4results about How to "Improved seal durability" patented technology

The heavy-load clutch device comprises a shell, an end cover, a guide assembly, a piston and a sealing unit, the end cover and the piston are correspondingly arranged in the shell, the end cover and the piston are connected through the guide assembly, the guide assembly can guide the piston to reciprocate along the axis of the shell, and the sealing unit comprises a check ring assembly. The check ring assembly is arranged between the shell and the piston so as to support the piston and restrain radial deviation of the piston. According to the heavy-load clutch device, a dynamic anti-deflection system is constructed through the guide assembly and the check ring assembly, the guide assembly provides accurate axial movement track constraint for the piston, the piston and the shell are filled with the check ring assembly, radial deflection of the piston under the high-temperature and high-pressure working conditions is effectively restrained, and the service life of the piston is prolonged. The dynamic impact and deflection risks of the sealing assembly are reduced while the linearity and accuracy of piston movement are ensured, so that abrasion of the sealing ring and leakage of hydraulic oil are reduced, the service life of the clutch device in a heavy load environment is prolonged, and the reliability of the clutch device in a heavy load environment is improved.

The invention relates to the field of bicycles, in particular to a hub sealing mechanism and a hub assembly. Comprising a first sealing ring, a first connecting part and a second sealing ring are arranged on a tower footing, a second connecting part is arranged on a hub shell, a sliding plate is arranged on the inner side of the second connecting part in the axial direction of the second sealing ring in a sliding mode, a push plate is arranged on one side of the sliding plate, and a pre-tightening spring is fixedly connected between the push plate and the second connecting part. An elastic skirt edge is arranged between the second connecting part and the sliding plate, the elastic skirt edge, the second connecting part and the sliding plate jointly define an annular air cavity, and a plurality of air inlets are formed in the peripheral side of the second connecting part. Initial pressing force is provided through the pre-tightening spring, when the hub shell rotates, air enters the annular air cavity through the air inlet, the elastic skirt edge expands and abuts against the push plate, the second sealing ring is driven to further press the first sealing ring, and dynamic sealing is achieved in cooperation with protection of the breathable waterproof sleeve.

The application relates to the field of bicycles, in particular to a hub seal mechanism and a hub assembly. The hub seal mechanism comprises a first sealing ring, a first connecting part arranged on a tower base, a second sealing ring, a second connecting part arranged on a hub shell, a sliding plate arranged on the inner side of the second connecting part and sliding along the axial direction of the second sealing ring, a push plate arranged on one side of the sliding plate, a pre-tightening spring fixedly connected between the push plate and the second connecting part, an elastic skirt arranged between the second connecting part and the sliding plate, an annular air cavity formed by the elastic skirt, the second connecting part and the sliding plate, and a plurality of air inlets arranged on the circumferential side of the second connecting part. The initial compression force is provided by the pre-tightening spring, air enters the annular air cavity through the air inlets when the hub shell rotates, the elastic skirt is expanded and presses against the push plate, the second sealing ring is further compressed to compress the first sealing ring, the waterproof and breathable sleeve is protected, and dynamic sealing is realized.