Roof ventilation system

Abstract

A roof ventilation system comprises a ventilation plate (11) rigidly fixed to an actuator (13) and a rotary hinge (16) and capable of tilting relative to a base plate (17) and driven under the condition of a servo motor (14) outputting torque. The system comprises the following technical points: a gear (134) is provided at the output end of the servo motor (14); a plurality of ventilation openings (171) are provided at intervals along the transverse direction of the base plate (17); the actuator (13) comprises a ventilation plate bracket (135) for fixing the ventilation plate (11); a fixing bracket (131) for fixing the base plate (17); a U-shaped rotating arm (132) driven by the servo motor (14) to rotate around the fixing bracket (131); and a support arm (133) fitted between the U-shaped rotating arm (132) and the ventilation plate bracket (135) via a double pivot shaft. The system has the advantages of simple and compact structure, high ventilation efficiency, and reduced wind noise.

Description

Technical Field

[0001] The invention relates to a ventilation structure of an automobile roof, in particular to a roof ventilation system. Background Art

[0002] Existing panoramic sunroof systems for automobiles, such as the one disclosed in utility model patent publication number CN204605475U, employ a technical solution. As described in paragraph 0038 of the specification, to achieve ventilation, the drive motor assembly 8 is activated to drive the first sunroof glass 2, which first tilts up and then moves rearward along the slide rails 4 a certain distance, achieving ventilation similar to a small sunroof.

[0003] However, it's obvious that this ventilation method primarily utilizes the principle of negative pressure ventilation. Based on aerodynamics, the rapid flow of air over the roof creates negative pressure inside the car while the car is in motion, drawing out stale air and allowing fresh air to flow in through the air intakes. Compared to side window ventilation, this method also reduces wind noise.

[0004] To further reduce wind noise, Huang Lei, in his article "Research on Wind Bounce Problems in Automotive Sunroofs," reported that reducing the sunroof glass opening in headwind conditions significantly reduced the sound pressure level (30dB), addressing the wind buffeting issue. To meet passengers' ventilation needs with a wide opening, a mesh windshield was used when the glass was open, also mitigating wind buffeting in headwind conditions. However, as shown in Tables 1 and 2 of the article, at speeds of 50 km / h and 112 km / h, the windshield still generated significant wind noise when the glass was fully or partially open.

[0005] It can be seen that the ventilation effect of the existing technical solution using only the top opening is still limited, and the noise reduction effect is not ideal. Summary of the Invention

[0006] The purpose of the present invention is to provide a roof ventilation system that fundamentally solves the above problems and has the advantages of simple and compact structure, high ventilation efficiency and lower wind noise.

[0007] To achieve the above objectives, the present invention provides the following technical solution: The roof ventilation system includes a ventilation panel rigidly fixed to an actuator and a rotary hinge, which can be driven by the output torque of a servo motor and can be tilted relative to the base plate. The technical key points are:

[0008] The output end of the servo motor is provided with a gear;

[0009] When the ventilation plate is at the lowest raised position, the ventilation plate and the bottom plate are sealed by a sealing strip fixed on the bottom plate;

[0010] A plurality of ventilation holes are arranged at intervals along the horizontal direction along the upper edge of the bottom plate;

[0011] The actuator includes a ventilation plate bracket for fixing the ventilation plate, a fixing bracket for fixing the base plate, a U-shaped rotating arm driven by a servo motor to rotate around the fixing bracket, and a support arm fitted between the U-shaped rotating arm and the ventilation plate bracket with a double pivot axis;

[0012] The support arm is a bar-shaped structure, with an upper pivot hole for pivotally cooperating with the ventilation plate bracket and a lower pivot hole for pivotally cooperating with the U-shaped arm at both ends;

[0013] The U-shaped rotating arm is composed of a connecting portion, a vertical wall portion, and a driving portion to form a U-shaped structure. The driving portion is provided with a gear hole that cooperates with the gear. The connecting portion is provided with a rotating arm pivot hole coaxial with the gear hole and a support arm mounting hole that pivots with the support arm. A rotating arm protrusion is provided on the side of the support arm mounting hole.

[0014] The fixing bracket is provided with a rotating arm fixing hole coaxially matched with the rotating arm pivot hole, and a bracket protrusion is provided on the side of the rotating arm fixing hole, the plane of which intersects with the vertical plane of the fixing bracket;

[0015] The servo motor drives the U-shaped swing arm to rotate through gears. When the support arm mounting hole is above the swing arm pivot hole, the U-shaped swing arm is in the first working position. At this time, the lower surface of the swing arm protrusion is supported and limited by the upper surface of the bracket protrusion; when the support arm mounting hole is below the swing arm pivot hole, the U-shaped swing arm is in the second working position. At this time, the upper surface of the swing arm pivot hole is supported and limited by the lower surface of the bracket protrusion.

[0016] Furthermore, when the U-shaped pivot arm is located in the first or second working position, the line connecting the upper pivot hole and the lower pivot hole coincide with each other as a baseline; when the U-shaped pivot arm rotates from the first working position to the second working position, the lower end point of the line connecting the upper pivot hole and the lower pivot hole first leaves the baseline and moves toward the away side of the bracket protrusion, and then returns to the baseline.

[0017] Furthermore, the servo motor is fixed to the base plate through a motor bracket.

[0018] Furthermore, the plane where the bracket protrusion is located is perpendicular to the vertical plane.

[0019] The present invention also provides a car roof adopting the above-mentioned roof ventilation system, the technical key points of which are: it includes a front windshield, a roof glass, and a rear windshield arranged in sequence, and the technical key points are: the roof ventilation system is located between the front windshield and the roof glass or between the roof glass and the rear windshield.

[0020] The beneficial effects of the present invention are as follows: when a fixed panoramic sunroof is used as the roof glass, large-caliber ventilation and air exchange can be achieved by opening the ventilation panels of the roof ventilation system located in front of or behind the roof glass.

[0021] When the roof glass uses an openable sliding panoramic sunroof (the roof ventilation system is located behind the roof glass), open the roof ventilation system and the roof glass at the same time, part of the airflow flows backward along the ventilation plate of the roof ventilation system close to the roof glass; part of the airflow enters the car from the front opening of the roof glass, and then flows out from the vents on the bottom plate, thereby achieving complete ventilation of the air inside the car while reducing wind resistance and wind noise, effectively improving the ventilation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural schematic diagram of one embodiment of the present invention in use.

[0023] Figure 2 This is a structural diagram of another embodiment of the present invention in use.

[0024] Figure 3 Schematic diagram of the exploded structure of the roof ventilation system of the present invention.

[0025] Figure 4 It is a schematic diagram of the isometric side view of the bottom plate of the present invention.

[0026] Figure 4a for Figure 4 Schematic diagram of the locally enlarged structure of part A.

[0027] Figure 4b for Figure 4 Schematic diagram of the locally enlarged structure of part B.

[0028] Figure 5 This is an isometric structural schematic diagram of the ventilation plate of the present invention.

[0029] Figure 5a for Figure 5 Schematic diagram of the locally enlarged structure of part C.

[0030] Figure 6 It is a schematic cross-sectional structural diagram of the roof ventilation system of the present invention.

[0031] Figure 7 It is an isometric structural schematic diagram of the actuator of the present invention.

[0032] Figure 7a for Figure 7 Schematic diagram of the decomposition structure.

[0033] Figure 8 Schematic diagram of two working states of the present invention.

[0034] Figure 9 This is a schematic diagram of the operating principle of the actuator on one side of the present invention. DETAILED DESCRIPTION

[0035] The following combination Figures 1 to 9 , the specific contents of the present invention are described in detail through specific embodiments. Example 1

[0036] like Figure 1 、 Figure 3 As shown, the roof ventilation system 1 is typically installed at the front end of the roof glass 3, adjacent to the front windshield 2. Specifically, the roof ventilation system 1 includes a base plate 17 fixed to the roof frame (not shown), a ventilation plate 11 that can be tilted relative to the base plate 17, a sealing strip 12 located between the ventilation plate 11 and the base plate 17, an actuator 13 for driving the ventilation plate 11 relative to the base plate 17, and a servo motor 14 that outputs torque to the actuator 13. Figure 3 、 Figure 4 、 Figure 4a 、 Figure 4b As shown, the bottom plate 17 is provided with one or more vents 171 arranged in the transverse direction of the vehicle, the bottom plate 17 is provided with slots on both sides for installing the actuator 13, and the front end of the bottom plate 17 is provided with grooves on both sides for installing the rotary hinge 16. Figure 6 As shown, the sealing strip 12 surrounds the ventilating plate 11 to form an annular closed space.

[0037] like Figure 5 、 Figure 5a As shown, the front end of the vent panel 11 is pivotally mounted on a base plate 17 via a rotary hinge 16, with a sealing strip 12 disposed therebetween, the bottom of which is fixed to the base plate 17. When the vent panel 11 is opened, the vent panel 11 moves away from the sealing strip 12, and the vent panel 11 pivots with the rotating shaft 161 via its connecting lug 111. The rear end of the vent panel 11 is rigidly fixed to the horizontal mounting surface of the vent panel bracket 135 of the actuator 13, and can be tilted relative to the base plate 17 by the actuator 13 under the drive of the servo motor 14.

[0038] like Figure 7 、 Figure 7aAs shown, the actuator 13 preferably adopts a pair of symmetrical structures and positions. Taking the actuator 13 on the left side of the vehicle as an example, the actuator 13 includes a fixing bracket 131 for fixing the base plate 17, a U-shaped rotating arm 132, a support arm 133, and a ventilation plate bracket 135 for fixing the ventilation plate 11, which are arranged in sequence. Among them, the U-shaped rotating arm 132 is driven by the servo motor 14 by outputting torque thereto. The output shaft of the servo motor 14 is rigidly connected to the gear 134, and the gear 134 can be embedded in the gear hole 1323 of the U-shaped rotating arm 132. The U-shaped rotating arm 132 adopts a bending structure to separate the plane where the connecting part 1326 is located from the upper half of the support arm 133, reserving installation space for the first rivet 1361. During operation, the servo motor 14 outputs torque to drive the gear 134 at its output end. Gear 134 drives the U-shaped arm 132 to rotate about the axis of the second rivet 1362, thereby driving the support arm 133 and the ventilation plate bracket 135 to rise and fall, ultimately achieving the raising and lowering of the ventilation plate 11. Because the bottom of the line connecting the upper pivot hole 1332 and the lower pivot hole 1331 of the support arm 133 moves away from the bracket protrusion 1312 during the raising and lowering of the support arm 133, the resistance to the ventilation plate 11 when it is lifted and lowered is effectively reduced.

[0039] The fixing bracket 131 includes an upper mounting surface 1313 and a vertical surface 1314 intersecting in the same plane, a bracket protrusion 1312 intersecting with both the upper mounting surface 1313 and the vertical surface 1314 , and a rotating arm fixing hole 1311 whose axis hole is perpendicular to the vertical surface 1314 .

[0040] The U-shaped pivot arm 132 comprises a U-shaped main structure consisting of a connecting portion 1326, a vertical wall portion 1325, and a driving portion 1327. The connecting portion 1326 and the driving portion 1327 are located in parallel planes. The connecting portion 1326 is provided with a pivot hole 1322 coaxial with the pivot arm fixing hole 1311, which is pivoted by a second rivet 1362. The driving portion 1327 is provided with a gear hole 1323 coaxial with the pivot hole 1322 and the pivot arm fixing hole 1311. A pivot arm protrusion 1324 is provided on the connecting portion 1326 on the side opposite the bracket protrusion 1312, located on the plane of the connecting portion 1326. The connecting portion 1326 is also provided with a support arm mounting hole 1321 for connecting to the support arm 133. The vertical wall portion 1325 and the rotating arm protrusion 1324 serve as the starting and ending travel limit structures of the fixed bracket 131, so that they are respectively in contact with the lower surface and the upper surface of the bracket protrusion 1312 when the actuator 13 is in the closed position and the open position.

[0041] The support arm 133 includes a strip-shaped main board, on which an upper pivot hole 1332 for pivoting the ventilation plate bracket 135 and the first rivet 1361 is provided, and a lower pivot hole 1331 for pivoting with the support arm mounting hole 1321 of the U-shaped rotating arm 132 and the third rivet 1363 is provided.

[0042] The ventilation plate bracket 135 includes an angled sheet-like body, the upper mounting plane of which is linked to the upper mounting surface 1313 of the fixed bracket 131 , and a bracket mounting through hole 1351 pivotally matched with the upper pivot hole 1332 is provided on its vertical surface.

[0043] like Figure 8 、 Figure 9 As shown, when the servo motor 14 drives the U-shaped rotating arm 132 to rotate in the forward direction, the U-shaped rotating arm 132 pushes the support arm 133 upward, thereby driving the ventilation plate 11 fixed to the support arm 133 to tilt. When the ventilation plate 11 tilts, the vents 171 preset on the bottom plate 17 connect the interior and exterior of the vehicle, realizing air circulation and ventilation.

[0044] Similarly, when the servo motor 14 drives the U-shaped rotating arm 132 to reverse, the U-shaped rotating arm 132 retracts the support arm 133 downward, thereby driving the ventilation plate 11 fixed on the support arm 133 to descend and close, and maintain a seal with the sealing strip 12, isolating the vent 171 on the ventilation plate 11 from the outside of the vehicle. Example 2

[0045] like Figure 2 As shown, the roof ventilation system 1 can also be arranged at the rear end of the roof glass 3, adjacent to the rear windshield 4. The structure of the roof ventilation system 1 is the same as that of the first embodiment.

[0046] 1 Roof ventilation system, 11 Ventilation panel, 111 Connecting ear, 12 Sealing strip, 13 Actuator, 131 Fixing bracket, 1311 Rotating arm fixing hole, 1312 Bracket protrusion, 1313 Upper mounting surface, 1314 Vertical surface, 132 U-shaped rotating arm, 1321 Support arm mounting hole, 1322 Rotating arm pivot hole, 1323 Gear hole, 1324 Rotating arm protrusion, 1325 Vertical wall portion, 1326 Connecting portion, 1327 Driving portion, 133 Support arm, 1331 Lower pivot hole, 1332 Upper pivot hole, 134 Gear, 135 Ventilation panel bracket, 1351 Bracket mounting through hole, 1361 First rivet, 1362 Second rivet, 1363 Third rivet, 14 Servo motor, 15 Motor bracket, 16 Rotary hinge, 161 shaft, 17 base plate, 171 vents;

[0047] 2 front windshield;

[0048] 3. Roof glass;

[0049] 4 Rear windshield.

Claims

1. A roof ventilation system comprising a ventilation panel (11) rigidly fixed to an actuator (13) and a rotary hinge (16) and capable of tilting relative to a base plate (17), which is drivable under the condition of a servo motor (14) outputting torque, and characterized in that: The output end of the servo motor (14) is provided with a gear (134); When the ventilation plate (11) is at the lowest tilted position, the ventilation plate (11) and the bottom plate (17) are sealed by a sealing strip (12) fixed on the bottom plate (17); A plurality of ventilation openings (171) are provided at intervals along the bottom plate (17); The actuator (13) includes a ventilation plate bracket (135) for fixing the ventilation plate (11), a fixing bracket (131) for fixing the base plate (17), a U-shaped rotating arm (132) driven by a servo motor (14) to rotate around the fixing bracket (131), and a support arm (133) fitted between the U-shaped rotating arm (132) and the ventilation plate bracket (135) with a double pivot axis. The support arm (133) is a strip-shaped structure, and its two ends are respectively provided with an upper pivot hole (1332) for pivotally cooperating with the ventilation plate bracket (135) and a lower pivot hole (1331) for pivotally cooperating with the U-shaped pivot arm (132); The U-shaped rotating arm (132) is composed of a connecting portion (1326), a vertical wall portion (1325), and a driving portion (1327) to form a U-shaped structure. The driving portion (1327) is provided with a gear hole (1323) that cooperates with the gear (134). The connecting portion (1326) is provided with a rotating arm pivot hole (1322) coaxial with the gear hole (1323) and a support arm mounting hole (1321) that pivots with the support arm (133). A rotating arm protrusion (1324) is provided on the side of the support arm mounting hole (1321). The fixed bracket (131) is provided with a rotating arm fixing hole (1311) coaxially matched with the rotating arm pivot hole (1322), and a bracket protrusion (1312) is provided on the side of the rotating arm fixing hole (1311) whose plane intersects with the vertical surface (1314) of the fixed bracket (131); The servo motor (14) drives the U-shaped rotating arm (132) to rotate via the gear (134). When the support arm mounting hole (1321) is located above the rotating arm pivot hole (1322), the U-shaped rotating arm (132) is in a first working position, at which time the lower surface of the rotating arm protrusion (1324) is supported and limited by the upper surface of the bracket protrusion (1312); when the support arm mounting hole (1321) is located below the rotating arm pivot hole (1322), the U-shaped rotating arm (132) is in a second working position, at which time the upper surface of the rotating arm pivot hole (1322) is supported and limited by the lower surface of the bracket protrusion (1312).

2. The roof ventilation system according to claim 1, characterized in that: When the U-shaped rotating arm (132) is located at the first or second working position, the line connecting the upper pivot hole (1332) and the lower pivot hole (1331) coincides with each other as a baseline; when the U-shaped rotating arm (132) rotates from the first working position to the second working position, the lower end point of the line connecting the upper pivot hole (1332) and the lower pivot hole (1331) first leaves the baseline and moves toward the side away from the bracket protrusion (1312), and then returns to the baseline.

3. The roof ventilation system according to claim 1 or 2, characterized in that: The servo motor (14) is fixed on the base plate (17) via a motor bracket (15).

4. The roof ventilation system according to claim 1 or 2, characterized in that: The plane where the bracket protrusion (1312) is located is perpendicular to the vertical surface (1314).

5. A car roof using the roof ventilation system according to claim 1, characterized in that: The invention comprises a front windshield (2), a roof glass (3), and a rear windshield (4) which are arranged in sequence, and is characterized in that the roof ventilation system (1) is located between the front windshield (2) and the roof glass (3) or between the roof glass (3) and the rear windshield (4).

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