Front and rear drive pneumatic transfer case assembly of wire hanging gearbox

By integrating the design of the wire-coupled gearbox and controlling the pneumatics, the problems of complex structure and power loss in traditional transfer cases are solved, achieving efficient and reliable multi-stage speed change and drive mode switching.

CN224093765UActive Publication Date: 2026-04-07FUJIAN SHANGKUN GEARBOX MFG
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Patent Information

Application Number
CN202521079894.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-05-29
Publication Date
2026-04-07
Estimated Expiration
2035-05-29

AI Technical Summary

Technical Problem

Traditional transfer cases are complex and bulky. When the multi-speed transmission is separated from the front and rear drive control, the power loss is significant, and the switching process is prone to gear impact, which reduces the reliability of the system.

Method used

It adopts a wire-coupled gearbox design, integrating the gearbox body and housing. The intermediate gear, dual-gear and pneumatic drive components are arranged in layers. Multi-level speed change is achieved through gradient gear set and axial linkage. Combined with pneumatic actuation, it controls the switching of high and low gears and the conversion of front and rear drive modes.

Benefits of technology

It significantly reduces the overall size, improves gear meshing accuracy and power transmission efficiency, simplifies the multi-stage transmission structure, reduces machining and assembly difficulty, and enhances power output stability and seamless mode switching.

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Abstract

The utility model discloses a front and rear drive pneumatic transfer case assembly of a wire hanging gearbox. The front and rear drive pneumatic transfer case assembly comprises a gearbox body, a shell, an input shaft main body, an intermediate gear, an intermediate shaft, a first intermediate gear, a second intermediate gear, an intermediate spline shaft, a drive gear, a rear drive output shaft, a front drive output shaft and a front drive separation sleeve. The gradient gear set is arranged in the gearbox body, and multi-stage speed change is achieved through axial linkage of the gradient gear set and the double-gear gears; a high-low gear sliding gear sleeve and a front driving separation sleeve are arranged in the shell, and a pneumatic shifting piece controls switching of driving modes; the input shaft main body adopts a nested structure of a main shaft I and a main shaft II and is combined with a deep groove ball bearing for supporting, so that friction loss is reduced; and the driving gear realizes quick conversion between rear drive and four-wheel drive through the nested output shaft. The multi-speed-change pneumatic drive device is compact in structure, integrates a multi-speed-change function and a pneumatic drive separation function in a limited space, and integrates high efficiency, reliability and environmental adaptability.
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