Large-load self-adaptive automatic speed change system capable of shifting gears easily

Abstract

The invention discloses a large-load self-adaptive automatic speed change system capable of shifting gears easily. The large-load self-adaptive automatic speed change system comprises a power input mechanism, a high-speed gear transmission mechanism, a low-speed gear transmission mechanism, a reverse gear transmission mechanism and a transmission bridge which is used for outputting power. A reverse gear combination sleeve is connected with a reverse gear shaft through a pin roller, so that the reverse gear combination sleeve can rotate by a certain angle relative to the reverse gear shaft andhas a certain degree of freedom, and therefore, the reverse gear combination sleeve is easier to combine with a reverse-gear duplicate gear, gear shifting smoothness is greatly improved, the problemsof clamping stagnation, difficulty in gear shifting, high possibility of being damage and the like during gear shifting are solved, and ultra-large torque can be borne; and improvement is made througha multi-sheet-type friction clutch and a multi-row-type overrunning clutch, so that the self-adaptive automatic speed change system can bear ultra-large load, improve reliability and reduce manufacturing cost.

Description

technical field [0001] The invention relates to the technical field of transmissions, in particular to a large-load self-adaptive automatic transmission system that is easy to shift gears. Background technique [0002] Due to the limitations of its transmission structure, the existing electric vehicles are completely controlled by the driver based on experience when the driving resistance cannot be accurately known during driving. The actual driving conditions do not match, causing the motor to stall. Especially when the vehicle is under low-speed and heavy-load conditions such as starting, climbing, and headwind, the motor often needs to work at low efficiency, low speed, and high torque, which is likely to cause accidental damage to the motor and increase maintenance and replacement costs. It directly affects the cruising range of the battery. For models with high economic requirements such as electric logistics vehicles, the traditional variable speed transmission struc...

AI Technical Summary

Problems solved by technology

[0004] However, due to the spline fit between the reverse gear coupling sleeve and the reverse gear shaft, the reverse gear coupling sleeve can only slide axially relative to the reverse gear shaft, while the reverse gear coupling sleeve The dual gear with the reverse gear is combined through a linear spline or an involute spline under the condition of high-speed rotation, so problems such as sticking, difficulty in gearing, and fragility often occur when entering reverse gear

Moreover, the existing friction clutches are mainly disk-type friction clutches including active friction discs and driven friction discs, which have poor wear resistance. The defect of short life cannot be used as a high-torque power transmission device

The traditional roller overrunning clutch also has a limited ability to bear loads. The only way to increase the load capacity is to increase the size of the outer ring, inner wheel and rolling body. However, the inner wheel and rolling body cannot be infinitely extended, especially the thinnest If the roller is too long, it is not only prone to the problem of uneven force, which may cause breakage, but also difficult to guarantee the machining accuracy, prone to poor meshing, resulting in great difficulty in production and low yield rate. At the same time, the requirements for materials are extremely high. High, high production costs

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