Volume variable additional air chamber of air spring

Abstract

The invention discloses a volume variable additional air chamber of air spring. The outer part of the volume variable additional air chamber is a cylindrical air storage barrel, the inner cavity of the air storage barrel is circumferentially divided into eight equal sector cylindrical cells by the same partition boards, one side of each partition board is fixed on the inner wall of the air storage barrel, and the other side of each partition board stretches towards the center of the air storage barrel to form a closed cylindrical empty cavity tightly matched with a piston; the top end of the piston stretches out of the air storage barrel and is connected with a stepping motor through a screw rod; an altitude sensor is fixedly arranged on the top end face of the piston; the lower part of the air storage barrel is a lower sealing cover board, and a lower closed empty cavity is formed from the air storage barrel, the piston and the lower sealing cover board; a connecting hole communicated with a main air chamber is arranged in the center of the lower sealing cover board; and eight small holes communicated with the eight sector cylindrical cells in sequence are arranged on the side wall face of the cylindrical empty cavity, and the eight small holes are axially distributed along the cylindrical empty cavity from bottom to top in equal altitude difference. The volume of the additional air chamber can be rapidly changed so as to stabilize the air pressure of the main additional air chamber.

Description

[0001] Technical field: [0002] The invention relates to a component used for manufacturing a vehicle air suspension, in particular to a vehicle air spring. Background technique [0003] The air suspension system is increasingly used by large and high-end vehicles, which includes air springs, shock absorbers, guiding mechanisms, compressed air systems and vehicle height control systems. After the vehicle adopts the air suspension, it improves the ride comfort and ride comfort of the vehicle, reduces the impact load of the driving system components on the road surface, and has the ability to adjust the height of the vehicle body from the ground within a certain range. Air spring is a kind of non-linear elastic element that is filled with compressed air in a retractable airtight container and works with an aeroelastic spring. It has the functions of buffering and vibration isolation. The air spring with an additional air chamber is a key component of the air suspension. The...

AI Technical Summary

Problems solved by technology

Its defects are: first, the response of the volume change of the additional air chamber is slow, and the air pressure of the main auxiliary air chamber will be changed during the change process, resulting in a change of the spring stiffness and affecting the stability of the vehicle

Second, it is necessary to add oil supply equipment to the traditional additional air chamber, which not only increases the production cost, but also takes up a certain space in the actual installation process, which is not conducive to the reasonable arrangement of the air suspension; the hydraulic oil in the additional air chamber also Easy to leak and cause pollution; the air pockets generated in the hydraulic oil will not only generate vibration and noise, but also damage parts and cause pressure and flow fluctuations

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