An electromechanical actuator comprises a housing, a torque support (21) and a module for filtering vibrations (33). The torque support (21) comprises a shaft (35) extending along an axis of rotation (X) of the actuator. The module (33) is arranged inside the housing and comprises a transmission element (36), a stop (38) and first and second viscoelastic elements (39, 40). The transmission element (36) is mounted around the shaft (35) and is attached to the housing. The stop (38) is connected to the shaft (35). The first viscoelastic element (39) is arranged between the torque support (21) and a first end (36a) of the transmission element (36). The second viscoelastic element (40) is arranged between a second end (36b) of the transmission element (36) and the stop (38).

An outboard motor includes a drive shaft, a coupling to connect a first shaft and a second shaft of the drive shaft together, and a transmission including a dog clutch to transmit a rotation of the drive shaft to a propeller shaft. The coupling includes a first portion attached to the first shaft, a second portion attached to the second shaft, and a damper. The first portion includes first claws arranged along a rotation direction of the drive shaft. The second portion includes second claws between adjacent ones of the first claws in the rotation direction. The damper includes an elastic portion interposed between adjacent ones of the first claws and the second claws in the rotation direction.

A shock-absorbing member comprises held sections located at a plurality of locations in a circumferential direction and comprising paired held sections and non-paired held sections, and is constructed to have a non-circular cylindrical shape in cross-section. Portions where outer-diameter side end sections of held sections that are adjacent to each other in the circumferential direction are made continuous by way of outer-diameter side cover sections, and portions where inner-diameter side end sections of held sections that are adjacent to each other in the circumferential direction are made continuous directly or by way of inner-diameter side cover sections, in an alternating sequence in the circumferential direction. Drive-side arm sections are placed between the non-paired held sections, driven-side arm sections are placed between the paired held sections, and the outer circumferential surfaces of the drive-side arm sections are covered by the outer-diameter side cover sections.

A sealing structure with a torsional damper and an oil seal includes a damper pulley serving as a torsional damper and an oil seal. The damper pulley has an annular hub pocket that is recessed in the outer side direction and extends in the circumferential direction along a boss part of a hub. The oil seal includes a side lip that extends toward the outer side. An outer circumferential surface of the hub pocket increases in a diameter toward the outer side, the side lip of the oil seal does not enter inside the hub pocket, and an annular gap is formed between an outer side end of the side lip and an inner side end of the outer circumferential surface of the hub pocket.

A power transmitting device includes a first rotor and a second rotor rotatably disposed coaxially with a rotational central axis and in facing relation to each other, a single arc spring that is elastically deformable to a large extent and has a small modulus of elasticity, the arc spring being interposed between the first rotor and the second rotor for urging the first rotor and the second rotor to opposite sides in a ration direction, a first pressing protrusion projecting from the first rotor and a second pressing protrusion projecting from the second rotor, the first pressing protrusion and the second pressing protrusion being disposed in relative positions on superposed rotation trajectories, and a rubber member that is elastically deformable to a small extent and has a large modulus of elasticity, the rubber member being interposed between the first pressing protrusion and the second pressing protrusion with gaps therebetween.

A flexible shock-absorbing parts, suitable for use in a flexible damping device which connects and absorbs torque from two different mechanical shafts, so that they are coaxial during transmission. The flexible shock-absorbing parts is arranged between the two machines and closely attached to them; the flexible shock-absorbing parts are arranged radially on the first plane. The first plane is composed of the X-axis and the Y-axis in the Cartesian coordinate system. When the flexible shock-absorbing parts are installed in the vehicle, it allows the vehicle to absorb larger instantaneous external forces received by the wheels when the vehicle is travelling so that the impact of these external forces on the structure of the motor and the second gear inside the gear box can be reduced, thereby achieving protection for them.

A coupling (2) is disclosed. The coupling (2) comprises an outer member (4), an inner member (8), an intermediate member (6) and a plurality of buffer elements (18, 20). The outer member (4) comprises a plurality of radially inward projections (10), the inner member (6) comprises a plurality of radially outward projections (16) and the intermediate member (6) comprises a plurality of radially inward projections (14) and a plurality of radially outward projections (12). The plurality of buffer elements (18, 20) are disposed between the projections (10, 12, 14, 16). The plurality of radially inward projections (10) of the outer member (4) and the plurality of radially outward projections (12) of the intermediate member (6) are radially overlapped, and the plurality of radially outward projections (16) of the inner member (6) and the plurality of radially inner projections (14) of the intermediate member (6) are radially overlapped.

A power transmitting device includes a first rotor and a second rotor rotatably disposed coaxially with a rotational central axis and in facing relation to each other. A first pressing protrusion projecting from the first rotor and a second pressing protrusion projecting from the second rotor are disposed in relative positions on superposed rotation trajectories. A soft rubber member elastically deformable to a large extent and has a small modulus of elasticity and a hard rubber member elastically deformable to a small extent and has a large modulus of elasticity are interposed between the first and second pressing protrusions. While no relative torque load is being applied to the first and second rotors, the soft rubber member is held in contact with both the first and second pressing protrusions, and the hard rubber member is interposed between the first pressing protrusion and the second pressing protrusion with gaps therebetween.

A vehicle handlebar mounting device and system includes a handlebar clamping assembly, a steering clamping assembly and an isolator. The handlebar clamping assembly having an upper clamp component and a lower clamp component each having protrusions that extend outward from one surface and that are joined together to form a single circular opening for receiving a handlebar. An isolator that is constructed from an impact absorbing material includes a circular-shaped main body having a hollow central channel, a plurality of protrusions extending outward from one end and a plurality of apertures extending through the protrusions. Each of the apertures receiving the plurality of protrusions of the handlebar clamping assembly. The vehicle steering clamping assembly includes a riser and a clamp structure that form a circular opening for receiving the isolator and handlebar assembly.

A balancer shaft includes a shaft body, a driven gear, a fixed member fixed to the shaft body, and an elastic member located between the driven gear and the fixed body. A projection projects from the driven gear. The fixed member includes an accommodation recess accommodating the projection. The elastic member is arranged in the accommodation recess adjacent to the projection. The projection includes an abutment side surface, which includes an outer end. The outer end and the elastic member are spaced apart in the circumferential direction by a first distance when the abutment side surface and the elastic member are in abutment without elastically deforming the elastic member. The first distance is greater than a maximum value of an elastic deformation amount of the elastic member in the circumferential direction when the elastic member is pressed between the projection and a wall of the accommodation recess.