Robot Joints Harmonic Drive

Harmonic Drive Reducer Shaft Type model SHF-S-14 / SHF-S-17 / SHF-S -20 / SHF-S -25 / SHF-S-32. SHF-S type is the shaft type of GIGAGER harmonic gear series. The principle of GIGAGER harmonic gear reduction is to use the relative motion of the Flexspline, Circular Spline and the wave generator,...
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Product Details

Harmonic Drive Reducer Shaft Type model SHF-S-14 / SHF-S-17 / SHF-S -20 / SHF-S -25 / SHF-S-32. SHF-S type is the shaft type of GIGAGER harmonic gear series. The principle of GIGAGER harmonic gear reduction is to use the relative motion of the Flexspline, Circular Spline and the wave generator, mainly the controllable elastic deformation of the flexspline to realize the motion and power transmission.


1. What is the Product Features of GIGAGER Harmonic Drive?

• High cost performance

• High efficiency

• Low backlash

• High rigidity


2. SHF Shaft Series Harmonic Drive

Series

Type

Spec

Gear Ratio

SHF

S ( Shaft )

14

30

50

80

100

-

-

17305080100-
-
20305080100120
-
25305080100120
160
325080100120-
-

For more series CSF, SHD, CSD, please see the attached Catalogue. (download the PDF in this page)

 

Model : SHF-S-14

image001

Items

Gear Ratio
30K50K80K
100K

Rated Torque ( Input 2000r/min )

N.m

3.8

5.1

7.4

7.4

Permissible Maximum Torque (Start • Stop )

N.m

8.6

17

22

27

Permissible Maximum Value of Average Load Torque

N.m

7.8

6.6

10.5

10.5

Instantaneous Permissible Maximum Torque

N.m

16

33

45

51

Permissible Maximum Input Rotating Speed

r/min

8000

8000

8000

8000

Permissible Average Input Rotating Speed

r/min

3500

3500

3500

3500

Backlash

Arc sec

≦ 20

≦ 20

≦ 10

≦ 10

Designed Lifespan

hour

10000

10000

15000

15000


Model : SHF-S-17

image003

Items

Gear Ratio
30K50K80K
100K

Rated Torque ( Input 2000r/min )

N.m

8.4

15.2

21

23

Permissible Maximum Torque (Start • Stop )

N.m

15.2

32

41

52

Permissible Maximum Value of Average Load Torque

N.m

11.5

25

26

38

Instantaneous Permissible Maximum Torque

N.m

29

66

83

108

Permissible Maximum Input Rotating Speed

r/min

7000

7000

7000

7000

Permissible Average Input Rotating Speed

r/min

3500

3500

3500

3500

Backlash

Arc sec

≦ 20

≦ 20

≦ 10

≦ 10

Designed Lifespan

hour

10000

10000

15000

10000


Model : SHF-S-20

image005

Items

Gear Ratio
30K50K80K100K
120K

Rated Torque ( Input 2000r/min )

N.m

14

24

32

38

38

Permissible Maximum Torque (Start • Stop )

N.m

26

53

70

78

83

Permissible Maximum Value of Average Load Torque

N.m

19

32

45

47

47

Instantaneous Permissible Maximum Torque

N.m

48

93

121

140

140

Permissible Maximum Input Rotating Speed

r/min

6000

6000

6000

6000

6000

Permissible Average Input Rotating Speed

r/min

3500

3500

3500

3500

3500

Backlash

Arc sec

≦ 20

≦ 20

≦ 10

≦ 10

≦ 10

Designed Lifespan

hour

10000

10000

15000

15000

15000


Model : SHF-S-25

image007

Items


Gear Ratio
30K50K80K100K120K
160K

Rated Torque ( Input 2000r/min )

N.m

26

37

60

64

64

64

Permissible Maximum Torque (Start • Stop )

N.m

48

93

130

149

159

167

Permissible Maximum Value of Average Load Torque

N.m

36

52

83

103

103

103

Instantaneous Permissible Maximum Torque

N.m

90

177

242

270

289

298

Permissible Maximum Input Rotating Speed

r/min

5500

5500

5500

5500

5500

5500

Permissible Average Input Rotating Speed

r/min

3500

3500

3500

3500

3500

3500

Backlash

Arc sec

≦ 20

≦ 20

≦ 10

≦ 10

≦ 10

≦ 10

Designed Lifespan

hour

10000

10000

15000

15000

15000

15000


Model : SHF-S-32

image009

Items

Gear Ratio
50K80K100K
120K

Rated Torque ( Input 2000r/min )

N.m

72

112

130

130

Permissible Maximum Torque (Start • Stop )

N.m

205

289

325

335

Permissible Maximum Value of Average Load Torque

N.m

103

159

208

205

Instantaneous Permissible Maximum Torque

N.m

363

540

635

652

Permissible Maximum Input Rotating Speed

r/min

4500

4500

4500

4500

Permissible Average Input Rotating Speed

r/min

3500

3500

3500

3500

Backlash

Arc sec

≦ 20

≦ 10

≦ 10

≦ 10

Designed Lifespan

hour

10000

15000

15000

15000


3. Why choose GIGAGER?


4. Related Knowledge

Mechanic of Harmonic Drive

The strain wave gearing theory is based on elastic dynamics and utilizes the flexibility of metal. The mechanism has three basic components: a wave generator (2 / green), a flex spline (3 / red), and a circular spline (4 / blue). More complex versions have a fourth component normally used to shorten the overall length or to increase the gear reduction within a smaller diameter, but still follow the same basic principles.

The wave generator is made up of two separate parts: an elliptical disk called a wave generator plug and an outer ball bearing. The gear plug is inserted into the bearing, giving the bearing an elliptical shape as well.

The flex spline is shaped like a shallow cup. The sides of the spline are very thin, but the bottom is relatively rigid. This results in significant flexibility of the walls at the open end due to the thin wall, and in the closed side being quite rigid and able to be tightly secured (to a shaft, for example). Teeth are positioned radially around the outside of the flex spline. The flex spline fits tightly over the wave generator, so that when the wave generator plug is rotated, the flex spline deforms to the shape of a rotating ellipse and does not slip over the outer elliptical ring of the ball bearing. The ball bearing lets the flex spline rotate independently to the wave generator's shaft.

The circular spline is a rigid circular ring with teeth on the inside. The flex spline and wave generator are placed inside the circular spline, meshing the teeth of the flex spline and the circular spline. Because the flex spline is deformed into an elliptical shape, its teeth only actually mesh with the teeth of the circular spline in two regions on opposite sides of the flex spline (located on the major axis of the ellipse).

Assume that the wave generator is the input rotation. As the wave generator plug rotates, the flex spline teeth which are meshed with those of the circular spline slowly change position. The major axis of the flex spline's ellipse rotates with wave generator, so the points where the teeth mesh revolve around the center point at the same rate as the wave generator's shaft. The key to the design of the strain wave gear is that there are fewer teeth (often for example two fewer) on the flex spline than there are on the circular spline. This means that for every full rotation of the wave generator, the flex spline would be required to rotate a slight amount (two teeth in this example) backward relative to the circular spline. Thus the rotation action of the wave generator results in a much slower rotation of the flex spline in the opposite direction.

For a strain wave gearing mechanism, the gearing reduction ratio can be calculated from the number of teeth on each gear:

image019

For example, if there are 202 teeth on the circular spline and 200 on the flex spline, the reduction ratio is (200 − 202)/200 = −0.01

Thus the flex spline spins at 1/100 the speed of the wave generator plug and in the opposite direction. Different reduction ratios are set by changing the number of teeth. This can either be achieved by changing the mechanism's diameter or by changing the size of the individual teeth and thereby preserving its size and weight. The range of possible gear ratios is limited by tooth size limits for a given configuration.


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