7results about How to "Accurate braking" patented technology

The application discloses an AMT intermediate shaft brake control method. When the clutch is separated and the gear shifting is completed, the estimated gear-in speed difference at a certain set time after the current time is calculated after a period of time, and the current time is determined to be open brake valve for intermediate shaft brake or close brake valve for gear shifting according to the estimated gear-in speed difference. The application compares the estimated gear-in speed difference at the set time with the set speed threshold, opens or closes the valve in advance at the set time after the comparison, ensures that the valve action corresponds to the system response time, controls the continuous reduction of the speed, realizes the accurate brake, and avoids the problems of impact and tooth collision.

The utility model relates to the technical field of crane cranes, and discloses a crane crane with a bottom protection device, which comprises a cantilever, chutes are arranged on the outer walls of two ends of the cantilever, a movable frame is arranged at the bottom of the cantilever, two groups of pulleys distributed at equal intervals are movably connected to two ends of the inner wall of the movable frame, and the bottoms of the pulleys are in sliding fit with the bottoms of the inner walls of the chutes. A brake box is fixedly connected to the outer wall of one end of the movable frame, a forward and reverse motor is fixedly connected to the top of the inner wall of the brake box, a rotating shaft at the bottom of the forward and reverse motor is fixedly connected with a lead screw, and a connecting shaft at the bottom of the lead screw is movably connected to the bottom of the inner wall of the brake box. The problem that braking is delayed or excessive in the prior art is solved, the operation safety is remarkably improved, meanwhile, the moving frame moves on the cantilever more smoothly and flexibly, the device adapts to the complex operation environment, the safety of equipment and personnel is guaranteed in an all-around mode, the service life of the equipment is prolonged, and the practical value is high.

The utility model discloses an adjusting screw and a handle, relates to the technical field of brake handles, and aims to solve the technical problems that the installation operation of a current brake cable is tedious, and the adjustment of the brake cable consumes time, the adjusting screw comprises an adjusting mechanism, the adjusting mechanism comprises a threaded pipe and a limiting ring, the outer surface of the threaded pipe is provided with threads, and the limiting ring is arranged on the threaded pipe. A rotating pipe is integrally formed at the tail end of the threaded pipe, a first wire inlet notch is formed in the outer surface of the threaded pipe in the long axis direction, a second wire inlet notch is formed in the rotating pipe in the long axis direction, the first wire inlet notch communicates with the second wire inlet notch, and the limiting ring is installed on the outer surface of the threaded pipe in a threaded mode. The limiting ring is provided with a third wire inlet gap, and the width of the third wire inlet gap is consistent with the width of the first wire inlet gap. The electric bicycle has the advantages that installation steps can be simplified, installation and adjustment time is shortened, hand fatigue of a rider is relieved through the power assisting structure, and comfort and safety are improved.

This utility model discloses a precast power wall end mold with a walking mechanism, relating to the field of precast power wall technology. It includes a mold body, a first mold support welded to the bottom of the mold body, an inclined support welded to the side of the mold body opposite to the casting side, a first roller and a second roller mounted on the first mold support, an independent roller mounted on the inclined support, and a braking device for braking the first roller. The lowest points of the wheel surfaces of the first roller and the independent roller are at the same height, used for rolling support on the top plane of the upper horizontal section of an I-beam track. The second roller is a conical wheel located below the first roller, used for rolling against the bottom inclined surface of the upper horizontal section of the I-beam track. When used as the end mold of a precast power wall casting equipment, this utility model's precast power wall end mold achieves more stable movement and excellent controllability.

A novel pneumatic winch dual-control safety operation method includes a first hand-operated valve, a first pneumatic control valve, a second pneumatic control valve, a third pneumatic control valve, a fourth pneumatic control valve, a first one-way valve, a one-way throttle valve, and a quick-release valve. The control air circuit of the personnel-carrying pneumatic winch described in this invention includes a basic control air circuit and a safety protection air circuit. The safety protection air circuit mainly includes an emergency stop protection air circuit, a travel limit protection air circuit, a slack rope protection air circuit, an overload protection air circuit, an air cut-off braking protection air circuit, and an emergency release protection air circuit. When the above safety protection air circuits are activated, they can all ensure that the winch stops and brakes quickly, with high reliability, maximizing the safety of people and property on the pneumatic winch. It is simple to operate, precise to control, reliable to run, energy-saving and environmentally friendly.

This invention discloses a magnetic levitation circular conveying device and method, comprising: a mounting base, a controller, a circular magnetic levitation stator rail, a material conveying mechanism, a braking mechanism, a fixing frame, a linear motion module, and a vision recognition module; the controller is disposed on the front side of the mounting base; the circular magnetic levitation stator rail is mounted on the top of the mounting base; several material conveying mechanisms are spaced apart on the inner side of the circular magnetic levitation stator rail; the braking mechanism is disposed below the circular magnetic levitation stator rail; the fixing frame is mounted on the rear side of the mounting base; and the linear motion module is disposed on the top left side of the fixing frame along the front-rear direction. This magnetic levitation circular conveying device and method can achieve rapid braking during high-speed magnetic levitation circular conveying, shortening the braking distance, and can achieve precise braking during the conveying of heavier materials, making the material movement position more accurate.

The utility model provides a positioner special for three-axis grinding, which belongs to the technical field of material grinding and comprises a base, a positioning mechanism, a positioning mechanism and a positioning mechanism. The transmission wheel is rotationally arranged on the upper surface of the base, a rotating disc is fixedly arranged on the transmission wheel, and the rotating disc indirectly provides support for the cross beam; the driving gear is rotationally arranged on the base, and a gear ring corresponding to the driving gear is further arranged on the outer surface of the transmission wheel; the limiting groove is annularly formed in the bottom face of the rotating disc and located on the same axis with the rotating disc, and the inner diameter of the limiting groove is larger than the outer diameter of the gear ring; the dustproof cover is of a hollow tubular structure and is fixed to the upper surface of the base, and the top of the dustproof cover is located in the limiting groove; the dustproof box extends from the side wall of the dustproof cover, is of a box structure, is fixed to the upper surface of the base and is located outside the driving gear; the driving wheel and the rotating structure on the base can be protected through the dustproof cover and the dustproof box, so that the service life of the positioner is effectively prolonged, and the maintenance frequency of the positioner is reduced.