Traction motor terminal pull-out force measurement system

Abstract

This application provides a traction motor terminal pull-out force measurement system, including: a main carrier; a slide; a drive carrier; and a drive assembly including: a lead screw module, including a lead screw and a nut that mates with the lead screw; a stepper motor, driven and connected to the lead screw; a tension sensor including a first end and a second end, the first end being connected to the nut; a tooling assembly including: a first connecting device connected to the second end and used for detachably connecting a terminal head; a second connecting device disposed on the main carrier and used for detachably connecting a terminal seat; a data processing module electrically connected to the tension sensor, configured to determine the maximum tension value based on the detection result of the tension sensor in a corresponding detection cycle; and a display module electrically connected to the data processing module, configured to display the maximum tension value. This traction motor terminal pull-out force measurement system can replace manual measurement of traction motor terminal pull-out force, thus reducing measurement errors.

Description

Technical Field

[0001] This application relates to the field of electric train technology, and in particular to a traction motor terminal pull-out force measurement system. Background Technology

[0002] Traction motor terminals are core components of the power system of electric trains. They consist of a terminal head and a terminal base. The function of the traction motor terminals is to transmit the three-phase frequency conversion pulse voltage output from the traction converter to the traction motor through the insertion of the terminal head into the terminal base, providing forward power to the train. The terminal base has a crown spring to maintain the terminal head in place. The traction motor terminals are detachably connected to their corresponding mounting positions via the terminal base. During train maintenance, the degree of wear of the crown spring in the terminal base is assessed by measuring the pull-out force (insertion and pull-out force) of the traction motor terminals.

[0003] In related technologies, the measurement of traction motor terminal pull-out force mainly relies on manual measurement using a force gauge.

[0004] However, the related technologies suffer from large measurement errors. Summary of the Invention

[0005] This application provides a traction motor terminal pull-out force measurement system to replace manual measurement of traction motor terminal pull-out force, thereby reducing measurement errors.

[0006] This application provides a traction motor terminal pull-out force measurement system, comprising: a main carrier; a slide block slidably connected to the main carrier along a first direction; a drive carrier fixedly connected to the slide block; a drive assembly comprising: a lead screw module including a lead screw and a nut cooperating with the lead screw, the lead screw extending along a second direction and rotatably connected to the drive carrier, the second direction being perpendicular to the first direction, the nut being slidably connected to the drive carrier along the second direction; a stepper motor disposed on the drive carrier and drivenly connected to the lead screw; a tension sensor including a first end and a second end, the first end being connected to the nut; a tooling assembly comprising: a first connecting device connected to the second end and used for detachably connecting a terminal head; a second connecting device disposed on the main carrier and used for detachably connecting a terminal seat; a data processing module electrically connected to the tension sensor, the data processing module being configured to determine a maximum tension value based on the detection result of the tension sensor in a corresponding detection cycle; and a display module electrically connected to the data processing module, the display module being configured to display the maximum tension value.

[0007] In some embodiments, the traction motor terminal pull-out force measurement system further includes: a sub-carrier, the sub-carrier being handheld, the data processing module and the display module being disposed on the sub-carrier; a battery for powering the motor terminal pull-out force measurement system; a stepper motor drive module electrically connected to the stepper motor; a first control key disposed on the sub-carrier and electrically connected to the stepper motor drive module, the stepper motor drive module controlling the stepper motor to rotate forward in response to the first control key being triggered; and a second control key disposed on the sub-carrier and electrically connected to the stepper motor drive module, the stepper motor drive module controlling the stepper motor to rotate in reverse in response to the second control key being triggered.

[0008] In some embodiments, the traction motor terminal pull-out force measurement system further includes a position detection module electrically connected to the stepper motor drive module; the nut includes a first position and a second position, wherein when the nut moves from the first position to the second position, the first connecting device moves toward the terminal block; when the nut moves from the second position to the first position, the first connecting device moves away from the terminal block; the position detection module is used to detect the position of the nut, and the stepper motor drive module is configured to determine whether the nut is in the first position or the second position based on the detection result of the position detection module; when the nut moves from the first position to the second position, the stepper motor drive module controls the stepper motor to stop rotating in response to determining that the nut is in the second position; when the nut moves from the second position to the first position, the stepper motor drive module controls the stepper motor to stop rotating in response to determining that the nut is in the first position.

[0009] In some embodiments, the position detection module includes a first position switch and a second position switch; the first position switch is configured to be triggered when the nut is in a first position; and the second position switch is configured to be triggered when the nut is in a second position.

[0010] In some embodiments, the first connecting device includes a clamp adapted to hold the terminal head.

[0011] In some embodiments, the clamp includes: a first clamping portion; a second clamping portion rotatably connected to the first clamping portion to open and close the clamp; and a fastener detachably connecting the first clamping portion and the second clamping portion.

[0012] In some embodiments, the clamp includes a first clamping portion and a second clamping portion, which are detachably connected by a fastener assembly.

[0013] In some embodiments, the first connecting device further includes a connecting frame, through which the clamp is connected to the second end.

[0014] In some embodiments, the second connecting device includes: a connecting plate fixedly connected to the main carrier; and an elongated hole provided on the connecting plate, the elongated hole having an opening suitable for inserting a bolt radially.

[0015] In some embodiments, the drive assembly further includes: an active synchronous pulley connected to the stepper motor; a driven synchronous pulley connected to the lead screw; and a synchronous belt that engages with both the active and driven synchronous pulleys.

[0016] In some embodiments, the traction motor terminal pull-out force measurement system further includes a pressure sensor, the first end of which is connected to the nut via the pressure sensor; the pressure sensor is electrically connected to the data processing module, and the data processing module is further configured to determine the maximum pressure value in the detection cycle based on the detection result of the pressure sensor; the display module is further configured to display the maximum pressure value.

[0017] In some embodiments, the traction motor terminal pull-out force measurement system further includes a storage module and a communication module. The storage module is electrically connected to the data processing module and is used to store the measurement results of each detection cycle. The communication module is electrically connected to the storage module and is used to transmit the measurement results to external devices.

[0018] The traction motor terminal pull-out force measurement system provided in this application embodiment connects the terminal head to a first connecting device and the terminal seat to a second connecting device. Driven by a stepper motor and transmitted by a lead screw module, the first connecting device moves along a second direction. When the first connecting device moves away from the terminal seat, it pulls the terminal head out of the terminal seat. Simultaneously, the tension sensor in the traction motor terminal pull-out force measurement system detects the tension value in real time. The data processing module determines the maximum tension value based on the sensor's detection results during the detection cycle, and the maximum tension value is finally displayed by the display module. It is understood that by utilizing the precise control advantage of a stepper motor, the moving speed of the first connecting device can be precisely controlled. Compared to manual operation, this allows for more precise and objective control of the pull-out rate, improving the accuracy of the measurement results and reducing measurement errors. Compared to existing technologies, the traction motor terminal pull-out force measurement system provided in this application embodiment offers advantages such as relatively stable terminal head pull-out angle, convenient reading, small error, and low manual labor intensity in measuring traction motor terminal pull-out force.

[0019] The traction motor terminal pull-out force measuring system provided in this application embodiment can adjust the position of the first connecting device in the first direction by moving the slide relative to the main carrier in the first direction, so as to facilitate adjusting the first connecting device to a position that can be connected to the terminal head connected to the terminal block; or, to facilitate aligning the terminal head connected to the first connecting device with the corresponding insertion position, so as to facilitate the measurement of terminal heads at different positions of the terminal block. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0021] Figure 1 This is a schematic diagram of the structure of the traction motor terminal provided in the embodiments of this application;

[0022] Figure 2 A first-view schematic diagram of the first part of the structure of the traction motor terminal pull-out force measurement system provided in the embodiments of this application;

[0023] Figure 3 A schematic diagram of the second part of the traction motor terminal pull-out force measuring system provided in an embodiment of this application;

[0024] Figure 4 A second-view schematic diagram of the first part of the traction motor terminal pull-out force measurement system provided in an embodiment of this application;

[0025] Figure 5 A third-view schematic diagram of the first part of the traction motor terminal pull-out force measurement system provided in an embodiment of this application;

[0026] Figure 6 This is a schematic diagram of the structure of a first connecting device provided in some embodiments of this application;

[0027] Figure 7 A schematic diagram of the structure of the first connecting device provided in some embodiments of this application;

[0028] Figure 8 This is a schematic diagram of a portion of the electrical connection structure of the traction motor terminal pull-out force measurement system provided in an embodiment of this application;

[0029] Figure 9 This is a schematic diagram of another part of the electrical connection structure of the traction motor terminal pull-out force measurement system provided in the embodiments of this application;

[0030] Figure 10 A schematic diagram of the first part of the traction motor terminal pull-out force measuring system provided in the embodiments of this application when the nut is in the first position;

[0031] Figure 11 A schematic diagram of the first part of the traction motor terminal pull-out force measuring system provided in the embodiments of this application when the nut is in the second position;

[0032] Figure 12 Schematic diagrams of various data stream curves for the detection results provided in the embodiments of this application;

[0033] Figure 13 A schematic diagram of the fitted waveform curve of the detection result provided as an example in this application.

[0034] Explanation of reference numerals in the attached figures:

[0035] 10-Traction motor terminal; 11-Terminal head; 12-Terminal base; 13-Plug-in position; 14-Connection hole;

[0036] 100 - Main carrier; 110 - First slide rail;

[0037] 200-slide;

[0038] 300 - Drive carrier; 310 - Connecting part; 320 - First end plate; 330 - Second end plate;

[0039] 400 - Drive assembly; 410 - Leadscrew module; 411 - Leadscrew; 412 - Nut; 412a - First position; 412b - Second position; 420 - Stepper motor; 430 - Driving synchronous pulley; 440 - Driven synchronous pulley; 450 - Synchronous belt;

[0040] 510 - Tension sensor; 511 - First end; 512 - Second end; 520 - Pressure sensor;

[0041] 600-Tooling assembly; 610-First connecting device; 611-Clamp; 6111-First clamping part; 6112-Second clamping part; 6113-Fastener; 612-Fastener assembly; 6121-First bolt; 6122-Second bolt; 613-Connecting frame; 620-Second connecting device; 621-Connecting plate; 622-Elongated hole; 6221-Opening;

[0042] 700 - Sub-carrier; 710 - Data processing module; 720 - Display module; 730 - Battery; 740 - Stepper motor drive module; 750 - First control key; 760 - Second control key; 770 - Third control key; 780 - Speed ​​control module;

[0043] 800 - Position detection module; 810 - First position switch; 820 - Second position switch;

[0044] 910 - Storage module; 920 - Communication module.

[0045] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0046] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0047] Traction motor terminals are core components of the power system of electric trains. They consist of a terminal head and a terminal base. The function of the traction motor terminals is to transmit the three-phase frequency conversion pulse voltage output from the traction converter to the traction motor through the insertion of the terminal head into the terminal base, providing forward power to the train. The terminal base has a crown spring to maintain the terminal head in place. The traction motor terminals are detachably connected to their corresponding mounting positions via the terminal base. During train maintenance, the degree of wear of the crown spring in the terminal base is assessed by measuring the pull-out force (insertion and pull-out force) of the traction motor terminals.

[0048] For example, during long-term operation, trains frequently experience temperature changes and vibration stress, which can easily cause the crown spring structure inside the terminal block to undergo elastic deformation and loosening. This gradually reduces the contact pressure on the terminal head, increases the contact resistance, and ultimately can easily lead to overheating or even burnout of the connector.

[0049] In related technologies, the measurement of traction motor terminal pull-out force mainly relies on manual measurement using a force gauge (such as a pointer-type force gauge).

[0050] However, the related technologies suffer from large measurement errors.

[0051] For example, in manual measurement, differences in the pulling angle and speed of the terminal head by the operator can lead to fluctuations in the measurement results. The same connector may produce significant deviations when measured by different operators.

[0052] For example, during manual measurement, the reading of the dynamometer changes dynamically, making it difficult for a person to record its maximum tension (which usually occurs at the moment the terminal head is pulled out), resulting in inaccurate measurement results.

[0053] The traction motor terminal pull-out force measurement system provided in this application embodiment connects the terminal head to a first connecting device and the terminal seat to a second connecting device. Driven by a stepper motor and transmitted by a lead screw module, the first connecting device moves along a second direction. When the first connecting device moves away from the terminal seat, it pulls the terminal head out of the terminal seat. Simultaneously, the tension sensor in the traction motor terminal pull-out force measurement system detects the tension value in real time. The data processing module determines the maximum tension value based on the sensor's detection results during the detection cycle, and the maximum tension value is finally displayed by the display module. It is understood that by utilizing the precise control advantage of a stepper motor, the moving speed of the first connecting device can be precisely controlled. Compared to manual operation, this allows for more precise and objective control of the pull-out rate, improving the accuracy of the measurement results and reducing measurement errors. Compared to existing technologies, the traction motor terminal pull-out force measurement system provided in this application embodiment offers advantages such as relatively stable terminal head pull-out angle, convenient reading, small error, and low manual labor intensity in measuring traction motor terminal pull-out force.

[0054] The traction motor terminal pull-out force measuring system provided in this application embodiment can adjust the position of the first connecting device in the first direction by moving the slide relative to the main carrier in the first direction, so as to facilitate adjusting the first connecting device to a position that can be connected to the terminal head connected to the terminal block; or, to facilitate aligning the terminal head connected to the first connecting device with the corresponding insertion position, so as to facilitate the measurement of terminal heads at different positions of the terminal block.

[0055] Understandably, the traction motor terminal pull-out force measurement system of this application is used to measure the pull-out force of traction motor terminals.

[0056] Reference Figure 1 As shown, the traction motor terminal 10 includes a terminal head 11 and a terminal base 12. The function of the traction motor terminal 10 is to transmit the three-phase frequency conversion pulse voltage output by the traction converter to the traction motor through the insertion of the terminal head 11 and the terminal base 12, so as to provide forward power for the train.

[0057] For example, the terminal block 12 has a mating position 13 suitable for inserting a terminal head 11.

[0058] The traction motor terminal 10 is detachably connected to a corresponding mounting position via a terminal block 12. For example, the terminal block 12 has a connection hole 14. For example, the connection hole 14 can be a threaded hole, and the terminal block 12 can be fastened to the corresponding mounting position by a bolt that mates with the threaded hole.

[0059] For example, the connection hole 14 can be a light hole, which is suitable for passing through a screw or bolt. The terminal block 12 can be fastened to the corresponding installation position by the screw and the nut that mates with the screw; or, the corresponding installation position has a threaded hole, which mates with a bolt passing through the light hole to fasten the terminal block 12 to the installation position.

[0060] Reference Figure 2 , Figure 4 , Figure 5 , Figure 10 and Figure 11 As shown, a coordinate system is established using three mutually perpendicular coordinate axes in space: the X-axis, Y-axis, and Z-axis. In the following description, the first direction refers to the direction parallel to the X-axis, the second direction refers to the direction parallel to the Y-axis, and the third direction refers to the direction parallel to the Z-axis.

[0061] Reference Figures 2 to 11 As shown, the traction motor terminal pull-out force measurement system provided in this application embodiment may include a main carrier 100, a slide 200, a drive carrier 300, a drive assembly 400, a tension sensor 510, a tooling assembly 600, a data processing module 710, and a display module 720.

[0062] For example, the main carrier 100 can be a frame or a box, etc.

[0063] The slide 200 is slidably connected to the main carrier 100 in a first direction, that is, the slide 200 has the ability to slide in the first direction on the main carrier 100. For example, the main carrier 100 is provided with a first slide rail 110 adapted to cooperate with the slide 200, and the first slide rail 110 can be detachably connected to the main carrier 100 by fasteners.

[0064] The drive carrier 300 is fixedly connected to the slide 200. For example, the drive carrier 300 includes a connecting portion 310 adapted to connect with the slide 200. The connecting portion 310 and the slide 200 can be detachably connected, for example, by a fastener (it should be noted that the position of the fastener should not affect the sliding of the slide 200). Alternatively, the connecting portion 310 and the slide 200 can be welded together.

[0065] The drive assembly 400 may include a lead screw module 410 and a stepper motor 420. The lead screw module 410 includes a lead screw 411 and a nut 412 that mates with the lead screw 411.

[0066] The lead screw 411 extends along a second direction and is rotatably connected to the drive carrier 300. The second direction is perpendicular to the first direction. For example, the drive carrier 300 may include a first end plate 320 and a second end plate 330. Bearings may be provided on both the first end plate 320 and the second end plate 330. The lead screw 411 may pass through the bearings to be rotatably connected via the bearings.

[0067] Nut 412 is slidably connected to drive carrier 300 along a second direction. Exemplarily, nut 412 may include a main body portion adapted to engage with lead screw 411 and a portion adapted to be slidably connected to drive carrier 300; it is understood that at least a portion of drive carrier 300 is adapted to be slidably connected to a corresponding portion of nut 412, for example, such as a guide rail.

[0068] A stepper motor 420 is mounted on a drive carrier 300 and is connected to a lead screw 411 for transmission. In this embodiment, the stepper motor 420 and the lead screw 411 are connected for transmission through a driving synchronous pulley 430, a driven synchronous pulley 440, and a synchronous belt 450.

[0069] For example, in some possible embodiments, the shaft of the stepper motor 420 and the lead screw 411 can be directly connected by a coupling; or, the shaft of the stepper motor 420 and the lead screw 411 can be connected by a transmission component such as a gear.

[0070] The tension sensor 510 includes a first end 511 and a second end 512. The first end 511 is connected to the nut part 412. It should be noted that this connection can be a direct connection between the two or a connection through an intermediate connector.

[0071] The tooling assembly 600 may include a first connecting device 610 and a second connecting device 620. The first connecting device 610 is connected to the second end 512 and is used for detachably connecting the terminal head 11. In this embodiment, the first connecting device 610 includes a clamp for detachably connecting the terminal head 11 during measurement and for easy removal of the terminal head 11 from the first connecting device 610 after measurement. Exemplarily, in some possible implementations, the first connecting device 610 includes a first hole for fitting the terminal head 11, and further includes a threaded hole perpendicular to the first hole and a locking bolt engaging with the threaded hole. The locking bolt, through its engagement with the threaded hole, can press the terminal head 11 against the first hole for detachably connecting the terminal head 11.

[0072] A second connecting device 620 is disposed on the main carrier 100 for detachably connecting the terminal block 12. Exemplarily, the second connecting device 620 may be designed according to the structure of the terminal block 12.

[0073] Understandably, when the nut 412 moves in the second direction, the nut 412 can drive the first connecting device 610 to move in the second direction, so that the first connecting device 610 can move toward or away from the terminal block 12 to which the second connecting device 620 is connected.

[0074] The data processing module 710 is electrically connected to the tension sensor 510, and the data processing module 710 is configured to determine the maximum tension value based on the detection result of the tension sensor 510 in the corresponding detection cycle.

[0075] It should be noted that during one testing cycle, the corresponding terminal head 11 is pulled out from the terminal block 12 to which it is inserted once.

[0076] For example, the data processing module 710 may determine the maximum tensile value based on the detection result of the tension sensor 510 in the corresponding detection cycle by calculating the latest maximum value and comparing the latest data entering the sliding window with historical data.

[0077] For example, the horizontal axis represents time, and the vertical axis represents the value of a data element (e.g., the detection result of tension sensor 510; or the detection result of pressure sensor 520). New data enters from the right, and old data is deleted from the left. When new data enters or old data is deleted, the latest maximum value needs to be calculated. When new data enters, a data element is stored: the current maximum value. When old data is deleted, some data needs to be saved as historical data (larger values ​​are saved, smaller values ​​are deleted). The data stream can be fitted to a waveform curve.

[0078] The following is based on Figure 12 Analyzing various scenarios: a) The data sequence is monotonically increasing; to calculate the maximum value, all data within the sliding window needs to be saved. b) The data sequence is monotonically decreasing; to calculate the maximum value, all data within the sliding window needs to be saved. c) (including c1, c2, and c3): The data sequence forms a peak; to calculate the maximum value, the data between the latest data entering the sliding window and the peak needs to be saved. d) The data sequence forms multiple peaks and troughs; this can be "compressed" into scenario c.

[0079] Any data sequence can be identified first, such as Figure 13 The waveform curve shown calculates the historical data saved by the maximum value: the value is between the maximum value and the latest data. Figure 13 The historical data for calculating the maximum value is stored in segments AB and CD. When there are multiple maximum values, only the latest data needs to be stored.

[0080] The display module 720 is electrically connected to the data processing module 710, and the display module 720 is configured to display the maximum tensile force value.

[0081] The traction motor terminal pull-out force measurement system provided in this application embodiment connects the terminal head 11 to the first connecting device 610 and the terminal seat 12 to the second connecting device 620. Driven by the stepper motor 420 and the lead screw module 410, the first connecting device 610 moves along a second direction. When the first connecting device 610 moves away from the terminal seat 12, it can pull the terminal head 11 out of the terminal seat 12. Simultaneously, the tension sensor 510 in the traction motor terminal pull-out force measurement system can detect the tension value in real time. The data processing module 710 determines the maximum tension value based on the detection result of the tension sensor 510 during the detection cycle, and finally, the display module 720 displays the maximum tension value. It is understood that by utilizing the precise control advantage of the stepper motor 420, the moving speed of the first connecting device 610 can be precisely controlled. Compared to manual operation, this allows for more precise and objective control of the pull-out rate, thereby improving the accuracy of the measurement results and reducing measurement errors. The traction motor terminal pull-out force measurement system provided in this application embodiment has advantages over existing technologies in measuring the pull-out force of traction motor terminals, including relatively stable pull-out angle of the terminal head 11, convenient reading, small error, and low manual labor intensity. The traction motor terminal pull-out force measurement system provided in this application embodiment can adjust the position of the first connecting device 610 in the first direction by moving the slide 200 relative to the main carrier 100 in the first direction. This facilitates adjusting the first connecting device 610 to a position where it can connect to the terminal head 11 connected to the terminal block 12; or, it facilitates aligning the terminal head 11 connected to the first connecting device 610 with the corresponding insertion position 13, thereby facilitating the measurement of terminal heads 11 at different positions on the terminal block 12.

[0082] Reference Figure 2 , Figure 3 , Figure 5 , Figure 8 and Figure 9 As shown, in some embodiments, the traction motor terminal pull-out force measurement system may further include a sub-carrier 700, a battery 730, a stepper motor drive module 740, a first control key 750, and a second control key 760.

[0083] The subcarrier 700 is handheld, and the data processing module 710 and display module 720 are located on the subcarrier 700. The battery 730 powers the motor terminal pull-out force measurement system. Exemplarily, the subcarrier 700 may be box-shaped.

[0084] The stepper motor drive module 740 is electrically connected to the stepper motor 420. For example, the battery 730 and the stepper motor drive module 740 may be located on the sub-carrier 700. It is understood that the stepper motor drive module 740 precisely controls the rotation of the stepper motor 420 by emitting corresponding pulse signals.

[0085] A first control key 750 is located on the sub-carrier 700 and is electrically connected to a stepper motor drive module 740. The stepper motor drive module 740 controls the stepper motor 420 to rotate forward when the first control key 750 is triggered. For example, the first control key 750 can be of the type that is "triggered when pressed and in an untriggered state when released (unpressed)".

[0086] For example, the trigger at the point where "the stepper motor drive module 740 controls the stepper motor 420 to rotate forward in response to the first control key 750 being triggered" can be a point touch. When the trigger is a point touch, the stepper motor 420 can be stopped by setting the third control key 770; or, the position of the nut 412 can be determined by setting the position detection module 800 so that the stepper motor 420 can be stopped when the nut 412 is in the corresponding position.

[0087] The first control key 750 can be a physical key or a virtual key formed on, for example, a touchscreen. It should be noted that when the stepper motor 420 rotates forward, the first connecting device 610 moves toward the terminal block 12.

[0088] The second control key 760 is located on the sub-carrier 700 and is electrically connected to the stepper motor drive module 740. The stepper motor drive module 740 controls the stepper motor 420 to reverse when the second control key 760 is triggered. For example, the second control key 760 can be of the type that is "triggered when pressed and in an untriggered state when released (unpressed)".

[0089] For example, the trigger at the point where "the stepper motor drive module 740 controls the stepper motor 420 to reverse in response to the second control key 760 being triggered" can be a point touch. When the trigger is a point touch, the stepper motor 420 can be stopped by setting the third control key 770; or, the position of the nut 412 can be determined by setting the position detection module 800 so that the stepper motor 420 can be stopped when the nut 412 is in the corresponding position.

[0090] The second control key 760 can be a physical key or a virtual key formed on, for example, a touchscreen. It should be noted that when the stepper motor 420 reverses, the first connecting device 610 moves away from the terminal block.

[0091] In this embodiment, by setting a handheld subcarrier 700, and setting the data processing module 710, display module 720, first control key 750 and second control key 760 on the subcarrier 700, it is convenient for the measuring personnel to hold the subcarrier 700 to perform measurement control and reading work, which helps to further improve the convenience of measurement work.

[0092] Understandably, before measuring the pull-out force of the motor terminal, the terminal head 11 is connected to the terminal block 12. Before connecting the terminal head 11, the operator can control the stepper motor 420 to rotate forward by triggering the first control key 750, thereby moving the first connecting device 610 toward the terminal block 12 to a position where the terminal head 11 can be connected. After the connection between the first connecting device 610 and the terminal head 11 is in place, the operator can control the stepper motor 420 to rotate backward by triggering the second control key 760, thereby moving the first connecting device 610 away from the terminal block 12 to pull out the terminal head 11.

[0093] For example, the traction motor terminal pull-out force measurement system may further include a speed control module 780, which is electrically connected to the stepper motor drive module 740. The speed control module 780 is used to adjust the rotational speed of the stepper motor 420 to adjust the speed at which the nut 412 moves in the second direction, thereby adjusting the speed at which the first connecting device 610 moves in the second direction. The speed control module 780 may have buttons for human-machine interaction to adjust the rotational speed of the stepper motor 420. Accordingly, the speed control module 780 may have a display screen to display the current rotational speed of the stepper motor 420.

[0094] It should be noted that the rotation speed of the stepper motor 420 can be flexibly set according to requirements, with the principle of setting it to facilitate accurate measurement.

[0095] Reference Figure 2 , Figure 5 , Figure 9 , Figure 10 and Figure 11 As shown, in some embodiments, the traction motor terminal pull-out force measurement system further includes a position detection module 800, which is electrically connected to the stepper motor drive module 740.

[0096] It should be noted that the nut 412 includes a first position 412a and a second position 412b. When the nut 412 moves from the first position 412a to the second position 412b, the first connecting device 610 moves toward the terminal block 12; when the nut 412 moves from the second position 412b to the first position 412a, the first connecting device 610 moves away from the terminal block 12.

[0097] The position detection module 800 is used to detect the position of the nut 412, and the stepper motor drive module 740 is configured to determine whether the nut 412 is in the first position 412a or the second position 412b based on the detection result of the position detection module 800.

[0098] When the nut 412 moves from the first position 412a to the second position 412b, the stepper motor drive module 740 controls the stepper motor 420 to stop rotating in response to determining that the nut 412 is in the second position 412b.

[0099] When the nut 412 moves from the second position 412b to the first position 412a, the stepper motor drive module 740 controls the stepper motor 420 to stop rotating in response to determining that the nut 412 is in the first position 412a.

[0100] In this embodiment, during the process of the stepper motor 420 driving the nut 412 to move along the second direction, the stepper motor drive module 740 and the position detection module 800 can automatically stop the stepper motor 420 when the nut 412 reaches the first position 412a or the second position 412b, so as to automatically stop the nut 412 in the appropriate position.

[0101] It should be noted that when the nut 412 is in the first position 412a, the first connecting device 610 is in a position where the terminal head 11 to which it is connected has been pulled out of the terminal block 12; when the nut 412 is in the second position 412b, the first connecting device 610 is in a position suitable for connecting the terminal head 11 inserted into the terminal block 12.

[0102] In this embodiment, the position detection module 800 includes two position switches: a first position switch 810 and a second position switch 820. The first position switch 810 is configured to be triggered when the nut 412 is in the first position 412a; the second position switch 820 is configured to be triggered when the nut 412 is in the second position 412b.

[0103] For example, in some possible implementations, the position detection module 800 may include an encoder for detecting the angular displacement of the stepper motor 420 or the lead screw 411. The stepper motor drive module 740 may indirectly determine the position of the nut 412 by calculation based on the detection result of the encoder. It is understood that the stepper motor drive module 740 includes a submodule for calculation.

[0104] For example, taking the position of the nut 412 and the change in the detection result of the tension sensor 510 as a reference, in one of the aforementioned "detection cycles": the nut 412 is in the first position 412a, the nut 412 moves to the second position 412b (if it is necessary to measure the pull force of the terminal head 11 relative to the terminal seat 12, the terminal head 11 can be connected to the first connecting device 610 when the nut 412 is in this position), the nut 412 moves back to the first position 412 to pull the terminal head 11 off the terminal seat 12 (in this process, the detection result of the tension sensor 510 goes from small to large and then back to small).

[0105] Reference Figure 2 , Figure 5 , Figure 9 , Figure 10 and Figure 11 As shown, in some embodiments, the position detection module 800 includes a first position switch 810 and a second position switch 820. The first position switch 810 is configured to be triggered when the nut 412 is in a first position 412a; the second position switch 820 is configured to be triggered when the nut 412 is in a second position 412b.

[0106] In this embodiment, the triggering status of the first position switch 810 and the second position switch 820 can directly provide feedback on whether the nut 412 is in the first position 412a or the second position 412b. Compared to an encoder, this reduces the difficulty of control.

[0107] For example, the first position switch 810 and the second position switch 820 are contact-type, meaning that triggering the first position switch 810 and the second position switch 820 requires contact with the object being measured or a related extension of the object being measured. The nut 412 may be provided with protrusions suitable for contacting the first position switch 810 and the second position switch 820. The first position switch 810 and the second position switch 820 are fixed on the drive carrier 300, and the first position switch 810 and the second position switch 820 are arranged along a second direction.

[0108] For example, in some possible embodiments, the first position switch 810 and the second position switch 820 can be non-contact type position switches, such as photoelectric switches or electromagnetic switches.

[0109] Reference Figure 2 , Figure 5 , Figure 6 and Figure 7As shown, in some embodiments, the first connecting device 610 includes a clamp 611 adapted to hold the connecting terminal head 11. In this embodiment, the clamping and releasing of the clamp 611 facilitates the disassembly of the terminal head 11, and the clamping action of the clamp 611 enables reliable connection of the terminal head 11 during the pulling process.

[0110] In this embodiment, the clamp 611 clamps or releases the terminal head 11 by attaching or detaching the corresponding fasteners. In some possible embodiments, the clamp 611 can be a pneumatic clamp, a hydraulic clamp, or an electric clamp to further improve the convenience of clamping or releasing the corresponding terminal head 11.

[0111] Reference Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, the clamp 611 may include a first clamping portion 6111, a second clamping portion 6112, and a fastener 6113. The second clamping portion 6112 is rotatably connected to the first clamping portion 6111 to open and close the clamp 611. The fastener 6113 is detachably connected to the first clamping portion 6111 and the second clamping portion 6112.

[0112] In this embodiment, after the fastener 6113 is removed from between the first clamping part 6111 and the second clamping part 6112, the second clamping part 6112 can be rotated relative to the first clamping part 6111 to open the clamping port of the clamp 611, so as to facilitate placing the terminal head 11 in the clamping port or to facilitate removing the terminal head 11 from the clamping port, thereby facilitating the assembly and disassembly of the terminal head 11.

[0113] For example, the second clamping part 6112 has a pivot shaft, and the first connecting device 610 may include a connecting frame 613. The connecting frame 613 has a hole suitable for rotatably connecting the pivot shaft, and the pivot shaft indirectly rotatably connects the second clamping part 6112 and the first clamping part 6111 by cooperating with the hole.

[0114] For example, the fastener 6113 is a bolt, the second clamping portion 6112 has a hole suitable for the bolt to pass through, and the first clamping portion 6111 has a threaded hole that mates with the bolt passing through the second clamping portion 6112, thereby detachably connecting the first clamping portion 6111 and the second clamping portion 6112. It is understood that when the fastener 6113 is connected between the first clamping portion 6111 and the second clamping portion 6112, the clamping opening of the clamp 611 is in a closed state; after the fastener 6113 is removed from between the first clamping portion 6111 and the second clamping portion 6112, the clamping opening of the clamp 611 is in a state that can be opened.

[0115] Reference Figure 7As shown, in some embodiments, the clamp 611 may include a first clamping part 6111 and a second clamping part 6112, which are detachably connected by a fastener assembly 612.

[0116] In this embodiment, by disassembling the fastener assembly 612, the second clamping part 6112 can be completely removed from the first clamping part 6111, so as to fully open the clamp 611 and further facilitate the disassembly and assembly of the terminal head 11; and the fastening force of the fastener assembly 612 can enable the clamp 611 to generate a large clamping force on the terminal head 11.

[0117] For example, the fastener assembly 612 includes a first bolt 6121 and a second bolt 6122. A second clamping portion 6112 has a first hole adapted to accommodate the first bolt 6121, and the first clamping portion 6111 has a threaded hole that aligns with the first hole and engages with the first bolt 6121. Similarly, the second clamping portion 6112 has a second hole adapted to accommodate the second bolt 6122, and the first clamping portion 6111 has a threaded hole that aligns with the second hole and engages with the second bolt 6122. Thus, the first clamping portion 6111 and the second clamping portion 6112 are detachably connected by the engagement of the first bolt 6121 in the first hole with its corresponding threaded hole, and by the engagement of the second bolt 6122 in the second hole with its corresponding threaded hole.

[0118] Reference Figure 2 , Figure 5 and Figure 6 As shown, in some embodiments, the first connecting device 610 further includes a connecting frame 613, through which the clamp 611 is connected to the second end 512. It should be noted that the connection between the connecting frame 613 and the second end 512 is suitable for the stable transmission of tensile and compressive forces.

[0119] In this embodiment, the clamp 611 can extend a certain distance from the tension sensor 510 along the second direction through the connecting frame 613 to adapt to the length characteristics of the terminal head 11.

[0120] For example, the connecting bracket 613 has a hole for a through bolt, which is threaded to the second end 512. The bolt and the tension sensor 510 can limit the connecting bracket 613 in the second direction to prevent the connecting bracket 613 from falling off the tension sensor 510.

[0121] For example, the connecting bracket 613 is tractably disposed relative to the tension sensor 510 to facilitate adjustment of the orientation of the first clamping part 6111 or the second clamping part 6112 after opening, so as to facilitate the disassembly and assembly of the terminal head 11.

[0122] Reference Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, in some embodiments, the second connecting device 620 may include a connecting plate 621 and an elongated hole 622. The connecting plate 621 is fixedly connected to the main carrier 100. The elongated hole 622 is provided on the connecting plate 621, and the elongated hole 622 has an opening 6221 suitable for inserting a bolt radially.

[0123] In this embodiment, by providing a connecting plate 621 and an elongated hole 622, and providing an opening 6221 at the corresponding position of the elongated hole 622, it is convenient to install and remove the terminal block 12 by means of bolts.

[0124] For example, the connecting plate 621 and the main carrier 100 can be connected by welding.

[0125] For example, the terminal block 12 has a connection hole 14, which is a threaded hole. Fasteners pass through the corresponding elongated hole 622 and engage with the threaded hole to fasten the terminal block 12.

[0126] Reference Figure 2 , Figure 4 and Figure 5 As shown, in some embodiments, the drive assembly 400 may further include a driving synchronous pulley 430, a driven synchronous pulley 440, and a synchronous belt 450. The driving synchronous pulley 430 is connected to the stepper motor 420. The driven synchronous pulley 440 is connected to the lead screw 411. The synchronous belt 450 engages with both the driving synchronous pulley 430 and the driven synchronous pulley 440.

[0127] In this embodiment, the active synchronous pulley 430, the driven synchronous pulley 440 and the synchronous belt 450 can form an accurate transmission, so as to accurately control the position of the nut 412 by the action of the stepper motor 420.

[0128] For example, in this embodiment, the timing belt 450 is tensioned by adjusting the distance between the active timing pulley 430 and the driven timing pulley 440 to prevent the timing belt 450 from slipping during transmission.

[0129] Alternatively, in some possible embodiments, the timing belt 450 can be tensioned by additionally setting a tensioning pulley.

[0130] Reference Figure 2 , Figure 5 and Figure 8As shown, in some embodiments, the traction motor terminal pull-out force measurement system may further include a pressure sensor 520, with the first end 511 connected to the nut 412 via the pressure sensor 520. The pressure sensor 520 is electrically connected to the data processing module 710. The data processing module 710 is also configured to determine the maximum pressure value during the detection cycle based on the detection result of the pressure sensor 520. The display module 720 is also configured to display the maximum pressure value.

[0131] For example, the pressure sensor 520 can have an accuracy of 0.01N or even higher.

[0132] In this embodiment, the traction motor terminal pull-out force measurement system can measure both the pulling force of the terminal head 11 being pulled off the terminal seat 12 and the pressing force of the terminal head 11 being just inserted into the terminal seat 12 during a test cycle.

[0133] For example, the display module 720 may include two display areas, one for displaying the maximum tensile force value and the other for displaying the maximum compressive force value. Both display areas may be LED displays.

[0134] For example, the method for determining the maximum pressure value can refer to the method for determining the maximum tension value described above, as the principles of the two are similar.

[0135] For example, taking one test cycle as an example, first adjust the nut 412 to the first position 412a; then connect the terminal head 11 (in the state of not being inserted into the terminal block 12) to the first connecting device 610 (a reference position can be marked on the terminal head 11 to determine the relative position of the terminal head 11 and the first connecting device 610 according to the reference position); then, adjust the position of the slide 200 in the first direction to align the terminal head 11 with the corresponding insertion position 13; then, adjust the nut 412 to the second position 412b (it should be noted that, through the above-mentioned "determining the relative position of the terminal head 11 and the first connecting device 610 according to the reference position"), the terminal head 11 is aligned with the corresponding insertion position 13. The relative position of 610 is adjusted so that when the nut 412 is in the second position 412b, the terminal head 11 is just inserted into the terminal block 12. During the above process, the data processing module 710 determines the maximum pressure value in the detection cycle based on the detection result of the pressure sensor 520, and the maximum pressure value is displayed by the display module 720. Then, the nut 412 is adjusted back to the first position 412a to pull the terminal head 11 off the terminal block 12. During this process, the data processing module 710 determines the maximum tension value based on the detection result of the tension sensor 510, and the display module 720 displays the maximum tension value.

[0136] For example, the detection accuracy of the tension sensor 510 can be 0.01N or even higher.

[0137] For example, the slide 200 may be equipped with a locking device. After the slide 200 is adjusted to the target position along the first direction, the locking device can be used to lock the slide 200 in the target position (e.g., lock it to the main carrier 100 or the first slide rail 110). In this way, during the corresponding pulling or plugging action of the traction motor terminal pull-out force measurement system, the position of the slide 200 can be stabilized, which helps to further improve the accuracy of the measurement results. Understandably, when it is necessary to adjust the position of the slide 200 again along the first direction, the locking device releases the lock to the target position.

[0138] For example, the display content of the above-mentioned display module 720 can be reset to zero when a new detection cycle begins. Alternatively, the traction motor terminal pull-out force measurement system has a reset button, and the above-mentioned display content can be cleared by operating the reset component.

[0139] For example, the traction motor terminal pull-out force measurement system may have a storage module 910, which can be configured to store measurement results for multiple testing cycles. The traction motor terminal pull-out force measurement system may also have a button for retrieving the stored measurement results, which can be accessed via the display module 720 by operating the button.

[0140] Reference Figure 3 and Figure 8 As shown, in some embodiments, the traction motor terminal pull-out force measurement system may further include a storage module 910 and a communication module 920. The storage module 910 is electrically connected to the data processing module 710 and is used to store the measurement results of each detection cycle. The communication module 920 is electrically connected to the storage module 910 and is used to transmit the measurement results externally.

[0141] For example, the communication module 920 may include a Bluetooth transmission submodule and a USB transmission submodule.

[0142] For example, the communication module 920 may be located on the subcarrier 700.

[0143] For example, the traction motor terminal pull-out force measurement system can communicate with a computer or other backend system through the aforementioned communication module 920 to perform systematic data storage or data analysis through the computer system.

[0144] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A traction motor terminal pull force measurement system, characterized by, include: Main carrier (100); A slide (200) is slidably connected to the main carrier (100) along a first direction; The drive carrier (300) is fixedly connected to the slide (200); The driver component (400) includes: A lead screw module (410) includes a lead screw (411) and a nut (412) that mates with the lead screw (411). The lead screw (411) extends along a second direction and is rotatably connected to the drive carrier (300). The second direction is perpendicular to the first direction. The nut (412) is slidably connected to the drive carrier (300) along the second direction. A stepper motor (420) is mounted on the drive carrier (300) and is connected to the lead screw (411) for transmission. The tension sensor (510) includes a first end (511) and a second end (512), wherein the first end (511) is connected to the nut (412); Tooling assembly (600), including: The first connecting device (610) is connected to the second end (512) and is used to detachably connect the terminal head (11). A second connecting device (620) is provided on the main carrier (100) for detachably connecting the terminal block (12). A data processing module (710) is electrically connected to the tension sensor (510), and the data processing module (710) is configured to determine the maximum tension value based on the detection result of the tension sensor (510) in the corresponding detection cycle; The display module (720) is electrically connected to the data processing module (710) and is configured to display the maximum tensile force value.

2. The traction motor terminal pull force measurement system of claim 1, wherein, Also includes: Subcarrier (700), the subcarrier (700) is handheld, and the data processing module (710) and the display module (720) are disposed on the subcarrier (700). Battery (730) is used to power the motor terminal pull-out force measuring system; A stepper motor drive module (740) is electrically connected to the stepper motor (420); A first control key (750) is located on the sub-carrier (700) and electrically connected to the stepper motor drive module (740). The stepper motor drive module (740) controls the stepper motor (420) to rotate forward when the first control key (750) is triggered. A second control key (760) is located on the sub-carrier (700) and electrically connected to the stepper motor drive module (740). The stepper motor drive module (740) controls the stepper motor (420) to reverse when the second control key (760) is triggered.

3. The traction motor terminal pull force measurement system of claim 2, wherein, It also includes a position detection module (800), which is electrically connected to the stepper motor drive module (740); The nut (412) includes a first position (412a) and a second position (412b). When the nut (412) moves from the first position (412a) to the second position (412b), the first connecting device (610) moves toward the terminal block (12); when the nut (412) moves from the second position (412b) to the first position (412a), the first connecting device (610) moves away from the terminal block (12). The position detection module (800) is used to detect the position of the nut (412), and the stepper motor drive module (740) is configured to determine whether the nut (412) is in the first position (412a) or the second position (412b) based on the detection result of the position detection module (800). When the nut (412) moves from the first position (412a) to the second position (412b), the stepper motor drive module (740) controls the stepper motor (420) to stop rotating when it determines that the nut (412) is in the second position (412b); When the nut (412) moves from the second position (412b) to the first position (412a), the stepper motor drive module (740) controls the stepper motor (420) to stop rotating in response to determining that the nut (412) is in the first position (412a).

4. The traction motor terminal pull-out force measuring system according to claim 3, characterized in that, The position detection module (800) includes a first position switch (810) and a second position switch (820); The first position switch (810) is configured to be triggered when the nut (412) is in the first position (412a); The second position switch (820) is configured to be triggered when the nut (412) is in the second position (412b).

5. The traction motor terminal pull-out force measuring system according to claim 1, characterized in that, The first connecting device (610) includes a clamp (611) adapted to hold and connect the terminal head (11).

6. The traction motor terminal pull-out force measuring system according to claim 5, characterized in that, The clamp (611) includes: First clamping part (6111); The second clamping part (6112) is rotatably connected to the first clamping part (6111) to open and close the clamp (611). Fastener (6113) is detachably connected to the first clamping part (6111) and the second clamping part (6112).

7. The traction motor terminal pull-out force measuring system according to claim 5, characterized in that, The clamp (611) includes a first clamping part (6111) and a second clamping part (6112), which are detachably connected by a fastener assembly (612).

8. The traction motor terminal pull-out force measuring system according to claim 5, characterized in that, The first connecting device (610) further includes a connecting frame (613), and the clamp (611) is connected to the second end (512) through the connecting frame (613).

9. The traction motor terminal pull-out force measuring system according to claim 1, characterized in that, The second connecting device (620) includes: A connecting plate (621) is fixedly connected to the main carrier (100); An elongated hole (622) is provided on the connecting plate (621), the elongated hole (622) having an opening (6221) suitable for inserting a bolt radially.

10. The traction motor terminal pull-out force measuring system according to claim 1, characterized in that, The drive component (400) also includes: An active synchronous pulley (430) is connected to the stepper motor (420); Driven synchronous pulley (440) is connected to the lead screw (411); The timing belt (450) is engaged with the driving timing pulley (430) and the driven timing pulley (440), respectively.

11. The traction motor terminal pull-out force measuring system according to any one of claims 1 to 10, characterized in that, It also includes a pressure sensor (520), the first end (511) being connected to the nut (412) via the pressure sensor (520); the pressure sensor (520) is electrically connected to the data processing module (710), the data processing module (710) being further configured to determine the maximum pressure value in the detection cycle based on the detection result of the pressure sensor (520); the display module (720) is further configured to display the maximum pressure value.

12. The traction motor terminal pull-out force measuring system according to claim 11, characterized in that, It also includes a storage module (910) and a communication module (920). The storage module (910) is electrically connected to the data processing module (710) and is used to store the measurement results of each detection cycle. The communication module (920) is electrically connected to the storage module (910) and is used to transmit the measurement results to the outside world.

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