Air spring

Abstract

The invention provides an air spring. The air spring comprises an upper cover, an air bag, a first rubber-metal pad and a second rubber-metal pad, wherein the air bag is arranged between the upper cover and the first rubber-metal pad; the first rubber-metal pad is hollowly arranged so as to form a cavity; the cavity of the first rubber-metal pad penetrates the top of the first rubber-metal pad ina vertical direction; the top of the first rubber-metal pad is connected to a first supporting part; the top of the first supporting part corresponds to the upper cover, so that when the air bag is airless, the first supporting part makes contact with the upper cover; the second rubber-metal pad is fixedly arranged inside the first rubber-metal pad in a sleeving manner; the top of the second rubber-metal pad is connected to the second supporting part; the top of the second supporting part corresponds to the upper cover, so that when the air bag is airless, the second supporting part makes contact with the upper cover; and when the air bag has air, a height difference delta h exists between the top of the second supporting part and the top of the first supporting part and is not equal to 0.The air spring can ensure the riding comfort of a vehicle under a low load condition, and meanwhile effectively prevents other parts from being damaged due to sinking of a vehicle body under a heavyload condition.

Description

technical field [0001] The invention belongs to the technical field of rail vehicle damping equipment, and in particular relates to an air spring. Background technique [0002] The air spring is installed between the car body and the bogie, and its function is to transmit vertical load, lateral load and torque, etc., absorb vertical and lateral vibration, provide horizontal restoring force, etc., and has a great influence on the stability and comfort of the vehicle. influences. The air spring includes an upper cover, an air bag and a rubber stack. The upper cover is located under the car body or bolster, which functions as a seal and load transfer. The air bag is located under the upper cover, and the rubber stack is located under the air bag. When the air spring is inflated normally When the air spring is out of air due to the failure of the airbag or other reasons, the rubber pile plays the main role of damping, so as to ensure that the vehicle is in the speed limit state...

AI Technical Summary

Problems solved by technology

However, the existing air spring products all use a rubber stack or two rubber stacks connected in series. When the rubber stack is compressed by the upper cover, the vertical load and vertical displacement present an approximately exponential relationship. The load-vertical displacement curve is a continuous curve, which leads to a gentle increase in the stiffness of the rubber pile when changing from a low-load condition to a heavy-load condition, so that the rubber pile is stable under heavy load and no-load conditions. The deflection difference is large, and it is impossible to effectively avoid damage to other components due to the sinking of the car body

Images