EP0261093B1 - Largeur variable d'un système de distribution du matériau pour des finisseuses et similaires - Google Patents

Largeur variable d'un système de distribution du matériau pour des finisseuses et similaires Download PDF

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Publication number
EP0261093B1
EP0261093B1 EP19870850278 EP87850278A EP0261093B1 EP 0261093 B1 EP0261093 B1 EP 0261093B1 EP 19870850278 EP19870850278 EP 19870850278 EP 87850278 A EP87850278 A EP 87850278A EP 0261093 B1 EP0261093 B1 EP 0261093B1
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EP
European Patent Office
Prior art keywords
section
outboard
inboard
deflector plate
auger
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
Application number
EP19870850278
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German (de)
English (en)
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EP0261093A2 (fr
EP0261093A3 (en
Inventor
Andrew F. Craig
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.)
White Consolidated Industries Inc
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White Consolidated Industries Inc
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
Priority claimed from US06/907,655 external-priority patent/US4749304A/en
Priority claimed from US07/040,091 external-priority patent/US4772156A/en
Application filed by White Consolidated Industries Inc filed Critical White Consolidated Industries Inc
Publication of EP0261093A2 publication Critical patent/EP0261093A2/fr
Publication of EP0261093A3 publication Critical patent/EP0261093A3/en
Application granted granted Critical
Publication of EP0261093B1 publication Critical patent/EP0261093B1/fr
Expired legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
    • E01C19/42—Machines for imparting a smooth finish to freshly-laid paving courses other than by rolling, tamping or vibrating
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C2301/00—Machine characteristics, parts or accessories not otherwise provided for
    • E01C2301/14—Extendable screeds
    • E01C2301/16—Laterally slidable screeds

Definitions

  • This invention relates to an auger-like material distribution device for asphalt pavers and the like in which the auger-shaft includes an inboard section provided with an auger consisting of permanently mounted deflector plate means said auger-shaft also includes a telescoping outboard section which is axially adjustable with respect to the inboard section, as described in DE-B-1163356.
  • pavers of this type a paver tractor is advanced along the roadbed, typically pushing ahead of it a truck containing a supply of hot asphalt.
  • the hot asphalt material is conveyed to the back of the paver, by internal conveyor means, and deposited in front of the floating screed.
  • the paving material is distributed in front of the screed, and then leveled and smoothed by the advancing screed, as it travels over the just deposited asphalt material.
  • conventional floating screed pavers are provided with transversely disposed rotating auger-like distribution means, positioned directly in front of the screed.
  • the auger-like means serve to move the deposited asphalt material laterally, and to distribute it with some degree of uniformity in front of the advancing screed.
  • the transverse width of the auger-like means is approximately the same as the width of the screed, in order to assure distribution of the paving material to the extremities of the screed.
  • extension attachments for both the screed and auger facilities.
  • the paver is configured for minimum width.
  • extension attachments are mounted to the screed and to the auger-like distributor, to increase the paving width of the machine to meet the demands of the job.
  • the outboard section is provided with an auger consisting of permanently mounted deflector plate means which are shaped and sized to pass between or inter fit with said deflector plate means of the inboard section when said inboard and outboard sections are retracted to shorten the length of said auger-shaft, said deflector plate means of each telescoping outboard section thus being so related to the deflector plate means of an adjacent inboard section as to provide a lateral material distribution deflector plate configuration which is infinitely adjustable between the extended and retracted positions of said inboard and outboard sections.
  • the new arrangement represents a vast improvement in existing asphalt pavers with power variable screeds, in that under all conditions it is assured that there will be an effective distribution of the paving material laterally in front of the extended screed.
  • the power extendable material distribution mechanism of the invention is mounted and supported on the paver tractor, independently of the floating screed, so that the action of the screed is not affected by the variable reaction forces typically acting upon the distribution mechanism.
  • the power extendable distributor arrangement of the invention is comprised of telescopically associated augerlike sections, each containing a plurality of paddle-like deflector plate segments arranged to an angle to the rotational axis of the auger mechanism.
  • the various deflector segments optimally may be aligned to form a more or less continuous helix, although that is not necessary to the invention.
  • the deflector segments are distributed over the full length of the device and act with a high degree of effectiveness on the deposited paving material to provide a desired degree of uniformity in the distribution thereof out to the farthest reaches of the extended screed.
  • the power variable auger-like distributor mechanism of the invention is designed to be suitable for operation in the extremely hostile environment, such as that represented by hot asphalt material, in which the distributor mechanism is immersed or partially immersed during normal operations.
  • the asphalt material is hot and plastic, but it accumulates and hardnes over time, such that any mechanism operating in its environment must be rugged and dependable in construction, and have a measure of self-cleaning action to minimize the likehood of the mechanism being "frozen" by congealed asphalt.
  • the apparatus of the invention incorporates an advantageous form of telescoping material confinement panel structure, positioned in front of the telescoping distributor mechanism and extendable or retractable along with it.
  • the confinement panel works in cooperation with the screed to confine the deposited paving material, but in front of and behind the distributor mechanism, over its adjustably extended length.
  • the panel structure serves as an extendable guard, so that workmen are fully protected from accidental contact with the rotating distributor plates.
  • Another object of the present invention is to provide an outer support bearing with a bearing housing which is located at the extreme outer end of the telescoping auger assembly, so that when the auger is fully extended it is not necessary to push the paving material laterally out past the bearing and its housing in order to get the full width paving mat.
  • the regular auger had its outer bearing positioned about one foot inward from the extreme outer end.
  • the present telescoping auger is especially advantageous when utilized with a power extendible screed so that the operator, during operation, can alter the paving width, as well as the configuration, as desired. There is no requirement that the operation of the paving apparatus be halted while the operator makes changes or adjustments to either or both the auger and the screed.
  • Fig.1 is a side elevational view of a typical form of floating screed asphalt paver incorporating a power extendable material distributor mechanism according to the invention.
  • Fig. 2 is an enlarged view illustrating features of construction of the new power extendable distributor mechanism, showing the mechanism in a fully extended condition.
  • Fig. 3 is an enlarged, fragmentary, exploded view of the distributor mechanism of Fig. 2, illustrating the manner in which the respective sections thereof are telescopically assembled.
  • Figs. 4 and 5 are end elevational views of the respective parts illustrated in the perspective view of Fig. 3.
  • Fig. 6 is a cross sectional view taken on line 6-6 of Fig. 2, illustrating the parts of Figs. 4 and 5 in an assembled condition.
  • Fig. 7 is a cross sectional view as taken generally on line 7-7 of Fig. 2.
  • Fig. 8 is a fragmentary perspective view of a telescoping confinement panel structure for use in connection with the telescoping distributor arrangement.
  • Fig. 9 is an enlarged cross sectional view as taken generally on line 9-9 of Fig. 8.
  • Fig. 10 is a front elevational view of the telescoping panel arrangement, illustrating the confinement panel in its fully retracted condition.
  • Fig. 11 is an enlarged, fragmentary cross sectional view of a modified form of power extendable distributor arrangment suitable for use in the paver of Fig. 1.
  • Figs. 12-14 are illustrations of a second modified form of power extendable distributor structure incorporating principles of the invention, Figs. 12 and 14 illustrating the mechanism in extended and retracted positions respectively, and Fig. 13 representing a cross sectional view taken generally on line 13-13 of Fig. 12.
  • Figs. 15-17 are illustrations of a still further modified form of telescoping, power extendable distributor arrangement, with Figs. 15 and 17 showing the distributor in extended and retracted conditions respectively, and Fig. 16 representing an end elevational view thereof
  • Figs. 18 and 19 are illustrations of a still further modified form of power extendable distributor mechanism according to the invention, illustrating the distributor mechanism in extended and retracted conditions respectively.
  • Fig. 20 is an enlarged cross sectional view showing a further embodiment of an extendible distributor mechanism for a paving machine.
  • Fig. 21 is a fragmentary view of the distributor mechanism shown in Fig. 20 in which the respective inboard and outboard sections are telescopically assembled.
  • Fig. 22 is an end elevational view showing a distributor mechanism for a paving machine.
  • Fig. 23 is a sectional view in enlarged form taken along the lines 23-23 of Fig. 22.
  • Fig. 24 is a partial sectional and a partial elevational view of a deflector plate of the power extendible distributor mechanism showing the tongue and groove bolt-on casting for removably affixing a deflector plate to a central drive mechanism.
  • Fig. 25 is a view taken along the lines 25-25 of Fig. 24
  • Fig. 26 is a view taken along the lines 26-26 of Fig. 24, and
  • Fig. 27 is a front elevational view of a left hand paddle showing the channel-shaped casting for removable attachment to a central drive shaft.
  • the reference numeral 10 designates generally a typical form of floating screed type asphalt paver in which the features of the invention are incorporated.
  • the paver is self-powered by an engine 11 and has at its' forward end a load carrying hopper 12 for receiving hot asphalt paving material from a dump truck positioned directly in front of the paver.
  • the paver pushes the truck along the roadbed, with the truck continually discharging material into the hopper 12.
  • the paver continues paving, using the reserve of material contained in the hopper 12,while the new truck is brought into position in front of the paver.
  • a conventional paver includes internal conveyor means (not shown)which convey the hot asphalt material rearward, deposting it at the back of the paver tractor, as indicated at 13.
  • a power extendable screed 14 comprising a center screed section 15 and opposite side, laterally extendable screed elements 16, is attached to the paver tractor by means of tow arms 17 at each side.
  • the tow arms 17 are attached to the paver at tow points 18, which are vertically adjustable such that the angle of attack of the floating screed assembly 14 may be controllably varied during paving to maintain a level paving surface.
  • the power extendable screed structure may be in accordance with the before mentioned Brown U.S. Patent No. 4,379,653.
  • an auger-like material distributor mechanism Directly in front of the screed assembly 14 is an auger-like material distributor mechanism, generally designated by the reference numeral 19 and to be described in greater detail.
  • Asphalt material deposited by the conveyor means accumulates in a pile in front of the screed, in a relatively narrow area determined by the width of the conveyor means.
  • the distributor mechanism 19 conventionally is in the form of a rotating auger-like device, which serves to distribute the paving material 13 laterally outward toward the end extremities of the screed.
  • a paver includes left and right side distributors, arranged to distribute the paving material outward in both diretions from the center of the paving machine.
  • the opposite side distributor mechanisms 19 are telescopically extendable laterally such that, during paving, the length of the distributors may at all times properly correspond with the extended width of the screed 14.
  • Figs. 2-7 there are shown details of construction of a power extendable distributor mechanism used in the paver apparatus of Fig. 1.
  • left and right side distributor assemblies 19a, 19b are supported and driven, preferrably at the inboard ends, by means of a drive box 20, which is attached to and forms part of the paver tractor.
  • the drive box 20 includes drive means, typically chains and sprockets etc., for rotating the respective distributor shafts 21, 22, either independently or in unison, depending upon the control facilities provided.
  • details are shown of only the left-hand distributor assembly 19a, it being understood, of course, that the complementary, right side distributor is similarly constructed.
  • Support for the outboard end of the distributor 19a is provided by a bearing 23 carried by a vertically adjustable bearing bracket 24 rigidly attached to an outboard support arm 25.
  • the outboard support arm is itself supported by a relatively large diameter, telescoping tube assembly, generally designated by the reference numeral 26, which in the illustrated apparatus comprises three telescoping tubes, 27, 28 and 29.
  • the inboard tube 29 is mounted at its inner end adjacent the drive box 20 and is supported outboard of the drive box by means of a frame plate 30 forming part of the paver tractor frame.
  • the structure of the telescoping tubes is shown in more detail in Fig. 10.
  • the inboard tube 29 is shown to have an internal collar 31 secured to its open end, by means of an attached flange 32 bolted to a second flange 33 carried at the end of the tube 29.
  • the internal sleeve 31 serves as a slide bearing for the intermediate tube 28, which carries an external sleeve 34 at its inboard end.
  • the sleeve 34 serves as a bearing engaging the internal wall of the inboard tube 29.
  • considerable clearances are shown between the walls of the telescoping tubes and the bearing sleeves, in order to simplify understanding of the drawings. In actual practice, all of these parts will be constructed to have a relatively close sliding fit.
  • the intermediate tube 28 is similarly provided at its outboard end with an internal bearing sleeve 35 slideably supporting the outboard tube 27.
  • the latter at its inboard end, is provided with an external bearing sleeve 36.
  • the respective bearing sleeves 35, 36 function in the same manner as the bearing sleeves 31, 34, providing for a close sliding fit of the telescoping tubes 27, 28 and also serving to provide a limit stop for telescoping extension of the outboard tube 27.
  • Controlled extension and retraction of the telescoping support 26 is provided by means of a controllable hydraulic cylinder 37 anchored at its inboard end 38 and having an extendable actuator rod 39.
  • the outer end of the actuating rod 39 is attached to the outboard support plate 25, desirably in straddling relation to the adjustable bearing support 24, so as to be substantially aligned therewith.
  • the actuating rod 39 is attached to a bracket 40, which is bolted to the support plate 25 by a plurality of spacer bolts 41, arranged to straddle the bearing support 24.
  • the rotating distributor mechanism 19a includes inboard and outboard telescopically arranged distributor sections 50, 51.
  • the inboard distributor section 50 (see Figs. 3 and 4) comprises a series of three "square" tubular structural elements 52-54 arranged in side by side relation and secured together by linear welds 55 to form a unitary structure. At its inboard end, this assembly is attached to a drive coupling 56, through which the distributor section is driven from the drive box 20.
  • deflector plates or paddles 57 Mounted on the outer tube members 52, 54 are a series of deflector plates or paddles 57, alternate ones of which are positioned in staggered relation along the length of the inboard section, rotationally displaced by 180°. These deflector plates are secured to the tube members 52, 54 by welding, as at 58, and typically are in the form of a segment of a disc or circle, covering an angle of approximately 90°. As reflected in Figs. 3 and 4, the inner portions of the disc segments are removed and notches 59 are formed in the radially inner portions of the disc segments, such that the structural tube members 52, 54 are partly received therein, providing a highly secure mounting for the deflector plates. When assembled, the deflector segments form diametrically opposed 90° segments of a circular structure, the center of which is coincident with the axis of the center tube member 53, which is also the rotational axis of the distributor assembly.
  • each of the drive rails 60 has a radially inwardly facing drive surface 62, and these surfaces, on adjacent drive rails, form a dovetail-like slot arrangement.
  • the outboard distributor section 51 comprises a spaced pair of "square" tubular structural members 63, 64 joined together at their outboard ends by an end cap structure 65.
  • a "square" shaft 66 is secured at its outboard end to the end cap 65 and extends inward, between and in parallel relation to the tubular members 63, 64. The corners of the square shaft 66 have been removed, and the dimensions of the bar are otherwise suitable to be closely received within the interior of the central tubular member 53 of the inboard distributor section 50.
  • the outboard tubular structural members 63, 64 mount deflector plates 67, which are generally similar to the deflector plates 57 of the inboard distributor section, and are mounted on the tubular members 63, 64 in the same manner as the deflector plates 57 and secured by welding.
  • Pairs of triangular drive rails 68 are welded to the tubular members 63, 64 and extend lengthwise thereof over approximately the inner half of the tubular members (see Fig. 2).
  • the orientation of the drive bar 68 is such that the diagonal surfaces 69 thereof face generally radially outward from the central axis, with adjacent pairs of the drive rails being in the form of dovetail-like elements complementary to the dovetail-like elements formed by adjacent pairs of the drive rails 60.
  • the central drive shaft 66 is received internally of the central tube member 53, and the spaced apart tube members 63, 64 of the outboard unit straddle the central tubular member 53 of the inboard unit.
  • the inwardly facing drive rails 60 interfit with the outwardly facing drive rails 68, so that their respective diagonal surfaces are in facing/contacting relation. Because of the dovetail-like configuration, the inwardly facing drive rails serve to confine the outwardly facing drive rails, and thus position and confine the spaced tubular members 63, 64 which are otherwise secured only at their outer end extremities, by the cap member 65.
  • the respective inboard and outboard distributor sections mount their opposed sets of deflector plates 57, 67 with a 90° rotational displacement, such that the deflector plates of one section can be received within the open spaces provided by the deflector plates of the other section.
  • the sets of deflector plates can be so positioned and arranged on the respective distributor sections that, when the respective inboard and outboard sections are telescoped to a fully retracted or closed condition, the deflector plates generally align themselves in sequence to form a substantially continuous helix. It is by no means necessary to the invention, however, that the plates align themselves in any position to form a substantially continuous helix.
  • the respective deflector plates are arranged to provide some degree of clearance space 70 between adjacent deflector edges, whenever two plates are aligned, in order to facilitate one plate passing the other properly during telescopic extending and retracting movements.
  • the inboard distributor section 50 will, in normal operations of the paver, be driven through the inboard drive cap 56, from the main drive box 20.
  • the rotational motion of the inboard section is transmitted to the outboard section, in any operative position of extension or retraction, in part through the central drive shaft 66 and in part through the pairs of drive rails 60, 68.
  • the central drive shaft 66 transmits torque to the outboard end cap 65, and the cap imparts rotational motion to the outer ends of the outboard tubular structural members 63, 64.
  • Torque is also imparted to the inner portions of the tubular members 63, 64 through the action of the drive rails 60, 68, which cause the otherwise free ends of the tubular members 63, 64 to be confined by and rotationally carried with the tubular members 52-54 of the inboard distributor section.
  • the outboard distributor section 51 the latter is driven not only at its outboard extremity, but also over some extended inboard portion, depending upon the degree and location of overlap between the respective sets of drive rails 60, 68.
  • Adjustable positioning of the outboard distributor section 51 is accomplished, even during power operation of the distributor, by simply extending or retracting the fluid actuator 37. This serves to extend the outboard distributor section as well as the telescoping tubular support 26, which carries the outboard bearing bracket 24. Typically, separate left side and right side controls will be provided for the opposite side material distributors. These may be operated in unison with or independently of the power extension means for the screed sections 16. Normally, the distributors will be extended or retracted along with the screed extensions 16, but it may be desirable to provide for independent controls so that distributor extension, in relation to screed extension, may be an additional control variable available to the paver operator.
  • rotational speed of the distributor can be varied as a function of its length. Quite typically, however, rotational speed of the distributor is a function of the height of the paving material at or near the outboard end, under the control of a position sensing switch, such that any adjustment in rotational speed is automatically accommodated by the switch itself.
  • a confinement structure directly in front of the auger-like material distributor devices.
  • the deposited paving material is thus confined in front and behind the auger-like distributor, by means of the panel structure, in front, and the floating screed, in back.
  • a confinement panel structure is provided which extends or retracts along with the material distributor mechanism, such that the paving material is properly confined in any extended or retracted position of the distributor.
  • the extendable confinement panel structure is mounted on the same telescoping support arrangement that carries the outboard bearing bracket for the extendable distributor mechanism.
  • the extendable confinement panel also serves to provide a safety guard for the front side of the rotating distributor mechanism.
  • variable width confinement panel structure includes outboard, intermediate and inboard confinement panels 100-102, which are carried respectively by the outboard, intermediate inboard telescoping tubes 27-29.
  • the inboard guard panel 102 may be welded across its full top width to the inboard support tube 29 and extends over the exposed outer portion of that tube, from the frame plate 30 to the end flange 32.
  • the lower edge of the panel 102 is bent upward, at 103, to stiffen the panel and to provide a confining channel area 104 (see Fig. 9) for an adjacent panel.
  • a stiffening plate 105 which may be bolted or otherwise secured to the tractor frame plate 30 to rigidfy the structure.
  • the flange 33, welded at the outer end of the inboard support tube 29 is provided with a downwardly extending portion 106 (see Fig. 8) providing means for guiding and supporting portions of the adjacent, intermediate panel 101.
  • the intermedite panel 101 is secured to the intermediate support tube 28 is only by a narrow neck portion 107 adjacent the outer edge of the panel.
  • the inboard portions of the intermediate panel, along its entire upper edge 108 up the neck portion 107, are recessed as shown in Fig. 8 to provide a clearance underneath the larger diameter inboard support tube 29.
  • a flange 109 welded to the outer extemity to the intermediate support tube 28, has a portion 110 extending vertically downward for the full height of the intermediate panel.
  • the flange portion 110 is joined with the intermediate panel only in a short region 111 adjacent the neck 107, and again along a narrow area 112 where the lower edge extremity 113 of the intermediate panel is bent upward. Between these two extremities, where the panel 101 is welded to the stiffening flange 110, the latter is recessed (as at 114 in Fig. 9) to slideably receive and guide the outboard panel 100.
  • the outboard confinement panel is secured only along its outboard vertical edge, where it is welded to a downward extension 115 of the outboard support arm 125.
  • the lower edge extremity 116 of the outboard panel is folded over flat against the main surface of the panel forming a stiffening rib, which is received in an enlargement 117 of the recess 114 in the outer arm extension 115.
  • the bent-around lower end portions 103, 113 and 116 of the respective confinement panels 102, 101, 100 serve dual purposes. First, they stiffen and strengthen the lower end portions of the panels. Second, each provides a guide and confinement for the other to accommodate telescoping extending and retracting movements.
  • the free lower portion of the intermediate panel 101 is confined by the cooperative relationship between the upwardly bent lip portions 103, 113.
  • the otherwise free inner portion of the outboard panel 100 is guided and confined by the upwardly bent portion 113.
  • the folded-over portion 116 of the outboard panel serves to provide an increased bearing area and also provides structural stiffening.
  • Figs. 8 and 9 To guide and confine the free upper, inboard portion of the intermediate panel 101, an arrangement of guide bars is provided, which is shown particularly in Figs. 8 and 9. These are shown in the illustration with substantial clearance, in order to facilitate an understanding of the structure. In the actual device the parts will be constructed to provide reasonably close sliding fits.
  • first guide housing plate 120 is welded along its top edge to the tube 29 and along its outboard edge to the support flange 106.
  • the housing plate 120 is parallel to but spaced forward of the fixed, inboard confinement plate 102.
  • a guide bar 121 is welded to the lower margin of the housing plate 120, along its inside lower edge.
  • An intermediate guide bar 122 is welded to the intermediate guard plate 101 through an interposed spacer bar 123 which in turn is welded directly to the surface of the intermediate panel. As shown in Fig. 9, the upper portion of the intermediate panel 101 is confined on the back side by the fixed inboard panel and on the front side by the cooperating of the front surface of the guide bar 122 with the back surface of the housing plate 120. The confronting surfaces of the respective guide bars 121, 122 serve to provide vertical support for the intermediate plate.
  • the guide bar 122 extends downward, substantially below the lower edge of the spacer bar 123, providing a downwardly opening guide slot 124 adapted to receive the upper edge margin of the outboard confinement panel 100.
  • the extendable confinement panel structure is shown in Fig. 8 in a fully extended condition and in Fig. 10 in a fully retracted condition.
  • the construction of the extendable panel is simple and effective, yet extremely rugged and suitable for the heavy duty service to which equipment of this type is subjected. It is not intended, of course, that the extendable confinement panel structure function as a screed or strike-off, but it nevertheless must be capable of withstanding relatively severe abuse because of the nature of the intended service.
  • the extendable confinement panel is effectively an integral part of the power extendable distributor structure.
  • the power extendable panel arrangement might be utilized to advantage even with a conventional paver device such as the type utilizing movable auger means mounted on a variable width strike-off, for example, or even for use where bolt-on auger extensions are used.
  • the use of a power extendable confinement panel would minimize opportunities for job-site workmen to create an unsuitable operating condition by reason of their failure to bolt on a panel extension, for example, when attaching a distributor extension.
  • the inboard and outboard auger-like distributor sections are constructed with a different form of drive rail configuration.
  • the inboard section includes three structural tubular members 152-154 welded together in a common plane and otherwise constructed in a manner similar to the inboard distributor section 50 previously described.
  • the Fig. 11 modification employs a simple guide bar 200 on the forward-rotating side of each of the tubular members 152, 154, and an L-shaped guide bar 201 on the trailing side of those tubular members (assuming a clockwise direction of rotation as viewed in Fig. 11).
  • the outboard distributor section 151 comprises a spaced pair of tubular structural members 163, 164 corresponding generally to the members 63, 64 of the first described embodiment.
  • the tubular members 163, 164 have welded to their inside surfaces elongated drive plates 203 which extend lengthwise of the distributor section and have leading and trailing edge margins 204, 205 projecting laterally beyond the side edges of the tubular members.
  • the drive rail arrangement of the Fig. 11 embodiment is somewhat simpler and less expensive to construct that the arrangement of the principal described embodiment, although the latter is perhaps functionally superior.
  • a power extendable distributor arrangement in which deflector plates cover an arcuate segment of approximately 180°. Accordingly, all of the segments of one orientation are mounted on the outboard distributor section, while all of the plates of the opposite orientation are mounted on the inboard distributor section.
  • An end cap structure 300 is provided, having a shaft projection 301 for attachment to the drive box mechanism 20 of the paver. From one side of the inboard end cap 300 projects an internal bar or shaft 302 while on the opposite side of the axis there extends a hollow tubular member 303.
  • the outboard distributor section 351 is substantially a mirror image of the inboard section 350, having an outboard end cap 304 mounting in parallel relation a bar or shaft 305 and a tubular structural member 306.
  • a shaft projection 307 is arranged for reception in the outboard bearing member of the basic apparatus as heretofore described.
  • Each of the bar members 302, 305 is telescopically received within the tubular member 306, 303 of the opposite distributor section.
  • a series of semicircular helical segments 308 which, in the illustrated arrangement, are provided with spacer sleeves 309.
  • a plurality of semicircular paddle-like deflector segments may be welded along the length of the tubular members to provide "semi helix".
  • the structure In the position of full retraction of the distributor mechanism, as shown in Fig. 14, the structure is substantially equivalent to a conventional auger, with helix-like material deflector means.
  • the half sections are functional at the inboard and outboard extremes, and there typically is some overlap of auger segments in the intermediate section.
  • a form of telescopically extendable distributor in which the individual deflector plate segments 405-409 are of semicircular projected configuration (Fig. 16) and in which each of several telescoping segments 401-404 contains two such 180° segments, one disposed at a relatively large acute angle to the shaft axis, and the other being disposed at a relatively smaller acute angle.
  • the arrangement is such that, when the telescoping sections are extended, there is functional overlap between adjacent 180° sections that are disposed at the smaller angle to the auger axis.
  • functional overlap it is meant that the auger segments are either physically overlapped as shown in Fig. 15, or if not physically overlapped, at least sufficiently close together that paving material is transferred from one auger section to the next and thus is effectively continuously advanced outwardly by rotation of the auger mechanism.
  • each of a plurality of distributor sections 502 is spirally retracted upon an adjacent section, providing a generally continuous helix of double thickness, as shown in Fig. 18.
  • each of the illustrated distributor segments 501 consists of approximately 720° of spiral.
  • the middle 360° portion is secured, as by welding, to a tubular sleeve section 503, while a 180° portion 504 on each end is supported in cantilever fashion.
  • Each segment has a shaft portion 504, which telescopes into the adjacent tubular section 503.
  • the rotating distributor mechanism referred to generally by the numeral 620 includes inboard and outboard telescoping distributor sections referred to generally by the numerals 622 and 624, respectively.
  • the inboard distributor section 622 comprises a series of three rectangular-shaped structural members 626, 628 and 630 arranged in side by side relation and secured together by welds to form a unitary structure. At its inboard end this assembly is attached to a drive mechanism (not shown) through which the inboard section is rotated.
  • outer tubular members 626 and 630 Mounted on outer tubular members 626 and 630 are reflector plates of paddles 632, 634, respectively. It should be evident that the plate 632, 634 is a full length auger paddle while plate 635 is a kickback paddle.
  • the paddles 632, 634 are positioned in staggered relation along the length of the inboard section and rotationally displaced by 180° degrees, thus, when assembled, the deflector plates formed diametrically opposed 90 degree segments of a circular structure, the center of which is coincident with the axis of the center tube member 628, which is also the rotational axis of the distributor assembly.
  • the outboard distributor section 624 comprises tubular structural members 636 and 638 welded or otherwise secured to an end plate (not shown) and to a shaft 629 which telescopes within center tube member 628 in a plane at right angles to the mounting plane of tubular members 626 and 630.
  • a cover shield 654 is shown in Figs. 22 and 23 for the inner bearing assembly 655.
  • the tubular structural members 636 and 638 slide along tube 628 in order to assume an extended position but are not attached to tube 628. Consequently, the outboard distributor section, when extended, is cantilevered with respect to the inboard distributor section 622.
  • the outboard tubular structural members 636 and 638 mount the deflector plates or paddles 640 and 642, respectively, which are generally similar to the deflector plates 632, 634 of the inboard distribution section, except that deflector plate 640 is the end paddle of the outer section, while deflector plate 642 is a full length auger paddle of the outer section.
  • deflector plate 640 is the end paddle of the outer section
  • deflector plate 642 is a full length auger paddle of the outer section.
  • the end casting 647 is shorter than the other castings. However, there is no change in effect by using the shorter casting on the auger.
  • the inboard and outboard distributor sections 622 and 624 have opposing deflector plates with a 90 degree rotational displacement so that the opposing deflector plates in one of the sections can be slid into and received in the open spaces 644 between opposing deflecting plates of the other section.
  • the auger configuration is that of a substantially continuous helix.
  • there is a clearance 644a between the adjacent edges of the deflector plates so that there is no interference between the deflector plates of the outboard and inboard sections 622 and 624, respectively, during outboard telescoping and inward retracting movements thereof.
  • the deflector plates of both the inboard and outboard distributor sections 622 and 624 are provided with bolt-on castings 646 in the form of an inverted channel-shaped members, as clearly seen in Figs. 24-27 of the drawings.
  • Castings 646 are provided with holes 648 in the front and rear thereof trough which bolts 650 can be inserted and nuts 652 affixed thereto, thus, removably securing each of the deflector plates to the respective tubular structural members adjacent thereto. Consequently, the inverted channel-shaped connecting members are interconnected to each other in a tongue and groove arrangement, as seen in Fig. 20.
  • each of the channel-shaped connecting members are provided with an extension 646a which will push against flange 646b of the adjacent channel-shaped connecting member, while the other leg of each channel-shaped member is provided with a flange 646b which interconnects with the projection 646a of the adjacent channel-shaped member to form a tongue and groove interlocking construction about the entire assembly of tubular structural members.
  • the tongue and groove arrangement also functions to assist in supporting any side loads exerted on the cantilevered portions of the two tubes 636 and 638 of the outboard distributor section 624. It should be apparent that upon breakage of any individual deflector plates or paddle, in the present material distribution assembly, and the same can be removed from the distribution assembly and replaced rapidly and effectively with another paddle or deflector plate segment.
  • the replaceable paddle or deflector plate are each provided with an inverted channel member having one leg provided with an extension 646a while the other leg is provided with a flange 646b.
  • the inverted channel 646 is also provided with aligned holes 648 through which a bolt and nut attachment is made to the respective outer and inner distributor section, especially structural members 626 and 630, as well as structural members 636 and 638.
  • a central drive shaft 629 of the inboard section 622 imparts rotational movement to the outboard section 624 in any extended or retracted position of the outboard section by means of the driving connection between the rotating drive shaft 629 which closely interfits within the center rectangular-shaped tube member 628.
  • a drive means may rotate both inboard and outboard telescoping distributor sections in either extended or retracted modes.
  • the apparatus of the invention represents a significant advance in the construction of material distributor mechanisms, for asphalt paving machines in particular, because of the active need and desirability for variable width paving and/or the need or desirability of power extendable/retractable paving equipment, giving the equipment the capability of occasional utilization for variable width paving requirements.
  • variable width paving has been accomplished principally with the use of power extendable screed and strike-off arrangements.
  • the previously known equipment while far superior to conventional fixed width equipment, nevertheless has suffered from the disadvantage that the guard-like material distribution facility has not been extendable and retractable along with the screed.
  • the Fisher et al. U.S. Patent No. 3,907,451 falls far short of achieving such a purpose.
  • the auger-like distributor there in fact is no provision for extending or retracting the auger-like distributor. Rather, the auger is merely repositioned so as to cooperate with the outboard areas of the screed or strike-off. This tends to satisfy one need at the expense of another (the center area). Additionally, the movable auger arrangement is mounted on the screed or strike-off itself, such that the significant and highly variable reaction forces on the auger are necessarily imparted to the screed, having a potentially undesirable effect upon the smoothness of the pavement mat.
  • the power extendable distributor mechanism is mounted directly by the paver tractor, and not by the screed.
  • the screed is isolated from both the weight and the reaction forces of the auger.
  • separate mounting of the extendable distributor mechanism allows for independent control of distributor extension vis-a-vis screed extension, so that an additional control capability is available to the paver operator.
  • a telescoping cantilever support structure which provides outboard bearing support for the rotating, extendable material distribution device, also mounts a telescoping panel structure providing a material confinement means on the front side of the distributor.
  • the panel structure is formed of a plurality of overlapping, flat panels, carried by the telescoping members of the bearing support and extendable and retractable along with the material distribution device.
  • the structure of the invention greatly enhances the performance of paving equipment with power extendable screed facilities by assuring that the lateral distribution of paving material will always be properly related to the extended width of the screed.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)

Claims (13)

  1. Dispositif à vis sans fin de distribution de matériau pour finisseuses et similaires, où l'arbre à vis comporte une section intérieure (50) munie d'une vis sans fin constituée d'éléments déflecteurs (57) montés en permanence, où ledit arbre à vis comporte également une section téléscopique extérieure (51), qui est ajustable axialement par rapport à la section intérieure, caractérisé en ce que la section extérieure (51) est pourvue d'une vis sans fin constituée d'éléments déflecteurs ( 67 ) , qui ont une forme et une taille telles qu'ils passent entre, voire s'intercalent entre lesdits éléments déflecteurs (57) de la section extérieure (50) , lorsque lesdites sections intérieure et extérieure sont rétractées de façon à réduire la longueur dudit arbre à vis, lesdits éléments déflecteurs (67) de chacune des sections téléscopiques extérieures (51) étant ainsi positionnés par rapport aux éléments déflecteurs d'une section intérieure adjacente (50) de façon à constituer une configuration de déflecteurs de distribution latérale du matériau, qui est ajustable infiniment entre les positions étendue et rétractée desdites sections intérieure et extérieure.
  2. Dispositif selon la revendication 1, caractérisé par un dispositif support permettant le maintien, de façon libre en rotation, de l'extrémité intérieure de ladite section intérieure (50), ladite section extérieure (51) étant reliée à ladite section intérieure de telle sorte que l'une entraîne l'autre en rotation simultanée, et par un dispositif support téléscopique (26) d'un palier, monté en porte-à-faux, qui s'étend latéralement vers l'extérieur, à proximité desdites sections de distribution du matériau, ledit dispositif support (26) du palier comprenant au moins un élément extérieur (27), extensible et rétractable téléscopiquement, un dispositif palier (23), porté par ledit dispositif support (26) du palier et maintenant, de façon libre en rotation, la partie extérieure de ladite section extérieure (51), et par un dispositif (37) de commande assistée réglable, permettant d'étendre et de rétracter ledit élément extérieur (27) et ladite section extérieure (51).
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que l'une des sections (50) comporte une série de trois éléments porteurs allongés tubulaires (52, 53, 54) , fixés ensemble côté à côte et portant des premiers dispositifs déflecteurs (57), qui sont montés sur les éléments porteurs situés radialement à l'extérieur et s'étendent en arcs de cercles d'un angle inférieur ou égal à environ 90°, l'autre section (51) comportant un arbre central (66) s'engageant téléscopiquement, et de façon à transmettre le mouvement, dans l'élément porteur central (53) de la section extérieure (51) qui, par ailleurs, comporte une paire d'éléments porteurs tubulaires espacés (63, 64) , montés en porte-à-faux sur l'extrémité extérieure dudit arbre central (66) et positionnés de façon à enfourcher étroitement ledit élément porteur central (53) entre les pales du premier dispositif déflecteur (57), un deuxième dispositif déflecteur (67) étant monté sur lesdits éléments porteurs tubulaires (63, 64), dans la zone d'arc comprise entre les pales du premier dispositif déflecteur, de façon à admettre le mouvement relatif entre des différents jeux de dispositifs déflecteurs passant l'un à côté de l'autre.
  4. Dispositif selon l'une des revendications 2 à 3, caractérisé par un ensemble téléscopique extensible d'un panneau de retenue, monté sur le dispositif support (26) du palier et positionné devant les sections (50, 51) de distribution du matériau, l'ensemble du panneau comprenant une série de panneaux coulissants chevauchés (100, 101, 102), qui sont placés à proximité des sections de distribution du matériau et sont extensibles et rétractables avec ces dernières.
  5. Dispositif selon l'une des revendications 3 à 4, caractérisé en ce que les dispositifs d'entraînement comprennent des paires d'éléments longilignes (60) en forme de rails, qui sont montés sur les éléments porteurs (52, 54) de l'une des sections (50) de façon à s'engager, en coulissant, sur des éléments longilignes conjugués (68) d'entraînement, qui sont montés sur les éléments porteurs (63, 64) de l'autre section (51).
  6. Dispositif selon la revendication 5, caractérisé par des paires d'éléments (60) en forme de rails adjacents, qui forment une liaison en queue d'aronde permettant d'entraîner et de tenir les extrémités libres desdits éléments porteurs espacés (63, 64).
  7. Dispositif selon l'une des revendications 1 à 6, caractérisé par ladite machine finisseuse qui comprend un tracteur automoteur et une règle à niveler flottante (14) de largeur variable, ledit dispositif (19) de distribution du matériau étant monté sur ledit tracteur et étant indépendant de la structure de ladite règle flottante.
  8. Dispositif selon la revendication 1, caractérisé en ce que le dispositif comprend une série de parties (401, 402, 403) en forme de vis, chacune de ces parties portant un premier et un deuxième dispositif déflecteur (405 - 408), couvrant chacun un arc d'environ 180°, l'un desdits dispositifs déflecteurs (405, 407) étant disposé à un angle relativement ouvert par rapport à l'axe du dispositif, et l'autre (406, 408) étant disposé à un angle relativement fermé par rapport audit axe, et les pales des déflecteurs des sections adjacentes de la vis sans fin étant orientées de façon à être complémentaires les unes des autres, de sorte que, du même côté du dispositif, se trouvent des pales du premier type et des pales du deuxième type en ordre alterné.
  9. Dispositif selon la revendication 1, caractérisé en ce que le dispositif déflecteur (501) a une configuration en forme d'hélice couvrant un angle supérieur à 360°, des parties du dispositif déflecteur étant montées en porte-à-faux et étant agencées de manière à se caler contre des parties d'un dispositif déflecteur hélicoïdal (504) adjacent lorsque ledit dispositif est rétracté.
  10. Dispositif selon l'une des revendications 4 à 9, caractérisé en ce que le bord inférieur (116) des panneaux est replié vers le haut de façon à former une goulotte de guidage recevant la partie inférieure d'un panneau mobile adjacent.
  11. Dispositif selon la revendication 1, caractérisé en ce que chaque dispositif déflecteur est pourvu d'un système de liaison à languette et rainure (646a, 646b), qui se conjugue avec un dispositif déflecteur adjacent lorsque ledit dispositif téléscopique de distribution du matériau est en position rétractée ou partiellement déployée.
  12. Dispositif selon la revendication 11, caractérisé en ce qu'il comporte une série d'éléments porteurs tubulaires rectangulaires (630, 636) , le système de liaison à rainure et languette comprenant un élément (646) en U pourvu d'un moyen (648) permettant sa fixation, de façon démontable, sur ces éléments.
  13. Dispositif selon la revendication 12, caractérisé en ce que l'élément d'entraînement (646) en forme de U est pourvu de trous espacés (648), et qu'il y a des trous espacés alignés réalisés dans les éléments porteurs rectangulaires adjacents (630, 636), permettant de fixer, de façon démontable, lesdites pales de déflecteur sur un arbre central (628) d'entraînement.
EP19870850278 1986-09-15 1987-09-10 Largeur variable d'un système de distribution du matériau pour des finisseuses et similaires Expired EP0261093B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US907655 1986-09-15
US06/907,655 US4749304A (en) 1986-09-15 1986-09-15 Variable width material distribution system for asphalt pavers and the like
US40091 1987-04-20
US07/040,091 US4772156A (en) 1987-04-20 1987-04-20 Telescoping auger construction for paving machines

Publications (3)

Publication Number Publication Date
EP0261093A2 EP0261093A2 (fr) 1988-03-23
EP0261093A3 EP0261093A3 (en) 1988-10-19
EP0261093B1 true EP0261093B1 (fr) 1991-07-17

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EP19870850278 Expired EP0261093B1 (fr) 1986-09-15 1987-09-10 Largeur variable d'un système de distribution du matériau pour des finisseuses et similaires

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EP (1) EP0261093B1 (fr)
DE (1) DE3771426D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5279501A (en) * 1992-06-15 1994-01-18 Caterpillar Paving Products Inc. Screw conveyor
US12000096B2 (en) 2021-02-02 2024-06-04 Caterpillar Paving Products Inc. Auger segment and systems, assemblies, and methods thereof

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Publication number Priority date Publication date Assignee Title
BE1008262A6 (nl) * 1994-04-19 1996-02-27 Casters Francois Verbeteringen aan betonnivelleermachines.
CN102154972A (zh) * 2011-04-25 2011-08-17 长沙中联重工科技发展股份有限公司 螺旋节、主节段、用于摊铺机的螺旋分料装置和摊铺机
CN112726364B (zh) * 2021-01-25 2022-03-01 杨杰 一种沥青混凝土均匀摊铺装置
CN113585001A (zh) * 2021-07-26 2021-11-02 徐工集团工程机械股份有限公司道路机械分公司 一种伸缩式分料轴及摊铺机
CN115262336B (zh) * 2022-09-28 2022-12-30 长沙理工大学 一种在颗粒路面铺面用的分流式铺摊机

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DE1775252U (de) * 1958-07-12 1958-10-09 Holl Bauunternehmung Geb Vorrichtung an strassenbaumaschinen zur herstellung bituminoeser belaege.
US3015258A (en) * 1959-11-27 1962-01-02 Jaeger Machine Co Paving material spreader
US3130654A (en) * 1961-08-31 1964-04-28 Jaeger Machine Co Material distributing and leveling machine
US3907451A (en) * 1974-01-28 1975-09-23 Lay Mor Manufacturing Company Extensible screed and auger assembly for a road paving machine
DE7412802U (de) * 1974-04-11 1978-11-23 Fa. Klaus-Gerd Hoes, 2900 Oldenburg An der rueckseite eines strassenfertigers angeordnete vorrichtung zum verteilen von strassenbaustoff

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5279501A (en) * 1992-06-15 1994-01-18 Caterpillar Paving Products Inc. Screw conveyor
US12000096B2 (en) 2021-02-02 2024-06-04 Caterpillar Paving Products Inc. Auger segment and systems, assemblies, and methods thereof

Also Published As

Publication number Publication date
DE3771426D1 (de) 1991-08-22
EP0261093A2 (fr) 1988-03-23
EP0261093A3 (en) 1988-10-19

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