Abstract: A vehicle dynamometer system for dynamometer testing of a vehicle, comprises at least one dynamometer test unit having a power source, the power source comprising an output shaft arranged for, in use, rotation with a vehicle wheel shaft, the system further comprising an adapter plate, said adapter plate comprising fasteners for allowing fixed connection to a wheel hub of a wheel shaft being tested, said adapter plate further comprising fasteners for allowing fixed connection of the adapter plate to the output shaft of said dynamometer test unit to thereby connect the output shaft of the dynamometer test unit to said wheel shaft. The adapter plate is designed such that, when fixedly connected to said wheel hub but disconnected from said dynamometer test unit, said adapter plate is arranged to support the vehicle to allow relocation of said vehicle while supported by said adapter plate.

Abstract: A device for testing loading performance of a wheelchair motor, comprising a pedestal. A torque-speed transducer is fixed on the pedestal, one end being connected to a wheelchair motor to be tested while the other end thereof being connected to an adjustable magnetic powder brake. A pneumatic quick-clamping device is provided on the pedestal connected to the output shaft of the wheelchair motor to be tested, the pneumatic quick-clamping device being used for connecting and fixing the wheelchair motor to be tested, and comprising a support platform, a motor connecting plate and a plurality of cylinders. The support platform is supported and mounted above the pedestal through cylindrical bodies. The motor connecting plate is fixed with the wheelchair motor to be tested. The downward movement of the piston rods can compress the compression heads onto the motor connecting plate to compress and fix the motor connecting plate, thus to fix the wheelchair motor to be tested.

Abstract: A torque sensor having a plurality of axial grooves formed on an outer circumferential surface of the end portion of a first rotation shaft to which a cylindrical member is fixed so as to be extended in an axial direction of the first rotation shaft. A circumferential groove is continuously and circumferentially formed on the outer circumferential surface of the end portion of the first rotation shaft. A plurality of protrusions are formed on an inner circumferential surface of the cylindrical member to be fitted into the plurality of axial grooves respectively to thereby prevent a rotation of the cylindrical member relative to the first rotation shaft. A portion of the cylindrical member which is disposed outward of the circumferential groove is deformed to fit into the circumferential groove to thereby prevent an axial displacement of the cylindrical member relative to the first rotation shaft. Further, a coil unit having a coil is disposed so as to enclose a second rotation shaft.