CN113595490A

CN113595490A - Solar energy folded sheet for new forms of energy exploitation

Info

Publication number: CN113595490A
Application number: CN202110957864.2A
Authority: CN
Inventors: 袁凤琼
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-20
Filing date: 2021-08-20
Publication date: 2021-11-02

Abstract

The invention relates to the technical field of new energy, in particular to a solar folding plate for new energy exploitation, which is convenient for accommodating a folding solar panel, reduces the damage of the solar panel caused by severe weather, and prolongs the service life of the solar panel; the method comprises the following steps: the adjustable storage device comprises an adjusting base and a storage barrel, wherein the storage barrel is arranged on the adjusting base, the adjusting base is used for adjusting the orientation of the storage barrel, a transmission bin is communicated with the storage barrel, a plurality of groups of mounting grooves are uniformly arranged on the outer wall of the transmission bin in a penetrating manner, a plurality of groups of accommodating grooves are arranged on the outer wall of the storage barrel in a penetrating manner corresponding to the plurality of groups of mounting grooves, and the plurality of groups of mounting grooves are communicated with the plurality of groups of accommodating grooves; the solar panel comprises a plurality of groups of unfolding arms and a solar panel, wherein the plurality of groups of unfolding arms are respectively and rotatably installed in the plurality of groups of installation grooves, and at least two groups of spring hinges are arranged on two sides of each group of unfolding arms; two sets of solar panel are installed in the both sides of exhibition arm respectively the symmetry through a plurality of groups spring hinge, and the spring hinge is used for making two sets of solar panel be fold condition under no exogenic action.

Description

Solar energy folded sheet for new forms of energy exploitation

Technical Field

The invention relates to the technical field of new energy, in particular to a solar folding plate for new energy exploitation.

Background

The solar panel is an assembly assembled by a plurality of solar cells, is a core part in a solar power generation system, and is also the most important part in the solar power generation system;

current solar panel adopts the straight plate type installation mostly, and is unable folding, when meetting bad weather such as hail thunder and lightning, is difficult to guarantee solar panel's integrality, seriously influences solar panel's life.

Disclosure of Invention

In order to solve the technical problems, the invention provides the solar folding plate for new energy exploitation, which is convenient for accommodating the folding solar panel, reduces the damage of the solar panel caused by severe weather, and prolongs the service life of the solar panel.

The invention relates to a solar folding plate for new energy exploitation, which comprises:

the adjustable storage device comprises an adjusting base and a storage barrel, wherein the storage barrel is arranged on the adjusting base, the adjusting base is used for adjusting the orientation of the storage barrel, a transmission bin is arranged on the storage barrel in a communication mode, a plurality of groups of mounting grooves are uniformly arranged on the outer wall of the transmission bin in a penetrating mode, a plurality of groups of accommodating grooves are arranged on the outer wall of the storage barrel in a penetrating mode corresponding to the plurality of groups of mounting grooves, and the plurality of groups of mounting grooves are communicated with the plurality of groups of accommodating grooves;

the solar folding device comprises a plurality of groups of unfolding arms and a solar panel, wherein the plurality of groups of unfolding arms are respectively rotatably installed in a plurality of groups of installation grooves, and at least two groups of spring hinges are arranged on two sides of each group of unfolding arms; the two groups of solar panels are symmetrically arranged on two sides of the unfolding arm respectively through a plurality of groups of spring hinges, and the spring hinges are used for enabling the two groups of solar panels to be in a folded state under the condition of no external force;

the unfolding device is fixedly arranged at the top end of the transmission bin and is used for supporting the two groups of solar panels in a folded state on each group of unfolding arms to be unfolded when the plurality of groups of unfolding arms synchronously rotate to the same plane;

the transmission bin is internally provided with a driving device for driving a plurality of groups of display arms to synchronously rotate along the joint of the transmission bin and the transmission bin.

Further, the containing barrel is a conical barrel.

Furthermore, a bevel gear is arranged at the joint of the spreading arm and the transmission bin, connecting shafts are coaxially and fixedly arranged on two sides of the bevel gear, and the bevel gear is rotatably arranged in the mounting groove by virtue of the connecting shafts;

the driving device comprises a transmission shaft and an inner pipe, wherein the transmission shaft is coaxially and rotatably installed inside the transmission bin, the inner pipe is fixedly installed inside the storage barrel, the transmission shaft is meshed with a plurality of groups of bevel gears, a first motor is fixedly installed inside the inner pipe, the first motor is used for driving the transmission shaft to rotate along the axis of the first motor, and the first motor is a brake motor and used for preventing the reverse rotation of the bevel gear driving transmission shafts of a plurality of groups from occurring under the self gravity of a plurality of groups of stretching arms.

Further, the unfolding device comprises a top plate fixedly installed at the top end of the transmission bin coaxially, a plurality of groups of supporting legs are evenly arranged on the outer wall of the circumference of the top plate, and a through groove for clamping the unfolding arm is reserved between every two adjacent groups of supporting legs.

Further, be provided with a plurality of groups limiting plate between the outer wall of inner tube and the inner wall of containing cylinder, and the limiting plate uses in pairs, and every is located the both sides of accomodating the groove respectively to the limiting plate for it is spacing to accomodating to the inside solar panel of containing cylinder.

Furthermore, a first flange plate is fixedly arranged at the joint of the storage barrel and the adjusting base, the adjusting base comprises a bottom box, a support column and a second flange plate, the support column is vertically and fixedly arranged in the middle of the bottom box, a hinge ball is arranged at the top of the support column, a connecting seat is arranged at the circle center of the bottom end of the second flange plate, a ball groove is milled on the connecting seat, and the hinge ball is rotatably arranged in the ball groove;

the second flange plate is connected with the first flange plate through a bolt and nut pair, an adjusting device is arranged inside the bottom box, and the adjusting device is used for adjusting the relative angle between the second flange plate and the bottom box.

Furthermore, the adjusting device comprises a plurality of groups of reversing rods and a turntable, wherein the plurality of groups of reversing rods and the turntable can be movably arranged on the bottom box along the axis direction of the adjusting device, and the plurality of groups of reversing rods are uniformly distributed between the bottom box and the second flange plate in a circumferential array by taking the axis of the support column as the center of a circle;

the turntable is coaxially and rotatably sleeved on the support column, the turntable is positioned in the bottom box, the turntable is coaxially and fixedly provided with a guide ring, the top end of the guide ring and the top end of the turntable form a certain included angle, one end of each group of reversing rods extending into the bottom box is contacted with the top end of the guide ring, the top end of each group of reversing rods is provided with a dome, and the domes are contacted with the bottom end of the bottom box;

and a power device is arranged in the bottom box and used for driving the rotating disc to rotate along the axis of the rotating disc.

Further, power device includes that fixed mounting establishes the driven gear on the support column with rotating the cover at the inside second motor of under casing, driven gear and carousel fixed connection, be provided with the driving gear on the output of under casing, the driving gear and driven gear meshing.

Compared with the prior art, the invention has the beneficial effects that: when solar energy is required to be absorbed, the driving device in the transmission bin controls the plurality of groups of the unfolding arms to synchronously rotate until the plurality of groups of the unfolding arms are all positioned in the same plane, at the moment, under the supporting action of the unfolding device, two groups of solar panels on each group of the unfolding arms are unfolded, so that the plurality of groups of the solar panels are all positioned in the same plane, and at the moment, the solar panels are unfolded to form a circle; when running into bad weather or need not to carry out solar energy absorption, start drive arrangement, make drive arrangement control a plurality of groups exhibition arm rotate in step, accomodate to the storage cylinder inside by a plurality of groups storage groove respectively until a plurality of groups exhibition arm, at the exhibition arm rotation in-process, because solar panel and expansion device separation, under the spring action of spring hinge, make two sets of solar panels on every group exhibition arm fold to the centre, so that folding two sets of solar panels can be followed the exhibition arm and accomodate to the storage cylinder inside by accomodating the groove after folding, adjust the base through setting up, can carry out the position according to a plurality of groups solar panel after the position of sun is to the storage cylinder and is expanded, be convenient for accomodate folding solar panel, reduce the condition emergence of bad weather to solar panel damage, promote solar panel's life.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an axial schematic view of the present invention;

FIG. 3 is an enlarged view of the connection of the receiver to the inner tube;

FIG. 4 is an exploded view of the components of the structure of the receiver and the inner tube;

FIG. 5 is an enlarged schematic view of the structure of the receiver;

FIG. 6 is an enlarged view of the connection between the arm and the solar panel;

FIG. 7 is an enlarged schematic view of a structural connection of the drive shaft to the inner tube or the like;

FIG. 8 is an enlarged view of the structure of the adjustment base;

FIG. 9 is an enlarged view of the structure of the adjustment base without the bottom case installed;

FIG. 10 is a structural cross-sectional view of a guide ring;

in the drawings, the reference numbers: 1. adjusting the base; 2. a storage cylinder; 3. a transmission bin; 4. mounting grooves; 5. a receiving groove; 6. stretching the arm; 7. a solar panel; 8. a spring hinge; 9. a deployment device; 10. a helical gear; 11. a connecting shaft; 12. a drive shaft; 13. an inner tube; 14. a first motor; 15. a top plate; 16. a brace; 17. a through groove; 18. a limiting plate; 19. a first flange plate; 20. a bottom box; 21. a support pillar; 22. a second flange plate; 23. a connecting seat; 24. a reversing lever; 25. a dome; 26. a turntable; 27. a guide ring; 28. a driven gear; 29. a second motor; 30. a drive gear.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. This embodiment is written in a progressive manner.

As shown in fig. 1 to 6, a solar folding plate for new energy mining according to the present invention includes:

the adjustable storage box comprises an adjusting base 1 and a storage barrel 2, wherein the storage barrel 2 is installed on the adjusting base 1, the adjusting base 1 is used for adjusting the orientation of the storage barrel 2, a transmission bin 3 is arranged on the storage barrel 2 in a communication mode, a plurality of groups of installation grooves 4 are uniformly arranged on the outer wall of the transmission bin 3 in a penetrating mode, a plurality of groups of accommodating grooves 5 are arranged on the outer wall of the storage barrel 2 corresponding to the plurality of groups of installation grooves 4 in a penetrating mode, and the plurality of groups of installation grooves 4 are communicated with the plurality of groups of accommodating grooves 5;

the solar folding device comprises a plurality of groups of unfolding arms 6 and a solar panel 7, wherein the plurality of groups of unfolding arms 6 are respectively and rotatably installed in a plurality of groups of installation grooves 4, and at least two groups of spring hinges 8 are arranged on two sides of each group of unfolding arms 6; the two groups of solar panels 7 are respectively and symmetrically arranged on two sides of the exhibition arm 6 through a plurality of groups of spring hinges 8, and the spring hinges 8 are used for enabling the two groups of solar panels 7 to be in a folded state under the condition of no external force;

the unfolding device 9 is fixedly arranged at the top end of the transmission bin 3, and is used for supporting the two groups of solar panels 7 in the folded state on each group of the unfolding arms 6 to be unfolded when the plurality of groups of the unfolding arms 6 synchronously rotate to the same plane;

a driving device is arranged in the transmission bin 3 and used for driving a plurality of groups of spreading arms 6 to synchronously rotate along the connection part of the spreading arms and the transmission bin 3;

in the embodiment, when solar energy absorption is needed, the driving device in the transmission bin 3 controls the plurality of groups of the spreading arms 6 to synchronously rotate until the plurality of groups of the spreading arms 6 are all located in the same plane, at this time, under the supporting action of the unfolding device 9, two groups of solar panels 7 on each group of the spreading arms 6 are unfolded, so that the plurality of groups of the solar panels 7 are all located in the same plane, and at this time, the solar panels are unfolded to form a circle; when running into bad weather or need not to carry out solar energy absorption, start drive arrangement, make drive arrangement control a plurality of groups exhibition arm 6 rotate in step, it accomodates to storage cylinder 2 inside to accomodate groove 5 by a plurality of groups respectively until a plurality of groups exhibition arm 6, at exhibition arm 6 rotation in-process, because solar panel 7 and expansion device 9 separation, under spring hinge 8's spring action, make two sets of solar panel 7 on every group exhibition arm 6 fold to the centre, so that two sets of solar panel 7 after folding can be accomodate to storage cylinder 2 inside by accomodating groove 5 along exhibition arm 6, adjust base 1 through setting up, can carry out the position according to the sun position to storage cylinder 2 and a plurality of groups solar panel 7 after the expansion, be convenient for accomodate folding solar panel, reduce the condition emergence of bad weather to solar panel damage, promote solar panel's life.

As a preferable mode of the above-described configuration, as shown in fig. 5, the storage cylinder 2 is a tapered cylinder;

in this embodiment, through the above-mentioned setting, reduce the turned angle of exhibition arm 6, rotate less angle through exhibition arm 6 and can accomodate solar panel 7 to storage cylinder 2 inside completely, because the toper section of thick bamboo focus leans on down, make the whole more stable of equipment simultaneously.

Preferably, as shown in fig. 6 to 7, a bevel gear 10 is disposed at a connection position of the spreading arm 6 and the transmission bin 3, a connection shaft 11 is coaxially and fixedly disposed at two sides of the bevel gear 10, and the bevel gear 10 is rotatably mounted in the mounting groove 4 by means of the connection shaft 11;

the driving device comprises a transmission shaft 12 which is coaxially and rotatably arranged in the transmission bin 3 and an inner pipe 13 which is fixedly arranged in the storage barrel 2, the transmission shaft 12 is meshed with the plurality of groups of bevel gears 10, a first motor 14 is fixedly arranged in the inner pipe 13, the first motor 14 is used for driving the transmission shaft 12 to rotate along the axis of the first motor, and the first motor 14 is a brake motor and is used for preventing the plurality of groups of bevel gears 10 from driving the transmission shaft 12 to rotate reversely under the self gravity of the plurality of groups of spreading arms 6;

in this embodiment, through starting first motor 14, make first motor 14 drive transmission shaft 12 rotatory, at the rotatory in-process of transmission shaft 12, drive a plurality of helical gear 10 synchronous revolution to a plurality of groups of exhibition arm 6 turned angle of synchro control, through setting up inner tube 13, inside the entering storage cylinder 2 such as the reduction external rainwater dust, lead to the impaired condition of power equipment to take place.

Preferably, as shown in fig. 4, the unfolding device 9 includes a top plate 15 coaxially and fixedly mounted at the top end of the transmission bin 3, a plurality of groups of supporting legs 16 are uniformly arranged on the circumferential outer wall of the top plate 15, and a through groove 17 for clamping the unfolding arm 6 is reserved between two adjacent groups of the supporting legs 16;

in this embodiment, through the setting, at exhibition arm 6 rotation in-process, through setting up spike 16, make spike 16 strut two sets of solar panel 7 that are close to mutually on two sets of adjacent exhibition arms 6, simple structure, be convenient for control opening and shutting of solar panel 7.

As shown in fig. 7, preferably, a plurality of sets of limiting plates 18 are arranged between the outer wall of the inner tube 13 and the inner wall of the storage barrel 2, and the limiting plates 18 are used in pairs, and each pair of limiting plates 18 is respectively located at two sides of the storage groove 5 and is used for limiting the solar panel 7 stored in the storage barrel 2;

in the embodiment, the limiting plates 18 are arranged on the two sides of the accommodating groove 5, so that the situation that the solar panel 7 is unfolded inside the accommodating barrel 2 and cannot stretch out subsequently due to the damage of the spring hinge 8 when the solar panel 7 is completely accommodated inside the accommodating barrel 2 is reduced.

As a preferred technical solution, as shown in fig. 8 to 9, a first flange 19 is fixedly arranged at a connection position of the storage cylinder 2 and the adjusting base 1, the adjusting base 1 includes a bottom case 20, a supporting column 21 and a second flange 22, the supporting column 21 is vertically and fixedly installed in the middle of the bottom case 20, a hinge ball is arranged at the top of the supporting column 21, a connecting seat 23 is arranged at the center of a circle at the bottom end of the second flange 22, a ball groove is milled on the connecting seat 23, and the hinge ball is rotatably installed inside the ball groove;

the second flange plate 22 is connected with the first flange plate 19 through a bolt and nut pair, and an adjusting device is arranged inside the bottom case 20 and used for adjusting the relative angle between the second flange plate 22 and the bottom case 20.

As a preferred technical solution, as shown in fig. 9 to 10, the adjusting device includes a plurality of sets of reversing rods 24 and a rotating disc 26 movably mounted on the bottom box 20 along the axis direction thereof, wherein the plurality of sets of reversing rods 24 are uniformly distributed between the bottom box 20 and the second flange 22 in a circumferential array with the axis of the supporting column 21 as the center of a circle;

the turntable 26 is coaxially and rotatably sleeved on the support column 21, the turntable 26 is located inside the bottom box 20, a guide ring 27 is coaxially and fixedly arranged on the turntable 26, a certain included angle is formed between the top end of the guide ring 27 and the top end of the turntable 26, one end of each of the plurality of groups of reversing rods 24 extending into the bottom box 20 is in contact with the top end of the guide ring 27, a dome 25 is arranged at the top end of each group of reversing rods 24, and the dome 25 is in contact with the bottom end of the bottom box 20;

a power device is arranged in the bottom box 20 and used for driving the turntable 26 to rotate along the axis of the turntable;

in this embodiment, the top ends of the plurality of sets of direction bars 24 are inclined with the rotation of the top end of the guide ring 27 by controlling the rotation of the rotary plate 26, so that the plurality of sets of direction bars 24 support the second flange 22 to be inclined, thereby facilitating the angle adjustment of the connection structure such as the storage barrel 2.

Preferably, as shown in fig. 9, the power device includes a second motor 29 fixedly installed inside the bottom case 20 and a driven gear 28 rotatably sleeved on the supporting column 21, the driven gear 28 is fixedly connected with the turntable 26, a driving gear 30 is arranged on an output end of the bottom case 20, and the driving gear 30 is engaged with the driven gear 28.

The solar folding plate for new energy exploitation is common in installation mode, connection mode or arrangement mode, and can be implemented as long as beneficial effects of the solar folding plate are achieved.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a new forms of energy exploit solar energy folded sheet which characterized in that includes:

the adjustable storage box comprises an adjusting base (1) and a storage barrel (2), wherein the storage barrel (2) is installed on the adjusting base (1), the adjusting base (1) is used for adjusting the orientation of the storage barrel (2), the storage barrel (2) is communicated with a transmission bin (3), a plurality of groups of installation grooves (4) are uniformly arranged on the outer wall of the transmission bin (3) in a penetrating manner, a plurality of groups of accommodating grooves (5) are arranged on the outer wall of the storage barrel (2) in a penetrating manner corresponding to the plurality of groups of installation grooves (4), and the plurality of groups of installation grooves (4) are communicated with the plurality of groups of accommodating grooves (5);

the solar folding device comprises a plurality of groups of unfolding arms (6) and a solar panel (7), wherein the plurality of groups of unfolding arms (6) are respectively rotatably installed in a plurality of groups of installation grooves (4), and at least two groups of spring hinges (8) are arranged on two sides of each group of unfolding arms (6); the two groups of solar panels (7) are respectively and symmetrically arranged on two sides of the display arm (6) through a plurality of groups of spring hinges (8), and the spring hinges (8) are used for enabling the two groups of solar panels (7) to be in a folded state under the condition of no external force;

the unfolding device (9) is fixedly arranged at the top end of the transmission bin (3) and used for supporting the two groups of solar panels (7) in the folded state on each group of unfolding arms (6) to be unfolded when the groups of unfolding arms (6) synchronously rotate to the same plane;

the driving device is arranged inside the transmission bin (3) and used for driving the plurality of groups of the spreading arms (6) to synchronously rotate along the joint of the transmission bin (3) and the groups of the spreading arms.

2. The solar energy folding plate for new energy exploitation according to claim 1, characterized in that the receiving cylinder (2) is a cone-shaped cylinder.

3. The solar energy folding plate for new energy exploitation according to claim 1, wherein a bevel gear (10) is arranged at a connection position of the spreading arm (6) and the transmission bin (3), connecting shafts (11) are coaxially and fixedly arranged on two sides of the bevel gear (10), and the bevel gear (10) is rotatably installed in the installation groove (4) by virtue of the connecting shafts (11);

drive arrangement includes that the coaxial line rotates and installs transmission shaft (12) and inner tube (13) at storage cylinder (2) inside at inside transmission storehouse (3), transmission shaft (12) and a plurality of groups helical gear (10) all mesh connection, the inside fixed mounting of inner tube (13) has first motor (14), first motor (14) are used for driving transmission shaft (12) and rotate along self axis, first motor (14) are brake motor for prevent under the self gravity of a plurality of groups exhibition arm (6), make the condition of a plurality of groups helical gear (10) drive transmission shaft (12) reversal take place.

4. The solar energy folding plate for new energy exploitation according to claim 1, wherein the unfolding device (9) includes a top plate (15) fixedly mounted on the top end of the transmission bin (3) coaxially, a plurality of groups of supporting legs (16) are uniformly arranged on the circumferential outer wall of the top plate (15), and a through groove (17) for clamping the unfolding arm (6) is reserved between two adjacent groups of the supporting legs (16).

5. The solar folding plate for new energy exploitation according to claim 3, wherein a plurality of sets of limiting plates (18) are arranged between the outer wall of the inner pipe (13) and the inner wall of the storage barrel (2), and the limiting plates (18) are used in pairs, and each pair of limiting plates (18) are respectively located at two sides of the storage groove (5) and used for limiting the solar panel (7) stored in the storage barrel (2).

6. The solar folding plate for new energy exploitation according to claim 1, wherein a first flange (19) is fixedly arranged at a joint of the storage barrel (2) and the adjusting base (1), the adjusting base (1) comprises a bottom box (20), a supporting column (21) and a second flange (22), the supporting column (21) is vertically and fixedly installed in the middle of the bottom box (20), a hinge ball is arranged at the top of the supporting column (21), a connecting seat (23) is arranged at a circle center of the bottom end of the second flange (22), a ball groove is milled on the connecting seat (23), and the hinge ball is rotatably installed inside the ball groove;

the second flange plate (22) is connected with the first flange plate (19) through a bolt and nut pair, an adjusting device is arranged inside the bottom box (20), and the adjusting device is used for adjusting the relative angle between the second flange plate (22) and the bottom box (20).

7. The solar energy folding plate for new energy exploitation according to claim 6, wherein the adjusting device comprises a plurality of groups of reversing rods (24) and a rotating disc (26) which are movably mounted on the bottom box (20) along the axis direction of the adjusting device, and the plurality of groups of reversing rods (24) are uniformly distributed between the bottom box (20) and the second flange (22) in a circumferential array with the axis of the supporting column (21) as the center of a circle;

the rotating disc (26) is coaxially and rotatably sleeved on the supporting column (21), the rotating disc (26) is located inside the bottom box (20), a guide ring (27) is coaxially and fixedly arranged on the rotating disc (26), a certain included angle is formed between the top end of the guide ring (27) and the top end of the rotating disc (26), one ends of a plurality of groups of reversing rods (24) extending into the bottom box (20) are all in contact with the top end of the guide ring (27), the top end of each group of reversing rods (24) is provided with a dome (25), and the domes (25) are in contact with the bottom end of the bottom box (20);

and a power device is arranged in the bottom box (20) and is used for driving the rotary disc (26) to rotate along the axis of the rotary disc.

8. The solar energy folding plate for new energy exploitation according to claim 7, wherein the power device includes a second motor (29) fixedly installed inside the bottom case (20) and a driven gear (28) rotatably sleeved on the supporting column (21), the driven gear (28) is fixedly connected with the turntable (26), a driving gear (30) is disposed on an output end of the bottom case (20), and the driving gear (30) is engaged with the driven gear (28).