A bush assembly in an aluminum wheel

Abstract

The present disclosure provides a bush assembly in an aluminum wheel including a disc (102) with bolt holes (103). The bolt hole (103,601,605,610) can extend between a first edge and a second edge of the wheel disc (102). The bush (104) engages with an inner surface of the bolt hole. The bush (104) can include a cylindrical portion (104a), a transition portion (104b), and a radial portion (104c). The cylindrical portion (104a) engages with a length of a cylindrical surface (103b) of the bolt hole, the transition portion (104b) engages with an inclined surface (103c) of the bolt hole (103). The radial portion (104c) is provided as a surface extending radially inwards at an end of the transition portion (104b), wherein the radial portion engages with the first edge. An engagement means is provided circumferentially on an the bush (104) for engaging with the the bolt hole (103).

Description

A BUSH ASSEMBLY IN AN ALUMINUM WHEELFIELD

[0001] The embodiment herein generally relates to a bush assembly in a wheel. Specifically, the embodiment herein relates to a bush assembly in a bolt hole of a wheel disc in an aluminum wheel.BACKGROUND AND PRIOR ART

[0001] Aluminum is a light weight metal widely used in the manufacturing of wheel rims. Aluminum wheels have reduced weight thereby imparting efficiency and improving performance of the automobiles. The wheels with aluminum are manufactured in different types including single piece wheel assembly and multi piece rim and disc assembly.

[0002] Generally, wheel rims should be capable of withstanding continuous loads, wherein presence of small cracks can lead to irreparable damage. However, the wheel assemblies with an aluminum wheel disc are easily susceptible to damage, wherein particularly the bolt hole region is vulnerable to damage and cracks. Further, during the joining of the hub to the wheel disc the torque due to tightening of the bolts can affect the bolt hole region. The damage can include the bolt hole undergoing deformation or material chip off due to the torque.

[0003] Therefore, there is a need for an aluminum wheel imparting strength at bolt holes of the wheel disc. In particular, there is a need for an aluminum wheel with a bush assembly to support the bolt hole region.OBJECTS

[0004] Some of the objects of the present disclosure are described herein below:

[0005] A main object of the present disclosure is to provide a bush assembly for an aluminium wheel.

[0006] Another object of the present disclosure is to provide a steel bush assembly to be positioned in bolt hole in the disc of the aluminium wheel.

[0007] Yet another object of the present disclosure is to provide a bush assembly with an engagement means for engaging with the bolt hole of the aluminium wheel.

[0008] Still another object of the present disclosure is to provide bolt hole configuration in an aluminium wheel assembly to engage with a bush assembly.

[0009] The other objects and advantages of the present disclosure will be apparent from the following description when read in conjunction with the accompanying drawings, which are incorporated for illustration of preferred embodiments of the present disclosure and are not intended to limit the scope thereof.SUMMARY

[0010] In view of the foregoing, embodiments herein provide a bush assembly in an aluminum wheel.

[0011] In accordance with an embodiment, the bush assembly in an aluminum wheel, can comprise the following. A wheel disc of the aluminum wheel including a plurality of bolt holes wherein the bolt hole extend between a first edge on an outer surface of the wheel disc and a second edge on a inner surface of the wheel disc. The bush engages with an inner surface of the bolt hole, wherein the inner surface of the bolt hole including a cylindrical surface and an inclined surface. The bush can include a cylindrical portion, a transition portion, and a radial portion. The cylindrical portion of the bush engages with a length of the cylindrical surface of the bolt hole, the transition portion is inclined at an angle relative to the cylindrical portion, and provided for engaging with an inclined surface of the bolt hole. The radial portion is provided as a surface extendingradially inwards at an end of the transition portion, wherein the surface of the radial portion is perpendicular to the cylindrical portion. An outer edge of the radial portion engages with a peripheral edge of the inclined surface on a surface of the wheel disc. An engagement means provided circumferentially on an outer surface of the bush for engaging with the inner surface of the bolt hole.

[0012] In accordance with an embodiment, a hardness of a material of the bush is greater than a hardness of aluminum of the bolt hole. The inclined surface is inclined at an angle in a range of 0° to 90°outwards relative to the cylindrical surface. The angle of inclination of the transition portion relative to the cylindrical portion includes a range of 0° to 90°. A length of cylindrical portion of the bush includes a range of 3mm to a thickness of the wheel disc. A length of the cylindrical surface of the bolt hole includes a range of 3mm to a thickness of the wheel disc. A width of the radial portion includes a range of 5 mm to 20 mm.

[0013] In an embodiment, the engagement means can include a threading provided on the cylindrical portion of the bush, and the cylindrical surface of the bolt hole can include a threading for engaging with the threading of the bush.

[0014] In another embodiment, the engagement means can include a diameter of the cylindrical portion of the bush greater than a diameter of the cylindrical surface of the bolt hole for forming an interference fit between the bush and the bolt hole.

[0015] In another embodiment, the engagement means can include a plurality of serrations provided circumferentially at a predefined length on the cylindrical portion of the bush, wherein the predefined length includes a range of 3 mm to 20 mm, and wherein the serrations engage with the cylindrical surface of the bolt hole.

[0016] In an embodiment, the first edge is provided at a periphery of an end of the inclined surface, and the second edge is provided at a periphery of an end of the cylindrical surface. A diameter of the first edge is greater than a diameter of the second edge.

[0017] In another embodiment, the engagement means can include welding circumferentially at an interface between the outer edge of the peripheral portion and the first edge of the bolt hole.

[0018] In accordance with another embodiment, the inner surface of bolt hole can include the cylindrical surface between two inclined surfaces, wherein a first inclined surface extends between an end of the cylindrical surface and the first edge, and a second inclined surface extends between another end of the cylindrical surface and the second edge. An angle of inclination of the first inclined surface is equal to an angle of inclination of the second inclined surface. In an embodiment, the angle of inclination is selected from a range of 0° to 90°. A diameter of the first edge is equal to a diameter of the second edge of the bolt hole.

[0019] In an embodiment, two bushes including a first bush and a second bush engage with the bolt hole, wherein the cylindrical portion of the first bush and the second bush engage with the cylindrical surface of the bolt hole. The transition portion of the first bush engages with the first inclined surface, and the transition portion of the second bush engages with the second inclined surface. In an embodiment, a clearance of minimum 2mm is provided between an end of the first bush and an end of the second bush.

[0020] These and other aspects of the embodiments herein will be better appreciated and understood when considered in conjunction with the following description and the accompanying drawings. It should be understood, however,that the following descriptions, while indicating preferred embodiments and numerous specific details thereof, are given by way of illustration and not of limitation. Many changes and modifications may be made within the scope of the embodiments herein without departing from the spirit thereof, and the embodiments herein include all such modifications.BRIEF DESCRIPTION OF DRAWINGS

[0021] The detailed description is set forth with reference to the accompanying figures. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The use of the same reference numbers in different figures indicates similar or identical items.

[0022] Fig. 1 illustrates a sectional view of a bush assembly in an aluminum wheel, according to an embodiment herein;

[0023] Fig. 2A illustrates a perspective view of an aluminum wheel assembly including the bush, according to an embodiment herein;

[0024] Fig. 2B illustrates a magnified view of the bush in the aluminum wheel assembly, according to an embodiment herein;

[0025] Fig. 3A illustrates a (i) perspective exploded view and a (ii) sectional view of a multi-piece wheel assembly including the bush, according to an embodiment herein;

[0026] Fig. 3B illustrates a (i) perspective exploded view and a (ii) sectional view of a single-piece wheel assembly including the bush, according to an embodiment herein;

[0027] Fig. 4A illustrates a perspective view of a bush for an aluminum wheel, according to a first embodiment herein;

[0028] Fig. 4B illustrates a perspective exploded view of the aluminum disc and the bush, according to a first embodiment herein;

[0029] Fig. 4C illustrates a sectional view of the steel disc and the bush, according to a first embodiment herein;

[0030] Fig. 5A illustrates a perspective view of a bush for an aluminum wheel, according to a second embodiment herein;

[0031] Fig. 5B illustrates a perspective exploded view of the aluminum disc and the bush, according to a second embodiment herein;

[0032] Fig. 5C illustrates a perspective exploded view of the aluminum wheel assembly and the bush, according to a second embodiment herein;

[0033] Fig. 5D illustrates a sectional view of the steel disc and the bush, according to a second embodiment herein.

[0034] Fig. 6A illustrates a sectional view of two bushes in an aluminum wheel disc, according to a third embodiment herein;

[0035] Fig. 6B illustrates a sectional view of two bushes in an aluminum wheel disc, according to a fourth embodiment herein;

[0036] Fig. 6C illustrates a sectional view of two bushes in an aluminum wheel disc, according to a fifth embodiment herein;DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0037] The embodiments herein and the various features and advantageous details thereof are explained more fully with reference to the non-limiting embodiments and detailed in the following description. Descriptions of well- known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practicethe embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.

[0038] As mentioned above, there is a need for an aluminum wheel assembly with strength at bolt holes of the wheel disc. In particular, there is a need for an aluminum wheel with a bush assembly to support the bolt hole region. The embodiments herein achieve this by providing “A bush assembly in an aluminum wheel”. Referring now to the drawings, FIGS. 1 through 6C, where similar reference characters denote corresponding features consistently throughout the figures, there are shown preferred embodiments.

[0039] Fig. 1 illustrates a sectional view of a bush assembly in an aluminum wheel. In an embodiment, an aluminum wheel assembly 100 is provided. The aluminum wheel assembly can include a rim 101, a disc 102, a bolt hole 103, and a bush 104. The bush 104 is inserted inside the bolt hole 103, wherein the bush 104 is engaged with the bolt hole 103.

[0040] In an embodiment, the bolt hole 103 can extend between a first edge 103c and a second edge lOd. The first edge 103c is at an outer surface of the wheel disc 102 and the second edge 103d is at an inner surface of the wheel disc 102. The bolt hole 103 include an inner surface extending circumferentially. The inner surface can include a cylindrical surface 103a, and an inclined surface 103b.

[0041] The cylindrical surface 103a can include a length in a range of 3mm to a thickness of the wheel disc. In an embodiment, the length can be selected based on application severity including type of wheel, type of automobile. The inclined surface 103b can be inclined at an angle outwards relative to the cylindrical surface 103a. The angle can include a range of 0° to 90°. The first edge 103c is formed at a periphery of an end of the inclined surface 103b. The second edge103d is formed at a periphery of an end of the cylindrical surface 103a. A diameter of the first edge is greater than a diameter of the second edge.

[0042] In an embodiment, the bush 104 can include a cylindrical portion 104a, a transition portion 104b, and a radial portion 104c. A length of the cylindrical portion 104a can include a range of 3mm to a thickness of the wheel disc. The length of the bush 104 can be based on application. In an exemplary embodiment, for reducing total weight of the wheel, the length of the bush can be less than the length of the cylindrical surface 103a of the bolt hole. For improving load distribution, the length of the cylindrical portion 104a can be equal to the length of the cylindrical surface 103a of the bolt hole for increase contact surface, thereby improving fatigue life of the bolt hole region.

[0043] The transition portion 104b is inclined at an angle relative to the cylindrical portion 104a. The angle can include a range of 0° to 90°.

[0044] The radial portion 104c is provided as a surface extending radially inwards at an end of the transition portion 104b. The surface of the radial portion 104c perpendicular to the cylindrical portion 104a. The surface of the radial portion 104c can be to an outer surface of the disc. A width ‘W’ of the radial portion can include dimensions in a range of 5mm to 20mm. An outer edge of the radial portion 104c can engage with the first edge 103c of the bolt hole.

[0045] In an embodiment, a material of the bush can include a hardness greater than Aluminum (material of the disc). The material of the bush can include but not limited to steel.

[0046] In an embodiment, an engagement means can be provided circumferentially on the cylindrical portion 104a of the bush 104 for engaging the cylindrical portion 104a to the cylindrical surface 103a of the bolt hole 103. Theengagement means can include but not limited to interference fit, welding, serrations, and threading.

[0047] In an embodiment, wherein the engagement means is an interference fit, a diameter of the cylindrical portion 104a of the bush 104 is greater than a diameter of the cylindrical surface 103a of the bolt hole 103. The dimensions of the diameter of the bush 104 can be configured based on conventional dimensions for an interference fit. Thereby, the bush 104 is press fitted in the bolt hole 103.

[0048] In another embodiment, wherein the engagement means is welding, the welding is provided at an interface between the bush and the bolt hole. The welding is performed circumferentially at an interface between the bush 104 and the bolt hole 103, In an embodiment, the welding is performed circumferentially at the interface between an outer edge of the radial portion 104c of the bush 104 and the first edge 103 c of the bolt hole 103. A type of the welding can include but not limited to TIG welding, MIG welding, friction welding, and welding suitable for Aluminum.

[0049] Fig. 2A illustrates a perspective view of an aluminum wheel assembly including the bush. The aluminum wheel assembly can include the rim 101, the disc 102, and plurality of bushes 103 positioned in the bolt holes of the disc 102.

[0050] Fig. 2B illustrates a magnified view of the bush in the aluminum wheel assembly. The disc 102 includes the bush 104 positioned in the bolt hole. The bush 104 can include the radial portion 104c extending on a surface along the outer surface of the disc of the wheel. The radial portion 104c engages with the first edge 103 c of the bolt hole 103.

[0051] Fig. 3 A (i) illustrates a perspective exploded view of a multi-piece wheel assembly including the bush. The bush can engage with the bolt hole in the disc of the multi-piece assembly. Fig. 3 A (ii) illustrates a sectional view of a multi-piecewheel assembly including the bush. The bush engages with the bolt hole in the disc of the multi-piece assembly.

[0052] Fig. 3B (i) illustrates a perspective exploded view of a single-piece wheel assembly including the bush. The bush can engage with the bolt hole in the disc of the multi-piece wheel assembly. Fig. 3B (ii) illustrates a sectional view of a multi -piece wheel assembly including the bush 104. The bush 104 engages with the bolt hole 103 in the disc of the single-piece wheel and disc assembly. The single-piece wheel and disc assembly can include the disc integrated with the wheel rim.

[0053] Fig. 4A illustrates a perspective view of a bush for an aluminum wheel, according to a first embodiment. The bush 104 can included the engagement means 401 provided on the outer surface of the cylindrical portion 104a. The engagement means can include a threading 401. Fig. 4B illustrates a perspective exploded view of the aluminum disc and the bush, according to the first embodiment. The cylindrical surface 103a of the bolt hole 103 can include a threading 402 provided for engaging with the threading 401 of the bush. Fig. 4C illustrates a sectional view of the steel disc and the bush, according to the first embodiment. The threading 401 of the bush 104 is engaged with the threading 402 of the bolt hole 103 for joining the bush 104 to the bolt hole 103.

[0054] Fig. 5A illustrates a perspective view of a bush for an aluminum wheel, according to a second embodiment. The bush can included the engagement means 501 provided at a predefined length on the cylindrical portion 104a. The predefined length can include a range of 3mm to 20mm .The engagement means can include a plurality of serrations 501 extending circumferentially. Fig. 5B illustrates a perspective exploded view of the aluminum disc and the bush, according to the second embodiment. The serrations 501 provided on thecylindrical portion can engage with the cylindrical surface of the bolt hole, thereby engaging the bush to the bolt hole. Fig. 5C illustrates a perspective exploded view of the aluminum wheel assembly and the bush, according to the second embodiment. Fig. 5D illustrates a sectional view of the steel disc and the bush, according to the second embodiment. The bush with serrations is engaged in the bolt hole.

[0055] Fig. 6A illustrates a sectional view of two bushes in a bolt hole of an aluminum wheel disc, according to a third embodiment. The aluminum wheel is a dual wheel utilized for dual mounting applications in trucks and buses.

[0056] In an embodiment, the bolt hole 601 can extend between the first edge 602a and the second edge 602b. The inner surface of the bolt hole 601 can include a cylindrical surface 601a, a first inclined surface 601b, and a second inclined surface 601c. The cylindrical surface 601 is provided between the first inclined surface 601b and the second inclined surface 601c. The first inclined surface 601b can extend between an end of the cylindrical surface 601a and the first edge 602a of the bolt hole 601. The second inclined surface 601c can extend between another end of the cylindrical surface 601a and the second edge 602b of the bolt hole 601. The angle of inclination of the first inclined surface 601b is equal to an angle of inclination of the second inclined surface 601c.

[0057] In an embodiment, the angle of inclination can include a range of 0° to 90°.

[0058] In an embodiment, each of the bushes 104 can include the cylindrical portion 104a, the transition portion 104b, and the radial portion 104c.

[0059] The transition portion 104b of the first bush can engage with the first inclined surface 601b. The transition portion 104b of the second bush can engage with the second inclined surface 601c. The cylindrical portion 104a of the firstbush and the second bush can engage with the cylindrical surface of the bolt hole 103. The engagement means can include an interference fit.

[0060] Fig. 6B illustrates a sectional view of two bushes in an aluminum wheel disc, according to a fourth embodiment. The aluminum wheel is a dual wheel utilized for dual mounting applications in trucks and buses. The bolt can include flat faced flange type of bolt nuts.

[0061] In an embodiment, the bolt hole 605 can extend between the first edge 606a and the second edge 606b. The inner surface of the bolt hole 605 can include a cylindrical surface 605a, a first inclined surface 605b, a second inclined surface 605c. The cylindrical surface 605a can be provided between the first inclined surface 605b and the second inclined surface 605c.

[0062] The first inclined surface 605b can extend between an end of the cylindrical surface 605a and the first edge 606a of the bolt hole 605. The second inclined surface 605c can extend between another end of the cylindrical surface 605a and the second edge 606b of the bolt hole 605. In an embodiment, the first inclined surface 605b and the second inclined surface 605c are inclined at an angle of 90° relative to the cylindrical surface 605a.

[0063] In an embodiment, each of the bushes 104 can include the cylindrical portion 104a, the transition portion 104b, and the radial portion 104c.

[0064] The transition portion 104b of the first bush can engage with the first inclined surface 606b. The transition portion 104b of the second bush can engage with the second inclined surface 606c. The cylindrical portion 104a of the first bush and the second bush can engage with the cylindrical surface of the bolt hole 103. The engagement means can include an interference fit.

[0065] In an embodiment, a clearance of minimum 2mm can be provided between an end of the first bush and the second bush.

[0066] Fig. 6C illustrates a sectional view of two bushes in an aluminum wheel disc, according to a fifth embodiment. The aluminum wheel is a dual wheel utilized for dual mounting applications in trucks and buses. The bolt can include flat faced flange type of bolt nuts.

[0067] In an embodiment, the bolt hole 610 can extend between the first edge 611a, and the second edge 611b. The inner surface of the bolt hole 610 can include a cylindrical surface 610a provided between a first inclined surface 610b and a second inclined surface 610c.

[0068] The first inclined surface 610b can extend between an end of the cylindrical surface 610a and the first edge 611a of the bolt hole 610. The second inclined surface 610c can extend between another end of the cylindrical surface 610a and the second edge 61 lb of the bolt hole 610.

[0069] In an embodiment, the first inclined surface 610b and the second inclined surface 610c are inclined at an angle of 90° relative to the cylindrical surface 610a.

[0070] In an embodiment, each of the bushes 104 can include the cylindrical portion 104a, the transition portion 104b, and the radial portion 104c.

[0071] The transition portion 104b of the first bush can engage with the first inclined surface 610b. The transition portion 104b of the second bush can engage with the second inclined surface 610c.

[0072] The cylindrical portion 104a of the first bush and the second bush can engage with the cylindrical surface of the bolt hole 103. The cylindrical surface of the bolt hole 103 can include threading for engaging with the threading provided on the cylindrical portion 104a of the first bush and the second bush.

[0073] In an embodiment, a clearance of minimum 2mm can be provided between an end of the first bush and the second bush.

[0074] A main advantage of the present disclosure is that the bush assembly provided in the present invention is capable of preventing material deformation of the bolt hole.

[0075] Another advantage of the present disclosure is that the bush assembly in is capable of imparting strength to the bolt hole of the aluminum disc for preventing damage due to torque during tightening of the bolts.

[0076] Yet another advantage of the present disclosure is that the bush with engagement means including threading can be utilized in light weight vehicle wheels for facilitating easy removal of the bush during multiple replacements, causing no damage to the wheels.

[0077] Still another advantage of the present disclosure is that the bush with engagement means including serrations can be utilized in medium duty vehicles for imparting stability on the assembly.

[0078] Yet another advantage of the present disclosure is that the bush with engagement means including welding can be utilized for higher precision required in high-speed applications where the bushes are permanently fixed.

[0079] Still another advantage of the present disclosure is that the bolt hole of the aluminum disc facilitates easy removal and assembly of the bushes and bolts.

[0080] Yet another advantage of the present disclosure is that the bolt hole in the aluminum disc is configured engaging with a steel bush to prevent damage during tightening of bolts.

[0081] Still another advantage of the present disclosure is that the plurality of embodiments of the bushes can be utilized based on application severity includingtype of automobile, type of wheel and thereby providing effective protection to the aluminum disc.

[0082] Still another advantage of the present disclosure is that the bushes can be used in dual mounting application on trucks and buses where the same wheel is used in front steering axle and on the rear drive axle having dual mounting.

[0083] The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and / or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.

Claims

We claim:

1. A bush assembly in an aluminum wheel, comprising: a wheel disc (102) of the aluminum wheel including a plurality of bolt holes (103, 601, 605, 610); wherein the bolt hole (103, 601, 605, 610) extending between a first edge (103c, 602a, 606a, 611a) on an outer surface of the wheel disc (102) and a second edge (103d, 602b, 606b, 611b) on an inner surface of the wheel disc (102); the bush (104) engaging with an inner surface of the bolt hole (103, 601, 605, 610); wherein the inner surface of the bolt hole (103) including a cylindrical surface (103a) and an inclined surface (103b); wherein the bush (104) including a cylindrical portion (104a), a transition portion (104b), and a radial portion (104c); the cylindrical portion (104a) of the bush (104) engaging with a length of the cylindrical surface (103b) of the bolt hole (103); the transition portion (104b) inclined at an angle relative to the cylindrical portion (104a), and provided for engaging with an inclined surface (103c) of the bolt hole (103); the radial portion (104c) provided as a surface extending radially inwards at an end of the transition portion (104b), wherein the surface of the radial portion (104c) perpendicular to the cylindrical portion (104a), wherein an outer edge of the radial portion (104c) engaging with the first edge (103 c) of the bolt hole on the wheel disc; and an engagement means provided circumferentially on an outer surface of the bush (104) for engaging with the inner surface of the bolt hole (103).

2. The bush assembly as claimed in claim 1, wherein the engagement means including a threading (401) provided on the cylindrical portion (104a) of the bush (104), and the cylindrical surface (103a) of the bolt hole (103) including a threading (402) for engaging with the threading (401) of the bush (104).

3. The bush assembly as claimed in claim 1, wherein the engagement means including: a diameter of the cylindrical portion (104a) of the bush (104) greater than a diameter of the cylindrical surface (103a) of the bolt hole for forming an interference fit between the bush (104) and the bolt hole (103).

4. The bush assembly as claimed in claim 1, wherein the engagement means including: plurality of serrations (501) provided circumferentially at a predefined length on the cylindrical portion (104a) of the bush (104), wherein the predefined length including a range of 3 mm to 20 mm, and wherein the serrations (501) engaging with the cylindrical surface (103a) of the bolt hole.

5. The bush assembly as claimed in claim 1, wherein the first edge (103c) at a periphery of an end of the inclined surface (103b), and the second edge (103 d) at a periphery of an end of the cylindrical surface (103d), and wherein a diameter of the first edge (103c) is greater than a diameter of the second edge (103d).

6. The bush assembly as claimed in claim 1, wherein the engagement means including welding circumferentially at an interface between the outer edge of the peripheral portion and the first edge of the bolt hole.

7. The bush assembly as claimed in claim 1, wherein the inner surface of bolt hole (601, 605, 610) including the cylindrical surface (601b) between two inclined surfaces (601b, 601c), wherein a first inclined surface (601b) extending between an end of the cylindrical surface (601a) and the first edge (602a), and a second inclined surface (602b) extending between another end of the cylindrical surface (601a) and the second edge (602b), and wherein an angle of inclination of the first inclined surface (601b) equal to an angle of inclination of the second inclined surface (601c).

8. The bush assembly as claimed in claim 7, wherein the angle of inclination selected from a range of 0° to 90°.

9. The bush assembly as claimed in claim 7, wherein a diameter of the first edge (602a) equal to a diameter of the second edge (602b) of the bolt hole (601).

10. The bush assembly as claimed in claim 7, wherein two bushes (104) including a first bush and a second bush engaging with the bolt hole (601), wherein cylindrical portion (104a) of the first bush (104) and the second bush engaging with the cylindrical surface (103a) of the bolt hole (103). wherein the transition portion (104c) of the first bush (104) engaging with the first inclined surface (601b), and the transition portion (104c) of the second bush (104) engaging with the second inclined surface (602c).

11. The bush assembly as claimed in claim 10, wherein a clearance provided between an end of the first bush (104) and an end of the second bush (104), and wherein the clearance including a minimum of 2 mm.

12. The bush assembly as claimed in claim 1, wherein a hardness of a material of the bush greater than a hardness of aluminum of the bolt hole.

13. The bush assembly as claimed in claim 1, wherein the inclined surface (103b) inclined at an angle outwards relative to the cylindrical surface (103a), and wherein the angle including a range of 0° to 90°.

14. The bush assembly as claimed in claim 1, wherein the angle of inclination of the transition portion (104b) relative to the cylindrical portion (104a) including a range of 0° to 90°.

15. The bush assembly as claimed in claim 1, wherein a length of cylindrical portion (104a) of the bush (104) including a range of 3mm to a thickness of the wheel disc, and wherein a length of the cylindrical surface (103a) of the bolt hole (103) including a range of 3mm to a thickness of the wheel disc.

16. The bush assembly as claimed in claim 1, wherein a width of the radial portion (104c) including a range of 5 mm to 20 mm.

Images