Method for manufacturing a hopper car

Abstract

The application provides a manufacturing method of a hopper car, comprising the following steps: assembling a middle beam, a cross beam, a first side beam and a second side beam to obtain a car body structure; obtaining a bottom door assembly and a bottom door opening and closing mechanism in the process of obtaining the car body structure, the bottom door assembly comprising two bottom door structures, each bottom door structure comprising a bottom door body, a bottom door flap and a flap seat, and the bottom door body and the bottom door flap of the two bottom door structures being assembled respectively; connecting the first shaft support and the second shaft support with the car body structure respectively; connecting the bottom door flap of the two bottom door structures with the flap seat through a connecting pin; connecting the flap seat of the two bottom door structures with the cross beam; connecting the bottom door opening and closing mechanism with the first shaft support and the second shaft support, and connecting the bottom door opening and closing mechanism with the bottom door body of the two bottom door structures. The technical scheme of the application effectively solves the problem of low hopper car manufacturing efficiency in the related art.

Description

Technical Field

[0001] This invention relates to the field of hopper cart technology, and more specifically, to a method for manufacturing a hopper cart. Background Technology

[0002] A coal hopper car is a railway freight car used to transport coal. The bottom of the hopper car is usually funnel-shaped, with a discharge port at the bottom, allowing coal to be discharged from the bottom of the car by gravity, thus improving unloading efficiency.

[0003] In related technologies, when manufacturing a hopper car, the various parts of the car body structure are assembled first, then the various parts of the bottom door structure are assembled on the car body structure, and finally the various parts of the bottom door opening and closing mechanism are assembled on the car body structure. That is, the assembly of each structure of the hopper car needs to be carried out sequentially, resulting in low manufacturing efficiency of the hopper car. Summary of the Invention

[0004] The main objective of this invention is to provide a manufacturing method to solve the problem of low manufacturing efficiency of hopper carts in related technologies.

[0005] To achieve the above objectives, according to one aspect of the present invention, a method for manufacturing a hopper cart is provided, comprising:

[0006] The middle beam, cross beam, first side beam, and second side beam are obtained separately, and then the middle beam, cross beam, first side beam, and second side beam are assembled to obtain the vehicle body structure;

[0007] During the process of obtaining the vehicle body structure, the bottom door assembly is obtained. The bottom door assembly includes two bottom door structures. Each bottom door structure includes a bottom door body, a bottom door hinge, and a hinge seat. The bottom door bodies and bottom door hinges of the two bottom door structures are assembled separately.

[0008] During the process of obtaining the vehicle body structure, the bottom door opening and closing mechanism is obtained;

[0009] The first shaft support and the second shaft support are obtained respectively;

[0010] Connect the first axle support and the second axle support to the vehicle body structure respectively;

[0011] The bottom door hinges of the two bottom door structures are connected to the hinge seats by connecting pins;

[0012] Connect the hinge seats of the two bottom door structures to the crossbeam;

[0013] The bottom door opening and closing mechanism is connected to both the first shaft support and the second shaft support, and the bottom door opening and closing mechanism is connected to the bottom door body of both bottom door structures.

[0014] Furthermore, the steps for connecting the hinge seats of the two bottom door structures to the crossbeam include:

[0015] Mark the installation areas for the hinge seats of the bottom door structure on the crossbeam;

[0016] Align the two hinge seats of the bottom door structure with the installation area, and place the two hinge seats of the bottom door structure in the installation area;

[0017] The hinge seats and crossbeams of the two bottom door structures are connected respectively.

[0018] Furthermore, the step of marking out the installation areas for the hinge seats of the two bottom door structures on the crossbeam includes:

[0019] Using the center line of the crossbeam as a reference, draw the first position line of the first side of the hinge seat corresponding to each bottom door structure and the second position line of the second side of the hinge seat.

[0020] Using the center line of the central beam as a reference, draw the third position line of the third side of the hinge seat corresponding to each bottom door structure and the fourth position line of the fourth side of the hinge seat.

[0021] The installation area is formed between the first position line, the second position line, the third position line, and the fourth position line.

[0022] Furthermore, the steps of connecting the hinge seats and crossbeams of the two bottom door structures respectively include:

[0023] The hinge seat and crossbeam are connected by welding.

[0024] Rotate the bottom door to test its rotation flexibility;

[0025] Measure the first gap L1 between the bottom door body and the funnel ridge of the vehicle body structure;

[0026] Measure the second gap L2 between the bottom door body and the first side beam of the vehicle body structure;

[0027] Measure the third gap L3 between the bottom door body and the second side beam of the vehicle body structure;

[0028] When the first gap L1 satisfies the first preset interval, the second gap L2 satisfies the second preset interval, and the third gap L3 satisfies the third preset interval, the connection between the hinge seat and the crossbeam is completed.

[0029] Furthermore, the steps of connecting the first axle support and the second axle support to the vehicle body structure respectively include:

[0030] Two process shaft positioning templates were obtained;

[0031] Place the two process shaft positioning templates at intervals on the support mounting surface of the crossbeam;

[0032] Place the process shaft on the two process shaft positioning templates;

[0033] Adjust the height of the first shaft support and the height of the second shaft support according to the distance between the process shaft and the support mounting surface of the crossbeam.

[0034] The first shaft support and the second shaft support are placed alternately on the crossbeam, and the process shaft is connected to both the first shaft support and the second shaft support.

[0035] Connect the first shaft support and the crossbeam, and connect the second shaft support and the crossbeam.

[0036] Furthermore, the steps of connecting the bottom door opening and closing mechanism to both the first and second shaft supports, and connecting the bottom door opening and closing mechanism to the bottom door bodies of both bottom door structures, include:

[0037] A drive shaft positioning template is obtained, and a positioning arc surface is provided on the drive shaft positioning template.

[0038] Connect the drive shaft positioning template to the connecting pin, and position the positioning arc surface at the end of the drive shaft positioning template away from the crossbeam.

[0039] Adjust the height of the bottom door opening and closing mechanism until the drive shaft of the bottom door opening and closing mechanism is in contact with the positioning arc surface;

[0040] The drive shaft and the first shaft support, as well as the drive shaft and the second shaft support, are respectively connected;

[0041] The first connecting column connects the first end of the first linkage structure of the bottom door opening and closing mechanism to the double lever of the bottom door opening and closing mechanism. The second connecting column connects the second end of the first linkage structure to one of the two bottom door hinges. The third connecting column connects the first end of the second linkage structure of the bottom door opening and closing mechanism to the double lever of the bottom door opening and closing mechanism. The fourth connecting column connects the second end of the second linkage structure to the other of the two bottom door hinges.

[0042] Furthermore, the steps of connecting the first end of the first linkage structure of the bottom door opening and closing mechanism to the double lever of the bottom door opening and closing mechanism using a first connecting column, connecting the second end of the first linkage structure to the bottom door hinge using a second connecting column, connecting the first end of the second linkage structure of the bottom door opening and closing mechanism to the double lever of the bottom door opening and closing mechanism using a third connecting column, and connecting the second end of the second linkage structure to the bottom door hinge using a fourth connecting column, and then connecting the bottom door opening and closing mechanism to both the first shaft support and the second shaft support, and connecting the bottom door opening and closing mechanism to the bottom door bodies of both bottom door structures, further include:

[0043] The fixed frame of the eccentricity measuring ruler is attached to both the first and second connecting columns, and the moving plate of the eccentricity measuring ruler is attached to the transmission shaft. The eccentricity E is measured. When the eccentricity E meets the fourth preset range, the adjustment of the length of the first connecting rod structure and the adjustment of the length of the second connecting rod structure are stopped. The moving plate is movably mounted on the fixed frame along the width direction of the fixed frame.

[0044] Furthermore, after the steps of fitting the fixing frame of the eccentricity measuring ruler to both the first and second connecting columns, and fitting the moving plate of the eccentricity measuring ruler to the transmission shaft, and measuring the eccentricity E, the steps of connecting the bottom door opening and closing mechanism to both the first and second shaft supports, and connecting the bottom door opening and closing mechanism to the bottom door bodies of both bottom door structures, also include:

[0045] Measure the second gap L2 between the bottom door body and the first side beam, and measure the third gap L3 between the bottom door body and the second side beam. When the second gap L2 meets the third preset interval and the third gap L3 meets the fourth preset interval, the connection between the bottom door opening and closing mechanism and the bottom door body of the two bottom door structures is completed.

[0046] Furthermore, prior to the step of connecting the drive shaft positioning template to the connecting pin, the method for manufacturing the hopper car includes:

[0047] Rotate the bottom door body so that it fits snugly against both the first and second side beams.

[0048] Further, adjusting the height of the bottom door opening and closing mechanism until the drive shaft of the bottom door opening and closing mechanism is in contact with the positioning arc surface includes the following steps:

[0049] Place the bottom door opening and closing mechanism on the lifting device, and adjust the position of the bottom door opening and closing mechanism so that the double lever is aligned with the bottom door hinge;

[0050] The lifting device is used to raise the bottom door opening and closing mechanism until the drive shaft is in contact with the positioning arc surface.

[0051] By applying the technical solution of this invention, a bottom door assembly and an opening / closing mechanism are obtained during the process of obtaining the vehicle body structure. After obtaining the two bottom door structures of the bottom door assembly, the bottom door body and bottom door hinge of each bottom door structure are connected respectively. After obtaining the first axle support and the second axle support, the first axle support and the second axle support are connected to the vehicle body structure respectively, which can improve the installation accuracy of the first axle support and the second axle support. The bottom door hinge and the hinge seat are connected by connecting pins, and then the hinge seat is connected to the crossbeam. Then, the bottom door opening / closing mechanism is connected to the first axle support, and the bottom door opening / closing mechanism is connected to the second axle support, and the bottom door opening / closing mechanism is connected to both bottom door bodies. That is, by obtaining the bottom door assembly and the bottom door opening / closing mechanism during the process of obtaining the vehicle body structure, and assembling the bottom door body and the bottom door hinge of the bottom door structure, compared with the prior art of sequentially installing each part of the bottom door structure and each part of the bottom door opening / closing mechanism to the vehicle body structure during the manufacturing of the vehicle body structure, the assembly time of the funnel car can be reduced. Therefore, the technical solution of this application effectively solves the problem of low manufacturing efficiency of hopper cars in related technologies. Attached Figure Description

[0052] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0053] Figure 1 A schematic flowchart of an embodiment of a method for manufacturing a funnel cart according to the present invention is shown;

[0054] Figure 2 It shows Figure 1 Step S70 of the manufacturing method of the funnel car: A schematic diagram of the process of connecting the hinge seats of the two bottom door structures to the crossbeam;

[0055] Figure 3 It shows Figure 2 Step S71 of the manufacturing method of the funnel car: A flowchart illustrating the process of marking the installation area of ​​the hinge seats of the two bottom door structures on the crossbeam.

[0056] Figure 4 It shows Figure 1 A schematic diagram of step S50 of the manufacturing method of the funnel car: connecting the first axle support and the second axle support to the car body structure respectively.

[0057] Figure 5 It shows Figure 1 A schematic diagram of a partial structure of a funnel car manufactured using the method described above.

[0058] Figure 6 It shows Figure 5 A front view schematic diagram of the funnel cart;

[0059] Figure 7 It shows Figure 6 A partial structural diagram of point A of the funnel cart;

[0060] Figure 8 It shows Figure 5 A front view schematic diagram of the crossbeam of the funnel cart;

[0061] Figure 9 It shows Figure 5 A front view schematic diagram of the bottom door of the funnel cart;

[0062] Figure 10 It shows Figure 1 A schematic diagram of the eccentricity measuring ruler in the manufacturing method of the funnel car;

[0063] Figure 11 It shows Figure 10 A schematic diagram of the partial structure at point B of the eccentricity measuring ruler;

[0064] Figure 12 It shows Figure 1 A three-dimensional structural diagram of the assembly tooling for the bottom door opening and closing structure of the manufacturing method of the funnel car;

[0065] Figure 13 It shows Figure 10 A front view schematic diagram of the assembly tooling;

[0066] Figure 14 It shows Figure 10 A side view of the assembly tooling;

[0067] Figure 15 It shows Figure 5 A front view diagram of the bottom door body, first side beam, and second side beam of the funnel car when they are connected.

[0068] The above figures include the following reference numerals:

[0069] 10. Body structure; 11. Center beam; 12. Crossbeam; 121. Support mounting surface; 13. First side beam; 131. Side beam plate; 14. Second side beam; 15. Funnel ridge; 16. Side funnel plate; 20. Bottom door assembly; 21. Bottom door structure; 211. Bottom door body; 212. Bottom door hinge; 213. Hinge seat; 30. Bottom door opening and closing mechanism; 31. Drive shaft; 32. First linkage structure; 33. Double lever; 34. Second linkage structure; 35. Door opening arm; 36. Door closing arm; 40. First shaft support; 50. Second shaft support; 60. Connecting pin; 70. Process shaft positioning template; 80. Process shaft; 90. Transmission shaft positioning template; 91. Positioning arc surface; 100. First connecting column; 110. Second connecting column; 120. Third connecting column; 130. Fourth connecting column; 140. Eccentricity measuring ruler; 141. Fixed frame; 142. Moving plate. Detailed Implementation

[0070] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0071] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0072] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0073] like Figure 1 and Figure 5 As shown, the manufacturing method of the funnel car in this embodiment includes:

[0074] Step S10: Obtain the middle beam 11, the cross beam 12, the first side beam 13 and the second side beam 14 respectively, and assemble the middle beam 11, the cross beam 12, the first side beam 13 and the second side beam 14 to obtain the vehicle body structure 10;

[0075] Step S20: In the process of obtaining the vehicle body structure 10, the bottom door assembly 20 is obtained. The bottom door assembly 20 includes two bottom door structures 21. Each bottom door structure 21 includes a bottom door body 211, a bottom door hinge 212, and a hinge seat 213. The bottom door body 211 and bottom door hinge 212 of the two bottom door structures 21 are assembled respectively.

[0076] Step S30: During the process of obtaining the vehicle body structure 10, the bottom door opening and closing mechanism 30 is obtained;

[0077] Step S40: Obtain the first shaft support 40 and the second shaft support 50 respectively;

[0078] Step S50: Connect the first axle support 40 and the second axle support 50 to the vehicle body structure 10 respectively;

[0079] Step S60: Connect the bottom door hinges 212 and hinge seats 213 of the two bottom door structures 21 using connecting pins 60;

[0080] Step S70: Connect the hinge seats 213 of the two bottom door structures 21 to the crossbeam 12;

[0081] Step S80: Connect the bottom door opening and closing mechanism 30 to both the first shaft support 40 and the second shaft support 50, and connect the bottom door opening and closing mechanism 30 to both the bottom door body 211 of the two bottom door structures 21.

[0082] Applying the technical solution of this embodiment, the bottom door assembly 20 and the opening and closing mechanism are obtained during the process of obtaining the vehicle body structure 10. After obtaining the two bottom door structures 21 of the bottom door assembly 20, the bottom door body 211 and the bottom door hinge 212 of each bottom door structure 21 are connected respectively. After obtaining the first axle support 40 and the second axle support 50, the first axle support 40 and the second axle support 50 are connected to the vehicle body structure 10 respectively, which can improve the installation accuracy of the first axle support 40 and the second axle support 50. The bottom door hinge 212 and the hinge seat 213 are connected by the connecting pin 60, and then the hinge seat 213 is connected to the crossbeam 12. Then, the bottom door opening and closing mechanism 30 is connected to the first axle support 40 and the second axle support 50, and the bottom door opening and closing mechanism 30 is connected to both bottom door bodies 211. That is, by obtaining the bottom door assembly 20 and the bottom door opening and closing mechanism 30 during the process of obtaining the vehicle body structure 10, and assembling the bottom door body 211 and the bottom door hinge 212 of the bottom door structure 21, compared with the prior art where each part of the bottom door structure 21 and each part of the bottom door opening and closing mechanism 30 are sequentially installed onto the vehicle body structure 10 during manufacturing, the assembly time of the funnel car can be reduced. Therefore, the technical solution of this embodiment effectively solves the problem of low manufacturing efficiency of funnel cars in related technologies.

[0083] When assembling the central beam 11, crossbeam 12, first side beam 13, and second side beam 14, the crossbeam 12 is installed with the lower plane of the central beam 11 as a reference. The height difference between the lowest point of the lower edge of the crossbeam 12 and the lower plane of the central beam 11 is controlled, and the horizontal difference of the lower edge of the crossbeam 12 is controlled not to exceed a first preset horizontal difference range. The first preset horizontal difference range is greater than or equal to 0 mm and less than or equal to 1.5 mm, and can be 0.5 mm, 0.8 mm, 1 mm, 1.2 mm, 1.3 mm, or 1.5 mm. In this embodiment, the first preset horizontal difference range is greater than or equal to 0 mm and less than or equal to 1 mm.

[0084] Since the crossbeam 12 serves as the foundation for the installation of the bottom door and its opening / closing mechanism 30, and the relative position between the bottom door and its opening / closing mechanism 30 and the crossbeam 12 remains unchanged after installation, the final heights of the drive shaft 31, the contact rollers of the opening arm 35, and the contact rollers of the closing arm 36 vary with the position of the crossbeam 12 relative to the center beam 11. Therefore, after vehicle manufacturing, the height of the crossbeam 12 relative to the track surface and its parallelism relative to the horizontal plane are direct factors determining whether the height of the drive shaft 31, the height of the contact rollers of the opening arm 35 from the track surface, and the height of the contact rollers of the closing arm 36 from the track surface meet the relevant requirements. Furthermore, the assembly quality of the crossbeam 12 is related to the selection of the positioning reference for the crossbeam 12 during the manufacturing of the vehicle body structure 10 and the upward deflection value of the center beam 11. Therefore, during vehicle manufacturing, it is necessary to determine the upward deflection value of the center beam 11 and reasonably determine the positioning reference for the crossbeam 12.

[0085] During the manufacturing of the central beam 11, it is necessary to control the upper deflection value of the central beam 11. Assembly fixtures and welding devices are used to control the deformation of the central beam 11, ensuring that the upper deflection value of the central beam 11 is within a first preset deflection value range. The first preset deflection value range is greater than or equal to 0 and less than or equal to 3mm.

[0086] It should be noted that the upper deflection value of the middle beam 11 refers to the distance between the highest point and the lowest point of the middle beam 11.

[0087] When assembling the center beam 11, cross beam 12, first side beam 13, and second side beam 14, the positioning references for the center beam 11 and cross beam 12 are unified. The center beam 11 uses the upper center plate surface as its positioning reference in the vertical direction, and clamping devices on the tooling near the upper center plate and at the center of the center beam 11 are used to control the deflection value of the center beam 11 within a second preset deflection value range. The cross beam 12 uses the upper center plate surface as its positioning reference in the height direction, and is positioned and assembled using the support mounting surface 121 on the cross beam 12, ensuring that the height difference of the cross beam 12 relative to the upper center plate surface meets a preset height difference range and that the horizontal difference in the overall length direction of the cross beam 12 meets a second preset horizontal difference range.

[0088] The second preset deflection value range is 2±1mm. The preset height difference range is greater than or equal to 0 and less than or equal to 2mm. The preset horizontal difference range is greater than or equal to 0 and less than or equal to 2mm.

[0089] By adjusting the assembly of the bottom door structure 21 to be completed during the vehicle body manufacturing process, the problem of excessively long process cycle caused by assembling the bottom door structure 21 and the bottom door opening and closing mechanism 30 in the same process can be solved, and the welding quality of the bottom door hinge 212 seat can also be improved.

[0090] Each bottom door structure 21 includes two hinge seats 213, which are spaced apart along the length of the crossbeam 12.

[0091] Both the bottom door assembly 20 and the bottom door opening and closing mechanism 30 include multiple components. Multiple bottom door assemblies 20 are arranged at intervals along the length direction of the middle beam, and the bottom door assembly 20 and the bottom door opening and closing mechanism 30 are arranged in a one-to-one correspondence.

[0092] It should be noted that the order of steps S20, S30 and S40 can be reversed.

[0093] Step S10: The steps of obtaining the middle beam 11, cross beam 12, first side beam 13, and second side beam 14 respectively, and assembling the middle beam 11, cross beam 12, first side beam 13, and second side beam 14 to obtain the vehicle body structure 10 further include:

[0094] Step S11: Obtain the funnel ridge 15, and assemble the funnel ridge with the central beam 11, the funnel ridge with the first side beam 13, and the funnel ridge with the second side beam 14.

[0095] With the above setup, the funnel ridge 15 can be obtained, and the funnel ridge is assembled with the middle beam 11, the funnel ridge with the first side beam 13, and the funnel ridge with the second side beam 14 respectively to obtain the vehicle body structure 10.

[0096] like Figure 2 As shown, in this embodiment, step S70: connecting the hinge seats 213 of the two bottom door structures 21 to the crossbeam 12 includes:

[0097] Step S71: Mark the installation areas for the hinge seats 213 of the two bottom door structures 21 on the crossbeam 12;

[0098] Step S72: Align the hinge seats 213 of the two bottom door structures 21 with the installation area, and place the hinge seats 213 of the two bottom door structures 21 in the installation area;

[0099] Step S73: Connect the hinge seats 213 and the crossbeams 12 of the two bottom door structures 21 respectively.

[0100] With the above settings, the installation area of ​​the hinge holder 213 can be obtained, and the hinge holder 213 can be placed in the installation area to facilitate the connection between the hinge holder 213 and the crossbeam 12.

[0101] like Figure 3 As shown, in this embodiment, step S71: marking the mounting areas of the hinge seats 213 of the two bottom door structures 21 on the crossbeam 12 includes:

[0102] Step S711: Using the center line of the crossbeam 12 as a reference, draw the first position line of the first side of the hinge seat 213 corresponding to each bottom door structure 21 and the second position line of the second side of the hinge seat 213.

[0103] Step S712: Using the center line of the middle beam 11 as a reference, draw the third position line of the third side of the hinge seat 213 corresponding to each bottom door structure 21 and the fourth position line of the fourth side of the hinge seat 213.

[0104] Step S713: An installation area is formed between the first position line, the second position line, the third position line, and the fourth position line.

[0105] The above settings allow for the marking of the installation area, facilitating the installation of the hinge bracket 213 onto the crossbeam 12.

[0106] It should be noted that the first and second sides of the folding base 213 are arranged opposite to each other, and the third and fourth sides of the folding base 213 are arranged opposite to each other. The third side is connected between the first and second sides, and the fourth side is connected between the first and second sides.

[0107] It should be noted that when drawing the first position line, the second position line, the third position line, and the fourth position line, the folding seat 213 can be used as a positioning template, or the first position line, the second position line, the third position line, and the fourth position line can be drawn according to the distance between the center line of the crossbeam 12 and the center line of the middle beam 11 and the folding seat 213.

[0108] When using the positioning template of the hinge holder 213, connect the positioning template of the hinge holder 213 to both connecting pins 60, and align the positioning template of the hinge holder 213 with the center line of the crossbeam 12 and the center line of the middle beam 11. Then, use the lifting vehicle to drive the bottom door structure 21 to rise, so that the positioning template of the hinge holder 213 fits with the crossbeam 12, and draw the first position line, the second position line, the third position line and the fourth position line.

[0109] The positioning template of the hinge seat 213 and the two connecting pins 60 ensure that the spacing between the two bottom door hinge seats 212 meets the relevant requirements.

[0110] like Figure 6, Figure 7 as well as Figure 15 As shown, in this embodiment, step S73: connecting the hinge seats 213 and the crossbeam 12 of the two bottom door structures 21 respectively includes:

[0111] Step S731: Connect the hinge seat 213 and the crossbeam 12 by welding.

[0112] Step S732: Rotate the bottom door body 211 to test the rotation flexibility of the bottom door body 211;

[0113] Step S733: Measure the first gap L1 between the bottom door body 211 and the funnel ridge 15 of the vehicle body structure 10;

[0114] Step S734: Measure the second gap L2 between the bottom door body 211 and the first side beam 13 of the vehicle body structure 10;

[0115] Step S735: Measure the third gap L3 between the bottom door body 211 and the second side beam 14 of the vehicle body structure 10;

[0116] Step S736: When the first gap L1 satisfies the first preset interval, the second gap L2 satisfies the second preset interval, and the third gap L3 satisfies the third preset interval, the connection between the hinge seat 213 and the crossbeam 12 is completed.

[0117] The above setup connects the hinge seat 213 and the crossbeam 12. A rotational flexibility test of the bottom door body 211 is performed to determine if the bottom door rotates smoothly, thus facilitating adjustments to the bottom door based on its smoothness. Measuring the first gap L1, the second gap L2, and the third gap L3 helps determine if the installation position of the bottom door body 211 is accurate. Based on these gaps, the position of the bottom door body 211 can be adjusted or modified to ensure that the first gap L1 meets the first preset range, the second gap L2 meets the second preset range, and the third gap L3 meets the second preset range.

[0118] It should be noted that when testing the rotation flexibility of the bottom door 211, if there is an abnormal noise when the bottom door 211 rotates, or if the pushing force required to push the bottom door 211 increases when it rotates to a certain position, then the bottom door 211 is judged to be not rotating flexibly and needs to be adjusted.

[0119] The first side beam 13 and the second side beam 14 have the same structure. The first side beam 13 includes a side beam plate 131 and a side funnel plate 16 connected to the side beam plate 131. The side beam plate 131 is disposed above the side funnel plate 16.

[0120] The second gap L2 between the bottom door body 211 and the first side beam 13 of the vehicle body structure 10 is measured, which means measuring the gap between the bottom door body 211 and the side funnel plate 16 of the vehicle body structure 10.

[0121] like Figure 4 and Figure 8 As shown, in this embodiment, step S50: connecting the first axle support 40 and the second axle support 50 to the vehicle body structure 10 respectively includes:

[0122] Step S51: Obtain two process shaft positioning templates 70;

[0123] Step S52: Place the two process shaft positioning templates 70 at intervals on the support mounting surface 121 of the crossbeam 12;

[0124] Step S53: Place the process shaft 80 on the two process shaft positioning templates 70;

[0125] Step S54: Adjust the height of the first shaft support 40 and the height of the second shaft support 50 according to the distance between the process shaft 80 and the support mounting surface 121 of the crossbeam 12.

[0126] Step S55: Place the first shaft support 40 and the second shaft support 50 on the crossbeam 12 at intervals, and connect the process shaft 80 to both the first shaft support 40 and the second shaft support 50.

[0127] Step S56: Connect the first shaft support 40 and the crossbeam 12, and connect the second shaft support 50 and the crossbeam 12.

[0128] With the above settings, by using two process shaft positioning templates 70 to cooperate with the support mounting surface 121 of the crossbeam 12, the position of the process shaft 80 can be determined. Then, based on the position of the process shaft 80, the height of the first shaft support 40 and the height of the second shaft support 50 can be determined. Then, the height of the first shaft support 40 and the height of the second shaft support 50 can be adjusted. Finally, the first shaft support 40 and the second shaft support 50 are installed onto the crossbeam 12.

[0129] When the first shaft support 40 and the second shaft support 50 are welded to the crossbeam 12, the middle beam 11, the crossbeam 12, the first side beam 13 and the second side beam 14 are rotated 180°. Taking the support mounting surface 121 on the crossbeam 12 as a reference, the first shaft support 40 and the second shaft support 50 are assembled synchronously using the process shaft 80 and the process shaft positioning template 70 to ensure the height of the first shaft support 40 and the second shaft support 50 relative to the crossbeam 12, thereby controlling the height and tilt of the subsequent transmission shaft 31 after assembly.

[0130] When the vehicle body structure 10 is welded, the middle beam 11, the cross beam 12, the first side beam 13 and the second side beam 14 are placed on the support base. The middle beam 11 is fixed by a locking device to further control the deflection of the middle beam 11 to 2±1mm. The cross beam 12 is fixed by a support device on both sides to ensure that the horizontal difference in the length direction of the cross beam 12 is not greater than 3mm. Then the end walls and side walls are assembled.

[0131] The third preset deflection value range is 2±1mm. The third preset horizontal difference range is greater than or equal to 0 and less than or equal to 3mm.

[0132] It should be noted that the axis of the process shaft is parallel to the center line of the crossbeam.

[0133] When the two process shaft positioning templates 70 are placed at intervals on the support mounting surface 121 of the crossbeam 12, the two process shaft positioning templates 70 extend along the direction of the center line of the crossbeam.

[0134] Adjusting the height of the first shaft support 40 and the second shaft support 50 according to the distance between the process shaft 80 and the support mounting surface 121 of the crossbeam 12 means that, according to the distance between the process shaft 80 and the crossbeam, the outer surfaces of the first shaft support 40 and the second shaft support 50 are trimmed so that the first shaft support 40 and the second shaft support 50 are placed alternately on the crossbeam 12, and after the process shaft 80 is connected to the first shaft support 40 and the second shaft support 50, the distance between the process shaft 80 and the crossbeam 12 remains unchanged.

[0135] like Figure 9 As shown, in this embodiment, step S80: connecting the bottom door opening and closing mechanism 30 to both the first shaft support 40 and the second shaft support 50, and connecting the bottom door opening and closing mechanism 30 to both bottom door bodies 211 of the two bottom door structures 21, includes:

[0136] Step S81: Obtain the drive shaft positioning template 90, on which a positioning arc surface 91 is provided;

[0137] Step S83: Connect the drive shaft positioning template 90 to the connecting pin 60, and position the positioning arc surface 91 at the end of the drive shaft positioning template 90 away from the crossbeam 12;

[0138] Step S84: Adjust the height of the bottom door opening and closing mechanism 30 until the drive shaft 31 of the bottom door opening and closing mechanism 30 is in contact with the positioning arc surface 91;

[0139] Step S85: Connect the drive shaft 31 and the first shaft support 40, as well as the drive shaft 31 and the second shaft support 50 respectively;

[0140] Step S86: Use the first connecting post 100 to connect the first end of the first link structure 32 of the bottom door opening and closing mechanism 30 to the double lever 33 of the bottom door opening and closing mechanism 30; use the second connecting post 110 to connect the second end of the first link structure 32 to one of the two bottom door hinges 212; use the third connecting post 120 to connect the first end of the second link structure 34 of the bottom door opening and closing mechanism 30 to the double lever 33 of the bottom door opening and closing mechanism 30; and use the fourth connecting post 130 to connect the second end of the second link structure 34 to the other bottom door hinge 212.

[0141] With the above setup, the position of the drive shaft 31 can be determined using the drive shaft positioning template 90, allowing the drive shaft 31 to be installed onto the first shaft support 40 and the second shaft support 50. After the drive shaft 31 is installed, the first connecting rod structure 32 connects the double lever 33 to one of the two bottom door hinges 212, and the second connecting rod structure 34 connects the double lever 33 to the other bottom door hinge 212.

[0142] The drive shaft 31 is connected to the first shaft support 40 and the second shaft support 50 by bolts.

[0143] It should be noted that the drive shaft positioning template is T-shaped.

[0144] Each bottom door opening and closing mechanism 30 includes two double levers 33, which are spaced apart in the axial direction of the drive shaft 31.

[0145] like Figure 10 and Figure 11 As shown, in this embodiment, after step S86: connecting the first end of the first link structure 32 of the bottom door opening and closing mechanism 30 to the double lever 33 of the bottom door opening and closing mechanism 30 using the first connecting column 100, connecting the second end of the first link structure 32 to the bottom door hinge 212 using the second connecting column 110, connecting the first end of the second link structure 34 of the bottom door opening and closing mechanism 30 to the double lever 33 of the bottom door opening and closing mechanism 30 using the third connecting column 120, and connecting the second end of the second link structure 34 to the bottom door hinge 212 using the fourth connecting column 130, step S80: connecting the bottom door opening and closing mechanism 30 to both the first shaft support 40 and the second shaft support 50, and connecting the bottom door opening and closing mechanism 30 to both bottom door bodies 211 of the two bottom door structures 21, the step further includes:

[0146] Step S87: Fit the fixed frame 141 of the eccentricity measuring ruler 140 with both the first connecting column 100 and the second connecting column 110, and fit the moving plate 142 of the eccentricity measuring ruler 140 with the transmission shaft 31. Measure the eccentricity E. When the eccentricity E meets the fourth preset range, stop adjusting the length of the first connecting rod structure 32 and the length of the second connecting rod structure 34. The moving plate 142 is movably mounted on the fixed frame 141 along the width direction of the fixed frame 141.

[0147] With the above settings, the eccentricity E can be measured using the eccentricity measuring ruler 140. Then, the length of the first link structure 32 and the length of the second link structure 34 can be adjusted according to the eccentricity E until the eccentricity E meets the fourth preset range.

[0148] Eccentricity E refers to the minimum distance in the width direction of the fixed frame 141 between the line connecting the axis of the first connecting column 100 and the axis of the second connecting column 110 and the axis of the transmission shaft 31.

[0149] When measuring the eccentricity, the moving plate 142 is in contact with the drive shaft 31. At this time, the moving plate 142 extends a distance F relative to the surface of the fixed frame 141. The distance F is the eccentricity E.

[0150] It should be noted that the bottom door opening and closing mechanism 30 also includes an opening arm 35 and a closing arm 36, which are respectively located at both ends of the transmission shaft 31.

[0151] like Figures 12 to 14 As shown, the drive shaft 31 is machined on a lathe, and the coaxiality of the drive shaft 31 is controlled to meet the preset coaxiality range. The rivet holes connecting the door opening arm 35 and the drive shaft 31, as well as the rivet holes connecting the door closing arm 36 and the drive shaft 31, are machined on a CNC milling machine to ensure that the angle between the axis of the rivet hole connecting the door opening arm 35 and the drive shaft 31 and the vertical direction, respectively, is within the specified range.

[0152] The coaxiality preset range is ≤0.8mm.

[0153] During the assembly of the bottom door opening and closing mechanism 30, the spatial positions of the components of the drive shaft 31 are simulated when the bottom door is closed. The spatial angular dimensions of the bottom door opening and closing mechanism 30 are converted into horizontal and vertical coordinate dimensions relative to the axis of the drive shaft 31. The bottom door opening and closing mechanism 30 is assembled using a pin-hole positioning method with assembly tooling. The drive shaft 31 is positioned at its connection with the first shaft support 40 and the second shaft support 50. The double lever 33, the opening arm 35, and the closing arm 36 are all positioned by holes. The coaxiality of the holes on the same side of the double lever 33 and the relative positional accuracy of the holes of the double lever 33 with the contact roller support holes on the opening arm 35 and the closing arm 36 are controlled. After positioning, rivets are installed, riveted, and related welds are welded.

[0154] It should be noted that the assembly fixture includes a substrate, a first support, a second support, a third support, a fourth support, a fifth support, and a sixth support. The first support, second support, third support, fourth support, fifth support, and sixth support are sequentially and alternately arranged on the substrate. The direction of the first support to the sixth support is parallel to the axial direction of the drive shaft.

[0155] The first bracket supports the door opening arm 35. The second and fifth brackets support the drive shaft 31. The third bracket supports one of the two double levers, and the fourth bracket supports the other double lever. The sixth bracket supports the door closing arm 36.

[0156] The door opening arm 35 is connected to the first bracket via a first locating pin. A double lever 33, connected to the third bracket, is connected to the third bracket via a second and a third locating pin. A double lever 33, connected to the fourth bracket, is connected to the fourth bracket via a fourth and a fifth locating pin. The door closing arm 36 is connected to the sixth bracket via a sixth locating pin.

[0157] By using assembly fixtures, the assembly of the opening arm 35 and closing arm 36 of the bottom door opening and closing mechanism 30 is made more precise. This allows for more accurate control of the opening and closing of the bottom door through the opening and closing arms.

[0158] In this embodiment, after step S87: attaching the fixing frame 141 of the eccentricity measuring ruler 140 to both the first connecting column 100 and the second connecting column 110, and attaching the moving plate 142 of the eccentricity measuring ruler 140 to the transmission shaft 31 and measuring the eccentricity E, step S80: connecting the bottom door opening and closing mechanism 30 to both the first shaft support 40 and the second shaft support 50, and connecting the bottom door opening and closing mechanism 30 to the bottom door body 211 of both bottom door structures 21, further includes:

[0159] Step S88: Measure the second gap L2 between the bottom door body 211 and the first side beam 13, and measure the third gap L3 between the bottom door body 211 and the second side beam 14. When the second gap L2 meets the third preset interval and the third gap L3 meets the fourth preset interval, the connection between the bottom door opening and closing mechanism 30 and the bottom door body 211 of the two bottom door structures 21 is completed.

[0160] With the above settings, the second gap L2 and the third gap L3 are measured, which makes it easy to adjust the door or its position based on the second gap L2 and the third gap L3.

[0161] After measuring the second gap L2 and the third gap L3, measure the height of the contact roller of the door opening arm 35 and the contact roller of the door closing arm 36.

[0162] With the bottom door structure 21 closed, the eccentricity E and the gap between the bottom door body 211 and the funnel ridge 15 can be adjusted by rotating the transmission shaft 31 and adjusting the lengths of the first connecting rod structure 32 and the second connecting rod structure 34.

[0163] The distance by which the end of the movable plate 142 that contacts the drive shaft 31 extends beyond the fixed frame 141 is the eccentricity E. Using an eccentricity measuring ruler 140, the measurement is efficient and the reading is convenient. After the eccentricity E meets the fourth preset range, a feeler gauge is used to check the gaps between the bottom door body 211 and the funnel spine 15, the first side beam 13, and the second side beam 14.

[0164] Multiple opening and closing tests were performed on the bottom door body 211 to check for changes in dimensions such as eccentricity E, second gap L2, and third gap L3. If changes were found, they could be adjusted by adjusting the first connecting rod structure 32 and the second connecting rod structure 34. Finally, the adjusting nuts of the first connecting rod structure 32 and the second connecting rod structure 34 were tightened and locked.

[0165] In this embodiment, before step S83: connecting the drive shaft positioning template 90 to the connecting pin 60, step S80: connecting the bottom door opening and closing mechanism 30 to both the first shaft support 40 and the second shaft support 50, and connecting the bottom door opening and closing mechanism 30 to both bottom door bodies 211 of the two bottom door structures 21, further includes:

[0166] Step S82: Connect the bottom door opening and closing mechanism 30 to both the first shaft support 40 and the second shaft support 50, and connect the bottom door opening and closing mechanism 30 to both the bottom door body 211 of the two bottom door structures 21. Rotate the bottom door body 211 so that the bottom door body 211 fits against both the first side beam 13 and the second side beam 14.

[0167] The above-mentioned arrangement increases the space between the two bottom door bodies 211, making it easier to install the bottom door opening and closing mechanism 30.

[0168] In this embodiment, step S84: adjusting the height of the bottom door opening and closing mechanism 30 until the drive shaft 31 of the bottom door opening and closing mechanism 30 is in contact with the positioning arc surface 91 includes:

[0169] Step S841: Place the bottom door opening and closing mechanism 30 on the lifting device and adjust the position of the bottom door opening and closing mechanism 30 so that the double lever 33 is aligned with the bottom door hinge 212;

[0170] Step S842: Use the lifting device to drive the bottom door opening and closing mechanism 30 to rise until the drive shaft 31 is in contact with the positioning arc surface 91.

[0171] With the above setup, the drive shaft 31 and the double lever 33 can be installed onto the first shaft support 40 and the second shaft support 50.

[0172] Using the manufacturing method of the funnel car in this embodiment can reduce the probability that the eccentricity E and the height of the contact rollers will not meet the requirements after the bottom door opening and closing mechanism 30 is assembled, thereby improving the assembly quality pass rate. It simplifies the manufacturing process of the bottom door opening and closing mechanism 30, reduces the number of operators, improves assembly efficiency, shortens the production cycle of the funnel car, and increases production capacity.

[0173] The manufacturing method of the funnel car in this embodiment divides the manufacturing modules according to the assembly sequence of the parts and the manufacturing precision requirements, optimizes the process flow, determines the assembly benchmark, formulates process measures, and selects testing methods, thereby realizing the rapid installation and debugging of the bottom door opening and closing mechanism 30 and ensuring the relevant dimensional requirements.

[0174] In the description of this invention, it should be understood that "a plurality of" means two or more. Directional terms such as "front, back, up, down, left, right," "horizontal, vertical, perpendicular, horizontal," and "top, bottom" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing the invention and simplifying the description. Unless otherwise stated, these directional terms 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 limiting the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the outline of each component itself.

[0175] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0176] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0177] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for manufacturing a hopper cart, characterized in that, include: The middle beam (11), the cross beam (12), the first side beam (13) and the second side beam (14) are obtained respectively, and the middle beam (11), the cross beam (12), the first side beam (13) and the second side beam (14) are assembled to obtain the vehicle body structure (10). In the process of obtaining the vehicle body structure (10), a bottom door assembly (20) is obtained. The bottom door assembly (20) includes two bottom door structures (21). Each bottom door structure (21) includes a bottom door body (211), a bottom door hinge (212), and a hinge seat (213). The bottom door body (211) and the bottom door hinge (212) of the two bottom door structures (21) are assembled respectively. In the process of obtaining the vehicle body structure (10), the bottom door opening and closing mechanism (30) is obtained. The first shaft support (40) and the second shaft support (50) are obtained respectively. The first axle support (40) and the second axle support (50) are respectively connected to the vehicle body structure (10); The bottom door hinges (212) of the two bottom door structures (21) are connected to the hinge base (213) by a connecting pin (60); Connect the hinge seats (213) of the two bottom door structures (21) to the crossbeam (12); The bottom door opening and closing mechanism (30) is connected to both the first shaft support (40) and the second shaft support (50), and the bottom door opening and closing mechanism (30) is connected to both the bottom door body (211) of the two bottom door structures (21); The step of connecting the hinge seats (213) of the two bottom door structures (21) to the crossbeam (12) includes: The mounting areas of the hinge seats (213) of the two bottom door structures (21) are marked on the crossbeam (12); Align the hinge seats (213) of the two bottom door structures (21) with the mounting area, and place the hinge seats (213) of the two bottom door structures (21) in the mounting area; The hinge seat (213) and the crossbeam (12) are respectively connected to the two bottom door structures (21); The step of marking the mounting areas of the hinge seats (213) of the two bottom door structures (21) on the crossbeam (12) includes: Using the center line of the crossbeam (12) as a reference, draw the first position line of the first side of the hinge seat (213) corresponding to each bottom door structure (21) and the second position line of the second side of the hinge seat (213); Using the center line of the middle beam (11) as a reference, draw the third position line of the third side of the hinge seat (213) corresponding to each bottom door structure (21) and the fourth position line of the fourth side of the hinge seat (213). The mounting area is formed between the first position line, the second position line, the third position line, and the fourth position line; The steps of connecting the hinge seat (213) and the crossbeam (12) of the two bottom door structures (21) respectively include: The hinge seat (213) and the crossbeam (12) are connected by welding. Rotate the bottom door body (211) to test the rotation flexibility of the bottom door body (211); Measure the first gap L1 between the bottom door body (211) and the funnel ridge (15) of the vehicle body structure (10); Measure the second gap L2 between the bottom door body (211) and the first side beam (13) of the vehicle body structure (10); Measure the third gap L3 between the bottom door body (211) and the second side beam (14) of the vehicle body structure (10); When the first gap L1 satisfies the first preset interval, the second gap L2 satisfies the second preset interval, and the third gap L3 satisfies the third preset interval, the connection between the hinge seat (213) and the crossbeam (12) is completed.

2. The method for manufacturing the funnel car according to claim 1, characterized in that, The step of connecting the first axle support (40) and the second axle support (50) to the vehicle body structure (10) respectively includes: Two process shaft positioning templates (70) were obtained. Two process shaft positioning templates (70) are placed at intervals on the support mounting surface (121) of the crossbeam (12); Place the process shaft (80) on the two process shaft positioning templates (70); Adjust the height of the first shaft support (40) and the height of the second shaft support (50) according to the distance between the process shaft (80) and the support mounting surface (121) of the crossbeam (12); The first shaft support (40) and the second shaft support (50) are placed at intervals on the crossbeam (12), and the process shaft (80) is connected to both the first shaft support (40) and the second shaft support (50); Connect the first shaft support (40) and the crossbeam (12), and connect the second shaft support (50) and the crossbeam (12).

3. The method for manufacturing the funnel car according to claim 1, characterized in that, The steps of connecting the bottom door opening and closing mechanism (30) to both the first shaft support (40) and the second shaft support (50), and connecting the bottom door opening and closing mechanism (30) to the bottom door body (211) of both bottom door structures (21) include: A drive shaft positioning template (90) is obtained, and a positioning arc surface (91) is provided on the drive shaft positioning template (90). Connect the drive shaft positioning template (90) to the connecting pin (60) and position the positioning arc surface (91) at the end of the drive shaft positioning template (90) away from the crossbeam (12); Adjust the height of the bottom door opening and closing mechanism (30) until the drive shaft (31) of the bottom door opening and closing mechanism (30) is in contact with the positioning arc surface (91); The drive shaft (31) and the first shaft support (40) are connected respectively, as are the drive shaft (31) and the second shaft support (50). The first end of the first link structure (32) of the bottom door opening and closing mechanism (30) is connected to the double lever (33) of the bottom door opening and closing mechanism (30) using a first connecting post (100), the second end of the first link structure (32) is connected to one of the two bottom door hinges (212) using a second connecting post (110), the first end of the second link structure (34) of the bottom door opening and closing mechanism (30) is connected to the double lever (33) of the bottom door opening and closing mechanism (30) using a third connecting post (120), and the second end of the second link structure (34) is connected to the other of the two bottom door hinges (212) using a fourth connecting post (130).

4. The method for manufacturing the funnel car according to claim 3, characterized in that, After connecting the first end of the first link structure (32) of the bottom door opening and closing mechanism (30) to the double lever (33) of the bottom door opening and closing mechanism (30) using the first connecting column (100), connecting the second end of the first link structure (32) to the bottom door hinge (212) using the second connecting column (110), connecting the first end of the second link structure (34) of the bottom door opening and closing mechanism (30) to the double lever (33) of the bottom door opening and closing mechanism (30) using the third connecting column (120), and connecting the second end of the second link structure (34) to the bottom door hinge (212) using the fourth connecting column (130), the step of connecting the bottom door opening and closing mechanism (30) to both the first shaft support (40) and the second shaft support (50), and connecting the bottom door opening and closing mechanism (30) to the bottom door body (211) of both bottom door structures (21) further includes: The fixing frame (141) of the eccentricity measuring ruler (140) is attached to both the first connecting column (100) and the second connecting column (110), and the moving plate (142) of the eccentricity measuring ruler (140) is attached to the transmission shaft (31) to measure the eccentricity E. When the eccentricity E meets the fourth preset range, the length of the first connecting rod structure (32) and the length of the second connecting rod structure (34) are stopped from being adjusted. The moving plate (142) is movably mounted on the fixing frame (141) along the width direction of the fixing frame (141).

5. The method for manufacturing the funnel car according to claim 4, characterized in that, After the step of attaching the fixing frame (141) of the eccentricity measuring ruler (140) to both the first connecting column (100) and the second connecting column (110), and attaching the moving plate (142) of the eccentricity measuring ruler (140) to the transmission shaft (31) and measuring the eccentricity E, the step of connecting the bottom door opening and closing mechanism (30) to both the first shaft support (40) and the second shaft support (50), and connecting the bottom door opening and closing mechanism (30) to the bottom door body (211) of both bottom door structures (21) further includes: Measure the second gap L2 between the bottom door body (211) and the first side beam (13), and measure the third gap L3 between the bottom door body (211) and the second side beam (14). When the second gap L2 meets the third preset interval and the third gap L3 meets the fourth preset interval, the connection between the bottom door opening and closing mechanism (30) and the bottom door body (211) of the two bottom door structures (21) is completed.

6. The method for manufacturing the funnel car according to claim 3, characterized in that, Before the step of connecting the drive shaft positioning template (90) to the connecting pin (60), the method of manufacturing the funnel car includes: Rotate the bottom door body (211) so that the bottom door body (211) fits against both the first side beam (13) and the second side beam (14).

7. The method for manufacturing the funnel car according to claim 3, characterized in that, The step of adjusting the height of the bottom door opening and closing mechanism (30) until the drive shaft (31) of the bottom door opening and closing mechanism (30) is in contact with the positioning arc surface (91) includes: Place the bottom door opening and closing mechanism (30) on the lifting device and adjust the position of the bottom door opening and closing mechanism (30) so that the double lever (33) is aligned with the bottom door hinge (212); The lifting device is used to drive the bottom door opening and closing mechanism (30) to rise until the transmission shaft (31) is in contact with the positioning arc surface (91).

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