Gear motor

Abstract

The utility model relates to the technical field of gear motors, in particular to a gear motor, which comprises a motor, a first shell, a rotor and a stator, the rotor and the stator are coaxially arranged, the stator is fixedly arranged in the first shell, and the rotor rotates around the axis of the motor relative to the stator; the planetary gear set comprises a driving shaft, a sun gear and a plurality of planetary gears, the stator and the sun gear are both fixedly arranged on the driving shaft, the stator and the sun gear rotate coaxially, and the planetary gears are evenly distributed on the periphery of the sun gear and meshed with the sun gear. Therefore, strict coaxial rotation of the two is realized, the problem of axis deviation is accurately solved, the stability of a transmission system is improved, and constant-speed and constant-precision operation of the speed reduction motor is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of geared motor technology, and in particular to a geared motor. Background Technology

[0002] In the field of modern mechanical transmission and power output, planetary gear sets and motors, as core components, undertake the important task of converting the high-speed rotation of the motor into the appropriate speed and torque required by the equipment. In practical engineering applications, the sun shaft of the planetary gear set is connected to the motor shaft for transmission.

[0003] During transmission, the misalignment between the motor shaft and the sun shaft causes uneven gear meshing, resulting in vibration and noise that accelerates gear wear, significantly shortens gear lifespan, increases equipment maintenance costs and downtime, and seriously affects production efficiency and product quality. Utility Model Content

[0004] The purpose of this invention is to provide a geared motor to solve the problem of misalignment between the sun shaft and the motor drive shaft in the prior art of planetary gear sets.

[0005] The technical solution of this utility model is: a geared motor, comprising: a motor, including a first housing and a rotor and a stator coaxially arranged, the stator being fixed inside the first housing, and the rotor rotating relative to the stator around the axis of the motor; a planetary gear set, including a drive shaft, a sun gear and a plurality of planet gears, the stator and the sun gear being fixed on the drive shaft, the stator and the sun gear rotating coaxially, and the plurality of planet gears being evenly distributed on the outer periphery of the sun gear and meshing with the sun gear.

[0006] Preferably, the planetary gear set includes a second housing, in which the sun gear and the planet gears drive each other, and a transition housing is provided between the first housing and the second housing, through which the drive shaft moves.

[0007] Preferably, the first housing and the second housing extend through each other along the length of the drive shaft, the transition housing separates the first housing and the second housing, the transition housing has a first through hole, and the drive shaft movably passes through the first through hole.

[0008] Preferably, a planetary carrier is rotatably connected inside the second housing, the drive shaft is coaxially rotatably connected to the planetary carrier, a plurality of planetary gears are rotatably connected to the planetary carrier, the rotation axes of the plurality of planetary gears are arranged in parallel, the interior of the second housing is provided with an internal toothed portion, and the plurality of planetary gears mesh with the internal toothed portion of the second housing.

[0009] Preferably, a first bearing and a second bearing are provided inside the second housing near its two ends, and the planetary carrier is rotatably connected to the interior of the second housing through the first bearing and the second bearing.

[0010] Preferably, an input shaft is fixedly provided at one end of the planetary carrier away from the drive shaft, the drive shaft and the input shaft are coaxial, the input shaft extends out of the second housing, and an annular first cover plate is fixedly provided at the end face of the second housing away from the transition housing, and the input shaft is rotatably connected to the first cover plate.

[0011] Preferably, a second cover plate is fixedly provided at the end of the first housing away from the transition housing, and a hollow sleeve is fixedly provided on the second cover plate. The drive shaft is rotatably connected to the inner wall of the sleeve, and the stator is fixed to the outer wall of the sleeve.

[0012] Preferably, the second cover plate is fixedly provided with a driver on the side opposite to the first housing, and the motor is driven by the driver.

[0013] Compared with the prior art, the advantages of this utility model are:

[0014] Both the stator and sun gear are fixed on the drive shaft, ensuring strict coaxial rotation. This precisely solves the problem of uneven gear meshing caused by shaft misalignment, greatly reducing impact vibration caused by poor meshing. It also significantly improves accuracy, transmission stability, and reduces equipment operating noise. While improving the working environment, it reduces vibration damage to other components and enhances overall equipment stability. Furthermore, this solution simplifies equipment assembly and debugging, eliminating the need for complex shaft alignment adjustments, shortening debugging time, and improving production preparation efficiency. The stable transmission system ensures the equipment operates at constant speed and precision, reducing production interruptions and quality fluctuations, and improving production efficiency and product quality stability. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0016] Figure 1 This is a schematic diagram of the structure of a geared motor according to the present invention;

[0017] Figure 2 This is a cross-sectional view of a geared motor according to the present invention.

[0018] Figure 3 This is an exploded structural diagram of a geared motor according to the present invention;

[0019] Figure 4 This is a schematic diagram of the planetary carrier described in this utility model;

[0020] Figure 5This is a schematic diagram of the connection structure between the driver and the motor described in this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Motor; 11. First housing; 12. Rotor; 13. Stator; 2. Planetary gear set; 21. Drive shaft; 22. Sun gear; 23. Planet gears; 24. Second housing; 25. Planet carrier; 251. Receiving chamber; 252. Clearance slot; 253. Through hole; 26. First bearing; 27. Second bearing; 3. Input shaft; 4. First cover plate; 5. Transition housing; 51. First through hole; 6. Second cover plate; 7. Sleeve; 8. Driver. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0025] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] like Figure 1 and Figure 2As shown, a geared motor includes a motor 1 and a planetary gear set 2. The motor 1 includes a first housing 11 and a rotor 12 and a stator 13 coaxially arranged. The stator 13 is fixed inside the first housing 11, and the rotor 12 rotates relative to the stator 13 about the axis of the motor 1. The planetary gear set 2 includes a drive shaft 21, a sun gear 22, and a plurality of planet gears 23. The stator 13 and the sun gear 22 are both fixed on the drive shaft 21 and rotate coaxially. The plurality of planet gears 23 are evenly distributed on the outer periphery of the sun gear 22 and mesh with the sun gear 22. The input power is transmitted to the sun gear 22 through the planet gears 23, and the sun gear 22 directly and synchronously transmits the power to the rotor 12 through the drive shaft 21.

[0027] like Figure 3 and Figure 4 As shown, the planetary gear set 2 includes a second housing 24 and a planet carrier 25. The second housing 24 extends through the axis, meaning it has openings at both ends. The planet carrier 25 is movably disposed within the second housing 24, and both the sun gear 22 and planet gears 23 operate within the cavities inside the second housing 24. Specifically, the planet carrier 25 has a receiving chamber 251 for accommodating the sun gear 22 and planet gears 23, and its sidewalls have several clearance slots 252 communicating with the receiving chambers 251. Preferably, the clearance slots 252 are located at the same height and are arranged in an array around the center of the planet carrier 25. The planet gears 23 are rotatably connected to the clearance slots 252 via shafts, and the rotation axis of the planet gears 23 is parallel to the rotation axis of the drive shaft 21. Preferably, each planet gear 23 corresponds to one clearance slot 252.

[0028] Part of the planetary gear 23 extends beyond the clearance slot 252, that is, part of the planetary gear 23 extends beyond the planet carrier 25. The inner wall of the second housing 24 is provided with an internal gear, which is a ring gear, and the planetary gear 23 meshes with the internal gear of the second housing 24. The second housing 24 is provided with a first bearing 26 and a second bearing 27, which are respectively located on both sides of the internal gear. The planet carrier 25 is rotatably connected to the interior of the second housing 24 through the first bearing 26 and the second bearing 27. Preferably, the first bearing 26 and the second bearing 27 are respectively close to the two end faces of the second housing 24.

[0029] The planetary carrier 25 has a through hole 253 on its end face facing the first housing 11, communicating with the receiving chamber 251. The drive shaft 21 movably passes through the through hole 253. The end face of the planetary carrier 25 facing away from the first housing 11 is a closed solid end face. An input shaft 3 is fixedly mounted on the solid end face of the planetary carrier 25, and the axis of the input shaft 3 is coaxial with the axis of the drive shaft 21. The input shaft 3 extends outward toward the second housing 24 and is used to connect to a power source. The second housing 24 has an annular first cover plate 4 fixedly mounted to close the end face of the second housing 24, and the input shaft 3 is rotatably connected to the first cover plate 4.

[0030] like Figure 2 As shown, a transition housing 5 is fixed between the second housing 24 and the first housing 11. Preferably, the first housing 11, the transition housing 5, and the second housing 24 are fixedly connected along the axis by bolts. The transition housing 5 is constructed as a shallow disc-shaped cover, serving as a common end cover for the first housing 11 and the second housing 24. This reduces the axial dimension and separates the spaces of the first housing 11 and the second housing 24. The transition housing 5 has a first through hole 51 through which the drive shaft 21 movably passes. A second cover plate 6 is fixed to the end face of the first housing 11 away from the transition housing 5; that is, the second cover plate 6 and the transition housing 5 are located at opposite ends of the first housing 11. The transition housing 5 serves as a structural connector, making the entire system more stable. The tight connection between the transition housing 5 and the first housing 11 and the second housing 24 helps to create a good sealing environment, preventing external dust, moisture, and other impurities from entering the housing and protecting the internal components from damage.

[0031] The second cover plate 6 is fixedly provided with a sleeve 7, which extends toward the inside of the first housing 11. The sleeve 7 is hollow, that is, it extends through the axial direction. Preferably, the sleeve 7 is a hollow cylinder. The stator 13 is fixed to the outer wall of the sleeve 7, and the drive shaft 21 is rotatably connected to the inside of the sleeve 7. The drive shaft 21 extends sequentially through the planetary carrier 25, the transition housing 5, the first housing 11, and the sleeve 7. The rotor 12 is fixedly connected to the drive shaft 21 and rotatably connected to the outer periphery of the stator 13. The drive shaft 21 directly connects the rotor 12 of the motor 1 and the sun gear 22 of the planetary gear set 2, reducing intermediate transmission links and thus reducing concentricity deviation caused by the cumulative errors of multiple components. This direct connection method makes it easier for the axis of the rotor 12 and the axis of the sun gear 22 to maintain a high degree of alignment, improving the concentricity of the transmission. The direct transmission between the two eliminates the complexity of centering intermediate components and avoids vibration, noise, and additional wear caused by poor centering. The direct alignment of the axis of rotor 12 with the axis of sun gear 22 makes the transmission smoother and reduces the power loss caused by alignment error.

[0032] like Figure 5 As shown, a driver 8 is fixedly mounted on the side of the second cover plate 6 away from the first housing 11, and the motor 1 is driven by the driver 8. The driving method of the motor 1 and the driver 8 is a conventional technique in this field and will not be described in detail here.

[0033] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore, all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within this utility model.

Claims

1. A geared motor, characterized in that, include: The motor (1) includes a first housing (11) and a rotor (12) and a stator (13) arranged coaxially. The stator (13) is fixed inside the first housing (11), and the rotor (12) rotates relative to the stator (13) about the axis of the motor (1). The planetary gear set (2) includes a drive shaft (21), a sun gear (22) and a plurality of planet gears (23). The stator (13) and the sun gear (22) are both fixed on the drive shaft (21). The stator (13) and the sun gear (22) rotate coaxially. The plurality of planet gears (23) are evenly distributed on the outer periphery of the sun gear (22) and mesh with the sun gear (22).

2. The geared motor according to claim 1, characterized in that: The planetary gear set (2) includes a second housing (24), the sun gear (22) and the planet gears (23) drive each other within the second housing (24), a transition housing (5) is provided between the first housing (11) and the second housing (24), and the drive shaft (21) moves through the transition housing (5).

3. A geared motor according to claim 2, characterized in that: The first housing (11) and the second housing (24) pass through the drive shaft (21) along its length. The transition housing (5) separates the first housing (11) and the second housing (24). The transition housing (5) has a first through hole (51). The drive shaft (21) passes through the first through hole (51).

4. A geared motor according to claim 2, characterized in that: The second housing (24) is rotatably connected to a planetary carrier (25), the drive shaft (21) is rotatably connected to the planetary carrier (25) on the same axis, a plurality of planetary gears (23) are rotatably connected to the planetary carrier (25), the rotation axes of the plurality of planetary gears (23) are arranged in parallel, the interior of the second housing (24) is provided with an internal toothed portion, and the plurality of planetary gears (23) mesh with the internal toothed portion of the second housing (24).

5. A geared motor according to claim 4, characterized in that: The second housing (24) has a first bearing (26) and a second bearing (27) near its two ends. The planetary carrier (25) is rotatably connected to the interior of the second housing (24) through the first bearing (26) and the second bearing (27).

6. A geared motor according to claim 4, characterized in that: An input shaft (3) is fixed at one end of the planetary carrier (25) away from the drive shaft (21). The drive shaft (21) and the input shaft (3) are coaxial. The input shaft (3) extends out of the second housing (24). An annular first cover plate (4) is fixed at the end face of the second housing (24) away from the transition housing (5). The input shaft (3) and the first cover plate (4) are rotatably connected.

7. A geared motor according to claim 1, characterized in that: The first housing (11) is fixedly provided with a second cover plate (6) at the end away from the transition housing (5), and the second cover plate (6) is fixedly provided with a hollow sleeve (7). The drive shaft (21) is rotatably connected to the inner wall of the sleeve (7), and the stator (13) is fixedly provided to the outer wall of the sleeve (7).

8. A geared motor according to claim 7, characterized in that: The second cover plate (6) is fixed with a driver (8) on the side away from the first housing (11), and the motor (1) is driven by the driver (8).

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