Marine trolling motor with traction drive

Details Marine trolling motor with traction drive Marine trolling motor with traction drive

1987-11-30

1989-05-23

Basinger, Sherman D.

Marine propulsion

Electric drive for propelling means

440 75, 440 83, 74785, B63H 513

Patent

active

048326305

ABSTRACT:
A marine trolling propulsion system (2) has a lower submerged housing (4) including an electric motor (5) driving a propeller (6) through a reducing traction drive provided by rolling contact of threee balls (57-59) between split inner races (36 and 38) and an outer race (60) to drive a transfer member (68) which rotates the propeller (6). The inner race halves (36 and 38) are axially loaded by Belleville washers (72) providing constant axial force with axial deflection, and a limited maximum loading force capability to intentionally provide overload slip protection. The inner race halves (36 and 38) are keyed to the intermediate floating shaft (14) on raised hexagonal shoulders (32 and 34) permitting rocking of the inner race halves (36 and 38) and self-seating and alignment of the inner race halves to the balls (57-59). Couplers (16 and 124) are provided between the electric motor shaft (12) and an intermediate floating axial shaft (14) and between the transfer member (68) and the propeller shaft (70) which enable different axes of rotation to accommodate manufacturing variations. The transfer member (68) is also coupled to the propeller shaft (70) by structure (118, 126, 128) enabling the transfer member (68) to rock about the center of the propeller shaft (70) such that propeller thrust is transmitted equally to the balls (57-59).

REFERENCES:
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patent: 4092946 (1978-06-01), Kappas
patent: 4099478 (1978-07-01), Alexander, Jr.
patent: 4305012 (1981-12-01), Friedel
"A Development of the Traction Roller System for a Gas Turbine Driven APU", Nakamura et al., SAE Technical Paper 790106, 1979, pp. 1-9.
"Traction Drives Roll Up Impressive Gains", Machine Design, Oct. 24, 1985, pp. 68-75.
"Automotive Traction Drive CVTs--An Overview", Hewko, SAE Paper 861355, 1986, pp. 195-207.
"Roller Traction Drive For Quiet, High Speed Power Transmission", Hewko, SAE Paper 690572, 1979, pp. 1-12.
"Metal-To-Metal Traction Drives Now Have A New Lease On Life", Yeaple, reprinted from Product Engineering, Oct. 1971.
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"Traction Lubricant Increases Roller Drive Power Transmission", Soderholm, reprinted from Design News, Sep. 20, 1971.
"Lubricants For Traction Drives", Green et al., reprinted from Machine Design, May 2, 1974, pp. 1-7, Monsanto Industrial Chemicals Co.
"Santotrac: Synthetic Lubricants with `Grip`", Monsanto Chemicals Co., pp. 1-32.

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