Safety type fabricated floor manufacturing mold

Abstract

The utility model relates to the technical field of floor slabs, and discloses a safety type assembly type floor slab manufacturing mold which comprises a table plate, table legs, a limiting plate and a hollow block are fixedly connected to the bottom of the table plate, a second motor is fixedly connected to one side of the limiting plate, when air needs to be exhausted, the second motor is controlled to operate, the second motor drives a rotating rod to rotate, and the hollow block is fixedly connected with the table legs. The rotating rods drive the protruding round blocks and the limiting wheels to rotate, the limiting wheels drive the belt to drive the belt, the belt drives the other limiting wheel to rotate, the other limiting wheel drives the other rotating rod to rotate, the ejector rod moves downwards through the gravity of the ejector rod, under the action of the damping rod and the spring, the ejector rod cannot move downwards excessively, and at the moment, the protruding round blocks rotate to drive the rubber plate to move; the rubber plate drives the ejector rod to move in the hollow block until the ejector rod strikes the table plate, and the spring pushes the rubber plate to move downwards under the action of the damping rod and the spring, so that reciprocating motion is performed, and the effect of discharging gas in raw materials is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of floor slabs, in particular to a safety-type assembled floor slab manufacturing mold. Background Technique

[0002] A floor slab is a building structure used to separate different floors in the vertical direction of a building and bear vertical loads. There are various materials and forms of floor slabs, such as wooden floor slabs, brick arch floor slabs, reinforced concrete floor slabs, and floor slabs with steel liner plates for bearing loads. When manufacturing floor slabs, corresponding molds are required for production, and attention should be paid to safety issues during the production process to reduce harm to the human body.

[0003] A safety-type mold for manufacturing assembled floor slabs, with an application number of (202023287942.2) according to the Chinese patent application, includes a bottom plate and a mold body. The mold body is arranged at the top end of the bottom plate, and handles are arranged on both sides of the mold body. Installation structures are arranged at the bottom ends of both sides of the mold body. The installation structure includes a clamping block, a clamping groove, a movable groove, a spring, a limiting block, and a limiting groove. The clamping block is arranged at the bottom ends of both sides of the mold body. In the utility model, a scraping structure is arranged at the top end of the mold body. When raw materials are poured into the interior of the mold body, since the surface of the raw materials is uneven, at this time, the staff needs to hold the handle and apply force to one side. Then, the handle drives the scraping block to move to one side through the sliding sleeve, thereby scraping the surface of the raw materials flat, so that the staff no longer squats on the mold body and uses a scraper by hand to scrape flat, improving the safety of the staff and thus enhancing the practicability.

[0004] In this utility model, installation structures are arranged at the bottom ends of both sides of the mold body. When the mold body needs to be installed, the staff only needs to insert the clamping block into the interior of the clamping groove. Then, during the downward movement, the limiting block will be squeezed and contract inward. When it moves to the limiting groove, the limiting block will be engaged with the limiting groove under the action of the spring, improving the work efficiency. However, during the production process, the raw materials cannot be vibrated in the mold, and the internal air cannot be discharged. When leveling the raw materials, manual scraping is required, reducing the work efficiency. Automatic scraping treatment cannot be performed, and products of different lengths cannot be produced. Content of the Utility Model

[0005] The purpose of the utility model is to solve the shortcomings existing in the prior art, and a safety-type assembled floor slab manufacturing mold is proposed, which solves the problems put forward in the above background technique that during the production process, the raw materials cannot be vibrated in the mold, the internal air cannot be discharged, manual scraping is required when leveling the raw materials, reducing the work efficiency, automatic scraping treatment cannot be performed, and products of different lengths cannot be produced.

[0006] To achieve the above object, the present utility model provides the following technical solutions: A safe prefabricated floor manufacturing mold, including a tabletop, the bottom of the tabletop is fixedly connected with table legs, a limiting plate and a hollow block, one side of the limiting plate is fixedly connected with a second motor, the inside of the limiting plate is rotatably connected with a rotating rod, the outer surface of the rotating rod is fixedly connected with a protruding round block, the inside of the hollow block is slidably connected with a top rod, the outer surface of the hollow block is fixedly connected with a limiting side block, one side of the other limiting side block is fixedly connected with a damping rod and a spring, the bottom of the top rod is fixedly connected with a rubber plate, the outer surface of the rotating rod is fixedly connected with a limiting wheel, and the outer surface of the limiting wheel is drivingly connected with a belt.

[0007] By adopting the above technical solutions, when it is necessary to discharge air, control the operation of the second motor. The second motor drives the rotating rod to rotate. The rotating rod drives the protruding round block and the limiting wheel to rotate. The limiting wheel drives the belt to drive. The belt drives another limiting wheel to rotate. Another limiting wheel drives another rotating rod to rotate. Due to the gravity of the top rod, the top rod moves downward. Under the action of the damping rod and the spring, the top rod will not move downward excessively. At this time, the protruding round block rotates to drive the rubber plate to move. The rubber plate drives the top rod to move inside the hollow block until the top rod strikes the tabletop. Under the action of the damping rod and the spring, the spring pushes the rubber plate downward, thereby performing a reciprocating motion, which has the function of discharging the gas in the raw material.

[0008] Furthermore, the top of the tabletop is fixedly connected with a U-shaped plate and a hole side plate. One side of the hole side plate is fixedly connected with a fixed block. One side of the fixed block is fixedly connected with a first motor. The inside of the fixed block is rotatably connected with a positive and negative screw rod. The outer surface of the positive and negative screw rod is threadedly connected with a moving block. A moving rod is arranged on the opposite sides of the two hole side plates. One side of the moving rod is fixedly connected with a bearing. One side of the moving rod is fixedly connected with a telescopic rod. One side of the telescopic rod is fixedly connected with a flattening plate.

[0009] By adopting the above technical solutions, when it is necessary to level, control the operation of the first motor. With the assistance of the fixed block, the first motor drives the positive and negative screw rod to rotate. The positive and negative screw rod drives the moving block to move. The moving block drives the bearing to roll inside the hole side plate. The bearing drives the moving rod to move. The moving rod drives the telescopic rod to move. The telescopic rod drives the flattening plate to move. When the moving block reaches the other end of the positive and negative screw rod, there is no need to control the reversal of the first motor. When the positive and negative screw rod rotates again, the positive and negative screw rod will move back and level the top of the raw material in the U-shaped plate again, making the top of the floor flat, which has the function of automatic leveling.

[0010] Further, a fixing plate and a limiting block are fixedly connected to the top of the table board. A rotating shaft is rotatably connected inside the fixing plate. A rotating handle is fixedly connected to one side of the rotating shaft. A bidirectional lead screw is rotatably connected to one side of the limiting block. A bevel gear is fixedly connected to the outer surface of the bidirectional lead screw. A pushing block is threadedly connected to the outer surface of the bidirectional lead screw. A moving plate is slidably connected to the inner surface of the U-shaped plate. A connecting rod is rotatably connected to one side of the moving plate.

[0011] By adopting the above technical solution, when different lengths of floor slabs need to be manufactured, manually rotate the rotating handle. The rotating handle drives the rotating shaft to rotate. The rotating shaft drives another bevel gear to rotate. Another bevel gear drives a bevel gear to rotate. A bevel gear drives the bidirectional lead screw to rotate. The bidirectional lead screw drives the pushing block to move. The pushing block drives the connecting rod to move. The connecting rod drives the moving plate to move, so that different lengths of floor slabs can be manufactured, which has the function of manufacturing floor slabs of different lengths.

[0012] Further, the rotating rod is fixedly connected to the output shaft of the second motor. The other ends of the damping rod and the spring are both fixedly connected to the rubber plate. The protruding circular block is located at the bottom of the rubber plate. The number of the limiting wheels is two. Both of the two limiting wheels are connected by a belt drive. The other limiting wheel is fixedly connected to another rotating rod. The ejector rod is located at the bottom of the table board.

[0013] By adopting the above technical solution, the second motor drives the rotating rod to rotate. The rotating rod drives the protruding circular block and the limiting wheel to rotate. The limiting wheel drives the belt drive. The belt drives the other limiting wheel to rotate. The other limiting wheel drives another rotating rod to rotate, which has the function of transmission.

[0014] Further, the other end of the positive and negative lead screw is rotatably connected to another fixing block. The bearing is fixedly connected to the moving block. The bearing is rollingly connected inside the side plate of the hole. The pressing plate is located on the top of the U-shaped plate. The pressing plate is adapted to the U-shaped plate.

[0015] By adopting the above technical solution, with the assistance of the fixing block, the first motor drives the positive and negative lead screw to rotate. The positive and negative lead screw drives the moving block to move. The moving block drives the bearing to roll inside the side plate of the hole. The bearing drives the moving rod to move, which has the function of restricting rotation.

[0016] Further, the number of the bevel gears is two. The two bevel gears are meshed and connected. Another bevel gear is fixedly connected to the rotating shaft. The moving plate is rotatably connected to the pushing block. The moving plate is slidably connected to the top of the table board.

[0017] By adopting the above technical solution, the rotating handle drives the rotating shaft to rotate. The rotating shaft drives another bevel gear to rotate. Another bevel gear drives a bevel gear to rotate. A bevel gear drives the bidirectional lead screw to rotate, which has the function of controlling the length.

[0018] The utility model provides a safe prefabricated floor manufacturing mold, which has the following beneficial effects:

[0019] 1. For this safe prefabricated floor manufacturing mold, when air needs to be discharged, the operation of the second motor is controlled. The second motor drives the rotating rod to rotate, the rotating rod drives the protruding round block and the limiting wheel to rotate, the limiting wheel drives the belt to drive, the belt drives another limiting wheel to rotate, and another limiting wheel drives another rotating rod to rotate. Due to the gravity of the ejector rod, the ejector rod moves downward. Under the action of the damping rod and the spring, the ejector rod will not move downward excessively. At this time, the protruding round block rotates to drive the rubber plate to move, and the rubber plate drives the ejector rod to move inside the hollow block until the ejector rod hits the table board. Under the action of the damping rod and the spring, the spring pushes the rubber plate downward, so as to perform a reciprocating motion, which has the function of discharging the gas in the raw material.

[0020] 2. For this safe prefabricated floor manufacturing mold, when leveling is required, the operation of the first motor is controlled. With the assistance of the fixed block, the first motor drives the positive and negative lead screw to rotate, the positive and negative lead screw drives the moving block to move, the moving block drives the bearing to roll inside the hole side plate, the bearing drives the moving rod to move, the moving rod drives the telescopic rod to move, and the telescopic rod drives the pressing flat plate to move. When the moving block reaches the other end of the positive and negative lead screw, there is no need to control the reversal of the first motor. When the positive and negative lead screw rotates again, the positive and negative lead screw will move back and level the top of the raw material in the U-shaped plate again, making the top of the floor flat, which has the function of automatic leveling. Description of the Drawings

[0021] Figure 1 is a schematic diagram of a safe prefabricated floor manufacturing mold proposed by the utility model;

[0022] Figure 2 is a partial structural diagram of a safe prefabricated floor manufacturing mold proposed by the utility model;

[0023] Figure 3 is a partial cross-sectional view of a safe prefabricated floor manufacturing mold proposed by the utility model;

[0024] Figure 4 is a partial structural diagram of a safe prefabricated floor manufacturing mold proposed by the utility model;

[0025] Figure 5 is an enlarged view of part A of a safe prefabricated floor manufacturing mold proposed by the utility model.

[0026] Legend Explanation:

[0027] 1. Table top; 2. Limit block; 3. Moving plate; 4. U-shaped plate; 5. Moving rod; 6. Fixed block; 7. Motor 1; 8. Forward and reverse screw rods; 9. Moving block; 10. Hole side plate; 11. Table leg; 12. Pressing plate; 13. Bearing; 14. Telescopic rod; 15. Bidirectional screw rod; 16. Connecting rod; 17. Push block; 18. Rotating shaft; 19. Fixed plate; 20. Turning handle; 21. Bevel gear; 22. Hollow block; 23. Rotating rod; 24. Motor 2; 25. Limit plate; 26. Limit side block; 27. Rubber plate; 28. Protruding round block; 29. ​​Push rod; 30. Damping rod; 31. Spring; 32. Limit wheel; 33. Belt. DETAILED DESCRIPTION

[0028] 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.

[0029] Reference Figures 1-5, an embodiment provided by the utility model: a safety-type prefabricated floor manufacturing mold, including a table board 1. The bottom of the table board 1 is fixedly connected with table legs 11, a limiting plate 25 and a hollow block 22. One side of the limiting plate 25 is fixedly connected with a second motor 24. The inside of the limiting plate 25 is rotatably connected with a rotating rod 23. The outer surface of the rotating rod 23 is fixedly connected with a protruding round block 28. The inside of the hollow block 22 is slidably connected with a top rod 29. The outer surface of the hollow block 22 is fixedly connected with a limiting side block 26. One side of another limiting side block 26 is fixedly connected with a damping rod 30 and a spring 31. The bottom of the top rod 29 is fixedly connected with a rubber plate 27. The outer surface of the rotating rod 23 is fixedly connected with a limiting wheel 32. The outer surface of the limiting wheel 32 is drivingly connected with a belt 33. When it is necessary to discharge air, control the operation of the second motor 24. The second motor 24 drives the rotating rod 23 to rotate. The rotating rod 23 drives the protruding round block 28 and the limiting wheel 32 to rotate. The limiting wheel 32 drives the belt 33 to transmit power. The belt 33 drives another limiting wheel 32 to rotate. Another limiting wheel 32 drives another rotating rod 23 to rotate. Due to the gravity of the top rod 29, the top rod 29 moves downward. Under the action of the damping rod 30 and the spring 31, the top rod 29 will not move downward excessively. At this time, the protruding round block 28 rotates to drive the rubber plate 27 to move. The rubber plate 27 drives the top rod 29 to move inside the hollow block 22 until the top rod 29 strikes the table board 1. Under the action of the damping rod 30 and the spring 31, the spring 31 pushes the rubber plate 27 downward, so as to perform a reciprocating motion, which has the function of discharging the gas in the raw material. The rotating rod 23 is fixedly connected with the output shaft of the second motor 24. The other ends of the damping rod 30 and the spring 31 are both fixedly connected with the rubber plate 27. The protruding round block 28 is located at the bottom of the rubber plate 27. The number of limiting wheels 32 is two. The two limiting wheels 32 are both drivingly connected by the belt 33. Another limiting wheel 32 is fixedly connected with another rotating rod 23. The top rod 29 is located at the bottom of the table board 1. The second motor 24 drives the rotating rod 23 to rotate. The rotating rod 23 drives the protruding round block 28 and the limiting wheel 32 to rotate. The limiting wheel 32 drives the belt 33 to transmit power. The belt 33 drives another limiting wheel 32 to rotate. Another limiting wheel 32 drives another rotating rod 23 to rotate, which has the function of transmission.

[0030] Refer to Figures 1-5, an embodiment provided by the present utility model: A U-shaped plate 4 and a hole side plate 10 are fixedly connected to the top of the table board 1. A fixed block 6 is fixedly connected to one side of the hole side plate 10. A first motor 7 is fixedly connected to one side of the fixed block 6. A positive and negative lead screw 8 is rotatably connected inside the fixed block 6. A moving block 9 is threadedly connected to the outer surface of the positive and negative lead screw 8. A moving rod 5 is arranged on the opposite sides of the two hole side plates 10. A bearing 13 is fixedly connected to one side of the moving rod 5. A telescopic rod 14 is fixedly connected to one side of the moving rod 5. A pressing plate 12 is fixedly connected to one side of the telescopic rod 14. When leveling is required, control the operation of the first motor 7. With the assistance of the fixed block 6, the first motor 7 drives the positive and negative lead screw 8 to rotate. The positive and negative lead screw 8 drives the moving block 9 to move. The moving block 9 drives the bearing 13 to roll inside the hole side plate 10. The bearing 13 drives the moving rod 5 to move. The moving rod 5 drives the telescopic rod 14 to move. The telescopic rod 14 drives the pressing plate 12 to move. When the moving block 9 reaches the other end of the positive and negative lead screw 8, there is no need to control the reversal of the first motor 7. When the positive and negative lead screw 8 rotates again, the positive and negative lead screw 8 will move back and level the top of the raw material in the U-shaped plate 4 again, making the top of the floor slab flat, having the function of automatic leveling. A fixing plate 19 and a limiting block 2 are fixedly connected to the top of the table board 1. A rotating shaft 18 is rotatably connected inside the fixing plate 19. A turning handle 20 is fixedly connected to one side of the rotating shaft 18. A bidirectional lead screw 15 is rotatably connected to one side of the limiting block 2. A bevel gear 21 is fixedly connected to the outer surface of the bidirectional lead screw 15. A pushing block 17 is threadedly connected to the outer surface of the bidirectional lead screw 15. A moving plate 3 is slidably connected to the inner surface of the U-shaped plate 4. A connecting rod 16 is rotatably connected to one side of the moving plate 3. When manufacturing floor slabs of different lengths is required, manually rotate the turning handle 20. The turning handle 20 drives the rotating shaft 18 to rotate. The rotating shaft 18 drives another bevel gear 21 to rotate. Another bevel gear 21 drives one bevel gear 21 to rotate. One bevel gear 21 drives the bidirectional lead screw 15 to rotate. The bidirectional lead screw 15 drives the pushing block 17 to move. The pushing block 17 drives the connecting rod 16 to move. The connecting rod 16 drives the moving plate 3 to move, and floor slabs of different lengths can be manufactured, having the function of manufacturing floor slabs of different lengths. The other end of the positive and negative lead screw 8 is rotatably connected to another fixed block 6. The bearing 13 is fixedly connected to the moving block 9. The bearing 13 is rollingly connected inside the hole side plate 10. The pressing plate 12 is located on the top of the U-shaped plate 4. The pressing plate 12 is adapted to the U-shaped plate 4. With the assistance of the fixed block 6, the first motor 7 drives the positive and negative lead screw 8 to rotate. The positive and negative lead screw 8 drives the moving block 9 to move. The moving block 9 drives the bearing 13 to roll inside the hole side plate 10. The bearing 13 drives the moving rod 5 to move, having the function of restricting rotation.There are two bevel gears 21. The two bevel gears 21 are meshed and connected. Another bevel gear 21 is fixedly connected to the rotating shaft 18. The moving plate 3 is rotatably connected to the push block 17. The moving plate 3 is slidably connected to the top of the table board 1. The rotating handle 20 drives the rotating shaft 18 to rotate. The rotating shaft 18 drives another bevel gear 21 to rotate. Another bevel gear 21 drives one bevel gear 21 to rotate. One bevel gear 21 drives the bidirectional lead screw 15 to rotate, which has the function of controlling the length.

[0031] Working principle: When air needs to be discharged, control the operation of the second motor 24. The second motor 24 drives the rotating rod 23 to rotate. The rotating rod 23 drives the protruding round block 28 and the limiting wheel 32 to rotate. The limiting wheel 32 drives the belt 33 to transmit power. The belt 33 drives another limiting wheel 32 to rotate. Another limiting wheel 32 drives another rotating rod 23 to rotate. Due to the gravity of the ejector rod 29, the ejector rod 29 moves downward. Under the action of the damping rod 30 and the spring 31, the ejector rod 29 will not move downward excessively. At this time, the protruding round block 28 rotates to drive the rubber plate 27 to move. The rubber plate 27 drives the ejector rod 29 to move inside the hollow block 22 until the ejector rod 29 hits the table board 1. Under the action of the damping rod 30 and the spring 31, the spring 31 pushes the rubber plate 27 downward, thus performing a reciprocating motion. When leveling is required, control the operation of the first motor 7. With the assistance of the fixed block 6, the first motor 7 drives the forward and reverse lead screw 8 to rotate. The forward and reverse lead screw 8 drives the moving block 9 to move. The moving block 9 drives the bearing 13 to roll inside the hole side plate 10. The bearing 13 drives the moving rod 5 to move. The moving rod 5 drives the telescopic rod 14 to move. The telescopic rod 14 drives the flattening plate 12 to move. When the moving block 9 reaches the other end of the forward and reverse lead screw 8, there is no need to control the reversal of the first motor 7. When the forward and reverse lead screw 8 rotates again, the forward and reverse lead screw 8 will move back and level the top of the raw material in the U-shaped plate 4 again, making the top of the floor slab flat. When floor slabs of different lengths need to be manufactured, manually rotate the rotating handle 20. The rotating handle 20 drives the rotating shaft 18 to rotate. The rotating shaft 18 drives another bevel gear 21 to rotate. Another bevel gear 21 drives one bevel gear 21 to rotate. One bevel gear 21 drives the bidirectional lead screw 15 to rotate. The bidirectional lead screw 15 drives the push block 17 to move. The push block 17 drives the connecting rod 16 to move. The connecting rod 16 drives the moving plate 3 to move, and floor slabs of different lengths can be manufactured.

[0032] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A safe prefabricated floor manufacturing mold, comprising a table top (1), characterized in that: The bottom of the table top (1) is fixedly connected to a table leg (11), a limit plate (25) and a hollow block (22); one side of the limit plate (25) is fixedly connected to a motor 2 (24); the inside of the limit plate (25) is rotatably connected to a rotating rod (23); the outer surface of the rotating rod (23) is fixedly connected to a protruding round block (28); the inside of the hollow block (22) is slidably connected to a top rod (29); the outer surface of the hollow block (22) is fixedly connected to a limit side block (26); one side of the other limit side block (26) is fixedly connected to a damping rod (30) and a spring (31); the bottom of the top rod (29) is fixedly connected to a rubber plate (27); the outer surface of the rotating rod (23) is fixedly connected to a limit wheel (32); the outer surface of the limit wheel (32) is transmission-connected to a belt (33).

2. A safe assembled floor slab manufacturing mold according to claim 1, characterized in that: The top of the table top (1) is fixedly connected to a U-shaped plate (4) and a hole side plate (10); one side of the hole side plate (10) is fixedly connected to a fixed block (6); one side of the fixed block (6) is fixedly connected to a motor (7); the interior of the fixed block (6) is rotatably connected to a forward and reverse screw rod (8); the outer surface of the forward and reverse screw rod (8) is threadedly connected to a moving block (9); a moving rod (5) is provided on the opposite side of the two hole side plates (10); one side of the moving rod (5) is fixedly connected to a bearing (13); one side of the moving rod (5) is fixedly connected to a telescopic rod (14); one side of the telescopic rod (14) is fixedly connected to a pressing plate (12).

3. A safe assembled floor slab manufacturing mold according to claim 2, characterized in that: The top of the table top (1) is fixedly connected to a fixed plate (19) and a limit block (2); the fixed plate (19) is internally rotatably connected to a rotating shaft (18); one side of the rotating shaft (18) is fixedly connected to a turning handle (20); one side of the limit block (2) is rotatably connected to a bidirectional screw rod (15); the outer surface of the bidirectional screw rod (15) is fixedly connected to a bevel gear (21); the outer surface of the bidirectional screw rod (15) is threadedly connected to a push block (17); the inner surface of the U-shaped plate (4) is slidably connected to a movable plate (3); one side of the movable plate (3) is rotatably connected to a connecting rod (16).

4. The safe assembled floor slab manufacturing mold according to claim 1, characterized in that: The rotating rod (23) is fixedly connected to the output shaft of the second motor (24); the other ends of the damping rod (30) and the spring (31) are fixedly connected to the rubber plate (27); the protruding round block (28) is located at the bottom of the rubber plate (27); there are two limiting wheels (32); the two limiting wheels (32) are connected by belts (33); the other limiting wheel (32) is fixedly connected to the other rotating rod (23); and the top rod (29) is located at the bottom of the table top (1).

5. The safe assembled floor slab manufacturing mold according to claim 2, characterized in that: The other end of the forward and reverse screw rod (8) is rotatably connected to another fixed block (6), the bearing (13) is fixedly connected to the movable block (9), the bearing (13) is rollingly connected to the inside of the hole side plate (10), the pressing plate (12) is located on the top of the U-shaped plate (4), and the pressing plate (12) is adapted to the U-shaped plate (4).

6. The safe assembled floor slab manufacturing mold according to claim 3 is characterized by: There are two bevel gears (21), the two bevel gears (21) are meshed and connected, the other bevel gear (21) is fixedly connected to the rotating shaft (18), the movable plate (3) is rotationally connected to the push block (17), and the movable plate (3) is slidably connected to the top of the table top (1).

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