Lightweight forged hub

Abstract

The utility model relates to a lightweight forged hub, and belongs to the technical field of hubs. The hub comprises a first forging body and a second forging body, and the first forging body and the second forging body are both conical. The large end of the first forging body is provided with an annular first welding joint surface; an annular connecting groove is formed in the end face of the large end of the second forging body and divides the end face of the second butt joint body into an annular second welding joint face and a tire mounting face, and the second welding joint face is located on the inner side of the tire mounting face. A plurality of tire bolt holes are formed in the connecting groove and are used for connecting a tire; the inner sides of the first welding joint face and the second welding joint face are in butt joint and welded, and the outer side of the second welding joint face and the tire mounting face are jointly used for being in butt joint with a tire. The first forging body and the second forging body are respectively forged and formed and then are welded, thermally treated and machined to form the finished hub, the weight is light, and the cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of wheel hubs, and in particular to a lightweight forged wheel hub. Background Art

[0002] Currently, automotive axles are used to transmit the engine's driving force to the wheels, achieving the effect of reducing speed and increasing torque while also changing the direction of power transmission. Wheel hubs are critical safety components that support and enable vehicle rotation, and their load-bearing capacity and other performance indicators are highly demanding. Existing wheel hubs come in two forms: cast ductile iron hubs, which offer the advantage of relatively high strength but are heavy and prone to casting defects; and aluminum alloy hubs, which offer the advantage of being lightweight but are relatively weak and expensive. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a lightweight forged wheel hub which is produced by forging molding technology, has a simple structure and is easy to process; has a lower cost than an aluminum alloy wheel hub, and is lighter in weight than a ductile iron wheel hub.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: a lightweight forged wheel hub, comprising a first forged body and a second forged body, wherein the first forged body and the second forged body are both conical;

[0005] The large end of the first forged body has a first annular welding joint surface;

[0006] An annular connecting groove is provided on the end surface of the large end of the second forged body. The connecting groove divides the end surface of the second abutting body into an annular second welding joint surface and a tire mounting surface. The second welding joint surface is located on the inner side of the tire mounting surface. A plurality of tire bolt holes are provided in the connecting groove for connecting a tire.

[0007] The first welding joint surface is butted against and welded to an inner side of the second welding joint surface, and an outer side of the second welding joint surface and the tire mounting surface are used together for butting against the tire.

[0008] In the above-mentioned lightweight forged wheel hub, the first forged body includes a first sleeve, a first transition body and a first docking body connected in sequence;

[0009] A half-shaft mounting surface is provided on one end of the first sleeve away from the first docking body, and a plurality of half-shaft bolt connection holes are provided on the half-shaft mounting surface for connecting the half-shafts; a first through hole and an outer bearing mounting hole are provided in the first sleeve;

[0010] The first welding joint surface is located at an end of the first butt joint away from the first sleeve;

[0011] A first oil chamber is formed inside the first transition body and the first docking body, and the first through hole, the outer bearing mounting hole and the first oil chamber are connected in sequence.

[0012] In the above-mentioned lightweight forged wheel hub, the outer wall of the first docking body forms a rim stop mounting surface;

[0013] And / or, the aperture of the first through hole is larger than the aperture of the outer bearing mounting hole, forming a first shaft shoulder therebetween;

[0014] And / or, a plurality of first reinforcement protrusions are provided on the outer wall of the first sleeve, and the first reinforcement protrusions correspond one-to-one to the half-shaft bolt connection holes;

[0015] And / or, the first forged body and the second forged body are made of steel.

[0016] In the above-mentioned lightweight forged wheel hub, an annular first limiting platform is provided at one end of the outer bearing mounting hole away from the first through hole, for limiting the outer bearing.

[0017] In the above-mentioned lightweight forged wheel hub, a plurality of first recesses are provided on the first limiting platform.

[0018] In the above-mentioned lightweight forged wheel hub, the second forged body includes a second sleeve, a second transition body and a second docking body connected in sequence;

[0019] An ABS sensor gear ring is provided on the end surface of the second sleeve, and an oil seal mounting hole and an inner bearing mounting hole are provided in the second sleeve;

[0020] The connecting groove is located at an end of the second docking body away from the second sleeve;

[0021] A second oil chamber is formed inside the second transition body and the second docking body, and the oil seal mounting hole, the inner bearing mounting hole and the second oil chamber are connected in sequence.

[0022] In the above-mentioned lightweight forged wheel hub, the oil seal mounting hole and the inner bearing mounting hole are located in the second sleeve;

[0023] and / or, the first forged body and the second forged body are made of steel;

[0024] And / or, the second oil chamber is located in the second transition body and the second docking body;

[0025] And / or, a plurality of second reinforcement protrusions are provided on a side of the second butting body facing away from the second welding joint surface, and positions of the second reinforcement protrusions correspond one-to-one to positions of the tire bolt holes.

[0026] In the above-mentioned lightweight forged wheel hub, the aperture of the oil seal mounting hole is larger than the aperture of the inner bearing mounting hole, forming a second shoulder between the two; the inner side edge of the second shoulder is chamfered to form a guide surface, and the guide surface is connected to the inner wall of the inner bearing mounting hole.

[0027] In the above-mentioned lightweight forged wheel hub, a second limiting platform is provided at one end of the inner bearing mounting hole away from the oil seal mounting hole for limiting the position of the inner bearing.

[0028] In the above-mentioned lightweight forged wheel hub, a plurality of second recesses are provided on the second limiting platform.

[0029] Due to the adoption of the above technical solution, the wheel hub has the following advantages:

[0030] The wheel hub is rationally divided into a first forged body and a second forged body. The first forged body and the second forged body are respectively formed by a billet forging process and then welded, heat treated, and machined to become a finished wheel hub. Compared with cast ductile iron wheels, the weight can be reduced by more than 26%, which meets the development trend of lightweight vehicles and solves the problems of cast hubs with many defects, low strength, and easy breakage. Compared with aluminum alloy wheels, the cost is low and can be reduced by more than 50%.

[0031] It has good comprehensive mechanical properties, good low-temperature impact toughness and low notch sensitivity, and a high safety factor;

[0032] It is beneficial to improve the vehicle's handling stability, driving smoothness and fuel economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0034] Figure 1 This is a schematic diagram of the three-dimensional structure of the lightweight forged wheel hub of the utility model;

[0035] Figure 2 This is a schematic diagram of the three-dimensional structure of the first forged body in the first direction of the lightweight forged wheel hub of the present invention;

[0036] Figure 3 This is a schematic diagram of the three-dimensional structure of the first forged body in the second direction of the lightweight forged wheel hub of the present invention;

[0037] Figure 4This is a schematic diagram of the three-dimensional structure of the second forged body in the first direction of the lightweight forged wheel hub of the present invention;

[0038] Figure 5 This is a schematic diagram of the three-dimensional structure of the second forged body in the second direction of the lightweight forged wheel hub of the present invention;

[0039] Figure 6 It is a cross-sectional view of the lightweight forged wheel hub of the present invention.

[0040] In the picture:

[0041] 100 - first forging body; 101 - first limiting platform; 102 - half-shaft mounting surface; 103 - half-shaft bolt connection hole; 104 - first through hole; 105 - outer bearing mounting hole; 106 - first recess; 107 - first reinforcing protrusion; 108 - first transition body; 109 - first docking body; 110 - first sleeve; 111 - first oil chamber; 112 - first welding joint surface;

[0042] 200-second forging body; 201-ABS sensor ring gear; 202-oil seal mounting hole; 203-second shaft shoulder; 204-guide surface; 205-second shaft sleeve; 206-second recess; 207-second transition body; 208-second docking body; 209-second reinforcing protrusion; 210-tire bolt hole; 211-inner bearing mounting hole; 212-second limit platform; 213-tire mounting surface; 214-connecting groove; 215-second welding joint surface; 216-second oil chamber. DETAILED DESCRIPTION

[0043] like Figure 1 As shown, a lightweight forged wheel hub includes a first forged body 100 and a second forged body 200. The first forged body 100 and the second forged body 200 are made of steel and are forged and then welded into one body.

[0044] like Figure 2 and Figure 3 As shown, the first forged body 100 includes a first sleeve 110, a first transition body 108, and a first docking body 109, which are connected in sequence. The first sleeve 110, the first transition body 108, and the first docking body 109 are an integrated structure. When connected in sequence, the entire structure forms a tapered shape with one end smaller than the other, making it suitable for forging. The end where the first docking body 109 is located is the large end, and the end where the first sleeve 108 is located is the small end.

[0045] The end face of the first sleeve 110 facing away from the first docking member 109 is the axle mounting surface 102. Axle mounting surface 102 is provided with axle bolt connection holes 103 for connecting the axles. An outer bearing mounting hole 105 and a first through-hole 104 are provided within the first sleeve 110. The outer bearing mounting hole 105 and the first through-hole 104 are connected, and the first through-hole 104 opens into the axle mounting surface 102. The diameter of the first through-hole 104 is larger than that of the outer bearing mounting hole 105, forming a first shoulder between the two. The outer bearing mounting hole 105 requires high machining precision, and the first shoulder serves to distinguish the first through-hole 104 from the outer bearing mounting hole 105, facilitating separate fine machining of the outer bearing mounting hole 105 to achieve the desired design precision.

[0046] An annular first stop 101 is provided at one end of the outer bearing mounting hole 105 away from the first through hole 104. The internal cavities of the first transition body 108 and the first docking body 109 form a first oil chamber 111. Preferably, the first stop 101 is provided with a plurality of first recesses 106. Lubricating oil in the first oil chamber 111 can flow from the first recesses 106 into the outer bearing within the outer bearing mounting hole 105, thereby improving the operating performance of the outer bearing.

[0047] The outer wall of the first docking member 109 forms the rim stop mounting surface. The end surface of the first docking member 109, facing away from the first sleeve 110, forms a first welded joint surface 112, which is an annular plane. The outer bearing mounting hole 105 is concentric with the rim stop mounting surface, and the axle shaft mounting surface 102 is perpendicular to the axis of the outer bearing mounting hole 105.

[0048] Furthermore, a plurality of first reinforcing protrusions 107 are provided on the outer wall of the first sleeve 110. The first reinforcing protrusions 107 correspond one-to-one to the positions of the half-shaft bolt connection holes 103 to ensure that the half-shaft bolt connection holes 103 have sufficient external connection mechanical strength. The plurality of first reinforcing protrusions 107 are evenly distributed on the outer circumference of the first sleeve 110.

[0049] Please refer to Figure 4 and Figure 5 The second forged body 200 includes a second sleeve 205, a second transition body 207, and a second docking body 208. The second sleeve 205, the second transition body 207, and the second docking body 208 are connected in sequence to form a tapered shape with one end larger than the other, suitable for forging. The end where the second sleeve 205 is located is the small end, and the end where the second docking body 208 is located is the large end.

[0050] The end surface of the second sleeve 205 is equipped with an ABS sensor ring gear 201. An oil seal mounting hole 202 and an inner bearing mounting hole 211 are provided within the second sleeve 205. The oil seal mounting hole 202 communicates with the inner bearing mounting hole 211, and the oil seal mounting hole 202 opens into the end surface of the second sleeve 205 adjacent to the ABS sensor ring gear 201. The diameter of the oil seal mounting hole 202 is larger than that of the inner bearing mounting hole 211, forming a second shoulder 203 between the two. The inner side of the second shoulder 203 is chamfered to form a guide surface 204, which engages the inner wall of the inner bearing mounting hole 211. This guide surface 204 serves as a guide during bearing installation, facilitating assembly of the outer bearing.

[0051] A second stop 212 is provided at the end of the inner bearing mounting hole 211 away from the second shoulder 203 to limit the bearing position. A second oil chamber 216 is formed within the second transition body 207 and the second docking body 208. Several second recesses 206 are provided on the second stop 212. Lubricating oil in the second oil chamber 216 can flow through these recesses into the inner bearing within the inner bearing mounting hole 211, improving the operating performance of the inner bearing.

[0052] The second mating body 208 is disc-shaped, with an annular connecting groove 214 on its end surface facing the first forged body 100. This annular connecting groove 214 divides the end surface of the second mating body 208 into a second welded joint surface 215 located on the inner side and a tire mounting surface 213 located on the outer side. Both the second welded joint surface 215 and the tire mounting surface 213 are annular. The second welded joint surface 215 and the tire mounting surface 213 are coaxial. The inner bearing mounting hole 211 and the oil seal mounting hole 202 are coaxial, with the axis perpendicular to the second welded joint surface 215 and the tire mounting surface 213.

[0053] The first welding joint surface 112 is butted against the inside of the second welding joint surface 215 and welded and solidified into one piece; the welding method can be inert gas shielded welding, friction welding, submerged arc welding or laser welding, etc. The outside of the second welding joint surface 215 and the tire mounting surface 213 cooperate with and connect to the wheel. A plurality of tire bolt holes 210 are provided in the connecting groove 214, and a detachable connection between the tire and the wheel hub is achieved through a bolt assembly. Preferably, a plurality of second reinforcing protrusions 209 are provided on the side of the second docking body 208 facing away from the second welding joint surface 215. The position of the second reinforcing protrusion 209 corresponds to the position of the tire bolt hole 210, thereby strengthening the local strength of the tire bolt hole 210 and improving the reliability of the connection.

[0054] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A lightweight forged wheel hub, characterized by: It comprises a first forged body (100) and a second forged body (200), wherein the first forged body (100) and the second forged body (200) are both conical; The large end of the first forged body (100) has an annular first welding joint surface (112); An annular connecting groove (214) is provided on the end surface of the large end of the second forged body (200), and the connecting groove (214) divides the end surface of the second docking body (208) into an annular second welding joint surface (215) and a tire mounting surface (213), wherein the second welding joint surface (215) is located on the inner side of the tire mounting surface (213); a plurality of tire bolt holes (210) are provided in the connecting groove (214) for connecting a tire; The first welding joint surface (112) is butted against and welded to the inner side of the second welding joint surface (215), and the outer side of the second welding joint surface (215) and the tire mounting surface (213) are used together for butting against the tire.

2. The lightweight forged wheel hub according to claim 1, characterized in that: The first forged body (100) comprises a first sleeve (110), a first transition body (108) and a first docking body (109) connected in sequence; A half-shaft mounting surface (102) is provided at one end of the first shaft sleeve (110) away from the first docking body (109), and a plurality of half-shaft bolt connection holes (103) are provided on the half-shaft mounting surface (102) for connecting the half-shafts; a first through hole (104) and an outer bearing mounting hole (105) are provided in the first shaft sleeve (110); The first welding joint surface (112) is located at an end of the first docking body (109) away from the first shaft sleeve (110); A first oil chamber (111) is formed inside the first transition body (108) and the first docking body (109), and the first through hole (104), the outer bearing mounting hole (105) and the first oil chamber (111) are connected in sequence.

3. The lightweight forged wheel hub according to claim 2, characterized in that: The outer wall of the first docking body (109) forms a rim stop mounting surface; And / or, the aperture of the first through hole (104) is larger than the aperture of the outer bearing mounting hole (105), forming a first shaft shoulder between the two; And / or, a plurality of first reinforcement protrusions (107) are provided on the outer wall of the first shaft sleeve (110), and the first reinforcement protrusions (107) correspond one-to-one to the half-shaft bolt connection holes (103); And / or, the material of the first forged body (100) and the second forged body (200) is steel.

4. The lightweight forged wheel hub according to claim 2, characterized in that: An annular first limiting platform (101) is provided at one end of the outer bearing mounting hole (105) away from the first through hole (104) for limiting the outer bearing.

5. The lightweight forged wheel hub according to claim 4, characterized in that: A plurality of first recesses (106) are provided on the first limiting platform (101).

6. The lightweight forged wheel hub according to claim 1, characterized in that: The second forged body (200) comprises a second sleeve (205), a second transition body (207) and a second docking body (208) connected in sequence; An ABS sensor gear ring (201) is provided on the end surface of the second shaft sleeve (205), and an oil seal mounting hole (202) and an inner bearing mounting hole (211) are provided in the second shaft sleeve (205); The connecting groove (214) is located at an end of the second docking body (208) away from the second shaft sleeve (205); A second oil chamber (216) is formed inside the second transition body (207) and the second docking body (208), and the oil seal mounting hole (202), the inner bearing mounting hole (211) and the second oil chamber (216) are sequentially connected.

7. The lightweight forged wheel hub according to claim 6, characterized in that: A plurality of second reinforcement protrusions (209) are provided on the side of the second docking body (208) facing away from the second welding joint surface (215), and the positions of the second reinforcement protrusions (209) correspond one-to-one to the positions of the tire bolt holes (210).

8. The lightweight forged wheel hub according to claim 6, characterized in that: The diameter of the oil seal mounting hole (202) is larger than the diameter of the inner bearing mounting hole (211), forming a second shaft shoulder (203) therebetween; the inner side edge of the second shaft shoulder (203) is chamfered to form a guide surface (204), and the guide surface (204) is connected to the inner wall of the inner bearing mounting hole (211).

9. The lightweight forged wheel hub according to claim 6, characterized in that: A second limiting platform (212) is provided at one end of the inner bearing mounting hole (211) away from the oil seal mounting hole (202) for limiting the position of the inner bearing.

10. The lightweight forged wheel hub according to claim 9, characterized in that: A plurality of second recesses (206) are provided on the second limiting platform (212).

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