Chassis and logistics distribution vehicle

Abstract

The present invention relates to the field of logistics and distribution technology, and discloses a chassis and a logistics distribution vehicle. The chassis includes a frame and a front suspension, the front suspension includes a front axle and a connecting arm, the connecting arm is connected to the frame and to the front axle, the connecting arm includes a first arm, a second arm, a third arm and a fourth arm connected in sequence, and the first arm, the second arm, the third arm and the fourth arm together form an M-shaped structure. The logistics distribution vehicle includes the above-mentioned chassis. The chassis and logistics distribution vehicle provided by the present invention have improved steering performance, strong overall load-bearing capacity, strong durability, simple and flexible structure, low cost, and high structural strength. At the same time, they have multiple connection points with the frame, which enhances the connection strength between the front axle and the frame, ensures driving safety, reduces the risk of logistics distribution losses, and meets the requirements of the new generation of logistics distribution vehicles.

Description

Technical Field

[0001] The present invention relates to the technical field of logistics and distribution, and in particular to a chassis and a logistics and distribution vehicle. Background Art

[0002] With the rise of e-commerce, online shopping accounts for an increasingly large proportion of people's shopping habits. To a certain extent, traditional logistics delivery vehicles can no longer adapt to the increasing delivery volume. Therefore, in order to improve delivery efficiency and alleviate the delivery pressure of couriers, unmanned logistics delivery vehicles have appeared on the market.

[0003] However, most existing unmanned logistics delivery vehicles are small AGVs (Automated Guided Vehicles), consisting solely of a battery, controller, and motor, with limited functionality. The chassis of existing unmanned logistics delivery vehicles typically lacks front and rear suspensions. Even where these are available, the front suspension is often a double-wishbone or leaf spring structure, resulting in complex, heavy, and costly structures. Furthermore, the chassis' overall load-bearing capacity is weak, durability is poor, functionality is limited, application scope is narrow, and operational safety is poor, failing to meet the requirements of the next generation of logistics delivery vehicles. Summary of the Invention

[0004] Based on the above problems, the purpose of the present invention is to provide a chassis and a logistics distribution vehicle with a simple and flexible structure, low cost, strong overall carrying capacity and strong durability.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A chassis includes a frame and a front suspension, wherein the front suspension includes a front axle and a connecting arm, wherein the connecting arm is connected to the frame and to the front axle, and wherein the connecting arm includes a first arm, a second arm, a third arm, and a fourth arm connected in sequence, wherein the first arm, the second arm, the third arm, and the fourth arm together form an M-shaped structure.

[0007] As a preferred embodiment of the chassis of the present invention, the M-shaped structure includes two first connecting ends and three second connecting ends, the two first connecting ends are located at the front end of the M-shaped structure, and the three second connecting ends are located at the rear end of the M-shaped structure, and both the first connecting ends and the second connecting ends are connected to the frame.

[0008] As a preferred solution of the chassis of the present invention, the frame includes an electrical compartment, a first mounting seat is provided on the front side wall of the electrical compartment, and the second connecting end is connected to the first mounting seat.

[0009] As a preferred solution of the chassis of the present invention, a mounting sleeve is connected to the second connecting end, the first mounting seat includes two ear plates, the mounting sleeve is clamped between the two ear plates, and is connected to the two ear plates through an axle pin.

[0010] As a preferred embodiment of the chassis of the present invention, the front ends of the first arm and the fourth arm are both provided with downwardly bent extensions, the free ends of the extensions are the first connecting ends, the front suspension further includes a front shock absorber, the extensions are connected to the frame via the front shock absorber, one end of the front shock absorber is hinged to the first connecting end, and the other end is connected to the frame.

[0011] As a preferred embodiment of the chassis of the present invention, the chassis further comprises a rear suspension, the rear suspension comprising a rear axle and a multi-link assembly, the multi-link assembly comprising a first rod, a second rod, a third rod and a fourth rod, one end of the first rod, the second rod, the third rod and the fourth rod are all connected to the vehicle frame, and the other ends are all rotatably connected to the rear axle, and the connection points of the first rod, the second rod, the third rod and the fourth rod and the vehicle frame are the four vertices of an isosceles trapezoid.

[0012] As a preferred embodiment of the chassis of the present invention, the length of the second rod is 1.5 times the length of the first rod, the length of the fourth rod is 1.5 times the length of the third rod, the axial angle between the first rod and the third rod and the rear axle is 110°, and the axial angle between the second rod and the fourth rod and the rear axle is 55°.

[0013] As a preferred solution of the chassis of the present invention, the rear suspension further includes a stabilizer bar, one end of which is connected to the rear axle, and the other end of which is configured to be connected to the vehicle frame.

[0014] As a preferred solution of the chassis of the present invention, the vehicle frame includes a load-bearing frame, a suspension beam is provided at the rear of the load-bearing frame, a third mounting seat is provided on the suspension beam, and the third mounting seat is configured to mount a stabilizer bar of the rear suspension.

[0015] A logistics distribution vehicle comprises the chassis described above.

[0016] The beneficial effects of the present invention are:

[0017] The chassis and logistics delivery vehicle provided by the present invention include a frame and a front suspension. Compared with the chassis of the logistics delivery vehicle in the prior art that is not provided with a front suspension, the chassis has improved steering performance, strong overall load-bearing capacity, and strong durability. The front suspension includes a front axle and a connecting arm. The connecting arm is connected to the frame and to the front axle. The connecting arm includes a first arm, a second arm, a third arm and a fourth arm connected in sequence. The first arm, the second arm, the third arm and the fourth arm together form an M-shaped structure. Compared with the double swing arm structure or the leaf spring structure in the prior art, the M-shaped structure has a strong load-bearing capacity, a simple and flexible structure, low cost, and high structural strength. At the same time, it has multiple connection points with the frame, which enhances the connection strength between the front axle and the frame, ensures driving safety, reduces the risk of logistics distribution losses, and meets the requirements of the new generation of logistics delivery vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without any creative work.

[0019] Figure 1 is a top view of a chassis provided in a specific embodiment of the present invention;

[0020] Figure 2 It is a structural schematic diagram of a chassis provided by a specific embodiment of the present invention;

[0021] Figure 3 is a first axonometric view of a vehicle frame provided by a specific embodiment of the present invention;

[0022] Figure 4 is a second axonometric view of a vehicle frame provided by a specific embodiment of the present invention;

[0023] Figure 5 is a third axonometric view of a vehicle frame provided in a specific embodiment of the present invention;

[0024] Figure 6 is a first axonometric view of a front suspension provided by a specific embodiment of the present invention;

[0025] Figure 7 is a bottom view of a front suspension provided by a specific embodiment of the present invention;

[0026] Figure 8 A second axonometric view of the front suspension provided by an embodiment of the present invention;

[0027] Figure 9 A schematic structural diagram of a rear suspension provided in a specific embodiment of the present invention;

[0028] Figure 10 A top view of a rear suspension is provided in accordance with a specific embodiment of the present invention.

[0029] In the picture:

[0030] 1-frame; 2-front suspension; 3-rear suspension;

[0031] 11-Electrical appliance compartment; 12-Carrying frame; 13-Anti-collision protection structure;

[0032] 111-first mounting seat; 112-second mounting seat; 113-steering gear mounting seat; 1131-mounting inclined plane;

[0033] 121 - cantilever beam; 1211 - third mounting seat; 122 - mounting plate; 123 - mounting lug; 124 - mounting bracket; 125 - reinforcement diagonal beam.

[0034] 21-front axle; 22-connecting arm; 23-front shock absorber; 24-ball joint; 25-first connecting rod; 26-second connecting rod; 211-guide member;

[0035] 221-first arm; 222-second arm; 223-third arm; 224-fourth arm; 225-extension portion; 226-mounting sleeve; 227-U-bolt; 228-reinforcement plate; 229-reinforcement cross arm;

[0036] 31-rear axle; 32-multi-link assembly; 33-stabilizer bar; 34-rear shock absorber; 35-connecting sleeve;

[0037] 311 - fourth mounting seat; 312 - fifth mounting seat; 313 - sixth mounting seat; 314 - seventh mounting seat;

[0038] 321-first shot; 322-second shot; 323-third shot; 324-fourth shot;

[0039] 100-front wheel hub; 200-steering gear; 300-rear wheel hub. DETAILED DESCRIPTION

[0040] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present invention more clearly understood, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It is apparent that the described embodiments are only some of the embodiments of the present invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be noted that the terms "center," "up," "down," "left," "right," "vertical," "horizontal," "inside," and "outside" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0042] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed or detachable connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention.

[0043] This embodiment provides a chassis that can be used in unmanned logistics delivery vehicles. It can be applied to logistics, express delivery, and sales in factory areas, parks, campuses, and other scenarios. It is suitable for short-distance logistics transportation in closed scenarios. The transported goods are small and light, and the service objects are the general public. Figures 1-10 As shown, the chassis includes a frame 1, a front suspension 2 and a rear suspension 3, as well as a power system, an electronic steering system, an electronic braking system and an electrical control system.

[0044] like Figure 3-Figure 5 As shown, the frame 1 includes an electrical compartment 11, a carrier frame 12 and two anti-collision protection structures 13. The electrical compartment 11 is configured to accommodate electrical components, and a first mounting seat 111 (such as Figure 3 As shown), the first mounting seat 111 is configured to install the front suspension 2, and a second mounting seat 112 (as shown) is provided on the rear side wall of the electrical compartment 11. Figure 4 As shown), the second mounting base 112 is configured to install the rear suspension 3. The carrier 12 is connected to the electrical compartment 11 and is configured to carry the carriage. The two anti-collision protection structures 13 are respectively connected to the front and rear ends of the carrier 12.

[0045] In this embodiment, the electrical compartment 11 can be made of steel plate with steel pipes as reinforcement on the side walls. The support frame 12 can also be made of steel pipes, which are lightweight and have a strong load-bearing capacity. A pressure sensor can be installed on the anti-collision protection structure 13 to sense the pressure signal when it touches an obstacle and send it to the controller for timely control and braking.

[0046] The electrical compartment 11 is used to accommodate electrical components and can provide environmental protection for the safe and stable operation of electrical components. The first mounting seat 111 is used to install the front suspension 2, and the second mounting seat 112 is used to install the rear suspension 3. Both the front and rear suspensions 3 can be installed to meet higher road conditions. It has diverse functions and a wide range of applications. The carrier 12 is connected to the electrical compartment 11 and is used to carry the carriage, which enhances the load-bearing capacity of the frame 1 and has good durability. Two anti-collision protection structures 13 are respectively connected to the front and rear ends of the carrier 12, which improve the safety and stability of operation and can meet the needs of the new generation of logistics distribution vehicles.

[0047] To enhance the connection strength of the front suspension 2, optionally, as Figure 3 As shown, three first mounting seats 111 are provided, and the three first mounting seats 111 are arranged side by side and spaced apart on the front side wall of the electrical compartment 11. In this embodiment, the first mounting seat 111 adopts two spaced apart ear plate structures, and the front suspension 2 can be hinged with the two ear plate structures through a sleeve.

[0048] To enhance the connection strength of the rear suspension 3, optionally, as Figure 4 As shown, four second mounting blocks 112 are provided, distributed along the four vertices of an isosceles trapezoid on the rear sidewall of the appliance compartment 11. In this embodiment, the second mounting blocks 112 utilize two spaced-apart lug structures, with the rear suspension 3 articulated to the two lug structures via sleeves. Because the four second mounting blocks 112 are distributed along the four vertices of the isosceles trapezoid, the structure maintains a balanced load-bearing structure and offers excellent durability.

[0049] To facilitate installation of the stabilizer bar 33 of the rear suspension 3, a suspension beam 121 is optionally provided at the rear of the carrier 12. A third mounting base 1211 is provided on the suspension beam 121. The third mounting base 1211 is configured to mount the stabilizer bar 33 of the rear suspension 3. In this embodiment, the third mounting base 1211 is configured as two spaced-apart ear-plate structures. The stabilizer bar 33 of the rear suspension 3 can be articulated with the two ear-plate structures via a sleeve.

[0050] To facilitate the arrangement of the electronic steering system, optionally, a mounting plate 122 is provided at an angle on the front of the carrier 12. The mounting plate 122 is configured to install the electronic steering system. A hole is provided on the mounting plate 122 for inserting a transmission arm of the electronic steering system. To facilitate the arrangement of the steering gear 200, optionally, the frame 1 also includes a steering gear mounting seat 113. The steering gear mounting seat 113 is provided at the bottom of the front side wall of the electrical compartment 11 and is configured to install the steering gear 200 of the front suspension 2. The steering gear mounting seat 113 is provided with an installation bevel 1131, which is arranged opposite the installation plate 122. The mounting plate 122 and the steering gear mounting seat 113 make the applicable functions of the frame 1 diverse and have a wide range of applications.

[0051] In order to facilitate the arrangement of the shock absorbers of the front suspension 2 and the rear suspension 3, the carrier frame 12 is optionally provided with a plurality of mounting lugs 123 (such as Figure 5 As shown in FIG. 1 , the mounting lugs 123 are configured to mount shock absorbers for the front and rear suspensions 2 and 3. This allows the vehicle frame 1 to be versatile and applicable to a wide range of applications. To facilitate mounting of the vehicle shell, mounting brackets 124 are optionally provided at the front and rear ends of the carrier frame 12, respectively. The mounting brackets 124 are configured to mount the vehicle shell. To enhance the carrying capacity of the carrier frame 12, the vehicle frame 1 may optionally further include a reinforcing diagonal beam 125, one end of which is connected to the side wall of the electrical compartment 11, and the other end of which is connected to the carrier frame 12.

[0052] like Figure 6-Figure 8 As shown, the front suspension 2 includes a front axle 21 and a connecting arm 22. The end of the front axle 21 is configured to be hinged to the front wheel hub 100, and the connecting arm 22 is configured to be connected to the vehicle frame 1 and the front axle 21. The connecting arm 22 includes a first arm 221, a second arm 222, a third arm 223, and a fourth arm 224 that are connected in sequence. The first arm 221, the second arm 222, the third arm 223, and the fourth arm 224 together form an M-shaped structure.

[0053] Compared with the double swing arm structure or leaf spring structure in the prior art, the M-shaped structure has strong load-bearing capacity, simple and flexible structure, low cost, and high structural strength. At the same time, it has multiple connection points with the frame 1, which enhances the connection strength between the front axle 21 and the frame 1, ensures driving safety, reduces the risk of logistics distribution losses, and meets the requirements of the new generation of logistics distribution vehicles.

[0054] To strengthen the connection between the front axle 21 and the vehicle frame 1, the M-shaped structure optionally includes two first connecting ends and three second connecting ends. The two first connecting ends are located at the front end of the M-shaped structure, and the three second connecting ends are located at the rear end of the M-shaped structure. Both the first connecting ends and the second connecting ends are configured to connect to the vehicle frame 1. By providing two first connecting ends and three second connecting ends, a total of five connection points, the connection between the front axle 21 and the vehicle frame 1 is strengthened, driving safety is ensured, and the risk of loss in logistics and distribution is reduced.

[0055] To facilitate the arrangement of the front shock absorber 23, the front ends of the first arm 221 and the fourth arm 224 are optionally provided with a downwardly bent extension 225, with the free end of the extension 225 serving as the first connecting end. Optionally, the front suspension 2 also includes a front shock absorber 23, and the extension 225 is connected to the vehicle frame 1 via the front shock absorber 23. One end of the front shock absorber 23 is hinged to the first connecting end, and the other end is connected to the vehicle frame 1. Specifically, the extension 225 is connected to the mounting lug 123 of the vehicle frame 1 via the front shock absorber 23. The shock-absorbing effect of the front shock absorber 23 can effectively buffer the impact force between the front axle 21 and the vehicle frame 1, thereby adapting to complex road conditions and reducing the risk of logistics and distribution losses.

[0056] To facilitate the connection of the second connecting end to the frame 1, optionally, a mounting sleeve 226 is connected to the second connecting end, and a first mounting seat 111 is provided on the frame 1. The first mounting seat 111 includes two ear plates. The mounting sleeve 226 is clamped between the two ear plates and is connected to the two ear plates through an axle pin.

[0057] To accommodate the compression deformation of the front shock absorber 23, the first arm 221 and the fourth arm 224 need to be rotatably connected to the front axle 21. Optionally, a guide member 211 is provided on the front axle 21. The guide member 211 is provided with an arcuate groove that cooperates with the outer peripheral wall of the front axle 21. The first arm 221 and the fourth arm 224 are rotatably connected to the front axle 21 through the guide member 211. The guide member 211 and the first arm 221 (or the fourth arm 224) are connected by bolts passing through. The guide member 211 can be a structure in which arcuate grooves are provided on the two side plates of the channel steel.

[0058] To tighten the first arm 221 (or fourth arm 224) against the guide member 211, the first arm 221 and the fourth arm 224 are optionally connected to the front axle 21 via U-bolts 227. The front axle 21 extends through the curved portion of the U-bolts 227. A reinforcement plate 228 is connected to the first arm 221 and the fourth arm 224, and the ends of the U-bolts 227 are connected to the reinforcement plate 228. The reinforcement plate is located on the side of the first arm (or the fourth arm 224) facing away from the guide member 211. Two U-bolts 227 are provided, one on each side of the guide member 211.

[0059] To facilitate steering, optionally, the front suspension 2 also includes a first link 25 and a second link 26 connected by a ball joint 24. The first link 25 is configured to drive the front wheel hub 100 to rotate relative to the front axle 21 to achieve steering, and the second link 26 is configured to be connected to the output shaft of the steering gear 200 to provide driving force for the first link 25.

[0060] To enhance the structural strength of the connecting arm 22, the connecting arm 22 optionally further includes two reinforcing cross arms 229, one of which is fixedly connected to the first arm 221 and the second arm 222, and the other is fixedly connected to the third arm 223 and the fourth arm 224. Of course, in other embodiments, the first arm 221, the second arm 222, the third arm 223, and the fourth arm 224 may be sequentially connected via a single reinforcing cross arm 229.

[0061] like Figure 9 and Figure 10 As shown, the rear suspension 3 includes a rear axle 31 and a multi-link assembly 32. The end of the rear axle 31 is configured to connect to the rear wheel hub 300. The multi-link assembly 32 includes a first link 321, a second link 322, a third link 323, and a fourth link 324. One end of each of the first link 321, the second link 322, the third link 323, and the fourth link 324 is configured to connect to the vehicle frame 1. The first link 321, the second link 322, the third link 323, and the fourth link 324 can be connected to the vehicle frame 1 using a connecting sleeve 35 and an axle pin. Specifically, one end of each of the first link 321, the second link 322, the third link 323, and the fourth link 324 is connected to the second mounting seat 112 of the vehicle frame 1. The other ends of the first rod 321, the second rod 322, the third rod 323 and the fourth rod 324 are all rotatably connected to the rear axle 31. The connection points of the first rod 321, the second rod 322, the third rod 323 and the fourth rod 324 with the frame 1 are the four vertices of an isosceles trapezoid. The structure is symmetrical, the force is evenly distributed, the load-bearing capacity is strong, the structure is simple and flexible, the cost is low, and the structural strength is high. At the same time, it has multiple connection points with the frame 1, which enhances the connection strength between the rear axle 31 and the frame 1, ensures driving safety, reduces the risk of logistics and distribution losses, and meets the requirements of the new generation of logistics and distribution vehicles.

[0062] To ensure optimal force distribution in the multi-link assembly 32, the length of the second link 322 is optionally 1.5 times the length of the first link 321, and the length of the fourth link 324 is optionally 1.5 times the length of the third link 323. To further ensure optimal force distribution in the multi-link assembly 32, the axial angle between the first link 321 and the third link 323 and the rear axle 31 is optionally 110°, and the axial angle between the second link 322 and the fourth link 324 and the rear axle 31 is 55°.

[0063] To facilitate the installation of the first rod 321 and the second rod 322, a fourth mounting base 311 is optionally provided on the rear axle 31. The first rod 321 and the second rod 322 are rotatably mounted on the fourth mounting base 311. In this embodiment, the fourth mounting base 311 is a channel steel with four holes defined on its two side panels. One end of the first rod 321 or the second rod 322 is rotatably connected to the fourth mounting base 311 via a connecting sleeve 35 and an axle pin. The fourth mounting base 311 can be fixed to the rear axle 31 by bolts or welded to the rear axle 31.

[0064] To facilitate the installation of the third rod 323 and the fourth rod 324, a fifth mounting base 312 is optionally provided on the rear axle 31. The fifth mounting base 312 is spaced apart from the fourth mounting base 311, and the third rod 323 and the fourth rod 324 are rotatably mounted on the fourth mounting base 311. In this embodiment, the fifth mounting base 312 and the fourth mounting base 311 have similar structures.

[0065] To enhance the stability of the rear axle 31, the rear suspension 3 optionally further includes a stabilizer bar 33, one end of which is connected to the rear axle 31 and the other end of which is configured to be connected to the vehicle frame 1. Specifically, the other end of the stabilizer bar 33 is connected to the third mounting bracket 1211 of the suspension beam 121 of the vehicle frame 1. To facilitate installation of the stabilizer bar 33, a sixth mounting bracket 313 is optionally provided vertically on the rear axle 31, with one end of the stabilizer bar 33 rotatably mounted on the sixth mounting bracket 313. The sixth mounting bracket 313 can be fixedly connected to the rear axle 31 via bolts or welded thereto.

[0066] To improve shock absorption performance, the rear suspension 3 optionally includes two spaced-apart rear shock absorbers 34. One end of each rear shock absorber 34 is connected to the rear axle 31, and the other end is configured to be connected to the vehicle frame 1. Specifically, the other end of each rear shock absorber 34 is connected to the mounting lug 123 of the vehicle frame 1. To facilitate installation of the rear shock absorber 34, a seventh mounting base 314 is optionally provided on the rear axle 31, and one end of each rear shock absorber 34 is rotatably mounted on the seventh mounting base 314.

[0067] The chassis provided in this embodiment includes a frame 1, a front suspension 2 and a rear suspension 3. The frame 1 includes an electrical compartment 11, a carrier 12 and two anti-collision protection structures 13. The electrical compartment 11 is used to accommodate electrical components and can provide environmental protection for the safe and stable operation of electrical components. A first mounting seat 111 is provided on the front side wall of the electrical compartment 11, and the first mounting seat 111 is used to install the front suspension 2. A second mounting seat 112 is provided on the rear side wall of the electrical compartment 11, and the second mounting seat 112 is used to install the rear suspension 3. The front and rear suspensions 3 can be installed to meet higher road conditions, with diverse functions and a wide range of applications. The carrier 12 is connected to the electrical compartment 11 and is used to carry the carriage, thereby enhancing the load-bearing capacity of the frame 1 and having good durability. The two anti-collision protection structures 13 are respectively connected to the front and rear ends of the carrier 12, thereby improving the safety and stability of operation.

[0068] The front suspension 2 includes a front axle 21 and a connecting arm 22. The end of the front axle 21 is used to be hinged to the front wheel hub 100. The connecting arm 22 is used to connect to the frame 1 and to the front axle 21. The connecting arm 22 includes a first arm 221, a second arm 222, a third arm 223 and a fourth arm 224 connected in sequence. The first arm 221, the second arm 222, the third arm 223 and the fourth arm 224 together form an M-shaped structure. Compared with the double swing arm structure or the leaf spring structure in the prior art, the M-shaped structure has a strong bearing capacity, a simple and flexible structure, low cost and high structural strength. At the same time, it has multiple connection points with the frame 1, which enhances the connection strength between the front axle 21 and the frame 1, ensures driving safety, reduces the risk of logistics distribution losses, and meets the requirements of the new generation of logistics distribution vehicles.

[0069] The rear suspension 3 includes a rear axle 31 and a multi-link assembly 32. The end of the rear axle 31 is used to connect to the rear wheel hub 300. The multi-link assembly 32 includes a first rod 321, a second rod 322, a third rod 323 and a fourth rod 324. One end of the first rod 321, the second rod 322, the third rod 323 and the fourth rod 324 are all used to be connected to the frame 1, and the other ends are all rotatably connected to the rear axle 31. The connection points of the first rod 321, the second rod 322, the third rod 323 and the fourth rod 324 with the frame 1 are the four vertices of an isosceles trapezoid. The structure is symmetrical, the force is uniform, the load-bearing capacity is strong, the structure is simple and flexible, the cost is low, and the structural strength is high. At the same time, it has multiple connection points with the frame 1, which enhances the connection strength between the rear axle 31 and the frame 1, ensures driving safety, reduces the risk of logistics distribution losses, and meets the requirements of the new generation of logistics distribution vehicles.

[0070] This embodiment also provides a logistics distribution vehicle, including the above-mentioned chassis, which has strong carrying capacity, simple and flexible structure, low cost, and high structural strength, ensuring driving safety, reducing the risk of logistics distribution losses, and meeting the requirements of the new generation of logistics distribution vehicles.

[0071] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A chassis, characterized in that: The vehicle comprises a frame (1) and a front suspension (2), wherein the front suspension (2) comprises a front axle (21) and a connecting arm (22), wherein the connecting arm (22) is connected to the frame (1) and to the front axle (21), and wherein the connecting arm (22) comprises a first arm (221), a second arm (222), a third arm (223), and a fourth arm (224) connected in sequence, wherein the first arm (221), the second arm (222), the third arm (223), and the fourth arm (224) together form an M-shaped structure; The end of the front axle (21) is configured to be hinged to the front wheel hub (100), and the first arm (221) and the fourth arm (224) are rotatably connected to the front axle (21); The M-shaped structure comprises two first connecting ends and three second connecting ends, the two first connecting ends are located at the front end of the M-shaped structure, the three second connecting ends are located at the rear end of the M-shaped structure, and both the first connecting ends and the second connecting ends are connected to the vehicle frame (1); The front suspension (2) further includes a front shock absorber (23), and the two first connection ends are connected to the vehicle frame (1) via the front shock absorber (23).

2. The chassis according to claim 1, characterized in that The vehicle frame (1) comprises an electrical appliance compartment (11), a first mounting seat (111) is provided on a front side wall of the electrical appliance compartment (11), and the second connecting end is connected to the first mounting seat (111).

3. The chassis according to claim 2, characterized in that The second connecting end is connected to a mounting sleeve (226), the first mounting seat (111) includes two ear plates, the mounting sleeve (226) is clamped between the two ear plates, and is connected to the two ear plates via an axle pin.

4. The chassis according to claim 1, characterized in that The front ends of the first arm (221) and the fourth arm (224) are both provided with a downwardly bent extension portion (225), the free end of the extension portion (225) being the first connecting end, the extension portion (225) being connected to the vehicle frame (1) via the front shock absorber (23), one end of the front shock absorber (23) being hinged to the first connecting end, and the other end being connected to the vehicle frame (1).

5. The chassis according to any one of claims 1 to 4, characterized in that: The chassis further comprises a rear suspension (3), the rear suspension (3) comprising a rear axle (31) and a multi-link assembly (32), the multi-link assembly (32) comprising a first rod (321), a second rod (322), a third rod (323) and a fourth rod (324), one end of each of the first rod (321), the second rod (322), the third rod (323) and the fourth rod (324) being connected to the vehicle frame (1), and the other end of each of the first rod (321), the second rod (322), the third rod (323) and the fourth rod (324) being rotatably connected to the rear axle (31), and the connection points of the first rod (321), the second rod (322), the third rod (323) and the fourth rod (324) with the vehicle frame (1) being the four vertices of an isosceles trapezoid.

6. The chassis according to claim 5, characterized in that The length of the second rod (322) is 1.5 times the length of the first rod (321), the length of the fourth rod (324) is 1.5 times the length of the third rod (323), the axial angle between the first rod (321) and the third rod (323) and the rear axle (31) is 110°, and the axial angle between the second rod (322) and the fourth rod (324) and the rear axle (31) is 55°.

7. The chassis according to claim 5, characterized in that The rear suspension (3) further includes a stabilizer bar (33), one end of which is connected to the rear axle (31), and the other end of which is configured to be connected to the vehicle frame (1).

8. The chassis according to claim 7, characterized in that The vehicle frame (1) comprises a carrier frame (12), a suspension beam (121) is provided at the rear of the carrier frame (12), a third mounting seat (1211) is provided on the suspension beam (121), and the third mounting seat (1211) is configured to mount a stabilizing bar (33) of the rear suspension frame (3).

9. A logistics distribution vehicle, characterized in that: Comprising a chassis as described in any one of claims 1-8.

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