Unmanned vehicle and chassis structure thereof

Abstract

The utility model provides an unmanned vehicle and a chassis structure thereof, the chassis structure of the unmanned vehicle comprises a frame, and the frame comprises a front frame and a rear frame; the front frame is provided with a front suspension mounting part, and the rear frame is provided with a battery mounting part and a rear suspension mounting part which are sequentially distributed in the front-back direction of the whole vehicle; the front frame comprises a front upper support and a front lower support which are oppositely arranged in the up-down direction of the whole vehicle, the rear portion of the front upper support is provided with a rear connecting section, the rear connecting section is gradually arranged in a downward inclining mode from front to back in the front-back direction of the whole vehicle, and the rear end of the rear connecting section is connected with the front end of the rear frame. According to the chassis structure of the unmanned vehicle, on the premise that arrangement and installation of front suspension components are not affected, the rigidity of the front frame can be improved, the front frame and the rear frame can be better connected, and therefore it can be guaranteed that the whole structure has high rigidity and better bearing performance.

Description

Technical Field

[0001] The utility model relates to the technical field of unmanned vehicles, and particularly relates to a chassis structure of a driverless vehicle. At the same time, the utility model also relates to a driverless vehicle provided with the chassis structure of the driverless vehicle. Background Art

[0002] At present, the frame structure in low-speed driverless vehicles is the load-bearing matrix of the whole vehicle, and most components and assemblies of the vehicle (such as suspension, steering, battery, cargo box and related operating mechanisms, etc.) are fixedly connected through the frame. That is to say, the function of the frame is to support and connect the various components of the vehicle and bear various loads from inside and outside the vehicle. However, for existing unmanned vehicles, the design of their frame structures has deficiencies, making it impossible to well combine high overall structural stiffness and load-bearing performance, which is not conducive to the improvement of the overall vehicle quality and market competitiveness. Summary of the Utility Model

[0003] In view of this, the utility model aims to provide a chassis structure of a driverless vehicle, which can have high structural stiffness and better load-bearing performance.

[0004] To achieve the above object, the technical solution of the utility model is realized as follows:

[0005] A chassis structure of a driverless vehicle includes a frame, and the frame includes a front frame and a rear frame;

[0006] A front suspension mounting portion is provided on the front frame, and a battery mounting portion and a rear suspension mounting portion are provided on the rear frame and are distributed in sequence along the front-rear direction of the whole vehicle;

[0007] The front frame includes a front upper bracket and a front lower bracket that are oppositely arranged in the up-down direction of the whole vehicle. The rear part of the front upper bracket has a rear connection section, and the rear connection section is gradually inclined downward from front to rear along the front-rear direction of the whole vehicle, and the rear end of the rear connection section is connected to the front end of the rear frame.

[0008] Further, the front upper bracket includes front upper longitudinal beams respectively arranged on the left and right sides, and a front upper cross beam arranged between the front upper longitudinal beams on both sides; the front lower bracket includes front lower longitudinal beams respectively arranged on the left and right sides, and a front lower cross beam arranged between the front lower longitudinal beams on both sides; the rear parts of the front upper longitudinal beams on both sides both have the rear connection section, and the front upper longitudinal beam and the front lower longitudinal beam on the same side are connected through a first column assembly.

[0009] Further, a detachable front reinforcing cross beam is provided between the front upper side rails on both sides, and the front reinforcing cross beam is located in front of the front upper cross beam; and / or, the front suspension mounting portion includes a first mounting bracket provided at one end of the front lower cross beam and a second mounting bracket provided at the other end of the front lower cross beam. Both the first mounting bracket and the second mounting bracket are connected to the front lower side rail on the same side, and at least one steering gear mounting point is provided on both the first mounting bracket and the second mounting bracket.

[0010] Further, the front suspension mounting portion includes a third mounting bracket provided on the front upper cross beam and a fourth mounting bracket provided on each of the front upper side rails; a leaf spring mounting point is provided on the third mounting bracket, and a leaf spring stopper mounting point is provided on each of the fourth mounting brackets.

[0011] Further, the third mounting bracket includes a first connecting plate respectively provided on the front and rear sides of the front upper cross beam and a second connecting plate provided below the front upper cross beam. The second connecting plate is connected to both of the first connecting plates, and the leaf spring mounting point is provided on the second connecting plate; and / or, the fourth mounting bracket includes a base plate provided on the outer side of the front upper side rail close to the vehicle body, and a lower plate and an upper plate which are buckled with each other and provided on the base plate, and the leaf spring stopper mounting point is provided on the lower plate.

[0012] Further, the front suspension mounting portion includes a fifth mounting bracket and a sixth mounting bracket respectively provided on each of the front lower side rails on both sides; a shock absorber mounting point is provided on the fifth mounting bracket, and a swing arm mounting point is provided on the sixth mounting bracket.

[0013] Further, each of the fifth mounting brackets on both sides is respectively connected to the first column assembly on the same side; and / or, each of the sixth mounting brackets on both sides includes a swing arm mounting main body in a U shape. Swing arm mounting holes are provided on two opposite side walls of the swing arm mounting main body, and a limiting bracket is arranged corresponding to each swing arm mounting hole. Each of the limiting brackets is used to limit the mounting position of the swing arm.

[0014] Further, the rear frame includes a rear upper bracket and a rear lower bracket which are oppositely arranged in the up-down direction of the whole vehicle, and a second column assembly connected between the rear upper bracket and the rear lower bracket; a battery installation space is formed by enclosing among the rear upper bracket, the rear lower bracket and the second column assembly, and the battery installation portion includes a battery installation point provided on the rear lower bracket, and / or, the rear end of the rear upper bracket extends backward relative to the rear end of the rear lower bracket and forms a rear support section. The rear suspension mounting portion includes rear suspension mounting brackets respectively provided on the rear support section and the second column assembly.

[0015] Furthermore, the rear lower support bracket includes rear lower longitudinal beams separately disposed on the left and right sides. Each of the rear lower longitudinal beams has an inner cavity, and a longitudinal beam reinforcing plate is disposed in the inner cavity of each of the rear lower longitudinal beams. The battery mounting points include battery mounting holes disposed on the rear lower longitudinal beams; and / or, a reinforcing beam is disposed between the rear upper support bracket and the second column assembly.

[0016] Compared with the prior art, the present utility model has the following advantages:

[0017] For the chassis structure of the driverless vehicle described in the present utility model, through the cooperative setting of the front upper support bracket and the front lower support bracket, and by providing a rear connection section disposed at the rear of the front upper support bracket and gradually inclined downward from front to back along the longitudinal direction of the vehicle, and the rear end of the rear connection section is connected to the front end of the rear frame, it is beneficial to improve the stiffness of the front frame without affecting the layout and installation of the front suspension components, and enables a better connection between the front frame and the rear frame, thereby ensuring that the overall structure has high stiffness and better load-bearing performance, and thus is beneficial to improving the overall quality of the vehicle.

[0018] In addition, the front upper support bracket includes front upper longitudinal beams separately disposed on the left and right sides, and a front upper cross beam disposed between the front upper longitudinal beams on both sides. The front lower support bracket includes front lower longitudinal beams separately disposed on the left and right sides, and a front lower cross beam disposed between the front lower longitudinal beams on both sides, which is beneficial to form a "well" shaped structure, improve the structural strength of the front upper support bracket and the front lower support bracket, and ensure the overall stiffness of the front frame. At the same time, the setting of the first column assembly enables the front frame to have a large layout space, which is beneficial to the layout and installation of the front suspension components.

[0019] Secondly, the detachable front reinforcing cross beam can cooperate with the front upper cross beam to further improve the structural strength of the front upper support bracket, and can also utilize its convenient disassembly and assembly characteristics to meet the convenience of vehicle maintenance. By providing the first mounting bracket and the second mounting bracket, multi-point mounting of the steering gear can be formed to ensure the mounting stiffness of the steering gear. The setting of the third mounting bracket can provide a leaf spring mounting point for the installation of the leaf spring, and the setting of the fourth mounting bracket is beneficial to the installation of the leaf spring limit block.

[0020] Moreover, the third mounting bracket includes first connecting plates respectively disposed on the front and rear sides of the front upper crossbeam, and a second connecting plate disposed below the front upper crossbeam. The second connecting plate is connected to both first connecting plates, and the leaf spring mounting point is disposed on the second connecting plate, enabling a box-shaped structure to be formed between the second connecting plate, each first connecting plate, and the front upper crossbeam, improving the overall stiffness of the third mounting bracket, and further improving the reliability of the leaf spring mounting. The fourth mounting bracket includes a base plate disposed on the outer side of the front upper longitudinal beam close to the vehicle exterior, and a lower plate and an upper plate that are buckled with each other on the base plate, and a leaf spring stopper mounting point is disposed on the lower plate, enabling a cavity structure to be enclosed among the base plate, the upper plate, and the lower plate, so as to improve the stiffness of the fourth mounting bracket and the mounting stability of the leaf spring stopper.

[0021] Furthermore, the provision of the fifth mounting bracket and the sixth mounting bracket facilitates the arrangement and installation of the shock absorber and the swing arm. Each fifth mounting bracket is connected to the first column assembly on the same side, which can improve the stiffness of each fifth mounting bracket, and further improve the mounting stability of the shock absorber. The provision of the U-shaped swing arm mounting body can improve the stiffness of the sixth mounting bracket, facilitating the improvement of the swing arm mounting reliability. At the same time, with the cooperation of the limit bracket provided, it is conducive to the position adjustment during the swing arm installation process.

[0022] In addition, a battery installation space is formed by enclosing the rear upper bracket, the rear lower bracket, and the second column assembly, which can protect the power battery inside the rear frame, preventing the power battery from being damaged by bumping. The provision of the rear support section facilitates the arrangement and installation of the rear suspension mounting bracket, and further facilitates the arrangement and installation of the rear suspension. The combined provision of the rear lower longitudinal beam and the longitudinal beam reinforcing plate is conducive to improving the structural strength of the battery mounting point and ensuring the battery mounting stability. The provision of the reinforcing beam can enhance the stiffness of the rear support section, facilitating the ensuring of the load-bearing performance of the rear support section.

[0023] Another object of the present invention is to provide an autonomous vehicle, in which the above-mentioned autonomous vehicle chassis structure is provided.

[0024] The autonomous vehicle of the present invention is provided with the above-mentioned autonomous vehicle chassis structure, which is conducive to improving the overall stiffness and load-bearing performance of the chassis, and is conducive to improving the vehicle quality and market competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, and do not constitute an improper limitation to the present invention. In the drawings:

[0026] Figure 1 is a schematic diagram of the overall structure of the autonomous vehicle chassis structure according to the embodiment of the present invention;

[0027] Figure 2 is Figure 1 an enlarged view of part A in

[0028] Figure 3 a schematic structural view of the lower half of the front frame according to an embodiment of the present utility model;

[0029] Figure 4 a schematic structural view of the second mounting bracket according to an embodiment of the present utility model;

[0030] Figure 5 a schematic structural view of the upper half of the front frame according to an embodiment of the present utility model;

[0031] Figure 6 a schematic structural view of the third mounting bracket according to an embodiment of the present utility model;

[0032] Figure 7 a schematic structural view of the rear frame according to an embodiment of the present utility model;

[0033] Figure 8 is Figure 7 an enlarged view of part B in

[0034] Figure 9 is Figure 7 an enlarged view of part C in

[0035] Figure 10 a schematic structural view of the rear lower longitudinal beam according to an embodiment of the present utility model;

[0036] Figure 11 a schematic structural view of the longitudinal beam reinforcing plate according to an embodiment of the present utility model;

[0037] Explanation of reference numerals:

[0038] 1, front frame; 2, rear frame;

[0039] 11, front upper bracket; 111, front upper longitudinal beam; 1111, rear connection section; 112, front upper cross beam; 113, front reinforcing cross beam; 1131, middle section; 1132, side section; 114, connection beam;

[0040] 12, front lower bracket; 121, front lower longitudinal beam; 122, front lower cross beam;

[0041] 13, first column; 14, first mounting bracket; 15, second mounting bracket;

[0042] 16, third mounting bracket; 161, first connecting plate; 162, second connecting plate;

[0043] 17. Fourth mounting bracket; 171. Substrate; 172. Lower plate; 1721. Welding nut; 173. Upper plate;

[0044] 18. Fifth mounting bracket;

[0045] 19. Sixth mounting bracket; 191. Swing arm mounting body; 1911. Swing arm mounting hole; 192. Limit bracket;

[0046] 20. Battery installation space;

[0047] 21. Rear upper bracket; 211. Rear upper longitudinal beam; 2111. Rear support section; 212. Rear upper cross beam; 213. Rear upper inclined beam;

[0048] 22. Rear lower bracket; 221. Rear lower longitudinal beam; 2210. Battery installation hole; 2211. Main positioning hole; 2212. Plug welding hole; 2213. Observation hole; 2214. Longitudinal beam reinforcement plate; 22141. Auxiliary positioning hole; 222. Rear lower cross beam;

[0049] 23. Second column; 24. Reinforcing beam;

[0050] 25. Seventh mounting bracket; 251. Main body part; 252. Limit part;

[0051] 26. Eighth mounting bracket;

[0052] 27. Ninth mounting bracket; 271. Pipe main body; 272. Mounting plate;

[0053] 28. Tenth mounting bracket; 281. First bottom plate; 282. First connecting bracket; 283. Mounting top plate;

[0054] 29. Eleventh mounting bracket; 291. Second bottom plate; 292. Second connecting bracket; 293. Mounting sleeve. Detailed implementation manners

[0055] It should be noted that, without conflict, the embodiments and features in the embodiments of the present utility model may be combined with each other.

[0056] In the following description, for the purpose of illustration rather than limitation, specific details such as specific system structures and technologies are put forward in order to thoroughly understand the embodiments of the present application. However, those skilled in the art should clearly understand that the present application may also be implemented in other embodiments without these specific details. In other cases, the detailed descriptions of well-known systems, devices, circuits and methods are omitted so as not to impede the description of the present application with unnecessary details.

[0057] In the description of the present utility model, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model. In addition, if terms such as "first", "second", etc. appear, they are also only for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0058] Taking the vehicle where the chassis structure of the driverless vehicle described in the present utility model is located as an example, the orientation terms such as "upper, lower, left, right, front, rear" used in the embodiments are defined based on the up and down direction (also known as the height direction, or the vehicle's Z direction), left and right direction (also known as the width direction, or the vehicle's Y direction), and front and rear direction (also known as the length direction, or the vehicle's X direction) of the vehicle. "Inner" and "outer" are defined based on the contour of the corresponding component. For example, "inner" and "outer" defined based on the vehicle contour, with the side closer to the middle of the vehicle as "inner", and vice versa as "outer".

[0059] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installed", "connected", "connected", and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in combination with specific situations.

[0060] The present utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0061] Embodiment 1

[0062] This embodiment relates to a chassis structure of a driverless vehicle, which is particularly applicable to driverless vehicles to improve the overall stiffness and load-bearing performance of the vehicle chassis.

[0063] In terms of the overall structure, as Figures 1 to 11 shown in, the chassis structure of the driverless vehicle in this embodiment includes a vehicle frame, and the vehicle frame includes a front frame 1 and a rear frame 2. Moreover, a front suspension mounting portion is provided on the front frame 1, and a battery mounting portion and a rear suspension mounting portion are provided on the rear frame 2 and are distributed in sequence along the front and rear directions of the vehicle.

[0064] The front frame 1 includes a front upper bracket 11 and a front lower bracket 12 that are arranged relatively in the up-down direction of the whole vehicle. The rear part of the front upper bracket 11 has a rear connecting section 1111. The rear connecting section 1111 is gradually inclined downward from front to back in the front-rear direction of the whole vehicle, and the rear end of the rear connecting section 1111 is connected to the front end of the rear frame 2.

[0065] At this time, with the above settings, through the cooperative setting of the front upper bracket 11 and the front lower bracket 12, and by arranging the rear connecting section 1111 that is gradually inclined downward from front to back in the front-rear direction of the whole vehicle at the rear part of the front upper bracket 11, and the rear end of the rear connecting section 1111 is connected to the front end of the rear frame 2, it is beneficial to improve the stiffness of the front frame 1 without affecting the layout and installation of the front suspension components, and enables a better connection between the front frame 1 and the rear frame 2, thereby ensuring that the overall structure has higher stiffness and better load-bearing performance, and thus is beneficial to the improvement of the overall vehicle quality.

[0066] Based on the above overall introduction, specifically speaking, in this embodiment, during the specific implementation, still as Figure 1 shown, a connecting beam 114 that is inclined and connected to the rear frame 2 can also be provided on the front frame 1 to improve the connection strength between the two. At the same time, the front frame 1 and the front suspension mounting part are particularly suitable for arranging and installing a transverse leaf spring independent suspension, and the rear frame 2 and the rear suspension mounting part are particularly suitable for a longitudinal leaf spring non-independent suspension. Therefore, when introducing in the following text of this embodiment, the components to be installed on the front suspension mounting part are mainly the relevant components in the transverse leaf spring independent suspension, and the components to be installed on the rear suspension mounting part are mainly the relevant components in the longitudinal leaf spring non-independent suspension.

[0067] In this embodiment, as a preferred implementation form, in combination with Figure 1 、 Figure 3 and Figure 5 shown, the front upper bracket 11 includes front upper longitudinal beams 111 arranged on the left and right sides respectively, and a front upper cross beam 112 arranged between the front upper longitudinal beams 111 on both sides. The front lower bracket 12 includes front lower longitudinal beams 121 arranged on the left and right sides respectively, and a front lower cross beam 122 arranged between the front lower longitudinal beams 121 on both sides. The rear parts of the front upper longitudinal beams 111 on both sides both have rear connecting sections 1111, and the front upper longitudinal beam 111 and the front lower longitudinal beam 121 on the same side are connected by a first column 13 assembly.

[0068] It can be understood that the front upper bracket 11 includes front upper longitudinal beams 111 disposed on the left and right sides respectively, and a front upper cross beam 112 disposed between the front upper longitudinal beams 111 on both sides. And the front lower bracket 12 includes front lower longitudinal beams 121 disposed on the left and right sides respectively, and a front lower cross beam 122 disposed between the front lower longitudinal beams 121 on both sides, which is conducive to forming a "well" - shaped structure, improving the structural strength of the front upper bracket 11 and the front lower bracket 12, so as to ensure the overall stiffness of the front frame 1. At the same time, the setting of the first column 13 assembly enables the front frame 1 to have a larger layout space, which is conducive to the layout and installation of the front suspension components.

[0069] Still referring to Figure 1 and Figure 3 shown, to ensure the overall stiffness of the front frame 1, the first column 13 assembly of this embodiment includes multiple first columns 13. At the same time, the arrangement mode and specific quantity of the first columns 13 can also be set and adjusted accordingly according to the actual structural performance requirements of the front frame 1. For example, there are four first columns 13, and two first columns 13 are arranged at intervals in the front - rear direction of the vehicle body between the front upper longitudinal beam 111 and the front lower longitudinal beam 121 on the same side. When necessary, the rear first column 13 can support below the rear connection section 1111.

[0070] Furthermore, in this embodiment, as a preferred implementation form, as Figure 5 shown, a detachable front reinforcing cross beam 113 is provided between the front upper longitudinal beams 111 on both sides, and the front reinforcing cross beam 113 is located in front of the front upper cross beam 112. By setting the detachable front reinforcing cross beam 113, it can cooperate with the front upper cross beam 112 to further improve the structural strength of the front upper bracket 11, and it can also utilize its own convenient disassembly and assembly characteristics to meet the convenience of vehicle maintenance.

[0071] Specifically in implementation, the front reinforcing cross beam 113 of this embodiment is as Figure 5 shown, which includes side sections 1132 respectively disposed on each front upper longitudinal beam 111, and an intermediate section 1131 detachably disposed between the two side sections 1132. The specific disassembly method can adopt the commonly used screw - connection form in the art. For example, the two side sections 1132 are respectively fixedly connected to the front upper longitudinal beam 111 on the same side, and the two ends of the intermediate section 1131 are respectively screwed to the corresponding side sections 1132.

[0072] At the same time, in this embodiment, as a preferred implementation form, still as Figure 3As shown in the figure, the front suspension mounting portion includes a first mounting bracket 14 provided at one end of the front lower cross member 122, and a second mounting bracket 15 provided at the other end of the front lower cross member 122. Both the first mounting bracket 14 and the second mounting bracket 15 are connected to the front lower longitudinal beam 121 on the same side, and at least one steering gear mounting point is provided on both the first mounting bracket 14 and the second mounting bracket 15.

[0073] Here, by providing the first mounting bracket 14 and the second mounting bracket 15, multi-point mounting of the steering gear can be formed, which is beneficial to ensuring the mounting stiffness of the steering gear. In specific implementation, in this embodiment, the first mounting bracket 14 and the second mounting bracket 15 can be arranged relatively left and right, and the steering gear mounting points on both the first mounting bracket 14 and the second mounting bracket 15 can specifically be steering gear mounting holes. As for the number of steering gear mounting points (i.e., steering gear mounting holes), it can be set and adjusted according to the actual mounting requirements of the steering gear. For example, one steering gear mounting point is provided on the first mounting bracket 14, and two steering gear mounting points are provided on the second mounting bracket 15, etc.

[0074] Moreover, in this embodiment, the first mounting bracket 14 and the second mounting bracket 15 can preferably be set in a U shape, which is beneficial to having better structural stiffness for itself. At the same time, referring to Figure 4 As shown in the figure, when two or more steering gear mounting points are provided on the second mounting bracket 15, a reinforcing plate can preferably be provided in the U-shaped area of the second mounting bracket 15 to enhance the stiffness. Secondly, in this embodiment, to enhance the overall stiffness of the front lower bracket 12, one or more reinforcing lower cross members can also be provided in front of or behind the front lower cross member 122.

[0075] In addition, in this embodiment, as a preferred implementation form, referring to Figure 5 As shown in the figure, the front suspension mounting portion includes a third mounting bracket 16 provided on the front upper cross member 112, and a fourth mounting bracket 17 provided on each front upper longitudinal beam 111. Among them, a leaf spring mounting point is provided on the third mounting bracket 16, and a leaf spring limit block mounting point is provided on each fourth mounting bracket 17. It can be understood that the setting of the third mounting bracket 16 can provide a leaf spring mounting point, which is beneficial to the mounting of the leaf spring, and the setting of the fourth mounting bracket 17 is beneficial to the mounting of the leaf spring limit block.

[0076] Specifically, in this embodiment, as a preferred implementation form, in combination with Figure 6 As shown in the figure, the third mounting bracket 16 includes a first connecting plate 161 respectively provided on the front and rear sides of the front upper cross member 112, and a second connecting plate 162 provided below the front upper cross member 112. The second connecting plate 162 is connected to both first connecting plates 161, and a leaf spring mounting point is provided on the second connecting plate 162. In the specific structure, the leaf spring mounting point can be a leaf spring mounting hole on the second connecting plate 162.

[0077] The main advantage of such a setting is that it can enable the third mounting bracket 16 to have a relatively large connection area with the front upper cross beam 112, thereby ensuring the stability of the third mounting bracket 16. It can also form a box-shaped structure between the second connecting plate 162 and each first connecting plate 161 and the front upper cross beam 112, improving the overall stiffness of the third mounting bracket 16, and further improving the reliability of leaf spring installation.

[0078] Secondly, in this embodiment, as a preferred implementation form, continue to refer to Figure 5 As shown, the fourth mounting bracket 17 includes a base plate 171 provided on the outer side of the front upper longitudinal beam 111 close to the vehicle exterior, and a lower plate 172 and an upper plate 173 that are buckled on the base plate 171, and a leaf spring limit block mounting point is provided on the lower plate 172. Thus, a cavity structure can be enclosed between the base plate 171, the upper plate 173 and the lower plate 172 to improve the stiffness of the fourth mounting bracket 17 and the mounting stability of the leaf spring limit block.

[0079] When specifically setting, the above-mentioned lower plate 172 can preferably be U-shaped, the upper plate 173 can preferably be L-shaped, the upper plate 173 is buckled inside the lower plate 172. At the same time, the leaf spring limit block mounting point can specifically be a leaf spring limit block mounting hole, and for the convenience of installing the leaf spring limit block, a welding nut 1721 corresponding to the leaf spring limit block mounting hole can also be preferably provided on the lower plate 172, etc.

[0080] In addition, in this embodiment, as a preferred implementation form, still as Figure 5 As shown, the front suspension mounting portion includes a fifth mounting bracket 18 and a sixth mounting bracket 19 respectively provided on each side of the front lower longitudinal beam 121. Among them, a shock absorber mounting point is provided on the fifth mounting bracket 18, and a swing arm mounting point is provided on the sixth mounting bracket 19. In this way, based on the settings of the fifth mounting bracket 18 and the sixth mounting bracket 19, it is beneficial to the arrangement and installation of the shock absorber and the swing arm.

[0081] In this embodiment, and as a preferred implementation form, each side of the fifth mounting bracket 18 is respectively connected to the first column 13 assembly on the same side. In this way, the stiffness of each fifth mounting bracket 18 can be improved, and further the mounting stability of the shock absorber can be improved. Specifically, the fifth mounting bracket 18 includes a support portion connected to the first column 13 of the corresponding rear connection section 1111, and a shock absorber mounting point provided on the support portion, and this shock absorber mounting point can adopt the shock absorber mounting structure well-known to those skilled in the art.

[0082] Also as a preferred implementation form, in this embodiment, each sixth mounting bracket 19 on each side includes a U-shaped swing arm mounting main body 191. Swing arm mounting holes 1911 are provided on two opposite side walls of the swing arm mounting main body 191, and limit brackets 192 are arranged corresponding to the swing arm mounting holes 1911. Each limit bracket 192 is used to limit the mounting position of the swing arm. Here, the setting of the U-shaped swing arm mounting main body 191 can improve the stiffness of the sixth mounting bracket 19, which is beneficial to improving the reliability of swing arm mounting. At the same time, with the cooperation of the limit brackets 192, it is conducive to position limiting and adjustment during the swing arm mounting process.

[0083] Of course, to ensure the connection stability between the swing arm mounting main body 191 and the front lower longitudinal beam 121, the swing arm mounting main body 191 can be connected to the front lower longitudinal beam 121 through a bottom connecting plate, and the limit bracket 192 can be set as a structure similar to the shape of a window to facilitate position limiting and adjustment during the swing arm mounting process.

[0084] In addition, in this embodiment, as a preferred implementation form, as Figure 7 shown, the rear frame 2 includes a rear upper bracket 21 and a rear lower bracket 22 that are oppositely arranged in the up-down direction of the whole vehicle, and a second column 23 assembly connected between the rear upper bracket 21 and the rear lower bracket 22. Moreover, a battery installation space 20 is formed by enclosing between the rear upper bracket 21, the rear lower bracket 22 and the second column 23 assembly, and the battery installation part includes a battery installation point provided on the rear lower bracket 22.

[0085] It can be understood that the battery installation space 20 formed by enclosing between the rear upper bracket 21, the rear lower bracket 22 and the second column 23 assembly can protect the power battery inside the rear frame 2 and prevent the power battery from being damaged by collision. During specific implementation, the second column 23 assembly is as Figure 7 shown in, which includes a plurality of second columns 23. The specific quantity and arrangement form can be the same as that of the first column 13, and can be set and adjusted according to the actual structural performance requirements of the rear frame 2, which will not be elaborated here.

[0086] Furthermore, in this embodiment, as a preferred implementation form, the rear end of the rear upper bracket 21 extends backward relative to the rear end of the rear lower bracket 22 and forms a rear support section 2111. The rear suspension installation part includes rear suspension mounting brackets provided on the rear support section 2111 and the second column 23 assembly respectively. The advantage of such a setting is that based on the setting of the rear support section 2111, it is beneficial to the arrangement and installation of the rear suspension mounting brackets, and thus beneficial to the arrangement and installation of the rear suspension.

[0087] In addition, in this embodiment, as a preferred implementation form, still as Figure 1 、 Figure 7 、Figure 10 and Figure 11 As shown in Figure 11 , the rear lower bracket 22 includes rear lower longitudinal beams 221 separately arranged on the left and right sides. Each rear lower longitudinal beam 221 has an inner cavity, and a longitudinal beam reinforcement plate 2214 is provided in the inner cavity of each rear lower longitudinal beam 221. The battery mounting points include battery mounting holes 2210 provided on the rear lower longitudinal beams 221. Thus, through the cooperative arrangement of the rear lower longitudinal beams 221 and the longitudinal beam reinforcement plates 2214, it is beneficial to improve the structural strength of the battery mounting points and ensure the stability of battery mounting.

[0088] During specific implementation, the longitudinal beam reinforcement plate 2214 can be connected to the rear lower longitudinal beam 221 by plug welding, and in combination with Figure 10 and Figure 11 As shown in Figure 11 , a plurality of plug welding holes 2212 can be provided on the rear lower longitudinal beam 221, and in order to ensure the welding position of the longitudinal beam reinforcement plate 2214, an observation hole 2213 for observing whether the longitudinal beam reinforcement plate 2214 is in the welding position is provided on the rear lower longitudinal beam 221. At the same time, a main positioning hole 2211 is provided on the rear lower longitudinal beam 221, and an auxiliary positioning hole 22141 is provided on the longitudinal beam reinforcement plate 2214. The combined use of the main and auxiliary positioning holes 22141 can achieve the positioning welding of the longitudinal beam reinforcement plate 2214.

[0089] Meanwhile, in this embodiment, as a preferred implementation form, a reinforcing beam 24 is provided between the rear upper bracket 21 and the second column 23 assembly, which is beneficial to enhancing the stiffness of the rear support section 2111 and ensuring the load-bearing performance of the rear support section.

[0090] Specifically speaking, the rear lower bracket 22 of this embodiment further includes a rear lower cross beam 222 provided between the rear lower longitudinal beams 221 on both sides, and the rear lower cross beam 222 is provided at both the front and rear ends of the rear lower bracket 22. Similarly, the rear upper bracket 21 of this embodiment is similar to the structure of the rear lower bracket 22. It also includes rear upper longitudinal beams 211 on the left and right sides, and a plurality of rear upper cross beams 212 provided between the rear upper longitudinal beams 211 on both sides. The rear support sections 2111 are provided at the rear ends of each rear upper longitudinal beam 211. When necessary, rear upper inclined beams 213 can be provided between each side rear upper longitudinal beam and the rear upper cross beam 212, and rear upper cross beams 212 can also be provided between the rear support sections 2111 on both sides to improve the stiffness and load-bearing performance of the rear part of the rear frame 2.

[0091] Moreover, during specific implementation, two second columns 23 arranged left and right are provided at the rear end of the rear upper bracket 21. Each reinforcing beam 24 is specifically provided between the rear support section 2111 and the second column 23 on the same side. At the same time, as a preferred implementation form, the reinforcing beam 24 is preferably set as a triangle. At this time, the two ends of the reinforcing beam 24 are respectively connected to the rear support section 2111 and the second column 23 to improve the strengthening effect of the structural stiffness.

[0092] Secondly, the rear suspension mounting brackets of this embodiment include seventh mounting brackets 25 provided on each second column 23, eighth mounting brackets 26 provided on each rear support section 2111, ninth mounting brackets 27, and eleventh mounting brackets 29, as well as tenth mounting brackets 28 provided on the tops of each rear upper longitudinal beam 211. Among them, the seventh mounting bracket 25 is used to mount the front spring eye of the leaf spring 272, the eighth mounting bracket 26 is used to mount the shock absorber, the ninth mounting bracket 27 is used to mount the leaf spring stop of the leaf spring 272, the eleventh mounting bracket 29 is used to mount the rear spring eye of the leaf spring 272, and the tenth mounting bracket 28 is used to mount load-carrying structures such as a cargo box and a multi-functional cabinet.

[0093] During specific implementation, the seventh mounting bracket 25 of this embodiment includes a U-shaped main body portion 251 provided on the second column 23, and limiting portions 252 provided on two opposite side walls of the main body portion 251. The limiting portions 252 are used to limit the bolts for mounting the front spring eye, and the main body portion 251 is arranged in a U shape, which is also beneficial to forming a semi-closed structure to ensure the mounting strength of the front spring eye of the leaf spring under high load. At the same time, the seventh mounting bracket 25 and the eighth mounting bracket 26 are preferably arranged at both ends of the hypotenuse of the reinforcing beam 24 to facilitate the layout and installation of the rear suspension (the above-mentioned longitudinally-mounted leaf spring non-independent suspension).

[0094] Furthermore, the ninth mounting bracket 27 of this embodiment may specifically include a pipe main body 271 provided at the bottom of the rear support section 2111, and a mounting plate 272 provided at the bottom of the pipe main body 271. This mounting plate 272 is used to connect with the leaf spring stop. The main advantage of such a setting is that it can provide relatively high mounting strength. Also as a preferred implementation form, the tenth mounting bracket 28 includes a first bottom plate 281 provided on the top of the rear upper longitudinal beam 211, a first connecting bracket 282 provided on the first bottom plate 281, and a mounting top plate 283 provided on the top of the first connecting bracket 282. The first connecting bracket 282 can be generally U-shaped as a whole, and is connected to both the top and side of the rear upper longitudinal beam 211 through the first bottom plate 281. The mounting top plate can be integrally formed with the first connecting bracket 282 to facilitate forming and stiffness improvement.

[0095] In this embodiment, also as a preferred implementation form, the eleventh mounting bracket 29 includes a second bottom plate 291 provided at the bottom of the rear support section 2111, a second connecting bracket 292 provided on the second bottom plate 291, and a mounting sleeve 293 provided at the bottom of the second connecting bracket 292. This mounting sleeve 293 is used to connect with the rear spring eye of the leaf spring. The advantage of such a setting is that it can ensure the structural strength and mounting reliability of the eleventh mounting bracket 29.

[0096] Of course, the quantity and arrangement form of each mounting bracket involved in this embodiment can be set and adjusted accordingly according to the actual front suspension components or rear suspension components to ensure the mounting reliability of each component.

[0097] In the chassis structure of the driverless vehicle of this embodiment, through the cooperative setting of the front upper bracket 11 and the front lower bracket 12, and by arranging a rear connection section 1111 that gradually slopes downward from front to back in the vehicle's front-rear direction at the rear of the front upper bracket 11, and the rear end of the rear connection section 1111 is connected to the front end of the rear frame 2, it is beneficial to improve the stiffness of the front frame 1 without affecting the layout and installation of the front suspension components, and enables a better connection between the front frame 1 and the rear frame 2, thereby ensuring that the overall structure has high stiffness and better load-bearing performance, and thus is beneficial to the improvement of the overall vehicle quality.

[0098] Embodiment 2

[0099] This embodiment relates to a driverless vehicle, in which the chassis structure of the driverless vehicle in Embodiment 1 is provided. Specifically, this driverless vehicle is preferably a low-speed driverless vehicle commonly known to those skilled in the art.

[0100] The driverless vehicle of this embodiment, by setting the chassis structure of the driverless vehicle in Embodiment 1, can have sufficient strength and stiffness, improve the overall performance of the chassis, facilitate the layout and installation of the front and rear suspension components, meet the requirements of the load-bearing matrix of the driverless vehicle, and thus is beneficial to various transportation scenarios of the driverless vehicle, making this driverless vehicle have higher market competitiveness.

[0101] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An unmanned vehicle chassis structure, comprising a frame, characterized in that: The frame comprises a front frame (1) and a rear frame (2); The front frame (1) is provided with a front suspension mounting portion, and the rear frame (2) is provided with a battery mounting portion and a rear suspension mounting portion which are sequentially distributed along the front-rear direction of the vehicle; The front frame (1) comprises a front upper bracket (11) and a front lower bracket (12) which are arranged relatively to each other in the vertical direction of the whole vehicle, and the rear part of the front upper bracket (11) has a rear connecting section (1111), and the rear connecting section (1111) is arranged to be gradually inclined downward from front to rear along the front-rear direction of the whole vehicle, and the rear end of the rear connecting section (1111) is connected to the front end of the rear frame (2).

2. The unmanned vehicle chassis structure according to claim 1, characterized in that: The front upper bracket (11) comprises a front upper longitudinal beam (111) arranged on the left and right sides, and a front upper cross beam (112) arranged between the front upper longitudinal beams (111) on the two sides; The front lower bracket (12) comprises a front lower longitudinal beam (121) disposed on the left and right sides, and a front lower cross beam (122) disposed between the front lower longitudinal beams (121) on the two sides; The rear parts of the front upper longitudinal beams (111) on both sides are provided with the rear connecting section (1111), and the front upper longitudinal beam (111) and the front lower longitudinal beam (121) on the same side are connected via a first column (13) assembly.

3. The unmanned vehicle chassis structure according to claim 2, characterized in that: A detachable front reinforcing cross beam (113) is provided between the front upper longitudinal beams (111) on both sides, and the front reinforcing cross beam (113) is located in front of the front upper cross beam (112); and / or, The front suspension mounting portion comprises a first mounting bracket (14) arranged at one end of the front lower cross beam (122), and a second mounting bracket (15) arranged at the other end of the front lower cross beam (122), the first mounting bracket (14) and the second mounting bracket (15) are both connected to the front lower longitudinal beam (121) on the same side, and at least one steering gear mounting point is provided on the first mounting bracket (14) and the second mounting bracket (15).

4. The unmanned vehicle chassis structure according to claim 2, characterized in that: The front suspension mounting portion comprises a third mounting bracket (16) arranged on the front upper cross beam (112), and a fourth mounting bracket (17) arranged on each of the front upper longitudinal beams (111); The third mounting bracket (16) is provided with a leaf spring mounting point, and each of the fourth mounting brackets (17) is provided with a leaf spring limit block mounting point.

5. The unmanned vehicle chassis structure according to claim 4, characterized in that: The third mounting bracket (16) comprises a first connecting plate (161) disposed at the front and rear sides of the front upper cross beam (112), and a second connecting plate (162) disposed below the front upper cross beam (112), wherein the second connecting plate (162) is connected to both of the first connecting plates (161), and the leaf spring mounting point is disposed on the second connecting plate (162); and / or, The fourth mounting bracket (17) comprises a base plate (171) arranged on the side of the front upper longitudinal beam (111) close to the outside of the vehicle, and a lower plate (172) and an upper plate (173) arranged on the base plate (171) and interlocked with each other, and the lower plate (172) is provided with the leaf spring limit block mounting point.

6. The unmanned vehicle chassis structure according to claim 2, characterized in that: The front suspension mounting portion comprises a fifth mounting bracket (18) and a sixth mounting bracket (19) respectively arranged on the front lower longitudinal beam (121) on each side; The fifth mounting bracket (18) is provided with a shock absorber mounting point, and the sixth mounting bracket (19) is provided with a swing arm mounting point.

7. The unmanned vehicle chassis structure according to claim 6, characterized in that: The fifth mounting bracket (18) on each side is respectively connected to the first column (13) assembly on the same side; and / or, The sixth mounting bracket (19) on each side comprises a U-shaped swing arm mounting body (191), two opposite side walls of the swing arm mounting body (191) are provided with swing arm mounting holes (1911), and limiting brackets (192) arranged corresponding to the swing arm mounting holes (1911), and each limiting bracket (192) is used to limit the installation position of the swing arm.

8. The unmanned vehicle chassis structure according to any one of claims 1 to 7, characterized in that: The rear frame (2) comprises a rear upper bracket (21) and a rear lower bracket (22) which are arranged relative to each other in the vertical direction of the vehicle, and a second column (23) assembly connected between the rear upper bracket (21) and the rear lower bracket (22); A battery installation space (20) is formed between the rear upper bracket (21), the rear lower bracket (22) and the second column (23) assembly, and the battery installation portion includes a battery installation point arranged on the rear lower bracket (22), and / or the rear end of the rear upper bracket (21) extends rearward relative to the rear end of the rear lower bracket (22) and forms a rear support section (2111), and the rear suspension installation portion includes rear suspension installation brackets respectively arranged on the rear support section (2111) and the second column (23) assembly.

9. The unmanned vehicle chassis structure according to claim 8, characterized in that: The rear lower bracket (22) comprises rear lower longitudinal beams (221) respectively arranged on the left and right sides, each of the rear lower longitudinal beams (221) has an inner cavity, and a longitudinal beam reinforcement plate (2214) is arranged in the inner cavity of each of the rear lower longitudinal beams (221), and the battery installation point comprises a battery installation hole (2210) arranged on the rear lower longitudinal beam (221); and / or, A reinforcing beam (24) is provided between the rear upper bracket (21) and the second upright column (23) assembly.

10. An unmanned vehicle, characterized in that: The unmanned vehicle is provided with the unmanned vehicle chassis structure according to any one of claims 1 to 9.

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