초록 ▼

A cam follower includes a shaft member which is cantilevered at one end and a slide bearing fitted onto the outer periphery of the other end of the shaft member. The slide bearing is composed of a cylindrical matrix made of an Fe-based sintered metal material having an Fe content of 90 wt % or more

A cam follower includes a shaft member which is cantilevered at one end and a slide bearing fitted onto the outer periphery of the other end of the shaft member. The slide bearing is composed of a cylindrical matrix made of an Fe-based sintered metal material having an Fe content of 90 wt % or more and a slide layer formed from the inner peripheral surface to the both end faces of the matrix. The slide layer is made of a slide material composition having a base material such as polyethylene resin blended with a lubricant such as silicone oil and a globular porous silica impregnated with this lubricant.

대표청구항 ▼

What is claimed is: 1. A slide bearing comprising: a matrix made of a metal; and a slide layer formed on a predetermined surface of the matrix and having a bearing surface which slides with a shaft member, wherein the matrix has a contact surface which performs one of rolling and sliding over a mat

What is claimed is: 1. A slide bearing comprising: a matrix made of a metal; and a slide layer formed on a predetermined surface of the matrix and having a bearing surface which slides with a shaft member, wherein the matrix has a contact surface which performs one of rolling and sliding over a mating member and the matrix is made of an Fe-based sintered metal material having an Fe content of 90 weight % or more, the surface of the matrix on which the slider layer is formed has a surface opening ratio of 20 to 50%, and the slide layer is formed by insert molding the slide material composition including a resin as a base material on the surface of the matrix. 2. The slide bearing according to claim 1, wherein a product of linear expansion coefficient of slide material composition forming slide layer and thickness of slide layer is 0.15 or less. 3. The slide bearing according to claim 2, wherein the contact surface is formed on the outer peripheral surface of the matrix; the slide layer is formed from the inner peripheral surface to the both end surfaces of the matrix; the bearing surface of the slide layer formed on the inner peripheral surface of the matrix is a radial bearing face for supporting a radial load from the shaft member; and the bearing surfaces of the slide layer formed on both end faces of the matrix are thrust bearing faces for supporting a thrust load from the shaft member. 4. The slide bearing according to claims 1, wherein the slide material composition forming the slide layer comprises a lubricant. 5. The slide bearing according to claim 4, wherein the lubricant is silicone oil. 6. The slide bearing according to claim 4, wherein the slide material composition forming the slide layer further comprises a porous silica impregnated with a lubricant. 7. The slide bearing according to claim 6, wherein the porous silica is a globular porous silica having interconnected pores. 8. The slide bearing according to claim 7, wherein the globular porous silica has an average particle diameter of 0.5 to 100 μm. 9. The slide bearing according to claim 1, wherein a base material of the slide material composition forming the slide layer is polyethylene resin. 10. The slide bearing according to claim 1, wherein the contact surface is formed on the outer peripheral surface of the matrix; the slide layer is formed from the inner peripheral surface to the both end surfaces of the matrix; the bearing surface of the slide layer formed on the inner peripheral surface of the matrix is a radial bearing face for supporting a radial load from the shaft member; and the bearing surfaces of the slide layer formed on both end faces of the matrix are thrust bearing faces for supporting a thrust load from the shaft member. 11. A cam follower comprising: a shaft member cantilevered at one end; and a slide bearing fitted onto the shaft member, wherein the slide bearing comprises a matrix made of a metal; and a slide layer formed on a predetermined surface of the matrix and having a bearing surface which slides with a shaft member, wherein the matrix has a contact surface which performs one of rolling and sliding over a mating member and the matrix is made of an Fe-based sintered metal material having an Fe content of 90 weight % or more, the surface of the matrix on which the slider layer is formed has a surface opening ratio of 20 to 50%, and the slide layer is formed by insert molding the slide material composition including a resin as a base material on the surface of the matrix. 12. The cam follower according to claim 11, wherein a product of linear expansion coefficient of slide material composition forming slide layer and thickness of slide layer is 0.15 or less. 13. The cam follower according to claim 12, wherein the contact surface is formed on the outer peripheral surface of the matrix; the slide layer is formed from the inner peripheral surface to the both end surfaces of the matrix; the bearing surface of the slide layer formed on the inner peripheral surface of the matrix is a radial bearing face for supporting a radial load from the shaft member; and the bearing surfaces of the slide layer formed on both end faces of the matrix are thrust bearing faces for supporting a thrust load from the shaft member. 14. The cam follower according to claim 11, wherein the slide material composition forming the slide layer comprises a lubricant. 15. The cam follower according to claim 14, wherein the lubricant is silicone oil. 16. The cam follower according to claim 14, wherein the slide material composition forming the slide layer further comprises a porous silica impregnated with a lubricant. 17. The cam follower according to claim 16, wherein the porous silica is a globular porous silica having interconnected pores. 18. The cam follower according to claim 17, wherein the globular porous silica has an average particle diameter of 0.5 to 100 μm. 19. The cam follower according to claim 11, wherein a base material of the slide material composition forming the slide layer is polyethylene resin. 20. The cam follower according to claim 11, wherein the contact surface is formed on the outer peripheral surface of the matrix; the slide layer is formed from the inner peripheral surface to the both end surfaces of the matrix; the bearing surface of the slide layer formed on the inner peripheral surface of the matrix is a radial bearing face for supporting a radial load from the shaft member; and the bearing surfaces of the slide layer formed on both end faces of the matrix are thrust bearing faces for supporting a thrust load from the shaft member.