96results about How to "Small volume and mass" patented technology

The invention discloses an eliminating device for a radial clearance at the connecting position of a folding and unfolding mechanism and belongs to the technical field of space mechanism unfolding, connecting locking and releasing. By means of the eliminating device for the radial clearance at the connecting position of the folding and unfolding mechanism, the existing problem that the radial clearance between a base body and an unfolding part after pin locking affects reliability and stability of the folding and unfolding mechanism is solved. By means of the eliminating device for the radialclearance at the connecting position of the folding and unfolding mechanism, the clearance between the unfolding part and a rotating shaft and the clearance between the side face of the unfolding partand the inner side face of the base body after unfolding part locking can be effectively eliminated while it is ensured that the unfolding part is unfolded smoothly, the influences on the rigidity and the base frequency of the clearances on the folding and unfolding mechanism are avoided, and the phenomenon that the anti-interference capability of the folding and unfolding mechanism is affected is prevented. In addition, a threaded section connection transmission manner is adopted between the rotating shaft and the unfolding part, and the beneficial effects that the connector strength is high, connection is convenient, repeated use is achieved, standardization is achieved are achieved, and stable and reliable clearance eliminating can be achieved under the cooperation of the mechanism. The eliminating device has the beneficial effects of being simple in structure, small in volume mass, high in responding speed and high in environment adaptability.

A self-excited eddy current liquid-cooled retarder is disclosed. The retarder pertains to an auxiliary braking device retarding a vehicle, and comprises a retarder rotor, a retarder stator, a control module and a generator unit. The retarder rotor comprises a retarder coil, an electromagnet core and a core cage. The retarder coil is wound on a coil frame. The electromagnet core is inserted into the coil frame. The electromagnet core, the retarder coil and the coil frame are evenly distributed on the circumference of the core cage. The retarder rotor is connected to a transmission shaft of an automobile. The inner circle of the retarder stator and the outer circle of the electromagnet core of the retarder rotor are coaxial. The generator unit comprises a generator exciting winding, a generator exciting magnetic pole, a generator armature winding and a generator armature core and is received in the retarder rotor.

A double-salient liquid cooling eddy current retarder with a front-loading gearbox belongs to the field of automobile braking. The double-salient liquid cooling eddy current retarder structurally comprises a clutch magnet yoke, a clutch coil, a clutch disc, a retarder rotor, a retarder stator, a retarder coil and a control module. The retarder is disposed between an engine and the gearbox. Torque is amplified by speed reduction of the gearbox, so that braking effect of the retarder is improved. The retarder rotor is a tooth-shaped rotary disc and connected with a transmission shaft through a support bearing. A permanent magnet is mounted on the inner side of the retarder rotor. The permanent magnet drives the retarder rotor to rotate to allow approximate synchronous rotation of the retarder rotor with an automotive spindle, and accordingly loss during operation of clutch friction plates is reduced. By the permanent magnet, approximate synchronous rotation of the retarder rotor with the automotive spindle is achieved, friction plate loss during braking of the retarder is reduced, a work mode that the clutch is in prior to the retarder is used, and accordingly better braking effects and heat fading compared with traditional eddy current retarders are achieved. In addition, the double-salient liquid cooling eddy current retarder is compact in structure and low in size and weight.