Thk Co., Ltd.

Hiroki Irikawa

Shinji Aoki

Shodai Aoyama

Provided is a motion guide device, which includes: a track rail; rolling elements; a moving block, which has an endless circulation path; and a holding belt having pockets, wherein the holding belt has a pair of end portions opposed to each other through intermediation of a free rolling element in the endless circulation path, and wherein a condition of (X&#x2212;Y)&#xd7;Z&#x3e;(B+C)&#x2212;A&#x3e;0 is satisfied, where: A represents a path length of the endless circulation path; B represents a total length of the holding belt; C represents a diameter of the free rolling element; X represents a diameter of each of the pockets; Y represents a diameter of each of the rolling elements; and Z represents the number of the rolling elements arrayed in the holding belt.

Motion guide device

Provided is a rolling guide device which is capable of preventing uneven wear of a holding belt by alleviating a tensile force that acts on the holding belt when the holding belt circulates in an endless circulation path together with rolling elements. The endless circulation path has a guide groove configured to guide movement of the holding belt in the endless circulation path. A condition of t&#x3c;&#x3b4; is satisfied, where: trepresents a maximum clearance between both end portions of the holding belt which are opposed to each other in the endless circulation path; &#x3b4; is expressed by 2c represents an interval between the holding belt in a load path and the holding belt in a return path; A represents a depth to an arc top point of an outer peripheral surface of the guide groove in a direction change path; B represents a depth to an arc top point of an inner peripheral surface of the guide groove in the direction change path; 'd' represents a thickness of the holding belt; and a=(A&#x2212;d/2) and b=(B+d/2) are satisfied.

Rolling guide device

Provided is a motion guide device including a track rail in which a rolling body rolling groove is formed and a movable block which is mounted on the track rail via a plurality of rolling bodies. The movable block includes a movable block body which has a loaded rolling body rolling groove forming a loaded rolling body rolling passage in cooperation with the rolling body rolling groove and has a non-loaded rolling body rolling passage, return members in which inner peripheral-side direction change grooves connecting the loaded rolling body rolling passage and the non-loaded rolling body rolling passage are formed, and end plates. The end plate has a rolling body scooping arm protruding in a direction of a connection surface with the movable block body and a rolling body scooping groove continuous with the outer peripheral-side direction change groove is formed in the rolling body scooping arm.

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Tokyo, Japan

Hiroki Irikawa