Lifting mechanism of stage truss

Abstract

The utility model provides a lifting mechanism of a stage truss, and belongs to the technical field of stage equipment. The technical problems that steel wire ropes of lifting points on an existing truss are prone to mutual interference, and synchronism is poor are solved. A main guide piece is fixed above a crane of the lifting mechanism of the stage truss, an auxiliary guide piece is arranged above the truss, a steel wire rope is sequentially wound in a spiral groove of a winding drum, and an auxiliary guide wheel of the auxiliary guide piece is provided with an auxiliary guide groove. One end of the steel wire rope is fixedly connected with the winding drum, the other end of the steel wire rope sequentially penetrates through the main guide piece, the auxiliary guide piece and the auxiliary guide groove corresponding to the auxiliary guide piece and is fixedly connected with the truss, and all the auxiliary guide wheels are located in the same vertical plane. A plurality of steel wire ropes are simultaneously driven by the winding drum to be synchronously wound and unwound, and the synchronism is good; all the auxiliary guide wheels are located in the same vertical plane, and it is guaranteed that lifting points, connected with the steel wire rope, on the truss are located on the same straight line.

Description

Technical Field

[0001] The utility model belongs to the technical field of stage equipment, in particular to a lifting mechanism of a stage truss. Background Art

[0002] With the development of studio and stage programs, higher requirements are placed on studio and stage technology and equipment, and more and more equipment needs to be installed in studio and stage. For the lifting and lowering of studio and stage lighting or scenery devices, a crane with a hanging lighting or scenery device fixing frame is required to perform lifting, adjustment and arrangement of lighting or scenery devices.

[0003] At present, when the stage is arranged, the lamps or scenery above the stage are generally fixed on the truss, and the lifting and lowering of the lamps and / or scenery fixed on the truss is controlled by controlling the lifting and lowering of the truss. In order to ensure the firmness of the truss lifting and improve safety, more than three lifting points are generally required on a truss. How to prevent the steel wire ropes between the lifting points from interfering with each other, how to ensure that the lifting points are located on the same straight line and how to improve the synchronization of the lifting and lowering between the lifting points have become technical problems that need to be solved urgently. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a lifting mechanism for a stage truss which can improve the lifting synchronization between various hanging points and prevent multiple steel wire ropes from interfering with each other.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A lifting mechanism for a stage truss, comprising a crane, a truss and at least three steel ropes, characterized in that it comprises a main guide piece fixed above the crane and auxiliary guide pieces having the same number as the steel ropes, the truss being located directly below the auxiliary guide pieces, a spiral groove being provided on the drum of the crane, the steel rope being fixedly connected to the drum in turn and being capable of being wound in the spiral groove, an auxiliary guide wheel being rotatably provided in the auxiliary guide piece, an auxiliary guide groove being capable of accommodating the steel rope being provided on the outer peripheral surface of the auxiliary guide wheel, one end of the steel rope being fixedly connected to the drum, the other end passing through the main guide piece, the auxiliary guide piece and the auxiliary guide groove of the corresponding auxiliary guide piece in turn and being fixedly connected to the truss, and all the auxiliary guide wheels being located in the same vertical plane.

[0007] The lifting mechanism drives multiple wire ropes to be retracted and released synchronously through the drum of the same crane, so that the synchronization of the retracted and released wire ropes is better, thereby improving the synchronization of lifting and lowering between various suspension points on the truss; the cooperation of the main guide and the auxiliary guide can play a good guiding role on the wire rope, avoiding the wire rope from being pulled, pulled out, and broken during repeated lifting and lowering. The wire rope is bent downward at the auxiliary guide wheel and connected to the truss. The bending angle is close to 90 degrees. The design of the auxiliary guide wheel can increase the bending diameter, enable the wire rope to smoothly transition when bending downward, and improve the service life of the wire rope; an auxiliary guide is arranged above each suspension point, and each auxiliary guide has a wire rope that passes through the auxiliary guide wheel and then extends downward to connect with the suspension point, effectively avoiding the mutual interference between the wire ropes; the design that all auxiliary guide wheels are located in the same vertical plane can ensure that all wire ropes extending downward through the auxiliary guide wheel are located in the same plane, thereby ensuring that the suspension points on the truss connected with the wire ropes are located on the same straight line.

[0008] In the above-mentioned lifting mechanism of a stage truss, the auxiliary guide member includes two auxiliary mounting plates, an auxiliary mounting rod, an auxiliary limiting rod and an auxiliary guide wheel. The two auxiliary mounting plates are symmetrically arranged, the lower parts of the two auxiliary mounting plates are fixedly connected by two auxiliary mounting rods arranged at a laterally interval, and the upper parts are connected by two auxiliary limiting rods arranged at a laterally interval. The auxiliary guide wheel is installed on the auxiliary mounting rod away from the side of the crane, and the auxiliary guide wheel is arranged close to the auxiliary mounting plate on the front side.

[0009] The design of the auxiliary mounting rod and the auxiliary limiting rod can be used to fix the two auxiliary mounting plates, wherein the design of the auxiliary mounting rod can also support and guide the wire rope passing through the auxiliary guide member, and the auxiliary guide wheel can guide and increase the bending radius of the wire rope connected to the suspension point after passing through the auxiliary guide wheel, which is beneficial to improve the stability and service life of the wire rope during the lifting process; the design of the auxiliary limiting rod can limit the wire rope in the auxiliary guide groove to prevent the wire rope from escaping from the auxiliary guide groove; further, the design of the auxiliary mounting plate close to the front side of all the auxiliary guide wheels facilitates the alignment of all the auxiliary guide wheels.

[0010] In the above-mentioned lifting mechanism of a stage truss, a cylindrical positioning card is sleeved on the auxiliary mounting rod close to the crane side of the auxiliary guide member, and a plurality of positioning slide grooves are arranged on the outer peripheral surface of the positioning card at axial intervals along the auxiliary mounting rod. The positioning card is arranged close to the auxiliary mounting plate on the rear side, and the steel wire ropes that have not passed through the auxiliary guide grooves are all inserted into the corresponding positioning slide grooves and enter the next auxiliary guide member.

[0011] The number of auxiliary guide parts, steel wire ropes and suspension points in the lifting mechanism is the same. Except for one steel wire rope that is bent downward and fixedly connected to the corresponding suspension point on the auxiliary guide part closest to the crane, the remaining steel wire ropes pass through the auxiliary guide part and are connected to other auxiliary guide parts in sequence. The design of the above-mentioned positioning card can position the steel wire rope that does not bend downward at the auxiliary guide part, ensure that the steel wire ropes do not interfere with each other, avoid the steel wire ropes from being entangled with each other, and help improve the stability of the lifting mechanism during operation.

[0012] In the above-mentioned lifting mechanism of a stage truss, the auxiliary guide member also includes a connecting rod, which is longitudinally installed on the front part of the auxiliary mounting plate, and the connecting rod is arranged close to the auxiliary guide wheel. The gap between the connecting rod and the outer peripheral surface of the auxiliary guide wheel is smaller than the diameter of the wire rope.

[0013] The design of the connecting rod can not only strengthen the structural strength of the front end of the auxiliary guide member, but also limit the wire rope in the auxiliary guide groove, so that the bent wire rope remains in the auxiliary guide groove, which is beneficial to improve the stability of the lifting mechanism during operation.

[0014] In the above-mentioned lifting mechanism of a stage truss, the two auxiliary mounting rods are located on the same horizontal plane, the two auxiliary limit rods are located on the same horizontal plane, one of the auxiliary limit rods is arranged close to the auxiliary guide wheel, and the gap between the auxiliary limit rod and the upper edge of the auxiliary guide wheel is smaller than the diameter of the wire rope.

[0015] The above-mentioned setting of the position relationship between the auxiliary limiting rod and the auxiliary guide wheel can further limit the wire rope in the auxiliary guide groove, thereby improving the stability of the lifting mechanism during operation.

[0016] In the above-mentioned lifting mechanism of the stage truss, the lower end of the auxiliary mounting plate is bent outward to form a connecting portion, and the connecting portion is fixedly connected to the mounting frame above the stage through a fastener.

[0017] The auxiliary guide is fixedly connected to the mounting frame above the stage through the connecting part, and the connecting method is simple, the connecting speed is fast, and the connection is more stable.

[0018] In the above-mentioned lifting mechanism of a stage truss, main guide wheels with the same number as the steel wire ropes are arranged in the transverse direction inside the main guide member, and main guide grooves capable of accommodating the steel wire ropes are provided on the outer circumference of the main guide wheels, and the main guide wheels are staggered in the longitudinal direction.

[0019] The staggered arrangement of the main guide wheels in the longitudinal direction can effectively avoid interference between the wire ropes. At the same time, the design of the main guide groove can also have a good limiting effect on the wire ropes.

[0020] In the above-mentioned lifting mechanism of a stage truss, the main guide member includes a main mounting plate, a main mounting rod and a main limiting rod. There are two main mounting plates and they are symmetrically arranged front to back. The main mounting rod is installed between the two main mounting plates along the lateral interval. Each main mounting rod is provided with a main guide wheel. The two ends of the main limiting rod are respectively fixedly connected to the two main mounting plates. The main limiting rod is arranged on the upper side of the main guide wheel, and the gap between the main limiting rod and the main guide wheel is smaller than the diameter of the wire rope.

[0021] The design of the main mounting rod and the main limit rod can be used to fix the two main mounting plates. The main guide wheel rotatably arranged on the main mounting rod can also support and guide the wire rope, which is beneficial to improve the stability and service life of the wire rope during movement during lifting; the design of the main limit rod can limit the wire rope in the main guide groove to prevent the wire rope from falling out of the main guide groove.

[0022] In the above-mentioned lifting mechanism of a stage truss, the crane includes a base, a driving motor, a reducer and a drum, the drum is rotatably mounted on the base, the reducer is fixedly connected to the base, and the driving motor drives the drum to rotate through the reducer.

[0023] The drum is connected to the driving motor through a reducer, which can improve the stability of the drum during rotation and make the lifting and lowering of the truss more stable.

[0024] In the above-mentioned lifting mechanism of the stage truss, the leftmost main guide wheel is arranged close to the main mounting plate on the front side, the rightmost main guide wheel is arranged close to the main mounting plate on the rear side, all the main guide wheels are arranged gradually backward from left to right, and the reel is located directly below the main guide wheel and is arranged to be inclined to the left front and right rear.

[0025] The inclined reel and the staggered main guide wheels cooperate so that the wire rope wound on the reel can be directly connected to the corresponding main guide wheels without any interlacing in between, which is beneficial to improving the stability of the lifting mechanism during operation. At the same time, it can also effectively improve the synchronization of lifting and lowering of each lifting point and the service life of the wire rope when the lifting mechanism is working.

[0026] Compared with the prior art, the technical effects of the utility model are:

[0027] 1. The utility model drives multiple steel wire ropes to be retracted and released synchronously through the drum of the same crane, so that the synchronization of the retraction and release of the steel wire ropes is better, thereby improving the synchronization of the lifting and lowering between the various hanging points on the truss.

[0028] 2. The cooperation between the main guide and the auxiliary guide in the utility model can play a better guiding role for the wire rope, avoiding the wire rope from being stretched, pulled out, or broken during repeated lifting and lowering, thereby increasing the service life of the wire rope.

[0029] 3. A secondary guide is provided above each suspension point of the truss of the utility model, and each secondary guide has a steel wire rope that passes through the secondary guide wheel and extends downward to be connected to the suspension point, which effectively avoids the mutual interference between the steel wire ropes.

[0030] 4. The design of all auxiliary guide wheels in the utility model being located in the same vertical plane can ensure that all steel wire ropes extending downward through the auxiliary guide wheels are located in the same plane, thereby ensuring that the hanging points on the truss connected to the steel wire ropes are located in the same straight line. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0032] Figure 2 It is a top view of the main guide member and the auxiliary guide member of the utility model after being connected.

[0033] Figure 3 It is a schematic diagram of the structure inside the main guide member of the utility model.

[0034] Figure 4 It is a schematic diagram of the internal structure of the auxiliary guide member of the utility model.

[0035] Figure 5 It is a structural schematic diagram of a crane of the utility model.

[0036] Figure 6 It is a structural schematic diagram of the main guide wheel of the utility model.

[0037] Figure 7 It is a structural schematic diagram of a positioning card of the utility model.

[0038] In the figure, 1, crane; 11, drum; 111, spiral groove; 12, base; 13, drive motor; 14, reducer; 2, truss; 3, wire rope; 4, main guide member; 41, main mounting plate; 42, main mounting rod; 43, main limit rod; 44, main guide wheel; 441, main guide groove; 5, auxiliary guide member; 51, auxiliary mounting plate; 511, connecting part; 52, auxiliary mounting rod; 53, auxiliary limit rod; 54, auxiliary guide wheel; 541, auxiliary guide groove; 55, positioning card; 551, positioning slide groove; 56, connecting rod; 6, mounting frame. DETAILED DESCRIPTION

[0039] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0040] The lifting mechanism of the stage truss 2 includes a crane 1, a truss 2, at least three steel ropes 3, auxiliary guides 5 having the same number as the steel ropes 3, and a main guide 4 fixed on the crane 1, the truss 2 is located directly below the auxiliary guide 5, a spiral groove 111 is provided on the drum 11 of the crane 1, four steel ropes 3 are fixedly connected to the drum 11 in sequence and can be wound in the spiral groove 111, an auxiliary guide wheel 54 is rotatably provided in the auxiliary guide, and an auxiliary guide groove 541 capable of accommodating the steel ropes 3 is provided on the outer peripheral surface of the auxiliary guide wheel 54, one end of the steel rope 3 is fixedly connected to the drum 11, and the other end passes through the main guide 4, the auxiliary guide 5 and the auxiliary guide groove 541 corresponding to the auxiliary guide 5 in sequence and is fixedly connected to the truss 2, and all the auxiliary guide wheels 54 are located in the same vertical plane. The lifting mechanism drives multiple wire ropes 3 to be retracted and released synchronously through the drum 11 of the same crane 1, so that the synchronization of the retraction and release of the wire ropes 3 is better, thereby improving the synchronization of the lifting and lowering between the various suspension points on the truss 2; the main guide member 4 and the auxiliary guide member 5 cooperate to play a good guiding role on the wire rope 3, avoiding the wire rope 3 from being stretched, pulled out, and broken during repeated lifting and lowering. The wire rope 3 is bent downward at the auxiliary guide wheel 54 and connected to the truss 2. The bending angle is close to 90 degrees. The design of the auxiliary guide wheel 54 can increase the bending diameter, which can make the wire rope The rope 3 smoothly transitions when bending downward, which improves the service life of the wire rope 3; a secondary guide 5 is arranged above each suspension point, and each secondary guide 5 has a wire rope 3 that passes through the secondary guide wheel 54 and extends downward to connect with the suspension point, effectively avoiding the mutual interference between the wire ropes 3; the design that all the secondary guide wheels 54 are located in the same vertical plane can ensure that all the wire ropes 3 extending downward through the secondary guide wheels 54 are located in the same plane, thereby ensuring that the suspension points connected to the wire ropes 3 on the truss 2 are located on the same straight line. Preferably, the number of wire ropes 3 in this embodiment is four, and four suspension points are arranged on the truss 2.

[0041] like Figure 1 , Figure 2 and Figure 4As shown, the auxiliary guide member 5 includes two auxiliary mounting plates 51, an auxiliary mounting rod 52, an auxiliary limiting rod 53 and an auxiliary guide wheel 54. The two auxiliary mounting plates 51 are symmetrically arranged. The lower parts of the two auxiliary mounting plates 51 are fixedly connected by two auxiliary mounting rods 52 arranged at intervals in the horizontal direction, and the upper parts are connected by two auxiliary limiting rods 53 arranged at intervals in the horizontal direction. The auxiliary guide wheel 54 is installed on the auxiliary mounting rod 52 away from the side of the crane 1, and the auxiliary guide wheel 54 is arranged close to the auxiliary mounting plate 51 on the front side; the auxiliary guide member 5 also includes a connecting rod 56, which is longitudinally mounted on the auxiliary mounting plate 51 At the front part, the connecting rod 56 is arranged close to the auxiliary guide wheel 54, and the gap between the connecting rod 56 and the outer peripheral surface of the auxiliary guide wheel 54 is smaller than the diameter of the wire rope 3; the two auxiliary mounting rods 52 are located on the same horizontal plane, and the two auxiliary limiting rods 53 are located on the same horizontal plane, one of the auxiliary limiting rods 53 is arranged close to the auxiliary guide wheel 54, and the gap between the auxiliary limiting rod 53 and the upper edge of the auxiliary guide wheel 54 is smaller than the diameter of the wire rope 3; the lower end of the auxiliary mounting plate 51 is bent outward to form a connecting portion 511, and the connecting portion 511 is fixedly connected to the mounting frame 6 above the stage by fasteners.

[0042] The design of the secondary mounting rod 52 and the secondary limiting rod 53 can be used to fix the two secondary mounting plates 51, wherein the design of the secondary mounting rod 52 can also support and guide the steel wire rope 3 passing through the secondary guide member 5, and the secondary guide wheel 54 can guide and increase the bending radius of the steel wire rope 3 connected to the suspension point after passing through the secondary guide wheel 54, which is beneficial to improve the stability and service life of the steel wire rope 3 during the lifting process; the design of the secondary limiting rod 53 can limit the steel wire rope 3 in the secondary guide groove 541 to prevent the steel wire rope 3 from slipping out of the secondary guide groove 541; further, the design of all the secondary guide wheels 54 close to the front side of the secondary mounting plate 51 facilitates the alignment of all the secondary guide wheels 54. The design of the above-mentioned connecting rod 56 can not only strengthen the structural strength of the front end of the secondary guide member 5, but also limit the steel wire rope 3 located in the secondary guide groove 541, so that the bent steel wire rope 3 is still in the secondary guide groove 541, which is beneficial to improve the stability of the lifting mechanism during operation. The positional relationship between the auxiliary limiting rod 53 and the auxiliary guide wheel 54 can further limit the wire rope 3 in the auxiliary guide groove 541, thereby improving the stability of the lifting mechanism during operation. The auxiliary guide member 5 is fixedly connected to the mounting frame 6 above the stage through the connecting portion 511, and the connection method is simple, the connection speed is fast, and the connection is more stable.

[0043] like Figure 4 and Figure 7As shown, a cylindrical positioning fixture 55 is sleeved on the secondary mounting rod 52 near the side of the crane 1 in the secondary guide member 5, and a plurality of positioning slots 551 are arranged at intervals along the axial direction of the secondary mounting rod 52 on the outer peripheral surface of the positioning fixture 55, and the positioning fixture 55 is arranged near the secondary mounting plate 51 on the rear side, and the steel wire ropes 3 that have not passed through the secondary guide slots 541 are all inserted into the corresponding positioning slots 551 and enter the next secondary guide member 5. The number of secondary guide members 5, steel wire ropes 3 and suspension points in this lifting mechanism are the same, and except for one steel wire rope 3 that is bent downward and fixedly connected to the corresponding suspension point on the secondary guide member 5 closest to the crane 1, the remaining steel wire ropes 3 pass through the secondary guide member 5 and are connected to other secondary guide members 5 in sequence; the design of the positioning fixture 55 can play a positioning role for the steel wire rope 3 that does not bend downward at the secondary guide member 5, ensure that the steel wire ropes 3 do not interfere with each other, and avoid the steel wire ropes 3 from being entangled with each other, which is conducive to improving the stability of the lifting mechanism when it is working.

[0044] like Figure 1-3 As shown, main guide wheels 44 with the same number as the wire ropes 3 are arranged at lateral intervals inside the main guide member 4, and main guide grooves 441 capable of accommodating the wire ropes 3 are arranged on the outer peripheral surface of the main guide wheels 44, and the main guide wheels 44 are staggered in the longitudinal direction; the main guide member 4 includes a main mounting plate 41, a main mounting rod 42 and a main limit rod 43, and there are two main mounting plates 41 and they are symmetrically arranged front to back, and the main mounting rod 42 is installed between the two main mounting plates 41 along the lateral interval, and each main mounting rod 42 is provided with a main guide wheel 44, and the two ends of the main limit rod 43 are respectively fixedly connected to the two main mounting plates 41, and the main limit rod 43 is arranged on the upper side of the main guide wheel 44, and the gap between the main limit rod 43 and the main guide wheel 44 is smaller than the diameter of the wire rope 3.

[0045] The staggered arrangement of the main guide wheels 44 in the longitudinal direction can effectively avoid interference between the steel wire ropes 3, and the design of the main guide groove 441 can also have a good limiting effect on the steel wire rope 3. The design of the main mounting rod 42 and the main limiting rod 43 can be used to fix the two main mounting plates 41, wherein the main guide wheel 44 rotatably arranged on the main mounting rod 42 can also support and guide the steel wire rope 3, which is conducive to improving the stability and service life of the steel wire rope 3 during the lifting process; the design of the main limiting rod 43 can limit the steel wire rope 3 in the main guide groove 441, and prevent the steel wire rope 3 from slipping out of the main guide groove 441.

[0046] like Figure 1 and Figure 5As shown, the crane 1 includes a base 12, a drive motor 13, a reducer 14 and a drum 11. The drum 11 is rotatably mounted on the base 12. The reducer 14 is fixedly connected to the base 12. The drive motor 13 drives the drum 11 to rotate through the reducer 14. The leftmost main guide wheel 44 is arranged close to the main mounting plate 41 at the front side, and the rightmost main guide wheel 44 is arranged close to the main mounting plate 41 at the rear side. All the main guide wheels 44 are arranged gradually backward from left to right. The drum 11 is located directly below the main guide wheel 44 and is arranged in a left-front and right-back tilt. The drum 11 is connected to the drive motor 13 through the reducer 14, which can improve the stability of the drum 11 when rotating, making the lifting of the truss 2 more stable. The inclined drum 11 and the main guide wheels 44 that are staggered in sequence cooperate so that the wire rope 3 wound on the drum 11 can be directly connected to the corresponding main guide wheels 44 without any interlacing in the middle, which is beneficial to improving the stability of the lifting mechanism during operation. At the same time, it can also effectively improve the synchronization of the lifting and lowering of each lifting point when the lifting mechanism is working and the service life of the wire rope 3.

[0047] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope defined by the claims of the present invention.

Claims

1. A stage truss lifting mechanism, comprising a crane (1), a truss (2) and at least three steel cables (3), characterized in that: The invention comprises a main guide member (4) fixed on the top of a crane (1) and auxiliary guide members (5) having the same number as the number of steel wire ropes (3), wherein the truss (2) is located directly below the auxiliary guide members (5), a spiral groove (111) is provided on the drum (11) of the crane (1), the steel wire rope (3) is fixedly connected to the drum (11) in turn and can be wound in the spiral groove (111), an auxiliary guide wheel (54) is rotatably provided in the auxiliary guide member, an auxiliary guide groove (541) capable of accommodating the steel wire rope (3) is provided on the outer peripheral surface of the auxiliary guide wheel (54), one end of the steel wire rope (3) is fixedly connected to the drum (11), and the other end passes through the main guide member (4), the auxiliary guide member (5) and the auxiliary guide groove (541) corresponding to the auxiliary guide member (5) in turn and is fixedly connected to the truss (2), and all the auxiliary guide wheels (54) are located in the same vertical plane.

2. The lifting mechanism of a stage truss according to claim 1, characterized in that: The auxiliary guide member (5) comprises two auxiliary mounting plates (51), an auxiliary mounting rod (52), an auxiliary limiting rod (53) and an auxiliary guide wheel (54); the two auxiliary mounting plates (51) are symmetrically arranged; the lower parts of the two auxiliary mounting plates (51) are fixedly connected by two auxiliary mounting rods (52) arranged at a transverse interval, and the upper parts are connected by two auxiliary limiting rods (53) arranged at a transverse interval; the auxiliary guide wheel (54) is installed on the auxiliary mounting rod (52) at a side away from the crane (1); and the auxiliary guide wheel (54) is arranged close to the auxiliary mounting plate (51) at the front side.

3. The lifting mechanism of a stage truss according to claim 2, characterized in that: A cylindrical positioning clamp (55) is sleeved on the auxiliary mounting rod (52) on the side of the auxiliary guide member (5) close to the crane (1), and a plurality of positioning slide grooves (551) are arranged at intervals along the axial direction of the auxiliary mounting rod (52) on the outer peripheral surface of the positioning clamp (55). The positioning clamp (55) is arranged close to the auxiliary mounting plate (51) on the rear side, and the steel wire rope (3) that has not passed through the auxiliary guide groove (541) is inserted into the corresponding positioning slide groove (551) and enters the next auxiliary guide member (5).

4. The lifting mechanism of a stage truss according to claim 3, characterized in that: The auxiliary guide member (5) also includes a connecting rod (56), which is longitudinally mounted on the front part of the auxiliary mounting plate (51), and the connecting rod (56) is arranged close to the auxiliary guide wheel (54), and the gap between the connecting rod (56) and the outer peripheral surface of the auxiliary guide wheel (54) is smaller than the diameter of the wire rope (3).

5. The lifting mechanism of a stage truss according to claim 3, characterized in that: The two auxiliary mounting rods (52) are located on the same horizontal plane, the two auxiliary limiting rods (53) are located on the same horizontal plane, one of the auxiliary limiting rods (53) is arranged close to the auxiliary guide wheel (54), and the gap between the auxiliary limiting rod (53) and the upper edge of the auxiliary guide wheel (54) is smaller than the diameter of the steel wire rope (3).

6. The lifting mechanism of a stage truss according to claim 2, characterized in that: The lower end of the auxiliary mounting plate (51) is bent outward to form a connecting portion (511), and the connecting portion (511) is fixedly connected to a mounting frame (6) above the stage via a fastener.

7. A stage truss lifting mechanism according to any one of claims 1 to 6, characterized in that: The main guide wheel (44) is arranged in a transverse interval inside the main guide member (4) with the same number as the steel wire ropes (3). The outer peripheral surface of the main guide wheel (44) is provided with a main guide groove (441) capable of accommodating the steel wire ropes (3). The main guide wheels (44) are staggered in the longitudinal direction.

8. The lifting mechanism of a stage truss according to claim 7, characterized in that: The main guide member (4) comprises a main mounting plate (41), a main mounting rod (42) and a main limiting rod (43). The main mounting plates (41) have two and are symmetrically arranged front and back. The main mounting rod (42) is installed between the two main mounting plates (41) along a lateral interval. A main guide wheel (44) is arranged on each main mounting rod (42). The two ends of the main limiting rod (43) are respectively fixedly connected to the two main mounting plates (41). The main limiting rod (43) is arranged on the upper side of the main guide wheel (44). The gap between the main limiting rod (43) and the main guide wheel (44) is smaller than the diameter of the wire rope (3).

9. The lifting mechanism of a stage truss according to claim 8, characterized in that: The crane (1) comprises a base (12), a driving motor (13), a reducer (14) and a drum (11); the drum (11) is rotatably mounted on the base (12); the reducer (14) is fixedly connected to the base (12); and the driving motor (13) drives the drum (11) to rotate via the reducer (14).

10. The lifting mechanism of a stage truss according to claim 9, characterized in that: The leftmost main guide wheel (44) is arranged close to the main mounting plate (41) at the front side, and the rightmost main guide wheel (44) is arranged close to the main mounting plate (41) at the rear side. All main guide wheels (44) are arranged gradually backward from left to right. The reel (11) is located directly below the main guide wheels (44) and is arranged in a tilted manner with the left front and the right rear.

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