A planetary gear reducer with noise reduction function

Abstract

This utility model relates to the field of planetary gear reducer technology and discloses a planetary gear reducer with noise reduction function. It includes a gear reducer body, a rotating shaft rotatably connected inside the gear reducer body, a noise reduction component on the side wall of the gear reducer body, and a sealing component on the side wall of the rotating shaft. The noise reduction component includes a first noise reduction shell and a second noise reduction shell. The inner walls of both the first and second noise reduction shells are fitted against the side wall of the gear reducer body. A positioning rod is fixedly connected to the side wall of the second noise reduction shell, and the side wall of the positioning rod is slidably connected inside the first noise reduction shell. A rotating handle is rotatably connected to the upper surface of the first noise reduction shell. In this utility model, the positioning rod guides the first and second noise reduction shells to fit together. Rotating the rotating handle causes a locking block to slide into the positioning rod, and a compression spring clamps the two shells to form a closed space. Combined with sealing gaskets and foam aluminum sound absorption, a comprehensive noise reduction effect is achieved, improving its noise reduction performance and user comfort.

Description

Technical Field

[0001] This utility model relates to the field of planetary gear reducer technology, and in particular to a planetary gear reducer with noise reduction function. Background Technology

[0002] In fields such as industrial automation, robotics, and precision machine tools, planetary gearboxes serve as core transmission components, playing a crucial role in reducing speed and increasing torque. Their operational stability and noise control levels directly impact the overall efficiency and operating environment of the equipment. As industries increasingly demand more sophisticated and low-noise equipment, planetary gearboxes with noise reduction capabilities have become a key research focus. These devices, while ensuring transmission accuracy and load-bearing capacity, require rational structural design to reduce noise generated during operation, such as gear meshing and bearing rotation. This is to adapt to noise-sensitive applications like laboratories, medical equipment, and office automation, while simultaneously improving the working environment for operators and reducing noise pollution interference with surrounding equipment.

[0003] Currently, noise reduction technologies for planetary gear reducers largely focus on optimizing the internal transmission structure. Common mechanical structures and technical principles include: employing high-precision gear grinding processes in the gear machining stage to reduce gear tooth surface roughness and thus lower meshing impact noise; selecting low-noise deep groove ball bearings or cylindrical roller bearings in bearing selection, and reducing rotational vibration by optimizing bearing clearance; some models use thickened cast iron material for the reducer housing, utilizing the material's own mass inertia to block noise radiation outwards, or attaching simple sound-absorbing cotton to the inner wall of the housing, using the sound-absorbing properties of porous materials to weaken some mid-to-high frequency noise. In addition, some technologies optimize the lubrication system, using high-viscosity lubricating oil to form a stable oil film, reducing dry friction noise between gears and bearings, thus reducing noise generation at the transmission source.

[0004] However, existing planetary gear reducers still have significant shortcomings in noise control, especially in blocking noise propagation paths. On the one hand, some models are not specifically designed for the housing assembly structure; the housing is mostly integral or simply disassembled. The assembly gaps at the joints of disassembled housings can easily create noise leakage channels, causing internal noise to propagate outward through the gaps, weakening the overall noise reduction effect. On the other hand, even if some models have sound-absorbing materials on the inner wall of the housing, they are mostly single thin-layer structures and do not work in conjunction with the sealing structure of the housing. They cannot effectively absorb high-frequency noise generated by gear meshing, and it is difficult to prevent noise from escaping through gaps after reflection inside the housing. Ultimately, existing planetary gear reducers cannot meet the needs of scenarios with high noise control requirements, affecting the applicability and user comfort of the equipment. Therefore, a planetary gear reducer with noise reduction function is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a planetary gear reducer with noise reduction function, which aims to improve the problems of noise easily propagating through gaps and lack of effective sound absorption in the existing planetary gear reducer.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A planetary reducer with noise reduction function includes a reducer body, a rotating shaft rotatably connected inside the reducer body, a noise reduction component provided on the side wall of the reducer body, and a sealing component provided on the side wall of the rotating shaft.

[0008] The noise reduction assembly includes a noise reduction shell one and a noise reduction shell two. The inner walls of both the noise reduction shell one and the noise reduction shell two are attached to the side wall of the reducer body. A positioning rod is fixedly connected to the side wall of the noise reduction shell two. The side wall of the positioning rod is slidably connected to the inside of the noise reduction shell one. A rotating handle is rotatably connected to the upper surface of the noise reduction shell one. A connecting strip is rotatably connected to the bottom of the rotating handle. A fixing sleeve is fixedly connected to the upper surface of the noise reduction shell one. A locking block is slidably connected inside the fixing sleeve. The side wall of the locking block is slidably connected to the inside of the positioning rod. A fixing block is fixedly connected to the upper surface of the locking block. One end of the connecting strip is rotatably connected to the side wall of the fixing block.

[0009] As a further description of the above technical solution:

[0010] The sealing assembly includes a sealing ring, the sidewall of which is slidably connected inside the reducer body, and the inner wall of which is attached to the sidewall of the rotating shaft.

[0011] As a further description of the above technical solution:

[0012] The side wall of the fixing block is slidably connected inside the fixing sleeve. A compression spring is provided inside the fixing sleeve. One end of the compression spring is fixedly connected inside the fixing sleeve, and the other end of the compression spring is fixedly connected to the side wall of the locking block.

[0013] As a further description of the above technical solution:

[0014] Both the first noise-reducing shell and the second noise-reducing shell are filled with aluminum foam, and a sealing gasket is provided between the first noise-reducing shell and the second noise-reducing shell.

[0015] As a further description of the above technical solution:

[0016] The sealing ring sidewall is provided with two sealing lips, and both sealing lip sidewalls are slidably connected to the inside of the reducer body.

[0017] As a further description of the above technical solution:

[0018] An annular spring is provided inside the sealing ring, and an O-ring is provided on the inner wall of the sealing ring. The side wall of the O-ring is attached to the side wall of the rotating shaft.

[0019] As a further description of the above technical solution:

[0020] The inner wall of the sealing ring is fixedly connected with a first flange and a second flange, and the side walls of the first flange and the second flange are both attached to the side wall of the rotating shaft.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, the noise reduction shell one and the noise reduction shell two are guided and attached by the positioning rod. The rotation of the handle drives the locking block to slide into the positioning rod. The compression spring clamps the two shells to form a closed space. With the help of the sealing gasket to fill the gap and the sound absorption of the foam aluminum, a comprehensive noise reduction effect is achieved. This solves the problem that the noise of the existing planetary reducer is easy to spread through the gap and has no effective sound absorption, thus improving its noise reduction performance and user comfort.

[0023] 2. In this utility model, by embedding the sealing ring into the corresponding installation position of the reducer body, its side wall is slidably connected to the reducer body, and its inner wall is attached to the shaft to form a basic seal. Then, the sealing lip is used to enhance the sealing performance with the reducer body. In conjunction with the ring spring, radial pressure is applied to the sealing lip to compensate for wear gaps. Furthermore, the first and second flanges and the O-ring seal enhance the sealing with the shaft and reduce friction, thereby achieving a stable sealing effect between the shaft and the reducer body. This solves the problem that the existing planetary reducer shaft and body seals are prone to failure due to wear and insufficient sealing tightness. The above structure improves the sealing reliability and service life of the sealing assembly. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of a planetary gear reducer with noise reduction function proposed in this utility model;

[0025] Figure 2 This is a schematic diagram of the noise reduction housing of a planetary gear reducer with noise reduction function proposed in this utility model.

[0026] Figure 3 This is a schematic diagram of the fixed sleeve of a planetary reducer with noise reduction function proposed in this utility model;

[0027] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0028] Figure 5 This is a schematic diagram of the sealing ring structure of a planetary reducer with noise reduction function proposed in this utility model.

[0029] Legend:

[0030] 1. Gearbox body; 2. Shaft; 3. Noise reduction shell one; 4. Noise reduction shell two; 5. Aluminum foam; 6. Positioning rod; 7. Sealing gasket; 8. Rotary handle; 9. Connecting strip; 10. Fixing sleeve; 11. Compression spring; 12. Clamping block; 13. Fixing block; 14. Sealing ring; 15. Sealing lip; 16. Ring spring; 17. First flange; 18. O-ring seal; 19. Second flange. Detailed Implementation

[0031] 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.

[0032] Reference Figures 1-4 The present invention provides an embodiment of a planetary reducer with noise reduction function, comprising a reducer body 1, a rotating shaft 2 rotatably connected inside the reducer body 1, the rotating shaft 2 being used to transmit power and realize torque transmission between the input and output ends of the reducer, a noise reduction component being provided on the side wall of the reducer body 1 to reduce the noise radiated outward during the operation of the reducer body 1, thereby reducing the overall noise level of the equipment, and a sealing component being provided on the side wall of the rotating shaft 2 to seal the gap between the rotating shaft 2 and the reducer body 1, preventing external impurities from entering the equipment and preventing internal lubricant leakage.

[0033] The noise reduction assembly includes a noise reduction shell 1 (3) and a noise reduction shell 2 (4). The inner walls of both shells 1 and 2 are fitted to the side wall of the reducer body 1, forming an outer shell structure that encloses the reducer body 1 to block noise transmission and achieve basic sound insulation. A positioning rod 6 is fixedly connected to the side wall of shell 2 (4). The positioning rod 6 provides guidance when shells 1 and 2 are joined. The side wall of the positioning rod 6 is slidably connected inside shell 1 (3), ensuring precise alignment of the two shells and preventing sound insulation gaps due to misalignment, thus improving the sealing of the joint. A rotating handle 8 is rotatably connected to the upper surface of shell 1 (3). The rotating handle 8 allows the operator to apply rotational force, driving subsequent components. Its ease of rotation directly affects the efficiency of disassembly and assembly of the noise reduction shell. A connecting strip 9 is rotatably connected to the bottom of the rotating handle 8, transmitting power from the handle. A fixed connection is also present on the upper surface of shell 1 (3). The fixed sleeve 10 has a sliding connection of a locking block 12 inside. The locking block 12 is used to embed into the positioning rod 6 to fix the noise reduction shell 3 and the noise reduction shell 4. The side wall of the locking block 12 is slidably connected to the inside of the positioning rod 6, and works with the positioning rod 6 to lock the two shells together, so as to prevent the two shells from separating during the operation of the equipment. The upper surface of the locking block 12 is fixedly connected to a fixing block 13, and the side wall of the fixing block 13 is slidably connected to the inside of the fixed sleeve 10, and works with the fixed sleeve 10 to achieve stable sliding. The fixed sleeve 10 is equipped with a compression spring 11. The function of the compression spring 11 is to store elastic potential energy when the locking block 12 slides. When the external force is removed, the potential energy is released to push the locking block 12 to reset. One end of the compression spring 11 is fixedly connected to the inside of the fixed sleeve 10, and the other end of the compression spring 11 is fixedly connected to the side wall of the locking block 12, and works with the locking block 12 to achieve automatic reset and locking, so as to maintain the fixed state of the two shells without the need to continuously apply external force.

[0034] Both noise reduction shell 1 (3) and noise reduction shell 2 (4) have aluminum foam 5 inside. The aluminum foam 5 is a porous metal material, which is used to absorb the noise generated by the reducer body 1 during operation, especially the mid-to-high frequency noise generated by gear meshing, and reduce the reflection and penetration of noise inside the shell. A sealing gasket 7 is set between noise reduction shell 1 (3) and noise reduction shell 2 (4). The sealing gasket 7 is composed of elastic sealing material and is used to fill the tiny gap at the joint of noise reduction shell 1 (3) and noise reduction shell 2 (4), blocking noise from leaking from the gap. Together with noise reduction shell 1 (3) and noise reduction shell 2 (4), they form a closed sound insulation space to improve the overall sound insulation effect.

[0035] Reference Figure 1 and Figure 5The sealing assembly includes a sealing ring 14, which integrates various sealing components to achieve multi-layer sealing between the rotating shaft 2 and the reducer body 1. The sidewall of the sealing ring 14 is slidably connected to the inside of the reducer body 1, and the inner wall of the sealing ring 14 is attached to the sidewall of the rotating shaft 2 to initially block the gap between the rotating shaft 2 and the sealing ring 14, achieving a basic sealing effect and preventing external impurities from entering or internal lubricant from leaking. The sidewall of the sealing ring 14 is provided with two sealing lips 15, which are used to enhance the sealing performance between the sealing ring 14 and the reducer body 1. The sidewalls of the two sealing lips 15 are slidably connected to the inside of the reducer body 1, forming a double seal with the sidewall of the sealing ring 14, filling the tiny gap between the sealing ring 14 and the reducer body 1, and achieving the effect of further blocking impurities and lubricant, avoiding the failure of the single sealing structure due to gaps.

[0036] An annular spring 16 is provided inside the sealing ring 14. The annular spring 16 is used to apply continuous radial pressure to the two sealing lips 15 to ensure that the sealing lips 15 always fit tightly against the inner wall of the reducer body 1. Even if the sealing lips 15 are slightly worn due to long-term use, the elastic force of the annular spring 16 can push the sealing lips 15 to compensate for the wear gap, so as to maintain the long-term sealing effect and avoid the sealing failure problem after the sealing lips 15 are worn.

[0037] An O-ring 18 is provided on the inner wall of the sealing ring 14. The O-ring 18 is made of rubber and its function is to enhance the sealing tightness between the sealing ring 14 and the rotating shaft 2 and fill the tiny gap between them. The side wall of the O-ring 18 is attached to the side wall of the rotating shaft 2 and forms a double seal with the inner wall of the sealing ring 14, further preventing lubricant from leaking from the gap between the rotating shaft 2 and the sealing ring 14.

[0038] The inner wall of the sealing ring 14 is fixedly connected with a first flange 17 and a second flange 19. The first flange 17 and the second flange 19 are used to axially limit the O-ring seal 18 to prevent the O-ring seal 18 from axially displacing during the rotation of the rotating shaft 2, and to ensure that the O-ring seal 18 is always in the preset sealing position. The side walls of the first flange 17 and the second flange 19 are both attached to the side wall of the rotating shaft 2, and together with the O-ring seal 18, they achieve the effect of improving the sealing stability.

[0039] Working principle: When using this equipment, when it is necessary to install the noise reduction shell, firstly, noise reduction shell 3 and noise reduction shell 4 are attached to both sides of the reducer body 1, so that the positioning rod 6 on the side wall of noise reduction shell 4 slides into the corresponding slot of noise reduction shell 3. Through the guiding action of the positioning rod 6, the two shells are ensured to be accurately connected, avoiding sound insulation gaps caused by misalignment; at the same time, the sealing gasket 7 at the splicing point of the two shells is squeezed and deformed, filling the splicing gap and blocking noise leakage from the gap.

[0040] Next, rotate the handle 8 on the upper surface of the noise reduction shell 3. The handle 8 drives the connecting strip 9 at the bottom to rotate. One end of the connecting strip 9 rotates around the handle 8, and the other end pulls the fixing block 13 to slide along the inner wall of the fixing sleeve 10. The fixing block 13 drives the locking block 12 to slide synchronously, compressing the compression spring 11 inside the fixing sleeve 10 until the locking block 12 slides into the reserved hole of the positioning rod 6. Release the handle 8, the compression spring 11 releases its elastic force, pushes the locking block 12 to reset in the opposite direction, and firmly locks it in the positioning rod 6, completing the fixation of the two shells and forming a closed sound insulation space that wraps around the reducer body 1.

[0041] The foamed aluminum 5 that is attached inside the noise reduction shell 1 3 and the noise reduction shell 2 4 uses its porous structure to absorb the noise radiated outward by the reducer body 1 during operation, reduce the reflection and penetration of noise inside the shell, and further reduce the intensity of noise propagating outward.

[0042] The sealing ring 14 is embedded in the corresponding installation position of the reducer body 1, so that the side wall of the sealing ring 14 is slidably connected to the inside of the reducer body 1, and the inner wall of the sealing ring 14 is attached to the side wall of the rotating shaft 2 to form a basic seal. The two sealing lips 15 on the side wall of the sealing ring 14 are tightly attached to the inside of the reducer body 1, which enhances the sealing performance between the sealing ring 14 and the reducer body 1. The annular spring 16 inside the sealing ring 14 always applies radial pressure to the sealing lips 15, ensuring that the sealing lips 15 are in long-term contact with the inner wall of the reducer body 1. Even if the sealing lips 15 are slightly worn due to long-term use, the elastic force of the annular spring 16 can push the sealing lips 15 to compensate for the gap and maintain the sealing effect. At the same time, the first flange 17 and the second flange 19 on the inner wall of the sealing ring 14 cooperate with the O-ring seal 18, which not only enhances the sealing tightness between the sealing ring 14 and the rotating shaft 2, but also reduces the direct friction of the rotating shaft 2 on the sealing ring 14 when rotating, extends the service life of the sealing assembly, and ensures a stable seal between the rotating shaft 2 and the reducer body 1.

Claims

1. A planetary gear reducer with noise reduction function, comprising a gear reducer body (1), characterized in that: The reducer body (1) is rotatably connected to a rotating shaft (2), the reducer body (1) is provided with a noise reduction component on its side wall, and the rotating shaft (2) is provided with a sealing component on its side wall. The noise reduction assembly includes a noise reduction shell one (3) and a noise reduction shell two (4). The inner walls of the noise reduction shell one (3) and the noise reduction shell two (4) are both attached to the side wall of the reducer body (1). A positioning rod (6) is fixedly connected to the side wall of the noise reduction shell two (4). The side wall of the positioning rod (6) is slidably connected to the inside of the noise reduction shell one (3). A rotating handle (8) is rotatably connected to the upper surface of the noise reduction shell one (3). A connecting strip (9) is rotatably connected to the bottom of the rotating handle (8). A fixing sleeve (10) is fixedly connected to the upper surface of the noise reduction shell one (3). A locking block (12) is slidably connected inside the fixing sleeve (10). The side wall of the locking block (12) is slidably connected to the inside of the positioning rod (6). A fixing block (13) is fixedly connected to the upper surface of the locking block (12). One end of the connecting strip (9) is rotatably connected to the side wall of the fixing block (13).

2. The planetary gear reducer with noise reduction function according to claim 1, characterized in that: The sealing assembly includes a sealing ring (14), the sidewall of which is slidably connected inside the reducer body (1), and the inner wall of the sealing ring (14) is attached to the sidewall of the rotating shaft (2).

3. A planetary gear reducer with noise reduction function according to claim 1, characterized in that: The side wall of the fixing block (13) is slidably connected to the inside of the fixing sleeve (10). A compression spring (11) is provided inside the fixing sleeve (10). One end of the compression spring (11) is fixedly connected to the inside of the fixing sleeve (10), and the other end of the compression spring (11) is fixedly connected to the side wall of the card block (12).

4. A planetary gear reducer with noise reduction function according to claim 1, characterized in that: Both the first noise reduction shell (3) and the second noise reduction shell (4) are provided with aluminum foam (5), and a sealing gasket (7) is provided between the first noise reduction shell (3) and the second noise reduction shell (4).

5. A planetary gear reducer with noise reduction function according to claim 2, characterized in that: The sealing ring (14) has two sealing lips (15) on its side wall, and both sealing lips (15) are slidably connected to the inside of the reducer body (1).

6. A planetary gear reducer with noise reduction function according to claim 5, characterized in that: The sealing ring (14) is provided with an annular spring (16) inside, and the inner wall of the sealing ring (14) is provided with an O-ring seal (18), and the side wall of the O-ring seal (18) is attached to the side wall of the rotating shaft (2).

7. A planetary gear reducer with noise reduction function according to claim 6, characterized in that: The inner wall of the sealing ring (14) is fixedly connected with a first flange (17) and a second flange (19), and the side walls of the first flange (17) and the second flange (19) are both attached to the side wall of the rotating shaft (2).

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