Composite large V multi-wedge plate belt pulley and forming method

Abstract

The invention discloses a composite large V multi-wedge plate belt pulley and a forming method. The composite large V multi-wedge plate belt pulley comprises a pulley body of an integrally-formed structure, a centering hole is formed in the middle of the end face of the pulley body, a plurality of installation holes are distributed in the periphery of the centering hole and in the end face of thepulley body in a circumferential array mode, the side face of the pulley body comprises at least one V-shaped groove located in the upper portion and a PK-shaped groove located in the lower portion, the diameter of the PK-shaped groove is larger than the diameter of the V-shaped groove, the upper edge of the V-shaped groove is connected with the end face of the wheel body through an inwards-concave upper cambered surface, the lower edge of the V-shaped groove is connected with the PK-shaped groove through an inwards-concave lower cambered surface, and folding parts are formed between the lowerportion of the upper cambered surface and the upper portion of the V-shaped groove and between the lower portion of the lower cambered surface and the upper portion of the PK-shaped groove. The composite large V multi-wedge plate belt pulley has the advantages of light weight, low processing cost, high transmissible power and wide application range.

Description

technical field [0001] The invention relates to a pulley made of an inner plate of an automobile engine and a forming method thereof. Background technique [0002] At present, the plate spinning pulleys of automobile engines mainly use one set of grooves for transmission, and the pulleys that use two sets of grooves for different winding directions mostly use traditional casting and machining processes or use two plate spinning pulleys. However, the heavy weight of the cast pulley, the large moment of inertia, and the high cost of mass production are important reasons hindering the realization of lightweight automobiles; and the coaxiality between the two stages is difficult to guarantee in the superimposed assembly of two plate spinning pulleys, and the required The number of tooling molds is large and the cost is high. The Chinese patent "Spinning process and special tooling for manufacturing stepped spinning pulleys with different diameters" (publication number: CN108213...

AI Technical Summary

Problems solved by technology

[0002] At present, the plate spinning pulleys of automobile engines mainly use one set of grooves for transmission, and the pulleys that use two sets of grooves for different winding directions mostly use traditional casting and machining processes or use two plate spinning pulleys for superposition assembly. However, the heavy weight of the cast pulley, the large moment of inertia, and the high cost of mass production are important reasons hindering the realization of lightweight automobiles; and the coaxiality between the two stages is difficult to guarantee in the superimposed assembly of two plate spinning pulleys, and the required The number of tooling molds is large and the cost is high

The Chinese patent "Spinning process and special tooling for manufacturing stepped spinning pulleys with different diameters" (publication number: CN108213162A, publication date: 2018.06.29) solves the problem of step spinning pulleys with different diameters ( image 3 As shown), the upper and lower tooth grooves are not concentric, the installation size is unstable, etc., but the stepped spinning pulley with different diameters has a narrow transmission power range, which leads to a small range of applicable engine displacement

The Chinese patent "Spinning process of two-stage plate pulley and special tooling for this process" (publication number: CN108213161A, publication date: 2018.06.29) solves the problem of two-stage plate spinning pulley ( Figure 4 As shown), the groove shape is not formed, there are interlayers in the middle protruding part, and the power transmission range is also large. However, because the two-stage plate spinning pulley has a large number of teeth and the teeth are not easy to form, the processing is difficult, and spinning is required. The processing time is long, and the precision and tonnage of the spinning equipment are very high during processing, and the spinning equipment with a small tonnage cannot process the tooth shape.

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