CN110715030A - High-magnification high-precision planetary reducer - Google Patents

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

A high-rate and high-precision planetary reducer

technical field

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

Background technique

Mechanical transmission is one of the most classic core technologies in mechanical engineering. The mechanical transmission system is widely used in the industrial field. In almost all occasions where there is a prime mover, the mechanical transmission system needs to be used for speed change, so as to achieve the speed matching of the working machine and complete the increase in speed. Downhill torque or deceleration torque increase.

With the development of all walks of life, people have higher and higher requirements for the performance of the reducer. The existing reducer has many defects, such as large number of gears, large gear gap, low precision, and single output reduction ratio. It is urgent to develop a The new reducer has a larger transmission ratio, higher precision and can achieve simultaneous output of multiple reduction ratios to meet people's needs.

SUMMARY OF THE INVENTION

In order to overcome the above-mentioned deficiencies of the prior art, the present invention proposes a high-rate and high-precision planetary reducer, which solves the technical problems that the existing reducer has a large number of gears, low precision and can only achieve a single reduction ratio output.

The present invention is achieved through the following technical solutions:

A high-magnification and high-precision planetary reducer includes a primary reduction system and a secondary reduction system, wherein the primary reduction system includes a gear 1 fixed on an input shaft, and the gear 1 meshes with the gear 4 through the second gear; The two-stage deceleration system includes a gear 6 fixed on the output shaft 2, the gear 6 meshes with the gear 5 through the gear 3; the gear 2 and the gear 3 are connected by a planetary gear, and the planetary gear is connected by a planet carrier To the output shaft 1, the gear 5 is fixedly connected with the output shaft 3, and the output shaft 1, the output shaft 2 and the output shaft 3 are arranged coaxially.

Further, two or three planetary gears are installed on the planet carrier.

Further, the gear 4 is fixed on the casing.

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

Compared with the prior art, the beneficial effects of the present invention are:

The high-magnification and high-precision planetary reducer proposed by the present invention changes the single-shaft output into three coaxial output shafts, can realize the output of three different reduction ratios at one time, and realizes a wide range of Compared with other reducers, this reducer also has the advantages of less number of gears, small volume, less gear clearance and high precision.

Description of drawings

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

In the picture:

1, input shaft; 2, gear one; 3, gear two; 4, gear three; 5, gear four; 6, gear five; 7, gear six; 8, housing; 9, planet carrier; 10, planetary gear; 11 , output shaft one; 12, output shaft two; 13, output shaft three.

Detailed ways

The examples are shown to specifically illustrate certain embodiments of the invention and should not be construed as limiting the scope of the invention. Modifications to the present disclosure may be made simultaneously in terms of materials, methods and reaction conditions, all of which should fall within the spirit and scope of the present invention.

As shown in FIG. 1 , a high-rate and high-precision planetary reducer includes a primary reduction system and a secondary reduction system. The primary reduction system includes a gear 1 2 fixed on an input shaft 1, and the gear 1 2 Meshing with two gears 23, both of the two gears 3 are meshed with gears 45, and the gears 45 are fixed on the casing 8; the secondary reduction system includes a gear 6 7 fixed on the output shaft 212 , the gear six 7 meshes with the two gear three 4, the two gear three 4 mesh with the gear five 6; the two gear two 3 and the two gear three 4 respectively pass through the planetary gear 10 connection, the two planetary gears 10 are connected to the output shaft 1 11 through a cross-shaped planet carrier 9, and the output shaft 1 11, the output shaft 2 12 and the output shaft 3 13 are coaxially arranged.

In this 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 .

Another embodiment: there are three planetary gears 10, and there are three groups of gears 23 and 34 corresponding to each group, and the gears 23 and 34 in each group are connected by The wheel 10 is connected to the output shaft 1 through the planet carrier 9, and the structure of other parts is the same as that of the above-mentioned embodiment.

Here, the modules of gear 1, gear 2, and gear 4 are the same, and the modules of gear 3, gear 5, and gear 6 are the same; let us set gear 1 2, gear 2 3, gear 3 4, gear 4 5, gear 5 6 The radii of the index circle of the gear six 7 are a, b, c, d, e, f respectively, then the reduction ratios of the output shaft one 11, the output shaft two 12, and the output shaft three 13 of the reducer are:

Input shaft angular velocity:

Input shaft angular velocity:

Input shaft angular velocity:

The index circle radius satisfies the relational expressions d=a+2b, e=a+b+c, and f=a+b-c.

If b is close to c, the output shaft Z can achieve a large reduction ratio;

可以为负值，代表输出轴Z的转动方向与输入轴转动方向相反。Or you can combine various reduction ratios by setting a, b, c with different radii of the indexing circle, and

It can be a negative value, which means that the rotation direction of the output shaft Z is opposite to the rotation direction of the input shaft.

When gear 1 and 2 have 8 teeth, gear 2 and 3 have 100 teeth, and gear 3 and 4 have 99 teeth, the reduction ratios of output shaft 1, output shaft 2 and output shaft 3 are respectively 27 (times), (times), 5175 (times).

In summary, the use of the reducer of the present application can realize three-axis output, obtain three reduction ratios, and the number of gears is small, and a wide range of reduction ratios can be obtained by arbitrarily changing the index circle radius of gear 1, gear 2, and gear 3. Less clearance and high precision.

The above descriptions are only the embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied to other related technologies Fields are similarly included in the scope of patent protection of the present invention.

Claims (4)

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).

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