A positioning device for railway flat car underframe accessories

Abstract

The present invention relates to a positioning device, and in particular to a positioning device for railway flat car underframe accessories. The purpose of the present invention is to solve the problems of poor position accuracy, low efficiency, weak position correlation, and time-consuming and labor-intensive repeated adjustment of the suspension position during the assembly process when the railway flat car underframe accessories are positioned by the existing marking method, and to provide a positioning device for railway flat car underframe accessories. The device includes a mounting platform, a 1-position center plate support seat, a 2-position center plate and a derailment valve suspension support seat assembly arranged on the mounting platform on the left and right, a 1-position derailment valve suspension support seat and a 2-position derailment valve suspension support seat respectively arranged on the left and right sides of the 1-position center plate support seat, a plurality of support seats corresponding to the remaining accessories of the railway flat car underframe, and a 2-position center plate and a derailment valve suspension support seat assembly including a combination plate, and a 2-position center plate support seat, a 3-position derailment valve suspension support seat, and a 4-position derailment valve suspension support seat arranged on the combination plate.

Description

Technical Field

[0001] The invention relates to a positioning device, in particular to a positioning device for an underframe accessory of a railway flat car. Background Art

[0002] Railway flat cars are one of the main railway vehicles used in logistics. There are many kinds of accessories on their chassis, which are mainly used to fix the brake device (i.e. brake pipe system, including various valves, air cylinders, brake pipes, etc.). The correctness of the position of each accessory on the chassis plays a vital role in the subsequent assembly process of the brake device. These chassis accessories mainly include 120-type control valve (i.e. 120 valve) bracket, brake cylinder bracket, air cylinder bracket, derailment valve bracket, pressure limiting valve bracket, manual brake rod fulcrum seat bracket, etc. The above accessories are distributed on the lower wing surface of the middle beam, the web of the middle beam, the web of the cross beam and the web of the side beam of the railway flat car chassis, and the layout is relatively discrete.

[0003] At present, the marking method is mainly used for positioning the accessories of the railway flat car chassis. The specific process is: mark the installation position of each bracket when designing on the railway flat car chassis, and then weld each bracket at the corresponding position. This method has the following four problems in production:

[0004] First, the positioning accuracy is poor. When marking, some benchmarks cannot be directly marked on the lower wing surface of the center beam, the center beam web, the cross beam web, and the side beam web. They need to be converted with a square ruler, etc., and direct positioning cannot be achieved. After layers of conversion, low accuracy and low efficiency are caused.

[0005] Second, the efficiency is low. The 120 valve bracket, brake cylinder bracket, air cylinder bracket, derailment valve bracket, pressure limiting valve bracket, hand brake lever support bracket and other parts of the chassis need to be marked and positioned one by one before they can be assembled. If the positioning line is marked incorrectly, rework is required in the later process, which affects production efficiency.

[0006] Third, the position correlation is not strong. Since the chassis accessories are used to fix the brake device, sometimes one or more brackets of the same type of a brake device are required, all of which need to be fixed, and there is a strict relative position relationship between the center plate used for positioning and the derailment valve bracket. The single marking positioning in the existing marking method cannot effectively guarantee the position correlation between the brackets.

[0007] Fourth, the position of the support must be adjusted repeatedly during assembly, which is time-consuming and labor-intensive. Since there are many types of flat car chassis accessories, some of the derailment valve supports weigh up to 23.4kg, and their positions need to be adjusted back and forth during assembly, which is very labor-intensive. Summary of the invention

[0008] The purpose of the present invention is to solve the technical problems that when positioning the accessories of the railway flat car underframe by the existing marking method, there are poor positioning accuracy, low efficiency, weak position correlation, repeated adjustment of the support position during the assembly process, and time-consuming and labor-intensive technical problems, and to provide a positioning device for the accessories of the railway flat car underframe.

[0009] To solve the above technical problems, the technical solutions provided by the present invention are as follows:

[0010] A railway flat car underframe accessory positioning device, which is special in that it comprises an installation platform, a 1-position center plate support seat, a 2-position center plate and a derailment valve support seat assembly arranged on the installation platform on the left and right, a 1-position derailment valve support seat and a 2-position derailment valve support seat respectively arranged on the left and right sides of the 1-position center plate support seat, and a plurality of support seats corresponding to other accessories of the railway flat car underframe, wherein the structures of the plurality of support seats are the same as the structure of the 2-position derailment valve support seat; the 2-position center plate and derailment valve support seat assembly comprises a combination plate arranged on the installation platform, a 2-position center plate support seat arranged on the combination plate, and a 3-position derailment valve support seat and a 4-position derailment valve support seat arranged on the combination plate and located on the left and right sides of the 2-position center plate support seat; the 1-position derailment valve support seat, the 2-position derailment valve support seat, the 3-position derailment valve support seat and the 4-position derailment valve support seat are arranged in sequence from left to right;

[0011] The 1-position derailment valve suspension support seat comprises a first air cylinder and a first mounting plate arranged at the telescopic end of the cylinder rod thereof, and a 1-position derailment valve suspension support positioning member arranged on the first mounting plate, and the first air cylinder is arranged on the mounting platform through a first air cylinder bracket;

[0012] The 2-position derailment valve suspension support seat comprises a first guide rail arranged parallel to the mounting platform, a first slider slidably arranged on the first guide rail, a second mounting plate arranged on the first slider, and a 2-position derailment valve suspension support positioning member arranged on the second mounting plate; the first guide rail is arranged on the mounting platform through a first supporting chassis;

[0013] The 2-position center plate support seat comprises a second guide rail arranged parallel to the mounting platform, a second slider slidably arranged on the second guide rail, a third mounting plate arranged on the second slider via a second supporting chassis, and a 2-position center plate positioning member arranged on the third mounting plate; the second guide rail is arranged on the assembly plate via a third connecting plate;

[0014] The 3-position derailment valve suspension support seat comprises a third guide rail arranged on the third support base and parallel to the mounting platform, a third slider slidably arranged on the third guide rail, a fourth mounting plate arranged on the third slider, and a 3-position derailment valve suspension support positioning member arranged on the fourth mounting plate; the third support base is in contact with the combination plate through a first roller group installed at the bottom thereof;

[0015] The 4-position derailment valve suspension support seat comprises a second air cylinder and a fifth mounting plate arranged at the telescopic end of the cylinder rod thereof, and a 4-position derailment valve suspension support positioning member arranged on the fifth mounting plate, and the second air cylinder is arranged on the combination plate through a second air cylinder bracket provided with a second roller group at the bottom;

[0016] The third supporting base is connected to the second air cylinder bracket through a first connecting rod, the third supporting base is connected to the second supporting base through a second connecting rod, and the second air cylinder bracket is connected to the second supporting base through a third connecting rod.

[0017] Furthermore, the 1-position center plate support seat includes a sixth mounting plate arranged on the mounting platform through a fourth supporting base frame and a 1-position center plate positioning member arranged on the sixth mounting plate.

[0018] Furthermore, the rolling directions of the first roller group and the second roller group are consistent with the direction of the second guide rail.

[0019] Furthermore, according to the different structures of the suspension support and the core plate positioning, the 1-position core plate positioning member and the 2-position core plate positioning member both use positioning pins; the 1-position derailment valve suspension support positioning member, the 2-position derailment valve suspension support positioning member, the 3-position derailment valve suspension support positioning member and the 4-position derailment valve suspension support positioning member all use positioning plates.

[0020] Furthermore, in order to ensure connection reliability, the first connecting plate, the second connecting plate, the fourth connecting plate and the combined plate are all welded to the mounting platform.

[0021] Furthermore, depending on the model and requirements of the railway flat car, the remaining accessories can be one or more of a 120-type control valve bracket, a brake cylinder bracket, an air cylinder bracket, a pressure-limiting valve bracket and a manual brake rod fulcrum seat bracket, and there can be one or more of each accessory.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The railway flat car underframe accessory positioning device provided by the present invention is based on the principle that the various underframe accessories of the braking device are related. A 1-position center plate support seat, a 2-position center plate and a derailment valve suspension support seat assembly are arranged on the left and right sides of the installation platform of the positioning device. A 1-position derailment valve suspension support seat and a 2-position derailment valve suspension support seat are respectively arranged on the left and right sides of the 1-position center plate support seat, and the remaining accessories of the railway flat car underframe have their own corresponding support seats. The structures of these support seats are the same as those of the 2-position derailment valve suspension support seats, and all of them are provided with sliding guide rails. The 2-position center plate and the derailment valve suspension support seat assembly are composed of a 2-position center plate support seat arranged on a combination plate, and a 3-position derailment valve suspension support seat and a 4-position derailment valve suspension support seat arranged on the combination plate and located on the left and right sides of the 2-position center plate support seat. These support seats are used to install corresponding center plates or suspensions. Among them, an air brake modular idea is adopted (i.e., the derail valve supports on the derail valve support support seats at both ends (i.e., the 1-position derail valve support support seat and the 4-position derail valve support support seat) are lifted up by air cylinders and connected to the railway flat car underframe), and support seats are designed for positioning key underframe accessories (i.e., all accessories mentioned in the present invention (i.e., various supports), of course, not limited to these accessories, and may also include other types of accessories), so that the relative positions of each support are solidified, forming a modular structure, and the flexible and reliable positioning method of track sliding is used to reduce the marking process and the errors caused by the process, and the position accuracy is significantly improved, the relative positions of each accessory and the braking device are guaranteed, and the correlation between the various accessories of the underframe is significantly enhanced, and the positioning of each support can be achieved at one time, avoiding the back and forth adjustment of the support position, saving manpower and time, improving production efficiency, and meeting the requirements of mass production.

[0024] 2. The railway flat car underframe accessory positioning device provided by the present invention, the 2-position center plate and the derailment valve suspension support seat assembly are designed as a rigid associated body, that is, the 2-position center plate support seat and the 3-position derailment valve suspension support seat and the 4-position derailment valve suspension support seat are associated structures, and the positions of the 2-position center plate and the 3-position derailment valve suspension support are adjusted by linear guide rails at the same time, wherein the 3-position derailment valve suspension support seat and the 4-position derailment valve suspension support seat will change with the change of the center plate spacing of the railway flat car underframe (the center plate spacing corresponds to the vehicle spacing, and the spacing of different vehicles can be different, and correspondingly, the 1-position center plate and the 2-position center plate spacing are also different), which is conducive to ensuring that the relative positions of the 2-position center plate of the railway flat car and the 3-position derailment valve suspension support and the 4-position derailment valve suspension support remain unchanged, and meet the production requirements of vehicles with different spacings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a positioning device for an accessory part of a railway flat car underframe according to an embodiment of the present invention, and the figure does not show a plurality of supporting seats corresponding to other accessories of the railway flat car underframe;

[0026] Figure 2 for Figure 1 A schematic diagram of the structure of the embodiment after installing four derailment valve supports, wherein the 1-position derailment valve support and the 4-position derailment valve support are both lower than the 2-position derailment valve support and the 3-position derailment valve support;

[0027] Figure 3 for Figure 1 Schematic diagram of the structure of the center plate support seat at position 1, the derailment valve support seat at position 1 and the derailment valve support seat at position 2;

[0028] Figure 4 for Figure 3 Schematic diagram of the structure of the derailment valve support seat in the middle position 1;

[0029] Figure 5 for Figure 1 Schematic diagram of the structure of the middle 2-position center plate and the derailment valve suspension support seat assembly;

[0030] Figure 6 for Figure 5 A schematic diagram of the structure in another direction;

[0031] Figure 7 for Figure 5 Schematic diagram of the structure of the middle 4-position derailment valve support support seat;

[0032] Description of reference numerals:

[0033] 1-Installation platform;

[0034] 21-1 center plate support seat, 211- fourth connecting plate, 212- sixth supporting channel steel, 213- sixth mounting plate, 214-1 center plate positioning piece;

[0035] 22-1 derail valve suspension support seat, 221- first connecting plate, 222- first supporting channel steel, 223- first air cylinder, 224- first mounting plate, 225-1 derail valve suspension positioning piece;

[0036] 23-2nd derailment valve suspension support seat, 231-second connecting plate, 232-second supporting channel steel, 233-first connecting plate, 234-first guide rail, 235-first slider, 236-second mounting plate, 237-2nd derailment valve suspension positioning piece;

[0037] 3-2-position center plate and derailment valve suspension support seat assembly, 31-combination plate, 32-2-position center plate support seat, 321-third connecting plate, 322-second guide rail, 323-second slider, 324-second connecting plate, 325-third supporting channel steel, 326-third mounting plate, 327-2-position center plate positioning piece;

[0038] 33-3rd derailment valve suspension support seat, 331-first support seat body, 332-fourth support channel steel, 333-third connection plate, 334-third guide rail, 335-third slider, 336-fourth mounting plate, 337-first roller group, 338-3rd derailment valve suspension positioning piece;

[0039] 34-4-position derailment valve suspension support seat, 341-second support seat body, 342-fifth support channel steel, 343-second air cylinder, 344-fifth mounting plate, 345-second roller group, 346-4-position derailment valve suspension positioning piece;

[0040] 35-first connecting rod, 36-second connecting rod, 37-third connecting rod;

[0041] 41-1 derailment valve lifting support, 42-2 derailment valve lifting support, 43-3 derailment valve lifting support, 44-4 derailment valve lifting support. DETAILED DESCRIPTION

[0042] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0043] The railway flat car underframe accessory positioning device provided by the present invention is as follows: Figures 1 to 7 As shown, it includes an installation platform 1, a 1-position center plate support seat 21, a 2-position center plate and a derailment valve support seat assembly 3 arranged on the installation platform 1 on the left and right, a 1-position derailment valve support support seat 22 and a 2-position derailment valve support support seat 23 respectively arranged on the left and right sides of the 1-position center plate support seat 21, and a plurality of support seats corresponding to the remaining accessories of the railway flat car chassis (including one or more of the 120 valve support, brake cylinder support, air cylinder support (including 28-liter air cylinder support, auxiliary air cylinder support, 11-liter air cylinder support), pressure limiting valve support and manual brake rod fulcrum seat support, each of which has one or more accessories), and the structures of the plurality of support seats are the same as the structure of the 2-position derailment valve support support seat 23. Each support seat is based on the longitudinal and transverse center lines of the bolster beam and is installed according to the set position when the railway flat car chassis accessories are designed.

[0044] 2-position center plate and derailment valve suspension support seat assembly 3 comprises a combination plate 31, 2-position center plate support seats 32 arranged on the combination plate 31, and 3-position derailment valve suspension support seats 33 and 4-position derailment valve suspension support seats 34 arranged on the combination plate 31 and positioned at the left and right sides of the 2-position center plate support seats 32; 1-position derailment valve suspension support seat 22, 2-position derailment valve suspension support seats 23, 3-position derailment valve suspension support seats 33, 4-position derailment valve suspension support seats 34 are arranged successively from left to right, among the suspensions installed on these four support seats, 1-position derailment valve suspension support 41 and 4-position derailment valve suspension support 44 are all lower than 2-position derailment valve suspension support 42 and 3-position derailment valve suspension support 43, so that the suspension is connected with the flat car underframe after being lifted up by the air cylinder during installation. The first center plate support seat 21 includes a fourth connecting plate 211, a sixth supporting channel steel 212 and a sixth mounting plate 213, wherein the fourth connecting plate 211 and the sixth supporting channel steel 212 together constitute a fourth supporting chassis; the sixth mounting plate 213 is arranged on the fourth connecting plate 211 through the sixth supporting channel steel 212, the fourth connecting plate 211 is arranged on the mounting platform 1, and the sixth mounting plate 213 is provided with a first center plate positioning member 214; the first derailment valve suspension support seat 22 includes a first connecting plate 221, a first supporting channel steel 222, a first air cylinder 223 and a first mounting plate 224, wherein the first connecting plate 221 and the first supporting channel steel 222 together serve as a first air cylinder bracket; the first air cylinder 223 is installed on the first connecting plate 221 through the first supporting channel steel 222, the first connecting plate 221 is arranged on the mounting platform 1, and the elongation direction of the air cylinder rod is vertical and away from the mounting Platform 1, a first mounting plate 224 is mounted on the telescopic end of the air cylinder rod, and a 1-position derailment valve suspension positioning member 225 is provided on the first mounting plate 224; the 2-position derailment valve suspension support seat 23 includes a second connecting plate 231, a second supporting channel steel 232, a first connecting plate 233, a first guide rail 234, a first slider 235 and a second mounting plate 236, wherein the second connecting plate 231, the second supporting channel steel 232 and the first connecting plate 233 together serve as a first supporting chassis; the second supporting channel steel 232 is arranged on the mounting platform 1 through the second connecting plate 231, the first guide rail 234 is arranged on the second supporting channel steel 232 through the first connecting plate 233, the first slider 235 is arranged at the bottom of the second mounting plate 236 and is slidably arranged on the first guide rail 234, the first guide rail 234 is parallel to the mounting platform 1, and a 2-position derailment valve suspension positioning member 237 is provided on the second mounting plate 236.

[0045] The two-position center plate support seat 32 includes a third connecting plate 321, a second guide rail 322, a second slider 323, a second connecting plate 324, a third support channel steel 325 and a third mounting plate 326, wherein the second connecting plate 324 and the third support channel steel 325 together serve as a second support chassis; the second guide rail 322 is arranged on the combination plate 31 through the third connecting plate 321, the second slider 323 is arranged at the bottom of the connecting plate and is slidably arranged on the second guide rail 322, the second guide rail 322 is parallel to the mounting platform 1, the third mounting plate 326 is arranged on the connecting plate through the third support channel steel 325, and the third mounting plate 326 is provided with a two-position center plate support seat 32 The center plate positioning member 327; the 3-position derailment valve suspension support seat 33 includes a first support seat body 331, a fourth support channel steel 332, a third connecting plate 333, a third guide rail 334, a third slider 335 and a fourth mounting plate 336, wherein the first support seat body 331, the fourth support channel steel 332 and the third connecting plate 333 together serve as a third support chassis; the first support seat body 331 contacts the combination plate 31 through a first roller group 337 installed at its bottom, the third guide rail 334 is arranged on the fourth support channel steel 332 through the third connecting plate 333, the fourth support channel steel 332 is arranged on the first support seat body 331, and the third slider 33 5 is arranged at the bottom of the fourth mounting plate 336 and is slidably arranged on the third guide rail 334, the third guide rail 334 is parallel to the mounting platform 1, and a 3-position derailment valve suspension positioning member 338 is arranged on the fourth mounting plate 336; the 4-position derailment valve suspension support seat 34 includes a second support seat body 341, a fifth support channel steel 342, a second air cylinder 343 and a fifth mounting plate 344, wherein the second support seat body 341 and the fifth support channel steel 342 together form a second air cylinder bracket; the second support seat body 341 contacts with the combination plate 31 through the second roller group 345 installed at the bottom thereof, and the second air cylinder 343 is installed on the combination plate 31 through the fifth support channel steel 342 On the second support seat body 341, the extension direction of the air cylinder rod is vertical and away from the mounting platform 1, the fifth mounting plate 344 is installed at the telescopic end of the air cylinder rod, and the fifth mounting plate 344 is provided with a 4-position derailment valve suspension positioning member 346; the rolling directions of the first roller group 337 and the second roller group 345 are consistent with the direction of the second guide rail 322; the first support seat body 331 is connected to the second support seat body 341 through the first connecting rod 35, the first support seat body 331 is connected to the third support channel steel 325 through the second connecting rod 36, and the second support seat body 341 is connected to the third support channel steel 325 through the third connecting rod 37.

[0046] The first connecting plate 221, the second connecting plate 231, the fourth connecting plate 211, and the combined plate 31 are all welded to the mounting platform 1. The first-position center plate positioning member 214 and the second-position center plate positioning member 327 are both positioning pins; the first-position derailment valve suspension positioning member 225, the second-position derailment valve suspension positioning member 237, the third-position derailment valve suspension positioning member 338, and the fourth-position derailment valve suspension positioning member 346 are all positioning plates.

[0047] The installation process of each accessory on the positioning device is as follows:

[0048] Place the railway flat car chassis on top of the positioning device, align the 1st center plate of the railway flat car chassis with the 1st center plate support seat of the positioning device, adjust the 2nd center plate support seat to align it with the 2nd center plate of the railway flat car chassis, and fix the entire railway flat car chassis on the two center plate support seats. Install each railway flat car chassis accessory (including all derailment valve brackets) on their respective support seats on the above-mentioned positioning device, move each slider, and spot weld each bracket after it contacts the railway flat car chassis, then lift the 1st derailment valve bracket and the 4th derailment valve bracket through the air cylinder to the corresponding position on the lower wing surface of the middle beam of the railway flat car chassis, and spot weld them. In this way, the positioning (or assembly) of each accessory (i.e., each bracket) and the railway flat car chassis is completed.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. For ordinary professional and technical personnel in the field, the specific technical solutions recorded in the aforementioned embodiments can be modified, or some of the technical features therein can be replaced by equivalents, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions protected by the present invention.

Claims

1. A positioning device for an underframe accessory of a railway flat car, characterized in that: The invention comprises an installation platform (1), a 1-position center plate support seat (21), a 2-position center plate and a derailment valve suspension support seat assembly (3) arranged on the installation platform (1) on the left and the right, a 1-position derailment valve suspension support seat (22) and a 2-position derailment valve suspension support seat (23) respectively arranged on the left and right sides of the 1-position center plate support seat (21), and a plurality of support seats corresponding to other accessory parts of the railway flat car underframe, wherein the structures of the plurality of support seats are the same as the structure of the 2-position derailment valve suspension support seat (23); the 2-position center plate and derailment valve suspension support seat assembly The component (3) comprises a combined plate (31) arranged on the installation platform (1), a two-position center plate support seat (32) arranged on the combined plate (31), and a three-position derailment valve support seat (33) and a four-position derailment valve support seat (34) arranged on the combined plate (31) and located on the left and right sides of the two-position center plate support seat (32); the one-position derailment valve support seat (22), the two-position derailment valve support seat (23), the three-position derailment valve support seat (33), and the four-position derailment valve support seat (34) are arranged in sequence from left to right; The 1-position derailment valve suspension support seat (22) comprises a first air cylinder (223) and a first mounting plate (224) arranged at the telescopic end of the cylinder rod thereof, and a 1-position derailment valve suspension positioning member (225) arranged on the first mounting plate (224); the first air cylinder (223) is arranged on the installation platform (1) via a first air cylinder bracket; The 2-position derailment valve suspension support seat (23) comprises a first guide rail (234) arranged parallel to the installation platform (1), a first slider (235) slidably arranged on the first guide rail (234), a second installation plate (236) arranged on the first slider (235), and a 2-position derailment valve suspension positioning member (237) arranged on the second installation plate (236); the first guide rail (234) is arranged on the installation platform (1) via a first support base frame; The two-position center plate support seat (32) comprises a second guide rail (322) arranged parallel to the installation platform (1), a second slider (323) slidably arranged on the second guide rail (322), a third mounting plate (326) arranged on the second slider (323) via a second supporting base, and a two-position center plate positioning member (327) arranged on the third mounting plate (326); the second guide rail (322) is arranged on the combination plate (31) via a third connecting plate (321); The 3-position derailment valve suspension support seat (33) comprises a third guide rail (334) arranged on a third support base frame and parallel to the installation platform (1), a third slider (335) slidably arranged on the third guide rail (334), a fourth installation plate (336) arranged on the third slider (335), and a 3-position derailment valve suspension positioning member (338) arranged on the fourth installation plate (336); the third support base frame contacts the combination plate (31) via a first roller group (337) installed at the bottom thereof; The 4-position derailment valve suspension support seat (34) comprises a second air cylinder (343) and a fifth mounting plate (344) arranged at the telescopic end of the cylinder rod thereof, and a 4-position derailment valve suspension positioning member (346) arranged on the fifth mounting plate (344); the second air cylinder (343) is arranged on the combination plate (31) via a second air cylinder bracket having a second roller group (345) at the bottom; The third supporting base is connected to the second air cylinder bracket via a first connecting rod (35), the third supporting base is connected to the second supporting base via a second connecting rod (36), and the second air cylinder bracket is connected to the second supporting base via a third connecting rod (37).

2. The railway flat car underframe accessory positioning device according to claim 1, characterized in that: The 1-position center plate support seat (21) comprises a sixth mounting plate (213) arranged on the mounting platform (1) via a fourth supporting base frame and a 1-position center plate positioning member (214) arranged on the sixth mounting plate (213).

3. The railway flat car underframe accessory positioning device according to claim 2, characterized in that: The rolling directions of the first roller group (337) and the second roller group (345) are both consistent with the direction of the second guide rail (322).

4. The railway flat car underframe accessory positioning device according to claim 3, characterized in that: The 1-position center plate positioning member (214) and the 2-position center plate positioning member (327) both use positioning pins; the 1-position derailment valve suspension positioning member (225), the 2-position derailment valve suspension positioning member (237), the 3-position derailment valve suspension positioning member (338) and the 4-position derailment valve suspension positioning member (346) all use positioning plates.

5. The railway flat car underframe accessory positioning device according to claim 4, characterized in that: The first connecting plate (221), the second connecting plate (231), the fourth connecting plate (211), and the combined plate (31) are all welded to the installation platform (1).

6. The railway flat car underframe accessory positioning device according to any one of claims 1 to 5, characterized in that: The remaining accessories are one or more of a 120-type control valve support, a brake cylinder support, an air cylinder support, a pressure-limiting valve support and a manual brake rod fulcrum seat support, and each accessory has one or more.

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