JP2016222062A - Driving and braking device of wheel - Google Patents

Driving and braking device of wheel Download PDF

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JP2016222062A
JP2016222062A JP2015108906A JP2015108906A JP2016222062A JP 2016222062 A JP2016222062 A JP 2016222062A JP 2015108906 A JP2015108906 A JP 2015108906A JP 2015108906 A JP2015108906 A JP 2015108906A JP 2016222062 A JP2016222062 A JP 2016222062A
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wheel
bearing
vehicle body
hub
electric motor
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JP6548456B2 (en
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浩義 中川
Hiroyoshi Nakagawa
浩義 中川
友晴 渡邉
Tomoharu Watanabe
友晴 渡邉
吉川　豊
Yutaka Yoshikawa
豊 吉川
寛隆 伊藤
Hirotaka Ito
寛隆 伊藤
隆 正木
Takashi Masaki
隆 正木
勤 山下
Tsutomu Yamashita
勤 山下
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JATCO Ltd
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JATCO Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a driving and braking device of a wheel, which can suppress the size of the device in a radial direction and an axial direction even when an outer diameter of a projection part on a vehicle body center side of a wheel is large.SOLUTION: A driving and braking device of a wheel comprises: an electric motor 2 for driving, which is mounted on a wheel 11 of a wheel 1 in an in-wheel manner; a power transmission mechanism 3A which comprises an internal tooth gear 31 for output interposed between the wheel 11 and the electric motor 2 and connected to the wheel 11, and can change a rotational speed; a bearing 6 for rotatably supporting the wheel 11 on a vehicle body; and a brake mechanism 7 for applying a brake force to the wheel 11. The electric motor 2, the power transmission mechanism 3A, a hub 12 of the wheel 11 are arranged along an axle direction of the wheel 1 from a vehicle body center side IS to a vehicle body side OS in this order. The internal tooth gear 31 for output and the hub 12 are adjacent to each other along the axle direction. A connection member 5 for power-connecting an outer peripheral part of the internal tooth gear 31 for output to the hub 12 is provided. The bearing 6 and the brake mechanism 7 are arranged side by side on the outer peripheral side of the connection member 5 along the axle direction.SELECTED DRAWING: Figure 1

Description

本発明は、駆動用の電動モータを装備した電動車両に適用する車輪の駆動制動装置に関するものである。   The present invention relates to a wheel drive braking device applied to an electric vehicle equipped with an electric motor for driving.

近年、電動モータを駆動源とする電気自動車やハイブリッド車（以下、これらを総称して「電動車両」と言う）が普及している。このような電動車両には、電動モータを、ホイールの内部に配置した或いはホイールのハブと一体化して同軸で配置した、インホイールモータ式電動車両がある。   In recent years, electric vehicles and hybrid vehicles (hereinafter collectively referred to as “electric vehicles”) using an electric motor as a drive source have become widespread. As such an electric vehicle, there is an in-wheel motor type electric vehicle in which the electric motor is arranged inside the wheel or is integrated with the hub of the wheel and arranged coaxially.

このようなインホイールモータ式電動車両では、電動モータと一体に減速機構を装備して、電動モータの回転を減速してホイールに伝達するようにしたものが多い。これは、高効率で高回転の電動モータを用いながら駆動輪を低回転，高トルクで駆動することができるためである。   Many such in-wheel motor type electric vehicles are equipped with a speed reduction mechanism integrally with the electric motor so that the rotation of the electric motor is reduced and transmitted to the wheel. This is because the drive wheel can be driven at a low rotation and a high torque while using a high-efficiency and high-rotation electric motor.

例えば図２は特許文献１に開示されたインホイールモータ式電動車両の車輪の駆動制動装置を示す縦断面図である。図２に示すように、車輪１０１のホイール１１１にインホイールモータ方式で装備された駆動用の電動モータ１０２と、ホイール１１１と電動モータ１０２との間に介装された減速機構１０３と、ホイール１１１とが、車軸方向に並んで車体中心側から車体側方に向けてこの順に配置されている。なお、ホイール１１１にタイヤ１１２が装着されたものを車輪１０１とする。   For example, FIG. 2 is a longitudinal sectional view showing a wheel drive braking device of an in-wheel motor type electric vehicle disclosed in Patent Document 1. In FIG. As shown in FIG. 2, an electric motor 102 for driving that is mounted on the wheel 111 of the wheel 101 by an in-wheel motor method, a speed reduction mechanism 103 interposed between the wheel 111 and the electric motor 102, and the wheel 111 Are arranged in this order from the center of the vehicle body to the side of the vehicle body in a line in the axle direction. Note that the wheel 111 is a wheel 101 on which a tire 112 is mounted.

ホイール１１１のハブ１１３はボルト１１５によって減速機構１０３の出力軸１３１と締結され、ハブ１１３の車体中心側に突出した凸部１１４の外周及び出力軸１３１の車体側方に突出した突出部１３２の外周は軸受１０６の内輪（インナレース）１６１に軸支されている。軸受１０６の外輪（アウタレース）１６２は電動モータ１０２及び減速機構１０３を収容する車体側のケーシング１０４に支持されている。そして、ケーシング１０４内の軸受１０６の外周側に制動機構１０７が配置されている。   The hub 113 of the wheel 111 is fastened to the output shaft 131 of the speed reduction mechanism 103 by bolts 115, and the outer periphery of the protrusion 114 protruding toward the vehicle body center side of the hub 113 and the outer periphery of the protrusion 132 protruding toward the vehicle body side of the output shaft 131. Is supported by an inner ring (inner race) 161 of the bearing 106. An outer ring (outer race) 162 of the bearing 106 is supported by a casing 104 on the vehicle body side that houses the electric motor 102 and the speed reduction mechanism 103. A braking mechanism 107 is disposed on the outer peripheral side of the bearing 106 in the casing 104.

特開平２−１１４１９号公報JP-A-2-11419

しかしながら、特許文献１のような従来の車輪の駆動制動装置にかかる技術では、以下の課題がある。
つまり、上記の技術では、ディスク，シリンダ及ピストン等からなる制動機構１０７をケーシング１０４内の軸受１０６の外周側に配置することにより、装置を軸方向に小型化している。このようにできるのは、軸受１０６の内側に配置される出力軸１３１の突出部１３２及びハブ１１３の凸部１１４の外径が小さく抑えられているためである。 However, the technology related to the conventional wheel driving and braking device such as Patent Document 1 has the following problems.
In other words, in the above technique, the device is downsized in the axial direction by disposing the braking mechanism 107 including a disk, a cylinder, and a piston on the outer peripheral side of the bearing 106 in the casing 104. The reason for this is that the outer diameters of the protruding portion 132 of the output shaft 131 and the convex portion 114 of the hub 113 that are arranged inside the bearing 106 are kept small.

しかし、例えば操舵輪である前輪を駆動する前輪駆動車の場合などは、ステアリングの操作力が増加するため、これを軽減するために、ホイール１１１の凸部１１４が拡径〔例えばホイール１１１の最大外径（リム径）の半分程度まで拡径〕されたものが増加している。このような凸部の外径が大きいホイールの場合、軸受１０６が大径になりケーシング１０４内の軸受１０６の外周側のスペースが縮小し、制動機構１０７を内蔵することが困難になり、装置を径方向に大型化させなくてはならなくなる。   However, for example, in the case of a front-wheel drive vehicle that drives a front wheel that is a steered wheel, the steering operation force increases. To reduce this, the convex portion 114 of the wheel 111 increases in diameter (for example, the maximum of the wheel 111). Increased to about half the outer diameter (rim diameter) is increasing. In the case of such a wheel having a large outer diameter of the convex portion, the bearing 106 becomes larger in diameter, the space on the outer peripheral side of the bearing 106 in the casing 104 is reduced, and it becomes difficult to incorporate the braking mechanism 107, and the device is The size must be increased in the radial direction.

本発明は、上記の課題を解決しようとするもので、ホイールのハブの車体中心側に突出した凸部の外径が大きい場合であっても、装置の大きさを径方向及び軸方向に抑えることができるようにした、車輪の駆動制動装置を提供することを目的としている。   The present invention is intended to solve the above-described problem, and suppresses the size of the device in the radial direction and the axial direction even when the outer diameter of the convex portion protruding toward the vehicle body center side of the wheel hub is large. It is an object of the present invention to provide a wheel drive braking device that can be used.

（１）上記の目的を達成するために、本発明の車輪の駆動制動装置は、電動車両に装備された車輪のホイールにインホイール式に装備された駆動用の電動モータと、前記ホイールと前記電動モータとの間に介装されると共に前記ホイールに連結された出力用内歯ギヤを有し回転速度を変更可能な動力伝達機構と、前記車両の車体に前記ホイールを回転自在に支持する軸受と、前記ホイールに制動力を付与する制動機構とを備えた、車輪の駆動制動装置であって、前記電動モータ，前記動力伝達機構，及び前記ホイールのハブが、前記車輪の車軸方向に沿って車体中心側から車体側方に向けてこの順に配置され、前記出力用内歯ギヤと前記ハブとが前記車軸方向に沿って隣接し、前記出力用内歯ギヤの外周部と前記ハブとを動力連結する連結部材が装備され、前記軸受及び前記制動機構は、前記連結部材の外周側において、前記車軸方向に沿って並設されていることを特徴としている。   (1) In order to achieve the above object, the wheel drive braking device of the present invention includes a drive electric motor mounted in-wheel on a wheel of a wheel mounted on an electric vehicle, the wheel, A power transmission mechanism that is interposed between the electric motor and has an output internal gear connected to the wheel and that can change the rotation speed, and a bearing that rotatably supports the wheel on the vehicle body of the vehicle A braking mechanism for applying a braking force to the wheel, wherein the electric motor, the power transmission mechanism, and the hub of the wheel are arranged along an axle direction of the wheel. Arranged in this order from the center of the vehicle body to the side of the vehicle body, the output internal gear and the hub are adjacent to each other along the axle direction, and the outer peripheral portion of the output internal gear and the hub are powered. Connecting part to be connected There is equipped with the bearing and the brake mechanism, the outer peripheral side of the connecting member is characterized by being arranged along the axle direction.

（２）前記連結部材に前記軸受の内輪が形成されていることが好ましい。   (2) It is preferable that an inner ring of the bearing is formed on the connecting member.

（３）前記制動機構は、前記軸受の外輪側に装備されたシリンダと、前記シリンダに内挿され前記シリンダに供給される制動圧に応じて先端が突出するピストンと、前記軸受の内輪の車体中心側に形成されたブレーキディスク面と、を備えていることが好ましい。   (3) The brake mechanism includes a cylinder mounted on the outer ring side of the bearing, a piston that is inserted into the cylinder and protrudes at a tip in response to a braking pressure supplied to the cylinder, and a vehicle body of the inner ring of the bearing And a brake disc surface formed on the center side.

本発明によれば、動力伝達機構の出力用内歯ギヤとホイールのハブとを動力連結する連結部材を、これらの外周側に配置しているので、装置の軸方向寸法の増大を抑制することができる。また、軸受と制動機構とを、連結部材の外周側において車軸方向に沿って並設しているので、装置の径方向寸法の増大を抑制することができる。また、軸受と制動機構とを車軸方向に並設しているので、装置の径方向寸法を抑えつつ軸受の径を増大することができ、ホイールのハブの車体中心側に突出した凸部の外径が大きい場合にも、収容が可能になる。   According to the present invention, since the connecting member for power-connecting the internal gear for output of the power transmission mechanism and the hub of the wheel is disposed on the outer peripheral side thereof, an increase in the axial dimension of the device is suppressed. Can do. Moreover, since the bearing and the braking mechanism are arranged side by side along the axle direction on the outer peripheral side of the connecting member, an increase in the radial dimension of the device can be suppressed. In addition, since the bearing and the braking mechanism are arranged side by side in the axle direction, the diameter of the bearing can be increased while suppressing the radial dimension of the device, and the outside of the protruding portion that protrudes toward the vehicle body center side of the wheel hub. Even when the diameter is large, accommodation is possible.

本発明の一実施形態にかかる車輪の駆動制動装置を示す車輪とその車軸部分の縦断面図（上半部のみ示す）である。It is a longitudinal cross-sectional view (only the upper half part is shown) of the wheel which shows the drive braking device of the wheel concerning one Embodiment of this invention, and its axle part. 背景技術にかかる車輪の駆動制動装置を示す車軸部分の縦断面図である。It is a longitudinal cross-sectional view of the axle part which shows the drive braking device of the wheel concerning background art.

以下、図面を参照して本発明の実施形態を説明する。
なお、以下に示す実施形態はあくまでも例示に過ぎず、以下の実施形態で明示しない種々の変形や技術の適用を排除する意図はない。以下の実施形態の各構成は、それらの趣旨を逸脱しない範囲で種々変形して実施することができるとともに、必要に応じて取捨選択することや、適宜組み合わせることが可能である。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Note that the embodiment described below is merely an example, and there is no intention to exclude various modifications and technical applications that are not explicitly described in the following embodiment. Each configuration of the following embodiments can be implemented with various modifications without departing from the spirit thereof, and can be selected or combined as appropriate.

〔構成〕
図１は車輪のホイールと車軸部についてその車軸中心ＣＬの上半部を示す縦断面図である。本実施形態にかかる車両は、駆動源として電動モータを備えた電動車両（電気自動車やハイブリッド車）である。図１に示すように、車両に装備される駆動用の電動モータ２は、車輪１のホイール１１に対して、インホイールモータ方式で、即ち、ホイール１１の内方に同軸に配置されて装備されている。なお、ホイール１１に図示しないタイヤが装着されたものを車輪１とする。 〔Constitution〕
FIG. 1 is a longitudinal sectional view showing an upper half portion of an axle center CL of a wheel and an axle portion of the wheel. The vehicle according to the present embodiment is an electric vehicle (an electric vehicle or a hybrid vehicle) provided with an electric motor as a drive source. As shown in FIG. 1, the electric motor 2 for driving mounted on the vehicle is mounted on the wheel 11 of the wheel 1 in an in-wheel motor system, that is, arranged coaxially inside the wheel 11. ing. The wheel 1 is a wheel 11 on which a tire (not shown) is mounted.

ホイール１１と電動モータ２との間には、回転速度を変更可能な動力伝達機構３Ａとして、変速機構３と出力用内歯ギヤ３１とが装備されている。変速機構３は、電動モータ２と共にケーシング（アクスルケース）４の内部に収容可能な小型のものを適用する必要があり、例えば、マルチディスク変速機構が好適である。変速機構３の出力回転は、出力用内歯ギヤ３１からホイール１１側に出力される。また、電動モータ２，動力伝達機構３Ａ及びホイール１１のハブ１２が、車軸方向（車軸中心ＣＬの方向）に沿って車体中心側（車体内側）ＩＳから車体側方（車体外側）ＯＳに向けてこの順に配置されている。   Between the wheel 11 and the electric motor 2, a speed change mechanism 3 and an output internal gear 31 are provided as a power transmission mechanism 3A capable of changing the rotation speed. The transmission mechanism 3 needs to be a small one that can be housed inside the casing (axle case) 4 together with the electric motor 2. For example, a multi-disc transmission mechanism is suitable. The output rotation of the speed change mechanism 3 is output from the output internal gear 31 to the wheel 11 side. In addition, the electric motor 2, the power transmission mechanism 3A, and the hub 12 of the wheel 11 are directed from the vehicle body center side (vehicle body inner side) IS toward the vehicle body side (vehicle body outer side) OS along the axle direction (direction of the axle center CL). Arranged in this order.

なお、マルチディスク変速機構は、例えば特許第４６６８３０７号公報や特許第５６８３７４８号公報や等に開示された公知の変速機構である。このマルチディスク変速機構は、図示しないが、電動モータ２の出力軸２１に同軸連結された入力軸と、入力軸に平行配置された出力軸と、入力軸に設けられた円板状の入力ディスクと、出力軸に設けられ入力ディスクと重合するように配置された円板状の出力ディスクと、を備えている。   The multi-disk transmission mechanism is a known transmission mechanism disclosed in, for example, Japanese Patent No. 4668307 and Japanese Patent No. 5683748. Although not shown, this multi-disc transmission mechanism includes an input shaft that is coaxially connected to the output shaft 21 of the electric motor 2, an output shaft that is arranged in parallel to the input shaft, and a disc-shaped input disc that is provided on the input shaft. And a disk-shaped output disk disposed on the output shaft and arranged to overlap with the input disk.

そして、入力ディスクと出力ディスクとの重合領域のうち、入力軸の軸心と出力軸の軸心を結ぶ軸心連結線上に沿って移動可能な押圧手段を備えている。押圧手段を要求変速比に応じた位置に移動させて、両ディスクを弾性変形させて圧接するように押圧することにより、両ディスク間にトルク伝達接触部が形成され、押圧手段による両ディスク間の押圧を解除すると両ディスクの弾性復元力によりトルク伝達が遮断される。   In the overlapping region of the input disk and the output disk, there is provided pressing means that can move along an axis connecting line that connects the axis of the input shaft and the axis of the output shaft. By moving the pressing means to a position corresponding to the required gear ratio and pressing both disks so as to be elastically deformed and pressed, a torque transmission contact portion is formed between the two disks, and between the two disks by the pressing means When the pressure is released, torque transmission is interrupted by the elastic restoring force of both disks.

このマルチディスク変速機構の出力軸に、出力用内歯ギヤ３１と噛合する図示しない出力ピニオンが固設されている。したがって、電動モータ２の回転は、変速機構３でトルク伝達接触部の位置（ディスクの径方向位置）に応じた変速比で変速されて出力ピニオンから出力用内歯ギヤ３１に出力される。   An output pinion (not shown) that meshes with the output internal gear 31 is fixed to the output shaft of the multi-disc transmission mechanism. Accordingly, the rotation of the electric motor 2 is shifted by the speed change mechanism 3 at a speed change ratio corresponding to the position of the torque transmission contact portion (the radial position of the disk) and output from the output pinion to the output internal gear 31.

換言すると、マルチディスク変速機構の入出力軸は前述の通り平行配置されているので、車軸中心ＣＬに沿って同軸配置されたモータ２の出力軸２１及び入力軸に対して出力軸は偏心して配置されることとなる。このため、マルチディスク変速機構は、比較的大きな径となる出力用内歯ギヤ３１と組み合わせる変速機構として好適である。   In other words, since the input / output shafts of the multi-disc transmission mechanism are arranged in parallel as described above, the output shaft is arranged eccentrically with respect to the output shaft 21 and the input shaft of the motor 2 arranged coaxially along the axle center CL. Will be. Therefore, the multi-disc transmission mechanism is suitable as a transmission mechanism combined with the output internal gear 31 having a relatively large diameter.

また、ベルト・プーリ式の無段変速機の場合は、両プーリの干渉を避けるために入出力軸間の距離を大きくする必要があるが、マルチディスク変速機構の場合、入出力軸間の距離をディスクの半径よりやや大きい程度とすれば良いので軸間距離を短く設定でき、インホイールモータ式駆動機構の変速機構として好適である。   In the case of a belt-pulley type continuously variable transmission, it is necessary to increase the distance between the input and output shafts in order to avoid interference between both pulleys. Can be set to be slightly larger than the radius of the disk, the distance between the axes can be set short, and it is suitable as a speed change mechanism for an in-wheel motor drive mechanism.

出力用内歯ギヤ３１とホイール１１のハブ１２とは、連結部材５によって動力連結されている。連結部材５は、出力用内歯ギヤ３１の外周部に動力連結される内歯ギヤ連結部位５１と、ハブ１２の車体中心側ＩＳに突出した凸部１２ａに動力連結されるホイールハブ連結部位５２と、これらの内歯ギヤ連結部位５１とホイールハブ連結部位５２とを結合する基部５３と備えている。   The output internal gear 31 and the hub 12 of the wheel 11 are power-connected by the connecting member 5. The connecting member 5 includes an internal gear connecting portion 51 that is power-connected to the outer peripheral portion of the output internal gear 31, and a wheel hub connecting portion 52 that is power-connected to the convex portion 12 a that protrudes toward the vehicle body center IS of the hub 12. And a base 53 that couples the internal gear coupling part 51 and the wheel hub coupling part 52 to each other.

内歯ギヤ連結部位５１は、出力用内歯ギヤ３１の外周部に沿った内周を有する円筒状に形成されている。ホイールハブ連結部位５２は、本実施形態では、内歯ギヤ連結部位５１の車体側方ＯＳから車軸中心ＣＬに向かうように延びた円板状に形成されたディスク状部分５２ａと、車軸中心ＣＬに沿って形成されたボス部５２ｂとを備えている。ハブ１２の凸部１２ａは孔部１２ｂを有する円環状に形成され、ハブ１２の凸部１２ａは、孔部１２ｂをボス部５２ｂに外嵌され、車体中心側ＩＳに向いた円環状の面１２ｃをディスク状部分５２ａに当接させ図示しないボルトの締結によって連結されている。   The internal gear coupling portion 51 is formed in a cylindrical shape having an inner periphery along the outer periphery of the output internal gear 31. In the present embodiment, the wheel hub connecting portion 52 is formed in a disc-like portion 52a formed in a disc shape extending from the vehicle body side OS of the internal gear connecting portion 51 toward the axle center CL, and the axle center CL. And a boss portion 52b formed along. The convex portion 12a of the hub 12 is formed in an annular shape having a hole portion 12b. The convex portion 12a of the hub 12 is fitted around the hole portion 12b on the boss portion 52b, and has an annular surface 12c facing the vehicle body center side IS. Are brought into contact with the disk-shaped portion 52a and connected by fastening bolts (not shown).

また、基部５３は、その主要部を円板状のホイールハブ連結部位５２よりも車体側方ＯＳに突出した円環状に形成されている。この基部５３の主要部の車体側方ＯＳへの突出は、ハブ１２の凸部１２ａの外周側の凹んだ空間に位置している。また、内歯ギヤ連結部位５１は、この基部５３から車体中心側ＩＳに突出するように形成されている。   In addition, the base 53 is formed in an annular shape with a main portion protruding from the disc-shaped wheel hub connecting portion 52 to the vehicle body side OS. Projection of the main portion of the base 53 toward the vehicle body side OS is located in a recessed space on the outer peripheral side of the convex portion 12 a of the hub 12. Further, the internal gear connecting portion 51 is formed so as to protrude from the base portion 53 to the vehicle body center side IS.

このような連結部材５の外周側に、出力用内歯ギヤ３１及びホイール１１をケーシング４に回転自在に支持する軸受６が配置されている。軸受６には、ボール６１と内輪６２と外輪６３とからなるボールベアリングが用いられている。本実施形態では、内輪６２が連結部材５の基部５３の外周側に基部５３と一体に形成されている。また、外輪６３は、ボルト４１によってケーシング４に結合固定されている。   A bearing 6 that rotatably supports the output internal gear 31 and the wheel 11 on the casing 4 is disposed on the outer peripheral side of the connecting member 5. As the bearing 6, a ball bearing including a ball 61, an inner ring 62, and an outer ring 63 is used. In the present embodiment, the inner ring 62 is formed integrally with the base 53 on the outer peripheral side of the base 53 of the connecting member 5. The outer ring 63 is coupled and fixed to the casing 4 with bolts 41.

軸受６は、軸方向位置（車軸の中心線ＣＬに沿った方向の位置）としては、出力用内歯ギヤ３１よりも車体側方ＯＳへシフトした位置、即ち、ハブ１２の外周側の空間内であって、且つ凸部１２ａの外周面にほぼ沿うような位置に配置されている。したがって、出力用内歯ギヤ３１及び内歯ギヤ連結部位５１の外周側には、空間が形成されている。本実施形態では、軸受６はボール６１を軸方向に１列のみ装備しており、軸受６の軸方向長さが抑えられているので、内歯ギヤ連結部位５１の外周側の空間が軸方向にも大きく確保されている。この空間内に制動機構７が配置されている。   The bearing 6 has an axial position (a position in the direction along the centerline CL of the axle) that is shifted to the vehicle side OS from the internal gear 31 for output, that is, in the space on the outer peripheral side of the hub 12. And it is arrange | positioned in the position which follows the outer peripheral surface of the convex part 12a substantially. Therefore, a space is formed on the outer peripheral side of the output internal gear 31 and the internal gear coupling portion 51. In the present embodiment, the bearing 6 is equipped with only one row of balls 61 in the axial direction, and the axial length of the bearing 6 is suppressed, so that the space on the outer peripheral side of the internal gear connecting portion 51 is axial. Is also secured. A braking mechanism 7 is disposed in this space.

制動機構７は、ボルト７６によって軸受６の外輪６３に固定されて回転規制されると共に内歯ギヤ連結部位５１を囲繞する円環状のシリンダ７１と、このシリンダ７１に内挿され、且つシリンダ７１の凹部（図示略）に嵌合する凸部（図示略）を有し、シリンダ７１の油室７２に供給される作動油の油圧（制動圧）に応じて、先端が軸方向（車軸の中心線ＣＬに沿った方向）にストロークする円環状のピストン７３と、軸受６の内輪６２に形成されたブレーキディスク面７４と、ピストン７３の先端に装備されたブレーキパッド７５と、を備えている。油室７２の油圧が高まればピストン７３の先端が車体側方ＯＳへストロークし、ブレーキパッド７５がブレーキディスク面７４に接触する。この結果、ブレーキパッド７５とブレーキディスク面７４との間の摩擦力は、ピストン７３、シリンダ７１を経て非回転側である外輪６３に伝達されて、内輪６２側に制動力を与えることとなる。
このように、シリンダ７１を内歯ギヤ連結部位５１の外周側に配置すると共に、軸受６の内輪６２の車体中心側ＩＳの側面をブレーキディスク面７４として利用することにより、内歯ギヤ連結部位５１の外周側の空間を効果的に利用することができ、装置の軸方向長さを短縮できることとなる。 The brake mechanism 7 is fixed to the outer ring 63 of the bearing 6 by a bolt 76 and is restricted in rotation. The brake mechanism 7 is inserted into the cylinder 71 and surrounds the internal gear connecting portion 51. It has a convex part (not shown) that fits into a concave part (not shown), and its tip is axial (centerline of the axle) according to the hydraulic pressure (braking pressure) of hydraulic oil supplied to the oil chamber 72 of the cylinder 71 An annular piston 73 that strokes in a direction along CL), a brake disc surface 74 formed on the inner ring 62 of the bearing 6, and a brake pad 75 that is provided at the tip of the piston 73. When the oil pressure in the oil chamber 72 increases, the tip of the piston 73 strokes toward the vehicle body side OS, and the brake pad 75 contacts the brake disc surface 74. As a result, the frictional force between the brake pad 75 and the brake disc surface 74 is transmitted to the outer ring 63 on the non-rotating side via the piston 73 and the cylinder 71, and gives a braking force to the inner ring 62 side.
As described above, the cylinder 71 is arranged on the outer peripheral side of the internal gear coupling portion 51 and the side surface of the inner ring 62 of the bearing 6 on the vehicle body center side IS is used as the brake disk surface 74, thereby the internal gear coupling portion 51. The space on the outer peripheral side can be effectively used, and the axial length of the apparatus can be shortened.

本実施形態では、外輪６３にシリンダ７１が装備されるが、シリンダ７１は軸受６の外輪６３側（非回転側）に装備されればよく、例えばケーシング４に装備してもよい。ブレーキディスク面７４も軸受６の内輪６２側に形成されていればよい。また、本実施形態では、シリンダ７１及びピストン７３が円環状に形成されるが、例えば一般的な円筒状のシリンダ７１及びピストン７３、或いは、円柱状のピストン７３のみを複数個に分割して内歯ギヤ連結部位５１の外側に沿って円形に断続配置してもよい。   In the present embodiment, the outer ring 63 is equipped with the cylinder 71, but the cylinder 71 may be equipped on the outer ring 63 side (non-rotating side) of the bearing 6, for example, on the casing 4. The brake disk surface 74 may also be formed on the inner ring 62 side of the bearing 6. In the present embodiment, the cylinder 71 and the piston 73 are formed in an annular shape. For example, the general cylindrical cylinder 71 and the piston 73 or only the columnar piston 73 is divided into a plurality of parts. It may be intermittently arranged in a circle along the outside of the tooth gear connecting portion 51.

ピストン７３が複数個に分割されれば油室７２も同様に分割することになるが、ピストン７３が円環状の場合、油室７２を円環状にするか、或いは、油室７２を複数個に分割して円形に断続配置し、円環状のピストン７３の背面に各油室７２内を軸方向に移動する個別ピストンを突設するようにしてもよい。   If the piston 73 is divided into a plurality of parts, the oil chamber 72 is divided in the same manner. However, if the piston 73 is annular, the oil chamber 72 is made annular or the oil chamber 72 is divided into a plurality of parts. It may be divided and arranged intermittently in a circular shape, and an individual piston that moves in the axial direction in each oil chamber 72 may protrude from the back surface of the annular piston 73.

なお、ピストン７３の内周及び外周には、油室７２内の作動油をシールするシールリング７７が装備され、ピストン７３の先端のブレーキパッド７５が装備される面にも、軸受６のボール６１の収容部内の潤滑油をシールするシールリング７８が装備される。さらに、軸受６の車体側方ＯＳにも、ボルト４１の締結によって外輪６３と共にケーシング４に結合固定されるブラケット８０を通じて、ボール６１の収容部内の潤滑油をシールするシールリング８１が装備される。   Note that a seal ring 77 that seals the hydraulic oil in the oil chamber 72 is provided on the inner periphery and outer periphery of the piston 73, and the ball 61 of the bearing 6 is also provided on the surface on which the brake pad 75 at the tip of the piston 73 is provided. A seal ring 78 is provided for sealing the lubricating oil in the housing portion. Further, the vehicle body side OS of the bearing 6 is also equipped with a seal ring 81 that seals the lubricating oil in the housing portion of the ball 61 through a bracket 80 that is coupled and fixed to the casing 4 together with the outer ring 63 by fastening the bolt 41.

〔作用及び効果〕
本発明の一実施形態にかかる車輪の駆動制動装置は、上述のように構成されているので、ホイール１１のハブ１２の車体中心側に突出した凸部１２ａの外径が大きい場合にも、装置の軸方向寸法の増大及び装置の径方向寸法の増大を抑制することができる。 [Action and effect]
Since the wheel drive braking device according to the embodiment of the present invention is configured as described above, the device can be used even when the outer diameter of the convex portion 12a protruding toward the vehicle body center of the hub 12 of the wheel 11 is large. An increase in the axial dimension and an increase in the radial dimension of the apparatus can be suppressed.

つまり、動力伝達機構３Ａの出力用内歯３１とホイール１１のハブ１２とを動力連結する連結部材５を、これらの外周側に配置しているので、装置の軸方向寸法の増大を抑制することができる。   That is, since the connecting member 5 that power-connects the output internal teeth 31 of the power transmission mechanism 3A and the hub 12 of the wheel 11 is disposed on the outer peripheral side thereof, an increase in the axial dimension of the device is suppressed. Can do.

また、連結部材５を外周側に配置し、連結部材５の外周側に軸受６を配置し、さらに軸受６の外周側に制動機構７を配置すると、装置の径方向寸法の増大を招いてしまうが、軸受６と制動機構７とを、連結部材５の外周側において車軸方向（軸中心ＣＬの方向）に沿って並べて配設しているので、軸受６の径をある程度拡大しても装置の径方向寸法の増大を抑制することができる。   Further, if the connecting member 5 is disposed on the outer peripheral side, the bearing 6 is disposed on the outer peripheral side of the connecting member 5, and further the braking mechanism 7 is disposed on the outer peripheral side of the bearing 6, an increase in the radial dimension of the device is caused. However, since the bearing 6 and the brake mechanism 7 are arranged side by side along the axle direction (the direction of the axis center CL) on the outer peripheral side of the connecting member 5, even if the diameter of the bearing 6 is increased to some extent, An increase in the radial dimension can be suppressed.

軸受６の径を拡大すれば、軸受６の内周側のスペースが拡径するので、このスペースを利用して外径が大きい凸部１２ａを収容することができる。近年、ホイール１１のハブ１２の凸部１２ａが拡径〔例えばホイール１１の最大外径（リム径）の半分程度まで拡径〕されたものが増加しているが、このようなホイール１１であっても装着可能になる。   If the diameter of the bearing 6 is increased, the space on the inner peripheral side of the bearing 6 is increased, so that the convex portion 12a having a large outer diameter can be accommodated using this space. In recent years, the number of protrusions 12a of the hub 12 of the wheel 11 whose diameter has been increased (for example, increased to about half the maximum outer diameter (rim diameter) of the wheel 11) has increased. Even it can be installed.

また、軸受６の径を拡大すれば、軸受６の個々のボール６１の荷重負担が軽減されるので、本実施形態のように軸受のボール６１を軸方向に１列のみとすることや、ボール６１を軸方向に複数装備する場合もボール６１のサイズを小型化でき、軸受６の軸方向長さを抑えることができるため、内歯ギヤ連結部位５１の外周側の空間を軸方向にも大きく確保でき、これによっても、軸受６と制動機構７とを車軸方向に沿って並設することを可能としている。   Further, if the diameter of the bearing 6 is increased, the load burden on the individual balls 61 of the bearing 6 is reduced, so that the bearing balls 61 are arranged in only one row in the axial direction as in the present embodiment, Even when a plurality of 61 are provided in the axial direction, the size of the ball 61 can be reduced and the axial length of the bearing 6 can be reduced, so that the space on the outer peripheral side of the internal gear connecting portion 51 is also increased in the axial direction. This also makes it possible to arrange the bearing 6 and the braking mechanism 7 side by side along the axle direction.

〔その他〕
以上、本発明の実施形態を説明したが、本発明は上記実施形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲で、上記実施形態の構成の一部を適用したり、上記実施形態の構成を適宜変更して実施したりすることができる。 [Others]
As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, A part of structure of the said embodiment is applied in the range which does not deviate from the meaning of this invention, or the said The configuration of the embodiment can be changed as appropriate.

例えば、上記実施形態では、動力伝達機構３Ａに、マルチディスク変速機構を装備する例を説明したが、限られたスペースに収容可能なコンパクトな変速機構であればいずれの方式のものでもよい。   For example, in the above-described embodiment, the example in which the power transmission mechanism 3A is equipped with the multi-disc transmission mechanism has been described. However, any system may be used as long as it is a compact transmission mechanism that can be accommodated in a limited space.

また、変速機構ではなく減速機構を装備してもよい。この場合、例えば、ダブルピニオンタイプの遊星歯車機構を用いて、遊星歯車機構の内歯車（リングギヤ）に実施形態で説明した内歯ギヤ３１を適用して、キャリヤを固定し、太陽歯車を減速機構の入力部とし、内歯車を減速機構の出力部として、減速機構を構成することもできる。このような構成の場合、図１に示す変速機構が省略されるため、装置の軸方向寸法を大幅に抑制することができる。   Further, a speed reduction mechanism may be provided instead of the speed change mechanism. In this case, for example, by using the double pinion type planetary gear mechanism, the internal gear 31 described in the embodiment is applied to the internal gear (ring gear) of the planetary gear mechanism, the carrier is fixed, and the sun gear is reduced to the speed reduction mechanism. The speed reduction mechanism can also be configured by using the internal gear as the output part of the speed reduction mechanism. In the case of such a configuration, the speed change mechanism shown in FIG. 1 is omitted, so that the axial dimension of the apparatus can be greatly suppressed.

また、上記実施形態では、連結部材５に軸受６の内輪６２を一体形成して、連結部材５と内輪６２とを同一部材としているが、内輪６２を連結部材５とは別部材として、連結部材５と一体に連結するように構成してもよい。連結部材５の断面形状も、上記実施形態のものはその一例であり適宜変更可能である。   In the above embodiment, the inner ring 62 of the bearing 6 is formed integrally with the connecting member 5, and the connecting member 5 and the inner ring 62 are the same member, but the inner ring 62 is a separate member from the connecting member 5. You may comprise so that it may connect with 5 integrally. The cross-sectional shape of the connecting member 5 is also an example of the above embodiment and can be changed as appropriate.

１ 車輪
２ 駆動用の電動モータ
３Ａ 動力伝達機構
３ 変速機構
４ ケーシング（アクスルケース）
５ 連結部材
６ 軸受
７ 制動機構
１１ ホイール
１２ ホイール１１のハブ
１２ａ ハブ１２の凸部
１２ｂ 凸部１２ａの孔部
２１ 電動モータ２の出力軸
３１ 出力用内歯ギヤ
４１ ボルト
５１ 連結部材５の内歯ギヤ連結部位
５２ 連結部材５のホイールハブ連結部位
５２ａ ホイールハブ連結部位５２のディスク状部分
５２ｂ ホイールハブ連結部位５２のボス部
５３ 連結部材５の基部
６１ ボール
６２ 内輪
６３ 外輪
７１ シリンダ
７２ 油室
７３ ピストン
７４ ブレーキディスク面
７５ ブレーキパッド
７６ ボルト
７７，７８ シールリング
８０ ブラケット
８１ シールリング
ＣＬ 車軸中心
ＩＳ 車体中心側（車体内側）
ＯＳ 車体側方（車体外側） DESCRIPTION OF SYMBOLS 1 Wheel 2 Electric motor for drive 3A Power transmission mechanism 3 Speed change mechanism 4 Casing (axle case)
DESCRIPTION OF SYMBOLS 5 Connection member 6 Bearing 7 Braking mechanism 11 Wheel 12 Hub 11 of wheel 11 12a Convex part of hub 12 12b Hole part of convex part 12a 21 Output shaft of electric motor 2 31 Internal gear for output 41 Bolt 51 Internal tooth of connection member 5 Gear connecting portion 52 Wheel hub connecting portion 52 of connecting member 5a Disc-shaped portion 52b of wheel hub connecting portion 52 Boss portion of wheel hub connecting portion 52 53 Base portion of connecting member 5 61 Ball 62 Inner ring 63 Outer ring 71 Cylinder 72 Oil chamber 73 Piston 74 Brake disc surface 75 Brake pad 76 Bolt 77, 78 Seal ring 80 Bracket 81 Seal ring CL Center of axle IS Vehicle center side (vehicle body inside)
OS Side of vehicle body (outside of vehicle body)

Claims (3)

電動車両に装備された車輪のホイールにインホイール式に装備された駆動用の電動モータと、前記ホイールと前記電動モータとの間に介装されると共に前記ホイールに連結された出力用内歯ギヤを有し回転速度を変更可能な動力伝達機構と、前記車両の車体に前記ホイールを回転自在に支持する軸受と、前記ホイールに制動力を付与する制動機構とを備えた、車輪の駆動制動装置であって、
前記電動モータ，前記動力伝達機構，及び前記ホイールのハブが、前記車輪の車軸方向に沿って車体中心側から車体側方に向けてこの順に配置され、
前記出力用内歯ギヤと前記ハブとが前記車軸方向に沿って隣接し、前記出力用内歯ギヤの外周部と前記ハブとを動力連結する連結部材が装備され、
前記軸受及び前記制動機構は、前記連結部材の外周側において、前記車軸方向に沿って並設されている
ことを特徴とする、車輪の駆動制動装置。 An electric motor for driving mounted in-wheel on a wheel of a wheel mounted on an electric vehicle, and an internal gear for output interposed between the wheel and the electric motor and connected to the wheel And a power transmission mechanism capable of changing a rotational speed, a bearing that rotatably supports the wheel on a vehicle body of the vehicle, and a braking mechanism that applies a braking force to the wheel. Because
The electric motor, the power transmission mechanism, and the wheel hub are arranged in this order from the vehicle body center side to the vehicle body side along the axle direction of the wheel,
The output internal gear and the hub are adjacent to each other along the axle direction, and a connecting member that power-connects the outer peripheral portion of the output internal gear and the hub is equipped.
The wheel drive braking device according to claim 1, wherein the bearing and the braking mechanism are arranged in parallel along the axle direction on an outer peripheral side of the connecting member. 前記連結部材に、前記軸受の内輪が形成されている
ことを特徴とする、請求項１記載の車輪の駆動制動装置。 The wheel driving and braking device according to claim 1, wherein an inner ring of the bearing is formed on the connecting member. 前記制動機構は、前記軸受の外輪側に装備されたシリンダと、前記シリンダに内挿され前記シリンダに供給される制動圧に応じて先端が突出するピストンと、前記軸受の内輪の車体中心側に形成されたブレーキディスク面と、を備えている
ことを特徴とする、請求項１又は２記載の車輪の駆動制動装置。 The brake mechanism includes a cylinder mounted on the outer ring side of the bearing, a piston that is inserted into the cylinder and projects a tip in response to a brake pressure supplied to the cylinder, and on the vehicle body center side of the inner ring of the bearing. Formed brake disc surface, and
The wheel drive braking device according to claim 1, wherein the wheel drive brake device is provided.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108099583A (en) * 2018-01-17 2018-06-01 贵州苏佳乐电动车有限公司 A kind of built-in motor driving wheel of electric car
CN108843709A (en) * 2018-09-03 2018-11-20 夏长江 A kind of vehicle bridge, brake apparatus and vehicle

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006248273A (en) * 2005-03-08 2006-09-21 Honda Motor Co Ltd Wheel drive device for vehicle
JP2010025263A (en) * 2008-07-22 2010-02-04 Toyota Motor Corp Vehicle drive device
JP2011517638A (en) * 2008-04-11 2011-06-16 ソシエテ ド テクノロジー ミシュラン Electric hub for cars with electric drive
JP2013082321A (en) * 2011-10-11 2013-05-09 Toyota Motor Corp Wheel braking and driving apparatus
KR20130063795A (en) * 2011-12-07 2013-06-17 주식회사 센트랄 In-wheel driving system for motor vehicle
JP2013163401A (en) * 2012-02-09 2013-08-22 Nsk Ltd Driving unit
JP2015507147A (en) * 2011-12-07 2015-03-05 セントラル コーポレーションＣｅｎｔｒａｌ Ｃｏｒｐｏｒａｔｉｏｎ Transmission, in-wheel drive system for vehicle including the same, and method for manufacturing transmission

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006248273A (en) * 2005-03-08 2006-09-21 Honda Motor Co Ltd Wheel drive device for vehicle
JP2011517638A (en) * 2008-04-11 2011-06-16 ソシエテ ド テクノロジー ミシュラン Electric hub for cars with electric drive
JP2010025263A (en) * 2008-07-22 2010-02-04 Toyota Motor Corp Vehicle drive device
JP2013082321A (en) * 2011-10-11 2013-05-09 Toyota Motor Corp Wheel braking and driving apparatus
KR20130063795A (en) * 2011-12-07 2013-06-17 주식회사 센트랄 In-wheel driving system for motor vehicle
JP2015507147A (en) * 2011-12-07 2015-03-05 セントラル コーポレーションＣｅｎｔｒａｌ Ｃｏｒｐｏｒａｔｉｏｎ Transmission, in-wheel drive system for vehicle including the same, and method for manufacturing transmission
JP2013163401A (en) * 2012-02-09 2013-08-22 Nsk Ltd Driving unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108099583A (en) * 2018-01-17 2018-06-01 贵州苏佳乐电动车有限公司 A kind of built-in motor driving wheel of electric car
CN108843709A (en) * 2018-09-03 2018-11-20 夏长江 A kind of vehicle bridge, brake apparatus and vehicle

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