IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0810339
(2009-01-16)
|
등록번호 |
US-8366212
(2013-02-05)
|
우선권정보 |
JP-2008-032103 (2008-02-13) |
국제출원번호 |
PCT/JP2009/050562
(2009-01-16)
|
§371/§102 date |
20100624
(20100624)
|
국제공개번호 |
WO2009/101836
(2009-08-20)
|
발명자
/ 주소 |
- Maeda, Kazuo
- Tamaru, Masatake
|
출원인 / 주소 |
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
8 |
초록
▼
The crawler-type travel device includes a plurality of shoe plates, a first link section, a rotational wheel, and a shaft. The rotational wheel includes a first roller and a second roller. The first roller makes contact with first end portions corresponding to axial outer ends of the first link memb
The crawler-type travel device includes a plurality of shoe plates, a first link section, a rotational wheel, and a shaft. The rotational wheel includes a first roller and a second roller. The first roller makes contact with first end portions corresponding to axial outer ends of the first link members forming the first link section. The second roller is aligned with and disposed on the axial inner side of the first roller. The second roller is rotatable independently from the first roller. The second roller makes contact with second end portions corresponding to axial inner ends of the first link members.
대표청구항
▼
1. A crawler-type travel device comprising: a plurality of shoe plates;a first link section coupling the shoe plates in an endless loop shape;a rotational wheel configured to be rotated in conjunction with movement of the first link section while making contact with the first link section; anda shaf
1. A crawler-type travel device comprising: a plurality of shoe plates;a first link section coupling the shoe plates in an endless loop shape;a rotational wheel configured to be rotated in conjunction with movement of the first link section while making contact with the first link section; anda shaft having an inner axial end and an outer axial end, and supporting the rotational wheel while allowing the rotational wheel to rotate with respect to the shaft,the first link section including a plurality of first link members with the first link members being respectively attached to the shoe plates, the first link members being coupled to each other at end portions thereof while the end portions of the first link members are overlapped when viewed in an axial direction of the shaft, andthe rotational wheel including a first roller making contact with a first end portion of the first link section corresponding to an outer side part of the overlapped end portions of the first link members in the axial direction, anda second roller aligned with and disposed on an inner side of the first roller in the axial direction, the second roller being configured and arranged to rotate independently from the first roller, the second roller making contact with a second end portion of the first link section corresponding to an inner side part of the overlapped end portions of the first link members in the axial direction with the second end portion being overlapped with the first end portion when viewed in the axial direction. 2. The crawler-type travel device according to claim 1, further comprising a second link section inwardly spaced apart from the first link section in the axial direction, the second link section including a plurality of second link members with the second link members being respectively attached to the shoe plates, the second link members being coupled to each other at end portions thereof while the end portions are overlapped when viewed in the axial direction of the shaft,the rotational wheel further including a third roller making contact with a third end portion of the second link section corresponding to an inner side part of the overlapped end portions of the second link member in the axial direction,a fourth roller aligned with and disposed on an outer side of the third roller in the axial direction, the fourth roller being configured and arranged to rotate independently from the third roller, the fourth roller making contact with a fourth end portion of the second link section an outer side part of the overlapped end portions of the second link members in the axial direction with the second end portion being overlapped with the third end portion when viewed in the axial direction, anda spacer disposed between the second roller and the fourth roller in the axial direction, the spacer being configured and arranged to rotate independently from the second roller and the fourth roller. 3. The crawler-type travel device according to claim 1, further comprising a second link section inwardly spaced apart from the first link section in the axial direction, the second link section including a plurality of second link members with the second link members being respectively attached to the shoe plates, the second link members being coupled to each other at end portions thereof while the end portions are overlapped when viewed in the axial direction of the shaft,the rotational wheel further including a third roller making contact with a third end portion of the second link section corresponding to an inner side part of the overlapped end portions of the second link members in the axial direction,the second roller including a first roller portion aligned with and disposed on an inner side of the first roller in the axial direction, the first roller portion making contact with the second end portion of the first link section;a second roller portion aligned with and disposed on an outer side of the third roller in the axial direction, the second roller portion making contact with a fourth end portion of the second link section corresponding to an outer side part of the overlapped end portions of the second link members in the axial direction with the fourth end portion being overlapped with the third end portion when viewed in the axial direction, anda spacer portion disposed between the first roller portion and the second roller portion in the axial direction,the first roller portion, the second roller portion, and the spacer portion being formed as an integral unit, andthe second roller being configured and arranged to rotate independently from the first roller and the third roller. 4. A rotational wheel assembly adapted to support and guide a crawler belt of a crawler-type travel device, the rotational wheel assembly comprising: a rotational wheel; anda shaft having an inner axial end and an outer axial end, and supporting the rotational wheel while allowing the rotational wheel to rotate with respect to the shaft, andthe rotational wheel including a first roller and a second roller with the first roller and the second roller being aligned in an axial direction of the shaft, the first roller and the second roller being configured and arranged to rotate independently from each other, whereinthe rotational wheel is configured and arranged to be rotated in conjunction with movement of a plurality of link members respectively attached to a plurality of shoe plates with the link members being coupled to each other at end portions thereof in an endless-loop shape with the end portions being overlapped when viewed in the axial direction of the shaft,the first roller is configured and arranged to make contact with one side of the overlapped end portions of the link members in the axial direction, andthe second roller is configured and arranged to make contact with the other side of the overlapped end portions of the link members in the axial direction. 5. A rotational wheel assembly for a crawler-type travel device, comprising: a rotational wheel including a first roller, a second roller, and a third roller; anda shaft with a rotational axis having an inner axial end and an outer axial end, the shaft supporting the rotational wheel while allowing the rotational wheel to rotate about the rotational axis,the first roller being disposed onto one end of the shaft on an outer side in a direction of the rotational axis, the first roller being supported by the shaft in a rotatable state,the third roller being disposed onto the other end of the shaft on an inner side in the direction of the rotational axis, the third roller being supported by the shaft in a rotatable state,the second roller including a first roller portion, a second roller portion, and a spacer, the second roller being disposed between the first roller and the third roller, the second roller being configured and arranged to rotate about the shaft independently from the first roller and the third roller,the first roller portion of the second roller being disposed adjacent to an inner side of the first roller in the direction of the rotational axis,the second roller portion of the second roller being disposed adjacent to an outer side of the third roller in the direction of the rotational axis, andthe spacer portion being disposed between the first roller portion and the second roller portion, the spacer portion having a diameter smaller than diameters of outer peripheries of the first and second roller portions.
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