What is a synchronizer in a car transmission?

In fact, the synchronizer is a friction plate arranged on the combination sleeve and gear set, which is different from the general friction plate, and its friction surface is tapered. The function of this group of friction plates is to rub in advance before the vertical teeth of the spur teeth and the vertical teeth of the disc come into contact, so as to transfer the energy of the party with a larger speed to the party with a smaller speed, so that the party with a smaller speed can increase the speed and achieve synchronization with the speed of the party with a larger speed. This can not only ensure normal shifting, but also play a role in buffering, and the number and material of the cone friction plate group directly affect the performance of the synchronizer.

Inside the structure of a manual gearbox there is a very important device, and that is the "synchronizer". The role of the synchronizer is very obvious, that is, when changing gears, because the gear speed of the power take-off end is faster than the gear that is about to be shifted into this gear, if there is no synchronizer, a slow-rotating gear is forcibly stuffed into a high-speed rotating gear, and the phenomenon of toothing will definitely occur.

Gearbox. The difference between with synchronizer and without synchronizer is: different gear starts, different phenomena, and different gear shifts.

First, the start of the gear is different.

1. Gearbox with synchronizer: When the gearbox with synchronizer starts, it does not need to wait for the gearbox to adjust the speed, and then it can be connected to the gear.

2. The gearbox does not have a synchronizer: if the gearbox does not have a synchronizer, you need to wait for the gearbox to adjust the speed before you can put it into gear.

Second, the phenomenon is different.

1. Gearbox with synchronizer: The gearbox with synchronizer will not appear in gear.

Rattle, the phenomenon of slapping teeth.

2. The gearbox does not have a synchronizer: the gearbox without a synchronizer is prone to the phenomenon of gear hanging sound and tooth beating.

Third, the shift is different.

1. Gearbox with synchronizer: The gearbox with synchronizer can directly adjust the gearbox gear.

Achieve coordination for digging and digging.

2. The gearbox does not have a synchronizer: the variable spring core gearbox without a synchronizer must rely on the throttle and clutch to complete the gear shift.

1) There are three kinds of synchronizers:

Atmospheric synchronizer.

Inertial synchronizer is divided into locking ring type and locking pin type.

Automatic car destroyer booster synchronizer.

2) Due to the closure of the preparation for in the transmission.

The synchronizer for the middle Hucha can eliminate or reduce the impact and noise of the gear when the gear is engaged, reduce the wear of the gear, and make the gear shift light.

The transmissions are all with synchronizers.

1. Gearbox with synchronizer: When the gearbox with synchronizer starts, there is no need to wait for the gearbox to adjust the speed before it can be directly put into gear;

2. Gearbox with synchronizer: gearbox with synchronizer will not appear to be in gear and teething;

3. The gearbox does not have a synchronizer: when the gearbox does not have a synchronizer, it needs to wait for the gearbox to adjust the speed before it can be put into gear;

4. The gearbox does not have a synchronizer: the gearbox without a synchronizer is prone to a gear ring, and the difference between the synchronizer and the non-synchronizer is as follows

1. Gearbox with synchronizer: When the gearbox with synchronizer starts, there is no need to wait for the gearbox to adjust the speed before it can be directly put into gear;

2. Gearbox with synchronizer: gearbox with synchronizer will not appear to be in gear and teething;

3. The gearbox does not have a synchronizer: when the gearbox does not have a synchronizer, it needs to wait for the gearbox to adjust the speed before it can be put into gear;

4. The gearbox does not have a synchronizer: the gearbox does not have a synchronizer, which is prone to the phenomenon of hanging gear and tooth beating.

Question: For gearboxes without synchronizers, do you step on two feet to clutch when shifting gears?

1. The requirements are different when changing gears.

When the adjacent gears are converted to each other, the reason that different operation steps should be taken is also applicable to the situation of moving gear shifting, but the rotation angular velocity of the former gear ring to be engaged and the engagement sleeve is required to be consistent, and the linear velocity of the meshing point of the gear to be engaged of the latter is required to be the same, but the speed analysis principle is the same.

2. The gearbox brand is different.

The function of the synchronizer is to force the speed synchronization when the speed of the two shafts is different, that is to say, it is easier for the main box to have a synchronizer when the gear is in gear, and there will be no gear ring, the phenomenon of tooth beating, the difference is that the name plate of the gearbox has the letter (T) is the full belt synchronizer, and there is no only the subbox has a synchronizer.

3. The operation is different.

The synchronizer plays a coordinating role between the gearbox gears, and without the synchronizer, the throttle and clutch must cooperate to complete the gear shift.

Synchronizers are available in atmospheric pressure type and inertial type.

At present, all synchronous transmissions use inertial synchronizers, which are mainly composed of coupling sleeves, synchlock rings, etc., and are characterized by relying on friction to achieve synchronization.

There are chamfers (locking angles) on the gear ring of the coupling sleeve, the synchroping ring and the gear to be engaged, and the inner cone surface of the synchronizing ring is in contact with the outer cone surface of the gear ring of the gear to be engaged. The locking angle and cone surface have been appropriately selected in the design, and the friction of the cone surface makes the sleeve to be meshed quickly synchronize with the ring gear, and at the same time produces a locking effect to prevent the gear from meshing before synchronization.

When the inner cone surface of the synchronizing ring is in contact with the outer cone surface of the gear ring of the gear to be engaged, the gear speed is rapidly reduced (or increased) to the same speed as the synchronous locking ring under the action of frictional torque, and the two rotate synchronously, and the rotation speed of the gear relative to the synchronous locking ring is zero, so the moment of inertia also disappears at the same time, and at this time, under the impetus of the force, the joint sleeve is engaged with the gear ring of the synchronizer lock ring without hindrance, and further engages with the gear ring of the gear to be engaged and completes the gear shift process.

1) Why should you adopt a synchronizer.

When the adjacent gears are converted to each other, the reason that different operation steps should be taken is also applicable to the situation of moving gear shifting, but the rotation angular velocity of the former gear ring to be engaged and the engagement sleeve is required to be consistent, and the linear velocity of the meshing point of the gear to be engaged of the latter is required to be the same, but the speed analysis principle is the same.

Shifting in transmissions, especially from high to low gears, is complex and prone to shocks between the teeth or splines. To simplify operation and avoid inter-tooth impacts, a synchronizer can be set in the gear shifter.

The inertial synchronizer relies on friction to achieve synchronization, and a special mechanism is provided on it to ensure that the joint sleeve and the spline gear ring to be engaged cannot be in contact before the synchronization is reached, so as to avoid the impact between the teeth.

2) The type and structure of the synchronizer.

There are types of synchronizers, such as atmospheric pressure type, inertial type and self-increasing type.

The role of the synchronizer is very obvious, that is, when changing gears, because the gear speed of the power take-off end is faster than the gear that is about to be shifted into this gear, if there is no synchronizer, a slow-rotating gear is forcibly stuffed into a high-speed rotating gear, and the phenomenon of toothing will definitely occur.

The function of the synchronizer is to synchronize the speed of the crankshaft with the speed of the first shaft of the gearbox to reduce the impact of the gear.

Therefore, the car equipped with a synchronizer has a sleek speed and is easy to operate.

This cannot be judged in one word, for example, after braking suddenly, the speed of the car is low, and you can jump gears and change gears. In general, it is better to follow the tutorial.

If the differential speed is too large, it will bring an overload to the synchronizer and gearbox. It's dangerous.

After proficiency, there is no synchronizer, and both foot clutches can be omitted.

Of course, the two-foot clutch has its reason, and developing good habits is also very environmentally friendly for your car.