Laser height fixing device for subway vehicle underframe floor mounting seat

Abstract

The utility model relates to subway vehicle manufacturing technical field, and disclose a kind of subway vehicle chassis floor mounting seat laser height-fixing device, the device includes inverted recess frame, mobile support, level, six groups of laser range finder and display screen.Inverted recess frame two ends are equipped with mobile support with locking roller, and automatically adjust level by three groups of electric telescopic link and universal joint;Level cooperates controller real-time correction inclination;Six groups of laser range finder equidistant arrangement, synchronous measurement floor height and display data;Equipped with intelligent ink-jet printer is positioned mark by electric push rod and pressure sensor automatically.Adopt wireless charging lithium battery power supply, single time can measure six installation points, efficiency improves 6 times, precision reaches ±0.1 millimeter, solve the problem that manual measurement speed is slow, error-prone, effectively improve floor installation flatness.

Description

Technical Field

[0001] This utility model relates to the field of subway vehicle manufacturing technology, specifically a laser height-fixing device for a subway vehicle underframe floor mounting base. Background Technology

[0002] In the manufacturing process of subway vehicles, the precise height and installation of the underframe floor mounting base is crucial to ensuring the flatness of the floor and the overall performance of the vehicle. Traditionally, this process mainly relies on manual measurement using an inverted concave fixture with a stopper block. Specifically, the two ends of the inverted concave fixture are placed on the side beams of the car body underframe. By visually observing, a stopper block of appropriate thickness is selected and placed in the gap between the fixture and the mounting base. The reading protruding from the stopper block indicates the thickness of the mounting pad at that location.

[0003] However, this method has many limitations.

[0004] There are numerous mounting brackets on the underframe of subway cars, typically exceeding 230. Using the traditional manual block measurement method, each mounting bracket needs to be measured individually. Operators need to repeatedly pick up and drop the blocks and make visual judgments, a time-consuming process. This low work efficiency slows down the entire installation process, increasing manufacturing costs and time.

[0005] Furthermore, human error is significant. Visually judging the fit between the plug and the tooling / mounting seat is easily affected by the operator's subjective factors, such as visual fatigue or inconsistent judgment standards. This makes it difficult to guarantee the accuracy of the measurement results, which in turn affects the installation accuracy of the mounting seat and the overall performance of the subway vehicle.

[0006] Therefore, we propose a laser height-fixing device for the mounting base of a subway vehicle chassis floor to solve the problems mentioned above. Utility Model Content

[0007] This utility model provides a laser height-fixing device for subway vehicle underframe floor mounting seats, which can solve the problem that the height-fixing process of subway vehicle underframe floor mounting seats mainly relies on manual measurement using inverted concave tooling and stoppers. Each mounting seat needs to be measured individually, and the operator needs to repeatedly pick up and drop the stoppers and make visual judgments, resulting in time-consuming and low-precision operation.

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0009] A laser height-fixing device for a subway vehicle underframe floor mounting base includes an inverted bracket. Adjustable support mechanisms for movable support are installed at both ends of the inverted bracket. An inclination measuring instrument is installed on the upper part of the inverted bracket, and the inclination measuring instrument is set parallel to the upper surface of the inverted bracket. A laser rangefinder for measuring the height of the underframe surface is installed on the inverted bracket, and a digital display screen is fixedly installed on one side of the inverted bracket. The digital display screen is electrically connected to the laser rangefinder.

[0010] Preferably, the inverted bracket includes a horizontal square tube and support rods fixedly connected to both ends, with the support rods fixedly connected to the ends of the horizontal square tube.

[0011] Preferably, the adjustable support mechanism includes a base, an electric telescopic rod, and a double universal joint shaft connector. An inclination measuring instrument is installed on the base, the double universal joint shaft connector connects the base and the electric telescopic rod, and a top plate is provided at the end of the electric telescopic rod away from the base. The electric telescopic rod and the top plate are connected by the double universal joint shaft connector.

[0012] Preferably, the electric telescopic poles are arranged in three groups in a circular array, and a PLC controller is installed on the inverted frame. The PLC controller is electrically connected to the electric telescopic poles and the tilt measuring instrument.

[0013] Preferably, the marking mechanism includes an intelligent inkjet printer and an electric actuator, with the telescopic end of the electric actuator fixedly connected to the intelligent inkjet printer.

[0014] Preferably, the end of the electric actuator away from the intelligent inkjet printer is fixedly connected to the inverted bracket, and a pressure sensor is installed between the electric actuator and the intelligent inkjet printer.

[0015] Preferably, there are six groups of laser rangefinders, which are linearly and equidistantly distributed.

[0016] Preferably, each set of laser rangefinders is equipped with an intelligent inkjet printer, and the two are arranged coaxially in a straight line along the moving direction of the inverted frame.

[0017] Preferably, the adjustable support mechanism has rollers installed at the bottom of its base, and the rollers have integrated self-locking brake devices.

[0018] Preferably, a detachable lithium battery pack is embedded inside the inverted recessed frame. The lithium battery pack, PLC controller, laser rangefinder, tilt meter and digital display screen form a power supply circuit. A wireless charging receiver module that matches the lithium battery pack is also provided on the side wall of the inverted recessed frame.

[0019] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0020] This utility model discloses a laser height-fixing device for subway vehicle underframe floor mounting, achieving efficient and accurate measurement and installation through several innovative designs. The device employs an inverted bracket structure with adjustable support mechanisms at both ends, allowing for rapid movement to the target position and locking. Combined with a built-in tilt measuring instrument and an automatic adjustment system, it monitors and dynamically adjusts the device's level in real time, effectively eliminating the influence of uneven ground or operational errors on the measurement benchmark. Six equidistantly distributed laser rangefinders work simultaneously, completing height measurements at six installation points in one go. The data is displayed intuitively on a digital screen, avoiding the subjective errors of traditional manual visual inspection. The accompanying intelligent inkjet printer automatically marks the measurement results under the drive of an electric push rod, and the inkjet pressure is precisely controlled by a pressure sensor, ensuring clear markings while preventing damage to the vehicle body surface. The device's multi-angle adjustment design, using an electric telescopic rod and double universal joint shaft connectors, allows for flexible adaptation to complex workshop environments, ensuring measurement stability. Furthermore, the power supply solution, featuring a detachable lithium battery pack and a wireless charging module, balances equipment endurance with ease of workshop operation. Compared to the traditional manual plug measurement method, this device improves the efficiency of a single operation by about 6 times and the measurement accuracy reaches ±0.1 mm. It fundamentally solves the problems of low efficiency, error accumulation and easy marking errors in manual measurement, and significantly improves the flatness and consistency of subway vehicle floor installation. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall front structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the adjustable support mechanism of this utility model;

[0023] Figure 3 This is a schematic diagram of the bottom mounting structure of the device of this utility model;

[0024] Figure 4 This is a schematic diagram of the electric actuator and intelligent inkjet printer of this utility model.

[0025] The components include: 1. Inverted bracket; 2. Adjustable support mechanism; 3. Inclinometer; 4. Laser rangefinder; 5. Digital display screen; 6. Electric push rod; 7. Intelligent inkjet printer; 21. Base; 22. Top plate; 23. Electric telescopic rod; 24. Double universal joint shaft connector; 25. Roller. Detailed Implementation

[0026] The specific embodiments of this utility model are described in detail below, but it should be understood that the scope of protection of this utility model is not limited to the specific embodiments.

[0027] Example 1:

[0028] Please see Figure 1-4 This utility model provides a technical solution:

[0029] A laser height-fixing device for a subway vehicle underframe floor mounting base includes an inverted bracket 1. Adjustable support mechanisms 2 for movable support are installed at both ends of the inverted bracket 1. An inclination measuring instrument 3 is installed on the upper part of the inverted bracket 1, and the inclination measuring instrument 3 is set parallel to the upper surface of the inverted bracket 1. A laser rangefinder 4 for measuring the height of the underframe surface is installed on the inverted bracket 1, and a digital display screen 5 is fixedly installed on one side of the inverted bracket 1. The digital display screen 5 is electrically connected to the laser rangefinder 4.

[0030] The marking mechanism includes an intelligent inkjet printer 7 and an electric push rod 6. The telescopic end of the electric push rod 6 is fixedly connected to the intelligent inkjet printer 7. The end of the electric push rod 6 away from the intelligent inkjet printer 7 is fixedly connected to the inverted bracket 1. A pressure sensor is installed between the electric push rod 6 and the intelligent inkjet printer 7. Six sets of laser rangefinders 4 are arranged linearly and equidistantly. Each set of laser rangefinders 4 is equipped with an intelligent inkjet printer 7, and the two are arranged coaxially in a straight line along the moving direction of the inverted bracket 1.

[0031] In the above scheme, the inverted bracket 1 achieves rapid movement and precise positioning through adjustable support mechanisms 2 installed at both ends. Once the inverted bracket 1 moves to the target mounting position, the horizontal state of the upper surface of the inverted bracket 1 is monitored in real time by an inclinometer 3. If tilting is present, the PLC controller dynamically compensates for the tilt angle by adjusting the lengths of three sets of circumferentially distributed electric telescopic rods 23, ensuring that the inverted bracket 1 remains in a horizontal reference state. This process eliminates measurement reference deviations caused by unevenness of the vehicle body chassis surface or operational errors.

[0032] Furthermore, six sets of laser rangefinders 4 are linearly and equidistantly distributed on the inverted bracket 1, and simultaneously emit laser beams to the surface of the vehicle chassis. By calculating the laser reflection time difference, the distance between the chassis surface and the lower surface of the inverted bracket 1 can be accurately measured.

[0033] Furthermore, the measurement data is transmitted to the digital display screen 5 in real time, allowing operators to directly read the height values ​​of the six measurement points without the need for repeated manual placement of blocks or visual judgment, thus significantly reducing the measurement time for a single mounting base.

[0034] Each laser rangefinder 4 is equipped with an intelligent inkjet printer 7, which, driven by an electric push rod 6, automatically moves to the target position to perform inkjet marking based on the measurement results.

[0035] A pressure sensor monitors the contact pressure between the inkjet printer and the chassis surface in real time, ensuring clear markings without damaging the surface. The inkjet content can include height values ​​or mounting bracket numbers, ensuring a one-to-one correspondence between measured data and the vehicle chassis position, avoiding confusion during subsequent installation.

[0036] Traditional manual block measurement requires repeated operation on each mounting base, which is extremely time-consuming. This device, through the movement of rollers 25, simultaneous measurement by multiple laser rangefinders 4, and real-time feedback from the digital display screen 5, enables a single measurement to cover six mounting bases, improving overall efficiency by approximately 6 times.

[0037] Furthermore, the laser rangefinder 4 achieves a measurement accuracy of ±0.1mm, far exceeding that of traditional step-by-step adjustment using plug blocks. The closed-loop adjustment system of the tilt measuring instrument 3 and the PLC controller further eliminates the cumulative error introduced by the tooling tilt, ensuring a stable measurement benchmark and improving the quality of floor leveling. Additionally, the automated marking by the intelligent inkjet printer 7 replaces manual recording, avoiding issues of missing or misaligned markings.

[0038] Example 2:

[0039] Please see Figure 1-4 Furthermore, in conjunction with Embodiment 1, the inverted bracket 1 includes a horizontal square tube and support rods fixedly connected to both ends, with the support rods fixedly connected to the ends of the horizontal square tube. The adjustable support mechanism 2 includes a base 21, an electric telescopic rod 23, and a double universal joint shaft connector 24. An inclination measuring instrument 3 is installed on the base 21. The double universal joint shaft connector 24 connects the base 21 and the electric telescopic rod 23. A top plate 22 is provided at the end of the electric telescopic rod 23 away from the base 21, and the electric telescopic rod 23 and the top plate 22 are connected through the double universal joint shaft connector 24. Three sets of electric telescopic rods 23 are arranged in a circumferential array. A PLC controller is installed on the inverted bracket 1, and the PLC controller is electrically connected to the electric telescopic rod 23 and the inclination measuring instrument 3, respectively. Rollers 25 are installed at the bottom of the base 21 of the adjustable support mechanism 2, and a self-locking brake device is integrated on the rollers 25.

[0040] The inverted recessed frame 1 is internally equipped with a detachable lithium battery pack. The lithium battery pack, PLC controller, laser rangefinder 4, tilt meter 3 and digital display screen 5 form a power supply circuit. The side wall of the inverted recessed frame 1 is also equipped with a wireless charging receiver module that matches the lithium battery pack.

[0041] In the above scheme, in Embodiment 2, based on Embodiment 1, the inverted concave frame 1 is a rigid frame composed of a horizontal square tube and two end supports. The supports are fixedly connected to the horizontal square tube to ensure the stability of the overall structure. In the adjustable support mechanism 2, three sets of circumferentially arrayed electric telescopic rods 23 are provided between the base 21 and the top plate 22. The electric telescopic rods 23 are connected to the base 21 and the top plate 22 through double universal joint shaft joints 24 to form a multi-degree-of-freedom adjustment system.

[0042] When the tilt measuring instrument 3 detects that the inverted bracket 1 is tilted, the PLC controller independently adjusts the length of each electric telescopic rod 23 according to the real-time data. Through the flexible connection of the double universal joint shaft joint 24, the offset in different directions is compensated, and the three-dimensional dynamic leveling of the inverted bracket 1 is realized.

[0043] This design not only improves the adjustment response speed, but also avoids the problem of mechanical stress concentration caused by single-point adjustment.

[0044] Furthermore, the rollers 25 at both ends of the inverted bracket 1 are placed on the side beams of the vehicle body frame, with the side beams of the vehicle body serving as the horizontal reference by default. The self-locking brake device integrated in the rollers 25 allows the device to quickly slide into the target area during movement. After reaching the measurement position, the rollers 25 are locked by braking to ensure the absolute stillness of the device during the measurement process and to guarantee the measurement stability of the laser rangefinder 4.

[0045] The PLC controller, laser rangefinder 4, tilt meter 3, and digital display screen 5 are powered by a detachable lithium battery pack, eliminating reliance on external power sources and making it particularly suitable for the complex environment of subway vehicle manufacturing workshops. The wireless charging receiver module on the side wall supports contactless charging, and can be automatically recharged via a wireless charging station when the device is returned to its original position, reducing the frequency of manual battery replacement and enabling continuous operation around the clock.

[0046] The working principle of the laser height-fixing device for the subway car underframe floor mounting base can be summarized as the following continuous process:

[0047] The working principle of the laser height-fixing device for the subway car underframe floor mounting base:

[0048] The operator moves the device to the target area of ​​the vehicle chassis via the adjustable support mechanism 2. The rollers 25 at the bottom of the adjustable support mechanism 2 slide along the side beam of the chassis, which is used as the horizontal reference by default. After reaching the measurement position, the self-locking brake device of the rollers 25 is activated to lock the device position to ensure stability during the measurement process and avoid displacement errors.

[0049] The tilt measuring instrument 3 on the inverted bracket 1 monitors the horizontal state of the upper surface in real time. If tilt is detected, the PLC controller immediately initiates closed-loop adjustment: based on the tilt data, it independently controls the extension and retraction of three sets of circumferentially distributed electric telescopic rods 23. Through multi-degree-of-freedom compensation via the double universal joint shaft joint 24, it dynamically adjusts the spatial angle between the base 21 and the top plate 22, eliminating tilt caused by unevenness of the base surface or operational deviation. This process achieves three-dimensional dynamic leveling of the inverted bracket 1, ensuring stable measurement reference and avoiding mechanical stress concentration.

[0050] After leveling, the six sets of laser rangefinders 4 on the inverted bracket 1 synchronously emit laser beams to the surface of the vehicle chassis. By calculating the laser reflection time difference, the distance between the chassis surface and the lower surface of the inverted bracket 1 is accurately measured. The six sets of data are then transmitted to the digital display screen 5 in real time, allowing operators to intuitively read the height values ​​of each mounting base. This eliminates the need for traditional manual point-by-point measurement using inserts, and a single measurement covers all six points, improving efficiency by approximately six times.

[0051] Each laser rangefinder 4 corresponds to an intelligent inkjet printer 7, which, driven by an electric push rod 6, automatically moves to the target position based on the measurement results. A pressure sensor monitors the contact pressure between the inkjet printer and the base surface in real time, ensuring clear markings without damaging the surface. This system ensures a one-to-one correspondence between the printed content and the measurement data, avoiding errors and omissions caused by manual marking and achieving data traceability.

[0052] The device features a built-in removable lithium battery pack to power the PLC controller, laser rangefinder 4, tilt meter 3, and digital display screen 5, adapting to complex workshop environments. The wireless charging receiver module on the side wall of the inverted frame 1 supports automatic recharging upon return to its original position. Combined with the removable and replaceable battery design, this ensures continuous operation around the clock.

[0053] The tilt measuring instrument 3, PLC controller, and three sets of electric telescopic rods 23 form a closed-loop adjustment system to continuously monitor and compensate for offsets caused by environmental vibration or load changes, ensuring the long-term stability of the measurement benchmark and improving the leveling quality of the floor mounting base.

[0054] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A laser height-fixing device for a subway vehicle underframe floor mounting base, comprising an inverted recessed frame (1), characterized in that: The inverted bracket (1) is equipped with adjustable support mechanisms (2) for movable support at both ends. An inclination measuring instrument (3) is installed on the upper part of the inverted bracket (1). The inclination measuring instrument (3) is set parallel to the upper surface of the inverted bracket (1). A laser rangefinder (4) for measuring the height of the vehicle body frame surface is installed on the inverted bracket (1). A digital display screen (5) is fixedly installed on one side of the inverted bracket (1). The digital display screen (5) is electrically connected to the laser rangefinder (4).

2. The laser height-fixing device for a subway vehicle underframe floor mounting base according to claim 1, characterized in that: The inverted bracket (1) includes a horizontal square tube and support rods fixedly connected to its two ends, with the support rods fixedly connected to the ends of the horizontal square tube.

3. The laser height-fixing device for a subway vehicle underframe floor mounting base according to claim 1, characterized in that: The adjustable support mechanism (2) includes a base (21), an electric telescopic rod (23), and a double universal joint shaft connector (24). An inclination measuring instrument (3) is installed on the base (21). The double universal joint shaft connector (24) connects the base (21) and the electric telescopic rod (23). A top plate (22) is provided at the end of the electric telescopic rod (23) away from the base (21). The electric telescopic rod (23) and the top plate (22) are connected by the double universal joint shaft connector (24).

4. The laser height-fixing device for a subway vehicle underframe floor mounting base according to claim 3, characterized in that: The electric telescopic pole (23) is set in three groups and distributed in a circular array. A PLC controller is installed on the inverted bracket (1). The PLC controller is electrically connected to the electric telescopic pole (23) and the tilt measuring instrument (3).

5. The laser height-fixing device for a subway vehicle underframe floor mounting base according to claim 1, characterized in that: The marking mechanism includes an intelligent inkjet printer (7) and an electric push rod (6), with the telescopic end of the electric push rod (6) fixedly connected to the intelligent inkjet printer (7).

6. The laser height-fixing device for a subway vehicle underframe floor mounting base according to claim 5, characterized in that: The end of the electric push rod (6) away from the intelligent inkjet printer (7) is fixedly connected to the inverted bracket (1), and a pressure sensor is installed between the electric push rod (6) and the intelligent inkjet printer (7).

7. A laser height-fixing device for a subway vehicle underframe floor mounting base according to claim 6, characterized in that: There are six sets of laser rangefinders (4), which are linearly and equidistantly distributed.

8. A laser height-fixing device for a subway vehicle underframe floor mounting base according to claim 7, characterized in that: Each laser rangefinder (4) is equipped with an intelligent inkjet printer (7), and the two are arranged coaxially in a straight line along the moving direction of the inverted bracket (1).

9. A laser height-fixing device for a subway vehicle underframe floor mounting base according to claim 1, characterized in that: The adjustable support mechanism (2) has a roller (25) installed at the bottom of its base (21), and a self-locking brake device is integrated on the roller (25).

10. A laser height-fixing device for a subway vehicle underframe floor mounting base according to claim 4, characterized in that: The inverted bracket (1) is equipped with a detachable lithium battery pack. The lithium battery pack, PLC controller, laser rangefinder (4), tilt meter (3) and digital display screen (5) form a power supply circuit. The side wall of the inverted bracket (1) is also equipped with a wireless charging receiver module that matches the lithium battery pack.

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