Abstract: An elliptical exercise machine includes a frame, an impedance unit, two linkage units and a stride-adjusting unit. The impedance unit includes a flywheel supported on the frame and two cranks connected to the flywheel. Each linkage unit includes a rocking element and a moving element. The rocking element includes an upper end and a lower end. The moving element includes a rear end and a front end connected to the lower end of the rocking element. The stride-adjusting unit includes a threaded rod and a carrier. The threaded rod is supported on the frame. The carrier is connected to upper end of the rocking element and formed with a screw hole for receiving the threaded rod so that the threaded rod can rotate to move the carrier and the upper end of the rocking element to adjust a stride of the elliptical exercise machine.

Abstract: A bicycle frame includes a seat tube, two chain stays and a down tube connected to the seat tube. A seat post is inserted into the seat tube and has a seat connected thereto. The chain stays is connected to a rear wheel and a head tube is connected to the down tube. A front fork is connected to the head tube. A tubular body is connected to the bicycle frame and the wall of the tubular body has a first slot. The seat tube is connected to a slide which is connected to the wall of the tubular body. A pin extends through the slide and the first slot. A first securing member and a second securing member are connected to two ends of the pin. The first and second securing members connect the wall of the tubular body to the slide.

Abstract: An ellipse exerciser includes a base, a rail frame having two rails, an ellipse unit having two pedals and two roller units, and an adjustment unit having a bottom part and a support frame. The roller units are moved along the rails of the rail frame. The bottom part has two slots and each slot has teeth. Two guide boards are pivotably connected to the two respective outsides of the bottom part. Each guide board is connected with a spring. The support frame has a rod and two ends of the rod are respectively engaged with the slots. The guide boards each have a stop portion to guide the rods. When the support frame is rotated to different angular positions relative to the bottom part, the rods are engaged with different teeth so as to adjust the inclination of the rails.

Abstract: An elliptical trainer includes a base, a post, a circular movement unit, two elliptical movement units and a stride-adjusting device. The post and the circular movement unit are supported on the base. Each elliptical movement unit includes a swing bar and a pedal carrier. The pedal carrier includes a front end pivotally connected to a lower end of the swing bar and a rear end pivotally connected to the circular movement unit. The stride-adjusting device includes a power unit and a lever set. The power unit is supported on the post. The lever set includes a middle portion pivotally connected to the post, an end pivotally connected to the power unit, and another end pivotally connected to the swing bars. The power unit is operable to pivot the lever set to move upper ends of the swing bars to change the strides of the elliptical movement units.

Abstract: An ellipse exerciser includes a base, a rail frame having two rails, an ellipse unit having two pedals and two roller units, and an adjustment unit having a bottom part and a support frame. The roller units are moved along the rails of the rail frame. The bottom part has two slots and each slot has teeth. Two guide boards are pivotably connected to the two respective outsides of the bottom part. Each guide board is connected with a spring. The support frame has a rod and two ends of the rod are respectively engaged with the slots. The guide boards each have a stop portion to guide the rods. When the support frame is rotated to different angular positions relative to the bottom part, the rods are engaged with different teeth so as to adjust the inclination of the rails.

Abstract: An adjustable weight assembly includes a weight device and an adjustment device. The weight device includes a rail, a movable member and multiple weights. The movable member is connected to a rod and receives a force applied by a force applying unit so as to move along the rail. The rod has multiple through holes and each weight has a latitude hole and a longitudinal hole. Each latitude hole has a pin extending therethrough and the rod extends through the longitudinal holes. The adjustable device includes a driving unit, a movable part and multiple pivotal members. The driving unit drives the movable part and each weight is pivotably connected to one of the pivotal members. When the movable part moves along the rail, the pivotal member is pivoted to decide the engagement between the pin and the through hole so that the user can adjust the number of the weights.

Abstract: A swing exerciser includes a base and a frame is pivotably connected to the base by a shaft. An exerciser such as a stationary bike is connected on the frame. A returning device includes a resilient bar which has a first end fixed to the base, and a second end fixed to the frame. The frame swings about the shaft and from a balanced position to an inclined position. The resilient bar is bent and the first and second ends of the resilient bar generate a returning force to pivot the frame from the inclined position to the balanced position.

Abstract: A bicycle frame includes a seat tube, two chain stays and a down tube connected to the seat tube. A seat post is inserted into the seat tube and has a seat connected thereto. The chain stays is connected to a rear wheel and a head tube is connected to the down tube. A front fork is connected to the head tube. A tubular body is connected to the bicycle frame and the wall of the tubular body has a first slot. The seat tube is connected to a slide which is connected to the wall of the tubular body. A pin extends through the slide and the first slot. A first securing member and a second securing member are connected to two ends of the pin. The first and second securing members connect the wall of the tubular body to the slide.

Abstract: An adjustable weight assembly includes a weight device and an adjustment device. The weight device includes a rail, a movable member and multiple weights. The movable member is connected to a rod and receives a force applied by a force applying unit so as to move along the rail. The rod has multiple through holes and each weight has a latitude hole and a longitudinal hole. Each latitude hole has a pin extending therethrough and the rod extends through the longitudinal holes. The adjustable device includes a driving unit, a movable part and multiple pivotal members. The driving unit drives the movable part and each weight is pivotably connected to one of the pivotal members. When the movable part moves along the rail, the pivotal member is pivoted to decide the engagement between the pin and the through hole so that the user can adjust the number of the weights.

Abstract: An electric wheel for electric vehicles includes a rim, connecting members, a hub motor, a battery, and a control device. The connecting members are connected to an inside of the rim and the hub motor is connected to the connecting members. The hub motor includes a shaft, a rotor and a stator. The shaft is located on a central axis of the rim and two ends of the shaft are fixed to a vehicle frame. The battery is located on the rim and the control device receives a wireless command signal and generating a control signal to control the battery to provide power to the hub motor, and to allow the hub motor to operate. The rim is equipped with the battery and the hub motor and directly connected to the vehicle frame without wires connected to the vehicle frame.

Abstract: A hub motor for electric vehicles and includes a rim, connecting members, a motor housing, a gear ring, a coil unit, a shaft, a tube, a magnet unit, a sun gear, a planet gear frame and multiple planet gears. The gear ring and the coil unit are fixed in the motor housing and two bearings are located between the shaft and the motor housing so that the motor housing is rotatable relative to the shaft. The tube has the magnet unit and the sun gear, and the planet gear frame is fixed to the shaft and the planet gears are connected to the planet gear frame. The planet gears are engaged with the gear ring and the sun gear.

Abstract: A treadmill includes a base, two rollers, a platform, a belt and two cushions. The base includes two longitudinal bars. The rollers are supported on the longitudinal bars. The platform is located between the rollers. The belt is wound on the rollers and the platform. Each of the cushions includes a cushioning strip supported on a related one of the longitudinal bars for cushioning the platform.

Abstract: A hub motor for driving a wheel of an electric vehicle and includes a cylindrical casing fixed to the wheel of an electric vehicle and a ring gear and a coil unit are fixed to the casing. A central unit includes co-axial two fixed axles and a shaft. Multiple bearings are located between the casing and the central unit so that the casing is rotatable relative to the central unit. The shaft has a magnet unit and a sun gear fixed thereto, a planet gear frame is connected to the fixed axle by a one-way bearing. Multiple planet gears are connected to the planet gear frame. The planet gears are engaged with the ring gear and the sun gear. The hub motor is simplified structure and easily assembled.

Abstract: A treadmill includes a frame, two rollers, a platform and a belt. The rollers are supported on the frame. The platform is supported on the frame and formed with a concave upper face. The belt is wound around the rollers and formed with a lower section and an upper section supported on the concave upper face of the concave platform.

Abstract: A treadmill includes a frame, front and rear roller, a belt and at least two upper guiding units. The front and rear rollers are supported on the frame. The belt is wound around the front and rear rollers. The upper guiding units are connected to the frame and used for contact with the upper section of the belt to alleviate suspension of the upper section of the belt above the frame.

Abstract: A treadmill includes a frame, two front wheels supported on the frame, two rear wheels supported on the frame, a caterpillar track wound on the front and rear wheels, and two rolling units each connected to a related one of two edges of the caterpillar track. Each of the front wheels includes a periphery and a plurality of recesses defined in the periphery. Each of the rolling units includes rollers each of which can be received in a related one of recesses.

Abstract: A treadmill includes a frame, at least two rollers, a belt and at least one guiding element. The rollers are supported on the frame. The belt is wound around the rollers. The guiding element is in contact with an upper face of an upper section of the belt to avoid suspension of the upper section of the belt above the frame.

Abstract: A stand assembly for motorcycles includes a stand unit, a motor, a power transmission mechanism and a switch set. The stand unit includes a first part pivotably connected to the bottom of the frame and a second part is retractably connected to the first part. The power transmission mechanism controls the motor to extend the second part relative to the first part to support the frame of the motorcycle or power bicycle. When the motorcycle or the power bicycle is ridden, the power transmission mechanism controls the motor to retract the second part relative to the first part.

Abstract: A treadmill includes a base, a supporting unit provided on the base, an upper controller located on the supporting unit, a lower controller located on the base and electrically connected to the upper controller, two rollers located on the base, a platform located between the rollers, a magnet attached to the platform, a belt made in the form of a loop wound around the rollers, a motor for driving one of the rollers; and a sensor attached to the base and electrically to both of the upper and lower controllers and for sensing movement of the magnet.