Hao-engineering rubber | elastic damping slide ball bearing | ball bearing activities provided by Hao-engineering rubber. We are Hengshui HaoTong Engineering Rubber Co., Ltd. (www.htgcxj.com) located at: Hebei Hengshui specializes in: grid bearings, bridge expansion joints, water stop, bridge bearings, rubber bearings, spherical steel bearing the rubber bearing elastic deformation and has good cushioning properties corridor activity ball bearing, so there is a certain degree of seismic rubber bearing performance and better shock absorption cushioning effect, but the design of the research on the seismic bearing a late start , it can be said that has just begun, particularly affecting shear properties and stiffness caused by error of the rubber by pulling state of durability, fatigue resistance, durability of rubber and steel plate bonding activity ball bearing, rubber protective layer of weathering and other aspects are subject to further study these problems in the future can do a lot more work. Currently, depending on the type of classification, rubber bearings can be summarized as laminated rubber bearing, shock absorption and isolation bearing (LRB) and ribbon rubber bearings, bearing the form described by this chapter respectively. Laminated rubber bearings is not a new product, and it is the child in the 1930s started to develop abroad, has been 70 years of history, we can say that a relatively mature product grid activities ball bearing, in Abroad, Mr. E.GKimrnich rubber engineering pundits different form factor, different rubber hardness specimens were thousands of times of stress - strain experiments, the first application of laminated rubber bearings on the outskirts of the French Sainfpenis station bridge, to 1960s foreign 1970s started to develop spherical bearings, and soon in the curved bridge applications. Germany prestressed concrete bridge built in recent decades the use of bearing condition survey was carried out using a bridge abutment features will bring greater influence elastic damping slide ball bearing, therefore, properly handle bearing structure bridge to accommodate the dynamic performance can be produced by a variety of loads is extremely important. The role of the earthquake, in the vertical direction of the force constant load, increasing the horizontal direction caused by the earthquake and the vertical direction of the shock force. As the bearing function, requiring support vertical force, horizontal displacement of the supporting horizontal force or functional structures built after the completion of the settlement if the foundation compaction due to changes in ground subsidence, causing the lower pick Oh stocks, horizontal displacement and rotation and other structures divided into a plurality of functions and structures made of a combination of multiple functions, then we must fully take into account the mutual interference can not occur, the formation of structural weaknesses on.