Heavy-load planetary gear speed reducer for servo structure

Abstract

The utility model relates to the technical field of speed reducers, and discloses a heavy-load planetary gear speed reducer for a servo structure, which comprises a shell, a fixing ring is fixedly connected to the inner wall of the shell, an input shaft is rotatably connected to the middle of the fixing ring, and a sun gear is fixedly connected to one end of the input shaft. The outer wall of the sun gear is connected with a plurality of planet gears in a meshed mode, the inner wall of the fixing ring is fixedly connected with an inner gear ring, the inner wall of the inner gear ring is connected with the outer walls of the planet gears in a meshed mode, the middle of each planet gear is fixedly connected with a fixing shaft, and the outer wall of each fixing shaft is rotationally connected with a planet carrier. And the middle part of the planet carrier is fixedly connected with an output shaft. The sun gear drives the planet gear to revolve and rotate, the planet gear is meshed with the fixed inner gear ring and converted into rotation of the planet carrier, finally output is achieved through the output shaft, and due to the fact that the number of teeth of the inner gear ring is larger than that of teeth of the sun gear, power is converted into low-speed high torque from high-speed low torque, and speed reduction and torque increasing are achieved.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer technology, and in particular to a heavy-duty planetary gear reducer for servo structures. Background Technology

[0002] The development of speed reducers stemmed from the diverse power transmission needs of industrial production. In the early stages of industrial development, with the emergence of various mechanical equipment, the output speed and torque of a single power source could not directly meet the actual operating requirements of the equipment. This spurred the need for a device capable of changing speed and torque, leading to the gradual development of speed reducers. The traditional gear transmission principle provided the basic framework for speed reducer design, achieving a reduction in speed and an increase in torque through the meshing of gears with different numbers of teeth. With the development of electronic and automation control technologies, the integration of speed reducers with servo motors has become increasingly close.

[0003] A servo reducer is a mechanical transmission device used in servo systems. Its main function is to connect the servo motor and the load, and adjust the output speed and torque of the servo motor by changing the transmission ratio to meet the actual working requirements of the load. However, traditional gear reducers have many limitations when facing heavy-load conditions. Although ordinary cylindrical gear reducers have a simple structure and low cost, they are difficult to meet the requirements of servo systems in terms of transmission accuracy, load-bearing capacity and compactness. Large backlash will lead to a decrease in the positioning accuracy of the system and make it impossible to achieve high-precision position control, which is unacceptable in applications with extremely high precision requirements. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a heavy-duty planetary gear reducer for servo structures, aiming to improve the problem that traditional gear reducers in the prior art cannot meet the requirements of servo systems in terms of transmission accuracy, load-bearing capacity and compactness, and that large backlash will lead to a decrease in the positioning accuracy of the system and make it impossible to achieve high-precision position control.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a heavy-duty planetary gear reducer for servo structures, comprising a housing, a fixed ring fixedly connected to the inner wall of the housing, an input shaft rotatably connected to the center of the fixed ring, a sun gear fixedly connected to one end of the input shaft, a plurality of planet gears meshing with the outer wall of the sun gear, an internal gear ring fixedly connected to the inner wall of the fixed ring, the inner wall of the internal gear ring meshing with the outer wall of the planet gears, a fixed shaft fixedly connected to the center of the planet gears, a planet carrier rotatably connected to the outer wall of the fixed shaft, an output shaft fixedly connected to the center of the planet carrier, and a lubrication mechanism provided on the outer wall of the housing for lubricating the internal structure.

[0006] As a further description of the above technical solution:

[0007] The lubrication mechanism includes an oil reservoir, the top of which is fixedly connected to the bottom of the outer casing. The top of the oil reservoir is connected to an oil outlet, which penetrates the bottom of the outer wall of the outer casing. The middle of the outer casing is connected to an outflow pipe, and a filter pipe is installed in the middle of the outflow pipe. The other end of the outflow pipe is connected to the oil reservoir. A fixing sleeve is fixedly connected to the outer wall of the output shaft, and a connecting rod is fixedly connected to the outer wall of the fixing sleeve. The other end of the connecting rod is fixedly connected to a fitting block.

[0008] As a further description of the above technical solution:

[0009] Multiple heat sinks are fixedly connected to the outer wall of the housing, and multiple heat dissipation holes are opened on the outer wall of the heat sinks.

[0010] As a further description of the above technical solution:

[0011] The input shaft has a slot one on one end of its outer wall, and the output shaft has a slot two on one end of its outer wall.

[0012] As a further description of the above technical solution:

[0013] A bearing is fixedly connected to the outer wall of the input shaft, and the outer wall of the bearing is fixedly connected to the inner wall of the retaining ring.

[0014] As a further description of the above technical solution:

[0015] A mounting bracket is fixedly connected to the bottom of the outer casing, and the outer wall of the mounting bracket has mounting holes.

[0016] As a further description of the above technical solution:

[0017] The outer wall of the fixed shaft is fitted with a retaining ring, and the diameter of the input shaft is smaller than the diameter of the output shaft.

[0018] As a further description of the above technical solution:

[0019] A sealing ring is fixedly connected between the outer wall of the outflow pipe and the inner wall of the outer shell, and a fitting port is fixedly connected to the top of the oil outlet.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, when power is input from the input shaft, the sun gear starts to rotate. Since the sun gear and planet gears are meshed, the rotation of the sun gear will drive the planet gears to revolve around the sun gear. At the same time, the planet gears will also rotate on their own axis. During the rotation and revolution of the planet gears, due to the meshing relationship between the planet gears and the internal gear ring, and the fact that the internal gear ring is fixed, the motion of the planet gears is ultimately converted into the rotation of the planet carrier, that is, finally output by the output shaft. Since the number of teeth of the internal gear ring is greater than that of the sun gear, the high-speed, low-torque power input is converted into low-speed, high-torque power output from the output shaft after being transmitted through multiple gears, thereby realizing the function of deceleration and torque increase.

[0022] 2. In this utility model, the bonding block rotates along with the output shaft, and the bonding opening is attached to the inner wall of the outer shell. When the bonding block rotates rapidly and sweeps across the surface of the bonding opening, a negative pressure is generated, thereby drawing the lubricating oil in the oil tank into the outer shell through the oil outlet. When the amount of lubricating oil is higher than that in the outflow pipe, the lubricating oil returns to the oil tank through the outflow pipe. During the process, the lubricating oil is filtered through the filter pipe to remove impurities, keeping the lubrication environment clean, reducing the risk of component wear, and extending the maintenance cycle of the reducer. Attached Figure Description

[0023] Figure 1 This is a front perspective view of a heavy-duty planetary gear reducer for a servo structure proposed in this utility model;

[0024] Figure 2 This is a partial structural diagram of the fixed ring of a heavy-duty planetary gear reducer for a servo structure proposed in this utility model;

[0025] Figure 3 This is a partial structural exploded view of the planetary gears of a heavy-duty planetary gear reducer for a servo structure proposed in this utility model.

[0026] Figure 4 This is a partial structural diagram of the outlet pipe of a heavy-duty planetary gear reducer for servo structures proposed in this utility model.

[0027] Figure 5 This is a partial structural schematic diagram of the oil reservoir for a heavy-duty planetary gear reducer for servo structures proposed in this utility model.

[0028] Legend:

[0029] 1. Housing; 2. Lubrication mechanism; 201. Oil reservoir; 202. Oil outlet; 203. Outlet pipe; 204. Filter pipe; 205. Fixing sleeve; 206. Connecting rod; 207. Fitting block; 3. Fixing ring; 4. Input shaft; 5. Sun gear; 6. Planet gears; 7. Internal gear ring; 8. Fixing shaft; 9. Planet carrier; 10. Output shaft; 11. Heat sink; 12. Heat dissipation hole; 13. Slot 1; 14. Fixing bracket; 15. Mounting hole; 16. Bearing; 17. Snap ring; 18. Sealing ring; 19. Fitting opening; 20. Slot 2. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see the appendix Figure 1 - Appendix Figure 3 This utility model provides an embodiment of a heavy-duty planetary gear reducer for servo structures, comprising a housing 1, a fixed ring 3 fixedly connected to the inner wall of the housing 1, an input shaft 4 rotatably connected to the middle of the fixed ring 3, a sun gear 5 fixedly connected to one end of the input shaft 4, a plurality of planet gears 6 meshing with the outer wall of the sun gear 5, an internal gear ring 7 fixedly connected to the inner wall of the fixed ring 3, the inner wall of the internal gear ring 7 meshing with the outer wall of the planet gears 6, the planet gears 6 being evenly distributed around the sun gear 5 and tightly meshing with the internal gear ring 7 fixedly connected to the inner wall of the fixed ring 3, a fixed shaft 8 fixedly connected to the middle of the planet gears 6, a planet carrier 9 rotatably connected to the outer wall of the fixed shaft 8, the outer wall of the fixed shaft 8 and the planet carrier 9 rotating flexibly, an output shaft 10 fixedly connected to the middle of the planet carrier 9, the output shaft 10 transmitting the reduced and increased torque power to the subsequent working mechanism, and a lubrication mechanism 2 provided on the outer wall of the housing 1 for lubricating the internal structure.

[0032] Please see the appendix Figure 4 - Appendix Figure 5The lubrication mechanism 2 includes an oil reservoir 201, the top of which is fixedly connected to the bottom of the outer casing 1. The top of the oil reservoir 201 is connected to an oil outlet 202, which penetrates the bottom of the outer wall of the outer casing 1, ensuring that the lubricating oil can smoothly enter the key lubrication parts inside the reducer to lubricate the meshing parts of the sun gear 5 and the planetary gear 6. The middle of the outer casing 1 is connected to an outlet pipe 203, and a filter pipe 204 is provided in the middle of the outlet pipe 203, which can effectively filter out metal debris and impurity particles carried by the lubricating oil during circulation. The other end of the outlet pipe 203 is connected to the oil reservoir 201. A fixing sleeve 205 is fixedly connected to the outer wall of the output shaft 10, and a connecting rod 206 is fixedly connected to the outer wall of the fixing sleeve 205. The other end of the connecting rod 206 is fixedly connected to a contact block 207.

[0033] Please see the appendix Figure 1 - Appendix Figure 3 Multiple heat sinks 11 are fixedly connected to the outer wall of the outer casing 1. Multiple heat dissipation holes 12 are opened on the outer wall of the heat sink 11 to increase the contact area with air. Multiple heat dissipation holes 12 are evenly opened on the outer wall of the heat sink 11. When air flows through the heat sink 11, heat can be quickly dissipated to the surrounding environment through the heat dissipation holes 12, reducing the internal temperature of the reducer and ensuring that each component works within a suitable temperature range. A slot 13 is opened at one end of the outer wall of the input shaft 4 to facilitate connection with the servo motor and ensure that power can be accurately transmitted to the reducer. A slot 20 is opened at one end of the outer wall of the output shaft 10 for connection with the subsequent working mechanism. A bearing 16 is fixedly connected to the outer wall of the input shaft 4. The outer wall of the bearing 16 is fixedly connected to the inner wall of the fixing ring 3.

[0034] Please see the appendix Figure 3 - Appendix Figure 5 A fixing bracket 14 is fixedly connected to the bottom of the outer casing 1. The outer wall of the fixing bracket 14 has a mounting hole 15 for easy installation of the equipment. A retaining ring 17 is engaged on the outer wall of the fixed shaft 8. The retaining ring 17 is used to axially position the fixed shaft 8 and prevent axial movement during operation. The diameter of the input shaft 4 is smaller than the diameter of the output shaft 10. A sealing ring 18 is fixedly connected between the outer wall of the outlet pipe 203 and the inner wall of the outer casing 1 to effectively prevent the leakage of lubricating oil. A fitting port 19 is fixedly connected to the top of the oil outlet 202.

[0035] Working principle: When power is input from input shaft 4, sun gear 5 starts to rotate. Since sun gear 5 and planet gear 6 are meshed, the rotation of sun gear 5 will drive planet gear 6 to revolve around sun gear 5. At the same time, planet gear 6 will also rotate on its own axis. During the rotation and revolution of planet gear 6, because of the meshing relationship between planet gear 6 and internal gear ring 7, and the fixed internal gear ring 7, the motion of planet gear 6 is finally converted into the rotation of planet carrier 9, which is finally output by output shaft 10. Since the number of teeth of internal gear ring 7 is more than that of sun gear 5, the high-speed, low-torque input power is converted into low-speed, high-torque power after being transmitted through multiple gears and output from output shaft 10, thereby realizing the function of deceleration and torque increase.

[0036] The bonding block 207 rotates along with the output shaft 10. The bonding port 19 is in contact with the inner wall of the housing 1. When the bonding block 207 rotates rapidly and sweeps across the surface of the bonding port 19, a negative pressure is generated, which draws the lubricating oil in the oil reservoir 201 into the housing 1 through the oil outlet 202. When the amount of lubricating oil is higher than that in the outlet pipe 203, the lubricating oil returns to the oil reservoir 201 through the outlet pipe 203. During the process, the lubricating oil is filtered by the filter pipe 204, which filters out impurities in the lubricating oil, keeps the lubrication environment clean, reduces the risk of component wear, and extends the maintenance cycle of the reducer.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A heavy-duty planetary gear reducer for servo structures, comprising a housing (1), characterized in that: A fixed ring (3) is fixedly connected to the inner wall of the outer shell (1). An input shaft (4) is rotatably connected to the middle of the fixed ring (3). A sun gear (5) is fixedly connected to one end of the input shaft (4). Multiple planet gears (6) are meshed with the outer wall of the sun gear (5). An internal gear ring (7) is fixedly connected to the inner wall of the fixed ring (3). The inner wall of the internal gear ring (7) meshes with the outer wall of the planet gears (6). A fixed shaft (8) is fixedly connected to the middle of the planet gears (6). A planet carrier (9) is rotatably connected to the outer wall of the fixed shaft (8). An output shaft (10) is fixedly connected to the middle of the planet carrier (9). A lubrication mechanism (2) is provided on the outer wall of the outer shell (1). The lubrication mechanism (2) is used to lubricate the internal structure.

2. The heavy-duty planetary gear reducer for servo structures according to claim 1, characterized in that: The lubrication mechanism (2) includes an oil reservoir (201), the top of which is fixedly connected to the bottom of the outer shell (1), the top of which is connected to an oil outlet (202), the oil outlet (202) penetrating the bottom of the outer wall of the outer shell (1), the middle of which is connected to an outflow pipe (203), the middle of which is provided with a filter pipe (204), the other end of which is connected to the oil reservoir (201), the outer wall of the output shaft (10) is fixedly connected to a fixing sleeve (205), the outer wall of which is fixedly connected to a connecting rod (206), and the other end of which is fixedly connected to a fitting block (207).

3. The heavy-duty planetary gear reducer for servo structures according to claim 1, characterized in that: The outer wall of the outer shell (1) is fixedly connected with a plurality of heat sinks (11), and the outer wall of the heat sinks (11) is provided with a plurality of heat dissipation holes (12).

4. The heavy-duty planetary gear reducer for servo structures according to claim 1, characterized in that: The input shaft (4) has a slot 1 (13) on one end of its outer wall, and the output shaft (10) has a slot 2 (20) on one end of its outer wall.

5. A heavy-duty planetary gear reducer for servo structures according to claim 1, characterized in that: The outer wall of the input shaft (4) is fixedly connected to a bearing (16), and the outer wall of the bearing (16) is fixedly connected to the inner wall of the fixing ring (3).

6. A heavy-duty planetary gear reducer for servo structures according to claim 1, characterized in that: The bottom of the outer shell (1) is fixedly connected to a fixing frame (14), and the outer wall of the fixing frame (14) is provided with mounting holes (15).

7. A heavy-duty planetary gear reducer for servo structures according to claim 1, characterized in that: The outer wall of the fixed shaft (8) is fitted with a retaining ring (17), and the diameter of the input shaft (4) is smaller than the diameter of the output shaft (10).

8. A heavy-duty planetary gear reducer for servo structures according to claim 2, characterized in that: A sealing ring (18) is fixedly connected between the outer wall of the outflow pipe (203) and the inner wall of the outer shell (1), and a fitting port (19) is fixedly connected to the top of the oil outlet (202).

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