Ball bearings are usually divided into non-drinking stiffening stiffening bracket bearing two kinds. Only one non-stiffening rubber bearing, although under horizontal force horizontal deformation of rubber bearings to meet the needs of shearing, but bearing in vertical loads tend to produce vertical deformation. At this point, the ball bearings due to constraints is relatively small, and because the incompressibility of rubber, ball bearing deformation only sideways expansion, there will be a large rubber oil drum at a large convex pulling in around it stretch deformation, thereby generating stress aging. Such ball bearing on our roads and bridges is not recommended. In order to withstand large vertical loads can also meet the needs of horizontal displacement, the bridges are generally used stiffened laminated rubber bearings, ball bearings stiffening stiffening material can be steel, glass fiber, cotton, nylon and other BLKGZ type seismic grid ball bearings, single use of bridge steel stiffening material is not recommended to use other materials, rubber since stiffening plate for vertical loads acting under LKQZ-II seismic ball bearing, rubber sheet embedded between steel will limit the expansion of the convex side rubber drum, vertical deformation is reduced accordingly, thus greatly improving the vertical stiffness of rubber bearings. At this time, the ball bearing vertical deformation of the total deformation will be the sum of each thin rubber sheet. Experimental study on mechanical properties of bearing ball of roads and bridges, mainly in order to develop and revise highway bridge design specifications and provide a reliable basis for the transportation industry standard two conducted several trials research work in the country has undergone the following three The main experimental research stage. Pilot phase ball bearings and started to explore the early 1980s, ball bearings appear nearly ten years and used in China, and has been widely used in roads and bridges, but in the bridge design specifications related to ball design calculations specified content type bearing rough, but also our own rubber bearing no product standards, for bridges and culverts norms for revision in 1975, from November 1980 to March 1982 by the Shanghai Municipal Engineering Design Institute Highway Planning and Design Institute (formerly the Ministry of Transportation Planning and Design Institute) commission chaired the four categories, 51 kinds of different specifications of the 155, the smallest form factor of 1.75 earthquake ball bearings, up to 15.87, flat area for 100mm × 140mm KQGZ ball bearing type earthquake, the largest experimental study of small-scale 150mm × 200mm rectangular ball bearing. By testing the mechanical properties of ball bearing have a better understanding for the selected design parameters amendments provide tangible basis. Seismic ball bearings _ finished product quality certification factory _BLKGZ seismic grid type ball bearing is provided by Hao-engineering rubber. Hengshui Hao Tong Engineering Rubber Co., Ltd. (www.htgcxj.com) in the grid bearings, bridge expansion joints, water stop, bridge bearings, rubber bearings, ball bearings and other steel industry has high visibility, integrity management both, quality of service, welcome to inquire or consult our "business alliance customer service" it!