MOTION GUIDE DEVICE

摘要

Provided is a motion guide device capable of suppressing generation of a gap between a first seal member and a second seal member, which are fixed to a moving block, and preventing foreign matters from entering the moving block, to thereby achieve a smooth motion of the moving block with respect to a track rail. The motion guide device includes: a track shaft having a rolling surface; a moving member freely movable along the track shaft; the first seal member that comes into sliding contact with a surface of the track shaft so as to close a gap between the track shaft and the moving member; and the second seal member that is provided along the rolling surface of the track shaft and closes the gap between the track shaft and the moving member. The second seal member includes: a fixing substrate locked to the moving member; and a seal portion that is firmly fixed to the fixing substrate along the rolling surface of the track shaft and includes a seal lip portion that comes into sliding contact with the surface of the track shaft and an extended seal portion that comes into close contact with the first seal member while being compressed by the first seal member under the state in which the first seal member is fixed to the moving member.

主权项

1. A motion guide device, comprising:
a track shaft having a rolling surface for rolling elements formed along a longitudinal direction thereof; a moving member that is assembled to the track shaft through intermediation of a large number of the rolling elements and has an endless circulation path for the rolling elements, the moving member being freely movable along the track shaft; a pair of first seal members that is mounted to both end surfaces of the moving member in a moving direction thereof and comes into sliding contact with a surface of the track shaft so as to close a gap between the track shaft and the moving member; and a second seal member that is provided along the rolling surface of the track shaft and comes into sliding contact with the surface of the track shaft so as to close the gap between the track shaft and the moving member, wherein the second seal member comprises:
a fixing substrate locked to the moving member; anda seal portion that is firmly fixed to the fixing substrate along the rolling surface of the track shaft, the seal portion comprising a seal lip portion that comes into sliding contact with the surface of the track shaft, the seal portion having both longitudinal ends that come into close contact with the pair of first seal members under a state in which the pair of first seal members is fixed to the moving member, wherein the seal portion further comprises a pair of extended seal portions that protrudes in a longitudinal direction of the fixing substrate from both longitudinal ends of the fixing substrate, and wherein the pair of extended seal portions is compressed under the state in which the pair of first seal members is fixed to the moving member.