CN110715030A

CN110715030A - High-magnification high-precision planetary reducer

Info

Publication number: CN110715030A
Application number: CN201910891469.1A
Authority: CN
Inventors: 倪举鹏
Original assignee: Ezhou Institute of Industrial Technology Huazhong University of Science and Technology
Current assignee: Ezhou Institute of Industrial Technology Huazhong University of Science and Technology
Priority date: 2019-09-20
Filing date: 2019-09-20
Publication date: 2020-01-21

Abstract

The invention relates to a high-magnification high-precision planetary reducer which comprises a primary reduction system and a secondary reduction system, wherein the primary reduction system comprises a first gear fixed on an input shaft, and the first gear is meshed with a fourth gear through a second gear; the second-stage speed reducing system comprises a gear six fixed on the output shaft II, and the gear six is meshed with a gear five through a gear three; the second gear is connected with the third gear through a planet wheel, the planet wheel is connected to the first output shaft through a planet carrier, the fifth gear is fixedly connected with the third output shaft, and the first output shaft, the second output shaft and the third output shaft are coaxially arranged. The high-magnification high-precision planetary reducer provided by the invention has the advantages that three output shafts can simultaneously obtain three different reduction ratios, and compared with other reducers, the reducer also has the advantages of small number of gears, small volume, small gear clearance and high precision.

Description

High-magnification high-precision planetary reducer

Technical Field

The invention relates to the technical field of speed reducers, in particular to a high-magnification high-precision planetary speed reducer.

Background

Mechanical transmission is one of the most classical core technologies of mechanical engineering subjects, a mechanical transmission system is widely applied in the industrial field, and the mechanical transmission system is almost needed to be used for speed change in all occasions with prime movers, so that speed matching of a working machine is realized, and speed-up torque reduction or speed-down torque increase is completed.

Along with the development of various industries, people have higher and higher performance requirements on the speed reducer, the existing speed reducer has the defects of large number of gears, large gear clearance, low precision, single output reduction ratio and the like, and a new speed reducer is urgently needed to be developed, has larger transmission ratio and higher precision, can realize simultaneous output of multiple reduction ratios, and meets the requirements of people.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides a high-magnification high-precision planetary reducer, which solves the technical problems that the conventional reducer has a large number of gears and low precision and can only realize single reduction ratio output.

The invention is realized by the following technical scheme:

a high-magnification high-precision planetary reducer comprises a primary reduction system and a secondary reduction system, wherein the primary reduction system comprises a first gear fixed on an input shaft, and the first gear is meshed with a fourth gear through a second gear; the two-stage speed reducing system comprises a gear six fixed on a second output shaft, and the gear six is meshed with a gear five through a gear three; the second gear is connected with the third gear through a planet wheel, the planet wheel is connected to the first output shaft through a planet carrier, the fifth gear is fixedly connected with the third output shaft, and the first output shaft, the second output shaft and the third output shaft are coaxially arranged.

Furthermore, two or three planet wheels are arranged on the planet carrier.

Further, the gear four is fixed on the shell.

Furthermore, the rotary axes of the first output shaft, the second output shaft and the third output shaft are collinear with the rotary axis of the input shaft.

Compared with the prior art, the invention has the beneficial effects that:

the high-magnification high-precision planetary reducer provided by the invention has the advantages that the single-shaft output is changed into the three coaxial output shafts, the output with three different reduction ratios can be realized at one time, the reduction ratio in a large range is realized by utilizing the first-stage reduction and the second-stage reduction, and compared with other reducers, the reducer also has the advantages of small number of gears, small size, small gear clearance and high precision.

Drawings

Fig. 1 is a structural schematic diagram of a high-magnification high-precision planetary reducer according to an embodiment of the invention.

In the figure:

1. an input shaft; 2. a first gear; 3. a second gear; 4. a third gear; 5. a fourth gear; 6. a fifth gear; 7. a sixth gear; 8. a housing; 9. a planet carrier; 10. a planet wheel; 11. a first output shaft; 12. a second output shaft; 13. and a third output shaft.

Detailed Description

The following examples are presented to illustrate certain embodiments of the invention in particular and should not be construed as limiting the scope of the invention. The present disclosure may be modified from materials, methods, and reaction conditions at the same time, and all such modifications are intended to be within the spirit and scope of the present invention.

As shown in fig. 1, a high-magnification high-precision planetary reducer comprises a primary reduction system and a secondary reduction system, wherein the primary reduction system comprises a first gear 2 fixed on an input shaft 1, the first gear 2 is meshed with two second gears 3, both the two second gears 3 are meshed with a fourth gear 5, and the fourth gear 5 is fixed on a shell 8; the two-stage speed reducing system comprises a gear six 7 fixed on a second output shaft 12, the gear six 7 is meshed with two gears three 4, and the two gears three 4 are meshed with a gear five 6; the two second gears 3 and the two third gears 4 are connected through planet wheels 10 respectively, the two planet wheels 10 are connected to a first output shaft 11 through a cross planet carrier 9, and the first output shaft 11, the second output shaft 12 and the third output shaft 13 are coaxially arranged.

In the present embodiment, the rotation axes of the first output shaft 11, the second output shaft 12 and the third output shaft 13 are collinear with the rotation axis of the input shaft 1.

In another embodiment: three planet wheels 10 are provided, three groups of gears two 3 and three groups of gears three 4 are correspondingly provided, each group of gears two 3 and three groups of gears 4 are connected through the planet wheels 10, the three planet wheels 10 are connected to the first output shaft through the planet carrier 9, and the structures of other parts are the same as those of the above embodiment.

The module numbers of the first gear, the second gear and the fourth gear are the same, and the module numbers of the third gear, the fifth gear and the sixth gear are the same; if the reference circle radii of the first gear 2, the second gear 3, the third gear 4, the fourth gear 5, the fifth gear 6 and the sixth gear 7 are a, b, c, d, e and f, respectively, the reduction ratios of the first output shaft 11, the second output shaft 12 and the third output shaft 13 of the speed reducer are:

input shaft angular velocity:

input shaft angular velocity:

input shaft angular velocity:

the reference circle radius satisfies the relation d ═ a +2b, e ═ a + b + c, and f ═ a + b-c.

B is set to be approximately equal to c, and the output shaft Z can achieve a large reduction ratio;

or various reduction ratios can be combined by only setting a, b and c with different reference circle radiuses, and

and may be negative, indicating that the output shaft Z is rotating in the opposite direction to the input shaft.

When the first gear 2 is 8 teeth, the second gear 3 is 100 teeth, the third gear 4 is 99 teeth, and the reduction ratios of the first output shaft, the second output shaft and the third output shaft are respectively 27 (times),(multiple), 5175 (multiple).

In summary, the reducer can achieve three-axis output, three reduction ratios are obtained, the number of gears is small, the reduction ratios in a large range can be obtained by randomly changing the reference circle radiuses of the first gear, the second gear and the third gear, gear gaps are small, and precision is high.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A high-magnification high-precision planetary reducer comprises a primary speed reducing system and a secondary speed reducing system, and is characterized in that the primary speed reducing system comprises a first gear (2) fixed on an input shaft (1), and the first gear (2) is meshed with a fourth gear (5) through a second gear (3); the two-stage speed reducing system comprises a gear six (7) fixed on a second output shaft (12), and the gear six (7) is meshed with a gear five (6) through a gear three (4); the second gear (3) is connected with the third gear (4) through a planet wheel (10), the planet wheel (10) is connected to the first output shaft (11) through a planet carrier (9), the fifth gear (6) is fixedly connected with the third output shaft (13), and the first output shaft (11), the second output shaft (12) and the third output shaft (13) are coaxially arranged.

2. A high-magnification high-precision planetary reducer according to claim 1, characterized in that two or three planet wheels (10) are mounted on the planet carrier (9).

3. A high-magnification high-precision planetary reducer according to claim 1, wherein the gear four (5) is fixed to the housing (8).

4. A high-rate high-precision planetary reducer according to claim 1, wherein the rotation axes of the first output shaft (11), the second output shaft (12) and the third output shaft (13) are collinear with the rotation axis of the input shaft (1).