JP6997553B2 - Knocking sensor unit - Google Patents

Knocking sensor unit Download PDF

Info

Publication number
JP6997553B2
JP6997553B2 JP2017147525A JP2017147525A JP6997553B2 JP 6997553 B2 JP6997553 B2 JP 6997553B2 JP 2017147525 A JP2017147525 A JP 2017147525A JP 2017147525 A JP2017147525 A JP 2017147525A JP 6997553 B2 JP6997553 B2 JP 6997553B2
Authority
JP
Japan
Prior art keywords
screw
screw member
knocking sensor
insertion hole
dropout prevention
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.)
Active
Application number
JP2017147525A
Other languages
Japanese (ja)
Other versions
JP2019027918A (en
Inventor
克樹 青井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NGK Spark Plug Co Ltd
Original Assignee
NGK Spark Plug Co Ltd
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 NGK Spark Plug Co Ltd filed Critical NGK Spark Plug Co Ltd
Priority to JP2017147525A priority Critical patent/JP6997553B2/en
Priority to CN201810639602.XA priority patent/CN109323795B/en
Priority to DE102018211562.1A priority patent/DE102018211562A1/en
Publication of JP2019027918A publication Critical patent/JP2019027918A/en
Application granted granted Critical
Publication of JP6997553B2 publication Critical patent/JP6997553B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
    • G01L23/22—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
    • G01L23/22—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines
    • G01L23/221—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines for detecting or indicating knocks in internal combustion engines
    • 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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
    • F16B19/02—Bolts or sleeves for positioning of machine parts, e.g. notched taper pins, fitting pins, sleeves, eccentric positioning rings
    • 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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B41/00—Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
    • F16B41/002—Measures against loss of bolts, nuts or pins
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
    • G01L23/26—Details or accessories
    • 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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B43/00—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts
    • F16B43/001—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts for sealing or insulation
    • 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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread

Description

本発明は、内燃機関で発生するノッキングを検出するための、ノッキングセンサユニットに関する。 The present invention relates to a knocking sensor unit for detecting knocking generated in an internal combustion engine.

従来、自動車等の内燃機関で発生するノッキングの検出センサとして、そのノッキングに伴う振動を、圧電素子を用いて検出するものが広く用いられている。このようなノッキングセンサの取付形態の一つとして、センサを貫通して形成されたねじ挿通孔にセンサとは別体のねじ部材を通し、そのセンサ底面から突出するねじ部先端を、取付部側のねじ孔にねじ込む方式がある。
ところで、別体のねじ部材を用いて取り付けるノッキングセンサの場合、ねじ部材を探すのに手間取ったり、紛失等すると取付の作業効率が低下する。又、ねじ挿通孔に合わないねじ部材を使用して取付不良等が生じる恐れがある。さらに、センサのねじ挿通孔は多くの場合、センサの両端面のどちらからでも挿通できるため、本来の挿通方向と逆向きに誤って取付けると、センサの所定の取付座面が正しく取付部に向かなくなるという不具合もある。 Conventionally, as a knocking detection sensor generated in an internal combustion engine of an automobile or the like, a sensor that detects vibration accompanying the knocking by using a piezoelectric element has been widely used. As one of the mounting forms of such a knocking sensor, a screw member separate from the sensor is passed through a screw insertion hole formed through the sensor, and the tip of the screw portion protruding from the bottom surface of the sensor is attached to the mounting portion side. There is a method of screwing into the screw hole of.
By the way, in the case of a knocking sensor that is mounted by using a separate screw member, if it takes time to find the screw member or if it is lost, the mounting work efficiency is lowered. In addition, if a screw member that does not fit the screw insertion hole is used, mounting defects may occur. In addition, the screw insertion holes in the sensor can often be inserted from either end of the sensor, so if the sensor is erroneously installed in the opposite direction of the original insertion direction, the sensor's predetermined mounting seat surface will be correctly oriented toward the mounting part. There is also a problem that it disappears.

そこで、ノッキングセンサのねじ挿通孔に対し予めねじ部材を挿通してこれらを１セットにパッケージ包装すると共に、ねじ部材の軸部表面からねじ部材脱落防止部材を突出して形成させ、ねじ挿通孔の内面との間の摩擦によりねじ部材の脱落を防止した技術が開発されている（特許文献１）。 Therefore, a screw member is inserted into the screw insertion hole of the knocking sensor in advance, and these are packaged as a set. At the same time, a screw member dropout prevention member is formed so as to protrude from the surface of the shaft portion of the screw member, and the inner surface of the screw insertion hole is formed. A technique for preventing the screw member from falling off due to friction between the screw member and the screw member has been developed (Patent Document 1).

特開平１１－２０１８１４号公報（図１）Japanese Unexamined Patent Publication No. 11-201814 (Fig. 1)

しかしながら、この技術においては、ねじ部材の外表面に樹脂等を一体成形して、ねじ部材脱落防止部材を形成するため、コストアップや、汎用のねじ部材を使用し難い点で改良の余地がある。
そこで、本発明は、ノッキングセンサに、ねじ部材を低コストでかつ脱落を防止して確実にセットしたノッキングセンサユニットの提供を目的とする。 However, in this technology, since a resin or the like is integrally molded on the outer surface of the screw member to form a screw member dropout prevention member, there is room for improvement in terms of cost increase and difficulty in using a general-purpose screw member. ..
Therefore, an object of the present invention is to provide a knocking sensor unit in which a screw member is securely set in a knocking sensor at low cost and by preventing the screw member from falling off.

上記課題を解決するため、本発明のノッキングセンサユニットは、センサ取付用のねじ部材と、前記ねじ部材が挿通されるねじ挿通孔が形成されたノッキングセンサと、前記ねじ挿通孔に挿通された前記ねじ部材が、前記ねじ挿通孔から脱落することを防止するねじ部材脱落防止部材と、を備えたノッキングセンサユニットにおいて、前記ねじ部材のねじ部が前記ねじ挿通孔に対向し、前記ねじ部材脱落防止部材は樹脂からなり、かつ前記ねじ部材の隣接するねじ山の頂点間の間隔より薄い厚みの環状をなして前記ねじ山を跨いで該ねじ山の間の谷部に係合すると共に、自身の外縁が径方向に突没する凹凸状をなして前記ねじ挿通孔に接触していることを特徴とする。


In order to solve the above problems, the knocking sensor unit of the present invention includes a screw member for mounting a sensor, a knocking sensor having a screw insertion hole through which the screw member is inserted, and the screw insertion hole inserted into the screw insertion hole. In a knocking sensor unit provided with a screw member dropout prevention member that prevents the screw member from falling out of the screw insertion hole, the screw portion of the screw member faces the screw insertion hole to prevent the screw member from falling off. The member is made of resin and forms an annular shape having a thickness thinner than the distance between the vertices of the adjacent threads of the thread member , straddles the threads , engages with the valley portion between the threads, and has its own. The outer edge is concave and convex in the radial direction and is in contact with the screw insertion hole.

このノッキングセンサユニットによれば、環状のねじ部材脱落防止部材にてねじ部材をねじ挿通孔の内部に係止するので、ねじ部材の外表面に脱落防止用の樹脂等を一体成形等する必要がなく、ノッキングセンサに、ねじ部材を低コストでかつ脱落を防止して確実にセットできる。又、ねじ部材を加工する必要がないので、汎用のねじ部材を使用できる。
又、ねじ部材脱落防止部材を、ねじ部材の隣接するねじ山の頂点間の間隔より薄い厚みの環状とすることで、安価に市販されている汎用の樹脂シート等からねじ部材脱落防止部材を容易に製造（打ち抜き等）することができ、コストダウンをさらに図ることができる。
さらに、ねじ部材脱落防止部材の外縁を凹凸状にすることで、薄いねじ部材脱落防止部材が凸部で適度に撓んでねじ挿通孔に接触するので、ねじ挿通孔との係止力が向上する。
なお、「ねじ部材脱落防止部材の外縁が径方向に突没する」とは、ねじ部材脱落防止部材を厚み方向から見たときに、外縁の輪郭が径方向に突没することをいう。以下の「ねじ部材脱落防止部材の内縁が径方向に突没する」も同様である。 According to this knocking sensor unit, since the screw member is locked inside the screw insertion hole by the annular screw member dropout prevention member, it is necessary to integrally mold a resin or the like for fallout prevention on the outer surface of the screw member. The screw member can be reliably set on the knocking sensor at low cost and by preventing it from falling off. Moreover, since it is not necessary to process the screw member, a general-purpose screw member can be used.
Further, by making the thread member fall-off prevention member an annular shape having a thickness thinner than the distance between the vertices of the adjacent screw threads of the screw member, it is easy to make the screw member fall-off prevention member from a general-purpose resin sheet or the like that is commercially available at low cost. It can be manufactured (punched, etc.), further reducing costs.
Further, by making the outer edge of the screw member dropout prevention member uneven, the thin screw member dropout prevention member flexes appropriately at the convex portion and comes into contact with the screw insertion hole, so that the locking force with the screw insertion hole is improved. ..
In addition, "the outer edge of the screw member dropout prevention member is recessed in the radial direction" means that the contour of the outer edge is recessed in the radial direction when the screw member dropout prevention member is viewed from the thickness direction. The same applies to the following "the inner edge of the screw member dropout prevention member is sunk in the radial direction".

本発明のノッキングセンサユニットにおいて、前記ねじ部材脱落防止部材の内縁が径方向に突没する凹凸状をなしていてもよい。
このノッキングセンサユニットによれば、ねじ部材脱落防止部材と、ねじ部材のねじ山との接触面積が低減し、ねじ部材脱落防止部材をねじ部材に挿入し易くなる。 In the knocking sensor unit of the present invention, the inner edge of the screw member dropout prevention member may have an uneven shape in which the inner edge is projected in the radial direction.
According to this knocking sensor unit, the contact area between the screw member dropout prevention member and the thread of the screw member is reduced, and the screw member dropout prevention member can be easily inserted into the screw member.

この発明によれば、ノッキングセンサに、ねじ部材を低コストでかつ脱落を防止して確実にセットしたノッキングセンサユニットが得られる。 According to the present invention, it is possible to obtain a knocking sensor unit in which a screw member is securely set in a knocking sensor at low cost and by preventing the screw member from falling off.

本発明の実施形態に係るノッキングセンサユニットの外観を示す正面図である。It is a front view which shows the appearance of the knocking sensor unit which concerns on embodiment of this invention. 本発明の実施形態に係るノッキングセンサの断面図である。It is sectional drawing of the knocking sensor which concerns on embodiment of this invention. ねじ部材脱落防止部材がねじ挿通孔に接触した状態を示す断面図である。It is sectional drawing which shows the state which the screw member dropout prevention member is in contact with a screw insertion hole. ねじ部材脱落防止部材がねじ部材に係合した状態を示す図である。It is a figure which shows the state which the screw member dropout prevention member is engaged with a screw member.

以下、図１～図３を参照し、本発明の実施形態に係るノッキングセンサについて説明する。
図１はノッキングセンサの外観を示し、図２はノッキングセンサを軸方向に破断した断面図を示し、図３はねじ部材脱落防止部材がねじ挿通孔に接触した状態を示す断面図を示し、図４はねじ部材脱落防止部材がねじ部材に係合した状態を示している。
図１において、ノッキングセンサ１は、内燃機関のシリンダブロック等へ取付けるためのねじ挿通孔１１(図２参照)を中心部に有する、いわゆるセンターホール式非共振型のノッキングセンサである。ノッキングセンサ１は、樹脂モールド材料である合成樹脂（例えばナイロン６６）製のケース３により覆われている。このケース３は、上部がテーパ状に成形された円柱形状の素子収納部５と、図示しない点火時期制御装置からのコネクタを接続するコネクタ部７とから構成されている。
図２に示すように、ノッキングセンサ１は、金属材料（例えばＳＰＨＤ、ＳＷＣＨ２５Ｋ）からなる主体金具９を備えており、主体金具９は、ねじ部材（六角ボルト）３０を挿通するためのねじ挿通孔１１を有する円筒形状の筒状部１３と、筒状部１３の一端側（図１の下側）にて外周面から周方向外側に張り出す鍔部１５とを有している。
この主体金具９の鍔部１５の厚み方向の一面（図１の上面）側には、筒状部１３の外周に嵌められる環状（円筒形状）で、圧電セラミックス（例えばＰＺＴ）からなる圧電素子１７が載置されている。
また、圧電素子１７の上面側には、筒状部１３の外周に嵌められる環状（円筒形状）で、錘としての効果を発揮する比重を有する金属材料（例えばＳＭＦ４０５０）からなるウェイト１９が載置されている。 Hereinafter, the knocking sensor according to the embodiment of the present invention will be described with reference to FIGS. 1 to 3.
FIG. 1 shows the appearance of the knocking sensor, FIG. 2 shows a cross-sectional view of the knocking sensor broken in the axial direction, and FIG. 3 shows a cross-sectional view showing a state in which the screw member dropout prevention member is in contact with the screw insertion hole. Reference numeral 4 indicates a state in which the screw member dropout prevention member is engaged with the screw member.
In FIG. 1, the knocking sensor 1 is a so-called center hole type non-resonant knocking sensor having a screw insertion hole 11 (see FIG. 2) for attaching to a cylinder block or the like of an internal combustion engine in the center. The knocking sensor 1 is covered with a case 3 made of a synthetic resin (for example, nylon 66) which is a resin mold material. The case 3 is composed of a cylindrical element accommodating portion 5 having a tapered upper portion and a connector portion 7 for connecting a connector from an ignition timing control device (not shown).
As shown in FIG. 2, the knocking sensor 1 includes a main metal fitting 9 made of a metal material (for example, SPHD, SWCH25K), and the main metal fitting 9 has a screw insertion hole for inserting a screw member (hexagon bolt) 30. It has a cylindrical portion 13 having a cylindrical shape 11 and a flange portion 15 protruding outward in the circumferential direction from the outer peripheral surface on one end side (lower side of FIG. 1) of the tubular portion 13.
On one side (upper surface in FIG. 1) of the flange portion 15 of the main metal fitting 9 in the thickness direction, a piezoelectric element 17 made of piezoelectric ceramics (for example, PZT) having an annular shape (cylindrical shape) fitted to the outer periphery of the tubular portion 13. Is placed.
Further, on the upper surface side of the piezoelectric element 17, a weight 19 made of a metal material (for example, SMF4050), which is an annular shape (cylindrical shape) fitted to the outer periphery of the tubular portion 13 and has a specific gravity that exerts an effect as a weight, is placed. Has been done.

鍔部１５と圧電素子１７との間、及びウェイト１９と圧電素子１７との間、即ち圧電素子１７の厚み方向の両側には、導電材料（例えば黄銅）からなる出力端子２１、２３が、それぞれ圧電素子１７と接するように配置されている。なお、出力端子２１、２３のうち圧電素子１７と接する部分は環状である。
また、鍔部１５と出力端子２１との間、及び出力端子２３とウェイト１９との間には、絶縁性を有するフィルム状の合成樹脂（例えばＰＥＴ）からなる環状の絶縁体２５、２７がそれぞれ配置され、出力端子２１、２３が主体金具９の鍔部１５やウェイト１９と短絡しないようにされている。
なお、圧電素子１７とウェイト１９と出力端子２１、２３（環状部分）と絶縁体２５、２７との内周面と、筒状部１３の外周面との間には、環状の空間２０が形成されており、この環状の空間２０にも上記合成樹脂が充填されている。更に、主体金具９には、金属材料（例えばＳＫ－５Ｍ）からなり、ウェイト１９を鍔部１５方向（同図下方）へ押圧する環状の板バネ２９が取り付けられている。 Output terminals 21 and 23 made of a conductive material (for example, brass) are provided between the flange portion 15 and the piezoelectric element 17, and between the weight 19 and the piezoelectric element 17, that is, on both sides of the piezoelectric element 17 in the thickness direction, respectively. It is arranged so as to be in contact with the piezoelectric element 17. The portion of the output terminals 21 and 23 in contact with the piezoelectric element 17 is annular.
Further, between the flange portion 15 and the output terminal 21, and between the output terminal 23 and the weight 19, annular insulators 25 and 27 made of a film-like synthetic resin (for example, PET) having an insulating property are respectively. It is arranged so that the output terminals 21 and 23 are not short-circuited with the flange portion 15 and the weight 19 of the main metal fitting 9.
An annular space 20 is formed between the inner peripheral surface of the piezoelectric element 17, the weight 19, the output terminals 21, 23 (annular portion), the insulators 25, 27, and the outer peripheral surface of the tubular portion 13. The annular space 20 is also filled with the synthetic resin. Further, the main metal fitting 9 is attached with an annular leaf spring 29 made of a metal material (for example, SK-5M) and pressing the weight 19 in the flange portion 15 direction (lower part of the figure).

さらに、板バネ２９の上側の位置において、筒状部１３の外周面には、筒状部１３の内面１３ａから周方向外側に向かって塑性変形して突出する突出部１３ｐが設けられている。そして、突出部１３ｐが板バネ２９の上面に接することによって、板バネ２９が下方に押圧され、さらに板バネ２９の弾性力によりウェイト１９が係止され、ウェイト１９と鍔部１５との間の積層構造体（圧電素子１７、出力端子２１、２３、絶縁体２５、２７）が主体金具９に固定される。 Further, at the position above the leaf spring 29, the outer peripheral surface of the tubular portion 13 is provided with a protruding portion 13p that plastically deforms and protrudes from the inner surface 13a of the tubular portion 13 toward the outside in the circumferential direction. Then, when the protruding portion 13p comes into contact with the upper surface of the leaf spring 29, the leaf spring 29 is pressed downward, and the weight 19 is further locked by the elastic force of the leaf spring 29, and the weight 19 is between the weight 19 and the flange portion 15. The laminated structure (piezoelectric element 17, output terminals 21, 23, insulators 25, 27) is fixed to the main metal fitting 9.

一方、ねじ部材３０は、六角形のねじ頭３０ａと、雄ネジが設けられたねじ部３０ｂとを一体に有し、ねじ頭３０ａはねじ挿通孔１１の内径よりも径大になっている。そして、ノッキングセンサ１の板バネ２９側からねじ部材３０をねじ挿通孔１１に挿通することで、ねじ頭３０ａがノッキングセンサ１の一端面１ｅ（図２の上面）に係止しつつ、ねじ部３０ｂがねじ挿通孔１１に挿通されてノッキングセンサ１の反対側の端面（図２の下面）をなす取付座面１ｆから突出している。つまり、端面１ｅから端面１ｆに向かう方向Ｆが「取付挿通方向」となる。
さらに、円環シート状のＰＥＴ樹脂からなる、ねじ部材脱落防止部材４０がねじ部３０ｂとねじ挿通孔１１の間に配置され、取付挿通方向Ｆと逆向きにねじ部材３０が移動して脱落するのを防止している。 On the other hand, the screw member 30 integrally has a hexagonal screw head 30a and a screw portion 30b provided with a male screw, and the screw head 30a has a diameter larger than the inner diameter of the screw insertion hole 11. Then, by inserting the screw member 30 into the screw insertion hole 11 from the leaf spring 29 side of the knocking sensor 1, the screw head 30a is locked to the one end surface 1e (upper surface of FIG. 2) of the knocking sensor 1 while the screw portion. 30b is inserted into the screw insertion hole 11 and protrudes from the mounting seat surface 1f forming the opposite end surface (lower surface of FIG. 2) of the knocking sensor 1. That is, the direction F from the end surface 1e to the end surface 1f is the "mounting insertion direction".
Further, a screw member dropout prevention member 40 made of an annular sheet-shaped PET resin is arranged between the screw portion 30b and the screw insertion hole 11, and the screw member 30 moves and falls off in the direction opposite to the mounting insertion direction F. Is prevented.

図３に示すように、ねじ部材脱落防止部材４０は、自身の外縁４０ｅの輪郭が径方向に突没する凹凸状をなしてねじ挿通孔１１の内面に接触している。又、本例では、ねじ部材脱落防止部材４０の内縁４０ｉの輪郭も径方向に突没する凹凸状をなしている。
そして、図３、図４に示すように、ねじ部材脱落防止部材４０は、ねじ部材３０の隣接するねじ山３０ｓ１、３０ｓ２の頂点間の間隔（ピッチ）より薄い厚みｔの円環状をなし、ねじ山３０ｓ１、３０ｓ２に係合している。
厚みｔは限定されないが、例えば０．１～０．７ｍｍとすることができる。又、ねじ部材脱落防止部材４０は環状であればよく、円環の他、例えば円環の一部を切り欠いたＣ環状等でもよい。 As shown in FIG. 3, the screw member dropout prevention member 40 is in contact with the inner surface of the screw insertion hole 11 in a concave-convex shape in which the contour of its outer edge 40e is recessed in the radial direction. Further, in this example, the contour of the inner edge 40i of the screw member dropout prevention member 40 also has an uneven shape that is recessed in the radial direction.
Then, as shown in FIGS. 3 and 4, the screw member dropout prevention member 40 forms an annular shape having a thickness t thinner than the distance (pitch) between the vertices of the adjacent threads 30s1 and 30s2 of the screw member 30 and is screwed. It is engaged with the mountains 30s1 and 30s2.
The thickness t is not limited, but can be, for example, 0.1 to 0.7 mm. Further, the screw member dropout prevention member 40 may be an annular shape, and may be an annular ring, for example, a C annular shape in which a part of the annular ring is cut off.

以上のように、環状のねじ部材脱落防止部材４０にてねじ部材３０をねじ挿通孔１１の内部に係止するので、ねじ部材３０の外表面に脱落防止用の樹脂等を一体成形等する必要がなく、ノッキングセンサ１に、ねじ部材３０を低コストでかつ脱落を防止して確実にセットできる。又、ねじ部材３０を加工する必要がないので、汎用のねじ部材を使用できる。
又、ねじ部材脱落防止部材４０を、ねじ部材の隣接するねじ山の頂点間の間隔より薄い厚みの環状とすることで、安価に市販されている汎用の樹脂シート等からねじ部材脱落防止部材４０を容易に製造（打ち抜き等）することができ、コストダウンをさらに図ることができる。
さらに、ねじ部材脱落防止部材４０の外縁４０ｅの輪郭を凹凸状にすることで、薄いねじ部材脱落防止部材４０が凸部で適度に撓んでねじ挿通孔１１に接触するので、ねじ挿通孔１１との係止力が向上する。 As described above, since the screw member 30 is locked inside the screw insertion hole 11 by the annular screw member dropout prevention member 40, it is necessary to integrally mold a resin or the like for dropout prevention on the outer surface of the screw member 30. The screw member 30 can be reliably set in the knocking sensor 1 at low cost and by preventing it from falling off. Further, since it is not necessary to process the screw member 30, a general-purpose screw member can be used.
Further, by forming the screw member fall-off prevention member 40 into an annular shape having a thickness thinner than the distance between the vertices of the adjacent screw threads of the screw member, the screw member fall-off prevention member 40 can be obtained from a general-purpose resin sheet or the like that is commercially available at low cost. Can be easily manufactured (punched, etc.), and cost can be further reduced.
Further, by making the contour of the outer edge 40e of the screw member dropout prevention member 40 uneven, the thin screw member dropout prevention member 40 is appropriately bent at the convex portion and comes into contact with the screw insertion hole 11. Locking force is improved.

なお、図４に示すように、ねじ部材脱落防止部材４０の内縁４０ｉの輪郭も凹凸状とすると、ねじ部材脱落防止部材４０と、ねじ部材３０のねじ山３０ｓ１、３０ｓ２との接触面積が低減し、ねじ部材脱落防止部材４０をねじ部材３０に挿入し易くなる。
又、ねじ部材脱落防止部材４０のヤング率が１．２～４．２ＭＰａであると、ねじ部材脱落防止部材４０が適度に撓むので、ねじ部材脱落防止部材４０をねじ部材３０に挿入し易くなると共に、ねじ部材脱落防止部材４０とねじ挿通孔１１との間の係止力がさらに向上する。 As shown in FIG. 4, when the contour of the inner edge 40i of the screw member dropout prevention member 40 is also uneven, the contact area between the screw member dropout prevention member 40 and the threads 30s1 and 30s2 of the screw member 30 is reduced. , The screw member dropout prevention member 40 can be easily inserted into the screw member 30.
Further, when the Young's modulus of the screw member dropout prevention member 40 is 1.2 to 4.2 MPa, the screw member dropout prevention member 40 is appropriately bent, so that the screw member dropout prevention member 40 can be easily inserted into the screw member 30. At the same time, the locking force between the screw member dropout prevention member 40 and the screw insertion hole 11 is further improved.

本発明は上記実施形態に限定されず、本発明の思想と範囲に含まれる様々な変形及び均等物に及ぶことはいうまでもない。
ねじ部材脱落防止部材４０としては、ＰＥＴの他、ＰＡ（ポリアミド）樹脂を用いることができる。ねじ部材脱落防止部材４０の形状も上記に限定されない。
ノッキングセンサ１の構成も上記に限定されない。 It goes without saying that the present invention is not limited to the above embodiments and extends to various modifications and equivalents included in the idea and scope of the present invention.
As the screw member dropout prevention member 40, PA (polyamide) resin can be used in addition to PET. The shape of the screw member dropout prevention member 40 is not limited to the above.
The configuration of the knocking sensor 1 is not limited to the above.

１ ノッキングセンサ
１１ ねじ挿通孔
３０ ねじ部材
３０ｓ１，３０ｓ２ 隣接するねじ山の頂点
４０ ねじ部材脱落防止部材
４０ｅ ねじ部材脱落防止部材の外縁
４０ｉ ねじ部材脱落防止部材の内縁
１００ ノッキングセンサユニット
ｔ ねじ部材脱落防止部材の厚み 1 Knocking sensor 11 Thread insertion hole 30 Thread member 30s1, 30s2 Top of adjacent thread 40 Thread member dropout prevention member 40e Thread member dropout prevention member outer edge 40i Thread member dropout prevention member inner edge 100 Knocking sensor unit t Thread member dropout prevention Thickness of member

Claims (2)

センサ取付用のねじ部材と、
前記ねじ部材が挿通されるねじ挿通孔が形成されたノッキングセンサと、
前記ねじ挿通孔に挿通された前記ねじ部材が、前記ねじ挿通孔から脱落することを防止するねじ部材脱落防止部材と、
を備えたノッキングセンサユニットにおいて、
前記ねじ部材のねじ部が前記ねじ挿通孔に対向し、
前記ねじ部材脱落防止部材は樹脂からなり、かつ前記ねじ部材の隣接するねじ山の頂点間の間隔より薄い厚みの環状をなして前記ねじ山を跨いで該ねじ山の間の谷部に係合すると共に、自身の外縁が径方向に突没する凹凸状をなして前記ねじ挿通孔に接触していることを特徴とするノッキングセンサユニット。 Screw members for mounting sensors and
A knocking sensor having a screw insertion hole through which the screw member is inserted, and a knocking sensor.
A screw member dropout prevention member that prevents the screw member inserted into the screw insertion hole from falling out of the screw insertion hole, and a screw member dropout prevention member.
In the knocking sensor unit equipped with
The threaded portion of the screw member faces the screw insertion hole,
The thread member fall-off prevention member is made of resin and forms an annular shape having a thickness thinner than the distance between the apexes of adjacent threads of the screw member , straddles the thread, and engages with a valley portion between the threads. A knocking sensor unit characterized in that its outer edge is concave and convex in the radial direction and is in contact with the screw insertion hole. 前記ねじ部材脱落防止部材の内縁が径方向に突没する凹凸状をなしている請求項１記載のノッキングセンサユニット。 The knocking sensor unit according to claim 1, wherein the inner edge of the screw member dropout prevention member has an uneven shape in which the inner edge is recessed in the radial direction.
JP2017147525A 2017-07-31 2017-07-31 Knocking sensor unit Active JP6997553B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2017147525A JP6997553B2 (en) 2017-07-31 2017-07-31 Knocking sensor unit
CN201810639602.XA CN109323795B (en) 2017-07-31 2018-06-20 Knock sensor unit
DE102018211562.1A DE102018211562A1 (en) 2017-07-31 2018-07-12 Knock sensor unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2017147525A JP6997553B2 (en) 2017-07-31 2017-07-31 Knocking sensor unit

Publications (2)

Publication Number Publication Date
JP2019027918A JP2019027918A (en) 2019-02-21
JP6997553B2 true JP6997553B2 (en) 2022-01-17

Family

ID=65004009

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2017147525A Active JP6997553B2 (en) 2017-07-31 2017-07-31 Knocking sensor unit

Country Status (3)

Country Link
JP (1) JP6997553B2 (en)
CN (1) CN109323795B (en)
DE (1) DE102018211562A1 (en)

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52132972U (en) * 1976-04-06 1977-10-08
JPS6040816U (en) * 1983-08-30 1985-03-22 富士ゼロックス株式会社 Clip to prevent mounting screws from falling
JPH0326063U (en) * 1989-07-24 1991-03-18
JPH0579825U (en) * 1992-03-30 1993-10-29 河村電器産業株式会社 Terminal structure of electrical equipment
CZ194096A3 (en) * 1995-07-03 1998-09-16 Robert Bosch Gmbh Vibration pick-up with pressure casing
JP3295021B2 (en) * 1997-07-22 2002-06-24 株式会社杉浦製作所 Locking female screw structure and its manufacturing method
JP3556821B2 (en) * 1998-01-15 2004-08-25 日本特殊陶業株式会社 Knocking detection sensor unit
JPWO2006022103A1 (en) * 2004-08-23 2008-05-08 シーケーディ株式会社 Bolt falling prevention structure and retaining ring
JP4121092B2 (en) * 2005-11-22 2008-07-16 三菱電機株式会社 Knock sensor
CN201053429Y (en) * 2007-05-28 2008-04-30 宋旭超 Thrust-stopping fastening screw bolt structure and thrust washer
CN101451572A (en) * 2007-11-30 2009-06-10 徐尚仁 Special looseness-proof spacer for looseness-proof screw
JP2010139010A (en) * 2008-12-12 2010-06-24 Burest Kogyo Kenkyusho Co Ltd Spacer for attaching bolt
JP5876448B2 (en) * 2012-09-20 2016-03-02 日本特殊陶業株式会社 Knocking sensor
CN103256290A (en) * 2013-04-24 2013-08-21 西安中航汉胜航空电力有限公司 Bolt anti-falling gasket
CN203335598U (en) * 2013-07-03 2013-12-11 许松林 Looseness-proof cylindrical threaded part
JP6177625B2 (en) * 2013-08-16 2017-08-09 株式会社シマノ Spinning reel
CN204961543U (en) * 2015-07-21 2016-01-13 昱擎科技股份有限公司 Reinforce locking theftproof spiro union gasket of type
CN105003519B (en) * 2015-08-04 2017-09-19 申书达 A kind of dismountable check bolt or screw assembly

Also Published As

Publication number Publication date
CN109323795A (en) 2019-02-12
JP2019027918A (en) 2019-02-21
CN109323795B (en) 2022-01-11
DE102018211562A1 (en) 2019-01-31

Similar Documents

Publication Publication Date Title
JP4121092B2 (en) Knock sensor
US5440933A (en) Pressure sleeve
JP5876448B2 (en) Knocking sensor
JP6019049B2 (en) Tire valve unit
JP3827087B2 (en) Mounting structure of knock sensor for internal combustion engine
JP6997553B2 (en) Knocking sensor unit
US9709454B2 (en) Non-resonant knock sensor
US6923041B2 (en) Non-resonance type knock sensor
KR20070049616A (en) Structure for fixing pem nut of flatness
KR102463148B1 (en) Wrench width adapter for parts screwed into threaded openings
US9648721B2 (en) Apparatus for mounting a printed circuit board
CN106741501B (en) Middle axle mounting structure of bicycle or electric bicycle
JP5412493B2 (en) Removal prevention cover and fuel pressure sensor unit provided with the same
JP5872888B2 (en) Screw locking structure
JP6508962B2 (en) Fastening structure of bolt to resin plate
JP7027251B2 (en) Knocking sensor
JP2006118582A (en) Female screw part
JP6491773B1 (en) Fastening structure
JP7114884B2 (en) Ignition coil for internal combustion engine
JP6830048B2 (en) Knocking sensor
JPH08156013A (en) Metal insert for insert molding
JP3207149U (en) Exterior fixing mechanism for analyzer
JP2017223485A (en) Knock sensor
JP2015031316A (en) Resin molding fitting structure
JP2016053594A (en) Knocking sensor

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20200121

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20200918

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20201102

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20201222

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20210419

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20210602

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20210913

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20211124

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20211217

R150 Certificate of patent or registration of utility model

Ref document number: 6997553

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350