Load wheel and rotating platform

Abstract

The application relates to a load wheel and a rotating platform, the rotating platform comprising a rotating table, an annular rotating disc arranged below the rotating table, the load wheel supporting the annular rotating disc, the rotating table and the annular rotating disc being connected through a connecting piece, a rotating assembly being arranged at a lower central position of the rotating table, the rotating assembly being connected with the rotating table and the annular rotating disc, and the top of the rotating assembly being connected with the rotating table. In the load wheel, the bottom plate is an arc surface, the arc surface of the bottom plate is arranged on two rows of roller wheels, connecting plates are arranged at both ends of the bottom plate, the connecting plates are provided with screw holes, adjusting bolts are engaged with the screw holes through threads, and the adjusting bolts abut against limiting blocks. A plurality of driving load wheels and driven load wheels are arranged around the bottom of the annular rotating disc, so that the rotating table center and the position close to the edge are supported and can rotate, the rotating table is more stable when rotating, and the rotating table can still be kept stable when rotating even if the rotating table radius is relatively large.

Description

Technical Field

[0001] This invention relates to the field of horizontal rotating platform technology, and more specifically, to a load-bearing wheel and a rotating platform including the load-bearing wheel, particularly a horizontal rotating platform. Background Technology

[0002] Horizontal rotating platforms are an important component of many experimental platforms. However, a significant problem with horizontal rotating platforms is that they are prone to tilting during rotation. With a large platform area, even slight height differences or slight tilts can lead to significant height variations at the edges. Therefore, many experimental rotating platforms have relatively small diameters, which severely limits their applicability and the accuracy of simulation experiments.

[0003] Therefore, a rotating platform that can better maintain stable horizontal rotation is needed. Summary of the Invention

[0004] The purpose of this invention is to provide a load-bearing wheel and a rotating platform to solve the problems mentioned in the above-mentioned technical background, so that the rotating platform can better maintain stability when rotating.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The first aspect of this application provides a load-bearing wheel, including a support wheel, a base plate, and two support plates fixed on the base plate. A rotating shaft is rotatably connected between the two support plates, and the support wheel is connected to the rotating shaft, which passes through the central axis of the support wheel. The bottom of the base plate is an arc-shaped surface extending along the direction of the rotating shaft. A base is provided below the base plate, and two rows of rollers are provided on the top of the base along the direction of the rotating shaft. The arc-shaped surface of the base plate is supported on the two rows of rollers. Connecting plates are installed at both ends of the arc-shaped surface of the base plate. A limiting block is installed below the connecting plate on the base. The connecting plate is provided with a screw hole. An adjusting bolt passes through the screw hole and abuts against the limiting block. The adjusting bolt engages with the screw hole through a thread.

[0007] Preferably, the load-bearing roller further includes a limiting component for preventing the base plate from moving along the length direction of the roller.

[0008] Preferably, the limiting component includes a limiting ring and a protrusion. The center of the arc-shaped surface of the base plate is recessed upward so that the two sides of the arc-shaped surface form the protrusion. The protrusion is mounted on a roller, and two limiting rings are fixedly connected to the roller. The two limiting rings abut against the two sides of the protrusion respectively.

[0009] Preferably, the limiting block has a notch, and the inner wall of the notch has a limiting groove. The adjusting bolt passes through the screw hole and abuts against the inner wall of the limiting groove.

[0010] Preferably, the bottom of the limiting groove is arc-shaped.

[0011] Preferably, a support base is provided below the base. The support base includes a support leg, a threaded support rod, and a first nut. The support leg is connected to the bottom end of the threaded support rod, and the first nut is threaded onto the threaded support rod. A through hole is provided on the base, and the top end of the threaded support rod passes through the through hole so that the bottom of the base abuts against the first nut.

[0012] Preferably, a second nut is threaded onto the threaded support rod, the second nut being located below the first nut and abutting against the support leg.

[0013] Preferably, the bottom of the support leg is fixedly connected with a pad.

[0014] Preferably, the load-bearing wheel further includes a drive motor, which drives the shaft to rotate.

[0015] Preferably, a pressure sensor is provided between the support and the base to detect the force on the base or support.

[0016] The second aspect of this application provides a rotating platform, particularly preferably a horizontal rotating platform, comprising a turntable, an annular turntable disposed below the turntable, and any of the aforementioned load-bearing wheels supporting the annular turntable. The turntable and the annular turntable are connected by a connector, and a rotating assembly is provided at the center of the lower part of the turntable, with the top of the rotating assembly connected to the turntable.

[0017] Preferably, there is more than one load-bearing wheel, such as at least two or at least three, all of which are located under the annular turntable. More preferably, at least one of the load-bearing wheels is a drive load-bearing wheel.

[0018] Preferably, the rotating assembly includes a fixed base, a rotating shaft, the bottom end of the rotating shaft being rotatably connected to the fixed base, the top end of the rotating shaft being fixedly connected to a top plate, the top plate being connected to the lower surface of the turntable, and the rotating shaft being connected to the fixed base through a bearing.

[0019] More preferably, the rotary table further includes a first lead screw, a plurality of (i.e. at least two) threaded holes are provided on the top plate, and a threaded groove corresponding to the threaded holes is provided on the bottom of the rotary table. The middle part of the first lead screw is threadedly connected to the threaded hole, and the top end of the first lead screw is threadedly connected to the threaded groove.

[0020] More preferably, the rotating platform further includes a second lead screw, the two ends of which are respectively connected to the rotating shaft and the annular turntable via meshing threads; more preferably, the rotating shaft is arranged radially around the center.

[0021] Preferably, the rotating platform further includes a fixing pin and an adjusting screw. The bottom of the fixing seat is provided with a chassis, and the chassis is provided with through holes around the fixing seat. The fixing pin is inserted into part of the through holes, and the remaining through holes are threaded holes of the chassis. The adjusting screw engages with the threads of the threaded holes of the chassis.

[0022] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0023] 1. This horizontal rotating platform has a rotating component set at the center of the bottom of the turntable, and several driving load-bearing wheels and driven load-bearing wheels arranged around the bottom of the annular turntable, so that the center and near the edge of the turntable are supported and can rotate, making the turntable more stable when rotating. Even if the radius of the turntable is relatively large, it can still remain stable when rotating, thus making it convenient for simulation experiments.

[0024] 2. This horizontal rotating platform allows for adjustment of the support base height, which in turn adjusts the height of the base and support wheels. This facilitates the adjustment of the support wheels of each load-bearing wheel to a uniform height. By loosening the adjusting bolts, the base plate can be moved, thereby adjusting the tilt of the support wheels and ensuring that the top surface of each support wheel remains at a uniform horizontal height. This prevents the support plate from shaking and vibrating when the support wheels rotate, thus keeping the load-bearing wheels stable.

[0025] 3. The horizontal rotating platform is equipped with a pressure sensor between the support seat of the load-bearing wheel and the base. The sensor can detect the pressure on the support wheel from the support plate. When the height of the support wheel of a load-bearing wheel is different from that of the support wheels of other load-bearing wheels, the pressure value detected by the pressure sensor will have a large deviation, which can be easily detected by the functional personnel and adjusted in time. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 This is a bottom view of the structure of the turntable in this invention.

[0028] Figure 3 This is a schematic diagram of the assembly of the rotating shaft and the turntable in this invention.

[0029] Figure 4 This is a schematic diagram of the driven load-bearing wheel in this invention.

[0030] Figure 5 This is a schematic diagram of the structure of the drive load-bearing wheel in this invention.

[0031] Figure 6 This is a schematic diagram of the base structure in this invention.

[0032] Figure 7 This is a bottom view of the bottom plate structure in this invention.

[0033] Figure 8 This is a schematic diagram of the connecting plate and the limiting block in this invention.

[0034] Figure 9This is a schematic diagram of the support base in this invention.

[0035] The meanings of the labels in the diagram are as follows: 1. Base; 20. Base plate; 200. Protrusion; 21. Support plate; 30. Support wheel; 31. Rotating shaft; 40. Roller; 41. Limiting ring; 50. Connecting plate; 51. Limiting block; 510. Notch; 511. Limiting groove; 52. Adjusting bolt; 6. Support seat; 60. Support leg; 61. Threaded support rod; 62. First nut; 63. Second nut; 64. Washer; 70. Pressure sensor; 71. Drive motor; 80. Turntable; 800. Threaded groove; 81. Annular turntable; 82. Connector; 90. Fixed seat; 91. Rotating shaft; 92. Top plate; 920. Threaded hole; 93. First lead screw; 94. Second lead screw; 95. Chassis fixing hole; 96. Chassis threaded hole; 97. Chassis. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a number" means two or more, unless otherwise explicitly specified.

[0039] Example 1:

[0040] A horizontal rotating platform, please refer to Figures 1-9It includes a turntable 80 and an annular turntable 81 located below the turntable 80. A distance is reserved between the turntable 80 and the annular turntable 81. A connecting piece 82 is located between the turntable 80 and the annular turntable 81. The turntable 80 and the annular turntable 81 are connected by the connecting piece 82. The connecting piece 82 is fixed to the bottom of the turntable 80 by one bolt and to the top of the annular turntable 81 by another bolt.

[0041] A rotating assembly is located at the center of the lower part of the turntable 80, and the rotating assembly is connected to the turntable 80 and the annular turntable 81.

[0042] Specifically, the rotating assembly includes a fixed base 90, a rotating shaft 91, a first lead screw 93, and a second lead screw 94. The bottom end of the rotating shaft 91 is rotatably connected to the fixed base 90, and the top end of the rotating shaft 91 is fixedly connected to a top plate 92. The top plate 92 has a plurality of threaded holes 920. In this invention, the threaded holes 920 are preferably three. The bottom of the turntable 80 has a threaded groove 800 corresponding to the threaded holes 920. The number of first lead screws 93 is the same as the number of threaded holes 920. The middle part of the first lead screw 93 is threaded to the threaded hole 920, and the top end of the first lead screw 93 is threaded to the threaded groove 800. The two ends of the second lead screw 94 are respectively connected to the rotating shaft 91 and the annular turntable 81.

[0043] Before the turntable 80 and the annular turntable 81 are connected by the connector, rotating the first lead screw 93 can adjust the gap between the turntable 80 and the top plate 92, thereby adjusting the level or tilt of the turntable 80, so that experimental items can be placed on the turntable 80 as needed, and then the turntable 80 and the annular turntable 81 can be connected by the connector.

[0044] Below the annular turntable 81, there are load-bearing wheels, such as at least three load-bearing wheels, to support the annular turntable 81. Moreover, at least one of the load-bearing wheels can be a driving load-bearing wheel, and the remaining load-bearing wheels are driven load-bearing wheels. The driving load-bearing wheel can drive the annular turntable 81 to rotate, and the driven load-bearing wheels play the role of assisting the rotation of the annular turntable 81.

[0045] It includes a support wheel 30, a base plate 20 and two support plates 21 fixed on the base plate 20. A rotating shaft 31 is rotatably connected between the two support plates 21. The support wheel 30 is connected to the rotating shaft 31. The rotating shaft 31 passes through the central axis of the support wheel 30. The rotating shaft 31 can be an integral design with the support wheel 30 or a detachable design.

[0046] Specifically, the support plate 21 has a U-shaped groove with an opening at the top. The rotating shaft 31 is mounted in the U-shaped groove of the two support plates 21. Bearings are installed on both sides of the support plate 21. The rotating shaft 31 passes through the bearings and is rotatably connected to the bearings. The bearings are clamped to the outside of the support plate 21 by flanges. Alternatively, the support plate 21 has through holes, the bearings are located in the holes, and both ends of the rotating shaft 31 are located inside the bearings and are rotatably connected to the bearings.

[0047] The bottom of the base plate 20 is arc-shaped along the direction of rotation. A base 1 is located below the base plate 20, and two rows of rollers 40 are arranged on the top of the base 1 along the direction of rotation. The arc-shaped surface of the base plate 20 rests on the two rows of rollers 40. Preferably, each row has two or more rollers 40. The central axis of the rollers is perpendicular to the base plate 20. A roller groove is formed on the top of the base 1, and the rollers 40 are placed within the roller groove. For example, the roller groove has a roller shaft groove in the direction perpendicular to the base plate 20, and the roller shaft is mounted within the roller shaft groove, passing through the roller's central axis. The top of the roller 40's surface is located above the roller groove, i.e., extending out of the roller groove. Applying external force to push the base plate 20 will cause the rollers 40 to rotate, thereby adjusting the contact position between the base plate 20 and the rollers 40, and thus adjusting the inclination of the support wheel 30.

[0048] The support wheel 30 is shaped like a frustum. Adjusting the tilt of the support wheel 30 keeps the top of the rotating surface of the support wheel 30 horizontal, thereby keeping the plate placed on the support wheel 30 horizontal. When the support wheel 30 rotates and drives the plate to rotate horizontally, it can maintain greater stability.

[0049] It also includes a limiting component for preventing the base plate 20 from moving along the length of the roller 40; thereby enabling the base plate 20 to be stably adjusted in the rotation direction of the roller 40, preventing the base plate 20 from moving along the length of the roller 40 and causing inconvenience in adjusting the support wheel 30.

[0050] For details, please refer to Figure 7 The limiting component includes a limiting ring 41 and a protrusion 200. The center of the arc-shaped surface of the base plate 20 is concave upward, or the two sides of the base plate 20 protrude downward, so that the two sides of the arc-shaped surface form a protrusion 200. The bottom of the protrusion 200 is an arc-shaped surface. The protrusion 200 is mounted on the roller 40. Two limiting rings 41 are fixedly connected to the roller 40. The two limiting rings 41 abut against the two sides of the protrusion 200 respectively, thereby preventing the base plate from moving along the length direction of the roller 40.

[0051] Please see Figures 7-8The base plate 20 has connecting plates 50 fixedly installed at both ends of the arc-shaped surface by bolts. A limiting block 51 is installed on the base 1 below the connecting plate 50. A notch 510 is opened on the side of the limiting block 51 near the connecting plate 50. A limiting groove 511 is opened on the inner wall of the notch 510 facing the connecting plate 50. A screw hole is opened on the connecting plate 50. The thread of the adjusting bolt 52 engages with the thread of the screw hole. The adjusting bolt 52 extends into the screw hole and abuts against the inner wall of the limiting groove 511. The bottom of the limiting groove 511 is arc-shaped. When the adjusting bolt 52 rotates, the top is always located in the limiting groove 511 and will not shift or tilt, thereby maintaining the accuracy of adjustment.

[0052] When the adjusting bolt 52 abuts against the limiting groove 511, the base plate 20 can be fixed, thus preventing the base plate 20 from moving back and forth on the roller 40. When it is necessary to adjust the support wheel 30, loosen or tighten the adjusting bolts 52 at both ends of the arc surface of the base plate 20. Driven by the adjusting bolts 52, the connecting plate 50 moves away from or closer to the limiting groove. At this time, the adjusting bolts 52 can push the base plate 20 to move through the connecting plate 50, thereby adjusting the tilt angle of the support wheel 30 and keeping the top of the wheel surface of the support wheel 30 horizontal.

[0053] Example 2:

[0054] Please see Figure 5 and Figure 9 The base 1 is provided with a support seat 6 with adjustable support height. Specifically, the support seat 6 includes a support leg 60, a threaded support rod 61 and a first nut 62. The support leg 60 can be fixedly connected to the bottom end of the threaded support rod 61. The first nut 62 is threadedly engaged with the threaded support rod 61. The base 1 is provided with a through hole. The top end of the threaded support rod 61 passes through the through hole so that the bottom of the base 1 abuts against the first nut 62.

[0055] When the height of the base needs to be adjusted, the first nut 62 is rotated to move it upward, which can move the base 1 upward. The first nut 62 is rotated to move it downward, which can move the base 1 downward, thereby adjusting the height of the base. When the height of the base changes, the height of the support wheel 30 also changes synchronously.

[0056] A second nut 63 is threadedly engaged with the threaded support rod 61. The second nut 63 is located below the first nut 62 and abuts against the support leg 60. When the first nut 62 supports the base 1, rotating the second nut 63 moves it upward, and the threaded support rod 61 extends further downward into the support leg 60 (at this time, the threaded support rod 61 and the support leg 60 are not fixedly connected) until the second nut 63 abuts against the support leg 60 again, thereby adjusting the length of the threaded support rod 61.

[0057] During installation, the support leg 60 is fixed to the support surface, which can be other support mechanisms or the ground. Slightly rotate the first nut 62 and / or the second nut 63 to bring the base 1 into a horizontal plane. Depending on the weight or size of the plate to be supported at the top, place it on the support wheels 30 of the load-bearing wheels in this embodiment, and tighten or loosen the adjusting bolts to adjust the front-rear position of the base plate 20, thereby controlling the inclination of the top surface of the support wheels 30.

[0058] During use, if the bases 1 of the various load-bearing wheels are subjected to uneven force or have different tilt angles, the posture of the support wheels 30 can be adjusted by adjusting the bolts.

[0059] A pad 64 is fixedly connected to the bottom of the support leg 60. The pad 64 is made of rubber material and can stably fix the support leg 60 to the support surface when the support leg is installed.

[0060] It should be added that multiple of the above-mentioned load-bearing wheels are required in actual use. The load-bearing wheels are arranged in a ring on the support surface, and then the support plate is placed on the support wheel 30 of the load-bearing wheels. At this time, the rotation of the support wheel 30 can drive the support plate to move.

[0061] Before the annular turntable moves on the load-bearing wheels, it is necessary to ensure that the supporting plate abuts against the top surface of the support wheel 30 of each load-bearing wheel. A pressure sensor 70 is provided between the support base 6 and the base 1. The pressure sensor 70 has a round hole in the middle, through which the threaded support rod can pass. The pressure sensor 70 is located between the base 1 and the first nut 62. When the base 1 presses on the pressure sensor 70, the pressure sensor 70 can detect the pressure value. When the support wheel 30 of a load-bearing wheel is not pressed down by the supporting plate, the pressure value detected by the pressure sensor 70 is significantly different from the pressure values ​​detected by the pressure sensors 70 on other load-bearing wheels. This allows the support wheel 30 to abut against the support plate, ensuring that the support wheel 30 on each load-bearing wheel maintains the same height, thereby keeping the annular turntable horizontal and the turntable level. This makes the items placed on the top of the turntable more stable when the turntable rotates.

[0062] Example 3:

[0063] Based on Example 1 or 2, refer to Figures 1-3The rotating platform also includes a fixing pin and an adjusting pin. The bottom of the fixed base has a base 97, which has through holes surrounding the fixed base 90. Part of these through holes are base fixing holes 95 into which the fixing pin is inserted, while the remaining through holes are base threaded holes 96. The adjusting pin engages with the threads of the base threaded holes 96. The fixing pin secures the base 97, thereby securing the fixed base 90. The adjusting pin adjusts the contact tightness between the base 97 and the underlying bearing surface (such as the ground), thus adjusting the levelness of the base 97 and the fixed base 90. The base fixing holes 95 and the base threaded holes can be spaced apart.

[0064] Example 4:

[0065] Based on any of the above embodiments, a drive motor 71 is added to the drive bearing wheel relative to the driven bearing wheel. The drive motor 71 drives the rotating shaft 31 to rotate, thereby causing the support wheel 30 to rotate. Thus, the support wheel 30 can be used as a drive wheel or a power wheel to drive the movement of the annular turntable and the turntable.

[0066] It should be noted that the present invention provides a rotating component at the center of the turntable 80, and a number of driving load-bearing wheels and driven load-bearing wheels are arranged around the bottom of the annular turntable 81, so that the center and near the edge of the turntable 80 are supported and can rotate, making the turntable more stable when rotating. Even if the radius of the turntable is relatively large, it can still remain stable when rotating, thus making it convenient for simulation experiments.

[0067] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A load-bearing wheel, characterized in that, The system includes a support wheel (30), a base plate (20), and two support plates (21) fixed on the base plate (20). A rotating shaft (31) is rotatably connected between the two support plates (21). The support wheel (30) is connected to the rotating shaft (31), and the rotating shaft (31) passes through the central axis of the support wheel (30). The bottom of the base plate (20) is an arc-shaped surface along the direction of the rotating shaft. A base (1) is provided below the base plate (20), and two rows of rollers (40) are provided on the top of the base (1) along the direction of the rotating shaft. The arc-shaped surface of the base plate (20) is supported on the two rows of rollers (40). A connecting plate (50) is installed at both ends of the arc-shaped surface of the base plate (20). A limit block (51) is installed on the base (1) below the connecting plate (50). The connecting plate (50) is provided with a screw hole. An adjusting bolt (52) passes through the screw hole and abuts against the limit block (51). The adjusting bolt (52) engages with the screw hole through a thread.

2. A load-bearing wheel according to claim 1, characterized in that: The load-bearing wheel also includes a limiting component for preventing the base plate from moving along the length of the roller (40).

3. A load-bearing wheel according to claim 2, characterized in that: The limiting component includes a limiting ring (41) and a protrusion (200). The center of the arc surface of the base plate (20) is recessed upward so that the two sides of the arc surface form the protrusion (200). The protrusion (200) is mounted on the roller (40). Two limiting rings (41) are fixedly connected to the roller (40). The two limiting rings (41) abut against the two sides of the protrusion (200) respectively.

4. A load-bearing wheel according to claim 1, characterized in that: The limiting block (51) has a notch (510) and a limiting groove (511) is formed on the inner wall of the notch (510). The adjusting bolt (52) passes through the screw hole and abuts against the inner wall of the limiting groove (511).

5. A rotating platform, characterized in that: It includes a turntable (80), an annular turntable (81) located below the turntable (80), and a load-bearing wheel as described in claim 1 supporting the annular turntable (81); the turntable (80) and the annular turntable (81) are connected by a connector (82), and a rotating component is provided at the center of the lower part of the turntable (80), with the top of the rotating component connected to the turntable (80).

6. A rotating platform according to claim 5, characterized in that: The rotating assembly includes a fixed base (90), a rotating shaft (91), the bottom end of the rotating shaft (91) is rotatably connected to the fixed base (90), the top end of the rotating shaft (91) is fixedly connected to a top plate (92), the top plate (92) is connected to the lower surface of the turntable (80), and the rotating shaft (91) is connected to the fixed base (90) through a bearing.

7. A rotating platform according to claim 6, characterized in that: The horizontal rotating platform also includes a first lead screw (93), a number of threaded holes (920) are provided on the top plate (92), and a threaded groove (800) corresponding to the threaded holes (920) is provided on the bottom of the turntable (80). The middle part of the first lead screw (93) is threaded to the threaded hole (920), and the top end of the first lead screw (93) is threaded to the threaded groove (800).

8. A rotating platform according to claim 6, characterized in that: The rotating platform also includes a second lead screw (94), the two ends of which are connected to the rotating shaft (91) and the annular turntable (81) by threads, respectively.

9. A rotating platform according to claim 6, characterized in that: The rotating platform also includes a fixing pin and an adjusting screw. The bottom of the fixing seat (90) is provided with a chassis (97). The chassis is provided with through holes around the fixing seat (90). The fixing pin is inserted into part of the through holes, and the remaining through holes are threaded holes of the chassis. The adjusting screw engages with the threaded holes of the chassis.

10. A rotating platform according to claim 5, characterized in that: There is more than one load-bearing wheel, and all of them are located below the annular turntable (81). At least one load-bearing wheel is equipped with a drive motor (71), which drives the rotating shaft (31) to rotate.

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