Expansion mechanism capable of obliquely expanding, motor home and expansion control method

Abstract

The invention discloses an expanding mechanism capable of obliquely expanding, a motor home and an expanding control method, and relates to the technical field of expanding mechanisms and motor home expanding. The expanding mechanism is provided with a gear and a rack which are meshed, the thicknesses of the front end and the rear end of the rack are different, and the thicknesses of the rack are gradually increased or decreased from front to back; the motor drives the transmission square tube and the gear mounting shaft to rotate and drives the gear at the tail end to rotate, so that the racks and the expansion rods are driven to extend outwards or retract inwards, and the inclination angles of the expansion rods are changed in the extending or retracting process. The extension mechanism is applied to the motor home, a corresponding motor home extension control method is set, a certain downward inclination angle can be automatically generated when an extension cabin of the motor home expands outwards, and the inclination angle can be adaptively adjusted according to actual conditions so as to adapt to different application scenes.

Description

Technical Field

[0001] The present invention relates to the technical fields of an expansion mechanism and a motorhome expansion technology, and particularly relates to an expandable mechanism that can be tilted, a motorhome, and an expansion control method. Background Art

[0002] The statements in this part only provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] With the continuous improvement of people's requirements for the motorhome travel experience, obtaining a more spacious and comfortable living space within the limited body size of a motorhome is one of the current mainstream demands. Currently, expanding the interior space of a motorhome outward has become the main means to solve this problem. On this basis, a bottom expansion mechanism suitable for motorhomes has emerged. Currently, there are already various expansion mechanisms and motorhome designs equipped with this expansion mechanism in the prior art. However, most of the expansion mechanisms and the expanded parts of the motorhomes are parallel expansion designs, and there are certain problems with this structural design:

[0004] (1) High risk of rainwater accumulation. When encountering rainy weather, since most of the expanded parts of the motorhome are expanded in parallel, there is no inclined angle in the expanded part to guide the rainwater to flow out. The rainwater is easily accumulated on the top of the expanded part of the motorhome to form ponding, and the ponding will seep into the vehicle through the connection gap or poor sealing between the expanded part and the motorhome body, resulting in the vehicle interior being soaked by rainwater and damaging the furniture, electrical appliances, and decorative materials inside the vehicle. Although there is also a way in the prior art to set the top of the expanded part to an inclined state to avoid rainwater infiltration, however, if the expanded part is set to a fixed inclined top, due to the mismatch in shape and structure between the inclined top and the parallel top of the existing motorhome body, it is not convenient for expansion and is likely to affect the sealing performance of the expansion. And if the angle of the expanded top is set to be adjustable separately, the cost of the entire expansion design is relatively high.

[0005] (2) Inconvenient drainage after cleaning. When cleaning the expanded part or when the expanded part is flooded inside, since the expanded part of the motorhome is expanded in parallel, the sewage in the expanded part is difficult to drain naturally. If the ponding cannot be cleared in time, it will cause dirt to remain on the surface of the expanded part, affecting the use and aesthetics. Moreover, long-term ponding may also breed bacteria, molds, etc., which have an adverse impact on the air quality inside the vehicle and the health of passengers.

[0006] (3) The angle of the expanded part cannot be effectively adjusted, resulting in certain window reflection or insufficient lighting, affecting the lighting effect inside the motorhome; when encountering strong winds, since the overall inclined angle of the expanded part cannot be adjusted to disperse the wind force, the wind pressure received by the entire expansion mechanism is relatively large, making the expanded part prone to shaking, and may even damage the connection part, posing a threat to the overall structural safety of the motorhome. Summary of the Invention

[0007] To address the deficiencies of the above-mentioned existing technologies, the present invention provides a tiltable expansion mechanism, a recreational vehicle, and an expansion control method. Through mechanical structure design, the expansion is realized by tilting outwards, and then the tiltable expansion mechanism is applied to the expansion of the recreational vehicle, enabling the overall expansion cabin of the recreational vehicle to automatically generate a downward tilt angle when expanding outwards, and the tilt angle can be adaptively adjusted according to specific circumstances, so that the expansion cabin of the recreational vehicle has the characteristics of preventing rainwater backflow, facilitating cleaning and drainage, optimizing the viewing angle, reducing reflection interference, enhancing wind resistance, etc., and solving the problems existing in the parallel expansion method.

[0008] In a first aspect, the present invention provides a tiltable expansion mechanism.

[0009] A tiltable expansion mechanism includes a support component, a drive component, and an expansion component; the support component includes two parallel hollow support rods, the expansion component includes two expansion rods respectively arranged inside the two hollow support rods, a rack is fixedly installed at the bottom of the expansion rod, a first opening matching the rack is provided at the bottom of the support rod, and the rack extends out of the support rod through the first opening; wherein, the thicknesses of the front and rear ends of the rack are different and the thickness of the rack increases or decreases from front to back;

[0010] The drive component includes a motor and a transmission square tube, the motor is fixedly arranged on the transmission square tube, gear mounting shafts are provided on both sides of the transmission square tube, gears are fixedly installed on the gear mounting shafts, and the gears mesh with the rack; the motor drives the transmission square tube and the gear mounting shafts to rotate, driving the gears at the ends to rotate, thereby driving the rack and the expansion rod to expand outwards or retract inwards, and changing the tilt angle of the expansion rod during the expansion or retraction process.

[0011] In a further technical solution, fixing plates are fixedly installed on both sides of the ends of the two support rods, bearings are provided on the inner side of each fixing plate, the bearings are fixed on the fixing plates through shaft end retaining rings, and a second opening is provided at the bottom of the end of the support rod, and the top of the bearing supports the expansion rod inside the support rod through the second opening; the end of the gear mounting shaft is rotatably connected to the fixing plate.

[0012] In a further technical solution, the expansion component further includes a connecting rod vertically connecting the ends of the two expansion rods.

[0013] In a second aspect, the present invention provides a tiltable expansion recreational vehicle.

[0014] A tiltable expansion recreational vehicle includes a recreational vehicle body, a main compartment is installed on the recreational vehicle body, an expansion cabin is arranged inside the main compartment, a tiltable expansion mechanism proposed in the first aspect is provided at the bottom of the main compartment, the expansion cabin is matched with the expansion mechanism, and the expansion cabin expands out or retracts inside the main compartment as the expansion mechanism expands out or retracts, and the overall tilt angle of the expansion cabin changes during the expansion or retraction process.

[0015] For a further technical solution, the support rod in the expansion mechanism is fixedly installed at the bottom of the RV body. The opening surface of the expansion compartment is hermetically connected to the main compartment, and the outer wall of the expansion compartment is fixedly connected to the connecting rod in the expansion mechanism on the same vertical plane.

[0016] For a further technical solution, D-shaped rubber sealing rings are provided on both the inner and outer sides of the contact part between the opening surface of the expansion compartment and the main compartment, so that the opening surface of the expansion compartment is hermetically connected to the main compartment.

[0017] For a further technical solution, a plurality of support feet with independently adjustable heights are provided at the bottom outside the expansion compartment, and the support feet are used to support the entire expansion compartment;

[0018] Among them, the support foot includes an outer foot tube and an inner foot tube as the main body. The inner foot tube is sleeved inside the outer foot tube, and a foot pad is fixed at the lower end of the inner foot tube; a driving motor is also provided on the support foot, and the driving motor is used to drive the up and down movement of the inner foot tube in the outer foot tube to adjust the length of the entire foot.

[0019] For a further technical solution, a controller, a control panel, a motor driver, and a support foot controller are provided inside the main compartment. An angle sensor, a light sensor, and a wind speed sensor are provided on the expansion compartment. The various sensors, the motor driver, the support foot controller, and the control panel are all electrically connected to the controller. The motor driver is electrically connected to the motor in the expansion mechanism, and the support foot controller is electrically connected to the driving motor in the support foot;

[0020] The control panel is used to generate control instructions and transmit them to the controller to start or stop the operation of the motor;

[0021] The motor driver is used to control the rotation speed and rotation time of the motor according to the motor drive instruction to control the moving distance of the rack, and further control the tilting angle of the expansion compartment;

[0022] The support foot controller is used to control the height adjustment of the electric support foot according to the motor drive instruction;

[0023] The angle sensor is used to monitor the tilting angle of the expansion compartment in real time and feed back the monitoring data to the controller;

[0024] The light sensor is used to monitor the light angle and intensity in real time and feed back the monitoring data to the controller;

[0025] The wind speed sensor is used to monitor the wind speed and wind direction angle in real time and feed back the monitoring data to the controller;

[0026] The controller is used to calculate the optimal tilt angle and the height of the support leg through a preset relationship model according to the monitored tilt angle, light angle and intensity, wind speed and wind direction angle of the expansion cabin, and automatically generate a motor drive command.

[0027] In a third aspect, the present invention further provides an expansion control method for a tiltable expansion RV.

[0028] An expansion control method for a tiltable expansion RV, which is used to control the tiltable expansion RV proposed in the second aspect. The method includes:

[0029] Generate a control command using the control panel. The controller controls the operation of the motor in the expansion mechanism according to the control command, drives the movement of the rack in the expansion mechanism, drives the expansion rod and the expansion cabin to expand outwards or retract inwards, and changes the tilt angle of the expansion cabin during the expansion or retraction process.

[0030] A further technical solution further includes:

[0031] Utilize the angle sensor, light sensor, and wind speed sensor installed on the expansion cabin to monitor the tilt angle, light angle and intensity, wind speed and wind direction angle of the expansion cabin in real time, and feedback the monitored data to the controller;

[0032] The controller processes the data according to the real-time monitored data, calculates the optimal tilt angle and the height of the support leg through a preset relationship model, and automatically generates a motor drive command;

[0033] According to the motor drive command, drive the motor to adjust the expansion or retraction of the expansion cabin to achieve the optimal tilt angle of the expansion cabin.

[0034] The above one or more technical solutions have the following beneficial effects:

[0035] 1. The present invention provides a tiltable expansion mechanism, an RV and an expansion control method. Through the mechanical structure design, the tiltable expansion is realized, and then the tiltable expansion mechanism is applied to the RV expansion, so that the whole expansion cabin of the RV can automatically generate a downward tilt angle when expanding outwards, and the tilt angle can be adaptively adjusted according to the specific situation, so that the RV expansion cabin has the characteristics of preventing rainwater backflow, facilitating cleaning and drainage, optimizing the viewing angle, reducing reflection interference, enhancing the wind resistance performance, etc., and solves the problems existing in the parallel expansion method.

[0036] 2. In the tilt-expandable RV proposed by the present invention, a variety of sensors and controllers are provided to analyze and construct a relationship model between the optimal tilt angle and light and wind pressure. A variety of sensors are used to sense the current environmental information of the RV, and then the optimal tilt angle is calculated according to this environmental information in combination with a preset model, so as to adjust the tilt angle of the RV expansion module, achieve tilting at the optimal angle, optimize the lighting conditions in the RV expansion module, reduce window reflection, achieve the maximum natural lighting efficiency, and at the same time optimize the wind resistance situation, reduce the wind resistance system, and enhance the structural stability.

[0037] Advantages of additional aspects of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings forming a part of this specification are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0039] Figure 1 It is a schematic diagram of the overall expansion mechanism in an embodiment of the present invention;

[0040] Figure 2 It is a side view of the expansion mechanism in an embodiment of the present invention;

[0041] Figure 3 It is a schematic diagram of the rack in the expansion mechanism in an embodiment of the present invention;

[0042] Figure 4 It is a top view of the expansion mechanism in an embodiment of the present invention;

[0043] Figure 5 It is a schematic diagram of the overall RV equipped with an expansion mechanism in an embodiment of the present invention;

[0044] Figure 6 It is a side view of the RV equipped with an expansion mechanism in an embodiment of the present invention;

[0045] Figure 7 It is a schematic diagram of the recovery and extension of the expansion mechanism of the RV in an embodiment of the present invention; wherein, (a) is the recovery state and (b) is the extended state;

[0046] Figure 8 It is a schematic diagram of a rubber ring arranged at the connection between the RV expansion module and the main body compartment in an embodiment of the present invention;

[0047] Figure 9 It is a schematic diagram of the support leg in an embodiment of the present invention.

[0048] Among them, 1. Support part; 2. Driving part; 3. Expansion part; 1-1. Support rod; 1-2. First opening; 1-3. Second opening; 1-4. Fixed plate; 1-5. Bearing; 2-1. Motor; 2-2. Transmission square tube; 2-3. Gear mounting shaft; 2-4. Gear; 3-1. Expansion rod; 3-2. Connecting rod; 3-3. Rack; 4. Expansion cabin; 5. Support leg; 5-1. Inner tube of the leg; 5-2. Outer tube of the leg; 5-3. Driving motor; 5-4. Foot pad; 6. D-shaped rubber sealing ring. Detailed implementation mode

[0049] It should be noted that the following detailed description is exemplary only for describing the specific implementation mode, aiming to provide further explanation of the present invention and is not intended to limit the exemplary implementation mode according to the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. In addition, it should also be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0050] Embodiment 1

[0051] This embodiment provides an expandable mechanism that can be tilted and expanded, including a support part 1, a driving part 2, and an expansion part 3. Among them, the expansion part 3 can be used for space expansion, and this part is made of lightweight and strong materials (such as aluminum alloy or composite materials) to reduce weight and ensure strength; the driving part 2 is the power source of the expansion mechanism, which can be realized by electric drive and / or hydraulic drive. Among them, the electric drive includes parts such as a motor, a gear, and a transmission shaft, and the expansion and retraction of the expansion part are realized by controlling the forward and reverse rotation of the motor. When facing a larger mechanism, hydraulic drive can be adopted by setting parts such as an oil pump and a hydraulic cylinder to provide stronger power; the support part 1 plays a role in stabilizing and bearing after the expansion part is extended.

[0052] The expandable mechanism that can be tilted and expanded proposed in this embodiment, as Figure 1 shown, includes a support part 1, a driving part 2, and an expansion part 3. As Figure 2 shown, the support part 1 includes two parallel hollow support rods 1-1, the expansion part 3 includes two expansion rods 3-1 respectively arranged inside the two hollow support rods, and a connecting rod 3-2 vertically connecting the ends of the two expansion rods 3-1. A rack 3-3 is fixedly installed at the bottom of the expansion rod 3-1, and a first opening 1-2 is opened at the bottom of the support rod 1-1, and the first opening 1-2 matches the rack 3-3. The rack 3-3 arranged at the bottom of the expansion rod 3-1 can protrude out of the support rod 1-1 through the first opening 1-2. As Figure 4As shown in the figure, the driving part 2 includes a motor 2-1 and a transmission square pipe 2-2. The motor 2-1 is fixedly arranged on the transmission square pipe 2-2. Gear mounting shafts 2-3 are arranged on both sides of the transmission square pipe 2-2. Gears 2-4 are fixedly mounted on the gear mounting shafts 2-3. The gears 2-4 are engaged with the racks 3-3. By driving the transmission square pipe 2-2 and the gear mounting shafts 2-3 to rotate through the motor 2-1, the gears 2-4 at the ends are driven to rotate, thereby driving the racks 3-3 and the expansion rods 3-1 to expand outwards or retract inwards.

[0053] Further, as Figure 4 shown in the figure, in this embodiment, the driving mode of the expansion mechanism adopts motor drive, and its power transmission path includes the motor 2-1, the transmission square pipe 2-2, the gear mounting shafts 2-3, the gears 2-4, the racks 3-3, etc. Specifically, the motor 2-1 is placed between the two expansion rods 3-1. Both sides of the motor 2-1 are connected to the transmission square pipe 2-2 through pin shafts. The transmission square pipe 2-2 is connected to the gear mounting shafts 2-3 through pin shafts. Key grooves are provided on the gear mounting shafts 2-3, and the gears 2-4 are connected to the key grooves through flat keys. When the motor works, it can drive the transmission square pipes on both sides to rotate, and then drive the connected gears to rotate, so that the two expansion rods move synchronously.

[0054] To enable the expansion mechanism to be tilted during the expansion process, in this embodiment, the thicknesses of the front and rear ends of the above-mentioned rack 3-3 are different and gradually increase or decrease from front to back. As Figure 3 shown in the figure, by adjusting the thicknesses of both ends of the rack 3-3, when the gear 2-4 drives the rack 3-3 and the expansion rod 3-1 to expand outwards or retract inwards, the inclination angle of the expansion rod will change during the expansion or retraction process, so that a gap is generated between the expanded part and the support part when the expansion part is in the expanded state. In this way, a certain inclination angle is automatically generated when the expansion mechanism expands, and the longer the expansion distance, the larger the generated gap. When it is fully expanded, the maximum achievable inclination angle can be reached.

[0055] As Figure 2 shown in the figure, fixed plates 1-4 are fixedly arranged on both sides of the ends of the two support rods 1-1, and the two fixed plates can be fixedly connected through a fixed rod. Bearings are arranged on the inner sides of each fixed plate 1-4. The bearings 1-5 are fixed on the fixed plates through shaft end retaining rings. Second openings 1-3 are provided at the bottoms of the ends of the support rods 1-1. The tops of the bearings 1-5 support the expansion rods 3-1 inside the support rods 1-1 through the second openings 1-3, thereby playing a role in supporting and limiting the support rods. Taking the example that the thickness of the rack gradually decreases from front to back, as the motor drives the expansion part to continuously expand outwards, the front end of the expansion mechanism tilts downwards and the rear end tilts upwards. At this time, the bearings can also play the role of a lever.

[0056] Embodiment 2

[0057] This embodiment provides a motorhome with tiltable expansion, asFigure 5 As shown, it includes a recreational vehicle body, on which a main compartment is installed. An expansion compartment 4 is arranged inside the main compartment. At the bottom of the main compartment, there is an expansion mechanism that can be tilted and expanded proposed in the first embodiment. The expansion compartment 4 cooperates with the expansion mechanism. The expansion compartment 4 is extended or retracted in the main compartment as the expansion part of the expansion mechanism is extended or retracted, and the overall tilt angle of the expansion compartment is changed during the extension or retraction process. For example, Figure 7 as shown.

[0058] For example, Figure 6 as shown, the support rod 1-1 in the expansion mechanism is fixedly installed at the bottom of the recreational vehicle body. The opening surface of the expansion compartment 4 is hermetically connected to the main compartment. The outer wall of the expansion compartment is fixedly connected to the connecting rod 3-2 in the expansion mechanism on the same vertical plane, so that the expansion compartment can move as the expansion part in the expansion mechanism moves, and the whole expansion compartment 4 is always parallel to the expansion rod 3-1 in the expansion part, so that the whole expansion compartment can be tilted during the extension or retraction process.

[0059] For example, Figure 7 as shown in (a) of , when the expansion mechanism is in the retracted state, the expansion compartment is located inside the main compartment. At this time, the outer wall of the expansion compartment is perpendicular to the main compartment, that is, it is 90°; as Figure 7 shown in (b) of , when the expansion mechanism is in the extended state, the expansion compartment is extended synchronously. Due to the different thicknesses of the front and rear ends of the rack in the expansion mechanism, the gap between the expansion part and the support part becomes larger. Under the action of the gravity of the expansion compartment, the front part of the moving end of the expansion mechanism moves downward, so that the whole expansion compartment tilts forward and downward. In this embodiment, the maximum tilt angle is set to 90.6°.

[0060] Based on the above design, the relationship between the tilt angle θ of the expansion compartment and the expansion distance L can be expressed as:

[0061] h = L·θ / A;

[0062] In the above formula, h is the distance that the end of the expansion compartment deviates downward compared with the retracted state, and the unit is mm; L is the expansion distance, and the unit is mm; θ is the tilt angle, and the unit is degree; A is a set value, which can be determined or set according to the actual situation.

[0063] In this embodiment, A = 30 in the above formula. When the expansion compartment is fully extended in the above manner, the end of the expansion part deviates downward by 20 mm compared with the retracted state, and the whole expansion compartment forms a downward inclination angle. At this time, the inclination angle reaches the maximum tilt angle of 0.6°. Moreover, when the expansion compartment is fully extended, the use space of the expansion compartment is maximally utilized, and the use space of the expansion compartment is not compressed at this time.

[0064] By setting the expansion mechanism and the expansion cabin in the RV as described above, with the expansion of the expansion cabin, the internal usable space of the RV can be increased, and the expanded part of the expansion cabin will tilt at a certain angle during expansion, avoiding the drawbacks of the traditional parallel expansion design of RVs.

[0065] As Figure 8 shown, D-shaped rubber sealing rings 6 are added to both the inner and outer sides of the contact part between the opening surface of the expansion cabin and the main body carriage to achieve the sealed connection of the two parts. In the retracted state of the expansion cabin, it can effectively prevent rainwater from invading the expansion cabin; in the extended state of the expansion cabin, due to the certain downward tilt angle of the expansion cabin, by setting the D-shaped rubber sealing rings on both the inner and outer sides, it can not only effectively prevent rainwater from invading the expansion cabin, but also divert the rainwater to the outside of the expansion cabin to prevent rainwater from accumulating on the top of the expansion cabin.

[0066] As a real-time method, considering the strength problem of the expansion mechanism, especially the support part, in this embodiment, the overall parts of the expansion mechanism are manufactured using low-alloy high-strength structural steel - Q355B, whose yield strength is 355 MPa, enabling it to withstand large external forces without obvious plastic deformation, thereby effectively improving the structural strength of the support part.

[0067] Furthermore, considering the load-bearing problem when the expansion cabin is fully expanded, multiple support feet 5 with independently adjustable heights are added to the outer bottom of the expansion cabin to support the entire expansion cabin and relieve the stress on the RV chassis and the support part of the expansion mechanism. As Figure 9 shown, the support foot 5 includes a footrest outer tube 5-2 as the main body and a footrest inner tube 5-1. The footrest inner tube 5-1 is sleeved inside the footrest outer tube 5-2, and a foot pad 5-4 is fixed at the lower end of the footrest inner tube 5-1, which can facilitate the contact between the support foot and the ground and play a supporting role. Among them, to achieve the autonomous adjustment of the angle of the expansion cabin and make the tilt angle of the expansion cabin match the external environment, this embodiment also adds an electric adjustment device to the support foot 5 of the expansion cabin. Specifically, a drive motor 5-3 is also provided in the support foot 5, and the drive motor 5-3 is used to drive the footrest inner tube 5-1 to move up and down inside the footrest outer tube 5-2, thereby adjusting the length (or height) of the entire footrest to adapt to different application scenarios.

[0068] Through the above setting of the support feet, the expansion cabin can maintain horizontal stability on both sides when it is fully extended. When the expansion cabin is fully extended in the parked state, the support feet and the tires of the RV together form a stable support system, enhancing the overall stability of the RV and improving the wind resistance. In addition, when the expansion cabin is fully extended to the lowest point, the expansion cabin can be raised by adjusting the electric support feet on both sides to achieve the autonomous adjustment of the expansion angle and the ground clearance of the expansion cabin.

[0069] Furthermore, in the tiltable and expandable RV proposed in this embodiment, a controller, a control panel (or remote control), a motor driver, and a support leg controller are provided inside the main compartment. An angle sensor, a light sensor, a wind speed sensor, etc. are provided on the expansion compartment. The various sensors, the motor driver, the support leg controller, and the control panel (or remote control) are all electrically connected to the controller provided inside. The motor driver is electrically connected to the motor in the expansion mechanism to drive the motor to operate. The support leg controller is electrically connected to the drive motor on the support leg to drive the drive motor to operate.

[0070] In this embodiment, the control panel uses a touch display screen, which can interact with the user, generate control instructions according to the user's touch, and transmit them to the controller. The motor operation is started and stopped by touch, and the extension and retraction of the expansion compartment and the tilt angle of the expansion compartment are adjusted; the motor driver is used to control the rotation speed and rotation time of the motor, so as to accurately control the moving distance of the rack to control the tilt angle of the expansion compartment; the support leg controller is used to control the height adjustment of the electric support legs to ensure the stability of the expansion compartment in the tilted state; the angle sensor is used to monitor the tilt angle of the expansion compartment in real time and feed back the monitoring data to the controller; the light sensor is used to monitor the light angle and intensity in real time and feed back the monitoring data to the controller; the wind speed sensor is used to monitor the wind speed and wind direction angle in real time and feed back the monitoring data to the controller; the controller is used to calculate the optimal tilt angle and support leg height through a preset relationship model according to the monitored tilt angle, light angle and intensity, wind speed and wind direction angle of the expansion compartment, and automatically generate a motor drive instruction to control the tilt angle of the expansion compartment, so that it can adapt to different scenarios, avoid the problem of window reflection and insufficient lighting, and improve the strength of the overall structure of the RV against strong winds.

[0071] Specifically, during the above adjustment process, a pre-constructed relationship model of the optimal tilt angle with light and wind pressure is loaded in the controller. According to this relationship model, combined with the currently real-time perceived and monitored light angle and intensity, wind speed and wind direction angle, the optimal tilt angle θ of the expansion compartment at the current moment is dynamically calculated and determined. opt According to this optimal tilt angle, the current tilt angle is adjusted to reach the optimal, realizing the optimization of the lighting in the RV, reducing window reflection, achieving the maximum natural lighting efficiency, and at the same time realizing anti-wind optimization, reducing the wind resistance system, and enhancing the stability of the structure.

[0072] Among them, the relationship model of the optimal tilt angle with light and wind pressure is the weighted sum of the light optimization angle θ light and the anti-wind optimization angle θ wind This relationship model can be expressed as:

[0073]

[0074] Among them, Wlight and W wind respectively represent the weight coefficients of the light and wind resistance optimization angles.

[0075] Furthermore, the weight coefficients of the light and wind resistance optimization angles can be set values. For example, set W light = 0.5 and W wind = 0.5.

[0076] As another real-time method, set the weight coefficient adjustment factors α and β related to the actual environment. Thus, the weight coefficient adjustment factors can be calculated according to the actual light intensity and actual wind speed, and these factors are used to further adjust the weights of the light and wind resistance optimization scheduling to adapt to the current environment. Specifically, the weight coefficient adjustment factors include a light influence factor and a wind speed influence factor. The calculation formula for the light influence factor is:

[0077]

[0078] where the clamp function is a function that limits a certain value within a certain interval, and I m is the light threshold. That is, when I ≥ I m , α = 1, and at this time, it is completely dominated by light; when I ≤ I m , α = 0, and at this time, there is no light dominance.

[0079] The calculation formula for the wind speed influence factor is:

[0080]

[0081] where v m is the wind speed threshold. That is, when v ≥ v m , β = 1, and at this time, it is completely dominated by wind resistance; when v ≤ v m , β = 0, and at this time, there is no wind resistance dominance.

[0082] Furthermore, the calculation formula for the weight coefficients of the above light and wind resistance optimization angles is:

[0083] W light = W0 + (1 - 2W0)·α·(1 - β);

[0084] W wind = 1 - W light ;

[0085] where W0 represents the basic weight.

[0086] Through the above settings, the weight coefficients of the light and wind resistance optimization angles can be adjusted according to the actual situation.

[0087] In this embodiment, let I m = 1000 lux and v m= 10 m / s, W0 = 0.3, then when it is daytime, i.e., the light intensity I = 1000 lux and the wind speed < 10 m / s, take W light = 0.7, W wind = 0.3, and when it is night, i.e., the light intensity I < 1000 lux and it is strong wind, i.e., the wind speed v > 10 m / s, take W light = 0.3, W wind = 0.7.

[0088] In addition, the above relationship model has certain constraint conditions, which are:

[0089] (1) Physical limit constraint: θ opt ∈[0°, 0.6°]; this constraint refers to the maximum inclination angle according to the mechanism design;

[0090] (2) Stability compensation constraint: Δθ opt / Δt ≤ 0.1° / s; that is, the change rate of the inclination angle is limited to avoid structural impact caused by sudden angle changes.

[0091] Among them, in the calculation process of the above light optimization angle θ light , first calculate the light angle as 90° - α + β, where α represents the solar altitude angle (which can be determined according to the light angle), and β represents the angle between the light direction and the front of the expansion module. To achieve the best lighting angle and make the sunlight vertically incident on the expansion module window, when the sunlight is incident from the front, β = 0°, then the light optimization angle can be determined as: θ light = 90° - α. Further, considering the influence of the light intensity, a sunshade strategy is introduced, that is, when the light intensity I > the preset maximum threshold I max (set as 60000 lux), then optimize the calculation formula of the above light optimization angle, which is:

[0092] θ light = 90° - α + Δθ;

[0093] Δθ = arctan(I / I max ) × 10°;

[0094] Reduce direct strong light through the above angle offset.

[0095] The calculation formula of the above wind resistance optimization angle θ wind is:

[0096] θ wind = γ - δ;

[0097] In the above formula, γ represents the angle between the real-time wind direction and the longitudinal direction of the expansion module, δ represents the optimization offset, δ = arctan(v 2 ) × 0.5, so as to increase the offset in strong wind to reduce the windward area, v represents the wind speed; θwubd Denotes the wind resistance optimization angle, at which the wind resistance can be minimized.

[0098] In this embodiment, an angle sensor is used to obtain the current tilt angle θ in real time currebt , a light sensor is used to obtain the real-time solar altitude angle α and light intensity I, a wind speed sensor is used to obtain the real-time wind speed v and wind direction angle γ, and the current optimal tilt angle θ is dynamically calculated according to the above model opt ; According to the calculated optimal tilt angle θ opt for extended control. When θ opt ≠θ current , the motor of the extension mechanism is driven to adjust the angle to reach the optimal tilt angle, and at the same time, the height of the support leg is synchronously adjusted to ensure overall stability after tilting. The height compensation formula for the support leg is: Δh = L·sin(θ opt - θ current ), where L is the extension distance. Through the above method, the functional requirements and structural safety can be automatically balanced in strong light or strong wind scenarios.

[0099] Embodiment III

[0100] This embodiment provides an extension control method for a tiltable and extendable RV. By this method, the tiltable and extendable RV proposed in Embodiment I is controlled. The method includes:

[0101] Using a control panel (or remote control) to generate control instructions, and the controller controls the operation of the motor in the extension mechanism according to the control instructions, thereby driving the movement of the rack in the extension mechanism, driving the extension rod and the extension cabin to extend outwards or retract inwards, and changing the tilt angle of the extension cabin during the extension or retraction process.

[0102] Furthermore, it also includes: using the angle sensor, light sensor, and wind speed sensor installed on the extension cabin to real-time monitor the tilt angle of the extension cabin, light angle and intensity, wind speed and wind direction angle, and feedback the monitoring data to the controller;

[0103] The controller processes the data according to the real-time monitored data, calculates the optimal tilt angle and the height of the support leg through a preset relationship model, automatically generates a motor drive instruction, and drives the motor to make corresponding adjustments according to this instruction to reach the optimal tilt angle of the extension cabin. The generated motor drive instruction includes the drive instruction of the motor in the extension mechanism and the drive instruction of the drive motor in the support leg. By adjusting the extension degree of the extension cabin and the height of the support leg, the tiltable extension of the extension cabin is realized.

[0104] Specifically, when the RV is in a parking and camping scenario and it is necessary to expand the extension cabin to increase the activity space, the entire control process of the extension of the extension cabin is as follows:

[0105] Step S1: The user starts the motor through the control panel or remote control, and the motor begins to run.

[0106] Step S2: The motor drives the gear mounting shaft to rotate through the transmission square tube, and then drives the gear to rotate.

[0107] Step S3: The gear meshes with the rack. As the gear rotates, the rack starts to move outwards. Since the thicknesses of the front and rear ends of the rack are different, the movement of the rack will cause the front end of the expansion part to tilt downwards and the rear end to tilt upwards.

[0108] Step S4: Through the preset control program, the rotational speed and rotation time of the motor can accurately control the moving distance of the rack, thereby controlling the tilt angle of the expansion cabin. For example, when the rack moves to a predetermined position, the motor automatically stops rotating. At this time, the expansion cabin forms an inclination angle of 0.6° downwards.

[0109] Step S5: After the expansion cabin is fully extended and reaches the predetermined tilt angle, the electric support legs are started. By controlling the electric support legs on both the left and right sides, their heights are adjusted to keep the expansion cabin stable. Preferably, the height adjustment of the support legs can be achieved through manual or automatic control to ensure the stability of the expansion cabin in the tilted state.

[0110] Through the above expandable mechanism with tilt function proposed in this embodiment, this expandable mechanism is applied to the expansion of a recreational vehicle. And through the set control method, when the expansion cabin of the recreational vehicle expands outwards, it can automatically generate a certain downward tilt angle, and can adaptively adjust this expansion angle according to specific situations, enabling the expansion cabin of the recreational vehicle to have the characteristics of preventing rainwater backflow, facilitating cleaning and drainage, optimizing the viewing angle, reducing reflection interference, enhancing wind resistance performance, etc., and solving the problems existing in the parallel expansion mechanism.

[0111] The above are only the preferred embodiments of the present invention. Although the specific implementation manners of the present invention are described in conjunction with the drawings, it is not a limitation to the protection scope of the present invention. Those skilled in the art should understand that based on the technical solutions of the present invention, various modifications or deformations that can be made by those skilled in the art without creative efforts are still within the protection scope of the present invention.

Claims

1. An expansion mechanism capable of tilting and expanding, characterized in that: It comprises a supporting component, a driving component and an expanding component; the supporting component comprises two hollow supporting rods arranged in parallel, the expanding component comprises two expanding rods respectively arranged inside the two hollow supporting rods, a rack is fixedly installed at the bottom of the expanding rod, a first opening matching the rack is opened at the bottom of the supporting rod, and the rack protrudes out of the supporting rod through the first opening; wherein the thickness of the front and rear ends of the rack is different and the thickness of the rack increases or decreases from the front to the rear; The driving component includes a motor and a transmission square tube. The motor is fixedly arranged on the transmission square tube. Gear mounting shafts are arranged on both sides of the transmission square tube. Gears are fixedly installed on the gear mounting shafts. The gears are meshed with racks. The motor drives the transmission square tube and the gear mounting shaft to rotate, driving the gears at the end to rotate, thereby driving the rack and the expansion rod to extend outward or retract inward, and changing the inclination angle of the expansion rod during the extension or retraction process.

2. The tiltable expansion mechanism according to claim 1, characterized in that: Fixed plates are fixed on both sides of the ends of the two support rods, and bearings are provided on the inner side of each fixed plate. The bearings are fixed to the fixed plates through shaft end retaining rings, and a second opening is opened at the bottom of the end of the support rod, and the top of the bearing supports the expansion rod in the support rod through the second opening; the end of the gear mounting shaft is rotatably connected to the fixed plate.

3. The tiltable expansion mechanism according to claim 1, characterized in that: The expansion component also includes a connecting rod vertically connecting the ends of the two expansion rods.

4. A tiltable and expandable RV, characterized in that: It includes a motorhome body, a main body compartment is installed on the motorhome body, an expansion cabin is arranged inside the main body compartment, and the bottom of the main body compartment is provided with an expansion mechanism that can be tilted and expanded as described in any one of claims 1-3, the expansion cabin cooperates with the expansion mechanism, the expansion cabin is extended or retracted in the main body compartment as the expansion mechanism is extended or retracted, and the overall tilt angle of the expansion cabin is changed during the extension or retraction process.

5. A tiltable and expandable RV as claimed in claim 4, characterized in that: The support rod in the expansion mechanism is fixedly installed at the bottom of the RV body, the opening surface of the expansion cabin is sealed and connected to the main compartment, and the outer wall of the expansion cabin is fixedly connected to the connecting rod in the expansion mechanism on the same vertical plane.

6. The tiltable and expandable RV according to claim 4, characterized in that: The contact part between the opening surface of the expansion cabin and the main compartment is provided with D-shaped rubber sealing rings on both sides inside and outside, so that the opening surface of the expansion cabin is sealed and connected with the main compartment.

7. The tiltable and expandable RV according to claim 4, characterized in that: There are multiple independently height-adjustable support legs at the bottom of the expansion cabin, which are used to support the entire expansion cabin; Among them, the supporting tripod includes an outer tripod tube and an inner tripod tube as the main body. The inner tripod tube is sleeved inside the outer tripod tube, and a foot pad is fixed at the lower end of the inner tripod tube. The supporting tripod is also provided with a driving motor, which is used to drive the inner tripod tube to move up and down inside the outer tripod tube to adjust the length of the entire tripod.

8. The tiltable and expandable RV according to claim 7, characterized in that: The main body compartment is provided with a controller, a control panel, a motor driver, and a support tripod controller; the expansion cabin is provided with an angle sensor, a light sensor, and a wind speed sensor; the various sensors provided, as well as the motor driver, the support tripod controller, and the control panel are all electrically connected to the controller; the motor driver is electrically connected to the motor in the expansion mechanism; and the support tripod controller is electrically connected to the drive motor in the support tripod; The control panel is used to generate control instructions and transmit them to the controller to start or stop the operation of the motor; The motor driver is used to control the speed and rotation time of the motor according to the motor drive instruction, so as to control the moving distance of the rack and further control the tilt angle of the expansion cabin; The support stand controller is used to control the height adjustment of the electric support stand according to the motor drive instruction; The angle sensor is used to monitor the tilt angle of the expansion cabin in real time and feed the monitoring data back to the controller; The light sensor is used to monitor the light angle and intensity in real time and feed the monitoring data back to the controller; The wind speed sensor is used to monitor the wind speed and wind direction in real time, and feed the monitoring data back to the controller; The controller is used to calculate the optimal tilt angle and support tripod height through a preset relationship model according to the monitored expansion cabin tilt angle, light angle and intensity, wind speed and wind direction angle, and automatically generate motor drive instructions.

9. A method for controlling the expansion of a tiltable expandable RV, characterized in that: For controlling a tiltable and expandable RV as claimed in any one of claims 4 to 8, the method comprising: The control panel is used to generate control instructions. The controller controls the operation of the motor in the expansion mechanism according to the control instructions, drives the movement of the rack in the expansion mechanism, drives the expansion rod and the expansion cabin to extend outward or retract inward, and changes the inclination angle of the expansion cabin during the extension or retraction process.

10. The expansion control method of a tiltable expandable RV according to claim 9, characterized in that: Also includes: The angle sensor, light sensor and wind speed sensor installed on the expansion cabin are used to monitor the inclination angle, light angle and intensity, wind speed and wind direction of the expansion cabin in real time, and the monitoring data is fed back to the controller; The controller processes data based on real-time monitoring data, calculates the optimal tilt angle and support stand height through a preset relationship model, and automatically generates motor drive instructions; According to the motor drive instructions, the drive motor adjusts the expansion cabin to extend or retract it to achieve the optimal tilt angle of the expansion cabin.

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