Mechanical transmission

Abstract

The invention discloses a mechanical transmission. The mechanical transmission comprises a box body and a speed change mechanism located in the box body, wherein the speed change mechanism comprises a driving gear shaft, a driving gear set, a driven gear shaft, a driven gear set and a synchronous gear shifting member, the driving gear set comprises a plurality of driving gears which are arranged according to gear shifts, the driven gear set comprises a plurality of driven gears which are in one-to-one correspondence meshed transmission with the driving gears according to the gear shifts, the synchronous gear shifting member at least comprises gear shifting claws which can be axially driven, and the gear shifting claws are in transmission axial-sliding fit with the driving gear shaft or the driven gear shaft in the circumferential direction and are used for switching the power transmission between the driving gear shaft and all driving gears or between the driven gear shaft and all driven gears. Compared with the prior art, the mechanical transmission disclosed by the invention has the advantages that the axial length of the transmission mechanism and the thickness of transmission gears can be reduced, the structure of a gear shifting control system is simplified, and then, the size and weight of a transmission box are reduced.

Description

technical field [0001] The invention relates to a transmission, in particular to a mechanical transmission. Background technique [0002] The transmission is a gear transmission device that can change the transmission ratio of the output shaft and the input shaft in fixed or step-by-step steps. It is also called a gearbox. It is mainly composed of a transmission mechanism and a speed change mechanism. The synchronizer makes the gears with different transmission ratios mesh to adjust the transmission ratio of the input shaft and the output shaft to realize the step-by-step control of power. Generally, there is also a reverse gear, which realizes the reverse of the output shaft by adjusting the number of meshing gears in the transmission mechanism. To turn, used for reversing or other working equipment reverse operation. Compared with automatic transmissions, mechanical transmissions are cumbersome to operate, but from the perspective of characteristics, the function of mecha...

AI Technical Summary

Problems solved by technology

Compared with automatic transmissions, mechanical transmissions are cumbersome to operate, but from the perspective of characteristics, the function of mechanical transmissions cannot be replaced by other transmissions. Take trucks as an example. Trucks are used for transportation and usually load several tons of goods. Such a high "pressure" requires not only the strong power of the engine, but also the full assistance of the transmission. We all know that the first gear has "power", so that there is enough traction force to drive the car when starting, especially when facing the car. For the climbing section, its characteristics are very obvious. Although the automatic transmission has the characteristics of easy operation, it does not have the above-mentioned characteristics. However, in the prior art, the synchronizer and the driving gear or driven gear of the speed change mechanism are arranged coaxially, and the number generally needs to be more than two according to the gear position of the speed changer. Therefore, the axial size and weight of the speed change mechanism It is relatively large, and multiple shift forks need to be provided, and the structure of the shift control part is complex; at the same time, the synchronizer and the corresponding gear are engaged through the end face, and structures such as engaging teeth or grooves need to be provided on the end face of the synchronizer and the corresponding gear, resulting in the synchronization between the synchronizer and the corresponding gear. The increase in the thickness of the gear further increases the total volume and weight of the transmission mechanism, and takes up a lot of space after being installed in the vehicle, which is not conducive to the structural layout of the vehicle, and also constitutes an important factor for the narrow driving space of the vehicle. Larger engine oil consumption, poor economy, not conducive to energy saving and emission reduction; and for the application of agricultural machinery, such as cultivator, due to the large axial length of the transmission, it will cause the suspension system of the vehicle to be too long. Poor, the installation structure of the suspension system bears a large bending moment and is easily deformed and damaged

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