JP2014141183A5

JP2014141183A5 -

Info

Publication number: JP2014141183A5
Application number: JP2013011145A
Authority: JP
Filing date: 2013-01-24
Publication date: 2016-03-17
Anticipated expiration: 2033-01-24

Description

上記課題を解決するために、請求項１に記載の発明は、車両用ステアリング装置において、ハウジングに回転可能に支持されたピニオン軸と、前記ピニオン軸のピニオンと噛み合うラックを有し、前記ハウジング内に設置された軸方向に変位可能なラック軸と、前記ハウジングの前記ピニオン軸を覆うジョイントカバーと、前記ジョイントカバーに嵌合し、前記ピニオン軸の外周を囲むダストカバーと、前記ダストカバーの内周に設けた遮音部材と、前記ダストカバー内に設けられ、前記遮音部材と前記ピニオン軸の外周との間をシールするシール部材と、を備え、前記遮音部材の外周端部は前記ダストカバーの内周に形成された環状溝に嵌合するとともに、前記遮音部材の内周端部は前記シール部材の外周に形成された環状溝に嵌合することを要旨とする。
請求項２に記載の発明は、請求項１に記載の車両用ステアリング装置において、前記ジョイントカバーは、前記ハウジングの前記ピニオン軸方向の上端に取り付けられ、前記ハウジングの上端に形成された開口部を覆っていることを要旨とする。
請求項３に記載の発明は、請求項１または２に記載の車両用ステアリング装置において、前記遮音部材は、前記ダストカバーの前記ラックと前記ピニオンとの噛み合い側に設けられていることを要旨とする。
請求項４に記載の発明は、請求項１〜３のいずれか一項に記載の車両用ステアリング装置において、前記遮音部材は、環状で円板形状であることを要旨とする。 In order to solve the above problems, the invention according to claim 1, in a steering apparatus for a vehicle, comprising: a pinion shaft rotatably supported in the housing, the rack meshing with a pinion of the pinion shaft, the housing A rack shaft installed in the axial direction, a joint cover that covers the pinion shaft of the housing, a dust cover that fits into the joint cover and surrounds the outer periphery of the pinion shaft, and an inside of the dust cover sound member shielding provided on the peripheral, the provided within the dust cover, and a seal member for sealing between the outer periphery of the sound insulating member and the pinion shaft, the outer peripheral edge of the sound insulating member is the dust cover inner with fitted to the formed annular groove in the circumferential inner peripheral end portion of the sound insulating member is fitted child in an annular groove formed on the outer periphery of said seal member The the gist.
According to a second aspect of the present invention, in the vehicle steering apparatus according to the first aspect, the joint cover is attached to an upper end of the housing in the pinion axial direction, and has an opening formed at the upper end of the housing. The gist is covering.
According to a third aspect of the present invention, in the vehicle steering device according to the first or second aspect, the sound insulation member is provided on a meshing side of the rack and the pinion of the dust cover. To do.
The gist of a fourth aspect of the present invention is the vehicle steering apparatus according to any one of the first to third aspects, wherein the sound insulating member is annular and has a disk shape.

請求項１に係る発明によれば、ダストカバーの内周に遮音部材を設け、その外周端部はダストカバーの内周に設けられた環状溝に嵌め合わされ、内周端部はシール部材の外周に設けられた環状溝に嵌め合わされ保持されている。これにより、ラックとピニオンとの噛み合い部から発生しジョイントカバー内を伝播する異音が遮音部材およびシール部材により遮音される。その結果、異音がダストカバーを透過して車室側へ進入することが抑制され、車両の遮音性を向上させることができる。
請求項２に係る発明によれば、ジョイントカバーはハウジングの開口部を覆っているので、異音がピニオン軸の上端に向かいジョイントカバー内を伝播する。
請求項３に係る発明によれば、遮音部材はダストカバー下端のジョイントカバー側に設けられるので、異音が遮音部材により遮音される。
請求項４に係る発明によれば、遮音部材はダストカバーとシール部材との環状溝に固定されるので、遮音部材の脱落を抑制できる。 According to the first aspect of the present invention , the sound insulating member is provided on the inner periphery of the dust cover, the outer peripheral end thereof is fitted into the annular groove provided on the inner periphery of the dust cover, and the inner peripheral end is the outer periphery of the seal member. Are fitted and held in an annular groove provided in the. Thereby, the noise generated from the meshing part of the rack and the pinion and propagating through the joint cover is insulated by the sound insulation member and the seal member. As a result, abnormal noise is prevented from passing through the dust cover and entering the passenger compartment, and the sound insulation of the vehicle can be improved.
According to the invention of claim 2, since the joint cover covers the opening of the housing, the abnormal noise propagates in the joint cover toward the upper end of the pinion shaft.
According to the invention which concerns on Claim 3, since a sound insulation member is provided in the joint cover side of a dust cover lower end, abnormal noise is sound-insulated by the sound insulation member.
According to the invention which concerns on Claim 4, since a sound insulation member is fixed to the annular groove | channel of a dust cover and a sealing member, drop-off | omission of a sound insulation member can be suppressed.

ピニオンハウジング１６の上端には開口部が形成されており、この開口部を閉塞する、例えば、ゴム製のダストカバー１７が設けられている。ピニオン軸７の一部は、ダストカバー１７を貫通してダストカバー１７の上方へ突出し、さらに、車両のエンジンルームと乗員室（車室）とを仕切るダッシュボード２０に設けられたコラムホール２１を挿通して、車室内に延び、上記中間軸５に自在継手６を介して連結されている。コラムホール２１は、例えば、ゴム製のコラムホールカバー２２によって覆われており、そのコラムホールカバー２２をピニオン軸７が貫通している。 An opening is formed at the upper end of the pinion housing 16 and , for example, a rubber dust cover 17 is provided to close the opening . A part of the pinion shaft 7 passes through the dust cover 17 and protrudes upward from the dust cover 17, and further, a column hole 21 provided in the dashboard 20 that partitions the engine room and the passenger compartment (vehicle compartment) of the vehicle. It extends through the vehicle compartment and is connected to the intermediate shaft 5 via a universal joint 6. The column hole 21 is covered with, for example, a rubber column hole cover 22, and the pinion shaft 7 passes through the column hole cover 22.

ピニオンハウジング１６の上端には、開口部が形成されており、その開口部を覆うようにして、ジョイントカバー２３が、ピニオンハウジング１６の上端に取り付けられている。ジョイントカバー２３の下方内側において、ピニオンハウジング１６の内周には、当該内周とピニオン軸７の外周との間を封止するための、例えば、ゴム製で環状のダストシール２６が保持されている。ジョイントカバー２３は、シール性を有する弾性材料（例えば、ゴム材など）や樹脂材料から構成され、ピニオンハウジング１６の開口部を囲いピニオン軸７の上端に向かいテーパ形状に縮径するように形成されている。 The upper end of the pinion housing 16, openings are formed so as to cover the opening, the joint cover 23 is attached to the upper end of the pinion housing 16. Inside the joint cover 23, for example, a rubber-made annular dust seal 26 is held on the inner periphery of the pinion housing 16 to seal between the inner periphery and the outer periphery of the pinion shaft 7. . Joint cover 23, an elastic material having a sealing property (e.g., rubber material, etc.) is composed or a resin material, is formed so as to diameter tapered toward the upper end of the pinion shaft 7 surrounds the opening of the pinion housing 16 ing.

遮音シールド板２５の外周端部は、ダストカバー１７のジョイントカバー２３側の内周に設けられた環状溝４０に嵌め合わされ、遮音シールド板２５の内周端部は、シール２４の外周に設けられた環状溝４１に嵌め合わされ固定されている。これにより、遮音シールド板２５が内部から脱落することを抑制できる。また、遮音シールド板２５およびシール２４を配置することにより、ダストカバー１７とジョイントカバー２３との嵌め合い部と、ダストカバー１７、遮音シールド板２５およびシール２４との嵌め合い部との間には凸凹状の空間（ラビリンス隙間）が形成されている。 The outer peripheral end of the sound insulating shield plate 25 is fitted into an annular groove 40 provided on the inner periphery of the dust cover 17 on the joint cover 23 side , and the inner peripheral end of the sound insulating shield plate 25 is provided on the outer periphery of the seal 24. The annular groove 41 is fitted and fixed. Thereby, it can control that sound insulation shield board 25 falls out from the inside. Further, by arranging the sound insulation shield plate 25 and the seal 24, the fitting portion between the dust cover 17 and the joint cover 23 and the fitting portion between the dust cover 17, the sound insulation shield plate 25 and the seal 24 are disposed. An uneven space (labyrinth gap) is formed.

Claims

A pinion shaft rotatably supported by the housing;
A rack shaft that meshes with a pinion of the pinion shaft, and a rack shaft that is installed in the housing and is displaceable in an axial direction;
A joint cover covering the pinion shaft of the housing;
A dust cover that fits into the joint cover and surrounds the outer periphery of the pinion shaft;
Sound member shielding provided on the inner periphery of the dust cover,
A seal member provided in the dust cover and sealing between the sound insulating member and the outer periphery of the pinion shaft;
Wherein with the outer peripheral edge of the sound insulating member is fitted into an annular groove formed on the inner periphery of the dust cover, an inner peripheral end portion of the sound insulating member is fitted into an annular groove formed on the outer periphery of said seal member A vehicle steering apparatus characterized by the above.

The vehicle steering device according to claim 1,
The vehicle steering apparatus according to claim 1, wherein the joint cover is attached to an upper end of the housing in the pinion axial direction, and covers an opening formed at the upper end of the housing.

The vehicle steering apparatus according to claim 1 or 2,
The vehicle steering apparatus according to claim 1, wherein the sound insulating member is provided on a meshing side of the dust cover with the rack and the pinion.

In the vehicle steering device according to any one of claims 1 to 3,
The vehicle steering apparatus according to claim 1, wherein the sound insulating member is annular and has a disk shape.