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US 11,326,673 B2Granted
Increased durability linear actuator
AssigneeiFIT Inc.
InventorDale Alan Buchanan
Life of this patent
Estimating the term…
Abstract
A linear actuator includes a motor, a shaft, and a casing. The shaft has a longitudinal axis, and the shaft is moveable along the longitudinal axis by the motor. The casing supports the motor and the shaft with a tapered roller bearing positioned between at least a portion of the shaft and a portion of the casing.
Claims19
A linear actuator, the actuator comprising:
- a motor;
- a shaft having a longitudinal axis, the shaft moveable along the longitudinal axis by the motor;
- a casing supporting the motor and the shaft;
- and
- a tapered roller bearing positioned between the shaft and the casing, wherein the tapered roller bearing is in contact with the shaft, wherein the tapered roller bearing includes:
- an inner race;
- an outer race;
- and
- a plurality of rollers positioned between the inner race and the outer race, wherein the plurality of rollers are positioned with a bearing angle relative to the longitudinal axis of the shaft, the bearing angle being between 5° and 45° to receive an axial force and a radial force applied to the shaft.
6 more elements
An exercise system, the system comprising:
- a base;
- a frame moveably connected to the base;
- a linear actuator positioned between at least a portion of the base and at least a portion of the frame to apply a force to move the frame relative to the base, the linear actuator including:
- a motor;
- a shaft having a longitudinal axis, the shaft moveable along the longitudinal axis by the motor;
- a casing supporting the motor and the shaft;
- and
- a tapered roller bearing positioned between a shoulder of the shaft and the casing, wherein the tapered roller bearing includes:
- an inner race;
- an outer race;
- and
- a plurality of rollers positioned between the inner race and the outer race, wherein the tapered roller includes a bearing angle of between 5° and 45° to receive an axial force and a radial force applied to the shaft.
9 more elements
A method of supporting a shaft of a linear actuator, the method comprising:
- receiving a radial force with a shaft of the linear actuator;
- transmitting the radial force to an acme screw;
- and
- applying a torque with the acme screw to a tapered roller bearing, the tapered roller bearing including an inner race, an outer race, and a plurality of rollers positioned between the inner race and the outer race with a bearing angle between 5° and 45°, wherein the tapered roller bearing receives at least a portion of the radial force and an axial force based on a contact with the shaft.
1 more element
Dependencies are inferred from the claim text.