IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
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출원번호 |
US-0471328
(2009-05-22)
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등록번호 |
US-8590986
(2013-11-26)
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발명자
/ 주소 |
- Kim, Geuk Bae
- Lajoie, Hugues
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출원인 / 주소 |
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대리인 / 주소 |
Christensen O'Connor Johnson Kindness PLLC
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인용정보 |
피인용 횟수 :
0 인용 특허 :
3 |
초록
▼
An endless track for traction of a work vehicle. The endless track comprises a body of elastomeric material and a plurality of cores at least partially embedded in the elastomeric material. Each core comprises a pair of wings extending transversally to a longitudinal axis of the endless track, and a
An endless track for traction of a work vehicle. The endless track comprises a body of elastomeric material and a plurality of cores at least partially embedded in the elastomeric material. Each core comprises a pair of wings extending transversally to a longitudinal axis of the endless track, and a wheel guide comprising at least one guide projection projecting on an inner side of the endless track. Each guide projection comprises a top end and a wheel-facing side for facing wheels of the work vehicle, such as roller wheels that roll on the inner side of the endless track. The wheel-facing side comprises a recess to impede passage of grit between the wheel-facing side and a portion of the elastomeric material in the recess. This can enhance a wear resistance of the endless track.
대표청구항
▼
1. An endless track for traction of a work vehicle, the endless track comprising a ground-engaging outer side for engaging the ground and an inner side for facing a plurality of wheels of the work vehicle, the plurality of wheels including a drive wheel for driving the endless track and a plurality
1. An endless track for traction of a work vehicle, the endless track comprising a ground-engaging outer side for engaging the ground and an inner side for facing a plurality of wheels of the work vehicle, the plurality of wheels including a drive wheel for driving the endless track and a plurality of roller wheels for rolling on the inner side to apply a bottom run of the endless track onto the ground, the endless track comprising: a) a body of elastomeric material extending between the inner side and the ground-engaging outer side; andb) a plurality of cores at least partially embedded in the elastomeric material, each core of the plurality of cores comprising: i. a pair of wings extending transversally to a longitudinal direction of the endless track; andii. a wheel guide comprising a guide projection projecting on the inner side, the guide projection comprising a wheel-facing side for facing the plurality of roller wheels, the wheel-facing side comprising: a wheel-contacting surface for contacting the plurality of roller wheels, the wheel-contacting surface being uneven in a widthwise direction of the core such that a first part of the wheel-contacting surface extends further towards the plurality of roller wheels than a second part of the wheel-contacting surface; anda sealing surface extending from the wheel-contacting surface and forming a recess to impede passage of grit between the wheel-facing side and a portion of the elastomeric material in the recess, the recess being narrower than the guide projection in the widthwise direction of the core. 2. The endless track claimed in claim 1, wherein the first part of the wheel-contacting surface forms a protrusion protruding from the second part of the wheel-contacting surface. 3. The endless track claimed in claim 2, wherein the recess extends from a bottom edge of the protrusion. 4. The endless track claimed in claim 2, wherein the protrusion protrudes increasingly in a direction towards a base of the guide projection. 5. The endless track claimed in claim 2, wherein the protrusion includes a generally flat wheel-contacting face. 6. The endless track claimed in claim 2, wherein the protrusion is located in a central region of the wheel-contacting surface in the widthwise direction of the core. 7. The endless track claimed in claim 1, wherein the recess has a depth in a longitudinal direction of the core, the guide projection has a thickness in the longitudinal direction of the core at a top edge of the recess, and a ratio of the depth of the recess to the thickness of the guide projection is at least 0.05. 8. The endless track claimed in claim 7, wherein the ratio of the depth of the recess to the thickness of the guide projection is at least 0.10. 9. The endless track claimed in claim 8, wherein the ratio of the depth of the recess to the thickness of the guide projection is at least 0.20. 10. The endless track claimed in claim 1, wherein the recess has a depth in a longitudinal direction of the core of at least 5 mm. 11. The endless track claimed in claim 10, wherein the depth of the recess is at least 10 mm. 12. The endless track claimed in claim 1, wherein the recess has a width in the widthwise direction of the core at a top edge of the recess, the wheel-facing side has a width in the widthwise direction of the core at the top edge of the recess, and the width of the recess is at least one-quarter of the width of the wheel-facing side. 13. The endless track claimed in claim 12, wherein the width of the recess is at least one-half of the width of the wheel-facing side. 14. The endless track claimed in claim 1, wherein, when the endless track is new, the wheel-contacting surface is at least partially covered by a portion of the elastomeric material expected to wear out as the plurality of roller wheels roll on the inner side and contact the guide projection. 15. The endless track claimed in claim 1, wherein the guide projection is a first guide projection and the plurality of roller wheels is a first plurality of roller wheels, the plurality of wheels of the work vehicle including a second plurality of roller wheels for rolling on the inner side to apply the bottom run of the endless track onto the ground, the wheel guide comprising a second guide projection projecting on the inner side and spaced apart from the first guide projection in a longitudinal direction of the core, the second guide projection comprising a wheel-facing side for facing the second plurality of roller wheels, the wheel-facing side of the second guide projection comprising: a wheel-contacting surface for contacting the second plurality of roller wheels, the wheel-contacting surface of the second guide projection being uneven in the widthwise direction of the core such that a first part of the wheel-contacting surface of the second guide projection extends further towards the second plurality of roller wheels than a second part of the wheel-contacting surface of the second guide projection; anda sealing surface extending from the wheel-contacting surface of the second guide projection and forming a recess to impede passage of grit between the wheel-facing side of the second guide projection and a portion of the elastomeric material in the recess of the second guide projection. 16. The endless track claimed in claim 1, wherein the elastomeric material includes rubber. 17. A work vehicle comprising the endless track claimed in claim 1. 18. The work vehicle claimed in claim 17, wherein the work vehicle is a construction vehicle, an agricultural vehicle, a forestry vehicle or a military vehicle. 19. The endless track claimed in claim 1, wherein the recess prevents the plurality of roller wheels from contacting the wheel-facing side below a top edge of the recess. 20. The endless track claimed in claim 1, wherein the inner side comprises a rolling surface for supporting the plurality of roller wheels as the plurality of roller wheels roll on the inner side, the recess being located below the rolling surface. 21. A core for an endless track for traction of a work vehicle, the endless track comprising a ground-engaging outer side for engaging the ground and an inner side for facing a plurality of wheels of the work vehicle, the plurality of wheels including a drive wheel for driving the endless track and a plurality of roller wheels for rolling on the inner side to apply a bottom run of the endless track onto the ground, the endless track comprising a body of elastomeric material extending between the inner side and the ground-engaging outer side, the core being at least partially embeddable in the elastomeric material and comprising: a) a pair of wings extending transversally to a longitudinal direction of the endless track when the core is in the endless track; andb) a wheel guide comprising a guide projection projecting on the inner side when the core is in the endless track, the guide projection comprising a wheel-facing side for facing the plurality of roller wheels, the wheel-facing side comprising: a wheel-contacting surface for contacting the plurality of roller wheels, the wheel-contacting surface being uneven in a widthwise direction of the core such that a first part of the wheel-contacting surface extends further towards the plurality of roller wheels than a second part of the wheel-contacting surface; anda sealing surface extending from the wheel-contacting surface and forming a recess to impede passage of grit between the wheel-facing side and a portion of the elastomeric material in the recess when the core is in the endless track, the recess being narrower than the guide projection in the widthwise direction of the core. 22. An endless track for traction of a work vehicle, the endless track comprising a ground-engaging outer side for engaging the ground and an inner side for facing a plurality of wheels of the work vehicle, the plurality of wheels including a drive wheel for driving the endless track and a plurality of roller wheels for rolling on the inner side to apply a bottom run of the endless track onto the ground, the endless track comprising: a) a body of elastomeric material extending between the inner side and the ground-engaging outer side; andb) a plurality of cores at least partially embedded in the elastomeric material, each core of the plurality of cores comprising: i. a pair of wings extending transversally to a longitudinal direction of the endless track; andii. a wheel guide comprising a guide projection projecting on the inner side, the guide projection comprising a wheel-facing side for facing the plurality of roller wheels, the wheel-facing side comprising: a wheel-contacting surface for contacting the plurality of roller wheels, the wheel-contacting surface forming a protrusion protruding from an adjacent part of the wheel-contacting surface; anda sealing surface extending from the wheel-contacting surface and forming a recess to impede passage of grit between the wheel-facing side and a portion of the elastomeric material in the recess, the recess being narrower than the guide projection in a widthwise direction of the core. 23. The endless track claimed in claim 22, wherein the recess extends from a bottom edge of the protrusion. 24. The endless track claimed in claim 22, wherein the protrusion protrudes increasingly in a direction towards a base of the guide projection. 25. The endless track claimed in claim 22, wherein the protrusion includes a generally flat wheel-contacting face. 26. The endless track claimed in claim 22, wherein the recess has a depth in a longitudinal direction of the core, the guide projection has a thickness in the longitudinal direction of the core at a top edge of the recess, and a ratio of the depth of the recess to the thickness of the guide projection is at least 0.05. 27. The endless track claimed in claim 26, wherein the ratio of the depth of the recess to the thickness of the guide projection is at least 0.10. 28. The endless track claimed in claim 27, wherein the ratio of the depth of the recess to the thickness of the guide projection is at least 0.20. 29. The endless track claimed in claim 22, wherein the recess has a depth in a longitudinal direction of the core of at least 5 mm. 30. The endless track claimed in claim 29, wherein the depth of the recess is at least 10 mm. 31. The endless track claimed in claim 22, wherein the recess has the width in a widthwise direction of the core at a top edge of the recess, the wheel-facing side has a width in the widthwise direction of the core at the top edge of the recess, and the width of the recess is at least one-quarter of the width of the wheel-facing side. 32. The endless track claimed in claim 31, wherein the width of the recess is at least one-half of the width of the wheel-facing side. 33. The endless track claimed in claim 22, wherein, when the endless track is new, the wheel-contacting surface is at least partially covered by a portion of the elastomeric material expected to wear out as the plurality of roller wheels roll on the inner side and contact the guide projection. 34. The endless track claimed in claim 22, wherein the guide projection is a first guide projection and the plurality of roller wheels is a first plurality of roller wheels, the plurality of wheels of the work vehicle including a second plurality of roller wheels for rolling on the inner side to apply the bottom run of the endless track onto the ground, the wheel guide comprising a second guide projection projecting on the inner side and spaced apart from the first guide projection in a longitudinal direction of the core, the second guide projection comprising a wheel-facing side for facing the second plurality of roller wheels, the wheel-facing side of the second guide projection comprising: a wheel-contacting surface for contacting the second plurality of roller wheels, the wheel-contacting surface of the second guide projection forming a protrusion protruding from an adjacent part of the wheel-contacting surface of the second guide projection; anda sealing surface extending from the wheel-contacting surface of the second guide projection and forming a recess to impede passage of grit between the wheel-facing side of the second guide projection and a portion of the elastomeric material in the recess of the second guide projection. 35. The endless track claimed in claim 22, wherein the elastomeric material includes rubber. 36. A work vehicle comprising the endless track claimed in claim 22. 37. The work vehicle claimed in claim 36, wherein the work vehicle is a construction vehicle, an agricultural vehicle, a forestry vehicle or a military vehicle. 38. The endless track claimed in claim 22, wherein the recess prevents the plurality of roller wheels from contacting the wheel-facing side below a top edge of the recess. 39. The endless track claimed in claim 22, wherein the protrusion is located in a central region of the wheel-contacting surface in a widthwise direction of the core. 40. The endless track claimed in claim 22, wherein the inner side comprises a rolling surface for supporting the plurality of roller wheels as the plurality of roller wheels roll on the inner side, the recess being located below the rolling surface. 41. A core for an endless track for traction of a work vehicle, the endless track comprising a ground-engaging outer side for engaging the ground and an inner side for facing a plurality of wheels of the work vehicle, the plurality of wheels including a drive wheel for driving the endless track and a plurality of roller wheels for rolling on the inner side to apply a bottom run of the endless track onto the ground, the endless track comprising a body of elastomeric material extending between the inner side and the ground-engaging outer side, the core being at least partially embeddable in the elastomeric material and comprising: a) a pair of wings extending transversally to a longitudinal direction of the endless track when the core is in the endless track; andb) a wheel guide comprising a guide projection projecting on the inner side when the core is in the endless track, the guide projection comprising a wheel-facing side for facing the plurality of roller wheels, the wheel-facing side comprising: a wheel-contacting surface for contacting the plurality of roller wheels, the wheel-contacting surface forming a protrusion protruding from an adjacent part of the wheel-contacting surface; anda sealing surface extending from the wheel-contacting surface and forming a recess to impede passage of grit between the wheel-facing side and a portion of the elastomeric material in the recess when the core is in the endless track, the recess being narrower than the guide projection in a widthwise direction of the core. 42. An endless track for traction of a vehicle, the endless track comprising a ground-engaging outer side for engaging the ground and an inner side for facing a plurality of wheels of the vehicle, the plurality of wheels including a drive wheel for driving the endless track and a plurality of roller wheels for rolling on the inner side to apply a bottom run of the endless track onto the ground, the endless track comprising: a) a body of elastomeric material extending between the inner side and the ground-engaging outer side; andb) a plurality of cores at least partially embedded in the elastomeric material, each core of the plurality of cores comprising: i. a pair of wings extending transversally to a longitudinal direction of the endless track; andii. a wheel guide comprising a guide projection projecting on the inner side, the guide projection comprising a wheel-facing side for facing the plurality of roller wheels, the wheel-facing side comprising a recess configured to prevent the plurality of roller wheels from contacting a portion of the wheel-facing side extending below a top of the recess and along at least a majority of a dimension of the wheel-facing side in the widthwise direction of the core below the top of the recess, the recess being narrower than the guide projection in the widthwise direction of the core. 43. The endless track claimed in claim 42, wherein the wheel-facing side comprises a wheel-contacting surface above the recess and uneven in the widthwise direction of the core such that a given part of the wheel-contacting surface extends further towards the plurality of roller wheels than an adjacent part of the wheel-contacting surface. 44. The endless track claimed in claim 43, wherein the given part of the wheel-contacting surface forms a wheel-contacting protrusion protruding from the adjacent part of the wheel-contacting surface. 45. The endless track claimed in claim 44, wherein the wheel-contacting protrusion protrudes increasingly in a direction towards a base of the guide projection. 46. The endless track claimed in claim 44, wherein the wheel-contacting protrusion includes a generally flat wheel-contacting face. 47. The endless track claimed in claim 44, wherein the wheel-contacting protrusion is substantially centered in the wheel-facing side in the widthwise direction of the core. 48. The endless track claimed in claim 42, wherein the recess has a depth in a longitudinal direction of the core, the guide projection has a thickness in the longitudinal direction of the core at the top of the recess, and a ratio of the depth of the recess to the thickness of the guide projection is at least 0.05. 49. The endless track claimed in claim 48, wherein the ratio of the depth of the recess to the thickness of the guide projection is at least 0.10. 50. The endless track claimed in claim 49, wherein the ratio of the depth of the recess to the thickness of the guide projection is at least 0.20. 51. The endless track claimed in claim 42, wherein the recess has a depth in a longitudinal direction of the core of at least 5 mm. 52. The endless track claimed in claim 51, wherein the depth of the recess is at least 10 mm. 53. The endless track claimed in claim 42, wherein a width of the recess in the widthwise direction of the core is at least one-quarter of a width of the wheel-facing side in the widthwise direction of the core at the top of the recess. 54. The endless track claimed in claim 53, wherein the width of the recess is at least one-third of the width of the wheel-facing side. 55. The endless track claimed in claim 54, wherein the width of the recess is at least one-half of the width of the wheel-facing side. 56. The endless track claimed in claim 42, wherein, when the endless track is new, the guide projection is at least partially covered by a portion of the elastomeric material expected to wear out as the plurality of roller wheels roll on the inner side and contact the guide projection. 57. The endless track claimed in claim 42, wherein the guide projection is a first guide projection and the plurality of roller wheels is a first plurality of roller wheels, the plurality of wheels of the vehicle including a second plurality of roller wheels for rolling on the inner side to apply the bottom run of the endless track onto the ground, the wheel guide comprising a second guide projection projecting on the inner side and spaced apart from the first guide projection in a longitudinal direction of the core, the second guide projection comprising a wheel-facing side for facing the second plurality of roller wheels, the wheel-facing side of the second guide projection comprising a recess configured to prevent the second plurality of roller wheels from contacting a portion of the wheel-facing side of the second guide projection extending below a top of the recess of the second guide projection and along at least a majority of a dimension of the wheel-facing side of the second guide projection in the widthwise direction of the core below the top of the recess of the second guide projection, the recess of the second guide projection being narrower than the second guide projection in the widthwise direction of the core. 58. The endless track claimed in claim 42, wherein the recess is configured to prevent the plurality of roller wheels from contacting the wheel-facing side below the top of the recess. 59. The endless track claimed in claim 42, wherein a width of the recess in the widthwise direction of the core is less than half of a width of the guide projection in the widthwise direction of the core at the top of the recess. 60. The endless track claimed in claim 42, wherein the inner side comprises a rolling surface for supporting the plurality of roller wheels as the plurality of roller wheels roll on the inner side, the recess being located below the rolling surface. 61. An endless track for traction of a vehicle, the endless track comprising a ground-engaging outer side for engaging the ground and an inner side for facing a plurality of wheels of the vehicle, the plurality of wheels including a drive wheel for driving the endless track and a plurality of roller wheels for rolling on the inner side to apply a bottom run of the endless track onto the ground, the endless track comprising: a) a body of elastomeric material extending between the inner side and the ground-engaging outer side; andb) a plurality of cores at least partially embedded in the elastomeric material, each core of the plurality of cores comprising: i. a pair of wings extending transversally to a longitudinal direction of the endless track; andii. a wheel guide comprising a guide projection projecting on the inner side, the guide projection comprising a wheel-facing side for facing the plurality of roller wheels, the wheel-facing side comprising: an upper surface uneven in a widthwise direction of the core such that a given part of the upper surface extends further towards the plurality of roller wheels than an adjacent part of the upper surface; anda lower surface forming a recess, the recess being narrower than the guide projection in the widthwise direction of the core. 62. The endless track claimed in claim 61, wherein the given part of the upper surface forms a wheel-contacting protrusion protruding from the adjacent part of the upper surface. 63. The endless track claimed in claim 62, wherein the wheel-contacting protrusion protrudes increasingly in a direction towards a base of the guide projection. 64. The endless track claimed in claim 62, wherein the wheel-contacting protrusion includes a generally flat wheel-contacting face. 65. The endless track claimed in claim 62, wherein the wheel-contacting protrusion is substantially centered in the wheel-facing side in the widthwise direction of the core. 66. The endless track claimed in claim 61, wherein the recess has a depth in a longitudinal direction of the core, the guide projection has a thickness in the longitudinal direction of the core at a top of the recess, and a ratio of the depth of the recess to the thickness of the guide projection is at least 0.05. 67. The endless track claimed in claim 66, wherein the ratio of the depth of the recess to the thickness of the guide projection is at least 0.10. 68. The endless track claimed in claim 67, wherein the ratio of the depth of the recess to the thickness of the guide projection is at least 0.20. 69. The endless track claimed in claim 61, wherein the recess has a depth in a longitudinal direction of the core of at least 5 mm. 70. The endless track claimed in claim 69, wherein the depth of the recess is at least 10 mm. 71. The endless track claimed in claim 61, wherein a width of the recess in the widthwise direction of the core is at least one-quarter of a width of the wheel-facing side in the widthwise direction of the core at a top of the recess. 72. The endless track claimed in claim 71, wherein the width of the recess is at least one-third of the width of the wheel-facing side. 73. The endless track claimed in claim 72, wherein the width of the recess is at least one-half of the width of the wheel-facing side. 74. The endless track claimed in claim 61, wherein, when the endless track is new, the guide projection is at least partially covered by a portion of the elastomeric material expected to wear out as the plurality of roller wheels roll on the inner side and contact the guide projection. 75. The endless track claimed in claim 61, wherein the guide projection is a first guide projection and the plurality of roller wheels is a first plurality of roller wheels, the plurality of wheels of the vehicle including a second plurality of roller wheels for rolling on the inner side to apply the bottom run of the endless track onto the ground, the wheel guide comprising a second guide projection projecting on the inner side and spaced apart from the first guide projection in a longitudinal direction of the core, the second guide projection comprising a wheel-facing side for facing the second plurality of roller wheels, the wheel-facing side of the second guide projection comprising: an upper surface uneven in a widthwise direction of the core such that a given part of the upper surface of the wheel-facing side of the second guide projection extends further towards the plurality of roller wheels than an adjacent part of the upper surface of the wheel-facing side of the second guide projection; anda lower surface forming a recess, the recess of the second guide projection being narrower than the second guide projection in the widthwise direction of the core. 76. The endless track claimed in claim 61, wherein the recess is configured to prevent the plurality of roller wheels from contacting the wheel-facing side below a top of the recess. 77. The endless track claimed in claim 61, wherein a width of the recess in the widthwise direction of the core is less than half of a width of the guide projection in the widthwise direction of the core at a top of the recess. 78. The endless track claimed in claim 61, wherein the inner side comprises a rolling surface for supporting the plurality of roller wheels as the plurality of roller wheels roll on the inner side, the recess being located below the rolling surface.
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