Worm gear sets and bevel gears What do they do?

It is used to transmit motion and power between two intersecting shafts.

The obvious advantages of bevel gears are their long service life, high load carrying capacity, and good surface resistance in terms of chemical and corrosion resistance. Due to its relatively low weight, as well as shock absorption, noise reduction, and cost savings, it is ideal for many systems.

Considering that the gear is subjected to a lot of force when working, it is required to have high bending fatigue strength and contact fatigue strength, so the tooth surface of the tapered wheel should have high hardness and wear resistance, and the core has high enough strength and toughness to meet the conditions. In addition, the gears must also go through a series of heat treatment processes without deformation.

First of all, let's talk about the characteristics of the turbine worm.

1.Large transmission ratios can be obtained, which are more compact than the staggered shaft helical gear mechanism.

2.The linear contact between the two wheel meshing tooth surfaces is much higher than that of the staggered shaft helical gear mechanism.

3.The worm drive is equivalent to the spiral drive, which is a multi-tooth meshing drive, so the transmission is stable and the noise is very small.

4.It is self-locking. When the lead angle of the worm is less than the equivalent friction angle between the meshing teeth, the mechanism has self-locking and can realize reverse self-locking, that is, the worm gear can only be driven by the worm, and the worm gear cannot be driven by the worm gear.

For example, the self-locking worm mechanism used in hoisting machinery can play a role in safety protection due to its reverse self-locking.

5.The transmission efficiency is low, and the wear is more serious. When the worm gear and worm are meshed for transmission, the relative sliding speed between the meshing teeth is large, so the friction loss is large and the efficiency is low.

On the other hand, the relative sliding speed makes the tooth surface wear serious and heated, in order to dissipate heat and reduce wear, the most expensive materials with better friction reduction and wear resistance and good lubrication devices are often used, so the cost is higher.

6.The axial force of the worm is large.

Let's talk about the characteristics of bevel gears.

1. High transmission efficiency, low friction resistance, accurate instantaneous transmission ratio, large transmission torque, stable transmission, reduced noise, especially suitable for high-speed transmission.

2. The specific pressure of the load is reduced, the wear is more uniform, and the load capacity of the gear is increased accordingly, and the service life is long.

3. Change the direction of torque transmission, and the input shaft can be at any angle you want with the output shaft through design.

4. The tooth surface can be ground to reduce noise, improve the contact area and improve the tooth surface finish. If the grinding accuracy is carried out, it can reach 5 grades.

Worm gear set: There is a problem with this statement, what you are talking about should be a worm gear, characteristics: the reduction ratio is large, and the angle between the input shaft and the output shaft is generally 90 degrees and unequal height.

Due to the serious friction of the tooth surface during work, the work efficiency is low and the general transmission is irreversible, so it is mostly used in places where large reduction ratios are required.

Tapered gear: the input shaft and output shaft are generally 90 degrees and their axes intersect, the gear is subjected to axial force when working, and the transmission efficiency is high.

The role of spur gears and worm gears is to reside forces the speed and direction of motion. and reducing the speed of the pin, and increasing the torque. Advantages of spur gears and worm gears:

The single-stage "transmission ratio" is large; In contact with the meshing "for" line, it can withstand greater power; Compact structure, stable transmission and no noise. Disadvantages: The two axes are perpendicular in the same state, and the linear speed of the two wheel nodes is vertical, so the relative sliding speed is very large, and it is easy to heat up and wear; The efficiency is low, and the general efficiency is in.

Hello dear, glad to answer for you, dear hello, the relevant information just queried for you shows that the role of spur gear and worm gear is as follows, spur gear The most common gear is the spur cylindrical gear, which is used for large gear reduction. The teeth on the spur gear are straight and mounted in parallel on different shafts. Spur cylindrical gears are used in washing machines, screwdrivers, clockwork, and other equipment.

Because of gear meshing and collision, each impact produces a loud noise and causes vibrations, which is why spur cylindrical gears are not used in machinery such as automobiles. Worm gears Worm gears are used for large gear reductions. The gear ratio range is 5:

1 to 300:1 is typical. The purpose of the setup is to allow the worm to turn the gear, but the gear cannot turn the worm, the angle of the worm is shallow so that the gear is held in place due to the friction between the two, the transmission is suitable for conveyor belt systems where the locking function can be used as a brake or emergency banquet stop device.

It is the radius of the round throat on the worm gear tooth shape, and its value r=worm gear center distance - worm gear throat circle diameter 2).

And the diameter of the worm gear throat circle = (number of worm gear teeth + 2) * modulus is equivalent to the outer diameter of the ordinary gear.

Worm gear indexing circle diameter: d2=mz2

Worm gear displacement system cautious play: normal modulus: mn=mcos diameter of worm tooth top circle: da1=d1+2ha1

Diameter of worm tooth root circle: df1=d1-2hf1 worm gear throat circle diameter: da2=d2+2ha2

Arc radius of worm gear tooth top: RA2 = arc radius of worm gear tooth root: RF1 = diameter of worm gear top circle:

When z1=1:de2When z1=2--3:de2:

When z1=4--6:de2:worm lead angle:

End face pressure angle za type: x=

Other types: tan x=tan cos

Normal pressure angle za type: tan n=tan cos other type: n=

Axial tooth thickness of worm: sx1=px 2=m 2

Worm normal tooth thickness: sn1=sx1cos

Worm gear indexing tooth thickness: s2=(

Worm tooth width: B1 (11+.)

Worm gear tooth width: tooth surface sliding speed: vs=d1 1 cos

The difference is that one is mated with gears and the other is mated with worms. Gears are divided into spur, helical, bevel and other forms; Worm gears, on the other hand, are closer to helical gears, but in order to achieve the best transmission efficiency, the worm gear will cut a concave surface on the tooth surface. However, in actual production, it is necessary to determine the shape of the worm gear according to the processing technology, such as plastic and powder metallurgy worm gears.