Front-end cross beam assembly of heavy-duty car frame

Abstract

The utility model relates to a front-end cross beam assembly of a heavy-duty car frame, which comprises longitudinal beams which are arranged in parallel relatively, front connecting beams are arranged at the end parts of the longitudinal beams, and the front connecting beams are fixedly connected through a front-end cross beam component; the front end cross beam assembly comprises a cross beam, and the cross beam comprises a first columnar pipe body, an unequal-wall-thickness transition pipe body and a second columnar pipe body; the two ends of the first columnar pipe body are connected with transition pipe bodies with different wall thicknesses, and one ends of the transition pipe bodies with the different wall thicknesses are connected with the second columnar pipe body. One end of each second columnar pipe body is fixed on one side of the front connecting beam through a connecting flange; and an integrated bracket is mounted on the cross beam. The front end cross beam assembly of the heavy-duty car frame is high in material utilization rate, light in weight, low in cost, good in product consistency and high in production efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of crossbeam assembly, especially a heavy -duty truck frame front end crossbeam assembly. BACKGROUND

[0002] With the continuous development of society, heavy -duty truck has obtained the rapid development in transportation industry. In heavy -duty truck, the frame is the load-bearing matrix of heavy -duty truck, generally by two longitudinal beams and several crossbeams are formed, and its structural type is generally front wide and rear narrow, to meet the arrangement needs of large -power engine radiator, install front connecting beam at the frame front end to increase radiator arrangement space, connect left and right front connecting beam through the front end crossbeam, improve the torsional stiffness of frame, play the role of strengthening and anti -collision and support electrical components. The front end crossbeam of existing heavy -duty truck is generally welded by equal wall thickness, equal cross section round pipe and two side cast connecting flange, and several independent supports are welded in the crossbeam to meet the installation of electrical components, according to the polar moment of inertia of cross section of round pipe The formula is that D represents the outer circle diameter, and d represents the inner circle diameter, and this structure can make the front end crossbeam consistent in length direction torsional stiffness, but the material utilization rate is low, increases the whole vehicle weight and cost, and the production efficiency is reduced by welding multiple independent supports, and the product consistency is poor. SUMMARY

[0003] The utility model solves the technical problems that in order to solve the problems in the above background art, provide a kind of heavy -duty truck frame front end crossbeam assembly, set up the connecting flange of stamping forming realizes the quick connection assembly of weight reduction, the middle crossbeam of thermal expansion forming is set up, structure is unequal cross section unequal wall thickness, material utilization rate is high, light in weight, low in cost;Integrated overall support is equipped on the middle crossbeam, and the product consistency is good, and production efficiency is high.

[0004] The utility model solves the technical problems and adopts the technical scheme that a kind of heavy -duty truck frame front end crossbeam assembly, including the longitudinal beam of relative parallel arrangement, the longitudinal beam end portion is all installed front connecting beam, and the front connecting beam is fixedly connected by front end crossbeam component;The front end crossbeam component includes crossbeam, and the crossbeam includes first columnar pipe body, unequal wall thickness transition pipe body and second columnar pipe body;The first columnar pipe body both ends are connected with unequal wall thickness transition pipe body, and the unequal wall thickness transition pipe body one end is all connected with second columnar pipe body;Second columnar pipe body one end is all fixed in front connecting beam side by connecting flange;Integrated support is installed on the crossbeam.

[0005] Further limit, in the above technical scheme, the first columnar pipe body, unequal wall thickness transition pipe body and second columnar pipe body are one-piece structure.

[0006] Further, in the above technical solution, the wall thickness of the first columnar pipe body is smaller than that of the second columnar pipe body, and the inner diameter of the first columnar pipe body is smaller than that of the second columnar pipe body.

[0007] Further, in the above technical solution, mounting holes are arranged on both sides of the connecting flange, and the connecting flange is fixedly connected to the front beam side wall by bolts.

[0008] Further, in the above technical solution, one end of the connecting flange is fixedly connected to one end of the second columnar pipe body by friction welding.

[0009] Further, in the above technical solution, the integrated support comprises an arc-shaped connecting plate, a lower end of the arc-shaped connecting plate is vertically connected to a radar support mounting plate, and an upper end of the arc-shaped connecting plate is connected to a horn mounting plate.

[0010] Further, in the above technical solution, the arc-shaped connecting plate, the radar support mounting plate and the horn mounting plate are in an integrated structure.

[0011] Further, in the above technical solution, a radar support fixing bolt is vertically arranged on the radar support mounting plate.

[0012] Further, in the above technical solution, a horn support mounting hole is arranged on the horn mounting plate, and a flange is arranged on one side of the horn mounting plate.

[0013] Further, in the above technical solution, a boss reinforcing rib is further arranged at the connecting position of the arc-shaped connecting plate and the radar support mounting plate, and the boss reinforcing rib is arranged at an upper end of the radar support mounting plate.

[0014] The heavy truck frame front end beam assembly provided by the present application realizes weight reduction, rapid connection and assembly by arranging a stamping formed connecting flange, the intermediate beam arranged by thermal expansion forming has an unequal section and an unequal wall thickness, and has high material utilization rate, light weight and low cost; the integrated overall support arranged on the intermediate beam has good product consistency and high production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0016] Figure 1 is a structural schematic diagram of the present application;

[0017] Figure 2 is Figure 1 Structure diagram of front end cross beam assembly Figure 1 ;

[0018] Figure 3 is Figure 1 Structure diagram of front end cross beam assembly Figure 2 ;

[0019] Figure 4 is Figure 3 Structure diagram of cross beam

[0020] Figure 5 is Figure 1 Structure diagram of connecting flange

[0021] Figure 6 is Figure 1 Structure diagram of integrated support

[0022] Figure 7 is Figure 1 Side assembly diagram of cross beam and integrated support

[0023] The reference signs in the drawings are: 1, longitudinal beam, 2, front connecting beam, 3, cross beam, 4, first columnar pipe body, 5, unequal wall thickness transition pipe body, 6, second columnar pipe body, 7, connecting flange, 8, integrated support, 8-1, arc-shaped connecting plate, 8-2, radar support mounting plate, 8-3, horn mounting plate, 8-4, radar support fixing bolt, 8-5, horn support mounting hole, 8-6, flange, 8-7, boss reinforcing rib, 9, mounting hole. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clearly understood, the utility model is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and are not used to limit the utility model.

[0025] In the application, the arc-shaped connecting plate 8-1, the radar support mounting plate 8-2, the flange 8-6 and the boss reinforcing rib 8-7 are an integral structure. Figure 4 The unequal wall thickness transition pipe body 5 is indicated in the dashed box.

[0026] See Figures 1-7The front end cross beam assembly of the heavy truck frame is shown, which comprises longitudinally arranged longitudinal beams 1, front connecting beams 2 mounted at the ends of the longitudinal beams 1, and a front end cross beam assembly fixedly connected between the front connecting beams 2. The front end cross beam assembly comprises a cross beam 3, which comprises a first columnar pipe body 4, a transition pipe body 5 with unequal wall thickness, and a second columnar pipe body 6. The first columnar pipe body 4 is connected to the transition pipe body 5 at both ends, and the transition pipe body 5 is connected to the second columnar pipe body 6 at one end. The second columnar pipe body 6 is fixed to one side of the front connecting beam 2 through a connecting flange 7 at one end. An integrated support 8 is mounted on the cross beam 3.

[0027] The first columnar pipe body 4, the transition pipe body 5 with unequal wall thickness, and the second columnar pipe body 6 are integrated. The wall thickness of the first columnar pipe body 4 is smaller than that of the second columnar pipe body 6, and the inner diameter of the first columnar pipe body 4 is smaller than that of the second columnar pipe body 6. Mounting holes 9 are provided on both sides of the connecting flange 7, and the connecting flange 7 is fixedly connected to the side wall of the front connecting beam 2 by bolts. The connecting flange 7 is fixedly connected to one end of the second columnar pipe body 6 by friction welding. The integrated support 8 comprises an arc-shaped connecting plate 8-1, a radar support mounting plate 8-2 vertically connected to the lower end of the arc-shaped connecting plate 8-1, and a horn mounting plate 8-3 connected to the upper end of the arc-shaped connecting plate 8-1. The arc-shaped connecting plate 8-1, the radar support mounting plate 8-2, and the horn mounting plate 8-3 are integrated. Radar support fixing bolts 8-4 are vertically arranged on the radar support mounting plate 8-2. Horn support mounting holes 8-5 are provided on the horn mounting plate 8-3, and a flange 8-6 is provided on one side of the horn mounting plate 8-3. A boss reinforcing rib 8-7 is further provided at the connection between the arc-shaped connecting plate 8-1 and the radar support mounting plate 8-2, and the boss reinforcing rib 8-7 is arranged at the upper end of the radar support mounting plate 8-2.

[0028] The conventional front end cross beam assembly of the heavy truck frame comprises a cross beam, which is made of a pipe body with equal diameter. Due to the large torque at the connection between the two ends of the cross beam and the front connecting beam or the longitudinal beam, a thick-walled pipe is usually selected as the cross beam, which increases the self-weight of the cross beam, increases the investment cost, and makes the cross beam appear very bulky and inconvenient for later assembly. One or more supports are usually mounted on the cross beam for fixed installation, and other components such as horns and radars are installed through the supports. This requires multiple weldings on the cross beam, which is complicated to operate and may cause stress concentration on the cross beam, resulting in cracking or breaking risk and great use safety hazard of the overall cross beam assembly. The connecting flange is usually cast into shape to enhance its strength, but the casting weight is large, and the ordinary welding shape of the cross beam is adopted, which makes the overall concentricity poor and often causes breaking phenomenon during use, and the overall connection strength is poor.

[0029] The heavy-duty truck frame front end cross beam assembly, the cross beam 3 adopts the thermal expansion forming process, the pipe wall is thick at the connecting flange 7, which can significantly improve the strength of the connection, and the connecting flange 7 and the second columnar pipe body 6 are connected by the friction welding mode, which can significantly improve the coaxiality of the whole cross beam assembly.

[0030] A heavy-duty truck frame front end cross beam assembly is composed of two side connecting flanges 7, a cross beam 3 and an integrated support 8. The two side connecting flanges 7 are welded together with the second columnar pipe body 6 on the cross beam 3 by friction welding, and the integrated support 8 is welded on the cross beam 3 by gas shielded welding.

[0031] The connecting flange 7 is made of high-strength steel plate by stamping forming process, and the connecting flange 7 is provided with mounting holes, and the left and right front beams 2 are connected together by fasteners. The edge of the connecting flange 7 is in a wave shape, which removes redundant materials and reduces weight.

[0032] The middle circular pipe cross beam 3 selects high-strength seamless cold-drawn circular steel pipes, which are processed by thermal expansion forming process, and the cross section shape is that the diameter of the two ends is large and the diameter of the middle is small. The wall thickness of the first columnar pipe body 4 is smaller than that of the second columnar pipe body 6, and the inner diameter of the first columnar pipe body 4 is smaller than that of the second columnar pipe body 6. The unequal wall thickness is formed in the unequal cross section transition area. The friction welding butt joint position of the two side connecting flanges 7 and the second columnar pipe body 6 is improved by increasing the diameter and wall thickness of the circular pipe to improve the welding strength, and the diameter and wall thickness of the middle stress smaller position are reduced, which can improve the material utilization rate, reduce the weight and cost of the whole vehicle.

[0033] The integrated support 8 is welded on the cross beam 3 by gas shielded welding, and the upper end is provided with a horn support mounting hole 8-5 and a limiting flange 8-6. When the horn support is disassembled, it will not rotate. The lower end is provided with three surface convex welding bolts, i.e. radar support fixing bolts 8-4, which are used to fix the radar mounting support. The integrated whole support is stamped with multiple boss reinforcing ribs 8-7 to improve the strength and rigidity of the integrated support 8.

[0034] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the technical field according to the technical scheme and the application concept of the present application within the technical range disclosed by the present application can make equivalent replacement or change, which should be covered in the protection scope of the present application.

Claims

1. A heavy-duty truck frame front cross member assembly, characterized by: The application relates to a front end beam assembly of a truck, which comprises relatively parallel longitudinal beams, front connecting beams mounted at the ends of the longitudinal beams, and a front end beam assembly fixedly connected between the front connecting beams.

2. The heavy-duty vehicle frame front crossmember assembly of claim 1, wherein: The first columnar pipe body, the unequal wall thickness transition pipe body and the second columnar pipe body are integrated structures.

3. The heavy-duty vehicle frame front crossmember assembly of claim 1, wherein: The wall thickness of the first columnar pipe body is smaller than that of the second columnar pipe body, and the inner diameter of the first columnar pipe body is smaller than that of the second columnar pipe body.

4. The heavy-duty vehicle frame front crossmember assembly of claim 1, wherein: The connecting flanges are fixedly connected to the side walls of the front connecting beams through bolts.

5. The heavy-duty vehicle frame front crossmember assembly of claim 1, wherein: One end of the connecting flange is fixedly connected to one end of the second columnar pipe body through friction welding.

6. The heavy-duty vehicle frame front crossmember assembly of claim 1, wherein: The integrated support comprises an arc-shaped connecting plate, a radar support mounting plate vertically connected to the lower end of the arc-shaped connecting plate, and a horn mounting plate connected to the upper end of the arc-shaped connecting plate.

7. The heavy-duty vehicle frame front crossmember assembly of claim 6, wherein: The arc-shaped connecting plate, the radar support mounting plate and the horn mounting plate are integrated structures.

8. The heavy-duty vehicle frame front crossmember assembly of claim 6, wherein: A radar support fixing bolt is vertically arranged on the radar support mounting plate.

9. The heavy-duty vehicle frame front crossmember assembly of claim 6, wherein: A horn support mounting hole is arranged on the horn mounting plate, and a flange is arranged on one side of the horn mounting plate.

10. The heavy-duty vehicle frame front crossmember assembly of claim 6, wherein: A boss reinforcing rib is further arranged at the connecting position of the arc-shaped connecting plate and the radar support mounting plate, and the boss reinforcing rib is arranged on the upper end of the radar support mounting plate.

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