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The Function And Working Principle Of Automobile Three-axis Gearbox

Ningbo Xinhong Hydraulic Co.,Limited | Updated: Aug 16, 2017

                The advantage of the three-axis transmission is that regardless of the transmission specifications, models, volume, weight, shape how changes, its input and output is always on the a axis, so as to facilitate the configuration of the vehicle and the purchase of transmission, but also facilitate the specialized production of transmissions. Therefore, the three-axis transmission is widely used in the rear-wheel-drive car of the front-end engine.

                Three-axis transmission is the power transmission of the forward block using three axes to achieve the transmission, it is characterized by the power of the transmission shaft and the output shaft has a common axis, three axes respectively, the first axis (power transmission axis), the second axis (power output shaft) and the middle shaft, there is a pair of constant meshing gears between the first axis and the middle axis, and the front end of the second shaft is supported by a needle bearing in the bearing hole at the back end of the first shaft, and the first shaft is the follower shaft of the clutch.Gearbox

               1) Air block: When the engine rotates, clutch engagement, first axis rotation, through the active meshing gear drive the middle shaft gear rotation, the two-axis gear is also rotating, but because the two-axis meshing gear is through the bearing sleeve on the two-axis, so, at this time the two-axis does not rotate.Gearbox

               2) One block: The clutch pedal, unloading the engine load, so that the two axis of the two-block junction to move to the right, and two-axis on a constant meshing bevel gear, lift the clutch pedal. At this time, the minimum gear on the middle axis drives the maximum gear rotation on the two axis, so the transmission ratio is the biggest, the output torque is the biggest, the speed of the two axes is the lowest. One or two-axis coaxial rotation.

               3) Two gears: On the basis of the position of the air block, make the two-axis one or two-block junction to move to the left, and two-stop rodent wheel meshing, because the middle shaft gear is larger, the two-axis gear becomes smaller, so the ratio of the two gears is reduced, the output torque is smaller, but the rotational speed is higher and the one or two axis is rotated.Gearbox

               4) Three gears: On the basis of the position of the air block, the two-axis three or four-block junction to move to the right, and the three-stop rodent wheel meshing, due to the middle axle gears become larger, the two-axis gears become smaller, so the transmission ratio of the three gears is reduced, the output torque is smaller, but the rotational speed is higher, and the one or two axis is rotated

               5) Four block: make one shaft and two axis directly connected, so that the power directly from one axis to the two axis, this is the direct block, the transmission ratio is 1, the two axes of rotational speed, torque and the same axis, the same rotation direction.

               6) Five gears: On the basis of the position of the air block, the five-gear joint sleeve on the two axis is moved, with the two-axis five-gear bevel gear meshing, because the two-axis gear is smaller than the gear on the middle axis, so for overspeed, speed limit of less than 1, so the speed of the two axes with one axis, but high speed. Torque is smaller than one-axis moment.Gearbox


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