What Is a Pulley Assembly?

The tapered sleeve pulley is a mechanical coupling assembly in which a tapered sleeve is inserted between the mounting shaft and the pulley, wherein the pulley is self-locked to the tapered sleeve by the hexagonal screw, and the installation shaft is held tightly by the tapered sleeve.

Cone sleeve pulley

Right!

The tapered sleeve pulley is a mechanical coupling assembly in which a tapered sleeve is inserted between the mounting shaft and the pulley, wherein the pulley is self-locked to the tapered sleeve by the hexagonal screw, and the installation shaft is held tightly by the tapered sleeve.

The taper sleeve is mainly divided into TB taper sleeve and QD taper sleeve. The holes where the taper sleeve matches the pulley are half-sided, and the two light holes on the taper sleeve and the two threaded holes on the pulley form a complete one. Hole, a threaded hole on the cone sleeve and a light hole on the pulley constitute a complete hole. During assembly, the two screws are placed in the two threaded holes of the pulley. As the screws are continuously tightened in the threaded holes of the pulley, the screw action pushes the screws to the small end of the tapered hole on the pulley.

Compared with ordinary straight hole belt pulleys, it has many advantages: compact structure, no shaft positioning, easy installation, only need to choose cone sleeves with different apertures, the same pulley can be applied to different shaft diameters, increasing product universality Performance, allowing larger shaft diameter tolerances, groove shapes can be equipped with V-belts, narrow V-belts, etc ...

Tapered sleeve belt pulley is a new type of mechanical transmission connection part commonly used in European and American countries. The 8 degree outer tapered surface is tightly connected with the inner tapered surface of the pulley to greatly improve the centering accuracy of the transmission. The size of the taper sleeve is a standard design of the series. The inner keyway is machined according to ISO standards. The interchangeability is very good, suitable for various occasions. When the transmission part is running for a long time, the inner hole and the chain groove may be damaged. If it is a transmission part using this cone sleeve, when this happens, you only need to replace The cone cone of the same specification can be used again. Thus greatly increasing the service life of transmission parts, reducing maintenance costs and saving time.

Installation / removal requires only one inch hex wrench, no other special tools required, convenient and quick (it only takes about 1 minute to complete).

· The separation of the pulley and the tapered sleeve makes the change of the shaft hole only need to change the diameter of the tapered sleeve, which increases the versatility of the product and greatly reduces the inventory type and cost of the product.

The reliability of its transmission is proven in millions of uses worldwide.

· Allow a wider shaft diameter tolerance: + 0.05mm -0.125mm (0,002 to-0.005 ).

Light / medium light load allows keyless transmission.

· Press strictly

Installation and removal of pulleys

I. Installation:
1. Check the groove of the pulley to ensure that there are no scars or sharp edges, and all dimensions meet the standards;
2. Clean the surface of all parts, such as hub holes, taper sleeves, screw holes, etc. Fit the cone into the pulley so that all the screw holes are aligned.
3. Lubricate the screw (TB 1008-TB 3030) and thread (TB 3525-TB 5050) into the mounting holes, but do not tighten them temporarily.
4. Clean the surface of the drive shaft, push the belt pulley with the tapered sleeve to the predetermined position on the shaft, and check whether the triangle belt pulley is aligned.
5. When using a keyway, it must first be inserted into the shaft hub. There must be a certain tolerance between the keyway and the hole hub.
6. Using a hexagon wrench according to DIN911, tighten the bolts in each mounting hole gradually and evenly until the torque shown in the table below is reached.
7. After a short period of operation (0.5 to 1 hour), check the tightening torque of the bolts and re-tighten if necessary.
8. To prevent foreign matter from entering, fill the connection holes of the holes with grease.

Second, disassembly:
1. Loosen all bolts, take out one or two bolts according to the number of removal holes, lubricate the bolt pattern and bolt tip with oil, and insert the bolts into the removal holes as shown in the figure below.
2. Tighten the bolts alternately until the taper sleeve and the pulley are loosened.
3. Take out the cone sleeve and pulley from the shaft.

Precautions when assembling and installing the pulley

1. For the last cleaning before assembly, gasoline must be used to ensure that all parts are clean and dry, to ensure that the mating surfaces are tightly fitted without oil, and have sufficient friction. 2. Hexagon bolts used for assembly should also be washed and dried with gasoline before assembly. Do not apply lubricating oil or grease to bolts or screw holes to ensure sufficient friction and self-locking ability after bolts are tightened.
3. When the three hexagon socket bolts are about to be installed, they need to be tightened in turn to ensure that the tapered sleeve receives uniform axial force, and that the coaxial positioning of the pulley and the tapered sleeve is good.
4. Check and measure the length of the hexagon socket bolts for assembly before installation to ensure that the assembly bolts can bear against the bottom end of the blind hole of the tapered sleeve after tightening, to ensure that the tapered surface fits tightly, and to ensure that the bolts are subjected to the reverse thrust of the bottom end of the blind hole. The double nut principle has the same anti-loosening effect.
5. After the pulley is tightened, check the wire and adjust the relative positions of the master and driven pulleys to ensure that the two wheels are on the same plane and the belt is properly tensioned.
6. The pulley cover should be intact and securely installed to ensure that a broken belt or a loose pulley exits during operation to cause a major safety accident.
7. The taper sleeve is a wearing part. After a long period of operation, the inner hole and the chain groove may be damaged. It should be inspected before each assembly. If defects are found, the spare parts should be replaced in time.