CN223708469U - Speed adjusting device for composite planetary gear - Google Patents
Speed adjusting device for composite planetary gearInfo
- Publication number
- CN223708469U CN223708469U CN202520646634.8U CN202520646634U CN223708469U CN 223708469 U CN223708469 U CN 223708469U CN 202520646634 U CN202520646634 U CN 202520646634U CN 223708469 U CN223708469 U CN 223708469U
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- gear
- assembly
- friction transmission
- planetary gear
- planetary
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Abstract
本实用新型提出了一种复合式行星齿轮速度调节装置，包括：安装组件、太阳轮组件、行星轮组件和法兰，安装组件用于安装太阳轮组件和行星轮组件，法兰的内侧通过行星轮组件与太阳轮组件传动连接；行星轮组件具有第一齿轮部和第一摩擦传动部；太阳轮组件具有第二齿轮部和第二摩擦传动部；第一齿轮部与第二齿轮部啮合装配，第二摩擦传动部与第一摩擦传动部之间摩擦传动连接，第一摩擦传动部与法兰之间摩擦传动连接。能够显著提高速度调节装置的性能，本方案中的速度调节装置具有过载保护、回差小、传递力矩大和使用寿命高的优点。
This invention proposes a composite planetary gear speed regulating device, comprising: a mounting assembly, a sun gear assembly, a planetary gear assembly, and a flange. The mounting assembly is used to mount the sun gear assembly and the planetary gear assembly. The inner side of the flange is connected to the sun gear assembly via the planetary gear assembly. The planetary gear assembly has a first gear section and a first friction transmission section. The sun gear assembly has a second gear section and a second friction transmission section. The first gear section and the second gear section are meshed and assembled. The second friction transmission section is connected to the first friction transmission section via friction transmission. The first friction transmission section is connected to the flange via friction transmission. This invention can significantly improve the performance of the speed regulating device. The speed regulating device in this solution has the advantages of overload protection, low hysteresis, large transmission torque, and long service life.
Description
Technical Field
The utility model relates to a planetary gear, in particular to a compound planetary gear speed adjusting device.
Background
A friction reducer is a transmission device that transmits motion or power using friction. Because the motion or power is transmitted only through friction instead of gear teeth, the friction speed reducer has the characteristics of low noise, zero backlash and the like compared with a gear speed reducer, and more importantly, the friction speed reducer has the characteristic of overload protection.
For friction reducers, it is critical whether or not sufficient normal force can be generated at the contact surface, and some patents, such as patent JP2005264969a, specifically design a complex planet carrier in order to generate sufficient friction between the planetary rollers and the sun shaft and the stationary rolling ring, resulting in increased volume, weight and cost.
As another example, patent DE19951988B4 invented a single-stage toothless planetary reducer which is less in transmission and lower in output torque, and because the toothless planetary gear uses a bearing to cooperate with the planetary carrier, the bearing is easily damaged when the toothless planetary gear is extruded. Therefore, the friction speed reducer at present mainly has the problems of complex structure, low transmission torque and easy extrusion loss.
Therefore, a new structure is required to improve the performance of the speed reducer.
Disclosure of utility model
In order to solve the technical problems, the utility model provides a compound planetary gear speed adjusting device which can obviously improve the performance of the speed adjusting device.
The utility model particularly provides a compound planetary gear speed adjusting device which comprises a mounting assembly, a sun gear assembly, a planetary gear assembly and a flange, wherein the mounting assembly is used for mounting the sun gear assembly and the planetary gear assembly, and the inner side of the flange is in transmission connection with the sun gear assembly through the planetary gear assembly;
the planetary gear assembly is provided with a first gear part and a first friction transmission part;
The sun gear assembly is provided with a second gear part and a second friction transmission part;
The first gear part is meshed and assembled with the second gear part, the second friction transmission part is in friction transmission connection with the first friction transmission part, and the first friction transmission part is in friction transmission connection with the flange.
Preferably, the first friction transmission part is cylindrical, and the first friction transmission part has a hollow structure.
Preferably, the first friction transmission part and the first gear part are integrally formed.
Preferably, the thickness of the side wall of the first gear part is greater than the thickness of the side wall of the first friction transmission part.
Preferably, the number of the planetary gear assemblies is not less than three, and each of the planetary gear assemblies has a planetary shaft on which the first gear portion is mounted by a first bearing.
Preferably, the two first gear parts are located at both ends of the first friction transmission part in the axial direction, or the two first friction transmission parts are located at both ends of the first gear part in the axial direction.
Preferably, the sun gear assembly is further provided with a cylinder, the second gear part is coaxially fixed on the cylinder, the second friction transmission part is cylindrical, and the second friction transmission part is sleeved on the cylinder.
Preferably, the second friction transmission part is in clearance fit with the cylinder.
Preferably, the mounting assembly includes a first planet carrier, a second planet carrier and an inner race assembly,
The first planet carrier and the second planet carrier are respectively arranged in the inner ring assembly through second bearings;
the sun gear assembly is respectively and rotatably connected with the first planet carrier and the second planet carrier;
two ends of a planetary shaft of the planetary gear assembly are respectively and fixedly connected with the first planetary support and the second planetary support;
The flange and the inner ring assembly are coaxially arranged.
Preferably, the flange is rotatably connected with the inner ring assembly through a fourth bearing;
The inner ring assembly comprises a plurality of inner rings, and a third gear part used for meshing the first gear part is arranged on the inner rings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings used in the description of the embodiments or the prior art will be briefly described below.
Fig. 1 is a schematic perspective view of a speed adjusting device for a compound planetary gear set forth in the present embodiment;
fig. 2 is a schematic diagram of the internal structure of the compound planetary gear speed adjusting device in the present embodiment;
Fig. 3 is a front view of the compound planetary gear speed adjustment device proposed in the present embodiment;
FIG. 4 is a cross-sectional view taken along the direction A-A in FIG. 3;
FIG. 5 is a cross-sectional view taken in the direction B-B in FIG. 3;
Fig. 6 is a front view of the planetary gear assembly in the present embodiment;
FIG. 7 is a schematic cross-sectional view of the structure of FIG. 6 in the direction C-C;
fig. 8 is a front view of the sun gear assembly in the present embodiment;
fig. 9 is a schematic sectional view of the structure of fig. 8 in the direction D-D.
Wherein reference numerals are as follows:
11-mounting assembly, 12-sun gear assembly, 13-planet wheel assembly, 14-flange, 15-first gear part, 16-first friction transmission part, 17-second gear part, 18-second friction transmission part, 19-hollow structure, 20-planet shaft, 21-first bearing, 22-cylinder, 23-first planet carrier, 24-second planet carrier, 25-inner ring, 26-fourth bearing, 27-third gear part, 28-second bearing and 29-third bearing.
Detailed Description
The technical scheme of the present application will be further described with reference to specific examples, but the present application is not limited to these examples.
As shown in fig. 1 to 9, the present embodiment proposes a compound planetary gear speed adjusting device, which includes a mounting assembly 11, a sun gear assembly 12, a planetary gear assembly 13, and a flange 14, wherein the mounting assembly 11 is used for mounting the sun gear assembly 12 and the planetary gear assembly 13, and the inner side of the flange 14 is in transmission connection with the sun gear assembly 12 through the planetary gear assembly 13;
The planet wheel assembly 13 has a first gear portion 15 and a first friction drive portion 16;
the sun gear assembly 12 has a second gear portion 17 and a second friction drive portion 18;
The first gear part 15 is meshed with the second gear part 17, the second friction transmission part 18 is in friction transmission connection with the first friction transmission part 16, and the first friction transmission part 16 is in friction transmission connection with the flange 14.
The technical effect of the scheme is that the performance of the speed adjusting device can be obviously improved, the speed adjusting device in the scheme has the advantages of overload protection, small return difference, large transmission torque and long service life, and the specific performance improvement principle is as follows:
The principle of overload protection is that the power transmission is realized by adopting a gear engagement and friction engagement combined transmission mode in the scheme, and because the flange 14 and the first friction transmission part 16 adopt a friction engagement assembly relationship, the overload protection purpose is effectively achieved, the overload protection control module for system development is avoided, and the weight, the volume and the production cost of the system can be effectively reduced. The flange 14 in this embodiment is used for mounting an output shaft or an input shaft by a connection structure. In addition, the technical term friction engagement in this scheme means that power transmission is achieved by friction.
The principle of small return difference is that in order to realize larger transmission ratio, gears in the prior art are designed into multiple stages, and the gap effect of the gears is also overlapped due to the superposition of the gears in multiple stages, so that larger return difference exists in the prior art, and the transmission precision is reduced. The transmission mode of two stages of gear engagement and friction engagement is adopted in the scheme, the transmission ratio of 1000:1 can be realized, the transmission mode has the advantage of few series progression, and return difference can be obviously reduced under the double effects of friction transmission and gear engagement transmission in the scheme.
The principle of large transmission torque is that the friction transmission realizes motion and power transmission through the pressing force, and compared with the friction transmission with the same volume as the gear transmission, the transmission torque of the friction transmission is smaller, and the gear engagement technical scheme is adopted at the stage of the gear engagement-friction compound planetary reducer, so that the transmission torque can be obviously increased.
The principle of long service life is that the friction transmission in the prior art realizes the transmission of motion or power through the pressing force, and the parts, especially the bearings, of the friction transmission have great pretightening force, so that the service life is insufficient. In the scheme, a gear engagement-friction compound scheme is adopted, a gear engagement and friction transmission combined technical scheme is adopted, and a bearing is not required to be arranged at the friction transmission position, so that the service life of the device is prolonged.
As an implementation of the present embodiment, as shown in fig. 6 and 7, the first friction transmission portion 16 is cylindrical, and the first friction transmission portion 16 has a hollow structure 19.
The technical effects of the scheme are that the cylindrical shell used for enabling the first friction transmission part 16 to deform more easily and enabling the friction contact surfaces to be tightly attached, so that the transmission of motion and power is facilitated, the planet wheel assembly 13 is made of alloy steel with high rigidity, and the planet wheel assembly is used for enabling the first friction transmission part 16 to be easily pressed by the second friction transmission part 18 and the flange 14, so that enough friction force is generated, and further the rotation motion of the sun wheel assembly 12 is transmitted to the output shaft of the flange 14.
As an implementation manner of this embodiment, the first friction transmission portion 16 and the first gear portion 15 are integrally formed, and alloy steel with high rigidity is adopted.
Further, the sidewall thickness of the first gear portion 15 is greater than the sidewall thickness of the first friction transmission portion 16. The technical effect of the scheme is that the first friction transmission part 16 is more easily compressed and deformed, the first gear part 15 is not easily compressed and deformed, and the transmission performance can be remarkably improved.
Further, the planetary gear assembly 13 has a planetary shaft 20, and the first gear portion 15 is mounted on the planetary shaft 20 through a first bearing 21. Wherein the first bearing 21 is a deep groove ball bearing.
In this solution, the number of planetary gear assemblies 13 is different under different output torques, and when the output torque is smaller, the number of planetary gear assemblies 13 is smaller, but not smaller than three.
Further, the circumferential surface of the first friction transmission portion 16 is located at a point farthest from the axis of the sun gear member 12, and the distance between the point and the axis of the sun gear member 12 is greater than the radius of the circle where the inner wall of the flange 14 is located.
As one embodiment of the present embodiment, two first gear portions 15 are located at both ends in the axial direction of the first friction transmission portion 16, or two first friction transmission portions 16 are located at both ends in the axial direction of the first gear portion 15.
As an implementation manner of this embodiment, the sun gear assembly 12 further has a cylinder 22, the second gear portion 17 is coaxially fixed on the cylinder 22, the second friction transmission portion 18 is cylindrical, and the second friction transmission portion 18 is sleeved on the cylinder 22.
As an implementation of this embodiment, the second friction transmission portion 18 is in clearance fit with the post 22.
As an implementation of this embodiment, the mounting assembly 11 includes a first planet carrier 23, a second planet carrier 24 and an inner ring assembly,
The first and second planet carriers 23, 24 are mounted in the inner race assembly by second bearings 28, respectively;
The sun gear assembly 12 is rotatably connected to the first and second planet carriers 23, 24, respectively, by a third bearing 29;
The two ends of the planet shaft 20 of the planet wheel assembly 13 are respectively and fixedly connected with the first planet carrier 23 and the second planet carrier 24 through bolts;
the flange 14 is coaxially disposed with the inner ring assembly.
Further, the inner ring assembly has two inner rings 25, and further, two ends of the flange 14 in the axial direction thereof are respectively mounted between the two inner rings 25 through fourth bearings 26. One inner ring 25 is used for mounting the first planetary support 23 through a bearing, the other inner ring 25 is used for mounting the second planetary support 24 through a bearing, and sealing rings are arranged at the assembling positions of the inner ring assembly, the first planetary support 23 and the second planetary support 24. The fourth bearing 26 may be a thrust bearing.
Further, the inner race 25 is further provided with a third gear portion 27 for engaging the first gear portion 15. When the motor drives the sun gear assembly 12 to rotate, the planetary gear assembly 13 rotates and revolves under the drive of the sun gear assembly 12, and the flange 14 is pushed to rotate through friction, so that the motion or power transmission is realized, wherein the motor is not shown in the drawing.
Since the first gear portion 15 is meshed with the second gear portion 17 and the first gear portion 15 is meshed with the third gear portion 27 of the inner race 25, slipping is avoided, and the first friction transmission portion 16 and the flange 14 are in friction transmission, and sliding occurs when the acting load is greater than the friction force, so that overload protection is achieved.
The planetary gear transmission device comprises a sun gear assembly 12, a first friction transmission part 16, a second friction transmission part 18, a first planetary support 24, a second planetary support 15, a first gear part 17, a second gear part 17, a first friction transmission part 14, a second planetary support 20, a gear mesh and friction force driving mechanism, a gear mesh-friction compound planetary reducer and a gear mesh-friction compound planetary reducer, wherein the sun gear assembly 12 rotates under the driving of a motor, the second gear part 17 is meshed with the first gear part 15 for transmission, and the inner ring assembly is fixed, so that the planetary gear assembly 13 rotates and simultaneously drives the first planetary support 23, the second planetary support 24 and the planetary shaft 20 to rotate;
In addition, the transmission ratio of 5:1-1000:1 can be realized by changing the gear parameters in the sun gear assembly 12, the inner ring assembly and the planet gear assembly 13 and the diameter of the first friction transmission part 16 of the planet gear assembly 13, so that the planetary gear assembly has wide application prospect.
In this embodiment, the sun gear assembly 12 is used as an input stage, the flange 14 is used as an output stage, and the inner race 25 is fixed.
In addition, the flange 14 may be used as an input stage and the sun gear may be used as an output stage, as required.
In practice, since the tooth-mesh-friction compound planetary reducer is similar to a planetary transmission, any one of the cylindrical body 22, the flange 14 and the planetary carrier of the sun gear member 12 may be fixed, and the other two may be made into an input stage and an output stage, respectively, and of course, differential forms may be made, and the planetary carriers herein refer to the first planetary carrier 23 and the second planetary carrier 24.
In addition, the design parameters among the first gear portion 15, and the third gear portion 27 of the inner race 25 are required to satisfy the condition of the planetary reducer transmission.
Although the embodiment of the utility model has been discussed in the foregoing, the utility model is not limited to this particular embodiment, but may be varied in many ways without departing from the original purpose of the utility model.
It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the utility model.
Claims (10)
1. The compound planetary gear speed adjusting device is characterized by comprising a mounting assembly (11), a sun gear assembly (12), a planetary gear assembly (13) and a flange (14), wherein the mounting assembly (11) is used for mounting the sun gear assembly (12) and the planetary gear assembly (13), and the inner side of the flange (14) is in transmission connection with the sun gear assembly (12) through the planetary gear assembly (13);
The planetary wheel assembly (13) has a first gear part (15) and a first friction transmission part (16);
the sun gear assembly (12) has a second gear part (17) and a second friction transmission part (18);
The first gear part (15) is assembled with the second gear part (17) in a meshed mode, the second friction transmission part (18) is in friction transmission connection with the first friction transmission part (16), and the first friction transmission part (16) is in friction transmission connection with the flange (14).
2. The compound planetary gear speed adjustment device according to claim 1, characterized in that the first friction transmission (16) is cylindrical and the first friction transmission (16) has a hollow structure (19).
3. A compound planetary gear speed adjustment device according to claim 2, characterized in that the first friction transmission portion (16) is integrally formed with the first gear portion (15).
4. A compound planetary gear speed adjustment device according to any one of claims 1 to 3, characterized in that the sidewall thickness of the first gear portion (15) is greater than the sidewall thickness of the first friction transmission portion (16).
5. A compound planetary gear speed adjustment device according to any one of claims 1-3, characterized in that the number of planetary wheel assemblies (13) is not less than three, and that each planetary wheel assembly (13) has a planetary shaft (20), the first gear part (15) being mounted on the planetary shaft (20) by means of a first bearing (21).
6. A compound planetary gear speed adjusting device according to any one of claims 1 to 3, characterized in that two first gear portions (15) are located at both ends in the axial direction of the first friction transmission portion (16), or that two first friction transmission portions (16) are located at both ends in the axial direction of the first gear portions (15).
7. The compound planetary gear speed adjusting device according to claim 1, wherein the sun gear assembly (12) further comprises a cylinder (22), the second gear portion (17) is coaxially fixed on the cylinder (22), the second friction transmission portion (18) is cylindrical, and the second friction transmission portion (18) is sleeved on the cylinder (22).
8. The compound planetary gear speed adjustment device according to claim 7, characterized in that the second friction drive (18) is in clearance fit with the cylinder (22).
9. The compound planetary gear speed adjustment device according to claim 1, characterized in that the mounting assembly (11) comprises a first planetary carrier (23), a second planetary carrier (24) and an inner ring assembly,
The first planet carrier (23) and the second planet carrier (24) are respectively arranged in the inner ring assembly through a second bearing (28);
the sun gear assembly (12) is respectively and rotatably connected with the first planet carrier (23) and the second planet carrier (24);
Two ends of a planet shaft (20) of the planet wheel assembly (13) are respectively and tightly connected with the first planet carrier (23) and the second planet carrier (24);
The flange (14) is coaxially arranged with the inner ring assembly.
10. The compound planetary gear speed adjustment device according to claim 9, characterized in that the flange (14) is rotationally connected with the inner ring assembly by a fourth bearing (26);
The inner ring assembly comprises a plurality of inner rings (25), and a third gear part (27) for meshing the first gear part (15) is arranged on the inner rings (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202520646634.8U CN223708469U (en) | 2025-04-07 | 2025-04-07 | Speed adjusting device for composite planetary gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202520646634.8U CN223708469U (en) | 2025-04-07 | 2025-04-07 | Speed adjusting device for composite planetary gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN223708469U true CN223708469U (en) | 2025-12-23 |
Family
ID=98065421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202520646634.8U Active CN223708469U (en) | 2025-04-07 | 2025-04-07 | Speed adjusting device for composite planetary gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN223708469U (en) |
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2025
- 2025-04-07 CN CN202520646634.8U patent/CN223708469U/en active Active
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