Spring link of suspension for vehicle

Abstract

A spring link for a vehicle suspension is provided. The spring link for a vehicle suspension according to the present invention comprises an upper shell in which an upper first outer region, an upper middle region, and an upper second outer region are arranged in succession, and a lower shell in which a lower first outer region, a lower middle region, and a lower second outer region are arranged in succession, wherein a spring seating portion is installed in the upper middle region and a lower first mounting hole is arranged in the lower middle region.

Description

Technology Field

[0001] The present invention relates to a spring link of a vehicle suspension. Background Technology

[0002] Recently, in order to respond to strengthened environmental regulations resulting from global warming, the lightweighting of components is being recognized as a necessity rather than an option.

[0003] In particular, various methods are being proposed to lighten vehicle suspension components.

[0004] Meanwhile, among vehicle suspension components, the spring link plays a role in supporting and absorbing loads applied from the outside to the wheels during vehicle operation through the coil spring and shock absorber, thereby providing ride comfort for passengers and driving performance for the vehicle.

[0005] Therefore, the spring links must maintain sufficient stiffness and strength. In addition, since the cradle is continuously subjected to external loads from the road surface, it must guarantee a sufficient lifespan to prevent functional degradation during the vehicle's operation.

[0006] In other words, it must simultaneously satisfy the requirements for stiffness, strength, and service life of the spring link.

[0007] Accordingly, there is an urgent need for a method that can achieve maximum weight reduction by applying thin high-strength steel and reducing the number of parts, while sufficiently securing the stiffness, strength, and internal performance of the spring link. The problem to be solved

[0008] The present invention aims to provide a spring link for a vehicle suspension that achieves maximum weight reduction while sufficiently securing the stiffness, strength, and internal performance of the spring link. means of solving the problem

[0009] A spring link for a vehicle suspension according to one embodiment of the present invention relates to a spring link for a vehicle suspension in which a spring link bracket and a knuckle of a rear wheel cradle are connected to each of the first and second ends, respectively, and a coil spring and a shock absorber are mounted in the middle of the first and second ends.

[0010] A spring link of a vehicle suspension may include an upper shell for mounting a coil spring, wherein an upper first outer region, an upper middle region, and an upper second outer region are arranged continuously in the longitudinal direction, and a lower shell coupled to the upper shell, wherein a lower first outer region, a lower middle region, and a lower second outer region are arranged continuously in the longitudinal direction.

[0011] In addition, a spring mounting portion for seating a coil spring is installed in the upper middle area, and a lower first mounting hole for inserting and mounting the spring mounting portion may be arranged in the lower middle area.

[0012] It may include a spacer provided in the central part of the upper intermediate region and for mounting a coil spring.

[0013] The spring seating portion can be formed as a circular flat surface.

[0014] The spring seating portion may have a shape that is concave from the surface of the upper shell toward the rear side relative to the outer surface of the spring seating portion.

[0015] An upper mounting hole for mounting a shock absorber may be provided in the upper first outer region.

[0016] The spacer can be configured as a separate part and fixedly coupled to the center of the spring mounting portion, or the center of the spring mounting portion can be burred to form a flange in the shape of a spacer.

[0017] A lower second mounting hole for mounting a shock absorber may be provided in the lower first outer area.

[0018] A lower third mounting hole for mounting a spring link bracket may be provided in the lower second outer region. Effects of the invention

[0019] According to an embodiment of the present invention, maximum weight reduction can be achieved while sufficiently securing the stiffness, strength, and internal performance of the spring link.

[0020] Accordingly, the coil springs and shock absorbers can sufficiently support and absorb the load applied to the wheels from the outside during vehicle operation, thereby improving the ride comfort of the passengers and the driving performance of the vehicle.

[0021] In addition, through a cross-section formed by the welded joint of the upper shell and the lower shell, the wheel load of the vehicle imposed by the knuckle is properly absorbed by the coil spring and shock absorber or transmitted to the rear wheel cradle, thereby ensuring sufficient rigidity and ensuring durability even under repeated load conditions without the parts collapsing.

[0022] In particular, since the lower first mounting hole is positioned in the lower middle region of the lower shell, the performance of the spring link can be maintained while reducing the overall weight of the spring link. Brief explanation of the drawing

[0023] FIG. 1 is a schematic perspective view illustrating the mounting state of a spring link of a vehicle suspension according to one embodiment of the present invention. FIG. 2 is a combined perspective view of a spring link of a vehicle suspension according to one embodiment of the present invention. FIG. 3 is an exploded perspective view of a spring link of a vehicle suspension according to one embodiment of the present invention. FIG. 4 is a perspective view showing a state in which a lower spring pad is mounted on a spring link of a vehicle suspension according to one embodiment of the present invention. FIG. 5 is a perspective view showing a state in which a coil spring, an upper spring pad, and a lower spring pad are mounted on a spring link of a vehicle suspension according to one embodiment of the present invention. FIG. 6 is a schematic front view illustrating the seating surface position of a spring pad of a spring link of a vehicle suspension according to one embodiment of the present invention. Specific details for implementing the invention

[0024] Hereinafter, embodiments of the present invention are described with reference to the attached drawings so that those skilled in the art can easily implement the present invention. As will be easily understood by those skilled in the art, the embodiments described below may be modified in various forms without departing from the concept and scope of the present invention. Where possible, identical or similar parts are indicated using the same reference numerals in the drawings.

[0025] The technical terms used below are for the reference of specific embodiments only and are not intended to limit the invention. The singular forms used herein include plural forms unless phrases clearly indicate otherwise. The meaning of "comprising" as used in the specification specifies a particular characteristic, area, integer, step, action, element, and / or component, and does not exclude the presence or addition of other particular characteristic, area, integer, step, action, element, component, and / or group.

[0026] All terms used below, including technical and scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms defined in advance are further interpreted to have meanings consistent with relevant technical literature and the present disclosure, and are not interpreted in an ideal or highly formal sense unless otherwise defined.

[0027] FIG. 1 is a schematic perspective view showing the mounting state of a spring link of a vehicle suspension according to one embodiment of the present invention, and FIG. 2 is a combined perspective view of a spring link of a vehicle suspension according to one embodiment of the present invention.

[0028] FIG. 3 is an exploded perspective view of a spring link of a vehicle suspension according to one embodiment of the present invention, and FIG. 4 is a perspective view showing a state in which a lower spring pad is mounted on a spring link of a vehicle suspension according to one embodiment of the present invention.

[0029] FIG. 5 is a perspective view showing a state in which a coil spring, an upper spring pad, and a lower spring pad are mounted on a spring link of a vehicle suspension according to one embodiment of the present invention, and FIG. 6 is a schematic front view for explaining the seating surface position of a spring pad of a spring link of a vehicle suspension according to one embodiment of the present invention.

[0030] Referring to FIGS. 1 to 6, a spring link bracket (11) of a rear cradle (10) can be connected to one end of a spring link (hereinafter referred to as "spring link") (100) of a vehicle suspension according to one embodiment of the present invention.

[0031] Additionally, a knuckle (20) is connected to the other end of the spring link (100), and a coil spring (40) and a shock absorber (30) connected to the vehicle body can be installed in the middle of the first end and the other end of the spring link (100).

[0032] Meanwhile, the spring link (100) may include an upper shell (110) positioned on its upper portion for mounting a coil spring (40), a lower shell (120) positioned on the lower portion of the upper shell (110) for coupling with the upper shell (110), and a spacer (130) provided in the central portion of the upper shell (110) for mounting a lower spring pad (41) of the coil spring (40).

[0033] The upper shell (110), lower shell (120), and spacer (130) of the spring link (100) can be made of high-strength steel with a minimum thin thickness to minimize weight while satisfying durability performance.

[0034] The upper shell (110) and the lower shell (120) can be fixedly joined by welding or the like, but are not limited thereto and can be joined by various other methods.

[0035] The upper shell (110) may have an upper first outer region (A1), an upper middle region (A2), and an upper second outer region (A3) located at one end, a middle region, and the other end, respectively, arranged in the length direction (X).

[0036] Here, the middle part of the upper shell (110) may refer to the area between one end and the other end of the upper shell (110).

[0037] A spring mounting portion (111) for mounting a coil spring (40) may be disposed in the upper middle region (A2) of the upper shell (110).

[0038] The spring seating portion (111) may be made of a circular flat surface, etc., so that the lower part of the coil spring (40) can be firmly seated.

[0039] Additionally, the spring seating portion (111) may have a shape that is concave from the surface of the upper shell (110) toward the back side relative to the outer surface (peripheral surface) (112) of the spring seating portion (111) that is combined with the lower shell (120) so that the lower part of the coil spring (40), i.e., the lower spring pad (41), can be seated more firmly.

[0040] That is, as shown in FIGS. 4 and 5, the central part of the spring seating portion (111) of the upper shell (110) on which the lower spring pad (41) of the coil spring (40) is seated is made of a circular flat surface, and this circular flat surface is stepped downward (in the Z direction of FIG. 3) relative to the outer surface (112) of the spring seating portion (111) which is welded to the lower shell (120).

[0041] In this way, the structure having a step can increase bending resistance against the longitudinal load (X direction in FIG. 3) of the spring pad seating surface (41-1) where the lower spring pad (41) is seated in FIG. 6, when the Z direction position is located below the line connecting the knuckle connection part (A) and the rear wheel cradle connection part (A').

[0042] The upper shell (110) can cover almost all of the surface of the lower shell (120) when combined with the lower shell (120).

[0043] An upper mounting hole (113) for mounting a shock absorber (30) may be provided in the upper first outer region (A1) of the upper shell (110).

[0044] Additionally, the lower shell (120) may have a lower first outer region (B1), a lower middle region (B2), and a lower second outer region (B3) located at one end, a middle region, and the other end, respectively, arranged continuously in the length direction (X).

[0045] Here, the middle portion of the lower shell (120) may refer to the area between one end and the other end of the lower shell (120).

[0046] A lower first mounting hole (121) for inserting and mounting the spring seating portion (111) of the upper shell (110) may be disposed in the central part of the lower intermediate area (B2) of the lower shell (120).

[0047] The lower first mounting hole (121) is formed by penetrating the lower shell (120) with a set size and shape, so as to maintain the rigidity of the spring link (100) without affecting the performance of the spring link (100).

[0048] The lower middle region (B2) of the lower shell (120) may be set such that its width (length in the Y direction of FIG. 3) is wider than that of the lower first outer region (B1) and the lower second outer region (B3), and its height (length in the Z direction of FIG. 3) is lower than that of the lower first outer region (B1) and the lower second outer region (B3).

[0049] That is, based on the lower middle region (B2), the width (length in the Y direction of FIG. 3) can be set to be narrower as it goes toward both ends, namely the lower first outer region (B1) and the lower second outer region (B3), compared to the lower middle region (B2).

[0050] In addition, the height (length in the Z direction of FIG. 3) can be set higher than that of the lower intermediate area (B2) as one moves toward both ends, namely the lower first outer area (B1) and the lower second outer area (B3), relative to the lower intermediate area (B2).

[0051] In this way, the reason for setting the width and height is that a shock absorber (30) is mounted on the lower first outer area (B1) of the lower shell (120), and a spring link bracket (11) is mounted on the lower second outer area (B3).

[0052] Additionally, a knuckle connection part (122) for connecting a knuckle (20) is installed in the lower first outer area (B1), a lower second mounting hole (123) for mounting a shock absorber (30) is arranged in the lower first outer area (B1), and a shock absorber connection part (124) for connecting a shock absorber (30) may be installed in the lower first outer area (B1).

[0053] A lower third mounting hole (125) for mounting a spring link bracket (11) may be provided in the lower second outer area (B3).

[0054] A bush (not shown) is installed at the part connecting the lower shell (120) to the spring link bracket (11), and the bush can be composed of a separate part.

[0055] And, a spacer (130) for fixing and connecting the lower spring pad (41) of the coil spring (40) may be provided in the central part of the spring seating portion (111) of the upper shell (110), that is, the central part of the upper intermediate area (A2).

[0056] The spacer (130) can be configured as a separate part and fixedly connected to the center of the spring seating portion (111) by welding, etc., or the center of the spring seating portion (111) of the upper shell (110) can be burred to form a flange in the shape of a spacer.

[0057] Hereinafter, with reference to FIGS. 1 to 6, the operation of a spring link of a vehicle suspension according to one embodiment of the present invention will be described.

[0058] First, the spring link (100) has a lower shell (120) joined to the lower part of an upper shell (110) positioned at the top by welding or the like.

[0059] In addition, a spacer (130) for fixing and connecting the lower spring pad (41) of the coil spring (40) is provided in the central part of the spring seating portion (111) of the upper shell (110), that is, in the central part of the upper intermediate area (A2).

[0060] At this time, the upper shell (110) has an upper first outer region (A1), an upper middle region (A2), and an upper second outer region (A3) located at one end, a middle part, and the other end in the longitudinal direction (X), respectively, arranged continuously.

[0061] And, the lower shell (120) has a lower first outer region (B1), a lower middle region (B2), and a lower second outer region (B3) located at one end, a middle part, and the other end, respectively, arranged continuously in the length direction (X).

[0062] The lower first outer region (B1), lower middle region (B2), and lower second outer region (B3) of the lower shell (120) are respectively coupled to the upper first outer region (A1), upper middle region (A2), and upper second outer region (A3) of the upper shell (110).

[0063] Additionally, a spring mounting portion (111) for mounting a coil spring (40) is provided in the upper middle area (A2) of the upper shell (110), and since the spring mounting portion (111) is made of a circular flat surface, the lower end of the coil spring (40) can be firmly mounted.

[0064] Also, the spring seating portion (111) is shaped so that it is concave from the surface of the upper shell (110) toward the rear side relative to the outer surface (peripheral surface) (112) of the spring seating portion (111) that is combined with the lower shell (120), so the lower part of the coil spring (40), i.e., the lower spring pad (41), can be seated more firmly.

[0065] That is, the circular flat surface of the spring mounting portion (111) has a step downward (in the Z direction of FIG. 3) compared to the outer surface (112) of the spring mounting portion (111) that is welded to the lower shell (120).

[0066] Accordingly, the Z-direction position of the spring pad seating surface (41-1) on which the lower spring pad (41) is seated is positioned below the line connecting the knuckle connection part (A) and the rear wheel cradle connection part (A') of FIG. 6, thereby increasing the bending resistance against the load in the longitudinal direction (X-direction of FIG. 3) of the spring link (100).

[0067] Additionally, an upper mounting hole (113) for mounting a shock absorber (30) is provided in the upper first outer region (A1) of the upper shell (110), and a lower first mounting hole (121) for inserting and mounting a spring seating portion (111) of the upper shell (110) is provided in the middle portion of the lower middle region (B2) of the lower shell (120).

[0068] Accordingly, the rigidity of the spring link (100) can be maintained without affecting the performance of the spring link (100).

[0069] The lower middle region (B2) of the lower shell (120) has a width (length in the Y direction of FIG. 3) that is wider than the lower first outer region (B1) and lower second outer region (B3), and the lower middle region (B2) has a height (length in the Z direction of FIG. 3) that is lower than the lower first outer region (B1) and lower second outer region (B3).

[0070] That is, based on the lower middle area (B2), the width (length in the Y direction of FIG. 3) is set to be narrower as you go toward both ends, namely the lower first outer area (B1) and the lower second outer area (B3), compared to the lower middle area (B2).

[0071] Accordingly, a shock absorber (30) can be easily mounted on the lower first outer area (B1) of the lower shell (120), and a spring link bracket (11) can be easily mounted on the lower second outer area (B3).

[0072] In addition, a lower second mounting hole (123) for mounting a shock absorber (30) is provided in the lower first outer area (B1), and a lower third mounting hole (125) for mounting a spring link bracket (11) is provided in the lower second outer area (B3).

[0073] In this way, the wheel load of the vehicle imposed by the knuckle (20) is properly absorbed by the coil spring (40) and shock absorber (30) or transmitted to the rear wheel cradle (10) through the cross-section formed by the welded joint of the upper shell (110) and the lower shell (120), thereby ensuring sufficient rigidity and ensuring durability even under repeated load conditions without the parts collapsing.

[0074] In particular, since the lower first mounting hole is positioned in the lower middle region of the lower shell, the performance of the spring link can be maintained while reducing the overall weight of the spring link.

[0075] Although the present disclosure has been described through preferred embodiments as described above, those skilled in the art will readily understand that the present invention is not limited thereto and that various modifications and variations are possible without departing from the scope of the claims set forth below. Explanation of the symbols

[0076] 20: Knuckle 30: Shock absorber 40: Coil spring 100: Spring Link 110: Upper shell 111: Spring seating part 120: Lower shell 130: Spacer

Claims

Claim 1 A spring link of a vehicle suspension, wherein a spring link bracket and a knuckle of a rear wheel cradle are connected to a first end and a second end, respectively, and a coil spring and a shock absorber are mounted in the middle of the first end and the second end, the spring link comprises an upper shell for mounting the coil spring, wherein an upper first outer region, an upper middle region, and an upper second outer region are continuously arranged in the longitudinal direction, and a lower shell coupled to the upper shell, wherein a lower first outer region, a lower middle region, and a lower second outer region are continuously arranged in the longitudinal direction, and a spacer provided in the center of the upper middle region for mounting the coil spring, wherein a spring seating portion for seating the coil spring is installed in the upper middle region, and a lower first mounting hole for inserting and mounting the spring seating portion is arranged in the lower middle region, wherein the spring seating portion is formed of a circular flat surface and has a shape that is concave from the surface of the upper shell toward the rear side relative to the outer circumference of the spring seating portion, and the circular flat surface of the spring seating portion is welded to the lower shell A spring link of a vehicle suspension having a step downward relative to the outer surface, wherein a lower spring pad of the coil spring is fixedly coupled to the spacer, and the position of the spring pad seating surface on which the lower spring pad is seated relative to the height direction of the lower intermediate region is located below the line connecting the knuckle connection part and the rear wheel cradle connection part. Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 A spring link of a vehicle suspension according to claim 1, wherein an upper mounting hole for mounting the shock absorber is disposed in the upper first outer region. Claim 6 A spring link for a vehicle suspension according to claim 1, wherein the spacer is formed as a separate part and fixedly coupled to the center of the spring seating portion, or the center of the spring seating portion is burred to form a flange in the shape of a spacer. Claim 7 A spring link of a vehicle suspension according to claim 1, wherein a lower second mounting hole for mounting the shock absorber is disposed in the lower first outer region. Claim 8 A spring link of a vehicle suspension according to claim 1, wherein a lower third mounting hole for mounting the spring link bracket is disposed in the lower second outer region.

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