CN210618073U

CN210618073U - Vehicle and rear protective structure thereof

Info

Publication number: CN210618073U
Application number: CN201921059056.9U
Authority: CN
Inventors: 蒋杰; 陈鹏; 韩冰
Original assignee: Beijing Foton Daimler Automobile Co Ltd
Current assignee: Beijing Foton Daimler Automobile Co Ltd
Priority date: 2019-07-08
Filing date: 2019-07-08
Publication date: 2020-05-26
Anticipated expiration: 2029-07-08

Abstract

The utility model discloses a vehicle and its back protective structure, the back protective structure of vehicle includes: a left support and a right support adapted to be mounted at a rear of a frame of the vehicle; the rear guard rail is respectively connected with the left support and the right support; the left rear positioning block is arranged on the left support and is abutted against the rear surface of the frame, and the right rear positioning block is arranged on the right support and is abutted against the rear surface of the frame; and/or a left lower positioning block and a right lower positioning block, wherein the left lower positioning block is arranged on the left support and is abutted against the lower surface of the frame, and the right lower positioning block is arranged on the right support and is abutted against the lower surface of the frame. According to the utility model discloses back protective structure of vehicle has advantages such as joint strength is high, occupation space is little.

Description

Vehicle and rear protective structure thereof

Technical Field

The utility model relates to a vehicle technical field particularly, relates to a rear protection structure of vehicle and has the rear protection structure's of vehicle.

Background

According to the requirements of national relevant regulations, vehicles of the types N2, N3, O3 and O4 must be provided with a rear protection structure at the rear part of a vehicle frame, so as to provide safe and effective protection when the rear part of the vehicle is touched or squeezed.

The rear protective structure of the vehicle in the related art is generally connected with the tail of the vehicle frame only by bolts, so that the connection strength of the rear protective structure and the vehicle frame is insufficient, when the rear protective structure of the vehicle is collided or extruded, the connecting bolts are easily broken under stress, and due to the limitation of the space of the tail of the vehicle frame, the scheme of improving the connection strength by increasing the number of the bolts is difficult to realize.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art to at least a certain extent. Therefore, an object of the utility model is to provide a rear protection structure of vehicle, this rear protection structure of vehicle have joint strength height, occupation space advantage such as little.

The utility model discloses still provide a vehicle of back protective structure who has above-mentioned vehicle.

To achieve the above object, according to an embodiment of the first aspect of the present invention, a rear protection structure of a vehicle is provided, where the rear protection structure of the vehicle includes: a left support and a right support adapted to be mounted at a rear of a frame of the vehicle; the rear guard rail is respectively connected with the left support and the right support; the left rear positioning block is arranged on the left support and is abutted against the rear surface of the frame, and the right rear positioning block is arranged on the right support and is abutted against the rear surface of the frame; and/or a left lower positioning block and a right lower positioning block, wherein the left lower positioning block is arranged on the left support and is abutted against the lower surface of the frame, and the right lower positioning block is arranged on the right support and is abutted against the lower surface of the frame.

According to the utility model discloses back protective structure of vehicle has advantages such as joint strength is high, occupation space is little.

In addition, according to the utility model discloses rear protection architecture of vehicle can also have following additional technical characterstic:

according to some embodiments of the present invention, the left brace is mounted to the rear portion of the frame by a plurality of left connecting bolts, and the right brace is mounted to the rear portion of the frame by a plurality of right connecting bolts; when the space at the tail part of the frame allows the number of the left connecting bolts and the number of the right connecting bolts to be not less than 6, the left support is only provided with the left rear positioning block, and the right support is only provided with the right rear positioning block.

Furthermore, the left support is mounted at the tail part of the frame through a plurality of left connecting bolts, and the right support is mounted at the tail part of the frame through a plurality of right connecting bolts; when the space of the tail of the frame limits that the number of the left connecting bolts and the number of the right connecting bolts are smaller than 6, the left support is simultaneously provided with the left rear positioning block, the left lower positioning block and the right support is simultaneously provided with the right rear positioning block and the right lower positioning block.

According to some embodiments of the present invention, the left support is provided with the left rear positioning block and the left lower positioning block at the same time, and the left rear positioning block and the left lower positioning block are connected into a whole to form a left L-shaped positioning plate; the right support is simultaneously provided with the right rear positioning block and the right lower positioning block, and the right rear positioning block and the right lower positioning block are connected into a whole to form a right L-shaped positioning plate.

According to some embodiments of the present invention, the left rear positioning block and the left lower positioning block are rectangular blocks and welded to the left support; the right rear positioning block and the right lower positioning block are both rectangular blocks and are welded to the right support.

According to some embodiments of the utility model, the left side support with the right side supports respectively roll extrusion integrated into one piece, and thickness is 3mm ~ 7mm respectively.

According to some specific examples of the present invention, the left support is mounted on a left side surface of the tail portion of the frame and extends rearward with respect to the up-down direction, and the left rear positioning block and the left lower positioning block are adapted to be disposed on a right side surface of the left support; the right support is installed on the right side face of the tail portion of the frame and extends in a backward inclining mode relative to the vertical direction, and the right rear positioning block and the right lower positioning block are suitable for being arranged on the left side face of the right support.

Further, the left support is provided with a left upper flanging and a left lower flanging which extend towards the left; the right support structure is provided with a right upper flange and a right lower flange which extend rightwards. Further, the left upper flange comprises an upper left horizontal section, an upper left circular arc section and an upper left inclined section which are sequentially connected from front to back; the left lower flanging comprises a left lower inclined section, a left lower arc section and a left lower horizontal section which are sequentially connected from front to back; the right upper flanging comprises a right upper horizontal section, a right upper arc section and a right upper inclined section which are sequentially connected from front to back; the right lower flanging comprises a right lower inclined section, a right lower arc section and a right lower horizontal section which are sequentially connected from front to back.

Further, the front edge of the left support extends along the up-down direction, and the rear edge of the left support is provided with a left notch for connecting the rear protective guard; the front edge of the right support extends along the up-and-down direction, and the rear edge of the right support is provided with a right notch used for connecting the rear protective guard.

Furthermore, a left reinforcing plate and a right reinforcing plate are connected to the rear protective guard; the cross section of the left reinforcing plate is U-shaped and covers the upper surface, the front surface and the lower surface of the guard rail, the upper surface of the left reinforcing plate is connected with the upper wall of the left notch in a matched mode, and the front surface of the left reinforcing plate is connected with the front wall of the left notch in a matched mode; the cross section of the right reinforcing plate is U-shaped and covers the upper surface, the front surface and the lower surface of the guard rail, the upper surface of the right reinforcing plate is connected with the upper wall of the right notch in a matched mode, and the front surface of the right reinforcing plate is connected with the front wall of the right notch in a matched mode.

Further, the left reinforcing plate is welded on the upper surface, the front surface and the lower surface of the guard rail, the upper surface of the left reinforcing plate is connected with the upper wall of the left notch in a welding mode, and the front surface of the left reinforcing plate is connected with the front wall of the left notch in a welding mode; the right reinforcing plate is welded on the upper surface, the front surface and the lower surface of the protective guard, the upper surface of the right reinforcing plate is connected with the upper wall of the right notch in a welding mode, and the front surface of the right reinforcing plate is connected with the front wall of the right notch in a welding mode.

According to the utility model discloses an embodiment of second aspect provides a vehicle, according to the utility model discloses a vehicle include the frame and according to the embodiment of the first aspect rear protective structure of vehicle.

According to the utility model discloses vehicle, through utilizing according to the utility model discloses an embodiment of first aspect the back protective structure of vehicle, have advantages such as afterbody protection safe and reliable.

Drawings

The above advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic partial structure diagram of a vehicle according to an embodiment of the present invention.

Fig. 2 is a rear view of a rear fender structure of a vehicle mounted on a vehicle frame according to an embodiment of the invention.

Fig. 3 is a top view of a rear fender structure of a vehicle according to an embodiment of the invention.

Fig. 4 is a left side view of a rear fender structure of a vehicle mounted on a vehicle frame according to an embodiment of the invention.

Fig. 5 is a left side view of a rear fender structure of a vehicle mounted to a frame in accordance with another embodiment of the present invention.

Fig. 6 is a schematic structural view of a left reinforcement plate of a rear protective structure of a vehicle according to an embodiment of the present invention.

Fig. 7 is a left side view of a left support of a rear fender structure of a vehicle according to an embodiment of the invention.

Fig. 8 is a schematic structural view of a left support of a rear fender structure of a vehicle according to an embodiment of the present invention.

Reference numerals:

a rear fender structure 10, a frame 20,

A left support 100, a left connecting bolt 110, a left upper flange 120, a left upper horizontal section 121, a left upper circular arc section 122, a left upper inclined section 123, a left lower flange 130, a left lower horizontal section 131, a left lower circular arc section 132, a left lower inclined section 133, a left gap 140, a left upper connecting bolt, a left lower flange 120, a left upper horizontal section 121, a left upper circular arc section 122, a left upper inclined section,

A right support 200, a right connecting bolt 210,

A rear protective guard 300,

A left rear positioning block 400,

A right rear positioning block 500,

A left lower positioning block 600, a left L-shaped positioning plate 610,

A right lower positioning block 700,

A left reinforcing plate 800,

And a right reinforcing plate 900.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more, and "a plurality" means one or more.

A rear protective structure 10 of a vehicle according to an embodiment of the present invention is described below with reference to the drawings.

As shown in fig. 1 to 8, the rear guard structure 10 of the vehicle according to the embodiment of the present invention includes a left support 100, a right support 200, a rear guard rail 300, (a left rear positioning block 400 and a right rear positioning block 500), and/or (a left lower positioning block 600 and a right lower positioning block 700).

The left and

right supports

100 and 200 are adapted to be mounted at the rear of the frame 20, and the rear guard rail 300 is connected to the left and

right supports

100 and 200, respectively. For example, upper ends of the left and

right supports

100 and 200 are installed at the rear of the frame 20, the left and

right supports

100 and 200 may be spaced apart in the left-right direction, the left support 100 is located at the left side of the right support 200, the right support 200 is located at the right side of the left support 100, and the rear guard rail 300 extends in the left-right direction and is connected to lower ends of the left and

right supports

100 and 200.

It should be understood by those skilled in the art that, for four positioning blocks, namely, the left rear positioning block 400, the right rear positioning block 500, the left lower positioning block 600 and the right lower positioning block 700, several or all of the positioning blocks may be selected for combination in various embodiments of the present invention, specifically, the rear protective structure 10 of the vehicle may only adopt the left rear positioning block 400 and the right rear positioning block 500, may only adopt the left lower positioning block 600 and the right lower positioning block 700, and may also adopt the left rear positioning block 400, the right rear positioning block 500, the left lower positioning block 600 and the right lower positioning block 700 at the same time.

The left rear positioning block 400 is disposed on the left support 100 and forward abuts against the rear surface of the frame 20, and the right rear positioning block 500 is disposed on the right support 200 and forward abuts against the rear surface of the frame 20.

The left lower positioning block 600 is disposed on the left support 100 and upwardly abuts against the lower surface of the frame 20, and the right lower positioning block 700 is disposed on the right support 200 and upwardly abuts against the lower surface of the frame 20.

According to the utility model discloses back protective structure 10 of vehicle, through setting up (locating piece 600 and locating piece 700 under locating piece 600 and the right side behind locating piece 400 and the right side behind the left side) and/or (locating piece 700 under locating piece 600 and the right side behind the left side), can improve the back protective structure 10 of vehicle and frame 20's joint strength, when collision or extrusion, effectively improve the stress of the back protective structure 10 of vehicle and frame 20's connecting piece (like the bolt), avoid the connecting piece fracture, thereby improve the fail safe nature of back protection, and need not to increase the quantity of connecting piece, the setting occupation space of locating piece is less, not only simple structure, and is with low costs, and be suitable for the afterbody space of frame 20, easily realize.

Specifically, when the left rear positioning block 400 and the right rear positioning block 500 are adopted, the left support 100 and the right support 200 can be prevented from moving forward relative to the frame 20 by stopping the frame 20 forward by the left rear positioning block 400 and the right rear positioning block 500, and a part of the stress of the connection of the left support 100 and the right support 200 with the frame 20 is shared by the left rear positioning block 400 and the right rear positioning block 500, so that the stress of the connection parts (such as bolts) of the left support 100 and the right support 200 with the frame 20 is reduced, and the connection parts are prevented from being damaged.

When the left lower positioning block 600 and the right lower positioning block 700 are adopted, the left lower positioning block 600 and the right lower positioning block 700 can be utilized to stop the frame 20 upwards, so that the left support 100 and the right support 200 are prevented from moving upwards relative to the frame 20, and part of the stress of the connection between the left support 100 and the frame 20 and the right support 200 is shared by the left rear positioning block 400 and the right rear positioning block 500, so that the stress of the connecting parts (such as bolts) of the left support 100 and the right support 200 and the frame 20 is reduced, and the damage of the connecting parts is avoided.

Of course, when the left rear positioning block 400, the right rear positioning block 500, the left lower positioning block 600 and the right lower positioning block 700 are simultaneously employed, the above effects can be simultaneously achieved accordingly.

Therefore, according to the utility model discloses rear protection structure 10 of vehicle has advantages such as joint strength is high, occupation space is little.

In some embodiments of the present invention, the left brace 100 is mounted to the rear portion of the frame 20 by a plurality of left connecting bolts 110, and the right brace 200 is mounted to the rear portion of the frame 20 by a plurality of right connecting bolts 210.

Because the afterbody space of the frame 20 of different vehicles is different, to different afterbody spaces, the maximum quantity that left connecting bolt 110 and right connecting bolt 210 allow is also different, in the different embodiments of the utility model, can select left back locating piece 400, right back locating piece 500, left lower locating piece 600 and right lower locating piece 700 to make up according to the quantity of left connecting bolt 110 and right connecting bolt 210.

For example, when the space at the rear of the frame 20 allows the number of the left and right connecting

bolts

110 and 210 to be not less than 6, only the left rear positioning block 400 is disposed on the left support 100 and only the right rear positioning block 500 is disposed on the right support 200. That is, when the space at the rear of the frame 20 is relatively wide and 6 or more left connecting bolts 110 and 6 or more right connecting bolts 210 may be provided, only the left rear positioning block 400 and the right rear positioning block 500 may be used.

For another example, when the space of the rear portion of the frame 20 limits the number of the left and

right connection bolts

110 and 210 to less than 6, the left rear positioning block 400 and the left lower positioning block 600 are simultaneously disposed on the left stay 100 and the right rear positioning block 500 and the right lower positioning block 700 are simultaneously disposed on the right stay 200. That is, when the space of the rear portion of the frame 20 is relatively tight and only the number of the left connecting bolts 110 and the number of the right connecting bolts 210 are 6 or less, the left rear positioning block 400, the right rear positioning block 500, the left lower positioning block 600, and the right lower positioning block 700 may be used at the same time.

In some specific examples of the utility model, as shown in fig. 5, when adopt left back locating piece 400, right back locating piece 500, locating piece 600 and right lower locating piece 700 down in a left side simultaneously, left back locating piece 400 and left lower locating piece 600 can link into an integrated entity in order to constitute left L type locating plate 610, right back locating piece 500 and right lower locating piece 700 can link into an integrated entity in order to constitute right L type locating plate, can further improve the rear protection architecture 10 of vehicle and frame 20's joint strength from this, and can further simplify the production technology.

In some embodiments of the present invention, as shown in fig. 1 and 4, the left rear positioning block 400 is a rectangular block and is welded to the left support 100, and the left rear positioning block 400 is attached to the rear surface of the frame 20 and is not welded to the rear surface of the frame. The lower left positioning block 600 is a rectangular block and is welded to the left support 100, and the lower left positioning block 600 is attached to the lower surface of the frame 20 without being welded thereto. The right rear positioning block 500 is a rectangular block and is welded to the right support 200, and the right rear positioning block 500 is attached to the rear surface of the frame 20 without being welded thereto. The lower right positioning block 700 is a rectangular block and is welded to the left support 200, and the lower right positioning block 700 is attached to the lower surface of the frame 20 without being welded thereto.

From this, through setting left back locating piece 400, right back locating piece 500, left lower locating piece 600, right lower locating piece 700 to the rectangle piece, can match the shape of frame 20, the evenly distributed of atress of being convenient for, and the locating piece all is not welded with frame 20, like this when the collision or extrusion, can have small displacement between locating piece and the frame 20, can cushion collision or extrusion like this, release energy prevents because of the fracture that rigid connection leads to, and the assembly of being convenient for.

Wherein, left branch 100 and right branch 200 symmetry sets up, and left branch 100 and right branch 200 are respectively through roll extrusion integrated into one piece, can effectively reduce the wall thickness of left branch 100 and right branch 200, for example, the thickness of left branch 100 and right branch 200 can be 3 ~ 7mm, and preferred thickness is 5mm to on the basis of guaranteeing high barrier propterty, reduce weight, practice thrift the cost.

Further, the stress performance of the material of the left support 100 and the right support 200 is not lower than that of the 610L material, so that the protection strength is further improved.

In some embodiments of the present invention, as shown in fig. 1 and 4, in order to improve the strength and the protection ability of the left support 100 and the right support 200, the upper end of the left support 100 is installed on the left side surface of the tail portion 20 of the frame and is inclined backward relative to the up-down direction, and the upper end of the right support 200 is installed on the right side surface of the tail portion of the frame 20 and is inclined backward relative to the up-down direction. Namely, the left support 100 and the right support 200 are both inclined from top to bottom.

The left rear positioning block 400 and the left lower positioning block 600 are suitable for being arranged on the right side surface of the left support 100, and the right rear positioning block 500 and the right lower positioning block 700 are suitable for being arranged on the left side surface of the right support 200, so that the tail space of the frame 20 can be fully utilized, and the positioning blocks occupy a small effective space as much as possible.

Those skilled in the art will appreciate that the lengths, heights, etc. of the left support 100 and the right support 200 may be set according to the rear overhang of the entire vehicle, the height of the chassis, etc.

Further, as shown in fig. 7 and 8, the left support 10 is configured with a left upper flange 120 and a left lower flange 130 extending leftward, and the right support 200 is configured with a right upper flange and a right lower flange extending rightward, and the strength of the left support 100 and the right support 200 can be further enhanced by the flange structure of the side edges, so that the left support 100 and the right support 200 are prevented from being deformed.

Specifically, the upper left flange 120 includes an upper left horizontal segment 121, an upper left circular arc segment 122, and an upper left horizontal segment 123, which are sequentially connected from front to back, and the lower left flange 130 includes a lower left inclined segment 133, a lower left circular arc segment 132, and a lower left horizontal segment 131, which are sequentially connected from front to back. Wherein, upper left horizontal segment 121 and lower left horizontal segment 133 all extend along the fore-and-aft direction level, the length of upper left horizontal segment 121 is greater than the length of lower left horizontal segment 131, upper left inclined segment 123 and lower left inclined segment 133 all from top to bottom slope the setting gradually backward gradually, upper left circular arc section 122 connects between upper left horizontal segment 121 and upper left inclined segment 123 and makes both circular arc transition, lower left circular arc section 132 connects between lower left inclined segment 133 and lower left horizontal segment 131 and makes both circular arc transition. Through further designing the concrete structure of turn-ups, can make full use of turn-ups to the additional strengthening of structural strength to further improve the structural strength of left brace 100.

Correspondingly, the upper right flanging comprises an upper right horizontal section, an upper right circular arc section and an upper right inclined section which are sequentially connected from front to back, and the lower right flanging comprises a lower right inclined section, a lower right circular arc section and a lower right horizontal section which are sequentially connected from front to back. Wherein, upper right horizontal segment and lower right horizontal segment all extend along the fore-and-aft direction level, and the length of upper right horizontal segment is greater than the length of lower right horizontal segment, and upper right slope section and lower right slope section all incline the setting backward gradually from top to bottom, and upper right circular arc section is connected between upper right horizontal segment and the upper right slope section and is made both circular arcs transition, and lower right circular arc section is connected between lower right slope section and lower right horizontal segment and is made both circular arcs transition. Through further designing the concrete structure of turn-ups, can make full use of turn-ups to structural strength's additional strengthening to further improve the structural strength who supports 200 on the right side.

It will be understood by those skilled in the art that since the structure of the right support 200 is the same as that of the left support 100, and the two are only symmetrically disposed, the specific structure of the right support 200, the specific form of the cuff, etc., are not illustrated in the drawings, and these structures of the right support 200 can be disposed with reference to the left support 100.

In some embodiments of the present invention, as shown in fig. 1 to 5 and 6, a left reinforcing plate 800 and a right reinforcing plate 900 are connected to the rear guard rail 300, a lower end of the left support 100 is welded to the left reinforcing plate 800 to connect the rear guard rail 300 through the left reinforcing plate 800, and a lower end of the right support 200 is welded to the right reinforcing plate 900 to connect the rear guard rail 300 through the right reinforcing plate 900.

Specifically, for the connection structure of the left reinforcement plate 800 and the right reinforcement plate 900 with the rear guard rail 300, the cross section of the left reinforcement plate 800 is U-shaped with a backward opening, and the left reinforcement plate 800 covers the upper surface, the front surface, and the lower surface of the rear guard rail 300 and is fixed by welding. The right reinforcing plate 900 has a U-shaped cross section with a rearward opening, and the right reinforcing plate 900 covers the upper surface, the front surface, and the lower surface of the rear guard rail 300 and is fixed by welding.

For the connection structure of the left support 100 and the left reinforcing plate 800 and the connection structure of the right support 200 and the right reinforcing plate 900, the front edge of the left support 100 extends in the up-down direction, and the rear edge of the left support 100 is configured with a left notch 140. The front edge of the right support 200 extends along the up-down direction, and the rear edge of the right support 200 is configured with a right notch. The left notch 140 is a right-angled notch and has an upper wall and a front wall perpendicular to each other, the upper surface of the left reinforcing plate 800 is connected with the upper wall of the left notch 140 in a matching manner, and the front surface of the left reinforcing plate 800 is connected with the front wall of the left notch 140 in a matching manner. The right notch is a right-angled notch and has an upper wall and a front wall (specifically, refer to the structure of the left notch 140) perpendicular to each other, the upper surface of the right reinforcing plate 900 is connected with the upper wall of the right notch in a matching manner, and the front surface of the right reinforcing plate 900 is connected with the front wall of the right notch in a matching manner.

In the rear protective structure of the vehicle in the related art, the left support and the right support are welded on the rear protective guard, the welding part is easy to crack, and the deformation of the rear protective guard is large. The utility model discloses an in the embodiment, through setting up left reinforcing plate 800 and right reinforcing plate 900, can avoid the junction fracture to prevent that rear protective guard 300 from warping, thereby further improve the proof strength.

A vehicle according to an embodiment of the present invention, which may be a truck, is described below with reference to the accompanying drawings.

According to the utility model discloses vehicle includes frame 20 and according to the utility model discloses the back protective structure 10 of vehicle of above-mentioned embodiment.

According to the utility model discloses vehicle, through utilizing according to the utility model discloses the back protective structure 10 of vehicle of above-mentioned embodiment has advantages such as afterbody protection safe and reliable.

Other configurations and operations of vehicles according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description herein, references to the description of the terms "particular embodiment," "particular example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A rear protective structure for a vehicle, comprising:

a left support and a right support adapted to be mounted at a rear of a frame of the vehicle;

the rear guard rail is respectively connected with the left support and the right support;

the left rear positioning block is arranged on the left support and is abutted against the rear surface of the frame, and the right rear positioning block is arranged on the right support and is abutted against the rear surface of the frame; and/or

The left lower positioning block is arranged on the left support and is abutted to the lower surface of the frame, and the right lower positioning block is arranged on the right support and is abutted to the lower surface of the frame.

2. The rear protective structure of a vehicle according to claim 1, wherein the left brace is mounted to the rear portion of the frame by a plurality of left connecting bolts, and the right brace is mounted to the rear portion of the frame by a plurality of right connecting bolts;

when the space at the tail part of the frame allows the number of the left connecting bolts and the number of the right connecting bolts to be not less than 6, the left support is only provided with the left rear positioning block, and the right support is only provided with the right rear positioning block.

3. The rear protective structure of a vehicle according to claim 1, wherein the left brace is mounted to the rear portion of the frame by a plurality of left connecting bolts, and the right brace is mounted to the rear portion of the frame by a plurality of right connecting bolts;

when the space of the tail of the frame limits that the number of the left connecting bolts and the number of the right connecting bolts are smaller than 6, the left support is simultaneously provided with the left rear positioning block, the left lower positioning block and the right support is simultaneously provided with the right rear positioning block and the right lower positioning block.

4. The rear protective structure of a vehicle according to claim 1, wherein the left rear positioning block and the left lower positioning block are simultaneously arranged on the left support, and the left rear positioning block and the left lower positioning block are integrally connected to form a left L-shaped positioning plate;

the right support is simultaneously provided with the right rear positioning block and the right lower positioning block, and the right rear positioning block and the right lower positioning block are connected into a whole to form a right L-shaped positioning plate.

5. The rear protective structure of a vehicle according to claim 1, wherein the left rear locating block and the left lower locating block are both rectangular blocks and are welded to the left support;

the right rear positioning block and the right lower positioning block are both rectangular blocks and are welded to the right support.

6. The rear protective structure for vehicle according to claim 1, wherein said left support and said right support are respectively integrally formed by rolling and have a thickness of 3mm to 7 mm.

7. The rear guard structure for vehicle according to any one of claims 1 to 6, wherein said left support is mounted to a left side surface of a rear portion of said frame and extends rearward with respect to an up-down direction, and said left rear positioning block and said left lower positioning block are adapted to be disposed on a right side surface of said left support;

the right support is installed on the right side face of the tail portion of the frame and extends in a backward inclining mode relative to the vertical direction, and the right rear positioning block and the right lower positioning block are suitable for being arranged on the left side face of the right support.

8. The rear protective structure of a vehicle according to claim 7, wherein the left support structure is configured with a left upper flange and a left lower flange extending leftward;

the right support structure is provided with a right upper flange and a right lower flange which extend rightwards.

9. The rear protective structure of a vehicle according to claim 8, wherein the upper left flange includes an upper left horizontal section, an upper left circular arc section, and an upper left inclined section which are connected in sequence from front to rear;

the left lower flanging comprises a left lower inclined section, a left lower arc section and a left lower horizontal section which are sequentially connected from front to back;

the right upper flanging comprises a right upper horizontal section, a right upper arc section and a right upper inclined section which are sequentially connected from front to back;

the right lower flanging comprises a right lower inclined section, a right lower arc section and a right lower horizontal section which are sequentially connected from front to back.

10. The rear guard structure of the vehicle as claimed in claim 7, wherein a front side edge of the left support extends in an up-down direction, and a rear side edge of the left support is configured with a left notch for connecting the rear guard rail;

the front edge of the right support extends along the up-and-down direction, and the rear edge of the right support is provided with a right notch used for connecting the rear protective guard.

11. The rear guard structure of the vehicle according to claim 10, wherein a left reinforcement plate and a right reinforcement plate are connected to the rear guard rail;

the cross section of the left reinforcing plate is U-shaped and covers the upper surface, the front surface and the lower surface of the guard rail, the upper surface of the left reinforcing plate is connected with the upper wall of the left notch in a matched mode, and the front surface of the left reinforcing plate is connected with the front wall of the left notch in a matched mode;

the cross section of the right reinforcing plate is U-shaped and covers the upper surface, the front surface and the lower surface of the guard rail, the upper surface of the right reinforcing plate is connected with the upper wall of the right notch in a matched mode, and the front surface of the right reinforcing plate is connected with the front wall of the right notch in a matched mode.

12. The rear guard structure of the vehicle as claimed in claim 11, wherein the left reinforcement plate is welded to upper, front and lower surfaces of the guard rail, the upper surface of the left reinforcement plate is welded to the upper wall of the left notch, and the front surface of the left reinforcement plate is welded to the front wall of the left notch;

the right reinforcing plate is welded on the upper surface, the front surface and the lower surface of the protective guard, the upper surface of the right reinforcing plate is connected with the upper wall of the right notch in a welding mode, and the front surface of the right reinforcing plate is connected with the front wall of the right notch in a welding mode.

13. A vehicle, characterized by comprising:

a frame;

the rear protective structure of a vehicle according to any one of claims 1 to 12.