JP2012184944A - Cargo transportation vehicle - Google Patents
Cargo transportation vehicle Download PDFInfo
- Publication number
- JP2012184944A JP2012184944A JP2011046391A JP2011046391A JP2012184944A JP 2012184944 A JP2012184944 A JP 2012184944A JP 2011046391 A JP2011046391 A JP 2011046391A JP 2011046391 A JP2011046391 A JP 2011046391A JP 2012184944 A JP2012184944 A JP 2012184944A
- Authority
- JP
- Japan
- Prior art keywords
- shielding plate
- transmission
- speed sensor
- vehicle speed
- electromagnetic
- 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
- Body Structure For Vehicles (AREA)
Abstract
Description
本発明は、漏れ磁束による電磁式車速センサの故障がない貨物搬送車両に関する。 The present invention relates to a freight transport vehicle in which there is no failure of an electromagnetic vehicle speed sensor due to leakage magnetic flux.
車両（自動車）においては、法規に基づき、運転室前部に設けられたインストルメントパネルに車速が表示されなければならない。このための車速センサとして、一般に電磁式車速センサが使用されている。電磁式車速センサは、一般に変速機に取り付けられる。 In vehicles (automobiles), the vehicle speed must be displayed on the instrument panel provided in the front of the cab based on laws and regulations. As a vehicle speed sensor for this purpose, an electromagnetic vehicle speed sensor is generally used. The electromagnetic vehicle speed sensor is generally attached to a transmission.
図６に示した変速機１０１は、図示しないクラッチに駆動され９段変速可能な主変速部１０２と図示しないプロペラシャフトを駆動し２段変速可能な後置補助変速機（レンジ）１０３とが直列に連結されており、総合で１８段変速可能な変速機１０１である。主変速部１０２には９段変速を実現するために多数のギアとその切替機構（公知であり、詳細は図示しない）が組み込まれているため、主変速部１０２は４段や５段変速用の変速機に比べて前後に長い。後置補助変速機１０３の長さも加味すると、変速機１０１は顕著に前後に長い。変速機１０１の後端部には、後置補助変速機１０３と同軸に出力軸１０４が配置される。出力軸１０４の最後端はプロペラシャフトが連結されるフランジ１０５となっている。電磁式車速センサ１０６は、出力軸１０４の回転を検出できるよう、変速機１０１の後端部に設けられる。 A transmission 101 shown in FIG. 6 includes a main transmission 102 that is driven by a clutch (not shown) and capable of nine speeds and a rear auxiliary transmission (range) 103 that drives a propeller shaft (not shown) and is capable of two speeds. Is a transmission 101 that is capable of shifting in total 18 steps. Since the main transmission unit 102 incorporates a large number of gears and a switching mechanism (known in detail, not shown) for realizing a nine-speed transmission, the main transmission unit 102 is used for four-speed and five-speed transmission. Longer in front and back compared to other transmissions. Taking into account the length of the rear auxiliary transmission 103, the transmission 101 is significantly longer in the front-rear direction. An output shaft 104 is arranged at the rear end of the transmission 101 coaxially with the rear auxiliary transmission 103. The rear end of the output shaft 104 is a flange 105 to which the propeller shaft is connected. The electromagnetic vehicle speed sensor 106 is provided at the rear end of the transmission 101 so that the rotation of the output shaft 104 can be detected.
変速機には、図６に示した変速機１０１のほかに、クラッチと主変速部１０２との間に前置補助変速機（スプリッタ）が設けられたもの、前置補助変速機や後置補助変速機１０３がなく主変速部１０２だけのものなど多様な形式があり、変速可能な段数も多様であるが、いずれの変速機でも、電磁式車速センサ１０６は、出力軸１０４の回転を検出できるよう、変速機の後端部に設けられる。 In addition to the transmission 101 shown in FIG. 6, the transmission includes a front auxiliary transmission (splitter) provided between the clutch and the main transmission unit 102, a front auxiliary transmission and a rear auxiliary. There are various types such as the one without the transmission 103 and only the main transmission unit 102, and the number of shiftable stages is also various. In any transmission, the electromagnetic vehicle speed sensor 106 can detect the rotation of the output shaft 104. As such, it is provided at the rear end of the transmission.
電磁式車速センサ１０６は、センサ歯車１０７と電磁ピックアップ１０８とからなる。センサ歯車１０７は、鉄製の歯車であり、変速機１０１の出力軸１０４に対してスプラインによって嵌合されることで、出力軸１０４に一体化される。電磁ピックアップ１０８は、永久磁石とコイルが組み合わされて構成される（公知であり、詳細は図示しない）。電磁ピックアップ１０８は、センサ歯車１０７の山が通過する空間に臨ませて変速機１０１の上に取り付けられる。 The electromagnetic vehicle speed sensor 106 includes a sensor gear 107 and an electromagnetic pickup 108. The sensor gear 107 is an iron gear and is integrated with the output shaft 104 by being fitted to the output shaft 104 of the transmission 101 by a spline. The electromagnetic pickup 108 is configured by combining a permanent magnet and a coil (known in the art and not shown in detail). The electromagnetic pickup 108 is mounted on the transmission 101 so as to face the space through which the mountain of the sensor gear 107 passes.
電磁ピックアップ１０８が臨む空間にセンサ歯車１０７の山が来るとコイルを通る磁束が増え、電磁ピックアップ１０８が臨む空間にセンサ歯車１０７の谷が来るとコイルを通る磁束が減る。この磁束変化によりコイルに起電力が生じる。出力軸１０４が回転するとセンサ歯車１０７が回転し、電磁ピックアップ１０８が臨む空間をセンサ歯車１０７の山と谷が交互に通過するため、電磁ピックアップ１０８のコイルに接続された電気回路には断続的にパルス信号が得られ、このパルス信号の周期から出力軸１０４の回転速度が計算され車速に換算される。 When the peak of the sensor gear 107 comes in the space where the electromagnetic pickup 108 faces, the magnetic flux passing through the coil increases, and when the valley of the sensor gear 107 comes in the space where the electromagnetic pickup 108 faces, the magnetic flux passing through the coil decreases. This change in magnetic flux generates an electromotive force in the coil. When the output shaft 104 rotates, the sensor gear 107 rotates, and the peaks and valleys of the sensor gear 107 alternately pass through the space where the electromagnetic pickup 108 faces. Therefore, the electric circuit connected to the coil of the electromagnetic pickup 108 is intermittently connected. A pulse signal is obtained, and the rotational speed of the output shaft 104 is calculated from the period of the pulse signal and converted to a vehicle speed.
なお、電磁式車速センサ１０６は、変速機１０１の主軸あるいは対抗軸の回転を検出するように変速機１０１の前端部や中央部に設けられてもよいが、その場合、選択されているギヤ段に応じて異なる換算比で車速が計算される必要がある。 The electromagnetic vehicle speed sensor 106 may be provided at the front end or the center of the transmission 101 so as to detect the rotation of the main shaft or the counter shaft of the transmission 101. In this case, the selected gear stage is used. The vehicle speed needs to be calculated with different conversion ratios depending on the vehicle.
図７に示されるように、貨物を積載するための荷台を備えた貨物搬送車両（トラック）２０１では、エンジン２０２が運転室２０３の下に搭載され、エンジン２０２の後方に変速機１０１が搭載される。荷台２０４は運転室２０３の後ろに位置し、荷台前壁が運転室後壁に接するか、あるいは運転室後壁から若干のオフセットを有する。この種の貨物搬送車両では、エンジン２０２の前後位置やエンジン２０２の長さにもよるが、変速機１０１の全体もしくは一部が荷台２０４の下に突き出る。図６で説明したように、変速機１０１が前後に長いため、変速機１０１の後端部にある出力軸１０４が荷台２０４の下に位置する。 As shown in FIG. 7, in a cargo transport vehicle (truck) 201 equipped with a loading platform for loading cargo, an engine 202 is mounted under a cab 203 and a transmission 101 is mounted behind the engine 202. The The loading platform 204 is located behind the cab 203, and the front wall of the loading platform contacts the cab rear wall or has a slight offset from the cab rear wall. In this type of freight transport vehicle, depending on the longitudinal position of the engine 202 and the length of the engine 202, the whole or a part of the transmission 101 protrudes under the loading platform 204. As described with reference to FIG. 6, since the transmission 101 is long in the front-rear direction, the output shaft 104 at the rear end of the transmission 101 is positioned below the loading platform 204.
図８に示されるように、トレーラ式の貨物搬送車両３０１は、荷台がなく独立して走行可能なトラクタ３０２と、荷台３０３を有しトラクタ３０２に連結されるトレーラ３０４とからなる。トレーラ式の貨物搬送車両３０１では、運転室３０５の後ろには左右の縦骨格材３０６が延びており、縦骨格材３０６の後端部にトレーラ連結用の連結座３０７が設けられる。この連結座３０７にトレーラ３０４の前端部が連結される。変速機１０１は、荷台３０３から前方向に離れているため、荷台３０３の下にはない。 As shown in FIG. 8, the trailer-type freight transport vehicle 301 includes a tractor 302 that can travel independently without a loading platform, and a trailer 304 that has a loading platform 303 and is connected to the tractor 302. In the trailer type freight transport vehicle 301, left and right vertical skeleton members 306 extend behind the cab 305, and a trailer connecting seat 307 is provided at the rear end of the vertical skeleton member 306. The front end of the trailer 304 is connected to the connecting seat 307. Since the transmission 101 is away from the loading platform 303 in the forward direction, the transmission 101 is not under the loading platform 303.
ところで、図７の貨物搬送車両２０１（図８の貨物搬送車両３０１も同様）において、荷台２０４に鉄屑等の鉄材料が積載されて搬送される場合、荷の積み上げ・積み下ろしに電磁石からなるリフティングマグネット４０１が使用される。大量の荷の積み上げ・積み下ろしが行われる製鉄所や港湾など大規模な事業所では、特許文献１に記載されるような車載用のリフティングマグネットではなく、大型で強力なリフティングマグネット４０１が使用される。例えば、小片に破砕処理された鉄屑であるスクラップダストが大量に取り扱われる製鉄所には、横幅（車両の左右）２ｍ、長さ（車両の前後）３ｍもあるリフティングマグネット４０１が備わっている。この種のリフティングマグネット４０１では、数百アンペアにもなる励磁電流が流され、例えば、１０ｔトラックを吸着して吊り上げるほどの強力な磁力が得られる。 By the way, in the freight transport vehicle 201 in FIG. 7 (the same applies to the freight transport vehicle 301 in FIG. 8), when iron material such as iron scrap is loaded on the loading platform 204 and transported, lifting made of electromagnets for loading and unloading the load A magnet 401 is used. In large-scale establishments such as steelworks and harbors where a large amount of loads are loaded and unloaded, a large and powerful lifting magnet 401 is used instead of the in-vehicle lifting magnet described in Patent Document 1. . For example, an iron mill that handles a large amount of scrap dust, which is iron scraps crushed into small pieces, is provided with a lifting magnet 401 having a width (left and right of the vehicle) of 2 m and a length (front and rear of the vehicle) of 3 m. In this type of lifting magnet 401, an exciting current of several hundred amperes flows, and for example, a strong magnetic force that attracts and lifts a 10t track can be obtained.
製鉄所では、貨物搬送車両２０１の荷台２０４に積載されたスクラップダストＤがリフティングマグネット４０１に吸着されて積み下ろしされる。荷台２０４の床に残ったスクラップダストＤを浚う目的で、リフティングマグネット４０１が荷台２０４の床に着かない適宜な高さで左右、前後に掃引されると、荷台２０４の床からスクラップダストＤが飛び上がるように吸引されていく。 At the steelworks, the scrap dust D loaded on the loading platform 204 of the cargo transport vehicle 201 is attracted to the lifting magnet 401 and unloaded. For the purpose of collecting the scrap dust D remaining on the floor of the loading platform 204, when the lifting magnet 401 is swept left and right and back and forth at an appropriate height that does not reach the floor of the loading platform 204, the scrap dust D is removed from the floor of the loading platform 204. It is sucked like jumping up.
この製鉄所で、貨物搬送車両２０１からスクラップダストＤの積み下ろしを行うとき、電磁式車速センサ１０６の故障が発生することが報告された。リフティングマグネット４０１からの漏れ磁束が電磁式車速センサ１０６に入り、この漏れ磁束の大きさが電磁式車速センサ１０６の耐用限界を超えため、電磁式車速センサ１０６が故障したものと考えられる。 It has been reported that when the scrap dust D is loaded and unloaded from the cargo transport vehicle 201 at this steelworks, a failure of the electromagnetic vehicle speed sensor 106 occurs. The leakage magnetic flux from the lifting magnet 401 enters the electromagnetic vehicle speed sensor 106, and the magnitude of this leakage magnetic flux exceeds the service life limit of the electromagnetic vehicle speed sensor 106, so it is considered that the electromagnetic vehicle speed sensor 106 has failed.
電磁式車速センサ１０６が故障すると、車速が表示不能となるため、法規上、貨物搬送車両２０１の走行が不可能となる。また、電磁式車速センサ１０６が故障すると、車速や出力軸回転情報を利用する様々の電子制御に不具合が生じる。 If the electromagnetic vehicle speed sensor 106 breaks down, the vehicle speed cannot be displayed, so that the cargo transport vehicle 201 cannot travel according to the law. Further, when the electromagnetic vehicle speed sensor 106 breaks down, various electronic controls using the vehicle speed and output shaft rotation information cause problems.
そこで、本発明の目的は、上記課題を解決し、漏れ磁束による電磁式車速センサの故障がない貨物搬送車両を提供することにある。 Accordingly, an object of the present invention is to provide a freight transport vehicle that solves the above-described problems and does not have a failure of an electromagnetic vehicle speed sensor due to leakage magnetic flux.
上記目的を達成するために本発明の貨物搬送車両は、荷台の下に変速機が配置され、前記変速機に出力軸の回転を検出する電磁式車速センサが取り付けられた貨物搬送車両において、前記荷台の下に前記電磁式車速センサを磁気遮蔽する磁気遮蔽板が設けられたものである。 In order to achieve the above object, a freight transport vehicle according to the present invention is a freight transport vehicle in which a transmission is disposed under a loading platform, and an electromagnetic vehicle speed sensor that detects rotation of an output shaft is attached to the transmission. A magnetic shielding plate for magnetically shielding the electromagnetic vehicle speed sensor is provided under the loading platform.
前記磁気遮蔽板は、前記磁気遮蔽板がない場合に前記荷台の上から前記電磁式車速センサに向かう漏れ磁束が通る場所に配置されてもよい。 The magnetic shielding plate may be disposed at a location where a leakage magnetic flux from the top of the cargo bed toward the electromagnetic vehicle speed sensor passes when the magnetic shielding plate is not provided.
前記磁気遮蔽板は、右側縦骨格材と左側縦骨格材に渡して取り付けられてもよい。 The magnetic shielding plate may be attached across the right vertical frame material and the left vertical frame material.
前記磁気遮蔽板は、前記変速機の上を覆う上遮蔽板と、前記変速機の左右と下を覆う下遮蔽板とを有してもよい。 The magnetic shielding plate may include an upper shielding plate that covers the transmission, and a lower shielding plate that covers the left and right sides and the bottom of the transmission.
本発明は次の如き優れた効果を発揮する。 The present invention exhibits the following excellent effects.
（１）漏れ磁束による電磁式車速センサの故障がない。 (1) There is no failure of the electromagnetic vehicle speed sensor due to leakage magnetic flux.
以下、本発明の一実施形態を添付図面に基づいて詳述する。 Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
図１及び図２に示されるように、本発明に係る貨物搬送車両１は、荷台２０４の下に変速機１０１が配置され、変速機１０１に出力軸１０４の回転を検出する電磁式車速センサ１０６が取り付けられた貨物搬送車両１において、荷台２０４の下に電磁式車速センサ１０６を磁気遮蔽する磁気遮蔽板２が設けられたものである。 As shown in FIGS. 1 and 2, in the freight transport vehicle 1 according to the present invention, a transmission 101 is disposed under a loading platform 204, and an electromagnetic vehicle speed sensor 106 that detects the rotation of an output shaft 104 in the transmission 101. Is provided with a magnetic shielding plate 2 that magnetically shields the electromagnetic vehicle speed sensor 106 under the loading platform 204.
図７の貨物搬送車両２０１との比較から分かるように、図１の貨物搬送車両１は磁気遮蔽板２が設けられたことを特徴とする。透明な斜線ハッチング付きで示された磁気遮蔽板２は、変速機１０１の上を覆う上遮蔽板２Ｔと、変速機１０１の左右と下を覆う下遮蔽板２Ｂとを有し、透明な格子点ハッチング付きで示された左右の縦骨格材２０５間に渡して取り付けられる。左右の縦骨格材２０５は、鉄製であり、貨物搬送車両１のフレームを構成するものである。上遮蔽板２Ｔと下遮蔽板２Ｂとの間は、縦骨格材２０５で塞がれており、縦骨格材２０５が磁気遮蔽に利用される。 As can be seen from a comparison with the freight transport vehicle 201 in FIG. 7, the freight transport vehicle 1 in FIG. 1 is characterized in that a magnetic shielding plate 2 is provided. The magnetic shielding plate 2 shown with transparent hatching has an upper shielding plate 2T that covers the top of the transmission 101, and a lower shielding plate 2B that covers the left and right and the bottom of the transmission 101. Attached across the left and right vertical skeleton members 205 shown with hatching. The left and right vertical skeleton members 205 are made of iron and constitute a frame of the cargo transport vehicle 1. The space between the upper shielding plate 2T and the lower shielding plate 2B is closed by the vertical skeleton material 205, and the vertical skeleton material 205 is used for magnetic shielding.
磁気遮蔽板２は、変速機１０１の中央部から後端部にかけて前後方向に所定の長さを有し、電磁式車速センサ１０６が配置されている変速機１０１の後端部を上下左右から覆い、前後は開放されている。磁気遮蔽板２の前後方向の長さ及び前後方向の位置は、実験に基づき定められる。具体的には、磁気遮蔽板２がない場合に荷台２０４の上のリフティングマグネット４０１から電磁式車速センサ１０６に向かう漏れ磁束が通る場所を磁気遮蔽板２が占めるように定められる。 The magnetic shielding plate 2 has a predetermined length in the front-rear direction from the center portion to the rear end portion of the transmission 101, and covers the rear end portion of the transmission 101 where the electromagnetic vehicle speed sensor 106 is disposed from the upper, lower, left, and right sides. The front and rear are open. The length in the front-rear direction and the position in the front-rear direction of the magnetic shielding plate 2 are determined based on experiments. Specifically, when the magnetic shielding plate 2 is not provided, the magnetic shielding plate 2 is determined to occupy a place where the leakage magnetic flux from the lifting magnet 401 on the loading platform 204 toward the electromagnetic vehicle speed sensor 106 passes.
図３に示されるように、磁気遮蔽板２を構成する上遮蔽板２Ｔと下遮蔽板２Ｂは、いずれも鉄板を折り曲げ加工して製造されている。上遮蔽板２Ｔは、縦骨格材２０５（右側縦骨格材２０５Ｒ、左側縦骨格材２０５Ｌ）に固定された左右のアングル材２Ａと、左右のアングル材２Ａに固定されて各縦骨格材２０５よりも左右にせり出した平板材２Ｐとを有する。平板材２Ｐのせり出し幅は、実験に基づき、リフティングマグネット４０１から電磁式車速センサ１０６への漏れ磁束が遮蔽できるよう定められる。 As shown in FIG. 3, the upper shielding plate 2T and the lower shielding plate 2B constituting the magnetic shielding plate 2 are both manufactured by bending an iron plate. The upper shielding plate 2T is fixed to the left and right angle members 2A fixed to the vertical frame material 205 (the right vertical frame material 205R and the left vertical frame material 205L), and fixed to the left and right angle members 2A. And a flat plate 2P protruding to the left and right. The protruding width of the flat plate 2P is determined based on experiments so that the leakage magnetic flux from the lifting magnet 401 to the electromagnetic vehicle speed sensor 106 can be shielded.
以下、本発明者らが行った磁気遮蔽の実験の結果を説明する。 Hereinafter, the result of the magnetic shielding experiment conducted by the present inventors will be described.
本発明者らは、図８に示したようなトレーラ式の貨物搬送車両３０１や図には示さなかったがダンプ式の貨物搬送車両では、電磁式車速センサ１０６の故障が全く発生せず、図７に示した貨物搬送車両２０１のみに電磁式車速センサ１０６の故障が発生することから、リフティングマグネット４０１から電磁式車速センサ１０６までの距離が離れていると電磁式車速センサ１０６を通る漏れ磁束が小さいと考えた。ダンプ式の貨物搬送車両の場合、荷台がチルトするのでクリアランスのため荷台前壁が運転室後壁から大きくオフセットしており、荷台上を掃引されるリフティングマグネット４０１が電磁式車速センサ１０６の真上には来にくい。これに対し、図７の貨物搬送車両２０１では荷台２０４上を掃引されるリフティングマグネット４０１が電磁式車速センサ１０６の真上に来る。このため電磁式車速センサ１０６を通る漏れ磁束が大きいと思われる。 In the trailer type freight transport vehicle 301 as shown in FIG. 8 and the dump type freight transport vehicle, the inventors have found that the electromagnetic vehicle speed sensor 106 does not fail at all. 7 occurs only in the freight transport vehicle 201 shown in FIG. 7, and therefore, when the distance from the lifting magnet 401 to the electromagnetic vehicle speed sensor 106 is large, the leakage magnetic flux passing through the electromagnetic vehicle speed sensor 106 is increased. I thought it was small. In the case of a dump-type freight transport vehicle, the loading platform tilts so that the front wall of the loading platform is greatly offset from the rear wall of the cab for clearance, and the lifting magnet 401 that is swept over the loading platform is directly above the electromagnetic vehicle speed sensor 106. It is hard to come to. On the other hand, in the freight transport vehicle 201 in FIG. 7, the lifting magnet 401 swept on the loading platform 204 comes directly above the electromagnetic vehicle speed sensor 106. For this reason, it is considered that the leakage magnetic flux passing through the electromagnetic vehicle speed sensor 106 is large.
本発明者らは、図４に示されるように、磁気遮蔽板２として変速機１０１の上を覆う上遮蔽板２Ｔと、変速機１０１の左右と下を覆う下遮蔽板２Ｂとを作製し、上遮蔽板２Ｔと下遮蔽板２Ｂの着脱の組み合わせを変更しつつ、荷台２０４上でリフティングマグネット４０１を掃引したとき、電磁式車速センサ１０６が故障するかどうかを実験した。その結果、上遮蔽板２Ｔが設けられない場合は電磁式車速センサ１０６が故障するが、上遮蔽板２Ｔが設けられた場合、下遮蔽板２Ｂが設けられるか否かにかかわらず、電磁式車速センサ１０６が故障しないことが確認された。 As shown in FIG. 4, the present inventors produce an upper shielding plate 2T that covers the top of the transmission 101 as the magnetic shielding plate 2, and a lower shielding plate 2B that covers the left and right and the bottom of the transmission 101, An experiment was conducted as to whether or not the electromagnetic vehicle speed sensor 106 would fail when the lifting magnet 401 was swept on the loading platform 204 while changing the combination of attaching and detaching the upper shielding plate 2T and the lower shielding plate 2B. As a result, when the upper shielding plate 2T is not provided, the electromagnetic vehicle speed sensor 106 fails, but when the upper shielding plate 2T is provided, the electromagnetic vehicle speed is determined regardless of whether the lower shielding plate 2B is provided. It was confirmed that the sensor 106 did not fail.
ところが、リフティングマグネット４０１において直流電源に対するコイルの接続形態が異なると、上遮蔽板２Ｔが設けられた場合でも、電磁式車速センサ１０６が故障することが確認された。 However, it was confirmed that the electromagnetic vehicle speed sensor 106 failed even when the upper shielding plate 2T was provided if the connection form of the coil to the DC power source in the lifting magnet 401 was different.
ここでリフティングマグネット４０１について説明する。 Here, the lifting magnet 401 will be described.
リフティングマグネット４０１は、図示しない内部のコイルに直流の励磁電流が流されると、下面の中央部と周辺部に互いに逆極性の磁極が生じるようになっている。しかし、中央部と周辺部のどちらがＳ極、Ｎ極になるかは、法規や仕様上の規定が全くない。このため、事業所ではコイルの両端が直流電源の正・負極に適宜に接続されており、リフティングマグネット４０１単体ごとに中央部がＮ極である場合や、中央部がＳ極である場合が混在する。 The lifting magnet 401 is configured such that when a direct current excitation current is passed through an internal coil (not shown), magnetic poles having opposite polarities are generated at the central portion and the peripheral portion of the lower surface. However, there is no regulation or specification on whether the central part or the peripheral part is the S pole or the N pole. For this reason, both ends of the coil are appropriately connected to the positive and negative electrodes of the DC power supply in the office, and there are cases where the central part is the N pole or the central part is the S pole for each lifting magnet 401. To do.
前述の実験では、リフティングマグネット４０１の中央部がＮ極であった。その結果は、既に述べたように、上遮蔽板２Ｔのみがあれば、電磁式車速センサ１０６は故障しない。しかし、リフティングマグネット４０１の中央部がＳ極となるようコイルの接続を入れ替えると、実験結果は異なる。 In the above-described experiment, the center portion of the lifting magnet 401 has the N pole. As a result, as already described, if only the upper shielding plate 2T is provided, the electromagnetic vehicle speed sensor 106 does not break down. However, if the connection of the coil is switched so that the center portion of the lifting magnet 401 becomes the south pole, the experimental results are different.
図５に示されるように、上遮蔽板２Ｔが設けられた状態で、下遮蔽板２Ｂが設けられた場合と設けられない場合に、荷台２０４上でリフティングマグネット４０１を掃引したとき、電磁式車速センサ１０６が故障するかどうかを実験した。この実験では、下遮蔽板２Ｂが設けられない場合は電磁式車速センサ１０６が故障するが、下遮蔽板２Ｂが設けられた場合、電磁式車速センサ１０６が故障しないことが確認された。 As shown in FIG. 5, when the lifting magnet 401 is swept on the loading platform 204 with and without the lower shielding plate 2 </ b> B provided with the upper shielding plate 2 </ b> T, the electromagnetic vehicle speed is increased. An experiment was conducted to determine whether the sensor 106 failed. In this experiment, it was confirmed that the electromagnetic vehicle speed sensor 106 fails when the lower shielding plate 2B is not provided, but the electromagnetic vehicle speed sensor 106 does not fail when the lower shielding plate 2B is provided.
実験結果をまとめると、リフティングマグネット４０１の中央部がＮ極である場合は、上遮蔽板２Ｔのみがあれば電磁式車速センサ１０６は故障しないが、リフティングマグネット４０１の中央部がＳ極である場合は、上遮蔽板２Ｔと下遮蔽板２Ｂの両方がなければ、電磁式車速センサ１０６が故障する。 Summarizing the experimental results, when the central part of the lifting magnet 401 has the N pole, the electromagnetic vehicle speed sensor 106 does not fail if only the upper shielding plate 2T is provided, but the central part of the lifting magnet 401 has the S pole. If both the upper shielding plate 2T and the lower shielding plate 2B are absent, the electromagnetic vehicle speed sensor 106 fails.
実験結果に基づいて磁束の通り道を推測すると、図４に示されるように、リフティングマグネット４０１の中央部がＮ極である場合、Ｎ極からほぼ下向きに出た磁束は、上遮蔽板２Ｔに至ると上遮蔽板２Ｔの肉厚内を左右に通り、Ｓ極に対向する箇所からＳ極に向かうものと思われる。これに対し、図５に示されるように、リフティングマグネット４０１の中央部がＳ極である場合、Ｎ極からは、ほぼ下向き出る磁束の他に左右に拡がる磁束があると思われる。左右に拡がる磁束は、上遮蔽板２Ｔのせり出しを迂回し、下遮蔽板２Ｂがなければ変速機１０１の左右両側あるいは下から変速機１０１に入ると思われる。下遮蔽板２Ｂがある場合、上遮蔽板２Ｔのせり出しを迂回した磁束は、下遮蔽板２Ｂに至ると下遮蔽板２Ｂの肉厚内を通り、左右の縦骨格材２０５、上遮蔽板２Ｔを経てＳ極に対向する箇所からＳ極に向かうものと思われる。極性が反転すると磁束の通り道が大きく異なる理由は不明であるが、電磁式車速センサ１０６の故障という実験結果からこのような推測ができる。 When the path of the magnetic flux is estimated based on the experimental result, as shown in FIG. 4, when the central portion of the lifting magnet 401 is an N pole, the magnetic flux that has come out substantially downward from the N pole reaches the upper shielding plate 2T. And it seems that it goes to the S pole from the part which passes the inside of the thickness of the upper shielding board 2T to the left and right and faces the S pole. On the other hand, as shown in FIG. 5, when the central portion of the lifting magnet 401 is the south pole, it is considered that there is a magnetic flux that spreads to the left and right from the north pole in addition to the magnetic flux that protrudes substantially downward. The magnetic flux that spreads to the left and right bypasses the protrusion of the upper shielding plate 2T, and if there is no lower shielding plate 2B, it seems that the transmission 101 enters the transmission 101 from both the left and right sides or the bottom of the transmission 101. When there is the lower shielding plate 2B, the magnetic flux that bypasses the protrusion of the upper shielding plate 2T passes through the thickness of the lower shielding plate 2B and reaches the left and right vertical skeleton members 205 and the upper shielding plate 2T. It seems that it goes to the S pole from the part facing the S pole after that. The reason why the path of the magnetic flux differs greatly when the polarity is reversed is unknown, but such an estimation can be made from the experimental result that the electromagnetic vehicle speed sensor 106 has failed.
いずれの実験でも磁気遮蔽板２の前後には、変速機１０１を前方・後方から覆う遮蔽部材は設けておらず、それでも電磁式車速センサ１０６の故障がないことから、磁気遮蔽板２の前後から電磁式車速センサ１０６に回り込む磁束はないものと思われる。 In any experiment, there is no shielding member that covers the transmission 101 from the front and the rear before and after the magnetic shielding plate 2, and there is no failure of the electromagnetic vehicle speed sensor 106. It appears that there is no magnetic flux that wraps around the electromagnetic vehicle speed sensor 106.
以上の実験結果から、上遮蔽板２Ｔと下遮蔽板２Ｂとを有する磁気遮蔽板２が設けられることで、リフティングマグネット４０１におけるコイルの接続形態によらず、電磁式車速センサ１０６の故障が防止できることが実証された。 From the above experimental results, by providing the magnetic shielding plate 2 having the upper shielding plate 2T and the lower shielding plate 2B, the failure of the electromagnetic vehicle speed sensor 106 can be prevented regardless of the coil connection form in the lifting magnet 401. Has been demonstrated.
以上説明したように、本発明の貨物搬送車両１は、荷台２０４の下に電磁式車速センサ１０６を磁気遮蔽する磁気遮蔽板２が設けられたので、製鉄所でスクラップダストＤの積み下ろしを行う際などのリフティングマグネット４０１からの漏れ磁束による電磁式車速センサ１０６の故障が防止される。 As described above, the freight transport vehicle 1 of the present invention is provided with the magnetic shielding plate 2 that magnetically shields the electromagnetic vehicle speed sensor 106 under the loading platform 204, so when the scrap dust D is loaded and unloaded at the steelworks. Thus, failure of the electromagnetic vehicle speed sensor 106 due to leakage magnetic flux from the lifting magnet 401 is prevented.
磁気遮蔽板２は、変速機１０１の前後を覆う必要がないので、アングル材２Ａ、平板材２Ｐ、下遮蔽板２Ｂのような単純形状とすることができ、鉄板を折り曲げ加工するだけで作製できる。 Since the magnetic shielding plate 2 does not need to cover the front and rear of the transmission 101, the magnetic shielding plate 2 can have a simple shape such as the angle member 2A, the flat plate member 2P, and the lower shielding plate 2B, and can be produced simply by bending the iron plate. .
磁気遮蔽板２は、縦骨格材２０５に取り付けるようにしたので、取り付けやすい。磁気遮蔽板２を右側縦骨格材２０５Ｒと左側縦骨格材２０５Ｌに渡して取り付けることで、これら左右の縦骨格材２０５も遮蔽に働き、磁束が入り込む隙間がなくなる。 Since the magnetic shielding plate 2 is attached to the vertical frame material 205, it is easy to attach. By attaching the magnetic shielding plate 2 to the right vertical skeleton material 205R and the left vertical skeleton material 205L, the left and right vertical skeleton materials 205 also work to shield, and there is no gap for magnetic flux to enter.
本実施形態では、製鉄所のリフティングマグネット４０１からの漏れ磁束が電磁式車速センサ１０６を通らないよう磁気遮蔽板２が設けられたが、車載用のリフティングマグネットによって電磁式車速センサ１０６の故障が生じるようなことがあった場合でも、本発明を適用することができる。 In the present embodiment, the magnetic shielding plate 2 is provided so that the leakage magnetic flux from the lifting magnet 401 of the ironworks does not pass through the electromagnetic vehicle speed sensor 106. However, the vehicle-mounted lifting magnet causes a failure of the electromagnetic vehicle speed sensor 106. Even in such a case, the present invention can be applied.
本実施形態では、縦骨格材２０５にアングル材２Ａが取り付けられ、アングル材２Ａの上に平板材２Ｐが載せられることにより、上遮蔽板２Ｔが構成されたが、アングル材２Ａは、変速機１０１及び電磁式車速センサ１０６の上に平板材２Ｐとのクリアランスを得るためのものであり、縦骨格材２０５の上辺が十分に高く縦骨格材２０５に平板材２Ｐが直接載せられてもクリアランスが得られるのであれば、アングル材２Ａは不要である。 In the present embodiment, the angle member 2A is attached to the vertical skeleton member 205, and the upper shielding plate 2T is configured by placing the flat plate member 2P on the angle member 2A. In addition, a clearance with the flat plate member 2P is obtained on the electromagnetic vehicle speed sensor 106, and even when the flat plate member 2P is directly placed on the vertical frame member 205, the clearance is obtained. If so, the angle member 2A is not necessary.
本実施形態では、固定の荷台を有する牽引なし貨物搬送車両１を対象としたが、チルトする荷台を有するダンプ式の貨物搬送車両であっても、あるいはトレーラ式の貨物搬送車両３０１であっても、荷台の上から電磁式車速センサ１０６に向かう漏れ磁束が原因で電磁式車速センサ１０６に故障が発生するのであれば、前述したような実験に基づき磁束の通り道に電磁式車速センサ１０６を磁気遮蔽する磁気遮蔽板が設けられることで、電磁式車速センサ１０６の故障がなくなる。 In the present embodiment, the towless freight transport vehicle 1 having a fixed loading platform is the target, but even a dump-type cargo transport vehicle having a tilting loading platform or a trailer-type cargo transport vehicle 301 may be used. If a failure occurs in the electromagnetic vehicle speed sensor 106 due to the leakage magnetic flux from the loading platform to the electromagnetic vehicle speed sensor 106, the electromagnetic vehicle speed sensor 106 is magnetically shielded along the path of the magnetic flux based on the above-described experiment. By providing the magnetic shielding plate, the electromagnetic vehicle speed sensor 106 is not broken.
本実施形態では、電磁式車速センサ１０６が出力軸１０４の回転を検出するよう電磁式車速センサ１０６が変速機１０１の後端部に取り付けられたが、変速機１０１の主軸あるいは対抗軸の回転を検出するように変速機１０１の前端部や中央部に電磁式車速センサ１０６が取り付けられる場合であっても、荷台２０４の上から電磁式車速センサ１０６に向かう漏れ磁束が原因で電磁式車速センサ１０６に故障が発生するのであれば、前述したような実験に基づき磁束の通り道に電磁式車速センサ１０６を磁気遮蔽する磁気遮蔽板が設けられることで、電磁式車速センサ１０６の故障がなくなる。 In this embodiment, the electromagnetic vehicle speed sensor 106 is attached to the rear end portion of the transmission 101 so that the electromagnetic vehicle speed sensor 106 detects the rotation of the output shaft 104. However, the rotation of the main shaft or the counter shaft of the transmission 101 is detected. Even when the electromagnetic vehicle speed sensor 106 is attached to the front end portion or the center portion of the transmission 101 so as to detect, the electromagnetic vehicle speed sensor 106 is caused by the leakage magnetic flux from the top of the loading platform 204 toward the electromagnetic vehicle speed sensor 106. If a failure occurs, a magnetic shielding plate that magnetically shields the electromagnetic vehicle speed sensor 106 is provided along the path of the magnetic flux based on the above-described experiment, thereby eliminating the failure of the electromagnetic vehicle speed sensor 106.
１ 貨物搬送車両
２ 磁気遮蔽板
２Ａ アングル材
２Ｂ 下遮蔽板
２Ｐ 平板材
２Ｔ 上遮蔽板
１０１ 変速機
１０４ 出力軸
１０６ 電磁式車速センサ
２０４ 荷台
２０５ 縦骨格材
２０５Ｌ 左側縦骨格材
２０５Ｒ 右側縦骨格材
DESCRIPTION OF SYMBOLS 1 Cargo conveyance vehicle 2 Magnetic shielding plate 2A Angle material 2B Lower shielding plate 2P Flat plate material 2T Upper shielding plate 101 Transmission 104 Output shaft 106 Electromagnetic vehicle speed sensor 204 Loading platform 205 Vertical frame material 205L Left vertical frame material 205R Right vertical frame material
Claims (4)
前記荷台の下に前記電磁式車速センサを磁気遮蔽する磁気遮蔽板が設けられたことを特徴とする貨物搬送車両。 In a freight transport vehicle in which a transmission is disposed under a loading platform, and an electromagnetic vehicle speed sensor that detects rotation of an output shaft is attached to the transmission.
A cargo transportation vehicle, wherein a magnetic shielding plate for magnetically shielding the electromagnetic vehicle speed sensor is provided under the loading platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011046391A JP2012184944A (en) | 2011-03-03 | 2011-03-03 | Cargo transportation vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011046391A JP2012184944A (en) | 2011-03-03 | 2011-03-03 | Cargo transportation vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2012184944A true JP2012184944A (en) | 2012-09-27 |
Family
ID=47015178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2011046391A Pending JP2012184944A (en) | 2011-03-03 | 2011-03-03 | Cargo transportation vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2012184944A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6342683U (en) * | 1986-09-05 | 1988-03-22 | ||
| JPH0727571A (en) * | 1993-05-10 | 1995-01-27 | Nippondenso Co Ltd | Magnetism detecting device |
| JPH09188149A (en) * | 1996-01-12 | 1997-07-22 | Hino Motors Ltd | Supporting structure of vehicle transmission |
| JP2002327832A (en) * | 2001-05-08 | 2002-11-15 | Jatco Ltd | Speed sensor attaching structure for automatic transmission |
-
2011
- 2011-03-03 JP JP2011046391A patent/JP2012184944A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6342683U (en) * | 1986-09-05 | 1988-03-22 | ||
| JPH0727571A (en) * | 1993-05-10 | 1995-01-27 | Nippondenso Co Ltd | Magnetism detecting device |
| JPH09188149A (en) * | 1996-01-12 | 1997-07-22 | Hino Motors Ltd | Supporting structure of vehicle transmission |
| JP2002327832A (en) * | 2001-05-08 | 2002-11-15 | Jatco Ltd | Speed sensor attaching structure for automatic transmission |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5699260B2 (en) | Large transport vehicles, especially self-driving large transport vehicles for ISO containers | |
| CN103707751B (en) | For the skeleton construction used in electric vehicle | |
| JP5587968B2 (en) | DC relay | |
| JP5822896B2 (en) | Car subframe | |
| US8662239B2 (en) | Series-hybrid vehicle | |
| KR20190124368A (en) | Battery case for vehicle | |
| US20140346815A1 (en) | Magnetic Field Shield for Electromagnetic Fields and Vehicle Having an Integrated Magnetic Field Shield | |
| JP2008062736A (en) | Four-wheel travel vehicle for irregular ground | |
| US8960357B2 (en) | Motor vehicle with an electric drive unit | |
| US20170210314A1 (en) | Vehicle | |
| JP2012184944A (en) | Cargo transportation vehicle | |
| CN108254433B (en) | Magnetic leakage detector for storage tank bottom plate | |
| CN204978358U (en) | Motor -driven carriage loads, uninstallation device | |
| KR102151500B1 (en) | Vehicle-mounted structure of non-contact power receiving device | |
| JP6610876B2 (en) | Vehicle equipped with transpiration fuel processing equipment | |
| JP6047087B2 (en) | Vehicle vibration noise reduction device | |
| JP2012081904A (en) | Vehicle floor structure | |
| ES2113260A1 (en) | Friction clutch, in particular for motor vehicles | |
| CN207989680U (en) | A kind of new-energy automobile drive axle differential mechanism shell convenient for handling | |
| CN106080800B (en) | Fender configuration and vehicle with it | |
| GB2514910A (en) | Tandem axle for a utility vehicle | |
| CN102951208A (en) | High-strength engine hood of truck | |
| CN106740417A (en) | The control method and system of capacity of the tipping body tarpaulin mechanism | |
| CN203698455U (en) | Electric tray loading vehicle | |
| JP2005159025A (en) | Compound magnet and eddy current type reduction gear employing it |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20140204 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20140904 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20140916 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20150203 |