Electronic wheel balancer for vehicle wheels

专利名称：Electronic wheel balancer for vehicle wheels发明人：John F. Wood申请号：US06/406873申请日：19820810公开号：US04480472A公开日：19841106

摘要：A dynamic electric wheel balancer for measuring the imbalance condition in avehicle wheel and indicating the position and correction weights required for balancingthe wheel in one or two planes. The wheel balancer contains a rotating shaft in order tomake the dynamic measurements. The shaft is free wheeling during measurement and isbrought up to a predetermined minimum r.p.m. value through a motor and clutcharrangement. After measurements have been made, a solenoid actuated brake, whichtakes advantage of the force factors associated with a flywheel forming part of the mainshaft, brings the rotating shaft to a halt. Prior to taking the measurements, the wheelbalancer is calibrated by employing a known weight located at a known position on a faceplate forming part of the main shaft. In order to take the measurements, piezoelectricsensors are used to measure the vertical force components exhibited by the imbalancecondition of the vehicle wheel secured to the rotating main shaft. The balancer finds thedefinite integral of each of the forces generated by the piezoelectric transducers anduses the cross correlation data generated by these integrations to find the zero crossingpoints and the peak determinations. The data is processed and displayed in an eyereadable format to tell an operator where to place a weight and how much the weightshould be in order to correct the imbalance condition in the wheel.

申请人：HOFMANN CORPORATION AUTOMOTIVE SERVICE EQUIPMENT

代理机构：Fleit, Jacobson, Cohn & Price

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