Sliding bearing fixed bearing member refers both to prevent vertical movement and generate support end move around, but also to prevent rotation of the bearing components produced. Fixed support above the bridge is not sliding, while bearing activities above the level of the bridge is sliding. Sliding bearing effect is resistant to thermal expansion and contraction due to ambient temperature changes, the structure produced. Sliding bearings that can move along a straight direction bearing, compared with ordinary fixed bearing, is more than a can slide along a straight direction. Characterized by a force balance when the seat sliding direction only along a direction perpendicular to the moving direction of the carriage which the parameter? 1, the vertical pressure is 2, 3 the vertical tension, shear level 4, the corner 5, the amount of displacement. If you have to consider the impact or preload, damping bearings can consider setting damping component displacement stiffness trip into ordinary laminated rubber bearing laminated rubber bearings and Teflon skateboard rubber bearing two species, in the amount of displacement is not the case, can be used in all common plate bearing, bearing shear deformation realized by the beam deflection. When the temperature of the beam displacement is large, requires the use of an ordinary plate bearing + PTFE slide mount, then, can be regarded as an ordinary plate bearing fixed bearing, PTFE slide bearings can be considered as bearing activities. Generally across the fixed bearing, sliding bearings at both ends of the fixed end bearing support reactions associated with each moment, there are, but there is no fixed hinge support (which can be rotated). For bearing constraint problem, you come to understand what is freedom. For two-dimensional, usually a point two degrees of freedom, that is, can be divided into horizontal and vertical direction, or X direction and Y direction. On a rigid member has three degrees of freedom, is the level of freedom vertical freedom and rotational degrees of freedom of a fixed hinge bearing, but limit two degrees of freedom, namely, horizontal and vertical, can not restrict the rotation. Supports: to support the weight of the container or apparatus, and it is fixed to a predetermined position of the supporting member. Also bear when operating vibration and seismic loads. Hinge bearing a fixed position with the desired object is the connection for articulated support. Hinge bearing is a component in order to facilitate the analysis of mechanical stress situations simplified model introduced, it greatly simplifies the introduction, analytical mechanics at the point of interconnection between components. Sliding bearing category: (1) a movable hinge support: can not move vertically, you can rotate, you can move horizontally. (2) fixed hinge support: you can rotate, horizontal and vertical direction can not be moved. (3) there is a fixed hinged, hinged activities, such as hinged ball. Classification by bearing deformation possibilities: 1) fixed bearing; 2) single bearing activities; 3) Supports multiple activities 

palabras clave: Sliding bearings, fixed hinge bearing, one-way fixed hinge support,