DE102005023471A1 - Unit to open and close an air channel, for the exchange of external/internal air in a vehicle air conditioning system, has a cap at the air channel with a rotating flap fitted with a cogwheel structure engaged by a motor drive - Google Patents

Abstract

The unit to open and close an air channel, especially for a vehicle air conditioning system, has a housing (11) to form an air channel (13,14) with a cap (12) to open and close it, which is operated by a motor drive (25). The cap has a rotating shaft (12b,12c) incorporated into the housing, and a flap (12a). The flap has a circular arc surface (R), with a radius around the shaft with a drive take-off cogwheel structure (24), which is engaged by the motor drive.

Description

BACKGROUND OF THE INVENTION

1. Field of the invention

The The present invention relates to an air duct opening and closing device to open and Shut down an air duct through an air duct opening and closing flap. For example, the air channel opening and closing device of the present invention is preferred for one in an air conditioner for a Motor vehicle integrated inside air / outside air changing device uses.

2. Description of others designs

A conventional air-duct opening and closing device integrated in an air conditioning system for an automobile will be described as follows. As in 13 shown, is the motor actuator 25 outside the air conditioning unit housing 11 arranged, and the air passage change flap formed from a disc door 120 is in the air passage in the air conditioning unit case 11 arranged, being on the rotary shaft 121 is rotatably mounted.

An end portion (an upper end portion shown in the drawing) of this rotary shaft 121 protrudes from the air conditioning unit housing 11 out. When this projecting end portion of the rotary shaft 121 with the output side of the motor actuator 25 via the power transmission mechanism 122 such as a connection mechanism is connected, the air passage changeover door 120 through the through the motor actuator 25 rotated torque generated so that an air passage in the housing 11 can be opened and closed.

As in 14 illustrates are the reduction gear 25b for reducing and transmitting a rotation of the motor 25a and the position detecting means formed of a potentiometer 25c in the motor actuator 25 built-in.

One Further prior art is in the description of the US patent application Publication No. 2003/0220066, which will be described as follows. In an air conditioner for a motor vehicle is a motor actuator with an air duct replacement flap (a Auslasswechselklappe) itself integrated into a body, and a Dregehgang of the motor actuator is on the air duct replacement flap over a Transmission mechanism, so that the air passage change flap can be rotated.

In the prior art are a large number of parts including the power transmission mechanism 122 such as a reduction gear 25b and a connection between the output portion of the engine 25a of the motor actuator 25 and the rotary shaft 121 the air channel exchange flap 120 arranged. Accordingly, the number of parts constituting the damper drive mechanism is large, which increases the manufacturing cost of the duct opening and closing device, and further increases the size of the entire duct opening and closing device.

Even in the case of the latter prior art are between the Output section of the motor actuator and the rotary shaft of the air passage exchange flap arranged several reduction gear groups, of these Parts are different. Therefore, the number of parts of the damper drive mechanism also big. Accordingly, the Production costs increased, and further, the size of the whole Air duct opening and closing device elevated.

SUMMARY OF THE INVENTION

In In view of the above points, the present invention has been made. It is an object of the present invention to design a flap drive mechanism of an air duct opening and closing device to simplify.

In order to achieve the above object, according to a first aspect of the present invention, there is provided an air passage opening and closing apparatus comprising a housing (FIG. 11 ) for forming an air channel ( 13 . 14 ); an air duct opening and closing flap ( 12 ) for opening and closing the air duct ( 13 . 14 ); and a motor actuator ( 25 ) for driving the air channel opening and closing flap ( 12 ), wherein the air channel opening and closing flap ( 12 ) a rotatable on the housing ( 11 ) mounted rotary shaft ( 12b . 12c ) and a valve body ( 12a ) for opening and closing the air duct ( 13 . 14 ), wherein the valve body ( 12a ) has a circular arc surface (R) whose radius is determined and that around the rotary shaft ( 12b . 12c ) is formed, a driven gear ( 24 ) on the circular arc surface (R) itself of the valve body ( 12a ) is trained; and a through the motor actuator ( 25 ) driven actuator-side gear with the driven gear ( 24 ) is engaged so as to open the air channel opening and closing flap ( 12 ) by the motor actuator ( 25 ) to drive.

Because of this, the circular arc area (R) of the valve body portion ( 12a ) the section maximum outside diameter furthest from the rotary shaft ( 12b . 12c ) in the air channel opening and closing flap ( 12 ) is removed. A damper drive force may correspond to this maximum outer diameter portion of the air passage opening and closing door (FIG. 12 ) via the driven gear ( 24 ) are given. Therefore, as compared with a case where a flap drive force is applied to the rotary shafts (FIG. 12b . 12c ), the intensity of the damper drive force (the torque) is significantly reduced. Therefore, the motor actuator ( 25 ), and further, the manufacturing cost can be reduced.

According to a second aspect of the present invention, in the first aspect, the actuator side gear is an output side gear ( 29 ) of the motor actuator ( 25 ) directly connected to the driven gear ( 24 ) is engaged.

Due to this, the air channel opening and closing flap ( 12 ) directly through the motor actuator ( 25 ) are driven when the output side gear ( 29 ) of the motor actuator ( 25 ) with the in the valve body ( 12a ) self-propelled gear ( 24 ) is engaged. Accordingly, it is possible to reduce the number of parts of the damper drive mechanism, and the construction of the damper drive mechanism of the duct opening and closing device can be simplified.

According to a third aspect of the present invention, in the second aspect, a recess ( 23 ) formed on the circular arc surface (R), and the driven gear ( 24 ) is in the recess ( 23 ) educated.

Due to this, the recess size of the recess ( 23 ) the position at which the driven gear ( 24 ) is formed, in the radial direction of the air channel opening and closing flap ( 12 ) are positioned on the inside. Accordingly, the entire air passage opening and closing device can be further downsized.

According to a fourth aspect of the present invention, in the second or third aspect, the motor actuator ( 25 ) through the housing ( 11 ), and the housing ( 11 ) has a cover ( 31 ) for covering the output side gear ( 29 ).

Due to this, foreign objects can be prevented from getting into an engagement portion formed when the output side gear (FIG. 29 ) and the driven gear ( 24 ) are engaged with each other. Therefore, the gears can mesh with each other in an excellent state.

According to a fifth aspect of the present invention, in the fourth aspect, the actuator ( 25 ) with a to the driven gear ( 24 ) projecting output shaft ( 28 ), the output shaft ( 28 ) is integral with an output side gear ( 29 ), the cover ( 31 ) is one of the housing ( 11 ) different element, and the cover ( 31 ) and the housing ( 11 ) form a storage section ( 31c . 31d . 32c . 32d ) of the output shaft ( 28 ).

Due to this, in a state where the cover ( 31 ) of the housing ( 11 ), both gears ( 24 . 29 ) are easily engaged with each other. Accordingly, the assembling work of assembling the motor actuator ( 25 ) can be effectively achieved.

In the condition in which the cover ( 31 ) with the housing ( 11 ), ie in the state in which both elements are combined with one another, the bearing sections ( 31c . 31d . 32c . 32d ) and the output shaft ( 28 ) can be held in a certain position. Because of this, the size of the engagement of both gears ( 24 . 29 ) and the gears can mesh with each other in an excellent condition.

According to a sixth aspect of the present invention, in the fourth aspect, the motor actuator ( 25 ) with a to the driven gear ( 24 ) projecting output shaft ( 28 ), the output side gear ( 29 ) is integral with the output shaft ( 28 ), and the bearing section ( 32c ) of the output shaft ( 28 ) is only from the housing ( 11 ) educated.

Since the storage section ( 32c ) as described above only from the housing ( 11 ), the dimensional accuracy of the bearing section ( 32c ) higher than that of the fifth aspect. Further, since the bearing portion is not divided into two parts, the operating noise of the bearing portion can be reduced.

According to a seventh aspect of the present invention, in any of the second to sixth aspects, the driven gear is ( 24 ) a worm wheel, and the output side gear ( 29 ) is a snail.

Due to this, a reduction ratio can be increased by the combination of the worm with the worm wheel itself. In addition, it is possible because the worm wheel on the circular arc surface (R) of the valve body ( 12a ) is formed, which the section maxima diameter of the air duct opening and closing flap ( 12 ) is to increase the number of teeth of the worm wheel. Due to the synergy described above, it becomes possible to increase the reduction ratio. As a result, even if a reduction stage in which the worm and the worm gear are combined together, it is possible to obtain a necessary high reduction ratio.

Further, the worm reduction mechanism may be constructed so that the stop positions of the worm and the worm wheel can be maintained at a predetermined position even if an external force is applied from the worm wheel (FIG. 24 ) on the driven side (flap side) on the screw ( 29 ) on the drive side (motor side). Accordingly, even if the external force on the air channel opening and closing flap ( 12 ), the flap is held at the specified position.

In this context, the terminology of the "maximum outside diameter section" of the air channel opening and closing flap ( 12 ) used in this description when the recess ( 23 ) in the third aspect is included in the "maximum outside diameter portion", that is, when a portion recessed by a small amount in the inward radial direction as compared with the maximum outside diameter is included.

According to an eighth aspect of the present invention, in the first aspect, the actuator-side gear consists of a drive gear (FIG. 29 . 33a . 33b ) for transmitting the rotation of the motor actuator ( 25 ) on the driven gear ( 24 . 24a ).

Due to this, in the same manner as in the second aspect, when the driven gears (FIG. 24 . 24a ) directly in the valve body ( 12a ) are themselves designed, the construction of the flap drive mechanism of the air duct opening and closing device can be simplified. Further, the maximum diameter portion of the air channel opening and closing flap (FIG. 12 ) a force is given to the flap over the driven gear ( 24 ) to drive. Therefore, in comparison with a case where the rotary shafts ( 12b . 12c ) is given a force to drive the flap, an intensity of the driving force for driving the flap (torque) are greatly reduced, and the motor actuator ( 25 ) can be downsized and the manufacturing cost can be reduced.

According to a ninth aspect of the present invention, in the eighth aspect, a spur gear (FIG. 24a ) is formed as the driven gear, and the drive gear includes at least the Antriebsstirnrad ( 33b ), which with the driven spur gear ( 24a ) is engaged.

In this context, opens and closes the valve body ( 12a ) the air duct opening and closing flap ( 12 ) the air channels ( 13 . 14 ), while the air ducts ( 13 . 14 ) is exposed. Therefore, the driven gears ( 24 . 24a ) directly in the valve body ( 12a ), also the air ducts ( 13 . 14 ) exposed. Accordingly, foreign objects tend as example in a stream of air contained dust to the driven gears ( 24 . 24a ) to adhere.

For the above reasons, according to the ninth aspect, the driven gear of the valve body (FIG. 12a ) from a spur gear ( 24a ) educated. When the spur gears are engaged with each other, sliding caused between the spur gears is substantially very small. Therefore, compared to a case of the worm gear mechanism in which sliding is intense when the worm and the worm wheel are engaged with each other, increase of sliding friction loss caused when foreign objects adhere to the gear mechanism is very small. For the above reasons, according to the ninth aspect, it is possible to prevent a reduction in transmission power (reduction performance) caused by the sliding friction loss. It is also possible to avoid the occurrence of a problem caused when a noise is generated by the transmission mechanism.

According to a tenth aspect of the present invention, in the eighth aspect, the spur gear is ( 24a ) is formed as the driven gear, the drive gear is from a on the output shaft ( 28 ) of the motor actuator ( 25 ) mounted output gear ( 29 ) and one between the output gear ( 29 ) and the driven spur gear ( 24a ) set intermediate gear ( 33 ), and the intermediate gear ( 33 ) contains at least one drive spur gear ( 33b ), which with the driven spur gear ( 24a ) is engaged.

Because of this, the intermediate gear ( 33 ) between the gears, a gear mechanism with several reduction stages can be between the output gear ( 29 ) of the output shaft ( 28 ) and the driven spur gear ( 24a ) of the valve body ( 12a ) being constructed. Accordingly, the reduction ratio can be increased.

According to an eleventh aspect of the present invention, in the tenth aspect, the output gear is a worm (FIG. 29 ), the intermediate wheel ( 33 ) is with one with the snail ( 29 ) engaged worm wheel ( 33a ), and the worm wheel ( 33a ) is integral with the drive spur gear ( 33b ) Mistake.

by virtue of of which is the reduction gear mechanism on the upstream side in FIG the reduction mechanism having a plurality of stages of a worm gear mechanism educated. Therefore, the reduction ratio of the reduction mechanism on the upstream Page increased become.

According to the worm gear reduction mechanism, even if an external force from the worm wheel (FIG. 33a ) on the downstream side to the screw ( 29 ) on the upstream side (the engine side), the worm is held at the stop position. Accordingly, even if the air channel opening and closing flap ( 12 ) is given an external force, the flap are kept in a certain position.

According to a twelfth aspect of the present invention, in the eleventh aspect, a recessed groove (FIG. 37 ) to avoid interference with the worm wheel ( 33a ) on the circular arc surface (R) of the valve body ( 12a ) educated.

Because of this, since the recessed groove ( 37 ) is provided, the rotary shaft of the worm wheel ( 33a ) close to the side of the valve body ( 12a ) to be ordered. Accordingly, the entire air passage opening and closing device can be downsized.

According to a thirteenth aspect of the present invention, the air duct opening and closing apparatus in the eleventh or twelfth aspect further comprises a cover (FIG. 34a ) for covering the screw ( 29 ) and the worm wheel ( 33a ) on.

Because of this, through the cover ( 34a ) prevents foreign objects from adhering to the engagement portion in which the worm (FIG. 29 ) and the worm wheel ( 33a ) are engaged with each other. Therefore, it is possible to prevent a performance degradation caused by foreign objects adhering to the screw reduction mechanism. It is also possible to prevent the occurrence of a noise generation problem.

According to a fourteenth aspect of the present invention, the air duct opening and closing apparatus in the eleventh or twelfth aspect further comprises a housing ( 38 ) for receiving the motor actuator ( 25 ), the snail ( 29 ) and the worm wheel ( 33a ) on.

by virtue of it is the same as in the thirteenth aspect possible, a by adhering to the screw reduction mechanism Foreign objects caused performance degradation. It is also possible, to prevent the occurrence of a noise generation problem.

Furthermore, the motor actuator ( 25 ), the snail ( 29 ) and the worm wheel ( 33a ) in advance in a housing ( 38 ), and these parts can be mounted as an assembly. Therefore, the dimensional accuracy of the engagement of the screw ( 29 ) with the worm wheel ( 33a ) guaranteed.

According to a fifteenth aspect of the present invention, in the second to fourteenth aspects, the inside air / outside air exchange apparatus (FIG. 10 ) for switching between the inside air and the outside air according to one of the second to fourteenth aspects, wherein the housing (10) 11 ) an interior air introduction opening ( 13 ) and an outside air introduction opening ( 14 ), which are used as an air duct, and the inner air inlet opening ( 13 ) and the outside air introduction opening ( 14 ) are opened and closed by the air channel opening and closing flap.

Due to this, the inside air / outside air changing device ( 10 ) of an air conditioner for a motor vehicle is effectively reduced and the manufacturing cost can be reduced.

According to a sixteenth aspect of the present invention, in the fifteenth aspect, the motor actuator ( 25 ) in a section on the side of the inside air introduction port ( 13 ) in the housing ( 11 ) arranged.

Due to this, it is possible to adhere water and dust contained in a flow of outside air to the motor actuator (FIG. 25 ) to prevent. Accordingly, the occurrence of malfunction of the motor actuator ( 25 ) caused when water and dust adhere to it are suppressed.

According to a seventeenth aspect of the present invention, the automotive air conditioner in the sixteenth aspect comprises: a filter (FIG. 43 ) for cleaning one of the inside air introduction port ( 13 ) and the outside air introduction opening ( 14 ) sucked air in an interior of the circular arc surface (R) of the valve body ( 12a ) is arranged; and one outside the circular arc surface (R) of the valve body ( 12a ) in an open space on the side of the inside air introduction port ( 13 ) in the housing ( 11 ) arranged supporting element ( 11c ), wherein the motor actuator ( 25 ) by the support element ( 11c ) is supported and the support element ( 11c ) at one of the center of the open space on the side of the inside air introduction port ( 13 ) is arranged to the right or left biased position.

Because of this it is even in the design where the motor actuator ( 25 ) by the on the side of the inside air introduction opening ( 13 ) positioned support element ( 11c ) is supported when the support element ( 11c ) is arranged at a position that is biased from the center to the right or left, possible to ensure a large open space, which is used for attaching the filter ( 43 ) on the side of the inside air introduction opening ( 13 ), and removing the filter ( 43 ) from the side of the inside air introduction opening ( 13 ) to ensure.

As a result, the filter ( 43 ) are easily attached and removed without the support element ( 11c ) to remove. Accordingly, the maintenance of the filter ( 43 ) be improved.

by the way Let the reference numbers in brackets denote the above devices show the relationship with the special facilities later in one embodiment of the invention will be described.

The The present invention will become apparent from the following description of preferred embodiments the invention together with the accompanying drawings better understandable.

BRIEF DESCRIPTION OF THE DRAWINGS

It demonstrate:

1 FIG. 12 is a perspective view of the inside / outside air changing device of the first embodiment of the present invention; FIG.

2A a front view of a single body of the 1 illustrated inside air / outside air change flap, wherein the representation is taken from the side of the worm wheel;

2 B a rear view of the single body of the 1 illustrated inside air / outside air change flap;

3A a sectional view of in 1 illustrated inside air / outside air changing device at the gear engagement point;

3B an enlarged sectional view of the flap seal portion;

3C an enlarged sectional view of the flap seal portion;

4 a front view of in 1 illustrated inside air / outside air changing device, wherein the representation is taken from the side of the worm wheel;

5 Fig. 11 is a front view of the inside air / outside air exchange apparatus of the second embodiment of the present invention, taken from the side of the worm wheel;

6 a perspective view of a single body of the inside / outside air exchange door of the third embodiment of the present invention;

7 a perspective view of the inside / outside air exchange apparatus of the fourth embodiment of the present invention;

8th a sectional view taken along a line XX in 9 ;

9 a sectional view of in 7 illustrated inside air / outside air change damper in the central portion in the axial direction, wherein 9 shows a condition in which the cover 34 in 7 has been removed;

10 a partial sectional front view of the mounting structure of the motor actuator and the intermediate gear mechanism, showing the fifth embodiment of the present invention;

11A FIG. 12 is a perspective view of the inside / outside air exchange apparatus constructed according to the sixth embodiment of the present invention; FIG.

11B a front view of the indoor / outdoor air exchange device of 11A wherein the representation is taken from the side of the motor actuator support wall;

11C a side view of 11A ;

12A FIG. 12 is a front view of the inside air / outside air exchange apparatus according to the sixth embodiment of the present invention taken from the side of the motor actuator support wall; FIG.

12B a side view of the inside / outside air exchange apparatus according to the sixth embodiment of the present invention;

13 a sectional view of a main part of the inside / outside air exchange device of the prior art; and

14 an arrangement diagram of a construction of the motor actuator of 13 ,

DESCRIPTION OF PREFERRED EMBODIMENTS

First, the first embodiment will now be explained. 1 to 4 FIG. 13 are illustrations of the first embodiment of the present invention. FIG. In this embodiment, the present invention is applied to an inside / outside air exchange apparatus of an automotive air conditioner. 1 FIG. 10 is a perspective view of an inside / outside air exchange apparatus of the embodiment, and FIG 2 is a representation of a single body of the 1 illustrated inside air / outside air changing device. 3 is a sectional view of a portion in which the gears are engaged, and 4 is a side view of 3 from the right.

The inside air / outside air changing device 10 forms part of the internal air conditioning unit of the air conditioner for a motor vehicle. Usually, the inside air / outside air changing device is 10 disposed within the instrument panel in the front part of a vehicle passenger compartment.

The inside air / outside air changing device 10 contains a housing 11 , which forms an air passage, and an inside air / outside air change door 12 ,

The housing 11 includes an annular housing body 11a , In the upper part of this case body 11a are the dividing wall 11b and the supporting wall 11c integrally formed from synthetic resin. The upper part of the annular housing body 11a is except the sections for both walls 11b . 11c completely open.

In particular, the housing 11 constructed as follows. In 1 is the upper opening part of the housing body 11a through the partition 11b divided in two parts. To the indoor air (the air in the vehicle passenger compartment) in the housing body 11a Initiate forms the right part of the upper opening part of the housing body 11a with respect to the partition 11b the inside air inlet opening 13 , and the left part with respect to the partition wall 11b forms the outside air introduction opening 14 for introducing the outside air (the air outside the vehicle passenger compartment) into the housing body 11a ,

In this case, there is the inside air inlet opening 13 directly in communication with the space in the vehicle passenger compartment. On the other hand, the outside air introduction port 14 connected via a not shown in the drawing Außenluftansaugkanal with the Außenluftansauganschluss, which is provided on the body side. From the outside air intake port provided on the body side, the outside air becomes the outside air introduction port 14 initiated.

In this context show 1 . 3 and 4 a state of the inside air mode in which the outside air introduction port 14 through the inside air / outside air change damper 12 closed and the interior air inlet opening 13 is completely open. Therefore, the inside air / outside air change door overlaps 12 completely with the opening area of the outside air inlet opening 14 ,

The support wall 11c is from the intermediate part of the partition 11b perpendicular to the partition 11b arranged. Accordingly, the inside air introduction port is 13 through the supporting wall 11c further divided into two areas. The support wall 11c is used to support the motor actuator described later 25 used.

As in 2 shown, contains the inside air / outside air change door 12 a valve body 12a and rotary shafts 12b . 12c , wherein the valve body 12a and the rotary shafts 12b . 12c formed integrally from synthetic resin by compression molding. As in 3 shown, is the valve body 12a formed in a shape with the circular arc R whose radius is the specific value r and whose center is the center of rotation P of the rotary shafts 12b . 12c is. In this case, as from the in 1 to 4 illustrated form, the entire shape of the circular arc surface R of the valve body 12a is formed into a spherical shape obtained when a part of the hollow spherical body is in the range of a certain angle θ _a (shown in FIG 3 ) is cut out. This particular angle θ _a is slightly larger than 90 ° in this embodiment.

The rotary shafts 12b . 12c are at both end portions of the valve body in the radial direction of the circular arc R of the valve body 12a forming spherical shape arranged. In the housing body 11a are the bearing sections 15 . 16 each formed of a circular hole at the lower portions of the foot portions of both ends on the partition wall 11b educated. When the rotary shafts 12a . 12c rotatable in these bearing sections 15 . 16 can be used, the inside air / outside air change damper 12 with respect to the housing body 11a be kept rotatable.

To disturb the partition 11b and the supporting wall 11c with the circular arc surface R of the inside air / outside air change damper 12 to avoid are the partition 11b and the supporting wall 11c formed in an arc shape whose radius is slightly larger than the radius r of the circular arc surface R.

At both end portions (the peripheral edge portions) of the valve body 12a in the direction of rotation are the first sealing portion 17 and the second sealing portion 18 each formed by means of integral press forming. As in 3A shown, is the first sealing portion 18 in the end portion of the valve body 12a on the side of the inside air introduction opening 13 formed, and the second sealing portion 17 is in the end portion of the valve body 12a on the side of the outside air inlet opening 14 educated. The first sealing section 17 and the second sealing portion 18 are each formed into a flange shape, that of the end portion of the valve body 12a protrudes outward in the radial direction of the flap diameter by a predetermined length.

Referring to 3B and 3C Now, a more specific construction of the first and second seal portions 17 . 18 explained. 3B is an enlarged partial view of the in 3A shown first sealing portion 17 , FIG. 3C is an enlarged partial view of the in 3A shown second sealing portion 18 , The first and the second sealing portion 17 . 18 are each constructed in such a manner that the arc-like elastic sealing elements 17b . 17c . 18b . 18c on both sides of the stiff flange-shaped sections 17a . 18a integral with the valve body 12a are formed, adhere.

In this case, regarding the specific material of the elastic sealing members 17b . 17c . 18b . 18c for the elastic sealing elements 17b . 17c . 18b . 18c preferably a thermoplastic elastomer used. This thermoplastic elastomer exhibits rubber elasticity at normal temperature. At higher temperatures, this thermoplastic elastomer softens and exhibits flowability (the thermoplasticity). Therefore, the thermoplastic elastomer can be molded in the same manner as a conventional thermoplastic resin. Accordingly, the elastic sealing elements 17b . 17c . 18b . 18c by means of integral compression molding together with the inside / outside air change flap 12 be formed.

On the other hand, in the case body 11a of the housing 11 and the partition 11b the sealing surfaces 19 . 20 . 21 . 22 provided in portions that correspond to the opening edge portions of the inside air introduction port 13 and the outside air introduction port 14 become. In particular, the sealing surface 19 formed in a portion to the opening edge portion of the housing body 11a on the side of the inside air introduction opening 13 in the upper side part becomes. The sealing surface 20 is formed in a portion leading to an opening edge portion on the side of the inside air introduction port 13 in the partition 11b becomes.

The sealing surface 21 is formed in a portion to an opening edge portion on the side of the outside air introduction port 14 in the partition 11b becomes. The sealing surface 22 is formed in a portion to an opening edge portion on the side of the outside air introduction port 14 in the upper side part of the housing body 11a becomes.

When the elastic sealing elements 17b . 17c . 18b . 18c on the side of the inside air / outside air change damper 12 be elastically deformed and with these sealing surfaces 19 to 22 come into contact, the sealing effect can be shown.

Next is the recess 23 in the intermediate part (the intermediate part in the axial direction of the rotary shafts 12b . 12c ) in the radial direction of the circular arc R of the valve body 12a forming spherical shape in the inside air / outside air change damper 12 educated. This recess 23 is formed in the radial direction (the axial direction) of the spherical shape over the entire length. In other words, this recess 23 formed over the entire length in the direction of rotation of the flap.

The driven gear 24 is over the entire length of the bottom part of the recess 23 on the circular arc R of the valve body 12a educated. This driven gear 24 is a worm wheel and is by means of resin molding together with the valve body 12a integrally formed.

On the other hand, the attachment portion 26 for supporting and fixing the motor actuator 25 in a section near the partition 11b in the partition wall section 11c of the housing 11 formed integrally into a rectangular frame shape. In the attachment section 26 is the motor actuator 25 by a fastening means, such as a press fit, an engagement by elastic engagement pawls or a screw, releasably secured.

In the supporting wall section 11c is in the upper part (the part closer to the partition wall section 11b ) of the attachment section 26 the opening window 27 open. This opening window 27 is for inserting the output shaft 28 of the motor actuator 25 from the upper part (outside) of the supporting wall 11c to the lower part (inside) of the supporting wall 11c intended.

As in 3A represented, penetrates the output shaft 28 of the motor actuator 25 the opening window 27 from the upper part of the supporting wall 11c and is to the lower part of the supporting wall 11c arranged at an angle. The front end portion of the output shaft 28 is over the driven gear 24 of the valve body 12a positioned. In the front end portion of the output shaft 28 is integral to the snail 29 which is a helical gear used as a motor output gear. This snail 29 is directly with the driven gear 24 of the valve body 24a engaged.

In this embodiment, the output shaft 28 a shaft made of metal, so as to ensure the mechanical strength, and the worm 29 made of synthetic resin is integral to this output shaft 28 made of metal. However, the snail can 29 also directly on the shaft 28 be formed of metal.

In the intermediate part of the partition 11b of the housing 11 , with which an upper end portion of the support wall 11c is connected, is the opening window 30 (shown in 1 ) through which the snail 29 can run, so formed that the opening window 30 until the above opening window 27 can continue. This opening window 30 is through the cover 31 made of synthetic resin.

Accordingly, when mounting the motor actuator 25 if the cover 31 from the opening window 30 is removed, which is at the output shaft 28 fortified snail 29 through the opening window 30 easy with the driven gear 24 of the valve body 12a be engaged. After both gears 24 . 29 The cover is engaged with each other 31 made of synthetic resin at the peripheral edge portion of the opening window 30 in the partition wall section 11b attached (attached) so as to open the window 30 close. Because of this, the section of the snail 29 (The gear engagement portion) are covered.

In this case, the cover can 31 by means of a fastening device such as an engagement device, in which the elastic engagement pawls are used, or a screw device releasably attached to the partition wall 11b be attached.

In this embodiment, as in FIG 3A and 4 shown, the bearing portion of the output shaft 28 out of the cover 31 and the partition 11b built up. That is, on the cover 31 they are to the output shaft 28 hanging down wall surfaces 31a . 31b in the axial direction of the screw 29 integrally formed on the front and the back. The storage sections 31c . 31d , each consisting of a semi-circular recess and with the upper half of the output shaft 28 are to be engaged are in the lower end portions of the wall surfaces 31a . 31b formed on the front and the back.

On the other hand, as in 3A and 4 shown in the partition wall section 11b to the lower part of the output shaft 28 hanging down wall surfaces 32a . 32b in the axial direction of the screw 29 integrally formed on the front and the back. The storage sections 32c . 32d , each one from the lower half of the output shaft 28 are to be brought into engagement semicircular recess are on the wall surfaces 32a . 32b formed on the front and the back.

By the above construction act in the state in which the cover 31 at the peripheral edge portion of the opening window 30 in the partition wall section 11b attached (attached), the bearing sections 31c . 31d on the side of the cover 31 and the storage sections 32c . 32d on the side of the partition 11b together, and the bearing of the output shaft 28 can be made.

In this embodiment, as a motor of the motor actuator 25 a stepper motor used whose motor operating angle (rotation angle) can be controlled very precisely by the number of impressed impulses. The on the motor of the motor actuator 25 impressed pulses are controlled by a used for air conditioning control unit (not shown), in which is used in microcomputer.

The output shaft 28 is an output shaft of this stepping motor. Therefore, a rotary output of the stepper motor can be directly applied to the output shaft 28 and no reduction gear mechanism is between the output shaft 28 and set the output shaft of this stepping motor.

In 3A is the suction port of a centrifugal blower (not shown) of an internal air conditioning unit at a lower portion of the housing 11 arranged, and in the housing 11 introduced indoor or outdoor air is sucked in by this centrifugal blower. The thus sucked air is sent by the centrifugal blower to a heat exchange section of the inner air-conditioning unit. After the temperature of the thus sent air has been adjusted by the heat exchange portion, the air is blown into the passenger compartment.

Next will be an operation this embodiment explained with the above construction. 1 . 3A and 4 are diagrams showing a state of the inside air mode. At the time of the inside air mode, the elastic sealing member comes 17b (shown in 3B ) of the first seal portion 17 of the valve body 12a in pressure contact with the sealing surface 20 (shown in 1 ) of the partition 11b , and the elastic sealing element 18c (shown in 3C ) of the second seal portion 18 of the valve body 12a comes with the sealing surface 22 (shown in 1 . 3A and 4 ) of the housing body 11a in pressure contact.

Due to this, the outside air introduction port 14 through the inside air / outside air change damper 12 hermetically sealed and the interior air inlet opening 13 be completely opened. Accordingly, when the centrifugal fan not shown in the drawing is driven, the inside air from the inside air introduction port 13 in the case 11 initiated. The thus-introduced air is sent to the heat exchange section of the indoor air-conditioning unit. After the temperature of the air in this heat exchange section has been adjusted, the air is blown into the passenger compartment, so that air conditioning in the vehicle passenger compartment can be performed.

In the case of changing the mode from the inside air mode to the outside air mode, a certain number of pulses are applied to the stepper motor of the motor actuator 25 pressed by the control unit, not shown in the drawing for air conditioning, so that the motor actuator 25 can be rotated by a certain operating angle. The rotation of this motor actuator (stepper motor) 25 is from the output shaft 28 directly on the valve body 12a given when the snail 29 with the on the valve body 12a mounted driven gear (worm wheel) 24 engaged.

In this case, the driven gear 24 in a circular arc shape around the rotation center P of the inside air / outside air change door 12 shaped. Therefore, the valve body 12a quiet around the rotary shafts 12b . 12c be turned when the output shaft 28 is turned.

Here, the direction of rotation of the stepper motor of the motor actuator 25 adjusted so that the valve body 12a in the direction of an arrow A (counterclockwise) in 3A can be turned. Therefore, the valve body 12a rotated by the predetermined angle θ _b , which is determined by the above number of input pulses.

Because of this comes the elastic sealing element 17c of the first seal portion 17 of the valve body 12a with the sealing surface 19 of the housing body 11a in pressure contact, and the elastic sealing element 18c of the second seal portion 18 the valve body comes with the sealing surface 21 the partition 11b in pressure contact. As a result, the inside air introduction port 13 hermetically sealed by the inside air / outside air change flap and the outside air inlet opening 14 be completely opened.

Accordingly, the outside air from the outside air introduction port 14 in the case 11 initiated. After the temperature of the thus introduced outside air has been adjusted by the heat exchange portion of the inside air conditioning unit, the air is blown into the vehicle passenger compartment, so that air conditioning can be performed.

Next, in the case of changing the mode from the outside air mode to the inside air mode, the air conditioning control unit outputs a motor command signal, so that the rotation direction of the stepper motor of the motor actuator 25 can be reversed and a certain number of pulses is applied to the stepper motor. Because of this, the valve body becomes 12a rotated in the direction opposite to the direction of an arrow A by the predetermined angle θ _b determined by the number of previously impressed pulses. In this way, the valve body returns 12a to the in 3A back shown indoor air mode.

In this connection, according to this embodiment, the valve body 12a in a shape with the circular arc surface R whose radius is predetermined to the center of rotation P of the rotary shafts 12b . 12c shaped. The driven gear 24 is at the circular arc R itself of the valve body 12a educated. The at the output shaft 28 of the actuator 25 fortified snail 29 is directly with the driven gear 24 engaged, so that the inside / outside air change door directly through the motor actuator 25 can be driven. Accordingly, the damper drive mechanism can be constructed of a small number of parts. Therefore, the manufacturing cost of the damper drive mechanism can be reduced, and further, the damper drive mechanism can be downsized.

The reduction mechanism is the combination of the worm 29 with the worm wheel (the driven gear) 24 built so that the reduction ratio can be significantly increased. Further, the worm wheel 24 formed near the circular arc surface R, which is the portion of maximum diameter of the inside air / outside air change damper 12 is. By the above construction, the number of teeth of the worm can be rades be enlarged. Therefore, even if the rotational output of the motor actuator is reduced by only one reduction stage, it is possible to obtain a necessary high reduction ratio. Accordingly, it is possible to obtain a necessary force for driving the door.

Since a force for driving the door can be given to a portion near the circular arc surface R, the maximum outside diameter portion of the inside air / outside air change door 12 is, the force for driving the flap (torque) compared to a case in which the force for driving the flap, the rotary shafts 12b . 12c is given, be significantly reduced. Due to this, a lot of electric power can be used to drive the motor of the motor actuator 25 be reduced. Accordingly, the engine can be downsized. Furthermore, the manufacturing cost of the engine can be reduced. In addition, the cost of the motor drive circuit can be reduced.

Furthermore, the worm reduction mechanism can be constructed so that the stop positions of the worm and the worm wheel can be maintained at certain positions even when an external force from the worm wheel 24 on the driven side (flap side) to the screw 29 on the motor side (drive side) is given. Accordingly, even if the external force (eg, an external force passing through the outside air introduction port 14 given dynamic pressure is caused when the vehicle is running, or an external force, which is given by the vibration of the body) of the air duct opening and closing flap 12 is given, the engine side are held in a certain position. Therefore, it is possible to prevent a displacement of the air duct opening and closing flap from a certain position.

According to this embodiment, a recess 23 formed, which is slightly of the circular arc R, which is the section of maximum outside diameter of the inside / outside air change flap 12 is, is recessed, and the driven gear (worm wheel) 24 is at the bottom portion of this recess 23 educated. Therefore, the engagement position at which the driven gear 24 and the snail 29 engage with each other, are shifted by the recess size of the recess to the side of the center of rotation P. Accordingly, the entire inside air / outside air exchange device 10 be downsized.

Furthermore, if the bearing sections 31c . 31d on the cover side 32 and the storage sections 32c . 32d on the partition side 11b combined with each other, so the bearing of the output shaft 28 to form, and the output shaft 28 rotatable by the bearing sections 31c . 31d . 32c . 32d is held, therefore, even if the output shaft 28 shaped into a long and slender shape whose diameter is small, the output shaft 28 be held in a certain position, so that the driven gear 24 and the snail 29 can be safely engaged with each other. Because of this, the gears can 24 . 29 at all times excellently engage with each other.

As the motor actuator 25 in a section on the side of the inside air introduction port 13 the inside air / outside air change damper 10 is arranged, no flow of outside air comes directly to the actuator 25 in contact. Therefore, no water and dust contained in the flow of outside air are supplied to the actuator 25 brought. Accordingly, occurrence of malfunction caused by water and dust can be prevented.

Next, the second embodiment will be explained. In the first embodiment, the bearing sections 31c . 31d on the side of the cover 31 and the storage sections 32c . 32d on the side of the partition 11b combined so as to make the bearing of the output shaft 28 to build. In the second embodiment, however, the bearing section 32c only from the wall surface 32a on the side of the partition 11b formed, and only the foremost end portion of the output shaft 28 is rotatable by this bearing portion 32c held.

In the second embodiment, the in 3A illustrated wall surface 31b overridden. Therefore, when the foremost end portion of the output shaft becomes 28 in the storage section 32c the wall surface 32a is inserted, the insertion work of inserting the output shaft 28 not through the wall surface 32b disturbed.

In this context is in 5 the storage section 32c formed from the circular through hole, which is on the wall surface 32a is provided. However, the storage section is 32c not limited to this through hole. The storage section 32c may be formed in a circular recess with a bottom portion.

According to the second embodiment, the bearing portion 32c only from the wall surface 32a on the side of the partition 11b built up. Therefore, the dimensional accuracy of the bearing section 32c be improved higher than those of the first embodiment. According to the second embodiment, unlike the first embodiment in which the operation sound is generated because the bearing is divided, no operation noise is generated. Therefore, the operating noise of the engine control drive 25 be reduced.

Next, the third embodiment will be explained. According to the first embodiment, the circular arc surface R of the valve body 12a formed into a spherical shape, which is obtained when a part of the hollow spherical body in the range of a certain angle θ _a (shown in FIG 3 ) is cut out. In the third embodiment, however, the circular arc surface R of the valve body 12a formed in a cylindrical surface, as in 6 shown.

In the third embodiment, the circular arc surface R of the valve body 12a formed in a cylindrical surface and the driven gear (worm wheel) 24 is formed directly in the intermediate portion of this circular arc surface R in the axial direction. The fan-shaped side plates 12d . 12e are integrally provided on both end portions of the circular arc surface R in the axial direction, and the rotary shafts 12b . 12c are at the front end portions (the rotation center of the circular arc surface R) of the side plates 12d . 12e provided integrally. The above flap construction can be made by means of an integral molding of synthetic resin.

In the third embodiment, when the screw 29 the output shaft 28 of the motor actuator 25 directly with the at the circular arc R of the valve body 12a trained driven gear (worm wheel) is engaged and the inside air / outside air change door 12 is driven and rotated, the same effect as in the first embodiment can be provided.

Next, the fourth embodiment will be explained. First, the problem to be solved by the fourth embodiment will be explained as follows. In the case of the first embodiment, it is in an upper part of the output shaft 28 attached snail 28 positioned opening section 30 in an intermediate part of the partition 11b of the housing 11 provided, and the cover 31 is at this opening section 30 attached to the opening window 30 close. In this way, the screw section 29 (The gear engagement portion) are covered.

The cover 31 However, only covers a part of the circular arc R of the valve body 12a trained driven gear 24 from, ie the majority of the driven gear 24 is free. Accordingly, foreign objects such as dust tend to be on the driven gear 24 to stick.

In this case, the driven gear 24 a worm wheel with the at the output shaft 28 mounted snail 29 engaged. In the worm gear mechanism, as the friction coefficient between the sliding surfaces of the gear engagement portion becomes larger, sliding friction loss is increased, and the reduction performance is significantly reduced.

Therefore will if the gears packing foreign objects adhering to the worm wheel, the sliding friction loss bigger and the performance is lower. Accordingly, a Strength reduces the drive torque. At the same time, the operating noise of the Gear bigger.

In order to solve the above problems, according to the fourth embodiment, as shown in FIG 7 to 9 shown as at the circular arc R of the valve body 12a the inside air / outside air change damper 12 trained driven gear instead of the worm wheel a spur gear 24a intended. That is, the spur gear 24a which is the driven gear is directly in the central portion in the axial direction of the circular arc surface R of the valve body 12a educated.

7 FIG. 12 is a perspective view of the inside / outside air changing device of the fourth embodiment, and FIG 8th is a sectional view taken along a line XX in FIG 9 , 9 is a sectional view of the central portion (the portion in which the spur gear 24a is formed, in the axial direction of the inside air / outside air change damper 12 , 9 shows a state in which the cover 34 in 7 and 8th is removed.

In the fourth embodiment, the circular arc surface R of the valve body 12a formed in a cylindrical surface in the same manner as in the third embodiment. That's why the fan-shaped side plates are 12d . 12e is integrally provided on both end portions of the circular arc surface R in the axial direction, and the rotary shafts 12b . 12c are integral with the rotational center position of the circular arc surface R on the side plates 12d . 12e intended.

According to the fourth embodiment, since the spur gear 24a , which is the driven gear, on the circular arc surface R of the valve body 12a is formed, the intermediate gear 33 between the spur gear 24a and the at the output shaft 28 attached snail 29 intended.

In particular, this intermediate gear contains 33 a worm wheel 33a that with in the at the output shaft 28 attached snail 29 engaged, and a spur gear 33b that with the spur gear 24a of the valve body 12a engaged, wherein the worm wheel 33a and the spur gear 33b in tegral with the rotary shafts 33c . 33d are provided. A body of this intermediate gear 33 can be made by means of an integral molding of synthetic resin.

In this fourth embodiment, the housing body 11a of the housing 11 shaped into a rectangle, and the semicircular side walls 11d . 11e are integral with the rectangular housing body 11a educated. The auxiliary interior air inlet openings 13a . 13b are in part on the side of the inside air inlet opening 13 on the side walls 11d . 11e educated. 9 is an illustration of a state in which the inside air / outside air change door 12 is rotated to the inside air mode position, in which the inside air introduction opening 13 and the auxiliary indoor air inlet openings 13a . 13b all are open.

In the fourth embodiment, the provided in the first embodiment, the support wall 11c overruled, and the partition 11b for separating the inside air introduction opening 13 and the outside air introduction port 14 of the housing 11 is formed in such a manner that upper parts of the semicircular side walls 11d . 11e are integrally connected to each other.

The opening window 27 (shown in 8th ) is in the middle portion of the direction of the flap shaft of the partition wall 11b trained, and the worm wheel 33a and the spur gear 33b of the intermediate gear 33 are in the section of this opening window 27 arranged. Because of this, the worm wheel 33a to a lower part of the partition 11b protrude, and the spur gear 33b can with the directly on the circular arc R of the valve body 12a trained spur gear 24a engage.

The attachment section 26 is integrally formed in such a manner that the attachment portion 26 from the central portion in the direction of the flap shaft of the partition wall 11b to the side of the inside air introduction opening 13 protrudes. This attachment section 26 is used to carry and attach the motor actuator 25 used. As in 9 is shown, this attachment portion 26 formed into a box shape whose cross section is a rectangular shape, and the top of this attachment portion 26 is open.

The lower half of the motor actuator 25 is in this attachment section 26 added, and the cover 34 is on the upper half of the motor actuator 25 set. Then the cover 34 at the upper end side of the attachment portion 26 by screws 35 attached (shown in 7 and 8th ). In this way, the motor actuator 25 detachable at the attachment portion 26 attached.

In this embodiment, the cover 35 made of synthetic resin. The gearbox cover 34a is integral with the cover 34 educated. As in 8th shown is this gear cover 34a designed so that this gear cover 34a the engaging portion in which the worm 29 the output shaft 28 and the worm wheel 33a of the intermediate gear 33 engage each other, and the engagement portion in which the spur gear 33b of the intermediate gear 33 and the spur gear 23a of the valve body 12a engage with each other, can cover. Accordingly, the transmission cover performs 34a a function corresponding to the cover 31 of the first embodiment.

As in 8th shown, are the bearings 36a . 36b that at both end portions in the axial direction of the intermediate gear 33 positioned rotary shafts 33c . 33d rotatably, through the lower end portion of the gear cover 34a and the upper end of the partition 11b educated.

At both end portions in the circumferential direction of the valve body 12a are the first sealing section 17 and the second sealing portion 18 in a range from the circular arc surface R to the side plates 12d . 12e formed in a substantially U-shape, which has rectangular trimmed corners. In this context is in 8th the second sealing portion 18 as the U-shaped area in which small dots are distributed.

The first sealing section 17 and the second sealing portion 18 are provided in such a manner that the two arcuate elastic sealing elements 17a . 17b . 18a . 18b are each formed into a shape whose cross-section is trapezoidal. These elastic sealing elements 17a . 17b . 18a . 18b are made to be with the sealing surfaces 19 . 20 . 21 . 22 on the side of the case 11 come elastically in pressure contact, so that the sealing effect can be shown. The material and the molding method of the first seal portion 17 and the second seal portion 18 may be the same as those of the first embodiment. The sections in which the sealing surfaces 19 . 20 . 21 . 22 may be the same as those of the first embodiment.

At the circular arc R of the valve body 12a is the spur gear 24a in the circumferential direction except the portions where the first seal portion 17 and the second sealing portion 18 are formed, formed over the entire length. The recessed groove 37 is parallel to the side of the spur gear 24a educated.

This recessed groove 37 is provided so that the worm wheel 33a of the intermediate gear 33 not the circular arc R of the valve body 12a can disturb. That's why the recessed groove has 37 , as in 8th shown, a width greater by a certain size than the width of the worm wheel 33a of the intermediate gear 33 is. Furthermore, the recessed groove 37 such a groove depth that the interference with the worm wheel 33a can be avoided. Furthermore, the recessed groove 37 with respect to the circumferential direction of the circular arc surface R of the valve body 12a over the entire length of the area where the gearwheel 24a is formed, formed (shown in 9 ).

According to the fourth embodiment, the rotation of the output shaft 28 of the motor actuator 25 on the valve body 12a through the engaging portion in which the worm 28 the output shaft 28 and the worm wheel 33a of the intermediate gear 33 engage each other, and through the engaging portion, in which the spur gear 33b of the intermediate gear 33 and the spur gear 24a of the valve body 12a engaged with each other. Therefore, the valve body 12a around the rotary shafts 12c . 12d turned.

In the above-described rotation transmission passage, the engagement portion in which the worm is 29 and the worm wheel 33a engage each other, and the engagement portion, in which the spur gears 33b . 24a engaged with each other, with the gear cover 34a the cover 34 covered. Therefore, it is possible to prevent adhesion of foreign objects such as dust to the engagement portions in which the gears are engaged with each other.

Accordingly, it is possible to prevent the reduction mechanism that is made from the worm 29 and the worm wheel 33a is constructed in such a problem that the reduction performance is degraded by the adhered foreign objects such as dust, and such a problem that a noise is generated by the reduction mechanism is involved. On the other hand, as in 7 shown, the majority of the spur gear 24a of the valve body 12a outside the gearbox cover 34a free. Accordingly, it is unavoidable that foreign objects such as dust on the spur gear 24a adhere.

In the case of the spur gears 33b . 24a However, compared to the case of the worm gear mechanism, a sliding friction loss is substantially small. Therefore, even if foreign matter such as dust, on the spur gear 24a of the valve body 12a attach, the spur gear mechanism compared to the worm gear mechanism influenced less by the deterioration of the reduction performance. Therefore, the deterioration of the reduction performance and the generation of a noise caused by the spur gear 24a adhering foreign matter, are suppressed, and the transmission mechanism can be put into practice.

According to the fourth embodiment, the intermediate gear 33 (the worm gear 33a and the spur gear 33b ) between the screw 29 the output shaft 28 of the motor actuator 25 and the spur gear 24a of the valve body 12a set. That's why it's possible to get out of the snail 29 and the worm wheel 33a constructed to provide first reduction mechanism and also from both spur gears 33b . 24a provided second set reduction mechanism.

Accordingly, in comparison with the first embodiment in which the reduction mechanism is formed of only one stage, the reduction ratio of this embodiment can be increased. Accordingly, the high-speed actuator for the motor actuator 25 be used. Therefore, the degree of freedom in the selection of the motor actuator 25 be extended.

Furthermore, the malfunction of the worm wheel 33a of the intermediate gear 33 with the circular arc surface R by forming the recessed groove 37 on the circular arc R of the valve body 12a avoided. Therefore, the position of the rotary shaft of the intermediate gear 33 ie the position of the motor actuator 25 around the groove depth of the recessed groove 37 close to the valve body 12a to be brought. Due to this, the inside air / outside air changing device can 10 be reduced in total.

In the first embodiment, the stands at the output shaft 28 mounted snail 29 directly with the on a worm wheel of the valve body 12a formed driven gear 24 engaged. That's why the snail needs 29 with the driven gear 24 engaged, and at the same time must the motor actuator 25 outside the range of the rotational curve of the valve body 12a are arranged.

As a result, according to the first embodiment, the length of the output shaft 28 unavoidably extended and the output shaft 28 tends to bend. Accordingly, it becomes difficult to use the output shaft 28 machine with accuracy. Furthermore, since the output shaft 28 Bends, the gears are not exactly engaged with each other, and a tiny vibration is caused.

On the other hand, according to the fourth embodiment, that is at the output shaft 28 mounted gear (the worm 29 ) not directly with the gear (the spur gear 24 ) of the valve body 12a engaged. Therefore, the length of the output shaft 28 be made much shorter than the length of the output shaft of the first embodiment. Accordingly, it is possible to solve such a problem of the first embodiment that the accuracy of machining the output shaft 28 is deteriorating. It is also possible to solve the problem of the first embodiment that the output shaft 28 bends.

Next, the fifth embodiment will be explained. According to the fourth embodiment, the motor actuator 25 and the cover 34 at the attachment portion 26 attached, integral to the partition 11b of the housing 11 is formed, and the bearings 36a . 36b are through the lower end portion of the gear cover 34a , which integral with the cover 34 is formed, and through the upper end side of the partition 11b formed, and further, the rotary shafts 33c . 33d of the intermediate gear 33 rotatable by these bearings 36a . 36b held. However, according to the fifth embodiment, as shown in FIG 10 shown, the motor actuator 25 and the intermediate gear 33 in advance in the exclusive case 38 integrated, so that a mounted body can be formed.

The housing 38 is made of synthetic resin. In this embodiment, the first part housing body 38a and the second sub-housing body 38b obtained when a case body is divided laterally into two pieces, integrally fixed to each other by a fastening means such as screwing or clamping, thus the case 38 to build.

The housing 38 includes a motor receiving section 39 for picking up and fixing the motor actuator 25 and a worm gear receiving section 40 , In this connection, a part of the worm gear receiving portion 40 on average in 10 shown.

The motor receiving section 39 is formed as follows. The upper half of the engine mounting section 39 is in a semi-cylindrical shape along the peripheral surface of the motor actuator 25 shaped, and the plate-shaped mounting brackets 41a . 41b are integral on both sides of the motor receiving portion 39 formed outwardly projecting.

The worm gear receiving section 40 takes the snail 29 the output shaft 28 of the motor actuator 25 and the worm wheel 33a of the intermediate gear 33 on. The rotary shafts 33c . 33d of the intermediate gear 33 are on both sides of the worm wheel 33a educated. The storage sections 42a . 42b for rotatably holding these rotary shafts 33c . 33d are in the worm gear receiving section 40 educated. The spur gear 33b of the intermediate gear 33 protrudes from the worm gear receiving section 40 out.

After the in 10 assembly shown has been assembled, while the outside of the worm gear receiving portion 40 positioned spur gear 33b with the spur gear 24a of the valve body 12a is engaged, the mounting brackets 41a . 41b of the housing 38 on the side of the partition 11b of the housing 11 attached. These mounting brackets 41a . 41b can be secured by well-known fasteners such as screws.

According to the fifth embodiment, the motor actuator 25 and the intermediate gear 33 in advance in the exclusive case 38 installed, so that a mounting body can be built. Therefore, the dimensional accuracy of the part, in which the at the output shaft 28 mounted snail 29 and the worm wheel 33a of the intermediate gear 33 be engaged with each other, simply guaranteed.

Next, the sixth embodiment will be explained. In each embodiment described above, there is no explanation regarding a filter for cleaning an inside / outside air changing device 10 from the inside air introduction port and the outside air introduction port 14 sucked air. Home Making an actual product of the indoor / outdoor air change device 10 However, in many cases, it is in the inside air / outside air changing device 10 a filter having a dust removing function for removing dust contained in the air and also having an air improving function for adsorbing an odor component contained in the air. The sixth embodiment relates to improvements for improving the replacement property (maintenance) of this filter.

11 FIG. 10 is an illustration of an inside / outside air exchange apparatus of the sixth embodiment. FIG. 11A Fig. 3 is a perspective view of an inside / outside air changeover apparatus; 11B FIG. 12 is a front view of the inside air / outside air changeover apparatus taken from the side of the motor actuator support wall, and FIG 11C is a side view of 11A , In this context is 11C a representation of a state in which the Abde ckung 31 in 11A has been removed.

11A FIG. 10 is a view of an inside / outside air exchange apparatus of the first embodiment, which is the air purification filter. FIG 43 is added. This air purification filter 43 is in the interior of the circular arc R of the valve body 12a the inside air / outside air change damper 12 arranged. The entire air purification filter 43 is shaped into a circular truncated cone.

The filter is in the interior of the circular arc R of the valve body 12a arranged so that the end portion of the small diameter side (the upper end portion in the drawing) 43a of the filter 43 can be positioned on the central portion side of the circular arc surface R, and that the large diameter end portion (the one under the end portion) 43b of the filter 43 on the side of the rotary shafts 12b . 12c the inside air / outside air change damper 12 can be positioned. The end section on the side of the small diameter 43a of the filter 43 is closed. On the other hand, the end section 43a on the large diameter side 43a of the filter 43 open.

The end section on the side of the large diameter 43b of the filter 43 is at the in the annular housing body 11a of the housing 11 formed annular mounting surface 44 arranged and releasably secured. Regarding the releasable attachment structure of the filter 43 an example will be described as follows. An annular frame portion whose rigidity is higher than the rigidity of the filter material is in the large diameter side end portion 43b of the filter 43 provided, and between the annular frame portion of the filter 43 and the annular attachment surface 44 on the side of the housing 11 For example, an engagement mechanism may be provided in which pawls are engaged with each other when the filter is rotated.

The air passage hole 44a is in the middle of the annular attachment surface 44 on the side of the case 11 educated. That's why the interior of the filter stands 43 with the suction side of a centrifugal blower, not shown, through this air passage hole 44a in connection.

Due to this, it passes from the inside air introduction port 13 and the outside air introduction port 14 sucked air through the filter 43 whose shape is a circular truncated cone, so that the air through the filter 43 can be cleaned. The so purified air is from the interior of the filter 43 by the at the annular mounting surface 44 trained air passage hole 44a sucked in a not shown centrifugal fan.

In this context, in the in 11 shown construction, ie in the construction of the first embodiment, as in 11B shown in the middle of the case 11 more precisely in the middle on the side of the inside air introduction opening 13 the partition 11b of the housing 11 the supporting wall 11c for carrying and fixing the motor actuator 25 arranged.

In this context, the reason why the retaining wall 11c on the side of the inside air introduction opening 13 is arranged as described below. As described above, the motor actuator 25 on the side of the inside air introduction opening 13 arranged so as to adhere water contained in an outside air flow and dust to the motor actuator 25 to prevent.

Therefore, the open space is on the side of the inside air introduction port 13 through the partition 11b divided into two parts, and the single open space becomes small.

As a result, the support wall section interferes 11c Located in the middle of the open space at the interior air intake opening 13 is positioned when checking and replacing the filter 43 the work, when the filter is attached and detached, ie the handling of attaching and loosening the filter is significantly deteriorated.

Therefore, it can be considered that the supporting wall 11c separate from the housing 11 is formed and the supporting wall 11c when attaching or detaching the filter from the housing 11 is removed so as to fix the filter or to solve. However, since the motor actuator 25 through the supporting wall 11c held and attached to it, it becomes when attaching or loosening the retaining wall 11c also necessary, the motor actuator 25 to install or to solve. Therefore, replacing the filter 43 significantly worsened.

Accordingly, in the sixth embodiment, as in FIG 12A represented, the supporting wall 11c at one of the middle of the housing 11 arranged right or left offset position, in particular, the support wall 11c at one of the center of the open space on the side of the inside air introduction port 13 the partition 11b arranged to the right or left offset position so that a more open space on one side of the supporting wall 11c can be formed.

In the in 12A example shown is the supporting wall 11c at one of the middle of the housing 11 arranged in the drawing to the left offset position. Therefore, a wider open space in the drawing on the right side of the retaining wall 11c be formed. As a result can by using the right of the retaining wall 11c formed wide open space attaching and detaching the filter 43 be easily executed from the inside of the vehicle passenger compartment.

Therefore, in the inside / outside air changeover apparatus in which the motor actuator 25 on the side of the inside air introduction opening 13 is arranged and the inside air / outside air change flap 12 directly driven, the filter 43 without removing the retaining wall 11c for holding the motor actuator 25 simply attached or detached, and replacing the filter 43 can be improved.

In this context, contrary to in 12A illustrated example, the supporting wall 11c of course also at one of the middle of the case 11 be arranged in the drawing to the right staggered position. The shape of the filter 43 is not limited to a circular truncated cone. The shape of the filter 43 may be a hood shape (hemisphere) or another shape. The filter 43 can also have a waveform.

• (1) Im ersten und zweiten Ausführungsbeispiel ist die Aussparung 23 an der Kreisbogenfläche R des Klappenkörpers 12a ausgebildet, und das angetriebene Zahnrad (das Schneckenrad) 24 ist im Bodenteil der Aussparung 23 ausgebildet. Auf die Aussparung 23 kann jedoch in der gleichen Weise wie beim dritten Ausführungsbeispiel auch im ersten und im zweiten Ausführungsbeispiel verzichtet werden, und das angetriebene Zahnrad (das Schneckenrad) 24 kann direkt auf der Kreisbogenfläche R ausgebildet sein.
• (2) Im ersten Ausführungsbeispiel wird als Motor des Motorstellantriebs 25 ein Schrittmotor verwendet, dessen Motorbetriebswinkel (der Drehwinkel) durch die Anzahl aufgedrückter Impulse gesteuert werden kann. Jedoch kann als Motor des Motorstellantriebs 25 auch ein Gleichstrommotor benutzt werden. Bei der Verwendung des Gleichstrommotors kann, wenn eine Klappenerfassungseinrichtung (zum Beispiel ein Potentiometer oder Codierer) an der Ausgangswelle 28 angeordnet ist, die Klappenposition genau erfasst werden. Da die Schnecke 29 der Ausgangswelle 28 direkt mit dem angetriebenen Zahnrad 24 des Klappenkörpers 12a in Eingriff steht, entspricht die Drehstellung der Ausgangswelle 28 hochgenau der Klappenposition. Aufgrund dessen kann die Klappenposition hochgenau durch die an der Ausgangswelle 28 montierte Klappenpositionserfassungseinrichtung erfasst werden.
• (3) Gemäß dem ersten Ausführungsbeispiel werden der erste und der zweite Dichtungsabschnitt 17, 18 des Klappenkörpers 12a gebildet, wenn die integral in dem Klappenkörper 12a ausgebildeten Flanschabschnitte 17a, 18a mit den elastischen Dichtungselementen 17b, 17c, 18b, 18c aus thermoplastischem Elastomer kombiniert werden. Anstelle der elastischen Dichtungselemente 17b, 17c, 18b, 18c aus thermoplastischem Elastomer kann jedoch auch ein elastisches Dichtungsmaterial aus einem porösen elastischen Dichtungsmaterial verwendet werden, und dieses elastische Dichtungsmaterial kann auf beide Seiten der Flanschabschnitte 17a, 18a geklebt sein.
• (4) Die elastischen Dichtungselemente 17b, 17c, 18b, 18c müssen nicht in dem ersten und dem zweiten Dichtungselement 17, 18 des Klappenkörpers 12a angeordnet sein, und die elastischen Dichtungselemente können auch an den Dichtflächen 19 bis 22 des Gehäusekörpers 11a angeordnet sein.
• (5) In den oben beschriebenen Ausführungsbeispielen ist die vorliegende Erfindung auf die Innenluft/Außenluft-Wechselvorrichtung 10 angewendet. Es sollte jedoch beachtet werden, dass die vorliegende Erfindung allgemein auch auf eine andere Luftkanal-Öffnungs- und Schließvorrichtung als die Innenluft/Außenluft-Wechselvorrichtung 10 angewendet werden kann. Zum Beispiel kann die vorliegende Erfindung auf eine Auslass-Öffnungs- und Schließvorrichtung zum Öffnen und Schließen mehrerer Auslässe einer Klimaanlage für ein Kraftfahrzeug angewendet werden. Ferner kann die vorliegende Erfindung auf Luftkanal-Öffnungs- und Schließvorrichtungen angewendet, die für verschiedene Zwecke außer einer Klimaanlage für ein Kraftfahrzeug benutzt werden.

Finally, further embodiments will now be explained. The present invention is not limited to the above specific embodiments. Variations may be made, for example, as follows.

• (1) In the first and second embodiments, the recess 23 on the circular arc R of the valve body 12a formed, and the driven gear (the worm wheel) 24 is in the bottom part of the recess 23 educated. On the recess 23 however, in the same way as in the third embodiment, also in the first and second embodiments, and the driven gear (the worm wheel) can be dispensed with; 24 can be formed directly on the circular arc surface R.
• (2) In the first embodiment, as the motor of the motor actuator 25 uses a stepping motor whose motor operating angle (the rotation angle) can be controlled by the number of impressed pulses. However, as a motor of the motor actuator 25 also a DC motor can be used. When using the DC motor, if a flap detector (eg, a potentiometer or encoder) can be attached to the output shaft 28 is arranged, the flap position can be detected accurately. Because the snail 29 the output shaft 28 directly with the driven gear 24 of the valve body 12a is engaged, corresponds to the rotational position of the output shaft 28 highly accurate the flap position. Due to this, the damper position can be accurately adjusted by that on the output shaft 28 mounted flap position detecting device are detected.
• (3) According to the first embodiment, the first and second seal portions 17 . 18 of the valve body 12a formed when the integral in the valve body 12a formed flange sections 17a . 18a with the elastic sealing elements 17b . 17c . 18b . 18c be combined from thermoplastic elastomer. Instead of the elastic sealing elements 17b . 17c . 18b . 18c however, an elastic sealing material made of a porous elastic sealing material may be used in thermoplastic elastomer, and this elastic sealing material may be applied to both sides of the flange portions 17a . 18a be glued.
• (4) The elastic sealing elements 17b . 17c . 18b . 18c do not need in the first and second sealing element 17 . 18 of the valve body 12a can be arranged, and the elastic sealing elements can also on the sealing surfaces 19 to 22 of the housing body 11a be arranged.
• (5) In the above-described embodiments, the present invention is to the inside / outside air changeover apparatus 10 applied. It should be noted, however, that the present invention generally also refers to a different air channel opening and closing device than the inside air / outside air changing device 10 can be applied. For example, the present invention may be applied to an exhaust opening and closing device for opening and closing a plurality of outlets of an air conditioner for an automobile. Further, the present invention can be applied to air duct opening and closing devices which are used for various purposes other than an air conditioner for a motor vehicle.

While the Invention with reference to specific embodiments for illustrative purposes It should be apparent to those skilled in the art be that numerous modifications are made to it can, without to abandon the scope of the invention, by the appended claims is defined.

Claims (17)

Air duct opening and closing device, with a housing ( 11 ) for forming an air channel ( 13 . 14 ); an air duct opening and closing flap ( 12 ) for opening and closing the air duct ( 13 . 14 ); and a motor actuator ( 25 ) for driving the air channel opening and closing flap ( 12 ), wherein the air channel opening and closing flap ( 12 ) a rotary shaft ( 12b . 12c ) rotatably mounted on the housing ( 11 ) and a valve body ( 12a ) for opening and closing the air duct ( 13 . 14 ), the valve body ( 12a ) has a circular arc surface (R) whose radius is predetermined and which is about the rotary shaft ( 12b . 12c ) is formed, a driven gear ( 24 ) on the circular arc surface (R) itself of the valve body ( 12a ) is formed, and a through the motor actuator ( 25 ) driven actuator-side gear with the driven gear ( 24 ) is engaged so as to open the air channel opening and closing flap ( 12 ) by the motor actuator ( 25 ) to drive. An air duct opening and closing device according to claim 1, wherein the actuating-side gear is an output gear ( 29 ) of the motor actuator ( 25 ), which is directly connected to the driven gear ( 24 ) is engaged. Air duct opening and closing device according to claim 2, wherein a recess ( 23 ) is formed on the circular arc surface (R) and the driven gear ( 24 ) in the recess ( 23 ) is trained. Air duct opening and closing device according to claim 2 or 3, wherein the motor actuator ( 25 ) through the housing ( 11 ) and the housing ( 11 ) a cover ( 31 ) for covering the output gear ( 29 ) having. Air duct opening and closing device according to claim 4, wherein the actuator ( 25 ) with a to the driven gear ( 24 ) projecting output shaft ( 28 ), the output shaft ( 28 ) integral with an output gear ( 29 ), the cover ( 31 ) one of the housing ( 11 ) is different element, and the cover ( 31 ) and the housing ( 11 ) a storage section ( 31c . 31d . 32c . 32d ) of the output shaft ( 28 ) form. An air duct opening and closing device according to claim 4, wherein the motor actuator ( 25 ) with a to the driven gear ( 24 ) projecting output shaft ( 28 ), the output gear ( 29 integral with the output shaft (FIG. 28 ), and the bearing section ( 32c ) of the output shaft ( 28 ) only from the housing ( 11 ) is formed. Air duct opening and closing device according to one of claims 2 to 6, wherein the driven gear ( 24 ) is a worm gear and the output gear ( 29 ) is a snail. An air duct opening and closing apparatus according to claim 1, wherein the actuating gear side gear comprises a drive gear (10). 29 . 33a . 33b ) for transmitting the rotation of the motor actuator ( 25 ) on the driven gear ( 24 . 24a ) is formed. Air duct opening and closing device according to claim 8, in which the spur gear ( 24a ) is formed as the driven gear and the drive gear at least that with the driven spur gear ( 24a ) in engagement drive spur gear ( 33b ) contains. Air duct opening and closing device according to claim 8, in which the spur gear ( 24a ) is formed as the driven gear, the drive gear from a on the output shaft ( 28 ) of the motor actuator ( 25 ) mounted output gear ( 29 ) and one between the output gear ( 29 ) and the driven spur gear ( 24a ) set intermediate gear ( 33 ) is formed, and the intermediate gear ( 33 ) at least one with the driven spur gear ( 24a ) engaged drive spur gear ( 33b ) contains. An air duct opening and closing device according to claim 10, wherein the output gear is a worm ( 29 ) is the intermediate gear 133 ) with one with the snail ( 29 ) engaged worm wheel ( 33a ), and the worm wheel ( 33a ) integral with the drive spur gear ( 33b ) is provided. Air duct opening and closing device according to claim 11, wherein a recessed groove ( 37 ) to avoid the interference with the worm wheel ( 33a ) on the circular arc surface (R) of the valve body ( 12a ) is trained. Air duct opening and closing device according to claim 11 or 12, further comprising a cover ( 34a ) for covering the screw ( 29 ) and the worm wheel ( 33a ). An air channel opening and closing device according to claim 11, further comprising a housing ( 38 ) for receiving the motor actuator ( 25 ), the snail ( 29 ) and the worm wheel ( 33a ). An air conditioner for a vehicle, comprising an air duct opening and closing device in which the inside air / outside air changing device ( 10 ) is provided for switching between the inside air and the outside air according to one of claims 2 to 14, wherein the housing ( 11 ) an interior air introduction opening ( 13 ) and an outside air introduction opening ( 14 ), which are used as an air duct, and the inner air inlet opening ( 13 ) and the outside air introduction opening ( 14 ) through the air channel opening and closing flap ( 12 ) are opened and closed. Air conditioning system for a vehicle according to claim 15, in which the motor actuator ( 25 ) in a section on the side of the inside air introduction port ( 13 ) in the housing ( 11 ) is arranged. Air conditioning system for a vehicle according to claim 16, with a filter ( 43 ) for cleaning one of the inside air introduction port ( 13 ) and the outside air introduction opening ( 14 ) sucked air in an interior of the circular arc surface (R) of the valve body ( 12a ) is arranged; and one outside the circular arc surface (R) of the valve body ( 12a ) in an open space on the side of the inside air introduction port ( 13 ) in the housing ( 11 ) arranged supporting element ( 11c ), wherein the support element ( 11c ) at one of the center of the open space on the side of the inside air introduction port ( 13 ) is arranged to the right or left offset position.