A motor train unit motor suspension plate spring automatic measuring device and method

Abstract

The application discloses a kind of motor train unit motor hanger plate spring automatic measuring equipment and method, equipment includes: installation base, including being arranged in the support frame of bottom and being arranged on the support plate of support frame;Clamping device, including being arranged on the plate spring mounting bracket of support plate, installation reference pin being arranged in the center of plate spring mounting bracket and being arranged in the tight swing arm cylinder of plate spring mounting bracket side face;Support device, including support cylinder and being arranged on the support profiled block of support cylinder piston;Measuring device, including telescopic component, being arranged on the lower pressing component of telescopic component and being arranged on the measuring sensor of lower pressing component;Laser marking device, including marking lifting platform and being arranged on the laser marking machine of marking lifting platform. After realizing one-time artificial feeding, device automatically completes the task of measurement, marking, greatly improves the measurement precision and efficiency of plate spring symmetry, and liberates labor, saves labor cost.

Description

Technical Field

[0001] This invention belongs to the field of testing equipment technology, and more specifically, relates to an automatic measuring device and method for the leaf spring of a train motor hanger. Background Technology

[0002] As a crucial component of the power input system in subway and high-speed trains, the motor hanger of a high-speed train involves disassembly, inspection, and assembly processes as a routinely maintained part. The leaf spring of the motor hanger is a vital component of this system. For some high-speed train parts with leaf spring structures, inspection and measurement procedures are required. After inspection, inspection information is engraved on the side of the leaf spring, and the measured deviation values ​​provide data guidance for assembly. During the pre-assembly of the motor hanger plates, thickness variations exist during manufacturing, which can lead to differences in stiffness. Therefore, the difference in deviation values ​​for leaf springs on the same motor side should not exceed 0.2mm.

[0003] Currently, there is no measuring equipment available for this product on the market. Measuring leaf springs is a special requirement for high-speed train products, so currently only manual measurement is used; there are no automated measuring devices or dedicated machines. At present, symmetrical measurement of leaf springs employs a manual operation mode. A special fixture is used to fix the leaf spring, and indirect measurement is performed using a feeler gauge. Specifically: the leaf spring is fixed on the special fixture, and the gap A between the fixing plate and the indirect pin is measured using a feeler gauge (this is the value on the front side). The workpiece is then reversed and fixed, and the gap B is measured using a feeler gauge (this is the value on the back side). This method achieves a certain measurement effect, and the measurement results can serve as a reference.

[0004] However, manual measurement is subject to subjective factors, resulting in poor consistency among multiple measurements and numerous human interferences. This leads to inconsistent values ​​from different individuals, making it impossible to confirm specific measurements. Furthermore, the need for secondary clamping during measurement significantly complicates the process. On the other hand, manually recorded data is easily lost or misrecorded in chaotic environments, further hindering the measurement process. For on-site measurement, problems include cumbersome procedures, slow speed, significant accuracy deviations, and unscientific data processing. Therefore, a device for measuring the symmetry of leaf springs is needed to improve measurement speed and accuracy, meeting the requirements of high-speed train maintenance. Summary of the Invention

[0005] To address the aforementioned deficiencies or improvement needs of existing technologies, this invention provides an automatic measuring device and method for the leaf springs of a train motor hanger. It uses dual measuring sensors to replace traditional manual feeler gauge measurements, measuring the deviation at both ends of the leaf spring in a single operation. Furthermore, the measurement, recording, and marking tasks are all completed automatically. After a single manual loading, the device automatically completes the measurement and marking tasks, with all measurement and recording performed by the machine. This significantly improves the accuracy and efficiency of measuring the symmetry of the leaf spring, while also freeing up labor and saving labor costs.

[0006] According to a first aspect of the present invention, an automatic measuring device for the leaf spring of a train motor hanger is provided, comprising:

[0007] A mounting base that provides support for the entire device, the mounting base including a support frame at the bottom and a support plate on the support frame;

[0008] A clamping device is provided on the support plate. The clamping device includes a leaf spring mounting bracket provided on the support plate, a mounting reference pin provided at the center of the leaf spring mounting bracket, and a pressing swing arm cylinder provided on the side of the leaf spring mounting bracket, for installing and fixing the leaf spring to be tested.

[0009] A support device is provided on the support plate, the support device including a support cylinder and a support contour block provided on the piston of the support cylinder, to provide temporary support for fixing the leaf spring;

[0010] A measuring device located near the support device, the measuring device including a telescopic component, a pressing component on the telescopic component, and a measuring sensor on the pressing component, measures the symmetry of the leaf spring;

[0011] And a laser engraving device disposed on the support plate, the laser engraving device including an engraving lifting platform and a laser engraving machine disposed on the engraving lifting platform, which engraves the measured information onto the leaf spring.

[0012] Furthermore, the measuring device also includes a measuring bracket disposed on the support plate, and the telescopic component is fixed to the measuring bracket;

[0013] And a measuring and limiting component located on one side of the support device.

[0014] Furthermore, the measuring and limiting assembly includes a limiting bracket disposed on the support plate;

[0015] A limit detection switch is provided on the side of the limit bracket;

[0016] And a measuring block that is manually installed inside the leaf spring lug, the measuring block being concentrically set with the leaf spring lug and having equal-length round pins extending from both ends.

[0017] Furthermore, the telescopic assembly includes a telescopic cylinder connected to the measuring bracket;

[0018] Telescopic slide rail fixed to the cylinder body of the telescopic cylinder;

[0019] And a telescopic slider fixed to the piston of the telescopic cylinder.

[0020] Furthermore, the pressing assembly includes a pressing cylinder fixed to the telescopic slider;

[0021] A downward sliding rail fixed to the cylinder body of the downward pressing cylinder;

[0022] And a downward sliding block fixed to the piston of the downward cylinder.

[0023] Furthermore, there are two measuring sensors, which are fixed to both ends of the pressing slider.

[0024] Furthermore, the engraving lifting platform includes a lifting platform bracket disposed on the support plate;

[0025] The lifting slide rail is provided on the lifting platform support, and the upper and lower parts of the lifting slide rail are equipped with bearings, and the front sides are provided with slide rails.

[0026] A lifting screw is mounted on the two bearings of the lifting slide rail;

[0027] A lifting slider is provided on the lifting slide rail;

[0028] And a lifting handwheel connected to the upper end of the lifting screw, with a locking device installed below the lifting handwheel.

[0029] Furthermore, it also includes:

[0030] A protective cover installed around the entire equipment to protect it.

[0031] The operation box is located on the side of the protective cover;

[0032] And a touch screen display located on the same side of the protective cover as the control box.

[0033] Furthermore, the operation box is equipped with a two-hand start button, an emergency stop button, and a measuring block placement slot, in which the measuring block is placed when the device is in standby mode.

[0034] According to a second aspect of the present invention, an automatic measurement method for the leaf spring of a train motor hanger is provided, comprising the following steps:

[0035] S100. Material loading preparation: Check whether the equipment is in standby mode and has the conditions for material loading and testing. Confirm that each cylinder is in the original position and make preparations before material loading.

[0036] S200, Loading: The workpiece is placed manually on the mounting reference pin. The flat plate and the upper surface of the leaf spring support frame are in contact. The leaf spring pin shaft side is in contact with the support contour block. The pressing swing arm cylinder presses the workpiece. The arrival detection signal light confirms whether it is green.

[0037] S300, Install the measuring block: After the workpiece is installed in place, manually place the measuring block in the leaf spring pin hole and push the other end of the measuring block to contact the limit bracket. Check if the measuring block detection indicator light is green.

[0038] S400 Measurement: After all the detection indicator lights are on, press the start button with both hands. The measurement module will automatically extend and press down to contact the measurement block. The deviation between the front and back of the leaf spring will be measured indirectly. The system will automatically calculate the result and display it on the touch screen.

[0039] S500, Engraving: After the measurement is qualified, the measurement is retrieved. The laser engraving machine automatically engraves the maintenance information on the leaf spring. After completion, the leaf spring pin side support rises, the right side clamping swing arm cylinder is released, the measuring block is manually placed back to the fixed position, the workpiece is taken off the line, and the measurement is completed.

[0040] In summary, compared with the prior art, the above-described technical solutions conceived by this invention can achieve the following beneficial effects:

[0041] 1. The present invention provides an automatic measuring device for leaf springs of a train motor hanger. The device uses a clamping device to install and fix the leaf spring to be measured, and a supporting device to provide temporary support for fixing the leaf spring. After the measuring device measures the symmetry of the leaf spring, it engraves the measured information onto the leaf spring. After one manual loading, the device automatically completes the measurement and engraving tasks. The measurement and recording are all done by the machine, which greatly improves the accuracy and efficiency of measuring the symmetry of the leaf spring, and also frees up labor and saves labor costs.

[0042] 2. The automatic measuring device for the leaf spring of a train motor hanger of the present invention utilizes dual measuring sensors to simultaneously measure two measuring points of the leaf spring. The accuracy of mechanical measurement is far higher than that of manual measurement, and it avoids the influence of errors caused by human subjectivity. It not only simplifies the operation steps, achieving the goal of measuring all parts in one installation, but also avoids the installation errors that may occur during secondary installation, further improving the measurement accuracy of the equipment.

[0043] 3. The automatic measuring device for the leaf spring of a train motor hanger of the present invention analyzes the measurement results directly by the built-in data processing module and displays them on the touch screen. After the measurement is completed, it directly communicates with the laser engraving device to engrave the measurement information on the leaf spring, avoiding the possibility of data loss caused by manual recording. Furthermore, the mechanical automated engraving replaces manual engraving, which speeds up the measurement efficiency and avoids human error.

[0044] 4. The automatic measuring device for leaf springs of a train motor hanger of the present invention is equipped with multiple position detection switches. The device is started only after all position detection switches have detected normal signals, so as to further control the installation accuracy of the leaf spring measurement and prevent the situation where the operator fails to install it properly, which would affect the measurement accuracy of the device. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the structure of an automatic measuring device for a train motor hanger leaf spring according to an embodiment of the present invention;

[0046] Figure 2 This is a schematic diagram of the internal structure of an automatic measuring device for a train motor hanger leaf spring according to an embodiment of the present invention;

[0047] Figure 3 This is a schematic diagram of the clamping device structure of an automatic measuring device for a train motor hanger leaf spring according to an embodiment of the present invention;

[0048] Figure 4 This is a schematic diagram of the support device structure of an automatic measuring device for a train motor hanger leaf spring according to an embodiment of the present invention;

[0049] Figure 5 This is a schematic diagram of the measurement limit component structure of an automatic measurement device for a train motor hanger leaf spring according to an embodiment of the present invention;

[0050] Figure 6 This is a schematic diagram of the telescopic component and the pressing component of an automatic measuring device for a train motor hanger leaf spring according to an embodiment of the present invention;

[0051] Figure 7 This is a schematic diagram of the laser engraving device structure of an automatic measuring equipment for a train motor hanger leaf spring according to an embodiment of the present invention;

[0052] Figure 8 This is a flowchart illustrating the steps of an automatic measurement method for a train motor hanger leaf spring according to an embodiment of the present invention.

[0053] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1-Mounting base, 11-Support frame, 12-Support plate, 2-Clamping device, 21-Leaf spring mounting bracket, 22-Mounting reference pin, 23-Mounting guide, 24-Mounting detection switch, 25-Clamping swing arm cylinder, 3-Supporting device, 31-Supporting cylinder, 32-Supporting contour block, 4-Measuring device, 41-Measuring bracket, 42-Measuring limit assembly, 421-Limit bracket, 422-Limit detection switch, 423- Measuring block, 43-telescopic assembly, 431-telescopic cylinder, 432-telescopic slide rail, 433-telescopic slider, 44-pressing assembly, 441-pressing cylinder, 442-pressing slide rail, 443-pressing slider, 45-measuring sensor, 5-laser engraving device, 51-engraving lifting platform, 511-lifting platform bracket, 512-lifting screw, 513-lifting slide rail, 514-lifting slider, 515-lifting handwheel, 52-laser engraving machine, 6-protective cover, 7-operation box, 8-touch display screen. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0055] like Figure 1-2 As shown, this embodiment of the invention provides an automatic measuring device for the leaf spring of a train motor hanger, including a mounting base 1 that supports the entire device, a clamping device 2 fixed to the mounting base 1, a support device 3 fixed to the mounting base 1, a measuring device 4 fixed to the mounting base 1, a laser engraving device 5 fixed to the mounting base 1, a protective cover 6 on the outer layer of the measuring device, an operation box 7 on the protective cover 6, and a touch screen display 8 mounted on the side of the protective cover 6. The leaf spring to be measured only needs to be manually installed on the clamping device 2 of the device, and the start switch is pressed. The measuring device 4 automatically measures the symmetry of the leaf spring. After the measurement is completed, the generated measurement data is displayed on the touch screen display 8, and the engraving and inspection content is selected. The laser engraving device 5 then completes the information engraving on the side of the leaf spring. After one manual loading, the device automatically completes the measurement and engraving tasks, and the measurement and recording are all done by the machine, greatly improving the accuracy and efficiency of leaf spring symmetry measurement, freeing up labor, and saving labor costs.

[0056] The mounting base 1 includes a support frame 11 that supports the entire device and a support plate 12 fixed to the support frame 11. The support frame 11 is welded from square steel and has a two-layer structure. Support pads are installed at the four corners of the lower layer's bottom surface. The height of these support pads can be adjusted according to the surface conditions, ensuring the device remains stable. Furthermore, the two-layer structure provides greater structural stability. The support plate 12 is a thick steel plate structure, fixed to the support frame 11 with screws, and is used to mount other parts of the device.

[0057] like Figure 3 As shown, the clamping device 2 includes a leaf spring mounting bracket 21 that provides support for the leaf spring to be measured, a mounting reference pin 22 mounted on the leaf spring mounting bracket 21, mounting guides 23 mounted on both sides of the mounting bracket 21, mounting detection switches 24 located at both ends of the mounting bracket 21, and a clamping swing arm cylinder 25 located on the side of the mounting bracket 21. The bottom of the leaf spring mounting bracket 21 is a multi-strip square plate structure, vertically fixed to the support plate 12. The top is a thick steel plate structure, welded and fixed to the bottom structure. The top steel plate undergoes precision machining to ensure the surface quality of the contact surface with the leaf spring to be measured, avoiding errors in the measurement results due to installation positioning. The mounting reference pin 22 is fixed to the leaf spring mounting bracket 21, corresponding to the hole position at the flat end of the leaf spring, and plays a positioning role in the installation of the leaf spring. The installation guides 23 are used in sets of two, forming a trapezoidal block structure. One guide is square at the bottom and fixed to each side of the leaf spring mounting bracket 21. The top extends beyond the top surface of the leaf spring mounting bracket 21 and is divided into an angled opening to guide the positioning of the leaf spring. The installation detection switches 24 are installed at both ends of the top surface of the leaf spring mounting bracket 21 to detect whether the leaf spring is installed correctly. Both ends simultaneously detect the installation gap, making the detection results more accurate and effectively preventing measurement accuracy failure due to installation errors. At least two clamping swing arm cylinders 25 are located on one side of the leaf spring mounting bracket 21, with their bottoms fixed to the support plate 12. A swing arm is connected to the piston. The swing arm bends laterally and can rotate in the horizontal plane. When the swing arm rotates above the leaf spring mounting bracket 21, the clamping swing arm cylinders 25 retract downwards, and the front end of the swing arm clamps the leaf spring. During installation, this system provides assurance in terms of leaf spring fit, clamping, and detection, ensuring that the leaf spring is accurately positioned to be inspected before measurement, guaranteeing the normal progress of subsequent testing, and keeping the detection accuracy within the allowable error range.

[0058] like Figure 4As shown, the support device 3 includes a support cylinder 31 that provides support force and a support contour block 32 mounted on the piston of the support cylinder 31. The support cylinder 31 is fixed to the support plate 12, and the support contour block 32 is fixed at its bottom to the piston of the support cylinder 31, with an arc-shaped top that moves up and down with the extension and retraction of the piston. During leaf spring installation, one end of the leaf spring coil that is not fully fixed is placed on the support contour block 32 to provide temporary support for the leaf spring and prevent it from shifting position during fixing. After the leaf spring is fixed, the support cylinder 31 retracts, causing the support contour block 32 to move downwards, releasing the support force on the leaf spring and preventing it from affecting the measurement and causing errors in the measurement results.

[0059] like Figure 4-6 As shown, the measuring device 4 includes a measuring bracket 41 fixed to the support plate 12, a measuring limiting component 42 located on one side of the support device 3, a telescopic component 43 fixed to the measuring bracket 41, a pressing component 44 fixed to the front end of the telescopic component 43, and a measuring sensor 45 fixed to the piston front end of the pressing component 44. By simultaneously measuring both ends of the leaf spring to be measured, the final measurement deviation is quickly and accurately calculated through background data processing, obtaining the symmetry measurement data of the leaf spring. This optimizes the measurement steps, avoids secondary installation of the leaf spring, improves the measurement efficiency of the leaf spring, and controls a smaller measurement error.

[0060] The measuring and limiting assembly 42 includes a limiting bracket 421 fixed to the support plate 12, a limiting detection switch 422 fixed to the side of the limiting bracket, and a measuring block 423 installed in the leaf spring lug before measurement. The limiting bracket 421 is an "L"-shaped bracket with a small mounting bracket near the support device 3 and reinforcing ribs on the back. The limiting detection switch 422 is mounted on the mounting bracket of the limiting bracket 421. The measuring block 423 is a cylindrical structure with a pin of equal length extending from both ends. During measurement, it is manually inserted into the leaf spring lug. The two are arranged concentrically. When inserted, the limiting bracket 421 limits the measuring block 423, while the limiting detection switch 422 detects whether the measuring block 423 is inserted in place, ensuring that the pins extending from both sides of the measuring block 423 are of the same length.

[0061] The measuring bracket 41 is located to the side of the measuring limiting assembly 42 and is used to support and fix other components of the device. The telescopic assembly 43 is fixed to the measuring bracket 41 and includes a telescopic cylinder 431 that provides power, a telescopic slide rail 432 connected to the cylinder body of the telescopic cylinder 431, and a telescopic slider 433 connected to the piston rod of the telescopic cylinder 431. The telescopic slide rail 432 and the telescopic slider 433 cooperate with each other to make the telescopic slider 433's telescopic movement more flexible. The pressing assembly 44 includes a pressing cylinder 441 fixed to the side of the telescopic slider 433 and providing power, a pressing slide rail 442 fixedly connected to the cylinder body of the pressing cylinder 441, and a pressing slider 443 connected to the piston of the pressing cylinder 441. The pressing slide rail 442 and the pressing slider 443 cooperate with each other and move up and down under the action of the pressing cylinder 441. The measuring sensor 45, fixed to the pressing slider 443, is a high-precision linear displacement sensor that replaces feeler gauges to accurately measure the deviation from the reference surface, offering higher measurement accuracy. Furthermore, the measuring head uses a flat-face contact design, ensuring that both ends of the measuring block are cylindrical, while also compensating for minor adjustments in the measurement position.

[0062] Preferably, both the telescopic cylinder 431 and the pressing cylinder 441 are equipped with precise limit adjustment blocks and positioning sensors to ensure accurate positioning of the sensor measurement position. The telescopic cylinder 431 extends forward, driving the telescopic slider 433 to above the predetermined measurement position. Then, the pressing cylinder 441 drives the pressing slider 443 downward, causing the measuring sensor 45 on the pressing slider 443 to reach the predicted position and contact the pins at both ends of the measuring block 423, thus completing the measurement of the leaf spring balance.

[0063] like Figure 7As shown, the laser engraving device 5 is located on the side of the clamping swing arm cylinder 25, and includes an engraving lifting platform 51 and a laser engraving machine 52 mounted on the lifting platform 51. The engraving lifting platform 51 includes a lifting platform bracket 511, a lifting slide rail 513 mounted on the lifting platform bracket 511, a lifting screw 512 mounted on the lifting slide rail 513, a lifting slider 514 cooperating with the lifting screw 512, and a lifting handwheel 515 connected to one end of the lifting screw 512. The lifting platform bracket 511 is an "L"-shaped bracket with reinforcing ribs on the back. The lifting slide rail 513 is a box structure with one open side; the front is open and the back is fixed to the lifting platform bracket 511 with screws. It has a central hole at the top for mounting a bearing, a bearing seat at the bottom, and slide rails on both sides of the front. The lifting screw 512 is mounted on two bearing seats at both ends, with its upper end extending beyond the lifting slide rail 513. The vertical plate of the lifting slider 514 is fastened to the slide rails of the lifting slide rail 513 on both sides. A platform is provided at the top, with reinforcing ribs between the platform and the vertical plate. The back of the vertical plate is a box containing a rotatable internally threaded bushing, which is threadedly connected to the lifting screw 512. The lifting handwheel 515 is connected to the upper end of the lifting screw 512, controlling the lifting and lowering of the slider 514. A locking device is provided below the lifting handwheel 515, locking the slider 514 when it reaches a suitable height. The laser engraving machine 52 is fixed to the lifting slider 514 and moves with it, enabling focusing. After measuring the leaf spring, the measured information is transmitted to the laser engraving machine 52, which directly engraves the maintenance information onto the leaf spring, eliminating the need for manual re-engraving. This simplifies the measurement and engraving process, reduces manual operation, and avoids indirect operations that could lead to mis-engraved information.

[0064] The protective cover 6 is located to enclose and protect the entire equipment that does not require manual operation, preventing workshop parts, debris and other substances from entering the equipment during daily operation, damaging the equipment's components, and consequently affecting the accuracy of the leaf spring symmetry measurement. The top of the protective cover 6 is equipped with a three-color light to indicate the operating status of the equipment.

[0065] The operation box 7 is installed on the side of the protective cover 6 and is equipped with a two-hand start button, an emergency stop button and a measuring block placement slot to start and stop the equipment, and to store the measuring block 423 in the measuring block placement slot.

[0066] The touch screen 8 is installed on the side of the protective cover 6 and is located on the same side as the operation box 7. It detects the operating status of the equipment, displays measurement data, and performs debugging and testing of the equipment.

[0067] like Figure 8As shown, this embodiment of the invention provides an automatic measurement method for the leaf spring of a train motor hanger, including the following steps:

[0068] S100. Material loading preparation: Check whether the equipment is in standby mode and has the conditions for material loading and testing. Confirm that each cylinder is in the original position and make preparations before material loading.

[0069] S200, Loading: The workpiece is manually placed on the mounting reference pin 22, the flat plate is in contact with the upper surface of the leaf spring support frame 21, the leaf spring pin shaft side is in contact with the support contour block 32, the pressing swing arm cylinder 25 presses the workpiece, and the arrival detection signal light confirms whether it is green.

[0070] S300, Install the measuring block: After the workpiece is installed in place, manually place the measuring block 423 in the leaf spring pin hole, and push the other end of the measuring block 423 to contact the limit bracket 421. Check whether the measuring block detection indicator light is green.

[0071] S400 Measurement: After all the detection indicator lights are on, press the start button with both hands. The measurement module will automatically extend and press down. The measurement sensor 45 will contact the measurement block 423 to measure the deviation value between the front and back of the leaf spring in an indirect manner. The system will automatically calculate the result and display it on the touch screen 8.

[0072] S500, Engraving: After the measurement is qualified, the measurement is retrieved. The laser engraving machine 52 automatically engraves the maintenance information on the leaf spring. After completion, the leaf spring pin side support rises, the right side clamping swing arm cylinder 25 is released, the measuring block 423 is manually placed back to the fixed position, the workpiece is taken off the line, and the measurement is completed.

[0073] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An automatic measuring device for the leaf spring of a train motor hanger, characterized in that, include: A mounting base (1) that provides support for the entire device, the mounting base (1) including a support frame (11) at the bottom and a support plate (12) on the support frame (11). A clamping device (2) is provided on the support plate (12). The clamping device (2) includes a leaf spring mounting bracket (21) provided on the support plate (12), a mounting reference pin (22) provided at the center of the leaf spring mounting bracket (21), and a pressing swing arm cylinder (25) provided on the side of the leaf spring mounting bracket (21) to install and fix the leaf spring to be tested. A support device (3) is provided on the support plate (12), the support device (3) includes a support cylinder (3) and a support contour block (32) provided on the piston of the support cylinder (31), which provides temporary support for fixing the leaf spring; A measuring device (4) is provided near the support device (3). The measuring device (4) includes a telescopic component (43), a pressing component (44) provided on the telescopic component (43), and a measuring sensor (45) provided on the pressing component (44) to measure the symmetry of the leaf spring. And a laser engraving device (5) provided on the support plate (12), the laser engraving device (5) includes an engraving lifting platform (51) and a laser engraving machine (52) provided on the engraving lifting platform (51), which engraves the measured information onto the leaf spring; The engraving lifting platform (51) includes a lifting platform bracket (511) disposed on the support plate (12). The lifting slide rail (513) is provided on the lifting platform support (511). The lifting slide rail (513) is equipped with bearings at both the top and bottom, and has slide rails on both sides of the front. The lifting screw (512) is provided on the two bearings of the lifting slide rail (513). A lifting slider (514) is provided on the slide rail (513); And a lifting handwheel (515) connected to the upper end of the lifting screw (512), wherein a locking device is installed below the lifting handwheel (515); The support cylinder (31) is fixed on the support plate (12), and the bottom of the support contour block (32) is fixed on the piston of the support cylinder (31). The top is arc-shaped and moves up and down with the extension and retraction of the piston of the support cylinder (31). When the leaf spring is installed, one end of the leaf spring coil that is not completely fixed is placed on the support contour block (32) to provide temporary support for the leaf spring and prevent it from shifting position when it is fixed. After the leaf spring is fixed, the support cylinder (31) retracts and drives the support contour block (32) to move downward.

2. The automatic measuring device for the leaf spring of a train motor hanger according to claim 1, characterized in that, The measuring device (4) further includes a measuring bracket (41) disposed on the support plate (12), and the telescopic component (43) is fixed on the measuring bracket (41); And a measuring and limiting assembly (42) located on one side of the support device (3).

3. The automatic measuring device for the leaf spring of a train motor hanger according to claim 2, characterized in that, The measuring limiting component (42) includes a limiting bracket (421) disposed on the support plate (12). A limit detection switch (422) is provided on the side of the limit bracket (421); And a measuring block (423) manually installed in the leaf spring lug, the measuring block (423) being concentrically set with the leaf spring lug and having equal-length round pins extending from both ends.

4. An automatic measuring device for a train motor hanger leaf spring according to any one of claims 1-3, characterized in that, The telescopic assembly (43) includes a telescopic cylinder (431) connected to the measuring bracket (41). Telescopic slide rail (432) fixed on the cylinder body of the telescopic cylinder (431); And a telescopic slider (433) fixed to the piston of the telescopic cylinder (431).

5. An automatic measuring device for a train motor hanger leaf spring according to any one of claims 1-3, characterized in that, The pressing assembly (44) includes a pressing cylinder (441) fixed to the telescopic slider (433). A downward slide rail (442) is fixed on the cylinder body of the downward cylinder (441). And a downward sliding block (443) fixed to the piston of the downward cylinder (441).

6. An automatic measuring device for a train motor hanger leaf spring according to any one of claims 1-3, characterized in that, The measuring sensors (45) are arranged in pairs and fixed at both ends of the pressing slider (443).

7. An automatic measuring device for a train motor hanger leaf spring according to any one of claims 1-3, characterized in that, Also includes: A protective cover (6) is installed around the entire equipment to protect it. An operation box (7) is located on the side of the protective cover (6); And a touch screen (8) located on the same side of the protective cover (6) and the operation box (7).

8. An automatic measuring device for a train motor hanger leaf spring according to claim 7, characterized in that, The operation box (7) is equipped with a two-hand start button, an emergency stop button and a measuring block placement slot. When the device is in standby mode, the measuring block (423) is placed in the slot.

9. An automatic measurement method for the leaf springs of a train motor hanger, implemented using the automatic measurement equipment for the leaf springs of a train motor hanger as described in any one of claims 1-8, comprising the following steps: S100. Material loading preparation: Check whether the equipment is in standby mode and has the conditions for material loading and testing. Confirm that each cylinder is in the original position and make preparations before material loading. S200, Loading: The workpiece is placed manually on the mounting reference pin (22), the flat plate is in contact with the upper surface of the leaf spring support frame (21), the leaf spring pin shaft side is in contact with the support contour block (32), the pressing swing arm cylinder (25) presses the workpiece, and the position detection signal light confirms whether it is green. S300, Install the measuring block: After the workpiece is installed in place, manually place the measuring block (423) in the leaf spring pin hole and push the other end of the measuring block (423) to contact the limit bracket (421). The measuring block detects whether the positioning signal light is green. S400, Measurement: After all the detection indicator lights are on, press the start button with both hands. The measurement module will automatically extend and press down. The measurement sensor (45) will contact the measurement block (423) to measure the deviation value of the front and back surfaces of the leaf spring indirectly. The system will automatically calculate the result and display the result on the touch screen (8). S500, Engraving: After the measurement is qualified, the measurement is retrieved. The laser engraving machine (52) automatically engraves the maintenance information on the leaf spring. After completion, the leaf spring pin side support rises, the right side pressing swing arm cylinder (25) is released, the measuring block (423) is manually placed back to the fixed position, the workpiece is taken off the line, and the measurement is completed.

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