摘要:
A propeller includes a bushing, a propeller body, and a propeller damper. The bushing includes a first cylinder portion surrounding the propeller shaft and a first projection protruding outwardly in a radial direction of the propeller from an outer peripheral surface of the first cylinder portion. The propeller body includes a second cylinder portion surrounding the bushing and a second projection protruding inwardly in the radial direction from an inner peripheral surface of the second cylinder portion. The first and second projections are arranged along a rotation direction of the propeller. The propeller damper includes first and second dampers side by side along an axial direction of the propeller between the first and second cylinders. The first and second dampers are separated from each other by a separation portion, and are individually elastically deformable.
摘要:
A system for rotating an inner propeller shaft within a gearcase via a driveshaft. The system includes a stub shaft that extends between forward and aft ends and is rotatable within the gearcase. A forward gear is rotatably coupled to the stub shaft, where the forward gear meshes with the driveshaft and is engageable to become rotatably fixed to the stub shaft such that rotating the driveshaft rotates the stub shaft. A shock absorbing coupler is positioned within the gearcase, where the coupler has forward and aft ends, where the forward end of the coupler is engageable with the aft end of the stub shaft, and where the aft end of the coupler engageable with the inner propeller shaft. The coupler is torsional between the forward and aft ends such that shock is absorbable between the inner propeller shaft and the driveshaft.
摘要:
In an upper mount portion, a steering central axis related to a steering force of a steering handle and a vibration central axis related to a torque reaction force of an engine are configured to be shifted back and forth. A mount member is formed such that a spring constant related to the vibration central axis is smaller than a spring constant related to the steering central axis.
摘要:
A marine propulsion support system includes a transom bracket, a swivel bracket, and a mounting bracket. A drive unit is connected to the mounting bracket by a plurality of vibration isolation mounts, which are configured to absorb loads on the drive unit that do not exceed a mount design threshold. A bump stop located between the swivel bracket and the drive unit limits deflection of the drive unit caused by loads that exceed the threshold. An outboard motor includes a transom bracket, a swivel bracket, a cradle, and a drive unit supported between first and second opposite arms of the cradle. First and second vibration isolation mounts connect the first and second cradle arms to the drive unit, respectively. An upper motion-limiting bump stop is located remotely from the vibration isolation mounts and between the swivel bracket and the drive unit.
摘要:
An outboard motor having an outboard motor body generating a thrust by rotating a propeller that is driven by an engine mounted to the outboard motor and an attachment device for attaching the outboard motor body to a hull. The outboard motor includes a mount device having an upper mount and a lower mount arranged between the outboard motor body and the attachment device for attaching the outboard motor body to the hull and supports an upper portion and a lower portion of the outboard motor body, respectively. The mount device also includes an anti-vibration unit and a displacement restriction unit. The lateral displacement restricting mount section and a member opposing the lateral displacement restricting mount section abut against each other with the abutment surfaces inclined with respect to a longitudinal direction of the outboard motor body.
摘要:
A propeller includes a bushing that rotates together with the propeller shaft, and a propeller damper disposed around the bushing, and an inner cylinder that surrounds the bushing via the propeller damper. The bushing includes a first cylindrical portion surrounding the propeller shaft, and a first protrusion protruding outward from the first cylindrical portion and integral with the first cylindrical portion. The inner cylinder includes a second cylindrical portion surrounding the bushing via the propeller damper and a second protrusion protruding inward from the second cylindrical portion. The inner cylinder is rotatable with respect to the bushing between a noncontact position and a contact position.
摘要:
A mounting arrangement is provided for mounting a boat drive to a boat hull and includes a mounting collar including a first plate having a first opening therein and a first wall extending from a top surface of the first plate around the first opening and defining a first cylinder. The mounting arrangement also includes a clamping collar including a second plate having a second opening therein and a second wall extending from a top surface of the second plate around the second opening and defining a second cylinder, an external shape of at least a top end of the first cylinder substantially matching an internal shape of at least a bottom end of the second cylinder. The first wall of the mounting collar has a first alignment member and the second wall of the clamping collar has a second alignment member, the first alignment member and the second alignment member being positioned so that, when the first plate is mounted against an exterior of the boat hull and the second plate is mounted against an interior of the boat hull with the first cylinder received in the second cylinder, the first alignment member and the second alignment member align when the boat hull is at least a predetermined thickness.
摘要:
An outboard motor has a construction in which the area of an exhaust passage can be secured easily and exhaust noise is less likely to escape into the air, allowing the exhaust noise to be lowered. The outboard motor includes a lower case, a propeller shaft rotatably supported in the lower case, a propeller fixed to the propeller shaft, an engine, and a power transmission mechanism through which a driving force from the engine is transmitted to the propeller shaft to rotate the propeller. An exhaust case is provided in the lower case. The exhaust case includes an upper exhaust passage above the propeller shaft, the upper exhaust passage directing therethrough an exhaust gas from the engine, an exhaust outlet which is open in a rearward direction of the propeller shaft, and a communication exhaust passage arranged to communicate the upper exhaust passage with the exhaust outlet.
摘要:
In an outboard motor, an extension case (member constituting a frame of the outboard motor) has the natural frequency (resonance frequency) of higher than the vibration frequency produced when the engine operates at maximum speed. Since this configuration prevents the extension case from resonating during operation of the outboard motor, noise (more specifically, noise produced by the outboard motor) propagated to the outside can be reduced.
摘要:
A outboard motor mounting system where there is a device for connecting the steering shaft to the drive shaft housing and lower unit comprised of an attaching bracket at least partially encircling and engaging the drive shaft housing and lower unit. There is also a splash plate to deflect water splashed by the driveshaft housing and lower unit that is formed integrally with the attaching bracket comprising a surface extending forwardly and laterally from the main body of the attaching bracket.