Title:
BEARING PART STRUCTURE OF JET PUMP FOR SMALL HYDROPLANING CRAFT
Document Type and Number:
Japanese Patent JP3505697
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To improve the durability of a whole bearing part by reducing the diameter of a forward seal part so that a bearing part of a jet pump for a small hydroplaning craft can be fitted from the rear side to avoid that the diameter of a hub part of an impeller is larger than required, bearing the thrust of a rotary shaft by a rear bearing, and dispersing the load to each bearing.
SOLUTION: In a bearing part structure of a jet pump 17 for a small hydroplaning craft in which a rotary shaft 12 of an impeller is supported on bearings 35, 36 arranged on each side before and behind a bearing housing 34 formed rearward of an impeller 18, the outer diameter of a seal part 37 of the bearing housing 34 is smaller than the outer diameter of a forward bearing 35, and the outer diameter of an impeller rotary shaft 12c of a part located between the bearings 35, 36 is not greater than the inner diameter of the forward bearing 35, and a separate collar member 38 is arranged. A member 43 to be abutted on a rear end part of an inner ring of the rear bearing 36 is fixed to an impeller rotary shaft 12e in an attachable/detachable manner to/from its rear end.
Inventors:
Yasuhiko Hemmi
Application Number:
JP28651395A
Publication Date:
March 08, 2004
Filing Date:
October 06, 1995
Export Citation:
Assignee:
YAMAHA HATSUDOKI KABUSHIKI KAISHA
International Classes:
B63H11/08; F16C19/06; F16C19/18; F16C19/56; F16C35/06; (IPC1-7): F16C19/56; B63H11/08; F16C19/06; F16C35/06
Domestic Patent References:
| JP62261594A | ||||
| JP3253493A | ||||
| JP5105189A | ||||
| JP438598Y1 |
Attorney, Agent or Firm:
Masahiko Yamaguchi