US3749182A - Angle and tilt mechanism for bulldozer - Google Patents
Angle and tilt mechanism for bulldozer Download PDFInfo
- Publication number
- US3749182A US3749182A US00241949A US3749182DA US3749182A US 3749182 A US3749182 A US 3749182A US 00241949 A US00241949 A US 00241949A US 3749182D A US3749182D A US 3749182DA US 3749182 A US3749182 A US 3749182A
- Authority
- US
- United States
- Prior art keywords
- blade
- pivotally connected
- frame
- braces
- pair
- 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
- 230000007246 mechanism Effects 0.000 title claims abstract description 45
- 230000033001 locomotion Effects 0.000 claims abstract description 11
- 239000012530 fluid Substances 0.000 claims description 16
- 238000010276 construction Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 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
- E02F3/76—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
- ABSTRACT A bulldozer blade is mounted on the central front part of a C-frame so as to permit angling about a generally vertical axis by adjusting the position of the connecting points of braces and struts extending between the rear of the dozer blade and the legs of the C-t'rame.
- the dozer blade is tilted aboout a generally longitudinal axis by changing the length of extensible struts connected between the bottom rear of the dozer blade and the C- frame legs.
- the upper rear portion of the blade is interconnected to the C-frame by a link which serves to compensate for predetermined motion occuring between the dozer blade and the C-frame as dozer blade is tilted.
- a blade angling mechanism includes a pair of hydraulic jacks disposed telesopically within a pair of cylindrical members which are guided on longitudinal tracks on the legs of the C-frame to avoid side loading of the hydraulic jacks.
- the present invention not only provides a novel angle and tilt dozer construction in the manner of mounting the hydraulic cylinders for angling the blade but also compensates for the stress producing motion created on tilting the dozer blade. This is achieved by locating the pivot connection between the dozer and C-frame at the lower central rear of the dozer blade and by making the connection between the upper transverse ends of the dozer blade and the C-frame fixed links, and by making the lower links between the lower transverse ends of the dozer blade and the C-frame extensible links. Additionally when employing hydraulically actuated jacks to angle the blade, the present invention provides a longitudinal swing link between the upper rear central part of the blade and the front of the C-frame. This provides stability for mounting the blade and allows the top of the dozer to adjust its fore and aft position relative to the C-frame as the dozer is tilted thus avoiding undesirable build up of stresses that otherwise would occur.
- FIG. 1 is a side view of a tractor on which a bulldozer incorporating the present invention is mounted;
- FIG. 2 is a section view taken along the line II-II in FIG. 4;
- FIG. 3 is a section view taken along the line III--III in FIG. 1;
- FIG. 4 is a top view of the tractor and dozer shown in FIG. 1 with the dozer blade in an angled position;
- FIG. 5 is a perspective view of the tractor and dozer incorporating the present invention with the dozer blade angled and tilted downwardly at the left side of the tractor;
- FIG. 6 is a view similar to FIG. 5 except the blade has been tilted upwardly at the left side of the tractor;
- FIG. 7 is a perspective view of the tractor and dozer of the present invention with the blade in a straight (nonangled) position and tilted downwardly at the left side of the tractor;
- FIG. 8 is a side view of a tractor showing a modified form of the present invention.
- FIG. 9 is a section view showing the pivot connection between the C-frame and the dozer blade of FIG. 8;
- FIG. 10 is a partial showing of the tilt mechanism of FIG. 8 with the lower extensible link replaced by a double acting hydraulic jack;
- FIG. 11 is a side view of a tractor showing another embodiment of the present invention.
- a crawler tractor 21 is provided with a pair of endless tracks 22, 22 mounted on track frames 23, 23' which are connected, respectively, to opposite lateral sides of a main frame 24 for vertical swinging movement about a transverse pivot axis 26.
- a C-frame 27 is pivotally connected to the track frames of the tractor on a transverse pivot axis 28. This last mentioned connection being between the rear ends of the leg portions 74, 74 of the C-frame 27 and pivot balls 25, 25 secured to the track frames 23, 23'.
- the central lower rear of a dozer blade 31 is pivotally connected to the bridging portion 73 of the C-frame 27 by a spherical pivot connection 32 (See FIG. 2).
- the upper central rear of the dozer blade 31 is interconnected to an upstanding portion 33 of the bridging portion 73 of the C-frame 27 by a longitudinal link 34 having universal connections 36, 37 therewith.
- Pivot connection 36 is vertically aligned with the lower pivot connection 32.
- the left side of the dozer blade 31 has an upper rear transverse end part universally connected to a front end of a brace 38.
- the rear end of the brace 38 is pivotally connected to the C-frame leg portion 74 by pivot means in the form of a ball and socket connection 39.
- the ball 41 of the ball and socket connection 39 is rigidly secured to a housing in the form of cylindrical member 42 which, as shown in FIG. 3, is in turn connected to the leg portion 74 of the C-frame 27 through a longitudinal guide track 44.
- the guide track 44 coacts with grooves 46, 47 formed in downwardly extending side walls SI, 52 of cylindrical member 42.
- An extensible strut mechanism 56 is interposed between the lower rear transverse end portion at the left side of the dozer blade 31 and the pivot means 39.
- the extensible strut mechanism 56 as illustrated in FIG. 1, includes a longitudinal link 57 having its forward end pivotally connected to the rear of the dozer blade 31 by a universal joint 60.
- the rear end of the link 57 is pivotally connected at its rear end to the lower end of a vertical disclosed lever 58 by a pin 59.
- the lever 58 is pivotally connected intermediate its upper and lower ends to the brace 38 by a pivot pin 61.
- a double acting hydraulic jack 62 is interposed between the upper end of the lever 58 and the forward end of the brace 38.
- the double acting hydraulic jack 62 includes a cylinder 63 having its closed end pivotally connected to the brace 38 by a pivot pin 64 and a piston 65 with a rod portion 66 extending from the open end of the cylinder 63 and pivotally connected to the upper end of the vertical lever 58 by a pivot pin 67.
- the C-frame 27 is swingable vertically about its transverse pivot axis 28 by a pair of double acting hydraulic jacks 71, 71'.
- the double acting hydraulic jacks 71, 71 have cylinders 72, 72 which are gimbel connected to the frame 24 of the tractor and have piston rods 75, 75' pivotally connected to the bridging portion 73 of the C-frame.
- the pivot means 39 and the cylindrical member 42 to which it is rigidly attached is shifted longitudinally on the guide track 44 by a single acting jack 81 which has its cylinder 82 pivotally connected at its closed end to an upstanding bracket 83 on the rear end of the C-frame leg portion 74 by a pin 84.
- the piston 86 of the single acting jack 82 has its free end pivotally connected to the front end of the cylindrical member 42 by a pivot pin 87.
- the hydraulic jack 81 will not be subjected to side thrust since it fits loosely within cylindrical member 42.
- FIG. 4 it will be noted that the jack 81 has been expanded and the jack 81 has been contracted to thereby angle the blade 31 as illustrated.
- the brace 38 and extensible strut mechanism 56' are a reverse image of the brace 38 and strut mechanism 56. So too, the guide track 44', jack 81' and cylindrical member 42' at the right side of the dozer are reverse images of track 44, jack 81 and member 42.
- the angling jack 81 has been retracted and the angling jack 81' has been expanded to angle the dozer blade.
- the tilt jack 62 has been expanded to extend the strut mechanism 56 and the tilt jack 62 has been contracted to contract the extensible strut mechanism 56. This forces the left end of the blade, as viewed from the operators station 101, down and thus the blade cuts deeper on the near end than the far end as viewed in FIG. 5.
- the fixed length braces 38, 38' will force the upper part of the blade rearwardly.
- the link 34 and its pivot connections 36, 37 are so proportioned as to allow the top of the blade to move rearwardly, as the link 34 swings on pivot 37, the same distance as the top is required to move because of the fixed length braces 38, 38'.
- the link 34 actually predetermines the fore and aft movement of the top of the blade 31.
- FIG. 6 shows the blade 32 angled as in FIG. but tilted upwardly on the left side, as viewed by the operator.
- the tilt jack 62 is contracted to retract extensible strut mechanism 56 and tilt jack 62' is extended to extend strut mechanism 56'.
- the right hand end of the blade as viewed from the operator's station 101, is cutting deeper than the left end.
- FIG. 7 shows the blade 31 in a nonangled condition but tilted to cut deeper on the left end than on the right, as viewed by the operator. Note that again the link 34 has swung to the same lateral side that the blade is tilted down, thus allowing the top of the blade to move rearwardly compensating for the distance the top of the blade must move rearwardly due to the fixed length braces 38, 38' interconnecting the top opposite ends of the blade and the leg portions 74, 74' of the C-frame 27.
- FIG. 3 is a side view of a modified form of the present invention.
- the blade 131 may be angled by connecting the pivot means 139 at one of three brackets 142, 143, 144 to the leg 174 of C-frame 127. Tilting is accomplished by extending strut mechanism 156 interconnected between the blade 131 and the rear end of fixed length brace 138, the latter being connected to the C- frame by pivot means 139 in the form of a ball and socket joint.
- the longitudinal link 34 has been eliminated in the FIG. 8 embodiment. This is possible because the dozer construction retains geometric stability and is free of stress bulld-up when tilted because the center pivot connection 132, shown in FIG.
- FIG. 10 a double acting hydraulic jack 256 is shown replacing the mechanically adjustable strut mechanism 156 of the FIG. 8 embodiment of the invention.
- FIG. 11 The embodiment of the invention shown in FIG. 11 is similar to that shown in FIG. 8 except that the brace 38 and strut mechanism 56 of the FIG. I embodiment replace the brace 138 and strut mechanism 156.
- This embodiment is preferred to that of FIG. 10 because the jack 62 is out of the dirt. It is, however, a more expensive adjustable strut mechanism and where cost is a dctermining factor, the lower mounted jack 256 of the embodiment shown in FIG. 10 may be preferred.
- a C-frame presenting leg portions adapted for pivotal connection to opposite sides of a tractor for vertical swinging movement on a transverse axis and presenting a bridging portion between said leg portions adapted for disposition at the front of said tractor,
- braces having corresponding front ends pivotally connected, respectively, to transversely opposite upper rear ends of said blade
- pivot means connecting the rear portions of said brace and strut mechanism disposed at one end of said blade to one leg of said C-frame
- pivot means connecting the rear portions of said brace and strut mechanism disposed at the other end of said blade to the other leg of said C-frame,
- a longitudinally extending link pivotally connected at its front end to the top central rear of said blade and pivotally connected at its rear end to said bridging portion of said C-frame at a point spaced substantially above the points at which said struts are connected to said blade.
- each of said strut mechanisms includes a fluid operated jack.
- each of said strut mechanisms includes a longitudinal link part having a front end constitut' ing said front end of said strut mechanism
- an extensible link part including said fluid operated jack interconnected between said associated brace and the top portion of said lever.
- said means permitting selective longitudinal positioning of said pivot means includes a pair of housing members to which said pivot means are, respectively, secured,
- a pair of fluid operated jacks disposed at least partially within and in telescoping relation to said housing members and having their cylinder components connected, respectively, to said leg portions and their piston components connected, respectively, to said housing members.
- said strut mechanisms each include a fluid operating jack.
- each of said strut mechanisms includes a longitudinal link part having a front end constituting said front end of said strut mechanism
- an extensible link part including said fluid operated jack interconnected between said associated brace and the top portion of said lever.
- a C-frame presenting leg portions adapted for pivotal connection to opposite sides of a tractor for vertical swinging movement on a transverse axis and presenting a bridging portion between said leg portions adapted for disposition at the front of said tractor,
- braces having corresponding front ends pivotally connected, respectively, to transversely opposite upper rear ends of said blade
- pivot means connecting, respectively, the rear portions of said braces to said legs of said C-frame
Landscapes
- 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)
- Agricultural Machines (AREA)
- Body Structure For Vehicles (AREA)
- Operation Control Of Excavators (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US24194972A | 1972-04-07 | 1972-04-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3749182A true US3749182A (en) | 1973-07-31 |
Family
ID=22912850
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00241949A Expired - Lifetime US3749182A (en) | 1972-04-07 | 1972-04-07 | Angle and tilt mechanism for bulldozer |
Country Status (5)
Country | Link |
---|---|
US (1) | US3749182A (de) |
JP (1) | JPS499003A (de) |
CA (1) | CA970560A (de) |
DE (1) | DE2317172C3 (de) |
IT (1) | IT981882B (de) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2730787A1 (de) * | 1977-07-07 | 1979-01-18 | Aalener Baumaschinen | Hydromechanisch verstellbarer planierschild |
WO1979000370A1 (en) * | 1977-12-12 | 1979-06-28 | Caterpillar Tractor Co | Bulldozer blade angle slide mechanism |
WO1980001296A1 (en) * | 1978-12-21 | 1980-06-26 | G Freese | Slide rail assembly for a work vehicle |
US4221268A (en) * | 1978-12-21 | 1980-09-09 | Caterpillar Tractor Co. | Slide rail assembly for a work vehicle |
WO1981002597A1 (en) * | 1980-03-10 | 1981-09-17 | Caterpillar Tractor Co | Slide rail assembly for a work vehicle |
WO1984000570A1 (en) * | 1982-07-30 | 1984-02-16 | Bombardier Rotax Wien | Device for attaching a tool to a vehicle |
US20050236226A1 (en) * | 2004-04-21 | 2005-10-27 | Salmi James A | Aerial ladder cradle assembly |
US20130240226A1 (en) * | 2012-03-16 | 2013-09-19 | Pearson Engineering Limited | Mounting Assembly For Mounting Implement To A Vehicle |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5585142U (de) * | 1978-12-07 | 1980-06-12 | ||
JPS57150349U (de) * | 1981-03-11 | 1982-09-21 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2943407A (en) * | 1958-02-27 | 1960-07-05 | Case Co J I | Bulldozer blade mounting |
-
1972
- 1972-04-07 US US00241949A patent/US3749182A/en not_active Expired - Lifetime
- 1972-10-24 CA CA154,759A patent/CA970560A/en not_active Expired
-
1973
- 1973-04-05 IT IT22611/73A patent/IT981882B/it active
- 1973-04-05 DE DE2317172A patent/DE2317172C3/de not_active Expired
- 1973-04-06 JP JP48039413A patent/JPS499003A/ja active Pending
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2730787A1 (de) * | 1977-07-07 | 1979-01-18 | Aalener Baumaschinen | Hydromechanisch verstellbarer planierschild |
WO1979000370A1 (en) * | 1977-12-12 | 1979-06-28 | Caterpillar Tractor Co | Bulldozer blade angle slide mechanism |
US4217963A (en) * | 1977-12-12 | 1980-08-19 | Caterpillar Tractor Co. | Bulldozer blade angle slide mechanism |
US4312411A (en) * | 1978-12-12 | 1982-01-26 | Caterpillar Tractor Co. | Slide rail assembly for a work vehicle |
WO1980001296A1 (en) * | 1978-12-21 | 1980-06-26 | G Freese | Slide rail assembly for a work vehicle |
US4221268A (en) * | 1978-12-21 | 1980-09-09 | Caterpillar Tractor Co. | Slide rail assembly for a work vehicle |
WO1981002597A1 (en) * | 1980-03-10 | 1981-09-17 | Caterpillar Tractor Co | Slide rail assembly for a work vehicle |
WO1984000570A1 (en) * | 1982-07-30 | 1984-02-16 | Bombardier Rotax Wien | Device for attaching a tool to a vehicle |
US20050236226A1 (en) * | 2004-04-21 | 2005-10-27 | Salmi James A | Aerial ladder cradle assembly |
US7178631B2 (en) * | 2004-04-21 | 2007-02-20 | Spartan Motors, Inc. | Aerial ladder cradle assembly |
US20130240226A1 (en) * | 2012-03-16 | 2013-09-19 | Pearson Engineering Limited | Mounting Assembly For Mounting Implement To A Vehicle |
US8887827B2 (en) * | 2012-03-16 | 2014-11-18 | Pearson Engineering Limited | Mounting assembly for mounting implement to a vehicle |
Also Published As
Publication number | Publication date |
---|---|
DE2317172B2 (de) | 1978-12-14 |
JPS499003A (de) | 1974-01-26 |
CA970560A (en) | 1975-07-08 |
IT981882B (it) | 1974-10-10 |
DE2317172A1 (de) | 1973-10-11 |
DE2317172C3 (de) | 1979-08-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: FIATALLIS EUROPE S.P.A., ZONA INDUSTRIALE SURBO, I Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:FIATALLIS NORTH AMERICA, INC., A DE CORP;REEL/FRAME:004389/0443 Effective date: 19850228 |