Suspension cross member assembly and method of designing a match

Abstract

The present application relates to the technical field of automobile suspension cross beam assembly, and provides a suspension cross beam assembly and a design matching method thereof, wherein the suspension cross beam assembly comprises at least two cross beams, a first connecting support, a second connecting support and a plurality of first connecting pieces, the cross beam is provided in a sheet shape, the at least two cross beams are arranged side by side along a first direction, and the cross beam is provided with a first connecting hole and a second connecting hole at two ends along the first direction; the first connecting support is arranged at one end of the cross beam along the first direction, the second connecting support is arranged at the other end of the cross beam along the first direction, the first connecting support is provided with a plurality of first fixing holes, and the second connecting support is provided with a plurality of second fixing holes; and the plurality of first connecting pieces are respectively arranged between the first connecting hole and the first fixing hole and between the second connecting hole and the second fixing hole, so as to fixedly connect the first connecting support and the second connecting support to the two ends of the cross beam respectively. The suspension cross beam assembly structure is easy to maintain and simple and reliable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile suspension cross beam assembly, and particularly to a suspension cross beam assembly and a design matching method thereof. BACKGROUND

[0002] The main function of the heavy dump truck leaf spring support is to fix the leaf spring and transmit the force from the leaf spring to the frame assembly. The load bearing is large and complex, especially for the leaf spring combination support in the double front axle suspension system, which simultaneously bears the force from the front axle and rear axle leaf springs. In order to improve the stress state of the leaf spring support and improve the durability of the leaf spring combination support, the left and right leaf spring supports are generally connected together by the suspension cross beam.

[0003] At present, the suspension cross beam assembly is welded together by a bottom plate, a stamped beam, a connecting plate and a support plate, which has a complex structure and high cost. In actual use, the suspension cross beam assembly is prone to fracture, which seriously affects the vehicle availability and causes unpredictable risks to the running vehicle. Through analysis, the above-mentioned failure is due to the fact that the current suspension cross beam assembly is not suitable for the complex torsion working condition of the dump truck. SUMMARY

[0004] The present application provides a suspension cross beam assembly and a design matching method thereof, which solves the defects that the suspension cross beam assembly in the prior art is prone to fracture in actual use, which seriously affects the vehicle availability and causes unpredictable risks to the running vehicle. The suspension cross beam assembly structure is easy to maintain, simple and reliable.

[0005] The present application provides a suspension cross beam assembly, which comprises:

[0006] At least two cross beams, the cross beams are arranged in a sheet shape, and the at least two cross beams are arranged side by side along a first direction, and the two ends of the cross beam along the first direction are respectively provided with a first connecting hole and a second connecting hole;

[0007] A first connecting support and a second connecting support, the first connecting support is arranged at one end of the cross beam along the first direction, and the second connecting support is arranged at the other end of the cross beam along the first direction, the first connecting support is provided with a plurality of first fixing holes, and the second connecting support is provided with a plurality of second fixing holes;

[0008] A plurality of first connecting pieces, the plurality of first connecting pieces are respectively arranged between the first connecting hole and the first fixing hole and the second connecting hole and the second fixing hole, so as to fixedly connect the first connecting support and the second connecting support to the two ends of the cross beam.

[0009] According to the suspension crossbeam assembly provided by the application, the first connecting support or the second connecting support comprises a base and two connecting arms, the two connecting arms are arranged on two sides of the base and are bent towards one side of the crossbeam, and a plurality of first fixing holes or a plurality of second fixing holes are arranged on the two connecting arms in pairs.

[0010] According to the suspension crossbeam assembly provided by the application, a plurality of mounting holes are arranged on the base, and the base is connected to the left leaf spring combined support or the right leaf spring combined support through the second connecting piece.

[0011] According to the suspension crossbeam assembly provided by the application, a process round hole is arranged in the middle of the base.

[0012] According to the suspension crossbeam assembly provided by the application, the crossbeam is in the shape of a gold ingot with high ends and a low middle.

[0013] According to the suspension crossbeam assembly provided by the application, the first connecting hole and the second connecting hole are elliptical holes, and the long axis of the elliptical hole extends in the first direction.

[0014] According to the suspension crossbeam assembly provided by the application, the first connecting support and the second connecting support are made of a metal material with a fracture elongation of greater than 15%.

[0015] According to the suspension crossbeam assembly provided by the application, the thickness of the first connecting support and the second connecting support is 1.5 times the thickness of the crossbeam.

[0016] The application further provides a design matching method of a suspension crossbeam assembly, which is applied to the suspension crossbeam assembly, and the torsional specific stress of the front crossbeam is , the torsional specific stress of the suspension crossbeam assembly is , and the torsional specific stress of the third crossbeam of the vehicle frame is ; and the torsional specific stress between the front crossbeam, the suspension crossbeam assembly and the third crossbeam of the vehicle frame is ;

[0017] The bending specific stress of the front crossbeam is , the bending specific stress of the suspension crossbeam assembly is , and the bending specific stress of the third crossbeam of the vehicle frame is ; and the bending specific stress between the front crossbeam, the suspension crossbeam assembly and the third crossbeam of the vehicle frame is ;

[0018] According to the design matching method of the suspension crossbeam assembly, the torsional specific stress of the crossbeam is defined as ; the bending ratio stress of the cross beam is defined as ;

[0019] In the formula: is the torsional stress of the frame cross beam; is the bending stress of the frame cross beam; is the end torque of the frame cross beam; is the torsional section modulus of the frame cross beam; is the torsional angle under the action of the end torque T of the frame cross beam; is the bending moment of the frame cross beam; is the bending section modulus of the frame cross beam; is the end load of the frame cross beam; is the width of the frame cross beam; is the displacement under the action of the end load F of the frame.

[0020] The suspension cross beam assembly and the design matching method thereof provided by the present application are characterized in that two ends of two cross beams are assembled together with the first connecting support and the second connecting support through the connecting piece to form the suspension cross beam assembly. Since the suspension cross beam assembly is assembled in the form of the connecting piece, the complicated tailor-welding process is avoided, and the overall structure of the suspension cross beam assembly is a sheet-shaped cross beam, which appropriately releases the torsional stiffness of the several-shaped structure, is more conducive to the torsional deformation of the frame assembly, and makes the maximum stress of the suspension cross beam assembly decrease from 418 MPa to 209 MPa, and the stress distribution of the suspension cross beam assembly is greatly improved. Meanwhile, the suspension cross beam assembly has the advantages of simple structure, high reliability and easy maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0022] Figure 1 is the front suspension assembly arrangement provided by the present application.

[0023] Figure 2 is the structure schematic diagram of the suspension cross beam assembly provided by the present application.

[0024] Figure 3 is the structure schematic diagram of the first connecting support or the second connecting support in Figure 2

[0025] is the structure schematic diagram of the cross beam in Figure 4 Figure 2

[0026] ​​Figure 5 The vehicle frame assembly is provided by the present application.

[0027] Figure 6 The vehicle frame assembly torsional deformation schematic diagram is provided by the present application.

[0028] Figure 7 The vehicle frame stress distribution nephogram is provided by the present application, wherein a is after improvement, and b is before improvement.

[0029] Reference signs:

[0030] 1, left leaf spring combined support;

[0031] 2, right leaf spring combined support;

[0032] 3, suspension cross beam assembly; 31, first connecting support; 32, second connecting support; 33, base; 331, mounting hole; 332, assembly process round hole; 34, connecting arm; 341, first fixing hole; 342, second fixing hole; 35, cross beam; 351, first connecting hole; 352, second connecting hole; 353, lightening hole; 36, first connecting piece;

[0033] 4, front cross beam;

[0034] 5, vehicle frame three cross beams. DETAILED DESCRIPTION

[0035] The embodiments of the present application will be further described in detail below with reference to the drawings and examples. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0036] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", "third" are only used for description purposes, and cannot be understood as indicating or implying relative importance.

[0037] In the description of the embodiments of the present application, it should be noted that unless specifically defined and limited otherwise, the terms "connected", "connected to", "connection" should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0038] In the embodiments of the present application, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature, which can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature can be above, above and above the second feature, which can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature can be below, below and below the second feature, which can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0039] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0040] The suspension beam assembly and the design matching method provided by the embodiments of the present application will be described in detail below in combination with specific embodiments and application scenarios. Figures 1 to 7

[0041] In the embodiments of the present application, as Figures 1 to 4 ​As shown, the suspension cross beam assembly 3 includes at least two cross beams 35, a first connecting bracket 31 and a second connecting bracket 32, and a plurality of first connecting members 36. The cross beams 35 are arranged in a sheet shape, and at least two cross beams 35 are arranged side by side along a first direction. The two ends of the cross beams 35 along the first direction are respectively provided with a first connecting hole 351 and a second connecting hole 352. The first connecting bracket 31 is arranged at one end of the cross beams 35 along the first direction, and the second connecting bracket 32 is arranged at the other end of the cross beams 35 along the first direction. The first connecting bracket 31 is provided with a plurality of first fixing holes 341, and the second connecting bracket 32 is provided with a plurality of second fixing holes 342. The plurality of first connecting members 36 are respectively arranged between the first connecting hole 351 and the first fixing hole 341, and between the second connecting hole 352 and the second fixing hole 342, so as to fixedly connect the first connecting bracket 31 and the second connecting bracket 32 to the two ends of the cross beams 35 respectively.

[0042] The cross beams 35 are the main load-bearing components of the suspension cross beam assembly 3. At least two cross beams 35 are arranged side by side along the first direction, which not only enhances the overall strength and rigidity of the structure, but also better disperses and bears the load from the vehicle frame. The arrangement of a plurality of cross beams 35 enables the assembly to better adapt to complex stress environments, improving the stability and durability of the suspension system.

[0043] The sheet-shaped cross beams 35 have lighter weight and better flexibility compared to the traditional U-shaped or box-shaped structure. This helps to release the torsional stiffness of the suspension system, enabling the vehicle frame assembly to better deform under torsional load, thereby improving the driving stability and ride comfort of the vehicle. In addition, the sheet-shaped cross beams 35 are also easier to process and manufacture, reducing production costs.

[0044] The two ends of the cross beams 35 along the first direction are respectively provided with a first connecting hole 351 and a second connecting hole 352. The connecting holes are arranged for fixed connection with the connecting brackets and connecting members. The first connecting hole 351 and the second connecting hole 352 are respectively located at the two ends of the cross beams 35, ensuring that the connecting brackets can be firmly fixed on the cross beams 35. This makes the structure of the suspension cross beam assembly 3 more compact and stable, and can bear greater load and impact force.

[0045] The first connecting bracket 31 and the second connecting bracket 32 are connecting components between the suspension cross beam assembly 3 and the vehicle frame assembly. The first connecting bracket 31 and the second connecting bracket 32 are respectively arranged at the two ends of the cross beams 35, serving to support and fix the cross beams 35. The connecting brackets are provided with a plurality of fixing holes for cooperation with the connecting members, achieving firm connection with the cross beams 35. This design enhances the connection strength between the suspension cross beam assembly 3 and the vehicle frame assembly, improving the stability and safety of the whole vehicle.

[0046] A plurality of first fixing holes 341 and second fixing holes 342 are respectively provided on the first connecting bracket 31 and the second connecting bracket 32. The fixing holes are provided to cooperate with the connecting pieces to achieve the fixed connection between the connecting bracket and the cross beam 35. The design of multiple fixing holes makes the connection more flexible and reliable, and can adapt to different installation requirements and stress environments. At the same time, the fixing holes also play a positioning role, ensuring that the connecting bracket can be accurately installed on the cross beam 35.

[0047] A plurality of first connecting pieces 36 are respectively arranged between the first connecting holes 351 and the first fixing holes 341 and the second connecting holes 352 and the second fixing holes 342. The connecting pieces are the key components for connecting the cross beam 35 and the connecting bracket in the suspension cross beam assembly 3. Multiple connecting pieces are respectively arranged between the connecting holes and the fixing holes, and the connecting bracket is firmly fixed on the cross beam 35 through the fastening effect. This connection method is not only simple and reliable, but also easy to disassemble and replace, reducing maintenance costs. At the same time, the connecting pieces also play a role in transmitting load and dispersing stress, improving the overall load-carrying capacity and durability of the suspension cross beam assembly 3.

[0048] The suspension cross beam assembly 3 is assembled by connecting the two ends of the cross beam 35 through the connecting pieces and the first connecting bracket 31 and the second connecting bracket 32. Since the suspension cross beam assembly 3 is assembled in the form of connecting pieces, the complex tailor-welding process is avoided. The overall structure of the suspension cross beam assembly 3 is a sheet-shaped cross beam 35, which appropriately releases the torsional stiffness of the character-shaped structure, is more conducive to the torsional deformation of the frame assembly, reduces the maximum stress of the suspension cross beam assembly 3 from 418 MPa to 209 MPa, and greatly improves the stress distribution of the suspension cross beam assembly 3. At the same time, the structure of the suspension cross beam assembly 3 is simple, reliable, and easy to maintain.

[0049] Referring to Figure 2 and Figure 3 , according to the suspension cross beam assembly 3 provided by the present application, the first connecting bracket 31 or the second connecting bracket 32 includes a base 33 and two connecting arms 34. The two connecting arms 34 are respectively arranged on the two sides of the base 33 and are bent towards the side of the cross beam 35. A plurality of first fixing holes 341 or a plurality of second fixing holes 342 are respectively arranged on the two connecting arms 34.

[0050] It can be understood that the first connecting bracket 31 or the second connecting bracket 32 includes a base 33 and two connecting arms 34, which increases the stability and strength of the connecting bracket. The base 33 provides a solid foundation, and the connecting arms 34 are used to connect the cross beam 35 to form a stable support structure. The design of the base 33 and the connecting arms 34 enables the connecting bracket to better withstand the force and torque from the cross beam 35.

[0051] Two connecting arms 34 are arranged on both sides of the base 33, and are bent towards one side of the cross beam 35. The bent connecting arms 34 are designed to better adapt to the shape and position of the cross beam 35, while providing uniform force distribution and reducing local stress concentration. The bent design allows the connecting arms 34 to closely fit the cross beam 35, improving the stability of the connection.

[0052] A plurality of first fixing holes 341 or a plurality of second fixing holes 342 are symmetrically arranged on both connecting arms 34. The symmetrically distributed fixing holes ensure uniform distribution of the connecting members, thereby providing uniform force transmission and better load dispersion. The symmetric design helps to balance the stress on both ends of the cross beam 35, reducing distortion or deformation caused by improper assembly.

[0053] Referring to Figure 3 , according to the suspension cross beam assembly 3 provided by the present application, a plurality of mounting holes 331 are formed in the base 33. The base 33 is connected to the left leaf spring combined bracket 1 or the right leaf spring combined bracket 2 by the second connecting member passing through the mounting hole 331.

[0054] It can be understood that the mounting holes 331 are formed in the base 33, and their position and number are determined according to the specific design and installation requirements of the suspension cross beam assembly 3. Generally, these holes are evenly distributed on the base 33 to ensure that the connecting members are evenly distributed, thereby providing stable connection. The shape and size of the mounting hole 331 are matched with the second connecting member used, to ensure that the connecting member can smoothly pass through the hole and be firmly connected with the leaf spring combined bracket. Common shapes include circular, oval or square, etc., and the size is determined according to the specifications of the connecting member.

[0055] The second connecting member (such as a bolt, nut, rivet, etc.) passes through the mounting hole 331 to connect the suspension cross beam assembly 3 with the left leaf spring combined bracket 1 or the right leaf spring combined bracket 2. This connection method is not only simple and reliable, but also easy to disassemble and replace, facilitating maintenance and repair. The second connecting member also plays a role in transmitting load. When the vehicle is running, the suspension cross beam assembly 3 will be subjected to various forces and vibrations from the road. These forces and vibrations are transmitted to the leaf spring combined bracket through the second connecting member, and then dispersed to other parts of the vehicle frame to ensure the stability and safety of the vehicle.

[0056] Referring to Figure 3 , according to the suspension cross beam assembly 3 provided by the present application, a process round hole 332 is formed in the middle of the base 33.

[0057] It can be understood that the design of the assembly process round hole 332 is mainly used to facilitate the disassembly and assembly of key components (such as the leaf spring pin) in the leaf spring combined support, thereby simplifying the entire assembly and maintenance process. The assembly process round hole 332 provides additional operating space for the operator, making it more convenient to install or disassemble the leaf spring combined support. For example, when installing the leaf spring pin, the round hole can be used to more easily align and insert the pin, reducing the difficulty of assembly.

[0058] Referring to Figure 2 and Figure 4 , according to the suspension cross beam assembly 3 provided by the present application, the cross beam 35 is in a gold ingot type with high ends and a low middle.

[0059] It can be understood that the gold ingot type design makes the middle part of the cross beam 35 lower, which can reserve enough space for the middle position of the vehicle frame to facilitate the arrangement of key components such as the transmission and the drive shaft. This design is particularly suitable for vehicles such as heavy dump trucks that require complex chassis layout. By reasonably utilizing the chassis space, the gold ingot type cross beam 35 can achieve the best functional layout in limited space, avoiding interference with other components and improving the overall design efficiency of the vehicle.

[0060] The gold ingot type design effectively disperses the forces from the leaf spring and other loads by changing the cross-sectional shape of the cross beam 35, reducing the local stress concentration phenomenon. Especially under complex working conditions, reasonable stress distribution can significantly prolong the service life of the cross beam 35. By optimizing the stress distribution, the gold ingot type cross beam 35 can reduce the risk of material fatigue, improve the durability and reliability of the overall structure, and reduce the fracture failure caused by stress concentration.

[0061] Referring to Figure 4 , according to the suspension cross beam assembly 3 provided by the present application, the first connecting hole 351 and the second connecting hole 352 are elliptical holes, wherein the major axis of the elliptical hole extends along the first direction.

[0062] It can be understood that the middle part of the cross beam 35 is symmetrically arranged with multiple circular weight reduction holes 353. The two end mounting holes 331 of the cross beam 35 are long elliptical holes, which are used to adjust the transverse distance tolerance of the left leaf spring combined support 1 and the right leaf spring combined support 2 installation, avoiding the pre-stress of the suspension cross beam assembly 3 during assembly, affecting the reliability of the suspension cross beam assembly 3.

[0063] In an embodiment, the first connecting bracket 31 and the second connecting bracket 32 are made of a metal material with a fracture elongation greater than 15%.

[0064] It can be understood that the breaking elongation (also known as the breaking elongation) refers to the maximum plastic deformation capacity of the material before breaking in the tensile test, usually expressed in percentage. The higher the breaking elongation, the better the toughness of the material, which can absorb more energy without brittle fracture. The material with breaking elongation greater than 15% has high toughness and ductility, which can absorb more energy when subjected to impact or load, reducing the risk of fracture.

[0065] The metal material with breaking elongation greater than 15% is selected to ensure that the connecting bracket has sufficient strength and toughness to meet the needs of practical applications, taking into account the influence of static load and dynamic load. Through reasonable material selection, not only the performance of the connecting bracket is improved, but also the overall performance and reliability of the entire suspension system are improved.

[0066] In an embodiment, the thickness of the first connecting bracket 31 and the second connecting bracket 32 is 1.5 times the thickness of the cross beam 35.

[0067] It can be understood that the connecting bracket serves as the connection point between the suspension cross beam assembly 3 and the frame or other components, and bears forces and moments from multiple directions. By increasing the thickness of the connecting bracket, its load-bearing capacity can be significantly improved, thereby enhancing the overall structural strength of the suspension cross beam assembly 3.

[0068] During long-term driving, the suspension system will experience frequent vibrations, impacts and load changes. Thicker connecting brackets can better resist the influence of these factors, reducing cracks and deformations caused by fatigue, thereby improving the durability of the suspension cross beam assembly 3.

[0069] By reasonably designing the thickness ratio between the connecting bracket and the cross beam 35, the stress distribution inside the suspension system can be optimized. Thicker connecting brackets can better disperse and transmit forces from the frame or other components, reducing local stress concentration phenomena, thereby prolonging the service life of the suspension cross beam assembly 3.

[0070] Referring to Figures 5 to 7 , the present application also provides a design matching method for a suspension cross beam assembly 3, which is applied to the above-mentioned suspension cross beam assembly 3, the torsional specific stress of the front cross beam 4 is , the torsional specific stress of the suspension cross beam assembly 3 is , and the torsional specific stress of the frame three cross beam 5 is ; the torsional specific stress between the front cross beam 4, the suspension cross beam assembly 3 and the frame three cross beam 5 is ;

[0071] The bending specific stress of the front cross beam 4 is , the bending specific stress of the suspension cross beam assembly 3 is , and the bending specific stress of the frame three cross beam 5 is ; the bending ratio stress between the front cross beam 4, the suspension cross beam assembly 3 and the three cross beams 5 of the frame is .

[0072] Further, the torsion ratio stress of the cross beam is defined as ; the bending ratio stress of the cross beam is defined as ;

[0073] In the formula, is the torsion stress of the cross beam of the frame; is the bending stress of the cross beam of the frame; is the end torque of the cross beam of the frame; is the torsion section modulus of the cross beam of the frame; is the torsion angle under the end torque T of the cross beam of the frame; is the bending moment of the cross beam of the frame; is the bending section modulus of the cross beam of the frame; is the end load of the cross beam of the frame; is the width of the cross beam of the frame; is the displacement under the end load F of the cross beam of the frame.

[0074] The present application matches the cross beam from the perspective of the ratio stress, effectively improves the stress distribution of the cross beam, and provides effective theoretical support for the positive research and development design of the product.

[0075] Specifically, the torsion ratio stress of the front cross beam 4, the suspension cross beam assembly 3 and the three cross beams 5 of the frame satisfies the following conditions , and the bending ratio stress satisfies the following conditions . The torsion ratio stress of the front cross beam 4, the suspension cross beam assembly 3 and the three cross beams 5 of the frame is , and , and the bending ratio stress of the front cross beam 4, the suspension cross beam assembly 3 and the three cross beams 5 of the frame is , and .

[0076] The torsion ratio stress of the cross beam is defined as , and the bending ratio stress of the cross beam is defined as ; wherein, is the torsion stress of the cross beam of the frame; is the bending stress of the cross beam of the frame; is the end torque of the cross beam of the frame; is the torsion section modulus of the cross beam of the frame; is the torsion angle under the end torque T of the cross beam of the frame; is the bending moment of the cross beam of the frame; is the bending section modulus of the cross beam of the frame; The end load of the frame cross beam; The width of the frame cross beam; The displacement under the end load F of the frame.

[0077] The torsional specific stress of the frame cross beam represents the stress generated by the unit torsional deformation of the frame cross beam, and the bending specific stress of the frame cross beam represents the stress generated by the unit bending deformation of the frame cross beam. The torsional specific stress of the frame cross beam and the bending specific stress of the frame cross beam are only related to the shape and size of the cross section of the frame cross beam. Since the frame cross beam is a variable cross section, the direct calculation of the above-mentioned torsional specific stress of the frame and the bending specific stress of the frame is relatively complex, and the finite element software can be used for calculation in combination with the formula. The calculation results of the torsional specific stress of the frame cross beam and the bending specific stress of the frame cross beam of the present scheme are shown in Table 1.

[0078] Table 1 is the calculation results of the specific stress of the cross beam

[0079]

[0080] Specifically, the design matching principle of the torsional specific stress and the cross beam bending specific stress is as follows: for a heavy dump truck, the diagonal torsional deformation of the longitudinal beams on both sides of the frame assembly will occur; the cross beam (such as the front cross beam 4, the suspension cross beam assembly 3, and the frame three cross beam 5) connecting the two longitudinal beams of the frame will be deformed in torsion and bending under the driving of the longitudinal beams. At this time, the end displacement change of the front cross beam 4 is h1, the end displacement change of the suspension cross beam assembly 3 is h2, and the end displacement change of the frame three cross beam 5 is h3; the end displacement change h1> h2> h3 is obtained from the deformation displacement coordination relationship of the frame; in order to ensure the uniform distribution of the stress of the frame cross beam and avoid the problem of excessive local stress of a certain cross beam in the diagonal torsional deformation of the longitudinal beam, the torsional specific stress of each cross beam and the cross beam bending specific stress need to satisfy the above relationship.

[0081] Referring to Figure 7 , the frame assembly, a finite element model under the condition of the composite torsion working condition of the frame is established, and the simulation results can show that the maximum stress of the suspension cross beam assembly 3a of the present scheme is 209 MPa, the maximum stress of the original suspension cross beam assembly 3b (initial structure) is 418 MPa, and the safety factor of the suspension cross beam assembly 3 is increased to 1.5; and the stress distribution of the suspension cross beam assembly 3 is greatly improved.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A design matching method for a suspension crossbeam assembly, applied to a suspension crossbeam assembly, characterized in that, The front crossbeam is located at the end of the longitudinal beam relative to the three crossbeams of the frame, and the suspension crossbeam assembly is located between the front crossbeam and the three crossbeams of the frame; The torsional stress of the front crossbeam is The torsional stress of the suspension beam assembly is The torsional stress ratio of the three crossbeams of the frame is The torsional stress ratio among the front crossbeam, the suspension crossbeam assembly, and the three crossbeams of the frame is then... ; The bending stress of the front crossbeam is The bending stress of the suspension beam assembly is The bending stress of the three crossbeams of the frame is The bending stress ratio among the front crossbeam, suspension crossbeam assembly, and the three crossbeams of the frame is then... ; The torsional stress of the beam is defined as follows: The bending specific stress of the beam is defined as follows: ; In the formula: This refers to the torsional stress of the crossbeam of the vehicle frame; This refers to the bending stress of the crossbeam of the vehicle frame; This refers to the end torque of the crossbeam of the vehicle frame; This is the torsional section modulus of the crossbeam of the vehicle frame; The torsional angle at the end of the frame crossbeam under the action of torque T; The bending moment of the frame crossbeam; This refers to the bending section modulus of the crossbeam of the vehicle frame; This refers to the load at the end of the frame crossbeam; This refers to the width of the frame crossbeam; This represents the displacement at the end of the frame under load F. A suspension crossbeam assembly, comprising: At least two crossbeams are provided, the crossbeams are arranged in a sheet-like manner, the at least two crossbeams are arranged side by side along a first direction, and the two ends of the crossbeams along the first direction are respectively provided with a first connecting hole and a second connecting hole; A first connecting bracket and a second connecting bracket are provided. The first connecting bracket is located at one end of the crossbeam along a first direction, and the second connecting bracket is located at the other end of the crossbeam along the first direction. The first connecting bracket has a plurality of first fixing holes, and the second connecting bracket has a plurality of second fixing holes. Multiple first connectors are respectively inserted between the first connecting hole and the first fixing hole, as well as between the second connecting hole and the second fixing hole, to fix the first connecting bracket and the second connecting bracket to the two ends of the crossbeam respectively.

2. The suspension beam assembly according to claim 1, characterized in that, Both the first connecting bracket and the second connecting bracket include a base and two connecting arms. The two connecting arms are respectively disposed on both sides of the base and bent toward one side of the crossbeam. A plurality of first fixing holes or a plurality of second fixing holes are symmetrically disposed in pairs on the two connecting arms.

3. The suspension beam assembly according to claim 2, characterized in that, The base has multiple mounting holes, and the base passes through the mounting holes via a second connector to connect the suspension beam assembly to the left leaf spring assembly bracket or the right leaf spring assembly bracket.

4. The suspension beam assembly according to claim 3, characterized in that, The base has a circular hole for assembly processes in the middle.

5. The suspension beam assembly according to any one of claims 1-4, characterized in that, The crossbeam is shaped like an ingot, with high ends and low middle.

6. The suspension beam assembly according to claim 5, characterized in that, The first connecting hole and the second connecting hole are elliptical holes, wherein the major axis of the elliptical hole extends along a first direction.

7. The suspension beam assembly according to any one of claims 1-4, characterized in that, The first connecting bracket and the second connecting bracket are made of a metal material with an elongation at break of more than 15%.

8. The suspension beam assembly according to any one of claims 1-4, characterized in that, The thickness of the first connecting bracket and the second connecting bracket is 1.5 times the thickness of the crossbeam.

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