A universal base precast concrete staircase vertical mold

Abstract

The present invention discloses a universal base precast concrete staircase vertical mold, which relates to the technical field of precast concrete component production and manufacturing, including a double-layer frame, a base mold, a stair upper mold and a stair lower mold. The double-layer frame is fixedly installed with a plurality of mold shaping mechanisms, and the lower side of the base mold is fixedly connected to the upper side of the double-layer frame. The present invention clamps the rotating rod through the angle rod to roll in the groove of the inner groove plate. The shape of the groove in the inner groove plate is an inverted rounded fan. When the rotating rod rolls in the arc length area of the inner groove plate groove, the curvature is relatively gentle. The rotating rod rolls quickly, causing the slide bar to swing at a certain angle, causing the knocking ball to knock the stair upper mold multiple times. By setting a knocking component, both ends of the stair upper mold are knocked and vibrated at the same time, generating a resonance effect, accelerating the even spreading of concrete, expelling the air remaining in the concrete, avoiding the formation of puddles and the continued storage of water, and delaying the rusting of the stair upper mold.

Description

Technical Field

[0001] The invention relates to the technical field of production and manufacturing of precast concrete components, in particular to a vertical mould for precast concrete stairs with a universal base. Background Art

[0002] With the continuous advancement of building industrialization, building components have gradually become prefabricated components, among which prefabricated stairs are more widely used. The standardization requirements for prefabricated stairs are relatively high. In order to improve the standardization of prefabricated stairs and mass production, prefabricated staircase molds are used to produce prefabricated stairs. The processes of prefabricated stairs are divided into vertical pouring, horizontal pouring and integrated surround pouring. The methods of producing prefabricated stairs are roughly the same, that is, cement is poured into the closed cavity of the prefabricated staircase mold. After a period of time, the cement solidifies and forms a prefabricated staircase. Concrete prefabricated stairs have superior plasticity, good water resistance, excellent durability and highly competitive economy, making them the first choice for staircase construction. In the process of mass production, the vertical production method is more convenient than the horizontal production method, takes less time and has better molding quality. Therefore, the use of vertical molds is also in urgent need of improvement to further improve the efficiency of vertical pouring.

[0003] For example, Chinese patent CN115122475A discloses an adjustable mold for a vertical prefabricated staircase, comprising an upper surface tread module, a lower surface tread module, an upper platform module, a lower platform module, and a corner module. The two ends of the upper surface tread module are connected to the upper platform module and the lower platform module, respectively, and the other ends of the upper platform module and the lower platform module are connected to the lower surface tread module via a corner module. Each of the above modules is composed of a plurality of box structures of different widths. The box structures have an opening structure, and the opposite end faces of the opening structure have a forming surface for forming, and the opening is surrounded by connecting parts for connection. This mold achieves the adjustment of the length and width of the prefabricated staircase through the design of modular staircase templates and angled special-shaped plates, improving the versatility and adjustability of the staircase mold, further improving the utilization rate of small unit molds, and significantly reducing the cost of the staircase mold.

[0004] However, in the existing technology, the vertical molds used in the production of prefabricated stairs are heavy. At the same time, during the concrete pouring process, the fluidity between the concrete and the mold template is poor. The larger the contact area between the two, the more likely it is that there will be air gaps. A certain amount of moisture will continue to remain in the gaps. During the period of concrete solidification, the gap moisture will not be immediately absorbed or dissipated, which can easily cause the mold template in this part to rust and can only be sold as scrap, resulting in serious waste of resources and high mold costs. Summary of the Invention

[0005] The purpose of the present invention is to provide a universal base precast concrete staircase vertical mold to solve the problem that the vertical mold used in the production of precast stairs proposed in the above background technology is heavy, and at the same time, during the concrete pouring process, the fluidity between the concrete and the mold template is poor. The larger the contact area between the two, the more likely it is that an air gap will exist, and a certain amount of moisture will continue to exist in the gap. During the period of concrete solidification, the gap moisture will not be immediately absorbed or dissipated, which can easily cause the mold template of this part to rust and can only be sold as scrap, resulting in serious waste of resources and high mold costs.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a universal base precast concrete staircase vertical mold, comprising a double-layer frame, a base mold, a stair upper mold, and a stair lower mold; a plurality of mold shaping mechanisms are fixedly installed inside the double-layer frame; the lower side of the base mold is fixedly connected to the upper side of the double-layer frame; one side of the stair upper mold is movably engaged with one side of the stair lower mold; and the lower ends of the stair upper mold and the lower ends of the stair lower mold are movably engaged with the inner wall of the base mold;

[0007] The upper mold of the stairs is movably connected to a stair forming mechanism, which includes a chain. The upper end of the chain is movably connected to a first gear, and the lower end of the chain is movably connected to a second gear. A knocking assembly is fixedly installed on the shaft of the second gear. Two sets of vertical holes are opened near the two ends of the upper mold of the stairs.

[0008] The knocking assembly includes a sliding rod, the upper end of the sliding rod is fixedly connected to a knocking ball, the outer side of the sliding rod is slidably engaged with a clamping block, the outer side of the clamping block is fixedly connected to a positioning box, one end of the positioning box is rotatably connected to a mounting plate, one side of the mounting plate is fixedly connected to an inner groove plate, the middle of the mounting plate is rotatably connected to a folding rod, one end of the folding rod is internally rolled and engaged with a rotating rod, one end of the rotating rod is rollingly engaged with the inner wall of the groove of the inner groove plate, and the other end of the rotating rod is rotatably connected to the lower end of the sliding rod;

[0009] By rotating the angle rod, the angle rod clamps the rotating rod and rolls in the groove of the inner groove plate. The shape of the groove in the inner groove plate is an inverted rounded fan. When the rotating rod rolls in the arc length area of the inner groove plate groove, the curvature is relatively gentle, and the rotating rod rolls quickly. The rotating rod pulls the slide bar to slide in the block and drives the positioning box to rotate inside the mounting plate. At this time, there is a swinging force on the upper end of the slide bar, and drives the knocking ball to knock on the cavity wall of the mold on the stairs. The rotating rod rotates according to the trajectory in the inner groove plate, causing the slide bar to swing at a certain angle, causing the knocking ball to knock on the mold on the stairs multiple times. During the concrete pouring process, by setting a knocking component, both ends of the mold on the stairs are knocked and vibrated at the same time, generating a resonance effect, accelerating the spreading of the concrete, and expelling the residual air inside the concrete, avoiding the formation of puddles and continued water retention, and delaying the rusting of the mold on the stairs.

[0010] Preferably, the lower side of the mounting plate is fixedly connected to the bottom surface of the inner wall of the upper mold of the stairs, and the other end of the angle rod is fixedly mounted to the shaft of the second gear; the mounting plate is fixed to the inner side of the upper mold of the stairs, and plays the role of supporting the entire knocking assembly, and is the carrier foundation. The second gear rotates in the mounting plate and serves as a power source.

[0011] Preferably, the shaft of the second gear and the shaft of the first gear are rotatably connected to the interior of the upper mold of the stairs, and a connecting block is fixedly connected to the outer side of the chain; the chain drives the first gear and the second gear to rotate, thereby converting gravitational potential energy into kinetic energy.

[0012] Preferably, the outer side of the connecting block is slidably engaged with the inner wall of the vertical hole, and the other end of the connecting block is fixedly connected to an end plate; the connecting blocks at both ends slide in the corresponding vertical holes to ensure vertical downward movement.

[0013] Preferably, the lower side of the end plate is fixedly connected to a bottom plate, the outer side of the bottom plate is movably engaged with the inner side of the upper mold of the stairs and the inner wall of the lower mold of the stairs, the lower side of the bottom plate is movably engaged with a number of springs, and the lower sides of the several springs are fixedly connected to the upper side of the base mold; the two end plates and a bottom plate form a movable inner mold frame, and then, concrete is poured into the upper mold of the stairs, the lower mold of the stairs and the inner mold frame. As the concrete is poured, the weight on the inner mold frame increases, causing the connecting blocks on both sides of the inner mold frame to slide downward in the corresponding vertical holes, and the two connecting blocks move downward, and at the same time drive the corresponding chains to start moving, and the chain movement drives the first gear and the second gear to rotate at the end of the upper mold of the stairs, wherein the several springs lift the inner mold frame so that its initial position is located at the upper mold of the stairs and the upper end of the upper mold of the stairs, which will not affect the subsequent concrete pouring to form the stairs.

[0014] Preferably, the outer sides of the upper mold of the stairs and the outer sides of the lower mold of the stairs are respectively movably connected with support columns, and the lower sides of the support columns are fixedly connected with movable plates; the movable plates drive the support columns to move to the middle position, and the same is true for the other side, temporarily fixing the upper mold of the stairs and the lower mold of the stairs to form a mold closing state.

[0015] Preferably, the lower end of the movable plate is internally slidably engaged with an annular track, and the outer side of the movable plate is fixedly connected with a connecting rod; the connecting rod is subjected to force to pull the movable plate to slide on the outer side of the annular track.

[0016] Preferably, the lower end of the connecting rod is rotatably connected to a curved rod, and the lower end of the curved rod is rotatably connected to a center plate; the two ends of the center plate respectively pull the curved rod to move, and the curved rod pulls the connecting rod.

[0017] Preferably, a servo motor is fixedly installed in the middle of the center plate, and the outer side of the servo motor is fixedly connected to the bottom frame; the two ends of the center plate respectively pull the arc rod to move, and the arc rod pulls the connecting rod.

[0018] Preferably, the upper side of the bottom frame is fixedly connected to the middle part of the lower side of the annular track, and the lower side of the bottom frame is fixedly connected to the inside of the double-layer frame; the bottom frame plays a supporting role, fixing the mold forming mechanism inside the double-layer frame.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In the present invention, when the rotating rod rolls in the arc length area of the groove of the inner groove plate, the curvature is relatively gentle, and the rotating rod rolls quickly. The rotating rod pulls the sliding rod to slide in the block and drives the positioning box to rotate inside the mounting plate. At this time, the upper end of the sliding rod has a swinging force, and drives the knocking ball to knock on the cavity wall of the mold on the stairs. The rotating rod rotates according to the trajectory in the inner groove plate, so that the sliding rod swings at a certain angle, so that the knocking ball knocks on the mold on the stairs multiple times. During the concrete pouring process, both ends of the mold on the stairs are knocked and vibrated at the same time, generating a resonance effect, accelerating the spreading of the concrete, and expelling the air remaining in the concrete, avoiding the formation of puddles and continued water retention, and delaying the rusting of the mold on the stairs.

[0021] 2. In the present invention, the increase in weight during concrete pouring is used to provide power for the knocking of the knocking assembly. A movable inner formwork frame is composed of two end plates and a bottom plate, and concrete is poured into the upper mold of the stairs, the lower mold of the stairs and the inner formwork frame. As the concrete is poured, the weight on the inner formwork frame increases, causing the connecting blocks on both sides of the inner formwork frame to slide downward in the corresponding vertical holes. The two connecting blocks move downward and simultaneously drive the corresponding chains to start moving. The movement of the chains drives the first gear and the second gear to rotate at the end of the upper mold of the stairs, and the second gear drives the angle rod to rotate, providing power for subsequent knocking.

[0022] 3. In the present invention, the stair forming mechanism is located inside the upper mold of the stairs, and the lower side of the connecting block is against the upper end of the spring, so that the connecting block is located at the uppermost end of the inner wall of the vertical hole. The servo motor is started, and the rotating shaft of the servo motor drives the center plate to rotate a certain angle. The two ends of the center plate respectively pull the arc rod to move, and the arc rod pulls the connecting rod. The connecting rod is pulled by force to pull the movable plate to slide on the outside of the circular track. The movable plate drives the supporting column to move to the middle position. The other end of the center plate follows the same principle, driving the other supporting column to move to the middle position. The height of the two support columns is higher than the height of the upper mold of the stairs and the lower mold of the stairs. In the process of approaching each other, the upper mold of the stairs and the lower mold of the stairs are temporarily fixed, and can quickly enter the mold closing state. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural schematic diagram of a universal base precast concrete staircase vertical mold of the present invention;

[0024] Figure 2 This is a structural schematic diagram of a second perspective of a vertical mold for a precast concrete staircase with a universal base according to the present invention;

[0025] Figure 3 This is a schematic diagram of the exploded structure of a precast concrete staircase vertical mold with a universal base according to the present invention;

[0026] Figure 4 This is a structural schematic diagram of a mold shaping mechanism in a vertical mold for precast concrete stairs with a universal base according to the present invention;

[0027] Figure 5 This is a schematic structural diagram of a staircase forming mechanism in a vertical mold for precast concrete stairs with a universal base according to the present invention, exploded from a first perspective;

[0028] Figure 6 This is a schematic structural diagram of a staircase forming mechanism in a vertical mold for precast concrete stairs with a universal base according to the present invention, exploded from a second perspective;

[0029] Figure 7 This is a schematic structural diagram of a partial staircase forming mechanism in a vertical mold for precast concrete stairs with a universal base according to the present invention;

[0030] Figure 8 The present invention is a schematic structural diagram of a knocking assembly in a vertical mold for a precast concrete staircase with a universal base.

[0031] In the picture:

[0032] 1. Double-layer rack; 2. Mold shaping mechanism; 21. Bottom frame; 22. Center plate; 23. Arc rod; 24. Connecting rod; 25. Annular track; 26. Moving plate; 27. Support column; 28. Servo motor; 3. Base mold; 4. Stairs upper mold; 5. Stairs forming mechanism; 51. End plate; 52. Bottom plate; 53. Connecting block; 54. Vertical hole; 55. First gear; 56. Chain; 57. Second gear; 58. Knocking assembly; 581. Knocking ball; 582. Sliding rod; 583. Block; 584. Positioning box; 585. Mounting plate; 586. Inner groove plate; 587. Angle rod; 588. Turning rod; 59. Spring; 6. Stairs lower mold. Implementation Method

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention. Example

[0034] Reference Figure 1-8 As shown: A universal base precast concrete staircase vertical mold, including a double-layer frame 1, a base mold 3, a stair upper mold 4 and a stair lower mold 6, a plurality of mold shaping mechanisms 2 are fixedly installed inside the double-layer frame 1, the lower side of the base mold 3 is fixedly connected to the upper side of the double-layer frame 1, one side of the stair upper mold 4 is movably connected to one side of the stair lower mold 6, the lower end of the stair upper mold 4 and the lower end of the stair lower mold 6 are movably connected to the inner wall of the base mold 3, the interior of the stair upper mold 4 is movably connected to a stair forming mechanism 5, and the stair forming mechanism 5 includes a chain 56, the upper end of the chain 56 is movably connected to a first gear 55, the lower end of the chain 56 is movably connected to a second gear 57, and the shaft of the second gear 57 is fixed A knocking assembly 58 is installed. Two groups of vertical holes 54 are opened inside the mold 4 on the stairs near both ends. The knocking assembly 58 includes a slide rod 582. The upper end of the slide rod 582 is fixedly connected to a knocking ball 581. The outer side of the slide rod 582 is slidably connected to a clamping block 583. The outer side of the clamping block 583 is fixedly connected to a positioning box 584. One end of the positioning box 584 is rotatably connected to a mounting plate 585. One side of the mounting plate 585 is fixedly connected to an inner groove plate 586. The middle part of the mounting plate 585 is rotatably connected to a corner rod 587. One end of the corner rod 587 is internally rolled and clamped with a rotating rod 588. One end of the rotating rod 588 is rollingly clamped with the inner wall of the groove of the inner groove plate 586, and the other end of the rotating rod 588 is rotatably connected to the lower end of the slide rod 582.

[0035] The working principle of this embodiment is as follows: by rotating the angle rod 587, the angle rod 587 clamps the rotating rod 588 and rolls in the groove of the inner groove plate 586. The shape of the groove in the inner groove plate 586 is an inverted rounded fan. When the rotating rod 588 rolls in the arc length area of the inner groove plate 586, the curvature is relatively gentle, and the rotating rod 588 rolls quickly. The rotating rod 588 pulls the slide bar 582 to slide in the block 583 and drives the positioning box 584 to rotate inside the mounting plate 585. At this time, the upper end of the slide bar 582 has a swinging force and drives The knocking ball 581 knocks on the cavity wall of the stair mold 4, and the rotating rod 588 rotates along the trajectory in the inner groove plate 586, so that the sliding rod 582 swings at a certain angle, so that the knocking ball 581 can knock on the stair mold 4 multiple times. During the concrete pouring process, by setting the knocking component 58, the two ends of the stair mold 4 are knocked and vibrated at the same time, generating a resonance effect, accelerating the spreading of the concrete, and expelling the residual air inside the concrete, avoiding the formation of puddles and the continued retention of water, and delaying the rusting of the stair mold 4. Example

[0036] according to Figure 1-Figure 7 As shown, the lower side of the mounting plate 585 is fixedly connected to the bottom surface of the inner wall of the upper mold 4 of the stairs, the other end of the angle rod 587 is fixedly installed with the shaft portion of the second gear 57, the shaft portion of the second gear 57 and the shaft portion of the first gear 55 are rotatably connected to the interior of the upper mold 4 of the stairs, the outer side of the chain 56 is fixedly connected with the connecting block 53, the outer side of the connecting block 53 is slidably engaged with the inner wall of the vertical hole 54, the other end of the connecting block 53 is fixedly connected to the end plate 51, the lower side of the end plate 51 is fixedly connected to the bottom plate 52, the outer side of the bottom plate 52 is movably engaged with the inner side of the upper mold 4 of the stairs and the inner wall of the lower mold 6 of the stairs, the lower side of the bottom plate 52 is movably engaged with a plurality of springs 59, and the lower sides of the plurality of springs 59 are fixedly connected to the upper side of the base mold 3;

[0037] The working principle of this embodiment is as follows: a movable inner formwork frame is formed by two end plates 51 and a bottom plate 52. Then, concrete is poured into the upper mold 4 of the stairs, the lower mold 6 of the stairs and the inner formwork frame. As the concrete is poured, the weight on the inner formwork frame increases, causing the connecting blocks 53 on both sides of the inner formwork frame to slide downward in the corresponding vertical holes 54. The two connecting blocks 53 move downward, and at the same time, drive the corresponding chains 56 to start moving. The movement of the chain 56 drives the first gear 55 and the second gear 57 to rotate at the end of the upper mold 4 of the stairs, and the second gear 57 drives the angle rod 587 to rotate. By setting up the stair forming mechanism 5, the increase in weight during concrete pouring is utilized as power to provide power for the knocking component 58 to knock. Example

[0038] according to Figure 1 - Figure 4As shown, the outer side of the upper mold 4 of the stairs and the outer side of the lower mold 6 of the stairs are respectively movably connected with support columns 27, the lower side of the support columns 27 is fixedly connected with a movable plate 26, the lower end of the movable plate 26 is internally slidably connected with a circular track 25, the outer side of the movable plate 26 is fixedly connected with a connecting rod 24, the lower end of the connecting rod 24 is rotatably connected to the arc rod 23, the lower end of the arc rod 23 is rotatably connected to the center plate 22, the middle part of the center plate 22 is fixedly installed with a servo motor 28, the outer side of the servo motor 28 is fixedly connected with a bottom frame 21, the upper side of the bottom frame 21 is fixedly connected to the lower middle part of the circular track 25, and the lower side of the bottom frame 21 is fixedly connected to the inside of the double-layer frame 1;

[0039] The working principle of this embodiment is as follows: the upper mold 4 and the lower mold 6 of the stairs are placed inside the base mold 3 according to corresponding positions, so that the upper mold 4 and the lower mold 6 of the stairs form a stair cavity. The stair forming mechanism 5 is located inside the upper mold 4 of the stairs. The lower side of the connecting block 53 is pressed against the upper end of the spring 59, so that the connecting block 53 is located at the uppermost end of the inner wall of the vertical hole 54. The servo motor 28 is started, and the rotating shaft of the servo motor 28 drives the center plate 22 to rotate a certain angle. The two ends of the center plate 22 respectively pull the arc rod 23 to move, and the arc rod 23 pulls the connecting block 53 to rotate. The connecting rod 24 and the connecting rod 24 are pulled by force to pull the movable plate 26 to slide on the outside of the circular track 25. The movable plate 26 drives the support column 27 to move to the middle position. The other end of the center plate 22 follows the same principle, driving another support column 27 to move to the middle position. The heights of the two support columns 27 are higher than the heights of the upper mold 4 and the lower mold 6 of the stairs. In the process of approaching each other, the upper mold 4 and the lower mold 6 of the stairs are temporarily fixed to form a mold closing state. By setting the mold finalizing mechanism 2, the upper mold 4 and the lower mold 6 of the stairs are temporarily fixed and the mold closing is performed.

[0040] The usage and working principle of this device are as follows: When using the universal base precast concrete stair vertical mold, first, the upper stair mold 4 and the lower stair mold 6 are placed inside the base mold 3 according to corresponding positions, so that the upper stair mold 4 and the lower stair mold 6 form a stair cavity, and the stair forming mechanism 5 is located inside the upper stair mold 4, and the lower side of the connecting block 53 is against the upper end of the spring 59, so that the connecting block 53 is located at the uppermost end of the inner wall of the vertical hole 54.

[0041] Next, start the servo motor 28, and the rotating shaft of the servo motor 28 drives the center plate 22 to rotate a certain angle. The two ends of the center plate 22 respectively pull the arc rod 23 to move, and the arc rod 23 pulls the connecting rod 24. The connecting rod 24 is pulled by the force to pull the movable plate 26 to slide on the outside of the circular track 25. The movable plate 26 drives the support column 27 to move to the middle position. The other end of the center plate 22 follows the same principle, driving the other support column 27 to move to the middle position. The height of the two support columns 27 is higher than the height of the upper mold 4 of the stairs and the lower mold 6 of the stairs. In the process of approaching each other, the upper mold 4 of the stairs and the lower mold 6 of the stairs are temporarily fixed to form a mold closing state, and the two end plates 51 and a bottom plate 52 form a movable inner mold frame.

[0042] Then, concrete is poured into the upper mold 4 of the stairs, the lower mold 6 of the stairs and the inner mold frame. As the concrete is poured, the weight on the inner mold frame increases, causing the connecting blocks 53 on both sides of the inner mold frame to slide downward in the corresponding vertical holes 54. The two connecting blocks 53 move downward, and at the same time, they respectively drive the corresponding chains 56 to start moving. The movement of the chain 56 drives the first gear 55 and the second gear 57 to rotate at the end of the upper mold 4 of the stairs, and the second gear 57 drives the angle rod 587 to rotate. The angle rod 587 clamps the rotating rod 588 and rolls in the groove of the inner groove plate 586, wherein the shape of the groove in the inner groove plate 586 is an inverted rounded fan.

[0043] When the rotating rod 588 rolls in the arc length area of the groove of the inner groove plate 586, the curvature is relatively gentle, and the rotating rod 588 rolls quickly. The rotating rod 588 pulls the sliding rod 582 to slide in the block 583, and drives the positioning box 584 to rotate inside the mounting plate 585. At this time, there is a swinging force on the upper end of the sliding rod 582, and drives the knocking ball 581 to knock on the cavity wall of the upper mold 4 of the stairs. The rotating rod 588 rotates according to the trajectory in the inner groove plate 586, so that the sliding rod 582 swings at a certain angle, driving the knocking ball 581 to knock on the upper mold 4 of the stairs multiple times. During the concrete pouring process, both ends of the upper mold 4 of the stairs are knocked and vibrated at the same time, generating a resonance effect, accelerating the spreading of the concrete, and expelling the residual air inside the concrete, avoiding the formation of puddles and continued water retention.

[0044] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A universal base precast concrete staircase vertical mold, comprising a double-layer frame (1), a base mold (3), an upper staircase mold (4) and a lower staircase mold (6), characterized in that: A plurality of mold shaping mechanisms (2) are fixedly installed inside the double-layer frame (1); the lower side of the base mold (3) is fixedly connected to the upper side of the double-layer frame (1); one side of the stair upper mold (4) is movably connected to one side of the stair lower mold (6); and the lower end of the stair upper mold (4) and the lower end of the stair lower mold (6) are movably connected to the inner wall of the base mold (3); The stair upper mold (4) is movably connected to a stair forming mechanism (5), and the stair forming mechanism (5) includes a chain (56). The upper end of the chain (56) is movably connected to a first gear (55), and the lower end of the chain (56) is movably connected to a second gear (57). A knocking assembly (58) is fixedly installed on the shaft of the second gear (57). Two sets of vertical holes (54) are opened near the two ends of the stair upper mold (4). The knocking assembly (58) includes a slide bar (582), the upper end of the slide bar (582) is fixedly connected to a knocking ball (581), the outer side of the slide bar (582) is slidably engaged with a clamping block (583), the outer side of the clamping block (583) is fixedly connected to a positioning box (584), one end of the positioning box (584) is rotatably connected to a mounting plate (585), one side of the mounting plate (585) is fixedly connected to an inner groove plate (586), the middle part of the mounting plate (585) is rotatably connected to a folding rod (587), one end of the folding rod (587) is internally rolling engaged with a rotating rod (588), one end of the rotating rod (588) is rolling engaged with the inner wall of the groove of the inner groove plate (586), and the other end of the rotating rod (588) is rotatably connected to the lower end of the slide bar (582); The lower side of the mounting plate (585) is fixedly connected to the bottom surface of the inner wall of the upper stair mold (4), the other end of the angled rod (587) is fixedly installed to the shaft of the second gear (57), the shaft of the second gear (57) and the shaft of the first gear (55) are both rotatably connected to the inside of the upper stair mold (4), the outer side of the chain (56) is fixedly connected to a connecting block (53), the outer side of the connecting block (53) is slidably engaged with the inner wall of the vertical hole (54), the other end of the connecting block (53) is fixedly connected to an end plate (51), the lower side of the end plate (51) is fixedly connected to a bottom plate (52), the bottom plate (52) is located between the inner side of the upper stair mold (4) and the inner wall of the lower stair mold (6), the lower side of the bottom plate (52) is movably engaged with a plurality of springs (59), the lower side of each spring (59) is fixedly connected to the upper side of the base mold (3).

2. The universal base precast concrete staircase vertical mold according to claim 1, characterized in that: A support column (27) is movably connected to the outer side of the upper stair mold (4) and the outer side of the lower stair mold (6), and a movable plate (26) is fixedly connected to the lower side of the two support columns (27).

3. The universal base precast concrete staircase vertical mold according to claim 2, characterized in that: The lower end of the movable plate (26) is internally slidably engaged with an annular track (25), and the outer side of the movable plate (26) is fixedly connected with a connecting rod (24).

4. The universal base precast concrete staircase vertical mold according to claim 3, characterized in that: The lower end of the connecting rod (24) is rotatably connected to the arc rod (23), and the lower end of the arc rod (23) is rotatably connected to the center plate (22).

5. The universal base precast concrete staircase vertical mold according to claim 4, characterized in that: A servo motor (28) is fixedly mounted in the middle of the center plate (22), and a bottom frame (21) is fixedly connected to the outer side of the servo motor (28).

6. The universal base precast concrete staircase vertical mold according to claim 5, characterized in that: The upper side of the bottom frame (21) is fixedly connected to the middle portion of the lower side of the annular track (25), and the lower side of the bottom frame (21) is fixedly connected to the interior of the double-layer frame (1).

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