The front wheel hub bearing pressure equipment force analysis and calculation

Wheel hub bearing pressure equipment before 2019 - force analysis and calculation 08 - 18 Wang Qingxin Liu Zhen nwill Xia Chao ( Great Wall motor co. , LTD. Technology center of automotive engineering technology research center of hebei baoding in hebei province 071000). Abstract: a brief analysis to calculate the front wheel hub bearing and steering knuckle pressed the required power installation, software of finite element analysis was carried out on the front wheel hub bearing, steering knuckle when pressed the stress calculation, which provides theoretical support for surplus quantity design. Key words: wheel hub bearing, Steering knuckle; Being connected. Finite element analysis of 1 Outlines the main function of the front wheel hub bearing is bearing and provide precise guidance for wheel drive, front wheel hub bearings and the steering knuckle adopts interference connection method, to balance the frictional force produced by interference fit work bear radial load and axial load, its installation quality harshness (NVH) of vehicles, driving safety, comfort, etc all have important influence. 2 front wheel hub bearing force calculation of aftermarket installation feedback appeared in the process of driving a car chassis in sound, the harshness (NVH) testing to determine the sound source for the former steering knuckle and wheel assembly, the preliminary judgment for front wheel bearings with the steering knuckle channeling, striking the bearing on the circlip ring, the calculation with front wheel steering knuckle bearing fit interference quantity to zero. 051-0. 094 mm, to solve the problem, will cooperate with front wheel steering knuckle bearing with interference quantity adjustment is 0. 081-0. 120 mm, because of the increased amount of interference to force calculation, installation to ensure that the press working is reliable. Front wheel hub bearings and the steering knuckle assembly form is shown in figure 1. Wheel hub bearings and steering knuckle for the cylindrical interference connection, is being connected by a thick wall cylinder theory calculating diagram, as shown in figure 2. Based on the theory of elastic mechanics, front wheel hub bearing and the steering knuckle joint surface under the biggest force formula of Pmax: installation will be available in the above value into the formula, the biggest being connected force P = 39. 88 kn, check production site C increase cylinder press instruction, the press meet the assembly interference to increase after the use requirement. 3 being connected in the front wheel hub bearing, the stress analysis because of the front wheel steering knuckle bearing and the steering knuckle with interference quantity increases, in order to avoid being connected in the process of steering knuckle or bearing failure, need to be pressed bearing and steering knuckle for force analysis, based on the finite element calculation, define the type of unit for Solid185, contact analysis, create the target unit TARGE170, contact element CONTA174, obtained in the greater than surplus quantity to zero. 12 mm, front wheel hub bearing and force of the steering knuckle, the finite element calculation result is shown in figure 3. With figure 3 steering knuckle bearing equivalent stress can be seen that steering knuckle is 108 mpa, the maximum equivalent stress by front wheel hub bearing of 263 mpa, the maximum equivalent stress by steering knuckle material known as QT450, the yield strength of not less than 450 mpa, front wheel hub bearing not less than 900 mpa, yield strength is being connected in the greater than when the surplus is zero. 12 mm, knuckle and front wheel bearings there is no risk of failure. 4 conclusion based on a sound after-sale feedback model as an example, briefly analyzes the increasing interference quantity first wheel hub bearing and steering knuckle when being connected in the required pressure equipment, determine the existing equipment can meet the use requirement, and using finite element analysis software first hub bearings and the process of being connected in the steering knuckle force analysis, make sure that there is no risk of failure in the process of installation, this paper studies across surplus quantity design provides a certain reference significance. References: 1] Lin Ju wide, Huang Gongwei. The installation process analysis of double row circular cone roller bearings [ J] 。 Combination machine tools and automatic processing technology, 2007 ( 1) : 90 - 93. ( 2] Lu Chenggang, shu-hong Chen. Auto transmission key bearing pressure equipment quality control [ J] 。 Mechanical design and manufacturing, 2011 ( 4) : 101 - 103. Source: the small and medium-sized enterprise management and technology in 2016. 4