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1. What are the three types of synchronizers: Synchronizers are of atmospheric type, inertial type and self-energizing type. 2. Function: When the adjacent gears are converted to each other, the principle that different operation steps should be taken is also applicable to the shifting of moving gears, but the rotational angular speed requirements of the ring gear to be engaged and the engagement sleeve of the former are the same, while that of the latter to be engaged The linear speed requirements of the gear meshing point are the same, but the speed analysis principle is the same. The shifting operation of the transmission, especially the shifting operation from a high gear to a low gear, is complicated, and it is easy to produce the impact between the gear teeth or the spline teeth. In order to simplify operation and avoid inter-tooth impact, a synchronizer can be provided in the gear shifter. The inertial synchronizer is synchronized by friction, and a special mechanism is provided on it to ensure that the engaging sleeve and the spline gear ring to be engaged cannot be in contact before synchronization is achieved, thereby avoiding inter-tooth impact.

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The working principle is as follows: 1. (1) The input shaft and output shaft of the transmission rotate at different speeds. When changing gears, the two gears rotate at different speeds. The gears collide with each other, thus damaging the gears. (2) The shift of the old transmission should adopt the "two-foot clutch" method. When shifting, first step on the clutch, pull the gear out to neutral, release the clutch, stay in the neutral position for a while, and then step on the clutch again. , put the block into another block.

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The working principle is as follows: 1. (1) The input shaft and output shaft of the transmission rotate at different speeds. When changing gears, the two gears rotate at different speeds. The gears collide with each other, thus damaging the gears. (2) The shift of the old transmission should adopt the "two-foot clutch" method. When shifting, first step on the clutch, pull the gear out to neutral, release the clutch, stay in the neutral position for a while, and then step on the clutch again. , put the block into another block. (3) But this operation is more complicated and troublesome. Therefore, modern gearboxes are designed with "synchronizers", through which the gears to be engaged can reach a consistent speed and smoothly engage and shift. 2. The synchronizer has a constant pressure type and an inertia type. At present, all synchronous transmissions use inertial synchronizers, which are characterized by relying on friction to achieve synchronization. 3. There are chamfers (locking angles) on the engaging sleeve, the synchronizing ring and the ring gear of the gear to be engaged. The inner conical surface of the synchronizing ring is in contact with the outer conical surface of the gear ring gear to be engaged to generate friction. The friction of the conical surface makes the gear sleeve and the ring gear to be meshed quickly synchronize, and at the same time, it will produce a locking effect to prevent the gears from meshing before synchronization. 4. When the inner conical surface of the synchronizing ring contacts the outer conical surface of the gear ring gear to be engaged, under the action of the friction torque, the speed of the gear rapidly decreases (or increases) to be equal to the speed of the synchronizing ring, the two rotate synchronously, and the gears are opposite to each other. Since the rotational speed of the synchronizing ring is zero, the moment of inertia also disappears at the same time. At this time, under the push of the force of the shift lever, the engaging sleeve engages with the ring gear of the synchronizing ring without hindrance, and further engages with the ring gear of the gear to be engaged. , and complete the shifting process.

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1. (1) The input shaft and output shaft of the transmission rotate at different speeds. When changing gears, the two gears rotate at different speeds. If the gears are forcibly meshed without being "synchronized" first, the impact collision of the two gears will inevitably occur. , thus damaging the gears. (2) The shift of the old transmission should adopt the "two-foot clutch" method. When shifting, first step on the clutch, pull the gear out to neutral, release the clutch, stay in the neutral position for a while, and then step on the clutch again. , put the block into another block. (3) But this operation is more complicated and troublesome. Therefore, modern gearboxes are designed with "synchronizers", through which the gears to be engaged can reach a consistent speed and smoothly engage and shift. 2. The synchronizer has a constant pressure type and an inertia type. At present, all synchronous transmissions use inertial synchronizers, which are characterized by relying on friction to achieve synchronization. 3. There are chamfers (locking angles) on the engaging sleeve, the synchronizing ring and the ring gear of the gear to be engaged. The inner conical surface of the synchronizing ring is in contact with the outer conical surface of the gear ring gear to be engaged to generate friction. The friction of the conical surface makes the gear sleeve and the ring gear to be meshed quickly synchronize, and at the same time, it will produce a locking effect to prevent the gears from meshing before synchronization. 4. When the inner conical surface of the synchronizing ring contacts the outer conical surface of the gear ring gear to be engaged, under the action of the friction torque, the speed of the gear rapidly decreases (or increases) to be equal to the speed of the synchronizing ring, the two rotate synchronously, and the gears are opposite to each other. Since the rotational speed of the synchronizing ring is zero, the moment of inertia also disappears at the same time. At this time, under the push of the force of the shift lever, the engaging sleeve engages with the ring gear of the synchronizing ring without hindrance, and further engages with the ring gear of the gear to be engaged. , and complete the shifting process.