A three-dimensional scanning and mapping device for building structures and its supporting structure

Abstract

The present invention relates to the technical field of surveying and mapping equipment, and specifically relates to a three-dimensional scanning surveying and mapping equipment for building structures and its supporting structure, including a mounting frame. The outer wall of the top of the mounting frame is fixedly connected with three support plates, and the outer wall of the top of the support plate is fixedly connected with a workbench. Three mounting grooves are formed in the outer wall of the mounting frame, and further includes a support mechanism, which is arranged on the outer wall of the mounting frame. The support mechanism includes a rotating shaft rotatably arranged on the inner wall of the mounting groove and a control disk rotatably arranged on the inner wall of the bottom of the mounting frame. A sleeve is fixedly connected to the outer wall of the rotating shaft. Once the structure is bent or inclined, through the cooperation of the laser emitter and the receiver, observe whether the light strip on the support leg lights up, so as to control the hydraulic rod in the corresponding support tube, and make the support foot extend to an appropriate length. A single person can quickly complete the horizontal adjustment operation of the surveying and mapping, improving the use efficiency of the three-dimensional scanning surveying and mapping equipment and its supporting structure.

Description

Technical Field

[0001] The present invention relates to the technical field of surveying and mapping equipment, and specifically to a three-dimensional scanning surveying and mapping equipment for building structures and its supporting structure. Background Technique

[0002] A three-dimensional laser scanner is a measuring device that can quickly obtain the high-precision three-dimensional coordinates of the object to be measured and then construct a high-precision three-dimensional model. The fixing structure of the scanning surveying and mapping equipment is not perfect. Since the scanner is usually fixed to the support frame by bolts, during use, the installation and disassembly of the scanner are too troublesome, which is inconvenient for the installation and maintenance of the scanner, resulting in poor practicability of the surveying and mapping device.

[0003] After searching, the Chinese patent with the publication number CN215831507U discloses a three-dimensional laser scanner for the internal structure of building surveying and mapping. During use, pull the insertion rod outward, insert the fixing rod vertically into the circular through hole in the bottom plate. At this time, release the insertion rod, so that the elastic member pushes the insertion rod to move inward and inserts into the positioning hole in the fixing rod, so that the fixing plate with the scanner on the top can be fixed. By replacing the positioning hole where the insertion rod is inserted into the fixing rod, the installation height of the fixing plate can be adjusted.

[0004] Based on the above search and in combination with the prior art, it is found that: when the three-dimensional scanning surveying and mapping equipment is working, it needs to be kept horizontal, and the lengths of different support legs are adjusted according to the specific ground conditions to keep the surveying and mapping equipment in a horizontal state all the time. However, after adjusting one support leg each time, it is necessary to observe whether the spirit level is horizontal and then bend down to adjust other support legs. The single-person surveying and adjustment operation is complex, and it is impossible to simultaneously control the locking or unlocking of the three support legs, reducing the use efficiency of the three-dimensional scanning surveying and mapping equipment and its supporting structure. Summary of the Invention

[0005] The purpose of the present invention is to provide a three-dimensional scanning surveying and mapping equipment for building structures and its supporting structure to solve the problems raised in the above background technique.

[0006] The technical solution of the present invention is: a supporting structure, including an installation frame, the outer wall of the top end of the installation frame is fixedly connected with three support plates, the outer wall of the top end of the support plate is fixedly connected with a workbench, and three installation grooves are opened on the outer wall of the installation frame, and further includes;

[0007] A support mechanism, the support mechanism is arranged on the outer wall of the installation frame;

[0008] The support mechanism includes a rotating shaft rotatably arranged on the inner wall of the installation groove and a control disk rotatably arranged on the bottom inner wall of the mounting frame. A sleeve is fixedly connected to the outer wall of the rotating shaft, a support pipe is fixedly connected to the outer wall of the sleeve, a hydraulic rod is installed on the bottom inner wall of the support pipe, one end of the piston rod of the hydraulic rod is fixedly connected with a support foot, the support foot is slidably connected to the inner wall of the support pipe, rectangular grooves are formed on the outer walls on both sides of the support pipe, a light strip is installed on the inner wall of the rectangular groove, an annular plate is fixedly connected to the top outer wall of the control disk, a rack is fixedly connected to the top outer wall of the annular plate, three rotating rods are rotatably arranged on the top inner wall of the mounting frame, a first transmission wheel is fixedly connected to the outer wall on one side of the rotating shaft, a second transmission wheel is fixedly connected to the outer wall on one side of the rotating rod, and a bevel gear is fixedly connected to the outer wall on the other side of the rotating rod.

[0009] A horizontal control mechanism is arranged on the outer wall of the mounting frame.

[0010] The horizontal control mechanism includes a mounting plate fixedly connected to the top inner wall of the mounting frame and a steel wire rope fixedly connected to the bottom outer wall of the workbench. Three receivers are installed on the top outer wall of the mounting plate, a microcontroller is installed on the bottom outer wall of the mounting plate, and a laser emitter is installed on the bottom outer wall of the steel wire rope.

[0011] Preferably, the support plate, the receivers and the rotating shaft are distributed in an annular array. The receivers are fan-shaped, the rack is annular, the rack meshes with the bevel gear, a transmission belt is wound around the outer walls of the first transmission wheel and the second transmission wheel, an annular protrusion is arranged on the bottom inner wall of the mounting frame, and the control disk and the rack are slidably connected to the outer wall of the annular protrusion.

[0012] Preferably, a power switch is installed on the outer wall of the mounting frame, several control buttons are installed on the outer wall of the mounting frame, the power switch, the control buttons and the receivers are electrically connected to the microcontroller, and the light strip and the hydraulic rod are electrically connected to the microcontroller.

[0013] Preferably, a fixing block is fixedly connected to the outer wall on one side of the control disk, a limiting hole is formed in the bottom outer wall of the fixing block, a locking knob is connected to the inner wall of the limiting hole by a thread, and a handle is fixedly connected to the outer wall on one side of the bottom of the control disk.

[0014] Preferably, a circular hole is formed in the outer wall on one side of the support plate, a support rod is slidably connected to the inner wall of the circular hole, an arc-shaped plate is fixedly connected to the outer wall on one side of the support rod, and a protection plate is fixedly connected to the outer wall on the other side of the support rod.

[0015] Preferably, a spring is sleeved on the outer wall of the other side of the support rod. Both ends of the spring are fixedly connected to the outer walls of the protective plate and the support plate respectively. One side of the outer wall of the bottom of the protective plate is fixedly connected with a buffer pad, and an arc-shaped groove is formed on one side of the outer wall of the buffer pad. The arc-shaped groove is adapted to the size of the laser emitter.

[0016] Preferably, three semi-circular grooves are formed on the outer wall of the workbench. The semi-circular grooves are distributed in a circular array. A magnetic block is fixedly connected to the inner wall of the semi-circular groove. The magnetic block is semi-circular in shape and is adapted to the size of the support tube. A motor is installed on the inner wall of the workbench, and one end of the output shaft of the motor is connected to a turntable through a coupling.

[0017] The present invention also discloses a three-dimensional scanning and mapping device for building structures, which includes a support structure as described in any one of the above, and further includes a main body, and the main body is installed on the top outer wall of the turntable.

[0018] The present invention provides a three-dimensional scanning and mapping device for building structures and its support structure by making improvements. Compared with the prior art, the following improvements and advantages are achieved:

[0019] First: The present invention is provided with a mounting rack, a workbench, a laser emitter, a receiver, a support tube, a hydraulic rod and a support foot. By driving the rotation of three bevel gears through a rack, the rotation of three support legs is synchronously controlled for angle adjustment, and all support legs are locked or unlocked. When adjusting the horizontal state of the mapping structure, once the structure is bent or inclined, through the cooperation of the laser emitter and the receiver, observe whether the light strip on the support leg lights up, and then control the hydraulic rod in the corresponding support tube to make the support foot extend to an appropriate length. A single person can quickly complete the horizontal adjustment operation of the mapping, improving the use efficiency of the three-dimensional scanning and mapping device and its support structure;

[0020] Second: The present invention is provided with a mounting rack, a support tube, a workbench and a magnetic block. When it needs to be stored and transported after use, loosen the locking knob on the fixing block, push the control panel to rotate in the reverse direction through the handle, the rack drives the bevel gear to rotate in the reverse direction, so that the rotating shaft drives the support tube to rotate upward and connect with the magnetic block on the workbench. The magnetic block adsorbs and fixes the support tube, and the support foot is retracted into the support tube by the hydraulic rod. It can be placed stably in the reverse direction, minimizing the occupied space to the greatest extent and improving the convenience of the three-dimensional scanning and mapping device and its support structure;

[0021] Thirdly: The present invention is provided with an arc-shaped block, a support rod, a spring, a protective plate and a buffer pad. When the support tube rotates downward to land and support, the arc-shaped plate and the support rod slide outward reset under the action of the spring, and the three protective plates are separated to release the laser emitter. When the surveying and mapping is completed and the support tube rotates upward, when it is adsorbed and fixed by the magnet on the workbench, the support tube also presses on the arc-shaped plate, and the support rod drives the protective plate to move and close. The protective plate cooperates with the buffer pad to wrap and limit the laser emitter, preventing the laser emitter from shaking, knocking and being damaged during placement and storage, and improving the safety of the three-dimensional scanning and surveying equipment and its support structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further explained below with reference to the drawings and embodiments:

[0023] Figure 1 is a schematic diagram of the unfolded state of the overall structure of the present invention;

[0024] Figure 2 is a schematic diagram of the stored state of the overall structure of the present invention;

[0025] Figure 3 is an exploded schematic diagram of the connection structure of the mounting bracket of the present invention;

[0026] Figure 4 is a schematic diagram of the bevel gear of the present invention;

[0027] Figure 5 is a schematic diagram of the control panel of the present invention;

[0028] Figure 6 is a schematic diagram of the mounting bracket of the present invention;

[0029] Figure 7 is an exploded schematic diagram of the connection structure of the support tube of the present invention;

[0030] Figure 8 is a schematic diagram of the workbench of the present invention;

[0031] Figure 9 is a schematic diagram of the protective plate of the present invention.

[0032] Description of the reference numerals:

[0033] 1. Mounting frame; 2. Workbench; 3. Turntable; 4. Body; 5. Magnet block; 6. Support plate; 7. Support rod; 8. Arc plate; 9. Rotating shaft; 10. Sleeve; 11. Power switch; 12. Control button; 13. Support tube; 14. Light strip; 15. Support foot; 16. Mounting plate; 17. Receiver; 18. Microcontroller; 19. Handle; 20. First driving wheel; 21. Control panel; 22. Rack; 23. Fixed block; 24. Locking knob; 25. Second driving wheel; 26. Bevel gear; 27. Rotating rod; 28. Annular protrusion; 29. Hydraulic rod; 30. Spring; 31. Protective plate; 32. Laser emitter; 33. Steel wire rope; 34. Buffer pad. Detailed implementation manners

[0034] 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.

[0035] The present invention provides a support structure by improvement. The technical solution of the present invention is as follows: Embodiment 1

[0036] As Figures 1-9 shown, a support structure thereof includes a mounting frame 1. Three support plates 6 are fixedly connected to the outer wall of the top end of the mounting frame 1. A workbench 2 is fixedly connected to the outer wall of the top end of the support plate 6. Three mounting grooves are formed in the outer wall of the mounting frame 1. It further includes;

[0037] A support mechanism is arranged on the outer wall of the mounting frame 1;

[0038] The support mechanism includes a rotating shaft 9 rotatably arranged on the inner wall of the mounting groove and a control panel 21 rotatably arranged on the inner wall of the bottom of the mounting frame 1. A sleeve 10 is fixedly connected to the outer wall of the rotating shaft 9. A support tube 13 is fixedly connected to the outer wall of the sleeve 10. A hydraulic rod 29 is installed on the inner wall of the bottom of the support tube 13. One end of the piston rod of the hydraulic rod 29 is fixedly connected to a support foot 15. The support foot 15 is slidably connected to the inner wall of the support tube 13. Rectangular grooves are formed in the outer walls on both sides of the support tube 13. A light strip 14 is installed on the inner wall of the rectangular groove. An annular plate is fixedly connected to the outer wall of the top end of the control panel 21. A rack 22 is fixedly connected to the outer wall of the top end of the annular plate. Three rotating rods 27 are rotatably arranged on the inner wall of the top of the mounting frame 1. A first driving wheel 20 is fixedly connected to the outer wall of one side of the rotating shaft 9. A second driving wheel 25 is fixedly connected to the outer wall of one side of the rotating rod 27. A bevel gear 26 is fixedly connected to the outer wall of the other side of the rotating rod 27;

[0039] A horizontal control mechanism is arranged on the outer wall of the mounting frame 1;

[0040] The horizontal control mechanism includes a mounting plate 16 fixedly connected to the inner wall of the top of the mounting frame 1 and a steel wire rope 33 fixedly connected to the outer wall of the bottom end of the workbench 2. Three receivers 17 are installed on the outer wall of the top end of the mounting plate 16, a microcontroller 18 is installed on the outer wall of the bottom end of the mounting plate 16, and a laser emitter 32 is installed on the outer wall of the bottom end of the steel wire rope 33.

[0041] Furthermore, the support plate 6, the receivers 17 and the rotating shaft 9 are distributed in a circular array. The receivers 17 are arranged in a fan shape, the rack 22 is arranged in a circular shape, the rack 22 meshes with the bevel gear 26, a transmission belt is wound around the outer walls of the first transmission wheel 20 and the second transmission wheel 25, a circular protrusion 28 is provided on the inner wall of the bottom of the mounting frame 1, the control disk 21 and the rack 22 are slidably connected to the outer wall of the circular protrusion 28, a power switch 11 is installed on the outer wall of the mounting frame 1, several control buttons 12 are installed on the outer wall of the mounting frame 1, the power switch 11, the control buttons 12 and the receivers 17 are electrically connected to the microcontroller 18, and the lamp strip 14 and the hydraulic rod 29 are electrically connected to the microcontroller 18.

[0042] Furthermore, a fixing block 23 is fixedly connected to the outer wall of one side of the control disk 21. A limiting hole is provided on the outer wall of the bottom end of the fixing block 23, and a locking knob 24 is connected to the inner wall of the limiting hole by means of a thread. A handle 19 is fixedly connected to the outer wall of one side of the bottom end of the control disk 21. A circular hole is provided on the outer wall of one side of the support plate 6, a support rod 7 is slidably connected to the inner wall of the circular hole, an arc-shaped plate 8 is fixedly connected to the outer wall of one side of the support rod 7, and a protection plate 31 is fixedly connected to the outer wall of the other side of the support rod 7.

[0043] Furthermore, a spring 30 is sleeved on the outer wall of the other side of the support rod 7. The two ends of the spring 30 are respectively fixedly connected to the outer walls of the protection plate 31 and the support plate 6. A buffer pad 34 is fixedly connected to the outer wall of one side of the bottom of the protection plate 31. An arc-shaped groove is provided on the outer wall of one side of the buffer pad 34, and the size of the arc-shaped groove is adapted to that of the laser emitter 32. Three semi-circular grooves are provided on the outer wall of the workbench 2, and the semi-circular grooves are distributed in a circular array. A magnetic block 5 is fixedly connected to the inner wall of the semi-circular groove, the magnetic block 5 is arranged in a semi-circular shape, and the size of the magnetic block 5 is adapted to that of the support tube 13. A motor is installed in the inner wall of the workbench 2. One end of the output shaft of the motor is connected to a turntable 3 through a coupling. When the surveying and mapping is completed, the support tube 13 rotates upward. When the support tube 13 is adsorbed and fixed by the magnetic block 5 on the workbench 2, the support tube 13 also presses the arc-shaped plate 8. The support rod 7 drives the protection plate 31 to move and close. The protection plate 31 cooperates with the buffer pad 34 to wrap and limit the laser emitter 32, preventing the laser emitter 32 from being damaged due to shaking and bumping during storage. Embodiment 2

[0044] Such as Figure 1 、 Figure 2 And Figure 8As shown in the figure, a three-dimensional scanning and mapping device for building structures includes the above-mentioned support structure and also includes a main body 4, which is installed on the top outer wall of the turntable 3.

[0045] Working principle: When performing three-dimensional scanning and mapping of building structures, adjust the support structure on which the main body 4 is placed to keep it in a horizontal state. Hold the handle 19 on the control panel 21 at the bottom of the mounting frame 1 and push the control panel 21 to rotate, which drives the rack 22 to rotate. The rack 22 drives the rotation of three rotating rods 27 through the meshing bevel gears 26, thereby driving the rotation of the second transmission wheel 25. The second transmission wheel 25 then drives the rotation of the first transmission wheel 20 through the transmission belt, thereby driving the rotation of three rotating shafts 9. The three support tubes 13 rotate synchronously to adjust the angle. The support tubes 13 drive the support feet 15 to rotate and adjust downward to the appropriate angle and then land for support. Limit the control panel 21 through the locking knob 24. After externally connecting the power supply, turn on the power switch 11. The laser transmitter 32 connected to the steel wire rope 33 at the bottom of the workbench 2 emits laser light to level the surveying and mapping device. Three sector-shaped receivers 17 are arranged on the top of the mounting plate 16. The receivers 17 can be spliced into a ring. The three receivers 17 respectively correspond to the light strips 14 on the three support tubes 13. When the mounting frame 1 is not in a horizontal state and is tilted, the laser transmitter 32 will also be tilted, and the emitted laser light will irradiate on the receivers 17 at the corresponding positions. The receivers 17 receive the signal and transmit it to the microcontroller 18. The microcontroller 18 controls the light strips 14 on the corresponding support tubes 13 to light up. The staff can press the control button 12 on the mounting frame 1 according to the light strips 14 that light up on the corresponding support tubes 13, so that the hydraulic rod 29 in the support tube 13 where the light strip 14 lights up acts. The hydraulic rod 29 ejects the support foot 15 to increase the length of the support leg until the light strips 14 on all the support tubes 13 no longer light up. Repeat the operation until the light strips 14 on all the support tubes 13 no longer light up, indicating that the laser transmitter 32 emits laser light vertically downward and does not irradiate on any receiver 17, and the mounting frame 1 is in a horizontal state.

[0046] When it needs to be stored and transported after use, loosen the locking knob 24 on the fixing block 23, and push the control panel 21 to rotate in the reverse direction through the handle 19. The rack 22 drives the bevel gear 26 to rotate in the reverse direction, so that the rotating shaft 9 drives the support tube 13 to rotate upward and connect with the magnet 5 on the workbench 2. The magnet 5 adsorbs and fixes the support tube 13. The support foot 15 is retracted into the support tube 13 by the hydraulic rod 29. Placing it in the reverse direction can maintain stability and minimize the occupied space to the greatest extent.

[0047] A support rod 7 is slidably connected to the support plate 6. An arc-shaped plate 8 is arranged on one side of the support rod 7, and a protection plate 31 is arranged on the other side of the support rod 7. When the support tube 13 rotates downward to land and support, the arc-shaped plate 8 and the support rod 7 slide outwardly under the action of the spring 30. The suction force between the magnet 5 and the support tube 13 is greater than the elastic force of the spring 30, and the three protection plates 31 are separated to release the laser emitter 32. When the surveying and mapping is completed and the support tube 13 rotates upward, when the support tube 13 is adsorbed and fixed by the magnet 5 on the workbench 2, the support tube 13 also presses on the arc-shaped plate 8. The support rod 7 drives the protection plate 31 to move and close. The protection plate 31 cooperates with the buffer pad 34 to wrap and limit the laser emitter 32, preventing the laser emitter 32 from being damaged due to shaking during placement and storage.

[0048] The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed by the above technical means, but also include technical solutions composed of equivalent replacements of the above technical features. The matters not covered in the present invention belong to the common general knowledge of those skilled in the art.

Claims

1. A support structure, comprising a mounting frame (1), wherein the top outer wall of the mounting frame (1) is fixedly connected to three support plates (6), the top outer wall of the support plate (6) is fixedly connected to a workbench (2), and the outer wall of the mounting frame (1) is provided with three mounting grooves, characterized in that: Also includes; A supporting mechanism, the supporting mechanism being arranged on an outer wall of the mounting frame (1); The support mechanism comprises a rotating shaft (9) rotatably arranged on the inner wall of the mounting groove and a control panel (21) rotatably arranged on the inner wall of the bottom of the mounting frame (1); the outer wall of the rotating shaft (9) is fixedly connected to a sleeve (10); the outer wall of the sleeve (10) is fixedly connected to a support tube (13); a hydraulic rod (29) is installed on the inner wall of the bottom of the support tube (13); one end of the piston rod of the hydraulic rod (29) is fixedly connected to a support foot (15); the support foot (15) is slidably connected to the inner wall of the support tube (13); both ends of the support tube (13) are fixedly connected to the inner wall of the support tube (13); A rectangular groove is provided on the side outer wall, a light strip (14) is installed on the inner wall of the rectangular groove, a ring plate is fixedly connected to the top outer wall of the control panel (21), a rack (22) is fixedly connected to the top outer wall of the ring plate, three rotating rods (27) are rotatably arranged on the top inner wall of the mounting frame (1), a transmission wheel 1 (20) is fixedly connected to the outer wall of one side of the rotating shaft (9), a transmission wheel 2 (25) is fixedly connected to the outer wall of one side of the rotating rod (27), and a bevel gear (26) is fixedly connected to the outer wall of the other side of the rotating rod (27); A horizontal control mechanism, wherein the horizontal control mechanism is arranged on an outer wall of the mounting frame (1); The horizontal control mechanism comprises a mounting plate (16) fixedly connected to the top inner wall of the mounting frame (1) and a steel wire rope (33) fixedly connected to the bottom outer wall of the workbench (2); three receivers (17) are mounted on the top outer wall of the mounting plate (16); a microcontroller (18) is mounted on the bottom outer wall of the mounting plate (16); a laser transmitter (32) is mounted on the bottom outer wall of the steel wire rope (33); a circular hole is formed on one side outer wall of the support plate (6); a support rod (7) is slidably connected to the inner wall of the circular hole; an arc plate (8) is fixedly connected to the outer wall of one side of the support rod (7); a protective plate (31) is fixedly connected to the outer wall of the other side of the support rod (7); and a sleeve is provided on the outer wall of the other side of the support rod (7). A spring (30) is provided, the two ends of the spring (30) being fixedly connected to the outer wall of the protective plate (31) and the support plate (6) respectively; a buffer pad (34) is fixedly connected to the outer wall of one side of the bottom of the protective plate (31); an arc groove is provided on the outer wall of one side of the buffer pad (34); the arc groove is adapted to the size of the laser emitter (32); three semicircular grooves are provided on the outer wall of the workbench (2); the semicircular grooves are distributed in a ring array; a magnetic block (5) is fixedly connected to the inner wall of the semicircular groove; the magnetic block (5) is arranged in a semicircular shape; the magnetic block (5) is adapted to the size of the support tube (13); a motor is installed on the inner wall of the workbench (2); one end of the motor output shaft is connected to the turntable (3) via a coupling.

2. A support structure according to claim 1, characterized in that: The support plate (6), the receiver (17) and the rotating shaft (9) are distributed in an annular array, the receiver (17) is arranged in a fan shape, the rack (22) is arranged in an annular shape, the rack (22) is meshed with a bevel gear (26), a transmission belt is wound around the outer walls of the transmission wheel 1 (20) and the transmission wheel 2 (25), an annular protrusion (28) is arranged on the inner wall of the bottom of the mounting frame (1), and the control plate (21) and the rack (22) are slidably connected to the outer wall of the annular protrusion (28).

3. A support structure according to claim 1, characterized in that: A power switch (11) is installed on the outer wall of the mounting frame (1), and a plurality of control buttons (12) are installed on the outer wall of the mounting frame (1); the power switch (11), the control buttons (12) and the receiver (17) are electrically connected to a microcontroller (18), and the light strip (14) and the hydraulic rod (29) are electrically connected to the microcontroller (18).

4. A support structure according to claim 1, characterized in that: A fixing block (23) is fixedly connected to an outer wall of one side of the control panel (21), a limit hole is provided on the outer wall of the bottom end of the fixing block (23), a locking knob (24) is threadedly connected to the inner wall of the limit hole, and a handle (19) is fixedly connected to an outer wall of one side of the bottom end of the control panel (21).

5. A three-dimensional scanning and mapping device for building structures, comprising a supporting structure as claimed in any one of claims 1 to 4, characterized in that: It also comprises a body (4), wherein the body (4) is mounted on the top outer wall of the turntable (3).

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