CN111732036A

CN111732036A - Lightweight fire engine rotary table capable of improving vehicle maneuverability

Info

Publication number: CN111732036A
Application number: CN202010642950.XA
Authority: CN
Inventors: 吴梅丽
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-06
Filing date: 2020-07-06
Publication date: 2020-10-02

Abstract

The invention discloses a light fire fighting truck rotary table for improving vehicle maneuverability, which comprises a fire fighting truck body, wherein the fire fighting truck body comprises a truck head section and a truck tail section, the truck tail section is provided with the rotary table, the rotary table comprises a driving assembly, the driving assembly is fixedly connected with the rotary table, the rotary table is fixedly connected with a supporting plate, the supporting plate is hinged with a force arm through a pin shaft, the rotary table is provided with an amplitude-variable oil cylinder, the amplitude-variable oil cylinder is hinged with the force arm, the end part of the force arm is connected with a manned platform through a connecting arm, the manned platform is provided with an inclined alarm transmitting assembly, and the; drive the carousel through drive assembly and rotate, can adjust manned platform's position, through set up slope warning emission subassembly on manned platform, can send alarm signal when manned platform takes place to incline, through set up receiving assembly at rear of a vehicle section top, receive alarm signal, then report to the police, the condition of manned platform is in time known to the fire fighter of being convenient for, and the security is high.

Description

Lightweight fire engine rotary table capable of improving vehicle maneuverability

Technical Field

The invention relates to the technical field of fire trucks, in particular to a light-weight fire truck rotary table for improving the maneuverability of a vehicle.

Background

Fire trucks, also known as fire trucks, refer to special vehicles that are used primarily to perform fire-fighting tasks, and most national fire departments, including china, also use them for other emergency rescue purposes. The fire engine can transport firefighters to a disaster site and provide a variety of tools for performing disaster relief tasks. Modern fire trucks are usually equipped with steel ladders, water guns, portable fire extinguishers, self-contained respirators, protective clothing, breaking and dismantling tools, first-aid tools and the like, and some fire extinguishing devices can also carry large fire extinguishing equipment such as water tanks, water pumps, foam fire extinguishing devices and the like.

Because the fire engine is when using, generally all need the revolving stage to be in the state of continuous operation, the unstable condition of revolving stage can appear in the revolving stage continuous operation, when using the fire engine revolving stage to rescue people simultaneously, manned platform is in the high air, operates through the inside staff of fire engine, makes the revolving stage be in stable condition, works as because manned platform place height is higher, underground fire fighter hardly confirms whether manned platform inclines, especially at night, and the field of vision is relatively poor, is difficult to confirm the condition of manned platform.

Based on the above, the invention designs a light fire engine turntable capable of improving vehicle maneuverability to solve the above mentioned problems.

Disclosure of Invention

The invention aims to provide a light fire truck turntable for improving vehicle maneuverability, a turntable is driven by a driving assembly to rotate, the position of a manned platform can be adjusted, a shock absorption assembly is arranged to absorb shock when the driving motor works, an inclined alarm transmitting assembly is arranged on the manned platform to transmit an alarm signal when the manned platform is inclined, a receiving assembly is arranged at the top of a tail section of a vehicle, the inclined alarm transmitting assembly is wirelessly connected with the receiving assembly to receive the alarm signal and then alarm, so that a fire fighter can know the condition of the manned platform in time, the safety is high, and the problems in the background technology are solved.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an improve lightweight fire engine revolving stage of vehicle mobility, includes the fire engine body, the fire engine body includes locomotive section and rear of a vehicle section, install the revolving stage on the rear of a vehicle section, the revolving stage includes drive assembly, drive assembly fixed connection is in the rear of a vehicle section, fixed connection between drive assembly and the carousel, fixedly connected with backup pad on the carousel, the backup pad articulates through the round pin axle has the arm of force, install the variable amplitude hydro-cylinder on the carousel, the flexible end of variable amplitude hydro-cylinder is articulated mutually with the arm of force, arm of force tip is connected with manned platform through the linking arm, be equipped with slope warning emission subassembly on the manned platform, rear of a vehicle section top is equipped with receiving assembly, wireless connection between slope warning emission subassembly and the receiving assembly.

Preferably, the driving assembly comprises a case, the case is fixedly connected with the tail section of the vehicle, a driving motor is arranged in the case, damping assemblies are arranged on two sides of the driving motor, a first rotating shaft is fixedly connected to the output end of the driving motor, the first rotating shaft is connected with the input end of the reduction gearbox, a second rotating shaft is fixedly connected to the output end of the reduction gearbox, the second rotating shaft penetrates through the case and is fixedly connected with the turntable, and the second rotating shaft is rotatably connected with the case through a bearing.

Preferably, damper assembly includes the shock attenuation shell, shock attenuation shell inner wall fixedly connected with damping spring, the first shock attenuation board of damping spring tip fixedly connected with, fixedly connected with shock-absorbing rod on the first shock attenuation board, the shock-absorbing rod passes the shock attenuation shell, sliding connection between shock-absorbing rod and the shock attenuation shell, shock-absorbing rod outer end fixedly connected with second shock attenuation board, it has the shock pad to bond on the second shock attenuation board.

Preferably, the shock pad is elastic rubber pad, shock pad and driving motor outer wall frictional contact, the shock attenuation pole is equipped with two sets at least.

Preferably, a chute is formed in the tail section and is circular, a supporting block is arranged in the chute and is in sliding contact with the inner bottom wall of the chute, a supporting rod is fixedly connected to the top of the supporting block, and the top end of the supporting rod is fixedly connected with the bottom of the rotary table.

Preferably, the slope warning emission subassembly includes insulating casing, insulating casing is the tube-shape, insulating casing inner wall fixedly connected with metal section of thick bamboo, metal section of thick bamboo both ends opening, roof center fixedly connected with articulated elements in the insulating casing, articulated elements bottom articulates there is the metal rod, roof left side is equipped with the battery in the insulating casing, roof right side is equipped with signal transmitter in the insulating casing.

Preferably, the positive electrode of the storage battery is electrically connected with the metal rod, and the negative electrode of the storage battery is electrically connected with the signal emitter and the metal cylinder.

Preferably, the receiving assembly comprises a receiving shell, a signal receiver is arranged on the left side in the receiving shell, a controller is arranged on the right side in the receiving shell, buzzers are arranged on two sides in the receiving shell, and the signal receiver, the controller and the buzzers are electrically connected.

The use method of the fire fighting truck rotary table comprises the following steps: when the fire fighting truck is used, the fire fighting truck body is opened to a place to be used, the control panel in the truck head section controls the amplitude-variable oil cylinder to extend, the amplitude-variable oil cylinder drives the power arm to move, the force arm drives the manned platform to move upwards through the connecting arm, the control panel in the truck head section starts the driving motor, the driving motor drives the first rotating shaft to rotate, after the speed reduction is carried out by the reduction box, the second rotating shaft rotates, the second rotating shaft drives the turntable to rotate, the turntable rotates through the supporting rod supporting block, the supporting block slides in the chute, the supporting block and the supporting rod can support the turntable, the turntable can be more stable when rotating, the force arm, the connecting arm and the manned platform rotate along with the turntable, the position of the manned platform can be adjusted, the driving motor generates vibration when working, the damping pad, the second damping plate, the damping rod, the first damping plate and, prevent that driving motor vibration is too big, when manned platform takes place the slope, the metal rod rotates round the articulated elements, contacts between metal rod and the metal cylinder, constitutes closed circuit between battery, metal rod, metal cylinder and the signal transmitter, signal transmitter transmitting signal, through controller control buzzer behind the signal receiver received signal and begin work, buzzer sounds, reminds people manned platform to be in the tilt state.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the turntable is driven to rotate by the driving assembly, the position of the manned platform can be adjusted, the shock absorption assembly is arranged to absorb shock when the driving motor works, the inclined alarm transmitting assembly is arranged on the manned platform to transmit an alarm signal when the manned platform is inclined, the receiving assembly is arranged at the top of the tail section of the vehicle, the inclined alarm transmitting assembly is wirelessly connected with the receiving assembly to receive the alarm signal, then the alarm is given, so that fire fighters can know the condition of the manned platform in time, and the safety is high.

2. According to the invention, when the turntable rotates, the turntable rotates through the supporting block of the supporting rod, the supporting block slides in the chute, and the supporting block and the supporting rod can support the turntable, so that the turntable is more stable when rotating, and the unstable condition of the turntable is prevented.

3. According to the invention, the driving motor generates vibration when working, the shock pad, the second shock absorption plate, the shock absorption rod, the first shock absorption plate and the shock absorption spring can play a role of multiple shock absorption and buffering in sequence, so that the driving motor is prevented from vibrating too much, and the damage of the driving motor caused by vibration is avoided.

4. In the invention, when the manned platform inclines, the metal rod is contacted with the metal cylinder, a closed loop is formed among the storage battery, the metal rod, the metal cylinder and the signal transmitter, the signal transmitter transmits a signal, the signal receiver receives the signal and then controls the buzzer to start working through the controller, and the buzzer sounds to remind a fire fighter that the manned platform is in an inclined state and the manned platform is required to be adjusted.

Drawings

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

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

FIG. 2 is a schematic view of a driving assembly according to the present invention;

FIG. 3 is a schematic view of the shock absorbing assembly of the present invention;

FIG. 4 is a schematic structural view of a tilting alarm transmitting assembly of the present invention;

FIG. 5 is a schematic view of a receiving assembly according to the present invention.

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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1-3, the present invention provides a light weight fire truck turntable technical scheme for improving vehicle maneuverability: the fire fighting truck comprises a fire fighting truck body, wherein the fire fighting truck body comprises a truck head section 1 and a truck tail section 2, a turntable is arranged on the truck tail section 2, the turntable comprises a driving assembly 4, a turntable 5 is driven by the driving assembly 4 to rotate, the position of a manned platform 13 can be adjusted, the driving assembly 4 is fixedly connected to the truck tail section 2, the driving assembly 4 is fixedly connected with the turntable 5, a supporting plate 6 is fixedly connected to the turntable 5, the supporting plate 6 is hinged to a force arm 7 through a pin shaft, an amplitude-variable oil cylinder 8 is arranged on the turntable 5, the telescopic end of the amplitude-variable oil cylinder 8 is hinged to the force arm 7, the end part of the force arm 7 is connected with the manned platform 13 through a connecting arm 12, the control panel in the truck head section 1 controls the amplitude-variable oil cylinder 8 to extend, the amplitude-variable oil cylinder 8 drives the power arm 7 to move, the manned platform 13 is provided with an inclined alarm transmitting assembly 14 which can transmit an alarm signal when the manned platform is inclined, the top of the tail section 2 is provided with a receiving assembly 3 which receives the alarm signal and then gives an alarm, and the inclined alarm transmitting assembly 14 is wirelessly connected with the receiving assembly 3.

The driving assembly 4 comprises a case 41, the case 41 is fixedly connected with the tail section 2, a driving motor 42 is arranged in the case 41, damping assemblies 47 are arranged on two sides of the driving motor 42, a first rotating shaft 43 is fixedly connected to an output end of the driving motor 42, the first rotating shaft 43 is connected with an input end of a reduction gearbox 44, a second rotating shaft 45 is fixedly connected to an output end of the reduction gearbox 44, the second rotating shaft 45 penetrates through the case 41 and is fixedly connected with the rotating disc 5, the driving motor 42 drives the first rotating shaft 43 to rotate, after the speed of the reduction gearbox 44 is reduced, the second rotating shaft 45 rotates, the second rotating shaft 45 drives the rotating disc 5 to rotate, and the second rotating shaft 45 is rotatably connected with the case 41 through a bearing 46.

Wherein, the shock absorption assembly 47 includes a shock absorption housing 471, a shock absorption spring 473 is fixedly connected to the inner wall of the shock absorption housing 471, the end of the shock absorption spring 473 is fixedly connected with a first shock absorption plate 472, a shock absorption rod 474 is fixedly connected to the first shock absorption plate 472, the shock absorption rod 474 passes through the shock absorption housing 471, the shock absorption rod 474 is slidably connected to the shock absorption housing 471, the outer end of the shock absorption rod 474 is fixedly connected with a second shock absorption plate 475, a shock absorption pad 476 is bonded to the second shock absorption plate 475, the shock absorption pad 476 is an elastic rubber pad, the shock absorption effect is good, the shock absorption pad 476 is in frictional contact with the outer wall of the driving motor 42, the driving motor 42 generates vibration when in operation, the shock absorption pad 476, the second shock absorption plate 475, the shock absorption rod 474, the first shock absorption plate 472 and the shock absorption spring 473 can sequentially play a role in shock absorption and buffer, so as to prevent the, the stability is good when absorbing shock.

Example 2

Referring to fig. 1-5, the present invention provides a light weight fire truck turntable technical scheme for improving vehicle maneuverability: the fire fighting truck comprises a fire fighting truck body, wherein the fire fighting truck body comprises a truck head section 1 and a truck tail section 2, a turntable is arranged on the truck tail section 2, the turntable comprises a driving assembly 4, a turntable 5 is driven by the driving assembly 4 to rotate, the position of a manned platform 13 can be adjusted, the driving assembly 4 is fixedly connected to the truck tail section 2, the driving assembly 4 is fixedly connected with the turntable 5, a supporting plate 6 is fixedly connected to the turntable 5, the supporting plate 6 is hinged to a force arm 7 through a pin shaft, an amplitude-variable oil cylinder 8 is arranged on the turntable 5, the telescopic end of the amplitude-variable oil cylinder 8 is hinged to the force arm 7, the end part of the force arm 7 is connected with the manned platform 13 through a connecting arm 12, the control panel in the truck head section 1 controls the amplitude-variable oil cylinder 8 to extend, the amplitude-variable oil cylinder 8 drives the power arm 7 to move, the manned platform 13 is provided with an inclined alarm transmitting assembly 14 which can transmit an alarm signal when the manned platform is inclined, the top of the tail section 2 is provided with a receiving assembly 3 which receives the alarm signal and then gives an alarm, and the inclined alarm transmitting assembly 14 is wirelessly connected with the receiving assembly 3.

The rear section 2 is provided with a chute 11, the chute 11 is circular, a supporting block 10 is arranged in the chute 11, the supporting block 10 is in sliding contact with the bottom wall in the chute 11, a supporting rod 9 is fixedly connected to the top of the supporting block 10, the top end of the supporting rod 9 is fixedly connected to the bottom of the turntable 5, when the turntable 5 rotates, the turntable 5 rotates through the supporting block 10 of the supporting rod 9, the supporting block 10 slides in the chute 11, and the supporting block 10 and the supporting rod 9 can support the turntable 5, so that the turntable 5 is more stable when rotating.

Wherein, the inclined alarm transmitting assembly 14 comprises an insulating housing 141, the insulating housing 141 is cylindrical, a metal cylinder 142 is fixedly connected to the inner wall of the insulating housing 141, two ends of the metal cylinder 142 are open, a hinge 145 is fixedly connected to the center of the inner top wall of the insulating housing 141, a metal rod 143 is hinged to the bottom of the hinge 145, a storage battery 146 is arranged on the left side of the inner top wall of the insulating housing 141, a signal transmitter 144 is arranged on the right side of the inner top wall of the insulating housing 141, the positive electrode of the storage battery 146 is electrically connected with the metal rod 143, the negative electrode of the storage battery 146 is electrically connected with the signal transmitter 144 and the metal cylinder 142, when the manned platform 13 is inclined, the metal rod 143 rotates around the hinge 145, the metal rod 143 contacts with the metal cylinder 142, and a closed loop is formed among the storage battery 146, the metal rod 143, the signal transmitter 144 transmits a signal.

Wherein, receiving element 3 is including receiving shell 31, the left side is equipped with signal receiver 34 in receiving shell 31, the right side is equipped with controller 32 in receiving shell 31, buzzer 33 is all installed to both sides in receiving shell 31, electric connection between signal receiver 34, controller 32 and the buzzer 33, after signal receiver 34 received the signal, control buzzer 33 through controller 32 and begin work, buzzer 33 sounds, reports to the police.

The specific working principle is as follows:

the use method of the fire fighting truck rotary table comprises the following steps: when the fire fighting truck is used, the fire fighting truck body is opened to a place to be used, the control panel in the truck head section 1 is used for controlling the amplitude-variable oil cylinder 8 to extend, the amplitude-variable oil cylinder 8 drives the power arm 7 to move, the force arm 7 drives the manned platform 13 to move upwards through the connecting arm 12, the control panel in the truck head section 1 is used for starting the driving motor 42, the driving motor 42 drives the first rotating shaft 43 to rotate, after the speed is reduced through the reduction box 44, the second rotating shaft 45 rotates, the second rotating shaft 45 drives the rotating disc 5 to rotate, the rotating disc 5 rotates through the supporting block 10 of the supporting rod 9, the supporting block 10 slides in the sliding groove 11, the supporting block 10 and the supporting rod 9 can play a supporting role for the rotating disc 5, so that the rotating disc 5 is more stable in rotation, the force arm 7, the connecting arm 12 and the manned platform 13 rotate together with the rotating, shock pad 476, second shock attenuation board 475, shock attenuation pole 474, first shock attenuation board 472 and damping spring 473 can play the effect of shock attenuation buffering in proper order, prevent that driving motor 42 from vibrating too greatly, when manned platform 13 from taking place the slope, metal rod 143 rotates around articulated elements 145, contact between metal rod 143 and the metal tube 142, battery 146, metal rod 143, constitute closed loop between metal tube 142 and the signal transmitter 144, signal transmitter 144 transmission signal, control buzzer 33 through controller 32 behind the signal receiver 34 received signal and begin work, buzzer 33 sounds, remind people manned platform 13 to be in the tilt state.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides an improve light-weighted fire engine revolving stage of vehicle mobility, includes the fire engine body, its characterized in that: the fire fighting truck body comprises a truck head section (1) and a truck tail section (2), the truck tail section (2) is provided with a turntable, the turntable comprises a driving component (4), the driving component (4) is fixedly connected with the tail section (2), the driving component (4) is fixedly connected with the rotary table (5), the rotary table (5) is fixedly connected with a supporting plate (6), the supporting plate (6) is hinged with a force arm (7) through a pin shaft, the rotary disc (5) is provided with a variable amplitude oil cylinder (8), the telescopic end of the amplitude-variable oil cylinder (8) is hinged with the force arm (7), the end part of the force arm (7) is connected with a manned platform (13) through a connecting arm (12), an inclined alarm transmitting component (14) is arranged on the manned platform (13), a receiving component (3) is arranged at the top of the tail section (2), the inclination alarm transmitting component (14) is wirelessly connected with the receiving component (3).

2. The lightweight fire truck turret for improving vehicle maneuverability according to claim 1, wherein: drive assembly (4) are including quick-witted case (41), fixed connection between quick-witted case (41) and rear of a vehicle section (2), be equipped with driving motor (42) in quick-witted case (41), driving motor (42) both sides all are equipped with damper assembly (47), driving motor (42) output end fixedly connected with first pivot (43), first pivot (43) are connected with reducing gear box (44) input, reducing gear box (44) output end fixedly connected with second pivot (45), second pivot (45) pass quick-witted case (41) and carousel (5) fixed connection, second pivot (45) are connected through rotating between bearing (46) and quick-witted case (41).

3. The lightweight fire truck turret for improving vehicle maneuverability according to claim 2, wherein: shock attenuation subassembly (47) are including shock attenuation shell (471), shock attenuation shell (471) inner wall fixedly connected with damping spring (473), damping spring (473) tip fixedly connected with first shock attenuation board (472), fixedly connected with shock attenuation pole (474) on first shock attenuation board (472), shock attenuation pole (474) pass shock attenuation shell (471), sliding connection between shock attenuation pole (474) and shock attenuation shell (471), shock attenuation pole (474) outer end fixedly connected with second shock attenuation board (475), it has shock pad (476) to bond on second shock attenuation board (475).

4. The lightweight fire truck turret for improving vehicle maneuverability according to claim 3, wherein: the shock absorption pads (476) are elastic rubber pads, the shock absorption pads (476) are in friction contact with the outer wall of the driving motor (42), and at least two groups of shock absorption rods (474) are arranged.

5. The lightweight fire truck turret for improving vehicle maneuverability according to claim 1, wherein: the automobile tail section (2) is provided with a sliding groove (11), the sliding groove (11) is circular, a supporting block (10) is arranged in the sliding groove (11), the supporting block (10) is in sliding contact with the inner bottom wall of the sliding groove (11), the top of the supporting block (10) is fixedly connected with a supporting rod (9), and the top end of the supporting rod (9) is fixedly connected with the bottom of the rotary table (5).

6. The lightweight fire truck turret for improving vehicle maneuverability according to claim 1, wherein: the inclined alarm transmitting assembly (14) comprises an insulating shell (141), the insulating shell (141) is cylindrical, a metal cylinder (142) is fixedly connected to the inner wall of the insulating shell (141), the two ends of the metal cylinder (142) are opened, a hinge piece (145) is fixedly connected to the center of the inner top wall of the insulating shell (141), a metal rod (143) is hinged to the bottom of the hinge piece (145), a storage battery (146) is arranged on the left side of the inner top wall of the insulating shell (141), and a signal transmitter (144) is arranged on the right side of the inner top wall of the insulating shell (141).

7. The lightweight fire truck turret for improving vehicle maneuverability according to claim 6, wherein: the positive pole of the storage battery (146) is electrically connected with the metal rod (143), and the negative pole of the storage battery (146) is electrically connected with the signal emitter (144) and the metal cylinder (142).

8. The lightweight fire truck turret for improving vehicle maneuverability according to claim 1, wherein: the receiving component (3) comprises a receiving shell (31), a signal receiver (34) is arranged on the left side in the receiving shell (31), a controller (32) is arranged on the right side in the receiving shell (31), buzzers (33) are installed on two sides in the receiving shell (31), and the signal receiver (34), the controller (32) and the buzzers (33) are electrically connected.

9. The lightweight fire truck turret for improving vehicle maneuverability according to any of claims 1-8, wherein the method of using the fire truck turret is: when the fire fighting truck is used, the fire fighting truck body is opened to a place to be used, the variable amplitude oil cylinder (8) is controlled to extend through a control panel in the truck head section (1), the variable amplitude oil cylinder (8) drives the power arm (7) to move, the force arm (7) drives the manned platform (13) to move upwards through the connecting arm (12), the driving motor (42) is started through the control panel in the truck head section (1), the driving motor (42) drives the first rotating shaft (43) to rotate, the second rotating shaft (45) rotates after the speed is reduced by the reduction gearbox (44), the second rotating shaft (45) drives the turntable (5) to rotate, the turntable (5) rotates through the supporting block (10) of the supporting rod (9), the supporting block (10) slides in the sliding groove (11), the supporting block (10) and the supporting rod (9) can play a supporting role in supporting the turntable (5), the turntable (5) is enabled to rotate more stably, and the force arm (7, The connecting arm (12) and the manned platform (13) rotate together with the turntable (5), the position of the manned platform (13) can be adjusted, the driving motor (42) generates vibration during working, the shock absorption pad (476), the second shock absorption plate (475), the shock absorption rod (474), the first shock absorption plate (472) and the shock absorption spring (473) can play a role in shock absorption and buffering in sequence, the driving motor (42) is prevented from vibrating too much, when the manned platform (13) inclines, the metal rod (143) rotates around the hinge piece (145), the metal rod (143) is in contact with the metal cylinder (142), a closed loop is formed among the storage battery (146), the metal rod (143), the metal cylinder (142) and the signal transmitter (144), the signal transmitter (144) transmits signals, the signal receiver (34) receives the signals and then controls the buzzer (33) to start working through the controller (32), the buzzer (33) sounds to remind people that the manned platform (13) is in an inclined state.