CN220390924U - Ventilating device suitable for automatic opening and closing - Google Patents

Abstract

The utility model discloses a ventilation device suitable for automatic opening and closing, which comprises: the lower seat body is used for being fixed on a motor home; a fan assembly including a fan provided on the lower housing and a driver for driving the fan to operate; the filter screen plate comprises an annular framework fixed on the lower seat body and a plurality of filter holes uniformly distributed on the annular framework; the lower seat body is provided with a hollowed-out structure for exposing a plurality of filtering holes; the upper housing is movably matched and connected with the top of the lower seat body through the lifting driving assembly so as to be suitable for forming circumferential shielding for the filter screen plate; the lifting driving assembly is suitable for driving the upper housing to move to one side far away from the lower base body so as to enable the upper housing to release the circumferential shielding of the filter screen plate; and the lifting driving component is also suitable for driving the upper housing to move to one side of the lower base body so as to enable the upper housing to form circumferential shielding for the filter screen plate.

Description

Ventilating device suitable for automatic opening and closing

Technical Field

The utility model relates to the technical field of vehicle accessories, in particular to a ventilation device suitable for automatic opening and closing.

Background

Ventilation devices are typically deployed in motor homes to keep the air inside the car fresh. In order to reduce the occupancy of the ventilation device to the interior space of the caravan, the ventilation device is generally disposed on the top of the caravan. For the ventilation device assembled at the top of the caravan, in order to realize the conduction of the air flow inside and outside the caravan, a through hole for facilitating the air flow to pass through is necessarily prefabricated in the ventilation device, and the use of the outdoor caravan cannot avoid the rainy day, so that the ventilation device needs to be provided with an upper housing which can prevent rainwater and dust from entering the ventilation device.

Under the above circumstances, it should be further noted that the upper housing needs to satisfy, in the ventilation device, both the protection effect against rain and the shielding effect that does not cause air flow conduction when rain protection is not required any more. Therefore, compared with the integral ventilating device, the upper housing needs to be provided with a structure which can be convenient for adjusting the use state of the upper housing, so that the integral ventilating device can realize the switching of the opening and closing states of the upper housing, wherein the opening of the upper housing specifically refers to the situation that the upper housing does not cause the shielding of air flow conduction, so that the air flow can freely circulate inside and outside a motor home, and the closing of the upper housing specifically refers to the situation that the upper housing forms the shielding of the air flow conduction, so that the circulation of the air flow inside and outside the motor home is blocked.

In this regard, for example, a motor home purification ventilator assembly disclosed in CN214984726U includes a fan blade structure and a dust-proof filter element disposed above the fan blade structure; specifically, a sealing screen plate is arranged above the filter element, and the sealing screen plate realizes the opening and closing operation of the sealing screen plate relative to the exhaust frame under the action of a positive motor and a negative motor. In this regard, although the waterproof effect can be effectively ensured, the front and back motor needs to be used, and the front and back motor is located at the outer side of the exhaust frame, so that the waterproof problem of the front and back motor needs to be matched with the corresponding structure, and the front and back motor used in the external environment has higher requirements on the overall performance. Therefore, although the car as a house purification scavenger fan assembly under this structure can satisfy waterproof problem simultaneously, still need further optimizing in the aspect of the simplification of its overall structure, consequently with regard to overall structure, the complexity of structure can bring manufacturing cost's increase on the one hand, on the other hand still can increase the fault rate of using, even shortens overall structure's life.

Therefore, for the purifying ventilator applied in the motor home, not only the realization of effective water resistance is considered, but also the simplification of the whole structure is considered, thereby reducing the simplification of the structure.

Disclosure of Invention

The utility model aims to provide a ventilation device suitable for automatic opening and closing so as to solve the technical problem of simultaneously considering the waterproof effect and the structural simplicity.

The ventilation device suitable for automatic opening and closing is realized by the following steps:

a ventilation device adapted to automatically open and close, comprising:

the lower seat body is used for being fixed on a motor home;

a fan assembly including a fan provided on the lower housing and a driver for driving the fan to operate;

the filter screen plate comprises an annular framework fixed on the lower seat body and a plurality of filter holes uniformly distributed on the annular framework; the lower seat body is provided with a hollowed-out structure for exposing a plurality of filtering holes;

the upper housing is movably matched and connected with the top of the lower seat body through the lifting driving assembly so as to be suitable for forming circumferential shielding for the filter screen plate;

the lifting driving assembly is suitable for driving the upper housing to move to one side far away from the lower seat body so as to enable the upper housing to release the circumferential shielding of the filter screen plate; and the lifting driving component is also suitable for driving the upper housing to move towards one side of the lower base body so as to enable the upper housing to form circumferential shielding for the filter screen plate.

In an alternative embodiment of the present utility model, the ventilation device suitable for automatic opening and closing further includes a mesh plate connected to the lower base and located on a side of the filter screen plate facing away from the housing;

the screen plate comprises a rotary main body and a plurality of ventilation grooves, wherein the rotary main body is matched and connected with the lower seat body, and the ventilation grooves are formed in the rotary main body.

In an alternative embodiment of the present utility model, the lower base includes a support base for being fixed on a caravan and a support beam erected on the top of the support base; wherein the method comprises the steps of

The supporting seat is provided with a hollow accommodating cavity which penetrates through the top and the bottom of the supporting seat; the hollow structure is formed between the supporting seat and the supporting beam; and

and the supporting beam is provided with a lifting driving assembly connected with the upper housing.

In an alternative embodiment of the utility model, the lifting driving assembly comprises a rack arranged between the top cover and the supporting beam and extending along the lifting movement direction of the upper housing, a transmission gear meshed with the rack, and a driving motor connected with the transmission gear; wherein the method comprises the steps of

The transmission gear and the driving motor are fixedly assembled on the supporting beam.

In an alternative embodiment of the present utility model, the rack includes a strip-shaped body, and a tooth-shaped portion, a first positioning groove and a second positioning groove provided on the strip-shaped body; the first positioning groove and the second positioning groove are arranged at intervals along the lifting movement direction of the upper housing, and the second positioning groove is positioned below the first positioning groove; and

the lifting driving assembly further comprises a push rod which is arranged on the supporting beam and is suitable for being in switching connection with the first positioning groove and the second positioning groove, and an elastic piece which is arranged between the push rod and the supporting beam;

when the ejector rod is abutted against the first positioning groove, the upper housing forms circumferential shielding for the filter screen plate; when the ejector rod is abutted against the second positioning groove, the upper housing releases circumferential shielding of the filter screen plate.

In an alternative embodiment of the utility model, the ejector rod is provided with a top head which is suitable for being abutted against the first positioning groove and the second positioning groove and a counter bore which is arranged in the inner cavity of the ejector rod and is used for accommodating the elastic piece;

one end of the elastic piece extends out of the ejector rod from the counter bore to be connected with the supporting beam.

In an alternative embodiment of the utility model, a first limit boss and a second limit boss positioned below the first limit boss are further arranged on the strip-shaped main body at intervals along the lifting movement direction of the upper housing; and

the lifting driving assembly further comprises a micro switch which is arranged on the supporting beam and is suitable for being contacted by the first limiting boss and the second limiting boss in a switching mode;

when the micro switch is triggered by the first limiting boss, the upper housing forms a circumferential shielding for the filter screen plate; when the micro switch is triggered by the second limiting boss, the upper housing releases the circumferential shielding of the filter screen plate.

In an alternative embodiment of the utility model, the upper housing comprises a housing body for forming a circumferential shield for the screen plate and a top cover integrally connected to the housing body for covering the top end of the lower housing body.

In an alternative embodiment of the utility model, a limit part suitable for sliding fit of the side wall of the supporting beam is arranged on the inner side wall of the cover body.

In an alternative embodiment of the utility model, the annular skeleton is in plug-in fit with the inner wall of the support beam.

In an alternative embodiment of the utility model, the inner wall of the supporting beam is provided with a convex guide rib, and the outer side wall of the annular framework is correspondingly provided with a concave guide groove which is suitable for being in inserted fit with the guide rib; and

and the inner wall of the supporting beam is also provided with an elastic buckle which is suitable for supporting one end of the annular framework, which faces away from the housing.

By adopting the technical scheme, the utility model has the following beneficial effects: the utility model is suitable for the automatic open-close ventilation device, first, the design of the upper housing is used for realizing the waterproof protection of the filter screen plate and the lower seat body; secondly, go up the housing and pass through the lift drive assembly and the top activity joining in marriage of lower pedestal for go up the housing and realize the switching of the switching state of upper housing for lower pedestal under the effect of lift drive assembly, can freely switch between forming the circumference to the screen plate shelter from and remove the circumference to the screen plate shelter from these two states, under this structure, can switch the service condition of whole ventilation unit as required. And moreover, the upper housing is switched relative to the opening and closing state of the lower base body by the driving motor of the lifting driving assembly, so that the automation degree of the switching process is high, and the use is convenient.

In addition, transition board and lower pedestal grafting complex mode convenient to detach, and the filter screen board is including fixing the annular skeleton on lower pedestal, and holistic filter screen board is along its axial assembly in lower pedestal promptly, under such structure, even go up the housing and open the in-process of taking a breath, still do not have foreign matter etc. to fall on the filter screen. Even forget to close the housing in rainy days, the rainwater can be prevented from entering the ventilation device through the filtering holes in the filtering net plate to a large extent.

Drawings

FIG. 1 is a schematic view of the structure of an upper housing shielding screen plate of a ventilation device adapted to be automatically opened and closed in accordance with the present utility model;

FIG. 2 is a schematic view of the structure of the upper housing of the automatic opening and closing ventilation device of the present utility model to release the shielding of the screen plate;

FIG. 3 is a schematic view of an exploded structure of a ventilation device adapted to be automatically opened and closed according to the present utility model;

FIG. 4 is a schematic view of the upper casing of the ventilation device adapted to be automatically opened and closed in a state separated from other structures;

FIG. 5 is a schematic view of the structure of the upper casing of the ventilation device adapted to be automatically opened and closed according to the present utility model;

FIG. 6 is a schematic view of a first view angle structure of a lower base of the ventilation device suitable for automatic opening and closing according to the present utility model;

FIG. 7 is a schematic view showing a partial structure of a lower housing of the ventilating device adapted to be automatically opened and closed according to the present utility model;

FIG. 8 is a schematic view of a second view angle structure of a lower base of the ventilation device suitable for automatic opening and closing according to the present utility model;

FIG. 9 is a schematic view of the structure of a screen panel of the ventilation device adapted to be automatically opened and closed according to the present utility model;

FIG. 10 is a schematic view showing the structure of a mesh plate of a ventilation device adapted to be automatically opened and closed according to the present utility model;

FIG. 11 is a schematic view of a first view of a rack of a vent adapted to automatically open and close in accordance with the present utility model;

FIG. 12 is a second perspective view of a rack of the vent of the present utility model adapted to be automatically opened and closed;

FIG. 13 is a schematic view of a first view of a lift pin of a vent adapted for automatic opening and closing in accordance with the present utility model;

FIG. 14 is a schematic view of a first view of a lift pin of a vent adapted for automatic opening and closing in accordance with the present utility model;

FIG. 15 is a schematic cross-sectional view of an upper housing blocking screen plate of the vent apparatus adapted for automatic opening and closing of the present utility model;

FIG. 16 is a schematic view of the lift drive assembly of the automatic opening and closing ventilation device of the present utility model;

FIG. 17 is a schematic view of a part of the elevation drive assembly of the ventilating apparatus adapted to be automatically opened and closed according to the present utility model;

FIG. 18 is a schematic view of the mating structure of the micro-switch and the first limit boss when the upper housing of the ventilation device adapted to automatically open and close shields the screen plate;

FIG. 19 is a schematic view showing the cooperation structure of the ejector rod and the rack when the upper housing of the ventilation device suitable for automatic opening and closing gradually releases the shielding of the filter screen plate;

FIG. 20 is a schematic view of the mating structure of the micro-switch and the first limit boss when the upper housing of the ventilation device suitable for automatic opening and closing thoroughly releases the shielding of the screen plate;

FIG. 21 is a schematic view of the cooperation structure of the ejector rod and the second positioning groove of the rack when the upper housing of the ventilation device suitable for automatic opening and closing thoroughly releases the shielding of the filter screen plate;

FIG. 22 is a schematic view of the mating structure of the upper housing of the automatic opening and closing ventilation device of the present utility model with a caravan when the upper housing shields the screen plate;

fig. 23 is a schematic diagram of a structure of the upper housing of the ventilation device suitable for automatic opening and closing, which is used for removing the shielding of the filter screen plate and matching with a motor home.

In the figure:

the lower seat body 1, the supporting seat 11, the accommodating cavity 12, the connecting plate 13, the supporting plate 15, the guide rail ribs 14, the guide convex ribs 16, the mounting seat 18, the limit groove 181, the guide ribs 182, the spigot 19, the connecting ring 110 and the elastic buckle 111;

the filter screen plate 2, the annular framework 21, the filter holes 22, the guide grooves 23 and the positioning grooves 25;

the upper housing 3, the housing body 31, the top cover 32 and the contact surface 33;

the screen 4, the rotary body 41, the ventilation groove 42, the mounting opening 43, the torsion part 45, and the movable groove 46;

a fan 51, a fan screw 52, a driver 53;

the micro-switch 6, the positioning seat 61 and the limiting buckle 62;

the driving motor 71, the transmission gear 72, the rack 73, the strip-shaped main body 75, the tooth-shaped part 74, the first limiting boss 76, the second limiting boss 77, the first positioning groove 78, the second positioning groove 79, the limiting rib 710 and the guiding groove 711;

the ejector rod 8, the ejector head 81, the elastic piece 82, the guide groove 83 and the counter bore 85;

and (5) a motor home A.

Detailed Description

In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

Example 1:

referring to fig. 1 to 23, the present embodiment provides a ventilation device suitable for automatic opening and closing, which includes: a lower base 1 for fixing on a motor home, a fan assembly assembled on the lower base 1, a filter screen plate 2, an upper housing 3 and a screen plate 4.

Next, in detail for each structure, first, the lower housing 1:

structurally, the lower base 1 includes a support base 11 for fixing to a car as a house and a support beam erected on the top of the support base 11; wherein the support 11 has a hollow receiving cavity 12 through its top and bottom. The whole supporting seat 11 has a ring-shaped structure, and the supporting beam comprises a pair of connecting plates 13 connected with the supporting seat 11 and a supporting plate 15 which is simultaneously connected with the pair of connecting plates 13 and is positioned above the supporting seat 11. In order to facilitate the fixing of the support seat 11 with the caravan a, an everted connection ring 110 may be integrally provided on the support seat 11 to fix with the caravan a.

Next is the upper housing 3:

structurally, the upper casing 3 includes a casing 31 for forming a circumferential screen for the screen plate 2 and a top cover 32 integrally connected to the casing 31 for covering the top end of the lower housing 11. The top cover 32 is used to form a shield for the upper side of the lower housing 11, and the cover 31 is used to form a shield for the circumferential side of the lower housing 1, so that the entire waterproof effect of the ventilation device is achieved by shielding in the axial and circumferential directions of the support housing 11.

On the basis of the above structure, in order to further ensure the waterproof and dustproof effects of the upper housing 3 on the whole ventilation device, when the housing 31 forms a circumferential shielding for the screen plate 2, in an alternative implementation case, the end edge of the housing 31 facing away from the top cover 32 is attached to the outer edge of the supporting seat 11 corresponding to the top end of the top cover 32, that is, a gap suitable for the entry of impurities does not exist between the inner wall of the housing 31 and the outer side wall of the supporting seat 11. Under the further alternative implementation condition, the end edge of the cover body 31 facing away from the top cover 32 is attached to the top end surface of the supporting seat 11 facing towards the top cover 32, and the waterproof adhesive tape can be designed on the top end surface of the supporting seat 11 facing towards the top cover 32, so that the waterproof and dustproof effects of the whole ventilation device can be ensured by pressing the cover body 31 against the waterproof adhesive tape.

Based on the above, as for one example in conjunction with the drawings, the following is about the coupling structure between the upper housing 3 and the lower housing 11:

generally, the upper housing 3 is movably coupled to the top of the lower housing 1, i.e., the support beam in this embodiment, by a lift driving assembly.

As an alternative, with reference to the accompanying drawings, the lifting drive assembly comprises a rack 73 provided between the top cover 32 and the support plate 15 of the support beam and extending in the lifting movement direction of the upper casing 3, a transmission gear 72 engaged with said rack 73, and a drive motor 71 connected to the transmission gear 72; wherein the transmission gear 72 and the driving motor 71 are fixedly assembled on the support beam.

More specifically, the rack 73 in this embodiment may optionally be attached to the top cover 32 using, for example, but not limited to, screws. The cooperation between the rack 73 and the support plate 15 is realized by the following structure:

first, the mount 18 for accommodating the partial rack 73 is provided on the support plate 15; secondly, because the rack 73 needs to drive the upper housing 3 to do lifting motion under the action of the transmission gear 72, in this process, in order to accurately limit the moving track of the upper housing 3, a concave-convex matched limiting structure is further arranged between the rack 73 and the mounting seat 18. The concave-convex structure optionally comprises a protruding limit rib 710 arranged on the side wall of the rack 73 and a limit groove 181 matched with the limit rib 710 and arranged in the mounting seat 18, and a guide groove 711 is formed by the adjacent limit rib 710, and similarly, a guide rib 182 matched with the guide groove 711 is formed by the adjacent limit groove 181. In this way, with the structure of the concave-convex fit, the track of the lifting movement of the rack 73 with respect to the mount 18 is accurate and reliable, and no unintended deviation occurs, thereby ensuring the accuracy of the movement track of the upper casing 3 connected to the rack 73 with respect to the lower casing.

In addition, it is also necessary to explain about the connection plate 13 of the present embodiment that, although the limitation of the movement track of the upper housing 3 can be achieved by precisely limiting the movement track of the rack 73, considering that the upper housing 3 itself has a certain dead weight, the support of the rack 73 to the upper housing 3 is only at a certain assembly point, and under this structure, it is difficult to effectively ensure the stability of the upper housing 3 during the lifting movement relative to the lower housing through the support of a single assembly point, the present embodiment further makes the following design between the connection plate 13 and the housing 31:

for example, in combination with the drawings, the outer side wall of the connecting plate 13 is coplanar with the outer side wall of the supporting seat 11, and when the cover body 31 forms circumferential shielding for the screen plate 2, the end edge of the cover body 31 facing away from the top cover 32 is attached to the top end surface of the supporting seat 11 facing the top cover 32, and a concave contact surface 33 is arranged on the inner wall surface of the cover body 31, so that the cover body 31 and the connecting plate 13 are in limit fit with the connecting plate 13 through the contact surface 33, and in the process of lifting movement of the upper cover shell 3 relative to the lower base body 1, sliding fit is formed between the contact surface 33 and the connecting plate 13, that is, the connecting plate 13 limits the movement track of the upper cover shell 3. With this structure, the lifting movement of the upper housing 3 relative to the lower housing 1 can be defined in a common path by the pair of connecting plates 13 and the rack 73, so that the stability and reliability of the movement state of the upper housing 3 can be improved while the accuracy of the movement path is ensured. It should be noted that, in this embodiment, the outer side wall of the connecting plate 13 and the outer side wall of the supporting seat 11 may not be coplanar, and only an adaptive structure is designed on the cover 31 according to the specific situation of the connecting plate 13 to enable the connecting plate to form a limit fit with the cover 31, which is not absolutely limited in this embodiment.

In addition, the present embodiment is also designed as follows in view of the need for automatic control of the on and off states of the drive motor 71:

the rack 73 includes a bar-shaped body 75 formed with the stopper rib 710 and the guide groove 23, and a tooth-shaped portion 74 formed on the bar-shaped body 75 for engagement with the transmission gear 72. Further, a first stopper boss 76 and a second stopper boss 77 located below the first stopper boss 76 are provided at intervals in the lifting movement direction of the upper housing 3 in the bar-shaped body 75. Based on this structure, the micro switch 6 adapted to be switchably contacted by the first limit boss 76 and the second limit boss 77 is provided on the support plate 15 of the support beam; when the microswitch 6 is triggered by the first limit boss 76, the upper housing 3 forms a circumferential shield for the screen plate 2; when the microswitch 6 is triggered by the second limiting boss 77, the upper housing 3 releases the circumferential shielding of the screen plate 2. Specifically, a positioning seat 61 for mounting and fixing the micro switch 6 is provided on the support plate 15, and the micro switch 6 is fixed in the positioning seat 61 by a limit catch 62, where the limit catch 62 is integrally formed on a side wall of the positioning seat 61.

Further, the fan assembly:

specifically, the fan assembly includes a fan 51 provided on the support plate 15 of the lower housing 1 and a driver 53 for driving the fan 5 to operate. The drive 53 may be, for example, but is not limited to, a motor. The motor drives the fan 51 in a manner such as, but not limited to, a gear drive. The fan 51 may be fixed at a side end of the support plate 15 facing the support seat 11, and the driver 53 is fixed at a side end of the support plate 15 facing away from the support seat 11, so that the fan 51 and the driver 53 are not interfered with each other, and the installation space is effectively utilized. Here, the fan 51 is mounted on the support plate 15 by the fan screw 52, and therefore, the fan 51 can be taken out only by removing the fan screw 52.

Again, the screen plate 2:

the filter screen plate 2 comprises an annular framework 21 fixed on the inner wall of the connecting plate 13 of the supporting beam of the lower seat body 1 and a plurality of filter holes 22 uniformly distributed on the annular framework 21; that is, the integral screen plate 2 is vertically fitted in the lower housing 1 in the axial direction thereof. It should be noted that, because the connecting plates 13 are raised to a certain height relative to the supporting seat 11, under the condition that the annular framework 21 and the connecting plates 13 are assembled in place, the filter holes 22 on the annular framework 21 are completely exposed in the area above the supporting seat 11, that is, through the raised height of the connecting plates 13 relative to the supporting seat 11, a hollow structure for exposing a plurality of filter holes 22 is formed between the two connecting plates 13 on the whole lower seat body 1, the filter screen plate 2 is fixed above the supporting seat 11 in the lower seat body 1 through the connecting plates 13, the supporting seat 11 does not cause shielding of the filter holes 22 on the filter screen plate 2, and smooth circulation of air flow is ensured. The hollowed-out structure in the present embodiment includes a hollow structure formed between the two connection plates 13, that is, there is no connection portion between the two connection plates 13, and the screen plate 2 may be completely exposed in this region. Of course, a connection part may be provided between the two connection plates 13, so long as the connection part is provided with hollowed-out holes correspondingly communicated with the plurality of filtering holes 22 on the filter screen plate 2, so that the air flow can flow to the outer side of the lower seat body 1 of the ventilation device after passing through the filtering holes 22 and the hollowed-out holes in sequence. That is to say, the hollow structure in this embodiment may be various, so long as the structure of the lower base 1 that does not shade the filtering holes 22 on the filter screen plate 2 meets the use requirement of this embodiment, the specific shape of the hollow structure is not limited in this embodiment.

Based on the above, as an example of a case in conjunction with the drawings, the assembly structure between the ring-shaped skeleton 21 and the lower base body 1 is as follows:

generally, the annular skeleton 21 is in plug-in fit with the inner wall of the support beam. Specifically, a convex guiding rib 16 is arranged on the inner wall of the connecting plate 13, and a concave guiding groove 23 suitable for being in plug-in fit with the guiding rib 16 is correspondingly arranged on the outer side wall of the annular framework 21; in the process of assembling the annular skeleton 21 and the lower seat body 1, the integral annular skeleton 21 penetrates through the accommodating cavity 12 from the bottom of the supporting seat 11 and is assembled with the connecting plate 13 of the supporting beam in a plugging manner. After the annular skeleton 21 and the connection plate 13 are assembled in place, the fan 51 is positioned just inside the inner hole of the annular skeleton 21.

Furthermore, after the assembly of the annular skeleton 21 with the connecting plate 13 in place, the axial ends of the annular skeleton 21 facing the upper casing 3 can abut against the support plate 15, so that the support plate 15 forms a limit for one axial end of the annular skeleton 21, whereas for the axial ends of the annular skeleton 21 facing away from the casing 3, the present embodiment provides a stop structure, in particular an elastic catch 111 suitable for bearing the annular skeleton 21, also provided on the connecting plate 13 or on the inner wall of the support seat 11. The embodiment is not in any way limited here, in particular whether it is provided on the connection plate 13 or on the support seat 11. The elastic buckle 111 is provided with a clamping head protruding from the inner wall of the connecting plate 13 or the supporting seat 11 under the action of non-stress, and in the process of assembling the annular framework 21 and the lower seat body 1, the annular framework 21 can generate jacking pressure to the elastic buckle 111 from the inner wall side of the connecting plate 13 or the supporting seat 11, so that the elastic buckle 111 is prevented from influencing the assembly process of the annular framework 21, the jacking pressure of the annular framework 21 to the elastic buckle 111 can be relieved after the annular framework 21 and the connecting plate 13 are assembled in place, and at the moment, the clamping head of the elastic buckle 111 can be reset to keep the state of supporting the annular framework 21 from one side of the annular framework 21 back to the housing 3.

The following will be described as the mesh plate 4:

the integral screen 4 comprises a rotary main body 41 in rotary fit with the supporting seat 11 and a plurality of ventilation grooves 42 arranged on the rotary main body 41; it should be noted that, the support seat 11 may be directly coupled to the bottom of the support seat 11, or may be coupled to a cavity wall of the accommodating cavity 12, and the specific assembly position of the rotating body 41 is not limited in this embodiment.

Regarding the fitting of the rotary body 41 with the support seat 11, the present embodiment adopts, for example, the following structure:

at least two spigots 19 extending toward the center of the accommodation chamber 12 are provided on the chamber wall of the accommodation chamber 12; and at least two mounting openings 43 which are suitable for being matched with the at least two spigot 19 in a one-to-one fit are arranged on the circumferential edge of the rotary main body 41; the rotating body 41 is further formed on its circumferential edge along its rotation locus with a movable groove 46 adapted for insertion of at least two spigots 19. With this structure, when the rotary body 41 is assembled with the support 11, the mounting port 43 is aligned with the spigot 19, and then the rotary body 41 is rotated again so that the spigot 19 is brought into the movable groove 46, at which time the rotary body 41 is assembled with the support 11, and the rotary body 41 cannot be disengaged from the support 11 without re-fitting the mounting port 43 to the spigot 19 during rotation of the rotary body 41. The assembly between the rotary body 41 and the supporting seat 11 is realized by a simple rotation mode, and the operation is simple, convenient and efficient.

It should also be noted here that in an alternative embodiment, the guide ribs 16, which are in a plug-in fit with the annular frame 21, are provided protruding on the inner wall of the connecting plate 13 and can extend to the cavity wall of the receiving cavity 12, so that a rapid alignment of the annular frame 21 with the guide ribs 16 is facilitated during the assembly process. In a further alternative embodiment, the guide ribs 16 which are in a plug-in fit with the annular frame 21 are arranged on the inner wall of the connecting plate 13 in a protruding manner and do not extend to the cavity wall of the receiving cavity 12, while the integral filter screen plate 2 is connected with the connecting plate 13 in a plug-in manner after passing through the receiving cavity 12, for which purpose, in order to quickly realize the alignment of the annular frame 21 with the connecting plate 13 in the plug-in fit process, the embodiment also utilizes the alignment effect of the spigot 19, and in particular, a positioning groove 25 which is in plug-in fit with the spigot 19 is arranged on the outer side wall of the annular frame 21, so that the installation angle of the filter screen plate 2 relative to the connecting plate 13 is quickly determined by the plug-in fit of the spigot 19 with the positioning groove 25.

In addition, in order to facilitate the rotation of the rotating body 41, the end surface of the rotating body 41 facing away from the housing 3 in this embodiment is further provided with a raised torsion portion 45, where the rotating body 41 can be rotated only by pulling the torsion portion 45.

To sum up, for the ventilation device suitable for automatic opening and closing in this embodiment:

the upper housing 3 realizes the switching of the opening and closing states of the upper housing 3 relative to the lower base 1 under the action of the lifting driving assembly, and can be freely switched between two states of forming the circumferential shielding of the filter screen plate 2 and releasing the circumferential shielding of the filter screen plate 2. In addition, the upper housing 3 is switched relative to the lower base 1 by the driving motor 71 of the lifting driving assembly, so that the automation degree of the switching process is high, and the use is convenient. When the upper housing 3 releases the circumferential shielding of the filter screen plate 2, the driver 53 drives the fan 51 to rotate to form air flow, and the air in the motor home is discharged to the periphery through the filter screen plate 2, so that the air in the motor home is fresh. When the upper casing 3 forms a circumferential screen for the screen plate 2, the upper casing 3 may now act as a dust-and water-proof function for the ventilation device as a whole. In addition, in the present embodiment, the lifting drive assembly is built in between the upper housing 3 and the lower housing 1, so that the drive motor 71 does not need to be waterproofed, and the structure of the entire ventilation apparatus can be simplified.

Example 2:

on the basis of the ventilation device suitable for automatic opening and closing in embodiment 1, the ventilation device suitable for automatic opening and closing provided in this embodiment further has the following structural design:

a first positioning groove 78 and a second positioning groove 79 are provided on the strip-shaped main body 75 at intervals along the lifting movement direction of the upper housing 3; and the second positioning groove 79 is located below the first positioning groove 78; and the lifting driving assembly further comprises a mandril 8 arranged on the supporting beam and suitable for being in switching connection with the first positioning groove 78 and the second positioning groove 79, and an elastic piece 82 arranged between the mandril 8 and the supporting beam.

Based on the above structure, when the jack rod 8 abuts against the first positioning groove 78, the upper housing 3 forms a circumferential shielding for the screen plate 2; when the ejector rod 8 abuts against the second positioning groove 79, the upper housing 3 releases the circumferential shielding of the screen plate 2.

In addition, it should be noted that, the ejector rod 8 is provided with a top 81 adapted to abut against the first positioning slot 78 and the second positioning slot 79 and a counter bore 85 provided in the inner cavity of the ejector rod 8 and used for accommodating the elastic member 82; one end of the elastic member 82 extends out of the mandril 8 from the counter bore 85 to realize connection with the support beam. The contact surfaces of the plug 81 with the first positioning groove 78 and the second positioning groove 79 are preferably arc-shaped surfaces. And here the elastic member 82 may be a spring with one end inserted into the counterbore 85 and the other end protruding outside the carrier rod 8, so as to provide a force for the linear movement of the carrier rod 8 on the support plate 15 by the deformability of the spring.

When the rack 73 moves up and down with the upper housing 3 by the driving motor 71, the jack 8 moves on the support plate 15 perpendicular to the moving direction of the rack 73. In order to limit the movement path of the ram 8, guide ribs 14 for limiting the movement path of the ram 8 are provided on the support plate 15, while guide grooves 83 which are adapted to the guide ribs 14 are provided on the side walls of the ram 8.

In the embodiment, through the switching cooperation of the top 81 on the top rod 8 and the first positioning groove 78 and the second positioning groove 79, the positioning of the upper housing 3 relative to the lower bottom shell when the upper housing 3 is opened and closed is realized, and when the top rod 8 abuts against the first positioning groove 78, the upper housing 3 is in a closed state relative to the lower bottom shell; when the ejector rod 8 abuts against the second positioning groove 79, the upper housing 3 is opened with respect to the lower chassis.

In more detail, when the upper housing 3 is in a closed state relative to the lower housing, the first limit boss 76 of the rack 73 contacts with the micro switch 6 to trigger the micro switch 6, and a signal is provided to the system to control the driving motor 71 to stop rotating; meanwhile, under the elastic force of the elastic piece 82, the ejector rod 8 is matched with the first positioning groove 78 of the rack 73, and the upper housing 3 is positioned when moving to the closed position through the combination of the spring and the ejector rod 8.

When the upper housing 3 is gradually opened relative to the lower housing, the system supplies power to the driving motor 71, the driving motor 71 rotates, the rack 73 moves towards the side deviating from the lower housing along the direction perpendicular to the supporting plate 15 through the transmission fit of the transmission gear 72 and the rack 73, the limit of the ejector rod 8, the elastic piece 82 and the first positioning groove 78 is overcome, the upper housing 3 is gradually opened, meanwhile, the micro switch 6 is separated from the first limiting boss 76 of the rack 73, in the process, the rack 73 is driven by the driving motor 71 to pass through the first positioning groove 78, the strip-shaped main body 75 is in sliding contact with the ejector head 81 of the ejector rod 8, and the upper housing 3 is driven to move towards the side deviating from the lower housing continuously.

When the upper housing 3 is completely opened relative to the lower housing, at this time, the rack 73 moves to the top 81 of the ejector rod 8 under the driving of the driving motor 71 and falls into the second positioning groove 79 of the rack 73, meanwhile, the micro switch 6 contacts with the second limiting boss 77 of the rack 73, and signals of the micro switch 6 are triggered, at this time, if the driving motor 71 continues to operate, due to the limiting effect of the ejector rod 8 and the rack 73, the operation current of the driving motor 71 becomes larger, the system detects a large current (compared with the current in normal operation, the current becomes obviously larger) and signals of the micro switch 6, and when two different signals indicate that the upper housing 3 is in a completely opened state, the system cuts off the power to the driving motor 71.

When the upper housing 3 needs to be restored to be in a closed state relative to the lower housing, the system reversely energizes the driving motor 71, the rack 73 moves towards the lower housing along the vertical direction, and overcomes the limitation of the top head 81 of the ejector rod 8, the micro switch 6 is separated from the second limiting boss 77 of the rack 73, the micro switch 6 loses signals until the first limiting boss 76 of the rack 73 contacts with the micro switch 6 to trigger the micro switch 6 signals, meanwhile, the top head 81 of the ejector rod 8 also falls into the first positioning groove 78 to trigger large current, when the system detects the micro switch 6 and the current signals, the upper housing 3 is closed, and the system cuts off the driving motor 71.

The foregoing embodiments have been provided for the purpose of illustrating the general principles of the present utility model, and are more fully described herein with reference to the accompanying drawings, in which the principles of the present utility model are shown and described, and in which the general principles of the utility model are defined by the appended claims.

In the description of the present utility model, it should be understood that the terms "orientation" or "positional relationship" are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and to simplify the description, rather than to indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the present utility model, unless expressly stated or limited otherwise, a first feature may include first and second features directly contacting each other, either above or below a second feature, or through additional features contacting each other, rather than directly contacting each other. Moreover, the first feature being above, over, and on the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being below, beneath, and beneath the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is less level than the second feature.

Claims (11)

1. A ventilation device adapted to automatically open and close, comprising:

the lower seat body is used for being fixed on a motor home;

a fan assembly including a fan provided on the lower housing and a driver for driving the fan to operate;

the filter screen plate comprises an annular framework fixed on the lower seat body and a plurality of filter holes uniformly distributed on the annular framework; the lower seat body is provided with a hollowed-out structure for exposing a plurality of filtering holes;

the upper housing is movably matched and connected with the top of the lower seat body through the lifting driving assembly so as to be suitable for forming circumferential shielding for the filter screen plate;

the lifting driving assembly is suitable for driving the upper housing to move to one side far away from the lower seat body so as to enable the upper housing to release the circumferential shielding of the filter screen plate; and the lifting driving component is also suitable for driving the upper housing to move towards one side of the lower base body so as to enable the upper housing to form circumferential shielding for the filter screen plate.

2. The automatic opening and closing ventilating apparatus according to claim 1, further comprising a mesh plate connected to the lower base and located on a side of the mesh plate facing away from the housing;

the screen plate comprises a rotary main body and a plurality of ventilation grooves, wherein the rotary main body is matched and connected with the lower seat body, and the ventilation grooves are formed in the rotary main body.

3. The ventilation device adapted to be automatically opened and closed according to claim 1 or 2, wherein the lower housing comprises a support base for being fixed to a car as a house and a support beam erected on the top of the support base; wherein the method comprises the steps of

The supporting seat is provided with a hollow accommodating cavity which penetrates through the top and the bottom of the supporting seat; the hollow structure is formed between the supporting seat and the supporting beam; and

and the supporting beam is provided with a lifting driving assembly connected with the upper housing.

4. A ventilating device adapted to be automatically opened and closed according to claim 3, wherein the elevation driving assembly comprises a rack provided between the top cover and the support beam and extending in an elevation movement direction of the upper housing, a transmission gear engaged with the rack, and a driving motor connected to the transmission gear; wherein the method comprises the steps of

The transmission gear and the driving motor are fixedly assembled on the supporting beam.

5. The automatic opening and closing ventilating device according to claim 4, wherein the rack comprises a bar-shaped body, and a tooth-shaped part, a first positioning groove and a second positioning groove which are arranged on the bar-shaped body; the first positioning groove and the second positioning groove are arranged at intervals along the lifting movement direction of the upper housing, and the second positioning groove is positioned below the first positioning groove; and

the lifting driving assembly further comprises a push rod which is arranged on the supporting beam and is suitable for being in switching connection with the first positioning groove and the second positioning groove, and an elastic piece which is arranged between the push rod and the supporting beam;

when the ejector rod is abutted against the first positioning groove, the upper housing forms circumferential shielding for the filter screen plate; when the ejector rod is abutted against the second positioning groove, the upper housing releases circumferential shielding of the filter screen plate.

6. The ventilation device suitable for automatic opening and closing according to claim 5, wherein the ejector rod is provided with a plug suitable for abutting against the first positioning groove and the second positioning groove and a counter bore which is arranged in the inner cavity of the ejector rod and is used for accommodating the elastic piece;

one end of the elastic piece extends out of the ejector rod from the counter bore to be connected with the supporting beam.

7. The ventilation device suitable for automatic opening and closing according to claim 5, wherein a first limit boss and a second limit boss positioned below the first limit boss are further arranged on the strip-shaped main body at intervals along the lifting movement direction of the upper housing; and

the lifting driving assembly further comprises a micro switch which is arranged on the supporting beam and is suitable for being contacted by the first limiting boss and the second limiting boss in a switching mode;

when the micro switch is triggered by the first limiting boss, the upper housing forms a circumferential shielding for the filter screen plate; when the micro switch is triggered by the second limiting boss, the upper housing releases the circumferential shielding of the filter screen plate.

8. A ventilation device adapted to be automatically opened and closed according to claim 3, wherein the upper housing includes a housing body for forming a circumferential screen for the screen plate and a top cover integrally connected to the housing body for covering the top end of the lower housing body.

9. The automatic opening and closing ventilating device according to claim 8, wherein a limiting portion adapted to sliding fit with the side wall of the supporting beam is provided on the inner side wall of the cover body.

10. A ventilation device adapted to be automatically opened and closed according to claim 3, wherein the annular skeleton is in plug-in fit with the inner wall of the support beam.

11. The ventilation device suitable for automatic opening and closing according to claim 10, wherein the inner wall of the supporting beam is provided with a convex guide rib, and the outer side wall of the annular framework is correspondingly provided with a concave guide groove suitable for being in plug-in fit with the guide rib; and

and the inner wall of the supporting beam is also provided with an elastic buckle which is suitable for supporting one end of the annular framework, which faces away from the housing.