A test system and method for an electronic throttle pedal of an excavator

Abstract

The application discloses an excavator electronic throttle pedal testing system and method in the field of engineering machinery testing technology, and aims to solve the problem that the prior art cannot guarantee the coaxiality of the driving motor shaft and the pedal rotary shaft, resulting in additional lateral force and torque in the testing process. It comprises a base, a fixing mechanism for fixing the electronic throttle pedal is arranged on the base, a support is arranged on the base, a rotary loading mechanism and a driving mechanism for driving the rotary loading mechanism to rotate are rotatably connected on the support; the application cooperates with the fixing mechanism through the rotary loading mechanism, ensures the coaxiality of the rotary loading mechanism and the electronic throttle pedal, avoids additional lateral force and torque in the testing process, ensures the accuracy of the testing effect, and cooperates with the static loading mechanism and other mechanisms to meet the testing requirements of different electronic throttle pedals, thereby ensuring the applicability of the application.

Description

Technical Field

[0001] This invention relates to a testing system and method for an excavator's electronic throttle pedal, belonging to the field of engineering machinery testing technology. Background Technology

[0002] The electronic throttle pedal is a critical component of wheeled excavators, and its quality characteristics directly determine the accuracy of the electronic control unit's control over engine fuel levels. Due to inherent errors in sensors, mechanical structures, and assembly processes, performance parameters and durability vary between different pedals, and there is a risk of performance degradation and functional failure after long-term use. Therefore, developing a comprehensive and accurate testing system for electronic throttle pedals is crucial for ensuring product quality and improving the overall machine's driving safety and performance.

[0003] Existing testing technologies mostly use motors to directly drive pedals for simple reciprocating motion, which has a fundamental flaw: it cannot guarantee the coaxiality of the drive motor shaft and the pedal rotation shaft, resulting in additional lateral forces and torques during the test. It is also impossible to accurately establish the correspondence between the pedal output signal (such as voltage) and the actual pedal position (or angle), affecting the actual test results. Furthermore, the testing work is monotonous and cannot meet different testing needs. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a testing system and method for excavator electronic throttle pedals. By cooperating with a rotary loading mechanism and a fixed mechanism, the coaxiality of the rotary loading mechanism and the electronic throttle pedal is ensured, avoiding the generation of additional lateral forces and torques during testing, thus ensuring the accuracy of the test results. Furthermore, the position of the electronic throttle pedal can be adjusted according to actual needs, making it suitable for testing electronic throttle pedals of different sizes. Simultaneously, through the cooperation of mechanisms such as a static loading mechanism, this invention can meet the testing requirements of different electronic throttle pedals, ensuring the applicability of this invention.

[0005] To solve the above-mentioned technical problems, the present invention is implemented using the following technical solution: In a first aspect, the present invention provides an excavator electronic throttle pedal testing system, including a base, a fixing mechanism for fixing the electronic throttle pedal on the base, a bracket on the base, a rotatably connected rotary loading mechanism and a driving mechanism for driving the rotary loading mechanism to rotate on the bracket, the driving mechanism cooperating with the rotary loading mechanism to push the electronic throttle pedal to rotate; A static loading mechanism is detachably connected to the base, which is used to drive the rotary loading mechanism and the electronic throttle pedal to rotate. The fixing mechanism includes a lifting mechanism and a platform. The lifting mechanism is mounted on the base and is used to drive the platform to rise and fall. The platform is provided with a slidably connected clamp and a translation mechanism for driving the clamp to move back and forth. The clamp is detachably connected to the electronic throttle pedal.

[0006] Furthermore, the rotary loading mechanism includes a movable block rotatably connected to the bracket, and a mounting rod is detachably connected inside the movable block. The outer wall of the mounting rod is provided with a push block for pushing the electronic throttle pedal to rotate. The lifting mechanism is a scissor lift, and the translation mechanism includes a vertical plate on the platform and an adjusting bolt rotatably mounted on the vertical plate. The adjusting bolt is threadedly connected to the clamp.

[0007] Furthermore, the static loading mechanism includes a frame that is detachably connected to the base. The outer wall of the frame is provided with a mounting block on one side of the fixing mechanism. A loading bolt is threadedly connected to the inner side of the mounting block, and the loading bolt is located on one side of the rotary loading mechanism.

[0008] Furthermore, it also includes a measuring mechanism, which includes a mechanism for measuring the relative positional error between the rotation center of the rotary loading mechanism and the rotation center of the electronic throttle pedal.

[0009] Furthermore, the rotary loading mechanism also includes an external encoder for calibrating the position of the electronic throttle pedal and a force sensor for measuring the operating force of the electronic throttle pedal.

[0010] Furthermore, it also includes a calibration mechanism, which includes an angle sensor for detecting the angle of the electronic throttle pedal.

[0011] Furthermore, it also includes a controller, wherein the electronic throttle pedal, the external encoder, the force sensor and the drive mechanism are all electrically connected to the controller, and the controller is electrically connected to the display.

[0012] Furthermore, the drive mechanism includes a drive motor and a drive motor encoder.

[0013] In a second aspect, the present invention provides a method for testing the electronic throttle pedal of an excavator, based on the excavator electronic throttle pedal testing system described in the first aspect, comprising: Complete the installation of the base, the fixing mechanism, the rotary loading mechanism, the electronic throttle pedal, and the drive mechanism; Identify the test items and complete the testing work accordingly; the test items include performance testing, durability testing, and static loading testing. If the test item is a performance test, the test work shall be completed according to the test item, specifically including: Step a: Complete the installation of the external encoder and the force sensor; The relative position between the rotation center of the rotary loading mechanism and the rotation center of the electronic throttle pedal is adjusted and verified using the measuring mechanism and the fixing mechanism. The start and end positions of the electronic throttle pedal are obtained by an external encoder; Based on the starting and ending positions of the electronic throttle pedal, the drive mechanism is controlled to drive the rotary loading mechanism to rotate according to a preset angular velocity and a preset number of times, so as to drive the electronic throttle pedal to rotate. The electronic throttle pedal's performance data is acquired through the electronic throttle pedal, the external encoder, and the force sensor, and the operation ends. If the test item is a durability test, the test work shall be completed according to the test item, specifically including: Step b: Complete the installation of the drive motor encoder; The start and end positions of the electronic throttle pedal are obtained through the drive motor encoder; Based on the starting and ending positions of the electronic throttle pedal, the drive mechanism is controlled to drive the rotary loading mechanism to rotate according to a preset angular velocity and a preset number of times, so as to drive the electronic throttle pedal to rotate, and then step a is executed; If the test item is a static loading test, the test work shall be completed according to the test item, specifically including: Step c: Complete the installation of the static loading mechanism and the force sensor; The force sensor acquires the applied force of the electronic throttle pedal in real time. The static loading mechanism is controlled to drive the rotary loading mechanism to rotate, thereby driving the electronic throttle pedal to rotate until the loading force of the electronic throttle pedal reaches the preset loading force; Check the deformation of the electronic throttle pedal, and then proceed to step a.

[0014] Furthermore, the performance data of the electronic throttle pedal includes the operating force, the specific expression of which is as follows: ; In the formula: For the rotary loading mechanism at a rotation angle of Operational force at that time For the rotary loading mechanism at a rotation angle of Force sensors measure force at that time. For the rotary loading mechanism at a rotation angle of No-load capacity at that time.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: 1. This excavator electronic throttle pedal testing system, through the cooperation of a rotary loading mechanism and a fixed mechanism, ensures the coaxiality of the rotary loading mechanism and the electronic throttle pedal, avoiding the generation of additional lateral forces and torques during the test, thus ensuring the accuracy of the test results. Furthermore, the position of the electronic throttle pedal can be adjusted according to actual needs, making it suitable for testing electronic throttle pedals of different sizes. Simultaneously, through the cooperation of mechanisms such as a static loading mechanism, this invention can meet the testing requirements of different electronic throttle pedals, ensuring the applicability of this invention. 2. This excavator electronic throttle pedal testing method is suitable for performance, durability, and static load testing of the electronic throttle pedal. In performance testing, ensuring the coaxiality of the slewing axis of the slewing loading mechanism and the slewing axis of the electronic throttle pedal allows for a more accurate acquisition of the relationship between the electronic throttle pedal output and its slewing position. In durability testing, under standard operating conditions, after repeating the test a specified number of times, it verifies whether the characteristics of the electronic throttle pedal deviate from the specified values ​​and whether its function is lost. In static load testing, the electronic throttle pedal undergoes strength and stiffness tests under static load to verify its strength and stiffness resistance. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of an excavator electronic throttle pedal testing system according to an embodiment of the present invention during static loading testing; Figure 2 This is a three-dimensional structural diagram of an excavator electronic throttle pedal testing system according to an embodiment of the present invention during a durability test. Figure 3 This is a three-dimensional structural diagram of an excavator electronic throttle pedal testing system according to an embodiment of the present invention during performance testing. Figure 4 This is a flowchart illustrating a testing method for an excavator's electronic throttle pedal according to an embodiment of the present invention.

[0017] In the diagram: 1. Drive mechanism; 2. Rotary loading mechanism; 3. Static loading mechanism; 4. Electronic throttle pedal; 5. Fixing mechanism; 6. Base; 7. Platform; 8. Bracket; 9. Lifting mechanism; 10. Clamp; 11. Translation mechanism; 12. Frame; 13. Mounting block; 14. Loading bolt; 15. Movable block; 16. Mounting rod; 17. Push block; 18. Force sensor. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances. Example 1;

[0021] like Figures 1-3 As shown, the present invention provides an excavator electronic throttle pedal testing system, including a base 6, a fixing mechanism 5 for fixing an electronic throttle pedal 4 on the base 6, a bracket 8 on the base 6, a rotary loading mechanism 2 and a drive mechanism 1 for driving the rotary loading mechanism 2 to rotate on the bracket 8, the drive mechanism 1 cooperating with the rotary loading mechanism 2 to push the electronic throttle pedal 4 to rotate; a static loading mechanism 3 is detachably connected to the base 6, the static loading mechanism 3 is used to push the rotary loading mechanism 2 and the electronic throttle pedal 4 to rotate; the fixing mechanism 5 includes a lifting mechanism 9 and a platform 7, the lifting mechanism 9 is disposed on the base 6, the lifting mechanism 9 is used to drive the platform 7 to rise and fall, the platform 7 is provided with a slidably connected clamp 10 and a translation mechanism 11 for driving the clamp 10 to move back and forth, the clamp 10 is detachably connected to the electronic throttle pedal 4.

[0022] Specifically, this invention can be used for performance testing, durability testing, and static loading testing of the electronic throttle pedal 4. First, the position of the clamp 10 is pre-set, and the electronic throttle pedal 4 is fixed to the clamp 10 of the fixing mechanism 5, ensuring that the rotation center of the electronic throttle pedal 4 is parallel to the rotation center of the rotary loading mechanism 2. Then, the height of the platform 7, clamp 10, and electronic throttle pedal 4 is adjusted by the lifting mechanism 9, and the front-to-back position of the clamp 10 and electronic throttle pedal 4 is adjusted by the translation mechanism 11, thereby ensuring that the rotation center of the electronic throttle pedal 4 is parallel to the rotation center of the rotary loading mechanism 2. To ensure coaxiality and avoid coaxiality errors between the two components, the electronic throttle pedal 4 is fixed and adjusted. Optionally, when the electronic throttle pedal 4 is fixed to the clamp 10, small-scale fine adjustments can be made to ensure that the rotation center direction of the electronic throttle pedal 4 meets the working requirements. The electronic throttle pedal 4 and the clamp 10 are detachably connected by bolts and bolt holes on the electronic throttle pedal 4. To meet the above requirements, the size of the bolt holes is slightly larger than the size of the bolts. This invention adjusts the position of the electronic throttle pedal 4 to ensure that the rotation center of the electronic throttle pedal 4 is aligned with the rotation loading mechanism 2. The rotation center is coaxial, ensuring test results and applicable to testing electronic throttle pedals 4 of different sizes. When performance testing is required, the drive mechanism 1 starts working, driving the rotary loading mechanism 2 to move, thereby causing the electronic throttle pedal 4 to reciprocate, acquiring performance parameters of the electronic throttle pedal 4 at different positions, thus completing the performance test. When durability testing is required, the drive mechanism 1 drives the rotary loading mechanism 2 to move, thereby causing the electronic throttle pedal 4 to reciprocate until a preset number of times, and the performance parameters of the electronic throttle pedal 4 at different cycle counts are acquired through performance testing, verifying whether the service life of the electronic throttle pedal 4 meets the technical requirements, thus completing the durability test. This test does not require precise acquisition of the rotation position and operating force of the electronic throttle pedal 4. When static loading testing is required, the static loading mechanism 3 is installed on the base 6, and the static loading mechanism 3 pushes the rotary loading mechanism 2 to rotate, thereby causing the electronic throttle pedal 4 to move until the loading force of the electronic throttle pedal 4 reaches the preset loading force, verifying whether the strength and rigidity of the electronic throttle pedal 4 meet the technical requirements.

[0023] This invention, through the cooperation of the rotary loading mechanism 2 and the fixing mechanism 5, ensures the coaxiality of the rotary loading mechanism 2 and the electronic throttle pedal 4, avoiding the generation of additional lateral forces and torques during the test, ensuring the accuracy of the test results, and allowing the position of the electronic throttle pedal 4 to be adjusted according to actual needs, making it suitable for testing electronic throttle pedals 4 of different sizes; at the same time, through the cooperation of mechanisms such as the static loading mechanism 3, this invention can meet the testing requirements of different electronic throttle pedals 4, ensuring the applicability of this invention.

[0024] In this embodiment, the rotary loading mechanism 2 includes a movable block 15 rotatably connected to the bracket 8. An installation rod 16 is detachably connected inside the movable block 15. The outer wall of the installation rod 16 is provided with a push block 17 for pushing the electronic throttle pedal 4 to rotate. The lifting mechanism 9 is a scissor lift. The translation mechanism 11 includes a vertical plate on the platform 7 and an adjusting bolt rotatably set on the vertical plate. The adjusting bolt is threadedly connected to the clamp 10.

[0025] Specifically, when the rotary loading mechanism 2 pushes the electronic throttle pedal 4 to rotate, it first drives the movable block 15 to rotate around the bracket 8 via the drive mechanism 1. The mounting rod 16 and the push block 17 move with the movable block 15 to push the electronic throttle pedal 4 to rotate. The relative position between the mounting rod 16 and the movable block 15 can be adjusted according to actual working requirements, thereby adjusting the position of the push block 17 to ensure that the push block 17 is located on one side of the electronic throttle pedal 4 for testing purposes. Optionally, the lifting mechanism 9 is a scissor lift used to lift the platform 7. The lifting mechanism 9 can also be a similar structure, such as a cylinder or an electric telescopic rod, used to push the platform 7 to move up and down. When it is necessary to move the clamp 10 back and forth, the adjusting bolt on the vertical plate can be rotated so that the adjusting bolt moves relative to the clamp 10, thereby moving the clamp 10. Optionally, one end of the adjusting bolt is rotatably connected to the clamp 10, and the adjusting bolt is threadedly connected to the vertical plate. When the adjusting bolt is rotated, the adjusting bolt moves relative to the vertical plate, thereby moving the clamp 10. Optionally, the translation mechanism 11 can be a similar structure, such as a cylinder or an electric telescopic rod, used to push the clamp 10 to move.

[0026] In this embodiment, the static loading mechanism 3 includes a frame 12 that is detachably connected to the base 6. The outer wall of the frame 12 is provided with a mounting block 13 on one side of the fixing mechanism 5. The mounting block 13 is threaded with a loading bolt 14 on the inner side. The loading bolt 14 is located on one side of the rotary loading mechanism 2.

[0027] Specifically, the frame 12 is a gantry frame, and the mounting block 13 is detachably connected to the frame 12. During operation, when a static loading test is required, the frame 12 is installed on the base 6, and the relative position of the mounting block 13 and the frame 12 is adjusted so that the mounting block 13 and the loading bolt 14 are located on one side of the push block 17. Then, the loading bolt 14 is rotated, causing the loading bolt 14 and the mounting block 13 to move relative to each other. The loading bolt 14 drives the push block 17, the mounting rod 16 and the movable block 15 to rotate, thereby driving the electronic throttle pedal 4 to rotate, thus realizing the static loading operation.

[0028] In this embodiment, a measuring mechanism is also included, which includes a mechanism for measuring the relative position error between the rotation center of the rotary loading mechanism 2 and the rotation center of the electronic throttle pedal 4, thereby ensuring the test results. Optionally, the measuring mechanism includes, but is not limited to, an optical tracking 3D scanner, which scans the rotation axis of the electronic throttle pedal 4 and the rotation axis of the rotary loading mechanism 2, and uses three-dimensional measurement data evaluation software to determine the relative position error between the rotation center of the electronic throttle pedal 4 and the rotation center of the rotary loading mechanism 2.

[0029] In this embodiment, the rotary loading mechanism 2 includes an external encoder for calibrating the position of the electronic throttle pedal 4 and a force sensor 18 for measuring the operating force of the electronic throttle pedal 4; wherein, the force sensor 18 can replace the push block 17, and the electronic throttle pedal 4 is rotated by the mounting rod 16 and the force sensor 18, which facilitates the measurement of the operating force of the electronic throttle pedal 4.

[0030] In this embodiment, a calibration mechanism is also included. The calibration mechanism includes an inclination sensor for detecting the angle of the electronic throttle pedal 4. Specifically, the inclination sensor can be fixed on the electronic throttle pedal 4 to detect the actual rotation angle of the electronic throttle pedal 4, thereby further ensuring the stability of the test.

[0031] In this embodiment, a controller is also included. The electronic throttle pedal 4, the external encoder, the force sensor 18, and the drive mechanism 1 are all electrically connected to the controller. The controller is electrically connected to a display to facilitate the display of working parameters during testing and ensure the stability of the testing operation. Optionally, the present invention includes a measurement and control system and a host computer. The measurement and control system mainly consists of a lower-level controller and a motor driver, which is responsible for controlling the rotation of the drive mechanism 1, driving the rotary loading mechanism 2 to drive the electronic throttle pedal 4 to achieve reciprocating motion, and simultaneously collecting the output of the electronic throttle pedal 4, the pedal position, and the operating force, and communicating with the host computer in real time to realize control commands. The system includes command reception, test status feedback, and data acquisition and transmission. The host computer mainly consists of an industrial control computer, a display, and host computer software. It is responsible for real-time communication with the slave computer, setting test parameters, sending control commands, receiving test status information, displaying test data of the electronic throttle pedal 4 in real time, parsing the performance test parameters of the electronic throttle pedal 4, and saving the test data. Optionally, the drive mechanism includes a drive motor and a drive motor encoder. Alternatively, the drive mechanism can also be a servo motor or other similar mechanism used to drive the movable block 15 to rotate. The drive motor encoder can calibrate the position of the electronic throttle pedal 4 to facilitate the detection of the electronic throttle pedal 4.

[0032] Specifically, this invention can meet the testing requirements of electronic throttle pedal 4 with different output signals and different rotation center heights. The controller also has a CAN bus interface, an analog current acquisition interface, and an analog voltage acquisition interface, covering the testing requirements of excavator electronic throttle pedal 4 with different output types. The measuring mechanism, calibration mechanism, and fixing mechanism 5 can measure, adjust, and verify the relative position of the rotation center of electronic throttle pedal 4 and the rotation center of rotation loading mechanism 2, covering the testing requirements of excavator electronic throttle pedal 4 with different rotation center heights. Example 2;

[0033] like Figure 4 As shown, the present invention provides a method for testing the electronic throttle pedal of an excavator, based on the excavator electronic throttle pedal testing system described in Embodiment 1, comprising: Complete the installation of the base 6, the fixing mechanism 5, the rotary loading mechanism 2, the electronic throttle pedal 4, and the drive mechanism 1; Identify the test items and complete the testing work accordingly; the test items include performance testing, durability testing, and static loading testing. If the test item is a performance test, the test work shall be completed according to the test item, specifically including: Step a: Complete the installation of the external encoder and the force sensor 18; The relative position between the rotation center of the rotary loading mechanism 2 and the rotation center of the electronic throttle pedal 4 is adjusted and verified by the measuring mechanism (not shown in the figure) and the fixing mechanism 5. The start and end positions of the electronic throttle pedal 4 are obtained by an external encoder; Based on the starting and ending positions of the electronic throttle pedal 4, the drive mechanism 1 is controlled to drive the rotary loading mechanism 2 to rotate according to a preset angular velocity and a preset number of times, so as to drive the electronic throttle pedal 4 to rotate. The performance data of the electronic throttle pedal 4 is obtained through the electronic throttle pedal 4, the external encoder, and the force sensor 18, and the operation ends. If the test item is a durability test, the test work shall be completed according to the test item, specifically including: Step b: Complete the installation of the drive motor encoder; The start and end positions of the electronic throttle pedal 4 are obtained through the drive motor encoder; Based on the starting and ending positions of the electronic throttle pedal 4, the drive mechanism 1 is controlled to drive the rotary loading mechanism 2 to rotate according to a preset angular velocity and a preset number of times, so as to drive the electronic throttle pedal 4 to rotate, and then step a is executed. If the test item is a static loading test, the test work shall be completed according to the test item, specifically including: Step c: Complete the installation of the static loading mechanism 3 and the force sensor 18; The force sensor 18 acquires the loading force of the electronic throttle pedal 4 in real time. The static loading mechanism 3 is controlled to push the rotary loading mechanism 2 to rotate, thereby driving the electronic throttle pedal 4 to rotate until the loading force of the electronic throttle pedal 4 reaches the preset loading force; Check the deformation of the electronic throttle pedal 4, and then proceed to step a.

[0034] In this embodiment, the performance data of the electronic throttle pedal 4 includes the operating force, and the specific expression of the operating force is as follows: ; In the formula: For the rotary loading mechanism 2 at a rotation angle of Operational force at that time For the rotary loading mechanism 2 at a rotation angle of Force sensor 18 measures force. For the rotary loading mechanism 2 at a rotation angle of The no-load force is the force measured by the force sensor 18 when the electronic throttle pedal 4 is not loaded and the rotary loading mechanism rotates without load.

[0035] Specifically, during performance testing, an external encoder is used to calibrate the position of the electronic throttle pedal 4. The electronic throttle pedal 4 is installed at the performance testing station. The tester rotates the rotary loading mechanism 2 to the starting position of the pedal, clicks the calibration button, and obtains the data from the external encoder at the starting position and uploads it to the host computer. Then, the rotary loading mechanism 2 is rotated to the ending position, the calibration button is clicked, and the data from the external encoder at the ending position is obtained and uploaded to the host computer. The drive motor drives the electronic throttle pedal 4 to rotate according to the preset angular velocity and number of cycles. After completing the preset number of cycles, the performance data such as the rotation angle, operating force, repeatability, linearity, and hysteresis of the electronic throttle pedal 4 are automatically extracted.

[0036] During durability testing, the position of the electronic throttle pedal 4 is calibrated using a drive motor encoder. After clicking the calibration button, the data from the drive motor encoder at the starting position is acquired and uploaded to the host computer. Then, the rotary loading mechanism 2 is rotated to the ending position. After clicking the calibration button, the data from the encoder at the drive motor at the ending position is acquired and uploaded to the host computer. The drive motor drives the electronic throttle pedal 4 to rotate according to the preset angular velocity and number of cycles. After completing the preset number of cycles, a performance test is conducted to check whether the performance of the electronic throttle pedal 4 deviates from the specified value and whether its function is lost.

[0037] During static loading tests, adjust the loading direction according to the static loading test items, set the preset loading force, manually adjust the loading bolt 14, and load slowly; after completing the preset loading force, check whether the electronic throttle pedal 4 is deformed or damaged, and conduct performance tests to check whether the performance of the electronic throttle pedal 4 deviates from the specified value and whether the function is lost.

[0038] Specifically, in the performance test, an external encoder is used to calibrate the start and end positions of the electronic throttle pedal 4, and the swing angle of the rotary loading mechanism 2 is directly detected to ensure loading accuracy; in the durability test, a drive motor encoder is used to calibrate the start and end positions of the electronic throttle pedal 4 to ensure working efficiency.

[0039] The method of this invention is applicable to the performance, durability, and static load testing of the electronic throttle pedal 4. In the performance test, ensuring the coaxiality of the rotation axis of the rotary loading mechanism 2 and the rotation axis of the electronic throttle pedal 4 allows for a more accurate acquisition of the relationship between the output of the electronic throttle pedal 4 and its rotational position. In the durability test, under standard operating conditions, after repeating the test a specified number of times, it verifies whether the characteristics of the electronic throttle pedal 4 deviate from the specified values ​​and whether its function is lost. In the static load test, the electronic throttle pedal 4 is subjected to strength and stiffness tests through static loading to verify its strength and stiffness resistance.

[0040] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A testing system for an excavator's electronic throttle pedal, characterized in that, The device includes a base, on which a fixing mechanism for fixing an electronic throttle pedal is provided. The base is provided with a bracket, on which a rotary loading mechanism and a drive mechanism for driving the rotary loading mechanism to rotate are rotatably connected. The drive mechanism cooperates with the rotary loading mechanism to push the electronic throttle pedal to rotate. A static loading mechanism is detachably connected to the base, which is used to drive the rotary loading mechanism and the electronic throttle pedal to rotate. The fixing mechanism includes a lifting mechanism and a platform. The lifting mechanism is mounted on the base and is used to drive the platform to rise and fall. The platform is provided with a slidably connected clamp and a translation mechanism for driving the clamp to move back and forth. The clamp is detachably connected to the electronic throttle pedal.

2. The excavator electronic throttle pedal testing system according to claim 1, characterized in that, The rotary loading mechanism includes a movable block rotatably connected to the bracket, and a mounting rod is detachably connected inside the movable block. The outer wall of the mounting rod is provided with a push block for pushing the electronic throttle pedal to rotate. The lifting mechanism is a scissor lift, and the translation mechanism includes a vertical plate on the platform and an adjusting bolt rotatably mounted on the vertical plate. The adjusting bolt is threadedly connected to the clamp.

3. The excavator electronic throttle pedal testing system according to claim 1, characterized in that, The static loading mechanism includes a frame that is detachably connected to the base. The outer wall of the frame is provided with a mounting block on one side of the fixing mechanism. A loading bolt is threadedly connected to the inner side of the mounting block. The loading bolt is located on one side of the rotary loading mechanism.

4. The excavator electronic throttle pedal testing system according to claim 1, characterized in that, It also includes a measuring mechanism, which includes a mechanism for measuring the relative positional error between the rotation center of the rotary loading mechanism and the rotation center of the electronic throttle pedal.

5. The excavator electronic throttle pedal testing system according to claim 4, characterized in that, The rotary loading mechanism includes an external encoder for calibrating the position of the electronic throttle pedal and a force sensor for measuring the operating force of the electronic throttle pedal.

6. The excavator electronic throttle pedal testing system according to claim 1, characterized in that, It also includes a calibration mechanism, which includes an angle sensor for detecting the angle of the electronic throttle pedal.

7. The excavator electronic throttle pedal testing system according to claim 5, characterized in that, It also includes a controller, wherein the electronic throttle pedal, the external encoder, the force sensor and the drive mechanism are all electrically connected to the controller, and the controller is electrically connected to the display.

8. The excavator electronic throttle pedal testing system according to claim 5, characterized in that, The drive mechanism includes a drive motor and a drive motor encoder.

9. A method for testing the electronic throttle pedal of an excavator, based on the electronic throttle pedal testing system for excavators as described in claim 8, characterized in that, include: Complete the installation of the base, the fixing mechanism, the rotary loading mechanism, the electronic throttle pedal, and the drive mechanism; Identify the test items and complete the testing work accordingly; the test items include performance testing, durability testing, and static loading testing. If the test item is a performance test, the test work shall be completed according to the test item, specifically including: Step a: Complete the installation of the external encoder and the force sensor; The relative position between the rotation center of the rotary loading mechanism and the rotation center of the electronic throttle pedal is adjusted and verified using the measuring mechanism and the fixing mechanism. The start and end positions of the electronic throttle pedal are obtained by an external encoder; Based on the starting and ending positions of the electronic throttle pedal, the drive mechanism is controlled to drive the rotary loading mechanism to rotate according to a preset angular velocity and a preset number of times, so as to drive the electronic throttle pedal to rotate. The electronic throttle pedal's performance data is acquired through the electronic throttle pedal, the external encoder, and the force sensor, and the operation ends. If the test item is a durability test, the test work shall be completed according to the test item, specifically including: Step b: Complete the installation of the drive motor encoder; The start and end positions of the electronic throttle pedal are obtained through the drive motor encoder; Based on the starting and ending positions of the electronic throttle pedal, the drive mechanism is controlled to drive the rotary loading mechanism to rotate according to a preset angular velocity and a preset number of times, so as to drive the electronic throttle pedal to rotate, and then step a is executed; If the test item is a static loading test, the test work shall be completed according to the test item, specifically including: Step c: Complete the installation of the static loading mechanism and the force sensor; The force sensor acquires the applied force of the electronic throttle pedal in real time. The static loading mechanism is controlled to drive the rotary loading mechanism to rotate, thereby driving the electronic throttle pedal to rotate until the loading force of the electronic throttle pedal reaches the preset loading force; Check the deformation of the electronic throttle pedal, and then proceed to step a.

10. The excavator electronic throttle pedal testing method according to claim 9, characterized in that, The performance data of the electronic throttle pedal includes the operating force, and the specific expression of the operating force is as follows: ； In the formula: For the rotary loading mechanism at a rotation angle of Operational force at that time For the rotary loading mechanism at a rotation angle of Force sensors measure force at that time. For the rotary loading mechanism at a rotation angle of No-load capacity at that time.

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