Machine element or mechanism – Elements – Cranks and wrist pins
Patent
1992-07-14
1993-01-05
Luong, Vinh T.
Machine element or mechanism
Elements
Cranks and wrist pins
74 42, 403274, 1525027, 1525030, 29520, F16C 304, F16H 2118, B25G 328, A47L 100
Patent
active
051760444
ABSTRACT:
A connection and two step method of manufacturing is disclosed for a drive unit for a wiper arm system which consists of a wiper shaft mounted in a bore through a crank arm. The wiper shaft is formed with a groove disposed within the thickness of the crank arm and material from one surface of the crank arm is displaced to form an annular recess which causes crank arm material adjacent the groove to be radially displaced into a groove formed in the wiper shaft to form an axial holding element. The radial distance R1 of the recess from the crank arm bore is substantially equal to the axial distance A1 of the groove below the one crank arm surface to facilitate the extruding process. Knurled areas on the shaft on either side of the groove are press fit into the crank arm bore as a first step in assembling the shaft to the crank arm, bringing a flange into abutment against the other surface of the crank arm.
REFERENCES:
patent: 2067967 (1937-01-01), Kniepen
patent: 4249298 (1981-02-01), Kanamaru et al.
patent: 4335496 (1982-06-01), Kanamaru et al.
patent: 4848171 (1989-07-01), Steijger et al.
patent: 4878398 (1989-11-01), Heinrich
Bauer Kurt
Dorr Wilhelm
Edele Reinhard
Pfitzenmaier Werner
Roth Christian
Lewis J. Gordon
Luong Vinh T.
Seitter Robert P.
SWF Auto-Electric GmbH
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