Jinan factory direct Pulley motor pulley aluminum wheels 5M-20Z-30BF quality and price ..

Arc tooth belt Arc tooth Timing tooth sprocket groove depth hg pitch pb gullet gullet arc radius R addendum circle r1 half-space width s double zenith distance 2δ section profile angle 3M 3 1.28 0.91 0.26 ~ 0.35 1.90 0.762 ≈14 ° 5M 5 2.16 1.56 0.48 ~ 0.52 3.25 1.144 ≈14 ° 8M 8 3.54 2.57 0.78 ~ 0.84 5.35 1.372 ≈14 ° 14M 14 6.20 4.65 1.36 ~ 1.50 9.80 2.794 ≈14 ° 20M 20 8.60 6.84 1.95 ~ 2.25 14.80 4.320 ≈14 ° straight edge tooth profile size Dimension of linear type pulley models MXL XXL XL LH XH XXH gullet bottom width bw 0.84 ± 0.05 1.14 ± 0.05 1.32 ± 0.05 3.05 ± 0.10 4.19 ± 0.13 7.90 ± 0.15 12.17 ± 0.18 gullet Deep hg 0.69 0 0.84 0 1.65 0 2.67 0 3.05 0 7.14 0 10.31 0 -0.05 -0.05 -0.08 -0.10 -0.13 -0.13 -0.13 gullet half-Φ + 1.5 ° 20 25 25 20 20 20 20 tooth root fillet radius rb 0.35 0.35 0.41 1.19 1.60 1.98 3.96 tip radius rt 0.13 +0.05 0.30 +0.05 0.64 +0.05 1.17 +0.13 1.60 +0.13 2.39 +0.13 3.18 +0.13 0 0 0 0 0 0 0 double top section away from the 2β 0.508 0.508 0.508 0.762 1.372 2.794 3.048 arc gear types: 1) circular cylindrical gear sub-single and double circular arc gear gear. 2) single-arc gear contact line intensity ratio under the same conditions involute gear high, but lower than the bending strength of involute. 3) arc gear mainly soft tooth surface or hardened, usually with low when using hardened tooth. Arc gear design steps: 1) simplify the design: gear drive transmission power, input speed, gear ratio and other conditions, to determine the center distance, modulus and other key parameters. If the center distance modulus known, you can skip this step. 2) The geometric design calculations: basic gear design and calculation parameters and geometry calculations. 3) Strength Check: After determining the basic parameters, accurate contact strength of tooth surface and tooth root bending strength check. 4) If the check does not meet the strength requirements, it can be returned Arc gear transmission characteristics: 1) pilot arc Gear meshing transmission, value applicable to helical gears, spur gears can not be used. 2) relative to the radius of curvature than involute line, contact strength than the involute. 3) sensitivity to changes in center distance is greater than the involute. When Processing, Cutting depth requirements for higher radial displacement does not allow cutting, and careful control of assembly error. Working single-arc tooth pinion gear tooth profile outside the pitch, tooth profile center on the pitch circle; large concave tooth gear tooth profile in the pitch circle, tooth profile a bit outside the center of the pitch circle (Fig. 2 single-arc Gear meshing). Since the tooth profile radius p1 gear tooth profile arc radius p2 slightly larger than the pinion, so when two K tooth profile to the point, its normal line through the node c, the tooth will contact immediately separated, but adjacent to it The other end of the tooth profile immediately contacted, or two teeth K1 ﹑ K'1, K2 K3 ﹑ ﹑ ﹑ K'2 K'3 ...... various points along the engagement line contact in turn. Therefore, the arc gear ﹑ concave end face lobe profile only for instantaneous meshing. A new circular gear in meshing theory is instantaneous point, it Arc Gear also often called point arc meshing gear. After a run-in teeth, tooth profile can actually high gear along quite a long period of exposure. Arc gear transmission characteristics: (1) Comprehensive radius of curvature than involute gear is much larger, the contact strength of 0.5 to 1.5 times higher than the involute gear about; (2) two teeth meshing line along a direction rolling great speed, easy to form a film between the tooth surface, high transmission efficiency, generally ranging from 0.99 to 0.995; (3) arc gear tooth direction along wear uniform, and easy to run together; (4) arc gear rootless cut phenomenon, so the minimum number of teeth less. But arc gear on the center distance ﹑ Cutting helix angle error sensitivity and great depth, the larger of the three errors on carrying capacity, so arc gear on the manufacture and installation of high precision. In addition, single-arc Gear bending strength is weak; modulus of the same cutting large and small gear, preparing two different hob. When the double arc gear work, from one end, the recess first driven initiative promoting tooth tooth protrusion, left, then push the other side of its protruding portion of the recess, so double arc Gear, in theory At the same time there are two points of contact, the running-in, this drive actually has two lines of contact, so you can achieve more and more of teeth meshing point. In addition, since the thickness of the tooth root is large, not only double arc gear transmission capacity than single-gear transmission arc about 30% higher, and drive more stable, less vibration and noise, and the same can be paired hobbing The two gears. Therefore. When the high-speed heavy, double arc Gear replace single-arc Gear trend