Overload self-protection mechanism for stage equipment

Abstract

The invention discloses a stage equipment overload self-protection mechanism, and relates to the technical field of stage equipment load bearing overload self-protection. The stage equipment overload self-protection mechanism comprises a frame body, a frame groove is formed in the middle of the frame body, a penetrating groove is formed in the upper end of the frame groove, through grooves are formed in the two sides of the frame body, a groove is formed in the upper side of the frame groove, a sliding plate is slidably connected to the inner wall of the frame groove, a clamping groove is formed in the middle of the sliding plate, and a shear pin is arranged on the inner wall of the clamping groove. A table top is fixed to the upper end of the sliding plate. According to the overload self-protection mechanism for the stage equipment, when the weight borne by the stage surface exceeds the preset safety threshold value, on one hand, the precise protection effect is achieved, the effect of improving the using effect of the protection mechanism is achieved, on the other hand, the reinforcing and supporting effect is achieved, and the effect of improving the using stability of the protection mechanism is achieved; and on the other hand, the evacuation effect is guaranteed, and the effect of improving the guarantee performance of the protection mechanism is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of stage equipment load overload self-protection, in particular to a stage equipment overload self-protection mechanism. BACKGROUND

[0002] In the complex system of modern stage performance, the stage as a whole is the core load-bearing carrier, and its safe operation is of great importance to the safety of the performers and the smooth progress of the performance. This "load-bearing core" not only needs to cope with the dynamic movement of actors and the static display of multi-level props in regular performances, but also needs to bear the instantaneous heavy pressure in special scenes such as group dance synchronized jumping and heavy mechanical device instantaneous landing. Such pressure often comes with impact force, shear force and other complex mechanical effects, which poses a severe test to the stability of the stage structure. Therefore, it is necessary to equip the stage with a load overload self-protection mechanism to build a proactive defense safety barrier, which is an indispensable key link in the modern stage safety system.

[0003] In the current stage equipment safety protection system, the core means of load overload protection is still dominated by mechanical limiting devices. These devices generally rely on the elastic deformation of springs and the mechanical engagement of buckles to achieve protection functions. When the load carried by the equipment gradually rises to the preset threshold, the extension amount of the spring or the engagement state of the buckle will change suddenly, triggering a rigid locking mechanism to forcibly stop the operation or displacement of the equipment, thereby avoiding structural damage or safety accidents caused by overload. However, this mechanical protection mode has many limitations that are difficult to avoid in practical application. In terms of response accuracy, the physical properties of mechanical structures determine that there is a natural lag in the perception of load changes. The fatigue of the spring will change the elastic coefficient with the increase of the number of uses, and the wear of the buckle will cause the engagement gap to become larger. These factors will cause the trigger threshold to deviate, often triggering protection only when the load exceeds the safe range by a certain amount, making it difficult to achieve precise protection and thus affecting the effectiveness of the protection mechanism.

[0004] Therefore, it is necessary to invent a stage equipment overload self-protection mechanism to solve the above problems. SUMMARY

[0005] The purpose of the present application is to provide a stage equipment overload self-protection mechanism to solve the problems raised in the background art.

[0006] To solve the above technical problems, the present application provides the following technical scheme: a stage equipment overload self-protection mechanism, comprising a frame body, a frame slot is formed in the middle of the frame body, a through slot is formed in the upper end of the frame slot, a through slot is formed in both sides of the frame body, a recess is formed in the upper side of the frame slot, a sliding plate is slidably connected to the inner wall of the frame slot, a clamping groove is formed in the middle of the sliding plate, a shear pin is arranged on the inner wall of the clamping groove, a table top is fixed to the upper end of the sliding plate, a plurality of support frames are fixed to the lower side of the sliding plate, a support disc is fixed to the lower end of each support frame, a stabilizing seat is slidably connected to the outer surface of each support disc, a stabilizing groove is formed in the middle of each stabilizing seat, a limiting groove is formed in the four sides of each stabilizing groove, and a first spring is fixed to the lower end of each support disc.

[0007] A plurality of upper sliding grooves are formed in the lower side of the sliding plate, a plurality of lower sliding grooves are formed in the lower end of the frame slot, a connecting structure is provided on the four sides of each support disc, and four support rods are arranged on the connecting structure.

[0008] Preferably, the connecting structure comprises four fixed blocks, a connecting frame is rotatably connected to the other end of each of the four fixed blocks, a connecting block is rotatably connected to the other end of each of the four connecting frames, a first sliding block is fixed to the other end of each of the four connecting blocks, a support rod is fixed to the upper end of each of the four first sliding blocks, a rod groove is formed in the middle of each of the four support rods, a sliding disc is slidably connected to the inner wall of each of the four rod grooves, a second spring is fixed to the lower end of each of the four sliding discs, a connecting rod is fixed to the upper end of each of the four sliding discs, and a second sliding block is fixed to the upper end of each of the four connecting rods.

[0009] Preferably, one end of each of the fixed blocks is fixed to one side of each of the support discs, the other end of each of the fixed blocks is rotatably connected to the upper end of each of the connecting frames, the outer surface of each of the fixed blocks is slidably connected to the inner wall of each of the limiting grooves, the lower end of each of the connecting frames is rotatably connected to one end of each of the connecting blocks, the other end of each of the connecting blocks is fixed to one side of each of the first sliding blocks, the outer surface of each of the first sliding blocks is slidably connected to the inner wall of each of the lower sliding grooves, and the vertical section of each of the first sliding blocks is T-shaped.

[0010] Preferably, the upper end of each of the first sliding blocks is fixed to the lower end of each of the support rods, each of the rod grooves penetrates the middle of each of the support rods, the outer surface of each of the sliding discs is slidably connected to the inner wall of each of the rod grooves, the transverse section of each of the sliding discs is circular, the lower end of each of the sliding discs is fixed to the upper end of each of the second springs, and the lower end of each of the second springs is fixed to the inner wall of the lower end of each of the rod grooves.

[0011] Preferably, each sliding disc upper end is fixed to each connecting rod lower end, each connecting rod upper end is fixed to each second sliding block lower end middle, each second sliding block outer surface is slidingly connected to each upper sliding groove inner wall, and each second sliding block vertical section is T-shaped.

[0012] Preferably, the shear pin outer surface is in contact with the groove inner wall, the shear pin outer surface is in contact with the clamping groove inner wall, the sliding plate outer surface is slidingly connected to the frame groove inner wall, and the table top outer surface is slidingly connected to the through groove inner wall.

[0013] Preferably, each support frame upper end is fixed to the sliding plate lower side, each support frame lower end is fixed to each support disc upper end, each support disc outer surface is slidingly connected to each stabilizing groove inner wall, each support disc lower end is fixed to each first spring upper end, each first spring lower end is fixed to each stabilizing groove lower end inner wall, and each stabilizing groove penetrates the stabilizing seat upper side, and the stabilizing seat lower end is fixed to the frame groove lower end inner wall.

[0014] Preferably, the frame groove two sides are provided with two placement grooves, the sliding plate two sides are fixed with two first gear racks, each adjacent two first gear racks are meshingly connected with a gear, two gears are meshingly connected with a second gear rack, each second gear rack lower end is fixed with a step, and each step two sides are provided with a receiving groove.

[0015] Preferably, each adjacent two first gear rack upper ends are fixed to the sliding plate one side, each first gear rack outer surface is slidingly connected to each placement groove inner wall, each first gear rack is meshingly connected with each gear one side, and each gear outer surface is rotatably connected to the through groove inner wall.

[0016] Preferably, two gears are meshingly connected with two second gear racks, each second gear rack is staggered with two adjacent first gear racks, each second gear rack one side is fixed to each step upper side, two step outer surfaces are slidingly connected to two through groove inner walls, and each through groove section is convexly arranged.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] (1) When the weight borne by the table top exceeds the preset safety threshold, the recess, the sliding plate, the clamping groove, the shear pin, the table top, the support frame, the support disc, the stabilizing seat, and the stabilizing groove are cooperatively operated to achieve the effect of precise protection, which not only ensures the accuracy and timeliness of the protection action, but also realizes the stable dissipation of overload energy through staged force unloading, effectively improves the reliability and safety of the protection mechanism, perfectly adapts to the core needs of stage equipment for precise protection and stable operation, and thus improves the use effect of the protection mechanism.

[0019] (2) When the weight carried by the table exceeds a preset safety threshold, the present invention enables the limiting groove, the first spring, the fixed block, the connecting frame, the connecting block, the first slider, the support rod, the rod groove, the sliding plate, the second spring, the connecting rod, the second slider, the upper slide groove, and the lower slide groove to cooperate with each other to achieve the effect of reinforcing the support, effectively dispersing the load and reducing local stress, thereby achieving the effect of improving the stability of the protective mechanism;

[0020] (3) When the weight carried by the table exceeds a preset safety threshold, the placement slot, the first rack, the gear, the second rack, the step, and the storage slot cooperate with each other to achieve the effect of ensuring evacuation and provide support for the evacuation of actors, thereby achieving the effect of improving the protection performance of the protection mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is the overall structural diagram of the present invention;

[0022] Figure 2 is a cross-sectional view of the frame of the present invention;

[0023] Figure 3 For the present invention Figure 2 A magnified view of the structure of the middle part A;

[0024] Figure 4 It is a schematic diagram of the frame structure of the present invention;

[0025] Figure 5 is a cross-sectional view of a stabilizing seat of the present invention;

[0026] Figure 6 For the present invention Figure 5 A magnified view of the structure of the middle B section;

[0027] Figure 7 This is a schematic diagram of the structure of the stabilizing seat of the present invention;

[0028] Figure 8 is a step cross-sectional view of the present invention;

[0029] Figure 9 For the present invention Figure 8 Enlarged view of the structure of part C in the middle.

[0030] In the figure: 1. frame; 2. frame groove; 3. through groove; 4. through groove; 5. groove; 6. slide plate; 7. slot; 8. shear pin; 9. table; 10. support frame; 11. support plate; 12. stabilizing seat; 13. stabilizing groove; 14. limiting groove; 15. first spring; 16. fixing block; 17. connecting frame; 18. connecting block; 19. first slider; 20. support rod; 21. rod groove; 22. sliding plate; 23. second spring; 24. connecting rod; 25. second slider; 26. upper slide groove; 27. lower slide groove; 28. placement groove; 29. ​​first rack; 30. gear; 31. second rack; 32. step; 33. storage groove. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] Example 1

[0033] This embodiment provides a stage equipment overload self-protection mechanism;

[0034] See also Figure 1 - Figure 9 As shown, it includes a frame body 1, a frame groove 2 is opened in the middle of the frame body 1, a through groove 3 is opened at the upper end of the frame groove 2, through grooves 4 are opened on both sides of the frame body 1, a groove 5 is opened on the upper side of the frame groove 2, a slide plate 6 is slidably connected to the inner wall of the frame groove 2, a card slot 7 is opened in the middle of the slide plate 6, a shear pin 8 is provided on the inner wall of the card slot 7, a table 9 is fixed to the upper end of the slide plate 6, and a plurality of support frames 10 are fixed to the lower side of the slide plate 6, a support plate 11 is fixed to the lower end of each support frame 10, and a stabilizing seat 12 is slidably connected to the outer surface of each support plate 11, a stabilizing groove 13 is opened in the middle of each stabilizing seat 12, and a limiting groove 14 is opened on the four sides of each stabilizing groove 13, and a first elastic member is fixed to the lower end of each support plate 11. Spring 15, the outer surface of the shear pin 8 is in contact with the inner wall of the groove 5, the outer surface of the shear pin 8 is in contact with the inner wall of the card slot 7, the outer surface of the slide plate 6 is slidably connected to the inner wall of the frame groove 2, the outer surface of the table 9 is slidably connected to the inner wall of the through groove 3, the upper end of each support frame 10 is fixed to the lower side of the slide plate 6, the lower end of each support frame 10 is fixed to the upper end of each support plate 11, the outer surface of each support plate 11 is slidably connected to the inner wall of each stable groove 13, the lower end of each support plate 11 is fixed to the upper end of each first spring 15, the lower end of each first spring 15 is fixed to the inner wall of the lower end of each stable groove 13, each stable groove 13 runs through the upper side of the stable seat 12, and the lower end of the stable seat 12 is fixed to the inner wall of the lower end of the frame groove 2;

[0035] The frame 1 adopts an openable design, and a hinge connection and a buckle locking structure are arranged on the side. When the shear pin 8 is broken due to overload, the frame 1 can be quickly opened to expose the connection part, and a new shear pin 8 can be directly replaced without disassembling the entire stage structure, greatly shortening the maintenance time, ensuring that the stage can be restored to use in a short time, and meeting the repeated performance requirements. The shear pin 8 is made of a specific strength alloy material, such as a customized low-carbon alloy steel, which has precise rigidity parameters. Within the normal load range, it can stably bear the shear force transmitted by the stage surface 9 without exceeding the preset safety threshold, firmly connecting the stage surface 9 and the support structure, and ensuring the overall rigidity of the stage. When the load exceeds the preset bearing threshold, the shear pin 8 will precisely break at the designed weak section, such as the middle annular fracture groove, and the fracture surface is smooth without burrs, avoiding jamming and subsequent actions. This fracture will trigger a series of progressive protection actions: first, the shear pin 8 breaks to trigger the first level, releasing the rigid connection between the stage surface 9 and the initial support; then, the stage surface 9 is compressed during the downward movement, and the second level of buffer is completed through the elastic deformation of the spring, absorbing the overload impact energy and reducing the instantaneous acceleration of the stage surface 9 downward movement; then, the spring buffer drives the support rod 20 to expand, forming a multi-directional dispersed rigid support network, achieving the third level of reinforcement, and dispersing the concentrated load to a larger range; finally, the mechanical linkage makes the steps 32 slide out of the frame 1, building a safe evacuation channel, and realizing the fourth level of protection. These four stages of actions are closely linked, from the initial structural overload response, to the intermediate energy buffer and structural reinforcement, to the final personnel evacuation protection, forming a complete protection closed loop covering "structure protection-energy buffer-load dispersion-personnel safety", and comprehensively improving the safety and reliability of the stage under overload.

[0036] The specific implementation process is as follows: when the weight borne by the stage surface 9 exceeds the preset safety threshold, the entire overload protection mechanism will start the precise protection process in sequence. The sliding plate 6 rigidly connected with the stage surface 9 will stably move downward along the vertical direction under the limiting action of the inner wall of the frame groove 2. The inner wall of the frame groove 2 is precisely machined to ensure that the downward track of the sliding plate 6 always remains vertical, avoiding triggering delay or jamming due to deviation;

[0037] As the slide plate 6 moves downward, the wedge-shaped clamping groove 7 on its side gradually approaches the pre-set groove 5 on the upper inner wall of the frame groove 2, and the enclosed space formed by the two encloses the shear pin 8. When the slide plate 6 continues to move downward to a certain position, the inclined inner wall of the clamping groove 7 and the right-angle edge of the groove 5 will form a two-way extrusion on the shear pin 8: the downward force of the clamping groove 7 and the reverse support force of the groove 5 act on the shear pin 8, making it instantaneously bear a load exceeding the shear strength, and finally brittle fracture. This fracture process of the shear pin 8 constitutes the first trigger of the protection mechanism, which quickly converts the overload signal into a mechanical action through destructive failure of the physical structure, ensuring the timeliness and accuracy of the trigger. Compared with traditional mechanical limiting devices, the fracture threshold of the shear pin 8 is precisely controlled by material properties and geometric dimensions, and is minimally affected by vibration and wear, avoiding the risk of false triggering or failure from the source;

[0038] After the shear pin 8 breaks, the slide plate 6 loses its limiting constraint and continues to move smoothly downward under the guidance of the frame groove 2. At this time, the several support frames 10 fixed on the lower side of the slide plate 6 will simultaneously drive the support disc 11 connected at the lower end to move vertically along the stable groove 13 in the middle of the stable seat 12. The inner wall of the stable groove 13 is inlaid with a wear-resistant bushing, which not only reduces the frictional resistance when the support disc 11 moves downward, but also prevents lateral shaking through close fitting, ensuring the stability of the buffering process. As the support disc 11 moves downward, the first spring 15 fixed at its lower end will be gradually compressed: the helical structure of the first spring 15 converts the axial pressure into elastic potential energy, continuously absorbing overload energy through the deformation process, forming a secondary buffer. The elastic coefficient of the first spring 15 is accurately calculated, making its compression amount and bearing pressure have a linear correspondence, which can quickly offset the impact force in the early stage of overload and maintain a stable buffering force in the later stage, avoiding secondary damage to the equipment structure caused by rigid collision;

[0039] It is worth noting that the initial stability of the table 9 is entirely dependent on the rigid constraint of the shear pin 8: in the conventional performance scenario, the shear pin 8, through its close fit with the table 9 and the frame, firmly locks the actor's weight, prop pressure and other loads borne by the table 9 in the preset position, and its shear strength is precisely matched to stably cope with various dynamic and static loads in daily use, ensuring that the table 9 does not displace at all, providing solid foundation support for the performance. The first spring 15 is in a "silent standby" state at this stage and does not participate in load sharing or affect the stability of the table 9, but only enters the working sequence after the shear pin 8 breaks, specifically to bear the buffering function when the load exceeds the threshold. More importantly, the spring force parameter of the first spring 15 is strictly calculated, and its elastic limit is controlled within a certain range: when the table 9 is compressed, the spring will release a moderate reverse spring force to offset part of the impact energy and prevent the table 9 from falling rapidly. However, due to the limited spring force, which is much smaller than the total weight of the table 9 and the loads it carries, the spring cannot push the table 9 back after buffering is complete, ensuring that the table 9 can stably stay in the position after moving down and will not shake or displace due to rebound, providing a stable mechanical foundation for the unfolding of the support rod 20, the sliding out of the steps 32, and other protective actions, fundamentally ensuring the reliability of the subsequent operation of the entire protection mechanism.

[0040] This "one-level triggering plus two-level buffering" composite protection mode precisely controls the whole process from overload detection to energy dissipation, achieves the effect of precise protection, ensures the accuracy and timeliness of the protection action, and realizes the stable dissipation of overload energy through staged unloading, effectively improving the reliability and safety of the protection mechanism, perfectly adapting to the core needs of stage equipment for precise protection and stable operation, and thus achieving the effect of improving the use effect of the protection mechanism.

[0041] Embodiment Two

[0042] Existing stages usually rely on fixed-position support columns to bear loads. Since the support column positions are fixed, the support points are concentrated, which can easily lead to excessive load concentration and thus generate large local stresses. Therefore, a structure that can automatically adjust the position of the support points is needed to adjust the distribution of the support points during overload protection to achieve reinforced support, thereby dispersing the concentrated load and reducing local stress.

[0043] Please refer to Figure 1 - Figure 9 which adds the function of reinforced support based on embodiment one;

[0044] Please refer again to Figure 1 - Figure 9As shown, the lower side of the sliding plate 6 is provided with a plurality of upper sliding grooves 26, and the lower end of the frame groove 2 is provided with a plurality of lower sliding grooves 27. Each support disc 11 is provided with a connecting structure on four sides. The connecting structure comprises four fixed blocks 16, the other end of each fixed block 16 is rotatably connected with a connecting frame 17, the other end of each connecting frame 17 is rotatably connected with a connecting block 18, the other end of each connecting block 18 is fixedly connected with a first sliding block 19, the upper end of each first sliding block 19 is fixedly connected with a support rod 20, the middle part of each support rod 20 is provided with a rod groove 21, the inner wall of each rod groove 21 is slidably connected with a sliding disc 22, the lower end of each sliding disc 22 is fixedly connected with a second spring 23, the upper end of each sliding disc 22 is fixedly connected with a connecting rod 24, and the upper end of each connecting rod 24 is fixedly connected with a second sliding block 25.

[0045] Please refer again to Figure 1 - Figure 9 As shown, one end of each fixed block 16 is fixed on one side of each support disc 11, the other end of each fixed block 16 is rotatably connected to the upper end of each connecting frame 17, the outer surface of each fixed block 16 is slidably connected to the inner wall of each limiting groove 14, the lower end of each connecting frame 17 is rotatably connected to one end of each connecting block 18, the other end of each connecting block 18 is fixed on one side of each first sliding block 19, the outer surface of each first sliding block 19 is slidably connected to the inner wall of each lower sliding groove 27, the vertical section of each first sliding block 19 is T-shaped, the upper end of each first sliding block 19 is fixed to the lower end of each support rod 20, each rod groove 21 penetrates through the middle part of each support rod 20, the outer surface of each sliding disc 22 is slidably connected to the inner wall of each rod groove 21, the horizontal section of each sliding disc 22 is circular, the lower end of each sliding disc 22 is fixed to the upper end of each second spring 23, the lower end of each second spring 23 is fixed to the inner wall of the lower end of each rod groove 21, the upper end of each connecting rod 24 is fixed to the lower end of each second sliding block 25, and the outer surface of each second sliding block 25 is slidably connected to the inner wall of each upper sliding groove 26. The vertical section of each second sliding block 25 is T-shaped.

[0046] The specific implementation process is as follows: when the weight borne by the table top 9 exceeds the preset safety threshold, the table top 9 will drive the connected sliding plate 6 to move downward synchronously; the downward moving sliding plate 6 drives the support disc 11 connected thereto to move downward by fixing the support frame 10 connected thereto; when the support disc 11 moves downward, the fixed block 16 fixed around the support disc 11 will slide in the vertical direction in the limiting groove 14 opened on the side of the stabilizing seat 12; the downward moving fixed block 16 drives the connecting block 18 rotatably connected to the other end of the connecting frame 17 to move synchronously through the connecting frame 17 connected thereto, thereby pushing the first sliding block 19 connected to the other end of the connecting block 18 to slide horizontally in the lower sliding groove 27;

[0047] The sliding first slider 19 drives the support rod 20 fixed at its upper end to move horizontally in sync; since the support rod 20 has a rod groove 21 in the middle, its movement drives the sliding plate 22 slidably connected to the inner wall of the rod groove 21 to move accordingly; when the sliding plate 22 moves, it drives the connecting rod 24 fixed in the middle to move synchronously, thereby causing the second slider 25 fixed at the upper end of the connecting rod 24 to slide horizontally in the upper sliding groove 26 provided on the lower side of the slide plate 6;

[0048] At the same time, the downward movement of the slide plate 6 compresses the second spring 23 fixed to its lower end by driving the sliding plate 22 through the second slider 25 and connecting rod 24. During this process, the elastic deformation of the second spring 23 cushions the downward movement, while the synchronous deployment of the support rod 20, sliding plate 22, and other structures forms multiple groups of dispersed support points. Ultimately, the synergistic effect of "buffering energy absorption" and "dense support" achieves a reinforced support effect, effectively distributing the load and reducing local stress, thereby improving the operational stability of the protective mechanism.

[0049] Example 3

[0050] When the stage is overloaded, there is a large height difference between the stage and the supporting surface below, which will cause the actors to fall during the evacuation path. Therefore, it is necessary to add a footrest structure to the evacuation path to provide stable stepping support and eliminate safety hazards during the evacuation process, thereby improving the comprehensive protection performance of the overload protection mechanism.

[0051] See also Figure 1 - Figure 9 As shown, the function of ensuring evacuation is added on the basis of embodiment 1;

[0052] Please refer again Figure 1 - Figure 9 As shown, two placement slots 28 are provided on both sides of the frame slot 2, and two first racks 29 are fixed on both sides of the slide plate 6, and each adjacent two first racks 29 are meshed with a gear 30, and the two gears 30 are meshed with a second rack 31, and a step 32 is fixed to the lower end of each second rack 31, and a storage slot 33 is provided on both sides of each step 32. The upper end of each adjacent two first racks 29 is fixed to one side of the slide plate 6, and the outer surface of each first rack 29 is slidably connected to the inner wall of each placement slot 28, and each first rack 29 is meshed with one side of each gear 30, and the outer surface of each gear 30 is rotatably connected to the inner wall of the through slot 4, and the two gears 30 are meshed with the two second racks 31, and each second rack 31 is staggered with the two adjacent first racks 29, and one side of each second rack 31 is fixed on the upper side of each step 32, and the outer surfaces of the two steps 32 are slidably connected to the inner walls of the two through slots 4, and the cross-section of each through slot 4 is convex.

[0053] The specific implementation process is as follows: when the weight carried by the table 9 exceeds the preset safety threshold, the table 9 will drive the connected slide 6 to move downward synchronously; the downward moving slide 6 will drive the first racks 29 fixed on both sides to move downward, and the first racks 29 will slide down in a directional manner in the placement groove 28 provided in the frame groove 2. The descending first rack 29 drives the gear 30 engaged with it to rotate, and the gear 30 rotates stably in the through groove 4. At the same time, the downward moving first rack 29 enters the storage groove 33 provided in the step 32;

[0054] The stably rotating gear 30 drives the second rack 31 meshing with it to move, and the moving second rack 31 drives the fixed step 32 to slide in the through groove 4. The sliding step 32 can slide out of the through groove 4 of the frame 1. The sliding step 32 can provide an evacuation channel for the actors, achieve the effect of ensuring evacuation, provide support for the evacuation of the actors, and thus achieve the effect of improving the protection performance of the protection mechanism.

[0055] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A stage equipment overload self-protection mechanism, comprising a frame (1), characterized in that: The frame body (1) is provided with a frame groove (2) in the middle, a through groove (3) is provided at the upper end of the frame groove (2), through grooves (4) are provided on both sides of the frame body (1), a groove (5) is provided on the upper side of the frame groove (2), a slide plate (6) is slidably connected to the inner wall of the frame groove (2), a clamping groove (7) is provided in the middle of the slide plate (6), a shear pin (8) is provided on the inner wall of the clamping groove (7), a table (9) is fixed to the upper end of the slide plate (6), a plurality of support frames (10) are fixed to the lower side of the slide plate (6), a support plate (11) is fixed to the lower end of each support frame (10), the outer surface of each support plate (11) is slidably connected to a stabilizing seat (12), a stabilizing groove (13) is provided in the middle of each stabilizing seat (12), and limiting grooves (14) are provided on four sides of each stabilizing groove (13), and a first spring (15) is fixed to the lower end of each support plate (11); The lower side of the slide plate (6) is provided with a plurality of upper slide grooves (26), the lower end of the frame groove (2) is provided with a plurality of lower slide grooves (27), and each of the support plates (11) is provided with a connecting structure on four sides, and four support rods (20) are provided on the connecting structure; the connecting structure can carry the four support rods (20) to move in the opposite direction along the length direction of the four lower slide grooves (27) to densely support the table top (9) and disperse the load to reduce local stress.

2. The stage equipment overload self-protection mechanism according to claim 1, characterized in that: The connecting structure comprises four fixed blocks (16), the other ends of the four fixed blocks (16) are rotatably connected to a connecting frame (17), the other ends of the four connecting frames (17) are rotatably connected to a connecting block (18), the other ends of the four connecting blocks (18) are fixed with a first slider (19), the upper ends of the four first sliders (19) are fixed with a support rod (20), the middle parts of the four support rods (20) are provided with a rod groove (21), the inner walls of the four rod grooves (21) are slidably connected to a sliding disk (22), the lower ends of the four sliding disks (22) are fixed with a second spring (23), the upper ends of the four sliding disks (22) are fixed with a connecting rod (24), and the upper ends of the four connecting rods (24) are fixed with a second slider (25).

3. The stage equipment overload self-protection mechanism according to claim 2, characterized in that: One end of each fixed block (16) is fixed to one side of each support plate (11), the other end of each fixed block (16) is rotatably connected to the upper end of each connecting frame (17), the outer surface of each fixed block (16) is slidably connected to the inner wall of each limiting groove (14), the lower end of each connecting frame (17) is rotatably connected to one end of each connecting block (18), the other end of each connecting block (18) is fixed to one side of each first slider (19), the outer surface of each first slider (19) is slidably connected to the inner wall of each lower groove (27), and the vertical section of each first slider (19) is T-shaped.

4. The stage equipment overload self-protection mechanism according to claim 2, characterized in that: The upper end of each first slider (19) is fixed to the lower end of each support rod (20), each rod groove (21) runs through the middle of each support rod (20), the outer surface of each sliding plate (22) is slidably connected to the inner wall of each rod groove (21), and the cross-section of each sliding plate (22) is circular. The lower end of each sliding plate (22) is fixed to the upper end of each second spring (23), and the lower end of each second spring (23) is fixed to the inner wall of the lower end of each rod groove (21).

5. The stage equipment overload self-protection mechanism according to claim 2, characterized in that: The upper end of each sliding plate (22) is fixed to the lower end of each connecting rod (24), the upper end of each connecting rod (24) is fixed to the middle of the lower end of each second slider (25), the outer surface of each second slider (25) is slidably connected to the inner wall of each upper sliding groove (26), and the vertical section of each second slider (25) is T-shaped.

6. The stage equipment overload self-protection mechanism according to claim 1, characterized in that: The outer surface of the shear pin (8) contacts the inner wall of the groove (5), the outer surface of the shear pin (8) contacts the inner wall of the clamping groove (7), the outer surface of the slide plate (6) is slidably connected to the inner wall of the frame groove (2), and the outer surface of the table (9) is slidably connected to the inner wall of the through groove (3).

7. The stage equipment overload self-protection mechanism according to claim 1, characterized in that: The upper end of each support frame (10) is fixed to the lower side of the slide (6), the lower end of each support frame (10) is fixed to the upper end of each support plate (11), the outer surface of each support plate (11) is slidably connected to the inner wall of each stable groove (13), the lower end of each support plate (11) is fixed to the upper end of each first spring (15), the lower end of each first spring (15) is fixed to the inner wall of the lower end of each stable groove (13), each stable groove (13) passes through the upper side of the stable seat (12), and the lower end of the stable seat (12) is fixed to the inner wall of the lower end of the frame groove (2).

8. The stage equipment overload self-protection mechanism according to claim 1, characterized in that: Two placement grooves (28) are provided on both sides of the frame groove (2), two first racks (29) are fixed on both sides of the slide plate (6), each two adjacent first racks (29) are meshedly connected with a gear (30), and the two gears (30) are meshedly connected with a second rack (31), and a step (32) is fixed at the lower end of each second rack (31), and each step (32) is provided with a receiving groove (33) on both sides.

9. The stage equipment overload self-protection mechanism according to claim 8, characterized in that: The upper ends of each two adjacent first racks (29) are fixed to one side of the slide (6), the outer surface of each first rack (29) is slidably connected to the inner wall of each placement groove (28), each first rack (29) is meshed and connected to one side of each gear (30), and the outer surface of each gear (30) is rotatably connected to the inner wall of the through groove (4).

10. The stage equipment overload self-protection mechanism according to claim 8, characterized in that: The two gears (30) are meshed and connected with the two second racks (31), and each of the second racks (31) is staggered with the two adjacent first racks (29). One side of each of the second racks (31) is fixed on the upper side of each step (32). The outer surfaces of the two steps (32) are slidably connected to the inner walls of the two through grooves (4), and the cross section of each through groove (4) is convex.

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