JP2004026069A - Air conditioning unit for vehicle - Google Patents

Air conditioning unit for vehicle Download PDF

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Publication number
JP2004026069A
JP2004026069A JP2002187528A JP2002187528A JP2004026069A JP 2004026069 A JP2004026069 A JP 2004026069A JP 2002187528 A JP2002187528 A JP 2002187528A JP 2002187528 A JP2002187528 A JP 2002187528A JP 2004026069 A JP2004026069 A JP 2004026069A
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Japan
Prior art keywords
bearing portion
conditioning unit
damper
peripheral surface
inner peripheral
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2002187528A
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Japanese (ja)
Inventor
Takehiro Yamamoto
山本　雄大
Kazumi Fujimoto
藤本　和己
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Japan Climate Systems Corp
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Japan Climate Systems Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Japan Climate Systems Corp filed Critical Japan Climate Systems Corp
Priority to JP2002187528A priority Critical patent/JP2004026069A/en
Publication of JP2004026069A publication Critical patent/JP2004026069A/en
Pending legal-status Critical Current

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  • Sliding-Contact Bearings (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioning unit for a vehicle with improved turning condition of a dumper with a simple configuration. <P>SOLUTION: A shaft portion 8 of a dumper 5 is supported turnably on a bearing portion 13 formed on a wall surface of a case 2. The bearing portion 13 has a cylindrical shape. The shaft portion 8 has a slide contact surface 14 that is in slide-contact with an inner circumferential surface of the bearing portion 13 and a flank relief 15 that is spaced away from the inner circumferential surface of the bearing portion 13. A die parting line PL is positioned on the flank relief 15 used for molding the dumper 5. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、ダンパの支持構造に特徴を有する車両用空調ユニットに関するものである。
【０００２】
【従来の技術】
従来、車両用空調ユニットでは、ダンパは、その軸部を、ユニットを構成するケースの内面に形成した筒状の軸受部に回転自在に支持されている。軸受部と軸部とは、軸受部の内周面と軸部の外周面との間に隙間が生じないように高精度に形成され、かつ、グリス等の潤滑油が塗布されることにより、がたつきや異音の発生が抑えられている。
【０００３】
【発明が解決しようとする課題】
しかしながら、前記従来の車両用空調ユニットでは、合成樹脂を成形加工することによりダンパを形成している。このため、軸部を高精度に形成するために、金型構造が複雑化し、コストアップを招来するという問題がある。すなわち、金型のパーティングライン（固定金型と可動金型の分離面）が軸部に位置すると、バリの発生により所望の精度（真円度）が得られない。このため、軸部のみをスライド金型によって形成しなければならなかった。
【０００４】
また、潤滑油は手作業により塗布されているため、塗布量のばらつきを避けることは困難であった。塗布量が適正量よりも多いと、他の不要な箇所に付着する一方、少ないと、早期に潤滑油切れが生じてダンパの回動状態が悪化し、摺接面の擦れにより異音が発生するという問題がある。
【０００５】
そこで、本発明は、簡単な構成であるにも拘わらず、ダンパの回動状態を良好なものとすることができる車両用空調ユニットを提供することを課題とする。
【０００６】
【課題を解決するための手段】
本発明は、前記課題を解決するための手段として、ケースの壁面に形成した軸受部に、ダンパの軸部を回転自在に支持してなる車両用空調ユニットにおいて、
前記軸受部を、円筒形状とする一方、
前記軸部を、前記軸受部の内周面に摺接する摺接面と、前記軸受部の内周面から離間する逃げ面とを備えた形状とし、逃げ面に、前記ダンパを成形加工する際の金型のパーティングラインを位置させたものである。
【０００７】
この構成により、軸部に成形加工時のバリが発生したとしても、その位置は逃げ面であり、直接軸受部の内周面に接触することがない。したがって、軸部の摺接面のみが軸受部の内周面に摺接し、ダンパの回動状態を良好なものとすることができる。
【０００８】
前記軸受部と前記軸部との間に形成される空間が所定量の潤滑油を貯留可能な一定体積となるように、前記逃げ面を形成すると、塗布する潤滑油の量を常に一定の適正量とすることができ、潤滑油が他の不要箇所に付着したり、早期に喪失してダンパの回動不良を起こしたりすることを防止可能な点で好ましい。
【０００９】
また、本発明は、前記課題を解決するための手段として、ケースの壁面に形成した軸受部に、前記ダンパの軸部を回転自在に支持してなる車両用空調ユニットにおいて、
前記軸受部を、円筒形状とする一方、
前記軸部を、前記軸受部の内周面を摺接する半円部と、前記軸受部の内周面に先端のみ摺接し、他の部分は離間する半楕円部とで構成し、半円部と半楕円部の境界部分にダンパを成形加工する際の金型のパーティングラインを位置させたものである。
【００１０】
この構成により、成形加工時のバリの発生を防止することができ、半円部と半楕円部の先端部分とを軸受部の内周面に摺接させることにより、ダンパの回動状態を良好なものとすることができる。
【００１１】
【発明の実施の形態】
以下、本発明に係る実施形態を添付図面に従って説明する。
【００１２】
図１は、本実施形態に係る車両用空調ユニット１を示す。この空調ユニット１では、ケース２内に設けたブロアファン３を回転させることにより、内気又は外気をエバポレータ４で冷却・除湿し、エアミックスダンパ５で分流し、その一方をヒータコア６で加熱し、他方をそのまま通過させ、両者を混合して所望温度とした後、車内に送風するようになっている。
【００１３】
エアミックスダンパ５は、図２に示すように、板状部７と軸部８とからなる合成樹脂製（ここでは、ポリプロピレンにタルク又はマイカを４０重量％含有させたものを使用）のもので、板状部７の表裏面にはポリウレタン製の緩衝板９が貼着されている。板状部７は、略Ｖ字形の壁面に形成した第１開口部１０と第２開口部１１に緩衝板９をそれぞれ圧接して開閉する。軸部８には、その長手方向に沿って両側に所定間隔で複数の凹部１２が形成されている。軸部８の両端は、板状部７から突出し、ケース２に形成した円筒状の軸受部１３に回転自在に支持されている。
【００１４】
軸部８は、図３に示すように、その横断面は略楕円状となっており、長軸側外周面は前記軸受部１３の内周面に摺接自在に支持される摺接面１４を構成し、短軸側外周面は前記軸受部１３の内周面から離間する逃げ面１５となっている。軸部８の逃げ面１５と軸受部１３の内周面との間の距離は、後述するように、たとえ成形時にバリが発生しても軸受部１３の内周面とは干渉することのない値とされている。また、軸部８の逃げ面１５と軸受部１３の内周面との間に形成される空間Ｓは、所望量の潤滑油を貯留するのに適した体積となっている。したがって、塗布する潤滑油が周囲の不要な箇所、例えば緩衝板９等に付着したり、あるいは、早期に潤滑油不足となって軸部８と軸受部１３との間に摩擦音等の異音の発生をもたらしたりするといった不具合の発生を防止することができる。
【００１５】
前記エアミックスダンパ５は、成形加工により形成する。成形用金型は、板状部７の片側に位置する固定側金型１６と、この固定側金型１６に対して接離する可動側金型１７とのみで構成され、軸部８を真円に形成するためにスライドコア等の金型開閉方向に対して直交する方向にスライドする別型を必要としない。すなわち、エアミックスダンパ５の中心線にパーティングラインＰＬが位置し、このパーティングラインＰＬ上にバリが発生する恐れがあるが、本実施形態では、軸部８に於けるパーティングラインＰＬの位置は、図３に示すように、短軸と一致している。このため、たとえ逃げ面１５にバリが発生したとしても、軸受部１３の内周面と干渉する恐れがなく、軸部８の摺接面１４と軸受部１３の内周面との間の摺接状態に悪影響を及ぼすことがない。したがって、金型を固定側金型１６と可動側金型１７のみからなる安価なものとすることが可能となる。
【００１６】
なお、前記実施形態では、軸部８の横断面を略楕円形状としたが、例えば、図４に示すように、半円部１８と半楕円部１９とを組み合わせた形状としてもよい。すなわち、半円部１８の外周面と半楕円部１９の先端面とを軸受部１３の内周面に摺接する摺接面１４とし、半楕円部１９の他の部分を逃げ面１５とする。そして、半円部１８と半楕円部１９との境目をパーティングラインＰＬと一致させる。これにより、半円部１８と半楕円部１９を成形する際の合わせ面を段違いにすることができ、半円部１８の角部に於けるバリの発生を抑え、軸受部１３の内周面との干渉を防止することができる。このように、軸部８を半円部１８と半楕円部１９とを組み合わせた形状とした形状とした場合であっても、金型を固定側金型１６と可動側金型１７のみで構成することができ、安価に製作することが可能となる。
【００１７】
【発明の効果】
以上の説明から明らかなように、本発明によれば、ダンパの軸部を摺接面と逃げ面とで構成し、逃げ面にパーティングラインが位置するようにダンパを成形加工するようにしたので、簡単かつ安価な構成であるにも拘わらず、ダンパの回動状態を良好なものとすることができる。
【図面の簡単な説明】
【図１】本実施形態に係る空調ユニットの一例を示す概略図である。
【図２】図２のエアミックスダンパの平面図である。
【図３】図２の軸部を示す拡大側面図である。
【図４】他の形状をした軸部の例を示す拡大側面図である。
【符号の説明】
１…ユニット
２…ケース
５…エアミックスダンパ
７…板状部
８…軸部
９…緩衝板
１３…軸受部
１４…摺接面
１５…逃げ面
１６…固定側金型
１７…可動側金型
１８…半円部
１９…半楕円部[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a vehicle air conditioning unit having a damper support structure.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a vehicle air conditioning unit, a damper has a shaft portion rotatably supported by a cylindrical bearing portion formed on an inner surface of a case constituting the unit. The bearing portion and the shaft portion are formed with high precision so that a gap does not occur between the inner peripheral surface of the bearing portion and the outer peripheral surface of the shaft portion, and by applying lubricating oil such as grease, The occurrence of rattling and abnormal noise is suppressed.
[0003]
[Problems to be solved by the invention]
However, in the conventional vehicle air conditioning unit, the damper is formed by molding a synthetic resin. For this reason, in order to form a shaft part with high precision, there is a problem that a mold structure is complicated and cost is increased. That is, when the parting line of the mold (separation surface between the fixed mold and the movable mold) is located on the shaft portion, the desired accuracy (roundness) cannot be obtained due to the generation of burrs. For this reason, only the shaft portion has to be formed by the slide mold.
[0004]
In addition, since the lubricating oil is manually applied, it is difficult to avoid a variation in the amount of application. If the applied amount is more than the appropriate amount, it will adhere to other unnecessary parts, while if it is less, the lubricating oil will run out early and the rotating state of the damper will deteriorate, and abnormal noise will occur due to friction of the sliding contact surface There is a problem of doing.
[0005]
Therefore, an object of the present invention is to provide a vehicle air-conditioning unit capable of improving the rotational state of a damper despite its simple configuration.
[0006]
[Means for Solving the Problems]
The present invention provides, as a means for solving the above-described problems, an air conditioning unit for a vehicle in which a shaft portion of a damper is rotatably supported on a bearing portion formed on a wall surface of a case.
While the bearing portion has a cylindrical shape,
When the shaft portion has a shape having a sliding contact surface that is in sliding contact with the inner peripheral surface of the bearing portion and a flank surface that is separated from the inner peripheral surface of the bearing portion, and when the damper is formed on the flank surface, The parting line of the mold is positioned.
[0007]
With this configuration, even when burrs are generated in the shaft during the forming process, the position is the flank and does not directly contact the inner peripheral surface of the bearing. Therefore, only the sliding contact surface of the shaft portion comes into sliding contact with the inner peripheral surface of the bearing portion, and the turning state of the damper can be improved.
[0008]
When the flank is formed so that a space formed between the bearing portion and the shaft portion has a constant volume capable of storing a predetermined amount of lubricating oil, the amount of lubricating oil to be applied is always constant. This is preferable in that it can prevent the lubricating oil from adhering to other unnecessary portions and preventing the lubricating oil from being lost early and causing poor rotation of the damper.
[0009]
According to another aspect of the present invention, there is provided a vehicle air-conditioning unit configured to rotatably support a shaft of the damper on a bearing formed on a wall surface of a case.
While the bearing portion has a cylindrical shape,
The shaft portion includes a semi-circular portion that slides on the inner peripheral surface of the bearing portion, and a semi-elliptical portion that slides only at the tip on the inner peripheral surface of the bearing portion and separates the other portion. And a parting line of a mold at the time of forming the damper at the boundary between the semi-elliptical portion and the semi-elliptical portion.
[0010]
With this configuration, it is possible to prevent the occurrence of burrs at the time of forming, and to make the semicircular portion and the tip portion of the semielliptical portion slidably contact the inner peripheral surface of the bearing portion, thereby improving the rotational state of the damper. It can be.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments according to the present invention will be described with reference to the accompanying drawings.
[0012]
FIG. 1 shows a vehicle air conditioning unit 1 according to the present embodiment. In the air conditioning unit 1, by rotating a blower fan 3 provided in a case 2, the inside air or the outside air is cooled and dehumidified by an evaporator 4, divided by an air mix damper 5, and one of them is heated by a heater core 6. The other is allowed to pass as it is, and after mixing the two to a desired temperature, the air is blown into the vehicle.
[0013]
As shown in FIG. 2, the air mix damper 5 is made of a synthetic resin including a plate-shaped portion 7 and a shaft portion 8 (here, polypropylene containing talc or mica at 40% by weight is used). On the front and back surfaces of the plate-shaped portion 7, polyurethane cushion plates 9 are adhered. The plate-shaped portion 7 opens and closes by pressing the buffer plate 9 against the first opening 10 and the second opening 11 formed on the substantially V-shaped wall. The shaft portion 8 is formed with a plurality of recesses 12 at predetermined intervals on both sides along the longitudinal direction. Both ends of the shaft portion 8 protrude from the plate-shaped portion 7 and are rotatably supported by a cylindrical bearing portion 13 formed in the case 2.
[0014]
As shown in FIG. 3, the shaft 8 has a substantially elliptical cross section, and the outer peripheral surface on the long axis side is slidably contacted with the inner peripheral surface of the bearing 13. The outer peripheral surface on the short axis side is a flank 15 that is separated from the inner peripheral surface of the bearing portion 13. The distance between the flank 15 of the shaft portion 8 and the inner peripheral surface of the bearing portion 13 does not interfere with the inner peripheral surface of the bearing portion 13 even if burrs occur during molding, as described later. Value. The space S formed between the flank 15 of the shaft 8 and the inner peripheral surface of the bearing 13 has a volume suitable for storing a desired amount of lubricating oil. Therefore, the lubricating oil to be applied adheres to unnecessary parts in the surroundings, for example, to the buffer plate 9 or the like, or the lubricating oil becomes insufficient at an early stage, causing abnormal noise such as frictional noise between the shaft portion 8 and the bearing portion 13. It is possible to prevent the occurrence of troubles such as causing the occurrence.
[0015]
The air mix damper 5 is formed by molding. The molding die is composed of only a fixed die 16 located on one side of the plate-shaped portion 7 and a movable die 17 which comes into contact with and separates from the fixed die 16. There is no need for a separate mold such as a slide core that slides in a direction perpendicular to the mold opening and closing direction in order to form a circle. That is, the parting line PL is located at the center line of the air mix damper 5, and burrs may be generated on the parting line PL. The position coincides with the short axis as shown in FIG. Therefore, even if burrs are generated on the flank 15, there is no risk of interference with the inner peripheral surface of the bearing portion 13, and the sliding between the sliding contact surface 14 of the shaft portion 8 and the inner peripheral surface of the bearing portion 13 does not occur. It does not adversely affect the contact state. Therefore, it is possible to reduce the cost of the mold including only the fixed mold 16 and the movable mold 17.
[0016]
In the above-described embodiment, the cross section of the shaft portion 8 has a substantially elliptical shape. However, for example, as shown in FIG. 4, a shape combining a semicircular portion 18 and a semielliptical portion 19 may be used. That is, the outer peripheral surface of the semicircular portion 18 and the tip end surface of the semielliptical portion 19 are defined as a sliding contact surface 14 that slides on the inner peripheral surface of the bearing portion 13, and the other portion of the semielliptical portion 19 is defined as a flank surface 15. Then, the boundary between the semicircular portion 18 and the semielliptical portion 19 is made to coincide with the parting line PL. Thereby, the mating surface when forming the semi-circular portion 18 and the semi-elliptical portion 19 can be made uneven, the occurrence of burrs at the corners of the semi-circular portion 18 can be suppressed, and the inner peripheral surface of the bearing portion 13 can be formed. Interference can be prevented. As described above, even when the shaft portion 8 has a shape obtained by combining the semicircular portion 18 and the semielliptical portion 19, the mold is constituted only by the fixed mold 16 and the movable mold 17. And can be manufactured at low cost.
[0017]
【The invention's effect】
As is clear from the above description, according to the present invention, the shaft portion of the damper is configured by the sliding surface and the flank, and the damper is formed so that the parting line is positioned on the flank. Therefore, the turning state of the damper can be improved in spite of the simple and inexpensive configuration.
[Brief description of the drawings]
FIG. 1 is a schematic diagram illustrating an example of an air conditioning unit according to the present embodiment.
FIG. 2 is a plan view of the air mix damper of FIG. 2;
FIG. 3 is an enlarged side view showing a shaft part of FIG. 2;
FIG. 4 is an enlarged side view showing an example of a shaft portion having another shape.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Unit 2 ... Case 5 ... Air mix damper 7 ... Plate part 8 ... Shaft part 9 ... Buffer plate 13 ... Bearing part 14 ... Sliding contact surface 15 ... Flank surface 16 ... Fixed side die 17 ... Movable side die 18 … Semicircle part 19… Semielliptical part

Claims (3)

ケースの壁面に形成した軸受部に、ダンパの軸部を回転自在に支持してなる車両用空調ユニットにおいて、
前記軸受部を、円筒形状とする一方、
前記軸部を、前記軸受部の内周面に摺接する摺接面と、前記軸受部の内周面から離間する逃げ面とを備えた形状とし、逃げ面に、前記ダンパを成形加工する際の金型のパーティングラインを位置させたことを特徴とする車両用空調ユニット。In a vehicle air-conditioning unit in which a shaft portion of a damper is rotatably supported on a bearing portion formed on a wall surface of a case,
While the bearing portion has a cylindrical shape,
When the shaft portion has a shape having a sliding contact surface that is in sliding contact with the inner peripheral surface of the bearing portion and a flank surface that is separated from the inner peripheral surface of the bearing portion, and when the damper is formed on the flank surface, An air conditioning unit for a vehicle, wherein a parting line of a mold is located. 前記軸受部と前記軸部との間に形成される空間が所定量の潤滑油を貯留可能な一定体積となるように、前記逃げ面を形成したことを特徴とする請求項１に記載の車両用空調ユニット。The vehicle according to claim 1, wherein the flank is formed such that a space formed between the bearing portion and the shaft portion has a constant volume capable of storing a predetermined amount of lubricating oil. Air conditioning unit. ケースの壁面に形成した軸受部に、ダンパの軸部を回転自在に支持してなる車両用空調ユニットにおいて、
前記軸受部を、円筒形状とする一方、
前記軸部を、前記軸受部の内周面を摺接する半円部と、前記軸受部の内周面に先端のみ摺接し、他の部分は離間する半楕円部とで構成し、半円部と半楕円部の境界部分に前記ダンパを成形加工する際の金型のパーティングラインを位置させたことを特徴とする車両用空調ユニット。In a vehicle air-conditioning unit in which a shaft portion of a damper is rotatably supported on a bearing portion formed on a wall surface of a case,
While the bearing portion has a cylindrical shape,
The shaft portion includes a semi-circular portion that slides on the inner peripheral surface of the bearing portion, and a semi-elliptical portion that slides only at the tip on the inner peripheral surface of the bearing portion and separates the other portion. An air conditioning unit for a vehicle, wherein a parting line of a mold for molding the damper is positioned at a boundary between the semi-elliptical part and the semi-elliptical part.
JP2002187528A 2002-06-27 2002-06-27 Air conditioning unit for vehicle Pending JP2004026069A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008100606A (en) * 2006-10-19 2008-05-01 Mitsubishi Heavy Ind Ltd Vehicular air-conditioner
JP2008195133A (en) * 2007-02-09 2008-08-28 Nippon Plast Co Ltd Wind direction adjusting device
WO2018088131A1 (en) * 2016-11-09 2018-05-17 パナソニックＩｐマネジメント株式会社 Rotary operation type electronic component
CN112771281A (en) * 2018-09-19 2021-05-07 Ntn株式会社 Bearing device
US11268736B2 (en) * 2017-02-08 2022-03-08 Valeo Systemes Thermiques Shut-off flap and corresponding heating, ventilation and/or air conditioning installation

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008100606A (en) * 2006-10-19 2008-05-01 Mitsubishi Heavy Ind Ltd Vehicular air-conditioner
JP2008195133A (en) * 2007-02-09 2008-08-28 Nippon Plast Co Ltd Wind direction adjusting device
WO2018088131A1 (en) * 2016-11-09 2018-05-17 パナソニックＩｐマネジメント株式会社 Rotary operation type electronic component
US11268736B2 (en) * 2017-02-08 2022-03-08 Valeo Systemes Thermiques Shut-off flap and corresponding heating, ventilation and/or air conditioning installation
CN112771281A (en) * 2018-09-19 2021-05-07 Ntn株式会社 Bearing device

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