A heavy truck crossbeam

Abstract

A heavy-duty truck crossbeam, relating to the field of truck crossbeam technology, includes two symmetrically arranged C-shaped crossbeam bodies, which are fixed back-to-back by fasteners. Each C-shaped crossbeam body includes a horizontally extending upper wing plate and a lower wing plate, and a vertical side plate connecting the upper and lower wing plates. The vertical side plate has semi-circular notches at both ends. An upper connecting plate includes a first plate-shaped portion fixedly connected to the upper wing plate, and a first bolt connection portion vertically disposed on the surface of the first plate-shaped portion. A lower connecting plate includes a second plate-shaped portion fixedly connected to the lower wing plate. Uniform frictional force transmission is achieved through the pre-tightened bolted full-contact side plate surface, increasing torsional stiffness compared to traditional channel-type single beams, effectively suppressing frame deformation and component damage.

Description

Technical Field

[0001] This application relates to the field of truck crossbeam technology, specifically a heavy-duty truck crossbeam. Background Technology

[0002] There are various forms of crossbeam assemblies for heavy-duty vehicle frames, among which the channel crossbeam structure is the most common. During use, the crossbeam assembly primarily bears alternating loads such as torque and bending, as well as impact loads. Under heavier loads and more severe road conditions, the crossbeam assembly requires improved comprehensive mechanical properties, including rigidity, strength, fatigue limit, deformation resistance, and toughness. Otherwise, the crossbeam is prone to deformation and cracking during use. If the crossbeam assembly is designed as a channel-shaped stamped structure, the structural space is large, restricting the layout of vehicle components. Furthermore, the channel-shaped stamped structure has low torsional stiffness, easily leading to large frame deformation and component damage. Summary of the Invention

[0003] To solve the above-mentioned technical problems, this application proposes a heavy-duty truck crossbeam;

[0004] A heavy-duty truck crossbeam includes two symmetrically arranged C-shaped crossbeam bodies, which are fixed back-to-back by fasteners. Each C-shaped crossbeam body includes a horizontally extending upper wing plate and a lower wing plate, as well as a vertical side plate connecting the upper and lower wing plates. The two C-shaped crossbeam bodies form a box-like closed section back-to-back, distributing the torsional force to the four plate surfaces and improving the overall torsional stiffness.

[0005] Furthermore, the double C-shaped crossbeams can share the same mold for stamping, and riveting and bolting can replace welding, avoiding thermal deformation and making the manufacturing cost lower than that of box beams.

[0006] Furthermore, an arc-shaped bending transition zone is provided at the connection between the vertical side plate and the upper and lower flanges to eliminate right-angle stress concentration and improve fatigue life.

[0007] Furthermore, semi-circular notches are provided at both ends of the vertical side plate;

[0008] The upper connecting plate includes a first plate-shaped portion, which is fixedly connected to the upper wing plate; it also includes a first bolt connection portion that is vertically disposed on the surface of the first plate-shaped portion.

[0009] The lower connecting plate includes a second plate-shaped portion, which is fixedly connected to the lower wing plate.

[0010] Furthermore, the C-shaped crossbeam body is rigidly connected by bolt groups that penetrate the vertical side plates, creating a full contact surface between the vertical side plates. The bolt preload ensures that the vertical side plates on the double C-shaped crossbeam body fit tightly together, ensuring that the torsional force is evenly transmitted through the contact surface and avoiding excessive local stress. At the same time, the bolt connection facilitates the replacement of damaged parts, further reducing maintenance costs.

[0011] Furthermore, an arc-shaped recessed area is provided on the lower flange to reserve installation space for the drive shaft and avoid interference; at the same time, the arc-shaped recess forms a reinforcing rib to improve the bending stiffness of the lower flange.

[0012] Furthermore, the curvature of the arc-shaped bending transition zone of the C-shaped beam body is continuously and smoothly transitioned, and the axis of symmetry of the semi-circular notch coincides with the center line of the side plate; the smooth curvature reduces the risk of stress concentration cracks, and the symmetrical notch ensures precise alignment when splicing the double C-shaped beams, reducing assembly errors.

[0013] Furthermore, the upper connecting plate and the upper wing plate, and the lower connecting plate and the lower wing plate are connected by rivets, with the rivets arranged in a double-row staggered array. The staggered layout disperses the shear load and prevents the rivet rows from forming weak lines. Compared with welding, riveting is more resistant to fatigue vibration and avoids weld cracking.

[0014] Furthermore, both the first bolt connection and the second bolt connection are L-shaped bent plates with bolt holes, and their bending direction is perpendicular to the axis of the crossbeam.

[0015] Furthermore, both the first and second bolt connection portions have countersunk grooves on their surfaces. These grooves accommodate the bolt heads and nuts, preventing damage to protruding parts from scratches and increasing the contact surface to prevent loosening.

[0016] Furthermore, weight-reduction holes are formed on the surface of the C-shaped crossbeam. These holes, located in low-stress areas, further reduce weight, decreasing the amount of steel used per piece and making it suitable for large-scale mass production.

[0017] Compared with the prior art, this application has the following beneficial effects:

[0018] The double C-shaped back-to-back structure distributes torsional force to the four plates. The pre-tightened bolt groups on the fully contact side plates achieve uniform frictional force transmission, which improves torsional stiffness compared to the traditional channel-type single beam and effectively suppresses frame deformation and component damage.

[0019] The lower flange's arc-shaped concave area provides installation space for the drive shaft, while also forming an arched reinforcing rib to improve local bending strength. Combined with the semi-circular notch and weight-reducing hole design, it further reduces weight compared to an I-beam while ensuring mechanical performance.

[0020] The double C-shaped beams are formed by stamping with a shared mold, and the double-row staggered rivet connection replaces welding. Combined with the anti-loosening design of the groove in the bolt connection part, the manufacturing cost is lower than that of the box beam. The replaceable bolt structure improves the convenience of maintenance and effectively reduces the risk of stress concentration in the longitudinal beam caused by the "hard torsion transmission" of the welded box beam. Attached Figure Description

[0021] 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, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a 3D structural diagram of a heavy-duty truck crossbeam;

[0023] Figure 2 This is a front view of the crossbeam of a heavy truck.

[0024] Figure 3 This is a top view of the crossbeam of a heavy truck.

[0025] Figure 4 This is a side view of the crossbeam of a heavy truck.

[0026] Figure 5 This is a three-dimensional structural diagram of the C-shaped crossbeam.

[0027] Figure 6 This is a three-dimensional structural diagram of the lower connecting plate;

[0028] Figure 7 This is a three-dimensional structural diagram of the upper connecting plate.

[0029] In the picture:

[0030] 1. C-shaped crossbeam body; 101. Upper flange; 102. Lower flange; 103. Vertical side plate; 104. Recessed area; 105. Semi-circular notch; 106. Through hole;

[0031] 2. Upper connecting plate; 201. First plate-shaped part; 202. First bolt connection part;

[0032] 3. Lower connecting plate; 301. Second plate-shaped part; 302. Second bolt connection part. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0034] The application principle of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] like Figure 1-7As shown, a heavy-duty truck crossbeam includes two symmetrically arranged C-shaped crossbeam bodies 1, which are fixed back-to-back by fasteners. Each C-shaped crossbeam body 1 includes a horizontally extending upper wing plate 101 and a lower wing plate 102, as well as a vertical side plate 103 connecting the upper and lower wing plates. The two C-shaped crossbeam bodies 1 form a box-like closed section back-to-back, distributing the torsional force to the four plate surfaces and improving the overall torsional stiffness.

[0036] The double C-shaped crossbeam body 1 can share the same mold for stamping, and riveting and bolting can replace welding, avoiding thermal deformation and making the manufacturing cost lower than that of box beams.

[0037] An arc-shaped bending transition zone is provided at the connection between the vertical side plate 103 and the upper wing plate 101 and the lower wing plate 102 to eliminate right-angle stress concentration and improve fatigue life.

[0038] The vertical side plate 103 has semi-circular notches 105 at both ends of its edges;

[0039] The upper connecting plate 2 includes a first plate-shaped portion 201, which is fixedly connected to the upper wing plate 101; it also includes a first bolt connection portion 202 that is vertically disposed on the surface of the first plate-shaped portion 201.

[0040] The lower connecting plate 3 includes a second plate-shaped portion 301, which is fixedly connected to the lower wing plate 102.

[0041] The C-shaped crossbeam body 1 is rigidly connected by bolts that penetrate the vertical side plates 103, forming a full contact surface between the vertical side plates 103. The bolt preload ensures that the vertical side plates 103 on the double C-shaped crossbeam body 1 fit tightly together, ensuring that the torsional force is evenly transmitted through the contact surface and avoiding excessive local stress; at the same time, the bolt connection facilitates the replacement of damaged parts, further reducing maintenance costs.

[0042] The lower wing plate 102 is provided with an arc-shaped recessed area to reserve installation space for the drive shaft and avoid interference; at the same time, the arc-shaped recess forms a reinforcing rib to improve the bending stiffness of the lower wing plate.

[0043] The curvature of the arc-shaped bending transition zone of the C-shaped beam body 1 is continuously and smoothly transitioned, and the axis of symmetry of the semi-circular notch 105 coincides with the center line of the side plate; the smooth curvature reduces the risk of stress concentration cracks, and the symmetrical notch ensures accurate alignment when splicing the double C-shaped beams, reducing assembly errors.

[0044] The upper connecting plate 2 and the upper wing plate 102, and the lower connecting plate 3 and the lower wing plate 103 are connected by rivets, which are arranged in a double-row staggered array. The staggered layout disperses the shear load and prevents the rivet rows from forming weak lines. Compared with welding, riveting is more resistant to fatigue vibration and avoids weld cracking.

[0045] Both the first bolt connection part 202 and the second bolt connection part 302 are L-shaped bent plates with bolt holes, and their bending direction is perpendicular to the axis of the crossbeam.

[0046] Both the first bolt connection portion 202 and the second bolt connection portion 302 have countersunk grooves on their surfaces. The countersunk grooves accommodate the bolt heads and nuts, preventing the protruding parts from being scratched or damaged; they also increase the contact surface to prevent loosening.

[0047] The surface of the C-shaped crossbeam body 1 is provided with weight-reduction holes. These holes, located in low-stress areas, further reduce weight, decreasing the amount of steel used per piece and making it suitable for large-scale mass production.

[0048] During the force transmission process, the longitudinal beam load is introduced into the upper and lower connecting plates through the grooved contact surface of the bolt connection part, and after the shear force is dispersed by the double row of staggered rivets, it is transmitted to the upper and lower wing plates of the double C-shaped crossbeam body utility model 1 utility model; the bending load is resisted by the force couple formed by the upper and lower wing plates, and the stress is smoothly transmitted to the vertical side plate utility model 103 utility model through the arc-shaped bending transition zone, eliminating right-angle stress concentration.

[0049] Torsional load is uniformly transmitted between the double C-shaped beams through the pre-tightened bolt group of the full-contact side plate, forming a four-way anti-torsional path of a box-shaped section; longitudinal impact is converted into radial compressive stress by the arc-shaped concave area of ​​the lower flange utility model 102 utility model 104 utility model, while the plastic deformation of the riveting node absorbs energy.

[0050] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

[0051] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A heavy-duty truck crossbeam, characterized in that: The device includes two symmetrically arranged C-shaped beam bodies (1), which are fixed back to back by fasteners. Each C-shaped beam body (1) includes a horizontally extending upper wing plate (101) and a lower wing plate (102), and a vertical side plate (103) connecting the upper and lower wing plates. An arc-shaped bending transition area is provided at the connection between the vertical side plate (103) and the upper wing plate (101) and the lower wing plate (102). Semi-circular notches (105) are provided at both ends of the vertical side plate (103). The upper connecting plate (2) includes a first plate-shaped portion (201) which is fixedly connected to the upper wing plate (101); it also includes a first bolt connection portion (202) which is vertically disposed on the surface of the first plate-shaped portion (201); The lower connecting plate (3) includes a second plate-shaped portion (301), which is fixedly connected to the lower wing plate (102).

2. The heavy-duty truck crossbeam according to claim 1, characterized in that: The C-shaped beam body (1) is rigidly connected by a bolt group that passes through the vertical side plate (103), so that the vertical side plates (103) form a full contact surface.

3. A heavy-duty truck crossbeam according to claim 1, characterized in that: The lower wing plate (102) is provided with a recessed area (104), the recessed area (104) including an arc-shaped portion provided on the lower wing plate (102).

4. A heavy-duty truck crossbeam according to claim 1, characterized in that: The curvature of the arc-shaped bending transition zone of the C-shaped beam body (1) is continuously and smoothly transitioned, and the axis of symmetry of the semi-circular notch (105) coincides with the center line of the side plate.

5. A heavy-duty truck crossbeam according to claim 1, characterized in that: The upper connecting plate (2) and the upper wing plate (101), and the lower connecting plate (3) and the lower wing plate (102) are connected by rivets, and the rivets are arranged in a double-row staggered array.

6. A heavy-duty truck crossbeam according to claim 1, characterized in that: Both the first bolt connection part (202) and the second bolt connection part (302) are L-shaped bent plates with bolt holes, and their bending direction is perpendicular to the axis of the crossbeam.

7. A heavy-duty truck crossbeam according to claim 1, characterized in that: Both the first bolt connection part (202) and the second bolt connection part (302) have grooves on their surfaces.

8. A heavy-duty truck crossbeam according to claim 1, characterized in that: The surface of the C-shaped crossbeam body (1) is provided with weight-reducing holes.

Images