US2021310546A1PendingUtilityA1

Speed change device

71
Assignee: GENESIS ADVANCED TECH INCPriority: May 25, 2012Filed: Jun 18, 2021Published: Oct 7, 2021
Est. expiryMay 25, 2032(~5.9 yrs left)· nominal 20-yr term from priority
Inventors:James Brent Klassen
F16H 13/08F16C 33/526F16C 33/585Y02T10/86F16C 19/505F16C 33/523F16C 19/55F16C 33/36F16C 33/363F16C 19/38F16H 1/28F16C 19/28
71
PatentIndex Score
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Claims

Abstract

A speed change device comprising an inner race having an outer surface, an outer race having an inner surface, and set of orbital rollers including inner rollers in rolling contact with the outer surface of the inner race and outer rollers in rolling contact with the inner surface of the outer race.

Claims

exact text as granted — not AI-modified
That which is claimed: 
     
         1 . A speed change device comprising:
 an inner race having an outer surface;   an outer race having an inner surface;   a set of orbital rollers including inner rollers in rolling contact with the outer surface of the inner race and outer rollers in rolling contact with the inner surface of the outer race, wherein at least one of: (a) each outer roller is formed of a pair of axially aligned roller sections, or (b) each inner roller is formed of a pair of axially aligned roller sections;   each and every inner roller being in rolling contact with two outer rollers and wherein the inner rollers are longer than the outer rollers and the inner rollers are connected to be driven by an input ring coaxial with the inner race and the outer race; and   each and every outer roller being in rolling contact with two inner rollers.   
     
     
         2 . The speed change device of  claim 1 , in which the input ring has an inward facing surface and the inward facing surface is in geared contact with the inner roller. 
     
     
         3 . The speed change device of  claim 1 , in which each of the inner race and outer race are centered on an axis, and, for each pair of a first inner roller that contacts a first outer roller, where a traction angle o is defined as the angle between a first line extending outward from the axis through a center of the first inner roller and a second line extending from the contact point of the first outer roller with the outer race and a contact point of the first inner roller with the inner race, and the first inner roller contacts the inner race with a first coefficient of friction cf1and the first outer roller contacts the outer race with a second coefficient of friction cf2, cf1>tan(o) and cf2>tan(o). 
     
     
         4 . The speed change device of  claim 1 , in which each inner roller is formed of two or more axially aligned roller sections and each outer roller is in contact with each roller section of each inner roller that the outer roller contacts. 
     
     
         5 . The speed change device of  claim 1 , integrated with a preliminary speed change stage, and wherein the preliminary speed change device has an integrated preliminary speed change stage using the self-energizing present speed change system such that camming of the rollers in the first stage increases the contact force of these rollers on the outer race of the first stage such that the outer race of the first stage can expand to transmit this increased radial force to the input traction surfaces on the rollers of the second stage. 
     
     
         6 . The speed change device of  claim 1 , further comprising a ring concentric with the inner race and outer race and the ring being connected to the orbital rollers to drive or be driven by the orbital rollers. 
     
     
         7 . The speed change device of  claim 6 , in which the ring is connected to the inner rollers to drive the inner rollers. 
     
     
         8 . The speed change device of  claim 6 , in which the ring is connected to the outer rollers to drive the outer rollers. 
     
     
         9 . The speed change device of  claim 1 , in which the outer rollers have a different diameter contact with the inner surface of the outer race, than the diameter of contact of the outer rollers with the inner rollers. 
     
     
         10 . The speed change device of  claim 1 , in which the outer rollers have a larger diameter primary torque transmitting contact with the inner surface of the outer race, than the diameter in primary torque transmitting contact with the inner rollers. 
     
     
         11 . The speed change device of  claim 1 , in which the rollers of the orbital rollers have conical faces that contact conical faces of other rollers of the orbital rollers when the rollers are not axially centered. 
     
     
         12 . The speed change device of  claim 1 , further comprising integrated rotational sensors. 
     
     
         13 . A speed change device comprising:
 an inner race having an outer surface;   an outer race having an inner surface;   a set of orbital rollers including inner rollers in rolling contact with the outer surface of the inner race and outer rollers in rolling contact with the inner surface of the outer race, wherein at least one of: (a) each outer roller is formed of a pair of axially aligned roller sections, or (b) each inner roller is formed of a pair of axially aligned roller sections;   each and every outer roller being in rolling contact with two inner rollers and wherein the outer rollers are longer than the inner rollers and the outer rollers are connected to be driven by an input ring coaxial with the inner race and the outer race; and   each and every inner roller being in rolling contact with two outer rollers.   
     
     
         14 . The speed change device of  claim 13 , in which the input ring has an outward facing surface and the outward facing surface is in geared contact with the outer rollers. 
     
     
         15 . The speed change device of  claim 13 , in which each of the inner race and outer race are centered on an axis, and, for each pair of a first inner roller that contacts a first outer roller, where a traction angle o is defined as the angle between a first line extending outward from the axis through a center of the first inner roller and a second line extending from the contact point of the first outer roller with the outer race and a contact point of the first inner roller with the inner race, and the first inner roller contacts the inner race with a first coefficient of friction cf1 and the first outer roller contacts the outer race with a second coefficient of friction cf2, cf1>tan(o) and cf2>tan(o). 
     
     
         16 . The speed change device of  claim 13 , further comprising integrated rotational sensors. 
     
     
         17 . The speed change device of  claim 13 , in which the rollers of the orbital rollers have conical faces that contact conical faces of other rollers of the orbital rollers when the rollers are not axially centered. 
     
     
         18 . The speed change device of  claim 13 , in which the rollers of the orbital rollers have conical faces that contact conical faces of other rollers of the orbital rollers when the rollers are not axially centered. 
     
     
         19 . The speed change device of  claim 13 , integrated with a preliminary speed change stage, and wherein the preliminary speed change device has an integrated preliminary speed change stage using the self-energizing present speed change system such that camming of the rollers in the first stage increases the contact force of these rollers on the outer race of the first stage such that the outer race of the first stage can expand to transmit this increased radial force to the input traction surfaces on the rollers of the second stage. 
     
     
         20 . The speed change device of  claim 13 , in which the outer rollers have a different diameter contact with the inner surface of the outer race, than the diameter of contact of the outer rollers with the inner rollers.

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