Steel cable management system for lifting mechanism

Abstract

The utility model discloses a steel cable management system for a lifting mechanism, which belongs to the technical field of hanging and lifting mechanisms and the like and comprises a horizontal winding shaft, a driving shaft and a drum wheel wound with a steel cable, and the end of the horizontal winding shaft and the end of the driving shaft are jointly connected with a sliding block shell. A tensioning pulley and a pressing wheel which are arranged at intervals in the vertical direction are arranged in the sliding block shell, the pressing wheel can move towards the tensioning pulley, the free end of the steel cable penetrates through the position between the tensioning pulley and the pressing wheel, the tensioning pulley and the pressing wheel are used for pressing the steel cable, and a pulling force is applied to the steel cable in the rolling-out direction of the steel cable, so that the steel cable is in a tensioning state when rolled in and rolled out. The steel cable winding device has the advantages that the steel cable can be easily wound out when no load is hung on the steel cable, the slider shell can smoothly slide on the driving shaft, the steel cable can be uniformly arranged in the spiral wire groove on the drum wheel, and the steel cable can be orderly arranged on the winding device and cannot be disorderly wound when being wound in / out.

Description

Technical Field

[0001] The utility model relates to the technical fields of hanging and lifting mechanisms, etc., and particularly relates to a steel cable management system for a lifting mechanism. Background Art

[0002] The lifting mechanism is installed and fixed on an aircraft and is used for lifting and lowering a certain weight load. One end of the steel cable of the lifting mechanism is wound around a winding device, and the other end is connected with a hook for connecting a heavy object. The hook is generally heavy and is used to provide tension for the steel cable to ensure that the steel cable can be normally wound in / wound out when not hanging a load.

[0003] However, for some usage scenarios, the hook of the steel cable is light or even not connected to the hook. At this time, the weight of only the steel cable interface is not enough to make the steel cable be normally wound in / wound out, and the steel cable will be disordered on the drum, which is easy to damage the steel cable or parts. Summary of the Utility Model

[0004] Aiming at the above-mentioned deficiencies of the prior art, the utility model provides a steel cable management system for a lifting mechanism, which can solve the problems occurring in the above usage scenarios, so that the winding in / winding out of the steel cable does not depend on the end of the steel cable connected with the heavy object, that is, the steel cable can be normally wound in / wound out whether or not it is connected with the heavy object, and it is ensured that the steel cable is arranged orderly on the winding device and will not be disordered when being wound in / wound out.

[0005] In order to achieve the above utility model purpose, the technical solution adopted by the utility model is as follows:

[0006] A steel cable management system for a lifting mechanism is provided, which includes a horizontal winding shaft, a driving shaft and a drum wound with a steel cable, which are arranged in parallel with each other. A driving device and a transmission device are arranged inside the drum. The driving device is used to drive the drum to rotate around its own axis. The transmission device includes a driving gear, and the driving gear is used to drive the horizontal winding shaft and the driving shaft to rotate in the same direction. A spiral wire groove for arranging the steel cable is arranged on the circumferential outer part of the drum, and the spiral wire groove extends towards the axis direction of the drum.

[0007] The axes of the horizontal winding shaft, the driving shaft and the drum are arranged in parallel. The ends of the horizontal winding shaft and the driving shaft are jointly connected with a slider housing, and the slider housing is threadedly connected with the end of the horizontal winding shaft. A tension pulley and a pressing wheel are arranged at intervals in the vertical direction inside the slider housing. One end of the driving shaft passes through the slider housing and is coaxially and slidably connected with the tension pulley. The pressing wheel can move towards the tension pulley, and the free end of the steel cable passes between the tension pulley and the pressing wheel. The tension pulley and the pressing wheel are used to press the steel cable.

[0008] The basic principle of the cable management system for the lifting mechanism in this solution is as follows: During use, the cable needs to be placed between the tension pulley and the pressure pulley, and the pressure pulley presses tightly on the cable. The cable is pressed tightly by the tension pulley and the pressure pulley, creating a static friction force between the cable and the tension pulley. When the tension pulley rotates clockwise, the static friction force will become a sliding friction force, which is a pulling force in the direction away from the drum, that is, a tension is generated on the cable. Therefore, as long as the linear velocity V1 of the tension pulley and the cable velocity V0 satisfy the following conditions, the tension of the cable will always exist. When the cable is unwound from the drum, the clockwise V1 is greater than V0; when the cable is wound into the drum, the counterclockwise V1 is less than V0. A pulling force is applied to the cable in the unwinding direction of the cable, ensuring that the cable is in a taut state during both winding and unwinding, and ensuring that the cable can be easily unwound even when there is no load hanging. This solves the problem in the prior art that the cable of the lifting mechanism cannot be straightened and unwound only by its own weight and move downward, thus not meeting some usage scenarios. At the same time, when the horizontal winding shaft rotates, it drives the slider housing and the cable inside it to displace along the axial direction of the horizontal winding shaft, ensuring that the cable is evenly arranged on the drum without getting disordered.

[0009] Further, a connecting shaft is provided at the central position of the pressure pulley; a strip-shaped installation groove is vertically provided on both sides inside the slider housing; both ends of the connecting shaft are slidably matched with the two strip-shaped installation grooves;

[0010] An adjusting member for adjusting the acting force between the pressure pulley and the tension pulley is provided on the slider housing. The adjusting member includes a pressing plate located inside the slider housing and on top of the pressure pulley. A connecting bolt is provided on the top of the pressing plate. The top of the connecting bolt passes through the slider housing and is located outside it. A locking nut is threadedly connected to the top of the connecting bolt. A fixed-torque spring is provided between the locking nut and the outer top surface of the slider housing.

[0011] To always maintain a certain value of cable tension, and the cable tension is the sliding friction force between the cable and the tension pulley when the tension pulley rotates. The factor affecting the friction force is the pressure provided by the pressure pulley, that is, the pressure of the locking nut pressing the fixed-torque spring. The fixed-torque spring can be a disc spring.

[0012] Further, a long-strip-shaped key groove is provided on the driving shaft along its length direction, and a connecting key slidably matched with the key groove is fixedly provided at the inner ring of the tension pulley.

[0013] Further, a threaded section is provided on one end of the horizontal winding shaft along its length direction. The end of the horizontal winding shaft is threadedly connected to the slider housing through the threaded section. When the horizontal winding shaft rotates, through the action of the threaded end, it can drive the slider housing and the cable inside it to move in the axial direction of the horizontal winding shaft, ensuring that the cable is evenly arranged in the spiral wire groove on the drum, and ensuring that the cable is arranged in an orderly manner on the winding device during winding / unwinding and will not get coiled up.

[0014] Further, the driving gear drives the horizontal winding shaft and the driving shaft to rotate in the same direction through a slipping clutch system, and the slipping clutch system includes a transmission shaft, an intermediate gear, a power gear, a first sprocket and a second sprocket;

[0015] A transmission gear and a slipping mechanism are arranged on the transmission shaft. The transmission gear meshes with the driving gear and drives the transmission shaft to rotate. The slipping mechanism includes a friction disc connected to the transmission shaft. A disc spring for pushing the friction disc is arranged on one side of the friction disc, and a third sprocket is arranged on the friction disc;

[0016] The power gear is fixedly connected to the horizontal winding shaft and meshes with the driving gear through the intermediate gear; the first sprocket and the second sprocket are respectively arranged on the horizontal winding shaft and the driving shaft;

[0017] The third sprocket, the first sprocket and the second sprocket are in transmission cooperation through a chain. Considering factors such as the diameter change of the steel cable, the performance difference of each fixed-torque spring, and the machining tolerance of the thread, the tightening torque value of the lock nut is within a certain range. When the tightening torque value of the lock nut exceeds this range, the frictional resistance increases, and the force transmitted by the transmission route to the tension pulley may be less than the frictional resistance between the tension pulley and the steel cable, resulting in the tension pulley being unable to rotate temporarily. At this time, if the transmission route cannot be immediately disconnected, the parts on the transmission route will be damaged, and the steel cable cannot be wound out. To avoid the above situation, a slipping mechanism is arranged on the transmission shaft, and the friction disc and the third sprocket are pressed tightly by a disc spring, so that there is a static friction force f between them. When the force F transmitted from the driving gear to the third sprocket through the transmission shaft and the transmission gear is less than the static friction force f, the friction disc and the third sprocket drive the chain together to drive the driving shaft. When F is greater than f, the friction disc and the third sprocket slip, the friction disc rotates while the large sprocket does not rotate, and thus the driving shaft cannot be driven to rotate through the chain, that is, the tension pulley does not rotate, playing a role in protecting the product structure.

[0018] The beneficial effects of the present utility model are as follows: In a cable management system for a lifting mechanism of the present utility model, by arranging a tension pulley and a pressure wheel inside the slider housing, a pulling force is applied to the cable in the direction of cable payout, so that the cable is in a tightened state both when being wound in and out, ensuring that the cable is evenly arranged on the drum without getting disordered, and also ensuring that the cable can be easily wound out even when there is no load hanging; at the same time, the horizontal winding shaft and the driving shaft jointly bear the pressure transmitted by the cable, and at the same time enable the slider housing to slide smoothly on the driving shaft, ensuring that the cable is evenly arranged in the spiral wire groove on the drum, and ensuring that the cable is arranged in an orderly manner on the winding device without getting coiled up when being wound in / wound out; furthermore, by setting a slipping clutch system, the transmission route can be automatically disconnected, playing a role in protecting the product structure. To sum up, a cable management system for a lifting mechanism in the present utility model solves the problem in the prior art that in a lifting mechanism, the cable cannot be straightened and wound out only by its own weight at the interface and move downward, thus unable to meet some usage scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 FIG. is a three-dimensional structural diagram of a cable management system for a lifting mechanism.

[0020] Figure 2 FIG. is a three-dimensional structural diagram of the cable management system with the drum omitted.

[0021] Figure 3 FIG. is a structural diagram of the slipping mechanism.

[0022] Wherein, 1. Horizontal winding shaft; 2. Driving shaft; 3. Cable; 4. Drum; 5. Driving gear; 6. Spiral wire groove; 7. Slider housing; 8. Tension pulley; 9. Pressure wheel; 10. Compression plate; 11. Connecting bolt; 12. Locking nut; 13. Fixed-torque spring; 14. Keyway; 15. Threaded section; 16. Transmission shaft; 17. Intermediate gear; 18. Power gear; 19. First sprocket; 20. Second sprocket; 21. Transmission gear; 22. Friction disc; 23. Disc spring; 24. Third sprocket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following describes the specific embodiments of the present utility model to facilitate those skilled in the art of the present technology to understand the present utility model. However, it should be clear that the present utility model is not limited to the scope of the specific embodiments. For those of ordinary skill in the art of the present technology, as long as various changes are within the spirit and scope of the present utility model defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present utility model are within the scope of protection.

[0024] As Figure 1As shown in the figure, the utility model provides a cable management system for a lifting mechanism, which includes a horizontal winding shaft 1, a driving shaft 2 and a drum 4 wound with a cable 3, which are arranged in parallel with each other. A driving device and a transmission device are arranged inside the drum 4. The driving device is used to drive the drum 4 to rotate around its own axis. The driving device can be a motor. The transmission device includes a driving gear 5. The transmission device can be a speed reducer. The input end of the speed reducer is connected to the output end of the motor, and the output end of the speed reducer is connected with the driving gear 5. The driving gear 5 is used to drive the horizontal winding shaft 1 and the driving shaft 2 to rotate in the same direction. A spiral wire groove 6 for arranging the cable 3 is arranged on the outer circumference of the drum 4, and the spiral wire groove 6 extends towards the axis direction of the drum 4.

[0025] The axes of the horizontal winding shaft 1, the driving shaft 2 and the drum 4 are arranged in parallel. Both ends of the horizontal winding shaft 1 and the driving shaft 2 are jointly connected with a slider housing 7. The slider housing 7 is threadedly connected to the end of the horizontal winding shaft 1. Specifically, a threaded section 15 is arranged on one end of the horizontal winding shaft 1 along its length direction, and the end of the horizontal winding shaft 1 is threadedly connected to the slider housing 7 through the threaded section 15. When the horizontal winding shaft 1 rotates, through the action of the threaded end, it can drive the slider housing 7 and the cable 3 inside it to move in the axial direction of the horizontal winding shaft 1, ensuring that the cable 3 is evenly arranged in the spiral wire groove 6 on the drum 4, and ensuring that the cable 3 is arranged in an orderly manner on the winding device when being wound in / wound out and will not be coiled up.

[0026] Tension pulleys 8 and pressure wheels 9 are arranged at intervals in the vertical direction inside the slider housing 7. One end of the driving shaft 2 passes through the slider housing 7 and is coaxially and slidably connected to the tension pulley 8. Specifically, a long-strip-shaped key groove 14 is arranged on the driving shaft 2 along its length direction, and a connecting key that is slidably matched with the key groove 14 is fixedly arranged at the inner ring of the tension pulley 8.

[0027] The pressure wheel 9 can move towards the tension pulley 8. The free end of the cable 3 passes through between the tension pulley 8 and the pressure wheel 9, and the tension pulley 8 and the pressure wheel 9 are used to press the cable 3.

[0028] During use, the steel cable 3 needs to be placed between the tension pulley 8 and the pressure wheel 9, and the pressure wheel 9 presses tightly on the steel cable 3. The steel cable 3 is pressed tightly by the tension pulley 8 and the pressure wheel 9, so that there is a static friction force between the steel cable 3 and the tension pulley 8. When the tension pulley 8 rotates clockwise, the static friction force will become a sliding friction force, and it is a pulling force in the direction away from the drum 4, that is, a tension is generated on the steel cable 3. Therefore, as long as the linear velocity V1 of the tension pulley 8 and the velocity V0 of the steel cable 3 satisfy the following conditions, the tension of the steel cable 3 will always exist. When the steel cable 3 is unrolled from the drum 4, the clockwise V1 is greater than V0; when the steel cable 3 is rolled into the drum 4, the counterclockwise V1 is less than V0. A pulling force is applied to the steel cable 3 in the unrolling direction of the steel cable 3, so that the steel cable 3 is in a tensioned state during both unrolling and rolling, ensuring that the steel cable 3 can be easily unrolled even when there is no load hanging. This solves the problem in the prior art that the steel cable 3 of the lifting mechanism cannot be straightened and unrolled only by its own weight and move downward, thus not meeting some usage scenarios. Specifically, the usage scenario is that two lifting mechanisms often need to be idly rolled in / rolled out simultaneously. Due to the application of the tensioning system, the steel cable 3 can be idly rolled in / rolled out autonomously, and there is no need for two people to hold the steel cable 3 under the lifting mechanism, liberating human resources. At the same time, when the horizontal winding shaft 1 rotates, it drives the slider housing 7 and the steel cable 3 inside it to displace along the axial direction of the horizontal winding shaft 1, ensuring that the steel cable 3 is evenly arranged on the drum 4 without getting disordered.

[0029] Specifically, as an implementation manner in which the pressure wheel 9 is movable, a connecting shaft is provided at the central position of the pressure wheel 9; a strip-shaped installation groove is vertically provided on both sides inside the slider housing 7; both ends of the connecting shaft are slidably matched with the two strip-shaped installation grooves. Preferably, an adjusting member for adjusting the acting force between the pressure wheel 9 and the tension pulley 8 is provided on the slider housing 7. The adjusting member includes a pressing plate 10 located inside the slider housing 7 and on top of the pressure wheel 9. A connecting bolt 11 is provided at the top of the pressing plate 10. The top of the connecting bolt 11 passes through the slider housing 7 and is located outside it. A locking nut 12 is threadedly connected to the top of the connecting bolt 11. A constant-torque spring 13 is provided between the locking nut 12 and the outer top surface of the slider housing 7. To always maintain a certain value of tension of the steel cable 3, and the tension of the steel cable 3 is the sliding friction force between the tension pulley 8 and the steel cable 3 during rotation. The factor affecting the friction force is the pressure provided by the pressure wheel 9, that is, the pressure of the locking nut 12 pressing the constant-torque spring 13. The constant-torque spring 13 can be a disc spring 23.

[0030] As Figures 1 to 3 shown, further, the driving gear 5 drives the horizontal winding shaft 1 and the driving shaft 2 to rotate in the same direction through a slipping clutch system. The slipping clutch system includes a transmission shaft 16, an intermediate gear 17, a power gear 18, a first sprocket 19 and a second sprocket 20.

[0031] A transmission gear 21 and a slipping mechanism are provided on a transmission shaft 16. The transmission gear 21 meshes with a driving gear 5 and drives the transmission shaft 16 to rotate. The slipping mechanism includes a friction disc 22 connected to the transmission shaft 16. A disc spring 23 for pushing the friction disc 22 is provided on one side of the friction disc 22. A third sprocket 24 is provided on the friction disc 22.

[0032] A power gear 18 is fixedly connected to a horizontal winding shaft 1 and meshes with the driving gear 5 through an intermediate gear 17. A first sprocket 19 and a second sprocket 20 are respectively provided on the horizontal winding shaft 1 and a driving shaft 2.

[0033] The third sprocket 24, the first sprocket 19 and the second sprocket 20 are in transmission cooperation through a chain. Considering factors such as the diameter change of the steel cable 3, the performance difference of each fixed-torque spring 13, and the machining tolerance of the thread, the tightening torque value of the locking nut 12 is within a range. When the tightening torque value of the locking nut 12 exceeds this range, the frictional resistance increases, and the force transmitted by the transmission route to the tension pulley 8 may be less than the frictional resistance between the tension pulley 8 and the steel cable 3, resulting in the temporary inability of the tension pulley 8 to rotate. At this time, if the transmission route cannot be immediately disconnected, the parts on the transmission route will be damaged, and the steel cable 3 cannot be unwound. To avoid the above situation, a slipping mechanism is provided on the transmission shaft 16, and the friction disc 22 and the third sprocket 24 are pressed tightly by the disc spring 23, so that there is a static friction force f between them. When the force F transmitted from the driving gear 5 to the third sprocket 24 through the transmission shaft 16 and the transmission gear 21 is less than the static friction force f, the friction disc 22 and the third sprocket 24 drive the chain together to drive the driving shaft 2. When F is greater than f, the friction disc 22 slips with the third sprocket 24, the friction disc 22 rotates while the large sprocket does not rotate, and thus the driving shaft 2 cannot be driven to rotate through the chain, that is, the tension pulley 8 does not rotate, playing a role in protecting the product structure.

[0034] In summary, in a steel cable management system for a lifting mechanism in the present utility model, by providing a tension pulley 8 and a pressure wheel 9 in a slider housing 7, a pulling force is applied to the steel cable 3 in the unwinding direction of the steel cable 3, so that the steel cable 3 is in a tensioned state when being wound and unwound, ensuring that the steel cable 3 is evenly arranged on the drum 4 without disorder, and also ensuring that the steel cable 3 can be easily unwound when not carrying a load; at the same time, the horizontal winding shaft 1 and the driving shaft 2 jointly bear the pressure transmitted by the steel cable 3, and at the same time enable the slider housing 7 to slide smoothly on the driving shaft 2, ensuring that the steel cable 3 is evenly arranged in the spiral wire groove 6 on the drum 4, and ensuring that the steel cable 3 is arranged in an orderly manner on the winding device when being wound / unwound without being coiled disorderly; furthermore, by providing a slipping clutch system, the transmission route can be automatically disconnected, playing a role in protecting the product structure.

Claims

1. A wire rope management system for a lifting mechanism, characterized in that: It comprises a horizontal winding shaft, a driving shaft and a drum wheel with a steel cable wound thereon, which are arranged in parallel with each other. A driving device and a transmission device are arranged inside the drum wheel. The driving device is used to drive the drum wheel to rotate around its own axis. The transmission device comprises a driving gear, which is used to drive the horizontal winding shaft and the driving shaft to rotate in the same direction. A spiral groove for arranging the steel cable is arranged on the outer circumference of the drum wheel, and the spiral groove extends toward the axis direction of the drum wheel. The ends of the horizontal winding shaft and the driving shaft are commonly connected to a slider housing, and the slider housing is threadedly connected to the end of the horizontal winding shaft; a tensioning pulley and a pressure wheel arranged at intervals in the vertical direction are provided in the slider housing, and one end of the driving shaft passes through the slider housing and is coaxially slidably connected to the tensioning pulley; the pressure wheel can move toward the tensioning pulley, and the free end of the steel cable passes between the tensioning pulley and the pressure wheel, and the tensioning pulley and the pressure wheel are used to compress the steel cable.

2. The wire rope management system for a lifting mechanism according to claim 1, characterized in that: A connecting shaft is provided at the center of the pressure wheel; a strip-shaped mounting groove is vertically provided on both sides of the inside of the slider housing; and both ends of the connecting shaft are respectively slidably matched with the two strip-shaped mounting grooves; The slider housing is provided with an adjusting member for adjusting the force between the pressure wheel and the tensioning pulley, and the adjusting member includes a clamping plate located inside the slider housing and on the top of the pressure wheel, a connecting bolt is provided on the top of the clamping plate, the top of the connecting bolt passes through the slider housing and is located outside the slider housing, a locking nut is threadedly connected to the top of the connecting bolt, and a torsion spring is provided between the locking nut and the top surface of the outside of the slider housing.

3. The wire rope management system for a lifting mechanism according to claim 2, characterized in that: The driving shaft is provided with a keyway of a long strip structure along its length direction, and a connecting key which is slidably matched with the keyway is fixedly provided on the inner ring of the tensioning pulley.

4. The wire rope management system for a lifting mechanism according to claim 3, characterized in that: One end of the horizontal winding shaft is provided with a threaded section along its length direction, and the end of the horizontal winding shaft is threadedly connected with the slider housing through the threaded section.

5. The wire rope management system for a lifting mechanism according to claim 4, characterized in that: The driving gear drives the horizontal winding shaft and the driving shaft to rotate in the same direction through a slip clutch system, and the slip clutch system includes a transmission shaft, a transition gear, a power gear, a first sprocket and a second sprocket; The transmission shaft is provided with a transmission gear and a slipping mechanism, the transmission gear meshes with the driving gear and drives the transmission shaft to rotate; the slipping mechanism includes a friction disk connected to the transmission shaft, a butterfly spring for pushing the friction disk is provided on one side of the friction disk, and a third sprocket is provided on the friction disk; The power gear is fixedly connected to the horizontal winding shaft and meshes with the driving gear through the transition gear; the first sprocket and the second sprocket are respectively arranged on the horizontal winding shaft and the driving shaft; The third sprocket, the first sprocket and the second sprocket are matched with each other through chain transmission.

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