(1) shoulder: simple structure, reliable positioning, and can bear large axial force.
(2) Round nut: reliable fixation, convenient disassembly and assembly, and can bear large axial force.
(3) Shaft end retaining ring: it is suitable for fixing shaft end parts and can bear certain vibration and impact load.
(4) Elastic retaining ring: simple and compact structure, unable to bear large axial force, often used to fix rolling bearings.
(5) Sleeve: simple structure, reliable positioning, no need to slot, drill and cut threads on the shaft, thus not affecting the fatigue strength of the shaft.
Circumferential fixing method: usually, the parts on the shaft are fixed in the circumferential direction through the connection of keys and splines. Their respective characteristics are as follows:
Ping Jian (1): simple structure, convenient disassembly, good neutrality and wide application.
(2) Semi-circular key: Because the semi-circular key is loosely matched with the keyway, it can be tilted and easy to disassemble. It is usually used at the end of a tapered shaft to transmit a small torque.
(3) Wedge key: Because there is eccentricity between the shaft and the parts on the shaft after wedging, it is often used in low-speed occasions with low neutral requirements and stable load.
(4) Tangential keys: When transmitting bidirectional torque, two pairs of tangential keys are used and arranged at an angle of120. They are mostly used in situations where overloading and alignment are not strict. Because the keyway greatly weakens the strength of the shaft, it is usually used on the shaft with a diameter greater than100 mm.
(5) Spline: it is suitable for dynamic-static connection with large load transfer and high centering accuracy, especially for dynamic connection with constant slip, and has been widely used in mechanical transmission of airplanes, automobiles, tractors, machine tools, agricultural machinery and so on.
Extended data:
An axial bearing for a spinning rotor of a open-end spinning device and installed in a supporting gap of a disk supporting device without axial thrust has a static bearing part, a dynamic bearing part and a protective device, wherein the static bearing part has at least two permanent magnet rings polarized in the axial direction, and these permanent magnet rings are defined by polar plates on both sides, and are arranged in a bearing housing in such a way that polarities (N/N or S/S) in the same direction are opposite to each other in an installed state.
The dynamic bearing assembly is composed of ferromagnetic connectors arranged on the rotor rod of the spinning rotor with pole piece spacing; The protective device prevents the two bearing parts from contacting each other. According to the present invention, each pole piece is arranged to have a clearance cross section, and the size of the clearance cross section in the vertically arranged axial region of the pole piece in the installed state is larger than that in the vertically arranged axial region.
References:
Baidu encyclopedia-axis