Motion guide device and actuator

• US 10,718,378 B2
• Filed: 08/06/2019
• Issued: 07/21/2020
• Est. Priority Date: 11/30/2015
• Status: Active Grant

• Current Assignee: THK Company Limited
• Original Assignee: THK Company Limited
• Inventors: Homma, Kazuto, Yoshida, Akimasa, Yatsushiro, Daisuke, Iguchi, Takuya
• Primary Examiner(s): Pilkington, James
• Application Number:
  US16/533,070
• Publication Number:
  US 20190360570A1
• Time in Patent Office: 350 Days
• CPC Class Codes: F16C 2208/82 Composites, i.e. fibre reinforced thermosetting resins
• CPC Class Codes: F16C 2226/40 with adhesive
• CPC Class Codes: F16C 2226/54 with rivets in general F16B19/00
• CPC Class Codes: F16C 2226/60 with threaded parts, e.g. bolt and nut connections in general F16B23/00 - F16B43/00
• CPC Class Codes: F16C 29/005 Guide rails or tracks for a linear bearing, i.e. adapted for movement of a carriage or bearing body there along
• CPC Class Codes: F16C 29/06 in which the rolling bodies circulate partly without carrying load
• CPC Class Codes: F16C 29/0602 Details of the bearing body or carriage or parts thereof, e.g. methods for manufacturing or assembly
• CPC Class Codes: F16C 29/0609 of the ends of the bearing body or carriage where the rolling elements change direction, e.g. end caps
• CPC Class Codes: F16C 29/063 with a bearing body, e.g. a carriage or part thereof, provided between the legs of a U-shaped guide rail or track
• CPC Class Codes: F16C 33/62 Selection of substances
• CPC Class Codes: F16C 35/00 Rigid support of bearing units; Housings, e.g. caps, covers F16C23/00 takes precedence
• CPC Class Codes: F16H 2025/2031 Actuator casings
• CPC Class Codes: F16H 25/22 with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
• CPC Class Codes: F16H 25/2228 the device for circulation forming a part of the screw member
• CPC Class Codes: F16H 25/2238 using ball spacers, i.e. spacers separating the balls, e.g. by forming a chain supporting the balls

Abstract

A track member or a movable member constituting a motion guide device includes a rolling part formed of a metal material contacting with a plurality of rolling bodies and forming a rolling body rolling surface a, a mounting part formed of a metal material having a mounting hole for mounting an external member, and a track body or a movable body formed of FRP jointed with the rolling part and the mounting part and forming the track member or the movable member, and the mounting part and the track body or the movable body have joint holes, opened in a direction orthogonal to a lamination direction of FRP reinforced fiber sheets S forming the track body or the movable body at a time of the joint, and can be jointed using jointing means. An external member can be securely mounted to the motion guide device formed of FRP.

Claims

1. A motion guide device comprising:

a track member; and

a movable member mounted on the track member so as to freely move via a plurality of rolling bodies, wherein the track member comprises;

a rolling part formed of a metal material contacting with the plurality of rolling bodies and forming a rolling body rolling surface;

a mounting part having formed therein a mounting hole for mounting an external member; and

a track body formed of FRP (fiber reinforced plastics) jointed with the rolling part and the mounting part and forming the track member,

the track body has a bolt mounting hole opened in a direction orthogonal to a lamination direction of FRP reinforced fiber sheets forming the track body, and is jointed with the mounting part using a jointing means placed in the bolt mounting hole,

the track member is formed as a member having a substantially U-shaped section,

a plurality of the bolt mounting holes are formed on a bottom surface side of the track member having the substantially U-shaped section at intervals in a longitudinal direction of the track member, and a stepped portion where a diameter of a hole is changed is formed at a center portion of the bolt mounting holes,

the mounting part is a metal collar that has a flange portion on its upper side and that has formed therein the mounting hole for mounting the external member, and

a screw groove is formed in an inner circumferential surface of the mounting hole formed in the metal collar.

2. An actuator incorporating a motion guide device according to claim 1.

3. A motion guide device comprising:

a track member; and

a movable member mounted on the track member so as to freely move via a plurality of rolling bodies, wherein the track member comprises;

a rolling part formed of a metal material contacting with the plurality of rolling bodies and forming a rolling body rolling surface;

a mounting part having formed therein a mounting hole for mounting an external member; and

a track body formed of FRP (fiber reinforced plastics) jointed with the rolling part and the mounting part and forming the track member,

the track body has a bolt mounting hole opened in a direction orthogonal to a lamination direction of FRP reinforced fiber sheets forming the track body, and is jointed with the mounting part using a jointing means placed in the bolt mounting hole,

the track member is formed as a member having a substantially U-shaped section,

a plurality of the bolt mounting holes are formed on a bottom surface side of the track member having the substantially U-shaped section at intervals in a longitudinal direction of the track member,

a groove-shaped portion as a stepped portion is formed on a bottom surface side at a forming place of the bolt mounting hole, and

a reinforcing mounting part as the mounting part is fitted into the groove-shaped portion.

4. The motion guide device according to claim 3, wherein one first joint hole is formed in a center portion and second joint holes are formed on both sides of the first joint hole, in the reinforcing mounting part,

when the reinforcing mounting part is fitted into the groove-shaped portion, the bolt mounting hole formed in the track body and the first joint hole overlap each other,

bolt holes are formed in front and rear of a forming place of the bolt mounting hole formed in the track body, and when the reinforcing mounting part is fitted into the groove-shaped portion, the second joint holes and the bolt holes overlap each other,

the reinforcing mounting part is fixed to the groove-shaped portion of the track body by fastening bolts to the second joint holes using the bolt holes formed in the front and the rear of the forming place of the bolt mounting hole formed in the track body, and

the track member is fixed to an object to be fixed by inserting a bolt to the first joint hole and the bolt mounting hole.

5. An actuator incorporating a motion guide device according to claim 4.

6. An actuator incorporating a motion guide device according to claim 3.