Rubber power vibration absorber

Abstract

The invention provides a rubber power vibration absorber and relates to a power vibration absorber. The rubber power vibration absorber comprises a mounting bracket, a mass inertia block, an upper pressing plate, vibration absorbing rubber and a vibration bracket, wherein the mass inertia block is positioned in the mounting bracket; the top end of the vibration bracket exposes out of the top of the mounting bracket; the bottom end of the vibration bracket penetrates into the top of the mounting bracket and is fixedly connected in the mass inertia block; the upper pressing plate is positioned above the top end of the vibration bracket; the upper pressing plate, the mounting bracket and the vibration bracket are connected into a whole through the vibration absorbing rubber in a thermally-vulcanized manner; the top of the mounting bracket and the upper pressing plate are connected with each other on the periphery of the vibration absorbing rubber through adjusting a fastening part so as to freely adjust the compression or tensile deformation quantity of the vibration absorbing rubber in the vertical direction. According to the rubber power vibration absorber, the vibration noise can be reduced, and not only can the free stiffness adjustment be performed after rubber vulcanization forming and in the using and debugging processes, but also the falling-off or the flying-out by hitting when the mass inertia block is in use can be prevented. The rubber power vibration absorber has the advantages of being long in service life, high in safety performance, high in qualified rate and easy to popularize and apply.

Description

technical field [0001] The invention relates to a dynamic shock absorber, in particular to a rubber dynamic shock absorber with adjustable stiffness and position-limiting structure suitable for the fields of automobiles, engineering machinery, machinery and the like. Background technique [0002] Vibration is harmful and beneficial, but in most cases, harmful vibration will cause people to feel uncomfortable, and can cause premature damage to products and structures, reduce service life, and even endanger people's health and personal safety. Therefore, harmful vibration must be reduced or eliminated as much as possible. In engineering, there are many ways to reduce or eliminate vibration, such as eliminating or weakening vibration source, isolating or attenuating vibration transmission, dynamic vibration absorption, increasing damping, adjusting structure, etc. Among them, dynamic vibration absorption belongs to passive vibration reduction, which is also a more economical an...

AI Technical Summary

Problems solved by technology

[0005] (f: natural frequency, k: vibration-absorbing rubber stiffness, m : the mass of the mass inertia block), the natural frequency is related to the mass and stiffness. When the quality of the mass inertia block is fixed due to the constraints of the assembly space, service life and the total mass of the vibrating body, the stiffness of the vibration-absorbing rubber can be controlled to achieve The purpose of controlling the natural frequency of the dynamic vibration absorber, according to the principle of dynamic vibration absorption, when the natural frequency of the vibration absorber is the same or close to the excitation frequency, the vibration absorber can achieve the best function of reducing vibration and noise, which requires the stiffness of the vibration-absorbing rubber to be controlled Only in a small range can it play the most effective role. However, in the manufacturing process of the existing vibration absorber, due to the impact of the deterioration of the rubber product manufacturing process such as rubber mixing and vulcanization, the stiffness of the vibration-absorbing rubber body produced Unable to meet the requirements 100%, the pass rate is low, and unqualified products cannot be reworked and repaired, resulting in a large waste

[0006]In recent years, some relatively new adjustable stiffness rubber dynamic shock absorber structures have appeared in China, such as the utility model patent 201420283485. The structure of the dynamic vibration absorber for the purpose of rigidity, such as the utility model patent 201320129345.8, proposes a dynamic vibration absorber structure for the purpose of adjusting the spring coefficient by adjusting the lateral deformation of the rubber, but the structure of the dynamic vibration absorber with such an adjustable structure does not consider Appropriate limit settings lead to actual use, especially in occasions with large vibration and relatively low vibration frequency such as automobiles and construction machinery, the mass inertia block is prone to over-limit deformation and tearing of the vibration-absorbing rubber under the long-term inertial action. Under extreme conditions, the mass inertial block comes out unconstrained and damages the mounting bracket and surrounding components, or even falls to the ground or is knocked out by rotating components and injures operators, pedestrians, other equipment or vehicles, posing a safety hazard. Limiting the further excessive application and promotion of this similar structure product

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