Brake disc hub assembly and wheel end assembly thereof

Abstract

The utility model discloses a brake disc hub assembly and a wheel end assembly thereof, the brake disc hub assembly comprises a brake disc and a split type hub assembly, the split type hub assembly comprises a wheel disc connecting body and a bearing mounting cylinder, the wheel disc connecting body is fixedly connected with the bearing mounting cylinder through a first bolt, and the bearing mounting cylinder is fixedly connected with the wheel disc connecting body through a second bolt. The wheel disc connecting body comprises a rim connecting flange, a flange end cover and a disc body connecting part, the disc body connecting part is provided with a plurality of connecting column claws which are evenly distributed around the circumference of the center line of the wheel disc connecting body, the brake disc comprises a brake ring body part, and an inwards-concave connecting ring body part is arranged on the inner side of the brake ring body part in the radial direction; a connecting column claw limiting convex ring and a plurality of connecting column claw limiting grooves are arranged on the side face, close to the wheel disc connecting body, of the connecting ring body part, the connecting ends of the connecting column claws are located between the connecting column claw limiting convex ring and the connecting column claw limiting grooves, and the connecting column claws are fixedly connected with the brake disc through second bolts. The installation size of the brake disc hub assembly is reduced, and then the installation space of the wheel end assembly is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile wheel ends, and particularly relates to a brake disc hub component and a wheel end assembly thereof. Background Art

[0002] In the prior art, brake discs are generally made of gray cast iron HT250. Gray cast iron has a high density and good mechanical properties. Therefore, brake discs made of gray cast iron HT250 have high wear resistance, strength and rigidity. However, due to the limitations of structure and installation space, the heat capacity and heat dissipation of the brake disc are not enough to completely dissipate the heat generated during braking; at the same time, the high temperature generated during braking will cause the brake disc to expand thermally, causing the friction surface of the brake disc to be subjected to tensile stress on one side and compressive stress on the other side, so the brake disc is prone to thermal cracking. At the same time, the overall use of gray cast iron HT250 material not only makes the brake disc heavy, but also causes the front axle to be heavy and consumes high energy. With the promotion of energy-saving and emission reduction policies, lightweighting of wheel-end components is an inevitable result, and it is necessary to achieve lightweighting on the basis of ensuring structural strength. Aluminum alloy, as a current alternative material for lightweight automotive parts, has good heat capacity and thermal conductivity, but due to its poor wear resistance, it is not suitable to replace all the materials of the brake disc with aluminum alloy.

[0003] In addition, the dynamic balance value of the gray cast iron brake disc in the prior art is large. When the vehicle is running at high speed, the high-speed rotation of the wheels will cause the wheels to vibrate. Utility Model Content

[0004] In order to overcome the deficiencies of the above-mentioned prior art, the technical problem to be solved by the utility model is to provide a brake disc hub assembly and a wheel end assembly thereof, which not only reduces the installation size but also greatly reduces the overall weight, thereby saving the installation space of the wheel end assembly.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A brake disc hub assembly, comprising a brake disc and a split hub assembly, characterized in that:

[0007] The split wheel hub assembly comprises a wheel disc connector and a bearing mounting cylinder, wherein the wheel disc connector and the bearing mounting cylinder are fixedly connected by a first bolt.

[0008] The wheel disc connector includes a rim connecting flange, a flange end cover and a disc body connecting portion which are sequentially distributed from the outer end to the inner end.

[0009] The disc body connection part is provided with a plurality of connection column claws evenly distributed around the center line circumference of the wheel disc connection body, and a weight reduction hole is provided between two adjacent connection column claws.

[0010] The brake disc comprises a brake ring body, wherein the brake ring body is provided with an inner brake surface and an outer brake surface.

[0011] In the radial direction, an inwardly concave connecting ring body is provided on the inner side of the brake ring body, and a connecting column claw limiting convex ring and a plurality of connecting column claw limiting grooves are provided on the side of the connecting ring body close to the wheel disc connector, the connecting end of the connecting column claw is located between the connecting column claw limiting convex ring and the connecting column claw limiting groove, and the connecting column claw is fixedly connected to the brake disc by a second bolt.

[0012] Preferably, the flange end cover comprises an integrally arranged flange portion and an end cover portion, wherein the flange portion is located on the outer side of the end cover portion in the radial direction, and the flange portion is provided with a plurality of first mounting holes evenly distributed along the circumference for mounting the first bolts.

[0013] A plurality of second mounting holes are formed on the end surface of the bearing mounting cylinder body connected to the flange end cover, and the second mounting holes are arranged in a one-to-one correspondence with the first mounting holes.

[0014] Preferably, a bearing mounting hole for mounting the bearing and a lubrication cavity for accommodating a lubricating medium are provided in the bearing mounting cylinder.

[0015] Preferably, a positioning arc surface adapted to the outer peripheral surface of the connecting column claw limiting convex ring is provided on the inner side of each connecting column claw.

[0016] Preferably, the brake disc is provided with a plurality of third mounting holes for installing the second bolts, and the plurality of third mounting holes are arranged in a circular array around the central axis of the brake disc, and the third mounting holes are located in the limiting groove of the connecting column claw, and the connecting column claw is provided with a fourth mounting hole, and the fourth mounting hole is arranged one-to-one with the third mounting holes.

[0017] Preferably, the rim connecting flange is provided with a plurality of tire bolt mounting holes evenly distributed along the circumference, and a plurality of weight-reducing notches are provided on the circumferential surface of the rim connecting flange.

[0018] Preferably, the brake disc comprises two ring bodies arranged opposite to each other, the two ring bodies are fixedly connected via a plurality of spaced connecting ribs, and the inner surfaces of the two ring bodies and the space between two adjacent connecting ribs form a ventilation passage.

[0019] Preferably, the connecting ribs include a first connecting rib, a second connecting rib, a third connecting rib and a fourth connecting rib which are arranged in sequence from the inside to the outside, a plurality of the first connecting ribs are arrayed around the central circumference of the brake disc, every two of the second connecting ribs form a group, each group of the second connecting ribs is located in the interval between two adjacent first connecting ribs, a plurality of the third connecting ribs are arrayed around the central circumference of the brake disc, and a plurality of the fourth connecting ribs are arrayed around the central circumference of the brake disc.

[0020] Preferably, the rim connecting flange, the flange end cover and the disc body connecting portion are integrally arranged.

[0021] A wheel end assembly is characterized by comprising a rim and the brake disc hub assembly, wherein the rim and the rim connecting flange are fixedly connected by tire bolts and nuts.

[0022] After adopting the above technical solution, the beneficial effects of the utility model are:

[0023] The brake disc hub assembly of the utility model comprises a brake disc and a split hub assembly. The brake disc is cast from ductile iron, so it has high wear resistance, good strength and rigidity. The split hub assembly is cast from aluminum alloy, which is light and has good heat capacity and good thermal conductivity. Therefore, the split hub assembly cast from aluminum alloy is light in weight and has good heat dissipation.

[0024] Since the connection end of the connection column claw is located between the connection column claw limiting convex ring and the connection column claw limiting groove, the connection column claw is fixedly connected to the brake disc by the second bolt. That is, the connection column claw does not contact the inner brake surface and the outer brake surface, and the heat at the inner and outer brake surfaces is partially blocked by the concave connection ring body. The setting of the connection column claw limiting groove slows down the speed of heat transfer at the inner and outer brake surfaces, thereby reducing and delaying the transfer of heat to the second bolt and the connection (i.e., the connection between the connection column claw and the connection column claw limiting groove), greatly reducing the temperature of the connection between the brake disc and the connection ring body after braking. Therefore, the performance degradation of the connection between the brake disc and the connection ring body and the second bolt is avoided, and the connection reliability is improved.

[0025] The disk body connecting part is provided with a plurality of connecting column claws evenly distributed around the circumference of the center line of the wheel disk connecting body, and there is a weight-reducing hole between two adjacent connecting column claws. The connecting column claws ensure the strength of the connecting structure, and the design of the weight-reducing hole can greatly reduce the weight on the one hand, and increase the ventilation area and accelerate the heat dissipation on the other hand.

[0026] Compared with the above-mentioned traditional brake disc, the brake disc of the utility model eliminates the connecting cylinder (or neck) of the brake disc, which greatly reduces the weight of the brake disc and ensures dynamic balance, greatly reduces the weight of the wheel end assembly, and meets the potential demand for lightweight vehicles. At the same time, the split hub assembly can replace the bearing mounting cylinder or the wheel disc connector separately. Compared with the traditional integral hub that needs to be replaced as a whole when damaged, the split hub assembly of the utility model can save maintenance costs.

[0027] In summary, the brake disc hub assembly of the utility model reduces the installation size of the brake disc hub assembly, thereby saving the installation space of the wheel end assembly, and the brake disc hub assembly not only has the advantages of high wear resistance and good structural strength, but also has the advantages of light overall weight and good heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a three-dimensional schematic diagram of the brake disc hub assembly of the utility model;

[0029] Figure 2 yes Figure 1 A-direction view of the middle brake disc hub assembly;

[0030] Figure 3 yes Figure 2 Schematic cross-sectional view at CC in the middle;

[0031] Figure 4 yes Figure 1 Schematic diagram of the structure of the middle brake disc;

[0032] Figure 5 It is a schematic diagram of the exploded structure of the brake disc hub assembly of the utility model;

[0033] Figure 6 It is a cross-sectional schematic diagram of the brake disc;

[0034] Figure 7 It is a schematic diagram of the wheel end assembly of the utility model;

[0035] In the figure: 1. Split hub assembly; 100. Wheel disc connector; 101. Rim connecting flange; 1011. Rim support platform; 102. Flange end cover; 1021. Flange portion; 1022. End cover portion; 10211. First mounting hole; 103. Disc body connecting portion; 1031. Connecting column claw; 10311. Fourth mounting hole; 10312. Positioning arc surface; 1032. Weight reduction hole; 104. Tire bolt mounting hole; 105. Weight reduction notch; 106. Bearing mounting cylinder; 1061. Bearing mounting hole; 1062. Lubrication cavity; 1063, second mounting hole; 1064, arc-shaped weight-reducing groove; 2, brake disc; 200, connecting ring body; 200a, inner ring body; 200b, outer ring body; 201, inner brake surface; 202, outer brake surface; 203, connecting column claw limiting groove; 2031, third mounting hole; 204, connecting column claw limiting convex ring; 207, first connecting rib; 208, second connecting rib; 209, third connecting rib; 2010, fourth connecting rib; 3, second bolt; S, labyrinth ventilation path; 4, rim; 6, first bolt; 7, tire bolt. DETAILED DESCRIPTION

[0036] The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings and specific embodiments to further understand the purpose, solution and effect of the utility model, but it is not intended to limit the scope of protection of the claims attached to the utility model.

[0037] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0038] In addition, although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0039] The embodiment of the utility model discloses a brake disc hub assembly, comprising a brake disc 2 and a split hub assembly 1, wherein the split hub assembly 1 comprises a wheel disc connector 100 and a bearing mounting cylinder 106, wherein the wheel disc connector 100 is fixedly connected to the bearing mounting cylinder 106 by a first bolt 6, and the wheel disc connector 100 comprises a rim connecting flange 101, a flange end cover 102 and a disc body connecting portion 103 which are sequentially distributed from the outer end to the inner end.

[0040] The disk body connection part 103 is provided with a plurality of connection column claws 1031 evenly distributed around the center line circumference of the wheel disk connection body 100, and there is a weight-reducing hole 1032 between two adjacent connection column claws 1031. The connection column claws 1031 ensure the strength of the connection structure, and the design of the weight-reducing hole 1032 can greatly reduce the weight on the one hand, and increase the ventilation area on the other hand to accelerate heat dissipation. Generally, the bearing mounting cylinder 106 and the wheel disk connection body 100 will not be damaged at the same time. Since the split wheel hub assembly 1 has its wheel disk connection body 100 and the bearing mounting cylinder 106 fixedly connected by the first bolt 6, the bearing mounting cylinder 106 or the wheel disk connection body 100 can be replaced separately. Compared with the traditional integral wheel hub that needs to be replaced as a whole when damaged, the split wheel hub assembly 1 of the utility model can save maintenance costs.

[0041] The brake disc 2 comprises a brake ring body, which is provided with an inner brake surface 201 and an outer brake surface 202.

[0042] In the radial direction, a concave connecting ring body 200 is provided inside the brake ring body, a connecting column claw limiting convex ring 204 and a plurality of connecting column claw limiting grooves 203 are provided on the side of the connecting ring body 200 close to the wheel disc connecting body 100, a connecting end of the connecting column claw 1031 is located between the connecting column claw limiting convex ring 204 and the connecting column claw limiting groove 203, and the connecting column claw 1031 is fixedly connected to the brake disc 2 by the second bolt 3. That is, the brake disc 2 is fixedly connected to the wheel disc connecting body 100 by the plurality of second bolts 3.

[0043] The utility model preferably casts the wheel disc connector 100 and the bearing mounting cylinder 106 with aluminum alloy. The aluminum alloy is light and has good heat capacity and good thermal conductivity. Therefore, the wheel disc connector 100 and the bearing mounting cylinder 106 cast with aluminum alloy are light in weight and have good heat dissipation. The brake disc 2 is preferably cast with ductile iron. Therefore, the brake disc 2 has high wear resistance and good strength and rigidity. Therefore, the brake disc hub assembly of the utility model not only has the advantages of high wear resistance and good structural strength, but also has the advantages of overall light weight and good heat dissipation.

[0044] After the traditional brake disc is braked, the temperature of the brake surface of the brake disc rises rapidly. As the heat is transferred, the connection with the brake surface is prone to performance degradation due to excessive temperature, resulting in unreliable connection. Figure 1 and Figure 3 As shown, since the connection end of the connection column claw 1031 is located between the connection column claw limiting convex ring 204 and the connection column claw limiting groove 203, the connection column claw 1031 is fixedly connected to the brake disc 2 through the second bolt 3. That is, the connection column claw 1031 does not contact the inner brake surface 201 and the outer brake surface 202, and the heat at the inner and outer brake surfaces is partially blocked by the concave connection ring body 200. The setting of the connection column claw limiting groove 203 slows down the speed of heat transfer at the inner and outer brake surfaces, thereby reducing and delaying the heat transfer to the second bolt 3 and the connection (i.e., the connection between the connection column claw 1031 and the connection column claw limiting groove 203), greatly reducing the temperature of the connection between the brake disc 2 and the connection ring body 200 after braking. Therefore, the performance degradation of the connection between the brake disc 2 and the connection ring body 200 and the second bolt 3 is avoided, and the connection reliability is improved.

[0045] On the one hand, the setting of the connection column claw limiting convex ring 204 further delays the transfer of heat from the brake surface to the second bolt 3 and the connection, reduces the temperature of the connection between the brake disc 2 and the connection ring body 200 after braking, avoids the performance degradation of the connection between the brake disc 2 and the connection ring body 200 and the second bolt 3, and improves the connection reliability. On the other hand, when the brake disc hub assembly is installed on the vehicle, the brake disc hub assembly will bear the gravity of the vehicle and the support force of the ground on the brake disc hub assembly, both of which are radial forces. When walking, the active disc assembly will be subjected to torsional torque, so the second bolt 3 at the connection between the connection column claw 1031 and the brake disc 2 will be subjected to shear force. The groove wall of the connection column claw limiting groove 203 and the setting of the connection column claw limiting convex ring 204 can share the shear force on the second bolt 3, avoid the second bolt 3 from being sheared, and then prevent the brake disc 2 from being dislocated and disengaged from the split hub assembly 1, improve the strength and overall stability of the connection, reduce the deformation under high torsional torque, and thus improve the reliability of the connection.

[0046] The flange end cover 102 includes an integrally arranged flange portion 1021 and an end cover portion 1022. In the radial direction, the flange portion 1021 is located outside the end cover portion 1022. The flange portion 1021 is provided with a plurality of first mounting holes 10211 for mounting first bolts evenly distributed along the circumference.

[0047] A plurality of second mounting holes 1063 are provided on the end surface where the bearing mounting cylinder 106 is connected to the flange end cover 102 . The second mounting holes 1063 are arranged in a one-to-one correspondence with the first mounting holes 10211 .

[0048] A plurality of second mounting holes 1063 are provided on the end surface where the bearing mounting cylinder 106 is connected to the flange end cover 102 . The second mounting holes 1063 are arranged in a one-to-one correspondence with the first mounting holes 10211 .

[0049] The bearing mounting cylinder 106 is provided with a bearing mounting hole 1061 for mounting the bearing and a lubrication cavity 1062 for accommodating the lubricating medium. The distance between the two bearing mounting holes 106 is greatly shortened. The distance between the two bearings of the conventional method is 55 mm, while the distance between the two bearings of the present invention is shortened to 34 mm. The size of the bearing mounting cylinder 106 is reduced, saving installation space.

[0050] The inner side of each connecting column claw 1031 is provided with a positioning arc surface 10312 adapted to the outer peripheral surface of the connecting column claw limiting convex ring 204 .

[0051] The brake disc 2 is provided with a plurality of third mounting holes 2031 for installing the second bolts 3. The plurality of third mounting holes 2031 are arranged in a circular array around the central axis of the brake disc 2. The third mounting holes 2031 are located in the connecting column claw limiting groove 203. The connecting column claw 1031 is provided with a fourth mounting hole 10311. The fourth mounting hole 10311 is arranged in a one-to-one correspondence with the third mounting holes 2031.

[0052] The rim connection flange 101 is provided with a plurality of tire bolt mounting holes 104 evenly distributed along the circumference, and a plurality of weight-reducing notches 105 are provided on the circumferential surface of the rim connection flange 101. A plurality of arc-shaped weight-reducing grooves 1064 are provided on one end of the bearing mounting cylinder 106 close to the wheel disc connection body 100. The design of the arc-shaped weight-reducing grooves 1064 and the weight-reducing notches 105 can reduce the weight of the split wheel hub assembly 1.

[0053] The brake disc 2 includes two relatively arranged ring bodies, namely an inner ring body 200a and an outer ring body 200b. The inner ring body 200a and the outer ring body 200b are fixedly connected by a plurality of spaced connecting ribs. The inner surfaces of the two ring bodies and the intervals between two adjacent connecting ribs form a ventilation duct.

[0054] The connecting ribs are designed into four types, such as Figure 6 As shown, the connecting ribs include a first connecting rib 207, a second connecting rib 208, a third connecting rib 209 and a fourth connecting rib 2010 which are sequentially arranged from the inside to the outside. A plurality of first connecting ribs 207 are arranged around the central circumference of the brake disc 2, and every two second connecting ribs 208 form a group. Each group of second connecting ribs 208 is located in the interval between two adjacent first connecting ribs 207. A plurality of third connecting ribs 209 are arranged around the central circumference of the brake disc 2, and a plurality of fourth connecting ribs 2010 are arranged around the central circumference of the brake disc 2. One end of the third connecting rib 209 extends to the interval between two adjacent second connecting ribs 208 and the interval between the adjacent first connecting rib 207 and the second connecting rib 208, and the other end of the third connecting rib 209 extends to the interval between two adjacent fourth connecting ribs 2010. In this layout, as many connecting ribs as possible are arranged to enhance the connection reliability and the strength of the brake disc 2, so as to prevent the brake disc 2 from being deformed or cracked due to the clamping force of the brake caliper during braking. In addition, the number of air ducts between the connecting ribs increases, and the flowing air is made to follow a maze-like ventilation path S, thereby taking away more heat and optimizing the heat dissipation performance of the brake disc.

[0055] In some embodiments, the rim connection flange 101, the flange end cover 102 and the disk body connection portion 103 are integrally arranged, which can omit the step of separately installing the end cover, and there is no need to purchase an additional end cover, thereby saving assembly time and cost. Preferably, the flange end cover 102 includes an integrally arranged flange portion 1021 and an end cover portion 1022, and the flange portion 1021 is located on the outside of the end cover portion 1022 in the radial direction.

[0056] In some embodiments, Figure 7 As shown, a wheel end assembly includes a rim 4 and a brake disc hub assembly, wherein the rim 4 is fixedly connected to the rim connection flange 101 by tire bolts 7 and nuts. A plurality of rim support platforms 1011 are fixed on the end surface of the rim connection flange 101, and the plurality of rim support platforms 1011 are evenly distributed in a circle around the center line of the wheel disc connector. The outer side surface of the rim support platform 1011 is an arc surface, and the arc surfaces of the plurality of rim support platforms 1011 are coplanar. The rim is usually provided with a central mounting positioning hole. When the rim 4 is fixedly mounted to the brake disc hub assembly, the arc surface of the rim support platform 1011 fits with the hole wall of the central mounting positioning hole of the rim 4, and the plurality of rim support platforms 1011 of the brake disc hub assembly support the rim.

[0057] The traditional brake disc and wheel hub take up a lot of space when assembled on the wheel end (refer to the Chinese utility patent application number 201920344846.5, the publication number is CN209616792U, and the name is a new type of automobile disc rear axle assembly with a load capacity of 5.5 tons. The patent specification is attached Figure 1 and Figure 2 The brake disc in the figure includes a disc body, a connecting cylinder and a flange part from the right side to the left side. After the brake disc is assembled with the wheel hub, it is obvious that the axial dimension is relatively large).

[0058] Compared with the above-mentioned traditional brake disc, the brake disc of the utility model eliminates the connecting cylinder (or neck) of the brake disc, which greatly reduces the weight of the brake disc and ensures dynamic balance, greatly reduces the weight of the wheel end assembly, and meets the potential demand for lightweight vehicles. At the same time, the split hub assembly can replace the bearing mounting cylinder or the wheel disc connector separately. Compared with the traditional integral hub that needs to be replaced as a whole when damaged, the split hub assembly of the utility model can save maintenance costs.

[0059] When the brake disc hub assembly and the wheel end assembly thereof of the utility model are installed on a vehicle, not only the weight of the vehicle can be greatly reduced, but also the occupied space can be saved.

[0060] The technical solution of the utility model is described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above embodiments. Those skilled in the art should understand that various changes made thereto in form and details fall within the protection scope defined by the claims of the utility model.

Claims

1. A brake disc hub assembly, comprising a brake disc and a split hub assembly, characterized in that: The split wheel hub assembly comprises a wheel disc connector and a bearing mounting cylinder, wherein the wheel disc connector and the bearing mounting cylinder are fixedly connected by a first bolt. The wheel disc connector includes a rim connecting flange, a flange end cover and a disc body connecting portion which are sequentially distributed from the outer end to the inner end. The disc body connection part is provided with a plurality of connection column claws evenly distributed around the center line circumference of the wheel disc connection body, and a weight reduction hole is provided between two adjacent connection column claws. The brake disc comprises a brake ring body, wherein the brake ring body is provided with an inner brake surface and an outer brake surface. In the radial direction, an inwardly concave connecting ring body is provided on the inner side of the brake ring body, and a connecting column claw limiting convex ring and a plurality of connecting column claw limiting grooves are provided on the side of the connecting ring body close to the wheel disc connector, the connecting end of the connecting column claw is located between the connecting column claw limiting convex ring and the connecting column claw limiting groove, and the connecting column claw is fixedly connected to the brake disc by a second bolt.

2. The brake disc hub assembly according to claim 1, characterized in that: The flange end cover comprises an integrally arranged flange portion and an end cover portion, wherein the flange portion is located on the outer side of the end cover portion in the radial direction, and the flange portion is provided with a plurality of first mounting holes evenly distributed along the circumference for mounting the first bolts. A plurality of second mounting holes are formed on the end surface of the bearing mounting cylinder body connected to the flange end cover, and the second mounting holes are arranged in a one-to-one correspondence with the first mounting holes.

3. The brake disc hub assembly according to claim 1, characterized in that The bearing installation cylinder is provided with a bearing installation hole for installing the bearing and a lubrication cavity for accommodating the lubrication medium.

4. The brake disc hub assembly according to claim 3, characterized in that: The inner side of each connecting column claw is provided with a positioning arc surface matched with the outer peripheral surface of the connecting column claw limiting convex ring.

5. The brake disc hub assembly according to claim 1, characterized in that: The brake disc is provided with a plurality of third mounting holes for installing the second bolts, and the plurality of third mounting holes are arranged in a circular array around the central axis of the brake disc, and the third mounting holes are located in the limiting groove of the connecting column claw, and the connecting column claw is provided with a fourth mounting hole, and the fourth mounting hole is arranged in a one-to-one correspondence with the third mounting holes.

6. The brake disc hub assembly according to claim 1, characterized in that: The rim connecting flange is provided with a plurality of tire bolt mounting holes evenly distributed along the circumference, and a plurality of weight-reducing notches are provided on the circumferential surface of the rim connecting flange.

7. The brake disc hub assembly according to claim 1, characterized in that: The brake disc comprises two ring bodies arranged opposite to each other, the two ring bodies are fixedly connected by a plurality of spaced connecting ribs, and the inner surfaces of the two ring bodies and the space between two adjacent connecting ribs form a ventilation channel.

8. The brake disc hub assembly according to claim 7, characterized in that: The connecting ribs include a first connecting rib, a second connecting rib, a third connecting rib and a fourth connecting rib which are arranged in sequence from the inside to the outside. A plurality of the first connecting ribs are arrayed around the central circumference of the brake disc, and every two of the second connecting ribs form a group. Each group of the second connecting ribs is located in the interval between two adjacent first connecting ribs. A plurality of the third connecting ribs are arrayed around the central circumference of the brake disc, and a plurality of the fourth connecting ribs are arrayed around the central circumference of the brake disc.

9. The brake disc hub assembly according to claim 1, characterized in that: The rim connecting flange, the flange end cover and the disc body connecting portion are integrally arranged.

10. A wheel end assembly, characterized in that: The invention comprises a wheel rim and the brake disc hub assembly as claimed in claim 1, wherein the wheel rim and the wheel rim connecting flange are fixedly connected by tire bolts and nuts.

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