Synchronous jacking driving device

Abstract

The utility model relates to the technical field of bridge maintenance equipment, and discloses a synchronous jacking driving device, which comprises a guide seat, a driving unit and a plurality of groups of jacking units distributed along a guide rail, the driving unit adopts a double-shaft motor, and an output shaft of the driving unit is connected with a rotating shaft to drive the jacking units to work; the jacking unit comprises a power box, and the interior of the jacking unit is in meshing transmission with a driven bevel gear through a driving bevel gear to drive a threaded rod to rotate, so that a threaded sleeve rod linearly ascends and descends in a guide column, and a bridge is lifted. The adjusting assembly is composed of a sliding base, a guide rail tooth groove and a driving gear, the motor drives the gear to move along a guide rail, and transverse position adjustment of the jacking unit is achieved. The micro hydraulic telescopic rod controls the toothed plate to be meshed and locked with the rotating shaft limiting rack, so that the operation stability is ensured; according to the scheme, multi-unit synchronous lifting is achieved through mechanical hard connection, the problems that traditional hydraulic jacking is poor in synchronism and insufficient in adaptability are effectively solved, and the hydraulic jacking device is suitable for large-span bridge support replacement projects.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge maintenance equipment, in particular to a synchronous lifting drive device. Background Art

[0002] The bridge jacking project is a project to repair or replace aging and worn bridge bearings. By lifting the bridge beam, the bridge beam and bridge piers are separated, so that the bridge piers can be repaired and replaced.

[0003] In the prior art, hydraulic jack working platforms are commonly used for bridge jacking operations. In particular, for modern common composite box girder bridge structures, it is usually necessary to configure multiple jacks under each box girder to work together.

[0004] However, this traditional jacking method has significant technical limitations: first, since each jack is driven by an independent hydraulic system, it is difficult to ensure the synchronization of all jacking points in actual operations, and differences in jacking rates can easily lead to uneven force on the beam; second, the position of traditional jacks is difficult to adjust after it is fixed, and cannot adapt to the distribution characteristics of bridge supports of different spans.

[0005] Therefore, we propose a synchronous lifting drive device to solve the problems in the above background. Utility Model Content

[0006] The utility model provides a synchronous jacking drive device, which can solve the problem in the prior art that the jack position of the bridge jacking project is difficult to adjust after being fixed, and cannot adapt to the distribution characteristics of bridge supports of different spans.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] A synchronous lifting drive device includes a guide seat, a synchronous lifting mechanism is installed on the guide seat, the synchronous lifting mechanism includes a driving unit and a lifting unit, and the lifting unit is equipped with an adjustment component for adjusting the position of the lifting unit;

[0009] The driving unit includes a dual-axis motor, which is fixedly mounted on the guide seat, and the output shafts at both ends of the dual-axis motor are respectively fixedly connected to the rotating shaft;

[0010] The jacking unit includes a power box, and a driving bevel gear and a driven bevel gear are rotated inside the power box. The driving bevel gear is fixedly mounted on the rotating shaft, and the driving bevel gear and the driven bevel gear are meshed. The driven bevel gear is connected to a linear push assembly.

[0011] Preferably, the linear pushing assembly includes a threaded rod, which coincides with the axis of the driven bevel gear and is fixedly connected, the external thread of the threaded rod is matched with a threaded sleeve rod, the upper part of the power box is fixedly connected to a guide column, and the threaded sleeve rod is slidably connected to the inside of the guide column.

[0012] Preferably, a guide bar is fixedly connected to the outside of the threaded sleeve, a limiting sliding groove is provided inside the guide column, and the guide bar is slidably connected to the inside of the limiting sliding groove.

[0013] Preferably, one end of the threaded sleeve away from the power box is fixedly connected to a top plate, and a distance sensor for monitoring lifting displacement is fixedly mounted on the top plate.

[0014] Preferably, the adjustment assembly includes a sliding seat, which is fixedly connected to an end of the power box away from the guide column. A guide rail is radially provided on the guide seat, and the sliding seat is slidably connected to the inside of the guide rail.

[0015] Preferably, a linearly distributed tooth groove is provided on one side of the guide rail, a driving gear is rotatably connected inside the sliding seat, the driving gear is engaged with the tooth groove, and a motor is fixedly connected inside the sliding seat to drive the driving gear to rotate.

[0016] Preferably, the adjustment component further comprises a micro hydraulic telescopic rod, which is installed inside the active bevel gear. A telescopic slot is provided at a position where the active bevel gear is in contact with the rotating shaft, and a toothed plate is slidably connected inside the telescopic slot.

[0017] Preferably, a driving groove is opened in the axial direction on the surface of the rotating shaft, and a linearly distributed limiting rack is arranged inside the driving groove. The limiting rack is arranged perpendicular to the axial direction of the rotating shaft, and the tooth plate cooperates with the limiting rack.

[0018] Preferably, a multi-channel hydraulic rotary joint is provided on one side of the active bevel gear, and the multi-channel hydraulic rotary joint is used to transport oil to the micro hydraulic telescopic rod inside the active bevel gear, and the multi-channel hydraulic rotary joint is installed inside the power box.

[0019] Preferably, multiple groups of lifting units are provided, and the multiple groups of lifting units are arranged along the guide rail direction.

[0020] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0021] The precise position adjustment of the jacking unit of the present invention is mainly completed by an adjustment component, which includes a sliding seat, a guide rail, a driving gear and a tooth plate locking mechanism. The sliding seat is fixedly connected to the power box and slidably installed on the guide rail of the guide seat. The linear tooth groove on the inner side of the guide rail is engaged with the driving gear in the sliding seat. The jacking unit can be driven to move laterally along the guide rail by rotating the motor-driven gear, and the positioning is controlled by the micro-hydraulic telescopic rod inside the active bevel gear; when locking is required, the hydraulic oil starts the micro-hydraulic telescopic rod through the multi-channel rotary joint, so that the tooth plate is stuck in the limit rack in the driving groove on the surface of the rotating shaft, and the active bevel gear is rigidly connected to the rotating shaft, completely fixing the position of the jacking unit; when adjustment is required, the hydraulic system relieves pressure to retract the tooth plate, releases the lock of the gear and the rotating shaft, and at this time the driving gear can accurately drive the jacking unit to move to the target position and then re-lock it. In addition, the device prevents deflection through the cooperation of guide strips and slide grooves in the guide column, and the distance sensor monitors the jacking height in real time, ultimately achieving synchronous lifting and flexible positioning of multiple jacking units within the millimeter-level error range, effectively solving the technical problems of poor synchronization and difficult position adjustment of traditional jacking devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall external structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the overall side structure of the utility model;

[0024] Figure 3 This is a schematic diagram of the installation structure of the driving bevel gear and the driven bevel gear of the utility model;

[0025] Figure 4 This is a schematic diagram of the internal cross-sectional structure of the guide column of the present utility model;

[0026] Figure 5 This is a schematic diagram of the sliding seat connection structure of the utility model;

[0027] Figure 6 This is a schematic diagram of the overall side sectional structure of the utility model;

[0028] Figure 7 For the utility model Figure 6 Schematic diagram of the partially enlarged structure.

[0029] Among them: 1. Guide seat; 2. Dual-axis motor; 3. Rotating shaft; 41. Active bevel gear; 42. Driven bevel gear; 5. Power box; 6. Threaded rod; 7. Threaded sleeve rod; 8. Guide column; 9. Guide bar; 10. Top plate; 11. Distance sensor; 21. Sliding seat; 22. Guide rail; 23. Drive gear; 24. Micro hydraulic telescopic rod; 25. Telescopic slot; 26. Tooth plate; 27. Drive slot; 28. Limit rack; 29. ​​Multi-channel hydraulic rotary joint. DETAILED DESCRIPTION

[0030] The specific implementation methods of the present invention are described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific implementation methods.

[0031] Example 1

[0032] See also Figure 1-4 , the utility model provides a technical solution:

[0033] A synchronous lifting drive device includes a guide base 1, a synchronous lifting mechanism is installed on the guide base 1, the synchronous lifting mechanism includes a driving unit and a lifting unit, and the lifting unit is equipped with an adjustment component for adjusting the position of the lifting unit;

[0034] The driving unit includes a dual-axis motor 2, which is fixedly mounted on the guide seat 1, and the output shafts at both ends of the dual-axis motor 2 are respectively fixedly connected to the rotating shaft 3;

[0035] The lifting unit includes a power box 5, in which a driving bevel gear 41 and a driven bevel gear 42 are rotatably arranged. The driving bevel gear 41 is fixedly mounted on the rotating shaft 3, and the driving bevel gear 41 and the driven bevel gear 42 are meshed. The driven bevel gear 42 is connected to a linear push assembly.

[0036] In the above scheme, the synchronous jacking drive device utilizes a dual-axis motor 2, whose output shafts are connected to a rotating shaft 3 to drive the jacking unit. The jacking unit comprises a power box 5, which houses a driving bevel gear 41 and a driven bevel gear 42. The driving bevel gear 41 is fixed to the rotating shaft 3 and meshes with the driven bevel gear 42, which is connected to a linear propulsion assembly to achieve the jacking action. An adjustment assembly is used to adjust the position of the jacking unit to suit the jacking requirements of different bridge supports.

[0037] Furthermore, the linear pushing assembly includes a threaded rod 6, which coincides with the axis of the driven bevel gear 42 and is fixedly connected. The external thread of the threaded rod 6 is matched with a threaded sleeve 7. The upper part of the power box 5 is fixedly connected to a guide column 8, and the threaded sleeve 7 is slidably connected to the inside of the guide column 8.

[0038] In the above scheme, the linear propulsion assembly consists of a threaded rod 6 and a threaded sleeve 7. The threaded rod 6 is coaxially fixed to the driven bevel gear 42, and the threaded sleeve 7 is threadedly engaged with the threaded rod 6. A guide column 8 is fixed to the top of the power box 5. The threaded sleeve 7 slides within the guide column 8, converting rotational motion into linear lifting motion, thereby lifting the bridge beam.

[0039] Furthermore, a guide bar 9 is fixedly connected to the outside of the threaded sleeve 7, a limiting sliding groove is provided inside the guide column 8, and the guide bar 9 is slidably connected to the inside of the limiting sliding groove.

[0040] In the above scheme, a guide bar 9 is provided on the outside of the threaded sleeve 7, and a limiting groove is opened inside the guide column 8. The guide bar 9 slides in the groove to prevent the threaded sleeve 7 from rotating, ensuring the stability of the jacking process and avoiding jamming caused by unbalanced loading.

[0041] Furthermore, one end of the threaded sleeve 7 away from the power box 5 is fixedly connected to a top plate 10 , and a distance sensor 11 for monitoring lifting displacement is fixedly mounted on the top plate 10 .

[0042] In the above scheme, a top plate 10 is fixed to the top of the threaded sleeve 7, and a distance sensor 11 is installed on the top plate 10 to monitor the jacking height in real time, ensure the synchronization of each jacking point, and prevent the bridge structure from being damaged due to asynchronous jacking.

[0043] The overall operating principle of Example 1 is as follows: a dual-axis motor 2 is fixedly mounted on a guide base 1, and the output shafts at both ends drive the rotating shaft 3 to rotate synchronously. The rotating shaft 3 then drives the active bevel gear 41 in the power box 5 to rotate. The active bevel gear 41 meshes with the driven bevel gear 42, transmitting the rotational motion of the driven bevel gear 42 to the threaded rod 6 fixed coaxially therewith. The threaded rod 6 converts the rotational motion into linear lifting motion through the threaded engagement with the threaded sleeve 7. The guide bar 9 provided within the guide column 8 cooperates with the limiting slide groove to ensure that the threaded sleeve 7 moves linearly without rotation. The jacking operation of the bridge beam is achieved through the top plate 10 fixed to the top of the threaded sleeve 7. During the entire operation, a distance sensor 11 installed on the top plate 10 monitors the lifting displacement in real time to ensure that multiple jacking units maintain synchronous operation. Through mechanical transmission, this device effectively solves the technical problems of traditional hydraulic jacking systems, such as insufficient synchronization accuracy and slow response speed, and provides a reliable jacking solution for bridge maintenance projects.

[0044] Example 2

[0045] See also Figure 4-7 , and combined with Example 1, it is further obtained that the adjustment component includes a sliding seat 21, the sliding seat 21 is fixedly connected to the end of the power box 5 away from the guide column 8, and a guide rail 22 is radially opened on the guide seat 1. The sliding seat 21 is slidably connected to the inside of the guide rail 22, and the sliding seat 21 slides in the guide rail 22 to realize the lateral position adjustment of the jacking unit to adapt to the distribution of different bridge supports.

[0046] One side of the guide rail 22 is provided with linearly distributed teeth and grooves. A drive gear 23 is rotatably connected to the sliding seat 21. The side wall of the sliding seat 21 near the teeth and grooves is provided with a through slot, through which the drive gear 23 passes and engages with the teeth and grooves. A motor is fixedly connected to the sliding seat 21 to drive the drive gear 23. The drive gear 23 engages with the teeth and grooves, and the motor drives the power box 5 to move along the guide rail 22, achieving precise position adjustment of the lifting unit.

[0047] The adjustment assembly also includes a micro hydraulic telescopic rod 24, which is installed inside the active bevel gear 41. The active bevel gear 41 has a telescopic slot 25 at a position close to the rotating shaft 3. A toothed plate 26 is slidably connected inside the telescopic slot 25. The telescopic end of the micro hydraulic telescopic rod 24 is fixedly connected to the toothed plate 26. The micro hydraulic telescopic rod 24 pushes the toothed plate 26 to slide in the telescopic slot 25 under hydraulic drive.

[0048] A driving groove 27 is provided on the surface of the rotating shaft 3 along the axial direction. A linearly distributed limiting rack 28 is provided inside the driving groove 27 . The limiting rack 28 is provided perpendicular to the axial direction of the rotating shaft 3 , and the tooth plate 26 cooperates with the limiting rack 28 .

[0049] This adjustment assembly uses a miniature hydraulic telescopic rod 24 to control the engagement of the toothed plate 26 with the limiting rack 28, enabling rapid locking and release of the lifting unit. The miniature hydraulic telescopic rod 24 is mounted within the active bevel gear 41. To lock the lifting unit, the electrically operated telescopic rod pushes the toothed plate 26 outward along the telescopic slot 25, causing it to engage the limiting rack 28 within the drive slot 27 on the surface of the rotating shaft 3. This creates a rigid connection between the active bevel gear 41 and the rotating shaft 3, completely securing the position of the power box 5 and the entire lifting unit, ensuring stability during the lifting operation.

[0050] When the lifting unit needs to be adjusted, the micro-hydraulic telescopic rod 24 retracts, driving the toothed plate 26 off the limiting rack 28. The active bevel gear 41 is then unlocked from the rotating shaft 3. The drive gear 23 then drives the sliding seat 21 along the guide rail 22, achieving lateral position adjustment of the lifting unit. This design ensures secure locking during the lifting process while enabling rapid unlocking and position adjustment, resolving the technical challenge of conventional lifting devices that struggle to balance stability and flexibility.

[0051] The servo motor that drives the drive gear 23 is powered by a set of wear-resistant conductive rails installed inside the guide rail 22. The power supply system adopts a parallel dual-track layout with a spacing of 15mm between the positive and negative conductive rails. Flexible carbon brushes maintain continuous conductivity, allowing the motor to be powered uninterruptedly within a certain range of travel.

[0052] Furthermore, a multi-channel hydraulic rotary joint 29 is provided on one side of the active bevel gear 41 . The multi-channel hydraulic rotary joint 29 is used to transport oil to the micro hydraulic telescopic rod 24 inside the active bevel gear 41 . The multi-channel hydraulic rotary joint 29 is installed inside the power box 5 .

[0053] In the above solution, a multi-channel hydraulic rotary joint 29 is provided on one side of the active bevel gear 41 for delivering hydraulic oil to the micro hydraulic telescopic rod 24 to ensure the stable movement of the tooth plate 26 without affecting the rotation of the gear.

[0054] Furthermore, multiple groups of lifting units are provided, and the multiple groups of lifting units are arranged along the guide rail 22 .

[0055] In the above technical solution, by setting up multiple groups of jacking units distributed along the guide rail 22 and synchronously driven by the same dual-axis motor 2, high-precision synchronous lifting of multiple support points in the bridge jacking project is achieved. Its working principle is as follows: the dual-axis motor 2 drives all the rotating shafts 3 to rotate synchronously, so that the bevel gear set of each jacking unit drives the threaded rod 6 mechanism at the same speed, thereby ensuring the synchronous movement of multiple groups of top plates 10; at the same time, the position of the jacking unit can be adjusted laterally through the adjustment component to adapt to different support spacings, and the structure can also achieve single-point independent control, which not only ensures overall synchronization but also retains local adjustment flexibility. This design effectively solves the problems of poor synchronization, insufficient adaptability and safety risks existing in traditional jacking methods, making bridge jacking operations more accurate and reliable. The synchronous jacking system of this solution is suitable for maintenance projects of large-span bridges, and significantly improves work efficiency and safety performance while ensuring construction accuracy.

[0056] The above disclosures are only a few specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A synchronous lifting drive device, comprising a guide seat (1), characterized in that: A synchronous lifting mechanism is installed on the guide seat (1), and the synchronous lifting mechanism comprises a driving unit and a lifting unit. The lifting unit is provided with an adjustment component, and the adjustment component is used to adjust the position of the lifting unit; The driving unit comprises a dual-axis motor (2), the dual-axis motor (2) is fixedly mounted on the guide seat (1), and the output shafts at both ends of the dual-axis motor (2) are respectively fixedly connected to the rotating shaft (3); The lifting unit includes a power box (5), wherein a driving bevel gear (41) and a driven bevel gear (42) are rotatably provided inside the power box (5), the driving bevel gear (41) is fixedly mounted on the rotating shaft (3), the driving bevel gear (41) and the driven bevel gear (42) are meshed, and the driven bevel gear (42) is connected to a linear push assembly.

2. A synchronous lifting drive device according to claim 1, characterized in that: The linear propulsion assembly includes a threaded rod (6), the threaded rod (6) and the driven bevel gear (42) are aligned and fixedly connected in axis, the threaded rod (6) is threadedly matched with a threaded sleeve rod (7) on the outside of the threaded rod (6), the upper part of the power box (5) is fixedly connected to a guide column (8), and the threaded sleeve rod (7) is slidably connected to the inside of the guide column (8).

3. A synchronous lifting drive device according to claim 2, characterized in that: A guide bar (9) is fixedly connected to the outside of the threaded sleeve (7), a limiting slide groove is provided inside the guide column (8), and the guide bar (9) is slidably connected to the inside of the limiting slide groove.

4. A synchronous lifting drive device according to claim 3, characterized in that: One end of the threaded sleeve rod (7) away from the power box (5) is fixedly connected to a top plate (10), and a distance sensor (11) for monitoring lifting displacement is fixedly mounted on the top plate (10).

5. The synchronous lifting drive device according to claim 1, characterized in that: The adjustment assembly includes a sliding seat (21), which is fixedly connected to an end of the power box (5) away from the guide column (8), and a guide rail (22) is radially opened on the guide seat (1), and the sliding seat (21) is slidably connected to the inside of the guide rail (22).

6. The synchronous lifting drive device according to claim 5, characterized in that: A linearly distributed tooth groove is provided on one side of the guide rail (22), a driving gear (23) is rotatably connected to the interior of the sliding seat (21), the driving gear (23) is engaged with the tooth groove, and a motor for driving the driving gear (23) to rotate is fixedly connected to the interior of the sliding seat (21).

7. The synchronous lifting drive device according to claim 6, characterized in that: The adjustment component also includes a micro hydraulic telescopic rod (24), which is installed inside the active bevel gear (41). The active bevel gear (41) is provided with a telescopic groove (25) at a position close to the rotating shaft (3), and a toothed plate (26) is slidably connected inside the telescopic groove (25).

8. The synchronous lifting drive device according to claim 7, characterized in that: A driving groove (27) is provided on the surface of the rotating shaft (3) along the axial direction. A linearly distributed limiting rack (28) is provided inside the driving groove (27). The limiting rack (28) is provided perpendicular to the axial direction of the rotating shaft (3). The tooth plate (26) cooperates with the limiting rack (28).

9. The synchronous lifting drive device according to claim 8, characterized in that: A multi-channel hydraulic rotary joint (29) is provided on one side of the active bevel gear (41). The multi-channel hydraulic rotary joint (29) is used to transport oil to the micro hydraulic telescopic rod (24) inside the active bevel gear (41). The multi-channel hydraulic rotary joint (29) is installed inside the power box (5).

10. The synchronous lifting drive device according to claim 9, characterized in that: There are multiple groups of lifting units, and the multiple groups of lifting units are arranged along the guide rail (22).

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