Patent Application
20180236294
This invention relates to stationary exercise machines.
The inventor is aware of the beneficial effects of vibrations during exercises. Vibrations in the range of 30 to 35 Hertz is believed to be most beneficial for recovery and injury prevention during and after exercise.
However, mechanically complex exercise machines such as bicycles, stationary bicycles, elliptical exercise machines such as, stepping machines, cross trainers and the like machines have not been able to successfully incorporate vibration technology due to the destructive effect of such vibrations on the bearings and pivot points of such machines.
It is an object of the invention to provide durable vibrating exercise machines.
According to the invention there is provided an exercise machine of the type which have pedals or foot plates through which a person can, in use, transfer kinetic energy to the machine, which machine comprises a means for vibrating the pedals or foot plates during exercise.
The exercise machine may be a bicycle, stationary exercise bicycle, an elliptical exercise type machine.
It is to be understood and appreciated that vibration is caused directly to the pedal or footplate places the vibration energy closest to the person doing exercises and lowers the vibrations transmitted to the machine.
The means for vibrating the pedals or foot plates during exercise may be a rotatable pedal or footplate mounting shaft of which the rotation axis and the pedal or footplate mounting point is offset to cause a wobble, vibration or oscillation of the pedal or footplate during exercise. Alternatively, the means for vibrating the pedals or foot plates during exercise may be an electrical vibration motor mounted to the footplate or pedal.
In the case of a bicycle or stationary exercise bicycle, the bicycle comprising:
a pair of stationary gears mounted on each side of the bicycle and with a circumference similar to the circumference of rotating pedal shafts of the bicycle;
a pair of crank arms rotatably mounted and connected at one end of each crank arm through a bottom bracket of the bicycle; and
a shaft rotatably mounted through a hole defined in the free end of each crank arm with one end extending inwards towards the bicycle and provided with a coaxial gear respectively engaging the stationary gears, with the other outwardly extending end provided with a socket for receiving a shaft of a bicycle pedal, which socket is offset from the axis of the rotatable shaft.
At least one bearing is provided between the rotatable shaft and the hole defined in the free end of each crank arm.
It is to be appreciated that as the pedals rotate, the rotatable shaft will rotate in relation to the stationary and coaxial gear ratio, which in turn will rotate the offset socket causing the socket and therefore the pedal shaft to move in a circle about the shaft. The circular movement of the offset socket and pedal shaft is experienced by the cyclist as a small wobble or oscillation and at speed a vibration directly transmitted to a person's feet. The amplitude of the wobble or vibration is equal to the offset.
The gear ratio of the large stationary gear and the small coaxial gear may preferably selected such that at a typical pedaling cadence range of 70 to 100 revolutions per minute (rpm) the pedal shaft will cycle at 30 to 35 Hertz (about 2000 rpm).
The offset and therefor the amplitude of the wobble or vibration may preferably be between 3 and 5 mm.
An advantage of the invention is that the vibration source is the pedals, i.e. the working contact point between a cyclist and the bicycle and most of the vibrational energy is transmitted directly to the cyclist to give maximum benefit to the cyclist while minimizing the vibration to the bicycle thereby minimizing the destructive effect of vibrations on the bicycles or exercise machine. A further advantage of the bicycle or stationary exercise bicycle embodiment of the invention is that the vibrations are mechanically generated and no electrical motors are required and the machine does not have to be connected to a power source. In addition, the interaction of the gears provide a source of resistance to pedaling, which lowers the required resistance to be provided by the usual resistance means of stationary exercise machines.
The invention is now described by way of example with reference to the accompanying drawings.
In the drawings:
Referring now to the drawings, the exercise machine in the form of a stationary exercise bicycle, in accordance with an example of the invention, is generally indicated by reference numeral 10.
The stationary exercise bicycle 10 comprises a means for vibrating the pedals during exercise. The exercise bicycle comprises a pair of stationary gears 12 mounted on each side of the bicycle. The stationary gears 12 are bolted by means of bolts 14 onto the frame (not shown) and have a circumference similar to the circumference of rotating pedal shafts 16 of the bicycle. A pair of crank arms 18 rotatably mounted and connected at one end 20 of each crank arm through a bottom bracket 22 of the bicycle 10. A shaft 24 is rotatably mounted through a hole 26 defined in the free end 28 of each crank arm 18 with one end 30 extending inwards towards the bicycle 10 and provided with a coaxial gear 32 respectively engaging the stationary gears 12, with the other outwardly extending end 34 provided with a socket 36 for receiving the 16 shaft of a bicycle pedal 38. The socket 36 is offset from the axis of the rotatable shaft 24. A pair of bearings (not shown) are provided between the rotatable shaft 24 and the hole 26 defined in the free end 28 of each crank arm 18.
The gear ratio of the large stationary gear 12 and the small coaxial gear 32 is selected such that at a typical pedaling cadence range of 90 revolutions per minute (rpm) the pedal shaft 16 will cycle or wobble at 33.2 Hertz. The offset and therefor the amplitude of the wobble or vibration is 4 mm.
It shall be understood that the examples are provided for illustrating the invention further and to assist a person skilled in the art with understanding the invention and are not meant to be construed as unduly limiting the reasonable scope of the invention.
