design and principle of worm gears

 Description:

• Worm gears are a category of helical rolling gears that are classified as transmission or conversion elements within machine elements.
• This type of gear comprises the usual driving worm and the driven worm wheel.
• Worm gears are quiet and have a damping effect.
• They are smaller and easier to operate than spur gears or bevel gears of the same performance and gear ratios.
• The TM 124experimental unit is used to study their torque ratios and efficiency.
• The transmission ratio of the gear can be determined.
• The basic concepts of toothing such as tooth number and gear number, module, pitch and centre distance are illustrated.
• The worm wheel and worm are mounted on ball bearings.
• The forces are generated by weights and can be varied quickly and easily.

Technical details:

Specifications:

• function and design of worm gears
• bronze worm wheel
• steel worm
• 2 aluminium cable drums
• worm, worm wheel and pulleys mounted on ball bearings
• anodised aluminium base plate

Technical Data:

• Cable drum:
  • worm shaft diameter: Ø=40mm
  • worm wheel shaft diameter: Ø=120mm
• Worm gear:
  • centre distance: 80mm
  • gear ratio: 30:1
  • module: m=4mm
  • number of gears: 1
  • force transmission: 10
• Weights on the worm side:
  • 1x 50N
  • 1x 20N
  • 2x 10N
  • 1x 10N (hanger with equalising mass)
• Weights on worm wheel:
  • 1x 5N
  • 4x 2N
  • 1x 1N
  • 1x 0,5N
  • 1x 0,5N (hanger)

Dimensions & Weight:

• L x W x H: 250x150x200mm
• Weight: approx. 22kg

Learning Objectives/Experiments:

• development of the main variables and relationships in a worm gear:
  • investigation of transmission ratio, torque, friction and self-locking
  • determine the efficiency

Scope of Delivery:

• 1 experimental unit
• 1 worm
• 1 worm wheel
• 1 set of weights
• 1 set of instructional material

Due to the continuous development of our products, the goods supplied may vary in detail to that illustrated on this Website.