Gear shifting and sliding mechanism for carbon-free cart for traveling up and down hill

Abstract

The invention discloses a gear shifting and sliding mechanism for a carbon-free cart for traveling up and down a hill. The gear shifting and sliding mechanism comprises a power transmission module and an electronic control module. The power transmission module comprises a rear driving wheel half axle, a rear driven wheel half axle and a winding shaft provided with a cone axle sleeve. The rear driving wheel half axle is connected with an inside and outside spline sleeve capable of axially moving through a spline, and the sleeve is connected with the winding shaft through two pairs of constant mesh gears. The electronic control module comprises a single chip microcomputer, an infrared tube, a wheel speed sensor and two direct current type electromagnets capable of making the constant mesh gears shift gears. When the carbon-free cart travels up and down the hill, the single chip microcomputer sends different instructions according to electrical signals sent by the infrared tube and the grating wheel speed sensor to control the different direct current type electromagnets to be powered on or powered off, so that a power transmission line is converted between the two pairs of constant mesh gears to finish gear conversion between a level road and a ramp. The gear shifting and sliding mechanism has the advantages of being capable of performing intelligent detection, accurately changing driving force, saving gravitational potential energy and making the cart have a uniform traveling speed and the like.

Description

technical field [0001] The invention relates to a carbon-free trolley, in particular to a shifting and sliding mechanism for an uphill and downhill carbon-free trolley. Background technique [0002] Designing and producing carbon-free cars has gradually become a regional and even national mechanical design competition. Such as figure 1 As shown, the carbon-free car is a self-propelled car with direction control function driven by gravitational potential energy; A competition field with obstacles at different distances; the energy driving the car to walk and turn can only be converted from the given gravitational potential energy, and other energy sources cannot be used. Given a gravitational potential energy of 4 joules (take g = 10m / s 2 ), the weights with a mass of 1kg (Φ50*65mm, ordinary carbon steel) are uniformly lowered to obtain them during the competition, and the drop is 400mm. fall. [0003] Most of the existing carbon-free trolleys are wound on the tapered sh...

AI Technical Summary

Problems solved by technology

This method is relatively mechanical. It is necessary to measure the starting point of the track and the position of the ramp in advance, and then to wind the line. The human error is relatively large; and the error of the winding position is too large. It has not been changed, the phenomenon that the trolley stops on the ramp; and during the whole process of going up and down, the weight is falling, which increases the loss of energy; finally, if the winding position is uneven, the center of gravity of the trolley will be uneven during driving. Stability, reduce the movement accuracy of the trolley

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