Patent ID: 9625016
Date: 2017-04-18
CPC Classifications: F16C,F16H,H02K,Y10T

Claim:
1. A step actuator comprising: a housing structure including a first housing and a second housing; a stator installed in the housing structure, wherein the stator includes a first bobbin, a second bobbin, a first yoke having a first tooth, and a second yoke having a second tooth installed between the first housing and the second housing; a rotor positioned radially inward from the stator, the rotor rotating and protruding from one side of the housing structure; a bearing installed at one side of the second housing; a bearing cover coupled with one side of the housing structure, wherein the bearing cover supports the bearing; a screw member coupled with the rotor; and a mounting member coupled to the bearing cover, wherein the first housing includes a third tooth protruding toward the second housing so as to be disposed between the first bobbin and a magnet by passing through a slit of the first bobbin, wherein the second housing includes a fourth tooth protruding toward the first housing so as to be disposed between the second bobbin and the magnet; wherein the bearing cover includes a coupling rim having a ring shape and coupled to one side of the housing structure, a coupling pipe extending from the coupling rim, and a locking rim protruding radially inward from an end of the coupling pipe to make contact with an outer race of the bearing; and wherein the bearing cover comprises a coupling section protruding radially inward from the coupling rim to make contact with the outer race of the bearing.