Short-span hub and vehicle

Abstract

According to the short-span hub and the vehicle, an outer bearing chamber and an inner bearing chamber are arranged in a shell sleeve of a hub body in the axial direction, and an outer bearing and an inner bearing are arranged in the outer bearing chamber and the inner bearing chamber respectively; the inner end and the outer end of the spacer bush are respectively in contact with the inner end of the outer bearing and the outer end of the inner bearing so as to respectively limit the axial strokes of the outer bearing and the inner bearing. The pair of bearings are arranged in the shell sleeve, so that the span length is reduced, the bearing unit hub assembly can be matched with a short axle shell assembly and can also be matched with a whole axle which originally uses a bearing unit hub assembly, higher universality is achieved, and the weight of the whole axle is reduced.

Description

Technical Field

[0001] The utility model relates to the field of automobile mechanical parts, in particular to a short-span wheel hub for commercial vehicles and a vehicle. Background Art

[0002] The wheel hub assembly is an important component of the car; the wheel hub assembly is generally composed of the wheel hub body, a pair of bearings, seals, bolts and other parts. The wheel hub assemblies currently used in vehicles are mainly divided into two types according to the type of bearings: one is the bearing unit hub assembly, and the other is the ordinary bearing hub assembly. Among them, the bearing unit hub assembly includes a pair of bearings with the same inner and outer diameters that are assembled separately. However, due to the need to cooperate with the steering knuckle, the structure of the inner ring of the inner bearing is different from that of the outer one, so it needs to be paired in advance before assembly and use. In addition, the bearing unit hub can only use grease as the lubricating medium. If you want to replace it with lubricating oil, it will be difficult to achieve due to sealing difficulties.

[0003] In contrast, the inner and outer diameters of a pair of bearings in an ordinary wheel hub assembly are different. Generally, the outer diameter is smaller and the inner diameter is larger. The span between the bearings is larger (the span is usually more than 45 mm; it varies greatly depending on the load of the vehicle, with a maximum of 100-120 mm or more). For example, the wheel hub unit and its assembly and installation method disclosed in the CN108944260A patent publication document. Ordinary wheel hub assemblies can use grease or lubricating oil as a lubricating medium; although the performance of oil lubrication is better than grease lubrication, the whole bridge matched with the bearing unit wheel hub assembly has an advantage in weight, so the bearing unit wheel hub assembly has a certain market share.

[0004] The replacement cost of the bearing unit hub assembly is high, and the interchangeability between the ordinary hub assembly and the bearing unit hub assembly is poor. If the end user wants to replace a different type of hub assembly, the entire bridge needs to be replaced, which makes the maintenance time and cost unbearable. The span of a pair of bearings in an ordinary hub assembly is larger than that of a bearing unit hub assembly, resulting in a large deviation in clearance control, which greatly reduces the life of the hub assembly; the larger bearing span of an ordinary hub assembly requires a longer bridge housing assembly, which also increases weight and cost. In addition, compared with oil lubrication, grease lubrication has insufficient heat dissipation and bearing cleaning capabilities. Summary of the invention

[0005] The utility model aims to solve the existing problems and provide a short-span wheel hub and a vehicle.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model includes a hub body, the hub body includes a flange and a shell sleeve connected thereto, the interior of the shell sleeve is axially provided with an outer bearing chamber and an inner bearing chamber, the outer bearing chamber and the inner bearing chamber are respectively provided with an outer bearing and an inner bearing; it also includes a spacer sleeve, the spacer sleeve is in a straight cylindrical shape, the inner and outer ends of the spacer sleeve respectively contact the inner end of the outer bearing and the outer end of the inner bearing, so as to respectively limit the axial stroke of the two.

[0007] Among them, the inner end of the shell is provided with an oil seal which seals the inner end of the inner bearing.

[0008] Wherein, the inner ring of the oil seal is provided with an oil seal seat ring.

[0009] Wherein, the inner bearing and the outer bearing are of the same model.

[0010] The steering knuckle passes through the center hole of the wheel hub body and forms a rotation connection with the outer bearing and the inner bearing.

[0011] Wherein, an O-type sealing ring is arranged between the steering knuckle and the inner bearing and / or the oil seal seat ring.

[0012] The outer wall of the steering knuckle is provided with a structure adapted to the inner ring of the oil seal and cooperates with the oil seal.

[0013] Wherein, the outer end of the steering knuckle is provided with a shaft head nut and / or a gasket, and the shaft head nut and / or the gasket are located in the cavity inside the shell.

[0014] The utility model also provides a vehicle, comprising any one of the short-span wheel hubs.

[0015] Compared with the prior art, the utility model reduces the span length by arranging a pair of bearings inside the shell, and can match the wheel hub assembly with a short bridge shell, and can also match the whole bridge that originally uses the bearing unit wheel hub assembly, thereby achieving greater versatility and reducing the weight of the whole bridge; the spacer can ensure the clearance between the two bearings; by arranging the oil seal seat ring or the adaptive structure of the outer wall of the steering knuckle, the unification of bearing models is achieved, and the manufacturing cost and assembly difficulty are reduced; oil lubrication can be used, the heat dissipation is good, and the iron filings after the bearing is worn can be taken away, thereby improving the service life of the wheel hub assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0017] Figure 2 It is a schematic diagram of the assembly of an embodiment of the utility model;

[0018] See attached drawings: 1. wheel hub body; 2. outer bearing; 3. inner bearing; 4. oil seal; 5. O-ring; 6. oil seal seat; 7. spacer; 8. wheel bolt; 9. steering knuckle; 10. shaft head nut; 11. gasket. DETAILED DESCRIPTION

[0019] The utility model will now be further described with reference to the accompanying drawings.

[0020] See also Figure 1 and Figure 2 , Figure 1 and Figure 2 The embodiment of the utility model is a short span wheel hub. The embodiment mainly includes a wheel hub body, which includes a flange plate and a shell connected end to end, and a plurality of wheel bolts are arranged on the flange plate. A middle hole penetrating the flange plate and the shell plate is arranged in the center of the wheel hub body for the steering knuckle to penetrate.

[0021] The shell is provided with an outer bearing chamber and an inner bearing chamber, which are axially stepped in the shell and close to the inner side. The outer bearing chamber and the inner bearing chamber are provided with an outer bearing and an inner bearing respectively, and the outer rings of the outer bearing and the inner bearing form an interference fit with the inner wall of the center hole of the wheel hub body, and the inner rings of the two form a clearance fit with the outer wall of the steering knuckle.

[0022] Furthermore, all structures of the inner bearing and the outer bearing are the same and of the same model, and the two are arranged facing each other. The inner rings and outer rings of all inner and outer bearings can be mixed and used without being distinguished separately; in this embodiment, ordinary bearings of the same model are used, which has more procurement resources and low cost.

[0023] Since the position of the outer bearing is moved from near the flange to the inside of the shell, the span between the inner and outer bearings is smaller (the span is the distance between the two, preferably not more than 40mm). The inner diameter of the bearing is the same as the inner diameter of the bearing unit, and the width of the inner and outer bearings is the same as the width of the bearing assembly. When assembled on the whole bridge, the outer diameter of the shaft head at the matching point with the inner and outer bearings is the same, and a short bridge shell assembly can also be used to achieve interchangeability with the bearing unit hub assembly.

[0024] It also includes a spacer sleeve, which is in the shape of a straight cylinder. The inner and outer ends of the spacer sleeve contact the inner end of the outer bearing and the outer end of the inner bearing respectively to limit the axial travel of the two. The spacer sleeve can control the clearance of the bearing within a set range. When using the assembly, it only needs to be tightened according to a small tightening torque and no adjustment is required. Since the span between the inner and outer bearings is reduced in this embodiment, the length of the spacer sleeve is also greatly reduced accordingly; and since the diameters of the inner and outer bearings are the same, the spacer sleeve does not need to be manufactured into a stepped cylinder, so the structure is simplified and the cost is reduced.

[0025] Furthermore, the inner end of the shell is provided with an oil seal that seals the inner end of the inner bearing, and the inner ring of the oil seal is provided with a corresponding oil seal seat ring. An O-ring is preferably provided between the steering knuckle and the inner bearing and the oil seal seat ring to complete the seal with the outer wall of the steering knuckle.

[0026] Furthermore, the O-ring and the oil seal seat ring are not essential parts. That is, according to the structure of the entire axle head, a structure compatible with the inner ring of the oil seal can be directly provided on the outer wall of the steering knuckle axle head, and it can be matched with the oil seal of the wheel hub assembly. As an alternative, the O-ring and the oil seal seat ring do not need to be installed, thereby further simplifying the structure.

[0027] Further, see Figure 2 The outer end of the steering knuckle is provided with a shaft head nut and a gasket located in a cavity inside the shell. The cavity is located outside the outer bearing chamber and is connected thereto. Compared with the above arrangement of the shaft head nut extending out of the flange, the overall length is further reduced, which is convenient for assembly and general use.

[0028] See also Figure 2 In the present embodiment, during assembly, the hub body is processed with the inner and outer bearing chambers and the installation position of the oil seal. Then the outer rings of the inner and outer bearings are pressed into the center hole of the hub body. Then the inner rings of the inner and outer bearings and the spacer are placed in the corresponding positions according to the above structure. Then the oil seal is pressed into the oil seal position on the hub body.

[0029] When assembling the entire bridge, install the oil seal seat ring on the shaft head of the bridge, and then put the O-ring tightly against the oil seal seat ring on the shaft head. If the corresponding structure is directly processed on the shaft head body according to the size of the oil seal seat ring, the oil seal seat ring and O-ring can be omitted. Install the wheel hub assembly on the shaft head of the bridge housing, and tighten it with the locking nut according to the specified torque. After all parts are assembled, add a certain amount of lubricating oil to the filling hole of the wheel hub assembly to complete the assembly. The lubricating oil can take away the iron filings after the bearing is worn, ensuring a longer life of the assembly.

[0030] Furthermore, a vehicle is provided, wherein the wheel comprises any of the above-mentioned short-span wheel hubs. The scheme and effect thereof are the same as those of the above-mentioned embodiments, and thus will not be described in detail.

[0031] The above describes the implementation mode of the utility model in combination with the drawings and embodiments. The structure given in the embodiments does not constitute a limitation of the utility model. Those skilled in the art can make adjustments as needed. Various deformations or modifications within the scope of the attached claims are within the scope of protection.

Claims

1. A short span wheel hub, comprising a wheel hub body, wherein the wheel hub body comprises a flange and a shell connected thereto, characterized in that: An outer bearing chamber and an inner bearing chamber are arranged axially inside the shell, and an outer bearing and an inner bearing are arranged in the outer bearing chamber and the inner bearing chamber respectively; The utility model also comprises a spacer sleeve, which is in a straight cylindrical shape, and the inner and outer ends of the spacer sleeve respectively contact the inner end of the outer bearing and the outer end of the inner bearing to respectively limit the axial travel of the two.

2. The short span hub according to claim 1, characterized in that: The inner end of the shell is provided with an oil seal which seals the inner end of the inner bearing.

3. The short span hub according to claim 2, characterized in that: The inner ring of the oil seal is provided with an oil seal seat ring.

4. The short span wheel hub according to any one of claims 1 to 3, characterized in that: The inner bearing and the outer bearing are of the same model.

5. The short span wheel hub according to any one of claims 1 to 3, characterized in that: The steering knuckle passes through the center hole of the wheel hub body and forms a rotation connection with the outer bearing and the inner bearing.

6. The short span hub according to claim 5, characterized in that: An O-type sealing ring is arranged between the steering knuckle and the inner bearing and / or the oil seal seat ring.

7. The short span hub according to claim 1 or 2, characterized in that: The outer wall of the steering knuckle is provided with a structure adapted to the inner ring of the oil seal and cooperates with the oil seal.

8. A vehicle, characterized in that: The invention comprises the short-span hub as described in any one of claims 1 to 7.

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