What is a hub connecting? The shaft hub connection type

An overview, hub connecting shaft and the shaft parts ( Such as gears, pulleys, sprockets, etc. ) Link called hub connection, its function main shaft parts of circumferential fixation and transfer torque. Hub connecting many ways, the most common, the most widely used are key links, spline connection, pin link, interference connection, etc. Second, the shaft hub connection utility transmission torque; Fixed and positioning. Three, the classification of shaft hub connecting 1, the key link shown above is a pulley and shaft key connection. Is the purpose of the key connection shaft parts of circumferential fixation and transfer torque. Flat key connection strengths: ordinary flat key connection has the advantages of simple structure, convenient installation, due to the assembly at the same time with the top of the key of the gaps between the wheel hub keyway, does not affect the hub on the shaft of the better reason to neutral, thus widely used. But it can only to transfer torque, circumferential fixation cannot transmit axial force and axial fixation. 1) Flat key connection a, the working principle of flat key links: key lateral extrusion, key shear transfer torque, flat key type b: type a flat key, type b flat key, C type flat key. 2) Woodruff key connection structure is a shaft keyway is the same size with the radius and the key outside the disc cutter machining. （ b） Advantages: is the mind and good manufacturability, convenient assembly, especially applies to conical axle and wheel hub connection, as shown in figure ( b) Shown below. Disadvantages: shaft keyway is deep, on the strength of the shaft weaken is bigger, so only commonly used in light load static connection. 3) Wedge key connection strengths: be in hub have the effect of unilateral axial fixed or bear one-way axial load. Weakness: the damage to the chocking is the shaft and the wheel hub to neutral. 4) Tangential key connection tangential key advantages: load. Disadvantages: tangential keys destruction to the neutral axis parts. In the application of tangential keys: for accuracy is not high, big load of heavy machinery, such as: large flywheel, mine hoist drum etc. Working principle: (2, spline connection Spline shaft, spline) The key, pressure from the side work. And characteristics: a, high bearing capacity Gear power transmission; B, the shaft and the hub weaken small - Tooth groove shallow; C, good to neutral, high cost, Special equipment for processing) 。 3, pin connecting main purpose - — The relative position is fixed between the two parts. 4, interference connection interference connection utilizing the interference fit between the parts is to achieve the connection. The connection of simple structure, good centering precision, can withstand the torque, axial force or both composite load, and high bearing capacity, under the impact of vibration load can be more reliable; Defect is combined with the surface machining accuracy is higher, assembly, although no keyway connect parts, but the mating surface edge stress concentration is larger. Interference connection is mainly used in heavy machinery, lifting machinery, ships, locomotive and general machinery, and multi-purpose medium and large size. Working principle: can the interference fit joint load, the reason is that parts with elastic and connecting with the assembly interference. After the assembly tolerance and contained a radial deformation between mating surface produces a lot of pressure, suffers from the co-existence of working load is against friction. Can be used when the fitting surface is a cylinder, pressure or temperature difference method ( Heat tolerance or cooling contained parts) Assembly. When other things being equal, with temperature difference method can obtain higher friction force or torque, because it's not a scratch with surface like pressure into laws. Adopting what kind of method of assembling by factory equipment conditions, the interference amount, the structure of the parts and the size, etc.