What is the work of shock absorber in a car?
The role of the shock absorber is to keep the car’s tyres in permanent contact with the road, helping to provide optimum grip, when cornering and braking. Shock absorbers are part of the suspension, so if the shocks are worn, the vehicle’s ride and comfort is compromised.
What is the purpose of shock absorber in suspension system?
Answer: Shock absorbers are an integral part of a vehicle’s suspension. A shock absorber is designed to absorb or dampen the compression and rebound of the springs and suspension. They control the unwanted and excess spring motion.
What component transfers vehicle weight to the wheels?
Suspension
What kind of suspension is used only at a non driven rear axle?
Tech B says that semi-independent rear suspension is only used on non-drive axles.
Why is rack and pinion better than recirculating ball?
Rack and pinion provides less mechanical advantage than other mechanisms such as recirculating ball, but less backlash and greater feedback, or steering “feel”. The mechanism may be power-assisted, usually by hydraulic or electrical means.
How do you calculate worm gear ratio?
The number of threads in a worm is the number of teeth in a worm. The speed transmission ratio of a worm and worm gear set is obtained by dividing the number of teeth of the worm gear by the number of threads of the worm.
Can a worm gear be driven backwards?
Single-start worm gears operate in one direction only; due to high friction between the worm and the worm wheel, the worm cannot be driven backwards. Due to their compact nature, worm gear reducers are often used in small electric motors.
Why is the efficiency of worm gear low?
Worm gear. Efficiency of a worm-gear speed reducer depends (in part) on its speed-reduction ratio. High-ratio units have a smaller gear-tooth lead (helix) angle, which causes more surface contact between them. This higher contact causes higher friction and lower efficiency.
How can I increase my gearbox efficiency?
Different methods are discussed for power loss reduction in a gearbox. No load losses can be reduced, especially at low temperatures and part load conditions when using low viscosity oils with a high viscosity index and low oil immersion depth of the components.
What is the formula for maximum efficiency of worm gear?
Maximum efficiency = (1-sin ø)/(1+sin ø) = 0.8871 = 88.71%.
What is the Centre distance for the worm gear?
53 mm
What is the velocity ratio of worm gears?
Given a single start worm, a 20 tooth worm wheel reduces the speed by the ratio of 20:1. With spur gears, a gear of 12 teeth must match with a 240 tooth gear to achieve the same 20:1 ratio.
Which gear does not produce axial thrust?
herringbone gear
What is module in gear?
Module” is the unit of size that indicates how big or small a gear is. It is the ratio of the reference diameter of the gear divided by the number of teeth.
Which type of gear will not produce axial thrust while transmitting torque?
Spur gears produce reaction loads only radially to the shaft and do not produce axial thrust loads. They are used in slow to moderate speed applications like mill drives, hoisting equipment, washing machines, and screwdrivers.
Which gear is used for high speed?
Straight bevel gear reducers are suitable for slow rotation under 1000rpm, and standardized reduction ratios are 1:1 and 1:2. In addition, the meshing ratio of the spiral bevel gear reducer is large and suitable for high load and high-speed rotation compared to straight bevel gear reducers.
What is the difference between herringbone and double helical gears?
Definition. Herringbone and double-helical gears are helical gears with both left- and right-hand helices. A herringbone gear has no gap between the helices. A double-helical gear has a gap between the helices.
What are the advantages of helical gear?
Advantages of helical gears Helical gears last longer and are ideal for high-load applications, since they have a higher amount of teeth in contact. Load is at all times distributed among several axes, which produces less wear. They can transfer motion and power both among parallel and straight-angle axes.