Front cross beam connecting support, frame front end module and dumper
By designing the front cross beam connecting bracket with a plate-like structure, increasing the thickness of the main body and setting reinforcement and support ribs, the problem of insufficient structural strength of the front-end module of traditional cargo vehicles is solved, and higher structural strength and lightweight effect is achieved.
Patent Information
- Application Number
- CN202420891453.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-26
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-04-26
AI Technical Summary
The front-end module structure of traditional cargo vehicles is insufficient to effectively withstand the impact load generated during the self-dumping process.
A front cross beam connecting bracket is designed, including a main body part, a first connection part, a second connection part and a third connection part. The main body part is a plate-like structure, and the thickness increases along the direction of the first connection part to the second connection part, which enhances the local structural strength at the connection with the frame lengthening beam, and further strengthens the structural strength through reinforcement and support ribs.
By increasing the thickness of the main body and setting reinforcement and support ribs, the structural strength of the front cross beam connection bracket is significantly improved, and it can more effectively withstand the impact load generated during the self-dumping process, and at the same time, it is conducive to lightweight improvement while ensuring strength.
Smart Images
Figure CN222859565U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vehicle engineering, in particular to a front crossbeam connecting bracket, a frame front end module and a dump truck. Background Art
[0002] During the use of dump trucks, in addition to the loads that the frames of conventional cargo vehicles need to bear, the frames of dump trucks also need to bear the horizontal impact loads generated during the loading and unloading of dump trucks, especially during the dumping process. The impact loads ultimately act on the front end module of the frame. The front end module of traditional cargo vehicles directly connects the front cross beam body with the longitudinal beam or extension beam of the frame by welding. The structural strength of the heat affected zone of the weld is not enough to withstand the impact load for a long time and multiple times, and cannot meet the use requirements. Utility Model Content
[0003] The utility model aims to provide a front cross beam connecting bracket, a frame front end module and a dump truck, so as to solve the problem that the existing front cross beam connecting bracket is insufficient in structural strength and cannot withstand the impact load during the dumping process.
[0004] The utility model provides a front cross beam connecting bracket, which is used to connect the front cross beam body, the frame extension beam and the bumper bracket, and comprises a main body, a first connecting part, a second connecting part and a third connecting part. The main body is a plate-like structure. The first connecting part is fixedly connected to one end of the main body. The first connecting part is used to be fixedly connected to one end of the front cross beam body. The second connecting part is arranged at an end of the main body away from the first connecting part. The second connecting part is used to be fixedly connected to the frame extension beam. The third connecting part is arranged on one side of the main body. The third connecting part is used to be fixedly connected to the bumper bracket. The thickness of the main body increases along the direction from the first connecting part to the second connecting part.
[0005] As a preferred technical solution for the front crossbeam connecting bracket, the main body includes a first thickness plate and a second thickness plate, the first thickness plate and the second thickness plate are integrated, the thickness of the first thickness plate is less than the thickness of the second thickness plate, the first thickness plate and the second thickness plate are staggered in a stepped manner, the first connecting portion is fixedly connected to the first thickness plate, and the second connecting portion is arranged on the second thickness plate.
[0006] As a preferred technical solution for the front cross beam connecting bracket, reinforcing ribs are arranged at the intersection of the first thickness plate and the second thickness plate, and the reinforcing ribs, the first thickness plate and the second thickness plate are integrated.
[0007] As an optimal technical solution for the front cross beam connecting bracket, a support rib is further arranged between the first connecting part and the second connecting part. The support rib is integrated with the main part and fixedly connected to the first connecting part. Along the direction from the first connecting part to the second connecting part, the cross-section of the support rib and the main part is a hollow triangular structure.
[0008] As a preferred technical solution for the front cross beam connecting bracket, the second connecting portion includes a plurality of lengthened beam connecting holes, and the plurality of lengthened beam connecting holes are distributed at intervals along an edge of the main body away from the first connecting portion.
[0009] As a preferred technical solution for the front cross beam connecting bracket, the third connecting portion includes three bumper bracket connecting holes, and the three bumper bracket connecting holes are distributed in a triangular shape on one side of the main body.
[0010] As a preferred technical solution for the front cross beam connecting bracket, a weight-reducing groove is provided on one side of the main body where the third connecting portion is provided.
[0011] The utility model provides a front-end module of a vehicle frame, comprising a front cross beam body, two frame extension beams and two bumper brackets, and also comprising two front cross beam connecting brackets of any of the above schemes, wherein the first connecting parts of the two front cross beam connecting brackets are fixedly connected to the two ends of the front cross beam body, the two frame extension beams are respectively fixedly connected to the second connecting parts of the two front cross beam connecting brackets, and the two bumper brackets are respectively fixedly connected to the third connecting parts of the two front cross beam connecting brackets.
[0012] As a preferred technical solution for the front end module of the frame, the first connecting portion is provided with an annular step portion, the small end of the step portion is used to cooperate with the hole at one end of the front cross beam body, the large end of the step portion is provided with a chamfer, and the large end of the step portion is used to be welded and connected to the front cross beam body.
[0013] The utility model provides a dump truck, comprising a cargo box and a frame, wherein the cargo box is mounted on the frame, the frame comprising two longitudinal beams arranged in parallel and a plurality of cross beams distributed at intervals along the two longitudinal beams, the two ends of the cross beams being fixedly connected to the two longitudinal beams, and also comprising a frame front end module of the above scheme, wherein two frame extension beams are respectively fixedly connected to the two longitudinal beams.
[0014] The beneficial effects of the utility model are:
[0015] The utility model provides a front cross beam connecting bracket, wherein a first connecting part and a second connecting part are respectively fixedly connected to two ends of a main body, the first connecting part and the second connecting part are respectively connected to the front cross beam body and the frame extension beam, the main body of the plate-like structure has sufficient structural strength to bear the load, and the thickness of the main body is set to increase along the direction from the first connecting part to the second connecting part, that is, the main body is set to be a plate-like structure with variable thickness, which can further enhance the local structural strength of the connection with the frame extension beam on the one hand, and is conducive to lightweight improvement on the premise of ensuring the structural strength on the other hand. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a structural schematic diagram of the front end module of the frame in the embodiment of the utility model;
[0017] Figure 2 This is one of the structural schematic diagrams of the front crossbeam connecting bracket in the embodiment of the utility model at the first viewing angle;
[0018] Figure 3 This is a second structural schematic diagram of the front cross beam connecting bracket in the embodiment of the utility model at the first viewing angle;
[0019] Figure 4 This is one of the structural schematic diagrams of the front crossbeam connecting bracket in the embodiment of the utility model at a second viewing angle;
[0020] Figure 5 This is a second structural schematic diagram of the front cross beam connecting bracket in the embodiment of the utility model at a second viewing angle;
[0021] Figure 6 This is a front view of the front crossbeam connecting bracket in the embodiment of the utility model;
[0022] Figure 7 It is a side view of the front cross beam connecting bracket in the embodiment of the utility model.
[0023] In the figure:
[0024] 1. Front crossbeam connecting bracket; 2. Front crossbeam body; 3. Frame extension beam;
[0025] 10. Main body; 11. Reinforcement ribs; 12. First connection part; 13. Second connection part; 14. Third connection part; 15. Support ribs;
[0026] 101. First thickness plate; 102. Second thickness plate; 103. Weight reduction groove; 121. Step portion; 122. Through hole; 131. Extension beam connection hole; 141. Bumper bracket connection hole. DETAILED DESCRIPTION
[0027] The following will clearly and completely describe the technical solution of the utility model in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0028] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.
[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0031] For the convenience of explanation, the concept of vehicle coordinate system in the prior art is introduced here, and the front and rear direction of the vehicle is defined as the X-axis direction, the left and right direction of the vehicle is defined as the Y-axis direction, and the up and down direction of the vehicle is defined as the Z-axis direction. Further, the X-axis toward the front of the vehicle is defined as the positive direction of the X-axis, the Y-axis toward the left side of the vehicle is defined as the positive direction of the Y-axis, and the Z-axis toward the top of the vehicle is defined as the positive direction of the Z-axis.
[0032] like Figure 1As shown, the utility model provides a front-end frame module, including a front crossbeam body 2, a front crossbeam connecting bracket 1 and a frame extension beam 3. Two frame extension beams 3 are provided, namely a left frame extension beam and a right frame extension beam, and the left frame extension beam and the right frame extension beam are fixedly connected to the left frame longitudinal beam and the right frame longitudinal beam respectively. The left frame extension beam and the right frame extension beam are both fixedly connected to the front crossbeam body 2 through the front crossbeam connecting bracket 1. By providing the front crossbeam connecting bracket 1, the structural strength of the connection position between the frame extension beam 3 and the front crossbeam body 2 is ensured, so that the front-end frame module has higher structural strength and torsional stiffness, so as to withstand higher loads or impacts.
[0033] like Figure 1-Figure 7 As shown, this embodiment provides a front cross beam connecting bracket 1, which is used to connect the front cross beam body 2, the frame extension beam 3 and the bumper bracket (not shown in the figure). The front cross beam connecting bracket 1 includes a main body 10, a first connecting portion 12, a second connecting portion 13 and a third connecting portion 14. The main body 10 is a plate-like structure and the main body 10 is parallel to or coincides with the YZ plane of the vehicle. The first connecting portion 12 is located at one end of the main body 10 along the X-axis direction and is fixedly connected to the main body 10, and the connection method is integral casting or welding connection. The first connecting portion 12 is used to be fixedly connected to one end of the front cross beam body 2, and the connection method is preferably welding connection. The second connecting portion 13 is arranged at one end of the main body 10 away from the first connecting portion 12, that is, the second connecting portion 13 is arranged at the other end of the main body 10 along the X-axis direction. The second connecting portion 13 is used to be fixedly connected to the frame extension beam 3. The third connection part 14 is arranged on one side of the main body 10 along the Z-axis direction. The third connection part 14 is used to be fixedly connected to the bumper bracket. Correspondingly, the third connection part 14 can be arranged on the upper side or the lower side of the main body 10 along the Z-axis direction according to the installation height of the bumper. The thickness of the main body 10 increases along the direction from the first connection part 12 to the second connection part 13. The thickness of the main body 10 can be continuously increased or step-increased. In this embodiment, it is preferably a step-increase. By setting the first connection part 12 and the second connection part 13 to be fixedly connected to the two ends of the main body 10 respectively, the first connection part 12 and the second connection part 13 are respectively connected to the front cross beam body 2 and the frame extension beam 3, the main body 10 of the plate-like structure has sufficient structural strength to bear the load, and the thickness of the main body 10 is set to increase along the direction from the first connection part 12 to the second connection part 13, that is, the main body 10 is set to a plate-like structure with variable thickness, which can further enhance the local structural strength of the connection with the frame extension beam 3 on the one hand, and is conducive to lightweight improvement on the premise of ensuring structural strength on the other hand.
[0034] It should be noted that the above descriptions of the X-axis, Y-axis and Z-axis of the vehicle coordinate system are all made on the premise that the front cross beam connecting bracket 1 is installed. Due to the particularity of its installation position, the vehicle coordinate system in the prior art is used for auxiliary description, which is more conducive to explaining the structure of the front cross beam connecting bracket 1. At the same time, the vehicle coordinate system will continue to be used for auxiliary description below, and will not be repeated for the sake of brevity.
[0035] Furthermore, if Figure 2-Figure 7 As shown, the main body 10 includes a first thickness plate 101 and a second thickness plate 102, and the first thickness plate 101 and the second thickness plate 102 are integrally arranged, such as the first thickness plate 101 and the second thickness plate 102 are welded or integrally cast. The thickness of the first thickness plate 101 is less than the thickness of the second thickness plate 102. The first thickness plate 101 and the second thickness plate 102 are staggered in a stepped manner, so that the thickness of the main body 10 increases stepwise. The first connecting portion 12 is fixedly connected to the first thickness plate 101, and the second connecting portion 13 is arranged on the second thickness plate 102, so as to strengthen the local structural strength at the second connecting portion 13, and at the same time, achieve lightweighting under the premise of satisfying structural strength.
[0036] Specifically, Figure 2-Figure 7 As shown, the main body 10 is parallel to or coincides with the YZ plane, so its thickness direction is parallel to or coincides with the X-axis direction. Figure 4 and Figure 5 As shown, one side of the main body 10 is set as a plane, and the other side is a stepped surface, that is, one side of the first thickness plate 101 and the second thickness plate 102 are flush, and the other side is staggered. A reinforcing rib 11 is set at the intersection of the first thickness plate 101 and the second thickness plate 102. The reinforcing rib 11, the first thickness plate 101 and the second thickness plate 102 are integrated, and the positions where the reinforcing rib 11 is connected to the first thickness plate 101 and the second thickness plate 102 are chamfered to reduce stress concentration. By setting the reinforcing rib 11, the intersecting position of the first thickness plate 101 and the second thickness plate 102 can be smoothly transitioned, avoiding stress concentration at the intersecting position and causing damage, thereby further strengthening the structural strength of the front cross beam connecting bracket 1.
[0037] Specifically, Figure 4-Figure 7As shown, a support rib 15 is also provided between the first connection part 12 and the second connection part 13. The support rib 15 is provided on a side flush with the first thickness plate 101 and the second thickness plate 102, that is, the support rib 15 is provided on a side opposite to the reinforcing rib 11. The support rib 15 is provided integrally with the main body 10. The support rib 15 and the main body 10 can be connected by integral casting or welding, and a fillet is provided at the position where the support rib 15 and the main body 10 are connected to reduce stress concentration. The support rib 15 is fixedly connected to the first connection part 12, and the connection method is welding connection or integral molding connection. Along the direction from the first connection part 12 to the second connection part 13, the cross section of the support rib 15 and the main body 10 is a hollow triangular structure to improve lightness. By providing the support rib 15, on the one hand, comprehensive support is provided to the first connection part 12 to ensure the structural strength at the connection position of the first connection part 12 and the main body 10, and on the other hand, the reinforcing rib 11 and the support rib 15 work together to strengthen the structural strength of the front cross beam connecting bracket 1 along its thickness direction, that is, the structural strength in the X-axis direction is improved.
[0038] Furthermore, if Figure 2-Figure 6 As shown, the second connection part 13 includes a plurality of extension beam connection holes 131, which are spaced apart along the edge of the main body 10 away from the first connection part 12, and a connection hole is also provided at the corresponding position of the frame extension beam 3, and the two are fixedly connected by fasteners. The number of the extension beam connection holes 131 can be 2, 3, 4, 5, 6, 7 or 8. In this embodiment, the number of the extension beam connection holes 131 is preferably 4. The 4 extension beam connection holes 131 are divided into two groups, each group includes 2 extension beam connection holes 131 and are spaced apart and arranged at the upper and lower sides of the edge of the extension beam away from the first connection part 12, so as to further strengthen the structural strength of the connection position between the front cross beam connection bracket 1 and the frame extension beam 3. The extension beam connection hole 131 runs through the main body 10, and both ends thereof protrude from the surface of the main body 10 and are machined into a flat surface to ensure a close fit with the frame extension beam 3.
[0039] Further, the third connection portion 14 includes three bumper bracket connection holes 141, and the three bumper bracket connection holes 141 are distributed in a triangular shape on one side of the main body 10. In this embodiment, the third connection portion 14 is arranged on the upper side of the main body 10, and does not intersect with the extension beam connection hole 131 of the second connection portion 13 to avoid interference between the fastener and the installation tool during the installation process. In other embodiments, the third connection portion 14 can also be arranged on the lower side of the main body 10 according to the installation position of the bumper, and the structure of the main body 10 and the position of the second connection portion 13 can be adjusted accordingly. The bumper bracket connection hole 141 runs through the main body 10, and both ends thereof protrude from the surface of the main body 10 and are machined into a plane to ensure a close fit with the bumper bracket.
[0040] Optionally, two of the three bumper bracket connection holes 141 are arranged along the edge of the upper side of the main body 10. Since the bumper bracket is connected there, the load is relatively small. Therefore, a weight-reducing groove 103 is arranged on one side of the main body 10 where the third connection portion 14 is arranged, so as to reduce weight while satisfying the structural strength. Specifically, a weight-reducing groove 103 is arranged between two bumper bracket connection holes 141 arranged on the upper side edge of the main body 10 to reduce weight, while ensuring that the structural strength is sufficient for installing the bumper bracket.
[0041] The utility model provides a front-end frame module, including a front cross beam body 2, two frame extension beams 3, two bumper brackets and two front cross beam connecting brackets 1 in the above-mentioned embodiments. The length direction of the front cross beam body 2 is parallel to the Y-axis direction of the vehicle, and the first connecting parts 12 of the two front cross beam connecting brackets 1 are fixedly connected to the two ends of the front cross beam body 2. The two frame extension beams 3 are respectively fixedly connected to the second connecting parts 13 of the two front cross beam connecting brackets 1, and the connection method is preferably bolt connection. The two bumper brackets are respectively fixedly connected to the third connecting parts 14 of the two front cross beam connecting brackets 1, and the connection method is preferably bolt connection. By providing the front cross beam connecting bracket 1 in this embodiment, the structural strength and torsional rigidity of the frame front-end module are strengthened, and at the same time, it is conducive to lightweight improvement.
[0042] Specifically, the first connecting portion 12 is provided with an annular step portion 121, and a through hole 122 is provided in the center thereof to improve the lightweight. The outer diameter of the small end of the step portion 121 can meet the hole diameter of the end of the front cross beam body 2 to meet the hole-axis matching, that is, the small end of the step portion 121 is used to match the hole at one end of the front cross beam body 2. The large end of the step portion 121 is provided with a chamfer, and the large end of the step portion 121 is used to be welded and connected with the front cross beam body 2. When the small end of the step portion 121 is matched with the front cross beam body 2, the large end of the step portion 121 is flush with the outer surface of the front cross beam body 2, and the welding is performed at the contact position between the two. Since the large end of the step portion 121 is provided with a chamfer, the weld between the front cross beam body 2 and the front cross beam connecting bracket 1 is a Y-shaped weld or a V-shaped weld, which has better mechanical properties and higher structural strength at the welded joint. It should be pointed out that the structural shape of the step portion 121 in this embodiment is determined according to the shape of the hole at one end of the front cross beam body 2, and should not be limited to a ring shape. If the hole at one end of the front cross beam body 2 is set as a square hole, the step portion 121 is correspondingly set as a square step portion 121 .
[0043] The utility model provides a dump truck, including a cargo box and a frame, wherein the cargo box is mounted on the frame. The frame includes two longitudinal beams arranged in parallel and a plurality of cross beams spaced apart along the two longitudinal beams, and the two ends of the cross beams are fixedly connected to the two longitudinal beams. The utility model also includes a frame front end module in the present embodiment, and two frame extension beams 3 are fixedly connected to the two longitudinal beams, respectively. By setting the frame front end module in the present embodiment, the structural strength and torsional rigidity of the frame are better, and the relative displacement of the two longitudinal beams is smaller, thereby meeting the use requirements of the dump truck.
[0044] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.
Claims
1. A front cross beam connecting bracket, used to connect the front cross beam body (2), the frame extension beam (3) and the bumper bracket, characterized in that: include: A main body (10), wherein the main body (10) is a plate-shaped structure; A first connecting portion (12), the first connecting portion (12) being fixedly connected to one end of the main body (10), the first connecting portion (12) being used for being fixedly connected to one end of the front cross beam body (2); A second connecting portion (13), the second connecting portion (13) being arranged at an end of the main body (10) away from the first connecting portion (12), the second connecting portion (13) being used for being fixedly connected to the vehicle frame extension beam (3); A third connecting portion (14), the third connecting portion (14) being arranged on one side of the main body (10), the third connecting portion (14) being used for being fixedly connected to the bumper bracket; The thickness of the main body (10) increases along the direction from the first connecting portion (12) to the second connecting portion (13).
2. The front cross beam connecting bracket according to claim 1, characterized in that: The main body (10) comprises a first thickness plate (101) and a second thickness plate (102); the first thickness plate (101) and the second thickness plate (102) are integrally arranged; the thickness of the first thickness plate (101) is smaller than the thickness of the second thickness plate (102); the first thickness plate (101) and the second thickness plate (102) are staggered in a stepped manner; the first connecting portion (12) is fixedly connected to the first thickness plate (101); and the second connecting portion (13) is arranged on the second thickness plate (102).
3. The front cross beam connecting bracket according to claim 2, characterized in that: A reinforcing rib (11) is provided at the intersection of the first thickness plate (101) and the second thickness plate (102); the reinforcing rib (11), the first thickness plate (101) and the second thickness plate (102) are integrally arranged.
4. The front cross beam connecting bracket according to claim 1, characterized in that: A support rib (15) is further provided between the first connecting portion (12) and the second connecting portion (13); the support rib (15) is integrally provided with the main body (10); the support rib (15) is fixedly connected to the first connecting portion (12); and along the direction from the first connecting portion (12) to the second connecting portion (13), the cross-section of the support rib (15) and the main body (10) is a hollow triangular structure.
5. The front cross beam connecting bracket according to claim 1, characterized in that: The second connection portion (13) comprises a plurality of lengthened beam connection holes (131), and the plurality of lengthened beam connection holes (131) are distributed at intervals along an edge of the main body portion (10) away from the first connection portion (12).
6. The front cross beam connecting bracket according to claim 1, characterized in that: The third connection portion (14) comprises three bumper bracket connection holes (141), and the three bumper bracket connection holes (141) are distributed in a triangular shape on one side of the main body (10).
7. The front cross beam connecting bracket according to any one of claims 1 to 6, characterized in that: A weight-reducing groove (103) is provided on one side of the main body (10) where the third connecting portion (14) is provided.
8. A vehicle frame front end module, comprising a front cross beam body (2), two frame extension beams (3) and two bumper brackets, characterized in that: It also includes two front cross beam connecting brackets (1) as described in any one of claims 1 to 7, the first connecting portions (12) of the two front cross beam connecting brackets (1) are fixedly connected to the two ends of the front cross beam body (2), the two frame extension beams (3) are respectively fixedly connected to the second connecting portions (13) of the two front cross beam connecting brackets (1), and the two bumper brackets are respectively fixedly connected to the third connecting portions (14) of the two front cross beam connecting brackets (1).
9. The vehicle frame front end module according to claim 8, characterized in that: The first connecting portion (12) is provided with an annular step portion (121), the small end of the step portion (121) is used to cooperate with a hole at one end of the front cross beam body (2), the large end of the step portion (121) is provided with a chamfer, and the large end of the step portion (121) is used to be welded to the front cross beam body (2).
10. A dump truck, comprising a cargo box and a frame, wherein the cargo box is mounted on the frame, the frame comprising two longitudinal beams arranged in parallel and a plurality of cross beams spaced apart along the two longitudinal beams, the two ends of the cross beam being fixedly connected to the two longitudinal beams, characterized in that: It also comprises the frame front end module according to any one of claims 8 to 9, wherein the two frame extension beams (3) are respectively fixedly connected to the two longitudinal beams.