JPH0379844A - Idle wheel bearing structure - Google Patents

Idle wheel bearing structure

Info

Publication number
JPH0379844A
JPH0379844A JP21581989A JP21581989A JPH0379844A JP H0379844 A JPH0379844 A JP H0379844A JP 21581989 A JP21581989 A JP 21581989A JP 21581989 A JP21581989 A JP 21581989A JP H0379844 A JPH0379844 A JP H0379844A
Authority
JP
Japan
Prior art keywords
inner race
support shaft
screw portion
bearing
threaded portion
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
JP21581989A
Other languages
Japanese (ja)
Inventor
Toshitada Nagasawa
長沢 敏忠
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.)
Denso Corp
Original Assignee
NipponDenso Co Ltd
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 NipponDenso Co Ltd filed Critical NipponDenso Co Ltd
Priority to JP21581989A priority Critical patent/JPH0379844A/en
Publication of JPH0379844A publication Critical patent/JPH0379844A/en
Pending legal-status Critical Current

Links

Landscapes

  • Pulleys (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

PURPOSE:To maintain excellently a bearing function and shorten an axial length of a bearing structure, by forming a female screw portion on an inner periphery surface of an inner race of a bearing, and forming a male screw portion on a part confronting the female screw portion, of a shaft outer periphery surface. CONSTITUTION:An inner race 52 of a ball bearing 50 is coaxially opposed to a male screw portion 32 of a support shaft 30 by means of its female screw portion 52a while the inner race is being rotated by a hexagonal wrench engaged with a projecting portion 52b of the inner race 52, the female screw portion 52a of the inner race 52 is screwed onto the male screw portion 32 of the support shaft 30 to assemble the ball bearing 50 to the support shaft 30. Accordingly, a conventional operation in which a neck portion 31 of the support shaft 30 is projected outward from the inner race 52 and a nut is tightened thereto is eliminated, and at the same time an axial length of a bearing structure is contracted according to the elimination of the nut. Also, an axial direction play of the inner race 52 can be properly prevented without heightening a processing precision.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、アイドルブーり等の遊び車の受承構造に関す
る。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a receiving structure for an idler wheel such as an idler boot.

(従来技術) 従来、例えば、車両のベルトテンショナにおいて採用さ
れるアイドルプーリは、その中央中空部にて、適宜な静
止部材たるブラケットから延出する支持軸にボールベア
リングを介し同心的にかつ回転自在に受承されているの
が通常である。
(Prior Art) Conventionally, for example, an idle pulley used in a vehicle belt tensioner is rotatable concentrically and freely via a ball bearing in its central hollow part on a support shaft extending from a bracket, which is an appropriate stationary member. Usually, it is accepted by

(発明が解決しようとする課題〉 ところで、このような受承構造においては、ボールベア
リングのインナーレースとブラケットとの間で支持軸に
嵌装して環状カラーと、ボールベアリングのインナーレ
ースから外方へ突出する支持軸の先端雄ねじ部に締着し
たナツトとの間においてインナーレースを挟持すること
によって、アイドルブーりをボールベアリングを介し支
持軸に受承せしめるようにしであるため、支持軸の先端
雄ねじ部及びナツトがアイドルプーリの外端面がち外方
へ突出し、その結果、この突出枠だけ、アイドルプーリ
の受承構造の軸方向長さが余分に長くなるという不具合
があった。特に、ベルトテンショナがエンジンルーム内
に配設されているため、上述のような不具合がエンジン
ルーム内の狭い空間の有効利用を著しく妨げる要因とな
っていた。
(Problem to be Solved by the Invention) By the way, in such a receiving structure, the annular collar is fitted onto the support shaft between the inner race of the ball bearing and the bracket, and the outer race from the inner race of the ball bearing is connected to the support shaft. By sandwiching the inner race between the inner race and the nut tightened on the male threaded end of the supporting shaft that protrudes to The external threaded portion and the nut protrude outward from the outer end surface of the idler pulley, and as a result, there is a problem in that the length of the idler pulley receiving structure in the axial direction becomes excessively long due to this protruding frame.In particular, the belt tensioner Since the engine compartment is located within the engine room, the above-mentioned problems have significantly hindered the effective use of the narrow space within the engine compartment.

また、上述のような受承構造においては、環状カラー、
支持軸等の加工精度を高くしないと、ボールベアリング
のインナーレースに軸方向のガタが生じ、その結果、ボ
ールベアリングの受承機能が悪くなるという不具合もあ
った。
In addition, in the above-mentioned receiving structure, an annular collar,
If the machining accuracy of the support shaft, etc. was not high, axial play would occur in the inner race of the ball bearing, resulting in a problem that the receiving function of the ball bearing would deteriorate.

そこで、本発明は、以上のようなことに対処するために
、遊び車の受承構造において、そのベアリングの受承機
能を良好に維持しつつ、受承のための軸方向長さを出来
る限り短くするようにしようとするものである。
Therefore, in order to deal with the above-mentioned problems, the present invention has been developed to reduce the axial length for receiving as much as possible while maintaining the receiving function of the bearing in a receiving structure for an idler wheel. I'm trying to keep it short.

(課題を解決するための手段) かかる課題の解決にあたり、本発明の構成上の特徴は、
静止部材に軸支される軸にベアリングを介し遊び車を同
心的にかつ回転自在に受承するようにした受承構造にお
いて、前記ベアリングのインナーレースの内周面に雌ね
じ部を形成し、一方、前記軸の外周面の前記雌ねじ部に
対応する部分に間離ねじ部に螺着される雄ねじ部を形成
するようにしたことにある。
(Means for solving the problem) In solving the problem, the structural features of the present invention are as follows:
In a receiving structure in which an idler wheel is concentrically and rotatably received via a bearing on a shaft supported by a stationary member, a female threaded portion is formed on the inner circumferential surface of an inner race of the bearing; The present invention is characterized in that a male threaded portion that is screwed onto the spaced threaded portion is formed in a portion of the outer peripheral surface of the shaft that corresponds to the female threaded portion.

(作用効果) このように本発明を構成したことにより、前記ベアリン
グがそのインナーレースの雌ねじ部を前記軸の雄ねじ部
に螺着させるように前記軸に外方から嵌装させれば、前
記ベアリングがそのインナーレースの中空部でもって前
記軸に同心的に組付けられる。このように、前記ベアリ
ングのインナーレースを前記軸に直接螺着して上述の組
付けを行うようにしたので、前記ベアリングの軸方向移
動を防止するために必要とされるナツト及びこのナツト
の締着に必要な前記軸の前記インナーレースからの外方
への突出部ねじ部が不要となり、その結果、前記遊び車
の受承構造の軸方向長さが短くなる。従って、このよう
な受承構造を車両のエンジンルーム内で採用しても、エ
ンジンルーム内の狭い空間を不必要に占積することすく
、同エンジンルーム内の空間を有効に利用できる。
(Operation and Effect) By configuring the present invention as described above, if the bearing is fitted onto the shaft from the outside so that the female threaded portion of the inner race is screwed into the male threaded portion of the shaft, the bearing is assembled concentrically to the shaft through the hollow part of its inner race. In this way, the inner race of the bearing is directly screwed onto the shaft to perform the above-mentioned assembly, so the nut required to prevent the bearing from moving in the axial direction and the tightening of this nut are removed. A threaded portion of the shaft protruding outward from the inner race, which is necessary for mounting, is not required, and as a result, the axial length of the idler wheel receiving structure is shortened. Therefore, even if such a receiving structure is adopted in the engine compartment of a vehicle, the narrow space in the engine compartment is not unnecessarily occupied, and the space in the engine compartment can be used effectively.

また、上述のように、前記ベアリングのインナーレース
を前記軸に直接螺着するようにしたので、同軸の加工精
度が高くなくても、前記ベアリングが、その軸方向のガ
タを伴うことなく、前記軸に固く締着され得る。
In addition, as described above, since the inner race of the bearing is directly screwed onto the shaft, the bearing can be mounted without any play in the axial direction even if the coaxial machining accuracy is not high. It can be firmly fastened to the shaft.

(実施例) 以下、本発明の一実施例を図面により説明すると、第1
図は、車両のエンジンルーム内に配設されるベルトテン
ショナのアイドルプーリ10のための受承構造に本発明
が適用された例を示している。第1図において、符号2
0は、ブラケットを示しており、このブラケット20は
エンジンルーム内の適所にて固定的に立設されている。
(Example) Hereinafter, one example of the present invention will be described with reference to the drawings.
The figure shows an example in which the present invention is applied to a receiving structure for an idle pulley 10 of a belt tensioner disposed in the engine room of a vehicle. In Figure 1, reference numeral 2
0 indicates a bracket, and this bracket 20 is fixedly erected at a proper location within the engine room.

ブラケット20には、段付支持軸30が第1図にて図示
左方からその頚部3]にて嵌装されており、この支持軸
30の頭部32はブラケット20の左側面に当接してい
る。また、支持軸30の軸方向首下部には、雄ねじ部3
2が、アイドルプーリ10の段付軸穴部11にて形成さ
れている。
A stepped support shaft 30 is fitted into the bracket 20 from the left side in FIG. There is. Further, a male threaded portion 3 is provided at the lower part of the axial neck of the support shaft 30.
2 is formed in the stepped shaft hole portion 11 of the idler pulley 10.

カラー40は、段付環状のもので、このカラー40は支
持軸30の首下部に嵌装されてブラケット20の右側面
に大径部41にて当接している。
The collar 40 has a stepped annular shape, and is fitted into the lower part of the neck of the support shaft 30 and abuts the right side surface of the bracket 20 at its large diameter portion 41.

ボールベアリング50は、アウターレース51と、この
アウターレース51から第1図にて図示方向へ同軸的に
突出するようにアウターレース51よりも幅広に形成し
たインナーレース52とを有しており、インナーレース
52の内周面のうちアウターレース51の軸方向幅に対
応する部分には雌ねじ部52aが形成されている。しか
して、インナーレース52は、第1図にて図示右方から
カラー40の小径部42に当接するように、雌ねじ部5
2aにて支持軸31の雄ねじ部32に同心的に螺着され
ている。また、インナーレース52のアウターレース5
1からの第1図にて図示方向への突出部52bは、その
内周面にて、第2図に示すごとく六角穴52cを形成し
てなり、この六角穴52cの形状寸法は、市販の六角レ
ンチの頭部の外形寸法に対応している。但し、インナー
レース52の外端はアイドルプーリ10の外端と共にほ
ぼ同一半径方向上にある。
The ball bearing 50 has an outer race 51 and an inner race 52 formed wider than the outer race 51 so as to protrude coaxially from the outer race 51 in the direction shown in FIG. A female threaded portion 52a is formed in a portion of the inner peripheral surface of the race 52 that corresponds to the axial width of the outer race 51. Thus, the inner race 52 is inserted into the female threaded portion 5 so as to come into contact with the small diameter portion 42 of the collar 40 from the right side in FIG.
It is concentrically screwed onto the male threaded portion 32 of the support shaft 31 at 2a. In addition, the outer lace 5 of the inner lace 52
The protrusion 52b extending in the direction shown in FIG. 1 from 1 has a hexagonal hole 52c formed on its inner peripheral surface as shown in FIG. Compatible with the external dimensions of the hex wrench head. However, the outer end of the inner race 52 and the outer end of the idle pulley 10 are located on substantially the same radial direction.

アイドルプーリ10は、段付軸穴部11の小径部をカラ
ー40の小径部42に同心的に遊嵌させ、段付軸穴部1
1の大径部をボールベアリング50のアウターレース5
1に同心的に嵌合させるようにして、支持軸30の首下
部にボールベアリング50を介し回転自在に受承されて
いる。また、アウターレース51は、アイドルプーリ1
0の段付軸太部11の大径部の内周面外端部分に形成し
た環状溝11aに嵌着してなるストップリング12によ
り、アイドルプーリ10の段付軸穴部1■の小径部に押
付けられて外方への脱出を防止されている。
The idler pulley 10 has a small diameter portion of the stepped shaft hole portion 11 loosely fitted concentrically into the small diameter portion 42 of the collar 40.
The large diameter part of 1 is connected to the outer race 5 of the ball bearing 50.
The support shaft 30 is rotatably received via a ball bearing 50 at the lower part of the neck of the support shaft 30 so as to be concentrically fitted to the support shaft 30 . In addition, the outer race 51 is connected to the idler pulley 1
The small diameter part of the stepped shaft hole part 1■ of the idle pulley 10 is fixed by the stop ring 12 fitted in the annular groove 11a formed on the outer end of the inner peripheral surface of the large diameter part of the stepped shaft thick part 11 of the idler pulley 10. It is pressed against it and prevented from escaping outward.

ダストカバー60は、第2図に示すような屈曲状の半断
面形状を有するように、金属板により環状に形成されて
いるもので、このダストカバー60は、その内周縁部6
1にて、ボールベアリング50のインナーレース52の
突出部52bに外方から圧入により同心的に嵌着されて
いる。また、ダストカバー60は、第1図にて示すごと
く半径方向に屈曲状に延在し、エンジンルーム内に流入
するダストのボールベアリング50内への侵入を阻止す
るようにアイドルプーリ10の外側面中央部を外方から
覆蓋している。
The dust cover 60 is formed into an annular shape using a metal plate so as to have a bent half-sectional shape as shown in FIG.
1, the ball bearing 50 is fitted concentrically to the protrusion 52b of the inner race 52 of the ball bearing 50 by press-fitting from the outside. Further, the dust cover 60 extends in a curved manner in the radial direction as shown in FIG. The central part is covered from the outside.

以上のように構成した本実施例において、アイドルプー
リ10を支持軸30に組付けるにあたっては、第1図に
示すごとく、ボールベアリング50をアイドルプーリ1
0の段付軸穴部11内に嵌装するとともにストップリン
グ12を段付軸穴部11の溝11a内に嵌着しボールベ
アリング50を抜止めする。然る後、支持軸30をブラ
ケット20に第1図に示すように嵌装し、カラー40を
第1図に示すごとく支持軸30の首下部に嵌装し、支持
軸30の頭部32をブラケット20に対し第1図にて図
示左方から押付けるように維持した状態において、ボー
ルベアリング50のインナーレース52をその雌ねじ部
52aにて支持軸30の雄わじ部32に第1図にて図示
左方から同軸的に対向させ、インナーレース52の突出
部52bに六角レンチの頭部を嵌装して、この六角レン
チを回動させながら、インナーレース52の雌ねじ部5
2aを支持軸30の雄ねじ部32に螺合させてゆく。こ
のような状態で、インナーレース52がカラー40に当
接したときアイドルプーリ■0の支持軸30に対する組
付けが終了する。然る後は、六角レンチを除去し、ダス
トカバー60をその内周縁部61にてインナーレース5
2の突出部52bに圧入して第1図に示すごとく組付け
る。これにより、アイドルプーリ10の受承構造が完成
する。
In this embodiment configured as described above, when assembling the idle pulley 10 to the support shaft 30, the ball bearing 50 is attached to the idle pulley 1 as shown in FIG.
At the same time, the stop ring 12 is fitted into the groove 11a of the stepped shaft hole 11 to prevent the ball bearing 50 from coming out. After that, the support shaft 30 is fitted to the bracket 20 as shown in FIG. 1, the collar 40 is fitted to the lower part of the neck of the support shaft 30 as shown in FIG. While the bracket 20 is maintained pressed from the left side as shown in FIG. 1, the inner race 52 of the ball bearing 50 is attached to the male threaded portion 32 of the support shaft 30 with its female threaded portion 52a as shown in FIG. The head of a hexagonal wrench is fitted into the protrusion 52b of the inner race 52 so as to coaxially face each other from the left side in the drawing, and while rotating the hexagonal wrench, the female threaded portion 5 of the inner race 52 is inserted.
2a is screwed onto the male threaded portion 32 of the support shaft 30. In this state, when the inner race 52 comes into contact with the collar 40, the assembly of the idle pulley 0 to the support shaft 30 is completed. After that, remove the hex wrench and attach the dust cover 60 to the inner race 5 at its inner peripheral edge 61.
Press fit into the protrusion 52b of No. 2 and assemble as shown in FIG. This completes the receiving structure for the idler pulley 10.

また、このような受承構造においては、上述のごとく、
ボールベアリング50の支持軸30に対する組付けが、
インナーレース52の支持軸30に対する同心的な螺着
により実現されているので、支持軸30の首下部を従来
のようにインナーレース52から外方へ突出させてナツ
トを締着するというような作業が不要になるとともに、
支持軸30の首下部の長さ、即ちアイドルプーリ10の
受承構造の軸方向長さが、ナツトの不要化に応じ短くな
る。従って、エンジンルーム内の狭い空間におけるアイ
ドルプーリ10の受承構造の占積率が減少しエンジンル
ーム内の有効利用につながる。
In addition, in such a receiving structure, as mentioned above,
The assembly of the ball bearing 50 to the support shaft 30 is performed by
Since this is achieved by concentric screwing of the inner race 52 to the support shaft 30, it is not possible to tighten the nut by protruding the lower part of the neck of the support shaft 30 outward from the inner race 52 as in the conventional work. is no longer necessary, and
The length of the lower part of the neck of the support shaft 30, ie, the axial length of the receiving structure of the idler pulley 10, is shortened as the nut is no longer required. Therefore, the space factor of the receiving structure for the idle pulley 10 in the narrow space in the engine room is reduced, leading to effective utilization of the engine room.

また、ボールベアリング50の支持軸30に対する組付
けが、上述のように、インナーレース52の雌ねじ部5
2aを支持軸30の雄ねじ部32に同心的に螺着させる
ことにより遠戚されているので、インナーレース52の
軸方向のガタが、加工精度を高くすることなく、適正に
防止できる。また、ダスI・カバー60は、インナーレ
ース52に外方から圧入して組付ければよいので、この
ダストカバー60の組付作業が容易となる。
Further, the assembly of the ball bearing 50 to the support shaft 30 is performed using the female threaded portion 5 of the inner race 52 as described above.
2a is concentrically screwed onto the male threaded portion 32 of the support shaft 30, so that play in the axial direction of the inner race 52 can be appropriately prevented without increasing processing accuracy. Further, since the dust I cover 60 can be assembled by press-fitting it into the inner race 52 from the outside, the work of assembling the dust cover 60 is facilitated.

なお、本発明の実施にあたっては、車両のベル1〜テン
シヨナーのアイドルブーりに限らず、各種の遊び車の受
承構造に本発明を適用して実施してもよい。また、ボー
ルベアリングに限らず、各種のベアリングを採用しても
よい。
Note that the present invention is not limited to the idle boom of the bell 1 to tensioner of a vehicle, and may be applied to various types of idle wheel receiving structures. Further, not only ball bearings but also various types of bearings may be used.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の一実施例を示す半断面図、及び第2図
は第1図のボールベアリングのインナーレースの右側面
図である。 符号の説明 10・・・アイドルプーリ、20 ・・ブラケッ1−1
30・・・支持軸、32・・・雄ねじ部、50・・・ボ
ールベアリング、52・・・インナーレース、52b・
・・雌ねじ部。
FIG. 1 is a half-sectional view showing one embodiment of the present invention, and FIG. 2 is a right side view of the inner race of the ball bearing shown in FIG. 1. Explanation of symbols 10... Idle pulley, 20... Bracket 1-1
30...Support shaft, 32...Male thread portion, 50...Ball bearing, 52...Inner race, 52b.
...Female thread part.

Claims (1)

【特許請求の範囲】[Claims] 静止部材に軸支される軸にベアリングを介し遊び車を同
心的にかつ回転自在に受承するようにした受承構造にお
いて、前記ベアリングのインナーレースの内周面に雌ね
じ部を形成し、一方、前記軸の外周面の前記雌ねじ部に
対応する部分に同雌ねじ部に螺着される雄ねじ部を形成
するようにしたことを特徴とする遊び車の受承構造。
In a receiving structure in which an idler wheel is concentrically and rotatably received via a bearing on a shaft supported by a stationary member, a female threaded portion is formed on the inner circumferential surface of an inner race of the bearing; A receiving structure for an idler wheel, characterized in that a male threaded portion is formed in a portion of the outer peripheral surface of the shaft corresponding to the female threaded portion to be screwed into the female threaded portion.
JP21581989A 1989-08-22 1989-08-22 Idle wheel bearing structure Pending JPH0379844A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21581989A JPH0379844A (en) 1989-08-22 1989-08-22 Idle wheel bearing structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21581989A JPH0379844A (en) 1989-08-22 1989-08-22 Idle wheel bearing structure

Publications (1)

Publication Number Publication Date
JPH0379844A true JPH0379844A (en) 1991-04-04

Family

ID=16678786

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21581989A Pending JPH0379844A (en) 1989-08-22 1989-08-22 Idle wheel bearing structure

Country Status (1)

Country Link
JP (1) JPH0379844A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6228924B2 (en) * 1980-06-05 1987-06-23 Toyo Aerosol Ind Co

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6228924B2 (en) * 1980-06-05 1987-06-23 Toyo Aerosol Ind Co

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