Railway vehicle body weighing device

Abstract

The application discloses a kind of rail vehicle body weighing equipment.The equipment includes frame body, transverse drive mechanism and two weighing units.Transverse drive mechanism is arranged at the bottom of frame, including wheel pair and track, and the driving equipment is independently moved.Each weighing unit includes mounting seat, guide support frame, lifting plate, weighing sensor, screw elevator, speed reducer and servo motor.Two sets of the equipment can be used separately, and the four weighing units thereon jointly constitute the four-corner weighing support point of the vehicle body.The application solves the problem of poor flexibility and inconvenience of deployment of fixed weighing equipment through modularized movement design, realizes four-point synchronous jacking and automatic data acquisition through servo motor and PLC control system, effectively improves weighing efficiency, precision and automation level, and is suitable for rapid and accurate weighing and gravity calculation of various vehicle types.

Description

Technical Field

[0001] This application relates to the field of weighing and leveling technology in the manufacturing and maintenance of rail vehicles, and in particular to a weighing device for rail vehicle bodies. Background Technology

[0002] In the manufacturing, repair, and maintenance of rail vehicles (especially high-speed trains), accurately weighing the car body and calculating its center of gravity is a crucial step. Deviations in the car's center of gravity can severely affect the train's dynamic performance and stability during operation, potentially leading to safety hazards, especially when cornering at high speeds.

[0003] Currently, the industry mostly uses fixed four-corner weighing equipment to achieve the above functions. For example, a vehicle body four-corner weighing device disclosed in Chinese Patent Publication No. CN101398326A uses T-shaped guide rails pre-embedded in the ground to adjust the position of the supporting beam, and then uses sliding support seats on the beam to adapt to vehicle bodies of different widths. Although this equipment can achieve weighing and center of gravity calculation, it has significant shortcomings: First, the equipment is a fixed structure, requiring a large guide rail system to be laid in advance on the workshop foundation. The installation position is fixed and cannot be moved, resulting in extremely poor flexibility and difficulty in adapting to the layout requirements of different production lines or maintenance stations. Second, its position adjustment relies on manual mechanical adjustment, the operation process is cumbersome, time-consuming and labor-intensive, the adjustment accuracy depends on the worker's experience, and the efficiency is low, making it difficult to meet the pace of modern production.

[0004] Therefore, existing fixed weighing equipment cannot balance flexibility in use with high operational efficiency, which has become a key technical bottleneck restricting the improvement of production and debugging efficiency. Utility Model Content

[0005] The purpose of this application is to provide a rail vehicle body weighing device that can be quickly deployed, flexibly moved, and automatically and precisely controlled.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A weighing device for a rail vehicle body, comprising:

[0008] A frame body;

[0009] A lateral drive mechanism is disposed at the bottom of the frame body for driving the device to move independently. The lateral drive mechanism includes a wheelset and a track that cooperates with the wheelset.

[0010] Two weighing units are arranged side by side on the upper surface of the vehicle frame body; each weighing unit includes a mounting base, a guide support frame, a lifting plate, a weighing sensor, a screw jack, a reducer, and a servo motor.

[0011] The mounting base is fixed to the vehicle frame body, the guide support frame is mounted on the mounting base, the lifting plate is movably mounted on the guide support frame, the weighing sensor is located between the lifting plate and the screw jack, the screw jack is connected to the output end of the reducer, and the servo motor is connected to the input end of the reducer to drive the lifting plate to move up and down;

[0012] The two sets of vehicle body weighing devices can be used separately and in combination, with their four weighing units forming support points for weighing the four corners of the vehicle body.

[0013] Furthermore, the surface of the lifting plate is provided with support pads.

[0014] Furthermore, the weighing unit is mounted on the frame body via an adjusting pressure plate, and the lateral distance between the two weighing units on the frame body can be adjusted by loosening the adjusting pressure plate.

[0015] Furthermore, the bottom of the mounting base is provided with an outwardly extending edge, and the adjusting pressure plate presses against the upper surface of the extending edge and is connected to the vehicle frame body by screws.

[0016] Furthermore, a braking device is provided on the main body of the frame corresponding to the position of the wheelset for braking and locking the wheelset.

[0017] Furthermore, the braking device includes a brake block, a drive device for driving the brake block to move, and a brake block adjustment assembly for adjusting the initial position of the brake block; the drive device is mounted on the brake block adjustment assembly.

[0018] Furthermore, the driving device is an electric actuator.

[0019] Furthermore, the brake block adjustment assembly includes a lead screw and nut pair, a rocker wheel connected to the lead screw, and an adjustment moving plate on which the drive device is mounted; rotating the rocker wheel can drive the adjustment moving plate to move, thereby adjusting the initial distance between the brake block and the side of the wheelset.

[0020] Furthermore, the servo motor is connected to a PLC control system, and the signal output terminal of the weighing sensor is connected to an industrial computer; the PLC control system can control the synchronous lifting and lowering of the four weighing units in the two sets of equipment, and the industrial computer is used to collect data from the four weighing sensors and calculate the vehicle weight and center of gravity position.

[0021] Furthermore, the frame body is provided with scale markings to indicate the installation position of the weighing unit.

[0022] The beneficial effects of this application are as follows:

[0023] (1) This application sets up an independent transverse drive mechanism (wheelset and track) for each set of equipment, so that the equipment can be moved freely to different workstations or production lines as needed, completely eliminating the dependence of traditional fixed weighing equipment on pre-buried foundations and fixed installation positions. This modular and mobile design concept greatly improves the adaptability to production layout and maintenance site, and realizes a flexible operation mode of "equipment finding vehicle" rather than "vehicle finding equipment".

[0024] (2) This application uses a servo motor, a reducer and a screw jack to form an electric drive system, which can be uniformly controlled by a PLC control system, realizing the automation of the lifting and lowering process of the vehicle body. Operators do not need to perform heavy manual mechanical adjustments. They can precisely control the synchronous lifting of the four weighing units through the control terminal, which greatly reduces labor intensity, shortens operation time, improves work efficiency and can better meet the rhythm requirements of modern production.

[0025] (3) After the two sets of equipment in this application are moved and positioned independently, they can be firmly locked by the braking device, which eliminates the risk of errors introduced by equipment movement during the weighing process and provides a stable basis for weighing. On the other hand, the pressure data of the four weighing units are collected and processed in real time by the industrial control computer, which automatically calculates the weight of the whole vehicle and the center of gravity coordinates, avoiding errors that may be caused by manual reading, recording and calculation, and ensuring the accuracy and reliability of the data. Attached Figure Description

[0026] Figure 1 Schematic diagrams of the structures of two sets of vehicle weighing devices A provided in an embodiment of this application;

[0027] Figure 2 This is a schematic diagram of the structure of a rail vehicle body weighing device provided in an embodiment of this application;

[0028] Figure 3 This is a schematic diagram of the structure of a weighing unit provided in an embodiment of this application;

[0029] Figure 4 This is a schematic diagram of the structure of a braking device provided in an embodiment of this application;

[0030] Figure 5 for Figure 4 A magnified view of a section at point B.

[0031] Explanation of reference numerals in the attached figures:

[0032] A. Vehicle weighing equipment;

[0033] 1. Chassis main body; 2. Lateral drive mechanism; 3. Weighing unit; 4. Braking device;

[0034] 21. Wheelset;

[0035] 31. Mounting base; 32. Guide support frame; 33. Lifting plate; 34. Weighing sensor; 35. Screw jack; 36. Reducer; 37. Servo motor; 38. Support pad; 39. Adjusting pressure plate;

[0036] 311. Extended edge;

[0037] 41. Brake block; 42. Drive unit; 43. Brake block adjustment assembly;

[0038] 431. Lead screw and nut pair; 432. Rocker wheel; 433. Adjustment plate; Detailed Implementation

[0039] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0040] In the description of this application, it should be understood that the terms "upper," "lower," "left," "right," etc., are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In particular, the understanding of the term "upper" following a noun in the claims should be understood as meaning that the entire inner and outer surfaces of the structure referred to by the noun conform to the definition of "upper."

[0041] The following detailed description, in conjunction with the accompanying drawings and preferred embodiments, describes the specific implementation methods, structures, features, and effects provided in this application.

[0042] like Figures 1 to 2 As shown, a rail vehicle body weighing device A includes:

[0043] One frame body 1;

[0044] A lateral drive mechanism 2 is disposed at the bottom of the frame body 1 for driving the device to move independently. The lateral drive mechanism 2 includes a wheelset 21 and a track that cooperates with the wheelset 21.

[0045] like Figure 3 As shown, two weighing units 3 are arranged side by side on the upper surface of the vehicle frame body 1; each weighing unit 3 includes a mounting base 31, a guide support frame 32, a lifting plate 33, a weighing sensor 34, a screw jack 35, a reducer 36, and a servo motor 37.

[0046] The mounting base 31 is fixed to the vehicle frame body 1, the guide support frame 32 is mounted on the mounting base 31, the lifting plate 33 is movably mounted on the guide support frame 32, the weighing sensor 34 is located between the lifting plate 33 and the screw jack 35, the screw jack 35 is connected to the output end of the reducer 36, and the servo motor 37 is connected to the input end of the reducer 36 to drive the lifting plate 33 to rise and fall;

[0047] Among them, the two sets of vehicle body weighing equipment A can be used separately and in combination, and the four weighing units 3 on them together constitute the support points for weighing the four corners of the vehicle body.

[0048] like Figure 3 As shown, the surface of the lifting plate 33 is further provided with a support strip 38. The support strip 38 can effectively prevent wear caused by direct contact between the surface of the lifting plate 33 and the vehicle body, protecting the paint and structure of the vehicle body; at the same time, the replaceable design allows for quick replacement of matching strips according to the support structure shape of different vehicle bodies, enhancing the versatility of the equipment and the protection of the vehicle body.

[0049] like Figure 2 As shown, the weighing unit 3 is further mounted on the frame body 1 via an adjusting plate 39. The lateral spacing between the two weighing units 3 on the frame body 1 can be adjusted by loosening the adjusting plate 39. By simply loosening and tightening the adjusting plate 39, the lateral spacing between the two weighing units 3 on a single set of equipment can be quickly adjusted, allowing one set of equipment to flexibly adapt to vehicle bodies of different widths, significantly improving the applicability and adjustment efficiency of the equipment.

[0050] like Figure 3 As shown, the mounting base 31 further includes an outwardly extending edge 311 at its bottom. The adjusting plate 39 presses against the upper surface of the extending edge 311 and connects it to the frame body 1 with screws. The design of the extension edge 311 at the bottom of the mounting base 31 and the adjusting plate 39 provides a stable and load-bearing mounting base for the weighing unit 3. The method of pressing down from above by the adjusting plate 39 ensures a firm and reliable connection, preventing the weighing unit 3 from shifting or loosening under heavy loads and ensuring measurement stability.

[0051] like Figure 4 As shown, a braking device 4 is further provided on the frame body 1 at the position corresponding to the wheelset 21, for braking and locking the wheelset 21. After the equipment is moved into place, the braking device 4 can quickly and reliably lock the wheelset 21, completely eliminating the possibility of errors or risks introduced due to accidental movement of the equipment during precision weighing, and providing a solid foundation for high-precision measurement.

[0052] like Figure 5 As shown, the braking device 4 further includes a brake block 41, a drive device 42 for driving the brake block 41, and a brake block adjustment assembly 43 for adjusting the initial position of the brake block 41; the drive device 42 is mounted on the brake block adjustment assembly 43. Fine adjustment via the rocker wheel 432 and the lead screw and nut pair 431 allows the operator to precisely pre-set the gap between the brake block 41 and the wheelset 21, ensuring that the brake block can effectively clamp the wheelset 21 with optimal stroke and force when the electric push rod is activated, achieving a balance between rapid response and effective braking.

[0053] Furthermore, the drive device 42 is an electric push rod.

[0054] like Figure 5 As shown, the brake block adjustment assembly 43 further includes a lead screw and nut pair 431, a rocker wheel 432 connected to the lead screw, and an adjustment moving plate 433 on which the drive device 42 is mounted; rotating the rocker wheel 432 can drive the adjustment moving plate 433 to move, so as to adjust the initial distance between the brake block and the side of the wheelset 21.

[0055] Furthermore, the servo motor 37 is connected to a PLC control system, and the signal output terminal of the weighing sensor 34 is connected to an industrial computer. The PLC control system can control the synchronous lifting and lowering of the four weighing units 3 in the two sets of equipment, and the industrial computer is used to collect data from the four weighing sensors 34 and calculate the vehicle weight and center of gravity position. This automated control system is the key to realizing the core advantages of this invention. It can not only control the absolute synchronous lifting and lowering of the four lifting points of the two sets of equipment, avoiding the torsion of the vehicle structure due to asynchronous lifting, but also automatically collect data and calculate the center of gravity, completely eliminating human operation errors and greatly improving the accuracy, reliability and efficiency of measurement results.

[0056] Furthermore, the frame body 1 is provided with scale markings to indicate the installation position of the weighing unit 3. The scale markings on the frame body 1 provide operators with a clear visual reference, making the spacing adjustment of the weighing unit 3 quick, intuitive, and accurate. This significantly reduces the reliance on other measuring tools and the time spent on repeated measurements during the adjustment process, thus improving the efficiency of preparation work.

[0057] The working principle of this application is as follows:

[0058] The operator controls two independent weighing devices, which are moved to the underside of the rail vehicle body via their respective lateral drive mechanisms 2 (wheelsets 21 driven by servo motors 37 travel on the track). Based on the center distance of the bogies of the vehicle model, the two devices are precisely positioned directly below the expected weighing support points at the front and rear of the vehicle body.

[0059] Based on the vehicle width and referring to the scale markings on the main frame 1, loosen the adjusting pressure plate 39, slide the weighing unit 3 laterally to the appropriate position, and then tighten it again to ensure that the support points of the four weighing units 3 are aligned with the vehicle support structure. After the equipment is positioned, activate the braking device 4. Adjust the brake block adjusting assembly 43 using the rocker wheel 432 to bring the brake block close to the side of the wheelset 21, and then activate the electric push rod to drive the brake block to press firmly against the wheelset 21, preventing any movement of the equipment during the weighing process and ensuring the stability of the measurement reference.

[0060] The operator issues commands through the PLC control system, which synchronously controls the operation of four servo motors 37 across two sets of equipment. The servo motors 37 increase torque via reducers 36, driving the screw jack 35 to rotate. This smoothly and synchronously lifts the lifting plate 33 and its supporting pads 38 until they contact the vehicle's support surface and continue lifting, thus raising the entire vehicle away from the process support. During the lifting process, each load cell 34 monitors the pressure changes it experiences in real time and transmits the pressure signal to the industrial control computer.

[0061] The industrial control computer synchronously receives pressure data from four weighing sensors 34. Based on the four-point weighing principle, the software system automatically performs calculations: adding the pressure values ​​of the four points to obtain the total weight of the vehicle body; and then, based on the pressure values ​​of each sensor and their precise coordinate positions under the vehicle body, calculating the precise position of the vehicle's center of gravity in three-dimensional space.

[0062] After weighing is completed, the PLC control system controls all servo motors 37 to synchronously reverse, driving the screw jack 35 to descend and smoothly lower the vehicle back onto the process support. Then, the locking mechanism 4 is released, allowing the equipment to be moved away for the next set of operations.

[0063] The embodiments described above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make several improvements and substitutions without departing from the technical principles of this application, and these improvements and substitutions should also be considered within the scope of protection of this application.

Claims

1. A weighing device for a rail vehicle body, characterized in that, include: A frame body; A lateral drive mechanism is disposed at the bottom of the frame body for driving the device to move independently. The lateral drive mechanism includes a wheelset and a track that cooperates with the wheelset. Two weighing units are arranged side by side on the upper surface of the vehicle frame body; each weighing unit includes a mounting base, a guide support frame, a lifting plate, a weighing sensor, a screw jack, a reducer, and a servo motor. The mounting base is fixed to the vehicle frame body, the guide support frame is mounted on the mounting base, the lifting plate is movably mounted on the guide support frame, the weighing sensor is located between the lifting plate and the screw jack, the screw jack is connected to the output end of the reducer, and the servo motor is connected to the input end of the reducer to drive the lifting plate to move up and down; The two sets of vehicle body weighing devices can be used separately and in combination, with their four weighing units forming support points for weighing the four corners of the vehicle body.

2. The rail vehicle body weighing device according to claim 1, characterized in that: The surface of the lifting plate is provided with support pads.

3. The rail vehicle body weighing device according to claim 1, characterized in that: The weighing unit is mounted on the frame body via an adjusting pressure plate. The lateral distance between the two weighing units on the frame body can be adjusted by loosening the adjusting pressure plate.

4. A weighing device for a rail vehicle body according to claim 3, characterized in that: The bottom of the mounting base is provided with an outwardly extending edge, and the adjusting pressure plate presses against the upper surface of the extending edge and is connected to the frame body by screws.

5. A weighing device for a rail vehicle body according to claim 1, characterized in that: A braking device is provided on the main body of the frame corresponding to the position of the wheelset, for braking and locking the wheelset.

6. A weighing device for a rail vehicle body according to claim 5, characterized in that: The braking device includes a brake block, a drive device for driving the brake block to move, and a brake block adjustment assembly for adjusting the initial position of the brake block; the drive device is mounted on the brake block adjustment assembly.

7. A weighing device for a rail vehicle body according to claim 6, characterized in that: The driving device is an electric push rod.

8. A weighing device for a rail vehicle body according to claim 6, characterized in that: The brake block adjustment assembly includes a lead screw and nut pair, a rocker wheel connected to the lead screw, and an adjustment moving plate on which the drive device is mounted; rotating the rocker wheel can drive the adjustment moving plate to move, thereby adjusting the initial distance between the brake block and the side of the wheelset.

9. A weighing device for a rail vehicle body according to claim 1, characterized in that: The servo motor is connected to a PLC control system, and the signal output terminal of the weighing sensor is connected to an industrial computer. The PLC control system can control the synchronous lifting and lowering of the four weighing units in the two sets of equipment. The industrial computer is used to collect data from the four weighing sensors and calculate the vehicle weight and center of gravity position.

10. A weighing device for a rail vehicle body according to claim 1, characterized in that: The frame body is provided with scale markings to indicate the installation position of the weighing unit.

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