Abstract: An electric motor includes a chassis having a front tube to rotatably support a handle, two arms each having one end pivotally attached to the chassis to support two front wheels on the outer ends. A cushioning device may be used to cushion the front wheels and the arms relative to the chassis. A carrier is pivotally attached to the rear portion of the chassis, and includes a spindle to support two rear wheels. An electric motor device is attached to the carrier to drive the rear wheels. Another cushioning device may be used to cushion the rear wheels and the carrier relative to the chassis.

Abstract: A motorized vehicle includes a plurality of single-direction thrust bearings mounted between each of the two rear wheels and the propeller shaft. The single-direction thrust bearings located at one rear wheel is used to drive the motorized vehicle to move forward, and the single-direction thrust bearings located at the other rear wheel is used to drive the motorized vehicle to move backward. Thus, when the two rear wheels are subjected to a drag and cannot be rotated with the propeller shaft synchronously, the single-direction thrust bearings will idle, thereby producing a differential effect.

Abstract: A motorized beach vehicle has a gear lever clutching structure for prevention of gear slip. The gear lever, the linking arm and the swing arm are connected to form a substantially “h”-shaped structure. The gear lever may be pivoted to combine the combination stud of the swing arm with the combination hole of the combination arm, so that the gear lever may be moved to shift the universal connector of the crank so as to change the speed. After the gear lever accomplishes the gear shifting work, the combination stud is detached from the combination hole of the combination arm. Thus, the crank cannot be moved to shift gear in the gearbox due to vibration or shock applied on the vehicle body, thereby preventing from incurring gear slip of the gearbox of the motorized beach vehicle.

Abstract: A motorized cycle includes a base board, a brake crank, a first operation member, a first drive plate, two front brake wires, an oil pump, a second operation member, a second drive plate, and a rear brake wire. Thus, the two rear wheels are braked independently, and the four wheels are braked synchronously.

Abstract: A motorized beach vehicle has a gear lever clutching structure for prevention of gear slip. The gear lever, the linking arm and the swing arm are connected to form a substantially “h”-shaped structure. The gear lever may be pivoted to combine the combination stud of the swing arm with the combination hole of the combination arm, so that the gear lever may be moved to shift the universal connector of the crank so as to change the speed. After the gear lever accomplishes the gear shifting work, the combination stud is detached from the combination hole of the combination arm. Thus, the crank cannot be moved to shift gear in the gearbox due to vibration or shock applied on the vehicle body, thereby preventing from incurring gear slip of the gearbox of the motorized beach vehicle.

Abstract: An idle wheel adjustment assembly has a generally L-shaped frame, a coiled spring, an oblong rocking frame, a first shaft pin, a first bearing, a first idle wheel, a second shaft pin, a second bearing, and a second idle wheel. The generally L-shaped frame has a through hole and an end column. The oblong rocking frame has a main shaft, an upper pillar, an upper circular hole, and a lower round hole. The first bearing is inserted in the first idle wheel. The second bearing is inserted in the second idle wheel. The first shaft pin is inserted through the upper circular hole and the first bearing. The second shaft pin is inserted through the lower round hole and the second bearing. The main shaft is inserted through the through hole. The coiled spring has a first hook end connected to the upper pillar and a second hook end connected to the end column.

Abstract: The present invention relates to a reverse gear transmission device of a differential of a vehicle. The vehicle is provided with a drive shaft provided with differentials each containing an one-way thrust bearing therein. The gear shift stick of the vehicle is provided with a linking member. When the gear shift stick is moved to a reverse gear position, the linking member may be driven by a mechanic linking lever or a motorized magnet so as to move an operation member which may drive and move the clutch into the differential, so that the one-way thrust bearing may still combine with the drive shaft to transmit the power even when the vehicle is reversed.

Abstract: A sand buggy has a main frame. A pair of connection rods are disposed on the main frame. A positioning seat which is connected to the connection rods has two lower rotating shafts. A movable mount has two pairs of lug panels to receive the lower rotating shafts. Two front shock absorbers are connected to a-suspension arm and a positioning plate. A first and a second positioning mounts are disposed on the main frame. A first movable seat is inserted in the first positioning mount. A pair of first lug plates are disposed on the first suspension link. A second movable seat is inserted in the second positioning mount. A pair of second lug plates are disposed on the second suspension link. A first rear shock absorber is positioned by the first lug plates. A second rear shock absorber is positioned by the second lug plates. A main shaft is connected to the first and the second rear shock absorbers.

Abstract: A gearbox structure of a beach cycle includes a gearbox which may transmit a power of an engine to a power shaft and a propeller shaft. A clutch mounted between the change gears of the gearbox can be shifted by a gear shift device into a neutral position, a reverse gear position and a forward gear position. The gear shift device includes a gear lever which rotates a sector-shaped gear which rotates a gear shift cam shaft which is formed with a slot for driving a gear shift drive fork which shifts the clutch to the neutral position, the reverse gear position, and the forward gear position. The gearbox is further provided with a force increase gear, and the propeller shaft is additionally provided with a drive gear which meshes with a helical gear of a distance calculator which has a connecting line externally connected to an odometer.

Abstract: A gearbox structure of a beach cycle includes a gearbox which may transmit a power of an engine to a power shaft and a propeller shaft. A clutch mounted between the change gears of the gearbox can be shifted by a gear shift device into a neutral position, a reverse gear position and a forward gear position. The gear shift device includes a gear lever which rotates a sector shaped gear which rotates a gear shift cam shaft which is formed with a slot for driving a gear shift drive fork which shifts the clutch to the neutral position, the reverse gear position, and the forward gear position. The gearbox is further provided with a force increase gear, and the propeller shaft is additionally provided with a drive gear which meshes with a helical gear of a distance calculator which has a connecting line externally connected to an odometer.

Abstract: A vehicle has a transmission shaft having an annular flange, a threaded end, a recess, and a cotter key inserted in the recess. A differential gearing device receives the transmission shaft. The differential gearing device has a bearing cover, a first one-way thrust bearing, a hollow bearing block, a second one-way thrust bearing, and a positioning disk. The hollow bearing block has a plate having four through holes. The first one-way thrust bearing and the second one-way thrust bearing are disposed in the hollow bearing block. Two screws fasten the bearing cover and the hollow bearing block together. A plurality of bolts fasten the plate and a driven element together. The transmission shaft passes through the bearing cover, the first one-way thrust bearing, the hollow bearing block, the second one-way thrust bearing, the positioning disk, and the driven element.