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Introduction To Gearbox And Commonly Used Terms

Ningbo Xinhong Hydraulic Co.,Limited | Updated: Jun 13, 2017

   The transmission is used to change the speed and torque from the engine mechanism, it can be fixed or sub-file to change the output shaft and input shaft transmission ratio, also known as gearbox. Transmission by the variable speed transmission mechanism and control mechanism, and some cars have power output mechanism. Most of the transmission mechanism with ordinary gear drive, and some with the planetary gear drive. Ordinary gear transmission gears generally use slip gears and synchronizers.

     Basic terminology for transmissions Terms and phrases:

(1) drive gear, driven gear. The input shaft is understood to be connected to the clutch and rotated under the engine, and the gears fixed to the input shaft are rotated synchronously with the gears, which are then forced to rotate as the master gear is connected to the output shaft The gear is called a driven gear.

(2) transmission ratio i. The ratio of the number of teeth of the driven gear to the number of teeth of the driving gear is defined as the gear ratio.Gearbox

When the relationship between the number of teeth of the driven gear and the number of teeth of the drive gear changes, the transmission ratio i changes, the engine speed does not change the conditions, will affect the output shaft speed change, that is, wheel speed change. A pair of meshing gears, the use of the number of teeth will not change, so its transmission ratio is fixed. If a number of gears with different number of teeth on the input shaft and the corresponding number of teeth on the output shaft are also engaged, a set of transmission gears of different transmission ratios i can be obtained. Automotive transmission is in accordance with this basic principle to achieve shift speed.Gearbox

(3) forward gear, can make the car forward gear. Reverse gear, can make the car back to the stalls. Neutral gears are not in the working position of the gears, and the engine power input to the input shaft is no longer transmitted to the output shaft.Gearbox

(4) direct file. The engine power does not pass through any gears in the transmission, but is called a direct file output via the transmission input shaft and the output shaft directly connected to it as a direct output. Direct gear ratio is 1.

(5) overdrive. That is, the output shaft speed is higher than the input shaft speed gear.

(6) the number of files. Refers to the number of stalls with stepped gear transmissions. Commonly used gearbox number of four to five files, and the third gear has been rare. The more the gears, the better the adaptability of the vehicle to the driving conditions, the lower the fuel consumption, but the more complex the transmission mechanism and the steering mechanism, making the operation difficult and costly.

(7) low-grade, high-grade. In the gearshift stalls, the small number of stalls called low, the smaller the number of stalls, the greater the transmission ratio, the greater the traction, and the lower the speed. Such as a gear transmission than in the forward gear in the largest, the lowest speed, the largest traction. Digital large stalls that high-grade, the greater the number, the smaller the transmission ratio, traction is also smaller, but the higher the speed.

(8) shift. The transmission process of the transmission to complete the transmission ratio is called shift. The gearshift is a gearbox that is engaged with the gear and is engaged with or engaged with the engaging ring on the tooth side (or separately) to achieve the gear ratio change. Synchronizer shift, using the synchronizer shift. There is no impact and noise on the gears and the gearshift time is also short.

(9) Jumping. During the driving of the vehicle due to wear and vibration of the joint teeth and other reasons, resulting in the clutch and the joint ring gear leaving the transmission in a neutral state.Gearbox

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