Two axis of the manual gearbox structure and use

At present the saloon car on the second shaft is widely used manual gearbox, its structure and three shaft transmission basic similar, but its input shaft and intermediate bearing integration for a shaft, so the structure is simple, the advantages of small size, in addition, it contains middle gear of high transmission efficiency, and low noise and other characteristics, so the more suitable for the average lead precursor home car, is currently the most widely used car transmission form, its defect is cannot set directly to block, and gear transmission ratio can't design is too high. And in the drive, use more is still traditional triaxial type transmission.The general manual gearbox of gears are in the state of the meshing often, these often meshing state of gears are divided into helical and straight tooth two, two teeth visual comparison, helical gear on the structure, natural advantage, tilting the layout of the tooth shape can improve both gear meshing of coincidence degree, make smooth transmission gears, reduce the noise, and can improve the tooth root bending strength, the tooth contact strength, so as to improve the service life of gear. By contrast, straight teeth gear and not good for nothing, the transmission efficiency high characteristic, can make vehicles more powerful round for the power, so in the car gearbox field wide application.The general manual gearbox, is all through the push-rod link or barrows is to control the shift. Push rod connected shift control way, more direct but the vibration of the relay will be of great; And although no vibration of barrows type, but is not very clear range, it is each to have quality. In addition to the two kinds of pure mechanical shift control and, in addition, there are using the electric control device of shift manual gearbox, it can be very good with push rod and shift the advantages of online between. This shift in the gearbox, turn the shift lever block to the corresponding block, in the transmission will have motor driver corresponding fork control sleeve and gear bite.The shift to the synchronizer gearboxes for, shift smoothly or not, to a great degree need to depend on synchronizer quality. Synchronizer actually spoken parts in an opera is in combination with set and gear on the layout of the friction piece, and general friction piece of different is, it's the friction surface is the cone. This group of friction is the role of the disc in straight teeth and put teeth in contact before, to advance the friction, to speed the side of the big energy transfer to speed the smaller one party, make car cameras speed of smaller party improve speed, to one side of the larger and rev synchronous speed. This can not only ensure normal shift, still can have buffer role, and cone of friction material is the number of the group with a direct influence on the performance of synchronization of the pros and cons. And the public classic MQ200 manual gearbox of synchronizer have three groups of friction surface, it also made this a gearbox excellent into block feel.By understanding the manual gearbox after the general structure, we will see what it has advantages and disadvantages. Advantages are car DVD obvious, it simple structure, reliable performance, manufacturing and maintenance costs are low, and the high transmission efficiency (in theory will be more fuel-efficient), in addition, because is purely mechanical control, shift react fast, and can be more direct expression of the will of the drivers, so also more rich driving enjoyment, these are manual gearbox advantages. But compared with automatic transmission, it operation detailed, and in the stall when switching gears distinct disadvantages is irreparable.