A device for testing the hysteresis of excavator working device

Abstract

This utility model discloses a lag testing device for excavator working devices, belonging to the field of excavator testing technology. It includes a handle displacement testing device, a main valve pilot pressure testing device, a working device execution angular velocity testing device, and a host computer. The handle displacement testing device includes a displacement sensor, which is unidirectionally electrically connected to a first microcontroller, a first serial communication module, and the host computer. The main valve pilot pressure testing device includes a pressure sensor, which is unidirectionally electrically connected to a second microcontroller, a second serial communication module, and the host computer. The working device execution angular velocity testing device includes a gyroscope, which is unidirectionally electrically connected to a third microcontroller, a third serial communication module, and the host computer. This utility model can obtain the lag between the working device execution angular velocity and the handle displacement, thereby guiding the troubleshooting of main valve lag and working device execution lag faults.

Description

Technical Field

[0001] This utility model relates to a device for testing the hysteresis of excavator working devices, belonging to the field of excavator testing technology. Background Technology

[0002] Currently, hydraulic control handles are widely used in hydraulic excavators due to their reliability and durability. Movement of the hydraulic control handle causes a change in pilot pressure, which in turn moves the main valve spool, driving the working device to perform corresponding actions. There is a certain lag between the handle movement and the working device's execution; if the delay is too large, it will affect the normal operation of the excavator. There is an urgent need in the existing technology for a device to test the lag of the excavator's working device, thereby guiding the troubleshooting of main valve lag and working device execution lag faults. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a lag test device for excavator working device, which can obtain the lag of the working device's execution angular velocity relative to the handle displacement, thereby guiding the troubleshooting of main valve lag and working device execution lag faults.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A device for testing the hysteresis of an excavator's working device includes a handle displacement testing device, a main valve pilot pressure testing device, a working device execution angular velocity testing device, and a host computer. The handle displacement testing device includes a displacement sensor for acquiring the handle's displacement, and the displacement sensor is unidirectionally electrically connected to a first microcontroller, a first serial communication module, and the host computer. The main valve pilot pressure testing device includes a pressure sensor for acquiring the main valve pilot pressure, and the pressure sensor is unidirectionally electrically connected to a second microcontroller, a second serial communication module, and the host computer. The working device execution angular velocity testing device includes a gyroscope for acquiring the working device's execution angular velocity, and the gyroscope is unidirectionally electrically connected to a third microcontroller, a third serial communication module, and the host computer.

[0006] The handle displacement testing device includes a first control microcontroller operation module, the input and output terminals of which are electrically connected to the host computer and the first microcontroller, respectively.

[0007] The main valve pilot pressure testing device includes a second control microcontroller operating module, the input and output terminals of which are electrically connected to the host computer and the second microcontroller, respectively.

[0008] The working device for performing angular velocity testing includes a third control microcontroller operating module, the input and output terminals of which are electrically connected to the host computer and the third microcontroller, respectively.

[0009] The pressure sensor includes a first pressure sensor and a second pressure sensor. The first pressure sensor is used to collect the pilot pressure of the bucket retraction, and the second pressure sensor is used to collect the pilot pressure of the bucket outward swing.

[0010] The pressure sensor includes a third pressure sensor and a fourth pressure sensor. The third pressure sensor is used to collect the inward pilot pressure of the boom, and the fourth pressure sensor is used to collect the outward pilot pressure of the boom.

[0011] The pressure sensor includes a fifth pressure sensor and a sixth pressure sensor. The fifth pressure sensor is used to collect the boom raising pilot pressure, and the sixth pressure sensor is used to collect the boom lowering pilot pressure.

[0012] The displacement sensor is a pull-wire type displacement sensor, with one end fixed and the other end fixed to the handle.

[0013] The beneficial effects of this utility model are as follows: This utility model provides a test device for the hysteresis of an excavator's working device. It collects the handle displacement through a pull-wire displacement sensor, the pilot pressure of the main valve through a pressure sensor, and the execution angular velocity of the working device through a gyroscope. The hysteresis of the main valve is obtained by the delay between the pilot pressure of the main valve and the handle displacement, and the execution hysteresis of the working device is obtained by the delay between the execution angular velocity of the working device and the pilot pressure of the main valve. In this way, the hysteresis of the execution angular velocity of the working device relative to the handle displacement can be obtained, thereby guiding the troubleshooting of main valve hysteresis and working device execution hysteresis faults. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a test device for the hysteresis of an excavator working device according to the present invention;

[0015] Figure 2 This is a schematic diagram of the test process for a test device for the hysteresis of an excavator working device according to the present invention.

[0016] The reference numerals in the figure are as follows: 1-Handle displacement testing device; 2-Main valve pilot pressure testing device; 3-Working device execution angular velocity testing device; 4-Host computer; 11-Displacement sensor; 12-First microcontroller; 13-First serial communication module; 14-First control microcontroller operation module; 21-First pressure sensor; 22-Second pressure sensor; 23-Third pressure sensor; 24-Fourth pressure sensor; 25-Fifth pressure sensor; 26-Sixth pressure sensor; 27-Second microcontroller; 28-Second serial communication module; 29-Second control microcontroller operation module; 31-Gyroscope; 32-Third microcontroller; 33-Third serial communication module; 34-Third control microcontroller operation module. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solution of the present invention more clearly, and should not be used to limit the protection scope of the present invention.

[0018] Example 1

[0019] like Figure 1 and Figure 2 As shown, this utility model discloses a hysteresis testing device for an excavator's working device, including a handle displacement testing device 1, a main valve pilot pressure testing device 2, a working device execution angular velocity testing device 3, and a host computer 4. The handle displacement testing device 1 includes a displacement sensor 11, which is used to acquire the displacement of the handle. The displacement sensor 11 is unidirectionally electrically connected to a first microcontroller 12, a first serial communication module 13, and the host computer 4. The first microcontroller 12 stores and outputs the digital signal of the handle displacement. The first serial communication module 13 outputs the digital signal of the handle displacement obtained by the first microcontroller 12 to the host computer 4.

[0020] The main valve pilot pressure testing device 2 includes a pressure sensor, which is used to collect the main valve pilot pressure. The pressure sensor is sequentially and unidirectionally electrically connected to the second microcontroller 27, the second serial communication module 28, and the host computer 4. The second microcontroller 27 stores and outputs the digital signal of the main valve pilot pressure. The second serial communication module 28 outputs the digital signal of the main valve pilot pressure obtained by the second microcontroller 27 to the host computer 4.

[0021] The angular velocity testing device 3 for the working device includes a gyroscope 31. The gyroscope 31 is used to collect the angular velocity of the working device, and changes in the angular velocity indicate that the working device is performing its function. The gyroscope 31 is unidirectionally electrically connected to the third microcontroller 32, the third serial communication module 33, and the host computer 4. The third microcontroller 32 stores and outputs the digital signal output by the gyroscope 31. The third serial communication module 33 outputs the digital signal of the working device's angular velocity obtained by the third microcontroller 32 to the host computer 4.

[0022] The host computer 4 receives and processes the collected data on handle displacement, main valve pilot pressure, and working device angular velocity. It obtains the delay data using conventional time alignment methods. Specifically, it plots time on the x-axis and handle displacement, main valve pilot pressure, and working device angular velocity on the y-axis to calculate the delay between the main valve pilot pressure and the handle displacement. The delay between the working device's angular velocity and the main valve's pilot pressure Finally, the time delay between the angular velocity of the working device and the displacement of the handle is obtained. .like If the value is greater than the design value, consider the possibility of a gas leak in the pilot system or a fault in the main valve spool; if If the value exceeds the design value, consider whether the hydraulic circuit is blocked or the hydraulic cylinder is faulty; if If the value exceeds the design value, it will affect the user's operating experience, and in severe cases, it will affect the normal operation of the excavator.

[0023] This invention uses a pull-wire displacement sensor to collect handle displacement, a pressure sensor to collect main valve pilot pressure, and a gyroscope to collect the angular velocity of the working device. The main valve hysteresis is obtained by measuring the delay between the main valve pilot pressure and the handle displacement, and the working device execution hysteresis is obtained by measuring the delay between the working device execution angular velocity and the main valve pilot pressure. The hysteresis of the working device execution angular velocity relative to the handle displacement is then calculated, thereby guiding the troubleshooting of main valve hysteresis and working device execution hysteresis faults.

[0024] Example 2

[0025] like Figure 1 and Figure 2 As shown, this utility model discloses a hysteresis testing device for an excavator's working device, including a handle displacement testing device 1, a main valve pilot pressure testing device 2, a working device execution angular velocity testing device 3, and a host computer 4. The handle displacement testing device 1 includes a displacement sensor 11, which is a pull-wire type displacement sensor. One end of the pull-wire type displacement sensor is fixed, and the other end is fixed to the handle. The displacement sensor 11 is used to acquire the displacement of the handle. The displacement sensor 11 is unidirectionally electrically connected to a first microcontroller 12, a first serial communication module 13, and the host computer 4 in sequence. The first microcontroller 12 stores and outputs the digital signal of the handle displacement. The first serial communication module 13 outputs the digital signal of the handle displacement obtained by the first microcontroller 12 to the host computer 4. The handle displacement testing device 1 includes a first control microcontroller operation module 14, whose input and output terminals are electrically connected to the host computer 4 and the first microcontroller 12, respectively. The host computer 4 runs the first microcontroller 12 through the first control microcontroller running module 14 to perform tests and receive and collect the displacement of the handle.

[0026] The main valve pilot pressure testing device 2 includes a pressure sensor, which is used to collect the main valve pilot pressure. The pressure sensor is sequentially and unidirectionally electrically connected to the second microcontroller 27, the second serial communication module 28, and the host computer 4. The second microcontroller 27 stores and outputs the digital signal of the main valve pilot pressure. The second serial communication module 28 outputs the digital signal of the main valve pilot pressure obtained by the second microcontroller 27 to the host computer 4. In this utility model, it is necessary to collect the digital signals of the pilot pressure of the main valve bucket, stick, and boom. Specifically, the pressure sensor includes a first pressure sensor 21 and a second pressure sensor 22. The first pressure sensor 21 is used to collect the bucket retraction pilot pressure, and the second pressure sensor 22 is used to collect the bucket outward swing pilot pressure. The pressure sensor also includes a third pressure sensor 23 and a fourth pressure sensor 24. The third pressure sensor 23 is used to collect the stick retraction pilot pressure, and the fourth pressure sensor 24 is used to collect the stick outward swing pilot pressure. The pressure sensors include a fifth pressure sensor 25 and a sixth pressure sensor 26. The fifth pressure sensor 25 is used to collect the boom lifting pilot pressure, and the sixth pressure sensor 26 is used to collect the boom lowering pilot pressure. The main valve pilot pressure testing device 2 includes a second control microcontroller operating module 29. The input and output terminals of the second control microcontroller operating module 29 are electrically connected to the host computer 4 and the second microcontroller 27, respectively. The host computer 4 runs the second microcontroller 27 through the second control microcontroller operating module 29 to perform tests and receive the collected main valve pilot pressure. The working device execution angular velocity testing device 3 includes a gyroscope 31. The gyroscope 31 is used to collect the working device execution angular velocity; changes in angular velocity indicate that the working device is executing. The gyroscope 31 is unidirectionally electrically connected to the third microcontroller 32, the third serial communication module 33, and the host computer 4. The third microcontroller 32 stores and outputs the digital signal output by the gyroscope 31. The third serial communication module 33 outputs the digital signal of the working device execution angular velocity obtained by the third microcontroller 32 to the host computer 4. The working device angular velocity testing device 3 includes a third control microcontroller operating module 34. The input and output terminals of the third control microcontroller operating module 34 are electrically connected to the host computer 4 and the third microcontroller 32, respectively. The host computer 4 operates the third microcontroller 32 through the third control microcontroller operating module 34 to perform tests and receive and collect the angular velocity of the working device.

[0027] The above are merely preferred embodiments of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A backhoe implement hysteresis testing device characterized by: The device includes a handle displacement testing device (1), a main valve pilot pressure testing device (2), a working device execution angular velocity testing device (3), and a host computer (4). The handle displacement testing device (1) includes a displacement sensor (11), which is used to acquire the displacement of the handle. The displacement sensor (11) is unidirectionally electrically connected to the first microcontroller (12), the first serial communication module (13), and the host computer (4) in sequence. The main valve pilot pressure testing device (2) includes a pressure sensor, which is used to acquire the main valve pilot pressure. The pressure sensor is unidirectionally electrically connected to the second microcontroller (27), the second serial communication module (28), and the host computer (4) in sequence. The working device execution angular velocity testing device (3) includes a gyroscope (31), which is used to acquire the working device execution angular velocity. The gyroscope (31) is unidirectionally electrically connected to the third microcontroller (32), the third serial communication module (33), and the host computer (4) in sequence.

2. The hysteresis testing device for excavator working device according to claim 1, characterized in that: The handle displacement testing device (1) includes a first control microcontroller operation module (14), the input and output terminals of which are electrically connected to the host computer (4) and the first microcontroller (12), respectively.

3. The hysteresis testing device for excavator working device according to claim 1, characterized in that: The main valve pilot pressure testing device (2) includes a second control microcontroller operating module (29), the input and output terminals of which are electrically connected to the host computer (4) and the second microcontroller (27), respectively.

4. The hysteresis testing device for excavator working device according to claim 1, characterized in that: The working device executes the angular velocity testing device (3), which includes a third control microcontroller operating module (34). The input and output terminals of the third control microcontroller operating module (34) are electrically connected to the host computer (4) and the third microcontroller (32), respectively.

5. The hysteresis testing device for excavator working device according to claim 1, characterized in that: The pressure sensor includes a first pressure sensor (21) and a second pressure sensor (22). The first pressure sensor (21) is used to collect the inward pilot pressure of the bucket, and the second pressure sensor (22) is used to collect the outward pilot pressure of the bucket.

6. The hysteresis testing device for excavator working device according to claim 1, characterized in that: The pressure sensor includes a third pressure sensor (23) and a fourth pressure sensor (24). The third pressure sensor (23) is used to collect the inward pilot pressure of the boom, and the fourth pressure sensor (24) is used to collect the outward pilot pressure of the boom.

7. The hysteresis testing device for excavator working device according to claim 1, characterized in that: The pressure sensor includes a fifth pressure sensor (25) and a sixth pressure sensor (26). The fifth pressure sensor (25) is used to collect the boom lifting pilot pressure, and the sixth pressure sensor (26) is used to collect the boom lowering pilot pressure.

8. The hysteresis testing device for excavator working device according to claim 1, characterized in that: The displacement sensor (11) is a pull-wire displacement sensor, with one end fixed and the other end fixed to the handle.

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