EP1452650B1 - Revolving blade and mounting for small excavators - Google Patents
Revolving blade and mounting for small excavators Download PDFInfo
- Publication number
- EP1452650B1 EP1452650B1 EP03425125A EP03425125A EP1452650B1 EP 1452650 B1 EP1452650 B1 EP 1452650B1 EP 03425125 A EP03425125 A EP 03425125A EP 03425125 A EP03425125 A EP 03425125A EP 1452650 B1 EP1452650 B1 EP 1452650B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blade
- holes
- support frame
- revolving
- side members
- 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
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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
- E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
- E02F3/80—Component parts
- E02F3/815—Blades; Levelling or scarifying tools
- E02F3/8152—Attachments therefor, e.g. wear resisting parts, cutting edges
-
- 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
- E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
- E02F3/7609—Scraper blade mounted forwardly of the tractor on a pair of pivoting arms which are linked to the sides of the tractor, e.g. bulldozers
- E02F3/7613—Scraper blade mounted forwardly of the tractor on a pair of pivoting arms which are linked to the sides of the tractor, e.g. bulldozers with the scraper blade adjustable relative to the pivoting arms about a vertical axis, e.g. angle dozers
Definitions
- the present invention relates to the combination of a revolving blade and a mounting for excavators - self-moving machines with wheels, tracks or articulated supports, provided with an upper structure or turret, normally apt to rotate by 360° and supporting an excavating boom, and mainly designed to excavate with a shovel or a bucket, while remaining stationary - and concerns, more particularly, a revolving blade and mounting for compact or small excavators (excavators with an operative mass below 6,000 Kg) according to the preamble of claim 1.
- a revolving blade and mounting combination is known from US 4 081 092.
- scraper front stabilizing blade
- the functions carried out by the scraper are essentially two: the first (and most important) is to provide for a stabilizing action for the small excavator during excavation or load lifting (so as to avoid the problems deriving from its reduced size and reduced weight), the second function is its use in refilling and resetting actions by operating a double-acting cylinder.
- the high limit of conventional scrapers in small excavators is to have a fixed profile; thus, when having to close an excavation, the operator is forced to perform various maneuvers with the bottom car of the machine to successfully complete the operation, or else - when the excavation sites are close to roads - he is forced to close the excavation with the bucket, unless wishing to occupy the entire lane with the machine.
- the object of the present invention is to overcome or at least reduce such drawbacks in small excavators, while maintaining the characteristics of slenderness, maneuverability and simplicity typical of these machines, without making the construction more difficult and/or increasing the costs in a significant way.
- This purpose is achieved by equipping small excavators with the combination of a revolving blade of and mounting according to claim 1, simple structure and easy to maneuver, which forms the object of the present invention.
- the combination of a revolving blade and mounting comprises a support frame and a blade unit, wherein the support frame consists of two side members and at least one cross member; in that the blade unit with the actual blade comprises a U-shaped support, on each of the arms of which a plurality of holes are formed, distributed along a circle arc, two similar holes being formed at the outer ends of the side members of the support frame; and in that the blade unit is apt to be connected to the support frame in a plurality of differently oriented positions, by inserting a couple of pins in said two holes of the frame side members and in holes of said U-shaped support, brought in alignment with the first ones; wherein the center of each circle are corresponds to the hole of the opposite arm closest to the blade.
- said holes in the side members of the support frame are formed in correspondence of said cross member.
- Figs. 1 and 2 are a side view and a top view of a small excavator equipped with a conventional fixed blade or scraper;
- Fig. 3 is a general perspective view of the revolving blade and mounting according to the present invention.
- Figs. 4 and 5 are, respectively, a top view and a side view, on a larger scale, of the revolving blade and mounting shown in fig. 3;
- Figs. 6 and 7 are two perspective views, a front view and respectively a rear view, with disassembled parts, of the revolving blade and mounting according to the invention shown in Figs. 3 to 5;
- Figs. 8 and 9 are a side view and a top view of a small excavator equipped with the revolving blade and mounting of Figs. 3 to 7, oriented with an inclination towards the right side of the machine;
- Fig. 10 is a top view, similar to that of Fig. 8, of a small excavator equipped with the revolving blade and mounting of Figs. 3 to 7, in which the blade is shown not inclined and with the extensions mounted on the inside.
- the small excavators of prior art provided with a turret T rotatably mounted on a bottom car S with tracks C, are equipped - as well as with an excavating boom BE ending with a bucket B, carried by the turret T - with a fixed blade or scraper R carried on the front of the bottom car S.
- the revolving blade and mounting L comprises a support frame 1, with two side members 2 and at least one cross member 3, and a blade unit 4, with an actual blade 5 and a U-shaped support 6 for said blade.
- the support frame 1 comprises, at the free ends of the side members 2, ears 2A for hingeing onto the bottom car S of the small excavator and usually includes a second cross member 3A for connection to a cylinder-piston unit of the small excavator, which controls the vertical movement of the frame itself and thus of the revolving blade L.
- the four arms 7 of the U-shaped support 6 each have three holes 8, formed along circle arcs whose center (Fig. 4) corresponds to the outermost hole 8 closer to the blade 5 of the opposite arm 7, while two holes 9 (Figs. 5 and 6) are provided at the outer ends of the side members 2 of the frame 1, where they connect to the cross member 3.
- Stout pins 10, equipped with comfortable gripping and operating handles 11, allow to connect the blade 5 to the frame 1 in different positions (see Fig. 4), after having aligned each hole 9 of the side members 2 with a pair - selected according to the orientation one wishes to give to the revolving blade L - of holes 8 of the arms 7 of the support 6, by inserting therein the pins 10.
- These pins 10 have the double function of fulcrum for the rotation to orient and block the support 6 in an angular position, or in a normal position.
- the revolving blade L according to the invention is completed by providing two extensions 12, apt to be mounted on both sides of said blade (or both on the same side, one next to the other), to allow the track of the small excavator, when the blade L is mounted, to keep away from the trench (and thus in safe working conditions) during the reclosing step.
- the two extensions 12, when not used, can be housed within the side-play of the central blade, as shown in Figure 10.
- the revolving blade L according to the present invention can be very easily oriented both towards the right and towards the left. To orient the blade towards the right (see Figs. 8 and 9) it is sufficient - starting from the normal, straight position of Fig. 4 - to remove the left pin 10, to rotate the blade in respect of the right pin 10 (left in its place) and to reset the left pin 10 in the wanted position. To orient the blade towards the left (not shown) one proceeds as above, but inverting the pins.
- the particular configuration of the revolving blade according to the present invention and its operating principle allow to maintain the same forward projection of the blade profile, without having to use a particularly large blade which would thus limit the excavating potential.
- the stabilizing function of the revolving blade according to the present invention remains unvaried in respect of the function of a conventional fixed blade since, with the blade in a lowered position, the rotation of the front blade unit occurs around pins perpendicular to the ground, allowing the lower profile of the blade to remain parallel to the soil, by resting on its entire length and thus ensuring steadiness.
- the revolving blade and mounting according to the present invention introduces, in respect of prior art, the considerable advantage of allowing small excavators to refill trenches, or to level soils and roadbeds, or to remove snow or debris from streets and squares, through the normal rectilinear translation of the excavator (i.e. without being forced to perform continuous back and forth maneuvers, as it happened up-to-date with these machines, making use of a conventional fixed blade).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Earth Drilling (AREA)
- Road Repair (AREA)
- Operation Control Of Excavators (AREA)
- Shovels (AREA)
Abstract
Description
- The present invention relates to the combination of a revolving blade and a mounting for excavators - self-moving machines with wheels, tracks or articulated supports, provided with an upper structure or turret, normally apt to rotate by 360° and supporting an excavating boom, and mainly designed to excavate with a shovel or a bucket, while remaining stationary - and concerns, more particularly, a revolving blade and mounting for compact or small excavators (excavators with an operative mass below 6,000 Kg) according to the preamble of
claim 1. Such a revolving blade and mounting combination is known from US 4 081 092. - It is known that, at present, almost all the small excavators are provided with a front stabilizing blade (known as "scraper") of the fixed type, with the blade profile perpendicular to the forward moving direction. The functions carried out by the scraper are essentially two: the first (and most important) is to provide for a stabilizing action for the small excavator during excavation or load lifting (so as to avoid the problems deriving from its reduced size and reduced weight), the second function is its use in refilling and resetting actions by operating a double-acting cylinder.
- When performing refilling operations, the high limit of conventional scrapers in small excavators is to have a fixed profile; thus, when having to close an excavation, the operator is forced to perform various maneuvers with the bottom car of the machine to successfully complete the operation, or else - when the excavation sites are close to roads - he is forced to close the excavation with the bucket, unless wishing to occupy the entire lane with the machine.
- In other cases, the scraper can rotate, as shown in US 4,081,092, but it appears increasing the overall dimensions of the excavator.
- The object of the present invention is to overcome or at least reduce such drawbacks in small excavators, while maintaining the characteristics of slenderness, maneuverability and simplicity typical of these machines, without making the construction more difficult and/or increasing the costs in a significant way.
- This purpose is achieved by equipping small excavators with the combination of a revolving blade of and mounting according to
claim 1, simple structure and easy to maneuver, which forms the object of the present invention. - The combination of a revolving blade and mounting according to the present invention comprises a support frame and a blade unit, wherein the support frame consists of two side members and at least one cross member; in that the blade unit with the actual blade comprises a U-shaped support, on each of the arms of which a plurality of holes are formed, distributed along a circle arc, two similar holes being formed at the outer ends of the side members of the support frame; and in that the blade unit is apt to be connected to the support frame in a plurality of differently oriented positions, by inserting a couple of pins in said two holes of the frame side members and in holes of said U-shaped support, brought in alignment with the first ones; wherein the center of each circle are corresponds to the hole of the opposite arm closest to the blade.
- Preferably, said holes in the side members of the support frame are formed in correspondence of said cross member.
- To said blade there are advantageously associated two extensions, to be mounted in correspondence of the blade in a working position, and behind the actual blade in a rest position.
- A preferred embodiment of the revolving blade and mounting for small excavators according to the present invention will now be described in further detail, by way of example, with reference to the accompanying drawings, in which:
- Figs. 1 and 2 are a side view and a top view of a small excavator equipped with a conventional fixed blade or scraper;
- Fig. 3 is a general perspective view of the revolving blade and mounting according to the present invention;
- Figs. 4 and 5 are, respectively, a top view and a side view, on a larger scale, of the revolving blade and mounting shown in fig. 3;
- Figs. 6 and 7 are two perspective views, a front view and respectively a rear view, with disassembled parts, of the revolving blade and mounting according to the invention shown in Figs. 3 to 5;
- Figs. 8 and 9 are a side view and a top view of a small excavator equipped with the revolving blade and mounting of Figs. 3 to 7, oriented with an inclination towards the right side of the machine; and
- Fig. 10 is a top view, similar to that of Fig. 8, of a small excavator equipped with the revolving blade and mounting of Figs. 3 to 7, in which the blade is shown not inclined and with the extensions mounted on the inside.
- As can be seen from Figs. 1 and 2, the small excavators of prior art, provided with a turret T rotatably mounted on a bottom car S with tracks C, are equipped - as well as with an excavating boom BE ending with a bucket B, carried by the turret T - with a fixed blade or scraper R carried on the front of the bottom car S.
- According to the invention, it is now provided to equip small excavators of the type shown in Figs. 1 and 2, with a revolving blade and mounting as shown in Figs. 3 to 7, to provide several advantages.
- As shown in Figs. 3 to 7, the revolving blade and mounting L according to the invention comprises a
support frame 1, with twoside members 2 and at least onecross member 3, and ablade unit 4, with anactual blade 5 and aU-shaped support 6 for said blade. - The
support frame 1 comprises, at the free ends of theside members 2,ears 2A for hingeing onto the bottom car S of the small excavator and usually includes asecond cross member 3A for connection to a cylinder-piston unit of the small excavator, which controls the vertical movement of the frame itself and thus of the revolving blade L. - The four
arms 7 of the U-shapedsupport 6 each have threeholes 8, formed along circle arcs whose center (Fig. 4) corresponds to theoutermost hole 8 closer to theblade 5 of theopposite arm 7, while two holes 9 (Figs. 5 and 6) are provided at the outer ends of theside members 2 of theframe 1, where they connect to thecross member 3. Stoutpins 10, equipped with comfortable gripping andoperating handles 11, allow to connect theblade 5 to theframe 1 in different positions (see Fig. 4), after having aligned each hole 9 of theside members 2 with a pair - selected according to the orientation one wishes to give to the revolving blade L - ofholes 8 of thearms 7 of thesupport 6, by inserting therein thepins 10. Thesepins 10 have the double function of fulcrum for the rotation to orient and block thesupport 6 in an angular position, or in a normal position. - The revolving blade L according to the invention is completed by providing two
extensions 12, apt to be mounted on both sides of said blade (or both on the same side, one next to the other), to allow the track of the small excavator, when the blade L is mounted, to keep away from the trench (and thus in safe working conditions) during the reclosing step. The twoextensions 12, when not used, can be housed within the side-play of the central blade, as shown in Figure 10. - The revolving blade L according to the present invention can be very easily oriented both towards the right and towards the left. To orient the blade towards the right (see Figs. 8 and 9) it is sufficient - starting from the normal, straight position of Fig. 4 - to remove the
left pin 10, to rotate the blade in respect of the right pin 10 (left in its place) and to reset theleft pin 10 in the wanted position. To orient the blade towards the left (not shown) one proceeds as above, but inverting the pins. - The particular configuration of the revolving blade according to the present invention and its operating principle (with only two pins having the double function of orienting fulcrum and of locking fulcrum) allow to maintain the same forward projection of the blade profile, without having to use a particularly large blade which would thus limit the excavating potential.
- The stabilizing function of the revolving blade according to the present invention remains unvaried in respect of the function of a conventional fixed blade since, with the blade in a lowered position, the rotation of the front blade unit occurs around pins perpendicular to the ground, allowing the lower profile of the blade to remain parallel to the soil, by resting on its entire length and thus ensuring steadiness.
- Besides, the revolving blade and mounting according to the present invention introduces, in respect of prior art, the considerable advantage of allowing small excavators to refill trenches, or to level soils and roadbeds, or to remove snow or debris from streets and squares, through the normal rectilinear translation of the excavator (i.e. without being forced to perform continuous back and forth maneuvers, as it happened up-to-date with these machines, making use of a conventional fixed blade).
- It is understood that other embodiments of the revolving blade and mounting for small excavators, differing from that described heretofore by way of example, can be conceived without departing from the scope of the claims of the present invention.
- It is finally evident that the combination of a revolving blade and mounting according to the present invention, although it was conceived to equip small excavators and is actually apt to provide its best performances in association therewith - as just seen - can always be associated, with similar advantages even if less considerable, also to excavators which are heavier and larger than the compact ones.
Claims (5)
- The combination of a revolving blade and a mounting for compact excavators (or miniexcavators), comprising a support frame (1) and a blade unit (4), wherein the support frame (1) consists of two side members (2) and at least one cross member (3); the blade unit (4) with the actual blade (5) comprises a U-shaped support (6), on each of the arms (7) of which a plurality of holes (8) are formed, distributed along a circle arc, two similar holes (9) being formed at the outer ends of the side members (2) of the support frame (1); and the blade unit (4) is apt to be connected to the support frame (1) in a plurality of differently oriented positions by inserting a couple of pins (10) in said two holes (9) of the side members (2) of the frame (1) and in holes (8) of said U-shaped support (6) brought in alignment with the first ones, characterized in that the center of each of said circle arcs corresponds to the hole (8) of the opposite arm (7) closest to the blade (5).
- The combination of a revolving blade and a mounting according to Claim 1), wherein said holes (9) in the side members (2) of the support frame (1) are formed in correspondence of said cross member (3);
- The combination of a revolving blade and a mounting according to Claims 1) and 2), wherein said plurality of holes (8) formed on the arms (7) of the support frame (1) comprises three holes;
- The combination of a revolving blade and a mounting according to Claims 1) to 3), wherein two extensions (12) are associated thereto;
- The combination of a revolving blade and a mounting according to Claim 4), wherein said extensions (12) can be associated to one and/or the other end of the blade (5) in a working position, and behind the actual blade (5) in a rest position.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT03425125T ATE338171T1 (en) | 2003-02-27 | 2003-02-27 | ROTATING BLADE AND SUSPENSION FOR MINI EXCAVATORS |
DE60307977T DE60307977D1 (en) | 2003-02-27 | 2003-02-27 | Rotatable dozer blade and suspension for mini excavators |
EP03425125A EP1452650B1 (en) | 2003-02-27 | 2003-02-27 | Revolving blade and mounting for small excavators |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03425125A EP1452650B1 (en) | 2003-02-27 | 2003-02-27 | Revolving blade and mounting for small excavators |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1452650A1 EP1452650A1 (en) | 2004-09-01 |
EP1452650B1 true EP1452650B1 (en) | 2006-08-30 |
Family
ID=32749051
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03425125A Expired - Lifetime EP1452650B1 (en) | 2003-02-27 | 2003-02-27 | Revolving blade and mounting for small excavators |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1452650B1 (en) |
AT (1) | ATE338171T1 (en) |
DE (1) | DE60307977D1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8024875B2 (en) * | 2005-12-02 | 2011-09-27 | Clark Equipment Company | Compact excavator implement interface |
DE202014102267U1 (en) | 2014-05-14 | 2014-06-06 | Buchen Umweltservice Gmbh | MHM rotary motor |
JP6908566B2 (en) * | 2018-08-29 | 2021-07-28 | 株式会社日立建機ティエラ | Soil removal equipment for construction machinery |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2629946A (en) * | 1947-06-06 | 1953-03-03 | Mitchell H Ewers | Grading or dozing device |
US4081092A (en) * | 1975-10-17 | 1978-03-28 | Zimmerman Emil F | Tractor with lifting mechanism for mounting a bulldozer blade or the like |
US4479312A (en) * | 1983-04-11 | 1984-10-30 | Valley Engineering, Inc. | Foldable snow compactor with side wings pivotable behind central blade |
JPH07189286A (en) * | 1993-12-28 | 1995-07-28 | Kubota Corp | Dozer device |
JP2771121B2 (en) * | 1994-08-05 | 1998-07-02 | 川崎重工業株式会社 | Snow removal equipment |
WO1999050509A1 (en) * | 1998-03-30 | 1999-10-07 | Shin Caterpillar Mitsubishi Ltd. | Hydraulic shovel |
-
2003
- 2003-02-27 EP EP03425125A patent/EP1452650B1/en not_active Expired - Lifetime
- 2003-02-27 DE DE60307977T patent/DE60307977D1/en not_active Expired - Lifetime
- 2003-02-27 AT AT03425125T patent/ATE338171T1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
EP1452650A1 (en) | 2004-09-01 |
DE60307977D1 (en) | 2006-10-12 |
ATE338171T1 (en) | 2006-09-15 |
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