JP2009090937A - Hubcap, wheel speed sensor mounting structure, and wheel speed sensor mounting method - Google Patents

Hubcap, wheel speed sensor mounting structure, and wheel speed sensor mounting method Download PDF

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JP2009090937A
JP2009090937A JP2007265972A JP2007265972A JP2009090937A JP 2009090937 A JP2009090937 A JP 2009090937A JP 2007265972 A JP2007265972 A JP 2007265972A JP 2007265972 A JP2007265972 A JP 2007265972A JP 2009090937 A JP2009090937 A JP 2009090937A
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Prior art keywords
wheel speed
speed sensor
hub cap
insertion port
detection
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JP2007265972A
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Japanese (ja)
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Shuntaro Mori
俊太朗 森
Hirotatsu Kamimura
宏達 神村
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Nissan Motor Co Ltd
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Nissan Motor Co Ltd
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Priority to JP2007265972A priority Critical patent/JP2009090937A/en
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    • 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/723—Shaft end sealing means, e.g. cup-shaped caps or covers
    • 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F16C19/186—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with three raceways provided integrally on parts other than race rings, e.g. third generation hubs
    • 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
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors
    • 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
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F16C41/007—Encoders, e.g. parts with a plurality of alternating magnetic poles

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hubcap which is equipped with a heightened seal performance of a through port without inviting an increase in the number of component parts and which is capable of preventing entry of foreign matters into within it, a wheel speed sensor mounting structure, and a wheel speed sensor mounting method. <P>SOLUTION: The hubcap 9 has an opening 20 smaller in size than the contour of a detection part 14 along the internal peripheral rim of the through port 17, while being equipped with a lip part 21 that resiliently comes in contact with the lateral face outer periphery of the detection part 14 by being elastically deformed in the direction in which the detection part 14 is inserted at the time of its insertion. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、車輪速センサの検出部を挿入する挿通口を有するハブキャップおよびそれを用いた車輪速センサ取り付け構造および車輪速センサ取り付け方法の技術分野に関する。   The present invention relates to a technical field of a hub cap having an insertion port into which a detection portion of a wheel speed sensor is inserted, a wheel speed sensor mounting structure using the hub cap, and a wheel speed sensor mounting method.

従来、車輪速センサは、アクスルハウジングの軸孔の開口部を覆うハブキャップに設けられた挿通口に検出部を挿入した状態で、アクスルハウジングにボルト締結されている（例えば、特許文献１参照。）。
特開２００５−１７２５８５号公報 Conventionally, a wheel speed sensor is bolted to an axle housing in a state where a detection portion is inserted into an insertion port provided in a hub cap that covers an opening of a shaft hole of the axle housing (see, for example, Patent Document 1). ).
JP 2005-172585 A

しかしながら、上記従来技術にあっては、車輪速センサを取り付ける際、検出部の挿入容易性を確保するために、挿通口の形状は検出部の外形よりも大きく設定されているため、センサの取り付け時には挿通口と検出部との間に隙間が生じた状態となる。よって、車両の走行中、挿通口と検出部との間の隙間から泥水や砂利等の異物がハブキャップ内に侵入し、車輪速検出精度の悪化を招くという問題があった。   However, in the above prior art, when attaching the wheel speed sensor, in order to ensure the ease of insertion of the detection unit, the shape of the insertion port is set larger than the outer shape of the detection unit. Sometimes, a gap is generated between the insertion port and the detection unit. Therefore, there is a problem that during traveling of the vehicle, foreign matter such as muddy water and gravel enters the hub cap from the gap between the insertion port and the detection unit, resulting in deterioration of wheel speed detection accuracy.

本発明は、上記問題に着目してなされたもので、その目的とするところは、部品点数増を招くことなく挿通口のシール性を高めることができ、ハブキャップ内への異物侵入を防止できるハブキャップ、車輪速センサ取り付け構造および車輪速センサ取り付け方法を提供することにある。   The present invention has been made paying attention to the above-mentioned problems, and the object of the present invention is to improve the sealing performance of the insertion port without causing an increase in the number of parts, and to prevent foreign matter from entering the hub cap. To provide a hub cap, a wheel speed sensor mounting structure, and a wheel speed sensor mounting method.

上記目的を達成するため、本発明のハブキャップでは、車輪速センサの検出部を挿入する挿通口の内周縁に、検出部の外形よりも小さな内径を有し、検出部の挿入時に挿入方向へ弾性変形して検出部の側面外周と弾接するリップ部を備えることを特徴とする。   In order to achieve the above object, the hub cap of the present invention has an inner diameter smaller than the outer shape of the detecting portion at the inner peripheral edge of the insertion port for inserting the detecting portion of the wheel speed sensor, and is inserted in the inserting direction when the detecting portion is inserted. A lip portion that elastically deforms and elastically contacts the outer periphery of the side surface of the detection portion is provided.

本発明のハブキャップでは、リップ部と検出部の側面外周との弾接によりリップ部が検出部の側面外周と密着し、挿通口と検出部との間の隙間を全周に亘ってリップ部で塞ぐことができるため、部品点数増を招くことなく挿通口のシール性を高めることができ、ハブキャップ内への異物侵入を防止することができる。   In the hub cap according to the present invention, the lip portion comes into close contact with the outer periphery of the side surface of the detection portion by elastic contact between the lip portion and the outer periphery of the side surface of the detection portion, and the gap between the insertion port and the detection portion extends over the entire circumference. Therefore, the sealing property of the insertion port can be improved without increasing the number of parts, and foreign matter can be prevented from entering the hub cap.

以下、本発明を実施するための最良の形態を、実施例１〜３に基づいて説明する。   Hereinafter, the best mode for carrying out the present invention will be described based on Examples 1 to 3.

図１は、実施例１の車輪速センサ取り付け構造を示す車両のリアアクスル要部の側面断面図である。   1 is a side sectional view of a main part of a rear axle of a vehicle showing a wheel speed sensor mounting structure according to a first embodiment.

サスペンション部材（不図示）に支持されるアクスルハウジング１と、タイヤホイール（不図示）を支持する車輪ハブ２との間には、ベアリング３を介装している。ベアリング３の外輪４には、嵌合部４ａを形成し、この嵌合部４ａをアクスルハウジング１の軸孔５の開口部６側から嵌挿している。なお、外輪４には、アクスルハウジング１の開口部６に対する取り付け側の外周部には、図示しない締結部を突設し、この締結部においてアクスルハウジング１の側面に図示しないボルトによって締結固定している。ベアリング３の内輪７は、車輪ハブ２と一体に設けている。車輪ハブ２には、タイヤホイールを締結する複数のハブボルト８を突設している。   A bearing 3 is interposed between an axle housing 1 supported by a suspension member (not shown) and a wheel hub 2 supporting a tire wheel (not shown). A fitting portion 4 a is formed on the outer ring 4 of the bearing 3, and the fitting portion 4 a is fitted from the opening 6 side of the shaft hole 5 of the axle housing 1. The outer ring 4 is provided with a fastening portion (not shown) on the outer peripheral portion of the axle housing 1 attached to the opening 6 and is fastened and fixed to the side surface of the axle housing 1 with a bolt (not shown). Yes. The inner ring 7 of the bearing 3 is provided integrally with the wheel hub 2. A plurality of hub bolts 8 for fastening the tire wheel are protruded from the wheel hub 2.

実施例１のハブキャップ９は、アクスルハウジング１の軸孔５の開口部１０側から車輪ハブ２側への砂利や泥水等の異物の侵入を防止するためのもので、アクスルハウジング１の軸孔５内に配置している。軸孔５の開口部１０側には段差部１１を形成し、この段差部１１と外輪４の嵌合部４ａとによりハブキャップ９の軸方向移動を規制している。   The hub cap 9 according to the first embodiment is for preventing foreign matter such as gravel and muddy water from entering from the opening 10 side of the shaft hole 5 of the axle housing 1 to the wheel hub 2 side. 5 is arranged. A step portion 11 is formed on the opening 10 side of the shaft hole 5, and the axial movement of the hub cap 9 is restricted by the step portion 11 and the fitting portion 4 a of the outer ring 4.

車輪速を検出する車輪速センサ１２は、アクスルハウジング１の軸孔５の開口部１０側端面に取り付けている。車輪速センサ１２は、固定部１３と検出部１４とからなり、固定部１３は、アクスルハウジング１の軸孔５の開口部１０側端面に形成した取り付け凹部１５に嵌め込んだ状態で、ボルト１６によりアクスルハウジング１に固定している。   The wheel speed sensor 12 that detects the wheel speed is attached to the end face of the axle hole 5 of the axle housing 1 on the opening 10 side. The wheel speed sensor 12 includes a fixing portion 13 and a detection portion 14, and the fixing portion 13 is fitted into a mounting recess 15 formed on the end surface on the opening 10 side of the shaft hole 5 of the axle housing 1, and the bolt 16 Is fixed to the axle housing 1.

図２は、図１の検出部１４付近を拡大した図であり、車輪速センサ１２の検出部１４は、ハブキャップ９の挿通口１７を貫通し、軸孔５を通して車輪ハブ２側に臨んでいる。検出部１４は、ベアリング３の内輪７に取り付けたセンサロータ１８に対向し、センサロータ１８の回転による磁束変動を検出し電気信号に変換して出力する。これにより、センサロータ１８と一体に回転する車輪ハブ２、すなわち車輪の回転数を検出することができる。検出部１４には、凹部１４ａ，１４ｂを設けている。なお、センサロータ１８に隣接する位置であって、外輪４と内輪７との間には、シール１９を介装している。   FIG. 2 is an enlarged view of the vicinity of the detection unit 14 of FIG. 1, and the detection unit 14 of the wheel speed sensor 12 passes through the insertion port 17 of the hub cap 9 and faces the wheel hub 2 side through the shaft hole 5. Yes. The detection unit 14 faces the sensor rotor 18 attached to the inner ring 7 of the bearing 3, detects a magnetic flux variation due to the rotation of the sensor rotor 18, converts it into an electrical signal, and outputs it. Thereby, the wheel hub 2 that rotates integrally with the sensor rotor 18, that is, the number of rotations of the wheel can be detected. The detection unit 14 is provided with recesses 14a and 14b. A seal 19 is interposed between the outer ring 4 and the inner ring 7 at a position adjacent to the sensor rotor 18.

ハブキャップ９の挿通口１７には、リップ部２１を設けている。このリップ部２１は、アクスルハウジング１の軸孔５の開口部６側に向かって傾斜した状態で、検出部１４の側面に弾接している。ここで、「弾接」とは、所定の付勢力を持って隙間無く接触した状態をいう。   A lip portion 21 is provided in the insertion port 17 of the hub cap 9. The lip portion 21 is in elastic contact with the side surface of the detection portion 14 while being inclined toward the opening 6 side of the shaft hole 5 of the axle housing 1. Here, “elastic contact” refers to a state in which a predetermined urging force is applied and there is no gap.

次に、実施例１のハブキャップ９の構成について説明する。図３は実施例１のハブキャップ９の正面図、図４は実施例１のハブキャップ９の側面断面図である。   Next, the structure of the hub cap 9 of Example 1 is demonstrated. 3 is a front view of the hub cap 9 of the first embodiment, and FIG. 4 is a side sectional view of the hub cap 9 of the first embodiment.

ハブキャップ９は、例えば、ポリプロピレン等の合成樹脂によって中心部分が厚み方向の一方側（軸孔５の開口部１０側）に膨らんだハット形状に成型している。ハブキャップ９の厚み方向一方側面には、５つの補強リブ９ａを中心側から半径方向に沿って放射状に設けている。この補強リブ９ａは、ハブキャップ９の外周側に至って自然消滅するように形成している。ハブキャップ９の挿通口１７に対し下部側には、係合突部９ｂを設けている。この係合突部９ｂは、ハブキャップ９をアクスルハウジング１の軸孔５に嵌め込む際、軸孔５に形成された係合凹部（不図示）と係合させることで、ハブキャップ９のアクスルハウジング１に対する周方向の位置決めを行うものである。   The hub cap 9 is formed in a hat shape in which the central portion is swelled on one side in the thickness direction (on the opening 10 side of the shaft hole 5) with a synthetic resin such as polypropylene, for example. On one side surface of the hub cap 9 in the thickness direction, five reinforcing ribs 9a are provided radially from the center side along the radial direction. This reinforcing rib 9a is formed so as to reach the outer peripheral side of the hub cap 9 and disappear naturally. An engaging projection 9 b is provided on the lower side with respect to the insertion port 17 of the hub cap 9. When the hub cap 9 is fitted into the shaft hole 5 of the axle housing 1, the engagement protrusion 9 b is engaged with an engagement recess (not shown) formed in the shaft hole 5, so that the axle of the hub cap 9 is engaged. Positioning in the circumferential direction with respect to the housing 1 is performed.

ハブキャップ９の挿通口１７は、車輪速センサ１２の検出部１４の外形よりも大きく設定している。リップ部２１は、検出部１４の外形よりも小さな開口２０を有し、検出部１４の挿入方向に向かって角度を有している。この角度は、挿通口１７の軸直交方向に対して、例えば30°に設定する。このリップ部２１は、ハブキャップ９の厚みよりも薄く形成されており、検出部１４の挿入時、検出部１４の端面に押されることで挿入方向へ向かって弾性変形するように設定している。   The insertion port 17 of the hub cap 9 is set to be larger than the outer shape of the detection unit 14 of the wheel speed sensor 12. The lip portion 21 has an opening 20 smaller than the outer shape of the detection unit 14 and has an angle toward the insertion direction of the detection unit 14. This angle is set to, for example, 30 ° with respect to the direction perpendicular to the axis of the insertion port 17. The lip portion 21 is formed thinner than the hub cap 9, and is set so as to be elastically deformed in the insertion direction by being pushed by the end surface of the detection portion 14 when the detection portion 14 is inserted. .

ハブキャップ９の厚み方向一方側面には、挿通口１７の内周縁に沿って略Ｕ字状のリブ部９ｃを設けている。このリブ部９ｃは、ハブキャップ９に車輪速センサ１２の検出部１４を挿入する際、ハブキャップ９の変形を抑制して挿通口１７の形状を維持し、作業性を確保するためのものである。   A substantially U-shaped rib portion 9 c is provided along the inner peripheral edge of the insertion port 17 on one side surface in the thickness direction of the hub cap 9. The rib portion 9c is provided to suppress the deformation of the hub cap 9 and maintain the shape of the insertion port 17 and to ensure workability when the detection portion 14 of the wheel speed sensor 12 is inserted into the hub cap 9. is there.

次に、作用を説明する。
実施例１のハブキャップ９および車輪速センサ１２の取り付け方法を説明する。
まず、アクスルハウジング１の一方の開口部６に外輪４の嵌合部４ａを圧入しつつ、図示しないボルトによって、外輪４をアクスルハウジング１に締結固定する。この際、あらかじめ両者間にハブキャップ９を挿入しておき、両者の固定によって形成される軸孔５内の空間にハブキャップ９を収容する。このとき、ハブキャップ９には周方向の位置決めのための係合突部９ｂを設けているため、この係合突部９ｂを軸孔５に形成された係合凹部（不図示）と係合させることで、ハブキャップ９のアクスルハウジング１に対する周方向の位置決めを簡単かつ適正に行うことができる。 Next, the operation will be described.
A method for attaching the hub cap 9 and the wheel speed sensor 12 according to the first embodiment will be described.
First, the outer ring 4 is fastened and fixed to the axle housing 1 with a bolt (not shown) while the fitting portion 4 a of the outer ring 4 is press-fitted into one opening 6 of the axle housing 1. At this time, the hub cap 9 is inserted in advance between the two, and the hub cap 9 is accommodated in a space in the shaft hole 5 formed by fixing the both. At this time, since the hub cap 9 is provided with an engagement protrusion 9b for positioning in the circumferential direction, the engagement protrusion 9b is engaged with an engagement recess (not shown) formed in the shaft hole 5. By doing so, the circumferential positioning of the hub cap 9 with respect to the axle housing 1 can be performed easily and appropriately.

次に、車輪速センサ１２の検出部１４を、リップ部２１を変形させながらハブキャップ９の挿通口１７に挿通する。このとき、ハブキャップ９には挿通口１７の内周縁に沿ってリブ部９ｃを設けているため、作業者がリップ部２１を変形させようとする力がハブキャップ９を変形させる力へと変化するのを抑制できる。   Next, the detecting portion 14 of the wheel speed sensor 12 is inserted into the insertion port 17 of the hub cap 9 while the lip portion 21 is deformed. At this time, since the hub cap 9 is provided with the rib portion 9 c along the inner peripheral edge of the insertion port 17, the force that the operator tries to deform the lip portion 21 changes to the force that deforms the hub cap 9. Can be suppressed.

つまり、ハブキャップ９は合成樹脂製で可撓性を有するため、リブ部９ｃを設けていない場合には、作業者がリップ部２１を押す力は挿通口１７の周辺部に分散され、ハブキャップ９が変形して挿通口１７の形状が変わることで、検出部１４の挿入作業に手間を要する。   That is, since the hub cap 9 is made of synthetic resin and has flexibility, when the rib portion 9c is not provided, the force by which the operator pushes the lip portion 21 is distributed to the peripheral portion of the insertion port 17, and the hub cap 9 9 is deformed and the shape of the insertion port 17 is changed, so that it takes time to insert the detection unit 14.

これに対し、実施例１では、作業者がリップ部２１を押す力が挿通口１７の周囲へ分散されるのをリブ部９ｃで防ぐことができるため、挿通口１７の変形が抑制され、作業者は小さな力で検出部１４を挿通口１７に挿入させることができる。   On the other hand, in Example 1, since the rib part 9c can prevent that the operator's pushing force on the lip portion 21 is dispersed around the insertion port 17, deformation of the insertion port 17 is suppressed, A person can insert the detection unit 14 into the insertion port 17 with a small force.

また、リップ部２１を、ハブキャップ９の厚みよりも薄くし、検出部１４の挿入方向に向かって傾斜させた状態で形成したため、検出部１４でリップ部２１を押圧して弾性変形させる際、より小さな力で弾性変形させることができる。   Further, since the lip portion 21 is formed to be thinner than the hub cap 9 and inclined toward the insertion direction of the detection portion 14, when the lip portion 21 is pressed and elastically deformed by the detection portion 14, It can be elastically deformed with a smaller force.

上記の方法によりハブキャップ９に取り付けられた車輪速センサ１２は、リップ部２１が検出部１４の側面全周に亘って弾接しているため、挿通口１７と検出部１４との間が隙間なくリップ部２１で塞がれた状態である。これにより、挿通口１７のシール性を高めることができ、車輪ハブ２側への泥水や砂利等の異物の侵入を防止することができる。   In the wheel speed sensor 12 attached to the hub cap 9 by the above method, the lip portion 21 is in elastic contact with the entire circumference of the side surface of the detection portion 14, so that there is no gap between the insertion port 17 and the detection portion 14. The lip portion 21 is in a closed state. Thereby, the sealing performance of the insertion port 17 can be improved, and intrusion of foreign matters such as muddy water and gravel to the wheel hub 2 side can be prevented.

また、車輪速センサ１２は、固定部１３がアクスルハウジング１にボルト締結されるのに加え、検出部１４がリップ部２１との弾接によりハブキャップ９に支持される２点支持構造であるため、従来のボルト締結のみによる１点支持構造と比較して、走行時における車輪速センサ１２の振動を抑制でき、センシング精度（車輪速検出精度）を高めることができる。   The wheel speed sensor 12 has a two-point support structure in which the fixing portion 13 is bolted to the axle housing 1 and the detection portion 14 is supported by the hub cap 9 by elastic contact with the lip portion 21. Compared with the conventional one-point support structure that uses only bolt fastening, vibration of the wheel speed sensor 12 during traveling can be suppressed, and sensing accuracy (wheel speed detection accuracy) can be increased.

次に、効果を説明する。
実施例１の車輪速センサ取り付け構造にあっては、以下に列挙する効果を奏する。 Next, the effect will be described.
The wheel speed sensor mounting structure according to the first embodiment has the following effects.

(1) ハブキャップ９は、挿通口１７の内周縁に、検出部１４の外形よりも小さな開口２０を有し、検出部１４の挿入時に挿入方向へ弾性変形して検出部１４の側面外周と弾接するリップ部２１を備えるため、シール等の別部品を用いて部品点数増を招くことなく挿通口１７のシール性を高めることができ、車輪ハブ２側への泥水や砂利等の異物の侵入を防止することができる。また、ボルト締結とリップ部２１の弾接とによる車輪速センサ１２の２点支持構造により、走行時における車輪速センサ１２の振動を抑制でき、センシング精度を高めることができる。   (1) The hub cap 9 has an opening 20 on the inner peripheral edge of the insertion port 17 that is smaller than the outer shape of the detection unit 14, and elastically deforms in the insertion direction when the detection unit 14 is inserted. Since the lip portion 21 is elastically contacted, the sealing performance of the insertion port 17 can be improved without increasing the number of parts by using another part such as a seal, and foreign matter such as muddy water and gravel enters the wheel hub 2 side. Can be prevented. Further, the two-point support structure of the wheel speed sensor 12 by the bolt fastening and the elastic contact of the lip portion 21 can suppress vibration of the wheel speed sensor 12 during traveling and increase the sensing accuracy.

(2) ハブキャップ９は、挿通口１７の内周縁に沿って補強用のリブ部９ｃを備えるため、リップ部２１を弾性変形させながら検出部１４を挿通口１７に挿入する際の挿通口１７の変形を抑制でき、作業者は小さな力で検出部１４を挿通口１７に挿入させることができる。   (2) Since the hub cap 9 includes the reinforcing rib portion 9 c along the inner peripheral edge of the insertion port 17, the insertion port 17 when the detection unit 14 is inserted into the insertion port 17 while elastically deforming the lip portion 21. Therefore, the operator can insert the detection unit 14 into the insertion port 17 with a small force.

(3) リップ部２１は、検出部１４の挿入方向に向かって角度を有するため、より小さな力でリップ部２１を弾性変形させながら検出部１４を挿通口１７に挿入することができ、作業の容易化を図ることができる。   (3) Since the lip portion 21 has an angle toward the insertion direction of the detection portion 14, the detection portion 14 can be inserted into the insertion port 17 while elastically deforming the lip portion 21 with a smaller force. Simplification can be achieved.

(4) アクスルハウジング１の軸孔５の開口部６を覆うハブキャップの挿通口１７に車輪速センサ１２の検出部１４を挿入し、車輪速センサ１２の固定部１３をアクスルハウジング１にボルト締結する車輪速センサ取り付け構造において、ハブキャップとして、実施例１のハブキャップ９を用いた。これにより、シール等の別部品を用いて部品点数増を招くことなく挿通口１７のシール性を高めることができ、車輪ハブ２側への泥水や砂利等の異物の侵入を防止することができる。また、ボルト締結とリップ部２１の弾接とによる車輪速センサ１２の２点支持構造により、走行時における車輪速センサ１２の振動を抑制でき、センシング精度を高めることができる。   (4) The detection part 14 of the wheel speed sensor 12 is inserted into the insertion port 17 of the hub cap that covers the opening 6 of the axle hole 5 of the axle housing 1, and the fixing part 13 of the wheel speed sensor 12 is bolted to the axle housing 1. In the wheel speed sensor mounting structure, the hub cap 9 of Example 1 was used as the hub cap. Thereby, the sealing performance of the insertion port 17 can be improved without causing an increase in the number of parts by using another part such as a seal, and entry of foreign matter such as muddy water and gravel into the wheel hub 2 side can be prevented. . Further, the two-point support structure of the wheel speed sensor 12 by the bolt fastening and the elastic contact of the lip portion 21 can suppress vibration of the wheel speed sensor 12 during traveling and increase the sensing accuracy.

(5) アクスルハウジング１の軸孔５の開口部６を覆うハブキャップの挿通口１７に車輪速センサ１２の検出部１４を挿入し、車輪速センサ１２の固定部１３をアクスルハウジング１にボルト締結する車輪速センサ取り付け方法において、車輪速センサ１２の検出部１４をハブキャップ９の挿通口１７に挿入する際、挿通口１７の内周縁に、検出部１４の外形よりも小さな開口２０を有するリップ部２１を設けておき、検出部１４の先端でリップ部２１を弾性変形させつつ、検出部１４を挿通口１７に挿入する。これにより、検出部１４を挿通口１７に挿入したとき、リップ部２１を検出部１４の側面外周と弾接させ、挿通口１７のシール性を高めることができる。   (5) The detecting portion 14 of the wheel speed sensor 12 is inserted into the insertion port 17 of the hub cap that covers the opening 6 of the axle hole 5 of the axle housing 1, and the fixing portion 13 of the wheel speed sensor 12 is bolted to the axle housing 1. In the wheel speed sensor mounting method, when the detection unit 14 of the wheel speed sensor 12 is inserted into the insertion port 17 of the hub cap 9, a lip having an opening 20 smaller than the outer shape of the detection unit 14 on the inner peripheral edge of the insertion port 17. The detection unit 14 is inserted into the insertion port 17 while the lip 21 is elastically deformed at the tip of the detection unit 14. Thereby, when the detection part 14 is inserted in the insertion opening 17, the lip | rip part 21 can be elastically contacted with the outer periphery of the side surface of the detection part 14, and the sealing performance of the insertion opening 17 can be improved.

実施例２は、リップ部に検出部の凹部と係合する厚肉部を設けた例である。
なお、他の構成については実施例１と同様であるため、図示ならびに説明は省略する。 Example 2 is an example in which a lip portion is provided with a thick portion that engages with a concave portion of the detection portion.
Since other configurations are the same as those of the first embodiment, illustration and description thereof are omitted.

図５は、実施例２のハブキャップ９の挿通口１７を示す正面図であり、実施例２では、リップ部２１において、車輪速センサ１２の検出部１４に形成された凹部１４ａと対応する位置に、リップ部２１の他の部分２１ａよりも肉厚に形成し、検出部１４の挿入時に凹部１４ａと係合する厚肉部２１ｂを設けている。なお、厚肉部２１ｂは、弾性変形する必要上、ハブキャップ９の厚みよりも薄く形成している。   FIG. 5 is a front view showing the insertion port 17 of the hub cap 9 of the second embodiment. In the second embodiment, the position corresponding to the concave portion 14 a formed in the detection portion 14 of the wheel speed sensor 12 in the lip portion 21. In addition, a thick part 21b is provided which is thicker than the other part 21a of the lip part 21 and engages with the concave part 14a when the detection part 14 is inserted. The thick portion 21b is formed thinner than the hub cap 9 because it needs to be elastically deformed.

次に、作用を説明すると、車輪速センサ１２の検出部１４を、リップ部２１を変形させながらハブキャップ９の挿通口１７に挿入する際、リップ部２１の厚肉部２１ｂも他の部分２１ａと同様に、検出部１４の挿入方向に向かって弾性変形する。ここで、厚肉部２１ｂは、リップ部２１の他の部分２１ａよりも肉厚に形成しているため、他の部分２１ａよりも復元力が高い。よって、検出部１４の挿入後、厚肉部２１ｂは、復元力により元の形状へと戻り、検出部１４の凹部１４ａに係合した状態となる（図６）。このため、検出部１４をより強固にハブキャップ９に固定でき、車輪速センサ１２の振動をより小さく抑えてセンシング精度を高めることができる。   Next, the operation will be described. When the detecting portion 14 of the wheel speed sensor 12 is inserted into the insertion port 17 of the hub cap 9 while the lip portion 21 is deformed, the thick portion 21b of the lip portion 21 is also replaced with the other portion 21a. Similarly to the above, the elastic deformation is performed in the insertion direction of the detection unit 14. Here, since the thick part 21b is formed thicker than the other part 21a of the lip part 21, the restoring force is higher than that of the other part 21a. Therefore, after insertion of the detection part 14, the thick part 21b returns to the original shape by a restoring force and is in a state of being engaged with the concave part 14a of the detection part 14 (FIG. 6). For this reason, the detection part 14 can be fixed to the hub cap 9 more firmly, and the vibration of the wheel speed sensor 12 can be suppressed to be smaller, and the sensing accuracy can be increased.

次に、効果を説明する。
実施例２の車輪速センサ取り付け構造にあっては、実施例１の効果(1)〜(5)に加え、以下の効果を奏する。 Next, the effect will be described.
The wheel speed sensor mounting structure of the second embodiment has the following effects in addition to the effects (1) to (5) of the first embodiment.

(6) リップ部２１に検出部１４の凹部１４ａと係合する厚肉部２１ｂを設けたため、検出部１４をより強固にハブキャップ９に固定でき、車輪速センサ１２の振動をより小さく抑えてセンシング精度を高めることができる。   (6) Since the lip portion 21 is provided with the thick portion 21b that engages with the concave portion 14a of the detection portion 14, the detection portion 14 can be more firmly fixed to the hub cap 9, and vibration of the wheel speed sensor 12 can be suppressed to a smaller level. Sensing accuracy can be increased.

実施例３は、リップ部の四隅に切り欠き部を設けた例である。なお、他の構成については実施例１と同様であるため、図示ならびに説明は省略する。   Example 3 is an example in which cutout portions are provided at the four corners of the lip portion. Since other configurations are the same as those of the first embodiment, illustration and description thereof are omitted.

図７は、実施例３のハブキャップ９の挿通口１７を示す正面図であり、実施例３では、リップ部２１の四隅に切り欠き部２２を設けている。この切り欠き部２２は、リップ部２１の開口２０から径方向外側へ向かって挿入口１７の手前まで放射状に延び、切り欠き部２２の先端と挿入口１７との間には、僅かな隙間（例えば、1mm程度）を設定している。   FIG. 7 is a front view showing the insertion port 17 of the hub cap 9 according to the third embodiment. In the third embodiment, the notch portions 22 are provided at the four corners of the lip portion 21. The notch 22 extends radially from the opening 20 of the lip portion 21 radially outward to the front of the insertion port 17, and a slight gap (between the tip of the notch 22 and the insertion port 17 ( For example, about 1 mm) is set.

次に、作用を説明すると、実施例３では、リップ部２１の四隅に切り欠き部２２を設けたため、車輪速センサ１２の検出部１４を、リップ部２１を変形させながらハブキャップ９の挿通口１７に挿入する際、リップ部２１をより小さな力で挿入方向に弾性変形させることができる。また、リップ部２１の変形自由度が高いため、リップ部２１と検出部１４との密着性を高めることができる。   Next, the operation will be described. In Example 3, since the notches 22 are provided at the four corners of the lip portion 21, the detecting portion 14 of the wheel speed sensor 12 is inserted through the hub cap 9 while the lip portion 21 is deformed. When inserted into the lip 17, the lip portion 21 can be elastically deformed in the insertion direction with a smaller force. Further, since the degree of freedom of deformation of the lip portion 21 is high, the adhesion between the lip portion 21 and the detection portion 14 can be enhanced.

次に、効果を説明する。
実施例３の車輪速センサ取り付け構造にあっては、実施例１の効果(1)〜(5)に加え、以下の効果を奏する。 Next, the effect will be described.
The wheel speed sensor mounting structure of the third embodiment has the following effects in addition to the effects (1) to (5) of the first embodiment.

(7) リップ部２１の四隅に切り欠き部２２を設けたため、検出部１４の挿通口１７への挿入作業を行う際、リップ部２１を小さな力で弾性変形させることができ、作業性を確保することができるとともに、リップ部２１と検出部１４との密着性を高めてシール性の向上を図ることができる。   (7) Since the cutout portions 22 are provided at the four corners of the lip portion 21, the lip portion 21 can be elastically deformed with a small force when the detection portion 14 is inserted into the insertion port 17, ensuring workability. In addition, the adhesion between the lip portion 21 and the detection portion 14 can be improved to improve the sealing performance.

（他の実施例）
以上、本発明を実施するための最良の形態を、図面に基づく実施例１〜３により説明したが、本発明の具体的な構成は、実施例１〜３に示したものに限定されるものではなく、発明の要旨を変更しない程度の設計変更等があっても本発明に含まれる。 (Other examples)
The best mode for carrying out the present invention has been described with reference to the first to third embodiments based on the drawings. However, the specific configuration of the present invention is limited to that shown in the first to third embodiments. Instead, design changes that do not change the gist of the invention are included in the present invention.

例えば、実施例１〜３では、リアアクスルに車輪速センサを取り付ける例を示したが、本発明は、フロントアクスルにも適用可能である。
実施例２の厚肉部と実施例３の切り欠き部を共に備えた構成としてもよい。また、切り欠き部は、四隅以上設けてもよい。 For example, in the first to third embodiments, the example in which the wheel speed sensor is attached to the rear axle is shown, but the present invention is also applicable to the front axle.
It is good also as a structure provided with both the thick part of Example 2, and the notch part of Example 3. FIG. Moreover, you may provide a notch part more than four corners.

実施例１〜３では、挿通口付近を補強するリブ部を略Ｕ字状に形成した例を示したが、リブ部は挿通口の全周に亘って設けてもよい。また、ハブキャップの厚み方向両面にリブ部を設けた構成としてもよい。   In Examples 1-3, although the example which formed the rib part which reinforces the penetration opening vicinity in the substantially U shape was shown, you may provide a rib part over the perimeter of an insertion opening. Moreover, it is good also as a structure which provided the rib part in the thickness direction both surfaces of the hub cap.

実施例１の車輪速センサ取り付け構造を示す車両のリアアクスル要部の側面断面図である。It is side surface sectional drawing of the rear-axle principal part of the vehicle which shows the wheel speed sensor attachment structure of Example 1. FIG. 図１の検出部１４付近の拡大図である。FIG. 2 is an enlarged view of the vicinity of a detection unit 14 in FIG. 1. 実施例１のハブキャップ９の正面図である。FIG. 3 is a front view of the hub cap 9 according to the first embodiment. 実施例１のハブキャップ９の側面断面図である。3 is a side cross-sectional view of the hub cap 9 of Embodiment 1. FIG. 実施例２のハブキャップ９の挿通口１７を示す正面図である。It is a front view which shows the insertion port 17 of the hub cap 9 of Example 2. FIG. 実施例２の作用を示すハブキャップ９の挿通口１７を示す正面一部断面図である。FIG. 9 is a partial front sectional view showing an insertion port 17 of a hub cap 9 showing the operation of Example 2. 実施例３のハブキャップ９の挿通口１７を示す正面図である。It is a front view which shows the insertion port 17 of the hub cap 9 of Example 3. FIG.

符号の説明Explanation of symbols

１ アクスルハウジング
２ 車輪ハブ
３ ベアリング
４ 外輪
４ａ 嵌合部
５ 軸孔
６ 開口部
７ 内輪
８ ハブボルト
９ ハブキャップ
９ａ 補強リブ
９ｂ 係合突部
９ｃ リブ部
１０ 開口部
１１ 段差部
１２ 車輪速センサ
１３ 固定部
１４ 検出部
１４ａ，１４ｂ 凹部
１５ 取り付け凹部
１６ ボルト
１７ 挿通口
１８ センサロータ
１９ シール
２０ 開口
２１ リップ部
２１ａ 他の部分
２１ｂ 厚肉部
２２ 切り欠き部 DESCRIPTION OF SYMBOLS 1 Axle housing 2 Wheel hub 3 Bearing 4 Outer ring 4a Fitting part 5 Shaft hole 6 Opening part 7 Inner ring 8 Hub bolt 9 Hub cap 9a Reinforcement rib 9b Engaging protrusion 9c Rib part 10 Opening part 11 Step part 12 Wheel speed sensor 13 Fixation Part 14 detection part 14a, 14b recessed part 15 mounting recessed part 16 bolt 17 insertion port 18 sensor rotor 19 seal 20 opening 21 lip part 21a other part 21b thick part 22 notch part

Claims (7)

アクスルハウジングの軸孔の開口部を覆い、車輪速センサの検出部を挿入する車輪速センサの外形よりも大きな挿通口を有するハブキャップにおいて、
前記挿通口の内周縁に、前記検出部の外形よりも小さな開口を有し、前記検出部の挿入時に挿入方向へ弾性変形して検出部の側面外周と弾接するリップ部を備えることを特徴とするハブキャップ。 In the hub cap having an insertion port larger than the outer shape of the wheel speed sensor for covering the opening of the axle hole of the axle housing and inserting the detection part of the wheel speed sensor,
The inner periphery of the insertion opening has an opening smaller than the outer shape of the detection unit, and includes a lip portion that elastically deforms in the insertion direction when the detection unit is inserted and elastically contacts the outer periphery of the side surface of the detection unit. Hub cap to be used. 請求項１に記載のハブキャップにおいて、
前記挿通口の内周縁に沿って補強用のリブ部を設けたことを特徴とするハブキャップ。 The hub cap according to claim 1,
A hub cap, wherein a reinforcing rib portion is provided along an inner peripheral edge of the insertion opening. 請求項１または請求項２に記載のハブキャップにおいて、
前記リップ部に、リップ部の他の部分よりも肉厚に形成され、前記検出部の挿入時に検出部側面の凹部と係合する厚肉部を設けたことを特徴とするハブキャップ。 The hub cap according to claim 1 or 2,
A hub cap characterized in that the lip portion is provided with a thicker portion that is formed thicker than other portions of the lip portion and engages with a concave portion on a side surface of the detection portion when the detection portion is inserted. 請求項１ないし請求項３のいずれか１項に記載のハブキャップにおいて、
前記リップ部は、前記挿通口の軸直交方向に対し、前記検出部の挿入方向に向かって角度を有することを特徴とするハブキャップ。 The hub cap according to any one of claims 1 to 3,
The hub cap according to claim 1, wherein the lip portion has an angle toward an insertion direction of the detection portion with respect to a direction orthogonal to the axis of the insertion port. 請求項１ないし請求項４のいずれか１項に記載のハブキャップにおいて、
前記リップ部は、少なくとも四隅に切り欠き部を有することを特徴とするハブキャップ。 The hub cap according to any one of claims 1 to 4, wherein:
The lip portion has a cutout portion at least at four corners. アクスルハウジングの軸孔の開口部を覆うハブキャップの挿通口に車輪速センサの検出部を挿入し、前記車輪速センサの固定部を前記アクスルハウジングに固定する車輪速センサ取り付け構造において、
前記ハブキャップとして、請求項１ないし請求項５のいずれか１項に記載のハブキャップを用いたことを特徴とする車輪速センサ取り付け構造。 In the wheel speed sensor mounting structure for inserting the detection portion of the wheel speed sensor into the insertion port of the hub cap that covers the opening of the axle hole of the axle housing, and fixing the fixing portion of the wheel speed sensor to the axle housing,
A wheel speed sensor mounting structure using the hub cap according to any one of claims 1 to 5 as the hub cap. アクスルハウジングの軸孔の開口部を覆うハブキャップの挿通口に車輪速センサの検出部を挿入し、前記車輪速センサの固定部を前記アクスルハウジングに固定する車輪速センサ取り付け方法において、
前記挿通口の内周縁に、前記検出部の外形よりも小さな開口を有するリップ部を設けておき、前記検出部の先端で前記リップ部を弾性変形させつつ、前記検出部を前記挿通口に挿入することを特徴とする車輪速センサ取り付け方法。 In the wheel speed sensor mounting method for inserting the detection portion of the wheel speed sensor into the insertion port of the hub cap that covers the opening of the axle hole of the axle housing, and fixing the fixing portion of the wheel speed sensor to the axle housing,
A lip portion having an opening smaller than the outer shape of the detection portion is provided on the inner periphery of the insertion port, and the detection portion is inserted into the insertion port while elastically deforming the lip portion at the tip of the detection portion. A method for attaching a wheel speed sensor.
JP2007265972A 2007-10-12 2007-10-12 Hubcap, wheel speed sensor mounting structure, and wheel speed sensor mounting method Pending JP2009090937A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011149836A (en) * 2010-01-22 2011-08-04 Ntn Corp Bearing device for wheel with rotational speed detection device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011149836A (en) * 2010-01-22 2011-08-04 Ntn Corp Bearing device for wheel with rotational speed detection device

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