IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0301866
(1994-09-06)
|
우선권정보 |
JP-0247515 (1993-09-08) |
발명자
/ 주소 |
- Kimoto Kenzo (Hirakata JPX)
|
출원인 / 주소 |
- Kabushiki Kaisha Komatsu Seisakusho (Tokyo JPX 03)
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
0 |
초록
▼
A twin-scrape dozer, capable of maintaining a satisfactory balance during earth loading, of loading a larger quantity of earth, of efficiently conveying earth even over a soft ground, and of adjusting the rate at which earth is scattered, has a crawler type tractor (1, 1A) equipped with a traveling
A twin-scrape dozer, capable of maintaining a satisfactory balance during earth loading, of loading a larger quantity of earth, of efficiently conveying earth even over a soft ground, and of adjusting the rate at which earth is scattered, has a crawler type tractor (1, 1A) equipped with a traveling mechanism, a front earth loading and ejecting device (10, 50), and a rear earth loading and ejecting device (30, 70). The traveling mechanism has track frames (2, 2A) at right and left sides of the vehicle (1, 1A), track shoes (5, 5A) and drive units (6, 6A). The earth loading and ejecting devices are provided at the front and rear parts of the vehicle (1, 1A), and are installed to be vertically movable with lift cylinders (13, 33, 56, 78). Each of the earth loading and ejecting devices is provided with a scraper (21, 34, 53, 75) and a bowl member (14, 41, 61, 81) pivotably connected together by pivot pins (22, 42, 62, 83). Each scraper (21, 34, 53, 75) and bowl member (14, 41, 61, 81) are controlled by a bowl cylinder (23, 43, 63, 84), so that the bottom of the bowls (20, 40, 60, 80) can be opened and closed by extending and retracting the respective bowl cylinders (23, 43, 63, 84). The excavating angle of the scrapers (21, 34, 53, 72) can be changed by extending and retracting the tilt cylinders (16, 36) or by adjusting the length of variable length braces (57, 73).
대표청구항
▼
A twin-scrape dozer comprising: a crawler tractor equipped with a traveling mechanism comprising left and right track frames provided at right and left sides of said crawler tractor, left and right track shoes, and left and right drive units; a front earth loading and ejecting device mounted on a fr
A twin-scrape dozer comprising: a crawler tractor equipped with a traveling mechanism comprising left and right track frames provided at right and left sides of said crawler tractor, left and right track shoes, and left and right drive units; a front earth loading and ejecting device mounted on a front portion of said crawler tractor; at least one front lift cylinder for vertically moving said front earth loading and ejecting device; a rear earth loading and ejecting device mounted on a rear portion of said crawler tractor; and at least one rear lift cylinder for vertically moving said rear earth loading and ejecting device; wherein said front earth loading and ejecting device comprises a front scraper, said front scraper having a cutting edge at a forward bottom end thereof, a front bowl member pivotably connected to the front scraper by at least one front pivot pin, and at least one front bowl cylinder for providing relative movement between the front scraper and the front bowl member about the at least one front pivot pin in response to extending and retracting of said at least one front bowl cylinder so as to move a bottom portion of the front scraper and a bottom portion of the front bowl member away from each other to form a front ejection port and toward each other to close the front ejection port, and wherein said rear earth loading and ejecting device comprises a rear scraper, said rear scraper having a cutting edge at a forward bottom end thereof a rear bowl member pivotably connected to the rear scraper by at least one rear pivot pin, and at least one rear bowl cylinder for providing relative movement between the rear scraper and the rear bowl member about the at least one rear pivot pin in response to extending and retracting of said at least one rear bowl cylinder so as to move a bottom portion of the rear scraper and a bottom portion of the rear bowl member away from each other to form a rear ejection port and toward each other to close the rear ejection port; whereby said front earth loading and ejecting device and said rear earth loading and ejecting device can be simultaneously utilized in an earth excavating and loading operation to load excavated material into said front bowl member and said rear bowl member while said crawler tractor is moving forwardly; and whereby said front earth loading and ejecting device and said rear earth loading and ejecting device can be simultaneously maintained in an elevated traveling position in a traveling and conveying operation with loaded excavated material in each of said front bowl member and said rear bowl member and with the center of gravity of the thus loaded dozer being near the center of the dozer so that the dozer is well balanced during travel.
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