Motor home ventilator and motor home using same

Abstract

The utility model relates to a motor home ventilator and a motor home using the same, and relates to the field of motor home supplies, the motor home ventilator comprises a carriage and a ventilator arranged on the carriage, the ventilator comprises an upper shell, a middle shell, a lower shell, a fan assembly and a driving assembly used for opening an upper cover, the driving assembly adopts a worm gear reducer to drive a plurality of rocker arms to turn over or close the upper shell. The rocker arm shaft is driven to rotate through the worm and gear reducer, the rocker arms are installed on the rocker arm shaft, and the rocker arms are consistent in speed and force when the upper shell is jacked up, so that the driving assembly can provide support for the upper shell more stably.

Description

Technical Field

[0001] The utility model relates to the field of recreational vehicle supplies, in particular to a recreational vehicle ventilation fan and a recreational vehicle using the ventilation fan. Background Art

[0002] An RV is a special vehicle that has both beds, kitchen utensils and other household appliances as well as the functions of a travel vehicle. The RV ventilation fan is an important component in the RV ventilation system. It is mainly used to adjust the air humidity and temperature in the car and eliminate odor, moisture and harmful gases. The RV ventilation fan is usually installed on the roof and uses the fan to introduce external air into the car, thereby realizing air circulation in the car and improving the living environment inside the RV.

[0003] At present, a Chinese utility model patent application with authorization announcement number CN206690835U and publication date December 1, 2017 proposes a ventilation fan for RVs, including an outer frame located outside the RV roof and an inner frame located inside the RV roof and connected to the outer frame, and a flip cover hinged on the outer frame, a cross bar is provided on the frame opening of the outer frame, a motor and a flip cover opening mechanism are installed on the cross bar, a fan blade is installed on the motor, a control switch of the motor is installed on the inner frame, and the flip cover mechanism includes a worm shaft, a gear lever connected to the worm shaft in driving manner, and a protrusion arranged on the inner surface of the flip cover.

[0004] When in use, the ventilation fan is installed on the roof of the RV through the outer frame and the inner frame, and the size of the flap opening is adjusted by controlling the flap mechanism. The start and stop of the motor is controlled by the control switch. The flap mechanism drives the gear lever to rotate by controlling the rotation of the worm shaft. When the gear lever rotates, the other end of the gear lever slides on the inner surface of the flap to lift the flap.

[0005] With regard to the above-mentioned related technologies, the flip cover is supported only by a gear lever connected to the worm shaft, which makes the support of the flip cover unstable. When the flip cover is subjected to uneven force, it is easy to cause the gear lever to deform or even cause the gear lever and the worm shaft to disengage, thus affecting the normal use of the flip cover mechanism. Utility Model Content

[0006] In order to improve the stability of the supporting structure and the flap of the ventilation fan when the flap is opened, the utility model provides a recreational vehicle ventilation fan and a recreational vehicle using the ventilation fan.

[0007] Aspect 1: The utility model provides a motorhome ventilation fan, which adopts the following technical solution:

[0008] A motorhome ventilation fan comprises: an upper shell, a middle shell, a lower shell and a fan assembly, the middle shell and the lower shell are fixedly connected, one side of the upper shell and the side of the middle shell are rotatably connected, the fan assembly is fixedly installed on the middle shell, and a driving assembly is also arranged between the upper shell and the middle shell, the driving assembly comprises a power source, a worm gear reducer, a rocker arm shaft, a plurality of rocker arms and guide plates corresponding to the rocker arms one by one, the worm gear reducer is fixedly installed on the middle shell, the rocker arm shaft is rotatably arranged on the middle shell, the rocker arm shaft is parallel to the rotating axis between the upper shell and the middle shell, and the rocker arm shaft is drivingly connected to the output shaft of the worm gear reducer, the power source is drivingly connected to the input shaft of the worm gear reducer, one end of the rocker arm is fixedly connected to the rocker arm shaft, and the other end of the rocker arm is slidably arranged on the corresponding guide plate, the guide plate is fixedly arranged on the inner wall of the upper shell, and the plurality of rocker arms are parallel to each other.

[0009] By adopting this technical solution, when the input shaft of the worm gear reducer is driven to rotate, the worm gear reducer can convert the rotation of the input shaft into the rotation of the output shaft, and the output shaft will drive the rocker shaft to rotate. The multiple rocker arms fixedly connected to the rocker shaft will rotate uniformly around the rocker axis under the rotation of the rocker shaft, and the other end of the rocker arm will slide in the corresponding guide plate and push the guide plate upward, thereby turning over the upper shell. In this way, the rocker shaft is driven to rotate by the worm gear reducer, and multiple rocker arms parallel to each other are installed on the rocker shaft. The speed and force of the multiple rocker arms are consistent when lifting the upper shell, which can provide more stable support for the upper shell, and the self-locking effect of the worm gear reducer enables the rocker arm to more stably support the upper shell at the current opening.

[0010] Optionally, the power source is a lifting handle, which is drivingly connected to the input shaft of the worm gear reducer; or the power source is a drive motor, the output shaft of the drive motor is drivingly connected to the input shaft of the worm gear reducer, and the drive motor is fixedly mounted on the lower shell.

[0011] By adopting this technical solution, the lifting handle or the driving motor can be used to input power to the worm gear reducer. When the motor is used as the power source, the opening of the flap can be controlled by one button, which is convenient to operate. When the lifting handle is used as the power source, the opening of the flap can be manually adjusted without electricity, that is, the flap can be flexibly adjusted at any time without considering power issues.

[0012] Optionally, the inner wall of the upper shell is further provided with reinforcing ribs, and the guide plate is fixedly mounted on the reinforcing ribs.

[0013] By adopting this technical solution, the guide plate and the reinforcing ribs are connected by screws. The reinforcing ribs can increase the connection strength between the guide plate and the upper shell, and reduce the deformation of the upper shell caused by insufficient connection strength between the upper shell and the guide plate when the drive assembly supports the upper shell.

[0014] Optionally, the lower shell includes a lower shell inner frame and a gauze assembly, the lower shell inner frame and the middle shell are fixedly connected, the lower shell inner frame is provided with an opening, the gauze assembly is covered on the opening, a clamping hole is provided on the opening side wall of the lower shell inner frame, the gauze assembly includes a gauze body and a gauze outer frame, the gauze body is fixedly arranged in the opening portion of the gauze outer frame, a bayonet is provided on one side of the gauze outer frame, the bayonet is inserted in the bayonet hole, and a locking assembly is provided on the side of the gauze outer frame away from the bayonet and is connected to the lower shell inner frame through the locking assembly.

[0015] By adopting this technical solution, the gauze assembly is fixed to the inner frame of the lower shell using a pin and a locking assembly, so that the gauze assembly can be quickly disassembled and assembled on the inner frame of the lower shell, making it convenient to quickly replace the gauze and facilitate subsequent cleaning and replacement of the gauze.

[0016] Optionally, the locking assembly includes a pendulum block, a fastening pin, a cylindrical pin and a spring, the fastening pin is slidably arranged on the mesh outer frame, the pendulum block includes a cam portion and a hand-held portion, the hand-held portion is fixedly connected to the cam portion, one end of the fastening pin is rotatably connected to the cam portion through the cylindrical pin, the outer peripheral surface of the cam portion is in contact with the inner wall of the mesh outer frame, one end of the spring is connected to the fastening pin, and the other end is connected to the mesh outer frame, and the spring has a tendency to cause the fastening pin to extend outward.

[0017] By adopting this technical solution, when the cam portion of the swing block rotates to a position where the cylindrical pin is close to the inner wall of the gauze outer frame, the spring is in a released state, and the fastening pin moves in a direction away from the swing block under the action of the spring. At this time, the end of the fastening pin extends out of the side of the gauze outer frame and is inserted into the socket of the lower shell inner frame to fix the gauze assembly; when the cam portion of the swing block rotates to a position where the cylindrical pin is far away from the inner wall of the gauze outer frame, the spring is compressed, and the fastening pin moves in a direction close to the swing block under the pulling force of the swing block. At this time, the end of the fastening pin does not extend out of the side of the gauze assembly, and the fastening pin cannot be inserted into the socket of the lower shell inner frame, and the gauze assembly can be taken out from the lower shell inner frame. In this way, by rotating the swing block, the fastening pin can be controlled to be inserted into the socket of the lower shell inner frame to fix the gauze assembly or the fastening pin can be controlled to be pulled out from the socket of the lower shell inner frame to remove the gauze assembly, thereby realizing the rapid installation and disassembly of the gauze assembly in the lower shell inner frame, and simplifying the operation of disassembling and assembling the gauze assembly.

[0018] Optionally, the middle shell includes a frame and a support beam, the frame is fixedly connected to the lower shell, the support beam is arranged in the middle opening of the frame, the cross-section of the support beam is U-shaped, and the fan assembly is fixedly mounted on the support beam.

[0019] By adopting this technical solution, setting the support beam to a U-shaped structure can improve the rigidity of the support beam, enhance the stability of the fan assembly when rotating, and reduce the resonance generated when the fan assembly is working, thereby reducing noise.

[0020] Optionally, the fan assembly includes a motor and a blade assembly, the motor is fixedly mounted on the support beam, the blade assembly includes an integral blade body and a multi-tooth connecting shaft, the multi-tooth connecting shaft passes through the blade body, the multi-tooth connecting shaft and the blade body are coaxially arranged, and the multi-tooth connecting shaft is coaxially arranged with the output shaft of the motor.

[0021] By adopting this technical solution, using a multi-tooth connecting shaft to connect the output shaft of the motor and the fan blade body can increase the connection strength between the fan blade body and the motor output shaft, improve the dynamic balance performance of the fan blade assembly, reduce the swing of the fan assembly during operation, and reduce the probability of the fan blades scratching other parts of the ventilation fan.

[0022] Optionally, the fan assembly further comprises a shaft retaining ring, a groove is provided at the end of the output shaft of the motor, the shaft retaining ring is installed in the groove at the end of the output shaft of the motor, and one end face of the shaft retaining ring abuts against the end face of the multi-tooth connecting shaft away from the motor.

[0023] By adopting this technical solution, the fan assembly can be limited in axis by using a shaft retaining ring that is clamped on the end of the motor output shaft and the surface of the multi-tooth connecting shaft, thereby reducing the probability of relative displacement between the shaft retaining ring and the motor output shaft, and making the rotation of the multi-tooth connecting shaft and the fan blade body more stable.

[0024] Optionally, the upper shell includes a flip cover, a sealing cover and a buffer pad, the flip cover is rotatably connected to one side of the middle shell, the sealing cover is fixedly mounted on the inner wall of the flip cover, and the buffer pad is arranged between the flip cover and the sealing cover; the lower shell is also provided with a lighting lamp and a function button, the lighting lamp and the fan assembly are electrically connected to the function button, and the lighting lamp and the function button are arranged on the end surface of the inner frame of the lower shell away from the middle shell.

[0025] By adopting this technical solution, the sealing cover can seal the gap between the flip cover and the middle shell when the flip cover is covered on the middle shell, thereby reducing the probability of debris entering the ventilation fan from the gap between the flip cover and the middle shell. At the same time, it can also isolate the interior environment of the vehicle from the external environment, so that a closed space is formed in the vehicle. The buffer pad can play a buffering role during the installation of the flip cover and the sealing cover, so that the installation contact surface is evenly stressed; the lighting lamp can provide lighting for the interior of the vehicle. Integrating the lighting lamp on the ventilation fan can not only save the internal space of the RV but also facilitate the repair and replacement of the lighting lamp when it is damaged. The function buttons can control the lighting lamp and the ventilation fan. Various functional operations such as turning on the exhaust fan, adjusting the wind speed, and turning on the lighting lamp can be completed through the function buttons. The integration is high and the operation is simple.

[0026] Second aspect: The utility model provides a motorhome using the above-mentioned ventilating fan, adopting the following technical solution:

[0027] A motorhome comprises: a carriage and the ventilation fan as described in the first aspect, wherein a ventilation port is provided on the carriage, the ventilation fan is installed in the ventilation port, the lower shell of the ventilation fan is installed on the side of the ventilation port close to the interior of the carriage, the middle shell of the ventilation fan is installed on the side of the ventilation port close to the exterior of the carriage, and the middle shell and the lower shell are fixedly connected and clamped on both sides of the ventilation port.

[0028] By adopting the above technical solution, when the RV opens the ventilation fan for ventilation, the flap of the ventilation fan can stably support the opening when opened. At the same time, when replacing the gauze of the ventilation fan, the gauze of the ventilation fan can be replaced and disassembled through the quick disassembly and assembly structure, which is convenient for cleaning and maintenance of the gauze.

[0029] In summary, the present invention includes at least one of the following beneficial technical effects:

[0030] By using a worm gear to drive the rocker arm shaft to rotate and drive multiple rocker arms to rotate, the upper shell can be opened smoothly when opening, and stable support is provided for the upper shell, reducing the probability of deformation and damage of the upper shell and the supporting structure when subjected to external force, thereby extending the service life.

[0031] A quick-release structure is formed by arranging a latch and a locking assembly on the gauze net, so that the cleaning and replacement of the gauze net are convenient.

[0032] The motor is installed on the supporting beam of the middle shell to provide stable support for the motor, and the connection between the motor's output shaft and the fan blade assembly is optimized to improve the dynamic balance of the fan blades, reduce the vibration generated by the fan during operation, and reduce noise.

[0033] A sealing cover is provided on the flap, which can effectively seal the gap between the flap and the middle shell, reduce the probability of debris entering the ventilation fan through the gap between the flap and the middle shell, and increase the sealing performance of the ventilation fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0035] Figure 2 This is a schematic diagram of the ventilation fan in the embodiment in an open state;

[0036] Figure 3 This is a schematic diagram of the ventilation fan in the embodiment in a closed state;

[0037] Figure 4 Schematic diagram of the overall structure of the lower shell of this embodiment;

[0038] Figure 5 is a schematic diagram of the inner frame of the lower shell of this embodiment;

[0039] Figure 6 is a schematic diagram of a gauze assembly of this embodiment;

[0040] Figure 7 yes Figure 6 Middle A-A section schematic diagram;

[0041] Figure 8 Schematic diagram of the middle shell structure of this embodiment;

[0042] Fig. 9 Schematic diagram of the middle shell structure of this embodiment;

[0043] Fig.10 is a schematic diagram of the drive assembly of this embodiment;

[0044] Fig.11 is a schematic diagram of the overall structure of the ventilation fan of this embodiment;

[0045] Fig.12 is a schematic diagram of a fan assembly of this embodiment;

[0046] Fig.13 yes Fig.12 Schematic diagram of the middle BB section;

[0047] Fig.14 Schematic diagram of the upper shell structure of this embodiment;

[0048] Fig.15 yes Fig.14 Schematic side cutaway view.

[0049] Description of reference numerals: 100, upper shell; 110, flip cover; 111, reinforcing rib; 120, sealing cover; 130, buffer pad; 200, middle shell; 210, frame; 211, sealing strip; 212, rubber sealing ring; 220, support beam; 300, drive assembly; 3011, power source; 310, worm reducer; 311, worm wheel; 312, worm shaft; 313, connecting pin; 320, rocker shaft; 330, rocker; 340, rocker pin; 350, guide plate; 360, limit support block; 370, first sleeve; 380, second sleeve; 390, lifting handle; 400, fan assembly; 410, motor; 4 20. Fan blade assembly; 421. Fan blade body; 422. Multi-tooth connecting shaft; 430. Motor cover; 440. Shaft retaining ring; 500. Lower shell; 510. Lower shell inner frame; 511. Opening; 5111. Clamp hole; 512. Arc-shaped portion; 5121. Through hole; 513. Lighting lamp; 514. Function button; 520. Gauze mesh assembly; 521. Gauze mesh body; 522. Gauze mesh outer frame; 5221. Clamp pin; 530. Locking assembly; 5301. Pendulum block; 53011. Cam portion; 53012. Hand-held portion; 5302. Fastening pin; 5303. Cylindrical pin; 5304. Spring; 600. Carriage; 610. Ventilation port. DETAILED DESCRIPTION

[0050] The following combination Figures 1 to 15 The utility model is described in further detail.

[0051] The utility model embodiment discloses a motorhome. Figures 1 to 3 A motorhome includes a ventilation fan and a carriage 600. The ventilation fan includes an upper shell 100, a middle shell 200, a lower shell 500, a fan assembly 400 and a drive assembly 300. The middle shell 200 and the lower shell 500 are fixedly installed on the top of the carriage 600, one side of the upper shell 100 is rotatably connected to one side of the middle shell 200, the fan assembly 400 is fixedly installed inside the middle shell 200, and the drive assembly 300 drives the upper shell 100 and the middle shell 200.

[0052] Reference Figures 1 to 3 A square ventilation port 610 is provided on the top of the carriage 600 of the RV, and the middle shell 200 and the lower shell 500 are respectively installed on both sides of the square ventilation port 610. The middle shell 200 is placed outside the carriage 600, and the lower shell 500 is installed on the middle shell 200 through the square ventilation port 610 from the inside of the carriage 600, and the middle shell 200 and the lower shell 500 are fixed to the ventilation port 610 by screws. After the middle shell 200 and the lower shell 500 are fixedly connected, they will be firmly clamped on both sides of the ventilation port 610, thereby fixing them.

[0053] Reference Figures 4 to 6The lower shell 500 includes a lower shell inner frame 510, a mesh assembly 520 and a locking assembly 530. The lower shell inner frame 510 is connected to the middle shell 200 by screws. An opening 511 is provided in the middle of the lower shell inner frame 510 and an arc-shaped portion 512 protruding inward is provided on one side. The arc-shaped portion 512 has a through hole 5121. A clamping hole 5111 is provided on the inner wall of the opening 511 of the lower shell inner frame 510. A lighting lamp 513 and a function button 514 are also provided on the lower surface of the lower shell inner frame 510. The function button 514 is electrically connected to the lighting lamp 513 and the fan assembly 400, and the function button 514 can regulate the lighting lamp 513 and the fan assembly 400.

[0054] Reference Figure 6 to Figure 7 The gauze assembly 520 includes an integrally arranged gauze main body 521 and a gauze outer frame 522, the gauze main body 521 covers an opening in the middle of the gauze outer frame 522, a latch 5221 is provided on one side of the outside of the gauze outer frame 522, and a locking assembly 530 is installed on the other side of the gauze outer frame 522. The gauze assembly 520 inserts the latch 5221 into the latch hole 5111 of the lower shell inner frame 510 and combines with the locking assembly 530 to realize quick disassembly and assembly of the gauze assembly 520 and the opening 511 of the lower shell inner frame 510.

[0055] Reference Figure 7 The locking assembly 530 includes a pendulum block 5301, a fastening pin 5302, a cylindrical pin 5303 and a spring 5304, wherein the pendulum block 5301 includes a cam portion 53011 and a hand-held portion 53012, the hand-held portion 53012 is fixedly arranged on the outer circumference of the cam portion 53011, the cam portion 53011 is eccentrically arranged, the cam portion 53011 and the fastening pin 5302 are connected through the cylindrical pin 5303, the cylindrical pin 5303 is arranged along the axial direction of the cam portion 53011, the pendulum block 5301 can rotate around the cylindrical pin 5303, the fastening pin 5302 is a stepped shaft structure and is arranged on the outer frame 522 of the gauze mesh. In the inner hole, the spring 5304 is sleeved on the fastening pin 5302, one end of the spring 5304 abuts against the stepped shaft section of the fastening pin 5302, and the other end abuts against the inner wall of the inner hole on the mesh outer frame 522. Since the swing block 5301 is eccentrically arranged, the swing block 5301 can be moved to compress the spring 5304 and pull the fastening pin 5302 out of the corresponding insertion hole of the lower shell inner frame 510, and the mesh assembly 520 can be withdrawn at this time; the latch pin 5221 is aligned with the corresponding slot of the lower shell inner frame 510 and inserted, and the swing block 5301 is moved in the reverse direction, and the fastening pin 5302 rebounds under the action of the spring 5304 and is stuck into the corresponding insertion hole of the lower shell inner frame 510. In this way, the mesh assembly 520 can be quickly disassembled and assembled through the cooperation of the swing block 5301 and the fastening pin 5302, which is convenient for cleaning and replacement of the mesh assembly 520.

[0056] Reference Figures 8 to 9The middle shell 200 includes a frame 210 and a support beam 220. The support beam 220 is arranged in the middle of the frame 210. A sealing strip 211 is provided at the top edge of the frame 210. The sealing strip 211 can make the frame 210 and the upper shell 100 better sealed; a rubber sealing ring 212 is provided at the bottom edge of the frame 210. The rubber sealing ring 212 can make the frame 210 better sealed with the surface of the car body 600; a hinge for connecting with the upper shell 100 is provided on one side of the frame 210. The cross-section of the support beam 220 is a U-shaped structure. The U-shaped support beam 220 can enhance the rigidity and provide more stable support for the fan assembly 400, and the two ends of the support beam 220 are fixed on the inner wall of the frame 210.

[0057] Reference Figures 9 and 10 The driving assembly 300 includes a power source 3011, a worm gear reducer 310, a rocker shaft 320, a rocker arm 330, a rocker pin 340, a guide plate 350, a limit support block 360, a first sleeve 370, a second sleeve 380 and a lifting handle 390. The worm gear reducer 310 is fixed to one end of the support beam 220. The inner hole of the worm wheel 311 of the worm gear reducer 310 is axially arranged perpendicular to the support beam 220. The middle section of the rocker shaft 320 is hexagonal and passes through the inner hole of the worm wheel 311 of the worm gear reducer 310. The cross-sections of both ends of the rocker shaft 320 are cylindrical. The two first The bushings 370 are rotatably mounted on the two ends of the rocker shaft 320, and the two limit support blocks 360 are fixed on the inner walls on both sides of the frame 210 by screws. The two first bushings 370 are rotatably mounted in the corresponding inner holes of the limit support blocks 360. The two first bushings 370 and the corresponding limit support blocks 360 are installed at both ends of the rocker shaft 320 to realize the rotational support of the rocker shaft 320. The limit support blocks 360 and the first bushings 370 can limit the rocker shaft 320 to rotate stably around the axis of the rocker shaft 320, so that the upper shell 100 can be opened more smoothly.

[0058] Reference Fig.11 Two rocker arms 330 are provided, one end of which is fixed to the rocker arm shaft 320 respectively, and the other end is fixedly connected to the rocker arm pin 340 respectively. The two second sleeves 380 are rotatably set on the corresponding rocker arm pins 340 respectively. A long groove is set on the guide plate 350. The second sleeve 380 is slidably installed in the long groove of the guide plate 350. The long grooves of the rocker arm pin 340 and the guide plate 350 can limit the sliding range. The second sleeve 380 can convert the sliding friction between the rocker arm pin 340 and the guide plate 350 into rolling friction between the second sleeve 380 and the guide plate 350, thereby reducing wear.

[0059] Reference Fig.11The worm shaft 312 of the worm gear reducer 310 passes through the through hole 5121 of the arc-shaped portion 512. When the power source 3011 is a lifting handle 390, the lifting handle 390 is plugged into the worm shaft 312 of the worm gear reducer 310 through its own hole to achieve a tight fit. A connecting pin 313 perpendicular to the worm shaft 312 is also provided on the worm shaft 312. The lifting handle 390 further limits the circumferential rotation of the lifting handle 390 and the worm shaft 312 through the connecting pin 313. The lifting handle 390 is driven to rotate, and the upper shell 100 can be driven to flip through the driving assembly 300; when the power source 3011 is a driving motor, the driving motor is fixedly installed at the bottom of the support beam 220, and the output shaft of the driving motor is connected to the worm shaft 312 of the worm gear reducer 310 through a coupling, thereby realizing manual flipping or electric flipping of the flip cover 110.

[0060] Reference Figure 12 to Figure 13 The fan assembly 400 includes a motor 410, a fan blade assembly 420, a motor cover 430 and a shaft retaining ring 440. The motor 410 is fixed to the support beam 220 on the frame 210 through a threaded hole on its front end surface. The motor cover 430 is arranged above the motor 410. The motor cover 430 can protect the motor 410; the fan blade assembly 420 includes an integrally arranged fan blade body 421 and a multi-tooth connecting shaft 422. The multi-tooth connecting shaft 422 is made of metal material and Embedded in the inner hole at the axis center of the fan blade body 421, the output shaft of the motor 410 has a cylindrical cross-section at one end close to the motor 410 and a D-shaped cross-section at the end away from the motor 410. A groove is provided at the end of the D-shaped output shaft away from the motor 410. The D-shaped output shaft portion passes through the D-shaped inner hole of the multi-tooth connecting shaft 422. The shaft retaining ring 440 is stuck in the groove to limit the axial position of the fan blade assembly 420. The fan blade assembly 420 can be quickly disassembled and cleaned by using tools to remove the shaft retaining ring 440.

[0061] Reference Figure 14 to Figure 15 The upper shell 100 includes a flip cover 110, a sealing cover 120 and a buffer pad 130. A hinge is set on one side of the flip cover 110 and a side of the middle shell 200. The sealing cover 120 is connected to the corresponding hole position of the flip cover 110 by screws. The buffer pad 130 is set between the flip cover 110 and the sealing cover 120. The buffer pad 130 plays a buffering role during the installation process of the flip cover 110 and the sealing cover 120; a reinforcing rib 111 is set on the flip cover 110, and the guide plate 350 is fixed on the reinforcing rib 111 by screws. The reinforcing rib 111 can increase the local strength of the connection between the guide plate 350 and the flip cover 110, and reduce the deformation caused by insufficient strength when the flip cover 110 and the guide plate 350 are connected.

[0062] The specific implementation principle of the embodiment of the utility model is as follows: during installation, the fan assembly 400 is installed into the middle shell 200, the upper shell 100 and the middle shell 200 are rotatably connected, the drive assembly 300 excluding the lifting handle 390 is installed into the middle shell 200 and connected to the upper shell 100, the upper shell 100 and the middle shell 200 are installed as a whole from the outside of the car 600 into the corresponding opening 511 at the top of the car 600, and the lower shell inner frame 510 is installed from the inside of the car 600 through the corresponding opening 511 to the middle shell 2 00, insert the lifting handle 390 and limit it through the connecting pin 313, and install the screen assembly 520 into the lower shell inner frame 510 through the locking pin 5221 and the locking assembly 530; when in use, the opening and closing of the flip cover 110 is completed by manually driving the lifting handle 390 or electrically. After reaching the appropriate angle, various functional operations are completed through the remote control or the function buttons 514 on the lower shell 500, such as turning on the ventilation fan, adjusting the wind speed, turning on the lighting 513, adjusting the brightness and color of the light, setting the timer, etc.

[0063] In summary, in this embodiment, multiple rocker arms 330 are installed on the rocker arm shaft 320. The multiple rocker arms 330 have the same speed and force when lifting the flip cover 110, which can provide support for the upper shell 100 more stably, and the self-locking effect of the worm gear reducer 310 can make the upper shell 100 more firmly supported at the current opening; by cooperating the bayonet 5221, the locking assembly 530 and the socket arranged on the lower shell inner frame 510, the mesh assembly 520 can be quickly locked on the lower shell inner frame 510. The fan assembly 400 is quick to disassemble and assemble, so as to facilitate the subsequent cleaning and replacement of the screen assembly 520; the structure of the fan assembly 400 is optimized to improve the dynamic balance of the blade assembly 420, reduce the resonance generated by the fan assembly 400 during operation, and reduce noise; a sealing cover 120 is provided between the flap 110 and the middle shell 200 to effectively seal the gap between the flap 110 and the middle shell 200, reduce the probability of debris entering the ventilation fan through the gap between the flap 110 and the middle shell 200, and increase the sealing of the ventilation fan.

[0064] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A RV ventilator, comprising: An upper shell (100), a middle shell (200), a lower shell (500) and a fan assembly (400), wherein the middle shell (200) and the lower shell (500) are fixedly connected, one side of the upper shell (100) and one side of the middle shell (200) are rotatably connected, and the fan assembly (400) is fixedly mounted on the middle shell (200), characterized in that: A driving assembly (300) is further provided between the upper shell (100) and the middle shell (200), the driving assembly (300) comprising a power source (3011), a worm gear reducer (310), a rocker arm shaft (320), a plurality of rocker arms (330), and guide plates (350) corresponding one to each of the rocker arms (330), the worm gear reducer (310) being fixedly mounted on the middle shell (200), the rocker arm shaft (320) being rotatably disposed on the middle shell (200), and the rocker arm shaft (320) being rotatably disposed on the upper shell (100) and the middle shell (200). The rotation axes between the middle shells (200) are parallel, and the rocker arm shaft (320) is drivingly connected to the output shaft of the worm gear reducer (310), and the power source (3011) is drivingly connected to the input shaft of the worm gear reducer (310). One end of the rocker arm (330) is fixedly connected to the rocker arm shaft (320), and the other end of the rocker arm (330) is slidably arranged on the corresponding guide plate (350). The guide plate (350) is fixedly arranged on the upper shell (100), and the multiple rocker arms (330) are parallel to each other.

2. The RV ventilator according to claim 1, characterized in that: The power source (3011) is a lifting handle (390), and the lifting handle (390) is drivingly connected to the input shaft of the worm gear reducer (310); Alternatively, the power source (3011) is a drive motor, the output shaft of the drive motor is drivingly connected to the input shaft of the worm gear reducer (310), and the drive motor is fixedly mounted on the lower shell (500).

3. The RV ventilator according to claim 1, characterized in that: The inner wall of the upper shell (100) is further provided with a reinforcing rib (111), and the guide plate (350) is fixedly mounted on the reinforcing rib (111).

4. A RV ventilator according to any one of claims 1 to 3, characterized in that: The lower shell (500) comprises a lower shell inner frame (510) and a gauze assembly (520); the lower shell inner frame (510) and the middle shell (200) are fixedly connected; an opening (511) is provided on the lower shell inner frame (510); the gauze assembly (520) is covered on the opening (511); a clamping hole (5111) is provided on a side wall of the opening (511) of the lower shell inner frame (510); the gauze assembly (520) comprises a gauze body (521 ) and a gauze outer frame (522), the gauze body (521) being fixedly arranged at the opening of the gauze outer frame (522), a latch (5221) being arranged on one side of the gauze outer frame (522), the latch (5221) being inserted into the latch hole (5111), and a locking assembly (530) being arranged on the side of the gauze outer frame (522) away from the latch (5221) and being connected to the lower shell inner frame (510) via the locking assembly (530).

5. The RV ventilator according to claim 4, characterized in that: The locking assembly (530) comprises a pendulum block (5301), a fastening pin (5302), a cylindrical pin (5303) and a spring (5304); the fastening pin (5302) is slidably arranged on the mesh outer frame (522); the pendulum block (5301) comprises a cam portion (53011) and a hand-held portion (53012); the hand-held portion (53012) is fixedly connected to the cam portion (53011); and the fastening pin (5302) is slidably arranged on the mesh outer frame (522). One end of the pin (5302) is rotatably connected to the cam portion (53011) via the cylindrical pin (5303); the outer peripheral surface of the cam portion (53011) contacts the inner wall of the mesh outer frame (522); one end of the spring (5304) is connected to the fastening pin (5302) and the other end is connected to the mesh outer frame (522); the spring (5304) has a tendency to cause the fastening pin (5302) to extend outward.

6. A RV ventilator according to any one of claims 1 to 3, characterized in that: The middle shell (200) comprises a frame (210) and a support beam (220); the frame (210) and the lower shell (500) are fixedly connected; the support beam (220) is fixedly arranged on the frame (210); the cross section of the support beam (220) is U-shaped; and the fan assembly (400) is fixedly mounted on the support beam (220).

7. The RV ventilator according to claim 6, characterized in that: The fan assembly (400) comprises a motor (410) and a blade assembly (420); the motor (410) is fixedly mounted on the support beam (220); the blade assembly (420) comprises an integrally arranged blade body (421) and a multi-tooth connecting shaft (422); the multi-tooth connecting shaft (422) is passed through the blade body (421); the multi-tooth connecting shaft (422) and the blade body (421) are coaxially arranged; and the multi-tooth connecting shaft (422) is coaxially arranged with an output shaft of the motor (410).

8. The RV ventilator according to claim 7, characterized in that: The fan assembly (400) further comprises a shaft retaining ring (440), the end of the output shaft of the motor (410) being provided with a groove, the shaft retaining ring (440) being installed in the groove at the end of the output shaft of the motor (410), and one end face of the shaft retaining ring (440) being in contact with an end face of the multi-tooth connecting shaft (422) away from the motor (410).

9. A RV ventilator according to any one of claims 1 to 3, characterized in that: The upper shell (100) comprises a flip cover (110), a sealing cover (120) and a buffer pad (130); the flip cover (110) is rotatably connected to one side of the middle shell (200); the sealing cover (120) is fixedly mounted on the inner wall of the flip cover (110); and the buffer pad (130) is arranged between the flip cover (110) and the sealing cover (120); the lower shell (500) is also provided with an illumination lamp (513) and a function button (514); the illumination lamp (513) and the function button (514) are arranged on an end surface of the lower shell inner frame (510) away from the middle shell (200); the illumination lamp (513) and the fan assembly (400) are both electrically connected to the function button (514).

10. A recreational vehicle, comprising a carriage (600), characterized in that: It also comprises a ventilation fan as claimed in any one of claims 1 to 9, wherein a ventilation port (610) is provided on the carriage (600), the ventilation fan is installed in the ventilation port (610), the lower shell (500) of the ventilation fan is installed on the side of the ventilation port (610) close to the inside of the carriage (600), the middle shell (200) of the ventilation fan is installed on the side of the ventilation port (610) close to the outside of the carriage (600), and the middle shell (200) and the lower shell (500) are fixedly connected and clamped on both sides of the ventilation port (610).

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