hub in a barrel-shaped profile of the tire of the tire support, the metal member mounted on the center shaft. Also known as wheels, rims, wheels, tires bell. The hub diameter, width, molding methods, a wide variety of different materials.
1. The hub hub development
car wheel bearings are used in pairs in the past most of single row tapered roller or ball bearings. With the development of technology, cars have been widely used car hub units. The amount of use of a hub and bearing unit of growing, to the third generation have been developed: the first generation is a double row angular contact bearing components. The second generation of the outer raceway having a flange for fixing the bearing, the bearing sleeve can simply be fixed to the shaft by a nut. Making vehicle maintenance becomes easy. Third generation hub bearing unit is a bearing unit and using the anti-lock brake system cooperates. The hub unit is designed to have an outer flange and inner flange, the flange is bolted to the drive shaft, the entire bearing outer flange fit together.
2. The hub wheel type
hub called rim. Depending on the characteristics and needs of the vehicle, the hub surface treatment process will take a different approach, it can be divided into two kinds of painting and plating. Common models hub appearance considered less good heat dissipation is a fundamental requirement, the use of basic paint handling process, i.e. by spraying and then roasted, the cost is relatively economical and beautiful colors, long hold time, even when the vehicle is scrapped , color wheel remains unchanged. Many popular models hub surface treatment processes are paint. Some stylish, vibrant use of color wheels also paint technology. Such wheels affordable, complete specifications. Chrome wheels divided silver plating, electroplating, and pure water and other types of plating. Silver plated and chrome wheels although the water bright color vivid, but kept short time, so the price is relatively cheap, as many young people like the pursuit of novelty, market prices between 300 yuan -500. Pure chrome wheels, color retention time is long, can be said to upscale. Luxury cars multiple use of pure chrome wheels, the price is about 800-900 yuan.
3. The hub manufacturing methods
A method for producing
aluminum wheels in three ways: gravity casting, forging, precision casting low pressure. 1. The gravity casting by gravity casting molten aluminum alloy into the mold, after molding by grinding lathe processing, to complete the production. The manufacturing process is relatively simple, without the precision casting process, high production efficiency and low cost, but prone to bubbles (blisters), density non-uniformity, surface smoothness is not enough. There are quite a Geely models equipped with this method is the production of wheels, mainly early production models, the new models are already changing with the new wheel hub. 2. The forging press of thousands of tons of monolithic ingots extruded directly on the mold, the advantage of uniform density, the surface smooth and soft, thin and light weight hub wall, the highest material strength, and high ratio of above casting method, but due require more sophisticated production equipment, and the yield is only five to Liucheng, higher manufacturing costs. 3. 0.1Mpa low pressure casting, the casting moldability this manner a good, clean cut, uniform density, smooth surface, can achieve high strength, light weight, and can control costs, and yield low-pressure casting method in more than 90% is a main method for producing high quality aluminum hub. .
a hub wheel frame 4
1, the rim: in conjunction with a tire assembly, a wheel supporting portion of the tire. 2, the spokes: the hub axle mount connector embodiment, the support portion of the wheel rim. 3, offset: the rim center plane to the distance between the surface of the spoke mounting. A positive offset, zero offset, offset the negative points. 4, the rim: holding and supporting direction of the tire rim portion. 5, bead seat: andHe said mounting surface in contact with the bead, to maintain the support rim portion in the tire radial direction. 6, bottom: For the convenience of assembly and disassembly of the tire, leaving the pit depth and width of the rim. 7, the valve hole: hole mounting tire valve.