Lightweight tail cross beam assembly

Abstract

The utility model discloses a light-weight tail cross beam assembly which comprises an upper connecting beam, a lower connecting beam and a tail cross beam, and the tail cross beam is composed of an upper end inclined plate, a vertical plate, an arc plate and a lower end horizontal plate. The upper end inclined plate is connected with the top of the tail end of the frame longitudinal beam through an upper connecting beam, and the lower end horizontal plate is connected with the bottom of the tail end of the frame longitudinal beam through a lower connecting beam; the vertical plate and the horizontal plate at the lower end are each provided with a long round hole matched with a T-shaped support at the end of the strap, the arc plate is of an inwards-concave arc structure, and the radius of an arc is equal to the radius of a cylinder on the outer wall of an air cylinder. The air cylinder is directly installed on the tail cross beam through the strap and attached to the arc plate, an air cylinder fixing support does not need to be additionally arranged, and compared with the prior art, the air cylinder connecting structure has the advantages of being smaller in vibration amplitude and more reliable in connection, driving safety is improved, meanwhile, the weight and cost of the frame are reduced, and the service life of the frame is prolonged. And the structure is simplified, so that the assembly efficiency of the whole vehicle can be improved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle frame technology, and in particular to a lightweight rear crossbeam assembly. Background Technology

[0002] The main function of the rear crossbeam assembly is to connect the left and right longitudinal beams of the frame using fasteners to enhance the overall strength and torsional rigidity of the frame. In addition, it provides a stable mounting platform for components such as air tanks, pipeline supports, and vehicle nameplates.

[0003] To make more efficient use of the vehicle's layout space, brake air reservoirs are typically installed on the rear crossbeam of the chassis. Currently, the most common method is to create mounting holes on the lower flange or side of the rear crossbeam to install brackets for securing the air reservoirs, and then install the air reservoirs onto the brackets. While this design is feasible, it has several problems: it increases the overall weight and cost of the vehicle and reduces assembly efficiency. More importantly, when the vehicle is traveling on rough or bumpy roads, the air reservoir mounting brackets are prone to cracking or breaking, causing the air reservoirs to detach, which in extreme cases could seriously affect driving safety. Summary of the Invention

[0004] To address the aforementioned technical problems, this utility model provides a lightweight tail beam assembly. To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments. Its sole purpose is to present some concepts in a simple form as a prelude to the detailed description that follows.

[0005] The present invention adopts the following technical solution:

[0006] A lightweight rear crossbeam assembly is provided, comprising: an upper connecting beam, a lower connecting beam, and a rear crossbeam. The rear crossbeam is composed of an upper inclined plate, a vertical plate, an arc plate, and a lower horizontal plate, which are integrally formed and connected from top to bottom. The upper inclined plate is connected to the top of the rear end of the longitudinal beam of the vehicle frame through the upper connecting beam, and the lower horizontal plate is connected to the bottom of the rear end of the longitudinal beam of the vehicle frame through the lower connecting beam. Both the vertical plate and the lower horizontal plate have elongated holes adapted to the T-shaped brackets at the ends of the clamps. The arc plate has a concave arc structure, and the radius of the arc is equal to the radius of the cylinder on the outer wall of the air tank.

[0007] Furthermore, the horizontal included angle of the upper inclined plate is 10°-13°.

[0008] Furthermore, the length of the oblong hole is less than the length of the T-shaped bracket at the end of the hoop.

[0009] Furthermore, a weight-reducing groove is provided in the middle area of ​​the upper wall edge of the upper inclined plate and the middle area of ​​the lower wall edge of the lower horizontal plate; an arc notch with a radius of more than 40mm is provided at both ends of the vertical plate, and the notch extends to both ends of the lower horizontal plate.

[0010] Furthermore, four first assembly holes are provided on each side of the upper inclined plate for connecting with the upper connecting beam; four second assembly holes are provided on each side of the lower horizontal plate for connecting with the lower connecting beam; and nameplate assembly holes and pipeline fixing bracket assembly holes are provided on the vertical plate.

[0011] Furthermore, there are two upper connecting beams, which are symmetrical to each other and are respectively arranged on the left longitudinal beam and the right longitudinal beam of the frame; the cross-section of the upper connecting beam is L-shaped, and the upper connecting beam is composed of a side panel and a top panel, the front end of the top panel is horizontal, and the rear end of the top panel is inclined.

[0012] Furthermore, the front end of the top panel is fitted with the upper flange of the frame longitudinal beam; the rear end of the top panel has four mounting holes and is connected to the upper inclined plate by fasteners; the side panel has several through holes and is connected to the web panel of the frame longitudinal beam by fasteners.

[0013] Furthermore, the lower connecting beam has an L-shaped cross-section and is composed of a vertical plate and a horizontal plate; there are two lower connecting beams, which are symmetrical to each other and are respectively set on the left longitudinal beam and the right longitudinal beam of the frame.

[0014] Furthermore, the vertical plate has four through holes and is connected to the web panel of the frame longitudinal beam by fasteners; the transverse plate is fitted to the lower flange of the frame longitudinal beam and has four round holes and is connected to the lower horizontal plate by fasteners.

[0015] Furthermore, the upper connecting beam, the lower connecting beam, and the tail crossbeam are all made of steel plates with a yield strength of not less than 610 MPa; the thickness of the upper connecting beam and the lower connecting beam is 6 mm; and the thickness of the tail crossbeam is 5 mm.

[0016] The beneficial effects of this utility model are as follows: The rear crossbeam is designed with an upper inclined plate, a vertical plate, an arc plate, and a lower horizontal plate. The upper connecting beam works in conjunction with the upper inclined plate, and the lower connecting beam works in conjunction with the lower horizontal plate, thereby realizing the installation and fixation between the rear crossbeam assembly and the longitudinal beam of the frame. The air tank can be directly installed on the rear crossbeam by means of a hoop and fits against the arc plate, without the need for an additional air tank fixing bracket. Compared with the existing technology that uses an air tank fixing bracket, the structural design of this application has the advantages of smaller vibration amplitude and more reliable connection, thereby improving driving safety. At the same time, since the use of the air tank fixing bracket is eliminated, the weight and cost of the frame are reduced, and the simplification of the structure can also improve the assembly efficiency of the whole vehicle. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a structural schematic diagram of a lightweight tail beam assembly according to this utility model;

[0019] Figure 2 This is a front view of a lightweight tail beam assembly according to this utility model;

[0020] Figure 3 This is a right view of a lightweight tail beam assembly according to this utility model;

[0021] Figure 4 This is a cross-sectional schematic diagram of the tail beam of this utility model;

[0022] Figure 5 This is a schematic diagram of the unfolded structure of the tail crossbeam of this utility model;

[0023] Figure 6 This is a structural schematic diagram of the upper connecting beam of this utility model;

[0024] Figure 7 This is a structural schematic diagram of the lower connecting beam of this utility model. Detailed Implementation

[0025] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings. It should be understood that the described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0026] like Figure 1-7 As shown, in some illustrative embodiments, a lightweight tail beam assembly is provided, including: an upper connecting beam 100, a lower connecting beam 200, and a tail beam 300.

[0027] The rear crossbeam 300 is used to support the air tank 600 and connects the left and right frame longitudinal beams to provide lateral support. The rear crossbeam 300 is composed of an upper inclined plate 310, a vertical plate 320, an arc plate 330 and a lower horizontal plate 340 connected sequentially from top to bottom. The rear crossbeam 300 is integrally stamped, that is, the upper inclined plate 310, the vertical plate 320, the arc plate 330 and the lower horizontal plate 340 are integrally formed structures to ensure the overall strength and rigidity of the components, and to reduce the number of components and welding points.

[0028] There are two upper connecting beams 100. The two upper connecting beams 100 are symmetrical to each other and are respectively set at the top of the rear end of the left longitudinal beam 400 and the right longitudinal beam 500 of the frame, so that the two ends of the rear crossbeam 300 can be installed on the left longitudinal beam 400 and the right longitudinal beam 500 of the frame through the two upper connecting beams 100, thereby maintaining the balance and stability of the frame.

[0029] like Figure 6 As shown, the upper connecting beam 100 has an L-shaped cross section. Specifically, the upper connecting beam 100 is composed of a side panel 110 and a top panel 120, and the two are integrally formed structures, which are achieved through a stamping process.

[0030] The front end of the top panel 120 is horizontal, meaning that the front end of the top panel 120 is in a horizontal state. After installation, the front end of the top panel 120 fits against the upper flange 451 of the frame longitudinal beam, which helps to evenly distribute the load, reduce stress concentration, and improve stability.

[0031] The rear end of the top panel 120 is inclined, meaning that the rear end of the top panel 120 is in an inclined state, and the inclination angle is consistent with that of the upper inclined plate 310. Specifically, the horizontal included angle of the upper inclined plate 310 is 10°-13°. The above structural design helps to match the geometry of other parts of the frame, such as ensuring that the trailer does not interfere with the tail beam during driving, while also effectively transmitting and dispersing the force from the tail beam 300, providing a stable connection point.

[0032] The top panel 120 has four mounting holes 130 at its rear end, allowing it to be connected to the upper inclined plate 310 via fasteners. Simultaneously, the side panel 110 has several through holes 140, which are connected to the web panel 452 of the frame longitudinal beam via fasteners. This allows the upper inclined plate 310 to be fixed in place between the upper connecting beam 100 and the top of the rear end of the frame longitudinal beam. Bolt fasteners can be used.

[0033] like Figure 7 As shown, the lower connecting beam 200 has an L-shaped cross-section. Specifically, the lower connecting beam 200 is composed of a vertical plate 210 and a transverse plate 220, which are integrally formed through bending or stamping processes. There are two lower connecting beams 200, which are symmetrical to each other and respectively located at the bottom of the rear ends of the left longitudinal beam 400 and the right longitudinal beam 500 of the frame, so that both ends of the rear crossbeam 300 can be installed onto the left longitudinal beam 400 and the right longitudinal beam 500 of the frame through the two lower connecting beams 200. In this embodiment, both ends of the rear crossbeam 300 are fixedly installed onto the frame longitudinal beams through an upper connecting beam 100 and a lower connecting beam 200, connecting the left and right longitudinal beams of the frame. This not only further enhances the overall strength and torsional stiffness of the frame, but also ensures the firmness of the rear crossbeam 300, thereby providing stable support for the air tank 600.

[0034] Four through holes 230 are formed on the vertical plate 210, which is connected to the web panel 452 of the frame longitudinal beam through fasteners. Simultaneously, the transverse plate 220 is fitted to the lower flange 453 of the frame longitudinal beam, and four round holes 240 are formed on the transverse plate 220, which is connected to the lower horizontal plate 340 through fasteners. This allows the lower horizontal plate 340 to be fixed to the bottom of the rear end of the frame longitudinal beam via the lower connecting beam 200. Bolt fasteners can be used.

[0035] The upper connecting beam 100, lower connecting beam 200, and tail crossbeam 300 are made of high-strength steel plates, with a material strength of 610L or higher. Specifically, the upper connecting beam 100, lower connecting beam 200, and tail crossbeam 300 all use high-strength low-alloy steel plates with a yield strength of not less than 610MPa, ensuring that the structure maintains high strength and durability while meeting the requirements for lightweight design. The upper connecting beam 100 and lower connecting beam 200 have a thickness of 6mm, and the tail crossbeam 300 has a thickness of 5mm.

[0036] The tail crossbeam 300 is composed of an upper inclined plate 310, a vertical plate 320, an arc plate 330, and a lower horizontal plate 340 connected sequentially from top to bottom. Both the vertical plate 320 and the lower horizontal plate 340 have elongated holes 350 that are adapted to the T-shaped brackets 710 at the ends of the clamp 700. The clamp 700 is used to fix the air tank 600, and T-shaped brackets 710 are provided at both ends of it. The T-shaped brackets 710 are used to connect the clamp 700 and the tail crossbeam 300. In this embodiment, the adaptation of the elongated hole 350 to the T-shaped bracket 710 means that the length L1 of the elongated hole 350 is less than the length L2 of the T-shaped bracket 710, ensuring that the T-shaped bracket 710 at the end of the clamp 700 is not easily removed after being assembled on the tail crossbeam 300, thus increasing the safety of the air tank 600 connection.

[0037] The arc plate 330 has a concave arc structure with the concave direction facing the frame. The radius R1 of the concave arc structure is equal to the radius R2 of the outer cylindrical wall of the air tank 600, so that the outer wall of the air tank 600 can fit tightly with the arc plate 330. After tightening the bolts 700 on both sides of the air tank 600, the air tank 600 can be firmly fixed to the rear crossbeam 300. Even on bumpy roads, the air tank 600 will not loosen or fall off, improving vehicle driving safety.

[0038] The upper inclined plate 310 has four first mounting holes 360 on each side for connecting to the upper connecting beam 100, and the positions of the first mounting holes 360 correspond to the mounting holes 130. The lower horizontal plate 340 has four second mounting holes 370 on each side for connecting to the lower connecting beam 200, and the positions of the second mounting holes 370 correspond to the circular holes 240. The vertical plate 320 has nameplate mounting holes 380 and pipe fixing bracket mounting holes 390. The nameplate mounting holes 380 are used for installing the vehicle nameplate, and the pipe fixing bracket mounting holes 390 are used for installing the pipe fixing bracket.

[0039] Weight-reducing grooves 800 are provided in the middle area of ​​the upper edge of the upper inclined plate 310 and the middle area of ​​the lower edge of the lower horizontal plate 340; arc-shaped notches 900 with a radius of more than 40mm are provided at both ends of the vertical plate 320, and the notches 900 extend to both ends of the lower horizontal plate 340. The design of the weight-reducing grooves 800 and the notches 900 can remove redundant material from the tail beam 300, thereby realizing the lightweight design of the tail beam. At the same time, the design of the notches 900 also facilitates the layout of pipelines.

[0040] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A lightweight tail beam assembly, characterized in that, include: The system includes an upper connecting beam, a lower connecting beam, and a tail crossbeam. The tail crossbeam is composed of an upper inclined plate, a vertical plate, an arc plate, and a lower horizontal plate, which are connected sequentially from top to bottom and are integrally formed. The upper inclined plate is connected to the top of the tail end of the longitudinal beam of the frame through the upper connecting beam, and the lower horizontal plate is connected to the bottom of the tail end of the longitudinal beam of the frame through the lower connecting beam. Both the vertical plate and the lower horizontal plate have elongated holes that are adapted to the T-shaped brackets at the ends of the hoop. The arc plate has a concave arc structure, and the radius of the arc is equal to the radius of the cylinder on the outer wall of the air tank.

2. The lightweight tail beam assembly according to claim 1, characterized in that, The horizontal included angle of the upper inclined plate is 10°-13°.

3. A lightweight tail beam assembly according to claim 2, characterized in that, The length of the oblong hole is less than the length of the T-shaped bracket at the end of the hoop.

4. A lightweight tail beam assembly according to claim 3, characterized in that, Weight-reducing grooves are provided in the middle area of ​​the upper wall edge of the upper inclined plate and the middle area of ​​the lower wall edge of the lower horizontal plate; arc notches with a radius of more than 40mm are provided at both ends of the vertical plate, and the notches extend to both ends of the lower horizontal plate.

5. A lightweight tail beam assembly according to claim 4, characterized in that, Four first assembly holes are provided on each side of the upper inclined plate for connecting with the upper connecting beam; Four second assembly holes are provided on each side of the lower horizontal plate for connecting with the lower connecting beam; The vertical plate has nameplate mounting holes and pipe fixing bracket mounting holes.

6. A lightweight tail beam assembly according to claim 5, characterized in that, There are two upper connecting beams, which are symmetrical to each other and are respectively set on the left longitudinal beam and the right longitudinal beam of the frame. The upper connecting beam has an L-shaped cross-section and is composed of a side panel and a top panel. The front end of the top panel is horizontal and the rear end of the top panel is inclined.

7. A lightweight tail beam assembly according to claim 6, characterized in that, The front end of the top panel is fitted to the upper flange of the frame longitudinal beam; the rear end of the top panel has four mounting holes and is connected to the upper inclined plate by fasteners; the side panel has several through holes and is connected to the web panel of the frame longitudinal beam by fasteners.

8. A lightweight tail beam assembly according to claim 7, characterized in that, The lower connecting beam has an L-shaped cross-section and is composed of a vertical plate and a horizontal plate. There are two lower connecting beams, which are symmetrical to each other and are respectively installed on the left longitudinal beam and the right longitudinal beam of the frame.

9. A lightweight tail beam assembly according to claim 8, characterized in that, The vertical plate has four through holes and is connected to the web panel of the frame longitudinal beam with fasteners; the transverse plate is fitted to the lower flange of the frame longitudinal beam and has four round holes and is connected to the lower horizontal plate with fasteners.

10. A lightweight tail beam assembly according to claim 9, characterized in that, The upper connecting beam, the lower connecting beam, and the tail crossbeam are all made of steel plates with a yield strength of not less than 610 MPa; the thickness of the upper connecting beam and the lower connecting beam is 6 mm; and the thickness of the tail crossbeam is 5 mm.

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