The wheel loader is under lots of complex conditions, suffered heavy load, and the t fatigue damage often occurred on the work device. Due to the complexity of the digging process, the load of the wheel loader is hard to be tested. As the result, the load for designing structure of the work device is mostly static load, which is far from the actual load. In this paper, a method for testing the external load of the bucket is proposed. The external load can be tested by the simple strain bridge. The experimental results show that the error is within 5% and the angle deviation is within 4°.
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