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Title: Variable loading roller

Abstract

An automatic loading roller for transmitting torque in traction drive devices in manipulator arm joints includes a two-part camming device having a first cam portion rotatable in place on a shaft by an input torque and a second cam portion coaxially rotatable and translatable having a rotating drive surface thereon for engaging the driven surface of an output roller with a resultant force proportional to the torque transmitted. Complementary helical grooves on the respective cam portions interconnected through ball bearings interacting with those grooves effect the rotation and translation of the second cam portion in response to rotation of the first.

Inventors:
 [1]
  1. (Oliver Springs, TN)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
OSTI Identifier:
867016
Patent Number(s):
US 4841792
Assignee:
United States of America as represented by United States (Washington, DC) ORNL
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
variable; loading; roller; automatic; transmitting; torque; traction; drive; devices; manipulator; arm; joints; two-part; camming; device; portion; rotatable; shaft; input; coaxially; translatable; rotating; surface; thereon; engaging; driven; output; resultant; force; proportional; transmitted; complementary; helical; grooves; respective; portions; interconnected; ball; bearings; interacting; effect; rotation; translation; response; manipulator arm; traction drive; surface thereon; variable load; ball bearing; drive devices; loading roller; /476/74/

Citation Formats

Williams, Daniel M. Variable loading roller. United States: N. p., 1989. Web.
Williams, Daniel M. Variable loading roller. United States.
Williams, Daniel M. 1989. "Variable loading roller". United States. doi:. https://www.osti.gov/servlets/purl/867016.
@article{osti_867016,
title = {Variable loading roller},
author = {Williams, Daniel M.},
abstractNote = {An automatic loading roller for transmitting torque in traction drive devices in manipulator arm joints includes a two-part camming device having a first cam portion rotatable in place on a shaft by an input torque and a second cam portion coaxially rotatable and translatable having a rotating drive surface thereon for engaging the driven surface of an output roller with a resultant force proportional to the torque transmitted. Complementary helical grooves on the respective cam portions interconnected through ball bearings interacting with those grooves effect the rotation and translation of the second cam portion in response to rotation of the first.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1989,
month = 1
}

Patent:

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  • This patent describes an automatic loading roller for transmitting torque in traction drive devices in manipulator arm joints includes a two-part camming device having a first cam portion rotatable in place on a shaft by an input torque and a second cam portion coaxially rotatable and translatable having a rotating drive surface thereon for engaging the driven surface of an output roller with a resultant force proportional to the torque transmitted. Complementary helical grooves on the respective cam portions interconnected through ball bearings interacting with those grooves effect the rotation and translation of the second cam portion in response tomore » rotation of the first.« less
  • An automatic loading roller for transmitting torque in traction drive devices in manipulator arm joints includes a two-part camming device having a first cam portion rotatable in place on a shaft by an input torque and a second cam portion coaxially rotatable and translatable having a rotating drive surface thereon for engaging the driven surface of an output roller with a resultant force proportional to the torque transmitted. Complementary helical grooves in the respective cam portions interconnected through ball bearings interacting with those grooves effect the rotation and translation of the second cam portion in response to rotation of themore » first. 14 figs.« less
  • The period from September 1977 to September 1978 covered laboratory rolling contact rig tests to evaluate typical low hardness dragline track materials. The results of this work are covered by DOE/ET/9121-1 Final Report, Volume I. The period from September 1978 to July 1980 covered field measurements of dragline roller circle loadings. The results of this work are covered by DOE/ET/9121-2 Final Report, Volume II. During May 1979, a field test group visited the Beltona Mines in Warrior, Alabama, for the purpose of instrumenting and testing dragline roller circle loading. This testing was done both before and after the introduction ofmore » elastomeric padding between the upper track and rotating frame. The data collected indicates installation of an elastomeric pad between the rotation frame and the upper track reduced the strain in the upper track. The primary reason for these load and strain reductions was added flexibility provided by the elastomeric pad coupled with redistribution of local loads. Installation of the elastomeric pad also reduced the peak roller loads resulting from hard spots due to dragline construction. More field data is necessary to fully appreciate the positive and negative effects of elastomeric pad on roller track loading. This information can be obtained through more thorough testing and instrumentation program.« less
  • This patent describes an overrunning roller brake assembly for a planetary gear unit in an automatic transmission for automobiles, the gear unit having a ring gear, a carrier and a sun gear, the carrier having planet pinions thereon engaging the sun and ring gears; a brake for anchoring a reaction member of the gear unit, at least one other member of the gear unit being adapted to receive driving torque; the brake comprising an annular inner brake race surrounding a fixed part of the transmission, an annular outer brake race connected to the reaction member and surrounding the inner race,more » the outer race comprising an extrusion with an outer brake drum surface adapted to be engaged by a reaction friction brake band; overrunning brake rollers between the races, a pair of support rings between the races on either side of the rollers; the support rings having a C-shaped cross section whereby the inner and outer surfaces thereof provide a bearing support for the races; retainer rings enclosed within the support rings, the retainer rings having a radial thickness approximately equal to the radial inside dimension of the C-shaped cross section of the support rings whereby radial loads are transmitted between the races through the retainer rings and support rings.« less
  • A heat transfer roller embodying a heat pipe is disclosed. The heat pipe is mounted on a shaft, and the shaft is adapted for rotation on its axis.