Solid lubricant and solid-lubrication rolling bearing

Patent metadata

Field	Value
Publication number	US-2016238076-A1
Application number	US-201415022228-A
Country	US
Kind code	A1
Filing date	Sep 16, 2014
Priority date	Sep 19, 2013
Publication date	Aug 18, 2016
Grant date	—

Abstract

A solid lubricant 11 is formed by molding and firing powder that includes amorphous and self-sintering carbon material powder 12, graphite powder 13, and a binder 14. The solid lubricant has high material strength and hardness, and also excellent impact resistance and wear resistance.

First claim

1 . A solid lubricant formed by molding and firing powder that includes amorphous and self-sintering carbon material powder, graphite powder, and a binder.

2 . The solid lubricant according to claim 1 , wherein
a combination ratio of the carbon material powder is larger than a combination ratio of the graphite powder in weight ratio.

3 . The solid lubricant according to claim 2 , wherein
the carbon material powder of 50 to 60 wt % and the graphite powder of 25 to 40 wt % are contained.

4 . The solid lubricant according to claim 1 , wherein
the carbon material powder and the graphite powder are granulated using the binder, and the granulated powder is molded and sintered.

5 . The solid lubricant according to claim 1 , wherein
at least one of W, Mo, and MoS 2 is added.

6 . The solid lubricant according to claim 1 , wherein
carbon fiber or carbon nanotube is added.

7 . The solid lubricant according to claim 1 , wherein
bending strength is set to 40 to 100 MPa, and Shore hardness (HSC) is set to 50 to 100.

8 . The solid lubricant according to claim 1 , wherein
specific wear rate is set to 1.0 to 2.5×10−7 mm 3 /(N·m).

9 . The solid lubricant according to claim 1 , wherein
density is set to 1.0 to 3.0 g/cm 3 .

10 . A solid-lubrication rolling bearing comprising:
an outer ring having an outer raceway face; an inner ring having an inner raceway face, a plurality of rolling elements disposed between the outer raceway face and the inner raceway face; and a separator disposed between the adjacent rolling elements, the separator being formed of the solid lubricant according to claim 1 , wherein relative movement of the adjacent rolling elements and the separator in a direction of separating apart in a circumferential direction is restricted by restricting members, and the restricting members are disposed at a plurality of places in the circumferential direction to allow relative movement between the adjacent restricting members.

11 . The solid-lubrication rolling bearing according to claim 10 , wherein
a pair of the restricting members are disposed on both axial sides of the rolling element and the separator, and the pair of restricting members, and the rolling element and the separator that are accommodated within the restricting members are regarded as one unit, and the units are disposed at a plurality of places in the circumferential direction to allow relative movement between the units.

12 . A solid-lubrication rolling bearing comprising:
an outer ring having an outer raceway face; an inner ring having an inner raceway face; a plurality of rolling elements disposed between the outer raceway face and the inner raceway face; and a separator disposed between the adjacent rolling elements to allow contact between the adjacent rolling elements, the separator being formed of the solid lubricant according to claim 1 .

13 . The solid-lubrication rolling bearing according to claim 12 , wherein
the separator has receiving faces that are disposed on both circumferential sides, and contact the respective rolling elements, and an opening opened to the both receiving faces, and the adjacent rolling elements are brought into contact with each other via the opening.

14 . The solid-lubrication rolling bearing according to claim 13 , wherein
the receiving faces of the separator each are shaped to make surface-contact with the rolling elements.

15 . The solid-lubrication rolling bearing according to claim 10 , used in a tenter clip of a film stretching machine.

Assignees

• AIGA Hisanori
• Gotou Takahiro
• Ito Yoshinori
• Satoji Fuminori
• Ntn Toyo Bearing Co Ltd

Inventors

• AIGA Hisanori
• Manabe Hiroki
• Gotou Takahiro
• Ito Yoshinori
• Satoji Fuminori

Classifications

• F16C33/422

  made from sheet metal · CPC title

• F16C33/3706

  with concave surfaces conforming to the shape of the rolling elements, e.g. the spacing bodies are in sliding contact with the rolling elements · CPC title

• C10M103/06

  Metal compounds · CPC title

• C10N2070/00

  Specific manufacturing methods for lubricant compositions · CPC title

• F16C33/44

  Selection of substances (F16C33/40, F16C33/41 take precedence) · CPC title