EP0123549A2 - Balai pour graders - Google Patents

Balai pour graders Download PDF

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Publication number
EP0123549A2
EP0123549A2 EP84302735A EP84302735A EP0123549A2 EP 0123549 A2 EP0123549 A2 EP 0123549A2 EP 84302735 A EP84302735 A EP 84302735A EP 84302735 A EP84302735 A EP 84302735A EP 0123549 A2 EP0123549 A2 EP 0123549A2
Authority
EP
European Patent Office
Prior art keywords
surface treatment
treatment member
mold board
broom
control
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.)
Withdrawn
Application number
EP84302735A
Other languages
German (de)
English (en)
Other versions
EP0123549A3 (fr
Inventor
George E. Long
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0123549A2 publication Critical patent/EP0123549A2/fr
Publication of EP0123549A3 publication Critical patent/EP0123549A3/fr
Withdrawn legal-status Critical Current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
    • E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
    • E02F3/7636—Graders with the scraper blade mounted under the tractor chassis
    • E02F3/765—Graders with the scraper blade mounted under the tractor chassis with the scraper blade being pivotable about a horizontal axis disposed perpendicular to the blade
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H1/00—Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
    • E01H1/02—Brushing apparatus, e.g. with auxiliary instruments for mechanically loosening dirt
    • E01H1/05—Brushing apparatus, e.g. with auxiliary instruments for mechanically loosening dirt with driven brushes
    • E01H1/056—Brushing apparatus, e.g. with auxiliary instruments for mechanically loosening dirt with driven brushes having horizontal axes
    • 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
    • E02F3/7604—Combinations of scraper blades with soil loosening tools working independently of scraper blades
    • 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
    • E02F3/8155—Blades; Levelling or scarifying tools provided with movable parts, e.g. cutting discs, vibrating teeth or the like
    • 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
    • E02F3/84—Drives or control devices therefor, e.g. hydraulic drive systems
    • E02F3/844—Drives or control devices therefor, e.g. hydraulic drive systems for positioning the blade, e.g. hydraulically
    • E02F3/845—Drives or control devices therefor, e.g. hydraulic drive systems for positioning the blade, e.g. hydraulically using mechanical sensors to determine the blade position, e.g. inclinometers, gyroscopes, pendulums

Definitions

  • This invention relates to road grading and maintenance equipment, and more specifically to road graders having mold boarcsor blades for grading a surface, and vehicles having rotary sweepers for brushing debris from a surface.
  • Motor graders having a mold board or blade for scraping a surface are commonly known and extensively used in highway and airport construction and maintenance.
  • the grader blade is passed over a surface with the mold board smoothing and scraping off irregularities to provide a finished surface which may then be either paved or coated with oil or asphaltic material to provide a smooth hard surface.
  • a separate piece of equipment having its own operator and mounting a rotary broom is then passed over the finished surface to clear away the finer debris left behind once the construction is completed.
  • shoulder repair work may be required on existing paved surfaces. In these situations, a motor grader blade is used to provide a reworked shoulder surface.
  • This procedure may also require other earth moving equipment in the area creating a need for general clean up of the road surface for safety reasons as well as appearance.
  • specialized pieces of equipment and skilled operators are needed in most instances, which contributes significantly to the overall cost.
  • Most road and highway maintenance organizations do in fact need both a grader and a broom.
  • the present invention includes a rotary broom assembly mounted in conjunction with a mold board on a conventional circle arrangement commonly used in motor graders.
  • the broom assembly may be mounted parallel to the mold board on the circle of the grader for movement therewith. Additionally, the broom assembly is capable of vertical adjustment and sideways movement or "side shifting" independently of the mold board.
  • the broom assembly in one of the illustrated embodiments includes a longitudinal crossbar which passes through a pair of collars on the blade mounting arms which descend from the circle and act asa pivotal axis for vertical pivoting of the broom assembly.
  • a hydraulic ram may be affixed at one end to the circle, and at the other end to any such means as a slide bar or the like mounted on the shield or hood which overlies the broom.
  • the broom assembly thus may be raised and lowered by action of the conventional vertical adjustment of the circle or relative thereto by the hydraulic ram.
  • vertical adjustment of the broom assembly is accomplished by linear movement.
  • pin and slot connector members are mounted directly to the blade mounting arms.
  • the pin and slot connectors carry the broom assembly and may be raised and lowered relative to the blade by means of a double hydraulic ram arrangement acting between the circle and the connectors. In some cases it may be desirable or necessary to use multiple sets of lift cylinders to accommodate or share the load of the broom as it is shifted laterally.
  • a horizontal ram may be mounted to act between one of the blade mounting arms and the broom shield in the first embodiment described to shift the broom assembly sideways relative to the mold board and or circle.
  • the side shift ram may be connected to act between one of the pin and slot connectors and the broom hood.
  • Feelers or sensor arms positioned on the ends of the broom assembly are used to close switches upon contact with obstacles such as posts, stakes, or curbs, causing the horizontal hydraulic ram to automatically side shift the broom away from the obstacle. This method may also be used to side shift the mold board to avoid such obstacles.
  • Limit switches mounted on the structure of the motor grader may be used as sensors which close when contacted by the broom assembly, causing the vertical or horizontal ram to automatically pivot or shift the broom away from the motor grader structure so as to avoid interference between the two when the blade is angled, raised or lowered.
  • position sensor mounted in conjunction with the vertical and side shift linkages of the circle may be used to signal the movement of the broom assembly to avoid interference with the motor grader structures.
  • the number of rotations of the broom per foot of travel of the device is held constant or settable at different preselected speeds by a broom rotation speed control circuit, and the downward pressure of the broom is controlled by a broom pressure control circuit.
  • the motor grader broom device 1 of a preferred embodiment may be conventional in all respects, the operation and control of which are well known in the construction arts.
  • the device includes a rotary broom assembly 2 mounted parallel to the conventional grader assembly 3 on a circle 6 of a well-known design, for movement therewith.
  • the grader assembly 3 includes a mold board 4 mounted in front of the broom assembly 2, in a conventional manner on the circle 6. As illustrated in Figure 3, the circle is rotated by a drive pinion 7, so as to rotate the mold board 4 and, in the present embodiment, the broom assembly 2 in a horizontal plane.
  • the cross angle of the blade or mold board is thus adjusted relative to the direction of travel of the machine to control the width of cut and the windrow of the material scraped.
  • the mold board support assembly 8 also provides sideways adjustment of the position of the mold board 4 in response to well known automatic control means, and the side shift cylinder 5.
  • Conventional operator-actuated controls are provided to pivot the circle 6 along a horizontal axis transverse to the length of the mold board 4, as shown in Figure 7, and also to raise and lower the circle as shown in Figure 8. It will be understood that the structural details of the described controls for the blade 4 are conventional and form no part of the present invention except as they relate functionally with the rotary broom assembly.
  • the broom assembly 2 includes a horizontal rotary broom 9 mounted on a rotary shaft 11.
  • a curved shield or hood 12 overlies the broom 9 and prevents debris from flying into the surrounding mechanism in a conventional manner.
  • the broom assembly 2 may be driven by a conventional reversible hydraulic motor 13 at a speed which is preferably held to a constant number of rotations per foot of forward travel or preselected speeds of the motor grader 1 by a speed adjustment circuit.
  • This circuit includes a speed transducer 14 which produces an output voltage proportional to the speed at which the motor grader is travelling.
  • the output from the speed transducer 14 is connected to a speed adjustment potentiometer 16, which the operator can set to a resistance proportional to the desired number of broom rotations per foot of travel, to produce a resultant voltage Vt proportional to the desired target rotational speed of the broom 9, while a rotational speed transducer 17 produces a voltage Va proportional to the actual rotational speed of the broom 9.
  • An error amplifier 18 amplifies the difference between the voltages Va and Vt, and an error integrator 19 integrates the output from the amplifier 18.
  • an error integrator 19 integrates the output from the amplifier 18.
  • the difference between Va and Vt is zero, no correction to the rotational speed of the broom 9 is needed, and the output voltage Vi from the integrator 19 remains constant. If the difference between Va and Vt increases to a non-zero value, then Vi changes at a rate determined by the resistor R 1 , and capacitor C . , in the integrator 19, to supply the desired voltage to the motor 13.
  • a buffer 21 boosts the voltage Vi as needed to drive the motor 13.
  • brackets 22 on the opposite ends of shield 12 support a crossbar 23 parallel to the broom 9.
  • the crossbar 23 passes through collars 26 mounted the pair of blade mounting arms 27 which normally extend from and are fixed to the circle 6.
  • the cross bar is slidably received in the collars for linear movement.
  • a horizontally disposed hydraulically actuated ram 28 of conventional design has one end fixed to one of the arms 27, and the other to the shield 12 for shifting the broom assembly 2 sideways.
  • a generally vertical ram 29 is mounted with one end fixed to the circle 6 and the other end slidably mounted on a slide bar 31 on the shield 12 to pivot the broom assembly 2 about the crossbar 23 in a generally vertical position.
  • the slide bar 31 allows the piston rod to travel therealong during side shifting of the broom.
  • the horizontal and vertical rams 28, 29 in the present embodiment are automatically controlled by three limit switches 32, 33, 34 on the body of the device 1 which close on contact with the broom assembly 2.
  • Each of the first two limit switches 32, 33 is positioned to contact an end of the broom assembly 2 as it rotates or pivots with the circle 6 in the manner shown in Figures 5 and 7.
  • the positon of the limit switches may be chosed so as to provide the optimum functionality for any particular road grader frame design and degree of movement of the broom desired.
  • either of these limit switches 32, 33 activates the horizontal ram 28 to shift the broom assembly 2 to the opposite side so that it will not contact either the wheels or frame of the device 1 or other surrounding structure.
  • other rotational controls may be devised such as a limit switch or the like mounted on the circle or any relatively moving parts of the rotary frame. Any such modification is considered to be within the scope of the present invention.
  • the third limit switch 34 may preferably be positioned on the undercarriage of the device 1 to contact the circle 6 when it is raised beyond a predetermined point where the broom assembly 2 might hit the surrounding structure of the motor grader device at any given position of horizontal rotation. When this contact occurs, the third limit switch 34 will activate the vertical ram 2 to pivot the broom assembly 2 downward, if it is not already in a dropped position, so that it will clear the undercarriage of the device as the broom and grader assemblies 2, 3 are raised along with the circle 6.
  • a feeler 36 as shown in Figure 12 may be mounted to each end of the broom assembly 2.
  • Each of the two feelers 36 will close a switch on contact with an obstacle in a well known manner, to activate the horizontal ram 28 for shifting the broom assembly 2 away from the obstacle.
  • the mold board 4 is raised by the conventional control means of the grader to an elevation several inches above the surface to be swept. In most cases a clearance of 6 to 8 inches above the surface will be sufficient to allow the material being swept by rotary action of the broom to be thrown forwardly under the blade edge. With the broom and blade in the angled position shown in Figure 5 for instance, the material will work its way to one side off of the roadway or to be windrowed and picked up later. The blade positioned in front of the broom will, of course, remove any large obstacles from the path of the broom and prevent any large build up of material as the machine advances.
  • the broom assembly When dirt is windrowed, the broom assembly may be raised and the blade then used in its normal fashion to remove and distribute the material.
  • the broom 9 is positioned to contact the ground by any well-known manual, electrical or other valve means controlled by the machine operator for activating the vertical lift ram 29.
  • the downward pressure of the broom 9 is held constant by an electrical pressure control circuit which maintains a predetermined pressure in the hydraulic cylinder or lines. In this manner only a predetermined proportion of the broom weight is allowed to rest on the surface. This is determined, of course, by the amount of lift pressure maintained in the hydraulic line.
  • the control circuit includes a pressure transducer 37 which produces a voltage Vu proportional to the upward force of the vertical ram 29.
  • a pressure adjustment potentiometer 38 and zero adjustment potentiometer 39 which are initially adjusted by the operator, produce a voltage Vd, proportional to the desired pressure of the broom 9.
  • an error amplifier 41 amplifies the difference between Vu and Vd, and an error integrator 42 integrates this difference to produce an integrator output voltage Vi, which drives an electric valve 43 through a buffer 44, to supply the amount of hydraulic pressure, to the vertical ram 29 necessary to apply the predetermined amount of lift on the broom 9 to allow it to bear against the road surface with the desired amount of downward pressure.
  • a reverse speed comparator 46 receives the voltage Vt representing the rate of travel of the-device 1, and activates the vertical ram 29 when the polarity of Vt is reversed from its normal state.
  • a buffer 41 raises the output voltage from the comparator 46 as needed to drive the vertical ram 29.
  • Figures 9 and 10 illustrate a modified mounting structure for the broom assembly which provides for linear vertical adjustment of the broom assembly relative to the blade rather than the pivotal vertical adjustment of the Figures 1-4 embodiment. It will be understood, of course, that the overall function of the broom assembly and automatic controls remain the same for both embodiments, the primary difference being in the positioning and functioning of the "side shift" and “vertical lift” rams of the broom assembly. For this reason identical reference numerals will be used to describe the various structural members of Figures 9 and 10 which are identical to the Figures 1-4 embodiment.
  • the blade support arms 27 which are fixed to the circle 6 are each provided with brackets 48.
  • the brackets 48 may be welded or otherwise fixed to the lower portions of the arms 27 or other suitable locations and, in the embodiment illustrated, are preferably located on the outside surfaces of the arms.
  • Each bracket 48 is provided with an elongated substantially vertical slot 49 with the slots being transversely aligned on the blade arms.
  • the transversely extending broom hood 12 is provided with an elongated rail or slider bar structure 51 which is located on one side of the hood adjacent to the brackets 48 and includes the side flanges 52 and 53.
  • the slider bar structures may be made from bar stock and conveniently welded or otherwise fixed to the hood.
  • a connector frame serves to connect the broom assembly to the brackets 48 and includes the end plates 54 which may be identical and are rigidly connected together by a cross tie bar 56 to form the connector frame.
  • Each end plate is provided with two vertically aligned pins 57 which engage the respective slots 49 in the brackets 48 to form a pin and slot connection to guide vertical lift movement of the connector frame and boom assembly.
  • the vertical lift ram means in this embodiment is connected between the circle 6 and the cross tie bar described.
  • the lift ram means may be comprised of two independent double acting hydraulic cylinders 58 and 59 coupled in a manner illustrated in Figure 9 so as to substantially double the reach capacity of a single ram.

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  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • General Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Operation Control Of Excavators (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Casting Devices For Molds (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP84302735A 1983-04-25 1984-04-24 Balai pour graders Withdrawn EP0123549A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US48808483A 1983-04-25 1983-04-25
US488084 1983-04-25

Publications (2)

Publication Number Publication Date
EP0123549A2 true EP0123549A2 (fr) 1984-10-31
EP0123549A3 EP0123549A3 (fr) 1985-05-22

Family

ID=23938274

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84302735A Withdrawn EP0123549A3 (fr) 1983-04-25 1984-04-24 Balai pour graders

Country Status (4)

Country Link
EP (1) EP0123549A3 (fr)
JP (1) JPS6016624A (fr)
CA (1) CA1224919A (fr)
NO (1) NO841610L (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0210347A3 (en) * 1985-07-26 1987-11-11 Ing. Alfred Schmidt Gmbh Snow sweeper with a rotating cylindrical brush
EP0270674A4 (fr) * 1986-04-08 1988-06-08 Komatsu Mfg Co Ltd Transmission automatique d'un chargeur a roue.
EP0284600A3 (fr) * 1987-03-23 1989-08-23 Famag Fahrzeug- und Maschinenhandelsgesellschaft m.b.H. Nfg. KG. Elément de brosse pour brosses cylindriques
EP0843047A1 (fr) * 1996-11-18 1998-05-20 Schmidt Holding Europe GmbH Unité de balayage pour le montage sur un véhicule ou une remorque
EP0882843A3 (fr) * 1997-06-02 2000-03-01 Gansow Elektrobau GmbH Dispositif pour contrôler automatiquement l'opération de balayage dans un véhicule de nettoyage des sols
CN107882089A (zh) * 2017-02-24 2018-04-06 徐州徐工筑路机械有限公司 铲刀工作装置和平地机
US9938689B2 (en) 2015-10-13 2018-04-10 Deere & Company Coordinated implement control for work vehicle

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11395820B2 (en) 2016-03-16 2022-07-26 H. Lee Moffitt Cancer Center And Research Institute, Inc. Small molecules against cereblon to enhance effector t cell function
BR112021000395A2 (pt) 2018-07-11 2021-04-06 H. Lee Moffitt Cancer Center And Research Institute, Inc. Compostos imunomoduladores diméricos contra mecanismos baseados em cereblon
CN113309159B (zh) * 2020-02-27 2024-08-09 山东交通学院 一种基于回转平动机构的平地机刮土工作装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1559278A (en) * 1924-10-20 1925-10-27 John M Neuert Street-sweeping machine
US1806054A (en) * 1928-02-15 1931-05-19 Gardner George Sweeping attachment for road graders
US3287834A (en) * 1964-04-06 1966-11-29 Eithel G Hopkins Motor grader mold board attachment
US3448816A (en) * 1967-05-22 1969-06-10 Caterpillar Tractor Co Limit system for motor grader blade controls
US3880243A (en) * 1971-02-10 1975-04-29 Cmi Corp Road building machine with two adjustable work implements
DE2455200A1 (de) * 1974-11-21 1976-05-26 Kibo Kommunalmasch Gmbh & Co Regelungsanordnung
DE2821627A1 (de) * 1978-05-18 1979-11-22 Siegfried Kugelmann Hoehenfuehrung der buerstenwalze und/oder tellerbuerste einer strassenreinigungsmaschine

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0210347A3 (en) * 1985-07-26 1987-11-11 Ing. Alfred Schmidt Gmbh Snow sweeper with a rotating cylindrical brush
EP0270674A4 (fr) * 1986-04-08 1988-06-08 Komatsu Mfg Co Ltd Transmission automatique d'un chargeur a roue.
EP0284600A3 (fr) * 1987-03-23 1989-08-23 Famag Fahrzeug- und Maschinenhandelsgesellschaft m.b.H. Nfg. KG. Elément de brosse pour brosses cylindriques
EP0843047A1 (fr) * 1996-11-18 1998-05-20 Schmidt Holding Europe GmbH Unité de balayage pour le montage sur un véhicule ou une remorque
EP0882843A3 (fr) * 1997-06-02 2000-03-01 Gansow Elektrobau GmbH Dispositif pour contrôler automatiquement l'opération de balayage dans un véhicule de nettoyage des sols
US9938689B2 (en) 2015-10-13 2018-04-10 Deere & Company Coordinated implement control for work vehicle
CN107882089A (zh) * 2017-02-24 2018-04-06 徐州徐工筑路机械有限公司 铲刀工作装置和平地机
CN107882089B (zh) * 2017-02-24 2023-09-22 徐州徐工筑路机械有限公司 铲刀工作装置和平地机

Also Published As

Publication number Publication date
JPS6016624A (ja) 1985-01-28
NO841610L (no) 1984-10-25
CA1224919A (fr) 1987-08-04
EP0123549A3 (fr) 1985-05-22

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