Module-adjustable display sand table for railway

Abstract

The utility model provides a module-adjustable display sand table for a railway, which belongs to the technical field of railway sand tables and comprises a sand table seat provided with a railway model, and a lifting mechanism is arranged between the sand table seat and a base. A plurality of splicing seats are sequentially and uniformly arranged in the sand table seat, the upper surfaces of the splicing seats and the upper surface of the sand table seat are located on the same plane, clamping seats connected with the bottoms of the sand table modules are inserted into inner cavities of the splicing seats, the clamping seats are fixed to the bottoms of the sand table modules in an attached mode, and the clamping seats are embedded into the inner walls of the splicing seats; a locking assembly is arranged between the clamping seat and the splicing seat, the clamping seat is fixed in the splicing seat through the locking assembly, namely, the sand table module is fixed on the sand table seat, and the clamping seat can be taken out from the interior of the splicing seat through the locking assembly, so that the position of the sand table module can be adjusted; therefore, convenience is brought to the sand table display process.

Description

Technical Field

[0001] The utility model relates to the technical field of railway sand tables, in particular to a modular adjustable display sand table for railways. Background Art

[0002] Sand table is a model made of mud and sand according to the topographic map. It is divided into topographic sand table, construction sand table, electronic sand table, etc. When simulating railway construction, the railway track is simulated through the sand table to match the actual situation, thereby ensuring the efficiency of construction;

[0003] A related art (publication number: CN215679826U) discloses a railway teaching sand table model, and the disclosed technical solution is as follows: the sand table to be displayed is placed in a suitable position, and then the handle is turned to drive the screw rod to rotate, the adjustment block moves on the screw rod, and the lifting plate is driven to move up through the linkage rod, and the model assembly on the lifting plate is moved out for easy viewing, and at the same time the arc rod moves up, and under the action of the linkage rods on both sides of the fixed rod, the sliding block moves to both sides and drives the movable plate to move, and the movable plate is opened. Under the action of the LED light, the model is illuminated for convenient observation by personnel, and when not in use, the handle is turned in the opposite direction to drive the screw rod to reverse, the lifting plate moves down, and the movable plate is recovered and descended at the same time to achieve sealing, which can effectively protect the sand table model and has good safety;

[0004] In the above disclosed technical solutions, the following problems are found in the related technologies: during the railway construction, due to different road conditions, there will be diversity in the railway construction. In the process of displaying through the sand table, if the module position cannot be adjusted, it will be impossible to change the module position according to the actual situation, thereby affecting the display effect of the sand table. After multiple plug-in and mating of the sand table module, the tightness between the sand table module and the sand table seat will decrease, resulting in the sand table module falling off during the movement of the sand table. In this regard, we propose a modular adjustable display sand table for railways;

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background technology section of this application, and therefore may include prior art information that does not constitute known to ordinary technicians in the field. Utility Model Content

[0006] The utility model aims to solve at least one of the technical problems existing in the prior art or related technology. In order to solve the problem of module position adjustment existing in the above-mentioned prior art, the utility model provides a modular adjustable display sand table for railways, which adopts a module connection position adjustment mechanism combined with a sand table height adjustment mechanism to achieve the effect of facilitating the adjustment of the position of the sand table model. The specific technical solution is:

[0007] A modular adjustable display sand table for railways, comprising a sand table base with a railway model installed, a base is arranged below the sand table base, and a lifting mechanism is arranged between the sand table base and the base, the side walls of the sand table base are evenly provided with splicing seats for positioning modules, the inner cavity of the splicing seat is plugged with a clamping seat connected to the bottom of the module, a locking assembly is arranged between the clamping seat and the splicing seat, the locking assembly includes a rebound clamping piece arranged in the inner cavity of the clamping seat, a clamping groove is circumferentially opened on the inner wall of the splicing seat close to the bottom, and the rebound clamping piece is clamped inside the clamping groove.

[0008] In the above technical solution, the rebound clamp includes a slide rod, the slide rod is arranged in the inner cavity of the clamping seat, the inner cavity of the clamping seat is embedded with a support seat, and the support seat is sleeved on the outside of the slide rod, the outside of the slide rod is sleeved with a movable seat, a first elastic member is arranged between the movable seat and the support seat, and the first elastic member is sleeved on the outside of the slide rod, and a clamping component clamped in the inside of the splicing seat is arranged below the slide rod.

[0009] The clamping component includes a clamping block, and the outer wall of the clamping seat near the bottom is evenly circumferentially provided with through grooves, the clamping block is arranged inside the through grooves, a movable rod is fixedly installed on the outer wall of the clamping block, and a touch block is fixedly installed on the other end of the movable rod, and the clamping block corresponds to the clamping groove.

[0010] A positioning hole is provided on the outer wall of the clamping seat near the top, and the positioning hole passes through the inner cavity of the clamping seat. A locking rod is inserted into the inner cavity of the positioning hole. The opposite ends of the locking rod and the sliding rod are both arranged as inclined surfaces. A positioning seat is fixedly installed on the end of the locking rod located outside the clamping seat.

[0011] A second elastic member is sleeved on the outside of the movable rod, and the second elastic member is arranged between the inner wall of the through slot and the touch block.

[0012] The sand table seat includes an upper seat body and a lower seat body, and the upper seat body is fitted and fixed to the lower seat body, the side wall of the upper seat body is evenly provided with through holes, the splicing seat is fixedly installed on the side of the lower seat body opposite to the upper seat body, and the splicing seat is inserted into the inside of the through hole.

[0013] A groove is provided on one side of the upper seat body relative to the lower seat body, and the through hole is arranged in the groove. An outer frame is fixedly installed on one side of the lower seat body relative to the upper seat body, and the splicing seat is arranged in the outer frame, and the outer frame corresponds to the groove.

[0014] The lifting mechanism includes a scissors frame, each end of the scissors frame is rotatably provided with a connecting seat, the side wall of the connecting seat is fixedly installed with a guide seat, the sand table seat and the opposite side walls of the base are fixedly installed with guide rods, the guide seat is sleeved on the outside of the guide rod, and an electric telescopic part is provided between the base and the scissors frame.

[0015] The movable end of the electric telescopic member is rotatably arranged on an outer wall of a rod body of the scissors frame, and the other end of the electric telescopic member is rotatably arranged on a side wall of the base.

[0016] A support rod is fixedly installed on one side of the sand table seat opposite to the base, and a support tube is fixedly installed on one side of the base opposite to the sand table seat, and the support tube is sleeved on the outside of the support rod.

[0017] Compared with the prior art, the utility model has the following beneficial effects: the railway module adjustable display sand table

[0018] 1. When the position of the sandbox module needs to be adjusted, the locking rod is taken out from the positioning hole, and the elastic force of the first elastic member is used to make the movable seat drive the sliding rod to move away from the center of multiple circumferential touch blocks. At this time, multiple touch blocks are aggregated to the inside of the card seat through the second elastic member arranged in the through groove, and then the card seat is taken out from the inside of the splicing seat. After that, the position of the sandbox module is adjusted to match and fix with the splicing seats at other positions. The position of the sandbox module is adjusted according to the simulated actual situation, thereby bringing convenience to the relevant personnel in displaying the operation of the sandbox process.

[0019] Second, the upper end of the splicing seat is flush with the upper surface of the sand table seat, so that the splicing seat is hidden inside the sand table seat, making the installation and operation process of the sand table module more beautiful.

[0020] 3. When adjusting the height of the sand table, the movable end of the electric telescopic part drives a rod of the scissors frame to move, so that the four ends of the scissors frame respectively drive the guide seat to slide on the outer wall of the guide rod through the hinged connecting seat. As the scissors frame folds and changes, the sand table seat is lifted to a suitable height position, and the position of the sand table seat is adjusted according to the placement of the sand table seat, so that the railway sand table can be displayed more clearly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of a modular adjustable display sand table for railways in the utility model. Figure 1 ;

[0022] Figure 2 This is a schematic diagram of the structure of a modular adjustable display sand table for railways in the utility model. Figure 2 ;

[0023] Figure 3The schematic diagram of the structural relationship between the upper seat and the lower seat of the utility model Figure 1 ;

[0024] Figure 4 The schematic diagram of the structural relationship between the upper seat and the lower seat of the utility model Figure 2 ;

[0025] Figure 5 It is a partial structural schematic diagram of the locking assembly of the utility model;

[0026] Figure 6 for Figure 5 Schematic diagram of structural explosion;

[0027] Figure 7 It is a partial structural schematic diagram of the lifting mechanism of the utility model;

[0028] Figure 8 for Figure 6 A local enlarged view of point A;

[0029] in, Figures 1 to 8 The correspondence between the figure numbers and the component names is: 1-sand table seat, 2-lifting mechanism, 3-base, 4-support cylinder, 5-support rod, 6-joining seat, 7-perforation, 8-outer frame, 9-groove, 10-clamping seat, 11-upper seat body, 12-lower seat body, 13-locking rod, 14-positioning seat, 15-positioning hole, 16-block, 17-through groove, 18-slot, 19-first elastic member, 20-support seat, 21-scissors frame, 22-connecting seat, 23-guide seat, 24-guide rod, 25-electric telescopic member, 30-slide rod, 31-movable seat, 32-touch block, 33-movable rod, 34-second elastic member. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] The following is a combination of specific implementation cases and attached Figure 1-8 The present invention is further described below, but the present invention is not limited to these embodiments.

[0032] A modular adjustable display sand table for railways, comprising a sand table seat 1 with a railway model installed, a base 3 is arranged below the sand table seat 1, and a lifting mechanism 2 is arranged between the sand table seat 1 and the base 3. The height position of the sand table seat 1 is adjusted by the lifting mechanism 2, so that the sand table can be adjusted according to the placement position during display, so that the viewers can understand the railway sand table situation more clearly. The side walls of the sand table seat 1 are evenly provided with splicing seats 6 for positioning the sand table modules. Multiple splicing seats 6 are evenly arranged inside the sand table seat 1 in sequence, and the upper surface of the splicing seat 6 is on the same plane as the upper surface of the sand table seat 1.

[0033] The inner cavity of the splicing seat 6 is plugged with a clamping seat 10 connected to the bottom of the sandbox module. The clamping seat 10 is fixed to the bottom of the sandbox module, and the clamping seat 10 is embedded into the inner wall of the splicing seat 6, so that the sandbox module is fixed to the surface of the sandbox seat 1. A locking component is provided between the clamping seat 10 and the splicing seat 6. The clamping seat 10 is fixed inside the splicing seat 6 by the locking component, that is, the sandbox module is fixed on the sandbox seat 1.

[0034] With the above structure, the card seat 10 can be taken out from the inside of the splicing seat 6 through the locking assembly, so that the position of the sand table module can be adjusted, thereby bringing convenience to the sand table display process.

[0035] Among them, the locking assembly includes a slide bar 30, and the slide bar 30 is arranged in the inner cavity of the clamping seat 10. The inner cavity of the clamping seat 10 is embedded with a support seat 20, and the support seat 20 is sleeved on the outside of the slide bar 30. The support seat 20 is fixedly embedded and installed on the inner wall of the clamping seat 10, and a through hole penetrating the inner cavity is opened on the surface of the clamping seat 20. The aperture of the through hole corresponds to the slide bar 30, so that the support seat 20 slides on the outer wall of the slide bar 30. The outside of the slide bar 30 is sleeved with a movable seat 31. The movable seat 31 is fixedly sleeved on the outside of the slide bar 30 through the mounting hole opened on the surface, so that the movable seat 31 moves in the inner cavity of the clamping seat 10 with the slide bar 30.

[0036] A first elastic member 19 is provided between the movable seat 31 and the support seat 20, and the first elastic member 19 is sleeved on the outside of the slide bar 30. The first elastic member 19 can be a compression spring, and the two ends of the first elastic member 19 are respectively fixed on the opposite surfaces of the support seat 20 and the movable seat 31, and the first elastic member 19 is sleeved on the outside of the slide bar 30, so that the first elastic member 19 fits the outer wall of the slide bar 30 to telescopically slide. The outer wall of the clamping seat 10 near the bottom is uniformly provided with through grooves 17 in the circumferential direction, and the outer surface of the clamping seat 10 near the lower end is sequentially provided with a circle of through grooves 17, and the through grooves 17 are connected with the inner cavity of the clamping seat 10. A clamping block 16 is provided in the through groove 17, and a movable rod 33 is fixedly installed on the outer wall of the clamping block 16, and a touch block 32 is fixedly installed on the other end of the movable rod 33. The spherical clamping block 16 slides in contact with the inner wall of the through groove 17, so that the spherical clamping block 16 drives the touch block 32 to move through the movable rod 33. The contact blocks 32 are also spherical, so that when the slide bar 30 is forced to move downward, the plurality of contact blocks 32 in the circumferential direction are dispersed in the circumferential direction due to the squeezing force of the slide bar 30 .

[0037] The inner wall of the splicing seat 6 near the bottom is provided with a slot 18 in the circumferential direction, and the slot 18 corresponds to the block 16. When the sandbox module is fixed on the surface of the sandbox seat 1, the snap seat 10 is fixed on the bottom of the sandbox module. Then the snap seat 10 is inserted into the interior of the splicing seat 6, and the slide bar 30 is pushed downward at the same time, so that the slide bar 30 is subjected to force on multiple circumferential touch blocks 32 inside the snap seat 10. The multiple spherical touch blocks 32 in the circumferential direction are dispersed circumferentially by the extrusion force, so that each touch block 32 drives each block 16 to be clamped in the slot 18 through the movable rod 33, and then the position of the slide bar 30 is locked by bolts or other fixings, so that the sandbox module is fixed on the sandbox seat 1.

[0038] With the above structure, when the position of the sandbox module needs to be adjusted, the locking piece at the position of the slide bar 30 is taken out. The elastic force of the first elastic piece 19 is used to make the movable seat 31 drive the slide bar 30 to move away from the center of the multiple touch blocks 32 in the circumferential direction. At this time, the multiple touch blocks 32 are aggregated to the inside of the card seat 10 through the second elastic piece 34 arranged inside the through groove 17, and then the card seat 10 is taken out from the inside of the splicing seat 6. After that, the position of the sandbox module is adjusted to match and fix with the splicing seat 6 at other positions, and the position of the sandbox module is adjusted according to the actual situation of simulation, so as to bring convenience to the operation of relevant personnel in displaying the sandbox process.

[0039] It is worth noting that a positioning hole 15 is provided on the outer wall of the card seat 10 near the top, and the positioning hole 15 passes through the inner cavity of the card seat 10. The inner cavity of the positioning hole 15 is plugged with a locking rod 13, and the opposite ends of the locking rod 13 and the slide bar 30 are both set as inclined surfaces, and the end of the locking rod 13 outside the card seat 10 is fixedly installed with a positioning seat 14. The arc-shaped positioning seat 14 is attached to the surface of the card seat 10 along with the locking rod 13. Then the positioning seat 14 is fixed to the surface of the card seat 10 by bolts, and a positioning hole 15 that passes through the inner cavity is provided on the outer wall of the card seat 10 near the upper defense. When the locking rod 13 passes through the inside of the positioning hole 15. The inclined surface is in contact with the inclined surface of the slide bar 30, and as the locking rod 13 moves, the inclined surface of the slide bar 30 is subjected to extrusion force. The slide bar 30 moves downward, so that a plurality of card blocks 16 are carded in the inside of the card slot 18.

[0040] With the above structure, the positioning seat 14 is attached to the outer wall of the clamping seat 10 and fixed to the outer wall of the clamping seat 10 by bolts. Thus, the stability of the connection between the sand table module and the sand table seat 1 is ensured. When adjusting the position of the sand table module, the bolts between the positioning seat 14 and the outer wall of the clamping seat 10 are removed, and then the locking rod 13 is taken out from the inside of the positioning hole 15. At this time, the slide bar 30 is reset by the elastic force of the first elastic member 19, making the operation of the position adjustment process more convenient.

[0041] In addition, the second elastic member 34 is sleeved on the outside of the movable rod 33, and the second elastic member 34 is arranged between the inner wall of the through slot 17 and the touch block 32. The second elastic member 34 can be a compression spring, one end of the second elastic member 34 is fixed to the inner wall of the through slot 17, and the other end of the second elastic member 34 is fixed to the outer wall of the touch block 32. The other end of the second elastic member 32 can also be fixed to the outer wall of the clamping block 16, and through the elastic force of the second elastic member 34. After the slide rod 30 is taken out from the inside of the clamping seat 10, the clamping block 16 can be reset to the inside of the clamping seat 10, thereby preventing the clamping seat 10 from being stuck inside the splicing seat 6.

[0042] In addition, the sand table seat 1 includes an upper seat body 11 and a lower seat body 12, and the upper seat body 11 and the lower seat body 12 are fitted and fixed. After the upper seat body 11 and the lower seat body 12 are fitted on opposite surfaces, they are fixed by bolts or other locking parts. The side wall of the upper seat body 11 is evenly provided with perforations 7, and the splicing seat 6 is fixedly installed on the side of the lower seat body 12 relative to the upper seat body 11, and the splicing seat 6 is inserted into the inside of the perforation 7. The splicing seat 6 is located inside the sand table seat 1, and the upper end of the splicing seat 6 is flush with the upper surface of the sand table seat 1, so that the splicing seat 6 is hidden inside the sand table seat 1. The process of installing the sand table module is made more beautiful.

[0043] Furthermore, a groove 9 is provided on one side of the upper seat body 11 relative to the lower seat body 12, and the through hole 7 is provided in the groove 9. An outer frame 8 is fixedly installed on one side of the lower seat body 12 relative to the upper seat body 11, and the splicing seat 6 is provided in the outer frame 8, and the outer frame 8 corresponds to the groove 9. When the upper seat body 11 and the lower seat body 12 are butt-jointed, the outer frame 8 is clamped in the groove 9, and the outer frame 8 increases the stability of the outer periphery of the splicing seat 6.

[0044] The lifting mechanism 2 includes a scissor frame 21, each end of which is rotatably provided with a connecting seat 22, and a guide seat 23 is fixedly installed on the side wall of the connecting seat 22. The scissor frame 21 is composed of two rods hinged to each other, that is, the two rods of the scissor frame 21 are movably sleeved on the outside of the same shaft through a mounting hole opened at the center position. The shaft is installed inside the connecting seat 22, and the four ends of the scissor frame 21 are movably sleeved on the outside of the shaft inside each connecting seat 22 through the mounting holes opened by the connecting piece, so that the four ends of the scissor frame 21 are rotatably connected to the guide seat 23 through the connecting seat 22.

[0045] The opposite side walls of the sand table seat 1 and the base 3 are fixedly mounted with guide rods 24, and the guide seat 23 is sleeved on the outside of the guide rods 24. Two plates are fixedly mounted parallel to each other on the opposite surfaces of the sand table seat 1 and the base 3, and the guide rods 24 are fixedly mounted between the two plates, so that the two guide rods 24 are fixed parallel to each other on the opposite surfaces of the sand table seat 1 and the base 3. The guide seat 23 is movably sleeved on the outside of the guide rod 24 through the mounting holes opened on the surface, so that the guide seat 23 slides on the outer wall of the guide rod 24. An electric telescopic member 25 is arranged between the base 3 and the scissor frame 21.

[0046] With the above structure, when adjusting the height of the sand table, the electric telescopic member 25 is connected to the power supply, so that the movable end of the electric telescopic member 25 drives one rod of the scissor frame 21 to move. The two rods of the scissor frame 21 are folded horizontally, so that the four ends of the scissor frame 21 respectively drive the guide seat 23 to slide against the outer wall of the guide rod 24 through the hinged connection seat 22. In this way, the sand table seat 1 is lifted to a suitable height position, and the position of the sand table seat 1 is adjusted according to the position of the sand table seat 1, so that the railway sand table is displayed more clearly.

[0047] The movable end of the electric telescopic member 25 is rotatably mounted on the outer wall of a rod of the scissor frame 21, and the other end of the electric telescopic member 25 is rotatably mounted on the side wall of the base 3. A seat body is fixedly mounted on the upper surface of the base 3, and another seat body is fixedly mounted on the surface of a rod of the scissor frame 21, and shaft bodies are installed inside the two seat bodies. The two ends of the electric telescopic member 25 are movably sleeved on the outside of the shaft bodies inside the two seat bodies through the mounting holes opened by the connecting member, and the folding and unfolding of the scissor frame 21 are adjusted by the electric telescopic member 25, so that the operation of the height position adjustment process of the sand table seat 1 is more convenient.

[0048] A support rod 5 is fixedly installed on one side of the sand table seat 1 relative to the base 3, and a support tube 4 is fixedly installed on one side of the base 3 relative to the sand table seat 1, and the support tube 4 is sleeved on the outside of the support rod 5. The support tube 4 is movably sleeved on the outside of the support rod 5 through a mounting hole opened on the surface. In the process of adjusting the height of the sand table seat 1 by folding and changing the scissor frame 21, the sand table seat 1 drives the support rod 5 to slide on the inner wall of the support tube 4, and the stability of the position adjustment process of the sand table seat 1 is ensured by limiting the position of multiple support rods 4 in the vertical direction.

[0049] The present embodiment is a modular adjustable display sand table for railways, and the working principle is as follows: when the sand table module is fixed on the surface of the sand table seat 1, the clamping seat 10 is fixed on the bottom of the sand table module, and then the clamping seat 10 is inserted into the interior of the splicing seat 6, and then the locking rod 13 is passed through the interior of the positioning hole 15. As the locking rod 13 moves, the inclined surface of the slide bar 30 is subjected to an extrusion force, so that the slide bar 30 moves downward, so that the slide bar 30 is subjected to a force on multiple circumferential touch blocks 32 inside the clamping seat 10, so that multiple spherical touch blocks in the circumferential direction are pressed. 32 is spread out circumferentially by the extrusion force, so that each touch block 32 drives each card block 16 to be carded in the inside of the card slot 18 through the movable rod 33, and then the positioning seat 14 is attached to the outer wall of the card seat 10 and fixed to the outer wall of the card seat 10 by bolts. When adjusting the position of the sand table module, the bolts between the positioning seat 14 and the outer wall of the card seat 10 are removed, and then the locking rod 13 is taken out from the positioning hole 15. At this time, the sliding rod 30 is reset by the elastic force of the first elastic member 19, and then the position of the sand table module is adjusted for installation.

[0050] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0051] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0052] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A modular adjustable display sand table for railways, comprising a sand table seat (1) on which a railway model is installed, a base (3) is arranged below the sand table seat (1), and a lifting mechanism (2) is arranged between the sand table seat (1) and the base (3), characterized in that: The side walls of the sand table seat (1) are evenly provided with splicing seats (6) for positioning the module, the inner cavity of the splicing seat (6) is plugged with a snap-in seat (10) connected to the bottom of the module, a locking assembly is provided between the snap-in seat (10) and the splicing seat (6), the locking assembly includes a rebound clip arranged in the inner cavity of the snap-in seat (10), a slot (18) is circumferentially opened on the inner wall of the splicing seat (6) close to the bottom, and the rebound clip is snap-fitted into the inside of the slot (18).

2. The modular adjustable display sand table for railway according to claim 1, characterized in that: The rebound clamp includes a slide rod (30), the slide rod (30) is arranged in the inner cavity of the clamping seat (10), the inner cavity of the clamping seat (10) is embedded with a support seat (20), and the support seat (20) is sleeved on the outside of the slide rod (30), the outside of the slide rod (30) is sleeved with a movable seat (31), a first elastic member (19) is arranged between the movable seat (31) and the support seat (20), and the first elastic member (19) is sleeved on the outside of the slide rod (30), and a clamping member that is clamped to the inside of the splicing seat (6) is arranged below the slide rod (30).

3. The modular adjustable display sand table for railway according to claim 2, characterized in that: The clamping component comprises a clamping block (16); an outer wall of the clamping seat (10) close to the bottom is evenly provided with a through groove (17) in the circumferential direction; the clamping block (16) is arranged inside the through groove (17); a movable rod (33) is fixedly mounted on the outer wall of the clamping block (16); a touch block (32) is fixedly mounted on the other end of the movable rod (33); and the clamping block (16) corresponds to the clamping groove (18).

4. The modular adjustable display sand table for railway according to claim 2, characterized in that: A positioning hole (15) is provided on the outer wall of the clamping seat (10) near the top, and the positioning hole (15) passes through the inner cavity of the clamping seat (10). A locking rod (13) is inserted into the inner cavity of the positioning hole (15). The opposite ends of the locking rod (13) and the sliding rod (30) are both arranged as inclined surfaces, and a positioning seat (14) is fixedly installed on the end of the locking rod (13) located outside the clamping seat (10).

5. The modular adjustable display sand table for railway according to claim 3, characterized in that: A second elastic member (34) is sleeved on the outside of the movable rod (33), and the second elastic member (34) is arranged between the inner wall of the through slot (17) and the touch block (32).

6. The modular adjustable display sand table for railway according to claim 1, characterized in that: The sand table seat (1) comprises an upper seat body (11) and a lower seat body (12), and the upper seat body (11) is fitted and fixed to the lower seat body (12), the side wall of the upper seat body (11) is evenly provided with through holes (7), the splicing seat (6) is fixedly installed on a side of the lower seat body (12) opposite to the upper seat body (11), and the splicing seat (6) is inserted into the inside of the through hole (7).

7. The modular adjustable display sand table for railway according to claim 6, characterized in that: A groove (9) is provided on one side of the upper seat body (11) opposite to the lower seat body (12), and the through hole (7) is arranged in the groove (9); an outer frame (8) is fixedly installed on one side of the lower seat body (12) opposite to the upper seat body (11), and the splicing seat (6) is arranged in the outer frame (8), and the outer frame (8) corresponds to the groove (9).

8. The modular adjustable display sand table for railway according to claim 1, characterized in that: The lifting mechanism (2) comprises a scissor frame (21), each end of the scissor frame (21) is rotatably provided with a connecting seat (22), a guide seat (23) is fixedly installed on the side wall of the connecting seat (22), the sand table seat (1) and the opposite side wall of the base (3) are fixedly installed with a guide rod (24), the guide seat (23) is sleeved on the outside of the guide rod (24), and an electric telescopic member (25) is provided between the base (3) and the scissor frame (21).

9. The modular adjustable display sand table for railways according to claim 8, characterized in that: The movable end of the electric telescopic member (25) is rotatably arranged on an outer wall of a rod body of the scissors frame (21), and the other end of the electric telescopic member (25) is rotatably arranged on a side wall of the base (3).

10. The modular adjustable display sand table for railway according to claim 1, characterized in that: A support rod (5) is fixedly mounted on one side of the sand table seat (1) opposite to the base (3), and a support tube (4) is fixedly mounted on one side of the base (3) opposite to the sand table seat (1), wherein the support tube (4) is sleeved on the outside of the support rod (5).

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