82results about How to "Play a braking effect" patented technology

The invention relates to a power generation device, in particular to a vertical-axis clutch type wind power generation device so as to solve the problems that an existing large-power vertical-axis wind power generator is difficult in self-starting and braking and low in power generation efficiency. The vertical-axis clutch type wind power generation device comprises a wind wheel, a first transmission shaft, a wind wheel locking device, a first coupler, a second transmission shaft, a third coupler, a clutch, a speed increasing gear, a support, a second coupler, a power generator, a tower and two brake devices. The vertically-arranged first transmission shaft is rotationally arranged on the top of the tower, one brake device is arranged on the top of the tower, and the wind wheel locking device is arranged on the top of the part, below a flange plate, of the tower. The upper end of the first transmission shaft is connected with the wind wheel, the lower end of the first transmission shaft is connected with the first coupler, and the speed increasing gear is fixed to the support. The clutch is connected between the second transmission shaft and an input shaft of the speed increasing gear, an output shaft of the speed increasing gear is connected with an input shaft of the power generator through the second coupler, and the other brake device is arranged on a power generator shell. The vertical-axis clutch type wind power generation device is used for wind power generation.

The invention provides a fatigue strength test device for a parking brake of a wheelchair. The fatigue strength test device comprises a base, a support mechanism, a motor driving mechanism, a rear wheel driving mechanism of the wheelchair, a front wheel driving mechanism of the wheelchair and a parking brake repetitive operation mechanism of the wheelchair, wherein the rear wheel driving mechanism of the wheelchair can drive two rear wheels of the wheelchair to be tested to rotate; the front wheel driving mechanism of the wheelchair can drive the two front wheels of the wheelchair to be tested to rotate; and the parking brake repetitive operation mechanism of the wheelchair can carry out repetitive braking on the parking brake of the wheelchair to be tested. In the invention, the specified times of repetitive operation are carried out on the parking brake of wheelchair so as to assess the performance of the brake; and the fatigue strength test device has simple structure and is convenient to operate.

The invention belongs to the technical field of transport vehicles and particularly relates to a semitrailer axle. The semitrailer axle comprises a mounting plate, an axle main body, a rotating ring,a first mounting rod, a second mounting rod, a mounting ball and a rotating wheel; the mounting plate is fixedly arranged on the lower surface of the back end of a vehicle body; the right surface wallof the mounting plate is fixedly connected with a lifting spring; the right end of the lifting spring is connected with the internal left end of the mounting all; the right end of the lifting springis fixedly connected with a buffer block; is arranged in a sliding groove in the left end of the mounting ball in a sliding way; the mounting ball is fixedly connected with the upper end of the firstmounting rod; the lower end of the first mounting rod is fixedly connected with the upper surface of the rotating ring; the first mounting rod is arranged in parallel with the mounting plate at the initial time; and the semitrailer axle is mainly used for solving the problems of property loss and life danger which may be caused by the fact that the semitrailer axle in the prior art cannot providea certain braking effect for the semitrailer when the semitrailer stops abruptly and the semitrailer can slide for a long distance during abrupt stop.