US3655000A - Power pitching bullgrader - Google Patents
Power pitching bullgrader Download PDFInfo
- Publication number
- US3655000A US3655000A US2207A US3655000DA US3655000A US 3655000 A US3655000 A US 3655000A US 2207 A US2207 A US 2207A US 3655000D A US3655000D A US 3655000DA US 3655000 A US3655000 A US 3655000A
- Authority
- US
- United States
- Prior art keywords
- blade
- housing
- pair
- frame
- struts
- 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
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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
- E02F3/7609—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
- E02F3/7618—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 horizontal axis
-
- 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 Power-adjusted bulldozing attachment for a tractor having a C-frame and a bullgrading blade capable of pitching, tilting, and angling.
- a mid-region of the blade has a universal mounting on the base of'the C-frame.
- Pairs of strut member incorporating power units are connected to the ends of the blade and the legs of the C-frame for pitching and tilting the blade.
- the blade is angled by shifting the struts along tracks on the legs of the C-frame.
- the struts are fixed at various locations on the frame by the use of lock pieces on the struts and spaced slots in the tracks receiving the lock pieces.
- the present invention relates to a bulldozing attachment for a tractor. More specifically, the invention provides for various kinds of movement of a bullgrading blade which moves both with and relative to a single supporting C-frame in the attachment.
- An object of the present invention is to provide a simplified mounting for a bulldozing blade that will avoid the aforementioned difficulty, and afford a whole series of movements.
- a specific object is to provide an improved mounting C-frame structure for mounting a blade to impart pitching movement thereto.
- a further specific object is to provide an improved structure mounting a blade for giving it angling movement.
- FIG. 1 is a plan view of the bulldozing attachment of the present invention
- FIG. 2 is a side view of the attachment
- FIG. 3 is a plan view of a track forming an inventive part of the present attachment
- FIG. 4 is a side view of the track
- F IG. 5 is an end view of the track
- FIG. 6 is a vertical sectional view taken on the line 6-6 of FIG. 1 showing the connection of strut means to a track;
- FIG. 7 is a horizontal sectional view taken on the line 7--7 of FIG. 6.
- a bulldozing attachment 10 comprises a C-frame l1 and a blade 12 adjustably connected thereto.
- the C-frame 11 in customary way has the free ends of legs 13 pivotally connected on an axis 14 to a tractor 15.
- a base 16 of the C-frame 11 has its mid-region connected to a lower central section or mid-region of the blade 12 by means of a pin member 17 secured to the base 16 and a socket member 18 secured to the blade 12.
- the pin member 17 has a spherical ball head 19 which is received in a spherical cavity in the socket member 18 to form a universal mounting joint of the general type hereinafter referred to variously as ball type connection or simply ball joint or ball connection.
- two strut means 20 are .provided, one of which is connected to one end of the blade 12 connected to the other end of the blade 12 and the other leg 13 of the C-frame 11.
- Each strut means 20 comprises a lower strut 21 of fixed length and an upper strut 22 of adjustable length.
- One end of the lower strut 21 is connected with a lower region of the end of the blade 12 by a joint of the ball type, and the other end of the lower strut 21 is connected to a trunnion ball 23.
- At one end of the upper link 22 I use another ball-type connection, made to an upper region of the end of the blade 12, and the opposite end of the link 22 is connected with the lower link 21 near or at the end thereof away from the blade 12.
- the upper link 22 incorporates a hydraulic power unit 24 composed of a cylinder 25, a piston (not shown) slidably mounted therein, and a piston rod 26 secured to the piston and projecting from the cylinder 25.
- the trunnion ball 23 is secured to the side of a housing 27, which is mounted on and receives a track 28 secured to the top of the leg 13 of the C- frame 11.
- the track 28 is of cross shape and has opposed flanges 29 extending from opposite sides thereof in spaced relation to the top and the bottom of the track 28.
- the track 28 has a plurality of slots 30, which may be three in number as shown, located at longitudinally spaced regions of the track and extending from the top thereof with open sides down to the flanges 29.
- the bottom of each slot 30 is crowned in two sloping surfaces 31 so as to be self-cleaning.
- the ends of each slot 30 are arcuate so as to accommodate a lock piece 32 of circular shape, which is vertically slidably into and out of the slot 30 in a cir cular cylindrical bore 33 formed in the housing 27.
- the lock piece 32 has a vertical bolt hole through which it is loosely attached by means of a bolt 34 to the end of a piston 35 protruding from a cylinder 36.
- the other end of the piston 35 is enlarged and is slidably mounted in the cylinder 36.
- the cylinder is attached to the upper portion of the bore 33 in the housing 27.
- Seals 37 for a chamber 38 formed between the piston 35 and cylinder 36 are located in grooves fonned on the enlarged end of the piston 35 and in a reduced end of the cylinder 36 through which the piston 35 protrudes.
- Hydraulic fluid supplied through a passage 41 formed in the housing 27 and cylinder 36 to the chamber 38 will move the piston 35 upwards and thus lift the lock piece 32 out of the slot 30.
- the housing 27 has a cruciform slot receiving the track 28 and its flanges 29 relatively tightly and can be slid along the track 28 for engagement of the lock piece 32 in any of the three slots 30 shown.
- Relief passages 41a extending from the bore 33 in the housing 27 to the exterior thereof are provided. Any soil that may adhere to the bore 33 will be extruded out through passages 41a as the lock piece 32 is depressed.
- the lock pieces 32 are released from the slots 30 in the tracks 28 by being raised, and the blade 12 is angled as desired, one housing 27 and its lock piece 32 moving forwardly to the front slot 30 on the one track 28, and the other housing 27 and its lock piece 32 moving rearwardly to the rear slot 30 on the other track 28.
- the blade 12 is angled by means of a hydraulic power unit 42 connected at one end to the blade 12 and at the other end to the base 16 of the C-frame 11.
- the blade 12 may be angled by application of tractive effort against one end of the blade or by steering of the tractor to the left or right while the blade is under a bulldozing load. Such operations are, of course, carried out while the lock pieces 32 are raised out of the slots 30.
- Tilting of the blade 12 with respect to the frame 11 involving movement about a horizontal axis longitudinal of the tractor is produced by lengthening of the upper strut 22 of one strut means 20 and the shortening of the upper strut 22 of the other strut means 20.
- lock pieces 32 can be moved in and out of the sockets 30 in the tracks 28 by manually acutatable rods or the like, instead of the hydraulic pistons 35.
- tilting, pitching, and angling of the blade 12 are in a sense centered in the two strut means 20.
- Angling of the blade takes place by movement of the housings 27 connected to the struts 21 of the strut means 20 along the tracks 28.
- Pitching of the blade 12 takes place by virtue of adjustment of one sort of the upper links 22 of the link means 20. Tilting occurs because of adjustment of a different sort of the upper links 22.
- These three movements of the blade 12 with respect to the frame 11 are centered in the two strut means 20, because the swivel connection of the blade 12 with the base 16 of the frame 11 in the socket member 18 and the ball head 19 (FIG. 1) is on a line extending athwart of the C-frame between the ball joint connections of the lower struts 21 with the blade 12.
- the tractor operator can tilt, pitch, elevate, and angle the blade to a precise attitude without leaving the seat of the tractor, for the controls for the power units 24 and 42 and the pistons 35 in cylinders 33 producing such movements are within easy reach of the tractor seat.
- a control for hydraulic power cylinders 43 acting between the C-frame l1 and tractor for pivoting the C-frame 11 up and down at the front of the tractor with respect to the axis 14, is also located convenient to the operators seat.
- the usual cylinder circuits include pumps, reservoir, control valves, hoses, and conduits in customary way and, for simplification, are not illustrated.
- an angling adjustment means comprising: a slidably related rail and housing; the rail having transverse lock receiving slots therein; a lock in the housing having shifting means for retracting and advancing same away from the rail and theretoward so as to be received in a selected receiving slot; said lock when in a slot effectively keying together the slidably related housing and rail, and having a transversely defiectible connection to the shifting means whereby the lock is placed in shear over a large area when keyed in the slot without creating bending or shearing stresses in the shifting means; the retractively and advancingly shifting connection characterized by a pin 34 connected to the shifting means; and an opening in the lock in which the pin fits so as to be loose in all diametric directions as viewed in cross section.
- a bulldozer attachment for a tractor comprising a C- frame having two spaced legs and a base connecting the legs, the ends of the legs remote from the base being adapted to be pivotally connected to opposite sides of the tractor, a blade extending along the base of the C-frame, means pivotally connecting a mid-region of the blade with a mid-region of the base of the C-frame, two pairs of struts for pitching and tilting the blade, one strut of each pair being of adjustable length and the other strut of fixed length, the struts of one pair being connected to vertically spaced regions of the blade near one end thereof, the struts of the other pair being connected to vertically spaced regions of the blade near the other end thereof, the struts of one pair being connected to one another at their ends remote from the blade, the struts of the other pair being connected to one another at their ends remote from the blade, a pair of tracks, one being secured to and extending along one leg of the C-frame, the other being secured
- angling adjustment means comprising a slidably related rail and housing carried at the side of the tractor;
- said rail having transverse lock receiving slots therein;
- a lock in said housing having shifting means for retracting and advancing said lock away from the rail and theretoward so as to be received in a selected receiving slot;
- said lock when in a slot being subjected to locking stresses while effectively keying together the slidably related housing and rail, and having a transversely deflectible connection to the shifting means to avoid stress-transmission, said connection comprising a pin connected to one of the shifting means and lock, and means forming an opening in the other one of the shifting means and lock in which the pin fits so as to be loose in at least one of the diametric directions as viewed in cross section.
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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)
Abstract
Description
Claims (3)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US220770A | 1970-01-12 | 1970-01-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3655000A true US3655000A (en) | 1972-04-11 |
Family
ID=21699695
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US2207A Expired - Lifetime US3655000A (en) | 1970-01-12 | 1970-01-12 | Power pitching bullgrader |
Country Status (1)
Country | Link |
---|---|
US (1) | US3655000A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3866342A (en) * | 1973-02-13 | 1975-02-18 | George R Cooper | Reversible snow plow attachment for wheeled vehicles |
US6955229B1 (en) * | 2003-07-18 | 2005-10-18 | Hoffart Ronald J | Implement pitch-yaw system |
WO2010072182A1 (en) | 2008-12-24 | 2010-07-01 | Servisbal Obaly S.R.O. | A multi-functional insert |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3059356A (en) * | 1961-04-24 | 1962-10-23 | Leo J Lorang | Bulldozer blade mount |
US3160215A (en) * | 1962-12-28 | 1964-12-08 | Will R Harrell | Blade mounting means for a multiple purpose blade |
US3386519A (en) * | 1965-06-30 | 1968-06-04 | Case Co J I | Hydraulic cylinder mounting |
US3400767A (en) * | 1965-07-21 | 1968-09-10 | Int Harvester Co | Power angling bullgrader |
US3521714A (en) * | 1967-11-13 | 1970-07-28 | James C Farris | Bulldozer blade and mounting assembly |
-
1970
- 1970-01-12 US US2207A patent/US3655000A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3059356A (en) * | 1961-04-24 | 1962-10-23 | Leo J Lorang | Bulldozer blade mount |
US3160215A (en) * | 1962-12-28 | 1964-12-08 | Will R Harrell | Blade mounting means for a multiple purpose blade |
US3386519A (en) * | 1965-06-30 | 1968-06-04 | Case Co J I | Hydraulic cylinder mounting |
US3400767A (en) * | 1965-07-21 | 1968-09-10 | Int Harvester Co | Power angling bullgrader |
US3521714A (en) * | 1967-11-13 | 1970-07-28 | James C Farris | Bulldozer blade and mounting assembly |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3866342A (en) * | 1973-02-13 | 1975-02-18 | George R Cooper | Reversible snow plow attachment for wheeled vehicles |
US6955229B1 (en) * | 2003-07-18 | 2005-10-18 | Hoffart Ronald J | Implement pitch-yaw system |
WO2010072182A1 (en) | 2008-12-24 | 2010-07-01 | Servisbal Obaly S.R.O. | A multi-functional insert |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: DRESSER INDUSTRIES, INC., A CORP. OF DEL., STATELE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:INTERNATIONAL HARVESTER COMPANY;REEL/FRAME:004130/0646 Effective date: 19821101 Owner name: DRESSER INDUSTRIES, INC., A CORP. OF DEL. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:INTERNATIONAL HARVESTER COMPANY;REEL/FRAME:004130/0646 Effective date: 19821101 |
|
AS | Assignment |
Owner name: KOMATSU DRESSER COMPANY, E. SUNNYSIDE 7TH ST., LIB Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:DRESSER FINANCE CORPORATION, A CORP. OF DE.;REEL/FRAME:004994/0077 Effective date: 19880901 Owner name: DRESSER FINANCE CORPORATION, DALLAS, TX., A DE COR Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:DRESSER INDUSTRIES, INC.;REEL/FRAME:004994/0061 Effective date: 19880831 |