Novel hub bearing

Abstract

This utility model discloses a novel wheel hub bearing, comprising an inner flange, an outer flange, a plurality of rolling elements movably disposed between the inner and outer flanges, and an inner ring. The outer peripheral wall of the inner flange, the inner peripheral wall of the outer flange, and the outer peripheral wall of the inner ring are all provided with raceways for the movement of the rolling elements. The inner ring is provided with splines for engaging with keyways on an external drive shaft. The sidewall of the inner ring is provided with a barrier structure to prevent some external impurities from entering the gap between the splines and the keyways after the splines engage with the external keyways. This utility model solves the problem of excessive noise during vehicle operation caused by static friction between the inner ring of traditional wheel hub bearings and the vehicle's axle system.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology, specifically a novel wheel hub bearing. Background Technology

[0002] Wheel bearings are a key component of automotive transmission systems, primarily functioning to support wheel rotation and stably transmit torque. Their performance directly affects vehicle stability, ride comfort, and overall lifespan. Third-generation wheel bearings, with their compact structure and high transmission efficiency, have become the mainstream component in both passenger and commercial vehicles. In the design and application of existing third-generation wheel bearings, the inner ring, as the core component that mates with the external drive shaft, typically uses keyways to adapt to the corresponding structure on the drive shaft to achieve effective torque transmission. However, traditional design solutions have significant technical flaws: First, the inner ring end face and the drive shaft end face are mostly in direct static friction contact. During vehicle start-up and driving, the friction between the two is prone to generating significant abnormal noise. Moreover, with the increase in usage time, the friction and wear will intensify, leading to increasingly serious noise problems and significantly reducing the driving experience. Second, the strength of the spline structure of the traditional inner ring relies solely on the overall material properties of the inner ring, without targeted reinforcement of the spline load-bearing area. This results in insufficient spline strength, making it prone to tooth surface wear and deformation when subjected to long-term torque loads. This not only further exacerbates noise generation but also weakens the transmission reliability of the wheel hub bearing and shortens its service life, failing to meet the current automotive industry's technical requirements for low-noise and high-durability transmission components. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a novel wheel hub bearing, which solves the problem of excessive noise during vehicle operation caused by static friction between the inner ring of traditional wheel hub bearings and the vehicle shaft system.

[0004] To achieve the above objectives, this utility model provides a novel wheel hub bearing, comprising an inner flange, an outer flange, a plurality of rolling elements movably disposed between the inner flange and the outer flange, and an inner ring. The outer peripheral wall of the inner flange, the inner peripheral wall of the outer flange, and the outer peripheral wall of the inner ring are all provided with raceways for the movement of the rolling elements. The inner ring is provided with a spline for engaging with a keyway on an external drive shaft. The side wall of the inner ring is provided with a barrier structure for preventing some external impurities from entering the gap between the spline and the keyway after the spline engages with the external keyway.

[0005] The advantages of adopting the above technical solution are as follows: In the above technology, the inner flange, outer flange, and inner ring work together to form a stable load-bearing and installation foundation. The raceways opened on each of the three provide a suitable motion trajectory for the rolling elements, which can ensure smooth movement of the rolling elements, reduce operating resistance, and improve the overall transmission efficiency and operating stability of the bearing. The spline on the inner ring can precisely match the keyway of the external drive shaft, ensuring no slippage or displacement during torque transmission, ensuring the reliability of power transmission, and avoiding the risk of transmission interruption. At the same time, the barrier structure on the side wall of the inner ring can actively block some external impurities from entering the gap between the spline and the keyway after the spline and keyway are matched, preventing impurities from causing wear on the spline and keyway, extending the service life of the mating structure, and avoiding transmission noise caused by impurities affecting the fitting accuracy. This improves the stability and ride comfort of the bearing during use. The overall structure takes into account transmission efficiency, reliability, and impurity protection capabilities.

[0006] The present invention further comprises: the barrier structure including a barrier ring circumferentially disposed on the inner ring sidewall, the end wall of the barrier ring being connected to the inner peripheral wall with a smooth inclined surface, and the end wall of the barrier ring protruding from the spline position.

[0007] The advantages of adopting the above technical solution are as follows: The circumferentially arranged barrier ring on the inner sidewall can form a circumferentially continuous impurity blocking barrier, expanding the impurity interception range, avoiding the leakage of impurities in local gaps, and ensuring the overall cleanliness of the mating area. The smooth inclined surface design between the end wall of the barrier ring and the inner circumferential wall can reduce the accumulation of airflow or impurities on the surface of the barrier ring, reduce the probability of impurity adhesion, and at the same time avoid stress concentration caused by structural corners, improve the structural strength of the barrier ring itself, and prevent breakage or deformation after long-term use. Furthermore, the setting of the barrier ring end wall protruding from the spline position can form a pre-block before the spline and keyway mate, intercepting impurities approaching the gap in advance, further improving the impurity blocking effect, ensuring that the spline and keyway mating area is always in a clean state, reducing mating wear, maintaining a stable torque transmission state, and taking into account the blocking range, structural strength, and interception timeliness.

[0008] The present invention further provides that the end wall surface of the barrier ring is a machining surface used as a machining reference surface during the grinding process of the inner ring.

[0009] The advantages of adopting the above technical solution are: the end wall of the barrier ring serves as the machining reference surface for the inner ring grinding process, providing a precise positioning reference for the grinding tool during the machining process, avoiding machining deviations caused by unclear references, improving the overall machining accuracy of the inner ring, ensuring that the structural dimensions of the inner ring meet the design requirements, and using this end wall as a reference can ensure the relative positional accuracy between the inner ring raceway, spline and barrier ring, reduce positional deviations during the assembly of various components, improve the overall assembly accuracy and operational coordination of the bearing, and avoid operational jamming or abnormal noise caused by positional deviations.

[0010] The present invention is further configured such that: the right end wall of the inner flange is located near the right end wall of the inner ring, the right end wall of the inner ring protrudes from the right end wall of the inner flange and forms a protruding surface, and the spline is located on the protruding surface.

[0011] The advantages of adopting the above technical solution are as follows: the arrangement of the right end wall of the inner flange close to the right end wall of the inner ring can shorten the distance between the two, reduce the axial space occupied inside the bearing, make the overall bearing structure more compact, adapt to the installation space requirements of more vehicle models, and improve application flexibility. The protruding surface formed by the right end wall of the inner ring and the right end wall of the inner flange can provide an independent and suitable installation area for the spline, avoid structural interference between the spline and the inner flange, ensure the installation stability of the spline, and prevent the spline from deforming due to interference. The setting of the spline on the protruding surface can make the spline and the external drive shaft more directly fit, shorten the power transmission path, reduce energy loss in the torque transmission process, and improve transmission efficiency. At the same time, the structure of the protruding surface can reduce the frictional contact between the spline and other components during the spline fit, reduce the probability of frictional noise, improve the smoothness of bearing operation, and balance the compactness of structure, transmission efficiency and smoothness of operation.

[0012] The present invention further comprises: a plurality of slots are evenly distributed circumferentially on the outer peripheral wall of the inner flange, and a plurality of blocks are evenly distributed circumferentially on the inner peripheral wall of the inner ring, wherein the plurality of blocks correspond one-to-one with the plurality of slots and are engaged and fitted together, and the radial cross section of the blocks is trapezoidal and the shape of the blocks is adapted to the shape of the slots.

[0013] The advantages of adopting the above technical solution are as follows: the corresponding locking grooves on the outer circumferential wall of the inner flange and the locking blocks on the inner circumferential wall of the inner ring enable rapid positioning and assembly of the inner flange and inner ring, reducing the time for position adjustment during assembly and improving assembly efficiency. Simultaneously, the locking structure effectively restricts the relative rotation between the inner flange and inner ring, ensuring synchronous operation, improving the synchronicity and reliability of torque transmission, avoiding component wear caused by relative rotation, and extending the service life of the mating structure. Furthermore, the trapezoidal radial cross-section of the locking blocks, adapted to the shape of the locking grooves, increases the contact area between the blocks and grooves, enhancing the load-bearing capacity of the locking structure and preventing loosening due to long-term stress. The guiding characteristics of the trapezoidal structure facilitate the insertion of the locking blocks into the grooves, reducing the difficulty of assembly operations and allowing assembly to be completed without complex tools, thus balancing assembly convenience, connection stability, and load-bearing capacity.

[0014] The present invention further includes a sealing gasket between the outer peripheral wall of the card block and the inner peripheral wall of the card slot, the sealing gasket being made of elastic rubber material.

[0015] The advantages of adopting the above technical solution are: the sealing gasket that expands and fits between the outer peripheral wall of the card block and the inner peripheral wall of the card groove can fully fill the gap between the two, prevent external dust, oil and other impurities from entering the mating area, prevent the card groove and card block from loosening due to wear caused by impurities, ensure the stable connection between the inner flange and the inner ring, maintain reliable torque transmission, and the sealing gasket is made of elastic rubber material. Its elastic properties can absorb the vibration between the inner flange and the inner ring during the operation of the bearing, reduce vibration transmission, and reduce abnormal noise generated by vibration. Attached Figure Description

[0016] Figure 1 This is a three-dimensional view of the present invention; Figure 2 This is a front sectional view of the present invention; Figure 3 This is a side sectional view of the present invention. Detailed Implementation

[0017] This utility model provides a novel wheel hub bearing, including an inner flange 2, an outer flange 1, a plurality of rolling elements 11 movably disposed between the inner flange 2 and the outer flange 1, and an inner ring 3. The outer peripheral walls of the inner flange 2, the outer peripheral wall of the outer flange 1, and the outer peripheral wall of the inner ring 3 are all provided with raceways 12 for the movement of the rolling elements 11. The inner ring 3 is provided with a spline 31 for engaging with a keyway on an external drive shaft. The side wall of the inner ring 3 is provided with a barrier structure to prevent some external impurities from entering the gap between the spline 31 and the keyway after the spline 31 engages with the external keyway. The barrier structure includes a barrier ring 32 circumferentially disposed on the side wall of the inner ring 3. The end wall of the barrier ring 32 is connected to the inner peripheral wall with a smooth inclined surface. The end wall of the barrier ring 32 protrudes from the position of the spline 31. For use as a machining reference surface 321 during the grinding process of the inner ring 3, the right end wall of the inner flange 2 is located near the right end wall of the inner ring 3. The right end wall of the inner ring 3 protrudes from the right end wall of the inner flange 2 and forms a protruding surface 33. The spline 31 is located on the protruding surface 33. A plurality of slots 21 are evenly distributed circumferentially on the outer peripheral wall of the inner flange 2. A plurality of locking blocks 34 are evenly distributed circumferentially on the inner peripheral wall of the inner ring 3. The plurality of locking blocks 34 correspond one-to-one with the plurality of slots 21 and are locked in place. The radial cross section of the locking block 34 is trapezoidal and the shape of the locking block 34 is adapted to the shape of the slot 21. A sealing gasket 341 is provided between the outer peripheral wall of the locking block 34 and the inner peripheral wall of the slot 21. The sealing gasket 341 is made of elastic rubber.

[0018] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications may be made to this utility model without departing from its spirit and scope. All such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A novel hub bearing, comprising an inner flange, an outer flange, a plurality of rolling elements movably disposed between the inner flange and the outer flange, and an inner ring, wherein the outer peripheral wall of the inner flange, the inner peripheral wall of the outer flange, and the outer peripheral wall of the inner ring are all provided with raceways for the movement of the rolling elements, characterized in that: The inner ring is provided with a spline for engaging with a keyway on an external drive shaft, and the inner ring sidewall is provided with a barrier structure to prevent some external impurities from entering the gap between the spline and the keyway after the spline engages with the external keyway.

2. The novel hub bearing according to claim 1, characterized in that: The barrier structure includes a barrier ring circumferentially disposed on the inner sidewall, wherein the end wall of the barrier ring is connected to the inner peripheral wall with a smooth inclined surface, and the end wall of the barrier ring protrudes from the spline position.

3. The novel hub bearing according to claim 2, characterized in that: The barrier ring end wall is a machining surface used as a machining reference surface during the grinding process of the inner ring.

4. The novel hub bearing according to claim 1, characterized in that: The right end wall of the inner flange is located near the right end wall of the inner ring. The right end wall of the inner ring protrudes from the right end wall of the inner flange and forms a protruding surface. The spline is located on the protruding surface.

5. A novel hub bearing according to claim 1, characterized in that: The outer circumferential wall of the inner flange is provided with a number of slots, and the inner circumferential wall of the inner ring is provided with a number of blocks. Each block corresponds to a slot and is engaged with it. The radial cross-section of the block is trapezoidal and the shape of the block is adapted to the shape of the slot.

6. A novel hub bearing according to claim 5, characterized in that: A sealing gasket is provided between the outer peripheral wall of the card block and the inner peripheral wall of the card slot, and the sealing gasket is made of elastic rubber material.

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