Hub bearing unit with novel spline structure

Abstract

The utility model discloses a hub bearing unit with a novel spline structure, and particularly relates to the technical field of automobile hubs, the hub bearing unit comprises a hub body, a first connecting flange and a detachable spline shaft, the first connecting flange is arranged on the right end face of the hub body, and the detachable spline shaft is arranged on the first connecting flange. Limiting grooves are formed in the center of an inner cavity of the hub body and the center of an inner cavity of the first connecting flange, the detachable spline shaft is arranged in inner cavities of the limiting grooves, and an inner spline is arranged in an inner cavity of the detachable spline shaft. By means of the detachable spline shaft, a user can easily detach the spline, maintenance personnel can conveniently maintain and replace the spline, the internal spline can be cleaned and checked regularly, the influence of dirt and accumulation is eliminated, bad friction of the internal spline can be reduced, the failure rate is reduced, and normal operation of a hub unit is ensured. And the load borne on the hub body can be uniformly dispersed to all parts through the reinforcing connecting rods, so that the stress concentration phenomenon caused by uneven stress of the structure is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile wheel hubs, and more specifically, to a wheel hub bearing unit with a novel spline structure. Background Art

[0002] With the development of technology, the integration of automobile wheel hub bearing units is getting higher and higher. Automobile bearing units generally include inner rings and outer rings, with single-row or double-row rollers fixed between the inner and outer rings through a cage;

[0003] After searching, the existing patent (publication number: CN215861302U) discloses a wheel hub bearing with internal splines, including an inner ring, on which a plurality of protruding teeth are arranged, and the protruding teeth are evenly distributed circumferentially at the inner hole of the inner ring, and a spline groove is formed between adjacent protruding teeth. Thickened parts are arranged on both sides of the protruding teeth, and the thickened parts are arranged at the opening close to the spline groove, and the axial cross-section of the thickened part is arranged in an arc shape that gradually decreases toward the bottom of the spline groove. In view of the shortcomings of the prior art, the utility model provides a wheel hub bearing with internal splines, which can avoid abnormal noise during starting and enhance the strength of the splines. The inventor found the following problems in the prior art during the implementation of the utility model:

[0004] The existing wheel hub bearings, because the internal splines and the wheel hub unit are important components connecting the tire and the vehicle suspension system, need to be regularly inspected and maintained, resulting in frequent disassembly and replacement, which causes inconvenience. In addition, the vehicle will be exposed to dirt such as dust, mud, and oil stains on the road during driving. These dirt will adhere to the wheel hub and accumulate as the wheel rotates. The accumulated dirt on the internal splines and the wheel hub unit will increase friction, reduce transmission efficiency, and lead to problems such as increased fuel consumption and decreased power of the vehicle. Therefore, when using a wheel hub bearing unit with a new spline structure, a detachable spline shaft is required for easy disassembly.

[0005] Therefore, in order to solve the above problems, a wheel hub bearing unit with a novel spline structure is proposed. Utility Model Content

[0006] In order to overcome the above defects of the prior art, the utility model provides a hub bearing unit with a novel spline structure to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a wheel hub bearing unit with a novel spline structure, comprising a wheel hub body, a first connecting flange and a detachable spline shaft, wherein the right end surface of the wheel hub body is provided with a first connecting flange, the center of the inner cavity of the wheel hub body and the first connecting flange is provided with a limiting groove, the detachable spline shaft is provided in the inner cavity of the limiting groove, and the inner cavity of the detachable spline shaft is provided with an internal spline;

[0008] An installation groove is arranged at the edge on the left side of the limiting groove, a fixing hole is arranged in the inner cavity of the installation groove, a installation plate is arranged on the left end face of the detachable spline shaft, second installation holes are opened at the four corners of the surface of the installation plate, a hexagon socket bolt is arranged in the inner cavity of the second installation hole, and a nut is arranged on the outer surface of the end of the hexagon socket bolt.

[0009] Preferably, the surface of the first connecting flange is provided with first bolts, and the first bolts are provided in several groups. Second connecting flanges are welded at both ends of the hub body, and reinforcing connecting rods are welded between the two groups of second connecting flanges, and the reinforcing connecting rods are provided in six groups.

[0010] Preferably, the detachable spline shaft and the limiting groove are both in a cross-shaped structure, and the inner surface of the limiting groove and the outer surface of the detachable spline shaft abut against each other.

[0011] Preferably, the hexagon socket bolt passes through the second mounting hole and the inner surface of the fixing hole in sequence, and the outer surface of the end of the hexagon socket bolt is meshed with the nut.

[0012] Preferably, the six groups of reinforcing connecting rods surround the outer surface of the hub body at equal intervals, and two ends of the six groups of reinforcing connecting rods are respectively abutted against one side of the opposite surfaces of the two groups of the second connecting flanges.

[0013] Technical effects and advantages of the utility model:

[0014] 1. Compared with the prior art, the hub bearing unit with a new spline structure has a detachable spline shaft. Users can easily remove the splines, making it convenient for maintenance personnel to perform maintenance and replacement. The internal splines can be cleaned and checked regularly to eliminate the influence of dirt and accumulation, reduce the adverse friction of the internal splines, reduce the failure rate, and ensure the normal operation of the hub unit.

[0015] 2. Compared with the existing technology, the wheel hub bearing unit with a new spline structure can help to evenly distribute the load on the wheel hub body to various parts by strengthening the connecting rod, thereby enhancing the overall rigidity and stability of the wheel hub body, reducing local stress concentration, and reducing stress accumulation caused by uneven structural force. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall front view structure of the utility model.

[0017] Figure 2 This is a schematic diagram of the detachable spline shaft structure of the utility model.

[0018] Figure 3 It is a left view structural diagram of the limiting groove of the utility model.

[0019] Figure 4 It is a left-side structural schematic diagram of the utility model.

[0020] Figure 5 It is a right view structural schematic diagram of the utility model.

[0021] The accompanying drawings are marked as follows: 1. hub body; 2. first connecting flange; 3. second connecting flange; 4. reinforcing connecting rod; 5. first bolt; 6. second bolt; 7. limiting groove; 8. mounting groove; 81. fixing hole; 9. removable spline shaft; 91. internal spline; 10. mounting plate; 101. second mounting hole; 11. hexagon socket bolt; 12. nut. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Example 1

[0024] As attached Figures 1 to 5 A hub bearing unit with a novel spline structure is shown, comprising a hub body 1, a first connecting flange 2 and a detachable spline shaft 9, wherein the right end surface of the hub body 1 is provided with the first connecting flange 2, and the centers of the inner cavities of the hub body 1 and the first connecting flange 2 are provided with a limiting groove 7, the detachable spline shaft 9 is arranged in the inner cavity of the limiting groove 7, and the inner cavity of the detachable spline shaft 9 is provided with an inner spline 91, and the shapes of the detachable spline shaft 9 and the limiting groove 7 are both cross-shaped structures;

[0025] A mounting groove 8 is arranged at the edge on the left side of the limiting groove 7, a fixing hole 81 is arranged in the inner cavity of the mounting groove 8, a mounting plate 10 is arranged on the left end face of the detachable spline shaft 9, second mounting holes 101 are opened at the four corners of the surface of the mounting plate 10, a hexagon socket bolt 11 is arranged in the inner cavity of the second mounting hole 101, and a nut 12 is arranged on the outer surface of the end of the hexagon socket bolt 11.

[0026] Among them: the wheel hub body 1 is installed with a detachable spline shaft 9 of a cross-shaped structure through the limiting groove 7 of the inner cavity. The limiting groove 7 is consistent with the shape of the detachable spline shaft 9, so that it can be installed in the inner cavity of the limiting groove 7 with a perfect fit. The mounting groove 8 at the left end of the limiting groove 7 provides an installation space for the mounting plate 10, and four groups of second mounting holes 101 and fixing holes 81 on the surface of the mounting plate 10 are penetrated in sequence by four groups of hexagon socket bolts 11. After penetration, they are engaged and fixed by nuts 12, so that the detachable spline shaft 9 is fixed. The inner spline 91 in the inner cavity of the detachable spline shaft 9 provides a transmission connection between the car and the wheel hub unit, transmitting the driving force and braking force of the vehicle.

[0027] Example 2

[0028] Based on Example 1, the solution in Example 1 is further detailed in combination with the following specific working methods. Figures 1 to 5 As shown, see the following description for details:

[0029] As a preferred embodiment, a first bolt 5 is provided on the surface of the first connecting flange 2, and several groups of the first bolts 5 are provided. Second connecting flanges 3 are welded to both ends of the hub body 1, and one group of the second connecting flanges 3 is connected to the first connecting flange 2 through the second bolts 6; further, the first bolts 5 provide a connection and installation medium with the tire, one group of the second connecting flanges 3 provides a connection function with the transmission system of the automobile, and another group of the second connecting flanges 3 fixes the hub body 1 to one side of the first connecting flange 2.

[0030] As a preferred embodiment, the inner surface of the limit groove 7 abuts against the outer surface of the removable spline shaft 9, and the removable spline shaft 9 passes through the inner surfaces of the two groups of limit grooves 7 in sequence; further, the removable spline shaft 9 can be installed in the inner cavity of the hub body 1 and the first connecting flange 2 through the two groups of limit grooves 7.

[0031] As a preferred embodiment, the hexagon socket bolt 11 passes through the inner surfaces of the second mounting hole 101 and the fixing hole 81 in sequence, and the outer surface of the end of the hexagon socket bolt 11 is engaged with the nut 12; further, the hexagon socket bolt 11 connects the hub body 1 with the detachable spline shaft 9 by passing through the second mounting hole 101 and the fixing hole 81.

[0032] As a preferred embodiment, reinforcing connecting rods 4 are welded between the two groups of second connecting flanges 3, and six groups of reinforcing connecting rods 4 are provided. The six groups of reinforcing connecting rods 4 are equidistantly spaced around the outer surface of the hub body 1, and the two ends of the six groups of reinforcing connecting rods 4 are respectively abutted against one side of the opposite surfaces of the two groups of second connecting flanges 3; further, the six groups of reinforcing connecting rods 4 connect and fix the two groups of second connecting flanges 3 on the outer surface of the hub body 1, so as to effectively disperse the forces in all directions exerted on the hub body 1, thereby improving its overall force-bearing capacity and increasing the overall rigidity and stability.

[0033] The working process of the utility model is as follows: the first connecting flange 2 is connected and installed with the automobile tire through the first bolt 5, the hub body 1 is connected to the transmission system of the automobile through one group of the second connecting flanges 3, and the other group of the first connecting flanges 2 is connected and fixed with the first connecting flange 2 through the second bolts 6. Six groups of reinforcing connecting rods 4 connect and fix the two groups of the second connecting flanges 3 on the outer surface of the hub body 1, so that the forces in all directions received by the hub body 1 can be effectively dispersed. The hub body 1 is loaded with a detachable spline shaft 9 of a cross-shaped structure through the limiting groove 7 of the inner cavity. The limiting groove 7 is consistent with the shape of the detachable spline shaft 9, so that It is tightly installed into the inner cavity of the limiting groove 7, and the installation groove 8 at the left end of the limiting groove 7 provides an installation space for the installation plate 10, and four groups of second installation holes 101 and fixing holes 81 on the surface of the installation plate 10 are penetrated in sequence by four groups of hexagon socket bolts 11. After penetration, they are engaged and fixed by nuts 12, so that the detachable spline shaft 9 is fixed in the two groups of limiting grooves 7 in the inner cavity of the wheel hub body 1 and the first connecting flange 2. The internal spline 91 in the inner cavity of the detachable spline shaft 9 provides a transmission connection between the car and the wheel hub unit, transmitting the driving force and braking force of the vehicle. The above is the working principle of the wheel hub bearing unit with a new spline structure.

[0034] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A hub bearing unit with a novel spline structure, comprising a hub body (1), a first connecting flange (2) and a detachable spline shaft (9), characterized in that: The right end surface of the hub body (1) is provided with a first connecting flange (2), and the centers of the inner cavities of the hub body (1) and the first connecting flange (2) are provided with a limiting groove (7), the detachable spline shaft (9) is arranged in the inner cavity of the limiting groove (7), and the inner cavity of the detachable spline shaft (9) is provided with an internal spline (91); A mounting groove (8) is arranged at the edge of the left side of the limiting groove (7), a fixing hole (81) is arranged in the inner cavity of the mounting groove (8), a mounting plate (10) is arranged on the left end surface of the detachable spline shaft (9), second mounting holes (101) are arranged at the four corners of the surface of the mounting plate (10), a hexagon socket bolt (11) is arranged in the inner cavity of the second mounting hole (101), and a nut (12) is arranged on the outer surface of the end of the hexagon socket bolt (11).

2. A wheel hub bearing unit with a novel spline structure according to claim 1, characterized in that: A first bolt (5) is arranged on the surface of the first connecting flange (2), and the first bolt (5) is arranged in a plurality of groups. Second connecting flanges (3) are welded to both ends of the hub body (1), and a reinforcing connecting rod (4) is welded between the two groups of second connecting flanges (3), and the reinforcing connecting rod (4) is arranged in six groups.

3. The wheel hub bearing unit with a novel spline structure according to claim 2, characterized in that: The shapes of the detachable spline shaft (9) and the limiting groove (7) are both cross-shaped structures, and the inner surface of the limiting groove (7) and the outer surface of the detachable spline shaft (9) are in contact with each other.

4. The wheel hub bearing unit with a novel spline structure according to claim 1, characterized in that: The hexagon socket bolt (11) passes through the second mounting hole (101) and the inner surface of the fixing hole (81) in sequence, and the outer surface of the end of the hexagon socket bolt (11) is meshed with the nut (12).

5. The wheel hub bearing unit with a novel spline structure according to claim 3, characterized in that: The detachable spline shaft (9) passes through the inner surfaces of the two groups of limit grooves (7) in sequence, and one group of second connecting flanges (3) is connected to the first connecting flange (2) via second bolts (6).

6. The wheel hub bearing unit with a novel spline structure according to claim 2, characterized in that: The six groups of reinforcing connecting rods (4) are arranged around the outer surface of the hub body (1) at equal intervals, and the two ends of the six groups of reinforcing connecting rods (4) are respectively abutted against one side of the opposite surfaces of the two groups of the second connecting flanges (3).

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