COMBINED SPRING Russian patent published in 2009 - IPC F16F1/12 

FIELD: mechanical engineering.

SUBSTANCE: invention relates to general mechanical engineering and can be used in production of new spring-loading devices. Combined spring comprises a compression spring; round holders with diameter exceeding that of the spring and with an inner channel in the upper wall are mounted at the end turns of the compression spring. The upper wall shape is analogous to the end turn shape. The holders embrace the turn by two thirds or three fourth of the turn circle and are fixed on it by any way known. Part of the upper wall excluding the inner channel entry is fitted with lower vertical flanging which is set wider than the spring outer diameter and with its height being equal to the spring wire diameter. Prominent part of the channel is located below the upper wall. A flat stop with its height being equal to the spring washer height is rigidly fixed at the top of each holder; it is centred and set vertically. The washers are round with central symmetrical slot, the slot shape is analogous to that of the stop. The slot provides for free fitting of the washers at the stops with the possibility of being taken off, they can be fixed by a screw with tapered head. The screw is screwed into the threaded opening in the stop centre. A clearance hole with its diameter exceeding that of the screw is made coaxially to the threaded opening; the clearance hole has a tapered reaming of the screw head entry hole so that the head can be set countersunk in respect to the washer side surface. Spring-loaded parts or units of the machine which can be moved are rigidly or pivotally connected to the washer butts on the both ends. The possibility of spring-loading in two mutually inversed directions is provided.

EFFECT: possibility of spring-loading in two mutually inversed directions is provided.

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