Test bench for stepless speed regulation driver of diesel locomotive
By using a PLC controller and encoder in the continuously variable speed drive test bench, the problems of lack of timing function and servo motor speed dependence on manual estimation in existing continuously variable speed drive test devices are solved, achieving accurate speed measurement and accurate display of test data, and reducing errors.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHUZHOU LOCOMOTIVE DEPOT OF CHINA RAILWAY GUANGZHOU BUREAU GRP CO LTD
- Filing Date
- 2025-06-26
- Publication Date
- 2026-05-08
AI Technical Summary
Existing continuously variable speed drive test equipment lacks timing function, and the servo motor speed relies on manual experience estimation, resulting in large errors.
A PLC controller is used to simulate control signals, combined with data from encoders and stepper motors for processing. The encoder collects data from the stepper motors for calculation, and the results are displayed on a touchscreen. This eliminates the need for manual estimation, improving test accuracy and reducing errors. Similarly, data from the flexible coupling is calculated, and the pulse count is converted into rotational speeds per second and per minute, displayed on the touchscreen. This again eliminates the need for manual estimation, improving test accuracy and reducing errors. The touchscreen allows the operator to stop the test and view key data, further enhancing test accuracy and reducing errors.
This system achieves precise timing and speed measurement for the continuously variable speed drive, reducing errors from manual estimation, improving test accuracy, and minimizing errors. Data from the flexible coupling is calculated and processed to further reduce errors. The processed and calculated data from the flexible coupling is displayed on a touchscreen, improving test accuracy and minimizing errors. Furthermore, the touchscreen allows the tester to stop the test and view key data, thereby improving test accuracy and minimizing errors.
Smart Images
Figure CN224216312U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of continuously variable speed drive test benches, specifically a test bench for continuously variable speed drive systems for internal combustion locomotives. Background Technology
[0002] A continuously variable speed drive (CVT) is a device that enables smooth speed regulation. It achieves stepless adjustment by changing the transmission ratio and transmission form. The main function of a CVT test bench is to test and verify the performance and function of the CVT. By conducting various tests on the test bench, the stability and reliability of the drive in practical applications can be ensured. With the continuous improvement of railway locomotive maintenance quality requirements, the accuracy of test data is increasingly demanding during the maintenance of more and more locomotive parts.
[0003] Currently, existing continuously variable speed drive test devices lack timing functions, and the speed of servo motors is estimated manually based on experience, resulting in significant errors. Therefore, a test bench for continuously variable speed drives in diesel locomotives is proposed to improve the accuracy of key parameter measurement during the testing process of continuously variable speed drives in Dongfeng locomotives. Utility Model Content
[0004] The purpose of this utility model is to provide a test bench for a continuously variable speed drive for internal combustion locomotives, so as to solve the problem mentioned in the background art that the existing continuously variable speed drive test devices do not have a timing function and rely solely on manual experience to estimate the speed of the servo motor, resulting in a large error.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a test bench for a continuously variable speed drive for internal combustion locomotives, comprising a housing, an air inlet on the side of the housing, and a dustproof component fixedly installed on the outside of the air inlet; the housing includes an outer shell, a motor assembly fixedly installed at the front inside the outer shell, a motor assembly fixedly installed on the outer side of the outer shell, an external plug fixedly installed on the side of the outer shell, a PLC controller and a power supply fixedly installed at the bottom inside the outer shell, and a touch screen and an ammeter and voltmeter fixedly installed on the front side of the outer shell; the motor assembly includes a mounting base fixedly installed at the front inside the outer shell, a stepper motor fixedly installed on the rear side of the mounting base, an encoder fixedly installed inside the mounting base, and a flexible coupling fixedly installed between the stepper motor and the encoder.
[0006] Preferably, the external plug is located on the side of the housing away from the air inlet.
[0007] Preferably, a switch connected to a power source is fixedly installed on the front side of the housing.
[0008] Preferably, the dustproof component includes a frame fixedly installed on the side of the housing, the top of the frame is open, a dustproof frame is movably engaged inside the frame, a filter screen is fixedly installed on the inner side of the dustproof frame, guide boxes are fixedly connected to both the front and rear sides of the frame, a clip head is movably engaged inside the guide box, a spring is fixedly connected between the clip head and the guide box, and slots are provided on both the front and rear sides of the dustproof frame, with the clip head movably engaged inside the slot.
[0009] Preferably, the inner side of the card head is arc-shaped, and the card slot is adapted to the card head.
[0010] Preferably, the card frame is located on the outside of the air inlet, and a rubber ring is bonded to the inside of the dustproof frame.
[0011] Preferably, cooling fans are fixedly installed at the rear of the housing, arranged symmetrically on the left and right sides.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] 1. By using a PLC controller, the control signal of the continuously variable speed drive of the test target is simulated, so that the continuously variable speed drive drives the stepper motor to work. At the same time, the data of the stepper motor is collected by the encoder, processed and calculated, and the relevant data results are displayed on the touch screen. This eliminates the need for manual estimation based on experience, improves the accuracy of the test, and reduces errors.
[0014] 2. The spring force keeps the clip head in the slot, fixing the dustproof frame and preventing it from shaking or falling off, ensuring stability. When cleaning or replacing the filter, apply upward force to move the clip head outward, the spring retracts, the clip head separates from the slot, and the dustproof frame can be easily removed for easy maintenance and to reduce dust entering the housing. Attached Figure Description
[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0016] Figure 2 This is a schematic diagram of the internal structure of the housing of this utility model;
[0017] Figure 3 This is a schematic diagram of the structure of the motor assembly of this utility model;
[0018] Figure 4 This is an exploded three-dimensional structural diagram of the dustproof component of this utility model;
[0019] Figure 5 This is a cross-sectional structural diagram of the guide box of this utility model.
[0020] In the diagram: 1. Housing; 11. Outer shell; 12. Motor assembly; 121. Mounting base; 122. Stepper motor; 123. Encoder; 124. Flexible coupling; 13. External plug; 14. PLC controller; 15. Power supply; 16. Touch screen; 17. Ammeter and voltmeter; 2. Air inlet; 3. Dustproof assembly; 31. Frame; 32. Dustproof frame; 33. Filter; 34. Guide box; 35. Clip; 36. Spring; 37. Slot; 4. Cooling fan. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0022] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 This utility model provides a technical solution: a test bench for a continuously variable speed drive for internal combustion locomotives, including a housing 1, an air inlet 2 on the side of the housing 1, and a dustproof component 3 fixedly installed on the outside of the air inlet 2; the housing 1 includes an outer shell 11, a motor assembly 12 fixedly installed at the front inside the outer shell 11, a motor assembly 12 fixedly installed on the outside of the outer shell 11, an external plug 13 fixedly installed on the side of the outer shell 11, a PLC controller 14 and a power supply 15 fixedly installed at the bottom inside the outer shell 11, and a touch screen 16 and an ammeter and voltmeter 17 fixedly installed on the front of the outer shell 11; the motor assembly 12 includes a mounting base 121 fixedly installed at the front inside the outer shell 11, a stepper motor 122 fixedly installed on the rear side of the mounting base 121, and a fixed internal component... An encoder 123 is installed, and a flexible coupling 124 is fixedly installed between the stepper motor 122 and the encoder 123. By operating the touch screen 16, the rotation of the exposed shaft of the stepper motor 122 can be observed to ensure that the speed indication is correct. When the continuously variable speed drive is in the deceleration stage, the maximum deceleration time of the continuously variable speed drive can be accurately obtained through the timer in the PLC, which meets the current requirements for precise measurement and maintenance. The stepper motor 122 is connected to the encoder 123 through the flexible coupling 124. When rotating, the encoder 123 generates pulse signals, which are sent to the PLC controller 14 for processing and calculation of the number of pulses, and converted into speed per second and per minute. The tester can stop the test and view key data through the touch screen 16, thereby improving the accuracy of the test and reducing errors.
[0023] The external plug 13 is located on the side of the housing 11 away from the air inlet 2, which facilitates the connection of the target continuously variable transmission (CVT) drive using test lines. The motor assembly 12 is operated by simulating the target CVT drive. The interface type of the external plug 13 can be customized according to actual needs to meet connection requirements.
[0024] A switch connected to the power supply 15 is fixedly installed on the front side of the outer casing 11 to control the on / off state of the entire test bench, making it convenient for the tester to operate and ensuring the stable operation of the test bench. The entire test bench has a reasonable structural design and is easy to operate, which greatly improves the efficiency and accuracy of the test.
[0025] Please see Figure 4 and Figure 5 The dustproof component 3 includes a frame 31 fixedly installed on the side of the housing 11. The top of the frame 31 is open. A dustproof frame 32 is movably engaged inside the frame 31. A filter 33 is fixedly installed inside the dustproof frame 32. Guide boxes 34 are fixedly connected to both the front and rear sides of the frame 31. A clip head 35 is movably engaged inside the guide box 34. A spring 36 is fixedly connected between the clip head 35 and the guide box 34. Slots 37 are provided on both the front and rear sides of the dustproof frame 32. The clip head 35 is movably engaged inside the slot 37. Through the elastic force of the spring 36, the clip head 35 can... The dustproof frame 32 is securely locked inside the slot 37, thus limiting and fixing it to prevent it from shaking or falling off, ensuring its stability. When the filter 33 needs to be cleaned or replaced, an upward force is applied to move the locking head 35 outward and compress the spring 36 into the guide box 34, separating it from the slot 37 and releasing the locking of the dustproof frame 32. The dustproof frame 32 can then be easily removed from inside the slot 31. The operation is simple and convenient, facilitating the cleaning and maintenance of the filter 33 and effectively reducing the entry of external dust into the housing 11.
[0026] The inner side of the clip 35 is arc-shaped, and the slot 37 is adapted to the clip 35, so that the clip 35 can be inserted into the slot 37 more smoothly, and it is not easy to get stuck or damaged, which improves the stability and durability of the connection. At the same time, when the arc-shaped clip 35 applies upward force, it can squeeze the spring 36 to retract into the guide box 34 and separate from the slot 37, which facilitates the disassembly of the dustproof frame 32 and improves the convenience of maintenance.
[0027] The card frame 31 is installed on the outside of the air inlet 2, and a rubber ring is glued to the inside of the dustproof frame 32. The rubber ring increases the sealing between the dustproof frame 32 and the air inlet 2, effectively preventing external dust from entering the interior of the outer shell 11 through the gaps, and further improving the dustproof effect of the diesel locomotive continuously variable speed drive test bench.
[0028] Please see Figure 2A cooling fan 4 is fixedly installed at the rear of the enclosure 1, arranged symmetrically on the left and right. The cooling fan 4 can dissipate heat inside the enclosure 1 to prevent the driver from being damaged due to excessive temperature inside the enclosure 1.
[0029] Working Principle: Wiring is done via power supply 15, then the test cable connects housing 1 to the stepless speed drive. The switch on the front of housing 11 is then turned on, activating the touchscreen 16 and ammeter / voltmeter 17. The ammeter / voltmeter 17 displays power to ensure the test environment is met. The test is started by operating the touchscreen 16. At this point, ensuring the stepless speed drive is functioning correctly, the test can begin. Different test operation buttons are pressed on the touchscreen 16, and the exposed shaft of encoder 123 at the front of housing 11 rotates, with the speed display showing the correct direction. During the speed increase and hold states of the stepless speed drive, the built-in timer in PLC controller 14 does not operate. During the deceleration state, due to process requirements, the drive needs to stop within a certain time; therefore, the timer starts counting. When encoder 123 stops… The timer displays the deceleration stop time. Simultaneously, when the continuously variable speed drive reaches the designated deceleration time, housing 1 will also stop operating. The stepper motor 122 collects the rotational speed of the encoder 123. The stepper motor 122 is connected to the encoder 123 shaft via a flexible coupling 124. During rotation, it generates pulses, which are input to the PLC controller 14. The PLC controller 14 calculates the number of input pulses per second, converting it to rotational speed per second, and then to rotational speed per minute. The test process can be stopped and the data interface displayed on the touchscreen 16, allowing the operator to easily view key data requirements. This is the entire working process of the device. Any content not described in detail in this manual is existing technology known to those skilled in the art.
[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A test bench for a continuously variable speed drive for an internal combustion locomotive, comprising a housing (1), characterized in that: An air inlet (2) is provided on the side of the box (1), and a dustproof component (3) is fixedly installed on the outside of the air inlet (2); The housing (1) includes an outer shell (11), a motor assembly (12) is fixedly installed at the front inside the outer shell (11), a motor assembly (12) is fixedly installed on the outer side of the outer shell (11), an external plug (13) is fixedly installed on the side of the outer shell (11), a PLC controller (14) and a power supply (15) are fixedly installed at the bottom inside the outer shell (11), and a touch screen (16) and an ammeter and voltmeter (17) are fixedly installed on the front side of the outer shell (11). The motor assembly (12) includes a mounting base (121) fixedly installed inside the front of the housing (11), a stepper motor (122) fixedly installed on the rear side of the mounting base (121), an encoder (123) fixedly installed inside the mounting base (121), and a flexible coupling (124) fixedly installed between the stepper motor (122) and the encoder (123).
2. The test bench for a continuously variable speed drive for an internal combustion locomotive according to claim 1, characterized in that: The external plug (13) is located on the side of the housing (11) away from the air inlet (2).
3. The test bench for a continuously variable speed drive for an internal combustion locomotive according to claim 1, characterized in that: A switch connected to a power supply (15) is fixedly installed on the front side of the housing (11).
4. The test bench for a continuously variable speed drive for an internal combustion locomotive according to claim 1, characterized in that: The dustproof component (3) includes a frame (31) fixedly installed on the side of the outer shell (11). The top of the frame (31) is open. A dustproof frame (32) is movably engaged inside the frame (31). A filter screen (33) is fixedly installed on the inner side of the dustproof frame (32). Guide boxes (34) are fixedly connected to both the front and rear sides of the frame (31). A clip head (35) is movably engaged inside the guide box (34). A spring (36) is fixedly connected between the clip head (35) and the guide box (34). Slots (37) are opened on both the front and rear sides of the dustproof frame (32). The clip head (35) is movably engaged inside the slot (37).
5. The test bench for a continuously variable speed drive for an internal combustion locomotive according to claim 4, characterized in that: The inner side of the card head (35) is arc-shaped, and the card slot (37) is adapted to the card head (35).
6. The test bench for a continuously variable speed drive for an internal combustion locomotive according to claim 5, characterized in that: The card frame (31) is placed on the outside of the air inlet (2), and a rubber ring is glued to the inside of the dustproof frame (32).
7. The test bench for a continuously variable speed drive for an internal combustion locomotive according to claim 5, characterized in that: A cooling fan (4) is fixedly installed symmetrically on the left and right sides inside the rear of the box (1).