SHOCK-ABSORBING SPRING OF KOCHETOV WITH ADDITIONAL DAMPING ELEMENT Russian patent published in 2017 - IPC F16F3/04 F16F7/01 F16F13/02 

FIELD: machine engineering.

SUBSTANCE: spring contains a body made of helical hollow elastic steel tube. The additional elastic steel tube is installed inside the body with a gap. A friction element is located in the gaps between the tubes. A helical solid elastic pin is set coaxially to the body. The friction element is made in the form of a granular backfill made of sintered copper-based friction material. The combined spring is located inside the vibration damping spring. The spring is made as a cylindrical screw and contains two parts with opposite directed ends. The first spring part has rectangular section turns with rounded edges, and the second part is made hollow. The on-coming end of the first part is located in the cavity of the second part. The segmental profile gaps of the contacting spring parts are filled with antifriction lubricant. The sealing collar is mounted on the end of the second part of the spring. The first part of the helical spring is enclosed by the tube of a damping material. The gaps between the spring and the tube are filled with crumb of friction material.

EFFECT: increase in the efficiency of vibration isolation in resonance mode.

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