Transmission protection system

Abstract

The invention discloses a transmission protection system. The transmission protection system comprises a first motorized valve, a gear locking piston, a transverse shift level, a shift rail and a combined air cylinder. The first motorized valve is controlled by the shift rail of the combined air cylinder of an auxiliary box; when the auxiliary box is just in a high gear or low gear, an opening A of the first motorized valve is communicated with an opening T of the first motorized valve, the first motorized valve exhausts air, the gear locking piston does not have an air pressure effect, and the transverse shift level can engage a gear by rotating; when the auxiliary box is not properly in a high gear or low gear, an opening P of the first motorized valve is communicated with the opening A of the first motorized valve, the first motorized valve takes in air, and the gear locking piston locks the transverse shift level under the air pressure effect so that the transverse shift level can not engage a gear by rotating. Because the transverse shift level is prevented from rotating by the gear locking piston so as to prevent two non-standard gear shifting operations, the service life of a transmission can be effectively prolonged.

Description

【Technical field】 [0001] The invention relates to the technical field of transmissions, in particular to a transmission protection system. 【Background technique】 [0002] The failure of the rear auxiliary box synchronizer of a heavy-duty vehicle transmission is a relatively common failure form, and irregular operation of the rear auxiliary box synchronizer may easily lead to abnormal damage to the auxiliary box synchronizer. The most common irregular operations are as follows: the auxiliary box synchronizer is not switched in place (The high and low gears are not in place), the main box starts to shift gears, resulting in a sharp increase in the synchronous inertia, resulting in damage to the synchronizer teeth; the auxiliary box synchronizer is in high gear, and the low gear is switched under the condition of high vehicle speed, resulting in too long synchronization time , causing the synchronizer to wear out too quickly and fail. In order to effectively protect the synchr...

AI Technical Summary

Problems solved by technology

[0002] The failure of the rear auxiliary box synchronizer of a heavy-duty vehicle transmission is a relatively common failure form, and irregular operation of the rear auxiliary box synchronizer may easily lead to abnormal damage to the auxiliary box synchronizer. The most common irregular operations are as follows: the auxiliary box synchronizer is not switched in place (The high and low gears are not in place), the main box starts to shift gears, resulting in a sharp increase in the synchronous inertia, resulting in damage to the synchronizer teeth; the auxiliary box synchronizer is in high gear, and the low gear is switched under the condition of high vehicle speed, resulting in too long synchronization time , causing the synchronizer to wear out too quickly and fail

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