Split type combined spring

Abstract

The invention discloses a split type combined spring which comprises a core shaft, a base, and multiple sections of optional arc-shaped elastomers. A pressing cavity is arranged on the base; at leasttwo sections in each section of arc-shaped elastomer are arranged along the circumferential direction of the pressing cavity at an interval; various sections of arc-shaped elastomers arranged circumferentially enclose at the center position so as to form a force applying cavity; and the core shaft penetrates through the force applying cavity and peripherad extrudes each section of arc-shaped elastomer so as to press the elastomer to the annular inner wall of the pressing cavity. The split type combined spring has the advantages that production and manufacture can be carried out conveniently, the manufacturing rejection rate is reduced, pre-compressing processing can be carried out, the product adjustment dimensionality is improved, the flexibility is improved, and the like.

Description

technical field [0001] The invention relates to the technical field of vibration isolation and damping of vehicles and engineering machinery, in particular to a split-type combined spring. Background technique [0002] The existing similar spring is mainly a rubber-metal laminated spring, and the metal part and the rubber part are vulcanized into a whole. For example, the conical axle box spring of the rail vehicle bogie, because this type of structural spring greatly simplifies the positioning structure of the rail vehicle bogie axle box, and has good vibration reduction and vibration isolation effects, so it is used on the urban rail subway vehicle bogie. Tons of applications. Many large industrial equipment also use this spring for vibration isolation. [0003] Existing products are mainly vulcanized into a whole by rubber and interface metal parts, so the rubber part cannot be pre-compressed, so from a functional point of view, the improvement of fatigue life is limite...

AI Technical Summary

Problems solved by technology

[0003] Existing products are mainly vulcanized into a whole by rubber and interface metal parts, so the rubber part cannot be pre-compressed, so from a functional point of view, the improvement of fatigue life is limited; and because there is no pre-compression assembly after the vulcanization process, If the rubber profile design or vulcanization process design of the spring is slightly inappropriate, it will easily cause the internal residual tensile stress after vulcanization of the rubber, especially the bonding part between the rubber and the metal, which will lead to premature cracks in the rubber part and seriously reduce the product quality. fatigue reliability

[0004] In addition, usually the size of this type of spring product is larger, because of the overall vulcanization molding, the vulcanization molding mold is larger

This type of mold not only consumes a lot of metal materials and machining man-hours, but also if the flow channel design of the mold is slightly unreasonable, its metal parts such as spacers are prone to plastic deformation during the vulcanization process, resulting in product scrapping

And because the mold of this kind of product is large and heavy, it is necessary to design and process the corresponding tooling and other equipment for the mold loading and demoulding process of the product, which increases the manufacturing cost and production cycle

[0005] The existing spring is vulcanized into a whole due to metal and rubber. When the size of the installation interface remains unchanged but the performance requirements change, the product must be completely redesigned and manufactured, and the original interface metal parts cannot be fully reused, resulting in a long product development and trial production cycle. , high cost, more difficult to achieve standardization and serialization of product structure

Moreover, during use, when a part is damaged, the damaged part cannot be replaced separately, but can only be replaced as a whole, which wastes a lot of resources and also leads to high application maintenance costs

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