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JP4296952B2 - Shaft backlash prevention device - Google Patents
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JP4296952B2 - Shaft backlash prevention device - Google Patents

Shaft backlash prevention device Download PDF

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JP4296952B2
JP4296952B2 JP2004034044A JP2004034044A JP4296952B2 JP 4296952 B2 JP4296952 B2 JP 4296952B2 JP 2004034044 A JP2004034044 A JP 2004034044A JP 2004034044 A JP2004034044 A JP 2004034044A JP 4296952 B2 JP4296952 B2 JP 4296952B2
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Prior art keywords
shaft
liner
prevention device
wedge portion
guide hole
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JP2005226689A (en
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雅行 二口
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Nok Corp
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Nok Corp
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Description

本発明は、例えば自動車内燃機関の吸気系に使用されているバタフライバルブ装置のように、互いに遊嵌する軸受とシャフトの間に生じるガタつきを抑止するためのシャフトのガタつき防止装置に関するものである。   BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaft chattering prevention device for preventing rattling between a bearing and a shaft that are loosely fitted to each other, such as a butterfly valve device used in an intake system of an automobile internal combustion engine. is there.

自動車用内燃機関の吸気系に使用されているバタフライバルブ装置においては、図3に示すように、バタフライバルブを取り付けられたバタフライ4を軸線方向で2つ有するシャフト3が、ボディ1に設けられた軸受2に遊嵌されて、図示しないアクチュエータの作動等により揺動してバタフライバルブの開度を調節する構成となっている。   In the butterfly valve device used in the intake system of an internal combustion engine for automobiles, as shown in FIG. 3, a shaft 3 having two butterflies 4 to which butterfly valves are attached in the axial direction is provided in the body 1. It is loosely fitted to the bearing 2 and swings by the operation of an actuator (not shown) to adjust the opening of the butterfly valve.

このバタフライバルブ装置においては、シャフト3が軸受2に遊嵌されているために、例えばアイドリング時において、バタフライバルブの両面に作用する圧力の差が正及び負の値を交互にとるような場合等には、シャフト3が軸受2内でガタついてバタバタ音と称せられる異音(タタキ音)を発することがある。   In this butterfly valve device, since the shaft 3 is loosely fitted to the bearing 2, for example, when idling, the difference in pressure acting on both surfaces of the butterfly valve alternately takes positive and negative values, etc. In some cases, the shaft 3 rattles in the bearing 2 and emits an abnormal sound (a rattling sound) referred to as a fluttering sound.

この異音(タタキ音)を防止するため、図4に示すような特許文献1や図5に示すような特許文献2のシャフトのガタつき防止装置が用いられている。
実開昭61−140266号公報 実開昭61−116229号公報
In order to prevent this abnormal noise (scratch noise), the shaft rattle prevention device of Patent Document 1 as shown in FIG. 4 and Patent Document 2 as shown in FIG. 5 is used.
Japanese Utility Model Publication No. 61-140266 Japanese Utility Model Publication No. 61-116229

図4に示す装置では、シャフト3の中心に対し軸線上に向かってライナー5が配され、ライナー5とそれを付勢するスプリング6でシャフト3を軸受2内へ押さえる構成となっている。   In the apparatus shown in FIG. 4, a liner 5 is arranged toward the axis with respect to the center of the shaft 3, and the shaft 3 is pressed into the bearing 2 by the liner 5 and a spring 6 that urges the liner 5.

しかし、図4の装置においては、脈動力の印加される方向が先端のライナー5の押さえ付ける力方向からズレている場合、消音効果は十分発揮できないことが確認されている。このため、ライナー押し付け力と脈動力が同方向となるように、ライナー5を配する必要があるが、その方向への設置スペースが無い場合については、十分な効果が得られないまま使用しなければならない。   However, in the apparatus of FIG. 4, it has been confirmed that the silencing effect cannot be sufficiently exhibited when the direction in which the pulsating power is applied deviates from the direction of the pressing force of the liner 5 at the tip. For this reason, it is necessary to arrange the liner 5 so that the liner pressing force and the pulsating force are in the same direction. However, when there is no installation space in that direction, the liner 5 must be used without obtaining a sufficient effect. I must.

図5に示す装置では、シャフト3の軸線から外れたシャフト3の周面の略接線方向に向かってライナー5が配され、ライナー5とそれを付勢するスプリング6でシャフト3を押さえる構成となっている。   In the apparatus shown in FIG. 5, the liner 5 is arranged in a substantially tangential direction of the peripheral surface of the shaft 3 deviated from the axis of the shaft 3, and the shaft 3 is pressed by the liner 5 and a spring 6 that urges the liner 5. ing.

しかし、図5の装置においては、ライナー5先端が球形をしていることから、シャフト3との接点の力に対しては効果があるが、シャフト3とは点接触となることから摩耗発生が懸念され、耐久性に欠けてしまう。   However, in the apparatus of FIG. 5, the tip of the liner 5 is spherical, so that it is effective for the contact force with the shaft 3, but wear occurs due to point contact with the shaft 3. Concerned and lacks durability.

本発明は上記課題を解決するためになされたもので、その目的とするところは、異音の発生を抑制すると共に摩耗耐久性を向上したシャフトのガタつき防止装置を提供することにある。   The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a shaft rattle prevention device that suppresses generation of abnormal noise and improves wear durability.

上記目的を達成するために本発明にあっては、
バタフライバルブを有するとともにボディの一部に形成された軸受に遊嵌されるシャフトのガタつきを防止するシャフトのガタつき防止装置であって、
前記シャフトの軸線から外れた前記シャフトの周面の略接線方向に向けて延びるようにボディに設けられた案内孔内に配置され、
該案内孔内を移動可能なライナー部材と、該ライナー部材を付勢する付勢手段と、を備える、シャフトのガタつき防止装置において、
前記ライナー部材は、前記シャフトと前記案内孔の内壁との間に入り込み前記シャフトを前記軸受に対して押し付ける楔部と該楔部が前記シャフトに巻き込まれることを防止すべく前記楔部のシャフト側の斜面の根本から突出して自身が前記シャフトに当接する突部とを有し、
前記付勢手段は、前記ライナー部材を前記シャフトの周面の略接線方向に付勢する
ことを特徴とする。
In order to achieve the above object, the present invention provides:
A shaft backlash prevention device that has a butterfly valve and prevents looseness of a shaft loosely fitted to a bearing formed in a part of the body,
Arranged in a guide hole provided in the body so as to extend in a substantially tangential direction of the peripheral surface of the shaft deviated from the axis of the shaft,
In a shaft rattle prevention device, comprising: a liner member movable in the guide hole; and an urging means for urging the liner member.
The liner member includes a wedge portion which is pressed against the shaft enters between the inner wall of the guide hole and the shaft relative to the bearing, the wedge portion of the shaft in order to prevent the wedge portion is caught in the shaft and projections themselves projecting from the ground on the side of the slope is brought into contact with the shaft, the possess,
It said biasing means biases the liner member in a substantially tangential direction of the circumferential surface of the shaft,
It is characterized by that.

本発明によると、ライナー部材で確実にシャフトを軸受に押し付けて異音の発生を抑制することができると共に、ライナー部材の楔部が点接触しないことから摩耗耐久性を向上することができる。   According to the present invention, it is possible to reliably press the shaft against the bearing with the liner member to suppress the generation of abnormal noise, and it is possible to improve the wear durability because the wedge portion of the liner member does not make point contact.

図1、図2を参照して、実施の形態について説明する。図1は実施の形態に係るシャフトのガタつき防止装置を示す断面図である。図2は実施の形態に係るシャフトのガタつき防止装置のライナーを示す図である。   The embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a cross-sectional view illustrating a shaft rattle prevention device according to an embodiment. FIG. 2 is a view showing a liner of the shaft rattle prevention device according to the embodiment.

図1のシャフト3のガタつき防止装置は、従来同様、図3のバタフライバルブ装置に用いられる。このシャフト3のガタつき防止装置は、移動可能なライナー5(ライナー部材)と、ライナー5を付勢するスプリング6(付勢手段)と、を備え、ボディ1に形成された案内孔8内に配置される。   1 is used in the butterfly valve device of FIG. 3 as in the prior art. The rattling prevention device for the shaft 3 includes a movable liner 5 (liner member) and a spring 6 (biasing means) that biases the liner 5, and is provided in a guide hole 8 formed in the body 1. Be placed.

ボディ1に設けられた案内孔8は、シャフト3の軸線から外れたシャフト3の周面の略接線方向に向けて延びるように形成されている。   The guide hole 8 provided in the body 1 is formed so as to extend in a substantially tangential direction of the peripheral surface of the shaft 3 deviated from the axis of the shaft 3.

ガタつき防止装置がガタつきを防止するシャフト3は、ボディ1の一部に形成された軸受2に遊嵌される。シャフト3には、バタフライ4が図1の断面位置と異なる軸線方向位置に形成されている。   The shaft 3 that prevents the rattling prevention device from rattling is loosely fitted to a bearing 2 formed in a part of the body 1. A butterfly 4 is formed on the shaft 3 at an axial position different from the cross-sectional position of FIG.

ライナー5は、図2に詳細を示すように、シャフト3と案内孔8の内壁との間に入り込みシャフト3を軸受2に対して押し付ける楔部5aと、楔部5aがシャフト3に巻き込まれることを防止するために楔部5aのシャフト3側の斜面の根本から突出して自身がシャフト3に当接する突部5bと、を有する。   As shown in detail in FIG. 2, the liner 5 enters between the shaft 3 and the inner wall of the guide hole 8, and the wedge portion 5 a that presses the shaft 3 against the bearing 2, and the wedge portion 5 a is wound around the shaft 3. In order to prevent this, the projection 5b protrudes from the base of the slope of the wedge portion 5a on the shaft 3 side and contacts the shaft 3 itself.

スプリング6は、コイルスプリングであり、ボディ1に固定された受け部材7が移動不可であることから、移動可能なライナー5をシャフト3に押し付ける方向へ付勢する。   Since the spring 6 is a coil spring and the receiving member 7 fixed to the body 1 cannot move, the spring 6 biases the movable liner 5 in the direction of pressing against the shaft 3.

そして、ライナー5は、案内孔8内で、スプリング6によってシャフト3の周面の略接線方向に向けて付勢され、楔部5aがシャフト3と案内孔8の内壁との間に差し込まれ、シャフト3を軸受2の内面に圧接する。   The liner 5 is urged toward the substantially tangential direction of the peripheral surface of the shaft 3 by the spring 6 in the guide hole 8, and the wedge portion 5 a is inserted between the shaft 3 and the inner wall of the guide hole 8, The shaft 3 is pressed against the inner surface of the bearing 2.

以上の構成では、シャフト3のガタつき防止装置を設置するスペースがあまり無い場合であっても、ライナー5の先端に楔部5aを有することにより、楔部5aの形状とライナー5の中心位置を変更することで、シャフト3とライナー5の接触位置を変更でき、脈動圧の印加方向に対し有効な方向からのシャフト3の軸受2への押し付けができる。   In the above configuration, even when there is not much space for installing the rattling prevention device for the shaft 3, the wedge portion 5a is provided at the tip of the liner 5 so that the shape of the wedge portion 5a and the center position of the liner 5 can be determined. By changing, the contact position of the shaft 3 and the liner 5 can be changed, and the shaft 3 can be pressed against the bearing 2 from an effective direction with respect to the direction in which the pulsation pressure is applied.

また、ライナー5先端が楔部5aであることで、シャフト3との接触が点接触では無くなり、摩耗耐久性が向上する。   Further, since the tip of the liner 5 is the wedge portion 5a, the contact with the shaft 3 is not a point contact, and the wear durability is improved.

さらに、ライナー5の楔部5aがシャフト3回転時に巻き込まれることは、ライナー5に楔部5aの根本に突部5bを形成することによって、巻き込まれる前に突部5bがシャフト3に接触して巻き込みを防止し、ライナー5の巻き込みによるバルブ作動性不良を防止することができる。   Further, the wedge portion 5a of the liner 5 is wound when the shaft 3 rotates. By forming the protrusion 5b at the root of the wedge portion 5a on the liner 5, the protrusion 5b contacts the shaft 3 before being wound. Involvement can be prevented, and poor valve operability due to entrainment of the liner 5 can be prevented.

実施の形態に係るシャフトのガタつき防止装置を示す断面図である。It is sectional drawing which shows the rattling prevention apparatus of the shaft which concerns on embodiment. 実施の形態に係るシャフトのガタつき防止装置のライナーを示す図である。It is a figure which shows the liner of the rattling prevention apparatus of the shaft which concerns on embodiment. シャフトのガタつき防止装置が用いられるバタフライバルブ装置を示す断面図である。It is sectional drawing which shows the butterfly valve apparatus in which the rattling prevention apparatus of a shaft is used. 従来技術のシャフトのガタつき防止装置を示す断面図である。It is sectional drawing which shows the rattling prevention apparatus of the prior art shaft. 従来技術のシャフトのガタつき防止装置を示す断面図である。It is sectional drawing which shows the rattling prevention apparatus of the prior art shaft.

符号の説明Explanation of symbols

1 ボディ
2 軸受
3 シャフト
4 バタフライ
5 ライナー
5a 楔部
5b 突部
6 スプリング
7 受け部材
8 案内孔
1 Body 2 Bearing 3 Shaft 4 Butterfly 5 Liner 5a Wedge 5b Projection 6 Spring 7 Receiving Member 8 Guide Hole

Claims (1)

バタフライバルブを有するとともにボディの一部に形成された軸受に遊嵌されるシャフトのガタつきを防止するシャフトのガタつき防止装置であって、
前記シャフトの軸線から外れた前記シャフトの周面の略接線方向に向けて延びるようにボディに設けられた案内孔内に配置され、
該案内孔内を移動可能なライナー部材と、該ライナー部材を付勢する付勢手段と、を備える、シャフトのガタつき防止装置において、
前記ライナー部材は、前記シャフトと前記案内孔の内壁との間に入り込み前記シャフトを前記軸受に対して押し付ける楔部と該楔部が前記シャフトに巻き込まれることを防止すべく前記楔部のシャフト側の斜面の根本から突出して自身が前記シャフトに当接する突部とを有し、
前記付勢手段は、前記ライナー部材を前記シャフトの周面の略接線方向に付勢する
ことを特徴とするシャフトのガタつき防止装置。
A shaft backlash prevention device that has a butterfly valve and prevents looseness of a shaft loosely fitted to a bearing formed in a part of the body,
Arranged in a guide hole provided in the body so as to extend in a substantially tangential direction of the peripheral surface of the shaft deviated from the axis of the shaft,
In a shaft rattle prevention device, comprising: a liner member movable in the guide hole; and an urging means for urging the liner member.
The liner member includes a wedge portion which is pressed against the shaft enters between the inner wall of the guide hole and the shaft relative to the bearing, the wedge portion of the shaft in order to prevent the wedge portion is caught in the shaft and projections themselves projecting from the ground on the side of the slope is brought into contact with the shaft, the possess,
It said biasing means biases the liner member in a substantially tangential direction of the circumferential surface of the shaft,
A shaft shaki prevention device characterized by that.
JP2004034044A 2004-02-10 2004-02-10 Shaft backlash prevention device Expired - Lifetime JP4296952B2 (en)

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JP4296952B2 true JP4296952B2 (en) 2009-07-15

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Publication number Priority date Publication date Assignee Title
JP5969833B2 (en) * 2012-06-21 2016-08-17 株式会社マーレ フィルターシステムズ Intake device for internal combustion engine

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