Small-size noise-reduction oil bearing
By introducing micropores, annular grooves and O-ring structures into oil-containing bearings, and combining the design of straight hole sections and expanded hole sections, the problem of deformation and impact noise caused by small and medium-sized motor shafts was solved, achieving a technical effect of lower noise.
Patent Information
- Application Number
- CN202422960395.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-12-02
AI Technical Summary
When the rotor of a small or medium-sized DC motor rotates, the shaft deforms and rubs against the bearing, generating noise. Existing oil-containing bearings lack a buffer structure, resulting in high noise levels, making it difficult to effectively reduce the noise by increasing shaft strength.
A small-volume, noise-reducing, oil-containing bearing is designed. The bearing body has micropores and annular grooves, and is equipped with O-rings to provide buffering and vibration absorption. A straight hole section and an expanded hole section are set in the center of the bearing body to reduce the risk of external shaft vibration and friction.
It effectively reduces the noise of small and medium-sized motors, provides buffering and vibration absorption through the O-ring, reduces noise transmission, and avoids external shaft vibration through the expanded hole section to achieve a lower noise effect.
Smart Images
Figure CN223359703U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of bearings, and more specifically to a small-volume, noise-reducing, oil-containing bearing. Background Art
[0002] Oil-containing bearings are a type of sintered body made using powder metallurgy and have multiple micropores. By immersing this porous sintered body in lubricating oil, the micropores contain lubricating oil. They have the advantages of low cost, vibration absorption, low noise, and the ability to operate for a long time without the need for lubricating oil. They are particularly suitable for working environments where lubrication is difficult or oil contamination is not allowed.
[0003] When the rotor of a current small and medium-sized DC motor rotates, if the shaft is deformed and bent, it will collide and rub against the bearings, generating a lot of noise. For a long time, reducing the noise generated by the collision and friction between the deformed shaft and the bearings has been one of the important research topics for engineering and technical personnel. It is generally believed that the main factor that causes the shaft to deform and collide and rub against the bearings to generate noise is the insufficient strength of the shaft, which causes the shaft to deform and generate friction with the bearings. However, during the rotational motion, even the strongest shaft will inevitably deform, but the greater the strength, the smaller the deformation. In small and medium-sized DC motors, the overall size and strength of the shaft will be limited due to the small overall size of the motor. Therefore, in small and medium-sized DC motors, attempts to reduce the deformation of the shaft by increasing the strength of the shaft to achieve the effect of reducing noise have little effect. There is currently an oil-containing bearing, such as Figure 1 As shown, it includes a bearing body 90, the outer side wall of the bearing body 90 is smooth and fits with the hole wall of the external bearing hole 91, and the bearing body 90 has an assembly hole 92, which cooperates with the external shaft body 93. When the external shaft body 93 is deformed and contacts the bearing body 90, there is no buffer between the bearing body 90 and the external bearing hole 91, resulting in relatively loud noise.
[0004] Therefore, there is a need to provide a small-volume, noise-reducing, oil-containing bearing that is suitable for small and medium-sized motors and has low noise. Summary of the Invention
[0005] The main purpose of this application is to provide a small-volume noise-reducing oil-containing bearing, wherein the small-volume noise-reducing oil-containing bearing includes a bearing body and an O-ring, the bearing body has a plurality of micropores, and oil is stored in the micropores. The middle section of the outer wall of the bearing body has an annular groove, and the O-ring is sleeved in the annular groove. By arranging the O-ring, a buffering and vibration-absorbing effect is provided between the bearing body and the outer bearing hole wall. Compared with the existing technology, the small-volume noise-reducing oil-containing bearing has the advantages of being suitable for small and medium-sized motors and having less noise.
[0006] Another object of the present application is to provide a small-volume, noise-reducing, oil-containing bearing, wherein the center of the bearing body has an assembly hole, and the assembly hole includes a straight hole section and two expanded hole sections. The two ends of the straight hole section are respectively connected to the two expanded hole sections, and the expanded holes of the two expanded hole sections are in opposite directions. By setting the expanded hole section, the risk of contact with the expanded hole section when the external shaft vibrates is reduced.
[0007] In order to achieve at least one of the above-mentioned invention objectives, the present application provides a small-volume, noise-reducing, oil-containing bearing, wherein the small-volume, noise-reducing, oil-containing bearing comprises:
[0008] a bearing body, the bearing body having a plurality of micropores, the micropores containing oil, and an annular groove in the middle section of the outer wall of the bearing body; and
[0009] An O-ring is sleeved in the annular groove.
[0010] In one or more embodiments of the present application, the center of the bearing body has an assembly hole, and the assembly hole includes a straight hole section and two expanded hole sections. The two ends of the straight hole section are respectively connected to the two expanded hole sections, and the expanded holes of the two expanded hole sections are in opposite directions.
[0011] In one or more embodiments of the present application, the hole depth of the straight hole section is greater than 2 mm, and the hole depth of the straight hole section is less than half of the length of the bearing body.
[0012] In one or more embodiments of the present application, the distance between the hole wall of the straight hole section and the bottom of the annular groove is greater than 2 mm.
[0013] In one or more embodiments of the present application, the notch edge of the annular groove has a first chamfer.
[0014] In one or more embodiments of the present application, both ends of the bearing body have a second chamfer.
[0015] In one or more embodiments of the present application, the straight hole section has a wear-resistant coating.
[0016] In an embodiment of the present application, a small-volume noise-reducing oil-containing bearing includes a bearing body and an O-ring. The bearing body has a plurality of micropores, in which oil is stored. The middle section of the outer wall of the bearing body has an annular groove, and the O-ring is sleeved in the annular groove. By arranging the O-ring, a buffering and vibration-absorbing effect is provided between the bearing body and the outer bearing hole wall. Compared with the existing technology, the small-volume noise-reducing oil-containing bearing has the advantages of being suitable for small and medium-sized motors and having lower noise. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] These and / or other aspects and advantages of the present application will become more clear and easier to understand from the following detailed description of the embodiments of the present application in conjunction with the accompanying drawings, in which:
[0018] Figure 1 The figure shows a structural diagram of an existing oil-containing bearing;
[0019] Figure 2 The figure shows a structural schematic diagram of a small-volume noise-reducing oil-containing bearing of the present application;
[0020] Figure 3 The figure shows a cross-sectional view of a small-volume noise-reducing oil-containing bearing of the present application. DETAILED DESCRIPTION
[0021] The terms and words used in the following description and claims are not limited to the literal meanings, but are merely used by the inventor to enable a clear and consistent understanding of the present application. Therefore, it will be apparent to those skilled in the art that the following description of various embodiments of the present application is provided for illustration purposes only and not for the purpose of limiting the present application as defined by the appended claims and their equivalents.
[0022] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity.
[0023] Although ordinal numbers such as "first," "second," and the like will be used to describe various components, these are not intended to limit those components. The terms are used solely to distinguish one component from another. For example, a first component could be referred to as a second component, and similarly, a second component could be referred to as a first component without departing from the teachings of the utility model. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.
[0024] The terms used herein are for the purpose of describing various embodiments only and are not intended to be limiting. As used herein, the singular is intended to include the plural, unless the context clearly indicates otherwise. It will also be understood that the terms "comprising" and / or "having" when used in this specification specify the presence of a stated feature, number, step, operation, component, element, or combination thereof, and do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, elements, or groups thereof.
[0025] Schematic small volume noise reduction oil bearing, reference Figures 2 to 3 According to a preferred embodiment of the present invention, a small-volume, noise-reducing, oil-containing bearing includes a bearing body 10 and an O-ring 20.
[0026] Specifically, the bearing body 10 has a plurality of micropores, and lubricating oil is stored in the micropores through an oil immersion process. The middle section of the outer wall of the bearing body 10 has an annular groove 101, and the O-ring 20 is sleeved in the annular groove 101.
[0027] In addition, the center of the bearing body 10 has an assembly hole 102, and the assembly hole 102 includes a straight hole section 1021 and two expanded hole sections 1022. The two ends of the straight hole section 1021 are respectively connected to the two expanded hole sections 1022, and the expanded holes of the two expanded hole sections 1022 are in opposite directions.
[0028] It should be noted that when using the small-volume, noise-reducing, oil-containing bearing, the outer wall of the bearing body 10 is in contact with the wall of the external bearing hole, and the O-ring 20 is also in contact with the wall of the external bearing hole. Furthermore, the external shaft passes through the assembly hole 102, and the side wall of the external shaft is in contact with the straight hole section 1021 of the assembly hole 102. It should also be noted that when the external shaft deforms and vibrates, exerting an impact force on the bearing body 10, the O-ring 20 provides a buffering and vibration-absorbing area between the bearing body 10 and the wall of the external bearing hole, helping to reduce noise and limit noise transmission, thereby achieving the purpose of reducing noise. Furthermore, when the external shaft vibrates due to deformation, the two reaming sections 1022 provide space for the external shaft to avoid collision and friction with the reaming sections 1022 during deformation and vibration, thereby achieving the technical purpose of reducing noise. Clearly, compared to the prior art, the present application has the advantages of being suitable for small and medium-sized motors and having lower noise.
[0029] Furthermore, in the embodiment of the present application, the hole depth of the straight hole section 1021 is greater than 2 mm, the length of the bearing body is greater than 4 mm, and the hole depth of the straight hole section 1021 is less than half of the length of the bearing body 10.
[0030] In addition, the distance between the hole wall of the straight hole section 1021 and the bottom of the annular groove 101 is greater than 2 mm.
[0031] Furthermore, because the maximum radial dimension of the O-ring 20 is greater than that of the bearing body 10, when the bearing body 10, fitted with the O-ring 20, is placed in the external bearing hole, the edges of the annular groove 101 each have a first chamfer 1011 to provide a certain amount of space for the O-ring 20 to deform under pressure. Furthermore, one of the purposes of providing the O-ring 20 is to create a gap between the O-ring and the annular groove 101 in its undeformed state, allowing the gap to be filled after the O-ring is deformed.
[0032] Furthermore, in order to facilitate the insertion of the bearing body 10 into the external bearing hole, both ends of the bearing body 10 have a second chamfer 103 .
[0033] Furthermore, since in the present application, the overall length of the straight hole section 1021 is shorter than that of the prior art, in order to improve the wear resistance of the straight hole section 1021, the straight hole section 1021 has a wear-resistant coating (not shown in the figure), and the wear-resistant coating is sprayed on the straight hole section 1021 by thermal spraying.
[0034] In summary, the small-volume noise-reducing oil-containing bearing according to the embodiment of the present application is explained, which provides the small-volume noise-reducing oil-containing bearing with advantages such as suitability for small and medium-sized motors and low noise.
[0035] It is worth mentioning that in the embodiments of this application, the small-volume, noise-reducing, oil-containing bearing has a simple structure, does not involve complex manufacturing processes and expensive materials, and is highly economical. Furthermore, for manufacturers, the small-volume, noise-reducing, oil-containing bearing provided in this application is easy to produce and low in cost, which is more conducive to controlling production costs and further promoting product promotion and use.
[0036] Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are provided for illustrative purposes only and are not intended to limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and illustrated in the embodiments. Any variations or modifications may be made to the embodiments of the present invention without departing from these principles.
Claims
1. A small-volume, noise-reducing, oil-containing bearing, characterized by: The small-volume noise-reducing oil-containing bearing includes a bearing body, the bearing body having a plurality of micropores, the micropores containing oil, and an annular groove in the middle section of the outer wall of the bearing body; and An O-ring is sleeved in the annular groove.
2. The small-volume, noise-reducing, oil-containing bearing according to claim 1, characterized in that: The center of the bearing body has an assembly hole, which includes a straight hole section and two expanded hole sections. The two ends of the straight hole section are respectively connected to the two expanded hole sections, and the expanded holes of the two expanded hole sections are in opposite directions.
3. The small-volume, noise-reducing, oil-containing bearing according to claim 2, characterized in that: The hole depth of the straight hole section is greater than 2 mm, and the hole depth of the straight hole section is less than half of the length of the bearing body.
4. The small-volume, noise-reducing, oil-containing bearing according to claim 3, characterized in that: The distance between the hole wall of the straight hole section and the bottom of the annular groove is greater than 2 mm.
5. The small-volume, noise-reducing, oil-containing bearing according to any one of claims 2 to 4, characterized in that: The notch edge of the annular groove has a first chamfer.
6. The small-volume, noise-reducing, oil-containing bearing according to claim 5, characterized in that: Both ends of the bearing body have a second chamfer.
7. The small-volume, noise-reducing, oil-containing bearing according to claim 6, characterized in that: The straight hole section has a wear-resistant coating.