A high load bearing wheel hub unit

Abstract

The utility model discloses a kind of high bearing's wheel hub units, including inner wall with inner ring of screw tooth slot, the connecting seat fixed in one end of inner ring, the outer ring of being sleeved in the outer portion of inner ring, the mounting seat fixed in outer ring end part and the bearing of multiple groups of uniform settings, the bearing is set between inner ring and outer ring with interference adaptation;The other end of the inner ring is equipped with sealing cover;The connecting part of the inner ring and sealing cover is symmetrically provided with mounting mechanism;The connecting part of the mounting seat and outer ring is uniformly provided with multiple groups of auxiliary support components along circumference direction.The utility model belongs to wheel hub technical field, specifically refers to a kind of high bearing's wheel hub unit.

Description

Technical Field

[0001] This utility model belongs to the field of wheel hub technology, specifically referring to a high load-bearing wheel hub unit. Background Technology

[0002] As a key load-bearing and transmission component in mechanical equipment (especially vehicles), the core function of the wheel hub unit is to support radial loads, transmit torque, and ensure the flexible operation of rotating parts. A typical wheel hub unit usually consists of a splined inner ring, an outer ring, and a bearing positioned between them.

[0003] In the existing technology, this type of hub unit has several pain points that urgently need to be addressed. First, in terms of sealing, the end caps are mostly fixed with bolt groups or simple snap-fit ​​structures, which are inconvenient to disassemble and assemble. Special tools are required when maintaining the internal bearings, which is time-consuming and labor-intensive. Moreover, after long-term use, the bolts are prone to loosening and the snap-fits are prone to wear, resulting in a decrease in sealing reliability. Dust, moisture and other contaminants can easily enter the bearing cavity, accelerating bearing wear and grease deterioration, and affecting the service life of the entire unit.

[0004] Secondly, regarding bearing fixation and stability, traditional interference fits may develop clearances under long-term high loads or impact loads due to slight material creep or vibration, leading to fretting wear or axial movement, abnormal noise, or even failure. Especially for multi-bearing configurations aiming for high load capacity, ensuring coordinated positioning and long-term stability of multiple bearings, and preventing premature failure of individual bearings due to uneven loading, is a key challenge.

[0005] Furthermore, in terms of load-bearing capacity and structural optimization, conventional dual-bearing configurations are already struggling to cope with the ever-increasing load demands, and simply increasing the bearing size would put pressure on cost and space. Utility Model Content

[0006] To address the aforementioned problems of inconvenient disassembly and assembly of the sealing structure, insufficient reliability, easy axial movement of bearings under long-term use, and limited load-bearing capacity of traditional double-bearing structures, this utility model provides a high-load-bearing hub unit.

[0007] To achieve the above functions, the technical solution adopted by this utility model is as follows: a high load-bearing hub unit, including an inner ring with spline grooves on the inner wall, a connecting seat fixed to one end of the inner ring, an outer ring sleeved on the outside of the inner ring, a mounting seat fixed to the end of the outer ring, and multiple sets of evenly arranged bearings, wherein the bearings are interference-fitted between the inner ring and the outer ring. A sealing cap is installed at the other end of the inner ring; The connection between the inner ring and the sealing cap is symmetrically provided with an installation mechanism; The connection between the mounting base and the outer ring is provided with multiple sets of auxiliary support components evenly distributed circumferentially.

[0008] Furthermore, the mounting mechanism includes an arc-shaped groove at the end of the inner ring, a through groove communicating with the arc-shaped groove, a return spring fixed to the inner wall of the arc-shaped groove, a top block fixed to the free end of the return spring, and mounting components symmetrically arranged on the sealing cover. The arc-shaped groove is connected to the outside; The through slot is arc-shaped and connected to the outside; The mounting components can be snapped into the arc-shaped groove and the through groove.

[0009] Furthermore, the mounting assembly includes a connecting block fixed to the sealing cover and a mounting block disposed at the end of the connecting block; The connecting block adapter is fitted into the through groove, and the mounting block adapter is fitted into the arc-shaped groove.

[0010] Furthermore, the mounting block is provided with an inclined portion; The top block is provided with an inclined surface that cooperates with the inclined part.

[0011] Furthermore, the auxiliary support assembly includes a slot opened in the mounting base facing the axial direction, an elastic spring fixed to the inner wall of the slot, and a protrusion provided at the opening of the slot, wherein the two ends of the elastic spring are fixedly connected to the inner wall of the slot and the protrusion, respectively. The outer ring end is fixed with a limit support block.

[0012] Furthermore, the protrusion is provided with an inclined portion.

[0013] Furthermore, the bearings are provided in three sets, which are evenly arranged along the axial direction with a certain gap; The outer wall of the inner ring is interference-fitted with the inner wall of the bearing, and the inner wall of the outer ring is interference-fitted with the outer wall of the bearing.

[0014] Furthermore, a blocking block is provided in the middle of the inner end of the sealing cover; The sealing cap is provided with a handle at the outer end.

[0015] Furthermore, the mounting base is provided with four sets of threaded holes.

[0016] Furthermore, the connecting seat is provided with five sets of mounting screw holes evenly distributed along the circumference, and mounting bolts are threaded into the mounting screw holes.

[0017] Compared with the prior art, the present invention achieves the following beneficial effects by adopting the above structure: 1. Through the coordinated design of the installation mechanism, quick and reliable assembly and disassembly of the sealing cover and inner ring are achieved. During installation, the inclined part of the mounting block and the inclined surface of the top block cooperate to convert the axial thrust into radial displacement, causing the top block to compress the return spring and move out of position. After installation, the return spring pushes the top block to return to its original position and forms a self-locking mechanism, effectively preventing the sealing cover from loosening. During disassembly, the locking force can be overcome by rotating the sealing cover with the handle. The operation is simple and requires no special tools, greatly improving the ease of maintenance of the sealing cover, while ensuring the reliability of the seal, effectively preventing dust and water, and preventing grease loss.

[0018] 2. The auxiliary support components and limiting blocks work together to form a bidirectional axial limiting and elastic support for the bearing. The protrusion, under the action of the elastic spring, provides continuous axial support force, working in conjunction with the fixed limiting blocks to effectively suppress axial movement and radial offset of the bearing during operation. Simultaneously, the inclined portion on the protrusion allows the elastic spring to automatically compress during bearing installation, causing the protrusion to retract. After installation, it automatically pops out and locks, simplifying the assembly process and enhancing the stability and reliability of the bearing under long-term high-load operation.

[0019] 3. By adopting a scheme in which three sets of bearings are evenly spaced along the axial direction, compared with the traditional dual-bearing structure, the radial and axial loads can be distributed more evenly, which significantly improves the overall load-bearing capacity and rigidity of the hub unit and extends its service life. Attached Figure Description

[0020] Figure 1 This invention provides a schematic diagram of the overall structure of a high-load-bearing hub unit. Figure 1 ; Figure 2 This invention provides a schematic diagram of the overall structure of a high-load-bearing hub unit. Figure 2 ; Figure 3 A cross-sectional view of a high load-bearing hub unit proposed in this utility model. Figure 1 ; Figure 4 A cross-sectional view of a high load-bearing hub unit proposed in this utility model. Figure 2 ; Figure 5 This is a schematic diagram of the overall structure of the sealing cap proposed in this utility model; Figure 6 This is a partial structural diagram of a high load-bearing hub unit proposed in this utility model; Figure 7 for Figure 6 Enlarged view of a portion of point A in the middle; Figure 8 for Figure 6 Sectional view in; Figure 9 for Figure 8 Enlarged view of section B in the middle.

[0021] Among them, 1. Inner ring, 11. Spline tooth groove, 2. Connecting seat, 21. Mounting bolt, 3. Outer ring, 4. Mounting seat, 41. Threaded hole, 5. Bearing, 6. Sealing cover, 61. Block, 62. Handle, 7. Mounting mechanism, 71. Arc groove, 72. Through groove, 73. Return spring, 74. Top block, 75. Mounting assembly, 751. Connecting block, 752. Mounting block, 8. Auxiliary support assembly, 81. Slot, 82. Elastic spring, 83. Protrusion, 84. Limiting block. Detailed Implementation

[0022] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] Unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. The present invention will be further described in detail below with reference to the accompanying drawings.

[0025] like Figure 1-9As shown, this utility model provides a high-load-bearing wheel hub unit, including an inner ring 1 with splined grooves 11 on its inner wall, a connecting seat 2 fixed to one end of the inner ring 1, an outer ring 3 sleeved on the outside of the inner ring 1, a mounting seat 4 fixed to the end of the outer ring 3, and multiple sets of evenly arranged bearings 5. The bearings 5 ​​are interference-fitted between the inner ring 1 and the outer ring 3, which can ensure that the inner ring 1 can rotate flexibly relative to the outer ring 3, and can transmit radial and axial loads. The splined grooves 11 of the inner ring 1 are used to achieve precise transmission with shaft components. The connecting seat 2 and the mounting seat 4 provide mounting bases for the wheel hub unit and the wheel, body (or frame), respectively. A sealing cap 6 is installed at the other end of the inner ring 1. The sealing cap 6 is installed at the end of the inner ring 1, and an annular sealing groove is opened on the contact surface between the sealing cap 6 and the end of the inner ring 1. An O-ring seal (not shown in the figure) is installed in the groove. When the sealing cap 6 is fixed to the end of the inner ring 1 by the mounting mechanism 7, the O-ring seal is axially compressed and produces elastic deformation, tightly filling the mating gap between the sealing cap 6 and the end face of the inner ring 1, forming the first main seal. This structure can effectively prevent dust, water vapor, etc. from entering from the end face mating gap, and can block external dust, water vapor, impurities, etc. from entering the bearing 5 area between the inner ring 1 and the outer ring 3, avoiding wear and corrosion of the bearing 5 due to contaminant intrusion. At the same time, it can reduce the loss of internal grease of the bearing 5, ensure the long-term stable operation of the bearing 5, and extend the service life of the hub unit. A mounting mechanism 7 is symmetrically provided at the connection between the inner ring 1 and the sealing cover 6, which is used to fix the sealing cover 6 to the end of the inner ring 1. Multiple sets of auxiliary support components 8 are evenly provided circumferentially at the connection between the mounting base 4 and the outer ring 3 to enhance the installation stability of the bearing 5. They can form a uniform support force on the bearing 5 from the side. Together with the radial positioning of the bearing 5 by the outer ring 3 and the inner ring 1, they can prevent the bearing 5 from axial movement or radial displacement during loading or rotation, further improving the structural stability of the bearing 5 after installation and indirectly enhancing the load-bearing capacity of the hub unit.

[0026] like Figure 3 , 5As shown in Figure 9, the mounting mechanism 7 includes an arc-shaped groove 71 at the end of the inner ring 1, a through groove 72 communicating with the arc-shaped groove 71, a return spring 73 fixed to the inner wall of the arc-shaped groove 71, a top block 74 fixed to the free end of the return spring 73, and mounting components 75 symmetrically arranged on the sealing cover 6; the arc-shaped groove 71 communicates with the outside; the through groove 72 is arc-shaped and communicates with the outside; the mounting components 75 can be inserted into the arc-shaped groove 71 and the through groove 72; the mounting components 75 include a connecting block 751 fixed to the sealing cover 6 and a mounting block 752 located at the end of the connecting block 751; the connecting block 751 is adapted to be inserted into the through groove 72; in addition, the mating surfaces of the connecting block 751 and the through groove 72, and the mating surfaces of the mounting block 752 and the arc-shaped groove 71, can be coated with a layer of grease or a polymer sealing coating. This not only suppresses fretting wear but also utilizes its adhesiveness to fill microscopic gaps, forming an auxiliary secondary sealing barrier to further enhance dustproof and moisture-proof performance. The mounting block 752 is fitted into the arc-shaped groove 71. During installation, first align the mounting component 75 of the sealing cover 6 with the arc-shaped groove 71 and insert it. The mounting component 75 presses against the top block 74, compressing the return spring 73. After installation, the return spring 73 automatically resets and pushes the top block 74 against the mounting component 75. At this time, the connecting block 751 of the mounting component 75 is fitted into the through groove 72. The mounting block 752 is fitted into the arc-shaped groove 71. The pressing action of the top block 74 prevents the mounting component 75 from loosening in the arc-shaped groove 71, thus achieving quick and reliable fixing of the sealing cover 6 and the inner ring 1. The overall structure is simple and easy to operate. The fitting of the mounting block 752 and the arc-shaped groove 71 can achieve circumferential fixing of the sealing cover 6 and the inner ring 1. The cooperation between the connecting block 751 and the through groove 72 plays a guiding role in the installation. The two form a double positioning structure of first guiding and then fixing, which can ensure that the sealing cover 6 is firmly installed at the end of the inner ring 1. The mounting block 752 is provided with an inclined portion; the top block 74 is provided with an inclined surface that cooperates with the inclined portion. During installation, the mounting block 752 presses against the inclined surface of the top block 74, which can convert the axial thrust of the mounting block 752 into the radial force of the top block 74 compressing the return spring 73. The mounting block 752 can be smoothly inserted into the arc groove 71 without additional operation. After installation, the return spring 73 pushes the top block 74 to return to its original position. The inclined surface of the top block 74 is in close contact with the inclined portion of the mounting block 752, which can effectively prevent the mounting block 752 from coming out of the arc groove 71 and improve the self-locking performance of the mounting mechanism 7.

[0027] like Figure 1 and 4As shown, the auxiliary support assembly 8 includes a slot 81 opened in the mounting base 4 facing the axial direction, an elastic spring 82 fixed to the inner wall of the slot 81, and a protrusion 83 provided at the opening of the slot 81. The two ends of the elastic spring 82 are fixedly connected to the inner wall of the slot 81 and the protrusion 83, respectively. A limiting block 84 is fixed to the end of the outer ring 3. The auxiliary support assembly 8 and the limiting block 84 together stably limit the bearing 5 between the inner ring 1 and the outer ring 3. The elastic spring 82 provides a continuous elastic thrust to the protrusion 83, so that the protrusion 83 always has a tendency to extend in the axial direction. The limiting block 84 provides axial blocking from one side of the bearing 5, and the protrusion 83 provides elastic support from the other side of the bearing 5. The two form a bidirectional axial limiting structure. When the bearing 5 is under load and has a tendency to move axially, the elastic support of the protrusion 83 can buffer the impact force, and the limiting block 84 can limit the excessive displacement of the bearing 5. Together, they ensure that the bearing 5 is stably installed between the inner and outer rings 3, and avoid wear or structural failure of the bearing 5 due to movement. The protrusion 83 is provided with an inclined portion, which provides guidance for the installation of the bearing 5. When installing the bearing 5, the end face of the bearing 5 presses against the inclined portion of the protrusion 83, which can convert the axial installation force of the bearing 5 into the radial force of the protrusion 83 compressing the elastic spring 82, so that the protrusion 83 automatically retracts into the slot 81. The installation of the bearing 5 can be completed without manual operation of the protrusion 83, simplifying the installation process. After installation, the elastic spring 82 loses the compressive force of the bearing 5, quickly resets and pushes the protrusion 83 out of the slot 81. The non-inclined surface of the protrusion 83 is in close contact with the side of the bearing 5, forming a stable axial support, which takes into account both the ease of installation and the reliability of support. Considering the characteristics of the hub unit being in a high vibration, high load and temperature fluctuation environment for a long time, both the reset spring 73 and the elastic spring 82 are made of high-durability spring materials, specifically precipitation hardening stainless steel (such as 17-7PH). This type of material has excellent mechanical properties and environmental adaptability.

[0028] like Figure 3 , 4 As shown in Figure 8, there are three sets of bearings 5, which are evenly arranged along the axial direction with a certain gap. The outer wall of the inner ring 1 is interference-fitted with the inner wall of the bearing 5, and the inner wall of the outer ring 3 is interference-fitted with the outer wall of the bearing 5. The three sets of bearings 5 ​​are evenly arranged along the axial direction, which can evenly distribute the load borne by the hub unit to each bearing 5. Compared with the traditional double bearing 5 structure, it can distribute the radial and axial loads more evenly, which significantly improves the overall load-bearing capacity and rigidity of the hub unit. The certain gap between adjacent bearings 5 ​​can prevent the bearings 5 ​​from squeezing each other due to heat expansion during operation, prevent the bearings 5 ​​from jamming, and ensure their rotational flexibility.

[0029] like Figure 3 , 4As shown in Figure 5, a blocking block 61 is provided in the middle of the inner end of the sealing cover 6 to block the opening at the end of the inner ring 1, preventing external contaminants from entering the bearing 5 area from the central hole of the inner ring 1, further enhancing the sealing effect, especially suitable for scenarios where the inner ring 1 has a hollow structure; a handle 62 is provided at the outer end of the sealing cover 6, which provides a force point for disassembling the sealing cover 6. When it is necessary to maintain the bearing 5, the sealing cover 6 can be easily removed from the end of the inner ring 1 by grasping the handle 62 and rotating the sealing cover 6 without the need for special tools, thus improving the convenience of maintenance operations.

[0030] like Figure 1-4 As shown in Figures 6 and 8, the mounting base 4 has four sets of threaded holes 41, which are evenly distributed around the circumference of the mounting base 4. The mounting base 4 can be rigidly connected to the vehicle frame by bolts. The even distribution of the four sets of bolts can balance the force on the mounting base 4, avoiding deformation or loosening of the mounting base 4 due to local stress concentration, ensuring the overall installation of the wheel hub unit is stable, and providing a reliable installation foundation for load transfer. The connecting base 2 has five sets of mounting screw holes evenly distributed around the circumference. The mounting screw holes are threaded with mounting bolts 21. The mounting bolts 21 can tightly fix the connecting base 2 to the wheel hub. The even distribution of multiple sets of bolts can evenly transfer the force of the wheel to the connecting base 2, and then to the outer ring 3 and the mounting base 4 through the inner ring 1 and the bearing 5, and finally to the vehicle body. This avoids local stress concentration caused by uneven bolt distribution, ensures the reliability of the connection between the wheel and the wheel hub unit, and improves driving safety.

[0031] In practical use 1. Bearing 5 Installation: Place the three sets of bearings 5 ​​sequentially into the assembly position between the outer ring 3 and the inner ring 1. During installation, the end face of the bearing 5 will press against the inclined portion of the protrusion 83, forcing the protrusion 83 to compress the elastic spring 82 and retract into the slot 81. After the bearing 5 is installed in place, the elastic spring 82 pushes the protrusion 83 to return to its original position and extend, with its non-inclined surface in close contact with the side of the bearing 5. At this time, the protrusion 83 and the limiting support block 84 fixed to the end of the outer ring 3 work together to stably limit the bearing 5 from both sides, effectively preventing axial movement during operation.

[0032] 2. Installation of Sealing Cover 6: Align the mounting assembly 75 (including connecting block 751 and mounting block 752) on the sealing cover 6 with the arc-shaped groove 71 and through groove 72 at the end of the inner ring 1. Push the sealing cover 6 axially until the inclined portion of the mounting block 752 contacts the inclined surface of the top block 74. Continue applying force; the inclined surface engagement converts the axial thrust into the radial displacement of the top block 74, causing it to compress the return spring 73 and retract. When the mounting block 752 is fully engaged in the arc-shaped groove 71 and the connecting block 751 enters the through groove 72, the return spring 73 pushes the top block 74 to return to its original position, and its inclined surface fits tightly against the inclined portion of the mounting block 752, achieving self-locking and completing the reliable fixing of the sealing cover 6. The handle 62 provides a force point for subsequent disassembly and maintenance.

[0033] 3. Vehicle assembly: Use five sets of mounting bolts 21 through the five sets of mounting screw holes on the connecting seat 2 to fix the wheel hub unit to the wheel; then use four sets of bolts through the four sets of threaded holes 41 on the mounting seat 4 to install the entire wheel hub unit to the frame.

[0034] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A high-load-bearing hub unit, comprising an inner ring (1) with splined grooves (11) on its inner wall, a connecting seat (2) fixed to one end of the inner ring (1), an outer ring (3) sleeved on the outside of the inner ring (1), a mounting seat (4) fixed to the end of the outer ring (3), and a plurality of evenly arranged bearings (5), wherein the bearings (5) are interference-fitted between the inner ring (1) and the outer ring (3), characterized in that: A sealing cap (6) is installed at the other end of the inner ring (1); The inner ring (1) and the sealing cover (6) are symmetrically provided with mounting mechanisms (7); The connection between the mounting base (4) and the outer ring (3) is provided with multiple sets of auxiliary support components (8) evenly distributed circumferentially.

2. The high load-bearing hub unit according to claim 1, characterized in that: The mounting mechanism (7) includes an arc-shaped groove (71) opened at the end of the inner ring (1), a through groove (72) communicating with the arc-shaped groove (71), a return spring (73) fixed to the inner wall of the arc-shaped groove (71), a top block (74) fixed to the free end of the return spring (73), and mounting components (75) symmetrically arranged on the sealing cover (6). The arc-shaped groove (71) is connected to the outside; The through groove (72) is arc-shaped and communicates with the outside; The mounting component (75) can be inserted into the arc groove (71) and the through groove (72).

3. The high load-bearing hub unit according to claim 2, characterized in that: The mounting assembly (75) includes a connecting block (751) fixed to the sealing cover (6) and a mounting block (752) located at the end of the connecting block (751). The connecting block (751) is adapted to be inserted into the through groove (72), and the mounting block (752) is adapted to be inserted into the arc groove (71).

4. A high-load-bearing hub unit according to claim 3, characterized in that: The mounting block (752) is provided with an inclined portion; The top block (74) is provided with an inclined surface that cooperates with the inclined part.

5. A high-load-bearing hub unit according to claim 1, characterized in that: The auxiliary support assembly (8) includes a slot (81) opened in the mounting base (4) facing the axial direction, an elastic spring (82) fixed to the inner wall of the slot (81), and a protrusion (83) provided at the opening of the slot (81). The two ends of the elastic spring (82) are fixedly connected to the inner wall of the slot (81) and the protrusion (83) respectively. The outer ring (3) has a limit block (84) fixed at its end; The auxiliary support assembly and the limiting block (84) together stably limit the bearing (5) between the inner ring (1) and the outer ring (3).

6. A high-load-bearing hub unit according to claim 5, characterized in that: The protrusion (83) is provided with an inclined portion.

7. A high-load-bearing hub unit according to claim 1, characterized in that: The bearing (5) is provided in three sets, which are evenly arranged along the axial direction with a certain gap. The outer wall of the inner ring (1) is interference-fitted with the inner wall of the bearing (5), and the inner wall of the outer ring (3) is interference-fitted with the outer wall of the bearing (5).

8. A high-load-bearing hub unit according to claim 1, characterized in that: The sealing cap (6) has a blocking block (61) in the middle of its inner end. The sealing cap (6) is provided with a handle (62) at its outer end.

9. A high-load-bearing hub unit according to claim 1, characterized in that: The mounting base (4) is provided with four sets of threaded holes (41).

10. A high-load-bearing hub unit according to claim 1, characterized in that: The connecting seat (2) is provided with five sets of mounting screw holes evenly distributed along the circumference, and mounting bolts (21) are threaded into the mounting screw holes.

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