Load loading device, load test device, load test method, controller and control system

Abstract

The invention provides a load loading device, a load test device, a load test method, a controller and a control system. The load loading device comprises a bottom plate, a loading tool and a loading mechanism, the bottom plate is used for placing a test element, and the loading tool is connected with the test element; the loading mechanism comprises an X-direction loading assembly, a Y-direction loading assembly and a Z-direction loading assembly; the X-direction loading assembly is connected with the first end of the loading tool and is used for applying an X-direction load to the test element; the Y-direction loading assembly is connected with the second end of the loading tool and is used for applying a Y-direction load to the test element; and the Z-direction loading assembly is connected with the third end of the loading tool and is used for applying a Z-direction load to the test element. According to the invention, the loading loads in the X direction, the Y direction and the Z direction can be conveniently regulated and controlled, so that the loading forces in the three directions can be simultaneously loaded on the loading tool, and the collected real load of a test element can be accurately reproduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of bushing durability testing, and in particular relates to a load loading device, a load testing device, a method, a controller and a control system. Background Art

[0002] At present, the bushing durability test is mostly carried out with single-stage sinusoidal load or multi-stage sinusoidal load, and the loading load is mostly derived from the decomposed load, not the actual measurement. If there is a deviation in the model establishment or an error in the load decomposition parameter, the force load of the bushing will be inaccurate. At the same time, since the durability life of rubber components such as bushings is greatly correlated with the loading frequency of the load they bear, the precise control of the loading load, the simultaneous loading of three-axis forces on the same part and the collection of their true load and frequency are problems that must be solved in the bushing durability test technology.

[0003] The existing load-loading device is not accurate enough in controlling the loading load. After collecting the real three-axis forces (Fx, Fy, Fz) acting on the bushing, it is impossible to realize simultaneous loading on the same part. Moreover, it is impossible to collect the real stress conditions of the bushing in actual work, and it is impossible to obtain the actual load spectrum of the bushing. The accuracy of the bushing durability performance verification is poor. Summary of the invention

[0004] The present invention provides a load loading device, a load testing device, a method, a controller and a control system to solve the problem that the existing load loading device is not accurate enough in regulating the loading load and the load forces in three directions cannot be loaded simultaneously on the same part.

[0005] A load loading device comprises a base plate, a loading tool and a loading mechanism;

[0006] The bottom plate is used to place the test element, and the loading fixture is connected to the test element;

[0007] The loading mechanism includes an X-direction loading component, a Y-direction loading component and a Z-direction loading component;

[0008] The X-direction loading assembly is connected to the first end of the loading fixture and is used to apply an X-direction load to the test element;

[0009] The Y-direction loading assembly is connected to the second end of the loading fixture, and is used to apply a Y-direction load to the test element;

[0010] The Z-direction loading assembly is connected to the third end of the loading fixture and is used to apply a Z-direction load to the test element.

[0011] Preferably, the loading tooling comprises a first connecting member and a second connecting member;

[0012] The first connecting member includes a connecting body and a first connecting portion and a second connecting portion extending from two sides of the connecting body in mutually perpendicular directions, the first connecting portion is connected to the X-direction loading assembly, and the second connecting portion is connected to the Y-direction loading assembly;

[0013] The second connecting member is arranged on the connecting body along the Z direction, and is used for connecting the Z-direction loading assembly.

[0014] Preferably, the loading tool further comprises a third connecting member;

[0015] The third connecting member is arranged on the connecting body along the Z direction, and the second connecting member is assembled on the third connecting member.

[0016] Preferably, a receiving groove is provided on the second connecting member; and the Z-direction loading assembly is installed in the receiving groove.

[0017] Preferably, the X-direction loading assembly, the Y-direction loading assembly and the Z-direction loading assembly each include a load loading actuator and a load force transmission assembly;

[0018] The load loading actuator is mounted on a support frame and connected to the loading fixture via a load force transmission component; the load force transmission component includes a cross-coupling force application unit and an elastic connection unit that are staggered and connected.

[0019] Preferably, the cross-coupling force-applying unit comprises a tetrahedron, and a fourth connecting member and a fifth connecting member respectively extending from two mutually perpendicular sides of the tetrahedron;

[0020] The fourth connecting member is connected to the elastic connecting unit, and the fifth connecting member is connected to the loading tooling;

[0021] Alternatively, the fourth connecting member is connected to the load loading actuator, and the fifth connecting member is connected to the elastic connecting unit.

[0022] Preferably, the elastic connection unit is configured as a rectangular elastic connection member, one side of the rectangular elastic connection member is connected to the cross-coupling force application unit, and the other side of the rectangular elastic connection member is connected to the load loading actuator;

[0023] Alternatively, one side of the rectangular elastic connector is connected to the loading fixture, and the other side of the rectangular elastic connector is connected to the cross-coupling force application unit.

[0024] Preferably, at least one of the X-direction loading assembly, the Y-direction loading assembly and the Z-direction loading assembly further comprises a linear loading connection unit, and the linear loading connection unit is installed between the loading fixture and the cross-coupling force application unit;

[0025] Alternatively, the linear loading connection unit is installed between the loading fixture and the elastic connection unit.

[0026] Preferably, the linear loading connection unit comprises a long strip-shaped main body, a sixth connection member connected to one side of the main body, and a seventh connection member connected to the other side of the main body, and the sixth connection member and the seventh connection member are perpendicular to each other;

[0027] The sixth connecting member is connected to the cross-coupling force applying unit, and the seventh connecting member is connected to the loading tooling;

[0028] Alternatively, the sixth connecting member is connected to the elastic connecting unit, and the seventh connecting member is connected to the loading tooling.

[0029] Preferably, the X-direction loading assembly, the Y-direction loading assembly and the Z-direction loading assembly further include linear guide rails, the linear guide rails are mounted on the support frame, and the load loading actuator is mounted in the linear guide rails.

[0030] The present invention provides a load testing device to solve the problems that the existing load testing device cannot collect the real stress condition of the bushing in actual work, cannot obtain the actual load spectrum of the bushing, and the accuracy of bushing durability performance verification is poor.

[0031] A load test device, comprising the load loading device and the data acquisition device;

[0032] The data acquisition device is mounted on the test element;

[0033] The loading fixture of the load loading device is assembled on the data acquisition device.

[0034] Preferably, the data acquisition device is a three-force sensor, which includes a sensor body and a first connection plate and a second connection plate fixed at two ends of the sensor body;

[0035] The first connection plate is connected to the test element, and the second connection plate is connected to the receiving member, and is used to collect the actual stress condition of the test element; or, the second connection plate is connected to the loading tooling, and is used to perform a load endurance test on the test element.

[0036] Preferably, a plurality of energy absorbing holes are provided on the circumference of the sensor body.

[0037] A test method is applicable to a load endurance test of a control arm, wherein the control arm includes a bushing portion and a main body portion, and includes:

[0038] A data acquisition device is arranged between the bushing part and the main body part to collect a stress load spectrum of the bushing part;

[0039] Acquiring a target signal according to the force load spectrum;

[0040] According to the target signal, the load loading device is controlled to operate.

[0041] Preferably, acquiring a target signal according to the force load spectrum includes:

[0042] According to the stress load spectrum of the bushing part, obtaining stress data in three directions;

[0043] Generate target signals in three directions based on the force data in three directions

[0044] Preferably, controlling the load loading device to work according to the target signal comprises:

[0045] Obtaining the initial loading coupling state of the load loading device in three directions;

[0046] Controlling the loading mechanism to work and obtaining the termination loading coupling state of the load loading device in three directions;

[0047] acquiring a transfer function model according to the termination loading coupling state;

[0048] Importing the target signal into the transfer function model, and loading out a driving signal corresponding to the target signal;

[0049] According to the driving signal, the load applying device is controlled to work and apply load to the test element.

[0050] A controller comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the test method as described above when executing the computer program.

[0051] A control system, characterized by comprising the load testing device and the controller.

[0052] In the present invention, the bottom plate is used as a base, and a sample installation tool is arranged on the bottom plate for placing the test element. The sample installation tool can ensure that the test element is fixed stably and firmly without sliding, thereby avoiding affecting the accuracy of the test. The loading tool is connected to the test element, and the loading mechanism applies a load to the test element through the loading tool. Specifically, the loading mechanism includes an X-direction loading component, a Y-direction loading component and a Z-direction loading component. The X-direction loading component is connected to the first end of the loading tooling and is used to apply an X-direction load to the test element. The Y-direction loading component is connected to the second end of the loading tooling and is used to apply a Y-direction load to the test element. The Z-direction loading component is connected to the third end of the loading tooling and is used to apply a Z-direction load to the test element. The loading tooling is arranged in such a way that it cooperates with the X-direction loading component, the Y-direction loading component and the Z-direction loading component, which facilitates the regulation of the loading loads in the X-direction, Y-direction and Z-direction directions, so that the load forces in the three directions are simultaneously loaded on the loading tooling, and the real load of the collected test element can be accurately reproduced, and the actual load spectrum of the test element can be more accurately obtained, thereby ensuring the accuracy of the durability performance verification and improving the practicability of the load loading device.

[0053] In this example, the test element is set as a bushing, and the bushing is placed on the base plate. The loading mechanism applies load to the bushing through the loading fixture. The loading fixture cooperates with the X-direction loading component, the Y-direction loading component and the Z-direction loading component to facilitate the regulation of the loading loads in the X-direction, Y-direction and Z-direction, so that the load forces in the three directions can be loaded simultaneously on the loading fixture. The real load of the bushing collected can be accurately reproduced, and the actual load spectrum of the bushing can be obtained more accurately, thereby realizing real-time feedback and closed-loop control of the stress state reproduction. Under the test conditions at the component level, the verification of the vehicle-level durability test is completed, the problem of inconsistent faults between component tests and vehicle tests is solved, the development efficiency is improved, and the effect of component verification replacing vehicle verification can be achieved, saving development costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 is an isometric view of a load applying device in the present invention;

[0055] Figure 2 is an isometric view of the loading tooling of the present invention;

[0056] Figure 3 is an isometric view of a cross-coupled force-applying unit in the present invention;

[0057] Figure 4 is an isometric view of the elastic connection unit of the present invention;

[0058] Figure 5 is an isometric view of a linear loading connection unit in the present invention;

[0059] Figure 6 is an axonometric view of a control arm in the present invention;

[0060] Figure 7 is an isometric view of the three-force sensor of the present invention;

[0061] Figure 8 It is an assembly diagram of the bushing part and the three-force sensor in the present invention;

[0062] Fig. 9 It is a step diagram of the test method in the present invention;

[0063] Fig.10 yes Fig. 9 A step diagram in ;

[0064] Fig.11 yes Fig. 9 Another step diagram in .

[0065] Among them, 1. bottom plate; 2. loading tooling; 21. first connecting member; 211. connecting body; 212. first connecting part; 213. second connecting part; 22. second connecting member; 23. third connecting member; 3. loading mechanism; 31. X-direction loading assembly; 32. Y-direction loading assembly; 33. Z-direction loading assembly; 4. accommodating groove; 5. load loading actuator; 6. load force transmission assembly; 61. elastic connection unit; 62. cross-coupling force application unit; 621. four sides Body; 622, fourth connecting piece; 623, fifth connecting piece; 7, support frame; 8, linear loading connection unit; 81, main body; 82, sixth connecting piece; 83, seventh connecting piece; 9, linear guide rail; 10, three-way force sensor; 101, sensor body; 102, first connecting plate; 103, second connecting plate; 104, energy absorption hole; 11, control arm; 111, bushing part; 112, main body; 12, sample installation tooling; 13, controller. DETAILED DESCRIPTION

[0066] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0067] In the description of the present invention, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0068] In the description of the present invention, it should be noted that, 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 indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] The embodiment of the present invention provides a load loading device, referring to Figure 1 and Figure 2 The load loading device includes a base plate 1, a loading fixture 2 and a loading mechanism 3; the base plate 1 is used to place the test element, and the loading fixture 2 is connected to the test element; the loading mechanism 3 includes an X-direction loading component 31, a Y-direction loading component 32 and a Z-direction loading component 33; the X-direction loading component 31 is connected to the first end of the loading fixture 2, and is used to apply an X-direction load to the test element; the Y-direction loading component 32 is connected to the second end of the loading fixture 2, and is used to apply a Y-direction load to the test element; the Z-direction loading component 33 is connected to the third end of the loading fixture 2, and is used to apply a Z-direction load to the test element.

[0070] As an example, the bottom plate 1 is used as a base, and a sample installation tool 12 is provided on the bottom plate 1 for placing the test element. The sample installation tool 12 can ensure that the test element is fixed stably and securely without sliding, thereby avoiding affecting the accuracy of the test. The loading tool 2 is connected to the test element, and the loading mechanism 3 applies a load to the test element through the loading tool 2. Specifically, the loading mechanism 3 includes an X-direction loading component 31, a Y-direction loading component 32 and a Z-direction loading component 33. The X-direction loading component 31 is connected to the first end of the loading tool 2, and is used to apply an X-direction load to the test element. The Y-direction loading component 32 is connected to the second end of the loading tool 2, and is used to apply a Y-direction load to the test element. The Z-direction loading component 33 is connected to the third end of the loading tool 2, and is used to apply a Z-direction load to the test element. The loading tool 2 is arranged to cooperate with the X-direction loading component 31, the Y-direction loading component 32 and the Z-direction loading component 33, which is convenient for regulating the loading loads in the X-direction, Y-direction and Z-direction directions, so that the load forces in the three directions are loaded simultaneously on the loading tool 2, which can accurately reproduce the real load of the collected test element, more accurately obtain the actual load spectrum of the test element, ensure the accuracy of durability performance verification, and improve the practicability of the load loading device.

[0071] In this example, the test element is set as a bushing, and the bushing is placed on the base plate 1. The loading mechanism 3 applies a load to the bushing through the loading fixture 2. The loading fixture 2 cooperates with the X-direction loading component 31, the Y-direction loading component 32 and the Z-direction loading component 33 to facilitate the regulation of the loading loads in the X-direction, Y-direction and Z-direction, so that the load forces in the three directions can be loaded simultaneously on the loading fixture 2, and the real load of the bushing collected can be accurately reproduced, and the actual load spectrum of the bushing can be obtained more accurately, thereby realizing real-time feedback and closed-loop control of the stress state reproduction, and completing the verification of the vehicle-level durability test under the component-level test conditions, solving the problem of inconsistent faults between component tests and vehicle tests, improving development efficiency, and achieving the effect of component verification replacing vehicle verification, saving development costs.

[0072] In one embodiment, referring to Figure 2 The loading tooling 2 includes a first connecting member 21 and a second connecting member 22; the first connecting member 21 includes a connecting body 211 and a first connecting portion 212 and a second connecting portion 213 extending from both sides of the connecting body 211 in mutually perpendicular directions, the first connecting portion 212 is connected to the X-direction loading assembly 31, and the second connecting portion 213 is connected to the Y-direction loading assembly 32; the second connecting member 22 is arranged on the connecting body 211 along the Z-direction, and is used to connect the Z-direction loading assembly 33.

[0073] As an example, the loading tool 2 includes a first connecting member 21 and a second connecting member 22. The first connecting member 21 includes a connecting body 211, a first connecting portion 212 and a second connecting portion 213. The connecting body 211 serves as a substrate and is connected to the test element. The first connecting portion 212 and the second connecting portion 213 extend from both sides of the connecting body 211 in mutually perpendicular directions, that is, the first connecting portion 212 and the second connecting portion 213 are perpendicular to each other; a connecting hole is provided on the first connecting portion 212, and a fastener acts in the connecting hole to facilitate connecting the X-axis loading assembly 31 to the first connecting portion 212; a connecting hole is provided on the second connecting portion 213, and a fastener is fastened to the connecting hole to facilitate connecting the X-axis loading assembly 31 to the first connecting portion 212; a connecting hole is provided on the second connecting portion 213, and a fastener is fastened to the connecting hole to facilitate connecting the X-axis loading assembly 31 to the first connecting portion 212. The part acts in the connecting hole, which is convenient for connecting the Y-direction loading component 32 with the second connecting part 213; the second connecting part 22 is arranged on the connecting body 211 along the Z direction, and is used to connect the Z-direction loading component 33. The first connecting part 212, the second connecting part 213 and the second connecting part 22 concentrate the loading loads in the X direction, Y direction and Z direction on the connecting body 211, and then transmit them to the test element, so that the load forces in the three directions are loaded on the loading fixture 2 at the same time, which can accurately reproduce the real load of the test element collected, more accurately obtain the actual load spectrum of the test element, ensure the accuracy of durability performance verification, and improve the practicability of the load loading device.

[0074] In one embodiment, referring to Figure 2 The loading tool 2 also includes a third connecting member 23 ; the third connecting member 23 is arranged on the connecting body 211 along the Z direction, and the second connecting member 22 is assembled on the third connecting member 23 .

[0075] As an example, the loading tool 2 also includes a third connecting member 23, which is arranged on the connecting body 211 along the Z direction, and the third connecting member 23 is arranged between the first connecting member 21 and the second connecting member 22. The third connecting member 23 of different lengths can be set according to actual needs, so that a certain distance is maintained between the second connecting member 22 and the first connecting member 21 to avoid interference between the X-direction loading component 31, the Y-direction loading component 32 and the Z-direction loading component 33 when the loading tool 2 is connected; the third connecting member 23 can be set as a cross-shaped connecting member, so that the third connecting member 23 can reduce production materials while achieving supporting strength.

[0076] In one embodiment, referring to Figure 2 The second connecting member 22 is provided with a receiving groove 4 ; the Z-direction loading assembly 33 is installed in the receiving groove 4 .

[0077] As an example, the second connecting member 22 includes a rectangular connecting body, a third connecting portion and a fourth connecting portion extending in the same direction from opposite side edges of one side of the connecting body, and the connecting body, the third connecting portion and the fourth connecting portion cooperate to form a receiving groove 4 for an empty Z-direction loading component 33; connecting holes are provided on the third connecting portion and the fourth connecting portion, and the connecting holes on the two corresponding to each other, and the fasteners act in the two relatively arranged connecting holes to securely fix the Z-direction loading component 33 in the receiving groove 4; the Z-direction loading component 33 is installed in the receiving groove 4 of the second connecting member 22 to ensure that the installation of the Z-direction loading component 33 is more secure and safe.

[0078] In one embodiment, referring to Figure 1-5 The X-direction loading component 31, the Y-direction loading component 32 and the Z-direction loading component 33 all include a load loading actuator 5 and a load force transmission component 6; the load loading actuator 5 is assembled on a support frame 7 and is connected to the loading tooling 2 through a load force transmission component 6; the load force transmission component 6 includes an interlaced cross-coupling force unit 62 and an elastic connection unit 61.

[0079] Among them, the cross-coupling force unit 62 has two mutually perpendicular connecting plates, one of the two connecting plates is used to bear the force in the horizontal direction, and the other is used to bear the force in the vertical direction. The forces in two different directions can be converted on the cross-coupling force unit 62, and the cross-coupling force transmitted by the load loading actuator 5 can be well transmitted; the elastic connection unit 61 is a connecting plate that can be deformed. When it is subjected to the loading force, it can offset the displacement of the loading force through its own deformation, thereby meeting the load output by the load loading actuator 5.

[0080] As an example, the load transmission component 6 includes a cross-coupling force unit 62 and an elastic connection unit 61 connected in sequence. The cross-coupling force unit 62 can well transmit the cross-coupling force transmitted by the load loading actuator 5; the elastic connection unit 61 is both rigid and elastic, and the load output by the load loading actuator 5 can be adjusted by changing its own stiffness.

[0081] The X-direction support frame 7 adopts a guide rail mounting column and is placed in the X-direction of the base plate 1. The load loading actuator 5 is assembled on the guide rail mounting column, one end of which is connected to the first end of the elastic connection unit 61, the second end of the elastic connection unit 61 is connected to the first end of the cross-coupling force unit 62, the second end of the cross-coupling force unit 62 is connected to the first connection part 212 of the loading tooling 2, and the cross-coupling force unit 62 transmits the cross-coupling force transmitted by the load loading actuator 5; the elastic connection unit 61 changes its own stiffness to adjust the load output by the load loading actuator 5, thereby changing the load applied to the loading tooling 2 in the X-direction. The Y-direction support frame 7 adopts a guide rail mounting column and is placed in the Y-direction of the base plate 1. The load loading actuator 5 is assembled on the guide rail mounting column, one end of which is connected to the first end of the elastic connection unit 61, the second end of the elastic connection unit 61 is connected to the first end of the cross-coupling force unit 62, the second end of the cross-coupling force unit 62 is connected to the second connection part 213 of the loading tooling 2, and the cross-coupling force unit 62 transmits the cross-coupling force transmitted by the load loading actuator 5; the elastic connection unit 61 changes its own stiffness to adjust the load output by the load loading actuator 5, thereby changing the load applied to the loading tooling 2 in the Y direction. The Z-direction support frame 7 adopts a gantry and is placed in the Z-direction of the base plate 1, corresponding to the test element. The load loading actuator 5 is assembled on the gantry, one end of which is connected to the first end of the elastic connection unit 61, the second end of the elastic connection unit 61 is connected to the first end of the cross-coupling force unit 62, the second end of the cross-coupling force unit 62 is connected to the second connecting piece 22 of the loading tooling 2, and the cross-coupling force unit 62 transmits the cross-coupling force transmitted by the load loading actuator 5; the elastic connection unit 61 changes its own stiffness to adjust the load output by the load loading actuator 5, thereby changing the load applied to the loading tooling 2 in the Z direction.

[0082] In another example, the load transmission assembly 6 includes an elastic connection unit 61 and a cross-coupling force unit 62 connected in sequence, that is, the positions of the elastic connection unit 61 and the cross-coupling force unit 62 are interchangeable with those of the previous example. The support frame 7 in the X direction adopts a guide rail mounting column and is placed in the X direction of the base plate 1. The load loading actuator 5 is assembled on the guide rail mounting column, one end of which is connected to the first end of the cross-coupling force unit 62, the second end of the cross-coupling force unit 62 is connected to the first end of the elastic connection unit 61, and the second end of the elastic connection unit 61 is connected to the first connection portion 212 of the loading fixture 2. The cross-coupling force unit 62 transmits the cross-coupling force transmitted by the load loading actuator 5; the elastic connection unit 61 changes its own stiffness to adjust the load output by the load loading actuator 5, thereby changing the load applied to the loading fixture 2 in the X direction. The Y-direction support frame 7 adopts a guide rail mounting column and is placed in the Y-direction of the base plate 1. The load loading actuator 5 is assembled on the guide rail mounting column, one end of which is connected to the first end of the cross-coupling force unit 62, the second end of the cross-coupling force unit 62 is connected to the first end of the elastic connection unit 61, the second end of the elastic connection unit 61 is connected to the second connection part 213 of the loading tooling 2, and the cross-coupling force unit 62 transmits the cross-coupling force transmitted by the load loading actuator 5; the elastic connection unit 61 changes its own stiffness to adjust the load output by the load loading actuator 5, thereby changing the load applied to the loading tooling 2 in the Y direction. The support frame 7 in the Z direction adopts a gantry frame and is placed in the Z direction of the base plate 1, corresponding to the test element. The load loading actuator 5 is assembled on the gantry frame, one end of which is connected to the first end of the cross-coupling force unit 62, the second end of the cross-coupling force unit 62 is connected to the first end of the elastic connection unit 61, the second end of the elastic connection unit 61 is connected to the second connection piece 22 of the loading fixture 2, and the cross-coupling force unit 62 transmits the cross-coupling force transmitted by the load loading actuator 5; the elastic connection unit 61 changes its own stiffness to adjust the load output by the load loading actuator 5, thereby changing the load applied to the loading fixture 2 in the Z direction

[0083] This arrangement facilitates the regulation of the loading loads in the X, Y and Z directions. The cross-coupling force unit 62 transmits the cross-coupling force transmitted by the load loading actuator 5; the elastic connection unit 61 changes its own stiffness to adjust the load output by the load loading actuator 5, so that the decoupling effect of the three directions of X, Y and Z on the loading fixture 2 reaches the best state, that is, the three directions have the least mutual influence, so that the load forces in the three directions can be loaded simultaneously on the loading fixture 2, which can accurately reproduce the real load of the collected test element, more accurately obtain the actual load spectrum of the test element, ensure the accuracy of durability performance verification, and improve the practicability of the load loading device.

[0084] In one embodiment, referring to Figure 3The cross-coupling force unit 62 includes a tetrahedron 621, a fourth connecting member 622 and a fifth connecting member 623 extending from two mutually perpendicular sides of the tetrahedron 621; the fourth connecting member 622 is connected to the elastic connecting unit 61, and the fifth connecting member 623 is connected to the loading tooling 2, or the fourth connecting member 622 is connected to the load loading actuator 5, and the fifth connecting member 623 is connected to the elastic connecting unit 61.

[0085] As an example, a cross-coupling force unit 62 is introduced, which includes a tetrahedron 621, a fourth connecting member 622 and a fifth connecting member 623. The fourth connecting member 622 and the fifth connecting member 623 are respectively extended from two mutually perpendicular sides of the tetrahedron 621, that is, the fourth connecting member 622 and the fifth connecting member 623 are two mutually perpendicular connecting plates, one of which is used to bear the force in the horizontal direction, and the other is used to bear the force in the vertical direction. The forces in two different directions can be converted on the cross-coupling force unit 62, and the cross-coupling force transmitted by the load loading actuator 5 can be well transmitted. The fourth connecting member 622 is connected to the elastic connecting unit 61, and the fifth connecting member 623 is connected to the loading fixture 2. In this arrangement, the elastic connecting unit 61 first changes its own strength to adjust the load output by the load loading actuator 5, and then the fourth connecting member 622, the tetrahedron 621 and the fifth connecting member 623 transmit the cross-coupling force transmitted by the load loading actuator 5 to the loading fixture 2, so as to change the load applied to the loading fixture 2. The cross-coupling force-applying unit 62 arranged in this way is convenient for adjusting the test device to meet the installation requirements. Alternatively, the fourth connecting member 622 is connected to the load loading actuator 5, and the fifth connecting member 623 is connected to the elastic connecting unit 61. The fourth connecting member 622, the tetrahedron 621 and the fifth connecting member 623 transmit the cross-coupling force transmitted by the load loading actuator 5 to the elastic connecting unit 61, and the elastic connecting unit 61 changes its own strength to adjust the load output by the load loading actuator 5, which can also achieve the above functions. The fourth connecting member 622 is provided with a connecting hole, and the fastener acts in the connecting hole, so as to facilitate the connection of the fourth connecting member 622 with the elastic connecting unit 61 or the load loading actuator 5; the fifth connecting member 623 is provided with a connecting hole, and the fastener acts in the connecting hole, so as to facilitate the connection of the fifth connecting member 623 with the loading fixture 2 or the elastic connecting unit 61. The elastic connecting unit 61 is connected to the fourth connecting member 622 or the fifth connecting member 623, and is a connecting plate that can be deformed. When it is subjected to a loading force, it can offset the displacement of the loading force through its own deformation, thereby satisfying the load output by the load loading actuator 5.

[0086] In one embodiment, referring to Figure 4The elastic connection unit 61 is set as a rectangular elastic connection member, one side of the rectangular elastic connection member is connected to the cross-coupling force unit 62, and the other side of the rectangular elastic connection member is connected to the load loading actuator 5, or one side of the rectangular elastic connection member is connected to the loading tooling 2, and the other side of the rectangular elastic connection member is connected to the cross-coupling force unit 62.

[0087] As an example, it is introduced that the elastic connection unit 61 is set as a rectangular elastic connection member, and the stiffness is adjusted evenly, which is convenient for adjusting the load output by the load loading actuator 5. A connection hole is provided on one side of the rectangular elastic connection member, and a fastener acts in the connection hole, which is convenient for connecting the cross-coupling force-applying unit 62 with one side of the rectangular elastic connection member. A connection hole is also provided on the other side of the rectangular elastic connection member, and a fastener acts in the connection hole, which is convenient for connecting the load loading actuator 5 with one side of the rectangular elastic connection member. The rectangular elastic connection member changes its own strength to adjust the load output by the load loading actuator 5, and then transmits the cross-coupling force transmitted by the load loading actuator 5 to the loading fixture 2 through the cross-coupling force-applying unit 62, thereby applying a load to the loading fixture 2. Alternatively, one side of the rectangular elastic connector is connected to the loading tooling 2, and the other side of the rectangular elastic connector is connected to the cross-coupling force-applying unit 62. The cross-coupling force transmitted by the load loading actuator 5 is first transmitted to the rectangular elastic connector via the cross-coupling force-applying unit 62. The rectangular elastic connector changes its own strength and adjusts the load output by the load loading actuator 5. The rectangular elastic connector has both a certain rigidity and a certain elasticity, which is convenient for adjusting the test device, and the arrangement direction of the rectangular elastic connector is interchangeable, and the arrangement is flexible to meet installation requirements.

[0088] In one embodiment, referring to Figure 5 At least one of the X-axis loading component 31, the Y-axis loading component 32 and the Z-axis loading component 33 also includes a linear loading connection unit 8, which is installed between the loading tooling 2 and the cross-coupling force unit 62; or, the linear loading connection unit 8 is installed between the loading tooling 2 and the elastic connection unit 61.

[0089] As an example, it is introduced that at least one of the X-direction loading assembly 31, the Y-direction loading assembly 32 and the Z-direction loading assembly 33 further includes a linear loading connection unit 8, which is used to connect the loading fixture 2 and the cross-coupling force unit 62; or, the linear loading connection unit 8 is installed between the loading fixture 2 and the elastic connection unit 61, and the linear loading connection unit 8 is easy to replace after it breaks, ensuring that the cross-coupling force unit 62 or the elastic connection unit 61 can effectively apply the load to the loading fixture 2. In this example, the linear loading connection unit 8 is set on the X-direction loading assembly 31 and the Y-direction loading assembly 32, so as to effectively transfer the load in the X-direction and Y-direction directions to the loading fixture 2.

[0090] In one embodiment, referring to Figure 7 The linear loading connection unit 8 includes a long strip main body 81, a sixth connection member 82 connected to one side of the main body 81, and a seventh connection member 83 connected to the other side of the main body 81, and the sixth connection member 82 and the seventh connection member 83 are perpendicular to each other; the sixth connection member 82 is connected to the cross-coupling force unit 62, and the seventh connection member 83 is connected to the loading tooling 2; or, the sixth connection member 82 is connected to the elastic connection unit 61, and the seventh connection member 83 is connected to the loading tooling 2.

[0091] As an example, the linear loading connection unit 8 includes a main body 81, a sixth connection member 82 and a seventh connection member 83. The main body 81 is set to be long strip, the sixth connection member 82 is connected to one side of the main body 81, and the seventh connection member 83 is connected to the other side of the main body 81 away from the sixth connection member 82. In this example, a mounting groove is provided at each end of the long strip main body 81, and the two mounting grooves are opened in opposite directions and perpendicular to each other; the sixth connection member 82 and the seventh connection member 83 are respectively arranged in the two mounting grooves of the main body 81, so that the sixth connection member 82 and the seventh connection member 83 are perpendicular to each other. The seventh connection member 83 is connected to the loading tool 2, the sixth connection member 82 is connected to the cross-coupling force unit 62 or the elastic connection unit 61, and the sixth connection member 82 and the seventh connection member 83 are perpendicular to each other, which is convenient for dislocation connection of the loading assembly with the loading tool 2 to avoid installation conflict. When the linear loading connection unit 8 is broken, it is convenient to replace the linear loading connection unit 8 to ensure that the loading assembly can effectively apply the load to the loading tool 2.

[0092] In one embodiment, referring to Figure 1 At least one of the X-direction loading assembly 31 , the Y-direction loading assembly 32 and the Z-direction loading assembly 33 further includes a linear guide rail 9 , the linear guide rail 9 is mounted on the support frame 7 , and the load loading actuator 5 is mounted in the linear guide rail 9 .

[0093] As an example, it is introduced that at least one of the X-direction loading component 31, the Y-direction loading component 32 and the Z-direction loading component 33 also includes a linear guide rail 9, and a linear guide rail 9 is respectively installed on the three support frames 7 in the X-direction, Y-direction and Z-direction. The load loading actuator 5 is installed in the linear guide rail 9. The position of the load loading actuator 5 can be adjusted through the linear guide rail 9, and the loading loads in the three directions of X-direction, Y-direction and Z-direction can be further adjusted to improve the practicality of the equipment.

[0094] The embodiment of the present invention provides a load test device, referring to Figure 1-8 , including a load loading device and a data acquisition device; the data acquisition device is assembled on the test element; the loading tool 2 in the load loading device is assembled on the data acquisition device.

[0095] As an example, the bottom plate 1 is used as a base, and a sample installation tool 12 is provided on the bottom plate 1 for placing a test element. The data acquisition device is assembled on the test element. The loading tool 2 in the load loading device is connected to the data acquisition device. The loading mechanism 3 applies a load to the test element through the loading tool 2. The sample installation tool 12 can ensure that the test element is fixed stably and firmly without sliding, thereby avoiding affecting the accuracy of the test. Among them, the X-direction loading component 31 is connected to the first end of the loading tool 2 for applying an X-direction load to the test element, and the Y-direction loading component 32 is connected to the second end of the loading tool 2 for applying a Y-direction load to the test element. The Z-direction loading component 33 is connected to the third end of the loading fixture 2, and is used to apply a Z-direction load to the test element. The loading fixture 2 is arranged in such a way to cooperate with the X-direction loading component 31, the Y-direction loading component 32 and the Z-direction loading component 33, so as to facilitate the regulation of the loading loads in the X-direction, the Y-direction and the Z-direction, so that the load forces in the three directions can be loaded on the loading fixture 2 simultaneously. In conjunction with the data acquisition device, the stress conditions of the test element can be collected, including parameters such as load size, frequency, and phase, so that the real load of the collected test element can be accurately reproduced, and the actual load spectrum of the test element can be more accurately obtained, thereby ensuring the accuracy of the durability performance verification.

[0096] In one embodiment, referring to Figure 1 and Figure 7 The data acquisition device is a three-force sensor 10, which includes a sensor body 101 and a first connecting plate 102 and a second connecting plate 103 fixed at both ends of the sensor body 101; the first connecting plate 102 is connected to the test element, and the second connecting plate 103 is connected to the receiving part, which is used to collect the actual force condition of the test element; or, the second connecting plate 103 is connected to the loading tool 2, which is used to perform a load endurance test on the test element.

[0097] As an example, the test element is the element to be tested, such as a bushing; the receiving part is the element used to bear the load force in actual use, such as the control arm 11. The receiving part and the test element are an integrated structure and are modified into two parts. In order to collect the actual force conditions of the test element, the data acquisition device is a three-force sensor 10. The three-force sensor 10 includes a sensor body 101, a first connecting disk 102 and a second connecting disk 103. The first connecting disk 102 and the second connecting disk 103 are respectively arranged at both ends of the sensor body 101. The first connecting disk 102 is connected to the test element, and the second connecting disk 103 is connected to the receiving part; the connected test element and the receiving part are installed on the test equipment, so that the actual force data of the test element can be collected, including parameters such as load size, frequency, and phase, and the real load spectrum of the test element can be obtained, thereby improving the accuracy of the durability performance verification of the test element; then use The first connecting disk 102 is connected to the test element, and the second connecting disk 103 is connected to the loading fixture 2. In this way, the three-force sensor 10 can accurately collect the load applied to the test element by the loading mechanism 3 through the loading fixture 2, which is convenient for regulating the loading loads in the X direction, the Y direction and the Z direction, so that the load forces in the three directions can be loaded simultaneously on the loading fixture 2. In conjunction with the data acquisition device, the force condition of the test element, including parameters such as load size, frequency, and phase, can be collected. The real load of the collected test element can be accurately reproduced, and the actual load spectrum of the test element can be obtained more accurately, thereby ensuring the accuracy of the durability performance verification. The first connecting disk 102 and the second connecting disk 103 are both provided with mounting holes. By fasteners acting on the mounting holes, the three-force sensor 10 can be conveniently installed between the test element and the loading fixture 2 or between the test element and the receiving part, thereby providing convenience for conducting tests.

[0098] In one embodiment, referring to Figure 7 A plurality of energy absorbing holes 104 are provided on the circumference of the sensor body 101 .

[0099] As an example, a plurality of energy absorption holes 104 are provided on the circumference of the sensor body 101. The plurality of energy absorption holes 104 can effectively absorb the load applied by the loading mechanism 3, expand the bearing capacity range of the three-force sensor 10, and thus enable the three-force sensor 10 to collect force more accurately.

[0100] The present invention provides a test method, referring to Fig. 9 , which is suitable for carrying out a load endurance test on a control arm 11, wherein the control arm 11 includes a bushing portion 111 and a main body portion 112, including:

[0101] S901: placing a data acquisition device between the bushing portion 111 and the main body portion 112 to collect a stress load spectrum of the bushing portion 111;

[0102] S902: Obtaining a target signal according to the force load spectrum;

[0103] S903: Control the load loading device to operate according to the target signal.

[0104] The control arm 11 is modified, and includes a bushing portion 111 and a main body portion 112 . The data acquisition device is a three-force sensor 10 .

[0105] Among them, the target signal refers to a command signal used to control the load-loading device to work under different working conditions. As an example, the target signal can be obtained by filtering and denoising according to the forces in three directions of the bushing part 111. In this example, the working conditions of the load-loading device are different, and the loads applied to the bushing part 111 are different. It is possible to adjust the loading loads in the X direction, Y direction and Z direction, so that the load forces in three directions can be loaded simultaneously on the loading fixture 2. With the data acquisition device, the force conditions of the test element can be collected, including load size, frequency, phase and other parameters. The real load of the collected test element can be accurately reproduced, and the actual load spectrum of the test element can be obtained more accurately, ensuring the accuracy of the durability performance verification.

[0106] The existing bushing is an important component of automobile suspension and an important factor affecting the comfort and safety of the whole vehicle. Due to the nonlinear characteristics of its stiffness, the force it is subjected to during the operation of the whole vehicle is quite complex, making it difficult to test the true load of the bushing. During the product development process, there is a situation where the component test failure is inconsistent with the vehicle test failure. In order to solve this problem, a test method is provided.

[0107] As an example, in step S901, before performing a durability test on the bushing part 111, a data acquisition device is first installed between the bushing part 111 and the main body part 112, and the connected bushing test equipment is installed on the test vehicle, so as to collect actual force data of the bushing part 111, including parameters such as load size, frequency, and phase, and obtain the real load spectrum of the bushing part 111.

[0108] As an example, in step S902, force data in three directions are obtained based on the actual load spectrum of the bushing part 111, and then the input force load spectrum is processed using a preset conversion logic to determine a corresponding control signal to facilitate the durability test.

[0109] As an example, in step S903, according to the acquired target signal, the bushing part 111 is subjected to a durability test, the bottom plate 1 is used as a base, and a sample installation tool 12 is provided on the bottom plate 1 for placing the bushing part 111, the data acquisition device is assembled on the bushing part 111, the loading tool 2 is connected to the data acquisition device, and the loading mechanism 3 applies a load to the data acquisition device and the bushing part 111 through the loading tool 2, and the sample installation tool 12 can ensure that the data acquisition device and the bushing part 111 are fixed stably and firmly without sliding, thereby avoiding affecting In order to improve the test accuracy, the loading fixture 2 cooperates with the X-direction loading component 31, the Y-direction loading component 32 and the Z-direction loading component 33 to facilitate the regulation of the loading loads in the X-direction, Y-direction and Z-direction, so that the load forces in the three directions can be loaded simultaneously on the loading fixture 2. In conjunction with the data acquisition device, the stress conditions of the bushing part 111, including parameters such as load size, frequency, and phase, can be collected, the real load of the collected test element can be accurately reproduced, the actual load spectrum of the test element can be obtained more accurately, and the accuracy of the durability performance verification can be guaranteed.

[0110] In this example, the data acquisition device is first installed between the bushing part 111 and the main body part 112, and the connected bushing test equipment is installed on the test vehicle, so as to collect the actual force data of the bushing part 111, including parameters such as load size, frequency, phase, etc., and obtain the real load spectrum of the bushing part 111. According to the real load spectrum of the bushing part 111, the target signal is obtained; then the data acquisition device is installed on the bushing part 111, and the bushing part 111 is placed on the sample installation tool 12 set on the bottom plate 1, and the loading tool 2 is connected to the data acquisition device, and the loading mechanism 3 is connected to the sample installation tool 12 set on the bottom plate 1. The loading fixture 2 applies load to the data acquisition device and the bushing part 111. The loading fixture 2 cooperates with the X-direction loading component 31, the Y-direction loading component 32 and the Z-direction loading component 33 to facilitate the regulation of the loading loads in the X-direction, Y-direction and Z-direction, so that the load forces in three directions can be loaded simultaneously on the loading fixture 2. In conjunction with the data acquisition device, the stress conditions of the bushing part 111 can be collected, including parameters such as load size, frequency, and phase. The real load of the collected test element can be accurately reproduced, and the actual load spectrum of the test element can be more accurately obtained, thereby ensuring the accuracy of the durability performance verification.

[0111] In one embodiment, referring to Fig.10 In step S902, the target signal is obtained according to the force load spectrum, including:

[0112] S9021: Obtain force data in three directions according to the force load spectrum of the bushing part 111;

[0113] S9022: Generate target signals in three directions based on the force data in three directions.

[0114] As an example, in step S9021, the stress condition of the control arm bushing is analyzed by CAE, the modified bushing part 111 is selected, and the corresponding three-force sensor 10 is designed. The processing and manufacturing of the three-force sensor 10 includes machining, heat treatment, strain gauge installation and sensitivity coefficient calibration. The modified bushing part 111 is selected to be cut from the middle of the control arm 11, and is divided into the bushing part 111 and the main body 112. When collecting data, the three-force sensor 10 is installed between the bushing part 111 and the main body 112. When collecting data, the original control arm 11 of the vehicle is removed and the modified control arm 11 is installed. In this way, the modified bushing part 111 and the three-force sensor 10 can collect corresponding test conditions, obtain the stress load spectrum of the bushing part 111, and obtain the stress data in three directions according to the stress load spectrum of the bushing part 111. Among them, the test condition refers to the condition when the modified control arm 11 plus the three-force sensor 10 replaces the original control arm 11 of the vehicle and the vehicle is driving on a road with corresponding conditions.

[0115] Among them, the target signal refers to a command signal used to control the load loading device to work in different working conditions;

[0116] As an example, in step S9022, the force data in three directions are analyzed to generate load force control signals in three directions, and the target signal corresponding to each direction is determined according to the load force control signal in each direction. In this example, the load force control signals in three directions of the bushing part 111 can be filtered and denoised to obtain the target signal corresponding to each direction.

[0117] In this embodiment, before performing a durability test on the bushing part 111, a data acquisition device is first installed between the bushing part 111 and the main body part 112, and the connected bushing test equipment is installed on the test vehicle, so as to collect the actual force data of the bushing part 111, including parameters such as load size, frequency, and phase, and obtain the real load spectrum of the bushing part 111, and then obtain the force data in three directions according to the force load spectrum of the bushing part 111, so as to obtain the target signal.

[0118] In one embodiment, referring to Fig.11 In step S903, according to the target signal, the load loading device is controlled to work, including:

[0119] S9031: Obtaining the initial loading coupling state of the load loading device in three directions;

[0120] S9032: Control the loading mechanism 3 to work, and obtain the termination loading coupling state of the load loading device in three directions;

[0121] S9033: acquiring a transfer function model according to the termination loading coupling state;

[0122] S9034: Importing the target signal into the transfer function model, and loading the driving signal corresponding to the target signal;

[0123] S9035: According to the driving signal, the load loading device is controlled to work and apply load to the test element.

[0124] As an example, in step S9031, the load test device is debugged to check the initial loading coupling state of the load loading device in the three directions of X, Y and Z. The initial loading coupling state refers to the force applied in one direction and the influence in other directions. The force is applied in one direction and the influence in other directions is measured. An influence rate of 5% is a good state.

[0125] As an example, in step S9032, the loading mechanism 3 is controlled to work and the termination loading coupling state in three directions of the load loading device is obtained. The termination loading coupling state is the coupling state in three directions of the load loading device collected after adjusting the loading mechanism 3. Each time the loading mechanism 3 adjusts a state, it corresponds to a termination loading coupling state. In this way, the decoupling effect of the three-force sensor 10 in the three directions of X, Y and Z can reach the best state, that is, the mutual influence of the three directions is minimized.

[0126] As an example, in step S9033, according to the termination loading coupling state, PID parameter control adjustment is used to make the entire test system in the best decoupling effect state, and the transfer function model of the system is calculated, wherein PID is the abbreviation of Proportional, Integral, and Differential. The essence of PID control is to perform calculations according to the functional relationship of proportional, integral, and differential based on the input deviation value, and the calculation results are used to control the output; they represent three control algorithms respectively, and the combination of these three algorithms can effectively correct the deviation of the controlled object, so that it can reach a stable state.

[0127] As an example, in step S9034, the target signal is imported into the transfer function model, and the RPC remote parameter control technology is used to load the driving signal of the target signal (load size, frequency, phase, etc.) in an iterative manner, wherein the driving signal is the force (load) to be applied (i.e., the reproduced signal) obtained by inversely solving the transfer function according to the target signal.

[0128] As an example, in step S9035, according to the driving signal, the number of cycles set by the corresponding test standard is selected to control the load loading device to work, apply load to the test element, and perform a durability test on the bushing part 111. The bottom plate 1 serves as a base, and a sample installation tool 12 is provided on the bottom plate 1 for placing the bushing part 111. The data acquisition device is assembled on the bushing part 111, and the loading tool 2 is connected to the data acquisition device. The loading mechanism 3 applies a load to the data acquisition device and the bushing part 111 through the loading tool 2. The sample installation tool 12 can ensure that the data acquisition device and the bushing part 111 The fixation is stable and reliable, and there will be no sliding, which can avoid affecting the accuracy of the test. The loading fixture 2 cooperates with the X-direction loading component 31, the Y-direction loading component 32 and the Z-direction loading component 33, which is convenient for regulating the loading loads in the X-direction, Y-direction and Z-direction, so that the load forces in the three directions can be loaded simultaneously on the loading fixture 2. In conjunction with the data acquisition device, the stress conditions of the bushing part 111 can be collected, including parameters such as load size, frequency, and phase. The real load of the collected test element can be accurately reproduced, and the actual load spectrum of the test element can be obtained more accurately, thereby ensuring the accuracy of the durability performance verification.

[0129] The embodiment of the present invention provides a controller 13, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the test method of the load test device and the bushing test device in the above embodiment is implemented, for example Fig. 9 S901-S903 as shown, or Fig.10 As shown in S9021-S9022, Fig.11 As shown in S9031-S9035, to avoid repetition, they are not repeated here.

[0130] In one embodiment, a controller 13 is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the test method of the load test device and the bushing test device in the above embodiment is implemented, for example Fig. 9 S901-S903 as shown, or Fig.10 As shown in S9021-S9022, Fig.11 As shown in S9031-S9035, to avoid repetition, they are not repeated here.

[0131] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the test method of the load test device and the bushing test device in the above embodiment is implemented, for example Fig. 9 S901-S903 as shown, or Fig.10As shown in S9021-S9022, Fig.11 As shown in S9031-S9035, to avoid repetition, they are not repeated here.

[0132] The embodiment of the present invention provides a control system, referring to Figure 7 and Figure 8 , including a load test device, a bushing test equipment and a controller 13.

[0133] As an example, before conducting a durability test on the bushing part 111, a data acquisition device is first installed between the bushing part 111 and the main body part 112, and the connected bushing test equipment is installed on the test vehicle. The actual force data of the bushing part 111 can be collected, including parameters such as load size, frequency, and phase, and the real load spectrum of the bushing part 111 can be obtained, thereby obtaining the target signal.

[0134] As an example, according to the acquired target signal, a durability test is performed on the bushing part 111. The bottom plate 1 serves as a base, and a sample installation tool 12 is provided on the bottom plate 1 for placing the bushing part 111. The data acquisition device is assembled on the bushing part 111. The loading tool 2 is connected to the data acquisition device. The loading mechanism 3 applies a load to the data acquisition device and the bushing part 111 through the loading tool 2. The sample installation tool 12 can ensure that the data acquisition device and the bushing part 111 are fixed stably and firmly without sliding, thereby avoiding affecting the test precision. Accuracy, the loading fixture 2 cooperates with the X-direction loading component 31, the Y-direction loading component 32 and the Z-direction loading component 33, so as to facilitate the regulation of the loading loads in the X-direction, Y-direction and Z-direction, so that the load forces in the three directions can be loaded simultaneously on the loading fixture 2. In conjunction with the data acquisition device, the stress conditions of the bushing part 111, including parameters such as load size, frequency, and phase, can be collected, the real load of the collected test element can be accurately reproduced, the actual load spectrum of the test element can be obtained more accurately, and the accuracy of the durability performance verification can be guaranteed.

[0135] In this example, the data acquisition device is first installed between the bushing part 111 and the main body part 112, and the connected bushing test equipment is installed on the test vehicle, so as to collect the actual force data of the bushing part 111, including parameters such as load size, frequency, phase, etc., and obtain the real load spectrum of the bushing part 111, thereby obtaining the target signal; then the data acquisition device is installed on the bushing part 111, and the bushing part 111 is placed on the sample installation fixture 12 set on the bottom plate 1, and the loading fixture 2 is connected to the data acquisition device, and the loading mechanism 3 is fed through the loading fixture 2. The data acquisition device and the bushing part 111 apply load, and the loading fixture 2 cooperates with the X-direction loading component 31, the Y-direction loading component 32 and the Z-direction loading component 33, so as to facilitate the regulation of the loading loads in the X-direction, Y-direction and Z-direction, so that the load forces in the three directions can be loaded simultaneously on the loading fixture 2. In conjunction with the data acquisition device, the stress conditions of the bushing part 111 can be collected, including parameters such as load size, frequency, and phase, so that the real load of the collected test element can be accurately reproduced, and the actual load spectrum of the test element can be obtained more accurately, thereby ensuring the accuracy of the durability performance verification.

[0136] In this embodiment, the stress conditions of the bushing during actual vehicle operation can be accurately collected to obtain the corresponding real load spectrum; the collected real load signal can be accurately reproduced, and the real three-axis forces (Fx, Fy, Fz) on the bushing are loaded simultaneously, with real-time feedback and closed-loop control. Under component-level test conditions, the vehicle-level durability test verification can be completed, thereby improving the accuracy of the bushing durability performance verification, solving the problem of inconsistent faults between component tests and vehicle tests, and improving development efficiency. The effect of replacing vehicle verification with component verification can be achieved, saving development costs. At the same time, CAE can use the collected data to calibrate the model to improve the accuracy of the simulation, thereby further reducing development costs.

[0137] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A load loading device, characterized in that: It includes a base plate, a loading tool and a loading mechanism; The bottom plate is used to place the test element, and the loading fixture is connected to the test element; The loading mechanism includes an X-direction loading component, a Y-direction loading component and a Z-direction loading component; The X-direction loading assembly is connected to the first end of the loading fixture and is used to apply an X-direction load to the test element; The Y-direction loading assembly is connected to the second end of the loading fixture, and is used to apply a Y-direction load to the test element; The Z-direction loading assembly is connected to the third end of the loading fixture and is used to apply a Z-direction load to the test element.

2. The load loading device according to claim 1, characterized in that: The loading tooling comprises a first connecting member and a second connecting member; The first connecting member includes a connecting body and a first connecting portion and a second connecting portion extending from two sides of the connecting body in mutually perpendicular directions, the first connecting portion is connected to the X-direction loading assembly, and the second connecting portion is connected to the Y-direction loading assembly; The second connecting member is arranged on the connecting body along the Z direction, and is used to connect the Z-direction loading assembly.

3. The load loading device according to claim 2, characterized in that: The loading tool also includes a third connecting piece; The third connecting member is arranged on the connecting body along the Z direction, and the second connecting member is assembled on the third connecting member.

4. The load loading device according to claim 2, characterized in that: The second connecting member is provided with a receiving groove; the Z-direction loading assembly is installed in the receiving groove.

5. The load loading device according to claim 1, characterized in that: The X-direction loading assembly, the Y-direction loading assembly and the Z-direction loading assembly each include a load loading actuator and a load force transmission assembly; The load loading actuator is mounted on a support frame and connected to the loading fixture via a load force transmission component; the load force transmission component includes a cross-coupling force application unit and an elastic connection unit that are staggered and connected.

6. The load loading device according to claim 5, characterized in that: The cross-coupling force applying unit comprises a tetrahedron, and a fourth connecting member and a fifth connecting member respectively extending from two mutually perpendicular sides of the tetrahedron; The fourth connecting member is connected to the elastic connecting unit, and the fifth connecting member is connected to the loading tooling; Alternatively, the fourth connecting member is connected to the load loading actuator, and the fifth connecting member is connected to the elastic connecting unit.

7. The load loading device according to claim 5, characterized in that: The elastic connection unit is configured as a rectangular elastic connection member, one side of the rectangular elastic connection member is connected to the cross-coupling force application unit, and the other side of the rectangular elastic connection member is connected to the load loading actuator; Alternatively, one side of the rectangular elastic connector is connected to the loading fixture, and the other side of the rectangular elastic connector is connected to the cross-coupling force application unit.

8. The load loading device according to claim 5, characterized in that: At least one of the X-direction loading assembly, the Y-direction loading assembly and the Z-direction loading assembly further comprises a linear loading connection unit, wherein the linear loading connection unit is installed between the loading fixture and the cross-coupling force application unit; Alternatively, the linear loading connection unit is installed between the loading fixture and the elastic connection unit.

9. The load loading device according to claim 8, characterized in that: The linear loading connection unit includes a long strip main body, a sixth connection member connected to one side of the main body, and a seventh connection member connected to the other side of the main body, wherein the sixth connection member and the seventh connection member are perpendicular to each other; The sixth connecting member is connected to the cross-coupling force applying unit, and the seventh connecting member is connected to the loading tooling; Alternatively, the sixth connecting member is connected to the elastic connecting unit, and the seventh connecting member is connected to the loading tooling.

10. The load loading device according to claim 5, characterized in that: The X-direction loading assembly, the Y-direction loading assembly and the Z-direction loading assembly further include linear guide rails, the linear guide rails are mounted on the support frame, and the load loading actuator is mounted in the linear guide rails.

11. A load testing device, characterized in that: A load loading device and a data acquisition device comprising any one of claims 1 to 10; The data acquisition device is mounted on the test element; The loading fixture of the load loading device is assembled on the data acquisition device.

12. The load testing device according to claim 11, characterized in that: The data acquisition device is a three-force sensor, which includes a sensor body and a first connection plate and a second connection plate fixed at two ends of the sensor body; The first connection plate is connected to the test element, and the second connection plate is connected to the receiving member, and is used to collect the actual stress condition of the test element; or, the second connection plate is connected to the loading tooling, and is used to perform a load endurance test on the test element.

13. The load testing device according to claim 12, characterized in that: A plurality of energy absorbing holes are arranged on the circumference of the sensor body.

14. A test method, characterized in that: Applicable to load endurance test of control arm, the control arm includes bushing part and main body part, including: A data acquisition device is arranged between the bushing part and the main body part to collect a stress load spectrum of the bushing part; Acquiring a target signal according to the force load spectrum; According to the target signal, the load loading device described in any one of claims 1 to 10 is controlled to operate.

15. The test method according to claim 14, characterized in that: The step of acquiring a target signal according to the force load spectrum includes: According to the stress load spectrum of the bushing part, obtaining stress data in three directions; According to the force data in three directions, target signals in three directions are generated.

16. The test method according to claim 14, characterized in that: The method of controlling the load loading device according to any one of claims 1 to 10 to work according to the target signal comprises: Obtaining the initial loading coupling state of the load loading device in three directions; Controlling the loading mechanism to work and obtaining the termination loading coupling state of the load loading device in three directions; acquiring a transfer function model according to the termination loading coupling state; Importing the target signal into the transfer function model, and loading out a driving signal corresponding to the target signal; According to the driving signal, the load applying device is controlled to work and apply load to the test element.

17. A controller comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the test method according to any one of claims 14 to 16 is implemented.

18. A control system, characterized in that: It comprises the load testing device according to any one of claims 11 to 13 and the controller according to claim 17.

Images