US3802751A - Contoured track shoe for sealed track belts - Google Patents

Contoured track shoe for sealed track belts Download PDF

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Publication number
US3802751A
US3802751A US00283722A US28372272A US3802751A US 3802751 A US3802751 A US 3802751A US 00283722 A US00283722 A US 00283722A US 28372272 A US28372272 A US 28372272A US 3802751 A US3802751 A US 3802751A
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US
United States
Prior art keywords
track
belt
shoe
elastomer
wear
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00283722A
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English (en)
Inventor
M Beyers
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.)
Caterpillar Inc
Original Assignee
Caterpillar Tractor Co
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 Caterpillar Tractor Co filed Critical Caterpillar Tractor Co
Priority to US00283722A priority Critical patent/US3802751A/en
Priority to CA177,010A priority patent/CA997402A/en
Priority to GB3932173A priority patent/GB1443206A/en
Priority to BE134901A priority patent/BE803988A/xx
Priority to JP9564873A priority patent/JPS5645829B2/ja
Application granted granted Critical
Publication of US3802751A publication Critical patent/US3802751A/en
Priority to CA244,469A priority patent/CA996983A/en
Assigned to CATERPILLAR INC., A CORP. OF DE. reassignment CATERPILLAR INC., A CORP. OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: CATERPILLAR TRACTOR CO., A CORP. OF CALIF.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D55/00—Endless track vehicles
    • B62D55/08—Endless track units; Parts thereof
    • B62D55/18—Tracks
    • B62D55/26—Ground engaging parts or elements
    • B62D55/28—Ground engaging parts or elements detachable

Definitions

  • Track belt systems employ an elastomer flexiblebelt with a plurality of track shoes attached to the outer circular periphery of the belt, with the belt supported by a pneumatic carcass,' gives a tired vehicle increased traction, improved flotation and increased resistance to penetration of objects which can puncture the pneumatic support system.
  • Such track belts are described in this assignees copending U.S. Pat. application Ser. No. 93,033, entitled Flexible Track Belts and filed on Nov. 27, I970.
  • the outer circular peripheral surface is modified to include-a plurality of flat track shoe sites which are permanently formed in its outer periphery to eliminate the gaps under the leading and trailing edges of the track'shoes mounted on the otherwise normally circular surface of the belt.
  • a raised transverse rib or ridge of elastomer can be formed between these flat track shoe sites so they will abut against adjacent leading and trailing edges of adjacent track wear shoes and prevent the ingress of soiland rock particles between such edges.
  • While the above track shoe and belt arrangement eliminates the wedge-shaped gaps under the leading and trailing edge portions of a track shoe mounted on a circular surface of an elastomer belt with the ribs limiting the ingress of soil and rock particles between the adjacent edges of the track wear shoes, some ingress of these particles may occur in certain earth-working environments in which earthmoving vehicles are operated.
  • a contoured track wear shoe for use with a cylindrical elastomer track belt having a central cylindrical inextensible reinforcing ply and a plurality of flat track shoe sites permanently formed in its outer periphery to accept track wear shoes, includes a track wear shoe having a top wear surface and a bottom mounting surface with the mounting surface having a leading edge surface portion and a trailing edge surface portion separated by a flat central surface portion wherein the leading and trailing edge surface portions are canted inwardly so that their outermost edge is higher than the plane of the flat central surface portion which will allow these edges to sealingly deform the elastomer of their associated flat track shoe site formed in the belt when the belt is clamped against the bottom mounting surface of the contoured shoe when the belt is supported about the circumference of a pneumatic carcass.
  • the cant or a cord of any curvature in these leading and trailing edge surface portions with respect to the plane of the flat central surface portion of the mounting surface is in the range of 3 degrees for a circular belt having 36 such contoured track wear shoes mounted thereon and a nominal diameter of approximately 88- /2 inches to avoid excessive stress concentration and undue deflection at the leading and trailing perimeters of the flat shoe site where the leading and trailing edge portions of the individual shoes engage the elastomer as the shoes pass through the footprint formed by the pneumatically supported system at which time these shoes articulate toward an aligned condition.
  • FIG. 1 is'a perspective of a contoured track wear shoe according to this invention
  • FIG. 2 is an elevation of a track wear shoe shown in FIG. 1 and exploded from a portion of an associated elastomer belt which has parts broken away;
  • FIG. 3 is a cross section through a track shoe shown in FIG. I mounted with an elastomer belt and illustrating how the track wear shoe is attached to the belt.
  • FIGS. 1 and 2 a general configuration of an improved rectangular track wear shoe 10 is illustrated in which the shoe has a top wear surface 11 having two spaced apart grousers 12 disposed thereon. These grousers are respectively located on a leading edge portion 13 and a trailing edge portion 14 of the shoe and are separated by a central portion 15, all of which portions are formed as integral parts of the shoe. It should be appreciated that the configuration of the grousers disclosed as being disposed transversely on the shoe could be changed and even replaced with rubber grousers with the appropriate modification to the top wear surface of the track wear shoe.
  • the bottom mounting surface 16 of the shoe 10 has the same three identifiable portions referred to above, and thus has surfaces corresponding thereto being respectively, the leading edge surface 13a, the trailing edge surface 14a, and the connecting central surface 15a.
  • the connecting central surface 15a is flat and, in FIG. 2, is shown as being in a plane P which defines this flat transverse mounting surface which has a width A.
  • the leading edge surface 13a has a smaller width B which is the same width as the trailing edge surface 14a, that also has a width B.
  • the leading and trailing edge surfaces are canted relative to plane P so that these surfaces or a cord of these surfaces, if they are curved, make a small anglea with this plane.
  • This angle is in the range of 1 per 25 inches of beltdiameter and may vary from 05 to 2 per 25 inches of nominal belt diameter for belts having diameters over 50 inches and from 2-6 per 25 inches of nominal belt diameter for belts having a diameter under 50 inches.
  • the degree of cant is dependent upon the total width of the track shoe and must be selected to avoid undue stress concentration and deformation of the belt directly under its leading and trailing edge surfaces as the pneumatically supported system'passes through the footprint.
  • a belt having a diameter of 88- /2 inches may include 36 of the contoured wear shoes, each 7 inches wide, wherein the flat mounting surface width A is 4 inches and the canted leading and trailing edge widths B are 1.5 inches. 4
  • the individual flat track shoe sites are permanently formed in the elastomer of the cylindrical elastomer belts, forming flat transverse sites thereon when the belt is supported on a circular carcass, the attachment of a contoured track wear shoe on a site will cause the leading and trailing edge portions of the mounting surface of the shoe to sealingly depress the elastomer thereunder.
  • these edges are rounded along the entire length L.
  • cylindrical elastomer belt consists of a cylindrical elastomer belt having at least one central inextensible cylindrical reinforcing ply 21 which is best illustrated in FIG. 3.
  • This cylindrical reinforcing ply is usually formed by winding wire, cable, or similar inextensible reinforcingfilament about a constant diameter on a layer of uncured elastomer supported on a drum to form a plurality of loops arranged in a side-by-side relationship on the uncured elastomer.
  • transverse strips of elastomer between the adjacent edges of the forming plates so that a transverse rib 23 is formed between the flat track shoe sites, as can be seen in FIG. 2.
  • a channel-shaped keeper bar 24 is used to attach each of the contoured track shoes 10 described above to the cylindrical elastomer belt 20.
  • Each bar is preferably integrally formed with the belt by employing elastomer to fill the void between the circu'mferentiallyspaced keeper bars that are supported on the drum, which are then insulated with a layer of elastomer on which the reinforcing is subsequently wound.
  • each track wear shoe 10 will be located beneath the reinforcing ply 21, as can be seen in FIG. 3.
  • the actual attachment of each track wear shoe 10 iseffected with bolts 25, each of which pass through hole 17 in the outer ends of the track wear shoe, through a hole 26 in the associated ends of the keeper bars and into a threaded bore 27 of a retaining block 28, associated therewith. Tightening the bolts cinches the associated end of the keeper bar against the projecting end of the track shoe, as can be seen in FIG. 3.
  • the channel shape of the keeper bars 24 confines the elastomer of the belt from lateral extrusion when a bar keeper bar is approximately the same width as the flat central portion of the mounting surface 16 of each track shoe and therefore completely confines the belt in the central area of the track shoe to improve the elastomeric coupling between the reinforcing ply in the belt and the individual track shoe by increasing the rubber density about the wires so that little or no slippage will occur along the loops forming the reinforcing ply.
  • the slight inward curvature of the leading and trailing edge portions of the contoured track shoe also aids in limiting the extrusion of the elastomer in a direction parallel to the circular reinforcing loops.
  • a contoured track wear shoe for employment on the outer surface of a flexible cylindrical'elastomer belt having a central cylindrical inextensible reinforcing ply on which belt the contoured track wear shoe is attached comprising:
  • a solid rectangular track shoe having a top wear surface and a bottom mounting surface, said wear surface having integral grouser means projecting therefrom and said mounting surface having a leading edge surface portion and a trailing edge surface portion connected by an integral flat central surface portion,-with said leading and trailing edge surface portions canted inwardly by a small angle no greater than 6 so their outermost edges are raised from a plane through said flat central surface portion so said leading and trailing edges will sealingly deform opposite sides of a flat elastomer belt surface when said central surface portion is clamped so it is contiguous therewith, said rectangular track shoe having attaching means at its projecting ends for attaching it to said belt.
  • contoured track wear shoe defined in claim 1 wherein the outer peripheral edges of the leading and trailing edge portions are rounded along their length to prevent excessive wear of the flat elastomer belt surface to which the track wear shoe is attached.
  • An improved track belt with contoured track wear shoes having a sealing interference fit therewith comprising:
  • a cylindrical elastomer belt having a cylindrical inextensible central reinforcing ply; said elastomer belt having a plurality of circumferentially disposed flat track shoe sites permanently formed in its outer peripheral surface;
  • each countoured track shoe is attached to the cylindrical elastomer belt with a channel shaped keeper bar which clamps said elastomer belt against the mounting surface of its associated contoured track shoe.
  • peripheral edges of the leading edge portion and the trailing edge portion are rounded and the cylindrical elastomer belt has a raised transverse rib between the flat track shoe sites which the rounded pe ripheral edges abut against when the contoured track shoe is attached to said cylindrical elastomer belt.
  • An elastomer track belt for mounting metal shoes circumferentially about a pneumatic carcass comprising:
  • a cylindrical elastomer belt having an internal cylindrical inextensible reinforcing ply surrounded by elastomer, said elastomer belt having a plurality of circumferentially disposed flat track shoe sites permanently formed in its outer peripheral surface;
  • keeper means disposed circumferentially about the inner peripheral surface of said belt, said keeper means disposed inside said inextensible reinforcing ply with one of said keeper means located beneath each flat track shoe sites;
  • transverse ribs of elastomers located between adjacent flat track shoe sites, said transverse ribs integrally formed with said elastomer of said track belt and operable to form an edge seal between adjacent metal track shoes when the latter are mounted on adjacent flat track shoe sites whereby the ingress of foreign materials under the forward and trailing edges of said several metal track shoes is restricted by the resulting seal.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)
  • Escalators And Moving Walkways (AREA)
US00283722A 1972-08-25 1972-08-25 Contoured track shoe for sealed track belts Expired - Lifetime US3802751A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US00283722A US3802751A (en) 1972-08-25 1972-08-25 Contoured track shoe for sealed track belts
CA177,010A CA997402A (en) 1972-08-25 1973-07-20 Contoured track shoe for sealed track belts
GB3932173A GB1443206A (en) 1972-08-25 1973-08-20 Track shoes and track belts
BE134901A BE803988A (fr) 1972-08-25 1973-08-24 Patin profile pour portee de roulement
JP9564873A JPS5645829B2 (en, 2012) 1972-08-25 1973-08-25
CA244,469A CA996983A (en) 1972-08-25 1976-01-29 Elastomer track belt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00283722A US3802751A (en) 1972-08-25 1972-08-25 Contoured track shoe for sealed track belts

Publications (1)

Publication Number Publication Date
US3802751A true US3802751A (en) 1974-04-09

Family

ID=23087276

Family Applications (1)

Application Number Title Priority Date Filing Date
US00283722A Expired - Lifetime US3802751A (en) 1972-08-25 1972-08-25 Contoured track shoe for sealed track belts

Country Status (5)

Country Link
US (1) US3802751A (en, 2012)
JP (1) JPS5645829B2 (en, 2012)
BE (1) BE803988A (en, 2012)
CA (1) CA997402A (en, 2012)
GB (1) GB1443206A (en, 2012)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3964797A (en) * 1975-03-03 1976-06-22 Caterpillar Tractor Co. Track shoe with staggered grousers
DE2653655A1 (de) * 1976-01-05 1977-07-14 Goodyear Tire & Rubber Entfernbare laufgurtanordnung fuer reifen
FR2365451A1 (fr) * 1976-09-27 1978-04-21 Caterpillar Tractor Co Perfectionnements aux bandes de roulement
US4086947A (en) * 1976-01-05 1978-05-02 The Goodyear Tire & Rubber Company Traction shoe seal
US4368929A (en) * 1977-05-05 1983-01-18 Caterpillar Tractor Co. Sealed track belt arrangement
EP0251179A3 (de) * 1986-06-26 1988-04-20 Karl Kässbohrer Fahrzeugwerke GmbH Raupenkette für Pistenpflegefahrzeuge
US6517173B1 (en) * 1999-12-14 2003-02-11 Jack Oberlander Endless track system
USD737337S1 (en) * 2014-03-19 2015-08-25 Tire Protection Solutions, Llc Tire track shoe
USD737338S1 (en) * 2014-03-19 2015-08-25 Tire Protection Solutions, Llc Tire track shoe
USD737867S1 (en) * 2014-03-19 2015-09-01 Tire Protection Solutions, Llc Tire track shoe
USD737868S1 (en) * 2014-03-19 2015-09-01 Tire Protection Solutions, Llc Tire track shoe
WO2016123687A1 (en) * 2015-02-04 2016-08-11 Brad Blackburn Detachable traction system for endless track vehicles
US9862436B2 (en) * 2010-02-08 2018-01-09 John Menzies Burling Device to enhance the traction of a tracked vehicle
US10427736B2 (en) 2017-05-12 2019-10-01 Bradley Blackburn Wear resistant studs for tracked vehicles
CN115315384A (zh) * 2020-04-16 2022-11-08 株式会社小松制作所 行驶体、作业机械、履带板以及履带

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2025999A (en) * 1932-01-25 1935-12-31 Edward C Myers Rubber covered flexible track
US2332313A (en) * 1942-09-03 1943-10-19 James A Watson Jr Track for track-laying vehicles
US2378427A (en) * 1941-05-14 1945-06-19 Edward C Myers Flexible track
US3580647A (en) * 1968-10-15 1971-05-25 Textron Inc Snowmobile track

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2025999A (en) * 1932-01-25 1935-12-31 Edward C Myers Rubber covered flexible track
US2378427A (en) * 1941-05-14 1945-06-19 Edward C Myers Flexible track
US2332313A (en) * 1942-09-03 1943-10-19 James A Watson Jr Track for track-laying vehicles
US3580647A (en) * 1968-10-15 1971-05-25 Textron Inc Snowmobile track

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3964797A (en) * 1975-03-03 1976-06-22 Caterpillar Tractor Co. Track shoe with staggered grousers
DE2608795A1 (de) * 1975-03-03 1976-09-16 Caterpillar Tractor Co Gleiskettenschuh mit greifrippen
DE2653655A1 (de) * 1976-01-05 1977-07-14 Goodyear Tire & Rubber Entfernbare laufgurtanordnung fuer reifen
US4086947A (en) * 1976-01-05 1978-05-02 The Goodyear Tire & Rubber Company Traction shoe seal
FR2365451A1 (fr) * 1976-09-27 1978-04-21 Caterpillar Tractor Co Perfectionnements aux bandes de roulement
US4368929A (en) * 1977-05-05 1983-01-18 Caterpillar Tractor Co. Sealed track belt arrangement
EP0251179A3 (de) * 1986-06-26 1988-04-20 Karl Kässbohrer Fahrzeugwerke GmbH Raupenkette für Pistenpflegefahrzeuge
US6517173B1 (en) * 1999-12-14 2003-02-11 Jack Oberlander Endless track system
US9862436B2 (en) * 2010-02-08 2018-01-09 John Menzies Burling Device to enhance the traction of a tracked vehicle
USD737867S1 (en) * 2014-03-19 2015-09-01 Tire Protection Solutions, Llc Tire track shoe
USD737338S1 (en) * 2014-03-19 2015-08-25 Tire Protection Solutions, Llc Tire track shoe
USD737868S1 (en) * 2014-03-19 2015-09-01 Tire Protection Solutions, Llc Tire track shoe
USD737337S1 (en) * 2014-03-19 2015-08-25 Tire Protection Solutions, Llc Tire track shoe
WO2016123687A1 (en) * 2015-02-04 2016-08-11 Brad Blackburn Detachable traction system for endless track vehicles
US20180015971A1 (en) * 2015-02-04 2018-01-18 Brad Blackburn Detachable traction system for endless track vehicles
US10421508B2 (en) 2015-02-04 2019-09-24 Brad Blackburn Detachable traction system for endless track vehicles
RU2705892C2 (ru) * 2015-02-04 2019-11-12 Брэд БЛЭКБЁРН Съемная система для обеспечения сцепления с грунтом для гусеничного транспортного средства
US10427736B2 (en) 2017-05-12 2019-10-01 Bradley Blackburn Wear resistant studs for tracked vehicles
US11718357B2 (en) 2017-05-12 2023-08-08 Claw Manufacturing Ltd. Method for welding carbide
CN115315384A (zh) * 2020-04-16 2022-11-08 株式会社小松制作所 行驶体、作业机械、履带板以及履带

Also Published As

Publication number Publication date
BE803988A (fr) 1974-02-25
CA997402A (en) 1976-09-21
GB1443206A (en) 1976-07-21
JPS5645829B2 (en, 2012) 1981-10-29
JPS4958542A (en, 2012) 1974-06-06

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Legal Events

Date Code Title Description
AS Assignment

Owner name: CATERPILLAR INC., 100 N.E. ADAMS STREET, PEORIA, I

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:CATERPILLAR TRACTOR CO., A CORP. OF CALIF.;REEL/FRAME:004669/0905

Effective date: 19860515

Owner name: CATERPILLAR INC., A CORP. OF DE.,ILLINOIS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CATERPILLAR TRACTOR CO., A CORP. OF CALIF.;REEL/FRAME:004669/0905

Effective date: 19860515