A dual-satellite speed reducer

Abstract

This invention relates to the field of planetary gear reducer technology, specifically a double-satellite gear reducer. The outer gear of the double planetary gear meshes with the sun gear, and the inner gears of the double planetary gears simultaneously mesh with the outer gears of adjacent double satellite gears. The outer gears of the double satellite gears also simultaneously mesh with the inner gears of adjacent double planetary gears. The inner gears of the double satellite gears mesh with a ring gear, which outputs torque. Compared to existing technologies, this invention solves the problem of excessive size in planetary gear reducers with larger speed ratios due to the increased number of stages. Within the speed ratio range of 30-150, compared to traditional planetary reducers, the size is almost unchanged while the number of meshing teeth is increased, increasing the reducer's output torque. Simultaneously, the reducer's power is further distributed, improving its structural strength. The equal meshing opportunities of each gear improve overall operational stability and accuracy, making it suitable for various industries and equipment.

Description

Technical Field

[0001] This invention relates to the field of planetary gear reducer technology, specifically a dual-satellite gear reducer. Background Technology

[0002] Dual satellite gear reducers are a widely used industrial product suitable for various mechanical equipment, including aerospace, wind power, and automobiles. They are mainly used in industrial sectors such as robot joints and machine tool rotary tables.

[0003] Traditional planetary gear reducers have relatively weak torque transmission of planetary gears. In order to improve torque transmission, the size of the reducer needs to be increased, resulting in low internal utilization. Furthermore, due to the small number of meshing gears, the planetary gears are overly complex, affecting their service life and further impacting power conversion rate, stability, and speed. This limits their application in certain fields.

[0004] Based on the above reasons, this invention designs a dual-satellite reducer, which increases the output torque by simultaneously meshing the planetary gears with the small gears of the adjacent dual-satellite gears, thereby improving the stability and accuracy of the reducer operation. At the same time, it has a higher internal space utilization rate and is more suitable for applications in different industries. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a dual-satellite reducer. By simultaneously engaging the planetary gears with the small gears of the adjacent dual-satellite gears, the output torque is increased, thereby improving the stability and accuracy of the reducer operation. At the same time, the internal space utilization is higher, making it more suitable for applications in different industries.

[0006] To achieve the above objectives, the present invention provides a dual-satellite gear reducer, comprising a housing, dual planetary gears, dual satellite gears, a gear ring, a sun gear, a pin, a first bearing, a first needle roller bearing, needle rollers, a second bearing, a second screw, a large cover plate, a first screw, a motor mount, a third bearing, a second needle roller bearing, a third screw, and a small cover plate. The housing is connected to the motor mount via the third screw to form a planetary carrier. The large cover plate is fixed to the outer ring of the second bearing, and the gear ring and the small cover plate are fixed to the inner ring of the second bearing. One end of the dual planetary gears is connected to the housing via the first needle roller bearing, and the other end of the dual planetary gears is connected to the motor mount via the second needle roller bearing. The dual satellite gears are fixed to the housing via the pin and needle rollers. The outer gear of the dual planetary gears meshes with the sun gear. The inner gears of the dual planetary gears simultaneously mesh with the outer gears of adjacent dual satellite gears, and the outer gears of the dual satellite gears simultaneously mesh with the inner gears of adjacent dual planetary gears. The inner gears of the dual satellite gears mesh with the gear ring, and the gear ring outputs torque.

[0007] The ring gear and the sun gear are on the same axis.

[0008] The double planetary gear consists of three sets, evenly distributed along the axis.

[0009] The dual satellite wheels consist of three sets, evenly distributed along the axis.

[0010] The inner diameter of a double satellite gear is larger than that of the inner diameter of a double planetary gear.

[0011] The planetary carrier, front flange, and rear connecting plate are all separate structures.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This invention addresses the issue of excessive size in planetary gear reducers with larger speed ratios due to the increased number of stages. Within the speed ratio range of 30-150, compared to traditional planetary reducers, the size is almost unchanged while the number of meshing teeth is increased, thus increasing the reducer's output torque. At the same time, the reducer's power is further distributed, improving its structural strength. The meshing opportunities of each gear are equal, thereby improving the overall operational stability and accuracy, making it suitable for various industries and equipment. Attached Figure Description

[0014] Figure 1 This is a front view of the present invention.

[0015] Figure 2 This is a schematic diagram of the AA cross-section of the present invention.

[0016] Figure 3 This is a schematic diagram of the overall transmission principle of the present invention.

[0017] Figure 4 This is a schematic diagram of the transmission principle of the first layer of the present invention.

[0018] Figure 5 This is a schematic diagram of the two-layer transmission principle of the present invention.

[0019] Figure 6 This is a three-dimensional schematic diagram of the present invention.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Chassis, 2. Double planetary gears, 3. Double satellite gears, 4. Gear ring, 5. Sun gear, 6. Pin, 7. Bearing 1, 8. Needle roller bearing 1, 9. Needle roller, 10. Bearing 2, 11. Screw 2, 12. Large cover plate, 13. Screw 1, 14. Motor mount, 15. Bearing 3, 16. Needle roller bearing 2, 17. Screw 3, 18. Small cover plate. Implementation

[0022] The present invention will now be further described with reference to the accompanying drawings.

[0023] See Figure 1-6 This invention provides a dual-satellite speed reducer:

[0024] The assembly includes a chassis 1, a double planetary gear set 2, a double satellite gear set 3, a gear ring 4, a sun gear 5, a pin 6, a bearing 7, a needle roller bearing 8, a needle roller bearing 9, a bearing 10, a screw 11, a large cover plate 12, a screw 13, a motor mount 14, a bearing 15, a needle roller bearing 16, a screw 17, and a small cover plate 18. The chassis 1 is connected to the motor mount 14 via screw 17 to form a planetary carrier. The large cover plate 12 is fixed to the outer ring of bearing 10, and the gear ring 4 and the small cover plate 18 are fixed to the inner ring of bearing 10. The double planetary gear set... One end of the double planetary gear 2 is connected to the housing 1 via a needle roller bearing 8, and the other end of the double planetary gear 2 is connected to the motor base 14 via a needle roller bearing 16. The double satellite gear 3 is fixed to the housing 1 via a pin 6 and needle rollers 9. The outer wheel of the double planetary gear 2 meshes with the sun gear 5. The inner wheel of the double planetary gear 2 meshes with the outer wheel of the adjacent double satellite gear 3 at the same time. The outer wheel of the double satellite gear 3 meshes with the inner wheel of the adjacent double planetary gear 2 at the same time. The inner wheel of the double satellite gear 3 meshes with the gear ring 4, and the gear ring 4 outputs torque to the outside.

[0025] The gear ring 4 and the sun gear 5 are on the same axis.

[0026] The double planetary gear 2 consists of three sets, evenly distributed along the axis.

[0027] The dual satellite wheels 3 consist of three groups, evenly distributed along the axis.

[0028] The inner diameter of the double satellite wheel 3 is larger than that of the inner diameter of the double planetary wheel 2.

[0029] The planetary carrier, front flange, and rear connecting plate are all separate structures.

[0030] During installation, the pin 6 and bearing 7 are first installed into the housing 1. The outer and inner wheels of the double planetary gear 2 are connected by press fitting, which is an interference fit. Before press fitting, the needle roller bearing 8 must be fitted in first. Then, the needle roller 9 and the double satellite gear 3 are installed in sequence. The two bearings 10 and the small cover plate 18 are installed onto the gear ring 4 in sequence and tightened with screw 11. Then, they are installed into the hole in the housing 1. The large cover plate 12 is covered and tightened with screw 13. The double planetary gear 2 is installed into the housing 1. An appropriate amount of grease is applied inside the housing 1. Then, the bearing 15, the snap ring, the input shaft, and the needle roller bearing 16 are installed into the hole in the motor base 14 in sequence and installed onto the gear ring 4 in sequence. They are then tightened with screw 17.

[0031] The outer wheel of the double satellite gear 3 meshes with the inner wheel of the adjacent double planetary gear 2 in the gear transmission system. The effective number of meshing teeth is twice that of the traditional planetary reducer. In this transmission system, the double satellite gear not only plays a transition role, but also plays a role in increasing torque. The meshing of the small satellite gear (inner wheel) in the double satellite gear 3 with the gear ring 4 is a relatively strong link in the torque transmission system.

[0032] Speed ​​ratio calculation formula:

[0033] The total reduction ratio is: i = Z 行大 / Z 太 ×Z 卫大 / Z 行小 ×Z 圈 / Z 卫小

[0034] Or i=D 行大 / D 太 ×D 卫大 / D 行小 ×D 圈 / D 卫小

[0035] The sun gear 5 meshes with the outer gear in the double planetary gear 2, driving the inner gear, which is coaxial (or synchronized) with the outer gear, to rotate. This results in a first reduction in speed and a second increase in torque. The inner gear in the double planetary gear 2 then meshes with the outer gear in the double satellite gear 3, resulting in a second reduction in speed and a second increase in torque. Finally, the inner gear in the double satellite gear 3 meshes with the gear ring 4, resulting in a third reduction in speed and a third increase in torque. This process is repeated three times in total.

[0036] The above are merely preferred embodiments of the present invention, intended only to aid in understanding the method and core ideas of this application. The scope of protection of the present invention is not limited to the above embodiments; all technical solutions falling within the scope of the present invention's concept are within its protection. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

[0037] This invention comprehensively solves the problems of relatively weak torque transmission in existing gear reducers, the need to increase the reducer's size to enhance torque transmission, and low internal utilization. Furthermore, the limited number of meshing gears leads to excessive complexity in the planetary gears, affecting their service life and further impacting power conversion efficiency, stability, and speed, thus limiting their application in certain fields. By simultaneously meshing the planetary gears with the small gears of adjacent double-gear sets, the output torque is increased, the load pressure on the planetary gears is reduced, and the meshing opportunities of each gear are equalized, improving the stability and accuracy of the reducer, resulting in a higher power conversion efficiency. Simultaneously, the overall size is smaller, the structure is compact and reasonable, and the space utilization is higher, making it suitable for more industries and equipment.

Claims

1. A dual-satellite speed reducer, characterized in that, The system includes a chassis (1), a double planetary gear set (2), a double satellite gear set (3), a gear ring (4), a sun gear (5), a pin (6), a bearing 1 (7), a needle roller bearing 1 (8), a needle roller (9), a bearing 2 (10), a screw 2 (11), a large cover plate (12), a screw 1 (13), a motor mount (14), a bearing 3 (15), a needle roller bearing 2 (16), a screw 3 (17), and a small cover plate (18). The chassis (1) is connected to the motor mount (14) via the screw 3 (17) to form a planetary carrier. The large cover plate (12) is fixed to the outer ring of the bearing 2 (10), and the gear ring (4) and the small cover plate (18) are fixed to the inner ring of the bearing 2 (10). The double planetary gear set (2) is connected to the sun gear set (3), a pin shaft (4), a bearing 1 (7), a needle roller bearing 1 (8), a needle roller bearing (9), a bearing 2 (10), a screw 2 (11), a large cover plate (12), a screw 1 (13), a motor mount (14), a bearing 3 (15), a needle roller bearing 2 (16), a screw 3 (17), and a small cover plate (18). 2) One end is connected to the housing (1) through the needle roller bearing (8), and the other end of the double planetary gear (2) is connected to the motor base (14) through the needle roller bearing (16). The double satellite gear (3) is fixed on the housing (1) through the pin (6) and the needle roller (9). The outer wheel of the double planetary gear (2) meshes with the sun gear (5). The inner wheel of the double planetary gear (2) meshes with the outer wheel of the adjacent double satellite gear (3) at the same time. The outer wheel of the double satellite gear (3) meshes with the inner wheel of the adjacent double planetary gear (2) at the same time. The inner wheel of the double satellite gear (3) meshes with the gear ring (4). The gear ring (4) outputs torque to the outside.

2. The dual-satellite reducer according to claim 1, characterized in that, The gear ring (4) and the sun gear (5) are on the same axis.

3. The dual-satellite speed reducer according to claim 1, characterized in that, The double planetary gears (2) are in three sets and are evenly distributed along the axis.

4. The dual-satellite speed reducer according to claim 1, characterized in that, The dual satellite wheels (3) consist of three sets and are evenly distributed along the axis.

5. The dual-satellite reducer according to claim 1, characterized in that, The inner diameter of the double satellite wheel (3) is larger than that of the inner diameter of the double planetary wheel (2).

6. The dual-satellite reducer according to claim 1, characterized in that, The planetary carrier, the front flange, and the rear connecting plate are all separate structures.

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