Small lifting turntable for stage performance

Abstract

The application provides a small lifting turntable for stage performance, which comprises a support, an outer cylinder, an inner cylinder, a rack, a first motor, a support frame and a second motor. The support is fixedly connected with a foundation pre-embedded plate. The outer cylinder is fixedly connected with the support. The inner cylinder is sleeved in the outer cylinder. The rack is arranged on the outer wall of the inner cylinder in the vertical direction. The first motor is fixed on the outer cylinder. The output end of the first motor is provided with a first driving gear. The first driving gear is engaged with the rack after penetrating through the side wall of the outer cylinder. The support frame is rotatably installed on the top end of the inner cylinder around the axis of the inner cylinder. The second motor is fixed on the inner cylinder and is used for driving the support frame to rotate. The lifting turntable realizes lifting and rotation and improves stage performance.

Description

Technical Field

[0001] This invention relates to the field of rotating stage technology, and more particularly to a small lifting turntable for stage performances. Background Technology

[0002] In stage performances, mechanical devices such as lifting and turning platforms are often needed to assist actors in making diverse entrances, exits, and dynamic performances within a limited space.

[0003] Most existing stage lifting platforms use winch traction systems or hydraulic drive mechanisms as their power source.

[0004] In the process of realizing this invention, the inventors discovered that the prior art has at least the following problems: the winch system usually needs to be equipped with a large motor, reducer and wire rope guide device, the overall structure is bulky and occupies a lot of clearance under the stage, making it difficult to be used in small and medium-sized theaters or temporary stages; at the same time, it relies on rope transmission, has low positioning accuracy and slow response, making it difficult to meet the precise control requirements for lifting position and timing in high-paced performances.

[0005] While hydraulic drive systems can provide greater thrust, their hydraulic pump stations, oil tanks, and piping systems also occupy a significant amount of space and pose risks such as oil leaks, complex maintenance, and high noise levels. More importantly, the non-linear speed regulation and poor repeatability of hydraulic systems can easily lead to disjointed movements when actors go on and off stage, affecting the performance. Summary of the Invention

[0006] The present invention aims to at least partially solve one of the technical problems in the related art.

[0007] Therefore, the purpose of this invention is to provide a small lifting turntable for stage performances that is compact in structure, runs smoothly, and has good positioning accuracy.

[0008] To achieve the above objectives, the present invention provides a small lifting turntable for stage performances, comprising: Supports are used for fixed connection with the foundation embedded plate; The outer cylinder and the support are fixedly connected. The inner cylinder is fitted inside the outer cylinder; A rack is vertically mounted on the outer wall of the inner cylinder; A first motor is fixed on the outer cylinder. A first drive gear is installed at the output end of the first motor. The first drive gear passes through the side wall of the outer cylinder and meshes with the rack. A support frame is rotatably mounted on the top of the inner cylinder about its axis; The second motor, fixed to the inner cylinder, is used to drive the support frame to rotate.

[0009] According to one embodiment of the present invention, a plurality of first fasteners are further included, the plurality of first fasteners being arranged at circumferential intervals along the outer cylinder, passing through mounting holes on the support and being fixedly connected to the foundation embedded plate.

[0010] According to one embodiment of the present invention, the device further includes a slewing bearing, a connecting plate, and a second fastener; the top end of the inner cylinder is fixedly connected to the connecting plate; the slewing bearing includes an inner ring and an outer ring, the inner ring is fixedly connected to the connecting plate, the outer ring is connected to the bottom end of the support frame through the second fastener, and the outer ring is provided with a toothed ring on its outer periphery; a second drive gear is installed at the output end of the second motor, and the second drive gear meshes with the outer ring.

[0011] According to one embodiment of the present invention, the device further includes a first guide component and a second guide component, which are sequentially and fixedly connected from bottom to top to the outer wall of the outer cylinder. Both the first guide component and the second guide component include a plurality of guide wheels, which extend into the inner cavity of the outer cylinder through an opening on the side wall of the outer cylinder and roll in contact with the outer wall of the inner cylinder.

[0012] According to one embodiment of the present invention, the second guide assembly includes a bracket and a plurality of guide wheel pairs; each guide wheel pair includes a shaft and two guide wheels, the two guide wheels are mounted on the shaft by bearings, and the shaft is fixedly mounted on the bracket; the plurality of guide wheel pairs are arranged circumferentially along the inner cylinder, and the two guide wheels of each guide wheel pair are respectively located on both sides of the outer wall of the inner cylinder and are in rolling contact with the inner cylinder.

[0013] According to one embodiment of the present invention, a speed reducer is further included. The speed reducer is fixedly installed at the bottom end of the bracket. The first motor is fixedly connected below the speed reducer. The output end of the first motor is connected to the input end of the speed reducer. The output end of the speed reducer is connected to the first drive gear.

[0014] According to one embodiment of the present invention, the support frame includes a wheel center, multiple spokes and a wheel rim, the wheel center is fixedly connected to the outer rim, the multiple spokes are evenly distributed circumferentially along the wheel center, one end of each spoke is fixedly connected to the wheel center and the other end of each spoke is fixedly connected to the wheel rim.

[0015] According to one embodiment of the present invention, the wheel rim is further comprising a plurality of angle steels, which are fixedly connected to the outer side of the rim along the circumference of the rim, the angle steels extending vertically downwards, and the top ends of the angle steels being flush with the top ends of the rim.

[0016] According to one embodiment of the present invention, it further includes a striker mounting bracket, a first striker, a first limit switch, a second limit switch, and a third limit switch; the striker mounting bracket includes a horizontal bar and a vertical bar that are perpendicularly connected to each other, one end of the horizontal bar is fixedly connected to the inner cylinder, and the vertical bar extends vertically downward; The first impact block is installed at the bottom end of the edge of the support frame; the first limit switch is installed on the crossbar and is triggered by the first impact block when the support frame rotates to a predetermined angle position to achieve rotation zero position detection; the second limit switch and the third limit switch are installed sequentially from top to bottom on the side wall of the outer cylinder, and a second impact block is installed on the vertical rod. The second impact block is used to trigger the second limit switch when rising to the limit position to limit the maximum rising height of the inner cylinder, and to trigger the third limit switch when descending to the initial position to determine the initial descending position of the inner cylinder.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The small lifting turntable for stage performance according to the present invention realizes lifting and rotation, thereby improving the stage performance.

[0018] 2. In this invention, the first motor is installed on the outer cylinder, the second electrode is installed on the inner cylinder, and the rack is installed between the inner and outer cylinders. The inner and outer cylinders are coaxially nested, which occupies little underground stage space.

[0019] 3. The gear and rack transmission in this invention features high rigidity and low backlash. Combined with the constraint of the guide assembly on the inner cylinder, it effectively suppresses swaying and wobbling during the lifting process. At the same time, through the cooperation of the limit switch and the stop block, the upper limit, lower limit and zero position of the lifting stroke can be precisely controlled.

[0020] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. Wherein: Figure 1 This is a schematic diagram of the structure of a small lifting turntable for stage performance in the retracted state according to an embodiment of the present invention.

[0022] Figure 2 This is a schematic diagram of the structure of a small lifting turntable for stage performance in the extended state according to an embodiment of the present invention.

[0023] Figure 3 yes Figure 1 The P-direction view in the diagram.

[0024] Figure 4 yes Figure 1 A magnified view of a portion of point C.

[0025] Figure 5 yes Figure 1 A cross-sectional view along line AA.

[0026] Figure 6 yes Figure 1 A sectional view along line BB.

[0027] Figure 7 yes Figure 1 A cross-sectional view along line DD.

[0028] Explanation of reference numerals in the attached figures: 1-Support, 2-First fastener, 3-First motor, 5-Outer cylinder, 6-Rack, 7-First drive gear, 8-Inner cylinder, 9-Second motor, 10-Slewing bearing, 11-Support frame, 12-First impact block, 13-First limit switch, 14-Second limit switch, 15-Angle steel, 16-Impact block mounting bracket, 17-Second fastener, 18-First guide assembly, 19-Second guide assembly, 20-Third limit switch, 111-Spoke, 112-Wheel center, 113-Wheel rim, 161-Second impact block, 191-Bracket, 192-Shaft, 193-Guide wheel. Detailed Implementation

[0029] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the invention, and should not be construed as limiting the invention. Rather, embodiments of the invention include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0030] The following reference Figures 1 to 7 This describes a small lifting turntable for stage performances according to an embodiment of the present invention.

[0031] See Figure 1 According to an embodiment of the present invention, a small lifting turntable for stage performance includes a support 1, an outer cylinder 5, an inner cylinder 8, a rack 6, a first motor 3, a support frame 11, and a second motor 9. In this embodiment, "small" means that the diameter of the support frame 11 is less than or equal to 1.5 meters.

[0032] Support 1 is used for fixed connection with the foundation embedded plate. Support 1 can be fixed to the foundation embedded plate using a first fastener 2, wherein the first fastener 2 can be a bolt. The outer cylinder 5 and support 1 are fixedly connected. In one example, support 1 is welded to the outer cylinder 5. The outer cylinder 5 is vertically installed on the foundation embedded plate, and the inner cylinder 8 is sleeved inside the outer cylinder 5 and can slide relative to the outer cylinder 5 in the vertical direction. The shapes of the outer cylinder 5 and the inner cylinder 8 are set according to actual needs; for example, the cross-sectional shape of both the outer cylinder 5 and the inner cylinder 8 is rectangular. A rack 6 is provided vertically on the outer wall of the inner cylinder 8.

[0033] The first motor 3 is fixed on the outer cylinder 5. The output end of the first motor 3 is equipped with a first drive gear 7. The first drive gear 7 passes through the side wall of the outer cylinder 5 and meshes with the rack 6. The first motor 3 drives the inner cylinder 8 to rise and fall through the first drive gear 7.

[0034] The support frame 11 is rotatably mounted on top of the inner cylinder 8 about its axis. The support frame 11 is a platform for supporting the actors and performance equipment. A second motor 9 is fixed to the inner cylinder 8 and is used to drive the rotation of the support frame 11 relative to the inner cylinder 8.

[0035] Therefore, the small lifting turntable for stage performances in this embodiment of the invention realizes lifting and rotation, which can improve the stage performance.

[0036] like Figure 5 As shown, in some embodiments, a plurality of first fasteners 2 in the small lifting turntable for stage performance are arranged at intervals along the circumference of the outer cylinder 5, pass through the mounting holes on the support 1 and are fixedly connected to the foundation embedded plate, thereby achieving a stable connection between the outer cylinder 5 and the foundation embedded plate.

[0037] Combination Figure 1 and Figure 4 As shown, in some embodiments, the small lifting turntable for stage performances also includes a slewing bearing 10, a connecting plate, and a second fastener 17. The second fastener 17 may be a bolt. The connecting plate is fixed to the top of the inner cylinder 8. In one example, the top of the inner cylinder 8 is welded to the connecting plate. The slewing bearing 10 is coaxial with the axis of the inner cylinder 8. The slewing bearing 10 includes an inner ring and an outer ring. The inner ring can be fixedly connected to the connecting plate by a fastener such as a bolt, and the outer ring is connected to the bottom end of the support frame 11 by the second fastener 17. The outer ring has a toothed ring on its outer periphery. A second drive gear is installed at the output end of the second motor 9, and the second drive gear meshes with the toothed ring of the outer ring. The gear-toothed ring meshing has the characteristics of low backlash and high repeatability positioning accuracy, which can improve the stability of the rotational movement of the support frame 11.

[0038] Combination Figure 1 , Figure 6 and Figure 7As shown, the small lifting turntable for stage performances also includes a first guide assembly 18 and a second guide assembly 19. The first guide assembly 18 and the second guide assembly 19 are sequentially fixed to the outer wall of the outer cylinder 5 from bottom to top. Both the first guide assembly 18 and the second guide assembly 19 include multiple guide wheels 193. The guide wheels 193 extend into the inner cavity of the outer cylinder 5 through openings on the side wall of the outer cylinder 5 and roll in contact with the outer wall of the inner cylinder 8. The guide wheels 193 can be made of low rolling resistance plastic or metal to reduce energy consumption and noise. The first guide assembly 18 and the second guide assembly 19 are arranged at intervals, which can effectively reduce horizontal offset and torsion caused by vibration.

[0039] Specifically, the second guide assembly 19 includes a bracket 191 and multiple guide wheel pairs. Each guide wheel pair includes a shaft 192 and two guide wheels 193. The two guide wheels are mounted on the shaft 192 via bearings, and the shaft 192 is fixedly mounted on the bracket 191. The multiple guide wheel pairs are arranged circumferentially along the inner cylinder 8. The two guide wheels 193 of each guide wheel pair are located on opposite sides of the outer wall of the inner cylinder 8 and are in rolling contact with the inner cylinder 8. The number of guide wheel pairs is set according to actual needs and is not limited thereto. For example, such as... Figure 7 As shown, there are 4 guide wheels, corresponding to the number on the sides of the outer cylinder 5 and the inner cylinder 8, to achieve uniform force distribution and stable guidance.

[0040] In some embodiments, such as Figure 1 As shown, the small lifting turntable for stage performances also includes a reducer, which is fixedly installed at the bottom of the bracket 191. The first motor 3 is fixedly connected below the reducer, and the output end of the first motor 3 is connected to the input end of the reducer. The output end of the reducer is connected to the first drive gear 7. The above installation method can make full use of the longitudinal space on the side of the outer cylinder 5 to achieve a compact stage layout.

[0041] like Figure 3 As shown, the support frame 11 of the small lifting turntable for stage performance includes a wheel center 112, multiple spokes 111, and a rim 113. The wheel center 112 is fixedly connected to the outer rim, and the multiple spokes 111 are evenly distributed around the circumference of the wheel center 112. One end of each spoke 111 is fixedly connected to the wheel center 112, and the other end is fixedly connected to the rim 113. This structure of the support frame 11 achieves lightweight design and high structural strength. The surface of the support frame 11 is used to mount the performance stage, and the gaps between the spokes 111 facilitate wiring.

[0042] The small lifting turntable for stage performances also includes multiple angle steels 15, which are fixedly connected to the outer side of the rim 113 along its circumference. The angle steels 15 extend vertically downwards, with their tops flush with the top of the rim 113. All angle steels 15 are of the same length. These angle steels 15 form a ring-shaped mounting frame, providing rigid support for the decorative stage backdrop.

[0043] Combination Figure 1 and Figure 2 As shown, in some embodiments, the small lifting turntable for stage performances also includes a collision block mounting frame 16, a first collision block 12, a first limit switch 13, a second limit switch 14, and a third limit switch 20. The collision block mounting frame 16 includes a horizontal bar and a vertical bar that are perpendicularly connected to each other. One end of the horizontal bar is fixedly connected to the inner cylinder 8, and the vertical bar extends vertically downward.

[0044] The first stop block 12 is installed at the bottom edge of the support frame 11, radially spaced from the slewing bearing 10. The first limit switch 13 is installed on the crossbar and is triggered by the first stop block 12 when the support frame 11 rotates to a predetermined angle position to achieve zero-position rotation detection. The second limit switch 14 and the third limit switch 20 are sequentially installed from top to bottom on the side wall of the outer cylinder 5. A second stop block 161 is installed on the vertical rod. The second stop block 161 is used to trigger the second limit switch 14 when the inner cylinder 8 rises to its limit position to limit the maximum rising height, and to trigger the third limit switch 20 when the inner cylinder 8 descends to its initial position to determine the initial falling position of the inner cylinder 8. In one example, two second limit switches 14 and two third limit switches 20 are each configured and installed adjacent to each other along the side wall of the outer cylinder 5. The adjacent double limit switches constitute electrical detection redundancy: even if one limit switch fails due to mechanical wear, contact oxidation, or signal failure, the adjacent limit switch can still output a limit signal normally, ensuring that the control system stops the motor in time and effectively prevents the inner cylinder 8 from overtraveling or falling unexpectedly.

[0045] In addition, the small lifting turntable for stage performance also includes a controller. The input end of the controller is electrically connected to the first limit switch 13, the second limit switch 14 and the third limit switch 20 respectively, and the output end of the controller is connected to the first motor 3 and the second motor 9 respectively.

[0046] The working process of the small lifting turntable for stage performance is as follows: When the controller issues the "rise" or "fall" command, the first motor 3 starts to work. The torque of the first motor 3 is transmitted to the first drive gear 7 through the reducer. The first drive gear 7 rotates and drives the inner cylinder 8 to move up or down through the meshing of the rack 6. As a result, the entire support frame 11 and the impact block mounting frame 16 rise or fall. When the second impact block 161 triggers the corresponding limit switch during the rising or falling process, the support frame 11 stops rising and falling.

[0047] When the controller issues a "rotate" command, the second motor 9 starts working, the second drive gear rotates, driving the outer ring to rotate, and then the entire support frame 11 rotates. When the first impact block 12 triggers the first limit switch 13 during rotation, the first limit switch 13 immediately sends a zero-position signal back to the controller. After receiving the signal, the controller can complete the angle calibration accordingly, which serves as a reference for subsequent rotation positioning.

[0048] It should be noted that in the description of this invention, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0049] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0050] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0051] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0052] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A small lifting turntable for stage performances, characterized in that, include: Support (1) is used for fixed connection with the foundation embedded plate; The outer cylinder (5) and the support (1) are fixedly connected; The inner cylinder (8) is fitted inside the outer cylinder (5); A rack (6) is vertically disposed on the outer wall of the inner cylinder (8); The first motor (3) is fixed on the outer cylinder (5). The output end of the first motor (3) is equipped with a first drive gear (7). The first drive gear (7) passes through the side wall of the outer cylinder (5) and meshes with the rack (6). A support frame (11) is rotatably mounted on the top of the inner cylinder (8) about the axis of the inner cylinder (8); The second motor (9) is fixed on the inner cylinder (8) and is used to drive the support frame (11) to rotate.

2. The small lifting turntable for stage performances according to claim 1, characterized in that, It also includes a plurality of first fasteners (2), which are arranged at circumferential intervals along the outer cylinder (5), pass through the mounting holes on the support (1) and are fixedly connected to the foundation pre-embedded plate.

3. A small lifting turntable for stage performances according to claim 1, characterized in that, It also includes a slewing bearing (10), a connecting plate, and a second fastener (17); the top end of the inner cylinder (8) is fixedly connected to the connecting plate; the slewing bearing (10) includes an inner ring and an outer ring, the inner ring is fixedly connected to the connecting plate, the outer ring is connected to the bottom end of the support frame (11) through the second fastener (17), and the outer ring is provided with a toothed ring on its outer periphery; the output end of the second motor (9) is equipped with a second drive gear, and the second drive gear meshes with the outer ring.

4. A small lifting turntable for stage performances according to claim 3, characterized in that, It also includes a first guide component (18) and a second guide component (19). The first guide component (18) and the second guide component (19) are sequentially fixedly connected to the outer wall of the outer cylinder (5) from bottom to top. The first guide component (18) and the second guide component (19) each include a plurality of guide wheels (193). The guide wheels (193) extend into the inner cavity of the outer cylinder (5) through the opening on the side wall of the outer cylinder (5) and roll in contact with the outer wall of the inner cylinder (8).

5. A small lifting turntable for stage performances according to claim 4, characterized in that, The second guide assembly (19) includes a bracket (191) and multiple guide wheel pairs; each guide wheel pair includes a shaft (192) and two guide wheels (193), the two guide wheels are mounted on the shaft (192) by bearings, and the shaft (192) is fixedly mounted on the bracket (191); the multiple guide wheel pairs are arranged circumferentially along the inner cylinder (8), and the two guide wheels (193) of each guide wheel pair are located on both sides of the outer wall of the inner cylinder (8) and are in rolling contact with the inner cylinder (8).

6. A small lifting turntable for stage performances according to claim 5, characterized in that, It also includes a speed reducer, which is fixedly installed at the bottom of the bracket (191). The first motor (3) is fixedly connected below the speed reducer. The output end of the first motor (3) is connected to the input end of the speed reducer, and the output end of the speed reducer is connected to the first drive gear (7).

7. A small lifting turntable for stage performances according to claim 5, characterized in that, The support frame (11) includes a wheel center (112), multiple spokes (111) and a wheel rim (113). The wheel center (112) is fixedly connected to the outer rim. The multiple spokes (111) are evenly distributed around the wheel center (112). One end of each spoke (111) is fixedly connected to the wheel center (112), and the other end of each spoke (111) is fixedly connected to the wheel rim (113).

8. A small lifting turntable for stage performances according to claim 7, characterized in that, It also includes multiple angle steels (15), which are fixedly connected to the outer side of the rim (113) along the circumference of the rim (113). The angle steels (15) extend vertically downward, and the top of the angle steels (15) is flush with the top of the rim (113).

9. A small lifting turntable for stage performances according to any one of claims 1 to 8, characterized in that, It also includes a striker mounting bracket (16), a first striker (12), a first limit switch (13), a second limit switch (14) and a third limit switch (20); the striker mounting bracket (16) includes a horizontal bar and a vertical bar that are perpendicularly connected to each other, one end of the horizontal bar is fixedly connected to the inner cylinder (8), and the vertical bar extends vertically downward; The first impact block (12) is installed at the bottom end of the edge of the support frame (11); the first limit switch (13) is installed on the crossbar and is triggered by the first impact block (12) when the support frame (11) rotates to a predetermined angle position to realize the zero-position detection of rotation; the second limit switch (14) and the third limit switch (20) are installed sequentially from top to bottom on the side wall of the outer cylinder (5), and the second impact block (161) is installed on the vertical rod. The second impact block (161) is used to trigger the second limit switch (14) when rising to the limit position to limit the maximum rising height of the inner cylinder (8), and to trigger the third limit switch (20) when descending to the initial position to determine the initial descending position of the inner cylinder (8).

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