WO1995016144A1 - Structure support - Google Patents

Structure support Download PDF

Info

Publication number
WO1995016144A1
WO1995016144A1 PCT/JP1994/002082 JP9402082W WO9516144A1 WO 1995016144 A1 WO1995016144 A1 WO 1995016144A1 JP 9402082 W JP9402082 W JP 9402082W WO 9516144 A1 WO9516144 A1 WO 9516144A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotating shaft
bearing
cylindrical member
fitting hole
bearing structure
Prior art date
Application number
PCT/JP1994/002082
Other languages
English (en)
Japanese (ja)
Inventor
Akira Takahashi
Toru Hashimoto
Mitsuhiro Miyake
Kiyoshi Shinjo
Shigeo Tsukakoshi
Hisakazu Miya
Naoto Nishimoto
Original Assignee
Mitsubishi Jidosha Kogyo Kabushiki Kaisha
Mikuni Corporation
Tokyo Roki Corporation
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 Mitsubishi Jidosha Kogyo Kabushiki Kaisha, Mikuni Corporation, Tokyo Roki Corporation filed Critical Mitsubishi Jidosha Kogyo Kabushiki Kaisha
Publication of WO1995016144A1 publication Critical patent/WO1995016144A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C25/00—Bearings for exclusively rotary movement adjustable for wear or play
    • F16C25/02—Sliding-contact bearings
    • F16C25/04—Sliding-contact bearings self-adjusting

Definitions

  • the present invention relates to a bearing structure for supporting a rotating shaft of a butterfly valve used for an intake device of an internal combustion engine mounted on, for example, an automobile, and more particularly, to a (radial) bearing structure for supporting the rotating shaft in a radial direction.
  • a bearing structure for supporting a rotating shaft of a butterfly valve used for an intake device of an internal combustion engine mounted on, for example, an automobile and more particularly, to a (radial) bearing structure for supporting the rotating shaft in a radial direction.
  • FIG. 1 For example, as a bearing structure for supporting a rotating shaft of a multiple butterfly valve used in an intake device of an internal combustion engine, there is one as shown in FIG.
  • the valve body 1 of the intake device is provided with a rotary shaft insertion hole 1b penetrating through the intake passages in a direction orthogonal to the six intake passages.
  • a rotating shaft 2a for firmly supporting the valve body 2 is inserted into the fitting hole 1b from one end of the valve body 1, whereby the rotating shaft 2a is rotatably supported.
  • the inner peripheral wall of the fitting hole 1b provided in the valve body 1 itself serves as a bearing
  • the inner peripheral wall of the fitting hole 1b has a lubricating metal dry bearing.
  • the rotating shaft 2a and the valve It is assumed that the bearings have different clear coefficients due to the difference in thermal expansion coefficient when they are made of different materials such as steel and aluminum, or that they are made of the same material. However, even if the bearing clearance fluctuates due to the difference in the amount of expansion and contraction due to the shape, it is not possible to compensate for such fluctuation in the clearance, and therefore, the rotating shaft 2a has the bearing hole. A rattling sound may be generated in the vehicle, or a sudden state may occur when the rotation resistance of the rotation shaft 2a increases due to the close contact state.
  • the intake device such as the valve body 1 or the rotating shaft 2a of the intake device, which was conventionally formed of a metal material such as aluminum or steel, the use of resin as a part of the study is considered. Have been.
  • the object of the present invention is to reduce the weight of the product and, particularly, to control the ambient temperature and the like. Regardless of the difference in the amount of expansion and contraction deformation of the bearing area due to the change, we will provide a bearing structure that can reliably achieve the original function of the bearing with high accuracy.
  • the present invention is a bearing structure for rotatably supporting a rotating shaft disposed in a shell in a radial direction thereof, wherein the shell has an axis in the same direction as the axis of the rotating shaft.
  • a frustum-shaped fitting hole wherein the rotating shaft has a fitting hole inside for rotatably fitting the fitting hole, and has a truncated cone-shaped outer shape; It is characterized in that it is supported by a fitted cylindrical member.
  • the rotating shaft is rotatably supported on the shell via the cylindrical member, and the cylindrical member having the outer shape of a truncated cone is formed on the shell. It is formed and fitted into a fitting hole which also has the shape of a truncated cone.
  • the cylindrical member moves along the inner surface of the fitting hole, that is, in the axial direction so as to absorb the increase in volume, and The optimal happiness can be maintained without reducing the clarity in the area. That is, by utilizing the wedge action of the cylindrical member having the tapered shape, a predetermined bearing function can be obtained regardless of changes in the ambient temperature. In addition, by providing a restricting member for restricting the movement of the cylindrical member in the horizontal direction, even if the cylindrical member moves due to thermal expansion or the like, the cylindrical member is restricted to a predetermined range, thereby preventing the cylindrical member from falling off.
  • FIG. 1 is a cross-sectional view showing a bearing structure of a multiple butterfly valve in a conventional intake device
  • FIG. 2 is an external plan view of an intake device employing a bearing structure according to the present invention
  • FIG. 3 is an external side view of the intake device at the arrow R in FIG. 2
  • FIG. 4 is an external side view of the intake device at the arrow L in FIG. 2
  • FIG. FIG. 6 is a cross-sectional view of the intake device taken along a line BB in FIG. 2
  • FIG. 6 is a partial cross-sectional view showing a bearing structure according to the present invention
  • FIG. It is a minute enlarged sectional view.
  • FIG. 2 shows a plan view of the external appearance of the air intake device, and as shown in the drawing, is made of a combination of resin die-cast products forming three regions I, 11 and 1II. That is, a branch portion (I) connected to the head intake port of the engine, a valve body (11) as a shell housing a multiple butterfly valve serving as an intake switching valve, a surge tank, The cover part (1 1 1) that forms the bypass intake passage is made by injection molding, etc. After that, each is integrally joined by vibration welding or the like on the joining flange surface.
  • FIG. 3 is a side view of the external appearance of the intake device shown in FIG. 2 as viewed in the direction of arrow R. As shown, a flange portion for mounting a throttle body for adjusting the output of the engine is shown. Along with 10, there is disposed an end bearing 20 that rotatably supports one end of a rotating shaft of the multiple butterfly valve.
  • FIG. 4 shows an external side view of the intake device shown in FIG. 2 as viewed in the direction of arrow L.
  • the outer surface has one end supported by an end bearing 20.
  • An actuator 30 having a gear mechanism built therein is attached to the other end of the rotary shaft of the continuous butterfly valve.
  • FIG. 5 is a cross-sectional view taken along a line BB in FIG. 2, and a multiple butterfly valve for opening and closing the intake passage 10 is arranged in this region.
  • a multiple butterfly valve arranged in a valve body ( ⁇ ) as a shell has a valve body 21 and a rotating shaft 21a for supporting the same. It is integrally formed of a material.
  • One end of the rotating shaft 2 la is rotatably supported by the end bearing 20, and the rotating shaft located between the valve bodies 21 is rotatably supported by the intermediate bearing 22. ing.
  • the other end of the rotating shaft 21a is connected to an actuator for driving the multiple butterfly valve.
  • This actiyue 30 When the worm gear 32 is rotated by a drive source (not shown), the worm wheel 31 that rotates with the worm gear 31 rotates, and the rotating shaft 2 1a that is integrally fixed to the worm wheel 31. Is to rotate.
  • the inner surface of the worm wheel 31 is urged outward by a spring 33, and a flange portion 21b formed integrally with the rotating shaft 21a has a valve body 21b. It is in contact with the inner wall of ( ⁇ ) and acts as a thrilling good luck.
  • the connection structure between the rotating shaft 21a and the worm wheel 31 will be described.
  • the worm wheel 31 protrudes from the gear portion and has a fitting hole therein.
  • a cylindrical member 31a having 31b is provided, while a fitting shaft 21c is provided at an end of the rotating shaft 21a. Then, the worm wheel 31 is assembled so that the fitting shaft 21c can be fitted and fitted into the fitting hole 31b, so that the two can be firmly and firmly fixed. ing.
  • Such a bearing portion is a feature of the present invention, and its structure will be described in detail below.
  • a cylindrical member 23 having a fitting hole 23 a for fitting is fitted. That is, the rotating shaft (columnar member) is supported by the valve body ( ⁇ ) via the cylindrical member 23.
  • the cylindrical member 23 is fitted into the fitting hole 25 having a truncated cone shape like the outer wall thereof, a wedge action is generated on the fitting surface. That is, due to an increase in the ambient temperature, etc., the fitting hole 25 of the cylindrical member 3 la (rotating shaft), the cylindrical member 23 and the valve body ( ⁇ ) undergoes expansion deformation. When the amount of expansion deformation of the cylindrical member 31a and the cylindrical member 23 is larger than the amount of expanded deformation, as shown in FIG. The cylindrical member 23 is moved in the direction of arrow S by the contact surface direction component H of the contacting force W.
  • the outer peripheral surface of the cylindrical member 31 a (rotating shaft) does not engage with the inner wall surface (bearing surface) of the fitting hole 23 a of the cylindrical member 23.
  • the desired euphoria can be obtained by maintaining the clarity.
  • the structure is such that the direct rotation is supported by a hole formed in the valve body as in the conventional example, or if a cylindrical member is not a truncated cone but a mere cylinder, No wedge effect occurs, especially when the amount of expansion due to rotation is large. If it is large, the clearance on the Yuuki receiving surface will be small, and it may be difficult to rotate by the rotation $.
  • the cylindrical member 23 having a truncated cone shape as described above, it is possible to ensure a predetermined bearing function regardless of the difference in the amount of expansion and contraction deformation of each component. it can.
  • a restricting member 24 for restricting the movement of the cylindrical member 23 to a predetermined range is disposed so as to abut on one end surface 23 c of the cylindrical member 23.
  • the tubular member 23 can be prevented from falling out of the fitting hole 25.
  • regulating members 24 are provided independently of each other, a configuration in which the inner end surface of the worm wheel 31 is used as the regulating portion may be employed. Further, the regulating member 24 is formed using an elastic material to prevent the cylindrical member 23 from rattling due to engine vibration. May be taken.
  • a frusto-conical fitting hole having an axis in the same direction as the axis of the rotating shaft is formed in the valve body as a shell. Fitted into the fitting hole The rotating shaft is rotatably supported by the fitting hole (bearing hole) provided in the external truncated cone-shaped cylindrical member to be fitted. Even if each member expands and deforms, the cylindrical member having the shape of a truncated cone moves in the axial direction by wedge action, so that a predetermined clearance can always be secured in the bearing region. However, a desired bearing function can be maintained.
  • the cylindrical member can be prevented from falling out of the fitting hole, and the desired bearing function can be maintained as described above.
  • the bearing structure according to the present invention can be used as a radial bearing that supports a rotating shaft that fixes a butterfly valve of an intake device for an internal combustion engine, and that supports other rotating shafts. It is useful for use as a radial bearing that is mounted on a rotating shaft, and is particularly suitable for mounting from the axial direction of the rotating shaft.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Support Of The Bearing (AREA)
  • Lift Valve (AREA)

Abstract

La présente invention concerne une structure de support destinée à maintenir radialement rotative une tige de soupape rotative placée dans un corps de soupape servant de logement. Ce logement comporte un passage de montage tronconique (25) dont l'axe est dans la même direction que l'axe rotatif (21a), la tige rotative étant maintenue par un élément tubulaire (23) pourvu d'un jour d'insertion (23a) dans lequel la tige rotative (21a, 31a) est introduite pour y être mise en place de façon à tourner librement. La tige rotative de forme externe tronconique, est introduite pour y être mise en place dans le passage de montage (25). Grâce à cette structure de maintien, il est possible de garantir toute fonction de maintien quelle que soit la déformation résultant de l'expansion et/ou de la contraction des éléments constitutifs du dispositif de maintien provoquée par les changements de température ambiante.
PCT/JP1994/002082 1993-12-10 1994-12-12 Structure support WO1995016144A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP5/310921 1993-12-10
JP31092193A JPH07167141A (ja) 1993-12-10 1993-12-10 軸受構造

Publications (1)

Publication Number Publication Date
WO1995016144A1 true WO1995016144A1 (fr) 1995-06-15

Family

ID=18010995

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1994/002082 WO1995016144A1 (fr) 1993-12-10 1994-12-12 Structure support

Country Status (2)

Country Link
JP (1) JPH07167141A (fr)
WO (1) WO1995016144A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6291900B1 (en) 1997-09-15 2001-09-18 General Electric Company Electrical energy management for manually powered devices
EP2468242A1 (fr) 2010-12-27 2012-06-27 KPSS-Kao Professional Salon Services GmbH Composition de blanchiment comportant du sel de magnésium

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5559811U (fr) * 1978-10-19 1980-04-23
JPS61241521A (ja) * 1985-04-19 1986-10-27 Ube Ind Ltd セラミツク軸受
JPS61241522A (ja) * 1985-04-19 1986-10-27 Ube Ind Ltd セラミツク軸受
JPH03503305A (ja) * 1988-10-13 1991-07-25 カーエスベー・アクチエンゲゼルシャフト キャンドモータポンプの軸のための軸受

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5559811U (fr) * 1978-10-19 1980-04-23
JPS61241521A (ja) * 1985-04-19 1986-10-27 Ube Ind Ltd セラミツク軸受
JPS61241522A (ja) * 1985-04-19 1986-10-27 Ube Ind Ltd セラミツク軸受
JPH03503305A (ja) * 1988-10-13 1991-07-25 カーエスベー・アクチエンゲゼルシャフト キャンドモータポンプの軸のための軸受

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6291900B1 (en) 1997-09-15 2001-09-18 General Electric Company Electrical energy management for manually powered devices
EP2468242A1 (fr) 2010-12-27 2012-06-27 KPSS-Kao Professional Salon Services GmbH Composition de blanchiment comportant du sel de magnésium

Also Published As

Publication number Publication date
JPH07167141A (ja) 1995-07-04

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