JP4644078B2 - In-wheel motor system - Google Patents

In-wheel motor system Download PDF

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JP4644078B2
JP4644078B2 JP2005263479A JP2005263479A JP4644078B2 JP 4644078 B2 JP4644078 B2 JP 4644078B2 JP 2005263479 A JP2005263479 A JP 2005263479A JP 2005263479 A JP2005263479 A JP 2005263479A JP 4644078 B2 JP4644078 B2 JP 4644078B2
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damper
receiving member
shaft
wheel motor
motor system
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JP2007076403A (en
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尚史 黒川
善也 中村
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KYB Corp
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KYB Corp
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Description

本発明は、ダイレクトドライブホイールを駆動輪とする車輌において用いられるインホイールモータシステムに関するもので、特に、上記モータを、車輌の足回り部品に対して、緩衝機構を介して支持する構成のインホイールモータシステムに関する。   The present invention relates to an in-wheel motor system used in a vehicle having a direct drive wheel as a driving wheel, and in particular, an in-wheel having a configuration in which the motor is supported to a vehicle suspension part via a buffer mechanism. It relates to a motor system.

近年、電気自動車などのモータによって駆動される車輌においては、モータを車輪に内蔵するインホイールモータシステムが採用されつつある。その中でも、図４に示すような、インホイールモータ３を、緩衝機構１０を介して、車輌の足回り部品に対して弾性支持する構成のインホイールモータシステムが注目されている。このインホイールモータシステムは、径方向内側が開放された、モータロータ３Ｒが取り付けられた回転側ケース３ｂと、このモータケース３ｂと同心円状に配置され、上記モータロータ３Ｒと所定の間隔を隔ててモータステータ３Ｓが取り付けられた、径方向外側が開放された非回転側ケース３ａとを軸受け３ｊを介して回転可能に連結した中空形状のダイレクトドライブモータ３の上記非回転側ケース３ａを、図５に示すような、リニアベアリング１４ａとロッド１４ｂとから成る直動ガイド１４Ａと車輌上下方向に作動する上，下のバネ部材１４Ｂ，１４Ｂとを一体に構成したバネ付き直動ガイド１４、及び、シリンダ１５ａと図示しないピストンとこのピストンに連結されたシャフト１５ｂとから成る片ロッド型のダンパー１５とにより結合された２枚のプレート１１，１２を備えた緩衝機構１０を介して、車軸６に結合される車輌の足回り部品であるナックル５に連結するとともに、上記回転側ケース３ｂとホイール２とを、モータ側プレート２１とホイール側プレート２２とを複数のクロスガイド２３Ａ，２３Ｂで連結したフレキシブルカップリング２０により結合する構成となっている（例えば、特許文献１〜３参照）。
なお、図４において、１は上記ホイール２に装着されるタイヤ、４はホイール２とその回転軸において連結されたハブ部、７はショックアブゾーバ等から成るサスペンション部材、８は上記ハブ部４に装着されたブレーキディスクから成る制動装置であり、図５の符号１１ｍは、モータ３側に位置するプレート１１に設けられた上記バネ付き直動ガイド１４及びダンパー１５の受け部材（上部受け部材）で、符号１１ｎは上記バネ付き直動ガイド１４の受け部材（下部受け部材）である。また、符号１２ｍ，１２ｎはそれぞれ、ナックル５側に位置するプレート１２に設けられた上記バネ付き直動ガイド１４及びダンパー１５の固定部材である。
ＷＯ ０２／０８３４４６ Ａ１ 特開２００４−１６１１８９号公報 特開２００５−１７８６８４号公報 In recent years, an in-wheel motor system in which a motor is built in a wheel is being adopted in a vehicle driven by a motor such as an electric vehicle. Among them, an in-wheel motor system configured to elastically support the in-wheel motor 3 with respect to a vehicle suspension part via the buffer mechanism 10 as shown in FIG. The in-wheel motor system includes a rotation-side case 3b with a motor rotor 3R attached to the inner side in the radial direction, a concentric circle with the motor case 3b, and a motor stator spaced apart from the motor rotor 3R by a predetermined distance. FIG. 5 shows the non-rotating side case 3a of the hollow direct drive motor 3 that is rotatably connected to a non-rotating side case 3a, to which a radially outer side is opened, to which 3S is attached via a bearing 3j. A linear motion guide 14A composed of a linear bearing 14a and a rod 14b, a linear motion guide 14 with a spring, and an upper and lower spring members 14B and 14B, which are integrally operated, and a cylinder 15a. A single rod type damper 15 comprising a piston (not shown) and a shaft 15b connected to the piston. It is connected to a knuckle 5 which is an undercarriage part of a vehicle coupled to an axle 6 via a buffer mechanism 10 having two plates 11 and 12 coupled to each other, and the rotating side case 3b and the wheel 2 Are configured to be coupled by a flexible coupling 20 in which the motor side plate 21 and the wheel side plate 22 are coupled by a plurality of cross guides 23A and 23B (see, for example, Patent Documents 1 to 3).
In FIG. 4, 1 is a tire mounted on the wheel 2, 4 is a hub portion connected to the wheel 2 and its rotating shaft, 7 is a suspension member made up of a shock absorber, etc., 8 is attached to the hub portion 4. A reference numeral 11m in FIG. 5 is a receiving member (upper receiving member) of the spring-equipped linear motion guide 14 and the damper 15 provided on the plate 11 located on the motor 3 side. Reference numeral 11n denotes a receiving member (lower receiving member) of the linear guide 14 with a spring. Reference numerals 12m and 12n denote fixing members for the spring-equipped linear motion guide 14 and the damper 15 provided on the plate 12 located on the knuckle 5 side, respectively.
WO 02/083446 A1 JP 2004-161189 A JP 2005-178684 A

ところで、ダンパー１５を上記受け部材１１ｍに固定する方法として、従来は、図６（ａ）に示すように、ダンパー１５のシャフト１５ｂの先端部にネジ穴１５Ｍを形成するとともに、図６（ｂ）に示すように、上記上部受け部材１１ｍに貫通孔１１ｈを設け、上記貫通孔１１ｈから、例えば、六角穴付ボルトのようなボルト１９を差し込んで、このボルト１９を上記ネジ穴１５Ｍに螺入する方法が一般的であった。
しかしながら、ダンパー１５を上記受け部材１１ｍに確実に固定するためには、上記ボルト１９をある程度以上の太さにする必要がある。上記ボルト１９の径が大きいと、図６（ｃ）に示すように、上記シャフト１５ｂの先端部と上記受け部材１１ｍとの接触面積が小さくなっていしまい、そのため、面圧が大きくなり、上記受け部材１１ｍの接触面が陥没する恐れがあった。受け部材１１ｍの接触面が陥没することで、上記ボルト１９の締結軸力が低下し、その結果、上記シャフト１５ｂとボルト１９との間にゆるみが生じてしまうといった問題点があった。
また、上記シャフト１５ｂにボルト１９を螺入する際に、上記シャフト１５ｂを強く把持すると上記シャフト１５ｂを傷つける恐れがあるので、ダンパー１５を受け部材１１ｍに確実に固定することが難しかった。 By the way, as a method of fixing the damper 15 to the receiving member 11m, conventionally, as shown in FIG. 6A, a screw hole 15M is formed at the tip of the shaft 15b of the damper 15, and FIG. As shown in FIG. 4, a through hole 11h is provided in the upper receiving member 11m, and a bolt 19 such as a hexagon socket head bolt is inserted through the through hole 11h, and the bolt 19 is screwed into the screw hole 15M. The method was general.
However, in order to securely fix the damper 15 to the receiving member 11m, it is necessary to make the bolt 19 thicker than a certain degree. When the diameter of the bolt 19 is large, as shown in FIG. 6 (c), the contact area between the tip of the shaft 15b and the receiving member 11m is reduced, so that the surface pressure is increased and the receiving portion is increased. There was a possibility that the contact surface of the member 11m would sink. Since the contact surface of the receiving member 11m is depressed, the fastening axial force of the bolt 19 is lowered, and as a result, there is a problem that loosening occurs between the shaft 15b and the bolt 19.
Further, when the bolt 19 is screwed into the shaft 15b, if the shaft 15b is strongly gripped, the shaft 15b may be damaged, so that it is difficult to securely fix the damper 15 to the receiving member 11m.

本発明は、従来の問題点に鑑みてなされたもので、ダンパーを受け部材に確実に固定するとともに、受け部材の接触面の陥没によるボルトの軸力低下によるゆるみが生じることのないダンパー取付け構造を有するインホイールモータシステムを提供することを目的とする。   The present invention has been made in view of conventional problems, and is a damper mounting structure that securely fixes a damper to a receiving member and does not cause loosening due to a decrease in the axial force of a bolt due to the depression of the contact surface of the receiving member. It aims at providing the in-wheel motor system which has this.

本願の請求項１に記載の発明は、円環状のモータロータと、このモータロータと同心円状に、所定の間隔を隔てて配置されたモータステータと、このモータステータが取り付けられた非回転側ケースと、上下方向に稼動するダンパーを備え、上記非回転側ケースを車輌の足回り部品であるナックルに対して支持する緩衝機構とを備えたインホイールモータシステムにおいて、上記ダンパーの稼動部であるシャフトの先端部にネジ穴を設けるとともに、上記シャフトの先端部にフランジ部を設け、上記シャフトを上記非回転側ケースに取付けられる上記ダンパーの受け部材に締結する際に、上記フランジ部を上記受け部材に当接させて締結する構成としたことを特徴とするものである。
請求項２に記載の発明は、請求項１に記載のインホイールモータシステムにおいて、上記フランジ部に、例えば、円盤の左，右をそれぞれ切り欠いて形成した、上記ネジ穴を挟んで対向する、上記当接面に直角な２つの側面から成る把持部を設けたものである。 The invention described in claim 1 of the present application includes an annular motor rotor, a motor stator concentrically arranged with the motor rotor, and a non-rotating side case to which the motor stator is attached, In an in-wheel motor system including a damper that operates in a vertical direction, and a buffer mechanism that supports the non-rotating side case with respect to a knuckle that is an undercarriage part of a vehicle, a tip of a shaft that is an operation part of the damper In addition to providing a screw hole in the portion, a flange portion is provided at the tip portion of the shaft, and when the shaft is fastened to a receiving member of the damper attached to the non-rotating side case, the flange portion is contacted with the receiving member. It is characterized in that it is configured to be brought into contact and fastened.
The invention according to claim 2 is the in-wheel motor system according to claim 1, wherein the flange portion is formed, for example, by cutting out the left and right sides of the disk and facing each other with the screw hole interposed therebetween. A grip portion having two side surfaces perpendicular to the contact surface is provided.

本発明によれば、インホイールモータを、車輌の足回り部品であるナックルに対して、上下方向に稼動するダンパーを備えた緩衝機構を介して支持した構成のインホイールモータシステムにおいて、上記ダンパーの稼動部であるシャフトの先端部にネジ穴を形成するとともに、上記シャフトの先端部にフランジ部を設け、上記シャフトを上記非回転側ケースに取付けられる上記ダンパーの受け部材に締結する際に、上記フランジ部を上記受け部材に当接させて締結する構成とすることにより、上記シャフトと上記受け部材との接触面積を大きくすることができるので、ダンパーと受け部材とを確実に固定することができるとともに、ゆるみの発生を防止することができる。
このとき、上記フランジ部に、上記ネジ穴を挟んで対向する、上記当接面に直角な２つの側面から成る把持部を設けるようにすれば、シャフトにボルトを螺入する際に、上記把持部にて上記シャフトを把持しながらボルトを螺入することができるため、必要なボルト軸力を得ることができ、ダンパーを受け部材に確実に固定することができる。 According to the present invention, in an in-wheel motor system having a configuration in which an in-wheel motor is supported via a buffer mechanism having a damper that operates in a vertical direction with respect to a knuckle that is an undercarriage part of a vehicle, When a screw hole is formed at the tip of the shaft, which is an operating portion, a flange is provided at the tip of the shaft, and the shaft is fastened to a receiving member of the damper attached to the non-rotating side case. By adopting a configuration in which the flange portion is brought into contact with the receiving member and fastened, the contact area between the shaft and the receiving member can be increased, so that the damper and the receiving member can be securely fixed. At the same time, the occurrence of loosening can be prevented.
At this time, if the flange portion is provided with a gripping portion having two side surfaces perpendicular to the contact surface that are opposed to each other with the screw hole therebetween, the gripping portion can be used when the bolt is screwed into the shaft. Since the bolt can be screwed in while holding the shaft at the portion, the necessary bolt axial force can be obtained, and the damper can be securely fixed to the receiving member.

以下、本発明の最良の形態について、図面に基づき説明する。
図１は、本最良の形態に係るインホイールモータシステムに用いられる緩衝機構１０をインホイールモータ３に取付けた状態を示す図で、本例では、モーター側のプレート１１を省略して、モータ３の非回転側ケース３ａから径方向内側に突設された環状のリブ部材３０を設け、このリブ部材３０に、上，下のガイド受け部材１６ｍ,１６ｎを介して、バネ付き直動ガイド１４のロッド１４ｂの先端側を取付けるとともに、ダンパー受け部材１７を介して、ダンパー１５のシャフト１５ｂの先端部を固定するようにしている。すなわち、上記ガイド受け部材１６ｍと上記ダンパー受け部材１７とが、図５，６に示した従来の上部受け部材１１ｍに相当する。
上記ダンパー１５は、図２に示すように、ネジ穴１５Ｍが設けられたシャフト１５ｂの先端部に円盤の両側を平行に切り欠いた形状のフランジ部１５Ｆが取付けてある。この切り欠いた面１５ｋ，１５ｋは上記フランジ部１５Ｆの当接面（シャフト１５ｂの延長方向に直角な面）に直角な側面であり、以下、上記面１５ｋ，１５ｋを把持部という。
一方、ダンパー受け部材１７は、ボルト１９を上記ネジ穴１５Ｍに螺入するための貫通孔１７ｈと、この貫通孔１７ｈの周りに形成された、上記フランジ部１５Ｆを当接させるための座ぐり部１７ｚとが設けられた受け部１７ｐと、この受け部１７ｐから上記リブ部材３０の周方向に延長する取付け部１７ｑ，１７ｑとを備えており、上記フランジ部１５Ｆを上記受け部材１７に取付ける際には、図３（ａ）に示すように、上記フランジ部１５Ｆを上記座ぐり部１７ｚに当接させ、上記貫通孔１７ｈからボルト１９を上記ネジ穴１５Ｍに螺入して締結する。これにより、上記シャフト１５ｂと上記受け部材１７との接触面積を大きくすることができ、接触面圧を低く抑えることができる。したがって、座面の陥没によるボルト軸力の低下を抑えることができ、上記シャフト１５ｂとボルト１９との間にゆるみが生じることを防止することができる。
また、図３（ｂ）に示すように、上記フランジ部１５Ｆの把持部１５ｋ，１５ｋを、例えば、Ｕ字型の先端部を有する工具４０等で把持しながら、上記シャフト１５ｂにボルト１９を螺入するようにすれば、シャフト１５ｂ本体を傷つけることなく、上記シャフト１５ｂを強く把持しながらボルト１９を螺入することができるので、ダンパー１５をダンパー受け部材１１ｍに確実に固定することができる。 Hereinafter, the best mode of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing a state in which a buffer mechanism 10 used in the in-wheel motor system according to the best mode is attached to the in-wheel motor 3. In this example, the motor-side plate 11 is omitted, and the motor 3 An annular rib member 30 projecting radially inward from the non-rotating side case 3a is provided, and the rib-shaped member 30 is provided with a spring-coupled linear guide 14 via upper and lower guide receiving members 16m and 16n. The tip end side of the rod 14 b is attached and the tip end portion of the shaft 15 b of the damper 15 is fixed via the damper receiving member 17. That is, the guide receiving member 16m and the damper receiving member 17 correspond to the conventional upper receiving member 11m shown in FIGS.
As shown in FIG. 2, the damper 15 is provided with a flange portion 15F having a shape in which both sides of the disk are cut out in parallel at the tip of a shaft 15b provided with a screw hole 15M. The notched surfaces 15k and 15k are side surfaces perpendicular to the contact surface of the flange portion 15F (surface perpendicular to the extending direction of the shaft 15b), and the surfaces 15k and 15k are hereinafter referred to as gripping portions.
On the other hand, the damper receiving member 17 includes a through hole 17h for screwing the bolt 19 into the screw hole 15M, and a counterbore part formed around the through hole 17h for contacting the flange portion 15F. 17z and a mounting portion 17q, 17q extending from the receiving portion 17p in the circumferential direction of the rib member 30, and when the flange portion 15F is mounted to the receiving member 17. As shown in FIG. 3A, the flange portion 15F is brought into contact with the counterbore portion 17z, and a bolt 19 is screwed into the screw hole 15M from the through hole 17h and fastened. Thereby, the contact area of the said shaft 15b and the said receiving member 17 can be enlarged, and a contact surface pressure can be restrained low. Accordingly, it is possible to suppress a decrease in the bolt axial force due to the depression of the seating surface, and it is possible to prevent the looseness between the shaft 15b and the bolt 19 from occurring.
Further, as shown in FIG. 3B, the bolts 19 are screwed onto the shaft 15b while holding the gripping portions 15k, 15k of the flange portion 15F with, for example, a tool 40 having a U-shaped tip. If inserted, the bolt 19 can be screwed in without damaging the main body of the shaft 15b while firmly holding the shaft 15b, so that the damper 15 can be securely fixed to the damper receiving member 11m.

このように、本最良の形態によれば、インホイールモータ３を車輌の足回り部品であるナックル５に対して弾性支持する緩衝機構１０に用いられるダンパー１５のシャフト１５ｂの先端部にフランジ部１５Ｆを設けて、上記フランジ部１５Ｆを、モータ３の非回転側ケース３ａから径方向内側に突設された環状のリブ部材３０に取付けられるダンパー受け部材１７に当接させながら、上記シャフト１５ｂに設けられたネジ穴１５Ｍにボルト１９を螺入して、上記ダンパー１５を上記受け部材１７に締結するようにすれば、シャフト１５ｂと上記受け部材１７との接触面積を大きくすることができるので、ダンパー１５を上記受け部材１７に確実に固定することができ、ゆるみの発生を防止することができる。
このとき、上記フランジ部１５Ｆに、円盤の両側を平行に切り欠いて形成した把持部１５ｋ，１５ｋを設けて、上記シャフト１５ｂにボルト１９を螺入する際に、上記把持部１５ｋ，１５ｋにて上記シャフト１５ｂを把持しながらボルト１９を螺入するようにすれば、ダンパー１５をダンパー受け部材１７に確実に固定することができる。 Thus, according to this best mode, the flange portion 15F is provided at the tip portion of the shaft 15b of the damper 15 used in the buffer mechanism 10 that elastically supports the in-wheel motor 3 with respect to the knuckle 5 that is an undercarriage part of the vehicle. The flange portion 15F is provided on the shaft 15b while abutting against the damper receiving member 17 attached to the annular rib member 30 protruding radially inward from the non-rotating side case 3a of the motor 3. If the bolt 19 is screwed into the formed screw hole 15M and the damper 15 is fastened to the receiving member 17, the contact area between the shaft 15b and the receiving member 17 can be increased. 15 can be securely fixed to the receiving member 17, and the occurrence of looseness can be prevented.
At this time, when the flange portion 15F is provided with gripping portions 15k and 15k formed by cutting out both sides of the disk in parallel, when the bolt 19 is screwed into the shaft 15b, the gripping portions 15k and 15k If the bolt 19 is screwed in while holding the shaft 15b, the damper 15 can be securely fixed to the damper receiving member 17.

以上説明したように、本発明によれば、簡単な構成でダンパーを受け部材に確実に固定することができるとともに、モータの上下動による衝撃力によるゆるみの発生を防ぐことができるので、インホイールモータシステムの耐久性を向上させることができる。   As described above, according to the present invention, the damper can be reliably fixed to the receiving member with a simple structure, and the occurrence of loosening due to the impact force due to the vertical movement of the motor can be prevented. The durability of the motor system can be improved.

本発明の最良の形態に係る緩衝機構の構成を示す図である。It is a figure which shows the structure of the buffer mechanism which concerns on the best form of this invention. 本最良の形態に係るダンパーの構成を示す要部斜視図である。It is a principal part perspective view which shows the structure of the damper which concerns on this best form. 本最良の形態に係るダンパーの取付方法を示す図である。It is a figure which shows the attachment method of the damper which concerns on this best form. 従来のインホイールモータシステムの構成を示す図である。It is a figure which shows the structure of the conventional in-wheel motor system. 従来の緩衝装置の構成を示す図である。It is a figure which shows the structure of the conventional shock absorber. 従来のダンパーの取付方法を示す図である。It is a figure which shows the attachment method of the conventional damper.

符号の説明Explanation of symbols

１５ ダンパー、１５ａ シリンダー、１５ｂ シャフト、１５ｋ 把持部、
１５Ｆ フランジ部、１５Ｍ ネジ穴、１７ ダンパー受け部材、１７ｈ 貫通孔、
１７ｐ 受け部、１７ｑ 取付け部、１７ｚ 座グリ部、１９ ボルト。 15 damper, 15a cylinder, 15b shaft, 15k gripping part,
15F flange part, 15M screw hole, 17 damper receiving member, 17h through hole,
17p receiving part, 17q mounting part, 17z counterbore part, 19 bolt.

Claims (2)

円環状のモータロータと、このモータロータと同心円状に、所定の間隔を隔てて配置されたモータステータと、このモータステータが取り付けられた非回転側ケースと、上下方向に稼動するダンパーを備え、上記非回転側ケースを車輌の足回り部品であるナックルに対して支持する緩衝機構とを備えたインホイールモータシステムにおいて、上記ダンパーの稼動部であるシャフトの先端部にネジ穴を設けるとともに、上記シャフトの先端部にフランジ部を設け、上記シャフトを上記非回転側ケースに取付けられる上記ダンパーの受け部材に締結する際に、上記フランジ部を上記受け部材に当接させて締結する構成としたことを特徴とするインホイールモータシステム。   An annular motor rotor, a motor stator concentrically with the motor rotor, arranged at a predetermined interval, a non-rotating side case to which the motor stator is attached, and a damper that operates in the vertical direction, In an in-wheel motor system including a buffer mechanism for supporting a rotation side case with respect to a knuckle that is an undercarriage part of a vehicle, a screw hole is provided at a tip portion of a shaft that is an operation portion of the damper, A flange portion is provided at a tip portion, and when the shaft is fastened to a receiving member of the damper attached to the non-rotating side case, the flange portion is brought into contact with the receiving member and fastened. In-wheel motor system. 上記フランジ部に、上記ネジ穴を挟んで対向する、上記当接面に直角な２つの側面から成る把持部を設けたことを特徴とする請求項１に記載のインホイールモータシステム。
2. The in-wheel motor system according to claim 1, wherein the flange portion is provided with a grip portion having two side surfaces perpendicular to the abutting surface and opposed to each other with the screw hole interposed therebetween.
JP2005263479A 2005-09-12 2005-09-12 In-wheel motor system Expired - Fee Related JP4644078B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005263479A JP4644078B2 (en) 2005-09-12 2005-09-12 In-wheel motor system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005263479A JP4644078B2 (en) 2005-09-12 2005-09-12 In-wheel motor system

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JP2007076403A JP2007076403A (en) 2007-03-29
JP4644078B2 true JP4644078B2 (en) 2011-03-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Link
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5748104U (en) * 1980-09-04 1982-03-17
JPS6111041U (en) * 1984-06-26 1986-01-22 日産自動車株式会社 Actuator mounting structure of variable damping force type shock absorber
JP2005125970A (en) * 2003-10-24 2005-05-19 Nissan Motor Co Ltd Wheel independent suspension device
JP2005178684A (en) * 2003-12-22 2005-07-07 Bridgestone Corp In-wheel motor system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5748104U (en) * 1980-09-04 1982-03-17
JPS6111041U (en) * 1984-06-26 1986-01-22 日産自動車株式会社 Actuator mounting structure of variable damping force type shock absorber
JP2005125970A (en) * 2003-10-24 2005-05-19 Nissan Motor Co Ltd Wheel independent suspension device
JP2005178684A (en) * 2003-12-22 2005-07-07 Bridgestone Corp In-wheel motor system

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