A perforated spherical hinge type rubber elastic element

Abstract

The invention provides a perforated spherical hinge type rubber elastic element comprising a core shaft, a rubber piece externally sleeving the core shaft, and a jacket sleeving the rubber piece externally. With the center of circle as the axis, the rubber piece is symmetrically provided with two hole structures which run through the axial direction of the rubber piece. Each hole structure comprises an outer arc surface close to the jacket side, an inner arc surface close to the core shaft side, and two side surfaces connecting the outer arc surface and the inner arc surface, wherein the inner arc surface has a radian in the same direction as the jacket, and the included angle between the normal of the inner arc surface and the side surfaces is an obtuse angle. With the hole structures of the rubber piece, the variable stiffness can be increased gently, the rubber piece is effectively prevented from bending and deforming at the hole structure positions and the generation of rubber cracks is prevented.

Description

technical field [0001] The invention relates to the technical field of spherical hinge rubber elastic components, in particular to an open-hole type spherical hinge rubber elastic component. Background technique [0002] During the loading and running process of the ball joint products, according to the different installation positions and design functions, they can realize the functions of vibration reduction, traction and flexible connection. In order to ensure the dynamic performance and comfort of vehicle operation, the stiffness of the product is required to be small when it is unloaded; however, in order to ensure the reliability of vehicle operation, the product is required to have greater stiffness at maximum load (starting and braking) so as to be timely Therefore, the spherical joint, especially the traction spherical joint, needs to have a certain degree of variable stiffness. [0003] In order to meet the variable stiffness requirements of ball hinge products, i...

AI Technical Summary

Problems solved by technology

However, the design of the opening structure of the above-mentioned spherical hinge products is not ideal. When the product is radially loaded, the transition arcs on both sides of the opening structure are prone to bending deformation under radial compression, which makes the stress concentration there obvious. , eventually leading to rubber cracking at the transition arc, such as figure 2 shown; and the variable stiffness design of the existing spherical hinge products has a sudden change in stiffness, which is not conducive to the vibration damping and flexible connection of the rubber product, because: with the increase of the load, the inner and outer arc rubber surfaces at the opening are approaching but not No stiffness is provided during the contact process. At this time, the stiffness of the product is small and basically unchanged; when the load increases to a certain level, the inner and outer arc rubber profiles suddenly come into contact with a certain amount of deformation. Due to the contact area Sudden increase, resulting in a sudden increase in stiffness to provide greater stiffness, there is a sudden change in stiffness in the area near the deformation of the inner and outer arc surface contact, such as Figure 4 As shown in curve 2, it can be seen that the opening structure of the above-mentioned spherical hinge products has deficiencies

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