Vibration isolation pad

Abstract

The invention discloses a vibration isolation pad which is used for an automobile. The vibration isolation pad comprises a base, a connecting shaft, a pre-tightening nut, an upper elastic block, a lower elastic block and a cover plate, wherein the upper elastic block is positioned in an upper concave cavity on the base; the lower elastic block is positioned in a lower concave cavity of the base; the cover plate is positioned above the upper elastic block; the connecting shaft sequentially penetrates through the lower elastic block, a connecting plate of the base, the upper elastic block and a through hole of the cover plate and is connected with the pre-tightening nut; the lower end of the connecting shaft is provided with a first boss matched with the lower concave cavity of the base; an annular step surface of the first concave boss is in contact with and supports the lower elastic block; and the upper elastic block and the lower elastic block are internally provided with empty cavities. The vibration isolation pad provided by the invention not only plays an effect of simultaneously isolating vibration up and down, but also automatically regulates the rigidity and damping, adapts to different working conditions of automobile running, plays support and spacing effects on a power assembly, isolates the vibration caused by the power assembly to an automobile frame effectively, reduces the vibration noise in an automobile compartment, and improves the comfortableness.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a vibration isolation pad for an engine or a power assembly. Background technique [0002] With the development of China's automobile industry in recent years, automobiles have become one of the main means of transportation for people to travel. The engine is the power source of the vehicle, but also the main source of vibration. If the vibration generated by the engine is not well controlled, it will cause body vibration and affect the ride comfort of the vehicle. In recent years, as the number of vehicles, especially passenger cars, has greatly increased in the market, modern vehicle design puts forward higher requirements for the vibration isolation between the engine and the vehicle body. [0003] When the vehicle powertrain mount is matched, the vibration isolation pad is used to support the powertrain and at the same time isolate the transmission of the powertrain vib...

AI Technical Summary

Problems solved by technology

At present, the stiffness and damping of vibration isolation pads commonly used in the market are fixed and cannot be adjusted. The vibration isolation pad with large stiffness and large damping can play a good role in limiting the powertrain, but the vibration isolation effect is poor; the vibration isolation pad with small stiffness and small damping The effect is good, but it cannot effectively limit the powertrain

In addition, the commonly used vibration isolation pad rubber leaks outside, which is easily corroded by oil and gas and aging, and has a short service life.

Although hydraulic vibration isolators and semi-active and active isolators can meet the requirements, they have defects such as high cost, complicated manufacturing process, low stability, poor maintainability, and large mass and volume.

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