AIR INTAKE STRUCTURE FOR A VEHICLE SUNROOF

Description

TECHNICAL FIELD

[0001] The present invention belongs to the technical field of vehicle sunroofs, and particularly relates to an air intake structure for a vehicle sunroof and a recreational vehicle (RV) with a sunroof.BACKGROUND

[0002] A sunroof is provided at a top of an existing RV. The sunroof includes a base and an outer cover. A ventilation duct is formed in the base in a penetrating manner. A front end of the outer cover is hinged with a front end of the base. When the outer cover rotates upward away from the base, a carriage communicates with the outside through the ventilation duct, and the sunroof is opened. When the outer cover rotates close to the base to cover an air intake of the ventilation duct, the sunroof is closed. The patent No. CN 205097897 U provides an RV sunroof. According to the RV sunroof, an air intake of a ventilation duct directly communicates with the outside, and there is no grille shutter. Consequently, sundries and the like enter the ventilation duct and the carriage easily. On the other hand, an airflow directly impacts the ventilation duct, such that the internal structure of the sunroof is damaged easily, the airflow is unstable and the poor comfort is caused. In view of the above problem, the patent No. US 10858884 B2 provides an electric potentially-driven shade with an improved coil strength, and / or a method of making the same, and specifically discloses the following features: the foldable ventilation hole is closed. A grille shutter is hinged between the outer cover and the base. The grille shutter is located behind the base and outside the air intake of the ventilation duct. However, with a complex installation structure, the grille shutter is detached and difficult to clean. Meanwhile, the grille shutter becomes loose easily which causes a shake and an abnormal sound. US2005 / 003751A1 discloses a collapsible air vent closure. The collapsible air vent closure comprises a frame having a frame aperture. A closure is mounted to the frame for pivoting between a closed position and an open position. A movable vent wall having a vent orifice is interposed between the frame and the closure. The vent orifice provides an air flow path to the frame aperture when the closure is in the open position. The closure inhibits the air flow path to the frame aperture when the closure is in the closed position. US2018 / 105020A1 discloses a roof fan assembly. The roof fan assembly includes a cover which allows for a fan shroud to be opened. The structure includes a base clamp which connects to the roof of an RV. The base clamp includes a fan and motor which push or pull air out from the RV or into the RV. The base clamp includes a worm gear assembly which includes a worm gear structure to open and close the shroud. The arm may include a sleeve which moves relative to the arm and connects to the shroud at the opposite end. The base clamp includes mounts for connecting the base clamp to the roof as well as allowing for connection of the cover to the fan assembly as a whole. Further, the structure provides integrated hinges in the base clamp to allow connection of the shroud to the base clamp for pivotal movement. US2001 / 019217A1 discloses a sunroof for a motor vehicle having a roof with an opening. The sunroof includes a cover panel for closing the roof opening, a pair of guide rails for supporting the cover panel, a drive device for moving the cover panel vertically and horizontally with relative to the roof in a open and closed position. The sunroof also includes a shade device which can be pulled vertically to cover panel the drive device from the inside while the cover panel is in the open position. The shade device is mounted such that it is fixed with respect to a respective guide rail in a lengthwise direction relative to the roof, while the cover panel is mounted such that it can be moved in the lengthwise direction with respect to the shade device.SUMMARY

[0003] The present invention provides an air intake structure for a vehicle sunroof and an RV with a sunroof, to solve the problem of the difficult detachment of a grille shutter of an RV sunroof in the prior art.

[0004] To solve the above-mentioned technical problem, the present invention employs the following technical solutions: An air intake structure for a vehicle sunroof includes a base, an outer cover, and a grille shutter, where a front end of the base is hinged with a front end of the outer cover; a ventilation duct is formed in the base in a penetrating manner; the grille shutter is provided below a rear end of the outer cover; the grille shutter is detachably connected to the outer cover; the grille shutter is located outside an air intake of the ventilation duct; when the outer cover cooperates with the base to cover the air intake, an avoidance gap is formed between the grille shutter and the base; and when the outer cover rotates away from the base to open the air intake, the outer cover drives the grille shutter to move close to the base, the avoidance gap becomes smaller gradually, and an external airflow sequentially passes through the grille shutter, the air intake and the ventilation duct to enter a carriage of the vehicle; an end of the grille shutter close to the base is provided with a roller assembly; the roller assembly includes a rolling wheel; a track is provided on the base; and the track matches with a rotating path of the grille shutter, such that the rolling wheel abuts against the track all the time during rotation of the grille shutter; and the roller assembly further includes a rotating shaft and a connecting rod; a guide groove is formed in the grille shutter; the connecting rod includes one end slidably provided in the guide groove, and the other end connected to the rotating shaft; the rolling wheel is sleeved on the rotating shaft; and a spring is provided between an end of the connecting rod away from the rotating shaft and the guide groove.

[0005] The rolling wheel is pressed on the track all the time under an action of the spring. Through undulation of the track, a shaking space of the outer cover in opening and closing is eliminated. The roller assembly has a simple and reliable structure, a skillful design, and a stable operation.

[0006] Further, preferably, the outer cover has an opening angle of α, 0°<α≤10°. This not only ensures effective ventilation of the sunroof after the outer cover is opened, but also makes the sunroof reliable, stable, safe and aesthetically-pleasing.

[0007] Preferably, a sealing ring is provided at the air intake, and when the outer cover cooperates with the base to cover the air intake, the outer cover comes in contact with the sealing ring. This ensures sealing performance of the closed outer cover, and effectively prevents air leakage and water leakage of the sunroof.

[0008] Further, preferably, the grille shutter is detachably connected to the outer cover through bolts. This achieves a simple and reliable structure, convenient installation and detachment, and a low cost.

[0009] Further, preferably, a plurality of support rods are fixed at a bottom of the outer cover; the plurality of support rods are sequentially arranged around a periphery of the grille shutter; and the grille shutter is connected to the support rods sequentially by the bolts. This optimizes the installation structure of the grille shutter, and makes the grille shutter installed more reliably and stably.

[0010] An RV comprises a sunroof including the above cited air intake structure for a vehicle sunroof, where the base is provided at a top of the RV, and both the outer cover and the grille shutter are exposed out of the RV.

[0011] Preferably, the air intake structure of the sunroof of the RV further includes a lifting mechanism; the lifting mechanism is configured to drive the outer cover to rotate upward to open the ventilation duct or rotate downward to close the ventilation duct; the lifting mechanism includes an electric drive structure and a manual drive structure; the electric drive structure includes a threaded rod, a first cantilever, a second cantilever, and a motor; the manual drive structure includes a gear set and a handle; the threaded rod is horizontally provided on the base along a width direction of the RV and located behind the ventilation duct; a bottom end of the first cantilever is threadedly connected to the threaded rod through a first slider; a bottom end of the second cantilever is threadedly connected to the threaded rod through a second slider; a top end of the first cantilever and a top end of the second cantilever are connected to the outer cover through a supporting seat; the first cantilever intersects with the second cantilever; an output end of the motor is connected to one end of the threaded rod; the gear set includes an input end connected to the handle, and an output end connected to an end of the threaded rod away from the motor; and when the threaded rod rotates, the first cantilever and the second cantilever are driven to move close to each other or away from each other. When the outer cover is to be opened and closed manually, particularly in a power failure, there is only a need to manually rotate the handle in the RV. The handle drives the threaded rod through the gear set to rotate. The rotating threaded rod drives the first slider and the second slider to slide along the threaded rod. When the first slider and the second slider slide close to each other or away from each other, the first cantilever and the second cantilever drive the outer cover upward to open, or drive the outer cover downward to close. The gear set has stable transmission with a high transmission efficiency. Particularly compared with a flexible shaft, the transmission efficiency is improved significantly, and the manual operation is labor-saving and convenient.

[0012] Preferably, the air intake structure of the sunroof of the RV further includes an upper assembly and a lower assembly; the base, the outer cover and the grille shutter form the upper assembly; and when the outer cover closes the ventilation duct, the grille shutter is horizontally provided, and grille holes of the grille shutter gradually incline forward from bottom to top; the lower assembly includes a lower seat and a filter screen assembly; the ventilation duct penetrates through the lower seat; the filter screen assembly includes a filter screen frame and a filter screen on the filter screen frame; the filter screen frame is detachably connected to the lower seat; and the filter screen is located in the ventilation duct; and the base and the lower seat are respectively provided at an upper side and a lower side of a top plate of the RV; a bottom of the base serves as a first cylindrical portion; a top of the filter screen frame serves as a second cylindrical portion; the first cylindrical portion and the second cylindrical portion are sleeved and are capable of moving along a thickness direction of the top plate; and when the outer cover opens the ventilation duct, an outside of the RV, the grille shutter, the ventilation duct, the filter screen frame and the carriage of the RV are sequentially communicated with each other.

[0013] In response to maintenance of the filter screen assembly, the lower assembly is detached, and the filter screen assembly is detached from the lower assembly. With convenient detachment, the filter screen is repaired, maintained and cleaned conveniently in daily life. Meanwhile, since the second cylindrical portion of the filter screen frame and the first cylindrical portion of the base are sleeved, and can move along the thickness direction of the top plate, top plates with different thicknesses can be matched. That is, the top plates with the different thicknesses are matched by allowing the second cylindrical portion of the filter screen frame and the first cylindrical portion of the upper seat to move along the thickness direction of the top plate. In this case, the first cylindrical portion and the second cylindrical portion are still sleeved to allow the airflow to pass through. While achieving a skillful structure, this ensures convenient detachment of the filter screen assembly, and matches the top plates with the different thicknesses.

[0014] Further, preferably, the grille holes each have an inclination angle of β, the β being in a range of 30° to 60°. This ensures smooth connection between the grille hole and the outer cover with no obstruction and more smooth airflow in ventilation, and effectively increases a ventilation volume.

[0015] Further, preferably, the grille holes each have a cross-sectional area of S, the S being in a range of 3.0 cm 2< to 3.6 cm 2< . With the appropriate grille hole, not only is the airflow combed to become smoother and more comfortable, but also sundries, mosquitoes and the like are effectively filtered. In cooperation with the filter screen, double-layer filtration is realized to effectively prevent the mosquitoes, and make the filtered air clean and fresh. The grille shutter is more aesthetically-pleasing for a small perspective area.

[0016] Further, preferably, the lower seat is detachably connected to the top plate through a first bolt, and the filter screen frame is detachably connected to the lower seat through a second bolt. The lower assembly is detached by detaching the first bolt. By detaching the second bolt, the filter screen assembly is detached from the lower assembly. With convenient detachment, the filter screen is repaired, maintained and cleaned conveniently in daily life.

[0017] Further, preferably, a decorative cover is provided at a bottom of the lower seat, and the first bolt is fixedly connected to the decorative cover, the lower seat and the top plate in sequence. While taking protective and dustproof actions, the decorative cover is aesthetically-pleasing.

[0018] Further, preferably, a pleated blackout fabric is provided in the decorative cover; a side air vent is formed at a side of the decorative cover; and when the pleated blackout fabric is unfolded, the pleated blackout fabric covers the ventilation duct, and the side air vent communicates with the ventilation duct and the carriage of the RV. While taking an aesthetically-pleasing action, the unfolded pleated blackout fabric increases an air volume of the side air vent and changes an air-out direction. A pattern may be provided on the pleated blackout fabric to be more aesthetically-pleasing.

[0019] The present invention has the following beneficial effects: 1. According to the air intake structure for a vehicle sunroof provided by the present invention, the grille shutter is detachably connected to the outer cover. The grille shutter is installed and detached conveniently, and can be taken down conveniently for maintenance such as cleaning. The structure is simple and skillful, and the cost is low. 2. According to the air intake structure for a vehicle sunroof provided by the present invention, the roller assembly has a skillful design, a simple and reliable structure, and a stable operation. The rolling wheel is pressed on the track all the time. Through undulation of the track, a shaking space of the outer cover in opening and closing is eliminated. This effectively prevents the outer cover and the grille shutter from becoming loose or unstable, and avoids an abnormal sound. 3. According to the air intake structure for a vehicle sunroof provided by the present invention, when the outer cover is to be opened and closed manually, particularly in a power failure, there is only a need to manually rotate the handle in the RV. The handle drives the threaded rod through the gear set to rotate. The rotating threaded rod drives the first slider and the second slider to slide along the threaded rod. When the first slider and the second slider slide close to each other or away from each other, the first cantilever and the second cantilever drive the outer cover upward to open, or drive the outer cover downward to close. The gear set has stable transmission with a high transmission efficiency. Particularly compared with a flexible shaft, the transmission efficiency is improved significantly, and the manual operation is labor-saving and convenient. 4. According to the sunroof of the RV provided by the present invention, the lower assembly is detached, and the filter screen assembly is detached from the lower assembly. With convenient detachment, the filter screen is repaired, maintained and cleaned conveniently in daily life. Meanwhile, since the second cylindrical portion of the filter screen frame and the first cylindrical portion of the upper seat are sleeved, and can move along the thickness direction of the top plate, top plates with different thicknesses can be matched. That is, the top plates with the different thicknesses are matched by allowing the second cylindrical portion of the filter screen frame and the first cylindrical portion of the upper seat to move along the thickness direction of the top plate. In this case, the first cylindrical portion and the second cylindrical portion are still sleeved to allow the airflow to pass through. While achieving a skillful structure, this ensures convenient detachment of the filter screen assembly, and installs the sunroof on the top plates with the different thicknesses. 5. According to the sunroof of the RV provided by the present invention, the outer cover rotates away from the upper seat to open the ventilation duct. Meanwhile, the outer cover drives the grille shutter to move, until the outer cover is opened to a preset angle. In this case, an outside of the RV, the grille shutter, the ventilation duct, the filter screen and the carriage of the RV are sequentially communicated with each other. An external airflow of the RV sequentially passes through the grille shutter, the ventilation duct and the filter screen to enter the carriage. An internal airflow of the RV is exhausted by sequentially passing through the filter screen, the ventilation duct and the grille shutter, thereby realizing air ventilation. The grille holes gradually incline forward from bottom to top. This ensures smooth connection between the grille hole and the outer cover with no obstruction and more smooth airflow in ventilation, and effectively increases a ventilation volume. With the appropriate grille hole, not only is the airflow combed to become smoother and more comfortable, but also sundries, mosquitoes and the like are effectively filtered. In cooperation with the filter screen, double-layer filtration is realized to effectively prevent the mosquitoes, and make the filtered air clean and fresh. The grille shutter is more aesthetically-pleasing for a small perspective area. 6. According to the sunroof of the RV provided by the present invention, the grille shutter can filter the sundries, the mosquitoes and the like, and can realize double-layer filtration in cooperation with the filter screen to effectively prevent the mosquitoes, and make the filtered air clean and fresh. The grille shutter effectively prevents foreign matters from entering the sunroof and damaging the sunroof. The filter screen assembly can be detached. Particularly when the filter screen is detached for maintenance such as cleaning, the sunroof can still be used normally. The effects of the grille shutter for filtering the sundries, the mosquitoes and the like basically meet use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained according to these drawings without creative efforts. FIG. 1 is a side view of an air intake structure for a vehicle sunroof according to Embodiment 1 of the present invention, where an outer cover is closed; FIG. 2 is a side view of an air intake structure for a vehicle sunroof according to Embodiment 1 of the present invention, where an outer cover is opened; FIG. 3 is a top view of an air intake structure for a vehicle sunroof according to Embodiment 1 of the present invention; FIG. 4 is a sectional view along a direction A-A in FIG. 3; FIG. 5 is a partially enlarged view of D in FIG. 4, where an outer cover is closed; FIG. 6 is a structural stereoscopic view of an air intake structure for a vehicle sunroof according to Embodiment 1 of the present invention, where an outer cover and a lifting mechanism are not shown; FIG. 7 is a partially enlarged view of C in FIG. 6, where an outer cover is opened; FIG. 8 is a partial sectional view of C in FIG. 6, where an outer cover is opened; FIG. 9 is a structural stereoscopic view of an air intake structure for a vehicle sunroof from another perspective according to Embodiment 1 of the present invention, where an outer cover is not shown; FIG. 10 is a structural stereoscopic view of a lifting mechanism in FIG. 9; FIG. 11 is a structural stereoscopic view of a grille shutter in an air intake structure for a vehicle sunroof according to Embodiment 1 of the present invention; FIG. 12 is a structural stereoscopic view of a sunroof of an RV according to Embodiment 2 of the present invention; FIG. 13 is a side view of a sunroof of an RV according to Embodiment 2 of the present invention; FIG. 14 is an exploded view of a sunroof of an RV according to Embodiment 2 of the present invention; FIG. 15 is a further exploded view of FIG. 14; FIG. 16 is a partially enlarged view of E in FIG. 15; FIG. 17 is a structural stereoscopic view of a sunroof of an RV from another perspective according to Embodiment 2 of the present invention; FIG. 18 is a structural stereoscopic view when a filter screen assembly is detached in FIG. 17; FIG. 19 is a sectional view of a sunroof of an RV according to Embodiment 2 of the present invention; FIG. 20 is a partially enlarged view of F in FIG. 19; and FIG. 21 is a partially enlarged view of G in FIG. 19.

[0021] In the figures: 1: base, 1-1: ventilation duct, 1-2: air intake, 1-3: track, 1-4: first cylindrical portion, 2: outer cover, 3: grille shutter, 3-1: limiting groove, 3-2: guide groove, 3-3: grille hole, 4: avoidance gap, 5: air spring, 6: limiting plate, 7: sealing ring, 8: support rod, 9: roller assembly, 9-1: rolling wheel, 9-2: rotating shaft, 9-3: connecting rod, 9-4: spring, 10: lifting mechanism, 10-1: electric drive structure, 10-1-1: threaded rod, 10-1-2: first cantilever, 10-1-3: second cantilever, 10-1-4: motor, 10-1-5: first slider, 10-1-6: second slider, 10-1-7: supporting seat, 10-2: manual drive structure, 10-2-1: gear set, 10-2-3: handle, 11: upper assembly, 11-16: ventilation fan, 12: lower assembly, 12-1: lower seat, 12-2: filter screen assembly, 12-21: filter screen frame, 12-211: second cylindrical portion, 12-22: filter screen, 12-3: decorative cover, 12-31: side air vent, 12-4: pleated blackout fabric, 13: top plate, α: opening angle of outer cover, and β: inclination angle of grille hole.DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The technical solutions of the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention. Apparently, the described embodiments are merely a part rather than all of the embodiments of the present invention. The following description of at least one exemplary example is merely illustrative, and not intended to limit the present invention and application or use thereof in any way.Embodiment 1

[0023] For ease of description, a head direction is used as a front direction in the embodiment. As shown in FIGS. 1-11, an air intake structure for a vehicle sunroof includes base 1, outer cover 2, and grille shutter 3. A front end of the base 1 is hinged with a front end of the outer cover 2. Ventilation duct 1-1 is formed in the base 1 in a penetrating manner. The grille shutter 3 is provided below a rear end of the outer cover 2. The grille shutter 3 is detachably connected to the outer cover 2. The grille shutter 3 is located outside air intake 1-2 of the ventilation duct 1-1. When the outer cover 2 cooperates with the base 1 to cover the air intake 1-2, avoidance gap 4 is formed between the grille shutter 3 and the base 1. When the outer cover 2 rotates away from the base 1 to open the air intake 1-2, the outer cover 2 drives the grille shutter 3 to move close to the base 1, the avoidance gap 4 becomes smaller gradually, and an external airflow sequentially passes through the grille shutter 3, the air intake 1-2 and the ventilation duct 1-1 to enter a carriage.

[0024] In the embodiment, for convenient installation and detachment of the grille shutter 3, as shown in FIGS. 4-6, the grille shutter 3 is detachably connected to the outer cover 2 through bolts. Further, in order to optimize an installation structure of the grille shutter 3, and make the grille shutter 3 installed more reliably and stably, a plurality of support rods 8 are fixed at a bottom of the outer cover 2 in the embodiment. The plurality of support rods 8 are sequentially arranged around a periphery of the grille shutter 3. The grille shutter 3 is connected to the support rods 8 sequentially by the bolts (not shown in the figure).

[0025] In the embodiment, in order to effectively prevent the outer cover 2 and the grille shutter 3 from becoming loose or unstable, and avoid an abnormal sound, as shown in FIGS. 4-8, an end of the grille shutter 3 close to the base 1 is provided with roller assembly 9. The roller assembly 9 includes rolling wheel 9-1. Track 1-3 is provided on the base 1. The track 1-3 matches with a rotating path of the grille shutter 3, such that the rolling wheel 9-1 abuts against the track 1-3 all the time during rotation of the grille shutter 3. Specifically, in the embodiment, the roller assembly 9 further includes rotating shaft 9-2 and connecting rod 9-3. Guide groove 3-2 is formed in the grille shutter 3. The connecting rod 9-3 includes one end slidably provided in the guide groove 3-2, and the other end connected to the rotating shaft 9-2. The rolling wheel 9-1 is sleeved on the rotating shaft 9-2. Spring 9-4 is provided between an end of the connecting rod 9-3 away from the rotating shaft 9-2 and the guide groove 3-2. The rolling wheel 9-1 is pressed on the track 1-3 all the time under an action of the spring 9-4. Through undulation of the track 1-3, a shaking space of the outer cover 2 in opening and closing is eliminated, and a maximum opening angle of the outer cover 2 is limited. The roller assembly 9 has a simple and reliable structure, a skillful design, and a stable operation.

[0026] In the embodiment, in order to ensure sealing performance of the closed outer cover 2, and effectively prevent air leakage and water leakage of the sunroof, as shown in FIG. 5, sealing ring 7 is provided at the air intake 1-2. When the outer cover 2 cooperates with the base 1 to cover the air intake 1-2, the outer cover 2 comes in contact with the sealing ring 7.

[0027] In the embodiment, as shown in FIG. 4, FIG. 9 and FIG. 10, the air intake structure for a vehicle sunroof further includes lifting mechanism 10. The lifting mechanism 10 is configured to drive the outer cover 2 to rotate upward to open the ventilation duct 1-1 or rotate downward to close the ventilation duct 1-1. In the embodiment, the outer cover 2 has an opening angle of α, 0°<α≤10°. This not only ensures effective ventilation of the sunroof after the outer cover 2 is opened, but also makes the sunroof reliable, stable, safe and aesthetically-pleasing. The lifting mechanism 10 includes electric drive structure 10-1 and manual drive structure 10-2. The electric drive structure 10-1 includes threaded rod 10-1-1, first cantilever 10-1-2, second cantilever 10-1-3, and motor 10-1-4. The manual drive structure 10-2 includes gear set 10-2-1 and handle 10-2-3. The threaded rod 10-1-1 is horizontally provided on the base 1 along a width direction of an RV and located behind the ventilation duct 1-1. A bottom end of the first cantilever 10-1-2 is threadedly connected to the threaded rod 10-1-1 through first slider 10-1-5. A bottom end of the second cantilever 10-1-3 is threadedly connected to the threaded rod 10-1-1 through second slider 10-1-6. A top end of the first cantilever 10-1-2 and a top end of the second cantilever 10-1-3 are hinged to supporting seat 10-1-7. The supporting seat 10-1-7 is connected to the outer cover 2. The first cantilever 10-1-2 intersects with the second cantilever 10-1-3. An output end of the motor 10-1-4 is connected to one end of the threaded rod 10-1-1. An input end of the gear set 10-2-1 is connected to the handle 10-2-3. The handle 10-2-3 is exposed in the vehicle. An output end of the gear set 10-2-1 is connected to an end of the threaded rod 10-1-1 away from the motor 10-1-4. When the threaded rod 10-1-1 rotates, the first cantilever 10-1-2 and the second cantilever 10-1-3 are driven to move close to each other or away from each other.

[0028] An RV with a sunroof includes the air intake structure for a vehicle sunroof. The base 1 is provided at a top of the RV. Both the outer cover 2 and the grille shutter 3 are exposed out of the RV.

[0029] The working principle is as follows: The air intake structure for a vehicle sunroof is opened as follows:

[0030] The outer cover 2 rotates away from the base 1 to open the air intake 1-2. Meanwhile, the outer cover 2 drives the grille shutter 3 to move close to the base 1, the avoidance gap 4 gradually becomes smaller, and the rolling wheel 9-1 abuts against the track 1-3 all the time under an action of the spring 9-4 during rotation of the grille shutter 3. When the outer cover 2 is fixed at a certain opening angle, the rolling wheel 9-1 helps support the outer cover 2. In this case, the air intake 1-2 communicates with the outside of the carriage through the grille shutter 3. The external airflow sequentially passes through the grille shutter 3, the air intake 1-2 and the ventilation duct 1-1 to enter the carriage.

[0031] The air intake structure for a vehicle sunroof is closed as follows: The outer cover 2 rotates close to the base 1. Meanwhile, the outer cover 2 drives the grille shutter 3 to move away from the base 1. The avoidance gap 4 is gradually formed between the grille shutter 3 and the base 1. The rolling wheel 9-1 abuts against the track 1-3 all the time under an action of the spring 9-4 during rotation of the grille shutter 3, until the air intake 1-2 is covered by the outer cover 2, and the outer cover 2 is sealed by the sealing ring 7. In this case, the rolling wheel 9-1 helps support the outer cover 2.

[0032] The air intake structure for a vehicle sunroof is detached as follows: Only by screwing down the plurality of bolts between the grille shutter 3 and the support rods 8, the grille shutter 3 can be taken down. Therefore, the grille shutter 3 is installed and detached conveniently. The grille shutter 3 is taken down conveniently for maintenance such as cleaning.Embodiment 2

[0033] As shown in FIGS. 12-21, the embodiment differs from Embodiment 1 in: The air intake structure for a vehicle sunroof further includes upper assembly 11 and lower assembly 12. As shown in FIG. 14, FIG. 15, FIG. 17 and FIG. 18, the base 1, the outer cover 2 and the grille shutter 3 form the upper assembly 11. When the outer cover 2 closes the ventilation duct 1-1, the grille shutter 3 is horizontally provided, and grille holes 3-3 of the grille shutter 3 gradually incline forward from bottom to top. As shown in FIG. 14 and FIG. 15, the lower assembly 12 includes lower seat 12-1 and filter screen assembly 12-2. The ventilation duct 1-1 penetrates through the lower seat 12-1. The filter screen assembly 12-2 includes filter screen frame 12-21 and filter screen 12-22 on the filter screen frame 12-21. The filter screen frame 12-21 is detachably connected to the lower seat 12-1. The filter screen 12-22 is located in the ventilation duct 1-1. As shown in FIG. 13, FIG. 14, FIG. 19 and FIG. 21, the base 1 and the lower seat 12-1 are respectively provided at an upper side and a lower side of top plate 13 of an RV. A bottom of the base 1 serves as first cylindrical portion 1-4. A top of the filter screen frame 12-21 serves as second cylindrical portion 12-211. The first cylindrical portion 1-4 and the second cylindrical portion 12-211 are sleeved and are capable of moving along a thickness direction of the top plate 13. When the outer cover 2 opens the ventilation duct 1-1, the outside, the grille shutter 3, the ventilation duct 1-1, the filter screen 12-22 and the carriage of the RV are sequentially communicated with each other.

[0034] Further, in the embodiment, as shown in FIG. 20, the grille holes 3-3 each have an inclination angle of β, the β being in a range of 30° to 60°. The β may be 45°. This ensures smooth connection between the grille hole 3-3 and the outer cover 2 with no obstruction and more smooth airflow in ventilation, and effectively increases a ventilation volume. The grille holes 3-3 each have a cross-sectional area of S, the S being in a range of 3.0 cm 2< to 3.6 cm 2< . Optionally, the S is 3.3 cm 2< . With the appropriate grille hole 3-3, not only is the airflow combed to become smoother and more comfortable, but also sundries, mosquitoes and the like are effectively filtered. In cooperation with the filter screen 12-22, double-layer filtration is realized to effectively prevent the mosquitoes, and make the filtered air clean and fresh. The grille shutter is more aesthetically-pleasing for a small perspective area.

[0035] Further, in the embodiment, as shown in FIG. 13, FIG. 14 and FIG. 15, the lower seat 12-1 is detachably connected to the top plate 13 through a first bolt, and the filter screen frame 12-21 is detachably connected to the lower seat 12-1 through a second bolt. As shown in FIG. 13, FIG. 14, FIG. 15, FIG. 17 and FIG. 18, decorative cover 12-3 is provided at a bottom of the lower seat 12-1. The first bolt is fixedly connected to the decorative cover 12-3, the lower seat 12-1 and the top plate 13 in sequence. While taking protective and dustproof actions, the decorative cover 12-3 is aesthetically-pleasing. Pleated blackout fabric 12-4 is provided in the decorative cover 12-3. Side air vent 12-31 is formed at a side of the decorative cover 12-3. When the pleated blackout fabric 12-4 is unfolded, the pleated blackout fabric 12-4 covers the ventilation duct 1-1, and the side air vent 12-31 communicates with the ventilation duct 1-1 and the carriage of the RV. While taking an aesthetically-pleasing action, the unfolded pleated blackout fabric 12-4 increases an air volume of the side air vent 12-31 and changes an air-out direction. A pattern may be provided on the pleated blackout fabric 12-4 to be more aesthetically-pleasing.

[0036] As shown in FIG. 18, FIG. 19 and FIG. 21, ventilation fan 11-16 is provided in the base 1 in the embodiment. The ventilation fan 11-16 is located in the ventilation duct 1-1.

[0037] The filter screen assembly 12-2 is detached as follows: The lower assembly 12 is detached by detaching the first bolt. By detaching the second bolt, the filter screen assembly 12-2 is detached from the lower assembly 12. With convenient detachment, the filter screen 12-22 is repaired, maintained and cleaned conveniently in daily life. Particularly, it is to be noted that since the second cylindrical portion 12-211 of the filter screen frame 12-21 and the first cylindrical portion 1-4 of the base 1 are sleeved, and can move along the thickness direction of the top plate 13, top plates 13 with different thicknesses can be matched. That is, the top plates 13 with the different thicknesses are matched by allowing the second cylindrical portion 12-211 of the filter screen frame 12-21 and the first cylindrical portion 1-4 of the base 1 to move along the thickness direction of the top plate 13. In this case, the first cylindrical portion 1-4 and the second cylindrical portion 12-211 are still sleeved to allow the airflow to pass through.

[0038] The above described are merely preferred specific implementations of the present invention, and the protection scope of the present invention, which is defined by the appended claims, is not limited thereto.

Claims

1. An air intake structure for a vehicle sunroof, comprising a base (1), an outer cover (2), and a grille shutter (3), wherein a front end of the base (1) is hinged with a front end of the outer cover (2); a ventilation duct (1-1) is formed in the base (1) in a penetrating manner; the grille shutter (3) is provided below a rear end of the outer cover (2); the grille shutter (3) is detachably connected to the outer cover (2); the grille shutter (3) is located outside an air intake (1-2) of the ventilation duct (1-1); when the outer cover (2) cooperates with the base (1) to cover the air intake (1-2), an avoidance gap (4) is formed between the grille shutter (3) and the base (1); and when the outer cover (2) rotates away from the base (1) to open the air intake (1-2), the outer cover (2) drives the grille shutter (3) to move close to the base (1), the avoidance gap (4) becomes smaller gradually, and an external airflow sequentially passes through the grille shutter (3), the air intake (1-2) and the ventilation duct (1-1) to enter a carriage of the vehicle; characterized in that an end of the grille shutter (3) close to the base (1) is provided with a roller assembly (9); the roller assembly (9) comprises a rolling wheel (9-1); a track (1-3) is provided on the base (1); and the track (1-3) matches with a rotating path of the grille shutter (3), such that the rolling wheel (9-1) abuts against the track (1-3) all the time during rotation of the grille shutter (3); and the roller assembly (9) further comprises a rotating shaft (9-2) and a connecting rod (9-3); a guide groove (3-2) is formed in the grille shutter (3); the connecting rod (9-3) comprises one end slidably provided in the guide groove (3-2), and the other end connected to the rotating shaft (9-2); the rolling wheel (9-1) is sleeved on the rotating shaft (9-2); and a spring (9-4) is provided between an end of the connecting rod (9-3) away from the rotating shaft (9-2) and the guide groove (3-2).

2. The air intake structure for a vehicle sunroof according to claim 1, wherein the outer cover (2) has an opening angle of α, 0°<α≤10°.

3. The air intake structure for a vehicle sunroof according to claim 1, wherein a sealing ring (7) is provided at the air intake (1-2), and when the outer cover (2) cooperates with the base (1) to cover the air intake (1-2), the outer cover (2) comes in contact with the sealing ring (7).

4. The air intake structure for a vehicle sunroof according to any one of claims 1 to 3, wherein the grille shutter (3) is detachably connected to the outer cover (2) through bolts.

5. The air intake structure for a vehicle sunroof according to claim 4, wherein a plurality of support rods (8) are fixed at a bottom of the outer cover (2); the plurality of support rods (8) are sequentially arranged around a periphery of the grille shutter (3); and the grille shutter (3) is connected to the support rods (8) sequentially by the bolts.

6. A recreational vehicle (RV) with a sunroof comprising the air intake structure for a vehicle sunroof according to any one of claims 1 to 5, wherein the base (1) is provided at a top of the RV, and both the outer cover (2) and the grille shutter (3) are exposed out of the RV.

7. The RV with a sunroof according to claim 6, wherein the air intake structure for the vehicle sunroof further comprises a lifting mechanism (10); the lifting mechanism (10) is configured to drive the outer cover (2) to rotate upward to open the ventilation duct (1-1) or rotate downward to close the ventilation duct (1-1); the lifting mechanism (10) comprises an electric drive structure (10-1) and a manual drive structure (10-2); the electric drive structure (10-1) comprises a threaded rod (10-1-1), a first cantilever (10-1-2), a second cantilever (10-1-3), and a motor (10-1-4); the manual drive structure (10-2) comprises a gear set (10-2-1) and a handle (10-2-3); the threaded rod (10-1-1) is horizontally provided on the base (1) along a width direction of the RV and located behind the ventilation duct (1-1); a bottom end of the first cantilever (10-1-2) is threadedly connected to the threaded rod (10-1-1) through a first slider (10-1-5); a bottom end of the second cantilever (10-1-3) is threadedly connected to the threaded rod (10-1-1) through a second slider (10-1-6); a top end of the first cantilever (10-1-2) and a top end of the second cantilever (10-1-3) are connected to the outer cover (2) through a supporting seat (10-1-7); the first cantilever (10-1-2) intersects with the second cantilever (10-1-3); an output end of the motor (10-1-4) is connected to one end of the threaded rod (10-1-1); the gear set (10-2-1) comprises an input end connected to the handle (10-2-3), and an output end connected to an end of the threaded rod (10-1-1) away from the motor (10-1-4); and when the threaded rod (10-1-1) rotates, the first cantilever (10-1-2) and the second cantilever (10-1-3) are driven to move close to each other or away from each other.

8. The RV with a sunroof according to claim 6, wherein the air intake structure for the vehicle sunroof further comprises an upper assembly (11) and a lower assembly (12); the base (1), the outer cover (2) and the grille shutter (3) form the upper assembly (11); and when the outer cover (2) closes the ventilation duct (1-1), the grille shutter (3) is horizontally provided, and grille holes (3-3) of the grille shutter (3) gradually incline forward from bottom to top; the lower assembly (12) comprises a lower seat (12-1) and a filter screen assembly (12-2); the ventilation duct (1-1) penetrates through the lower seat (12-1); the filter screen assembly (12-2) comprises a filter screen frame (12-21) and a filter screen (12-22) on the filter screen frame (12-21); the filter screen frame (12-21) is detachably connected to the lower seat (12-1); and the filter screen (12-22) is located in the ventilation duct (1-1); and the base (1) and the lower seat (12-1) are respectively provided at an upper side and a lower side of a top plate (13) of the RV; a bottom of the base (1) serves as a first cylindrical portion (1-4); a top of the filter screen frame (12-21) serves as a second cylindrical portion (12-211); the first cylindrical portion (1-4) and the second cylindrical portion (12-211) are sleeved and are capable of moving along a thickness direction of the top plate (13); and when the outer cover (2) opens the ventilation duct (1-1), an outside of the RV, the grille shutter (3), the ventilation duct (1-1), the filter screen (12-22), and the carriage of the RV are sequentially communicated with each other.

9. The RV with a sunroof according to claim 8, wherein the grille holes (3-3) each have an inclination angle of β, the β being in a range of 30° to 60°.

10. The RV with a sunroof according to claim 8 or 9, wherein the grille holes (3-3) each have a cross-sectional area of S, the S being in a range of 3.0 cm2 to 3.6 cm2.

11. The RV with a sunroof according to claim 8, wherein the lower seat (12-1) is detachably connected to the top plate (13) through a first bolt, and the filter screen frame (12-21) is detachably connected to the lower seat (12-1) through a second bolt.

12. The RV with a sunroof according to claim 11, wherein a decorative cover (12-3) is provided at a bottom of the lower seat (12-1), and the first bolt is fixedly connected to the decorative cover (12-3), the lower seat (12-1) and the top plate (13) in sequence.

13. The RV with a sunroof according to claim 12, wherein a pleated blackout fabric (12-4) is provided in the decorative cover (12-3); a side air vent (12-31) is formed at a side of the decorative cover (12-3); and when the pleated blackout fabric (12-4) is unfolded, the pleated blackout fabric (12-4) covers the ventilation duct (1-1), and the side air vent (12-31) communicates with the ventilation duct (1-1) and the carriage of the RV.