A semi-trailer girder through beam

Abstract

The utility model discloses a half trailer girder through beam, including two parallelly arranged main through beams, a plurality of upper horizontal support beams are fixedly connected between two main through beams, the upper horizontal support beam with main through beam perpendicularity is established, two main through beams still are connected with lower horizontal support beam between, the vertical connecting support rod is connected between lower horizontal support beam both ends with upper horizontal support beam, longitudinal auxiliary rod is equipped between two adjacent lower horizontal support beams, and the longitudinal auxiliary rod is connected with the inclined reinforcing support rod of fixed block between upper horizontal support beam. Advantageous effects lie in: the inclined vertical connecting support rod connects upper and lower cross beams and guides stress, reduces stress concentration, the longitudinal auxiliary rod supplements longitudinal support, and the inclined reinforcing support rod with the included angle disperses lateral and shearing force, and finally overall optimization structure comprehensive performance, adapts heavy load transportation demand.

Description

Technical Field

[0001] This utility model relates to the field of semi-trailer chassis structure, specifically to a semi-trailer main beam through beam. Background Technology

[0002] As a heavy-duty transport vehicle, the main beam of a semi-trailer is the core structure that bears the weight of the cargo and transmits the driving load. Through its connection with other frame components, the main beam bears the center of gravity and load of the entire vehicle and is the supporting skeleton of the entire vehicle structure, which directly affects the load-bearing capacity, driving stability and service life of the semi-trailer.

[0003] The existing semi-trailer main beams mostly adopt a simple structure of "double main beams + single-layer crossbeams". Under long-term heavy-load transportation scenarios, they are prone to insufficient lateral bending resistance. The main beams are prone to lateral displacement under the pressure of heavy cargo. The stress concentration phenomenon is obvious, and the connection nodes between the crossbeams and the main beams and the ends of the supporting components are prone to cracking due to stress concentration. Utility Model Content

[0004] The purpose of this utility model is to provide a through beam for semi-trailer beams in order to solve the above problems, as detailed below.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This utility model provides a semi-trailer main beam, comprising two parallel main beams, with multiple upper transverse support beams fixedly connected between the two main beams. The upper transverse support beams are perpendicular to the main beams and are spaced apart along the length of the main beams. A lower transverse support beam is also connected between the two main beams, located below the upper transverse support beams and corresponding to them one-to-one. Vertical connecting struts are connected between the two ends of each lower transverse support beam and the upper transverse support beams. These vertical connecting struts are inclined, with their high ends extending towards the middle section of the lower transverse support beam. A longitudinal auxiliary rod is provided between adjacent lower transverse support beams, and a diagonal reinforcing strut is fixedly connected to the upper transverse support beam via a block. The diagonal reinforcing strut forms an angle with the horizontal direction of the lower transverse support beam.

[0006] Preferably, the high end of the vertical connecting strut is fixedly connected to the upper transverse support beam, and the low end of the vertical connecting strut extends toward the end of the lower transverse support beam and is fixedly connected to the lower transverse support beam.

[0007] Preferably, the lower end of the vertical connecting strut extends toward the connection position with the main through beam and the lower transverse support beam, and is provided with a groove corresponding to that position.

[0008] Preferably, the longitudinal auxiliary rods between the plurality of upper transverse support beams are of the same rod-shaped structure, and the connection positions of the longitudinal auxiliary rods and the upper transverse support beams are provided with slots for mutual insertion and matching, and the slot positions of the longitudinal auxiliary rods and the upper transverse support beams are welded together.

[0009] Preferably, the upper transverse support beam has an "I" shaped vertical cross section, and the lower transverse support beam has a "door" shaped vertical cross section with the opening facing downwards. The upper transverse support beam is welded and fixed to the main through beam, and the lower transverse support beam is welded and fixed to the main through beam.

[0010] Preferably, the opposing surfaces of the upper transverse support beam and the lower transverse support beam are trapezoidal, and the trapezoidal surfaces extend toward the cavity between the upper transverse support beam and the lower transverse support beam.

[0011] Preferably, the intervals between the multiple upper transverse support beams along the length of the main through beam are equal, and the intervals are 600-800mm.

[0012] Preferably, the cross-sections of the vertical connecting strut and the diagonal reinforcing strut are inverted "U" shapes, and the distance between the two open sidewalls increases sequentially from their sealed end toward the open end.

[0013] The beneficial effects are: The upper transverse support beams distributed at intervals in the device reinforce the main through beam and distribute the load. The lower transverse support beams corresponding to the upper transverse support beams form a double layer of transverse support, which enhances the bending resistance. Inclined vertical connecting struts connect the upper and lower crossbeams and guide the force, reducing stress concentration; Longitudinal auxiliary rods supplement longitudinal support, while angled reinforcing struts disperse lateral and shear forces, ultimately optimizing the overall structural performance to meet heavy-duty transportation needs. Attached Figure Description

[0014] 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.

[0015] Figure 1 This is a top view of the present invention; Figure 2 yes Figure 1 A magnified schematic diagram of a local structure; Figure 3 yes Figure 2 A sectional view; Figure 4 yes Figure 2 A cross-sectional view of the diagonal reinforcing strut.

[0016] The annotations in the attached figures are explained as follows: 1. Main through beam; 2. Upper transverse support beam; 3. Lower transverse support beam; 4. Vertical connecting struts; 5. Diagonal reinforcing struts; 6. Longitudinal auxiliary connecting rods. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0018] First embodiment: See Figures 1-4 As shown, this utility model provides a semi-trailer main beam through beam, including two parallel main through beams 1, and a number of upper transverse support beams 2 are fixedly connected between the two main through beams 1. The upper transverse support beams 2 are arranged perpendicularly to the main through beams 1 and are distributed at intervals along the length direction of the main through beams 1, which can effectively enhance the transverse connection strength of the main through beams 1, prevent them from undergoing lateral deformation when under stress, and at the same time evenly distribute the load above to the two main through beams 1. Between the two main through beams 1, there are also lower transverse support beams 3 that correspond one-to-one with the upper transverse support beams 2. These lower transverse support beams 3 are located below the upper transverse support beams 2. The lower transverse support beams 3 can cooperate with the upper transverse support beams 2 to form a double-layer transverse support, which improves the transverse bending resistance and structural stability of the entire through beam. Between the two ends of the lower transverse support beam 3 and the corresponding upper transverse support beam 2, there are inclined vertical connecting struts 4, and the high end of the vertical connecting struts 4 extends toward the middle section of the lower transverse support beam 3. The connecting struts 4 can guide and transmit the force between the upper transverse support beam 2 and the lower transverse support beam 3, and enhance the connection rigidity between the upper and lower transverse supports. A longitudinal auxiliary rod 6 is provided between two adjacent lower transverse support beams 3. The longitudinal auxiliary rod 6 is parallel to the main through beam 1 and can assist the main through beam 1 in bearing part of the longitudinal load, thereby improving the longitudinal integrity and tensile and compressive strength of the entire structure. The longitudinal auxiliary rod 6 and the upper transverse support beam 2 are connected by a fixed block by an oblique reinforcing strut 5, and the oblique reinforcing strut 5 has an angle with the horizontal direction of the lower transverse support beam 3. This obliquely set strut can effectively disperse the lateral force and shear force generated by the impact of goods and road bumps, and transfer the force to a wider structural area, further optimizing the stress distribution of the entire beam and improving the overall load-bearing capacity and deformation resistance of the structure.

[0019] The second embodiment differs from the first embodiment in that: The high end of the vertical connecting strut 4 is fixedly connected to the upper horizontal support beam 2, and the low end extends towards the lower horizontal support beam 3 and is stably connected to the lower horizontal support beam 3. This allows the vertical connecting strut 4 to transmit the force between the upper horizontal support beam 2 and the lower horizontal support beam 3 more evenly, further strengthening the linkage between the upper and lower horizontal supports. The lower end of the vertical connecting strut 4 extends towards the connection position between the lower transverse support beam 3 and the main through beam 1. A groove is also provided on the vertical connecting strut 4 at this position. The groove can avoid the connection position and prevent stress concentration at the electrical connection position. The longitudinal auxiliary rods 6 between multiple upper transverse support beams 2 are the same rod-shaped structure, that is, the longitudinal auxiliary rods 6 can continuously pass through multiple upper transverse support beams 2 along the length direction of the main through beam 1, which can more efficiently enhance the longitudinal integrity of the structure. Meanwhile, the longitudinal auxiliary rod 6 and the upper transverse support beam 2 are provided with interlocking slots. During assembly, the slots are used to achieve precise positioning before welding and fixing, which not only ensures the accuracy of the connection position, but also makes the connection stronger after welding.

[0020] The third embodiment differs from the first embodiment in that: The upper transverse support beam 2 has an I-shaped vertical cross section, which can improve the transverse bending strength and better bear and distribute the load above. The lower transverse support beam 3 has a door-shaped vertical cross section with the opening facing downwards. The upper transverse support beam 2 and the main through beam 1, as well as the lower transverse support beam 3 and the main through beam 1, are all fixed by welding. The welding connection can realize the rigid connection between the components, avoid loosening, and further improve the structural stability of the entire through beam. The facing surfaces of the upper transverse support beam 2 and the lower transverse support beam 3 are trapezoidal, and the trapezoidal surfaces extend toward the cavity between the upper and lower transverse support beams. The trapezoidal surface structure can increase the contact area with the vertical connecting strut 4, making the subsequent connection more stable. On the other hand, it can guide the stress in the cavity to be transferred to the main body of the component, reduce local stress concentration, and extend the service life of the structure. The multiple transverse support beams 2 are spaced at equal intervals along the length of the main through beam 1, and the intervals are controlled between 600-800mm. This equal distribution allows the load to be evenly distributed on the main through beam 1, avoiding stress concentration caused by excessive local support spacing.

[0021] Both the vertical connecting strut 4 and the diagonal reinforcing strut 5 have inverted "U" shaped cross sections. The distance between the two open sidewalls increases from the sealed end to the open end, forming an "outward-expanding" trapezoidal support structure. This allows the single large weight at the top to be transferred from top to bottom to the two smaller weights at the diagonal ends. Furthermore, the greater distance between the bottom ends of the vertical connecting strut 4 and the diagonal reinforcing strut 5 effectively separates and transfers the force to the lower transverse support beam 3 and the main through beam 1, providing better support. This disperses the force when it is transferred from the sealed end to the open end, reducing the risk of local stress concentration and further enhancing the load-bearing and deformation resistance of the struts.

[0022] 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 protection scope of the claims.

Claims

1. A semi-trailer main beam, comprising two parallel main beams (1), wherein a plurality of upper transverse support beams (2) are fixedly connected between the two main beams (1), and the upper transverse support beams (2) are perpendicular to the main beams (1), characterized in that: Multiple upper transverse support beams (2) are distributed at intervals along the length direction of the main through beam (1), and a lower transverse support beam (3) is connected between two main through beams (1). The lower transverse support beam (3) is located below the upper transverse support beam (2) and corresponds one-to-one with the upper transverse support beam (2). The lower transverse support beam (3) is connected to the upper transverse support beam (2) by vertical connecting struts (4) at both ends. The vertical connecting struts (4) are inclined and the high end of the vertical connecting struts (4) extends toward the middle section of the lower transverse support beam (3). A longitudinal auxiliary rod (6) is provided between two adjacent lower transverse support beams (3). An oblique reinforcing strut (5) is fixed between the longitudinal auxiliary rod (6) and the upper transverse support beam (2). The oblique reinforcing strut (5) has an angle with the horizontal direction of the lower transverse support beam (3).

2. A semi-trailer main beam through beam according to claim 1, characterized in that: The upper end of the vertical connecting strut (4) is fixedly connected to the upper transverse support beam (2), and the lower end of the vertical connecting strut (4) extends toward the end position of the lower transverse support beam (3) and is fixedly connected to the lower transverse support beam (3).

3. A semi-trailer main beam through beam according to claim 2, characterized in that: The lower end of the vertical connecting strut (4) extends toward the connection position with the main through beam (1) and the lower transverse support beam (3), and is provided with a groove corresponding to that position.

4. A semi-trailer main beam through beam according to claim 1, characterized in that: The longitudinal auxiliary rods (6) between the multiple upper transverse support beams (2) are of the same rod structure. The longitudinal auxiliary rods (6) and the upper transverse support beams (2) are provided with slots for mutual insertion and matching. The longitudinal auxiliary rods (6) and the upper transverse support beams (2) are welded together at the slot positions.

5. A semi-trailer main beam through beam according to claim 1, characterized in that: The upper transverse support beam (2) has an "I" shaped vertical section, and the lower transverse support beam (3) has a "door" shaped vertical section with the opening facing downwards. The upper transverse support beam (2) is welded and fixed to the main through beam (1), and the lower transverse support beam (3) is welded and fixed to the main through beam (1).

6. A semi-trailer main beam through beam according to claim 5, characterized in that: The opposing surfaces of the upper transverse support beam (2) and the lower transverse support beam (3) are trapezoidal, and the trapezoidal surfaces extend toward the cavity between the upper transverse support beam (2) and the lower transverse support beam (3).

7. A semi-trailer main beam through beam according to claim 5, characterized in that: The multiple upper transverse support beams (2) are spaced at equal intervals along the length of the main through beam (1), and the interval is 600-800mm.

8. A semi-trailer main beam through beam according to claim 1, characterized in that: The cross-sections of the vertical connecting strut (4) and the diagonal reinforcing strut (5) are inverted "U" shapes, and the distance between the two open sidewalls increases sequentially from their sealed end toward their open end.

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