Road and bridge sand table practical training device

Abstract

The utility model relates to a road and bridge sand table practical training device, which effectively solves the problems that the height of an urban traffic simulation sand table is inconvenient to adjust and dust is easy to accumulate when the urban traffic simulation sand table is used. Comprising a round bottom plate, an up-down axial supporting cylinder is fixed to the upper end of the bottom plate, a rotating cylinder is rotatably connected to the upper end of the supporting cylinder, a rectangular shell with an upward opening is fixed to the upper end of the rotating cylinder, an up-down axial threaded column is slidably connected into the rotating cylinder through a sliding rail, and the lower end of the threaded column is inserted into the supporting cylinder and is in threaded connection with the supporting cylinder; a subway simulation sand table is arranged in the rectangular shell, a road and bridge simulation sand table located above the subway simulation sand table is arranged in the rectangular shell, the threaded column is slidably connected with the rectangular shell and fixedly connected with the lower end of the subway simulation sand table, a moving groove is formed in the threaded column, and a moving column is slidably connected in the moving groove. The upper end of the moving column penetrates through the subway simulation sand table and is fixedly connected with the lower end of the road-bridge simulation sand table; the device is simple in structure, convenient to operate, novel in conception and high in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of sand table training, in particular to a road and bridge sand table training device. Background Art

[0002] In the teaching of urban transportation, roads, bridges, and subway construction engineering in the majors of road and bridge engineering technology, municipal engineering technology, and subway, road sand tables are often used to visually display municipal transportation so that students can understand the construction and composition of urban transportation. The sand table model can visually and specifically display the road and bridge engineering entities. The sand table entities in the urban traffic simulation sand table can visually display the overall picture of huge structures (super-large bridges, road components) and hidden structures (subways, urban integrated transportation hubs), so that students can have an intuitive understanding of the overall situation of the structures. By viewing the sand table entities, it can solve the regret that it is difficult for students to see the complete structure of super-large bridges or subway stations at the construction site due to time and huge project scale factors;

[0003] However, when the existing sand table is in use, the road and bridge simulation sand table and the subway simulation sand table are placed separately. Students need to observe them at different booths, which is not conducive to students' understanding of the overall spatial structure of urban traffic. At the same time, the existing sand table is not easy to block when not on display, which easily causes dust accumulation. In addition, the existing urban traffic simulation sand table is not easy to adjust the height in the up and down directions according to needs, which is not conducive to the use of teaching staff. Utility Model Content

[0004] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the utility model is to provide a road and bridge sand table training device, which effectively solves the problem that the urban traffic simulation sand table is inconvenient to adjust the height during use and easily accumulates dust.

[0005] The technical solution is as follows: the utility model comprises a circular bottom plate, a support cylinder with an upper and lower axial direction is fixed on the upper end of the bottom plate, a rotating cylinder is rotatably connected to the upper end of the supporting cylinder, a rectangular shell with an opening facing upward is fixed to the upper end of the rotating cylinder, a threaded column with an upper and lower axial direction is slidably connected in the rotating cylinder via a slide rail, the lower end of the threaded column is inserted into the supporting cylinder and threadedly connected to the supporting cylinder, a subway simulation sand table is arranged in the rectangular shell, a road and bridge simulation sand table located above the subway simulation sand table is arranged in the rectangular shell, the threaded column is slidably connected to the rectangular shell and fixedly connected to the lower end of the subway simulation sand table, and the threaded column is slidably connected to the rectangular shell and fixedly connected to the lower end of the subway simulation sand table. A moving groove is opened inside, and a moving column is slidably connected in the moving groove. The upper end of the moving column passes through the subway simulation sand table and is fixedly connected to the lower end of the road and bridge simulation sand table. Front and rear axial transmission boxes are respectively fixed at the left and right ends of the rectangular shell. Rotating columns connected to the front and rear axes are rotatably connected in the transmission boxes. A shielding cloth is provided on the rotating column on the left, and the shielding cloth can cover the opening of the rectangular shell. Connecting blocks are respectively provided on the front and rear sides of the right end of the shielding cloth. Pull straps are respectively wrapped on the front and rear sides of the rotating column on the right, and the shielding cloth is located between the two pull straps, and the free ends of the pull straps are connected to the connecting blocks on the corresponding sides.

[0006] The utility model has an ingenious structure and is easy to use. By arranging a rotating cylinder, a threaded column, a supporting cylinder, a rectangular shell, a road and bridge simulation sand table and a subway simulation sand table, it is convenient for teaching personnel to rotate the rectangular shell to move the road and bridge simulation sand table and the subway simulation sand table upward as a whole when in use, so as to adjust the height of the road and bridge simulation sand table and the subway simulation sand table, which is convenient for students to observe. At the same time, a shielding cloth, a rotating column, a coil spring, a connecting block and a pull belt are provided, so that the road and bridge simulation sand table and the subway simulation sand table can be shielded when not in use to prevent dust accumulation and inconvenience in cleaning by users. During operation, the shielding cloth can be automatically retracted by only pulling the baffle. When used for teaching, the road and bridge simulation sand table and the subway simulation sand table can be separated up and down, so that students can observe the structural conditions of urban traffic more intuitively and increase students' overall cognition of urban traffic. The utility model has a simple structure, is easy to operate, has a novel conception and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is an axonometric drawing of the utility model.

[0008] Figure 2 It is a full cutaway front view of the utility model.

[0009] Figure 3 It is a partially cutaway top view of the utility model.

[0010] Figure 4 It is a partially cutaway front view of the utility model.

[0011] Figure 5 It is a partially cutaway top view axonometric drawing of the utility model.

[0012] Figure 6 This utility model Figure 2 A is an enlarged view of the middle image.

[0013] Figure 7 This utility model Figure 2 Enlarged view of B.

[0014] Figure 8 This utility model Figure 4 Enlarged view of C in the middle. DETAILED DESCRIPTION

[0015] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0016] Depend on Figures 1 to 8 The invention provides a circular bottom plate 1, wherein a support cylinder 2 in an up-and-down axial direction is fixed on the upper end of the bottom plate 1, a rotating cylinder 3 is rotatably connected to the upper end of the support cylinder 2, a rectangular shell 4 with an opening facing upward is fixed to the upper end of the rotating cylinder 3, a threaded column 6 in an up-and-down axial direction is slidably connected in the rotating cylinder 3 via a slide rail 5, the lower end of the threaded column 6 is inserted into the support cylinder 2 and is threadedly connected to the support cylinder 2, a subway simulation sand table 7 is arranged in the rectangular shell 4, a road and bridge simulation sand table 8 is arranged above the subway simulation sand table 7 in the rectangular shell 4, the threaded column 6 is slidably connected to the rectangular shell 4 and is fixedly connected to the lower end of the subway simulation sand table 7, a movable groove 9 is arranged in the threaded column 6, and the movable groove 9 is provided in the movable groove 9. A moving column 10 is slidably connected, the upper end of which passes through the subway simulation sand table 7 and is fixedly connected to the lower end of the road and bridge simulation sand table 8. Front and rear axial transmission boxes 11 are respectively fixed at the left and right ends of the rectangular shell 4. The transmission boxes 11 are rotatably connected to rotating columns 12 of the front and rear axes. A shielding cloth 13 is provided on the rotating column 12 on the left side, and the shielding cloth 13 can shield the opening of the rectangular shell 4. Connecting blocks 14 are respectively provided on the front and rear sides of the right end of the shielding cloth 13. Pull straps 15 are respectively wrapped on the front and rear sides of the rotating column 12 on the right side, and the shielding cloth 13 is located between the two pull straps 15. The free end of the pull strap 15 is connected to the connecting block 14 on its corresponding side.

[0017] In order to facilitate the movement of the moving column 10 , the lower end of the moving column 10 is connected to the lower end surface of the moving groove 9 via a compression spring 16 .

[0018] In order to facilitate limiting the sliding of the movable column 10 from the movable groove 9, the left and right ends of the threaded column 6 are respectively provided with a card slot 17 connected to the movable groove 9, and the left and right sides of the movable column 10 are respectively provided with a rectangular groove 18, and the rectangular groove 18 is provided with an elastic buckle 19 that can be inserted into the card slot 17, and the two elastic buckles 19 are distributed in an eight-shaped shape.

[0019] In order to facilitate the removal of the buckle from the slot 17, a pressing groove 20 is opened at the upper end of the movable column 10, and a pressing block 21 is slidably connected to the road and bridge simulation sand table 8. The lower end of the pressing block 21 is inserted into the pressing groove 20 and is provided with two left and right opposite pressing rods 22. The two pressing rods 22 are slidably connected to the movable column 10 and can contact the elastic buckle 19 on the corresponding side.

[0020] In order to facilitate the movement of the pressing block 21 , the lower end of the pressing block 21 is connected to the lower end surface of the pressing groove 20 via a return spring 23 .

[0021] In order to facilitate the resetting of the shielding cloth 13 , coil springs 24 are respectively provided at the front and rear ends of the left rotating column 12 , and the free ends of the coil springs 24 are connected to the transmission box 11 .

[0022] In order to facilitate the limitation of the coil spring 24 to drive the rotating column 12 to rotate, a ratchet 25 is coaxially fixed on the right rotating column 12, and an inverted L-shaped baffle 26 is slidably connected to the right transmission box 11. The stepped surface of the baffle 26 is connected to the transmission box 11 through a spring sheet 27 and one end is inserted into the tooth groove of the ratchet 25.

[0023] In order to facilitate the sliding of the connecting block 14 and the rotation of the right rotating column 12, the front and rear ends of the rectangular shell 4 are respectively provided with clearance grooves 28, and the connecting block 14 is located in the clearance groove 28 on its corresponding side. The front end of the right rotating column 12 passes through the transmission box 11 and is provided with a rotating handle 29.

[0024] When the utility model is in use, in the initial state, the coil spring 24 is in a contracted state, and the compression spring 16 is in a compressed state. If it is necessary to prevent the shielding cloth 13 from blocking the opening of the rectangular shell 4, it is only necessary to pull the baffle plate 26 to the right, and the baffle plate 26 moves and stretches the spring sheet 27, and moves out of the tooth groove of the ratchet 25. At this time, under the action of the coil spring 24, the left rotating column 12 rotates and drives the shielding cloth 13 to be wound around the left rotating column 12. At the same time, the shielding cloth 13 drives the two drawstrings 15 to move to the left through the two connecting blocks 14, and the drawstrings 15 drive the right rotating column 12 to rotate, and when the drawstrings 15 move, they are located in the give way groove 28 on the rectangular shell 4, and will not block the opening of the rectangular shell 4.

[0025] When the coil spring 24 recovers the balance state, the shielding cloth 13 stops blocking the opening of the rectangular shell 4, and then the baffle 26 is released. Under the action of the spring sheet 27, the baffle 26 is reinserted into the tooth groove of the ratchet 25. At this time, the road and bridge simulation sand table 8 leaks out and can be observed. If it is necessary to raise the road and bridge simulation sand table 8 and the subway simulation sand table 7 at the same time, it is only necessary to rotate the rectangular shell as a whole. The rectangular shell drives the rotating drum 3 and the threaded column 6 to rotate relative to the supporting cylinder 2. Since the threaded column 6 is threadedly connected to the supporting cylinder 2, as the threaded column 6 rotates, the threaded column 6 slides upward relative to the rotating drum 3 and the rectangular shell 4, and drives the road and bridge simulation sand table 8 and the subway simulation sand table 7 to move upward as a whole. After the road and bridge simulation sand table 8 and the subway simulation sand table 7 move upward to a suitable height, stop rotating the rectangular shell. At this time, due to the self-locking property of the threaded connection, the threaded column 6 will not reset downward.

[0026] If it is necessary to move the road and bridge simulation sand table 8 upward and separate it from the subway simulation sand table 7, it is only necessary to press the button 21 downward, the button 21 drives the two pressure rods 22 to move downward, and at the same time squeezes the reset spring 23, the two pressure rods 22 move downward and drive the two elastic buckles 19 to swing relative to each other, so that the elastic buckles 19 move out of the slots 17, at this time, under the action of the compression spring 16, the moving column 10 moves upward, and drives the road and bridge simulation sand table 8 to move upward and separate from the subway simulation sand table 7, and then release the button 21. Under the action of the reset spring 23, the button 21 and the pressure rod 22 are reset, and at the same time, the two elastic buckles 19 move to the upper side of the moving slot 9;

[0027] If the road and bridge simulation sand table 8 needs to be reset, it is only necessary to press the road and bridge simulation sand table 8 downward to drive the two elastic buckles 19 to move to the card slot 17, and the two elastic buckles 19 swing in opposite directions and insert into the card slot 17. If the road and bridge simulation sand table 8 and the subway simulation sand table 7 are moved downward as a whole, it is only necessary to rotate the rectangular shell in the opposite direction to make the threaded column 6 rotate in the opposite direction, slide downward and drive the road and bridge simulation sand table 8 and the subway simulation sand table 7 to reset downward;

[0028] If the shielding cloth 13 needs to be reset, it is only necessary to rotate the handle 29 clockwise. The handle 29 drives the rotating column 12 to rotate clockwise. The handle 29 drives the drawstring 15 to be rewound around the rotating column 12, and at the same time drives the shielding cloth 13 to move to the right. The shielding cloth 13 drives the rotating column 12 on the left to rotate and contracts the winding spring 24. Due to the setting of the ratchet 25, the ratchet 25 can be rotated by rotating it clockwise. When the baffle 26 does not move, the ratchet 25 cannot rotate counterclockwise. When the shielding cloth 13 is reset, stop rotating the handle 29.

[0029] The utility model has an ingenious structure and is easy to use. By arranging a rotating cylinder, a threaded column, a supporting cylinder, a rectangular shell, a road and bridge simulation sand table and a subway simulation sand table, it is convenient for teaching personnel to rotate the rectangular shell to move the road and bridge simulation sand table and the subway simulation sand table upward as a whole when in use, so as to adjust the height of the road and bridge simulation sand table and the subway simulation sand table, which is convenient for students to observe. At the same time, a shielding cloth, a rotating column, a coil spring, a connecting block and a pull belt are provided, so that the road and bridge simulation sand table and the subway simulation sand table can be shielded when not in use to prevent dust accumulation and inconvenience in cleaning by users. During operation, the shielding cloth can be automatically retracted by only pulling the baffle. When used for teaching, the road and bridge simulation sand table and the subway simulation sand table can be separated up and down, so that students can observe the structural conditions of urban traffic more intuitively and increase students' overall cognition of urban traffic. The utility model has a simple structure, is easy to operate, has a novel conception and is highly practical.

Claims

1. A road and bridge sand table training device, comprising a circular bottom plate (1), characterized in that: A support cylinder (2) in an up-and-down axial direction is fixed to the upper end of the bottom plate (1), a rotating cylinder (3) is rotatably connected to the upper end of the support cylinder (2), a rectangular shell (4) with an opening facing upward is fixed to the upper end of the rotating cylinder (3), a threaded column (6) in an up-and-down axial direction is slidably connected to the rotating cylinder (3) via a slide rail (5), the lower end of the threaded column (6) is inserted into the support cylinder (2) and is threadedly connected to the support cylinder (2), a subway simulation sand table (7) is arranged in the rectangular shell (4), a road and bridge simulation sand table (8) located above the subway simulation sand table (7) is arranged in the rectangular shell (4), the threaded column (6) is slidably connected to the rectangular shell (4) and is fixedly connected to the lower end of the subway simulation sand table (7), a moving groove (9) is provided in the threaded column (6), and a sliding groove (9) is provided in the moving groove (9) to slide and connect the moving groove (9) to the road and bridge simulation sand table (8) located above the subway simulation sand table (7), the threaded column (6) is slidably connected to the rectangular shell (4) and is fixedly connected to the lower end of the subway simulation sand table (7), and a moving groove (9) is provided in the threaded column (6). A movable column (10) is connected, the upper end of the movable column (10) penetrates the subway simulation sand table (7) and is fixedly connected to the lower end of the road and bridge simulation sand table (8), the left and right ends of the rectangular shell (4) are respectively fixed with transmission boxes (11) of front and rear axial directions, the transmission boxes (11) are respectively rotatably connected with rotating columns (12) of front and rear axial directions, the rotating column (12) on the left side is provided with a shielding cloth (13), the shielding cloth (13) can shield the opening of the rectangular shell (4), the front and rear sides of the right end of the shielding cloth (13) are respectively provided with connecting blocks (14), the front and rear sides of the rotating column (12) on the right side are respectively wrapped with drawstrings (15), the shielding cloth (13) is located between the two drawstrings (15), and the free end of the drawstring (15) is connected to the connecting block (14) on the corresponding side.

2. A road and bridge sand table training device according to claim 1, characterized in that: The lower end of the movable column (10) is connected to the lower end surface of the movable groove (9) via a compression spring (16).

3. A road and bridge sand table training device according to claim 1, characterized in that: The left and right ends of the threaded column (6) are respectively provided with a clamping groove (17) connected to the movable groove (9); the left and right sides of the movable column (10) are respectively provided with a rectangular groove (18); the rectangular groove (18) is provided with an elastic clamping buckle (19) which can be inserted into the clamping groove (17); and the two elastic clamping buckles (19) are distributed in an eight-shaped shape.

4. A road and bridge sand table training device according to claim 1, characterized in that: The upper end of the movable column (10) is provided with a pressing groove (20), and a pressing block (21) is slidably connected to the road and bridge simulation sand table (8). The lower end of the pressing block (21) is inserted into the pressing groove (20) and is provided with two pressing rods (22) opposite to each other on the left and right. The two pressing rods (22) are slidably connected to the movable column (10) and can contact the elastic buckles (19) on the corresponding sides thereof.

5. A road and bridge sand table training device according to claim 4, characterized in that: The lower end of the pressing block (21) is connected to the lower end surface of the pressing groove (20) via a return spring (23).

6. A road and bridge sand table training device according to claim 1, characterized in that: The left rotating column (12) is provided with coil springs (24) at the front and rear ends respectively, and the free end of the coil spring (24) is connected to the transmission box (11).

7. The road and bridge sand table training device according to claim 1, characterized in that: A ratchet (25) is coaxially fixed on the right rotating column (12), and an inverted L-shaped baffle (26) is slidably connected to the right transmission box (11). The step surface of the baffle (26) is connected to the transmission box (11) via a spring sheet (27) and the other end is inserted into the tooth groove of the ratchet (25).

8. The road and bridge sand table training device according to claim 1, characterized in that: The rectangular shell (4) is provided with clearance grooves (28) at the front and rear ends respectively, the connecting block (14) is located in the clearance grooves (28) at the corresponding side, and the front end of the right rotating column (12) penetrates the transmission box (11) and is provided with a rotating handle (29).

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