Vehicle structure

Abstract

To provide a vehicle structure that allows a large-capacity battery pack to be installed in a chassis-cab vehicle mounted with the battery pack and can effectively protect the battery pack at the time of a collision accident of the vehicle and that increases a cruising distance of the vehicle and can improve collision safety and ultimately maximize vehicle's marketability.SOLUTION: A vehicle structure of the present invention includes: rear side sills provided on the outer side of side members so as to be connected to the rear of cab side sills provided on both sides of a cab; and side extension members extended long and laterally along a vehicle body to connect between the side member and the rear side sill.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a technology for the structure of a chassis cab vehicle equipped with a battery pack on the lower side.

Background Art

[0002] A chassis cab vehicle is composed of a chassis and a cab, and there is no separate vehicle body component provided behind the cab in the front of the vehicle. It is configured so that rear-mounted items such as a deck or a container can be selectively mounted behind the cab afterwards.

[0003] When configuring the above-described chassis cab vehicle as an electric vehicle, a battery pack can be mounted on the lower side of the vehicle body. Such a battery pack preferably can increase the loading amount as much as possible to sufficiently ensure the cruising range of the vehicle, and must be appropriately protected in case of a collision accident or the like of the vehicle.

[0004] The matters described as the above background art are only for enhancing the understanding of the background of the present invention, and it should not be accepted as admitting that they correspond to the prior art already known to those having ordinary knowledge in the technical field.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] An object of the present invention is to provide a vehicle structure that can mount a battery pack with a relatively large capacity in a chassis cab vehicle equipped with a battery pack, and can effectively protect the battery pack in the event of a vehicle collision accident, increase the cruising range of the vehicle, improve the collision safety, and ultimately maximize the commercial value of the vehicle.

Means for Solving the Problems

[0007] The vehicle structure of the present invention for achieving the above object is a rear side sill provided outside a side member so as to be connected to the rear of a cab side sill provided on both sides of the cab, and a side extension member provided along the lateral direction of the vehicle body so as to connect between the side member and the rear side sill, and is characterized by being configured to include the same.

[0008] a center cross member is provided so as to connect between the side members on both sides of the vehicle body, the side extension member may be arranged on the same straight line along the lateral direction of the vehicle body as the center cross member.

[0009] Each of the center cross member and the side extension member may be configured with a closed cross section linearly extending along the lateral direction of the vehicle body.

[0010] Each of the center cross member and the side extension member may be formed by combining a "u"-shaped lower member and an "n"-shaped upper member to form the closed cross section.

[0011] a battery pack is provided below the side member, the total lengths of the center cross member and the side extension member may be formed to be larger than the width of the battery pack.

[0012] The pack side members at both side ends of the battery pack may be fixed to the cab side sill and the rear side sill.

[0013] The rear end portion of the rear side sill may extend further rearward and longer than the rear end portion of the battery pack.

[0014] A leaf spring is installed behind the battery pack. A plurality of the center cross members and the side extension members are provided respectively. The rear end portion of the rear side sill may be coupled to the side extension member to which the front portion of the leaf spring is attached among the plurality of side extension members.

[0015] The side member behind the cab may have a closed cross-section structure having the same upper end height as the upper end heights of the center cross member and the side extension member.

[0016] Rear-mounted items are mounted on the upper side of the side member behind the cab. A plurality of support cross members overlapping the upper sides of the center cross member and the side extension member may be provided below the mounting panel of the rear-mounted item.

[0017] Among the support cross members, the support cross members overlapping the upper side of the side extension member may be provided with a length longer than the width of the battery pack and extending at least to the upper side of the rear side sill.

[0018] Among the support cross members, the support cross members not overlapping the side extension member may be provided with a length extending at least to the upper side of the side member.

[0019] Mounting bolts that penetrate the mounting panel and the support cross member may be coupled to the side extension member or the side member so as to fix the rear-mounted article above the side member.

[0020] The mounting bolts coupled to the side extension member may be coupled to the side extension member between the battery module housed in the battery pack in the horizontal direction and the rear side sill.

[0021] The side extension member to which the front portion of the leaf spring is attached incorporates a bulkhead that supports the upper side of the front portion of the leaf spring. The mounting bolts may penetrate and be coupled to the side extension member and the bulkhead.

[0022] The rear portion of the leaf spring is attached to rear mounting members protruding from both sides of the side member. The mounting bolts may be coupled to the rear mounting members above the rear portion of the leaf spring.

[0023] The mounting bolts may be coupled to the side member.

[0024] Between the mounting panel and the support cross member, a number of pipe members may be provided that penetrate inwardly with the mounting bolts and support the mounting panel and the support cross member in the vertical direction.

Advantages of the Invention

[0025] The present invention aims to be able to mount a battery pack with as large a capacity as possible in a chassis cab vehicle equipped with a battery pack, while effectively protecting the battery pack in the event of a vehicle collision accident, increasing the cruising range of the vehicle, improving the collision safety, and ultimately maximizing the commercial value of the vehicle.

Brief Description of the Drawings

[0026]

Figure 1

Figure 2

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Figure 5

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Figure 11

Embodiments for Carrying Out the Invention

[0027] Hereinafter, with reference to the accompanying drawings, the embodiments disclosed in this specification will be described in detail. However, regardless of the drawing numbers, the same or similar components are denoted by the same reference numerals, and repeated description thereof will be omitted.

[0028] The suffixes “module” and “section” for the components used in the following description are given or used interchangeably only for ease of specification writing, and do not have meanings or roles that distinguish them from each other by themselves.

[0029] In describing the embodiments disclosed in this specification, if it is determined that a specific description of related known technologies may obscure the gist of the embodiments disclosed in this specification, the detailed description thereof will be omitted. Also, the accompanying drawings are only for facilitating understanding of the embodiments disclosed in this specification, and the technical idea disclosed in this specification is not limited by the accompanying drawings, and it should be understood that all modifications, equivalents or alternatives included in the idea and technical scope of the present invention are included.

[0030] Terms including ordinal numbers such as “first” and “second” can be used to describe various components, but these components are not limited by these terms. These terms are used only for the purpose of distinguishing one component from another.

[0031] When a component is described as being “connected to” or “attached to” another component, it should be understood that it may be directly connected or attached to the other component, or another component may be interposed therebetween. On the other hand, when a component is described as being “directly connected to” or “directly attached to” another component, it should be understood that no other component is interposed therebetween.

[0032] Singular expressions include plural expressions unless the context clearly has a different meaning.

[0033] In this specification, terms such as "comprising" or "having" are intended to specify the presence of the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, and should be understood not to preclude in advance the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0034] Referring to FIGS. 1 to 11, an embodiment of the vehicle structure of the present invention includes a rear side sill 7 provided outside a side member 5 so as to be connected to the rear of a cab side sill 3 provided on both sides of a cab 1, and a side extension member 9 provided along the lateral direction of the vehicle body so as to connect between the side member 5 and the rear side sill 7.

[0035] The cab 1 at the front of the vehicle has a driver's seat configured inside and the cab side sills 3 are provided at the lower ends on both sides, and a rear-mounted item 11 is mounted on the upper side of the side member 5 at the rear.

[0036] Here, the rear-mounted item 11 is used in the general sense of referring to various devices such as a container or a deck. In this embodiment, an example in which a deck 13 is mounted on such a rear-mounted item 11 is described, and the present invention is applicable to vehicles mounting all types of rear-mounted items 11.

[0037] A conventional ordinary chassis cab vehicle does not include the rear side sill 7, but in the present invention, by providing the rear side sill 7 and the side extension member 9 as described above, it is possible to provide stronger rigidity in the event of an accident such as a side collision of the vehicle.

[0038] In this embodiment, a center cross member 15 is provided between the side members 5 on both sides of the vehicle body so as to connect them, and the side extension member 9 is arranged on the same straight line along the lateral direction of the vehicle body as the center cross member 15.

[0039] In particular, each of the center cross member 15 and the side extension member 9 is configured with a structure in which a closed cross section extends linearly along the lateral direction of the vehicle body.

[0040] Further, the side member 5 behind the cab is formed to have a closed cross-section structure having the same upper end height as the upper end heights of the center cross member 15 and the side extension member 9.

[0041] In the present embodiment, each of the center cross member 15 and the side extension member 9 has a structure in which a "U"-shaped lower member 17 and an "N"-shaped upper member 19 are joined to form the closed cross section, and the side member 5 can also be formed to have a similar structure and a closed cross-section structure.

[0042] That is, a conventional chassis cab vehicle includes only the side member 5 and the center cross member 15, and these side member 5 and center cross member 15 are generally composed of only a "U"-shaped member with an open upper side. However, in the present invention, all of these are configured with a structure forming a closed cross section, and while adding the side extension member 9, the side extension member 9 forms a shape in which the closed cross section of the center cross member 15 extends in the lateral direction of the vehicle body, thereby configuring a structure for firmly supporting the rear side sill 7, so that a more robust collision performance of the vehicle can be ensured.

[0043] Incidentally, the side member 5 extends to the front of the vehicle through the lower side of the cab 1 to form a main skeleton of the vehicle body.

[0044] Also, as shown in FIGS. 6 and 7, a battery pack 21 can be mounted on the lower side of the vehicle of the present invention.

[0045] That is, a battery pack 21 is provided below the side member 5, and the total lengths of the center cross member 15 and the side extension member 9 are formed to be larger than the width of the battery pack 21.

[0046] Pack side members 6 at both side ends of the battery pack 21 are fixed to the cab side sill 3 and the rear side sill 7.

[0047] Therefore, in the event of an accident such as a side collision of the vehicle, the battery pack 21 can be safely protected without being directly exposed to an external impact by the cab side sill 3, the rear side sill 7, the side extension member 9, the side member 5, the center cross member 15, etc.

[0048] In particular, as described above, the present invention is configured to increase the size of the battery pack 21 that can be mounted on the vehicle without being exposed to an external impact by configuring the rear side sill 7 and the side extension member 9, and as a result, more battery modules 23 can be mounted to increase the cruising range of the vehicle.

[0049] The rear end portion of the rear side sill 7 has a structure that extends further rearward than the rear end portion of the battery pack 21, so that the battery pack 21 can be completely protected from a side collision of the vehicle or the like.

[0050] On the other hand, a leaf spring 25 is provided behind the battery pack 21, a large number of the center cross members 15 and the side extension members 9 are provided respectively, and the rear end portion of the rear side sill 7 is coupled to the side extension member 9 to which the front portion of the leaf spring 25 is attached among the large number of side extension members 9.

[0051] Therefore, a structure is formed that can more firmly support the front portion of the leaf spring 25.

[0052] A rear-mounted item 11 is attached to the upper side of the side member 5 behind the cab, and a number of support cross members 29 that overlap the upper sides of the center cross member 15 and the side extension member 9 are provided below the mounting panel 27 of the rear-mounted item 11.

[0053] Among the support cross members 29, the support cross members 29 that overlap the upper side of the side extension member 9 are provided with a length longer than the width of the battery pack 21 and extending at least to the upper side of the rear side 7, so as to be able to provide additional rigidity for protecting the battery pack 21 in the case of a side collision of the vehicle or the like.

[0054] Also, among the support cross members 29, the support cross members 29 that do not overlap the side extension member 9 are provided with a length extending at least to the upper side of the side member 5.

[0055] That is, in the present embodiment, the support cross members 29 located in the vicinity of the suspension device including the leaf spring 25 do not overlap the side extension member 9 and extend above the side member 5 in a state of overlapping the center cross member 15, but extend only to such an extent that they do not interfere with the suspension device.

[0056] A mounting mount bolt 31 that penetrates the mounting panel 27 and the support cross member 29 is coupled to the side extension member 9 or the side member 5 so as to fix the rear-mounted item 11 to the upper side of the side member 5.

[0057] As shown in FIG. 8, the mounting mount bolt 31 coupled to the side extension member 9 is coupled to the side extension member 9 between the battery module 23 housed in the battery pack 21 and the rear side sill 7 in the horizontal direction.

[0058] Therefore, based on the part where the mounting mount bolt 31 is fastened, a part of the outer rear side sill 7 and the side extension member 9 functions as a part that absorbs impact while deforming in the case of a side collision accident of the vehicle or the like, and the remaining part of the side extension member 9, the side member 5, and the center cross member 15 within the mounting mount bolt 31 provide rigidity to support the impact force input from the side and function as a part to protect the battery module 23 housed in the battery pack 21.

[0059] Referring to FIG. 9, a bulkhead 33 that supports the upper side of the front portion of the leaf spring 25 is built in the side extension member 9 to which the front portion of the leaf spring 25 is attached, and the mounting mount bolt 31 passes through the side extension member 9 and the bulkhead 33 and is coupled.

[0060] Also, the rear portion of the leaf spring 25 is attached to rear mount members 35 protruding from both sides of the side member 5; as shown in FIG. 11, the mounting mount bolt 31 is coupled to the rear mount member 35 above the rear portion of the leaf spring 25.

[0061] Therefore, the parts to which the front and rear portions of the leaf spring 25 are attached have a more rigid support state.

[0062] A part of the mounting mount bolt 31 is coupled to the side member 5.

[0063] That is, as shown in FIG. 10, at a part where there is a risk of interference with parts of the suspension device such as the leaf spring 25, while appropriately restricting the length of the support cross member 29 to avoid interference with the suspension parts, the mounting mount bolt 31 is coupled to the side member 5 so as to firmly fix the rear mounted product 11 above the side member 5.

[0064] Between the mounting panel 27 and the support cross member 29, a number of pipe members 37 are provided, with the mounting mount bolts 31 passing through them from the inside to support the mounting panel 27 and the support cross member 29 in the vertical direction.

[0065] Also, welding nuts 39 and the like can be provided on the side extension member 9, side member 5, bulkhead 33, rear mount member 35, etc., so that the mounting mount bolts 31 can be fastened.

[0066] Although the present invention has been illustrated and described in connection with specific embodiments, it will be apparent to those of ordinary skill in the art that various improvements and changes can be made to the present invention without departing from the technical idea of the present invention provided by the following claims.

Explanation of Signs

[0067] 1 Cab 3 Cab side sill 5 Side member 6 Pack side member 7 Rear side sill 9 Side extension member 11 Rear-mounted item 13 Deck 15 Center cross member 17 Lower member 19 Upper member 21 Battery pack 23 Battery module 25 Leaf spring 27 Mounting panel 29 Support cross member 31 Mounting mount bolt 33 Bulkhead 35 Rear mount member 37 Pipe member 39 Welding nut

Claims

1. A rear side sill is provided on the outer side of the side member so as to be connected to the rear of the cab side sill provided on both sides of the cab; a side extension member extending along a lateral direction of the vehicle body so as to connect between the side member and the rear side sill.

2. A center cross member is provided to connect the side members on both sides of the vehicle body, 2. The vehicle structure according to claim 1, wherein the side extension member and the center cross member are disposed on the same straight line along a lateral direction of the vehicle body.

3. 3. The vehicle structure according to claim 2, wherein each of the center cross member and the side extension members has a closed cross section that extends linearly along a lateral direction of the vehicle body.

4. 4. The vehicle structure according to claim 3, wherein each of the center cross member and the side extension members is formed by combining a "u"-shaped lower member and an "n"-shaped upper member to form the closed cross section.

5. A battery pack is provided under the side member, The vehicle structure according to claim 3 , wherein the center cross member and the side extension members have an overall length greater than a width of the battery pack.

6. The vehicle structure according to claim 5 , wherein pack side members at both ends of the battery pack are fixed to the cab side sill and the rear side sill.

7. The vehicle structure according to claim 5 , wherein a rear end of the rear side sill extends further rearward than a rear end of the battery pack.

8. A leaf spring is provided behind the battery pack. The center cross member and the side extension member are each provided in large numbers, 8. The vehicle structure according to claim 7, wherein a rear end of the rear side sill is coupled to one of the side extension members to which a front portion of the leaf spring is attached.

9. 9. The vehicle structure according to claim 8, wherein the side member at the rear of the cab has a closed cross-sectional structure having an upper end height equal to the upper end heights of the center cross member and the side extension members.

10. A rear mounted item is attached to the upper side of the rear side member of the cab, 10. The vehicle structure according to claim 9, further comprising a plurality of support cross members provided below the mounting panel for the rear mounted item and overlapping the center cross member and the upper sides of the side extension members.

11. 11. The vehicle structure according to claim 10, wherein the support cross member overlapping the upper side of the side extension member is longer than the width of the battery pack and has a length extending at least to the upper side of the rear side sill.

12. 11. The vehicle structure according to claim 10, wherein the support cross members that do not overlap the side extension members are provided with a length that extends at least to an upper side of the side members.

13. 11. The vehicle structure according to claim 10, wherein a mounting mount bolt passing through the mounting panel and the support cross member is connected to the side extension member or the side member so as to fix the rear mounting item to the upper side of the side member.

14. 14. The vehicle structure according to claim 13, wherein the mounting bolt coupled to the side extension member is coupled to the side extension member horizontally between the battery module housed in the battery pack and the rear side sill.

15. A bulkhead that supports an upper side of the front portion of the leaf spring is built into the side extension member to which the front portion of the leaf spring is attached, The vehicle structure according to claim 13, wherein the mounting bolt is coupled to the side extension member by passing through the side extension member and the bulkhead.

16. The rear portion of the leaf spring is attached to a rear mount member protruding from each side of the side member, 16. The vehicle structure of claim 15, wherein the mounting bolt is coupled to the rear mounting member above the rear portion of the leaf spring.

17. 14. The vehicle structure of claim 13, wherein the mounting bolt is coupled to the side member.

18. The vehicle structure described in claim 13, characterized in that a number of pipe members are provided between the mounting panel and the support cross member, with the mounting mount bolts passing through them on the inside, and providing support between the mounting panel and the support cross member in the vertical direction.

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