A suspension device includes an outer tube formed of a cylindrical body an inner tube disposed coaxially with the outer tube and provided to be movable relative to the outer tube, a tip end of the inner tube being disposed inside the outer tube, a cable harness extending from an outer side of the outer tube or the inner tube to an inner side and configured to be energized, a stroke sensor configured to detect a movement amount of the inner tube relative to the outer tube, two connection members disposed between the stroke sensor and the cable harness and connecting the stroke sensor and the cable harness, and a correction unit disposed inside the outer tube or the inner tube and configured to correct the movement amount detected by the stroke sensor based on a temperature inside the outer tube or the inner tube.

A shock absorber includes a cylinder, a rod, a first damping force generating portion, and a second damping force generation portion. The second damping force generating portion includes a flow path which passes through the piston in the axial direction, a valve which opens and closes an opening portion at the second end portion side of the flow path, and an adjustment unit which adjusts a force required to open the valve from an outer side of the rod.

A shock absorber includes a cylinder, a spring, a receiving member, a sensor, and a coupling member. The sensor includes a coil portion, and a core portion. The coupling member is formed integrally with the core portion. A recessed portion is formed in one of the receiving member and the coupling member, a protruding portion facing the recessed portion is formed in the other one of the receiving member and the coupling member, and the receiving member and the coupling member are coupled to each other via the recessed portion and the protruding portion.

A shock absorber includes a cylinder, a spring, a receiving member, a sensor, and a coupling member. The sensor includes a coil portion, and a core portion. The coupling member is formed integrally with the core portion. A recessed portion is formed in one of the receiving member and the coupling member, a protruding portion facing the recessed portion is formed in the other one of the receiving member and the coupling member, and the receiving member and the coupling member are coupled to each other via the recessed portion and the protruding portion.

A shock absorber includes a first damping force generating portion, and a second damping force generating portion. The second damping force generating portion includes a first flow path, an opening and closing member, an adjustment unit which adjusts a position of the opening and closing member in the axial direction, a second flow path which is located at a different position from the first flow path and passes through the piston in the axial direction, and a second valve which is disposed at an end portion of the second flow path at a side of a second end portion which is an end portion at an opposite side to the first end portion in the axial direction, and which opens and closes the second flow path.

A shock absorber includes a first damping force generating portion which is fixed to a first end portion of a cylinder in an axial direction thereof, a second damping force generating portion which is disposed to be movable in the axial direction in the cylinder. The second damping force generating portion includes a first flow path which passes through a piston in the axial direction, the piston partitioning a space inside the cylinder, a first valve which opens and closes the first flow path, a first adjustment unit which adjusts a force required to open the first valve, a second flow path which is located at a different position from the first flow path and passes through the piston in the axial direction, a second valve which opens and closes the second flow path, and a second adjustment unit which adjusts a force required to open the second valve.

Transportation vehicles, suspension systems and related methods are provided herein. For example, a three wheeled vehicle is provided that can include a frame having a first side and second side and a front end and a rear end and a steerable front wheel secured to the front end of the frame. The vehicle can also include a first trailing wheel arm having a first rear wheel secure thereto and a second trailing wheel arm having a second rear wheel secure thereto. The vehicle can also include a central suspension joint secured to the frame on which the first trailing wheel arm is rotatably secured and the second trailing wheel arm is rotatably secured on either side of the frame. Further, the vehicle can include a horizontal linkage having a first end and a second end and a midsection between the first and second ends. The horizontal linkage can be pivotably connected to a pintle on the frame at the midsection beneath the first and second trailing wheel arms with the horizontal linkage linked to an underside of the first trailing wheel arm between the first wheel and the central suspension joint proximal to the first end of the horizontal linkage and linked to an underside of the second trailing wheel arm between the second wheel and the central suspension joint proximal to the second end of the horizontal linkage.

Transportation vehicles, suspension systems and related methods are provided herein. For example, a three wheeled vehicle is provided that can include a frame having a first side and second side and a front end and a rear end and a steerable front wheel secured to the front end of the frame. The vehicle can also include a first trailing wheel arm having a first rear wheel secure thereto and a second trailing wheel arm having a second rear wheel secure thereto. The vehicle can also include a central suspension joint secured to the frame on which the first trailing wheel arm is rotatably secured and the second trailing wheel arm is rotatably secured on either side of the frame. Further, the vehicle can include a horizontal linkage having a first end and a second end and a midsection between the first and second ends. The horizontal linkage can be pivotably connected to a pintle on the frame at the midsection beneath the first and second trailing wheel arms with the horizontal linkage linked to an underside of the first trailing wheel arm between the first wheel and the central suspension joint proximal to the first end of the horizontal linkage and linked to an underside of the second trailing wheel arm between the second wheel and the central suspension joint proximal to the second end of the horizontal linkage.

The hydraulic drive powered endless track drive motorcycle is a track cycle comprising a front track assembly, a rear track assembly, a power plant, and a frame. The front and rear track assemblies use an endless track circulating around a driven sprocket, bogie sprockets, and idlers to distribute the weight of the vehicle and provide greater traction than a tire would provide. The track assemblies are driven by hydraulic motors that receive pressurized hydraulic fluid from a power plant mounted to the frame. The power plant comprises an internal combustion engine driving a hydraulic pump and a hydraulic expansion tank. A seat is mounted to the top of the frame. The front track assembly is steerable using handlebars and a suspension system pivotably mounted to the front of the frame.

A control device is configured to control a damping force of a damping device using a difference between a front-rear acceleration of a vehicle main body and a rotational acceleration of a vehicle wheel, the damping device being configured to dampen a force generated between the vehicle main body and the vehicle wheel.