A lifting platform

Abstract

The present invention discloses a lifting platform, which relates to the technical field of stage mechanical performances; it includes a motor mounting seat, a drive motor, a table panel, two reduction connection structures, four scissor brace mounting seats and four scissor brace structures, wherein the motor mounting seat is horizontally arranged, a primary reducer is provided on the motor mounting seat, the drive motor is transmission-connected to the primary reducer, two reduction connection structures are symmetrically arranged at both ends of the primary reducer, two reduction connection structures are transmission-connected to the primary reducer, four scissor brace mounting seats are arranged at equal intervals, four scissor brace structures are rotationally connected to the four scissor brace mounting seats, the table panel is horizontally arranged on the top of the four scissor brace structures, the table panel is rotationally connected to the four scissor brace structures, and two reduction connection structures are fixedly connected to the four scissor brace structures. The present invention realizes lifting and lowering through the transmission components of the U-shaped and scissor brace arms, and has a high overall cost performance.

Description

Technical Field

[0001] The present invention relates to the technical field of stage performance mechanical equipment, and particularly to a lift table. Background Art

[0002] In order to be able to undertake the requirements of various high-level operas, ballets, traditional dramas, folk arts, and dramas at home and abroad, and meet the use requirements of large-scale variety shows, chorus performances, group photos, etc. The lift table will become an indispensable under-stage equipment for modern performing arts stages. Existing lift tables mostly adopt a transmission structure of hydraulic + scissor lift and rigid chain lift. The former relies on pressure holding for positioning at the parking position, and the hydraulic oil is greatly affected by temperature changes. When multiple lift tables are lifted synchronously, the synchronization accuracy and positioning accuracy are poor, which is not convenient for coordinated use; in short-stroke lift tables and lift choirs, the latter has a high manufacturing cost. Summary of the Invention

[0003] The present invention provides a lift table to solve the above technical problems.

[0004] The present invention provides a lift table, including a motor mounting base, a driving motor, a table top plate, two reduction connection structures, four scissor support mounting seats, and four scissor support structures. The motor mounting base is horizontally arranged, and a primary speed reducer is provided on the motor mounting base. The driving motor is drivingly connected to the primary speed reducer. The two reduction connection structures are symmetrically arranged at both ends of the primary speed reducer, and the two reduction connection structures are drivingly connected to the primary speed reducer. The four scissor support mounting seats are arranged at equal intervals, and the four scissor support structures are respectively rotatably connected to the four scissor support mounting seats. The table top plate is horizontally arranged on the tops of the four scissor support structures, and the table top plate is rotatably connected to the four scissor support structures. The two reduction connection structures are respectively fixedly connected to the four scissor support structures.

[0005] Further, each of the reduction connection structures includes a transition shaft, a coupling, two U-shaped pull rods, and two secondary speed reducers. The two rack guide seats are symmetrically arranged at both ends of the primary speed reducer. A speed reducer mounting seat is provided on the motor mounting base. One of the secondary speed reducers is arranged on the speed reducer mounting seat and is drivingly connected to the primary speed reducer through the transition shaft. The other secondary speed reducer is arranged on the motor mounting base and is drivingly connected to the primary speed reducer through the coupling. Each of the secondary speed reducers is provided with two gears drivingly connected thereto. A rack meshing with the gear is provided at the bottom of the gear. The speed reducer mounting seat and the motor mounting base are both provided with rack guide seats for carrying the movement of the rack.

[0006] Furthermore, each cross-bracing structure includes two connecting shafts and two groups of cross-bracing arms. The two groups of cross-bracing arms 27 are rotationally connected by the two connecting shafts. The bottom of each group of cross-bracing arms is rotationally connected to a cross-bracing mounting seat. Two traveling wheels are provided on each group of cross-bracing arms. The two traveling wheels are respectively rotationally connected to the top and bottom of the cross-bracing arm. A guiding groove for the traveling wheel located at the top to move is provided at the bottom of the table top plate. Two symmetrically arranged limiting plates are provided on the cross-bracing mounting seat. A guiding side plate is provided beside the two limiting plates. A moving space is formed between the guiding side plate and the limiting plates. A bearing beam slidably engaged with the two limiting plates is provided between the two limiting plates. The two traveling wheels located at the bottom of the cross-bracing structure are respectively rotationally connected to the two ends of the bearing beam. The two traveling wheels located at the bottom of the cross-bracing structure rotate between the two moving gaps.

[0007] Furthermore, the end of each rack is connected to a U-shaped pull rod. An O-shaped pull rod is provided at the tail end of the U-shaped pull rod. A tensioner is provided between the O-shaped pull rod and the U-shaped pull rod. Another U-shaped pull rod is also connected to the O-shaped pull rod. An adjusting screw is provided on the U-shaped pull rod. The U-shaped pull rod is connected to the bearing beam through the adjusting screw. A nut screwed to the adjusting screw is provided on the adjusting screw.

[0008] Furthermore, a connecting pin shaft is provided between each U-shaped pull rod and the O-shaped pull rod.

[0009] Furthermore, a highest position limiter and a lowest position limiter electrically connected to the driving motor are also included. The highest position limiter and the lowest position limiter are symmetrically arranged at both ends of the guiding side plate on the cross-bracing mounting seat located at the middle position. A limiting collision block is provided on the traveling wheel located at the middle position.

[0010] The present invention provides a lifting table by improvement. Compared with the prior art, it has the following improvements and advantages:

[0011] (1) Multiple groups of cross-bracing structures can be provided, which can reduce the material consumption of the table top plate profiles and facilitate production and on-site installation.

[0012] (2) The connection position between the U-shaped pull rod and the cross-bracing structure can be adjusted to fix the position, ensuring that multiple groups of cross-bracing structures can be on the same horizontal plane.

[0013] (3) The gear-rack transmission has a relatively high efficiency, which is superior to the transmission methods such as hydraulic rods, electric rods, and screw nuts.

[0014] (4) Mechanical limits are set at the maximum stroke and minimum stroke positions, which can effectively protect the integrity of the entire structure in the case of over-travel operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the front view of the present invention;

[0016] Figure 2 Schematic diagram of the three-dimensional structure of the present invention;

[0017] Figure 3 Schematic diagram of the partial three-dimensional structure of the present invention;

[0018] Figure 4 is Figure 2 The enlarged view of part Ⅰ in

[0019] Figure 5 is Figure 1 The enlarged view of part II in

[0020] Figure 6 Side view of the present invention;

[0021] Figure 7 is Figure 6 The enlarged view of part III in

[0022] Figure 8 is Figure 2 The enlarged view of part IV in

[0023] Figure 9 Schematic diagram of the maximum jacking position of the present invention;

[0024] Figure 10 Schematic diagram of the minimum jacking position of the present invention;

[0025] Figure 11 Floor plan of the present invention;

[0026] Explanation of reference numerals:

[0027] Motor mounting base 1, driving motor 2, primary speed reducer 3, intermediate shaft 4, coupling 5, secondary speed reducer 6, rack 7, gear 8, speed reducer mounting base 9, rack guide seat 10, U-shaped pull rod 11, bracing mounting seat 12, highest position limiter 13, lowest position limiter 14, O-shaped pull rod 15, bracing structure 16, table board 17, guide side plate 18, limit plate 19, load-bearing beam 20, walking wheel 21, guide groove 22, limit collision block 23, adjusting screw 24, tensioner 25, pin shaft 26, bracing arm 27, nut 28. Detailed implementation manners

[0028] The present invention will be described in detail below. The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Figures 1 to 11

[0029] ​The present invention provides a lifting platform through improvement, including a motor mounting seat 1, a driving motor 2, a table panel 17, two deceleration connection structures, four shear strut mounting seats 12 and four shear strut structures 16. The motor mounting seat 1 is horizontally arranged, and a first-stage reducer 3 is provided on the motor mounting seat 1. The first-stage reducer 3 can adjust the torque generated by the driving motor 2. The driving motor 2 is transmission-connected to the first-stage reducer 3. The driving motor 2 of this lifting platform is equipped with a dual brake and stroke detection device. The two deceleration connection structures are symmetrically arranged at both ends of the first-stage reducer 3. The two deceleration connection structures are transmission-connected to the first-stage reducer 3. The four shear strut mounting seats 12 are arranged at equal intervals. The four shear strut structures 16 are respectively rotatably connected to the four shear strut mounting seats 12. The table panel 17 is horizontally arranged on the top of the four shear strut structures 16. The table panel 17 is rotationally connected to the four shear strut structures 16, and the two deceleration connection structures are fixedly connected to the four shear strut structures 16 respectively. When the lifting platform is lifted or lowered, the driving motor 2 drives the two reduction connection structures to rotate, and the two reduction connection structures drive the four scissor strut structures 16 to rotate on the four scissor strut mounting seats 12, so that the scissor strut structures 16 reciprocate up and down to achieve the height position change of the table panel 17.

[0030] Specifically, each of the deceleration connection structures includes a transition shaft 4, a coupling 5, two U-shaped tie rods 11, and two secondary speed reducers 6. The two rack guide seats 10 are symmetrically arranged at both ends of the primary speed reducer 3. A speed reducer mounting seat 9 is provided on the motor mounting seat 1. One of the secondary speed reducers 6 is arranged on the speed reducer mounting seat 9 and is drivingly connected to the primary speed reducer 3 through the transition shaft 4. The other secondary speed reducer 6 is arranged on the motor mounting seat 1 and is drivingly connected to the primary speed reducer 3 through the coupling 5. The secondary speed reducer 6 can further adjust the torque generated by the driving motor 2. Two gears 8 drivingly connected to each secondary speed reducer 6 are provided. A rack 7 meshing with the bottom of the gear 8 is provided. The speed reducer mounting seat 9 and the motor mounting seat 1 are both provided with rack guide seats 10 for carrying the movement of the rack 7. The rack guide seats 10 guide and carry the left and right movement of the rack 7. Each bracing structure 16 includes two connecting shafts and two groups of bracing arms 27. This device uses multiple groups of bracing structures 16 to lift simultaneously, which can reduce the load-bearing span of the table board 17 for large-size lifting platforms and effectively reduce the size of the profiles used for the table board 17. The two groups of bracing arms 27 are rotationally connected through two connecting shafts. The bottom of each group of bracing arms 27 is rotationally connected to the bracing mounting seat 12. Two traveling wheels 21 are provided on each group of bracing arms 27. The two traveling wheels 21 are respectively rotationally connected to the top and bottom of the bracing arm 27. A guide groove 22 for the traveling wheels 21 located at the top to move is provided at the bottom of the table board 17. Two symmetrically arranged limiting plates 19 are provided on the bracing mounting seat 12. A guide side plate 18 is provided beside the two limiting plates 19. A moving space is formed between the guide side plate 18 and the limiting plates 19. A bearing beam 20 slidably matched with the two limiting plates 19 is provided between the two limiting plates 19. The two traveling wheels 21 at the bottom of the bracing structure 16 are respectively rotationally connected to both ends of the bearing beam 20. The two traveling wheels 21 at the bottom of the bracing structure 16 rotate between the two moving gaps. The traveling wheels 21 move in the guide groove 22 and the moving gaps, guiding the traveling wheels 21 to move in the guide groove 22 and the moving gaps, so that each group of bracing structures 16 can reach the table board 17 for load-bearing and guiding operation, effectively preventing lateral inclination. This device uses multiple groups of bracing structures 16 to lift simultaneously, which can reduce the load-bearing span of the table board 17 for large-size lifting platforms and effectively reduce the size of the profiles used for the table board 17.

[0031] Specifically, each end of the rack 7 is connected to a U-shaped pull rod 11, and an O-shaped pull rod 15 is provided at the tail end of the U-shaped pull rod 11. A tensioner 25 is provided between the O-shaped pull rod 15 and the U-shaped pull rod 11, and another U-shaped pull rod 11 is connected to the O-shaped pull rod 15. An adjusting screw 24 is provided on the U-shaped pull rod 11, and the U-shaped pull rod 11 is connected to the load-bearing beam 20 through the adjusting screw 24. The adjusting screw 24 is provided with a nut 28 connected to the screw. The U-shaped pull rod 11 has an adjusting thread, which can adjust the accuracy of multiple groups of shear strut structures 16 in the same horizontal plane, so that each group of shear strut structures 16 is evenly stressed, so that the table panel 17 is in a horizontal state, and the U-shaped pull rod 11 is fixed to the load-bearing beam 20 by the nut 28 after the adjustment is completed.

[0032] When in use, the driving motor 2 drives the two secondary reducers 6 to rotate through the transition shaft 4 and the coupling 5, thereby driving the two gears 8 to rotate. The rotation of the two gears 8 drives the two racks 7 to move left and right on the rack guide seat 10. The position of the rack 7 moves and drives one of the U-shaped pull rods 11 to move horizontally, thereby moving the O-shaped pull rod 15. The movement of the O-shaped pull rod 15 drives the other U-shaped pull rod 11 to move horizontally. The two U-shaped pull rods 11 move horizontally, thereby driving the load-bearing beam 20 to move left and right on the two guide side plates 18. The movement of the load-bearing beam 20 drives the two sets of shear bracing arms 27 to rotate on the two rotating shafts. The rotation of the two sets of shear bracing arms 27 drives the walking wheels 21 at the top to rotate in the guide groove 22, and drives the walking wheels 21 at the bottom to move in the moving gap, so that the shear bracing structure 16 rotates on the shear bracing mounting seat 12, thereby realizing the rising of the table panel 17.

[0033] Specifically, a connecting pin 26 is provided between each of the U-shaped pull rods 11 and the O-shaped pull rods 15. When in use, the U-shaped pull rods 11 and the O-shaped pull rods 15 can be disassembled, and the number of the shear support structures 16 can be increased or decreased according to the length of the lifting platform.

[0034] Specifically, it also includes a maximum limiter 13 and a minimum limiter 14 electrically connected to the drive motor 2. The maximum limiter 13 and the minimum limiter 14 are symmetrically arranged at the two ends of the guide side plate 18 on the shear support mounting seat 12 located in the middle position. A limit collision block 23 is provided on the running wheel 21 located in the middle position. When the running wheel 21 moves on the shear support mounting seat 12, it drives the limit collision block 23 to move left and right, and conflicts with the maximum limiter 13 and the minimum limiter 14, which can control the start and stop of the drive motor 2. This device can effectively prevent the equipment from exceeding the maximum and minimum travel positions. The lifting platform with this transmission structure can be customized according to customer needs. Equipment of different widths and lengths.

[0035] Working principle: When the table board 17 rises, the driving motor 2 works and drives two secondary speed reducers 6 to rotate through the intermediate shaft 4 and the coupling 5, thereby driving two gears 8 to rotate. The rotation of the two gears 8 drives two racks 7 to move left and right in the rack guide seats 10. The movement of the position of the rack 7 drives one of the U-shaped pull rods 11 to move horizontally, thereby driving the O-shaped pull rod 15 to move. The movement of the O-shaped pull rod 15 drives the other U-shaped pull rod 11 to move horizontally. The horizontal movement of the two U-shaped pull rods 11 drives the bearing beam 20 to move left and right on the two guide side plates 18. The movement of the bearing beam 20 drives two groups of scissors arms 27 to rotate on two rotating shafts. The rotation of the two groups of scissors arms 27 drives the traveling wheels 21 at the top to rotate in the guide grooves 22 and drives the traveling wheels 21 at the bottom to move in the moving gaps, so that the scissors structure 16 rotates on the scissors mounting seat 12, realizing the rise of the table board 17;

[0036] When the table board 17 descends, the driving motor 2 reverses, and the pulling force transmitted by the driving motor 2 to the U-shaped pull rod 11 and the O-shaped pull rod 15 decreases. Under the self-weight of the table board 17, the scissors structure 16 expands outwards, and the table board 17 descends. During the entire lifting and lowering process, the U-shaped pull rod 11 and the O-shaped pull rod 15 are both under the action of pulling force.

[0037] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lifting platform, characterized in that: It includes a motor mounting base (1), a driving motor (2), a table top panel (17), two speed reduction connection structures, four scissors support mounting bases (12) and four scissors support structures (16). The motor mounting base (1) is horizontally arranged. A primary speed reducer (3) is provided on the motor mounting base (1). The driving motor (2) is drivingly connected to the primary speed reducer (3). The two speed reduction connection structures are symmetrically arranged at both ends of the primary speed reducer (3). The two speed reduction connection structures are drivingly connected to the primary speed reducer (3). The four scissors support mounting bases (12) are arranged at equal intervals. The four scissors support structures (16) are respectively rotatably connected to the four scissors support mounting bases (12). The table top panel (17) is horizontally arranged on the tops of the four scissors support structures (16). The table top panel (17) is rotatably connected to the four scissors support structures (16). The two speed reduction connection structures are respectively fixedly connected to the four scissors support structures (16). Each of the speed reduction connection structures includes a transition shaft (4), a coupling (5), two U-shaped tie rods (11) and two secondary speed reducers (6). The two rack guide seats (10) are symmetrically arranged at both ends of the primary speed reducer (3). A speed reducer mounting base (9) is provided on the motor mounting base (1). One of the secondary speed reducers (6) is arranged on the speed reducer mounting base (9) and is drivingly connected to the primary speed reducer (3) through the transition shaft (4). The other secondary speed reducer (6) is arranged on the motor mounting base (1) and is drivingly connected to the primary speed reducer (3) through the coupling (5). Two gears (8) drivingly connected to each secondary speed reducer (6) are provided on each secondary speed reducer (6). A rack (7) meshing with the bottom of the gear (8) is provided at the bottom of the gear (8). Rack guide seats (10) for carrying the movement of the rack (7) are provided on both the speed reducer mounting base (9) and the motor mounting base (1). Each scissors support structure (16) includes two connecting shafts and two groups of scissors arms (27). The two groups of scissors arms 27 are rotatably connected through the two connecting shafts. The bottom of each group of scissors arms (27) is rotatably connected to the scissors support mounting base (12). Two traveling wheels (21) are provided on each group of scissors arms (27). The two traveling wheels (21) are respectively rotatably connected to the top and bottom of the scissors arm (27). A guide groove (22) for the traveling wheel (21) located at the top to move is provided at the bottom of the table top panel (17). Two symmetrically arranged limiting plates (19) are provided on the scissors support mounting base (12). Guide side plates (18) are provided beside the two limiting plates (19). A moving space is formed between the guide side plate (18) and the limiting plate (19). A carrying beam (20) slidably matched with the two limiting plates (19) is provided between the two limiting plates (19). The two traveling wheels (21) at the bottom of the scissors support structure (16) are respectively rotatably connected to both ends of the carrying beam (20). The two traveling wheels (21) at the bottom of the scissors support structure (16) rotate between the two moving gaps. One end of each of the racks (7) is connected to a U-shaped pull rod (11). An O-shaped pull rod (15) is provided at the tail end of the U-shaped pull rod (11). A tensioner (25) is provided between the O-shaped pull rod (15) and the U-shaped pull rod (11). Another U-shaped pull rod (11) is also connected to the O-shaped pull rod (15). An adjusting screw (24) is provided on the U-shaped pull rod (11). The U-shaped pull rod (11) is connected to the bearing beam (20) through the adjusting screw (24). A nut (28) screwed to the adjusting screw (24) is provided on the adjusting screw (24).

2. The lift table according to claim 1, characterized in that, A connecting pin shaft (26) is provided between each of the U-shaped pull rods (11) and the O-shaped pull rod (15).

3. A lifting platform according to claim 1, characterized in that, It further includes a highest position limiter (13) and a lowest position limiter (14) electrically connected to the driving motor (2). The highest position limiter (13) and the lowest position limiter (14) are symmetrically arranged at both ends of a guiding side plate (18) on a scissors brace mounting seat (12) located at the middle position. A limiting collision block (23) is provided on a walking wheel (21) located at the middle position.

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