Fatigue durability test method for gear selection and shift mechanism of transmission

Abstract

The present invention discloses a transmission shifting mechanism fatigue endurance test method. The method comprises the following steps: the transmission shifting mechanism is fixed according to the actual vehicle installation location mode; the load being the same as the actual vehicle is applied on the shifting finger of the shifting mechanism to drive the shifting arm of the shifting mechanism to complete the shifting operation and detect the turning angle of the shifting finger of the shifting mechanism at present, if the turning angle is in the range of the qualified turning angle when the shifting of the shifting mechanism is performed, the shifting is successful to accumulate one time to the total shifting number of the times and return the shifting finger of the shifting mechanism back to the neutral gear position, and the operation steps mentioned above are repeated until the total shifting number of times reaches a regular test number of times or beyond the range of the e qualified turning angle when the shifting of the shifting mechanism is performed. The operation is simple, the test result is objective and reliable, the simulation precision is high, and the universality is high.

Description

technical field [0001] The invention relates to the technical field of auto parts testing, in particular to a fatigue durability test method for a gear selection mechanism in a transmission, in particular to a fatigue durability test method for a gear selection mechanism of a transmission. Background technique [0002] The gear selection mechanism of the transmission is an important part of the automobile transmission. It is one of the most important parts inside the transmission. The gear selection of the gear shifter transmits the force and torque to the gear selection mechanism through the flexible shaft. The characteristic of its own mechanism reflects the force and torque transmitted by the shift flexible shaft to the shift finger, and the shift finger rotates and moves to transmit the torque to the shift shaft, which drives the shift fork and then acts on the synchronizer. Due to the frequent switching of gears in a timely manner during the driving of the car, if the g...

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Problems solved by technology

[0003] The existing design and trial production process and no fatigue durability test for the finished product, so the fatigue durability results of the transmission selection and shifting mechanism can only be obtained from the actual vehicle, but the corresponding data cannot be obtained, because the shift finger is welded on the shift shaft Yes, during the shifting process, the shifting finger needs to drive the shift fork to push the synchronizer to complete the shifting operation, which will bear a large load, so it is easy to have defects such as a decrease in the structural bearing capacity, and only rely on experience to improve parameter design and structure This method is relatively objective, and it is impossible to evaluate the fatigue durability of the transmission selection and shift mechanism qualitatively and quantitatively.

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