Excitation device for impact noise test of power-assisted steering device

Abstract

The utility model relates to the field of automobile testing, and discloses an excitation device for impact noise testing of a power-assisted steering device, which comprises a test board, a mounting seat for mounting a power-assisted steering assembly is arranged on the test board in a front-and-back sliding manner, sliding seats are arranged on the test board in a left-and-right sliding manner and positioned on two sides of the mounting seat, and driving parts are vertically arranged on the sliding seats in a sliding manner. The driving piece is used for being connected with the end of the power-assisted steering assembly and used for applying loads to the power-assisted steering assembly. According to a virtual map adopted in the testing process or according to the actual condition, a specific rotation signal is input to the driving piece, the driving piece applies specific torque to the two ends of the power-assisted steering assembly according to an instruction, and the impact force borne by the power-assisted steering assembly under the dynamic working condition that wheels are impacted by a road surface can be simulated; and the noise generated by the power-assisted steering assembly under the impact can be detected in real time, and the effect of accurate experimental data is achieved.

Description

Technical Field

[0001] This utility model relates to the field of automotive testing, specifically to an excitation device for testing the impact noise of a power steering device. Background Technology

[0002] Noise testing of the power steering system is an important part of the performance evaluation of the electric power steering (EPS) system in automobiles. The bottom of the power steering assembly is equipped with a mounting position for mounting the test device. The purpose is to ensure that the noise level of the steering system meets the standard requirements under different operating conditions, thereby improving the driving experience and vehicle safety.

[0003] Traditional power steering noise testing often uses static or steady-state loading methods, which cannot realistically simulate the instantaneous torque impact of the wheel under dynamic road impact conditions, resulting in a deviation between the noise test results and the actual working conditions. To address this issue, the following improvements are proposed. Utility Model Content

[0004] The present invention aims to provide an excitation device for testing the impact noise of a power steering device, in order to solve the problem that previous tests could not realistically simulate the noise under dynamic working conditions of a wheel being impacted by the road surface.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an excitation device for testing the impact noise of a power steering device, comprising a test bench, a mounting seat for mounting a power steering assembly is slidably arranged on the test bench, sliding seats are slidably arranged on both sides of the mounting seat, a driving component is vertically slidably arranged on the sliding seats, the driving component is used to connect with the end of the power steering assembly, and the driving component is used to apply a load to the power steering assembly.

[0006] The beneficial effects of this solution are as follows: based on the virtual map used in the test or based on the actual situation, a specific rotation signal is input to the drive component. The drive component applies a specific amount of torque to both ends of the power steering assembly according to the command. Compared with the existing technology, it can simulate the impact force on the power steering assembly under the dynamic working condition of the wheel being hit by the road surface, and can detect the noise emitted by the power steering assembly under impact in real time, thereby achieving the goal of accurate experimental data.

[0007] Furthermore, the test stand has a first sliding groove for the mounting seat to slide back and forth. The mounting seat includes a base that slides back and forth to the first sliding groove, a mounting block that slides left and right to the top of the base, and a tooling that slides back and forth to the top of the mounting block. The tooling is used to connect with the mounting position of the steering assembly.

[0008] The beneficial effects of this solution are: the mounting block above the base can slide left and right, and can be adjusted according to the steering assist assembly of different lengths, so that steering assist assemblies of different lengths can be installed using tooling.

[0009] Furthermore, the test stand has a second sliding groove horizontally provided for the sliding seat to slide left and right. The sliding seat is slidably connected to the test stand through the second sliding groove. The test stand is rotatably connected to a lead screw, which is threadedly connected to the sliding seat. The lead screw is used to drive the sliding seat to slide on the test stand.

[0010] Furthermore, the sliding seat is vertically provided with a guide rod for the drive component to slide up and down. The guide rod passes through the drive component, and the drive component is also connected with a positioning bolt, which is used to fix the position of the drive component on the sliding seat.

[0011] The beneficial effects of this solution are as follows: Different vehicles under test have different internal dimensions and structures, so the installation height of the power steering assembly is also different. Since the drive components are used to connect to both ends of the power steering assembly, the installation height of the power steering assembly is also different. At this time, by adjusting the height of the drive components on both sides of the test bench, power steering assemblies with different installation heights can be connected, which can achieve the purpose of multi-selective testing.

[0012] Furthermore, the driving component is set as a motor.

[0013] Furthermore, a swing arm is fixedly installed at the bottom of the motor output shaft. The swing arm has several connection positions for connecting with the power steering assembly. These connection positions are arranged radially and are at different distances from the shaft center.

[0014] The beneficial effects of this scheme are as follows: the rotation of the motor shaft drives the swing arm to rotate. For steering power assemblies of different lengths, the stroke on both sides is also different. Therefore, in order to make the experiment more realistic, for steering power assemblies of different lengths, they need to be installed on connection positions with different radial distances.

[0015] Furthermore, a flexible coupling is connected between the control arm and the power steering assembly, and a torque sensor is installed on the flexible coupling.

[0016] Furthermore, a motor driver is installed on the motor, and a PID controller is set on the control panel. The torque sensor and the motor driver are both electrically connected to the PID controller.

[0017] The beneficial effects of this solution are as follows: the motor driver receives a signal of a specific torque and drives the motor to rotate according to this signal. The rotation of the motor is converted into linear movement by the swing arm. During this process, the flexible coupling identifies the actual output torque of the motor and transmits the data signal to the PID controller. The PID controller calculates the error between the input signal and the actual output based on the detected torque information. Then, based on the magnitude, trend and time accumulation of the error, it performs proportional, integral and derivative operations respectively, thereby generating a control signal based on the difference and transmitting it to the motor driver to achieve precise adjustment of the motor. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0019] Figure 2 This is a partial structural diagram of the connection between the mounting base and the test bench in an embodiment of this utility model;

[0020] Figure 3 This is a partial structural diagram of the connection between the motor's swing arm and the steering assembly in an embodiment of the present invention. Detailed Implementation

[0021] The following detailed description illustrates the specific implementation method:

[0022] The reference numerals in the accompanying drawings include: test bench 1, first slide rail 11, second slide rail 12, lead screw 13, mounting base 2, base 21, mounting block 22, tooling 23, sliding seat 3, guide rod 31, motor 32, swing arm 321, connection position 3211, motor driver 322, power steering assembly 4, mounting position 41, flexible coupling 5, and torque sensor 51.

[0023] Example

[0024] An excitation device for testing impact noise in power steering systems, such as Figures 1-3As shown, the test platform 1 is located at the bottom. A first sliding groove 11 is horizontally formed in the middle of the test platform 1. A mounting base 2 is slidably connected to the top of the test platform 1 via the first sliding groove 11. The mounting base 2 includes a base 21 slidably connected to the test platform 1 via the first sliding groove 11. A screw is threaded onto the base 21, passing through the base 21 and abutting against the test platform 1. When the position of the mounting base 2 needs to be adjusted by sliding the base 21, the screw on the base 21 is loosened, and then the base 21 is manually slid. After the position of the base 21 is fixed, the screw on the base 21 is tightened to firmly abut against the test platform 1, thereby fixing it to the test platform 1. The upper surface is also horizontally provided with a sliding groove arranged in the left and right direction. The top of the base 21 is slidably connected to the mounting block 22, and the mounting block 22 is also threadedly connected to the screw. The screw is fixed to the base 21 in the same way. The top of the mounting block 22 is also horizontally provided with a sliding groove arranged in the front and back direction. The top of the mounting block 22 is slidably connected to the tooling 23 for connecting with the mounting position 41 of the power steering assembly 4. The tooling 23 is also fixed to the mounting block 22 by a bolt connected in the thread and pressed against the surface of the mounting block 22. The mounting seat 2 can be adjusted according to the internal conditions of the vehicle body to adapt to different installation sizes and installation conditions.

[0025] like Figures 1-3 As shown, the test platform 1 has symmetrical horizontal second slide grooves 12 on the left and right sides. The first slide groove 11 is arranged in the front-back direction, and the second slide groove 12 is arranged in the left-right direction. The test platform 1 is slidably connected to the slide seat 3 through the second slide groove 12. The slide seat 3 is provided with a slider that is embedded in the second slide groove 12. The test platform 1 has a lead screw 13 rotatably installed on both sides. The end of the lead screw 13 is provided with an operating disc for manually driving its rotation. The bottom of the slide seat 3 is fixedly installed with a threaded seat for threaded connection of the lead screw 13. The lead screw 13 passes through the threaded seat and drives the slide seat 3 to move on the test platform 1 through the threaded seat. The test platform 1 is fixedly welded with a lead screw 13 seat. The lead screw 13 is rotatably connected to the lead screw 13 seat, and a bearing is connected between the lead screw 13 and the lead screw 13 seat.

[0026] Guide rods 31 are fixedly and vertically installed on both sides of the sliding seat 3, and T-shaped guide grooves are also vertically opened. The motor 32 is vertically slidably connected to the sliding seat 3. A connecting seat is welded to the side of the motor 32 near the sliding seat 3. A T-shaped guide block is fixedly connected to the connecting seat. The T-shaped guide block is embedded in the T-shaped guide groove. The connecting seat is also opened with a guide hole for the guide rods 31 to pass through. A positioning bolt is rotatably connected to the connecting seat. The positioning bolt protrudes from the side of the connecting seat near the sliding frame. Rotating the positioning bolt and pressing it against the sliding seat 3 can fix the motor 32 in the corresponding position of the sliding seat 3.

[0027] like Figures 1-3As shown, the shaft of motor 32 is located at the bottom of motor 32. A swing arm 321 is coaxially fixedly connected to the bottom of the shaft of motor 32. At least two connection positions 3211 are provided on the swing arm 321 at different radial distances from the axis of the shaft of motor 32. The connection positions 3211 pass through the holes of the swing arm 321 vertically. A power steering assembly 4 is installed on the mounting base 2. A flexible coupling 5 is connected between the end of the power steering assembly 4 and the swing arm 321. A torque sensor 51 is installed on the flexible coupling 5. A torque sensor 51 is vertically fixed at the end of the flexible coupling 5 near the swing arm 321. A connecting shaft passes through the connecting position 3211 of the swing arm 321. The connecting shaft of the flexible coupling 5 is rotatably connected to the hole-shaped connecting position 3211 of the swing arm 321, thereby realizing the transformation of the rotation of the motor 32 into the linear movement of the flexible coupling 5. For steering gears of different lengths and strokes, the sliding seats 3 on both sides of the test bench 1 are adjusted by the lead screw 13, and the connecting shaft of the flexible coupling 5 is connected to the connecting positions 3211 at different radial positions on the swing arm 321, thereby satisfying the steering power assist assemblies of different lengths and strokes and conducting tests.

[0028] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An excitation device for testing the impact noise of a power steering device, characterized in that: The test bench includes a mounting base for mounting the power steering assembly that is slidably arranged back and forth on the test bench. Sliding seats are slidably arranged on both sides of the mounting base on the test bench. A driving component is vertically slidably arranged on the sliding seat. The driving component is used to connect with the end of the power steering assembly and to apply a load to the power steering assembly.

2. The excitation device for impact noise testing of power steering devices according to claim 1, characterized in that: The test bench has a first sliding groove for the mounting seat to slide back and forth. The mounting seat includes a base that slides back and forth to the first sliding groove, a mounting block that slides left and right to the top of the base, and a tooling that slides back and forth to the top of the mounting block. The tooling is used to connect with the mounting position of the steering assembly.

3. The excitation device for impact noise testing of a power steering device according to claim 1, characterized in that: The test bench has a second sliding groove for the sliding seat to slide left and right. The sliding seat is slidably connected to the test bench through the second sliding groove. The test bench is rotatably connected to a lead screw, which is threadedly connected to the sliding seat. The lead screw is used to drive the sliding seat to slide on the test bench.

4. The excitation device for impact noise testing of a power steering device according to claim 3, characterized in that: The sliding seat is vertically provided with a guide rod for the drive component to slide up and down. The guide rod passes through the drive component, which is also connected to a positioning bolt. The positioning bolt is used to fix the position of the drive component on the sliding seat.

5. The excitation device for impact noise testing of a power steering device according to claim 1, characterized in that: The driving component is a motor.

6. The excitation device for impact noise testing of a power steering device according to claim 5, characterized in that: A swing arm is fixedly installed at the bottom of the motor output shaft. Several connection positions for connecting with the power steering assembly are opened on the swing arm. The connection positions are arranged radially and at different distances from the center of the shaft.

7. The excitation device for impact noise testing of a power steering device according to claim 6, characterized in that: A flexible coupling connects the control arm and the power steering assembly, and a torque sensor is installed on the flexible coupling.

8. The excitation device for impact noise testing of a power steering device according to claim 7, characterized in that: The motor is equipped with a motor driver, and the control panel is equipped with a PID controller. The torque sensor and the motor driver are both electrically connected to the PID controller.

Images