to form a substantially continuous upper surface 43 which inclines forwardly to a cutting edge 44.
  • each blade section 42 has mounted on the underneath side thereof a bar 45 which bears on the upper surface 40 of the blade frame.
  • Each bar 45 has a row of longitudinally spaced transverse lugs 46 adjacent its lower end projecting outwardly on opposite sides and a row of longitudinally spaced holes 48 adjacent its upper end.
  • transverse guide blocks 50 Fixedly mounted on the upper surface 40 of the blade frame 39 are transverse guide blocks 50 generally in the form of metal angles having gussets 51.
  • the back leg of the angle is welded to the upper surface 40 and the top leg projects forwardly toward the cutting edge 44.
  • Other guide blocks 52 extend longitudinally along opposite edges of the blade sections and overlie the ends of the lugs 46 projecting from the bars 45 (FIGS. 3 and 4).
  • the transverse blocks 50 are eliminated for the narrow blade sections where only one bar 45 is used.
  • upper blocks 53 arranged on opposite sides of the bars 45 and having a hole 54 which may be aligned with one of the holes 48 in the bars 45 for insertion of a locking pin 55.
  • the bottom leg 56 (FIG. 2) of the upper block 53 on one side is notched at 57 and the pin 55 has a right angle end, dotted lines in FIG. 2, that is rotated down into the notch 57 to lock the pin in place.
  • any blade section 42 may be extended to change the cutting edge configuration.
  • To extend the center blade section it is only necessary to release the locking pin 55, move the blade section forward so that the lug 46 clears the overlying leg of the transverse blocks 50 and the longitudinal side blocks 52. Thereafter the blade section may be lifted so that a following lug 46 is put in the place previously occupied by the previous lug and in which position a hole 48 in the bar will be aligned with the hole 54in the upper block allowing reinsertion of the pin 55.
  • the center blade section 42 may be extended to provide a deep cutting section; or as shown in FIG. 3, two narrow blade sections, one on each side of the center section, may be extended for a ripping action; or by extending all of the sections a wider, deep center cutting section is obtained; or by retracting all of the blade sections, a straight full width cutting edge is obtained thus, in effect, providing four blades in one.
  • a blade for earth moving equipment comprising a blade frame fixed to the equipment, a cutting element mounted on the blade frame and inclined forwardly defining a cutting edge which may be lowered to the ground for digging, a plurality of extensible blade sections forming a portion of said cutting element and being extensible to provide a deeper cut than the rest of the cutting edge and a plurality of guide means for guiding the blade sections between the extended and retracted positions, locking means associated with cer tain of said guide means for holding the blade sections in position and wherein said guide means include a bar secured to the back of each blade section, a plurality of longitudinally spaced lugs projecting from each bar adjacent one end, a plurality of longitudinally spaced holes in each bar adjacent its opposite end, guide blocks projecting upwardly from the blade frame adjacent the opposite ends of said bars, one of said guide blocks providing a portion overlying said lugs and the other of said guide blocks having a hole therein adapted to be aligned with a hole in the bar and said locking means including a locking pin
  • a scraper blade for a mobile scraper having a dirt collecting bowl defined by side walls, a floor and an end wall, being opened at the front and a scraper blade mounted between the side walls at the lower front portion thereof and inclined forwardly to a cutting edge adapted to be lowered to the ground for digging, said scraper blade comprising a blade frame secured between the side walls having a forwardly inclined upper surface, a plurality of movable blade sections mounted on the upper surface of the blade frame in side-by-side relationship defining a portion of a substantially continuous upper surface, the forward ends thereof forming a portion of said cutting edge, each of said blade sections having mounted on the back thereof, a longitudinally extending bar, a guide means on the upper surface of said blade frame cooperating with each bar permitting one or more of said blade sections to be slidably adjusted relative to the blade frame so as to provide an extension in said cutting edge, wherein each said bars has a longitudinal row of transverse lugs projecting from the lower end thereof and a row of longitudinally spaced openings formed in the
  • a scraper blade according to claim 2 wherein a wide center section has a plurality of laterally spaced bars, other guide blocks secured to the blade frame intermediate the bars on said center section and extending transversely between said bars having an upper portion extending forwardly toward the cutting edge overlying at opposite ends one of said lugs on each bar and co-operating with said laterally extending portion of the lower guide blocks to prevent lifting of the center blade section and with the upper guide blocks as a longitudinal stop for said center section.
  • a mobile scraper having a dirt collecting bowl, side walls, a floor and an end wall, being open at the front and a scraper blade mounted between the side walls and inclining downwardly to a cutting edge adapted to be lowered to the ground for digging, the improvement comprising a blade frame secured between the side walls adjacent the front lower edge thereof having an upper surface inclining downwardly, a blade mounted on the upper surface of said frame extending forwardly thereof forming said cutting edge, an adjustable center blade section having a width approximately one-third the full width of the blade providing a relatively wide extension of the cutting edge when extended and defining with the remaining portions of the blade in the retracted position a continuous cutting edge said adjustable blade section having a plurality of longitudinally extending laterally spaced guide members secured on the back side thereof and extending rearwardly generally parallel to the upper surface of said frame providing an upper portion spaced to the rear of the blade having free access from above and a lower portion extending beneath the blade adjacent the cutting edge, upper and lower guide means mounted on said blade frame adjacent the upper and lower and
  • the lower guide means includes guide blocks secured to the blade frame being laterally spaced to provide an opening through which said guide members may extend, laterally projecting means on the lower portions of each said guide member, each guide block having a portion overlying said laterally projecting means permitting said blade section to be slidably moved slightly to clear said overlying portions and thereafter lifted free of said blade frame.
  • said upper guide means includes guide blocks spaced so as to permit said guide members to extend therebetween, a plurality of openings spaced in the upper portion of each guide members, an opening in each guide block alignable with one of said openings in the guide members and a pin insertable through said openings for locking the guide members into position.

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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)
  • Soil Working Implements (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Knives (AREA)
US00299992A 1972-10-24 1972-10-24 Adjustable scraper blade Expired - Lifetime US3798805A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US00299992A US3798805A (en) 1972-10-24 1972-10-24 Adjustable scraper blade
ZA737528*A ZA737528B (en) 1972-10-24 1973-09-24 Adjustable scraper blade
AU60841/73A AU475929B2 (en) 1972-10-24 1973-09-28 Adjustable scraper blade
GB4828073A GB1440260A (en) 1972-10-24 1973-10-17 Blade for earth-moving working equipment
DE19732352214 DE2352214A1 (de) 1972-10-24 1973-10-18 Schuerfschneide fuer erdbewegungsgeraete
BR8256/73A BR7308256D0 (pt) 1972-10-24 1973-10-23 Lamina para equipamento de terraplenagem, aperfeicoamento em raspotransportador movel, e lamina raspadora para raspo-transportador movel
AR250651A AR200413A1 (es) 1972-10-24 1973-10-23 Cuchilla para equipos de trabajar la tierra
FR7337722A FR2203916B3 (US20110009641A1-20110113-C00256.png) 1972-10-24 1973-10-23
JP48119065A JPS4973804A (US20110009641A1-20110113-C00256.png) 1972-10-24 1973-10-24

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00299992A US3798805A (en) 1972-10-24 1972-10-24 Adjustable scraper blade

Publications (1)

Publication Number Publication Date
US3798805A true US3798805A (en) 1974-03-26

Family

ID=23157202

Family Applications (1)

Application Number Title Priority Date Filing Date
US00299992A Expired - Lifetime US3798805A (en) 1972-10-24 1972-10-24 Adjustable scraper blade

Country Status (9)

Country Link
US (1) US3798805A (US20110009641A1-20110113-C00256.png)
JP (1) JPS4973804A (US20110009641A1-20110113-C00256.png)
AR (1) AR200413A1 (US20110009641A1-20110113-C00256.png)
AU (1) AU475929B2 (US20110009641A1-20110113-C00256.png)
BR (1) BR7308256D0 (US20110009641A1-20110113-C00256.png)
DE (1) DE2352214A1 (US20110009641A1-20110113-C00256.png)
FR (1) FR2203916B3 (US20110009641A1-20110113-C00256.png)
GB (1) GB1440260A (US20110009641A1-20110113-C00256.png)
ZA (1) ZA737528B (US20110009641A1-20110113-C00256.png)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3994084A (en) * 1975-04-09 1976-11-30 Caterpillar Tractor Co. Adjustable feedthrough router bit for scrapers and the like
US4108250A (en) * 1976-12-27 1978-08-22 Caterpillar Tractor Co. Cutting edge assembly for earthworking devices
US5743032A (en) * 1993-01-22 1998-04-28 Vauhkonen; Pertti Plough blade arrangement
US9528234B1 (en) * 2016-05-24 2016-12-27 Equipement Vtc Mfg Inc Front retracting plow with sliding blade sections
US10385536B2 (en) 2017-11-13 2019-08-20 Caterpillar Paving Products Inc. System and method for controlling movement of moldboard
US10865534B2 (en) 2017-11-07 2020-12-15 1708828 Ontario Limited Snowplow with ground contour following cutting edge and impact absorption
US11124935B2 (en) 2017-11-07 2021-09-21 1708828 Ontario Limited Snowplow with ground contour following cutting edge and impact absorption

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB103025A (en) * 1916-02-24 1917-01-11 Whitakers Engineers Ltd Improvements in or relating to the Digging Tools of Steam Navvy Buckets.
US2160964A (en) * 1938-04-20 1939-06-06 Joseph R Godfrey Adjustable scarifier tooth
US2584868A (en) * 1946-11-26 1952-02-05 Taylor A Guess Grubbing attachment for tractors
US2713217A (en) * 1955-07-19 Subgrading machine
US2778129A (en) * 1951-05-16 1957-01-22 Gen Motors Corp Offset cutting edge for scrapers
US2824392A (en) * 1955-01-07 1958-02-25 Richard B Reinhard Loading bucket cutting edge construction
US2828558A (en) * 1956-01-27 1958-04-01 Richard B Reinhard Earth-moving equipment cutting edge construction
US3011274A (en) * 1958-02-19 1961-12-05 Curtiss Wright Corp Blade construction for carry-type scraper
US3387890A (en) * 1965-08-02 1968-06-11 Louis E. Haynes Earth excavating device

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2713217A (en) * 1955-07-19 Subgrading machine
GB103025A (en) * 1916-02-24 1917-01-11 Whitakers Engineers Ltd Improvements in or relating to the Digging Tools of Steam Navvy Buckets.
US2160964A (en) * 1938-04-20 1939-06-06 Joseph R Godfrey Adjustable scarifier tooth
US2584868A (en) * 1946-11-26 1952-02-05 Taylor A Guess Grubbing attachment for tractors
US2778129A (en) * 1951-05-16 1957-01-22 Gen Motors Corp Offset cutting edge for scrapers
US2824392A (en) * 1955-01-07 1958-02-25 Richard B Reinhard Loading bucket cutting edge construction
US2828558A (en) * 1956-01-27 1958-04-01 Richard B Reinhard Earth-moving equipment cutting edge construction
US3011274A (en) * 1958-02-19 1961-12-05 Curtiss Wright Corp Blade construction for carry-type scraper
US3387890A (en) * 1965-08-02 1968-06-11 Louis E. Haynes Earth excavating device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3994084A (en) * 1975-04-09 1976-11-30 Caterpillar Tractor Co. Adjustable feedthrough router bit for scrapers and the like
US4108250A (en) * 1976-12-27 1978-08-22 Caterpillar Tractor Co. Cutting edge assembly for earthworking devices
US5743032A (en) * 1993-01-22 1998-04-28 Vauhkonen; Pertti Plough blade arrangement
US9528234B1 (en) * 2016-05-24 2016-12-27 Equipement Vtc Mfg Inc Front retracting plow with sliding blade sections
US10865534B2 (en) 2017-11-07 2020-12-15 1708828 Ontario Limited Snowplow with ground contour following cutting edge and impact absorption
US11124935B2 (en) 2017-11-07 2021-09-21 1708828 Ontario Limited Snowplow with ground contour following cutting edge and impact absorption
US10385536B2 (en) 2017-11-13 2019-08-20 Caterpillar Paving Products Inc. System and method for controlling movement of moldboard

Also Published As

Publication number Publication date
FR2203916B3 (US20110009641A1-20110113-C00256.png) 1976-09-17
GB1440260A (en) 1976-06-23
JPS4973804A (US20110009641A1-20110113-C00256.png) 1974-07-17
ZA737528B (en) 1974-08-28
BR7308256D0 (pt) 1974-07-25
AU6084173A (en) 1975-04-10
AU475929B2 (en) 1976-09-09
FR2203916A1 (US20110009641A1-20110113-C00256.png) 1974-05-17
DE2352214A1 (de) 1974-05-02
AR200413A1 (es) 1974-11-08

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