JP6330315B2 - Dust cover for pulley unit and pulley unit - Google Patents

Dust cover for pulley unit and pulley unit Download PDF

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JP6330315B2
JP6330315B2 JP2013262569A JP2013262569A JP6330315B2 JP 6330315 B2 JP6330315 B2 JP 6330315B2 JP 2013262569 A JP2013262569 A JP 2013262569A JP 2013262569 A JP2013262569 A JP 2013262569A JP 6330315 B2 JP6330315 B2 JP 6330315B2
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pulley unit
dust cover
pulley
rolling bearing
outer ring
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JP2015117797A (en
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潤沢 趙
潤沢 趙
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NSK Ltd
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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
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • F16C13/006—Guiding rollers, wheels or the like, formed by or on the outer element of a single bearing or bearing unit, e.g. two adjacent bearings, whose ratio of length to diameter is generally less than one
    • 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
    • F16C33/80—Labyrinth sealings
    • F16C33/805—Labyrinth sealings in addition to other sealings, e.g. dirt guards to protect sealings with sealing lips
    • 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
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • 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
    • F16C2361/00—Apparatus or articles in engineering in general
    • F16C2361/63—Gears with belts and pulleys
    • 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
    • F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
    • F16C33/7843—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc
    • F16C33/7853—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with one or more sealing lips to contact the inner race
    • F16C33/7856—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with one or more sealing lips to contact the inner race with a single sealing lip

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pulleys (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
  • Sealing Of Bearings (AREA)
  • Rolling Contact Bearings (AREA)

Description

本発明は、プーリユニット用ダストカバー及びプーリユニットに関し、特に、エンジン補機等に使用されるプーリユニット用ダストカバー及びプーリユニットに関する。   The present invention relates to a dust cover for a pulley unit and a pulley unit, and more particularly to a dust cover for a pulley unit and a pulley unit used for an engine accessory or the like.

従来、プーリユニットにおいて、転がり軸受の内輪と外輪との間の軸受空間に水やダストが侵入すること防止するため、該環状空間の端部にシール部材を設けると共に、転がり軸受の側方で、該転がり軸受を覆うカバー部材を設けたものが知られている（例えば、特許文献１参照）。この特許文献１に記載のカバー部材には、該カバー部材とシール部材との隙間に侵入する水やダストを受け止めて排出する環状凹部が形成されている。
また、特許文献２に記載のアイドラプーリにおいても、転がり軸受へのダスト侵入を確実に防止するため、外周部がベアリングを覆い隠すように断面Ｃ字形に湾曲せしめた円板状の板材が設けられ、プーリの内側リング部の外側面に可撓性シール材を板材と支持体の張出部とに接触させたものが知られている。 Conventionally, in the pulley unit, in order to prevent water and dust from entering the bearing space between the inner ring and the outer ring of the rolling bearing, a seal member is provided at the end of the annular space, and at the side of the rolling bearing, What provided the cover member which covers this rolling bearing is known (for example, refer to patent documents 1). The cover member described in Patent Document 1 is formed with an annular recess that receives and discharges water and dust that enter the gap between the cover member and the seal member.
The idler pulley described in Patent Document 2 is also provided with a disk-shaped plate material that is curved in a C-shaped cross section so that the outer peripheral portion covers the bearing in order to reliably prevent dust from entering the rolling bearing. In addition, there is known one in which a flexible sealing material is brought into contact with a plate material and a protruding portion of a support on the outer surface of an inner ring portion of a pulley.

特開２０１２−１６３１２４号公報JP 2012-163124 A 特開平５−３２２００５号公報JP-A-5-322005

ところで、特許文献１に記載のカバー部材では、外輪回転プーリに対して、上側の環状凹部で受け止めた水やダストが排出されず、上側の環状凹部にて留まってしまう可能性がある。また、特許文献２に記載のプーリユニットでは、可撓性シール部材を用いており、コストが嵩むという課題がある。   By the way, in the cover member of patent document 1, the water and dust received by the upper annular recessed part are not discharged | emitted with respect to an outer ring | wheel rotation pulley, and there exists a possibility that it may remain in an upper annular recessed part. Moreover, in the pulley unit of patent document 2, the flexible sealing member is used and there exists a subject that cost increases.

本発明は、前述した課題に鑑みてなされたものであり、その目的は、プーリユニットの防水性能を向上することができるプーリユニット用ダストカバー及びプーリユニットを提供することにある。   The present invention has been made in view of the above-described problems, and an object thereof is to provide a pulley cover dust cover and a pulley unit capable of improving the waterproof performance of the pulley unit.

本発明の上記目的は、下記の構成により達成される。
（１） 外輪の周囲にプーリが設けられた転がり軸受の軸方向側方に配置され、前記転がり軸受の軸受空間を覆うプーリユニット用ダストカバーであって、
前記転がり軸受と軸方向で対向する円板部には、複数の環状の凹部を形成する波状部が形成され、
前記波状部は、少なくとも前記外輪と軸方向で対向する部分に形成されており、且つ、前記外輪及び軸受シールと接触しないことを特徴とするプーリユニット用ダストカバー。
（２） （１）に記載のプーリユニット用ダストカバーを備えることを特徴とするプーリユニット。 The above object of the present invention can be achieved by the following constitution.
(1) A dust cover for a pulley unit that is disposed on an axial side of a rolling bearing provided with a pulley around an outer ring and covers a bearing space of the rolling bearing,
In the disk portion facing the rolling bearing in the axial direction, a wavy portion forming a plurality of annular recesses is formed ,
2. The pulley unit dust cover according to claim 1, wherein the wavy portion is formed at least in a portion facing the outer ring in the axial direction, and does not contact the outer ring and the bearing seal .
(2) A pulley unit comprising the pulley unit dust cover according to (1) .

本発明のプーリユニット用ダストカバー及びプーリユニットによれば、前記転がり軸受と軸方向で対向する円板部には、複数の環状の凹部を形成する波状部が形成され、波状部は、少なくとも外輪と軸方向で対向する部分に形成されており、且つ、外輪及び軸受シールと接触しないので、ダストカバーの表面積を拡大し、ダストカバーに付着する水の落下時間を延ばして、その間にエンジン周辺の温度によって水を蒸発させることができる。また、水の流れを誘導することができ、プーリユニットの防水性能を向上することができる。 According to the pulley unit dust cover and the pulley unit of the present invention, the disk portion facing the rolling bearing in the axial direction is formed with a wave-like portion forming a plurality of annular recesses, and the wave- like portion is at least an outer ring. and it is formed in a portion facing in the axial direction and does not contact the outer ring and bearing seal, expanding the surface area of the dust cover, extending the fall time of the water that adheres to the dust cover, near the engine during Water can be evaporated by temperature. Moreover, the flow of water can be induced and the waterproof performance of the pulley unit can be improved.

本発明の一実施形態に係るプーリユニット用ダストカバーを備えたプーリユニットの断面図である。It is sectional drawing of the pulley unit provided with the dust cover for pulley units which concerns on one Embodiment of this invention. プーリユニット用ダストカバーを示す断面図である。It is sectional drawing which shows the dust cover for pulley units. （ａ）は本発明の変形例に係るプーリユニット用ダストカバーを示す断面図であり、（ｂ）は本発明の他の変形例に係るプーリユニット用ダストカバーを示す断面図である。(A) is sectional drawing which shows the dust cover for pulley units which concerns on the modification of this invention, (b) is sectional drawing which shows the dust cover for pulley units which concerns on the other modification of this invention.

以下、本発明の一実施形態に係るプーリユニット用ダストカバーを備えたプーリユニットについて、図面を参照して説明する。   Hereinafter, a pulley unit including a dust cover for a pulley unit according to an embodiment of the present invention will be described with reference to the drawings.

本実施形態のプーリユニット１０は、互いに同心に設けられた内径側円筒部１５及び外径側円筒部１６と、この内径側円筒部１５の中間部外周面と外径側円筒部１６の中間部内周面とを連続させる円輪状１７の連結部と、を備えるプーリ１８を有し、内径側円筒部１５を転がり軸受１２を構成する外輪１３の周囲に配置する。外径側円筒部１６の外周面には、図示しないベルトが接触する。   The pulley unit 10 of the present embodiment includes an inner diameter side cylindrical portion 15 and an outer diameter side cylindrical portion 16 that are provided concentrically with each other, and an intermediate portion outer peripheral surface of the inner diameter side cylindrical portion 15 and an inner portion of the outer diameter side cylindrical portion 16. A pulley 18 having an annular ring-like connecting portion that is continuous with the peripheral surface, and an inner diameter side cylindrical portion 15 is arranged around an outer ring 13 that constitutes the rolling bearing 12. A belt (not shown) is in contact with the outer peripheral surface of the outer diameter side cylindrical portion 16.

転がり軸受１２を構成する内輪１４は、ボルト２０のねじ部２１が形成されていない外周面２０ａに外嵌されており、図示しないケースに締結固定される。また、ボルト２０の周囲には、ボルト２０の頭部２２と転がり軸受１２との間、及び転がり軸受１２とケースとの間に、転がり軸受１２の軸方向側方で、転がり軸受１２の外輪１３と内輪１４との間に形成された軸受空間を覆うように配置される一対のダストカバー３０が設けられている。なお、転がり軸受１２の様式は、玉軸受に限定されず、また、転がり軸受１２には、軸受シール１１や図示しない保持器が設けられている。   The inner ring 14 constituting the rolling bearing 12 is externally fitted to an outer peripheral surface 20a where the screw portion 21 of the bolt 20 is not formed, and is fastened and fixed to a case (not shown). Further, an outer ring 13 of the rolling bearing 12 is provided around the bolt 20 between the head 22 of the bolt 20 and the rolling bearing 12 and between the rolling bearing 12 and the case, on the axial side of the rolling bearing 12. A pair of dust covers 30 are provided so as to cover a bearing space formed between the inner ring 14 and the inner ring 14. The style of the rolling bearing 12 is not limited to a ball bearing, and the rolling bearing 12 is provided with a bearing seal 11 and a cage (not shown).

図２も参照して、ダストカバー３０は、プレス加工によって製造され、中心に開口部３１ａを有し、転がり軸受１２と軸方向で対向する円板部３１と、該円板部３１の外周部で、内径側円筒部１５の外周上を覆う円筒部３３と、を備え、断面略Ｃ字形に形成される。また、円板部３１のうち、少なくとも外輪１３と軸方向で対向する部分には、外輪１３の軸方向端面及び軸受シール１１の軸方向端面と接触しないように複数回折り曲げられて断面が波形形状となる波状部３２が設けられており、ダストカバー３０の表面積を拡大している。   Referring also to FIG. 2, the dust cover 30 is manufactured by press working, and has an opening 31 a at the center, a disk part 31 that faces the rolling bearing 12 in the axial direction, and an outer peripheral part of the disk part 31. The cylindrical portion 33 covering the outer periphery of the inner diameter side cylindrical portion 15 is formed in a substantially C-shaped cross section. In addition, at least a portion of the disc portion 31 facing the outer ring 13 in the axial direction is bent a plurality of times so as not to contact the axial end surface of the outer ring 13 and the axial end surface of the bearing seal 11, and the cross-sectional shape is corrugated. The wavy portion 32 is provided, and the surface area of the dust cover 30 is enlarged.

また、ダストカバー３０の内部に付着した水は、円板部３１において波状部３２を越えながら上方から下方へ流れるとともに、波状部３２によって形成される複数の環状の凹部３２ａに沿って上方から下方へと流れることで、水の落下時間を延ばし、その間にエンジン周辺の温度によって水を蒸発させることができる。また、波状部３２によって水の流れを誘導することができ、プーリユニット１０の防水性能を向上することができる。   In addition, the water adhering to the inside of the dust cover 30 flows from the upper side to the lower side while passing over the corrugated portion 32 in the disc portion 31, and downward from the upper side along a plurality of annular recesses 32 a formed by the corrugated portion 32. The water can be allowed to evaporate depending on the temperature around the engine while extending the water fall time. Moreover, the flow of water can be induced by the wavy portion 32, and the waterproof performance of the pulley unit 10 can be improved.

以上説明したように、本実施形態のプーリユニット用ダストカバー３０及びプーリユニット１０によれば、該ダストカバー３０は、外輪１３の周囲にプーリ１８が設けられた転がり軸受１２の軸方向側方で、転がり軸受１２の軸受空間を覆うように配置される。また、転がり軸受１２と軸方向で対向する円板部３１には、波状部３２が形成される。これにより、ダストカバー３０の表面積を拡大し、ダストカバー３０に付着する水の落下時間を延ばして、その間にエンジン周辺の温度によって水を蒸発させることができる。また、水の流れを誘導することができ、プーリユニット１０の防水性能を向上することができる。   As described above, according to the pulley unit dust cover 30 and the pulley unit 10 of the present embodiment, the dust cover 30 is located on the axial side of the rolling bearing 12 in which the pulley 18 is provided around the outer ring 13. It is arranged so as to cover the bearing space of the rolling bearing 12. In addition, a wave-like portion 32 is formed in the disc portion 31 that faces the rolling bearing 12 in the axial direction. As a result, the surface area of the dust cover 30 can be increased, the falling time of the water adhering to the dust cover 30 can be extended, and the water can be evaporated by the temperature around the engine during that time. Moreover, the flow of water can be induced and the waterproof performance of the pulley unit 10 can be improved.

また、ダストカバー３０は、プレス加工で製造されるので、波状部３２を容易に加工することができる。   Moreover, since the dust cover 30 is manufactured by press work, the wavy part 32 can be processed easily.

さらに、波状部３２は、少なくとも外輪１３と軸方向で対向する部分に形成されており、且つ、外輪１３及び軸受シール１１と接触しないので、ダストカバー３０が外輪回転の際の摺動抵抗となるのを防止することができる。   Further, the wavy portion 32 is formed at least in a portion facing the outer ring 13 in the axial direction and does not contact the outer ring 13 and the bearing seal 11, so that the dust cover 30 becomes a sliding resistance when the outer ring rotates. Can be prevented.

尚、本発明は、前述した各実施形態に限定されるものではなく、適宜、変形、改良、等が可能である。
たとえば、上記実施形態では、転がり軸受１２の内輪１４が直接ボルト２０に外嵌されるように構成されていたが、これに限らず、内輪１４は環状の支持体などを介してボルト２０に固定されてもよい。 In addition, this invention is not limited to each embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably.
For example, in the above embodiment, the inner ring 14 of the rolling bearing 12 is configured to be directly fitted onto the bolt 20. However, the present invention is not limited to this, and the inner ring 14 is fixed to the bolt 20 via an annular support. May be.

また、プーリユニットやダストカバーの形状は、上記実施形態のものに限定されず、他の形状であってもよい。
たとえば、ダストカバー３０の波状部３２は、図３（ａ）に示すように、軸方向頂部を尖らせたものや、図３（ｂ）に示すように、軸方向頂部に平面を有する形状であってもよい。 Further, the shapes of the pulley unit and the dust cover are not limited to those in the above embodiment, and may be other shapes.
For example, the corrugated portion 32 of the dust cover 30 has a shape having a sharp apex in the axial direction as shown in FIG. 3A or a shape having a flat surface at the apex in the axial direction as shown in FIG. There may be.

１０ プーリユニット
１１ 軸受シール
１２ 転がり軸受
１３ 外輪
１８ プーリ
２０ ボルト
３０ダストカバー
３１ 円板部
３２ 波状部 DESCRIPTION OF SYMBOLS 10 Pulley unit 11 Bearing seal 12 Rolling bearing 13 Outer ring 18 Pulley 20 Bolt 30 Dust cover 31 Disc part 32 Wave part

Claims (2)

外輪の周囲にプーリが設けられた転がり軸受の軸方向側方に配置され、前記転がり軸受の軸受空間を覆うプーリユニット用ダストカバーであって、
前記転がり軸受と軸方向で対向する円板部には、複数の環状の凹部を形成する波状部が形成され、
前記波状部は、少なくとも前記外輪と軸方向で対向する部分に形成されており、且つ、前記外輪及び軸受シールと接触しないことを特徴とするプーリユニット用ダストカバー。 A dust cover for a pulley unit that is disposed on the axial side of a rolling bearing provided with a pulley around an outer ring and covers a bearing space of the rolling bearing,
In the disk portion facing the rolling bearing in the axial direction, a wavy portion forming a plurality of annular recesses is formed ,
2. The pulley unit dust cover according to claim 1, wherein the wavy portion is formed at least in a portion facing the outer ring in the axial direction, and does not contact the outer ring and the bearing seal . 請求項１に記載のプーリユニット用ダストカバーを備えることを特徴とするプーリユニット。 A pulley unit comprising the dust cover for a pulley unit according to claim 1 .
JP2013262569A 2013-12-19 2013-12-19 Dust cover for pulley unit and pulley unit Expired - Fee Related JP6330315B2 (en)

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JP6330315B2 true JP6330315B2 (en) 2018-05-30

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JP6779731B2 (en) * 2016-09-28 2020-11-04 Ntn株式会社 Pulley
DE102016222110A1 (en) * 2016-11-10 2017-03-16 Audi Ag Wheel bearing arrangement for a motor vehicle
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