Related terms for gears
Gear refers to a mechanical element with gears on the rim that continuously meshes to transmit movement and power. The application of gears in transmission appeared very early. With the development of production, the smoothness of gear operation has been valued.
Tooth (tooth)-each convex part of a gear used for meshing. Generally speaking, these raised portions are arranged radially. The teeth on the mating gears contact each other, resulting in continuous meshing operation of the gears.Cogging-the space between two adjacent teeth on a gear.
End surface-the plane perpendicular to the axis of the gear or worm on the cylindrical gear or cylindrical worm.
Normal surface ─ ─ On a gear, the normal surface refers to the plane perpendicular to the tooth line of the gear.
Addendum circle-the circle where the tip of the tooth is located.
Tooth root circle-the circle where the groove bottom is located.
Base circle ─ ─ A circle on which the involute generating line makes pure rolling.
Index circle ─ ─ The reference circle for calculating the geometric dimensions of the gear in the end face. For spur gears, the module and pressure angle on the index circle are both standard values.
Tooth surface-the side surface of the tooth between the cylindrical surface of the tooth tip and the cylindrical surface of the tooth root.
Tooth profile ─ ─ The cut line of the tooth surface by a specified curved surface (a plane for cylindrical gears).
Tooth line-the intersection line between the tooth surface and the indexing cylindrical surface.
End tooth pitch pt──the length of the indexing arc between the tooth profiles on the same side of two adjacent teeth.
Modulus m──The quotient obtained by dividing the tooth pitch by the pi, in millimeters.
Diameter P──The reciprocal of the modulus, measured in inches.
Tooth thickness s──the length of the indexing arc between the tooth profiles on both sides of a tooth on the end face.
Groove width e──the length of the indexing arc between the tooth profiles on both sides of a tooth groove on the end face.
Addendum height hɑ──The radial distance between the addendum circle and the index circle.
Tooth root height hf──The radial distance between the index circle and the tooth root circle.
Total tooth height h──The radial distance between the addendum circle and the root circle.
Tooth width b──The size of the tooth along the axial direction.
End face pressure angle ɑt── The acute angle between the radial line passing the intersection of the end face tooth profile and the index circle and the tangent line of the tooth profile passing that point.
Standard Rack: Only the dimensions of the base circle, tooth profile, full tooth height, crown height, and tooth thickness are all racks that conform to the standard spur gear specifications, and are cut out according to the standard gear specifications It is called the reference rack.
Standard Pitch Circle: It is used to determine the reference circle of each part of the gear. It is the number of teeth x modulus
Standard 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 bite together, each has a tangent to make a rolling circle.
Standard Pitch (Standard Pitch): The selected standard pitch is used as the benchmark, which is equal to the reference rack pitch.
Pitch Circle: The trajectory left on each gear at the occlusal contact point on the connecting center line of the two gears is called the pitch circle.
Pitch Diameter: The diameter of the pitch circle.
Effective tooth height (Working Depth): the crown height of a pair of spur gears. Also known as the working tooth height.
Addendum: The difference between the radius of the addendum circle and the pitch circle.
Backlash: The gap between the tooth surface and the tooth surface when the two teeth are engaged.
Clearance: When two teeth are engaged, the gap between the tip circle of one gear and the bottom of the other gear.
Pitch Point: The tangent point between a pair of gears and the pitch circle.
Pitch: The arc distance of the corresponding points between two adjacent teeth.
Normal Pitch: The pitch measured by the involute gear along the same vertical line of a specific section.
Transmission ratio (i): The ratio of the speed of the meshing two gears, the speed of the gear is inversely proportional to the number of teeth, generally n1 and n2 represent the speed of the two meshing teeth
Luoyang Yujie Industry &Trade Co.Ltd located in Luoyang City, one of the main heavy industrial bases in China. We specialize in the production of bearings, nonstandard machinery parts, machine tools. For the bearings, we can offer cross roller bearing, slewing bearing, YRT bearing, thin section bearing, ball screw bearing, deep groove ball bearing, etc. For the nonstandard machine parts, we can produce gears, shafts, sprockets, molds, rollers, pulley, mining machine parts, etc as per customer drawing and requirements. For the machine tools, we offer CNC vertical machine center, CNC horizontal lathe, CNC gantry boring and milling machine, CNC floor type boring, and milling machine.
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Luoyang Yujie Industry & Trade Co., Ltd.
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