LINEAR ENCODER

• US 20160011017A1
• Filed: 07/10/2015
• Published: 01/14/2016
• Est. Priority Date: 07/10/2014
• Status: Active Grant

• Current Assignee: Okuma Corporation
• Original Assignee: Okuma Corporation
• Inventors: HAYASHI, Yasukazu, FUKUI, Noriyuki
• Granted Patent: US 9,689,716 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01D 5/34753 Carriages; Driving or coupling means

Abstract

To provide a linear encoder including a scale unit and a slider that slides along the scale unit, wherein the slider includes a slider enclosure including a slider holding unit, a detection head holding unit mounted inside a scale enclosure of the scale unit, and a pillar extending between the outside and inside of the scale enclosure to connect these two holding units, and a part of the pillar closer to the detection head holding unit and a part of the detection head holding unit closer to the pillar are bored by a thickness larger than a thickness of the pillar.

Claims

1. A linear encoder having a scale unit and a slider that slides along the scale unit, wherein

the slider has a slider enclosure including a slider holding unit, a detection head holding unit mounted inside a scale enclosure of the scale unit, and a pillar extending between outside and inside of the scale enclosure to connect these two holding units, and

a part of the pillar closer to the detection head holding unit and a part of the detection head holding unit closer to the pillar are bored by a thickness larger than a thickness of the pillar.

2. The linear encoder according to claim 1, wherein boring of the pillar is applied to a part closer to the detection head holding unit than a position where a seal secured on the scale enclosure contacts the pillar when the pillar is assembled to the scale unit.

3. The linear encoder according to claim 1, wherein the slider enclosure is formed so as to include a through hole integrally molded between the part bored of the pillar and the slider holding unit.

4. The linear encoder according to claim 1, wherein the slider enclosure is given post processing for forming a through hole between the part bored of the pillar and the slider holding unit by means of milling machining.

5. The linear encoder according to claim 2, wherein the slider enclosure is formed so as to include a through hole integrally molded between the part bored of the pillar and the slider holding unit.

6. The linear encoder according to claim 2, wherein the slider enclosure is given post processing for forming a through hole between the part bored of the pillar and the slider holding unit by means of milling machining.