阅读说明：本技术 一种便于安装更换led电源的led灯广告牌 (LED lamp billboard convenient for installing and replacing LED power supply ) 是由 刘昭伟 于 2021-08-06 设计创作，主要内容包括：本发明公开了一种便于安装更换LED电源的LED灯广告牌,包括机壳,所述机壳的左右两侧前端面上设有开口向前的工作腔,所述工作腔内设有升降机构,所述机壳的前侧设有墙壁,所述工作腔的下内壁上设有与两个所述工作腔均相连的踏板腔,所述踏板腔内设有踩踏机构,所述墙壁内设有支撑机构,所述墙壁的下侧设有控制腔,所述控制腔内设有控制机构,本发明结构简单,操作便捷,本发明在使用时,当需要在下方进行LED电源维修或更换时,本发明能够将广告牌移下,并向前推出,以方便工作人员进行维修,且当遇到需要在上方进行维修的情况时,本发明能够自动将广告牌向前移出,并且搭建出一个平台供工作人员在上方进行更换维修工作。(The invention discloses an LED lamp billboard convenient for installing and replacing an LED power supply, which comprises a casing, wherein working cavities with forward openings are arranged on the front end surfaces of the left side and the right side of the casing, a lifting mechanism is arranged in the working cavities, a wall is arranged on the front side of the casing, a pedal cavity connected with the two working cavities is arranged on the lower inner wall of the working cavity, a treading mechanism is arranged in the pedal cavity, a supporting mechanism is arranged in the wall, a control cavity is arranged on the lower side of the wall, and a control mechanism is arranged in the control cavity. And a platform is built for workers to replace and maintain the platform.)

1. The utility model provides a LED lamp bill-board convenient to installation is changed LED power, includes the casing, its characterized in that: the front end faces of the left side and the right side of the casing are provided with working cavities with forward openings, the working cavities are internally provided with lifting mechanisms, the front side of the casing is provided with a wall, the lower inner wall of each working cavity is provided with pedal cavities connected with the two working cavities, the pedal cavities are internally provided with treading mechanisms, the wall is internally provided with a supporting mechanism, the lower side of the wall is provided with a control cavity, the control cavity is internally provided with a control mechanism, each lifting mechanism comprises two pairs of U-shaped cavities which are respectively positioned on the left inner wall and the right inner wall of the different working cavities and have opposite openings, the left rear end face and the right rear end face of the upper side of the wall are respectively fixedly provided with lifting plates extending into the different working cavities, a lifting square rod penetrating through the lifting plates is arranged between the lower rear ends of the same pair of U-shaped cavities in a friction connection manner, and the rear end faces of the two lifting plates are respectively provided with a hydraulic cavity with a backward opening, a hydraulic rod is arranged in the hydraulic cavity in a sliding manner, a lifting block is fixedly arranged at the rear end of the hydraulic rod, lifting racks are fixed at the upper end and the rear end of the lifting block, a transmission cavity with a rightward opening is arranged on the left inner wall of the upper side of the working cavity on the left side, a transmission motor is fixedly arranged on the left inner wall of the transmission cavity, an upper lifting shaft is connected between the right end surface of the transmission motor and the right inner wall of the working cavity on the right side, a centrifugal wheel positioned in the transmission cavity is arranged at the left end of the upper lifting shaft, a centrifugal cavity with an opening far away from the circle center is arranged in the centrifugal wheel, a centrifugal block is arranged in the centrifugal cavity in a sliding manner, a centrifugal spring is fixedly connected between the end surface of the centrifugal block close to the circle center and the inner wall of the centrifugal cavity close to the circle center, a button cavity with a downward opening is arranged on the upper inner wall of the transmission cavity, and a button is arranged in the button cavity in a sliding manner, the utility model discloses a portable electronic device, including button, fixed connection, limiting rope, upper end face, lower inner wall, the upper end face of button, the one end of limiting rope is connected on the lower terminal surface of connecting plate, and limiting rope follows enter into on the lower inner wall of button cavity within the casing, the up end of button with fixed connection is equipped with button spring between the last inner wall of button cavity, go up the epaxial fixed two of being equipped with respectively of lift and be located the difference the left last athey wheel of working cavity, go up the epaxial fixed two back athey wheels that are located the working cavity right side that are equipped with respectively of lift, all rotate between the inner wall about two working cavity front sides and be equipped with preceding lift axle, preceding epaxial all fixed athey wheel that is equipped with of preceding athey wheel, preceding athey wheel with connect through the track transmission between the back athey wheel, and the outside of track has the tooth.

2. The LED lamp advertising board convenient for installing and replacing the LED power supply as claimed in claim 1, wherein: a lower lifting shaft is rotatably arranged on the left inner wall of the lower side of the working cavity on the left side, a lower lifting shaft is also rotatably arranged between the left inner wall and the right inner wall of the lower side of the working cavity on the right side, a lower crawler wheel is fixedly connected to the lifting shaft, a crawler belt with teeth on the outer side is connected between the lower crawler wheel and the upper crawler wheel, a pushing cavity with a left opening is arranged on the right inner wall of the lower side of the working cavity on the left side, a pushing shaft is rotatably arranged on the right inner wall of the pushing cavity, a limiting wheel with a limiting groove is fixedly arranged at the left end of the pushing shaft, a connecting block is fixedly arranged at the left end of the pushing shaft, the connecting block extends into the right end face of the lower lifting shaft, the connecting block is in friction connection with the lower lifting shaft, a limiting cavity with an upward opening and positioned on the lower side of the limiting wheel is arranged on the lower inner wall of the pushing cavity, and a limiting block is slidably arranged in the limiting cavity, the lower terminal surface of stopper with fixed connection is equipped with spacing spring between the lower inner wall in spacing chamber, connect the other end that has spacing rope on the lower inner wall of stopper, spacing rope follows enter into on the lower inner wall in spacing chamber within the casing, it is equipped with the promotion axle to rotate on the back inner wall in chamber to release, the rear end of promotion axle is fixed and is equipped with the worm wheel, the turbine with release epaxial thread engagement, be equipped with on the right side rear inner wall of lifter and run through from top to bottom the screens chamber of lifter, the front end threaded connection who promotes the axle is equipped with releases the sleeve, just release the sleeve and stretch into the screens intracavity, it is equipped with the screens piece to release telescopic front end fixed.

3. The LED lamp advertising board convenient for installing and replacing the LED power supply as claimed in claim 1, wherein: trample the mechanism and establish including sliding the footboard of footboard intracavity, be equipped with horizontal kicking block on the lower inner wall in footboard chamber, just the preceding terminal surface of kicking block with mutual contact between the rear end face of footboard, the fixed catch bar that is equipped with on the lower inner wall of elevator, the catch bar with the rear end face contact of footboard, the rear inner wall in footboard chamber with fixed connection is equipped with the footboard spring between the rear end face of footboard.

4. The LED lamp advertising board convenient for installing and replacing the LED power supply as claimed in claim 1, wherein: the supporting mechanism comprises an escalator cavity positioned on the rear end face of the right side of the wall, a supporting cavity with a backward opening is arranged on the rear end face of the left side of the wall, a connecting rack extending into the supporting cavity is slidably arranged on the left inner wall of the escalator cavity, two fixed blocks are fixedly arranged on the rear end face of the right side of the connecting rack, the rear ends of the fixed blocks are fixedly connected with the escalator, two rotating cavities which are contacted with the rear end face of the wall are respectively arranged on the left inner wall and the right inner wall of the supporting cavity, two supporting shafts are rotatably arranged between the upper inner wall and the lower inner wall of the middle part of the supporting cavity, two connecting gears which are mutually meshed are fixedly arranged at the lower ends of the two supporting shafts, a pushing gear which is mutually meshed with the connecting rack is fixedly arranged at the upper end of the supporting shaft on the right side, and two supporting plates which respectively extend into different rotating cavities are fixedly arranged at the lower ends of the two supporting shafts, and the right side rotating cavity is connected with the staircase cavity.

5. The LED lamp advertising board convenient for installing and replacing the LED power supply as claimed in claim 4, wherein: be equipped with the fixed chamber that the opening is backward on the upside rear end face of wall, be equipped with on the terminal surface before the upside of casing with the chamber is prevented falling of fixed chamber parallel and level, fixed intracavity slides and is equipped with and stretches into prevent falling the piece of preventing of intracavity, the rear end face slope of preventing the piece is downward, prevent the preceding terminal surface of piece with be connected with between the preceding inner wall of fixed chamber and prevent falling the spring, be connected with the one end of preventing falling the rope on preventing the preceding terminal surface of piece, prevent falling the rope and follow enter into on the preceding inner wall of fixed chamber in the wall.

6. The LED lamp advertising board convenient for installing and replacing the LED power supply as claimed in claim 5, wherein: the control mechanism comprises a fixture block cavity with a backward opening on the front inner wall of the control cavity, a fixture block is arranged in the fixture block cavity in a sliding manner, a fixture block spring is fixedly connected between the front end face of the fixture block and the front inner wall of the fixture block cavity, the front end face of the fixture block is connected with the other end of an anti-falling rope, the anti-falling rope enters the casing from the front inner wall of the fixture block cavity, two pushing blocks are arranged on the left inner wall and the right inner wall of the control cavity in a sliding manner, the front end face of each pushing block is in contact with the rear end face of the fixture block, a pressing block is arranged in the control cavity in a sliding manner, the hydraulic cavity is connected with the control cavity from the lower inner wall of the control cavity, a pressure rod extending into the control cavity is arranged in the hydraulic cavity in a sliding manner, hydraulic oil is filled in the hydraulic cavity, and the lower end face of the pressing block is fixedly connected with the upper end face of the pressure rod, the lower terminal surface of briquetting with fixed connection is equipped with pressure spring between the lower inner wall in control chamber, be equipped with on the downside rear end face of wall and be located the baffle of control chamber rear side.

Technical Field

The invention relates to the field of LED power supplies, in particular to an LED lamp billboard convenient for installing and replacing an LED power supply.

Background

The LED power supply is one of power supplies, can provide power for electronic equipment, can provide direct current power supplies for equipment such as an LED lamp and the like, and is widely applied because various electronic appliances are more and more common in life;

at the present stage, when the LED lamp advertising board is replaced, people often need workers to climb onto the advertising board, then maintain the LED lamp and replace the LED power supply, and therefore the working content of the workers is greatly increased.

Disclosure of Invention

The technical problem to be solved by the invention is to provide the LED lamp billboard convenient for installing and replacing the LED power supply, so that the problems that the work can be carried out only by climbing up when the circuit of the billboard is maintained are solved, and the billboard can be moved down by a machine to be maintained conveniently.

The invention is realized by the following technical scheme.

The invention relates to an LED lamp billboard convenient for installing and replacing an LED power supply, which comprises a casing, wherein working cavities with forward openings are arranged on the front end surfaces of the left side and the right side of the casing, a lifting mechanism is arranged in the working cavities, a wall is arranged on the front side of the casing, a pedal cavity connected with the two working cavities is arranged on the lower inner wall of the working cavity, a treading mechanism is arranged in the pedal cavity, a supporting mechanism is arranged in the wall, a control cavity is arranged on the lower side of the wall, a control mechanism is arranged in the control cavity, the lifting mechanism comprises two pairs of U-shaped cavities which are respectively arranged on the left inner wall and the right inner wall of different working cavities and have opposite openings, lifting plates extending into different working cavities are fixedly arranged on the left rear end surface and the right rear end surface of the upper side of the wall, and a lifting square rod penetrating through the lifting plates is arranged between the lower rear ends of the same pair of the U-shaped cavities in a friction connection way, the rear end surfaces of the two lifting plates are respectively provided with a hydraulic cavity with a backward opening, a hydraulic rod is arranged in the hydraulic cavity in a sliding manner, a lifting block is fixedly arranged at the rear end of the hydraulic rod, lifting racks are fixed at the upper end and the rear end of the lifting block, a transmission cavity with a rightward opening is arranged on the left inner wall of the upper side of the working cavity at the left side, a transmission motor is fixedly arranged on the left inner wall of the transmission cavity, an upper lifting shaft is connected between the right end surface of the transmission motor and the right inner wall of the working cavity at the right side, the left end of the upper lifting shaft is provided with a centrifugal wheel positioned in the transmission cavity, a centrifugal cavity with an opening far away from the circle center is arranged in the centrifugal wheel, a centrifugal block is arranged in the centrifugal cavity in a sliding manner, a centrifugal spring is fixedly connected between the end surface of the centrifugal block close to the circle center and the inner wall of the centrifugal cavity close to the circle center, and a button cavity with a downward opening is arranged on the upper inner wall of the transmission cavity, the button intracavity slides and is equipped with the button, the upside left end face of button is equipped with the connecting plate, connect the one end of spacing rope on the lower terminal surface of connecting plate, the spacing rope is followed enter into on the lower inner wall of button cavity within the casing, the up end of button with fixed connection is equipped with the button spring between the last inner wall of button cavity, go up the epaxial fixed two that are equipped with respectively of lift and be located the difference the left last athey wheel of working chamber, go up fixed two that are located the difference respectively on the lift axle the back athey wheel on working chamber right side, all rotate between the inner wall about two working chamber front sides and be equipped with preceding lift axle, the epaxial fixed front athey wheel that is equipped with of preceding lift, preceding athey wheel with connect through the track transmission between the back athey wheel, and the outside of track has the tooth.

Furthermore, a lower lifting shaft is rotatably arranged on the left inner wall of the lower side of the left working cavity, a lower lifting shaft is also rotatably arranged between the left inner wall and the right inner wall of the lower side of the right working cavity, lower crawler wheels are fixedly connected to the lifting shafts, a crawler belt with teeth on the outer side is connected between the lower crawler wheels and the upper crawler wheels, a pushing cavity with a leftward opening is arranged on the right inner wall of the lower side of the left working cavity, a pushing shaft is rotatably arranged on the right inner wall of the pushing cavity, a limiting wheel with a limiting groove is fixedly arranged at the left end of the pushing shaft, a connecting block is fixedly arranged at the left end of the pushing shaft, the connecting block extends into the right end face of the lower lifting shaft, the connecting block is in friction connection with the lower lifting shaft, a limiting cavity with an upward opening and positioned on the lower side of the limiting wheel is arranged on the lower inner wall of the pushing cavity, and a limiting block is slidably arranged in the limiting cavity, the lower terminal surface of stopper with fixed connection is equipped with spacing spring between the lower inner wall in spacing chamber, connect the other end that has spacing rope on the lower inner wall of stopper, spacing rope follows enter into on the lower inner wall in spacing chamber within the casing, it is equipped with the promotion axle to rotate on the back inner wall in chamber to release, the rear end of promotion axle is fixed and is equipped with the worm wheel, the turbine with release epaxial thread engagement, be equipped with on the right side rear inner wall of lifter and run through from top to bottom the screens chamber of lifter, the front end threaded connection who promotes the axle is equipped with releases the sleeve, just release the sleeve and stretch into the screens intracavity, it is equipped with the screens piece to release telescopic front end fixed.

Further, step on the mechanism and establish including sliding the footboard of footboard intracavity, be equipped with horizontal kicking block on the lower inner wall in footboard chamber, just the preceding terminal surface of kicking block with the rear end face of footboard contacts each other, the fixed catch bar that is equipped with on the lower inner wall of lifter block, the catch bar with the rear end face contact of footboard, the rear inner wall in footboard chamber with fixed connection is equipped with the pedal spring between the rear end face of footboard.

Further, the supporting mechanism comprises an escalator cavity positioned on the rear end face of the right side of the wall, a supporting cavity with a backward opening is arranged on the rear end face of the left side of the wall, a connecting rack extending into the supporting cavity is slidably arranged on the left inner wall of the escalator cavity, two fixed blocks are fixedly arranged on the rear end face of the right side of the connecting rack, the rear ends of the fixed blocks are fixedly connected with the escalator, two rotating cavities which are contacted with the rear end face of the wall are respectively arranged on the left inner wall and the right inner wall of the supporting cavity, two supporting shafts are rotatably arranged between the upper inner wall and the lower inner wall of the middle part of the supporting cavity, two connecting gears which are mutually meshed are fixedly arranged at the lower ends of the two supporting shafts, pushing gears which are mutually meshed with the connecting rack are fixedly arranged at the upper end of the supporting shaft on the right side, and two supporting plates which respectively extend into different rotating cavities are fixedly arranged at the lower ends of the two supporting shafts, and the right side rotating cavity is connected with the staircase cavity.

Further, be equipped with the fixed chamber that the opening is backward on the upside rear end face of wall, be equipped with before the upside of casing on the terminal surface with the chamber that falls is prevented of fixed chamber parallel and level, fixed intracavity slides and is equipped with and stretches into prevent falling the piece of preventing of intracavity, the rear end face slope of preventing the piece that falls is downward, prevent the preceding terminal surface of piece with be connected with between the preceding inner wall of fixed chamber and prevent falling the spring, be connected with the one end of preventing falling the rope on preventing the preceding terminal surface of piece, prevent falling the rope follow enter into on the preceding inner wall of fixed chamber in the wall.

Furthermore, the control mechanism comprises a clamping block cavity with a backward opening on the front inner wall of the control cavity, a clamping block is arranged in the clamping block cavity in a sliding manner, a clamping block spring is fixedly connected between the front end surface of the clamping block and the front inner wall of the clamping block cavity, the front end surface of the clamping block is connected with the other end of an anti-falling rope, the anti-falling rope enters the casing from the front inner wall of the clamping block cavity, two pushing blocks are arranged on the left inner wall and the right inner wall of the control cavity in a sliding manner, the front end surface of each pushing block is in contact with the rear end surface of the clamping block, a pressing block is arranged in the control cavity in a sliding manner, the hydraulic cavity is connected with the control cavity from the lower inner wall of the control cavity, a pressure rod extending into the control cavity is arranged in the hydraulic cavity in a sliding manner, hydraulic oil is filled in the hydraulic cavity, and the lower end surface of the pressing block is fixedly connected with the upper end surface of the pressure rod, the lower terminal surface of briquetting with fixed connection is equipped with pressure spring between the lower inner wall in control chamber, be equipped with on the downside rear end face of wall and be located the baffle of control chamber rear side.

The invention has the beneficial effects that: the LED power supply maintenance platform is simple in structure and convenient and fast to operate, when the LED power supply maintenance platform is used and needs to be carried out or replaced on the lower portion, the advertising board can be moved down and pushed forward to facilitate maintenance of workers, and when the condition that maintenance needs to be carried out on the upper portion is met, the advertising board can be automatically moved forward, and a platform is built for the workers to carry out replacement and maintenance on the upper portion.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic structural diagram at A-A of FIG. 1 in accordance with an embodiment of the present invention;

FIG. 3 is a schematic structural diagram at B-B of FIG. 2 according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram at C-C of FIG. 2 according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram at D-D of FIG. 2 according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram at E-E of FIG. 2 according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of the structure at F in FIG. 2 according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of the structure at G in FIG. 3 according to an embodiment of the present invention.

Detailed Description

The invention will now be described in detail with reference to fig. 1-8, wherein for ease of description the orientations described below are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

Combine accompanying drawing 1-8 LED lamp bill-board convenient to LED power is changed in installation, including casing 10, be equipped with the forward working chamber 12 of opening on the terminal surface before the left and right sides of casing 10, be equipped with elevating system in the working chamber 12, the front side of casing 10 is equipped with wall 22, be equipped with on the lower inner wall of working chamber 12 with two footboard chamber 11 that working chamber 12 all links to each other, be equipped with in footboard chamber 11 and step on the mechanism, be equipped with supporting mechanism in the wall 22, the downside of wall 22 is equipped with control chamber 53, be equipped with control mechanism in the control chamber 53, elevating system includes that two pairs are located the difference respectively just same U-shaped chamber 59 that opens opposite directions on the inner wall about working chamber 12, all fixedly on the left and right rear end face of upside of wall 22 be equipped with and stretch into the difference elevating plate 58 in the working chamber 12, it is same right friction connection is equipped with and runs through between the lower rear end in U-line chamber 59 the direction elevating system of elevating plate 58 A rod 60, a hydraulic cavity 18 with a backward opening is arranged on the rear end face of each of the two lifting plates 58, a hydraulic rod 19 is arranged in the hydraulic cavity 18 in a sliding manner, a lifting block 57 is fixedly arranged at the rear end of the hydraulic rod 19, lifting racks 13 are fixed at the upper end and the rear end of the lifting block 57, a transmission cavity 29 with a rightward opening is arranged on the left inner wall of the upper side of the working cavity 12 on the left side, a transmission motor 30 is fixedly arranged on the left inner wall of the transmission cavity 29, an upper lifting shaft 46 is connected between the right end face of the transmission motor 30 and the right inner wall of the working cavity 12 on the right side, a centrifugal wheel 31 positioned in the transmission cavity 29 is arranged at the left end of the upper lifting shaft 46, a centrifugal cavity 32 with an opening far away from the center of a circle is arranged in the centrifugal wheel 31, a centrifugal block 34 is arranged in the centrifugal cavity 32 in a sliding manner, and a centrifugal spring 33 is fixedly connected between the end face of the centrifugal block 32 close to the center of the circle and the inner wall of the centrifugal cavity 32 close to the center of the circle, the upper inner wall of the transmission cavity 29 is provided with a button cavity 51 with a downward opening, a button 49 is arranged in the button cavity 51 in a sliding manner, the left end face of the upper side of the button 49 is provided with a connecting plate 28, the lower end face of the connecting plate 28 is connected with one end of a limiting rope 35, the limiting rope 35 enters the casing 10 from the lower inner wall of the button cavity 51, the upper end face of the button 49 is fixedly connected with the upper inner wall of the button cavity 51 and provided with a button spring 50, the upper lifting shaft 46 is respectively and fixedly provided with two upper crawler wheels 48 which are positioned at the left sides of the different working cavities 12, the upper lifting shaft 46 is respectively and fixedly provided with two rear crawler wheels 47 which are positioned at the right sides of the different working cavities 12, the left and right inner walls at the front sides of the two working cavities 12 are respectively and rotatably provided with a front lifting shaft 20, the front crawler wheels 27 are respectively and fixedly provided on the front lifting shaft 20, and the front crawler wheels 27 are connected with the rear crawler wheels 47 through crawler transmission, and the outer side of the crawler belt is provided with teeth.

Beneficially, a lower lifting shaft 37 is rotatably arranged on the left inner wall of the lower side of the left working cavity 12, a lower lifting shaft 37 is also rotatably arranged between the left inner wall and the right inner wall of the lower side of the right working cavity 12, a lower crawler wheel 36 is fixedly connected to the lifting shaft 37, a crawler belt with teeth on the outer side is connected between the lower crawler wheel 36 and the upper crawler wheel 48, a push-out cavity 56 with a leftward opening is arranged on the right inner wall of the lower side of the left working cavity 12, a push-out shaft 43 is rotatably arranged on the right inner wall of the push-out cavity 56, a limit wheel 42 with a limit groove is fixedly arranged at the left end of the push-out shaft 43, a connecting block 38 is fixedly arranged at the left end of the push-out shaft 43, the connecting block 38 extends into the right end face of the lower lifting shaft 37, the connecting block 38 is frictionally connected with the lower lifting shaft 37, a limit cavity 40 with an upward opening and positioned at the lower side of the limit wheel 42 is arranged on the lower inner wall of the push-out cavity 56, slide in the spacing chamber 40 and be equipped with stopper 41, the lower terminal surface of stopper 41 with fixed connection is equipped with spacing spring 39 between the lower inner wall in spacing chamber 40, be connected with the other end that has spacing rope 35 on the lower inner wall of stopper 41, spacing rope 35 is followed enter into on the lower inner wall in spacing chamber 40 within the casing 10, it is equipped with on the rear inner wall of release chamber 56 and promotes axle 44 to rotate, the rear end that promotes axle 44 is fixed and is equipped with worm wheel 45, turbine 45 with the threaded engagement who promotes on the axle 43, it runs through from top to bottom to be equipped with on the right side rear inner wall of lifter 60 the screens chamber 78 of lifter 60, the front end threaded connection who promotes axle 44 is equipped with releases sleeve 61, just release sleeve 61 stretches into in the screens chamber 78, the front end that releases sleeve 61 is fixed and is equipped with screens piece 77.

Advantageously, the treading mechanism comprises a pedal 17 slidably arranged in the pedal cavity 11, a transverse top block 16 is arranged on the lower inner wall of the pedal cavity 11, the front end surface of the top block 16 and the rear end surface of the pedal 17 are in contact with each other, a push rod 14 is fixedly arranged on the lower inner wall of the lifting block 57, the push rod 14 is in contact with the rear end surface of the pedal 17, and a pedal spring 15 is fixedly connected between the rear inner wall of the pedal cavity 11 and the rear end surface of the pedal 17.

Beneficially, the supporting mechanism includes an escalator cavity 65 located on the rear end face on the right side of the wall 22, a supporting cavity 79 with a backward opening is arranged on the rear end face on the left side of the wall 22, a connecting rack 64 extending into the supporting cavity 79 is slidably arranged on the inner wall on the left side of the escalator cavity 65, two fixing blocks 63 are fixedly arranged on the rear end face on the right side of the connecting rack 64, an escalator 62 is arranged at the rear end of each fixing block 63, two rotating cavities 66 are arranged on the inner wall on the left and right sides of the supporting cavity 79 and are contacted with the rear end face of the wall, two supporting shafts 70 are rotatably arranged between the upper inner wall and the lower inner wall of the middle part of the supporting cavity 79, two supporting shafts 77 are fixedly provided with two connecting gears 68 which are mutually meshed, the upper end of each supporting shaft 70 is fixedly provided with a pushing gear 69 which is mutually meshed with the connecting rack 64, and two supporting shafts 70 are fixedly provided with two supporting plates 67 which extend into different rotating cavities 66 And the right hand side of the rotating chamber 66 is connected to the staircase chamber 65.

Beneficially, be equipped with the fixed chamber 23 that the opening is backward on the upside rear end face of wall 22, be equipped with before the upside of casing 10 with the chamber 26 that falls is prevented to fixed chamber 23 parallel and level, it stretches into to slide in the fixed chamber 23 prevent falling the piece 25 that falls in the chamber 26, the rear end face slope of preventing falling piece 25 is downward, prevent falling the piece 25 the preceding terminal surface with be connected with between the preceding inner wall of fixed chamber 23 and prevent falling spring 24, be connected with the one end of preventing falling rope 21 on preventing falling piece 25 the preceding terminal surface, prevent falling rope 21 follow enter into on the preceding inner wall of fixed chamber 23 in the wall 22.

Advantageously, the control mechanism comprises a clamping block cavity 54 which is located on the front inner wall of the control cavity 53 and opens backwards, a clamping block 55 is slidably arranged in the clamping block cavity 54, a clamping block spring 75 is fixedly connected between the front end surface of the clamping block 55 and the front inner wall of the clamping block cavity 54, the front end surface of the clamping block 55 is connected with the other end of the anti-falling rope 21, the anti-falling rope 21 enters the machine shell 10 from the front inner wall of the clamping block cavity 54, two pushing blocks 52 are slidably arranged on the left and right inner walls of the control cavity 53, the front end surface of the pushing block 52 is in contact with the rear end surface of the clamping block 55, a pressing block 76 is slidably arranged in the control cavity 53, the hydraulic cavity 18 is connected with the control cavity 53 from the lower inner wall of the control cavity 53, a pressure rod 74 which extends into the control cavity 53 is slidably arranged in the hydraulic cavity 18, and the hydraulic cavity 18 is filled with hydraulic oil, the lower end face of the pressing block 76 is fixedly connected with the upper end face of the pressure rod 74, the lower end face of the pressing block 76 is fixedly connected with the lower inner wall of the control cavity 53, a pressure spring 73 is arranged, and a baffle plate 72 located on the rear side of the control cavity 53 is arranged on the rear end face of the lower side of the wall 22.

Sequence of mechanical actions of the whole device:

1: when the LED power supply of the whole billboard needs to be maintained and replaced below, the baffle plate 72 is opened, then the pressing block 76 is pressed, so that the pressure rod 74 descends, hydraulic oil in the hydraulic cavity 18 is pressed, the two hydraulic rods 19 are pushed backwards, the lifting rack 13 on the lifting block 57 and the crawler between the upper crawler wheel 48 and the lower crawler wheel 36 are contacted and pressed, after the pressing block 76 is completely pressed, the fixture block 55 is pushed backwards under the action of the fixture block spring 75, the pressing block 76 is limited, and the pressing block 76 is pushed backwards to pull the anti-falling rope 21, so that the anti-falling block 25 moves forwards, and the shell 10 loses the limitation of the up-and-down movement;

2: then the transmission motor 30 rotates slowly, so that the upper lifting shaft 46 rotates slowly to drive the upper crawler wheel 48 and the lower crawler wheel 36 to rotate, so as to drive the crawler between the upper crawler wheel and the lower crawler wheel to move downwards together with the casing 10 and the structure on the upper crawler wheel, when the upper lifting shaft 46 moves to the lowest side, the lifting rack 13 and the crawler connected between the rear crawler wheel 47 and the front crawler wheel 27 are contacted, as the upper lifting shaft 46 rotates, the crawler between the rear crawler wheel 47 and the front crawler wheel 27 is driven to rotate, so that the casing 10 and the structure on the casing are pushed backwards, a space is provided for maintenance and replacement of workers, and then the workers only need to enter between the casing 10 and the wall 22 to perform LED power supply replacement or installation and maintenance work on the advertising board;

3: the drive motor 30 is then reversed, reversing the upper lift shaft 46, reversing the rear track wheels 47, the upper track wheels 48, the front track wheels 27 and the lower track wheels 36, so that the caterpillar tracks thereon are also moved in the reverse direction, and the casing 10 and the mechanism thereon are reset by moving forward first, and then reset by moving upward, after the reset is completed, the transmission motor 30 is turned off, and the baffle 72 is turned off, so that the baffle 72 presses the pushing block 52, the pushing block 52 presses the fixture block 55, the fixture block 55 moves forwards to reset, the anti-falling block 25 moves backwards and resets under the action of the anti-falling spring 24, the machine shell 10 is limited again, the limit of the pressing block 76 is released due to the forward movement resetting of the clamping block 55, so that the pressing block 76 moves upwards to reset under the action of the pressure spring 73, the pressure rod 74 moves upwards together, and the two hydraulic rods 19 and the lifting block 57 are driven to move forwards to reset;

4: when maintenance needs to be performed on the upper portion under special conditions, the transmission motor 30 rotates at a high speed to drive the upper lifting shaft 46 to rotate quickly, so that the centrifugal wheel 31 rotates quickly, the centrifugal block 34 is thrown out under the action of centrifugal force, the button 49 is pressed to move upwards, so that the button 49 pulls the limiting rope 35, the limiting block 41 moves downwards, the limiting on the limiting wheel 42 is relieved, then the upper lifting shaft 46 drives the upper crawler wheel 48, the lower crawler wheel 36, the lower lifting shaft 37, the connecting block 38 and the pushing shaft 43 to rotate, so that the worm wheel 45 and the pushing shaft 44 are driven to rotate, the pushing sleeve 61 is driven to be pushed rightwards, so that the casing 10 and equipment on the casing 10 move leftwards to vacate a space for maintenance, the pushing rod 14 can limit the leftward movement of the pedal 17, so that the pedal 17 extends out of the pedal cavity 11, then the escalator 62 moves leftwards to drive the fixing block 63, the escalator 62, The connecting rack 64 moves leftwards together to drive the pushing gear 69, the right supporting shaft 70 and the right supporting plate 67 to rotate, so that the right supporting plate rotates out to reinforce the machine shell 10, and the right supporting shaft 70 rotates to drive the right connecting gear 68, the left connecting gear 68 and the left supporting plate 67 to rotate together to support the right supporting plate 67, so that a person can climb up from the escalator 62 to maintain and replace the machine;

5: when the maintenance is finished, the escalator is moved back to the original position, the connecting rack 64 moves rightwards to reset, the two supporting shafts 70 are driven to rotate reversely, the structures on the supporting shafts are driven to rotate reversely together, then the transmission motor 30 rotates reversely, the upper lifting shaft 46 is driven to rotate reversely, the upper crawler wheel 48, the lower crawler wheel 36, the lower lifting shaft 37, the connecting block 38, the pushing shaft 43, the movable worm wheel 45 and the pushing shaft 44 rotate reversely, the machine shell 10 and the structures on the machine shell are driven to move forwards to reset together, then the transmission motor 30 stops rotating, the centrifugal block 34 is pulled inwards under the action of the centrifugal spring 33, the downward pushing button 49 is reset under the action of the driving force 50, and the limiting wheel 42 is limited again under the action of the upward movement reset of the driving force 41.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.