US20020047307A1 - Protective cover for guide blocks - Google Patents
Protective cover for guide blocks Download PDFInfo
- Publication number
- US20020047307A1 US20020047307A1 US09/207,357 US20735798A US2002047307A1 US 20020047307 A1 US20020047307 A1 US 20020047307A1 US 20735798 A US20735798 A US 20735798A US 2002047307 A1 US2002047307 A1 US 2002047307A1
- Authority
- US
- United States
- Prior art keywords
- cover member
- set forth
- drive belt
- guide block
- belt assembly
- 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.)
- Granted
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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
- B62D55/20—Tracks of articulated type, e.g. chains
- B62D55/202—Wheel engaging parts; Wheel guides on links
-
- 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
- B62D55/24—Tracks of continuously flexible type, e.g. rubber belts
Definitions
- the present invention relates generally to drive belts for track-type machinery and, more particularly, to a protective cover for guide blocks on a drive belt.
- One type of such machine is one having an undercarriage incorporating a track assembly as shown in FIG. 1 including a driving sprocket wheel 10 , an idler wheel 12 , a drive belt 14 which extends around the driving sprocket wheel 10 and the idler wheel 12 , and a plurality of roller wheels 16 arranged in contact with the inner surface 18 of a ground contact region of the drive belt 14 between the driving sprocket wheel 10 and the idler wheel 12 .
- a conventional drive belt 14 has a plurality of rubber lugs 20 formed on its outer circumference 22 , and a plurality of protruding guide blocks 24 formed on the inner surface 18 to protrude at a central region thereof and spaced to each other by a predetermined distance in the longitudinal direction of the drive belt 14 .
- the guide blocks 24 are engaged by a plurality of driving members 26 such as drive pins, teeth, or the like disposed between the wheel portions and adapted to drive the drive belt 14 .
- each of the wheels 10 , 12 , 16 includes an inner wheel portion 28 and an outer wheel portion 30 spaced from each other on an axle 32 at a distance at least the width of the guide blocks 24 .
- the inner wheel portion 28 and the outer wheel portion 30 also help keep the drive belt 14 in alignment with driving sprocket wheel 10 .
- a plurality of guide rollers 60 guide and support the belt 58 between the drive and idler wheels 50 , 54 as shown in FIG. 7.
- the tensioning means 62 tensions the elastomeric drive belt 58 between the drive wheel 50 and the idler wheel 54 .
- the guide blocks 64 in the friction drive system undergo wear and tear, requiring the replacement of the entire belt 58 even if only a few of the guideblocks 64 on the belt 58 are damaged.
- a belted work machine 46 includes a drive wheel 50 , an idler wheel 54 , and endless belt which extends around the drive wheel 50 and idler wheel 54 .
- the plurality of the guide blocks 64 are spaced to each other by a predetermined distance.
- the guide blocks 64 are received by guide channels 66 .
- FIG. 8 the configuration of the preferred driver wheel structure 68 and the endless belt 58 are shown.
- the guide block 64 is received by the guide channel 66 .
- Purcell et al. U.S. Pat. No. 5,433,515 discloses guide rollers for a flexible drive belt including first and second rotatable guide rollers adapted to contact guide blocks on the drive belt and guide them into the space between the inner and outer wheel portions of the idler wheel 10 .
- the Purcell et al. device prolongs the useful life of the flexible guide blocks by guiding them into the opening between spaced idler wheels, thereby lessening frictional contact and damage between the idler wheel and the guide blocks.
- the Purcell et al. device does not, however, disclose means for a covering the guide block to help protect it from wear.
- the present invention is directed to overcoming one or more of the problems as set forth above.
- a protective cover member for a guide block on a drive belt includes an inner portion shaped to substantially conform to at least a portion of the outer surface of the guide block.
- the cover member is attached to the guide block using suitable attachment means such as bonding the cover member to the guide block, mechanical fasteners such as screws or bolts, and/or using an interference design whereby the cover member is retained by frictional forces or by snapping around a portion of the guide block.
- the outer surface of the cover member is shaped and sized to be engaged by drive members associated with a sprocket drive wheel.
- the cover member may be constructed of material that is capable of withstanding higher temperatures and forces compared to the material of the guide blocks.
- FIG. 1 is a side view of a track assembly with a positive drive system
- FIG. 1 a is a front view of a driving sprocket wheel
- FIG. 2 is a perspective view of the cover member positioned over the guide block
- FIG. 3 is a side view of the cover member positioned over the guide block
- FIG. 4 is a front view of the cover member positioned over the guide block
- FIG. 5 is a cross-sectional view of the cover member positioned over the guide block showing means for retaining the cover member on the guide block;
- FIG. 6 is a cross-sectional view of the cover member positioned over the guide block showing other means for retaining the cover member on the guide block;
- FIG. 7 is a side view of a track assembly with a friction drive system
- FIG. 8 is a cross-sectional view of the configuration of the preferred driver wheel structure and the belt.
- a cover member 34 for covering one or more guide blocks 24 that extend from the surface of the drive belt 14 is shown.
- the cover member 34 includes an inner portion that is shaped to be positionable over at least a portion of the outer surface of a guide block 24 .
- the guide blocks 24 may have substantially the same or substantially different shapes, and cover member 34 can be constructed to a size and shape that covers the desired portion of a particular guide block 24 .
- the cover member 34 may cover a relatively small portion of the outer surface of the guide block 24 , or it may cover a substantial portion of the outer surface of the guide block 24 .
- the cover member 34 may be used on the portion of guide block 24 that comes into contact with drive members 26 during forward and reverse operation.
- the portion to be covered may therefore include the sides of the guide block 24 that face drive members 26 .
- the cover member 34 may be constructed to fit substantially around the entire guide block 24 as shown in FIGS. 2 through 4.
- the cover member 34 is shaped and sized to allow the guide block 24 to be engaged by drive members 26 .
- the thickness of the cover member 34 is selected to allow enough space for drive members 24 between guide blocks 24 .
- Cover member 34 includes an inner portion shaped to substantially conform to at least a portion of the outer surface of the guide block to facilitate attaching cover member 34 to guide block 24 .
- Various means for attaching cover member 34 to guide block 24 may be used.
- the attachment means may be temporary to allow cover member 34 to be removed from guide block 24 when desired, such as when replacing a worn cover member 34 with a new cover member 34 .
- the attachment means may be permanent, especially when other components of drive belt 14 are constructed of materials that are less durable than the cover member material, and it is foreseen that drive belt 14 will be replaced before cover members 34 wear out.
- One attachment means includes bonding cover member 34 to guide block 24 using a suitable adhesive or other bonding method.
- Another attachment means includes any one or a combination of different types of mechanical fasteners such as a screw, bolt, or clip.
- the attachment means may further include snapping the cover member 34 around at least a portion of the guide block 24 .
- a groove 36 may be used to retain a bead portion 38 such as shown in FIG. 5.
- the groove 36 may be located in either the guide block 24 or the cover member 34 , with the bead portion 38 located in the component that does not contain the groove 36 .
- the groove 36 and bead portion 38 may extend around the entire guide block 24 and cover member 34 , or around one or more portions of the guide block 24 and cover member 34 .
- the guide block 24 may be constructed to include an edge portion 40 to retain a lip portion 42 on cover member 34 such as shown in FIG. 6.
- the edge portion 40 and lip portion 42 may extend around the entire perimeter of guide block 24 and cover member 34 , or only around selected portions of the perimeters.
- the edge portion 40 and lip portion 42 may be sized and shaped to allow cover member 34 to be removed as desired.
- a further alternative means for attaching cover member 34 to guide block 24 is to construct the inner portion of cover member 34 to fit snugly over the outer surface of guide block 24 so that cover member 34 is retained by frictional force.
- the outer surface of guide block 24 and inner surface of cover member 34 may have a textured finish or be lined with materials having the desired coefficient of friction between them.
- cover member 34 is constructed of material that is capable of withstanding higher temperatures and/or forces compared to the material of the guide blocks 24 .
- Representative materials include nylons, polyphthalamides, polyketones, and polyofefins. Reinforcement material may also be added to increase the durability of the cover member 34 .
- the cover member 34 may be manufactured using various processes well known in the art such as rotational molding, injection molding, blow molding, thermoforming, and/or extrusion.
- the present invention for a cover member 34 for guide blocks 24 on a drive belt 14 is applicable in situations where machinery having one or more drive belt assemblies, such as the assembly shown in FIG. 1, are used.
- the cover member 34 provides means to extend the effective life of guide blocks 24 , thereby reducing the number of times the entire drive belt 14 must be replaced over the life of a machine.
- a drive belt 14 may have any number of guide blocks 24 , and a corresponding number of cover members 34 may be supplied to protect them. Additionally, there may be some applications where it is desired to cover some of the guide blocks 24 with cover members 34 , but not others. Importantly, each individual cover member 34 may be replaced as required when worn.
- cover members 34 may be used on the guide blocks 24 until it is determined that remaining useful life of the drive belt 14 is approximately as long as the useful life of the guide blocks 24 without the cover members 34 . In this situation, the cover members 34 do not have to be replaced when they are worn.
- the present invention thus provides economical means for extending the useful life of the drive belt 14 that is adaptable to a variety of situations.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
Description
- The present invention relates generally to drive belts for track-type machinery and, more particularly, to a protective cover for guide blocks on a drive belt.
- Agricultural and construction machines often operate in soils such as mud and sand where it is difficult for conventional wheel type machines to gain traction. Therefore, alternate types of machines capable of operating in such adverse soil conditions are in demand.
- One type of such machine is one having an undercarriage incorporating a track assembly as shown in FIG. 1 including a driving
sprocket wheel 10, anidler wheel 12, adrive belt 14 which extends around the drivingsprocket wheel 10 and theidler wheel 12, and a plurality ofroller wheels 16 arranged in contact with theinner surface 18 of a ground contact region of thedrive belt 14 between the drivingsprocket wheel 10 and theidler wheel 12. Aconventional drive belt 14 has a plurality ofrubber lugs 20 formed on its outer circumference 22, and a plurality ofprotruding guide blocks 24 formed on theinner surface 18 to protrude at a central region thereof and spaced to each other by a predetermined distance in the longitudinal direction of thedrive belt 14. Theguide blocks 24 are engaged by a plurality of drivingmembers 26 such as drive pins, teeth, or the like disposed between the wheel portions and adapted to drive thedrive belt 14. - To accommodate the
guide blocks 24, each of thewheels inner wheel portion 28 and anouter wheel portion 30 spaced from each other on anaxle 32 at a distance at least the width of theguide blocks 24. Theinner wheel portion 28 and theouter wheel portion 30 also help keep thedrive belt 14 in alignment with drivingsprocket wheel 10. - A plurality of
guide rollers 60 guide and support thebelt 58 between the drive andidler wheels elastomeric drive belt 58 between thedrive wheel 50 and theidler wheel 54. - As in the positive drive system, the guide blocks64 in the friction drive system undergo wear and tear, requiring the replacement of the
entire belt 58 even if only a few of theguideblocks 64 on thebelt 58 are damaged. Thus, as in the positive drive system, it is desirable to provide means for protecting components subject to heavy wear and tear, thereby increasing the life of thebelt 58. - Another type of such machine which may utilize the protective cover is a friction drive system as is shown in FIG. 7. A
belted work machine 46 includes adrive wheel 50, anidler wheel 54, and endless belt which extends around thedrive wheel 50 andidler wheel 54. The plurality of theguide blocks 64 are spaced to each other by a predetermined distance. Theguide blocks 64 are received byguide channels 66. - During operation, continuous frictional contact between the guide blocks, the driving members, and the idler wheel can cause damage to the guide blocks. Further, when the machine maneuvers over sloped surfaces, the forces on the guide blocks increase due to the fact that the guide blocks support the forces required to drive the machine over the terrain, along with force components of the machine's weight. The increased forces cause greater wear and tear on the guide blocks, requiring replacement of the entire drive belt even if only a few of the guide blocks on the drive belt are damaged. It is desirable to provide means for protecting components subject to heavy wear and tear, thereby increasing the effective life of the drive belt.
- Referring to FIG. 8, the configuration of the preferred
driver wheel structure 68 and theendless belt 58 are shown. Theguide block 64 is received by theguide channel 66. - Currently, there are devices requiring additional structure on the track assembly to improve the alignment of the guide blocks with the idler wheels. Purcell et al. U.S. Pat. No. 5,433,515 discloses guide rollers for a flexible drive belt including first and second rotatable guide rollers adapted to contact guide blocks on the drive belt and guide them into the space between the inner and outer wheel portions of the
idler wheel 10. The Purcell et al. device prolongs the useful life of the flexible guide blocks by guiding them into the opening between spaced idler wheels, thereby lessening frictional contact and damage between the idler wheel and the guide blocks. The Purcell et al. device does not, however, disclose means for a covering the guide block to help protect it from wear. - Accordingly, the present invention is directed to overcoming one or more of the problems as set forth above.
- In one embodiment of the present invention, a protective cover member for a guide block on a drive belt includes an inner portion shaped to substantially conform to at least a portion of the outer surface of the guide block. The cover member is attached to the guide block using suitable attachment means such as bonding the cover member to the guide block, mechanical fasteners such as screws or bolts, and/or using an interference design whereby the cover member is retained by frictional forces or by snapping around a portion of the guide block. The outer surface of the cover member is shaped and sized to be engaged by drive members associated with a sprocket drive wheel. The cover member may be constructed of material that is capable of withstanding higher temperatures and forces compared to the material of the guide blocks.
- FIG. 1 is a side view of a track assembly with a positive drive system;
- FIG. 1a is a front view of a driving sprocket wheel;
- FIG. 2 is a perspective view of the cover member positioned over the guide block;
- FIG. 3 is a side view of the cover member positioned over the guide block;
- FIG. 4 is a front view of the cover member positioned over the guide block;
- FIG. 5 is a cross-sectional view of the cover member positioned over the guide block showing means for retaining the cover member on the guide block;
- FIG. 6 is a cross-sectional view of the cover member positioned over the guide block showing other means for retaining the cover member on the guide block;
- FIG. 7 is a side view of a track assembly with a friction drive system; and
- FIG. 8 is a cross-sectional view of the configuration of the preferred driver wheel structure and the belt.
- Referring to FIGS. 1 and 2, a
cover member 34 for covering one ormore guide blocks 24 that extend from the surface of thedrive belt 14 is shown. Thecover member 34 includes an inner portion that is shaped to be positionable over at least a portion of the outer surface of aguide block 24. Theguide blocks 24 may have substantially the same or substantially different shapes, andcover member 34 can be constructed to a size and shape that covers the desired portion of aparticular guide block 24. Thecover member 34 may cover a relatively small portion of the outer surface of theguide block 24, or it may cover a substantial portion of the outer surface of theguide block 24. For example, thecover member 34 may be used on the portion ofguide block 24 that comes into contact withdrive members 26 during forward and reverse operation. The portion to be covered may therefore include the sides of theguide block 24 thatface drive members 26. Alternatively, thecover member 34 may be constructed to fit substantially around theentire guide block 24 as shown in FIGS. 2 through 4. - The
cover member 34 is shaped and sized to allow theguide block 24 to be engaged by drivemembers 26. The thickness of thecover member 34 is selected to allow enough space for drivemembers 24 betweenguide blocks 24. -
Cover member 34 includes an inner portion shaped to substantially conform to at least a portion of the outer surface of the guide block to facilitate attachingcover member 34 to guideblock 24. Various means for attachingcover member 34 to guideblock 24 may be used. The attachment means may be temporary to allowcover member 34 to be removed fromguide block 24 when desired, such as when replacing aworn cover member 34 with anew cover member 34. Alternatively, the attachment means may be permanent, especially when other components ofdrive belt 14 are constructed of materials that are less durable than the cover member material, and it is foreseen thatdrive belt 14 will be replaced beforecover members 34 wear out. One attachment means includes bondingcover member 34 to guideblock 24 using a suitable adhesive or other bonding method. Another attachment means includes any one or a combination of different types of mechanical fasteners such as a screw, bolt, or clip. - The attachment means may further include snapping the
cover member 34 around at least a portion of theguide block 24. With this method, agroove 36 may be used to retain abead portion 38 such as shown in FIG. 5. Thegroove 36 may be located in either theguide block 24 or thecover member 34, with thebead portion 38 located in the component that does not contain thegroove 36. Thegroove 36 andbead portion 38 may extend around theentire guide block 24 andcover member 34, or around one or more portions of theguide block 24 andcover member 34. Alternatively, theguide block 24 may be constructed to include anedge portion 40 to retain alip portion 42 oncover member 34 such as shown in FIG. 6. Theedge portion 40 andlip portion 42 may extend around the entire perimeter ofguide block 24 andcover member 34, or only around selected portions of the perimeters. Theedge portion 40 andlip portion 42 may be sized and shaped to allowcover member 34 to be removed as desired. - A further alternative means for attaching
cover member 34 to guideblock 24 is to construct the inner portion ofcover member 34 to fit snugly over the outer surface ofguide block 24 so thatcover member 34 is retained by frictional force. To increase the frictional forces between the components, the outer surface ofguide block 24 and inner surface ofcover member 34 may have a textured finish or be lined with materials having the desired coefficient of friction between them. - In the preferred embodiment,
cover member 34 is constructed of material that is capable of withstanding higher temperatures and/or forces compared to the material of the guide blocks 24. Representative materials include nylons, polyphthalamides, polyketones, and polyofefins. Reinforcement material may also be added to increase the durability of thecover member 34. Thecover member 34 may be manufactured using various processes well known in the art such as rotational molding, injection molding, blow molding, thermoforming, and/or extrusion. - The present invention for a
cover member 34 for guide blocks 24 on adrive belt 14 is applicable in situations where machinery having one or more drive belt assemblies, such as the assembly shown in FIG. 1, are used. Thecover member 34 provides means to extend the effective life of guide blocks 24, thereby reducing the number of times theentire drive belt 14 must be replaced over the life of a machine. Adrive belt 14 may have any number of guide blocks 24, and a corresponding number ofcover members 34 may be supplied to protect them. Additionally, there may be some applications where it is desired to cover some of the guide blocks 24 withcover members 34, but not others. Importantly, eachindividual cover member 34 may be replaced as required when worn. As a further alternative,cover members 34 may be used on the guide blocks 24 until it is determined that remaining useful life of thedrive belt 14 is approximately as long as the useful life of the guide blocks 24 without thecover members 34. In this situation, thecover members 34 do not have to be replaced when they are worn. The present invention thus provides economical means for extending the useful life of thedrive belt 14 that is adaptable to a variety of situations. - Other aspects, objects and advantages of the present invention can be obtained from a study of the drawings, the disclosure and the appended claims.
Claims (35)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US09/207,357 US6386654B1 (en) | 1998-12-08 | 1998-12-08 | Protective cover for guide blocks |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US09/207,357 US6386654B1 (en) | 1998-12-08 | 1998-12-08 | Protective cover for guide blocks |
Publications (2)
Publication Number | Publication Date |
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US20020047307A1 true US20020047307A1 (en) | 2002-04-25 |
US6386654B1 US6386654B1 (en) | 2002-05-14 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US09/207,357 Expired - Lifetime US6386654B1 (en) | 1998-12-08 | 1998-12-08 | Protective cover for guide blocks |
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US (1) | US6386654B1 (en) |
Cited By (1)
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US20090013660A1 (en) * | 2007-07-13 | 2009-01-15 | John Salazar | Operationally Improved Clutch-Driven Landscaping Vehicle |
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US20050103540A1 (en) * | 2003-11-19 | 2005-05-19 | Denys Lavoie | Track with low friction reinforced guide blocks |
WO2005049414A1 (en) * | 2003-11-20 | 2005-06-02 | The Circle For The Promotion Of Science And Engineering | Crawler belt, crawler device, and method of producing the crawler belt |
US7798579B2 (en) * | 2007-08-29 | 2010-09-21 | Deere & Company | Endless track chain assembly with in situ replacement wear parts |
US20110068620A1 (en) * | 2009-09-18 | 2011-03-24 | Marc Delisle | Wear protectors for protecting guide and/or drive lugs of an endless track for traction of an off-road vehicle |
KR101146092B1 (en) | 2009-12-11 | 2012-05-15 | 한국카모플라스트(주) | Rubber crawler that component shock suction a groove |
US8419139B2 (en) * | 2010-01-08 | 2013-04-16 | Alcoa Inc. | Tank wheel assembly with wear resistant coating |
US8857924B2 (en) * | 2010-05-27 | 2014-10-14 | Ati, Inc. | Lugs of continuous rubber tracks for track vehicles |
CA2744630C (en) | 2010-06-30 | 2018-10-09 | Camoplast Solideal Inc. | Wheel of a track assembly of a tracked vehicle |
US8985250B1 (en) | 2010-12-14 | 2015-03-24 | Camoplast Solideal Inc. | Track drive mode management system and methods |
US9334001B2 (en) | 2010-12-14 | 2016-05-10 | Camso Inc. | Drive sprocket, drive lug configuration and track drive arrangement for an endless track vehicle |
US9067631B1 (en) | 2010-12-14 | 2015-06-30 | Camoplast Solideal Inc. | Endless track for traction of a vehicle |
CA3100440A1 (en) | 2015-03-04 | 2016-09-09 | Camso Inc. | Track system for traction of a vehicle |
EP3313717B1 (en) | 2015-06-29 | 2020-10-14 | Camso Inc. | Systems and methods for monitoring a track system for traction of a vehicle |
CA3085012A1 (en) | 2017-12-08 | 2018-12-07 | Camso Inc. | Systems and methods for monitoring off-road vehicles |
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Cited By (1)
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US20090013660A1 (en) * | 2007-07-13 | 2009-01-15 | John Salazar | Operationally Improved Clutch-Driven Landscaping Vehicle |
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US6386654B1 (en) | 2002-05-14 |
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