A vehicle body frame of a bulldozer has a left side frame, a right side frame, a base plate, and a cross member. The left and right side frames each extend in the front and back direction. The base plate spans across between the left and right side frames. The cross member is positioned between a hy
A vehicle body frame of a bulldozer has a left side frame, a right side frame, a base plate, and a cross member. The left and right side frames each extend in the front and back direction. The base plate spans across between the left and right side frames. The cross member is positioned between a hydraulic pump and left and right hydraulic motors. The cross member protrudes upward from the base plate. The cross member spans across between the left and right side frames. The cross member has a left conduit hole and a right conduit hole which are spaced apart in a left and right direction of the bulldozer. The first and second left hydraulic fluid tubes pass through the left conduit hole. The first and second right hydraulic fluid tubes pass through the right conduit hole.
대표청구항▼
1. A bulldozer comprising: a vehicle frame body;an engine supported by the vehicle body frame;a hydraulic pump driven by the engine;a left hydraulic motor and a right hydraulic motor for movement, the left and right hydraulic motors being disposed behind the hydraulic pump, the left and right hydrau
1. A bulldozer comprising: a vehicle frame body;an engine supported by the vehicle body frame;a hydraulic pump driven by the engine;a left hydraulic motor and a right hydraulic motor for movement, the left and right hydraulic motors being disposed behind the hydraulic pump, the left and right hydraulic motors being driven using hydraulic fluid discharged from the hydraulic pump;a first left hydraulic fluid tube and a second left hydraulic fluid tube, the first and second left hydraulic fluid tubes connecting the hydraulic pump and the left hydraulic motor; anda first right hydraulic fluid tube and a second right hydraulic fluid tube, the first and second right hydraulic fluid tubes connecting the hydraulic pump and the right hydraulic motor,the vehicle body frame including a left side frame and a right side frame, the left and right side frames extending in the front and back direction,the vehicle body frame further including a base plate disposed to span across between the left and right side frames, and a cross member positioned between the hydraulic pump and the left and right hydraulic motors in a front and back direction of the bulldozer, the cross member being disposed so as to protrude upward from the base plate, the cross member being disposed to span across between the left and right side frames,the cross member including a left conduit hole and a right conduit hole, the left and right conduit holes being spaced apart in a left and right direction of the bulldozer,the first and second left hydraulic fluid tubes passing through the left conduit hole, andthe first and second right hydraulic fluid tubes passing through the right conduit hole. 2. The bulldozer according to claim 1, wherein the left hydraulic motor and the right hydraulic motor are disposed in positions which are lower than the hydraulic pump. 3. The bulldozer according to claim 2, wherein a base portion of the left conduit hole and a base portion of the right conduit hole are positioned at the same height as the base plate. 4. The bulldozer according to claim 3, wherein the cross member is a casting which is integrally formed. 5. The bulldozer according to claim 2, wherein the cross member is a casting which is integrally formed. 6. The bulldozer according to claim 1, wherein the hydraulic pump has a first left pump port, a second left pump port, a first right pump port and a second right pump port, the first and second left pump ports being provided on a left side surface of the hydraulic pump, the first and second right pump ports being provided on a right side surface of the hydraulic pump,the first left hydraulic fluid tube is connected to the first left pump port,the second left hydraulic fluid tube is connected to the second left pump port,the first right hydraulic fluid tube is connected to the first right pump port,the second right hydraulic fluid tube is connected to the second right pump port,the hydraulic pump discharges hydraulic fluid, which flows in from the first left pump port, from the second left pump port and discharges hydraulic fluid, which flows in from the second left pump port, from the first left pump port, andthe hydraulic pump discharges hydraulic fluid, which flows in from the first right pump port, from the second right pump port and discharges hydraulic fluid, which flows in from the second right pump port, from the first right pump port. 7. The bulldozer according to claim 6, wherein the first left hydraulic fluid tube and the second left hydraulic fluid tube are disposed so as not to intersect with the first right hydraulic fluid tube and the second right hydraulic fluid tube in a plan view. 8. The bulldozer according to claim 7, wherein the cross member is a casting which is integrally formed. 9. The bulldozer according to claim 6, wherein the cross member is a casting which is integrally formed. 10. The bulldozer according to claim 1, wherein the vehicle frame body has a left cover member disposed behind the left conduit hole and a right cover member disposed behind the right conduit hole, the left cover member covering a portion of the first left hydraulic fluid tube and a portion of the second left hydraulic fluid tube, the right cover member covering a portion of the first right hydraulic fluid tube and a portion of the second right hydraulic fluid tube,the left cover member and the right cover member are separated from each other in the left and right direction, andthe vehicle body frame has an opening positioned between the left cover member and the right cover member. 11. The bulldozer according to claim 10, wherein the cross member is a casting which is integrally formed. 12. The bulldozer according to claim 1, wherein the cross member is a casting which is integrally formed.
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이 특허에 인용된 특허 (11)
Stark Sheldon L. (Eureka IL), A-frame for carrying loads on a loader.
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