Lightweight hollow noise-reducing wheel hub and mold

Abstract

The application discloses a hollow noise-reducing light-weight hub and a hub mold, which comprise a rim and spokes, the rim is provided with an outer window and a gas port, a hollow cavity is arranged in the rim, the hollow cavity is provided with a first aperture at the outer window and a second aperture at the gas port, and a third aperture is arranged on the back side of the spoke; the above structure makes the wall thickness of the rim uniform, casting defects are not easy to occur, noise can be reduced, the hub can be lightened, and the weight of the hub is lighter than that of an existing hub; the mold comprises 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 recess and a second recess; the main body of the sand core is provided with a first convex portion and a second convex portion; the upper mold is press-fitted on the sand core, the bottom of the upper mold is provided with an arc pressing portion, the arc pressing portion is arranged above the groove portion, the arc pressing portion is in contact with the top surface of the boss portion, the lower mold, the sand core and the upper mold are assembled and fixed, and product casting is completed.

Description

Technical Field

[0001] The present 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 diverse lightweight solutions. The need to reduce unsprung mass is particularly prominent. As an important component of unsprung mass, wheels account for a large proportion of the overall mass of the vehicle. One effective way to reduce weight is to optimize the wheel hub structure. At the same time, with the increasing demand for vehicle comfort, the need to reduce 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 through wheel hub structure design 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, a first embodiment of the present invention provides a lightweight hollow hub with noise reduction, comprising a rim and spokes, 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 provided within the rim and has a first opening and a second opening, respectively; the first opening is provided at the outer window, and the second opening is provided on the left and right sides of the valve hole; a third opening is provided on the back side of the spoke, and the third opening 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:

[0006] Under the premise of meeting the performance of the wheel hub, a hollow cavity is set 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 reducing 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.

[0007] The 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, and 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 on 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 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.

[0008] 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.

[0009] According to some embodiments of the present invention, the first concave portion 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 convex portion includes a first pressure block and a first pressure plate, and the first pressure block is pressed into the first transverse groove portion, and the first pressure plate is pressed into the second transverse groove portion.

[0010] According to some embodiments of the present invention, two openings are formed on the second concave portion, the second convex portion includes a second pressure block and a connecting plate, two second pressure blocks are used, two second pressure blocks are pressed into the openings, and the connecting plate is used to connect the two second pressure blocks.

[0011] According to some embodiments of the present invention, the horizontal plate is oriented toward the center of the lower mold.

[0012] According to some embodiments of the present invention, a protrusion is provided on the lower mold, and the protrusion is arranged around the center point of the lower mold, and the protrusion is used to form the mounting hole.

[0013] According to some embodiments of the present invention, the first notch is pressed on an end portion of the horizontal plate.

[0014] According to some embodiments of the present invention, the second recess is pressed against the first protrusion and the second protrusion.

[0015] The present invention has at least the following beneficial effects:

[0016] The lower mold is provided with a boss portion and a groove portion, and the boss portion is provided with a first recess and a second recess; the sand core is placed on the lower mold, and the main body of the sand core is provided with a first convex portion and a second convex portion, the second convex portion is installed in the second recess, and the second convex portion is used to form the second orifice; the upper mold is pressed on the sand core, and the bottom of the upper mold is provided with an arc pressure portion and an arc pressure portion, the arc pressure portion is pressed above the groove portion, and the arc pressure portion is provided with a first recess, the arc pressure portion contacts the top surface of the boss portion, and the arc pressure portion is provided with a second recess, 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.

[0017] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0019] Figure 1 A three-dimensional schematic diagram of a wheel hub according to the first embodiment of the present invention Figure 1 ;

[0020] Figure 2 A three-dimensional schematic diagram of a wheel hub according to the first embodiment of the present invention Figure 2 ;

[0021] Figure 3 A schematic side view of a wheel hub according to an embodiment of the first aspect of the present invention;

[0022] Figure 4 for Figure 3 Schematic cross-section of the middle AA;

[0023] Figure 5 A schematic top view of a wheel hub according to an embodiment of the first aspect of the present invention;

[0024] Figure 6 for Figure 3 Schematic cross-section of the middle BB;

[0025] Figure 7 for Figure 3 Schematic cross-section of the CC;

[0026] Figure 8 for Figure 3 Schematic cross-section of the middle DD;

[0027] Figure 9 A schematic diagram of a mold assembly state according to an embodiment of the second aspect of the present invention;

[0028] Figure 10 Schematic diagram of the mold explosion state according to the second embodiment of the present invention Figure 1 ;

[0029] Figure 11 Schematic diagram of the mold explosion state according to the second embodiment of the present invention Figure 2 ;

[0030] Figure 12 This is a schematic diagram of the assembly state of the lower mold and the sand core according to the second embodiment of the present invention;

[0031] Figure 13 This is a schematic diagram of the explosion state of the lower mold and the sand core according to the second embodiment of the present invention;

[0032] Figure 14 This is a schematic diagram of the upper mold and sand core assembly state according to the second embodiment of the present invention;

[0033] Figure 15 Schematic diagram of the explosion state of the upper mold and the sand core according to the second embodiment of the present invention;

[0034] Figure 16 A schematic top view of a mold according to an embodiment of the second aspect of the present invention;

[0035] Figure 17 for Figure 16 Schematic diagram of the middle EE section;

[0036] Figure 18 for Figure 16 Schematic diagram of the FF cross section;

[0037] Figure 19 for Figure 16 Schematic diagram of the GG section. DETAILED DESCRIPTION

[0038] The following describes embodiments of the present invention in detail. Examples of the embodiments 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 intended only to explain the present invention and are not to be construed as limiting the present invention.

[0039] Reference Figures 1 to 6As 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; a third orifice 400 is opened on the back side of the spoke 102, and the third orifice 400 is connected to the hollow cavity 100 through a channel 500.

[0040] 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 reducing the noise generated by the wheel hub rubbing or colliding with 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 to ensure that there is no wind noise during driving.

[0041] By providing a hollow cavity 100 in the rim 101 and opening a third opening 400 on the back side of the spoke 102, the above structure makes the wall thickness at the rim uniform, is less likely to produce casting defects, reduces noise, and makes the wheel hub lightweight, which is 10% lighter than the existing wheel hub.

[0042] 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.

[0043] There are multiple first holes 200 and second holes 300, and the second holes 300 and the first holes 200 are arranged around the axis of the rim 101.

[0044] 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 combined, the two molding cavities are combined into a complete casting component; after the mold is completed, 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 completing the above preparations, casting begins, and 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, and the sand core is processed at the same time, that is, the sand core is cleaned out from the casting so that the casting component obtains an internal cavity.

[0045] Reference Figures 9 to 11 , 16 to 19, a hub mold is used for the above-mentioned hollow noise-reducing lightweight 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.

[0046] Specifically, the sand core 700 includes a main body 710, which is provided with a first protrusion 720, a second protrusion 730, and a lower extension plate 740. 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.

[0047] 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 .

[0048] 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.

[0049] 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 .

[0050] A first recess 811 is provided on the arc pressure portion 810, and the first recess 811 cooperates with the horizontal plate 741. A second recess 821 is provided on the arc surface portion 820; the second recess 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.

[0051] Reference Figure 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 pressure block 721 and a first pressure plate 722, the first pressure block 721 is pressed into the first transverse groove portion 6111, and the first pressure plate 722 is pressed into the second transverse groove portion 6112, so that the first protrusion 720 is firmly placed in the first recess 611 to avoid displacement.

[0052] 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 opening 6121, so that the second pressure blocks 731 are firmly placed in the opening 6121, and the two second pressure blocks 731 are connected by the connecting plate 732.

[0053] The lower mold 600 and the sand core 700 are assembled and fixed by making the first protrusion 720 cooperate with the first concave portion 611 and the second pressing block 731 cooperate with the second concave portion 612 .

[0054] Reference Figure 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 .

[0055] Reference Figure 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.

[0056] Reference Figure 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 .

[0057] 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 scope of knowledge possessed by ordinary technicians in the technical field without departing from the scope 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 includes a hollow cavity (100), the hollow cavity (100) being arranged in the rim (101), and the hollow cavity (100) is respectively provided with a first opening (200) and a second opening (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); a third orifice (400) is opened on the back side of the spoke (102), and the third orifice (400) is connected to the hollow cavity (100) through a channel (500); 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 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).

2. A wheel hub mold, characterized in that: A mold for casting a hollow noise-reducing lightweight wheel hub according to claim 1 includes: 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) is used to form the hollow cavity (100), the sand core (700) includes a main body (710), the main body (710) is placed on the lower mold (600), the main body (710) is provided with a first convex portion (720), a second convex portion (730), and a lower extension plate (740), the first convex portion (720) is installed in the first concave position (611), the first convex portion (720) is used to form the first orifice (200), the second convex portion (730) is installed in the second concave position (612), the second convex portion (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); An upper mold (800) is press-fitted onto the sand core (700). An arc-pressing portion (810) and an arc-face portion (820) are provided at the bottom of the upper mold (800). The arc-pressing portion (810) is pressed onto the top of the groove portion (620). A first recess (811) is provided on the arc-pressing portion (810). The arc-face portion (820) contacts the top surface of the boss portion (610). A second recess (821) is provided on the arc-face portion (820). The first recess (811) cooperates with the horizontal plate (741); and the second recess (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).

3. A wheel hub mold according to claim 2, characterized in that: The first concave portion (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 convex portion (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).

4. A wheel hub mold according to claim 2, 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).

5. The wheel hub mold according to claim 2, characterized in that: The horizontal plate (741) faces the center of the lower mold (600).

6. A wheel hub mold according to claim 2, characterized in that: A convex block (630) is provided 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.

7. The wheel hub mold according to claim 2, characterized in that: The first notch (811) is pressed against the end of the horizontal plate (741).

8. The wheel hub mold according to claim 2, 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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