59results about How to "Improved resistance to heat fading" patented technology

The invention discloses a vehicle wheel rim composite brake device integrating permanent magnet braking and friction braking, and belongs to the field of vehicle braking. A support base ring is coaxially sleeved with an integrated brake disc, the support base ring is coaxially and fixedly sleeved with a magnetic circuit guide frame, a plurality of magnetic conductive pole pieces are evenly embedded in the side wall of the magnetic circuit guide frame in the circumferential direction, the support base ring is sleeved with a movable magnet support through a bearing, the support base ring is fixedly sleeved with a fixed magnet support, a plurality of movable magnets are evenly and fixedly connected to the outer wall of the movable magnet support in the circumferential direction, a plurality of fixed magnets are evenly and fixedly connected to the outer wall of the fixed magnet support in the circumferential direction, the movable magnets and one fixed magnet are arranged left and right inthe axial direction, the fixed magnets and the movable magnets which are opposite in the axial direction at the initial position are opposite in magnetizing direction, the movable magnets are rotatedto enable each movable magnet and the corresponding fixed magnet opposite to the movable magnet in the axial direction to be the same in magnetizing direction during permanent magnet braking, brakingenergy is shared through non-contact permanent magnet braking, and friction braking abrasion is reduced.

The invention discloses an active adjustment type air resistance retarding device on a car roof. The active adjustment type air resistance retarding device comprises a fixed support, a hydraulic oil way, at least one retarding secondary device and a control system. The retarding secondary devices comprise servo motors, hydraulic servo valves, air resistant blades and rotating shafts. The rotating shafts are supported on the fixed support through fixing assemblies in a rotating mode. The air resistant blades are fixedly connected to the rotating shafts. Input shafts of the hydraulic servo valves are connected with the servo motors, and output shafts of the hydraulic servo valves are connected with the rotating shafts. The control system comprises a speed sensor, a switch knob, blade position sensors and a controller used for controlling the servo motors and the hydraulic oil way to work, wherein the blade position sensors are arranged on the rotating shafts. According to the active adjustment type air resistance retarding device, the windward area of a car can be increased through automatic adjusting of angles or direct adjusting of the angles, retardant braking of the car can be achieved by means of air resistance, and the active adjustment type air resistance retarding device can convert weak signals into big hydraulic power to carry out adjustment, and is high in sensitivity and good in speedability.