Patent ID: 8636416

Claim:
A bearing, comprising: a) a first friction board ( 3 ); b) a second friction board ( 1 ); c) an inner pedestal ( 6 ); d) a bearing sleeve ( 4 ) sleeving the inner pedestal ( 6 ); e) a pressure block ( 2 ); f) a pressure plate ( 7 ); and g) an elastic component ( 5 ); wherein the pressure block ( 2 ) is disposed on a part of the inner pedestal ( 6 ), and the second friction board ( 1 ) is disposed on a top of the pressure block ( 2 ); the pressure plate ( 7 ) is disposed on a part of the bearing sleeve ( 4 ), and the first friction board ( 3 ) is disposed on a top of the pressure plate ( 7 ); a friction coefficient μ k of the first friction board ( 3 ) and a friction coefficient μ z of the second friction board ( 1 ) meet the relation: μ k >μ z ; the elastic component ( 5 ) is disposed between the inner pedestal ( 6 ) and the bearing sleeve ( 4 ) for controlling a relative position of the inner pedestal ( 6 ) and the bearing sleeve ( 4 ); and a mechanical property of the elastic component ( 5 ) meets following requirements: a) in an empty loaded state, a level position of the first friction board ( 3 ) is higher than that of the second friction board ( 1 ) so that the first friction board bears the load of a car body; and b) in a heavy loaded state, the level position of the first friction board ( 3 ) is equal to that of the second friction board ( 1 ) so that the first friction board and the second friction board bear the load of the car body.