Transmission high reverse lock system

Abstract

The invention provides a transmission high reverse lock system which is characterized in that an auxiliary box is not out of gear during pre-selection and the high reverse lock is unlikely to fail when a main box is put into a gear. The transmission high reverse lock system comprises a single H handle valve, a pre-exhaust gas circuit control valve, a main box transverse gear shifting rod, a one-way valve, a single H valve, an auxiliary box cylinder, a high reverse lock and a first-gear reverse shifting fork; the gas inlet of the single H handle valve and the gas inlet of the pre-exhaust gas circuit control valve are connected to the total gas inlet end of the system; the gas transmission opening of the single H handle valve is connected with the control end of the single H valve; the gas transmission opening of the pre-exhaust gas circuit control valve is connected with the gas inlet of the one-way valve; the gas transmission opening of the one-way valve is connected with the gas inlet of the single H valve; the first gas transmission opening of the single H valve is connected with a rod low-gear region in the auxiliary box cylinder, while the second gas transmission opening of the single H valve is connected with a high gear region of the auxiliary box cylinder and also connected with the high reverse lock simultaneously; when the main box is put into a gear, the main box transverse gear shifting rod is in transmission connection with the control end of the pre-exhaust gas circuit control valve; when gas in fed into the high reverse lock, the high reverse lock is connected and locked with the first-gear reverse shifting fork.

Description

Technical field [0001] The invention relates to the field of transmission gear locking, in particular to a transmission high-end reverse lock system. Background technique [0002] The transmission with a single H control structure and a rear auxiliary case must ensure that the reverse gear cannot participate in the transmission when the rear auxiliary case of the transmission is engaged in a high gear, so as to avoid accidents caused by the wrong reverse gear during the forward process of the vehicle. In order to solve this problem, a high-reverse gear lock mechanism is added above the first-gear reverse shift fork. When the auxiliary box is hooked into the high-end zone, the high-reverse gear lock works to lock the first-gear reverse shift fork and prohibit the shift fork. The sport is in first gear and reverse gear. [0003] Currently, the operation of the transmission with auxiliary box requires pre-selection, that is, the single H handle valve is first turned to allow the sing...

AI Technical Summary

Problems solved by technology

[0004] The use of an air control valve with pre-exhaust can solve the problem of pre-selection and disengagement, but it brings another problem, that is, once the main box is in gear, the air control valve exhausts, resulting in high and low gears after the single H valve The side air is completely emptied, causing the high reverse gear lock to fail

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