US 6,302,826 B1Granted

Direct driving apparatus for an electric treadmill

OwnerYing-Che Leeinventor

Life of this patent

Estimating the term…

Loading patent…

Abstract

The present invention relates to a direct driving apparatus for an electric treadmill which includes a fixing axle disposed at front end of a frame of a treadmill; a roller driving a running belt and being constructed hollow inside thereof, two ends of the roller being fitted with an U-shaped turning wheel with an outward opening respectively, a plurality of permanent magnet sets being disposed at the inner rim of the turning wheel; a stator core having a coil thereon, the coil being fastened on a fixing socket with a receiving hole and being coupled with the permanent magnet to form a brushless motor; and a current control used for controlling the speed of the turning wheel and the roller. When the current control supplies electricity to the coil, it is a direct driving motorized device while it is a non-motorized treadmill at power failure.

Claims4

Dependent claims

A direct drive system for an electric treadmill comprising:

(a) a frame;
(b) a fixing axle extending between opposed portions of said frame;
(c) a pair of turning wheels coaxially coupled in angularly displaceable manner to said fixing axle, each said turning wheel having a substantially U-shaped sectional contour defining a recess and an inner rim wall surface extending thereabout,
(d) a plurality of permanent magnets coupled to said inner rim wall surface for each said turning wheel,
(e) a pair of fixing sockets coupled to said fixing axle to extend respectively into said recesses of said turning wheels;
(f) a pair of stator cores coupled respectively to said fixing sockets, each said stator core being radially spaced from said permanent magnets of one said turning wheel, each said stator core having coil windings formed thereon;
(g) a driving roller extending axially between said turning wheels for engaging one end portion of an endless running belt;
and,
(h) a current control unit coupled to each of said stator cores, said current control unit being operable to adjustably energize said stator cores for brushless motor coupling with said permanent magnets of said turning wheels responsive to AC power and user inputs;
whereby said driving roller is selectively rotated about said fixing axle to drive the looped displacement of the endless running belt.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/531,512Filed 21 Mar 2000
Granted: 16 Oct 2001
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

H02K 7/14
Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical…:…
A63B 22/02
Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements: with…
H02K 7/083
Structural association with bearings: radially supporting the rotary shaft at both ends of the rotor
H02K 16/00
Machines with more than one rotor or stator