Single power full lift roof mechanism for motor home

Abstract

The application provides a motor home single-power full-lifting roof mechanism, which comprises a first swing part, a second swing part, a third swing part, a fourth swing part, a first connecting part, a second connecting part, a first supporting part, a second supporting part, a guide part and a driving element, the first swing part, the third swing part and the first connecting part are fixedly connected, the second swing part, the fourth swing part and the second connecting part are fixedly connected, the upper ends of the first supporting part and the second supporting part are rotationally connected with a roof, the middle parts are rotationally connected with the third swing part and the fourth swing part, the lower ends are rotationally connected with the guide part and can move relative to the guide part, the first swing part and the second swing part are driven to swing simultaneously by the driving element, and the first supporting part and the second supporting part are finally driven to move to realize the lifting of the roof. The technical scheme of the application can realize the lifting of the whole roof by only one motor, is simple in operation, reasonable in driving torque size in the lifting process, high in reliability, low in cost, wide in market prospect and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of recreational vehicles, more particularly to a recreational vehicle roof lifting mechanism. BACKGROUND

[0002] With the progress of science and technology and the improvement of people's living standards, more and more people tend to travel and vacation by driving recreational vehicles. The main advantage of recreational vehicles is that they are not limited by external traffic, accommodation, catering and other conditions, and can fully solve the problems of traffic, accommodation, catering and other problems during the journey, giving people a sense of home, and also being very economical.

[0003] However, one of the major problems of recreational vehicles (especially the most popular C-type recreational vehicles in China) is limited space, especially the fixed-size carriages, which are generally small in activity space and poor in user experience due to various constraints. Therefore, people have designed expandable carriages, which include expansion in the width direction and expansion in the height direction. For height direction expansion, the most common method is to drive the roof up by designing a roof lifting mechanism to expand the up-down activity space in the carriage.

[0004] Most current roof lifting mechanisms use pin shafts to connect into X-shaped scissor support arm structures, such as Chinese patents CN216268926 U and CN 218316439 U. However, this structure is close to the dead point position relative to the direction of driving force in the initial state (i.e., when the two support arms are stacked close together), resulting in a small initial driving force arm of the prime mover (electric push rod, hydraulic cylinder, etc.) and a large torque to be borne, which can easily cause premature failure and damage to the structure. At the same time, the X-shaped structure has poor stability and small carrying capacity, and is prone to cause the roof of the recreational vehicle to swing and displace laterally during use, especially in windy weather, which can easily cause damage to the roof structure. Moreover, multiple power sources are used, making it difficult to control the lifting process synchronously, and the operation is cumbersome and the cost is high.

[0005] Chinese patent CN 110733401 A discloses a recreational vehicle roof lifting structure that uses a bidirectional threaded screw rod 20 to drive and a sliding table 19 to articulate a long arm 18 for lifting, thereby achieving the roof lifting function. Although this structure can achieve synchronous lifting of the four lifting mechanisms at the front and rear ends of the roof, it still has the problem of a small initial driving force arm relative to the direction of driving force in the initial state, and the motor and structural components are prone to damage, which is not very practical.

[0006] There is also a prior art in which one electric push rod is fixed at each position close to four corners of the carriage, and the roof is directly pushed by the four electric push rods to realize the roof lifting. Although the roof force is reasonable and the space occupied is small, the four push rods are difficult to control synchronously, and the four push rods are easy to interfere with each other during the roof lifting process, resulting in damage to the structure or motor, and the entire device cannot work after one motor is damaged, so there are defects of high cost and low reliability. SUMMARY

[0007] Therefore, the present application provides a motor home single power full roof lifting mechanism, which has the advantages of single power to realize the entire roof lifting, large carrying capacity, reasonable driving torque size during the entire lifting process, and the ability to realize manual and automatic operation, and can at least partially solve the problems in the prior art. In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0008] A motor home single power full roof lifting mechanism, comprising a first swing member, a second swing member, a third swing member, a fourth swing member, a first connecting member, a second connecting member, a first supporting member, a second supporting member, a guide member and a driving element;

[0009] The upper end of the first swing member is fixedly connected to the first connecting member, the first connecting member is fixedly connected to the lower end of the third swing member at positions close to both ends, both ends of the first connecting member are rotatably supported on the top of the carriage, the upper end of the third swing member is rotatably connected to the middle part of the first supporting member, the lower end of the first supporting member is rotatably connected to the guide member and can move relative to the guide member, and the upper end of the first supporting member is rotatably connected to the roof.

[0010] The upper end of the second swing member is fixedly connected to the second connecting member, the second connecting member is fixedly connected to the lower end of the fourth swing member at positions close to both ends, both ends of the second connecting member are rotatably supported on the top of the carriage, the upper end of the fourth swing member is rotatably connected to the middle part of the second supporting member, the lower end of the second supporting member is rotatably connected to the guide member and can move relative to the guide member, and the upper end of the second supporting member is rotatably connected to the roof.

[0011] The guide member is fixedly arranged on the top of the carriage, and the driving element can drive the first swing member and the second swing member to swing inward or outward at the same time.

[0012] Further, the driving element comprises a bidirectional threaded screw rod, a first nut, a second nut and a motor, the lower end of the first swing member is rotatably connected to the first nut, the first nut is threadedly connected to a first rotation direction section of the bidirectional threaded screw rod, the lower end of the second swing member is rotatably connected to the second nut, the second nut is threadedly connected to a second rotation direction section of the bidirectional threaded screw rod, and the motor is connected to one end of the bidirectional threaded screw rod.

[0013] Further, the first connecting member and the second connecting member are torsion shafts and extend through the width of the vehicle cabin, and are rotatably supported by bearings on the top of the vehicle cabin.

[0014] Further, the third swing member and the fourth swing member are parallel, and the first support member and the second support member are parallel.

[0015] Further, the upper ends of the first support member and the second support member are rotatably connected to the top cover through adapters.

[0016] Further, the lower ends of the first support member and the second support member are rotatably connected to the guide member through rolling bearings.

[0017] As a preferred embodiment, the driving element comprises a bidirectional screw rod, a first nut, a second nut, a motor and a transmission member, the lower end of the first swing member is rotatably connected to the first nut, the first nut is threadedly connected to a first rotation section of the bidirectional screw rod, the second nut is fixed to one end of the transmission member and is threadedly connected to a second rotation section of the bidirectional screw rod, the other end of the transmission member is rotatably connected to the lower end of the second swing member, and the motor is connected to one end of the bidirectional screw rod close to the first rotation section.

[0018] Further, the transmission member is a square tube, the second nut is a cuboid and is located inside the transmission member, and the axial length of the second nut is longer than that of the first nut.

[0019] Further, the motor comprises a built-in speed reducer and is slidably connected to a side wall of the vehicle cabin.

[0020] Further, the bidirectional screw rod extends through the speed reducer and has a protruding section, and a hand crank mechanism is detachably connected to the protruding section.

[0021] As a preferred embodiment, the driving element comprises a motor, a transmission member, a gear, a worm gear speed reducer, the transmission member comprises a first transmission member and a second transmission member, one end of the first transmission member and the second transmission member is rotatably connected to the lower end of the first swing member and the second swing member, respectively, the other end of the first transmission member and the second transmission member is meshed with the upper end and the lower end of the gear through a rack, respectively, and the motor drives the gear to rotate through one end of a worm shaft of the worm gear speed reducer.

[0022] Further, the other end of the worm shaft of the worm gear speed reducer extends out and is detachably connected to a hand crank mechanism.

[0023] Compared with the prior art, the present application has the following obvious advantages:

[0024] 1. Only one motor drive is needed to complete the lifting of the entire top cover, the operation is simple and convenient, the structure is simple and reliable, and the cost is low.

[0025] 2. The driving mechanism is used to drive two swing members to swing inward or outward at the same time, thereby realizing the rotation of the two torsion shafts, and finally driving the lifting of the top cover through the intermediate mechanism. The driving force arm remains basically unchanged during the entire lifting process, which is approximately the vertical height of the first swing member (or the second swing member), the driving force is reasonable, and the change is stable.

[0026] 3. It has the functions of electric lifting and manual lifting at the same time, which increases the reliability of the system and avoids the embarrassing situation that the top lifting mechanism cannot be lowered due to motor damage, thereby cannot return in the wild. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structural schematic view of the top lifting mechanism of the first embodiment of the present application when it is lifted;

[0028] Figure 2 is a structural schematic view of the top lifting mechanism of the first embodiment of the present application when it is lifted (omitting the top cover);

[0029] Figure 3 is a structural schematic view of the top lifting mechanism of the first embodiment of the present application when it is lowered (omitting the top cover);

[0030] Figure 4 is a structural schematic view of the first swing member, the third swing member and the first connecting member of the first embodiment of the present application;

[0031] Figure 5 is a structural schematic view of the second swing member, the fourth swing member and the second connecting member of the first embodiment of the present application;

[0032] Figure 6 is a partial structural schematic view of the driving element of the first embodiment of the present application;

[0033] Figure 7 is a partial structural schematic view of the driving element of the second embodiment of the present application;

[0034] Figure 8 is an exploded view of the second nut and the transmission member of the second embodiment of the present application;

[0035] Figure 9 is a structural schematic view of the driving element of the third embodiment of the present application. DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0037] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0038] Example 1: As Figures 1 to 3 As shown, a single-power full-lift roof mechanism 100 for RVs includes:

[0039] It includes a first swing member 110, a second swing member 120, a third swing member 130, a fourth swing member 140, a first connecting member 150, a second connecting member 160, a first support member 170, a second support member 180, a guide member 190, and a driving element 300.

[0040] The upper end of the first swing member 110 is fixedly connected to the first connector 150. The lower ends of the third swing member 130 are fixedly connected to the positions of the first connector 150 near both ends. The two ends of the first connector 150 are rotatably supported on the top of the carriage 500. The upper end of the third swing member 130 is rotatably connected to the middle of the first support member 170. The lower end of the first support member 170 is rotatably connected to the guide member 190 and can move relative to the guide member 190. The upper end of the first support member 170 is rotatably connected to the top cover 600.

[0041] The upper end of the second swing member 120 is fixedly connected to the second connecting member 160. The lower ends of the fourth swing member 140 are fixedly connected to the positions of the second connecting member 160 near both ends. The two ends of the second connecting member 160 are rotatably supported on the top of the carriage 500. The upper end of the fourth swing member 140 is rotatably connected to the middle of the second support member 180. The lower end of the second support member 180 is rotatably connected to the guide member 190 and can move relative to the guide member 190. The upper end of the second support member 180 is rotatably connected to the top cover 600.

[0042] The guide member 190 is fixedly installed on the top of the carriage 500, and the drive element 300 can drive the first swing member 110 and the second swing member 120 to swing inward or outward simultaneously.

[0043] It is worth noting that, in order to highlight the core technical solution of the present invention, only a portion of the carriage 500 and the roof 600 are shown as an example, and the structure has also been simplified. Figure 4 and Figure 5As shown, preferably, the first swing member 110, the third swing member 130 and the first connecting member 150 are fixed by welding, the second swing member 120, the fourth swing member 140 and the second connecting member 160 are fixed by welding, and the included angle between the first swing member 110 and the third swing member 130 is 110°~130°, preferably 112°~116°, and the included angle between the second swing member 120 and the fourth swing member 140 is 110°~130°, preferably 112°~116°.

[0044] like Figure 6 As shown, in a preferred embodiment, the drive element 300 includes a bidirectional threaded screw 310 (too long to be shown in the drawing), a first nut 320, a second nut 330, and a motor 340. The lower end of the first oscillating member 110 is rotatably connected to the first nut 320. The first nut 320 is threadedly connected to the first helical section 311 of the bidirectional threaded screw 310. The lower end of the second oscillating member 120 is rotatably connected to the second nut 330. The second nut 330 is threadedly connected to the second helical section 312 of the bidirectional threaded screw 310. The motor 340 is connected to one end of the bidirectional threaded screw 310. Force is transmitted through the bidirectional threaded screw. The structure is simple and also has a self-locking function.

[0045] Furthermore, the motor 340 includes a built-in reducer 341 and is slidably connected to one side wall inside the carriage 500. The sliding arrangement of the motor is to compensate for the slight vertical distance changes when the first swing member 110 and the second swing member 120 swing, and to avoid structural interference.

[0046] In a preferred embodiment, the bidirectional threaded screw 310 passes through the reducer 341 and has an extension 313, which is detachably connected to a hand crank mechanism. The purpose of providing a hand crank mechanism is to avoid the embarrassing situation where the lifting mechanism cannot be lowered due to motor failure, thus preventing the vehicle from returning in the field. This is because if the roof is not lowered while driving, the wind resistance is very high, posing a significant safety risk. In addition, it is often impossible to pass through height-restricted areas without the roof being lowered.

[0047] Furthermore, the first connecting member 150 and the second connecting member 160 are torsion shaft structures that extend through the width of the entire carriage 500. They are rotatably supported at both ends by bearing seats 200 on the top of the carriage 500. The bearing seats 200 are preferably sliding bearing seats to further reduce the vertical height.

[0048] Furthermore, there are two third swing members 130 arranged in parallel, two fourth swing members 140 arranged in parallel, two first support members 170 arranged in parallel, and two second support members 180 arranged in parallel.

[0049] As a preferred embodiment, the upper ends of the first support 170 and the second support 180 are respectively connected with the adapter 210 and the top cover 600, the adapter 210 is provided to facilitate modular installation, save installation and adjustment time, increase the connection strength of the top cover, and make the stress of the top cover more uniform, the adapter can be manufactured integrally or in parts, and is preferably made of aluminum alloy and provided with a plurality of lightening holes.

[0050] As a preferred embodiment, the lower ends of the first support 170 and the second support 180 are respectively provided with rolling bearings 220, and are in contact with the guide 190 through the rolling bearings 220, so as to further reduce friction, the rolling bearings 220 are preferably rubber-coated bearings, and the guide 190 is preferably divided into four separate parts, which facilitates manufacturing and installation and saves costs.

[0051] Embodiment Two: as shown in Figure 7 and Figure 8 The same parts as in Embodiment One are not described again, and the difference is that the driving element 300 further comprises a transmission member 350 (too long to be drawn), the second nut 330 is fixed to one end of the transmission member 350 and is threadedly connected with the second rotation section 312 of the bidirectional threaded screw rod 310, the other end of the transmission member 350 is rotationally connected with the lower end of the second swing member 120, the motor 340 is connected with the end of the bidirectional threaded screw rod 310 close to the first rotation section 311, this structure does not affect the force transmission, but can greatly shorten the length of the bidirectional threaded screw rod 310, and facilitates the machining and manufacturing of the bidirectional threaded screw rod.

[0052] As a preferred embodiment, the transmission member 350 is a square tube, the second nut 330 is a cuboid and is located inside the transmission member 350, the axial length of the second nut 330 is longer than that of the first nut 320, and the second nut 330 is longer to guide the bidirectional threaded screw rod and prevent deflection during force transmission.

[0053] Embodiment Three: as shown in Figure 9As shown, and the same part of example one is not described, the difference is that the driving element 300 includes a motor 340, a transmission member 350, a gear 360, a worm gear reducer 370, the transmission member 350 includes a first transmission member 351 and a second transmission member 352, one end of the first transmission member 351 and the second transmission member 352 is rotatably connected to the lower end of the first swing member 110 and the second swing member 120 respectively, the other end of the first transmission member 351 and the second transmission member 352 is engaged through the upper end and the lower end of the gear 360 respectively, the motor 340 is connected to one end of the worm shaft of the worm gear reducer 370, the gear 360 is connected to one end of the turbine shaft of the worm gear reducer 370, the motor 340 drives the gear 360 to rotate, and the gear 360 rotates at the same time to drive the first transmission member 351 and the second transmission member 352 to move inward or outward at the same time, the gear and rack mechanism is convenient for modular design, in addition, the first transmission member 351 and the second transmission member 352 can adopt a narrow square tube structure, so as to further shorten the distance between the transmission member and the side of the carriage, improve the space utilization, and adopt the worm gear reducer to reduce the speed, self-lock and facilitate the use of a hand crank mechanism.

[0054] As a preferred embodiment, the other end of the worm shaft of the worm gear reducer 370 is extended and detachably connected with a hand crank mechanism.

[0055] In addition, the driving element can also be other forms of structure, for example, using a hydraulic cylinder, a gas cylinder or an electric push rod, etc., as long as the power can be transmitted to the lower end of the first swing member and the second swing member, but since the hydraulic cylinder and the gas cylinder cannot be self-locked, the manual function cannot be realized, at the same time, the structure of the hydraulic cylinder and the gas cylinder is complex, the hydraulic oil is easy to leak, and the pneumatic also has the disadvantage of high noise, the electric push rod can be self-locked, but generally it is an integral external purchased part, and the manual function cannot be realized, therefore these schemes are not used as preferred schemes.

[0056] The working principle of the motor home single power full lifting roof mechanism of the application is as follows:

[0057] When the roof needs to be lifted, the motor drives the bidirectional threaded screw rod or the gear to rotate through the reducer, thereby driving the first swing member and the second swing member to swing inward, further driving the first support member and the second support member to rotate and ascend relative to the guide member, and finally driving the roof to ascend until reaching the maximum height.

[0058] When the roof needs to be lowered, the motor is driven in reverse, at this time the whole mechanism moves in reverse along the above-mentioned mode, which will not be described again, when the motor fails, the above-mentioned lifting and falling process can be realized manually through the hand crank mechanism, avoiding the embarrassing situation that the roof lifting mechanism cannot be lowered due to the damage of the motor and cannot return in the wild.

[0059] The lifting mechanism adopts the application, the driving force arm basically keeps unchanged during the whole lifting process, the vertical distance from the top of the carriage to the lower end of the first swing piece (or the second swing piece) is uniform, so that the driving force is reasonable and stable, and the motor and other structural members are not easy to be damaged.

[0060] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0061] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium; can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0062] The above embodiments only illustrate the basic principles and characteristics of the present application, and the present application is not limited by the above embodiments. Various changes and changes can be made without departing from the spirit and scope of the present application, and these changes and changes fall within the scope of the present application. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A motor home single power full lift roof mechanism, characterized in that, The first swing member, the second swing member, the third swing member, the fourth swing member, the first connecting member, the second connecting member, the first supporting member, the second supporting member, the guide member and the driving element are included. The upper end of the first swing member is fixedly connected with the first connecting member, the first connecting member is fixedly connected with the lower end of the third swing member at positions close to the two ends, the two ends of the first connecting member are rotatably supported on the top of the carriage, the upper end of the third swing member is rotatably connected with the middle part of the first supporting member, the lower end of the first supporting member is rotatably connected with the guide member and can move relative to the guide member, and the upper end of the first supporting member is rotatably connected with the top cover. The upper end of the second swing member is fixedly connected with the second connecting member, the second connecting member is fixedly connected with the lower end of the fourth swing member at positions close to the two ends, the two ends of the second connecting member are rotatably supported on the top of the carriage, the upper end of the fourth swing member is rotatably connected with the middle part of the second supporting member, the lower end of the second supporting member is rotatably connected with the guide member and can move relative to the guide member, and the upper end of the second supporting member is rotatably connected with the top cover. The guide member is fixedly arranged on the top of the carriage, and the driving element can drive the first swing member and the second swing member to swing inward or outward simultaneously. The first connecting member and the second connecting member are torsion shaft structures and penetrate the width direction of the whole carriage, and are rotatably supported on the top of the carriage through bearing seats at the two ends respectively. The third swing member is two and arranged in parallel, the fourth swing member is two and arranged in parallel, the first supporting member is two and arranged in parallel, and the second supporting member is two and arranged in parallel.

2. The motor home single power lift roof mechanism as described in claim 1, wherein, The driving element includes a bidirectional threaded screw rod, a first nut, a second nut and a motor, the lower end of the first swing member is rotatably connected with the first nut, the first nut is threadedly connected with a first rotation direction section of the bidirectional threaded screw rod, the lower end of the second swing member is rotatably connected with the second nut, the second nut is threadedly connected with a second rotation direction section of the bidirectional threaded screw rod, and the motor is connected with one end of the bidirectional threaded screw rod.

3. The motor home single power lift roof mechanism as described in claim 1, wherein, The upper ends of the first supporting member and the second supporting member are rotatably connected with the top cover through adapters respectively.

4. The motor home single power lift roof mechanism as described in claim 1, wherein, The lower ends of the first supporting member and the second supporting member are respectively provided with rolling bearings and are in contact with the guide member through the rolling bearings.

5. The motor home single power full lift top mechanism, as recited in claim 1, wherein, The driving element includes a bidirectional threaded screw rod, a first nut, a second nut, a motor and a transmission member, the lower end of the first swing member is rotatably connected with the first nut, the first nut is threadedly connected with a first rotation direction section of the bidirectional threaded screw rod, the second nut is fixedly arranged on one end of the transmission member and is threadedly connected with a second rotation direction section of the bidirectional threaded screw rod, the other end of the transmission member is rotatably connected with the lower end of the second swing member, and the motor is connected with one end of the bidirectional threaded screw rod close to the first rotation direction section.

6. The motor home single power lift roof mechanism of claim 5, wherein, The transmission member is a square tube, the second nut is in the shape of a cuboid and is arranged inside the transmission member, and the axial length of the second nut is longer than that of the first nut.

7. The motor home single power full lift top mechanism as described in claims 2 or 5, wherein, The motor includes a self-provided speed reducer and is slidably connected with a side wall in the carriage.

8. The motor home single power lift roof mechanism of claim 7, wherein, The bidirectional threaded screw rod penetrates the speed reducer and has a cantilever part, and a hand crank mechanism is detachably connected with the cantilever part.

9. The motor home single power full lift top mechanism, as recited in claim 1, wherein, The driving element comprises a motor, a transmission element, a gear, a worm gear reducer, the transmission element comprises a first transmission element and a second transmission element, one end of the first transmission element and the second transmission element is rotatably connected to the lower end of the first swing element and the second swing element respectively, the other end of the first transmission element and the second transmission element is engaged with the upper end and the lower end of the gear through the rack respectively, the motor drives the gear to rotate through one end of the worm gear reducer worm shaft.

10. The motor home single power full lift top mechanism as described in claim 9, wherein, The other end of the worm gear reducer worm shaft is extended and detachably connected with a hand crank mechanism.

Images