Outboard motor

Abstract

An outboard motor includes: an outboard motor body, and a mounting mechanism provided in front of the outboard motor body and mounts the outboard motor body on a boat. The outboard motor body includes: a motor; a drive shaft; a first transmission mechanism transmits rotation of the motor to the drive shaft; a propeller shaft in which a propeller is provided; and a second transmission mechanism transmits rotation of the drive shaft to the propeller shaft. The first transmission mechanism is disposed so that a front part thereof is positioned above a mounting mechanism and a rear part thereof is positioned above the motor.

1 . An outboard motor comprising:
 an outboard motor body; and   a mounting mechanism provided in front of the outboard motor body and configured to mount the outboard motor body on a boat, wherein   the outboard motor body includes:   a motor; a drive shaft; a first transmission mechanism configured to transmit rotation of the motor to the drive shaft; a propeller shaft in which a propeller is provided; and a second transmission mechanism configured to transmit rotation of the drive shaft to the propeller shaft, and   the first transmission mechanism is disposed so that a front part of the first transmission mechanism is positioned above the mounting mechanism and a rear part of the first transmission mechanism is positioned above the motor.   
     
     
         2 . The outboard motor according to  claim 1 , wherein
 the mounting mechanism includes:   a clamp bracket configured to fix the outboard motor body to the boat; and   a swivel bracket being connected to the clamp bracket and configured to support the outboard motor body to be pivotable in a left-right direction relative to the boat, and   the front part of the first transmission mechanism is positioned above the swivel bracket.   
     
     
         3 . The outboard motor according to  claim 2 , wherein
 the drive shaft extends in a vertical direction and is disposed in front of the motor,   the first transmission mechanism includes:   a first rotation transmission element configured to input the rotation of the motor to the first transmission mechanism; and   a second rotation transmission element configured to output the rotation of the motor input to the first transmission mechanism from the first transmission mechanism to the drive shaft, and   the first rotation transmission element is disposed above the motor and coaxially with an output shaft of the motor,   the second rotation transmission element is disposed above the drive shaft and coaxially with the drive shaft, and   a portion of the second rotation transmission element is positioned above the swivel bracket.   
     
     
         4 . The outboard motor according to  claim 1 , wherein
 the first transmission mechanism includes:   a drive sprocket configured to input the rotation of the motor to the first transmission mechanism;   a driven sprocket configured to output the rotation of the motor input to the first transmission mechanism from the first transmission mechanism to the drive shaft; and   a silent chain stretched across the drive sprocket and the driven sprocket.   
     
     
         5 . The outboard motor according to  claim 1 , further comprising:
 an inverter configured to control driving of the motor, wherein   the inverter is disposed above the first transmission mechanism.   
     
     
         6 . The outboard motor according to  claim 1 , wherein
 the mounting mechanism includes: a clamp bracket configured to fix the outboard motor body to the boat; a pilot shaft that serves as an axis of pivoting of the outboard motor body in a left-right direction; a swivel bracket that is connected to the clamp bracket and configured to support the pilot shaft to be pivotable; an upper mount configured to connect an upper end of the pilot shaft to the outboard motor body; and a lower mount configured to connect a lower end of the pilot shaft to the outboard motor body, and   the first transmission mechanism is positioned above the upper mount.   
     
     
         7 . The outboard motor according to  claim 6 , wherein the motor is disposed below the upper mount, and the first transmission mechanism is disposed above the upper mount. 
     
     
         8 . The outboard motor according to  claim 6 , further comprising:
 a pair of left and right upper mounts, wherein   the drive shaft passes between the pair of upper mounts.   
     
     
         9 . The outboard motor according to  claim 1 , further comprising a case configured to accommodate the first transmission mechanism, wherein
 the case is disposed above the motor, and   a shift actuator that controls switching of a rotation direction of the propeller is attached to the case.   
     
     
         10 . The outboard motor according to  claim 3 , wherein
 each of the first rotation transmission element and the second rotation transmission element is one of a gear, a sprocket, or a pulley.