Product Introduction
Gear is a mechanical element that continuously meshes with gears on the rim to transmit motion and power. The application of gears in transmission appeared very early. At the end of the 19th century, the principle of the gear cutting method and the special machine tools and tools that used this principle to cut teeth appeared one after another. With the development of production, the stability of gear operation was paid attention to.
The Term
Tooth (teeth) - Each raised part of a gear used to mesh. Generally, these raised portions are arranged in a radial pattern. The teeth on the mating gears contact each other, resulting in a continuous meshing operation of the gears.
Cogging - The space between two adjacent teeth on a gear.
End face - a plane perpendicular to the axis of the gear or worm on a cylindrical gear or cylindrical worm.
Normal plane - On a gear, the normal plane refers to the plane perpendicular to the tooth line of the gear teeth.
Addendum Circle - The circle where the tooth tips are located.
Root circle - the circle where the groove bottom is located.
Base circle鈥攁 circle on which the occurrence line forming the involute is made pure rolling.
Index circle鈥攁 reference circle for calculating the geometric dimensions of the gear in the end face. For spur gears, the modulus and pressure angle on the index circle are standard values.
Tooth surface - the side surface of the gear tooth between the top cylindrical surface and the tooth root cylindrical surface.
Tooth Profile鈥擳he line where the tooth flank is intercepted by a specified surface (a plane for cylindrical gears).
Tooth line - the intersection of the tooth surface and the indexing cylindrical surface.
End face tooth pitch pt鈥斺€攖he indexing arc length between the tooth profiles on the same side of the adjacent two teeth.
Modulus m鈥斺€擳he quotient obtained by dividing the tooth pitch by pi, in millimeters.
Diameter P鈥攖he reciprocal of the modulus, in inches.
Tooth thickness s鈥斺€擳he length of the indexing arc between the tooth profiles on both sides of a gear tooth on the end face.
Slot width e鈥斺€擳he length of the indexing arc between the tooth profiles on both sides of a tooth slot on the end face.
Addendum height h蓱鈥斺€擳he radial distance between the addendum circle and the index circle.
Root height hf鈥斺€擳he radial distance between the index circle and the root circle.
Total tooth height h鈥斺€擳he radial distance between the tip circle and the root circle.
Tooth width b鈥斺€攖he size of the gear teeth along the axial direction.
End face pressure angle 蓱t鈹€鈹€ the acute angle formed by the radial line passing through the intersection of the end face tooth profile and the index circle and the tooth profile tangent passing through this point.
Standard Rack: Only the dimensions of the base circle, tooth shape, full tooth height, tooth crown height and tooth thickness are in line with the standard spur gear specifications, and the rack is cut according to its standard gear specifications It is called the reference rack.
Reference pitch circle: used to determine the reference circle of the size of each part of the gear. It is the number of teeth x modulus
Reference pitch line: a specific pitch line on the rack or the tooth thickness measured along this line, which is one-half of the pitch.
Action pitch circle: When a pair of spur gears mesh, each has a tangent to make a rolling circle.
Reference pitch: The selected standard pitch is used as the reference, which is equal to the reference rack pitch.
Pitch circle: The track left on each gear at the occlusal contact point on the concentric line of the two gears is called the pitch circle.
Pitch Diameter: The diameter of the pitch circle.
Effective tooth height: the sum of the crown height of a pair of spur gears. Also known as the working tooth height.
Crown height: the difference between the tip circle and the pitch circle radius.
Backlash: The clearance between the tooth surface and the tooth surface when the two teeth are engaged.
Tooth tip clearance: The gap between the tip circle of one gear and the bottom of the other gear when two teeth are engaged.
Node: The point where a pair of gears meshes with the pitch circle.
Pitch: The distance between the corresponding point arcs between two adjacent teeth.
Normal pitch: the pitch of the involute gear measured along the same vertical line of a specific section.
Transmission ratio: the ratio of the rotational speeds of the two meshing gears. The rotational speed of the gears is inversely proportional to the number of teeth. Generally, n1 and n2 represent the rotational speed of the two meshing teeth.
Product Specification
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Packing, Storage, Handling and TransportationGear and Rack suppliers
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