A housing structure for an integrated tapered bearing outer ring

Abstract

This utility model discloses a housing structure for an integrated tapered bearing outer ring, relating to the field of mechanical transmission technology. It includes a first housing and a second housing, which are detachably connected. A rotating shaft is provided between the first and second housings, and two bearing inner rings are symmetrically fitted onto the shaft. Each bearing inner ring has a first raceway. An outer bearing ring is located within both the first and second housings, with a second raceway on the side of each outer bearing ring that is close to the other. A retaining edge is provided within each outer bearing ring. This device directly forms the bearing outer ring through precision machining on the materials of the first and second housings. The integrated structure eliminates the mating interface between the outer ring and the housing bore, avoiding the impact of fretting wear and mating deformation on bearing performance. This helps improve system accuracy and lifespan. For direct machining, the entire bearing support area uses a consistent material, resulting in more uniform thermal expansion and reducing preload variations caused by differences in thermal expansion coefficients.

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission technology, specifically to a housing structure for an integrated tapered bearing outer ring. Background Technology

[0002] A tapered roller bearing consists of a separate inner ring, outer ring, rolling elements, and cage. The outer ring is a separate ring-shaped part, typically made of high-carbon chromium bearing steel, with precise tapered raceways and large flanges. During assembly, the outer ring is pressed or gently tapped into a specially machined bearing bore in the transmission housing (such as a gearbox housing or reducer housing). The housing needs to be machined with precision bores that match the outer diameter of the bearing outer ring and is usually designed with steps or retaining ring grooves for axial positioning.

[0003] For example, Chinese patent CN214331191U, entitled "A Tapered Roller Bearing with a Positioning Groove on the Outer Ring End Face," includes an inner ring, an outer ring, a cage, and rolling elements. A keyway is provided at a position corresponding to the outer diameter of the outer ring's end face. After the bearing is assembled with the housing, the bearing rings and mating surfaces are circumferentially positioned through the keyway, thereby achieving accurate installation and positioning of the bearing, facilitating installation and disassembly, and meeting the manufacturer's installation and usage requirements. This utility model features a simple structure, accurate positioning, and convenient and quick installation and disassembly, and is mainly used in tapered roller bearings for axle manufacturers and front and rear axles of engineering vehicles.

[0004] While the tapered roller bearing with a positioning groove on the outer ring end face described in the aforementioned patent is practical and convenient, it also has some shortcomings. The outer ring and the housing bore are an interference fit contact interface. When subjected to heavy loads or temperature changes, this mating surface may be subject to fretting wear or deformation, affecting bearing performance and lifespan. Furthermore, the thermal expansion coefficients of the outer ring and the housing may be different. Under conditions of large temperature changes, excessive or insufficient interference may cause deformation of the outer ring raceway, affecting bearing clearance and running accuracy. Utility Model Content

[0005] The purpose of this invention is to provide a housing structure for an integrated tapered bearing outer ring to address the shortcomings of the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: the housing structure of the integrated tapered bearing outer ring includes a first housing and a second housing, the first housing and the second housing are detachably connected, a rotating shaft is provided between the first housing and the second housing, two bearing inner rings are symmetrically fitted on the rotating shaft, and a first raceway is provided on both bearing inner rings, a bearing outer ring is provided inside the first housing and the second housing, a second raceway is provided on the side of the two bearing outer rings that are close to each other, and a retaining edge is provided inside the two bearing outer rings.

[0007] Furthermore, both bearing outer rings have multiple reinforcing ribs arranged in a circumferential array on their outer surfaces.

[0008] Furthermore, each of the first and second housings is provided with a connecting block, and the two connecting blocks are fixedly connected to the outer rings of the two bearings in a one-to-one correspondence. Each of the two connecting blocks has a lubricating oil passage that penetrates the corresponding outer ring of the bearing radially.

[0009] Furthermore, two mounting grooves are symmetrically provided on the rotating shaft, and the inner rings of the two bearings are respectively fitted into the two mounting grooves one by one.

[0010] Furthermore, a first retaining ring is fixedly sleeved on the rotating shaft, and a gear is sleeved on the rotating shaft. The gear is located between the inner rings of the two bearings, and a second retaining ring is fixedly connected to the end of the gear away from the first retaining ring.

[0011] Furthermore, the first housing has a plurality of mounting holes arranged in a circumferential array, and a bolt is interactively connected in each mounting hole. The second housing has a plurality of threaded holes arranged in a circumferential array, and each bolt is threadedly connected to each threaded hole in a one-to-one correspondence.

[0012] Furthermore, rolling elements are provided between the two first raceways and the corresponding second raceways, and wear-resistant layers are provided on both the two first raceways and the two second raceways, each of which is an electroplated layer.

[0013] Compared with the prior art, the beneficial effects provided by this utility model are as follows: The outer ring of the integrated tapered bearing is formed directly on the first and second housing materials through precision machining. At the same time, a wear-resistant layer is set in the first and second raceways to improve wear resistance and raceway surface hardness. The integrated structure eliminates the mating interface between the outer ring and the housing bore, avoiding the impact of fretting wear and mating deformation on bearing performance. The overall rigidity is better, the load transmission is more direct, and it helps to improve system accuracy and life. For the direct machining type, the material of the entire bearing support area is consistent, the thermal expansion is more uniform, and the problem of preload variation caused by the difference in thermal expansion coefficient is reduced. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0016] Figure 2 for Figure 1Sectional view at point AA;

[0017] Figure 3 A schematic diagram of the structure of the first housing provided in an embodiment of this utility model;

[0018] Figure 4 A schematic diagram of the structure of the second housing provided in an embodiment of this utility model;

[0019] Figure 5 A partial structural schematic diagram provided for an embodiment of this utility model;

[0020] Figure 6 This is a schematic diagram of the structure of the rotating shaft provided in an embodiment of the present utility model;

[0021] Figure 7 This is a schematic diagram of the bearing inner ring provided in an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached drawings: 1. First housing; 2. Second housing; 3. Bolt; 4. Shaft; 5. Gear; 6. Rolling element; 7. Inner ring of bearing; 8. Flange; 9. Lubricating oil passage; 10. Reinforcing rib; 11. Outer ring of bearing; 12. First retaining ring; 13. Mounting groove; 14. First raceway; 15. Connecting block; 16. Second raceway; 17. Second retaining ring. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0024] Please see Figure 1-7 The present invention provides a technical solution: the housing structure of the integrated tapered bearing outer ring 11 includes a first housing 1 and a second housing 2, the first housing 1 and the second housing 2 are detachably connected, a rotating shaft 4 is provided between the first housing 1 and the second housing 2, two bearing inner rings 7 are symmetrically fitted on the rotating shaft 4, and a first raceway 14 is provided on both bearing inner rings 7, a bearing outer ring 11 is provided in both the first housing 1 and the second housing 2, a second raceway 16 is provided on the side of the two bearing outer rings 11 that are close to each other, and a retaining edge 8 is provided in both bearing outer rings 11. Specifically, the bearing outer ring 11 is formed directly on the material of the first housing 1 and the second housing 2 by precision machining, eliminating the need for a separate bearing outer ring 11 part, simplifying the bill of materials, eliminating the need for press-fitting the outer ring, shortening the assembly process, improving efficiency, reducing assembly costs and error risks, eliminating the thickness of the independent bearing outer ring 11 itself and the axial space required for press-fitting, significantly reducing the axial dimension of the transmission device at the bearing mounting location, which is conducive to achieving a more compact overall design.

[0025] In this embodiment, the outer surfaces of both bearing outer rings 11 are provided with multiple reinforcing ribs 10 in a circumferential array. Specifically, this greatly enhances the bearing outer rings 11's ability to resist radial loads, impact loads, and deformation caused by forces generated during installation or disassembly. Increased rigidity means that under heavy loads or impact loads, the bearing outer rings 11 can better maintain their circular shape, ensuring a more uniform distribution of contact stress between the rolling element 6 and the first raceway 14. This directly reduces stress concentration points, thereby extending the service life of the bearing.

[0026] In this embodiment, a connecting block 15 is provided in both the first housing 1 and the second housing 2, and the two connecting blocks 15 are fixedly connected to the two bearing outer rings 11 in a one-to-one correspondence. A lubricating oil channel 9 is radially opened in both connecting blocks 15, penetrating the corresponding bearing outer ring 11. Specifically, the lubricating oil channel 9 can directly deliver lubricating oil or grease to the contact area between the rolling element 6 and the first raceway 14 and the second raceway 16. This is the part where friction and heat generation are most concentrated. An effective oil film can better disperse contact stress and improve the bearing's ability to resist heavy loads and impact loads.

[0027] In this embodiment, two mounting grooves 13 are symmetrically provided on the rotating shaft 4. The inner rings 7 of the two bearings are respectively fitted into the two mounting grooves 13 one by one. A first retaining ring 12 is fixedly fitted on the rotating shaft 4. A gear 5 is fitted on the rotating shaft 4. The gear 5 is located between the two inner rings 7 of the bearings, and a second retaining ring 17 is fixedly connected to the end of the gear 5 away from the first retaining ring 12. Specifically, after installing the inner ring 7 of the bearing close to the first retaining ring 12, the gear 5 and another inner ring 7 of the bearing can be fitted onto the rotating shaft 4 in sequence. After installation, the first retaining ring 12 and the second retaining ring 17 are symmetrically arranged. When the gear 5 transmits torque, bears external axial load, or is subject to vibration, the first retaining ring 12 and the second retaining ring 17 can prevent the inner ring 7 of the bearing from moving in the axial direction, ensuring that the set values ​​of the bearing internal clearance and preload remain stable.

[0028] In this embodiment, the first housing 1 has multiple mounting holes arranged in a circumferential array, and each mounting hole is connected to a bolt 3. The second housing 2 has multiple threaded holes arranged in a circumferential array, and each bolt 3 is threadedly connected to each threaded hole in a one-to-one correspondence. Specifically, the first housing 1 and the second housing 2 can be installed together by bolts 3, which facilitates the disassembly and installation of the overall device.

[0029] In this embodiment, rolling elements 6 are provided between the two first raceways 14 and the corresponding second raceways 16, and wear-resistant layers are provided on the two first raceways 14 and the two second raceways 16. Each wear-resistant layer is an electroplated layer. Specifically, the wear-resistant layer improves the wear resistance and the surface hardness of the first raceways 14 and the second raceways 16.

[0030] Working principle: The outer ring 11 of the integrated tapered bearing is formed directly on the material of the first housing 1 and the second housing 2 through precision machining. At the same time, wear-resistant layers are set in the first raceway 14 and the second raceway 16 to improve wear resistance and raceway surface hardness. The integrated structure eliminates the mating interface between the outer ring and the housing bore, avoiding the impact of fretting wear and mating deformation on bearing performance. The overall rigidity is better, the load transmission is more direct, and it helps to improve the system accuracy and life. For the direct machining type, the material of the entire bearing support area is consistent, the thermal expansion is more uniform, and the problem of preload variation caused by the difference in thermal expansion coefficient is reduced. In addition, lubrication channels 9 are arranged in the first housing 1 and the second housing 2, and the rolling elements 6 are fully lubricated.

[0031] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A housing structure for an integrated tapered bearing outer ring (11), comprising a first housing (1) and a second housing (2), wherein the first housing (1) and the second housing (2) are detachably connected, and a rotating shaft (4) is provided between the first housing (1) and the second housing (2), wherein two bearing inner rings (7) are symmetrically fitted on the rotating shaft (4), and both bearing inner rings (7) are provided with a first raceway (14), characterized in that, Also includes: Both the first housing (1) and the second housing (2) are provided with a bearing outer ring (11), and a second raceway (16) is provided on the side of the two bearing outer rings (11) that are close to each other. Both bearing outer rings (11) are provided with a retaining edge (8).

2. The housing structure of the integrated tapered bearing outer ring (11) according to claim 1, characterized in that, Both bearing outer rings (11) have multiple reinforcing ribs (10) arranged in a circular array on their circumferential surfaces.

3. The housing structure of the integrated tapered bearing outer ring (11) according to claim 1, characterized in that, The first housing (1) and the second housing (2) are each provided with a connecting block (15), and the two connecting blocks (15) are fixedly connected to the two bearing outer rings (11) in a one-to-one correspondence. The two connecting blocks (15) are each radially provided with a lubricating oil passage (9) that penetrates the corresponding bearing outer ring (11).

4. The housing structure of the outer ring (11) of an integrated tapered bearing according to claim 1, characterized in that, Two mounting grooves (13) are symmetrically provided on the rotating shaft (4), and the two bearing inner rings (7) are respectively fitted into the two mounting grooves (13) one by one.

5. The housing structure of the integrated tapered bearing outer ring (11) according to claim 2, characterized in that, A first retaining ring (12) is fixedly sleeved on the rotating shaft (4), and a gear (5) is sleeved on the rotating shaft (4). The gear (5) is located between the inner rings (7) of the two bearings, and a second retaining ring (17) is fixedly connected to the end of the gear (5) away from the first retaining ring (12).

6. The housing structure of the outer ring (11) of an integrated tapered bearing according to claim 1, characterized in that, The first housing (1) has multiple mounting holes arranged in a circumferential array, and each mounting hole is connected to a bolt (3). The second housing (2) has multiple threaded holes arranged in a circumferential array, and each bolt (3) is threadedly connected to each threaded hole in a one-to-one correspondence.

7. The housing structure of the outer ring (11) of an integrated tapered bearing according to claim 1, characterized in that, Rolling elements (6) are provided between the two first raceways (14) and the corresponding second raceways (16), and wear-resistant layers are provided on the two first raceways (14) and the two second raceways (16), and each wear-resistant layer is an electroplated layer.

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