CN111301526A - Chassis and commodity circulation delivery car - Google Patents

Abstract

The invention relates to the technical field of logistics distribution, 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 with the frame and with the front axle, and the connecting arm includes a first arm, a second arm, a third arm connected in sequence. The arm and the fourth arm, 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 the logistics distribution vehicle provided by the invention have improved steering performance, strong overall bearing capacity, strong use durability, simple and flexible structure, low cost, and high structural strength. The strength of the connection between the front axle and the frame ensures driving safety, reduces the risk of loss of logistics and distribution, and meets the requirements of a new generation of logistics and distribution vehicles.

Description

A chassis and logistics distribution vehicle

technical field

The invention relates to the technical field of logistics distribution, in particular to a chassis and a logistics distribution vehicle.

Background technique

With the rise of e-commerce, online shopping accounts for a larger and larger proportion of people's shopping methods, and traditional logistics and distribution vehicles have been unable to adapt to the gradually increasing delivery volume to a certain extent. Distribution pressure, driverless logistics distribution vehicles have appeared in the market.

However, most of the existing unmanned logistics distribution vehicles are AGV (Automated Guided Vehicle) cars, which only consist of batteries, controllers and motors, and have a single function. The chassis of existing unmanned logistics distribution vehicles usually does not have front suspension and rear suspension. Even if they do, the front suspension is mostly double swing arm structure or leaf spring structure, and the structures of the front suspension and rear suspension are complex and bulky. high cost. In addition, the overall carrying capacity of the chassis is weak, the durability of use is poor, the function is relatively single, the scope of application is narrow, and the operation safety is poor, which cannot meet the requirements of the new generation of logistics and distribution vehicles.

SUMMARY OF THE INVENTION

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

For achieving the above object, the present invention adopts the following technical solutions:

A chassis includes a vehicle frame and a front suspension, the front suspension includes a front axle and a connecting arm, the connecting arm is connected with the vehicle frame and connected with the front axle, and the connecting arm comprises sequentially connecting The first arm, the second arm, the third arm and the fourth arm, the first arm, the second arm, the third arm and the fourth arm together form an M-shaped structure.

As a preferred solution of the chassis of the present invention, the M-shaped structure includes two first connecting ends and three second connecting ends, two of the first connecting ends are located at the front end of the M-shaped structure, and three of the first connecting ends are located at the front end of the M-shaped structure. The second connection end is located at the rear end of the M-shaped structure, and both the first connection end and the second connection end are connected to the vehicle frame.

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.

As a preferred solution of the chassis of the present invention, an installation sleeve is connected to the second connection end, the first installation seat includes two ear plates, and the installation sleeve is sandwiched between the two ear plates , and is connected to the two lugs through the shaft pin.

As a preferred solution of the chassis of the present invention, the front ends of the first arm and the fourth arm are provided with downwardly bent extension parts, the free ends of the extension parts are the first connection ends, and the The front suspension further includes a front shock absorber, the extension part is connected with the frame through the front shock absorber, one end of the front shock absorber is hinged with the first connection end, and the other end is connected with the Frame connection.

As a preferred solution of the chassis of the present invention, the chassis further includes a rear suspension, the rear suspension includes a rear axle and a multi-link assembly, and the multi-link assembly includes a first rod, a second rod, and a third rod and the fourth rod, one end of the first rod, the second rod, the third rod and the fourth rod are all connected with the frame, and the other ends are all connected with the rear axle in rotation. The connection points of the first rod, the second rod, the third rod and the fourth rod and the frame are the four vertices of an isosceles trapezoid.

As a preferred solution 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, and the length of the fourth rod is 1.5 times the length of the third rod. The axial included angle between the first rod and the third rod and the rear axle is 110°, and the axial included angle between the second rod and the fourth rod and the rear axle is 55°.

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

As a preferred solution of the chassis of the present invention, the frame includes a carrier, a suspension beam is provided at the rear of the carrier, and a third mounting seat is provided on the suspension beam, and the third mounting seat is configured to install the The stabilizer bar of the rear suspension.

A logistics distribution vehicle includes the above-mentioned chassis.

The beneficial effects of the present invention are:

The chassis and the logistics distribution vehicle provided by the present invention include a frame and a front suspension. Compared with the chassis of the logistics distribution vehicle without the front suspension in the prior art, the steering performance is improved, the overall bearing capacity is strong, and the use is durable. The front suspension includes a front axle and a connecting arm. The connecting arm is connected with the frame and connected with the front axle. The connecting arm includes a first arm, a second arm, a third arm and a fourth arm that are connected in sequence. The 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 strong bearing capacity, simple and flexible structure, low cost, and low structure. High 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 loss of logistics and distribution, and meets the requirements of a new generation of logistics and distribution vehicles.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. , for those of ordinary skill in the art, other drawings can also be obtained according to the contents of the embodiments of the present invention and these drawings without creative efforts.

1 is a top view of a chassis provided by a specific embodiment of the present invention;

2 is a schematic structural diagram of a chassis provided by a specific embodiment of the present invention;

3 is a first isometric view of a vehicle frame provided by a specific embodiment of the present invention;

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

5 is a third axonometric view of a vehicle frame provided by a specific embodiment of the present invention;

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

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

FIG. 8 is a second axonometric view of the front suspension provided by the specific embodiment of the present invention;

9 is a schematic structural diagram of a rear suspension provided by a specific embodiment of the present invention;

FIG. 10 is a top view of the rear suspension provided by the specific embodiment of the invention.

In the picture:

1-frame; 2-front suspension; 3-rear suspension;

11-electrical compartment; 12-carrying frame; 13-anti-collision protection structure;

111-first mounting seat; 112-second mounting seat; 113-steering gear mounting seat; 1131-installation slope;

121-suspension beam; 1211-the third mounting seat; 122-installation plate; 123-installation eye; 124-installation bracket; 125-reinforced inclined beam.

21-front axle; 22-connecting arm; 23-front shock absorber; 24-ball pair; 25-first link; 26-second link; 211-guide;

221-first arm; 222-second arm; 223-third arm; 224-fourth arm; 225-extension; 226-installation sleeve; 227-U-bolt; 228-reinforced plate; 229-reinforced cross arm;

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

311- the fourth mounting seat; 312- the fifth mounting seat; 313- the sixth mounting seat; 314- the seventh mounting seat;

321-first shot; 322-second shot; 323-third shot; 324-fourth shot;

100-front wheel hub; 200-steering machine; 300-rear wheel hub.

Detailed ways

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only the present invention. Some examples, but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance. Therein, the terms "first position" and "second position" are two different positions.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

This embodiment provides a chassis, which can be used in unmanned logistics distribution vehicles, and can be used for logistics, express delivery, and sales in scenarios such as factories, parks, and campuses, and is suitable for short-distance logistics transportation in closed scenarios. It has the characteristics of small and light, and the service object is the public residents. As shown in Figures 1-10, 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.

As shown in FIGS. 3-5 , the vehicle 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, a first mounting seat 111 (as shown in FIG. 3 ) is provided on the front side wall of the electrical compartment 11 , and the first mounting seat 111 is configured to install the front suspension 2 , A second mounting seat 112 (as shown in FIG. 4 ) is disposed on the rear side wall of the electrical compartment 11 , and the second mounting seat 112 is configured to mount the rear suspension 3 . The carrier 12 is connected to the electrical compartment 11 and is configured to carry a carriage. The two anti-collision protection structures 13 are respectively connected to the front and rear ends of the carrier 12 .

In this embodiment, the electrical compartment 11 can be made of steel plates, and steel pipes are reinforced on the side walls, and the bearing frame 12 can be made of steel pipes, which are light in weight and strong in bearing capacity. A pressure sensor may be provided on the anti-collision protection structure 13, and the pressure signal of touching the obstacle is sensed by the pressure sensor, and sent to the controller, so as to control the braking in time.

The electrical compartment 11 is used for accommodating electrical components and can provide environmental guarantee for the safe and stable operation of the electrical components. The first mounting seat 111 is used for installing the front suspension 2 , and the second mounting seat 112 is used for installing the rear suspension 3 . The front and rear suspensions 3 are installed to meet the requirements of higher road conditions, with various functions and a wide range of applications. The carrying frame 12 is connected to the electrical compartment 11 and is used for carrying the carriage, which enhances the carrying capacity of the vehicle frame 1 and has good use durability. The two anti-collision protection structures 13 are respectively connected to the front and rear ends of the carrier frame 12, which improves the safety and stability of operation and can meet the needs of a new generation of logistics and distribution vehicles.

In order to enhance the connection strength of the front suspension 2, optionally, as shown in FIG. In this embodiment, the first mounting seat 111 adopts two lug structures arranged at intervals, and the front suspension 2 can be hinged with the two lug structures through a sleeve.

In order to enhance the connection strength of the rear suspension 3 , optionally, as shown in FIG. 4 , four second mounting seats 112 are provided, and the four second mounting seats 112 are distributed on the electrical compartment 11 along the four vertices of the isosceles trapezoid. on the rear side wall. In this embodiment, the second mounting seat 112 adopts two lug structures arranged at intervals, and the rear suspension 3 can be hingedly connected to the two lug structures through a sleeve. Since the four second mounting seats 112 are distributed along the four vertices of the isosceles trapezoid, the structure bears reasonable force and has good service durability.

In order to facilitate the installation of the stabilizer bar 33 of the rear suspension 3, optionally, a suspension beam 121 is provided at the rear of the carrier frame 12, and a third mounting seat 1211 is provided on the suspension beam 121, and the third mounting seat 1211 is configured to install the rear suspension 3 of the stabilizer bar 33. In this embodiment, the third mounting seat 1211 adopts two lug structures arranged at intervals, and the stabilizer bar 33 of the rear suspension 3 can be hinged with the two lug structures through a sleeve.

For the convenience of arranging the electronic steering system, optionally, the front part of the carrier frame 12 is provided with a mounting plate 122 inclined, and the mounting plate 122 is configured to install the electronic steering system. The mounting plate 122 is provided with a hole for passing the transmission arm of the electronic steering system. In order to facilitate the arrangement of the steering gear 200 , optionally, the frame 1 further includes a steering gear mounting seat 113 . The steering gear mounting seat 113 is arranged at the bottom of the front side wall of the electrical compartment 11 and is configured to install the steering gear of the front suspension 2 . 200 , a mounting slope 1131 is provided on the steering gear mounting seat 113 , and the mounting slope 1131 is disposed facing the mounting plate 122 . The mounting plate 122 and the steering gear mounting seat 113 diversify the applicable functions of the frame 1 and have a wide range of applications.

In order to facilitate the arrangement of the shock absorbers of the front suspension 2 and the rear suspension 3, optionally, a plurality of mounting lugs 123 (as shown in FIG. 5 ) are provided on the carrier frame 12, and the mounting lugs 123 are configured to install the front suspension. Shock absorbers for Suspension 2 and Rear Suspension 3. The applicable functions of the frame 1 are diversified, and the applicable range is wide. In order to facilitate the installation of the vehicle shell, optionally, the front and rear ends of the carrier frame 12 are respectively provided with mounting brackets 124, and the mounting brackets 124 are configured to install the vehicle shell. In order to strengthen the bearing capacity of the carrying frame 12 , optionally, the vehicle frame 1 further includes a reinforcing inclined beam 125 .

As shown in FIGS. 6-8 , 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 with the front wheel hub 100 , the connecting arm 22 is configured to be connected to the vehicle frame 1 and connected to the front axle 21 , and the connecting arm 22 includes a first arm 221 , a first arm 221 , a second arm 22 , which are connected in sequence. The two arms 222 , the third arm 223 and the fourth arm 224 , 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 strong bearing capacity, simple and flexible structure, low cost, and high structural strength. The connection strength between the bridge 21 and the frame 1 ensures the safety of driving, reduces the risk of loss of logistics and distribution, and meets the requirements of a new generation of logistics and distribution vehicles.

In order to strengthen the connection strength between the front axle 21 and the frame 1, optionally, the M-shaped structure includes two first connection ends and three second connection ends, the two first connection ends are located at the front end of the M-shaped structure, and the three The second connection end is located at the rear end of the M-shaped structure, and both the first connection end and the second connection end are configured to be connected to the vehicle frame 1 . By setting two first connection ends and three second connection ends, a total of five connection points enhance the connection strength between the front axle 21 and the frame 1, ensure the driving safety, and reduce the risk of loss of logistics and distribution.

In order to facilitate the arrangement of the front shock absorber 23, optionally, the front ends of the first arm 221 and the fourth arm 224 are provided with downwardly bent extension portions 225, and the free ends of the extension portions 225 are the first connection ends. Optionally, the front suspension 2 further includes a front shock absorber 23, the extension portion 225 is connected to the frame 1 through the front shock absorber 23, one end of the front shock absorber 23 is hinged to the first connection end, and the other end is connected to the frame 1 connection. Specifically, the extension portion 225 is connected to the mounting eye 123 of the vehicle frame 1 through the front shock absorber 23 . Through the shock absorption effect of the front shock absorber 23, the impact force between the front axle 21 and the frame 1 can be effectively buffered, so as to adapt to complex road conditions and reduce the risk of loss of logistics and distribution.

In order to conveniently connect the second connecting end to the frame 1, optionally, a mounting sleeve 226 is connected to the second connecting end, and the frame 1 is provided with a first mounting seat 111, and the first mounting seat 111 includes two ears. The mounting sleeve 226 is sandwiched between the two lugs, and is connected to the two lugs through a shaft pin.

In order to adapt to 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. The first arm 221 and the fourth arm 224 are rotatably connected to the front axle 21 through the guide member 211 in the arc-shaped groove matched with the outer peripheral wall of the front axle 21 . By connecting the guide member 211 and the first arm 221 (or the fourth arm 224 ) through bolts, the guide member 211 can be in the form of arc-shaped grooves on the two side plates of the channel steel.

In order to press the first arm 221 (or the fourth arm 224) on the guide member 211, optionally, the first arm 221 and the fourth arm 224 are also connected to the front axle 21 through U-bolts 227, and the front axle 21 passes through A reinforcing plate 228 is connected to the bent portion of the U-bolt 227 , the first arm 221 and the fourth arm 224 , and the end of the U-bolt 227 is connected to the reinforcing plate 228 . The reinforcing plate (or the fourth arm 224 ) is located on the side facing away from the guide member 211 , and there are two U-shaped bolts 227 located on both sides of the guide member 211 .

In order to facilitate steering, optionally, the front suspension 2 further includes a first link 25 and a second link 26 connected by a ball pair 24 , and the first link 25 is configured to drive the front wheel hub 100 relative to the front axle 21 Rotating to realize steering, the second link 26 is configured to be connected with the output shaft of the steering gear 200 to provide driving force for the first link 25 .

In order to strengthen the structural strength of the connecting arm 22 itself, optionally, the connecting arm 22 further includes two reinforced transverse arms 229 , one of which is fixedly connected to the first arm 221 and the second arm 222 , and the other reinforced transverse arm 229 The third arm 223 and the fourth arm 224 are fixedly connected. Of course, in other embodiments, the first arm 221 , the second arm 222 , the third arm 223 and the fourth arm 224 can also be connected in sequence through and through a whole rigid cross arm 229 .

As shown in FIGS. 9 and 10 , the rear suspension 3 includes a rear axle 31 and a multi-link assembly 32 . Wherein, the end of the rear axle 31 is configured to be connected with the rear wheel hub 300 , and the multi-link assembly 32 includes a first rod 321 , a second rod 322 , a third rod 323 and a fourth rod 324 . One ends of the second rod 322 , the third rod 323 and the fourth rod 324 are all configured to be connected with the vehicle frame 1 , and the first rod 321 , the second rod 322 , the third rod 323 and the fourth rod 324 are connected with the vehicle frame 1 The connection method of the connection sleeve 35 and the shaft pin can be adopted. Specifically, one ends of the first rod 321 , the second rod 322 , the third rod 323 and the fourth rod 324 are all connected with 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 , and the first rod 321 , the second rod 322 , the third rod 323 and the fourth rod 324 are The connection points of the frame 1 are the four vertices of the isosceles trapezoid. The structure is symmetrical, the force is uniform, the bearing capacity is strong, the structure is simple and flexible, the cost is low, and the structural strength is high. The connection strength between the rear axle 31 and the frame 1 is enhanced, the driving safety is ensured, the risk of loss of logistics distribution is reduced, and the requirements of a new generation of logistics distribution vehicles are met.

In order to ensure the best force of the multi-link assembly 32 , optionally, the length of the second rod 322 is 1.5 times the length of the first rod 321 , and the length of the fourth rod 324 is 1.5 times the length of the third rod 323 . . In order to further ensure the optimal force of the multi-link assembly 32, optionally, the axial included angle between the first rod 321 and the third rod 323 and the rear axle 31 is 110°, and the second rod 322 and the fourth rod 324 and The axial included angle of the rear axle 31 is 55°.

To facilitate the installation of the first rod 321 and the second rod 322 , optionally, a fourth mounting seat 311 is provided on the rear axle 31 , and the first rod 321 and the second rod 322 are respectively rotatably mounted on the fourth mounting seat 311 . In this embodiment, the fourth mounting seat 311 is a channel steel, two side plates of the channel steel are provided with a total of four holes, and one end of the first rod 321 or the second rod 322 is rotatably connected to the shaft pin through the connecting sleeve 35 on the fourth mounting seat 311 . The fourth mounting seat 311 can be fixedly connected to the rear axle 31 by bolts, or can be welded to the rear axle 31 .

In order to facilitate the installation of the third rod 323 and the fourth rod 324, optionally, a fifth mounting seat 312 is provided on the rear axle 31, and the fifth mounting seat 312 and the fourth mounting seat 311 are spaced apart. The rods 324 are respectively rotatably mounted on the fourth mounting bases 311 . In this embodiment, the fifth mounting seat 312 is similar in structure to the fourth mounting seat 311 .

To improve the stability of the rear axle 31 , optionally, the rear suspension 3 further includes a stabilizer bar 33 , one end of the stabilizer bar 33 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 the stabilizer bar 33 is connected to the third mounting seat 1211 of the suspension beam 121 of the vehicle frame 1 . To facilitate the installation of the stabilizer bar 33 , optionally, a sixth mounting seat 313 is vertically disposed on the rear axle 31 , and one end of the stabilizer bar 33 is rotatably mounted on the sixth mounting seat 313 . The sixth mounting seat 313 can be fixedly connected to the rear axle 31 by bolts, or can be welded to the rear axle 31 .

In order to improve the shock absorption performance, optionally, the rear suspension 3 further includes two rear shock absorbers 34 arranged at intervals, one end of the rear shock absorbers 34 is connected to the rear axle 31 , and the other end is configured to be connected to the frame 1 . . Specifically, the other end of the rear shock absorber 34 is connected to the mounting eye 123 of the vehicle frame 1 . To facilitate the installation of the rear shock absorber 34 , optionally, a seventh mounting seat 314 is provided on the rear axle 31 , and one end of the rear shock absorber 34 is rotatably mounted on the seventh mounting seat 314 .

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 frame 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 the electrical components. The front side wall of the electrical compartment 11 A first mounting seat 111 is provided thereon, the first mounting seat 111 is used for installing 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 for installing the rear suspension 3 , Front and rear suspensions 3 can be installed to meet the requirements of higher road conditions, with various functions and a wide range of applications. The carrying frame 12 is connected to the electrical compartment 11 and is used for carrying the carriage, which enhances the carrying capacity of the vehicle frame 1 and has good use durability. The two anti-collision protection structures 13 are respectively connected to the front and rear ends of the carrier frame 12, which improves the safety and stability of operation.

The front suspension 2 includes a front axle 21 and a connecting arm 22. The end of the front axle 21 is used for hinged connection with the front wheel hub 100. The connecting arm 22 is used for connecting with the frame 1 and connected with the front axle 21. The connecting arm 22 includes The first arm 221 , the second arm 222 , the third arm 223 and the 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, which is similar to the current Compared with the double swing arm structure or the leaf spring structure in the prior art, the M-shaped structure has strong bearing capacity, simple and flexible structure, low cost, and high structural strength. The connection strength with the frame 1 ensures driving safety, reduces the risk of loss of logistics and distribution, and meets the requirements of a new generation of logistics and distribution vehicles.

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 with the rear wheel hub 300. The multi-link assembly 32 includes a first rod 321, a second rod 322, and a third rod 323. and the 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 connect with the frame 1, and the other ends are all rotatably connected to the rear axle 31. The first rod 321 The connection points of the second rod 322, the third rod 323 and the fourth rod 324 and the frame 1 are the four vertices of the isosceles trapezoid, the structure is symmetrical, the force is uniform, the bearing capacity is strong, the structure is simple and flexible, the cost is low, and the structure High strength, 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 loss of logistics and distribution, and meets the requirements of a new generation of logistics and distribution vehicles.

This embodiment also provides a logistics distribution vehicle, including the above-mentioned chassis, which has strong bearing capacity, simple and flexible structure, low cost, and high structural strength, ensures driving safety, reduces the risk of loss of logistics distribution, and meets the requirements of a new generation of logistics distribution vehicles. Require.

Note that the above are only preferred embodiments of the present invention and applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope 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 can also include more other equivalent embodiments without departing from the concept of the present invention. The scope is determined by the scope of the appended claims.

Claims (10)

1. A chassis is characterized by comprising a frame (1) and a front suspension (2), wherein the front suspension (2) comprises a front axle (21) and a connecting arm (22), the connecting arm (22) is connected with the frame (1) and is connected with the front axle (21), the connecting arm (22) comprises a first arm (221), a second arm (222), a third arm (223) and a fourth arm (224) which are sequentially connected, and the first arm (221), the second arm (222), the third arm (223) and the fourth arm (224) jointly form an M-shaped structure.

2. The chassis according to claim 1, wherein the M-shaped structure comprises two first connection ends and three second connection ends, the two first connection ends being located at a front end of the M-shaped structure and the three second connection ends being located at a rear end of the M-shaped structure, the first connection ends and the second connection ends being connected to the frame (1).

3. The chassis of claim 2, characterized in that the frame (1) comprises an electrical cabinet (11), a first mounting seat (111) is arranged on a front side wall of the electrical cabinet (11), and the second connecting end is connected with the first mounting seat (111).

4. The chassis of claim 3, wherein a mounting sleeve (226) is connected to the second connecting end, the first mounting seat (111) comprises two lug plates, and the mounting sleeve (226) is sandwiched between the two lug plates and is connected to the two lug plates through a shaft pin.

5. The chassis according to claim 2, wherein the front ends of the first arm (221) and the fourth arm (224) are provided with downward bent extension portions (225), the free ends of the extension portions (225) are the first connection ends, the front suspension (2) further comprises front shock absorbers (23), the extension portions (225) are connected with the frame (1) through the front shock absorbers (23), one ends of the front shock absorbers (23) are hinged with the first connection ends, and the other ends of the front shock absorbers are connected with the frame (1).

6. Chassis according to any of claims 1 to 5, characterized in that it further comprises a rear suspension (3), said rear suspension (3) comprising a rear axle (31) and a multi-link assembly (32), said multi-link assembly (32) comprising a first rod (321), a second rod (322), a third rod (323) and a fourth rod (324), said first rod (321), said second rod (322), said third rod (323) and said fourth rod (324) being connected at one end to a frame (1) and at the other end to said rear axle (31) in a rotating manner, the connection points of said first rod (321), said second rod (322), said third rod (323) and said fourth rod (324) to said frame (1) being the four vertices of an isosceles trapezoid.

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

8. Chassis according to claim 6, characterized in that the rear suspension (3) further comprises a stabilizer bar (33), the stabilizer bar (33) being connected at one end with the rear axle (31) and at the other end configured to be connected with the frame (1).

9. Chassis according to claim 8, characterized in that the frame (1) comprises a carrier (12), the rear part of the carrier (12) being provided with a suspension beam (121), the suspension beam (121) being provided with a third mounting (1211), the third mounting (1211) being configured to mount a stabilizer bar (33) of the rear suspension (3).

10. A logistics distribution vehicle comprising a chassis according to any one of claims 1 to 9.

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