Blade apparatus for work machine and work machine having the same
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
E02F-003/76
E01H-005/06
출원번호
UP-0072966
(2005-03-03)
등록번호
US-7810581
(2010-11-01)
우선권정보
JP-2004-350129(2004-12-02)
발명자
/ 주소
Matsumoto, Norihisa
Wada, Tatsuo
출원인 / 주소
Komatsu Ltd.
대리인 / 주소
Fish & Richardson P.C.
인용정보
피인용 횟수 :
4인용 특허 :
3
초록▼
The blade apparatus includes a connection blade portion which is provided at its lower end with a central blade portion including a straight first cutting edge and having a second cutting edge which extends continuously with the first cutting edge through a predetermined angle rearwardly, and an end
The blade apparatus includes a connection blade portion which is provided at its lower end with a central blade portion including a straight first cutting edge and having a second cutting edge which extends continuously with the first cutting edge through a predetermined angle rearwardly, and an end blade portion having a third cutting edge which extends continuously with a second cutting edge through a predetermined angle forwardly, wherein front surfaces of the blade portions are concave curved surfaces which are continuous from the upper end to the lower end, across line between the connection blade portion and the end blade portion and a cross point between the second cutting edge and the third cutting edge are located rearward of the cross point of the first cutting edge and the cross line between the central blade portion and the connection blade portion, and at least a central main region of the central blade portion is made of steel plate, and at least the connection blade portion and the end blade portion are integrally cast together with a back surface support portion and first and second brackets thereof.
대표청구항▼
What is claimed is: 1. A blade apparatus for a work machine, the blade apparatus mounted on various work machines, wherein the blade apparatus comprises: a central front surface portion, and a connecting front surface portion, and end front surface portions, each of which are bent and continuously
What is claimed is: 1. A blade apparatus for a work machine, the blade apparatus mounted on various work machines, wherein the blade apparatus comprises: a central front surface portion, and a connecting front surface portion, and end front surface portions, each of which are bent and continuously provided on each of right and left ends of the central front surface portion in succession; the central front surface portion has a blade width whose lower end intersects with a digging direction and extends laterally, and is provided at a further lower end of said lower end with a first cutting edge; the connecting front surface portion is disposed on each of the right and left ends of the central front surface portion, and a second cutting edge provided at a lower end of the connecting front surface portion; the end front surface portion is continuously formed on the connecting front surface portion and is provided at its lower end with a third cutting edge; a cross line between the connecting front surface portion and the end front surface portion and a cross point between blade edges of the second cutting edge and the third cutting edge are located on retreat positions rearward of a blade edge of the first cutting edge as viewed from above; respective front surfaces of the central front surface portion, the connecting front surface portion and the end front surface portion have a central blade portion formed on vertically continuous concave curved surfaces and an end blade portion which is continuously formed on each of right and left ends of the central blade portion through a connection blade portion; and a blade that comprises: a pair of right and left integral castings which include at least all of the connection blade portion and the end blade portions, and a region of right and left connecting side end portion of the central blade portion; a plate portion including at least a main region which excludes the region of right and left connecting side end portion of the central blade portion, and having a connection end surface connected to a connection end surface of the integral casting, and a connection line between the each connecting end surface of the integral casting and the each connecting end surface of the plate portion is located on a vertical straight line as viewed from front, wherein a back surface support member is disposed on a back surface of the plate portions such that the back surface support member and the back surface of the integral casting are flush with respect to each other. 2. The blade apparatus for the work machine according to claim 1, wherein brackets which pivotally support ends of right and left lift frames and various hydraulic cylinders are integrally cast on a back surface portion of the integral casting. 3. The blade apparatus for the work machine according to claim 2, wherein a blade portion on which a maximum load of the integral casting is applied and the back surface portion are formed into at least a continuous solid structure. 4. The blade apparatus for the work machine according to claim 1, wherein a plurality of reinforcing ribs are disposed between at least a portion of the plate portion and at least a portion of the back surface support member. 5. The blade apparatus for the work machine according to claim 4, wherein at least a portion of the back surface support member and the plurality of reinforcing ribs are formed as an integral casting. 6. The blade apparatus for the work machine of claim 1, wherein respective blade portion front surfaces of the central blade portion, the connection blade portion and the end blade portion are vertically continuous concave curved surfaces having a same curvature. 7. The blade apparatus for the work machine of claim 1, wherein the central blade portion, the connection blade portion and the end blade portion are continuously formed into a V-shape or a U-shape, respectively. 8. A work machine comprising a blade apparatus, wherein the blade apparatus comprises: a central front surface portion, and a connecting front surface portion, and end front surface portions, each of which are bent and continuously provided on each of right and left ends of the central front surface portion in succession; the central front surface portion has a blade width whose lower end intersects with a digging direction and extends laterally, and is provided at a further lower end of said lower end with a first cutting edge; the connecting front surface portion is disposed on each of the right and left ends of the central front surface portion, and a second cutting edge provided at a lower end of the connecting front surface portion; the end front surface portion is continuously formed on the connecting front surface portion and is provided at its lower end with a third cutting edge; a cross line between the connecting front surface portion and the end front surface portion and a cross point between blade edges of the second cutting edge and the third cutting edge are located on retreat positions rearward of a blade edge of the first cutting edge as viewed from above; respective front surfaces of the central front surface portion, the connecting front surface portion and the end front surface portion have a central blade portion formed on vertically continuous concave curved surfaces and an end blade portion which is continuously formed on each of right and left ends of the central blade portion through a connection blade portion; and a blade that comprises: a pair of right and left integral castings which include at least all of the connection blade portion and the end blade portions, and a region of right and left connecting side end portion of the central blade portion a plate portion including at least a main region which excludes the region of right and left connecting side end portion of the central blade portion, and having a connection end surface connected to a connection end surface of the integral casting, and a connection line between the each connecting end surface of the integral casting and the each connecting end surface of the plate portion is located on a vertical straight line as viewed from front, wherein a back surface support member is disposed on a back surface of the plate portions such that the back surface support member and the back surface of the integral casting are flush with respect to each other. 9. The work machine according to claim 8, wherein brackets which pivotally support ends of right and left lift frames and various hydraulic cylinders are integrally cast on a back surface portion of the integral casting. 10. The work machine according to claim 9, wherein a blade portion on which a maximum load of the integral casting is applied and the back surface portion are formed into at least a continuous solid structure. 11. The work machine according to claim 8, wherein a plurality of reinforcing ribs are disposed between at least a portion of the plate portion and at least a portion of the back surface support member. 12. The work machine according to claim 11, wherein at least a portion of the back surface support member and the plurality of reinforcing ribs are formed as an integral casting. 13. The work machine according to claim 8, wherein respective blade portion front surfaces of the central blade portion, the connection blade portion and the end blade portion are vertically continuous concave curved surfaces having a same curvature. 14. The work machine according to claim 8, wherein the central blade portion, the connection blade portion and the end blade portion are continuously formed into a V-shape or a U-shape, respectively. 15. A blade included in a blade apparatus for a work machine, the blade comprising: a pair of right and left integral castings which include: a connection blade portion, end blade portions, wherein an end blade portion is continuously formed on each of right and left ends of a central blade portion that is formed on vertically continuous concave curved surfaces through the connection blade portion, and a region of right and left connecting side end portion of the central blade portion; a plate portion including: a main region which excludes a region of right and left connecting side end portion of the central blade portion, and a connection end surface connected to a connection end surface of the integral casting; and a connection line between each connecting end surface of the integral casting and each connecting end surface of the plate portion, wherein the connection line is located on a vertical straight line as viewed from front, and wherein a back surface support member is disposed on a back surface of the plate portion such that the back surface support member and the back surface of the integral casting are flush with respect to each other, wherein the blade apparatus includes: a central front surface portion, a connecting front surface portion, and end front surface portions, each of which are bent and continuously provided on each of right and left ends of the central front surface portion in succession, wherein the central front surface portion has a blade width whose lower end intersects with a digging direction and extends laterally, and is provided at a further lower end of the lower end with a first cutting edge, the end front surface portion is continuously formed on the connecting front surface portion and is provided at its lower end with a third cutting edge, and a cross line between the connecting front surface portion and the end front surface portion and a cross point between blade edges of the second cutting edge and the third cutting edge are located on retreat positions rearward of a blade edge of the first cutting edge as viewed from above, and wherein the central blade portion has respective front surfaces of the central front surface portion, the connecting front surface portion and the end front surface portion.
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이 특허에 인용된 특허 (3)
Kamikawa Nobuhisa (Hirakata JPX) Okada Toshikazu (Hirakata JPX) Nagase Hidekazu (Hirakata JPX) Kobayashi Naomi (Hirakata JPX) Itogawa Hiroshi (Kyoto JPX) Namiki Noriaki (Kyoto JPX) Matsumoto Norihisa, Blade apparatus and its control method in bulldozer.
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