A planetary roller screw
A technology of planetary rollers and rollers, applied in the direction of transmission, belt/chain/gear, mechanical equipment, etc., can solve the problems of planetary roller-screw transmission ratio change, slip, inability to realize fixed transmission ratio transmission, etc. To achieve the effect of improving stability and accuracy, and improving accuracy
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[0038] The present invention will be further elaborated below in conjunction with embodiment.
[0039] In order to prevent the rollers and nuts of the differential planetary roller screw from sliding and improve the precision of the planetary motion of the rollers, the invention designs a novel planetary roller screw planet cage structure. The invention can fix the transmission ratio of the differential planetary roller screw, and improve the stability and precision of the planetary movement of the rollers.
[0040] Such as figure 1 As shown, the planetary roller screw specifically includes a screw rod 1, two ring gears 4, a nut 5, two bearing cages 3, two wire lock rings 7, n rollers 2 and positioning pins 6; , the screw rod 1 is axially placed horizontally; n rollers 2 are evenly distributed on the outer wall of the screw rod 1 along the circumferential direction; the rollers 2 are threaded with the screw rod 1; the bearing cage 3 is a ring structure; 2 bearing cages 3 are...
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