Mechanism for lifting load of airborne hanger

Abstract

The invention discloses a mechanism for lifting a load through an airborne hanger, and belongs to the technical field of hanging equipment, the mechanism for lifting the load through the airborne hanger comprises a mounting rack, the mounting rack is provided with a first drum wheel, a second drum wheel and a steel cable automatic winding and unwinding mechanism, and the first drum wheel and the second drum wheel are connected through a speed reducer; the automatic steel cable winding and unwinding mechanism comprises a driving shaft, a horizontal winding shaft and a slip clutch system; the end of the driving shaft and the end of the horizontal winding shaft are jointly connected with a sliding block, and a tensioning pulley and a pressing wheel are arranged in the sliding block. The slip clutch system can automatically disconnect a transmission line to play a role in protecting the product structure; the tensioning pulley and the pressing wheel generate tension on the steel cable, so that the steel cable is in a tensioning state when being rolled in and rolled out, and the steel cable can be easily rolled out when no load is hung on the steel cable. The problem that an existing hanging device cannot meet some use scenes due to the fact that a rolled-out steel cable cannot be straightened only by means of the self weight of a connector and cannot move downwards is solved.

Description

Technical Field

[0001] The invention relates to the technical fields of suspension and lifting mechanisms, and in particular to a mechanism for lifting loads on an airborne suspension. Background Art

[0002] As a tool for lifting heavy objects, the suspension generally adopts the structure of high-speed low-torque motor + planetary gear reducer to ensure work efficiency. Since the suspension is required to stay at any position during the process of lifting heavy objects, an electromagnetic brake is generally added to the rear of the motor to achieve this function. The suspension in the prior art generally adopts the structure of high-speed low-torque motor + planetary gear reducer + electromagnetic brake, but due to volume and weight restrictions, as well as test feedback, the electromagnetic brake is prone to failure during long-term use, and the reliability is low. After power is restored, there is a situation where the electromagnetic brake and reducer cannot be disengaged immediately, making it impossible to continue the lifting of heavy objects. At the same time, when the suspension in the prior art is unloaded, the weight of the interface connecting the steel cable to the heavy object is relatively small, which is not enough for the steel cable to straighten the rolled steel cable and move downward by the weight of the interface alone, and cannot meet the unloaded use scenario. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, the present invention provides a mechanism for airborne suspension load lifting, which solves the problems in the prior art of unstable suspension brake function and failure of the steel cable to be automatically released when unloaded.

[0004] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is:

[0005] Provided is a mechanism for airborne suspension and load lifting, comprising a mounting frame, a first drum wheel and a second drum wheel which are symmetrically arranged horizontally at intervals on the mounting frame and are wound with steel cables, a reducer is arranged inside the first drum wheel, and a driving motor is arranged inside the second drum wheel; a power output end of the reducer is connected to the first drum wheel and the second drum wheel respectively, and a power input end of the reducer is connected to the driving motor; the driving motor drives the first drum wheel and the second drum wheel to rotate at the same speed and in the same direction through the reducer;

[0006] A steel cable autonomous retraction and release mechanism connected to the mounting frame is provided on one side of the first drum and the second drum, and the steel cable autonomous retraction and release mechanism includes a driving shaft, a horizontal winding shaft and a slip clutch system; the driving shaft and the horizontal winding shaft are arranged in parallel and a slider assembly is commonly connected to both ends of the two, the first drum and the second drum are respectively matched with a slider assembly, each slider assembly includes a slider, the slider is threadedly connected to the end of the horizontal winding shaft, and the slider is slidingly connected to the end of the driving shaft; a tensioning pulley and a pressure wheel assembly are provided in the slider, and the end of the driving shaft passes through the slider and is coaxially slidably connected to the tensioning pulley; the pressure wheel assembly includes a pressure wheel arranged on the top of the tensioning pulley and an adjusting member for adjusting the position of the pressure wheel, 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 press the steel cable; the slip clutch system is connected to the driving gear on the reducer and drives the driving shaft and the horizontal winding shaft to rotate in the same direction.

[0007] The basic principle of the mechanism for airborne suspension and load lifting in this scheme is: when in use, the steel cable needs to be placed between the tension pulley and the pressure wheel, and the pressure wheel is used to press the steel cable through the adjustment member. The steel cable is pressed by the tension pulley and the pressure wheel, so that there is static friction between the steel cable and the tension pulley. When the tension pulley rotates clockwise, the static friction will become sliding friction, and it is a pulling force away from the drum, that is, a tension is generated on the steel cable. Therefore, as long as the linear velocity V1 of the tension pulley and the steel cable velocity V0 meet the following conditions, the tension of the steel cable will always exist. Start the drive motor, and drive the first drum and the second drum to rotate at the same speed and in the same direction through the reducer. When the steel cable is rolled out from the first drum and the second drum, the clockwise V1 is greater than V0; when the steel cable is rolled into the first drum and the second drum, the counterclockwise V1 is less than V0, and a pulling force is applied to the steel cable in the rolling-out direction, so that the steel cable is in a tensioned state when rolling in and out, ensuring that the steel cable can be easily rolled out without hanging a load. At the same time, when the horizontal winding shaft rotates, the slider and the steel cable inside it are driven to move along the axial direction of the horizontal winding shaft, ensuring that the steel cable is evenly arranged on the first drum and the second drum. The reducer adopts an internal meshing planetary transmission, with a large transmission ratio range and a backstop characteristic, which not only makes the mechanism of the onboard hanging and lifting load have a stepless speed change characteristic, but also can control the hoisting speed by adjusting the speed of the drive motor, and when the power is cut off and the drive motor stops working, the reducer automatically "brakes" to ensure that the hoisted heavy object can be immediately stopped at any position. After power is turned on again, the lifting and lowering functions can be continued. The invention solves the problems in the prior art that the suspension brake function is unstable and the steel cable cannot be automatically released under no-load conditions.

[0008] Further, as a specific setting mode of the reducer, the reducer includes an eccentric shaft with a hollow structure, an inner spline is provided on the inner wall of one side of the eccentric shaft, and the output shaft of the driving motor is connected to the eccentric shaft through the inner spline;

[0009] A double external gear is rotatably connected to the eccentric shaft through a bearing, one end of the double external gear is arranged inside the fixed internal gear and meshes with the fixed internal gear, and the other end of the double external gear is arranged outside the fixed internal gear and meshes with the output internal gear. The eccentric shaft drives the double external gear to revolve around the axis of the fixed internal gear and the output internal gear. When the double external gear revolves around the fixed internal gear and the output internal gear, the double external gear rotates around its own axis.

[0010] A first drum wheel is arranged on the circumferential outer wall of the output internal gear, an end of the output internal gear protrudes out of the first drum wheel and is fixedly connected to the second drum wheel, and a driving gear is arranged on the circumferential outer wall of the end of the output internal gear;

[0011] The circumferential outer walls of the first drum and the second drum are both provided with spiral wire grooves arranged along their own length direction and used for winding the steel cable.

[0012] The working principle of the reducer is as follows: the speed and torque of the driving motor are input from the eccentric shaft, and the double external gear mounted on the eccentric shaft meshes with the fixed internal gear and the output internal gear respectively, wherein the fixed internal gear does not rotate, and when the double external gear revolves around the fixed internal gear and the output internal gear, the double external gear rotates around its own axis, and during the process of the double external gear revolving around the output internal gear, the speed and torque are transmitted to the output internal gear, so that the output internal gear rotates around its own axis to achieve the deceleration motion, and the rotating output internal gear drives the driving gear, the first drum wheel and the second drum wheel to rotate together, and the rotating first drum wheel and the second drum wheel drive the steel cable wound in the spiral groove to complete the lifting and lowering of the heavy object. The rotating driving gear transmits the speed and torque of the driving motor to the slip clutch system to realize the operation of the self-retracting and retracting mechanism of the steel cable.

[0013] Furthermore, a fixed bracket is arranged outside one side of the fixed internal gear, the fixed internal gear is located inside the first drum wheel, a needle bearing is arranged between the first drum wheel and the fixed internal gear, and the needle bearing is installed between the fixed internal gear and the first drum wheel to provide rigid support for the first drum wheel and vibration transmitted from the eccentric shaft; two eccentric connecting blocks are symmetrically arranged on the eccentric shaft, and the eccentric shaft is rotatably connected to the double external gear through bearings arranged on the two eccentric blocks. The arrangement of the two eccentric connecting blocks balances the overall weight of the eccentric shaft, so that its weight is evenly distributed on both sides of the eccentric shaft, so as to reduce the periodic vibration of the eccentric shaft when it rotates.

[0014] Furthermore, the reduction ratio between the eccentric shaft and the output internal gear is 183, and the efficiency coefficient of the internal gear meshing pair of the double external gear is 0.97-0.98. When the efficiency coefficient of the internal gear meshing pair of the reducer = 0.97 and the reduction ratio ≥ 33, the speed increase self-locking of the reducer is achieved. When the efficiency coefficient of the internal gear meshing pair of the reducer = 0.97 and the reduction ratio ≥ 49, the speed reduction self-locking of the reducer is achieved, so that the reducer has a backstop characteristic.

[0015] Furthermore, the pressure wheel is rotatably connected to the slider via a rotating shaft, and both ends of the rotating shaft cooperate with the slider via vertical strip mounting grooves; the adjusting member includes a pressure plate located inside the slider and located on the top of the pressure wheel, a connecting bolt is arranged on the top of the pressure plate, the top of the connecting bolt passes through the slider and is located outside it, a locking nut is threadedly connected to the top of the connecting bolt, and a fixed torsion spring is arranged between the locking nut and the outer top surface of the slider.

[0016] It is necessary to always maintain a certain value of cable tension on the steel cable. The cable tension is the sliding friction between the tensioning pulley and the steel cable when it rotates. The factor affecting the friction is the pressure provided by the clamping wheel, that is, the pressure of the locking nut compressing the fixed torsion spring. The fixed torsion spring can be a butterfly spring.

[0017] Furthermore, two ends of the horizontal winding shaft are respectively provided with two thread segments with opposite spiral directions, and the two sliders are respectively connected to the two ends of the horizontal winding shaft by threads through the two thread ends;

[0018] A keyway is provided at each end of the driving shaft, and both keyways are arranged along the length direction of the driving shaft; a connecting key that is slidably matched with the keyway is fixedly provided at the inner ring of each tensioning pulley.

[0019] Furthermore, a guide mechanism connected to the mounting frame is provided on one side of each slider, and each guide mechanism includes a fixed rod arranged parallel to the driving shaft, a guide pulley moving along its axis direction is slidably provided on the fixed rod, a guide shaft is provided on the top of the guide pulley, and the free end of the steel cable passes through the tension pulley and the pressure wheel and is located between the guide shaft and the guide pulley. The guide mechanism can be arranged at the position where the steel cable makes a 90-degree turn, and the guide mechanism is used to guide the steel cable and minimize the friction generated when the steel cable turns.

[0020] Furthermore, a cylindrical spring is provided on both sides of each guide pulley, and each cylindrical spring is sleeved on the fixed rod, one end of the cylindrical spring contacts the end of the fixed rod, and the other end contacts the side of the guide pulley. This ensures that the steel cable can translate synchronously with the slider along the axial direction, and considering that the steel cable is not in a straight state when it is rolled out from the drum, a bearing can be used to support the guide pulley, and two cylindrical springs are added on both sides of the guide pulley to prevent the guide pulley from translating too fast. When the entire mechanism for airborne suspension and load lifting is working, the steel cable is wound on the first drum and the second drum, and moves horizontally along its spiral groove as the slider rotates on the horizontal winding shaft and slides synchronously on the drive shaft. At the same time, the rolled-out steel cable drives the guide pulley to translate by the residual horizontal force of the winding direction on the drum spiral groove.

[0021] Further, the slip clutch system includes a transmission shaft, a transition gear, a power gear, a first sprocket and a second sprocket;

[0022] 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;

[0023] 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;

[0024] The third sprocket, the first sprocket and the second sprocket are matched with each other through chain transmission.

[0025] Considering the change in the diameter of the steel cable, the performance difference of each torsion spring, the processing tolerance of the thread and other factors, the tightening torque value of the locking nut is within a range. When the tightening torque value of the locking nut exceeds this range, the friction resistance increases, and the force transmitted to the tension pulley by the transmission route may be less than the friction resistance between the tension pulley and the steel cable, resulting in the tension pulley being temporarily unable to rotate. At this time, if the transmission route cannot be disconnected immediately, the parts on the transmission route will be damaged and the steel cable cannot be rolled out. In order to avoid the above situation, a slip mechanism is set on the transmission shaft, and the friction disc and the third sprocket are pressed by a butterfly spring so that there is a static friction force f between the two. When the force F transmitted to the third sprocket by the drive gear 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 to drive the drive shaft together. When F is greater than f, the friction disc and the third sprocket slip, the friction disc rotates but the large sprocket does not rotate, and then the drive shaft cannot be driven to rotate through the chain, that is, the tension pulley does not rotate, which plays a role in protecting the product structure.

[0026] Further, the rotational angular velocity of the horizontal winding shaft is the same as the rotational angular velocity of the first drum and the second drum.

[0027] The beneficial effects of the present invention are as follows: 1. A mechanism for airborne suspension and load lifting in the present invention, by setting a tension pulley and a pressure wheel to press the steel cable, creates static friction between the steel cable and the tension pulley. When the tension pulley rotates clockwise, the static friction will become a sliding friction, and it will be a pulling force away from the drum wheel, that is, a tension is generated on the steel cable, so that the steel cable is in a tensioned state when winding in and out, ensuring that the steel cable can be easily wound out even when no load is hung. This solves the problem in the prior art that the steel cable cannot be straightened and moved downward by the deadweight of the interface alone in the suspension equipment, and cannot meet some usage scenarios.

[0028] 2. The present invention provides a mechanism for lifting loads on an airborne suspension, which realizes the synchronous rotation of the first drum and the second drum by setting a driving motor and a reducer. The reducer adopts an internal meshing planetary transmission, has a large transmission ratio range, and has a non-return characteristic. It not only makes the mechanism for lifting loads on an airborne suspension have a stepless speed change characteristic, but also can control the lifting speed by adjusting the speed of the driving motor. Moreover, when the power is cut off and the driving motor stops working, the reducer automatically "brakes" to ensure that the suspended heavy objects can be stopped immediately at any position. After power is turned on again, the lifting and lowering functions can be continued. The problem of unstable suspension brake function in the prior art is solved.

[0029] 3. A mechanism for airborne suspension and load lifting in the present invention provides a horizontal winding shaft and a driving shaft. The horizontal winding shaft and the driving shaft jointly bear the pressure transmitted by the steel cable, and at the same time allow the slider to slide smoothly on the driving shaft and the horizontal winding shaft, ensuring that the steel cables are evenly arranged on the first drum and the second drum, and ensuring that the steel cables are arranged in order and not tangled when winding in / out.

[0030] 4. The mechanism for airborne suspension and load lifting in the present invention can automatically disconnect the transmission route by setting a slip clutch system, thereby protecting the product structure.

[0031] 5. The mechanism for airborne suspension and load lifting in the present invention is used to guide the steel cable by setting a guide mechanism, and to minimize the friction generated when the steel cable turns. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The figure is a three-dimensional structural schematic diagram of a mechanism for lifting loads by airborne suspension.

[0033] Figure 2 It is a schematic diagram of the coordination structure of the first drum, the reducer, the steel cable autonomous retraction and extension mechanism and the slip clutch system.

[0034] Figure 3 It is a schematic diagram of the coordinated structure of the steel cable autonomous retraction and extension mechanism and the slip clutch system.

[0035] Figure 4 It is a structural diagram of the sliding mechanism.

[0036] Figure 5 Schematic diagram of the structure of the guide mechanism.

[0037] Figure 6 Schematic diagram of the internal structure of the reducer.

[0038] Among them, 1. Mounting frame; 2. Steel cable; 3. First drum wheel; 4. Second drum wheel; 5. Speed ​​reducer; 6. Self-retracting and retracting mechanism of steel cable; 7. Driving shaft; 8. Horizontal winding shaft; 9. Slip clutch system; 10. Sliding block; 11. Tensioning pulley; 12. Pressure wheel; 13. Driving gear; 14. Eccentric shaft; 15. Internal spline; 16. Double external gear; 17. Fixed internal gear; 18. Output internal gear; 19. Spiral groove; 20. Fixed bracket; 21. Needle roller shaft Bearing; 22. Eccentric block; 23. Pressure plate; 24. Connecting bolt; 25. Locking nut; 26. Torsion spring; 27. Threaded section; 28. Keyway; 29. ​​Fixing rod; 30. Guide pulley; 31. Guide shaft; 32. Cylindrical spring; 33. Transmission shaft; 34. Transition gear; 35. Power gear; 36. First sprocket; 37. Second sprocket; 38. Transmission gear; 39. Friction disc; 40. Butterfly spring; 41. Third sprocket; 42. Guide mechanism. DETAILED DESCRIPTION

[0039] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0040] like Figure 1 to Figure 3 As shown, the present invention provides a mechanism for airborne hanging and lifting loads, comprising a mounting frame 1, a first drum wheel 3 and a second drum wheel 4 which are symmetrically arranged horizontally at intervals and wound with a steel cable 2 on the mounting frame 1, a reducer 5 is arranged inside the first drum wheel 3, and a driving motor is arranged inside the second drum wheel 4; the power output end of the reducer 5 is respectively connected to the first drum wheel 3 and the second drum wheel 4, and the power input end of the reducer 5 is connected to the driving motor; the driving motor drives the first drum wheel 3 and the second drum wheel 4 to rotate at the same speed and in the same direction through the reducer 5;

[0041] A steel cable self-retracting and releasing mechanism 6 connected to the mounting frame 1 is provided on one side of the first drum wheel 3 and the second drum wheel 4. The steel cable self-retracting and releasing mechanism 6 includes a driving shaft 7, a horizontal winding shaft 8 and a slip clutch system 9; the driving shaft 7 and the horizontal winding shaft 8 are arranged in parallel and a slider assembly is commonly connected to both ends of the two. The first drum wheel 3 and the second drum wheel 4 are matched with a slider assembly respectively, and each slider assembly includes a slider 10, which is threadedly connected to the end of the horizontal winding shaft 8, and the slider 10 is slidably connected to the end of the driving shaft 7; the slider The tensioning pulley 11 and the pinching wheel 12 assembly are arranged in the 10, and the end of the driving shaft 7 passes through the slider 10 and is coaxially slidably connected with the tensioning pulley 11; the pinching wheel 12 assembly includes a pinching wheel 12 arranged on the top of the tensioning pulley 11 and an adjusting member for adjusting the position of the pinching wheel 12, and the free end of the steel cable 2 passes between the tensioning pulley 11 and the pinching wheel 12, and the tensioning pulley 11 and the pinching wheel 12 are used to pinch the steel cable 2; the slip clutch system 9 is connected to the driving gear 13 on the reducer 5 and drives the driving shaft 7 and the horizontal winding shaft 8 to rotate in the same direction. The rotation angular velocity of the horizontal winding shaft 8 is the same as the rotation angular velocity of the first drum wheel 3 and the second drum wheel 4.

[0042] The basic principle of the mechanism for airborne suspension and load lifting in this scheme is: when in use, the steel cable 2 needs to be placed between the tensioning pulley 11 and the pressure wheel 12, and the pressure wheel 12 is used to press the steel cable 2 through the adjusting member. The steel cable 2 is pressed by the tensioning pulley 11 and the pressure wheel 12, so that there is static friction between the steel cable 2 and the tensioning pulley 11. When the tensioning pulley 11 rotates clockwise, the static friction will become a sliding friction, and it is a pulling force away from the drum, that is, a tension is generated on the steel cable 2. Therefore, as long as the linear velocity V1 of the tensioning pulley 11 and the speed V0 of the steel cable 2 meet the following conditions, the tension of the steel cable 2 will always exist. Start the drive motor, and drive the first drum 3 and the second drum 4 to rotate at the same speed and in the same direction through the reducer 5. When the steel cable 2 is unwound from the first drum 3 and the second drum 4, the clockwise V1 is greater than V0; when the steel cable 2 is wound into the first drum 3 and the second drum 4, the counterclockwise V1 is less than V0, and a pulling force is applied to the steel cable 2 in the unwinding direction of the steel cable 2, so that the steel cable 2 is in a tensioned state when winding in and out, ensuring that the steel cable 2 can be easily wound out even without a load. At the same time, when the horizontal winding shaft 8 rotates, the slider 10 and the steel cable 2 inside it are driven to move along the axial direction of the horizontal winding shaft 8, ensuring that the steel cable 2 is evenly arranged on the first drum 3 and the second drum 4. The reducer 5 adopts an internal meshing planetary transmission, with a large transmission ratio range and a non-return feature, which not only makes the onboard suspension load lifting mechanism have a stepless speed change feature, but also can control the load speed by adjusting the speed of the driving motor. Moreover, when the power is cut off and the driving motor stops working, the reducer 5 automatically "brakes" to ensure that the suspended heavy object can be stopped immediately at any position. After power is turned on again, the lifting and lowering functions can be continued. The problems of unstable suspension brake function and failure of the steel cable 2 to be automatically released under no-load conditions in the prior art are solved.

[0043] like Figure 1 , Figure 2 and Figure 6 As shown, as a specific arrangement of the reducer 5, the reducer 5 includes an eccentric shaft 14 with a hollow structure, an inner spline 15 is provided on the inner wall of one side of the eccentric shaft 14, and the output shaft of the driving motor is connected to the eccentric shaft 14 through the inner spline 15;

[0044] A double external gear 16 is rotatably connected to the eccentric shaft 14 through a bearing. One end of the double external gear 16 is disposed inside the fixed internal gear 17 and meshes with the fixed internal gear 17. The other end of the double external gear 16 is disposed outside the fixed internal gear 17 and meshes with the output internal gear 18. The eccentric shaft 14 drives the double external gear 16 to revolve around the axis of the fixed internal gear 17 and the output internal gear 18. When the double external gear 16 revolves around the fixed internal gear 17 and the output internal gear 18, the double external gear 16 rotates around its own axis.

[0045] The first drum wheel 3 is arranged on the circumferential outer wall of the output internal gear 18, the end of the output internal gear 18 protrudes outside the first drum wheel 3 and is fixedly connected to the second drum wheel 4, and the driving gear 13 is arranged on the circumferential outer wall of the end of the output internal gear 18;

[0046] The first drum 3 and the second drum 4 are both provided with spiral grooves 19 arranged along their own length direction and used for winding the steel cable 2 on their circumferential outer walls.

[0047] The working principle of the reducer 5 is as follows: the speed and torque of the driving motor are input from the eccentric shaft 14, and the double external gear 16 mounted on the eccentric shaft 14 meshes with the fixed internal gear 17 and the output internal gear 18 respectively, wherein the fixed internal gear 17 does not rotate, and when the double external gear 16 revolves around the fixed internal gear 17 and the output internal gear 18, the double external gear 16 rotates around its own axis, and during the process of the double external gear 16 revolving around the output internal gear 18, the speed and torque are transmitted to the output internal gear 18, so that the output internal gear 18 rotates around its own axis to achieve a deceleration motion, and the rotating output internal gear 18 drives the driving gear 13, the first drum wheel 3 and the second drum wheel 4 to rotate together, and the rotating first drum wheel 3 and the second drum wheel 4 drive the steel cable 2 wound in the spiral groove 19 to complete the lifting and lowering operation of the heavy object. The rotating driving gear 13 transmits the speed and torque of the driving motor to the slip clutch system 9, so as to realize the operation of the steel cable autonomous retracting and releasing mechanism 6.

[0048] Furthermore, a fixed bracket 20 is provided on the outside of one side of the fixed internal gear 17, the fixed internal gear 17 is located inside the first drum wheel 3, a needle bearing 21 is provided between the first drum wheel 3 and the fixed internal gear 17, and the needle bearing 21 is installed between the fixed internal gear 17 and the first drum wheel 3 to provide rigid support for the first drum wheel 3 and vibration transmitted from the eccentric shaft 14; two eccentric connecting blocks are symmetrically provided on the eccentric shaft 14, and the eccentric shaft 14 is rotatably connected to the double external gear 16 by bearings provided on the two eccentric blocks 22. The provision of the two eccentric connecting blocks balances the overall weight of the eccentric shaft 14, so that its weight is evenly distributed on both sides of the eccentric shaft 14, so as to reduce the periodic vibration of the eccentric shaft 14 when it rotates.

[0049] Furthermore, the reduction ratio between the eccentric shaft 14 and the output internal gear 18 is 183, and the efficiency coefficient of the internal gear meshing pair of the double external gear 16 is 0.97-0.98. When the efficiency coefficient of the internal gear meshing pair of the reducer 5 = 0.97, and the reduction ratio ≥ 33, the speed increase self-locking of the reducer 5 is achieved. When the efficiency coefficient of the internal gear meshing pair of the reducer 5 = 0.97, and the reduction ratio ≥ 49, the speed reduction self-locking of the reducer 5 is achieved, so that the reducer 5 has a backstop characteristic.

[0050] The reducer 5 in the present invention adopts an internal meshing planetary transmission, and has the characteristics of compact structure, large transmission ratio range, small size, reliable "braking", etc., which can well meet the actual needs of the hanging equipment.

[0051] like Figure 2 and Figure 3 As shown, the pressure wheel 12 is rotatably connected to the slider 10 through a rotating shaft, and both ends of the rotating shaft cooperate with the slider 10 through vertical strip mounting grooves; the adjusting member includes a pressure plate 23 located inside the slider 10 and at the top of the pressure wheel 12, and a connecting bolt 24 is arranged on the top of the pressure plate 23, and the top of the connecting bolt 24 passes through the slider 10 and is located outside it, and a locking nut 25 is threadedly connected to the top of the connecting bolt 24, and a fixed torsion spring 26 is arranged between the locking nut 25 and the outer top surface of the slider 10.

[0052] It is necessary to always maintain a certain value of tension in the steel cable 2, and the tension in the steel cable 2 is the sliding friction between the tensioning pulley 11 and the steel cable 2 when the tensioning pulley 11 rotates. The factor affecting the friction is the pressure provided by the clamping wheel 12, that is, the pressure of the locking nut 25 pressing the fixed torsion spring 26. The fixed torsion spring 26 can be a butterfly spring 40.

[0053] Furthermore, two ends of the horizontal winding shaft 8 are respectively provided with two thread segments 27 with opposite spiral directions, and the two sliders 10 are respectively threadedly connected to the two ends of the horizontal winding shaft 8 through the two thread ends;

[0054] A keyway 28 is respectively provided at both ends of the driving shaft 7 , and the two keyways 28 are both provided along the length direction of the driving shaft 7 ; a connecting key that slides with the keyway 28 is fixedly provided at the inner ring of each tensioning pulley 11 .

[0055] like Figure 1 and Figure 5 As shown, a guide mechanism 42 connected to the mounting frame 1 is provided on one side of each slider 10, and each guide mechanism 42 includes a fixed rod 29 arranged parallel to the driving shaft 7, a guide pulley 30 moving along its axial direction is slidably provided on the fixed rod 29, a guide shaft 31 is provided on the top of the guide pulley 30, and the free end of the steel cable 2 passes through the tension pulley 11 and the pressure wheel 12 and is located between the guide shaft 31 and the guide pulley 30. The guide mechanism 42 can be arranged at the position where the steel cable 2 makes a 90-degree turn, and the guide mechanism 42 is used to guide the steel cable 2 and minimize the friction generated when the steel cable 2 turns.

[0056] Furthermore, a cylindrical spring 32 is provided on both sides of each guide pulley 30, and each cylindrical spring 32 is sleeved on the fixed rod 29, one end of the cylindrical spring 32 contacts the end of the fixed rod 29, and the other end contacts the side of the guide pulley 30. It is ensured that the steel cable 2 can be synchronously translated along the axial direction with the slider 10, and considering that the steel cable 2 is not in a straight state when it is rolled out from the drum, the guide pulley 30 can be supported by a bearing, and two cylindrical springs 32 are added on both sides of the guide pulley 30 to prevent the guide pulley 30 from moving too fast. When the entire mechanism for hanging and lifting loads on the airborne is working, the steel cable 2 is wound on the first drum 3 and the second drum 4, and moves horizontally along its spiral groove 19 when the slider 10 rotates on the horizontal winding shaft 8 and slides synchronously on the driving shaft 7. At the same time, the rolled steel cable 2 drives the guide pulley 30 to move in translation by the residual horizontal force of the winding direction on the drum spiral groove.

[0057] like Figure 2 , Figure 3 and Figure 4 As shown, the slip clutch system 9 includes a transmission shaft 33, a transition gear 34, a power gear 35, a first sprocket 36 and a second sprocket 37; a transmission gear 38 and a slip mechanism are provided on the transmission shaft 33, the transmission gear 38 is meshed with the driving gear 13 and drives the transmission shaft 33 to rotate; the slip mechanism includes a friction disk 39 connected to the transmission shaft 33, a butterfly spring 40 is provided on one side of the friction disk 39 for pushing the friction disk 39, and a third sprocket 41 is provided on the friction disk 39; the power gear 35 is fixedly connected to the horizontal winding shaft 8 and meshed with the driving gear 13 through the transition gear 34; the first sprocket 36 and the second sprocket 37 are respectively arranged on the horizontal winding shaft 8 and the driving shaft 7; the third sprocket 41, the first sprocket 36 and the second sprocket 37 are matched through chain transmission.

[0058] Considering the change in the diameter of the steel cable 2, the performance difference of each torsion spring 26, the processing tolerance of the thread, etc., the tightening torque value of the locking nut 25 is within a range. When the tightening torque value of the locking nut 25 exceeds this range, the friction resistance increases, and the force transmitted to the tension pulley 11 by the transmission route may be less than the friction resistance between the tension pulley 11 and the steel cable 2, resulting in the tension pulley 11 temporarily unable to rotate. At this time, if the transmission route cannot be disconnected immediately, it will cause damage to the parts on the transmission route and the steel cable 2 cannot be rolled out. In order to avoid the above situation, a slip mechanism is set on the transmission shaft 33, and the butterfly spring 40 is used to press the friction disk 39 and the third sprocket 41, so that there is a static friction force f between the two. When the force F transmitted to the third sprocket 41 by the driving gear 13 through the transmission shaft 33 and the transmission gear 38 is less than the static friction force f, the friction disk 39 and the third sprocket 41 drive the chain to drive the driving shaft 7 together. When F is greater than f, the friction disc 39 and the third sprocket 41 slip, the friction disc 39 rotates but the large sprocket does not rotate, and thus the drive shaft 7 cannot be driven to rotate through the chain, that is, the tensioning pulley 11 does not rotate, thereby protecting the product structure.

Claims

1. A mechanism for lifting loads on an aircraft, characterized in that: It comprises a mounting frame, a first drum wheel and a second drum wheel are symmetrically arranged horizontally at intervals on the mounting frame and wound with a steel cable, a reducer is arranged inside the first drum wheel, and a driving motor is arranged inside the second drum wheel; the power output end of the reducer is respectively connected to the first drum wheel and the second drum wheel, and the power input end of the reducer is connected to the driving motor; The driving motor drives the first drum wheel and the second drum wheel to rotate at the same speed and in the same direction through the reducer; The first drum wheel and the second drum wheel are provided with a steel cable autonomous retraction and release mechanism connected to the mounting frame on one side, and the steel cable autonomous retraction and release mechanism includes a driving shaft, a horizontal winding shaft and a slip clutch system; the driving shaft and the horizontal winding shaft are arranged in parallel and both end portions of the two are commonly connected with a slider assembly, the first drum wheel and the second drum wheel are respectively matched with a slider assembly, and each slider assembly includes a slider, and the slider is threadedly connected to the end of the horizontal winding shaft, and the slider is slidingly connected to the end of the driving shaft; a tensioning pulley and a pressure wheel assembly are arranged in the slider, and the end of the driving shaft passes through the slider and is coaxially slidably connected to the tensioning pulley; the pressure wheel assembly includes a pressure wheel arranged on the top of the tensioning pulley and an adjusting member for adjusting the position of the pressure wheel, 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 press the steel cable; the slip clutch system is connected to the driving gear on the reducer and drives the driving shaft and the horizontal winding shaft to rotate in the same direction.

2. The mechanism for lifting loads on an aircraft according to claim 1, characterized in that: The reducer comprises an eccentric shaft with a hollow structure, an inner circumferential wall of one side of the eccentric shaft is provided with an internal spline, and the output shaft of the driving motor is connected to the eccentric shaft through the internal spline; A double external gear is rotatably connected to the eccentric shaft through a bearing, one end of the double external gear is arranged inside the fixed internal gear and meshes with the fixed internal gear, and the other end of the double external gear is arranged outside the fixed internal gear and meshes with the output internal gear. The eccentric shaft drives the double external gear to revolve around the axis of the fixed internal gear and the output internal gear. When the double external gear revolves around the fixed internal gear and the output internal gear, the double external gear rotates around its own axis. The first drum wheel is arranged on the circumferential outer wall of the output internal gear, the end of the output internal gear protrudes outside the first drum wheel and is fixedly connected to the second drum wheel, and the driving gear is arranged on the circumferential outer wall of the end of the output internal gear; The circumferential outer walls of the first drum and the second drum are both provided with spiral wire grooves arranged along their own length direction and used for winding the steel cable.

3. The mechanism for lifting loads on an aircraft according to claim 2, characterized in that: A fixed bracket is arranged on the outside of one side of the fixed internal gear, the fixed internal gear is located inside the first drum wheel, and a needle bearing is arranged between the first drum wheel and the fixed internal gear; two eccentric connecting blocks are symmetrically arranged on the eccentric shaft, and the eccentric shaft is rotatably connected to the double external gear through bearings arranged on the two eccentric blocks.

4. The mechanism for lifting loads on an aircraft according to claim 3, characterized in that: The reduction ratio between the eccentric shaft and the output internal gear is 183, and the efficiency coefficient of the internal tooth meshing pair of the double external gear is 0.97-0.

98.

5. The mechanism for lifting loads on an aircraft according to claim 1, characterized in that: The pressure wheel is rotatably connected to the slider via a rotating shaft, and both ends of the rotating shaft cooperate with the slider via vertical strip mounting grooves; the adjusting member includes a pressure plate located inside the slider and at the top of the pressure wheel, a connecting bolt is provided on the top of the pressure plate, the top of the connecting bolt passes through the slider and is located outside the slider, a locking nut is threadedly connected to the top of the connecting bolt, and a fixed torsion spring is provided between the locking nut and the outer top surface of the slider.

6. The mechanism for lifting loads on an aircraft according to claim 1, characterized in that: Two ends of the horizontal winding shaft are respectively provided with two thread segments with opposite spiral directions, and the two sliders are respectively threadedly connected to the two ends of the horizontal winding shaft through the two thread ends; A keyway is respectively arranged at both ends of the driving shaft, and the two keyways are arranged along the length direction of the driving shaft; a connecting key that slides with the keyway is fixedly arranged at the inner ring of each tensioning pulley.

7. The mechanism for lifting loads on an aircraft according to claim 1, characterized in that: A guide mechanism connected to the mounting frame is arranged on one side of each of the sliders, and each of the guide mechanisms includes a fixed rod arranged parallel to the driving shaft, a guide pulley moving along its axial direction is slidably arranged on the fixed rod, a guide shaft is arranged on the top of the guide pulley, and the free end of the steel cable passes through the tensioning pulley and the pressure wheel and is located between the guide shaft and the guide pulley.

8. The mechanism for lifting loads on an aircraft according to claim 7, characterized in that: A cylindrical spring is arranged on both sides of each guide pulley, and each cylindrical spring is sleeved on the fixing rod, one end of the cylindrical spring contacts the end of the fixing rod, and the other end contacts the side surface of the guide pulley.

9. The mechanism for lifting loads on an aircraft according to claim 1, characterized in that: 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 slip mechanism, the transmission gear meshes with the drive gear and drives the transmission shaft to rotate; the slip mechanism comprises 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.

10. The mechanism for lifting loads on an aircraft according to any one of claims 1 to 9, characterized in that: The horizontal winding shaft rotates at the same angular velocity as the first drum and the second drum.

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