Mode-switchable slewing damping mechanism for tower crane

Abstract

The application discloses a mode-switchable tower crane slewing damping mechanism, which comprises a boom connecting mechanism, a tower body connecting mechanism, a driving motor, a multi-gear transmission mechanism, a gear shifting mechanism and a controller. The boom connecting mechanism is rotationally connected with the tower body connecting mechanism. The multi-gear transmission mechanism is arranged between the boom connecting mechanism and the tower body connecting mechanism. The driving motor is connected with the multi-gear transmission mechanism. The gear shifting mechanism is connected with the multi-gear transmission mechanism. The controller is connected with the driving motor and the gear shifting mechanism. The damping function of the tower crane during operation is realized, and the vibration energy is recovered and stored, so that the operation safety of the tower crane under various weather conditions is ensured, and the safety of the crane can also be ensured in an emergency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transmission damping device, and particularly relates to a mode-switchable tower crane slewing damping mechanism. BACKGROUND

[0002] At present, the common slewing device is used in the tower crane, that is, the motor is connected with the slewing structure, the slewing structure drives the boom to rotate, and the brake is realized through the electromagnetic holding. The slewing device has many defects. For example, the boom of the tower crane will bear a large force in the case of strong wind, and fatigue damage will easily occur in long-term use. The same problem also exists in other types of cranes. Therefore, the present application proposes a slewing device to replace the original slewing device, aiming at solving these problems.

[0003] The gear damping slewing device can switch the mode of the motor in the slewing mechanism, reduce the force borne by the boom when the boom is parked, and improve the safety of the boom of the tower crane. SUMMARY

[0004] The present application solves the technical problem of the above-mentioned defects in the prior art, and provides a mode-switchable tower crane slewing damping mechanism, which realizes the damping function of the tower crane during operation, recovers the vibration energy for storage, and guarantees the operation safety of the tower crane under various weather conditions, and also ensures the safety of the crane in emergency situations.

[0005] The technical solution adopted by the present application to solve the above technical problems is as follows:

[0006] The mode-switchable tower crane slewing damping mechanism comprises a boom connecting mechanism, a tower body connecting mechanism, a driving motor, a multi-gear transmission mechanism, a gear shifting mechanism and a controller, the boom connecting mechanism is rotationally connected with the tower body connecting mechanism through a slewing bearing, the multi-gear transmission mechanism is arranged between the tower body connecting mechanism and the boom connecting mechanism, the driving motor is connected with the multi-gear transmission mechanism, the gear shifting mechanism is connected with the multi-gear transmission mechanism, and the controller is connected with the driving motor and the gear shifting mechanism; when the tower crane drives the boom to rotate, the controller controls the gear shifting mechanism to switch the multi-gear transmission mechanism to different gears, and switches between the driving mode and the energy recovery mode; when in the driving mode, the driving motor outputs the torque through the multi-gear transmission mechanism to drive the boom connecting mechanism to rotate relative to the tower body connecting mechanism, so that the slewing mechanism works normally; when in the energy recovery mode, the tower crane stops working, the wind drives the boom to rotate and vibrate relative to the tower body, drives the driving motor to generate electricity, reduces the force borne by the boom of the tower crane, absorbs the vibration of the tower crane, and recovers the wind-induced kinetic energy.

[0007] According to the technical scheme, the driving motor is arranged on the boom connecting mechanism, and the driving motor is connected with the tower connecting mechanism through the multi-gear transmission mechanism.

[0008] According to the technical scheme, the boom connecting mechanism comprises a rotary disc, the tower connecting mechanism comprises a base plate and a stand column, the lower end of the stand column is fixedly connected with the base plate, and the rotary disc is connected with the upper end of the stand column through a rotary bearing.

[0009] According to the technical scheme, the multi-gear transmission mechanism comprises a first transmission gear assembly, a second transmission gear assembly and a gear shifting gear, the first transmission assembly and the second transmission assembly are sequentially arranged between the output shaft of the driving motor and the tower connecting mechanism, the gear shifting gear is arranged between the first transmission assembly and the second transmission assembly, and the gear shifting gear is connected with a gear shifting mechanism; the transmission ratios of the first transmission gear assembly and the second transmission gear assembly are different, the gear shifting mechanism can adjust the transmission ratio between the motor and the boom connecting mechanism, and the mechanism is switched between the driving mode and the energy recovery mode.

[0010] According to the technical scheme, the gear shifting mechanism comprises a gear shifting motor, a control rod, a gear shifting sleeve and a lifting assembly, the gear shifting motor is arranged on the boom connecting mechanism, the gear shifting sleeve is sleeved on the gear shifting gear, one end of the control rod is connected with the gear shifting sleeve, the other end of the control rod is connected with the lifting assembly, and the lifting assembly is connected with the gear shifting motor.

[0011] According to the technical scheme, the lifting assembly comprises a worm gear and a worm, the worm is connected with the output shaft of the gear shifting motor, the worm gear is sleeved on the control rod, and the worm is engaged with the worm gear; the gear shifting motor drives the worm to rotate, the worm drives the worm gear to rotate and move back and forth along the length direction of the worm, the worm gear drives the gear shifting sleeve to move back and forth through the control rod, and the gear shifting gear is connected with the first transmission gear assembly or the second transmission gear assembly through the position switching of the gear shifting sleeve.

[0012] According to the technical scheme, the first transmission gear assembly comprises a first large gear and a first small gear, the first large gear is fixedly connected with the tower connecting mechanism, the first large gear is fixedly sleeved on the stand column and is welded with the stand column, and the first small gear is sleeved on the output shaft of the gear shifting motor; a synchronous gear is arranged on the side end face of the first small gear, and the synchronous gear is arranged on one side of the gear shifting gear or the gear shifting sleeve.

[0013] According to the technical scheme, the second transmission assembly comprises a second small gear and a second large gear, the second small gear is fixedly connected with the tower connecting mechanism, the second small gear is fixedly sleeved on the stand column and is welded with the stand column, and the second large gear is sleeved on the output shaft of the gear shifting motor; a synchronous gear is arranged on the side end face of the second large gear, and the synchronous gear is arranged on one side of the gear shifting gear or the gear shifting sleeve.

[0014] According to the above technical solution, when in energy recovery mode, the shift sleeve moves to the first gear and simultaneously meshes with the shift gear and the synchronization gear of the first pinion; when in drive mode, the shift sleeve moves to the second gear and simultaneously meshes with the shift gear and the synchronization gear of the second large gear.

[0015] The present invention has the following beneficial effects:

[0016] 1. This invention achieves basic vibration-damping slewing function through a shifting mechanism, drive motor, and controller. It can realize the vibration reduction function during tower crane operation and recover and store vibration energy to ensure the safety of tower crane operation under various weather conditions, and also ensure the safety of the crane in emergency situations. This invention uses the same motor as both the motor and generator, making the structure more compact and improving the space utilization of the vibration-damping slewing device.

[0017] 2. The present invention uses two sets of gears for transmission, which helps to ensure the safety of the tower crane when subjected to wind. Attached Figure Description

[0018] Figure 1 This is a perspective view of the mode-switchable tower crane slewing vibration damping mechanism in an embodiment of the present invention;

[0019] Figure 2 This is a front view of the mode-switchable tower crane slewing vibration damping mechanism in an embodiment of the present invention;

[0020] Figure 3 yes Figure 2 The right view;

[0021] Figure 4 This is a schematic diagram of the operation of the mode-switchable tower crane slewing vibration damping mechanism in an embodiment of the present invention;

[0022] In the diagram, 1-slewing bearing, 2-first large gear, 3-tower body connecting mechanism, 4-second small gear, 5-second large gear, 6-shifting gear, 7-control lever, 8-first small gear, 9-shifting motor, 10-boom connecting mechanism, 11-drive motor, 12-output shaft, 13-shifting sleeve, 14-worm gear, 15-worm, 16-boom, 17-tower body. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] Reference Figures 1-4As shown, the tower crane slewing vibration damping mechanism with switchable mode in Embodiment 1 of the present invention includes a boom connecting mechanism 10, a tower body connecting mechanism 3, a drive motor 11, a multi-gear transmission mechanism, a shifting mechanism, and a controller. The boom connecting mechanism 10 is rotatably connected to the tower body connecting mechanism 3 via a slewing bearing 1. The multi-gear transmission mechanism is disposed between the boom connecting mechanism 10 and the tower body connecting mechanism 3. The drive motor 11 is connected to the multi-gear transmission mechanism, the shifting mechanism is connected to the multi-gear transmission mechanism, and the controller is connected to the drive motor 11 and the shifting mechanism. When the tower crane... When the jib is driven to rotate, the controller controls the shifting mechanism to switch the multi-gear transmission mechanism to different gears, switching between drive mode and energy recovery mode. In drive mode, the output torque of the drive motor 11 drives the jib connecting mechanism 10 to rotate relative to the tower body connecting mechanism 3 through the multi-gear transmission mechanism, so that the slewing mechanism works normally. In energy recovery mode, the tower crane stops working, the wind blows the jib to rotate and vibrate relative to the tower body, driving the drive motor 11 to generate electricity, reducing the force on the tower crane jib, absorbing the tower crane vibration, and recovering wind-induced kinetic energy.

[0025] Furthermore, the drive motor 11 is mounted on the boom connection mechanism 10 and can function as both a motor and a generator in different modes. In drive mode, the drive motor 11 acts as a motor, driving the slewing mechanism to rotate; in energy recovery mode, the drive motor 11 acts as a generator, recovering energy generated by the boom's vibration under wind. The controller can switch the shifting mechanism and multi-gear transmission mechanism between drive mode and energy recovery mode according to the operating conditions, improving the motor's drive efficiency and power generation efficiency. Simultaneously, the controller can adjust the load on the drive motor 11 acting as a generator, controlling the back electromotive force torque of the drive motor 11, thereby adjusting the damping during relative rotation between the boom connection mechanism 10 and the tower connection mechanism 3.

[0026] The drive motor 11 is mounted on the boom connection mechanism 10, and the drive motor 11 is connected to the tower body connection mechanism 3 through a multi-gear transmission mechanism.

[0027] Furthermore, the boom connection mechanism 10 includes a turntable, and the tower body connection mechanism 3 includes a chassis and a column. The lower end of the column is fixedly connected to the chassis, and the turntable is connected to the upper end of the column through a slewing bearing 1.

[0028] Example 2

[0029] Based on Example 1, the specific structure of the multi-gear transmission mechanism is further defined, and the performance of Example 2 after the definition is better.

[0030] Furthermore, the multi-gear transmission mechanism includes a first transmission gear assembly, a second transmission gear assembly, and a shift gear 6. The first and second transmission assemblies are sequentially arranged between the output shaft of the drive motor and the tower body connection mechanism 3. The shift gear 6 is arranged between the first and second transmission assemblies and is connected to the shift mechanism. The transmission ratios of the first and second transmission gear assemblies are different. The shift mechanism can adjust the transmission ratio between the motor and the boom connection mechanism 10, enabling the mechanism to switch between drive mode and energy recovery mode.

[0031] Example 3

[0032] Based on Example 2, the specific structures of the shifting mechanism, the first transmission gear assembly, and the second transmission gear assembly are further defined, resulting in Example 3 having even better performance.

[0033] The shifting mechanism includes a shifting motor 9, a control lever 7, a shifting sleeve 13, and a lifting assembly. The shifting motor 9 is mounted on the boom connecting mechanism 10. The shifting sleeve 13 is sleeved on the shifting gear 6. One end of the control lever 7 is connected to the shifting sleeve 13, and the other end of the control lever 7 is connected to the lifting assembly. The lifting assembly is connected to the shifting motor 9.

[0034] Furthermore, the lifting assembly includes a worm gear 14 and a worm 15. The worm 15 is connected to the output shaft of the shift motor 9. The worm gear 14 is sleeved on the control lever 7, and the worm 15 meshes with the worm gear 14. The shift motor 9 drives the worm 15 to rotate, and the worm 15 drives the worm gear 14 to rotate, causing the worm gear 14 to move back and forth along the length of the worm 15. The worm gear 14 drives the shift sleeve 13 to move back and forth through the control lever 7. The shift gear 6 is connected to the first transmission gear set or the second transmission gear set by switching the position of the shift sleeve 13.

[0035] Furthermore, the first transmission gear assembly includes a first large gear 2 and a first small gear 8. The first large gear 2 is connected and fixed to the tower body connecting mechanism 3. The first large gear 2 is fixedly sleeved on the column and welded to the column. The first small gear 8 is sleeved on the output shaft of the drive motor. A synchronous gear is provided on the side end face of the first small gear 8. The synchronous gear is arranged on one side of the shift gear 6 or the shift sleeve 13.

[0036] Furthermore, the first pinion 8 is connected to the output shaft of the drive motor via a bearing, and its axial position is fixed to the output shaft of the drive motor via a bearing thrust.

[0037] Furthermore, the second transmission assembly includes a second pinion 4 and a second large gear 5. The second pinion 4 is connected and fixed to the tower body connecting mechanism 3. The second pinion 4 is fixedly sleeved on the column and welded to the column. The second large gear 5 is sleeved on the output shaft of the drive motor. A synchronous gear is provided on the side end face of the second large gear 5. The synchronous gear is arranged on one side of the shift gear 6 or the shift sleeve 13.

[0038] Furthermore, the second large gear 5 is connected to the output shaft of the drive motor via a bearing, and its axial position is fixed to the output shaft of the drive motor via a bearing thrust.

[0039] When the shift sleeve 13 moves to the first gear, the shift sleeve 13 simultaneously engages with the shift gear 6 and the synchronization gear of the first pinion 8. When the shift sleeve 13 moves to the second gear, the shift sleeve 13 simultaneously engages with the shift gear 6 and the synchronization gear of the second large gear 5.

[0040] The working principle of this invention: The slewing bearing 1 is bolted to the boom connecting mechanism 10 and the tower connecting mechanism 3. The first large gear 2 and the second small gear 4 are welded to the tower connecting mechanism 3 and mesh with the first small gear 8 and the second large gear 5, respectively. The second large gear 5 is a large gear with a synchronous gear welded on it, and the first small gear 8 is a small gear with a synchronous gear welded on it. The output shaft 12 is connected to the output shaft of the drive motor 11. The second large gear 5, the first small gear 8, and the shift gear 6 are mounted on the output shaft. The shift gear 6 is circumferentially fixed by its teeth, while the second large gear 5 and the first small gear 8 are axially fixed only by the bearing thrust. The shift sleeve 13 is fitted onto the shift gear 6, the control rod 7 is fitted onto the shift sleeve 13, the worm gear 14 is mounted on the control rod 7, and the worm 15 is mounted on the shift motor 9. The worm gear 14 meshes with the worm 15.

[0041] When the tower crane boom rotates, the controller drives the shift motor 9, so that the shift sleeve 13 is positioned between the shift gear 6 and the synchronous gear of the second large gear 5, causing the drive motor 11 to output low-speed, high-torque rotation, allowing the boom to rotate normally. When the tower crane stops working and the boom is subjected to strong winds, the controller drives the shift motor 9, so that the shift sleeve 13 is positioned between the shift gear 6 and the synchronous gear of the first small gear 8, amplifying the vibration of the tower crane boom under wind force, enabling the boom to slowly turn to the downwind direction, while recovering the kinetic energy of the boom from the wind.

[0042] The above are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent changes made in accordance with the claims of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A mode-switchable tower crane slewing vibration damping mechanism, characterized in that, It includes a boom connection mechanism, a tower body connection mechanism, a drive motor, a multi-gear transmission mechanism, a shifting mechanism, and a controller. The boom connection mechanism is rotatably connected to the tower body connection mechanism. The multi-gear transmission mechanism is located between the tower body connection mechanism and the boom connection mechanism. The drive motor is connected to the multi-gear transmission mechanism. The shifting mechanism is connected to the multi-gear transmission mechanism. The controller is connected to the drive motor and the shifting mechanism. The shifting mechanism includes a shifting motor, a control lever, a shifting sleeve, and a lifting assembly. The shifting motor is mounted on the boom connecting mechanism, the shifting sleeve is sleeved on the shifting gear, one end of the control lever is connected to the shifting sleeve, the other end of the control lever is connected to the lifting assembly, and the lifting assembly is connected to the shifting motor. The multi-gear transmission mechanism includes a first transmission gear assembly, a second transmission gear assembly, and a shift gear. The first transmission assembly and the second transmission assembly are sequentially arranged between the output shaft of the drive motor and the tower body connection mechanism. The shift gear is arranged between the first transmission assembly and the second transmission assembly and is connected to the shift mechanism. The first transmission gear assembly includes a first large gear and a first small gear. The first large gear is connected and fixed to the tower body connecting mechanism. The first small gear is sleeved on the output shaft of the drive motor. A synchronizing gear is provided on the side end face of the first small gear. The synchronizing gear is arranged on one side of the shift gear or shift sleeve. The second transmission component includes a second pinion and a second large gear. The second pinion is connected and fixed to the tower body connection mechanism. The second large gear is sleeved on the output shaft of the drive motor. A synchronizing gear is provided on the side end face of the second large gear. The synchronizing gear is arranged on one side of the shift gear or shift sleeve. When in energy recovery mode, the shift sleeve moves to the first gear, and simultaneously engages with the shift gear and the synchronous gear of the first pinion, amplifying the vibration of the tower crane boom when subjected to wind force, enabling the boom to slowly turn in the wind direction, while recovering the kinetic energy of the boom blown by the wind; when in drive mode, the shift sleeve moves to the second gear, and simultaneously engages with the shift gear and the synchronous gear of the second large gear, causing the drive motor to output low-speed, high-torque rotation, enabling the boom to rotate normally.

2. The mode-switchable tower crane slewing vibration damping mechanism according to claim 1, characterized in that, The drive motor is mounted on the boom connection mechanism and is connected to the tower body connection mechanism through a multi-gear transmission mechanism.

3. The mode-switchable tower crane slewing vibration damping mechanism according to claim 1, characterized in that, The boom connection mechanism includes a turntable, and the tower connection mechanism includes a base and a column. The lower end of the column is fixedly connected to the base, and the turntable is connected to the upper end of the column through a slewing bearing.

4. The mode-switchable tower crane slewing vibration damping mechanism according to claim 1, characterized in that, The first large gear is fixedly sleeved on the column and welded to the column. The second small gear is fixedly sleeved on the column and welded to the column.

5. The mode-switchable tower crane slewing vibration damping mechanism according to claim 1, characterized in that, The lifting assembly includes a worm gear and a worm. The worm is connected to the output shaft of the shift motor, and the worm gear is sleeved on the control rod, with the worm and worm gear meshing. The shift motor drives the worm to rotate, and the worm drives the worm wheel to rotate, causing the worm wheel to move back and forth along the length of the worm. The worm wheel drives the shift sleeve to move back and forth through the control rod. By switching the position of the shift sleeve, the shift gear is connected to the first transmission gear set or the second transmission gear set.

6. The mode-switchable tower crane slewing vibration damping mechanism according to claim 1, characterized in that, The first pinion is connected to the output shaft of the drive motor via a bearing, and its axial position with the output shaft of the drive motor is fixed; the second large gear is connected to the output shaft of the drive motor via a bearing, and its axial position with the output shaft of the drive motor is fixed.

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