A noise reduction structure of a high-precision planetary reducer

Abstract

The utility model belongs to the technical field of noise reduction structure, especially a high accuracy planetary reducer's noise reduction structure, including bolt assembly adaptive shape's casing, one end of casing inserts input shaft, the other end of casing inserts transmission shaft, one end fixedly connected with bearing sleeve of input shaft, one end extension side fixedly connected rotation has rotation tooth of bearing sleeve, rotation tooth engages transmission and is connected in transmission gear ring, one end surface fixedly connected with drive gear disc of bearing sleeve, one bearing sleeve is connected with a shaft in bearing sleeve. The utility model, through multistage double meshing transmission structure, positioning gear disc accurate limit, low noise bearing adaptation and cast iron casing and damping material combination design, from meshing source, support link to encapsulation level full link noise reduction, both guarantee sub-arc fraction level transmission precision, and significantly reduce vibration noise, adapt high accuracy low noise scene, improve equipment operation stability and use experience.

Description

Technical Field

[0001] This utility model relates to the field of noise reduction structure technology, specifically a noise reduction structure for a high-precision planetary reducer. Background Technology

[0002] In fields such as industrial automation, precision manufacturing, and robotics, high-precision planetary gearboxes serve as core transmission components. Their transmission accuracy and operating noise directly impact the overall performance and user experience of the equipment. With technological advancements, the market's precision requirements for gearboxes have risen to the sub-arc level, while the demand for noise control is becoming increasingly stringent. This is especially true for scenarios with extremely demanding operating environments, such as medical equipment and semiconductor processing equipment, which urgently require low-noise and high-precision transmission solutions.

[0003] Existing high-precision planetary reducers still suffer from excessive noise in practical applications, mainly due to three core issues: First, during gear meshing, the concentrated single-stage meshing load and uneven tooth surface contact easily generate impact vibration and friction noise; second, the unreasonable design of the shaft support structure, with friction loss and axial movement of ordinary bearings and radial component force of gear transmission causing shaft misalignment, further exacerbates vibration and noise; third, the housing is mostly made of a single metal material, which, although possessing a certain rigidity, has insufficient vibration damping and sound insulation performance, and internal transmission vibration is easily radiated outward to form air noise, seriously affecting the compatibility of the equipment.

[0004] Although some reducers attempt to reduce noise by optimizing gear parameters or adding vibration damping pads, they often suffer from an imbalance between noise reduction and precision. Overemphasizing vibration reduction can lead to increased transmission clearance, while maintaining precision makes it difficult to effectively suppress noise, failing to achieve a comprehensive noise reduction design across the entire chain from the meshing source and support components to the packaging structure. Therefore, developing a planetary reducer structure that can maintain high-precision transmission characteristics while systematically reducing operating noise has become a pressing technical challenge for the industry. Utility Model Content

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a noise reduction structure for a high-precision planetary reducer, thus solving the problems mentioned in the background section.

[0006] (II) Technical Solution To achieve the above objectives, this utility model specifically adopts the following technical solution: A noise reduction structure for a high-precision planetary reducer includes a bolt-assembled housing of a suitable shape. One end of the housing is inserted into an input shaft, and the other end is inserted into a transmission shaft. A bearing sleeve is fixedly connected to one end of the input shaft. A rotating gear is fixedly connected to the side of one end of the bearing sleeve, and the rotating gear meshes with and drives a transmission gear ring. A drive gear is fixedly connected to one end face of the bearing sleeve. A shaft is sleeved within the bearing sleeve and fixedly connected to the drive gear. A large gear disk is fixedly connected to the other end of the shaft. A small gear disk rotates coaxially on the side of the large gear disk. The large gear disk and the small gear disk simultaneously mesh with a small gear disk and a large gear disk. The small gear disk and the large gear disk are concentrically fixedly connected to the transmission shaft.

[0007] Furthermore, the transmission gear ring is fixedly installed in the housing.

[0008] Furthermore, the rotating teeth simultaneously mesh on the planes of the transmission gear ring and the drive gear disc.

[0009] Furthermore, the drive shaft is rotatably mounted in the housing.

[0010] Furthermore, the sides of the large gear disk one and the small gear disk two simultaneously engage with the positioning gear disk, which is rotatably connected in the housing.

[0011] Furthermore, in the noise reduction structure of the high-precision planetary reducer, the bearing is a ceramic ball bearing or a high-precision angular contact ball bearing.

[0012] Furthermore, the housing is made of cast iron, and the inner wall is coated with 2–3 mm of polymer damping material.

[0013] (III) Beneficial Effects Compared with the prior art, this utility model provides a noise reduction structure for a high-precision planetary reducer, which has the following beneficial effects: This utility model, through a multi-stage double-meshing transmission structure, precise positioning of the gear plate, low-noise bearing adaptation, and a combination design of cast iron housing and damping materials, reduces noise across the entire chain from the meshing source, support links to the packaging level. It not only ensures the accuracy of sub-arc level transmission, but also significantly reduces vibration noise, making it suitable for high-precision, low-noise scenarios and improving the stability of equipment operation and user experience. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the internal side view structure of this utility model; Figure 3 This is another internal side view diagram of the present invention; Figure 4 This is a schematic diagram of the transmission structure of this utility model; Figure 5 This is a schematic diagram of another transmission structure of this utility model.

[0015] In the diagram: 1. Housing; 2. Input shaft; 3. Drive shaft; 4. Rotating gear; 5. Drive gear ring; 6. Drive gear disc; 7. Large gear disc one; 8. Small gear disc one; 9. Large gear disc two; 10. Small gear disc two; 11. Positioning gear disc. Detailed Implementation

[0016] 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.

[0017] Example like Figure 1-5 As shown in the figure, an embodiment of this utility model proposes a noise reduction structure for a high-precision planetary reducer, including a housing 1 bolted together to fit the shape. One end of the housing 1 is inserted into an input shaft 2, and the other end of the housing 1 is inserted into a transmission shaft 3. A bearing sleeve is fixedly connected to one end of the input shaft 2, and a rotating tooth 4 is fixedly connected to the side of one end of the bearing sleeve. The rotating tooth 4 is meshed and connected to a transmission gear ring 5. A drive gear 6 is fixedly connected to one end face of the bearing sleeve. The rotating tooth 4 simultaneously meshes with the transmission gear ring 5 fixed to the housing 1 and the drive gear 6 on the end face of the bearing sleeve, forming a double-meshing positioning structure. This structure disperses the meshing impact force through multi-tooth contact and limits radial movement during transmission, ensuring the transmission accuracy on the input side. The fixed configuration of the transmission gear ring 5 provides a stable meshing reference for the rotating tooth 4, avoiding meshing clearance fluctuations caused by gear ring displacement and reducing impact noise. The bearing sleeve contains a shaft, which is fixedly connected to the drive gear disk 6. The shaft extends to the other end and is fixedly connected to a large gear disk 7. The side of the large gear disk 7 rotates coaxially with a small gear disk 8. The large gear disk 7 and the small gear disk 8 simultaneously mesh with the small gear disk 10 and the large gear disk 9. The large gear disk 7 and the small gear disk 8 rotate synchronously and coaxially, respectively meshing with the large gear disk 9 and the small gear disk 10, forming a two-stage meshing transmission structure. By transmitting torque in stages, the single-stage meshing load is reduced, and tooth surface friction and impact vibration are reduced. At the same time, the two-stage meshing increases the overlap ratio, making the transmission process smoother and further suppressing meshing noise. The small gear disk 10 and the large gear disk 9 are concentrically fixedly connected to the transmission shaft 3; the positioning gear disk 11 meshes bidirectionally with the large gear disk 7 and the small gear disk 10 to form an intermediate positioning support structure, which counteracts the radial component force during the transmission process, avoids uneven tooth surface contact caused by gear eccentricity, reduces vibration and noise caused by local overload, and at the same time ensures the coaxiality of the shafts of each gear and maintains high-precision transmission performance.

[0018] Input shaft 2 drives the fixedly connected bearing sleeve to rotate. The rotating teeth 4 on the side of the bearing sleeve mesh with the transmission gear ring 5 fixed to the housing 1. At the same time, the rotating teeth 4 mesh with the drive gear 6 on the end face of the bearing sleeve. The drive gear 6 drives the large gear 7 to rotate through the shaft. The small gear 8, which is coaxially arranged on the side of the large gear 7, rotates synchronously with it. The two mesh with the small gear 10 and the large gear 9 respectively. The small gear 10 and the large gear 9 are concentrically fixed to the transmission shaft 3 and drive it to output power. During this period, the large gear 7 and the small gear 10 mesh with the positioning gear 11 rotatably connected in the housing 1 to ensure transmission stability. The housing 1 is made of cast iron and the inner wall is sprayed with 2-3mm of high polymer damping material. Combined with the low noise characteristics of ceramic ball bearings or high-precision angular contact ball bearings, it suppresses vibration and noise radiation while achieving high-precision transmission.

[0019] like Figure 2 As shown, in some embodiments, the transmission gear ring 5 is fixedly installed in the housing 1; it provides a stable meshing reference for the rotating gear 4, limits the displacement and wobbling of the gear ring during transmission, avoids impact noise caused by meshing gap fluctuations, and forms a rigid support linkage with the cast iron housing 1, thereby increasing the natural frequency of the overall structure, suppressing resonance, and ensuring the coaxiality and accuracy stability of the multi-stage meshing transmission.

[0020] like Figure 2 As shown, in some embodiments, the rotating tooth 4 simultaneously meshes with the transmission gear ring 5 and the drive gear disk 6 plane; forming a double meshing positioning structure, which not only disperses the meshing impact force through multi-tooth contact to reduce vibration and noise, but also limits the radial movement of the transmission components, ensuring the stability of the meshing gap between the input side and the intermediate transmission link, thereby improving the overall transmission accuracy and running stability.

[0021] like Figure 2 As shown, in some embodiments, the drive shaft 3 is rotatably mounted in the housing 1; with the rigid support of the housing 1 and the precise positioning of the built-in bearing, its coaxiality with the input shaft 2 and the meshing gears of each stage is ensured, reducing the axial movement and off-center load during rotation, which not only maintains the accuracy and stability of the multi-stage transmission, but also reduces the vibration and noise caused by shaft sway.

[0022] like Figure 4As shown, in some embodiments, the sides of the large gear disk 7 and the small gear disk 10 simultaneously mesh with the positioning gear disk 11, which is rotatably connected in the housing 1; forming a bidirectional positioning support structure, which not only counteracts the radial component force during transmission and avoids uneven tooth surface contact and local overload noise caused by gear misalignment, but also ensures the coaxiality of the shafts of each gear through the rigid limit of the positioning gear disk 11, further improving transmission accuracy and running stability.

[0023] like Figure 4 As shown, in some embodiments, the bearings in the noise reduction structure of the high-precision planetary reducer are ceramic ball bearings or high-precision angular contact ball bearings; with their low friction and low vibration characteristics, they reduce frictional noise and axial movement when the shaft rotates. At the same time, the preload design eliminates bearing clearance and avoids impact vibration, which not only ensures the accurate positioning of multi-stage meshing transmission, but also suppresses the generation and transmission of vibration noise from the support link.

[0024] like Figure 3 As shown, in some embodiments, the housing 1 is made of cast iron, and the inner wall is coated with 2-3mm of polymer damping material. The high rigidity of the cast iron provides stable rigid support for components such as the transmission gear ring 5 and the positioning gear plate 11, and increases the natural frequency of the overall structure to suppress resonance. The polymer damping material can efficiently absorb the vibration energy of the internal transmission components, reduce the transmission of vibration to the surface of the housing 1 and noise radiation. The two work together to achieve "rigid support + vibration reduction and sound insulation", further reducing the overall noise from the packaging stage.

[0025] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the 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 this utility model should be included within the protection scope of this utility model.

Claims

1. A noise reduction structure for a high-precision planetary reducer, comprising a bolt-assembled housing (1) adapted to the shape, characterized in that: One end of the housing (1) is inserted into the input shaft (2), and the other end of the housing (1) is inserted into the transmission shaft (3). One end of the input shaft (2) is fixedly connected to a bearing sleeve. One end of the bearing sleeve extends to the side and is fixedly connected to a rotating tooth (4). The rotating tooth (4) meshes and is connected to the transmission gear ring (5). One end face of the bearing sleeve is fixedly connected to a drive gear disc (6). A shaft is sleeved in the bearing sleeve and is fixedly connected to the drive gear disc (6). The shaft extends to the other end and is fixedly connected to a large gear disc (7). The side of the large gear disc (7) rotates coaxially with a small gear disc (8). The large gear disc (7) and the small gear disc (8) mesh simultaneously with a small gear disc (10) and a large gear disc (9). The small gear disc (10) and the large gear disc (9) are concentrically fixedly connected to the transmission shaft (3).

2. The noise reduction structure of a high-precision planetary reducer according to claim 1, characterized in that: The transmission gear ring (5) is fixedly installed in the housing (1).

3. The noise reduction structure of a high-precision planetary reducer according to claim 1, characterized in that: The rotating tooth (4) simultaneously meshes on the planes of the transmission gear ring (5) and the drive gear disc (6).

4. The noise reduction structure of a high-precision planetary reducer according to claim 1, characterized in that: The drive shaft (3) is rotatably mounted in the housing (1).

5. The noise reduction structure of a high-precision planetary reducer according to claim 1, characterized in that: The sides of the large gear disk 1 (7) and the small gear disk 2 (10) simultaneously mesh with the positioning gear disk (11), and the positioning gear disk (11) is rotatably connected in the housing (1).

6. The noise reduction structure of a high-precision planetary reducer according to claim 1, characterized in that: The bearings in the noise reduction structure of the high-precision planetary reducer are ceramic ball bearings or high-precision angular contact ball bearings.

7. The noise reduction structure of a high-precision planetary reducer according to claim 1, characterized in that: The housing (1) is made of cast iron, and the inner wall is coated with 2–3 mm of polymer damping material.

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