CN221912555U - Prefabricated beam bottom base - Google Patents

Abstract

The utility model discloses a precast beam bottom base, which relates to the technical field of precast beam production and comprises a base main body, a fixed plate, a first lug and a lifting groove, wherein the utility model adopts the limiting component, a second lug is clamped in a second clamping groove to limit the position of the base main body, a rotating plate is rotated to drive the second lug to be far away from the second clamping groove to detach or mount the base main body along the vertical direction, thereby reducing the difficulty of detaching and mounting the base main body, through setting up first baffle and drive assembly, first baffle can cover the one side of lift groove intercommunication to outside air to avoid dust and impurity in the outside air to get into inside the lift groove, drive assembly can drive first baffle and cover the lift groove when rotating the rotating plate and making spacing subassembly accomplish spacing to the base main part, and drive first baffle upwards to rotate through reverse rotation rotating plate during dismantling or installing the base main part, avoid first baffle to hinder the decline of connecting plate.

Description

Prefabricated beam bottom base

Technical Field

The utility model relates to the technical field of prefabricated beam production, in particular to a prefabricated beam bottom base.

Background Art

Precast beams are prefabricated in factories and then transported to the construction site for installation and fixation in the position required by the design. The production process of precast beams includes prefabricating concrete composite flexural members in the precast factory, and then pouring concrete for the second time at the construction site to connect the precast beams and the superstructure to form an overall assembled structure. The precast factory provides a supporting base for the production of precast beams. When the precast factory is moved after the project is completed, the base needs to be dismantled to avoid waste of raw materials and reduce the construction time of the precast factory.

For example, a base structure for prefabricated beam production disclosed in the utility model with authorization announcement number CN217378614U has protrusions on both sides of the base body. The protrusions pass through the slots and slide into the positioning slots, and stop columns are vertically slid in the slots to cooperate with the protrusions. The protrusions are blocked in the positioning slots, which can fix the position of the protrusions and facilitate the installation and disassembly of the base body.

This prior art also has the following problems when used:

The device moves the base body between two fixed plates by hoisting. Since the bottom surface of the base body is in contact with the ground and the base body is long and heavy, it consumes a lot of energy to make the protrusion slide laterally into the positioning groove by moving the base body laterally, and the operation is difficult. After the device completes the installation of the base body, the lifting groove under the blocking column is connected to the outside air, and dust and impurities in the outside air can easily enter and accumulate inside the lifting groove, thereby affecting the disassembly of the base body.

Utility Model Content

In order to overcome the deficiencies of the prior art, the utility model provides a prefabricated beam bottom base to solve the technical problems mentioned in the above background.

In order to solve the above technical problems, the utility model provides the following technical solutions: a prefabricated beam bottom base, comprising a base body, a fixing plate, a first convex block and a lifting groove, wherein the base body is fixedly provided with symmetrical first convex blocks on the front and rear sides, the base body is provided with symmetrical fixing plates on the front and rear sides, and the outer side of the L-shaped vertical part of the fixing plate is provided with a lifting groove;

A limiting component, which is disposed between the fixing plate and the first protrusion, and can improve the convenience of the fixing plate limiting the first protrusion;

A first baffle, which is arranged outside the lifting slot and can cover a side of the lifting slot connected to the outside air;

A driving assembly is arranged at the front and rear sides of the base body. The driving assembly can drive the first baffle to cover the lifting slot when the base body is installed.

As a preferred technical solution of the present utility model, the top surface of the L-shaped vertical part of the fixed plate is provided with a first groove adapted to the first protrusion, and the first protrusion is slidably connected to the fixed plate through the first groove, and a symmetrical guide rod is fixedly provided on the top surface of the L-shaped horizontal part of the fixed plate, and a connecting plate is penetrated through the outer side of the guide rod, and the guide rod and the connecting plate are slidably connected, and the connecting plate is slidably connected to the vertical part of the L-shaped fixed plate, and a threaded rod is fixedly provided on the top surface of the L-shaped horizontal part of the fixed plate, and a threaded sleeve is threadedly connected to the outer side of the threaded rod, and the outer side of the threaded sleeve is rotatably connected to the connecting plate along the vertical direction through a bearing, and a rotating plate is fixedly provided on the top surface of the threaded sleeve.

As a preferred technical solution of the utility model, the limiting assembly includes an L-shaped plate, a second protrusion, an inclined plate, a slide plate, a T-shaped slider, a T-shaped slide groove, a spring and a second baffle plate, the L-shaped plate is fixedly arranged on the top surface of the connecting plate, the inclined plate is connected to the top of the L-shaped plate by sliding, the slide plate and the second protrusion are respectively fixedly arranged on the left and right sides of the inclined plate, the spring is fixedly arranged on the side of the slide plate away from the inclined plate, the T-shaped slider is fixedly arranged on the top surface of the slide plate, the T-shaped slide groove is arranged inside the vertical part of the L-shape of the fixed plate, and the second baffle plate is fixedly arranged on the bottom surface of the L-shaped plate.

As a preferred technical solution of the present utility model, a transverse groove is provided inside the L-shaped vertical part of the fixed plate, a second groove adapted to the second groove is provided inside the first protrusion, the second protrusion is slidably connected to the first protrusion via the second groove, the top surface of the slide plate is slidably connected to the inner wall of the transverse groove, the T-shaped slide groove is connected to the transverse groove, the T-shaped slider is adapted to the T-shaped slide groove, the T-shaped slider is slidably connected to the fixed plate via the T-shaped slide groove, the end of the spring away from the slide plate is fixedly connected to the inner wall of the transverse groove, and the L-shaped plate is slidably connected to the L-shaped vertical part of the fixed plate via the inner wall of the lifting groove.

As a preferred technical solution of the utility model, the driving assembly includes a first rotating rod, a first bevel gear, a second bevel gear, a second rotating rod, a third bevel gear, a fourth bevel gear and a limit plate. The first rotating rod is arranged through the inside of the first baffle, the fourth bevel gear is fixedly arranged on the outside of the first rotating rod, the third bevel gear is connected to the outside of the fourth bevel gear by meshing, the second rotating rod is fixedly arranged on the front face of the third bevel gear, the second bevel gear is fixedly arranged on the front face of the second rotating rod, the first bevel gear is fixedly arranged on the outside of the threaded sleeve, and the limit plate is connected to the outside of the second rotating rod by rotation.

As a preferred technical solution of the utility model, the first baffle is fixedly connected to the first rotating rod, the left and right sides of the first rotating rod are respectively connected with fixing plates by rotation, the top surface of the fixing plate is fixedly connected to the bottom surface of the connecting plate, the first bevel gear is meshingly connected to the second bevel gear, and the top surface of the limit plate is fixedly connected to the bottom surface of the connecting plate.

Compared with the prior art, the utility model can achieve the following beneficial effects:

The utility model provides a limit assembly, and the second protrusion is engaged in the second slot to limit the position of the base body. The base body can be disassembled or installed in the vertical direction by rotating the rotating plate to drive the second protrusion away from the second slot, thereby reducing the difficulty of disassembling and installing the base body. By providing a first baffle and a driving assembly, the first baffle can cover the side of the lifting slot that is connected to the external air, thereby preventing dust and impurities in the external air from entering the lifting slot. The driving assembly can drive the first baffle to cover the lifting slot when the rotating plate is rotated to allow the limit assembly to complete the limiting of the base body, and during the disassembly or installation of the base body, the rotating plate is rotated in the opposite direction to drive the first baffle to rotate upward, thereby preventing the first baffle from obstructing the descent of the connecting plate.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a schematic diagram of the main structure of the utility model;

Figure 2 is a schematic diagram of the front view structure of the utility model;

FIG3 is a schematic diagram of the cross-sectional structure of the front view of the limit assembly of the utility model;

FIG4 is a schematic diagram of the cross-sectional structure of the left side view of the limit assembly of the utility model;

FIG5 is a schematic diagram of the cross-sectional structure of the left side view of the drive assembly of the utility model;

Wherein: 1. base body; 2. fixing plate; 3. first protrusion; 4. connecting plate; 5. threaded sleeve; 6. rotating plate; 7. threaded rod; 8. L-shaped plate; 9. first baffle; 10. guide rod; 11. second protrusion; 12. first rotating rod; 13. first bevel gear; 14. second bevel gear; 15. second rotating rod; 16. third bevel gear; 17. fourth bevel gear; 18. limit plate; 19. inclined plate; 20. sliding plate; 21. T-shaped slider; 22. T-shaped slide groove; 23. spring; 24. second baffle; 25. lifting groove.

DETAILED DESCRIPTION

In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

Example

Please refer to Figures 1 to 5. The utility model provides a prefabricated beam bottom base, including a base body 1, a fixing plate 2, a first protrusion 3 and a lifting groove 25. The base body 1 is generally made of steel, which has a large pressure-bearing capacity and can provide effective support during the production of prefabricated beams. A plurality of symmetrical first protrusions 3 are fixedly arranged on the front and rear sides of the base body 1, and symmetrical fixing plates 2 are arranged on the front and rear sides of the base body 1. The top surface of the L-shaped vertical part of the fixing plate 2 is provided with a first card groove adapted to the first protrusion 3. The first protrusion 3 is slidably connected to the fixing plate 2 through the first card groove. A lifting groove 25 is arranged on the outer side of the L-shaped vertical part of the fixing plate 2. A first baffle 9 is arranged on the outer side of the lifting groove 25. The first baffle 9 can cover the side of the lifting groove 25 connected to the external air, thereby preventing dust and impurities in the external air from entering the lifting groove 25. The top surface of the L-shaped horizontal part of the fixing plate 2 is provided with a plurality of anchor holes that penetrate to the bottom surface. The fixing plate 2 can be fixed to the ground by passing the anchor bolts through the anchor holes.

As shown in Figures 1 to 5, a threaded rod 7 and a symmetrical guide rod 10 are fixedly arranged on the top surface of the L-shaped transverse part of the fixed plate 2. A threaded sleeve 5 is connected to the outer side of the threaded rod 7 through a thread. The outer side of the threaded sleeve 5 is vertically rotatably connected to the connecting plate 4 through a bearing. A rotating plate 6 is fixedly arranged on the top surface of the threaded sleeve 5. The outer side of the guide rod 10 penetrates the connecting plate 4 and is connected to the connecting plate 4 by sliding. The connecting plate 4 is connected to the vertical part of the fixed plate 2L by sliding. Rotating the rotating plate 6 drives the threaded sleeve 5 to rotate. The threaded sleeve 5 can rotate to move upward or downward along the connecting plate 4. The movement of the threaded sleeve 5 can drive the connecting plate 4 to move upward or downward through the bearing. The guide rod 10 can guide the movement of the connecting plate 4.

As shown in Figures 1 to 4, a limiting assembly is arranged between the fixed plate 2 and the first protrusion 3, and the limiting assembly is composed of an L-shaped plate 8, a second protrusion 11, an inclined plate 19, a slide plate 20, a T-shaped slider 21, a T-shaped slide groove 22, a spring 23 and a second baffle 24. A plurality of L-shaped plates 8 are fixedly arranged on the top surface of the connecting plate 4, and the top of the L-shaped plate 8 is connected to the inclined plate 19 by sliding, and the bottom surface of the inclined plate 19 is an inclined surface. The L-shaped plate 8 never leaves the inclined surface during the sliding of the bottom surface of the inclined plate 19, and the L-shaped plate 8 passes through the lifting groove 2 5 is slidably connected with the L-shaped vertical part of the fixed plate 2, a transverse groove is arranged inside the L-shaped vertical part of the fixed plate 2, and the inclined plate 19 is arranged inside the transverse groove. When the base body 1 is separated from the fixed plate 2, the transverse groove is connected with the first card groove, and when the bottom surface of the base body 1 contacts the ground, the transverse groove is connected with the second card groove. A second protrusion 11 is fixedly arranged on the right side of the inclined plate 19, and a second card groove adapted to the second protrusion 11 is arranged inside the first protrusion 3. The second protrusion 11 is slidably connected with the first protrusion 3 through the second card groove, and the inclined plate 19 A slide plate 20 is fixedly arranged on the left side, and the top surface of the slide plate 20 is connected to the inner wall of the horizontal groove by sliding. A spring 23 is fixedly arranged on the side of the slide plate 20 away from the inclined plate 19, and the end of the spring 23 away from the slide plate 20 is fixedly connected to the inner wall of the horizontal groove. A T-shaped slider 21 is fixedly arranged on the top surface of the slide plate 20, and a T-shaped slide groove 22 adapted to the T-shaped slider 21 is arranged inside the L-shaped vertical part of the fixed plate 2, and the T-shaped slide groove 22 is connected to the horizontal groove, and the T-shaped slider 21 is slidably connected to the fixed plate 2 through the T-shaped slide groove 22, and the L-shaped A second baffle 24 is fixedly provided on the bottom surface of the plate 8, and the second baffle 24 is slidably connected to the fixed plate 2 through the inner wall of the lifting groove 25. The second baffle 24 is close to the first baffle 9 to improve the sealing performance of the first baffle 9 to the lifting groove 25. The second protrusion 11 is engaged in the second slot to limit the position of the base body 1. The rotating plate 6 drives the second protrusion 11 away from the second slot to disassemble or install the base body 1 in the vertical direction, thereby reducing the difficulty of disassembling and installing the base body 1.

Specifically, when the base body 1 needs to be disassembled or installed, the rotating plate 6 is rotated to drive the connecting plate 4 to move downward, the connecting plate 4 moves to drive the L-shaped plate 8 to move downward, the L-shaped plate 8 moves to drive the second baffle plate 24 to move downward, and the second baffle plate 24 never contacts the bottom surface of the lifting groove 25 during the movement. As the L-shaped plate 8 moves, the spring 23 pulls the slide plate 20 to move away from the first slot, and the slide plate 20 moves to drive the inclined plate 19 and the second protrusion 11 to move away from the first slot until the second protrusion 11 is out of the second slot. The base body 1 can be moved upward or downward in the vertical direction. When the base body 1 is disassembled or installed and the position of the base body 1 needs to be limited, the base body 1 is installed on the inner side of the fixed plate 2 and the first protrusion 3 is engaged in the first slot. The rotating plate 6 is rotated in the opposite direction to drive the connecting plate 4 to move upward. The movement of the connecting plate 4 drives the L-shaped plate 8 to move upward. The movement of the L-shaped plate 8 drives the inclined plate 19 to move toward the first slot, thereby driving the second protrusion 11 to move toward the first slot until the second protrusion 11 is engaged in the second slot. The position of the second protrusion 11 is limited, thereby limiting the position of the base body 1.

As shown in Figures 1 to 5, a driving assembly is provided on the front and rear sides of the base body 1, and the driving assembly is composed of a first rotating rod 12, a first bevel gear 13, a second bevel gear 14, a second rotating rod 15, a third bevel gear 16, a fourth bevel gear 17 and a limiting plate 18. The first rotating rod 12 is penetrated inside the first baffle 9, and the first baffle 9 is fixedly connected to the first rotating rod 12. The left and right sides of the first rotating rod 12 are respectively connected with fixing plates by rotation, and the top surface of the fixing plate is fixedly connected to the bottom surface of the connecting plate 4. The fourth bevel gear 17 is fixedly provided on the outer side of the first rotating rod 12, and the outer side of the fourth bevel gear 17 is meshed with the third bevel gear 16, and the front side of the third bevel gear 16 is fixedly connected. A second rotating rod 15 is fixedly provided, a second bevel gear 14 is fixedly provided on the front side of the second rotating rod 15, a first bevel gear 13 is fixedly provided on the outer side of the threaded sleeve 5, the first bevel gear 13 and the second bevel gear 14 are meshedly connected, the outer side of the second rotating rod 15 is rotatably connected with a limiting plate 18, the top surface of the limiting plate 18 is fixedly connected to the bottom surface of the connecting plate 4, the driving component can drive the first baffle plate 9 to cover the lifting groove 25 when the rotating plate 6 is rotated to enable the limiting component to complete the limiting of the base body 1, and the first baffle plate 9 is driven to rotate upward by rotating the rotating plate 6 in the opposite direction during the disassembly or installation of the base body 1, so as to avoid the first baffle plate 9 from hindering the descent of the connecting plate 4.

Specifically, when the rotating plate 6 drives the limiting assembly to limit the base body 1, the rotating plate 6 rotates and drives the threaded sleeve 5 to rotate. The rotation of the threaded sleeve 5 drives the first bevel gear 13 to rotate. The rotation of the first bevel gear 13 drives the second bevel gear 14 to rotate. The rotation of the second bevel gear 14 drives the second rotating rod 15 and the third bevel gear 16 to rotate. The rotation of the third bevel gear 16 drives the fourth bevel gear 17 to rotate. The rotation of the fourth bevel gear 17 drives multiple first baffles 9 to rotate downward at the same time until the second protrusion 11 is engaged in the second slot. The first baffle 9 just fits tightly against the front side of the vertical part of the L-shaped fixed plate 2, thereby covering the front side of the lifting slot 25. During the disassembly or installation of the base body 1 by rotating the rotating plate 6, the reverse rotation of the rotating plate 6 drives the first baffle 9 to disengage from the lifting slot 25 and rotate upward. At the same time, the connecting plate 4 moves downward and drives the first baffle 9 to move downward. During the movement of the first baffle 9, it never contacts the top surface of the horizontal part of the fixed plate 2L.

Specific working principle:

When the device needs to disassemble or install the base body 1, the rotating plate 6 is rotated to drive the connecting plate 4 to move downward, and the connecting plate 4 moves to drive the L-shaped plate 8 to move downward. As the L-shaped plate 8 moves, the spring 23 pulls the slide plate 20 to move in the direction away from the first slot, and the slide plate 20 moves to drive the inclined plate 19 and the second protrusion 11 to move in the direction away from the first slot until the second protrusion 11 is separated from the second slot. The base body 1 can be disassembled or installed in the vertical direction by moving the base body 1 upward or downward, thereby reducing the difficulty of disassembling and installing the base body 1, and rotating the rotating plate 6 drives the limit assembly While limiting the base body 1, the rotation of the rotating plate 6 drives the threaded sleeve 5 to rotate, the rotation of the threaded sleeve 5 drives the first bevel gear 13 to rotate, the rotation of the first bevel gear 13 drives the second bevel gear 14 to rotate, the rotation of the second bevel gear 14 drives the second rotating rod 15 and the third bevel gear 16 to rotate, the rotation of the third bevel gear 16 drives the fourth bevel gear 17 to rotate, the rotation of the fourth bevel gear 17 drives multiple first baffles 9 to disengage from the lifting groove 25 and rotate upward at the same time, the connecting plate 4 moves downward to drive the first baffle 9 to move downward, and the first baffle 9 never contacts the top surface of the L-shaped horizontal part of the fixed plate 2 during the movement.

When the device needs to limit the position of the base body 1, the base body 1 is installed on the inner side of the fixed plate 2 and the first protrusion 3 is engaged in the first slot, the rotating plate 6 is rotated in the opposite direction to drive the connecting plate 4 to move upward, the connecting plate 4 moves to drive the L-shaped plate 8 to move upward, the L-shaped plate 8 moves to drive the inclined plate 19 to move in the direction close to the first slot, thereby driving the second protrusion 11 to move in the direction close to the first slot, until the second protrusion 11 is engaged in the second slot, the position of the second protrusion 11 is limited, thereby limiting the position of the base body 1, while the rotating plate 6 is rotated to drive the limiting assembly to limit the base body 1, The rotation of the rotating plate 6 drives the threaded sleeve 5 to rotate, the rotation of the threaded sleeve 5 drives the first bevel gear 13 to rotate, the rotation of the first bevel gear 13 drives the second bevel gear 14 to rotate, the rotation of the second bevel gear 14 drives the second rotating rod 15 and the third bevel gear 16 to rotate, the rotation of the third bevel gear 16 drives the fourth bevel gear 17 to rotate, the rotation of the fourth bevel gear 17 drives multiple first baffles 9 to rotate downward at the same time until the second protrusion 11 is engaged in the second slot, the first baffle 9 just clings to the front of the L-shaped vertical part of the fixed plate 2, thereby covering the front of the lifting slot 25 to prevent dust and impurities in the outside air from entering the lifting slot 25.

The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims (6)

1. The utility model provides a precast beam underframe base, includes base main part (1), fixed plate (2), first lug (3) and lift groove (25), both sides are fixed around base main part (1) and are provided with first lug (3) of symmetry, both sides are provided with fixed plate (2) of symmetry around base main part (1), the vertical part outside of fixed plate (2) L type is provided with lift groove (25), its characterized in that:

the limiting component is arranged between the fixed plate (2) and the first protruding block (3), and can improve the convenience of limiting the first protruding block (3) by the fixed plate (2);

The first baffle (9) is arranged outside the lifting groove (25), and the first baffle (9) can cover one side, communicated with the outside air, of the lifting groove (25);

The driving components are arranged on the front side and the rear side of the base main body (1), and can drive the first baffle plate (9) to cover the lifting groove (25) when the base main body (1) is installed.

2. A precast beam foundation as defined in claim 1, wherein: the utility model discloses a fixed plate, including fixed plate (2) L type, fixed plate (2) L type's vertical portion top surface is provided with the first draw-in groove of the first lug (3) of adaptation, first lug (3) are through first draw-in groove and fixed plate (2) sliding connection, and the fixed plate (2) L type's horizontal portion top surface is fixed to be provided with symmetrical guide bar (10), guide bar (10) outside is run through and is provided with connecting plate (4), and guide bar (10) pass through sliding connection with connecting plate (4), connecting plate (4) pass through sliding connection with the vertical portion of fixed plate (2) L type, fixed plate (2) L type's horizontal portion top surface is fixed to be provided with threaded rod (7), threaded rod (7) outside is provided with threaded sleeve (5) through threaded connection, threaded sleeve (5) outside is along vertical through the bearing rotation connection on connecting plate (4), and threaded sleeve (5) top surface is fixed to be provided with revolving plate (6).

3. A precast beam foundation as claimed in claim 2, wherein: the limiting component comprises an L-shaped plate (8), a second lug (11), a sloping plate (19), a sliding plate (20), a T-shaped sliding block (21), a T-shaped sliding groove (22), a spring (23) and a second baffle (24), wherein the L-shaped plate (8) is fixedly arranged on the top surface of the connecting plate (4), the sloping plate (19) is connected to the top end of the L-shaped plate (8) in a sliding manner, the sliding plate (20) and the second lug (11) are respectively fixedly arranged on the left side and the right side of the sloping plate (19), the spring (23) is fixedly arranged on one side, far away from the sloping plate (19), of the sliding plate (20), the T-shaped sliding block (21) is fixedly arranged on the top surface of the sliding plate (20), the T-shaped sliding groove (22) is arranged inside the vertical part of the L-shaped fixing plate (2), and the second baffle (24) is fixedly arranged on the bottom surface of the L-shaped plate (8).

4. A precast beam foundation as claimed in claim 3, in which: the utility model discloses a fixed plate, including fixed plate (2) L type, fixed plate (2) L type's vertical part is inside to be provided with the horizontal groove, first lug (3) inside second draw-in groove that is provided with adaptation second lug (11), second lug (11) pass through second draw-in groove and first lug (3) sliding connection, slide (20) top surface and horizontal groove inner wall pass through sliding connection, T type spout (22) are linked together with the horizontal groove, T type slider (21) and T type spout (22) looks adaptation, T type slider (21) pass through T type spout (22) and fixed plate (2) sliding connection, one end and horizontal groove inner wall fixed connection of slide (20) are kept away from to spring (23), L template (8) pass through lifting groove (25) inner wall and the vertical part sliding connection of fixed plate (2) L type.

5. A precast beam foundation as claimed in claim 2, wherein: the driving assembly comprises a first rotating rod (12), a first bevel gear (13), a second bevel gear (14), a second rotating rod (15), a third bevel gear (16), a fourth bevel gear (17) and a limiting plate (18), wherein the first rotating rod (12) is arranged inside a first baffle (9) in a penetrating mode, the fourth bevel gear (17) is fixedly arranged outside the first rotating rod (12), the third bevel gear (16) is connected to the outer side of the fourth bevel gear (17) through meshing, the second rotating rod (15) is fixedly arranged on the front face of the third bevel gear (16), the second bevel gear (14) is fixedly arranged on the front face of the second rotating rod (15), the first bevel gear (13) is fixedly arranged outside a threaded sleeve (5), and the limiting plate (18) is connected to the outer side of the second rotating rod (15) through rotation.

6. A precast beam foundation as defined in claim 5, wherein: the novel structure is characterized in that the first baffle (9) is fixedly connected with the first rotating rod (12), fixing plates are respectively connected to the left side and the right side of the first rotating rod (12) through rotation, the top surface of each fixing plate is fixedly connected with the bottom surface of the connecting plate (4), the first bevel gear (13) is connected with the second bevel gear (14) through meshing, and the top surface of the limiting plate (18) is fixedly connected with the bottom surface of the connecting plate (4).