Curvilinear motion rolling guide unit

Patent metadata

Field	Value
Publication number	US-9897141-B2
Application number	US-201615350370-A
Country	US
Kind code	B2
Filing date	Nov 14, 2016
Priority date	Nov 11, 2015
Publication date	Feb 20, 2018
Grant date	Feb 20, 2018

Abstract

A curvilinear motion rolling guide unit is such that pipe members adapted to form return passages are disposed respectively at undercuts of wings of an arcuate casing, thereby reducing working costs. A slider has a casing and end caps fixed to respective opposite ends of the casing. Pipe members adapted to form return passages are disposed at the respective undercuts formed on the wings of the casing. Cover members have longitudinally extending grooves, respectively, for covering the pipe members. Fitting grooves formed at opposite ends of the grooves of the cover members are fitted to direction changing passages provided in the respective end caps, whereby the cover members are fixed to the end caps.

First claim

What is claimed is:

1. A curvilinear motion rolling guide unit comprising:
a raceway rail having first raceway grooves formed in arcuate inner and outer side surfaces having predetermined radiuses of curvature, respectively;
an arcuate slider having second raceway grooves formed in opposition to the respective first raceway grooves and moving on the raceway rail in a relative manner while straddling the raceway rail; and
a plurality of rolling elements rolling in infinite circulation passages each being composed of a raceway passage formed between the first raceway groove and the second raceway groove, a return passage provided in the slider and extending along the raceway passage, and direction changing passages provided in the slider and establishing communication between the raceway passage and the return passage,
wherein the slider has an arcuate casing which has an upper section and wings extending from inner and outer sides of the upper section along the inner and outer side surfaces of the raceway rail and having the respective second raceway grooves formed therein, end caps fixed to respective opposite end surfaces of the casing and having the respective direction changing passages formed therein, and arcuate cover members having respective grooves which extend along longitudinal directions of the wings of the casing and into which respective arcuate pipe members adapted to form the respective return passages are fitted,
the cover members are fixed to the casing and/or the end caps, and
wherein the end caps in contact with the end surfaces of the casing have connection pipe portions extending from the direction changing passages and protruding toward the casing, and communicating with the return passages of the pipe members, and opposite end portions of the cover members are fitted to the respective connection pipe portions, whereby the cover members are fixed to the end caps.

2. The curvilinear motion rolling guide unit according to claim 1 , wherein the opposite end surfaces of the pipe members abut end surfaces of the connection pipe portions of the end caps, respectively, whereby the direction changing passages and the return passages communicate with each other.

3. The curvilinear motion rolling guide unit according to claim 2 , wherein fitting grooves formed at opposite ends of the grooves of the cover members are fitted to the respective connection pipe portions formed in wings of the end caps, whereby the cover members are fixed to the casing in position.

4. A curvilinear motion rolling guide unit comprising:
a raceway rail having first raceway grooves formed in arcuate inner and outer side surfaces having predetermined radiuses of curvature, respectively;
an arcuate slider having second raceway grooves formed in opposition to the respective first raceway grooves and moving on the raceway rail in a relative manner while straddling the raceway rail; and
a plurality of rolling elements rolling in infinite circulation passages each being composed of a raceway passage formed between the first raceway groove and the second raceway groove, a return passage provided in the slider and extending along the raceway passage, and direction changing passages provided in the slider and establishing communication between the raceway passage and the return passage,
wherein the slider has an arcuate casing which has an upper section and wings extending from inner and outer sides of the upper section along the inner and outer side surfaces of the raceway rail and having the respective second raceway grooves formed therein, end caps fixed to respective opposite end surfaces of the casing and having the respective direction changing passages formed therein, and arcuate cover members having respective grooves which extend along longitudinal directions of the wings of the casing and into which respective arcuate pipe members adapted to form the respective return passages are fitted,
the cover members are fixed to the casing and/or the end caps, and
wherein at least the outer cover member disposed at the wing of the casing has first hook portions provided respectively at its opposite end portions and extending toward the casing, and the first hook portions are fitted respectively into and engaged with first hook fixation recesses formed in the opposite end surfaces of the casing, whereby the cover member is fixed to the casing in position.

5. A curvilinear motion rolling guide unit comprising,
a raceway rail having first raceway grooves formed in arcuate inner and outer side surfaces having predetermined radiuses of curvature, respectively;
an arcuate slider having second raceway grooves formed in opposition to the respective first raceway grooves and moving on the raceway rail in a relative manner while straddling the raceway rail; and
a plurality of rolling elements rolling in infinite circulation passages each being composed of a raceway passage formed between the first raceway groove and the second raceway groove, a return passage provided in the slider and extending along the raceway passage, and direction changing passages provided in the slider and establishing communication between the raceway passage and the return passage,
wherein the slider has an arcuate casing which has an upper section and wings extending from inner and outer sides of the upper section along the inner and outer side surfaces of the raceway rail and having the respective second raceway grooves formed therein, end caps fixed to respective opposite end surfaces of the casing and having the respective direction changing passages formed therein, and arcuate cover members having respective grooves which extend along longitudinal directions of the wings of the casing and into which respective arcuate pipe members adapted to form the respective return passages are fitted,
the cover members are fixed to the casing and/or the end caps, and
wherein at least the outer cover member disposed at the wing of the casing has, at its opposite end portions, hook portions extending toward the casing and provided at its inclined surface corresponding to an inclined surface of the undercut of the casing and located above the pipe member, and the hook portions are fitted respectively into and engaged with a second hook fixation recesses formed in the opposite end surfaces of the casing, whereby the cover member is fixed to the casing in position.

6. A curvilinear motion rolling guide unit comprising:
a raceway rail having first raceway grooves formed in arcuate inner and outer side surfaces having predetermined radiuses of curvature, respectively;
an arcuate slider having second raceway grooves formed in opposition to the respective first raceway grooves and moving on the raceway rail in a relative manner while straddling the raceway rail; and
a plurality of rolling elements rolling in infinite circulation passages each being composed of a raceway passage formed between the first raceway groove and the second raceway groove, a return passage provided in the slider and extending along the raceway passage, and direction changing passages provided in the slider and establishing communication between the raceway passage and the return passage,
wherein the slider has an arcuate casing which has an upper section and wings extending from inner and outer sides of the upper section along the inner and outer side surfaces of the raceway rail and having the respective second raceway grooves formed therein, end caps fixed to respective opposite end surfaces of the casing and having the respective direction changing passages formed therein, and arcuate cover members having respective grooves which extend along longitudinal directions of the wings of the casing and into which respective arcuate pipe members adapted to form the respective return passages

Assignees

• Nippon Thompson Co Ltd
• Nippon Thompson Co Ltd

Inventors

• Kuwabara Hideki
• Yoshida Masaharu
• Tsuboi Takaaki
• Nakano Katsuaki
• Mine Akitomo

Classifications

• F16C29/0657

  with two rows of balls, one on each side of the rail · CPC title

• F16C2226/74

  with snap-fit, e.g. by clips · CPC title

• F16C29/0654

  with balls · CPC title

• F16C29/0609

  of the ends of the bearing body or carriage where the rolling elements change direction, e.g. end caps · CPC title

• F16C43/04

  Assembling rolling-contact bearings · CPC title