CN217598504U - Rear protection device of semitrailer - Google Patents

Abstract

A rear protection device of a semitrailer comprises a rear connecting longitudinal beam, a bumper panel, an inclined support plate and a lower cross beam, wherein the rear connecting longitudinal beam is used for being connected with a crossbeam at the rear lower end of the semitrailer; the inclined supporting plate is provided with a lower cross beam relative to the tail end of the rear connecting longitudinal beam, and the lower cross beam is connected with the inclined supporting plate through bolts. The utility model discloses a back protector makes the bearing diagonal board be connected with the back simultaneously and adopts the welded mode to be connected between the longeron through the bearing diagonal board of chooseing for use high strength steel, and this has guaranteed the bearing diagonal board and has connected the crashproof intensity of longeron with the back, is destroyed when effectively placing the emergence accident. The lower cross beam is connected with the inclined support plate through the bolt, so that the connection strength of the lower cross beam is ensured, and the lower cross beam is easy to replace after being damaged by impact without replacing the inclined support plate.

Description

Rear protection device of semitrailer

Technical Field

The utility model relates to a protector technical field, concretely relates to back protector of semitrailer.

Background

At present, the back protector intensity of the installation of a lot of hazardous articles semitrailer haulage vehicles in market is not enough, hardly play the guard action to the rear vehicle when taking place the incident of knocking into the back, the rear vehicle can be washed into the afterbody below of the place ahead vehicle, cause the injures and deaths of rear driver and crew, still can cause the damage to the jar body or afterbody discharge valve and the pipeline of hazardous articles vehicle in addition, lead to the hazardous articles to leak or even explode on fire, to peripheral vehicle, personnel, road and environment cause huge destruction.

The disclosure number is "CN1265359A", the chinese invention entitled rear protection device for rear-end collision prevention for trucks discloses: the protection device is composed of two cantilever beams, a frame, two fixed seats and two extension springs. The cantilever beam is a backward bending arched beam which is formed by connecting an upper section, a middle section and a lower section into a whole. The fixing seat is provided with a bottom plate and two lugs, the upper section of the cantilever beam is inserted between the two lugs of the fixing seat and is pivoted with the horizontal pin shaft, and the top of the end head of the upper section of the cantilever beam is abutted against the bottom plate of the fixing seat. Extension spring's one end is connected in the lug outside of fixing base, and the corresponding outside at the cantilever beam middle section is connected to the other end, prevents that the cantilever beam from making a round trip to rock in the car driving in-process production, also enables the car simultaneously and meets behind the barrier, and the cantilever beam lifts up the back, automatic recovery stable state. When the car collides with the frame at the tail part of the truck, the impact energy is sequentially absorbed by the deformation of the frame and the bending deformation of the cantilever beam, so that the impact force of the car is gradually reduced, and the car is prevented from drilling into the tail part of the truck. The protective device is poor in strength because the cantilever beam is pivoted with the fixed seat through the connecting lug and the pin shaft, and when the protective device is subjected to large impact force, the connecting position of the cantilever beam and the fixed seat is extremely easy to damage, so that the protective effect is poor. In addition, when the cantilever beam is impacted, the lower section of the cantilever beam is directly impacted, the position is very easy to be damaged, and the upper section, the middle section and the lower section of the cantilever beam are integrated, so that the whole cantilever beam needs to be replaced during replacement. The process of replacing the whole cantilever beam is more complicated, and the cost is higher. In addition, the product is easy to shake during use and is unstable.

SUMMERY OF THE UTILITY MODEL

For solving the problem that current protector uses unstability, takes place to destroy, replacement cost is high easily among the background art, the utility model provides a back protector of semitrailer.

In order to achieve the above object, the technical solution of the present invention is as follows.

A rear protection device of a semitrailer comprises a rear connecting longitudinal beam, a bumper panel, an inclined support plate and a lower cross beam, wherein the rear connecting longitudinal beam is used for being connected with a crossbeam at the rear lower end of the semitrailer; the inclined supporting plate is provided with a lower cross beam relative to the tail end of the rear connecting longitudinal beam, and the lower cross beam is connected with the inclined supporting plate through bolts.

Furthermore, the rear connecting longitudinal beam is I-shaped and provided with a first cavity and a second cavity which face to the side face and are opposite in position; the first cavity is internally provided with a first connecting piece, the second cavity is internally provided with a second connecting piece, and the first connecting piece and the second connecting piece are both used for connecting the rear connecting longitudinal beam and the bumper panel.

Furthermore, a supporting plate for connecting a bumper panel is welded on the first connecting piece.

Furthermore, the second connecting piece is provided with a third connecting end face and a fourth connecting end face, the third connecting end face is connected with the bottom face of the second cavity, and the fourth connecting end face is connected with the bumper face plate.

Further, the sidewall of the second connector abuts the inner wall of the second cavity.

Furthermore, the fourth connecting end face and the end face, close to the bumper face, of the rear connecting longitudinal beam are located on the same plane.

Further, the material aluminium alloy of bumper panel.

Furthermore, two ends of the bumper panel are provided with rubber sleeves.

Compared with the prior art, the beneficial effects of the utility model are that: in the accident that takes place to knock into the back, the skew supporting plate of protection device, skew supporting plate and the hookup location of back connection longeron are very easily taken place to destroy, and through the skew supporting plate who chooses high strength steel for use, make simultaneously and adopt welded mode to be connected between skew supporting plate and the back connection longeron, this guaranteed the skew supporting plate and with and the crashproof intensity of back connection longeron, can effectively place and be destroyed when taking place the accident. In addition, in the rear-end collision accident, the rear vehicle directly impacts the lower cross beam, the lower cross beam is extremely easy to damage, the lower cross beam is connected with the inclined supporting plate through the bolt, the connection strength of the lower cross beam is guaranteed, and the lower cross beam is easy to replace after being damaged by the impact without replacing the inclined supporting plate.

Drawings

FIG. 1 is a front view of a rear guard;

FIG. 2 is a top view of the rear guard;

FIG. 3 is a left side view of the rear guard;

FIG. 4 is a front view of the rear guard (without the bumper fascia, lower beam, etc.);

FIG. 5 is a top view of the rear guard of FIG. 4;

6a-b are front and top views, respectively, of a first link;

FIGS. 7a-c are three views of a second connector;

FIG. 8 isbase:Sub>A cross-sectional view of section A-A of FIG. 5;

the rear connecting longitudinal beam 1; a first chamber 11; a second chamber 12;

a bumper face plate 2; a rubber sleeve 21; an identification plate 22; company brand 23; a dangerous brand 24; a tail light 25;

an inclined support plate 3;

a lower cross beam 4;

a first connecting member 5; a first connection end face 51; a second connection end face 52; a stop block 53;

a second connecting member 6; a third connecting end face 61; a fourth connection end surface 62;

a support plate 7;

a reinforcing cross member 8;

a license plate holder 9; a license plate 91;

a reflector bracket 10;

Detailed Description

In the description of the present invention, it is to be understood that the terms "inside", "outside", 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 referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

The technical solution of the present invention will be further explained with reference to fig. 1-8.

A rear protection device of a semitrailer is shown in figures 1-3 and comprises two rear connecting longitudinal beams 1, a bumper panel 2, an inclined support plate 3 and a lower cross beam 4, wherein the rear connecting longitudinal beams 1 are used for being connected with a girder at the rear lower end of the semitrailer, the bumper panel 2 is connected with the rear connecting longitudinal beams 1, the inclined support plate 3 is made of high-strength steel and welded to the bottom surface of the rear connecting longitudinal beams 1 and is arranged obliquely towards the rear lower part; the inclined supporting plate 3 is provided with a lower cross beam 4 relative to the tail end of the rear connecting longitudinal beam 1, and the lower cross beam 4 is connected with the inclined supporting plate 3 through bolts. In the accident that takes place to chase after, the skew supporting plate 3 of protection device, skew supporting plate 3 and the hookup location of back connection longeron 1 very easily take place to destroy, through the skew supporting plate 3 of chooseing for use the high strength steel, make simultaneously between skew supporting plate 3 and the back connection longeron 1 adopt the welded mode to be connected, this guaranteed skew supporting plate 3 and with the crashproof strength of back connection longeron 1, can effectively place when taking place the accident and destroyed. In addition, in the rear-end collision accident, the rear vehicle directly impacts the lower cross beam 4, the lower cross beam 4 is extremely easy to damage, the lower cross beam 4 is connected with the inclined support plates 3 through bolts, the connection strength is guaranteed, the inclined support plates 3 are easy to replace after being damaged by impact, and the maintenance efficiency is improved.

Preferably, the material of the bumper fascia 2, aluminum profiles, described above, ensures impact strength and also reduces weight considerably over structures using steel. The both ends of bumper panel 2 are equipped with gum cover 21, and this can prevent that personnel from colliding with the injury. The lower beam 4 is a rectangular tube made of carbon steel, has good strength and impact resistance, and is sealed at two ends to prevent water from entering.

As shown in fig. 4 to 8, the rear connecting longitudinal beam 1 is i-shaped, and is provided with a first cavity 11 and a second cavity 12 which face to the side and are opposite to each other; a first connecting piece 5 is arranged in the first cavity 11, and a second connecting piece 6 is arranged in the second cavity 12. The first connecting piece 5 is provided with a first connecting end surface 51 and a second connecting end surface 52 which are perpendicular to each other; the first connecting end surface 51 is arranged at the bottom of the first cavity 11 and is connected with the first cavity by bolts, and the second connecting end surface 52 is abutted against the inner wall of the first cavity. The first connecting end face 51 and the second connecting end face 52 are welded with the limiting blocks 53 on the side faces close to the rear, and the bumper panel 2 is limited by the limiting blocks 53, so that the bumper panel 2 is stably installed. In addition, the second connecting piece 6 is provided with a third connecting end surface 61 and a fourth connecting end surface 62 which are perpendicular to each other; the third connecting end surface 61 is at the bottom of the second cavity 12 and is connected with the bottom of the second cavity by bolts, and the side wall of the third connecting end surface is abutted against the inner wall of the second cavity 12; the fourth connection end face 62 is connected with the bumper face plate 2 through bolts, and the second connection end face 62 and the end face of the rear connection longitudinal beam close to the bumper face plate 2 are located on the same face. In the structure, the inner wall of the first cavity 11 of the lateral wall butt of the first connection end face 51, the inner wall of the second cavity 12 of the lateral wall butt of the third connection 61 end face, this makes the first connecting piece 6 can be stably connected with the first cavity in 11, make the second connecting piece 6 can be stably connected with the second cavity in 12, and simultaneously, the first connecting piece 5 and the second connecting piece 6 also can support the back connection longeron 1, improve the intensity of the back connection longeron 1, in addition, the mutual spacing between the first connecting piece 5 and the second connecting piece 6 and the back connection longeron 1 has improved the stability of the bumper panel 2 during installation.

As shown in fig. 1, a sign board 22, a company brand 23, and a dangerous brand 24 are riveted to the center of the bumper fascia 2, and can be visually recognized by a person. The license plate bracket 9 is installed below the middle of the bumper face 2 using bolts, and the license plate 91 and the license lamp can be installed on the license plate bracket 9. The tail lamp holes 25 are cut and processed at the two ends of the bumper panel 2 by laser, so that the tail lamps 25 can be conveniently installed; the reflector bracket 10 is installed below the two end positions of the bumper panel 2 by using bolts, and the reflector can be installed on the reflector bracket 10.

As shown in fig. 2 and 5, a reinforcing cross beam 8 is arranged between the two rear connecting longitudinal beams 1. This will strengthen the rear attachment stringer 1 and also make its attachment more stable.

As shown in fig. 5, a support plate 7 for abutting against the bumper face plate 2 is welded to the first link 5. Through welded connection backup pad 7, improved bumper panel 2's crashproof intensity, this can effectively protect bumper panel 2.

In the protection device, the brackets at the plurality of connecting positions are connected by the bolts, and the connecting holes are formed, so that the strength is met, the weight is reduced, and the welding and deformation are reduced by the bolts.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (9)

1. The utility model provides a back protector of semitrailer, connects longeron, bumper panel, inclined supporting plate and bottom end rail including the back, the back is connected the longeron and is used for being connected with the girder of semitrailer back lower extreme, the bumper panel is connected in the rear end of back connection longeron, its characterized in that:

the inclined supporting plate is made of high-strength steel, is welded to the bottom surface of the rear connecting longitudinal beam and is arranged obliquely towards the lower rear part; and the inclined support plate is provided with a lower cross beam relative to the tail end of the rear connecting longitudinal beam, and the lower cross beam is connected with the inclined support plate through a bolt.

2. The rear guard of claim 1, wherein: the rear connecting longitudinal beam is I-shaped and is provided with a first cavity and a second cavity which face to the side face and are opposite in position; the first cavity is internally provided with a first connecting piece, the second cavity is internally provided with a second connecting piece, and the first connecting piece and the second connecting piece are both used for connecting the rear connecting longitudinal beam and the bumper panel.

3. The rear guard according to claim 2, wherein: and a supporting plate for connecting a bumper panel is welded on the first connecting piece.

4. The rear guard according to claim 2, wherein: the second connecting piece is provided with a third connecting end face and a fourth connecting end face, the third connecting end face is connected with the bottom face of the second cavity, and the fourth connecting end face is connected with the bumper face plate.

5. The rear guard of claim 4, wherein: the side wall of the second connecting piece is abutted against the inner wall of the second cavity.

6. The rear guard according to claim 5, wherein: the fourth connecting end face and the end face, close to the bumper face, of the rear connecting longitudinal beam are located on the same face.

7. The rear guard of claim 2, wherein: the rear connecting longitudinal beams are at least two, and a reinforcing cross beam is arranged between every two adjacent rear connecting longitudinal beams.

8. The rear guard according to claim 1, wherein: the bumper panel is made of an aluminum profile.

9. The rear guard according to claim 1, wherein: and two ends of the bumper panel are provided with rubber sleeves.

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