Intermediate shaft assembly, gearbox, vehicle and assembling method of intermediate shaft assembly

Abstract

The invention provides an intermediate shaft assembly, a gearbox, a vehicle and an intermediate shaft assembly assembling method. The intermediate shaft assembly comprises an intermediate shaft body and at least one first transmission gear. According to the intermediate shaft assembly with the structure, the tooth alignment precision of gears on the same duplicate gear or multi-duplicate gear can be effectively ensured; the total axial length of the duplicate gear or the multi-duplicate gear is larger than that of the single gear, the contact area of the first transmission gear and the intermediate shaft body is increased, the first transmission gear can be effectively prevented from rotating relative to the intermediate shaft body without drilling pin holes and pins, the tooth alignment precision of all gears on the intermediate shaft is guaranteed, and the intermediate shaft assembly is easy to machine and assemble and low in cost. And the processing efficiency of the intermediate shaft assembly can be effectively improved. In addition, after the intermediate shaft assembly is assembled, no pin is arranged between the first transmission gear and the intermediate shaft body, and when the first transmission gear needs to be disassembled, the first transmission gear can be pressed out of the intermediate shaft body through a large-tonnage pressing machine, so that disassembly of the first transmission gear is achieved.

Description

technical field [0001] The invention relates to the technical field of gearboxes, in particular to an assembly method of an intermediate shaft assembly, a gearbox, a vehicle and the intermediate shaft assembly. Background technique [0002] Currently, double countershaft gearboxes are widely used in heavy-duty vehicles due to their large torque and high reliability. According to the gear position requirements of the transmission, the corresponding number of transmission gears is set on the intermediate shaft, and each transmission gear must meet the tooth alignment requirements, that is, the tooth groove centers of each transmission gear must be on a straight line, and the position deviation of the tooth groove centers of each transmission gear Generally cannot exceed 0.1mm. [0003] Existing transmission gears are interference-fitted on the intermediate shaft by means of shrink fit, and the alignment accuracy between the transmission gears is guaranteed by special tooling ...

AI Technical Summary

Problems solved by technology

[0004] After the above-mentioned transmission gear is shrunk on the intermediate shaft and the teeth are aligned, since both are finished products after heat treatment, their hardness is very high, and the pin holes are punched on the intermediate shaft and the transmission gear, and then the pins are threaded and the pin holes are punched. and threading operations are very difficult

[0005] At the same time, if the pin hole has been pre-machined on the intermediate shaft and the transmission gear before the assembly of the intermediate shaft assembly, and the finishing process is carried out after the tooth is completed, the following problems will occur: 1. When the part is processed, the pin hole must be 2. In addition to gear alignment, the position of the pin hole is also required, resulting in more complicated gear alignment tooling; 3. After the gear alignment is completed, it is necessary to ream the pin holes on the gear and the shaft. In this process, the reaming tool passes through two parts, and it is very easy to break the tool

[0006] In addition, because the pin holes must be drilled on the intermediate shaft and the transmission gear, there is an additional drilling process during the processing of the intermediate shaft assembly, and the processing time of the intermediate shaft assembly is long

At the same time, after the intermediate shaft assembly is canceled, it will make it difficult to disassemble the transmission gear in the later stage

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