Prefabricated box girder length-adjustable movable pedestal

Abstract

The utility model discloses a prefabricated box girder length-adjustable movable pedestal, which belongs to the technical field of prefabricated box girder pedestals, and comprises a base, a support raised line is fixed on the upper surface of the base, a support plate is arranged above the base, and the left side and the right side of the support plate are connected with connecting frames through bolts; guide wheels are installed at the lower end of the connecting frame, guide rails are arranged on the left side and the right side of the upper surface of the base, and the guide wheels roll on the corresponding guide rails. According to the beam-length-adjustable movable pedestal for the prefabricated box beam, adjusting plates are connected to the left side and the right side of the upper surface of the supporting plate in a sliding mode. According to the beam-length-adjustable movable pedestal for the prefabricated box beam, a motor drives a driving gear to rotate through a shaft rod, meanwhile, the driving gear drives an adjusting gear meshed with the driving gear to rotate, so that a bidirectional threaded rod rotates, adjusting plates at the two ends are driven to move relatively or oppositely, and therefore adjustment can be conducted according to the sizes of different prefabricated box beams; and the applicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of prefabricated box girder pedestals, in particular to a prefabricated box girder length-adjustable movable pedestal. Background Art

[0002] With the improvement of construction technology, prefabricated box beams are generally used in the construction of bridge projects. The interior of the box beam is hollow, and there are flanges on both sides of the upper part, similar to a box. The prefabricated box beam combined with the bridge erection machine can be erected after the lower project is completed. Compared with cast-in-place beams, it accelerates the progress of the project, saves construction period, is not restricted by the environment, and reduces the difficulty of construction. For example, an adjustable prefabricated box beam pedestal with a publication number of "CN214353152U" has a reasonable structure and the advantages of strong applicability. The prefabrication of prefabricated beams with different beam lengths reduces the floor space of the prefabricated beam yard, improves the utilization rate of the prefabricated box beam pedestal, and is conducive to controlling construction costs; in addition, the setting of the movable plate ensures the surface contact between the box beam and the pillar, effectively ensuring the quality of the box beam made by the prefabricated post-tensioning method;

[0003] When the above mechanism is in use, the prefabricated box beam is placed on a pedestal and then transported using the guide wheels on the pedestal. However, since the sizes of different prefabricated box beams are different, it is necessary to make a pedestal that matches the size of the prefabricated box beam. The width of the pedestal cannot be adjusted according to the prefabricated box beams of different sizes, resulting in low applicability.

[0004] Therefore, we proposed a prefabricated box girder with adjustable length movable pedestal to solve the above problems well. Utility Model Content

[0005] The purpose of the utility model is to provide a movable pedestal with adjustable length of a prefabricated box girder, so as to solve the problem of low applicability caused by the different sizes of prefabricated box girders proposed in the above-mentioned background technology, that is, due to the different sizes of prefabricated box girders, it is necessary to make a pedestal matching the sizes of the prefabricated box girders, and the width of the pedestal cannot be adjusted according to the prefabricated box girders of different sizes.

[0006] To achieve the above object, the utility model provides the following technical solution: a prefabricated box beam length adjustable movable pedestal, comprising a base, a support convex strip is fixed to the upper surface of the base, and a support plate is arranged above the base, and the left and right sides of the support plate are both bolted with a connecting frame;

[0007] A guide wheel is installed at the lower end of the connecting frame, and guide rails are provided on both the left and right sides of the upper surface of the base, and the guide wheel rolls on the corresponding guide rails;

[0008] A prefabricated box girder length adjustable movable pedestal, further comprising:

[0009] The left and right sides of the upper surface of the support plate are slidably connected with adjustment plates, and a motor is installed in the middle position of the support plate, and the output end of the motor is fixedly connected to a shaft rod, and a driving gear is fixedly sleeved on the outer side of the shaft rod;

[0010] A bidirectional threaded rod is arranged between the two adjusting plates, and an adjusting gear is sleeved and fixed on the outer side of the middle part of the bidirectional threaded rod.

[0011] Preferably, the support plate and the support convex strip are slidably connected, the positions of the driving gear and the adjusting gear correspond to each other, and the driving gear and the adjusting gear are meshingly connected, both ends of the bidirectional threaded rod extend into the interior of the two adjusting plates, and the bidirectional threaded rod and the two adjusting plates are threadedly connected.

[0012] Preferably, a receiving groove is provided inside the two adjustment plates, and a movable plate is provided above the two adjustment plates, a rack is slidably connected to the bottom of the inner wall of the receiving groove, and the rack and the movable plate are connected by a connecting rod, a rotating rod is rotatably connected to the inside of the two adjustment plates above the rack, and a clamping plate is fixedly sleeved on the outer side of the rotating rod, and a driven gear is fixedly sleeved on the outer side of the middle part of the rotating rod, and the top of the clamping plate passes through the interior of the adjustment plate.

[0013] Preferably, the rack is meshingly connected to the driven gear, the two ends of the connecting rod are hingedly connected to one side of the top of the rack and the bottom of the movable plate respectively, and the rack forms an elastic telescopic structure through a buffer spring.

[0014] Preferably, rubber blocks are provided on the opposite surfaces of the two clamping plates.

[0015] Preferably, movable magnets are installed at the four corners of the bottom of the movable plate, and fixed magnets are installed on the left and right sides of the inner wall of the accommodating groove.

[0016] Preferably, the positions of the movable magnets and the fixed magnets correspond one to one, and the magnetic poles of the opposing surfaces of the movable magnets and the fixed magnets are the same.

[0017] Compared with the prior art, the utility model has the following beneficial effects: the prefabricated box beam length adjustable movable pedestal adopts a new structural design, and its specific contents are as follows:

[0018] (1) The motor drives the driving gear to rotate through the shaft, and the driving gear drives the meshing adjusting gear to rotate, so that the bidirectional threaded rod rotates and drives the adjusting plates at both ends to move relative or oppositely, so that it can be adjusted according to the sizes of different prefabricated box girders, with strong applicability;

[0019] (2) When the prefabricated box girder is placed on the adjustment plate, the movable plate will move downward due to the gravity of the prefabricated box girder, causing the connecting rod to rotate and push the rack to move. At the same time, the rack drives the meshing driven gear to rotate. At this time, the rotating rod drives the clamping plate to rotate and clamp the prefabricated box girder to prevent the prefabricated box girder from falling during the movement.

[0020] Furthermore, when the clamping plate rotates, the rubber pad will contact the surface of the prefabricated box beam, thereby increasing the friction with the prefabricated box beam and improving the stability of the fixation of the prefabricated box beam;

[0021] Furthermore, when the prefabricated box beam is hoisted, the rack is reset under the elastic force of the buffer spring, and the connecting rod is rotated, and the movable plate is driven to reset upward, and at the same time, the rack drives the meshing driven gear to rotate and reset, so that the clamping plate no longer clamps and fixes the prefabricated box beam;

[0022] (3) When the movable plate moves downward, it will drive the movable magnet to move toward the direction of the fixed magnet. At this time, the movable plate will have an upward force by utilizing the principle that like-charged magnets repel each other. At the same time, the elastic force of the buffer spring can effectively buffer the gravity of the prefabricated box girder, thereby preventing the support plate from being crushed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the rotating structure of the clamping plate of the utility model;

[0025] Figure 3 This is a schematic diagram of the top view of the clamping plate and the adjusting plate of the utility model;

[0026] Figure 4 This is a schematic diagram of the three-dimensional structure of the rack and the connecting rod of the utility model;

[0027] Figure 5 This is a schematic diagram of the three-dimensional structure of the adjustment and driving gears and the bidirectional threaded rod of the utility model;

[0028] Figure 6 For this utility model Figure 1 The enlarged structural diagram at A in the middle;

[0029] Figure 7 For this utility model Figure 1 Enlarged structural diagram at B in the middle.

[0030] In the figure: 1. base; 2. support plate; 3. guide wheel; 4. connecting frame; 5. supporting convex strip; 6. bidirectional threaded rod; 7. adjustment plate; 8. shaft rod; 9. driving gear; 10. adjustment gear; 11. rubber block; 12. driven gear; 13. rack; 14. accommodating groove; 15. movable plate; 16. movable magnet; 17. fixed magnet; 18. connecting rod; 19. buffer spring; 20. clamping plate; 21. rotating rod. DETAILED DESCRIPTION

[0031] 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.

[0032] See also Figure 1-Figure 7 , the utility model provides the following technical solutions: a prefabricated box girder with adjustable beam length and movable pedestal;

[0033] Embodiment 1: In order to solve the problem that the sizes of different prefabricated box beams are different in the prior art, it is necessary to make a pedestal matching the size of the prefabricated box beam, and the width of the pedestal cannot be adjusted according to the prefabricated box beams of different sizes, resulting in low applicability, the following solution is disclosed, and specific reference is made to Figure 1-Figure 3 and Figure 5 and Figure 6 As shown, it includes a base 1, a support convex strip 5 is fixed on the upper surface of the base 1, and a support plate 2 is arranged above the base 1, the support plate 2 and the support convex strip 5 are slidably connected, and the left and right sides of the support plate 2 are bolted with a connecting frame 4;

[0034] A guide wheel 3 is installed at the lower end of the connecting frame 4, and guide rails are provided on both sides of the upper surface of the base 1, and the guide wheel 3 rolls on the corresponding guide rails;

[0035] It also includes: adjustment plates 7 are slidably connected to the left and right sides of the upper surface of the support plate 2, and a motor is installed in the middle position inside the support plate 2, and the output end of the motor is fixedly connected to a shaft rod 8, and a driving gear 9 is fixedly sleeved on the outer side of the shaft rod 8; a bidirectional threaded rod 6 is arranged between the two adjustment plates 7, and an adjustment gear 10 is fixedly sleeved on the outer side of the middle part of the bidirectional threaded rod 6, the positions of the driving gear 9 and the adjustment gear 10 correspond, and the driving gear 9 and the adjustment gear 10 are meshedly connected, both ends of the bidirectional threaded rod 6 extend into the interior of the two adjustment plates 7, and the bidirectional threaded rod 6 and the two adjustment plates 7 are threadedly connected;

[0036] Start the motor, and the motor drives the driving gear 9 to rotate through the shaft 8. At the same time, the driving gear 9 drives the meshing adjusting gear 10 to rotate, so that the bidirectional threaded rod 6 rotates, and drives the adjusting plates 7 at both ends to move relative or oppositely, so that it can be adjusted according to the sizes of different prefabricated box girders, and has strong applicability. Then the prefabricated box girder is placed on the two adjusting plates 7, and then the support plate 2 is pushed to make the guide wheel 3 move in the guide rail, so as to facilitate the transportation of the prefabricated box girder.

[0037] Embodiment 2: Different from Embodiment 1, this embodiment utilizes two clamping plates 20 to rotate, which can clamp and fix the prefabricated box beam placed on the adjustment plate 7 to prevent the prefabricated box beam from falling during transportation. Figure 1-Figure 4 and Figure 7 As shown, a receiving groove 14 is provided inside the two adjustment plates 7, and a movable plate 15 is provided above the two adjustment plates 7. A rack 13 is slidably connected to the bottom of the inner wall of the receiving groove 14, and the rack 13 and the movable plate 15 are connected by a connecting rod 18. A rotating rod 21 is rotatably connected above the rack 13 inside the two adjustment plates 7, and a clamping plate 20 is sleeved and fixed on the outer side of the rotating rod 21, and a driven gear 12 is sleeved and fixed on the outer side of the middle part of the rotating rod 21. The top of the clamping plate 20 passes through the interior of the adjustment plate 7, and rubber blocks 11 are provided on the opposite surfaces of the two clamping plates 20. The rack 13 and the driven gear 12 are meshedly connected, and the two ends of the connecting rod 18 are respectively hingedly connected to one side of the top of the rack 13 and the bottom of the movable plate 15, and the rack 13 forms an elastic telescopic structure through a buffer spring 19.

[0038] When the prefabricated box girder is placed on the adjustment plate 7, the movable plate 15 will move downward due to the gravity of the prefabricated box girder, causing the connecting rod 18 to rotate and push the rack 13 to move. At the same time, the rack 13 drives the meshing driven gear 12 to rotate. At this time, the rotating rod 21 drives the clamping plate 20 to rotate and clamps the prefabricated box girder to prevent the prefabricated box girder from falling during the movement. When the clamping plate 20 rotates, it contacts the surface of the prefabricated box girder through the rubber block 11, which can increase the friction with the prefabricated box girder and improve the stability of the fixation of the prefabricated box girder.

[0039] Embodiment 3: Different from Embodiment 2, this embodiment utilizes the reaction force generated by the repulsion of like-pole magnets and cooperates with the elastic force of the buffer spring 19 to effectively buffer the gravity of the prefabricated box beam and prevent the adjustment plate 7 from being crushed. For details, refer to Figure 1 , Figure 2 , Figure 4 and Figure 7As shown, movable magnets 16 are installed at the four corners of the bottom of the movable plate 15, and fixed magnets 17 are installed on the left and right sides of the inner wall of the accommodating groove 14. The positions of the movable magnets 16 and the fixed magnets 17 correspond one to one, and the magnetic poles of the opposite surfaces of the movable magnets 16 and the fixed magnets 17 are the same;

[0040] When the movable plate 15 moves downward, it will drive the movable magnet 16 to move towards the direction of the fixed magnet 17. At this time, the movable plate 15 will have an upward effect by utilizing the principle that like-charged magnets repel each other. At the same time, the elastic force of the buffer spring 19 can effectively buffer the gravity of the prefabricated box girder, thereby preventing the support plate 2 from being crushed.

[0041] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0042] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or 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 shall be included in the protection scope of the present invention.

Claims

1. A prefabricated box girder movable pedestal with adjustable beam length, comprising a base (1), a support convex strip (5) being fixed to the upper surface of the base (1), and a support plate (2) being arranged above the base (1), and a connecting frame (4) being bolted to the left and right sides of the support plate (2); A guide wheel (3) is installed at the lower end of the connecting frame (4), and guide rails are provided on both left and right sides of the upper surface of the base (1), and the guide wheel (3) rolls on the corresponding guide rails; It is characterized in that Also includes: The left and right sides of the upper surface of the support plate (2) are slidably connected to adjustment plates (7), and a motor is installed in the middle position inside the support plate (2), and the output end of the motor is fixedly connected to a shaft (8), and a driving gear (9) is fixedly sleeved on the outer side of the shaft (8); A bidirectional threaded rod (6) is provided between the two adjustment plates (7), and an adjustment gear (10) is sleeved and fixed on the outer side of the middle portion of the bidirectional threaded rod (6).

2. The movable pedestal with adjustable length of prefabricated box beam according to claim 1, characterized in that: The support plate (2) and the support convex strip (5) are slidably connected, the positions of the driving gear (9) and the adjusting gear (10) correspond to each other, and the driving gear (9) and the adjusting gear (10) are meshingly connected, both ends of the bidirectional threaded rod (6) extend into the interior of the two adjusting plates (7), and the bidirectional threaded rod (6) and the two adjusting plates (7) are threadedly connected.

3. The movable pedestal with adjustable length of prefabricated box beam according to claim 1, characterized in that: The two adjustment plates (7) are provided with a receiving groove (14) inside, and a movable plate (15) is arranged above the two adjustment plates (7). A rack (13) is slidably connected to the bottom of the inner wall of the receiving groove (14), and the rack (13) and the movable plate (15) are connected via a connecting rod (18). A rotating rod (21) is rotatably connected above the rack (13) inside the two adjustment plates (7), and a clamping plate (20) is sleeved and fixed on the outer side of the rotating rod (21), and a driven gear (12) is sleeved and fixed on the outer side of the middle part of the rotating rod (21), and the top of the clamping plate (20) passes through the inside of the adjustment plate (7).

4. The movable pedestal with adjustable length of prefabricated box beam according to claim 3, characterized in that: The rack (13) and the driven gear (12) are meshingly connected, and both ends of the connecting rod (18) are respectively hingedly connected to one side of the top of the rack (13) and the bottom of the movable plate (15), and the rack (13) forms an elastic telescopic structure through a buffer spring (19).

5. The movable pedestal with adjustable length of prefabricated box beam according to claim 3, characterized in that: The opposite surfaces of the two clamping plates (20) are both provided with rubber blocks (11).

6. The movable pedestal with adjustable length of prefabricated box beam according to claim 3, characterized in that: Movable magnets (16) are installed at the four corners of the bottom of the movable plate (15), and fixed magnets (17) are installed on the left and right sides of the inner wall of the accommodating groove (14).

7. The movable pedestal with adjustable length of prefabricated box beam according to claim 6, characterized in that: The positions of the movable magnet (16) and the fixed magnet (17) correspond one to one, and the magnetic poles of the opposite surfaces of the movable magnet (16) and the fixed magnet (17) are the same.

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