Lifting device and flag lifting system

Abstract

The utility model discloses a lifting device and a flag lifting system, and relates to the technical field of flag lifting. The lifting device comprises a mounting frame, a driving assembly, a rotating rod, a first action wheel and a manual driving part. The driving assembly is mounted on the mounting frame; the driving assembly is provided with an output shaft, and a first driving wheel is installed on the output shaft. The rotating rod is mounted on the mounting frame, and the axis of the rotating rod is parallel to the axis of the output shaft; a second driving wheel is mounted on the rotating rod; the second driving wheel is in transmission connection with the first driving wheel; the first action wheel is mounted on the rotating rod; a rope-shaped object is wound on the first action wheel, and the first action wheel can drive the rope-shaped object to ascend and descend; the manual driving part is arranged on the rotating rod and used for driving the rotating rod to rotate. The lifting device is used for improving the reliability of the lifting device during use.

Description

TECHNICAL FIELD

[0001] The utility model relates to flag hoisting and lowering technical field especially, and relates to a lifting device and flag hoisting and lowering system. BACKGROUND

[0002] At present, in the flag hoisting and lowering technical field, the lifting device generally adopts single drive mode, mainly including two forms of pure electric or pure manual. Among them, the pure electric drive mode is easily affected by the use scene, such as high temperature environment or humid environment, which is easy to damage the power components of the drive device, and the drive device has failed when it is needed to use, which delays the normal lifting work, and the pure manual drive mode is more labor-consuming when used.

[0003] Therefore, a lifting device is needed to solve the above technical problems. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a lifting device and flag hoisting and lowering system for improving the reliability of the lifting device when used.

[0005] To achieve this purpose, the utility model adopts the following technical scheme:

[0006] On the one hand, the utility model provides a lifting device, which comprises a mounting frame, a drive assembly, a rotating rod, a first action wheel and a manual drive part. The drive assembly is installed on the mounting frame; the drive assembly is provided with an output shaft, and a first drive wheel is installed on the output shaft; the rotating rod is installed on the mounting frame, and the axis of the rotating rod is arranged in parallel with the axis of the output shaft; the rotating rod is installed with a second drive wheel; the second drive wheel is in transmission connection with the first drive wheel; the first action wheel is installed on the rotating rod; a rope is arranged on the first action wheel, and the first action wheel can drive the rope to perform lifting action; the manual drive part is arranged on the rotating rod for driving the rotating rod to rotate.

[0007] In some embodiments, the lifting device further comprises a clutch assembly coupled with the drive assembly for controlling the power output of the drive assembly.

[0008] In some embodiments, the lifting device further comprises a first limiting assembly coupled with the clutch assembly and arranged at the end surface of one end of the rotating rod; the first limiting assembly can collect the number of turns of the rotating rod; when the number of turns of the rotating rod is a preset number of turns, the first limiting assembly sends a first electric signal to the clutch assembly, and the clutch assembly cuts off the power output of the drive assembly after receiving the first electric signal.

[0009] In some embodiments, the mounting frame comprises a front plate and a rear plate arranged in a spaced manner; the output shaft and the rotating rod both pass through the front plate and the rear plate; the first driving wheel and the second driving wheel are located on a side of the front plate away from the rear plate, and the first action wheel is located between the front plate and the rear plate; the rope is wound around the first action wheel between the front plate and the rear plate.

[0010] In some embodiments, the mounting frame further comprises a fixing plate and a fixing rod; the fixing plate is arranged on a side of the rear plate away from the front plate and is arranged in a spaced manner with the rear plate; the two ends of the fixing rod are connected with the rear plate and the fixing plate respectively; the driving assembly is arranged between the rear plate and the fixing plate and is detachably connected with the rear plate and the fixing plate respectively.

[0011] In some embodiments, the lifting device further comprises a clutch assembly; a second limiting assembly coupled with the clutch assembly is arranged on the mounting frame; a normal projection figure of the second limiting assembly in the vertical direction is located on the rim of the first action wheel; a permanent magnet is arranged at a first preset position of the rope; when the rope performs a lifting action, the first preset position is aligned with the second limiting assembly in the axial direction of the first action wheel, the second limiting assembly sends a second electric signal to the clutch assembly, and the clutch assembly cuts off the power output of the driving assembly after receiving the second electric signal.

[0012] In some embodiments, the lifting device further comprises a third limiting assembly coupled with the clutch assembly and arranged above the mounting frame; a mechanical trigger is arranged at a second preset position of the rope; when the rope performs a lifting action, the mechanical trigger contacts the third limiting assembly, the third limiting assembly sends a third electric signal to the clutch assembly, and the clutch assembly cuts off the power output of the driving assembly after receiving the third electric signal.

[0013] In some embodiments, the lifting device further comprises a manual limiting disc arranged at one end of the rotating rod close to the manual driving part.

[0014] In some embodiments, the lifting device further comprises a second action wheel mounted on the mounting frame; the axis of the second action wheel is arranged in parallel with the axis of the first action wheel, and the rim of the second action wheel is located in the same plane with the rim of the first action wheel; the rope is wound around the first action wheel and the second action wheel in sequence.

[0015] In one aspect, the utility model provides a kind of flag lifting system, the flag lifting system includes flagpole, the upper pulley group of being set to the top of flagpole, the lower pulley group of being set to the bottom of flagpole, balancer, rope, flag and the lifting device described in any one embodiment described above;The lifting device is installed in the flagpole;The flag is arranged in the rope;The rope is worn in the balancer, and simultaneously around the first action wheel of the upper pulley group, the lifting device and the lower pulley group.

[0016] The utility model has the advantages of:

[0017] In one aspect, the utility model provides a kind of lifting device, by setting up the drive assembly of being installed in mounting bracket and rotating rod, wherein, first drive wheel is installed on the output shaft of drive assembly, the axis of rotating rod is parallel with the axis of the output shaft of drive assembly, and second drive wheel and first action wheel that are transmissionally connected with first drive wheel are installed on rotating rod, and rope is around first action wheel. In this way, when needing to carry out lifting work, drive assembly is started, drive assembly drives output shaft to rotate, output shaft drives first drive wheel installed on itself to rotate synchronously, and first drive wheel can further drive second drive wheel transmissionally connected with itself to rotate, so that power (i.e. rotating action) from drive assembly can be transmitted to rotating rod through second drive wheel installed on rotating rod, when rotating rod rotates, first action wheel installed on rotating rod will rotate synchronously, so that rope around first action wheel can carry out lifting action along with the rotation of first action wheel. In addition, manual drive part is also provided on rotating rod, and staff can drive rotating rod to rotate by manually rotating the above-mentioned manual drive part, drive first action wheel installed on rotating rod to rotate, and then drive rope around first action wheel to carry out lifting action. During lifting work, drive assembly and manual drive part can independently drive rotating rod to rotate, and then drive rope to carry out lifting action, and staff can also directly manually pull rope to make rope carry out lifting action. The above-mentioned three driving modes can independently operate without affecting each other, and staff can flexibly select according to actual use demand, and even if a certain driving mode is inconvenient to use, other driving modes can be selected to carry out lifting work, to ensure that lifting work can be carried out smoothly, and the flexibility and reliability of the lifting device in use are improved.

[0018] In one aspect, the utility model provides a kind of flag lifting system, the flag lifting system includes all the technical features of the above-mentioned lifting device, so that the flag lifting system can have multiple flag lifting modes, improve the reliability and adaptability to environment of the flag lifting system, meet the use demand of different use scenarios. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structure diagram of a lifting device provided by the embodiment of the utility model, and the structure diagram is shown in the figure.

[0020] Figure 2 is Figure 1 is a sectional view structure diagram along the A-A direction of the structure shown in the figure.

[0021] Figure 3 is Figure 1 is a sectional view structure diagram along the B-B direction of the structure shown in the figure.

[0022] Figure 4 is a structure diagram of a flag lifting system provided by the embodiment of the utility model.

[0023] In the figure,

[0024] 1, mounting frame; 11, front plate; 12, rear plate; 13, fixed plate; 14, fixed rod; 2, driving assembly; 21, output shaft; 22, first driving wheel; 3, rotating rod; 31, second driving wheel; 32, first action wheel; 33, manual driving part; 34, second action wheel; 4, rope; 5, first limiting assembly; 6, second limiting assembly; 7, third limiting assembly; 8, manual limiting disc; 91, flagpole; 92, upper pulley set; 93, lower pulley set; 94, balancer; 95, flag; 100, lifting device. DETAILED DESCRIPTION

[0025] The utility model will be further explained in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not limited to the utility model. In addition, it should be noted that in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all the structures.

[0026] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, and the specific meaning of the above terms in the utility model can be understood by the person skilled in the art according to the specific circumstances.

[0027] In the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them.

[0028] In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like, orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used to distinguish in the description, and have no special meaning.

[0029] In combination Figures 1 to 3 As shown in the drawings, the present embodiment provides a lifting device 100, which comprises a mounting frame 1, a driving assembly 2, a rotating rod 3, a first action wheel 32, and a manual driving part 33.

[0030] As Figure 2 shown, the driving assembly 2 is mounted on the mounting frame 1, and the driving assembly 2 is provided with an output shaft 21, and a first driving wheel 22 is mounted on the output shaft 21 of the driving assembly 2. The driving assembly 2 is, for example, a rotary motor, and the output shaft 21 is connected to the rotor shaft of the rotary motor, for example, through a shaft coupling. The first driving wheel 22 is connected to the output shaft 21, for example, through a key. Of course, in special application scenarios, the first driving wheel 22 can be directly connected to the rotor shaft of the rotary motor, and those skilled in the art can make flexible settings according to the actual use scenario.

[0031] As Figure 2 shown, the rotating rod 3 is mounted on the mounting frame 1, and the axis of the rotating rod 3 is arranged in parallel with the axis of the output shaft 21. As an example, as shown in the view angle Figure 1 , the rotating shaft and the output shaft 21 both extend in the first direction. The rotating rod 3 is provided with a second driving wheel 31 (which is connected, for example, through a key or through interference fit), which is in transmission connection with the first driving wheel 22. As an example, the first driving wheel 22 and the second driving wheel 31 are both belt pulleys, and the transmission connection between them is achieved through a transmission belt; of course, the first driving wheel 22 and the second driving wheel 31 can also be gears, and the transmission connection between them is achieved through the meshing action of the gears. In addition, the rotational speed of the second driving wheel 31 can also be changed by changing the diameter ratio of the first driving wheel 22 and the second driving wheel 31 to meet different use requirements.

[0032] As Figure 2As shown, the first action wheel 32 is mounted on the rotating rod 3, for example, through a key connection or through a sleeve or taper sleeve connection. The rope 4 (for example, a steel wire rope) is wound around the first action wheel 32, and the first action wheel 32 can drive the rope 4 to perform a lifting action. Specifically, when the rotating rod 3 rotates, the first action wheel 32 mounted on the rotating rod 3 will rotate synchronously, so that the rope 4 wound around the first action wheel 32 can perform a lifting action with the rotation of the first action wheel 32.

[0033] As shown in Figure 2 , Figure 3 The manual driving part 33 is arranged on the rotating rod 3 and is used to drive the rotating rod 3 to rotate. The manual driving part 33 can be a rotating sleeve with anti-skid patterns, which is sleeved on the end of the rotating rod 3; or can be a rotating handle, which is detachably connected to the end of the rotating rod 3.

[0034] Thus, the lifting device 100 provided by the embodiment is provided with the driving assembly 2 and the rotating rod 3 installed on the mounting frame 1, wherein the first driving wheel 22 is installed on the output shaft 21 of the driving assembly 2, the axis of the rotating rod 3 is parallel to the axis of the output shaft 21 of the driving assembly 2, the second driving wheel 31 and the first action wheel 32 are installed on the rotating rod 3 and are in transmission connection with the first driving wheel 22, and the rope 4 is wound around the first action wheel 32. In this way, when the lifting work is needed, the driving assembly 2 is started, the driving assembly 2 drives the output shaft 21 to rotate, the output shaft 21 drives the first driving wheel 22 installed thereon to rotate synchronously, the first driving wheel 22 can further drive the second driving wheel 31 in transmission connection therewith to rotate, the power (i.e. the rotating action) from the driving assembly 2 can be transmitted to the rotating rod 3 through the second driving wheel 31 installed on the rotating rod 3, when the rotating rod 3 rotates, the first action wheel 32 installed on the rotating rod 3 rotates synchronously, and thus the rope 4 wound around the first action wheel 32 can perform the lifting action along with the rotation of the first action wheel 32. In addition, the manual driving part 33 is further installed on the rotating rod 3, the manual driving part 33 is manually rotated by the worker, the rotating rod 3 is driven to rotate, the first action wheel 32 installed on the rotating rod 3 is driven to rotate, and the rope 4 wound around the first action wheel 32 is further driven to perform the lifting action. During the lifting work, the driving assembly 2 and the manual driving part 33 can independently drive the rotating rod 3 to rotate, and further drive the rope 4 to perform the lifting action, and the worker can also directly manually pull the rope 4 to make the rope 4 perform the lifting action. The above three driving modes can be independently operated and do not affect each other, the worker can flexibly select according to the actual use requirement, and even if one driving mode is not convenient to use, the other driving mode can be selected to perform the lifting work, so as to ensure that the lifting work can be smoothly performed and improve the flexibility and reliability of the lifting device 100 in use.

[0035] In some embodiments, the lifting device 100 further comprises a clutch assembly coupled with the driving assembly 2 (coupled here includes electrical connection and signal connection), which is used to control the power output of the driving assembly 2. For example, the power source of the driving assembly 2 is a rotating motor, and the clutch assembly is a relay or contactor, which controls the on-off of the coil of the rotating motor by cutting off the current path directly. More specifically, for example, in the numerical control motor (MDS-EM / EMH series), the MC1 and MC2 relays control the opening and closing of the coil respectively, and the on-off of the circuit is realized by switching the state; for example, the power module in the VAD series of electric actuators adopts a separate coil design, which controls the coil separation by double independent signals to ensure the safe disconnection of the circuit. The clutch assembly can also be a controller-driven power device, which uses an electronic controller (such as an MCU) to control the on-off of a power device (such as a MOSFET) to dynamically separate the coil. More specifically, for example, the motor lock is turned on or off by the power device inside the controller to realize "dynamic locking" or "static locking" of the coil, preventing current flow. The clutch assembly can also be a mechanically separated clutch assembly, for example, the power source of the driving assembly 2 is a DC brush motor, in which the contact between the brush and the commutator is the key to the current path, and by mechanical structure design (such as spring-loaded brush), the brush can be separated from the commutator when needed, thereby cutting off the coil circuit; for example, an electromagnet, a clutch chuck, a return spring, and the like are arranged between the driving assembly 2 and the output shaft 21. The specific structure of the clutch assembly will not be described here, and those skilled in the art can make flexible choices according to actual use requirements.

[0036] In the lifting device 100, the power output of the driving assembly 2 is controlled by the clutch assembly coupled with the driving assembly 2, so that when the staff only needs to use the manual driving mode for lifting, the power output of the driving assembly 2 can be temporarily cut off, avoiding misoperation when using the manual driving mode for lifting, so that the driving assembly 2 suddenly provides power output, which interferes with the manual operation of the staff and even causes injury to the staff, thereby improving the safety of the lifting device 100 in use.

[0037] In some embodiments, as shown in Figure 2 , Figure 3 The lifting device 100 further comprises a first limiting assembly 5 coupled with the clutch assembly, which is arranged at the end face of one end of the rotating rod 3. The first limiting assembly 5 can collect the number of turns of the rotating rod 3, and when the number of turns of the rotating rod 3 is a preset number of turns, the first limiting assembly 5 sends a first electric signal to the clutch assembly, and the clutch assembly cuts off the power output of the driving assembly 2 after receiving the first electric signal sent by the first limiting assembly 5.

[0038] For example, the first limiting component 5 is a photoelectric meter counter or a Hall effect meter counter. This first limiting component 5 is fixed to the end face of one end of the rotating rod 3 by a fastener (e.g., a bolt). The photoelectric meter counter or Hall effect meter counter can detect rotation pulses using its own photoelectric encoder or Hall sensor, that is, detect the number of rotations of the rotating rod 3. Then, the microprocessor, combined with the circumference of the first actuating wheel 32, calculates the actual length by which the rope 4 rises or falls. When the number of rotations of the rotating rod 3 is a preset number, that is, when the length of movement of the rope 4 is a preset length, the first limiting component 5 can output a first electrical signal (such as relay contact closure or TTL level change) to trigger the clutch component to act, thereby cutting off the power output of the drive component 2, thus achieving a function similar to a limit switch. It is easy to understand that the first limiting component 5 can also be a mechanical meter counter. The operator can observe the count displayed on the mechanical meter counter and manually control the clutch component to cut off the power output of the drive component 2.

[0039] The aforementioned first limit component 5 can also have other structures. For example, the first limit component 5 can be a programmable logic controller (PLC), which integrates sensor inputs (such as encoder pulses) and logic operations through programming to achieve length measurement and segmented output control (such as the FX3U series PLC), and can simultaneously manage meter counting, alarms, and data communication (such as RS485 or Bluetooth modules). Alternatively, the first limit component 5 can be an intelligent counter or timer module. Such dedicated modules (such as the CX series from Dongqi Instruments) integrate meter counting, counting, and timing functions, and support preset thresholds and relay outputs. Those skilled in the art can flexibly select and use the specific structure of the first limit component 5 according to actual usage requirements, and will not be described in detail here.

[0040] In the aforementioned lifting device 100, by setting a first limiting component 5 at one end of the rotating rod 3, when the rotating rod 3 rotates a preset number of times (i.e., after the rope 4 rises or falls a preset length), the first limiting component 5 sends a first electrical signal to the clutch component, causing the clutch component to cut off the power output of the drive component 2. This achieves a function similar to a limiter, preventing the rope 4 from overwinding and breaking, while also preventing the connecting component that fixes the flag and the rope 4 from colliding with the flagpole 91, causing damage to the connecting component or detachment from the flagpole 91, thus improving the reliability of the aforementioned lifting device 100 during use.

[0041] In some embodiments, such as Figure 4 As shown, the lifting device 100 also includes a second limiting component 6 coupled to the clutch assembly. The second limiting component 6 is disposed above the mounting frame 1, for example, by means of a support member.

[0042] The first preset position of the rope 4 is provided with a mechanical trigger. When the rope 4 performs the lifting action and the mechanical trigger contacts the second limiting assembly 6, the second limiting assembly 6 sends a second electric signal to the clutch assembly, and the clutch assembly cuts off the power output of the driving assembly 2 after receiving the second electric signal from the second limiting assembly 6.

[0043] Exemplarily, the second limiting assembly 6 is a combination structure of a mechanical trigger switch and an electromagnetic limiter, and the mechanical trigger provided on the rope 4 is a steel ball. When the rope 4 performs the lifting action and runs to the limit position, the steel ball at the first preset position contacts the mechanical trigger switch, triggers the electromagnetic limiter through mechanical force after the contact, and then the electromagnetic limiter sends a trigger signal (i.e. the second electric signal) to the clutch assembly, so as to cut off the power output of the driving assembly 2.

[0044] In the lifting device 100, the second limiting assembly 6 is provided above the mounting frame 1, and the mechanical trigger is provided at the first preset position of the rope 4. When the rope 4 performs the lifting action and the mechanical trigger at the first preset position contacts the second limiting assembly 6, i.e. when the rope 4 runs to the limit position, the second limiting assembly 6 sends a second electric signal to the clutch assembly, and then the clutch assembly cuts off the power output of the driving assembly 2. In this way, the function of the limiter can be realized, the overwinding of the rope 4 is prevented, the connection assembly of the fixed flag and the rope 4 is prevented from colliding with the flagpole 91 to cause damage or fall off the flagpole 91, the reliability of the lifting device 100 in use is further improved, and the redundancy protection design is formed in cooperation with the first limiting assembly 5 to provide two-stage limiting protection for the lifting device 100 and improve the practicability of the lifting device 100.

[0045] In some embodiments, as shown in Figure 2 , Figure 3 The mounting frame 1 of the lifting device 100 includes the front plate 11 and the rear plate 12 which are spaced apart. Exemplarily, as viewed from the perspective shown in Figure 2 , the front plate 11 and the rear plate 12 are arranged in the horizontal direction and the plate surfaces thereof are parallel. The output shaft 21 of the driving assembly 2 and the rotating rod 3 both pass through the front plate 11 and the rear plate 12, and it is easy to understand that the connection between the output shaft 21 and the front plate 11 and the rear plate 12 and the connection between the transmission rod and the front plate 11 and the rear plate 12 are both rotatable connections (e.g. bearings are provided at the connection positions). The first driving wheel 22 and the second driving wheel 31 are located on the side of the front plate 11 away from the rear plate 12, and correspondingly, the driving assembly 2 is located on the side of the rear plate 12 away from the front plate 11, i.e. as viewed from the perspective shown in Figure 2Taking the shown perspective as an example, the first drive wheel 22 and the second drive wheel 31 are located on the left side of the front plate 11, and the drive assembly 2 is located on the right side of the rear plate 12. The aforementioned first drive wheel 32 is located between the front plate 11 and the rear plate 12, and the rope 4 is wound around the first drive wheel 32 between the front plate 11 and the rear plate 12.

[0046] In the aforementioned lifting device 100, by setting the mounting bracket 1 as a spaced-out front plate 11 and rear plate 12, mounting positions are provided for the drive assembly 2 and the rotating rod 3. The first actuating wheel 32 is positioned between the front plate 11 and the rear plate 12, allowing the rope 4 to be wound around the first actuating wheel 32 between the front plate 11 and the rear plate 12. This guides the rope 4 using the front plate 11 and the rear plate 12, preventing it from shifting and falling off the first actuating wheel 32 during use, thus improving the reliability of the lifting device 100. Furthermore, to prevent the rope 4 from shifting and falling off the first actuating wheel 32 during use, a limiting groove can be provided around the first actuating wheel 32. When the rope 4 is wound around the first actuating wheel 32, it can be positioned within the limiting groove, with the sidewall of the limiting groove further limiting the rope 4, further improving the reliability of the lifting device 100.

[0047] In some embodiments, such as Figure 2 , Figure 3 As shown, the mounting bracket 1 also includes a fixing plate 13 and a fixing rod 14. The fixing plate 13 is located on the side of the rear plate 12 opposite to the front plate 11 (i.e., with...). Figure 1 Taking the shown perspective as an example, the fixing plate 13 is located on the right side of the rear plate 12 and is spaced apart from the rear plate 12. The two ends of the fixing rod 14 are connected to the rear plate 12 and the fixing plate 13 respectively. The connection between the fixing rod and the front plate 11 and the rear plate 12 can be detachable (e.g., threaded or bolted) or fixed (e.g., welded). The drive assembly 2 is located between the rear plate 12 and the fixing plate 13 and is detachably connected to both the rear plate 12 and the fixing plate 13 (e.g., by bolts). This arrangement provides more support for the drive assembly 2, making the connection between the drive assembly 2 and the mounting components more secure and improving the stability of the drive assembly 2 during operation.

[0048] In some embodiments, such as Figure 1As shown, the mounting rack 1 is provided with a third limiting assembly 7 coupled with the clutch assembly. The third limiting assembly 7 is arranged on the front plate 11 of the mounting rack 1. The third limiting assembly 7 is in the vertical direction of the first action wheel 32. In other words, when the first action wheel 32 is provided with the rope 4 and the rope 4 is arranged vertically, the third limiting assembly 7 is arranged opposite to the rope 4 in the axial direction of the first action wheel 32.

[0049] The second preset position of the rope 4 is provided with a permanent magnet. When the rope 4 is lifted and the second preset position is aligned with the third limiting assembly 7 in the axial direction of the first action wheel 32, the third limiting assembly 7 sends a third electric signal to the clutch assembly. After receiving the third electric signal from the third limiting assembly 7, the clutch assembly cuts off the power output of the driving assembly 2. It is not difficult to understand that the distance between the second preset position and the first preset position in the vertical direction is equal to the distance between the permanent magnet and the mechanical trigger.

[0050] Exemplarily, the third limiting assembly 7 is a magnetic electronic limit stop. The magnetic electronic limit stop is a non-contact position detection device combining magnetic field sensing technology and electronic control system. It triggers a sensor signal through magnetic field change, and then controls the circuit or mechanical action. The core components of the magnetic electronic limit stop include a magnetic field sensor. The permanent magnet is installed on the moving part (i.e. the rope 4). When the moving part carrying the permanent magnet approaches the magnetic field sensor, the slight change of the magnetic field is captured in real time by the magnetic field sensor.

[0051] Specifically, the magnetic field sensor in the magnetic electronic limit stop is, for example, a Hall sensor. When the permanent magnet on the rope 4 approaches the magnetic electronic limit stop, a potential difference (Hall voltage) perpendicular to the surface of the Hall sensor is generated in the direction of the magnetic field. The voltage is proportional to the magnetic field strength. The Hall sensor outputs a level signal (i.e. the third electric signal) as the basis for position triggering. That is, when the magnetic field strength reaches the trigger threshold of the Hall sensor, the output pin level changes, thereby triggering the subsequent circuit.

[0052] The magnetic field sensor in the magnetic electronic limit stop can also be a reed switch (i.e. a magnetic reed switch). The metal reed sealed inside the reed switch is closed or opened under the magnetic field of the permanent magnet of the rope 4, which can directly change the on-off state of the circuit.

[0053] In the aforementioned lifting device 100, by setting a third limiting component 7 on the mounting frame 1 and a permanent magnet at the second preset position of the rope 4, when the rope 4 performs a lifting action, aligning the second preset position with the third limiting component 7 along the axial direction of the first actuating wheel 32, the third limiting component sends a first electrical signal to the clutch component, causing the clutch component to cut off the power output of the drive component 2. This achieves a function similar to a limit switch, preventing the rope 4 from overwinding and breaking, and avoiding collisions between the connecting component that fixes the flag and the rope 4 and the flagpole 91, which could damage the connecting component or cause it to detach from the flagpole 91. This further improves the reliability of the lifting device 100 during use. In addition, it works in conjunction with the first limiting component 5 and the second limiting component 6 to form a redundant protection design, providing multi-level limit protection for the lifting device 100 and improving its practicality.

[0054] In some embodiments, such as Figure 2 , Figure 3 As shown, the lifting device 100 also includes a manual limit plate 8. The manual limit plate 8 is located at the end of the rotating rod 3 near the manual drive unit 33. When manual mechanical limiting is required, the operator can use the manual limit plate 8 to limit the movement (for example, by connecting the manual limit plate 8 to a fixed object to restrict its rotation, thereby limiting the rotation of the rotating rod 3). Used in conjunction with the first limit component 5, the second limit component 6, and the third limit component 7, it forms a redundant protection design, providing multi-level limit protection for the lifting device 100 and improving its practicality.

[0055] In some embodiments, combined with Figure 1 , Figure 3 As shown, the lifting device 100 also includes a second actuating wheel 34. The second actuating wheel 34 is mounted on the mounting bracket 1, and its axis is parallel to the axis of the first actuating wheel 32. Furthermore, the rim of the second actuating wheel 34 and the rim of the first actuating wheel 32 are located in the same plane. The rope 4 is sequentially wound around the first actuating wheel 32 and the second actuating wheel 34. This arrangement increases the contact area between the rope 4 and the rim of the actuating wheel, preventing slippage during lifting and lowering, and allowing the power output from the rotating rod 3 to be better transmitted to the rope 4. Additionally, the second actuating wheel 34 allows for changing the direction of tension by altering the way the rope 4 is wound around the first and second actuating wheels 32 and 34, thus adapting to different usage scenarios and improving the practicality of the lifting device 100. Moreover, the speed ratio between the first actuating wheel 32 and the second actuating wheel 34 can be set according to actual needs; for example, the speed ratio between the first actuating wheel 32 and the second actuating wheel 34 could be 1:3.

[0056] On the other hand, as Figure 4 As shown in FIG. 14, the present application provides a flag lifting system, which comprises a flagpole 91, an upper pulley set 92 arranged at the top of the flagpole 91, a lower pulley set 93 arranged at the bottom of the flagpole 91, a balancer 94, a rope 4, a flag 95, and the lifting device 100 described in any of the above embodiments. The lifting device 100 is installed on the flagpole 91, and the flag 95 is arranged on the rope 4, which are detachably connected together, for example, through a flag connecting assembly. The rope 4 is arranged through the balancer 94, which can improve the stability of the rope 4 when performing lifting action. The rope 4 is also arranged around the upper pulley set 92, the first action wheel 32 of the lifting device 100, and the lower pulley set 93. Through the above arrangement, the flag lifting system can have multiple flag lifting modes, improve the reliability of the operation of the flag lifting system and the adaptability to the environment, and meet the use requirements of different use scenarios.

[0057] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present application. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent substitution and improvement within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A lifting device, characterized in that The utility model relates to a kind of rope lifting device, including: Mounting frame (1); Drive assembly (2) is installed in the mounting frame (1);The drive assembly (2) is equipped with output shaft (21), and first drive wheel (22) is installed on the output shaft (21);Rotary lever (3) is installed in the mounting frame (1), and the axis of the rotary lever (3) is parallel with the axis of the output shaft (21) arrangement;Second drive wheel (31) is installed in the rotary lever (3);The second drive wheel (31) is transmission connection with the first drive wheel (22); First action wheel (32) is installed in the rotary lever (3);Rope (4) is arranged in the first action wheel (32), and the first action wheel (32) can drive the rope (4) to carry out lifting action; Manual drive part (33) is arranged in the rotary lever (3), for driving the rotary lever (3) rotation. It further includes a clutch assembly coupled to the drive assembly (2) for controlling the power output of the drive assembly (2).

2. The lift device of claim 1, wherein, It further includes a first limiting assembly (5) coupled to the clutch assembly, arranged at the end surface of one end of the rotary lever (3);The first limiting assembly (5) can collect the number of turns of the rotary lever (3);When the number of turns of the rotary lever (3) is a preset number, the first limiting assembly (5) sends a first electrical signal to the clutch assembly, and the clutch assembly cuts off the power output of the drive assembly (2) after receiving the first electrical signal.

3. The lift device of claim 2, wherein, It further includes a second limiting assembly (6) coupled to the clutch assembly, arranged above the mounting frame (1); 4. The lift device of claim 2, wherein, The first preset position of the rope (4) is provided with a mechanical trigger;When the rope (4) carries out lifting action, the mechanical trigger contacts the second limiting assembly (6), the second limiting assembly (6) sends a second electrical signal to the clutch assembly, and the clutch assembly cuts off the power output of the drive assembly (2) after receiving the second electrical signal. The mounting frame (1) includes a front plate (11) and a rear plate (12) arranged at intervals;The output shaft (21) and the rotary lever (3) pass through the front plate (11) and the rear plate (12) at the same time;The first drive wheel (22) and the second drive wheel (31) are located on the side of the front plate (11) away from the rear plate (12), and the first action wheel (32) is located between the front plate (11) and the rear plate (12);The rope (4) is arranged around the first action wheel (32) between the front plate (11) and the rear plate (12).

5. The lift device of claim 1, wherein, The mounting frame (1) further includes a fixed plate (13) and a fixed rod (14);The fixed plate (13) is arranged on the side of the rear plate (12) away from the front plate (11), and is arranged at intervals with the rear plate (12);Both ends of the fixed rod (14) are connected with the rear plate (12) and the fixed plate (13) respectively;The drive assembly (2) is arranged between the rear plate (12) and the fixed plate (13), and is detachably connected with the rear plate (12) and the fixed plate (13) respectively.

6. The lift device of claim 5, wherein, ​ 7. The lift device of claim 5, wherein, Further comprising a clutch assembly; a third limiting assembly (7) is arranged on the mounting frame (1) and coupled with the clutch assembly; the third limiting assembly (7) has a vertical projection figure on the rim of the first action wheel (32); A permanent magnet is arranged at a second preset position of the rope (4); when the rope (4) performs the lifting action, the second preset position is aligned with the third limiting assembly (7) in the axial direction of the first action wheel (32), the third limiting assembly (7) sends a third electric signal to the clutch assembly, and the clutch assembly cuts off the power output of the driving assembly (2) after receiving the third electric signal.

8. The lift device of claim 1, wherein, Further comprising a manual limiting disc (8) arranged at one end of the rotating rod (3) close to the manual driving part (33).

9. The lift device of claim 1, wherein, Further comprising a second action wheel (34) mounted on the mounting frame (1); the axis of the second action wheel (34) is arranged in parallel with the axis of the first action wheel (32), and the rim of the second action wheel (34) is located in the same plane with the rim of the first action wheel (32); the rope (4) is arranged around the first action wheel (32) and the second action wheel (34) in sequence.

10. A flag raising and lowering system characterized by, The flagpole (91), the upper pulley set (92) arranged at the top of the flagpole (91), the lower pulley set (93) arranged at the bottom of the flagpole (91), the balancer (94), the rope (4), the flag (95), and the lifting device of any one of claims 1-9 are included. The lifting device is mounted on the flagpole (91); the flag is arranged on the rope (4); the rope (4) is arranged through the balancer (94) and around the upper pulley set (92), the first action wheel (32) of the lifting device, and the lower pulley set (93).

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