A single- and double-layer convertible RV

Abstract

The present invention discloses a single- and double-layer variable RV, comprising a conventional carriage, an upper carriage arranged above the conventional carriage, the upper carriage using the roof of the conventional carriage as the bottom plate, the upper carriage comprising a top cover, a top cover side skirt, a bottom plate upper skirt, a top cover lower skirt and a foldable side skirt, the RV is also provided with a single- and double-layer conversion system, comprising a plurality of vertically arranged lifting support devices, the lifting support devices at least consisting of a main body and lifting columns and symmetrically distributed on both sides of the RV body, the main body being fixedly connected to the side frame of the conventional carriage, the lower end of the main body being connected to the body bottom frame of the conventional carriage, the upper end of the main body being connected to the roof of the conventional carriage, the lifting columns being telescopically inserted into the main body, the upper end of the lifting columns being connected to the roof of the upper carriage, and the main body having an extension section protruding from the bottom plate of the upper carriage. The present invention integrates the functions of a house and a car through single- and double-layer conversion, with low cost and good economy.

Description

Technical Field

[0001] The invention relates to the technical field of recreational vehicles, in particular to a single-layer or double-layer convertible recreational vehicle. Background Art

[0002] RVs have both the functions of a "house" and a "car". They are a type of mobile vehicle that has the basic facilities necessary for a home. The "car" function is reflected when the vehicle is in motion, while the "house" function is reflected in the passengers' comprehensive feelings about the RV during their travel life, especially the feelings about the RV's use as a living, entertainment, and resting space.

[0003] RVs in the prior art, whether they are trailer RVs or self-propelled RVs, are generally single-layer structures. There are very few luxury RVs with large bodies and high prices. Such RVs are difficult to drive and control, difficult to park, and require a large parking space, especially trailer RVs. The available space for such luxury RVs in travel life is still relatively small, and the problem of few beds or insufficient sleeping and resting space for passengers is particularly obvious; most RVs have small bodies, and the available space in travel life is even smaller. The low height gives people a sense of oppression and cannot meet the needs of multiple people traveling.

[0004] There are also some propped-up double-decker RVs, folding RVs and expandable RVs. These RVs increase the usable area or space to a certain extent, but there are safety hazards to a certain extent. The operation is relatively complicated, the contraction and unfolding of the body is time-consuming and labor-intensive, and the reliability and stability are poor, which brings many inconveniences and bad experiences to travel life.

[0005] For example, the "Push-up Double-Decker RV" disclosed in the Chinese patent application number 201410064028.1 is a push-up double-decker RV with convertible single- and double-layer spaces. It is composed of a car chassis, a box body, a shell cover, a power telescopic shaft rod system, a guiding balancing mechanism, a sealing mechanism and multiple locking and biting mechanisms. The box body is fixed on the car chassis, and the shell cover is arranged on the box body. The shell cover and the box body are connected by a power telescopic shaft rod system and a guiding balancing mechanism. The shell cover and the top plate and upper skirt of the box body together constitute the upper activity space; the power telescopic shaft rod system is used to support and fold the shell cover; the guiding balancing mechanism is installed between the shell cover and the box body, and is used to keep the shell cover running smoothly during the supporting and folding process; the sealing structure is arranged between the shell cover and the box body; the locking and biting mechanism is installed on the side walls of the box body and the shell cover. This type of RV has a liftable and foldable shell added to the body of the vehicle. The shell is raised to become a double-layer, which achieves the purpose of expanding the space, but the shell is slightly larger than the body. The lifting and retracting process of the shell is time-consuming and labor-intensive, and the shell structure is complex. Various matching issues between the shell and the body need to be considered, and more reliability problems may arise. In addition, due to the large mass of the shell itself, the center of gravity of the body changes significantly after it is lifted into a double layer, and stability problems may also arise. Solving these problems will undoubtedly increase design and production costs, and the price of the RV is high.

[0006] In summary, it is difficult for existing RVs to strike a balance between the two functions of "house" and "car". As a "house", we hope that the body space is as large as possible, but as a "car", we hope that the body is as small as possible. At present, there is no economical RV that balances the two functions of "house" and "car", which can fully play the function of "car" and show good "house" function, and at the same time achieve the purpose of safety, reliability, system stability and convenient operation at a low cost. Summary of the invention

[0007] The invention discloses a single-layer or double-layer convertible RV, and aims to provide a RV with relatively low cost, reliable system and large space required for travel and living.

[0008] The technical solution adopted by the present invention is as follows:

[0009] A single-layer or double-layer convertible saloon car comprises a conventional carriage, characterized in that it also comprises an upper carriage arranged above the conventional carriage, the upper carriage uses the roof of the conventional carriage as a bottom plate, the upper carriage comprises a roof, a roof side skirt, a bottom plate skirt, a top cover lower skirt and a foldable side surround, the top cover and the top cover side skirt are fixedly connected to form a roof that matches the shape of the conventional carriage roof and can cover the conventional carriage roof from the outside, the bottom plate upper skirt is fixedly connected to the side of the bottom plate, the top cover lower skirt is located on the inner side of the top cover side skirt and is fixedly connected to the side of the top cover, and the bottom plate skirt and the top cover lower skirt are connected by the foldable side surround;

[0010] The RV is also provided with a single-double-layer conversion system, which includes a plurality of vertically arranged lifting support devices, the lifting support devices are composed of at least a main body and a lifting column and are symmetrically distributed on both sides of the RV body, the main body is fixedly connected to the side frame of the conventional carriage, the lower end of the main body is connected to the body chassis of the conventional carriage, the upper end of the main body is connected to the roof of the conventional carriage, the lifting column is telescopically inserted into the main body, the upper end of the lifting column is connected to the roof of the upper carriage, and the main body has an extension section protruding from the bottom plate of the upper carriage, the extension section serves to strengthen the foundation of the lifting column when the lifting column is in a high position and enhance the stability of the lifting column.

[0011] When the single-layer or double-layer variable RV of the present invention arrives at the station and is used as a RV, the top cover of the upper compartment is lifted by the lifting column of the lifting support device, and the foldable side wall is unfolded, so that the upper compartment becomes a living space highly suitable for passengers to travel and live, and is transformed into a double-layer RV. Before driving, if the RV is in a double-layer form, the lifting column of the lifting support device is retracted and descended, so that the top cover of the upper compartment is lowered to the lowest point. At this time, the distance between the top cover and the top plate of the conventional compartment is the height of the main body extension section. The foldable side wall is folded into the top cover side skirt when the top cover is lowered, and the top cover side skirt covers the top plate of the conventional compartment and the upper part of the side wall of the conventional compartment from the outside. The weight of the upper compartment of the present invention is small compared with the weight of the whole vehicle, accounting for about 5% of the whole vehicle, the upper compartment has less consumables, low cost and good economy, and the upper compartment has less influence on the center of gravity of the whole vehicle after it is lifted, and has good stability. Because the mass of the upper compartment is small, the control of the compartment when it is unfolded and retracted is also more convenient, which can save time and energy. When driving, the upper compartment is lowered to become a single-layer RV, which can be driven and parked like a regular RV.

[0012] The roof of the conventional carriage of the present invention is provided with a staircase opening, and a hidden lifting staircase is provided at the staircase opening to facilitate passage between the conventional carriage and the raised upper carriage. After the hidden lifting staircase is folded, it is buckled into the interior of the conventional carriage and hidden between the roof of the conventional carriage and the roof cover of the upper carriage.

[0013] The roof side skirts of the present invention are rainproof and ventilated louver structures, which can improve the wind resistance of the RV when it is in a double-layer form.

[0014] The outer side of the foldable side enclosure of the present invention is formed by sewing or gluing canvas, oxford cloth or other foldable materials, and the inner side of the foldable side enclosure is formed by sewing or gluing an interior layer of leather, cloth or other foldable materials, and a foldable heat-insulating material can be filled between the outer side and the inner side of the foldable side enclosure. The side enclosure not only achieves the purpose of folding, but also has light weight and heat-insulating ability.

[0015] The foldable side enclosure of the present invention is provided with a plurality of windows, in which foldable flexible transparent windows, such as plastic sheets, are installed, which can not only ensure the light in the upper compartment but also enable observation outside the vehicle.

[0016] The inner side of the edge of the side skirt of the upper compartment roof of the present invention is provided with an anti-collision pad, which prevents the side skirt of the upper compartment roof from colliding and rubbing with the side wall of the conventional compartment to damage the car body when the upper compartment is lowered to become a single-layer RV, and has good sealing performance.

[0017] The lower part of the upper compartment of the present invention is equipped with a vertical folding guardrail close to the inner side of the skirt on the bottom plate. The folding guardrail is distributed around the edges of the upper compartment. After the upper compartment is raised, the folding guardrail is opened to form a guardrail with a height of 600-800mm. Before the RV becomes a single-layer, the folding guardrail is folded into a linear shape and placed around the edges of the upper compartment, hidden between the top cover of the upper compartment and the top plate of the conventional compartment.

[0018] The top cover of the present invention is provided with a skylight, and a solar panel can be installed on the upper surface of the top cover.

[0019] The lifting support device of the present invention is a hydraulic device, the main body is a cylinder barrel of a hydraulic cylinder, and the lifting column is a piston rod of the hydraulic cylinder.

[0020] The single-double-layer conversion system of the present invention further comprises an oil station control system for controlling the lifting and lowering of the lifting columns of the lifting support device.

[0021] The oil station control system of the present invention includes an oil station integrated module and a flow-dividing and flow-collecting anti-dropping module. The oil station integrated module includes an oil tank and an automatic control oil circuit. The starting end of the automatic control oil circuit is connected to the oil tank, and includes a first coarse filter, an oil pump with a motor, a first one-way valve, a first overflow valve, a fine filter connected in parallel with a differential pressure gauge, a three-position four-way solenoid reversing valve, and an oil cylinder upstream oil pipe and an oil cylinder downstream oil pipe connected to the three-position four-way solenoid reversing valve. The oil cylinder upstream oil pipe is connected to the lower oil chamber of the hydraulic cylinder through the flow-dividing and flow-collecting anti-dropping module, and the oil cylinder downstream oil pipe is connected to the upper oil chamber of the hydraulic cylinder through the flow-dividing and flow-collecting anti-dropping module. The hydraulic oil in the lower oil chamber of each hydraulic cylinder and the upper oil chamber of each hydraulic cylinder flows in or out in equal amounts through the flow-dividing and flow-collecting anti-dropping module. The automatic control oil circuit is also connected to an accumulator, which is used to store energy in the system and overcome oil circuit pulsation and water hammer phenomena.

[0022] The flow-dividing and collecting anti-falling module of the present invention comprises an upward flow-dividing and collecting anti-falling module and a downward flow-dividing and collecting module. The upward flow-dividing and collecting anti-falling module is connected with the upward oil pipe of the oil cylinder and the lower oil chamber of the hydraulic oil cylinder, and the downward flow-dividing and collecting module is connected with the downward oil pipe of the oil cylinder and the upper oil chamber of the hydraulic oil cylinder. The pipeline of the upward flow-dividing and collecting anti-falling module and the lower oil chamber of each hydraulic oil cylinder is provided with a second one-way valve for oil inlet and a second overflow valve for oil return in parallel, and is also provided with an oil pressure sensor connected to a PLC controller. The PLC controller The motor of the oil pump is connected to the device. The combination of the second one-way valve and the second relief valve can achieve the purpose of preventing falling. When the piston rod of the hydraulic cylinder needs to rise, the hydraulic oil enters the lower oil chamber of the hydraulic cylinder from the upper oil pipe of the cylinder through the second one-way valve, so that the piston rod of the hydraulic cylinder rises smoothly. When the piston rod of the hydraulic cylinder needs to drop, the hydraulic oil in the lower oil chamber of the hydraulic cylinder needs to return to the oil tank. The return flow cannot pass through the second one-way valve, but returns through the second relief valve. The opening pressure of the second relief valve is preset according to the system pressure. During the oil return process, the system pressure keeps supporting the load. Because the return oil needs to pass through the second relief valve, when there is leakage in the oil circuit of the oil station integrated module, the oil pressure in the hydraulic cylinder can also be guaranteed to be stable, preventing the upper compartment from abnormally falling, rising or falling.

[0023] The automatic control oil circuit between the fine filter and the three-position four-way electromagnetic reversing valve of the present invention is provided with a first stop valve and a first hydraulically controlled non-return valve in sequence, the upstream oil pipe of the oil cylinder is provided with a second hydraulically controlled non-return valve, and the downstream oil pipe of the oil cylinder is provided with a third hydraulically controlled non-return valve. A first branch is connected to the oil circuit between the first stop valve and the first hydraulically controlled non-return valve, and a two-position three-way electromagnetic reversing valve is provided on the first branch for controlling the opening and closing of the first hydraulically controlled non-return valve, the second hydraulically controlled non-return valve and the third hydraulically controlled non-return valve.

[0024] During normal operation, the two-position three-way solenoid reversing valve is energized. When the piston rod of the hydraulic cylinder rises, the hydraulic oil enters the two-position three-way solenoid reversing valve through the first branch, so that the first, second, and third hydraulically controlled one-way valves are opened, and the hydraulic oil flows into the three-position four-way solenoid reversing valve through the first hydraulically controlled one-way valve. At this time, the three-position four-way solenoid reversing valve is energized as a parallel channel, and the hydraulic oil enters the upward oil pipe of the cylinder, and flows into the lower oil chamber of each hydraulic cylinder after being diverted by the diverter and collector module. The hydraulic oil in the upper oil chamber of the hydraulic cylinder is collected by the diverter and collector module and then flows back to the oil tank through the cylinder downward oil pipe and the three-position four-way solenoid reversing valve. When the piston rod of the hydraulic cylinder descends, the cross channel of the three-position four-way solenoid reversing valve is energized, and the hydraulic oil flow direction of the upper and lower oil chambers of the hydraulic cylinder is opposite to that when the piston rod rises. When the two-position three-way solenoid reversing valve and the three-position four-way solenoid reversing valve lose power, they are both in the middle position, and the oil circuit is in the locked position state and the hydraulic oil cannot flow.

[0025] In the present invention, a second branch is connected to the automatic control oil circuit between the fine filter and the first stop valve, and the accumulator is arranged on the second branch.

[0026] The end of the second branch of the present invention is connected to a first three-position four-way manual reversing valve as a manual control oil circuit, and the two oil ports of the first three-position four-way manual reversing valve are respectively connected to the oil cylinder upward oil pipe and the oil cylinder downward oil pipe. The manual control oil circuit is used when the two-position three-way electromagnetic reversing valve and / or the three-position four-way electromagnetic reversing valve fails, and the channel of the first three-position four-way manual reversing valve is manually switched, and the motor of the oil pump is turned on to complete the lifting and lowering of the piston rods of each hydraulic cylinder.

[0027] The oil station integrated module of the present invention also includes a hand pump control oil circuit, the beginning of which is connected to the oil tank, and a hand pump and a second three-position four-way manual reversing valve are arranged on the hand pump control oil circuit, and two oil ports of the second three-position four-way manual reversing valve are respectively connected to the oil cylinder upward oil pipe and the oil cylinder downward oil pipe. The hand pump control oil circuit can be used as a standby when both the automatic control oil circuit and the manual control oil circuit fail, and the system is pressurized by the hand pump, and the channel of the second three-position four-way manual reversing valve is manually switched to control the lifting and lowering of the piston rods of each hydraulic oil cylinder.

[0028] The present invention has the following significant effects:

[0029] 1. The foldable side panels of the upper compartment of the RV of the present invention can be unfolded or folded through the conversion of the lifting support device to complete the switching between single and double layers. When the upper compartment is unfolded, while providing passengers with a comfortable and spacious living, entertainment and rest space, it has less consumables, low cost, strong economy and practicality, and the mass of the upper compartment is small, so that the stability of the RV in the double-layer form is good, and the shrinking and unfolding operations during the conversion between single and double layers are more time-saving and labor-saving. After the upper compartment is shrunk, the RV is converted into a single-layer state without affecting the vehicle's driving controllability and normal parking. The extended section of the lifting support device body provides a more solid foundation for the lifting column, prevents the lifting column from bending and deforming at the root, and also ensures the height between the top plate of the conventional compartment and the top cover of the upper compartment, which becomes a storage space for items in the upper compartment and folded items. In addition, the lifting support device of the present invention is integrated with the side panel frame of the conventional compartment, which effectively ensures the stability of the lifting support device.

[0030] 2. The hidden lifting staircase of the present invention facilitates passage between the conventional carriage and the upper carriage.

[0031] 3. The roof side skirts of the present invention are rainproof and ventilated louver structures, and in the form of a double-decker RV, the wind-blocking ability is strong.

[0032] 4. The foldable side panels of the present invention are composed of an inner layer and an outer layer, and are made of cloth, leather or other foldable materials. They are light in weight and can be filled with thermal insulation materials, thereby achieving both the protection purpose and the thermal insulation effect.

[0033] 5. The foldable side panels of the present invention are provided with transparent windows, so that when the upper compartment is unfolded, there is good light and a view outside the vehicle, thus satisfying the sightseeing needs of passengers inside the vehicle.

[0034] 6. The anti-collision pad on the inner side of the edge of the side skirt of the upper compartment roof of the present invention can prevent damage to the vehicle body when the single-layer or double-layer is changed, and at the same time enhances the sealing performance.

[0035] 7. The upper compartment of the present invention is provided with a foldable guardrail, which improves the protection effect of the upper compartment.

[0036] 8. The present invention adopts a hydraulic cylinder as a lifting control device for the upper compartment, and the lifting control stability is good. In addition, the present invention has an anti-falling function. When in the double-decker RV form, if the top cover of the upper compartment leaks in the oil station control system, the top cover of the upper compartment can be prevented from falling or rising, thereby ensuring the safety of the upper compartment during expansion and contraction.

[0037] 9. The lifting support device of the present invention has three control modes: automatic, manual and hand-cranked pump control. The triple guarantee achieves the purpose of switching between single and double layers during the RV journey, can reduce the troubles caused by the lifting failure of the upper compartment of the RV during the journey, and ensure that the upper compartment can be used normally.

[0038] In summary, the present invention demonstrates the advantage of "small body, large space" through the transformation of single-layer and double-layer carriages. The small body can be folded into a single-layer when driving, and can be unfolded into a double-layer large space RV when stationed, so that the functions of the house and the car are better integrated. The RV of the present invention can be applied to various RVs, which can be either an integral bicycle or a trailer RV. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0040] Figure 1 This is a schematic diagram of the single- and double-layer convertible RV in the first embodiment when it is in a single-layer form;

[0041] Figure 2 This is a schematic diagram of the single- and double-layer convertible RV in the first embodiment when it is in a double-layer form;

[0042] Figure 3 It is a plan view of the bottom plate of the upper compartment in the first embodiment;

[0043] Figure 4 It is a plan view of the interior of the roof of the upper compartment in the first embodiment;

[0044] Figure 5 This is a schematic diagram of the oil station control system of the lifting support device of the present invention;

[0045] Figure 6 for Figure 5 A magnified view of the integrated module of the oil station;

[0046] Figure 7 for Figure 5 Enlarged view of the middle flow-dividing and collecting anti-dropping module and the hydraulic cylinder group;

[0047] Figure 8 It is a schematic diagram of the single-deck and double-deck convertible RV in the second embodiment when it is in a double-deck form;

[0048] Fig. 9 It is a schematic diagram of the single- and double-layer convertible RV in the third embodiment when it is in a double-layer form. DETAILED DESCRIPTION

[0049] Embodiment 1

[0050] like Figures 1 to 4 As shown, a single-layer or double-layer convertible RV of the present embodiment is an integral self-propelled RV, comprising a conventional carriage 1, and an upper carriage arranged above the conventional carriage 1, wherein the upper carriage uses the roof of the conventional carriage 1 as a bottom plate 7, and the upper carriage comprises a top cover 2, a top cover side skirt 3, a bottom plate upper skirt 9, a top cover lower skirt 10, and a foldable side enclosure 6, wherein the top cover 2 and the top cover side skirt 3 are fixedly connected to form a roof that matches the shape of the top plate of the conventional carriage 1 and can cover the top plate of the conventional carriage 1 from the outside, the bottom plate upper skirt 9 is fixedly connected to the side of the bottom plate 7, the top cover lower skirt 10 is fixedly connected to the side of the top cover 2, and the bottom plate skirt 9 and the top cover lower skirt 10 are connected via the foldable side enclosure 6;

[0051] The RV is also provided with a single-double-layer conversion system, which includes four lifting support devices arranged vertically, and the lifting support devices are composed of at least a main body 4 and a lifting column 5 and are symmetrically distributed on both sides of the RV body. The main body 4 is fixedly connected to the side frame of the conventional compartment 1, the lower end of the main body 4 is connected to the body bottom frame of the conventional compartment 1, and the upper end of the main body 4 is connected to the top plate of the conventional compartment 1. The lifting column 5 is telescopically inserted into the main body 4, and the upper end of the lifting column 5 is connected to the top cover 2 of the upper compartment, and the main body 4 has an extension section protruding from the bottom plate 7. The length of the extension section is set to 500mm, which is equal to the distance between the top cover 2 and the bottom plate 7 when the RV becomes a single-layer form after the upper compartment is folded. This space is used to store items in the upper compartment and the foldable side enclosure 6 after folding, see Figure 1 This space is also enough for placing mattresses, quilts, etc. After the upper compartment is unfolded, the RV becomes a double-layer form. After the lifting column 5 lifts the upper roof cover, the height of the upper compartment is not less than 1800mm, and the upper compartment has a spacious entertainment and rest space.

[0052] Specifically, in this embodiment, the metal edges of the edges of the bottom plate 7 of the upper compartment vertically protrude upward by 30-50 mm to form the upper skirt 9 of the bottom plate of the upper compartment, the metal edges of the edges of the inner sides of the top cover side skirt 3 of the upper compartment 2 vertically extend downward by 30-50 mm to form the lower skirt 10 of the top cover, and the foldable side 6 is sealed and riveted or fixed with screws to the skirt 9 on the bottom plate and the lower skirt 10 of the top cover. The main body 4 adopts the cylinder barrel of the hydraulic oil cylinder, and the lifting column 5 is the piston rod of the hydraulic oil cylinder. The base of the cylinder barrel is flexibly connected to the reserved first connection 11 on the body frame of the conventional compartment 1 by bolts through rubber pads, and the upper end of the cylinder barrel is fixedly connected to the reserved second connection 12 of the top plate of the conventional compartment 1. The length of the upper end of the cylinder barrel protruding from the bottom plate 7 of the upper compartment is 500 mm. The lifting column 5 is fixedly connected to the reserved third connection 13 of the top cover 2, and the third connection 13 is provided with a lifting column protective cover.

[0053] As a preferred embodiment:

[0054] The roof of the conventional carriage 1 is provided with a staircase 14, and a hidden lifting staircase is provided at the staircase 14, which is convenient for passage between the conventional carriage 1 and the raised upper carriage. The hidden lifting staircase is buckled inside the conventional carriage after being folded, and is hidden between the roof of the conventional carriage 1 and the roof 2 of the upper carriage. The side skirt 3 of the roof is a rainproof ventilation shutter structure, which can improve the wind resistance of the RV in a double-layer form. A skylight is provided on the roof, such as a panoramic glass window of various sizes or a PC sun panel, and a solar panel can also be installed on the upper surface of the roof, which can not only allow passengers to enjoy the night sky and bathe in the sun, but also provide energy.

[0055] The outer side of the foldable side wall 6 is made of canvas or Oxford cloth or other foldable materials sewn or bonded, and the inner side of the foldable side wall 6 is made of leather or cloth interior layer or other foldable materials sewn or bonded, and the outer and inner sides of the foldable side wall 6 can be filled with foldable insulation materials. The foldable side wall 6 is provided with a plurality of windows, and foldable flexible transparent windows are installed in the windows, which can not only ensure the light in the upper compartment, but also observe the outside of the vehicle.

[0056] An anti-collision pad is provided on the inner side of the edge of the upper compartment roof side skirt 3 to prevent the upper compartment roof side skirt 3 from colliding and rubbing with the side wall of the conventional compartment 1 to damage the vehicle body when the upper compartment is lowered to become a single-layer RV, and the pad has sealing properties.

[0057] A vertical folding guardrail 8 is installed on the inner side of the skirt 9 on the bottom plate at the lower part of the upper compartment. The folding guardrail 8 is distributed on the four edges of the upper compartment. After the upper compartment is raised, the folding guardrail 8 is opened to form a guardrail with a height of 600-800mm. Before the RV becomes a single-layer, the folding guardrail 8 is folded into a linear shape and placed on the four edges of the upper compartment, hidden between the roof of the upper compartment and the roof of the conventional compartment.

[0058] The single-double-layer conversion system of the present invention further comprises an oil station control system for controlling the lifting and lowering of the lifting columns of the lifting support device.

[0059] like Figures 5 to 7As shown, the oil station control system of the present invention includes an oil station integrated module A and a flow dividing and collecting flow anti-dropping module B, the flow dividing and collecting flow anti-dropping module B is connected to a hydraulic cylinder group C with four hydraulic cylinders, the oil station integrated module A includes an oil tank T and an automatic control oil circuit, the starting end of the automatic control oil circuit is connected to the oil tank T, and includes a first coarse filter F1, an oil pump PI with a motor MI, a first one-way valve D1, a first overflow valve YR1, and a differential pressure gauge Y in parallel. C1's fine filter F3, three-position four-way solenoid reversing valve DC1, and the cylinder upward oil pipe and cylinder downward oil pipe connected to the three-position four-way solenoid reversing valve DC1, the cylinder upward oil pipe is connected to the lower oil chamber of the hydraulic cylinder through the flow-dividing and collecting anti-dropping module B, the cylinder downward oil pipe is connected to the upper oil chamber of the hydraulic cylinder through the flow-dividing and collecting anti-dropping module B, and the hydraulic oil of each hydraulic cylinder lower oil chamber and each hydraulic cylinder upper oil chamber flows in or out in equal amounts through the flow-dividing and collecting anti-dropping module B. The automatic control oil circuit is also connected to accumulators A1.1 and A1.2, which are used to store energy in the system and overcome oil circuit pulsation and water hammer phenomena. The diverter and collector anti-falling module B includes an upward diverter and collector anti-falling module and a downward diverter and collector module. The upward diverter and collector anti-falling module connects the upward oil pipe of the oil cylinder and the lower oil chamber of the hydraulic cylinder. It includes a first diverter and collector pipe A1 and a first diverter and collector pipe A2. The first diverter and collector pipe A1 connects the lower oil chambers of the two hydraulic cylinders through the second diverter and collector pipe A11 and the second diverter and collector pipe A12. The first diverter and collector pipe A2 connects the lower oil chambers of the other two hydraulic cylinders through the second diverter and collector pipe A21 and the second diverter and collector pipe A22.The downward flow shunting and collecting module connects the downward oil pipe of the oil cylinder and the upper oil chamber of the hydraulic oil cylinder, and includes a third flow shunting and collecting pipe B1 and a third flow shunting and collecting pipe B2. The third flow shunting and collecting pipe B1 connects the upper oil chambers of the two hydraulic oil cylinders through a fourth flow shunting and collecting pipe B11 and a fourth flow shunting and collecting pipe B12. The third flow shunting and collecting pipe B2 connects the upper oil chambers of the other two hydraulic oil cylinders through a fourth flow shunting and collecting pipe B21 and a fourth flow shunting and collecting pipe B22. The pipeline of the upward flow shunting and collecting anti-falling module and the lower oil chamber of each hydraulic oil cylinder is provided with a second one-way valve D2, D3, D4, D5 for oil inlet in parallel and a second overflow valve YR2, YR3, YR4, YR5 for oil return, and is also provided with a connection to the PLC control. The oil pressure sensors KP2, KP3, KP4, KP5 and oil pressure gauges G2, G3, G4, G5 of the controller, the PLC controller is connected to the motor MI of the oil pump PI, and the combination of the second one-way valve and the second overflow valve can achieve the purpose of preventing falling: when the piston rod of the hydraulic cylinder needs to rise, the hydraulic oil enters the lower oil chamber of the hydraulic cylinder from the upper oil pipe of the cylinder through the second one-way valve, so that the piston rod of the hydraulic cylinder rises smoothly. When the piston rod of the hydraulic cylinder needs to drop, the hydraulic oil in the lower oil chamber of the hydraulic cylinder needs to return to the oil tank. The return flow cannot pass through the second one-way valve, but returns through the second overflow valve. The opening pressure of the second overflow valve is preset according to the system pressure. During the oil return process, the system pressure keeps supporting the load. Because the return oil needs to pass through the second overflow valve, when there is leakage in the oil circuit of the oil station integrated module, the oil pressure in the hydraulic cylinder can also be guaranteed to be stable, preventing the upper compartment roof from abnormally falling or rising or falling. The pipelines connecting the downstream flow dividing and collecting modules with the upper oil chambers of each hydraulic cylinder are provided with oil pressure sensors KP2', KP3', KP4', KP5' and oil pressure gauges G2', G3', G4', G5'. The pipelines connecting the upper oil chambers and the lower oil chambers of the four hydraulic cylinders are provided with pairs of stop valves YM9, YM9'; YM10, YM10'; YM11, YM11'; YM12, YM12'.

[0060] The automatic control oil circuit between the fine filter F3 of the present invention and the three-position four-way electromagnetic reversing valve DC1 is provided with a first stop valve YM7 and a first hydraulically controlled one-way valve YKD1 in sequence, the upward oil pipe of the oil cylinder is provided with a second hydraulically controlled one-way valve YKD2, and the downward oil pipe of the oil cylinder is provided with a third hydraulically controlled one-way valve YKD3. A first branch is connected to the oil circuit between the first stop valve YM7 and the first hydraulically controlled one-way valve YKD1, and a two-position three-way electromagnetic reversing valve DC2 is provided on the first branch for controlling the opening and closing of the first hydraulically controlled one-way valve YKD1, the second hydraulically controlled one-way valve YKD2 and the third hydraulically controlled one-way valve YKD3.

[0061] During normal operation, the two-position three-way solenoid reversing valve DC2 is energized. When the piston rod of the hydraulic cylinder rises, the hydraulic oil enters the two-position three-way solenoid reversing valve DC2 through the first branch, opening the first, second and third hydraulically controlled one-way valves, and the hydraulic oil flows into the three-position four-way solenoid reversing valve DC1 through the first hydraulically controlled one-way valve YKD1. At this time, the three-position four-way solenoid reversing valve DC1 is energized as a parallel channel, and the hydraulic oil enters the cylinder upstream oil pipe, and after being diverted by the upstream diversion and collection anti-falling module, it flows into the lower oil chamber of each hydraulic cylinder through the one-way valves D2, D3, D4, and D5. The hydraulic oil in the upper oil chamber of the hydraulic cylinder is collected by the downward diversion and collection module and then flows back to the oil tank through the cylinder downstream oil pipe and the three-position four-way solenoid reversing valve DC1. When the piston rod of the hydraulic cylinder descends, the cross channel of the three-position four-way solenoid reversing valve DC1 is energized, and the hydraulic oil flow direction of the upper and lower oil chambers of the hydraulic cylinder is opposite to that when the piston rod is raised. The hydraulic oil in the return oil circuit flows through the overflow valves YR2, YR3, YR4, and YR5 and then flows back to the oil tank after being collected by the upward flow dividing and collecting module. When the two-position three-way solenoid reversing valve DC2 and the three-position four-way solenoid reversing valve DC1 lose power, they are both in the middle position. At this time, the oil circuit is in the locked position and the hydraulic oil cannot flow.

[0062] A second branch is connected to the automatic control oil circuit between the fine filter F3 and the first stop valve YM7, and the accumulator A1.1 and the accumulator A1.2 are both arranged on the second branch.

[0063] The end of the second branch is connected to a first three-position four-way manual reversing valve SCF1 as a manual control oil circuit, and the two oil ports of the first three-position four-way manual reversing valve SCF1 are respectively connected to the upward oil pipe of the oil cylinder and the downward oil pipe of the oil cylinder. The pipeline between the first three-position four-way manual reversing valve SCF1 and the accumulator A1.1 and the accumulator A1.2 is provided with an oil pressure sensor KPI, an oil pressure gauge G1 and a second stop valve YM5. The manual control oil circuit is used when the two-position three-way solenoid reversing valve DC2 and / or the three-position four-way solenoid reversing valve DC1 fails. The channel of the first three-position four-way manual reversing valve SCF1 is manually switched, and the motor MI of the oil pump PI is turned on to complete the lifting and lowering of the piston rods of each hydraulic cylinder. The oil pressure sensor KPI can sample the working pressure in the pipeline system, and the sampling data is fed back to the PLC controller, which automatically controls the start and stop of the motor MI.

[0064] The oil station integrated module of the present invention also includes a hand pump control oil circuit, the beginning of which is connected to the oil tank T. A hand pump SOB and a second three-position four-way manual reversing valve SCF2 are arranged on the hand pump control oil circuit, and two oil ports of the second three-position four-way manual reversing valve SCF2 are respectively connected to the oil cylinder upward oil pipe and the oil cylinder downward oil pipe. The hand pump control oil circuit can be used as a standby when both the automatic control oil circuit and the manual control oil circuit fail. The system is pressurized by the hand pump, and the channel of the second three-position four-way manual reversing valve is manually switched to control the lifting and lowering of the piston rods of each hydraulic oil cylinder.

[0065] The oil tank of the present invention is also provided with a temperature relay KY for detecting the oil temperature, and an alarm is sounded when the oil temperature is higher than a set value. A pressure relay TG is provided to detect the tank liquid level, and an alarm is sounded when the oil level is low. A liquid level gauge H is also provided to monitor the liquid level in real time. A second coarse filter F2 is provided on the refueling port pipeline of the oil tank.

[0066] In order to facilitate the maintenance of the accumulator and the reversing valve in the present invention, other corresponding stop valves are also provided on the pipeline.

[0067] Embodiment 2

[0068] like Figure 8 As shown, the difference between this embodiment and embodiment 1 is that this embodiment is another type of integrated motorhome, the size, appearance, and wheel configuration of the body are different, but the structural composition and principle are the same as those of embodiment 1.

[0069] Embodiment 3

[0070] like Fig. 9 As shown, the difference between this embodiment and the first embodiment is that this embodiment is a body part of a trailer-type RV, and its structural composition and principle are the same as those of the first embodiment.

[0071] The above embodiments of the present invention are not intended to limit the protection scope of the present invention, and the implementation modes of the present invention are not limited thereto. All other modifications, replacements or changes made to the above structures of the present invention based on the above contents of the present invention, in accordance with common technical knowledge and customary means in the art, without departing from the above basic technical ideas of the present invention, should fall within the protection scope of the present invention.

Claims

1. A single-deck or double-deck convertible RV, comprising a conventional carriage, characterized in that: It also includes an upper compartment arranged above the conventional compartment, the upper compartment uses the roof of the conventional compartment as a bottom plate, the upper compartment includes a top cover, a top cover side skirt, a skirt on the bottom plate, a top cover lower skirt and a foldable side surround, the top cover and the top cover side skirt are fixedly connected to form a roof that matches the shape of the conventional compartment roof and can cover the conventional compartment roof from the outside, the top plate skirt is fixedly connected to the side of the bottom plate, the top cover lower skirt is located on the inner side of the top cover side skirt and fixedly connected to the side of the top cover, the bottom plate skirt and the top cover lower skirt are connected by the foldable side surround, the top cover side skirt is a rainproof ventilation louver structure, and an anti-collision pad is provided inside the edge of the top cover side skirt; The RV is also provided with a single-double-layer conversion system, which includes a plurality of vertically arranged lifting support devices, the lifting support devices are at least composed of a main body and lifting columns and are symmetrically distributed on both sides of the RV body, the main body is fixedly connected to the side frame of the conventional compartment, the lower end of the main body is connected to the body bottom frame of the conventional compartment, the upper end of the main body is connected to the top plate of the conventional compartment, the lifting columns are telescopically inserted into the main body, the upper ends of the lifting columns are connected to the top cover of the upper compartment, and the main body has an extension section protruding from the bottom plate of the upper compartment; The lifting support device is a hydraulic device, the main body is the cylinder of the hydraulic cylinder, the lifting column is the piston rod of the hydraulic cylinder, the single-double-layer conversion system also includes an oil station control system for controlling the lifting of the lifting column of the lifting support device, the oil station control system includes an oil station integrated module and a flow dividing and collecting anti-falling module, the oil station integrated module includes an oil tank and an automatic control oil circuit, the starting end of the automatic control oil circuit is connected to the oil tank, including a first coarse filter arranged in sequence from the starting end to the end of the automatic control oil circuit, an oil pump with a motor, a first one-way valve, a first overflow valve, a fine filter connected in parallel with a differential pressure gauge, a three-position four-way solenoid reversing valve, and an oil cylinder upstream oil pipe and an oil cylinder downstream oil pipe connected to the three-position four-way solenoid reversing valve, the oil cylinder upstream oil pipe is connected to the lower oil chamber of the hydraulic cylinder through the flow dividing and collecting anti-falling module, and the oil cylinder downstream The oil pipe is connected to the upper oil chamber of the hydraulic cylinder through the diverter and collector anti-falling module, and the hydraulic oil in the lower oil chamber of each hydraulic cylinder and the upper oil chamber of each hydraulic cylinder flows in or out in equal amounts through the diverter and collector anti-falling module. The automatic control oil circuit is also connected to an accumulator. The diverter and collector anti-falling module includes an upward diverter and collector anti-falling module and a downward diverter and collector module. The upward diverter and collector anti-falling module connects the upward oil pipe of the cylinder and the lower oil chamber of the hydraulic cylinder, and the downward diverter and collector module connects the downward oil pipe of the cylinder and the upper oil chamber of the hydraulic cylinder. A second one-way valve for oil inlet and a second overflow valve for oil return are arranged in parallel on the pipeline between the upward diverter and collector anti-falling module and the lower oil chamber of each hydraulic cylinder. An oil pressure sensor connected to a PLC controller is also provided, and the PLC controller is connected to the motor of the oil pump.

2. The single-deck or double-deck convertible RV according to claim 1, characterized in that: The top plate of the conventional carriage is provided with a staircase opening, and a hidden lifting staircase is provided at the staircase opening.

3. The single-deck or double-deck convertible RV according to claim 2, characterized in that: The outer side of the foldable side surround is formed by sewing or gluing canvas or Oxford cloth, the inner side of the foldable side surround is formed by sewing or gluing leather or cloth interior layer, and the space between the outer side and the inner side of the foldable side surround can be filled with foldable heat-insulating material.

4. The single-deck or double-deck convertible RV according to claim 3, characterized in that: The foldable side enclosure is provided with a plurality of windows, and foldable flexible transparent windows are installed in the windows.

5. The single-deck or double-deck convertible RV according to claim 4, characterized in that: A vertical folding guardrail is installed at the lower part of the upper carriage close to the inner side of the skirt on the bottom plate.

6. The single-deck or double-deck convertible RV according to claim 5, characterized in that: A skylight is provided on the top cover, and a solar panel is installed on the upper surface of the top cover.

7. The single-deck or double-deck convertible RV according to claim 1, characterized in that: The automatic control oil circuit between the fine filter and the three-position four-way electromagnetic reversing valve is provided with a first stop valve and a first hydraulically controlled one-way valve in sequence, the upward oil pipe of the oil cylinder is provided with a second hydraulically controlled one-way valve, and the downward oil pipe of the oil cylinder is provided with a third hydraulically controlled one-way valve. The oil circuit between the first stop valve and the first hydraulically controlled one-way valve is connected with a first branch, and the first branch is provided with a two-position three-way electromagnetic reversing valve for controlling the opening and closing of the first hydraulically controlled one-way valve, the second hydraulically controlled one-way valve and the third hydraulically controlled one-way valve; A second branch is connected to the automatic control oil circuit between the fine filter and the first stop valve, and the accumulator is arranged on the second branch; a first three-position four-way manual reversing valve is connected to the end of the second branch to make the second branch serve as a manual control oil circuit, and the two oil ports of the first three-position four-way manual reversing valve are respectively connected to the cylinder upward oil pipe and the cylinder downward oil pipe; the oil station integrated module also includes a hand pump control oil circuit, the starting end of the hand pump control oil circuit is connected to the oil tank, a hand pump and a second three-position four-way manual reversing valve are arranged on the hand pump control oil circuit, and the two oil ports of the second three-position four-way manual reversing valve are respectively connected to the cylinder upward oil pipe and the cylinder downward oil pipe.

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