56results about How to "Improve riveting strength" patented technology

A bicycle drive chain for transferring drive force to at least one chain wheel. The chain includes a plurality of inner and outer chain links connected by pins. Chain rollers surround the pins. The inner and outer link plates have the same outer contour but have different profiles. The outer link plates have a protruding region extending from a concave section and the inner link plate includes deflection chamfers located on an outer surface. The outer link plate further includes chamfers diagonally opposed from each other located at first and second convex sections on an outer surface. The inner link plate has chamfers located on an inner surface that taper off near ends of the inner link plate.

A self-piercing nut has a main threaded cylinder ( 2 ) and a pilot ( 5 ) surrounding a threaded bore ( 3 ). The main cylinder has a lower end continuing to a flange ( 4 ), with the pilot ( 5 ) protruding from a central bottom of the flange so as to pierce a hole in a metal panel ( 11 ). A skirt ( 7 ) depends from the flange's periphery to serves as a seat ( 8 ) contacting the panel. An annular groove ( 9 ) is defined between the pilot ( 5 ) and skirt ( 7 ) such that the pilot is projected beyond the seat ( 8 ). The end face ( 6 ) of pilot has an outer diameter 'B' larger than that 'A' of the lower end of main cylinder ( 2 ). The outer periphery of pilot ( 5 ) is tapered to decrease its diameter inwards and to-wards the nut axis, and a corrugation ( 10 ) is formed in the outer periphery or in the inner periphery of skirt ( 7 ).

Through hole is made along axial of eccenter. There is a ridgy wall part at upper part of the through hole or a notch is setup at center on outer edge of wall part. Inner edge face of the wall part is bent as circular arc face, and two crossed flatten faces are positioned at lower part of the through hole. Axis of rotation of motor is inserted into the through hole of eccenter, and riveting the wall part fixes the eccenter on the motor. Since the said notch is a weak part, when being riveted, the wall part is pressed down to the axis of rotation. When being riveted the wall part will not be chapped since inner edge face is a circular arc face bent along axis of rotation. Wall part of the invented eccenter is not easy to be damaged and riveting intensity is increased.

The invention relates to an inside riveting die of a hydraulic clutch bearing gland. A lower fixing plate is arranged on the upper end face of a bottom plate. A lower die fixing plate is arranged on the upper end face of the lower fixing plate. A split lower die insert is embedded in the middle of the upper end face of the lower die fixing plate. A cylindrical protrusion is arranged in the middle of the upper end face of the split lower die insert. The outer ring of the upper end of the cylindrical protrusion is bent outwards. A locating through hole is formed in the cylindrical protrusion of the split lower die insert. The split lower die insert is evenly divided into multiple fan-shaped columns. The lower portion of each column is transversely provided with a reset spring. A core rod moving up and down is arranged above the locating through hole in the split lower die insert. The lower end of the core rod is of a circular truncated cone columnar structure matched with the locating through hole, wherein the diameter of the lower end of the structure is smaller than that of the upper end of the structure. The inside riveting die of the hydraulic clutch bearing gland has the beneficial effects of being simple in structure, convenient to use, capable of being suitable for hydraulic release bearings of different models, increasing the riveting speed of the bearing glands greatly and meanwhile, improving the riveting strength of the glands and the like.