Hollow noise-reducing lightweight hub and mold

Abstract

The hollow noise-reduction light-weight hub comprises a rim and a spoke, an outer window and a valve hole are formed in the rim, a hollow cavity is formed in the rim, meanwhile, a first hole opening is formed in the position, at the outer window, of the hollow cavity, a second hole opening is formed in the position, at the valve hole, of the hollow cavity, and a third hole opening is formed in the back side face of the spoke; by means of the structure, the wall thickness of the rim is even, casting defects are not prone to being generated, noise can be lowered, and the hub can be lightened and is lighter than an existing hub. The mold comprises a lower mold, a sand core and an upper mold; the lower die is provided with a boss part and a groove part, and the boss part is provided with a first concave position and a second concave position; a first convex part and a second convex part are arranged on a main body of the sand core; the upper die is pressed on the sand core, an arc pressing part is arranged at the bottom of the upper die, the arc pressing part is pressed above the groove part, and the arc pressing part is in contact with the top surface of the boss part, so that the lower die, the sand core and the upper die are assembled and fixed, and product casting is completed.

Description

Technical Field

[0001] The invention relates to the technical field of wheel hubs, and in particular to a hollow noise-reducing lightweight wheel hub and a mold. Background Art

[0002] With the increasing demand for environmental protection and energy conservation, the global automotive industry is seeking a variety of lightweight solutions. The demand for reducing unsprung mass is particularly prominent. As an important component of unsprung mass, wheels account for a large proportion of the overall mass of the car. One of the effective ways to reduce weight is to optimize the structure of the wheel hub. At the same time, with the increasing demand for car comfort, the demand for reducing noise is even more important. Since the friction or collision between the wheel hub and the ground after the tire is installed will generate a lot of noise, reducing noise by designing the structure of the wheel hub is an important method. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the first aspect of the present invention proposes a lightweight hub with hollow noise reduction, including a rim and a spoke, wherein the rim is provided with an outer window and a valve hole, wherein the outer window is located between adjacent spokes, and further comprising a hollow cavity, wherein the hollow cavity is arranged in the rim, and wherein the hollow cavity is provided with a first orifice and a second orifice respectively; the first orifice is provided at the outer window, and the second orifice is provided at the left and right sides of the valve hole; a third orifice is provided on the back side of the spoke, and the third orifice is connected to the hollow cavity through a channel.

[0004] According to some embodiments of the present invention, the cavity wall of the hollow cavity includes a first wall portion, a second wall portion, and a third wall portion. The wall thickness of the first wall portion is the same as the wall thickness of the second wall portion, and the wall thickness of the third wall portion is greater than the thickness of the first wall portion and the second wall portion.

[0005] The present invention has at least the following beneficial effects: Under the premise of satisfying the performance of the wheel hub, a hollow cavity is provided in the rim to reduce the mass of the wheel hub to the maximum extent, making the wheel hub lightweight, and at the same time being able to reduce the noise generated by the friction or collision between the wheel hub and the ground after the tire is installed; at the same time, the hollow cavity opens a first hole at the outer window, a second hole at the valve hole, and a third hole on the back side of the spoke, to ensure that there is no wind noise during driving.

[0006] A second aspect of the present invention provides a wheel hub mold for the above-mentioned hollow noise-reducing lightweight wheel hub, the mold comprising a lower mold, a sand core, and an upper mold; the lower mold is provided with a boss portion and a groove portion, the boss portion is provided with a first recessed position and a second recessed position; the sand core is used to form the hollow cavity, the sand core comprises a main body, the main body is placed on the lower mold, the main body is provided with a first convex portion, a second convex portion, and a lower extension plate, the first convex portion is installed in the first recessed position, the first convex portion is used to form the first orifice, the second convex portion is installed in the second recessed position, the second convex portion is used to form the The second opening, the lower extension plate is provided with a horizontal plate, and the horizontal plate is used to form the third opening; the upper mold is pressed onto the sand core, and the bottom of the upper mold is provided with an arc pressure part and an arc surface part, the arc pressure part is pressed above the groove part, and the arc pressure part is provided with a first recess, the arc surface part contacts with the top surface of the boss part, and the arc surface part is provided with a second recess, the first recess cooperates with the horizontal plate; the second recess cooperates with the first convex part and the second convex part; the arc pressure part cooperates with the groove part to form the spoke, and the arc surface part cooperates with the boss part to form the outer window.

[0007] According to some embodiments of the present invention, the arc pressure portion cooperates with the groove portion to form the spoke, and the arc surface portion cooperates with the boss portion to form the outer window.

[0008] According to some embodiments of the present invention, the first recess includes a first transverse groove portion and a second transverse groove portion, and the length of the second transverse groove portion is greater than that of the first transverse groove portion; the first protrusion includes a first pressure block and a first pressure plate, and the first pressure block is pressed in the first transverse groove portion, and the first pressure plate is pressed in the second transverse groove portion.

[0009] According to some embodiments of the present invention, two openings are formed on the second concave portion, the second convex portion includes a second pressing block and a connecting plate, two second pressing blocks are used, two second pressing blocks are pressed into the openings, and the connecting plate is used to connect the two second pressing blocks.

[0010] According to some embodiments of the present invention, the horizontal plate is toward the center of the lower mold.

[0011] According to some embodiments of the present invention, a protrusion is disposed on the lower mold, the protrusion is disposed around the center point of the lower mold, and the protrusion is used to form a mounting hole.

[0012] According to some embodiments of the present invention, the first notch is pressed on an end portion of the horizontal plate.

[0013] According to some embodiments of the present invention, the second recess is pressed on the first protrusion and the second protrusion.

[0014] The present invention has at least the following beneficial effects: A boss portion and a groove portion are provided on the lower mold, and a first recess and a second recess are provided on the boss portion; the sand core is placed on the lower mold, and a first convex portion and a second convex portion are provided on the main body of the sand core, and the second convex portion is installed in the second recess, and the second convex portion is used to form a second orifice; the upper mold is press-mounted on the sand core, and an arc pressure portion and an arc pressure portion are provided on the bottom of the upper mold, and the arc pressure portion is pressed on the top of the groove portion, and a first recess is provided on the arc pressure portion, and the arc pressure portion contacts the top surface of the boss portion, and a second recess is provided on the arc pressure portion, and the first recess cooperates with the horizontal plate, and the second recess cooperates with the first convex portion and the second convex portion, so as to realize the fixation of the sand core and complete the product casting.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 A three-dimensional schematic diagram of a wheel hub according to an embodiment of the first aspect of the present invention Figure 1 ; Figure 2 A three-dimensional schematic diagram of a wheel hub according to an embodiment of the first aspect of the present invention Figure 2 ; Figure 3 A schematic side view of a wheel hub according to an embodiment of the first aspect of the present invention; Figure 4 for Figure 3 Schematic diagram of the cross section of AA; Figure 5 A schematic top view of a wheel hub according to an embodiment of the first aspect of the present invention; Figure 6 for Figure 3 Schematic cross-section of the middle BB; Figure 7 for Figure 3 Schematic cross-section of the CC; Figure 8 for Figure 3 Schematic cross-section of the middle DD; Fig. 9 A schematic diagram of a mold assembly state of an embodiment of the second aspect of the present invention; Fig.10 Schematic diagram of the mold explosion state of the second embodiment of the present invention Figure 1 ; Fig.11 Schematic diagram of the mold explosion state of the second embodiment of the present invention Figure 2 ; Fig.12 It is a schematic diagram of the assembly state of the lower mold and the sand core of the second embodiment of the present invention; Fig.13 It is a schematic diagram of the explosion state of the lower mold and the sand core of the embodiment of the second aspect of the present invention; Fig.14 It is a schematic diagram of the combined state of the upper mold and the sand core of the embodiment of the second aspect of the present invention; Fig.15 It is a schematic diagram of the explosion state of the upper mold and the sand core in the embodiment of the second aspect of the present invention; Fig.16 A schematic top view of a mold according to an embodiment of the second aspect of the present invention; Fig.17 for Fig.16 Schematic diagram of the EE section; Fig.18 for Fig.16 Schematic diagram of the FF cross section; Fig.19 for Fig.16 Schematic diagram of the GG section. DETAILED DESCRIPTION

[0017] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0018] Reference Figures 1 to 6 As shown, a lightweight wheel hub with hollow noise reduction includes a rim 101 and spokes 102. The rim 101 is provided with an outer window 103 and a valve hole 104. The wheel hub adopts a spoke design, so the outer window 103 is formed between the spokes 102. The valve hole 104 is used to install a tire valve and inflate the tire through the tire valve. The wheel hub also includes a hollow cavity 100. The hollow cavity 100 is arranged in the rim 101. The hollow cavity 100 is respectively provided with a first orifice 200 and a second orifice 300; the first orifice 200 is opened at the outer window 103, and the second orifice 300 is opened on the left and right sides of the valve hole 104; the back side of the spoke 102 is provided with a third orifice 400, and the third orifice 400 is connected to the hollow cavity 100 through a channel 500.

[0019] Under the premise of satisfying the performance of the wheel hub, a hollow cavity 100 is provided in the rim 101 to reduce the mass of the wheel hub to the maximum extent, making the wheel hub lightweight, and at the same time being able to reduce the noise generated by the friction or collision between the wheel hub and the ground after the tire is installed; at the same time, the hollow cavity 100 opens a first opening 200 at the outer window 103 and a second opening 300 at the valve hole 104, ensuring that there is no wind noise during driving.

[0020] By setting a hollow cavity 100 in the rim 101 and opening a third hole 400 on the back side of the spoke 102; the above structure makes the wall thickness at the rim uniform, is not easy to produce casting defects, reduces noise, and makes the wheel hub lightweight, which is 10% lighter than the existing wheel hub.

[0021] Reference Figure 5 , 7 8. The cavity wall of the hollow cavity 100 includes a first wall portion 110, a second wall portion 120, and a third wall portion 130. The third wall portion 130 is provided with a first opening 200 and a second opening 300. The wall thickness of the first wall portion 110 is the same as that of the second wall portion 120, and the wall thickness of the third wall portion 130 is greater than the thickness of the first wall portion 110 and the second wall portion 120.

[0022] A plurality of first holes 200 and second holes 300 are provided, and the second holes 300 and the first holes 200 are arranged around the axis of the rim 101.

[0023] First, a mold is made, and a molding cavity of the mold is made according to the external shape of the casting component. The molding cavity of the mold adopts a split mold unlike the usual mold, that is, the mold is divided into two. After the two molds are assembled, the two molding cavities are combined into a complete casting component. After the mold is made, a sand core is made according to the shape of the internal cavity of the casting component. After the sand core is made, the sand core is placed in the mold and fixed. After the above preparations are completed, casting begins. The liquid metal used for casting is filled into the mold through the gap between the sand core and the molding cavity of the mold, and the sand core is wrapped. After cooling, the mold is opened to obtain the blank of the casting component. At the same time, the sand core is processed, that is, the sand core is cleaned out from the casting so that the casting component obtains an internal cavity.

[0024] Reference Figures 9 to 11 As shown in 16 to 19, a wheel hub mold is used for the above-mentioned hollow noise-reducing lightweight wheel hub. According to the above-mentioned production principle, the mold includes a lower mold 600, a sand core 700, and an upper mold 800; wherein the sand core 700 is used to form the hollow cavity 100, the sand core 700 is placed and fixed on the lower mold 600, and the upper mold 800 is pressed onto the sand core 700.

[0025] Specifically, the sand core 700 includes a main body 710, on which a first protrusion 720, a second protrusion 730, and a lower extension plate 740 are provided. The first protrusion 720 is installed in the first recess 611, and the first protrusion 720 is used to form the first orifice 200. The second protrusion 730 is installed in the second recess 612, and the second protrusion 730 is used to form the second orifice 300. The lower extension plate 740 is provided with a horizontal plate 741, and the horizontal plate 741 is used to form the third orifice 400. After the casting is completed, the sand core 700 is cleaned through the first orifice 200, the second orifice 300, and the third orifice 400.

[0026] Specifically, the lower mold 600 is provided with a boss portion 610 and a groove portion 620 , and the boss portion 610 is provided with a first recessed position 611 and a second recessed position 612 .

[0027] The bottom of the upper mold 800 is provided with an arc pressure portion 810 and an arc surface portion 820. The arc pressure portion 810 is pressed above the groove portion 620. The liquid metal used for casting is formed between the arc pressure portion 810 and the groove portion 620 to form the spoke 102. The arc surface portion 820 contacts the top surface of the boss portion 610 , and the arc surface portion 820 cooperates with the boss portion 610 to form the outer window 103 .

[0028] A first notch 811 is provided on the arc pressure portion 810, and the first notch 811 cooperates with the horizontal plate 741. A second notch 821 is provided on the arc surface portion 820; the second notch 821 cooperates with the first convex portion 720 and the second convex portion 730, so that the lower mold 600, the sand core 700, and the upper mold 800 are assembled and fixed to realize product casting.

[0029] Reference Fig.12 , 13 As shown, specifically, the first recess 611 includes a first transverse groove portion 6111 and a second transverse groove portion 6112, and the length of the second transverse groove portion 6112 is greater than that of the first transverse groove portion 6111; the first protrusion 720 includes a first pressing block 721 and a first pressing plate 722, the first pressing block 721 is pressed in the first transverse groove portion 6111, and the first pressing plate 722 is pressed in the second transverse groove portion 6112, so that the first protrusion 720 is firmly placed in the first recess 611 to avoid displacement.

[0030] Specifically, two openings 6121 are formed on the second recess 612, and the second protrusion 730 includes a second pressure block 731 and a connecting plate 732. Two second pressure blocks 731 are used, and the two second pressure blocks 731 are pressed into the openings 6121, so that the second pressure blocks 731 are firmly placed in the openings 6121, and the two second pressure blocks 731 are connected by the connecting plate 732.

[0031] The lower mold 600 and the sand core 700 are assembled and fixed by making the first protrusion 720 cooperate with the first concave position 611 and the second pressing block 731 cooperate with the second concave position 612 .

[0032] Reference Fig.12 As shown, specifically, the lower extension plate 740 is provided with a horizontal plate 741 , and the horizontal plate 741 faces the center of the lower mold 600 .

[0033] Reference Fig.12 As shown, a protrusion 630 is provided on the lower mold 600 , and the protrusion 630 is arranged around the center point of the lower mold 600 . The protrusion 630 is used to form a mounting hole, and the mounting hole is used for fixed installation of the wheel hub.

[0034] Reference Fig.14 , 15 As shown, in a specific assembly, the first recess 811 is pressed against the end of the horizontal plate 741 ; the second recess 821 is pressed against the first protrusion 720 and the second protrusion 730 .

[0035] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A hollow, noise-reducing, lightweight wheel hub, comprising a rim (101) and spokes (102), wherein the rim (101) is provided with an outer window (103) and a valve hole (104), wherein the outer window (103) is located between adjacent spokes (102), and wherein: It also comprises a hollow cavity (100), wherein the hollow cavity (100) is arranged in the wheel rim (101), and the hollow cavity (100) is respectively provided with a first opening (200) and a second opening (300); The first opening (200) is opened at the outer window (103), and the second opening (300) is opened on the left and right sides of the valve hole (104); a third opening (400) is opened on the back side of the spoke (102), and the third opening (400) is connected to the hollow cavity (100) through a channel (500).

2. A hollow noise-reducing lightweight wheel hub according to claim 1, characterized in that: A plurality of the first orifices (200) and the second orifices (300) are provided, and the first orifices (200) and the second orifices (300) are arranged around the axis of the wheel hub; The hollow cavity (100) comprises a cavity wall, wherein a cross section of the cavity wall passing through the axis of the hub at the first orifice (200) and the second orifice (300) comprises a first wall portion (110), a second wall portion (120), and a third wall portion (130); The first orifice (200) and the second orifice (300) are located at the third wall portion (130). The first wall portion (110) is opened on the third wall portion (130) and is connected to the second wall portion (120); the second wall portion (120) is connected to the third wall portion (130); and the third wall portion (130) is opposite to the first wall portion (110) and the second wall portion (120); The wall thickness of the first wall portion (110) is the same as the wall thickness of the second wall portion (120), and the wall thickness of the third wall portion (130) is greater than the thickness of the first wall portion (110) and the second wall portion (120).

3. A wheel hub mold, characterized in that: A mold for casting a hollow noise-reducing lightweight wheel hub as claimed in any one of claims 1 to 2 comprises: A lower mold (600), wherein the lower mold (600) is provided with a boss portion (610) and a groove portion (620), and the boss portion (610) is provided with a first recessed position (611) and a second recessed position (612); A sand core (700), the sand core (700) being used to form the hollow cavity (100), the sand core (700) comprising a main body (710), the main body (710) being placed on the lower mold (600), the main body (710) being provided with a first convex portion (720), a second convex portion (730), and a lower extension plate (740), the first convex portion (720) being mounted in the first concave position (611), the first convex portion (720) being used to form the first orifice (200), the second convex portion (730) being mounted in the second concave position (612), the second convex portion (730) being used to form the second orifice (300), the lower extension plate (740) being provided with a horizontal plate (741), the horizontal plate (741) being used to form the third orifice (400); An upper mold (800), the upper mold (800) is press-fitted onto the sand core (700), an arc pressure portion (810) and an arc surface portion (820) are provided at the bottom of the upper mold (800), the arc pressure portion (810) is pressed on the top of the groove portion (620), a first notch (811) is provided on the arc pressure portion (810), the arc surface portion (820) contacts the top surface of the boss portion (610), a second notch (821) is provided on the arc surface portion (820), the first notch (811) cooperates with the horizontal plate (741), and the second notch (821) cooperates with the first convex portion (720) and the second convex portion (730); The arc pressure portion (810) cooperates with the groove portion (620) to form the spoke (102), and the arc surface portion (820) cooperates with the boss portion (610) to form the outer window (103).

4. A wheel hub mold according to claim 3, characterized in that: The first recess (611) includes a first transverse groove portion (6111) and a second transverse groove portion (6112), and the length of the second transverse groove portion (6112) is greater than that of the first transverse groove portion (6111); the first protrusion (720) includes a first pressing block (721) and a first pressing plate (722), and the first pressing block (721) is pressed into the first transverse groove portion (6111), and the first pressing plate (722) is pressed into the second transverse groove portion (6112).

5. A wheel hub mold according to claim 3, characterized in that: The second concave portion (612) has two openings (6121), and the second convex portion (730) includes a second pressing block (731) and a connecting plate (732). Two second pressing blocks (731) are used, and the two second pressing blocks (731) are pressed into the openings (6121). The connecting plate (732) is used to connect the two second pressing blocks (731).

6. A wheel hub mold according to claim 3, characterized in that: The horizontal plate (741) faces the center of the lower mold (600).

7. A wheel hub mold according to claim 3, characterized in that: A convex block (630) is arranged on the lower mold (600), the convex block (630) is arranged around the center point of the lower mold (600), and the convex block (630) is used to form a mounting hole.

8. The wheel hub mold according to claim 3, characterized in that: The first notch (811) is pressed against the end of the horizontal plate (741).

9. A wheel hub mold according to claim 3, characterized in that: The second notch (821) is pressed against the first convex portion (720) and the second convex portion (730).

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