JP2006220241A - Rotation transmission device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotation transmission device which does not damage components and which can be attached to a hub of a wheel again even when the rotation transmission is provided to the hub of the wheel in an inappropriate state. <P>SOLUTION: The rotation transmission device A is provided with a housing 1, an object to be detected 5, and a magnetic detection element 3. The housing 1 is provided with an insertion part 1a for inserting an axle shaft S to which a front wheel 10 is attached, and the object to be detected 5 is provided with a cylindrical body 5a and a transmission piece part 5c. The cylindrical body 5a is arranged on the outer periphery of the insertion part 1a with flexible rotation, and the transmission piece part 5c transfers the rotation of the front wheel 10 to the body 5a. Then the magnetic detection element 3 senses a change in a magnetic pole caused by the rotation of the body 5a, and a plurality of magnetic poles are provided to the outer peripheral surface of the body 5a. Then the transmission piece part 5c is constituted by a material which can be deformed when the front wheel 10 is attached to an attachment part in an inappropriate state, and a deformation starting-point position P is provided to a more upward position than that of the base of a rotation transmission part 5b at the time of the inappropriate state. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、回転伝達装置に関し、例えばオートバイまたは自転車等の２輪車用の回転伝達装置に関するものである。   The present invention relates to a rotation transmission device, for example, a rotation transmission device for a two-wheeled vehicle such as a motorcycle or a bicycle.

回転伝達装置としての回転検出装置は、特許文献１に開示されるものがあり、この回転検出装置は、被検出体を検出するための検出面を有する略円筒形状の樹脂ケースに、回路基板に実装したホールＩＣ等からなる磁気検出素子と、マグネットとが、前記検出面に沿うように配設され、前記回路基板及び前記磁気検出素子，前記マグネットをエポキシ等からなる封止部材により封止する構造が採用されている。この回転検出装置を、２輪車用（例えば、オートバイ）の回転検出装置として用いる場合は、回転検出装置を車両のミッションケースやスプロケットカバー等に取り付け、その内部で回転するミッションギアやスプロケット等を被検出体として検出することが一般的である。   A rotation detection device as a rotation transmission device is disclosed in Patent Document 1. This rotation detection device is mounted on a circuit board on a substantially cylindrical resin case having a detection surface for detecting a detection target. A magnetic detection element made of a mounted Hall IC or the like and a magnet are disposed along the detection surface, and the circuit board, the magnetic detection element, and the magnet are sealed with a sealing member made of epoxy or the like. Structure is adopted. When this rotation detection device is used as a rotation detection device for a two-wheeled vehicle (for example, a motorcycle), the rotation detection device is attached to a vehicle mission case, a sprocket cover, etc. It is common to detect as an object to be detected.

このような回転検出装置を用いて、ミッションギアやスプロケット等を被検出体として検出する場合、前記被検出体には多少のクリアランスが存在するため、車両（２輪車）のボディ剛性や排気量等から前記被検出体に振動が生じ、前記被検出体と前記回転検出装置との検出位置ギャップが変動してしまうことから、前記回転検出装置に磁気の変化が生じ検出ノイズとなり、この回転検出装置から出力される出力データに応じて、例えばスピード表示する指示計器の誤動作の原因につながると言った問題点を有していた。この問題点に着目し、本願出願人は、特許文献２に開示されてる回転検出装置を提案している。   When such a rotation detection device is used to detect a transmission gear, sprocket, or the like as a detected object, the detected object has some clearance, so the body rigidity and displacement of the vehicle (two-wheeled vehicle) The detection object is vibrated from the above, and the detection position gap between the detection object and the rotation detection device fluctuates. Therefore, a magnetic change occurs in the rotation detection device, resulting in detection noise. Depending on the output data output from the apparatus, for example, there is a problem that it may cause a malfunction of the indicating instrument that displays the speed. Focusing on this problem, the applicant of the present application has proposed a rotation detection device disclosed in Patent Document 2.

この回転検出装置は、オートバイ等の２輪車における前輪ホイール（車輪）に装着されるものであり、前記前輪ホイールが装着される車軸が挿通する挿通部を備えたハウジングを備え、前記挿通部に前記前輪ホイールとともに回転する複数の磁極を有し、プラスチックマグネット等の磁性媒体から構成される被検出体を装着し、前記被検出体の回転による前記磁極の変化をホールＩＣ等からなる磁気検出手段によって検出する構造である。   This rotation detection device is attached to a front wheel (wheel) of a two-wheeled vehicle such as a motorcycle, and includes a housing having an insertion portion through which an axle to which the front wheel wheel is attached is inserted. A magnetic detection means comprising a plurality of magnetic poles rotating together with the front wheel, mounted on a detection object made of a magnetic medium such as a plastic magnet, and a change in the magnetic pole caused by rotation of the detection object made of a Hall IC or the like It is a structure to detect by.

前記被検出体は、前記磁極を有する円筒部と、前記前輪ホイールの回転を前記円筒部に伝達するための回転伝達片とがプラスチックマグネット等によって一体に形成されてなるものである。前記回転伝達片は、前記前輪ホイールのハブに設けられる凹部形状の取付部に対応するように、前記ハウジングの開口部側の前記円筒部から外方に引き出し形成されてなるもので、前記円筒部周縁の複数箇所に設けられるものである。   The object to be detected is formed by integrally forming a cylindrical portion having the magnetic pole and a rotation transmitting piece for transmitting rotation of the front wheel to the cylindrical portion by a plastic magnet or the like. The rotation transmission piece is formed to be drawn outward from the cylindrical portion on the opening side of the housing so as to correspond to a concave-shaped mounting portion provided on the hub of the front wheel. It is provided at a plurality of locations on the periphery.

かかる構成の回転検出装置は、前記前輪ホイールとフロントフォークとの間に狭持された状態で配設されるものである。即ち前記回転検出装置は、前記前輪ホイールが装着されている前記車軸を前記挿通部に挿通し、前記前輪ホイールの前記ハブに設けられる前記取付部に前記回転伝達片を嵌め込むとともに、前記挿通部から前記ハウジングの外方に向かって突出する前記車軸を前記フロントフォークを介してナット部材によって固定することで、前記前輪ホイールと前記フロントホイールとの間において狭持（共締め）される状態で配設される。
特開平２−２６４８１７号公報 特開平９−２２９７１４号公報 The rotation detection device having such a configuration is arranged in a state of being sandwiched between the front wheel and the front fork. That is, the rotation detection device inserts the axle on which the front wheel is mounted into the insertion portion, and inserts the rotation transmission piece into the attachment portion provided on the hub of the front wheel, and the insertion portion The axle projecting outward from the housing is fixed by a nut member via the front fork so that it is pinched (co-fastened) between the front wheel and the front wheel. Established.
JP-A-2-264817 JP-A-9-229714

かかる回転検出装置を前記ハブに取り付ける製造工程において、前記ハブの前記取付部に前記回転検出装置の前記回転伝達片を嵌め込む際に、前記回転伝達片が前記取付部に嵌ったか否かを目視によって確認することが困難である。従って前記回転伝達片が前記取付部に嵌め込まれない不適正な状態で前記回転検出装置が前記ハブと前記フロントフォークとの間において共締めされると、前記プラスチックマグネットにより構成される前記回転伝達片の破損が発生する恐れがあるといった問題点を有していた。   In the manufacturing process of attaching the rotation detection device to the hub, when the rotation transmission piece of the rotation detection device is fitted to the attachment portion of the hub, it is visually checked whether the rotation transmission piece is fitted to the attachment portion. It is difficult to confirm by. Therefore, when the rotation detecting device is fastened between the hub and the front fork in an inappropriate state where the rotation transmitting piece is not fitted into the mounting portion, the rotation transmitting piece configured by the plastic magnet is used. There was a problem that there was a risk of damage.

本発明は前記問題点に着目し、回転伝達装置が車輪のハブに不適正な状態で配設される場合であっても構成部品を破損させることなく、再び前記ハブに組み付け可能な回転伝達装置を提供するものである。   The present invention pays attention to the above-mentioned problems, and even if the rotation transmission device is disposed in an inappropriate state on the wheel hub, the rotation transmission device can be reassembled to the hub without damaging the components. Is to provide.

本発明は、請求項１に記載した回転伝達装置の通り、車輪が装着される車軸を挿通するための挿通部を備えたハウジングと、前記ハウジング内に配設され、前記挿通部の外周に対して回転自在に配設される筒状の胴部を備えるとともに、前記車輪の回転を前記胴部に伝達する回転伝達部を備える被回転体と、を備え、前記車輪のハブとフロントフォークとの間に挟持された状態で配設される回転伝達装置であって、前記回転伝達部は、前記ハブの取付部への取付状態が不適正な状態である場合に変形可能な材料にて形成される伝達片部を一体に備え、前記伝達片部は、前記回転伝達部の前記ハブ側となる根元より上方に変形起点位置を設けるべく肉抜き部が形成されてなるものである。   According to the rotation transmission device of the first aspect of the present invention, there is provided a housing having an insertion portion for inserting an axle on which a wheel is mounted, and a housing disposed in the housing, the outer periphery of the insertion portion. And a to-be-rotated body provided with a rotation transmission portion that transmits the rotation of the wheel to the trunk portion, and includes a hub and a front fork of the wheel. A rotation transmission device disposed in a sandwiched state, wherein the rotation transmission portion is formed of a deformable material when the mounting state of the hub to the mounting portion is in an inappropriate state. The transmission piece portion is formed with a lightening portion so as to provide a deformation starting point position above a base on the hub side of the rotation transmission portion.

また、請求項２に記載した回転伝達装置は、請求項１に記載の回転伝達装置において、前記ハウジングは、前記伝達片部が変形した場合に、前記伝達片部が前記ハウジングの内壁に当接しない空間部を有してなるものである。   The rotation transmission device according to claim 2 is the rotation transmission device according to claim 1, wherein when the transmission piece portion is deformed, the transmission piece abuts against an inner wall of the housing. It has a space part that does not.

また、請求項３に記載した回転伝達装置は、請求項１に記載した回転伝達装置において、前記被回転体は、前記胴部と前記回転伝達部とがインサート成形によって一体的に形成されてなるものである。   According to a third aspect of the present invention, in the rotation transmission device according to the first aspect, the body to be rotated and the rotation transmission portion are integrally formed by insert molding. Is.

また、請求項４に記載した回転伝達装置は、請求項１に記載した回転伝達装置において、前記胴部を磁性体材料から構成するとともに前記胴部の外周表面に複数の磁極を有するように構成し、前記胴部の回転を前記ハウジングに配設される磁気検出手段によって検出するように構成されてなるものである。   According to a fourth aspect of the present invention, there is provided the rotation transmission device according to the first aspect, wherein the body portion is made of a magnetic material and has a plurality of magnetic poles on the outer peripheral surface of the body portion. The rotation of the body portion is detected by magnetic detection means disposed in the housing.

本発明は、車輪が装着される車軸を挿通するための挿通部を備えたハウジングと、前記ハウジング内に配設され、前記挿通部の外周に対して回転自在に配設される筒状の胴部を備えるとともに、前記車輪の回転を胴部に伝達する回転伝達部を備える被回転体と、を備え、前記車輪とフロントフォークとの間に挟持された状態で配設される回転伝達装置に関し、回転伝達装置が車輪のハブに不適正な状態で配設される場合であっても構成部品を破損させることなく、再び前記ハブに組み付けることが可能となる。   The present invention includes a housing having an insertion portion for inserting an axle on which a wheel is mounted, and a cylindrical body that is disposed within the housing and is rotatably disposed with respect to the outer periphery of the insertion portion. And a rotated body provided with a rotation transmitting portion that transmits the rotation of the wheel to the trunk portion, and a rotation transmission device disposed in a state of being sandwiched between the wheel and a front fork. Even if the rotation transmission device is disposed in an inappropriate state on the wheel hub, it can be reassembled to the hub without damaging the components.

以下、本発明の実施の形態を添付図面に基づき説明するが、回転伝達装置として、例えば、オートバイの車輪の回転数を検出する電気式の回転検出装置を適用した場合について説明する。   DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. For example, a case where an electric rotation detection device that detects the rotation speed of a motorcycle wheel is applied as a rotation transmission device will be described.

図１から図３において、回転検出装置Ａは、ハウジング１と、回路基板２と、磁気検出素子（磁気検出手段）３と、シール部材４と、被検出体（被回転体）５とから構成されている。   1 to 3, the rotation detection device A includes a housing 1, a circuit board 2, a magnetic detection element (magnetic detection means) 3, a seal member 4, and a detection target (rotation target) 5. Has been.

ハウジング１は、ポリブチレンテレフタレートやポリアミド等の樹脂材料からなり、このハウジング１の略中央には、２輪車の前輪ホイール（車輪）が装着される車軸Ｓが挿通し、金属材料からなる円筒状の挿通部１ａがインサート成形されている。この挿通部１ａの周縁には、後で詳述する被検出体５の胴部が挿通部１ａの外周に対し回転自在に配設するための第１の収納部１ｂが形成され、この第１の収納部１ｂから段差部を介して連なる位置には、後で詳述する被検出体５の伝達片部が回転可能となる第２の収納部１ｃが形成され、この第２の収納部１ｃから段差部を介して連なる位置には、後で詳述するシール部材４を配設する第３の収納部１ｄが形成されている。また、第１の収納部１ｂから一方の外方には、回路基板２と回路基板２に実装した磁気検出素子３とを収納する第４の収納部１ｅが形成されている。尚、第２の収納部１ｂの高さ（深さ）Ｈは、後で詳述する被回転体５の伝達片部の変位量を考慮して設定されている。   The housing 1 is made of a resin material such as polybutylene terephthalate or polyamide, and an axle S on which a front wheel (wheel) of a two-wheeled vehicle is mounted is inserted through a substantially central portion of the housing 1 to form a cylindrical shape made of a metal material. The insertion part 1a is insert-molded. Formed on the periphery of the insertion portion 1a is a first storage portion 1b for disposing a body portion of the detected body 5 described later in detail so as to be rotatable with respect to the outer periphery of the insertion portion 1a. A second storage portion 1c is formed at a position continuous from the storage portion 1b via the stepped portion so that a transmission piece portion of the detected object 5 to be described later can be rotated, and this second storage portion 1c. A third storage portion 1d in which a seal member 4 which will be described in detail later is disposed is formed at a position continuous from the first through the step portion. In addition, a fourth storage portion 1e that stores the circuit board 2 and the magnetic detection element 3 mounted on the circuit board 2 is formed on one outer side from the first storage portion 1b. The height (depth) H of the second storage portion 1b is set in consideration of the amount of displacement of the transmission piece portion of the rotated body 5 described in detail later.

回路基板２は、ガラスエポキシ等の絶縁材料からなる基板に所定の配線パターンが形成されており、磁気検出素子３及びコンデンサ等からなる図示しない電子部品等が半田等により電気的に固定されている。また、この回路基板２は、磁気検出素子３への電源供給及び磁気検出素子３からの出力信号を図示しない指示計器（例えば、スピードメータ）に伝達するための配線コード（図示しない）が備えられ、この配線コードは回路基板２の所定箇所に半田により電気的に接続されている。かかる回路基板２は、第４の収納部１ｅ内に配設した後、この第４の収納部１ｅ内にエポキシ樹脂等からなる封止部材６を充填することで配設固定される。   The circuit board 2 has a predetermined wiring pattern formed on a substrate made of an insulating material such as glass epoxy, and an electronic component (not shown) made of a magnetic detection element 3 and a capacitor is electrically fixed by solder or the like. . Further, the circuit board 2 is provided with a wiring cord (not shown) for supplying power to the magnetic detection element 3 and transmitting an output signal from the magnetic detection element 3 to an indicator (not shown) (for example, a speedometer). The wiring cord is electrically connected to a predetermined portion of the circuit board 2 by soldering. The circuit board 2 is disposed and fixed by filling the fourth housing portion 1e with a sealing member 6 made of epoxy resin or the like after being disposed in the fourth housing portion 1e.

磁気検出素子３は、リードスイッチやホールＩＣ，ＭＲ素子（半導体磁気抵抗素子）等からなるもので、被検出体５の磁極の変化を検出する。   The magnetic detection element 3 includes a reed switch, a Hall IC, an MR element (semiconductor magnetoresistive element), and the like, and detects a change in the magnetic pole of the detected object 5.

シール部材４は、ニトリルやシリコン系等のゴム製材料からなるもので、このシール部材４は薄型のドーナッツ形状からなるものである。シール部材４は、ハウジング１の第３の収納部１ｄの側壁に対して外形が若干大きめに形成されているため、第３の収納部１ｄに圧入によって配設固定される。従って、回転検出装置Ａを前輪ホイール１０のハブ１０ａ（取付部）に配設した際に、ハブ１０ａの突設部１０ｂとシール部材４の内面とが当接することで、ハウジング１内部への塵やゴミ、あるいは水分等の侵入を防止するものである。   The seal member 4 is made of a rubber material such as nitrile or silicon, and the seal member 4 has a thin donut shape. Since the outer shape of the seal member 4 is slightly larger than the side wall of the third storage portion 1d of the housing 1, the seal member 4 is disposed and fixed to the third storage portion 1d by press fitting. Accordingly, when the rotation detection device A is disposed on the hub 10a (attachment portion) of the front wheel 10, the protruding portion 10b of the hub 10a and the inner surface of the seal member 4 come into contact with each other, so that This prevents intrusion of dust, moisture, moisture and the like.

被検出体５は、ハウジング１の挿通部１ａを挿通させるための円筒状の胴部（検出部）５ａが磁性体材料（例えば、プラスチックマグネット）にて形成され、この胴部５ａの外周表面には、例えば８極の着磁（N→Ｓ→Ｎ→Ｓ→・・・）が施されている。また被検出体５には、ポリアセタール，ポリアミド等の樹脂系材料からなる変形可能な材料から構成される回転伝達部５ｂを備えており、この回転伝達部５ｂには、前輪ホイール１０のハブ１０ａに形成される突設部１０ｂに対応する複数の伝達片部５ｃが形成されている。また、各伝達片部５ｃは、回転伝達部５ｂの根元よりも上方に変形起点位置Ｐを設けるべく肉抜き部５ｄが形成されている。   The detected body 5 has a cylindrical body (detection section) 5a for inserting the insertion section 1a of the housing 1 formed of a magnetic material (for example, a plastic magnet), and is formed on the outer peripheral surface of the body 5a. Is magnetized with, for example, 8 poles (N → S → N → S →...). The detected object 5 includes a rotation transmission portion 5b made of a deformable material made of a resin material such as polyacetal or polyamide. The rotation transmission portion 5b is connected to the hub 10a of the front wheel 10. A plurality of transmission piece portions 5c corresponding to the protruding portion 10b to be formed are formed. Each transmission piece 5c is formed with a lightening portion 5d so as to provide a deformation starting point position P above the root of the rotation transmission portion 5b.

具体的に言うと、被検出体５は、前輪ホイール１０のハブ１０ａへの取り付けが不適正な状態の場合、即ちハブ１０ａの突設部１０ｂと伝達片部５ｂとが噛み合わない状態で、回転検出装置Ａを２輪車のフロントフォーク（図示しない）とハブ（前輪ホイール）１０ａとの間に共締めすると、突設部５ｂが伝達片部５ｃに干渉することになるが（図３参照）、伝達片部５ｃに、回転伝達部５ｂのハブ１０ａ側となる根元から上方に変形起点位置Ｐを設けるべく肉抜き部５ｄが形成されることによって、伝達片部５ｃの第２の収納部１ｃの底面方向に変位する変位量を抑制することが可能となる。   Specifically, the detected object 5 rotates in a state where the front wheel 10 is not properly attached to the hub 10a, that is, in a state where the projecting portion 10b of the hub 10a and the transmission piece portion 5b do not mesh with each other. When the detection device A is fastened between the front fork (not shown) of the two-wheeled vehicle and the hub (front wheel) 10a, the protruding portion 5b interferes with the transmission piece 5c (see FIG. 3). In addition, a hollow portion 5d is formed on the transmission piece 5c so as to provide a deformation starting position P from the root on the hub 10a side of the rotation transmission portion 5b, whereby the second storage portion 1c of the transmission piece 5c is formed. It is possible to suppress the amount of displacement that is displaced in the bottom direction.

かかる被検出体５は、ハブ１０ａの取付部の適正位置、即ち前記取付部に設けられる突設部１０ｂの側面に伝達片部５ｃの側面が当接可能となる位置に嵌め込まれることによって、前輪ホイール１０の回転に伴ってハウジング１の挿通部１ａの外周を回転することになる。また、被検出体５は、胴部５ａと回転伝達部５ｂとがインサート成形によって一体的に形成され、胴部５ａと回転伝達部５ｂとは凹凸嵌合によって結合されることで廻り止め構造を得ている。   The detected body 5 is fitted into a proper position of the mounting portion of the hub 10a, that is, a position where the side surface of the transmission piece portion 5c can come into contact with the side surface of the projecting portion 10b provided in the mounting portion. As the wheel 10 rotates, the outer periphery of the insertion portion 1a of the housing 1 is rotated. In addition, the body 5a and the rotation transmission part 5b are integrally formed by insert molding, and the body 5a and the rotation transmission part 5b are coupled to each other by a concave-convex fitting to form a detent structure. It has gained.

以上の各部により回転検出装置Ａが構成される。かかる回転検出装置Ａは、図３に示すように、被検出体５における伝達片部５ｃに、回転伝達部５ｂの根元よりも上方に変形起点位置Ｐを設けるべく肉抜き部５ｄが形成される点に特徴を有するものである。従って、不適正な状態にて回転検出装置Ａがハブ１０ａの取付部に配設された際に、伝達片部５ｃが突設部１０ｂにより押されても、被回転体５の回転伝達部５ｂの根元から変形する場合に比べ、その変位量は少なくなるため、破損の発生を抑制することができる。   The rotation detecting device A is configured by the above-described units. In the rotation detection device A, as shown in FIG. 3, a hollow portion 5d is formed in the transmission piece portion 5c of the detected body 5 so as to provide the deformation starting position P above the root of the rotation transmission portion 5b. It is characterized by a point. Therefore, when the rotation detection device A is disposed in the mounting portion of the hub 10a in an inappropriate state, even if the transmission piece 5c is pushed by the protruding portion 10b, the rotation transmission portion 5b of the rotated body 5 is used. Since the amount of displacement is smaller than in the case of deformation from the root of the wire, the occurrence of breakage can be suppressed.

また、回転検出装置Ａは、第２の収納部１ｃの高さＨを、回転検出装置Ａをハブ１０ａに装着する際に、ハブ１０ａの突設部１０ｂのハウジング１内への押し込まれる量（オフセット量）を考慮し設定することに特徴を有するものである。回転検出装置Ａのハブ１０ａにおける取付部への取り付け状態が不適正な場合、即ちハブ１０ａの突設部１０ｂと伝達片部５ｂとが重なってしまう場合に、回転検出装置Ａを２輪車のフロントフォーク（図示しない）とハブ１０ａとの間に共締めすると、伝達片部５ｂが第２の収納部１ｃの底面方向へ突設部１０ｂによって押されることで変形するが、ハウジング１の第３の収納部１ｄに配設されるシール部材４が、ハブ１０ａの突出部１０ｂの周縁に形成される凹部１０ｃの適正位置に配設された際に、第２の収納部１ｃの底面（ハウジング１の内壁）に伝達片部５ｃが当接しない空間部ＳＳを有する点に特徴を有するものである。   Further, the rotation detection device A determines the height H of the second storage portion 1c so that when the rotation detection device A is mounted on the hub 10a, the protrusion 10b of the hub 10a is pushed into the housing 1 ( It is characterized by setting in consideration of the offset amount. When the attachment state of the rotation detection device A to the attachment portion of the hub 10a is inappropriate, that is, when the projecting portion 10b of the hub 10a and the transmission piece portion 5b overlap each other, the rotation detection device A is attached to the two-wheeled vehicle. When the front fork (not shown) and the hub 10a are fastened together, the transmission piece 5b is deformed by being pushed by the projecting portion 10b toward the bottom surface of the second storage portion 1c. When the seal member 4 disposed in the housing portion 1d is disposed at an appropriate position of the concave portion 10c formed in the peripheral edge of the protruding portion 10b of the hub 10a, the bottom surface (housing 1) of the second housing portion 1c is formed. It has a feature in that it has a space portion SS in which the transmission piece portion 5c does not abut on the inner wall.

従って、不適正な状態にて回転検出装置Ａがハブ１０に配設された際に、第２の収納部１ｃの底面に伝達片部５ｃが当接した状態で突設部１０ｂによって下方側から必要以上に押されると、突設部１０ｂによって変形可能な材料からなる伝達片部５ｃを破損させる恐れがあるが、伝達片部５ｃと第２の収納部１ｃの底面とが当接しない空間部ＳＳを有することで、伝達片部５ｃがフリーな状態となり、突設部１０ｂによって伝達片部５ｃが下方側から押されても破損する恐れがなくなる。   Accordingly, when the rotation detection device A is disposed on the hub 10 in an inappropriate state, the projecting portion 10b contacts the bottom surface of the second storage portion 1c from the lower side with the projecting portion 10b. If pushed more than necessary, the transmission piece 5c made of a deformable material may be damaged by the projecting portion 10b, but the space where the transmission piece 5c and the bottom surface of the second storage portion 1c do not come into contact with each other. By having the SS, the transmission piece 5c is in a free state, and even if the transmission piece 5c is pushed from the lower side by the protruding portion 10b, there is no possibility of breakage.

かかる回転検出装置Ａは、前輪ホイール１０が装着される車軸Ｓを挿通するための挿通部１ａを備えたハウジング１と、挿通部１ａの外周に対して回転自在に配設される筒状の胴部５ａを備えるとともに、前輪ホイール１０の回転を胴部５ａに伝達する回転伝達部５ｂを備える被検出体５と、外周面に複数の磁極を有するように着磁された胴部５ａの回転による磁極の変化を検出する磁気検出素子３と、を備え、前輪ホイール１０のハブ１０ａとフロントフォークとの間に挟持された状態で配設されるものに関し、回転伝達部５ｂは、ハブ１０ａの取付部への取付状態が不適正な状態である場合に変形可能な材料にて形成される伝達片部５ｃを一体に備え、伝達片部５ｃは、回転伝達部５ｂのハブ１０ａ側となる根元より上方に変形起点位置Ｐを設けるべく肉抜き部５ｄが形成されてなるものである。従って、被回転体５の回転伝達部５ｂの底辺から変形する場合に比べ、その変位量は少なくなるため、破損の発生を抑制することができるため、再び前輪ホイール１０のハブ１０ａに組み付けることが可能となる。   Such a rotation detection device A includes a housing 1 having an insertion portion 1a for inserting an axle S on which a front wheel 10 is mounted, and a cylindrical body that is rotatably arranged with respect to the outer periphery of the insertion portion 1a. Rotation of the body to be detected 5 provided with a part 5a and a rotation transmission part 5b for transmitting the rotation of the front wheel 10 to the body part 5a, and the body part 5a magnetized so as to have a plurality of magnetic poles on the outer peripheral surface A rotation detecting portion 5b, which is provided in a state of being sandwiched between the hub 10a of the front wheel 10 and the front fork. A transmission piece 5c formed of a deformable material when the mounting state to the part is in an inappropriate state is integrally provided, and the transmission piece 5c is formed from the base on the hub 10a side of the rotation transmission part 5b. Deformation start position upward In which the hollow portions 5d is formed to provide a. Accordingly, since the amount of displacement is smaller than that when the rotation transmitting portion 5b of the rotated body 5 is deformed from the bottom, it is possible to suppress the occurrence of breakage, and therefore it is possible to assemble the hub 10a of the front wheel 10 again. It becomes possible.

また、ハウジング１は、伝達片部５ｃが変形した場合に、伝達片部５ｃがハウジング１の第２の収納部１ｃの底面に当接しない空間部ＳＳを有してなるものであり、伝達片部５ｃがフリーな状態となり、突設部１０ｂによって下方側から押されても破損する恐れがない。   The housing 1 has a space SS where the transmission piece 5c does not contact the bottom surface of the second storage portion 1c of the housing 1 when the transmission piece 5c is deformed. The part 5c is in a free state, and there is no possibility of being damaged even if it is pushed from below by the projecting part 10b.

また、被検出体５は、胴部５ａと伝達片部５ｃを備える回転伝達部５ｂとがインサート成形によって一体的に形成されることから、被検出体５のハウジング１への組み付け性を向上させることができる。   Moreover, since the to-be-detected body 5 is integrally formed by insert molding with the trunk | drum 5a and the rotation transmission part 5b provided with the transmission piece part 5c, the assembly property to the housing 1 of the to-be-detected body 5 is improved. be able to.

尚、本発明の実施形態では、被検出体５の回転に伴う磁極の変化を磁気検出素子３によって検出し、この検出信号を車両用メータ等に伝達する電気式の回転検出装置を例に挙げて説明したが、本発明の構造にあっては、ハウジングの挿通部に、前輪ホイールのハブの取付部に噛み合う伝達片部を備えた被回転体を装着し、被回転体の胴部に形成された歯部にウォームギアを噛合させ、前記ウォームギアの回転をケーブルに伝達し、このケーブルを車両用メータ等に接続する機械式の回転伝達装置に適用するものであっても良い。   In the embodiment of the present invention, an electric rotation detection device that detects a change in the magnetic pole accompanying the rotation of the detection object 5 by the magnetic detection element 3 and transmits the detection signal to a vehicle meter or the like is taken as an example. However, in the structure of the present invention, a rotating body provided with a transmission piece portion that meshes with a mounting portion of the hub of the front wheel is attached to the insertion portion of the housing, and formed on the trunk portion of the rotating body. The worm gear may be meshed with the formed tooth portion, the rotation of the worm gear may be transmitted to a cable, and the mechanical rotation transmission device connected to the vehicle meter or the like may be applied.

本発明の実施形態を示す回転検出装置の要部断面図である。It is principal part sectional drawing of the rotation detection apparatus which shows embodiment of this invention. 同上実施形態の回転検出装置の要部拡大断面図である。It is a principal part expanded sectional view of the rotation detection apparatus of embodiment same as the above. 同上実施形態の回転検出装置の要部拡大断面図である。It is a principal part expanded sectional view of the rotation detection apparatus of embodiment same as the above.

符号の説明Explanation of symbols

Ａ 回転検出装置（回転伝達装置）
１ ハウジング
１ａ 挿通部
１ｂ 第１の収納部
１ｃ 第２の収納部
１ｄ 第３の収納部
１ｅ 第４の収納部
２ 回路基板
３ 磁気検出素子（磁気検出手段）
４ シール部材
５ 被検出体（被回転体）
５ａ 胴部
５ｂ 回転伝達部
５ｃ 伝達片部
５ｄ 肉抜き部
Ｓ シャフト
ＳＳ 空間部
Ｐ 変形起点位置 A Rotation detector (Rotation transmission device)
DESCRIPTION OF SYMBOLS 1 Housing 1a Insertion part 1b 1st accommodating part 1c 2nd accommodating part 1d 3rd accommodating part 1e 4th accommodating part 2 Circuit board 3 Magnetic detection element (magnetic detection means)
4 Seal member 5 Object to be detected (Rotated object)
5a Body 5b Rotation transmission part 5c Transmission piece part 5d Thinning part S Shaft SS Space part P Deformation origin position

Claims (4)

車輪が装着される車軸を挿通するための挿通部を備えたハウジングと、前記ハウジング内に配設され、前記挿通部の外周に対して回転自在に配設される筒状の胴部を備えるとともに、前記車輪の回転を前記胴部に伝達する回転伝達部を備える被回転体と、を備え、前記車輪のハブとフロントフォークとの間に挟持された状態で配設される回転伝達装置であって、
前記回転伝達部は、前記ハブの取付部への取付状態が不適正な状態である場合に変形可能な材料にて形成される伝達片部を一体に備え、前記伝達片部は、前記回転伝達部の前記ハブ側となる根元より上方に変形起点位置を設けるべく肉抜き部が形成されてなることを特徴とする回転伝達装置。 A housing having an insertion portion for inserting an axle on which a wheel is mounted, and a cylindrical body portion disposed in the housing and rotatably disposed with respect to the outer periphery of the insertion portion; A rotation transmission device that includes a rotation transmission unit that transmits a rotation of the wheel to the body, and is disposed in a state of being sandwiched between a hub and a front fork of the wheel. And
The rotation transmitting portion integrally includes a transmission piece portion formed of a deformable material when the mounting state of the hub to the mounting portion is inappropriate, and the transmission piece portion is configured to transmit the rotation transmission. A rotation transmission device, characterized in that a lightening portion is formed so as to provide a deformation starting position above a base on the hub side of the portion. 前記ハウジングは、前記伝達片部が変形した場合に、前記伝達片部が前記ハウジングの内壁に当接しない空間部を有してなることを特徴とする請求項１に記載の回転伝達装置。   2. The rotation transmission device according to claim 1, wherein the housing includes a space portion in which the transmission piece portion does not contact the inner wall of the housing when the transmission piece portion is deformed. 前記被回転体は、前記胴部と前記回転伝達部とがインサート成形によって一体的に形成されてなることを特徴とする請求項１に記載の回転伝達装置。   The rotation transmission device according to claim 1, wherein the body to be rotated is formed by integrally forming the body portion and the rotation transmission portion by insert molding. 前記胴部を磁性体材料から構成するとともに前記胴部の外周表面に複数の磁極を有するように構成し、前記胴部の回転を前記ハウジングに配設される磁気検出手段によって検出するように構成されてなることを特徴とする請求項１に記載の回転伝達装置。   The body portion is made of a magnetic material and has a plurality of magnetic poles on the outer peripheral surface of the body portion, and the rotation of the body portion is detected by magnetic detection means disposed in the housing. The rotation transmission device according to claim 1, wherein the rotation transmission device is formed.

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