A motorhome electric expansion structure and a control method for the expansion structure

Abstract

The present application relates to an electric expansion structure of a recreational vehicle and a control method for the expansion structure, and relates to the technical field of recreational vehicle expansion, including a vehicle body, a top plate slidingly provided on the top of the vehicle body, a driving assembly provided between the top plate and the vehicle body, the driving assembly including a lifting rod and a lifting member, the lifting rod having four hingedly provided at the four corners of the top plate, the lifting rod slidingly provided on the vehicle body, the lifting member having two respectively provided at the top plate near the front and rear of the vehicle, each of the lifting members respectively driving the two lifting rods at both ends of the length direction of the top plate, the two lifting members synchronously lifting and driving the top plate to lift and lower as a whole, the two lifting members respectively lifting and driving the top plate to tilt and lift, which has the effect of increasing the space of the recreational vehicle.

Description

Technical Field

[0001] The present application relates to the field of recreational vehicle expansion, and in particular to an electric expansion structure of a recreational vehicle and a control method for the expansion structure. Background Art

[0002] An RV, also known as a "home on wheels", combines the functions of a "house" and a "car", but its attribute is still a car. It is a movable vehicle with the basic facilities necessary for a home.

[0003] As a more practical means of transportation for travel, RVs generally have a small space for activities. People will buy various souvenirs during the trip. The accumulation of a large number of souvenirs has little impact when driving, but it will compress the space for activities when resting, thus affecting the quality of rest in the RV. Summary of the Invention

[0004] In order to increase the space of a recreational vehicle, the present application provides an electric expansion structure for a recreational vehicle.

[0005] The electric expansion structure of a motorhome provided in this application adopts the following technical solution:

[0006] A motorhome electric expansion structure includes a vehicle body, a top plate slidingly provided on the top of the vehicle body, a drive assembly provided between the top plate and the vehicle body, the drive assembly including a lifting rod and a lifting member, the lifting rod having four hingedly provided at the four corners of the top plate, the lifting rod slidingly provided on the vehicle body, two lifting members respectively provided at the top plate near the front and rear of the vehicle, each of the lifting members respectively drives the two lifting rods at both ends of the top plate in the length direction, the two lifting members synchronously lift and drive the top plate to rise and fall as a whole, and the two lifting members lift and drive the top plate to tilt and rise respectively.

[0007] By adopting the above technical solution, the lifting member drives the lifting rods near the front and near the rear of the vehicle to rise and fall synchronously to raise and lower the top plate on the horizontal platform. The lifting member lifts the lifting rods near the front or near the rear of the vehicle separately, and the top plate can be tilted and lifted by the articulation of the lifting rods, thereby expanding only the required expansion area, facilitating the subsequent resetting of the top plate, and expanding the interior space of the RV by lifting the top plate, thereby increasing the space of the RV.

[0008] Optionally, an ultrasonic sensor is installed on the side of the top plate facing the vehicle body, and at least one ultrasonic sensor is provided on the top plate near the front and the rear of the vehicle.

[0009] Optionally, a corrugated ring is provided between the top plate and the vehicle body, and one end of the corrugated ring is fixed to the top plate, and the other end is fixed to the vehicle body.

[0010] Optionally, an embedding groove is provided on the vehicle body, and when the top plate is attached to the vehicle body, the corrugated ring sleeve is folded and stored in the embedding groove.

[0011] Optionally, a support rod is rotatably provided on the top plate near the width direction, the support rod is embedded in the side of the top plate facing the vehicle body, the top plate slides away from the vehicle body, and the support rod rotates and tilts to abut between the top plate and the vehicle body.

[0012] Optionally, a skylight is provided on the top plate, a baffle is slidably provided on the top plate, a power member is provided on the top plate, the power member drives the baffle to slide, and the baffle opens or closes the skylight by sliding.

[0013] Optionally, a driving rod is fixedly provided on the baffle toward the support rod, and the baffle slides to drive the driving rod to drive the support rod to be retracted into the top plate.

[0014] Optionally, a connecting rod is fixed between the two lifting rods near the front of the vehicle and between the two lifting rods near the rear of the vehicle, and the lifting member is arranged on the connecting rod.

[0015] A control method for an electric expansion structure of a recreational vehicle includes a processing terminal installed in the vehicle body, the processing terminal is electrically connected to a control panel, the control panel is set on the center console of the vehicle body cab, the processing terminal is electrically connected to a lifting member, an ultrasonic sensor and a power member, and when the corresponding control button is pressed on the control panel, an electrical signal is transmitted to the processing terminal. After processing the electrical signal, the processing terminal controls the opening and closing of the lifting member and the power member. The ultrasonic sensor detects the distance between the top plate and the object in the vehicle body and feeds back the detection data to the processing terminal. When the distance reaches a preset value of the processing terminal, the processing terminal stops the operation of the lifting member and feeds back the fault details to the control panel.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] 1. The lifting member drives the lifting rods near the front and rear of the vehicle to rise and fall synchronously to raise the roof on the horizontal platform. By lifting the lifting member separately, the lifting rods near the front or rear of the vehicle can be articulated to achieve tilting and lifting of the roof, thereby expanding only the required expansion area and facilitating the subsequent resetting of the roof. By lifting the roof, the interior space of the RV is expanded, thereby increasing the space of the RV.

[0018] 2. The ultrasonic sensor is electrically connected to the processing unit and transmits the detected data to the processing unit in the form of an electrical signal. When the top plate slides too close to objects inside the vehicle, the processing unit controls the top plate to stop sliding, thereby reducing the possibility of the top plate sliding and crushing objects inside the vehicle.

[0019] 3. The setting of the corrugated ring can seal the gap between the roof and the vehicle body when the roof is raised or lowered, preventing rainwater from entering and reducing the probability of the corrugated ring being exposed to the sun for a long time when not in use, thereby reducing the probability of the corrugated ring aging and increasing the service life of the corrugated ring. When the corrugated ring is stored, it can be used to seal the roof and the vehicle body to fill the sealing strip, reducing the probability of rainwater entering the vehicle body through the gap between the roof and the vehicle body;

[0020] 4. The support rod is used to support the roof panel and the vehicle body, and improve the structural strength between the roof panel and the vehicle body when the roof panel slides away from the vehicle body. The support rod can be easily stored by opening and closing the sunroof. When the roof panel needs to be stored, there is no need to manually drive the support rod to store it, and the support of the support rod to the roof panel can be cancelled, thereby reducing the impact of the support rod on the roof panel when it is stored. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0022] Figure 2 It is a schematic diagram of the top plate structure of an embodiment of the present application.

[0023] In the figure, 1. vehicle body; 2. top plate; 3. drive assembly; 31. lifting rod; 32. lifting part; 4. articulated platform; 5. rodless electric cylinder; 6. guide sleeve; 7. connecting rod; 8. ultrasonic sensor; 9. corrugated ring; 10. embedded groove; 11. support rod; 12. skylight; 13. baffle; 14. power part; 15. drive rod. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1-2 The present application is further described with reference to the following specific examples:

[0025] First of all, it should be noted that in the description of this application, if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and other directional words appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of this application; in addition, if the terms "first", "second", "third" and other numerical quantifiers appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", and "connected" appear, they should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an interference fit, a transition fit and other limited connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium; therefore, for ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0026] The present application discloses an electric expansion structure for a motorhome, referring to Figure 1 and Figure 2, including the entire body 1 of the RV, a top plate 2 in the shape of a rectangular parallelepiped is slidingly provided on the top of the body 1, a driving assembly 3 is provided between the top plate 2 and the body 1, and the driving assembly 3 includes four lifting rods 31 respectively hingedly provided at the four corners of the top plate 2 and two lifting members 32 respectively provided at the top plate 2 near the front and rear of the vehicle. In this embodiment, the lifting rods 31 are hingedly provided on the hinge platform 4, and the hinge platform 4 slides on the top plate 2 along the length direction of the top plate 2 through the rodless electric cylinder 5. The lifting rods 31 The sliding is set on the vehicle body 1, and a guide sleeve 6 is set on the vehicle body 1 corresponding to the lifting rod 31. The guide sleeve 6 is fixed in the vehicle body 1 and can guide the sliding of the lifting rod 31, ensuring the stability of the sliding of the lifting rod 31 and guiding the sliding direction of the lifting rod 31. Two of the four lifting rods 31 are slidingly set near the front of the vehicle body 1, and two are slidingly set near the rear of the vehicle body 1. A connecting rod 7 is fixed between the two lifting rods 31 near the front and the two lifting rods 31 near the rear. The two lifting members 32 can lift the top plate 2 upwards and downwards by driving the lifting members 31 at the same end of the top plate 2 in the longitudinal direction.

[0027] Reference Figure 1 and Figure 2 An ultrasonic sensor 8 is installed on the side of the top plate 2 facing the vehicle body 1. At least one ultrasonic sensor 8 is provided on the top plate 2 near the front and rear of the vehicle. In this embodiment, one ultrasonic sensor 8 is provided on the top plate 2 near the front and rear of the vehicle. The ultrasonic sensor 8 is embedded in the top plate 2 and flush with the surface of the top plate 2. The ultrasonic sensor 8 detects the distance between the objects stored in the vehicle body 1 and the top plate 2 through ultrasonic waves. The ultrasonic sensor 8 is electrically connected to the processing unit and transmits the detected data to the processing unit in the form of an electrical signal. When the top plate 2 slides to the object in the vehicle body 1 and is too close to the object, the processing unit controls the top plate 2 to stop sliding, thereby reducing the probability of the top plate 2 sliding and crushing the objects in the vehicle body 1.

[0028] Reference Figure 1 and Figure 2When the top plate 2 is in contact with the vehicle body 1, the corrugated ring sleeve 9 is folded and stored in the embedding groove 10. The embedding groove 10 can accommodate the folded corrugated ring sleeve 9, reducing the probability of the corrugated ring sleeve 9 being exposed to the sun for a long time when not in use, thereby reducing the probability of the corrugated ring sleeve 9 aging and improving the service life of the corrugated ring sleeve 9. When the corrugated ring sleeve 9 is stored, it can be used to seal the top plate 2 and the vehicle body 1 to fill the sealing strip, reducing the probability of rainwater entering the vehicle body 1 from the gap between the top plate 2 and the vehicle body 1.

[0029] Reference Figure 1 and Figure 2 The top plate 2 is provided with a support rod 11 for rotation near the width direction, and the support rod 11 is embedded in the top plate 2 towards the side of the vehicle body 1. In this embodiment, four support rods 11 are provided, and the four support rods 11 are respectively rotatably arranged on both sides near the width direction of the top plate 2, and the two support rods 11 on each side are hinged to one side. When the top plate 2 slides away from the vehicle body 1, the support rod 11 rotates and tilts under the action of gravity to abut between the top plate 2 and the vehicle body 1, and the support rod 11 is used to support and enhance the structural strength between the top plate 2 and the vehicle body 1 when the top plate 2 slides away from the vehicle body 1; a skylight 12 is provided on the top plate 2, and a baffle 13 is slidingly provided on the top plate 2. A power part 14 is provided on the top plate 2. In this embodiment, the power part 14 adopts an electric push cylinder, and the power part 14 drives the baffle 13 to slide. The baffle 13 opens or closes the skylight 12 by sliding, and the brightness inside the vehicle body 1 can be adjusted by opening and closing the window; the baffle When the sunroof 12 is opened, the driving rod 15 drives the supporting rod 11 to be retracted into the top plate 2. When the sunroof 12 is opened, the driving rod 15 drives the supporting rod 11 to be retracted into the top plate 2. When the sunroof 12 is opened, the driving rod 15 drives the supporting rod 11 to be retracted into the top plate 2. When the sunroof 12 is opened, the driving rod 15 drives the supporting rod 11 to be retracted into the top plate 2.

[0030] In other embodiments, the electric expansion structure of the RV also includes an environmental sensing module arranged in the vehicle body, the environmental sensing module is electrically connected to the processing terminal, the environmental sensing module includes a temperature sensor, a humidity sensor and a light sensor, and the environmental sensing module is used to detect the temperature, humidity and light intensity inside the vehicle body, and send the detection information to the processing terminal. The processing terminal adjusts the comfort level in the RV according to the environmental parameters, such as automatically controlling the air conditioning system and the lighting system.

[0031] The environmental sensing module is activated. This module includes temperature, humidity, and light sensors installed at various locations within the RV to monitor internal environmental parameters. The temperature sensor monitors the interior temperature in real time and transmits this data electrically to the processing terminal, which compares the current temperature with the preset comfortable temperature range. The humidity sensor monitors the interior humidity in real time and transmits this data electrically to the processing terminal, which compares it with the preset comfortable humidity range. The light sensor monitors the interior light intensity in real time and transmits this data electrically to the processing terminal, which compares it with the preset comfortable lighting conditions. The processing terminal comprehensively analyzes the temperature, humidity, and light intensity data to determine whether to activate the air conditioning system to adjust the interior temperature and humidity, or activate the lighting system to adjust the interior lighting. If the detection results indicate that the interior temperature is outside the preset range, the processing terminal activates the air conditioning system and adjusts the cooling or heating mode based on the temperature sensor feedback until the interior temperature returns to the preset range. If the test results indicate that the humidity inside the vehicle is too high or too low, the processing terminal activates the air conditioning system's dehumidification or humidification function to adjust the indoor humidity to an appropriate level. If the test results indicate that the interior lighting is insufficient or too strong, the processing terminal activates the lighting system and adjusts the brightness or on / off status of the lamps based on the data provided by the light sensor to ensure moderate lighting inside the vehicle. When the roof is open, the processing terminal also uses the data from the light sensor to determine whether to open the sunroof sunshade or adjust the sunroof opening angle to maintain comfort inside the vehicle.

[0032] In other embodiments, the electric expansion structure of the RV also includes a safety monitoring module arranged in the vehicle body, the safety monitoring module is electrically connected to the processing terminal, the safety monitoring module includes a camera, a smoke alarm and a door lock status detector, the safety monitoring module is used to monitor the safety status of the vehicle and the surrounding environment, and send the monitoring information to the processing terminal, and the processing terminal issues an alarm or takes corresponding safety measures according to the safety status.

[0033] The camera installed in the vehicle body monitors video images of the vehicle interior and surroundings and transmits real-time image information via an electrical connection to a processing terminal. The processing terminal uses an image recognition algorithm to analyze whether any abnormalities have occurred. A smoke alarm installed in the vehicle body detects fire hazards. When the smoke concentration exceeds a preset threshold, the smoke alarm sends an alarm signal via an electrical connection to the processing terminal. Upon receiving the signal, the processing terminal immediately initiates emergency procedures and issues a fire alarm through the control panel. The door lock status detector monitors whether the vehicle doors are locked. If it detects that the door locks have been illegally opened, the door lock status detector sends an alarm signal via an electrical connection to the processing terminal. Upon receiving the signal, the processing terminal issues an anti-theft alarm through the control panel. When the processing terminal receives abnormal image information captured by the camera, it analyzes the abnormal behavior in the image. If a potential threat is confirmed, the processing terminal issues a warning message through the control panel and records the abnormal event. The processing terminal integrates information from the camera, smoke alarm, and door lock status detector to assess the safety status of the vehicle interior and surroundings and, based on the assessment results, determines whether further measures are necessary, such as sending an emergency notification to the vehicle owner via the wireless network.

[0034] In other embodiments, the electric expansion structure of the RV also includes an energy management module arranged in the vehicle body, the energy management module is electrically connected to the processing terminal, the energy management module includes a battery management system, a solar panel controller and a generator control system, the energy management module is used to manage and optimize the energy usage of the RV, and send energy status information to the processing terminal, and the processing terminal schedules energy supply according to the energy status.

[0035] In other embodiments, the electric expansion structure of the RV also includes a user interaction module arranged in the vehicle body, the user interaction module is electrically connected to the processing terminal, the user interaction module includes a touch screen, a voice recognition system and a mobile phone application interface, the user interaction module allows the user to control the various functions of the RV in an intuitive manner, and converts the user's instructions into signals that can be understood by the processing terminal.

[0036] In other embodiments, the RV electric expansion structure also includes a maintenance diagnostic module arranged in the vehicle body, the maintenance diagnostic module is electrically connected to the processing terminal, the maintenance diagnostic module includes a fault self-detection system and a remote service interface, the maintenance diagnostic module is used to regularly check the health status of the RV system and report the diagnostic results to the processing terminal, and the processing terminal reminds the user to perform maintenance or request remote technical support based on the diagnostic results.

[0037] In other embodiments, the electric expansion structure of the RV also includes an entertainment information system arranged in the vehicle body, the entertainment information system is electrically connected to the processing terminal, the entertainment information system includes an audio system, a television receiving device and an Internet access device, the entertainment information system is used to enrich the entertainment life in the RV, and feed back the status of the entertainment information to the processing terminal, and the processing terminal adjusts the entertainment experience according to user preferences.

[0038] A control method for an electric expansion structure of a recreational vehicle includes a processing terminal installed in a vehicle body 1, the processing terminal is electrically connected to a control panel, the control panel is arranged on the center console of the cab of the vehicle body 1, the processing terminal is electrically connected to a lifting member 32, an ultrasonic sensor 8, a power member 14 and a rodless electric cylinder 5 that drives the sliding of the articulated platform 4, and the corresponding control button is pressed on the control panel to transmit an electrical signal to the processing terminal, and the processing terminal controls the opening and closing of the lifting member 32 and the power member 14 after processing the electrical signal. When it is necessary to expand the overall space of the vehicle body 1, the lifting rod 31 is synchronously lifted by driving the two lifting members 32 at the same time, thereby lifting the top plate 2 as a whole. When it is necessary to expand the space in the front area of the vehicle body 1, the lifting member 32 near the front of the vehicle body 1 is driven, and the rodless electric cylinder 5 at the front of the vehicle is driven to adjust the position of the lifting rod 31 hinged to the top plate 2 to avoid jamming. The lifting rod 31 near the front of the vehicle body 1 is driven to slide so that the top plate 2 is lifted near the front area. When it is necessary to expand the space in the rear area of the vehicle body 1 , by driving the lifting member 32 near the rear of the vehicle body 1, and at the same time driving the rodless electric cylinder 5 at the rear of the vehicle to adjust the position of the lifting rod 31 hinged to the top plate 2 to avoid getting stuck, driving the lifting rod 31 near the rear of the vehicle body 1 to slide so that the top plate 2 is lifted near the rear area of the vehicle. When it is necessary to lower the top plate 2 to store the support rod 11, the baffle 13 is driven by the power member 14 to open the sunroof 12, driving the support rod 11 to be stored in the top plate 2 and then the top plate 2 is lowered. After the top plate 2 is lowered, the baffle 13 is controlled by the power member 14 to close the sunroof 12. The ultrasonic sensor 8 detects the distance between the top plate 2 and the object in the vehicle body 1 and feeds back the detection data to the processing terminal. When the distance reaches the preset value of the processing terminal, the processing terminal stops the operation of the lifting member 32 and feeds back the fault details to the control panel. In this embodiment, a warning light is set on the control panel. When the ultrasonic sensor 8 detects that the distance between the top plate 2 and the object in the vehicle body 1 reaches the preset value, the processing terminal will light up the warning light to remind the driver to troubleshoot the fault.

[0039] The implementation principle of the embodiment of the present application is as follows: when it is necessary to expand the overall space of the vehicle body 1, the two lifting members 32 are activated simultaneously to synchronously lift the lifting rod 31. During this period, the corrugated ring 9 is stretched, and the support rod 11 rotates under the action of gravity, lifting the top plate 2 to a height slightly higher than the preset value and then lowering it to the preset value. The support rod 11 is pressed tightly between the top plate 2 and the vehicle body 1 to complete the overall expansion of the vehicle body 1; when it is necessary to expand the space in the front area of the vehicle body 1, the lifting member 32 near the front of the vehicle body 1 is activated and the vehicle body 1 is driven to move upwards. The rodless electric cylinder 5 at the head adjusts the position of the lifting rod 31 hinged to the top plate 2, driving the lifting rod 31 close to the front of the vehicle body 1 to slide and lift the top plate 2 close to the front area. During this period, the corrugated ring 9 is stretched, and the support rod 11 rotates under the action of gravity, lifting the top plate 2 to a height slightly higher than the preset value and then lowering it to the preset value. The support rod 11 is pressed between the top plate 2 and the vehicle body 1 to complete the expansion of the front area of the vehicle body 1; when it is necessary to expand the space in the rear area of the vehicle body 1, the lifting part close to the rear of the vehicle body 1 is activated. 32, and at the same time drive the rodless electric cylinder 5 at the rear of the vehicle to adjust the position of the lifting rod 31 hinged to the top plate 2, drive the lifting rod 31 near the rear of the vehicle body 1 to slide so that the top plate 2 is lifted near the rear area of the vehicle, during which the corrugated ring 9 is stretched, and the support rod 11 rotates under the action of gravity, lifting the top plate 2 to a height slightly higher than the preset value and then lowering it to the preset value, pressing the support rod 11 between the top plate 2 and the vehicle body 1, completing the expansion of the rear area of the vehicle body 1; when it is necessary to lower the top plate 2 to store the support rod 11, the lifting member 3 is used to lift the top plate 2 to the rear area of the vehicle body 1. The roof panel 2 is slightly lifted and the power member 14 is activated to drive the baffle 13 to open the sunroof 12, which drives the support rod 11 to be stored in the roof panel 2 before the roof panel 2 is lowered. After the roof panel 2 is lowered, the power member 14 controls the baffle 13 to close the sunroof 12. When the roof panel 2 is lowered for too long, the ultrasonic sensor 8 detects the distance between the roof panel 2 and the items in the vehicle body 1 in real time. When the distance reaches a preset value, the roof panel 2 stops descending and warns the driver. After the driver eliminates the fault, the roof panel 2 continues to descend until it is reset and stored.

[0040] It should be noted that the above embodiments are only used to illustrate the present application and are not intended to limit the technical solutions described in the present application. Although this specification has described the present application in detail with reference to the above embodiments, ordinary technicians in this field should understand that technicians in the relevant technical field can still modify or replace the present application with equivalents, and all technical solutions and improvements that do not depart from the spirit and scope of the present application should be included in the scope of the claims of the present application.

Claims

1. An electric expansion structure for a recreational vehicle, comprising a vehicle body (1), characterized in that: The top of the vehicle body (1) is slidably provided with a top plate (2), a driving assembly (3) is provided between the top plate (2) and the vehicle body (1), the driving assembly (3) comprises a lifting rod (31) and a lifting member (32), the lifting rod (31) has four hingedly provided at the four corners of the top plate (2), the lifting rod (31) is slidably provided on the vehicle body (1), the lifting member (32) has two respectively provided at the top plate (2) near the front and rear of the vehicle, each lifting member (32) The components (32) respectively drive the two lifting rods (31) at both ends of the top plate (2) in the length direction, the two lifting components (32) synchronously lift and drive the top plate (2) to lift and lower as a whole, and the two lifting components (32) respectively lift and drive the top plate (2) to tilt and lift; the top plate (2) is provided with a support rod (11) near the width direction, and the support rod (11) is embedded in the side of the top plate (2) facing the vehicle body (1). When the top plate (2) slides away from the vehicle body (1), the support rod (11) The top plate (2) is rotated and tilted to abut against the vehicle body (1); a skylight (12) is provided on the top plate (2); a baffle (13) is provided on the top plate (2) for sliding movement; a power member (14) is provided on the top plate (2); the power member (14) drives the baffle (13) to slide; the baffle (13) opens or closes the skylight (12) by sliding; the skylight (12) is a skylight (12) with glass installed; the baffle (13) is fixed with a driving mechanism toward the support rod (11) The movable rod (15) and the baffle (13) slide to drive the driving rod (15) to drive the support rod (11) to be stored in the top plate (2); a corrugated ring sleeve (9) is provided between the top plate (2) and the vehicle body (1), one end of the corrugated ring sleeve (9) is fixed on the top plate (2), and the other end is fixed on the vehicle body (1); an embedding groove (10) is provided on the vehicle body (1), and when the top plate (2) is attached to the vehicle body (1), the corrugated ring sleeve (9) is folded and stored in the embedding groove (10).

2. The electric expansion structure of a recreational vehicle according to claim 1, characterized in that: An ultrasonic sensor (8) is installed on the side of the top plate (2) facing the vehicle body (1), and at least one ultrasonic sensor (8) is provided on the top plate (2) near the front and rear of the vehicle.

3. The electric expansion structure of a recreational vehicle according to claim 2, characterized in that: A connecting rod (7) is fixedly provided between the two lifting rods (31) near the front of the vehicle and between the two lifting rods (31) near the rear of the vehicle, and a lifting member (32) is provided on the connecting rod (7).

4. A control method for an electric expansion structure of a recreational vehicle, which is used for the electric expansion structure of a recreational vehicle according to claim 3, characterized in that: The invention comprises a processing terminal installed in a vehicle body (1), the processing terminal being electrically connected to a control panel, the control panel being arranged on a center console of a cab of the vehicle body (1), the processing terminal being electrically connected to a lifting member (32), an ultrasonic sensor (8) and a power member (14), and pressing a corresponding control button on the control panel to transmit an electric signal to the processing terminal, which controls the opening and closing of the lifting member (32) and the power member (14) after processing the electric signal, the ultrasonic sensor (8) detecting the distance between the top plate (2) and an object in the vehicle body (1) and feeding back the detection data to the processing terminal, and when the distance reaches a preset value of the processing terminal, the processing terminal stops the operation of the lifting member (32) and feeds back the fault details to the control panel.

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