lower arm assembly

Abstract

The utility model relates to a lower arm assembly, the lower arm assembly includes: the board along the first axis extension, first branch, connect to the bottom surface of board, and second branch, connect to the bottom surface of board, and second branch with first branch is set up symmetrically relative to the first axis. According to the utility model, through the first branch and second branch connected to the wheel and the body distribution exerted to the weight of board, can realize stable suspension performance.

Description

Technical Field

[0001] Exemplary embodiments of this disclosure relate to a lower arm assembly, and more specifically, to a lower arm assembly for the rear wheel of a vehicle. Background Technology

[0002] Typically, a vehicle's suspension is a device that, when the vehicle is traveling with its axles connected to the body, prevents damage to the vehicle body or cargo and improves ride comfort by preventing vibrations or impacts from the road surface from being directly transmitted to the vehicle body.

[0003] Suspension systems are basically divided into front suspension and rear suspension. The lower control arm of the rear wheel (i.e., one of the links in the rear suspension) serves to support the lateral forces on the vehicle and to support the sprung mass from the spring.

[0004] The background technology disclosed herein is made available in Korean Patent No. 10-0320498 (December 28, 2001, entitled "Rear Suspension System for Vehicles"). Utility Model Content

[0005] Various implementations relate to providing a lower arm assembly capable of stably supporting the lateral forces and sprung mass of a vehicle.

[0006] In one embodiment, the lower arm assembly includes: a plate extending along a first axis; a first leg connected to the bottom surface of the plate; and a second leg connected to the bottom surface of the plate, wherein the second leg and the first leg are symmetrically arranged with respect to the first axis.

[0007] The plate may include: a first plate, disposed parallel to a first axis; a second plate, extending from one end of the first plate and disposed at an upward inclination relative to the first axis; and a third plate, extending from the other end of the first plate and disposed at an upward inclination relative to the first axis.

[0008] The first leg may include a first central portion connected to a first plate, a first outer connecting portion connected to a second plate, and a first inner connecting portion connected to a third plate. The second leg may include: a second central portion connected to the first plate and disposed parallel to the first central portion; a second outer connecting portion connected to the second plate and disposed parallel to the first outer connecting portion; and a second inner connecting portion connected to the third plate and disposed parallel to the first inner connecting portion.

[0009] Each of the intervals between the first outer connecting portion and the second outer connecting portion, and between the first inner connecting portion and the second inner connecting portion, may be smaller than the interval between the first central portion and the second central portion.

[0010] The interval between the first external connecting part and the second external connecting part can be smaller than the interval between the first internal connecting part and the second internal connecting part.

[0011] The first leg may include: a first outer extension disposed between the first central portion and the first outer connecting portion; and a first inner extension disposed between the first central portion and the first inner connecting portion. The second leg may include: a second outer extension disposed between the second central portion and the second outer connecting portion; and a second inner extension disposed between the second central portion and the second inner connecting portion.

[0012] The lower arm assembly may also include an outer groove configured to penetrate the second plate and disposed between the first leg and the second leg; and an inner groove configured to penetrate the third plate and disposed between the first leg and the second leg.

[0013] The lower arm assembly may also include a spring pad that is attached to the top surface of the first plate.

[0014] The plate may also include an insertion hole penetrating the first plate. The spring pad may include: a first pad body, seated on the top surface of the first plate; and a second pad body, extending from the first pad body and inserted into the insertion hole.

[0015] The plate may also include a retaining hole configured to penetrate the first plate and spaced apart from an insertion hole. The spring pad may also include a retaining member extending from the first pad body and inserted into the retaining hole.

[0016] The central axis of the insertion hole may intersect the first axis perpendicularly at the intersection point. The fixing hole may include: a first fixing hole disposed on the first axis; and a plurality of second fixing holes spaced apart from the first fixing hole in a cylindrical direction centered on the intersection point.

[0017] The fixing members may include: a first fixing member extending from the first pad body and inserted into the first fixing hole; and a second fixing member extending from the first pad body and inserted into the second fixing hole.

[0018] The first fixing member may include: a first fixing body extending from the bottom surface of the first pad body; and a first hook disposed at the end of the first fixing body and configured to contact the bottom surface of the first plate.

[0019] The lower arm assembly may also include: a bottom cover disposed below the plate and configured to cover the first and second legs; and a fastening member configured to connect the plate and the bottom cover.

[0020] The bottom cover may include: a cover body, configured to face the bottom surface of the plate and spaced apart from the plate; and a first seat portion, configured to project from the cover body toward the plate. Fastening members may include: one or more fixing flanges configured to extend from the plate and contact the first seat portion; and a flange fixing member configured to fix the fixing flanges to the first seat portion.

[0021] The bottom cover may further include: a second seat configured to project from the cover body toward the plate and spaced apart from the first seat; and a grooved member disposed on the second seat. The fastening member may further include one or more insertion flanges, each insertion flange configured to extend from the plate and insert into the grooved member.

[0022] The fixed flange can be configured to face the first seat when the insert flange is inserted into the slotted part.

[0023] The number of inserted flanges can be greater than the number of fixed flanges.

[0024] The slotted component may include an opening perpendicular to the first direction. When the plate moves in the first direction, an insertion flange can pass through the opening and be inserted into the slotted component.

[0025] The grooved member may also include a stop that is spaced apart from the opening in a first direction and is configured to face the end of the insertion flange.

[0026] According to embodiments of this disclosure, stable suspension performance can be achieved by distributing the weight applied to the plate through a first and second outrigger connected to the wheel and the vehicle body.

[0027] According to embodiments of this disclosure, since the interval between the first outer connecting portion and the second outer connecting portion and the interval between the first inner connecting portion and the second inner connecting portion are both smaller than the interval between the first center portion and the second center portion, the weight input from the outside can be supported more firmly.

[0028] According to embodiments of this disclosure, by making the interval between the first inner connecting portion and the second inner connecting portion different from the interval between the first outer connecting portion and the second outer connecting portion, the assembly direction of the lower arm assembly for the wheel and the vehicle body can be easily determined.

[0029] According to embodiments of this disclosure, since the plate, the first leg, and the third leg are manufactured by extruding aluminum material, weight and cost can be reduced and production output can be increased compared to existing methods using hot-forged aluminum material.

[0030] According to embodiments of this disclosure, the horizontal and vertical movement of the spring pad can be effectively restricted by the second pad body inserted into the insertion hole and the fixing member inserted into the fixing hole.

[0031] According to embodiments of this disclosure, since the number of the first fixing holes and the number of the second fixing holes are different based on the second axis, misalignment of the arrangement direction of the spring pads can be prevented.

[0032] According to embodiments of this disclosure, the bottom cover disposed on the underside of the plate can be stably supported by fastening members.

[0033] According to embodiments of this disclosure, since the plate and the bottom cover are assembled by sliding via an insertion flange, the assembly speed and efficiency can be improved.

[0034] According to embodiments of this disclosure, since the number of insert flanges is greater than the number of fixed flanges, the number of flange fixing members requiring a separate fastening process is relatively reduced, thus improving assembly convenience. Attached Figure Description

[0035] Figure 1 This is a schematic view showing the lower arm assembly in a state where it has been installed according to an embodiment of the present disclosure.

[0036] Figure 2 This is a perspective view schematically showing the construction of the lower arm assembly according to an embodiment of the present disclosure.

[0037] Figure 3 This is an exploded perspective view schematically showing the construction of the lower arm assembly according to an embodiment of the present disclosure.

[0038] Figure 4 This is a perspective view schematically showing the structure of the plate, the first leg, and the second leg according to this embodiment.

[0039] Figure 5 This is a schematic side view showing the structure of the plate, the first leg, and the second leg according to this embodiment.

[0040] Figure 6 This is a schematic plan view showing the structure of the plate, the first leg, and the second leg according to this embodiment.

[0041] Figure 7 This is a schematic bottom view showing the structure of the plate, the first leg, and the second leg according to this embodiment.

[0042] Figure 8 This is an enlarged view schematically showing the construction of the outer groove according to an embodiment of the present disclosure.

[0043] Figure 9 This is an enlarged view schematically showing the construction of the groove according to an embodiment of the present disclosure.

[0044] Figure 10 This is a schematic cross-sectional perspective view showing the spring pad in a state where it has been installed according to an embodiment of the present disclosure.

[0045] Figure 11 This is a schematic bottom perspective view showing the spring pad installed according to an embodiment of the present disclosure.

[0046] Figure 12This is a perspective view schematically showing the construction of a spring pad according to an embodiment of the present disclosure.

[0047] Figure 13 This is a schematic bottom perspective view showing the construction of a spring pad according to an embodiment of the present disclosure.

[0048] Figure 14 This is a perspective view schematically showing the structure of a guide member according to an embodiment of the present disclosure.

[0049] Figure 15 This is a schematic front view showing the construction of a guide member according to an embodiment of the present disclosure.

[0050] Figure 16 This is a perspective view schematically showing the construction of a lower arm assembly according to another embodiment of the present disclosure.

[0051] Figure 17 This is an exploded perspective view schematically showing the construction of a lower arm assembly according to another embodiment of the present disclosure.

[0052] Figure 18 This is a schematic plan view illustrating the construction of a lower arm assembly according to another embodiment of the present disclosure.

[0053] Figure 19 This is a schematic cross-sectional view showing the construction of a grooved member according to another embodiment of the present disclosure.

[0054] Figure 20 and Figure 21 This is a schematic view illustrating the assembly process of a bottom cover according to another embodiment of the present disclosure. Detailed Implementation

[0055] In the following description, an embodiment of the lower arm assembly according to the present disclosure will be described with reference to the accompanying drawings.

[0056] In this process, for clarity and convenience of description, the thickness of lines or the dimensions of components shown in the accompanying drawings may be enlarged. The terms described below have been defined by consideration of their function in this disclosure and may be changed according to the intent or practice of the user or operator. Therefore, these terms should be defined based on the entire contents of this specification.

[0057] Furthermore, throughout the specification, when a component is described as being "connected (or linked)" to another component, the component may be "directly connected (or linked)" to the other component, or it may be "indirectly connected (or linked)" to the other component using another component located between the two components. When it is mentioned that a component "includes (or has)" another component, this means that the component may also "include (or have)" other components, unless explicitly stated otherwise; other components are not excluded.

[0058] Furthermore, throughout this specification, the same reference numerals may denote the same components. Although not mentioned or described in a particular drawing, the same or similar reference numerals may be described based on another drawing. Similarly, although a portion of a particular drawing may not be labeled with reference numerals, that portion may be described based on another drawing. Moreover, for ease of understanding, the number, shape, and size of detailed components included in the drawings of this application, as well as the relative differences between dimensions, have been defined, and the embodiments are not limited, and implementation can proceed in various forms.

[0059] Figure 1 This is a schematic view showing the lower arm assembly in a state where it has been installed according to an embodiment of the present disclosure. Figure 2 This is a perspective view schematically showing the construction of the lower arm assembly according to an embodiment of the present disclosure. Figure 3 This is an exploded perspective view schematically showing the construction of the lower arm assembly according to an embodiment of the present disclosure.

[0060] The wheel 2 described below can be exemplified as the rear wheel of a vehicle. The body 3 can be exemplified as various structures forming the structural frame of the vehicle (such as the vehicle's subframe). Furthermore, the width direction of the vehicle can be represented based on... Figure 1 and Figure 2 The direction parallel to the X-axis in the diagram. The length direction of the vehicle can be exemplified as being parallel to the direction based on... Figure 2 The direction parallel to the Y-axis.

[0061] refer to Figures 1 to 3 According to this embodiment, the lower arm assembly 1 includes a plate 100, a first leg 200, and a second leg 300.

[0062] Plate 100, first leg 200, and second leg 300 can all be made of aluminum. Plate 100, first leg 200, and second leg 300 can all be manufactured by extrusion. Therefore, compared with the case where the lower arm assembly is formed by hot forging aluminum, the lower arm assembly 1 according to this embodiment can reduce weight, lower cost, and increase productivity.

[0063] The plate 100 can extend along a first axis C1 and generally support the first leg 200 and the second leg 300. The plate 100 can be disposed between the wheel 2 and the vehicle body 3. The bottom surface of the plate 100 can be disposed facing the ground. The top surface of the plate 100 can be disposed in the direction in which the plate becomes farther away from the ground. In this embodiment, the first axis C1 can represent the width direction of the vehicle, that is, based on... Figure 1 and Figure 2 Any straight line parallel to the X-axis in the diagram.

[0064] Figure 4 This is a perspective view schematically showing the structure of the plate, the first leg, and the second leg according to this embodiment. Figure 5 This is a schematic side view showing the structure of the plate, the first leg, and the second leg according to this embodiment. Figure 6 This is a schematic plan view showing the structure of the plate, the first leg, and the second leg according to this embodiment. Figure 7 This is a schematic bottom view showing the structure of the plate, the first leg, and the second leg according to this embodiment.

[0065] refer to Figures 1 to 7 According to this embodiment, the plate 100 includes a first plate 110, a second plate 120 and a third plate 130.

[0066] The first plate 110 forms the appearance of the center of the plate 100 and can support the second plate 120 and the third plate 130.

[0067] According to this embodiment, the first plate 110 can be in the form of a flat plate arranged parallel to the first axis C1. The bottom and top surfaces of the first plate 110 can be arranged parallel to the ground.

[0068] The second plate 120 can extend from one end of the first plate 110.

[0069] According to this embodiment, the second plate 120 can be in the form of a flat plate extending toward the wheel 2 from the end of the first plate 110 that is positioned facing the wheel 2. The second plate 120 can be inclined upward relative to the first axis C1. For example, the second plate 120 can be configured such that the distance from the ground increases as it approaches the end of the second plate. The inclination angle of the second plate 120 relative to the first axis C1 can be designed and varied depending on the position of the wheel 2.

[0070] The third plate 130 can extend from the other end of the first plate 110.

[0071] According to this embodiment, the third plate 130 can be in the form of a flat plate extending toward the vehicle body 3 from the other end of the first plate 110 that is positioned facing the vehicle body 3. The third plate 130 can be inclined upward relative to the first axis C1. For example, the third plate 130 can be configured such that the distance from the ground increases as it approaches the end of the third plate. The inclination angle of the third plate 130 relative to the first axis C1 can be designed and varied according to the position of the wheel 2. Therefore, according to this embodiment, the plate 100 can be in the form of a plate with a relatively low center position and curved upward toward both ends of the plate.

[0072] The extension length of the third plate 130 can be greater than the extension length of the second plate 120. Therefore, the gap between the first plate 110 and the wheel 2 can be smaller than the gap between the first plate 110 and the vehicle body 3.

[0073] The first leg 200 and the second leg 300 can be connected to the bottom surface of the plate 100. The first leg 200 and the second leg 300 can be arranged symmetrically based on a first axis C1. For example, the first leg 200 and the second leg 300 can be arranged to be spaced apart from each other at a predetermined interval along a second axis C2, the second axis C2 being perpendicular to the first axis C1, and the first axis C1 being located between the first leg and the second leg. The second axis C2 can refer to... Figure 2 The line is parallel to the Y-axis and intersects the first axis C1 perpendicularly at intersection point A. Intersection point A can be exemplified as any point located within the first plate 110.

[0074] Each of the first leg 200 and the second leg 300 can be coupled to the wheel 2 and the body 3 at both ends, respectively. Therefore, the first leg 200 and the second leg 300 can provide a mechanical connection between the lower arm assembly 1 and the wheel 2 and the body 3.

[0075] According to this embodiment, the first leg 200 includes a first central portion 210, a first outer connecting portion 220, and a first inner connecting portion 230.

[0076] The first central portion 210 is connected to the first plate 110 and can form the appearance of the central portion of the first leg 200.

[0077] According to this embodiment, the first central portion 210 can protrude downward from the bottom surface of the first plate 110. The length of the first central portion 210 can be greater than the length of the first plate 110. Therefore, the central region of the first central portion 210 can be provided on the lower side of the first plate 110. The regions at both ends of the first central portion 210 can be provided on the lower sides of the second plate 120 and the third plate 130, respectively. The central region of the first central portion 210 can be provided parallel to the first plate 110. That is, the central region of the first central portion 210 can be provided parallel to the first axis C1. The regions at both ends of the first central portion 210 can be provided parallel to the second plate 120 and the third plate 130, respectively. That is, the regions at both ends of the first central portion 210 can each be provided inclined upward at a predetermined angle relative to the first axis C1.

[0078] The first external connecting part 220 is connected to the second plate 120 and can form the appearance of one end of the first leg 200.

[0079] According to this embodiment, the first external connecting portion 220 can protrude downward from the bottom surface of the second plate 120. The length direction of the first external connecting portion 220 can be set to be parallel to the second plate 120. That is, the length direction of the first external connecting portion 220 can be inclined upward at a predetermined angle relative to the first axis C1. The first external connecting portion 220 can be set to be spaced apart from one end of the first central portion 210 by a predetermined interval L1.

[0080] The first outer connecting part 220 can be combined with the steering knuckle 2a connected to the wheel 2. Therefore, the first outer connecting part 220 can provide a mechanical connection between the lower arm assembly 1 and the wheel 2. The first outer connecting part 220 can be combined with the steering knuckle 2a by various types of connection methods (such as bolt connection, mating and pin connection).

[0081] The first inner connecting part 230 is connected to the third plate 130 and can form the appearance of the other end of the first leg 200.

[0082] According to this embodiment, the first inner connecting portion 230 can protrude downward from the bottom surface of the third plate 130. The length direction of the first inner connecting portion 230 can be set parallel to the third plate 130. That is, the length direction of the first inner connecting portion 230 can be inclined upward at a predetermined angle relative to the first axis C1. The first inner connecting portion 230 can be set to be spaced apart from the other end of the first central portion 210 by a predetermined interval L2.

[0083] The first inner connecting part 230 can be combined with the body 3. Therefore, the first inner connecting part 230 can provide a mechanical connection between the lower arm assembly 1 and the body 3. The first inner connecting part 230 can be combined with the body 3 by various types of combination methods (such as bolt connection, mating and pin connection).

[0084] The interval L1 between the first outer connecting portion 220 and the first central portion 210 can be smaller than the interval L2 between the first inner connecting portion 230 and the first central portion 210.

[0085] According to this embodiment, the first leg 200 may further include a first outer extension 240 and a first inner extension 250.

[0086] The first outer extension 240 can connect one end of the first central part 210 and the first outer connecting part 220.

[0087] According to this embodiment, the first outer extension 240 can be disposed between the first central portion 210 and the first outer connecting portion 220. The first outer extension 240 can protrude downward from the bottom surface of the second plate 120. The two ends of the first outer extension 240 can be connected to the first central portion 210 and the first outer connecting portion 220, respectively.

[0088] The first inner extension 250 can connect the first central part 210 and the first inner connecting part 230.

[0089] According to this embodiment, the first inner extension 250 can be disposed between the other end of the first central portion 210 and the first inner connecting portion 230. The first inner extension 250 can protrude downward from the bottom surface of the third plate 130. Both ends of the first inner extension 250 can be connected to the first central portion 210 and the first inner connecting portion 230.

[0090] The second leg 300 according to this embodiment includes a second central portion 310, a second outer connecting portion 320, and a second inner connecting portion 330.

[0091] The second center portion 310 is connected to the first plate 110 and can form the appearance of the center portion of the second leg 300.

[0092] According to this embodiment, the second central portion 310 can protrude downward from the bottom surface of the first plate 110. The length of the second central portion 310 can be greater than the length of the first plate 110. Therefore, the central region of the second central portion 310 can be provided on the lower side of the first plate 110. The regions at both ends of the second central portion 310 can be provided on the lower sides of the second plate 120 and the third plate 130, respectively. The central region of the second central portion 310 can be provided parallel to the first plate 110. That is, the central region of the second central portion 310 can be provided parallel to the first axis C1. The regions at both ends of the second central portion 310 can be provided parallel to the second plate 120 and the third plate 130, respectively. That is, the regions at both ends of the second central portion 310 can be provided inclined upward at a predetermined angle relative to the first axis C1.

[0093] The second central portion 310 may be configured to be symmetrical to the first central portion 210 based on the first axis C1. The second central portion 310 may be configured to be parallel to the first central portion 210. The second central portion 310 may be spaced apart from the first central portion 210 along the second axis C2 at a predetermined interval W1.

[0094] The second external connecting part 320 is connected to the second plate 120 and can form the appearance of one end of the second leg 300.

[0095] According to this embodiment, the second external connecting portion 320 can protrude downward from the bottom surface of the second plate 120. The length direction of the second external connecting portion 320 can be set parallel to the second plate 120. That is, the length direction of the second external connecting portion 320 can be inclined upward at a predetermined angle relative to the first axis C1. The second external connecting portion 320 can be set to be separated from one end of the second center portion 310 by a predetermined interval. The interval between the second center portion 310 and the second external connecting portion 320 can be the same as the interval L1 between the first center portion 210 and the first external connecting portion 220.

[0096] The second outer connecting part 320 can be combined with the steering knuckle 2a connected to the wheel 2. Therefore, the second outer connecting part 320 can provide a mechanical connection between the lower arm assembly 1 and the wheel 2. The second outer connecting part 320 can be combined with the steering knuckle 2a by various types of connection methods (such as bolt connection, assembly and pin connection).

[0097] The second outer connecting portion 320 can be configured to be symmetrical to the first outer connecting portion 220 based on the first axis C1. The second outer connecting portion 320 can be arranged parallel to the first outer connecting portion 220. The second outer connecting portion 320 can be spaced apart from the first outer connecting portion 220 along the second axis C2 at a predetermined interval W2.

[0098] The gap W2 between the first outer connecting portion 220 and the second outer connecting portion 320 can be smaller than the gap W1 between the first center portion 210 and the second center portion 310. Therefore, the first outer connecting portion 220 and the second outer connecting portion 320 can more firmly support the weight transmitted from the wheel 2.

[0099] The second inner connecting part 330 is connected to the third plate 130 and can form the appearance of the other end of the first leg 200.

[0100] According to this embodiment, the second inner connecting portion 330 can protrude downward from the bottom surface of the third plate 130. The length direction of the second inner connecting portion 330 can be set parallel to the third plate 130. That is, the length direction of the second inner connecting portion 330 can be inclined upward at a predetermined angle relative to the first axis C1. The second inner connecting portion 330 can be set to be spaced apart from the other end of the second center portion 310 at a predetermined interval. The interval between the second center portion 310 and the second inner connecting portion 330 can be the same as the interval L2 between the first center portion 210 and the first inner connecting portion 230.

[0101] The second inner connecting part 330 can be coupled to the body 3. Therefore, the second inner connecting part 330 can provide a mechanical connection between the lower arm assembly 1 and the body 3. The second inner connecting part 330 can be coupled to the body 3 by various types of coupling methods (such as bolt connection, assembly and pin connection).

[0102] The second inner connecting portion 330 can be configured to be symmetrical to the first inner connecting portion 230 based on the first axis C1. The second inner connecting portion 330 can be arranged parallel to the first inner connecting portion 230. The second inner connecting portion 330 can be spaced apart from the first inner connecting portion 230 along the second axis C2 at a predetermined interval W3.

[0103] The gap W3 between the first inner connecting portion 230 and the second inner connecting portion 330 can be smaller than the gap W1 between the first center portion 210 and the second center portion 310. Therefore, the first inner connecting portion 230 and the second inner connecting portion 330 can more firmly support the weight transmitted from the vehicle body.

[0104] The interval W3 between the first inner connecting portion 230 and the second inner connecting portion 330 may be different from the interval W2 between the first outer connecting portion 220 and the second outer connecting portion 320. For example, the interval W2 between the first outer connecting portion 220 and the second outer connecting portion 320 may be smaller than the interval W3 between the first inner connecting portion 230 and the second inner connecting portion 330. Therefore, the user can easily identify the assembly direction of the lower arm assembly 1 with respect to the wheel 2 and the body 3 based on the difference between the interval W3 between the first inner connecting portion 230 and the second inner connecting portion 330 and the interval W2 between the first outer connecting portion 220 and the second outer connecting portion 320.

[0105] The second leg 300 according to this embodiment may further include a second outer extension 340 and a second inner extension 350.

[0106] The second outer extension 340 can connect one end of the second central part 310 and the second outer connecting part 320.

[0107] According to this embodiment, the second outer extension 340 can be disposed between the second central portion 310 and the second outer connecting portion 320. Both ends of the second outer extension 340 can be connected to the second central portion 310 and the second outer connecting portion 320, respectively. The second outer extension 340 can protrude downward from the bottom surface of the second plate 120. The second outer extension 340 can be configured to be symmetrical with the first outer extension 240 based on the first axis C1.

[0108] Since the gap W2 between the first outer connecting portion 220 and the second outer connecting portion 320 is smaller than the gap W1 between the first center portion 210 and the second center portion 310, the gap between the first outer extension portion 240 and the second outer extension portion 340 can decrease as they approach the first outer connecting portion 220 and the second outer connecting portion 320. That is, the first outer extension portion 240 and the second outer extension portion 340 can extend obliquely from the first center portion 210 and the second center portion 310 toward the first axis C1, respectively, in the direction in which the first outer extension portion 240 and the second outer extension portion 340 become closer to each other.

[0109] The second inner extension 350 can be connected to the second central part 310 and the second inner connecting part 330.

[0110] According to this embodiment, the second inner extension 350 can be disposed between the other end of the second central portion 310 and the second inner connecting portion 330. Both ends of the second inner extension 350 can be connected to the second central portion 310 and the second inner connecting portion 330. The second inner extension 350 can protrude downward from the bottom surface of the third plate 130. The second inner extension 350 can be configured to be symmetrical with the first inner extension 250 based on the first axis C1.

[0111] Since the gap W3 between the first inner connecting portion 230 and the second inner connecting portion 330 is smaller than the gap W1 between the first center portion 210 and the second center portion 310, the gap between the first inner extension portion 250 and the second inner extension portion 350 can decrease as they approach the first inner connecting portion 230 and the second inner connecting portion 330. That is, the first inner connecting portion 230 and the second inner connecting portion 330 can extend obliquely from the first center portion 210 and the second center portion 310 toward the first axis C1, respectively, in the direction in which the first inner connecting portion 230 and the second inner connecting portion 330 become closer to each other.

[0112] Since the interval W2 between the first outer connecting portion 220 and the second outer connecting portion 320 is smaller than the interval W3 between the first inner connecting portion 230 and the second inner connecting portion 330, the angle between the first outer connecting portion 220 and the first axis C1 can be greater than the angle between the first inner connecting portion 230 and the first axis C1. Similarly, the angle between the second outer connecting portion 320 and the first axis C1 can be greater than the angle between the second inner connecting portion 330 and the first axis C1.

[0113] The lower arm assembly 1 according to this embodiment may include an outer groove 410 and an inner groove 420.

[0114] The outer groove 410 penetrates the second plate 120 and can be positioned between the first support leg 200 and the second support leg 300. By removing some area of ​​the second plate 120 during the process of connecting the first support leg 200 and the second support leg 300 to the wheel 2, the outer groove 410 can serve as a component to prevent the second plate 120 from interfering with a part around the wheel 2 (such as the steering knuckle 2a).

[0115] Figure 8 This is an enlarged view schematically showing the construction of the outer groove according to an embodiment of the present disclosure.

[0116] refer to Figure 8 According to this embodiment, the outer groove 410 may include a first outer groove 411 and a second outer groove 412.

[0117] The first outer groove 411 can be disposed between the first outer connecting part 220 and the second outer connecting part 320.

[0118] According to this embodiment, the first outer groove 411 may have a hole that penetrates the top and bottom surfaces of the second plate 120 disposed between the first outer connecting portion 220 and the second outer connecting portion 320. The width of the first outer groove 411 may be the same as or smaller than the interval W2 between the first outer connecting portion 220 and the second outer connecting portion 320.

[0119] The second outer groove 412 can be disposed between the first outer extension 240 and the second outer extension 340.

[0120] According to this embodiment, the second outer groove 412 may have a hole that penetrates the top and bottom surfaces of the second plate 120 disposed between the first outer extension 240 and the second outer extension 340. The second outer groove 412 may be connected to the first outer groove 411. The width of the second outer groove 412 may increase as it approaches the first outer groove 411.

[0121] The recess 420 penetrates the third plate 130 and can be positioned between the first leg 200 and the second leg 300. During the process of connecting the first leg 200 and the second leg 300 to the vehicle body 3, by removing some areas of the third plate 130, the recess 420 can serve as a component to prevent interference between the third plate 130 and a portion of the area surrounding the vehicle body 3.

[0122] Figure 9 This is an enlarged view schematically showing the construction of the groove according to an embodiment of the present disclosure.

[0123] refer to Figure 9 The inner groove 420 according to this embodiment may include a first inner groove 421, a second inner groove 422 and a third inner groove 423.

[0124] The first inner groove 421 can be disposed between the first inner connecting part 230 and the second inner connecting part 330.

[0125] According to this embodiment, the first inner groove 421 may have a hole that penetrates the top and bottom surfaces of the third plate 130 disposed between the first inner connecting portion 230 and the second inner connecting portion 330. The width of the first inner groove 421 may be the same as or smaller than the interval W3 between the first inner connecting portion 230 and the second inner connecting portion 330.

[0126] The second inner groove 422 can be disposed between the first inner extension 250 and the second inner extension 350.

[0127] According to this embodiment, the second inner groove 422 may have a hole penetrating the upper and lower surfaces of the third plate 130 disposed between the first inner extension 250 and the second inner extension 350. The second inner groove 422 may be connected to the first inner groove 421. The width of the second inner groove 422 may be greater than the width of the first inner groove 421. Therefore, the second inner groove 422 can more effectively prevent interference between the portion extending from the vehicle body 3 between the first support leg 200 and the second support leg 300 and the third plate 130.

[0128] The third inner groove 423 can be disposed between the first central portion 210 and the second central portion 310.

[0129] According to this embodiment, the third inner groove 423 may have a hole penetrating the top and bottom surfaces of the third plate 130, which is located between the end of the second center portion 310 and the first center portion 210. The third inner groove 423 may be connected to the second inner groove 422. That is, the first inner groove 421, the second inner groove 422, and the third inner groove 423 may be sequentially connected in the length direction of the third plate 130. The width of the third inner groove 423 may increase as it approaches the second inner groove 422.

[0130] The lower arm assembly 1 according to this embodiment may also include a spring pad 500.

[0131] Spring pad 500 can be attached to the upper surface of plate 100. Spring pad 500 can be used as a component to support spring 4 on plate 100. For example, spring pad 500 can be attached to the top surface of first plate 110. Therefore, by maintaining spring pad 500 parallel to the first axis C1, spring pad 500 can support spring 4 more stably.

[0132] Figure 10 This is a schematic cross-sectional perspective view showing the spring pad in a state where it has been installed according to an embodiment of the present disclosure. Figure 11 This is a schematic bottom perspective view showing the spring pad installed according to an embodiment of the present disclosure. Figure 12 This is a perspective view schematically showing the construction of a spring pad according to an embodiment of the present disclosure. Figure 13 This is a schematic bottom perspective view showing the construction of a spring pad according to an embodiment of the present disclosure.

[0133] refer to Figures 10 to 13 According to this embodiment, the spring pad 500 may include a first pad body 510 and a second pad body 520.

[0134] The first pad body 510 can be disposed on the first plate 110. The bottom surface of the first pad body 510 can sit on the top surface of the first plate 110. The bottom of the spring 4 can sit on the top surface of the first pad body 510. The detailed shape of the first pad body 510 is not limited to... Figures 10 to 13 The shape shown can be designed and modified in various ways so that the first pad body can support the spring 4.

[0135] The second pad body 520 extends from the first pad body 510 and can restrict the movement of the first pad body 510 relative to the plate 100.

[0136] According to this embodiment, the plate 100 may also include an insertion hole 140 that penetrates the first plate 110 for connection with the second pad body 520.

[0137] The insertion hole 140 according to this embodiment can be in the form of a hole that perpendicularly penetrates the top and bottom surfaces of the first plate 110. The insertion hole 140 can have a circular cross-section. The central axis C of the insertion hole 140 can be set to intersect perpendicularly with the first axis C1 and the second axis C2 at the intersection point A. The area of ​​the insertion hole 140 can be formed to be smaller than the area of ​​the first pad body 510.

[0138] According to this embodiment, the second pad body 520 extends downward from the bottom surface of the first pad body 510 and can be inserted into the insertion hole 140. The second pad body 520 may have an approximately cylindrical shape. The central axis of the second pad body 520 may be located on the same axis as the central axis of the insertion hole 140. The outer circumferential surface of the second pad body 520 may contact the inner circumferential surface of the first plate 110, which is configured to surround the insertion hole 140. Therefore, the second pad body 520 can prevent the first pad body 510 from moving in a direction perpendicular to the central axis C of the insertion hole 140 on the first plate 110.

[0139] The second pad body 520, which protrudes to the lower side of the first plate 110, can be disposed between the first support leg 200 and the second support leg 300, or more specifically, between the first center portion 210 and the second center portion 310.

[0140] The spring pad 500 according to this embodiment may also include a fixing member 530.

[0141] The fixing member 530 extends from the first pad body 510 and can be used to restrict the movement of the first pad body 510 together with the second pad body 520. For example, the second pad body 520 can restrict the movement of the first pad body 510 in a direction perpendicular to the central axis C of the insertion hole 140. The fixing member 530 can restrict the movement of the first pad body 510 in a direction parallel to the central axis C of the insertion hole 140.

[0142] The plate 100 according to this embodiment may also include a fixing hole 150 for connecting with the fixing member 530.

[0143] The fixing hole 150 penetrates the first plate 110 and can be set to be spaced apart from the insertion hole 140.

[0144] The fixing hole 150 according to this embodiment may include a first fixing hole 151 and a second fixing hole 152.

[0145] Both the first fixing hole 151 and the second fixing hole 152 can be in the form of holes that perpendicularly penetrate the top and bottom surfaces of the first plate 110. The cross-section of each of the first fixing hole 151 and the second fixing hole 152 can be smaller than the cross-section of the insertion hole 140. The first fixing hole 151 and the second fixing hole 152 can be the same as or different from each other.

[0146] The first fixing hole 151 and the second fixing hole 152 can be arranged along the periphery of the insertion hole 140. More specifically, the first fixing hole 151 and the second fixing hole 152 can be arranged to be spaced apart from each other in a cylindrical direction centered on the intersection point A. The distance from the intersection point A to the central axis of the first fixing hole 151 can be the same as the distance from the intersection point A to the central axis of the second fixing hole 152.

[0147] The first fixing hole 151 and the second fixing hole 152 can be respectively provided on both sides of the second axis C2. That is, the first fixing hole 151 can be arranged on one side of the first plate 110 divided based on the second axis C2. The second fixing hole 152 can be arranged on the other side of the first plate 110 divided based on the second axis C2.

[0148] According to this embodiment, the first fixing hole 151 can be disposed between the insertion hole 140 and the inner groove 420. The first fixing hole 151 can be disposed on the first axis C1. That is, the central axis of the first fixing hole 151 can be disposed so that it intersects the first axis C1 at a point.

[0149] According to this embodiment, the second fixing hole 152 can be provided between the insertion hole 140 and the outer groove 410.

[0150] Multiple second fixing holes 152 can be formed. The multiple second fixing holes 152 can be symmetrically arranged based on the first axis C1. That is, the multiple second fixing holes 152 can be arranged to be spaced apart from each other along the second axis C2 at a predetermined interval, wherein the first axis C1 is located between the multiple second fixing holes.

[0151] For example, the second fixing holes 152 can be formed as a pair. The angle between the pair of second fixing holes 152 formed with the intersection point A as the center can be smaller than the angle between the second fixing hole 152 formed with the intersection point A as the center and the first fixing hole 151. Therefore, the first fixing hole 151 and the second fixing hole 152 can be arranged on both sides of the second axis C2 based on the second axis C2.

[0152] The fixing member 530 according to this embodiment may include a first fixing member 531 and a second fixing member 532.

[0153] The first fixing member 531 extends from the first pad body 510 and can be inserted into the first fixing hole 151.

[0154] The first fixing member 531 according to this embodiment may include a first fixing body 531a and a first hook 531b.

[0155] The first fixing body 531a may be in the form of a column extending downward from the bottom surface of the first pad body 510. The cross-section of the first fixing body 531a may be smaller than or the same as the cross-section of the first fixing hole 151. When the first pad body 510 is placed on the top surface of the first plate 110, the first fixing body 531a may be inserted into the first fixing hole 151.

[0156] The first hook 531b can prevent the first fixing body 531a from disengaging from the first fixing hole 151.

[0157] According to this embodiment, the first hook 531b can be disposed at the end of the first fixing body 531a. The cross-section of the first hook 531b can be larger than the cross-section of the first fixing hole 151. When the first fixing body 531a is inserted into the first fixing hole 151, the first hook 531b can contact the bottom surface of the first plate 110.

[0158] The cross-section of the first hook 531b can be formed to decrease as it approaches its end. The cross-section of the end of the first hook 531b can be smaller than the cross-section of the first fixing hole 151. The first hook 531b can be configured to be elastically deformable. Therefore, when the first fixing body 531a is inserted into the first fixing hole 151, the first hook 531b can be easily inserted into the first fixing hole 151 through elastic deformation, can return to its initial form after protruding to the underside of the first plate 110, and can prevent the first fixing body 531a from disengaging.

[0159] The second fixing member 532 extends from the first pad body 510 and can be inserted into the second fixing hole 152. The number of the second fixing members 532 can correspond to the number of the second fixing holes 152. For example, when the second fixing holes 152 are formed as a pair, the second fixing members 532 can also be formed as a pair. The number of the first fixing holes 151 and the number of the second fixing holes 152 can be different from each other based on the second axis C2. Since the number of the first fixing members 531 inserted into the first fixing holes 151 and the number of the second fixing members 532 inserted into the second fixing holes 152 are also different from each other, the lower arm assembly 1 according to this embodiment can prevent misalignment of the setting direction of the spring pad 500, for example, preventing the second fixing members 532 from being inserted into the first fixing holes 151.

[0160] The second fixing member 532 according to this embodiment may include a second fixing body 532a and a second hook 532b.

[0161] The second fixing body 532a may be in the form of a column extending downward from the bottom surface of the first pad body 510. The second fixing body 532a may be spaced apart from the first fixing body 531a at a predetermined angle in a cylindrical direction centered on the central axis of the first pad body 510. The cross-section of the second fixing body 532a may be smaller than or the same as the cross-section of the second fixing hole 152. When the first pad body 510 is seated on the top surface of the first plate 110, the second fixing body 532a can be inserted into the second fixing hole 152.

[0162] The second hook 532b can prevent the second fixing body 532a from disengaging from the second fixing hole 152.

[0163] According to this embodiment, the second hook 532b can be arranged at the end of the second fixing body 532a. The cross-section of the second hook 532b can be larger than the cross-section of the second fixing hole 152. When the second fixing body 532a is inserted into the second fixing hole 152, the second hook 532b can contact the bottom surface of the first plate 110.

[0164] The cross-section of the second hook 532b can be formed to decrease as it approaches its end. The cross-section of the end of the second hook 532b can be smaller than the cross-section of the second fixing hole 152. The second hook 532b can be configured to be elastically deformable. Therefore, when the second fixing body 532a is inserted into the second fixing hole 152, the second hook 532b can be easily inserted into the second fixing hole 152, can return to its initial form after protruding to the underside of the first plate 110, and can prevent the second fixing body 532a from disengaging.

[0165] The spring pad 500 according to this embodiment may also include a groove 540.

[0166] The groove 540 may be recessedly formed in at least one of the first pad body 510 and the second pad body 520. The groove 540 can be used as a component to reduce the overall weight of the spring pad 500 by removing some areas of the spring pad 500. Examples of grooves 540 formed in both the first pad body 510 and the second pad body 520 will be described below. However, the groove 540 is not limited thereto, and may also be formed only in the first pad body 510 or only in the second pad body 520.

[0167] According to this embodiment, the slot 540 may include a first slot 541 and a second slot 542.

[0168] The first groove 541 can be recessed into the first pad body 510.

[0169] According to this embodiment, the first groove 541 can be in the form of a groove recessed upward from the bottom surface of the first pad body 510. Multiple first grooves 541 can be provided. Multiple first grooves 541 can be spaced apart from each other within the first pad body 510. The number and arrangement of the first grooves 541 are not limited to... Figure 13 The quantities and arrangements shown are as described, and can be designed and changed in different ways.

[0170] The second groove 542 can be recessed into the second pad body 520.

[0171] According to this embodiment, the second groove 542 can also be a groove recessed upward from the bottom surface of the second pad body 520. Multiple second grooves 542 can be provided. Multiple second grooves 542 can be spaced apart from each other within the second pad body 520. The number and arrangement of the second grooves 542 are not limited to... Figure 13 The quantities and arrangements shown are as described, and can be designed and changed in different ways.

[0172] The spring pad 500 according to this embodiment may also include a guide member 550.

[0173] The guide member 550 can provide guidance for the assembly direction of the spring pad 500 relative to the plate 100.

[0174] Figure 14 This is a perspective view schematically showing the structure of a guide member according to an embodiment of the present disclosure. Figure 15 This is a schematic front view showing the construction of a guide member according to an embodiment of the present disclosure.

[0175] refer to Figure 14 and Figure 15 The plate 100 according to this embodiment may also include a guide groove 160.

[0176] The guide groove 160 can be used as a component to provide a connection between the plate 100 and the guide member 550.

[0177] According to this embodiment, the guide groove 160 may have the form of a groove formed by recessing downward from the top surface of the second plate 120. The guide groove 160 may be disposed between the first external connecting portion 220 and the second external connecting portion 320.

[0178] According to this embodiment, the guide member 550 can protrude outward from the outer peripheral surface of the first pad body 510 along the radial direction of the first pad body 510. When the first pad body 510 is seated on the top surface of the first plate 110, the guide member 550 can be inserted into the guide groove 160. Therefore, during the assembly process of the plate 100 and the spring pad 500, the user can initially align the assembly direction of the spring pad 500 by aligning the guide member 550 with the guide groove 160.

[0179] The lower arm assembly 1 according to this embodiment may further include a bottom cover 600 and a fastening member 700.

[0180] The bottom cover 600 is disposed below the plate 100 and can cover the first outrigger 200 and the second outrigger 300. The bottom cover 600 can be used as a component to protect the plate 100, the first outrigger 200 and the second outrigger 300 from the effects of foreign matter scattered from the road surface, and can improve fuel efficiency by reducing air resistance when the vehicle is in motion.

[0181] The bottom cover 600 according to this embodiment may include a cover body 601 and a first seat 610.

[0182] The cover body 601 forms the schematic appearance of the bottom cover 600 and can support the first seat 610.

[0183] According to this embodiment, the cover body 601 can be disposed between the plate 100 and the ground. The top surface of the cover body 601 can be configured to face the bottom surface of the plate 100 by being spaced apart from the bottom surface of the plate 100 at a predetermined interval. The top surface of the cover body 601 can be configured to surround the first support leg 200 and the second support leg 300. The shape of the cover body 601 is not limited to... Figure 3 The shape shown can be designed and changed into various forms, as long as the cover body 601 can be set to face the bottom surface of the plate 100 and can cover the first leg 200 and the second leg 300.

[0184] The first seat 610 can be used as a component to provide a position for the fastening member 700 to sit in the bottom cover 600.

[0185] According to this embodiment, the first seat portion 610 can protrude from the cover body 601 toward the plate 100. The shape of the first seat portion 610 is not limited to... Figure 3 The shape shown in the figure can be designed and modified in various ways within the range where the first seat 610 can support the fastening member 700.

[0186] Multiple first seats 610 can be provided. Multiple first seats 610 can be spaced apart from each other along the periphery of the cover body 601. For example, four first seats 610 can be formed. Each of the four first seats 610 can be individually provided on each edge side of the cover body 601. However, the number and arrangement of the first seats 610 are not limited to this example and various designs and changes are possible.

[0187] Fastening component 700 can connect plate 100 and bottom cover 600.

[0188] The fastening member 700 according to this embodiment may include a fixing flange 710 and a flange fixing member 720.

[0189] The fixed flange 710 extends from the plate 100 and can contact the first seat 610.

[0190] According to this embodiment, the fixing flange 710 can be in the form of a plate extending from the side of the plate 100 to the outside of the plate 100. The bottom surface of the fixing flange 710 can contact the top surface of the first seat portion 610.

[0191] Multiple fixed flanges 710 can be provided. Multiple fixed flanges 710 can individually contact different top surfaces of the first seat 610.

[0192] The flange fixing member 720 can fix the fixing flange 710 to the first seat portion 610. The flange fixing member 720 can be used as a component to prevent the bottom cover 600 from moving relative to the plate 100 by mechanically fixing the fixing flange 710 and the first seat portion 610.

[0193] The flange fixing member 720 according to this embodiment may include a fixing bolt 721 and a fixing nut 722.

[0194] The fixing bolt 721 can pass through the first seat 610 and the fixing flange 710.

[0195] The fixing bolt 721 in this embodiment can be in the form of a bolt threaded member with threads formed on its outer peripheral surface. The bottom of the fixing bolt 721 passes through the first seat 610 and the fixing flange 710, and can protrude to the lower side of the first seat 610. The bottom of the fixing bolt 721 is formed in the form of a common bolt head, and can contact the top surface of the fixing flange 710. Alternatively, the fixing bolt 721 can be integrally fitted into the fixing flange 710.

[0196] The fixing nut 722 engages with the fixing bolt 721 and prevents the fixing bolt 721 from disengaging from the first seat 610 and the fixing flange 710.

[0197] The fixing nut 722 according to this embodiment can be formed in the form of a common threaded nut or a blind nut, wherein threads are formed on its inner circumferential surface. The fixing nut 722 can be disposed on the lower side of the first seat portion 610. The fixing nut 722 can be threadedly engaged with the end of the fixing bolt 721 that protrudes to the lower side of the first seat portion 610. The fixing nut 722 contacts the bottom surface of the first seat portion 610 and can restrict the movement of the fixing bolt 721 in its axial direction.

[0198] In the following, a lower arm assembly 1' according to another embodiment of the present disclosure will be described.

[0199] The lower arm assembly 1' according to this embodiment may differ from the lower arm assembly 1 according to the embodiment of this disclosure only in the detailed construction of the bottom cover 600 and the fastening member 700.

[0200] Therefore, in describing the lower arm assembly 1' according to this embodiment, only the detailed construction of the bottom cover 600 and fastening member 700, which are different from those of the lower arm assembly 1 according to the embodiment of this disclosure, will be described.

[0201] The description of the lower arm assembly 1 according to the embodiments of this disclosure can be applied to the remaining components of the lower arm assembly 1' according to this embodiment without any changes.

[0202] Figure 16 This is a perspective view schematically showing the construction of a lower arm assembly according to another embodiment of the present disclosure. Figure 17 This is an exploded perspective view schematically showing the construction of a lower arm assembly according to another embodiment of the present disclosure. Figure 18 This is a schematic plan view illustrating the construction of a lower arm assembly according to another embodiment of the present disclosure.

[0203] refer to Figures 16 to 18 According to this embodiment, the bottom cover 600 may also include a second seat 620 and a groove-shaped member 630.

[0204] The second seat 620 is spaced apart from the first seat 610 and can protrude from the cover body 601 to the plate 100. The lower arm assembly 1' according to this embodiment can be configured such that some of the plurality of first seats 610 are replaced by the second seat 620 in the lower arm assembly 1 according to the embodiment of this disclosure.

[0205] Multiple second seats 620 can be provided. Multiple second seats 620 can be provided to be spaced apart along the periphery of the cover body 601.

[0206] The number of second seats 620 can be greater than the number of first seats 610. For example, in this embodiment, the number of second seats 620 can be 3 and the number of first seats 610 can be 1. However, the number of first seats 610 and the number of second seats 620 are not limited to this, and the number of second seats 620 can be designed and changed in different ways within the range where the number of second seats 620 is greater than the number of first seats 610.

[0207] The groove-shaped part 630 can be provided on the second seat 620.

[0208] Figure 19 This is a schematic cross-sectional view showing the construction of a grooved member according to another embodiment of the present disclosure.

[0209] refer to Figures 16 to 19 According to this embodiment, the groove-shaped member 630 protrudes upward from the top surface of the second seat portion 620 and may have a box-like form with an empty interior. An opening 631 may be formed on one surface of the groove-shaped member 630, through which the internal space and the external space of the groove-shaped member 630 communicate with each other. The opening 631 may be provided perpendicular to a first direction. In this embodiment, the first direction may be exemplified as a direction parallel to the first axis C1 and pointing from the first plate 110 to the second plate 120.

[0210] Multiple slotted parts 630 can be provided. Multiple slotted parts 630 can be individually provided on different second seats 620.

[0211] The fastening member 700 according to this embodiment may further include an insertion flange 730.

[0212] An insertion flange 730 extends from the plate 100 and can be inserted into the slot 630. When the plate 100 moves on the bottom cover 600 in a first direction, the insertion flange 730 can be inserted into the slot 630 through the opening 631. Therefore, the lower arm assembly 1' according to this embodiment can improve assembly efficiency because the plate 100 and the bottom cover 600 can be initially assembled by sliding.

[0213] Multiple insertion flanges 730 can be provided. Multiple insertion flanges 730 can be individually inserted into different slotted members 630. The number of insertion flanges 730 can be greater than the number of fixing flanges 710. For example, in this embodiment, the number of insertion flanges 730 can be 3, and the number of fixing flanges 710 can be 1. Therefore, the fastening member 700 according to this embodiment can further improve the ease of assembly by relatively reducing the number of flange fixing members 720 that require separate fastening processes.

[0214] The insertion flange 730 according to this embodiment may include a first flange body 731 and a second flange body 732.

[0215] The first flange body 731 is connected to the side of the plate 100 and can support the second flange body 732.

[0216] According to this embodiment, the first flange body 731 can extend from the side of the plate 100 to the outside of the plate 100.

[0217] The second flange body 732 extends from the first flange body 731 and can be arranged parallel to the first direction.

[0218] According to this embodiment, the second flange body 732 bends from the end of the first flange body 731 that protrudes outside the plate 100 and can extend in a first direction. When the plate 100 moves on the bottom cover 600 in the first direction, the second flange body 732 can be inserted into the slot 630 through the opening 631.

[0219] The grooved member 630 according to this embodiment may also include a stop member 632.

[0220] The stop 632 can limit the insertion distance of the insertion flange 730 relative to the slot 630.

[0221] According to this embodiment, the stop 632 can be exemplified as the rear wall of the groove 630 spaced apart from the opening 631 in a first direction. When the insertion flange 730 is inserted into the groove 630, the stop 632 can be configured to face the end of the insertion flange 730, more specifically, the end of the second flange body 732. When the second flange body 732 moves a predetermined distance or more within the groove 630, the stop 632 can contact the end of the second flange body 732 and restrict the movement of the insertion flange 730. Therefore, according to this embodiment, the stop 632 can ensure the consistency of the assembly of the plate 100 and the bottom cover 600 by constantly maintaining the timing of the insertion of the insertion flange 730.

[0222] Figure 20 and Figure 21 This is a schematic view illustrating the assembly process of a bottom cover according to another embodiment of the present disclosure.

[0223] refer to Figure 20 and Figure 21 First, with the fastening member 700 separated from the bottom cover 600, the end of the second flange body 732 is positioned to face the opening 631 in the first direction.

[0224] Subsequently, as the plate 100 moves in the first direction, the second flange body 732 is inserted into the groove 630 through the opening 631.

[0225] During this process, the second flange bodies 732 of multiple insertion flanges 730 can be simultaneously inserted into these slotted parts 630.

[0226] When the second flange body 732 is inserted into the groove 630, the fixed flange 710 is positioned to face the first seat 610 and can be placed on the first seat 610.

[0227] Subsequently, the flange fixing member 720 is combined with the first seat portion 610 and the fixing flange 710. Therefore, the relative movement between the plate 100 and the bottom cover 600 can be completely restricted.

[0228] Although exemplary embodiments of this disclosure have been disclosed for illustrative purposes, those skilled in the art will recognize that various modifications, additions, and substitutions are possible without departing from the scope and spirit of this disclosure as defined in the appended claims.

Claims

1. A lower arm assembly, characterized by, The lower arm assembly includes: A plate extending along the first axis; The first leg is connected to the bottom surface of the plate; and The second leg is connected to the bottom surface of the plate, and the second leg is arranged symmetrically with respect to the first leg with respect to the first axis.

2. The lower arm assembly of claim 1, wherein, The plate includes: The first plate is set parallel to the first axis; A second plate extends from one end of the first plate and is disposed at an upward inclination relative to the first axis; and The third plate extends from the other end of the first plate and is arranged at an upward inclination relative to the first axis.

3. The lower arm assembly of claim 2, wherein, The first leg includes: The first central part is connected to the first plate; A first external connection portion is connected to the second board; and The first inner connecting part is connected to the third plate. The second leg includes: The second central portion is connected to the first plate and is disposed parallel to the first central portion; A second external connecting portion, connected to the second plate and disposed parallel to the first external connecting portion; and The second inner connection portion is connected to the third plate and is disposed parallel to the first inner connection portion.

4. The lower arm assembly of claim 3, wherein, Each of the intervals between the first outer connecting portion and the second outer connecting portion and between the first inner connecting portion and the second inner connecting portion is smaller than the interval between the first central portion and the second central portion.

5. The lower arm assembly of claim 3, wherein, The interval between the first external connecting part and the second external connecting part is smaller than the interval between the first internal connecting part and the second internal connecting part.

6. The lower arm assembly of claim 3, wherein, The first leg includes: A first outer extension portion is disposed between the first central portion and the first outer connecting portion; and A first inner extension is disposed between the first central portion and the first inner connecting portion, and The second leg includes: A second outer extension portion is disposed between the second central portion and the second outer connecting portion; and The second inner extension is disposed between the second central portion and the second inner connecting portion.

7. The lower arm assembly of claim 6, wherein, The lower arm assembly also includes: An outer groove, configured to penetrate the second plate and disposed between the first leg and the second leg; and An inner groove is configured to penetrate the third plate and is disposed between the first leg and the second leg.

8. The lower arm assembly of claim 2, wherein, The lower arm assembly also includes a spring pad that is connected to the top surface of the first plate.

9. The lower arm assembly according to claim 8, characterized in that: The plate also includes an insertion hole penetrating the first plate, and The spring pad includes: The first pad body is seated on the top surface of the first plate; and The second pad body extends from the first pad body and is inserted into the insertion hole.

10. The lower arm assembly according to claim 9, characterized in that: The plate also includes a fixing hole configured to penetrate the first plate and spaced apart from the insertion hole, and The spring pad also includes a fixing member that extends from the first pad body and is inserted into the fixing hole.

11. The lower arm assembly according to claim 10, characterized in that: The central axis of the insertion hole intersects the first axis perpendicularly at the intersection point. The fixing hole includes: A first fixing hole is disposed on the first axis; and Multiple second fixing holes are spaced apart from the first fixing hole in a cylindrical direction centered on the intersection point.

12. The lower arm assembly of claim 11, wherein, The fixing component includes: A first fixing member extends from the first pad body and is inserted into the first fixing hole; and The second fixing member extends from the first pad body and is inserted into the second fixing hole.

13. The lower arm assembly of claim 12, wherein, The first fixing member includes: The first fixing body extends from the bottom surface of the first pad body; and A first hook is disposed at the end of the first fixing body and configured to contact the bottom surface of the first plate.

14. The lower arm assembly of claim 1, wherein, The lower arm assembly also includes: A bottom cover, disposed below the plate and configured to cover the first and second legs; and Fastening components are configured to connect the plate and the bottom cover.

15. The lower arm assembly of claim 14, wherein, The bottom cover includes: A cover body, configured to face the bottom surface of the plate and spaced apart from the plate; and The first seat is configured to protrude from the cover body toward the plate, and The fastening components include: One or more fixed flanges are configured to extend from the plate and contact the first seat portion; and A flange fixing member is configured to fix the fixing flange to the first seat portion.

16. The lower arm assembly of claim 15, wherein, The bottom cover also includes: A second seat portion is configured to protrude from the cover body toward the plate and be spaced apart from the first seat portion; and A groove-shaped component is provided on the second seat portion, and The fastening member further includes one or more insertion flanges, each insertion flange being configured to extend from the plate and insert into the slot.

17. The lower arm assembly of claim 16, wherein, The fixing flange is configured to face the first seat portion when the insertion flange is inserted into the slotted member.

18. The lower arm assembly of claim 16, wherein, The number of insertion flanges is greater than the number of fixed flanges.

19. The lower arm assembly according to claim 16, characterized in that: The grooved component includes an opening perpendicular to the first direction, and When the plate moves in the first direction, the insertion flange passes through the opening and is inserted into the slot.

20. The lower arm assembly of claim 19, wherein, The grooved member further includes a stop member, which is spaced apart from the opening in the first direction and is configured to face the end of the insertion flange.

Images