Arm assembly inspection fixture

Abstract

The utility model relates to mechanical detection technical field especially, it relates to a kind of support arm subassembly detection tool, support arm subassembly includes support arm body and shaft sleeve, shaft sleeve is rotatable by damping and is set to support arm body one end;Support arm subassembly detection tool includes base and load component, base is provided with the mounting seat for fixing shaft sleeve;Load component is detachably set to the end of support arm body away from shaft sleeve, for the end of support arm body away from shaft sleeve is applied load;When the end of support arm body away from shaft sleeve occurs displacement after load is applied, it shows that support arm subassembly assembly is unqualified;When the end of support arm body away from shaft sleeve does not occur displacement after load is applied, it shows that support arm subassembly assembly is qualified, the support arm subassembly detection tool provided by the utility model can simulate the stress state under actual use condition, objectively and accurately detect the assembly quality of damping connection between shaft sleeve and support arm body, improve detection effect and detection accuracy.

Description

Technical Field

[0001] This utility model relates to the field of mechanical testing technology, and in particular to a testing fixture for a support arm assembly. Background Technology

[0002] Titanium alloys possess high strength, low density, and corrosion resistance, making them a viable alternative to steel in industrial sectors such as military, aerospace, and marine engineering. With advancements in materials technology, an increasing number of vehicle components are using titanium alloys to replace traditional steel, achieving lighter vehicle bodies and improved corrosion resistance. As a crucial structural component of special-purpose vehicles, the assembly quality of the boom assembly directly impacts the vehicle's performance and safety.

[0003] A boom assembly typically consists of a boom body and a bushing, which are connected by a damping mechanism to allow relative rotation while providing appropriate damping torque to maintain a set angular position. In practical applications, the boom assembly needs to bear significant loads and maintain a stable angle, requiring reliable connection strength between the bushing and the boom body. When assembly quality is compromised, relative slippage or rotation can easily occur under load, causing the boom to fail to maintain the preset angle, affecting operational efficiency and even creating safety hazards.

[0004] Currently, in the inspection process after outrigger assembly, traditional inspection methods mainly rely on manual visual inspection and simple manual operation tests. Inspectors judge the assembly quality by observing the appearance of the assembly and manually rotating the outrigger to feel the resistance. This inspection method has obvious shortcomings: low inspection efficiency, which cannot meet the cycle time requirements of mass production; the standard for judging assembly accuracy is highly subjective, and the judgment results of different inspectors may vary greatly; and there is a lack of quantitative inspection standards, making it impossible to accurately assess whether the assembly quality meets the actual use requirements.

[0005] More importantly, traditional testing methods cannot effectively simulate the stress state of the outrigger assembly in actual use. During actual operation, one end of the outrigger assembly is fixed, while the other end bears a heavy load, requiring it to withstand considerable torque to maintain stability. Existing testing methods struggle to apply load conditions equivalent to those in actual use, thus failing to accurately identify assembly defects that only manifest under real working loads. Minor assembly quality issues may go undetected by simple inspections, but will gradually surface during actual use, leading to malfunctions such as outrigger sagging and loose connections. Utility Model Content

[0006] This utility model provides a testing fixture for outrigger components. This testing fixture can simulate the stress state under actual use conditions and objectively and accurately detect the assembly quality of the damping connection between the bushing and the outrigger body, thereby improving the testing effect and accuracy.

[0007] This utility model provides a testing fixture for an outrigger assembly. The outrigger assembly includes an outrigger body and a bushing, with the bushing rotatably mounted on one end of the outrigger body via damping. The testing fixture includes: a base with a mounting seat for fixing the bushing; and a load assembly detachably mounted on the end of the outrigger body away from the bushing for applying a load to that end. When the end of the outrigger body away from the bushing shifts after applying the load, it indicates relative rotation between the outrigger body and the bushing, and the outrigger assembly is unqualified. When the end of the outrigger body away from the bushing does not shift after applying the load, it indicates no relative rotation between the outrigger body and the bushing, and the outrigger assembly is qualified.

[0008] In one possible implementation, the bushing has overlapping plates at both ends along the axial direction, and the mounting base has two limiting grooves that are respectively inserted into the two overlapping plates to limit the rotation of the bushing.

[0009] In one possible implementation, a platform structure is provided at the end of the outrigger body away from the bushing, and the load assembly can be detachably installed on the platform structure.

[0010] In one possible implementation, once the bushing is fixed to the mounting base, the platform structure is in a horizontal position to ensure that the direction of gravity exerted by the load assembly on the platform structure is vertically downward.

[0011] In one possible implementation, a pressure-applying mechanism is also included, which applies leveling pressure to the end of the support arm body away from the bushing before testing, so as to bring the platform structure to a horizontal state.

[0012] In one possible implementation, the load-bearing components include: a protective sleeve fitted over the platform structure; and a counterweight placed on the protective sleeve.

[0013] In one possible implementation, the protective sleeve is provided with a positioning structure for positioning the counterweight.

[0014] In one possible implementation, a displacement detection module is also included, which is mounted on the load assembly and is used to detect the height change of the arm body at the end away from the bushing.

[0015] In one possible implementation, the outrigger assembly includes two bushings and two mounting seats on the base, each used to secure one of the bushings.

[0016] In one possible implementation, the base includes: a base plate with mounting holes for connecting the platform; two reinforcing side plates disposed opposite to each other on the base plate; and a mounting plate disposed on the base plate and located between the two reinforcing side plates; wherein a mounting seat is disposed on the mounting plate.

[0017] This utility model provides a testing fixture for outrigger components. A bushing is fixed to the base via a mounting seat, while a load assembly is placed at the end of the outrigger body furthest from the bushing to apply a load. When there are assembly problems between the bushing and the outrigger body, the damping connection is not secure, causing relative rotation under load and resulting in displacement of the distal end of the outrigger body. This effectively detects the assembly quality of the outrigger component. The testing principle is based on a force model from actual use. When the load assembly applies a downward force, a torque is generated at the bushing location. The magnitude of this torque is equal to the load weight multiplied by the distance from the load application point to the bushing's rotation center. If the assembly quality between the bushing and the outrigger body is good, the damping connection provides sufficient torsional strength to resist the external torque, and the outrigger body remains stable and does not rotate. If there are assembly defects, the torsional resistance of the damping connection is insufficient, and the bushing and outrigger body rotate relative to each other under external torque, causing the distal end of the outrigger body to sink and displace. By directly simulating the actual load state of the outrigger component during vehicle operation, and objectively reflecting the assembly quality through displacement changes, this method solves the technical problems of traditional testing methods, such as the inability to apply equivalent loads and the strong subjectivity of testing standards. Compared with traditional manual inspection methods, this invention establishes quantitative inspection standards, eliminates the interference of human factors, significantly improves inspection accuracy and efficiency, provides an effective means for quality control in mass production, and ensures the reliability and safety of products in actual use. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of a testing fixture for a support arm assembly provided by this utility model.

[0020] Figure 2 This is a schematic diagram of the planar structure of a testing fixture for a support arm assembly provided by this utility model.

[0021] Figure 3 This is a three-dimensional structural diagram of a base provided by this utility model.

[0022] Figure 4 This is a schematic diagram of the planar structure of another support arm assembly testing fixture provided by this utility model.

[0023] Figure 5 This is a three-dimensional structural diagram of a support arm assembly provided by this utility model.

[0024] Figure label: a. Outrigger body; a1. Platform structure; b. Bushing; b1. Overlap plate; 1. Base; 11. Mounting bracket; 111. Limiting groove; 12. Base plate; 13. Reinforcing side plate; 14. Mounting plate; 2. Load-bearing components; 21. Protective sleeve; 211. Positioning structure; 22. Counterweight; 3. Pressure application mechanism; 4. Displacement detection module. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] The following is combined Figure 1-5 This invention describes a testing fixture for a support arm assembly. The support arm assembly includes a support arm body a and a bushing b. The bushing b is rotatably mounted on one end of the support arm body a via damping. The testing fixture for the support arm assembly includes a base 1 and a load assembly 2, wherein: The base 1 is provided with a mounting seat 11 for fixing the bushing b.

[0027] The load assembly 2 is detachably mounted on the end of the support arm body a away from the bushing b, and is used to apply a load to the end of the support arm body a away from the bushing b.

[0028] When the end of the outrigger body a furthest from the bushing b is displaced after a load is applied, it indicates that there is relative rotation between the outrigger body a and the bushing b, and the outrigger assembly is not qualified. When the end of the outrigger body a furthest from the bushing b is not displaced after a load is applied, it indicates that there is no relative rotation between the outrigger body a and the bushing b, and the outrigger assembly is qualified.

[0029] In this invention, the bushing b is fixed by the mounting seat 11 on the base 1, and a load assembly 2 is set at the end of the support arm body a away from the bushing b to apply a load. When there is a problem with the assembly between the bushing b and the support arm body a, the damping connection between the two is not firm, and relative rotation will occur under the load, causing displacement of the distal end of the support arm body a, thereby achieving effective detection of the assembly quality of the support arm assembly. This detection principle is based on the force model in actual use. When the load assembly 2 applies a vertically downward gravity, a torque will be generated at the bushing b position. The magnitude of this torque is equal to the load weight multiplied by the distance from the load application point to the rotation center of the bushing b. If the assembly quality between the bushing b and the support arm body a is good, the damping connection can provide sufficient torsional strength to resist the external torque, and the support arm body a remains stable and does not rotate; if there is a defect in the assembly, the torsional resistance of the damping connection is insufficient, and the bushing b and the support arm body a will rotate relative to each other under the action of the external torque, causing the distal end of the support arm body a to sink and displace. By directly simulating the actual load state of the outrigger assembly during vehicle operation, and objectively reflecting the assembly quality through displacement changes, this invention solves the technical problems of traditional testing methods, such as the inability to apply equivalent loads and the strong subjectivity of testing standards. Compared with traditional manual testing methods, this invention establishes quantitative testing standards, eliminates the interference of human factors, significantly improves testing accuracy and efficiency, provides an effective means for quality control in mass production, and ensures the reliability and safety of products in actual use.

[0030] Specifically, bushing b is rotatably mounted on one end of the support arm body a, and there is a damping force between bushing b and support arm body a. This testing fixture is used to test the assembly effect of bushing b and support arm body a. The damping force between bushing b and support arm body a needs to be greater than a preset value to indicate that the assembly of bushing b and support arm body a is qualified or that the bushing b and support arm body a product is qualified. Mounting base 11 firmly fixes bushing b, eliminating the rotational degree of freedom of bushing b. Load component 2 applies a vertically downward gravity load to the distal end of support arm body a. When the damping assembly between bushing b and support arm body a is normal, there is sufficient binding force between them to resist the external load, and the distal end of support arm body a will not displace. When there is an assembly defect, the binding force is insufficient to resist the torque generated by the load, bushing b and support arm body a rotate relative to each other, and the distal end of support arm body a sinks accordingly.

[0031] In related technologies, the assembly quality inspection of outrigger components mainly relies on manual visual inspection or simple manual swing tests, which cannot accurately assess the reliability of the damping connection and easily overlooks assembly defects, leading to problems such as outrigger sag or excessively loose rotation during product use. However, in this embodiment of the invention, by applying a quantitative load and observing displacement changes, the assembly quality of the damping connection can be accurately identified. The inspection results are objective and reliable, avoiding the subjectivity and uncertainty of human judgment and significantly improving the effectiveness of assembly quality control.

[0032] In some embodiments, the bushing b has overlapping plates b1 at both ends along the axial direction, and the mounting base 11 has two limiting grooves 111. The two limiting grooves 111 are respectively inserted into the two overlapping plates b1 to limit the rotation of the bushing b.

[0033] In this invention, the overlapping plates b1 at both ends of the bushing b along the axial direction engage with the two limiting grooves 111 on the mounting base 11, effectively constraining the bushing b in both the circumferential and axial directions, completely restricting the rotational freedom of the bushing b. The overlapping plates b1, as an extension structure of the bushing b, achieve precise positioning through geometrical engagement with the limiting grooves 111, ensuring that the bushing b remains fixed during testing.

[0034] Specifically, two overlapping plates b1 are located at both ends of the bushing b. When inserted into the corresponding limiting groove 111, the side of the overlapping plate b1 fits against the wall of the limiting groove 111, forming a surface contact constraint. This double-end constraint method distributes the rotational load of the bushing b to two constraint points, avoiding stress concentration and constraint failure that may occur with single-point constraint. The depth and width of the limiting groove 111 match the overlapping plate b1, and the fitting clearance generated during the insertion process is controlled within a reasonable range, ensuring both constraint effect and ease of assembly and disassembly.

[0035] In this embodiment of the utility model, the insertion method of the overlapping plate b1 and the limiting groove 111 does not require additional processing of the bushing b, and will not damage the surface of the bushing b. At the same time, the insertion operation is simple and quick, and the assembly and disassembly efficiency is high, which is suitable for the needs of batch testing operations.

[0036] In some embodiments, a platform structure a1 is provided at the end of the support arm body a away from the bushing b, and the load assembly 2 is detachably installed on the platform structure a1.

[0037] In this invention, a platform structure a1 located at the end of the support arm body a away from the bushing b provides a standardized mounting base for the load assembly 2. The platform structure a1 has a regular geometric shape and a flat surface, enabling the load assembly 2 to be installed stably and to uniformly transfer the load. As the interface for load transfer, the platform structure a1 transforms the distributed load into a concentrated load acting on the support arm body a, simplifying stress analysis and detection.

[0038] Specifically, platform structure a1 is typically a circular or square flat plate structure with a machined surface to ensure flatness, and positioning features on the edges to facilitate the installation of load assembly 2. When load assembly 2 is installed on platform structure a1, the load is evenly distributed across the cross-section of the support arm body a through platform structure a1, avoiding localized stress concentration. The dimensions of platform structure a1 are determined based on the load-bearing capacity of the support arm body a and the specifications of load assembly 2, ensuring sufficient load-bearing area while controlling the impact of its own weight on the inspection.

[0039] In this embodiment of the utility model, the platform structure a1 provides a unified load application interface, which makes the load distribution uniform and repeatable, and ensures the consistency of conditions between different tests, thereby improving the comparability and reliability of the test results.

[0040] In some embodiments, when the bushing b is fixed to the mounting base 11, the platform structure a1 is in a horizontal state to ensure that the direction of gravity exerted by the load assembly 2 on the platform structure a1 is vertically downward.

[0041] In this invention, after the bushing b is fixed to the mounting base 11, the platform structure a1 is in a horizontal state, ensuring that the gravity applied by the load assembly 2 acts entirely in the vertical direction, eliminating the interference of the horizontal component of gravity on the test results. The load conditions in the horizontal state are clear and singular, providing a basis for establishing a unified test standard and making the test results between different support arm assemblies comparable.

[0042] Specifically, the horizontal state of platform structure a1 is achieved through the precise positioning of mounting base 11 and the accurate assembly of bushing b. When bushing b is correctly inserted into mounting base 11 and reaches the predetermined position, the geometric center line of the support arm body a is parallel to the horizontal plane, and platform structure a1 is naturally in a horizontal state. In the horizontal state, the gravity vector of load component 2 is perpendicular to the surface of platform structure a1, the load transfer path is clear, and it is convenient to perform mechanical analysis and load calculation.

[0043] In related technologies, the inspection of outrigger components often overlooks the importance of the initial posture. Applying loads at arbitrary angles causes uncertain horizontal components of gravity. These horizontal forces may cancel out or enhance the reaction force of the damping connection, distorting the inspection results and failing to accurately reflect the assembly quality. However, in this embodiment of the invention, by ensuring the horizontal state of the platform structure a1, standardized inspection conditions are established. The direction and magnitude of the gravity load are completely determined, resulting in accurate and reliable inspection results, providing an objective basis for quality judgment.

[0044] In some embodiments, a pressure applying mechanism 3 is also included, which is used to apply leveling pressure to the end of the support arm body a away from the bushing b before testing, so as to make the platform structure a1 reach a horizontal state.

[0045] In this invention, the pressure applying mechanism 3 applies pressure to the end of the support arm body a furthest from the bushing b before testing, actively adjusting the platform structure a1 to a horizontal state, thus compensating for manufacturing deviations and assembly errors between different support arm components. The pressure applied by the pressure applying mechanism 3 is greater than the weight of the load component 2, ensuring the reliability of the leveling process and establishing uniform initial conditions for subsequent load testing.

[0046] Specifically, the pressure application mechanism 3 includes a pressure application device and a pressure control system, capable of applying controllable downward pressure to the distal end of the outrigger body a. During leveling, the pressure application mechanism 3 gradually increases the pressure until the platform structure a1 reaches a horizontal state, and then maintains this pressure for a period of time to stabilize the outrigger assembly. After leveling is completed, the pressure application mechanism 3 is removed, and the outrigger assembly remains horizontal under its own weight, at which point formal load testing can begin. The pressure value of the pressure application mechanism 3 is determined according to the specifications of the outrigger assembly and the weight of the load assembly 2, typically 1.2-1.5 times the weight of the load assembly 2.

[0047] In some embodiments, the load component 2 includes: a protective sleeve 21, which is fitted over the platform structure a1; and a counterweight 22, which is placed on the protective sleeve 21.

[0048] In this invention, the protective sleeve 21 is fitted over the platform structure a1, and the counterweight 22 is placed on the protective sleeve 21. This indirect load transfer method effectively protects the platform structure a1 from direct impact from the counterweight 22, while also facilitating the installation and replacement of the counterweight 22. As an intermediate link in load transfer, the protective sleeve 21 distributes the concentrated load to the platform structure a1, reducing stress concentration.

[0049] Specifically, the protective sleeve 21 is made of impact-resistant material, with its inner surface matching the outer contour of the platform structure a1, and its outer surface providing a platform for the counterweight 22. When the counterweight 22 is placed on the protective sleeve 21, the load is first applied to the protective sleeve 21, and then transferred to the platform structure a1 through the contact surface between the protective sleeve 21 and the platform structure a1. The wall thickness and material properties of the protective sleeve 21 are designed to withstand the impact load of the counterweight 22 without permanent deformation.

[0050] In some embodiments, the protective sleeve 21 is provided with a positioning structure 211 for positioning the counterweight 22.

[0051] In this invention, the positioning structure 211 on the protective sleeve 21 provides a precise placement position for the counterweight 22, ensuring that the center of gravity of the counterweight 22 is aligned with the geometric center of the platform structure a1, thus eliminating the influence of eccentric load on the test results. The positioning structure 211, through geometric constraints, ensures good reproducibility of the counterweight 22's position, resulting in completely consistent placement results for different operators at different times.

[0052] Specifically, the positioning structure 211 can be in the form of a groove, a boss, or a positioning pin, which mates with corresponding features on the bottom surface of the counterweight 22. The positioning structure 211 requires high dimensional accuracy, ensuring that the counterweight 22 can be smoothly positioned while eliminating excessive positional deviations. When the counterweight 22 is in place, the positioning structure 211 bears the lateral force of the counterweight 22, preventing slippage during testing. The material of the positioning structure 211 should have sufficient strength and wear resistance to withstand repeated use without wear or deformation.

[0053] In this embodiment of the utility model, the positioning structure 211 achieves precise positioning of the counterweight 22, eliminates human placement errors, and ensures accurate and repeatable load application points, making the test results more reliable and providing conditions for establishing quantitative quality standards.

[0054] In some embodiments, a displacement detection module 4 is also included. The displacement detection module 4 is disposed on the load assembly 2 and is used to detect the height change of the end of the support arm body a away from the bushing b.

[0055] In this invention, the displacement detection module 4 is mounted on the load assembly 2 and can move with the load assembly 2 to monitor the height change of the end of the support arm body a away from the bushing b in real time, transforming qualitative displacement observation into quantitative data measurement. The displacement detection module 4 maintains a relatively fixed distance from the measured point, avoiding the problem of adjusting the measurement range due to differences in the size of the support arm assembly.

[0056] Specifically, the displacement detection module 4 includes a sensor and a data processing unit. The sensor emits a detection signal downwards and receives the reflected signal, calculating the distance based on the time or phase change of the signal. The displacement detection module 4 is fixed to the load assembly 2 and acts together with the load assembly 2 on the distal end of the outrigger body a. When the outrigger body a displaces, the distance between the sensor and the reference surface changes, and the system records and displays the displacement value in real time. The detection accuracy is typically up to 0.1 mm, meeting the needs of outrigger assembly assembly quality assessment.

[0057] In some embodiments, the outrigger assembly includes two bushings b, and the base 1 is provided with two mounting seats 11, which are used to fix the two bushings b respectively.

[0058] In this invention, for a support arm assembly comprising two bushings b, two mounting seats 11 are provided on the base 1 to fix the two bushings b respectively, thereby achieving stable support and precise positioning of the double-shoulder-b support arm assembly. The symmetrical arrangement of the two mounting seats 11 ensures the balance of the support arm assembly during the testing process, avoiding overturning or torsional deformation that may be caused by single-point support.

[0059] Specifically, two mounting seats 11 are distributed along the axial direction of the outrigger assembly, with the spacing determined according to the actual arrangement of the bushings b. Each mounting seat 11 independently fixes its corresponding bushing b, and the two fixing points form a stable support foundation. This dual-point fixing method distributes the weight of the outrigger assembly and external loads to two support points, reducing the stress level at a single point and improving the reliability of the support. The height and angle adjustment of the two mounting seats 11 ensures that the outrigger body a maintains its designed posture after fixing.

[0060] In some embodiments, the base 1 includes: a base plate 12 having mounting holes for connecting a platform; two reinforcing side plates 13 disposed opposite to each other on the base plate 12; and a mounting plate 14 disposed on the base plate 12 and located between the two reinforcing side plates 13; wherein a mounting base 11 is disposed on the mounting plate 14.

[0061] In this invention, the base 1 adopts a combined structure of a base plate 12, reinforcing side plates 13, and mounting plate 14, forming a stable support foundation and installation platform. The mounting holes on the base plate 12 facilitate the fixing of the entire set of testing fixtures onto the testing table, the reinforcing side plates 13 provide lateral support and bending strength, and the mounting plate 14 provides a stable mounting base for the mounting seat 11. The coordinated cooperation of all components achieves the overall stability of the structure.

[0062] Specifically, the base plate 12, as the fundamental load-bearing component, is large in size and thick enough to withstand various loads during the testing process without deformation. Two reinforcing side plates 13 are perpendicular to the base plate 12 and arranged opposite each other, forming a frame structure that significantly improves the bending and torsional stiffness of the base 1. The mounting plate 14 is located between the two side plates and is connected to the base plate 12 and side plates by bolts or welding, providing a precise mounting reference surface for the mounting base 11. The position and size of the mounting holes are designed according to the hole positions of a standard testing table, enabling rapid positioning and fixation.

[0063] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A testing fixture for a support arm assembly, the support arm assembly comprising a support arm body and a bushing, the bushing being rotatably disposed at one end of the support arm body via damping; characterized in that, The outrigger assembly testing fixture includes: The base (1) is provided with a mounting seat (11) for fixing the bushing. The load assembly (2) is detachably disposed at one end of the support arm body away from the bushing, and is used to apply a load to the end of the support arm body away from the bushing. Specifically, if the end of the support arm body furthest from the bushing is displaced after a load is applied, it indicates that relative rotation has occurred between the support arm body and the bushing, and the support arm assembly is not properly assembled; if the end of the support arm body furthest from the bushing does not displace after a load is applied, it indicates that relative rotation has not occurred between the support arm body and the bushing, and the support arm assembly is properly assembled.

2. The outrigger assembly testing fixture according to claim 1, characterized in that, The bushing has overlapping plates at both ends along the axial direction. The mounting base (11) has two limiting grooves (111), which are respectively inserted into the two overlapping plates to restrict the rotation of the bushing.

3. The outrigger assembly testing fixture according to claim 1, characterized in that, The support arm body is provided with a platform structure at one end away from the bushing, and the load component (2) is detachably installed on the platform structure.

4. The outrigger assembly testing fixture according to claim 3, characterized in that, When the bushing is fixed to the mounting base (11), the platform structure is in a horizontal state to ensure that the direction of gravity exerted by the load assembly (2) on the platform structure is vertically downward.

5. The testing fixture for the outrigger assembly according to claim 4, characterized in that, It also includes a pressure application mechanism (3), which is used to apply leveling pressure to the end of the support arm body away from the bushing before testing, so that the platform structure reaches a horizontal state.

6. The outrigger assembly testing fixture according to claim 3, characterized in that, The load component (2) includes: Protective sleeve (21) is fitted over the platform structure; The counterweight (22) is placed on the protective sleeve (21).

7. The outrigger assembly testing fixture according to claim 6, characterized in that, The protective sleeve (21) is provided with a positioning structure (211) for positioning the counterweight (22).

8. The outrigger assembly testing fixture according to any one of claims 1 to 7, characterized in that, It also includes a displacement detection module (4), which is disposed on the load component (2) and is used to detect the height change of the arm body away from the bushing.

9. The testing fixture for the outrigger assembly according to claim 1, characterized in that, The arm assembly includes two bushings, and the base (1) is provided with two mounting seats (11), which are used to fix the two bushings respectively.

10. The testing fixture for the outrigger assembly according to claim 1, characterized in that, The base (1) includes: The base plate (12) is provided with mounting holes for connecting the platform; Two reinforcing side plates (13) are disposed opposite to each other on the base plate (12); Mounting plate (14) is disposed on the base plate (12) and located between the two reinforcing side plates (13); The mounting base (11) is disposed on the mounting plate (14).

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