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JP2018132391A - Vehicle weight measurement device - Google Patents

Vehicle weight measurement device Download PDF

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JP2018132391A
JP2018132391A JP2017025543A JP2017025543A JP2018132391A JP 2018132391 A JP2018132391 A JP 2018132391A JP 2017025543 A JP2017025543 A JP 2017025543A JP 2017025543 A JP2017025543 A JP 2017025543A JP 2018132391 A JP2018132391 A JP 2018132391A
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oil chamber
diameter
hydraulic pressure
side end
pressure
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JP6784189B2 (en
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史明 早田
Fumiaki Hayata
史明 早田
弘志 河原
Hiroshi Kawahara
弘志 河原
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NSK Ltd
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Abstract

【課題】圧縮方向の荷重を検出する重量測定装置を提供し、車両の過積載を防止し、油室内の圧力を一定となるように管理された重量測定装置を提供する。【解決手段】上面7aを車両側に固定し、下面7b側に環状の溝部9cを設けた取付部7と、溝部の開口領域を覆い、溝部とともに油室9を形成する環状のダイアフラム11と、ピストン43の移動により変化可能な油室内の測定流体Rの圧力変化を検出し得る圧力センサ21と、油室内の圧力を調整する油圧調整機構16とを含み、油圧調整機構は、取付部7の油室側と大気側とを連通し、油室側端17aから大気側端17bに向けて徐々に縮径してなるテーパ状に形成された油圧調整孔部17と、油圧調整孔部を螺合しつつ移動可能で、油室側端18aが大径で大気側端18bに向けて徐々に縮径してなるテーパネジ18とからなる。【選択図】図3A weight measuring device that detects a load in a compression direction, prevents overloading of a vehicle, and manages the pressure in an oil chamber to be constant. A mounting portion (7) having an upper surface (7a) fixed to a vehicle side and an annular groove (9c) provided on a lower surface (7b) side; an annular diaphragm (11) covering an opening region of the groove and forming an oil chamber (9) together with the groove; It includes a pressure sensor 21 capable of detecting changes in the pressure of the fluid R to be measured in the oil chamber, which can be changed by movement of the piston 43, and a hydraulic pressure adjustment mechanism 16 for adjusting the pressure in the oil chamber. The oil chamber side and the atmosphere side are communicated with each other, and the hydraulic pressure adjustment hole portion 17 is formed in a tapered shape gradually decreasing in diameter from the oil chamber side end 17a toward the atmosphere side end 17b, and the hydraulic pressure adjustment hole portion is screwed. It is composed of a tapered screw 18 which can be moved while being fitted, has a large diameter at an end 18a on the oil chamber side, and gradually decreases in diameter toward an end 18b on the atmosphere side. [Selection drawing] Fig. 3

Description

本発明は、車両の重量を測定する装置、特に自動車の懸架装置に組込み過積載を検出する車両の重量測定装置に関するものである。   The present invention relates to an apparatus for measuring the weight of a vehicle, and more particularly to an apparatus for measuring the weight of a vehicle that is incorporated in a suspension system of an automobile and detects overloading.

自動車、特に、種々の荷物などを運搬するトラックやバンなどの商用車において、法定積載量を超えて道路を通行する不法な過積載が社会問題となっている。これは、一度にたくさんの荷物を運搬したほうが運送費を少なくできるからである。   In vehicles, especially commercial vehicles such as trucks and vans that carry various kinds of luggage, illegal overloading that passes the road beyond legal load capacity has become a social problem. This is because the transportation cost can be reduced by transporting many packages at once.

しかし、このような過積載は次のような種々の問題を招く虞を有しており、避けなければならないものである。
(1)過積載により自動車の運動性能が低下したり、構成部品が破損したりする虞があるため、事故の原因となることがある。例えば、車軸(ハブ)の破損、タイヤの破損(バースト)、制動距離が長くなりブレーキが過熱して効きにくくなる、車両が横転し易くなるなど、事故等を招く要因を多数有している。
(2)過積載により道路の損傷が激しくなるため、道路のメンテナンス費用が掛かる。
However, such overloading may cause various problems as described below and should be avoided.
(1) The motor performance of the automobile may be reduced or the components may be damaged due to overloading, which may cause an accident. For example, there are many factors that cause accidents such as breakage of an axle (hub), breakage of a tire (burst), a braking distance becomes long and the brake is overheated and hardly works, and the vehicle easily rolls over.
(2) Road maintenance costs will be incurred due to severe road damage caused by overloading.

このような過積載の防止が困難となっている原因は多々あるが、その内の一つには、積載重量が運転手あるいは同乗者などから容易に認識できないということにある。
すなわち、従来、車両の荷重測定(積載重量測定)は、台秤に測定対象の車両を載せて行っていた。
しかし、台秤の設置は、施設が大がかりで広い設置スペースを必要とするため、及び設置コストが嵩むため、設置できる台秤の台数が制限され多くの車両を測定することなど物理的にも無理があった。
There are many reasons why it is difficult to prevent such overloading, but one of them is that the load weight cannot be easily recognized by the driver or passengers.
That is, conventionally, vehicle load measurement (load weight measurement) has been performed by placing a vehicle to be measured on a platform scale.
However, the installation of the platform scale is physically unreasonable because the facility is large and requires a large installation space, and the installation cost increases, so the number of platforms that can be installed is limited and many vehicles are measured. It was.

そこで、昨今では、特許文献1などに開示されているように、車両自体に搭載して荷重を測定することを可能とした簡易的な荷重測定装置が多々提案されている。   Therefore, recently, as disclosed in Patent Document 1 and the like, many simple load measuring devices that can be mounted on a vehicle and measure a load have been proposed.

例えば、特許文献1に開示の先行技術は、車両の荷重が掛かることで伸縮する被荷重部材の異なる取付箇所に2つの溶着部分が溶着されるベースアッシーと、該ベースアッシーにより支持され、前記車両に掛かる荷重の変化により前記2つの溶着部分が接近離間する方向に前記ベースアッシーが伸縮することで出力が変化する圧縮歪検出用センサ素子と、該圧縮歪検出用センサ素子の出力を増幅するアンプが実装された回路基板とで構成し、圧縮歪を検出することにより荷重測定する簡易的な荷重測定装置である。   For example, in the prior art disclosed in Patent Document 1, a base assembly in which two welded portions are welded to different mounting positions of a member to be loaded that expands and contracts when a vehicle load is applied, and the vehicle is supported by the base assembly, A compression strain detection sensor element whose output changes as the base assembly expands and contracts in a direction in which the two welded portions approach and separate due to a change in load applied to the amplifier, and an amplifier that amplifies the output of the compression strain detection sensor element Is a simple load measuring device that measures a load by detecting compressive strain.

しかし、従来のこの種の荷重測定装置にあっては、特許文献1のように構成が複雑でかつ回路基板やアンプなどを備える必要があるためコスト高を招いていた。また、これら荷重測定装置が衝撃を受け易い箇所に備えられるため、回路基板やアンプなどに支障を来す虞もあった。   However, the conventional load measuring device of this type is complicated in configuration as in Patent Document 1, and requires a circuit board, an amplifier, and the like, resulting in high costs. In addition, since these load measuring devices are provided in places where they are easily subjected to impact, there is a possibility that the circuit board, the amplifier and the like may be hindered.

そこで本願の発明者等は、懸架装置における車体との取付部近傍に組み込まれている軸受装置に着目し、懸架装置に掛かる圧縮方向荷重を計測し得る簡易かつ安価で耐久性に優れた車両の重量測定装置を提供することで上記問題点を解消することに成功し、先に出願をしている(例えば、特願2015−241305号)。具体的には、重量測定装置を懸架装置に一体に備える構成であって、懸架装置のコイルスプリングによって、ピストンがインナーカラーの外径に摺接しつつ軸方向に案内され、ダイアフラムを押圧することによって油室内に充填されている測定流体に圧力を掛け、その圧力変化を圧力センサで検出する構成である。   Therefore, the inventors of the present application pay attention to a bearing device incorporated in the vicinity of the attachment portion of the suspension device with the vehicle body, and can measure a load in the compression direction applied to the suspension device, which is simple, inexpensive, and excellent in durability. By providing a weight measuring device, the above-mentioned problems have been successfully solved, and a prior application has been filed (for example, Japanese Patent Application No. 2015-241305). Specifically, the weight measuring device is integrated with the suspension device, and the piston is guided in the axial direction while being in sliding contact with the outer diameter of the inner collar by the coil spring of the suspension device, thereby pressing the diaphragm. In this configuration, pressure is applied to the measurement fluid filled in the oil chamber, and the pressure change is detected by a pressure sensor.

特開2001−330503JP 2001-330503 A

このような荷重測定装置は、通常、大きく分けて2つの機能ブロックから構成されている。
1つ目の機能ブロックは、測定流体(作動油)を充填した油圧室(油室)と、油室の一部を押圧変形可能に構成するダイアフラムと、油室と連通して備えられ、ダイアフラムの押圧による油室の圧力変化を検出する圧力センサからなり、車両に固定される荷重検出部である。
2つ目の機能ブロックは、スプリングの弾発力などにより、荷重に従って移動して前記ダイアフラムを押圧するピストン部である。
Such a load measuring device is generally composed of two functional blocks.
The first functional block includes a hydraulic chamber (oil chamber) filled with a measurement fluid (hydraulic oil), a diaphragm configured to be able to press and deform a part of the oil chamber, and an oil chamber in communication with the diaphragm. It is a load detection part which consists of a pressure sensor which detects the pressure change of the oil chamber by pressing of, and is fixed to a vehicle.
The second functional block is a piston portion that moves according to the load and presses the diaphragm by the elastic force of the spring.

また、この荷重検出部のダイアフラムや圧力センサは、車両前輪用の懸架装置に組み込まれる場合には、トッププレート(取付部)に取り付けられ、車両後輪用の懸架装置に組み込まれる場合にはボトムプレート(取付部)に取り付けられる。この場合、圧力センサを取付部の連結部に取り付ける構造(取り付け構造)としては、測定流体の漏れを封止でき、また圧力センサそのものを固定できるようにするため、テーパネジなどのネジとOリングによる密封構造が用いられる。   Further, the diaphragm and pressure sensor of the load detection unit are attached to the top plate (attachment unit) when incorporated in the suspension device for the front wheel of the vehicle, and are attached to the suspension device for the rear wheel of the vehicle. It is attached to the plate (attachment part). In this case, as a structure (attachment structure) for attaching the pressure sensor to the connecting part of the attachment part, it is possible to seal the leakage of the measurement fluid and to fix the pressure sensor itself by using a screw such as a taper screw and an O-ring. A sealing structure is used.

そして、荷重測定装置を組み立てる場合には、油室内の測定流体(作動油)も同時に密封される。
具体的には、油室に空気が混入することを避けるため、油室周辺の部品全てを測定流体(作動油)を満たした油槽に沈め、その油槽中で荷重測定装置の組み立てを行う。この組み立て作業の際、測定流体(作動油)を油室内に封入する形で密封されてしまうため、組み立て後には荷重測定装置内の油圧を調整することができなかった。
When the load measuring device is assembled, the measurement fluid (hydraulic oil) in the oil chamber is also sealed at the same time.
Specifically, in order to avoid air from being mixed into the oil chamber, all the components around the oil chamber are submerged in an oil tank filled with the measurement fluid (hydraulic oil), and the load measuring device is assembled in the oil tank. At the time of this assembling operation, the measurement fluid (hydraulic oil) is sealed in such a manner as to be enclosed in the oil chamber, so that the hydraulic pressure in the load measuring device cannot be adjusted after assembling.

また、圧力センサの取り付け構造に用いられるOリング(密封構造)は、圧力センサと取付部の連結部との間で押しつぶされて、その弾性変形によって密着し油室が密封されているため、Oリングの弾性変形による油室の容積減少が生じる。一般に測定流体は圧縮性がないか、非常に小さいため、ネジ込みによる進み量が非常に小さくても、油室内の圧力に大きな影響を与える。このため、荷重測定装置を組み立てたときに、センサの基準値となる無負荷時の油室の圧力(油圧)が大気圧よりも高い状態で封入されてしまうが、前述したように油圧を調整することができなかった。
また、圧力センサの取り付け作業毎にOリングの変形状態が異なり、油室の圧力(油圧)にもばらつきが生じるため、個別に圧力の検定作業をする必要があった。
In addition, the O-ring (sealing structure) used for the pressure sensor mounting structure is crushed between the pressure sensor and the connecting portion of the mounting portion, and is closely adhered by its elastic deformation, so that the oil chamber is sealed. The volume of the oil chamber is reduced due to elastic deformation of the ring. In general, since the measurement fluid is not compressible or very small, even if the advance amount by screwing is very small, the pressure in the oil chamber is greatly affected. For this reason, when the load measuring device is assembled, the oil chamber pressure (hydraulic pressure) at the time of no load, which is the reference value of the sensor, is sealed in a state higher than atmospheric pressure, but the oil pressure is adjusted as described above. I couldn't.
In addition, the deformation state of the O-ring is different every time the pressure sensor is attached, and the pressure (hydraulic pressure) in the oil chamber also varies. Therefore, it is necessary to perform the pressure verification work individually.

本発明は従来技術の有するこのような問題点を解決するためになされたものであり、その課題とするところは、油室内の圧力を一定となるように管理された重量測定装置を提供することにある。   The present invention has been made to solve such problems of the prior art, and the object of the present invention is to provide a weight measuring device managed so that the pressure in the oil chamber is kept constant. It is in.

この目的を達成するために、本発明は、懸架装置に備えられ、上面側を車両側に固定してなる取付部と、前記懸架装置のスプリングの弾発力により移動可能なピストンと、前記ピストンにより押圧されて変形可能なダイアフラムと、前記取付部の下面側と前記ダイアフラムとの間で形成されるとともに、測定流体を充填してなる所定空間の油室と、前記取付部に備えられ、前記ピストンの移動により変化可能な油室内の測定流体の圧力変化を検出し得る圧力センサと、油室内の圧力を調整する油圧調整機構とを含み、前記油圧調整機構は、油室側と大気側とを連通し、油室側端から大気側端に向けて徐々に縮径してなるテーパ状に形成された、少なくとも1つの油圧調整孔部と、前記油圧調整孔部を螺合しつつ移動可能で、油室側端が大径で大気側端に向けて徐々に縮径してなるテーパネジと、を備えることを特徴とする車両の重量測定装置としたことである。
その場合、前記テーパネジの小径側には、油圧調整孔部と螺合したテーパネジを回転させる工具が嵌合する嵌合部を備えていることもある。
In order to achieve this object, the present invention is provided with a suspension device, a mounting portion whose upper surface side is fixed to the vehicle side, a piston movable by the spring force of the suspension device, and the piston A diaphragm that is deformed by being pressed by, a lower surface side of the mounting portion and the diaphragm, and an oil chamber in a predetermined space filled with a measurement fluid, and the mounting portion, A pressure sensor capable of detecting a change in pressure of the measurement fluid in the oil chamber that can be changed by movement of the piston, and a hydraulic pressure adjustment mechanism that adjusts the pressure in the oil chamber, the hydraulic pressure adjustment mechanism comprising: Can be moved while screwing together the at least one hydraulic pressure adjustment hole portion, which is formed in a tapered shape with a diameter gradually reduced from the oil chamber side end toward the atmosphere side end. And the oil chamber side end has a large diameter Resides in that the weight measurement device for a vehicle, characterized in that it comprises a tapered thread made gradually reduced in diameter toward the air side end, the.
In that case, a fitting portion into which a tool for rotating the taper screw screwed with the hydraulic pressure adjusting hole portion is fitted may be provided on the small diameter side of the taper screw.

本発明によれば、油室内の圧力を一定となるように管理された重量測定装置を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the weight measuring apparatus managed so that the pressure in an oil chamber might become constant can be provided.

本発明車両の重量測定装置の第一実施形態で、懸架装置に組み込んだ状態を示す縦断側面図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional side view showing a state of being incorporated in a suspension device in a first embodiment of a vehicle weight measuring device of the present invention. 図1の第一実施形態を分解して示す概略斜視図である。It is a schematic perspective view which decomposes | disassembles and shows 1st embodiment of FIG. 本実施形態における車両の重量測定装置の一実施形態を示す縦断面図である。It is a longitudinal section showing one embodiment of the weight measuring device of vehicles in this embodiment. 図3に示す車両の重量測定装置の要部を示す部分拡大断面図である。It is a partial expanded sectional view which shows the principal part of the weight measuring apparatus of the vehicle shown in FIG.

以下、本発明の車両の重量測定装置の一実施形態について、添付図面を参照して説明する。
本実施形態では、本発明の車両の重量測定装置を自動車の懸架装置(サスペンション)1に用いた実施の一形態を示す。なお、本実施形態は、本発明の一実施形態であって、何等これに限定解釈されるものではなく本発明の範囲内で設計変更可能である。
Hereinafter, an embodiment of a vehicle weight measuring device of the present invention will be described with reference to the accompanying drawings.
In the present embodiment, an embodiment in which the vehicle weight measuring device of the present invention is used in an automobile suspension device (suspension) 1 will be described. The present embodiment is an embodiment of the present invention, and is not construed as being limited thereto. The design can be changed within the scope of the present invention.

図示は省略するが、例えば、懸架装置(サスペンション)1の上側は、取付部(トッププレート)7を介して自動車の本体フレーム(クロスメンバ)に固定され、下側はフレームに枢着されたロア・アームを介してアクスル(車軸)に固定される。
なお、図1に示す懸架装置1は、本発明の車両の重量測定装置を組み込んだ以外は周知の構成であって、特に本実施形態に限定解釈されるものではなく本発明の範囲内で設計変更可能である。
図1中、符号3はショックアブソーバ、符号5はコイルスプリングを示す。以下、本発明の特徴的部分である車両の重量測定装置について説明し、それ以外の懸架装置の構成についての説明は省略する。
Although not shown, for example, the upper side of the suspension device (suspension) 1 is fixed to a body frame (cross member) of an automobile via a mounting portion (top plate) 7, and the lower side is pivotally attached to the frame. -It is fixed to the axle (axle) via the arm.
The suspension device 1 shown in FIG. 1 has a known configuration except that the vehicle weight measuring device of the present invention is incorporated, and is not particularly limited to the present embodiment, and is designed within the scope of the present invention. It can be changed.
In FIG. 1, reference numeral 3 denotes a shock absorber, and reference numeral 5 denotes a coil spring. Hereinafter, the vehicle weight measuring device which is a characteristic part of the present invention will be described, and description of the configuration of the other suspension devices will be omitted.

車両の重量測定装置は、車両側に固定される取付部(トッププレート)7と、取付部7の下面7bに備えられるインナーカラー33及びアウターカラー35と前記取付部7とによって挟まれて固定されるダイアフラム11と、ダイアフラム11と当接し、ダイアフラム11を鉛直方向(図中矢印100で示す方向)に押圧可能なピストン43と、懸架装置1のコイルスプリング5の一端(上端)を受けるブッシュ47と、ピストン43とブッシュ47との間に介在される軸受装置57と、取付部7とダイアフラム11との間で形成され、所定の測定流体(作動油)Rを充填してなる油室9と、取付部7の上面7aに備えられ、油室9内に充填されている測定流体Rの圧力変化を検出し得る圧力センサ21と、油圧調整機構16とで構成されている(図1乃至図4参照。)   The vehicle weight measuring device is sandwiched and fixed by an attachment portion (top plate) 7 fixed to the vehicle side, an inner collar 33 and an outer collar 35 provided on the lower surface 7b of the attachment portion 7, and the attachment portion 7. A diaphragm 11 that abuts against the diaphragm 11 and can press the diaphragm 11 in the vertical direction (the direction indicated by the arrow 100 in the figure), and a bush 47 that receives one end (upper end) of the coil spring 5 of the suspension device 1. A bearing device 57 interposed between the piston 43 and the bush 47, an oil chamber 9 formed between the mounting portion 7 and the diaphragm 11 and filled with a predetermined measurement fluid (hydraulic oil) R; A pressure sensor 21 provided on the upper surface 7a of the mounting portion 7 and capable of detecting a pressure change of the measurement fluid R filled in the oil chamber 9 and a hydraulic pressure adjustment mechanism 16 are configured. That (see FIGS. 1 to 4.)

取付部(トッププレート)7は、所定の肉厚を有する短尺円筒状に形成され、上面7a側を車両側に固定するとともに、環状に開口する溝部9cを下面7b側に設けてなり、外周端から鉛直方向で下方に向けて薄肉の円筒状に環状壁部7cを突出している。   The mounting portion (top plate) 7 is formed in a short cylindrical shape having a predetermined thickness, and the upper surface 7a side is fixed to the vehicle side, and an annularly opened groove portion 9c is provided on the lower surface 7b side. The annular wall portion 7c protrudes in a thin cylindrical shape from the top toward the bottom in the vertical direction.

また、取付部7には、自動車の本体フレーム(例えばクロスメンバ)に締結固定するため、ボルト15を挿通する複数個のボルト挿通孔7gを設けるとともに、後述するストッパを固定するための連結ボルト20を締結する複数個のボルト固定孔7hを備えている。
また、取付部7の下面7bの中心領域には、インナーカラー33の円筒状突部33bを嵌合する嵌合孔部7iを凹設している。
Further, the mounting portion 7 is provided with a plurality of bolt insertion holes 7g through which the bolts 15 are inserted in order to be fastened and fixed to a body frame (for example, a cross member) of the automobile, and a connecting bolt 20 for fixing a stopper, which will be described later. Are provided with a plurality of bolt fixing holes 7h.
A fitting hole 7 i for fitting the cylindrical projection 33 b of the inner collar 33 is recessed in the center region of the lower surface 7 b of the mounting portion 7.

溝部9cは、取付部7の下面7bにて環状に凹設されているダイアフラム収容凹部13内にて取付部7の上面7a方向に向けて断面視ドーム状に形成されている。
ダイアフラム収容凹部13は、溝部9cの内径側に所定幅で環状に構成された内側の面部13aと、溝部9cの外径側に所定幅環状に構成された外側の面部13bとを備えている。
The groove portion 9c is formed in a dome shape in cross section in the direction of the upper surface 7a of the mounting portion 7 in the diaphragm housing recess 13 that is annularly formed in the lower surface 7b of the mounting portion 7.
The diaphragm housing recess 13 includes an inner surface portion 13a configured in a ring shape with a predetermined width on the inner diameter side of the groove portion 9c, and an outer surface portion 13b configured in a ring shape with a predetermined width on the outer diameter side of the groove portion 9c.

前記取付部7における車体側に面した上面7aには、圧力センサ21を連結可能なセンサ連結部7dが形成されている。
また、取付部7には、溝部9cと一箇所又は複数個所で連通する連通路9aがセンサ連結部7dに向けて内設されている。
A sensor connecting portion 7d capable of connecting the pressure sensor 21 is formed on the upper surface 7a of the mounting portion 7 facing the vehicle body.
In addition, the attachment portion 7 is internally provided with a communication passage 9a that communicates with the groove portion 9c at one or a plurality of locations toward the sensor connecting portion 7d.

前記センサ連結部7dは、圧力センサ21の先端に設けた円筒状の検出部21aを受ける円筒状の挿入部7fが、上面から内部に向けて凹設され、挿入口7eが鉛直方向で上方に向けて円筒状に突出するとともに開口している。また、挿入部7fの底面領域には、前記連通路9aと連通する流体溜まり9bが形成されている。
なお、センサ連結部7dと圧力センサ21との接続は、測定流体Rが漏れないよう接続することが必要である。
In the sensor connecting portion 7d, a cylindrical insertion portion 7f for receiving a cylindrical detection portion 21a provided at the tip of the pressure sensor 21 is recessed from the upper surface to the inside, and the insertion port 7e is upward in the vertical direction. It protrudes in a cylindrical shape and opens. A fluid reservoir 9b communicating with the communication passage 9a is formed in the bottom area of the insertion portion 7f.
The connection between the sensor connecting portion 7d and the pressure sensor 21 needs to be connected so that the measurement fluid R does not leak.

圧力センサ21は、油室9内に充填されている測定流体Rの圧力変化を検出し得るものであって、例えば、圧力を測定し、これを電圧信号に変換して伝送される周知構造のものが適宜本発明の範囲内において選択使用されるものであり、特に限定解釈はされず、本発明の範囲内で最適なものが適宜選択可能である。
本実施形態では、センサ連結部7dに検出部21aを挿入するとともに、先端検出面21bを油室9内に臨ませ、突き当てフランジ面部21cをセンサ連結部7dの開口縁部に密着させて鉛直方向に立設されている。
The pressure sensor 21 can detect a change in the pressure of the measurement fluid R filled in the oil chamber 9. For example, the pressure sensor 21 measures a pressure, converts the pressure into a voltage signal, and transmits the voltage signal. Those are appropriately selected and used within the scope of the present invention, and are not particularly limited and can be appropriately selected within the scope of the present invention.
In the present embodiment, the detection portion 21a is inserted into the sensor connecting portion 7d, the tip detection surface 21b faces the oil chamber 9, and the abutting flange surface portion 21c is brought into close contact with the opening edge portion of the sensor connecting portion 7d. Standing in the direction.

本実施形態では、突き当てフランジ面部21cと開口縁部との間にワッシャ23を介して固定している。また、側定流体の漏洩防止を図るため、所定の密封装置、本実施形態ではOリング25を配設している。
なお、圧力センサ21は、必ずしも取付部7の上面7aの中心に配設することはなく、センサ連結部7dを取付部7の上面7aの任意位置に設けて配設することが可能で、車体側の取り付けにおいて支障のない位置を採択して配設することが可能である。
In this embodiment, it fixes via the washer 23 between the abutting flange surface part 21c and the opening edge part. In order to prevent leakage of the side constant fluid, a predetermined sealing device, in this embodiment, an O-ring 25 is provided.
Note that the pressure sensor 21 is not necessarily disposed at the center of the upper surface 7a of the mounting portion 7, and the sensor connecting portion 7d can be disposed at an arbitrary position on the upper surface 7a of the mounting portion 7. It is possible to select and arrange a position that does not hinder the side mounting.

ダイアフラム11は、前記溝部9cの開口領域9dを覆い、前記溝部9cとともに所定空間の油室9を形成する環状に形成されており、取付部7の下面7bにて環状に形成されているダイアフラム収容凹部13に嵌着されている。   The diaphragm 11 is formed in an annular shape that covers the opening region 9d of the groove portion 9c and forms the oil chamber 9 in a predetermined space together with the groove portion 9c, and is formed in an annular shape on the lower surface 7b of the attachment portion 7. It is fitted in the recess 13.

ダイアフラム11は、例えば、本実施形態では、内径側と外径側にそれぞれ肉厚の第一密封領域27と第二密封領域29をそれぞれ環状に形成するとともに、第一密封領域27と第二密封領域29の間で薄肉状に連結されて変形可能に構成された環状の押圧領域31を備えて構成されている。
押圧領域31は、前記溝部9cの開口領域9dを覆う程度の幅をもって構成され、この押圧領域31と取付部7の溝部9c(連通路9a及び流体溜まり9bを含む)とによって所定領域の油室9が形成される。
第一密封領域27と第二密封領域29は、ダイアフラム収容凹部13の鉛直方向深さよりも肉厚に形成されており、インナーカラー33及びアウターカラー35によって挟み込まれたときに圧縮されて密封可能な厚さとする。
In the present embodiment, for example, in the present embodiment, the diaphragm 11 has a thick first sealing region 27 and a second sealing region 29 formed on the inner diameter side and the outer diameter side, respectively. It is configured to include an annular pressing region 31 that is thinly connected between the regions 29 and configured to be deformable.
The pressing area 31 is configured to have a width that covers the opening area 9d of the groove 9c, and the pressing chamber 31 and the groove 9c (including the communication passage 9a and the fluid reservoir 9b) of the mounting portion 7 define an oil chamber in a predetermined area. 9 is formed.
The first sealing region 27 and the second sealing region 29 are formed to be thicker than the depth in the vertical direction of the diaphragm housing recess 13, and can be compressed and sealed when sandwiched between the inner collar 33 and the outer collar 35. Thickness.

ダイアフラム11の材質は、柔軟で耐久性(耐寒性・耐摩耗性・耐油性)がある素材であれば良く、特に限定解釈されるものではないが、例えば、ニトリルゴム・テフロン(登録商標)・クロロプレンゴム・ふっ素ゴム・エチレンプロピレンゴムなど、流体の特質に合った材料を選択する。
また、薄肉のステンレス製などからなる金属製のダイアフラムであってもよく本発明の範囲内である。
The material of the diaphragm 11 may be any material that is flexible and durable (cold resistance, wear resistance, oil resistance), and is not particularly limited. For example, nitrile rubber, Teflon (registered trademark), Select materials that match the characteristics of the fluid, such as chloroprene rubber, fluorine rubber, and ethylene propylene rubber.
Further, a metal diaphragm made of thin stainless steel or the like may be used and is within the scope of the present invention.

また、本実施形態では、油室内の圧力を調整する油圧調整機構16を備えている。
油圧調整機構16は、油室側と大気側とを連通する油圧調整孔部17と、油圧調整孔部17に螺合するテーパネジ18とからなる。
油圧調整孔部17は、取付部7の断面視ドーム状に形成された溝部9c(油室側)から取付部7の上面7a(大気側)に連通して形成され、油圧調整孔部17の油室側端17aが最も大径で、大気側端17bが最も小径となるように、油室側端17aから大気側端17bに向けて徐々に縮径してなるテーパ形状をしている。即ち、油圧調整孔部17の内周面は大気側端17bに向かって内径方向のテーパ角を有して形成されている。
また、油圧調整孔部17の内周面には、油室側端17aから大気側端17bに向けて所定長さ(孔部の長さ方向)の雌ネジ部17cが形成されている。
In the present embodiment, a hydraulic pressure adjustment mechanism 16 that adjusts the pressure in the oil chamber is provided.
The hydraulic pressure adjustment mechanism 16 includes a hydraulic pressure adjustment hole 17 that communicates between the oil chamber side and the atmosphere side, and a taper screw 18 that is screwed into the hydraulic pressure adjustment hole 17.
The hydraulic pressure adjusting hole 17 is formed so as to communicate with the upper surface 7 a (atmosphere side) of the mounting portion 7 from the groove portion 9 c (oil chamber side) formed in a dome shape in a sectional view of the mounting portion 7. The oil chamber side end 17a has a taper shape that is gradually reduced in diameter from the oil chamber side end 17a toward the atmosphere side end 17b so that the air side end 17b has the smallest diameter. That is, the inner peripheral surface of the hydraulic pressure adjusting hole 17 is formed with a taper angle in the inner diameter direction toward the atmosphere side end 17b.
A female screw portion 17c having a predetermined length (a length direction of the hole portion) is formed on the inner peripheral surface of the hydraulic pressure adjusting hole portion 17 from the oil chamber side end 17a toward the atmosphere side end 17b.

テーパネジ18は、所謂「止めネジ」と称される頭の無い円柱状のネジであって、その外周面は、全長にわたって雄ネジ部18cが形成されるとともに、油室側端18aから大気側端18bに向けて徐々に縮径してなるテーパ形状をしている。
テーパネジ18の外周面は大気側端18bに向かって内径方向に、前記油圧調整孔部17の内周面と同様のテーパ角を有し、テーパネジ18のネジ長さは、油圧調整孔部17の孔長よりも短い。例えば、本実施形態では、テーパネジ18のネジ長さは、油圧調整孔部17の孔長さの約1/2の長さとなっている。
The taper screw 18 is a cylindrical screw without a head called a so-called “set screw”. The outer peripheral surface of the taper screw 18 is formed with a male screw portion 18c over the entire length, and from the oil chamber side end 18a to the atmosphere side end. The taper is formed by gradually reducing the diameter toward 18b.
The outer peripheral surface of the taper screw 18 has the same taper angle as the inner peripheral surface of the hydraulic pressure adjustment hole 17 in the inner diameter direction toward the atmosphere side end 18b. Shorter than the hole length. For example, in this embodiment, the screw length of the taper screw 18 is about ½ of the hole length of the hydraulic pressure adjusting hole portion 17.

さらに、テーパネジ18の大気側端18b(ネジ小径側端)は、油圧調整孔部17の大気側端17b(孔部小径側端)よりも大径に形成されており、油圧調整孔部17の油室側端17a(孔部大径側端)から油圧調整孔部17内に挿し込まれることにより、テーパネジ18の雄ネジ部18cと油圧調整孔部17の雌ネジ部17cとが螺合し、テーパネジ18を締めこむことができる。そして、双方のテーパ周面が重なると、雄ネジ部18cと雌ネジ部17cとが緊密に噛みあい緊締される。
このとき、テーパネジ18の大気側端18bは、油圧調整孔部17の大気側端17bよりも十分に奥まった位置で緊締されており、取付部7の上面7aに突出することは無い。
なお、油圧調整孔部17にテーパネジ18を組み付ける段階では、テーパネジ18は比較的緩い締め付けトルクで締めこまれることにより設置されている。
Further, the atmospheric side end 18 b (screw small diameter side end) of the taper screw 18 is formed to have a larger diameter than the atmospheric side end 17 b (hole small diameter side end) of the hydraulic pressure adjustment hole 17. By inserting the oil chamber side end 17a (hole portion large diameter side end) into the hydraulic pressure adjustment hole portion 17, the male screw portion 18c of the taper screw 18 and the female screw portion 17c of the hydraulic pressure adjustment hole portion 17 are screwed together. The taper screw 18 can be tightened. When both the tapered peripheral surfaces overlap, the male screw portion 18c and the female screw portion 17c are closely meshed and tightened.
At this time, the atmosphere-side end 18 b of the taper screw 18 is tightened at a position sufficiently deeper than the atmosphere-side end 17 b of the hydraulic pressure adjusting hole 17, and does not protrude from the upper surface 7 a of the mounting portion 7.
In the stage where the taper screw 18 is assembled to the hydraulic pressure adjusting hole 17, the taper screw 18 is installed by being tightened with a relatively loose tightening torque.

また、テーパネジ18には、テーパネジ18が油圧調整孔部17の雌ネジ部17cと螺合した状態で、工具を差し込んで回転させるための嵌合部19を備えている。本実施形態では、嵌合部19は、テーパネジ18の大気側端18b(ネジ小径側端)の端面の中央に、六角形の凹部として形成される(所謂六角穴付き止めねじ)とともに、テーパネジ18の油室側端18a(ネジ大径側端)の端面の中央に、六角形の凹部として形成された油室側嵌合部19aが備えられている。   Further, the taper screw 18 includes a fitting portion 19 for inserting and rotating a tool in a state where the taper screw 18 is screwed with the female screw portion 17c of the hydraulic pressure adjusting hole portion 17. In the present embodiment, the fitting portion 19 is formed as a hexagonal recess (so-called hexagon socket set screw) in the center of the end surface of the air end 18b (screw small diameter end) of the taper screw 18, and the taper screw 18 An oil chamber side fitting portion 19a formed as a hexagonal recess is provided at the center of the end surface of the oil chamber side end 18a (screw large diameter side end).

本実施形態では、嵌合部19及び嵌合部19aを六角形の凹部として形成した場合を説明したが、嵌合部19及び嵌合部19aの形状については、これに限定解釈されるものではなく、テーパネジ18を回転させることが可能であれば、他の形状であっても良い。例えば、嵌合部19及び嵌合部19aに端面を横断するスリット(溝)部とした形状(所謂すりわり付き止めネジ)であっても良い。
また、本実施形態では、一例として大気側端18b(ネジ小径側端)の端面に嵌合部19を備え、さらに、油室側端18a(ネジ大径側端)の端面にも油室側嵌合部19aを備えた場合を説明したが、これに限定解釈されるものではなく、少なくともテーパネジ18の大気側端18b(ネジ小径側端)の嵌合部19が備えられていれば良い。
In this embodiment, although the case where the fitting part 19 and the fitting part 19a were formed as a hexagonal recessed part was demonstrated, it limitedly interprets about the shape of the fitting part 19 and the fitting part 19a. As long as the taper screw 18 can be rotated, other shapes may be used. For example, the fitting part 19 and the fitting part 19a may have a shape (a so-called slotted set screw) that is a slit (groove) part that crosses the end face.
Moreover, in this embodiment, the fitting part 19 is provided in the end surface of the atmosphere side end 18b (screw small diameter side end) as an example, and also the oil chamber side is provided in the end surface of the oil chamber side end 18a (screw large diameter side end). Although the case where the fitting part 19a was provided was demonstrated, it is not limitedly interpreted to this, and the fitting part 19 of the air | atmosphere side end 18b (screw small diameter side end) of the taper screw 18 should just be provided at least.

取付部7の上面7a側から油圧調整孔部17内に工具(図示しない)を挿し入れるとともに、油圧調整機構16のテーパネジ18の嵌合部19に工具を嵌め込み、比較的高い締め付けトルクにて締結方向に回転させた場合には、テーパネジ18は、油圧調整孔部17を締結方向に回転することにより、油圧調整孔部17の大気側端17bの方向に移動する。これにより、油室9の容積が拡大するため油室9内の圧力が低下する。また、テーパネジ18を弛緩方向に回転させると、油室側端17aの方向に移動して、油室9の容積が縮小するため油室9内の圧力が上昇する。   A tool (not shown) is inserted into the hydraulic adjustment hole 17 from the upper surface 7a side of the mounting portion 7, and the tool is inserted into the fitting portion 19 of the taper screw 18 of the hydraulic adjustment mechanism 16 and fastened with a relatively high tightening torque. When rotated in the direction, the taper screw 18 moves in the direction of the atmosphere side end 17b of the hydraulic pressure adjusting hole 17 by rotating the hydraulic pressure adjusting hole 17 in the fastening direction. Thereby, since the volume of the oil chamber 9 expands, the pressure in the oil chamber 9 falls. Further, when the taper screw 18 is rotated in the relaxation direction, the taper screw 18 moves toward the oil chamber side end 17a, and the volume of the oil chamber 9 is reduced, so that the pressure in the oil chamber 9 increases.

本実施形態では、重量測定装置の油室9内の圧力が一定となるように管理されている。
具体的には、圧力センサ21を取付部(トッププレート)7のセンサ連結部7dに取り付ける作業において、まず、重量測定装置に荷重が掛かっていないか、あるいは所定の荷重が掛かった状態にて、圧力センサ21の検出部21aがセンサ連結部7dに挿入されて鉛直方向にネジ込まれる。
このとき、突き当てフランジ面部21cとセンサ連結部7dの開口縁部との間に介在するワッシャ23及びOリング25が押し潰され、Oリングの弾性変形によって、突き当てフランジ面部21cをセンサ連結部7dの開口縁部との間が密封される。
In the present embodiment, the pressure in the oil chamber 9 of the weight measuring device is managed so as to be constant.
Specifically, in the operation of attaching the pressure sensor 21 to the sensor connecting portion 7d of the attachment portion (top plate) 7, first, in a state where no load is applied to the weight measuring device or a predetermined load is applied, The detecting part 21a of the pressure sensor 21 is inserted into the sensor connecting part 7d and screwed in the vertical direction.
At this time, the washer 23 and the O-ring 25 interposed between the abutting flange surface portion 21c and the opening edge portion of the sensor connecting portion 7d are crushed, and the abutting flange surface portion 21c is deformed by the elastic deformation of the O-ring. The space between the opening edge of 7d is sealed.

圧力センサ21が取り付けられると、油室9内に臨むまで進入したセンサの先端検出面21bによって油室9の容積が減少し、測定流体(作動油)Rが過剰となるため、油室9内の圧力が上昇する。また、ワッシャ23及びOリング25が押し潰される程度によって、圧力センサ21の先端検出面21bの油室9内への進入量も変わるため、組み立てられた重量測定装置毎に油室9内の圧力にばらつきが生じ、総じて高い圧力となっている。   When the pressure sensor 21 is attached, the volume of the oil chamber 9 is reduced by the tip detection surface 21b of the sensor that has entered until it enters the oil chamber 9, and the measurement fluid (hydraulic oil) R becomes excessive. The pressure increases. Further, since the amount of the tip detection surface 21b of the pressure sensor 21 entering the oil chamber 9 varies depending on the degree to which the washer 23 and the O-ring 25 are crushed, the pressure in the oil chamber 9 is different for each assembled weight measuring device. As a result, the pressure is generally high.

そこで、油圧調整機構16のテーパネジ18を工具にて緊締方向に回転することで、油圧調整孔部17内のテーパネジ18を大気側17b方向に移動させて油室9の容積を微小に拡大し、過剰となっている油室9内の圧力を低下させる。このとき、圧力センサ21による電圧信号を確認しつつ、圧力値が目標の公差内に入るように調整する。
このように、組み立て後に荷重測定装置内の油圧を調整して管理することができるようになったため、個別に測定値の検定をする必要もない。
Therefore, by rotating the taper screw 18 of the hydraulic adjustment mechanism 16 in the tightening direction with a tool, the taper screw 18 in the hydraulic adjustment hole 17 is moved in the direction toward the atmosphere side 17b, and the volume of the oil chamber 9 is slightly expanded. The pressure in the oil chamber 9 that is excessive is reduced. At this time, while confirming the voltage signal from the pressure sensor 21, the pressure value is adjusted to fall within the target tolerance.
As described above, since the hydraulic pressure in the load measuring device can be adjusted and managed after assembly, it is not necessary to individually verify the measured values.

なお、本実施形態では、油圧調整孔部17及びテーパネジ18が取付部7の上面7a(大気側)に向けて縮径するテーパ形状としているため、油室9の圧力を低下させるために、テーパネジ18を緊締する方向(油圧調整孔部17の大気側端17bの方向)に回転させる。このとき、螺合するテーパネジ18の雄ネジ部18cと油圧調整孔部17の雌ネジ部17cとの噛み合せは、高い回転トルクによる緊締により、油圧の調整前よりも緊密となるため、測定流体(作動油)Rが密封されて漏れる虞もなくなる。
言い換えれば、仮に、油圧調整孔部17及びテーパネジ18が取付部7の上面7a(大気側)に向けて拡径するテーパ形状であった場合には、測定流体(作動油)Rが密封されず漏れる虞がある。すなわち、上記圧力の調整において、テーパネジ18を油圧調整孔部17の大気側端17bの方向に移動させた場合、螺合するテーパネジ18の雄ネジ部18cと油圧調整孔部17の雌ネジ部17cとの噛み合せが解かれる方向に回転するため、測定流体(作動油)Rが漏れる隙間が生じてしまう。このため、本実施形態では、油圧調整孔部17及びテーパネジ18が取付部7の上面7a(大気側)に向けて縮径するテーパ形状に形成されている。
In this embodiment, since the oil pressure adjusting hole 17 and the taper screw 18 have a tapered shape with a diameter decreasing toward the upper surface 7a (atmosphere side) of the mounting portion 7, a taper screw is used to reduce the pressure in the oil chamber 9. 18 is rotated in the tightening direction (the direction of the atmospheric pressure side end 17b of the hydraulic pressure adjusting hole 17). At this time, the engagement between the male screw portion 18c of the taper screw 18 to be screwed and the female screw portion 17c of the hydraulic pressure adjusting hole portion 17 becomes tighter than before adjustment of the hydraulic pressure due to tightening by a high rotational torque. There is no risk that the hydraulic fluid (R) is sealed and leaks.
In other words, if the oil pressure adjusting hole 17 and the taper screw 18 have a tapered shape that expands toward the upper surface 7a (atmosphere side) of the mounting portion 7, the measurement fluid (hydraulic oil) R is not sealed. There is a risk of leakage. That is, in adjusting the pressure, when the taper screw 18 is moved in the direction of the atmospheric side end 17b of the hydraulic adjustment hole 17, the male screw 18c of the taper screw 18 to be screwed and the female screw 17c of the hydraulic adjustment hole 17 are engaged. Rotates in a direction in which the meshing fluid is disengaged, a gap in which the measurement fluid (hydraulic oil) R leaks is generated. For this reason, in the present embodiment, the hydraulic pressure adjusting hole 17 and the taper screw 18 are formed in a tapered shape whose diameter is reduced toward the upper surface 7 a (atmosphere side) of the mounting portion 7.

また、本実施形態では、一つの油圧調整機構16を備えた場合を想定しているが、油圧調整機構16の数はこれに限定解釈されるものではなく、上記圧力の調整において必要とされる油室9の容積拡大量に応じて複数の油圧調整機構16が備えられても良い。その場合の増設された油圧調整機構16の構成については、上述した油圧調整機構16と同様の構成とすれば良い。   In the present embodiment, it is assumed that one hydraulic pressure adjusting mechanism 16 is provided. However, the number of the hydraulic pressure adjusting mechanisms 16 is not limited to this, and is required for the pressure adjustment. A plurality of hydraulic adjustment mechanisms 16 may be provided according to the volume expansion amount of the oil chamber 9. In this case, the configuration of the added hydraulic adjustment mechanism 16 may be the same as that of the hydraulic adjustment mechanism 16 described above.

このように、圧力が一定となるように管理された油室9には、所定の測定流体Rが気泡を発生させることなく一杯に密封充填されている。測定流体Rは、ピストン43の移動によってかかる圧力が変化可能である。   In this way, the oil chamber 9 that is managed so as to have a constant pressure is filled with a predetermined measurement fluid R in a fully sealed manner without generating bubbles. The pressure applied to the measuring fluid R can be changed by the movement of the piston 43.

インナーカラー33は、本実施形態では、取付部7の環状壁部7cに囲まれた領域内に収まる程度の鉛直方向の厚みをもって形成された所定の短尺円筒状に形成された本体部33aと、本体部33aの上面の中心に小径円筒状に立ち上げられた円筒状突部33bとを有して構成されている。   In the present embodiment, the inner collar 33 has a main body portion 33a formed in a predetermined short cylindrical shape formed with a thickness in a vertical direction so as to be within a region surrounded by the annular wall portion 7c of the mounting portion 7. A cylindrical projection 33b raised in a small-diameter cylindrical shape is formed at the center of the upper surface of the main body 33a.

円筒状突部33bは、取付部7の下面7bの中心に凹設されている嵌合孔部7iに嵌合可能な外径を有しているとともに、懸架装置1を構成するショックアブソーバ3のロッド3a先端と、ロッド3a先端に固定されるナット4を収容可能な収容孔部33cを貫通して形成している。   The cylindrical protrusion 33 b has an outer diameter that can be fitted into a fitting hole 7 i that is recessed in the center of the lower surface 7 b of the mounting portion 7, and the shock absorber 3 that constitutes the suspension device 1. A rod 3a tip and an accommodation hole 33c capable of accommodating the nut 4 fixed to the rod 3a tip are formed so as to penetrate therethrough.

本体部33aは、取付部7の嵌合孔部7iに円筒状突部33bを嵌合して配設した際に、ダイアフラム収容凹部13の内側の面部13aと対向する大きさに形成されている。
本体部33aの上面33a´と、前記取付部7の下面7bにおける前記開口領域9dより内側の面部(ダイアフラム収容凹部13の内側の面部13a)と、の間で、前記ダイアフラム11の第一の密封領域27を挟み込んで密封固定している。
The main body 33a is formed to have a size facing the inner surface 13a of the diaphragm housing recess 13 when the cylindrical protrusion 33b is fitted and disposed in the fitting hole 7i of the mounting portion 7. .
A first seal of the diaphragm 11 between the upper surface 33a ′ of the main body portion 33a and a surface portion (surface portion 13a inside the diaphragm housing recess 13) inside the opening region 9d in the lower surface 7b of the mounting portion 7. The region 27 is sandwiched and sealed.

アウターカラー35は、本実施形態では、取付部7の環状壁部7cに囲まれた領域内に収まる程度の鉛直方向の厚みをもって形成された所定の短尺円筒状に形成された本体部35aと、本体部35aの中心に設けた挿通孔35bと、挿通孔35bよりも僅かに外径方向にずれた位置で、本体部35aの下面から円筒状に垂設された円筒状垂設部35cとを有して構成されている。   In the present embodiment, the outer collar 35 has a main body portion 35a formed in a predetermined short cylindrical shape formed with a thickness in a vertical direction so as to be within a region surrounded by the annular wall portion 7c of the mounting portion 7. An insertion hole 35b provided at the center of the main body portion 35a and a cylindrical hanging portion 35c that is suspended from the lower surface of the main body portion 35a in a cylindrical shape at a position slightly displaced in the outer diameter direction from the insertion hole 35b. It is configured.

本体部35aは、取付部7の環状壁部7cの内周面に嵌合可能な外径を有するとともに、ダイアフラム収容凹部13の外側の面部13bと対向する内径を有する大きさに形成されている。
本体部35aの上面35a´と、前記取付部7の下面7bにおける前記開口領域9dより外側の面部(ダイアフラム収容凹部13の外側の面部13b)と、の間で、前記ダイアフラム11の第二密封領域29を挟み込んで密封固定している。
また、本実施形態では、前記取付部7に設けたボルト挿通孔7gと鉛直方向で同軸上に同径のボルト挿通孔(大径)35dを同一数設けるとともに、ストッパを締結固定するためのボルト固定孔7hと同径のボルト挿通孔(小径)35eを同一数設けている。
The main body portion 35 a has an outer diameter that can be fitted to the inner peripheral surface of the annular wall portion 7 c of the attachment portion 7, and has a size that has an inner diameter that faces the outer surface portion 13 b of the diaphragm housing recess 13. .
The second sealed region of the diaphragm 11 between the upper surface 35a ′ of the main body portion 35a and the surface portion outside the opening region 9d (the surface portion 13b outside the diaphragm housing recess 13) on the lower surface 7b of the mounting portion 7. 29 is sandwiched and sealed.
In the present embodiment, the same number of bolt insertion holes (large diameter) 35d having the same diameter are provided on the same axis in the vertical direction as the bolt insertion holes 7g provided in the mounting portion 7, and bolts for fastening and fixing the stoppers. The same number of bolt insertion holes (small diameters) 35e having the same diameter as the fixing holes 7h are provided.

円筒状垂設部35cは、後述するブッシュ47とストッパ部49との間に配設可能な鉛直方向長さと外径及び内径を有して形成されている。   The cylindrical hanging portion 35c has a vertical length, an outer diameter, and an inner diameter that can be disposed between a bush 47 and a stopper portion 49, which will be described later.

従って、本実施形態では、インナーカラー33の本体部33aの外径とアウターカラー35の本体部35aの内径との間には、略ドーム状に形成される溝部9cと対向する環状の隙間37が形成され、この隙間37に、後述するピストン43が対向して配設される。   Therefore, in the present embodiment, an annular gap 37 facing the groove portion 9c formed in a substantially dome shape is formed between the outer diameter of the main body portion 33a of the inner collar 33 and the inner diameter of the main body portion 35a of the outer collar 35. A piston 43, which will be described later, is arranged to face the gap 37.

本実施形態では、ダイアフラム11の第一密封領域27の上面部27a及び第二密封領域29の上面部29aと取付部7の下面(ダイアフラム収容凹部13の内側の面部13aと外側の面部13b)との間の密封固定領域A1,A2と、ダイアフラム11の第一密封領域27の下面部27bとインナーカラー33の上面33a´との間の密封固定領域A3と、第二密封領域29の下面部29とアウターカラー35の上面35a´との間の密封固定領域A4は、それぞれ面シールによる密封構造を採用している。   In the present embodiment, the upper surface portion 27a of the first sealing region 27 of the diaphragm 11, the upper surface portion 29a of the second sealing region 29, the lower surface of the mounting portion 7 (the inner surface portion 13a and the outer surface portion 13b of the diaphragm housing recess 13), Sealing fixing regions A1 and A2 between them, a sealing fixing region A3 between the lower surface portion 27b of the first sealing region 27 of the diaphragm 11 and the upper surface 33a 'of the inner collar 33, and a lower surface portion 29 of the second sealing region 29. The sealing and fixing region A4 between the outer collar 35 and the upper surface 35a 'of the outer collar 35 employs a sealing structure by surface sealing.

また、これら面シールによる密封構造とともに、別途シール部材による密封構造をも併せて採用している。   In addition to the sealing structure using these face seals, a sealing structure using a separate sealing member is also employed.

本実施形態では、ダイアフラム収容凹部13の内側の面部13aと外側の面部13bに大小径の異なる二つの環状のシール溝39を設けるとともに、それぞれのシール溝39にOリング41を挿入して第一密封領域27の上面部27a及び第二密封領域29の上面部29aとの間で前記Oリング41が圧縮されて密封している。   In the present embodiment, two annular seal grooves 39 having different large and small diameters are provided on the inner surface portion 13 a and the outer surface portion 13 b of the diaphragm housing recess 13, and an O-ring 41 is inserted into each seal groove 39. The O-ring 41 is compressed and sealed between the upper surface portion 27 a of the sealing region 27 and the upper surface portion 29 a of the second sealing region 29.

本実施形態では、さらに、インナーカラー33の上面33a´とアウターカラー35の上面35a´にそれぞれ大小径の異なる二つの環状のシール溝39設けるとともに、それぞれのシール溝39にOリング41を挿入して第一密封領域27の下面部27b及び第二密封領域29の下面部29bとの間、取付部7の下面7bとの間で、前記それぞれのOリング41が圧縮されて密封している。   In the present embodiment, two annular seal grooves 39 having different diameters are provided on the upper surface 33a ′ of the inner collar 33 and the upper surface 35a ′ of the outer collar 35, and an O-ring 41 is inserted into each seal groove 39. The respective O-rings 41 are compressed and sealed between the lower surface portion 27 b of the first sealing region 27 and the lower surface portion 29 b of the second sealing region 29 and between the lower surface 7 b of the mounting portion 7.

第一密封領域27の上面部27a及び第二密封領域29の上面部29aとの間で前記Oリング41が圧縮されて密封しているため、油室9からの測定流体Rの漏洩防止が十分に図り得るが、本実施形態によれば、上述のとおり幾重もの密封構造を採用しているため、もしも第一密封領域27と第二密封領域29の密封構造から測定流体Rの漏れが発生したとしても、その他の密封構造領域にて測定流体Rの漏洩が防げるため、油室9からの測定流体Rの漏洩防止が確実に図り得る。よって、密封信頼性が極めて高いものとなる。
また、本実施形態では、上述のとおり相対移動がない領域に密封構造を設けたためシール耐久性も高い。
Since the O-ring 41 is compressed and sealed between the upper surface portion 27a of the first sealing region 27 and the upper surface portion 29a of the second sealing region 29, the leakage of the measurement fluid R from the oil chamber 9 is sufficiently prevented. However, according to the present embodiment, since the multiple sealing structures are adopted as described above, the measurement fluid R leaks from the sealing structure of the first sealing region 27 and the second sealing region 29. However, since leakage of the measurement fluid R can be prevented in other sealed structure regions, leakage of the measurement fluid R from the oil chamber 9 can be reliably prevented. Therefore, the sealing reliability is extremely high.
Moreover, in this embodiment, since the sealing structure is provided in the region where there is no relative movement as described above, the sealing durability is also high.

前記各シール部材は、密封固着領域及び当接領域を構成する一方の部材にシール溝39を設けるとともに、前記シール溝39にOリング41を挿入して他方の部材との間で前記Oリング41が圧縮されて密封しているものであればよく、シール溝39とOリング41をいずれに設けるかは限定されずいずれであっても本発明の範囲内である。   Each of the sealing members is provided with a sealing groove 39 in one member constituting a sealing and fixing region and a contact region, and an O-ring 41 is inserted into the sealing groove 39 to form the O-ring 41 with the other member. As long as the seal groove 39 and the O-ring 41 are provided, the seal groove 39 and the O-ring 41 are not limited, and any of them is within the scope of the present invention.

ピストン43は、本実施形態では、インナーカラー33の本体部33aの外径よりも小径に形成された円筒部43aと、同じくインナーカラー33の本体部33aの外径よりも小径で、円筒部43aの上端縁から水平方向に連続して一体に設けたフランジ部43bと、フランジ部43bの外周端から拡開状に鉛直方向で上方に向けて連続して一体に設けたテーパ円筒部43cと、テーパ円筒部43cの上端から連続して一体に立ち上げ形成された大径の短尺円筒部43dと、短尺円筒部43dから水平方向に連続して一体に設けられるフランジ状の押圧面部43eとで構成されている。   In the present embodiment, the piston 43 has a cylindrical portion 43a formed smaller in diameter than the outer diameter of the main body portion 33a of the inner collar 33, and a smaller diameter than the outer diameter of the main body portion 33a of the inner collar 33, and the cylindrical portion 43a. A flange portion 43b that is integrally provided continuously in the horizontal direction from the upper edge of the taper, and a tapered cylindrical portion 43c that is integrally and continuously provided upward in the vertical direction from the outer peripheral end of the flange portion 43b; A large-diameter short cylindrical portion 43d formed integrally and continuously from the upper end of the tapered cylindrical portion 43c, and a flange-shaped pressing surface portion 43e provided integrally integrally in the horizontal direction from the short cylindrical portion 43d. Has been.

前記円筒部43aは、中心に上下方向で貫通するロッド挿通孔43fを設けており、ロッド挿通孔43fは、ロッド3a先端の段差部3a´が当接可能な受け部43gを設けて大径孔部43f´と小径孔部43f´´が連続して形成されている。   The cylindrical portion 43a is provided with a rod insertion hole 43f penetrating in the vertical direction at the center, and the rod insertion hole 43f is provided with a receiving portion 43g with which a stepped portion 3a 'at the tip of the rod 3a can abut and has a large diameter hole. The part 43f ′ and the small diameter hole part 43f ″ are formed continuously.

ピストン43は、ロッド挿通孔43fに挿通して円筒部43aの上面に突出した懸架装置1を構成するショックアブソーバ3のロッド3a先端を、ナット4を介して取り付け固定して懸架装置1の長さ方向に移動可能に備えられている。
そして、前記インナーカラー33の外径と前記アウターカラー35の内径との間の環状の隙間37に、ピストン43の押圧面部43eを位置せしめ、懸架装置1のスプリング5の弾発力により前記ダイアフラム11を押圧可能に備えられている。
また、本実施形態のピストン43は、短尺円筒部43dの内面がインナーカラー33の本体部33aの外径に沿って鉛直方向に進退可能にガイドされている(図面による横方向からの荷重(水平方向荷重)はインナーカラー33が受けることとなる)。
また、ピストン43とインナーカラー33の外径との摺接領域は、径方向に位置決めされる必要があるため、印籠構造を採用している。
The piston 43 is inserted into the rod insertion hole 43f and protrudes from the upper surface of the cylindrical portion 43a, and the tip of the rod 3a of the shock absorber 3 constituting the suspension device 1 is attached and fixed via the nut 4 to fix the length of the suspension device 1. It is provided to be movable in the direction.
Then, the pressing surface 43 e of the piston 43 is positioned in an annular gap 37 between the outer diameter of the inner collar 33 and the inner diameter of the outer collar 35, and the diaphragm 11 is caused by the elastic force of the spring 5 of the suspension device 1. Is provided so that it can be pressed.
Further, the piston 43 of the present embodiment is guided so that the inner surface of the short cylindrical portion 43d can advance and retreat in the vertical direction along the outer diameter of the main body portion 33a of the inner collar 33 (load from the lateral direction (horizontal according to the drawing) (Direction load) is received by the inner collar 33).
Further, since the sliding contact area between the piston 43 and the outer diameter of the inner collar 33 needs to be positioned in the radial direction, a stamping structure is adopted.

本実施形態においてピストン43は、パッド45を介してダイアフラム11に当接する構造を採用している。
パッド45は、ダイアフラム11の押圧領域31の下面に当接可能な径の環状に形成されており、特に限定解釈されるものではないが、ダイアフラム11とピストン43との間で摺動するため、自己潤滑性に優れた硬質の合成樹脂材、例えばデルリン(登録商標)等のポリアセタール樹脂からなるものなどが好ましい。
なお、パッド45を介さずに直接ピストン43が当接する形態であっても本発明の範囲内である。
また、本実施形態では、ピストン43の押圧面部43eの上面の内径寄りには、周方向に連続して鉛直方向で上方に向けて突設された環状の突条61が一体に設けられている。この突条61は、ピストン43の押圧面部43eの上面に当接するパッド45の内径が嵌合する外径を有しており、パッド45の水平方向のずれを抑止している。
In the present embodiment, the piston 43 employs a structure that abuts against the diaphragm 11 via a pad 45.
The pad 45 is formed in an annular shape having a diameter capable of coming into contact with the lower surface of the pressing region 31 of the diaphragm 11, and is not particularly limited, but is slid between the diaphragm 11 and the piston 43. A hard synthetic resin material excellent in self-lubricating property, for example, a material made of polyacetal resin such as Delrin (registered trademark) is preferable.
It should be noted that even if the piston 43 is in direct contact without the pad 45 being interposed, it is within the scope of the present invention.
Further, in the present embodiment, an annular ridge 61 is integrally provided near the inner diameter of the upper surface of the pressing surface portion 43e of the piston 43 so as to protrude upward in the vertical direction continuously in the circumferential direction. . The protrusion 61 has an outer diameter with which the inner diameter of the pad 45 abutting on the upper surface of the pressing surface portion 43e of the piston 43 is fitted, and suppresses the horizontal displacement of the pad 45.

ブッシュ47は、ピストン43の円筒部43aを内装可能な円筒状の貫通孔47bを備えた大径状円筒部47aと、大径状円筒部47aの上端から水平方向で外側に向けて連続して一体に設けたフランジ部47cと、フランジ部47cの外周縁から水平方向で外側に向けて突設した環状の係止片47dと、フランジ部47cの上面から鉛直方向で上方に向けて突設した環状壁部47eとを備えて構成されている。大径状円筒部47aは上下面を開口して形成されている。フランジ部47cの下面には、懸架装置1を構成するコイルスプリング5の一端(上端)5aが鉛直方向で突き当たる(図1参照。)。   The bush 47 is continuous from the upper end of the large-diameter cylindrical portion 47a toward the outside in the horizontal direction, with a large-diameter cylindrical portion 47a provided with a cylindrical through-hole 47b that can house the cylindrical portion 43a of the piston 43. The flange portion 47c provided integrally, the annular locking piece 47d projecting outward in the horizontal direction from the outer periphery of the flange portion 47c, and projecting upward in the vertical direction from the upper surface of the flange portion 47c. And an annular wall 47e. The large-diameter cylindrical portion 47a is formed by opening the upper and lower surfaces. One end (upper end) 5a of the coil spring 5 constituting the suspension device 1 abuts on the lower surface of the flange portion 47c in the vertical direction (see FIG. 1).

本実施形態においてブッシュ47は、ストッパ部49を介して取付部7に一体に備えられている。   In the present embodiment, the bush 47 is provided integrally with the mounting portion 7 via the stopper portion 49.

ストッパ部49は、懸架装置1への取り付け作業性を向上させるために採用されているものであって、本実施形態では、アウターカラー35と同一外径で、かつ内径はアウターカラー35の下面に突設されている円筒状垂設部35cよりも僅かに大径で遊嵌可能あるいは同径で嵌合可能な円環状に形成された環状取付部49aと、環状取付部49aの内径から鉛直方向で下方に向けて垂設された円筒部49bと、円筒部49bの下端から水平方向で内側に向けて突設された係止鍔部49cとで構成されている。
環状取付部49aには、アウターカラー35のボルト挿通孔35eと取付部7のボルト固定孔7hとに鉛直方向で同軸に配されるようにボルト挿通孔49dが形成されている。
The stopper portion 49 is employed to improve the workability of attachment to the suspension device 1. In this embodiment, the stopper portion 49 has the same outer diameter as the outer collar 35 and the inner diameter is on the lower surface of the outer collar 35. An annular mounting portion 49a formed in an annular shape that can be loosely fitted with a slightly larger diameter than the projecting cylindrical hanging portion 35c or can be fitted with the same diameter, and an inner diameter of the annular mounting portion 49a in the vertical direction The cylindrical portion 49b is provided so as to hang downward, and the locking flange portion 49c is provided so as to protrude inward in the horizontal direction from the lower end of the cylindrical portion 49b.
A bolt insertion hole 49d is formed in the annular attachment portion 49a so as to be coaxially arranged in the vertical direction between the bolt insertion hole 35e of the outer collar 35 and the bolt fixing hole 7h of the attachment portion 7.

従って、ストッパ部49のボルト挿通孔49dを、アウターカラー35のボルト挿通孔35eと取付部7のボルト固定孔7hを介して同軸上に連通させ、連結ボルト20を介して締結すると、係止鍔部49cが、ブッシュ47の係止片47dを鉛直方向で下方から受けるようにして係止してブッシュ47を取付部7と一体化させることができる。
このとき、アウターカラー35の円筒状垂設部35cは、ブッシュ47の環状壁部47eの外面とストッパ部49の内面との間に形成される環状隙間51に収容される。
また、ストッパ部49を取り付けた際に、ブッシュ47の環状壁部47eの上端面とアウターカラー35の本体部35aの下面との間、及びブッシュ47の係止片47dの上面とアウターカラー35の円筒状垂設部35cの下端面との間には、それぞれ所定の隙間53,55が形成されている。この隙間53,55の範囲内でブッシュ47が鉛直方向に移動可能である。
Accordingly, when the bolt insertion hole 49d of the stopper portion 49 is connected coaxially via the bolt insertion hole 35e of the outer collar 35 and the bolt fixing hole 7h of the mounting portion 7 and fastened via the connecting bolt 20, The portion 49c can be engaged with the mounting portion 7 by receiving the engaging piece 47d of the bush 47 from below in the vertical direction.
At this time, the cylindrical hanging portion 35 c of the outer collar 35 is accommodated in an annular gap 51 formed between the outer surface of the annular wall portion 47 e of the bush 47 and the inner surface of the stopper portion 49.
Further, when the stopper portion 49 is attached, between the upper end surface of the annular wall portion 47e of the bush 47 and the lower surface of the main body portion 35a of the outer collar 35, and the upper surface of the locking piece 47d of the bush 47 and the outer collar 35. Predetermined gaps 53 and 55 are formed between the lower end surface of the cylindrical hanging portion 35c. The bush 47 can move in the vertical direction within the range of the gaps 53 and 55.

軸受装置57は、前記ピストン43の押圧面部43eの下面と、前記ブッシュ47のフランジ部47cの上面との間に介在されて相対回転可能に構成されており、本実施形態では、外輪57aと、内輪57bと、外輪57aと内輪57bとの間に組み込まれる複数個の転動体(玉)57cと、転動体57cを保持案内する保持器57dとで構成されているスラストアンギュラ玉軸受が採用されている。なお、軸受装置57の内輪57bは、ブッシュ47の環状壁部47eの内面に嵌合して備えられている。
懸架装置1のショックアブソーバ3の軸とスプリング5の軸はオフセットしているため、スプリング入力はモーメントになる。よって、モーメント荷重を受けるためスラストアンギュラ玉軸受を適用している。また、本実施形態では、前記ピストン43(パッド)とダイアフラム11との接触面を、前記スラストアンギュラ玉軸受(軸受装置)57の接触角方向の延長戦が通過するように配置している。すなわち、スプリング5の入力とダイアフラム11の荷重作用線上に軸受の荷重作用線が乗るようにスラストアンギュラ玉軸受(軸受装置)57の接触角を選択したため剛性を高く保つことができる。
The bearing device 57 is interposed between the lower surface of the pressing surface portion 43e of the piston 43 and the upper surface of the flange portion 47c of the bush 47 so as to be relatively rotatable. In this embodiment, the outer ring 57a, A thrust angular ball bearing composed of an inner ring 57b, a plurality of rolling elements (balls) 57c incorporated between the outer ring 57a and the inner ring 57b, and a cage 57d for holding and guiding the rolling elements 57c is adopted. Yes. Note that the inner ring 57 b of the bearing device 57 is fitted to the inner surface of the annular wall portion 47 e of the bush 47.
Since the axis of the shock absorber 3 of the suspension device 1 and the axis of the spring 5 are offset, the spring input becomes a moment. Therefore, a thrust angular contact ball bearing is applied to receive the moment load. In the present embodiment, the contact surface between the piston 43 (pad) and the diaphragm 11 is arranged so that the extended war in the contact angle direction of the thrust angular ball bearing (bearing device) 57 passes. That is, since the contact angle of the thrust angular ball bearing (bearing device) 57 is selected so that the load action line of the bearing is on the input of the spring 5 and the load action line of the diaphragm 11, the rigidity can be kept high.

また、本実施形態では、ピストン43の押圧面部43eがパッド45を介してダイアフラム11を押圧可能に構成した一例を説明したが、ダイアフラム11を押圧する構成はこれに限定解釈されるものではなく、懸架装置1のスプリング5の弾発力により前記ダイアフラム11を押圧可能に構成されていれば良い。例えば、前記軸受装置57の外輪57aの構成に押圧面部43eの形状を含み、外輪57aの押圧面部43eがダイアフラム11を押圧する構成であっても良い。
なお、本実施形態では、本発明による荷重測定装置を前輪用の懸架装置に組み込んだ場合を説明したが、これに限定解釈されるものではなく、後輪用の懸架装置に組み込むことも可能である。
Moreover, in this embodiment, although the example which comprised the pressing surface part 43e of the piston 43 so that the diaphragm 11 could be pressed via the pad 45 was demonstrated, the structure which presses the diaphragm 11 is not limitedly interpreted to this, What is necessary is just to be comprised so that the said diaphragm 11 can be pressed with the elastic force of the spring 5 of the suspension apparatus 1. FIG. For example, the configuration of the outer ring 57a of the bearing device 57 may include the shape of the pressing surface portion 43e, and the pressing surface portion 43e of the outer ring 57a may press the diaphragm 11.
In this embodiment, the case where the load measuring device according to the present invention is incorporated in the suspension device for the front wheels has been described. However, the present invention is not limited to this and can be incorporated in the suspension device for the rear wheels. is there.

本発明は、本実施形態に示す構成からなる懸架装置に係らず、他の構成からなる懸架装置にも利用可能である。   The present invention is not limited to the suspension device having the configuration shown in the present embodiment, but can be used for a suspension device having another configuration.

1 懸架装置
3 ショックアブソーバ
3a ロッド
5 コイルスプリング
7 取付部
7d センサ連結部
9 油室
9c 溝部
11 ダイアフラム
16 油圧調整機構
17 油圧調整孔
17a 大気側端
17b 油室側端
17c 雌ネジ部
18 テーパネジ
18a 大気側端
18b 油室側端
18c 雄ネジ部端
19 嵌合部(大気側)
19a 嵌合部(油室側)
21 圧力センサ
33 インナーカラー
35 アウターカラー
43 ピストン
47 ブッシュ
57 軸受装置
DESCRIPTION OF SYMBOLS 1 Suspension apparatus 3 Shock absorber 3a Rod 5 Coil spring 7 Mounting part 7d Sensor connection part 9 Oil chamber 9c Groove part 11 Diaphragm 16 Hydraulic adjustment mechanism 17 Hydraulic adjustment hole 17a Atmospheric side end 17b Oil chamber side end 17c Female thread part 18 Tapered screw 18a Atmosphere Side end 18b Oil chamber side end 18c Male thread end 19 Fitting part (atmosphere side)
19a Fitting part (oil chamber side)
21 Pressure sensor 33 Inner collar 35 Outer collar 43 Piston 47 Bush 57 Bearing device

Claims (2)

懸架装置に備えられ、
上面側を車両側に固定してなる取付部と、
前記懸架装置のスプリングの弾発力により移動可能なピストンと、
前記ピストンにより押圧されて変形可能なダイアフラムと、
前記取付部の下面側と前記ダイアフラムとの間で形成されるとともに、測定流体を充填してなる所定空間の油室と、
前記取付部に備えられ、前記ピストンの移動により変化可能な油室内の測定流体の圧力変化を検出し得る圧力センサと、油室内の圧力を調整する油圧調整機構とを含み、
前記油圧調整機構は、油室側と大気側とを連通し、油室側端から大気側端に向けて徐々に縮径してなるテーパ状に形成された、少なくとも1つの油圧調整孔部と、
前記油圧調整孔部を螺合しつつ移動可能で、油室側端が大径で大気側端に向けて徐々に縮径してなるテーパネジと、を備えることを特徴とする車両の重量測定装置。
Provided in the suspension system,
A mounting portion formed by fixing the upper surface side to the vehicle side;
A piston movable by the spring force of the suspension device;
A diaphragm that is deformed by being pressed by the piston;
An oil chamber in a predetermined space formed between the lower surface side of the mounting portion and the diaphragm and filled with a measurement fluid;
A pressure sensor provided in the mounting portion and capable of detecting a pressure change of the measurement fluid in the oil chamber that can be changed by movement of the piston; and a hydraulic pressure adjustment mechanism that adjusts the pressure in the oil chamber;
The hydraulic pressure adjustment mechanism communicates the oil chamber side and the atmosphere side, and has at least one hydraulic pressure adjustment hole formed in a tapered shape that is gradually reduced in diameter from the oil chamber side end toward the atmosphere side end. ,
A vehicle weight measuring device comprising: a taper screw that is movable while being screwed into the oil pressure adjusting hole, and that has an oil chamber side end having a large diameter and gradually reducing the diameter toward the atmosphere side end. .
前記テーパネジの少なくとも小径側には、油圧調整孔部と螺合したテーパネジを回転させる工具が嵌合する嵌合部を備えていることを特徴とする請求項1に記載の車両の重量測定装置。   The vehicle weight measuring device according to claim 1, further comprising a fitting portion on which at least a small diameter side of the taper screw is fitted with a tool for rotating the taper screw screwed into the hydraulic pressure adjusting hole portion.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0392071A1 (en) * 1989-04-08 1990-10-17 VDO Adolf Schindling AG Load sensor for a vehicle
JPH0599762A (en) * 1990-02-01 1993-04-23 Pfister Messtechnik Gmbh Force measuring device and manufacture thereof
WO2007091952A1 (en) * 2006-02-09 2007-08-16 Faiveley Transport Nordic Ab A weighing valve device
WO2015159899A1 (en) * 2014-04-14 2015-10-22 日本精工株式会社 Load sensor-equipped bearing device
JP2017015680A (en) * 2015-07-06 2017-01-19 日本精工株式会社 Bearing device having load sensor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0392071A1 (en) * 1989-04-08 1990-10-17 VDO Adolf Schindling AG Load sensor for a vehicle
JPH0599762A (en) * 1990-02-01 1993-04-23 Pfister Messtechnik Gmbh Force measuring device and manufacture thereof
WO2007091952A1 (en) * 2006-02-09 2007-08-16 Faiveley Transport Nordic Ab A weighing valve device
WO2015159899A1 (en) * 2014-04-14 2015-10-22 日本精工株式会社 Load sensor-equipped bearing device
JP2017015680A (en) * 2015-07-06 2017-01-19 日本精工株式会社 Bearing device having load sensor

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