Method for applying single-intermediate-shaft speed changer structure to double-intermediate-shaft speed changer structure

Abstract

The invention relates to a method for applying a single-intermediate-shaft speed changer structure to a double-intermediate-shaft speed changer structure, which comprises steps as follows: all output shaft gears float on all output shaft gear splined hubs through spline clearances; combination teeth of all the output shaft gears are fixed to all the output shaft gear splined hubs; the combination teeth of the output shaft gears and the output shaft gear splined hubs are in a split structure or integral structure; the combination teeth of the output shaft gears are centered to the output shaft through needle bearings by utilizing the output shaft splined hubs; a constant mesh gear floats on the input shaft through the spline clearance; and mesh teeth of the constant mesh gear is centered on the input shaft. The output shaft gears, output shaft gear splined hubs and gear-shift mesh teeth adopt a split structure design, thereby ensuring the radial location between the gear-shift mesh teeth and the shaft on the premise of ensuring the radial float of the output shaft gears; and the single-intermediate-shaft speed changer structure is utilized to solve the problems of balanced load of double intermediate shafts and concentricity between the left and right sides of the synchronizer.

Description

technical field [0001] The invention belongs to the technical field of automobile gearboxes, and relates to a method for applying a single countershaft transmission structure suitable for a heavy-duty automobile gearbox to a double countershaft transmission structure. Background technique [0002] At present, two technologies are commonly used in medium and heavy-duty vehicle gearboxes, namely the ZF technology of single intermediate shaft and the EATON technology of double intermediate shafts. Each has its advantages and disadvantages in use. For example, Qijiang ZF single intermediate shaft gearbox has a good performance in passenger cars. The advantage of shifting performance is the disadvantage of poor load-carrying capacity; Fast EATON double countershaft gearbox has the advantage of strong load-carrying capacity for heavy trucks, but its disadvantage is serious synchronizer failure. [0003] The gearboxes of heavy-duty vehicles often use double intermediate shafts to c...

AI Technical Summary

Problems solved by technology

[0003]The transmission of heavy-duty vehicles often adopts double intermediate shafts for transmission, and adopts gear radial floating mode for transmission, so as to achieve simplification in size and quality, while ensuring output power and transmission However, due to the gear floating, the left and right sides of the synchronizer are not concentric, so that the wear of the synchronizer of the heavy-duty vehicle gearbox is serious, and the replacement and maintenance are frequent, which brings great inconvenience to the user.

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