JP6079674B2 - Vehicle rear wheel drive mounting structure - Google Patents
Vehicle rear wheel drive mounting structure Download PDFInfo
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Description
本発明は、車両の後輪駆動装置取付構造に関し、特にパワーユニットの駆動力を後輪駆動装置に伝達するプロペラシャフトを備えた車両の後輪駆動装置取付構造に関する。 The present invention relates to a vehicle rear wheel drive device mounting structure, and more particularly to a vehicle rear wheel drive device mounting structure including a propeller shaft that transmits a driving force of a power unit to a rear wheel drive device.
従来より、フロントエンジン・リヤドライブ（ＦＲ）車や四輪駆動（４ＷＤ）車は、パワーユニットとしてのエンジンが車体前部に配設され、このエンジンの駆動力を前後方向に延びるプロペラシャフトを介して車体後部の後輪駆動装置（差動装置）に伝達している。
一般に、前突の場合、車体前部に設けられたエンジンを後方へ変位させて車体前部を圧壊させることにより、乗員へ作用する衝撃力を緩和している。
ＦＲ車や４ＷＤ車では、後輪駆動装置を支持する振動吸収機能付きマウント部材が車体側部材に固定されているため、エンジンがプロペラシャフトによって後方から突っ張られた状態になり、エンジンの後方変位が阻害されるという問題があった。
そこで、エンジンの後方変位の阻害防止を図る種々の技術が提案されている。
Conventionally, a front engine / rear drive (FR) vehicle and a four-wheel drive (4WD) vehicle have an engine as a power unit disposed at the front of the vehicle body, and a propeller shaft that extends the driving force of the engine in the front-rear direction. It is transmitted to the rear wheel drive device (differential device) at the rear of the vehicle body.
In general, in the case of a front collision, an impact force acting on an occupant is mitigated by displacing an engine provided at the front part of the vehicle body to crush the vehicle body front part.
In FR and 4WD vehicles, the mount member with vibration absorbing function that supports the rear wheel drive device is fixed to the vehicle body side member, so that the engine is stretched from the rear by the propeller shaft, and the rear displacement of the engine is reduced. There was a problem of being obstructed.
Therefore, various techniques for preventing the rearward displacement of the engine have been proposed.
特許文献１の車両の後輪駆動装置は、車体前部に設けられたエンジンと、車体後部に設けられた差動装置と、エンジンの駆動力を差動装置に伝達するプロペラシャフトと、プロペラシャフトを中間部よりも差動装置側の位置で車体側部材に対して回転可能に支持する中間支持部とを備え、プロペラシャフトは、自在継手を介して後側が前側に対して短くなるように前後に分割され、車体変形に伴いエンジンと差動装置とが近接方向に変位する場合、自在継手の一部と前後分割プロペラシャフトの何れか一方が他方の分割プロペラシャフトの端部内に所定範囲に亙って嵌入されることにより縮小可能に構成され、差動装置は、装置本体とプロペラシャフトとの連結部に対して上側後部を支持して近接方向の変位時に装置本体の前部が下方に回動するように支持する後側支持部を有している。 A vehicle rear wheel drive device disclosed in Patent Document 1 includes an engine provided at a front portion of a vehicle body, a differential device provided at a rear portion of the vehicle body, a propeller shaft that transmits driving force of the engine to the differential device, and a propeller shaft. And an intermediate support portion that rotatably supports the vehicle body side member at a position closer to the differential device than the intermediate portion, and the propeller shaft is front and rear so that the rear side is shorter than the front side via a universal joint. When the engine and the differential gear are displaced in the proximity direction as the vehicle body is deformed, either one of the universal joint or the front and rear split propeller shafts is placed within a predetermined range within the end of the other split propeller shaft. The differential device is configured to be able to be reduced by being inserted, and the differential device supports the upper rear portion with respect to the connection portion between the device main body and the propeller shaft, and the front portion of the device main body rotates downward when displaced in the proximity direction. Movement And a side support portion after supporting the so that.
図１２において、仮想線が車両前突前の差動装置の状態を示し、実線が車両前突後の差動装置の状態を示している。
図１２の実線に示すように、特許文献１の車両の後輪駆動装置によれば、車両前突時、前側分割シャフト８１に軸方向の衝撃荷重が入力され、前側分割シャフト８１が中間支持部８３を破壊して後退する。前側分割シャフト８１の後退に伴い、前側分割シャフト８１が後側分割シャフト８２内に嵌入し、プロペラシャフト８０が縮小して一本のプロペラシャフト８０として機能する。そして、縮小後のプロペラシャフト８０に更に後方向の荷重が入力された場合、荷重はプロペラシャフト８０を通じて差動装置８４へ入力され、左右１対の前側支持部が破断された差動装置８４は後側支持部を回動中心にして前部が下方に回動する。これにより、プロペラシャフト８０を備えた車両であっても、前突のエンジンの後方変位を実現できる。
In FIG. 12, the phantom line indicates the state of the differential device before the vehicle front collision, and the solid line indicates the state of the differential device after the vehicle front collision.
As shown by the solid line in FIG. 12, according to the vehicle rear wheel drive device of Patent Document 1, an axial impact load is input to the front split shaft 81 at the time of front collision of the vehicle, and the front split shaft 81 is an intermediate support portion. Destroy 83 and move backward. As the front split shaft 81 is retracted, the front split shaft 81 is fitted into the rear split shaft 82, and the propeller shaft 80 is reduced to function as a single propeller shaft 80. When a further backward load is inputted to the reduced propeller shaft 80, the load is inputted to the differential device 84 through the propeller shaft 80, and the differential device 84 in which the pair of left and right front support portions is broken is obtained. The front part pivots downward with the rear support part as the pivot center. Thereby, even if it is a vehicle provided with the propeller shaft 80, the rearward displacement of the front-end engine can be realized.
特許文献１の車両の後輪駆動装置は、衝撃荷重によって破断される左右１対の前側支持部の両方の前側マウント部材と、下方回動中心になる後側支持部の後側マウント部材との３点で車体側部材に支持されている。
左右１対の前側マウント部材はプロペラシャフトの軸心に対して略線対称に配置され、各々が前側取付ブラケットによって車体側部材に固定されているため、個々の前側マウント部材は略均等配分された荷重を支持でき、支持剛性を確保することができる。
一方、後側マウント部材は後輪駆動装置における下方への回動中心であることから、支持数を増加することが難しく、また、重心調整等の設計条件から、プロペラシャフトの軸心に対して車幅方向一側へオフセットした位置に単一の後側マウント部材を取付ブラケットを介して固定している。
The vehicle rear-wheel drive device disclosed in Patent Document 1 includes both front mount members of a pair of left and right front support portions that are broken by an impact load, and a rear mount member of a rear support portion that is a center of downward rotation. It is supported by the vehicle body side member at three points.
The pair of left and right front mounting members are arranged substantially line-symmetrically with respect to the axis of the propeller shaft, and each is fixed to the vehicle body side member by the front mounting bracket, so that the individual front mounting members are substantially evenly distributed. The load can be supported and the support rigidity can be secured.
On the other hand, since the rear mounting member is the center of downward rotation in the rear wheel drive device, it is difficult to increase the number of supports, and from the design conditions such as the center of gravity adjustment, the axis of the propeller shaft A single rear mount member is fixed via a mounting bracket at a position offset to one side in the vehicle width direction.
しかし、特許文献１の車両の後輪駆動装置では、後側マウント部材がプロペラシャフト８０の軸心に対して車幅方向一側へオフセットされているため、車両前突時におけるプロペラシャフト８０及び差動装置８４の挙動には車幅方向での差異が発生する。
同文献のマルチリンク式サスペンションにおいては、後側マウント部材をリヤサスフレームに設置しているが、差動装置の後方にリヤサスフレームを持たないサスペンション形式(例えばトーションビーム形式)においては、通常、図１３に示すように、後側支持機構の構成部材である後側マウント部材９３がは、差動装置８４の後端部に形成された後側マウント連結部９１に後側ボルト部材９２を介して取り付けられ、この後側マウント部材９３が車体側部材(例えば車体フロア下面)に取付ブラケット９４を介して固定されている。
車両前突時、図１４に示すように、プロペラシャフト８０に後方へ向かう荷重が入力された場合、後側マウント部材９３がプロペラシャフト８０の軸心に対して車幅方向一側へオフセットされているため、後側マウント部材９３には斜め後方へ向かう荷重が作用することから、後側ボルト部材９２に車幅方向外側へ向かう分力が作用する。この分力が後側ボルト部材９２の強度を越えた場合、後側ボルト部材９２が破断する。
このとき、マルチリンク式リヤサスペンションの場合は、後側ボルト部材が破断しても、差動装置８４がその直後で車幅方向に延在するリヤサスフレームで受け止められることにより、大きく車幅方向に変位することはない。他方、リヤサスフレームを持たないサスペンション形式では、差動装置８４が車幅方向外側に逸脱するため、差動装置８４の下方回動に必要な曲げモーメントが減少し、差動装置８４が十分に下方回動できない虞がある。
However, in the rear wheel drive device of the vehicle disclosed in Patent Document 1, the rear mount member is offset to one side in the vehicle width direction with respect to the axis of the propeller shaft 80. A difference in the vehicle width direction occurs in the behavior of the moving device 84.
In the multi-link suspension of the same document, the rear mount member is installed on the rear suspension frame. However, in the suspension type (for example, the torsion beam type) that does not have the rear suspension frame behind the differential unit, usually, as shown in FIG. As shown, a rear mount member 93 that is a constituent member of the rear support mechanism is attached to a rear mount connecting portion 91 formed at the rear end portion of the differential device 84 via a rear bolt member 92. The rear mount member 93 is fixed to a vehicle body side member (for example, the lower surface of the vehicle body floor) via a mounting bracket 94.
As shown in FIG. 14, when a rearward load is input to the propeller shaft 80, the rear mount member 93 is offset to one side in the vehicle width direction with respect to the axis of the propeller shaft 80 as shown in FIG. Therefore, a load directed obliquely rearward acts on the rear mount member 93, and a component force directed outward in the vehicle width direction acts on the rear bolt member 92. When this component force exceeds the strength of the rear bolt member 92, the rear bolt member 92 is broken.
At this time, in the case of the multi-link type rear suspension, even if the rear bolt member is broken, the differential device 84 is received by the rear suspension frame extending in the vehicle width direction immediately after that, so that it is greatly increased in the vehicle width direction. There is no displacement. On the other hand, in the suspension type having no rear suspension frame, the differential device 84 deviates outward in the vehicle width direction, so that the bending moment required for the downward rotation of the differential device 84 is reduced, and the differential device 84 is sufficiently lowered. There is a possibility that it cannot rotate.
本発明の目的は、車両前突時における後輪駆動装置による下方回動を確実に実現でき、乗員への衝撃を軽減できる車両の後輪駆動装置取付構造等を提供することである。 An object of the present invention is to provide a vehicle rear wheel drive device mounting structure and the like that can surely realize a downward rotation by a rear wheel drive device at the time of a vehicle front collision and can reduce an impact on an occupant.
請求項１の車両の後輪駆動装置取付構造は、車体後部に設けられた後輪駆動装置と、車体前部に設けられたパワーユニットの駆動力を前記後輪駆動装置に伝達する車体前後方向に延びるプロペラシャフトとを備えた車両の後輪駆動装置取付構造において、前記後輪駆動装置の後端部に前記プロペラシャフトの軸心に対して車幅方向と上下方向にオフセットさせて設けられたマウント連結部と、前記マウント連結部の後端部から後方へ延びるボルト部材と、前記ボルト部材の後端側部分に略同軸状態で取り付けられたマウント部材と、前記マウント部材を車体側部材に固定する取付ブラケットとを備え、前記取付ブラケットが前記マウント連結部の後端部に側面視において部分的に重なり合うように形成されたことを特徴としている。 The vehicle rear wheel drive device mounting structure according to claim 1 is provided in a vehicle front-rear direction that transmits a drive force of a rear wheel drive device provided at the rear of the vehicle body and a power unit provided at the front of the vehicle body to the rear wheel drive device. In a vehicle rear wheel drive device mounting structure including a propeller shaft that extends, the mount is provided at the rear end of the rear wheel drive device so as to be offset in the vehicle width direction and the vertical direction with respect to the axis of the propeller shaft. A connecting portion, a bolt member extending rearward from a rear end portion of the mount connecting portion, a mount member attached in a substantially coaxial state to a rear end side portion of the bolt member, and fixing the mount member to the vehicle body side member A mounting bracket, and the mounting bracket is formed so as to partially overlap the rear end portion of the mount connecting portion in a side view.
この車両の後輪駆動装置取付構造では、後輪駆動装置の後端部にプロペラシャフトの軸心に対して車幅方向と上下方向にオフセットさせて設けられたマウント連結部と、このマウント連結部の後端部から後方へ延びるボルト部材の後端側部分に略同軸状態で取り付けられたマウント部材と、マウント部材を車体側部材に固定する取付ブラケットとを備えるため、車両前突時、後輪駆動装置による下方回動を実行することができる。
取付ブラケットがマウント連結部の後端部に側面視において部分的に重なり合うように形成されているため、ボルト部材に車幅方向外側へ向かう分力が作用してボルト部材が破断しても、マウント連結部の後端部の車幅方向の移動を取付ブラケットによって規制し、その結果、後輪駆動装置の車幅方向の逸脱を防止して、後輪駆動装置による下方回動を確実に実現することができ、乗員への衝撃を軽減できる。
In this vehicle rear wheel drive device mounting structure, a mount coupling portion provided at the rear end portion of the rear wheel drive device offset in the vehicle width direction and the vertical direction with respect to the axis of the propeller shaft, and the mount coupling portion The rear wheel is provided with a mounting member that is mounted substantially coaxially on the rear end portion of the bolt member that extends rearward from the rear end portion, and a mounting bracket that fixes the mounting member to the vehicle body side member. A downward rotation by the driving device can be executed.
Since the mounting bracket is formed so as to partially overlap the rear end of the mount connecting portion in a side view, even if the bolt member breaks due to the component force acting outward in the vehicle width direction on the bolt member, the mount The movement of the rear end portion of the connecting portion in the vehicle width direction is restricted by the mounting bracket, and as a result, the rear wheel drive device is prevented from deviating in the vehicle width direction and the downward rotation by the rear wheel drive device is reliably realized. Can reduce the impact on the passenger.
請求項２の発明は、請求項１の発明において、前記マウント連結部は、前記プロペラシャフトの回転に起因した力が車体側部材に上方向きに作用するように配設され、前記取付ブラケットの車幅方向外側部分に前記マウント連結部と重なり合う延長部を設けたことを特徴としている。
この場合、プロペラシャフトの軸心回りの回転に起因した力を利用してマウント部材の支持剛性を向上できると共に延長部の追加のみで逸脱防止と下方回動の実現との両立を図ることができる。
According to a second aspect of the present invention, in the first aspect of the invention, the mount connecting portion is disposed so that a force caused by the rotation of the propeller shaft acts upward on the vehicle body side member, An extension portion that overlaps with the mount coupling portion is provided on the outer portion in the width direction.
In this case, it is possible to improve the support rigidity of the mount member by using the force resulting from the rotation around the axis of the propeller shaft, and to achieve both the prevention of deviation and the realization of the downward rotation only by adding the extension. .
請求項３の発明は、請求項１又は２の発明において、前記後輪駆動装置の前側部分から車幅方向外側へ夫々延びる左右１対の前側マウント連結部と、前記左右１対の前側マウント連結部に軸心が車体前後方向に延びるように夫々支持された左右１対の前側マウント部材と、前記左右１対の前側マウント部材を左右１対の前側ボルト部材を介して車体側部材に夫々固定する左右１対の前側取付ブラケットとを備えたことを特徴としている。
これにより、３点支持の後輪駆動装置において、車両前突時におけるプロペラシャフト及び後輪駆動装置による狙いの挙動を実現できる。
According to a third aspect of the present invention, in the first or second aspect of the present invention, a pair of left and right front mount connecting portions extending from the front portion of the rear wheel drive device outward in the vehicle width direction, and the pair of left and right front mount connections. A pair of left and right front mounting members, each of which is supported so that the shaft center extends in the longitudinal direction of the vehicle body, and the pair of left and right front mounting members are fixed to the vehicle body side member via a pair of left and right front bolt members, respectively. And a pair of left and right front mounting brackets.
Thereby, in the three-point supported rear wheel drive device, it is possible to realize the targeted behavior by the propeller shaft and the rear wheel drive device at the time of the vehicle front collision.
請求項４の発明は、請求項３の発明において、前記左右１対の前側取付ブラケットは前記取付ブラケットよりも低い位置に固定されたことを特徴としている。
この場合、簡単な構成で後輪駆動装置による下方回動を確実に実現することができる。
The invention of claim 4 is characterized in that, in the invention of claim 3, the pair of left and right front mounting brackets is fixed at a position lower than the mounting bracket.
In this case, it is possible to reliably realize the downward rotation by the rear wheel drive device with a simple configuration.
本発明の車両の後輪駆動装置取付構造によれば、車両前突時における後輪駆動装置による下方回動を確実に実現でき、乗員への衝撃を軽減することができる。 According to the vehicle rear wheel drive device mounting structure of the present invention, it is possible to reliably realize the downward rotation by the rear wheel drive device at the time of vehicle front collision, and to reduce the impact on the occupant.
以下、本発明の実施形態を図面に基づいて詳細に説明する。
以下の説明は、本発明を本質的に例示に過ぎず、本発明、その適用物あるいはその用途を制限するものではない。尚、図において矢印Ｆは前方向を示し、矢印Ｌは左方向を示している。
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
The following description is merely illustrative of the present invention and does not limit the present invention, its application, or its use. In the figure, arrow F indicates the forward direction, and arrow L indicates the left direction.
図１に示すように、本実施形態では、車体後部に設けられた差動装置１（後輪駆動装置）と、車体前部に設けられたエンジン３を含むパワーユニット２の駆動力を差動装置１に伝達する前後方向に延びるプロペラシャフト５とを備えたフロントエンジン・リヤドライブ（ＦＲ）車両Ｖについて説明する。
パワーユニット２は、駆動力を発生するエンジン３と、このエンジン３とプロペラシャフト５との間に介在する変速機４とを備え、エンジンマウント（図示略）等の取付手段によって車体前部に取り付けられている。
As shown in FIG. 1, in this embodiment, the differential device 1 (rear wheel drive device) provided at the rear of the vehicle body and the driving force of the power unit 2 including the engine 3 provided at the front portion of the vehicle body are used as the differential device. A front engine / rear drive (FR) vehicle V having a propeller shaft 5 extending in the front-rear direction that is transmitted to 1 will be described.
The power unit 2 includes an engine 3 that generates a driving force, and a transmission 4 that is interposed between the engine 3 and the propeller shaft 5. The power unit 2 is attached to the front portion of the vehicle body by attachment means such as an engine mount (not shown). ing.
まず、この車両Ｖの差動装置１が支持される車体後部構造について簡単に説明する。
図１，図２に示すように、車両Ｖの車体は、車室の床面を構成するフロアパネル１１と、左右１対のリヤサイドフレーム１２と、１対のリヤサイドフレーム１２間に亙って掛け渡されたＮｏ．４クロスメンバ１３と、このＮｏ．４クロスメンバ１３の後側にて１対のリヤサイドフレーム１２間に亙って掛け渡されたＮｏ．５クロスメンバ１４と、Ｎｏ．４クロスメンバ１３とＮｏ．５クロスメンバ１４間に亙って掛け渡された左右１対の縦メンバ１５と、これら左右１対の縦メンバ１５間に亙って掛け渡された補助メンバ１６と、この補助メンバ１６の前側において左右１対の縦メンバ１５間に亙って掛け渡された支持部材１７と、トーションビーム式サスペンション１９等を備えている。
First, a vehicle body rear structure on which the differential 1 of the vehicle V is supported will be briefly described.
As shown in FIGS. 1 and 2, the vehicle body of the vehicle V is hung between a floor panel 11 constituting a floor surface of a passenger compartment, a pair of left and right rear side frames 12, and a pair of rear side frames 12. No. passed 4 cross member 13 and this No. No. 4 is stretched across a pair of rear side frames 12 on the rear side of the cross member 13. 5 cross member 14, 4 cross member 13 and No. 4 5 A pair of left and right vertical members 15 spanned across the cross member 14, an auxiliary member 16 spanned across the pair of left and right vertical members 15, and the front side of the auxiliary member 16 , A support member 17 spanned between a pair of left and right vertical members 15, a torsion beam suspension 19, and the like.
フロアパネル１１は、車幅方向中央部分に前後方向に延びるトンネル部１１ｃを備えたフロントフロアパネル１１ａと、Ｎｏ．４クロスメンバ１３よりも後方でスペアタイヤパン１１ｄを有するリヤフロアパネル１１ｂとを備えている。スペアタイヤパン１１ｄの下方には、排気管６の後端に接続されたサイレンサ７が固定されている。 The floor panel 11 includes a front floor panel 11a having a tunnel portion 11c extending in the front-rear direction at a center portion in the vehicle width direction, A rear floor panel 11b having a spare tire pan 11d behind the four cross member 13; A silencer 7 connected to the rear end of the exhaust pipe 6 is fixed below the spare tire pan 11d.
左右１対のリヤサイドフレーム１２は、前後方向に延びて後方へオーバーハングするように形成されている。左右１対のリヤサイドフレーム１２間には、フロントフロアパネル１１ａの後端から後方上がり傾斜状に形成されたリヤフロアパネル１１ｂによってキックアップ部１８が形成され、このキックアップ部１８の頂部にＮｏ．４クロスメンバ１３が形成されている。尚、キックアップ部１８の下方には、燃料タンク８が配設されている。 The pair of left and right rear side frames 12 are formed so as to extend in the front-rear direction and overhang rearward. A kick-up portion 18 is formed between the pair of left and right rear side frames 12 by a rear floor panel 11b formed to be inclined rearward from the rear end of the front floor panel 11a. A four cross member 13 is formed. A fuel tank 8 is disposed below the kick-up portion 18.
次に、パワーユニット２の駆動力を差動装置１に伝達するプロペラシャフト５について説明する。
図１に示すように、プロペラシャフト５は、その前端部が変速機４の出力軸４ａに第１自在継手２３を介して連結されると共に、その後端部が差動装置１の入力軸３１ａに第２自在継手２４を介して連結されている。また、このプロペラシャフト５は、後側分割シャフト２２が前側分割シャフト２１に比べて短くなるように前後に２分割され、それら前後の分割シャフト２１，２２が第３自在継手２５を介して連結されることにより構成されている。
Next, the propeller shaft 5 that transmits the driving force of the power unit 2 to the differential device 1 will be described.
As shown in FIG. 1, the propeller shaft 5 has a front end connected to the output shaft 4 a of the transmission 4 via a first universal joint 23, and a rear end connected to the input shaft 31 a of the differential device 1. The second universal joint 24 is connected. The propeller shaft 5 is divided into two parts in the front-rear direction so that the rear divided shaft 22 is shorter than the front divided shaft 21, and the front and rear divided shafts 21 and 22 are connected via a third universal joint 25. It is constituted by.
図３に示すように、第３自在継手２５は、前側分割シャフト２１に連結された内輪２５ａと、後側分割シャフト２２に連結された外輪２５ｂと、これら内輪２５ａ及び外輪２５ｂの間に介装されて内外輪２５ａ，２５ｂ間でトルクを伝達するボール２５ｃと、内輪２５ａの外周面および外輪２５ｂの内周面との間に介在してボール２５ｃを保持するケージ２５ｄとを備えたダブルオフセット型ユニバーサルジョイントであり、前後の分割シャフト２１，２２の間の角度変位を許容する。 As shown in FIG. 3, the third universal joint 25 includes an inner ring 25a connected to the front divided shaft 21, an outer ring 25b connected to the rear divided shaft 22, and an inner ring 25a and an outer ring 25b. Double offset type comprising a ball 25c that transmits torque between the inner and outer rings 25a and 25b, and a cage 25d that is interposed between the outer peripheral surface of the inner ring 25a and the inner peripheral surface of the outer ring 25b and holds the ball 25c. It is a universal joint and allows angular displacement between the front and rear split shafts 21 and 22.
第３自在継手２５の内輪２５ａは、前側分割シャフト２１の後端部に配設されたロート状シャフト２１ａの縮径端部に供回りするように外嵌連結されている。このロート状シャフト２１ａは、前側分割シャフト２１の後端部に設けられた縮径部２１ｂに連結されている。一方、外輪２５ｂは、後側分割シャフト２２内にその前端縁から退入した位置に供回りするように内嵌連結されている。
これにより、車両前突時、前側分割シャフト２１の嵌入動作の初期においてロート状シャフト２１ａが内輪２５ａ、ボール２５ｃ及びケージ２５ｄと共に後側分割シャフト２２内に嵌入され、続いて前側分割シャフト２１の縮径部２１ｂが後側分割シャフト２２内に嵌入される。
The inner ring 25a of the third universal joint 25 is externally coupled so as to be connected to the reduced diameter end portion of the funnel-shaped shaft 21a disposed at the rear end portion of the front split shaft 21. The funnel-shaped shaft 21 a is connected to a reduced diameter portion 21 b provided at the rear end portion of the front divided shaft 21. On the other hand, the outer ring 25b is internally fitted and connected to the rear divided shaft 22 so as to go to a position retracted from the front end edge thereof.
Thus, at the time of the frontal collision of the vehicle, the funnel-shaped shaft 21a is fitted into the rear divided shaft 22 together with the inner ring 25a, the ball 25c and the cage 25d at the initial stage of the fitting operation of the front divided shaft 21, and then the front divided shaft 21 is contracted. The diameter portion 21 b is fitted into the rear divided shaft 22.
次に、差動装置１及びその車体に対する取付構造について説明する。
図２，図４〜図８に示すように、差動装置１は、前後輪間の差動を行う第１差動機構３１と、この第１差動機構３１の後側に連結され左右後輪間の差動を行う第２差動機構３２等を備えている。
第１差動機構３１の前端部には、入力軸３１ａが設けられ、この入力軸３１ａとプロペラシャフト５（後側分割シャフト２２）の後端部が第２自在継手２４を介して連結されている。
Next, the differential device 1 and its mounting structure with respect to the vehicle body will be described.
As shown in FIG. 2 and FIG. 4 to FIG. 8, the differential device 1 includes a first differential mechanism 31 that performs differential between front and rear wheels, and a rear side that is connected to the rear side of the first differential mechanism 31. A second differential mechanism 32 that performs differential between the wheels is provided.
An input shaft 31 a is provided at the front end portion of the first differential mechanism 31, and the input shaft 31 a and the rear end portion of the propeller shaft 5 (rear split shaft 22) are connected via a second universal joint 24. Yes.
第２差動機構３２は、左右１対のドライブシャフト９を回転駆動する駆動機構を収容した本体３２ａと、この本体３２ａの前端部から軸心Ｃに対して径方向外側へ張り出した張出し部３２ｂと、本体３２ａの左右両側の側壁から車幅方向外側へ突出した左右１対のボス部３２ｃと、第２差動機構３２を支持部材１７に固定する左右１対の前側支持機構４０と、第２差動機構３２を補助メンバ１６に固定する後側支持機構５０等を備えている。第２差動機構３２の前端部には、第１差動機構３１の後端部が複数のボルトによって締結されている。 The second differential mechanism 32 includes a main body 32a that houses a drive mechanism that rotationally drives the pair of left and right drive shafts 9, and a protruding portion 32b that protrudes radially outward from the front end of the main body 32a with respect to the axis C. A pair of left and right boss portions 32c protruding from the left and right side walls of the main body 32a outward in the vehicle width direction, a pair of left and right front support mechanisms 40 for fixing the second differential mechanism 32 to the support member 17, 2 A rear support mechanism 50 for fixing the differential mechanism 32 to the auxiliary member 16 is provided. The rear end portion of the first differential mechanism 31 is fastened to the front end portion of the second differential mechanism 32 by a plurality of bolts.
張出し部３２ｂは、本体３２ａの前端部分に設けられ、張出し部３２ｂの後側上部において車幅方向外側へ延びる左右１対の上側リブ部３３と、上側リブ部３３の下側において車幅方向外側へ延びる左右１対の中央リブ部３４と、中央リブ部３４の下側において車幅方向外側へ延びる左右１対の下側リブ部３５とを備えている。
左右１対の上側リブ部３３の後部には、本体３２ａの前側上半部から前方へ水平状に延びる補強部３３ａが夫々一体的に形成されている。左右１対の下側リブ部３５の後部には、左右１対のボス部３２ｃの前部から前方へ水平状に延びる補強部３５ａが夫々一体的に形成されている。
The overhang portion 32b is provided at the front end portion of the main body 32a, and a pair of left and right upper rib portions 33 extending outward in the vehicle width direction at the rear upper portion of the overhang portion 32b, and the vehicle width direction outer side under the upper rib portion 33. A pair of left and right central rib portions 34 extending to the left and a pair of left and right lower rib portions 35 extending outward in the vehicle width direction below the central rib portion 34 are provided.
Reinforcing portions 33a extending horizontally from the front upper half of the main body 32a to the front are integrally formed at the rear portions of the pair of left and right upper rib portions 33, respectively. Reinforcing portions 35a extending horizontally from the front of the pair of left and right boss portions 32c to the front are integrally formed at the rear of the pair of left and right lower rib portions 35, respectively.
右側の前側支持機構４０は、左側の前側支持機構４０と左右対称の構造であるため、左側の前側支持機構４０の構成について主に説明する。
前側支持機構４０は、第２差動機構３２に連結されたマウント連結部４１（前側マウント連結部）と、このマウント連結部４１に固定されたマウント部材４３（前側マウント部材）と、このマウント部材４３に連結された取付ブラケット４４とを備えている。マウント連結部４１は、正面視にて左側（車幅方向外側）に延びる略三角形状に形成され、前後方向に向かう所定値以上の荷重が作用したとき、破断するように構成されている。このマウント連結部４１は、右側の上側角部と下側角部が上側リブ部３３の左側端部と下側リブ部３５の左側端部にボルト４５，４５を介して夫々固定されている。
Since the right front support mechanism 40 has a symmetrical structure with the left front support mechanism 40, the configuration of the left front support mechanism 40 will be mainly described.
The front support mechanism 40 includes a mount connecting portion 41 (front mount connecting portion) connected to the second differential mechanism 32, a mount member 43 (front mount member) fixed to the mount connecting portion 41, and the mount member. And an attachment bracket 44 connected to the main body 43. The mount connecting portion 41 is formed in a substantially triangular shape extending to the left (outside in the vehicle width direction) when viewed from the front, and is configured to break when a load greater than a predetermined value in the front-rear direction is applied. The right and upper corners of the mount connecting portion 41 are fixed to the left end of the upper rib 33 and the left end of the lower rib 35 via bolts 45 and 45, respectively.
図６に示すように、マウント部材４３は、その軸心が前後方向に延びるようにマウント連結部４１の左側角部に固着されている。このマウント部材４３は、前後方向に向いて開口する外筒４３ａと、この外筒４３ａ内に収容されたマウントラバー４３ｂと、マウントラバー４３ｂの中心孔に嵌入される内筒４３ｃと、内筒４３ｃ内に挿入されたボルト部材４２等によって構成され、車体上下左右方向の振動をマウントラバー４３ｂによって吸収している。
取付ブラケット４４は、支持部材１７の下端から下方に延びるように形成され、支持部材１７に固定されている。取付ブラケット４４の下端部に、マウント部材４３に挿通されたボルト部材４２の前端部と後端部とが固定されている。
As shown in FIG. 6, the mount member 43 is fixed to the left corner of the mount connecting portion 41 so that its axis extends in the front-rear direction. The mount member 43 includes an outer cylinder 43a that opens in the front-rear direction, a mount rubber 43b that is accommodated in the outer cylinder 43a, an inner cylinder 43c that is fitted into the center hole of the mount rubber 43b, and an inner cylinder 43c. It is comprised by the bolt member 42 etc. which were inserted in the inside, and the vibration of a vehicle body up-down and left-right direction is absorbed by the mount rubber 43b.
The mounting bracket 44 is formed to extend downward from the lower end of the support member 17 and is fixed to the support member 17. A front end portion and a rear end portion of the bolt member 42 inserted through the mount member 43 are fixed to the lower end portion of the mounting bracket 44.
次に、後側支持機構５０について説明する。
後側支持機構５０は、本体３２ａを後側分割シャフト２２の連結部（第２自在継手２４に対応する部分）よりも上方位置で支持している。この後側支持機構５０は、第２差動機構３２の後端部に一体的に設けられたマウント連結部５１と、マウント連結部５１の後端部から後方へ延びるボルト部材５２と、このボルト部材５２の後端側部分に略同軸状態で取り付けられたマウント部材５３と、マウント部材５３を補助メンバ１６に固定する取付ブラケット５４とを備えている。
Next, the rear side support mechanism 50 will be described.
The rear support mechanism 50 supports the main body 32a at a position above the connecting portion (the portion corresponding to the second universal joint 24) of the rear divided shaft 22. The rear support mechanism 50 includes a mount connecting portion 51 provided integrally with a rear end portion of the second differential mechanism 32, a bolt member 52 extending rearward from the rear end portion of the mount connecting portion 51, and the bolt. A mounting member 53 attached to the rear end portion of the member 52 in a substantially coaxial state and a mounting bracket 54 for fixing the mounting member 53 to the auxiliary member 16 are provided.
図４〜図８に示すように、マウント連結部５１は、前後方向に延びる軸心を備えた略円柱状に形成され、第２差動機構３２の後端部から後方へ突出するように第２差動機構３２と一体形成されている。
このマウント連結部５１は、車両前突時等、本体３２ａが後方に変位した場合、本体３２ａの前部が下方に回動するような曲げモーメントを本体３２ａに対して付与するために、図５に示すように、プロペラシャフト５の軸心Ｃに対して上方にオフセットして配設されると共に、パワーユニット２に回転駆動されるプロペラシャフト５の回転に起因した力を補助メンバ１６に対して上向きに作用させるために、図４に示すように、プロペラシャフト５の軸心Ｃに対して左方にオフセットして配設されている。マウント連結部５１の外周部分のうち右側（車幅方向内側）部分は、補強部５１ａによって本体３２ａの側壁及び後側外周部分と連結補強され、マウント連結部５１の外周部分のうち左側（車幅方向外側）部分は、補強部５１ｂによって本体３２ａの側壁及び左側ボス部３２ｃと連結補強されている。
ボルト部材５２は、長尺状の棒状体であり、前端部がマウント連結部５１の後端部分に嵌装されている。
As shown in FIGS. 4 to 8, the mount connecting portion 51 is formed in a substantially columnar shape having an axial center extending in the front-rear direction, and protrudes backward from the rear end portion of the second differential mechanism 32. 2 is formed integrally with the differential mechanism 32.
When the main body 32a is displaced rearward such as when the vehicle collides with the front, the mount connecting portion 51 applies a bending moment to the main body 32a so that the front portion of the main body 32a rotates downward. As shown in FIG. 5, the force caused by the rotation of the propeller shaft 5 that is rotationally driven by the power unit 2 is disposed upward with respect to the axis C of the propeller shaft 5 and is directed upward with respect to the auxiliary member 16. 4, as shown in FIG. 4, the propeller shaft 5 is disposed offset to the left with respect to the axis C of the propeller shaft 5. The right side (vehicle width direction inner side) portion of the outer peripheral portion of the mount connecting portion 51 is connected and reinforced with the side wall and the rear outer peripheral portion of the main body 32a by the reinforcing portion 51a. The (outside in the direction) part is connected and reinforced with the side wall of the main body 32a and the left boss part 32c by the reinforcing part 51b.
The bolt member 52 is a long rod-like body, and the front end portion is fitted to the rear end portion of the mount connecting portion 51.
図１０に示すように、マウント部材５３は、前後方向に向いて開口する外筒５３ａと、この外筒５３ａ内に収容されたマウントラバー５３ｂと、マウントラバー５３ｂの中心孔に嵌入され且つボルト部材５２が挿通可能な内筒５３ｃ等によって構成され、ボルト部材５２に装着された状態でキャップ５２ａによってマウント連結部５１に固定されている。このマウント部材５３は、基本的に車体上下左右方向の振動を吸収し、通常時における前後の振動も一定限度においてマウントラバー５３ｂで吸収し得るものとなっている。 As shown in FIG. 10, the mount member 53 includes an outer cylinder 53a that opens in the front-rear direction, a mount rubber 53b that is accommodated in the outer cylinder 53a, and a bolt member that is fitted into the center hole of the mount rubber 53b. 52 is configured by an insertable inner cylinder 53c or the like, and is fixed to the mount connecting portion 51 by a cap 52a in a state of being attached to the bolt member 52. The mount member 53 basically absorbs vibrations in the vertical and horizontal directions of the vehicle body, and the front and rear vibrations during normal times can be absorbed by the mount rubber 53b within a certain limit.
図２，図４，図９，図１０に示すように、取付ブラケット５４は、マウント部材５３の外筒５３ａを部分的に覆う状態で左右１対のボルト５５を介して補助メンバ１６の下端部に固定され、且つ左右１対の取付ブラケット４４よりも高い位置になるように配設されている。この取付ブラケット５４は、マウント部材５３の外筒５３ａと予め溶接により接合され、組付け時、マウント部材５３と一体化された一部品として取り扱うことができる。 As shown in FIGS. 2, 4, 9, and 10, the mounting bracket 54 has a lower end portion of the auxiliary member 16 via a pair of left and right bolts 55 in a state of partially covering the outer cylinder 53 a of the mount member 53. And is disposed so as to be higher than the pair of left and right mounting brackets 44. The mounting bracket 54 is joined to the outer cylinder 53a of the mount member 53 by welding in advance, and can be handled as one part integrated with the mount member 53 at the time of assembly.
取付ブラケット５４は、左右１対のフランジ部５４ａと、これら左右１対のフランジ部５４ａの間に一体的に形成された略湾曲形状の湾曲部５４ｂとによって一体的に構成されている。
湾曲部５４ｂの左側（車幅方向外側）部分には、側面視においてマウント連結部５１の後端部に部分的に重なり合うように前方へ延びる延長部５４ｃが形成され、湾曲部５４ｂの左端部に左側フランジ部５４ａが連なっている。延長部５４ｃの前後方向幅は湾曲部５４ｂの車幅方向中央部分の前後方向幅よりも大きく形成され、延長部５４ｃと湾曲部５４ｂの車幅方向中央部分との境界部分は右側へ移行する程幅が小さくなるように緩湾曲状に形成されている。
湾曲部５４ｂの右側及び中央前端部は、軽量化と共に差動装置１の下方回動を許容するために、マウント連結部５１の後端部に重ならないように構成されている。
The mounting bracket 54 is integrally configured by a pair of left and right flange portions 54a and a curved portion 54b having a substantially curved shape integrally formed between the pair of left and right flange portions 54a.
An extension portion 54c extending forward is formed on the left side (outer side in the vehicle width direction) of the curved portion 54b so as to partially overlap the rear end portion of the mount connecting portion 51 in a side view, and is formed at the left end portion of the curved portion 54b. The left flange portion 54a is continuous. The front-rear direction width of the extension part 54c is formed larger than the front-rear direction width of the center part in the vehicle width direction of the curved part 54b, and the boundary part between the extension part 54c and the center part in the vehicle width direction of the curved part 54b is shifted to the right side. It is formed in a gently curved shape so as to reduce the width.
The right side and the central front end of the curved portion 54b are configured not to overlap the rear end of the mount connecting portion 51 in order to reduce the weight and allow the differential device 1 to rotate downward.
取付ブラケット５４は湾曲部５４ｂの中心Ａに対して点対称になるように構成されているため、湾曲部５４ｂの右側（車幅方向内側）部分には、後端部において後方へ延びる延長部５４ｃが形成され、湾曲部５４ｂの右端部に右側フランジ部５４ａが連なるように形成されている。湾曲部５４ｂの中央部分には、軽量化を狙いとする肉抜部が形成されている。
左右１対のフランジ部５４ａの中央部分には、ボルト穴５４ｄが夫々設けられている。
Since the mounting bracket 54 is configured to be point-symmetric with respect to the center A of the curved portion 54b, an extension portion 54c extending rearward at the rear end portion is provided on the right side (in the vehicle width direction) portion of the curved portion 54b. Is formed so that the right flange portion 54a is connected to the right end portion of the curved portion 54b. In the central portion of the curved portion 54b, a lightening portion aimed at weight reduction is formed.
Bolt holes 54d are respectively provided in the central portions of the pair of left and right flange portions 54a.
以上のように、取付ブラケット５４は、左側（車幅方向外側）のフランジ部５４ａが湾曲部５４ｂの中心Ａよりも前側に形成され、右側（車幅方向内側）のフランジ部５４ａが湾曲部５４ｂの中心Ａよりも後側に形成され、右側部分が左側部分と点対称に構成されているため、マウント部材５３の外筒５３ａと接合する際、取付ブラケット５４の組付け方向に拘らず接合することができ、組付作業性を向上できる。また、左側フランジ部５４ａの前端部と右側フランジ部５４ａの後端部との離隔距離を確保できるため、取付ブラケット５４の前後方向幅を大きくでき、マウント部材５３の支持剛性を向上することができる。 As described above, the mounting bracket 54 has the left side (vehicle width direction outer side) flange portion 54a formed in front of the center A of the curved portion 54b, and the right side (vehicle width direction inner side) flange portion 54a. Since the right side portion is configured to be point-symmetric with the left side portion, it is joined regardless of the assembly direction of the mounting bracket 54 when joined to the outer cylinder 53a of the mount member 53. It is possible to improve the assembly workability. Further, since the separation distance between the front end portion of the left flange portion 54a and the rear end portion of the right flange portion 54a can be ensured, the front-rear direction width of the mounting bracket 54 can be increased, and the support rigidity of the mount member 53 can be improved. .
次に、車両前突時の挙動について説明する。
車両前突時には、乗員に対する衝撃力を緩和するべく、車体前部のつぶれ量を確保する必要がある。このため、フロントエンドパネルが車体後方に押し込まれるとともに、フロントサイドフレーム、フロントサブフレームが各々クラッシュカンから順に車体後方へ押し潰されることによって衝撃を吸収する。フロントエンドパネルがパワーユニット２に達すると、パワーユニット２は水平方向後方（多少ずれるものも含む）へ変位を開始する。
Next, the behavior at the time of a vehicle front collision will be described.
In the event of a frontal collision, it is necessary to secure a collapse amount of the front part of the vehicle body in order to reduce the impact force on the occupant. For this reason, the front end panel is pushed rearward of the vehicle body, and the impact is absorbed by the front side frame and the front sub-frame being crushed sequentially from the crash can to the rear of the vehicle body. When the front end panel reaches the power unit 2, the power unit 2 starts to be displaced rearward in the horizontal direction (including those slightly shifted).
パワーユニット２の後退開始に伴い、まずプロペラシャフト５の前側分割シャフト２１に衝撃荷重が入力され、これにより前側分割シャフト２１が後退する。前側分割シャフト２１の縮径部２１ｂが後側分割シャフト２２の先端部に嵌入され、プロペラシャフト５が縮小することにより、縮小後のプロペラシャフト５は一本のシャフトとして機能する。
プロペラシャフト５の縮小後、更に後方に荷重が入力された場合、この荷重はプロペラシャフト５を通じて差動装置１に入力される。
As the power unit 2 starts to retract, an impact load is first input to the front split shaft 21 of the propeller shaft 5, thereby causing the front split shaft 21 to retract. The reduced diameter portion 21b of the front divided shaft 21 is fitted into the distal end portion of the rear divided shaft 22, and the propeller shaft 5 is reduced, so that the reduced propeller shaft 5 functions as a single shaft.
When a load is input further rearward after the propeller shaft 5 is reduced, the load is input to the differential device 1 through the propeller shaft 5.
差動装置１に入力された衝撃荷重が所定値以上の場合、本体３２ａによる後方移行に伴って左右のマウント連結部４１が夫々破断し、後側支持機構５０（マウント部材５３）を中心として本体３２ａの前部が下方に回動するような曲げモーメントが生じる。このため、本体３２ａの前部が下方に回動することにより前傾姿勢へと姿勢変更し、後側分割シャフト２２の後端部と第１差動機構３１の入力軸３１ａとの連結が解除されることにより、パワーユニット２の後方変位量を増大することができる。 When the impact load input to the differential device 1 is greater than or equal to a predetermined value, the left and right mount connecting portions 41 are broken along with the rearward transition by the main body 32a, and the main body centering on the rear support mechanism 50 (mount member 53). A bending moment is generated such that the front portion of 32a rotates downward. For this reason, when the front portion of the main body 32a is rotated downward, the posture is changed to the forward inclined posture, and the connection between the rear end portion of the rear divided shaft 22 and the input shaft 31a of the first differential mechanism 31 is released. By doing so, the rearward displacement amount of the power unit 2 can be increased.
このとき、マウント部材５３がプロペラシャフト５の軸心Ｃに対して左方にオフセット配置されているため、マウント部材５３に斜め後方へ向かう衝撃荷重が作用し、ボルト部材５２に左側（車幅方向外側）へ向かう分力が作用する。それ故、衝撃荷重の分力がボルト部材５２の強度を越えた場合、ボルト部材５２が破断し、その結果、本体３２ａに対して前部を下方に回動させるために十分な曲げモーメントを発生できない虞がある。本実施形態では、取付ブラケット５４の湾曲部５４ｂの左側部分に延長部５４ｃを形成しているため、図１１に示すように、ボルト部材５２が破断した場合であっても、マウント連結部５１の後端部による左側変位を延長部５４ｃによって制限することができ、下方回動のための曲げモーメントを確保している。 At this time, since the mount member 53 is offset to the left with respect to the axis C of the propeller shaft 5, an impact load acting obliquely rearward acts on the mount member 53, and the bolt member 52 is subjected to the left side (vehicle width direction). A component force toward the outside acts. Therefore, when the component force of the impact load exceeds the strength of the bolt member 52, the bolt member 52 is broken, and as a result, a bending moment sufficient to rotate the front portion downward with respect to the main body 32a is generated. There is a possibility that it cannot be done. In the present embodiment, since the extension portion 54c is formed on the left side portion of the curved portion 54b of the mounting bracket 54, even if the bolt member 52 is broken as shown in FIG. The left side displacement by the rear end portion can be limited by the extension portion 54c, and a bending moment for downward rotation is ensured.
次に、上記車両Ｖの後輪駆動装置取付構造の作用・効果について説明する。
この車両Ｖの後輪駆動装置取付構造では、差動装置１の後端部にプロペラシャフト５の軸心に対して車幅方向と上下方向にオフセットさせて設けられたマウント連結部５１と、このマウント連結部５１の後端部から後方へ延びるボルト部材５２の後端側部分に略同軸状態で取り付けられたマウント部材５３と、マウント部材５３を補助メンバ１６に固定する取付ブラケット５４とを備えるため、車両前突時、差動装置１（本体３２ａ）による下方回動を実行することができる。
取付ブラケット５４がマウント連結部５１の後端部に側面視において部分的に重なり合うように形成されているため、ボルト部材５２に車幅方向外側へ向かう分力が作用してボルト部材５２が破断しても、マウント連結部５１の後端部の車幅方向の移動を取付ブラケット５４によって規制し、その結果、差動装置１の車幅方向の逸脱を防止して、差動装置１による下方回動を確実に実現することができ、乗員への衝撃を軽減できる。
Next, the operation and effect of the vehicle V rear wheel drive device mounting structure will be described.
In the rear wheel drive device mounting structure of the vehicle V, a mount connecting portion 51 provided at the rear end portion of the differential device 1 so as to be offset in the vehicle width direction and the vertical direction with respect to the axis of the propeller shaft 5, To include a mount member 53 attached to the rear end portion of the bolt member 52 extending rearward from the rear end portion of the mount connecting portion 51 in a substantially coaxial state, and a mounting bracket 54 for fixing the mount member 53 to the auxiliary member 16. When the vehicle collides, the downward rotation by the differential device 1 (main body 32a) can be executed.
Since the mounting bracket 54 is formed so as to partially overlap the rear end portion of the mount connecting portion 51 in a side view, the bolt member 52 breaks due to a component force acting on the bolt member 52 outward in the vehicle width direction. However, the movement of the rear end portion of the mount connecting portion 51 in the vehicle width direction is restricted by the mounting bracket 54. As a result, the differential device 1 is prevented from deviating in the vehicle width direction. Movement can be realized reliably, and the impact on the passenger can be reduced.
マウント連結部５１は、プロペラシャフト５の回転に起因した力が補助メンバ１６に上方向きに作用するように配設され、取付ブラケット５４の車幅方向外側部分にマウント連結部５１と重なり合う延長部５４ｃを設けているため、プロペラシャフト５の軸心回りの回転に起因した力を利用してマウント部材５３の支持剛性を向上できると共に延長部５４ｃの追加のみで差動装置１の逸脱防止と下方回動の実現との両立を図ることができる。 The mount connecting portion 51 is disposed such that a force resulting from the rotation of the propeller shaft 5 acts upward on the auxiliary member 16, and an extension portion 54 c that overlaps the mount connecting portion 51 on the outer side in the vehicle width direction of the mounting bracket 54. Therefore, it is possible to improve the support rigidity of the mount member 53 using the force resulting from the rotation of the propeller shaft 5 around the axis thereof, and to prevent the differential device 1 from deviating and rotate downward only by adding the extension 54c. It is possible to achieve compatibility with realization of movement.
差動装置１の前側部分から車幅方向外側へ夫々延びる左右１対のマウント連結部４１と、左右１対のマウント連結部４１に軸心が車体前後方向に延びるように夫々支持された左右１対のマウント部材４３と、左右１対のマウント部材４３を左右１対のボルト部材４２を介して支持部材１７に夫々固定する左右１対の取付ブラケット４４とを備えたため、３点支持の差動装置１において、車両前突時におけるプロペラシャフト５及び差動装置１による狙いの挙動を実現できる。
左右１対の取付ブラケット４４は取付ブラケット５４よりも低い位置に固定されているため、簡単な構成で差動装置１による下方回動を確実に実現することができる。
A pair of left and right mount connecting portions 41 extending outward from the front portion of the differential device 1 in the vehicle width direction, and left and right 1 supported by the pair of left and right mount connecting portions 41 so that the shaft centers extend in the longitudinal direction of the vehicle body. A pair of mounting members 43 and a pair of left and right mounting brackets 44 for fixing the left and right pair of mounting members 43 to the support member 17 via a pair of left and right bolt members 42 are provided. In the device 1, it is possible to realize the intended behavior by the propeller shaft 5 and the differential device 1 at the time of a vehicle front collision.
Since the pair of left and right mounting brackets 44 are fixed at a lower position than the mounting bracket 54, the differential device 1 can reliably rotate downward with a simple configuration.
次に、前記実施形態を部分的に変更した変形例について説明する。
１〕前記実施形態においては、取付ブラケットの湾曲部の左側部分前端部と右側部分後端部との両側に延長部を形成した例を説明したが、少なくとも差動装置の車幅方向の変位を規制できれば良く、湾曲部の前端部側のみに延長部を形成しても良い。
また、延長部と湾曲部の車幅方向中央部分との境界部分を緩湾曲状に形成した例を説明したが、角部を有する鈎形状に形成しても良い。
Next, a modified example in which the embodiment is partially changed will be described.
1) In the above-described embodiment, the example in which the extension portions are formed on both sides of the front end portion on the left side and the rear end portion on the right side of the curved portion of the mounting bracket has been described. As long as it can be regulated, the extension portion may be formed only on the front end side of the curved portion.
Moreover, although the example which formed the boundary part of the extension part and the vehicle width direction center part of a curved part in the gently curved shape was demonstrated, you may form in the collar shape which has a corner | angular part.
２〕前記実施形態においては、後側支持機構をプロペラシャフトの軸心に対して左方にオフセットした例を説明したが、少なくとも、プロペラシャフトの回転に起因した力が車体側部材に上方向きに作用すれば良く、プロペラシャフトの回転方向に応じて後側支持機構をプロペラシャフトの軸心に対して右方にオフセットさせても良い。
また、マウント部材の支持剛性を十分に確保できる場合、レイアウト性を優先して、プロペラシャフトの回転に起因した力が車体側部材に下方向きに作用する方向にオフセットさせることも可能である。
2) In the above-described embodiment, the example in which the rear support mechanism is offset leftward with respect to the axis of the propeller shaft has been described. However, at least the force caused by the rotation of the propeller shaft is directed upward on the vehicle body side member. The rear support mechanism may be offset to the right with respect to the axis of the propeller shaft according to the rotation direction of the propeller shaft.
Further, when the support rigidity of the mount member can be sufficiently secured, it is also possible to offset the force due to the rotation of the propeller shaft in a direction in which the force is caused to act downward on the vehicle body side member, giving priority to the layout.
３〕前記実施形態においては、後側支持機構を単一のマウント連結部とマウント部材によって形成した例を説明したが、前側支持機構のように、複数のマウント連結部とマウント部材によって後側支持機構を形成しても良い。この場合、差動装置の変位方向を予め求め、この差動装置の変位を規制する延長部を取付ブラケットの湾曲部に設ける。 3) In the above embodiment, an example in which the rear support mechanism is formed by a single mount connecting portion and a mount member has been described. However, as in the front support mechanism, the rear support mechanism is supported by a plurality of mount connecting portions and mount members. A mechanism may be formed. In this case, the displacement direction of the differential device is obtained in advance, and an extension for restricting the displacement of the differential device is provided on the curved portion of the mounting bracket.
４〕前記実施形態においては、前側分割シャフトが後側分割シャフトに嵌入可能な縮小機能を備えたプロペラシャフトの例を説明したが、縮小機能を備えていないプロペラシャフトの車両に適用しても本発明と同様の効果を奏することができる。
５〕その他、当業者であれば、本発明の趣旨を逸脱することなく、前記実施形態に種々の変更を付加した形態で実施可能であり、本発明はそのような変更形態も包含するものである。
4] In the above embodiment, an example of a propeller shaft having a reduction function capable of fitting the front side division shaft into the rear side division shaft has been described, but the present invention may be applied to a propeller shaft vehicle having no reduction function. The same effects as the invention can be achieved.
5] In addition, those skilled in the art can implement the present invention with various modifications added without departing from the spirit of the present invention, and the present invention includes such modifications. is there.
１ 差動装置
２ パワーユニット
５ プロペラシャフト
１６ 補助メンバ
３２ 第２差動機構
３２ａ 本体
４０ 前側支持機構
４１ （前側）マウント連結部
４２ （前側）ボルト部材
４３ （前側）マウント部材
４４ （前側）取付ブラケット
５０ 後側支持機構
５１ （後側）マウント連結部
５２ （後側）ボルト部材
５３ （後側）マウント部材
５４ （後側）取付ブラケット
５４ａ フランジ部
５４ｂ 湾曲部
５４ｃ 延長部
Ｖ 車両
Ｃ （プロペラシャフト）軸心
DESCRIPTION OF SYMBOLS 1 Differential apparatus 2 Power unit 5 Propeller shaft 16 Auxiliary member 32 2nd differential mechanism 32a Main body 40 Front side support mechanism 41 (Front side) Mount connection part 42 (Front side) Bolt member 43 (Front side) Mount member 44 (Front side) Mounting bracket 50 Rear support mechanism 51 (rear side) mount connecting portion 52 (rear side) bolt member 53 (rear side) mount member 54 (rear side) mounting bracket 54a flange portion 54b curved portion 54c extension portion V vehicle C (propeller shaft) shaft heart
Claims (4)
前記後輪駆動装置の後端部に前記プロペラシャフトの軸心に対して車幅方向と上下方向にオフセットさせて設けられたマウント連結部と、
前記マウント連結部の後端部から後方へ延びるボルト部材と、
前記ボルト部材の後端側部分に略同軸状態で取り付けられたマウント部材と、
前記マウント部材を車体側部材に固定する取付ブラケットとを備え、
前記取付ブラケットが前記マウント連結部の後端部に側面視において部分的に重なり合うように形成されたことを特徴とする車両の後輪駆動装置取付構造。 Vehicle rear wheel drive device mounting provided with a rear wheel drive device provided at the rear of the vehicle body and a propeller shaft extending in the vehicle longitudinal direction for transmitting the driving force of the power unit provided at the front of the vehicle body to the rear wheel drive device In structure
A mount coupling portion provided at the rear end portion of the rear wheel drive device by being offset in the vehicle width direction and the vertical direction with respect to the axis of the propeller shaft;
A bolt member extending rearward from a rear end portion of the mount coupling portion;
A mounting member attached to the rear end portion of the bolt member in a substantially coaxial state;
A mounting bracket for fixing the mount member to the vehicle body side member;
A rear wheel drive device mounting structure for a vehicle, wherein the mounting bracket is formed so as to partially overlap a rear end portion of the mount connecting portion in a side view.
前記取付ブラケットの車幅方向外側部分に前記マウント連結部と重なり合う延長部を設けたことを特徴とする請求項１に記載の車両の後輪駆動装置取付構造。 The mount connecting portion is arranged so that a force due to the rotation of the propeller shaft acts upward on the vehicle body side member,
The vehicle rear wheel drive device mounting structure according to claim 1, wherein an extension portion that overlaps with the mount coupling portion is provided on an outer portion in the vehicle width direction of the mounting bracket.
前記左右１対の前側マウント連結部に軸心が車体前後方向に延びるように夫々支持された左右１対の前側マウント部材と、
前記左右１対の前側マウント部材を左右１対の前側ボルト部材を介して車体側部材に夫々固定する左右１対の前側取付ブラケットとを備えたことを特徴とする請求項１又は２に記載の車両の後輪駆動装置取付構造。 A pair of left and right front mount connecting portions extending outward in the vehicle width direction from the front portion of the rear wheel drive device;
A pair of left and right front mount members respectively supported by the pair of left and right front mount connecting portions so that an axial center extends in the longitudinal direction of the vehicle body;
The left and right pair of front mounting members are provided with a pair of left and right front mounting brackets for fixing the pair of left and right front mounting members to the vehicle body side member via a pair of left and right front bolt members, respectively. Vehicle rear wheel drive device mounting structure.
The vehicle rear wheel drive device mounting structure according to claim 3, wherein the pair of left and right front mounting brackets are fixed at a position lower than the mounting bracket.
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| JP2014054989A JP6079674B2 (en) | 2014-03-18 | 2014-03-18 | Vehicle rear wheel drive mounting structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014054989A JP6079674B2 (en) | 2014-03-18 | 2014-03-18 | Vehicle rear wheel drive mounting structure |
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| JP6079674B2 true JP6079674B2 (en) | 2017-02-15 |
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| JP5488117B2 (en) * | 2010-03-30 | 2014-05-14 | マツダ株式会社 | Driving force transmission device for automobile and lower body structure of automobile equipped with the same |
| JP5666386B2 (en) * | 2011-06-08 | 2015-02-12 | 本田技研工業株式会社 | Differential device and vehicle equipped with the same |
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