Wheel end assembly with venting structure and axle

Abstract

The utility model discloses a wheel end assembly and axle with ventilation structure, wheel end assembly with ventilation structure includes axle, wheel hub, rotor, wheel hub is encased in the outside of axle, and the outer edge surface of wheel hub is provided with the annular connecting portion that projects outward along the radial of axle, and rotor includes connecting section, brake disc, connecting ring, and the inner edge of brake disc is connected to the outer edge surface of connecting section, and connecting ring is butt -jointed with annular connecting portion and fixedly cooperated, and the face between connecting ring and annular connecting portion mutually butt -jointed forms ventilation gap, and the outer edge of annular connecting portion is provided with first recess, and the inner edge of connecting ring is provided with second recess, and first recess is communicated with the outer edge of ventilation gap, and second recess is communicated with the inner edge of ventilation gap, to make first recess, ventilation gap and second recess jointly constitute a heat dissipation channel. The utility model accelerates the air exchange between inside wheel end assembly and outside environment to cool brake disc, thereby effectively reducing the temperature rise of brake disc.

Description

Technical Field

[0001] This utility model relates to the field of commercial vehicle technology, specifically to a wheel end assembly and axle with a ventilation structure. Background Technology

[0002] Commercial vehicle axles are typically equipped with wheel-end assemblies, which include brake discs, wheel hubs, and axles. The wheel hubs are pivotally connected to the axle head at the end of the axle via bearings, and the brake discs are fitted onto the axle and connected to the inside of the wheel hub. In existing wheel-end assemblies, the brake discs are designed with air ducts. As the brake discs rotate with the wheel hub, air flows within the air ducts to dissipate heat from the brake discs. While this can control the temperature rise of the brake discs to some extent, when the vehicle is driving in more complex road conditions, the operating frequency and duration of the braking system are uncontrollable. For example, on some long downhill sections, the brake discs and brake calipers are in contact and rub against each other for extended periods. Relying solely on the cooling ducts on the brake discs for heat dissipation is insufficient to maintain the brake disc temperature at a relatively low level. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to propose a wheel end assembly with a ventilation structure, which can control the flow between the inside of the wheel end assembly and the external environment, so as to reduce the temperature rise of the brake disc.

[0004] The second objective of this utility model is to provide a vehicle axle.

[0005] To achieve the first objective mentioned above, this utility model adopts the following technical solution:

[0006] Wheel-end assemblies with ventilated structures include axles, hubs, and rotors;

[0007] The hub is fitted onto the outside of the axle, and a bearing is provided between the hub and the axle. The outer edge of the hub is provided with an annular connecting part that protrudes outward along the radial direction of the axle.

[0008] The rotor includes a cylindrical connecting section, a brake disc located at one end of the connecting section, and a connecting ring extending radially inward from the other end of the connecting section along the axle. The inner edge of the brake disc is connected to the outer edge surface of the connecting section.

[0009] The connecting ring and the annular connecting part are mated and fixedly fitted together. A ventilation gap is formed between the mating surfaces of the connecting ring and the annular connecting part. The outer edge of the annular connecting part is provided with a first recessed position that is recessed towards the axle, and the inner edge of the connecting ring is provided with a second recessed position that is recessed away from the axle. The first recessed position is connected to the outer edge of the ventilation gap, and the second recessed position is connected to the inner edge of the ventilation gap, so that the first recessed position, the ventilation gap, and the second recessed position together form a heat dissipation channel.

[0010] The annular connecting part has multiple first recesses, and the portion of the annular connecting part between two adjacent first recesses forms a first connecting part. The first connecting part has a first bolt hole. The connecting ring has multiple second recesses, and the portion of the connecting ring between two adjacent second recesses forms a second connecting part. The second connecting part has a second bolt hole, and the second bolt hole is aligned with the first bolt hole along the circumference of the axle. A connecting bolt that fixes the annular connecting part and the connecting ring together is inserted into both of them.

[0011] The connecting ring includes a first side near the annular connecting portion, the annular connecting portion includes a second side opposite to the first side, and the ventilation gap is located between the first side and the second side;

[0012] A supporting boss is provided on the first side, and the supporting boss abuts against the second side; or

[0013] A support boss is provided on the second side, and the support boss abuts against the first side.

[0014] The annular connecting part is located inside the connecting ring, the inner diameter of the connecting ring is R1, and the maximum outer diameter of the part on the hub located outside the annular connecting part is R2, where R1 > R2.

[0015] It also includes a connecting flange, which is fitted onto the hub and mated to the inner side of the connecting ring. Connecting bolts pass through the connecting flange, the connecting ring, and the annular connecting part from the inside out to fix the connecting flange, the connecting ring, and the annular connecting part together. The outer edge of the connecting flange is provided with locking bolts to fix the connecting flange to the rim of the tire.

[0016] The inner edge of the connecting flange is provided with multiple third recesses that are radially recessed outward along the axle. Each of the multiple third recesses corresponds to a multiple of the second recesses, and the corresponding third recesses and second recesses are aligned.

[0017] The brake disc includes a first disc body and a second disc body arranged opposite to each other, with a heat dissipation gap formed between the first disc body and the second disc body. Multiple connecting ribs connecting the first disc body and the second disc body are provided in the heat dissipation gap. The first disc body is connected to the outer edge surface of the connecting section through a connecting part, and multiple ventilation holes are provided on the connecting part arranged around the connecting section. An annular groove is formed between the inner edge of the second disc body and the outer edge surface of the connecting section.

[0018] To achieve the second objective mentioned above, this utility model adopts the following technical solution:

[0019] The axle includes the aforementioned wheel end assembly with a ventilated structure.

[0020] The beneficial effects of this utility model are as follows:

[0021] In this invention, the wheel hub and the rotor are connected together by a mating annular connecting part and a connecting ring. At the position where the annular connecting part and the connecting ring mate, a heat dissipation channel is formed. This heat dissipation channel connects the interior of the rotor with the external environment. When the wheel hub drives the rotor to rotate, air can flow through the heat dissipation channel, accelerating the air exchange between the inside of the wheel end assembly and the external environment, thereby cooling the brake disc and effectively reducing the temperature rise of the brake disc, thus improving the braking safety of the vehicle. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a cross-sectional view of the present invention;

[0024] Figure 3 for Figure 2 Enlarged view at point A in the middle;

[0025] Figure 4 for Figure 1 Schematic diagram of the middle hub;

[0026] Figure 5 for Figure 1 Schematic diagram of the middle rotor;

[0027] Figure 6 for Figure 1 A schematic diagram of the connecting flange. Detailed Implementation

[0028] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments:

[0029] like Figure 1 , 2As shown in Figures 3, 4, 5, and 6, this utility model discloses a wheel end assembly with a ventilation structure, comprising an axle 10, a wheel hub 20, and a rotor 30. The wheel hub 20 is generally cylindrical and is fitted onto the outside of the axle 10. Two bearings 21 are provided between the wheel hub 20 and the axle 10, pivotally connecting the wheel hub 20 to the axle 10 so that the wheel hub 20 can rotate relative to the axle 10. An annular connecting portion 22 protruding radially outward along the axle 10 is provided on the outer edge surface of the wheel hub 20. The rotor 30 includes a cylindrical connecting section 31, a brake disc 32 located at one end of the connecting section 31, and a connecting ring 33 extending radially inward along the axle 10 from the other end of the connecting section 31. The inner edge of the brake disc 32 is connected to the outer edge surface of the connecting section 31 and is used to cooperate with the vehicle's brake caliper to form braking force. The connecting ring 33 and the annular connecting part 22 are arranged along the axis of the axle 10 and are close to each other. They are fixedly engaged so that the rotor 30 can rotate with the hub 20. The connecting ring 33 is located inside the annular connecting part 22, and a ventilation gap 220 is formed between the mating surfaces of the two. The outer edge of the annular connecting part 22 is provided with a plurality of first recesses 221 that are recessed towards the axle 10. The plurality of first recesses 221 are arranged circumferentially along the annular connecting part 22. The inner edge of the connecting ring 33 is provided with a plurality of second recesses 331 that are recessed away from the axle 10. The first recesses 221 are connected to the outer edge of the ventilation gap 220, and the second recesses 331 are connected to the inner edge of the ventilation gap 220. Thus, the first recesses 221, the ventilation gap 220, and the second recesses 331 together form a heat dissipation channel.

[0030] In this invention, the wheel hub 20 and the rotor 30 are connected together by a mating annular connecting part 22 and a connecting ring 33. A heat dissipation channel is formed at the position where the annular connecting part 22 and the connecting ring 33 mate. This heat dissipation channel connects the interior of the rotor 30 with the external environment. When the wheel hub 20 drives the rotor 30 to rotate, air can flow through the heat dissipation channel, accelerating the air exchange between the interior of the wheel end assembly and the external environment, thereby cooling the brake disc 32 and effectively reducing the temperature rise of the brake disc 32, thus improving the braking safety of the vehicle.

[0031] The portion of the annular connecting part 22 located between two adjacent first recesses 221 forms a first connecting part 225, and the first connecting part 225 is provided with a first bolt hole 223; the portion of the connecting ring 33 located between two adjacent second recesses 331 forms a second connecting part 333, and the second connecting part 333 is provided with a second bolt hole 334. A plurality of first bolt holes 223 and a plurality of second bolt holes 334 correspond to each other along the circumference of the axle 10, and the corresponding first bolt holes 223 and second bolt holes 334 are aligned along the circumference of the axle 10. The annular connecting part 22 and the connecting ring 33 are fixed together by using a connecting bolt 50 passing through the second bolt hole 334 and the first bolt hole 223; the connecting bolt 50 can be passed through the second bolt hole 334 and the first bolt hole 223 from the outside to the inside, thereby facilitating the installation of the wheel end assembly. The connecting ring 33 includes a first side surface 332 located inside and near the annular connecting portion 21. The annular connecting portion 22 includes a second side surface 224 located outside and opposite to the first side surface 332. A ventilation gap 220 is located between the first side surface 332 and the second side surface 224. Since the connecting ring 33 and the annular connecting portion 22 are locked by connecting bolts 50, a support boss 222 protruding towards the connecting ring 33 is provided on the second side surface 224. After the connecting ring 33 and the annular connecting portion 22 are locked with the connecting bolts 50, the support boss 222 abuts against the first side surface 332, and a ventilation gap 220 is formed between the portion of the second side surface 224 without the support boss 222 and the first side surface 332. Specifically, the support boss 222 can be provided on the first connecting portion 225, which is equivalent to increasing the thickness of the first connecting portion 225, thereby giving the first bolt hole 223 on the first connecting portion 225 a relatively large length dimension, so as to increase the firmness of the connection between the connecting ring 33 and the annular connecting portion 222.

[0032] In other embodiments, the support boss 222 may be disposed on the first side surface 332, and the connecting ring 33 and the annular connecting part 22 may be locked by the connecting bolt 50, so that the support boss 222 abuts against the second side surface 224.

[0033] In this invention, the annular connecting part 22 is disposed inside the connecting ring 33, the inner diameter of the connecting ring 33 is R1, the hub 20 is configured as a cylindrical structure, and the maximum outer diameter of the part located outside the annular connecting part 22 is R2, where R1 is greater than R2. Thus, when the brake disc 32 needs maintenance, the connecting bolt 50 can be removed, and the rotor 30 can be disassembled from the hub 20 outwards. That is, the rotor 30 can be disassembled separately without disassembling the hub 20.

[0034] The wheel end assembly of this utility model also includes a connecting flange 40, which is sleeved on the outside of the wheel hub 20 and abuts against the inner side of the connecting ring 33. Connecting bolts 50 pass through the connecting flange 40, the connecting ring 33, and the annular connecting portion 22 sequentially from the inside out, connecting the connecting flange 40, the connecting ring 33, and the annular connecting portion 22. Specifically, a third bolt hole 42 is provided on the connecting flange 33 for the connecting bolts 50 to pass through. A locking bolt 60 is provided on the outer edge of the connecting flange 40 to fix the connecting flange 40 to the rim of the tire. A plurality of third recesses 42 are provided on the inner edge of the connecting flange 40, recessed radially outward along the axle 10. Each of the third recesses 42 corresponds one-to-one with a plurality of second recesses 331, and the corresponding third recesses are aligned with the second recesses 331. Thus, the third recesses 42 connect to the outer end of the heat dissipation channel, allowing the heat dissipation channel to communicate with the external environment, thereby preventing the connecting flange 40 from obstructing the airflow within the heat dissipation channel.

[0035] The aforementioned brake disc 32 includes a first disc body 321 and a second disc body 322. The first disc body 321 and the second disc body 322 are arranged opposite to each other and form an air guide gap between them. Multiple connecting ribs 323 are provided in the air guide gap to connect the first disc body 321 and the second disc body 322 together. The first disc body 321 is connected to the outer edge surface of the connecting section 31 through a connecting part 324. Multiple ventilation holes 325 are provided on the connecting part 324 and arranged around the connecting section 31. An annular groove 326 is formed between the inner edge of the second disc body 322 and the outer edge surface of the connecting section 31. Through the air guide gap, ventilation holes 325 and annular groove 326, multiple channels for air flow are formed inside the brake disc 32, accelerating the heat dissipation of the brake disc 32.

[0036] In other embodiments of this utility model, the connecting ring 33 may be disposed on the inner side of the annular connecting portion 22.

[0037] The axle of this utility model includes the wheel end assembly with ventilation structure described above. The other structures of the axle are the same as those in the prior art and will not be described in detail here.

[0038] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A wheel end assembly with a ventilation structure, characterized in that, Including axles, hubs, and rotors; The hub is fitted onto the outside of the axle, and a bearing is provided between the hub and the axle. The outer edge of the hub is provided with an annular connecting part that protrudes outward along the radial direction of the axle. The rotor includes a cylindrical connecting section, a brake disc located at one end of the connecting section, and a connecting ring extending radially inward from the other end of the connecting section along the axle. The inner edge of the brake disc is connected to the outer edge surface of the connecting section. The connecting ring and the annular connecting part are mated and fixedly fitted together. A ventilation gap is formed between the mating surfaces of the connecting ring and the annular connecting part. The outer edge of the annular connecting part is provided with a first recessed position that is recessed towards the axle, and the inner edge of the connecting ring is provided with a second recessed position that is recessed away from the axle. The first recessed position is connected to the outer edge of the ventilation gap, and the second recessed position is connected to the inner edge of the ventilation gap, so that the first recessed position, the ventilation gap, and the second recessed position together form a heat dissipation channel.

2. The wheel end assembly with a ventilation structure as described in claim 1, characterized in that, The annular connecting part has multiple first recesses, and the portion of the annular connecting part between two adjacent first recesses forms a first connecting part. The first connecting part has a first bolt hole. The connecting ring has multiple second recesses, and the portion of the connecting ring between two adjacent second recesses forms a second connecting part. The second connecting part has a second bolt hole, and the second bolt hole is aligned with the first bolt hole along the circumference of the axle. A connecting bolt that fixes the annular connecting part and the connecting ring together is inserted into both of them.

3. The wheel end assembly with a ventilation structure as described in claim 2, characterized in that, The connecting ring includes a first side near the annular connecting portion, the annular connecting portion includes a second side opposite to the first side, and the ventilation gap is located between the first side and the second side; A supporting boss is provided on the first side, and the supporting boss abuts against the second side; or A support boss is provided on the second side, and the support boss abuts against the first side.

4. The wheel end assembly with a ventilation structure as described in claim 3, characterized in that, The annular connecting part is located inside the connecting ring, the inner diameter of the connecting ring is R1, and the maximum outer diameter of the part on the hub located outside the annular connecting part is R2, where R1 > R2.

5. The wheel end assembly with a ventilation structure as described in claim 4, characterized in that, It also includes a connecting flange, which is fitted onto the hub and mated to the inner side of the connecting ring. Connecting bolts pass through the connecting flange, the connecting ring, and the annular connecting part from the inside out to fix the connecting flange, the connecting ring, and the annular connecting part together. The outer edge of the connecting flange is provided with locking bolts to fix the connecting flange to the rim of the tire.

6. The wheel end assembly with a ventilation structure as described in claim 5, characterized in that, The inner edge of the connecting flange is provided with multiple third recesses that are radially recessed outward along the axle. Each of the multiple third recesses corresponds to a multiple of the second recesses, and the corresponding third recesses and second recesses are aligned.

7. The wheel end assembly with a ventilation structure as described in claim 1, characterized in that, The brake disc includes a first disc body and a second disc body arranged opposite to each other, with a heat dissipation gap formed between the first disc body and the second disc body. Multiple connecting ribs connecting the first disc body and the second disc body are provided in the heat dissipation gap. The first disc body is connected to the outer edge surface of the connecting section through a connecting part, and multiple ventilation holes are provided on the connecting part arranged around the connecting section. An annular groove is formed between the inner edge of the second disc body and the outer edge surface of the connecting section.

8. An axle, characterized in that, Includes the wheel end assembly with ventilation structure as described in any one of claims 1-7.

Images