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A gear coupling is a mechanical device for transmitting torque between two shafts that are not collinear. It consists of a flexible joint fixed to each shaft. The two joints are connected by a third shaft, called the spindle.
Each joint consists of a 1:1 gear ratio internal/external gear pair. The tooth flanks and outer diameter of the external gear are crowned to allow for angular displacement between the two gears. Mechanically, the gears are equivalent to rotating splines with modified profiles. They are called gears because of the relatively large size of the teeth.
Gear couplings and universal joints are used in similar applications. Gear couplings have higher torque densities than universal joints designed to fit a given space while universal joints induce lower vibrations. The limit on torque density in universal joints is due to the limited cross sections of the cross and yoke. The gear teeth in a gear coupling have high backlash to allow for angular misalignment. The excess backlash can contribute to vibration.
Gear couplings are generally limited to angular misalignments, i.e., the angle of the spindle relative to the axes of the connected shafts, of 4-5°. Universal joints are capable of higher misalignments.Advantages of Tanso gear coupling1.Lowest price based on large scale production.2.High and stable quality level.3.Widely used in various mechanical and hydraulic fields.4.Compensation for axial, radial and angular misalignment.5.Convenient axial plugging assembly.6.No brittlement at low temperature.7.Good slippery and frictional properties.8.Resistance to chemical corrosion.9.Rich experience working with big companies in this field.Nylon gear flexible coupling is the latest product,it has been using by abroad,and it is designed by mechanical committee of Jinan Casting forging machinery institute.Features of NL gear coupling:1.Absorb parallel,angular and axial misalignments2.Simple assembly and disassembly3.Easy maintenance and low noise4.High tansmission efficiency5.Long service life
Type
Nominal torqueTn (N.M)
Max speedn (r/min)
Fundamental dimensions (mm)
Max misalignment
Moment of inertia(KgC m 2 )
Mass(Kg )
Bore diameterd1 d2
Bore lengthL 1 L 2
L
D
D1
D2
E
L3
Axial
(mm)
Parallel
(mm)
Angular
α°
NL1
40
6000
6 8 10
16 20
25 32
37 45
55 69
40
26
4
34
2
±0.3
1°
0.25
0.85
12 14
NL2
100
6000
10 12 14 22
25 32
42 52
57 71
91 111
42
36
4
40
2
±0.4
1°
0.92
1.7
16 18 20 24
NL3
160
6000
20 22 24
52 62
113
133
66
44
4
46
2
±0.4
1°
3.10
2.6
25 28
NL4
250
6000
28 30 32
62 82
129
169
83
58
4
48
2
±0.4
1°
8.69
3.6
35 38