Automated testing device for steering system

Abstract

The utility model discloses an automatic testing device for a steering system. The automatic testing device comprises a base; the restraining assembly is arranged on the base, and the restraining assembly is used for fixing a tested steering system; the lateral loading mechanism comprises a first stand column and a first hydraulic part, and the first hydraulic part extends in the horizontal plane in the first direction; the longitudinal loading mechanism comprises a second stand column and a second hydraulic part, and the second hydraulic part extends in the second direction perpendicular to the first direction on the horizontal plane. According to the automatic testing device for the steering system, the problem of testing verification of electromechanical composite working conditions of an electromechanical integrated system in part, system and whole vehicle level tests is solved, synchronism of mechanical loads and electric signal loads is considered, a loading scheme of a steering system test is improved into three-direction (lateral, vertical and longitudinal) multi-axis loading, and the testing efficiency is improved. The method is more consistent with actual user use, and the simulation precision is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle testing, in particular to an automatic testing device for a steering system. Background Art

[0002] With the development of the automotive industry, electronic control technology is increasingly being used in vehicles, and automotive products are evolving towards electrical intelligence. In component-level, system-level, and especially vehicle-level road simulation bench tests, the verification of systems / components such as electric steering, wire-controlled active suspension, and wire-controlled brake systems also needs to evolve from pure mechanical structure verification to test verification of mechatronic systems.

[0003] In the field of test and verification of mechatronic systems, the technical problems that need to be solved mainly include the loading of composite working conditions of mechanical load and electrical signal load, as well as the timing synchronization between the two and test status monitoring.

[0004] The test device in the prior art has the following disadvantages:

[0005] 1. The electrical function verification of the steering system is not involved;

[0006] 2. The problem of synchronous reproduction and simulation of mechanical load and electrical signal load is not considered;

[0007] 3. The mechanical load of the steering rod ball head only considers lateral loading, without vertical and longitudinal loading;

[0008] 4. The test accuracy is low and the test functions are not comprehensive. Utility Model Content

[0009] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes an automatic test device for a steering system, which can perform three-way loading and steering torque loading of the steering system to meet the needs of actual working conditions.

[0010] According to the utility model, the steering system automation test device includes: a base; a constraint component, the constraint component is arranged on the base, and the constraint component is used to fix the steering system under test; a lateral loading mechanism, the lateral loading mechanism includes a first column and a first hydraulic component, the lower end of the first column is fixedly arranged on the base, the first hydraulic component extends in a first direction in a horizontal plane, and the upper end of the first column is connected to one end of the first hydraulic component; a longitudinal loading mechanism, the longitudinal loading mechanism includes a second column and a second hydraulic component, the lower end of the second column is fixedly arranged on the base, the second hydraulic component extends in a second direction perpendicular to the first direction in a horizontal plane, the upper end of the second column is connected to one end of the second hydraulic component, and the other end of the second hydraulic component is connected to the other end of the first hydraulic component; a connecting member, the connecting member is arranged on the constraint component, one end of the connecting member is connected to the steering system under test, and the other end of the connecting member is connected to the other end of the first hydraulic component and the other end of the second hydraulic component; a control system component, the control system component is electrically connected to the first hydraulic component and the second hydraulic component respectively.

[0011] According to the steering system automated test device of the utility model, by setting loading mechanisms in multiple directions, the loading scheme of the steering system test is improved to multi-directional (lateral, vertical, longitudinal) multi-axis loading, which is more consistent with actual user use. At the same time, the utility model takes into account the test verification of the electromechanical composite working conditions of the mechatronic system, as well as the synchronization of mechanical load and electrical signal load, and has higher simulation accuracy.

[0012] In some embodiments, the steering system automated test device also includes: a vertical loading mechanism, the vertical loading mechanism includes a third hydraulic component, the third hydraulic component extends in the up and down directions, the upper end of the third hydraulic component is connected to the other end of the first hydraulic component and the other end of the second hydraulic component and is connected to the connecting component, the lower end of the third hydraulic component is arranged on the base, and the third hydraulic component is electrically connected to the control system component.

[0013] In some embodiments, the connecting member has a first connecting portion, a second connecting portion and a third connecting portion, the other end of the first hydraulic member is pivotally connected to the first connecting portion, the other end of the second hydraulic member is pivotally connected to the second connecting portion, and the third hydraulic member is pivotally connected to the third connecting portion.

[0014] In some embodiments, the lateral loading mechanism, the longitudinal loading mechanism, the vertical loading mechanism and the connecting member each include two, and the two lateral loading mechanisms, the two longitudinal loading mechanisms, the two vertical loading mechanisms and the two connecting members are all arranged symmetrically about the center plane of the base in the second direction.

[0015] In some embodiments, the connecting member further has a fourth connecting portion, and two ends of the steering gear of the steering system under test are respectively connected to one of the fourth connecting portions.

[0016] In some embodiments, the steering system automated test device further includes: a sensor assembly, the sensor assembly including a first sensor, a second sensor and a third sensor, the first sensor being arranged on the steering system under test along a first direction, and the second sensor and the third sensor being both arranged on the connecting member.

[0017] In some embodiments, the steering system automated test device also includes: a steering torque loading mechanism, which is arranged on the constraint assembly, and the steering torque loading mechanism includes: a fixed bracket, which extends along the first direction, and both ends of the fixed bracket are formed with through holes that penetrate the fixed bracket in the thickness direction; a driving member, which is arranged on the fixed bracket; a locking member, which includes two locking members, and the two locking members are arranged one-to-one corresponding to the through holes, each of the locking members is movably arranged in the through hole along the first direction, and each of the locking members is formed with a through hole, and the inner peripheral wall of the through hole is formed with an internal thread; a screw rod, the screw rod penetrates the fixed bracket and passes through the locking member in the length direction of the fixed bracket, the screw rod can rotate relative to the locking member, the outer peripheral wall of the screw rod is formed with an external thread, and the locking member is threadedly connected to the screw rod.

[0018] In some embodiments, the directions of the internal threads of the two locking members are opposite.

[0019] In some embodiments, the constraint assembly includes: a support seat, which is fixed on the base; a third column, which is arranged on the support seat, and the driving member is fixed on the third column; a fourth column, which is arranged on the support seat, and a mounting bracket is provided on the fourth column, and the steering column of the steering system under test is arranged on the mounting bracket; a fixed block, which is arranged on the support seat, and the steering gear of the steering system under test is arranged on the fixed block.

[0020] In some embodiments, the control system components include: a hydraulic control module, a motor control module and a power control module, the hydraulic control module is electrically connected to the first hydraulic component, the second hydraulic component and the third hydraulic component, the motor control module is electrically connected to the driving component, and the power control module is electrically connected to the power supply.

[0021] In some embodiments, the steering system automated test device further includes: a monitoring module, wherein the monitoring module is electrically connected to the steering system under test and is used to monitor the steering system under test.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of a steering system automation test device according to an embodiment of the utility model;

[0024] Figure 2 yes Figure 1 A schematic diagram of the constraint assembly shown in ;

[0025] Figure 3 yes Figure 1 Schematic diagram of the lateral / longitudinal / vertical loading mechanism shown in;

[0026] Figure 4 yes Figure 1 A schematic diagram of the connection relationship between the connector shown in and the steering system under test;

[0027] Figure 5 yes Figure 4 A schematic diagram of the connector shown in ;

[0028] Figure 6 yes Figure 1 Schematic diagram of the connection between the steering torque loading mechanism and the steering wheel shown in ;

[0029] Figure 7 yes Figure 6 Schematic diagram of the steering torque loading mechanism shown in ;

[0030] Figure 8 is a control logic diagram of a steering system automation test device according to an embodiment of the utility model;

[0031] Fig. 9 yes Figure 8 The schematic diagram of electromechanical composite loading logic shown in;

[0032] Fig.10 yes Figure 8 The logic diagram of automated monitoring of test status is shown in .

[0033] Reference numerals:

[0034] 100. Steering system automated test device;

[0035] 1. base; 11. first slot;

[0036] 2. Constraint assembly; 21. Support seat; 211. Second slot; 22. Third column; 23. Fourth column; 24. Fixing block; 25. Mounting bracket;

[0037] 3. Side loading mechanism; 31. First column; 32. First hydraulic component;

[0038] 4. longitudinal loading mechanism; 41. second column; 42. second hydraulic component;

[0039] 51. Steering gear; 52. Steering column;

[0040] 6. Control system components;

[0041] 7. Vertical loading mechanism; 71. Third hydraulic component;

[0042] 8. Connecting member; 81. First connecting portion; 82. Second connecting portion; 83. Third connecting portion; 84. Fourth connecting portion;

[0043] 9. Steering torque loading mechanism; 91. Fixed bracket; 92. Driving member; 93. Locking member; 94. Screw rod; 95. Adjusting handle;

[0044] 10. power supply; 101. wiring harness; 102. bus;

[0045] 200. Steering wheel. DETAILED DESCRIPTION

[0046] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0047] Reference below Figure 1-Figure 7 A steering system automated testing device 100 according to an embodiment of the present invention is described.

[0048] like Figure 1 As shown, the steering system automated testing device 100 according to the embodiment of the present utility model comprises: a base 1 , a constraint assembly 2 , a lateral loading mechanism 3 , a longitudinal loading mechanism 4 , a connecting member 8 and a control system assembly 6 .

[0049] Specifically, the constraint component 2 is arranged on the base 1, and the constraint component 2 is used to fix the steering system under test. The lateral loading mechanism 3 includes a first column 31 and a first hydraulic component 32. The lower end of the first column 31 is fixed on the base 1, and the first hydraulic component 32 extends along a first direction in a horizontal plane. The upper end of the first column 31 is connected to one end of the first hydraulic component 32. The longitudinal loading mechanism 4 includes a second column 41 and a second hydraulic component 42. The lower end of the second column 41 is fixed on the base 1, and the second hydraulic component 42 extends in a second direction perpendicular to the first direction in a horizontal plane. The upper end of the second column 41 is connected to one end of the second hydraulic component 42, and the other end of the second hydraulic component 42 is connected to the other end of the first hydraulic component 32. The connecting member 8 is arranged on the constraint component 2, one end of the connecting member 8 is connected to the steering system under test, and the other end of the connecting member 8 is connected to the other end of the first hydraulic component 32 and the other end of the second hydraulic component 42. The control system component 6 is electrically connected to the first hydraulic component 32 and the second hydraulic component 42, respectively. Therefore, the steering system automated testing device 100 has a simple structure, an ingenious design, and higher testing accuracy.

[0050] According to the steering system automated test device 100 of the embodiment of the utility model, by setting loading mechanisms in multiple directions, the loading scheme of the steering system test is improved to multi-directional (lateral, vertical, longitudinal) multi-axis loading, which is more consistent with actual user use. At the same time, the utility model takes into account the test verification problem of the mechatronic system's electromechanical composite working condition, as well as the synchronization of mechanical load and electrical signal load, and has higher simulation accuracy.

[0051] Furthermore, the steering system automation test device 100 also includes: a vertical loading mechanism 7, the vertical loading mechanism 7 includes a third hydraulic component 71, the third hydraulic component 71 extends in the up and down directions, the upper end of the third hydraulic component 71 is connected to the other end of the first hydraulic component 32 and the other end of the second hydraulic component 42 and is connected to the connecting component 8, the lower end of the third hydraulic component 71 is arranged on the base 1, and the third hydraulic component 71 is electrically connected to the control system component 6.

[0052] like Figure 3 As shown, one end of the first hydraulic component 32 is pivotally connected to the first column 31, one end of the second hydraulic component 42 is pivotally connected to the second column 41, one end of the third hydraulic component 71 is pivotally connected to the base 1, a pivot bracket is provided between the first hydraulic component 32 and the first column 31, a pivot bracket is also provided between the second hydraulic component 42 and the second column 41, a pivot bracket is also provided between the third hydraulic component 71 and the base 1, and the pivot axes of the three pivot brackets are vertically arranged in pairs, and the first hydraulic component 32, the second hydraulic component 42 and the third hydraulic component 71 are also vertically arranged in pairs.

[0053] In some embodiments of the present invention, Figure 5As shown, the connecting member 8 has a first connecting portion 81, a second connecting portion 82 and a third connecting portion 83, the other end of the first hydraulic member 32 is pivotally connected to the first connecting portion 81, the other end of the second hydraulic member 42 is pivotally connected to the second connecting portion 82, and the third hydraulic member 71 is pivotally connected to the third connecting portion 83. Therefore, the structural design of the connecting member 8 is simple and ingenious, easy to assemble, and can improve the accuracy of the test.

[0054] Furthermore, if Figure 1 As shown, the lateral loading mechanism 3, the longitudinal loading mechanism 4, the vertical loading mechanism 7 and the connecting member 8 each include two, and the two lateral loading mechanisms 3, the two longitudinal loading mechanisms 4, the two vertical loading mechanisms 7 and the two connecting members 8 are all arranged symmetrically about the second direction.

[0055] In some embodiments of the present invention, the connecting member 8 further has a fourth connecting portion 84, such as Figure 5 As shown, the fourth connection part 84 is formed as a ball head mounting hole. The steering system under test includes a steering gear 51, a steering column 52, a steering wheel 200, a steering power motor and a steering system ECU, wherein the steering gear 51 extends along a first direction, the steering gear 51 and the steering column 52 are arranged perpendicular to each other, and the two ends of the steering gear 51 are respectively connected to a fourth connection part 84 of a connecting member 8, one end of the steering column 52 is connected to the steering gear 51 and the other end is connected to the steering wheel 200. The steering gear 51 is connected to the fourth connection part 84 through a ball head pin passing through the ball head mounting hole, so as to be able to adapt to the movement of the connecting member 8 in various directions and angles.

[0056] In some embodiments of the present utility model, the steering system automated test device 100 further includes: a sensor assembly, the sensor assembly includes a first sensor, a second sensor and a third sensor, the first sensor is arranged on the steering system to be tested along the first direction, and the second sensor and the third sensor are both arranged on the connecting member 8. Specifically, the first sensor is a force sensor, the force sensor is arranged on the steering gear 51, the second sensor is a vertical displacement sensor, the third sensor is a longitudinal displacement sensor, and the vertical displacement sensor and the longitudinal displacement sensor are both arranged at the position of the ball stud and the ball stud mounting hole of the steering gear 51.

[0057] In some embodiments of the present invention, the steering system automated test device 100 further includes: a steering torque loading mechanism 9, which is disposed on the constraint assembly 2, and includes: a fixing bracket 91, a driving member 92, a locking member 93 and a screw rod 94. Specifically, Figure 6 and Figure 7As shown, the fixed bracket 91 extends along the first direction, and through holes are formed at both ends of the fixed bracket 91 and penetrate the fixed bracket 91 in the thickness direction. The driving member 92 is arranged on the fixed bracket 91. The locking member 93 includes two, and the two locking members 93 are arranged in a one-to-one correspondence with the through holes. Each locking member 93 is movably arranged in the through hole along the first direction. A through hole is formed on each locking member 93, and an inner peripheral wall of the through hole is formed with an internal thread. The screw rod 94 penetrates the fixed bracket 91 in the length direction of the fixed bracket 91 and passes through the locking member 93. The screw rod 94 can rotate relative to the locking member 93, and an outer peripheral wall of the screw rod 94 is formed with an external thread. The locking member 93 is threadedly connected with the screw rod 94.

[0058] Furthermore, if Figure 6 As shown, the main shaft of the driving member 92 is fixedly connected to the fixed bracket 91, and the two locking members 93 are used to clamp and lock the steering wheel 200. The surfaces of the opposite sides of the two locking members 93 are formed with locking grooves, and the inner circumference of the locking grooves is formed as an arc surface. The steering wheel 200 is suitable for being clamped in the locking grooves. An adjustment handle 95 is provided at one end of the screw rod 94, and the adjustment handle 95 is fixedly connected to the screw rod 94, and is used to rotate the screw rod 94 to adjust the distance between the two locking members 93, so as to facilitate clamping, locking or taking the steering wheel 200, and at the same time can be suitable for steering wheels 200 of different sizes.

[0059] Furthermore, the directions of the internal threads of the two locking members 93 are opposite, so that when the screw rod 94 is rotated to adjust the distance between the two locking members 93, the locking members 93 can move toward the steering wheel 200 at the same time, or move away from the steering wheel 200 at the same time.

[0060] In some embodiments of the present invention, the constraint assembly 2 includes: a support seat 21, a third column 22, a fourth column 23 and a fixing block 24. Specifically, the support seat 21 is fixed on the base 1, the third column 22 is arranged on the support seat 21, the driving member 92 is fixed on the third column 22, the fourth column 23 is arranged on the support seat 21, the fourth column 23 is provided with a mounting bracket 25, the steering column 52 is arranged on the mounting bracket 25, the fixing block 24 is arranged on the support seat 21, and the steering gear 51 is arranged on the fixing block 24. Figure 1 and Figure 2 As shown, a first groove 11 extending along a first direction is formed on the base 1, and a second groove 211 extending along the first direction is also formed on the upper surface of the support seat 21. The cross-sections of the first groove 11 and the second groove 211 are T-shaped, which simplifies the connection method of the components.

[0061] In some embodiments of the present utility model, the control system component 6 includes: a hydraulic control module, a motor control module and a power control module. The hydraulic control module is electrically connected to the first hydraulic component 32, the second hydraulic component 42 and the third hydraulic component 71, the motor control module is electrically connected to the driving component 92, and the power control module is electrically connected to the power supply 10. Specifically, the control system component 6 provides a running platform and a visual interface for various programs and interfaces. The hydraulic control module has a hydraulic system control program for controlling the first hydraulic component 32, the second hydraulic component 42 and the third hydraulic component 71 to load in multiple directions according to test requirements. The motor control module has a motor control program for controlling the steering input torque and angle of the steering wheel 200. The power control module has a power control program for controlling the power supply to the steering system ECU and the steering power motor.

[0062] Furthermore, the control system component 6 also has a synchronous control program for driving the power supply control program, the motor control program and the test state monitoring program in a working state, and ensuring the synchronization of the steering system ECU and the steering power motor and the hydraulic components. The steering system automated test device 100 also includes: a monitoring module, the monitoring module is electrically connected to the steering wheel 200, and the monitoring module has a test state monitoring program for monitoring the steering torque and angle of the steering wheel 200 to ensure that the test is carried out in a normal state, thereby improving the safety of the test. Specifically, the synchronous control program and the test state monitoring program are both control programs designed in currently commonly used programming languages.

[0063] The above components are all electrically connected through a wiring harness 101, the power supply 10 is a voltage-stabilized power supply, and the bus 102 can be a bus of protocols such as CAN, CANFD, and Ethernet.

[0064] In summary, the steering system automated test device 100 provided in the embodiment of the utility model can perform three-way loading and steering wheel torque loading, adapts to the needs of actual working conditions, realizes the verification of electromechanical composite working conditions, can verify both hardware and software, takes into account the synchronization of mechanical load and electrical signal load, and has more accurate measurement results. The test status is monitored by a test status monitoring program, and the test is safer.

[0065] The following will refer to Figure 1-Figure 7 A steering system automated testing device 100 according to a specific embodiment of the present invention is described.

[0066] Reference Figure 1-Figure 7 The steering system automated test device 100 comprises: a base 1, a constraint component 2, a lateral loading mechanism 3, a longitudinal loading mechanism 4, a connecting piece 8, a control system component 6, a vertical loading mechanism 7, a sensor component, a steering torque loading mechanism 9 and a monitoring module.

[0067] Specifically, the constraint assembly 2 is arranged on the base 1, and the constraint assembly 2 is used to fix the steering system under test. The lateral loading mechanism 3 includes a first column 31 and a first hydraulic component 32. The lower end of the first column 31 is fixedly arranged on the base 1, and the first hydraulic component 32 extends in a first direction in a horizontal plane. The upper end of the first column 31 is connected to one end of the first hydraulic component 32. The longitudinal loading mechanism 4 includes a second column 41 and a second hydraulic component 42. The lower end of the second column 41 is fixedly arranged on the base 1, and the second hydraulic component 42 extends in a second direction perpendicular to the first direction in a horizontal plane. The upper end of the second column 41 is connected to one end of the second hydraulic component 42, and the other end of the second hydraulic component 42 is connected to The other end of the first hydraulic component 32 is connected, and the connecting member 8 is arranged on the constraint component 2. One end of the connecting member 8 is connected to the steering system under test, and the other end of the connecting member 8 is connected to the other end of the first hydraulic component 32 and the other end of the second hydraulic component 42. The control system component 6 is electrically connected to the first hydraulic component 32 and the second hydraulic component 42 respectively. The vertical loading mechanism 7 includes a third hydraulic component 71. The third hydraulic component 71 extends in the up and down directions. The upper end of the third hydraulic component 71 is connected to the other end of the first hydraulic component 32 and the other end of the second hydraulic component 42 and is connected to the connecting member 8. The lower end of the third hydraulic component 71 is arranged on the base 1, and the third hydraulic component 71 is electrically connected to the control system component 6.

[0068] The connecting member 8 has a first connecting portion 81, a second connecting portion 82 and a third connecting portion 83. The other end of the first hydraulic member 32 is pivotally connected to the first connecting portion 81, the other end of the second hydraulic member 42 is pivotally connected to the second connecting portion 82, and the third hydraulic member 71 is pivotally connected to the third connecting portion 83.

[0069] The sensing assembly includes a first sensor, a second sensor and a third sensor. The first sensor is a force sensor, which is arranged on the steering gear 51. The second sensor is a vertical displacement sensor. The third sensor is a longitudinal displacement sensor. The vertical displacement sensor and the longitudinal displacement sensor are both arranged at the position of the ball pin and the ball head mounting hole of the steering gear 51.

[0070] The steering torque loading mechanism 9 is arranged on the constraint assembly 2, and the steering torque loading mechanism 9 includes: a fixed bracket 91, a driving member 92, a locking member 93 and a screw rod 94. The fixed bracket 91 extends along the first direction, and both ends of the fixed bracket 91 are formed with through holes that penetrate the fixed bracket 91 in the thickness direction. The driving member 92 is arranged on the fixed bracket 91. The locking member 93 includes two, and the two locking members 93 are arranged one-to-one corresponding to the through holes. Each locking member 93 is movably arranged in the through hole along the first direction. A through hole is formed on each locking member 93, and an inner peripheral wall of the through hole is formed with an internal thread. The screw rod 94 penetrates the fixed bracket 91 in the length direction of the fixed bracket 91 and passes through the locking member 93. The screw rod 94 can rotate relative to the locking member 93, and the outer peripheral wall of the screw rod 94 is formed with an external thread. The locking member 93 is threadedly connected to the screw rod 94.

[0071] The main shaft of the driving member 92 is fixedly connected to the fixed bracket 91, and the two locking members 93 are used to clamp and lock the steering wheel 200. The surfaces of the opposite sides of the two locking members 93 are formed with locking grooves, and the inner circumference of the locking grooves is formed as an arc surface. The steering wheel 200 is suitable for being clamped in the locking grooves. An adjustment handle 95 is provided at one end of the screw rod 94. The adjustment handle 95 is fixedly connected to the screw rod 94 and is used to rotate the screw rod 94 to adjust the distance between the two locking members 93, and the directions of the internal threads of the two locking members 93 are opposite.

[0072] The constraint assembly 2 includes: a support seat 21, a third column 22, a fourth column 23 and a fixed block 24. Specifically, the support seat 21 is fixed on the base 1, the third column 22 is arranged on the support seat 21, the driving member 92 is fixed on the third column 22, the fourth column 23 is arranged on the support seat 21, the fourth column 23 is provided with a mounting bracket 25, the second connecting rod 52 is arranged on the mounting bracket 25, the fixed block 24 is arranged on the support seat 21, the first connecting rod 51 is arranged on the fixed block 24, and a first groove 11 extending along the first direction is formed on the base 1, and a second groove 211 extending along the first direction is also formed on the upper surface of the support seat 21. The cross-section of the first groove 11 and the cross-section of the second groove 211 are T-shaped.

[0073] The control system component 6 includes: a hydraulic control module, a motor control module and a power control module. The hydraulic control module is electrically connected to the first hydraulic component 32, the second hydraulic component 42 and the third hydraulic component 71, the motor control module is electrically connected to the driving component 92, and the power control module is electrically connected to the power supply 10. Specifically, the control system component 6 provides a running platform and a visual interface for various programs and interfaces. The hydraulic control module has a hydraulic system control program for controlling the first hydraulic component 32, the second hydraulic component 42 and the third hydraulic component 71, the motor control module has a motor control program for controlling the input torque and angle of the steering wheel 200, and the power control module has a power control program for controlling the power supply to the steering system ECU and the steering power motor. The control system component 6 also has a synchronization control program for driving the power control program, the motor control program and the test status monitoring program to be in a working state, and ensuring the synchronization of the steering system ECU and the steering power motor with the hydraulic components. The steering system automated test device 100 also includes: a monitoring module, which is electrically connected to the steering system under test. The monitoring module has a test status monitoring program for monitoring the steering torque and angle of the steering wheel 200 to ensure that the test is carried out under normal conditions, thereby improving the safety of the test.

[0074] The following will refer to Figure 8-Figure 10 The test process of the steering system automatic test device 100 according to the above specific embodiment of the present utility model is described.

[0075] The movement of the longitudinal loading mechanism 4 and the vertical loading mechanism 7 is determined by the movement displacement of the outer ball head of the steering gear 51 in the complete vehicle / actual vehicle state, and closed-loop feedback control is performed through the vertical displacement sensor and the longitudinal displacement sensor. The movement of the lateral loading mechanism 3 is determined by the force of the steering gear 51 in the complete vehicle / actual vehicle state, and closed-loop feedback control is performed by the force sensor. The hydraulic system control program communicates with the hydraulic components 32, 42, and 71 through the hydraulic control module to mechanically load the steering system under test; at the same time, the hydraulic system control program communicates with the sensor component through the sensor signal line to form a closed-loop control of the mechanical loading device.

[0076] The hydraulic system control program issues control commands to the hydraulic components 32, 42, 71 while being monitored by the synchronous control program. When the hydraulic components 32, 42, 71 mechanically load the steering system under test, the synchronous control program immediately drives the power control program, the motor control program, and the test status monitoring program to work synchronously, such as Figure 8 shown.

[0077] like Fig. 9The figure shows the logic diagram of electrical signal loading and test status monitoring. The motor control program communicates with the driving member 92 of the steering wheel 200 through the signal line, and can control the steering wheel 200 according to the predetermined steering angle and steering torque. The power supply control program communicates with the power supply 10 through the signal line, and can control the steering system ECU and the steering power motor to be powered on, powered off, or the change of voltage; when powered on, the synchronization control program can send a control signal to the steering system ECU through the bus 102 to achieve synchronization of mechanical load and electrical signal load.

[0078] After the test status monitoring program is controlled by the synchronous control program and enters the working state, it can monitor the steering angle and steering torque of the steering wheel 200 in real time. When the signal is abnormal, it can send an abnormal signal to the hydraulic system control program, the synchronous control program, the power supply control program and the motor control program to suspend the test (such as Fig.10 As shown). The signal collected on the actual vehicle road is f0(t), including the torque signal T0(t) and the angle θ0(t). The signal collected in the steering system bench test is fi(t), including the torque signal Ti(t), the angle θi(t), and the CRC check value CRCi(t). When monitoring the test status, the following requirements are required:

[0079] |fi(t)-f0(t)| <error(t)

[0080] That is:

[0081] |Ti-T0| < error(T) ①

[0082] |θi-θ0| < error(θ) ②

[0083] CKi-CKc = 0 ③

[0084] The error value error(t) in formulas ① and ② is set according to the test accuracy requirement. If the error value is exceeded, it is judged that the object under test has failed or the loading is abnormal, and the test is suspended. In formula ③, CKc is the verification value calculated according to Ti and θi in the test of the steering system automation test device 100. The actual verification value CKi should be equal to the calculated value CKc, otherwise it is judged that the data sent by the ECU of the object under test is abnormal, and the test is suspended.

[0085] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0086] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0087] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0088] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0089] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A steering system automated test device, characterized in that: include: Pedestal; A constraint component, the constraint component is arranged on the base, and the constraint component is used to fix the steering system under test; A side loading mechanism, the side loading mechanism comprising a first column and a first hydraulic component, the lower end of the first column is fixed to the base, the first hydraulic component extends in a first direction in a horizontal plane, and the upper end of the first column is connected to one end of the first hydraulic component; A longitudinal loading mechanism, the longitudinal loading mechanism comprising a second column and a second hydraulic component, the lower end of the second column is fixed to the base, the second hydraulic component extends in a horizontal plane along a second direction perpendicular to the first direction, the upper end of the second column is connected to one end of the second hydraulic component, and the other end of the second hydraulic component is connected to the other end of the first hydraulic component; A connecting member, the connecting member is arranged on the restraint assembly, one end of the connecting member is connected to the steering system to be tested, and the other end of the connecting member is connected to the other end of the first hydraulic component and the other end of the second hydraulic component; A control system component is electrically connected to the first hydraulic component and the second hydraulic component respectively.

2. The steering system automated test device according to claim 1, characterized in that: Also includes: A vertical loading mechanism, the vertical loading mechanism includes a third hydraulic component, the third hydraulic component extends in the up and down directions, the upper end of the third hydraulic component is connected to the other end of the first hydraulic component and the other end of the second hydraulic component and is connected to the connecting component, the lower end of the third hydraulic component is arranged on the base, and the third hydraulic component is electrically connected to the control system component.

3. The steering system automated test device according to claim 2, characterized in that: The connecting member has a first connecting portion, a second connecting portion and a third connecting portion, the other end of the first hydraulic member is pivotally connected to the first connecting portion, the other end of the second hydraulic member is pivotally connected to the second connecting portion, and the third hydraulic member is pivotally connected to the third connecting portion.

4. The steering system automated test device according to claim 2, characterized in that: The lateral loading mechanism, the longitudinal loading mechanism, the vertical loading mechanism and the connecting member each include two, and the two lateral loading mechanisms, the two longitudinal loading mechanisms, the two vertical loading mechanisms and the two connecting members are all arranged symmetrically with respect to the center plane of the base in the second direction.

5. The steering system automated test device according to claim 3, characterized in that: The connecting member further comprises a fourth connecting portion, and two ends of the steering gear of the steering system to be tested are respectively connected to one of the fourth connecting portions.

6. The steering system automated test device according to claim 1, characterized in that: Also includes: The sensor assembly includes a first sensor, a second sensor and a third sensor. The first sensor is arranged on the steering system to be tested along a first direction, and the second sensor and the third sensor are both arranged on the connecting member.

7. The steering system automated test device according to claim 2, characterized in that: Also includes: A steering torque loading mechanism, the steering torque loading mechanism is arranged on the constraint assembly, and the steering torque loading mechanism comprises: A fixing bracket, the fixing bracket extending along the first direction, and through holes penetrating the fixing bracket in the thickness direction are formed at both ends of the fixing bracket; A driving member, wherein the driving member is disposed on the fixing bracket; A locking member, wherein the locking members include two locking members, the two locking members are arranged in one-to-one correspondence with the through holes, each of the locking members is movably arranged in the through hole along the first direction, each of the locking members is formed with a through hole, and an inner peripheral wall of the through hole is formed with an internal thread; A screw rod, the screw rod penetrates the fixing bracket and the locking piece in the length direction of the fixing bracket, the screw rod can rotate relative to the locking piece, an outer peripheral wall of the screw rod is formed with an external thread, and the locking piece is threadedly connected to the screw rod.

8. The steering system automated test device according to claim 7, characterized in that: The directions of the internal threads of the two locking members are opposite.

9. The steering system automated test device according to claim 7, characterized in that: The constraint component includes: A support seat, the support seat is fixedly arranged on the base; A third column, the third column is arranged on the support seat, and the driving member is fixed on the third column; A fourth column, the fourth column is arranged on the support seat, a mounting bracket is arranged on the fourth column, and a steering column of the steering system to be tested is arranged on the mounting bracket; A fixed block is arranged on the support seat, and a steering gear of the steering system to be tested is arranged on the fixed block.

10. The steering system automated test device according to claim 7, characterized in that: The control system component includes: a hydraulic control module, a motor control module and a power control module. The hydraulic control module is electrically connected to the first hydraulic component, the second hydraulic component and the third hydraulic component. The motor control module is electrically connected to the driving component. The power control module is electrically connected to the power supply.

11. The steering system automated test device according to any one of claims 1 to 10, characterized in that: Also includes: A monitoring module is electrically connected to the steering system under test and is used to monitor the steering system under test.

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