Hanging device

Abstract

The present invention discloses a hanging device, which belongs to the technical field of lifting machinery and equipment, and includes a motor, a drum, a transmission mechanism located in the drum, and a rope wound on the drum; the motor includes a mounting portion arranged outside the drum and an output portion inserted into the drum, and the stator and rotor of the motor are both located in the output portion; a multi-stage planetary gear train is connected in sequence from the input end to the output end of the transmission mechanism; the planetary gear train located at the input end of the transmission mechanism includes a sun gear, a first planetary gear assembly, a fixed ring gear, and a first output ring gear; the sun gear is connected to the rotor of the motor; the fixed ring gear is fixed to the output portion; the inner ring of the first planetary gear assembly is meshed with the sun gear, and the inner ring of the first planetary gear assembly is meshed with the fixed ring gear and the first output ring gear respectively, and the first planetary gear assembly has X planetary gears; the number of teeth of the first output ring gear is N more than the number of teeth of the fixed ring gear, N=nX, and n is a positive integer.

Description

Technical Field

[0001] The invention belongs to the technical field of lifting machinery and equipment, and particularly relates to a hanging device. Background Art

[0002] Electric hoists are commonly used to lift heavy objects. In the existing technology, electric hoists are usually installed on a frame, with a large installation space and no restrictions on the structural size of the electric hoist. However, in some application scenarios, such as bomb hanging operations on aircraft, the space for installing electric hoists on the aircraft is limited, and existing electric hoists cannot meet this requirement. Summary of the Invention

[0003] In order to solve the technical problem in the prior art that electric hoists are too large to be installed in the reserved space on the aircraft, the present invention aims to provide a hanging device.

[0004] The technical solution adopted by the present invention is as follows: a hanging device includes a motor, a drum, a transmission mechanism located in the drum and a rope wound on the drum; the motor includes a mounting part provided outside the drum and an output part inserted into the drum, and the stator and rotor of the motor are both located in the output part; the output end of the transmission mechanism is connected to the drum, and the input end of the transmission mechanism is connected to the motor; a multi-stage planetary gear system is connected in sequence from the input end to the output end of the transmission mechanism; the planetary gear system located at the input end of the transmission mechanism includes a sun gear, a first planetary gear assembly, a fixed ring gear and a first output ring gear; the sun gear is connected to the rotor of the motor; the fixed ring gear is fixed to the output part; the inner ring of the first planetary gear assembly is meshed with the sun gear, and the inner ring of the first planetary gear assembly is meshed with the fixed ring gear and the first output ring gear respectively, and the first planetary gear assembly has X planetary gears; the number of teeth of the first output ring gear is N more than the number of teeth of the fixed ring gear, N=nX, and n is a positive integer.

[0005] As a further optional solution, the mounting portion includes a mounting plate and a manual rotating shaft rotatably supported on the mounting plate; the manual rotating shaft is parallel to the center axis of the reel; the rotor of the motor extends out of the mounting plate and is transmission-connected to the manual rotating shaft.

[0006] As a further optional solution, the planetary gear train located at the output end of the transmission mechanism includes a transmission shaft, a second planetary gear assembly and a second output ring gear; the transmission shaft extends from the center of the first output ring gear in a direction away from the motor, the transmission shaft is fixedly connected to the first output ring gear, and at least a portion of the transmission shaft is a gear shaft that meshes with the inner ring of the second planetary gear assembly; the outer ring of the first planetary gear assembly meshes with the second output ring gear; and the second output ring gear is fixed in the reel.

[0007] As a further optional solution, an end plate is provided on the outside of the drum away from the motor; the end plate has a sleeve extending into the interior of the drum; a first bearing is provided between the outer circle of the sleeve and the inner circle of the drum, and a second bearing is provided between the inner circle of the sleeve and the end of the transmission shaft away from the first output ring gear; the planetary carrier of the second planetary gear assembly is fixedly connected to the sleeve.

[0008] As a further optional solution, the fixed ring gear has an extension portion extending into the output portion; the outer circle of the extension portion is cooperatively connected with the output portion shaft hole; a third bearing is provided between the inner circle of the extension portion and the rotor of the motor, and the rotor of the motor and the sun gear are integrally formed.

[0009] As a further optional solution, a fourth bearing is provided between the output portion and the inner circle of the reel.

[0010] As a further optional solution, a spiral groove is provided on the outer surface of the drum, and the rope is wound in the spiral groove; the hanging device also includes a guide mechanism for guiding the rope; the guide mechanism includes a screw parallel to the central axis of the drum, a guide block threadedly connected to the screw, and a guide rod passing through the guide block; the guide rod is parallel to the screw; the screw is connected to the drum in a transmission manner, and the relationship between the lead a of the screw, the lead b of the spiral groove, and the transmission ratio i between the screw and the drum is: b=ai; the guide block is vertically provided with a through hole for the rope to pass through.

[0011] As a further optional solution, the hanging device also includes a clamping mechanism for pressing the rope into the spiral groove; the clamping mechanism includes multiple circular shafts distributed along the circumference of the drum; the circular shafts are parallel to the drum, and each circular shaft is sleeved with a pressure wheel; the outer cylindrical surface of the pressure wheel contacts the outer surface of the rope, and a one-way bearing is provided between the pressure wheel and the circular shaft; the circular shaft closest to the guide mechanism is connected to the drum for transmission, and the transmission ratio is greater than 1; when the rope is released, the one-way bearing is in a self-locking state; when the rope is collected, the one-way bearing is in a free rotation state.

[0012] As a further optional solution, the reel is sleeved with a driving gear; the screw and the circular shaft closest to the guide mechanism are sleeved with a first passive gear and a second passive gear respectively; the first passive gear and the second passive gear are both engaged with the driving gear.

[0013] As a further optional solution, travel sensors are provided on both sides of the guide block along its movement direction, and the travel sensors are used to send a signal when the guide block moves to an extreme position.

[0014] The beneficial effects of the present invention are: the output part of the motor is placed in the drum, the protruding size of the motor is minimized, thereby reducing the structural size of the entire suspension device, making it easy to install in the narrow space of the aircraft, the number of teeth of the output ring gear is greater than the number of teeth of the fixed ring gear, and the first planetary gear is meshed with the output ring gear by setting a reasonable displacement coefficient. Even when the motor occupies part of the space and causes the number of planetary gear trains to be reduced, a larger transmission ratio can still be achieved, ensuring that the suspension device has sufficient lifting weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a hanging device provided by an embodiment of the present invention.

[0016] Figure 2 yes Figure 1 A cross-sectional view of the center of the hanging device is shown.

[0017] Figure 3 yes Figure 1 The transmission diagram of the transmission mechanism in the hanging device shown.

[0018] Figure 4 yes Figure 1 Enlarged schematic diagram of area A in the middle.

[0019] Figure 5 yes Figure 1 Enlarged schematic diagram of area B in the middle.

[0020] Figure 6 yes Figure 1 Enlarged schematic diagram of area C in the middle.

[0021] In the figure: 1-motor; 2-drum; 3-rope; 4-mounting part; 5-output part; 6-stator; 7-rotor; 8-sun gear; 9-first planetary gear assembly; 10-first output ring gear; 11-fixed ring gear; 12-mounting plate; 13-manual shaft; 14-transmission shaft; 15-second planetary gear assembly; 16-second output ring gear; 17-end plate; 18-sleeve; 19-first bearing; 20-second bearing; 2 1-extension part; 22-third bearing; 23-fourth bearing; 24-screw; 25-guide rod; 26-guide block; 27-circular shaft; 28-one-way bearing; 29-driving gear; 30-first passive gear; 31-second passive gear; 32-stroke sensor; 33-bearing plate; 34-side plate; 35-connecting bar; 36-fixing rod; 37-first rocker arm; 38-second rocker arm; 39-torsion spring; 40-pressure wheel. DETAILED DESCRIPTION

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be briefly introduced below in combination with the drawings and the descriptions of the embodiments or the prior art. Obviously, the following descriptions of the structures of the drawings are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] The following will describe in detail the technical solutions provided by the present invention by way of examples with reference to the accompanying drawings. It should be noted that the description of these examples is intended to facilitate understanding of the present invention and does not constitute a limitation of the present invention. In some cases, some embodiments are not described or are not described in detail because they belong to existing or conventional technologies.

[0024] In addition, the technical features described herein, or the steps of all methods or processes disclosed herein, except for mutually exclusive features and / or steps, can also be combined in any suitable manner in one or more embodiments. For those skilled in the art, it is easy to understand that the order of steps or operations of the methods related to the embodiments provided herein can also be changed. Any order in the drawings and embodiments is for illustrative purposes only and does not imply a requirement to follow a certain order unless it is explicitly stated that a certain order is required.

[0025] The serial numbers assigned to components herein, such as "first" and "second," are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" in this application, where reasonable (and not self-contradictory), include both direct and indirect connections (couplings).

[0026] Figures 1 to 6 The invention shows a hanging device provided by an embodiment of the present invention, comprising a motor 1, a drum 2, a transmission mechanism located inside the drum 2, and a rope 3 wound around the drum 2; the motor 1 comprises a mounting portion 4 located outside the drum 2 and an output portion 5 inserted into the drum 2, with the stator 6 and the rotor 7 of the motor 1 both located inside the output portion 5; the output end of the transmission mechanism is connected to the drum 2, and the input end of the transmission mechanism is connected to the motor 1; a multi-stage planetary gear system is sequentially connected from the input end to the output end of the transmission mechanism; The planetary gear train includes a sun gear 8, a first planetary gear assembly 9, a fixed ring gear 11 and a first output ring gear 10; the sun gear 8 is connected to the rotor 7 of the motor 1; the fixed ring gear 11 is fixed to the output part 5; the inner ring of the first planetary gear assembly 9 is meshed with the sun gear 8, and the inner ring of the first planetary gear assembly 9 is meshed with the fixed ring gear 11 and the first output ring gear 10 respectively, and the first planetary gear assembly 9 has X planetary gears; the number of teeth of the first output ring gear 10 is N more than the number of teeth of the fixed ring gear 11, where N=nX, and n is a positive integer.

[0027] In this embodiment, the output unit 5 comprises a cylindrical housing, with the stator 6 secured to the inner wall of the housing and the rotor 7 positioned within the stator 6. The mounting structure of the stator 6, rotor 7, and housing in the motor 1 is well known to those skilled in the art and will not be further described here. The rotor 7 extends out of the housing toward one end of the transmission mechanism and connects to the transmission mechanism's input. Positioning the output unit 5 within the drum 2 prevents the motor 1 from occupying additional space outside the drum 2, thereby reducing the overall size of the suspension device and facilitating its installation within the confined space of an aircraft.

[0028] A bearing may be provided between the outer circle of one end of the housing close to the mounting portion 4 and the inner circle of the reel 2 so that the reel 2 can rotate smoothly relative to the housing.

[0029] The mounting portion 4 is used to secure the motor 1, or the motor 1 and the suspension device together, to the aircraft. The mounting portion 4 may include a rod-shaped member connected to the housing. For example, the outer circumference of the rod-shaped member is welded to the end of the housing facing away from the transmission mechanism. The central axis of the rod-shaped member is perpendicular to the central axis of the drum 2. Multiple rod-shaped members may be provided to ensure connection strength. In this embodiment, the mounting portion 4 may include a mounting plate 12 and a manual shaft 13 rotatably supported on the mounting plate 12; the manual shaft 13 is parallel to the central axis of the drum 2; the rotor 7 of the motor 1 extends out of the mounting plate 12 and is transmission-connected to the manual shaft 13. The plate surface of the mounting plate 12 is perpendicular to the central axis of the drum 2. The end surface of the mounting plate 12 facing the housing may be integrally formed with the housing or detachably connected by screws or the like.

[0030] The rotor 7 of the motor 1 and the manual rotating shaft 13 can be connected to each other through existing transmission mechanisms such as a chain transmission mechanism and a belt transmission mechanism; in this embodiment, a gear transmission mechanism is arranged between the rotor 7 of the motor 1 and the manual rotating shaft 13. Specifically, the rotor 7 extending out of the mounting plate 12 is coaxially fixed with a first gear, and the manual rotating shaft 13 is coaxially fixed with a second gear. A third gear is arranged between the first gear and the second gear, and the third gear is used for meshing the first gear and the second gear respectively. The third gear is rotatably supported on the mounting plate 12.

[0031] By providing the manual rotating shaft 13, manual operation can be achieved by rotating the manual rotating shaft 13. On this basis, one end of the manual rotating shaft 13 can have a non-circular cross-section, so that when manual operation is required, the end of the non-circular cross-section can be adjusted to a tool such as a socket 18 or a wrench to increase the lever arm and reduce the intensity of manual operation.

[0032] A multi-stage planetary gear system can be set inside the reel 2 to obtain a larger transmission ratio, thereby meeting the lifting force requirements of the hanging device. In this embodiment, since most of the motor 1 is inserted into the reel 2, it occupies part of the space inside the reel 2, which reduces the number of stages of the planetary gear system. In order to obtain a sufficiently large transmission ratio, the first output ring gear 10 is meshed outside the first planetary gear assembly 9, and the number of teeth of the first output ring gear 10 is greater than the number of teeth of the fixed ring gear 11. The first planetary gear assembly 9 does not transmit, but there is a virtual speed ratio. is the transmission ratio between the fixed ring gear 11 and the input gear, z b1 is the number of teeth of the fixed gear ring 11, z a is the number of teeth of the input gear. The number of teeth of the first output ring gear 10 is N more than the number of teeth of the fixed ring gear 11, where N is a multiple of the number of planetary gears in the first planetary gear assembly 9. By setting a reasonable modification coefficient, the first output ring gear 10 can be meshed with the first planetary gear. When the tooth profiles of the first output ring gear 10, the fixed ring gear 11, and the first planetary gear coincide, the first planetary gear simultaneously meshes with the first output ring gear 10 and the fixed ring gear 11. The farther away from the meshing point, the greater the difference in tooth profile overlap between the first output ring gear 10 and the fixed ring gear 11. Each time the planetary gears mesh, the first output ring gear 10 travels a distance further than the fixed ring gear 11. Finally, when the first output ring gear 10 rotates one circle, the first planetary carrier rotates ring, so the transmission ratio between the fixed ring gear 11 and the first output ring gear 10 is z b2 is the number of teeth of the first output ring gear 10, so the total reduction ratio of the planetary gear train at the input end is:

[0033]

[0034] For example, if the number of teeth on the input gear, the fixed ring gear 11, and the first output ring gear 10 are 13, 42, and 45, respectively, the number X of planetary gears in the first planetary gear assembly 9 is 3. At this point, the input-end planetary gear train speed ratio can reach 63.46. This reduces the number of planetary gear train stages while still achieving a high transmission ratio, meeting the lifting force requirements of the suspension device.

[0035] It is understandable that the number of teeth of the fixed ring gear 11 is less than that of the first output ring gear 10 , and the tooth width of the fixed ring gear 11 is greater than that of the first output ring gear 10 , so as to offset the difference caused by the number of teeth of the first output ring gear 10 being N more than that of the fixed ring gear 11 .

[0036] The first output ring gear 10 and the fixed ring gear 11 act together on the same tooth of the first planetary gear. When the first output ring gear 10 is subjected to torque, the force applied by the first output ring gear 10 to the planetary gear is transmitted to the fixed ring gear 11 along the first tangential direction. Since the fixed ring gear 11 is fixed, the force applied by the fixed ring gear 11 to the first planetary gear is equal to and opposite to the force applied by the first output ring gear 10 to the same planetary gear. Therefore, the torque acting on the first output ring gear 10 cannot be transmitted to the first planetary gear assembly 9, let alone the input gear. In other words, power can only be transmitted from the input gear to the first output ring gear 10, but cannot be transmitted from the first output ring gear 10 to the input gear, thereby realizing a backflow prevention function.

[0037] In this embodiment, a two-stage planetary gear train is provided in the transmission mechanism. Specifically, the planetary gear train located at the output end of the transmission mechanism includes a transmission shaft 14, a second planetary gear assembly 15 and a second output ring gear 16; the transmission shaft 14 extends from the center of the first output ring gear 10 in a direction away from the motor 1, and the transmission shaft 14 is fixedly connected to the first output ring gear 10. At least a portion of the transmission shaft 14 is a gear shaft that meshes with the inner ring of the second planetary gear assembly 15; the outer ring of the first planetary gear assembly 9 meshes with the second output ring gear 16; the second output ring gear 16 is fixed in the reel 2, and the second output ring gear 16 can be detachably connected to the reel 2 by screws or the like, and the second output ring gear 16 can also be integrally formed with the reel 2.

[0038] It should be noted that the first planetary gear assembly 9 and the second planetary gear assembly 15 are similar to or identical to the new gear assembly structure in the prior art, and will not be described in detail here.

[0039] In one embodiment, an end plate 17 is provided on the exterior of the end of the drum 2 away from the motor 1. The end plate 17 includes a sleeve 18 extending into the interior of the drum 2. A first bearing 19 is provided between the outer circumference of the sleeve 18 and the inner circumference of the drum 2. A second bearing 20 is provided between the inner circumference of the sleeve 18 and the end of the transmission shaft 14 away from the first output ring gear 10, thereby ensuring concentricity between the transmission shaft 14 and the drum 2. The planet carrier of the second planetary gear assembly 15 is fixedly connected to the sleeve 18. Furthermore, the fixed ring gear 11 includes an extension 21 extending into the output portion 5. The outer circumference of the extension 21 is matingly connected to the axial hole of the output portion 5. A third bearing 22 is provided between the inner circumference of the extension 21 and the rotor 7 of the motor 1. The rotor 7 of the motor 1 is integrally formed with the sun gear, thereby ensuring concentricity between the sun gear and the fixed ring gear 11. On this basis, a fourth bearing 23 is provided between the output part 5 and the inner circle of the reel 2, that is, the fourth bearing 23 is provided between the outer circle of one end of the shell close to the mounting plate 12 and the inner circle of the reel 2, thereby ensuring the concentricity between the sun gear, the fixed ring gear 11, the transmission shaft 14, the first output ring gear 10 and the second output ring gear 16.

[0040] In this embodiment, a bearing plate 33 is provided on the side of the mounting plate 12 facing away from the reel 2. The bearing plate 33 is fixed to the mounting plate 12 and is connected to the shaft hole of the mounting plate 12. The middle part of the bearing plate 33 extends into the shell to form a boss. The boss can be constructed in the form of a bearing seat, so that the two ends of the rotor 7 are supported by the bearing plate 33 and the fixed gear ring 11, and there is no need to provide additional bearings for supporting the rotor 7 in the shell, so as to reduce the structural size.

[0041] In this embodiment, the mounting plate 12 and the end plate 17 are connected together on the same side by a side plate 34, and are connected together on the other side of the mounting plate 12 and the end plate 17 by a connecting strip 35. The mounting plate 12, the end plate 17, the side plate 34 and the connecting strip 35 form a frame supporting the hanging device, and the structure is more stable.

[0042] In one embodiment, a spiral groove is provided on the outer surface of the drum 2, and the rope 3 is wound in the spiral groove; the hanging device also includes a guide mechanism for guiding the rope 3; the guide mechanism includes a screw 24 parallel to the central axis of the drum 2, a guide block 26 threadedly connected to the screw 24, and a guide rod 25 passing through the guide block 26; the guide rod 25 is parallel to the screw 24; the screw 24 is transmission-connected to the drum 2, and the relationship between the lead a of the screw 24, the lead b of the spiral groove, and the transmission ratio i between the screw 24 and the drum 2 is: b=ai; the guide block 26 is vertically provided with a through hole for the rope 3 to pass through.

[0043] According to actual needs, one or an even number of ropes 3 can be set. Setting an even number of ropes 3 makes the force of the hanging device more balanced. Specifically, a corresponding number of spiral grooves can be opened at both ends of the drum 2. For example, in this embodiment, two ropes 3 are set, and corresponding spiral grooves are opened at both ends of the drum 2. The rotation directions of the two spiral grooves are opposite, so that the parts of the two ropes 3 that lift the weights are simultaneously moved toward the middle of the drum 2, or the parts of the two ropes 3 that lift the weights are simultaneously moved away from the middle of the drum 2. Two corresponding guide blocks 26 are also set, and the screw rod 24 correspondingly includes a positive thread segment and a negative thread segment. For example, the one near the end plate 17 The spiral groove is a positive spiral. When the rotation direction of the screw 24 is the same as the rotation direction of the drum 2, the screw 24 close to the end plate 17 is a positive thread section. When the rotation direction of the screw 24 is opposite to the rotation direction of the drum 2, the screw 24 close to the end plate 17 is a reverse thread section; the spiral groove close to the mounting plate 12 is a reverse spiral. When the rotation direction of the screw 24 is the same as the rotation direction of the drum 2, the screw 24 close to the mounting plate 12 is a reverse thread section; when the rotation direction of the screw 24 is opposite to the rotation direction of the drum 2, the screw 24 close to the mounting plate 12 is a positive thread section; to ensure that the guide block 26 is consistent with the moving direction of the rope 3.

[0044] Since the relationship between the lead a of the screw 24, the lead b of the spiral groove, and the transmission ratio i between the screw 24 and the drum 2 is: b = ai, the moving speed of the guide block 26 is consistent with the speed of the rope 3 moving along the central axis of the drum 2, preventing the rope 3 from jumping the groove, etc. The speed of the screw 24 is w1, and the speed of the drum 2 is w2. w1×a=w2×b, so That is, b=ai.

[0045] In this embodiment, both ends of the screw rod 24 are rotatably supported by the end plate 17 and the mounting plate 12 , respectively, and both ends of the guide rod 25 are fixed to the end plate 17 and the mounting plate 12 , respectively.

[0046] In this embodiment, travel sensors 32 are provided on both sides of the guide block 26 along its direction of movement. The travel sensors 32 are configured to generate a signal when the guide block 26 reaches its limit position. The travel sensors 32 can be conventional travel sensors such as proximity sensors and limit switches. By providing the travel sensors 32, a signal is generated to the controller when the guide block 26 reaches its limit position, prompting the controller to stop or reverse the motor 1.

[0047] In one embodiment, the hanging device may also include a clamping mechanism for pressing the rope 3 into the spiral groove; the clamping mechanism includes a plurality of circular shafts 27 distributed along the circumference of the drum 2; the circular shafts 27 are all parallel to the drum 2, and each circular shaft 27 is sleeved with a pressure wheel 40; the outer cylindrical surface of the pressure wheel 40 abuts against the outer surface of the rope 3, and a one-way bearing 28 is provided between the pressure wheel 40 and the circular shaft 27; the circular shaft 27 closest to the guide mechanism is transmission-connected to the drum 2, and the transmission ratio is greater than 1; when the rope is released, the one-way bearing 28 is in a self-locking state; when the rope is collected, the one-way bearing 28 is in a free rotation state.

[0048] The two ends of the circular shaft 27 can be fixed to the end plate 17 and the mounting plate 12 respectively. At this time, the outer surface of the pressure wheel 40 can be made of soft materials such as rubber sleeves to compress the rope 3. In this embodiment, a fixing rod 36 is fixed between the end plate 17 and the mounting plate 12. Two circular shafts 27 are provided, namely the first circular shaft 27 and the second circular shaft 27. The two ends of the first circular shaft 27 are respectively provided with a first rocker arm 37; the two ends of the second circular shaft 27 are respectively provided with a second rocker arm 38; one end of the first rocker arm 37 is rotated around the first circular shaft 2 7, the other end of the first rocker arm 37 is rotatably sleeved outside the fixed rod 36; one end of the second rocker arm 38 is rotatably sleeved outside the second circular shaft 27, and the other end of the second rocker arm 38 is rotatably sleeved outside the fixed rod 36; a torsion spring 39 is provided between the first rocker arm 37 and the second rocker arm 38 located at the same end of the fixed rod 36, and the two arms of the torsion spring 39 respectively abut against the first rocker arm 37 and the second rocker arm 38, thereby driving the pressure wheel 40 of the first circular shaft 27 and the pressure wheel 40 of the second cylinder to press the rope 3 tightly through the torsion spring 39.

[0049] A transmission ratio greater than 1 means that the rotation speed of the circular shaft 27 is faster than the rotation speed of the drum 2. The one-way bearing 28 can be purchased directly from the market. Its specific structure and working principle are common knowledge in the field and will not be described in detail here. The inner ring of the one-way bearing 28 is sleeved on the outside of the circular shaft 27 and has an interference fit with the circular shaft 27; the pressure wheel 40 is sleeved on the outer ring of the one-way bearing 28 and has an interference or transition fit with the outer ring of the one-way bearing 28. In order to reduce the wear of the rope 3, the outer ring of the pressure wheel 40 is rubber. Specifically, the pressure wheel 40 includes a metal wheel sleeved on the outer ring of the one-way bearing 28 and a rubber wheel sleeved outside the metal wheel. The rubber wheel can have an interference fit with the metal wheel, or the rubber wheel can be fixed to the metal wheel by sintering.

[0050] When the rope 3 descends, the one-way bearing 28 self-locks, and the circular shaft 27 connected to the reel 2 transmits power to the pressure wheel 40. Since the transmission ratio is greater than 1, the rotation speed of the pressure wheel 40 is faster than the rotation speed of the reel 2. The pressure wheel 40 generates differential speed and dynamic friction relative to the rope 3, thereby tightening the rope 3 and assisting in feeding the rope 3; when the rope 3 rises, the one-way bearing 28 slips, that is, the one-way bearing 28 rotates freely, so that the power of the circular shaft 27 cannot be transmitted to the pressure wheel 40. Therefore, the pressure rotates with the reel 2, and the pressure wheel 40 has no differential speed relative to the rope 3, preventing the rope 3 from loosening.

[0051] The reel 2 and the circular shaft 27, as well as the reel 2 and the screw 24, can be connected by a conventional transmission mechanism such as a belt drive. In this embodiment, the reel 2 is sleeved with a driving gear 29; the screw 24 and the circular shaft 27 closest to the guide mechanism are sleeved with a first driven gear 30 and a second driven gear 31, respectively; the first driven gear 30 and the second driven gear 31 are both meshed with the driving gear 29. The driving gear 29 can be integrally formed with the reel 2.

[0052] The present invention is not limited to the above-mentioned optional implementation modes. Anyone can derive other forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, any technical solution that falls within the scope defined by the claims of the present invention falls within the scope of protection of the present invention.

Claims

1. A hanging device, characterized in that: The invention comprises a motor, a drum, a transmission mechanism located inside the drum and a rope wound on the drum; the motor comprises a mounting portion located outside the drum and an output portion inserted into the drum, and the stator and rotor of the motor are both located inside the output portion; the output end of the transmission mechanism is connected to the drum, and the input end of the transmission mechanism is connected to the motor; a multi-stage planetary gear system is sequentially connected from the input end of the transmission mechanism to the output end of the transmission mechanism; the planetary gear system located at the input end of the transmission mechanism comprises a sun gear, a first planetary gear assembly, a fixed gear ring and a first output gear ring; the sun gear is connected to the rotor of the motor; the fixed gear ring is fixed to the output portion; the inner ring of the first planetary gear assembly is meshed with the sun gear, and the inner ring of the first planetary gear assembly is respectively meshed with the fixed gear ring and the first output gear ring, and the first row The planetary gear assembly has X planetary gears; the number of teeth of the first output gear ring is N more than the number of teeth of the fixed gear ring, N=nX, n is a positive integer; the planetary gear train located at the output end of the transmission mechanism includes a transmission shaft, a second planetary gear assembly and a second output gear ring; the transmission shaft extends from the center of the first output gear ring in a direction away from the motor, the transmission shaft is fixedly connected to the first output gear ring, and at least a part of the transmission shaft is a gear shaft meshing with the inner ring of the second planetary gear assembly; the outer ring of the first planetary gear assembly meshes with the second output gear ring; the second output gear ring is fixed in the drum; an end plate is provided on the outside of the drum away from the motor; the end plate has a sleeve extending to the inside of the drum; a first bearing is provided between the outer circle of the sleeve and the inner circle of the drum, and the sleeve A second bearing is provided between the inner circle of the drum and the end of the transmission shaft away from the first output gear ring; the planet carrier of the second planetary gear assembly is fixedly connected to the sleeve; the fixed gear ring has an extension extending into the output part; the outer circle of the extension is matched with the shaft hole of the output part; a third bearing is provided between the inner circle of the extension and the rotor of the motor, and the rotor of the motor and the sun gear are integrally formed; a fourth bearing is provided between the output part and the inner circle of the drum; a spiral groove is provided on the outer circle of the drum, and the rope is wound in the spiral groove; the hanging device also includes a guide mechanism for guiding the rope; the guide mechanism includes a screw parallel to the central axis of the drum, a guide block threadedly connected to the screw and a guide rod passing through the guide block; the guide rod is parallel to the screw; the screw and the drum are driven and connected The relationship between the lead a of the screw, the lead b of the spiral groove, and the transmission ratio i between the screw and the drum is: b=ai; the guide block is vertically provided with a through hole for the rope to pass through; the hanging device also includes a clamping mechanism for pressing the rope into the spiral groove; the clamping mechanism includes a plurality of circular shafts distributed along the circumference of the drum; the circular shafts are parallel to the drum, and each circular shaft is sleeved with a pressure wheel; the outer cylindrical surface of the pressure wheel contacts the outer surface of the rope, and a one-way bearing is provided between the pressure wheel and the circular shaft; the circular shaft closest to the guide mechanism is transmission-connected to the drum, and the transmission ratio is greater than 1; when releasing the rope, the one-way bearing is in a self-locking state; when collecting the rope, the one-way bearing is in a free-rotating state; the mounting portion includes a mounting plate and a manual rotating shaft rotatably supported on the mounting plate; the manual rotating shaft is parallel to the central axis of the drum;The motor's rotor extends out of the mounting plate and is connected to the manual shaft.

2. The hanging device according to claim 1, characterized in that: The reel is sleeved with a driving gear; the screw and the circular shaft closest to the guide mechanism are sleeved with a first passive gear and a second passive gear respectively; the first passive gear and the second passive gear are both engaged with the driving gear.

3. The hanging device according to claim 1, characterized in that: The guide block is provided with travel sensors on both sides along its movement direction, and the travel sensors are used to send signals when the guide block moves to the limit position.

Images