Double-station multifunctional stabilizer bar testing machine and stabilizer bar reliability testing method thereof

Abstract

The invention relates to the technical field of automobile part test and detection, in particular to a double-station multifunctional stabilizer bar testing machine and a stabilizer bar reliability test method thereof, and the testing machine comprises a mounting platform, a mounting frame, a lifting device, two actuator devices, two transverse moving devices and a clamp device; the mounting frame comprises a first cross beam and a second cross beam; the lifting device is arranged on the first cross beam; the two transverse moving devices are arranged on the second cross beam; one ends of the two actuator devices are connected with the second cross beam, and the other ends of the actuator devices are connected with the clamp devices; the two ends of the stabilizer bar are connected with the clamp devices respectively, and the actuator device drives the two ends of the stabilizer bar to move through the clamp devices. The invention has the advantages that the second cross beam can realize automatic lifting, and the actuator device can realize automatic translation; the two actuator devices are adopted to simulate the actual working condition load of the stabilizer bar, and the two actuator devices can perform cooperative loading or independent loading; and the test requirements of one stabilizer bar or two stabilizer bars can be met.

Description

Technical Field

[0001] The invention relates to the technical field of automobile component testing and detection, and in particular to a double-station multifunctional stabilizer bar testing machine and a stabilizer bar reliability testing method thereof. Background Art

[0002] As an important part of the car, the stabilizer bar prevents the car body from excessive lateral roll when turning, reduces the body from excessive bumps when twisting, and plays a role in lateral stability. The car uses the stabilizer bar to adjust the stiffness of the roll angle to improve the driving stability of the car. The comprehensive performance of the stabilizer bar directly affects the handling stability and ride comfort of the vehicle frame. However, the existing stabilizer bar testing machine has limitations. It can only test a single stabilizer bar and can only test one performance of the stabilizer bar. It is impossible to simultaneously test multiple performances and endurance of the stabilizer bar. Summary of the invention

[0003] In view of this, the present invention aims to provide a dual-station multifunctional stabilizer bar testing machine and a stabilizer bar reliability testing method thereof, which can realize simultaneous testing of two stabilizer bars through two actuator devices, two lateral movement devices and a clamp device.

[0004] To achieve the above-mentioned purpose, the technical solution created by the present invention is implemented as follows: a double-station multifunctional stabilizer bar testing machine, comprising: a mounting platform, a mounting frame, a lifting device, two actuator devices, two transverse movement devices and a clamp device; the mounting frame and the clamp device are arranged on the mounting platform, and the mounting frame comprises two oppositely arranged column assemblies, and a first beam and a second beam arranged in sequence from top to bottom between the two column assemblies; the lifting device is arranged on the first beam, and the lifting device is used to adjust the height of the second beam; the two transverse movement devices are arranged on the second beam; one end of the two actuator devices is connected to the second beam, and the other end of the actuator device is connected to the clamp device; each transverse movement device is connected to an actuator device, and the transverse movement device is used to drive the actuator device to move transversely; the two ends of the stabilizer bar are respectively connected to the clamp devices, and the actuator device drives the two ends of the stabilizer bar to move through the clamp device.

[0005] Furthermore, the upper end surface of the first cross beam is flush with the upper end surfaces of the two column assemblies; and the second cross beam can move up and down along the two column assemblies.

[0006] Furthermore, the lifting device includes a motor, a commutator, a first transmission shaft, a second transmission shaft, a first reducer, a second reducer, a first ball screw and a second ball screw; the output end of the motor is connected to the input end of the commutator, one end of the first transmission shaft is connected to the first output end of the commutator, and the other end of the first transmission shaft is connected to the input end of the first reducer; one end of the first ball screw is connected to the output end of the first reducer, and the other end of the first ball screw is fixed to one of the column assemblies through a first bearing seat; the first nut of the first ball screw is connected to the second crossbeam; one end of the second transmission shaft is connected to the second output end of the commutator, and the other end of the second transmission shaft is connected to the input end of the second reducer; one end of the second ball screw is connected to the output end of the second reducer, and the other end of the second ball screw is fixed to another column assembly through a second bearing seat; the second nut of the second ball screw is connected to the second crossbeam.

[0007] Furthermore, each actuator device includes a hoisting assembly and an actuator assembly, the hoisting assembly is arranged on the second crossbeam, one end of the actuator assembly is connected to the hoisting assembly, and the other end of the actuator assembly is connected to the clamp device.

[0008] Furthermore, two transverse movement devices are respectively arranged on two opposite sides of the second beam; each transverse movement device includes a driving assembly, a pulley assembly and a third ball screw; the pulley assembly is respectively connected to the driving assembly and one end of the third ball screw; the other end of the third ball screw is fixed to the second beam through a second bearing seat; the third nut of the third ball screw is connected to the lifting assembly.

[0009] Furthermore, the fixture device includes two adjustment plate assemblies, two fixed frames, two movable assemblies and four sensor assemblies; the two adjustment plate assemblies and the two fixed frames are arranged on the mounting platform; each movable assembly is connected to a fixed frame; wherein two sensor assemblies are connected to one of the movable assemblies, and the other two sensor assemblies are connected to the other movable assembly.

[0010] Furthermore, each adjustment plate assembly includes an adjustment plate and two tooling fixing seats arranged on the adjustment plate.

[0011] Furthermore, each moving component includes a linear guide, a connecting seat and a connecting plate; the linear guide is arranged on a fixed frame, the connecting seat is connected to the slider of the linear guide, and the actuator device is connected to the connecting seat through a second hinge component; the connecting plate is arranged on the connecting seat, and two connecting holes are provided on the connecting plate; the connecting plate is a trapezoidal plate, and the trapezoidal bottom edge of the connecting plate is concave inward to form a notch.

[0012] A stabilizer bar reliability test method, implemented using the above-mentioned dual-station multifunctional stabilizer bar testing machine, the test method includes a fatigue test method, a stiffness test method and a strength test method; The fatigue test method includes the following steps: A1: First fix the stabilizer bar on the adjustment plate assembly of the fixture device, and then connect the two ends of the stabilizer bar to the sensor assembly of the fixture device respectively.

[0013] A2: Start the two actuator devices, and the two actuator devices drive the two ends of the stabilizing bar to move in two opposite directions according to a first preset frequency and a first preset number of cycles.

[0014] A3: If the stabilizer bar is damaged or broken within the first preset number of cycles, the test is terminated; if the stabilizer bar is not damaged or broken at the end of the first preset number of cycles, the number of cycles is increased until the stabilizer bar is damaged or broken.

[0015] The stiffness test method includes the following steps: B1: First fix the stabilizer bar on the adjustment plate assembly of the fixture device, and then connect the two ends of the stabilizer bar to the sensor assembly of the fixture device respectively.

[0016] B2: Start one of the actuator devices, and the output end of the actuator device drives one end of the stabilizing bar adjacent to the actuator device to move a first preset distance in a first direction at a second preset frequency; then, the output end of the actuator device drives this end of the stabilizing bar to move to the original position at the same frequency, and changes direction, and continues to move the first preset distance in the second direction at the same frequency; finally, the output end of the actuator device drives this end of the stabilizing bar to return to the initial position, thereby completing a complete cycle and finally forming a force and displacement curve.

[0017] B3: Select two points on the force and displacement curve in step B2, and calculate the stiffness value between the two points based on the displacement and force corresponding to each point.

[0018] The strength test method includes the following steps: C1: First fix the stabilizer bar on the adjustment plate assembly of the fixture device, and then connect the two ends of the stabilizer bar to the sensor assembly of the fixture device respectively.

[0019] C2: Start the two actuator devices, and the two actuator devices drive the two ends of the stabilizer bar to move in opposite directions according to the second preset number of cycles.

[0020] C3: Remove the stabilizer bar and measure the deformation at both ends of the stabilizer bar.

[0021] Furthermore, it also includes an axial force endurance test method, which is implemented based on the above-mentioned double-station multifunctional stabilizer bar testing machine and axial loading mold. The axial loading mold includes a fixed column, a force loading joint, a loading spring, a spring fixing seat, a screw, a nut, a force sensor and a sensor fixing seat; the fixed column is arranged on the mounting platform, the sensor fixing seat is arranged on the adjustment plate assembly of the clamp device, one end of the force sensor is connected to the sensor fixing seat, and the other end of the force sensor is connected to the spring fixing seat; the loading spring is sleeved on the screw, and one end of the loading spring is located in the spring fixing seat; one end of the screw is arranged in the spring fixing seat, and the other end of the screw is connected to the force loading joint through a universal joint, and the nut is threadedly connected to the screw for adjusting the length of the loading spring.

[0022] The axial force endurance test method includes the following steps: D1: First fix the stabilizer bar to the adjustment plate assembly of the fixture device, then connect one end of the stabilizer bar to the sensor assembly of the fixture device, fix the other end of the stabilizer bar to the fixed column, and finally connect the free end of the force loading joint to the stabilizer bar and place it close to the fixed column.

[0023] D2: Adjust the position of the nut to compress the loading spring until the load on the force sensor reaches the preset load.

[0024] D3: Start the actuator device located at one side of the stabilizer bar connected to the sensor assembly, and the actuator device drives the stabilizer bar to move according to the second preset distance at a third preset frequency and a third preset number of cycles.

[0025] D4: When the stabilizer bar is damaged or broken within the third preset number of cycles, the stabilizer bar is determined to be unqualified.

[0026] Compared with the prior art, the invention can achieve the following beneficial effects: 1) Two actuator devices are used to simulate the actual working load of the stabilizer bar. The two actuator devices can be loaded collaboratively or independently; that is, the test of a single stabilizer bar can be completed, and the test requirements of two stabilizer bars can be completed.

[0027] 2) The lifting function of the second beam can be realized through the lifting device; the horizontal movement of the two actuator devices can be realized through the two transverse movement devices.

[0028] 3) The fixture device can be used to meet the reliability test of stabilizer bars of different specifications.

[0029] 4) When conducting reliability tests, the iterative software can perform loading, load holding and unloading tests according to load or displacement control, and has a specimen fracture protection function. In addition, when setting the fatigue test, the initial amplitude and initial frequency phase difference can be set. When the experiment reaches the predetermined number of cycles, the iterative software will automatically stop the test and record the total number of cycles. Equipped with iterative software, it can meet the simulation test needs of the automobile road spectrum.

[0030] 5) The vertical dual-channel dual-station multifunctional stabilizer bar fatigue testing machine and reliability testing method involved in the present invention have comprehensive testing functions, accurate data collection, high testing efficiency, can greatly shorten the product development cycle, and can provide basic data for product performance and quality evaluation in the mass production stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings: Figure 1 is a structural schematic diagram of a double-station multifunctional stabilizer bar testing machine provided according to an embodiment of the present invention; Figure 2 is a schematic structural diagram of a mounting frame provided according to an embodiment of the present invention; Figure 3 is a schematic structural diagram of a lifting device provided according to an embodiment of the present invention; Figure 4 is a structural schematic diagram of an actuator device provided in an embodiment of the present invention; Figure 5 is a schematic structural diagram of a transverse movement device provided according to an embodiment of the present invention; Figure 6 is a schematic structural diagram of a clamp device provided according to an embodiment of the present invention; Figure 7 It is a structural schematic diagram of a double-station multifunctional stabilizer bar testing machine and an axial loading mold provided according to an embodiment of the present invention; Figure 8 is a schematic structural diagram of an axial loading mold provided according to an embodiment of the present invention.

[0032] The reference numerals include: 1, mounting frame; 11, first crossbeam; 12, second crossbeam; 121, long groove; 13, column assembly; 131, bottom plate; 132, column; 133, height adjustment plate; 134, first connecting beam; 135, second connecting beam; 136, third connecting beam; 137, escalator assembly; 2, mounting platform; 3, lifting device; 31, motor; 32, commutator; 33, first transmission shaft; 34, second transmission shaft; 35, first reducer; 36, second reducer; 37, first ball screw; 38, second ball screw; 39, first bearing seat; 310, second bearing seat; 311, third bearing seat; 312, fourth bearing seat; 4, actuator device; 41, lifting assembly; 411, upper plate; 412, lower plate; 413 , support member; 42, actuator assembly; 43, first hinge assembly; 44, second hinge assembly; 5, transverse movement device; 51, drive assembly; 52, pulley assembly; 53, third ball screw; 54, fifth bearing seat; 6, clamp device; 61, adjustment plate assembly; 611, adjustment plate; 612, tooling fixed seat; 62, fixed frame; 621, fixed bottom plate; 622, fixed vertical plate; 623, fixed rib plate; 63, moving assembly; 631, linear guide; 632, connecting seat; 633, connecting plate; 64, sensor assembly; 7, stabilizer bar; 8, axial loading mold; 81, fixed column; 82, force loading joint; 83, loading spring; 84, spring fixing seat; 85, screw; 86, nut; 87, force sensor; 88, sensor fixing seat. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the invention more clear, the invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the invention and do not constitute a limitation of the invention.

[0034] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "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 accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0036] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0037] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0038] like Figures 1 to 8 As shown, a dual-station multifunctional stabilizer bar testing machine provided by an embodiment of the present invention comprises: a mounting platform 2, a mounting frame 1, a lifting device 3, two actuator devices 4, two lateral movement devices 5, and a clamp device 6. The mounting frame 1 and the clamp device 6 are arranged on the mounting platform 2.

[0039] On the upper surface of the mounting platform 2, a plurality of T-slots are evenly arranged along the length direction and the width direction of the mounting platform 2. The positions of the mounting frame 1 and the clamp device 6 can be adjusted by the T-slots.

[0040] The mounting frame 1 includes two oppositely disposed column assemblies 13, and a first crossbeam 11 and a second crossbeam 12 disposed sequentially from top to bottom between the two column assemblies 13. The two ends of the first crossbeam 11 are respectively connected to the two column assemblies 13, and the upper surface of the first crossbeam 11 is flush with the upper surfaces of the two column assemblies 13. The two ends of the second crossbeam 12 are respectively connected to the two column assemblies 13, and the second crossbeam 12 can move up and down along the two column assemblies 13. A long groove 121 for guiding is also provided on the upper surface of the second crossbeam 12 along the length direction of the second crossbeam 12.

[0041] Each column assembly 13 includes a bottom plate 131, two columns 132, two height adjustment plates 133, and a first connecting beam 134, a second connecting beam 135, and a third connecting beam 136 arranged in sequence from top to bottom between the two columns 132. The two columns 132 are arranged on the bottom plate 131 at intervals and fixed to the bottom plate 131 through a rib plate. The upper surface of the first connecting beam 134 is flush with the upper surfaces of the two columns 132. The two height adjustment plates 133 are fixed to the two columns 132, respectively, and each height adjustment plate 133 is provided with an adjustment hole, and the second cross beam 12 is connected to the height adjustment plate 133 through the adjustment hole.

[0042] A ladder assembly 137 is also provided on the outer side of each column assembly 13 (on the side opposite to the side on which the height adjustment plate 133 is installed on the column 132) to facilitate maintenance of the double-station multifunctional stabilizer bar testing machine.

[0043] The lifting device 3 is arranged on the first beam 11, and the lifting device 3 is used to adjust the height of the second beam 12. The lifting device 3 includes a motor 31, a commutator 32, a first transmission shaft 33, a second transmission shaft 34, a first reducer 35, a second reducer 36, a first ball screw 37 and a second ball screw 38. The output end of the motor 31 is connected to the input end of the commutator 32, one end of the first transmission shaft 33 is connected to the first output end of the commutator 32, and the other end of the first transmission shaft 33 is connected to the input end of the first reducer 35 through the first bearing seat 39, and the first bearing seat 39 is fixed on the first beam 11. One end of the first ball screw 37 is connected to the output end of the first reducer 35, and the other end of the first ball screw 37 is fixed to the second connecting beam 135 of the column assembly 13 on the same side through the third bearing seat 311. The first nut of the first ball screw 37 is connected to one end of the second beam 12. One end of the second transmission shaft 34 is connected to the second output end of the commutator 32, and the other end of the second transmission shaft 34 passes through the second bearing seat 310 and is connected to the input end of the second reducer 36, and the second bearing seat 310 is fixed on the first crossbeam 11. One end of the second ball screw 38 is connected to the output end of the second reducer 36, and the other end of the second ball screw 38 is fixed to the second connecting beam 135 of the column assembly 13 on the same side through the fourth bearing seat 312. The second nut of the second ball screw 38 is connected to the other end of the second crossbeam 12.

[0044] When the height of the second crossbeam 12 needs to be adjusted, first release the connection with the height adjustment plate 133, then start the motor 31, and drive the first transmission shaft 33 and the second transmission shaft 34 to rotate synchronously through the commutator 32. Subsequently, the first transmission shaft 33 drives the first nut of the first ball screw 37 to move up and down along the screw of the first ball screw 37 through the first reducer 35, and at the same time, the second transmission shaft 34 drives the second nut of the second ball screw 38 to move up and down along the screw of the second ball screw 38 through the second reducer 36. Finally, the height adjustment of the second crossbeam 12 is achieved.

[0045] One end of the two actuator devices 4 is connected to the second beam 12, and the other end of the two actuator devices 4 is connected to the clamp device 6. Each actuator device 4 includes a hanging assembly 41 and an actuator assembly 42. The hanging assembly 41 is arranged on the second beam 12, the fixed end of the actuator assembly 42 is connected to the hanging assembly 41 through the first hinge assembly 43, and the output end of the actuator assembly 42 is connected to the clamp device 6 through the second hinge assembly 44. The hanging assembly 41 is sleeved on the outside of the second beam 12, and the hanging assembly 41 includes an upper plate 411, a lower plate 412 and two supporting members 413. The two supporting members 413 are located between the upper plate 411 and the lower plate 412, and form an accommodating cavity. The second beam 12 passes through the accommodating cavity, so that the hanging assembly 41 can be hung on the second beam 12.

[0046] The two transverse moving devices 5 are arranged on the second cross beam 12 and are respectively arranged on two opposite side surfaces of the second cross beam 12 , that is, one is located on one side of the second cross beam 12 and the other is located on the other side opposite to the second cross beam 12 .

[0047] Each transverse moving device 5 is connected to an actuator device 4, and the transverse moving device 5 is used to drive the actuator device 4 to move on the second beam 12 to achieve the distance adjustment between the two actuator devices 4. Each transverse moving device 5 includes a driving assembly 51, a pulley assembly 52 and a third ball screw 53. The input end of the pulley assembly 52 is connected to the output end of the driving assembly 51, and the output end of the pulley assembly 52 is connected to one end of the third ball screw 53. The other end of the third ball screw 53 is connected to the fifth bearing seat 54 through a bearing, and the fifth bearing seat 54 is fixed on the second beam 12. The third nut of the third ball screw 53 is connected to the hoisting assembly 41. The pulley assembly 52 includes a driving wheel, a driven wheel and a synchronous belt, wherein the driving wheel is connected to the output end of the driving assembly 51, the driven wheel is connected to one end of the third ball screw 53, and the synchronous belt is respectively meshed with the driving wheel and the driven wheel to achieve power transmission. In this embodiment, the third ball screws 53 of the two transverse movement devices 5 face in two opposite directions respectively.

[0048] The clamp device 6 is disposed on the mounting platform 2 , and both ends of the stabilizing rod 7 are respectively connected to the clamp device 6 . The actuator device 4 drives both ends of the stabilizing rod 7 to move through the clamp device 6 .

[0049] The fixture device 6 includes two adjustment plate assemblies 61, two fixed frames 62, two mobile assemblies 63 and four sensor assemblies 64. The two adjustment plate assemblies 61 and the two fixed frames 62 are arranged on the mounting platform 2. The two mobile assemblies 63 are connected to the two fixed frames 62 respectively. Two sensor assemblies 64 are connected to one of the mobile assemblies 63, and the other two sensor assemblies 64 are connected to the other mobile assembly 63. Each adjustment plate assembly 61 includes an adjustment plate 611 and two tooling fixing seats 612 arranged on the adjustment plate 611. The two tooling fixing seats 612 are used to fix the stabilizing bar 7. In this embodiment, the sensor assembly 64 is a load sensor.

[0050] The fixing frame 62 includes a fixing bottom plate 621 , a fixing vertical plate 622 and a fixing rib plate 623 which are arranged on the fixing bottom plate 621 .

[0051] Each moving assembly 63 includes a linear guide rail 631, a connecting seat 632 and a connecting plate 633. The linear guide rail 631 is arranged on the fixed vertical plate 622, the connecting seat 632 is connected to the slider of the linear guide rail 631, and the connecting seat 632 includes a fixed plate, a connecting top plate arranged perpendicular to the fixed plate, and a connecting rib plate located at a right angle between the fixed plate and the connecting top plate.

[0052] The actuator device 4 is connected to the connecting top plate of the connecting seat 632 through the second hinge assembly 44. The connecting plate 633 is arranged on the connecting seat 632, and two connecting holes are arranged on the connecting plate 633. The two sensor assemblies 64 are connected to the connecting plate 633 through one of the two connecting holes, that is, each sensor assembly 64 uses one connecting hole. The connecting plate 633 is a trapezoidal plate, and the trapezoidal bottom edge of the connecting plate 633 is concave inward to form a notch.

[0053] A stabilizer bar reliability test method, which is implemented by using the above-mentioned dual-station multifunctional stabilizer bar test machine and cooperating with MIMIC iterative software, and the test method includes fatigue test, stiffness test and strength test; Fatigue testing includes the following steps: A1: First, fix the stabilizing rod 7 on the adjusting plate assembly 61 of the clamp device 6, and then connect the two ends of the stabilizing rod 7 to the sensor assembly 64 of the clamp device 6 respectively.

[0054] A2: Start the two actuator devices 4. The two actuator devices 4 cycle 100,000 times (the first preset number of cycles) at 1.5 Hz (the first preset frequency) to drive the two ends of the stabilizing bar 7 to move in opposite directions.

[0055] A3: If the stabilizer bar 7 is damaged or broken within 100,000 cycles, the test is terminated; if the stabilizer bar 7 is not damaged or broken at the end of 100,000 cycles, the number of cycles is increased until the stabilizer bar 7 is damaged or broken; In this embodiment, the model of the actuator assembly 42 in the two actuator devices 4 is: ML.025.300. The maximum static test force of the actuator assembly 42 is: ±25kN; the maximum dynamic test force is: ±20kN; the displacement stroke is: ±150 mm. Since the materials and specifications of the stabilizer bars 7 of different samples are different, the displacements of the stabilizer bars 7 driven by the actuator device 4 during the test are inconsistent. The present invention does not limit the displacement of the stabilizer bars 7 driven by the actuator device 4.

[0056] The stiffness test includes the following steps: B1: First, fix the stabilizing rod 7 on the adjusting plate assembly 61 of the clamp device 6, and then connect the two ends of the stabilizing rod 7 to the sensor assembly 64 of the clamp device 6 respectively.

[0057] B2: Start one of the actuator devices 4, and the output end of the actuator assembly 42 drives one end of the stabilizing rod 7 adjacent to the actuator assembly 42 to move 50 mm (i.e., the first preset distance) in the first direction at a frequency of 0.1 Hz (i.e., the second preset frequency). Then, the output end of the actuator assembly 42 drives this end of the stabilizing rod 7 to move to the original position at the same frequency, and continues to move 50 mm (i.e., the first preset distance) in the second direction at the same frequency. Finally, the output end of the actuator assembly 42 drives this end of the stabilizing rod 7 to return to the initial position, thereby completing a complete cycle and finally forming a force and displacement curve.

[0058] In this embodiment, the direction in which the output end of the actuator assembly 42 extends is defined as a first direction, and the direction in which the output end of the actuator assembly 42 retracts is defined as a second direction.

[0059] B3: According to the force and displacement curve of step B2, calculate the vertical stiffness of the stabilizer bar 7. The vertical stiffness calculation formula of the stabilizer bar 7 is as follows:

[0060] R-vertical stiffness of the stabilizer bar 7, in Newton per millimeter (N / mm); - During loading, the force on one end of the stabilizer bar 7 when the roll angle α is 4°, in Newton (N); - During loading, the force on one end of the stabilizer bar 7 when the roll angle α is 2°, in Newton (N); - During loading, the deformation (displacement) of one end of the stabilizer bar 7 relative to the other end when the roll angle α is 4°, in millimeters (mm); - During loading, the deformation (displacement) of one end of the stabilizer bar 7 relative to the other end when the roll angle α is 2°, in millimeters (mm).

[0061] The strength test includes the following steps: C1: First, fix the stabilizing rod 7 on the adjusting plate assembly 61 of the clamp device 6, and then connect the two ends of the stabilizing rod 7 to the sensor assembly 64 of the clamp device 6 respectively.

[0062] C2: The two actuator devices 4 are started, and the two actuator devices 4 cycle 10 times (ie, the second preset number of cycles) to drive the two ends of the stabilizing rod 7 to move in two opposite directions.

[0063] In this example, the material of the stabilizer bar 7 is 55Cr3, so it is preferred to set two actuator devices 4 to drive the two ends of the stabilizer bar 7 to move 59.4 mm respectively, and there is no restriction on the movement frequency of the two actuator devices 4. In other embodiments, since the materials and specifications of the stabilizer bar 7 are different, the movement distances of the two ends of the stabilizer bar 7 driven by the two actuator devices 4 are adaptively adjusted according to the materials and specifications of the stabilizer bar 7, and there is no restriction on the frequency during the movement.

[0064] C3: Remove the stabilizer bar 7 and measure the deformation at both ends of the stabilizer bar 7. In this embodiment, the deformation of the stabilizer bar 7 is acceptable if it is less than 1 mm.

[0065] like Figure 7 , Figure 8 As shown, the axial force endurance test method is implemented based on the above-mentioned double-station multifunctional stabilizer bar testing machine and the axial loading mold 8, and the axial loading mold 8 includes a fixed column 81, a force loading joint 82, a loading spring 83, a spring fixing seat 84, a screw 85, a nut 86, a force sensor 87 and a sensor fixing seat 88. The fixed column 81 is arranged on the mounting platform 2, the sensor fixing seat 88 is arranged on the adjustment plate assembly 61 of the clamp device 6, one end of the force sensor 87 is connected to the sensor fixing seat 88, and the other end of the force sensor 87 is connected to the spring fixing seat 84. The loading spring 83 is sleeved on the screw 85, and one end of the loading spring 83 is located in the spring fixing seat 84. One end of the screw 85 is arranged in the spring fixing seat 84, and the other end of the screw 85 is connected to the force loading joint 82 through a universal joint. The nut 86 is screwed to the screw 85 to adjust the length of the loading spring 83. In this embodiment, when installing the axial loading mold 8, it is first necessary to remove the fixing frame 62, the moving assembly 63 and the two sensor assemblies 64 on one side of the axial loading mold 8.

[0066] The axial force endurance test method includes the following steps: D1: First, fix the stabilizer bar 7 to the adjustment plate assembly 61 of the fixture device 6, then connect one end of the stabilizer bar 7 to the sensor assembly 64 of the fixture device 6, and fix the other end of the stabilizer bar 7 to the fixed column 81 through a joint bearing. Finally, the free end of the force loading joint 82 is connected to the stabilizer bar 7 and is close to the fixed column 81. The fixed column 81 is provided with a waist-shaped hole, and the position of the stabilizer bar 7 on the fixed column 81 can be adjusted.

[0067] D2: Adjust the position of the nut 86 to compress the loading spring 83 until the load of the force sensor 87 is 750N (preset load). In this embodiment, the loading spring 83 is a rectangular spring.

[0068] D3: Start the actuator device 4 located on the side of the stabilizer bar 7 connected to the sensor assembly 64. The actuator device 4 cycles 10,000 times (the third preset number of cycles) at a frequency of 1 Hz (the third preset frequency). Each cycle drives the stabilizer bar 7 to move 52.7 mm (the second preset distance).

[0069] D4: When the stabilizer bar 7 is damaged or broken within 10,000 cycles (the third preset number of cycles), the stabilizer bar 7 is unqualified; otherwise, the stabilizer bar 7 is qualified.

[0070] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A dual-station multifunctional stabilizer bar testing machine, characterized in that: include: A mounting platform, a mounting frame, a lifting device, two actuator devices, two traverse devices and a clamping device; The mounting frame and the clamp device are arranged on the mounting platform, the mounting frame includes two column assemblies arranged opposite to each other, and a first beam and a second beam arranged in sequence from top to bottom between the two column assemblies; the lifting device is arranged on the first beam, and the lifting device is used to adjust the height of the second beam; The two transverse movement devices are arranged on the second crossbeam; The fixed ends of the two actuator devices are connected to the second crossbeam, and the output ends of the actuator devices are connected to the clamp device; Each of the transverse movement devices is connected to one of the actuator devices, and the transverse movement device is used to drive the actuator device to move transversely; The two ends of the stabilizing rod are respectively connected to the clamping device, and the actuator device drives the two ends of the stabilizing rod to move through the clamping device.

2. The double-station multifunctional stabilizer bar testing machine according to claim 1, characterized in that: The upper end surface of the first cross beam is flush with the upper end surfaces of the two column assemblies; and the second cross beam can move up and down along the two column assemblies.

3. The double-station multifunctional stabilizer bar testing machine according to claim 1, characterized in that: The lifting device includes a motor, a commutator, a first transmission shaft, a second transmission shaft, a first reducer, a second reducer, a first ball screw and a second ball screw; The output end of the motor is connected to the input end of the commutator, one end of the first transmission shaft is connected to the first output end of the commutator, and the other end of the first transmission shaft is connected to the input end of the first reducer; one end of the first ball screw is connected to the output end of the first reducer, and the other end of the first ball screw is fixed to one of the column assemblies through a first bearing seat; the first nut of the first ball screw is connected to the second crossbeam; One end of the second transmission shaft is connected to the second output end of the commutator, and the other end of the second transmission shaft is connected to the input end of the second reducer; one end of the second ball screw is connected to the output end of the second reducer, and the other end of the second ball screw is fixed to the other column assembly through a second bearing seat; the second nut of the second ball screw is connected to the second beam.

4. The double-station multifunctional stabilizer bar testing machine according to claim 1, characterized in that: Each of the actuator devices comprises a hoisting assembly and an actuator assembly, wherein the hoisting assembly is arranged on the second cross beam, the fixed end of the actuator assembly is connected to the hoisting assembly, and the output end of the actuator assembly is connected to the clamp device.

5. The double-station multifunctional stabilizer bar testing machine according to claim 4, characterized in that: The two transverse movement devices are respectively arranged on the two opposite sides of the second crossbeam; each of the transverse movement devices includes a driving assembly, a pulley assembly and a third ball screw; the pulley assembly is respectively connected to the driving assembly and one end of the third ball screw; the other end of the third ball screw is fixed to the second crossbeam through a second bearing seat; the third nut of the third ball screw is connected to the lifting assembly.

6. The double-station multifunctional stabilizer bar testing machine according to claim 1, characterized in that: The clamp device includes two adjustment plate assemblies, two fixed frames, two movable assemblies and four sensor assemblies; the two adjustment plate assemblies and the two fixed frames are arranged on the mounting platform; each movable assembly is connected to one of the fixed frames; wherein two of the sensor assemblies are connected to one of the movable assemblies, and the other two of the sensor assemblies are connected to another of the movable assemblies.

7. The double-station multifunctional stabilizer bar testing machine according to claim 6, characterized in that: Each of the adjustment plate assemblies comprises an adjustment plate and two tooling fixing seats arranged on the adjustment plate.

8. The double-station multifunctional stabilizer bar testing machine according to claim 6, characterized in that: Each of the moving components includes a linear guide, a connecting seat and a connecting plate; the linear guide is arranged on the fixed frame, the connecting seat is connected to the slider of the linear guide, and the actuator device is connected to the connecting seat through a second hinge component; the connecting plate is arranged on the connecting seat, and two connecting holes are provided on the connecting plate; the connecting plate is a trapezoidal plate, and the trapezoidal bottom edge of the connecting plate is concave inward to form a notch.

9. A stabilizer bar reliability test method, implemented by using the dual-station multifunctional stabilizer bar tester according to any one of claims 1 to 8 in conjunction with MIMIC iterative software, characterized in that: The test methods include fatigue test method, stiffness test method and strength test method; The fatigue test method includes the following steps: A1: First, fix the stabilizing bar on the adjusting plate assembly of the clamp device, and then connect the two ends of the stabilizing bar to the sensor assembly of the clamp device respectively; A2: starting the two actuator devices, and the two actuator devices drive the two ends of the stabilizing bar to move in two opposite directions according to a first preset frequency and a first preset number of cycles; A3: If the stabilizer bar is damaged or broken within the first preset number of cycles, the test is terminated; if the stabilizer bar is not damaged or broken at the end of the first preset number of cycles, the number of cycles is increased until the stabilizer bar is damaged or broken; The stiffness test method includes the following steps: B1: first fix the stabilizing bar on the adjusting plate assembly of the clamp device, and then connect the two ends of the stabilizing bar to the sensor assembly of the clamp device respectively; B2: one of the actuator devices is started, and the output end of the actuator device drives one end of the stabilizing rod adjacent to the actuator device to move a first preset distance in a first direction at a second preset frequency; then, the output end of the actuator device drives the end of the stabilizing rod to move to the original position at the same frequency, and changes the direction, and continues to move the first preset distance in the second direction at the same frequency; finally, the output end of the actuator device drives the end of the stabilizing rod to return to the initial position, thereby completing a complete cycle, and finally forming a force and displacement curve; B3: Select two points on the force and displacement curve in step B2, and calculate the stiffness value between the two points based on the displacement and force corresponding to each point; The strength test method includes the following steps: C1: first fix the stabilizing bar on the adjusting plate assembly of the clamp device, and then connect the two ends of the stabilizing bar to the sensor assembly of the clamp device respectively; C2: starting the two actuator devices, and the two actuator devices drive the two ends of the stabilizing bar to move in two opposite directions according to a second preset number of cycles; C3: Remove the stabilizer bar and measure the deformation at both ends of the stabilizer bar.

10. The stabilizer bar reliability test method according to claim 9, characterized in that: It also includes an axial force durability test method, which is implemented based on the double-station multifunctional stabilizer bar testing machine and axial loading mold described in any one of claims 1 to 8, and the axial loading mold includes a fixed column, a force loading joint, a loading spring, a spring fixing seat, a screw, a nut, a force sensor and a sensor fixing seat; The fixing column is arranged on the mounting platform, the sensor fixing seat is arranged on the adjusting plate assembly of the clamp device, one end of the force sensor is connected to the sensor fixing seat, and the other end of the force sensor is connected to the spring fixing seat; the loading spring is sleeved on the screw rod, and one end of the loading spring is located in the spring fixing seat; one end of the screw rod is arranged in the spring fixing seat, and the other end of the screw rod is connected to the force loading joint through a universal joint, and the nut is threadedly connected to the screw rod for adjusting the length of the loading spring; The axial force endurance test method includes the following steps: D1: First, fix the stabilizing rod to the adjusting plate assembly of the clamp device, then connect one end of the stabilizing rod to the sensor assembly of the clamp device, and fix the other end of the stabilizing rod to the fixing column, and finally connect the free end of the force loading joint to the stabilizing rod and place it close to the fixing column; D2: adjusting the position of the nut to compress the loading spring until the load of the force sensor reaches a preset load; D3: starting the actuator device located at the side of the stabilizing rod connected to the sensor assembly, wherein the actuator device drives the stabilizing rod to move according to the second preset distance at the third preset frequency and the third preset number of cycles; D4: When the stabilizer bar is damaged or broken within the third preset number of cycles, the stabilizer bar is determined to be unqualified.

Images