Planetary gearbox with end cover output structure

Abstract

The utility model discloses an end cover output structure epicyclic gearbox and speed reduction motor, which comprises a motor, a shell and an output end cover, the shell comprises a lower-layer inner gear ring and an upper-layer inner gear ring, the upper-layer inner gear ring is rotatably connected with the lower-layer inner gear ring, and the lower-layer inner gear ring is rotatably connected with the output end cover. The upper-layer inner gear ring covers the lower-layer inner gear ring to form a mounting space located inside, the output end cover is fixedly connected to the top of the upper-layer inner gear ring, the motor is fixedly connected to the bottom of the lower-layer inner gear ring, and a rotating shaft of the motor penetrates into the mounting space upwards; a rotating shaft of the motor is fixedly connected with a sun gear, the sun gear is provided with a gear shaft, and the sun gear extends upwards through the gear shaft to be fixedly connected with the output end cover; a lower-layer planetary gear is meshed between the lower-layer inner gear ring and the sun gear, the lower-layer planetary gear is coaxially connected with an upper-layer planetary gear, and the upper-layer planetary gear is meshed with the upper-layer inner gear ring; the overall size is reduced, and the requirement for equipment compactness is met.

Description

Technical Field

[0001] This utility model relates to the field of geared motor technology, specifically to a planetary gearbox with an end cover output structure. Background Technology

[0002] In the fields of industrial automation and mechanical transmission, geared motors, as a key power device, are widely used in various mechanical equipment, such as robots, automated production lines, and logistics transportation equipment. Their function is to convert the high-speed, low-torque output of a motor into a low-speed, high-torque output to meet the operational needs of different equipment.

[0003] Traditional geared motors typically employ methods such as conventional gear reduction or worm gear reduction. While conventional gear reduction has a simple structure, achieving a large reduction ratio often requires multiple stages of gear transmission, resulting in a bulky, heavy, and complex overall structure. Furthermore, it suffers from significant energy loss and low efficiency during transmission. Worm gear reduction, on the other hand, can achieve a large reduction ratio and self-locking function, but it has low transmission efficiency, generates a lot of heat, and requires regular maintenance and lubrication changes, increasing operating costs and maintenance complexity.

[0004] With the ever-increasing demands of modern industry on equipment performance, such as the increasingly stringent requirements for compactness, high efficiency, stability, and reliability, traditional geared motors can no longer meet these needs. Therefore, the development of a new type of geared motor with a compact structure, high transmission efficiency, and stable and reliable performance has become an urgent need in the industry. Utility Model Content

[0005] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0006] A planetary gearbox with an end cap output structure includes a motor, a housing, and an output end cap. The housing includes a lower internal gear ring and an upper internal gear ring. The upper internal gear ring is rotatably connected to the lower internal gear ring and covers the lower internal gear ring to form an internal mounting space. The output end cap is fixedly connected to the top of the upper internal gear ring. The motor is fixedly connected to the bottom of the lower internal gear ring, and the rotation axis of the motor passes upward into the mounting space.

[0007] The rotating shaft of the motor is fixedly connected to a sun gear, which has a toothed shaft and is fixedly connected to the output end cover by extending the toothed shaft upward.

[0008] A lower planetary gear meshes between the lower internal gear ring and the sun gear, and the lower planetary gear is coaxially connected to an upper planetary gear, which meshes with the upper internal gear ring.

[0009] The upper internal gear ring and the lower internal gear ring have a difference in the number of teeth.

[0010] As a further embodiment of this utility model: an annular connector is fixedly connected to the top of the motor, and the annular connector is sleeved on the rotating shaft of the motor, and the lower internal gear ring is fixedly connected to the annular connector.

[0011] As a further embodiment of this utility model: the top of the annular connector is formed with an annular seat, and the rotation axis of the motor passes upward through the annular seat and is fixedly connected to the sun gear;

[0012] A lower planetary carrier is fitted onto the annular seat and between the annular seat and the sun gear. The gear shaft of the sun gear is fitted onto an upper planetary carrier via a flange bearing. The lower planetary carrier corresponds to the lower planetary gear, and the upper planetary carrier corresponds to the upper planetary gear.

[0013] As a further embodiment of this utility model: the inner side of the lower inner gear ring has an inner groove located at its upper part and a gear ring structure located at its lower part, the upper inner gear ring is rotatably connected to the inner groove, and an annular step acting on the upper inner gear ring is provided between the inner groove and the gear ring structure.

[0014] As a further embodiment of this utility model: a plurality of needle rollers are connected and distributed between the upper internal gear ring and the lower internal gear ring.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] Compared to traditional multi-stage gear reducers that require a large space to accommodate multiple gears, this planetary gearbox utilizes the compact layout of the planetary gear system to achieve complex transmissions in a relatively small space. Furthermore, the upper and lower internal gear rings are combined to form an installation space, reducing the overall volume and meeting the compactness requirements of modern industry. Planetary gear transmission itself has high transmission efficiency, reducing energy loss compared to worm gear reduction. Moreover, by rationally designing the tooth number difference, the transmission ratio is optimized, further improving transmission efficiency and reducing operating energy consumption.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is an exploded structural diagram of the present invention;

[0021] Figure 3 This is an exploded structural diagram of the annular connector, motor, lower planetary carrier, and sun gear in this utility model.

[0022] Figure 4 This is a schematic diagram of the structure of the lower internal gear ring in this utility model;

[0023] Figure 5 This is a cross-sectional structural diagram of the present invention.

[0024] The reference numerals and names in the figure are as follows:

[0025] 1. Motor; 2. Housing; 3. Output end cover; 4. Lower internal gear ring; 5. Upper internal gear ring; 6. Sun gear; 7. Gear shaft; 8. Lower planetary gear; 9. Upper planetary gear; 10. Annular connector; 11. Annular seat; 12. Lower planetary carrier; 13. Upper planetary carrier; 14. Inner groove; 15. Gear ring structure; 16. Annular step; 17. Needle roller; 18. Rotating shaft; 19. Flange bearing. Detailed Implementation

[0026] 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.

[0027] Please see Figure 1-5 In this embodiment of the utility model, a planetary gearbox with an end cap output structure includes a motor 1, a housing 2, and an output end cap 3. The housing 2 includes a lower internal gear ring 4 and an upper internal gear ring 5. The upper internal gear ring 5 is rotatably connected to the lower internal gear ring 4, and the upper internal gear ring 5 covers the lower internal gear ring 4 to form an internal installation space. The output end cap 3 is fixedly connected to the top of the upper internal gear ring 5. The motor 1 is fixedly connected to the bottom of the lower internal gear ring 4, and the rotating shaft 18 of the motor 1 extends upward into the installation space.

[0028] The rotating shaft 18 of the motor 1 is fixedly connected to the sun gear 6, which has a toothed shaft 7 and is fixedly connected to the output end cover 3 by extending upward through the toothed shaft 7.

[0029] A lower planetary gear 8 meshes between the lower internal gear ring 4 and the sun gear 6. The lower planetary gear 8 is coaxially connected to an upper planetary gear 9, and the upper planetary gear 9 meshes with the upper internal gear ring 5.

[0030] The upper internal gear ring 5 and the lower internal gear ring 4 have a difference in the number of teeth.

[0031] In this utility model, motor 1 serves as the power source. The rotating shaft 18 of motor 1 is fixedly connected to the sun gear 6. When motor 1 starts, the rotating shaft 18 of motor 1 drives the sun gear 6 to rotate together. The sun gear 6 receives power input and begins to rotate around its own axis. This is the starting point of the power of the entire planetary gearbox. When the sun gear 6 rotates, it meshes with the lower planetary gear 8. The teeth of the sun gear 6 push the teeth of the lower planetary gear 8, causing the lower planetary gear 8 to revolve around the sun gear 6. At the same time, the lower planetary gear 8 itself will also rotate due to the meshing action. The lower planetary gear 8 is coaxially connected with the upper planetary gear 9. Therefore, the revolution and rotation of the lower planetary gear 8 will be transmitted to the upper planetary gear 9, causing the upper planetary gear 9 to revolve and rotate synchronously. While revolving, the upper planetary gear 9 also meshes with the upper internal gear ring 5.

[0032] The upper internal gear ring 5 and the lower internal gear ring 4 have a difference in the number of teeth, which is the key to the planetary gearbox achieving a specific transmission ratio and motion output. Driven by the sun gear 6, the lower planetary gear 8 and the upper planetary gear 9 perform differential motion between the upper and lower internal gear rings 4. Due to the difference in the number of teeth between the upper and lower internal gear rings 4, the upper planetary gear 9 will generate a specific rotational speed and motion trajectory during meshing.

[0033] The sun gear 6 has a gear shaft 7, which extends upward to be fixedly connected to the output end cover 3. During the differential motion of the planetary gear system, in addition to its own rotation, the sun gear 6 will also generate a certain axial displacement or motion tendency due to the motion of the planetary gears. This motion is transmitted to the output end cover 3 through the gear shaft 7. Finally, the output end cover 3 outputs the power after the planetary gear system transmission and speed change, driving the external load connected to the output end cover 3 to move.

[0034] The entire planetary gearbox is driven by motor 1 to drive sun gear 6. By utilizing the meshing transmission between planetary gears, sun gear 6, and internal gear ring, as well as the differential effect generated by the difference in the number of teeth between upper internal gear ring 5 and lower internal gear ring 4, the functions of power transmission, speed change, and output by output end cover 3 are realized. It can provide suitable speed and torque for equipment in different application scenarios.

[0035] In summary, compared to traditional multi-stage gear reducers that require a large space to accommodate multiple gears, this planetary gearbox utilizes the compact layout of the planetary gear system to achieve complex transmission within a relatively small space. Furthermore, the upper and lower internal gear rings are fitted together to form an installation space, reducing the overall volume and meeting the compactness requirements of modern industry. Planetary gear transmission itself has high transmission efficiency, reducing energy loss compared to worm gear reduction. Moreover, by rationally designing the tooth number difference, the transmission ratio is optimized, further improving transmission efficiency and reducing operating energy consumption.

[0036] In this embodiment of the present invention, an annular connector 10 is fixedly connected to the top of the motor 1, and the annular connector 10 is sleeved on the rotating shaft 18 of the motor 1. The lower internal gear ring 4 is fixedly connected to the annular connector 10.

[0037] In terms of connection method, the annular connector 10 is sleeved on the rotating shaft 18 of the motor 1 and fixedly connected to the lower internal gear ring 4, forming a stable bridge between the motor 1 and the lower internal gear ring 4. In terms of design principle, this connection design cleverly utilizes the characteristics of the annular structure. The sleeved design of the annular connector 10 not only ensures the free rotation of the rotating shaft 18 of the motor 1, but also strengthens the connection stability with the lower internal gear ring 4, allowing all components of the planetary gearbox to work closely together during power transmission, reducing energy loss and transmission error.

[0038] In this embodiment of the utility model, the top of the annular connector 10 is formed with an annular seat 11, and the rotating shaft 18 of the motor 1 passes upward through the annular seat 11 and is fixedly connected to the sun gear 6.

[0039] A lower planetary carrier 12 is sleeved on the annular seat 11 and between the annular seat 11 and the sun gear 6. The gear shaft 7 of the sun gear 6 is sleeved on the upper planetary carrier 13 through the flange bearing 19. The lower planetary carrier 12 corresponds to the lower planetary gear 8, and the upper planetary carrier 13 corresponds to the upper planetary gear 9.

[0040] The annular seat 11 formed at the top of the annular connector 10 provides a more stable support point for the connection between the rotating shaft 18 of the motor 1 and the sun gear 6. The rotating shaft 18 of the motor 1 passes upward through the annular seat 11 and is fixedly connected to the sun gear 6, ensuring the axial stability of the sun gear 6 during rotation. The lower planetary carrier 12 is sleeved between the annular seat 11 and the sun gear 6, allowing the lower planetary carrier 12 to revolve around the sun gear 6 with the annular seat 11 as the reference. At the same time, the gear shaft 7 of the sun gear 6 is sleeved on the upper planetary carrier 13 through the flange bearing 19, utilizing the flange... The high precision and low friction of bearing 19 ensures the free rotation of the upper planetary carrier 13 relative to the gear shaft 7, while also withstanding certain axial and radial loads. The lower planetary carrier 12 corresponds to the lower planetary gear 8, and the upper planetary carrier 13 corresponds to the upper planetary gear 9. This design establishes a stable transmission relationship between the planetary gears and the planetary carrier, ensuring that the upper planetary gear 9 and the lower planetary gear 8 are effectively constrained and guided by the corresponding upper planetary carrier 13 and lower planetary carrier 12 during their revolution and rotation, thereby effectively improving transmission accuracy and increasing stability.

[0041] In this embodiment of the present invention, the inner side of the lower inner gear ring 4 is formed with an inner groove 14 located above it and a gear ring structure 15 located below it. The upper inner gear ring 5 is rotatably connected to the inner groove 14, and an annular step 16 acting on the upper inner gear ring 5 is provided between the inner groove 14 and the gear ring structure 15.

[0042] The inner groove 14 on the upper inner side of the lower internal gear ring 4 provides a space for the upper internal gear ring 5 to rotate, allowing the upper internal gear ring 5 to rotate stably relative to it, thus coordinating the different motion states of the upper and lower layers in the planetary gearbox. The gear ring structure 15 at the bottom of the lower internal gear ring 4 is the key part that meshes with the lower planetary gear 8, playing an important role in transmitting power and motion. The annular step 16 protruding between the inner groove 14 and the gear ring structure 15 plays a positioning and constraint role for the upper internal gear ring 5. When the upper internal gear ring 5 rotates, the annular step 16 can limit its axial displacement, ensuring the stability of the upper internal gear ring 5 during rotation, so that the meshing between the upper planetary gear 9 and the upper internal gear ring 5 is always in good condition, maintaining the normal operation of the entire planetary gear transmission system.

[0043] In this embodiment of the present invention, a plurality of needle rollers 17 are connected and distributed between the upper internal gear ring 5 and the lower internal gear ring 4.

[0044] Based on the concept of replacing sliding friction with rolling friction, the needle roller 17 can roll between the upper internal gear ring 5 and the lower internal gear ring 4 when they rotate relative to each other, which greatly reduces the frictional resistance between the upper internal gear ring 5 and the lower internal gear ring 4. Since the needle roller 17 is evenly distributed, the upper internal gear ring 5 and the lower internal gear ring 4 are subjected to more uniform force during relative rotation, avoiding the problem of local stress concentration. This effectively extends the service life of the gear rings (i.e., the upper internal gear ring 5 and the lower internal gear ring 4). The uniform force distribution and low friction reduce the wear on the surface of the gear rings, reduce the failure rate caused by wear, and thus reduce the maintenance and replacement costs of the equipment.

[0045] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. An end cover output structure planetary gearbox characterized by, The motor, the housing and the output end cover are included, the housing includes a lower inner ring gear and an upper inner ring gear, the upper inner ring gear is rotationally connected to the lower inner ring gear, and the upper inner ring gear covers the lower inner ring gear to form an internal mounting space, the output end cover is fixedly connected to the top of the upper inner ring gear, the motor is fixedly connected to the bottom of the lower inner ring gear, and the rotating shaft of the motor penetrates into the mounting space upwardly; The rotating shaft of the motor is fixedly connected with a sun gear, the sun gear has a gear shaft, and the sun gear is fixedly connected with the output end cover by extending upwardly through the gear shaft; A lower planetary gear is engaged between the lower inner ring gear and the sun gear, the lower planetary gear is coaxially connected with an upper planetary gear, and the upper planetary gear is engaged with the upper inner ring gear; The upper inner ring gear and the lower inner ring gear have a difference in the number of teeth.

2. A planetary gearbox according to claim 1, wherein, The top of the motor is fixedly connected with an annular connecting piece, and the annular connecting piece is sleeved on the rotating shaft of the motor, and the lower inner ring gear is fixedly connected with the annular connecting piece.

3. A planetary gearbox according to claim 2, wherein, The top of the annular connecting piece is formed with an annular seat, the rotating shaft of the motor penetrates through the annular seat and is fixedly connected with the sun gear; A lower planet carrier is sleeved on the annular seat and between the annular seat and the sun gear, and the gear shaft of the sun gear is sleeved with the upper planet carrier through a flange bearing, wherein the lower planet carrier corresponds to the lower planetary gear, and the upper planet carrier corresponds to the upper planetary gear.

4. A planetary gearbox according to claim 1, wherein, An inner groove is formed in the inner side of the lower inner ring gear, the upper inner ring gear is rotationally connected to the inner groove, and an annular step acting on the upper inner ring gear is protruded between the inner groove and the ring gear structure.

5. A planetary gearbox according to claim 4, wherein, A plurality of needle rollers are connected and distributed between the upper inner ring gear and the lower inner ring gear.

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