Double-structure bush and bearing assembly comprising same

A double-structure bush made of a polymeric composite, the double-structure bush constructed and arranged to be placed between a boss and a pin unit inserted thereinto, and the double-structure bush comprising:

• a slide layer configured to receive a pin unit, in which the inner circumferential surface of the slide layer is in contact with the pin unit to support rotation of the pin unit;
• and
• a load support layer integrally stacked on the outer circumferential surface of the slide layer, configured to be received in a boss, in which the load support layer is in contact with the inner circumferential surface of the boss to support radial load of the pin unit,
• wherein the slide layer is made of a first polymeric composite comprising (a) a first polymeric matrix, (b) a self-lubricative material, and (c) a first fiber base, and the mixing ratio of the first polymeric matrix, self-lubricative material, and first fiber base is 20 to 22:20 to 55:25 to 30 by weight, and
• the load support layer is made of a second polymeric composite comprising (a) a second polymeric matrix and (b) a second fiber base, and the mixing ratio of the second polymeric matrix and the second fiber base is 18 to 21:79 to 82 by weight.