KR102607438B1 - Suspension arm for vehicle - Google Patents

Abstract

According to one embodiment of the present invention, a lower arm for a vehicle used to secure a vehicle wheel to a vehicle body is provided. A lower arm for a vehicle according to an embodiment of the present invention includes a lower arm body portion that forms the basic body of the lower arm for a vehicle, and a lower formed at one end of the lower arm body portion and used to connect the lower arm for a vehicle to the wheel or body of the vehicle. It may include an arm mounting portion. According to one embodiment of the present invention, the lower arm body portion includes a lower arm base plate located at the center and a lower arm flange portion formed by bending the end of the lower arm base plate, and all or part of the lower arm flange portion is It may be formed to have a tubular cross-sectional structure with a space formed at the center. According to one embodiment of the present invention, the tubular cross-sectional structure formed in the lower arm flange portion is formed by bending the end of the lower arm base plate and then placing the end adjacent to the lower arm base plate or another portion of the lower arm flange portion. It can be.

Description

Suspension arm for vehicle}

The present invention relates to suspension arms (lower arms and upper arms) used in vehicle suspension systems, and more specifically, to enable easy manufacturing by forming a lightweight structure and to secure the rigidity required for the suspension system. This relates to a suspension arm (lower arm and upper arm) for a vehicle.

A vehicle's suspension system is a device that connects the car body and wheels, including springs that absorb vibration or shock transmitted from the road surface to the car body, shock absorbers that control the operation of these springs, and suspension arms or suspension links that control the operation of the wheels. It consists of etc.

Among these, one side of the suspension arm is connected to the wheel through a ball joint, etc., and the other side is connected to the vehicle body through a cross member or subframe, etc. to support the wheel to the vehicle body and toe-in the wheel according to the driving situation of the vehicle. ), etc., play a role in improving the vehicle's straight-line driving ability and steering stability, and are divided into lower arms and upper arms depending on the installation location.

Such vehicle suspension arms (lower arms and upper arms) are typically formed by processing metal-based materials through casting or press processing to secure the rigidity required for the suspension device. For example, suspension arms for vehicles are manufactured by injecting steel or aluminum into a mold in a molten state and then solidifying it, or by press forming a steel sheet material to manufacture an upper and lower plate and then welding them.

However, conventional vehicle suspension arms have problems such as increasing the overall product weight due to the high weight of the metal material or requiring many manufacturing processes, increasing manufacturing time and cost, and unintentional deformation during welding of the metal material. There is a risk that problems such as decreased rigidity may occur.

For example, referring to Figures 1 and 2, a conventional suspension arm (lower arm) for a vehicle manufactured by welding a press-formed upper plate and a lower plate is shown as an example. As shown in FIG. 1, the vehicle suspension arm 10 is equipped with a ball joint 20 on one side and is coupled to a knuckle 35 connected to the vehicle wheel 30, and the other side is connected to a bushing 22, 24, etc. It is configured to be coupled to the body 40 of the vehicle through, and performs the function of supporting the wheel 30 of the vehicle to the body 40.

On the other hand, the conventional vehicle suspension arm 10 shown in FIGS. 1 and 2 is welded (18) with the separately manufactured upper plate 12 and lower plate 14 facing each other so that an empty space 16 is provided between them. ), and is configured to secure high rigidity even with a small weight by forming a closed cross-section (box-shaped cross-section) by the space 16 formed between the upper plate 12 and the lower plate 14. .

However, since the vehicle suspension arm 10 formed in this way requires welding along the entire circumference of the suspension arm to join the upper plate 12 and the lower plate 14, manufacturing efficiency is reduced and the product is damaged during the welding process. There is a problem that product performance may deteriorate due to unexpected deformation or decrease in rigidity.

The present invention is intended to solve the above-mentioned problems of suspension arms for vehicles, and minimizes the use of heavy metal materials and welding areas, while satisfying the high rigidity characteristics required for suspension devices and enabling easy manufacturing (lower suspension arms) for vehicles. The purpose is to provide arm and upper arm).

A representative configuration of the present invention to achieve the above-described object is as follows.

According to one embodiment of the present invention, a lower arm for a vehicle used to secure a vehicle wheel to a vehicle body is provided. A lower arm for a vehicle according to an embodiment of the present invention includes a lower arm body portion that forms the basic body of the lower arm for a vehicle, and a lower formed at one end of the lower arm body portion and used to connect the lower arm for a vehicle to the wheel or body of the vehicle. It may include an arm mounting portion. According to one embodiment of the present invention, the lower arm body portion includes a lower arm base plate located at the center and a lower arm flange portion formed by bending the end of the lower arm base plate, and all or part of the lower arm flange portion is It may be formed to have a tubular cross-sectional structure with a space formed at the center. According to one embodiment of the present invention, the tubular cross-sectional structure formed in the lower arm flange portion is formed by bending the end of the lower arm base plate and then placing the end adjacent to the lower arm base plate or another portion of the lower arm flange portion. It can be.

According to one embodiment of the present invention, the lower arm mounting portion includes a first lower arm mounting portion used to connect the lower arm for a vehicle to the wheel of the vehicle, a second lower arm mounting portion used to connect the lower arm for a vehicle to the body of the vehicle, and a second lower arm mounting portion used to connect the lower arm for a vehicle to the vehicle body. It includes 3 lower arm mounting portions, and the lower arm flange portion includes a first lower arm flange portion extending between the first lower arm mounting portion and the second lower arm mounting portion, and a second lower arm mounting portion extending between the second lower arm mounting portion and the third lower arm mounting portion. It may include a second lower arm flange portion, and a third lower arm flange portion extending between the third lower arm mounting portion and the first lower arm mounting portion. According to one embodiment of the present invention, the first lower arm flange portion is formed to have a longer length than the second lower arm flange portion and the third lower arm flange portion, and all or part of the first lower arm flange portion has a space at the center. It may be formed to have a tubular cross-sectional structure, and the tubular cross-sectional structure formed in the first lower arm flange portion is formed by bending the end of the lower arm base plate and then attaching the end to the lower arm base plate or another part of the first lower arm flange portion. It can be formed by placing it adjacent to .

According to one embodiment of the present invention, the end of the first lower arm flange portion forming a tubular cross-sectional structure may be welded and coupled to the lower arm base plate or another portion of the first lower arm flange portion while being adjacent to the lower arm base plate. there is.

According to one embodiment of the present invention, the second lower arm flange portion and the third lower arm flange portion are formed by bending to extend in a plane in a different direction from the lower arm base plate while forming a space between the lower arm base plate and the lower arm base plate. You can.

According to one embodiment of the present invention, one or more lower arm recesses arranged to be spaced apart from each other may be provided on one side of the first lower arm flange portion forming a tubular cross-sectional structure.

According to one embodiment of the present invention, a space formed at the center of the tubular cross-sectional structure may be configured to communicate with the outside by a lower arm recess provided in the first lower arm flange portion.

According to one embodiment of the present invention, a reinforcement sheet may be further provided in the lower arm body portion.

According to one embodiment of the present invention, the reinforcing sheet may include a first reinforcing sheet mounted adjacent to the second lower arm mounting portion and a second reinforcing sheet mounted adjacent to the third lower arm mounting portion.

According to one embodiment of the present invention, a lower arm insert made of injection molded plastic that is coupled to and mounted on the lower arm body may be further included.

According to one embodiment of the present invention, the lower arm insert includes a lower arm insert base portion that is closely coupled to the lower arm base plate of the lower arm body portion and a lower arm insert flange portion that is adjacent to and coupled to the lower arm flange portion of the lower arm body portion. It includes, and the lower arm insert may be configured to fill the space located at the center of the tubular cross-sectional structure formed in the first lower arm flange portion and to be integrally formed inside and outside the space.

According to one embodiment of the present invention, the lower arm insert may be provided with a plurality of lower arm insert reinforcement ribs.

According to one embodiment of the present invention, the lower arm base plate is provided with one or more through holes, the lower arm insert is inserted into and filled the through hole formed in the lower arm base plate, and a lower arm insert coupling flange extends around the through hole. It may be configured to form a .

According to one embodiment of the present invention, an upper arm for a vehicle used in a vehicle suspension system is provided. The upper arm for a vehicle according to an embodiment of the present invention includes an upper arm body portion that forms the basic body of the upper arm for a vehicle, and an upper formed at one end of the upper arm body portion and used to connect the upper arm for a vehicle to the wheel or body of the vehicle. It may include an arm mounting portion. According to one embodiment of the present invention, the upper arm body portion includes an upper arm base plate located at the center and an upper arm flange portion formed by bending the end of the upper arm base plate, and all or part of the upper arm flange portion is located at the center. It may be formed to have a tubular cross-sectional structure with a space formed therein. According to one embodiment of the present invention, the tubular cross-sectional structure formed in the upper arm flange portion is formed by bending the end of the upper arm base plate and then placing the end adjacent to the upper arm base plate or another portion of the upper arm flange portion. It can be.

According to one embodiment of the present invention, the upper arm mounting unit includes a first upper arm mounting unit used to connect the upper arm for a vehicle to the wheel of the vehicle, a second upper arm mounting unit used to connect the upper arm for a vehicle to the body of the vehicle, and It includes three upper arm mounting portions, and the upper arm flange portion includes a first upper arm flange portion extending between the first upper arm mounting portion and the second upper arm mounting portion, and a second upper arm flange portion extending between the first upper arm mounting portion and the third upper arm mounting portion. It may include 2 upper arm flange parts and a third upper arm flange part extending between the second upper arm mounting part and the third upper arm mounting part. According to one embodiment of the present invention, all or part of the third upper arm flange portion is formed to have a tubular cross-sectional structure with a space formed at the center, and the tubular cross-sectional structure formed in the third upper arm flange portion is an upper arm base plate. It can be formed by bending the end and then placing the end adjacent to the upper arm base plate or another part of the third upper arm flange part.

According to one embodiment of the present invention, the end of the third upper arm flange portion forming the tubular cross-sectional structure may be welded and joined while disposed adjacent to the upper arm base plate or another portion of the third upper arm flange portion. there is.

According to one embodiment of the present invention, the first upper arm flange portion and the second upper arm flange portion are formed by bending to extend in a plane in a different direction from the upper arm base plate while forming a space between the upper arm base plate and the upper arm base plate. You can.

According to one embodiment of the present invention, one or more upper arm recesses arranged to be spaced apart from each other may be provided on one side of the third upper arm flange portion forming a tubular cross-sectional structure.

According to one embodiment of the present invention, the space formed at the center of the tubular cross-sectional structure may be configured to communicate with the outside by the upper arm recess provided in the third upper arm flange portion.

According to one embodiment of the present invention, an upper arm insert made of injection molded plastic that is coupled to and mounted on the upper arm body may be further included.

According to one embodiment of the present invention, the upper arm insert includes an upper arm insert base portion that is closely coupled to the upper arm base plate of the upper arm body portion and an upper arm insert flange portion that is adjacent to and coupled to the upper arm flange portion of the upper arm body portion. It includes, and the upper arm insert may be configured to fill the space located at the center of the tubular cross-sectional structure formed in the third upper arm flange portion and to be integrally formed inside and outside the space.

According to one embodiment of the present invention, the upper arm insert may be provided with a plurality of upper arm insert reinforcement ribs.

According to an embodiment of the present invention, the upper arm base plate is provided with one or more through holes, and the upper arm insert is inserted and filled into the through hole formed in the upper arm base plate, and an upper arm insert coupling flange extends around the through hole. It may be configured to form a .

In addition, the suspension arm (lower arm and upper arm) for a vehicle according to the present invention may further include other additional components without impairing the technical spirit of the present invention.

The suspension arm (lower arm and upper arm) for a vehicle according to an embodiment of the present invention is configured to reduce weight by forming the body of the suspension arm with a plate-shaped metal material and to be easily manufactured through a press process, etc. By bending the plate material that forms the body at the flange area where a higher load is applied, a tubular cross-sectional structure with an empty space is formed, thereby avoiding an increase in the weight of the suspension arm, and through a tubular cross-sectional structure (closed cross-section structure). The high rigidity requirements required for the suspension system can be satisfied.

In addition, the suspension arm (lower arm and upper arm) for a vehicle according to an embodiment of the present invention forms a recess structure at the end of the flange portion that forms a tubular cross-sectional structure through bending, thereby enabling the use of heavy metal materials. By reducing this, it is possible to prevent wrinkling from occurring when bending the plate to form the flange portion, and further improve the manufacturing efficiency of the suspension arm by reducing the welding area required to fix the tubular cross-sectional structure, thereby improving the welding process. Problems such as deformation that may occur can be suppressed, and when forming an injection plastic insert reinforcement material on the suspension arm to improve the rigidity of the suspension arm, the injection plastic is inserted into the empty space of the flange part that forms a tubular cross-sectional structure through a recess. As it flows in and is formed as one piece, the bonding strength of the insert reinforcement material can be improved.

In addition, the suspension arm (lower arm and upper arm) for a vehicle according to an embodiment of the present invention can secure the necessary rigidity while minimizing the increase in weight by partially installing a reinforcement sheet only in areas that require additional rigidity improvement, and is made of metal. By integrally combining the insert reinforcement material made of lightweight plastic with the suspension arm body, it is possible to form a structure that is relatively lightweight and can further increase overall rigidity.

Figure 1 exemplarily shows the overall structure of a conventional suspension arm (lower arm) for a vehicle.
Figure 2 exemplarily shows the cross-sectional structure of a conventional suspension arm (lower arm) for a vehicle.
3 and 4 exemplarily show the structure of a lower arm for a vehicle according to an embodiment of the present invention.
Figure 5 exemplarily shows an exploded perspective view of a lower arm for a vehicle according to an embodiment of the present invention.
Figure 6 exemplarily shows the structure of a lower arm for a vehicle (in a state in which the lower arm insert is not coupled) according to an embodiment of the present invention.
Figure 7 exemplarily shows the cross-sectional structure of a lower arm for a vehicle (in a state in which the lower arm insert is not coupled) according to an embodiment of the present invention. [Figure 7(a) exemplarily shows an approximate cross-sectional structure cut along the perforation line AA shown in FIG. 6, and FIG. 7(b) shows an approximate cross-sectional structure cut along the perforation line BB shown in FIG. 6. Shown as an example]
Figure 8 exemplarily shows a lower arm insert of a lower arm for a vehicle according to an embodiment of the present invention.
FIG. 9 exemplarily shows the approximate cross-sectional structure of a lower arm for a vehicle according to an embodiment of the present invention cut along the cutting line CC shown in FIG. 3.
10 and 11 exemplarily show the structure of an upper arm for a vehicle according to an embodiment of the present invention.
Figure 12 exemplarily shows an exploded perspective view of an upper arm for a vehicle according to an embodiment of the present invention.
Figure 13 exemplarily shows the structure of an upper arm for a vehicle (in a state in which the upper arm insert is not coupled) according to an embodiment of the present invention.
Figure 14 exemplarily shows a cross-sectional structure of an upper arm for a vehicle (in a state in which the upper arm insert is not coupled) according to an embodiment of the present invention. [Figure 14(a) exemplarily shows an approximate cross-sectional structure cut along the perforation line DD shown in FIG. 13, and FIG. 14(b) shows an approximate cross-sectional structure cut along the perforation line EE shown in FIG. 13. Shown as an example]
Figure 15 exemplarily shows the upper arm insert structure of the upper arm for a vehicle according to an embodiment of the present invention.
FIG. 16 exemplarily shows the approximate cross-sectional structure of an upper arm for a vehicle according to an embodiment of the present invention cut along the perforation line FF shown in FIG. 10.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail so that a person skilled in the art can easily implement the present invention.

In order to clearly explain the present invention, detailed descriptions of parts unrelated to the present invention will be omitted, and like elements will be described with the same reference numerals throughout the specification. In addition, the shape and size of each component shown in the drawings are arbitrarily drawn for convenience of explanation, and the present invention is not necessarily limited to the shape and size shown. That is, the specific shape, structure, and characteristics described in the specification may be modified and implemented from one embodiment to another without departing from the spirit and scope of the present invention, and the location or arrangement of individual components may also be implemented within the spirit and scope of the present invention. It should be understood that changes can be made without departing from the scope. Accordingly, the detailed description described below is not intended to be limited, and the scope of the present invention should be taken to encompass the scope claimed by the claims and all equivalents thereof.

Lower arm for a vehicle according to an embodiment of the present invention

3 to 9, a lower arm 100 for a vehicle according to an embodiment of the present invention is shown as an example. As described later, the lower arm 100 for a vehicle according to an embodiment of the present invention has one side connected to the wheel of the vehicle and the other side connected to the body of the vehicle to fix the wheel of the vehicle to the body and control the movement of the wheel. performs its function.

According to one embodiment of the present invention, the lower arm 100 for a vehicle may include a lower arm body portion 200 located at the center and a lower arm mounting portion 300 provided at an end of the lower arm body portion.

According to an embodiment of the present invention, the lower arm body portion 200 is a part that forms the basic frame of the lower arm 100 for a vehicle according to an embodiment of the present invention, and includes a lower arm base plate 210 located at the center. ) and a lower arm flange portion 220 formed on the outer periphery (circumference) of the lower arm base plate.

According to one embodiment of the present invention, the lower arm base plate 210 constituting the lower arm body portion 200 may be formed by forming a high-strength steel plate, etc. using a pressing method, and the lower arm flange portion 220 may be formed by forming the lower arm flange portion 220. The arm base plate 210 may be bent to be formed integrally with the lower arm base plate 210, and the lower arm base plate 210 of the lower arm body portion 200 may have one or more through holes [of the lower arm base plate]. Through hole 212] is provided, and when the lower arm insert 400, which will be described later, is injected and coupled to the lower arm body portion 200, the lower arm insert 400 is inserted into and fills the through hole 212, forming a coupling flange. The lower arm insert 400 may be configured to be stably coupled to and maintained in the lower arm body portion 200 by forming a [lower arm insert coupling flange 492, which will be described later].

According to one embodiment of the present invention, the lower arm flange portion 220 formed on the lower arm body portion 200 is formed along the circumference of the lower arm body portion and has the function of increasing the rigidity of the lower arm body portion 200. It can be done. For example, the lower arm 100 for a vehicle according to an embodiment of the present invention includes one or more lower arm mounting portions (first lower arm mounting portion 310) connected to one end of the lower arm body portion 200 and the wheel side, as will be described later. ] and may be configured to have one or more mounting parts (second lower arm mounting part 320 and third lower arm mounting part 330) connected to the vehicle body at the other end, and a lower arm flange part [ A first lower arm flange portion 230 extending between the first lower arm mounting portion 310 and the second lower arm mounting portion 320, and between the second lower arm mounting portion 320 and the third lower arm mounting portion 330. A second lower arm flange portion 240 extending, a third lower arm flange portion 250 extending between the third lower arm mounting portion 330 and the first lower arm mounting portion 310] may be configured to be formed. .

According to one embodiment of the present invention, the lower arm mounting portion 300 provided at the end of the lower arm body portion 200, that is, one or more mounting portions (lower arm first mounting portion 310) connected to the wheel of the vehicle and the vehicle. One or more mounting parts (lower arm second mounting part 320 and lower arm third mounting part 330) connected to the vehicle body may be used to connect the lower arm to the wheels or body of the vehicle.

The first lower arm mounting portion 310 is formed at one end of the lower arm 100 for a vehicle according to an embodiment of the present invention and is mounted to accommodate a ball joint 340 that is coupled to a steering knuckle connected to the wheel of the vehicle. It can perform its function.

As shown in FIG. 5, the ball joint 340 mounted on the first lower arm mounting portion 310 includes a ball stud 340a with a ball member formed on one side, and a ball seat 340b that surrounds and supports the ball member of the ball stud. It is composed of a dust cover (340c) that wraps around the ball stud to prevent external foreign substances from entering, a cling lip (340d) that secures the dust cover, and a protector (340e) that is covered on the top of the ball stud. It may be configured to accommodate and support the provided ball member within the first lower arm mounting portion 310 to perform a function of assisting relative motion between connected parts.

The second lower arm mounting portion 320 and the third lower arm mounting portion 330 are formed at the other end of the vehicle lower arm 100 and can be used to connect the vehicle lower arm 100 to the vehicle body. To this end, the second lower arm mounting portion 320 and the third lower arm mounting portion 330 may be configured so that a bushing, etc. used to connect the vehicle lower arm 100 to the vehicle body can be coupled.

For example, in the embodiment of the vehicle lower arm 100 shown in the drawing, the second lower arm mounting portion 320 is in the form of an approximately T-shaped inline bushing portion having a mounting sheet 322 and a protruding pin 324 extending therefrom. It is formed to connect the mounting sheet 322 to one end of the vehicle lower arm 100 by welding, etc., and is configured to be fastened to the vehicle body by attaching a bushing, etc. to the protruding pin 324. 3 The lower arm mounting portion 330 is formed of a roughly circular bushing pipe with a central portion penetrated so that the bushing 350 can be inserted and coupled to the center, and the bushing 350 is coupled to the third lower arm mounting portion 330. It is configured so that it can be fastened to the body of the vehicle.

However, the structure of the lower arm mounting portion (first lower arm mounting portion 310, second lower arm mounting portion 320, and third lower arm mounting portion 330) of the lower arm 100 for a vehicle according to an embodiment of the present invention is It should not be limited to the form shown in the drawings, and may be formed in various shapes that can be used to connect the lower arm 100 for a vehicle to the wheels and/or body of the vehicle.

Meanwhile, referring to FIG. 7, an approximate cross-sectional structure of the lower arm body portion 200 constituting the lower arm 100 for a vehicle according to an embodiment of the present invention is shown as an example. As shown in FIG. 7, the lower arm body portion 200 of the lower arm 100 for a vehicle according to an embodiment of the present invention includes a lower arm base plate 210 and a lower arm base plate 210 located at the center. It may be configured to include a lower arm flange portion 220 formed along the circumference of the lower arm flange portion 220, and all or part of the lower arm flange portion 220 of the lower arm body portion 200 has a space (empty space) at the center. It may be configured to be formed into a formed tubular cross-sectional structure (box-shaped cross-sectional structure; closed box section). That is, the lower arm 100 for a vehicle according to an embodiment of the present invention includes all or part of the first lower arm flange portion 230, the second lower arm flange portion 240, and the third lower arm flange portion 250. It may be configured to be provided with a tubular cross-sectional structure.

For example, the lower arm 100 for a vehicle of the embodiment shown in the drawing includes a first lower arm formed between the first lower arm mounting portion 310 and the second lower arm mounting portion 320 as shown in FIGS. 6 and 7. The arm flange portion 230 is formed by bending the end of the lower arm base plate 210 and is configured to have an approximately tubular cross-sectional structure with an empty space (space portion 260 of the lower arm flange portion) formed therein. .

In more detail, the first lower arm flange portion 230 of the vehicle lower arm 100 of the embodiment shown in the drawing includes a first bent portion 230a bent downward from the lower arm base plate 210, A second bent portion 230b bent upward from the first bent portion 230a, an extension portion 230c extending upward from the second bent portion 230b, and a lower arm base plate 210 from the extension portion 230c. ) may be formed of a third bent portion 230d bent toward the side, a fourth bent portion 230e bent from the third bent portion 230d toward the lower arm base plate 210, and the first bent portion ( 230a), the second bent part 230b, the connecting part 230c, the third bent part 230d, and the fourth bent part 230e create an internal empty space (space part 260 of the lower arm flange part). It may be configured to form a tubular cross-sectional structure (closed box sections), and the end of the first lower arm flange portion 230 (in the case of the embodiment shown in the drawing, the end of the fourth bent portion 230e) is the lower arm. It may be configured to be disposed adjacent to the base plate 210 or another part of the first lower arm flange portion 230 and coupled to it through welding 270 or the like.

According to this structure, the first lower arm flange portion 230 is formed in a tubular cross-sectional structure (closed cross-sectional structure) with an empty space inside, and thus the rigidity is increased compared to a typical lower arm flange portion for a vehicle that is formed in a plate shape. It becomes possible.

In particular, the first lower arm flange portion 230 (tire patch portion) is a portion of the vehicle lower arm to which the greatest load is applied when the vehicle is driven, and as described above, all or part of the first lower arm flange portion 230 By forming a tubular cross-sectional structure with an empty space inside, the rigidity of the lower arm 100 for a vehicle can be more effectively increased.

In addition, according to the above-described structure, the tubular cross-sectional structure formed in the first lower arm flange portion 230 can be formed by partially welding the end of the first lower arm flange portion, so that the conventional structure shown in FIGS. 1 and 2 Compared to lower arms for vehicles, a tubular cross-sectional structure can be formed while welding fewer parts, which makes it possible to more easily improve the rigidity of lower arms for vehicles while suppressing problems of deformation or decrease in rigidity that may occur during the welding process. do.

Meanwhile, according to one embodiment of the present invention, an empty space (space part 260 of the lower arm flange part) formed by the first lower arm flange part 230 is located on one side of the first lower arm flange part 230. There may be one or more recesses (lower arm recess 232) communicating with the outside. For example, the first lower arm flange portion 230 of the lower arm 100 for a vehicle according to an embodiment of the present invention may be configured to be provided with one or more lower arm recesses 232 that are recessed inward from the end portion. You can.

According to this structure, the material of the metal plate forming the first lower arm flange portion 230 is partially removed by the lower arm recess 232 formed in the first lower arm flange portion 230. The weight of the product can be reduced, and when the end of the lower arm base plate 210 is bent to form the first lower arm flange portion 230, a wrinkling phenomenon occurs in the material, causing the first lower arm flange to be damaged. It is possible to prevent unintentional wrinkles from occurring in the branch 230 or the lower arm base plate 210 adjacent thereto. Furthermore, as described later, when forming a lower arm for a vehicle in a hybrid form of a mixture of metal and plastic materials by combining the lower arm insert 400 formed of injection plastic, etc. with the lower arm body portion 200, the lower arm insert ( The molten plastic material forming 400) flows into the space formed in the first lower arm flange 230 (space 260 of the lower arm flange portion) through the lower arm recess 232 and fills the space. The rigidity of the first lower arm flange 230 to which a large load is applied can be further improved, and the lower arm insert 400 is formed in the first lower arm flange portion 230 by the lower arm recess 232. By being integrally formed inside and outside the space, the lower arm insert 400 can be more firmly coupled to and maintained in the lower arm body portion 200.

Meanwhile, according to one embodiment of the present invention, the second lower arm flange portion 240 and the third lower arm flange portion 250 constituting the lower arm body portion 200 are the first lower arm flange portion 230. Similarly, it can be formed by bending the end of the lower arm base plate 210. For example, the second lower arm flange portion 240 and the third lower arm flange portion 250 bend the end of the lower arm base plate 210 downward and then bend it upward again, as shown in FIG. 7 to form the lower arm. It may be formed to extend in a direction different from the arm base plate 210 (for example, in a direction approximately perpendicular to the lower arm base plate 210). In the case of the embodiment shown in the drawing, as shown in (a) of FIG. 7, the first bent portion 240a is bent downward from the lower arm base plate 210, and the first bent portion 240a is bent upward from the first bent portion 240a. The second lower arm flange portion 240 is formed to include a second bent portion 240b that is bent, an extension portion 240c extending upward from the second bent portion 240b, etc., and is formed as shown in (b) of Figure 7. ), a first bent portion 250a bent downward from the lower arm base plate 210, a second bent portion 250b bent upward from the first bent portion 250a, and a second bent portion. It is configured to form the third lower arm flange portion 250 to include an extension portion 250c extending upward from 250b.

According to this structure, the second lower arm flange portion 240 and the third lower arm flange portion 250 are wall flanges extending in an approximately vertical direction while being spaced apart from the lower arm base plate 210 (second lower arm). An extension portion 240c of the flange portion 240 and an extension portion 250c of the third lower arm flange portion 250] are formed, thereby ensuring the rigidity of the lower arm 100 for a vehicle. In addition, the wall flange formed on the second lower arm flange portion 240 and the third lower arm flange portion 250 (extension portion 240c of the second lower arm flange portion 240 and the third lower arm flange portion ( The extension portion 250c of 250) is an empty space between the lower arm base plate 210 (provided between the extension portion 240c of the lower arm base plate 210 and the second lower arm flange portion 240). space 280 and a space 290 provided between the lower arm base plate 210 and the extension portion 250c of the third lower arm flange portion 250] and are arranged to be spaced apart from each other. The lower arm insert 400, which will be described later, is filled in the portion, thereby ensuring higher rigidity in the flange portion. Meanwhile, the end portions of the second flange portion 240 and the third flange portion 250 are bent to one side so that the lower arm insert 400, which will be described later, can be more stably coupled to the lower arm body portion 200. good night.

Meanwhile, in the case of the embodiment shown in the drawing, the first lower arm flange portion 230 (tire patch portion) to which the greatest load is applied in the vehicle lower arm 100 is formed into a tubular cross-sectional structure, and the first lower arm 100 is relatively The second lower arm flange portion 240 and the third lower arm flange portion 250, to which a smaller load is applied than the arm flange portion 230, are provided with a wall flange extending approximately perpendicular to the lower arm base plate 210. It is configured to meet the rigidity requirements required for the vehicle lower arm 100, minimize the weight of the product, and form the vehicle lower arm with as simple a structure as possible. However, the lower arm 100 for a vehicle according to an embodiment of the present invention is not limited to this structure, but includes the second lower arm flange portion 240 and the third lower arm flange portion to ensure higher rigidity. 250 may also be configured to have a tubular cross-sectional structure similar to the first lower arm flange portion 230.

Meanwhile, the lower arm 100 for a vehicle according to an embodiment of the present invention may be configured to secure partial strength improvement by forming reinforcing members such as the reinforcing sheet 280 in areas where additional rigidity is needed. For example, the lower arm 100 for a vehicle according to an embodiment of the present invention is provided with additional reinforcing members near the second lower arm mounting portion 320 and the third lower arm mounting portion 330 coupled to the vehicle body to secure additional rigidity. It can be configured to do so.

Typically, the vehicle lower arm 100 is subjected to a large torsional load and/or tensile force near the second lower arm mounting portion 320 and the third lower arm mounting portion 330 in addition to the first flange portion 230 (tire patch portion). There is a risk that it will happen. Therefore, the vehicle lower arm 100 according to an embodiment of the present invention is installed near the second lower arm mounting portion 320 by additionally mounting the first reinforcement sheet 282 at a position adjacent to the second lower arm mounting portion 320. A tubular cross-sectional structure (box-shaped cross-sectional structure) is formed to increase the rigidity near the second lower arm mounting portion 320 in a similar manner to the first lower arm flange portion 230, and the third lower arm mounting portion 330 ) is additionally installed at a position adjacent to the second reinforcement sheet 284 to form a tubular cross-sectional structure (box-shaped cross-sectional structure) near the third lower arm mounting portion 330, thereby forming the third lower arm mounting portion 330 in a similar manner to the first flange portion 230 It may be configured to increase rigidity near the lower arm mounting portion 330. According to one embodiment of the present invention, these reinforcing sheets (first reinforcing sheet 282 and second reinforcing sheet 284) are joined by welding to the lower arm flange portion 220 formed on the lower arm body portion 200. It can be configured as follows.

However, the reinforcement sheet does not have to be limited to the above-mentioned position and shape shown in the drawing, but can be configured to be partially installed in the lower arm of the vehicle in the area where additional rigidity is desired depending on the design, and can be formed in any of various shapes. It can be formed and used.

Meanwhile, according to an embodiment of the present invention, the lower arm insert 400 formed of a lightweight material such as plastic is coupled to the lower arm 100 for a vehicle to achieve weight reduction and secure rigidity.

According to one embodiment of the present invention, the lower arm insert 400 may be formed to correspond to the overall shape of the lower arm 100 for a vehicle and is adjacent to the lower arm base plate 210 of the lower arm body portion 200. It may include a lower arm insert base portion 410 coupled to the lower arm insert flange portion 420 formed around the lower arm insert base portion 410. For example, in the case of the vehicle lower arm 100 shown in the drawing, the first lower arm insert flange portion 430 is coupled to the first lower arm flange portion 230, and the second lower arm flange portion 240 is coupled to the lower arm 100. The lower arm insert flange portion 420 is formed to include a second lower arm insert flange portion 440 and a third lower arm insert flange portion 450 coupled to the third lower arm flange portion 250.

According to one embodiment of the present invention, the lower arm insert 400 may be further provided at an end with a lower arm insert mounting portion that at least partially surrounds the lower arm mounting portion 300. For example, the lower arm insert 400 may be configured to surround the first lower arm mounting portion 310 by providing a first lower arm insert mounting portion 460 at a position corresponding to the first lower arm mounting portion 310, A second lower arm mounting portion 320 is provided with a second lower arm mounting portion 470 and a third lower arm mounting portion 480 at positions corresponding to the second lower arm mounting portion 320 and the third lower arm mounting portion 330. ) and the third lower arm mounting portion 330 may be completely or partially wrapped to improve strength.

Meanwhile, according to an embodiment of the present invention, the lower arm insert 400 is provided with reinforcing ribs 490 to further improve rigidity, and an empty space is formed between the reinforcing ribs 490 to improve rigidity. It can be configured to further reduce weight while improving. For example, the reinforcing rib 490 may be configured to protrude from the surface of the lower arm insert 400 and extend between the flange portions of the lower arm insert 400, as shown in FIG. 8, and is formed in a lattice structure to provide reinforcement. It may be configured so that an empty space is formed between the ribs.

Meanwhile, the lower arm 100 for a vehicle according to an embodiment of the present invention has a through hole (through hole 212 of the lower arm base) in the lower arm base plate 210 forming the lower arm body portion 200, as described above. )] is formed, so when injection plastic, etc. is injected with the lower arm mounted on the mold to form the lower arm insert 400 in the lower arm body portion 200, the injection plastic material is formed in the through hole 212. A coupling flange (lower arm insert coupling flange 292) flows from one side of the lower arm body 200 to the opposite side and extends around the through hole while filling the through hole 212 as shown in FIG. 9. By forming the lower arm insert 400 to be more firmly coupled to the lower arm body portion 200, a stable coupling state can be maintained.

In addition, the lower arm 100 for a vehicle according to an embodiment of the present invention has a recess (lower arm recess 232) in the first lower arm flange portion 230 formed on one side of the lower arm body portion 200. Since the space portion 260 of the first lower arm flange portion 230 is configured to communicate with the outside, when injection plastic, etc. is injected to form the lower arm insert 400, the injection plastic is connected to the lower arm lip. The rigidity of the first lower arm flange portion 230 can be further improved by flowing into and filling the space portion 260 through the cess 232, and the space portion 260 of the first lower arm flange portion 230 can be further improved. As the inner and outer lower arm inserts 400 are integrally formed and hardened, the lower arm inserts 400 can be more firmly coupled to the lower arm body portion 200.

Upper arm for a vehicle according to an embodiment of the present invention

Next, referring to FIGS. 10 to 16, an upper arm 500 for a vehicle according to an embodiment of the present invention is shown as an example. The upper arm 500 for a vehicle according to an embodiment of the present invention has one side connected to the wheel of the vehicle and the other side connected to the body of the vehicle so as to fix the wheel of the vehicle to the body of the vehicle together with the lower arm 100 for the vehicle described above. It performs the function of controlling the movement of For example, the lower arm 500 for a vehicle according to an embodiment of the present invention may be formed in an approximately U-shaped structure including two leg portions and a joint portion connecting them, as shown in the drawing.

According to one embodiment of the present invention, the upper arm 500 for a vehicle may include an upper arm body portion 600 located at the center and an upper arm mounting portion 700 provided at an end of the upper arm body portion.

According to an embodiment of the present invention, the upper arm body portion 600 is a part that forms the basic frame of the upper arm 500 for a vehicle according to an embodiment of the present invention, and the upper arm base plate 610 is located at the center. ) and an upper arm flange portion 620 formed on the outer periphery (periphery) of the upper arm base plate.

According to one embodiment of the present invention, the upper arm base plate 610 constituting the upper arm body portion 600 may be formed by forming a high-tensile steel plate, etc. using a press method, and the upper arm flange portion 620 may be formed by forming the upper arm flange portion 620. The arm base plate 610 may be bent to be formed integrally with the upper arm base plate 610, and the upper arm base plate 610 of the upper arm body portion 600 may have one or more through holes [of the upper arm base plate]. Through hole 612] is provided, and when the upper arm insert 800, which will be described later, is injected and coupled to the upper arm body portion 600, the upper arm insert 800 is inserted into the through hole 612 and filled, forming a coupling flange. The upper arm insert 800 may be configured to be stably coupled to and maintained in the upper arm body portion 800 by forming an [upper arm insert coupling flange 892, which will be described later].

According to one embodiment of the present invention, the upper arm flange portion 620 formed on the upper arm body portion 600 is formed along the circumference of the upper arm body portion and has the function of increasing the rigidity of the upper arm body portion 600. It can be done. For example, the upper arm 500 for a vehicle according to an embodiment of the present invention has one or more upper arm mounting units (first upper arm mounting unit 710) connected to one end of the upper arm body portion 500 and the wheel side, as will be described later. ] and may be configured to have one or more mounting parts (second upper arm mounting part 720 and third upper arm mounting part 730) connected to the vehicle body at the other end, and an upper arm flange part [second upper arm mounting part 730] between them. 1 First upper arm flange portion 630 extending between the upper arm mounting portion 710 and the second upper arm mounting portion 720, extending between the first upper arm mounting portion 710 and the third upper arm mounting portion 730 A second upper arm flange portion 640, a third upper arm flange portion 650 extending between the second upper arm mounting portion 720 and the third upper arm mounting portion 730] may be formed.

According to one embodiment of the present invention, the upper arm mounting portion 700 provided at the end of the upper arm body portion 600, that is, one mounting portion (first upper arm mounting portion 710) connected to the wheel of the vehicle and the vehicle One or more mounting parts (the second upper arm mounting part 720 and the third upper arm mounting part 730) connected to the vehicle body may be used to connect the upper arm to the wheel or body of the vehicle.

The first upper arm mounting portion 710 is formed at one end of the upper arm 500 for a vehicle according to an embodiment of the present invention and is mounted to accommodate a ball joint 740 that is coupled to a steering knuckle connected to the wheel of the vehicle. It can perform its function.

The ball joint 740 mounted on the first upper arm mounting portion 710 includes a ball stud 740a with a ball member formed on one side as shown in FIG. 12, and a ball seat 740b that surrounds and supports the ball member of the ball stud. It consists of a dust cover (740c) that wraps around the ball stud to prevent external foreign substances from entering, a cling lip (740d) that secures the dust cover, and a protector (740e) that is covered on the top of the ball stud. It may be configured to accommodate and support the provided ball member within the first upper arm mounting portion 710 to perform a function of assisting relative motion between connected parts.

The second upper arm mounting portion 720 and the third upper arm mounting portion 730 are formed on the other end of the vehicle upper arm 700 and can be used to connect the vehicle upper arm 700 to the vehicle body. To this end, the second upper arm mounting portion 720 and the third upper arm mounting portion 730 may be configured so that a bushing 750 used to connect the vehicle upper arm 500 to the vehicle body can be coupled.

However, the structure of the upper arm mounting portion (first upper arm mounting portion 710, second upper arm mounting portion 720, and third upper arm mounting portion 730) of the upper arm 500 for a vehicle according to an embodiment of the present invention. It should not be limited to the form shown in the drawings, and may be formed in various shapes that can be used to connect the upper arm 500 for a vehicle to the wheels and/or body of the vehicle.

Meanwhile, referring to FIG. 14, the approximate cross-sectional structure of the upper arm body portion 600 constituting the upper arm 500 for a vehicle according to an embodiment of the present invention is shown as an example. As shown in FIG. 14, the upper arm body portion 600 of the upper arm 500 for a vehicle according to an embodiment of the present invention includes an upper arm base plate 610 and an upper arm base plate 610 located at the center. It may be configured to include an upper arm flange portion 620 formed along the circumference of the upper arm body portion 600, where all or part of the upper arm flange portion 620 has a tubular cross-sectional structure with an empty space at the center. It may be configured to be formed as a (box-shaped cross-sectional structure; closed box section). That is, the upper arm 500 for a vehicle according to an embodiment of the present invention includes all or part of the first upper arm flange portion 630, the second upper arm flange portion 640, and the third upper arm flange portion 650. It may be configured to be provided with a tubular cross-sectional structure.

For example, the upper arm 500 for a vehicle of the embodiment shown in the drawing has a third upper formed between the second upper arm mounting portion 720 and the third upper arm mounting portion 730 as shown in FIGS. 13 and 14. The arm flange portion 650 is formed by bending the end of the upper arm base plate 610, and is configured to have an approximately tubular cross-sectional structure in which an empty space (space portion 660 of the upper arm flange portion) is formed. .

In more detail, the third upper arm flange portion 650 of the vehicle upper arm 500 of the embodiment shown in the drawing includes a first bent portion 650a bent downward from the upper arm base plate 610, A second bent portion 650b bent upward from the first bent portion 650a, an extension portion 650c extending upward from the second bent portion 650b, and an upper arm base plate 610 from the extension portion 650c. ) may be formed of a third bent portion 650d bent toward the side, a fourth bent portion 650e bent from the third bent portion 650d toward the upper arm base plate 610, and the first bent portion ( 650a), the second bent part 650b, the connecting part 650c, the third bent part 650d, and the fourth bent part 650e create an internal empty space (space 660 of the upper arm flange part). It may be configured to form a tubular cross-sectional structure (closed box sections), and the end of the third lower arm flange portion 650 (in the case of the embodiment shown in the drawing, the end of the fourth bent portion 650e) is the upper arm. It may be configured to be disposed adjacent to the base plate 610 or another part of the third upper arm flange portion 650 and coupled to it through welding 670 or the like.

According to this structure, the third upper arm flange portion 650 is formed in a tubular cross-sectional structure (closed cross-sectional structure) with an empty space inside, and thus has increased rigidity compared to a typical vehicle upper arm flange portion formed in a plate shape. It becomes possible.

In particular, the long inner flange portion (in the case of the embodiment shown in the drawing, the third lower arm flange portion 650) disposed on the vehicle body side of the vehicle upper arm is the portion to which the greatest load is applied when the vehicle is driven, as described above. As described above, if all or part of the third upper arm flange portion 650 is formed with a tubular cross-sectional structure with an empty space inside, the rigidity of the upper arm 500 for a vehicle can be more effectively increased.

In addition, according to the above-described structure, the tubular cross-sectional structure formed in the third upper arm flange portion 650 can be formed by partially welding the end of the third upper arm flange portion, compared to the conventional vehicle suspension arm described above. A tubular cross-sectional structure can be formed by welding only a smaller number of parts, which makes it possible to more easily improve the rigidity of the vehicle upper arm while suppressing problems of deformation or decrease in rigidity that may occur during the welding process.

Meanwhile, according to one embodiment of the present invention, an empty space (space 660 of the upper arm flange portion) formed by the third upper arm flange portion 650 is located on one side of the third upper arm flange portion 650. There may be one or more recesses (upper arm recess 652) communicating with the outside. For example, the third upper arm flange portion 650 of the upper arm 500 for a vehicle according to an embodiment of the present invention may be configured to be provided with one or more upper arm recesses 652 that are recessed inward from the end portion. You can.

According to this structure, the material of the metal plate forming the third upper arm flange portion 650 is partially removed by the upper arm recess 652 formed in the third upper arm flange portion 650. The weight of the product can be reduced, and when the end of the upper arm base plate 610 is bent to form the third upper arm flange portion 650, a wrinkling phenomenon occurs in the material, creating a third upper arm flange. It is possible to prevent unintentional wrinkles from occurring in the branch 650 or the upper arm base plate 610 adjacent thereto. Furthermore, as described later, when forming an upper arm for a vehicle in a hybrid form of a mixture of metal and plastic materials by combining the upper arm insert 800 formed of injection plastic, etc. with the upper arm body portion 600, the upper arm insert ( The molten plastic material forming 800 flows into the space formed in the third upper arm flange portion 650 (space 660 of the upper arm flange portion) through the upper arm recess 652 to fill the space. As a result, the rigidity of the third upper arm flange portion 650 to which a large load is applied can be further improved, and the upper arm insert 800 is attached to the third upper arm flange portion 650 by the upper arm recess 652. Since the inside and outside of the formed space are formed integrally, the upper arm insert 800 can be more firmly coupled to the upper arm body portion 600 and maintained.

Meanwhile, according to one embodiment of the present invention, the first upper arm flange portion 630 and the second upper arm flange portion 640 constituting the upper arm body portion 600 are the third upper arm flange portion 650. Similarly, it can be formed by bending the end of the upper arm base plate 610. For example, the first upper arm flange portion 630 and the second upper arm flange portion 640 are formed by bending the end of the upper arm base plate 610 downward and then bending it upward again, as shown in FIG. 14. It may be formed to extend in a direction different from the arm base plate 610 (for example, in a direction approximately perpendicular to the upper arm base plate 610). In the case of the embodiment shown in the drawing, as shown in (a) of FIG. 14, the first bent portion 630a is bent downward from the upper arm base plate 610, and the first bent portion 630a is bent upward from the first bent portion 630a. The first upper arm flange portion 630 is formed to include a second bent portion 630b bent, an extension portion 630c extending upward from the second bent portion 630b, and the like, and (b) in FIG. 14 ), a first bent portion 640a bent downward from the upper arm base plate 610, a second bent portion 640b bent upward from the first bent portion 640a, and a second bent portion. It is configured to form the third upper arm flange portion 640 to include an extension portion 640c extending upward from 640b.

According to this structure, the first upper arm flange portion 630 and the second upper arm flange portion 640 are wall flanges extending in an approximately vertical direction while being spaced apart from the upper arm base plate 610 (the first upper arm flange). An extension portion 630c of the flange portion 630 and an extension portion 6340c of the second upper arm flange portion 640 are formed to ensure the rigidity of the upper arm 500 for a vehicle. In addition, the wall flange formed on the first upper arm flange portion 630 and the second upper arm flange portion 640 (extension portion 630c of the first upper arm flange portion 630 and the second upper arm flange portion ( The extension portion 640c of 640) is an empty space between the upper arm base plate 610 (provided between the upper arm base plate 610 and the extension portion 630c of the first upper arm flange portion 630). space 680 and a space 690 provided between the upper arm base plate 610 and the extension portion 640c of the second upper arm flange portion 640] and are arranged to be spaced apart from each other. The upper arm insert 800, which will be described later, is filled in the portion, thereby ensuring higher rigidity in the flange portion. Meanwhile, the end portions of the first upper arm flange portion 630 and the second upper arm flange portion 640 are bent to one side so that the upper arm insert 800, which will be described later, can be more stably coupled to the upper arm body portion 600. It can be configured to do so.

Meanwhile, in the case of the embodiment shown in the drawing, the third upper arm flange portion 650 (inner flange portion) to which the greatest load is applied in the vehicle upper arm 500 is formed into a tubular cross-sectional structure, and the third upper arm 500 is relatively The first upper arm flange portion 630 and the second upper arm flange portion 640, to which a smaller load is applied than the arm flange portion 650, are provided with a wall flange extending approximately perpendicular to the upper arm base plate 610. It is configured to satisfy the rigidity requirements required for the vehicle upper arm 500, minimize the weight of the product, and form the vehicle upper arm with as simple a structure as possible. However, the upper arm 500 for a vehicle according to an embodiment of the present invention is not limited to this structure, and includes the first upper arm flange portion 630 and the second upper arm flange portion to ensure higher rigidity. 640 may also be configured to have a tubular cross-sectional structure similar to the third upper arm flange portion 650.

Meanwhile, although not shown in the drawings, the upper arm 500 for a vehicle according to an embodiment of the present invention is partially formed like the lower arm 100 for a vehicle described above by adding reinforcing members such as reinforcement sheets to areas that require additional rigidity. It may be configured to secure additional rigidity.

According to one embodiment of the present invention, the upper arm 500 for a vehicle may be configured to improve rigidity by combining an upper arm insert 800 made of a lightweight material such as plastic.

According to one embodiment of the present invention, the upper arm insert 800 may be formed to correspond to the overall shape of the upper arm 500 for a vehicle and is adjacent to the upper arm base plate 610 of the upper arm body portion 600. It may include an upper arm insert base portion 810 that is coupled and an upper arm insert flange portion 820 formed around the upper arm insert base portion 810. For example, in the case of the vehicle upper arm 500 shown in the drawing, a first upper arm insert flange portion 830 coupled to the first upper arm flange portion 630 and a second upper arm flange portion 640 are coupled to the vehicle upper arm 500. The upper arm insert flange portion 820 is configured to include a second upper arm insert flange portion 840 and a third upper arm insert flange portion 850 coupled to the third upper arm flange portion 650.

According to one embodiment of the present invention, the upper arm insert 800 may further be provided at an end with an upper arm insert mounting portion that at least partially surrounds the upper arm mounting portion 700. For example, the upper arm insert 800 may be configured to surround the first upper arm mounting portion 710 by providing a first upper arm insert mounting portion 860 at a position corresponding to the first upper arm mounting portion 710, A second upper arm mounting portion 720 is provided with a second upper arm mounting portion 870 and a third upper arm mounting portion 880 at positions corresponding to the second upper arm mounting portion 720 and the third upper arm mounting portion 730. ) and the third upper arm mounting portion 730 may be completely or partially wrapped to improve strength.

Meanwhile, according to an embodiment of the present invention, the upper arm insert 800 is provided with reinforcing ribs 890 to further improve rigidity, and an empty space is formed between the reinforcing ribs 890 to improve rigidity. It can be configured to further reduce weight while improving. For example, the reinforcing rib 890 may be configured to protrude from the surface of the upper arm insert 800 and extend between the flange portions of the upper arm insert 800, as shown in Figure 15, and is formed in a lattice structure to provide reinforcement. It may be configured so that an empty space is formed between the ribs.

Meanwhile, the upper arm 500 for a vehicle according to an embodiment of the present invention has a through hole (through hole of the upper arm base plate) in the upper arm base plate 610 forming the upper arm body portion 600, as described above. 612)] is formed, so when injection plastic, etc. is injected with the upper arm mounted on the mold to form the upper arm insert 800 in the upper arm body portion 600, the injection plastic material is formed through the through hole 612. A coupling flange (upper arm insert coupling flange ( 892)], the upper arm insert 800 is more firmly coupled to the upper arm body portion 600 and can be configured to maintain a stable coupling state.

In addition, the upper arm 500 for a vehicle according to an embodiment of the present invention has a recess (upper arm recess 652) in the third upper arm flange portion 650 formed on one side of the upper arm body portion 600. Since the space portion 660 of the third upper arm flange portion 650 is configured to communicate with the outside, when injection plastic, etc. is injected to form the upper arm insert 800, the injection plastic is formed in the upper arm lip. The rigidity of the third upper arm flange portion 650 can be further improved by flowing into and filling the space portion 660 through the cess 652, and the space portion 660 of the third upper arm flange portion 650 can be further improved. As the inner and outer upper arm inserts 800 are integrally formed and hardened, the upper arm inserts 800 can be more firmly coupled to the upper arm body portion 600.

Although the present invention has been described above with reference to specific details such as specific components and limited examples, these examples are provided only to facilitate a more general understanding of the present invention, and the present invention is not limited thereto. Anyone with ordinary knowledge in the relevant technical field can make various modifications and variations from this description.

Therefore, the spirit of the present invention should not be limited to the above-described embodiments, and all modifications equivalent or equivalent to the claims as well as the following claims fall within the scope of the spirit of the present invention. something to do.

100: Lower arm for vehicle
200: Lower arm body part
210: Lower arm base plate
212: Through hole (formed in lower arm base plate)
220: Lower arm flange part
230: First lower arm flange part
232: Recess (formed in the first lower arm flange portion)
240: Second lower arm flange part
250: Third lower arm flange part
260: Space portion (formed in the first lower arm flange portion)
270: Space portion (formed in the second lower arm flange portion)
280: Space portion (formed in the second lower arm flange portion)
290: Welded portion (of the first lower arm flange portion)
300: Lower arm mounting part
310: First lower arm mounting portion
320: Second lower arm mounting portion
330: Third lower arm mounting portion
400: Lower arm insert
500: Upper arm for vehicle
600: Upper arm body part
610: Upper arm base plate
612: Through hole (formed in the upper arm base plate)
620: Upper arm flange part
630: First upper arm flange part
640: Second upper arm flange part
650: Third upper arm flange part
652: Recess (formed in the third upper arm flange portion)
660: Space portion (formed in the third upper arm flange portion)
670: Space portion (formed in the first upper arm flange portion)
680: Space portion (formed in the second upper arm flange portion)
690: Welded portion (of the third upper arm flange portion)
700: Upper arm mounting part
710: First upper arm mounting portion
720: Second upper arm mounting portion
730: Third upper arm mounting portion
800: Upper arm insert

Claims (22)

It is a vehicle lower arm (100) used in the vehicle suspension system,
A lower arm body portion 200 forming the basic body of the lower arm 100 for a vehicle,
It includes a lower arm mounting portion 300 formed at one end of the lower arm body portion 200 and used to connect the lower arm 100 for a vehicle to the wheel or body of the vehicle,
The lower arm body portion 200 includes a lower arm base plate 210 located at the center and a lower arm flange portion 220 formed by bending an end of the lower arm base plate 210,
All or part of the lower arm flange portion 220 is formed to have a tubular cross-sectional structure with a space formed at the center,
The tubular cross-sectional structure formed in the lower arm flange portion 220 is formed by bending the end of the lower arm base plate 210 and then attaching the end to the lower arm base plate 210 or another part of the lower arm flange portion 220. It is formed by placing it adjacent to,
The lower arm mounting portion 300 includes a first lower arm mounting portion 310 used to connect the vehicle lower arm 100 to the wheel of the vehicle, and a first lower arm mounting portion 310 used to connect the vehicle lower arm 100 to the vehicle body. Includes a second lower arm mounting portion 320 and a third lower arm mounting portion 330,
The lower arm flange portion 220 includes a first lower arm flange portion 230 extending between the first lower arm mounting portion 310 and the second lower arm mounting portion 320, and a second lower arm mounting portion 320. A second lower arm flange portion 240 extending between the third lower arm mounting portion 330, and a third lower arm flange portion extending between the third lower arm mounting portion 330 and the first lower arm mounting portion 310. Contains (250),
The first lower arm flange portion 230 is formed to have a longer length than the second lower arm flange portion 240 and the third lower arm flange portion 250,
All or part of the first lower arm flange portion 230 is formed to have a tubular cross-sectional structure with a space formed at the center,
The tubular cross-sectional structure formed in the first lower arm flange portion 230 is formed by bending the end of the lower arm base plate 210 and then attaching the end to the lower arm base plate 210 or the first lower arm flange portion 230. ) is formed by placing it adjacent to other parts of the
The second lower arm flange portion 240 and the third lower arm flange portion 250 form a space between the lower arm base plate 210 and have a plane in a different direction from the lower arm base plate 210. Formed by bending to extend to
Lower arm for vehicle. delete According to paragraph 1,
The end of the first lower arm flange portion 230, which forms a tubular cross-sectional structure, is welded and joined to the lower arm base plate 210 or another portion of the first lower arm flange portion 230 while being adjacent to the other portion. felled,
Lower arm for vehicle. delete According to paragraph 1,
One or more lower arm recesses 232 are provided on one side of the first lower arm flange portion 230, which forms a tubular cross-sectional structure, and are spaced apart from each other.
Lower arm for vehicle. According to clause 5,
The space formed at the center of the tubular cross-sectional structure by the lower arm recess 232 provided in the first lower arm flange portion 230 is configured to communicate with the outside.
Lower arm for vehicle. According to clause 6,
The lower arm body portion 200 is further provided with a reinforcement sheet 280,
Lower arm for vehicle. In clause 7,
The reinforcement sheet 280 includes a first reinforcement sheet 282 mounted adjacent to the second lower arm mounting part 320 and a second reinforcement sheet 284 mounted adjacent to the third lower arm mounting part 330. containing,
Lower arm for vehicle. According to clause 8,
Further comprising a lower arm insert 400 made of injection molded plastic coupled to and mounted on the lower arm body portion 200,
Lower arm for vehicle. According to clause 9,
The lower arm insert 400 includes a lower arm insert base portion 410 that is closely coupled to the lower arm base plate 210 of the lower arm body portion 200, and a lower arm insert base portion 410 of the lower arm body portion 200. It includes a lower arm insert flange portion 420 coupled adjacent to the arm flange portion 220,
The lower arm insert 400 is configured to fill the space located at the center of the tubular cross-sectional structure formed in the first lower arm flange portion 230 and to be integrally formed inside and outside the space,
Lower arm for vehicle. According to clause 10,
The lower arm insert 400 is provided with a plurality of lower arm insert reinforcement ribs 490,
Lower arm for vehicle. According to clause 11,
The lower arm base plate 210 is provided with one or more through holes,
The lower arm insert 400 is configured to be inserted into and fill a through hole formed in the lower arm base plate 210 and form a lower arm insert coupling flange 492 extending around the through hole.
Lower arm for vehicle. It is a vehicle upper arm (500) used in the vehicle suspension system,
An upper arm body portion 600 forming the basic body of the upper arm 500 for a vehicle,
It includes an upper arm mounting portion 700 formed at one end of the upper arm body portion 600 and used to connect the vehicle upper arm 500 to the wheel or body of the vehicle,
The upper arm body portion 600 includes an upper arm base plate 610 located at the center and an upper arm flange portion 620 formed by bending an end of the upper arm base plate 610,
All or part of the upper arm flange portion 620 is formed to have a tubular cross-sectional structure with a space formed at the center,
The tubular cross-sectional structure formed in the upper arm flange portion 620 is formed by bending the end of the upper arm base plate 610 and then attaching the end to the upper arm base plate 610 or another part of the upper arm flange portion 620. It is formed by placing it adjacent to,
The upper arm mounting portion 700 includes a first upper arm mounting portion 710 used to connect the upper arm 500 for a vehicle to the wheel of a vehicle, and a first upper arm mounting portion 710 used to connect the upper arm 500 for a vehicle to the body of a vehicle. Includes a second upper arm mounting portion 720 and a third upper arm mounting portion 730,
The upper arm flange portion 620 includes a first upper arm flange portion 630 extending between the first upper arm mounting portion 710 and the second upper arm mounting portion 720, a first upper arm mounting portion 710, and A second upper arm flange portion 640 extending between the third upper arm mounting portion 730, and a third upper arm flange portion extending between the second upper arm mounting portion 720 and the third upper arm mounting portion 730. Contains (650),
All or part of the third upper arm flange portion 650 is formed to have a tubular cross-sectional structure with a space formed at the center,
The tubular cross-sectional structure formed in the third upper arm flange portion 650 is formed by bending the end of the upper arm base plate 610 and then attaching the end to the upper arm base plate 610 or the third upper arm flange portion 650. ) is formed by placing it adjacent to other parts of the
The first upper arm flange portion 630 and the second upper arm flange portion 640 form a space between the upper arm base plate 610 and form a plane in a different direction from the upper arm base plate 610. Formed by bending to extend to
Upper arm for vehicle. delete According to clause 13,
The end of the third upper arm flange portion 650, which forms a tubular cross-sectional structure, is welded and joined to the upper arm base plate 610 or another portion of the third upper arm flange portion 650 while being adjacent to the other portion. felled,
Upper arm for vehicle. delete According to clause 13,
One or more upper arm recesses 652 arranged to be spaced apart from each other are provided on one side of the third upper arm flange portion 650, which forms a tubular cross-sectional structure.
Upper arm for vehicle. According to clause 17,
The space formed at the center of the tubular cross-sectional structure by the upper arm recess 652 provided in the third upper arm flange portion 650 is configured to communicate with the outside,
Upper arm for vehicle. According to clause 18,
Further comprising an upper arm insert 800 made of injection molded plastic coupled to and mounted on the upper arm body portion 600,
Upper arm for vehicle. According to clause 19,
The upper arm insert 800 includes an upper arm insert base portion 810 that is closely coupled to the upper arm base plate 610 of the upper arm body portion 600, and an upper portion of the upper arm body portion 600. It includes an upper arm insert flange portion 820 coupled adjacent to the arm flange portion 620,
The upper arm insert 800 is configured to fill the space located at the center of the tubular cross-sectional structure formed in the third upper arm flange portion 850 and to be integrally formed inside and outside the space,
Upper arm for vehicle. According to clause 20,
The upper arm insert 800 is provided with a plurality of upper arm insert reinforcement ribs 890,
Upper arm for vehicle. According to clause 21,
The upper arm base plate 610 is provided with one or more through holes,
The upper arm insert 800 is configured to be inserted into and fill a through hole formed in the upper arm base plate 610 and form an upper arm insert coupling flange 892 extending around the through hole.
Upper arm for vehicle.

Images