What is Front Axle, Stub Axle? – Types, Function, Diagram

What is Front Axle, Types Of Front Axle, What Is Stub Axle, Working Of Stub Axle, Types Of Stub Axle, Stub Axle Diagram & Front Axle Diagram.

The front axle uses to carry the weight of the front part of the vehicle as well as to facilitate steering and absorb shocks due to road surface variations. It is made of I-section in center position while the ends are made either circular or elliptical with the construction.

Introduction

An axle is a central shaft for a rotating wheel or gear. A wheeled vehicle, the axle may be fixed to the wheels, rotating with them or attached to its surroundings with the wheel rotating around the axle. In the former case, bearings or bushes provide at the mounting points where the axle is supported.

For cars and trucks, the shaft itself rotates with the wheels, being bolted or splined in fixed relation to it, and is called an axle or axle shaft. However, it is genuinely the surrounding housing that is called an axle (or axle housing).

What Is Front Axle?

Front Axle

The front axle uses to carry the weight of the front part of the vehicle as well as to facilitate steering and absorb shocks due to road surface variations. It is made of I-section in center position while the ends are made either circular or elliptical with the construction.

It takes bending loads and also torques due to braking of the wheel. To keep the low chassis heights, its center portion gives a down-step sweep. Some times it also transmits torque from the differential to the drive wheels.

( Front Axle Video By Skill Lync)

The Necessity Of Front Axle

It is necessary to carry and to support a part of vehicle weight and facilitate steering and absorb road shocks as well as torque applied to due to braking of the vehicle. And some times it transmits torque from the differential to the drive wheels.

Classification Of Axle

1. Front Live Axle

The live axle receives power from the gearbox and transmits it to the road wheels. It is the axle containing the differential mechanism through which the engine power flows to the front of the wheels. For steering the front wheel, a constant velocity joint includes in the half shaft; these joints help in turning the stub axle around the kingpin.

2. Front Dead Axle

Is it just a dummy axle having no connection with the engine? These axles do not rotate with the driver when compared to live axles. The Dead front axle has sufficient rigidity and strength to transmit the weight of the vehicle form the springs to the front wheels.

The ends of the axle beam shape suitably to assemble the stub axle. To accommodate a swivel pin connecting the sub axle portion of the assembly, the terms of a part of the beams are usually shaped either as a yoke or unattractive surface with a drilled hole.

Also, Read : What is Clutch? – Types, Working, Application, Diagram

What Is Stub Axle?

Stub Axle

A stub axle is a sub-assembly of a front axle beam upon which the road wheel mount. Stub axle is connected to the front axle using kingpin. These stub axles turn about the kingpin, which is a light drive fit in the axle beam eye, located and locked by the taper cotter pin.

Also, Read : What is Differential? – Types, Working, Parts, Diagram

Types Of Stub Axle

1. Elliot Type Stub Axle

Elliot Type Stub Axle

This type of stub axle is attached to the front axle by placing it in the yoke end with a kingpin and a cotter to join the two together. The swivel pin is usually fixed in the stub axle forging with its purposes turning in the forced closing of the axle beam. Axle beam forms as a yoke and receives stub axle. The thrust washer place at the top portion of the stub axle.

Also, Read : What Is Gearbox? – Definition, Types, Working, Diagram

2. Reverse Elliot Type Stub Axle

Reverse Elliot Type Stub Axle

The reverse Elliot type stub axle forms the fork end to receive the front axle beam. The front axle end forms eye, and the thrust washer placed at the bottom of the front axle beam that is at the contact face with the stub axle.

The cotter pin in the joint that locks the movement of the kingpin in the front axle. The kingpin is free to move in the phosphor bronze bushes placed in the eye of the fork end. The thrust washer takes vertical load in the joint and its use to increase the life of both the stub axle and front axle. Stub axle forms as a yoke and receives the front axle. Thrust washer placed at the bottom.

Also, Read : What Is Universal Joint? – Function, Types, Working, Diagram

3. Lamoine Type Stub Axle

Lamoine Type Stub Axle

The front axle beam end forms the eye to take support on the stub axle. The stub axle and kingpin integrates to create reverse. L shape assembly receives the front axle. The thrust washer place between the stub axle and front axle beam. Here the cotter pin in the joint is used to lock the front axle in position. The kingpin is free to move in the bushes placed in the eye of the front axle. The thrust washer takes the vertical load in the joint.

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4. Reverse Lamoine Type Stub Axle

Reverse Lamoine Type Stub Axle

The front axle beam-ends forms eye to take support the stub axle. The stub axle and kingpin integrate to form an inverted L shape assembly to receive the front axle.

The thrust washer is placed at the bottom, as shown in the figure. The cotter pin in the joint use to lock the front axle in position. The kingpin is free to move in the bushes placed in the eye of the shaft. The thrust washer takes the vertical load, and it increases the life of both the stub axle and front axle.

FAQ

Q. What is a Front Axle?

The front axle uses to carry the weight of the front part of the vehicle as well as to facilitate steering and absorb shocks due to road surface variations. It is made of I-section in center position while the ends are made either circular or elliptical with the construction.

Q. What is Stub Axle?

A stub axle is a sub-assembly of a front axle beam upon which the road wheel mount. Stub axle is connected to the front axle using kingpin. These stub axles turn about the kingpin, which is light drive fit in the axle beam eye, located and locked by the taper cotter pin.

Q. What are types of front axle?

1. Dead Front Axle
2. Live Front Axle

Q. What are types of stub axles?

1. Elliot
2. Reversed Elliot
3. Lamoine
4. Reversed Lamoine

Q. What are the functions of the front axle?

– It supports the weight of the front part of the vehicle.
– It facilitates steering knuckles and suspension springs.
– It transmits the weight of the vehicle through springs to the front wheels.
– It absorbs torque applied on it due to braking of the vehicle.

Q. What are the parts of the front axle?

1. Axle beam
2. Kingpin or Swivel pin
3. Track rod
4. Pull and push rod or drag link

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