# US 2022/0186779 A1 · Linear motion guide unit

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- Number: US 2022/0186779 A1
- Document ID: US20220186779A1
- Status: Published application
- Kind: A1
- Application number: 17/550,199
- Filed: 2021-12-14
- Published: 2022-06-16
- Earliest claimed: 2020-12-14
- Assignees: Nippon Thompson Co., Ltd.
- Applicants: Nippon Thompson Co., Ltd.
- Inventors: Masashi MATSUI; Masatoshi KONDO; Yusuke YAMAGUCHI; Junji MATSUI
- Web page: https://patentgrep.com/patent/US20220186779A1

## CPC

- F16C 29/0602: {Details of the bearing body or carriage or parts thereof, e.g. methods for manufacturing or assembly}
- F16C 29/065: {with rollers}
- F16C 29/06: in which the rolling bodies circulate partly without carrying load
- F16C 29/0607: {of parts or members for retaining the rolling elements, i.e. members to prevent the rolling elements from falling out of the bearing body or carriage}
- F16C 29/0609: {of the ends of the bearing body or carriage where the rolling elements change direction, e.g. end caps}
- F16C 33/104: {in a porous body, e.g. oil impregnated sintered sleeve}
- F16C 33/106: {Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid}
- F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS

## Abstract

A linear motion guide unit includes a rail, a slider slidable relative to the rail, and rolling elements rollable in a rolling groove formed with the rail and the slider. The slider has a lubricating oil supply device provided at least at one end face thereof. The lubricating oil supply device includes a lubricating member that retains lubricating oil and abuts against a raceway surface of the rail to supply the lubricating oil to the rail, a housing having front, rear, and bottom surfaces covering front, rear, and bottom surfaces of the lubricating member, with an upper surface of the housing being left open, and a cover that covers at least an upper surface of the lubricating member. The housing is fixed to the slider with a first fixing member. The cover is fixed to the housing with a second fixing member, without being fixed with the first fixing member.

## Claims

### Claim 1

A linear motion guide unit comprising a rail, a slider slidable relative to the rail, and roiling elements rollable in a rolling groove formed with the rail and the slider,
the slider having a lubricating oil supply device provided at least at one end face thereof,
the lubricating oil supply device including
a lubricating member that retains lubricating oil and abuts against a raceway surface of the rail to supply the lubricating oil to the rail,
a housing having a front surface, a rear surface, and a bottom surface covering a front surface, a rear surface, and a bottom surface of the lubricating member, with an upper surface of the housing being left open, and
a cover that covers at least an upper surface of the lubricating member,
the housing being fixed to the slider with a first fixing member,
the cover being fixed to the housing with a second fixing member, without being fixed with the first fixing member.

### Claim 2 (depends on 1)

The linear motion guide unit according to claim 1, wherein the cover includes a top portion that covers the upper surface of the lubricating member, and two side portions that extend from both ends of the top portion and cover side surfaces of the lubricating member.

### Claim 3 (depends on 1)

The linear motion guide unit according to claim 1, wherein the housing further has side surface portions that extend in a side surface direction from outer ends of the front surface and the rear surface, respectively, the side surface portion extending from the front surface and the side surface portion extending from the rear surface having a spacing therebetween.

### Claim 4 (depends on 3)

The linear motion guide unit according to claim 3, wherein
the lubricating member is composed of two members on right and left sides with respect to a longitudinal direction of the rail, and
the lubricating member has a thickness that is equal to or smaller than a width of the spacing between the side surface portion extending from the front surface and the side surface portion extending from the rear surface of the housing.

### Claim 5 (depends on 1)

The linear motion guide unit according to claim 1, wherein the lubricating member has a protruding portion that protrudes outwardly at a position on the side surface corresponding to the raceway surface of the rail.

### Claim 6 (depends on 1)

The linear motion guide unit according to claim 1, wherein the housing has, at a portion of the bottom surface opposing the rail, a tapered portion that protrudes toward the rail.

### Claim 7 (depends on 2)

The linear motion guide unit according to claim 2, wherein the cover has tip ends of the side portions formed in a tapered shape.