A hoisting device

Abstract

The present invention relates to the technical field of hoisting equipment, and specifically discloses a hoisting device, which includes a frame body and multiple groups of hoisting mechanisms arranged on the frame body. A driving mechanism is also arranged on the frame body. The hoisting mechanism includes a mounting seat, a steel wire rope, a first guiding wheel, and two second guiding wheels. Both of the two second guiding wheels are rotationally matched with the mounting seat. The first guiding wheel is slidably connected and rotationally matched with the mounting seat. The steel wire rope simultaneously bypasses the first guiding wheel and the second guiding wheels. The driving mechanism is used for winding or unwinding the steel wire rope; a compensation mechanism simultaneously connected to each hoisting mechanism is also arranged on the frame body. The compensation mechanism includes an adjusting member and a connecting portion. A cavity is formed inside the adjusting member. Each connecting portion corresponds to each hoisting mechanism one by one. The first guiding wheel is connected with a connecting member. One end of the connecting member extends into the connecting portion and slides along the inner wall of the connecting portion in a fitting manner. When the connecting member slides relative to the connecting portion, the internal pressure of the adjusting member is changed. The hoisting device of the present invention improves the hoisting stability and installation accuracy of the lighting truss.

Description

Technical Field

[0001] The present invention relates to the technical field of hoisting equipment, and particularly to a hoisting device. Background Art

[0002] During the stage construction process, as an important part of the stage, the lighting truss usually needs to be stably suspended and moved with the aid of a hoisting device. Due to the large volume and weight of the lighting truss, during the process of hoisting the lighting truss with a hoisting device, to ensure the safety of the hoisting operation, it is necessary to ensure that the hoisting device lifts the lighting truss stably and reduce the sway of the lighting truss during hoisting, so as to ensure the construction safety of the hoisting operation.

[0003] The patent application document with the publication number CN118992785A discloses a safe hoisting method for hard and soft scenery lighting trusses in theater stage performances, including a lifting component, a ground tensioning component, a hard scenery lighting truss, and a specific hoisting method for the hard scenery lighting truss. The lifting component includes a hoist driven by electricity. On both sides of the upper surface of the hoist, lifting cables are symmetrically arranged. Under the hoist, several steel wires for suspension are provided. The ground tensioning component includes a cross bar. Fixed mounting blocks are provided at both ends of the cross bar. Several fixing members are slidably arranged on the cross bar. A fastening mechanism is provided between the fixing member and the cross bar. A wire groove is provided under the fixing member. A pulley is rotatably arranged at the rear side of the wire groove. The steel wire passes through the wire groove and is slidably connected with the pulley. The hoisting method provided by this patent application document replaces the traditional method of first simply fixing and then hoisting, and makes detailed adjustments to the hard scenery lighting truss after hoisting. At the same time, it can avoid the wear of parts caused by the repeated reciprocating movement of the hanging rod. Through the ground tensioning component, the fixed points of the steel wire with the hard scenery lighting truss, the fixed points with the hoist, and the contact points with the pulley are all in a plane. After the ground tensioning component is separated from the steel wire and the hanging rod rises, each steel wire is in a tightened state and the hard scenery lighting truss is in the correct posture, and no further adjustment is required, thus omitting the later troublesome and somewhat dangerous process of tightening and adjusting the steel wire.

[0004] The hoisting method of the above patent application document tightens the lighting truss during hoisting by introducing a ground tensioning component and a lifting component to avoid its sway during hoisting. During the actual construction process, due to the large length of the lighting truss, multiple hanging points are usually set. When hoisting the lighting truss with multiple steel wires, the steel wires may have inconsistent retracting and releasing speeds due to uneven winding or pulley group deviation, thereby causing uneven stress on each steel wire. The uneven stress on each steel wire will cause the lighting truss to tilt or rotate in the air during hoisting, affecting the installation accuracy of the lighting truss and increasing the potential safety hazards of the hoisting operation. Summary of the Invention

[0005] The present invention provides a hoisting device, aiming to solve the problem that in the related art, when the hoisting device hoists a lighting truss, affected by the inconsistent winding and unwinding speeds of the steel wire ropes, the lighting truss is unevenly stressed during the hoisting process, resulting in tilting or rotation, and affecting the installation accuracy of the lighting truss.

[0006] The hoisting device of the present invention includes a frame body and multiple hoisting mechanisms arranged on the frame body. A driving mechanism is also arranged on the frame body. The hoisting mechanism includes a mounting seat, a steel wire rope, a first guide wheel, and two second guide wheels. Both of the two second guide wheels are rotationally matched with the mounting seat. The first guide wheel is slidably connected and rotationally matched with the mounting seat. The steel wire rope bypasses the first guide wheel and the second guide wheels at the same time. The driving mechanism is used for winding or unwinding the steel wire rope; a compensation mechanism connected to each of the hoisting mechanisms at the same time is also arranged on the frame body. The compensation mechanism includes an adjusting member and a connecting portion. A cavity is formed inside the adjusting member. Each of the connecting portions corresponds to each of the hoisting mechanisms one by one. The first guide wheel is connected with a connecting member. One end of the connecting member extends into the connecting portion and slides along the inner wall of the connecting portion in a fitting manner. When the connecting member slides relative to the connecting portion, the pressure inside the adjusting member is changed; an adjusting rod and a locking structure are also included. Both ends of the adjusting rod are used for movably connecting with both ends of the hoisted lighting truss. A plurality of connecting rings are evenly arranged at intervals along the axial direction of the adjusting rod. Each of the connecting rings is rotationally matched with the adjusting rod. Each of the steel wire ropes is fixedly connected with each of the connecting rings one by one. The locking structure is used for fixing the adjusting rod and the lighting truss.

[0007] The beneficial effects are as follows: The stability of hoisting is improved. By arranging multiple hoisting mechanisms, each hoisting mechanism is equipped with an independent steel wire rope and guide wheel system, which can evenly share the hoisting weight and avoid hoisting instability caused by uneven stress at a single point. Through the design of the adjusting member and the connecting portion, the compensation mechanism can automatically adjust the tension of each steel wire rope according to the stress conditions of each steel wire rope when the winding and unwinding speeds of the steel wire ropes are different due to uneven winding. For example, when a certain steel wire rope is wound too fast and the received tension is large, the steel wire rope pulls the first guide wheel and the connecting member to slide relative to the mounting seat, and then the connecting member and the connecting portion slide relative to each other, changing the pressure inside the adjusting member. The first guide wheels of other hoisting mechanisms adapt to the pressure change inside the adjusting member and their own tension magnitudes and slide relative to the mounting seat, making the stresses of each steel wire rope basically balanced. The automatic balancing function of the compensation mechanism can adjust the stresses of each hoisting mechanism in real time during the hoisting process, reduce potential safety hazards during the hoisting process, and improve construction safety;

[0008] To further ensure the stability of the center of gravity during the lifting process of the lighting stand, the adjusting rod and the locking structure cooperate to adjust the lifting position of the lighting stand before lifting according to the weight difference of different lighting stands, further optimizing the force distribution of the lighting stand during the lifting process and ensuring the force balance of the lighting stand during the lifting process; moreover, the cooperation between the adjusting member and the locking structure can quickly adjust the lifting center of gravity, with simple and fast operation, effectively improving the adjustment efficiency.

[0009] Preferably, one end of the adjusting rod is threadedly connected to one end of the lighting stand, and the other end of the adjusting rod is slidably connected and rotatably engaged with the other end of the lighting stand. The locking structure is used to limit the rotation of the adjusting rod relative to the lighting stand.

[0010] Preferably, the locking structure includes a limiting member and a pressing member. The limiting member is slidably sleeved on the adjusting rod and is fixed to the adjusting rod in the circumferential direction of the adjusting rod. The pressing member is used to movably press the limiting member.

[0011] The beneficial effects are as follows: improving the fixing and adjusting efficiency of the lighting stand before lifting. The threaded connection and sliding connection design of the adjusting rod enable the lifting device to quickly adjust the connection position of the steel wire rope, while the locking structure can quickly fix the position of the adjusting rod, making the lifting operation more convenient. The operator can quickly adjust the lifting position of the lighting stand through the adjusting rod and quickly fix it through the locking structure, reducing the time required for adjustment.

[0012] Preferably, a guiding groove is provided on the mounting seat, a guiding block slidably engaged with the guiding groove is provided on the connecting member, and the first guiding wheel is rotatably connected to the connecting member.

[0013] The beneficial effects are as follows: the sliding cooperation between the guiding groove and the guiding block further improves the stability of the sliding of the connecting member relative to the mounting seat.

[0014] Preferably, the connecting portion is cylindrical, one end of the connecting member extending into the connecting portion is rod-shaped, and a piston piece is fixed to the end of the connecting member extending into the connecting portion. The piston piece fits against the inner wall of the connecting portion and does not disengage from the connecting portion.

[0015] Preferably, an annular retaining edge extending in a direction close to its axis is provided at one end of the connecting portion away from the adjusting member, and the inner diameter of the retaining edge is smaller than the diameter of the piston piece.

[0016] Preferably, the two second guiding wheels of the same set of lifting mechanisms are respectively located on the upper and lower sides of the first guiding wheel.

[0017] Preferably, the driving mechanism includes a driving source, a driving shaft and a winding member. The driving source drives the driving shaft to rotate. A bidirectional spiral groove is provided on the driving shaft. The winding member is sleeved on the driving shaft and is in sliding fit with the spiral groove. One end of the steel wire rope is fixed to the winding member.

[0018] The beneficial effects are as follows: The balance of the winding of the steel wire rope on the winding member is improved. When the driving shaft rotates, the winding member slides reciprocally along the axis of the driving shaft under the guiding action of the spiral groove, so that the steel wire rope is evenly wound at different positions on the winding member, and the stability of the winding of the steel wire rope is enhanced.

[0019] Preferably, a plurality of wire inlet holes are provided on the frame body. Each wire inlet hole is arranged corresponding to each hoisting mechanism one by one, and each steel wire rope passes through the wire inlet hole.

[0020] The beneficial effects of the present invention are as follows:

[0021] (1) The stability of hoisting is improved. By arranging multiple groups of hoisting mechanisms, each hoisting mechanism is equipped with an independent steel wire rope and a guide wheel system, which can evenly share the hoisting weight, avoid the instability of hoisting caused by uneven single-point stress. Through the design of the adjusting member and the connecting part of the compensation mechanism, when the winding and unwinding speeds of each steel wire rope are different due to uneven winding, according to the stress conditions of each steel wire rope, the tension of each steel wire rope can be automatically adjusted to make the stress of each steel wire rope balanced. For example, when a certain steel wire rope winds too fast and the received tension is large, the steel wire rope pulls the guide wheel one and the connecting member to slide relative to the mounting seat, and then the connecting member slides relative to the connecting part, and the internal pressure of the adjusting member is changed. The guide wheel one of other hoisting mechanisms adapts to the change of the internal pressure in the adjusting member and its own tension size, and slides relative to the mounting seat, so that the stress of each steel wire rope is basically balanced. The automatic balancing function of the compensation mechanism can adjust the stress of each hoisting mechanism in real time during the hoisting process, reduce the potential safety hazards during the hoisting process, and improve the construction safety.

[0022] (2) Further ensure the stability of the center of gravity during the lifting process of the lighting truss. The adjusting rod and the locking structure cooperate to adjust the lifting position of the lighting truss before lifting according to the weight difference of different lighting trusses, and further optimize the stress distribution of the lighting truss during the hoisting process to ensure the stress balance of the lighting truss during the hoisting process; the threaded connection and sliding connection design of the adjusting rod enable the hoisting device to quickly adjust the connection position of the steel wire rope, while the locking structure can quickly fix the position of the adjusting rod, making the hoisting operation more convenient. The operator can quickly adjust the lifting position of the lighting truss through the adjusting rod and quickly fix it through the locking structure, reducing the time required for adjustment.

[0023] (3) Improve the balance of the wire rope winding on the winding member. When the driving shaft rotates, the winding member reciprocally slides along the axis of the driving shaft under the guiding action of the spiral groove, so that the wire rope is evenly wound at different positions on the winding member, thereby enhancing the stability of the wire rope winding. Description of the Drawings

[0024] Figure 1 is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 is Figure 1 the front view of

[0026] Figure 3 is Figure 1 the enlarged view of part A in

[0027] Figure 4 is a schematic diagram of the connection structure of each hoisting mechanism and the compensation mechanism in the present invention.

[0028] Figure 5 is Figure 4 the enlarged view of part B in

[0029] Figure 6 is the left view of the hoisting mechanism.

[0030] Figure 7 is a schematic diagram of the connection structure of the adjusting rod and the locking structure in the present invention.

[0031] Reference Numerals:

[0032] 1, frame body; 11, mounting plate; 12, driving source; 13, driving shaft; 131, spiral groove; 14, winding member; 2, mounting seat; 21, first guiding wheel; 22, second guiding wheel; 23, wire rope; 24, guiding groove; 3, connecting member; 31, guiding block; 32, adjusting member; 33, connecting portion; 4, adjusting rod; 41, connecting ring; 42, strip-shaped groove; 43, limiting member; 44, pressing member; 45, adjusting screw; 46, fastening nut; 5, lighting frame. Detailed Embodiments

[0033] The following describes in detail the embodiments of the present invention, and the examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0034] As Figures 1 to 3As shown in the figure, the hoisting device of the present invention includes a frame body 1, and a hoisting mechanism, a driving mechanism, and a compensation mechanism provided on the frame body 1. There are multiple groups of hoisting mechanisms, and each group of hoisting mechanisms is evenly spaced along the length direction of the frame body 1. The driving mechanism drives each group of hoisting mechanisms to hoist heavy objects synchronously. The hoisting mechanism includes a mounting seat 2, a steel wire rope 23, a first guide wheel 21, and a second guide wheel 22. The mounting seat 2 is fixed on the frame body 1. The first guide wheel 21 is slidably connected to the mounting seat 2, and the first guide wheel 21 can rotate relative to the mounting seat 2. There are two second guide wheels 22, and both second guide wheels 22 are rotatably connected to the mounting seat 2. The two second guide wheels 22 are respectively located on the upper side and the lower side of the first guide wheel 21. The first guide wheel 21 is slidably connected to the mounting seat 2 in the horizontal direction. The steel wire rope 23 bypasses the first guide wheel 21 and the two second guide wheels 22 at the same time. Multiple wire inlet holes are provided on the frame body 1, and each steel wire rope 23 passes through each wire inlet hole and is connected to the lifting point on the heavy object.

[0035] The driving mechanism is used to synchronously wind or unwind each steel wire rope 23, so that each hoisting mechanism hoists heavy objects synchronously. The compensation mechanism is simultaneously connected to the first guide wheel 21 in each hoisting mechanism, and is used to balance the force uniformity of each steel wire rope 23 during the hoisting process. The hoisting device provided by the present invention is used to hoist the lighting rack 5 during the stage construction process. In other embodiments, it can also be used to hoist other similar heavy objects.

[0036] The driving mechanism includes a driving source 12, a driving shaft 13, and a winding member 14. The driving source 12 drives the driving shaft 13 to rotate. The driving source 12 can directly drive the driving shaft 13 to rotate, or can indirectly drive the driving shaft 13 to rotate through gears or belts. In this embodiment, the driving source 12 is connected to the driving shaft 13 through a belt. Specifically, the driving source 12 is installed on the frame body 1. Two mounting plates 11 are fixed on the frame body 1. Both ends of the driving shaft 13 are rotatably connected to the two mounting plates 11. The belt is simultaneously sleeved on the driving end of the driving source 12 and one end of the driving shaft 13. When the driving source 12 works, it drives the driving shaft 13 to rotate through the belt. A bidirectional spiral groove 131 is provided on the driving shaft 13. The winding member 14 is sleeved on the driving shaft 13. The winding member 14 is slidably matched with the spiral groove 131. One end of the steel wire rope 23 is fixed to the winding member 14. When the driving shaft 13 rotates, the winding member 14 reciprocates along the axis of the driving shaft 13, so that when the winding member 14 winds the steel wire rope 23, the steel wire rope 23 is relatively evenly wound along the axial direction of the driving shaft 13, avoiding continuous winding of the steel wire rope 23 at the same position of the winding member 14, and improving the winding stability of the steel wire rope 23.

[0037] As Figures 3 to 6As shown, the compensation mechanism includes an adjusting member 32 and a connecting portion 33. The adjusting member 32 can be directly installed on the lighting stand 5 or can be fixed to each mounting base 2 at the same time. A cavity is formed inside the adjusting member 32. Each connecting portion 33 corresponds to each hoisting mechanism one by one. The first guide wheels 21 on each hoisting mechanism are respectively connected to each connecting portion 33 through a connecting member 3. Specifically, a guide groove 24 is further provided on the seat body, and a guide block 31 that is slidably matched with the guide groove 24 is provided on the connecting member 3. The first guide wheel 21 is rotatably connected to the connecting member 3. The connecting portion 33 is cylindrical. A piston piece is fixed at one end of the connecting member 3 for connecting to the connecting portion 33. The piston piece extends into the connecting portion 33 and slides along the inner wall of the connecting portion 33. To prevent the connecting member 3 from separating from the connecting portion 33, an annular retaining edge extends in the direction close to its axis at one end of the connecting portion 33 away from the adjusting member 32. The inner diameter of the retaining edge is smaller than the diameter of the piston piece. By providing the retaining edge, the connecting member 3 can be prevented from slipping out of the connecting portion 33.

[0038] The steel wire ropes 23 of each hoisting mechanism are connected to the hoisted lighting stand 5. When the forces on the steel wire ropes 23 are uneven, the steel wire rope 23 with a larger tension will pull the first guide wheel 21 to slide in the direction close to the second guide wheel 22, reducing the tension of the steel wire rope 23. The interior of the adjusting member 32 and the cavities in each connecting portion 33 that communicate with the interior of the adjusting member 32 together form an adjusting cavity. When the connecting member 3 slides with the first guide wheel 21, the piston piece at the end of the connecting member 3 slides in the connecting portion 33, changing the size of the internal space of the adjusting cavity and causing a change in the pressure inside the adjusting cavity. Under the action of the pressure change in the adjusting cavity and the tension of the steel wire rope 23, other connecting members 3 automatically adjust their relative positions with the connecting portion 33 and change the relative positions of the first guide wheel 21 and the mounting base 2. The compensation mechanism is used to adjust the tension of each steel wire rope 23 when the retracting and releasing of each steel wire rope 23 are uneven, so that the forces on each steel wire rope 23 are basically the same under the action of the compensation mechanism, ensuring the stability of the hoisting of the lighting stand 5, reducing the inclination or rotation of the lighting stand 5 during hoisting, and improving the safety of hoisting construction operations.

[0039] As Figure 1 、 Figure 2 and Figure 7 shown, to further improve the stability of the hoisting device for hoisting the lighting stand 5, the hoisting device further includes an adjusting rod 4 and a locking structure. The hoisting device is fixed to the lighting stand 5 through the adjusting rod 4 and the locking structure before hoisting, and during the fixing process, according to the shape difference of the lighting stand 5, the relative fixing position of the adjusting rod 4 and the lighting stand 5 is adjusted, further reducing the offset of the center of gravity of the lighting stand 5 during hoisting.

[0040] One end of the adjusting rod 4 is provided with an external thread, and the other end of the adjusting rod 4 is provided with a strip-shaped groove 42 parallel to the axis of the adjusting rod 4. A plurality of strip-shaped grooves 42 can be provided, and the strip-shaped grooves 42 are evenly spaced along the circumferential direction of the adjusting rod 4. One end of the lighting bracket 5 is provided with a threaded hole adapted to the threaded end of the adjusting rod 4, and the other end of the lighting bracket 5 is provided with a through hole slidably matched with the adjusting rod 4. A plurality of connecting rings 41 are evenly spaced along the axial direction of the adjusting rod 4. The connecting rings 41 are rotatably matched with the adjusting rod 4, and each steel wire rope 23 corresponds to and is fixedly connected with each connecting ring 41. By rotating the adjusting rod 4, the relative position between the adjusting rod 4 and the lighting bracket 5 can be adjusted, and thus the position of the center of gravity of the lifted lighting bracket 5 can be adjusted. The locking structure is used to lock and fix the relative position between the lighting bracket 5 and the adjusting rod 4 after the adjustment of the center of gravity of the lifted lighting bracket 5 is completed.

[0041] The locking structure includes a limiting member 43 and a pressing member 44. The limiting member 43 is annular, and a limiting protrusion is provided on the inner side of the limiting member 43. The limiting member 43 is slidably sleeved on one end of the adjusting rod 4 provided with the strip-shaped groove 42. The limiting protrusion is slidably matched with the strip-shaped groove 42. The limiting member 43 is relatively fixed to the adjusting rod 4 in the circumferential direction. The pressing member 44 is movably pressed against the limiting member 43. After the pressing member 44 presses the limiting member 43 to fit with the lighting bracket 5, the limiting member 43 does not rotate relative to the lighting bracket 5 under the action of friction, thereby restricting the rotation of the adjusting rod 4 and maintaining the stability of the relative position between the adjusting rod 4 and the lighting bracket 5. To increase the friction between the limiting member 43 and the lighting bracket 5, the opposite end faces of the limiting member 43 and the lighting bracket 5 can be set as rough surfaces, or rubber strips for increasing friction can be provided on the opposite end faces of the limiting member 43 and the lighting bracket 5.

[0042] An adjusting screw 45 is fixed to one end of the lighting bracket 5 in contact with the limiting member 43. The pressing member 44 is slidably matched with the adjusting screw 45. A fastening nut 46 is threadedly connected to the adjusting screw 45. After the position of the adjusting rod 4 is adjusted, the fastening nut 46 is rotated to push the pressing member 44 to slide along the adjusting screw 45 until the pressing member 44 fully presses the limiting member 43. Among them, two adjusting screws 45 can be provided, and the two adjusting screws 45 are respectively arranged on both sides of the adjusting rod 4. The pressing member 44 is simultaneously slidably sleeved in the two adjusting screws 45. After the relative position between the adjusting rod 4 and the lighting bracket 5 is adjusted, the pressing member 44 is pushed to tightly abut against the limiting member 43, and at the same time, the two fastening nuts 46 are rotated to fully press the limiting member 43, so that the limiting member 43 is closely attached to the lighting bracket 5, avoiding the rotation of the limiting member 43 relative to the lighting bracket 5, and thus avoiding the change of the relative position between the adjusting rod 4 and the lighting bracket 5.

[0043] In other embodiments, the relative positions of the adjusting rod 4 and the lighting stand 5 can also be fixed in other ways. Specifically, external threads can be provided at both ends of the adjusting rod 4, and through holes for the two ends of the adjusting rod 4 to pass through are provided at both ends of the lighting stand 5. The locking structure includes two nuts. After the relative positions of the adjusting rod 4 and the lighting stand 5 are adjusted, the two nuts are screwed onto both ends of the adjusting rod 4, and the two nuts are respectively attached to both ends of the lighting stand 5, so that the adjustment and fixation of the relative positions of the adjusting rod 4 and the lighting stand 5 can also be completed.

[0044] During the stage construction process, the hoisting device provided by the present invention adjusts the hoisting center of gravity of the lighting stand through the adjusting member and the locking structure before hoisting, reduces the offset during the hoisting of the lighting stand, and when the wire ropes are unevenly retracted and released, the tension of each wire rope is adjusted through the compensation mechanism, so that the forces on each wire rope are basically the same, ensuring the stability of the lighting stand hoisting.

[0045] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A hoisting device, comprising a frame body and multiple groups of hoisting mechanisms arranged on the frame body, and a driving mechanism is further arranged on the frame body, and is characterized in that, The hoisting mechanism includes a mounting base, a steel wire rope, a first guide pulley, and two second guide pulleys. Both of the two second guide pulleys are rotationally engaged with the mounting base. The first guide pulley is slidably and rotationally connected to the mounting base. The steel wire rope bypasses the first guide pulley and the second guide pulleys at the same time. The driving mechanism is used for winding or unwinding the steel wire rope. A compensation mechanism connected to each of the hoisting mechanisms is further provided on the frame body. The compensation mechanism includes an adjusting member and a connecting portion. A cavity is formed inside the adjusting member. Each of the connecting portions corresponds to one of the hoisting mechanisms. The first guide pulley is connected with a connecting member. One end of the connecting member extends into the connecting portion and slides along the inner wall of the connecting portion. When the connecting member slides relative to the connecting portion, the pressure inside the adjusting member is changed. An adjusting rod and a locking structure are further included. Both ends of the adjusting rod are movably connected to both ends of the suspended lighting frame. A plurality of connecting rings are evenly arranged at intervals along the axial direction of the adjusting rod. Each of the connecting rings is rotationally engaged with the adjusting rod. Each of the steel wire ropes is fixedly connected to one of the connecting rings. The locking structure is used for fixing the adjusting rod and the lighting frame.

2. The hoisting device according to claim 1, characterized in that, One end of the adjusting rod is threadedly connected to one end of the lighting frame. The other end of the adjusting rod is slidably and rotationally connected to the other end of the lighting frame. The locking structure is used for restricting the adjusting rod from rotating relative to the lighting frame.

3. The hoisting device according to claim 2, characterized in that, The locking structure includes a limiting member and a pressing member. The limiting member is slidably sleeved on the adjusting rod. The limiting member is fixed to the adjusting rod in the circumferential direction of the adjusting rod. The pressing member is used for movably pressing the limiting member.

4. The hoisting device according to claim 1, characterized in that, A guide groove is provided on the mounting base. A guide block slidably engaged with the guide groove is provided on the connecting member. The first guide pulley is rotationally connected to the connecting member.

5. The hoisting device according to claim 1, wherein The connecting portion is cylindrical. One end of the connecting member extending into the connecting portion is rod-shaped. A piston piece is fixed to the end of the connecting member extending into the connecting portion. The piston piece is attached to the inner wall of the connecting portion and does not disengage from the connecting portion.

6. The hoisting device according to claim 5, characterized in that An annular retaining edge extending in the direction close to its axis is provided at one end of the connecting portion away from the adjusting member. The inner diameter of the retaining edge is smaller than the diameter of the piston piece.

7. The hoisting device according to claim 1, characterized in that, The two second guide pulleys of the same group of hoisting mechanisms are respectively located on the upper and lower sides of the first guide pulley.

8. The hoisting device according to claim 1, characterized in that, The driving mechanism includes a driving source, a driving shaft, and a winding member. The driving source drives the driving shaft to rotate. A bidirectional spiral groove is provided on the driving shaft. The winding member is sleeved on the driving shaft. The winding member is slidably engaged with the spiral groove. One end of the steel wire rope is fixed to the winding member.

9. The hoisting device according to claim 1, wherein, A plurality of wire inlet holes are provided on the frame body. Each of the wire inlet holes corresponds to one of the hoisting mechanisms. Each of the steel wire ropes passes through the wire inlet hole.

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