Modular chassis assembling device for railway freight container flat car

Abstract

A kind of modular chassis set pair device for railway freight container flatcar, belong to railway container flatcar chassis assembly technical field, including positioning plate, the positioning plate is fixed to the lock box bottom of chassis assembly tire type, detachably connected with positioning rod on the positioning plate, positioning block that can move up and down along positioning rod is sleeved on the positioning rod, the distance from the outer wall of positioning block to the inner wall of lock box is 1mm.In the utility model, the size measurement of lock seat length, width and diagonal line is cancelled, the assembly efficiency and assembly accuracy are greatly improved, the labor intensity of operator is effectively reduced, and the skill level of operator has little effect on set pair result.

Description

Technical Field

[0001] This utility model belongs to the technical field of railway container flatcar chassis assembly, and relates to a modular assembly device for container flatcars, particularly a modular chassis assembly device for railway freight car container flatcars. Background Technology

[0002] In existing technologies, the following two methods are mainly used when assembling components such as crossbeams and central crossbeams on the underframe of railway container flatcars:

[0003] Option 1: The lock seats are directly welded to the crossbeams, central crossbeam, and end beams. The level is adjusted using the support brackets under each beam on the base frame assembly form. Then, a measuring tape and square are used to measure and adjust the dimensions of each lock seat hole. The advantage is that the assembly dimensions can be guaranteed. The disadvantages are lower production efficiency, more measurements, a higher risk of confusion or errors in dimension recording, and higher requirements for operator skills, patience, and logical analysis. Achieving a production output of 4 units per shift requires overtime.

[0004] Option 2: The lock seat is not welded to the crossbeam, central crossbeam, or end beam. The base frame assembly only assembles the crossbeam, central crossbeam, and end beam, while the lock seat is assembled separately in a later process. The advantage is that assembly dimensional requirements can be guaranteed. The disadvantages are that it requires more space and more workers than Option 1, and is also prone to dimensional errors. It demands high levels of operator skill, patience, and logical analysis. A dual-station operation mode can achieve a production capacity of 4 units per shift, but given the current personnel and space constraints, the required production factors cannot be met.

[0005] Both schemes employ a process of positioning the locking mechanism by first-time contact with the edge of the cover plate under each beam. For each vehicle, the center length, width, and diagonal dimensions of the locking seats for components such as the crossbeams and central crossbeams must be measured, and secondary or multiple fine-tuning adjustments are required to ensure smooth assembly of the locking device later. However, when the types of containers used increase and the loading conditions become more complex, the number of measurements increases (from 18 sets of data to 36 sets), and all data are interconnected and mutually influential, making adjustments difficult. If measurement errors occur, subsequent rework is extremely difficult, and dimensional measurement severely impacts production efficiency.

[0006] Therefore, it is urgent to explore and research a new method for positioning and assembling lock seats that is adapted to the current situation. Summary of the Invention

[0007] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a modular underframe assembly device for railway freight car container flatcars, which solves the technical problem in the prior art where the positioning and assembly of the lock seat are greatly affected by the operator's skill level, resulting in errors during the lock seat assembly process, causing tolerance accumulation, and thus making it impossible to smoothly adjust the center deviation of the lock seat, thereby affecting production efficiency.

[0008] To achieve the above and other related objectives, this utility model provides a modular underframe assembly device for railway freight car container flatcars, including a positioning plate. The positioning plate is fixed to the bottom of the lock box of the underframe assembly form. A positioning rod is detachably connected to the positioning plate. A positioning block that can move up and down along the positioning rod is sleeved on the positioning rod. The distance from the outer wall of the positioning block to the inner wall of the lock box is 1mm.

[0009] Preferably, in any of the above embodiments, the positioning plate is welded to the bottom of the lock box of the base frame assembly mold, and the vertical center of the positioning rod is on the same straight line as the center of the lock box.

[0010] Preferably, in any of the above embodiments, the positioning plate has a positioning hole, the bottom of the positioning rod has an external thread, and the positioning rod and the positioning plate are threaded together.

[0011] In any of the above embodiments, it is preferred that the top of the positioning block is connected to two lifting rings, and the two lifting rings are symmetrically arranged about the vertical center line of the positioning rod.

[0012] Preferably, in any of the above embodiments, a positioning module is installed on the positioning rod, and a distance sensor is installed in the middle of each of the four side walls of the positioning block. Each positioning module is electrically connected to the corresponding four distance sensors, and the positioning module and the distance sensors are electrically connected to the display terminal respectively.

[0013] In any of the above embodiments, it is preferred that the four side walls of the positioning block are recessed inward to form mounting holes, the distance sensor is installed in the mounting holes, and the emission point of the distance sensor is on the same vertical plane as the side wall of the positioning block.

[0014] Preferably, in any of the above embodiments, an alarm is also installed on the positioning rod, and the alarm is electrically connected to the display terminal.

[0015] As described above, the modular underframe assembly device for railway freight car container flatcars of this utility model has the following features:

[0016] Beneficial effects:

[0017] 1. In this utility model, the measurement of the length, width and diagonal of the lock seat is eliminated, which greatly improves the assembly efficiency and assembly accuracy, effectively reduces the labor intensity of the operator, and the operator's skill level has little impact on the assembly result.

[0018] 2. In this utility model, the device is simple to operate and has low skill requirements for the operator.

[0019] 3. In this utility model, the device has low cost for tire modification and can effectively reduce production costs.

[0020] 4. The device in this utility model has wide applicability, and is not only applicable to the assembly of telescopic rotary locks, but also to TFAD type fully automatic rotary locks. Attached Figure Description

[0021] Figure 1 The diagram shown is a structural schematic of this utility model.

[0022] Figure 2 The diagram shown is a structural schematic of the present invention during positioning and assembly.

[0023] Component designation explanation

[0024] 1-Base frame assembly jig; 2-Lock box; 3-Positioning plate; 4-Positioning rod; 5-Positioning block; 6-Mounting hole; 7-Positioning module; 8-Distance sensor; 9-Alarm; 10-Lifting ring. Detailed Implementation

[0025] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0026] Please see Figures 1 to 2 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0027] Please see Figure 1-2This utility model provides a modular underframe assembly device for railway freight car container flatcars, including a positioning plate 3 welded to the bottom of the upper beam, crossbeam, and central crossbeam lock seat of the underframe assembly jig 1. A positioning rod 4 with a diameter of 25mm is detachably connected to the positioning plate 3. A positioning block 5, which can move up and down along the positioning rod 4, is fitted onto the positioning rod 4 to serve as a stop for assembling and positioning each beam. The size of the positioning block 5 is 2mm larger than the outer dimensions of the rotary lock, that is, the distance from the outer wall of the positioning block 5 to the inner wall of the lock box 2 is 1mm, thus simulating the actual working state of the rotary lock in the inner cavity of the lock seat. Simultaneously, the vertical center of the positioning rod 4 is collinear with the center of the lock box 2, thereby ensuring that the assembly datum coincides with the product design datum and avoiding quality problems caused by inconsistent datums.

[0028] In this embodiment, the method for determining the position of the positioning plate 3 is as follows:

[0029] On the base frame assembly of tire type 1, the original upper and lower center plate support surfaces of the tire type are used as the reference lines for positioning plates 3. Positioning plates 3 are installed according to the positions from the center of the upper and lower center surfaces to the center of all lock seats as shown in the drawings. During installation, all positioning plates 3 are at the same horizontal height and each positioning plate 3 is horizontal.

[0030] In this embodiment, the specific working method of the pairing device is as follows:

[0031] The locking seats of each beam are directly welded to the end beams, cross beams, and main cross beams. A centerline and a center plate lateral positioning position are set on the underframe assembly jig 1. The centerline facilitates the alignment of the center beam's center with the jig's center, while the center plate lateral positioning position restricts the center beam's lateral displacement within the vehicle body. After the center beam is hoisted to the platform, its lateral centerline is located and aligned with the jig's centerline. The center beam is then locked. After each beam is hoisted to its corresponding position, positioning rods 4 are installed on positioning plates 3. Positioning blocks 5 are then installed on positioning rods 4. The longitudinal and lateral positions of each beam are adjusted so that the positioning blocks 5 are embedded in the locking boxes 2 of each beam and can slide easily up and down within them. A spirit level is used to ensure the center beam and the top planes of the side beams are at the same horizontal level, and that each beam is longitudinally level. After successful adjustment, tack welding is performed. After all the end beams, cross beams, main cross beams, and the front welds of the center beam are completed, the locking seat positioning blocks 5 are removed, and positioning rods 4 are unscrewed. The underframe can then be hoisted to the next work station.

[0032] In this embodiment, the method for adjusting the upper planes of the middle beam and the two side beams to be at the same horizontal level is as follows:

[0033] By placing a large straightedge (made of steel or aluminum) on the surface of the middle beam and the side beams, use a spirit level or frame level on the straightedge to measure whether the surface of the three beams is level.

[0034] As a further description of the above embodiment, the detachable connection method between the positioning rod 4 and the positioning plate 3 is that a positioning hole with internal thread is opened on the positioning plate 3, and an external thread is opened at the bottom of the positioning rod 4, and the positioning rod 4 and the positioning plate 3 are threadedly connected.

[0035] As a further description of the above embodiment, after the welding of all end beams, cross beams, main cross beams and middle beams is completed, the positioning block 5 needs to be removed. Therefore, in order to facilitate the removal of the positioning block 5, two lifting rings 10 are connected to the top of the positioning block 5 in this embodiment. When it is necessary to remove the positioning block 5, simply hook the lifting rings 10 and lift it up.

[0036] In this embodiment, the two lifting rings 10 are symmetrically arranged about the vertical center line of the positioning rod 4, which can ensure the force balance during the removal of the positioning block 5 and prevent the positioning block 5 from tilting and getting stuck on the inner wall of the lock box 2, making it inconvenient to remove.

[0037] As a further description of the above embodiment, a reference positioning module 7 is installed on the top or center of the positioning rod 4, and distance sensors 8 are installed in the middle of the four side walls of the positioning block 5. Each positioning module 7 is electrically connected to the corresponding four distance sensors 8. At the same time, the positioning module 7 and the distance sensors 8 are electrically connected to the display terminal. Therefore, the positions of all lock seats on the entire chassis assembly jig 1 are displayed on the display terminal. Moreover, the setting of the distance sensors 8 can display the dimensions between the positioning block 5 and the lock box 2 during the installation and debugging of each beam, making it convenient for the staff to intuitively observe the distance between the positioning block 5 and the lock box 2. This avoids the original measurement with a measuring tape, greatly saves labor, improves the automation and accuracy of measurement, and reduces the dependence on the skill level of the operators.

[0038] To prevent the distance sensor 8 from affecting the positioning block 5 and to ensure that the positioning block 5 can move freely within the lock box 2, in this embodiment, the distance sensor 8 is disposed within the positioning block 5. Specifically, mounting holes 6 are formed by recessing the center of the four side walls of the positioning block 5, and the distance sensor 8 is installed within the mounting holes 6.

[0039] Meanwhile, in order to ensure that the distance measured by the emission point of the distance sensor 8 is the distance from the side wall of the positioning block 5 to the inner wall of the lock box 2, so as to facilitate intuitive understanding of the distance between the positioning block 5 and the inner wall of the lock box 2, in this embodiment, the reference plane of the distance sensor 8 and the outer wall of the positioning block 5 are on the same vertical plane, that is, the emission point of the distance sensor 8 and the side wall of the positioning block 5 are on the same vertical plane.

[0040] In this embodiment, an alarm 9 is also installed on the positioning rod 4, and the alarm 9 is electrically connected to the display terminal. When the data measured by the distance sensor 8 is greater than 1mm, the alarm 9 on the corresponding positioning rod 4 sounds, and the staff can quickly locate and make corresponding adjustments based on the alarm, thereby effectively improving work efficiency.

[0041] Therefore, this component-based approach not only allows for precise assembly of the lock seats "one vehicle at a time" during assembly, but also enables data measurement and statistics "one vehicle at a time." The positioning module 7 and distance sensor 8 transmit the measured data to the display terminal in a timely manner, and a complete database is stored on the display terminal and added to the vehicle's electronic dimension and quality tracking card, ultimately forming a comprehensive and accurate large database for this vehicle model.

[0042] In this embodiment, the electrical connection between the positioning module 7 and the distance sensor 8, and the electrical connection between the positioning module 7, the distance sensor 8, the alarm 9, and the display terminal are all existing technologies, and therefore will not be described in this embodiment.

[0043] In summary, the assembly method of this application utilizes the "projection principle." Through the horizontal positioning plate 3, the vertical positioning rod 4, and the positioning block 5 with only a 1mm assembly gap to the lock box 2, the standard lock seat center on the jig is projected onto the actual height of each beam. This facilitates positioning the lock seat center at the standard height of each beam, ensuring complete alignment between the actual on-site assembly datum and the design datum. This avoids numerous problems caused by inconsistent positioning datums. The operator only needs to ensure that the positioning block 5 can easily slide up and down inside the lock box 2 to adjust the three-beam difference and longitudinal levelness of each beam. The dimensional measurements involved are simple and intuitive, eliminating the need for memorizing, planning (the positioning block 5 already restricts the longitudinal and lateral positions of the lock seats on each beam), or logical analysis (how to use the surrounding lock seat dimensions for uniform adjustment when the measured lock seat dimensions deviate) of the 36 associated dimensions of the lock seat. Therefore, the requirements for the operator's skill level, patience, and logical analysis ability are greatly reduced, and the operator's labor intensity is also significantly reduced.

[0044] Before this assembly method, the chassis assembly capacity was 0.75 units / day. After implementing the new assembly method, the chassis assembly capacity reached 4 units / day during mass production, significantly improving production efficiency.

[0045] Furthermore, due to the improved precision in the assembly dimensions of the lock seats for each beam, the subsequent lock seat cover plate assembly station can directly assemble the lock seat cover plates based on the position of lock box 2. This has improved the assembly efficiency of the lock seat cover plates and eliminated the need for multiple cutting and adjustment of the cover plate assembly position due to large assembly deviations in lock box 2. After implementing the new lock seat positioning and assembly method, the first-pass yield rate of the box-drop test increased to 100%, achieving the expected results.

[0046] In summary, this invention eliminates the need to measure the length, width, and diagonal of the lock seat, significantly improving assembly efficiency and precision, effectively reducing the operator's workload, and minimizing the impact of the operator's skill level on the assembly result. Therefore, this invention effectively overcomes the various shortcomings of existing technologies and possesses high industrial applicability.

[0047] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A modular underframe assembly device for railway freight car container flatcars, characterized in that: The system includes a positioning plate (3), which is fixed to the bottom of the lock box (2) of the base frame assembly jig (1). A positioning rod (4) is detachably connected to the positioning plate (3). A positioning block (5) that can move up and down along the positioning rod (4) is sleeved on the positioning rod (4). The distance from the outer wall of the positioning block (5) to the inner wall of the lock box (2) is 1 mm.

2. The modular underframe assembly device for railway freight car container flatcars according to claim 1, characterized in that: The positioning plate (3) is welded to the bottom of the lock box (2) of the base frame assembly jig (1), and the vertical center of the positioning rod (4) is on the same straight line as the center of the lock box (2).

3. The modular underframe assembly device for railway freight car container flatcars according to claim 1, characterized in that: The positioning plate (3) has a positioning hole, and the bottom of the positioning rod (4) has an external thread. The positioning rod (4) and the positioning plate (3) are threaded together.

4. The modular underframe assembly device for railway freight car container flatcars according to claim 1, characterized in that: The top of the positioning block (5) is connected to two lifting rings (10), which are symmetrically arranged about the vertical center line of the positioning rod (4).

5. The modular underframe assembly device for railway freight car container flatcars according to claim 1, characterized in that: A positioning module (7) is installed on the positioning rod (4), and a distance sensor (8) is installed in the middle of the four side walls of the positioning block (5). Each positioning module (7) is electrically connected to the corresponding four distance sensors (8), and the positioning module (7) and the distance sensors (8) are electrically connected to the display terminal respectively.

6. The modular underframe assembly device for railway freight car container flatcars according to claim 5, characterized in that: The four side walls of the positioning block (5) are recessed inward to form mounting holes (6), and the distance sensor (8) is installed in the mounting holes (6). The emission point of the distance sensor (8) and the side wall of the positioning block (5) are on the same vertical plane.

7. The modular underframe assembly device for railway freight car container flatcars according to claim 5, characterized in that: An alarm (9) is also installed on the positioning rod (4), and the alarm (9) is electrically connected to the display terminal.

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