WO2018136049A1 - Dispositif de serrage d'élément chauffant de finisseur - Google Patents

Dispositif de serrage d'élément chauffant de finisseur Download PDF

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Publication number
WO2018136049A1
WO2018136049A1 PCT/US2017/013916 US2017013916W WO2018136049A1 WO 2018136049 A1 WO2018136049 A1 WO 2018136049A1 US 2017013916 W US2017013916 W US 2017013916W WO 2018136049 A1 WO2018136049 A1 WO 2018136049A1
Authority
WO
WIPO (PCT)
Prior art keywords
bolts
flange
bracket
section
asphalt
Prior art date
Application number
PCT/US2017/013916
Other languages
English (en)
Inventor
Siddartha REDDY
Original Assignee
Volvo Construction Equipment Ab
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 Volvo Construction Equipment Ab filed Critical Volvo Construction Equipment Ab
Priority to PCT/US2017/013916 priority Critical patent/WO2018136049A1/fr
Publication of WO2018136049A1 publication Critical patent/WO2018136049A1/fr

Links

Classifications

    • 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
    • E01C19/48—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 laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/02—Details
    • H05B3/06—Heater elements structurally combined with coupling elements or holders
    • 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
    • E01C2301/10—Heated screeds

Definitions

  • the present invention relates to a screed heating element clamp.
  • Asphalt pavers are typically provided with a heated screed plate that levels the asphalt during the asphalt paving process.
  • the present invention is directed at an improved system for holding the heating element to the screed plate.
  • an asphalt paver comprises an asphalt screed, at least one heating element, at least one bracket, and a plurality of bolts.
  • the asphalt screed is provided with a bottom end that includes a lower frame section releasably secured to a screed plate and top end that includes an upper frame section that defines a plurality of bores.
  • the at least one heating element is located on the screed plate.
  • the plurality of bolts are received by the plurality of bores so that heads of the plurality of bolts are located at the top end of the asphalt screed and generate a clamp load that is applied to the at least one bracket to clamp the at least one heating element between the at least one bracket the screed plate.
  • a method for clamping at least one heating element to a screed plate of an asphalt paver that includes, an asphalt screed provided with a bottom end that includes a lower frame section releasably secured to a screed plate and a top end that includes an upper frame section that defines a plurality of bores, a plurality of bolts, and at least one bracket, comprises the steps of locating the at least one heating element on the screed plate, inserting the plurality of bolts into the plurality of bores so that heads of the plurality of bolts are located at the top end of the asphalt screed, tightening the plurality of bolts to generate a clamp load that is applied to the at least one bracket to clamp the at least one heating element between the at least one bracket and the screed plate.
  • an asphalt paver comprises an asphalt screed, at least one heating element, at least one bracket, and a plurality of bolts.
  • the asphalt screed is provided with a lower frame section releasably secured to a screed plate and an upper frame section that defines a plurality of bores.
  • the at least one heating element is located on the screed plate.
  • the plurality of bolts are received by the plurality of bores and generate a clamp load that is applied to the at least one bracket to clamp the at least one heating element between the at least one bracket the screed plate.
  • an asphalt paver includes:
  • an asphalt screed provided with a bottom end that includes a lower frame section releasably secured to a screed plate and a top end that includes an upper frame section that defines a plurality of bores;
  • At least one heating element located on the screed plate
  • the asphalt paver further includes a plurality of bolt clamping assemblies that include the plurality of bolts and a plurality of flanges that apply the clamp load to the at least one bracket and are releasably secured to lower ends of the bolts.
  • the plurality of bolt clamping assemblies further include a plurality of flange bolts provided with external threads that cooperate with internal threads located at the lower ends of the plurality of bolts to releasably secure the flanges to the lower ends of the bolts.
  • the asphalt paver further includes a plurality of bolt clamping assemblies that include the plurality of bolts and a plurality of flanges releasably secured to lower ends of the bolts, wherein:
  • the plurality of flanges include first flange sections, second flange sections, and undercut sections located between the first and second flange sections;
  • the at least one bracket defines a plurality of flange keyways that receive the plurality of flanges and include enlarged cutout sections and reduced cutout sections;
  • the enlarged cutout sections including widths that are greater widths of the second flange sections and the undercut sections and less than widths of the first flange sections;
  • the reduced cutout sections include widths that are greater than the widths of the cutout section and less than the widths of the first and second flange section; and the reduced cutout sections receive the undercut sections so that the brackets are interposed between the first and second flange section.
  • a method for clamping at least one heating element to a screed plate of an asphalt paver that includes an asphalt screed provided with a bottom end that includes a lower frame section releasably secured to a screed plate and an top end that includes an upper frame section that defines a plurality of bores, a plurality of bolts, and at least one bracket, includes the steps of:
  • the paver further includes a plurality of bolt clamping assemblies that include the plurality of bolts and a plurality of flanges and the method further includes the steps of releasably securing the flanges to bolts after the bolts are inserted into the bores and using the flanges to apply the clamp load to the at least one bracket as the plurality of bolts are tightened.
  • the plurality of bolt clamping assemblies further include a plurality of flange bolts provided with external threads and the plurality of bolts include internal threads located at the lower ends of the plurality of bolts and the method further includes the step of using the external threads on the plurality of flange bolts to cooperate with the internal threads on the plurality of bolts and releasably secure the plurality of flanges to the lower ends of the plurality of bolts.
  • the paver further includes a plurality of bolt clamping assemblies that include the plurality of bolts and a plurality of flanges that include a first flange section, a second flange section, and an undercut section located between the first and second flange sections and the at least one bracket defines a plurality of flange keyways that include enlarged cutout sections and reduced cutout sections and the method further includes the steps of:
  • the method further includes the step of using the flanges to support the bracket in a spaced relationship from the heating element before the clamp load is applied.
  • an asphalt paver includes:
  • an asphalt screed provided with a lower frame section releasably secured to a screed plate and an upper frame section that defines a plurality of bores;
  • At least one heating element located on the screed plate
  • Figure 1 shows an asphalt paver according to one embodiment.
  • Figure 2 shows a top perspective view of an asphalt screed according to one embodiment.
  • Figure 3 shows a top perspective sectional view of an asphalt screed according to one embodiment.
  • Figure 4 shows a side perspective view of a clamping assembly according to one embodiment.
  • Figure 5 shows a sectional view taken along A-A in Figure 2 of an asphalt screed according to one embodiment.
  • Figure 6 shows a sectional view taken along A-A in Figure 2 of an asphalt screed according to one embodiment.
  • Figure 7 shows a sectional view taken along A-A in Figure 2 of an asphalt screed according to one embodiment.
  • Figure 8 shows a sectional view taken along A-A in Figure 2 of an asphalt screed according to one embodiment.
  • the asphalt paver 15 is configured to receive, deposit, and level asphalt mix 5 to at least partially form an asphalt pavement 7 on top of a paving surface 6.
  • the asphalt paver 15 may be provided with an asphalt hopper 20, an asphalt conveyor 25, and an asphalt spreader 30.
  • the asphalt paver includes an asphalt screed 40 that is supported by tow arms, as at 35, and is provided with an asphalt leveling surface 45.
  • the asphalt paver 15 may also be provided with at least one vertically reciprocating tamper (not shown) located forward of the asphalt leveling surface 45.
  • asphalt mix 5 is typically loaded onto the paver 15 and temporarily held in an asphalt hopper, such as asphalt hopper 20.
  • asphalt conveyors such as asphalt conveyor 25 typically transport the asphalt mix 5 from the asphalt hopper 20 and deposit it on a paving surface, such as paving surface 6, whereat one or more asphalt spreaders, such as asphalt spreader 30, which may be in the form of one or more augers, as shown, spread the asphalt mix 5 on the paving surface 6 in a direction that is lateral with respect to a direction of travel of the paver 15.
  • FIGS. 5-8 an example of an asphalt screed 40 according to one embodiment is illustrated.
  • a lower frame section 44a releasably secured to screed plate 41.
  • the asphalt leveling surface 42 Located on the underside of the screed plate 41 is the asphalt leveling surface 42.
  • the screed plate 41 is also provided with an upper side surface 43 opposite the asphalt leveling surface 45.
  • the upper side surface 43 typically includes a plurality of threaded studs, as at S, that cooperate with nuts, as at N, to releasably connect the screed plate 41 to the lower frame section 44a.
  • the asphalt screed 40 is also provided with a top end 40a, opposite the bottom end 40b, that includes an upper frame section 44b having an underside surface 45 and an upper side surface 46 opposite the underside surface 45.
  • the upper side surface 46 is oriented to face towards an exterior 40b of the asphalt screed 40.
  • the underside surface 45 is oriented to face towards the upper side surface 43 of the screed plate 41.
  • the interior 40a of the asphalt screed 40 is defined between upper frame section 44b and the screed plate 41.
  • the upper frame section 44b is configured to receive a plurality of threaded bolts 80 provided with a head 81 that is configured to receive torque and rotate the bolt.
  • the head is located at the top end 40aof the asphalt screed 40.
  • the upper frame section 44b defines a plurality of bores 47 that extend between the underside surface 45 and the upper side surface 46.
  • the bores 47 receive the plurality of bolts 80, which are inserted into the bores 47.
  • the bolts 80 are provided with an external surface that is at least partially threaded, as at 81.
  • the upper end 80a of the bolts 80 may be threaded as at 81 and the external surface at the lower end 80b of the bolts 80 may be unthreaded.
  • the upper frame section 44b may include a plurality of threads, as at 45a.
  • the bores 47 may include a plurality of threads, as at 45a.
  • the interior 40d of the asphalt screed 40 may include a plurality of threads, as at 45b.
  • the threads 82 mate with threads, such as, for example, threads 45a or 45b.
  • the bolt 80 eventually extends from the top side 40a to the bottom side 40b of the asphalt screed 40 and exerts a clamp load that is applied to at least one bracket 60.
  • the clamp load applied to the bracket 60 clamps at least one heating element 70 between the bracket 60 and the upper side surface 43 of the screed plate 41 and holds the at least one heating element 70 in place.
  • the head 81 is externally located, relative to the interior 40d of the asphalt screed 40, which allows for readily accessibility to the heads 81 on bolts 80 along at top end 40a of the asphalt screed 40 for purposes of clamping and unclamping the one or more heating elements 70 to the screed plate 41 so that heat can be applied to the screed plate 41.
  • clamping the one or more heating elements 70 to the screed plate 41 allows for heating of the screed plate 41 during a paving operation which assists in the prevention of asphalt mix cooling and adhering to the screed plate 41.
  • the bolts 80 are a component of a plurality of bolt clamping assemblies 75 (FIG. 4) that further include flanges 90.
  • the flanges 90 are releasably secured to lower ends 80b of the bolts 80.
  • the flanges 90 may be releasably secured to the lower end 80b of the bolts 80 in numerous ways.
  • the lower end 80b of the bolts may be threaded and may cooperate with a nut (not shown) or a threaded flange (not shown) to releasably secure the flange at the lower end 80b of the bolts 80. As shown best in FIGS.
  • the preferred bolt 80 of clamping assemblies 75 is provided with threads, such as internal threads at 83, which releasably secure a flange 90 to the bolt 80.
  • the internal threads 83 are located in a cavity 84 that extends from a lower end 80b of the bolt 80.
  • a flange bolt 87 includes external threads, as at 89, may cooperate with the internal threads 83 of bolt 80 to releasably secure the flange 88 at the lower end 80b of the bolt 80.
  • the flange bolt 87 includes a head 88 and as shown in FIG. 4, when the clamping assembly 75 is assembled the flange bolt 87 extends through a central bore 90a of the flange
  • the flange 90 and the flange 90 is located between the head 88 of the flange bolt 87 and the internal threads 83 of the bolt 80.
  • the flanges 90 apply the clamp load to the bracket 60.
  • the flanges 90 may support the bracket 60 in a spaced relationship from the heating element 70 before the clamp load is applied and then vertically lowered onto the heating element 70 after the heating element is properly on the screed plate 41.
  • the flange 90 includes at least one flange section 91 and preferably first and second flange sections 91, 92 and an undercut section 93. As shown the flange section 91 is located at an upper end of the flange 90, the second flange section 92 is located at a lower end of the flange 90, and the undercut section 93 is defines a groove 93a located between flange section 91 and second flange section 92.
  • the flange section 91 is provided with a width W2 that is greater than the width Wl of the bolt 80.
  • the enlarged width W2 of the flange section 91 increases the surface area of the clamp load applied to the brackets 60 by the flange section
  • the second flange section 92 is provided with a width W3 that measures less than the width W2 of the flange section 91 and the undercut section 93 is provided with a width W4 that measures less than widths W2 and W3.
  • the bracket 60 define a plurality of flange keyways 61 that receive the plurality of flanges 90 of the bolt clamping assemblies 75.
  • the each flange keyway 61 preferably includes an enlarged cutout section 62 and a reduced cutout section 63.
  • the enlarged width section is provided with width W5.
  • the width W5 measures greater than the width W3 of the second flange section 92.
  • the width W5 measures greater than the width W4 of the undercut section 93.
  • the width W5 measures less than the width W2 of the flange section 91.
  • the reduced cutout section 63 is provided with width W6.
  • the width W6 measures less than the width W5.
  • the width W6 measures less than the width W3 of the second flange section 92.
  • the width W6 measures greater than the width W4 of the undercut section 93.
  • the width W6 measures less than the width W2 of the flange section 91.
  • FIGS. 5-7 best illustrate, to connect the clamp assemblies 75 to the brackets 60, the flanges 90 move within the keyways 61 from the enlarged cutout section 62 to the reduced cutout section 63.
  • FIGS. 5-7 best illustrate, to connect the clamp assemblies to the brackets 60, the undercut section 93 of the flanges 90 moves within the keyways 61 from the enlarged cutout section 62 to the reduced cutout section 63.
  • the flanges 90 are inserted into the enlarged cutout section 62.
  • the second flange section 92 and undercut section are inserted into the enlarged cutout section 62.
  • the width W5 of the enlarged cutout section 62 receives the widths W3 of the second flange section 92 and the width W4 of the undercut section 93
  • the smaller width W5 of the enlarged cutout section 62 prevents the flange section 91 from entering or passing through the enlarged cutout section 62.
  • the bolts 80 having heads 81, which are easily accessible via the upper side surface 46 of the upper frame section 44b, may be tightened to lower the bracket 60 so that one or more heating elements 70 are clamped between the bracket 60 and the screed plate 41.
  • the clamp load generated by the bolts 80 is directed downwards towards the upper side surface 43 of the screed plate 41 to press and hold the heating element 70 into contact with the upper side surface 43 of the screed plate 41.
  • the clamp load will directly oppose and resists forces or vibrations tending to urge the heating element 70 away from the upper side surface 43.

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

Abstract

Selon l'invention, une asphalteuse comprend un finisseur d'asphalte, au moins un élément chauffant, au moins un support et une pluralité de boulons. Le finisseur d'asphalte comprend une section de cadre inférieure fixée de manière amovible à une plaque de finisseur et une section de cadre supérieure qui définit une pluralité d'alésages. Le ou les éléments chauffants sont situés sur la plaque du finisseur. Les plusieurs boulons sont reçus par la pluralité d'alésages et génèrent une charge de serrage qui est appliquée à l'au moins un support pour serrer le ou les éléments chauffants entre le ou les supports et la plaque de finisseur.
PCT/US2017/013916 2017-01-18 2017-01-18 Dispositif de serrage d'élément chauffant de finisseur WO2018136049A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2017/013916 WO2018136049A1 (fr) 2017-01-18 2017-01-18 Dispositif de serrage d'élément chauffant de finisseur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2017/013916 WO2018136049A1 (fr) 2017-01-18 2017-01-18 Dispositif de serrage d'élément chauffant de finisseur

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WO2018136049A1 true WO2018136049A1 (fr) 2018-07-26

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10662592B1 (en) 2019-01-31 2020-05-26 Caterpillar Paving Products Inc. Screed heating element holder
US11274404B2 (en) 2019-03-13 2022-03-15 Caterpillar Paving Products Inc. Retention apparatus for screed cover

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4474492A (en) * 1982-09-30 1984-10-02 Bestop/Dualmatic, Inc. Self-locking spare tire carrier latch
US4865500A (en) * 1986-11-04 1989-09-12 Avibank Mfg., Inc. Quick action fastener assembly
US6318928B1 (en) * 2000-01-07 2001-11-20 Astec Industries, Inc. Method and apparatus for electrically heating a screed assembly in a paving machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4474492A (en) * 1982-09-30 1984-10-02 Bestop/Dualmatic, Inc. Self-locking spare tire carrier latch
US4865500A (en) * 1986-11-04 1989-09-12 Avibank Mfg., Inc. Quick action fastener assembly
US6318928B1 (en) * 2000-01-07 2001-11-20 Astec Industries, Inc. Method and apparatus for electrically heating a screed assembly in a paving machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10662592B1 (en) 2019-01-31 2020-05-26 Caterpillar Paving Products Inc. Screed heating element holder
US11274404B2 (en) 2019-03-13 2022-03-15 Caterpillar Paving Products Inc. Retention apparatus for screed cover

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