CN215981748U

CN215981748U - Rotary wing type LED advertising board device

Info

Publication number: CN215981748U
Application number: CN202121894138.2U
Authority: CN
Inventors: 周安斌; 尚绪峰; 马云蛟
Original assignee: Shandong Jindong Digital Creative Co ltd
Current assignee: Shandong Jindong Digital Creative Co ltd
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2022-03-08
Anticipated expiration: 2031-08-13

Abstract

The utility model provides a rotary wing type LED billboard device, belonging to the technical field of LED billboards. This rotary wing formula LED billboard device, the on-line screen storage device comprises a base, LED bill-board and crown, the LED bill-board sets up in the top of base, the crown sets up in the top of LED bill-board, a pedestal, pass through bolt fixed connection between LED bill-board and the crown, through the huge LED bill-board of the rotatable triangular prism of three-layer, in the broadcast advertisement, can realize the rotation of multiform, attract pedestrian or visitor's eyeball, LED screen composite form is abundant, but multilayer bill-board synchronous revolution or multi-angle dislocation are rotatory, reinforcing advertisement memory, show the enterprise image, promote brand awareness, all there is the promotion to advertisement mode and effect, moreover, compact structure, take up an area of less, the installation is swift convenient, extensive market and great business machine have.

Description

Rotary wing type LED advertising board device

Technical Field

The utility model relates to the technical field of LED advertising boards, in particular to a rotary wing type LED advertising board device.

Background

The only method for commodity marketing is advertising, and the popularity of commodities is improved. The advertising mode is various, and the most common mode is outdoor advertising, such as advertisement of a huge advertisement beside a high-speed road, a shopping mall, a station, a street with dense people flow, an advertisement of a tourist attraction and the like. Under the condition that the overall growth range of the advertising industry is slightly slowed down, the growth speeds of outdoor advertisements and new media advertisements are developed rapidly, and the outdoor advertisements and the new media advertisements become a fuzz of the advertising industry. In the rapid development period of urban construction, the LED advertisements are commented with the urban construction and developed more than shoulders, and in addition, the advertiser has intensive cultivation and fine culture on advertisement putting, and the budget is tightened, so that the LED media with relatively low putting cost is favored by the advertiser, and the LED advertisements have the functions of outdoor advertisements and new media advertisements, and can play a strong economic pulling role in the field of outdoor advertisements. The LED has the characteristics of high efficiency, energy conservation, high light quality, no radiation, reliability, durability and extremely low maintenance cost, and belongs to a typical green lighting source.

At present, most of common LED advertising boards are of flat plate structures, the combination is single, people are in aesthetic fatigue after a long time, the attention and impression are not deep enough, and the advertising effect is greatly discounted.

SUMMERY OF THE UTILITY MODEL

In order to make up for the defects, the utility model provides the rotary wing type LED billboard device, through the three-layer rotatable triangular prism giant LED billboard, when the advertisement is played, the rotation in multiple forms can be realized, the eyeballs of pedestrians or tourists are attracted, the advertisement mode and the advertisement effect are improved, the structure is compact, the occupied area is saved, and the economic benefit is good.

The utility model is realized by the following steps:

rotatory wing formula LED bill-board device, including base, LED bill-board and crown, the LED bill-board set up in the top of base, the crown set up in the top of LED bill-board, base, LED bill-board with pass through bolt fixed connection between the crown.

The LED advertising board is provided with three groups, and aligns about all and arranges, the LED advertising board includes the structure frame, the structure frame is equilateral triangular prism structure, the center of structure frame is provided with the fixed axle, one side of structure frame is provided with fixed LED screen, the other both sides of structure frame all are provided with upset LED screen, fixed LED screen with be provided with rotatory hinge between the upset LED screen, the inside of structure frame is provided with upset screen actuating mechanism and rotary driving mechanism.

The crown comprises a support and a decorative plate, and the decorative plate is fixedly connected to the outer side of the support.

In one embodiment of the utility model, a maintenance ladder is arranged inside the bottom frame, and an access door is arranged on the outer packaging plate.

In one embodiment of the utility model, the upper end and the lower end of the fixed shaft are respectively provided with a connecting flange, and the three groups of LED advertising boards are connected through the connecting flanges through bolts.

In one embodiment of the utility model, two sets of turnover screen driving mechanisms are arranged inside each set of LED advertising boards, each set of turnover screen driving mechanism acts on one set of turnover LED screens respectively, each turnover screen driving mechanism comprises a servo electric cylinder, one side of the servo electric cylinder is provided with an electric cylinder fixing seat, the output end of the servo electric cylinder is connected with a fisheye joint, and the fisheye joint is connected with a hinge seat.

In an embodiment of the utility model, an adjusting plate is arranged at the bottom of the electric cylinder fixing seat, the adjusting plate is connected with the electric cylinder fixing seat through a bolt, the adjusting plate is welded and fixed with the structural frame, four groups of limiting columns are symmetrically distributed on two sides of the adjusting plate, through holes are formed in the limiting columns, adjusting bolts are arranged in the limiting columns, and one ends of the adjusting bolts are abutted to the electric cylinder fixing seat after penetrating through the limiting columns.

In an embodiment of the present invention, a connecting shaft is disposed at one side of the hinge base, the connecting shaft is inserted into the fisheye joint, and the connecting shaft is in clearance fit with the fisheye joint.

In one embodiment of the utility model, a stress rod is arranged on the rear side of the turnover LED screen, a connecting plate is fixedly connected to one side of the stress rod, and the connecting plate is connected with the hinge seat through a bolt.

In one embodiment of the present invention, the rotary driving mechanism includes a servo deceleration motor and a fixed gear, the output end of the servo deceleration motor is fixedly connected with a rotary gear, the fixed gear is fixedly connected to the outer surface of the fixed shaft, and the rotary gear is in fit connection with the fixed gear.

In an embodiment of the present invention, conductive rings are disposed outside the fixed shaft, and three groups of conductive rings are disposed on the conductive rings, and the conductive rings are electrically connected to the fixed LED screen, the flipping LED screen, the servo electric cylinder, and the servo deceleration motor.

The rotary wing type LED billboard device obtained by the design has the beneficial effects that:

(1) through the triangular prism structural design of the LED billboard, the display range of the billboard is larger, the structure is novel and scientific, the eyeballs of pedestrians and tourists are attracted more easily, and the advertising income area is wider;

(2) the LED screens are rich in combination form, the multilayer advertising boards can rotate synchronously or in a multi-angle staggered manner, the advertising memory is enhanced, the enterprise image is revealed, and the brand popularity is improved;

(3) simple structure, small occupation of land, quick and convenient installation, wide market and great business opportunity.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a rotary wing type LED billboard device according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a chassis according to an embodiment of the present invention;

FIG. 3 is a schematic top view of an LED billboard according to an embodiment of the present invention;

FIG. 4 is a cross-sectional structural view of an LED billboard provided in an embodiment of the utility model;

FIG. 5 is an enlarged view taken at A in FIG. 4;

FIG. 6 is an enlarged view at B of FIG. 4;

fig. 7 is a structural view of a rotation driving apparatus according to an embodiment of the present invention;

FIG. 8 is a cross-sectional structural view of a crown provided in an embodiment of the present invention;

in the figure: 100-a base; 101-steel reinforced concrete foundation; 102-a chassis; 1021-maintenance ladder; 1022-an overwrap keel; 1023-an outer packing plate; 1024-access door; 103-a fixed plate; 200-LED billboards; 201-structural frame; 2011-fixed axis; 2012-connecting flange; 202-fixed LED screen; 2021-a rotating hinge; 203-turning over the LED screen; 2031-force-bearing rod; 2032-connecting plate; 204-a flip screen drive mechanism; 2041-servo electric cylinder; 2042-electric cylinder fixing seat; 2043-fisheye joint; 2044-hinge mount; 2045-adjusting plate, 2046-limiting column; 2047-adjusting bolt; 2048-a connecting shaft; 205-a rotary drive mechanism; 2051-servo gear motor; 2052-rotating gear; 2053-fixed gear; 206-conductive ring; 300-a crown; 301-a scaffold; 302-decorative board.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating 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 the present invention, "a plurality" means two or more unless specifically defined otherwise.

Examples

Referring to fig. 1-8, the present invention provides a technical solution: the rotary wing type LED billboard device comprises a base 100, an LED billboard 200 and a cap top 300, wherein the LED billboard 200 is arranged above the base 100, the cap top 300 is arranged above the LED billboard 200, and the base 100, the LED billboard 200 and the cap top 300 are fixedly connected through bolts.

Referring to fig. 1-2, a base 100 includes a steel-concrete foundation 101 and a column 102, a chassis 102 is disposed above the steel-concrete foundation 101, a fixing plate 103 is welded to the bottom of the chassis 102, the fixing plate 103 is fixedly connected to the steel-concrete foundation 101 through bolts, the chassis 102 is of a profile structure, an outer package keel 1022 is fixedly connected to the outer side of the chassis 102, an outer package plate 1023 is disposed on the outer side of the outer package keel 1022, the base 100 is used for supporting an LED billboard 200, the LED billboard is more stable through pouring the steel-concrete foundation 101, and the rotary wing billboard can normally operate in a rotating environment and an outdoor harsh environment such as rain, snow and wind without overturning accidents, the chassis 102 is connected to the steel-concrete foundation 101 through bolts, which improves the height of the rotary wing LED billboard, provides a wider viewing angle for tourists, and the outer package plate 1023 also increases the ornamental value of the base 100.

Referring to fig. 1 and 3-7, three groups of LED billboards 200 are arranged, and are all arranged in an up-down alignment manner, each LED billboard 200 includes a structural frame 201, the structural frame 201 is an equilateral triangular prism structure, a fixed shaft 2011 is arranged at the center of the structural frame 201, a fixed LED screen 202 is arranged at one side of the structural frame 201, flip LED screens 203 are arranged at the other two sides of the structural frame 201, a rotating hinge 2021 is arranged between the fixed LED screen 202 and the flip LED screens 203, a flip screen driving mechanism 204 and a rotating driving mechanism 205 are arranged inside the structural frame 201, the fixed shaft 2011 plays a role in fixing and mutual connection, one fixed LED screen 202 and two flip LED screens 203 are connected through the high-strength rotating hinge 2021, a servo electric cylinder 2041 on the flip screen driving mechanism 204 pushes out a hinge base 2044, under the action of the flip screen driving mechanism 204, the flip LED screens can rotate 120 degrees around the rotating hinge 2021 to the maximum degree, the opening and closing effect is achieved, the servo speed reducing motor 2051 operates to enable the rotary gear 2052 and the fixed gear 2053 to rotate in a meshed mode, and under the action of the rotary driving mechanism 205, synchronous rotation or staggered rotation of the three layers of LED advertising boards can be achieved.

Referring to fig. 1 and 8, the cap top 300 includes a bracket 301 and a decorative plate 302, the decorative plate 302 is fixedly connected to the outer side of the bracket 301, and the cap top 300 is used for protecting the inside of the LED billboard 200 from the sun and rain and has the function of enhancing the aesthetic property.

As an embodiment of the present invention, further, a maintenance ladder 1021 is disposed inside the chassis 102, an access door 1024 is disposed on the outer package plate 1023, and the access door 1024 and the maintenance ladder 1021 facilitate maintenance and replacement of devices inside the LED billboard.

As an embodiment of the utility model, further, the upper end and the lower end of the fixed shaft 2011 are both provided with the connecting flanges 2012, and the three groups of LED billboards 200 are connected by bolts through the connecting flanges 2012, so that the installation is fast and convenient, and the hoisting time is saved.

As an embodiment of the present invention, further, two sets of flip screen driving mechanisms 204 are disposed inside each set of LED billboard 200, each set of flip screen driving mechanisms 204 respectively acts on one set of flip LED screens 203, each flip screen driving mechanism 204 includes a servo electric cylinder 2041, one side of the servo electric cylinder 2041 is provided with an electric cylinder fixing seat 2042, an output end of the servo electric cylinder 2041 is connected with a fisheye joint 2043, the fisheye joint 2043 is connected with a hinge seat 2044, an inner ring of the fisheye joint 2043 is provided with a composite material, self-lubrication is generated during operation, tilting motion can be performed within a certain angle, and transmission between the fisheye joint 2043 and the hinge seat 2044 satisfies rotation of the flip LED screens 203 during opening and closing processes.

As an embodiment of the present invention, further, an adjusting plate 2045 is disposed at the bottom of the electric cylinder fixing seat 2042, the adjusting plate 2045 is connected to the electric cylinder fixing seat 2042 by a bolt, the adjusting plate 2045 is welded and fixed to the structural frame 201, four sets of limiting columns 2046 are symmetrically distributed on two sides of the adjusting plate 2045, through holes are formed in the limiting columns 2046, adjusting bolts 2047 are disposed in the limiting columns 2046, one end of each adjusting bolt 2047 passes through the corresponding limiting column 2046 and abuts against the electric cylinder fixing seat 2042, and the telescopic angle of the servo electric cylinder 2041 can be finely adjusted by finely adjusting the position of the four-corner adjusting bolt 2047, so that the joints between the flipped LED screen 203 and the fixed LED screen 202 are kept consistent after the LED screen is flipped and unfolded.

As an embodiment of the present invention, further, a connecting shaft 2048 is disposed on one side of the hinge base 2044, the connecting shaft 2048 is inserted into the fisheye joint 2043, and the connecting shaft 2048 is in clearance fit with the fisheye joint 2043.

As an embodiment of the utility model, further, a stress rod 2031 is arranged on the rear side of the flip LED screen 203, a connecting plate 2032 is fixedly connected to one side of the stress rod 2031, the connecting plate 2032 is connected to the hinge base 2044 through a bolt, and the push-pull force of the servo electric cylinder 2041 is transmitted to the flip LED screen 202 through the connecting shaft 2048, the hinge base 2044, and the stress rod 2031 in sequence.

As an embodiment of the present invention, further, the rotation driving mechanism 205 includes a servo deceleration motor 2051 and a fixed gear 2053, an output end of the servo deceleration motor 2051 is fixedly connected with a rotation gear 2052, the fixed gear 2053 is fixedly connected to an outer surface of the fixed shaft 2011, the rotation gear 2052 is connected with the fixed gear 2053 in a matching manner, and the rotation gear 2052 and the fixed gear 2053 are in meshing transmission, so that the three-layer LED signboard 200 can rotate synchronously or in a staggered manner.

As an embodiment of the present invention, further, conducting rings 206 are arranged outside the fixed shaft 2011, three groups of conducting rings 206 are arranged, the conducting rings 206 are electrically connected to the fixed LED screen 202, the flipping LED screen 203, the servo electric cylinder 2041 and the servo deceleration motor 2051, the conducting rings 206 respectively supply power to the fixed LED screen 202, the flipping LED screen 203, the servo electric cylinder 2041 and the servo deceleration motor 2051, the PLC controller controls actions of the servo electric cylinder 2041 and the servo deceleration motor 2051, and the radio signal transmits a video signal to the LED screen.

Specifically, the working principle of the rotary wing type LED billboard device is as follows: the method comprises the steps of positioning and pouring the reinforced concrete foundation 101 according to the size of the LED advertising board 200, hoisting and placing a frame 102 on the reinforced concrete foundation 101, fixedly connecting the bottom frame 102 and the reinforced concrete foundation 101 through bolts, improving the height of the LED advertising board 200, attracting the eyeballs of pedestrians and visitors more easily, enabling the advertising income range to be wider, welding an outer packaging keel 1022 on the outer side of the bottom frame 102, paving an outer packaging plate 1023 on the outer side of the outer packaging keel 1022, enhancing the ornamental value of the advertising board, installing a fixed LED screen 202 on a structure frame 201, hinging the fixed LED screen 202 and an overturning LED screen 203 through a rotary hinge 2021, hoisting and placing three groups of LED advertising boards 200 on the bottom frame 102 respectively after adjusting the positions of a fixed overturning driving mechanism 204 and a rotary driving mechanism 205, fixedly connecting through bolts, hoisting and fixedly connecting a cap top 300 provided with a decorative board 302 above the LED advertising board 200, and providing sun-screening and rain-proof measures for devices inside the LED advertising boards 200, after the installation is finished, a 220V cable penetrates into the central fixed shaft 2022 and is electrically connected with the three groups of conducting rings 206, the conducting rings 206 respectively supply power to the fixed LED screen 202, the turnover LED screen 203, the servo electric cylinder 2041 and the servo speed reducing motor 2051, the PLC controller is used for controlling the actions of the servo electric cylinder 2041 and the servo speed reducing motor 2051, the servo electric cylinder 2041 is used for controlling the unfolding and the combination of the turnover LED screen 203, the servo speed reducing motor 2051 is used for controlling the rotation of the three groups of LED advertising boards 200, then a radio signal is connected to transmit an advertising video playing signal to the LED screen, the LED advertising boards 200 enter an initial working state after being electrified, the middle three groups of triangular prism LED screens are level with the base 100 and the top cap 300, when the three groups of LED advertising boards are required to rotate, the rotary driving mechanism 205 is driven by a program of the PLC controller, the servo speed reducing motor 2051 drives the rotary gear 2052 to move around the fixed gear 2053, and when the rotary gear 2052 rotates, drive LED bill-board 200 and wholly rotate, through adjusting PLC control program, can make three-layer LED bill-board 200 with the angular rotation or dislocation rotation, when needing LED bill-board 200 to exhibition screen, upset screen actuating mechanism 204 is under the program drive of PLC controller, servo electronic jar 2041 releases fisheye joint 2043, drive hinge mount 2044 through connecting axle 2048 and promote upset LED screen 203, upset LED screen 203 expands around rotatory hinge 2021, form the coplanar with fixed LED screen 202, realize LED bill-board 200 exhibition screen function, through the setting of PLC program, but LED bill-board 200 automatic cycle exhibition screen and multi-angle or dislocation rotation work.

It should be noted that the specific model specifications of the servo electric cylinder 2041, the servo speed-reducing motor 2051, and the conducting ring 206 need to be determined according to the actual specification of the device, and the specific model selection calculation method adopts the prior art, so detailed description is omitted.

It should be noted that the power supply and the principle of the servo electric cylinder 2041, the servo speed reducer 2051 and the conductive ring 206 are clear to those skilled in the art, and will not be described in detail herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The rotary wing type LED billboard device is characterized by comprising a base (100), an LED billboard (200) and a cap top (300), wherein the LED billboard (200) is arranged above the base (100), the cap top (300) is arranged above the LED billboard (200), and the base (100), the LED billboard (200) and the cap top (300) are fixedly connected through bolts;

the base (100), the base (100) comprises a steel-concrete foundation (101) and a vertical column (102), the base frame (102) is arranged above the steel-concrete foundation (101), a fixing plate (103) is welded at the bottom of the base frame (102), the fixing plate (103) is fixedly connected with the steel-concrete foundation (101) through bolts, the base frame (102) is of a profile structure, an outer package keel (1022) is fixedly connected to the outer side of the base frame (102), and an outer package plate (1023) is arranged on the outer side of the outer package keel (1022);

the LED advertising board comprises an LED advertising board (200), wherein three groups of LED advertising boards (200) are arranged and are aligned up and down, the LED advertising board (200) comprises a structure frame (201), the structure frame (201) is of an equilateral triangular prism structure, a fixed shaft (2011) is arranged at the center of the structure frame (201), a fixed LED screen (202) is arranged on one side of the structure frame (201), a turnover LED screen (203) is arranged on the other two sides of the structure frame (201), a rotary hinge (2021) is arranged between the fixed LED screen (202) and the turnover LED screen (203), and a turnover screen driving mechanism (204) and a rotary driving mechanism (205) are arranged inside the structure frame (201);

the hat top (300) comprises a support (301) and a decorative plate (302), and the decorative plate (302) is fixedly connected to the outer side of the support (301).

2. The rotary wing LED billboard device of claim 1, wherein a maintenance ladder (1021) is provided inside the chassis (102), and an access door (1024) is provided on the outer package plate (1023).

3. The rotary wing type LED billboard device according to claim 1, wherein the upper and lower ends of the fixed shaft (2011) are provided with connecting flanges (2012), and the three groups of LED billboards (200) are connected by bolts through the connecting flanges (2012).

4. The rotary wing type LED billboard device according to claim 1, wherein two sets of turnover screen driving mechanisms (204) are arranged inside each set of LED billboard (200), each set of turnover screen driving mechanisms (204) respectively acts on one set of turnover LED screen (203), each turnover screen driving mechanism (204) comprises a servo electric cylinder (2041), one side of the servo electric cylinder (2041) is provided with an electric cylinder fixing seat (2042), the output end of the servo electric cylinder (2041) is connected with a fisheye joint (2043), and the fisheye joint (2043) is connected with a hinge seat (2044).

5. The rotary wing type LED billboard device according to claim 4, wherein an adjusting plate (2045) is arranged at the bottom of the electric cylinder fixing seat (2042), the adjusting plate (2045) is connected with the electric cylinder fixing seat (2042) through bolts, the adjusting plate (2045) is fixed to the structure frame (201) in a welded manner, four sets of limiting columns (2046) are symmetrically distributed on two sides of the adjusting plate (2045), through holes are formed in the limiting columns (2046), adjusting bolts (2047) are arranged in the limiting columns (2046), and one ends of the adjusting bolts (2047) are abutted to the electric cylinder fixing seat (2042) after passing through the limiting columns (2046).

6. The rotary wing type LED billboard device of claim 4, wherein a connecting shaft (2048) is arranged on one side of the hinge base (2044), the connecting shaft (2048) is inserted into the fisheye joint (2043), and the connecting shaft (2048) is in clearance fit with the fisheye joint (2043).

7. The rotary wing type LED billboard device according to claim 1, wherein a stress rod (2031) is arranged at the rear side of the turnover LED screen (203), a connecting plate (2032) is fixedly connected to one side of the stress rod (2031), and the connecting plate (2032) is connected with the hinge base (2044) through bolts.

8. The rotary wing LED billboard device of claim 1, wherein the rotary drive mechanism (205) comprises a servo deceleration motor (2051) and a fixed gear (2053), wherein a rotary gear (2052) is fixedly connected to an output end of the servo deceleration motor (2051), the fixed gear (2053) is fixedly connected to an outer surface of the fixed shaft (2011), and the rotary gear (2052) is in fit connection with the fixed gear (2053).

9. The rotary wing LED billboard device of claim 1, wherein the rotary drive mechanism (205) comprises a servo deceleration motor (2051) and a fixed gear (2053), wherein a rotary gear (2052) is fixedly connected to an output end of the servo deceleration motor (2051), the fixed gear (2053) is fixedly connected to an outer surface of the fixed shaft (2011), and the rotary gear (2052) is in fit connection with the fixed gear (2053).