JP2008285089A - Air passage opening/closing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent or suppress wind leakage from between end seal surfaces and an end seal portion. <P>SOLUTION: In this air passage opening/closing device, the end seal surfaces 13, 14 are formed on a wall surface on the side of the end portion of a door member 2 in a moving direction, in the wall surface surrounding openings 11, 12; and the end seal portion 211 abutting on the end seal surfaces 13, 14 when the door member 2 is in a position closing the openings 11, 12 are formed on the side of the end of the door member 2 in the moving direction in the door member 2. In the portion of a driven gear 22 formed on the door member 2, which is meshed with a driving gear 3 when the door member 2 is in the position closing the openings 11, 12, dedendums are formed shorter than the other portion. Thereby, when the door member 2 is in the position closing the openings 11, 12, the portion of the driven gear 22, having shorter dedendums, is meshed with the driving gear 3. Therefore, the end seal portion 211 is pushed to the end seal surfaces 13, 14 to improve sealing property. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an air passage opening and closing device that opens and closes an opening by a plate-like door member, and is suitable for use in a vehicle air conditioner.

  As an air passage opening and closing device in a conventional vehicle air conditioner, those shown in FIGS. 4 to 6 have been put into practical use. 4 is a perspective view of the air passage opening / closing device, FIG. 5 is a sectional view of the air passage opening / closing device, and FIG. 6 is an enlarged sectional view of a portion C in FIG.

  This conventional air passage opening and closing device is arranged in an air passage of an indoor unit in a vehicle air conditioner, and two openings 11 and 12 are provided in parallel to the case 1, and the openings 11 and 12 On the windward side, a plate-like door member 2 that rotates in a direction orthogonal to the air flow direction and along the direction in which the openings 11 and 12 are arranged is provided. The door member 2 includes a plate-like door portion 21 that opens and closes the openings 11 and 12, and a driven gear 22 that extends along the moving direction of the door member 2. The drive gear 3 is disposed on the windward side of the driven gear 22, and the door member 2 is driven by meshing the drive gear 3 with the driven gear 22.

  Furthermore, the end seal surfaces 13 and 14 are formed on the wall surface on the door member movement direction end side of the wall surfaces surrounding the openings 11 and 12, and the door member 2 has a protruding end portion on the door member movement direction end side. When the seal portions 211 and 212 are formed and the door member 2 is in a position to close the second opening 12, the first end seal portion 211 contacts the first end seal surface 13, and the door member 2 is in the first opening. The second end seal portion 212 comes into contact with the second end seal surface 14 when the position 11 is closed. Further, the end seal surfaces 13 and 14 have a distance from the rotation center of the door member 2 changing along the moving direction of the door member 2.

  However, the end seal surfaces 13 and 14 of the above-described conventional air passage opening and closing device have the door member 2 stopped because the distance from the rotation center of the door member 2 changes along the moving direction of the door member 2. Due to the variation in position, the end seal portions 211 and 212 may not contact the end seal surfaces 13 and 14, and in this case, the end seal surfaces 13 and 14 and the end seal portions 211 and 212 may not be in contact with each other. There was a problem that a gap was generated in the wall, and as a result, a wind leak occurred.

  In view of the above points, an object of the present invention is to prevent or suppress wind leakage from between an end seal surface and an end seal portion.

  In the first feature of the present invention, the opening (11, 12) is moved in a direction perpendicular to the air flow direction and the opening (11, 12) is opened and closed by the case (1) provided in the air passage. The end seal surface (13, 14) is formed on the wall surface of the door member (2) in the moving direction end portion of the wall surface surrounding the opening (11, 12). In the door member (2), the end of the door member (2) in the moving direction is on the end seal surface (13, 14) when the door member (2) is in a position to close the opening (11, 12). An air passage opening and closing device including end seal portions (211 and 212) that contact each other, a driven gear (22) formed on the door member (2) along the moving direction of the door member (2), and an end portion Drive teeth arranged at positions facing the seal surfaces (13, 14) and meshing with the driven gear (22) (3), and the portion of the driven gear (22) that meshes with the drive gear (3) when the door member (2) is in the position to close the opening (11, 12) is more toothed than the other portion. The original bamboo is made smaller.

  In such a configuration, when the door member (2) is in a position to close the openings (11, 12), the portion of the driven gear (22) with a small tooth root meshes with the drive gear (3). The seal part (211 and 212) is pressed against the end seal surface (13 and 14) to improve the sealing performance, and between the end seal part (211 and 212) and the end seal surface (13 and 14). Wind leakage from the air is prevented or suppressed.

  In the second feature of the present invention, the opening (11, 12) is moved in a direction perpendicular to the air flow direction and the opening (11, 12) is opened and closed by the case (1) provided in the air passage. The end seal surface (13, 14) is formed on the wall surface of the door member (2) in the moving direction end portion of the wall surface surrounding the opening (11, 12). In the door member (2), the end of the door member (2) in the moving direction is on the end seal surface (13, 14) when the door member (2) is in a position to close the opening (11, 12). An air passage opening and closing device including end seal portions (211 and 212) that contact each other, a driven gear (22) formed on the door member (2) along the moving direction of the door member (2), and an end portion Drive teeth arranged at positions facing the seal surfaces (13, 14) and meshing with the driven gear (22) (3), and the portion of the driven gear (22) that meshes with the drive gear (3) when the door member (2) is in the position to close the opening (11, 12) is more toothed than the other portion. The tip is increased.

  In such a configuration, when the door member (2) is in a position to close the openings (11, 12), a portion of the driven gear (22) having a large tooth tip meshes with the drive gear (3). The seal part (211 and 212) is pressed against the end seal surface (13 and 14) to improve the sealing performance, and between the end seal part (211 and 212) and the end seal surface (13 and 14). Wind leakage from the air is prevented or suppressed.

  In addition, the code | symbol in the bracket | parenthesis of each means described in a claim and this column shows the correspondence with the specific means as described in embodiment mentioned later.

  An embodiment of the present invention will be described. 1 is a cross-sectional view of an air passage opening and closing apparatus according to an embodiment, FIG. 2 is an enlarged cross-sectional view of a portion A of FIG. 1, and FIG.

  This air passage opening and closing device is arranged in an air passage of an indoor unit (not shown) in a vehicle air conditioner. As shown in FIGS. Two openings 11 and 12 that circulate are formed in parallel to the air flow B. The first opening 11 and the second opening 12 are rectangular and congruent. The first opening 11 is connected to a foot outlet (not shown), and the second opening 12 is connected to a face outlet (not shown).

  On the windward side of the first opening 11 and the second opening 12, a resin door that rotates in a direction orthogonal to the air flow direction and along the direction in which the first opening 11 and the second opening 12 are arranged. A member 2 is provided. The door member 2 includes a plate-like door portion 21 that opens and closes the first opening portion 11 and the second opening portion 12, and a driven gear 22 that extends along the moving direction of the door member 2. The center of the driven gear 22 coincides with the rotation center of the door member 2.

  Of the wall surfaces of the case 1 surrounding the first opening portion 11 and the second opening portion 12, the wall surface on the door member moving direction end side side, more specifically, between the first opening portion 11 and the second opening portion 12. A first end seal surface 13 and a second end seal surface 14 are formed on the positioned wall surface.

  The door portion 21 includes two end seal portions 211 and 212 that protrude toward the wall surface side of the case 1 surrounding the first opening portion 11 and the second opening portion 12. The end seal portions 211 and 212 are located in the vicinity of both ends in the door member moving direction on the opening facing surface 213 of the door portion 21 facing the first opening 11 and the second opening 12. Further, the end seal portions 211 and 212 extend in the width direction of the door portion 21 (that is, the direction orthogonal to both the door member moving direction and the air flow direction).

  Of the two end seal portions 211 and 212, the first end seal portion 211 located on the first opening 11 side is the first end portion when the door member 2 is at the position where the second opening 12 is closed. The second end seal portion 212 that is in contact with the seal surface 13 and is located on the second opening portion 12 side of the two end seal portions 211 and 212 is in a position where the door member 2 closes the first opening portion 11. The second end seal surface 14 is in contact with the second end seal surface 14.

  A drive gear 3 made of resin is disposed on the windward side of the driven gear 22 and at a position facing the first end seal surface 13 and the second end seal surface 14, and the drive gear 3 is meshed with the driven gear 22 to open the door. The member 2 is driven. The drive gear 3 is rotatably supported by the case 1 and is driven by a drive source (not shown) (for example, a servo motor). Note that the axis of the drive gear 3 is parallel to the width direction of the door portion 21.

  When the air passage opening and closing device is viewed along the width direction of the door portion 21, the wall surface of the case 1 surrounding the first opening portion 11 and the second opening portion 12, the opening facing surface 213 of the door portion 21, and the first end portion. The seal surface 13 and the second end seal surface 14 are each formed in an arc shape that is convex toward the downstream side of the air flow.

  And the curvature center of the wall surface of case 1 surrounding the 1st opening part 11 and the 2nd opening part 12, the curvature center of the opening part opposing surface 213, the curvature center of the 1st edge part sealing surface 13 and the 2nd edge part sealing surface 14 Are coincident with the rotation center of the door member 2. Therefore, although the distance from the rotation center of the door member 2 is changing along the moving direction of the door member 2, the end seal surfaces 13 and 14 of the conventional apparatus change the first end seal surface 13 of the present embodiment. The second end seal surface 14 has a constant distance from the center of rotation of the door member 2.

  As shown in FIG. 3, the driven gear 22 varies the root circle radius Rr depending on the position, so that the root Hf (that is, the radial difference between the pitch circle radius R0 and the root circle radius Rr) depends on the position. It is different.

  More specifically, in the driven gear 22, the root circle radius Rr1 in the vicinity of both end portions in the door member moving direction is smaller than the root circle radius Rr2 of other portions. As a result, the driven gear 22 has a tooth root Hf1 in the vicinity of both end portions in the door member moving direction that is smaller than the tooth root Hf2 of the other portion.

  Then, within the variation range of the stop position of the door member 2, the driven gear 22 is configured such that a portion of the driven gear 22 having a small tooth root (ie, a portion having a tooth root Hf 1) meshes with the drive gear 3. Among these, the installation range of the part where the base of the tooth is small is set.

  Further, when a portion of the driven gear 22 having a small tooth root is engaged with the drive gear 3, the first end seal portion 211 is pressed against the first end seal surface 13, or the second The tooth base Hf1 is set so that the end seal portion 212 is pressed against the second end seal surface 14.

  On the other hand, when a portion of the driven gear 22 having a large tooth root (that is, a portion having a tooth root Hf2) meshes with the drive gear 3, the first end seal portion 211 and the first end seal The tooth depth Hf2 is set so that a gap is formed with the surface 13 or a gap is formed between the second end seal portion 212 and the second end seal surface 14. is doing.

  Next, the operation of the air passage opening / closing device will be described. When the drive gear 3 is driven by the drive source, the door member 2 moves in the door member moving direction (that is, the direction in which the first opening portion 11 and the second opening portion 12 are aligned) by meshing between the drive gear 3 and the driven gear 22. Moving.

  As shown in FIGS. 1 and 2, the door member 2 is moved and stopped most toward the second opening 12 side in the door member moving direction, that is, the first end seal portion 211 is the first end. In the state of contact with the partial seal surface 13, the first opening portion 11 is fully opened, and the second opening portion 12 is covered with the door portion 21 and is fully closed.

  At this time, a portion of the driven gear 22 having a small tooth root (that is, a portion having a tooth root Hf1) meshes with the drive gear 3, and therefore the portion of the driven gear 22 having a large tooth root ( That is, the first end seal surface 13 and the second end seal surface 14 of the door member 2 are closer to the drive gear 3 than when the tooth root Hf2 is engaged with the drive gear 3. Pushed to the side. As a result, the first end seal portion 211 is pressed against the first end seal surface 13 to improve the sealing performance, and air leakage from between the first end seal portion 211 and the first end seal surface 13 occurs. Is prevented or suppressed.

  In addition, since the first end seal surface 13 has a constant distance from the rotation center of the door member 2, the first end portion with respect to the first end seal surface 13 can be obtained even if the stop position of the door member 2 varies. The pressing force of the seal part 211 is stabilized, and a stable sealing property is obtained.

  On the other hand, in a state where the door member 2 is most moved to the first opening 11 side in the door member moving direction and stopped, that is, in a state where the second end seal portion 212 is in contact with the second end seal surface 14. The second opening 12 is fully opened, and the first opening 11 is covered with the door 21 and is fully closed.

  At this time, a portion of the driven gear 22 having a small tooth base meshes with the drive gear 3, and portions of the door member 2 close to the drive gear 3 are the first end seal surface 13 and the second end seal surface 14. Pushed to the side. As a result, the second end seal portion 212 is pressed against the second end seal surface 14 to improve the sealing performance, and air leakage from between the second end seal portion 212 and the second end seal surface 14 occurs. Is prevented or suppressed.

  In addition, since the second end seal surface 14 has a constant distance from the rotation center of the door member 2, the second end portion with respect to the second end seal surface 14 even if the stop position of the door member 2 varies. The pressing force of the seal portion 212 is stabilized, and a stable sealing property is obtained.

(Other embodiments)
In the above embodiment, the tooth root of the driven gear 22 is made different depending on the position, but the tooth end edge of the driven gear 22 (that is, the radius difference between the tip circle radius and the pitch circle radius R0) is made different depending on the position. May be. Specifically, when the door member 2 is in a position where the first opening 11 or the second opening 12 is closed, a portion of the driven gear 22 having a large tooth tip is engaged with the drive gear 3.

  In the above embodiment, an apparatus having two openings 11 and 12 is shown. However, the present invention can also be applied to an apparatus having one opening.

  Furthermore, in the said embodiment, although the apparatus which the door member 2 rotationally moves was shown, this invention is applicable also to the apparatus with which the door member 2 reciprocates linearly.

It is sectional drawing of the air passage opening / closing apparatus which concerns on one Embodiment of this invention. It is an expanded sectional view of the A section of FIG. It is an expanded sectional view which shows the door member 2 single-piece | unit of FIG. It is a perspective view of the conventional air passage opening and closing device. It is sectional drawing of the conventional air passage opening / closing apparatus. It is an expanded sectional view of the C section of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Case, 2 ... Door member, 3 ... Drive gear, 11, 12 ... Opening part, 13, 14 ... End seal surface, 22 ... Driven gear, 211, 212 ... End seal part.

Claims (2)

A case (1) in which openings (11, 12) are provided in the air passage;
A plate-like door member (2) that moves in a direction perpendicular to the air flow direction to open and close the opening (11, 12);
An end seal surface (13, 14) is formed on the wall surface on the end side in the moving direction of the door member (2) among the wall surfaces surrounding the openings (11, 12).
When the door member (2) is in a position where the door member (2) closes the opening (11, 12), the end seal surface (13, 14) an air passage opening and closing device provided with end seal portions (211 and 212) in contact with 14),
A driven gear (22) formed on the door member (2) along the moving direction of the door member (2);
A drive gear (3) disposed at a position facing the end seal surface (13, 14) and meshing with the driven gear (22);
Of the driven gear (22), the portion that meshes with the drive gear (3) when the door member (2) is in the position to close the opening (11, 12) has a tooth root more than other portions. An air passage opening and closing device characterized by being small. A case (1) in which openings (11, 12) are provided in the air passage;
A plate-like door member (2) that moves in a direction perpendicular to the air flow direction to open and close the opening (11, 12);
An end seal surface (13, 14) is formed on the wall surface on the end side in the moving direction of the door member (2) among the wall surfaces surrounding the openings (11, 12).
When the door member (2) is in a position where the door member (2) closes the opening (11, 12), the end seal surface (13, 14) an air passage opening and closing device provided with end seal portions (211 and 212) in contact with 14),
A driven gear (22) formed on the door member (2) along the moving direction of the door member (2);
A drive gear (3) disposed at a position facing the end seal surface (13, 14) and meshing with the driven gear (22);
Of the driven gear (22), the portion that meshes with the drive gear (3) when the door member (2) closes the opening (11, 12) has a tooth tip more than the other portion. An air passage opening and closing device characterized in that the air passage is large.

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