US 11,655,884 B2
Linear motion device and component thereof
Szu-Ying Lee, New Taipei (TW)
Filed by Szu-Ying Lee, New Taipei (TW)
Filed on Jun. 29, 2022, as Appl. No. 17/809,637.
Claims priority of application No. 202121829881.X (CN), filed on Aug. 6, 2021.
Prior Publication US 2023/0042824 A1, Feb. 9, 2023
Int. Cl. F16H 25/22 (2006.01)
CPC F16H 25/2214 (2013.01) 20 Claims
OG exemplary drawing
 
1. A linear motion device, comprising:
a screw comprising a spiral outer groove on an outer peripheral surface of the screw;
a nut comprising a tube portion and a spiral inner groove, wherein the tube portion is fitted over the screw, the spiral inner groove is on an inner peripheral surface of the tube portion, and the spiral inner groove and the spiral outer groove correspond to each other to form a ball groove;
an end cover fixed to the nut, wherein the end cover comprises a first surface, a second surface, a first through hole portion, at least one engaging groove, and a circulation member; the first surface and the second surface are opposite to each other, and the second surface faces the nut; the first through hole portion is defined through the end cover from the first surface to the second surface and corresponds to the tube portion; the at least one engaging groove is arranged on at the first surface, and the at least one engaging groove has a tapered portion and a receiving portion; the tapered portion corresponds to the first surface, and the receiving portion is connected to the tapered portion; the circulation member axially extends from a peripheral portion of the first through hole portion on the second surface and passes through the tube portion of the nut, the circulation member has a circulation groove, and the circulation groove is in communication with the ball groove; and
a scrape plate assembled with the end cover, wherein the scrape plate comprises a third surface, a fourth surface, a second through hole portion, at least one engaging member, and a scrape piece; the third surface and the fourth surface are opposite to each other, and the fourth surface faces the first surface of the end cover; the second through hole portion is defined through the scrape plate from the third surface to the fourth surface and corresponds to the tube portion; the at least one engaging member is arranged on the fourth surface and correspondingly assembled with the at least one engaging groove; the at least engaging member has a neck portion and a protruding portion, the neck portion is connected to the fourth surface, and the protruding portion is connected to the neck portion; the scrape piece is on a peripheral portion of the second through hole portion and correspondingly assembled with the spiral outer groove;
wherein the neck portion is received in the tapered portion and the protruding portion is received in the receiving portion.