Wheel drives with hinges of equal angular velocities are used to transfer torque from the main gear to the driving wheels at different angles of rotation of the wheels and suspension strokes

When designing the drives, they try to do the same length, because this condition ensures equality of forces and moments arising on the driving wheels.

It is difficult to fulfill this condition on a car with a transverse arrangement of the power unit, therefore, on such cars, as a rule, the right drive is much longer than the left drive.

For a car with a manual transmission, design solutions were applied to bring the drive lengths of the driving wheels closer together.

Nissan Almera wheel drive designNissan Almera wheel drive design

This was achieved due to the different design of the internal hinges.

In order to increase the length of the drive of the left wheel, the inner hinge of the drive is made inside the gearbox housing.

In order to reduce the length of the drive of the right wheel, the housing of the inner hinge is moved away from the gearbox housing.

To do this, an additional element was introduced into the gearbox design — a spline shaft, which is made in one piece with the semi-axial gear of the differential.

A rubber damper is installed on the drive shaft of the right wheel.

The external internal hinges of the drives (of the "tripod" type) have different designs.

The drive hinges are covered with dirt-proof covers.

Nissan Almera wheel drive designNissan Almera wheel drive design

The internal hinge of the drive provides the possibility of angular movements of the suspension and compensates for the mutual movements of the suspension and the power unit by changing the length of the drive.

The inner hinge is collapsible. At the spline end of the drive shaft, a hub with three spikes is mounted on the side of the inner hinge – a three-stud, on each of the spikes (trunnion) of which there is a roller with an outer spherical surface rotating on a needle bearing.

Nissan Almera wheel drive design

The needle bearing is fixed from displacements along the tire axis by a locking ring worn on a locking ring located in the tire groove.

The three-stud is fixed on the drive shaft by a locking ring.

The mutual movements of the suspension and the power unit are compensated by the movement of the three-stud rollers in the longitudinal grooves of the inner hinge housing.

The internal hinges of the left and right wheel drives are not interchangeable.

Nissan Almera wheel drive design

The tip of the housing of the inner hinge of the right wheel drive is put on the spline shaft coming out of the gearbox crankcase and made at the same time with the semi-axial gear of the differential (for clarity shown on the dismantled gearbox).

A spring installed inside the housing of the inner hinge of the right wheel drive ensures that the hinge housing is pressed against the semi-axial gear of the differential during suspension operation.

Nissan Almera wheel drive design

The housing of the inner hinge of the left wheel drive is located in the gearbox and is made at the same time with the left semi-axial gear of the differential (shown with the drive removed).

Nissan Almera wheel drive design

A needle bearing assembly with an oil seal is installed on the drive shaft of the left wheel behind the three-stud inner hinge.

The inner ring of the bearing is pressed onto the drive shaft and rotates with it.

A protective cover of the inner hinge is fixed on the fixed outer ring of the bearing with a yoke.

With its other end, the hinge cover is attached to the gearbox housing using a metal flange holder.

The oil seal installed in the outer ring of the bearing prevents oil leakage from the gearbox along the drive shaft.

The oil seal of the bearing is closed from dirt by a plastic dirt reflector mounted on the shaft.

If the dirt cover of the hinge or the oil seal of the bearing is damaged, oil will leak from the gearbox.

The external hinge of the drive ensures the transmission of torque at different angles of rotation of the drive wheels.

Nissan Almera wheel drive design

The outer hinge consists of a housing, a separator, a cage and six balls, which are placed in the profiled grooves of the housing and the cage.

The separator constantly holds the balls in the bisector plane between the housing and the hinge cage and ensures uniform transmission of rotation from the cage to the housing.

The grooves in the housing and the cage are made along the radius. The details of the hinge are made with high precision, the balls are selected by one sorting group.

Therefore, the worn-out hinge is replaced in the assembly. The hinge clip is mounted on the shaft slots and is fixed from the longitudinal displacement by a locking ring.

The slotted shank of the outer hinge housing, at the end of which the thread is cut, is inserted into the hub of the front wheel and fastened with a nut.

The outer hinges of the left and right wheel drives are the same.

Replenishment or replacement of lubrication, as well as any other maintenance of the shafts of the wheel drives during the operation of the car is not required.

The owner of the car only needs to monitor the condition of the protective covers of the hinges and the clamps of their fastening, as well as the condition of the oil seal of the bearing of the inner hinge of the left drive.

The damaged cover must be replaced as soon as possible, since dirt getting into the grease causes rapid wear of the hinge parts and its failure, and damage to the rubber cover or the oil seal of the bearing of the inner hinge of the left drive will lead to oil leakage from the gearbox and gearbox failure.

When installing a new hinge cover, the clamps of its fastening should also be replaced with new ones.

The bearing (complete with oil seal) of the inner hinge of the left wheel drive is supplied in spare parts together with a protective cover.