JP2003300491A - Car body pitching restraining structure in small vehicle - Google Patents
Car body pitching restraining structure in small vehicleInfo
- Publication number
- JP2003300491A JP2003300491A JP2002107297A JP2002107297A JP2003300491A JP 2003300491 A JP2003300491 A JP 2003300491A JP 2002107297 A JP2002107297 A JP 2002107297A JP 2002107297 A JP2002107297 A JP 2002107297A JP 2003300491 A JP2003300491 A JP 2003300491A
- Authority
- JP
- Japan
- Prior art keywords
- front wheel
- body frame
- vehicle body
- car body
- vehicle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000000452 restraining effect Effects 0.000 title claims abstract description 8
- 230000035939 shock Effects 0.000 abstract description 2
- 230000006866 deterioration Effects 0.000 abstract 1
- 239000002828 fuel tank Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
Landscapes
- Air Bags (AREA)
Abstract
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、前輪を軸支するフ
ロントフォークを操向可能に支承するヘッドパイプが前
端に設けられる車体フレームと、該車体フレームの後部
に設けられるシート上の操縦者を拘束し得る拘束装置と
を備える小型車両に関し、特に、前面衝突時に小型車両
の車体に生じるピッチング挙動を抑制するための構造に
関する。
【０００２】
【従来の技術】衝突等による衝撃が作用したときに、シ
ート上の操縦者をエアバッグで拘束するようにした小型
車両たとえば自動二輪車が、たとえば特開平９−３２８
０５３号公報等で既に知られている。
【０００３】
【発明が解決しようとする課題】上記従来のものでは、
衝突時等にシート上の操縦者をエアバッグ等に拘束する
ことで、操縦者の衝撃を緩和するようにしているのであ
るが、自動二輪車等の小型車両では前面衝突が生じたと
きには、慣性によって車体後部が浮き上がるようなピッ
チング挙動が車体に生じる可能性があり、そのような車
体のピッチング挙動が生じると、エアバッグ装置等の拘
束装置による操縦者の拘束性が低下する可能性がある。
【０００４】本発明は、かかる事情に鑑みてなされたも
のであり、前面衝突時の車体ピッチング挙動を抑えて、
拘束装置による拘束性の低下を防止した小型車両におけ
る車体ピッチング抑制構造を提供することを目的とす
る。
【０００５】
【課題を解決するための手段】上記目的を達成するため
に、本発明は、前輪を軸支するフロントフォークを操向
可能に支承するヘッドパイプが前端に設けられる車体フ
レームと、該車体フレームの後部に設けられるシート上
の操縦者を拘束し得る拘束装置とを備える小型車両にお
いて、前方側からの衝撃の作用に応じて前記前輪が車体
フレームに対して後退するときに、該前輪に接触すると
ともに接触した前輪を下方にガイドするガイド部が、前
輪に後方から対向する位置で前記車体フレームの前部に
設けられることを特徴とする。
【０００６】かかる構成によれば、前面衝突が生じる
と、前輪は、フロントフォークを屈曲させながら車体フ
レームに対して後退しようとするが、車体フレームの前
部に設けられたガイド部に前輪が接触すると、該ガイド
部は、前輪を下方に移動する方向にガイドすることにな
る。これにより、前面衝突時には車体後部が浮き上がる
ようなピッチング挙動を生じさせる力が慣性によって車
体には作用するが、前記前輪を下方にガイドすることに
よって車体前部に生じる上向きの反力と、車体後部に生
じる上向きの慣性力とが相殺されることにより、車体の
ピッチング挙動が抑制されることになる。したがって前
面衝突時に、拘束装置によるシート上の操縦者の拘束性
が低下することを防止して操縦者に作用する衝撃を緩和
することができる。
【０００７】
【発明の実施の形態】以下、本発明の実施の形態を、添
付の図面に示した本発明の一実施例に基づいて説明す
る。
【０００８】図１および図２は本発明の一実施例を示す
ものであり、図１は自動二輪車の側面図、図２は前面衝
突時の自動二輪車の側面図である。
【０００９】先ず図１において、この自動二輪車の車体
フレーム５が前端に備えるヘッドパイプ６にはフロント
フォーク７が操向可能に支承され、フロントフォーク７
の下端に前輪ＷＦが軸支され、フロントフォーク７の上
部に操向ハンドル８が連結される。また車体フレーム５
の後部にはスイングアーム９が上下揺動可能に軸支され
ており、このスイングアーム９の後端に後輪ＷＲが軸支
される。
【００１０】車体フレーム５の前半部には、燃料タンク
１０が搭載され、車体フレーム５の後部上には、前記燃
料タンク１０の後方に配置されるタンデム型のシート１
２が配設される。
【００１１】たとえばヘッドパイプ６および燃料タンク
１０間で車体フレーム５には、拘束装置であるエアバッ
グ装置１３が設けられており、このエアバッグ装置１３
は、自動二輪車に衝突等で衝撃が作用したときに、図２
で示すように、エアバッグ１４を膨張展開させることが
でき、このエアバッグ１４によりシート１２上の操縦者
を前方から拘束することができる。
【００１２】また前輪ＷＲに後方から対向する位置で車
体フレーム５には、前方側からの衝撃の作用に応じて前
輪ＷＦが車体フレーム５に対して後退するときに、該前
輪ＷＲに接触するとともに接触した前輪ＷＲを下方にガ
イドするガイド部１５が設けられる。
【００１３】次にこの実施例の作用について説明する
と、自動二輪車が前面衝突したときには、前輪ＷＦは、
図２で示すようにフロントフォーク７を屈曲させながら
車体フレーム５に対して後退しようとする。しかるに車
体フレーム５の前部には、前輪ＷＦに後方側から対向す
るガイド部１５が設けられており、このガイド部１５に
前輪ＷＦが接触すると、ガイド部１５により前輪ＷＦが
下方にガイドされ、それにより車体前部には矢印１７で
示すように浮き上がる方向の反力が作用する。
【００１４】したがって前面衝突時には、車体後部が浮
き上がるようなピッチング挙動を生じさせる慣性力が矢
印１８で示す方向で車体には作用するのであるが、前輪
ＷＦを下方にガイドすることによって車体前部に作用す
る反力と前記車体後部の慣性力とが相殺されることによ
り、車体のピッチング挙動が抑制されることになる。し
たがって前面衝突時に、エアバッグ装置１３によるシー
ト１２上の操縦者の拘束性が低下することを防止して、
操縦者に作用する衝撃を緩和することができる。
【００１５】以上、本発明の実施例を説明したが、本発
明は上記実施例に限定されるものではなく、特許請求の
範囲に記載された本発明を逸脱することなく種々の設計
変更を行うことが可能である。
【００１６】たとえば本発明は、上記実施例で説明した
自動二輪車だけでなく、スクータ型の自動二輪車や自動
三輪車等の小型車両に広く適用可能である。
【００１７】また拘束装置としてシートベルト装置が装
着される小型車両にも本発明を適用可能である。
【００１８】
【発明の効果】以上のように本発明によれば、前面衝突
時に、拘束装置によるシート上の操縦者の拘束性が低下
することを防止して操縦者に作用する衝撃を緩和するこ
とができる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body frame provided at a front end thereof with a head pipe for steerably supporting a front fork for pivotally supporting a front wheel, and a vehicle body frame. More particularly, the present invention relates to a structure for suppressing a pitching behavior that occurs in a vehicle body of a small vehicle at the time of a frontal collision. 2. Description of the Related Art A small vehicle, such as a motorcycle, in which a driver on a seat is restrained by an airbag when an impact due to a collision or the like is applied, is disclosed in, for example, Japanese Patent Laid-Open No. 9-328.
It is already known in Japanese Patent Publication No. 053 and the like. [0003] In the above conventional device,
In the event of a collision, the driver on the seat is restrained by an airbag to reduce the impact of the driver.However, in the case of a small vehicle such as a motorcycle, when a frontal collision occurs, There is a possibility that a pitching behavior in which the rear of the vehicle body rises may occur in the vehicle body, and if such a pitching behavior of the vehicle body occurs, the restraint of the operator by a restraining device such as an airbag device may be reduced. The present invention has been made in view of such circumstances, and suppresses the pitching behavior of a vehicle at the time of a frontal collision.
An object of the present invention is to provide a vehicle body pitching suppressing structure in a small vehicle in which a restraint by a restraining device is prevented from lowering. SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a vehicle body frame having a front pipe provided at a front end thereof for steering a front fork for supporting a front wheel. A restraining device provided at a rear portion of the body frame and capable of restraining a driver on a seat, wherein when the front wheel retreats with respect to the body frame in response to an impact from the front side, the front wheel A guide portion that contacts the front wheel and guides the contacted front wheel downward is provided at a front portion of the vehicle body frame at a position facing the front wheel from behind. With this configuration, when a frontal collision occurs, the front wheels try to retreat with respect to the vehicle body frame while bending the front fork, but the front wheels come into contact with the guide portion provided at the front part of the vehicle body frame. Then, the guide portion guides the front wheel in the direction of moving downward. Thus, at the time of a frontal collision, a force causing a pitching behavior such that the rear of the vehicle body lifts acts on the vehicle body by inertia, but an upward reaction force generated at the front of the vehicle body by guiding the front wheels downward, and , The pitching behavior of the vehicle body is suppressed. Therefore, at the time of a frontal collision, it is possible to prevent the restraint of the operator on the seat from being reduced by the restraint device and to reduce the impact acting on the operator. An embodiment of the present invention will be described below with reference to an embodiment of the present invention shown in the accompanying drawings. FIGS. 1 and 2 show an embodiment of the present invention. FIG. 1 is a side view of a motorcycle, and FIG. 2 is a side view of the motorcycle at the time of a frontal collision. Referring to FIG. 1, a front fork 7 is slidably supported on a head pipe 6 provided at the front end of a body frame 5 of the motorcycle.
A front wheel WF is pivotally supported at a lower end of the front fork 7, and a steering handle 8 is connected to an upper portion of the front fork 7. Also body frame 5
A swing arm 9 is pivotally supported at the rear of the swing arm 9 so as to be able to swing up and down. A rear wheel WR is pivotally supported at the rear end of the swing arm 9. A fuel tank 10 is mounted on the front half of the body frame 5, and a tandem seat 1 disposed behind the fuel tank 10 is provided on the rear of the body frame 5.
2 are provided. For example, an airbag device 13 as a restraining device is provided in the body frame 5 between the head pipe 6 and the fuel tank 10.
Fig. 2 shows that when a shock is applied to a motorcycle due to a collision or the like,
As shown by the arrow, the airbag 14 can be inflated and deployed, and the operator on the seat 12 can be restrained from the front by the airbag 14. When the front wheel WF moves backward with respect to the vehicle body frame 5 in response to an impact from the front side, the vehicle body frame 5 contacts the front wheel WR at a position facing the front wheel WR from behind. A guide portion 15 for guiding the contacted front wheel WR downward is provided. Next, the operation of this embodiment will be described. When the motorcycle has a frontal collision, the front wheels WF
As shown in FIG. 2, the front fork 7 bends with respect to the vehicle body frame 5 while bending. However, the front portion of the body frame 5 is provided with a guide portion 15 facing the front wheel WF from the rear side. When the front wheel WF comes into contact with the guide portion 15, the front wheel WF is guided downward by the guide portion 15, As a result, a reaction force acts on the front part of the vehicle body in the direction in which it floats as indicated by arrow 17. Therefore, at the time of a frontal collision, an inertial force causing a pitching behavior such that the rear portion of the vehicle body is lifted acts on the vehicle body in the direction indicated by arrow 18. By canceling the acting reaction force and the inertial force of the rear part of the vehicle body, the pitching behavior of the vehicle body is suppressed. Therefore, at the time of a frontal collision, it is possible to prevent the restraint of the operator on the seat 12 by the airbag device 13 from being reduced,
The impact acting on the pilot can be reduced. The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the present invention described in the appended claims. It is possible. For example, the present invention is widely applicable not only to the motorcycle described in the above embodiment, but also to small vehicles such as scooter-type motorcycles and motorcycles. The present invention is also applicable to a small vehicle in which a seat belt device is mounted as a restraint device. As described above, according to the present invention, at the time of a frontal collision, the restraint of the operator on the seat by the restraint device is prevented from being reduced, and the impact acting on the operator is reduced. be able to.
【図面の簡単な説明】 【図１】自動二輪車の側面図である。 【図２】前面衝突時の自動二輪車の側面図である。 【符号の説明】 ５・・・車体フレーム ６・・・ヘッドパイプ ７・・・フロントフォーク １２・・・シート １３・・・拘束装置としてのエアバッグ装置 １５・・・ガイド部 ＷＦ・・・前輪[Brief description of the drawings] FIG. 1 is a side view of a motorcycle. FIG. 2 is a side view of the motorcycle at the time of a frontal collision. [Explanation of symbols] 5 Body frame 6 ... Head pipe 7 Front fork 12 ... sheet 13 ... Airbag device as restraint device 15 ・ ・ ・ Guide WF: Front wheel
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中山 研吾 埼玉県和光市中央１丁目４番１号 株式会 社本田技術研究所内 Ｆターム(参考） 3D054 AA02 AA13 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kengo Nakayama 1-4-1 Chuo, Wako-shi, Saitama Stock Association Inside the Honda Research Laboratory F term (reference) 3D054 AA02 AA13
Claims (1)
ク（７）を操向可能に支承するヘッドパイプ（６）が前
端に設けられる車体フレーム（５）と、該車体フレーム
（５）の後部に設けられるシート（１２）上の操縦者を
拘束し得る拘束装置（１３）とを備える小型車両におい
て、前方側からの衝撃の作用に応じて前記前輪（ＷＦ）
が車体フレーム（５）に対して後退するときに、該前輪
（ＷＦ）に接触するとともに接触した前輪（ＷＦ）を下
方にガイドするガイド部（１５）が、前輪（ＷＦ）に後
方から対向する位置で前記車体フレーム（５）の前部に
設けられることを特徴とする小型車両における車体ピッ
チング抑制構造。Claims: 1. A body frame (5) provided at a front end thereof with a head pipe (6) slidably supporting a front fork (7) for supporting a front wheel (WF), and the vehicle body A restraint device (13) provided on a rear portion of a frame (5) and capable of restraining a driver on a seat (12), wherein the front wheel (WF) is actuated in response to an impact from a front side.
When the vehicle retreats with respect to the vehicle body frame (5), a guide portion (15) that contacts the front wheel (WF) and guides the contacted front wheel (WF) downward is opposed to the front wheel (WF) from behind. A vehicle body pitching suppressing structure for a small vehicle, wherein the vehicle body pitching suppressing structure is provided at a position in front of the vehicle body frame (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002107297A JP4394861B2 (en) | 2002-04-10 | 2002-04-10 | Body pitching suppression structure for motorcycles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002107297A JP4394861B2 (en) | 2002-04-10 | 2002-04-10 | Body pitching suppression structure for motorcycles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003300491A true JP2003300491A (en) | 2003-10-21 |
| JP4394861B2 JP4394861B2 (en) | 2010-01-06 |
Family
ID=29391339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002107297A Expired - Fee Related JP4394861B2 (en) | 2002-04-10 | 2002-04-10 | Body pitching suppression structure for motorcycles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4394861B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010137830A (en) * | 2008-12-15 | 2010-06-24 | Honda Motor Co Ltd | Vehicle body structure of motorcycle |
| EP2236400A1 (en) * | 2009-03-31 | 2010-10-06 | Honda Motor Co., Ltd. | Body structure of straddle-ride type vehicle |
| JP2010234921A (en) * | 2009-03-30 | 2010-10-21 | Honda Motor Co Ltd | Saddle ride type vehicle |
-
2002
- 2002-04-10 JP JP2002107297A patent/JP4394861B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010137830A (en) * | 2008-12-15 | 2010-06-24 | Honda Motor Co Ltd | Vehicle body structure of motorcycle |
| JP2010234921A (en) * | 2009-03-30 | 2010-10-21 | Honda Motor Co Ltd | Saddle ride type vehicle |
| EP2236400A1 (en) * | 2009-03-31 | 2010-10-06 | Honda Motor Co., Ltd. | Body structure of straddle-ride type vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4394861B2 (en) | 2010-01-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4331974B2 (en) | Steering column support device | |
| US8002305B2 (en) | Low-floor type vehicle | |
| JP4665727B2 (en) | Steering device support structure | |
| JP4721280B2 (en) | Vehicle with impact mitigation device | |
| JP5276968B2 (en) | Motorcycle body structure | |
| KR100672289B1 (en) | Rider restriction device of two-wheeled vehicle | |
| US8562010B2 (en) | Body structure of straddle-ride vehicle | |
| JP2001219884A (en) | Air bag device for saddle riding vehicle | |
| US8122992B2 (en) | Impact member for a saddle-type vehicle, and vehicle incorporating same | |
| JP2003300491A (en) | Car body pitching restraining structure in small vehicle | |
| JP2001219885A (en) | Air bag device for saddle riding vehicle | |
| JP5285554B2 (en) | Body structure of saddle-ride type vehicle | |
| US7819455B2 (en) | Straddle-type vehicle | |
| JP2021112954A (en) | Collision detection device | |
| JP2003306184A (en) | Air bag device | |
| JP4767819B2 (en) | Saddle riding | |
| WO2023139768A1 (en) | Airbag device | |
| JP4150630B2 (en) | Steering column support device | |
| JP4225497B2 (en) | Crew restraint device for motorcycles | |
| JP2012250624A (en) | Saddle riding type vehicle | |
| JP4375670B2 (en) | Automotive impact force absorber | |
| JP4216674B2 (en) | Foot-operated parking brake device | |
| JP4908126B2 (en) | Front fender | |
| JP4211367B2 (en) | Shock absorbing steering column device | |
| JP2003054424A (en) | Steering column fitting structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20041202 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20071213 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20071219 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20080218 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20080806 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20081006 |
|
| A911 | Transfer to examiner for re-examination before appeal (zenchi) |
Free format text: JAPANESE INTERMEDIATE CODE: A911 Effective date: 20081016 |
|
| A912 | Re-examination (zenchi) completed and case transferred to appeal board |
Free format text: JAPANESE INTERMEDIATE CODE: A912 Effective date: 20081205 |
|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20091016 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 4394861 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121023 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121023 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131023 Year of fee payment: 4 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |