Impeller driving device for cooling pump of electric outboard device

Abstract

The present disclosure relates to an impeller driving device for a cooling pump of an electric outboard device, configured so that a gearbox housing is installed on an outboard-device body and an impeller housing is installed against an outer surface of a right side of the gearbox housing on the outboard-device body to drive the impeller for the cooling pump of the electric outboard device.

Claims

1. An impeller driving device for a cooling pump of an electric outboard device, the impeller driving device comprising: a gearbox housing mounted to a body of the outboard device; an impeller housing mounted to the body against a wall of the gearbox housing, the impeller housing including a lower portion defining an inlet, and an upper portion defining an outlet; a propeller shaft of a propeller driving motor extending vertically through a central portion of the body and the gearbox housing; an impeller shaft of the cooling pump extending horizontally through the wall of the gearbox housing and into the impeller housing; a gear assembly arranged in the gearbox housing, the gear assembly including: a first bevel gear mounted to an upper portion of the propeller shaft via a first one-way bearing such that the first bevel gear is rotationally coupled to the propeller shaft when the propeller shaft rotates in a first direction, and the first bevel gear is rotationally decoupled from the propeller shaft when the propeller shaft rotates in a second direction, a second bevel gear mounted to a lower portion of the propeller shaft via a second one-way bearing such that the second bevel gear is rotationally decoupled from the propeller shaft when the propeller shaft rotates in the first direction, and the second bevel gear is rotationally coupled to the propeller shaft when the propeller shaft rotates in the second direction, and a third bevel gear mounted to a first end of the impeller shaft such that the third bevel gear meshes with the first bevel gear and the second bevel gear so as to transmit a rotating force of the propeller shaft to the impeller shaft; and an impeller blade mounted to a second end of the impeller shaft within the impeller housing, the impeller blade configured to suck cooling water through the inlet and discharge the cooling water through the outlet when the rotating force is transmitted to the impeller shaft thereby directly cooling the propeller driving motor, wherein the gear assembly is configured to rotate the impeller shaft in only one direction when the propeller shaft rotates in the first direction and when the propeller shaft rotates in the second direction.

Description

BRIEF DESCRIPTION OF THE DRAWING

(1) The FIGURE is a diagram illustrating an impeller driving device for a cooling pump of an electric outboard device according to an embodiment of the present disclosure.

BEST MODE

(2) Hereinafter, an embodiment of the present disclosure will be described in detail with reference to the accompanying drawing.

(3) The FIGURE is a diagram illustrating an impeller driving device for a cooling pump of an electric outboard device according to an embodiment of the present disclosure. The device includes a propeller shaft 1, first, second, and third bevel gears 2, 5 and 6, first and second one-way bearings 3 and 4, an impeller shaft 7, an impeller blade 8, an outboard-device body 10, a gearbox housing 20, an impeller housing 30, an inlet 32, and an outlet 34.

(4) The present disclosure will be described below in detail.

(5) Referring to the FIGURE, the present disclosure is a device in which the gearbox housing (20) is installed on the outboard-device body (10) and the impeller housing (30) is installed against an outer surface of a right side of the gearbox housing (20) on the outboard-device body (10) to drive the impeller for the cooling pump of the electric outboard device.

(6) The propeller shaft (1) provided in the propeller driving motor passes vertically through the central portion of the gearbox housing (20) and the outboard-device body (10).

(7) In the gearbox housing (20), the first bevel gear (2) having on a center thereof the first one-way bearing (3) that is locked clockwise and unlocked counterclockwise is coupled to an upper portion of the propeller shaft (1), the second bevel gear (5) having on a center thereof the second one-way bearing (4) that is locked counterclockwise and unlocked clockwise is coupled to a lower portion of the propeller shaft (1), and the third bevel gear (6) having on a center thereof the impeller shaft (7) that is coupled to extend to the right and penetrates the gearbox housing (20) and the inside of the impeller housing (30) is positioned between the right side of the first bevel gear (2) and the right side of the second bevel gear (5) to transmit the rotating force of the first and second bevel gears (2 and 5) as the counterclockwise rotating force. That is, as the first bevel gear (2) may rotate clockwise and the second bevel gear (5) may rotate counterclockwise, the impeller shaft (7) always rotates counterclockwise.

(8) In the impeller housing (30), the impeller blade (8) is installed on the right side of the impeller shaft (7). As the propeller shaft 1 rotates clockwise or counterclockwise, the impeller blade rotates counterclockwise, thus sucking water through the inlet (32) that is provided in a lower portion of the impeller housing (30) and discharging water through the outlet (34) that is provided in an upper portion of the impeller housing (30). In this way, the direct water cooling of the propeller driving motor is performed.

(9) Since the impeller driving device for the cooling pump of the electric outboard device according to the present disclosure is implemented as described above, an inexpensive impeller blade for an internal combustion engine that is widely available on the market can be used as is.

(10) According to the present disclosure, it is advantageously possible to implement a large electric outboard device through the following configuration. Regardless of the rotating direction of the propeller shaft (1) provided in the propeller driving motor, the impeller blade (8) in the impeller housing (30) is configured to rotate only in one direction, thus enabling the direct water cooling of the motor. As a result, the impeller blade (8) is not subject to overload due to reverse rotation, so damage to the blade is prevented. Further, the direct cooling method can be applied, thus increasing cooling efficiency and producing higher output compared to the air cooling or heat exchange method.

(11) Although the technical idea of the present disclosure has been described above with reference to the accompanying drawings, the preferred embodiment of the present disclosure is illustrative and not restrictive. In addition, it is apparent to those skilled in the art that various changes and modifications may be made without departing from the scope of the technical idea of the present disclosure.