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, 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, wherein a propeller shaft provided in a propeller driving motor passes vertically through a central portion of the gearbox housing and the outboard-device body, wherein, in the gearbox housing, a first bevel gear having on a center thereof a first one-way bearing that is locked clockwise and unlocked counterclockwise is coupled to an upper portion of the propeller shaft, a second bevel gear having on a center thereof a second one-way bearing that is locked counterclockwise and unlocked clockwise is coupled to a lower portion of the propeller shaft, and a third bevel gear having on a center thereof the impeller shaft that is coupled to extend to the right and penetrates the gearbox housing and an inside of the impeller housing is positioned between a right side of the first bevel gear and a right side of the second bevel gear to transmit rotating force of the first and second bevel gears as counterclockwise rotating force, wherein, in the impeller housing, an impeller blade is installed on a right side of the impeller shaft, so that, as the propeller shaft rotates clockwise or counterclockwise, the impeller blade rotates counterclockwise, thus sucking water through an inlet that is provided in a lower portion of the impeller housing and discharging water through an outlet that is provided in an upper portion of the impeller housing, whereby direct water cooling of the propeller driving motor is performed.

Description

BRIEF DESCRIPTION OF THE DRAWING

[0017] 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

[0018] Hereinafter, an embodiment of the present disclosure will be described in detail with reference to the accompanying drawing.

[0019] 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.

[0020] The present disclosure will be described below in detail.

[0021] 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.

[0022] 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).

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.