Testing device for visually evaluating steer-by-wire mechanism

Abstract

The utility model discloses a test device for visually evaluating a steer-by-wire mechanism. The test device comprises a test bed, a first fixing column, a first mounting frame, a vehicle load simulation module, a detection unit, a second fixing column, a second mounting frame, a mechanical steering mechanism and an electric power steering system. The second fixing column is fixedly connected with the test bed, and the second mounting rack is connected to the second fixing column; the mechanical transmission mechanism comprises a first steering wheel and a steering column, the first steering wheel is fixedly connected with the steering column, and the steering column is mounted on the second mounting frame; the electric power-assisted steering system comprises an electric power-assisted steering main body, a driving unit, a control unit and a power-assisted unit, the electric power steering main body is connected with the vehicle load simulation module; the driving unit is connected with the second end of the steering column; the control unit is in communication connection with the power assisting unit, and the power assisting unit is connected with the driving unit and used for driving the driving unit to operate. According to the testing device, the performance of the to-be-tested steer-by-wire mechanism can be visually evaluated through the first steering wheel.

Description

Technical Field

[0001] The present application relates to the technical field of steer-by-wire mechanisms, and in particular, to a testing device for intuitively evaluating steer-by-wire mechanisms. Background Art

[0002] As the development trend of future steering technology and the necessary equipment for autonomous driving, all OEMs and steering component companies are currently investing a lot of manpower and material resources in the research and development of wire-controlled steering mechanisms. At present, the test device used for the known wire-controlled steering mechanism is composed of the mounting structure of the wire-controlled steering mechanism to be tested, the electric steering system, the vehicle load simulation module, the fixed test bench and various sensors. The test data of various sensors can be used for data analysis to evaluate the performance indicators of the wire-controlled steering mechanism. However, for tests such as steering hysteresis, steering overshoot, steering oscillation, etc., it is impossible to intuitively evaluate the performance indicators, resulting in incomplete test results, which hinders the research and development of wire-controlled steering mechanisms. Utility Model Content

[0003] To solve at least one aspect of the above problems, the utility model provides a test device for intuitively evaluating a wire-controlled steering mechanism, comprising a test bench, a first fixed column, a first mounting frame, a vehicle load simulation module and a detection unit, and also comprising a second fixed column, a second mounting frame, a mechanical steering mechanism, and an electric power steering system; the bottom end of the first fixed column is fixedly connected to the test bench, the first mounting frame is connected to the top end of the first fixed column, and the first mounting frame is used to install the wire-controlled steering mechanism to be tested; the vehicle load simulation module is fixedly connected to the test bench to simulate the vehicle load; the detection unit comprises a plurality of sensors, the plurality of sensors are connected near the first fixed column, and are used to detect a plurality of test parameters of the wire-controlled steering mechanism to be tested; the bottom end of the second fixed column is fixedly connected to the test bench, and the second mounting frame is connected to the top end of the first fixed column, and the first mounting frame is used to install the wire-controlled steering mechanism to be tested; The top of the second fixed column; the mechanical transmission mechanism includes a first steering wheel and a steering column, the first steering wheel is fixedly connected to the first end of the steering column, and the steering column is installed on the second mounting frame; the electric power steering system is fixed on the test bench; the electric power steering system includes an electric power steering body, a drive unit, a control unit and a power unit; the electric power steering body is connected to the vehicle load simulation module; the drive unit is connected to the second end of the steering column; the control unit is communicatively connected to the power unit, and the power unit is connected to the drive unit for driving the drive unit to operate; the control unit is used to communicate with the wire-controlled steering mechanism to be tested; during the test, the wire-controlled steering mechanism to be tested sends a signal to the control unit, the control unit drives the drive unit to operate through the power unit, and the drive unit drives the first steering wheel to rotate through the steering column.

[0004] Through the above technical scheme, the test device of the present application can be obtained by making simple modifications to the existing test device, that is, replacing the electric steering system with an electric power steering system, adding a second fixed column and a second fixed frame on the test bench to install the added mechanical steering mechanism, and mechanically connecting the mechanical steering mechanism to the drive unit of the electric power steering system; when testing is required, the wire-controlled steering mechanism to be tested is installed on the first mounting frame, and the wire-controlled steering mechanism is communicatively connected to the control unit of the electric power steering system, the wire-controlled steering mechanism to be tested sends a signal to the control unit, the control unit drives the drive unit to operate through the power steering unit, and the drive unit drives the first steering wheel to rotate through the steering column, and the performance of the wire-controlled steering mechanism to be tested can be intuitively evaluated through the first steering wheel, and the test device of the present application has low modification cost and short cycle, which helps to shorten the research and development cycle of the wire-controlled steering mechanism and reduce the research and development cost of the wire-controlled steering mechanism.

[0005] Preferably, the driving unit includes a rack and a driving gear, and the power unit includes a motor and a transmission gear; the rack is slidably connected to the electric power steering body along the extension direction of the electric power steering body, the transmission gear and the driving gear are both meshed with the rack, the driving gear is fixedly connected to the second end of the steering column, the transmission gear is fixedly connected to the output shaft of the motor, and the motor is communicatively connected to the control unit. Through the above technical scheme, a specific structure of replacing the electric power steering system is disclosed, the wire-controlled steering mechanism to be tested sends a signal through the communication connection with the control unit, the control unit controls the motor to rotate, the motor drives the transmission gear to rotate, the transmission gear drives the rack to move, the rack drives the driving gear to rotate, and the driving gear drives the first steering wheel to rotate through the steering column, so as to realize the intuitive evaluation of the wire-controlled steering mechanism to be tested.

[0006] Preferably, the rack includes a first tooth portion and a second tooth portion, and the transmission gear and the driving gear are respectively meshed with the first tooth portion and the second tooth portion.

[0007] Preferably, a steering angle sensor is connected to the steering column to detect the rotation angle of the mechanical steering mechanism. Through the above technical solution, a sensor is provided on the newly added mechanical steering mechanism to accurately detect the operating condition of the mechanical steering mechanism, thereby improving the accuracy of intuitive evaluation.

[0008] Preferably, the first fixing column and the second fixing column are arranged side by side along the extension direction of the dynamic power steering body to facilitate intuitive observation.

[0009] Preferably, the first mounting frame and the second mounting frame are arranged side by side, so that the first steering wheel is arranged side by side with the steering wheel of the steer-by-wire mechanism to be tested, which is convenient for intuitive observation.

[0010] Preferably, the second mounting frame includes a second fixing portion and a second connecting portion; the second fixing portion is sleeved on the second fixing rod and fixedly connected to the second fixing rod by bolts; the second connecting portion includes a second connecting plate and two second connecting claws; the second connecting plate is connected to the side surface of the outer wall of the second fixing portion; the two second connecting claws are respectively fixedly connected at the two ends of the first surface of the second connecting plate, and are both fixedly connected to the steering column housing by bolts.

[0011] Preferably, the second mounting frame also includes a second connecting shaft and a second clamp; the second connecting shaft is perpendicular to and fixedly connected to the side of the outer wall of the second fixing portion; the second clamp is clamped on the second connecting shaft, and its side is fixedly connected to the second surface of the second connecting plate, so as to adjust the position and angle of the first steering wheel.

[0012] Preferably, a plurality of universal wheels are fixedly connected to the bottom surface of the test bench to facilitate movement.

[0013] The utility model provides a testing device for intuitively evaluating a wire-controlled steering mechanism, which has the following beneficial effects:

[0014] By replacing the steering system on the existing test device with an electric power steering system, adding a second fixed column and a second fixed frame on the test bench for installing the added mechanical steering mechanism, and mechanically connecting the mechanical steering mechanism to the drive unit of the electric power steering system, the test device is transformed, and the transformation difficulty, transformation cost and cycle are low; when testing is required, the wire-controlled steering mechanism to be tested is installed on the first mounting frame, and the wire-controlled steering mechanism is communicatively connected with the control unit of the electric power steering system, the wire-controlled steering mechanism to be tested sends a signal to the control unit, the control unit drives the drive unit to operate through the power unit, and the drive unit drives the first steering wheel to rotate through the steering column, and the performance of the wire-controlled steering mechanism to be tested can be intuitively evaluated through the first steering wheel, and the test result of the wire-controlled steering mechanism to be tested can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to better understand the above and other purposes, features, advantages and functions of the present invention, reference may be made to the embodiments shown in the accompanying drawings. The same reference numerals in the accompanying drawings refer to the same components. It should be understood by those skilled in the art that the accompanying drawings are intended to schematically illustrate the preferred embodiments of the present invention and have no limiting effect on the scope of the present invention, and the components in the drawings are not drawn to scale.

[0016] Figure 1 A schematic structural diagram of a testing device for intuitively evaluating a steer-by-wire mechanism according to an embodiment of the utility model is shown;

[0017] Figure 2 An exploded view of a test device for intuitively evaluating a steer-by-wire mechanism according to an embodiment of the utility model is shown;

[0018] Figure 3 A partial schematic diagram of a test device for intuitively evaluating a steer-by-wire mechanism according to an embodiment of the utility model is shown;

[0019] Figure 4 A schematic diagram of a steer-by-wire mechanism of a testing device for intuitively evaluating a steer-by-wire mechanism according to an embodiment of the utility model is shown;

[0020] Figure 5 A schematic diagram of a mechanical steering mechanism of a testing device for intuitively evaluating a steer-by-wire mechanism according to an embodiment of the utility model is shown.

[0021] Description of reference numerals:

[0022] 1. Test bench; 11. First fixing column; 12. First mounting frame; 121. First fixing part; 122. First connecting shaft; 123. First clamp; 124. First connecting piece; 125. First connecting claw; 126. Extending piece; 127. Fixing piece; 13. Second fixing column; 14. Second mounting frame; 141. Second fixing part; 142. Second connecting shaft; 143. Second clamp; 144. Second connecting piece; 145. Second connecting claw; 2 , mechanical steering mechanism; 21, first steering wheel; 22, steering column; 3, wire-controlled steering mechanism to be tested; 31, second steering wheel; 32, angle simulation device; 33, rotation limit structure; 4, electric power steering system; 41, electric power steering body; 42, rack; 421, first gear portion; 422, second gear portion; 43, driving gear; 44, transmission gear; 45, motor; 46, control unit; 5, vehicle load simulation module; 6, universal wheel. DETAILED DESCRIPTION

[0023] The following is a description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, including various details of the embodiments of the present disclosure to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0024] As used herein, the term "including" and its variations mean open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "based at least in part on". The terms "an example embodiment" and "an embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc. may refer to different or the same objects. Other explicit and implicit definitions may also be included below.

[0025] In order to at least partially solve one or more of the above-mentioned problems and other potential problems, an embodiment of the present disclosure proposes a test device for intuitively evaluating a wire-controlled steering mechanism, comprising a test bench 1, a first fixed column 11, a first mounting frame 12, a vehicle load simulation module 5 and a detection unit, and also comprising a second fixed column 13, a second mounting frame 14, a mechanical steering mechanism 2, and an electric power steering system 4; the bottom end of the first fixed column 11 is fixedly connected to the test bench 1, and the first mounting frame 12 is connected to the top of the first fixed column 11, and the first mounting frame 12 is used to install the wire-controlled steering mechanism 3 to be tested; the vehicle load simulation module 5 is fixedly connected to the test bench 1 for simulating the vehicle load; the detection unit includes a plurality of sensors, and the plurality of sensors are connected near the first fixed column 11 for detecting multiple test parameters of the wire-controlled steering mechanism 3 to be tested; the bottom end of the second fixed column 13 is fixedly connected to the test bench 1, and the second mounting frame 1 4 is connected to the top of the second fixed column 13; the mechanical transmission mechanism includes a first steering wheel 21 and a steering column 22, the first steering wheel 21 is fixedly connected to the first end of the steering column 22, and the steering column 22 is mounted on the second mounting frame 14; the electric power steering system 4 is fixed on the test bench 1; the electric power steering system 4 includes an electric power steering body 41, a drive unit, a control unit 46 and a power unit; the electric power steering body 41 is connected to the vehicle load simulation module 5; the drive unit is connected to the second end of the steering column 22; the control unit 46 is connected to the power unit in communication, and the power unit is connected to the drive unit for driving the drive unit to operate; the control unit 46 is used for communicating with the wire control steering mechanism 3 to be tested; during the test, the wire control steering mechanism 3 to be tested sends a signal to the control unit 46, the control unit 46 drives the drive unit to operate through the power unit, and the drive unit drives the first steering wheel 21 to rotate through the steering column 22.

[0026] Specifically, Figures 1 to 5 As shown, the steer-by-wire mechanism 3 to be tested includes a second steering wheel 31, an angle simulation device 32 and a rotation limiting structure 33; the second steering wheel 31 and the angle simulation device 32 are connected via a spline, and the rotation limiting structure 33 and the angle simulation device 32 are connected via a spline.

[0027] The test bench 1 is a frame structure formed by a plurality of cross bars and a plurality of longitudinal bars intersecting and fixedly connected with each other. The test bench 1 is arranged horizontally. Preferably, a plurality of universal wheels 6 are fixedly connected to the bottom surface of the test bench 1 .

[0028] The first fixing column 11 is vertically arranged, and its bottom end is fixedly connected to the test bench 1; the first mounting frame 12 is connected to the top end of the first fixing column 11, and the first mounting frame 12 is used to install the wire-controlled steering mechanism 3 to be tested; specifically, the first mounting frame 12 includes a first fixing portion 121 and a first connecting portion, the first fixing portion 121 is sleeved on the first fixing rod and fixedly connected to the first fixing rod by bolts; the first connecting portion includes a first connecting piece 124 and two first connecting claws 125, the first connecting piece 124 is connected to the side of the outer wall of the first fixing portion 121; the two first connecting claws 125 are respectively fixedly connected to the two ends of the first surface of the first connecting piece 124, and when the wire-controlled steering mechanism 3 to be tested needs to be tested, the two first connecting claws 125 are both in contact with the angle mold The shell of the simulated device 32 is fixedly connected by bolts; preferably, the first mounting frame 12 also includes a first connecting shaft 122 and a first clamp 123; the first connecting shaft 122 is perpendicular to and fixedly connected to the side of the outer wall of the first fixing portion 121; the first clamp 123 is clamped on the first connecting shaft 122, and its side is fixedly connected to the second side of the first connecting plate 124; preferably, the first connecting frame also includes an extension plate 126 and a fixing plate 127, and the extension plate 126 and the fixing plate 127 are both L-shaped, one end of the extension plate 126 is fixedly connected to the second side of the first connecting plate 124, and the other end is fixedly connected to the fixing plate 127, and when the wire-controlled steering mechanism 3 to be tested needs to be tested, the fixing plate 127 is fixedly connected to the shell of the rotation limiting structure 33 by bolts.

[0029] The vehicle load simulation module 5 is fixedly connected to the test bench 1 and is used to simulate the vehicle load. The detection unit includes a plurality of sensors, and the plurality of sensors are connected near the first fixed column 11 and are used to detect a plurality of test parameters of the wire-controlled steering mechanism 3 to be tested. When the wire-controlled steering mechanism 3 to be tested needs to be tested, the plurality of sensors are connected to the wire-controlled steering mechanism 3 to be tested.

[0030] The second fixing column 13 is vertically arranged, and the bottom end of the second fixing column 13 is fixedly connected to the test bench 1. Preferably, the first fixing column 11 and the second fixing column 13 are arranged in parallel along the extension direction of the power steering body; the second mounting frame 14 is connected to the top end of the second fixing column 13, and preferably, the first mounting frame 12 and the second mounting frame 14 are arranged in parallel; the second mounting frame 14 includes a second fixing portion 141 and a second connecting portion; the second fixing portion 141 is sleeved on the second fixing rod and fixedly connected to the second fixing rod by bolts; the second connecting portion includes A second connecting piece 144 and two second connecting claws 145; the second connecting piece 144 is connected to the side of the outer wall of the second fixing portion 141; the two second connecting claws 145 are respectively fixedly connected at the two ends of the first surface of the second connecting piece 144; preferably, the second mounting frame 14 also includes a second connecting shaft 142 and a second clamp 143; the second connecting shaft 142 is perpendicular to and fixedly connected to the side of the outer wall of the second fixing portion 141; the second clamp 143 is clamped on the second connecting shaft 142, and its side is fixedly connected to the second surface of the second connecting piece 144.

[0031] The mechanical transmission mechanism includes a first steering wheel 21 and a steering column 22. The first steering wheel 21 and the first end of the steering column 22 are fixedly connected by a spline. The steering column 22 is installed on the second mounting frame 14. Specifically, the outer shell of the steering column 22 and the two second connecting claws 145 are fixedly connected by bolts; preferably, a steering angle sensor is connected to the steering column 22 for detecting the rotation angle of the mechanical steering mechanism 2.

[0032] The electric power steering system 4 is fixed on the test bench 1; the electric power steering system 4 includes an electric power steering body 41, a drive unit, a control unit 46 and a power unit; the electric power steering body 41 is connected to the vehicle load simulation module 5; the drive unit is connected to the second end of the steering column 22; the control unit 46 is connected to the power unit in communication, and the power unit is connected to the drive unit to drive the drive unit to operate; the control unit 46 is used to communicate with the wire control steering mechanism 3 to be tested; in some embodiments, the drive unit includes a rack 42 and a drive gear 43, and the power unit includes a motor 45 and a transmission gear Wheel 44, rack 42 is slidably connected to the electric power steering body 41 along the extension direction of the electric power steering body 41, the transmission gear 44 and the driving gear 43 are both meshed with the rack 42, preferably, the rack 42 includes a first tooth portion 421 and a second tooth portion 422, the transmission gear 44 and the driving gear 43 are respectively meshed with the first tooth portion 421 and the second tooth portion 422; the driving gear 43 is fixedly connected to the second end of the steering column 22, the transmission gear 44 is fixedly connected to the output shaft of the motor 45, the motor 45 is communicatively connected to the control unit 46, and the control unit 46 is communicatively connected to the angle simulation device 32.

[0033] When the tested wire-controlled steering mechanism 3 needs to be tested, the tested wire-controlled steering mechanism 3 is mounted on the first mounting frame 12, and its angle simulation device 32 is connected to the control unit 46; the second steering wheel 31 is rotated to drive the angle simulation device 32 to rotate, and the angle simulation device 32 sends the angle signal to the control unit 46, and the control unit 46 controls the motor 45 to rotate, and the motor 45 drives the transmission gear 44 to rotate, and the transmission gear 44 drives the rack 42 to move, and the rack 42 drives the drive gear 43 to rotate, and the drive gear 43 drives the first steering wheel 21 to rotate through the steering column 22. By rotating the second steering wheel 31, it is observed whether the first steering wheel 21 rotates accordingly or whether there is a delay, etc., so as to make an intuitive evaluation of the tested wire-controlled steering mechanism 3.

[0034] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the present invention.

Claims

1. A test device for intuitively evaluating a steer-by-wire mechanism, comprising a test bench (1), a first fixing column (11), a first mounting frame (12), a vehicle load simulation module (5) and a detection unit, characterized in that: It also includes a second fixing column (13), a second mounting frame (14), a mechanical steering mechanism (2), and an electric power steering system (4); The bottom end of the first fixing column (11) is fixedly connected to the test bench (1), the first mounting frame (12) is connected to the top end of the first fixing column (11), and the first mounting frame (12) is used to mount the wire control steering mechanism (3) to be tested; The vehicle load simulation module (5) is fixedly connected to the test bench (1) and is used to simulate the vehicle load; The detection unit comprises a plurality of sensors, which are connected near the first fixed column (11) and are used to detect a plurality of test parameters of the wire-controlled steering mechanism (3) to be tested; The bottom end of the second fixing column (13) is fixedly connected to the test bench (1), and the second mounting frame (14) is connected to the top end of the second fixing column (13); The mechanical transmission mechanism comprises a first steering wheel (21) and a steering column (22), the first steering wheel (21) is fixedly connected to a first end of the steering column (22), and the steering column (22) is mounted on a second mounting frame (14); The electric power steering system (4) is fixed on the test bench (1); the electric power steering system (4) comprises an electric power steering body (41), a drive unit, a control unit (46) and a power unit; the electric power steering body (41) is connected to the vehicle load simulation module (5); the drive unit is connected to the second end of the steering column (22); the control unit (46) is connected to the power unit for communication, and the power unit is connected to the drive unit for driving the drive unit to operate; the control unit (46) is used for connecting to the wire control steering mechanism (3) to be tested for communication; During the test, the wire-controlled steering mechanism (3) to be tested sends a signal to the control unit (46), the control unit (46) drives the driving unit to operate via the power-assisting unit, and the driving unit drives the first steering wheel (21) to rotate via the steering column (22).

2. A test device for intuitively evaluating a steer-by-wire mechanism according to claim 1, characterized in that: The driving unit comprises a rack (42) and a driving gear (43), and the power unit comprises a motor (45) and a transmission gear (44); the rack (42) is slidably connected to the electric power steering body (41) along the extension direction of the electric power steering body (41), the transmission gear (44) and the driving gear (43) are both meshed with the rack (42), the driving gear (43) is fixedly connected to the second end of the steering column (22), the transmission gear (44) is fixedly connected to the output shaft of the motor (45), and the motor (45) is communicatively connected to the control unit (46).

3. A test device for intuitively evaluating a steer-by-wire mechanism according to claim 2, characterized in that: The rack (42) comprises a first tooth portion (421) and a second tooth portion (422), and the transmission gear (44) and the driving gear (43) are respectively meshed with the first tooth portion (421) and the second tooth portion (422).

4. A test device for intuitively evaluating a steer-by-wire mechanism according to claim 1, characterized in that: The steering column (22) is connected to a steering angle sensor for detecting the rotation angle of the mechanical steering mechanism (2).

5. A test device for intuitively evaluating a steer-by-wire mechanism according to claim 1, characterized in that: The first fixing column (11) and the second fixing column (13) are arranged in parallel along the extension direction of the dynamic power steering body.

6. A test device for intuitively evaluating a steer-by-wire mechanism according to claim 5, characterized in that: The first mounting frame (12) and the second mounting frame (14) are arranged in parallel, so that the first steering wheel (21) is arranged in parallel with the steering wheel of the wire-controlled steering mechanism (3) to be tested.

7. A test device for intuitively evaluating a steer-by-wire mechanism according to claim 1, characterized in that: The second mounting frame (14) comprises a second fixing portion (141) and a second connecting portion; the second fixing portion (141) is sleeved on the second fixing rod and fixedly connected to the second fixing rod by bolts; the second connecting portion comprises a second connecting piece (144) and two second connecting claws (145); the second connecting piece (144) is connected to the side surface of the outer wall of the second fixing portion (141); the two second connecting claws (145) are respectively fixedly connected to the two ends of the first surface of the second connecting piece (144), and are both fixedly connected to the outer shell of the steering column (22) by bolts.

8. A test device for intuitively evaluating a steer-by-wire mechanism according to claim 7, characterized in that: The second mounting frame (14) further comprises a second connecting shaft (142) and a second clamp (143); the second connecting shaft (142) is perpendicular to and fixedly connected to the side surface of the outer wall of the second fixing portion (141); the second clamp (143) is clamped on the second connecting shaft (142), and its side surface is fixedly connected to the second surface of the second connecting piece (144).

9. A test device for intuitively evaluating a steer-by-wire mechanism according to claim 1, characterized in that: A plurality of universal wheels (6) are fixedly connected to the bottom surface of the test bench (1).

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