Sintered metal bearing, shaft member for a sliding bearing unit and sliding bearing unit provided with said shaft member

摘要

A sintered metal sliding bearing (1) has a sliding surface (3) for movement relative to a shaft (2). The sintered metal bearing (1) comprises: a sintered metal bearing body (5) consisting of a metal mixture that differs from the metal mixture of the shaft (2) and has a large number of inner pores (4); and a resin film (6) formed in certain areas of a surface of the sintered metal bearing body (5) and forming the sliding surface (3). The resin film (6) is designed in such a way that surface openings (7), which are connected to the large number of internal pores (4), are kept open and resin film parts (10) are dependent on the relative sliding movement relative to the shaft (2). detach from the sintered metal bearing body 5 to adhere to a surface of the shaft (2). In addition, a shaft member (13) is used for use in a slide bearing unit; by inserting it into a sintered metal sliding bearing (sintered metal bearing 12) which predominantly has a copper mixture (19), or the copper mixture (19) and an iron mixture (20), the shaft member (13) having a sliding surface 14 for movement relative to a sintered metal bearing (12) includes. The shaft member (13) comprises: a shaft body (17) made of metal; and a resin film (18) formed of metal in certain areas of a surface of the shaft body (17) and forming the sliding surface (14). The resin film (18) consists of a resin with better adhesive properties to the shaft body (17) made of metal than to the copper mixture (19), and the resin film (18) only partially detaches depending on the sliding movement relative to the sintered metal bearing (12) from the shaft body (17) made of metal.