A connection structure design method and system for a segmented large load-bearing swing arm

Abstract

The present invention discloses a segmented large load-bearing swing arm and a design method and system for its connection structure, which relate to the field of automobile design and manufacturing. The segmented large load-bearing swing arm comprises a main bearing member, an auxiliary guide member and a limit block support member which are sequentially connected, and bolts are used to connect the main bearing member and the auxiliary guide member, the auxiliary guide member and the limit block support member, and the limit block support member and the main bearing member. The main bearing member comprises a main bearing member, a ball pin arranged at the front end of the main bearing member, a swing arm front bushing arranged at the rear end of the main bearing member, and a support bushing arranged in the middle of the body bearing member. The auxiliary guide member comprises an auxiliary guide member body and a swing arm rear bushing arranged at the rear end of the auxiliary guide member body. The present invention can realize the effective determination of bolt selection and improve automobile production efficiency.

Description

Technical Field

[0001] The invention relates to the field of automobile design and manufacturing, and in particular to a connection structure design method and system for a segmented large-load-bearing swing arm. Background Art

[0002] The suspension system is an important part of the car, which has a great impact on the ride smoothness and handling stability of the car. The independent suspension swing arm (also known as the control arm) is a guide and force transmission element of the automobile suspension system. It is used to transmit various forces acting on the wheel to the body, while ensuring that the wheel moves along a certain trajectory. The independent suspension swing arm elastically connects the wheel and the body through a ball joint or bushing. The independent suspension swing arm should have sufficient rigidity, strength and service life.

[0003] At present, the independent suspension swing arms of medium-sized vehicles are mostly forged parts. Because it is difficult to form the whole blank, they are often made of two-stage or split structures, and each split part is connected by bolts. In the actual application process, the selection of bolts is based on experience and requires repeated tests to determine, which greatly reduces the efficiency of automobile production. Summary of the invention

[0004] In view of the defects existing in the prior art, the purpose of the present invention is to provide a connection structure design method and system for a segmented large load-bearing swing arm, which can effectively determine the bolt selection and improve the automobile production efficiency.

[0005] To achieve the above objectives, the present invention provides a method for designing a connection structure of a segmented large load-bearing swing arm, which is used to design and analyze the performance of bolts of the segmented large load-bearing swing arm, and specifically includes the following steps:

[0006] The model of the segmented large load-bearing swing arm is imported into the simulation software, and the bolts in the segmented large load-bearing swing arm are replaced with bushing elements;

[0007] Assign values ​​to the performance parameters of the bushing components, apply multi-condition loads to the components of the segmented large load-bearing swing arm for simulation calculation, and obtain the six-directional loads of the bushing components;

[0008] Based on the obtained six-way load and the preload generated by the normal pressure required on the joint surface, the strength analysis of the bolt is carried out in an iterative manner;

[0009] Based on the analysis results, determine the minimum specifications and mechanical strength grade of the bolts;

[0010] Wherein, the joint surface is the contact surface between the main body bearing member, the auxiliary guide member and the limit block support member;

[0011] Among them, the segmented large-load-bearing swing arm includes a main bearing member, an auxiliary guide member and a limit block support member which are connected in sequence, and the main bearing member and the auxiliary guide member, the auxiliary guide member and the limit block support member, and the limit block support member and the main bearing member are all connected by bolts. The main bearing member includes a main bearing member, a ball pin arranged at the front end of the main bearing member, a swing arm front bushing arranged at the rear end of the main bearing member, and a support bushing arranged in the middle of the body bearing member. The auxiliary guide member includes an auxiliary guide member body and a swing arm rear bushing arranged at the rear end of the auxiliary guide member body.

[0012] On the basis of the above technical solution, the model of the segmented large load-bearing swing arm is imported into the simulation software, and the bolts in the segmented large load-bearing swing arm are replaced with bushing elements. The specific steps include:

[0013] Import the 3D model of the segmented large load-bearing swing arm into the ADAMS software;

[0014] The built-in bushing elements in the ADAMS software are used to replace the bolts in the segmented large load-bearing swing arm.

[0015] On the basis of the above technical solution, the bushing element provided in the ADAMS software is used to replace the bolts in the segmented large load-bearing swing arm, specifically:

[0016] Placing the bushing element on the joint surface between the main bearing member and the auxiliary guide member, the joint surface between the auxiliary guide member and the limit block support member, and the joint surface between the limit block support member and the main bearing member;

[0017] Adjust the position of the bushing element so that the axis of the bushing element coincides with the axis of the bolt, and for each bushing element, establish a coordinate system with the intersection of the axis of the bushing element and the corresponding joint surface as the origin;

[0018] The bushing element is connected to the parts of the corresponding joint surfaces of the current bushing element to form three sets of connection pairs.

[0019] On the basis of the above technical solution, the performance parameters of the bushing element are assigned values, specifically, six-way stiffness parameters and damping parameters of the bushing element are assigned values.

[0020] On the basis of the above technical solution, the multi-condition load is applied to each component of the segmented large load-bearing swing arm to perform simulation calculation to obtain the six-direction load of the bushing element. The specific steps include:

[0021] Apply multi-condition loads to the components of the segmented large load-bearing swing arm for simulation calculation, without taking into account the friction effect and anti-loosening preload;

[0022] Based on the simulation results, the obtained six-way load of each bushing element is used as the six-way load of the corresponding bolt.

[0023] On the basis of the above technical solution, the specific steps of determining the minimum specification and mechanical strength grade of the bolts include:

[0024] Based on the six-way load of the bolt and the preset algorithm, the nominal diameter of the bolt is calculated and rounded to initially select the bolt specification;

[0025] Calculate the working stress of the bolt under each working condition and take the maximum value;

[0026] The preload stress of the bolt is calculated based on the required preload and the nominal diameter of the initially selected bolt;

[0027] The calculated maximum working stress and preload stress are superimposed to form a resultant stress;

[0028] The judgment condition is that the combined stress is not greater than the preset multiple yield strength of the mechanical property grade, and iterative optimization is continuously performed until the condition is met, thereby determining the minimum specification and mechanical strength grade of the bolt.

[0029] The present invention provides a connection structure design system for a segmented large load-bearing swing arm, based on the above connection structure design method, comprising:

[0030] An import module, which is used to import the model of the segmented large load-bearing swing arm into the simulation software, and replace the bolts in the segmented large load-bearing swing arm with bushing elements;

[0031] A simulation module is used to assign values ​​to the performance parameters of the bushing element, apply multi-condition loads to various components of the segmented large load-bearing swing arm to perform simulation calculations, and obtain six-directional loads of the bushing element;

[0032] An analysis module for iteratively analyzing the strength of the bolts based on the obtained six-way loads and the preload generated by the required normal pressure on the joint surface;

[0033] A determination module, which is used to determine the minimum specification and mechanical strength grade of the bolt based on the analysis results;

[0034] Wherein, the joint surface is the mutual contact surface between the main body bearing member, the auxiliary guide member and the limit block support member.

[0035] Compared with the prior art, the advantages of the present invention are: by importing the model of the segmented large load-bearing swing arm into the simulation software, and replacing the bolts in the segmented large load-bearing swing arm with bushing elements, and then assigning performance parameters of the bushing elements, applying multi-condition loads to each component of the segmented large load-bearing swing arm for simulation calculation, the six-way load of the bushing element is obtained, and then based on the obtained six-way load and the preload generated by the required positive pressure on the joint surface, the strength analysis of the bolt is performed in an iterative manner, and finally the minimum specification and mechanical strength grade of the bolt are determined based on the analysis results, so as to achieve effective determination of bolt selection and improve automobile production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 It is a structural schematic diagram of a segmented large load-bearing swing arm in an embodiment of the present invention;

[0038] Figure 2 The present invention is a flowchart of a method for designing a connection structure of a segmented large load-bearing swing arm in an embodiment of the present invention. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. It should be noted that the orientation or position relationship indicated by the terms "upper" and "lower" is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application 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 a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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 directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0040] See also Figure 1 As shown, a segmented large-load-bearing swing arm provided in an embodiment of the present invention comprises a main load-bearing member, an auxiliary guide member and a limit block support member which are sequentially connected, and bolt connections are adopted between the main load-bearing member and the auxiliary guide member, between the auxiliary guide member and the limit block support member, and between the limit block support member and the main load-bearing member.

[0041] Specifically, the main bearing member includes a main bearing member body, a ball pin arranged at the front end of the main bearing member body, a swing arm front bushing arranged at the rear end of the main bearing member body, and a support bushing arranged at the middle of the main bearing member body. The auxiliary guide member includes an auxiliary guide member body and a swing arm rear bushing arranged at the rear end of the auxiliary guide member body.

[0042] As for the specific connection method between the main bearing member, the auxiliary guide member and the limit block support member, the front end of the main bearing member and the front end of the limit block support member are connected by bolts, the rear part of the main bearing member and the front end of the auxiliary guide member are connected by bolts, and the rear part of the auxiliary guide member and the front end of the limit block support member are connected by bolts. Figure 1 In the figure, number 1 represents the main bearing part, number 2 represents the auxiliary guide part, number 3 represents the limit block support part, number 4 represents the bolt, number 5 represents the ball pin, number 6 represents the main bearing part body, number 7 represents the support bushing, number 8 represents the front bushing of the swing arm, number 9 represents the auxiliary guide part body, and number 10 represents the rear bushing of the swing arm.

[0043] See also Figure 2 As shown, a connection structure design method of a segmented large load-bearing swing arm provided by an embodiment of the present invention is used to design and analyze the performance of the bolts of the segmented large load-bearing swing arm, that is, to select the specifications of the bolts of the segmented large load-bearing swing arm and analyze the mechanical performance grade strength of the bolts. The connection structure design method of the segmented large load-bearing swing arm specifically includes the following steps:

[0044] S1: Import the model of the segmented large load-bearing swing arm into the simulation software, and replace the bolts in the segmented large load-bearing swing arm with bushing elements;

[0045] In the present invention, the model of the segmented large load-bearing swing arm is imported into the simulation software, and the bolts in the segmented large load-bearing swing arm are replaced with bushing elements. The specific steps include:

[0046] S101: Import the 3D model of the segmented large load-bearing swing arm into ADAMS (Automatic Dynamic Analysis of Mechanical Systems) software;

[0047] S102: Use the bushing element provided in the ADAMS software to replace the bolts in the segmented large load-bearing swing arm. That is, the bolts are regarded as elastic parts (with six-way strength) and replaced with the bushing element provided in the ADAMS software.

[0048] In the present invention, the bushing element provided in the ADAMS software is used to replace the bolts in the segmented large load-bearing swing arm, specifically:

[0049] S1021: placing a bushing element on a joint surface between the main bearing member and the auxiliary guide member, a joint surface between the auxiliary guide member and the limit block support member, and a joint surface between the limit block support member and the main bearing member;

[0050] There are three bolts in the original segmented large load-bearing swing arm, so there are also three bushing elements, one of which is placed on the joint surface between the main bearing part and the auxiliary guide part, one is placed on the joint surface between the auxiliary guide part and the limit block support part, and the remaining bushing element is placed on the joint surface between the limit block support part and the main bearing part. The joint surface is the contact surface between the components.

[0051] S1022: adjusting the position of the bushing element so that the axis of the bushing element coincides with the axis of the bolt, and for each bushing element, establishing a coordinate system with the intersection of the axis of the bushing element and the corresponding joint surface as the origin;

[0052] There is no volume requirement for the bushing element, only a direction requirement. The position of the bushing element is adjusted so that the axis of the bushing element coincides with the axis of the bolt corresponding to the bushing element, and then a local coordinate system is established for each bushing element.

[0053] For example, for the bushing element between the main bearing part and the auxiliary guide part, the intersection of the axis of the bushing element and the joint surface between the main bearing part and the auxiliary guide part is taken as the coordinate origin, the axis of the bushing element is the X-axis, the positive direction points to the threaded end of the bolt, the Z-axis points to the axis of the segmented large load-bearing swing arm, and the Y-axis is determined by the right-hand rule.

[0054] S1023: Connect the bushing element and the parts of the corresponding joint surface of the current bushing element to form three sets of connection pairs. For example, for the bushing element between the main bearing member and the auxiliary guide member, connect the bushing element, the main bearing member and the auxiliary guide member to form a set of connection pairs.

[0055] S2: Assign values ​​to the performance parameters of the bushing element, apply multi-condition loads to various components of the segmented large load-bearing swing arm for simulation calculation, and obtain the six-directional loads of the bushing element;

[0056] In the present invention, the performance parameters of the bushing element are assigned values, specifically, the six-way stiffness parameters and damping parameters of the bushing element are assigned values. The size of the six-way stiffness parameters and damping parameters has an impact on the simulation convergence, but does not affect the calculation results.

[0057] In the present invention, multi-condition loads are applied to various components of the segmented large load-bearing swing arm to perform simulation calculations to obtain six-directional loads of the bushing element. The specific steps include:

[0058] S201: Apply multi-condition loads to various components of the segmented large load-bearing swing arm for simulation calculation, without taking into account friction and anti-loosening preload;

[0059] S202: Based on the simulation results, the obtained six-way load of each bushing element is used as the six-way load of the corresponding bolt.

[0060] That is, multi-condition loads extracted from the vehicle analysis model acting on the components of the large load-bearing swing arm are applied for simulation calculation, and then the six-way loads ( , , , , , ) as the six-way load of the corresponding bolt.

[0061] S3: Based on the obtained six-way load and the preload generated by the required normal pressure on the joint surface, the strength analysis of the bolt is carried out in an iterative manner; the joint surface is the contact surface between the main bearing member, the auxiliary guide member and the limit block support member.

[0062] S4: Based on the analysis results, determine the minimum specifications and mechanical strength grade of the bolts;

[0063] In the present invention, the minimum specification and mechanical strength grade of the bolt are determined, and the specific steps include:

[0064] S401: Based on the six-way load of the bolt and the preset algorithm, the nominal diameter of the bolt is calculated and rounded to initially select the bolt specification;

[0065] S402: Calculate the working stress of the bolt under each working condition and take the maximum value;

[0066] S403: Calculate the preload stress of the bolt according to the required preload and the nominal diameter of the initially selected bolt;

[0067] S404: superimposing the calculated maximum working stress and preload stress to form a resultant stress;

[0068] S405: The combined stress is not greater than the preset multiple yield strength of the mechanical property grade as a judgment condition, and iterative optimization is continuously performed until the condition is met, thereby determining the minimum specification and mechanical strength grade of the bolt. The preset multiple can be 0.8 times.

[0069] Specifically, on the one hand, according to the obtained six-way load of the bolt and the calculation formula , find the nominal diameter of the bolt (Unit: mm) and rounded to initially select the bolt specifications, then calculate the working stress of the bolt under each working condition (calculate and synthesize the maximum normal stress according to the fourth strength theory), and take the maximum value; on the other hand, according to the required preload (≥1.5 ) and the nominal diameter of the initially selected bolt to calculate the preload stress. Finally, the maximum working stress and the preload stress are superimposed to form the resultant stress. The resultant stress is not greater than 0.8 times the yield strength of the mechanical property grade as the judgment condition. Iterative optimization is continuously performed until the conditions are met, and the required bolt specifications (rounded to the larger diameter) and mechanical property grades are obtained.

[0070] in, It is derived by considering only the two-way main loads, using the minimum required mechanical strength level 8.8 and judgment conditions.

[0071] The connection structure design method of the segmented large load-bearing swing arm in the embodiment of the present invention imports the model of the segmented large load-bearing swing arm into the simulation software, replaces the bolts in the segmented large load-bearing swing arm with bushing elements, and then assigns performance parameters of the bushing elements, applies multi-condition loads to each component of the segmented large load-bearing swing arm for simulation calculation, and obtains the six-way load of the bushing element, and then based on the obtained six-way load and the preload generated by the required positive pressure on the joint surface, an iterative method is used to perform strength analysis on the bolts, and finally based on the analysis results, the minimum specification and mechanical strength grade of the bolts are determined, so as to achieve effective determination of bolt selection and improve automobile production efficiency.

[0072] In a possible implementation manner, an embodiment of the present invention further provides a readable storage medium, the readable storage medium is located in a PLC (Programmable Logic Controller) controller, and a computer program is stored on the readable storage medium. When the program is executed by a processor, the following steps of the method for designing a connection structure of a segmented large load-bearing swing arm are implemented:

[0073] The model of the segmented large load-bearing swing arm is imported into the simulation software, and the bolts in the segmented large load-bearing swing arm are replaced with bushing elements;

[0074] Assign values ​​to the performance parameters of the bushing components, apply multi-condition loads to the components of the segmented large load-bearing swing arm for simulation calculation, and obtain the six-directional loads of the bushing components;

[0075] Based on the obtained six-way load and the preload generated by the normal pressure required on the joint surface, the strength analysis of the bolt is carried out in an iterative manner;

[0076] Based on the analysis results, determine the minimum specifications and mechanical strength grade of the bolts;

[0077] Wherein, the joint surface is the mutual contact surface between the main body bearing member, the auxiliary guide member and the limit block support member.

[0078] The storage medium may adopt any combination of one or more computer-readable media. The computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium may be, for example, but not limited to: an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples (non-exhaustive list) of computer-readable storage media include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this document, a computer-readable storage medium may be any tangible medium containing or storing a program, which may be used by or in combination with an instruction execution system, device or device.

[0079] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, which carry computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, device, or device. The program code contained on the computer-readable medium may be transmitted using any suitable medium, including but not limited to: wireless, wire, optical cable, RF, etc., or any suitable combination of the above.

[0080] Computer program code for performing the operation of the present invention may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0081] A connection structure design system for a segmented large-load-bearing swing arm provided in an embodiment of the present invention includes an import module, a simulation module, an analysis module and a determination module.

[0082] The import module is used to import the model of the segmented large-load-bearing swing arm into the simulation software, and replace the bolts in the segmented large-load-bearing swing arm with bushing elements; the simulation module is used to assign performance parameters of the bushing elements, apply multi-condition loads to various components of the segmented large-load-bearing swing arm for simulation calculation, and obtain the six-way load of the bushing element; the analysis module is used to perform strength analysis on the bolts in an iterative manner based on the obtained six-way loads and the preload generated by the required positive pressure on the joint surface; the determination module is used to determine the minimum specification and mechanical strength grade of the bolts based on the analysis results; wherein, the joint surface is the contact surface between the main load-bearing component, the auxiliary guide component and the limit block support component.

[0083] In the present invention, the model of the segmented large load-bearing swing arm is imported into the simulation software, and the bolts in the segmented large load-bearing swing arm are replaced with bushing elements. The specific process includes:

[0084] Import the 3D model of the segmented large load-bearing swing arm into the ADAMS software;

[0085] The built-in bushing elements in the ADAMS software are used to replace the bolts in the segmented large load-bearing swing arm.

[0086] In the present invention, the bushing element provided in the ADAMS software is used to replace the bolts in the segmented large load-bearing swing arm, specifically:

[0087] Placing the bushing element on the joint surface between the main bearing member and the auxiliary guide member, the joint surface between the auxiliary guide member and the limit block support member, and the joint surface between the limit block support member and the main bearing member;

[0088] Adjust the position of the bushing element so that the axis of the bushing element coincides with the axis of the bolt, and for each bushing element, establish a coordinate system with the intersection of the axis of the bushing element and the corresponding joint surface as the origin;

[0089] The bushing element is connected to the parts of the corresponding joint surfaces of the current bushing element to form three sets of connection pairs.

[0090] In the present invention, the performance parameters of the bushing element are assigned values, specifically, the six-directional stiffness parameters and damping parameters of the bushing element are assigned values.

[0091] By importing the model of the segmented large load-bearing swing arm into the simulation software, replacing the bolts in the segmented large load-bearing swing arm with bushing elements, and then assigning performance parameters of the bushing elements, multi-condition loads are applied to each component of the segmented large load-bearing swing arm for simulation calculation, and the six-way load of the bushing element is obtained. Then, based on the obtained six-way load and the preload generated by the required positive pressure on the mating surface, the strength analysis of the bolts is performed in an iterative manner. Finally, based on the analysis results, the minimum specification and mechanical strength grade of the bolts are determined, so as to effectively determine the bolt selection and improve the automobile production efficiency.

[0092] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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 a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0093] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0094] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A method for designing a connection structure of a segmented large load-bearing swing arm, used for designing and analyzing the performance of bolts of the segmented large load-bearing swing arm, characterized in that: The specific steps include: The model of the segmented large load-bearing swing arm is imported into the simulation software, and the bolts in the segmented large load-bearing swing arm are replaced with bushing elements; Assign values ​​to the performance parameters of the bushing components, apply multi-condition loads to the components of the segmented large load-bearing swing arm for simulation calculation, and obtain the six-directional loads of the bushing components; Based on the obtained six-way load and the preload generated by the normal pressure required on the joint surface, the strength analysis of the bolt is carried out in an iterative manner; Based on the analysis results, determine the minimum specifications and mechanical strength grade of the bolts; Wherein, the joint surface is the contact surface between the main body bearing member, the auxiliary guide member and the limit block support member; Among them, the segmented large-load-bearing swing arm includes a main bearing member, an auxiliary guide member and a limit block support member which are connected in sequence, and the main bearing member and the auxiliary guide member, the auxiliary guide member and the limit block support member, and the limit block support member and the main bearing member are all connected by bolts. The main bearing member includes a main bearing member, a ball pin arranged at the front end of the main bearing member, a swing arm front bushing arranged at the rear end of the main bearing member, and a support bushing arranged in the middle of the body bearing member. The auxiliary guide member includes an auxiliary guide member body and a swing arm rear bushing arranged at the rear end of the auxiliary guide member body.

2. A method for designing a connection structure of a segmented large load-bearing swing arm as claimed in claim 1, characterized in that: The step of importing the model of the segmented large load-bearing swing arm into the simulation software and replacing the bolts in the segmented large load-bearing swing arm with bushing elements specifically includes: Import the 3D model of the segmented large load-bearing swing arm into the ADAMS software; The built-in bushing elements in the ADAMS software are used to replace the bolts in the segmented large load-bearing swing arm.

3. A method for designing a connection structure of a segmented large load-bearing swing arm as claimed in claim 2, characterized in that: The method of replacing the bolts in the segmented large load-bearing swing arm with the bushing element provided in the ADAMS software is as follows: Placing the bushing element on the joint surface between the main bearing member and the auxiliary guide member, the joint surface between the auxiliary guide member and the limit block support member, and the joint surface between the limit block support member and the main bearing member; Adjust the position of the bushing element so that the axis of the bushing element coincides with the axis of the bolt, and for each bushing element, establish a coordinate system with the intersection of the axis of the bushing element and the corresponding joint surface as the origin; The bushing element is connected to the parts of the corresponding joint surfaces of the current bushing element to form three sets of connection pairs.

4. A method for designing a connection structure of a segmented large load-bearing swing arm as claimed in claim 1, characterized in that: The assigning of the performance parameters of the bushing element specifically includes: assigning the six-directional stiffness parameters and damping parameters of the bushing element.

5. The method for designing the connection structure of a segmented large load-bearing swing arm according to claim 1, characterized in that: The multi-condition load is applied to each component of the segmented large load-bearing swing arm to perform simulation calculation to obtain the six-direction load of the bushing element. The specific steps include: Apply multi-condition loads to the components of the segmented large load-bearing swing arm for simulation calculation, without taking into account the friction effect and anti-loosening preload; Based on the simulation results, the obtained six-way load of each bushing element is used as the six-way load of the corresponding bolt.

6. A method for designing a connection structure of a segmented large load-bearing swing arm as claimed in claim 5, characterized in that: The specific steps of determining the minimum specification and mechanical strength grade of the bolt include: Based on the six-way load of the bolt and the preset algorithm, the nominal diameter of the bolt is calculated and rounded to initially select the bolt specification; Calculate the working stress of the bolt under each working condition and take the maximum value; The preload stress of the bolt is calculated based on the required preload and the nominal diameter of the initially selected bolt; The calculated maximum working stress and preload stress are superimposed to form a resultant stress; The judgment condition is that the combined stress is not greater than the preset multiple yield strength of the mechanical property grade, and iterative optimization is continuously performed until the condition is met, thereby determining the minimum specification and mechanical strength grade of the bolt.

7. A connection structure design system for a segmented large load-bearing swing arm, based on the connection structure design method of claim 1, characterized in that: include: An import module, which is used to import the model of the segmented large load-bearing swing arm into the simulation software, and replace the bolts in the segmented large load-bearing swing arm with bushing elements; A simulation module is used to assign values ​​to the performance parameters of the bushing element, apply multi-condition loads to various components of the segmented large load-bearing swing arm to perform simulation calculations, and obtain six-directional loads of the bushing element; An analysis module for iteratively analyzing the strength of the bolts based on the obtained six-way loads and the preload generated by the required normal pressure on the joint surface; A determination module, which is used to determine the minimum specification and mechanical strength grade of the bolt based on the analysis results; Wherein, the joint surface is the mutual contact surface between the main body bearing member, the auxiliary guide member and the limit block support member.

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