1. What is the working principle of the gearbox?
The driving speed of the car is controlled by the gearbox, which changes gears by changing gears. Adjust vehicle speed. The gearbox is the main component of the car. Understanding the principle of the gearbox is very useful for driving the car and extending the service life of the gearbox. So what is the principle of the gearbox?
1. Structure of the gearbox
The gearbox consists of an input shaft clutch, an output shaft clutch, an input shaft, an output shaft, a gear, and a locking clutch sleeve. It is composed of a drive shaft, a locking clutch sleeve toggle shaft, a reverse transmission shaft, a locking clutch sleeve return spring and other parts.
2. Gearbox principle
(1) Forward gear stage: The input shaft clutch and the output shaft clutch are both combined, and the first sliding gear of the output shaft meshes with the first sliding gear of the input shaft. On the driving gear, the input shaft drives the front section of the output shaft to rotate, and the front section of the output shaft drives the rear section of the output shaft to rotate. The engine power can be smoothly output to the wheels.
(2) Shifting stage: When the vehicle is in a shifting state, the driver separates the input shaft clutch and the transmission input shaft loses power; the wheels become active parts, and the power will be input to the transmission in reverse. At this time, due to the one-way transmission characteristics of the output shaft clutch, the reverse-driven output shaft clutch is in a disconnected state. At this time, the transmission input shaft and the front section of the transmission output shaft are in a state of losing driving force, and the output shaft sliding gear passes through the shift fork. It achieves meshing with the second driving gear of the input shaft on the input shaft to complete the smooth shifting operation.
(3) Reverse stage: When reversing, the input shaft clutch is separated, the reverse sliding gear meshes with the reverse intermediate gear through the shift fork, and the reverse intermediate gear meshes with the input shaft reverse driving gear. At the same time, the reverse transmission shaft is linked to the locking clutch sleeve toggle shaft, so that the locking clutch sleeve locks the front section of the output shaft and the rear section of the output shaft together through the internal splines of the locking clutch sleeve, thereby realizing the output shaft The rotation of the rear section.
(4) Braking stage: When the vehicle is going downhill and engine braking is required, the driver operates the locking clutch sleeve alone, locks the front section of the output shaft and the rear section of the output shaft, and then engages the first forward gear. , the vehicle has an engine braking function.
2. Are the principles of manual transmission and automatic transmission the same?
Transmissions are divided into two types: manual transmissions and automatic transmissions. Although they are both gearboxes, there are certain differences in principles. The difference between manual and automatic gearboxes is:
1. Manual transmissionBox
Turn the shift lever (shift handle) by hand to change the gear meshing position in the transmission, and combine it with the power output shaft through gear combinations of different sizes to change the torque and torque of the drive wheels. speed to achieve the purpose of speed change.
2. Automatic transmission
There are many kinds of automatic transmissions, and the principles of different transmissions are slightly different. Take the common AT transmission as an example. When the car is driving, the driver controls the accelerator pedal (gas pedal) according to the needs of the driving process. The automatic transmission can automatically shift into different gears according to the engine load and the operating conditions of the car. It can automatically adjust the gear according to the speed of the car and the operating conditions of the car. The engine speed is used to perform automatic gear shifting.
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