A steering wheel damping performance test device

Abstract

The application provides a steering wheel damping performance test device and relates to the technical field of steering wheel testing, which comprises a U-shaped frame and an L-shaped slide column, two T-shaped sliding parts are symmetrically and slidably installed on the two U-shaped installation frames through spring pushing positioning, two semicircular clamps are symmetrically welded at the bottom of the two T-shaped sliding parts, and a rectangular mounting plate is clamped on the steering wheel through the two semicircular clamps; a T-shaped sliding part is slidably arranged on the rectangular mounting plate, two connecting rods are symmetrically and rotatably connected between the T-shaped sliding part and the two T-shaped sliding parts, a thin steel wire rope is connected between the T-shaped sliding part and the U-shaped frame, and the length of the thin steel wire rope is smaller than that of a signal line. In the process of disassembling the steering wheel, when the vibration sensor is forgotten to be loosened and unlocked, the vibration sensor is automatically loosened and unlocked, the vibration sensor is prevented from being torn and pulled away from the signal line, and the signal line is prevented from being torn and pulled off.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steering wheel testing, and particularly relates to a steering wheel damping performance testing device. BACKGROUND

[0002] In order to improve the comfort of the steering wheel, the steering wheel is usually provided with a component for filtering and buffering the vibration transmitted to the steering wheel during the driving of the vehicle. The component makes the steering wheel have damping performance. In the batch manufacturing of the steering wheel, in order to ensure that the damping performance of the steering wheel is qualified, the damping performance of the steering wheel needs to be tested by a testing device.

[0003] The testing device in the field generally detects the steering wheel in the vertical direction and the angle of the steering wheel according to the coordinate system of the whole vehicle. The vibration sensor on the existing testing device is usually fixed on the steering wheel to be tested by a clamp. However, the clamp usually lacks a mechanism for loosening and unlocking the clamp by using the pulling driving force of the steering wheel and the testing device when forgetting to loosen and unlock the clamp, so that the clamp cannot be driven and unlocked by using the above pulling driving force when forgetting to loosen and unlock the clamp during the separation and disassembly of the steering wheel. The vibration sensor will still be clamped on the steering wheel stably, so that the vibration sensor will pull and tear the signal line connected thereto under the action of the separation and disassembly of the steering wheel, which may tear and break the signal line, and affect the normal and effective use of the vibration sensor and the testing device. SUMMARY

[0004] Therefore, the present application provides a steering wheel damping performance testing device to solve the problem that the vibration sensor will pull and tear the signal line connected thereto under the action of the separation and disassembly of the steering wheel when forgetting to loosen and unlock the clamp during the separation and disassembly of the steering wheel.

[0005] The technical scheme provided by the present application is as follows: a steering wheel damping performance testing device, specifically comprising a U-shaped frame and an L-shaped slide column, the L-shaped slide column is slidably installed on the U-shaped frame, the top end of the L-shaped slide column is welded with a thickened mounting column, and the thickened mounting column is installed with a steering wheel to be tested.

[0006] A rectangular mounting plate is clamped and fixed to a connecting arm inside the steering wheel. A vibration sensor is fixedly mounted on one end of the rectangular mounting plate by screwing. An electrical control box is fixedly mounted on the U-shaped frame, and a signal line connects the electrical control box and the vibration sensor. Two U-shaped mounting frames are symmetrically welded to the two long sides of the rectangular mounting plate. Two T-shaped sliding parts, positioned by spring pushes, are symmetrically slidably mounted on the two U-shaped mounting frames. Two semi-circular clamps are symmetrically welded to the bottom of the two T-shaped sliding parts. The rectangular mounting plate is clamped to the steering wheel by the two semi-circular clamps. A T-shaped sliding part is slidably provided on the rectangular mounting plate. Two connecting rods are symmetrically rotatably connected between the T-shaped sliding part and the two T-shaped sliding parts. A thin steel wire rope is connected between the T-shaped sliding part and the U-shaped frame. The length of the thin steel wire rope is less than the length of the signal line.

[0007] Furthermore, a T-shaped groove is provided at the middle position of the rectangular mounting plate in the width direction, the T-shaped sliding part slides in the T-shaped groove, the first end of the connecting rod is hinged to the vertical short shaft on the T-shaped sliding part, and the tail end of the connecting rod is rotatably connected to the horizontal support rod of the T-shaped sliding part.

[0008] The first end of the thin steel wire rope is connected to the top of the vertical short shaft of the T-shaped sliding part. The U-shaped frame is composed of two symmetrically arranged L-shaped support rods and a vertical shaft sleeve welded between the first ends of the L-shaped support rods. The tail end of the thin steel wire rope is connected to the top of the corner part of an L-shaped support rod.

[0009] The electrical control box is installed on one side of the corner of an L-shaped support rod. Inside the electrical control box is a controller for processing vibration signals. The end of the signal line passes through the box wall and connects to the controller.

[0010] Furthermore, the steering wheel is composed of a steering ring, an airbag mounting box located inside the steering ring, and multiple connecting arms that surround and connect the two. A vertical hanging shaft is fixed at the bottom of the airbag mounting box, and two semi-circular clamping plates are abutted and clamped to a connecting arm.

[0011] A sliding ring is mounted on a vertical shaft. A buffer spring is mounted on the part of the vertical shaft between the sliding ring and the airbag mounting box. A trapezoidal frame is welded to the bottom of the sliding ring, and a hexagonal insert is welded to the middle of the bottom of the trapezoidal frame.

[0012] Furthermore, the top part of the thickened mounting column is provided with a slot, and two vertical support blocks are formed on both sides of the slot on the top part of the thickened mounting column. Two rectangular rod sleeves are symmetrically welded in the space on both sides of the two vertical support blocks. Two L-shaped sliding plates are symmetrically slidably installed through the two rectangular rod sleeves and the two vertical support blocks. A hexagonal insertion hole is provided at the bottom of the slot.

[0013] The horizontal base plate of the trapezoidal frame is inserted into the slot, and the hexagonal sleeve is inserted into the hexagonal socket. The parts of the two L-shaped slides that slide out of the vertical support block resist the top of the horizontal base plate of the trapezoidal frame.

[0014] Furthermore, a slip ring is slidably fitted on the thickened mounting post, and two tension springs are symmetrically connected between the slip ring and the bottom side of the thickened mounting post. Two tie rods are symmetrically rotatably connected between the slip ring and the tail ends of the two L-shaped sliding plates.

[0015] Furthermore, the vertical part of the L-shaped sliding column has a hexagonal structure. This vertical part slides through and engages with the vertical shaft sleeve by means of spring push-back reset. When the thickened mounting column slides down with the L-shaped sliding column, it abuts against the vertical shaft sleeve.

[0016] Furthermore, it also includes a base plate, a U-shaped frame welded and fixed to the top of the base plate, a motor fixedly mounted on the top of the base plate, a drive shaft fixedly connected to the motor shaft via a coupling, and a threaded push shaft threaded through the drive shaft.

[0017] Furthermore, a Z-shaped slide rod is slidably mounted through the first end of the drive shaft, a U-shaped mounting frame is welded to the first end of the Z-shaped slide rod, a guide wheel is rotatably mounted on the U-shaped mounting frame, and the smooth rod part at the first end of the threaded push shaft is rotatably engaged with the tail end of the Z-shaped slide rod.

[0018] When the guide wheel follows the Z-shaped slide bar and the drive shaft to rotate, it comes into contact with the horizontal part of the L-shaped slide column.

[0019] The steering wheel shock absorption performance testing device provided by this invention has the following beneficial effects:

[0020] 1. Test the steering wheel in the vertical direction and at the tilt angle of the steering wheel installed on the vehicle, according to the overall vehicle coordinate system. During the disassembly of the steering wheel after the test, if the two semi-circular clamps are not loosened, the vibration sensor will be continuously clamped and fixed to the connecting arm by the two semi-circular clamps. Since the end of the thin steel cable is fixed to the U-shaped frame, the thin steel cable will use the traction force exerted on it when the steering wheel is separated from the thickened mounting column to drive the T-shaped sliding part towards... The vibration sensor slides, and the two semi-circular clamps slide away from each other to automatically release the vibration sensor from the steering wheel. This prevents the two semi-circular clamps from failing to automatically release and continuing to clamp the vibration sensor to the steering wheel if the above-mentioned situation of forgetting to release or unlock occurs. This would prevent the vibration sensor from being torn or pulled along with the separation and disassembly of the steering wheel, thus preventing the signal wire connected to it from being torn or broken. This helps to ensure the normal and effective use of the vibration sensor and testing equipment in the event of the above situation.

[0021] Second, the length of the thin steel wire rope is less than the length of the signal line. This ensures that during the above process, the signal line is straightened before the thin steel wire rope is pulled straight, thus rendering the anti-tear and anti-breakage function of the thin steel wire rope ineffective.

[0022] Third, the slip ring, two tie rods, and two L-shaped sliding plates are connected to form two sets of crank-slider mechanisms. Through these two mechanisms, the simple up-and-down sliding of the slip ring can drive the two L-shaped sliding plates to slide relative to each other, controlling the parts of the two L-shaped sliding plates that protrude from the vertical support block to abut against or separate from the horizontal base plate of the trapezoidal frame, thus completing the locking and unlocking of the trapezoidal frame and the steering wheel. Compared with the design of setting the trapezoidal frame and thickened mounting post to install and position the steering wheel by bolt locking, this can save the trouble of rotating the bolts in both directions and tightening them multiple times when disassembling and assembling the steering wheel before and after testing, which helps to improve the efficiency of steering wheel disassembly and assembly.

[0023] IV. When the threaded drive shaft rotates in both directions, it can propel the Z-shaped slide bar to slide back and forth along its length. Adjusting the distance between the guide wheel and the drive shaft changes the stroke of the Z-shaped slide bar driving the L-shaped slide column up and down, thus adjusting the amplitude of the vibration generated when the L-shaped slide column drives the steering wheel up and down. This is suitable for testing the steering wheel's vibration damping performance under different amplitudes. The speed of the motor and the Z-shaped slide bar can be adjusted by the frequency converter, changing the frequency of the Z-shaped slide bar driving the L-shaped slide column up and down, thus adjusting the vibration frequency when the L-shaped slide column drives the steering wheel up and down. This is suitable for testing the steering wheel's vibration damping performance under different vibration frequencies. Such adjustable Z-shaped slide bar settings and adjustable motor speed settings enable the testing equipment to meet different testing requirements for steering wheels, improving the versatility and practicality of the testing equipment. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0025] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0026] In the attached diagram:

[0027] Figure 1 A frontal side view schematic diagram of the entire invention is shown;

[0028] Figure 2 A schematic diagram of the entire invention from a rear side view is shown;

[0029] Figure 3 A bottom-view schematic diagram of the entire invention is shown;

[0030] Figure 4 A schematic diagram showing the disassembly state of the L-shaped sliding column in this invention is shown;

[0031] Figure 5 A schematic diagram of the installation position of the L-shaped sliding plate in this invention is shown;

[0032] Figure 6 A bottom-side view of the steering wheel in this invention is shown;

[0033] Figure 7 A schematic diagram of the thickened mounting column in this invention is shown;

[0034] Figure 8 This diagram illustrates the disassembled state of the threaded feed shaft and the Z-shaped slide bar in this invention.

[0035] Figure 9 A schematic diagram showing the disassembled state of the vibration sensor and the semi-circular clamp in this invention is shown.

[0036] Figure 10 A schematic diagram of the T-shaped groove in this invention is shown;

[0037] Figure 11 The present invention is shown Figure 1 Enlarged structural diagram of section A;

[0038] Figure 12 The present invention is shown Figure 1 Enlarged structural diagram of section B;

[0039] Figure 13 The present invention is shown Figure 3 Enlarged structural diagram of section C;

[0040] Figure 14 The present invention is shown Figure 5 Enlarged structural diagram of section D.

[0041] List of reference numerals in the attached diagram:

[0042] 1. Substrate; 101. U-shaped frame; 1011. L-shaped support rod; 1012. Vertical bushing;

[0043] 2. L-shaped sliding column; 201. Thickened mounting column; 2011. Rectangular rod sleeve; 2012. L-shaped sliding plate; 2013. Slot; 2014. Vertical support block; 2015. Hexagonal insertion hole;

[0044] 3. Motor; 301. Drive shaft; 302. Threaded feed shaft;

[0045] 4. Steering wheel; 401. Steering ring; 402. Connecting arm; 403. Airbag mounting box; 404. Vertical hanger shaft; 405. Sliding ring; 406. Trapezoidal frame; 4061. Hexagonal bushing;

[0046] 5. Vibration sensor; 501. Signal cable;

[0047] 6. Rectangular mounting plate; 601. U-shaped mounting frame; 6011. T-shaped sliding component; 602. T-shaped sliding part; 603. T-shaped slide groove; 604. Connecting rod;

[0048] 7. Slip ring; 701. Tension spring; 702. Tie rod;

[0049] 8. Z-shaped slide bar; 801. U-shaped mounting frame; 802. Guide wheel;

[0050] 9. Semi-circular clamp;

[0051] 10. Electrical control box;

[0052] 11. Fine steel wire rope; 1101. Restraint ring. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this invention. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. Based on the described embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0054] The following is an embodiment of the present invention, please refer to it. Figures 1 to 14 :

[0055] This embodiment proposes a steering wheel vibration damping performance testing device, including a U-shaped frame 101 and an L-shaped sliding column 2. The L-shaped sliding column 2 is slidably installed on the U-shaped frame 101. A thickened mounting column 201 is welded to the top of the L-shaped sliding column 2. The steering wheel 4 to be tested is installed on the thickened mounting column 201.

[0056] A rectangular mounting plate 6 is clamped and fixed on the steering wheel 4. A vibration sensor 5 is fixedly installed at one end of the rectangular mounting plate 6 by screwing. An electrical control box 10 is fixedly installed on the U-shaped frame 101. A signal line 501 connects the electrical control box 10 and the vibration sensor 5. Two U-shaped mounting frames 601 are symmetrically welded to the two long sides of the rectangular mounting plate 6. Two T-shaped sliding parts 6011, which are positioned by spring push, are symmetrically slidably installed on the two U-shaped mounting frames 601. Two semi-circular clamping plates 9 are symmetrically welded to the bottom of the two T-shaped sliding parts 6011. The rectangular mounting plate 6 is clamped to the steering wheel 4 by the two semi-circular clamping plates 9. A T-shaped sliding part 602 is slidably provided on the rectangular mounting plate 6. Two connecting rods 604 are symmetrically rotatably connected between the T-shaped sliding part 602 and the two T-shaped sliding parts 6011. A thin steel wire rope 11 is connected between the T-shaped sliding part 602 and the U-shaped frame 101.

[0057] Preferably, the steering wheel 4 is composed of a steering ring 401, an airbag mounting box 403 disposed inside the steering ring 401, and multiple connecting arms 402 that surround and connect the two. Two semi-circular clamping plates 9 are abutted and clamped to one connecting arm 402.

[0058] Preferably, a T-shaped groove 603 is provided at the middle position of the rectangular mounting plate 6 in the width direction. The T-shaped sliding part 602 is slidably engaged with the T-shaped groove 603. The first end of the connecting rod 604 is hinged to the vertical short shaft on the T-shaped sliding part 602, and the tail end of the connecting rod 604 is rotatably connected to the horizontal support rod of the T-shaped sliding part 6011. The first end of the thin steel wire rope 11 is connected to the top end of the vertical short shaft of the T-shaped sliding part 602. The U-shaped frame 101 consists of two symmetrically arranged L-shaped support rods 1011 and welded to the first end of the L-shaped support rods 1011. The vertical bushings 1012 between the parts are jointly formed. The tail end of the thin steel wire rope 11 is connected to the top of the corner of an L-shaped support rod 1011. Several constraint rings 1101 are distributed on the thin steel wire rope 11 and are fixedly connected to it. The signal line 501 passes through several constraint rings 1101 in sequence. The electrical control box 10 is installed on one side of the corner of an L-shaped support rod 1011. The electrical control box 10 is equipped with a controller for processing vibration signals. The tail end of the signal line 501 passes through the box wall of the electrical control box 10 and is connected to the controller.

[0059] An LED display screen is embedded in the front side wall of the electrical control box 10. The controller is connected to the LED display screen. The selection of the LED display screen, the controller and the vibration sensor 5, the connection and wiring method between them and the control principle are existing technologies for those engaged in equipment electrification modification, design, maintenance and testing in this field, so they will not be described in detail here.

[0060] A multi-degree-of-freedom robot is arranged below the base plate 1. The base plate 1 is mounted on the multi-degree-of-freedom robot, which is existing technology and is not shown in the figure. By adjusting the output end of the multi-degree-of-freedom robot, the center line of the steering wheel can be adjusted to a preset angle.

[0061] The following is a detailed explanation and description of the working principle, specific details, implementation steps, functions and interrelationships of each feature, and their role in realizing this invention:

[0062] The vibration sensor 5 is clamped and fixed to the steering wheel 4 under test by two semi-circular clamps 9. The vibration sensor 5 is used to monitor the vibration acting on the steering wheel 4 during the vibration damping performance test. During the test, the vibration sensor 5 transmits the vibration signal it detects to the controller in real time through the signal line 501. The controller identifies and quantifies the received vibration signal and calculates the average value of the vibration signal according to the test time. The controller transmits and displays the average value of the vibration amplitude calculated by it on the LED display screen in real time for the staff to view. When the test operation time reaches the specified length, the test operation is stopped and it is checked whether the average amplitude displayed on the LED display screen is greater than the standard test amplitude. If the average amplitude is greater than the standard test amplitude, it is determined that the vibration performance test and comfort of the steering wheel 4 are not suitable. Otherwise, it is determined that the vibration performance test and comfort of the steering wheel 4 are suitable.

[0063] The T-shaped sliding part 602, two connecting rods 604, two T-shaped sliding parts 6011, and two semi-circular clamping plates 9 are connected to form two sets of crank-slider mechanisms. Through these two sets of mechanisms, sliding the T-shaped sliding part 602 toward the vibration sensor 5 can drive the two T-shaped sliding parts 6011 and the two semi-circular clamping plates 9 to slide away from each other, controlling the two semi-circular clamping plates 9 to separate from the connecting arm 402, and releasing and unlocking the rectangular mounting plate 6 and the vibration sensor 5. The springs fitted on the two U-shaped mounting frames 601 can push the two T-shaped sliding parts 6011 and the two semi-circular clamping plates 9 closer to each other, so that the two semi-circular clamping plates 9 are kept in the state of clamping and fixing the vibration sensor 5 to the connecting arm 402.

[0064] During the disassembly of the steering wheel 4 after testing, if the two semi-circular clamps 9 are not properly released, the vibration sensor 5 will remain clamped and fixed to the connecting arm 402 by the two semi-circular clamps 9. Since the end of the thin steel cable 11 is fixed to the U-shaped frame 101, the thin steel cable 11 will utilize the pulling force exerted on it during the separation and disassembly of the steering wheel 4 from the thickened mounting column 201 to drive the T-shaped sliding part 602 to slide towards the vibration sensor 5 (in conjunction with...). Figure 1 , Figure 4 and Figure 11The system controls the two semi-circular clamps 9 to slide away from each other and automatically release the vibration sensor 5 from the steering wheel 4. This prevents the two semi-circular clamps 9 from failing to automatically release and continuing to clamp the vibration sensor 5 onto the steering wheel 4 in the event of forgetting to release or unlock it. This would prevent the vibration sensor 5 from tearing and pulling the signal line 501 connected to it during the separation and disassembly of the steering wheel 4. This helps ensure the normal and effective use of the vibration sensor 5 and the testing equipment in the event of the above situation. It should also be noted that in order to enable the thin steel wire rope 11 to move in a specific direction during the pulling process, a vertical rod can be fixedly installed on the top surface of the rectangular mounting plate 6 near the vibration sensor 5. A ring is fixed at the top of the vertical rod, and a slit is opened at the top of the ring so that the thin steel wire rope 11 can pass through the slit and enter the ring.

[0065] The length of the thin steel wire rope 11 is less than the length of the signal line 501. This ensures that the thin steel wire rope 11 is straightened first during the above process, thus preventing the signal line 501 from being straightened and broken, which would cause the anti-tear and breakage function of the thin steel wire rope 11 on the signal line 501 to fail.

[0066] Several constraint rings 1101 can confine the signal line 501 and the thin steel wire rope 11 together, allowing the signal line 501 to be constrained and limited by the thin steel wire rope 11, which has a certain rigidity and supporting strength. This prevents the flexible signal line 501 from lacking necessary constraint and becoming disorderly and messy, easily entangled with various moving components on the testing equipment, and being torn apart by these components. Embodiment Two, based on Embodiment One, adds the following content compared to Embodiment One:

[0067] A vertical hanging shaft 404 is fixed to the bottom of the airbag mounting box 403; a sliding ring 405 is slidably mounted on the vertical hanging shaft 404; a buffer spring is mounted on the part of the vertical hanging shaft 404 between the sliding ring 405 and the airbag mounting box 403; a trapezoidal frame 406 is welded to the bottom of the sliding ring 405; a hexagonal insert 4061 is welded to the middle of the bottom of the trapezoidal frame 406; a slot 2013 is opened at the top of the thickened mounting post 201; two vertical support blocks 2014 are formed on both sides of the slot 2013 at the top of the thickened mounting post 201. Two rectangular sleeves 2011 are symmetrically welded to the space on both sides of the two vertical support blocks 2014. Two L-shaped sliding plates 2012 are symmetrically slidably installed through the two rectangular sleeves 2011 and the two vertical support blocks 2014. A hexagonal insertion hole 2015 is opened at the bottom of the slot 2013. The horizontal base plate of the trapezoidal frame 406 is inserted into the slot 2013. The hexagonal sleeve 4061 is inserted into the hexagonal insertion hole 2015. The part of the two L-shaped sliding plates 2012 that slides out of the vertical support blocks 2014 abuts against the top of the horizontal base plate of the trapezoidal frame 406.

[0068] Preferably, a slip ring 7 is slidably fitted on the thickened mounting post 201, and two tension springs 701 are symmetrically connected between the slip ring 7 and the bottom part of the thickened mounting post 201. Two pull rods 702 are symmetrically rotatably connected between the slip ring 7 and the tail ends of the two L-shaped sliding plates 2012.

[0069] Preferably, the vertical part of the L-shaped sliding column 2 has a hexagonal structure. The vertical part slides through and engages with the vertical shaft sleeve 1012 in a manner that is reset by spring push. When the thickened mounting column 201 slides down with the L-shaped sliding column 2, it abuts against the vertical shaft sleeve 1012.

[0070] Preferably, the U-shaped frame 101 is welded and fixed to the top of the substrate 1, and a motor 3 is fixedly installed on the top of the substrate 1. A drive shaft 301 is fixedly connected to the rotating shaft of the motor 3 through a coupling, and a threaded push shaft 302 is threadedly installed through the drive shaft 301.

[0071] Preferably, a Z-shaped slide rod 8 is slidably mounted through the first end of the drive shaft 301. A U-shaped mounting frame 801 is welded to the first end of the Z-shaped slide rod 8. A guide wheel 802 is rotatably mounted on the U-shaped mounting frame 801. The smooth rod portion at the first end of the threaded push shaft 302 is rotatably engaged with the tail end of the Z-shaped slide rod 8. When the guide wheel 802 rotates with the Z-shaped slide rod 8 and the drive shaft 301, it abuts against the horizontal portion of the L-shaped slide column 2.

[0072] The electrical control box 10 is also equipped with a frequency converter that controls the speed and start / stop of the motor 3. The frequency converter is electrically connected to the motor 3. The selection of the frequency converter model and the control principle of the motor 3 are existing technologies for those engaged in equipment electrification modification, design, maintenance and testing in this field, so they will not be described in detail here.

[0073] The following is a detailed explanation and description of the working principle, specific details, implementation steps, functions and interrelationships of each feature, and their role in realizing this invention:

[0074] By adjusting the output end of the multi-degree-of-freedom robot, the center line of the steering wheel can be adjusted to a preset angle. Then, starting the motor 3 drives the drive shaft 301 to rotate at a high speed. Through the power transmission of the Z-shaped slide bar 8 and the guide wheel 802, when the drive shaft 301 is driven to rotate, it can push and drive the L-shaped slide bar 2 to compress the spring mounted on it and slide upward. During this process, when the guide wheel 802 separates from the horizontal part of the L-shaped slide bar 2, the spring on the L-shaped slide bar 2 loses the upward sliding holding force from the Z-shaped slide bar 8, and can push back to drive the Z-shaped slide bar 8 to automatically slide down and reset. Thus, through the power transmission of the Z-shaped slide bar 8 and the guide wheel 802, and in conjunction with the rebound and pushing effect of the spring on the L-shaped slide bar 2, the motor 3 can rotate to drive the L-shaped slide bar 2 and the steering wheel 4 mounted on the thickened mounting column 201 to slide up and down at a high frequency. When the steering wheel 4 is driven to slide up and down, the sliding inertial force converted from its gravity can compress the spring mounted on the vertical hanging shaft 404, so as to simulate the inertial impact force acting on the elastic buffer component of the steering wheel 4 when the vehicle is driving bumpy during the test, and test the shock absorption performance of the steering wheel 4.

[0075] The parts of the two L-shaped sliding plates 2012 that slide out from the vertical support block 2014 can block and position the trapezoidal frame 406 in the slot 2013. When the trapezoidal frame 406 is positioned in the slot 2013, it is used together with the hexagonal sleeve 4061 that engages with the hexagonal socket 2015 to position the steering wheel 4 as a whole at the top of the thickened mounting post 201, preventing the steering wheel 4 from separating from the thickened mounting post 201 during testing. The slip ring 7, the two pull rods 702, and the two L-shaped sliding plates 2012 are connected to form two sets of crank-slider mechanisms. Through these two mechanisms, the two L-shaped sliding plates 2012 can be driven to slide relative to each other by simply moving the slip ring 7 up and down, thus controlling the two L-shaped sliding plates 2012. The portion protruding from the vertical support block 2014 abuts against or detaches from the horizontal base plate of the trapezoidal frame 406, completing the locking and unlocking of the trapezoidal frame 406 and the steering wheel 4. Compared to the design of using bolts to lock the trapezoidal frame 406 and the thickened mounting post 201 for installation and positioning of the steering wheel 4, this eliminates the hassle of rotating the bolts in both directions and tightening them multiple times before and after testing, thus improving the efficiency of disassembling and assembling the steering wheel 4. The tension spring 701 can pull and drive the slip ring 7 down, and pull and fix the slip ring 7 in a low position, so that the two L-shaped sliding plates 2012 are kept in a positioning state where they slide towards each other and abut against the horizontal base plate of the trapezoidal frame 406 (see reference). Figure 7 ).

[0076] When the threaded drive shaft 302 rotates in both directions, it can drive the Z-shaped slide bar 8 to slide back and forth along its length. Adjusting the distance between the guide wheel 802 and the drive shaft 301 changes the stroke of the Z-shaped slide bar 8 driving the L-shaped slide column 2 to slide up and down, thus adjusting the amplitude of the vibration generated when the L-shaped slide column 2 drives the steering wheel 4 to slide up and down. This is suitable for testing the vibration damping performance of the steering wheel 4 under different amplitudes. The speed of the motor 3 and the Z-shaped slide bar 8 can be adjusted by the frequency converter, changing the frequency of the Z-shaped slide bar 8 driving the L-shaped slide column 2 to slide up and down, thus adjusting the vibration frequency when the L-shaped slide column 2 drives the steering wheel 4 to slide up and down. This is suitable for testing the vibration damping performance of the steering wheel 4 under different vibration frequencies. Such sliding adjustment of the Z-shaped slide bar 8 and the adjustable speed of the motor 3 enable the testing equipment to meet different testing requirements of the steering wheel 4, improving the versatility and practicality of the testing equipment.

[0077] The following points should be noted in this article:

[0078] 1. The accompanying drawings of the embodiments of the present invention only involve the structures involved in the embodiments of the present invention; other structures can refer to general designs.

[0079] 2. Where there is no conflict, the embodiments of the present invention and the features thereof can be combined with each other to obtain new embodiments.

[0080] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A steering wheel damping performance testing device, comprising a U-shaped frame (101) and an L-shaped sliding column (2), wherein the L-shaped sliding column (2) is slidably mounted on the U-shaped frame (101), and a thickened mounting column (201) is welded to the top of the L-shaped sliding column (2), and a steering wheel (4) to be tested is mounted on the thickened mounting column (201). Its features are, A rectangular mounting plate (6) is clamped and fixed on the steering wheel (4). A vibration sensor (5) is fixedly installed on one end of the rectangular mounting plate (6) by screwing. An electrical control box (10) is fixedly installed on the U-shaped frame (101). A signal line (501) is connected between the electrical control box (10) and the vibration sensor (5). Two U-shaped mounting frames (601) are symmetrically welded to the two long sides of the rectangular mounting plate (6). Two T-shaped sliding parts (6011) are symmetrically slidably installed on the two U-shaped mounting frames (601) by spring pushing. Two semi-circular clamps (9) are symmetrically welded to the bottom of the T-shaped sliding member (6011). The rectangular mounting plate (6) is clamped to the steering wheel (4) by the two semi-circular clamps (9). A T-shaped sliding part (602) is slidably provided on the rectangular mounting plate (6). Two connecting rods (604) are symmetrically rotatably connected between the T-shaped sliding part (602) and the two T-shaped sliding members (6011). A thin steel wire rope (11) is connected between the T-shaped sliding part (602) and the U-shaped frame (101). The length of the thin steel wire rope (11) is less than the length of the signal line (501).

2. The steering wheel vibration damping performance testing device according to claim 1, characterized in that, The rectangular mounting plate (6) has a T-shaped groove (603) in the middle of its width direction. The T-shaped sliding part (602) slides in conjunction with the T-shaped groove (603). The first end of the connecting rod (604) is hinged to the vertical short shaft on the T-shaped sliding part (602), and the tail end of the connecting rod (604) is rotatably connected to the horizontal support rod of the T-shaped sliding member (6011). The first end of the thin steel wire rope (11) is connected to the top of the vertical short shaft of the T-shaped sliding part (602). The U-shaped frame (101) is composed of two symmetrically arranged L-shaped support rods (1011) and a vertical bushing (1012) welded between the first ends of the L-shaped support rods (1011). The tail end of the thin steel wire rope (11) is connected to the top of the corner of an L-shaped support rod (1011). The electrical control box (10) is installed on one side of the corner of an L-shaped support rod (1011). The electrical control box (10) is equipped with a controller for processing vibration signals. The end of the signal line (501) passes through the box wall of the electrical control box (10) and is connected to the controller.

3. The steering wheel vibration damping performance testing device according to claim 1, characterized in that, The steering wheel (4) is composed of a steering ring (401), an airbag mounting box (403) located inside the steering ring (401), and multiple connecting arms (402) that surround and connect the two. A vertical hanging shaft (404) is fixed at the bottom of the airbag mounting box (403), and two semi-circular clamps (9) are abutted and clamped to one connecting arm (402). A sliding ring (405) is mounted on a vertical shaft (404). A buffer spring is mounted on the part of the vertical shaft (404) between the sliding ring (405) and the airbag mounting box (403). A trapezoidal frame (406) is welded to the bottom of the sliding ring (405). A hexagonal insert (4061) is welded to the middle of the bottom of the trapezoidal frame (406).

4. The steering wheel vibration damping performance testing device according to claim 3, characterized in that, The top part of the thickened mounting post (201) is provided with a slot (2013). Two vertical support blocks (2014) are formed on both sides of the slot (2013) on the top part of the thickened mounting post (201). Two rectangular rod sleeves (2011) are symmetrically welded in the space on both sides of the two vertical support blocks (2014). Two L-shaped sliding plates (2012) are symmetrically slidably installed through the two rectangular rod sleeves (2011) and the two vertical support blocks (2014). The bottom end of the slot (2013) is provided with a hexagonal insertion hole (2015). The horizontal base plate of the trapezoidal frame (406) is inserted into the slot (2013), the hexagonal sleeve (4061) is inserted into the hexagonal hole (2015), and the parts of the two L-shaped slide plates (2012) that slide out of the vertical support block (2014) abut against the top of the horizontal base plate of the trapezoidal frame (406).

5. The steering wheel damping performance testing device according to claim 4, characterized in that, The thickened mounting post (201) is fitted with a sliding ring (7), and two tension springs (701) are symmetrically connected between the sliding ring (7) and the bottom part of the thickened mounting post (201). Two pull rods (702) are symmetrically rotatably connected between the sliding ring (7) and the tail ends of the two L-shaped sliding plates (2012).

6. The steering wheel vibration damping performance testing device according to claim 2, characterized in that, The vertical part of the L-shaped sliding column (2) has a hexagonal structure. The vertical part slides through the vertical bushing (1012) in the form of spring push-back reset. When the thickened mounting column (201) slides down with the L-shaped sliding column (2), it abuts against the vertical bushing (1012).

7. The steering wheel vibration damping performance testing device according to claim 1, characterized in that, It also includes a base plate (1), a U-shaped frame (101) welded and fixed to the top of the base plate (1), a motor (3) fixedly installed on the top of the base plate (1), a drive shaft (301) fixedly connected to the shaft of the motor (3) by a coupling, and a threaded push shaft (302) threaded through the drive shaft (301) in the form of threaded screwing.

8. The steering wheel damping performance testing device according to claim 7, characterized in that, The drive shaft (301) has a Z-shaped slide rod (8) slidably mounted on its first end. A U-shaped mounting frame (801) is welded to the first end of the Z-shaped slide rod (8). A guide wheel (802) is rotatably mounted on the U-shaped mounting frame (801). The smooth rod part at the first end of the threaded push shaft (302) is rotatably engaged with the tail end of the Z-shaped slide rod (8). When the guide wheel (802) rotates following the Z-shaped slide bar (8) and the drive shaft (301), it comes into contact with the horizontal part of the L-shaped slide bar (2).

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