Frame structure with independent suspension system for commercial vehicles

Abstract

A frame structure of a commercial vehicle with an independent suspension system may include: a front cross beam installed at a lower front end of a wheel cover along the width direction of the vehicle; a rear cross beam installed at a lower rear end of the wheel cover along the width direction, wherein the wheel cover is arranged between the front cross beam and the rear cross beam in the length direction of the vehicle body; a center reinforcement unit installed on the inner lower side of the wheel cover and arranged between the wheel covers, the center reinforcement unit being configured to connect the front cross beam and the rear cross beam along the length direction of the vehicle body; a side reinforcement unit installed on the inner side of the wheel cover and connected to the center reinforcement unit; and a lower reinforcement unit being configured to be connected to the center reinforcement unit and connected to a first suspension mounting assembly through the rear cross beam.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2020-0086187, filed on Jul. 13, 2020, which is hereby incorporated by reference in its entirety. Technical Field

[0003] The present disclosure relates to a frame structure for a large commercial vehicle. Background Art

[0004] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

[0005] Generally, a large commercial vehicle (particularly a bus vehicle) is one of the means of transport capable of transporting a large number of people. Recently, in consideration of the environment and the increase in passengers, a double-decker electric bus vehicle has been applied.

[0006] This double-decker electric bus vehicle of a large commercial vehicle adopts an independent suspension system, which is advantageous in terms of ride comfort, roll stability and steering stability compared to a non-independent suspension system.

[0007] In the case of this double-decker electric bus vehicle, ensuring the strength and rigidity of the vehicle body should be considered as the top priority. However, we found that when a panel structure was applied to strengthen the frame, the strength and rigidity of the vehicle body deteriorated.

[0008] The above information disclosed in this Background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art. Summary of the invention

[0009] The present disclosure provides a frame structure to which an independent suspension system is applied for a commercial vehicle, which is advantageous in terms of strength and rigidity through reinforcement of a closed cross-section member and allows for distribution of a load of a suspension.

[0010] A frame structure of an independent suspension system applied to a commercial vehicle in a form according to the present disclosure may include: a front outrigger and a rear outrigger, which are installed at the lower front end and the lower rear end of the wheel housing along the vehicle width direction, wherein the wheel housing is interposed between the front outrigger and the rear outrigger; a center reinforcement unit, which is installed on the inner lower side of the wheel housing at the center side between the wheel housings and connects the front outrigger and the rear outrigger along the vehicle body length direction; a side reinforcement unit, which is installed on the inner side of the wheel housing and connected to the center reinforcement unit; and a lower reinforcement unit, which is installed to be connected to the center reinforcement unit and is connected to the first suspension mounting assembly through the rear outrigger.

[0011] The frame structure may further include: a front reinforcement unit installed on the inner front side of the wheel house and connected to the front cross beam and the side reinforcement unit; and a rear reinforcement unit installed on the inner rear side of the wheel house and connected to the rear cross beam and the side reinforcement unit.

[0012] The frame structure may further include an upper reinforcement unit mounted on an inner upper surface of the wheel house and connected to the side reinforcement unit.

[0013] The frame structure may also include a second suspension mounting assembly mounted on the front cross member.

[0014] The frame structure may further include a third suspension mounting assembly mounted on the side reinforcement unit.

[0015] The front and rear cross beams may be formed in the form of a rectangular cross-section box in which channel members having a "U"-shaped cross section are joined together.

[0016] The central reinforcement unit may include: a plurality of first reinforcement members, which are mounted on the side reinforcement units, arranged in the form of a rectangular cross-section box, and arranged along the length direction of the vehicle body, in which the channel members with a "U"-shaped cross-section are joined to each other; and a plurality of second reinforcement members, which are mounted on the side reinforcement units, arranged in the form of a square cross-section pipe, and arranged in the up and down directions between the first reinforcement members.

[0017] The central reinforcement unit may also include: a third reinforcement member, which is installed on the lower surface of the first reinforcement member and is arranged in the form of a square cross-section pipe; a fourth reinforcement member with a "U"-shaped cross-section, which is installed on the lower surface of the first reinforcement member and is open in the downward direction; and a fifth reinforcement member with a "U"-shaped cross-section, which is installed on the lower surface of the first reinforcement member and is open in the upward direction.

[0018] The side reinforcement unit may include: a side lower reinforcement member, which is in the form of a square cross-sectional pipe, connected to the central reinforcement unit, and installed on the lower inner side of the wheel cover along the length direction of the vehicle body; and a side upper reinforcement member, which is arranged in pairs and is in the form of a square cross-sectional pipe, is arranged to be spaced apart from the side lower reinforcement member, and is installed on the side of the wheel cover along the length direction of the vehicle body.

[0019] The side reinforcement unit may also include: a first connecting member, which is in the form of a square cross-section pipe, connecting the side lower reinforcement member and the side upper reinforcement member in the up-down direction between the side lower reinforcement member and the side upper reinforcement member; and a second connecting member, which is in the form of a square cross-section pipe, connecting the side upper reinforcement member and the upper surface of the wheel cover, and is arranged in the up-down direction.

[0020] The lower reinforcement unit may include: a front upper channel plate connected to the central reinforcement unit along the vehicle width direction; a front lower channel plate coupled to a lower surface of the front upper channel plate; a rear upper channel plate separately provided from the front upper channel plate and connected to the central reinforcement unit along the vehicle width direction; and a rear lower channel plate joined to the bottom of the rear upper channel plate.

[0021] The lower reinforcement unit may further include: a center panel connecting the front upper channel panel and the rear upper channel panel between the front upper channel panel and the rear upper channel panel; and a center lower channel member connected to the bottom of the center panel.

[0022] The front reinforcing unit and the rear reinforcing unit may include: a plurality of first duct members formed in a rectangular cross-sectional shape and arranged along the vehicle width direction; and a plurality of second duct members formed in a rectangular cross-sectional shape connected to the first duct members and arranged in an up-and-down direction.

[0023] The upper reinforcement unit may include: at least one third duct member formed in a rectangular cross-sectional shape and mounted in an arched form on the inner upper surface of the wheel cover; and a fourth duct member formed in a square cross-sectional shape and connected to the third duct member in a vehicle width direction.

[0024] The third suspension mounting assembly may be mounted on the side reinforcement unit, wherein the third suspension mounting assembly may include: a pair of first mounting brackets mounted on the side reinforcement member; and a second mounting bracket mounted to the first connecting member between the first mounting brackets through the reinforcement panel.

[0025] A frame structure according to one form of the present disclosure may be constructed in the body of a large commercial vehicle including a double-decker electric bus vehicle.

[0026] A form of the present disclosure is advantageous in terms of strength and rigidity, and can more stably increase the durability of the frame structure of a vehicle body.

[0027] In addition, the effects obtained or predicted by the present disclosure will be disclosed directly or implicitly in the detailed description of the present disclosure. That is, various effects predicted according to the present disclosure will be disclosed in the detailed description described later.

[0028] Further areas of applicability will become apparent from the description provided herein.It should be understood that the description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order that the present disclosure may be better understood, various forms of the present disclosure given by way of example will now be described with reference to the accompanying drawings, in which:

[0030] Figure 1 and Figure 2 is a perspective view showing a frame structure of an independent suspension system applied to a commercial vehicle according to one form of the present disclosure;

[0031] Figure 3 is a plan view showing a frame structure of an independent suspension system applied to a commercial vehicle according to one form of the present disclosure;

[0032] Figure 4 is a schematic side view showing a frame structure of an independent suspension system applied to a commercial vehicle according to one form of the present disclosure;

[0033] Figure 5A and Figure 5B is a cross-sectional view of a front cross member and a rear cross member of a frame structure having an independent suspension system applied to a commercial vehicle according to one form of the present disclosure;

[0034] Figure 6 is a diagram showing a center reinforcement unit of a frame structure of an independent suspension system applied to a commercial vehicle according to one form of the present disclosure;

[0035] Fig. 7A , Figure 7B , Figure 7C , Fig.7D and Fig. 7E is a cross-sectional view of a center reinforcement unit of a frame structure having an independent suspension system applied to a commercial vehicle according to one form of the present disclosure;

[0036] Figure 8 is a diagram showing a side reinforcement unit of a frame structure applied to an independent suspension system of a commercial vehicle according to one form of the present disclosure;

[0037] Fig.9A , Fig. 9B and Fig. 9C is a cross-sectional view of a side reinforcement unit of a frame structure applied to an independent suspension system of a commercial vehicle according to one form of the present disclosure;

[0038] Fig.10 is a diagram showing a lower reinforcement unit of a frame structure of an independent suspension system applied to a commercial vehicle according to one form of the present disclosure;

[0039] Fig.11 It is along Fig.10 A cross-sectional view taken along line X1-X1;

[0040] Fig.12 is a projection diagram of a lower reinforcement unit of a frame structure of an independent suspension system applied to a commercial vehicle according to one form of the present disclosure;

[0041] Fig.13A and Fig. 13B is a diagram showing a front reinforcement unit and a rear reinforcement unit of a frame structure of an independent suspension system applied to a commercial vehicle according to one form of the present disclosure;

[0042] Fig.14 is a diagram showing an upper reinforcement unit of a frame structure applied to an independent suspension system of a commercial vehicle according to one form of the present disclosure; and

[0043] Fig.15 is a diagram showing a third suspension mounting assembly of a frame structure to which an independent suspension system is applied to a commercial vehicle according to one form of the present disclosure.

[0044] The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. DETAILED DESCRIPTION

[0045] The present disclosure will be described more fully hereinafter with reference to the accompanying drawings, in which various forms of the present disclosure are shown. As those skilled in the art will appreciate, the described forms can be modified in various different ways, all without departing from the spirit or scope of the present disclosure.

[0046] In order to clearly describe the present disclosure, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or like components throughout the specification.

[0047] The size and thickness of each component shown in the drawings are arbitrarily shown for convenience of explanation, and thus the present disclosure is not necessarily limited to the contents shown in the drawings.

[0048] In addition, in the following detailed description, the names of configurations are divided into first, second, etc. to distinguish the configurations by the same relationship, and in the following description, the order is not necessarily limited.

[0049] Throughout the specification, when a certain part includes a certain constituent element, it means that other constituent elements may be further included rather than excluding other constituent elements unless otherwise specified.

[0050] In addition, terms such as ... unit, ... means, etc. described in the specification mean a unit of a comprehensive construction that performs at least one function or operation.

[0051] Figure 1 and Figure 2 is a perspective view showing a frame structure of an independent suspension system applied to a commercial vehicle according to one form of the present disclosure, and Figure 3 is a plan view showing a frame structure of an independent suspension system for commercial vehicle application in accordance with one form of the present disclosure.

[0052] refer to Figures 1 to 4 The frame structure 100 of a commercial vehicle according to one form of the present disclosure may be applied to a large commercial vehicle in which each wheel is independently connected to a vehicle body frame through an independent suspension system.

[0053] One form of the present disclosure may be applied to a frame structure 100 connected to a suspension 1 in a body of a large commercial vehicle including an ultra-low floor bus vehicle and a double-decker electric bus vehicle as a large bus vehicle to which an independent suspension system is applied. In addition, the above-mentioned large commercial vehicle may include a general city bus vehicle such as an electric bus vehicle and a hydrogen bus vehicle as a large bus vehicle, a rapid bus vehicle, an articulated bus vehicle, and a double-decker hydrogen bus vehicle.

[0054] Suspension in an independent suspension system (1; Ref. Figure 4 ) includes a lower arm, a tie rod and an upper arm. Since the structure of the suspension 1 is well known in the art, a more detailed description of the structure will be omitted in this specification.

[0055] In describing the frame structure 100 of a commercial vehicle according to one form of the present disclosure, for ease of understanding, the suspension 1 is described as a front suspension 1 , but is not limited thereto, and the same configuration may be applied to a rear suspension.

[0056] A frame structure 100 according to one form of the present disclosure includes a wheel cover 3 provided on both front sides. The wheel cover 3 supporting the wheel includes an inner side, an inner front side and an inner rear side, and an inner top side,

[0057] In industry, the vehicle width direction is referred to as the L direction, the front-rear direction of the vehicle body is referred to as the T direction, and the height direction of the vehicle body is referred to as the H direction. However, in one form of the present disclosure, instead of setting the LTH direction as described above as a reference direction, the constituent elements will be described below by setting the vehicle width direction, the vehicle body length direction, and the up-down direction.

[0058] The frame structure 100 of the commercial vehicle applied independent suspension system according to one form of the present disclosure is advantageous in terms of strength and rigidity through reinforcement of the closed cross-section member, and can distribute the load of the front suspension 1 .

[0059] A frame structure 100 of an independent suspension system applied to a commercial vehicle according to one form of the present disclosure includes front and rear cross members 10 and 20 , a center reinforcement unit 30 , side reinforcement units 40 , a lower reinforcement unit 50 , front and rear reinforcement units 60 and 70 , and an upper reinforcement unit 80 .

[0060] The front cross member 10 and the rear cross member 20 are mounted in the vehicle width direction on the lower front end and the lower rear end of the wheel house 3. The wheel house 3 is interposed between the front cross member and the rear cross member in the longitudinal direction of the vehicle.

[0061] The wheel housing 3 is positioned between the front cross member 10 and the rear cross member 20 , and various members, brackets, etc. as central components are provided between the wheel housings 3 .

[0062] The rear cross member 20 is connected to a first suspension mounting assembly 91 connected to a lower arm of the front suspension 1. And the front cross member 10 is connected to a second suspension mounting assembly 92 connected to a tie rod or the like of the front suspension 1.

[0063] Figure 5A and Figure 5B is a cross-sectional view of a front cross member and a rear cross member of a frame structure having an independent suspension system applied to a commercial vehicle according to one form of the present disclosure.

[0064] like Figure 5A and Figure 5B As shown, the front cross member 10 and the rear cross member 20 are formed in the form of a rectangular cross-section box, in which channel members 11, 12 having a "U" shaped cross section are joined together, and channel members 21, 22 having a "U" shaped cross section are joined together.

[0065] refer to Figures 1 to 4 The center reinforcement unit 30 is a reinforcement member of the above-mentioned center section and is installed on the inner lower side of the wheel housing 3 at the center between each wheel housing 3. In addition, the center reinforcement unit 30 is used to reinforce the lower end including the inner lower side of the wheel housing 3.

[0066] Figure 6 is a diagram showing a center reinforcement unit of a frame structure of an independent suspension system applied to a commercial vehicle according to one form of the present disclosure, and Fig. 7A , Figure 7B , Figure 7C , Fig.7D and Fig. 7E is a cross-sectional view of a center reinforcement unit of a frame structure having an independent suspension system applied to a commercial vehicle according to one form of the present disclosure.

[0067] The central reinforcement unit 30 may connect the front cross beam 10 and the rear cross beam 20 along the vehicle body length direction. The central reinforcement unit 30 may include a first reinforcement member 31 , a second reinforcement member 32 , a third reinforcement member 33 , a fourth reinforcement member 34 and a fifth reinforcement member 35 .

[0068] The first reinforcement member 31 is mounted on a side reinforcement unit 40 (which will be further described later), and a plurality of first reinforcement members may be provided and arranged along the length direction of the vehicle body.

[0069] The first reinforcing member 31 is provided in the form of a rectangular cross-sectional box in which the channel members 36a and 36b of "U"-shaped cross-sectional area are joined to each other, such as Fig. 7A shown.

[0070] The second reinforcing member 32 is installed on the side reinforcing unit 40, a plurality of the second reinforcing members 32 are provided, and the second reinforcing members 32 are provided between the first reinforcing members 31 in the up-down direction. Figure 7B As shown, the second reinforcement member 32 is provided in the form of a square cross-section tube.

[0071] The third reinforcing member 33 is mounted on the bottom of the first reinforcing member 31. Figure 7C As shown, the third reinforcing member 33 is provided in the form of a square cross-section pipe.

[0072] The fourth reinforcing member 34 is mounted on the lower surface of the first reinforcing member 31 and is arranged so as to Fig.7D A "U" shaped cross-section channel is shown that is open upward and downward.

[0073] Also, the fifth reinforcing member 35 is mounted on the lower surface of the first reinforcing member 31 and is arranged such that Fig. 7E A "U" shaped cross-section channel is shown opening upward.

[0074] refer to Figures 1 to 4 The side reinforcing unit 40 is used to reinforce the side of the wheel housing 3. The side reinforcing unit 40 is installed on the inner side of the wheel housing 3 and connected to the center reinforcing unit 30.

[0075] Figure 8 is a diagram showing a side reinforcement unit of a frame structure applied to an independent suspension system of a commercial vehicle according to one form of the present disclosure, and Fig.9A , Fig. 9B and Fig. 9C is a cross-sectional view of a side reinforcement unit of a frame structure to which an independent suspension system is applied to a commercial vehicle according to one form of the present disclosure.

[0076] The side reinforcement unit 40 includes a side lower reinforcement member 41 , a side upper reinforcement member 43 , a first connection member 45 , and a second connection member 47 .

[0077] The side lower reinforcement member 41 is connected to the center reinforcement unit 30 and is installed on the lower side of the inner side of the wheel housing 3 in the vehicle body length direction. The side lower reinforcement member 41 is provided in the form of a square cross-section pipe.

[0078] The side upper reinforcement member 43 may be provided as a pair combined in the up-down direction, separated from the side lower reinforcement member 41 in the upward direction, and installed on the side of the wheel housing 3 along the vehicle body length direction. The side upper reinforcement member 43 is provided in the form of a square cross-section pipe.

[0079] The first connection member 45 may be provided in plurality, disposed between the side lower reinforcement member 41 and the side upper reinforcement member 43, and provided in the form of a square cross-section pipe. The first connection member 45 connects the side lower reinforcement member 41 and the side upper reinforcement member 43 in the up-down direction.

[0080] The second connection member 47 may be provided in plural numbers, arranged in the up-down direction, and connected to the upper side reinforcing member 43 and the upper surface of the wheel housing 3. The second connection member 47 is provided in the form of a square cross-section pipe.

[0081] refer to Figures 1 to 4 The lower reinforcement unit 50 is a portion that is basically connected to the front suspension 1 , and reinforces a lower portion of the center between the wheel housings 3 .

[0082] The lower reinforcement unit 50 is connected to the center reinforcement unit 30 , and is coupled to the first suspension mounting assembly 91 through the rear cross member 20 .

[0083] Fig.10 is a diagram showing a lower reinforcement unit of a frame structure of an independent suspension system applied to a commercial vehicle according to one form of the present disclosure, Fig.11 It is along Fig.10 A cross-sectional view along line X1-X1 of Fig.12 is a projection diagram of a lower reinforcement unit of a frame structure to which an independent suspension system is applied to a commercial vehicle according to one form of the present disclosure.

[0084] The lower reinforcement unit 50 includes a front upper channel plate 51 , a front lower channel plate 52 , a rear upper channel plate 53 , a rear lower channel plate 54 , a center plate 55 , and a center lower channel member 56 .

[0085] The front upper channel panel 51 is connected to the center reinforcement unit 30 in the vehicle width direction.

[0086] The front lower channel plate 52 has a shape corresponding to the front upper channel plate 51 and is coupled to the lower surface of the front upper channel plate 51. The front lower channel plate 52 is connected to the lower edge portion and the center portion of the front upper channel plate 51 and forms a plurality of channels together with the front upper channel plate 51.

[0087] The rear upper channel panel 53 is disposed to be spaced apart from the front upper channel panel 51, and is connected to the center reinforcement unit 30 in the vehicle width direction. The rear upper channel panel 53 may form a single channel having a predetermined width.

[0088] The rear lower channel plate 54 has a shape corresponding to the rear upper channel plate 53 and is coupled to the lower surface of the rear upper channel plate 53. The rear lower channel plate 54 is joined to the lower edge of the rear upper channel plate 53 and forms a channel together with the rear upper channel plate 53.

[0089] The center panel 55 connects the front upper channel panel 51 and the rear upper channel panel 53 between the front upper channel panel 51 and the rear upper channel panel 53. The center panel 55 is joined to the front upper channel panel 51 and the rear upper channel panel 53 by the edges on both sides in the vehicle width direction.

[0090] And, the center lower channel member 56 is connected to the lower surface of the center plate 55. The center lower channel member 56 forms a channel having an open top, and is joined to the lower surface of the center plate 55.

[0091] refer to Figures 1 to 4 The front reinforcement unit 60 and the rear reinforcement unit 70 are used to reinforce the inner front side and the inner rear side of the wheel cover 3.

[0092] Fig.13A and Fig. 13B is a diagram showing a front reinforcement unit and a rear reinforcement unit of a frame structure to which an independent suspension system is applied to a commercial vehicle according to one form of the present disclosure.

[0093] The front reinforcement unit 60 is installed at the inner front side of the wheel housing 3 and connected to the front cross member 10 and the side reinforcement unit 40. The rear reinforcement unit 70 is installed at the inner rear side of the wheel housing 3 and connected to the rear cross member 20 and the side reinforcement unit 40, respectively.

[0094] Such a front reinforcing unit 60 and a rear reinforcing unit 70 include a plurality of first duct members 61, 71 and a plurality of second duct members 62, 72, respectively.

[0095] The first duct members 61, 71 have a square cross section and are arranged along the vehicle width direction. And the second duct members 62, 72 have a rectangular cross-sectional shape, are connected to the first duct members 61, 71, and are arranged in the up-down direction.

[0096] refer to Figures 1 to 4 The upper reinforcement unit 80 reinforces the inner upper surface of the wheel cover 3 , is installed on the inner upper surface and is connected to the side reinforcement unit 40 .

[0097] Fig.14 is a diagram showing an upper reinforcement unit of a frame structure to which an independent suspension system is applied to a commercial vehicle according to one form of the present disclosure.

[0098] The upper reinforcement unit 80 may include a third duct member 81 and a fourth duct member 83 .

[0099] A plurality of third duct members 81 are formed to have a rectangular cross-sectional shape and are mounted in an arch shape on the inner upper surface of the wheel housing 3. And a plurality of fourth duct members 83 are formed to have a rectangular cross-sectional shape and are mounted on the inner upper surface of the wheel housing 3. The fourth duct members 83 connect the third duct members 81 in the vehicle width direction.

[0100] Fig.15 is a diagram showing a third suspension mounting assembly of a frame structure to which an independent suspension system is applied to a commercial vehicle according to one form of the present disclosure.

[0101] In one form of the present disclosure, a third suspension mounting assembly 93 mounted on the side reinforcement unit 40 is further included. The third suspension mounting assembly 93 is used to mount the upper arm of the front suspension 1 and the upper part of the shock absorber. The third suspension mounting assembly 93 includes a first mounting bracket 95 and a second mounting bracket 96.

[0102] The first mounting bracket 95 may be provided as a pair, and may mount the upper arm of the front suspension 1. The first mounting bracket 95 is mounted on the side upper reinforcement member 43 of the side reinforcement unit 40.

[0103] And the upper shock absorber of the front suspension 1 may be mounted to the second mounting bracket 96. The second mounting bracket 96 is mounted to the first connection member 45 of the side reinforcement unit 40 through the reinforcement panel 97.

[0104] Unlike the frame structure of the conventional art which is composed of an integral panel, the frame structure 100 of the commercial vehicle with an independent suspension system constructed as described above can be reinforced at the front, rear, center, side, lower and upper sides by members having a closed cross-section, such as a box shape with a square cross-section and a pipe shape with a square cross-section in which channels with a "U"-shaped cross-section are joined together.

[0105] In addition, the frame structure 100 according to one form of the present disclosure can effectively distribute the load of the front suspension 1 through the front and rear cross members 10 and 20 and the center and lower reinforcement units 30 and 50 while avoiding interference with the front suspension 1 .

[0106] Therefore, in one form of the present disclosure, there is an advantage in terms of strength and rigidity, and the durability of the frame structure of the vehicle body can be increased more stably.

[0107] While the present disclosure has been described in connection with what are presently considered to be practical exemplary forms, it is to be understood that the present disclosure is not limited to the forms disclosed, but is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

[0108] Description of the tag

[0109] 1: Front suspension

[0110] 3: Wheel cover

[0111] 10: Front crossbeam

[0112] 20: Rear crossbeam

[0113] 11, 12, 21, 22, 36a, 36b: channel components

[0114] 30: Center reinforcement unit

[0115] 31: First reinforcement member

[0116] 32: Second reinforcement member

[0117] 33: The third reinforcement member

[0118] 34: Fourth reinforcement member

[0119] 35: Fifth reinforcement member

[0120] 40: Side reinforcement unit

[0121] 41: Side lower reinforcement member

[0122] 43: Side reinforcement member

[0123] 45: First connecting member

[0124] 47: Second connecting member

[0125] 50: Lower reinforcement unit

[0126] 51: Front upper channel plate

[0127] 52: Front lower channel plate

[0128] 53: Rear upper channel plate

[0129] 54: Rear lower channel plate

[0130] 55: Center Plate

[0131] 56: Center lower channel component

[0132] 60: Front reinforcement unit

[0133] 61, 71: First pipeline component

[0134] 62, 72: Second pipeline component

[0135] 70: Rear reinforcement unit

[0136] 80: Upper reinforcement unit

[0137] 81: Third pipeline component

[0138] 83: Fourth pipeline component

[0139] 91: First suspension mounting assembly

[0140] 92: Second suspension mounting assembly

[0141] 93: Third suspension mounting assembly

[0142] 95: First mounting bracket

[0143] 96: Second mounting bracket

[0144] 97: Strengthen the panel

[0145] 100: Framework

Claims

1. A frame structure with an independent suspension system for a commercial vehicle, the frame structure comprising: A front cross member installed at the lower front end of the wheel housing along the vehicle width direction; a rear cross member installed at a lower rear end of the wheel housing in a vehicle width direction, wherein the wheel housing is arranged between the front cross member and the rear cross member in a vehicle body length direction; a central reinforcement unit mounted on the inner lower side of the wheel housing and disposed between the wheel housings, the central reinforcement unit being configured to connect the front cross member and the rear cross member along a vehicle body length direction; a side reinforcement unit mounted on an inner side of the wheel housing and connected to the center reinforcement unit; and a lower reinforcement unit configured to be connected to the central reinforcement unit and coupled to the first suspension mounting assembly through the rear cross member, Wherein, the central reinforcement unit comprises: a plurality of first reinforcing members mounted on the side reinforcing unit, each of the plurality of first reinforcing members being configured to include at least two channel members each having a U-shaped cross section, wherein at least two of the channel members are joined to each other to form a rectangular cross section, and at least two of the channel members are arranged along the length direction of the vehicle body; and A plurality of second reinforcing members are mounted on the side reinforcing unit, the plurality of second reinforcing members being configured to have a square cross section and being disposed in an up-and-down direction between the first reinforcing members.

2. The frame structure according to claim 1, further comprising: a front reinforcement unit mounted on an inner front side of the wheel house and connected to the front cross member and the side reinforcement unit; as well as A rear reinforcement unit is mounted on an inner rear side of the wheel house and connected to the rear cross member and the side reinforcement unit.

3. The frame structure according to claim 2, wherein: The front reinforcement unit and the rear reinforcement unit include: a plurality of first duct members having a rectangular cross section and arranged along the vehicle width direction; and A plurality of second duct members having a rectangular cross section are connected to the first duct member and are arranged in an up-and-down direction. 4 . The frame structure according to claim 1 , further comprising an upper reinforcement unit installed on an inner upper surface of the wheel house and connected to the side reinforcement unit.

5. The frame structure according to claim 4, wherein: The upper reinforcement unit comprises: at least one third duct member having a rectangular cross section and an arched form, and at least one of the third duct members is mounted on the inner upper surface of the wheel housing; and The fourth duct member has a square cross section and is connected to the third duct member in the vehicle width direction.

6. The frame structure of claim 1 further comprising a second suspension mounting assembly mounted on the front cross member.

7. The frame structure according to claim 1, further comprising a third suspension mounting assembly mounted on the side reinforcement unit.

8. The frame structure according to claim 1, wherein: The front cross member and the rear cross member are configured in the form of a box having a rectangular cross section in which channel members having a "U"-shaped cross section are joined together.

9. The frame structure according to claim 1, wherein: The central reinforcement unit also includes: a third reinforcing member mounted on a lower surface of the plurality of first reinforcing members, and the third reinforcing member is configured to have a square cross section; a fourth reinforcing member having a "U"-shaped cross section opened in a downward direction and mounted on the lower surfaces of the plurality of first reinforcing members; and A fifth reinforcing member having a "U"-shaped cross section opened in an upward direction and mounted on the lower surfaces of the plurality of first reinforcing members.

10. The frame structure according to claim 1, wherein: The side reinforcement unit comprises: a side lower reinforcement member configured to have a square cross section, the side lower reinforcement member being connected to the center reinforcement unit and being installed on a lower inner side of the wheel house in a vehicle body length direction; and A pair of side upper reinforcement members are configured to have a square cross section, are spaced apart from the side lower reinforcement members, and are installed on the side portions of the wheel housing along a vehicle body length direction.

11. The frame structure according to claim 10, wherein: The side reinforcement unit also includes: a first connecting member configured to have a square cross section, the first connecting member connecting the side lower reinforcing member and the side upper reinforcing member in an up-down direction between the side lower reinforcing member and the side upper reinforcing member; and A second connection member, configured to have a square cross section, connects an upper surface of the wheel house and the side upper reinforcement member and is disposed in an up-down direction.

12. The frame structure according to claim 11, further comprising: A third suspension mounting assembly is mounted on the side reinforcement unit, Wherein, the third suspension mounting assembly comprises: a pair of first mounting brackets mounted on the side reinforcement members; and A second mounting bracket is between a pair of the first mounting brackets and is configured to be mounted to the first connection member through a reinforcement panel.

13. The frame structure according to claim 1, wherein: The lower reinforcement unit comprises: a front upper channel plate connected to the central reinforcement unit along the vehicle width direction; a front lower channel plate connected to a lower surface of the front upper channel plate; a rear upper channel panel provided separately from the front upper channel panel and connected to the center reinforcement unit in a vehicle width direction; and A rear lower channel plate is connected to the bottom of the rear upper channel plate.

14. The frame structure according to claim 13, wherein: The lower reinforcement unit further comprises: a center plate connecting the front upper channel plate and the rear upper channel plate between the front upper channel plate and the rear upper channel plate; and A center lower channel member is connected to the bottom of the center panel.

15. The frame structure according to claim 1, wherein: The frame structure is constructed in the body of a large commercial vehicle including a double-decker electric bus vehicle.

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