A two-wheeled motorized scooter is disclosed as an off-road vehicle capable of off-road use. The off-road vehicle utilizes a rigid chassis, a motor and transmission offering both low end torque and structural rigidity, and a suspension assembly capable of offering handling and control necessary for
A two-wheeled motorized scooter is disclosed as an off-road vehicle capable of off-road use. The off-road vehicle utilizes a rigid chassis, a motor and transmission offering both low end torque and structural rigidity, and a suspension assembly capable of offering handling and control necessary for typical off-road use.
대표청구항▼
1. An off-road vehicle comprising: a rigid chassis defining a step-through space;a standing platform arranged at a bottom of said step-through space;a front fork having a rotatable front wheel and a steering handle positioned for use by a standing rider;a rear swingarm having a rotatable rear wheel,
1. An off-road vehicle comprising: a rigid chassis defining a step-through space;a standing platform arranged at a bottom of said step-through space;a front fork having a rotatable front wheel and a steering handle positioned for use by a standing rider;a rear swingarm having a rotatable rear wheel, said rear swingarm pivotally attached to said chassis about a swingarm axle;a suspension assembly positioned between said rear swingarm and said chassis, said suspension assembly further comprising a pivot member, a linkage member, and a shock absorption means;a powertrain having a motor and a continuously variable transmission, said powertrain fixedly mounted to said chassis above said suspension assembly and operationally connected to said rear wheel;said shock absorption means further comprising a shock and spring positioned below and parallel to said standing platform, said shock absorption means having a first and second end, said first end fixedly attached to said chassis, said second end pivotally attached to said pivot member, said pivot member pivotally attached to said linkage member and pivotally attached to said chassis, and said linkage member pivotally attached to said rear swingarm;wherein said powertrain and rear wheel maintain a constant distance from each other, and wherein said shock absorption means utilizes said pivot member and said linkage member to control a motion of said rear swingarm about said swingarm axle to be within an angle range of 0 to 45 degrees. 2. The off-road vehicle of claim 1, wherein said transmission further comprises: a driver sprocket coupled to said motor;a driven sprocket coupled to said swingarm axle;wherein said driver and driven sprockets are aligned along a common vertical axis. 3. The off-road vehicle of claim 2 further comprising: a front sprocket coupled to said swingarm axle;a rear sprocket coupled to said rear wheel; wherein said front sprocket and said driven sprocket share a common center of circumference and wherein said driven sprocket and said rear sprocket are spaced apart from each other at a fixed distance. 4. The off-road vehicle of claim 3, wherein said powertrain delivers power to said driver sprocket, which delivers power to said driven sprocket, which delivers power to said front sprocket, which delivers power to said rear sprocket, which delivers power to said wheel, wherein said sprockets are positioned in close proximity to reduce obstruction and complexity of the power delivery of the off-road vehicle. 5. The off-road vehicle of claim 1, wherein said pivot member further comprises a pivot axle for rotatable attachment to said chassis. 6. The off-road vehicle of claim 5, wherein said pivot member and linkage member translate a horizontal force of said shock absorption means into a vertical force by pivoting along the pivot axle and the swingarm axle, said vertical force applied to said rear wheel through said rear swingarm. 7. The off-road vehicle of claim 6, wherein said linkage member provides an amount of distance between said rear swingarm and said pivot member which prevents lockup of the suspension assembly. 8. The off-road vehicle of claim 5, wherein said pivot member is attached directly to said rear swingarm. 9. The off-road vehicle of claim 1, wherein said front and rear wheels are between 17 and 23 inches in diameter. 10. The off-road vehicle of claim 1, wherein said steering handle is spaced between 12 and 16 inches from said front fork. 11. The off-road vehicle of claim 1, wherein said shock absorption means has an adjustable length. 12. The off-road vehicle of claim 1, wherein said linkage member has an adjustable length. 13. An off-road vehicle comprising: a rigid chassis defining a step-through space;a standing platform arranged at a bottom of said step-through space;a front fork having a rotatable front wheel and a steering handle positioned for use by a standing rider;a rear swingarm having a rotatable rear wheel, said rear swingarm pivotally attached to said chassis about a swingarm axle;a suspension assembly positioned between said rear swingarm and said chassis, said suspension assembly further comprising a pivot member, a linkage member, and a shock absorption means;a powertrain having a motor and a continuously variable transmission, said powertrain fixedly mounted to said chassis above said suspension assembly and operationally connected to said rear wheel;said shock absorption means having a shock and spring positioned below and parallel to said standing platform, said shock absorption means having a first and second end;said first end fixedly attached to said chassis;said second end pivotally attached to said pivot member;said pivot member pivotally attached to said linkage member and pivotally attached to said chassis;said linkage member pivotally attached to said rear swingarm;a driver sprocket coupled to said motor;a driven sprocket coupled to said swingarm axle;a front sprocket coupled to said swingarm axle;a rear sprocket coupled to said rear wheel;wherein said shock absorption means utilizes said pivot member and said linkage member to control a motion of said rear swingarm about said swingarm axle to be within an angle range of 0 to 45 degrees. 14. The off-road vehicle of claim 13, wherein said powertrain delivers power to said driver sprocket, which delivers power to said driven sprocket, which delivers power to said front sprocket, which delivers power to said rear sprocket, which delivers power to said rear wheel. 15. The off-road vehicle of claim 14, wherein said pivot member and linkage member translate a horizontal force of said shock absorption means into a vertical force by pivoting along a pivot axle and the swingarm axle, said vertical force applied to said rear wheel through said rear swingarm.
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