The distribution of torque from the engine to the driving bridges of a motor vehicle with two or more axles is included in the function of the discharge box or undamper function. Dust-box types
Dust-box types
There are several types of distribution boxes that differ according to the purpose of the vehicle on which they are installed. Three main types are adopted: the location of the leading bridges, with a base and non-axle shaft, with the lead bridges with locked and differential drives; one-, two-or three-step.
Cars equipped with a full-drive system are required to be fitted with a sliding box.
Dearbox design and details
Although there are some differences, you can allocate all of the devices in the device.
The box consists of:
- The driving shaft;
- interaxial differential
- Interaxial differential locking mechanism;
- shaft of the rear axle
- Coupling (or jagged) gear;
- Reduction of transmission;
- shaft of the front axle.
The torque shall be transmitted to the leading shaft from the gearbox. The function of the inter-axial differential is the distribution of the torque among the axles. It allows them to rotate with different angular speeds.
The symmetrical interaxial differential is equally divided by the torque among the axles. The asymmetric axial differential is distributing the same point in a certain ratio. Interaxial differential is not used in full-drive systems with automatic and manual connections.
The interaxial differential locking mechanism provides a complete or partial shutdown, resulting in a rigid coupling of the front and rear axles between each other and the full realization of the vehicle's 4x4 capabilities. Differential lock may be manual or automatic.
The rear axle drive shall be fitted to the leading shaft. The cordon or gear function is to ensure the delivery of the torque to the front axle.
The gear train consists of a leader and a driven wheel and a drive chain. In addition to the chain, cylindrical gears can be used in the gearbox.
The lower gear is the torque increase when the vehicle is driven off-road. It is in the shape of a planetary reductor and is installed in the cross-box of SUVs.
The vehicles with a fully-manual system with manual connections allow the front axle to be used. The permanent full-drive discharge boxes include the disconnection of the front shaft (s).
The design of the handbag shall determine the modes of operation of the box. This could be:
- Rear-end bridge activation
- The inclusion of two bridges;
- Inclusion of two bridges with interaxial differential locking;
- The inclusion of two bridges on the reduction gear with interaxial differential locking;
- Enable two bridges when automatically locking the differential cross-axis.
You can use the control lever, switch switch, or the toolbar buttons to change the break modes.
Characteristics of the distribution box
The gearbox is a complex technical unit of the car, so there can be many reasons for its failure.
Signs of break-down are the driving sound when the vehicle moves at high speed, the vibration of the floor of the body at the start and the start of the acceleration. The resulting noise at the turn or wheel wheel also indicates problems in the work of the gearbox.
Quite often, the breakup of the box is a differential lock and a spontaneous turning off.
In all such cases, it is worth drawing attention to this and to turn to specialists.