Support structure of reverse counter shaft of transmission

Abstract

The invention provides a support structure of a reverse counter shaft of a transmission. The support structure comprises a transmission housing, a partition and a boss. The transmission housing, the partition and the boss are integrated. Reverse idle gear mounting space is reserved between one side of a transmission main box, close to the partition, and the boss. The partition is provided with a second reverse counter shaft support hole and an auxiliary box counter shaft support hole, which are nonconcentric. One side of the boss, close to the transmission housing, is supported on the transmission housing through a plurality of ribs. Radial plates are disposed among the ribs. The reverse counter shaft boss is supported by the ribs in the support structure, and the reverse counter shaft boss with specific features is cast to reach a rear auxiliary box partition. By milling the reverse idle gear space with a disc milling cutter along with machining, casting of windows on two sides of the box is avoided effectively while fine casting manufacturability is guaranteed, casting manufacturability of the casing is improved, the parts such as window cover plates, spacers and bolts are omitted, and oil leakage spots are reduced effectively.

Description

【Technical field】 [0001] The invention relates to the technical field of automobile transmissions, in particular to a support structure for a reverse intermediate shaft of a transmission. 【Background technique】 [0002] There are various forms of heavy-duty vehicle transmissions, and the multi-gear heavy-duty vehicle transmissions are mostly based on the combined structure of the main and auxiliary boxes. The double countershaft structure of the main and auxiliary boxes is a typical structure in the field of heavy-duty vehicle transmissions. In this structure, on the section of the partition wall of the rear auxiliary box, the rear support hole of the reverse intermediate shaft of the main box is in the front bearing area of ​​the auxiliary box intermediate shaft, resulting in the suspension of the rear support of the reverse intermediate shaft, and the reverse intermediate shaft is mostly cantilevered. The form is locked on the boss of the reverse gear countershaft in the c...

AI Technical Summary

Problems solved by technology

Since the space where the reverse countershaft gear is located forms an undercut inside the case, in order to ensure the feasibility of casting, windows are usually opened on the side of the case where the reverse countershaft gear is located, but opening windows on both sides of the case has a great impact on the strength of the transmission case, Significant reduction in stiffness, complex processing, increased oil leakage failure points, and affects the appearance of the transmission at the same time

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