Impact-resistant bearing outer race

Abstract

The utility model discloses an anti-impact bearing outer ring, including the outer ring main part, ball groove, support ring and the body, wherein the outer ring main part is annular structure, and its inner peripheral surface is equipped with ball groove, and the support ring is sleeved in the outer peripheral surface of outer ring main part, and the body is arranged between the outer ring main part and support ring, and is connected with both fixed, the body is elastic grid structure, is used to absorb the impact load or vibration energy that bearing generates in the operation process. The inner side surface of ball groove is provided with hardening coating or lubricating coating to improve the wear resistance and lubricating property of the rolling contact surface. The structure introduces the buffer energy absorption layer and the functional surface coating, and the impact resistance and the service life of bearing outer ring are improved significantly, and are applicable to the rolling bearing application under the heavy load, high speed and high vibration environment.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology, specifically to an impact-resistant bearing outer ring. Background Technology

[0002] Rolling bearings are among the most commonly used support and rotational components in modern mechanical equipment, and are widely used in high-speed, high-load, and high-precision applications. Their outer rings typically serve as the load-bearing body, needing to withstand radial forces, axial forces, and impact stresses during installation and assembly. Their structural strength and stability directly affect the operational reliability and service life of the entire system.

[0003] In existing technologies, typical bearing outer ring structures are mostly made of integral steel forging followed by heat treatment. While they offer high compressive strength and rolling precision, they are prone to localized stress concentration when subjected to sudden impacts or severe vibration loads. This can lead to failures such as micro-cracks, spalling, or even structural damage in the raceway. For example, existing rolling bearing outer rings with buffer rings, although incorporating elastic components to reduce impact transmission, suffer from relatively rigid buffer rings that cannot balance support stiffness and energy absorption, resulting in poor structural adaptability.

[0004] On the other hand, existing ball bearing groove friction pair structures mostly use metal-to-metal contact, which is prone to accelerated wear due to lubrication failure or contact fatigue during high-frequency reciprocating rolling or dry operation, leading to raceway surface peeling or excessive temperature rise, thereby affecting the performance stability of the entire bearing system. Currently, some technologies have attempted to coat the raceway surface with coatings to improve wear resistance, such as DLC coatings and nitride coatings, but there is still a lack of design concepts that integrate them with the structural buffer system.

[0005] Therefore, how to introduce an efficient buffer energy absorption structure while ensuring the outer ring support stiffness, and at the same time combine the ball groove coating technology to improve the wear resistance of the friction pair, has become a technical problem that urgently needs to be solved in the current bearing outer ring design. Utility Model Content

[0006] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0007] Therefore, the technical solution adopted by this utility model is as follows: an impact-resistant bearing outer ring, comprising: an outer ring body, ball grooves, a support ring, and a bearing body. The outer ring body is an integral ring structure with ball grooves on its inner circumferential surface; the support ring is sleeved on the outer circumferential surface of the outer ring body; the bearing body is disposed between the outer ring body and the support ring, and is connected and fixed to both, for absorbing impact loads and providing structural buffer support.

[0008] In a preferred embodiment, the bearing body is further configured as follows: it is an elastic mesh structure composed of interlaced circumferential reinforcing ribs and radial connecting ribs. This structure can undergo elastic deformation under impact, effectively absorbing impact loads or vibration energy during bearing operation and preventing direct transmission to the outer ring body, thereby improving the impact resistance of the bearing structure and extending its service life.

[0009] In a preferred embodiment, the support is further configured such that it is made of a modified polyurethane elastomer material, possessing excellent elastic recovery and fatigue resistance. Its volume fraction porosity is set to 40% to 70%, and the wall thickness at the grid nodes is 1.5 to 2 times the wall thickness of the connecting ribs. This optimizes the load-bearing path and energy dissipation mechanism from a structural mechanics perspective, specifically improving buffer energy absorption efficiency and long-term reliability.

[0010] In a preferred embodiment, the support ring is further configured such that it is made of fiber-reinforced resin composite material, which has the advantages of being lightweight, high-strength, and corrosion-resistant. Its inner surface is provided with circumferential positioning grooves, which fit into the outer surface of the support body, thereby enhancing the positioning accuracy and assembly stability between components and preventing performance degradation due to relative displacement during operation.

[0011] In a preferred embodiment, the outer ring body is further configured such that: the outer peripheral surface of the outer ring body is provided with at least one positioning groove, and the inner side of the support body is provided with a positioning flange. The two mesh to form a radial and axial bidirectional positioning constraint, which specifically prevents the support body from structural misalignment under high-frequency vibration or high-speed rotation and improves system stability.

[0012] In a preferred embodiment, the inner surface of the ball groove is further configured to have a hardened coating or a lubricating coating. The hardened coating is a titanium nitride (TiN) layer formed by physical vapor deposition, with a coating thickness of 0.5 micrometers to 3 micrometers, which specifically enhances the surface hardness and wear resistance of the raceway surface and extends the fatigue life of the rolling pair.

[0013] In a preferred embodiment, the lubricating coating is further configured as follows: the lubricating coating is a diamond-like carbon (DLC) coating with a surface roughness Ra of less than or equal to 0.2 micrometers, which has excellent low friction performance, specifically reducing the rolling friction coefficient, slowing down running wear, and improving transmission efficiency.

[0014] In a preferred embodiment, the surface of the ball groove is further configured such that it is subjected to plasma activation treatment before the coating is formed. The treatment effect is such that the shear adhesion force between the coating and the metal substrate is not less than 30 MPa, which specifically improves the adhesion of the coating and avoids local damage or fatigue sources caused by peeling during long-term operation.

[0015] In summary, this utility model effectively absorbs external impact and vibration energy by setting an elastic mesh-like support between the outer ring body and the support ring, thereby improving the overall impact resistance of the structure. Furthermore, by setting a hardened or lubricating coating on the surface of the ball groove, the wear resistance and lubrication effect of the rolling contact surface are further enhanced, significantly improving the operational reliability and lifespan of the bearing system under extreme conditions such as heavy load, high speed, and high vibration.

[0016] The beneficial effects achieved by this utility model are as follows:

[0017] 1. In this utility model, by setting a bearing with a mesh buffer structure between the outer ring body and the support ring, the impact load or vibration energy received by the bearing during operation can be effectively absorbed, significantly improving the impact resistance and service life of the outer ring structure. It is especially suitable for rolling bearing applications under heavy load, high vibration or high speed conditions.

[0018] 2. In this utility model, by providing a hardened coating or a lubricating coating on the inner side of the ball groove, the wear resistance and fatigue resistance of the raceway surface can be significantly improved, while reducing the rolling friction coefficient, effectively reducing the wear and energy consumption of the rolling pair, extending the overall service life of the bearing and improving operational reliability. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model;

[0020] Figure 2 This is a cross-sectional structural diagram of one embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the outer ring main structure of one embodiment of the present utility model.

[0022] Figure label:

[0023] 100. Outer ring body; 110. Ball groove; 200. Support ring; 210. Bearing body. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0025] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0026] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing an impact-resistant bearing outer ring.

[0027] Combination Figures 1-3As shown, the impact-resistant bearing outer ring provided by this utility model includes an outer ring body 100, a ball groove 110, a support ring 200, and a bearing body 210.

[0028] The outer ring body 100 has an annular structure, and its inner circumferential surface is provided with a ball groove 110 for accommodating rolling elements. The ball groove 110 has an inner surface for contacting the rolling elements. This surface can be coated with a hardened coating or a lubricating coating according to the specific design to improve the wear resistance and lubrication performance of the raceway area, thereby improving the overall machine's operational stability and lifespan. The ball groove 110, as part of the rolling pair, is an important friction contact area of ​​this structure.

[0029] The support ring 200 is sleeved on the outer circumferential surface of the outer ring body 100, forming a covering structure with its outer side. The support ring 200 is used to provide external structural support and enhance overall rigidity.

[0030] The bearing 210 is disposed between the outer ring body 100 and the support ring 200, and is connected and fixed to both the outer ring body 100 and the support ring 200. Preferably, the bearing 210 adopts an elastic mesh structure, which can deform to a certain extent when subjected to external impact loads or vibrations, thereby absorbing some energy and reducing the impact transmission intensity. Specifically, the mesh structure of the bearing 210 is composed of interlaced circumferential reinforcing ribs and radial connecting ribs. This structural design is beneficial for improving buffering performance and structural stability, and is especially suitable for bearing applications in harsh working environments such as high speed, heavy load, and high frequency vibration.

[0031] Furthermore, the inner surface of the ball groove 110 can be provided with a hardened coating or a lubricating coating. The hardened coating is preferably a titanium nitride (TiN) layer formed by physical vapor deposition (PVD), with a coating thickness controlled between 0.5 micrometers and 3 micrometers, which can effectively enhance the surface hardness and wear resistance of the ball groove 110 and improve the rolling contact fatigue life.

[0032] Alternatively, the lubricating coating is a diamond-like carbon (DLC) coating with a surface roughness Ra preferably less than or equal to 0.2 micrometers. It has excellent lubricity and wear resistance, which can further reduce the coefficient of friction between rolling pairs and inhibit the formation of wear debris, thereby improving the overall operating efficiency of the machine.

[0033] To enhance the bonding strength of the coating, it is preferable to perform plasma activation treatment on the inner surface of the ball groove 110 before the coating is formed, so that the shear adhesion force between the coating and the substrate surface is not less than 30 MPa, ensuring good adhesion performance even under long-term high-load operation.

[0034] Regarding material selection, the support body 210 is preferably made of modified polyurethane elastomer material, which has good elastic modulus and fatigue resistance, and is suitable for long-term repeated deformation applications. Its internal opening structure is a three-dimensional mesh, with the volume fraction of the opening ratio set between 40% and 70%. The wall thickness at the nodes is 1.5 to 2 times the wall thickness of the connecting ribs, in order to ensure the synergistic effect of the structure's elastic recovery capability and buffer function after being subjected to stress.

[0035] The support ring 200 is preferably made of fiber-reinforced resin composite material, which has high specific strength and corrosion resistance. Its inner surface is machined with multiple circumferential positioning grooves for precise fitting with the outer surface of the support body 210. Through this structural design, a reliable fitting interface is formed between the support ring 200 and the support body 210, further improving assembly accuracy and stability.

[0036] In addition, to further achieve overall positioning of the structure, the outer peripheral surface of the outer ring body 100 is provided with at least one positioning groove. Correspondingly, the inner side of the support body 210 is provided with a positioning flange. The positioning flange engages with the positioning groove to achieve relative fixation in the radial and axial directions, preventing relative displacement under high-frequency vibration or centrifugal force.

[0037] Through the above structural design and material selection, this utility model can effectively enhance the impact resistance of the outer ring of the rolling bearing under complex working conditions, extend its service life, and improve the reliability and stability of the whole machine operation.

[0038] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An impact resistant bearing outer race characterized by, The device includes an outer ring body (100), a ball groove (110), a support ring (200), and a support body (210). The outer ring body (100) is an annular structure with the ball groove (110) on its inner circumferential surface. The support ring (200) is fitted onto the outer circumferential surface of the outer ring body (100). The support body (210) is disposed between the outer ring body (100) and the support ring (200) and is connected and fixed to both. The support body (210) is an elastic mesh structure. The inner surface of the ball groove (110) is provided with a hardened coating or a lubricating coating to improve the wear resistance and lubrication performance of the rolling contact surface.

2. The impact-resistant bearing outer ring according to claim 1, characterized in that, The hardened coating on the ball groove (110) is a titanium nitride (TiN) layer formed by physical vapor deposition, with a coating thickness of 0.5 μm to 3 μm.

3. The impact-resistant bearing outer ring according to claim 1, characterized in that, The lubricating coating on the ball groove (110) is a diamond-like carbon coating (DLC) with a surface roughness Ra less than or equal to 0.2 μm.

4. The impact-resistant bearing outer ring according to claim 1, characterized in that, The support (210) is made of modified polyurethane elastomer, and its grid structure is composed of circumferential reinforcing ribs and radial connecting ribs.

5. The impact-resistant bearing outer ring according to claim 1, characterized in that, The support ring (200) is made of fiber-reinforced resin composite material, and its inner surface is provided with circumferential positioning grooves, which fit into the outer surface of the support body (210).

6. The impact-resistant bearing outer ring according to claim 1, characterized in that, The surface of the ball groove (110) is subjected to plasma activation treatment before the coating is formed to improve the bonding strength of the coating, and its shear adhesion force is not less than 30 MPa.

7. The impact-resistant bearing outer ring according to claim 1, characterized in that, The volume fraction of the support (210) is 40% to 70%, and the wall thickness at the grid nodes is 1.5 to 2 times the wall thickness of the connecting ribs.

8. The impact-resistant bearing outer ring according to claim 1, characterized in that, The outer ring body (100) has at least one positioning groove on its outer peripheral surface, and the inner side of the support (210) is provided with a positioning flange. The positioning flange engages with the positioning groove to achieve radial and axial positioning.

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