Steering wheel vibration testing device

Abstract

The invention relates to a steering wheel vibration testing device, and belongs to the technical field of new energy automobile accessory testing, the steering wheel vibration testing device comprises a testing table body, the testing table body is composed of a box body, a controller and a cover plate, and the top of the box body is provided with a rotation driving mechanism; the box body is internally provided with a multi-direction reciprocating structure for providing up-down and front-back vibration excitation for the rotary driving mechanism, and the box body is internally provided with an impact simulation mechanism and a transmission mechanism which are respectively linked with the multi-direction reciprocating structure and the rotary driving mechanism; the multi-direction reciprocating structure comprises a reciprocating structure and a connecting rod structure. The steering wheel vibration testing device has the advantages of being flexible in control, high in testing precision and the like, vibration synthesis and torque simulation of the steering wheel in multiple directions are achieved, the problems that a traditional testing device is single in vibration direction, large in energy loss, unreal in testing and the like are solved, the actual driving vibration environment is comprehensively and truly simulated, and the testing accuracy and reliability are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of new energy vehicle accessory testing, in particular to a steering wheel vibration testing device. BACKGROUND

[0002] In the research and production process of new energy vehicles, the vibration performance of the steering wheel is one of the key factors affecting driving comfort and safety. Accurate testing of the vibration of the steering wheel under different working conditions is crucial for optimizing vehicle design and improving product quality.

[0003] Existing steering wheel vibration testing devices mostly use a motor to drive a rotating disc, then transmit power to a power arm through a power rod and lever mechanism, and generate up-down vibration using the lever principle. However, in actual driving, the steering wheel will be subjected to vibration excitation from multiple directions, such as up-down vibration caused by uneven road surface, torque vibration during vehicle turning, and multi-directional impact vibration caused by sudden situations such as collisions. The existing device can only achieve single-direction up-down vibration, which may result in differences in vibration intensity at different parts, and cannot reproduce the periodic torque vibration effect on the steering wheel during turning, which will affect the accurate evaluation of the steering wheel vibration performance and reduce the reliability of the test. It cannot truly simulate the complex vibration environment of the steering wheel in actual driving, resulting in a large deviation between the test results and the actual situation.

[0004] Therefore, it is urgent to improve the steering wheel vibration testing device to solve the above problems. SUMMARY

[0005] In view of the shortcomings of the prior art, the present application provides a steering wheel vibration testing device, which has the advantages of flexible control, high testing precision, etc., realizes the vibration synthesis and torque simulation of the steering wheel in multiple directions, overcomes the problems of single vibration direction, large energy loss, and unrealistic testing of traditional testing devices, fully and truly simulates the actual driving vibration environment, and improves the testing accuracy and reliability.

[0006] To achieve the above purpose, the present application provides the following technical scheme: a steering wheel vibration testing device, comprising a test bed body, the test bed body is composed of a box body, a controller and a cover plate, the top of the box body is provided with a rotary drive mechanism, the inside of the box body is provided with a multi-directional reciprocating structure for providing up-down and front-back direction vibration excitation to the rotary drive mechanism, the inside of the box body is provided with a impact simulation mechanism and a transmission mechanism respectively linked with the multi-directional reciprocating structure and the rotary drive mechanism; The multi-directional reciprocating structure comprises a reciprocating structure and a connecting rod structure, the reciprocating structure comprises a fixed seat fixedly connected to the inner wall of the box body, the outer part of the fixed seat is fixedly connected with a sliding seat, the inner part of the sliding seat is slidingly connected with a moving rod, the bottom end of the moving rod is fixedly connected with a slotted sliding rod, the top end of the moving rod is fixedly connected with a guide seat, the inner part of the guide seat is slidingly connected with a sliding block, and the top of the sliding block is fixedly connected with a support plate. The rotating driving mechanism comprises a fixing mechanism and a rotating mechanism, the fixing mechanism comprises a fixed disc arranged on the top of the support plate, an acceleration sensor is fixedly installed on the top of the fixed disc, a first clamping plate is fixedly connected to the top of the fixed disc, a second clamping plate is detachably connected to the top of the first clamping plate, a locking knob is threadedly connected between the first clamping plate and the second clamping plate, and an abutting structure for simulating torque vibration effect is further arranged on the lower surface of the fixed disc.

[0007] Further, the connecting rod structure comprises a limiting plate fixedly connected to the outer part of the sliding seat, the outer part of the limiting plate is hingedly connected with an oscillating rod, the top end of the oscillating rod is hingedly connected with a connecting rod, the end of the connecting rod away from the oscillating rod is hingedly connected with the support plate, and the support plate is reciprocatingly slidingly connected to the upper surface of the guide seat through the oscillating rod.

[0008] Further, the acceleration sensor and the controller are electrically connected, the number of the first clamping plates, the second clamping plates and the locking knobs is multiple, and the multiple first clamping plates, the second clamping plates and the locking knobs are sequentially arranged in a ring shape on the top of the fixed disc.

[0009] Further, the rotating mechanism comprises a forward-reverse motor fixedly installed on the top of the support plate, a worm is fixedly connected to the output shaft of the forward-reverse motor, a worm wheel meshing with the worm is fixedly installed on the bottom of the fixed disc through a connecting shaft, and the fixed disc is rotationally connected to the top of the support plate through the connecting shaft.

[0010] Further, the abutting structure comprises a fixed plate fixedly connected to the top of the cover plate and a sliding rod slidingly connected to the inner part of the fixed disc and extending to the lower surface of the fixed disc, the top of the fixed plate is provided with a swash plate, a plurality of elastic expansion rods are hingedly connected between the fixed plate and the swash plate, the bottom end of the sliding rod is rotationally connected with a ball through a mounting sleeve, the ball is rollingly connected to the top of the swash plate, an abutting spring is fixedly connected between the bottom of the fixed disc and the mounting sleeve, and the abutting spring is connected to the outer part of the sliding rod.

[0011] Further, the impact simulation mechanism comprises a mounting box fixedly connected to the inner wall of the box body and a piston cylinder, the inside of the mounting box is rotationally connected with an impeller, the inside of the piston cylinder is slidably connected with a plug plate, the outside of the plug plate is fixedly connected with a plug rod extending to the outside of the piston cylinder, the end of the plug rod away from the plug plate is fixedly connected with an abutting block, the end of the abutting block away from the plug rod is fixedly connected with a rubber cushion, and the outside of the abutting block abuts against the support plate.

[0012] Further, the mounting box and the piston cylinder are fixedly connected with a conveying pipe, the abutting block and the piston cylinder are fixedly connected with a return spring, the return spring is connected around the outside of the plug rod, the top of the piston cylinder is fixedly connected with a pressure relief valve, the outside of the abutting block is fixedly connected with a limiting rod extending to the outside of the box body, and the limiting rod is slidably connected to the inside of the box body.

[0013] Further, the transmission mechanism comprises a motor seat and a limiting seat fixedly connected to the inner bottom wall of the box body, the inside of the motor seat is fixedly installed with a double-shaft motor, one end of the output shaft of the double-shaft motor is fixedly connected with the shaft center of the impeller, the inside of the limiting seat is rotationally connected with a rotating shaft, one end of the rotating shaft is fixedly installed with an eccentric block, the eccentric block is rollingly connected to the inside of the slotted slide rod, the outer diameter of the eccentric block is matched with the inner diameter of the slotted slide rod, the top end of the eccentric block is fixedly connected with a crank, and the crank and the swing rod are hingedly connected with a reciprocating rod.

[0014] Further, the other end of the output shaft of the double-shaft motor is fixedly connected with a transmission gear, the end of the rotating shaft away from the eccentric block is fixedly connected with a driven gear engaged with the transmission gear, and the slotted slide rod is connected to the inside of the box body through the up-down reciprocating swing of the eccentric block.

[0015] Further, the controller is fixedly installed to the outside of the box body, and the cover plate is detachably connected to the outside of the box body.

[0016] Compared with the prior art, the present application provides a steering wheel vibration test device, which has the following advantages: 1、The steering wheel vibration test device, through the swing of the swing rod around the hinge point of the limiting plate, drives the connecting rod to move, and then makes the support plate reciprocate on the guide seat, which can convert the up-down movement of the slotted slide rod into the front-back movement of the support plate, and realize the reciprocating vibration of the steering wheel in the up-down and front-back directions together with the reciprocating structure, thereby enriching the vibration direction and making the test more comprehensively simulate the vibration situation in actual driving.

[0017] 2、The steering wheel vibration test device, through the positive and negative rotation motor drives the worm to rotate, and then drives the worm gear and the fixed disc to do periodic positive and negative rotation, simulates the torque vibration when the vehicle turns, and the abutment structure is through the elastic expansion rod, the inclined disc and other components, so that the fixed disc is subjected to additional torque effect in the process of positive and negative rotation, further enhances the authenticity of torque vibration simulation, and can accurately restore the periodic torque vibration effect of the steering wheel in the steering process.

[0018] 3、The steering wheel vibration test device, through the transmission mechanism drives the impeller to rotate to produce airflow, drives the plug plate and plug rod to move, drives the abutment block to displace so that the support plate impacts the abutment block in reciprocating motion, simulates the multidirectional impact vibration generated by sudden situations such as collision, the rubber cushion can buffer the impact force, avoid damaging the device, can truly restore the impact situation of the steering wheel in actual driving, improve the comprehensiveness of the test.

[0019] 4、The steering wheel vibration test device, through the double-shaft motor simultaneously drives the impeller and the rotating shaft to rotate, through the eccentric block, the crank and other components to transmit power to the multidirectional reciprocating structure and the impact simulation mechanism, realizes the linkage between the mechanisms, ensures the synchronism and coordination of multidirectional vibration, improves the accuracy and reliability of the test. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the overall structure of the steering wheel vibration test device of the application; Figure 2 It is the structure of the steering wheel vibration test device of the application; Figure 3 It is the connection structure diagram of the multidirectional reciprocating structure, the rotary drive mechanism, the impact simulation mechanism and the driving mechanism of the steering wheel vibration test device of the application; Figure 4 It is the structure diagram of the multidirectional reciprocating structure of the steering wheel vibration test device of the application; Figure 5 It is the structure diagram of the rotary drive mechanism of the steering wheel vibration test device of the application; Figure 6 It is the structure diagram of the abutment structure of the steering wheel vibration test device of the application; Figure 7 It is the structure diagram of the driving mechanism of the steering wheel vibration test device of the application; Figure 8 It is the structure diagram of the impact simulation mechanism of the steering wheel vibration test device of the application; Figure 9 It is the local structure diagram of the impact simulation mechanism of the steering wheel vibration test device of the application.

[0021] In the diagram: 1. Test bench; 11. Housing; 12. Controller; 13. Cover plate; 2. Multi-directional reciprocating structure; 21. Fixed base; 22. Slide block; 23. Limiting plate; 24. Moving rod; 25. Slotted slide rod; 26. Guide seat; 27. Slider; 28. Support plate; 29. ​​Swing rod; 210. Connecting rod; 3. Rotary drive mechanism; 31. Fixed plate; 32. Accelerometer; 33. First clamping plate; 34. Second clamping plate; 35. Locking knob; 36. Forward and reverse motor; 37. Worm gear; 38. Worm wheel; 39. Sliding rod; 310. 311. Ball bearing; 312. Abutment spring; 313. Fixing plate; 314. Elastic telescopic rod; 315. Swashplate; 4. Impact simulation mechanism; 41. Mounting box; 42. Impeller; 43. Piston cylinder; 44. Conveying pipe; 45. Plug plate; 46. Plug rod; 47. Abutment block; 48. Return spring; 49. Pressure relief valve; 410. Limiting rod; 5. Transmission mechanism; 51. Motor base; 52. Dual-shaft motor; 53. Transmission gear; 54. Limiting seat; 55. Rotating shaft; 56. Eccentric block; 57. Driven gear; 58. Crank; 510. Reciprocating rod. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figures 1 to 9 The steering wheel vibration testing device in this embodiment includes a test platform 1, which is composed of a housing 11, a controller 12 and a cover plate 13. A rotary drive mechanism 3 is provided on the top of the housing 11. A multi-directional reciprocating structure 2 is provided inside the housing 11 to provide vibration excitation in the up-down and back-forward directions for the rotary drive mechanism 3. An impact simulation mechanism 4 and a transmission mechanism 5 are provided inside the housing 11, which are respectively linked to the multi-directional reciprocating structure 2 and the rotary drive mechanism 3. The controller 12 is fixedly installed on the outside of the housing 11, while the cover 13 is detachably connected to the outside of the housing 11. Fixing the controller 12 to the outside of the housing 11 facilitates operator control and parameter setting of the testing device. Through electrical signal connection with components such as the acceleration sensor 32, the vibration of the steering wheel can be monitored in real time, and the motion parameters of each mechanism can be adjusted according to a preset program, achieving automated testing and improving testing efficiency and accuracy. The detachable cover 13 facilitates the installation, debugging, and maintenance of components inside the housing 11. Simultaneously, the cover 13 protects internal components from external dust and debris, extending the device's service life.

[0024] Specifically, the multi-directional reciprocating structure 2 includes a reciprocating structure and a linkage structure. The reciprocating structure includes a fixed seat 21 fixedly connected to the inner wall of the housing 11. A slide seat 22 is fixedly connected to the outside of the fixed seat 21. A moving rod 24 is slidably connected inside the slide seat 22. A slotted slide rod 25 is fixedly connected to the bottom end of the moving rod 24. A guide seat 26 is fixedly connected to the top end of the moving rod 24. A slider 27 is slidably connected inside the guide seat 26. A support plate 28 is fixedly connected to the top of the slider 27. By swinging the swing rod 29 around the hinge point of the limiting plate 23, the linkage 210 is driven to move, thereby causing the support plate 28 to slide back and forth on the guide seat 26. This structure can convert the up-and-down movement of the slotted slide rod 25 into the back-and-forth movement of the support plate 28, and together with the reciprocating structure, realize the reciprocating vibration of the steering wheel in the up-and-down and back-and-forth directions, enriching the vibration directions and making the test more comprehensively simulate the vibration situation in actual driving.

[0025] It should be noted that the linkage structure includes a limiting plate 23 fixedly connected to the outside of the slide block 22. A swing rod 29 is hinged to the outside of the limiting plate 23. A connecting rod 210 is hinged to the top of the swing rod 29. The end of the connecting rod 210 away from the swing rod 29 is hinged to the support plate 28. The support plate 28 is reciprocally slidably connected to the upper surface of the guide seat 26 through the swing rod 29.

[0026] Please see Figure 2 , Figure 3 , Figures 5 to 6 In this embodiment, the rotary drive mechanism 3 includes a fixing mechanism and a rotating mechanism. The fixing mechanism includes a fixing plate 31 disposed on the top of the support plate 28. An acceleration sensor 32 is fixedly installed on the top of the fixing plate 31. A first clamping plate 33 is fixedly connected to the top of the fixing plate 31. A second clamping plate 34 is detachably connected to the top of the first clamping plate 33. A locking knob 35 is threaded between the first clamping plate 33 and the second clamping plate 34. The lower surface of the fixing plate 31 is also provided with an abutment structure for simulating torque vibration effect.

[0027] The accelerometer 32 and controller 12 are electrically connected. Multiple first clamping plates 33, second clamping plates 34, and locking knobs 35 are arranged in a ring on the top of the fixed plate 31. The locking knobs 35 tightly connect the first clamping plates 33 and second clamping plates 34, accommodating steering wheels of different sizes and shapes, thus improving the device's versatility. Simultaneously, the evenly distributed clamping plate structure ensures uniform force on the steering wheel during testing, preventing inaccurate test results due to insecure fixing or uneven force, ensuring uniform vibration intensity in different parts, and improving test reliability.

[0028] Specifically, the rotating mechanism includes a reversible motor 36 fixedly mounted on the top of the support plate 28. A worm gear 37 is fixedly connected to the output shaft of the reversible motor 36. A worm wheel 38, meshing with the worm gear 37, is fixedly mounted on the bottom of the fixed disk 31 via a connecting shaft. The fixed disk 31 is rotatably connected to the top of the support plate 28 via the connecting shaft. By using a reversible motor 36 to drive the worm gear 37, and the worm gear 37 meshing with the worm wheel 38 to drive the fixed disk 31 to rotate, the stability of the fixed disk 31 during rotation can be ensured, reducing swaying and errors during vibration. Furthermore, because the transmission of the worm gear 37 and the worm wheel 38 has self-locking properties, the reversible motor 36 can precisely control the forward and reverse rotation angle and frequency of the fixed disk 31, simulating torque vibration under different steering conditions, making the test more accurate and detailed.

[0029] It should be noted that the abutment structure includes a fixed plate 312 fixedly connected to the top of the cover plate 13 and a sliding rod 39 slidably connected inside the fixed disk 31 and extending to its lower surface. A sloping plate 314 is provided at the top of the fixed plate 312. Multiple elastic telescopic rods 313 are hinged between the fixed plate 312 and the sloping plate 314. A ball bearing 310 is rotatably connected to the bottom of the sliding rod 39 via a mounting sleeve. The ball bearing 310 is rollingly connected to the top of the sloping plate 314. An abutment spring 311 is fixedly connected between the bottom of the fixed disk 31 and the mounting sleeve, and the abutment spring 311 is surrounding the outside of the sliding rod 39. When the fixed disk 31 rotates in both directions, the ball bearing 310 rolls on the sloping plate 314. Due to the tilt angle of the sloping plate 314 and the elasticity of the elastic telescopic rod 313, the sliding rod 39 will displace vertically, thereby applying additional torque to the fixed disk 31 through the abutment spring 311. This structure can more realistically simulate the complex torque vibrations experienced by the steering wheel during steering, improving the accuracy and realism of the test.

[0030] Please see Figure 1 , Figure 2 , Figures 8 to 9In this embodiment, the impact simulation mechanism 4 includes a mounting box 41 and a piston cylinder 43 fixedly connected to the inner wall of the housing 11. An impeller 42 is rotatably connected inside the mounting box 41, and a stopper plate 45 is slidably connected inside the piston cylinder 43. A stopper rod 46 extending to the outside of the piston cylinder 43 is fixedly connected to the outside of the stopper plate 45. An abutment block 47 is fixedly connected to the end of the stopper rod 46 away from the stopper plate 45, and a rubber pad is fixedly connected to the end of the abutment block 47 away from the stopper rod 46. The abutment block 47 abuts against the outside of the support plate 28. The impeller 42 inside the mounting box 41 is driven to rotate by the dual-shaft motor 52 to generate airflow, which enters the piston cylinder 43 through the delivery pipe 44, pushing the stopper plate 45 and the stopper rod 46 to move, causing the abutment block 47 to move closer to the support plate 28. This helps the support plate 28 to impact the abutment block 47 during the return stroke, thereby simulating multi-directional impact vibrations caused by sudden situations such as collisions. This can realistically reproduce the impact situation of the steering wheel in actual driving and improve the comprehensiveness of the test. The rubber pads on the abutment block 47 can cushion the impact force, prevent damage to the support plate 28 and the steering wheel, and extend the service life of the device.

[0031] A delivery pipe 44 is fixedly connected between the mounting box 41 and the piston cylinder 43. A return spring 48 is fixedly connected between the abutment block 47 and the piston cylinder 43. The return spring 48 is wrapped around the outside of the piston rod 46. A pressure relief valve 49 is fixedly connected to the top of the piston cylinder 43. A limiting rod 410 extending to the outside of the box 11 is fixedly connected to the outside of the abutment block 47. The limiting rod 410 is slidably connected to the inside of the box 11. The return spring 48 enables the abutment block 47 to quickly return to its original position after an impact, preparing for the next impact and ensuring the continuity and stability of the impact simulation.

[0032] By setting a pressure relief valve 49, the pressure inside the piston cylinder 43 can be automatically released when the pressure is too high, preventing damage to the device due to excessive pressure and improving the safety of the device. The limit rod 410 can limit the range of motion of the abutment block 47, preventing excessive movement from damaging the device and ensuring the accuracy and stability of the impact simulation.

[0033] Please see Figure 2 , Figure 3 and Figure 7In this embodiment, the transmission mechanism 5 includes a motor base 51 and a limiting seat 54 fixedly connected to the bottom wall of the housing 11. A dual-shaft motor 52 is fixedly installed inside the motor base 51. One end of the output shaft of the dual-shaft motor 52 is fixedly connected to the shaft of the impeller 42. A rotating shaft 55 is rotatably connected inside the limiting seat 54. An eccentric block 56 is fixedly installed at one end of the rotating shaft 55. The eccentric block 56 is tactilely connected to the inside of the slotted slide rod 25. The outer diameter of the eccentric block 56 matches the inner diameter of the slotted slide rod 25. A crank 58 is fixedly connected to the top of the eccentric block 56. A reciprocating rod 510 is hinged between the crank 58 and the swing rod 29. By setting the transmission mechanism 5 as an integrated structure, multiple transmission components are concentrated inside the housing 11, reducing the footprint of the device and improving space utilization. At the same time, the compact structure also helps to reduce energy loss and improve transmission efficiency.

[0034] Among them, a transmission gear 53 is fixedly connected to the output shaft of the other end of the dual-axis motor 52, and a driven gear 57 that meshes with the transmission gear 53 is fixedly connected to the end of the rotating shaft 55 away from the eccentric block 56. The slotted slide rod 25 is connected to the inside of the housing 11 by swinging up and down through the eccentric block 56.

[0035] The working principle of the above embodiments is as follows: Place the steering wheel to be tested on the fixed plate 31 of the rotary drive mechanism 3, clamp it with the first clamp 33 and the second clamp 34, and then fix it with the locking knob 35. The multiple clamps and knobs are arranged in a ring to ensure a firm grip. The controller 12 is installed outside the housing 11 and is used to set parameters and control the start-up to prepare for the test. When the dual-shaft motor 52 of the transmission mechanism 5 is started, the output shaft at one end drives the rotating shaft 55 to rotate via the transmission gear 53 and the driven gear 57. The eccentric block 56 causes the slotted slide bar 25 to swing up and down, which in turn drives the moving rod 24 and the guide seat 26 to move up and down. At the same time, the crank 58 at the top of the eccentric block 56 drives the swing rod 29 and the connecting rod 210 via the reciprocating rod 510, which causes the support plate 28 to slide back and forth on the guide seat 26, providing up and down and back and forth vibration excitation for the rotary drive mechanism 3, simulating the vibration of uneven road surface. When the forward and reverse motor 36 of the rotary drive mechanism 3 is started, the worm 37 drives the fixed disk 31 connected to the worm wheel 38 to rotate, simulating steering wheel turning. In the abutment structure on the lower surface of the fixed disk 31, the swash plate 314 rotates with the fixed disk 31, and the ball 310 rolls on the swash plate 314 to make the sliding rod 39 move up and down. Through the abutment spring 311, a periodic up and down force is generated on the fixed disk 31, simulating torque vibration. The output shaft of the other end of the dual-shaft motor 52 drives the impeller 42 in the mounting box 41 to rotate and generate airflow. The airflow enters the piston cylinder 43 through the delivery pipe 44, pushing the stop plate 45, the stop rod 46 and the abutment block 47 to move. During the reciprocating return stroke, the support plate 28 hits the rubber pad on the abutment block 47 to simulate collision vibration. After the airflow pressure is released, the return spring 48 resets the abutment block 47. The pressure relief valve 49 prevents the pressure in the piston cylinder 43 from being too high, and the limit rod 410 limits the movement range of the abutment block 47. During the test, the acceleration sensor 32 on the top of the fixed plate 31 collects the acceleration data of the steering wheel vibration in different directions in real time and transmits it to the controller 12. The controller 12 processes and analyzes the data to obtain parameters such as the vibration frequency and amplitude of the steering wheel under different working conditions, evaluates its vibration performance, and judges whether the stability and comfort meet the standards. If they do not meet the standards, the R&D personnel can optimize the steering wheel design, improve product quality, and ensure driving experience and safety.

[0036] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. Any method that can achieve its beneficial effect can be implemented. In addition, the electrical components in this embodiment are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device such as a computer that plays a control role. Those skilled in the art can control the electrical components through simple programming. Moreover, the existing disclosed power connection technology is also common knowledge in the field. Therefore, the specific structural composition and working principle will not be described in detail in this embodiment.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A steering wheel vibration testing device, characterized in that: The test platform (1) is composed of a box (11), a controller (12) and a cover plate (13). A rotary drive mechanism (3) is provided on the top of the box (11). A multi-directional reciprocating structure (2) is provided inside the box (11) to provide vibration excitation in the up-down and back-forward directions for the rotary drive mechanism (3). An impact simulation mechanism (4) and a transmission mechanism (5) are provided inside the box (11) respectively linked with the multi-directional reciprocating structure (2) and the rotary drive mechanism (3). The multi-directional reciprocating structure (2) includes a reciprocating structure and a linkage structure. The reciprocating structure includes a fixed seat (21) fixedly connected to the inner wall of the housing (11). A slide seat (22) is fixedly connected to the outside of the fixed seat (21). A moving rod (24) is slidably connected inside the slide seat (22). A slotted slide rod (25) is fixedly connected to the bottom end of the moving rod (24). A guide seat (26) is fixedly connected to the top end of the moving rod (24). A slider (27) is slidably connected inside the guide seat (26). A support plate (28) is fixedly connected to the top of the slider (27). The rotary drive mechanism (3) includes a fixing mechanism and a rotating mechanism. The fixing mechanism includes a fixing plate (31) disposed on the top of the support plate (28). An acceleration sensor (32) is fixedly installed on the top of the fixing plate (31). A first clamping plate (33) is fixedly connected to the top of the fixing plate (31). A second clamping plate (34) is detachably connected to the top of the first clamping plate (33). A locking knob (35) is threaded between the first clamping plate (33) and the second clamping plate (34). The lower surface of the fixing plate (31) is also provided with an abutment structure for simulating torque vibration effect.

2. The steering wheel vibration testing device according to claim 1, characterized in that: The linkage structure includes a limiting plate (23) fixedly connected to the outside of the slide (22). A swing rod (29) is hinged to the outside of the limiting plate (23). A connecting rod (210) is hinged to the top of the swing rod (29). The end of the connecting rod (210) away from the swing rod (29) is hinged to the support plate (28). The support plate (28) is reciprocally slidably connected to the upper surface of the guide seat (26) through the swing rod (29).

3. The steering wheel vibration testing device according to claim 1, characterized in that: The acceleration sensor (32) and the controller (12) are connected by electrical signals. There are multiple first clamps (33), second clamps (34) and locking knobs (35). Multiple first clamps (33), second clamps (34) and locking knobs (35) are arranged in a ring shape on the top of the fixed plate (31).

4. The steering wheel vibration testing device according to claim 1, characterized in that: The rotating mechanism includes a forward and reverse motor (36) fixedly installed on the top of the support plate (28). A worm gear (37) is fixedly connected to the output shaft of the forward and reverse motor (36). A worm wheel (38) that meshes with the worm gear (37) is fixedly installed on the bottom of the fixed plate (31) through a connecting shaft. The fixed plate (31) is rotatably connected to the top of the support plate (28) through a connecting shaft.

5. The steering wheel vibration testing device according to claim 1, characterized in that: The abutment structure includes a fixed plate (312) fixedly connected to the top of the cover plate (13) and a sliding rod (39) slidably connected to the inside of the fixed disk (31) and extending to its lower surface. The top of the fixed plate (312) is provided with a sloping plate (314). A plurality of elastic telescopic rods (313) are hinged between the fixed plate (312) and the sloping plate (314). The bottom end of the sliding rod (39) is rotatably connected to a ball (310) through a mounting sleeve. The ball (310) is slidably connected to the top of the sloping plate (314). An abutment spring (311) is fixedly connected between the bottom of the fixed disk (31) and the mounting sleeve. The abutment spring (311) is connected around the outside of the sliding rod (39).

6. The steering wheel vibration testing device according to claim 1, characterized in that: The impact simulation mechanism (4) includes a mounting box (41) and a piston cylinder (43) fixedly connected to the inner wall of the housing (11). An impeller (42) is rotatably connected inside the mounting box (41). A stopper plate (45) is slidably connected inside the piston cylinder (43). A stopper rod (46) extending to the outside of the piston cylinder (43) is fixedly connected to the outside of the stopper plate (45). An abutment block (47) is fixedly connected to one end of the stopper rod (46) away from the stopper plate (45). A rubber pad is fixedly connected to one end of the abutment block (47) away from the stopper rod (46). The abutment block (47) abuts against the outside of the support plate (28).

7. A steering wheel vibration testing device according to claim 6, characterized in that: A delivery pipe (44) is fixedly connected between the mounting box (41) and the piston cylinder (43). A return spring (48) is fixedly connected between the abutment block (47) and the piston cylinder (43). The return spring (48) is connected around the outside of the piston rod (46). A pressure relief valve (49) is fixedly connected to the top of the piston cylinder (43). A limiting rod (410) extending to the outside of the box (11) is fixedly connected to the outside of the abutment block (47). The limiting rod (410) is slidably connected to the inside of the box (11).

8. A steering wheel vibration testing device according to claim 6, characterized in that: The transmission mechanism (5) includes a motor base (51) and a limiting seat (54) fixedly connected to the bottom wall of the housing (11). A dual-shaft motor (52) is fixedly installed inside the motor base (51). One end of the output shaft of the dual-shaft motor (52) is fixedly connected to the shaft of the impeller (42). A rotating shaft (55) is rotatably connected inside the limiting seat (54). An eccentric block (56) is fixedly installed at one end of the rotating shaft (55). The eccentric block (56) is tumbled inside the slotted slide bar (25). The outer diameter of the eccentric block (56) is matched with the inner diameter of the slotted slide bar (25). A crank (58) is fixedly connected to the top of the eccentric block (56). A reciprocating rod (510) is hinged between the crank (58) and the swing rod (29).

9. A steering wheel vibration testing device according to claim 8, characterized in that: A transmission gear (53) is fixedly connected to the output shaft of the other end of the dual-axis motor (52). A driven gear (57) that meshes with the transmission gear (53) is fixedly connected to the end of the rotating shaft (55) away from the eccentric block (56). The slotted slide rod (25) is connected to the inside of the housing (11) by swinging up and down through the eccentric block (56).

10. A steering wheel vibration testing device according to claim 1, characterized in that: The controller (12) is fixedly installed on the outside of the housing (11), and the cover plate (13) is detachably connected to the outside of the housing (11).

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