A frame assembly is described including a tunnel, an engine cradle disposed forward of the tunnel and connected thereto, and a sub-frame disposed forward of the engine cradle and connected thereto. A forward support assembly extends upwardly from the subframe. An upper column extends upwardly from t
A frame assembly is described including a tunnel, an engine cradle disposed forward of the tunnel and connected thereto, and a sub-frame disposed forward of the engine cradle and connected thereto. A forward support assembly extends upwardly from the subframe. An upper column extends upwardly from the engine cradle to connect with the forward support assembly. A rear brace assembly extends upwardly from the tunnel to connect with the forward support assembly and the upper column. In one embodiment, the frame assembly further includes an engine disposed in the engine cradle. An endless track is operatively connected to the engine and disposed beneath the tunnel for propulsion. A pair of skis is operatively connected to a steering device for steering. In another embodiment, the frame assembly further includes an engine disposed in the engine cradle. A rear wheel is operatively connected to the engine and disposed beneath the tunnel for propulsion, and two front wheels are operatively connected to a steering device for steering.
대표청구항▼
What is claimed is: 1. A snowmobile, comprising: a frame including a tunnel and an engine cradle forward of the tunnel; an engine mounted in the engine cradle; a drive track disposed below and supported by the tunnel and connected operatively to the engine for propulsion of the snowmobile; left and
What is claimed is: 1. A snowmobile, comprising: a frame including a tunnel and an engine cradle forward of the tunnel; an engine mounted in the engine cradle; a drive track disposed below and supported by the tunnel and connected operatively to the engine for propulsion of the snowmobile; left and right skis disposed on the frame; a straddle seat disposed on the tunnel above the drive track and rearward of the engine; a pair of footrests supported by the frame; a steering column movably connected to the frame and operatively connected to the two skis; a handlebar connected to the steering column; a brace assembly connected to the frame, the assembly including: left and right rear legs extending forwardly and upwardly from the tunnel, and left and right front legs extending rearwardly and upwardly from the frame forward of the tunnel, each of the left and right front legs having a front end and a rear end, the front ends of the front legs being spaced further from each other than the rear ends of the front legs. 2. The snowmobile of claim 1, wherein the brace assembly further includes a cross-member interconnecting the front legs. 3. The snowmobile of claim 1, wherein the legs of the brace assembly form an apex not forward of the engine. 4. The snowmobile of claim 1, wherein the front legs of the brace assembly are forward of and above the steering column. 5. The snowmobile of claim 1, wherein the rear ends of the front legs of the brace assembly and the front ends of the rear legs of the brace assembly are interconnected. 6. The snowmobile of claim 1, wherein the rear ends of the front legs of the brace assembly and the front ends of the rear legs of the brace assembly are interconnected and form an apex not forward of the engine. 7. The snowmobile of claim 6, further comprising an upper column extending upwardly from the frame. 8. The snowmobile of claim 7, wherein the upper column forms the apex with the front ends of the rear legs of the brace assembly and the rear ends of the front legs of the brace assembly. 9. The snowmobile of claim 2, wherein: the frame further includes a sub-frame forward of the engine cradle, the snowmobile further comprises left and right suspension arms pivotally connected to the sub-frame on respective sides of the sub-frame, and the left and right skis are disposed on the frame via a connection to the respective suspension arm. 10. The snowmobile of claim 3, wherein: the frame further includes a sub-frame forward of the engine cradle, the snowmobile further comprises left and right suspension arms pivotally connected to the sub-frame on respective sides of the sub-frame, and the left and right skis are disposed on the frame via a connection to the respective suspension arm. 11. The snowmobile of claim 4, wherein: the frame further includes a sub-frame forward of the engine cradle, the snowmobile further comprises left and right suspension arms pivotally connected to the sub-frame on respective sides of the sub-frame, and the left and right skis are disposed on the frame via a connection to the respective suspension arm. 12. The snowmobile of claim 5, wherein: the frame further includes a sub-frame forward of the engine cradle, the snowmobile further comprises left and right suspension arms pivotally connected to the sub-frame on respective sides of the sub-frame, and the left and right skis are disposed on the frame via a connection to the respective suspension arm. 13. The snowmobile of claim 6, wherein: the frame further includes a sub-frame forward of the engine cradle, the snowmobile further comprises left and right suspension arms pivotally connected to the sub-frame on respective sides of the sub-frame, and the left and right skis are disposed on the frame via a connection to the respective suspension arm. 14. The snowmobile of claim 7, wherein: the frame further includes a sub-frame forward of the engine cradle, the snowmobile further comprises left and right suspension arms pivotally connected to the sub-frame on respective sides of the sub-frame, and the left and right skis are disposed on the frame via a connection to the respective suspension arm. 15. The snowmobile of claim 8, wherein: the frame further includes a sub-frame forward of the engine cradle, the snowmobile further comprises left and right suspension arms pivotally connected to the sub-frame on respective sides of the sub-frame, and the left and right skis are disposed on the frame via a connection to the respective suspension arm. 16. A snowmobile, comprising: a frame including a tunnel, an engine cradle forward of the tunnel and a sub-frame forward of the engine cradle; an engine mounted in the engine cradle; a drive track disposed below and supported by the tunnel and connected operatively to the engine for propulsion of the snowmobile; left and right skis disposed on the frame; a straddle seat disposed on the tunnel above the drive track and rearward of the engine; a pair of footrests supported by the frame; a steering column movably connected to the frame and operatively connected to the two skis; a handlebar connected to the steering column; left and right suspension arms pivotally connected to the subframe on respective sides of the sub-frame, the left and right skis disposed on the frame via a connection to the respective suspension arm; left and right shock absorbers operatively connected at first ends to respective left and right skis and connect at second ends to respective sides of the subframe; and a brace assembly including: left and right rear legs extending forwardly and upwardly from the tunnel, and left and right front legs extending rearwardly and upwardly from the subframe forward of the tunnel. 17. The snowmobile of claim 16, wherein each of the left and right front legs have a front end and a rear end, the front ends of the front legs being spaced further from each other than the rear ends of the front legs. 18. The snowmobile of claim 17, further comprising an upper column extending upwardly from the frame between the front ends of the front legs and the rear ends of the rear legs of the brace assembly, the upper column being connected to the front ends of the rear legs and the rear ends of the front legs. 19. The snowmobile of claim 18, wherein the connection between the upper column and the front and rear legs is above the engine. 20. The snowmobile of claim 18, wherein the upper column forms an apex with the front ends of the rear legs and the rear ends of the front legs of the brace assembly.
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이 특허에 인용된 특허 (27)
Tsukahara Takeshi (Kawagoe JPX) Takeuchi Tsutomu (Asaka JPX) Murase Kikuo (Tokyo JPX), Body frame for vehicles.
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