Gear is the essential element in machinery and equipment. In order to cater to the needs of machinery production, produce all kinds of gear manufacturing, in order to meet the market demand, has the cycloidal gear, the involute gear, the circular arc gear they each have advantages and disadvantages, such as the laser laser equipment factory, for you in China.




advantage: the concave and convex profile meshing and contact stress is small, sliding force is small, wear small, no root cutting phenomenon, the minimum gear is less.
faults: compatibility is poor, can't meet ratio transmission center distance changes, as the power is passed laws force Fn changes continuously, the size of the bearing force and direction is also changing, affect the balance of a drive.


advantages: simple manufacturing, center distance separability, Fn a constant normal force.
weakness: when using external meshing gear transmission, small curvature radius, low bearing capacity, to improve the bearing capacity, the need to increase gear diameter or width. Often, therefore, take the following measures: 1. Using alloy steel, carburizing and quenching, grinding, in order to improve the material allowable contact stress; 2. With large deflection, and improve the comprehensive radius of curvature, in order to improve the bearing capacity.


advantage: the concave and convex profile contact, synthetic curvature radius, the contact stress is small, high bearing capacity.
disadvantages: 1. No transverse contact ratio, axial contact ratio can rely on continuous transmission, the tooth width is bigger, can only make a helical gear, cannot be made straight gear; 2. No separability, when the centre distance change and a processing error, bearing load capacity will decline; 3. Processing and manufacturing needs special hob, cutting tool is more expensive, promotion is not convenient, grinding is difficult, can only be used in the soft hard tooth surface of tooth surface and the occasion.


advantage: the concave and convex tooth profile of contact wire mesh, carrying capacity is big.
faults: need special parabolic gear hob, promotion by certain restrictions.


advantage: the concave and convex profile contact, the contact stress is small, large carrying capacity.
faults: manufacturing, size measurement and control, it is difficult to promote also.


from the above, to make the new tooth form get the popularization and application, must meet the following conditions:
( 1) Simple tools manufacture, or use of the existing gear cutting tools, such as using involute gear hob processing gear on gear hobbing machine;
( 2) A pair of gear tooth profile should be concave and convex profile contact, to reduce the contact stress, improve the bearing capacity;
( 3) Manufacturing, easy to measure, and gear transmission center distance separability, Fn a constant normal force;


comprehensive involute gear processing is convenient, has high separability and circular arc gear bearing capacity, the advantages of point, line meshing gear transmission. It is a kind of with characteristics of line meshing properties and a little meshing gear transmission. The pinion is a short deflection involute gear, big gear outline for upper convex tooth profile involute, lower concave tooth profile for transition curve, the size of the gears meshing with each other, both the contact wire mesh for straight line, and there is concave and convex meshing tooth profile of contact point, so called dotted line meshing gear transmission.

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