A hub bearing with multiple diameter balls

Abstract

The present application relates to the technical field of bearing, in particular to a wheel hub bearing with multiple-diameter balls. The wheel hub bearing comprises an inner ring assembly, an outer ring assembly and a rolling assembly. The inner ring assembly comprises a first flange part, a first raceway unit and a second raceway unit connected in sequence. The outer ring assembly comprises a third raceway unit, a second flange part and a fourth raceway unit connected in sequence. The rolling assembly comprises a first rolling unit and a second rolling unit. The first rolling unit is arranged between the first raceway unit and the third raceway unit. The second rolling unit is arranged between the second raceway unit and the fourth raceway unit. The diameter of the second rolling unit is smaller than that of the first rolling unit. The working state of the wheel hub bearing comprises that the first flange part and the second flange part are subjected to a force towards the central axis of the inner ring assembly. Thus, the problem of reduced supporting strength of the force-receiving side of the wheel hub bearing is solved.

Description

Technical Field

[0001] This invention relates to the field of bearing technology, and more specifically, to a hub bearing with multi-diameter balls. Background Technology

[0002] Bearings are important components used for rotating supports in mechanical bodies. With the development of bearings, many types have emerged, and wheel hub bearings are one of them. Wheel hub bearings integrate components such as oil seals and wheel hubs into a single unit based on a basic rotating support. This makes installation more convenient and provides better sealing and higher precision, making them one of the key components of automobiles.

[0003] During use, the wheel hub bearing is connected to the tire through a flange structure on one side. In the axial direction of the wheel hub bearing, there are two raceways inside the wheel hub bearing. Rolling units are set in both raceways. Among them, the rolling units in one raceway are closer to the tire and are subjected to more force.

[0004] However, in the existing technology, for the sake of design, processing and installation convenience, the diameter and volume of the rolling elements in the two raceways are the same, which reduces the support strength of the bearing on the load side and affects the performance of the product. Summary of the Invention

[0005] To address the problem of reduced support strength on the load-bearing side of wheel hub bearings, this invention provides a wheel hub bearing with multi-diameter balls, comprising:

[0006] The inner ring assembly includes a first flange portion, a first raceway unit, and a second raceway unit connected in sequence.

[0007] The outer ring assembly includes a third raceway unit, a second flange portion, and a fourth raceway unit connected in sequence, wherein the second flange portion is sleeved on the outer periphery of the first raceway unit and the second raceway unit;

[0008] A rolling assembly, comprising a first rolling unit and a second rolling unit; the first rolling unit is disposed abutting between a first raceway unit and a third raceway unit; the second rolling unit is disposed abutting between a second raceway unit and a fourth raceway unit; the diameter of the second rolling unit is smaller than the diameter of the first rolling unit.

[0009] The working state of the hub bearing includes: the first flange portion and the second flange portion are subjected to a force toward the central axis of the inner ring assembly.

[0010] Optionally, the first raceway unit includes a first body and a first raceway; one end of the first body is connected to the first flange, and the other end of the first body is connected to the second raceway unit; the first raceway is disposed on the outer circumferential surface of the first body; the third raceway unit includes a third body and a third raceway; one end of the third body is connected to the second flange, and the other end of the third body is sealed to the first body; the third raceway is disposed on the inner circumferential surface of the third body; the first rolling unit includes a first support bracket and a plurality of first rolling elements; the plurality of first rolling elements are disposed on the first support bracket, and the plurality of first rolling elements are arranged at circumferential intervals along the first support bracket, and the first rolling elements respectively abut against the first raceway and the third raceway.

[0011] Optionally, the second raceway unit includes a receiving portion and a filling portion; one end of the receiving portion is connected to the first raceway unit; the filling portion includes a filling body and a second raceway; the filling body is disposed on the receiving portion; the second raceway is disposed on the outer circumferential surface of the filling body; the fourth raceway unit includes a fourth body and a fourth raceway; one end of the fourth body is connected to the second flange portion, and the other end of the fourth body is sealed to the filling body; the fourth raceway is disposed on the inner circumferential surface of the fourth body; the second rolling unit includes a second support bracket and a plurality of second rolling elements; the plurality of second rolling elements are disposed on the second support bracket, and the plurality of second rolling elements are arranged at circumferential intervals along the second support bracket, and the second rolling elements respectively abut against the second raceway and the fourth raceway, and the diameter of the first rolling element is larger than the diameter of the second rolling element.

[0012] Optionally, the receiving part includes a receiving body and a receiving groove; one end of the receiving body is connected to the first raceway unit; the receiving groove is disposed on the outer peripheral surface of the receiving body; and the filling body is disposed in the receiving groove.

[0013] Optionally, the central angle corresponding to the first raceway is smaller than the central angle corresponding to the third raceway.

[0014] Optionally, the central angle corresponding to the third raceway is greater than 90°.

[0015] Optionally, the gap between the first raceway and the first rolling element is smaller than the gap between the third raceway and the first rolling element; the gap between the second raceway and the second rolling element is smaller than the gap between the fourth raceway and the second rolling element.

[0016] Optionally, the ratio of the radius of the first raceway to the radius of the first rolling element is between 1.04 and 1.06.

[0017] Optionally, the ratio of the radius of the third raceway to the radius of the first rolling element is between 1.02 and 1.04.

[0018] Optionally, L2≤L1: where the distance between the center of the first rolling element and the central axis of the inner ring assembly is L1, and the distance between the center of the second rolling element and the central axis of the inner ring assembly is L2.

[0019] To address the problem of reduced support strength on the load-bearing side of the wheel hub bearing, this invention offers the following advantages:

[0020] When a wheel hub bearing is in use, in the axial direction of the inner ring assembly, the first rolling unit is closer to the point of force on one side than the second rolling unit. Therefore, the force borne by the first rolling unit is greater than that borne by the second rolling unit. Thus, increasing the diameter and volume of the first rolling unit is beneficial to improving the working performance of the wheel hub bearing and extending its service life. Attached Figure Description

[0021] Figure 1 A schematic diagram of a hub bearing according to one embodiment is shown;

[0022] Figure 2 A schematic diagram of the inner ring assembly and outer ring assembly in a wheel hub bearing according to one embodiment is shown;

[0023] Figure 3 A partial schematic diagram of a hub bearing according to one embodiment is shown.

[0024] Figure label:

[0025] 10. Inner ring assembly; 11. Tooth end; 12. Second raceway unit; 121. Receiving part; 1211. Receiving body; 1212. Receiving groove; 122. Filling part; 1221. Filling body; 1222. Second raceway; 13. First raceway unit; 131. First body; 132. First raceway; 14. First flange part.

[0026] 20. Rolling assembly; 21. First rolling unit; 211. First support bracket; 212. First rolling element; 22. Second rolling unit; 221. Second support bracket; 222. Second rolling element.

[0027] 30. Outer ring assembly; 31. Third raceway unit; 311. Third body; 312. Third raceway; 32. Second flange; 33. Fourth raceway unit; 331. Fourth body; 332. Fourth raceway. Detailed Implementation

[0028] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.

[0029] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0030] Bearings are important components used for rotating supports in mechanical bodies. With the development of bearings, many types have emerged, and wheel hub bearings are one of them. Wheel hub bearings integrate components such as oil seals and wheel hubs into a single unit based on a basic rotating support. This makes installation more convenient and provides better sealing and higher precision, making them one of the key components of automobiles.

[0031] During use, wheel hub bearings have two raceways inside along their axial direction. One raceway is closer to the load-bearing side of the bearing, and the other raceway is farther away. Rolling elements are installed within both raceways.

[0032] However, in the existing technology, for the sake of design, processing and installation convenience, the diameter and volume of the rolling elements in the two raceways are the same, which reduces the support strength of the bearing on the load side and affects the performance of the product.

[0033] Example 1:

[0034] In this embodiment, as Figure 1 As shown, in order to solve the problem of reduced support strength on the force-bearing side of the wheel hub bearing, a wheel hub bearing with multi-diameter balls is provided, including an inner ring assembly 10, an outer ring assembly 30 and a rolling assembly 20, wherein the outer ring assembly 30 is sleeved on the inner ring assembly 10 and the rolling assembly 20 is disposed between the inner ring assembly 10 and the outer ring assembly 30.

[0035] The inner ring assembly 10 includes a first flange portion 14, a first raceway unit 13, and a second raceway unit 12 connected in sequence. In the direction of the central axis of the inner ring assembly 10, the first flange portion 14 is used to connect with an external structure and bears the force in the direction of the central axis of the inner ring assembly 10. The first raceway unit 13 is closer to the first flange portion 14 than the second raceway unit 12.

[0036] The outer ring assembly 30 includes a third raceway unit 31, a second flange portion 32, and a fourth raceway unit 33 connected in sequence. The second flange portion 32 is sleeved on the outer periphery of the first raceway unit 13 and the second raceway unit 12. The outer ring assembly 30 has a ring structure and is entirely sleeved on the outer periphery of the inner ring assembly 10. The third raceway unit 31 is opposite to and spaced apart from the first raceway unit 13, and the fourth raceway unit 33 is opposite to and spaced apart from the second raceway unit 12.

[0037] The rolling assembly 20 includes a first rolling unit 21 and a second rolling unit 22. The first rolling unit 21 is disposed abutting between a first raceway unit 13 and a third raceway unit 31. The outer surface of the first rolling unit 21 abuts against both the first raceway unit 13 and the third raceway unit 31, thereby improving the stability of the first rolling unit 21 and reducing its amplitude. The second rolling unit 22 is disposed abutting between a second raceway unit 12 and a fourth raceway unit 33. The outer surface of the second rolling unit 22 abuts against both the second raceway unit 12 and the fourth raceway unit 33, thereby improving its stability and reducing its amplitude. The diameter of the second rolling unit 22 is smaller than the diameter of the first rolling unit 21.

[0038] The working state of the wheel hub bearing includes: the first flange portion 14 and the second flange portion 32 are subjected to a force toward the central axis of the inner ring assembly 10. In the axial direction of the inner ring assembly 10, the first rolling unit 21 is closer to the point of force application on one side than the second rolling unit 22. Therefore, the force borne by the first rolling unit 21 is greater than the force borne by the second rolling unit 22. Increasing the diameter and volume of the first rolling unit 21 is beneficial to improving the working performance of the wheel hub bearing and extending its service life.

[0039] In other embodiments, such as Figure 2 As shown, the inner ring assembly 10 also includes a toothed end 11. When the wheel hub bearing is in use, it is connected to the external drive structure through the toothed end 11. The first flange 14 is connected to the tire. The drive structure drives the inner ring assembly 10 and the tire to rotate in sequence.

[0040] Furthermore, such as Figures 2-3 As shown, the first raceway unit 13 includes a first body 131 and a first raceway 132; one end of the first body 131 is connected to the first flange portion 14, and the other end of the first body 131 is connected to the second raceway unit 12; the first raceway 132 is disposed on the outer peripheral surface of the first body 131; the first body 131, the first flange portion 14, and the second raceway unit 12 are integrally formed, which is beneficial to improving the structural strength of the first body 131 and improving the supporting function of the first body 131.

[0041] The third raceway unit 31 includes a third body 311 and a third raceway 312; one end of the third body 311 is connected to the second flange portion 32, and the other end of the third body 311 is sealed to the first body 131; the third raceway 312 is disposed on the inner circumferential surface of the third body 311; the third body 311 and the second flange portion 32 are integrally formed, which is beneficial to improving the structural strength of the third body 311 and improving the supporting function of the third body 311.

[0042] In other embodiments, the first raceway 132 and the third raceway 312 are arranged generally opposite each other along the center of the first rolling unit 21, and the first rolling unit 21 is disposed within the raceway between the first raceway 132 and the third raceway 312. This ensures that the forces acting on the first rolling unit 21 within the first raceway 132 and the third raceway 312 are aligned along the same straight line, which helps improve the uniformity and stability of the forces acting on the first rolling unit 21 within the first raceway 132 and the third raceway 312.

[0043] The first rolling unit 21 includes a first support bracket 211 and a plurality of first rolling elements 212. The plurality of first rolling elements 212 are disposed on the first support bracket 211 and are arranged at circumferential intervals along the first support bracket 211. The first rolling elements 212 respectively abut against the first raceway 132 and the third raceway 312. The combined design of the first support bracket 211 and the plurality of first rolling elements 212 is beneficial to improving the stability of the first rolling elements 212 within the raceways.

[0044] Furthermore, such as Figures 1-2 As shown, the second raceway unit 12 includes a receiving part 121 and a filling part 122; one end of the receiving part 121 is connected to the first raceway unit 13; the filling part 122 includes a filling body 1221 and a second raceway 1222; the filling body 1221 is disposed on the receiving part 121; the second raceway 1222 is disposed on the outer peripheral surface of the filling body 1221; the combined design of the receiving part 121 and the filling part 122 helps to reduce the overall processing difficulty of the inner ring assembly 10 and improve the installation efficiency.

[0045] The fourth raceway unit 33 includes a fourth body 331 and a fourth raceway 332. One end of the fourth body 331 is connected to the second flange portion 32, and the other end of the fourth body 331 is sealed to the filling body 1221. The fourth raceway 332 is disposed on the inner circumferential surface of the fourth body 331. The second raceway 1222 and the fourth raceway 332 are arranged generally opposite to each other along the center of the second rolling unit 22, and the second rolling unit 22 is disposed in the raceway between the second raceway 1222 and the fourth raceway 332. This ensures that the forces acting on the second rolling unit 22 in the second raceway 1222 and the fourth raceway 332 are aligned on the same straight line, which helps to improve the uniformity and stability of the forces acting on the second rolling unit 22 in the second raceway 1222 and the fourth raceway 332.

[0046] The second rolling unit 22 includes a second support bracket 221 and a plurality of second rolling elements 222. The plurality of second rolling elements 222 are disposed on the second support bracket 221 and are arranged at circumferential intervals along the second support bracket 221. The second rolling elements 222 respectively abut against the second raceway 1222 and the fourth raceway 332. The diameter of the first rolling element 212 is larger than the diameter of the second rolling element 222. The combination design of the second support bracket 221 and the plurality of second rolling elements 222 is beneficial to improving the stability of the second rolling elements 222 within the raceways.

[0047] Furthermore, such as Figures 1-2As shown, the receiving part 121 includes a receiving body 1211 and a receiving groove 1212; one end of the receiving body 1211 is connected to the first raceway unit 13; the receiving groove 1212 is disposed on the outer peripheral surface of the receiving body 1211; and the filling body 1221 is disposed within the receiving groove 1212. The combined design of the receiving groove 1212 and the filling body 1221 helps to improve the stability between the filling part 122 and the receiving part 121.

[0048] Furthermore, such as Figure 3 As shown, the central angle corresponding to the first raceway 132 is smaller than the central angle corresponding to the third raceway 312. By extending the third raceway 312, the contact area between the third raceway 312 and the first rolling element 212 is increased, which is beneficial to improving the uniformity of force on the third body 311 and extending the service life of the third body 311.

[0049] Furthermore, such as Figure 3 As shown, the central angle corresponding to the third raceway 312 is greater than 90°. Since the third body 311 is relatively thinner than the first body 131, by extending the third raceway 312 and making the central angle corresponding to the third raceway 312 greater than 90°, the contact area between the third raceway 312 and the first rolling element 212 is increased, which greatly improves the uniformity of force on the third body 311 and extends the service life of the third body 311.

[0050] Furthermore, such as Figure 3 As shown, the gap between the first raceway 132 and the first rolling element 212 is smaller than the gap between the third raceway 312 and the first rolling element 212; the gap between the second raceway 1222 and the second rolling element 222 is smaller than the gap between the fourth raceway 332 and the second rolling element 222. Since the first raceway 132 and the second raceway 1222 are external bore machining surfaces, they are relatively easy to machine and have relatively high machining accuracy. Therefore, the gaps between the first raceway 132 and the second raceway 1222 and the first rolling elements 212 and 222 are designed and machined to be relatively small. Conversely, the third raceway 312 and the fourth raceway 332 are internal bore machining surfaces, which are more difficult to machine and have relatively lower machining accuracy. Therefore, the gaps between the third raceway 312 and the fourth raceway 332 and the first rolling elements 212 and 222 are designed and machined to be relatively large.

[0051] Furthermore, the ratio of the radius of the first raceway 132 to the radius of the first rolling element 212 is between 1.04 and 1.06. This facilitates a tighter fit between the first raceway 132 and the first rolling element 212, helps reduce the vibration amplitude of the first rolling element 212, and extends the service life of the first raceway 132.

[0052] Furthermore, the radius of the third raceway 312 is in the range of 1.02-1.04 to the radius of the first rolling element 212. The radius of the third raceway 312 is closer to the radius of the first rolling element 212 than the radius of the first raceway 132, resulting in a tighter fit between the third raceway 312 and the first rolling element 212. Since the third body 311 is relatively thinner than the first body 131, reducing the gap between the third body 311 and the first rolling element 212 helps to extend the service life of the third body 311.

[0053] Furthermore, such as Figure 1 As shown, L2≤L1: where the distance between the center of the first rolling element 212 and the central axis of the inner ring assembly 10 is L1, and the distance between the center of the second rolling element 222 and the central axis of the inner ring assembly 10 is L2. The greater distance between the center of the first rolling element 212 and the central axis of the inner ring assembly 10 results in less vibration affecting the first rolling element 212 compared to the second rolling element 222 during the operation of the hub bearing.

[0054] In other embodiments, the difference between L2 and L1 is between 1 mm and 2 mm. This ensures that the centers of the first rolling element 212 and the second rolling element 222 are roughly on the same straight line, reducing the vibration influence between the first rolling element 212 and the second rolling element 222.

[0055] In other embodiments, such as Figure 1 As shown, the inner end face of the second flange 32 abuts against the first rolling element 212 and the second rolling element 222, respectively. This is beneficial for increasing the spacing between the first rolling element 212 and the second rolling element 222.

[0056] In summary, to address the problem of reduced support strength of the rolling elements caused by the alignment of the rolling elements in the two raceways of a wheel hub bearing, this invention offers the following advantages:

[0057] By installing a larger diameter first rolling element on the tooth end face away from the inner ring assembly, the support strength of the first rolling element is improved, thereby improving the overall working performance of the hub bearing.

[0058] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the scope of this disclosure.

Claims

1. A hub bearing with multi-diameter balls, characterized in that, The hub bearing includes: The inner ring assembly includes a first flange portion, a first raceway unit, and a second raceway unit connected in sequence. The outer ring assembly includes a third raceway unit, a second flange portion, and a fourth raceway unit connected in sequence, wherein the second flange portion is sleeved on the outer periphery of the first raceway unit and the second raceway unit; A rolling assembly, comprising a first rolling unit and a second rolling unit; the first rolling unit is disposed abutting between a first raceway unit and a third raceway unit; the second rolling unit is disposed abutting between a second raceway unit and a fourth raceway unit; the diameter of the second rolling unit is smaller than the diameter of the first rolling unit. The working state of the hub bearing includes: the first flange portion and the second flange portion are subjected to a force toward the central axis of the inner ring assembly.

2. The hub bearing with multi-diameter balls according to claim 1, characterized in that, The first raceway unit includes a first body and a first raceway; one end of the first body is connected to the first flange, and the other end of the first body is connected to the second raceway unit; the first raceway is disposed on the outer peripheral surface of the first body; The third raceway unit includes a third body and a third raceway; one end of the third body is connected to the second flange, and the other end of the third body is sealed to the first body; the third raceway is disposed on the inner circumferential surface of the third body. The first rolling unit includes a first support bracket and a plurality of first rolling elements; the plurality of first rolling elements are disposed on the first support bracket and are arranged at intervals along the circumference of the first support bracket, and the first rolling elements respectively abut against the first raceway and the third raceway.

3. A hub bearing with multi-diameter balls according to claim 2, characterized in that, The second raceway unit includes a receiving portion and a filling portion; one end of the receiving portion is connected to the first raceway unit; the filling portion includes a filling body and a second raceway; the filling body is disposed on the receiving portion; the second raceway is disposed on the outer peripheral surface of the filling body; The fourth raceway unit includes a fourth body and a fourth raceway; one end of the fourth body is connected to the second flange, and the other end of the fourth body is sealed to the filling body; the fourth raceway is disposed on the inner circumferential surface of the fourth body. The second rolling unit includes a second support bracket and a plurality of second rolling elements; the plurality of second rolling elements are disposed on the second support bracket and are arranged at intervals along the circumference of the second support bracket; the second rolling elements respectively abut against the second raceway and the fourth raceway; the diameter of the first rolling element is larger than the diameter of the second rolling element.

4. A hub bearing with multi-diameter balls according to claim 3, characterized in that, The receiving part includes a receiving body and a receiving groove; one end of the receiving body is connected to the first raceway unit; the receiving groove is disposed on the outer peripheral surface of the receiving body; and the filling body is disposed in the receiving groove.

5. A hub bearing with multi-diameter balls according to claim 4, characterized in that, The central angle corresponding to the first raceway is smaller than the central angle corresponding to the third raceway.

6. A hub bearing with multi-diameter balls according to claim 5, characterized in that, The central angle corresponding to the third raceway is greater than 90°.

7. A hub bearing with multi-diameter balls according to claim 5, characterized in that, The gap between the first raceway and the first rolling element is smaller than the gap between the third raceway and the first rolling element; the gap between the second raceway and the second rolling element is smaller than the gap between the fourth raceway and the second rolling element.

8. A hub bearing with multi-diameter balls according to claim 5, characterized in that, The ratio of the radius of the first raceway to the radius of the first rolling element is between 1.04 and 1.

06.

9. A hub bearing with multi-diameter balls according to claim 5, characterized in that, The ratio of the radius of the third raceway to the radius of the first rolling element is between 1.02 and 1.

04.

10. A hub bearing with multi-diameter balls according to claim 5, characterized in that, L2≤L1: Wherein, the distance between the center of the first rolling element and the central axis of the inner ring assembly is L1, and the distance between the center of the second rolling element and the central axis of the inner ring assembly is L2.

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