The two standards applicable to leaf springs are shown in Fig. 25.11. These springs are essentially strips of flat metal formed in an elliptical arc and suitably tempered. They absorb and release energy, and are commonly found applied to suspension systems.
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Fig. 25.11 (a) and (b) conventional and simplified representations for a semi-elliptic leaf spring (c) and (d) conventional and simplified representations for a semi-elliptic leaf spring with fixing eyes
Fig. 25.11 (a) and (b) conventional and simplified representations for a semi-elliptic leaf spring (c) and (d) conventional and simplified representations for a semi-elliptic leaf spring with fixing eyes
The drawing conventions for a cylindrical right-hand helical torsion spring are shown in Fig. 25.10. (a) shows the usual drawing convention, (b) how to show the spring in a section and (c) gives the simplified representation.
Although torsion springs are available in many different forms, this is the only type to be represented in engineering-drawing standards. Torsion springs may be wound from square-, rectangular-, or round-section bar. They are used to exert a pressure in a circular arc, for example in a spring hinge and in door locks. The
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