Some Gear Motor OF Mechatronic Devices

 

Some Gear Motor OF Mechatronic Devices

WORM GEAR MOTOR :

A worm gear is a screw-like gear that meshes with a spur gear or a helical gear. The worm gear is usually the driving gear, while the spur or helical gear is the driven gear. Worm gear motors are often used in applications where high torque is required, such as in heavy-duty machinery, conveyors, and elevators.

Worm gears are commonly used for speed reduction because multiple conventional gear sets are needed to achieve the same effect. Rather than installing more gear sets, worm gears have an increased reduction ratio, which makes them more effective.

worm gear mechanism:

Basically, a worm gear is a screw butted up against what looks like a standard spur gear with slightly angled and curved teeth. It changes the rotational movement by 90 degrees, and the plane of movement also changes due to the position of the worm on the worm wheel (or simply "the wheel").

main advantage of worm gears :

Worm gears' main advantage is its capacity to generate high reduction ratios and, as a result, high torque multiplication. In low- to medium-speed applications, they can also be utilised as speed reducers

The high gear ratio for one pair of wheels can be 8<u <110 . 

Low load capacity (up to N< 60 kW);

Low efficiency (up to 0.71-0.94 for one pair of wheels);

Duty time 10000 h

CYCLOID GEARBOX:

A cycloidal gear is a toothed gear with a cycloidal profile. Such gears are used in mechanical clocks and watches, rather than the involute gear form used for most other gears.

The use of cycloid gearbox :

Cycloidal gears also experience lower friction and less wear on the tooth flanks due to their rolling contact and lower Hertzian contact stress. And their good torsional stiffness and capacity to withstand shock loads make them ideal for heavy industrial applications that also require servo precision and stiffness.

The components of a cycloidal gearbox :

A cycloidal gearbox (or cycloidal reducer) is comprised of four components: the input shaft, a cycloidal cam (single or compound), cam followers, and an output shaft.

Disadvantages of a cycloidal gearbox :

Disadvantages. Due to the eccentric nature of the drive, if the cycloidal disk is not balanced by a second disk or a counterweight, it will generate vibrations which propagate through the driven shafts and the body. This increases wear on the exterior teeth of the cycloidal disk and the component bearings.

The high gear ratio for one gear 3<u <191 . 

High efficiency (0.95 for one pair of wheels);

Long duty time 50000 h 

Torque 40 - 45000 N*m

PLANETARY GEAR MOTOR:

Planetary Gear Motor: A planetary gear motor shares the torsional load over several planet gears, so it works well when a higher torque is required. Torque is a twisting force that causes rotation in objects, or in this case, gears

Planetary gear motor has 4 parts Such as Sun Gear, Planet Gear, Internal Ring Gear and Carrier.Sometimes its work very fast and sometimes its slowly and also sometimes its goes clockwise and sometimes anticlokwise.

When it works very fast thats means 2 gears teeth  ( Sun gear and planet gear ) works same way . so the 2 gears will get same speed ( speed of sun gears and speed of planet gear will be equal) .

Advantage of planetary gears :

Planetary gear systems are able to produce a lot of torque because the load is shared among multiple planet gears. This arrangement also creates more contact surfaces and a larger contact area between the gears than a traditional parallel axis gear system.

How do planetary gears increase torque :

The planet gears are mounted on a joint carrier that is connected to the output shaft. The rotational speed of the output is lower than that of the drive, and the torque of the output is higher in reverse proportion. The more gear wheels mesh with each other, the higher the torque.

The gear ratio for one gear can be 1.25<u <12 

High efficiency (0.95-0.97 for one gear);

Long duty time 60000 h

Torque 460 - 736000 N*m