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Timing Belt Carrying Capacity Is Higher
Aug 11, 2017

The Timing Belt gear can be classified according to the tooth shape, the gear shape, the tooth shape, the surface of the teeth and the manufacturing method.

The tooth profile of the gear includes tooth profile curve, pressure angle, tooth height and displacement. Involute gears are easier to manufacture, so the use of modern gear, involute gears accounted for an absolute majority, and cycloidal gears and arc gear applications less.

In the pressure angle, the small pressure angle gear bearing capacity is small; and large pressure angle gear, although the carrying capacity is high, but the same transmission torque in the case of bearing load increases, so only for special circumstances. The gear teeth have been standardized, generally using standard tooth height The advantages of variable gears have been all over the various types of machinery and equipment.

In addition, the gear can be divided into cylindrical gears, bevel gears, non-circular gears, racks, worms and worms according to their shape; according to the shape of the tooth is divided into spur gears, helical gears, herringbone gears, curved gear; Surface is divided into external gears, internal gear; according to the manufacturing method can be divided into casting gear, cutting gear, rolling gear, sintering gear.

The manufacturing material and heat treatment of the gears have a significant effect on the load carrying capacity and size of the gears. Before the 1950s, gears were made of carbon steel, and in the 1960s, alloy steel was used instead of surface hardened steel in the 1970s. According to the hardness, tooth surface can be divided into two kinds of soft tooth and hard tooth surface.

Soft tooth surface bearing capacity is low, but the manufacturing is relatively easy, running good, and more for the transmission size and weight without strict restrictions, and small production of general machinery. Because the pair of gears, the heavy wheel load heavier, so in order to make the size of the gears working life roughly equal, the small tooth surface hardness is generally higher than the big round.

Hardened gear bearing capacity is high, it is fine after the gear, and then quenching, surface hardening or carburizing quenching to improve the hardness. However, in the heat treatment, the gear will inevitably produce deformation, so after the heat treatment must be carried out grinding, grinding or fine cutting, in order to eliminate the deformation caused by the error, improve the accuracy of the gear.

The belt drive is composed of an annular belt with equidistant teeth on the inner peripheral surface and a pulley with corresponding teeth. During operation, the teeth are engaged with the pulley of the pulley to transmit movement and power. It is a belt Transmission, chain drive gear drive their own advantages of the new belt drive. Timing belt and synchronous wheel installation and use Note: to reduce the center wheel distance, if the tension wheel should be released, put the tape and then adjust the center distance. For a drive with a fixed center distance, remove the pulley, attach the strap to the pulley, and then attach the pulley to the shaft.

Installation should also note the following:

① When installing the timing belt, if the center distance of the two pulleys can be moved, the center distance of the pulley must be shortened, and the center belt should be reset. If there is tension when the wheel, the first tension wheel to relax, and then install the belt, and then loaded on the tension wheel. ② to the belt with the timing belt, remember not to force too much, or with a screwdriver hard pry the timing belt to prevent the timing belt in the appearance of the tensile layer can not see the phenomenon of broken. When designing the pulley, it is preferable to use a structure in which the two axes can be moved closer to each other. If the structure is not allowed, it is preferable to install the timing belt with the pulley on the corresponding shaft.

③ control the appropriate initial tension.

④ synchronous belt drive, the parallelism of the two pulley axis requirements are relatively high, otherwise the timing belt in the work will produce deviation, or even out of the pulley. Axis is not parallel will cause uneven pressure, is the early wear of teeth.

⑤ support the pulley of the rack, there must be enough rigidity, otherwise the pulley in the password lock operation will cause the two axes are not parallel.