Overdrive shifting transmission

Abstract

The invention relates to an overdrive shifting transmission, which comprises an overdrive shaft and a plurality of shifting gear sets, and the transmission further comprises an overdrive shifting mechanism, which comprises a columnar overdrive shifting block capable of extending elastically in a radial direction and being higher than an excircle of the overdrive shaft or retracting and being lowerthan the excircle of the overdrive shaft as well as an elastic member for applying a radial elastic force to the columnar overdrive shifting block; and a shifting block containing groove for containing the columnar overdrive shifting block is arranged on the overdrive shaft; the overdrive shifting transmission provided by the invention adopts the columnar overdrive shifting block capable of extending and meshing in the radial direction or retracting (overdriven) to realize meshing transmission and overdrive; the design structure can cancel a neutral position between the gear positions; the distance and the shifting stroke among the gears are greatly shortened; compared with the current overdrive transmission, the component has long service life, simple structure; the parts are small and easy to obtain, the overall size is small, the space in the transmission is not required, and the layout is compact and easy to manufacture, the service life of the transmission and the safe use of thevehicle are improved; and the manufacturing cost, use and maintenance cost are low.

Description

technical field [0001] The invention relates to a transmission, in particular to an overrunning transmission. Background technique [0002] The transmission is a mechanism used to change the speed and torque from the engine. By changing the transmission ratio of the output shaft and the input shaft through fixed or step-by-step changes, it can coordinate the speed of the engine and the actual driving speed of the wheels to exert the best performance of the engine. [0003] Traditional gear shifting generally uses the movement of the shift fork and the shift fork shaft to drive a certain gear gear to engage the transmission, and the rest of the gears are out of mesh or overrun (low gear) or idling. In the traditional gear shifting structure, when entering from one gear to another, a neutral gear must be set in the middle; for example, when the first gear enters the second gear, the neutral gear must be passed through in the middle, and the gear shifting process is first gear,...

AI Technical Summary

Problems solved by technology

In the traditional gear shifting structure, when entering from one gear to another, a neutral gear must be set in the middle; for example, when the first gear enters the second gear, the neutral gear must be passed through in the middle, and the gear shifting process is first gear, neutral gear, second gear. The reason is: the first gear must completely cut off the power before entering the second gear, otherwise, if the first and second gears transmit power at the same time, the gears will be damaged due to the lack of speed of the gears; If the neutral gear is set between the positions, the distance between the gears will be increased, and the shift stroke will be increased.

[0004] At this time, the low-speed overrunning form can solve the above problems due to its compact structure; however, it needs to use an overrunning clutch. The traditional overrunning clutch (including wedge type or ratchet pawl structure) has many parts and a relatively complicated structure. The radial size is larger and the price is higher. The main reason is that the internal parts are follow-up, which is easy to cause damage to the rolling elements or the inner and outer ring raceways, and the service life is short, which not only increases the manufacturing cost of the transmission, but also increases the use. and maintenance costs

Images