Replaceable raceway tapered roller bearing

Abstract

This invention discloses a replaceable raceway tapered roller bearing, comprising an inner ring, an outer ring, a cage, and a plurality of rolling elements. The outer ring is fitted onto the inner ring, and the plurality of rolling elements are disposed between the inner and outer rings. The cage is fitted onto the plurality of rolling elements. An inner ring is coaxially and detachably fitted onto the inner ring, and an outer ring is coaxially and detachably connected to the outer ring. An inner raceway groove is formed on the outer side wall of the inner ring, and an outer raceway groove is formed on the inner side wall of the outer ring. The inner and outer raceway grooves combine to form a raceway space for the plurality of rolling elements to roll within it. This invention allows for the individual disassembly and replacement of the raceway, avoiding the waste of resources and increased maintenance costs caused by replacing the entire bearing after raceway wear. Furthermore, it eliminates the need for forcibly disassembling the mating surfaces of the inner and outer rings with the shaft and bearing housing, preventing damage to the shaft and bearing housing, and significantly improving equipment maintenance efficiency and operational stability.

Description

Technical Field

[0001] This invention relates to the field of bearing technology, and more specifically to a tapered roller bearing with interchangeable raceways. Background Technology

[0002] Existing tapered roller bearings still have several shortcomings that affect user experience and economic efficiency during industrial equipment operation, and these problems are particularly prominent under long-term high-load conditions. Firstly, in practical applications, the inner and outer raceways of the bearing are prone to wear and fatigue spalling. This is mainly because tapered roller bearings must simultaneously bear radial and axial loads, and the contact area between the raceway and the rollers is under high-stress cycling for extended periods. If the heat treatment process of the raceway surface is not properly controlled, or if the lubricating grease fails at high temperatures, the wear rate of the raceway will be further accelerated. When obvious scratches or fatigue spalling appear on the raceway, the bearing's operating accuracy will decrease significantly, generating severe vibration and noise. At this point, even if the bearing cage, rollers, and other components are still intact, the entire bearing must be replaced, resulting in serious resource waste and increased maintenance costs. Secondly, during bearing replacement, the difficulty of separating the inner and outer rings from the shaft and bearing housing becomes a key problem that troubles maintenance personnel. To ensure precision during installation, an interference fit is typically used. However, after prolonged operation, the metal contact surfaces may stick together due to oxidation, corrosion, or solidified oil. In such cases, significant external force must be applied using tools such as hydraulic pullers, or the bearing inner ring may be expanded by flame heating before disassembly. Improper operation, such as excessive heating, can alter the shaft's metallographic structure, leading to a decrease in its mechanical properties. Conversely, hammering disassembly can easily cause dents or deformation on the mating surfaces of the shaft or bearing housing, affecting subsequent assembly precision and even triggering secondary equipment malfunctions. This severely restricts equipment maintenance efficiency and long-term operational stability. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a tapered roller bearing with interchangeable raceways. It has a simple structure, allows for easy disassembly and replacement of the raceways, and offers excellent performance.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a tapered roller bearing with interchangeable raceways, comprising an inner ring, an outer ring, a cage, and a plurality of rolling elements. The outer ring is fitted onto the inner ring, and the plurality of rolling elements are disposed between the inner ring and the outer ring. The cage is fitted onto the plurality of rolling elements. An inner ring is coaxially and detachably fitted onto the inner ring, and an outer ring is coaxially and detachably connected onto the outer ring. An inner raceway groove is formed on the outer side wall of the inner ring, and an outer raceway groove is formed on the inner side wall of the outer ring. The inner raceway groove and the outer raceway groove together form a raceway space in which the plurality of rolling elements roll.

[0005] As a further improvement of the present invention, an internal thread is provided on the outer side wall of the inner ring, an external thread is provided on the inner side wall of the outer ring, and a thread adapted to the internal thread is provided on the inner side wall of the inner sleeve, so that the inner sleeve can be detachably fitted onto the inner ring, and a thread adapted to the external thread is provided on the outer side wall of the outer sleeve, so that the outer sleeve can be detachably installed inside the outer ring.

[0006] As a further improvement of the present invention, one end face of the outer ring is provided with an abutting edge extending toward the center of the outer ring. When the outer ring is installed inside the outer ring, the end of the outer ring abuts against the abutting edge. One end face of the inner ring is provided with a limiting edge extending away from the center of the inner ring. When the inner ring is installed on the inner ring, the end of the inner ring abuts against the limiting edge.

[0007] As a further improvement of the present invention, a first outer receiving ring groove is provided on the inner sidewall of the outer ring near the contact edge, and a second outer receiving ring groove is provided on the outer sidewall of the outer ring near the end face. The first and second outer receiving ring grooves are combined to form an outer receiving ring channel, which is filled with grease-retaining foam. A connecting hole is provided in the outer ring, which connects the outer receiving ring channel and the outer raceway groove. A first inner receiving ring groove is provided on the outer sidewall of the inner ring near the limiting edge, and a second inner receiving ring groove is provided on the inner sidewall of the inner ring near the end face. The first and second inner receiving ring grooves are combined to form an inner receiving ring channel, which is filled with grease-retaining foam. A connecting hole is provided in the inner ring, which connects the inner receiving ring channel and the inner raceway groove.

[0008] As a further improvement of the present invention, an annular rubber pad is provided between the contact edge and the end face of the outer ring, and between the limiting edge and the end face of the inner ring.

[0009] This invention, by setting the raceway on detachable inner and outer rings, allows the bearing to continue operating only by replacing the inner and outer rings when the raceway wears or fatigues, eliminating the need for complete scrapping. This effectively reduces resource waste and significantly lowers equipment maintenance costs. Furthermore, the replacement process avoids disassembling the interference fit surfaces between the inner ring and shaft, and the outer ring and bearing housing, preventing damage to the shaft and bearing housing caused by traditional disassembly methods and significantly improving equipment maintenance efficiency. The threaded connection ensures convenient assembly and disassembly of the inner and outer rings and provides connection stability. The contact edge and limiting edge achieve axial positioning of the inner and outer rings, ensuring the coaxiality of the raceway and the bearing's operational accuracy. The continuous lubrication structure formed by the grease reservoir and connecting holes reduces wear between the raceway and rolling elements, extending the raceway's service life. The annular rubber pad serves both sealing and cushioning functions, preventing impurities from entering and grease leakage, while also reducing vibration and noise during bearing operation. Attached Figure Description

[0010] Figure 1This is an overall structural diagram of the tapered roller bearing with interchangeable raceways according to the present invention. Figure 2 This is a schematic diagram of the internal structure of the tapered roller bearing with interchangeable raceways according to the present invention. Figure 3 for Figure 2 Enlarged view of section A; Figure 4 for Figure 2 Enlarged view of section B; Figure 5 This is a schematic diagram of the inner ring structure; Figure 6 This is a schematic diagram of the outer ring structure. Detailed Implementation

[0011] The present invention will now be described in further detail with reference to the embodiments shown in the accompanying drawings.

[0012] Reference Figure 1 , Figure 2 As shown, the replaceable raceway tapered roller bearing of this embodiment includes an inner ring 2, an outer ring 1, a cage 3, and a plurality of rolling elements 4. The outer ring 1 is fitted onto the inner ring 2, and the plurality of rolling elements 4 are disposed between the inner ring 2 and the outer ring 1. The cage 3 is fitted onto the plurality of rolling elements 4. The inner ring 2 is coaxially and detachably fitted with an inner ring 5, and the outer ring 1 is coaxially and detachably connected with an outer ring 6. The outer side wall of the inner ring 5 has an inner raceway groove 51, and the inner side wall of the outer ring 6 has an outer raceway groove 61. The inner raceway groove 51 and the outer raceway groove 61 are combined to form a raceway space in which the plurality of rolling elements 4 roll. When the bearing is operating normally, the rolling element 4 rolls within the raceway space formed by the inner raceway groove 51 and the outer raceway groove 61, bearing radial and axial loads. When wear or fatigue spalling occurs in the inner raceway groove 51 or the outer raceway groove 61, causing a decrease in bearing precision, simply remove the inner ring 5 from the inner ring 2 and the outer ring 6 from the outer ring 1, and replace them with new inner ring 5 and outer ring 6 to restore bearing performance. This eliminates the need to replace the entire bearing, avoiding resource waste and increased maintenance costs. At the same time, it eliminates the need to disassemble the interference fit surfaces between the inner ring 2 and the shaft, and between the outer ring 1 and the bearing housing, completely solving the problem of easy damage to the shaft and bearing housing by traditional disassembly methods, and significantly improving maintenance efficiency.

[0013] Reference Figure 2As shown, the inner ring 2 has an internal thread on its outer side wall, the outer ring 1 has an external thread on its inner side wall, and the inner sleeve 5 has a thread that matches the internal thread, allowing the inner sleeve 5 to be detachably fitted onto the inner ring 2. The outer sleeve 6 has a thread that matches the external thread on its outer side wall, allowing the outer sleeve 6 to be detachably installed inside the outer ring 1. During installation, the inner sleeve 5 is screwed into the inner ring 2 along the thread, and the outer sleeve 6 is screwed into the outer ring 1 along the thread to complete the assembly. Disassembly is simple and convenient; the inner and outer sleeves are removed by rotating in the opposite direction. The threaded connection not only ensures ease of assembly and disassembly but also provides stable circumferential and axial fixing forces, preventing the inner and outer sleeves from shifting during bearing operation, ensuring the positional accuracy of the raceway, and further improving the bearing's operational stability.

[0014] Reference Figure 2 , Figure 3 , Figure 4 As shown, further, one end face of the outer ring 1 is provided with an abutting edge 11 extending towards the center of the outer ring 1. When the outer ring 6 is installed inside the outer ring 1, the end of the outer ring 6 abuts against the abutting edge 11. One end face of the inner ring 2 is provided with a limiting edge 21 extending away from the center of the inner ring 2. When the inner ring 5 is installed on the inner ring 2, the end of the inner ring 2 abuts against the limiting edge 21. The abutting edge 11 and the limiting edge 21 respectively axially limit the outer ring 6 and the inner ring 5, ensuring that the inner and outer rings are installed in place, so that the relative positions of the inner raceway groove 51 and the outer raceway groove 61 are accurately matched, ensuring that the rolling element 4 can roll smoothly. This structure does not require additional positioning components, simplifies the bearing structure, and can withstand a certain axial load, thus helping to improve the bearing capacity.

[0015] Reference Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6As shown, further, the inner wall of the outer ring 1 is provided with a first outer receiving ring groove 12 near the contact edge 11, and the outer wall of the outer ring 6 is provided with a second outer receiving ring groove 62 near the end face. The first outer receiving ring groove 12 and the second outer receiving ring groove 62 are combined to form an outer receiving ring channel, which is filled with grease-retaining foam. The outer ring 6 has a connecting hole 8, which connects the outer receiving ring channel and the outer raceway groove 61. The outer wall of the inner ring 2 is provided with a first inner receiving ring groove 22 near the limiting edge 21, and the inner wall of the inner ring 5 is provided with a second inner receiving ring groove 52 near the end face. The first inner receiving ring groove 22 and the second inner receiving ring groove 52 are combined to form an inner receiving ring channel, which is filled with grease-retaining foam. The inner ring 5 has a connecting hole 8, which connects the inner receiving ring channel and the inner raceway groove 51. The lubricating grease absorbed and stored in the grease reservoir flows slowly and continuously into the inner raceway groove 51 and the outer raceway groove 61 through the connecting hole 8 during bearing operation, lubricating the rolling element 4 and the raceway contact surface, effectively reducing friction and wear, and extending the service life of the raceway.

[0016] Reference Figure 2 , Figure 3 , Figure 4 As shown, furthermore, annular rubber pads 7 are provided between the end face of the contact edge 11 and the outer ring 6, and between the end face of the limiting edge 21 and the inner ring 5. The annular rubber pads 7 fill the assembly gaps between the contact edge 11 and the outer ring 6, and between the limiting edge 21 and the inner ring 5, forming a sealing structure that can effectively prevent external dust, moisture and other impurities from entering the raceway space, while preventing internal lubricating grease leakage; in addition, the elastic properties of the rubber pads can absorb the vibration and impact generated during bearing operation, reduce operating noise, and compensate for minor installation errors of the inner and outer rings, further improving the operating stability of the bearing.

[0017] In summary, the present invention employs a core solution where an inner ring 5 is coaxially and detachably connected to the inner ring 2 of the bearing, and an outer ring 6 is coaxially and detachably connected to the outer ring 1. Inner raceway grooves 51 and outer raceway grooves 61 are respectively formed on the inner and outer rings to create the raceway space. This solution solves the problems of existing tapered roller bearings requiring complete replacement after raceway wear, leading to resource waste, high maintenance costs, and easy damage to the shaft and bearing housing during disassembly. It enables individual replacement of the raceway, reducing maintenance costs and improving repair efficiency. Furthermore, through improved structures such as threaded connections, axial positioning, continuous lubrication, and sealing buffers, the connection stability, operational accuracy, service life, and operational stability of the bearing are further enhanced.

[0018] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A tapered roller bearing with interchangeable raceways, comprising an inner ring (2), an outer ring (1), a cage (3), and a plurality of rolling elements (4), wherein the outer ring (1) is fitted onto the inner ring (2), the plurality of rolling elements (4) are disposed between the inner ring (2) and the outer ring (1), and the cage (3) is fitted onto the plurality of rolling elements (4), characterized in that: The inner ring (2) is coaxially and detachably sleeved with an inner sleeve ring (5), and the outer ring (1) is coaxially and detachably connected with an outer sleeve ring (6). The outer side wall of the inner sleeve ring (5) is provided with an inner raceway groove (51), and the inner side wall of the outer sleeve ring (6) is provided with an outer raceway groove (61). The inner raceway groove (51) and the outer raceway groove (61) together form a raceway space for several rolling bodies (4) to roll in it.

2. The tapered roller bearing with interchangeable raceways according to claim 1, characterized in that: The inner ring (2) has an internal thread on its outer side wall, the outer ring (1) has an external thread on its inner side wall, the inner sleeve (5) has a thread that matches the internal thread on its inner side wall, so that the inner sleeve (5) can be detachably fitted onto the inner ring (2), and the outer sleeve (6) has a thread that matches the external thread on its outer side wall, so that the outer sleeve (6) can be detachably installed inside the outer ring (1).

3. The tapered roller bearing with interchangeable raceways according to claim 2, characterized in that: One end face of the outer ring (1) is provided with an abutting edge (11) extending toward the center of the outer ring (1). When the outer ring (6) is installed inside the outer ring (1), the end of the outer ring (6) abuts against the abutting edge (11). One end face of the inner ring (2) is provided with a limiting edge (21) extending away from the center of the inner ring (2). When the inner ring (5) is installed on the inner ring (2), the end of the inner ring (2) abuts against the limiting edge (21).

4. The tapered roller bearing with interchangeable raceways according to claim 3, characterized in that: The inner wall of the outer ring (1) is provided with a first outer receiving ring groove (12) near the contact edge (11), and the outer wall of the outer ring (6) is provided with a second outer receiving ring groove (62) near the end face. The first outer receiving ring groove (12) and the second outer receiving ring groove (62) are combined to form an outer receiving ring channel, which is filled with grease-retaining foam. The outer ring (6) is provided with a connecting hole (8), which connects the outer receiving ring channel and the outer roller groove (61). The inner ring (2) has a first content receiving ring groove (22) on the outer side wall near the limiting edge (21), and the inner sleeve (5) has a second content receiving ring groove (52) on the inner side wall near the end face. The first content receiving ring groove (22) and the second content receiving ring groove (52) are combined to form a content receiving ring channel, which is filled with grease storage foam. The inner sleeve (5) has a connecting hole (8) that connects the content receiving ring channel and the inner roller groove (51).

5. The tapered roller bearing with interchangeable raceways according to claim 4, characterized in that: An annular rubber pad (7) is provided between the contact edge (11) and the end face of the outer ring (6) and between the limiting edge (21) and the end face of the inner ring (5).

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