TY - JOUR
T1 - Kinematic analysis of an inverted planetary roller screw considering roller pitch circle mismatch
AU - Ma, Shangjun
AU - Liu, Geng
AU - Tong, Ruiting
AU - Zhang, Wenjie
PY - 2014/6/10
Y1 - 2014/6/10
N2 - Taking an inverted planetary roller screw as the research object, the kinematic models were developed to investigate axial displacement and slip velocity of the roller relative to the screw, which was caused by a pitch circle mismatch between the roller thread and the roller gear. First, the calculation formulas of the angle of slip, axial displacement and slip velocity of the roller relative to the screw were presented, and the effects of roller displacement on the overall lead and slip velocity of the mechanism were analyzed. Then, an inverted planetary roller screw was selected as an example, and the pitch circle mismatch values due to contact deformation were derived. Furthermore, the axial displacement and slip velocity of the roller relative to the screw were calculated by using the formulas respectively. The results show that the roller displacement does not affect the lead of the overall system, the slip must occur at the nut-roller interface, and slip velocity is decreased by decreasing the pitch mismatch values at the screw-roller interface effectively.
AB - Taking an inverted planetary roller screw as the research object, the kinematic models were developed to investigate axial displacement and slip velocity of the roller relative to the screw, which was caused by a pitch circle mismatch between the roller thread and the roller gear. First, the calculation formulas of the angle of slip, axial displacement and slip velocity of the roller relative to the screw were presented, and the effects of roller displacement on the overall lead and slip velocity of the mechanism were analyzed. Then, an inverted planetary roller screw was selected as an example, and the pitch circle mismatch values due to contact deformation were derived. Furthermore, the axial displacement and slip velocity of the roller relative to the screw were calculated by using the formulas respectively. The results show that the roller displacement does not affect the lead of the overall system, the slip must occur at the nut-roller interface, and slip velocity is decreased by decreasing the pitch mismatch values at the screw-roller interface effectively.
KW - Axial displacement
KW - Inverted planetary roller screw
KW - Pitch circle mismatch
KW - Slip velocity
UR - https://www.scopus.com/pages/publications/84903574927
U2 - 10.3969/j.issn.1004-132X.2014.11.001
DO - 10.3969/j.issn.1004-132X.2014.11.001
M3 - 文章
AN - SCOPUS:84903574927
SN - 1004-132X
SP - 1421
EP - 1426
JO - Zhongguo Jixie Gongcheng/China Mechanical Engineering
JF - Zhongguo Jixie Gongcheng/China Mechanical Engineering
IS - 11
ER -