A quickly mountable bearing collar

Abstract

The utility model belongs to bearing technical field, concretely is a kind of bearing shaft ring of quick installation, including bearing inner race main bearing, its characterized in that, the inside coaxial nesting of bearing inner race main bearing has multilayer composite inner race bearing, the multilayer composite inner race bearing is composed of high heat conduction metal layer bearing in outer layer, memory alloy layer bearing in middle layer and wear-resistant alloy layer bearing in inner layer;Multilayer composite inner race bearing and bearing inner race main bearing are connected by interference fit between them.The utility model is by being provided with multilayer composite inner race bearing in the inside of bearing inner race main bearing, not only can replace bearing inner race main bearing to complete with the fixation of shaft body, improve installation speed, and also can carry out size compensation to the bearing inner race main bearing of size larger, to make it can be fixed on the shaft body of size slightly smaller, greatly improve the practicality of bearing inner race main bearing.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology, specifically to a bearing ring that can be quickly installed. Background Technology

[0002] Bearings are an important component in modern mechanical equipment. Their main function is to support rotating mechanical parts, reduce the coefficient of friction during their movement, and ensure their rotational accuracy.

[0003] Traditional bearing installation requires heating the entire bearing to over 90°C, which results in high energy consumption, slow cooling, and a tendency for bearing annealing and deformation. This is especially problematic for large bearings, where ensuring uniform heating is difficult and stringent diameter tolerances are required. Existing technologies have attempted to use split-type bearing rings, but these suffer from low thermal conductivity, delayed thermal response, and poor creep resistance. Therefore, we propose a bearing ring that can be installed quickly. Utility Model Content

[0004] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0005] Therefore, the technical solution adopted by this utility model is as follows: A quick-installable bearing ring includes an inner ring main bearing, characterized in that a multi-layer composite inner ring bearing is coaxially nested inside the inner side of the inner ring main bearing. The multi-layer composite inner ring bearing consists of an outer high thermal conductivity metal layer bearing, a middle shape memory alloy layer bearing, and an inner wear-resistant alloy layer bearing. The multi-layer composite inner ring bearing is connected to the inner ring main bearing by an interference fit, and the axial length of the multi-layer composite inner ring bearing is less than half that of the inner ring main bearing.

[0006] In a preferred embodiment, the present invention can be further configured such that the high thermal conductivity metal layer bearing adopts a copper alloy layer, the thickness of which accounts for 20%-30% of the total thickness of the multi-layer composite inner ring bearing.

[0007] In a preferred embodiment, the present invention can be further configured such that the shape memory alloy layer bearing adopts a nickel-titanium alloy layer, the thickness of which accounts for 40%-50% of the total thickness of the multi-layer composite inner ring bearing.

[0008] In a preferred embodiment, the present invention can be further configured such that the wear-resistant alloy layer bearing adopts a nitrided steel layer, the thickness of which accounts for 20%-30% of the total thickness of the multi-layer composite inner ring bearing.

[0009] In a preferred embodiment, the present invention can be further configured such that tapered guide bearings are provided at both ends of the multilayer composite inner ring bearing.

[0010] In a preferred embodiment, the present invention can be further configured such that the inner surface of the wear-resistant alloy layer is provided with an anti-slip bearing.

[0011] In a preferred embodiment, the present invention can be further configured such that: the mating surfaces of the inner ring main bearing and the multi-layer composite inner ring bearing are provided with axially arranged positioning boss bearings, and the multi-layer composite inner ring bearings are provided with matching annular groove bearings at corresponding positions.

[0012] The above-mentioned technical solution of this utility model has the following beneficial technical effects: 1. This utility model improves heat transfer efficiency by more than 3 times through the high thermal conductivity of the copper alloy outer bearing, greatly reducing the heating time of the bearing ring and solving the problems of high overall heating energy consumption and slow speed.

[0013] 2. This utility model utilizes the superelasticity and controllable phase change temperature of the NiTiNO intermediate layer bearing to generate radial adaptive restoring force after cooling, which can compensate for ±0.15mm shaft diameter deviation, breaking through the stringent requirements of traditional installation.

[0014] 3. This utility model utilizes the high wear resistance of the nitrided steel inner bearing and the stress dispersion of the multi-layer structure to effectively reduce fretting wear and eliminate the problems of bearing annealing deformation and early failure caused by overall heating.

[0015] 4. This utility model, by setting a multi-layer composite inner ring bearing on the inner side of the bearing inner ring main bearing, can not only replace the bearing inner ring main bearing to complete the fixation with the shaft and improve the installation speed, but also compensate for the size of the bearing inner ring main bearing with a larger size, so that it can be fixed on the shaft with a smaller size, which greatly improves the practicality of the bearing inner ring main bearing. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the multi-layer composite inner ring of this utility model; Figure 2 This is a side view of the multi-layer composite inner ring of this utility model; Figure 3 This is a schematic diagram of the main structure of the bearing inner ring of this utility model.

[0017] Figure label: 1. Bearing inner ring body; 11. Positioning boss; 2. Multi-layer composite inner ring; 21. High thermal conductivity metal layer; 22. Shape memory alloy layer; 23. Wear-resistant alloy layer; 24. Tapered chamfer; 25. Anti-slip texture; 26. Annular groove. Detailed Implementation

[0018] 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.

[0019] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0020] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing a bearing ring that can be quickly installed.

[0021] Combination Figure 1-3 As shown, this utility model provides a bearing ring that can be quickly installed, including a bearing inner ring body 1. A multi-layer composite inner ring 2 is coaxially nested inside the bearing inner ring body 1. The multi-layer composite inner ring 2 is composed of an outer high thermal conductivity metal layer 21, a middle shape memory alloy layer 22, and an inner wear-resistant alloy layer 23. The multi-layer composite inner ring 2 is connected to the bearing inner ring body 1 by an interference fit, and the axial length of the multi-layer composite inner ring 2 is less than half of that of the bearing inner ring body 1.

[0022] Specifically, the high thermal conductivity metal layer 21 is a copper alloy layer with a thickness accounting for 20%-30% of the total thickness of the multilayer composite inner ring 2; the shape memory alloy layer 22 is a nickel-titanium alloy layer with a thickness accounting for 40%-50% of the total thickness of the multilayer composite inner ring 2; and the wear-resistant alloy layer 23 is a nitrided steel layer with a thickness accounting for 20%-30% of the total thickness of the multilayer composite inner ring 2. The above configuration can optimize the balance between heat conduction and deformation. The copper layer conducts heat quickly to the shape memory alloy layer, and the thickness ratio ensures that the phase change expansion is ≥0.3mm. The phase change temperature of the shape memory alloy layer 22 is 60℃-80℃, which enables low-temperature rapid installation. This temperature is lower than the 120℃ tempering temperature of bearing steel, thus avoiding material performance degradation.

[0023] Furthermore, the high thermal conductivity metal layer 21 and the shape memory alloy layer 22 are fixed by explosive welding and diffusion annealing, and the shape memory alloy layer 22 and the wear-resistant alloy layer 23 are fixed by hot isostatic diffusion welding.

[0024] It should be noted that the high thermal conductivity of the copper alloy outer layer increases heat transfer efficiency by more than three times, significantly reducing the heating time of the bearing ring and solving the problems of high overall heating energy consumption and slow speed. By utilizing the superelasticity and controllable phase transformation temperature of the nickel-titanium intermediate layer, a radial adaptive restoring force is generated after cooling, which can compensate for ±0.15mm shaft diameter deviation, breaking through the stringent requirements of traditional installation. The high wear resistance of the nitrided steel inner layer, combined with the multi-layer structure to disperse stress, effectively reduces fretting wear and eliminates the bearing annealing deformation and early failure problems caused by overall heating. Furthermore, the two ends of the multi-layer composite inner ring 2 are provided with tapered guide angles 24, which can facilitate the insertion of the shaft and make installation convenient.

[0025] Furthermore, the inner surface of the wear-resistant alloy layer 23 is provided with anti-slip texture 25, which can further improve the stability of installation.

[0026] Furthermore, the mating surfaces of the bearing inner ring body 1 and the multi-layer composite inner ring 2 are provided with axially arranged positioning bosses 11, and the multi-layer composite inner ring 2 is provided with matching annular grooves 26 at corresponding positions, which can resist eccentric installation failure and improve accuracy and stability.

[0027] The terms "fixed," "installed," "connected," "set up," "open," "equipped with," "embedded," and "assembled" used in this manual to describe the position or relationship of components all refer to conventional physical connections or spatial configurations that can be understood and implemented by those skilled in the art based on the function of the relevant components, the context, and common knowledge. These relationships encompass, but are not limited to, specific forms such as welding, bonding, threaded fastening, snap-fit, interference fit, plug-in, sliding fit, hinge, integral molding, adjacent arrangement, and opening or slot accommodating. Their purpose is to clearly describe the relative positions, mating methods, and functional implementation paths between components, rather than limiting a single specific structural detail. To ensure a smooth and concise reading experience and ease of understanding, no separate explanation is provided after each term.

[0028] 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. A quick-installable bearing ring, comprising a bearing inner ring body (1), characterized in that, The inner ring body (1) of the bearing has a multi-layer composite inner ring (2) coaxially nested on the inner side. The multi-layer composite inner ring (2) is composed of a high thermal conductivity metal layer (21) on the outer layer, a memory alloy layer (22) in the middle layer and a wear-resistant alloy layer (23) on the inner layer. The multi-layer composite inner ring (2) is connected to the bearing inner ring body (1) by an interference fit.

2. The bearing ring that can be quickly installed according to claim 1, characterized in that, The high thermal conductivity metal layer (21) is a copper alloy layer, and its thickness accounts for 20%-30% of the total thickness of the multilayer composite inner ring (2).

3. The bearing ring that can be quickly installed according to claim 1, characterized in that, The memory alloy layer (22) is a nickel-titanium alloy layer, and its thickness accounts for 40%-50% of the total thickness of the multilayer composite inner ring (2).

4. The bearing ring that can be quickly installed according to claim 1, characterized in that, The wear-resistant alloy layer (23) is made of nitrided steel and its thickness accounts for 20%-30% of the total thickness of the multi-layer composite inner ring (2).

5. A bearing ring that can be quickly installed according to claim 1, characterized in that, The multi-layer composite inner ring (2) has tapered chamfers (24) at both ends.

6. A bearing ring that can be quickly installed according to claim 1, characterized in that, The inner surface of the wear-resistant alloy layer (23) is provided with anti-slip texture (25).

7. A bearing ring that can be quickly installed according to claim 1, characterized in that, The mating surfaces of the bearing inner ring body (1) and the multi-layer composite inner ring (2) are provided with axially arranged positioning bosses (11), and the multi-layer composite inner ring (2) is provided with matching annular grooves (26) at corresponding positions.

Images