Suspension for vehicle

Abstract

A suspension for a vehicle includes: a lower arm portion; an elastic part mounted above the lower arm part, the lower arm part being elastically deformable; a vehicle body part mounted above the elastic part; a first pad portion interposed between the lower arm portion and the elastic portion and including an elastically deformable material; and a second pad portion interposed between the elastic portion and the vehicle body portion and including an elastically deformable material. According to the present disclosure, since the elastic portion can elastically deform and reduce the weight, it is possible to reduce the weight of the vehicle while reducing vibration of the vehicle.

Description

Technical Field

[0001] Exemplary embodiments of the present disclosure relate to a suspension for a vehicle, and more particularly, to a suspension for a vehicle that can reduce the weight of the vehicle through an elastic portion including a composite material and can be applied to a narrow space. Background Art

[0002] In the conventional art, in a suspension for a vehicle, a coil spring made of a steel material is applied to a chassis module of a rear wheel.

[0003] As vehicle weight increases, the outer diameter of coil springs made of steel needs to be increased to support the greater weight. This increase in outer diameter can cause interference with surrounding components.

[0004] Furthermore, the coil spring made of steel has problems in that, due to the nature of the material, the steel of the coil spring is heavier than another lightweight material and it is difficult to use the coil spring in a narrow space. Therefore, there is a need to improve these problems.

[0005] The background art of the present disclosure is disclosed in Korean Patent Application Publication No. 10-2022-0157074 (registered on November 29, 2022, and entitled “Spring Connector for Suspension of Vehicle”). Utility Model Content

[0006] Various embodiments relate to a suspension for a vehicle, which can reduce the weight of the vehicle by including an elastic portion of a composite material and can be applied to a narrow space.

[0007] In one embodiment, a suspension for a vehicle may include: a lower arm portion; an elastic portion installed above the lower arm portion, the lower arm portion being elastically deformable; a body portion installed above the elastic portion; a first pad portion interposed between the lower arm portion and the elastic portion and including an elastically deformable material; and a second pad portion interposed between the elastic portion and the body portion and including an elastically deformable material.

[0008] The elastic portion may include: a first elastic fixing portion, which is mounted on the first pad portion; a second elastic fixing portion, which is spaced apart from the first elastic fixing portion and has a second pad portion mounted on the second elastic fixing portion; and a folding portion, which has a first side connected to the first elastic fixing portion and a second side connected to the second elastic fixing portion, and the folding portion can be elastically deformed.

[0009] The folded portion may be folded at least once.

[0010] The folding portion may include: a folding body portion, which is arranged in multiples between a first elastic fixing portion and a second elastic fixing portion so that the multiple folding body portions are spaced apart from each other; a folding connection portion, which is configured to connect the first elastic fixing portion to the folding body portion, or to connect the second elastic fixing portion to the folding body portion; and a composite material portion, which is mounted on the folding body portion and includes a composite material.

[0011] The folding body portion may include: a folding plate portion, which is arranged in multiples between the first elastic fixing portion and the second elastic fixing portion so that the multiple folding plate portions are spaced apart from each other; and a folding hole portion formed in the folding plate portion so that the folding hole portion penetrates the folding plate portion.

[0012] The folding hole portion may be arranged in plural in the width direction of the folding plate portion.

[0013] The composite material portion may include a composite material body portion installed on one surface of the folded body portion; and a composite material side portion configured to extend from the composite material body portion to surround a side surface of the folded body portion.

[0014] The folding connection portion may have a curved shape in which the folding connection portion protrudes to an outside of the folding body portion.

[0015] The folding body portion and the folding connection portion may both be made of steel material, and the composite material portion may be made of glass fiber reinforced plastic (GFRP) material.

[0016] The first pad portion may include: a first pad body portion, which is located in the lower arm portion; one or more first pad protrusions, which are formed in a first surface of the first pad body portion and are respectively inserted into one or more lower arm groove portions of the lower arm portion; and a first pad burring portion, which is formed on a second surface of the first pad body portion, is configured to surround the lower arm protrusions of the lower arm portion, and is inserted into the elastic portion.

[0017] The second pad portion may include a second pad body portion configured to contact the vehicle body portion, and a second pad cuff portion formed on one surface of the second pad body portion, configured to surround a vehicle body protrusion of the vehicle body portion, and inserted into the elastic portion.

[0018] According to the suspension for a vehicle of the embodiment of the present disclosure, since the elastic portion is elastically deformable and can be made lightweight, it is possible to reduce the weight of the vehicle while reducing vibration of the vehicle.

[0019] Also, according to the embodiment of the present disclosure, since the elastic portion includes the steel material and the composite material, it is possible to ensure a gap with surrounding components while maintaining rigidity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a perspective view schematically illustrating a suspension for a vehicle according to an embodiment of the present disclosure.

[0021] Figure 2 is an assembled perspective view schematically showing a suspension for a vehicle according to an embodiment of the present disclosure.

[0022] Figure 3 is a perspective view schematically illustrating an elastic portion according to an embodiment of the present disclosure.

[0023] Figure 4 is an assembled perspective view schematically illustrating an elastic portion according to an embodiment of the present disclosure.

[0024] Figure 5 It is along Figure 3 Schematic cross-sectional view taken along line AA in FIG.

[0025] Figure 6 is a perspective view schematically illustrating a composite material portion according to an embodiment of the present disclosure.

[0026] Figure 7 is an assembled perspective view schematically illustrating a lower arm portion and a first pad portion according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0027] Hereinafter, a suspension for a vehicle according to an embodiment of the present disclosure will be described with reference to the accompanying drawings. In the process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for the purpose of clarity and ease of explanation.

[0028] Furthermore, the terms to be described below have been defined by considering their functions in the present disclosure and may be changed according to the intention or practice of the user or operator. Therefore, these terms should be defined based on the overall content of this specification.

[0029] Figure 1 is a perspective view schematically illustrating a suspension for a vehicle according to an embodiment of the present disclosure. Figure 2 is an assembled perspective view schematically showing a suspension for a vehicle according to an embodiment of the present disclosure. Figure 3 is a perspective view schematically illustrating an elastic portion according to an embodiment of the present disclosure. Figure 4 is an assembled perspective view schematically illustrating an elastic portion according to an embodiment of the present disclosure. Figure 5 It is along Figure 3 Schematic cross-sectional view taken along line AA in FIG. Figure 6 is a perspective view schematically illustrating a composite material portion according to an embodiment of the present disclosure. Figure 7 is an assembled perspective view schematically illustrating a lower arm portion and a first pad portion according to an embodiment of the present disclosure.

[0030] refer to Figures 1 to 7 , a suspension for a vehicle according to an embodiment of the present disclosure may include a lower arm portion 100 , an elastic portion 200 , a vehicle body portion 300 , a first pad portion 400 , and a second pad portion 500 .

[0031] The lower arm 100 may refer to an arm disposed at the lower side of a vehicle. The lower arm 100 may be connected to a cross member via a steering knuckle. In an embodiment of the present disclosure, the lower arm 100 may be applied to a chassis module of a rear wheel of a vehicle.

[0032] The elastic portion 200 is mounted above the lower arm portion 100 (for example, at Figure 1 and Figure 2 The elastic portion 200 can reduce the impact on the vehicle by being elastically deformed.

[0033] The body portion 300 may be mounted above the elastic portion 200 (eg, at Figure 1 and Figure 2 The vehicle body portion 300 may form a frame of the vehicle.

[0034] The first cushion portion 400 is interposed between the lower arm portion 100 and the elastic portion 200 and may include an elastically deformable material. The first cushion portion 400 may include rubber, silicone, or urethane as the elastically deformable material.

[0035] The second pad portion 500 is interposed between the elastic portion 200 and the vehicle body portion 300 and may include an elastically deformable material. The second pad portion 500 may include rubber, silicone, or polyurethane as the elastically deformable material.

[0036] The elastic portion 200 may include a first elastic fixing portion 210 , a second elastic fixing portion 220 , and a folding portion 230 .

[0037] The first elastic fixing portion 210 may be mounted on the first cushion portion 400. The first elastic fixing portion 210 may be supported and fixed by the first cushion portion 400.

[0038] The first elastic fixing portion 210 may include a first elastic fixing body portion 211 and a first elastic flange portion 213. The first elastic fixing body portion 211 may be formed by a flat plate penetrating a central portion. The first elastic fixing body portion 211 may be located in the first pad body portion 410 of the first pad portion 400.

[0039] The first elastic fixing body portion 211 may be connected to the folding body portion 240 , which is adjacent to the upper side of the first elastic fixing body portion 211 , through the folding connection portion 250 .

[0040] The first elastic flange portion 213 may be formed to protrude toward the folding body portion 240 of the folding portion 230 by a flange process, and the folding body portion 240 of the folding portion 230 is adjacent to the upper side of the first elastic fixing body portion 211 formed to penetrate (for example, at Figure 2 The first elastic cuff portion 213 may surround an outer side of the first cushion cuff portion 430 of the first cushion portion 400 .

[0041] The second elastic fixing portion 220 is spaced apart from the first elastic fixing portion 210. The second pad portion 500 may be mounted on the second elastic fixing portion 220. The second elastic fixing portion 220 may be spaced apart from the first elastic fixing portion 210 and disposed above the first elastic fixing portion 210 (e.g., at Figure 2 The second cushion portion 500 may be supported and fixed to the second elastic fixing portion 220 .

[0042] The second elastic fixing body portion 221 may be connected to the folding body portion 240 , which is adjacent to the lower side of the second elastic fixing body portion 221 , through the folding connection portion 250 .

[0043] The second elastic fixing portion 220 may include a second elastic fixing body portion 221 and a second elastic flange portion 223. The second elastic fixing body portion 221 may be formed of a flat plate with a central portion formed as a penetration. The second pad body portion 510 of the second pad portion 500 may be located in the second elastic fixing body portion 221.

[0044] The second elastic flange portion 223 may be formed to protrude toward the folding body portion 240 of the folding portion 230 by a flange process, and the folding body portion 240 of the folding portion 230 is adjacent to the lower side of the second elastic fixing body portion 221 formed to penetrate (for example, at Figure 2 The second elastic cuff portion 223 may surround the outer side of the second cushion cuff portion 520 of the second cushion portion 500 .

[0045] The folding portion 230 has one side connected to the first elastic fixing portion 210 (ie, Figure 2 ) and the other side connected to the second elastic fixing portion 220 (ie, the lower side of the folded portion 230 in FIG. Figure 2 The folding portion 230 may be folded at least once and may be elastically deformable.

[0046] The folding portion 230 may be formed to be folded at least once, that is, bent multiple times in a Z-shape. The folding portion 230 may be formed to be folded at least once, and may be bent in the up and down directions (e.g., in the Figure 2 The folding portion 230 can reduce the impact on the vehicle by being elastically deformable in the up and down directions.

[0047] The folding portion 230 may include a folding body portion 240, a folding connection portion 250, and a composite material portion 260. The folding body portion 240 may be arranged in plurality between the first elastic fixing portion 210 and the second elastic fixing portion 220, such that the plurality of folding body portions 240 are spaced apart from each other. The plurality of folding body portions 240 may be connected by the folding connection portion 250.

[0048] The folding body portion 240 may include a folding plate portion 241 and a folding hole portion 243. The folding plate portion 241 may be arranged in plurality between the first elastic fixing portion 210 and the second elastic fixing portion 220, such that the plurality of folding plate portions 241 are spaced apart from each other. The folding plate portion 241 may be formed of a plurality of flat plates arranged between the first elastic fixing portion 210 and the second elastic fixing portion 220.

[0049] Composite material portion 260 may be positioned within folded panel portion 241. Composite material portion 260 may simply remain within folded panel portion 241, or may be coupled to folded panel portion 241 such that composite material portion 260 is securely fastened to folded panel portion 241. Alternatively, composite material portion 260 may be molded and bonded to folded panel portion 241.

[0050] refer to Figure 4 The folding hole portion 243 may be formed in the folding plate portion 241 so that the folding hole portion 243 penetrates the folding plate portion 241. The folding hole portion 243 may be formed in the length direction of the folding plate portion 241 (ie, Figure 4 The folded hole portion 243 is formed in a long hole shape in the horizontal direction (in the horizontal direction) so that the folded hole portion 243 penetrates the folded plate portion 241. The folded hole portion 243 is formed in the folded plate portion 241 so that the folded hole portion 243 penetrates the folded plate portion 241, and thus the strength of the folded body portion 240 can be increased while reducing the weight of the folded body portion 240 compared to a solid shape having the same weight.

[0051] The folding hole portion 243 may be formed in the width direction of the folding plate portion 241 (ie, Figure 4 The plurality of folding hole portions 243 are formed in the width direction of the folding plate portion 241 so that the plurality of folding hole portions 243 penetrate the folding plate portion 241, and thus deformation (such as twisting) in a specific portion can be prevented while reducing the weight of the folding body portion 240.

[0052] The folding connection part 250 may connect the first elastic fixing part 210, the folding body part 240, or the second elastic fixing part 220 to the adjacent folding body part 240. The folding connection part 250 may be continuously formed in the first elastic fixing part 210, the folding body part 240, or the second elastic fixing part 220.

[0053] That is, the folding connection portion 250 may connect the first elastic fixing portion 210 and the folding body portion 240 adjacent to the upper side of the first elastic fixing portion 210. Alternatively, the folding connection portion 250 may connect the folding body portion 240 and the second elastic fixing portion 220 adjacent to the upper and lower sides of the folding body portion 240 and the first elastic fixing portion 210. Alternatively, the folding connection portion 250 may connect the second elastic fixing portion 220 and the folding body portion 240 adjacent to the lower side of the second elastic fixing portion 220.

[0054] By connecting the first elastic fixing portion 210, the folding body portion 240 or the second elastic fixing portion 220 to the folding body portion 240 adjacent to the first elastic fixing portion 210 or the second elastic fixing portion 220, the folding connection portion 250 can provide elastic force to the first elastic fixing portion 210, the folding body portion 240 or the second elastic fixing portion 220, wherein the interval between the first elastic fixing portion 210, the folding body portion 240 or the second elastic fixing portion 220 becomes narrower or wider in the upper and lower directions thereof.

[0055] The folding connection part 250 may be a curved shape in which it protrudes outside the folding body part 240. The folding connection part 250 has a curved shape at the end of the folding body part 240 and thus can prevent the folding body part 240 from being damaged due to stress other than elastic force.

[0056] The folding connection parts 250 may be alternately arranged on left and right sides thereof at an end portion of the folding body part 240 in an up-down direction thereof.

[0057] The composite material portion 260 is mounted on the folding body portion 240 and may include a composite material. The composite material portion 260 may be formed in a size that can cover the folding hole portion 243 of the folding body portion 240. By covering the folding hole portion 243 formed to penetrate, the composite material portion 260 can reduce stress applied to the folding body portion 240.

[0058] The composite material portion 260 may be mounted on the folded body portion 240 by prepreg compression molding (PCM).

[0059] The composite material portion 260 may include a composite material body portion 261 and a composite material side portion 263. The composite material body portion 261 may be mounted on one surface (ie, Figure 4 On the upper side of the folding body portion 240).

[0060] The composite material side portions 263 may extend from both sides of the composite material body portion 261 and surround the sides of the folded body portion 240. The composite material side portions 263 may prevent the folded body portion 240 from being folded in the width direction (i.e., Figure 4 Detach in direction W).

[0061] The folding body portion 240 and the folding connection portion 250 each include a steel material. The composite material portion 260 may include a glass fiber reinforced plastic (GFRP) material.

[0062] The folding body portion 240 and the folding connection portion 250 are both made of steel and can maintain a predetermined rigidity. The composite material portion 260 includes a GFRP material as a composite material, and thus, compared to a case where the composite material portion 260 is made of steel, it is possible to reduce the weight of the folding body portion 240 while reducing the stress applied to the folding hole portion 243 of the folding body portion 240.

[0063] The first pad portion 400 may include a first pad body portion 410, one or more first pad protrusions 420, and a first pad cuff portion 430. The first pad body portion 410 may be located on one surface of the lower arm portion 100 (ie, Figure 2 and Figure 7 The first pad body portion 410 includes an elastically deformable material and can be elastically deformed while being in contact with the lower arm portion 100 and the first elastic fixing portion 210 of the elastic portion 200.

[0064] The first pad protrusion 420 may be formed on the first surface (ie, Figure 2 and Figure 7 The first pad protrusions 420 are respectively inserted into the lower arm grooves 110 of the lower arm 100. The first pad protrusions 420 each include an elastically deformable material and can be elastically deformed while being inserted into the lower arm grooves 110 of the lower arm 100.

[0065] The lower arm groove portion 110 of the lower arm portion 100 may be concavely formed, and the first pad protrusions 420 are inserted into the lower arm groove portion 110. The lower arm groove portion 110 may be formed to have a size and number corresponding to those of the first pad protrusions 420.

[0066] The first gasket flange portion 430 may be formed on the second surface (ie, Figure 2 and Figure 7 The first pad cuff portion 430 is formed on an upper side of the first pad body portion 410 in the lower arm portion 100 so that the first pad cuff portion 430 protrudes from the first pad body portion 410. The first pad cuff portion 430 may surround the lower arm protrusion 120 of the lower arm portion 100 and may be inserted into the elastic portion 200. The lower arm protrusion 120 may be formed at a central portion of the lower arm portion 100 so that the lower arm protrusion 120 protrudes from the lower arm portion 100.

[0067] The first pad cuff portion 430 surrounds the outer side of the lower arm protrusion 120 and can be inserted into the first elastic cuff portion 213 of the first elastic fixing portion 210 of the elastic portion 200. The first pad cuff portion 430 includes an elastically deformable material and can be elastically deformed between the lower arm protrusion 120 and the first elastic cuff portion 213.

[0068] The second pad portion 500 may include a second pad body portion 510 and a second pad flange portion 520. The second pad body portion 510 may be aligned with one surface of the vehicle body portion 300 (ie, Figure 2 The second pad body portion 510 includes an elastically deformable material and may be elastically deformed while being in contact with the body portion 300 and the second elastic fixing portion 220 of the elastic portion 200.

[0069] The second gasket flange portion 520 may be formed on one surface of the second gasket body portion 510 (ie, Figure 2 The second pad cuff portion 520 is formed on the lower side of the second pad body portion 510 in the vehicle body portion 300 so that the second pad cuff portion 520 protrudes from the second pad body portion 510. The second pad cuff portion 520 surrounds the vehicle body protrusion 310 of the vehicle body portion 300 and can be inserted into the elastic portion 200. The vehicle body protrusion 310 can be formed at the center portion of the vehicle body portion 300 so that the vehicle body protrusion 310 protrudes from the vehicle body portion 300.

[0070] The second cushion cuffing portion 520 surrounds the outer side of the vehicle body protrusion 310 and can be inserted into the second elastic cuffing portion 223 of the second elastic fixing portion 220 of the elastic portion 200. The second cushion cuffing portion 520 includes an elastically deformable material and can be elastically deformed between the vehicle body protrusion 310 and the second elastic cuffing portion 223.

[0071] The following describes an assembling process of the suspension for a vehicle having the aforementioned configuration according to an embodiment of the present disclosure.

[0072] The first pad protrusion 420 of the first pad portion 400 may be inserted into the lower arm groove portion 110 of the lower arm portion 100 . The first pad cuff portion 430 of the first pad portion 400 may surround an outer side of the lower arm protrusion 120 of the lower arm portion 100 .

[0073] The second pad cuff portion 520 of the second pad portion 500 may surround a side surface of the vehicle body protrusion 310 of the vehicle body portion 300 .

[0074] The first elastic fixing portion 210 and the second elastic fixing portion 220 of the elastic portion 200 may be in contact with the first pad portion 400 and the second pad portion 500 , respectively.

[0075] The first gasket cuffing portion 430 of the first gasket portion 400 may be inserted into and mounted on the first elastic cuffing portion 213 of the first elastic fixing portion 210 .

[0076] The second gasket cuff portion 520 of the second gasket portion 500 may be inserted into and mounted on the second elastic cuff portion 223 of the second elastic fixing portion 220 .

[0077] The suspension for a vehicle that has been assembled through the aforementioned process can reduce impact on the vehicle because the folded portion 230 of the elastic portion 200 is elastically deformed up and down when the vehicle travels.

[0078] According to the suspension for a vehicle of the embodiment of the present disclosure, since the elastic portion 200 can be elastically deformed and reduced in weight, it is possible to reduce the weight of the vehicle while reducing vibration of the vehicle.

[0079] Also, according to the embodiment of the present disclosure, since the elastic portion 200 includes the steel material and the composite material, it is possible to ensure a gap between the elastic portion 200 and surrounding components while maintaining the rigidity of the elastic portion 200 .

[0080] Although the present disclosure has been described with reference to the embodiments shown in the drawings, the embodiments of the present disclosure are for illustrative purposes only, and those skilled in the art will appreciate that various modifications and other equivalent embodiments are possible based on the embodiments.

Claims

1. A suspension for a vehicle, characterized in that: include: lower arm; an elastic portion installed above the lower arm portion, wherein the lower arm portion is elastically deformable; a body portion mounted above the elastic portion; a first pad portion, which is interposed between the lower arm portion and the elastic portion and includes an elastically deformable material; as well as The second pad portion is interposed between the elastic portion and the vehicle body portion and includes an elastically deformable material.

2. The suspension for a vehicle according to claim 1, characterized in that The elastic portion includes: a first elastic fixing portion, mounted on the first pad portion; a second elastic fixing portion spaced apart from the first elastic fixing portion and having the second pad portion mounted thereon; and A folded portion has a first side connected to the first elastic fixing portion and a second side connected to the second elastic fixing portion, and the folded portion is elastically deformable.

3. The suspension for a vehicle according to claim 2, characterized in that The folded portion is folded at least once.

4. The suspension for a vehicle according to claim 3, characterized in that The folding portion includes: a folding body portion, which is arranged in plurality between the first elastic fixing portion and the second elastic fixing portion so that the plurality of folding body portions are spaced apart from each other; a folding connection portion configured to connect the first elastic fixing portion to the folding body portion, or to connect the second elastic fixing portion to the folding body portion; and The composite material portion is mounted on the folding body portion and comprises a composite material.

5. The suspension for a vehicle according to claim 4, characterized in that The foldable body portion comprises: a folded plate portion disposed in plurality between the first elastic fixing portion and the second elastic fixing portion such that the plurality of folded plate portions are spaced apart from each other; and A folded hole portion is formed in the folded plate portion such that the folded hole portion penetrates the folded plate portion.

6. The suspension for a vehicle according to claim 5, characterized in that The folding hole portions are arranged in plural in the width direction of the folding plate portion.

7. The suspension for a vehicle according to claim 4, characterized in that The composite material portion comprises: a composite body portion mounted on one surface of the folding body portion; and The composite material side portion is configured to extend from the composite material body portion to surround a side surface of the folded body portion.

8. The suspension for a vehicle according to claim 4, characterized in that The folding connection portion has a curved shape in which the folding connection portion protrudes to an outside of the folding body portion.

9. The suspension for a vehicle according to claim 4, characterized in that: The folding body portion and the folding connection portion are both made of steel material, and The composite material part is made of glass fiber reinforced plastic material.

10. The suspension for a vehicle according to claim 1, wherein The first pad portion includes: a first pad body portion located in the lower arm portion; one or more first pad protrusions formed on a first surface of the first pad body portion and respectively inserted into the one or more lower arm groove portions of the lower arm portion; and A first pad cuff portion is formed on the second surface of the first pad body portion, is configured to surround the lower arm protrusion of the lower arm portion, and is inserted into the elastic portion.

11. The suspension for a vehicle according to claim 1, wherein The second pad portion includes: a second pad body portion configured to contact the vehicle body portion; and A second pad cuff portion is formed on one surface of the second pad body portion, is configured to surround a vehicle body protrusion of the vehicle body portion, and is inserted into the elastic portion.

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