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JP2005140146A - Hub unit for driving wheel - Google Patents

Hub unit for driving wheel Download PDF

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Publication number
JP2005140146A
JP2005140146A JP2003373958A JP2003373958A JP2005140146A JP 2005140146 A JP2005140146 A JP 2005140146A JP 2003373958 A JP2003373958 A JP 2003373958A JP 2003373958 A JP2003373958 A JP 2003373958A JP 2005140146 A JP2005140146 A JP 2005140146A
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Japan
Prior art keywords
encoder
hub unit
sensor
peripheral surface
cover
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Pending
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JP2003373958A
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Japanese (ja)
Inventor
Takeo Okuma
健夫 大熊
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NSK Ltd
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NSK Ltd
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Priority to JP2003373958A priority Critical patent/JP2005140146A/en
Publication of JP2005140146A publication Critical patent/JP2005140146A/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
    • 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
    • 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
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7886—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted outside the gap between the inner and outer races, e.g. sealing rings mounted to an end face or outer surface of a race
    • 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
    • F16C19/187—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 all four raceways integrated on parts other than race rings, e.g. fourth 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To install a rotating speed detecting device in a hub unit for a driving wheel known and described as the 4th generation hub unit and to detect a rotating speed with reliability by the rotating speed detecting device. <P>SOLUTION: An encoder 17 is externally fitted and fixed to an outer peripheral face of an intermediate part of a driving shaft member 8a, and a sensor 18 is supported on a part of a cover 20 fixed to an inner end part of an outer ring 2a. In this condition, a detected part of the encoder 17 and a detecting part of the sensor 18 are faced to each other in a sealed space in which a plurality of rolling elements 4, 4 are mounted to constitute the rotating speed detecting device. By applying this constitution, problems can be solved. <P>COPYRIGHT: (C)2005,JPO&amp;NCIPI

Description

本発明に係る駆動輪用ハブユニットは、自動車の駆動輪（ＦＦ車の前輪、ＦＲ車及びＲＲ車の後輪、４ＷＤ車の全車輪）を懸架装置に対して回転自在に支持する為に利用する。   The hub unit for driving wheels according to the present invention is used to rotatably support driving wheels of automobiles (front wheels of FF vehicles, rear wheels of FR vehicles and RR vehicles, all wheels of 4WD vehicles) with respect to a suspension device. To do.

自動車の車輪は、車輪支持用ハブユニットにより懸架装置に対して回転自在に支持する。この様な車輪支持用ハブユニットのうち、駆動輪を支持する為の駆動輪用ハブユニットは、この駆動輪を支持固定する為のハブに対し、変速機からの回転力を伝達する部材である、等速ジョイント用外輪を結合した状態で使用する。図４は、この様な駆動輪用ハブユニットの従来構造の１例として、特許文献１に記載されたものを示している。この駆動輪用ハブユニット１は、上記等速ジョイント用外輪を構成部材に含めてユニット化した、所謂第四世代ハブユニットと呼ばれるものである。   The wheels of the automobile are rotatably supported with respect to the suspension device by a wheel support hub unit. Among such wheel support hub units, the drive wheel hub unit for supporting the drive wheels is a member that transmits the rotational force from the transmission to the hub for supporting and fixing the drive wheels. Used with the outer ring for constant velocity joints connected. FIG. 4 shows one described in Patent Document 1 as an example of the conventional structure of such a drive wheel hub unit. The drive wheel hub unit 1 is a so-called fourth generation hub unit in which the outer ring for the constant velocity joint is included as a component to form a unit.

この様な駆動輪用ハブユニット１は、外輪２と、内側部材３と、複数個の転動体４、４とを備える。このうちの外輪２は、内周面に第一、第二の外輪軌道５ａ、５ｂを、外周面に結合フランジ６を、それぞれ有するものである。又、上記内側部材３は、ハブ７と駆動軸部材８とを互いに結合して成る。このうちのハブ７は、全体を円筒状に造られて、外周面の外端寄り部分（軸方向に関して「外」とは、自動車への組み付け状態で車両の幅方向外側を言い、全図の左側。反対に、自動車への組み付け状態で車両の幅方向中央側となる全図の右側を、軸方向に関して「内」と言う。本明細書及び特許請求の範囲の全体で同じ。）に車輪を支持する為の取付フランジ９を、同じく内端寄り部分に第一の内輪軌道１０ａを、それぞれ有すると共に、内周面の外半部に凹凸面部１１を設けている。この凹凸面部１１は、上記内周面の外半部に、例えば螺旋溝加工、ローレット加工、セレーション溝加工等を施す事により形成している。又、この凹凸面部１１には、高周波焼き入れ等の硬化処理を施している。   Such a drive wheel hub unit 1 includes an outer ring 2, an inner member 3, and a plurality of rolling elements 4 and 4. Of these, the outer ring 2 has first and second outer ring raceways 5a and 5b on the inner peripheral surface, and a coupling flange 6 on the outer peripheral surface. The inner member 3 is formed by coupling a hub 7 and a drive shaft member 8 to each other. Of these, the hub 7 is formed in a cylindrical shape as a whole, and is a portion near the outer end of the outer peripheral surface (“outside” with respect to the axial direction means the outside in the width direction of the vehicle in the assembled state in the automobile, On the other hand, the right side of all the drawings, which is the center side in the width direction of the vehicle in the assembled state in the automobile, is referred to as “inside” with respect to the axial direction, and is the same throughout the present specification and claims. Are provided with a first inner ring raceway 10a on the inner end portion, and an uneven surface portion 11 is provided on the outer half of the inner peripheral surface. The concavo-convex surface portion 11 is formed by performing, for example, spiral grooving, knurling, serration grooving, etc. on the outer half of the inner peripheral surface. The uneven surface portion 11 is subjected to a hardening process such as induction hardening.

又、上記駆動軸部材８は、外端部に中空の軸部１２を、内端部に等速ジョイント用外輪１３を、それぞれ有すると共に、中間部外周面に第二の内輪軌道１０ｂを形成している。そして、上記軸部１２を上記ハブ７の内側に、このハブ７の内端側から挿入する事により、このハブ７の内端面を上記軸部１２の基端部に設けた段差面１４に突き当てている。又、この状態で、上記軸部１２の先半部を治具で拡径する事により、この先半部の外周面を上記凹凸面部１１に食い込ませている。これにより、上記ハブ７と上記駆動軸部材８とを結合固定して、上記内側部材３を構成している。尚、上記凹凸面部１１は、上記ハブ７の内周面に代えて上記軸部１２の外周面に形成するか、或はこれらハブ７の内周面と軸部１２の外周面との双方に形成する場合もある。又、図示の例では、上記ハブ７に上記軸部１２を内嵌しているが、反対に、ハブの内端部を軸部に内嵌する構造も従来から知られている（前記特許文献１の図１９参照）。   The drive shaft member 8 has a hollow shaft portion 12 at the outer end portion, an outer ring 13 for constant velocity joints at the inner end portion, and a second inner ring raceway 10b on the outer peripheral surface of the intermediate portion. ing. Then, by inserting the shaft portion 12 into the hub 7 from the inner end side of the hub 7, the inner end surface of the hub 7 is pushed against the stepped surface 14 provided at the base end portion of the shaft portion 12. I guess. Further, in this state, by expanding the diameter of the tip half of the shaft portion 12 with a jig, the outer peripheral surface of the tip half is bitten into the uneven surface portion 11. As a result, the hub 7 and the drive shaft member 8 are coupled and fixed to constitute the inner member 3. The uneven surface portion 11 is formed on the outer peripheral surface of the shaft portion 12 instead of the inner peripheral surface of the hub 7, or both the inner peripheral surface of the hub 7 and the outer peripheral surface of the shaft portion 12. Sometimes it forms. In the illustrated example, the shaft portion 12 is fitted into the hub 7. On the other hand, a structure in which the inner end portion of the hub is fitted into the shaft portion has been conventionally known (see Patent Document 1). 1 (see FIG. 19).

又、上記第一、第二の各外輪軌道５ａ、５ｂと上記第一、第二の各内輪軌道１０ａ、１０ｂとの間に上記各転動体４、４を、それぞれ保持器１５、１５により保持した状態で複数個ずつ、転動自在に設けている。更に、上記外輪２の内周面と上記内側部材３の外周面との間に設けられた、上記各転動体４、４を設置した空間の両端開口は、それぞれが密封装置であるシールリング１６ａ、１６ｂにより密閉している。尚、図示の例では、上記各転動体４、４として玉を使用しているが、重量の嵩む自動車用の駆動輪用ハブユニットの場合には、これら転動体としてテーパころを使用する場合もある。   The rolling elements 4 and 4 are held by cages 15 and 15 between the first and second outer ring raceways 5a and 5b and the first and second inner ring raceways 10a and 10b, respectively. In this state, a plurality of rolls are provided so as to be freely rollable. Furthermore, both ends of the space in which the rolling elements 4 and 4 are provided between the inner peripheral surface of the outer ring 2 and the outer peripheral surface of the inner member 3 are sealed rings 16a each serving as a sealing device. 16b. In the example shown in the drawing, balls are used as the rolling elements 4 and 4. However, in the case of a driving wheel hub unit for a heavy automobile, tapered rollers may be used as the rolling elements. is there.

上述の様に構成する駆動輪用ハブユニット１の使用時には、懸架装置を構成するナックルに上記外輪２を構成する結合フランジ６を結合固定すると共に、上記ハブ７を構成する取付フランジ９に車輪を支持固定する。更には、上記等速ジョイント用外輪１３の内側に、図示しないジョイント用内輪と複数個のボールと保持器とを組み付けて等速ジョイントを構成すると共に、上記等速ジョイント用内輪を、変速機からの回転力を伝達する駆動軸の先端部に結合する。   When the drive wheel hub unit 1 configured as described above is used, the coupling flange 6 constituting the outer ring 2 is coupled and fixed to the knuckle constituting the suspension device, and the wheel is mounted on the mounting flange 9 constituting the hub 7. Support and fix. Furthermore, a joint inner ring (not shown), a plurality of balls, and a cage are assembled inside the outer ring 13 for the constant velocity joint to form a constant velocity joint, and the inner ring for the constant velocity joint is connected to the transmission. It is coupled to the tip of the drive shaft that transmits the rotational force.

上述した様な駆動輪用ハブユニット１の場合には、上記等速ジョイント用外輪１３を構成部材に含めてユニット化している為、出荷時、搬送時、自動車への組み付け時等、各場面での取り扱い性を良好にできる。   In the case of the hub unit 1 for driving wheels as described above, the outer ring 13 for constant velocity joint is included as a unit to form a unit, so that it can be used in various situations such as shipping, transporting, and assembling to a car. Can be easily handled.

ところで、アンチロックブレーキシステム（ＡＢＳ）やトラクションコントロールシステム（ＴＣＳ）等の車両安定装置では、車両制御を行なう為の制御情報として、車輪の回転速度を利用する。この為、自動車には、この車輪の回転速度を検出する為の回転速度検出装置を搭載する。この場合に、従来から、例えば特許文献２〜３等に記載されている様に、上記回転検出装置を構成するエンコーダ及びセンサを、車輪支持用ハブユニットに組み付ける事が行なわれている。   By the way, in a vehicle stabilizer such as an antilock brake system (ABS) or a traction control system (TCS), the rotational speed of a wheel is used as control information for performing vehicle control. For this reason, the automobile is equipped with a rotational speed detection device for detecting the rotational speed of the wheels. In this case, conventionally, as described in, for example, Patent Documents 2 to 3 and the like, an encoder and a sensor constituting the rotation detection device are assembled to a wheel support hub unit.

ところが、従来、上述した様な第四世代ハブユニットと呼ばれる駆動輪用ハブユニット１に於いては、上記エンコーダ及びセンサを組み付けた構造が存在しない。この為、これらエンコーダ及びセンサを組み付けた構造を実現する事が望まれる。特に、この場合、信頼性の高い回転速度検出を行なえる構造を実現する事が望まれる。   However, conventionally, the drive wheel hub unit 1 called the fourth generation hub unit as described above does not have a structure in which the encoder and the sensor are assembled. For this reason, it is desired to realize a structure in which these encoders and sensors are assembled. In particular, in this case, it is desired to realize a structure capable of detecting the rotational speed with high reliability.

特開２００１−１８６０５号公報Japanese Patent Laid-Open No. 2001-18605 特開２０００−１１１５６６号公報JP 2000-1111566 A 特開２００２−３４０９２２号公報JP 2002-340922 A

本発明の駆動輪用ハブユニットは、上述の様な事情に鑑み、第四世代ハブユニットに回転速度検出装置を構成するエンコーダ及びセンサを組み付けた構造で、しかも信頼性の高い回転速度検出を行なえる構造（更には、小型に構成できる構造）を実現すべく発明したものである。   In view of the above-described circumstances, the drive wheel hub unit of the present invention has a structure in which an encoder and a sensor constituting a rotational speed detection device are assembled to a fourth generation hub unit, and can perform highly reliable rotational speed detection. The invention has been invented to realize a structure (and a structure that can be made compact).

本発明の駆動輪用ハブユニットは、所謂第四世代ハブユニットと呼ばれるもので、外輪と、内側部材と、複数個の転動体と、１対の密封装置とを備える。
このうちの外輪は、内周面に第一、第二の外輪軌道を有し、使用時に懸架装置に結合された状態で回転しない。
又、上記内側部材は、外周面に第一、第二の内輪軌道を有する。
又、上記各転動体は、上記第一、第二の各内輪軌道と上記第一、第二の各外輪軌道との間に、それぞれ複数個ずつ転動自在に設けられている。
又、上記１対の密封装置は、上記外輪の内周面と上記内側部材の外周面との間で上記各転動体を設置した空間の両端開口を密閉する。
更に、上記内側部材は、ハブと駆動軸部材とから成る。
このうちのハブは、全体を筒状に造られて、外周面の軸方向外端寄り部分に車輪を支持する為の取付フランジを、同じく軸方向内端寄り部分に上記第一の内輪軌道を、それぞれ有するものである。
又、上記駆動軸部材は、軸方向外端部に軸部を、軸方向内端部に等速ジョイント用外輪を、中間部外周面に上記第二の内輪軌道を、それぞれ有するものである。
そして、上記ハブと上記軸部とを互いに嵌合させると共に、これらハブと軸部との嵌合面同士を凹凸係合させる事により、このハブと上記駆動軸部材とを結合している。 The hub unit for driving wheels of the present invention is a so-called fourth generation hub unit, and includes an outer ring, an inner member, a plurality of rolling elements, and a pair of sealing devices.
Of these, the outer ring has first and second outer ring raceways on the inner peripheral surface, and does not rotate in a state where it is coupled to the suspension device during use.
The inner member has first and second inner ring raceways on the outer peripheral surface.
Each of the rolling elements is provided in a freely rotatable manner between the first and second inner ring raceways and the first and second outer ring raceways.
Further, the pair of sealing devices seals both end openings of the space where the rolling elements are installed between the inner peripheral surface of the outer ring and the outer peripheral surface of the inner member.
Further, the inner member includes a hub and a drive shaft member.
Of these, the hub is entirely formed in a cylindrical shape, and has a mounting flange for supporting the wheel on the outer peripheral surface near the axial outer end, and the first inner ring raceway on the axial inner end. , Respectively.
The drive shaft member has a shaft portion at the outer end portion in the axial direction, an outer ring for constant velocity joints at the inner end portion in the axial direction, and the second inner ring raceway on the outer peripheral surface of the intermediate portion.
Then, the hub and the shaft portion are fitted to each other, and the hub and the drive shaft member are coupled to each other by engaging the fitting surfaces of the hub and the shaft portion with irregularities.

特に、本発明の駆動輪用ハブユニットに於いては、上記内側部材の一部で上記１対の密封装置同士の間部分にエンコーダを外嵌固定すると共に、上記外輪の一部にセンサを、このセンサの検出部を上記エンコーダの被検出部に対向させた状態で支持している。そして、これらエンコーダとセンサとにより、回転速度検出装置を構成している。   In particular, in the drive wheel hub unit of the present invention, an encoder is fitted and fixed to a portion between the pair of sealing devices by a part of the inner member, and a sensor is provided to a part of the outer ring. The detection part of this sensor is supported in a state of being opposed to the detection part of the encoder. These encoders and sensors constitute a rotational speed detection device.

上述の様に、本発明の駆動輪用ハブユニットの場合には、回転速度検出装置を構成するエンコーダ及びセンサを備えた第四世代ハブユニットを実現できる。又、本発明の場合には、これらエンコーダの被検出部とセンサの検出部とを、１対の密封装置同士の間部分（密封空間の内側）に設けている。この為、これら被検出部と検出部とに外部からの異物（塵芥や雨水等）が付着するのを防止でき、信頼性の高い回転速度検出を行なえる。   As described above, in the case of the drive wheel hub unit of the present invention, a fourth generation hub unit including an encoder and a sensor constituting a rotational speed detection device can be realized. In the case of the present invention, the detected portion of the encoder and the detecting portion of the sensor are provided between the pair of sealing devices (inside the sealed space). For this reason, it is possible to prevent foreign matters (dust, rainwater, etc.) from adhering to the detected part and the detecting part, and to detect the rotational speed with high reliability.

本発明の駆動輪用ハブユニットを実施する場合に、好ましくは、１対の密封装置のうち、軸方向内側の密封装置として、基端部を外輪の軸方向内端部に嵌合固定した環状のカバーと、その基端部をこのカバーの先端部に全周に亙り固定すると共にその先端縁を駆動軸部材の表面に全周に亙り摺接させたシール材とから成るものを使用する。更には、エンコーダを、上記駆動軸部材の中間部外周面のうち第二の内輪軌道と上記シール材を摺接させた部分との間部分に外嵌固定する。これと共に、センサを、上記カバーを介して上記外輪に支持固定する。
この様な構造を採用すれば、上記エンコーダ及びセンサを備えた駆動輪用ハブユニットを小型に構成できる。即ち、この様な構造を採用した場合、上記カバー及びシール材並びに上記エンコーダ及びセンサの、少なくとも一部（好ましくは、大部分若しくは全部）は、上記外輪と上記駆動軸部材との間に存在する、凹み部分の内側に配置できる。従って、上記エンコーダ及びセンサを備えた駆動輪用ハブユニットを小型に構成できる。 When implementing the hub unit for driving wheels of the present invention, preferably, as a sealing device on the inner side in the axial direction of the pair of sealing devices, an annular shape in which the base end portion is fitted and fixed to the inner end portion in the axial direction of the outer ring And a seal member having a base end portion fixed to the entire front end of the cover over the entire circumference and a front end edge thereof slidably in contact with the surface of the drive shaft member. Further, the encoder is externally fitted and fixed to a portion between the second inner ring raceway and the portion where the seal material is slidably contacted on the outer peripheral surface of the intermediate portion of the drive shaft member. At the same time, the sensor is supported and fixed to the outer ring through the cover.
By adopting such a structure, the drive wheel hub unit including the encoder and the sensor can be made compact. That is, when such a structure is adopted, at least a part (preferably most or all) of the cover, the sealing material, the encoder, and the sensor exists between the outer ring and the drive shaft member. It can be placed inside the dent. Therefore, the drive wheel hub unit including the encoder and the sensor can be configured in a small size.

より好ましくは、上記エンコーダとして、被検出部を外周面に設けたラジアルタイプのもの（例えば円筒状のもの）を使用する。
この様な構造を採用すれば、上記エンコーダの外径寸法を小さくできると共に、上記センサの位置を、径方向内側に近づける事ができる。従って、これらエンコーダ及びセンサを備えた駆動輪用ハブユニットを、より小型に構成できる。 More preferably, as the encoder, a radial type (for example, a cylindrical one) having a detected portion on the outer peripheral surface is used.
If such a structure is employed, the outer diameter of the encoder can be reduced, and the position of the sensor can be brought closer to the inside in the radial direction. Therefore, the hub unit for driving wheels provided with these encoders and sensors can be configured more compactly.

更に好ましくは、上記エンコーダの外径寸法を、上記駆動軸部材の表面のうち上記シール材の先端縁を摺接させる部分の径寸法よりも小さくする（小さくできる様に各部の寸法を規制する）。
この様な構造を採用すれば、上記エンコーダの外径寸法を更に小さくできると共に、上記センサの位置を、径方向内側に更に近づける事ができる。従って、これらエンコーダ及びセンサを備えた駆動輪用ハブユニットを、更に小型に構成できる。 More preferably, the outer diameter size of the encoder is made smaller than the diameter size of the portion of the surface of the drive shaft member that is in sliding contact with the tip edge of the seal material (the size of each part is regulated so that it can be reduced). .
By adopting such a structure, the outer diameter of the encoder can be further reduced, and the position of the sensor can be made closer to the inside in the radial direction. Therefore, the hub unit for driving wheels provided with these encoders and sensors can be further reduced in size.

又、上記カバーの一部に、このカバーの一部を径方向に貫通する取付孔を設け、上記センサをこの取付孔の内側に、上記カバーの径方向外側から挿入した状態で支持する。
この様な構造を採用すれば、上記外輪に上記カバーを支持固定した状態で、このカバーに対し、上記センサの着脱作業を行なえる。即ち、このカバーの径方向外方には広い空間が存在するので、この広い空間を利用して上記センサの着脱作業を行なえる。従って、懸架装置に外輪を結合固定した状態で、上記カバー（特に、上記取付孔を形成した部分）の径方向外側に広い空間が存在する場合には、このカバーに上記センサを組み付ける作業は、上記懸架装置に上記外輪を結合固定する前だけでなく、結合固定した後にも行なえる。 In addition, a mounting hole that penetrates a part of the cover in a radial direction is provided in a part of the cover, and the sensor is supported in a state of being inserted from the radial outside of the cover into the mounting hole.
If such a structure is employed, the sensor can be attached to and detached from the cover while the cover is supported and fixed to the outer ring. That is, since a wide space exists outside the cover in the radial direction, the sensor can be attached and detached using this wide space. Therefore, in the state where the outer ring is coupled and fixed to the suspension device, when there is a wide space on the outside in the radial direction of the cover (particularly, the portion where the mounting hole is formed), the work of assembling the sensor to the cover is as follows: Not only before the outer ring is coupled and fixed to the suspension device, but also after the coupling and fixing.

図１〜２は、請求項１〜５に対応する、本発明の実施例を示している。尚、本実施例の特徴は、第四世代ハブユニットと呼ばれる駆動輪用ハブユニットに、回転速度検出装置を構成するエンコーダ１７及びセンサ１８を組み付けた点にある。その他の部分の構造及び作用は、前述の図４に示した従来構造とほぼ同様である為、重複する説明を省略若しくは簡略にし、以下、本実施例の特徴部分並びに上記従来構造と異なる部分を中心に説明する。   1 and 2 show an embodiment of the present invention corresponding to claims 1 to 5. The feature of this embodiment is that an encoder 17 and a sensor 18 constituting a rotational speed detecting device are assembled to a drive wheel hub unit called a fourth generation hub unit. Since the structure and operation of the other parts are almost the same as those of the conventional structure shown in FIG. 4 described above, the overlapping description will be omitted or simplified. Hereinafter, the characteristic parts of this embodiment and the parts different from the conventional structure will be described. The explanation is centered.

本実施例の場合、複数個の転動体４、４を設置した空間の内端開口を密閉する密封装置１９は、カバー２０とシール材２１とにより構成している。このうちのカバー２０は、ＳＰＣＣ等の鋼板にプレス加工を施す事により、断面クランク形で全体を円環状に構成している。即ち、上記カバー２０は、大径円筒部２２と、この大径円筒部２２の軸方向内端縁から径方向内方に直角に折れ曲がった大径円輪部２３と、この大径円輪部２３の径方向内端縁から軸方向内方に直角に折れ曲がった小径円筒部２４と、この小径円筒部２４の軸方向内端縁から径方向内方に直角に折れ曲がった小径円輪部２５とを備える。この様なカバー２０は、上記大径円筒部２２を外輪２ａの内端部外周面に設けた小径段部２６に締り嵌めで外嵌すると共に、上記大径円輪部２３を上記外輪２ａの内端面に当接させた状態で、この外輪２ａに支持固定している。   In the case of the present embodiment, the sealing device 19 that seals the inner end opening of the space in which the plurality of rolling elements 4 and 4 are installed includes a cover 20 and a sealing material 21. Of these, the cover 20 is formed in an annular shape with a crank-shaped cross section by pressing a steel plate such as SPCC. That is, the cover 20 includes a large-diameter cylindrical portion 22, a large-diameter annular portion 23 bent at a right angle inward in the radial direction from the axial inner end edge of the large-diameter cylindrical portion 22, and the large-diameter annular portion. A small-diameter cylindrical portion 24 bent at a right angle inward in the axial direction from the radial inner end edge of the small-diameter portion 23; and a small-diameter annular ring portion 25 bent at a right angle inward in the radial direction from the axial inner end edge of the small-diameter cylindrical portion 24; Is provided. Such a cover 20 externally fits the large-diameter cylindrical portion 22 to a small-diameter step portion 26 provided on the outer peripheral surface of the inner end of the outer ring 2a, and also attaches the large-diameter annular portion 23 to the outer ring 2a. The outer ring 2a is supported and fixed in contact with the inner end surface.

尚、この状態で、上記大径円筒部２２の外径ｄ22が、上記外輪２ａの外端寄り部外周面に設けた円筒状の嵌合面部２７の外径Ｄ27よりも小さく（ｄ22＜Ｄ27）なる様に、各部の寸法を規制している。これにより、懸架装置を構成する図示しないナックルを上記嵌合面部２７に外嵌する際、このナックルの内周縁部が上記大径円筒部２２と干渉しない様にしている。 In this state, the outer diameter d 22 of the large diameter cylindrical portion 22 is smaller than the outer diameter D 27 of the cylindrical fitting surface 27 provided on the outer end-sided outer peripheral surface of the outer ring 2a (d 22 <to D 27) made way, which regulates the dimensions of each part. Thereby, when a knuckle (not shown) constituting the suspension device is externally fitted to the fitting surface portion 27, the inner peripheral edge portion of the knuckle is prevented from interfering with the large-diameter cylindrical portion 22.

又、上記シール材２１は、ゴムにより全体を円環状に構成すると共に、上記小径円輪部２５の内周縁部に全周に亙り固定している。そして、上述の様に外輪２ａの内端部にカバー２０を支持固定した状態で、上記シール材２１を構成する複数本のシールリップ２８ａ、２８ｂ、２８ｃの先端縁を、それぞれ駆動軸部材８ａの外端寄り部外周面に形成した円筒面部２９及び段差面３０に全周に亙り摺接させている。これにより、上記複数個の転動体４、４を設置した空間の内端開口を密閉している。   Further, the sealing material 21 is formed in an annular shape with rubber, and is fixed to the inner peripheral edge of the small-diameter annular ring portion 25 over the entire circumference. In the state where the cover 20 is supported and fixed to the inner end portion of the outer ring 2a as described above, the leading edges of the plurality of seal lips 28a, 28b, 28c constituting the seal material 21 are respectively connected to the drive shaft member 8a. The cylindrical surface portion 29 and the step surface 30 formed on the outer peripheral surface near the outer end are in sliding contact with the entire periphery. Thereby, the inner end opening of the space in which the plurality of rolling elements 4 and 4 are installed is sealed.

又、上記駆動軸部材８ａの中間部外周面のうち、第二の内輪軌道１０ｂと上記円筒面部２９との間部分に、この円筒面部２９よりも小径の第二円筒面部３１を設けている。そして、この第二円筒面部３１に、円筒状のエンコーダ１７を外嵌固定している。このエンコーダ１７は、ゴム磁石製で、被検出部である外周面にそれぞれ複数個ずつのＳ極とＮ極とを、円周方向に関して交互に且つ等間隔に配置している。又、本実施例の場合、上述の様に第二円筒面部３１にエンコーダ１７を外嵌した状態で、このエンコーダ１７の外径ｄ17が上記円筒面部２９の外径Ｄ29よりも小さく（ｄ17＜Ｄ29）なる様に、各部の寸法を規制している。この様に本実施例の場合には、上記エンコーダ１７として、被検出部を外周面に設けた円筒状のもの（ラジアルタイプのもの）を使用すると共に、上述の様な寸法規制（ｄ17＜Ｄ29）を行なう事により、上記エンコーダ１７の外径寸法を十分に小さくしている。又、外輪２ａ内に駆動軸部材８ａを挿入する際に、上記エンコーダ１７が上記シール材２１の内周縁に引っ掛からない様にしている。 Further, a second cylindrical surface portion 31 having a smaller diameter than the cylindrical surface portion 29 is provided in a portion between the second inner ring raceway 10b and the cylindrical surface portion 29 in the outer peripheral surface of the intermediate portion of the drive shaft member 8a. A cylindrical encoder 17 is externally fixed to the second cylindrical surface portion 31. The encoder 17 is made of a rubber magnet, and a plurality of S poles and N poles are alternately arranged at equal intervals in the circumferential direction on the outer peripheral surface which is a detected portion. In the case of the present embodiment, the outer diameter d 17 of the encoder 17 is smaller than the outer diameter D 29 of the cylindrical surface portion 29 in the state where the encoder 17 is externally fitted to the second cylindrical surface portion 31 as described above (d 17 <D 29 ) The dimensions of each part are regulated. As described above, in the case of the present embodiment, as the encoder 17, a cylindrical one (radial type) having a detected portion provided on the outer peripheral surface is used, and the dimensional restriction (d 17 < By performing D 29 ), the outer diameter of the encoder 17 is made sufficiently small. Further, when the drive shaft member 8a is inserted into the outer ring 2a, the encoder 17 is prevented from being caught by the inner peripheral edge of the seal material 21.

一方、本実施例の場合、上記カバー２０の一部には、センサ１８を支持している。この為に、このカバー２０を構成する小径円筒部２４の円周方向一部分に、このカバー２０の中心軸に平行な平板部３２を形成している。これと共に、この平板部３２の一部に、この平板部３２を径方向に貫通する状態で取付孔３３を形成している。又、上記センサ１８は、それぞれが合成樹脂により造られた、杆状の挿入部３４と、この挿入部３４の基端部に設けられた取付フランジ部３５とを有する。そして、このうちの挿入部３４の先端部（図１〜２の下端部）に図示しない検出用部品を包埋する事により、この挿入部３４の先端部を検出部としている。又、この様なセンサの基端面８（図１〜２の上端面）からは、十分な可撓性を有するハーネス３６を引き出している。   On the other hand, in the present embodiment, the sensor 18 is supported on a part of the cover 20. For this purpose, a flat plate portion 32 that is parallel to the central axis of the cover 20 is formed in a part in the circumferential direction of the small-diameter cylindrical portion 24 constituting the cover 20. At the same time, a mounting hole 33 is formed in a part of the flat plate portion 32 so as to penetrate the flat plate portion 32 in the radial direction. The sensor 18 has a bowl-shaped insertion portion 34 each made of a synthetic resin, and a mounting flange portion 35 provided at the proximal end portion of the insertion portion 34. Then, by embedding a detection component (not shown) in the distal end portion (lower end portion in FIGS. 1 and 2) of the insertion portion 34, the distal end portion of the insertion portion 34 is used as a detection portion. Further, a harness 36 having sufficient flexibility is drawn out from the base end face 8 (the upper end face in FIGS. 1 and 2) of such a sensor.

上述の様なセンサ１８は、上記カバー２０の径方向外側から上記挿入部３４を、上記取付孔３３を通じてこのカバー２０の内側に挿入すると共に、上記取付フランジ部３５の側面を上記平板部３２の外面（図１〜２の上面）に当接（密接）させている。そして、この状態で、上記取付フランジ部３５を上記平板部３２に、ねじ等の結合手段を使用して固定する事により、上記センサ１８を上記カバー２０の一部に支持固定している。又、この様に支持固定した状態で、上記挿入部３４の先端部（検出部）を上記エンコーダ１７の外周面（被検出部）に、径方向に関する微小隙間を介して対向させる事により、回転速度検出装置を構成している。尚、この様なエンコーダ１７とセンサ１８とを組み合わせて構成した回転速度検出装置の作用に就いては、例えば、前記特許文献２、３等にも記載されている様に、従来から周知である為、説明を省略する。   The sensor 18 as described above inserts the insertion portion 34 from the outside in the radial direction of the cover 20 into the cover 20 through the attachment hole 33, and the side surface of the attachment flange portion 35 of the flat plate portion 32. It abuts (closely contacts) the outer surface (the upper surface of FIGS. 1 and 2). In this state, the sensor 18 is supported and fixed to a part of the cover 20 by fixing the mounting flange portion 35 to the flat plate portion 32 using a coupling means such as a screw. Further, in a state of being supported and fixed in this manner, the distal end portion (detection portion) of the insertion portion 34 is opposed to the outer peripheral surface (detection portion) of the encoder 17 via a minute gap in the radial direction. It constitutes a speed detection device. The operation of the rotational speed detection device configured by combining such an encoder 17 and sensor 18 has been conventionally known as described in, for example, Patent Documents 2 and 3 above. Therefore, explanation is omitted.

又、本実施例の場合には、上述の様にカバー２０の一部にセンサ１８を支持固定した状態で、このセンサ１８の基端面（図１〜２の上端面）並びに上記ハーネスの基端部をこのセンサ１８の基端面に接触させた状態でのこのハーネスの基端部（図２に鎖線で図示）が、上記外輪２ａの外端寄り部外周面に設けた嵌合面部２７よりも径方向外方に突出しない様に、各部の寸法を規制している。   In the case of the present embodiment, the sensor 18 is supported and fixed to a part of the cover 20 as described above, and the base end surface of the sensor 18 (the upper end surface in FIGS. 1 and 2) and the base end of the harness The base end portion (shown by a chain line in FIG. 2) of the harness in a state where the portion is in contact with the base end surface of the sensor 18 is more than the fitting surface portion 27 provided on the outer peripheral surface of the outer ring 2a. The dimensions of each part are regulated so as not to protrude outward in the radial direction.

又、本実施例の場合には、前述の様にしてエンコーダ１７の外径寸法を十分に小さくする事に伴い、このエンコーダ１７の外周面に対向させる上記センサ１８の位置を、このエンコーダ１７の中心軸に近づけている。これと共に、このセンサ１８を支持する上記カバー２０の外径寸法を十分に小さくしている。これにより、本実施例の場合には、上記エンコーダ１７及びセンサ１８並びに上記カバー２０を含んで構成する密封装置１９の大部分を、上記外輪２ａと前記駆動軸部材８ａとの間部分に存在する、径方向外方に開口する凹み部分の内側に配置している。   In the case of the present embodiment, as the outer diameter of the encoder 17 is sufficiently reduced as described above, the position of the sensor 18 facing the outer peripheral surface of the encoder 17 is changed. It is close to the central axis. At the same time, the outer diameter of the cover 20 that supports the sensor 18 is made sufficiently small. Thereby, in the case of the present embodiment, most of the sealing device 19 including the encoder 17, the sensor 18, and the cover 20 is present between the outer ring 2a and the drive shaft member 8a. It is arranged inside the recessed portion that opens radially outward.

上述の様に構成する本実施例の駆動輪用ハブユニットは、例えば、次の様にして組み立てる。先ず、外輪２ａの内周面に設けた第一、第二の外輪軌道５ａ、５ｂの径方向内側に、それぞれ保持器１５、１５により保持した複数個ずつの転動体４、４を配置する。次いで、上記外輪２ａの外端部にシールリング１６ａを、同じく内端部に密封装置１９を、それぞれ組み付ける。次いで、取付フランジ９にスタッド３７を圧入固定したハブ７と、第二円筒面部３１にエンコーダ１７を外嵌固定した駆動軸部材８ａの軸部１２とを、上記外輪２ａの内側で嵌合させる。次いで、この軸部１２の先半部を拡径治具により拡径する事に基づき、この軸部１２の先半部外周面を上記ハブ７の外半部内周面に設けた凹凸面部１１に食い込ませる。そして、最後に、上記密封装置１９を構成するカバー２０にセンサ１８を組み付ける。   The drive wheel hub unit of the present embodiment configured as described above is assembled, for example, as follows. First, a plurality of rolling elements 4 and 4 held by the cages 15 and 15 are arranged on the radially inner sides of the first and second outer ring raceways 5a and 5b provided on the inner peripheral surface of the outer ring 2a. Next, the seal ring 16a is assembled to the outer end of the outer ring 2a, and the sealing device 19 is assembled to the inner end. Next, the hub 7 in which the stud 37 is press-fitted and fixed to the mounting flange 9 and the shaft portion 12 of the drive shaft member 8a in which the encoder 17 is externally fixed to the second cylindrical surface portion 31 are fitted inside the outer ring 2a. Next, based on the diameter of the tip half of the shaft portion 12 being increased by a diameter expanding jig, the outer peripheral surface of the tip half of the shaft portion 12 is formed on the uneven surface portion 11 provided on the inner peripheral surface of the outer half of the hub 7. Encroach on. Finally, the sensor 18 is assembled to the cover 20 constituting the sealing device 19.

上述の様に、本実施例の駆動輪用ハブユニットの場合には、回転速度検出装置を構成するエンコーダ１７及びセンサ１８を備えた第四世代ハブユニットを実現できる。又、本実施例の場合には、これらエンコーダ１７の被検出部とセンサ１８の検出部とを、複数個の転動体４、４を設置した密封空間の内側に設けている。この為、これら被検出部と検出部とに外部からの異物（塵芥や雨水等）が付着するのを防止でき、信頼性の高い回転速度検出を行なえる。又、本実施例の場合には、上記エンコーダ１７及びセンサ１８並びに密封装置１９の大部分を、上記外輪２ａと上記駆動軸部材８ａとの間部分に存在する、径方向外方に開口する凹み部分の内側に配置している。この為、上記エンコーダ１７及びセンサ１８を備えた駆動輪用ハブユニットを小型に構成できる。   As described above, in the case of the drive wheel hub unit of the present embodiment, a fourth generation hub unit including the encoder 17 and the sensor 18 constituting the rotational speed detection device can be realized. In the case of the present embodiment, the detected portion of the encoder 17 and the detecting portion of the sensor 18 are provided inside a sealed space where a plurality of rolling elements 4 and 4 are installed. For this reason, it is possible to prevent foreign matters (dust, rainwater, etc.) from adhering to the detected part and the detecting part, and to detect the rotational speed with high reliability. In the case of the present embodiment, most of the encoder 17, the sensor 18, and the sealing device 19 are dents that exist in the portion between the outer ring 2a and the drive shaft member 8a and open radially outward. Arranged inside the part. For this reason, the hub unit for driving wheels provided with the encoder 17 and the sensor 18 can be configured in a small size.

又、本実施例の場合には、上記外輪２ａに上記カバー２０を支持固定した状態で、このカバー２０に対し、上記センサ１８の着脱作業を行なえる。即ち、このカバー２０の径方向外方には広い空間が存在するので、この広い空間を利用して上記センサ１８の着脱作業を行なえる。   In the case of this embodiment, the sensor 18 can be attached to and detached from the cover 20 with the cover 20 supported and fixed to the outer ring 2a. That is, since a large space exists outside the cover 20 in the radial direction, the sensor 18 can be attached and detached using this wide space.

特に、本実施例の場合には、上記カバー２０に上記センサ１８を組み付ける作業を、懸架装置を構成するナックルに上記外輪２ａを結合する前に行なえる。即ち、このナックルにこの外輪２ａを結合する際には、このナックルの中心孔に駆動輪用ハブユニットを、この駆動輪用ハブユニットの内端側から挿入する。これにより、上記外輪２ａの内端寄り部外周面に設けた嵌合面部２７に上記ナックルを、大きながたつきなく外嵌する。従って、この際、上記カバー２０に組み付けた上記センサ１８の基端部及びこのセンサ１８の基端面から引き出したハーネス３６の基端部が、上記嵌合面部２７よりも径方向外方に突出していると、これらセンサ１８及びハーネス３６の基端部が上記ナックルの内周縁部と干渉して、上記挿入作業を行なえなくなる。これに対し、本実施例の場合には、上記カバー２０に組み付けた上記センサ１８の基端部と、このセンサ１８の基端面に接触させた上記ハーネス３６の基端部とが、それぞれ上記嵌合面部２７よりも径方向外方に突出しない構造としている。この為、上記挿入作業を行なう際に、上記センサ１８及びハーネス３６の基端部が上記ナックルの内周縁部と干渉する事を防止できる。従って、上記カバー２０に上記センサ１８を組み付ける作業を、上記ナックルに上記外輪２ａを結合する前に行なえる。この結果、本実施例の場合には、駆動輪用ハブユニットの全部品を組み立てた状態で、この駆動輪用ハブユニットを自動車メーカーや自動車組立メーカー等に出荷（納入）できる。   In particular, in the case of the present embodiment, the operation of assembling the sensor 18 to the cover 20 can be performed before the outer ring 2a is coupled to the knuckle constituting the suspension device. That is, when the outer ring 2a is coupled to the knuckle, the driving wheel hub unit is inserted into the center hole of the knuckle from the inner end side of the driving wheel hub unit. As a result, the knuckle is externally fitted on the fitting surface portion 27 provided on the outer peripheral surface near the inner end of the outer ring 2a without large backlash. Accordingly, at this time, the base end portion of the sensor 18 assembled to the cover 20 and the base end portion of the harness 36 pulled out from the base end surface of the sensor 18 protrude outward in the radial direction from the fitting surface portion 27. If so, the proximal end portions of the sensor 18 and the harness 36 interfere with the inner peripheral edge portion of the knuckle, and the insertion operation cannot be performed. On the other hand, in this embodiment, the base end of the sensor 18 assembled to the cover 20 and the base end of the harness 36 in contact with the base end surface of the sensor 18 are respectively fitted with the fitting. The structure does not protrude outward in the radial direction from the mating surface portion 27. For this reason, when performing the said insertion operation | work, it can prevent that the base end part of the said sensor 18 and the harness 36 interferes with the inner peripheral part of the said knuckle. Therefore, the operation of assembling the sensor 18 to the cover 20 can be performed before the outer ring 2a is coupled to the knuckle. As a result, in the case of the present embodiment, the drive wheel hub unit can be shipped (delivered) to an automobile manufacturer, an automobile assembly manufacturer or the like in a state where all the parts of the drive wheel hub unit are assembled.

尚、本発明を実施する場合には、カバー２０に組み付けたセンサ１８の基端部及びこのセンサ１８の基端面から引き出したハーネス３６の基端部を、外輪２ａの嵌合面部２７よりも径方向外方に突出させる構造を採用する事もできる。但し、この場合には、上記カバー２０に上記センサ１８を組み付ける作業を、上記ナックルに上記外輪２ａを結合した後に行なう必要がある。従って、この場合、駆動輪用ハブユニットは、上記カバー２０に上記センサ１８を組み付ける前の状態で、自動車メーカーや自動車組立メーカーに出荷（納入）する事となる。尚、この様にして出荷・納入（搬送）を行なう際には、上記カバー２０に設けた取付孔３３を通じてこのカバー２０の内側に塵芥等の異物が進入するのを防止すべく、上記取付孔３３をキャップ等により塞いでおくのが好ましい。   When the present invention is carried out, the base end portion of the sensor 18 assembled to the cover 20 and the base end portion of the harness 36 pulled out from the base end surface of the sensor 18 have a diameter larger than that of the fitting surface portion 27 of the outer ring 2a. A structure that protrudes outward in the direction can also be adopted. However, in this case, the operation of assembling the sensor 18 to the cover 20 needs to be performed after the outer ring 2a is coupled to the knuckle. Therefore, in this case, the drive wheel hub unit is shipped (delivered) to an automobile manufacturer or an automobile assembly manufacturer before the sensor 18 is assembled to the cover 20. When shipping / delivering (conveying) in this manner, the mounting holes are provided in order to prevent foreign matter such as dust from entering the inside of the cover 20 through the mounting holes 33 provided in the cover 20. It is preferable to close 33 with a cap or the like.

又、本発明を実施する場合に、好ましくは、図３に示す様に、密封装置１９ａを構成するカバー２０ａに設ける取付孔３３の周縁部に、バーリング加工によって円筒部３８を形成する。そして、この円筒部３８の内周面と、センサ１８を構成する挿入部３４の外周面に全周に亙り形成した係止溝３９の底面との間で、Ｏリング４０を圧縮する。これにより、上記円筒部３８の内周面と上記挿入部３４の外周面との間の密封性を高める。   Further, when the present invention is implemented, preferably, as shown in FIG. 3, a cylindrical portion 38 is formed by burring at the peripheral portion of the mounting hole 33 provided in the cover 20a constituting the sealing device 19a. Then, the O-ring 40 is compressed between the inner peripheral surface of the cylindrical portion 38 and the bottom surface of the locking groove 39 formed over the entire outer periphery of the insertion portion 34 constituting the sensor 18. Thereby, the sealing performance between the inner peripheral surface of the cylindrical portion 38 and the outer peripheral surface of the insertion portion 34 is improved.

本発明の実施例１を示す断面図。Sectional drawing which shows Example 1 of this invention. 図１のＡ部拡大図。The A section enlarged view of FIG. カバー及びセンサの構造の別例を示す断面図。Sectional drawing which shows another example of the structure of a cover and a sensor. 従来構造の１例を示す断面図。Sectional drawing which shows an example of a conventional structure.

符号の説明Explanation of symbols

１ 駆動輪用ハブユニット
２、２ａ 外輪
３ 内側部材
４ 転動体
５ａ、５ｂ 外輪軌道
６ 結合フランジ
７ ハブ
８、８ａ 駆動軸部材
９ 取付フランジ
１０ａ、１０ｂ 内輪軌道
１１ 凹凸面部
１２ 軸部
１３ 等速ジョイント用外輪
１４ 段差面
１５ 保持器
１６ａ、１６ｂ シールリング
１７ エンコーダ
１８ センサ
１９、１９ａ 密封装置
２０、２０ａ カバー
２１ シール材
２２ 大径円筒部
２３ 大径円輪部
２４ 小径円筒部
２５ 小径円輪部
２６ 小径段部
２７ 嵌合面部
２８ａ、２８ｂ、２８ｃ シールリップ
２９ 円筒面部
３０ 段差面
３１ 第二円筒面部
３２ 平板部
３３ 挿入孔
３４ 挿入部
３５ 取付フランジ部
３６ ハーネス
３７ スタッド
３８ 円筒部
３９ 係止溝
４０ Ｏリング
DESCRIPTION OF SYMBOLS 1 Drive wheel hub unit 2, 2a Outer ring 3 Inner member 4 Rolling body 5a, 5b Outer ring raceway 6 Connection flange 7 Hub 8, 8a Drive shaft member 9 Mounting flange 10a, 10b Inner ring raceway 11 Concave surface part 12 Shaft part 13 Constant velocity joint Outer ring 14 Step surface 15 Cage 16a, 16b Seal ring 17 Encoder 18 Sensor 19, 19a Sealing device 20, 20a Cover 21 Sealing material 22 Large diameter cylindrical part 23 Large diameter circular ring part 24 Small diameter cylindrical part 25 Small diameter circular ring part 26 Small diameter step portion 27 Fitting surface portion 28a, 28b, 28c Seal lip 29 Cylindrical surface portion 30 Step surface 31 Second cylindrical surface portion 32 Flat plate portion 33 Insertion hole 34 Insertion portion 35 Mounting flange portion 36 Harness 37 Stud 38 Cylindrical portion 39 Locking groove 40 O-ring

Claims (5)

内周面に第一、第二の外輪軌道を有し、使用時に懸架装置に結合された状態で回転しない外輪と、外周面に第一、第二の内輪軌道を有する内側部材と、これら第一、第二の各内輪軌道と上記第一、第二の各外輪軌道との間にそれぞれ複数個ずつ転動自在に設けられた転動体と、上記外輪の内周面と上記内側部材の外周面との間でこれら各転動体を設置した空間の両端開口を密閉する１対の密封装置とを備え、このうちの内側部材は、ハブと駆動軸部材とから成り、このうちのハブは、全体を筒状に造られて、外周面の軸方向外端寄り部分に車輪を支持する為の取付フランジを、同じく軸方向内端寄り部分に上記第一の内輪軌道を、それぞれ有するものであり、上記駆動軸部材は、軸方向外端部に軸部を、軸方向内端部に等速ジョイント用外輪を、中間部外周面に上記第二の内輪軌道を、それぞれ有するものであり、上記ハブと上記軸部とを嵌合させると共にこれらハブと軸部との嵌合面同士を凹凸係合させる事により、このハブと上記駆動軸部材とを結合している駆動輪用ハブユニットに於いて、上記内側部材の一部で上記１対の密封装置同士の間部分にエンコーダを外嵌固定すると共に、上記外輪の一部にセンサを、このセンサの検出部を上記エンコーダの被検出部に対向させた状態で支持している事を特徴とする駆動輪用ハブユニット。   An outer ring having first and second outer ring raceways on the inner peripheral surface and not rotating in a state of being coupled to a suspension device in use; an inner member having first and second inner ring raceways on the outer peripheral surface; A plurality of rolling elements provided between the first and second inner ring raceways and the first and second outer ring raceways, respectively, and an outer peripheral surface of the inner ring and the inner member; A pair of sealing devices that seal the opening at both ends of the space in which each of the rolling elements is installed between the inner surface, and an inner member thereof includes a hub and a drive shaft member. The whole is made in a cylindrical shape, and has a mounting flange for supporting the wheel on the outer peripheral surface near the axial outer end, and the first inner ring raceway on the axial inner end portion. The drive shaft member has a shaft portion at the outer end portion in the axial direction and an outer ring for a constant velocity joint at the inner end portion in the axial direction. The second inner ring raceway is provided on the outer peripheral surface of the intermediate portion, and the hub and the shaft portion are fitted to each other, and the fitting surfaces of the hub and the shaft portion are unevenly engaged. In the drive wheel hub unit in which the hub and the drive shaft member are coupled, an encoder is fitted and fixed to a portion between the pair of sealing devices at a part of the inner member, A hub unit for a drive wheel, characterized in that a sensor is supported on a part of the outer ring in a state where the detection part of the sensor is opposed to the detected part of the encoder. １対の密封装置のうち、軸方向内側の密封装置は、基端部を外輪の軸方向内端部に嵌合固定した環状のカバーと、その基端部をこのカバーの先端部に全周に亙り固定すると共にその先端縁を駆動軸部材の表面に全周に亙り摺接させたシール材とから成り、エンコーダは、上記駆動軸部材の中間部外周面のうち第二の内輪軌道と上記シール材を摺接させた部分との間部分に外嵌固定されており、センサは、上記カバーを介して上記外輪に支持固定されている、請求項１に記載した駆動輪用ハブユニット。   Of the pair of sealing devices, the axially inner sealing device includes an annular cover whose base end is fitted and fixed to the inner end of the outer ring in the axial direction, and the base end of the entire periphery around the front end of the cover. And a seal member whose tip edge is slidably contacted with the entire surface of the drive shaft member, and the encoder includes the second inner ring raceway and the above-mentioned inner ring raceway on the outer peripheral surface of the intermediate portion of the drive shaft member. The drive wheel hub unit according to claim 1, wherein the drive wheel hub unit is fitted and fixed to a portion between the portion where the seal material is slidably contacted, and the sensor is supported and fixed to the outer ring via the cover. エンコーダとして、被検出部を外周面に設けたラジアルタイプのものを使用している、請求項１〜２の何れかに記載した駆動輪用ハブユニット。   The drive wheel hub unit according to any one of claims 1 to 2, wherein a radial type encoder having a detected portion provided on an outer peripheral surface is used as the encoder. エンコーダの外径寸法が、駆動軸部材の表面のうちシール材の先端縁を摺接させる部分の径寸法よりも小さい、請求項２〜３の何れかに記載した駆動輪用ハブユニット。   The drive wheel hub unit according to any one of claims 2 to 3, wherein an outer diameter dimension of the encoder is smaller than a diameter dimension of a portion of the surface of the drive shaft member that is in sliding contact with the leading edge of the sealing material. カバーの一部にこのカバーの一部を径方向に貫通する取付孔を設けており、センサをこの取付孔の内側に、上記カバーの径方向外側から挿入した状態で支持している、請求項２〜４の何れかに記載した駆動輪用ハブユニット。
An attachment hole that penetrates a part of the cover in a radial direction is provided in a part of the cover, and the sensor is supported inside the attachment hole in a state of being inserted from the outside in the radial direction of the cover. The hub unit for driving wheels described in any one of 2-4.
JP2003373958A 2003-11-04 2003-11-04 Hub unit for driving wheel Pending JP2005140146A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003373958A JP2005140146A (en) 2003-11-04 2003-11-04 Hub unit for driving wheel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003373958A JP2005140146A (en) 2003-11-04 2003-11-04 Hub unit for driving wheel

Publications (1)

Publication Number Publication Date
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ID=34685830

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Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007010480A (en) * 2005-06-30 2007-01-18 Ntn Corp Bearing apparatus for wheel with rotation speed detection device
WO2008010313A1 (en) 2006-07-18 2008-01-24 Ntn Corporation Bearing device for drive wheel
US8066337B2 (en) 2006-12-28 2011-11-29 Jtekt Corporation Wheel supporting system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007010480A (en) * 2005-06-30 2007-01-18 Ntn Corp Bearing apparatus for wheel with rotation speed detection device
WO2008010313A1 (en) 2006-07-18 2008-01-24 Ntn Corporation Bearing device for drive wheel
JP2008024051A (en) * 2006-07-18 2008-02-07 Ntn Corp Bearing device for driving wheel
US7686517B2 (en) 2006-07-18 2010-03-30 Ntn Corporation Wheel bearing apparatus for a driving wheel
US8066337B2 (en) 2006-12-28 2011-11-29 Jtekt Corporation Wheel supporting system

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