US 2022/0176196 A1 · MOTOR BRAKE DEVICE FOR EXERCISE APPARATUS

Abstract

A motor brake device of an exercise apparatus includes a motor, a brake device and a lifting device. The brake device has a rotating disc and a magnetic brake mechanism. The rotating disc is coaxially mounted on a motor shaft of the motor. The magnetic brake mechanism has at least one magnetic portion. The lifting device is configured to drive the magnetic brake mechanism to move between a first position where the magnetic portion is located close to the rotating disc and a second position where the magnetic portion is located away from the rotating disc. The second position is located higher than the first position. When there is no electric power supplied to the exercise apparatus, the magnetic brake mechanism can move downward to the first position to stop rotation of the motor shaft by gravity due to potential difference between the second position and the first position.

Claims20

Dependent claims

A motor brake device of an exercise apparatus, comprising:

a motor having a motor shaft;
a brake device having a rotating disc coaxially connected to the motor shaft and a magnetic brake mechanism, the rotating disc being an electrical conductor, the magnetic brake mechanism configured to apply a drag force against rotation of the conductive disc, the magnetic brake mechanism having at least one magnetic portion;
and
a lifting device configured to drive the magnetic brake mechanism to move between a first position where the magnetic portion is located close to the rotating disc and a second position where the magnetic portion is located away from the rotating disc;
wherein a height of a gravity center of the magnetic brake mechanism at the second position is higher than the height the gravity center of the magnetic brake mechanism at the first position.

2 more elements

An electric treadmill, comprising:

a treadmill frame;
an endless belt mounted around the treadmill frame;
a motor coupled to the endless belt for driving the endless belt to rotate;
a brake device having a conductive disc coaxially connected to a motor shaft of the motor and a magnetic brake mechanism configured to apply a drag force against rotation of the conductive disc, the magnetic brake mechanism having at least one magnetic portion;
and
a lifting device configured to drive the magnetic brake mechanism to move between a first position where the magnetic portion is located close to the rotating disc and a second position where the magnetic portion is located away from the rotating disc, wherein the second position is located higher than the first position;
wherein when the magnetic brake mechanism is located at the first position, a magnetic field created by the magnetic portion will pass through the rotating disc to generate the drag force against rotation of the conductive disc due to eddy currents induced in the conductive disc so as to stop rotation of the endless belt.

4 more elements

Dependencies are inferred from the claim text.

Motor brake device for exercise apparatus

Life of this patent

Motor brake device for exercise apparatus

Life of this patent

Abstract

Claims20