A double-row tapered roller bearing

Abstract

This invention discloses a double-row tapered roller bearing, relating to the field of bearing technology. It includes a bearing outer ring and further comprises: a pair of guide rings symmetrically disposed at both ends of the bearing outer ring; a tapered rotor disposed on the inner ring position of each guide ring; and a guide plate that mates with the tapered rotor on the inner wall of each guide ring. This invention, by symmetrically arranging guide rings at both ends of the bearing outer ring and providing guide plates on the inner walls of the guide rings that mate with the inclined surfaces of the tapered rotor, combined with a first guide groove on a limiting frame, achieves precise positioning and stable transmission of the tapered rotor, effectively solving the problem of axial movement of the rolling elements in existing bearings.

Description

Technical Field

[0001] This invention relates to the field of bearing technology, specifically to a double-row tapered roller bearing. Background Technology

[0002] Double-row tapered roller bearings are a common type of rolling bearing, widely used in rotating support components such as automotive wheel hubs, construction machinery, and machine tool spindles that need to withstand large combined radial and axial loads. These bearings typically consist of an outer ring, a tapered rotor, and a retaining structure. Stable rolling transmission is achieved through the mating of the tapered surfaces of the rollers with the guiding surfaces of the inner and outer rings. In existing double-row tapered roller bearing designs, the fit between the guide ring, retaining frame, and rotor is relatively fixed, usually employing a rigid retaining structure. Normal bearing operation relies on manufacturing precision and assembly clearances. However, existing designs are primarily geared towards constant load conditions and lack the ability to adaptively adjust to load variations.

[0003] The shortcomings of existing technologies are that when the load on the bearing changes, especially when the load suddenly increases, the existing rigid limiting structure is difficult to dynamically adapt, which can easily lead to stress concentration between the rotor and the guide surface, thus affecting the smoothness of bearing operation and service life. In addition, the existing structure lacks an effective compensation mechanism for temperature-induced deformation and cannot automatically optimize the support state under temperature rise conditions. Summary of the Invention

[0004] Therefore, the purpose of this invention is to provide a double-row tapered roller bearing to solve the technical problem that existing double-row tapered roller bearings cannot adaptively adjust the support stiffness under variable load and temperature conditions, resulting in unstable operation.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a double-row tapered roller bearing, comprising an outer ring, and further comprising: a pair of guide rings symmetrically disposed at both ends of the outer ring; a tapered rotor disposed on the inner ring of each guide ring; a guide plate having an inclined surface on the inner wall of each guide ring and cooperating with the tapered rotor; a floating support frame disposed at the center of the inner ring of the outer ring; a pair of connecting plates symmetrically disposed on both sides of the floating support frame; a guide groove cooperating with the connecting plates; a limiting frame axially sliding through the guide groove, wherein the limiting frame has a guide groove on its side near the tapered rotor, the guide groove cooperating with the guide plate to limit the tapered rotor and enable it to rotate; and a slider disposed on the tapered rotor, wherein the limiting frame has a corresponding guide groove for the slider to cooperate with.

[0006] The present invention is further configured such that the floating support frame is provided with a plurality of partitions, the plurality of partitions forming a plurality of spaces, and guide rods and phase change material airbags are provided at intervals in the spaces.

[0007] The present invention is further configured such that the connecting plate and the guide groove are connected by the connecting plate.

[0008] The present invention is further configured such that the phase change material in the phase change material airbag increases in volume under the temperature generated by the rotation of the bearing, thereby generating a supporting force in the direction of movement of the conical rotor.

[0009] The present invention is further configured such that the limiting frame slides with the connecting plate through the guide groove, so that when the bearing load increases, the displacement generated by the conical rotor can adaptively adjust the support state.

[0010] The present invention is further configured such that the inclined surface of the guide plate and the guide groove together form a rolling guide path for the conical rotor.

[0011] The invention is further configured such that the slider slides in conjunction with the guide groove to maintain the motion stability of the conical rotor when it is displaced.

[0012] In summary, the present invention has the following main beneficial effects: This invention solves the problem of axial movement of rolling elements in existing bearings by symmetrically setting guide rings at both ends of the outer ring of the bearing and setting guide plates on the inner wall of the guide rings that cooperate with the inclined surface of the conical rotor. This, combined with the first guide groove on the limiting frame, achieves precise positioning and stable transmission of the conical rotor. Furthermore, by opening a second guide groove on the first connecting plate and setting a corresponding slider on the conical rotor, the conical rotor can be compressed and displaced when the load increases, causing the first connecting plate to slide adaptively. This automatically adjusts the support position to match load changes, overcoming the defects of traditional bearings with fixed stiffness and prone to local stress concentration under variable load conditions. Further, by setting guide rods and phase change material airbags at intervals within the floating support frame, the volume expansion of the phase change material when the bearing operating temperature rises pushes the guide rods and the first connecting plate in the direction of the conical rotor's displacement, achieving thermally induced support balance compensation. This solves the problem of increased clearance or decreased support stiffness in existing bearings due to thermal expansion under temperature rise conditions, significantly improving the bearing's operational stability, adaptive adjustment capability, and service life under complex conditions of variable load and temperature. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the internal structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the present invention; Figure 4 This is a schematic diagram of the floating support frame of the present invention; Figure 5 This is a side cross-sectional view of the guide ring of the present invention.

[0014] In the diagram: 1. Bearing outer ring; 2. Guide ring; 3. Limiting frame; 4. Conical rotor; 5. Guide groove; 6. Guide plate; 7. Connecting plate; 8. Floating support frame; 9. Connecting plate; 10. Partition plate; 11. Guide rod; 12. Phase change material airbag; 13. Guide groove; 14. Slider. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0016] The embodiments of the present invention will now be described.

[0017] A type of double-row tapered roller bearing, such as Figure 1 and Figure 2 As shown, it includes: bearing outer ring 1, guide ring 2, limit frame 3, conical rotor 4, first guide groove 5, guide plate 6, first connecting plate 7, floating support frame 8, second connecting plate 9, partition 10, guide rod 11, phase change material airbag 12, second guide groove 13 and slider 14.

[0018] As the basic structure of this invention, the bearing outer ring 1 is an integrally circular outer ring component. Unlike conventional bearings, a pair of guide rings 2 are symmetrically arranged at both ends of the bearing outer ring 1 along its axial direction. The guide rings 2 can be integrally formed with the bearing outer ring 1 or separately fixedly connected, and their inner ring surfaces are used to mount rolling elements. On the inner ring surface of each guide ring 2, a plurality of conical rotors 4 are evenly arranged circumferentially. These conical rotors 4 are equivalent to the rolling elements of the bearing, and their outer surfaces have a conical structure.

[0019] like Figure 3 As shown, a guide plate 6 is provided on the inner wall of the guide ring 2 to guide the rolling of the conical rotor 4. The guide plate 6 has an inclined surface that matches the inclined surface of the conical rotor 4, and the inclination direction of the inclined surface of the guide plate 6 is consistent with the direction of the conical surface of the conical rotor 4. When the conical rotor 4 rotates, its inclined surface rolls along the inclined surface of the guide plate 6, thereby realizing the basic transmission function of the bearing.

[0020] like Figure 4As shown, based on the aforementioned external structure, the present invention provides a floating support frame 8 at the inner center of the bearing outer ring 1. This floating support frame 8 is generally disc-shaped or spoke-shaped, and is coaxially arranged with the bearing outer ring 1 and the guide ring 2. A pair of first connecting plates 7 are symmetrically arranged on both sides of the floating support frame 8. The first connecting plates 7 are used to connect the floating support frame 8 to the limiting assembly of the conical rotor 4 located on the outer side.

[0021] Specifically, each first connecting plate 7 has a limiting frame 3 on one side near the plurality of conical rotors 4. The limiting frame 3 can be an integrally formed or fixedly connected bracket structure with the first connecting plate 7. A first guide groove 5 is formed on the limiting frame 3. The first guide groove 5 is preferably an inclined groove, the inclination angle of which matches the cone angle of the conical rotor 4. The first guide groove 5 cooperates with the guide plate 6: the guide plate 6 is partially accommodated in the first guide groove 5, and the two form a sliding or rolling guiding relationship. Through the cooperation of the first guide groove 5 and the guide plate 6, the limiting frame 3 can limit the conical rotor 4, prevent its axial movement, and at the same time allow the conical rotor 4 to make a certain degree of radial or axial displacement when under force, and ensure that the conical rotor 4 can rotate normally, realizing the transmission effect of ordinary bearings.

[0022] To further improve the support stability of the conical rotor 4 and achieve load self-adaptation, a second guide groove 13 is also provided on the first connecting plate 7. This second guide groove 13 extends axially or in a direction consistent with the displacement direction of the conical rotor 4. Correspondingly, a slider 14 is fixedly provided on each conical rotor 4, which is accommodated within the second guide groove 13 and can slide along it. Through the cooperation of the slider 14 and the second guide groove 13, a relatively slidable connection is formed between the conical rotor 4 and the first connecting plate 7.

[0023] During operation, when the load on the bearing increases, the conical rotor 4 is compressed, resulting in displacement towards the bearing center or along the second guide groove 13. At this time, the slider 14 slides within the second guide groove 13, while the first connecting plate 7 drives the limiting frame 3 to slide adaptively through the second guide groove 13, thereby changing the support position of the conical rotor 4. This adaptive adjustment mechanism enables the bearing to automatically adjust its support stiffness under heavy load conditions, avoiding local stress concentration.

[0024] like Figure 5 Another important innovation of this invention is the introduction of a thermally induced support balance compensation mechanism. Multiple partitions 10 are provided inside the floating support frame 8. Specifically, refer to... Figure 4The floating support frame 8 is internally divided into multiple independent cavities or spaces distributed circumferentially by a plurality of partitions 10. Within each space, guide rods 11 and phase change material airbags 12 are spaced apart. One end of the guide rod 11 is in contact with or fixedly connected to the first connecting plate 7 or the second connecting plate 9; the phase change material airbag 12 is filled with a phase change material, such as paraffin, fatty acids, or other phase change materials with a large volume expansion effect.

[0025] Furthermore, the first connecting plate 7 and the second guide groove 13 are connected by the second connecting plate 9, so that the first connecting plate 7 can slide axially or radially through the second guide groove 13.

[0026] When the bearing operates for an extended period, causing its internal temperature to rise, the phase change material within the phase change material bladder 12 absorbs heat and undergoes a phase change, such as changing from a solid to a liquid or from a liquid to a gas, resulting in a significant increase in its volume. This expansion of the phase change material bladder 12 pushes the surrounding guide rod 11 and / or directly pushes the first connecting plate 7 or the second connecting plate 9, causing them to move in the direction of displacement of the conical rotor 4, i.e., in the direction of increased load. This movement is exactly opposite to or complements the displacement direction of the conical rotor 4 when the load increases, thereby actively applying additional support force when the temperature rises, compensating for the decrease in clearance or stiffness caused by thermal expansion, and achieving dynamic adjustment of the bearing support balance.

[0027] Through the above structural design, the double-row tapered roller bearing provided by the present invention not only has the rotational support function of ordinary bearings, but also can achieve adaptive displacement adjustment through the cooperation of tapered rotor 4, slider 14 and second guide groove 13 when the load changes. Furthermore, when the temperature changes, it can utilize the phase change expansion characteristics of phase change material airbag 12 to thermally drive guide rod 11 and first connecting plate 7 to actively adjust the support state, which significantly improves the operating stability and service life of the bearing under variable load and temperature conditions.

[0028] As a further optimization of this embodiment, the internal structure of the floating support frame 8 is specifically defined. In this embodiment, the interior of the floating support frame 8 is divided into multiple cavities evenly distributed circumferentially by multiple partitions 10. Each cavity contains an alternating arrangement of a guide rod 11 and a phase change material airbag 12. That is, the guide rod 11 and the phase change material airbag 12 are arranged alternately in the circumferential direction. This arrangement allows the thermal expansion force to be evenly distributed circumferentially, avoiding uneven loading and further improving the uniformity of support balance compensation.

[0029] As a further limitation of the limiting structure, the first guide groove 5 on the limiting frame 3 in this embodiment is an inclined groove, and its inclination angle is set to be exactly equal to the cone angle of the conical rotor 4, for example, both being between 15° and 25°. Simultaneously, the guide plate 6 has an inclined surface that contacts the conical rotor 4, and the inclination direction of this inclined surface is consistent with the cone surface direction of the conical rotor 4. The advantage of this structure is that during the rolling process of the conical rotor 4, the cone surface of the conical rotor 4 can simultaneously form line contact or surface contact with the inclined surface of the guide plate 6 and the groove wall of the first guide groove 5, thereby improving the positioning accuracy and load-bearing capacity of the rolling elements while ensuring rotational flexibility.

[0030] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A double-row tapered roller bearing, comprising an outer bearing ring (1), characterized in that, Also includes: A pair of guide rings (2) are symmetrically arranged at both ends of the outer ring (1) of the bearing; Multiple conical rotors (4) are arranged circumferentially on the inner ring surface of the guide ring (2); A guide plate (6) is disposed on the inner wall of the guide ring (2) and cooperates with the inclined surface of the conical rotor (4); A floating support frame (8) is located at the center of the outer ring (1) of the bearing; a pair of first connecting plates (7) are symmetrically arranged on both sides of the floating support frame (8); A partition (10) is provided inside the floating support frame (8) to divide the interior of the floating support frame (8) into multiple spaces; The guide rod (11) and the phase change material airbag (12) are spaced apart within the space formed by the partition (10); the second connecting plate (9) connects the first connecting plate (7) and the second guide groove (13).

2. The double-row tapered roller bearing according to claim 1, characterized in that, The first connecting plate (7) is provided with a second guide groove (13), and the conical rotor (4) is provided with a corresponding slider (14), which can slide in the second guide groove (13).

3. The double-row tapered roller bearing according to claim 1, characterized in that, When the load on the bearing increases, the conical rotor (4) is squeezed and displaced, and the first connecting plate (7) slides adaptively through the second guide groove (13) to change the support position.

4. The double-row tapered roller bearing according to claim 1, characterized in that, The phase change material in the phase change material airbag (12) expands in volume when the bearing operating temperature rises, pushing the guide rod (11) and / or the first connecting plate (7) to move in the displacement direction of the conical rotor (4) to achieve thermally induced support balance compensation.

5. The double-row tapered roller bearing according to claim 1, characterized in that, The floating support frame (8) is divided into multiple cavities distributed circumferentially by multiple partitions (10), and the guide rod (11) and the phase change material airbag (12) are alternately arranged in each cavity.

6. The double-row tapered roller bearing according to claim 1, characterized in that, The first guide groove (5) on the limiting frame (3) is an inclined groove, and its inclination angle matches the cone angle of the conical rotor (4).

7. The double-row tapered roller bearing according to claim 1, characterized in that, The guide plate (6) has an inclined surface that contacts the conical rotor (4), and the inclination direction of the inclined surface is consistent with the conical surface direction of the conical rotor (4).

8. The double-row tapered roller bearing according to claim 1, characterized in that, The bearing outer ring (1), guide ring (2) and floating support frame (8) are coaxially arranged.

9. The double-row tapered roller bearing according to claim 1, characterized in that, The first connecting plate (7) can slide axially through the second guide groove (13); The first connecting plate (7) is provided with a limiting frame (3) on the side near the conical rotor (4). The limiting frame (3) is provided with a first guide groove (5). The first guide groove (5) cooperates with the guide plate (6) to limit the conical rotor (4) so ​​that the conical rotor (4) can rotate.

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