Hybrid control arm for vehicle

Abstract

The present invention relates to a hybrid control arm for a vehicle, which is light in weight and high in rigidity by combining a metal material main body and a reinforcing material of a composite resin material. A hybrid control arm for a vehicle according to the present invention comprises: a metal material body 100 including an upper wall and a side wall; and a reinforcing material 200 of a composite resin material formed in the main body by insert injection molding. Furthermore, the present invention is provided with: a flange (106) which is formed so as to be circularly curved at the tip of the side wall; a recess 124 formed in a shape protruding toward the outer surface while being recessed on the inner surface of the side wall; and a reinforcing buckle 218 which is a part of the reinforcing material, is integrally connected so as to surround the inner surface of the side wall, the flange, and the outer surface of the side wall, and is embedded with a recess. According to the control arm of the present invention, since the bonding structure of the metal material main body and the composite resin material reinforcing material becomes firm, the material of the reinforcing material is minimized, thereby achieving light weight and satisfying specified rigidity.

Description

Technical Field

[0001] The present invention relates to a hybrid control arm for a vehicle, and more particularly, to a hybrid control arm for a vehicle that is lightweight and has high rigidity by combining a main body of a metal material and a reinforcement material of a composite resin material. Background Art

[0002] Generally speaking, a suspension arm is a member that functions as an arm for adjusting the movement of a wheel, and is also called a control arm, and is connected to an axle through a ball joint, a bushing, etc. Such a control arm may be formed into a pair of upper and lower arms, with the upper control arm being called an upper arm and the lower control arm being called a lower arm.

[0003] Conventional control arms are mainly made of metal materials. However, recently, control arm structures that satisfy predetermined rigidity while reducing weight have become common for the purpose of reducing the weight of vehicles.

[0004] Therefore, in Korean Patent Authorization No. 10-1393849 and Korean Patent Publication No. 10-2012-0105470, a plastic insert molding is combined with a main body of a metal material to provide a low-weight, high-rigidity suspension arm.

[0005] However, in the above-mentioned prior art, when the plastic insert is cooled after injection molding, the insert molding of the plastic material having a larger shrinkage rate than steel shrinks more than the arm body, thereby generating a gap between the arm body and the plastic insert molding, which results in reducing the overall strength of the arm body.

[0006] In addition, due to the bending of the metal arm, the mold used for plastic insert molding may not match accurately, resulting in a part that is not insert molded or flash that is generated, which reduces the quality. In addition, the paint on the part where the arm contacts the mold falls off, so there is also the problem of subsequent corrosion of the contact part by rainwater, etc.

[0007] On the other hand, in order to avoid the problem caused by the incorrect matching of the arm body and the mold, there is also a method of injecting the reinforcing material onto the entire surface of the arm body or filling the entire bottom surface of the inner side of the arm body. However, this method has the problem of unnecessarily requiring too much reinforcing material, which inhibits the realization of lightweighting. Summary of the invention

[0008] Problems to be solved by the invention

[0009] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a hybrid control arm for a vehicle having a strong structure by combining a metal material main body and a composite resin material reinforcement.

[0010] Another object of the present invention is to provide a hybrid control arm for a vehicle having a main body structure that can easily match with an insert injection mold and allow injection melt of a reinforcing material to flow uniformly.

[0011] Solutions for solving problems

[0012] A hybrid control arm for a vehicle according to an embodiment of the present invention for achieving the above-mentioned purpose comprises: a main body made of a metal material, which includes an upper wall and two opposite side walls bent downward from the upper wall and has a shape with an open lower side; and a reinforcing material made of a composite resin, which is formed in the main body by insert injection molding, thereby filling at least a portion of the main body.

[0013] Furthermore, it includes: a flange, which is formed at the ends of the two side walls in a circular shape along the direction of widening the opening of the main body; at least one recess, which is formed in a shape that is recessed on the inner surface of the side wall and protrudes toward the outer surface; and a reinforcing buckle, which is a part of the reinforcing material and is integrally connected in a manner of surrounding the inner surface of the side wall, the flange and the outer surface of the side wall, and is filled with the recess.

[0014] The recess is arranged adjacent to a curved portion where the side wall and the flange are connected.

[0015] The above-mentioned recess is also provided with a connecting hole, which is formed in the central part of the above-mentioned recess in a manner of penetrating the inner surface and the outer surface of the above-mentioned recess; the above-mentioned reinforcing material is connected to the inner and outer parts of the above-mentioned side wall through the above-mentioned connecting hole.

[0016] The reinforcing material includes a reinforcing grid having reinforcing ribs obliquely crossing the inner surfaces of the two side walls and crossing in an "X" shape, and does not fill the lower surface of the upper wall.

[0017] The plurality of reinforcement grids are connected in one piece, and in adjacent reinforcement grids, the ends of the reinforcement ribs are connected by the reinforcement buckles.

[0018] Furthermore, the invention comprises: at least one fixing hole which is formed vertically through the upper wall; and a button which is a part of the reinforcing material and is formed on the upper surface of the upper wall through the fixing hole.

[0019] The fixing hole and the button are arranged to correspond to the intersection of the reinforcing ribs.

[0020] Furthermore, the side wall is formed to be inclined at 2 to 5 degrees in an outer direction of the width of the upper wall with reference to a perpendicular line to the upper wall.

[0021] And, it includes: a first connection part, which passes through one side of the main body from top to bottom; and a ball joint, which is combined with the first connection part.

[0022] The above-mentioned spherical joint includes: a bracket, which is combined with the above-mentioned first connecting part and is connected up and down to form a first opening part and a second opening part; a ball pin, which includes a ball part and a pin part, and the above-mentioned ball part is accommodated in the above-mentioned bracket; and a spherical seat, which is formed in the space between the above-mentioned bracket and the above-mentioned ball part by insert injection molding and covers the above-mentioned first opening part.

[0023] The spherical seat and the reinforcing material are injection molded simultaneously, and the spherical seat is formed to be separated from the reinforcing material by injecting a composite resin melt through a spherical seat gate provided separately from a gate of the reinforcing material.

[0024] Furthermore, the spherical joint further includes a ball bearing which surrounds the spherical portion so as to enable the spherical portion to freely rotate within the operating angle range of the ball stud and is accommodated in the bracket.

[0025] The ball bearing includes: a lubricating sheet surrounding a portion of the ball portion; a cover covering a non-spherical portion at the end of the ball portion and formed integrally with the lubricating sheet; and a fixing wing protruding radially from an outer spherical surface of the lubricating sheet and supported on an inner surface of the bracket.

[0026] The spherical seat is formed in a space between the bracket and the ball bearing by insert molding, and covers the first opening and the second opening.

[0027] According to another embodiment of the hybrid control arm for a vehicle, at least one molded protrusion is provided on the side wall instead of the recess, and the molded protrusion is formed by cutting a portion of the side wall and then bending the cut portion toward the inside or outside to protrude.

[0028] Alternatively, at least one molding protrusion is provided on the upper wall instead of the fixing hole, and the molding protrusion is formed by cutting a part of the upper wall and then bending the cut part toward the inside or outside to protrude.

[0029] Effects of the Invention

[0030] The hybrid control arm for a vehicle according to the present invention has a reduced overall weight compared to the conventional one made of steel material, and can be lightweight, thereby having a significant effect of reducing the weight of the vehicle and improving fuel efficiency.

[0031] Furthermore, the main body and the reinforcing material are tightly combined through the buttons and fixing clips of the reinforcing material, thereby having a strong combined structure, and forces such as load and stress are evenly dispersed throughout the control arm, thereby having a significant effect of ensuring maximum rigidity relative to weight.

[0032] Furthermore, the possibility of buckling of the main body in the concave portion is reduced. In addition, the surrounding of the reinforcing material connected through the connecting hole of the main body side wall is reinforced by the reinforcing material filling the above-mentioned concave portion, thereby minimizing stress and having a stronger bonding structure, thereby having a significant effect of increasing the durability of the control arm.

[0033] Furthermore, since the main body and the reinforcing material have a very strong bonding structure, the unnecessary area of ​​the reinforcing material that was previously filled on the entire surface in order to increase the contact area between the main body and the reinforcing material can be removed, thereby having a significant effect of reducing manufacturing costs.

[0034] Furthermore, when insert molding a composite resin reinforcement, the matching between the main body and the mold is improved, thereby significantly suppressing the generation of unmolded parts or flash in the reinforcement. Furthermore, the problem of paint peeling at the contact point between the main body and the mold is solved, thereby significantly suppressing durability-reducing factors such as corrosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 and Figure 2 4 is a perspective view of a hybrid control arm for a vehicle according to a preferred embodiment of the present invention.

[0036] Figure 3 Only shows Figure 1 A perspective view of a main body in a hybrid control arm for a vehicle is shown in FIG.

[0037] Figure 4 The direction of the arrow indicates the Figure 3 A cross-section diagram of the AA line in FIG.

[0038] Figure 5 The direction of the arrow indicates the Figure 3 A cross-section diagram of line BB in FIG.

[0039] Figure 6 yes Figure 2 Enlarged view of part "A".

[0040] Figure 7 FIG. 1 is a partial perspective view showing a molded protrusion constituting a hybrid control arm for a vehicle according to another embodiment of the present invention.

[0041] Figure 8 is a partial cross-sectional view of a ball joint combined with a hybrid control arm for a vehicle according to a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0042] Hereinafter, the preferred embodiment of the hybrid control arm for a vehicle according to the present invention will be described with reference to the accompanying drawings. For the control arm for a vehicle according to the present disclosure, the above control arm is described as an example in the following description, but it is not limited thereto and can also be applied to the lower control arm.

[0043] Figure 1 and Figure 2 4 is a perspective view of a hybrid control arm for a vehicle according to a preferred embodiment of the present invention.

[0044] Reference Figure 1 and Figure 2 , the control arm 10 according to the present invention includes a main body 100 of a metal material and a reinforcement material 200 of a composite resin material.

[0045] The main body 100 may be formed in a “U” shape, for example.

[0046] The main body 100 includes an upper wall 102 and two opposite side walls 104 bent downward from the upper wall 102, and is formed in a shape with an open lower side. Such a main body 100 may be formed as an integral structure by stamping a plate of a metal material.

[0047] The main body 100 may be made of steel or non-ferrous metal material.

[0048] The reinforcing material 200 is formed in a form of being integrated into the main body 100 by insert injection molding. That is, the reinforcing material 200 at least fills a portion of the space between the upper wall 102 and the side wall 104 .

[0049] The reinforcing material 200 may be, for example, a composite resin material in which glass fiber or carbon fiber is added to polyamide or polyoxymethylene resin.

[0050] The reinforcing material 200 may be configured as a lattice structure to achieve weight reduction. Also, a portion of the reinforcing material 200 may be configured as a structure surrounding the inside and outside of the side wall 104 .

[0051] First, the detailed structure of the main body 100 will be described with reference to the drawings.

[0052] Figure 3 Only shows Figure 1 A perspective view of a main body in a hybrid control arm for a vehicle shown in FIG. Figure 4 The direction of the arrow indicates the Figure 3 The cross-section diagram of the AA line in Figure 5 The direction of the arrow indicates the Figure 3 A cross-section diagram of line BB in FIG.

[0053] Reference Figure 3 The main body 100 is composed of The shape is formed, and a first connection part 112 is provided at the front center, and a second connection part 114 is provided at the rear. The first connection part 112 is a part of the ball joint 300 provided for connecting a connecting part connected to the wheel side of the vehicle, and the second connection part 114 is a part of a bushing provided for connecting a connecting part connected to the vehicle body side, which can be connected to the main body 100 by welding.

[0054] And, refer to Figure 4 In the main body 100 , the upper wall 102 and the side wall 104 are integrally connected and have an open lower side. Also, a flange 106 is integrally formed at the end of the side wall 104 , and the flange 106 is formed to be rounded in a direction to widen the opening of the main body 100 .

[0055] As described above, preferably, the upper wall 102 , the side wall 104 , and the flange 106 are formed into an integral structure by stamping a substantially U-shaped metal plate.

[0056] Furthermore, the upper wall 102 is provided with at least one fixing hole 122 which is formed through the upper wall 102. The fixing hole 122 guides a part of the composite resin melt to flow out from the lower surface of the upper wall 102 to the upper surface when the reinforcing material 200 is formed by injection molding.

[0057] Therefore, the reinforcing material 200 flows out through the fixing holes 122 to the upper surface of the upper wall 102 in a molten state, and then forms buttons 216 while being cooled. The buttons 216 prevent the reinforcing material 200 from being separated from the main body 100.

[0058] In order to achieve a firm combination of the main body 100 and the reinforcing material 200 , it is most preferred that a plurality of the fixing holes 122 are provided along the length direction of the upper wall 102 .

[0059] The side walls 104 are formed to be inclined 2 to 5 degrees outward of the width of the upper wall 102 with reference to a vertical line with the upper wall 102. That is, the width between the side walls 104 increases from the upper wall 102 side toward the flange 106 side.

[0060] When the structure is set according to the angle of the side wall 104, when a mold is used to form the reinforcing material 200 in the main body 100 by insert molding, the mold can be naturally inserted along the inclination of the side wall 104. In addition, the composite resin melt naturally flows into the main body 100 along the inclination of the side wall 104.

[0061] Furthermore, the side wall 104 is also provided with a dimple 124 as a component for preventing the reinforcing material 200 from being separated.

[0062] Reference Figure 5 The dimple 124 is formed in a shape that the inner surface of the side wall 104 is recessed and protrudes toward the outer surface of the side wall 104. Specifically, the dimple 124 is formed in the form of a hemispherical surface or a partial spherical surface. That is, the dimple 124 has a shape that is formed by pressurizing the inner surface of the side wall 104 with a hemispherical surface or a partial spherical surface and protrudes toward the outside, and is formed by a dimple structure in which the inner surface is recessed and the outer surface is protruding.

[0063] Therefore, the reinforcing material 200 is filled into the concave space of the dimple 124 in a molten state, and then forms a protruding portion that matches the concave shape of the dimple 124 while cooling. Due to the combined shape of the dimple 124 of the main body 100 and the protruding portion of the reinforcing material 200, they are firmly fixed in the plane coordinates X and Y directions, so that the combination of the main body 100 and the reinforcing material 200 is more firmly achieved.

[0064] Preferably, the border of the recess 124, that is, the boundary between the recess 124 and the side wall 104, is formed as a smooth and soft curved surface, so that the composite resin melt forming the reinforcing material 200 can flow softly into the recess 124 without generating eddy currents.

[0065] On the other hand, the flange 106 is buried in the reinforcing member 200. As described above, a part of the reinforcing member 200 is configured to surround the inner surface of the side wall 104, the flange 106, and the outer surface of the side wall 104 and integrally connect them.

[0066] Therefore, after the reinforcing material 200 is insert-molded in the main body 100, it shrinks when cooled, thereby exerting a force to pull the flange 106 toward the inside of the main body 100, that is, in the direction opposite to the bending direction of the flange 106, making the combination of the main body 100 and the reinforcing material 200 stronger.

[0067] More specifically, the flange 106 is embedded in a reinforcing buckle 218, which is described later and constitutes a part of the reinforcing material 200. The reinforcing buckle 218 constitutes a part of the reinforcing material 200 and is integrally connected in a manner of surrounding the inner surface of the side wall 104, the flange 106, and the outer surface of the side wall 104. The specific shape of the reinforcing buckle 218 will be described again when the detailed structure of the reinforcing material 200 is described later.

[0068] Furthermore, the dimple 124 is disposed adjacent to the curved portion where the side wall 104 and the flange 106 are connected. Therefore, in the structure where the reinforcing material 200 surrounds the inner surface of the side wall 104, the flange 106, and the outer surface of the side wall 104, the dimple 124 is also buried in the reinforcing material 200.

[0069] Furthermore, a connecting hole 126 is provided in the central portion of the recess 124 and is formed to penetrate through the inner surface and the outer surface of the recess 124 .

[0070] Furthermore, the reinforcing material 200 is connected to the inner and outer sides of the side wall 104 through the connecting holes 126. That is, it is connected between the reinforcing buckles 218 surrounding the inner and outer sides of the recess 124. Therefore, a portion of the reinforcing material 200 is solidified while passing through the connecting holes 126, thereby preventing the reinforcing material 200 from being separated from the open side of the main body 100.

[0071] Next, refer to Figure 1 , Figure 2 and Figure 6 The detailed structure of the reinforcing material 200 will be described. Figure 6 yes Figure 2 Enlarged view of part "A".

[0072] Reference Figure 2 and Figure 6 The reinforcing material 200 includes a reinforcing grid 210, wherein the reinforcing grid 210 has reinforcing ribs 212 and 214 that obliquely cross the inner surfaces of the two side walls 104 and cross in an "X" shape, and does not fill the lower surface of the upper wall 102. In addition, the reinforcing material 200 is composed of a structure in which a plurality of reinforcing grids 210 (210-1 to 210-n) are connected as one.

[0073] In the adjacent reinforcing grids 210-1 and 210-2, the ends of the reinforcing ribs 212-1 and 214-2, 214-1 and 212-2 are connected by abutting against the inner surface of the side wall 104. Therefore, the adjacently connected reinforcing ribs 212-1 and 214-2 and the side wall 104 form a triangular structure, thereby having a stronger supporting force.

[0074] In addition, a reinforcement buckle 218 in the form of a part of the reinforcement material 200 surrounding the end of the main body 100 is provided at the connection portion between the reinforcement grids 210 - 1 and 210 - 2 .

[0075] The reinforcing buckle 218 includes an inner wall 218a formed in a planar shape to increase the adhesion to the side wall 104, and an outer wall 218b, the upper end of which is integrally connected to the inner wall 218a to surround the flange 106 and is combined with the outer surface of the side wall 104, and is Font.

[0076] Preferably, the height of the outer wall 218b is lower than the height of the inner wall 218a. The shape is formed so as to improve the fixing force of the reinforcing material 200 by integrally surrounding the inner surface of the side wall 104 , the flange 106 , and the outer surface of the side wall 104 in a part of the body 100 .

[0077] As described above, the recess 124 is embedded in the reinforcing buckle 218. Therefore, even in a structure where a portion of the reinforcing material 200 is combined with the main body 100, the combining force can be supplemented by combining with the recess 124.

[0078] At the same time, the inner wall 218a and the outer wall 218b are integrally connected via a connection hole 126 penetrating through the recess 124, thereby being very firmly combined.

[0079] The upper surface of the reinforcing material 200 is bonded to the lower surface of the upper wall 102, and the reinforcing material 200 is formed in a lattice shape and does not fill the entire lower surface of the upper wall 102. In addition, the height of the reinforcing ribs 212 and 214 is higher than the height from the lower surface of the upper wall 102 to the lower surface of the flange 106 by more than 3 mm. In other words, the lower surface of the reinforcing material 200 protrudes more than 3 mm higher than the lower surface of the flange.

[0080] For the side surface of the reinforcing material 200 , only the inner wall 218 a of the reinforcing buckle 218 is engaged with the inner surface of the side wall 104 and does not fill the entire side wall 104 .

[0081] On the other hand, it is most preferred that the intersection 213 of the ribs 212 and 214 is located at the middle point in the width direction of the side wall 104. Therefore, the force of the reinforcing material 200 supporting the side wall 104 can be balanced. In addition, if the injection gate is arranged at the intersection 213 of the ribs 212 and 214, the flow speed of the composite resin melt in each part becomes uniform, thereby improving the quality of the reinforcing material 200 as an injection molded object.

[0082] Furthermore, the fixing hole 122 of the upper wall 102 is arranged to correspond to the intersection 213 of the reinforcing ribs 212 and 214. That is, the button 216 passing through the fixing hole 122 is provided at the intersection 213.

[0083] Some of the fixing holes 122 may be used as injection gates for the reinforcing material 200 .

[0084] Figure 7 1 is a partial perspective view showing a molded protrusion 128 constituting a hybrid control arm 10 for a vehicle according to another embodiment of the present invention.

[0085] The molded protrusion 128 may replace the above-mentioned recess 124 or the above-mentioned fixing hole 122 .

[0086] Reference Figure 7 The molding protrusion 128 is formed on the side wall 104 in a manner that a portion of the side wall 104 is cut and then the cut portion is bent and protruded toward the inside or outside. This molding protrusion 128 replaces the recess 124 and is therefore buried in the reinforcing buckle 218.

[0087] Alternatively, the molded protrusion 128 may be provided on the upper wall 102 instead of the fixing hole 122 and buried in the button 216 .

[0088] As described above, the control arm 10 according to the present invention is manufactured by forming the reinforcement material 200 of the composite resin material in the main body 100 of the metal material by means of insert molding.

[0089] At this time, while the insert injection molding of the reinforcing material 200 is being implemented, the insert injection molding of the spherical seat 340 of the spherical joint 300 is being implemented.

[0090] First, a first connecting portion 112 penetrating vertically is provided on one side of the main body 100. The first connecting portion 112 may be formed of a metal material and may be coupled to the front side of the main body 100 by pressing and welding.

[0091] The first connection portion 112 is combined with the ball joint 300 .

[0092] The above-mentioned ball joint 300 includes a bracket 310, which is combined with the above-mentioned first connecting part 112 and is connected to the upper and lower parts to form a first opening part 312 and a second opening part 314; a ball stud 320, which includes a ball part 322 that acts as a ball joint and is accommodated in the above-mentioned bracket 310; a cover 334, which covers the upper surface of the above-mentioned ball part 322 in a manner of forming a closed space between the cover 334 and the non-spherical part (not shown) at the end of the above-mentioned ball part 322; and a spherical seat 340, which surrounds the outer spherical surface of the above-mentioned ball part 322 so that the above-mentioned ball stud 320 can flow within the range of the action angle.

[0093] In the cap 334 , a lubricant is provided in a space between the cap 334 and the non-spherical surface portion of the ball portion 322 .

[0094] The spherical seat 340 is formed in the space between the bracket 310 and the ball portion 322 by insert molding, and surrounds the ball portion 322 while covering the upper portion of the cover 334 and the first opening 312 and the second opening 314. Since the spherical seat 340 is formed by insert molding, the inner shape is formed to be consistent with the outer shape of the state in which the cover 334 is combined with the ball portion 322.

[0095] Furthermore, the spherical seat 340 and the reinforcing material 200 are injection molded simultaneously, and the spherical seat 340 is formed to be separated from the reinforcing material 200 by injecting the composite resin melt through a spherical seat gate provided separately from the gate of the reinforcing material 200 .

[0096] That is, the spherical seat 340 and the reinforcing material 200 are separate components, but are manufactured at the same time by the insert injection molding process.

[0097] The ball joint 300 further includes a ball bearing 330 that surrounds the ball portion 322 in a manner that allows the ball stud 320 to flow and is accommodated in the bracket 310 .

[0098] The ball bearing 330 includes: a lubricating sheet 332 that surrounds a portion of the ball portion 322; a cover 334 that covers the non-spherical portion at the end of the ball portion 322 and is formed integrally with the lubricating sheet 332; and a fixing wing 336 that radially protrudes from the outer spherical surface of the lubricating sheet 332 and is supported on the inner surface of the bracket 310.

[0099] In the cap 334 , a lubricant is provided in a space between the cap 334 and the non-spherical surface portion of the ball portion 322 .

[0100] Furthermore, the spherical seat 340 is formed in a space between the bracket 310 and the ball bearing 330 by insert molding, and covers the first opening 312 .

[0101] For the ball bearing 330, the fixing wing 336 is supported by the inner wall of the bracket 310, so the central axis does not shake and is fixed. In addition, after the spherical seat 340 is injection molded, the fixing wing 336 prevents the spherical seat 340 from rotating in the circumferential direction.

[0102] The above description is merely a schematic illustration of the technical concept of the present invention, and therefore, without departing from the essential characteristics of the present invention, a person skilled in the art can make various modifications and variations. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical concept of the present invention, but to illustrate it, and the scope of the technical concept of the present invention is not limited by the above embodiments. The scope of protection of the present invention is determined by the claims, and all technical concepts that should be interpreted as equivalent thereto are included in the scope of the claims of the present invention.

Claims

1. A hybrid control arm for a vehicle, characterized in that: include: A metal material body, comprising an upper wall and two opposite side walls bent downward from the upper wall, and having a shape with an open lower side; as well as a reinforcing material of a composite resin material, which is formed in the main body by insert molding so as to fill at least a portion of the main body, Furthermore, the hybrid control arm for a vehicle comprises: A flange formed at the ends of the two side walls in a circularly curved manner in a direction of widening the opening of the main body; at least one dimple formed in a shape that is recessed on the inner surface of the side wall and protrudes toward the outer surface; and The reinforcing buckle is a part of the reinforcing material and is integrally connected in a manner of surrounding the inner surface of the side wall, the flange and the outer surface of the side wall, and is filled with the recess.

2. The hybrid control arm for a vehicle according to claim 1, characterized in that: The recess is disposed adjacent to a curved portion where the side wall and the flange are connected.

3. The hybrid control arm for a vehicle according to claim 2, characterized in that: The recess is further provided with a connection hole, which is formed through the central portion of the recess in a manner of traversing the inner surface and the outer surface of the recess; The reinforcing material is connected to the inside and the outside of the side wall through the connecting holes.

4. The hybrid control arm for a vehicle according to claim 1, characterized in that: The reinforcing material comprises: A reinforcing grid having reinforcing ribs obliquely crossing the inner surfaces of the two side walls in an "X" shape and not filling the lower surface of the upper wall, A plurality of the reinforcement grids are connected in one piece, and in adjacent reinforcement grids, ends of the reinforcement ribs are connected to each other through the reinforcement buckles.

5. The hybrid control arm for a vehicle according to claim 4, characterized in that: include: At least one fixing hole is formed vertically and continuously on the upper wall; as well as A button is a part of the reinforcing material and is formed on the upper surface of the upper wall through the fixing hole.

6. The hybrid control arm for a vehicle according to claim 5, characterized in that: The fixing hole and the button are configured to correspond to the intersection of the reinforcing ribs.

7. The hybrid control arm for a vehicle according to claim 1, characterized in that: The side wall is formed to be inclined by 2 to 5 degrees in an outer direction of the width of the upper wall with reference to a perpendicular line to the upper wall.

8. The hybrid control arm for a vehicle according to claim 1, characterized in that: include: A first connecting portion extending vertically through one side of the main body; as well as a spherical joint, which is combined with the first connecting portion, The ball joint comprises: A bracket, which is combined with the first connecting portion and is connected to form a first opening and a second opening; a ball stud including a ball portion and a pin portion, wherein the ball portion is received in the bracket; and A spherical seat, which is formed by insert injection molding in the space between the bracket and the ball portion and covers the first opening; The spherical seat and the reinforcing material are injection molded simultaneously, and the spherical seat is formed to be separated from the reinforcing material by injecting a composite resin melt through a spherical seat gate provided separately from a gate of the reinforcing material.

9. The hybrid control arm for a vehicle according to claim 8, characterized in that: The spherical joint further includes a ball bearing which surrounds the spherical portion in a manner that allows the spherical portion to freely rotate within the operating angle range of the ball stud and is accommodated in the bracket. The ball bearing comprises: a lubricating sheet surrounding a portion of the ball portion; a cap covering a non-spherical portion of a distal end of the ball portion and formed integrally with the lubricating sheet; and A fixed wing protrudes radially from the outer spherical surface of the lubricating sheet and is supported on the inner surface of the bracket; The spherical seat is formed in a space between the bracket and the ball bearing by insert molding, and covers the first opening and the second opening.

10. The hybrid control arm for a vehicle according to any one of claims 1 to 9, characterized in that: At least one molding protrusion is provided on the side wall instead of the recess, and the molding protrusion is formed by cutting a part of the side wall and then bending the cut part toward the inside or the outside to protrude.

11. The hybrid control arm for a vehicle according to claim 5 or 6, characterized in that: At least one molding protrusion is provided on the upper wall instead of the fixing hole, and the molding protrusion is formed by cutting a part of the upper wall and then bending the cut part toward the inside or the outside to protrude.

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