JPH0647745U - Damage detection device for leaf spring made of fiber reinforced resin - Google Patents
Damage detection device for leaf spring made of fiber reinforced resinInfo
- Publication number
- JPH0647745U JPH0647745U JP8952892U JP8952892U JPH0647745U JP H0647745 U JPH0647745 U JP H0647745U JP 8952892 U JP8952892 U JP 8952892U JP 8952892 U JP8952892 U JP 8952892U JP H0647745 U JPH0647745 U JP H0647745U
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- leaf spring
- conductive
- reinforced resin
- fibers
- 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.)
- Pending
Links
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Vehicle Body Suspensions (AREA)
- Springs (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
(57)【要約】
【目的】埋設された導電性繊維又は導電性線材の電気的
特性の変化を検出することにより板ばねの交換時期を正
確に知ることができる。
【構成】繊維強化樹脂製板ばね１７に多数の導電性繊維
１７ａが長手方向に延びて埋設される。繊維強化樹脂製
板ばね１７の両端にそれぞれ固着された一対のコネクタ
３２，３３が多数の導電性繊維１７ａの両端をそれぞれ
電気的に接続する。一対のコネクタ３２，３３に電源３
７を介して接続された検出手段３８が導電性繊維１７ａ
の少なくとも一部の繊維１７ａの切断による導電性繊維
１７ａの電気的特性の変化を検出し、電気的特性の変化
が所定値以上に達したときに警報手段４６が警報を発す
る。
(57) [Abstract] [Purpose] The leaf spring replacement timing can be accurately known by detecting changes in the electrical characteristics of the embedded conductive fiber or conductive wire. [Structure] A large number of conductive fibers 17a are embedded in a fiber-reinforced resin leaf spring 17 extending in the longitudinal direction. A pair of connectors 32 and 33 fixed to both ends of the fiber-reinforced resin leaf spring 17 electrically connect both ends of a large number of conductive fibers 17a. Power supply 3 to the pair of connectors 32 and 33
The detection means 38 connected via 7 is the conductive fiber 17a.
A change in the electrical characteristics of the conductive fiber 17a due to the cutting of at least a part of the fibers 17a is detected, and the alarm means 46 issues an alarm when the change in the electrical characteristics reaches a predetermined value or more.
Description
【０００１】[0001]
本考案は車両のサスペンションに適した繊維強化樹脂製板ばねの損傷を検出す る装置に関するものである。 The present invention relates to a device for detecting damage to a fiber-reinforced resin leaf spring suitable for a vehicle suspension.
【０００２】[0002]
この種の板ばねは多数のカーボンファイバやグラスファイバ等の繊維が長手方 向に埋設された繊維強化樹脂製の板ばねであり、金属製板ばねより重量が小さく 、車両の軽量化を図ることができる利点がある。 This type of leaf spring is a leaf spring made of fiber reinforced resin in which many fibers such as carbon fibers and glass fibers are embedded in the longitudinal direction, and the weight is smaller than that of metal leaf springs, and the weight of the vehicle should be reduced. There is an advantage that can be.
【０００３】[0003]
しかし、上記繊維強化樹脂製板ばねでは、板ばねの繰返しの撓みにより樹脂に 埋設されたカーボンファイバやグラスファイバが繰返し伸縮して、一部のファイ バが疲労により切断しても、その切断を外側から目視により確認できず、板ばね の交換時期を正確に知ることができない不具合があった。 However, in the above fiber-reinforced resin leaf spring, even if some fibers are cut due to fatigue, the carbon fiber and glass fiber embedded in the resin repeatedly expand and contract due to the repeated bending of the leaf spring, and the cutting is performed. There was a problem that it was not possible to visually check from the outside, and it was not possible to know exactly when to replace the leaf spring.
【０００４】 本考案の目的は、埋設された導電性繊維又は導電性線材の電気的特性の変化を 検出することにより板ばねの交換時期を正確に知ることができる繊維強化樹脂製 板ばねの損傷検出装置を提供することにある。The object of the present invention is to detect the change in the electrical characteristics of the embedded conductive fiber or conductive wire so that the replacement timing of the leaf spring can be accurately known. It is to provide a detection device.
【０００５】[0005]
上記目的を達成するための本考案の構成を、実施例に対応する図１、図２及び 図４を用いて説明する。 本考案の繊維強化樹脂製板ばねの損傷検出装置は、図１及び図２に示すように 多数の導電性繊維１７ａが長手方向に延びて埋設された繊維強化樹脂製板ばね１ ６，１７と、板ばね１６，１７の両端にそれぞれ固着され多数の導電性繊維１７ ａの両端をそれぞれ電気的に接続する一対のコネクタ２７，２８，３２，３３と 、一対のコネクタ２７，２８，３２，３３に電源３７を介して接続され導電性繊 維１７ａの少なくとも一部の繊維１７ａの切断による導電性繊維１７ａの電気的 特性の変化を検出する検出手段３８と、電気的特性の変化が所定値以上に達した ときに警報を発する警報手段４６とを備えたものである。 また、図４に示すように繊維強化樹脂製板ばね７１に多数の導電性線材７１ｂ を長手方向に延びて埋設することもできる。 A configuration of the present invention for achieving the above object will be described with reference to FIGS. 1, 2 and 4 corresponding to the embodiment. As shown in FIGS. 1 and 2, a fiber reinforced resin leaf spring damage detection device according to the present invention includes fiber reinforced resin leaf springs 16 and 17 in which a large number of conductive fibers 17a extend in the longitudinal direction and are embedded. , A pair of connectors 27, 28, 32, 33 which are respectively fixed to both ends of the leaf springs 16, 17 and electrically connect both ends of a large number of conductive fibers 17 a, and a pair of connectors 27, 28, 32, 33. Connected to the power source 37 via a power source 37 and detecting means 38 for detecting a change in the electrical characteristic of the conductive fiber 17a due to cutting of at least a part of the fiber 17a of the conductive fiber 17a, and a change in the electrical characteristic of a predetermined value or more And an alarm means 46 for issuing an alarm when it reaches. Further, as shown in FIG. 4, a large number of conductive wires 71b may be embedded in the fiber reinforced resin plate spring 71 so as to extend in the longitudinal direction.
【０００６】[0006]
繊維強化樹脂製板ばね１７又は７１が繰返して撓むと、導電性繊維１７ａ又は 導電性線材７１ｂが繰返して伸縮することにより一部の繊維１７ａ又は線材７１ ｂが疲労により切断する。検出手段３８は一部の繊維１７ａ又は線材７１ｂの切 断によって繊維１７ａ又は線材７１ｂの電気的特性の変化が所定値以上に達した ときに、警報手段４６を作動させる。 When the leaf spring 17 or 71 made of fiber reinforced resin is repeatedly bent, the conductive fiber 17a or the conductive wire 71b is repeatedly expanded and contracted, so that some of the fibers 17a or the wire 71b are cut due to fatigue. The detection means 38 activates the alarm means 46 when a change in the electrical characteristics of the fiber 17a or the wire rod 71b reaches or exceeds a predetermined value due to the cutting of a part of the fiber 17a or the wire rod 71b.
【０００７】[0007]
次に本考案の実施例を図面に基づいて詳しく説明する。 図１〜図３に示すように、トラックの前輪のアクスルシャフト１１とシャシフ レーム１２のサイドメンバ１２ａ間には重ね板ばね１３がサイドメンバ１２ａに 平行に延びて介装される。この重ね板ばね１３は１枚の鋼板製板ばね１４と２枚 の繊維強化樹脂製板ばね１６，１７とを重ねて形成され、これらの板ばね１４， １６，１７はその略中央でアクスルシャフト１１にＵボルト１８を介して保持さ れる。重ね板ばね１３の上端に位置する鋼板製板ばね１４の前端はブラケット１ ９及びピン２１を介して枢着され、後端はブラケット２２に上端がピン２３を介 して枢着されたシャックル２４の下端にピン２６を介して枢着される（図２）。 Next, an embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1 to 3, a leaf spring 13 is interposed between the axle shaft 11 of the front wheel of the truck and the side member 12a of the chassis frame 12 so as to extend parallel to the side member 12a. This leaf spring 13 is formed by laminating one leaf spring 14 made of steel plate and two leaf springs 16 and 17 made of fiber reinforced resin, and these leaf springs 14, 16 and 17 are located substantially at the center thereof. 11 is held via U-bolts 18. The front end of the steel plate leaf spring 14 located at the upper end of the leaf spring 13 is pivotally attached via the bracket 19 and the pin 21, and the rear end is shackle 24 pivotally attached to the bracket 22 at the upper end via the pin 23. Is pivotally attached to the lower end of the pin via a pin 26 (FIG. 2).
【０００８】 ２枚の繊維強化樹脂性板ばね１６，１７のうち上側の板ばね１６の両端には一 対のコネクタ２７，２８を介して一対のケーブル２９，３１が接続され、これら のケーブル２９，３１はサイドメンバ１２ａに形成された通孔１２ｂ，１２ｃに それぞれ挿通される。また下側の板ばね１７の両端には一対のコネクタ３２，３ ３を介して一対のケーブル３４，３６が接続され、これらのケーブル３４，３６ は通孔１２ｂ，１２ｃにそれぞれ挿通される（図２）。これらの板ばね１６，１ ７は長さが異なるだけで構造は同一であるため、下側の板ばね１７を代表して説 明する。A pair of cables 29 and 31 are connected to both ends of the upper leaf spring 16 of the two fiber-reinforced resin leaf springs 16 and 17 via a pair of connectors 27 and 28. , 31 are respectively inserted into through holes 12b, 12c formed in the side member 12a. A pair of cables 34 and 36 are connected to both ends of the lower leaf spring 17 through a pair of connectors 32 and 33, and these cables 34 and 36 are inserted into the through holes 12b and 12c, respectively (Fig. 2). Since the leaf springs 16 and 17 have the same structure except for the lengths, the leaf spring 17 on the lower side will be described as a representative.
【０００９】 板ばね１７は帯板状の樹脂１７ｂに多数の導電性繊維であるカーボンファイバ １７ａを長手方向に延びて埋設することにより形成され（図１及び図３）、カー ボンファイバ１７ａの両端は樹脂１７ｂを溶解することにより一定長だけ露出さ れる（図１）。この例ではカーボンファイバ１７ａは多数のフィラメントから構 成される高弾性率糸である。一対のコネクタ３２，３３はその成形材料である導 電性ラバーを板ばね１７と一体成形しかつ加硫接着することにより板ばね１７の 両端にそれぞれ固着される。これらのコネクタ３２，３３の外面にはコネクタ３ ２，３３に導電性異物が電気的に接触しないように絶縁被膜（図示せず）が施さ れ、これらのコネクタ３２，３３により多数のカーボンファイバ１７ａの両端が それぞれ電気的に接続される（図１）。 また一対のコネクタ３２，３３にそれぞれ接続された一対のケーブル３４，３ ６は導電性ラバーを絶縁ラバーにより被覆することにより形成される。これらの ケーブル３４，３６には板ばね１７が繰返して撓むことにより繰返しの曲げ応力 が作用したり、前輪により跳ね上げられた小石等が当ったりするが、ケーブル３ ４，３６は絶縁ラバーにより被覆された導電性ラバーにより形成されているので 、殆ど損傷しないようになっている。The leaf spring 17 is formed by embedding a large number of carbon fibers 17a, which are conductive fibers, in a strip-shaped resin 17b so as to extend in the longitudinal direction (FIGS. 1 and 3), and both ends of the carbon fiber 17a. Is exposed for a certain length by dissolving the resin 17b (FIG. 1). In this example, the carbon fiber 17a is a high elastic modulus yarn composed of many filaments. The pair of connectors 32 and 33 are fixed to both ends of the leaf spring 17 by integrally molding a conductive rubber, which is a molding material thereof, with the leaf spring 17 and vulcanizing and adhering them. An insulating coating (not shown) is provided on the outer surfaces of the connectors 32 and 33 so that the conductive foreign matter does not come into electrical contact with the connectors 32 and 33. Both ends of each are electrically connected (Fig. 1). The pair of cables 34 and 36 connected to the pair of connectors 32 and 33, respectively, are formed by coating conductive rubber with insulating rubber. The leaf spring 17 is repeatedly bent on these cables 34 and 36, so that repeated bending stress is applied to them, and pebbles and the like bounced up by the front wheels are hit, but the cables 34 and 36 are made of insulating rubber. Since it is made of coated conductive rubber, it is hardly damaged.
【００１０】 一対のケーブル３４，３６は電源３７を介して検出手段３８に接続される。検 出手段３８は演算増幅器３９と、３つの抵抗体４１，４２，４３と、１つのダイ オード４４とを備える。演算増幅器３９は２つの入力端子３９ａ，３９ｂと１つ の出力端子３９ｃを有する。一方のケーブル３６は抵抗体４１を介して演算増幅 器３９の一方の入力端子３９ａに接続され、他方のケーブル３４は他方の入力端 子３９ｂに接続される。また一方の入力端子３９ａは抵抗体４２を介して接地さ れ、他方の入力端子３９ｂは抵抗体４３を介して接地される。多数のカーボンフ ァイバ１７ａと抵抗体４１は同一の抵抗を有するように設定され、抵抗体４２と 抵抗体４３は同一の抵抗を有するように設定される。演算増幅器３９の出力端子 ３９ｃにはダイオード４４を介して後述する電磁リレー４８のコイル部が接続さ れる。演算増幅器３９は一方の入力端子３９ａに加えている検出電圧Ｖ1から他 方の入力端子３９ｂに加えている検出電圧Ｖ2を引いた値に増幅度を掛けた出力 電圧Ｖ0が出力端子３９ｃに加わるようになっている（図１）。The pair of cables 34 and 36 are connected to a detecting means 38 via a power supply 37. The detecting means 38 includes an operational amplifier 39, three resistors 41, 42 and 43, and one diode 44. The operational amplifier 39 has two input terminals 39a and 39b and one output terminal 39c. One cable 36 is connected to one input terminal 39a of the operational amplifier 39 via the resistor 41, and the other cable 34 is connected to the other input terminal 39b. Further, one input terminal 39a is grounded via a resistor 42, and the other input terminal 39b is grounded via a resistor 43. The multiple carbon fibers 17a and the resistor 41 are set to have the same resistance, and the resistor 42 and the resistor 43 are set to have the same resistance. A coil portion of an electromagnetic relay 48, which will be described later, is connected to the output terminal 39c of the operational amplifier 39 via a diode 44. In the operational amplifier 39, an output voltage V 0 obtained by multiplying a value obtained by subtracting the detection voltage V 2 applied to the other input terminal 39b from the detection voltage V 1 applied to the one input terminal 39a and the amplification factor is output terminal 39c. (Fig. 1).
【００１１】 多数のカーボンファイバ１７ａの抵抗の変化が所定値以上に達したときに警報 を発する警報手段４６はブザー４７と、電磁リレー４８とを備え、電磁リレー４ ８のスイッチ部は電源３７にブザー４７を介して接続される（図１）。ブザー４ ７は図示しない運転席に設けられる。上側の板ばね１６のカーボンファイバ（図 示せず）は一対のコネクタ２７，２８及び一対のケーブル２９，３１を介して図 示しない別の検出手段及び警報手段に接続される。また図２において４９はショ ックアブソーバであり、サイドメンバ１２ａと重ね板ばね１３の間に介装される 。The alarm means 46 for issuing an alarm when the change in resistance of a large number of carbon fibers 17 a reaches a predetermined value or more includes a buzzer 47 and an electromagnetic relay 48, and the switch portion of the electromagnetic relay 48 is connected to the power source 37. It is connected via a buzzer 47 (Fig. 1). The buzzer 47 is provided in the driver's seat (not shown). The carbon fiber (not shown) of the upper leaf spring 16 is connected to another detection means and alarm means (not shown) via a pair of connectors 27, 28 and a pair of cables 29, 31. In FIG. 2, 49 is a shock absorber, which is interposed between the side member 12a and the leaf spring 13.
【００１２】 このように構成された繊維強化樹脂製板ばねの損傷検出装置の動作を説明する 。 トラックが悪路等を走行すると図示しない前輪が上下方向に振動するが、この 振動は重ね板ばね１３の撓み及びショックアブソーバ４９の伸縮により吸収され てシャシフレーム１２に殆ど伝達されない。鋼板性板ばね１４とともに繊維強化 樹脂製板ばね１６，１７が繰返し撓むと、埋設されたカーボンファイバ１７ａが 繰返し伸縮してファイバ１７ａの抵抗が繰返し変化する。この結果、検出電圧Ｖ 1 と検出電圧Ｖ2に僅かな差が生じ、Ｖ1とＶ2の差に増幅度を掛けた出力電圧Ｖ0 が電磁リレー４８のコイル部に加わる。しかし、この出力電圧Ｖ0は比較的小さ く、電磁リレー４８のスイッチ部は開いた状態に保たれる。The operation of the fiber-reinforced resin leaf spring damage detection device configured as described above will be described. When a truck travels on a bad road or the like, a front wheel (not shown) vibrates vertically, but this vibration is absorbed by bending of the leaf spring 13 and expansion / contraction of the shock absorber 49, and is hardly transmitted to the chassis frame 12. When the plate springs 16 and 17 made of fiber reinforced resin are repeatedly bent together with the steel plate leaf spring 14, the embedded carbon fiber 17a repeatedly expands and contracts, and the resistance of the fiber 17a repeatedly changes. As a result, the detection voltage V 1 And the detection voltage V2A slight difference occurs, V1And V2Output voltage V multiplied by the difference0 Is added to the coil portion of the electromagnetic relay 48. However, this output voltage V0Is relatively small and the switch part of the electromagnetic relay 48 is kept open.
【００１３】 繊維強化樹脂製板ばね１６，１７が更に繰返し撓むと、一部のファイバ１７ａ が疲労により切断する。このとき、ファイバ１７ａの抵抗が増大し、検出電圧Ｖ 2 が検出電圧Ｖ1より低くなってＶ1とＶ2に差が生じ、Ｖ1とＶ2の差に増幅度を掛 けた出力電圧Ｖ0が電磁リレー４８のコイル部に加わる。この出力電圧Ｖ0は大き く、電磁リレー４８のコイル部に流れる電流により電磁リレー４８のスイッチ部 が閉じる。この結果、ブザー４７に電流が流れてブザー４７が吹鳴するので、図 示しない運転者は繊維強化樹脂製板ばね１７が使用限界に達したこと、即ち板ば ね１７を交換しなければならないことを知ることができる。When the fiber-reinforced resin leaf springs 16 and 17 are further flexed, some of the fibers 17a are cut due to fatigue. At this time, the resistance of the fiber 17a increases, and the detection voltage V 2 Is the detection voltage V1Getting lower V1And V2Difference occurs, V1And V2Output voltage V multiplied by the degree of amplification0Is added to the coil portion of the electromagnetic relay 48. This output voltage V0The switch section of the electromagnetic relay 48 is closed by the current flowing through the coil section of the electromagnetic relay 48. As a result, a current flows through the buzzer 47 and the buzzer 47 blows. Therefore, the driver (not shown) has reached the limit of use of the fiber-reinforced resin leaf spring 17, that is, the leaf spring 17 must be replaced. You can know.
【００１４】 なお、上記実施例では導電性繊維であるカーボンファイバが埋設された繊維強 化樹脂製板ばねを挙げたが、これは一例であって図４に示すように、非導電性繊 維であるグラスファイバ７１ａが埋設された繊維強化樹脂製板ばね７１でもよい 。この場合、大きな繰返し応力が作用する板ばね７１の上縁近傍及び下縁近傍に 沿ってグラスファイバ７１ａと平行に多数の導電性線材である高弾性率の鋼線７ １ｂを樹脂７１ｃに埋設し、これらの鋼線７１ｂの両端に図示しない一対のコネ クタをそれぞれ固着し、更にこれらのコネクタには図示しないがケーブルを介し て鋼線の電気的特性の変化を検出する検出手段及び警報手段が接続される。 また、上記実施例では１枚の鋼板製板ばねと２枚の繊維強化樹脂製板ばねとを 重ねた重ね板ばねを挙げたが、２枚以上の鋼板製板ばねと１枚又は３枚以上の繊 維強化樹脂製板ばねとを重ねた重ね板ばねでもよい。 また、上記実施例では２枚の繊維強化樹脂製板ばねのうち下側の板ばねを検出 手段及び警報手段に接続し、上側の板ばねを別の検出手段及び警報手段に接続し たが、２枚の繊維強化樹脂製板ばねを並列に接続して単一の検出手段及び警報手 段に接続してもよい。 また、上記実施例では検出手段として演算増幅器を挙げたが、これに限らずカ ーボンファイバの抵抗を直接検出する抵抗計やカーボンファイバに流れる電流を 直接検出する電流計でもよい。この場合、一部のファイバが切断して、抵抗計に より検出されたファイバの抵抗が所定値より大きくなったとき、又は電流計によ り検出されたファイバに流れる電流が所定値より小さくなったときに、警報手段 が警報を発するように構成される。 更に、上記実施例では警報手段としてブザーを挙げたが、運転者に警報を発す ることができれば運転席に設けられたランプでもよい。In the above-mentioned embodiment, the fiber-reinforced resin leaf spring in which the carbon fiber which is the conductive fiber is embedded is mentioned, but this is an example and as shown in FIG. 4, the non-conductive fiber is used. The fiber spring 71 made of fiber reinforced resin in which the glass fiber 71a is embedded may be used. In this case, a large number of high-elasticity steel wires 71b, which are conductive wires, are embedded in the resin 71c in parallel with the glass fiber 71a along the vicinity of the upper edge and the lower edge of the leaf spring 71 on which large cyclic stress acts. A pair of connectors (not shown) are fixed to both ends of these steel wires 71b, and a detection means and an alarm means (not shown) for detecting changes in the electrical characteristics of the steel wires are connected to these connectors through cables. Connected. Further, in the above embodiment, the laminated leaf spring in which one leaf spring made of steel plate and two leaf springs made of fiber reinforced resin are superposed is mentioned, but two or more leaf springs made of steel plate and one or three or more leaf springs. It may be a laminated leaf spring in which the above-mentioned fiber-reinforced resin leaf spring is laminated. In the above embodiment, the lower leaf spring of the two fiber reinforced resin leaf springs was connected to the detection means and the alarm means, and the upper leaf spring was connected to the other detection means and the alarm means. The two fiber-reinforced resin leaf springs may be connected in parallel to connect to a single detection means and alarm means. Further, although the operational amplifier is mentioned as the detecting means in the above-mentioned embodiment, the present invention is not limited to this, and a resistance meter for directly detecting the resistance of the carbon fiber or an ammeter for directly detecting the current flowing through the carbon fiber may be used. In this case, when some fibers are cut and the resistance of the fiber detected by the resistance meter becomes higher than the specified value, or the current flowing through the fiber detected by the ammeter becomes smaller than the specified value. And the alarm means is configured to generate an alarm when triggered. Further, in the above embodiment, the buzzer is used as the warning means, but a lamp provided in the driver's seat may be used as long as it can give a warning to the driver.
【００１５】[0015]
以上述べたように、本考案によれば、繊維強化樹脂製板ばねの両端にそれぞれ 固着された一対のコネクタが多数の導電性繊維又は多数の導電性線材の両端をそ れぞれ電気的に接続し、検出手段が検出する繊維又は線材の少なくとも一部の切 断による繊維又は線材の電気的特性の変化が所定値以上に達したときに警報手段 が警報を発するように構成したので、繊維強化樹脂製板ばねの繰返しの撓みによ り少なくとも一部の繊維又は線材が疲労して切断したときに、検出手段が警報手 段を作動させ、車両の運転者は板ばねが使用限界に達したこと、即ち板ばねを交 換しなければならないことを知ることができる。 As described above, according to the present invention, a pair of connectors fixed to both ends of a fiber-reinforced resin leaf spring electrically connects both ends of a large number of conductive fibers or a large number of conductive wires, respectively. Since the alarm means is configured to give an alarm when the change in the electrical characteristics of the fiber or wire due to the disconnection of at least a part of the fiber or wire detected by the detecting means is connected, the fiber is connected. When at least a part of the fiber or wire is cut due to repeated bending of the leaf spring made of reinforced resin, the detection means activates the alarm means, and the vehicle driver reaches the limit of use of the leaf spring. It is possible to know what has been done, that is, the leaf spring must be replaced.
【図１】本考案実施例繊維強化樹脂製板ばねの損傷検出
装置の板ばね両端の縦断面、検出手段及び警報手段を含
む構成図。FIG. 1 is a configuration diagram including a vertical cross section of both ends of a leaf spring of a damage detection device for a leaf spring made of fiber reinforced resin according to an embodiment of the present invention, a detection means, and an alarm means.
【図２】その板ばねを含む車両の要部側面図。FIG. 2 is a side view of a main part of a vehicle including the leaf spring.
【図３】図２のＡ−Ａ線断面図。3 is a sectional view taken along the line AA of FIG.
【図４】別の実施例を示す図３に対応する断面図。FIG. 4 is a sectional view corresponding to FIG. 3 showing another embodiment.
１６，１７，７１ 繊維強化樹脂製板ばね １７ａ カーボンファイバ（導電性繊維） ２７，２８，３２，３３ コネクタ ３７ 電源 ３８ 検出手段 ４６ 警報手段 ７１ｂ 鋼線（導電性線材） 16,17,71 Fiber spring made of fiber reinforced resin 17a Carbon fiber (conductive fiber) 27,28,32,33 Connector 37 Power supply 38 Detection means 46 Warning means 71b Steel wire (conductive wire)
Claims (1)
性線材(71b)が長手方向に延びて埋設された繊維強化樹
脂製板ばね(16,17,71)と、 前記板ばね(16,17,71)の両端にそれぞれ固着され前記多
数の導電性繊維(17a)又は前記多数の導電性線材(71b)の
両端をそれぞれ電気的に接続する一対のコネクタ(27,2
8,32,33)と、 前記一対のコネクタ(27,28,32,33)に電源(37)を介して
接続され前記導電性繊維(17a)又は前記導電性線材(71b)
の少なくとも一部の繊維(17a)又は線材(71b)の切断によ
る前記導電性繊維(17a)又は前記導電性線材(71b)の電気
的特性の変化を検出する検出手段(38)と、 前記電気的特性の変化が所定値以上に達したときに警報
を発する警報手段(46)とを備えた繊維強化樹脂製板ばね
の損傷検出装置。1. A leaf spring (16, 17, 71) made of a fiber-reinforced resin, in which a large number of conductive fibers (17a) or a large number of conductive wires (71b) are embedded so as to extend in a longitudinal direction, and the leaf spring ( 16,17,71) a pair of connectors (27,2) which are respectively fixed to both ends of the plurality of electrically conductive fibers (17a) or electrically connect the both ends of the plurality of electrically conductive wires (71b).
8,32,33) and the pair of connectors (27,28,32,33) connected to the conductive fiber (17a) or the conductive wire (71b) via a power supply (37).
Of at least a part of the fibers (17a) or wire (71b) due to cutting of the conductive fiber (17a) or the conductive wire (71b) detection means for detecting a change in electrical characteristics (38), the electrical Of damage to a leaf spring made of fiber-reinforced resin, comprising an alarm means (46) for issuing an alarm when the change in the dynamic characteristics reaches a predetermined value or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8952892U JPH0647745U (en) | 1992-12-02 | 1992-12-02 | Damage detection device for leaf spring made of fiber reinforced resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8952892U JPH0647745U (en) | 1992-12-02 | 1992-12-02 | Damage detection device for leaf spring made of fiber reinforced resin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0647745U true JPH0647745U (en) | 1994-06-28 |
Family
ID=13973315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8952892U Pending JPH0647745U (en) | 1992-12-02 | 1992-12-02 | Damage detection device for leaf spring made of fiber reinforced resin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0647745U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016141329A (en) * | 2015-02-04 | 2016-08-08 | 川崎重工業株式会社 | Leaf spring state monitoring device for railway vehicle truck |
| JP2017052415A (en) * | 2015-09-10 | 2017-03-16 | 川崎重工業株式会社 | Method for manufacturing leaf spring with electrode for railroad vehicle carriage |
| JP2017509546A (en) * | 2014-01-16 | 2017-04-06 | イノテック・ライトウェイト・エンジニアリング・アンド・ポリマー・テクノロジー・ゲーエムベーハー | Wheel shaft, wheel shaft and manufacturing method thereof |
| KR20190007170A (en) * | 2017-07-12 | 2019-01-22 | 현대자동차주식회사 | Apparatus for notifying replacement time of composite leaf spring |
| KR20190070742A (en) * | 2017-12-13 | 2019-06-21 | 현대자동차주식회사 | Fracture indicator for composite material spring and installation method thereof |
| KR20200069588A (en) * | 2018-12-07 | 2020-06-17 | 현대자동차주식회사 | State monitoring system for suspension of vehicle |
-
1992
- 1992-12-02 JP JP8952892U patent/JPH0647745U/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017509546A (en) * | 2014-01-16 | 2017-04-06 | イノテック・ライトウェイト・エンジニアリング・アンド・ポリマー・テクノロジー・ゲーエムベーハー | Wheel shaft, wheel shaft and manufacturing method thereof |
| EP3254925A4 (en) * | 2015-02-04 | 2018-09-12 | Kawasaki Jukogyo Kabushiki Kaisha | Device for monitoring state of plate spring in railroad vehicular carriage |
| KR20170107504A (en) | 2015-02-04 | 2017-09-25 | 카와사키 주코교 카부시키 카이샤 | Plate spring condition monitoring device for railroad cars |
| CN107207018A (en) * | 2015-02-04 | 2017-09-26 | 川崎重工业株式会社 | The state monitoring apparatus of the leaf spring of railcar bogie |
| JP2016141329A (en) * | 2015-02-04 | 2016-08-08 | 川崎重工業株式会社 | Leaf spring state monitoring device for railway vehicle truck |
| US10964131B2 (en) | 2015-02-04 | 2021-03-30 | Kawasaki Jukogyo Kabushiki Kaisha | State monitoring device for plate spring of railcar bogie |
| JP2017052415A (en) * | 2015-09-10 | 2017-03-16 | 川崎重工業株式会社 | Method for manufacturing leaf spring with electrode for railroad vehicle carriage |
| KR20180050722A (en) * | 2015-09-10 | 2018-05-15 | 카와사키 주코교 카부시키 카이샤 | Manufacturing method of leaf spring for electrode of railroad car truck |
| EP3348448A4 (en) * | 2015-09-10 | 2019-05-08 | Kawasaki Jukogyo Kabushiki Kaisha | Method for manufacturing leafspring with electrodes for railcar truck |
| US10703394B2 (en) | 2015-09-10 | 2020-07-07 | Kawasaki Jukogyo Kabushiki Kaisha | Method of producing electrode-equipped plate spring of railcar bogie |
| KR20190007170A (en) * | 2017-07-12 | 2019-01-22 | 현대자동차주식회사 | Apparatus for notifying replacement time of composite leaf spring |
| KR20190070742A (en) * | 2017-12-13 | 2019-06-21 | 현대자동차주식회사 | Fracture indicator for composite material spring and installation method thereof |
| KR20200069588A (en) * | 2018-12-07 | 2020-06-17 | 현대자동차주식회사 | State monitoring system for suspension of vehicle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108819641B (en) | Elastic support with integrated load sensor for a suspension system of a motor vehicle | |
| KR100947387B1 (en) | Energy regeneration device for suspension system | |
| JPH0647745U (en) | Damage detection device for leaf spring made of fiber reinforced resin | |
| CN103476608B (en) | Vehicle chassis component | |
| DE502004001640D1 (en) | Resistance arrangement, manufacturing method and measuring circuit | |
| TWI602727B (en) | State monitoring device for leaf spring of trolley for railway vehicles | |
| JP6482549B2 (en) | Equipment for wear monitoring in multiple overhead lines | |
| WO1996037760A1 (en) | Mounting structure for a vehicle load measuring sensing element | |
| KR100287920B1 (en) | Sensing element | |
| Sergio et al. | On road tire deformation measurement system using a capacitive-resistive sensor | |
| ES2712904T3 (en) | Mechanical component with a force sensor | |
| WO2019025930A1 (en) | Method for manufacturing a composite twist-beam axle for a rear suspension of a vehicle | |
| JPS60114741A (en) | Detection for fatigue fracture of frp member | |
| CN109001524A (en) | A kind of vehicle quiescent current detection device and detection method | |
| KR20200069588A (en) | State monitoring system for suspension of vehicle | |
| EP0507975A1 (en) | Suspension system for a vehicle | |
| DE102016207890A1 (en) | Monitoring device for at least one electrically conductive spring of a vehicle | |
| DE10123381A1 (en) | Bicycle with active spring/damping elements controlled via signals from expansion and acceleration sensors attached to each wheel form | |
| RU113203U1 (en) | SUSPENSION FOR CONTINUOUS VEHICLE BRIDGES | |
| JPS60161544A (en) | Apparatus for detecting fatigue rupture of frp member | |
| JPH10311753A (en) | Load measuring apparatus for vehicle | |
| JPS60155943A (en) | Apparatus for detecting fatigue fracture of frp member | |
| CN108909390A (en) | Rear axle assy in a kind of equalizing type of suspension and suspension frame | |
| KR102478128B1 (en) | Non-linear structure of spring suspension of composite material | |
| JPS6332483Y2 (en) |