[go: up one dir, main page]

JP2008239024A - Hub unit for wheels - Google Patents

Hub unit for wheels Download PDF

Info

Publication number
JP2008239024A
JP2008239024A JP2007084355A JP2007084355A JP2008239024A JP 2008239024 A JP2008239024 A JP 2008239024A JP 2007084355 A JP2007084355 A JP 2007084355A JP 2007084355 A JP2007084355 A JP 2007084355A JP 2008239024 A JP2008239024 A JP 2008239024A
Authority
JP
Japan
Prior art keywords
oil passage
side member
fixed
hub unit
outer ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2007084355A
Other languages
Japanese (ja)
Inventor
Shunya Ishiyama
峻也 石山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JTEKT Corp
Original Assignee
JTEKT Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JTEKT Corp filed Critical JTEKT Corp
Priority to JP2007084355A priority Critical patent/JP2008239024A/en
Publication of JP2008239024A publication Critical patent/JP2008239024A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • F16C41/005—Fluid passages not relating to lubrication or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/001—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving
    • B60C23/003—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres
    • B60C23/00309—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres characterised by the location of the components, e.g. valves, sealings, conduits or sensors
    • B60C23/00318—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres characterised by the location of the components, e.g. valves, sealings, conduits or sensors on the wheels or the hubs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/001—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving
    • B60C23/003—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres
    • B60C23/00345—Details of the rotational joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/001—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving
    • B60C23/003—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres
    • B60C23/00363—Details of sealings
    • 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
    • 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

Landscapes

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

Abstract

【課題】タイヤの空気圧を調整するための機構を備え、該機構が車体側に加圧空気供給源を搭載する必要のない構成になっている車輪用ハブユニットを提供する。
【解決手段】ナックル１５に固定される外輪２と、外輪２に転動体６を介して回動可能に支持されかつ車輪１２が取付けられる回動側部材３とを有する車輪用ハブユニット１であって、外輪２を貫通する固定側オイル通路２ａと、外輪２と回動側部材３の間を密封してこれらの間に軸受内オイル通路１ａを形成する密封装置８と、回動側部材３に形成された回動側オイル通路４ｃ，５ｂとを有している。そして回動側部材３側には、固定側オイル通路２ａと軸受内オイル通路１ａと回動側オイル通路４ｃ，５ｂとを経て供給されたオイルの液圧を空気圧に変換してタイヤ１４側に供給する液圧空気圧変換器７ａが設けられている。
【選択図】図１A wheel hub unit is provided that includes a mechanism for adjusting the tire air pressure, and that does not require a pressurized air supply source to be mounted on the vehicle body side.
A wheel hub unit (1) having an outer ring (2) fixed to a knuckle (15) and a rotating side member (3) rotatably supported by the outer ring (2) via a rolling element (6) and a wheel (12) attached thereto. The fixed-side oil passage 2a that penetrates the outer ring 2, the sealing device 8 that seals between the outer ring 2 and the rotation-side member 3 and forms the bearing-inside oil passage 1a therebetween, and the rotation-side member 3 Rotating side oil passages 4c and 5b formed in the above. On the rotating member 3 side, the hydraulic pressure of oil supplied through the fixed oil passage 2a, the bearing oil passage 1a, and the rotating oil passages 4c and 5b is converted into air pressure to the tire 14 side. A hydraulic pressure / air pressure converter 7a to be supplied is provided.
[Selection] Figure 1

Description

本発明は、車輪用ハブユニットに関する。とりわけタイヤの空気圧を調整する装置の一部を構成する車輪用ハブユニットに関する。   The present invention relates to a wheel hub unit. More particularly, the present invention relates to a wheel hub unit that constitutes a part of a device for adjusting the tire air pressure.

従来、路面状況等に応じてタイヤの空気圧を調整するタイヤ空気圧調整装置が知られている（特許文献１参照）。この装置は、自動車に搭載された加圧空気供給源と、その加圧空気供給源とタイヤとを連通するエア流路とを有しており、エア流路は、ナックルと、ナックルに取付けられたハブユニットと、ハブユニットに取付けられた車輪とに形成されたエア通路を経てタイヤに連通している。   2. Description of the Related Art Conventionally, a tire air pressure adjusting device that adjusts the tire air pressure in accordance with road surface conditions or the like is known (see Patent Document 1). This device has a pressurized air supply source mounted on an automobile, and an air flow path that communicates the pressurized air supply source and the tire. The air flow path is attached to the knuckle and the knuckle. The tire unit communicates with the tire via an air passage formed in the hub unit and a wheel attached to the hub unit.

ハブユニットは、ナックルに固定される外輪と、外輪に転動体を介して回動可能に支持される内輪とを有している。外輪と内輪には、エア貫通路が形成されており、外輪と内輪の間には、これらの間を密封してエア通路を形成する密封装置が設けられている。したがって加圧空気供給源からの加圧空気が外輪と内輪を通ってタイヤに供給され得る構成になっている。しかし加圧空気供給源を車体側にわざわざ搭載しなければならないという問題等がある。
特開２０００−２５５２２８号公報 The hub unit has an outer ring that is fixed to the knuckle and an inner ring that is rotatably supported by the outer ring via a rolling element. An air through path is formed in the outer ring and the inner ring, and a sealing device is provided between the outer ring and the inner ring to form an air passage by sealing between the outer ring and the inner ring. Accordingly, the pressurized air from the pressurized air supply source can be supplied to the tire through the outer ring and the inner ring. However, there is a problem that a pressurized air supply source has to be mounted on the vehicle body side.
JP 2000-255228 A

そこで本発明は、タイヤの空気圧を調整するための機構を備え、該機構が車体側に加圧空気供給源を搭載する必要のない構成になっている車輪用ハブユニットを提供することを課題とする。   SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a wheel hub unit that includes a mechanism for adjusting the air pressure of a tire, and the mechanism does not require a pressurized air supply source to be mounted on the vehicle body side. To do.

前記課題を解決するために本発明は、各請求項に記載の通りの構成を備える車輪用ハブユニットであることを特徴とする。すなわち請求項１に記載の発明によると、車体側の部材に固定される固定側部材と、固定側部材に転動体を介して回動可能に支持されかつ車輪が取付けられる回動側部材とを有する車輪用ハブユニットであって、固定側部材を貫通する固定側オイル通路と、固定側部材と回動側部材の間を密封してこれらの間に軸受内オイル通路を形成する密封装置と、回動側部材に形成された回動側オイル通路とを有している。そして回動側部材側には、固定側オイル通路と軸受内オイル通路と回動側オイル通路とを経て供給されたオイルの液圧を空気圧に変換してタイヤ側に供給する液圧空気圧変換器が設けられている。   In order to solve the above-mentioned problems, the present invention is a hub unit for a wheel having a configuration as described in each claim. That is, according to the first aspect of the present invention, the fixed side member fixed to the member on the vehicle body side, and the rotating side member that is rotatably supported by the fixed side member via the rolling element and to which the wheel is attached. A wheel hub unit having a fixed-side oil passage penetrating the fixed-side member, a sealing device for sealing between the fixed-side member and the rotating-side member and forming an oil passage in the bearing therebetween, A rotation-side oil passage formed in the rotation-side member. And on the rotation side member side, the hydraulic pressure / air pressure converter for converting the hydraulic pressure of the oil supplied through the fixed side oil passage, the bearing oil passage, and the rotation side oil passage to air pressure and supplying it to the tire side Is provided.

ところで車体には、油圧装置の動力となる油圧を発生させる油圧発生装置が一般に搭載されている。そのため本発明は、車体に搭載された既存の油圧発生装置からの油圧を利用してタイヤの空気圧を調整し得る構成になっている。そして油圧発生装置の油圧を空気圧に変換する液圧空気圧変換器が回動側部材に設けられているために、車体側に加圧空気供給源等を搭載する必要がない構成になっている。   By the way, a hydraulic pressure generating device that generates hydraulic pressure that is the power of the hydraulic device is generally mounted on the vehicle body. Therefore, the present invention is configured to be able to adjust the tire air pressure using the hydraulic pressure from an existing hydraulic pressure generator mounted on the vehicle body. And since the hydraulic-pneumatic converter for converting the hydraulic pressure of the hydraulic pressure generator into the pneumatic pressure is provided on the rotating side member, there is no need to mount a pressurized air supply source or the like on the vehicle body side.

請求項２に記載の発明によると、一対の密封装置が、固定側部材と回動側部材の間に設けられる転動体の両側位置に設けられる。そして転動体が一対の密封装置によって形成される軸受内オイル通路内に配設されている。したがって本発明は、従来のハブユニットに比べて密封装置の数を減らし得る構成になっている。すなわち従来のハブユニットは、二列に配設された複数の転動体の列間に設けられる一対の密封装置と、転動体よりも外輪内輪の両端部位置に設けられる一対の密封装置とを有している（特許文献１参照）。一方、本発明は、二列の転動体の列間に設けられる一対の密封装置を必要としていない。また従来のハブユニットは、転動体等の潤滑剤としてグリースを注入する必要があった。しかし本発明では、そのグリースを必要とせず、軸受内オイル通路内のオイルを潤滑剤として利用する構成になっている。   According to invention of Claim 2, a pair of sealing device is provided in the both-sides position of the rolling element provided between a stationary-side member and a rotation side member. And the rolling element is arrange | positioned in the oil path in a bearing formed of a pair of sealing device. Therefore, the present invention is configured to reduce the number of sealing devices as compared with the conventional hub unit. That is, the conventional hub unit has a pair of sealing devices provided between rows of a plurality of rolling elements arranged in two rows, and a pair of sealing devices provided at both end positions of the inner ring of the outer ring rather than the rolling members. (See Patent Document 1). On the other hand, the present invention does not require a pair of sealing devices provided between two rows of rolling elements. Further, the conventional hub unit has to inject grease as a lubricant for rolling elements. However, in the present invention, the grease is not required, and the oil in the oil passage in the bearing is used as a lubricant.

（実施の形態１）
実施の形態１を図１，２にしたがって説明する。本形態の車輪用ハブユニット１は、図１に示すようにタイヤの空気圧を路面状況等に応じて調整するタイヤ空気圧調整装置１０の一部を構成している。タイヤ空気圧調整装置１０は、油圧発生装置１１と、油圧発生装置１１の油圧をハブユニット１内に伝達するオイル通路と、オイルの油圧を空気圧に変換する液圧空気圧変換器７ａと、液圧空気圧変換器７ａによって発生させた空気圧をタイヤ１４に伝達するエア通路とを有している。 (Embodiment 1)
The first embodiment will be described with reference to FIGS. The wheel hub unit 1 of this embodiment constitutes a part of a tire air pressure adjusting device 10 that adjusts the tire air pressure in accordance with the road surface condition and the like as shown in FIG. The tire pressure adjusting device 10 includes a hydraulic pressure generating device 11, an oil passage that transmits the hydraulic pressure of the hydraulic pressure generating device 11 into the hub unit 1, a hydraulic / pneumatic converter 7a that converts the hydraulic pressure of oil to air pressure, and a hydraulic / pneumatic pressure. And an air passage for transmitting the air pressure generated by the converter 7 a to the tire 14.

油圧発生装置１１は、オイルを圧縮して油圧を発生させる装置であって、車両に搭載されている。油圧発生装置１１は、図１に示すようにナックル（車体側の部材）１５を貫通するオイル通路１５ａにオイル配管を介して接続される。ナックル１５には、ハブユニット１が取付けられ、ナックル１５のオイル通路１５ａの一端が、ハブユニット１を貫通する固定側オイル通路２ａの一端と接続される。   The oil pressure generator 11 is an apparatus that generates oil pressure by compressing oil, and is mounted on a vehicle. As shown in FIG. 1, the hydraulic pressure generator 11 is connected to an oil passage 15 a that penetrates a knuckle (vehicle body side member) 15 via an oil pipe. The hub unit 1 is attached to the knuckle 15, and one end of the oil passage 15 a of the knuckle 15 is connected to one end of the fixed-side oil passage 2 a that penetrates the hub unit 1.

ハブユニット１は、図１に示すようにナックル１５に固定される固定側部材である外輪２と、外輪２に回動可能に支持される回動側部材３とを有している。外輪２は、図２に示すようにナックル１５に固定される取付フランジ２ｂと、外輪２を径方向に貫通する固定側オイル通路２ａを有している。   As shown in FIG. 1, the hub unit 1 includes an outer ring 2 that is a fixed side member fixed to the knuckle 15, and a rotating side member 3 that is rotatably supported by the outer ring 2. As shown in FIG. 2, the outer ring 2 has a mounting flange 2 b that is fixed to the knuckle 15 and a fixed-side oil passage 2 a that penetrates the outer ring 2 in the radial direction.

回動側部材３は、図１に示すように外輪２の内周側に転動体６を介して回動可能に取付けられる内輪４と、内輪４の内周面に取付けられるハブ輪５を有している。図２に示すように転動体６は、外輪２と内輪４の間に軸方向に二列になるように配列されており、各列の複数の転動体６が保持器９によって周方向に等間隔に保持されている。   As shown in FIG. 1, the rotating side member 3 has an inner ring 4 that is rotatably attached to the inner peripheral side of the outer ring 2 via a rolling element 6, and a hub ring 5 that is attached to the inner peripheral surface of the inner ring 4. is doing. As shown in FIG. 2, the rolling elements 6 are arranged in two rows in the axial direction between the outer ring 2 and the inner ring 4, and a plurality of rolling elements 6 in each row are arranged in the circumferential direction by a cage 9. Held at intervals.

外輪２と内輪４の間には、図２に示すようにこれらの間を密封する一対の密封装置８が設けられている。密封装置８は、環状であって、外周部が外輪２の両端部の内周面に嵌合固定され、内周部が内輪４の外周面に摺接する。一対の密封装置８は、二列の転動体６よりも外輪２の両端側に設けられており、外部から外輪２と内輪４の間に水等が侵入することを防止する。一対の密封装置８によって区画された区画部には、固定側オイル通路２ａの一端部が開口されている。そのため該区画部にオイルが満たされて、一対の密封装置８の間に軸受内オイル通路１ａが形成される。そして軸受内オイル通路１ａ内に位置する転動体６が、そのオイルによって潤滑される。   Between the outer ring | wheel 2 and the inner ring | wheel 4, a pair of sealing device 8 which seals between these is provided as shown in FIG. The sealing device 8 has an annular shape, and the outer peripheral portion is fitted and fixed to the inner peripheral surfaces of both end portions of the outer ring 2, and the inner peripheral portion is in sliding contact with the outer peripheral surface of the inner ring 4. The pair of sealing devices 8 are provided on both ends of the outer ring 2 with respect to the two rows of rolling elements 6, and prevent water and the like from entering between the outer ring 2 and the inner ring 4 from the outside. One end of the fixed-side oil passage 2a is opened in the partition section partitioned by the pair of sealing devices 8. Therefore, the partition portion is filled with oil, and a bearing oil passage 1 a is formed between the pair of sealing devices 8. And the rolling element 6 located in the bearing oil passage 1a is lubricated by the oil.

内輪４は、図２に示すように軸方向に隣り合う別体の分割内輪４ａ，４ｂを有している。分割内輪４ａ，４ｂの間には、オイル通路４ｃが形成されている。オイル通路４ｃは、内輪４を径方向に貫通しており、内輪４に一つまたは周方向に複数形成されている。内輪４の内周面には、ハブ輪５が取付けられており、内輪４のオイル通路４ｃと連通するオイル通路５ｂがハブ輪５に形成されている。したがってオイル通路４ｃとオイル通路５ｂによって回動側オイル通路が形成されている。   As shown in FIG. 2, the inner ring 4 has separate divided inner rings 4 a and 4 b that are adjacent in the axial direction. An oil passage 4c is formed between the divided inner rings 4a and 4b. The oil passage 4c penetrates the inner ring 4 in the radial direction, and is formed in the inner ring 4 or a plurality in the circumferential direction. A hub wheel 5 is attached to the inner peripheral surface of the inner ring 4, and an oil passage 5 b communicating with the oil passage 4 c of the inner ring 4 is formed in the hub wheel 5. Therefore, the rotation side oil passage is formed by the oil passage 4c and the oil passage 5b.

ハブ輪５の外周面には、図１に示すように車輪１２とブレーキロータ１３が取付けられるフランジ５ａが形成されている。ハブ輪５の軸中心に形成された孔５ｄには、車軸部材１６がスプライン嵌合によって取付けられる。したがってエンジンの回転力によって車軸部材１６が回転すると、ハブ輪５と内輪４と車輪１２が回転する。ハブ輪５の一端部には、変換ユニット７が取付けられている。変換ユニット７内には、オイルの液圧を空気圧に変換する液圧空気圧変換器７ａと、液圧空気圧変換器７ａとオイル通路５ｂとを接続するオイル配管７ｂと、液圧空気圧変換器７ａからの空気圧をタイヤ１４に伝達するためのエア配管７ｃが設けられている。   As shown in FIG. 1, a flange 5 a to which the wheel 12 and the brake rotor 13 are attached is formed on the outer peripheral surface of the hub wheel 5. An axle member 16 is attached to a hole 5d formed at the center of the hub wheel 5 by spline fitting. Therefore, when the axle member 16 is rotated by the rotational force of the engine, the hub wheel 5, the inner ring 4 and the wheel 12 are rotated. A conversion unit 7 is attached to one end of the hub wheel 5. In the conversion unit 7, there are a hydraulic / pneumatic converter 7a for converting the hydraulic pressure of oil into an air pressure, an oil pipe 7b for connecting the hydraulic / pneumatic converter 7a and the oil passage 5b, and a hydraulic / pneumatic converter 7a. An air pipe 7 c for transmitting the air pressure to the tire 14 is provided.

液圧空気圧変換器７ａは、例えば油圧シリンダを有しており、オイル配管７ｂからのオイルの液圧によってピストンが作動して、ピストンによってシリンダ内の空気を圧縮する。その空気圧は、エア配管７ｃから排出される。そしてエア配管７ｃと接続されたハブ輪５に形成されたエア通路５ｃと、車輪１２に形成されたエア通路１２ａとを経て、空気圧が車輪１２の外周面に取付けられたタイヤ１４に供給される。   The hydraulic / air pressure converter 7a has, for example, a hydraulic cylinder, and the piston is operated by the hydraulic pressure of the oil from the oil pipe 7b, and the air in the cylinder is compressed by the piston. The air pressure is discharged from the air pipe 7c. Then, the air pressure is supplied to the tire 14 attached to the outer peripheral surface of the wheel 12 through the air passage 5c formed in the hub wheel 5 connected to the air pipe 7c and the air passage 12a formed in the wheel 12. .

したがって油圧発生装置１１からのオイルの液圧は、図１に示すようにナックル１５と外輪２と回動側部材３とを経て液圧空気圧変換器７ａに供給される。そして液圧空気圧変換器７ａによってオイルの液圧が空気圧に変換され、その空気圧が回動側部材３と車輪１２とを経てタイヤ１４に供給される。これによりタイヤの空気圧が調整される。   Therefore, the hydraulic pressure of the oil from the hydraulic pressure generator 11 is supplied to the hydraulic / pneumatic converter 7a through the knuckle 15, the outer ring 2 and the rotating member 3 as shown in FIG. Then, the hydraulic pressure of the oil is converted into air pressure by the hydraulic pressure / air pressure converter 7 a, and the air pressure is supplied to the tire 14 through the rotating side member 3 and the wheel 12. Thereby, the tire air pressure is adjusted.

ところで車体には、油圧装置の動力となる油圧を発生させる油圧発生装置が一般に搭載されている。そのため本形態は、車体に搭載された既存の油圧発生装置１１からの油圧を利用してタイヤ１４の空気圧を調整し得る構成になっている。そして油圧発生装置１１の油圧を空気圧に変換する液圧空気圧変換器７ａが回動側部材２に設けられているために、車体側に加圧空気供給源等を搭載する必要がない構成になっている。   By the way, a hydraulic pressure generating device that generates hydraulic pressure that is the power of the hydraulic device is generally mounted on the vehicle body. Therefore, the present embodiment is configured such that the air pressure of the tire 14 can be adjusted using the hydraulic pressure from the existing hydraulic pressure generator 11 mounted on the vehicle body. And since the hydraulic-pneumatic converter 7a which converts the hydraulic pressure of the hydraulic pressure generator 11 into the pneumatic pressure is provided on the rotating side member 2, there is no need to mount a pressurized air supply source or the like on the vehicle body side. ing.

一対の密封装置８が、図２に示すように外輪（固定側部材）２と回動側部材３の間に設けられる転動体６の両側位置に設けられる。そして転動体６が一対の密封装置８によって形成される軸受内オイル通路１ａ内に配設されている。したがって本形態は、従来のハブユニットに比べて密封装置の数を減らし得る構成になっている。すなわち従来のハブユニットは、二列に配設された複数の転動体の列間に設けられる一対の密封装置と、転動体よりも外輪内輪の両端部位置に設けられる一対の密封装置を有している（特許文献１参照）。一方、本形態は、二列の転動体６の列間に設けられる一対の密封装置を必要としない。また従来のハブユニットは、転動体等の潤滑剤としてグリースを注入する構成であった。しかし本形態では、そのグリースを必要とせず、軸受内オイル通路１ａ内のオイルを潤滑剤として利用する構成になっている。   A pair of sealing devices 8 are provided at both side positions of the rolling element 6 provided between the outer ring (fixed side member) 2 and the rotating side member 3 as shown in FIG. A rolling element 6 is disposed in a bearing oil passage 1 a formed by a pair of sealing devices 8. Therefore, the present embodiment is configured such that the number of sealing devices can be reduced as compared with the conventional hub unit. That is, the conventional hub unit has a pair of sealing devices provided between rows of a plurality of rolling elements arranged in two rows, and a pair of sealing devices provided at both end positions of the inner ring of the outer ring rather than the rolling members. (See Patent Document 1). On the other hand, this form does not require a pair of sealing devices provided between the rows of the two rolling elements 6. Further, the conventional hub unit has a configuration in which grease is injected as a lubricant for a rolling element or the like. However, in this embodiment, the grease is not required and the oil in the bearing oil passage 1a is used as a lubricant.

（実施の形態２）
実施の形態２を図３にしたがって説明する。実施の形態２は、実施の形態１とほぼ同様に形成されている。しかし実施の形態２は、図２に示す一対の密封装置８に代えて、図３に示す二対の密封装置１８，１９を有している点で実施の形態１と相違している。以下、相違点を中心に実施の形態２について説明する。 (Embodiment 2)
A second embodiment will be described with reference to FIG. The second embodiment is formed in substantially the same manner as the first embodiment. However, the second embodiment is different from the first embodiment in that it has two pairs of sealing devices 18 and 19 shown in FIG. 3 instead of the pair of sealing devices 8 shown in FIG. Hereinafter, the second embodiment will be described focusing on the differences.

外輪２と内輪４の間には、図３に示すように二対の密封装置１８，１９が取付けられている。一対の密封装置１８は、外輪２の両側部、他の一対の密封装置１９は、外輪２の略中央部に取付けられている。密封装置１８，１９は、それぞれ外周部が外輪２の内周面に圧入嵌合され、内周部が内輪４に摺接し、外輪２と内輪４間を密封する。一対の密封装置１９は、二列に配設された転動体６の列間に設けられており、外輪２と内輪４の間に軸受内オイル通路１ｂを形成する。軸受内オイル通路１ｂは、外輪の固定側オイル通路２ａと内輪４のオイル通路４ｃに連通されている。   Between the outer ring 2 and the inner ring 4, two pairs of sealing devices 18 and 19 are attached as shown in FIG. The pair of sealing devices 18 are attached to both side portions of the outer ring 2, and the other pair of sealing devices 19 are attached to a substantially central portion of the outer ring 2. Each of the sealing devices 18 and 19 is press-fitted and fitted to the inner peripheral surface of the outer ring 2 at the outer peripheral part, and the inner peripheral part is in sliding contact with the inner ring 4 to seal between the outer ring 2 and the inner ring 4. The pair of sealing devices 19 are provided between the rows of rolling elements 6 arranged in two rows, and form an in-bearing oil passage 1 b between the outer ring 2 and the inner ring 4. The bearing internal oil passage 1 b is communicated with a fixed side oil passage 2 a of the outer ring and an oil passage 4 c of the inner ring 4.

密封装置１８，１９の間の区画部には、グリースが注入される。グリースは、転動体６と外輪２と内輪４の潤滑剤として利用される。密封装置１８は、外部から水等が外輪２と内輪４との間に侵入することを防止する。密封装置１９は、グリースが注入された区画部と、軸受内オイル通路１ｂを仕切って、グリースの汚れとオイルの汚れとが相互に行き来することを防止する。   Grease is injected into the partition between the sealing devices 18 and 19. The grease is used as a lubricant for the rolling elements 6, the outer ring 2, and the inner ring 4. The sealing device 18 prevents water or the like from entering between the outer ring 2 and the inner ring 4 from the outside. The sealing device 19 partitions the partition portion into which the grease is injected and the oil passage 1b in the bearing to prevent the grease and the oil from coming and going back and forth.

（他の実施の形態）
本発明は、実施の形態１，２に限定されず、以下の形態等であっても良い。
（１）例えば実施の形態１，２のハブユニット１は、図１に示すようにナックル１５に取付けられる固定側部材として外輪２を有し、車輪１２が取付けられる回動側部材３として内輪４とハブ輪５とを有していた。しかしナックルに取付けられる固定側部材として内輪を有し、車輪１２が取付けられる回動側部材として転動体を介して前記内輪に回動可能に支持される外輪を有している形態であっても良い。
（２）実施の形態１，２は、図１に示すように液圧空気圧変換器７ａとタイヤ１４とを接続するために、エア配管７ｃと、ハブ輪５のエア通路５ｃと、車輪１２のエア通路１２ａとを有していた。しかしこれらに代えて液圧空気圧変換器７ａとタイヤ１４の空気吸入口とを直接配管接続するエア配管を有している形態であっても良い。
（３）実施の形態１，２のハブユニット１は、駆動輪用であったが、従動輪用のハブユニットであっても良い。 (Other embodiments)
The present invention is not limited to the first and second embodiments, and may be the following forms.
(1) For example, the hub unit 1 of the first and second embodiments has an outer ring 2 as a fixed side member attached to the knuckle 15 as shown in FIG. 1, and an inner ring 4 as a rotating side member 3 to which the wheel 12 is attached. And a hub ring 5. However, even if the inner ring is provided as a fixed side member attached to the knuckle, and the outer ring is rotatably supported by the inner ring via a rolling element as a turning side member to which the wheel 12 is attached. good.
(2) In the first and second embodiments, as shown in FIG. 1, in order to connect the hydraulic / pneumatic converter 7a and the tire 14, the air pipe 7c, the air passage 5c of the hub wheel 5, and the wheels 12 And an air passage 12a. However, instead of these, a form having an air pipe that directly connects the hydraulic / pneumatic converter 7a and the air suction port of the tire 14 to the pipe may be employed.
(3) Although the hub unit 1 of the first and second embodiments is for driving wheels, it may be a hub unit for driven wheels.

タイヤ空気調整装置の断面図である。It is sectional drawing of a tire air conditioning apparatus. ハブユニットの一部断面拡大図である。It is a partial cross section enlarged view of a hub unit. 実施の形態２に係るハブユニットの一部断面拡大図である。6 is an enlarged partial cross-sectional view of a hub unit according to Embodiment 2. FIG.

符号の説明Explanation of symbols

１・・・車輪用ハブユニット
１ａ，１ｂ・・・軸受内オイル通路
２・・・外輪（固定側部材）
２ａ・・・固定側オイル通路
３・・・回動側部材
４・・・内輪
４ｃ，５ｂ・・・オイル通路（回動側オイル通路）
５・・・ハブ輪
６・・・転動体
７ａ・・・液圧空気圧変換器
７ｂ・・・オイル配管
７ｃ・・・エア配管
８，１８，１９・・・密封装置
１０・・・タイヤ空気圧調整装置
１１・・・油圧発生装置
１２・・・車輪
１３・・・ブレーキロータ
１４・・・タイヤ
１５・・・ナックル（車体側の部材）
DESCRIPTION OF SYMBOLS 1 ... Wheel hub unit 1a, 1b ... Oil path in bearing 2 ... Outer ring (fixed side member)
2a: fixed side oil passage 3 ... rotation side member 4 ... inner ring 4c, 5b ... oil passage (rotation side oil passage)
5 ... Hub wheel 6 ... Rolling element 7a ... Hydraulic pressure converter 7b ... Oil piping 7c ... Air piping 8, 18, 19 ... Sealing device 10 ... Tire pressure adjustment Device 11 ... Hydraulic generator 12 ... Wheel 13 ... Brake rotor 14 ... Tire 15 ... Knuckle (vehicle body side member)

Claims (2)

車体側の部材に固定される固定側部材と、前記固定側部材に転動体を介して回動可能に支持されかつ車輪が取付けられる回動側部材とを有する車輪用ハブユニットであって、
前記固定側部材を貫通する固定側オイル通路と、前記固定側部材と前記回動側部材の間を密封してこれらの間に軸受内オイル通路を形成する密封装置と、前記回動側部材に形成された回動側オイル通路とを有し、
前記回動側部材側には、前記固定側オイル通路と前記軸受内オイル通路と前記回動側オイル通路とを経て供給されたオイルの液圧を空気圧に変換してタイヤ側に供給する液圧空気圧変換器が設けられていることを特徴とする車輪用ハブユニット。 A wheel hub unit having a fixed side member fixed to a vehicle body side member, and a rotating side member that is rotatably supported by the fixed side member via a rolling element and to which a wheel is attached;
A fixed-side oil passage that penetrates the fixed-side member, a sealing device that seals between the fixed-side member and the rotating-side member and forms an oil passage in the bearing therebetween, and the rotating-side member A rotation-side oil passage formed,
On the rotation side member side, the hydraulic pressure of oil supplied through the fixed side oil passage, the bearing oil passage, and the rotation side oil passage is converted into air pressure and supplied to the tire side. A wheel hub unit, characterized in that an air pressure converter is provided. 請求項１に記載の車輪用ハブユニットであって、
一対の密封装置が、固定側部材と回動側部材の間に設けられる転動体の両側位置に設けられ、前記転動体が前記一対の密封装置によって形成される軸受内オイル通路内に配設されていることを特徴とする車輪用ハブユニット。

The wheel hub unit according to claim 1,
A pair of sealing devices are provided at both side positions of the rolling element provided between the fixed side member and the rotating side member, and the rolling element is disposed in an oil passage in the bearing formed by the pair of sealing devices. A hub unit for a wheel, characterized by

JP2007084355A 2007-03-28 2007-03-28 Hub unit for wheels Pending JP2008239024A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2007084355A JP2008239024A (en) 2007-03-28 2007-03-28 Hub unit for wheels

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007084355A JP2008239024A (en) 2007-03-28 2007-03-28 Hub unit for wheels

Publications (1)

Publication Number Publication Date
JP2008239024A true JP2008239024A (en) 2008-10-09

Family

ID=39910859

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2007084355A Pending JP2008239024A (en) 2007-03-28 2007-03-28 Hub unit for wheels

Country Status (1)

Country Link
JP (1) JP2008239024A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103818200A (en) * 2014-03-03 2014-05-28 苏州巴吉赛车科技有限公司 Wheel hub component with air inflation function
CN113165451A (en) * 2018-11-21 2021-07-23 美国联合金属制品股份有限公司 Wheel end arrangement with a generator
US11915530B2 (en) 2019-10-09 2024-02-27 Consolidated Metco, Inc. Wheel end monitoring apparatus, fastener, and method
US11932050B2 (en) 2017-09-22 2024-03-19 Consolidated Metco, Inc. Wheel hub

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04303005A (en) * 1991-03-31 1992-10-27 Mazda Motor Corp Supporting force control device of tire wheel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04303005A (en) * 1991-03-31 1992-10-27 Mazda Motor Corp Supporting force control device of tire wheel

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103818200A (en) * 2014-03-03 2014-05-28 苏州巴吉赛车科技有限公司 Wheel hub component with air inflation function
US11932050B2 (en) 2017-09-22 2024-03-19 Consolidated Metco, Inc. Wheel hub
US12208643B2 (en) 2017-09-22 2025-01-28 Consolidated Metco, Inc. Wheel hub
CN113165451A (en) * 2018-11-21 2021-07-23 美国联合金属制品股份有限公司 Wheel end arrangement with a generator
CN113165451B (en) * 2018-11-21 2023-12-01 美国联合金属制品股份有限公司 Wheel end unit with generator
US11915530B2 (en) 2019-10-09 2024-02-27 Consolidated Metco, Inc. Wheel end monitoring apparatus, fastener, and method

Similar Documents

Publication Publication Date Title
US5147494A (en) Seal device for tire pressure-adjusting device
EP2969600B1 (en) Assembly
US9919569B2 (en) Tire inflation system having a rotary coupling
EP3164273B1 (en) Rotary seal for a central tire inflation system
JP5547555B2 (en) In-wheel motor drive device
CN105691184A (en) Wheel hub driving assembly
WO2013047695A1 (en) Bearing device for wheel with built-in in-wheel motor
CN105599591A (en) Wheel hub drive assembly
EP3439895B1 (en) A connection device for an axle of a vehicle
JP2008239024A (en) Hub unit for wheels
JP5948945B2 (en) In-wheel motor unit and air pressure adjusting device
WO2017145653A1 (en) In-wheel motor drive device
US10675923B2 (en) Pneumatic system for inflating a wheel, integrated to a driven axle
US7591349B2 (en) Liquid cooled brake assembly
US11654728B2 (en) Steering pivot pin forming an internal pneumatic passage
JP5328136B2 (en) Wheel bearing
JP2008094156A (en) Bearing device for driving wheel
JP2008239025A (en) Rolling bearing device for wheels
JP2007131151A (en) Drive wheel bearing unit with pneumatic control mechanism
JP2012041969A (en) Boot for constant velocity universal joint and constant velocity universal joint
JP3676198B2 (en) Radial type hydraulic motor and drive device including the same
JP4396741B2 (en) Axle device mounting structure and mounting method
JP2006248258A (en) Wheel support bearing with pneumatic control mechanism
JP2008100620A (en) Bearing unit for driven wheel with pneumatic control mechanism
JP2023154326A (en) Bearing device for wheels

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20100222

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20120521

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20120612

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20121106