Machine Design: Gearbox Components
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Questions and Answers

What is the main function of a universal joint?

  • To provide strength to the propeller shaft
  • To reduce the weight of the vehicle
  • To increase the speed of the vehicle
  • To accommodate variation in angle between the gearbox and rear axle (correct)

    • Why is a universal joint needed in a vehicle?

  • To accommodate the difference in levels between the gearbox and rear axle (correct)
  • To reduce the vibration of the vehicle
  • To improve the braking system
  • To increase the power of the engine

    • What is connected to the gearbox by a flexible joint?

  • The torque tube (correct)
  • The differential housing
  • The propeller shaft
  • The companion flange

    • What can be used to provide strength in a torque tube drive?

    <p>Brace rods</p> Signup and view all the answers

    What type of joint is used in a Hotchkiss drive?

    <p>Only one universal joint</p> Signup and view all the answers

    What is the function of a slip joint?

    <p>To allow for telescoping of the propeller shaft</p> Signup and view all the answers

    What is connected between the torque tube and the differential housing?

    <p>Brace rods</p> Signup and view all the answers

    What type of drive uses a torque tube?

    <p>Torque tube drive</p> Signup and view all the answers

    What can be used in place of brace rods in a torque tube drive?

    <p>Torque bar springs</p> Signup and view all the answers

    What is the joint assembly fixed to?

    <p>The companion flange</p> Signup and view all the answers

    Study Notes

    Gearbox Components

    • Metal sealing rings are used in transmission systems where some leakage is acceptable.
    • Bushes are cylindrically shaped and held in place by press fit, taking radial load and supporting rotating parts.
    • Thrust washers are used to limit end play and reduce friction between two rotating parts, often in combination with flat thrust washers.

    Synchronizers

    • A 3-speed all helical gear, synchromesh gearbox (transmission) of a passenger car has 3 forward speed and one reverse speed for selection.
    • In neutral position, there is no flow of power from the engine-clutch primary shaft to the gearbox main shaft.

    Drive Line Types

    • Front-wheel drive has the engine and driveline located between the front driving wheels.
    • Rear wheel drive line transmits engine torque to the driving wheels or rear driving axle.
    • Drive line represents universal joints, drive shaft, and other parts transmitting engine torque to the driving wheels.

    Universal Joints

    • A universal joint provides a flexible connection between the gearbox and the rear axle, accommodating variations in angle and permitting smooth transmission of torque.
    • Universal joints are used to connect the propeller shaft and the pinion shaft of the differential, and between the propeller shaft and the gearbox.
    • Types of universal joints include:
      • Hotchkiss drive
      • Torque tube drive

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    Description

    This quiz covers the components of a gearbox, including gears, bearings, and sealing rings. It explains the functions and designs of these elements.

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