A heavy-duty vehicle transmission control device

Abstract

A gearbox control device for a heavy-duty vehicle comprises a gearbox gear selecting and shifting shaft and a neutral-gear switch. A gear selecting and shifting block and a guide block sleeve connectedly sleeve the gearbox gear selecting and shifting shaft, and a neutral-gear guide block fixedly connected with the guide block sleeve is matched with a contact of the neutral-gear switch. The gearbox control device further comprises a locking air cylinder valve and a high-gear and low-gear shifting control valve, a lock pin of the locking air cylinder valve is in limited fit with a shifting block locking block on the gear selecting and shifting block, a piston of the high-gear and low-gear shifting control valve is matched with a high-gear and low-gear shifting control guide block on the gear selecting and shifting block, and the shifting block locking block and the high-gear and low-gear shifting control guide block are both fixedly connected with a bushing of the gear selecting and shifting block. The gearbox control device for the heavy-duty vehicle is compact in structure, safe and reliable, interlocking between a main box and a rear auxiliary box can be realized, and false gear engagement can be prevented.

Description

technical field

[0001] The invention relates to a gearbox control device, in particular to a heavy-duty vehicle gearbox control device, which is particularly suitable for realizing the self-locking and interlocking functions between the main box and the rear auxiliary box, and preventing mistakenly shifting to a low-speed gear when driving at high speed. Background technique

[0002] The traditional heavy-duty vehicle gearbox top cover control system can only realize the shift interlock function and the signal feedback function of the idle and reverse gear; it cannot realize the high-speed mistaken low gear function and the self-locking and interlocking between the main box and the rear auxiliary box Features.

[0003] The Chinese patent application publication number is CN102384257A, and the invention patent on March 21, 2012 discloses a kind of heavy-duty gearbox selection and shifting control mechanism. It includes a small cover housing assembly, a shift shaft on which a...

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