JP4935267B2 - Load sensor - Google Patents

Load sensor Download PDF

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JP4935267B2
JP4935267B2 JP2006254320A JP2006254320A JP4935267B2 JP 4935267 B2 JP4935267 B2 JP 4935267B2 JP 2006254320 A JP2006254320 A JP 2006254320A JP 2006254320 A JP2006254320 A JP 2006254320A JP 4935267 B2 JP4935267 B2 JP 4935267B2
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brake
strain
detection
load sensor
disposed
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JP2008076161A (en
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茂裕 ▲吉▼内
礼孝 一宮
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Panasonic Corp
Panasonic Holdings Corp
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Panasonic Corp
Matsushita Electric Industrial Co Ltd
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本発明は、自動車のブレーキ装置において、ブレーキトルクを検出する荷重センサに関するものである。   The present invention relates to a load sensor for detecting brake torque in a brake device of an automobile.

以下、従来の荷重センサについて図面を参照しながら説明する。   Hereinafter, a conventional load sensor will be described with reference to the drawings.

図１６は荷重センサを配置した従来のブレーキステムの正面図である。   FIG. 16 is a front view of a conventional brake stem in which a load sensor is arranged.

従来のブレーキ装置は、回転軸に連結されたブレーキディスク３１と、このブレーキディスク３１を押圧しブレーキディスク３１の回転を制動するブレーキパッド（図示せず）と、ブレーキパッドを保持するブレーキキャリパ３２と、ナックルアーム３３を介してブレーキキャリパ３２を保持したナックル３４とを有する。ブレーキキャリパ３２とナックルアーム３３とは互いにボルトで固定している。   A conventional brake device includes a brake disc 31 connected to a rotating shaft, a brake pad (not shown) that presses the brake disc 31 to brake the rotation of the brake disc 31, and a brake caliper 32 that holds the brake pad. And a knuckle 34 holding a brake caliper 32 via a knuckle arm 33. The brake caliper 32 and the knuckle arm 33 are fixed to each other with bolts.

このブレーキ装置において、荷重センサ３５はナックルアーム３３に接着固定されている。ブレーキパッドによるブレーキディスク３１の挟持に起因して、ブレーキディスク３１の回転が制動されてブレーキトルクが発生する。このブレーキトルクに応じて、ブレーキキャリパ３２を介し、ブレーキディスク３１の回転方向に変形するナックルアーム３３の歪を検出している。   In this brake device, the load sensor 35 is bonded and fixed to the knuckle arm 33. Due to the holding of the brake disc 31 by the brake pads, the rotation of the brake disc 31 is braked and a brake torque is generated. In accordance with this brake torque, strain of the knuckle arm 33 that deforms in the rotational direction of the brake disk 31 is detected via the brake caliper 32.

なお、この出願の発明に関する先行技術文献としては、例えば、特許文献１が知られている。
特開平３−２７３９４８号公報 For example, Patent Document 1 is known as a prior art document relating to the invention of this application.
JP-A-3-273948

上記従来の構成では、ブレーキトルクの印加前後において、ブレーキキャリパ３２とナックルアーム３３とは、ブレーキディスク３１の回転方向に、相対的な滑りやズレが発生するので、ブレーキディスク３１の回転方向に変形するナックルアーム３３の歪を検出するにあたって、検出精度が低下するという問題点を有していた。   In the above-described conventional configuration, the brake caliper 32 and the knuckle arm 33 are displaced in the rotational direction of the brake disc 31 before and after the application of the brake torque. In detecting the strain of the knuckle arm 33, the detection accuracy is lowered.

本発明は上記問題点を解決し、検出精度を向上した荷重センサを提供することを目的としている。   An object of the present invention is to solve the above-mentioned problems and to provide a load sensor with improved detection accuracy.

上記目的を達成するために本発明は、回転軸に連結されたブレーキディスクと、前記ブレーキディスクを押圧し前記ブレーキディスクの回転を制動するブレーキパッドと、前記ブレーキパッドを保持するブレーキキャリパと、前記ブレーキキャリパを保持したナックルアームとを有するブレーキ装置において、荷重により歪を生じる起歪体と、前記起歪体に配置され歪に応じて検出値が変化する検出素子と、前記検出素子に接続される検出部と、を有し、前記起歪体は、前記ブレーキディスクの回転を制動するブレーキトルクに応じて、前記ブレーキディスクの回転軸方向に変形し、前記検出部は、前記ブレーキディスクの回転方向の歪みに起因する前記検出値の変化をキャンセルし、前記回転軸方向の変形に起因する前記検出値の変化を検出する構成である。 To achieve the above object, the present invention provides a brake disc coupled to a rotating shaft, a brake pad that presses the brake disc and brakes rotation of the brake disc, a brake caliper that holds the brake pad, In a brake device having a knuckle arm that holds a brake caliper, a strain generating body that generates strain due to a load, a detection element that is disposed on the strain generating body and whose detection value changes according to the strain, and is connected to the detection element The strain generating body is deformed in the direction of the axis of rotation of the brake disc in accordance with a brake torque that brakes rotation of the brake disc, and the detection unit is configured to rotate the brake disc. The change in the detected value due to the distortion in the direction is canceled, and the change in the detected value due to the deformation in the rotation axis direction is detected. It is configured to.

上記構成により、ブレーキディスクの回転軸方向に変形する起歪体の歪を検出するので、ブレーキキャリパとナックルアームとの回転方向に対する相対的な滑りやズレの影響を受けにくく、検出精度を向上できる。   With the above configuration, since the strain of the strain generating body that deforms in the direction of the rotation axis of the brake disc is detected, it is difficult to be affected by relative slip and displacement with respect to the rotation direction of the brake caliper and the knuckle arm, and the detection accuracy can be improved. .

以下、本発明の全請求項に記載の発明について図面を参照しながら説明する。   Hereinafter, the invention described in all claims of the present invention will be described with reference to the drawings.

図１は本発明の一実施の形態におけるブレーキ装置の分解斜視図、図２は同ブレーキ装置の斜視図、図３は同ブレーキ装置の正面図、図４は同ブレーキ装置の側面図、図５は図３のＡ−Ａ断面図である。   1 is an exploded perspective view of a brake device according to an embodiment of the present invention, FIG. 2 is a perspective view of the brake device, FIG. 3 is a front view of the brake device, FIG. 4 is a side view of the brake device, and FIG. FIG. 4 is a cross-sectional view taken along line AA in FIG. 3.

図１〜図５において、本発明の一実施の形態におけるブレーキ装置は、回転軸１ａに連結されたブレーキディスク１と、このブレーキディスク１を押圧しブレーキディスク１の回転を制動するブレーキパッド２と、ブレーキパッド２を保持するブレーキキャリパ２０と、ブレーキキャリパ２０を保持したナックルアーム５ｂとを有する。   1 to 5, a brake device according to an embodiment of the present invention includes a brake disk 1 connected to a rotating shaft 1a, and a brake pad 2 that presses the brake disk 1 to brake the rotation of the brake disk 1. The brake caliper 20 that holds the brake pad 2 and the knuckle arm 5b that holds the brake caliper 20 are provided.

ブレーキディスク１は略円形状であって、中心に回転軸１ａを有し、回転軸１ａの周りに回動自在に配置された軸受け（図示せず）に軸支されている。ブレーキパッド２は金属板２ａ上に摩擦材２ｂを形成したものである。   The brake disk 1 has a substantially circular shape, and has a rotating shaft 1a at the center, and is supported by a bearing (not shown) that is rotatably arranged around the rotating shaft 1a. The brake pad 2 is formed by forming a friction material 2b on a metal plate 2a.

ブレーキキャリパ２０は、キャリパ３とブラケット４からなる。キャリパ３は図５に示すピストン３ｂを収納した筐体３ａを有し、この筐体３ａにはピストン３ｂの潤滑油を注入する注入用穴３ｄとブラケット４を固定する固定用穴３ｃを形成している。ブラケット４はアーム部４ａを有し、アーム部４ａの内面４ｄにはブレーキパッド２が当接する。このアーム部４ａには、キャリパ３を固定する固定用穴４ｂと、ナックルアーム５ｂを連結する連結用穴４ｃとを形成している。   The brake caliper 20 includes a caliper 3 and a bracket 4. The caliper 3 has a housing 3a in which the piston 3b shown in FIG. 5 is housed. The housing 3a is formed with an injection hole 3d for injecting lubricating oil of the piston 3b and a fixing hole 3c for fixing the bracket 4. ing. The bracket 4 has an arm portion 4a, and the brake pad 2 contacts the inner surface 4d of the arm portion 4a. In the arm portion 4a, a fixing hole 4b for fixing the caliper 3 and a connecting hole 4c for connecting the knuckle arm 5b are formed.

ナックルアーム５ｂの一端にはブラケット４と連結する連結用穴５ａを形成し、ナックルアーム５ｂの他端には車体に固定される固定軸５ｃを形成している。   One end of the knuckle arm 5b is formed with a connecting hole 5a for connecting to the bracket 4, and the other end of the knuckle arm 5b is formed with a fixed shaft 5c fixed to the vehicle body.

そして、キャリパ３の固定用穴３ｃとブラケット４の固定用穴４ｂに固定用ボルト１０を挿入してキャリパ３とブラケット４とを互いに固定し、ブラケット４の連結用穴４ｃとナックルアーム５ｂの連結用穴５ａに連結用ボルト９を挿入してブラケット４とナックルアーム５ｂとを互いに連結している。   Then, the fixing bolt 10 is inserted into the fixing hole 3c of the caliper 3 and the fixing hole 4b of the bracket 4 to fix the caliper 3 and the bracket 4 to each other, and the connection hole 4c of the bracket 4 and the knuckle arm 5b are connected. The bracket 4 and the knuckle arm 5b are connected to each other by inserting a connecting bolt 9 into the hole 5a.

上記のブレーキ装置において、荷重センサ６はナックルアーム５ｂに配置しており、ブレーキディスク１面と平行な面に配置している。荷重センサ６は貫通孔からなる取付部６ａとナックルアーム５ｂに設けた固定用穴５ｄとに座金７を介して固定用ボルト８を挿入して固定している。   In the brake device described above, the load sensor 6 is disposed on the knuckle arm 5b and is disposed on a surface parallel to the surface of the brake disk 1. The load sensor 6 is fixed by inserting a fixing bolt 8 through a washer 7 into a mounting portion 6a formed of a through hole and a fixing hole 5d provided in the knuckle arm 5b.

荷重センサ６は、荷重により歪を生じる板状の起歪体６ｂと、この起歪体６ｂに配置され歪に応じて抵抗値（検出値）が変化する歪抵抗からなる検出素子６ｅと、検出素子６ｅに結線され起歪体６ｂの歪を検出する検出回路を有し、ブレーキディスク１の回転を制動するブレーキトルクに応じて、ブレーキディスク１の回転軸方向に変形する起歪体６ｂの歪を検出している。   The load sensor 6 includes a plate-like strain generating body 6b that generates strain due to a load, a detection element 6e that is disposed on the strain generating body 6b and has a resistance value (detection value) that changes according to the strain, and a detection element 6e. The strain of the strain generating body 6b that is connected to the element 6e and that detects the strain of the strain generating body 6b and deforms in the direction of the rotation axis of the brake disc 1 in accordance with the brake torque that brakes the rotation of the brake disc 1 Is detected.

起歪体６ｂは、ステンレス材からなる板状であって、ナックルアーム５ｂと固定するための固定用の取付部６ａを２つ設けている。取付部６ａは貫通孔である。   The strain body 6b has a plate shape made of a stainless material, and is provided with two fixing portions 6a for fixing to the knuckle arm 5b. The attachment portion 6a is a through hole.

起歪体６ｂに設けた２つの取付部６ａの間に２つの取付部６ａを結ぶ軸と直角方向に第１、第２の検出素子６ｅを配置するとともに、取付部６ａと起歪体６ｂの端面との間に第１、第２の固定抵抗６ｆを配置し、第１、第２の検出素子６ｅを対向配置させるとともに、第１、第２の固定抵抗６ｆを対向配置させるように配線６ｄを引き回し、図６に示すようなブリッジ回路を検出回路としている。   The first and second detection elements 6e are arranged in a direction perpendicular to the axis connecting the two mounting portions 6a between the two mounting portions 6a provided on the strain generating body 6b, and the mounting portions 6a and the strain generating body 6b. The first and second fixed resistors 6f are arranged between the end faces, the first and second detection elements 6e are arranged to face each other, and the first and second fixed resistors 6f are arranged to face each other. The bridge circuit as shown in FIG. 6 is used as a detection circuit.

この荷重サンサ６は、図７に示すように、２つの取付部６ａを設けた起歪体６ｂに絶縁層６ｃを形成し、この絶縁層６ｃ上に第１、第２の検出素子６ｅおよび第１、第２の固定抵抗６ｆを形成するとともに、互いに結線してブリッジ回路を形成し、これらブリッジ回路上にガラスを主剤とした保護コート６ｇを焼成により形成している。   As shown in FIG. 7, the load sensor 6 has an insulating layer 6c formed on a strain body 6b provided with two mounting portions 6a, and the first and second detection elements 6e and the second detecting element 6e are formed on the insulating layer 6c. The first and second fixed resistors 6f are formed and connected to each other to form a bridge circuit, and a protective coat 6g mainly composed of glass is formed on the bridge circuit by firing.

上記荷重センサを配置したブレーキ装置における荷重測定について説明する。   The load measurement in the brake device in which the load sensor is arranged will be described.

ブレーキペダルの作動に応じて発生する油圧が油圧配管部に伝達されると、キャリパ３のピストン３ｂが作動し、ブレーキパッド２の摩擦材２ｂが回転するブレーキディスク１に押圧されて、ブレーキディスク１の回転が制動される。制動される際に、ブレーキパッド２はブラケット４のアーム部４ａの内面４ｄに当接し、当接した方のブラケット４のアーム部４ａがブレーキディスク１の回転方向に変形するとともに、この当接力の発生位置とナックルアーム５ｂの固定関係に起因してモーメントを発生し、ブレーキディスク１の回転軸方向にもブラケット４のアーム部４ａが変形する。   When the hydraulic pressure generated in response to the operation of the brake pedal is transmitted to the hydraulic piping section, the piston 3b of the caliper 3 is operated, and the friction material 2b of the brake pad 2 is pressed against the rotating brake disc 1, so that the brake disc 1 The rotation of the is braked. When braking, the brake pad 2 comes into contact with the inner surface 4d of the arm portion 4a of the bracket 4, and the arm portion 4a of the bracket 4 on the contact side is deformed in the rotation direction of the brake disc 1, and this contact force is reduced. A moment is generated due to the fixed relationship between the generation position and the knuckle arm 5 b, and the arm portion 4 a of the bracket 4 is deformed also in the direction of the rotation axis of the brake disk 1.

同様に当接した方のブラケット４のアーム部４ａに固定されているナックルアーム５ｂもブレーキディスク１の回転方向とブレーキディスク１の回転軸方向の変位をする。この時、変形前と変形後のナックルアーム５ｂの正面図は図９（ａ）、平面図は図９（ｂ）のとおりであり、変形前と変形後のブラケット４の正面図は図８（ａ）、平面図は図８（ｂ）のとおりである。   Similarly, the knuckle arm 5b fixed to the arm portion 4a of the bracket 4 that is in contact also displaces in the rotational direction of the brake disc 1 and in the rotational axis direction of the brake disc 1. At this time, a front view of the knuckle arm 5b before and after the deformation is shown in FIG. 9A, and a plan view thereof is shown in FIG. 9B. A front view of the bracket 4 before and after the deformation is shown in FIG. a) The plan view is as shown in FIG.

このナックルアーム５ｂの変形に伴い荷重センサ６の起歪体６ｂもブレーキディスク１の回転方向とブレーキディスク１の回転軸方向に歪む。この荷重センサ６の起歪体６ｂの歪はいずれもブレーキトルクに比例したものである。   Along with the deformation of the knuckle arm 5b, the strain body 6b of the load sensor 6 is also distorted in the rotation direction of the brake disc 1 and the rotation axis direction of the brake disc 1. The strain of the strain generating body 6b of the load sensor 6 is proportional to the brake torque.

上記構成により、ブレーキディスク１の回転軸方向に変形する起歪体６ｂの歪を検出するので、ブレーキキャリパ２０とナックルアーム５ｂとの回転方向に対する相対的な滑りやズレの影響を受けにくく、検出精度を向上できる。   With the above configuration, since the distortion of the strain generating body 6b that deforms in the direction of the rotation axis of the brake disc 1 is detected, it is difficult to be affected by relative slip and displacement with respect to the rotation direction of the brake caliper 20 and the knuckle arm 5b. Accuracy can be improved.

特に、起歪体６ｂに設けた２つの取付部６ａの間に２つの取付部６ａを結ぶ軸と直角方向に第１、第２の検出素子６ｅを配置するとともに、取付部６ａと起歪体６ｂの端面との間に第１、第２の固定抵抗６ｆを配置し、第１、第２の検出素子６ｅを対向配置するとともに、第１、第２の固定抵抗６ｆを対向配置したブリッジ回路を検出回路としているので、ブレーキディスク１の回転方向の歪はほぼキャンセルされ、ブレーキディスク１の回転軸方向の歪のみをほぼ検出することができ、検出精度を向上できる。これは、２つの取付部６ａの間の歪よりも取付部６ａと端面との間の歪の方が歪量が小さくなるので、第１、第２の検出素子６ｅは歪に応じて検出値は変化するが、第１、第２の固定抵抗６ｆはほとんど抵抗変化しないからである。   In particular, the first and second detection elements 6e are arranged in a direction perpendicular to the axis connecting the two mounting portions 6a between the two mounting portions 6a provided on the strain generating body 6b, and the mounting portion 6a and the strain generating body. A bridge circuit in which the first and second fixed resistors 6f are arranged between the end faces of 6b, the first and second detection elements 6e are arranged to face each other, and the first and second fixed resistors 6f are arranged to face each other. Therefore, the distortion in the rotation direction of the brake disc 1 is almost canceled, and only the distortion in the rotation axis direction of the brake disc 1 can be almost detected, so that the detection accuracy can be improved. This is because the strain amount between the mounting portion 6a and the end surface is smaller than the strain between the two mounting portions 6a, and therefore the first and second detection elements 6e detect the detected values according to the strain. This is because the resistance of the first and second fixed resistors 6f hardly changes.

なお、本発明の一実施の形態では、荷重センサ６の起歪体６ｂはナックルアーム５ｂに配置したが、荷重センサ６をナックルアーム５ｂに配置せずに、図１０、図１１に示すように、ブレーキキャリパ２０のブラケット４に配置するとともに、ブレーキディスク１面と平行な面に配置してもよい。   In the embodiment of the present invention, the strain body 6b of the load sensor 6 is disposed on the knuckle arm 5b. However, the load sensor 6 is not disposed on the knuckle arm 5b, as shown in FIGS. The brake caliper 20 may be disposed on the bracket 4 and may be disposed on a surface parallel to the surface of the brake disk 1.

この際、図１２に示すように、ブレーキキャリパ２０のブラケット４のアーム部４ａには、荷重センサ６の起歪体６ｂを取り付け固定するための固定用の固定穴４ｅを設け、固定用の固定穴４ｅと起歪体６ｂの取付部６ａが一致するようにボルトで固定すればよい。上記構成により、ブレーキキャリパ２０のブラケット４において、ブレーキディスク１の回転軸方向に変形する起歪体６ｂの歪を検出でき、検出精度を向上できる。   At this time, as shown in FIG. 12, the arm portion 4a of the bracket 4 of the brake caliper 20 is provided with a fixing hole 4e for fixing and fixing the strain body 6b of the load sensor 6, and fixing for fixing. What is necessary is just to fix with the volt | bolt so that the hole 4e and the attaching part 6a of the strain body 6b may correspond. With the above configuration, in the bracket 4 of the brake caliper 20, the strain of the strain generating body 6b that deforms in the direction of the rotation axis of the brake disc 1 can be detected, and the detection accuracy can be improved.

また、図１３、図１４に示すように、荷重センサ６の起歪体６ｂを介して、ナックルアーム５ｂがブレーキキャリパ２０を保持するようにしてもよい。   Further, as shown in FIGS. 13 and 14, the knuckle arm 5 b may hold the brake caliper 20 via the strain body 6 b of the load sensor 6.

起歪体６ｂの２つの取付部６ａの内、一方はブラケット４の連結用穴４ｃと一致させ、他方はナックルアーム５ｂの一端の固定穴５ａと一致させ、ボルトで固定すればよい。上記構成により、ブレーキキャリパ２０のブラケット４において、ブレーキディスク１の回転軸方向に変形する起歪体の歪を検出でき、検出精度を向上できる。   One of the two attachment portions 6a of the strain body 6b may be matched with the connection hole 4c of the bracket 4, and the other may be matched with the fixing hole 5a at one end of the knuckle arm 5b and fixed with a bolt. With the above configuration, the bracket 4 of the brake caliper 20 can detect the strain of the strain generating body that is deformed in the direction of the rotation axis of the brake disc 1, and the detection accuracy can be improved.

また、図１５に示すように、荷重センサ６の起歪体６ｂに感温抵抗１１を配置してもよい。起歪体６ｂの温度変化を感温抵抗１１でモニターすることによって、起歪体６ｂの温度変化に起因して変化する検出素子６ｅの検出値や固定抵抗６ｆの抵抗値を補正でき、検出精度を向上できる。   Further, as shown in FIG. 15, a temperature sensitive resistor 11 may be arranged on the strain body 6 b of the load sensor 6. By monitoring the temperature change of the strain body 6b with the temperature sensitive resistor 11, the detection value of the detection element 6e and the resistance value of the fixed resistor 6f that change due to the temperature change of the strain body 6b can be corrected, and the detection accuracy Can be improved.

また、起歪体６ｂの取付部６ａと起歪体６ｂの端面との間に第１、第２の固定抵抗６ｆを用いずに、第３、第４の検出素子６ｅを配置し、第１、第２の検出素子６ｅを対向配置するとともに、第３、第４の検出素子６ｅを対向配置したブリッジ回路を検出回路としてもよい。   Further, the first and second fixed resistors 6f are not used between the attachment portion 6a of the strain generating body 6b and the end surface of the strain generating body 6b, and the third and fourth detection elements 6e are disposed, and the first A bridge circuit in which the second detection elements 6e are arranged to face each other and the third and fourth detection elements 6e are arranged to face each other may be used as the detection circuit.

以上のように本発明にかかる荷重センサは検出感度を向上でき、各種センサ機器に適用できる。   As described above, the load sensor according to the present invention can improve detection sensitivity and can be applied to various sensor devices.

本発明の一実施の形態におけるブレーキ装置の分解斜視図The disassembled perspective view of the brake device in one embodiment of this invention 同ブレーキ装置の斜視図Perspective view of the brake device 同ブレーキ装置の正面図Front view of the brake device 同ブレーキ装置の側面図Side view of the brake device 図３のＡ−Ａ断面図AA sectional view of FIG. 同荷重センサのブリッジ回路図Bridge circuit diagram of the load sensor 同ブレーキ装置に用いる荷重センサの組み立て工程図Assembly process diagram of the load sensor used in the brake device 同ブレーキ装置に用いるブラケットの変形状態を示す説明図Explanatory drawing which shows the deformation | transformation state of the bracket used for the brake device 同ブレーキ装置に用いるナックルアームの変形状態を示す説明図Explanatory drawing which shows the deformation | transformation state of the knuckle arm used for the brake device 他のブレーキ装置の正面図Front view of other brake devices 他のブレーキ装置の側面図Side view of other brake devices 他のブレーキ装置に用いるブラケットの斜視図Perspective view of bracket used for other brake devices 他のブレーキ装置の正面図Front view of other brake devices 他のブレーキ装置の側面図Side view of other brake devices 他の荷重センサの斜視図Perspective view of another load sensor 従来のブレーキ装置の正面図Front view of a conventional brake device

符号の説明Explanation of symbols

１ ブレーキディスク
１ａ 回転軸
２ ブレーキパッド
２ａ 金属板
２ｂ 摩擦材
３ キャリパ
３ａ 筐体
３ｂ ピストン
３ｃ 固定用穴
３ｄ 注入用穴
４ ブラケット
４ａ アーム部
４ｂ 固定用穴
４ｃ 連結用穴
４ｄ 内面
５ａ 連結用穴
５ｂ ナックルアーム
５ｃ 固定軸
５ｄ 固定用穴
６ 荷重センサ
６ａ 取付部
６ｂ 起歪体
６ｃ 絶縁層
６ｄ 配線
６ｅ 検出素子
６ｆ 固定抵抗
７ 座金
８ 固定用ボルト
９ 連結用ボルト
１０ 固定用ボルト
１１ 感温抵抗
２０ ブレーキキャリパ DESCRIPTION OF SYMBOLS 1 Brake disk 1a Rotating shaft 2 Brake pad 2a Metal plate 2b Friction material 3 Caliper 3a Housing 3b Piston 3c Fixing hole 3d Injection hole 4 Bracket 4a Arm part 4b Fixing hole 4c Connecting hole 4d Inner surface 5a Connecting hole 5b Knuckle arm 5c Fixed shaft 5d Fixing hole 6 Load sensor 6a Mounting part 6b Straining body 6c Insulating layer 6d Wiring 6e Detection element 6f Fixed resistor 7 Washer 8 Fixing bolt 9 Fixing bolt 10 Fixing bolt 11 Temperature sensitive resistance 20 Brake Calipers

Claims (6)

回転軸に連結されたブレーキディスクと、前記ブレーキディスクを押圧し前記ブレーキディスクの回転を制動するブレーキパッドと、前記ブレーキパッドを保持するブレーキキャリパと、前記ブレーキキャリパを保持したナックルアームとを有するブレーキ装置において、
荷重により歪を生じる起歪体と、前記起歪体に配置され歪に応じて検出値が変化する検出素子と、
前記検出素子に接続される検出部と、
を有し、
前記起歪体は、前記ブレーキディスクの回転を制動するブレーキトルクに応じて、前記ブレーキディスクの回転軸方向に変形し、
前記検出部は、前記ブレーキディスクの回転方向の歪みに起因する前記検出値の変化をキャンセルし、前記回転軸方向の変形に起因する前記検出値の変化を検出する
荷重センサ。 A brake having a brake disk connected to a rotating shaft, a brake pad that presses the brake disk and brakes rotation of the brake disk, a brake caliper that holds the brake pad, and a knuckle arm that holds the brake caliper In the device
A strain generating body that generates strain due to a load, and a detection element that is disposed in the strain generating body and whose detection value changes according to the strain;
A detection unit connected to the detection element;
Have
The strain body is deformed in the direction of the rotation axis of the brake disc according to a brake torque for braking the rotation of the brake disc,
The load sensor detects a change in the detected value due to the deformation in the rotation axis direction by canceling the change in the detected value due to the distortion in the rotation direction of the brake disc . 前記起歪体は、前記ナックルアームまたは前記ブレーキキャリパに配置するとともに、前記ブレーキディスク面と平行な面に配置した請求項１記載の荷重センサ。 The load sensor according to claim 1, wherein the strain body is disposed on the knuckle arm or the brake caliper and is disposed on a plane parallel to the brake disc surface. 前記ナックルアームは前記起歪体を介して前記ブレーキキャリパを保持する請求項１記載の荷重センサ。 The load sensor according to claim 1, wherein the knuckle arm holds the brake caliper via the strain body. 前記検出素子に結線され前記起歪体の歪を検出する検出回路を有し、前記起歪体に設けた２つの取付部の間に第１、第２の前記検出素子を配置するとともに、前記取付部と前記起歪体の端面との間に第３、第４の前記検出素子を配置し、第１、第２の前記検出素子を対向配置するとともに、第３、第４の前記検出素子を対向配置したブリッジ回路を前記検出回路とした請求項１記載の荷重センサ。 A detection circuit which is connected to the detection element and detects strain of the strain generating body, and the first and second detection elements are disposed between two mounting portions provided on the strain generation body, and The third and fourth detection elements are arranged between the mounting portion and the end face of the strain generating body, the first and second detection elements are arranged opposite to each other, and the third and fourth detection elements are arranged. The load sensor according to claim 1, wherein the detection circuit is a bridge circuit in which the two are opposed to each other. 前記検出素子に結線され前記起歪体の歪を検出する検出回路を有し、前記起歪体に設けた２つの取付部の間に第１、第２の前記検出素子を配置するとともに、前記取付部と前記起歪体の端面との間に第１、第２の固定抵抗を配置し、第１、第２の前記検出素子を対向配置するとともに、第１、第２の前記固定抵抗を対向配置したブリッジ回路を前記検出回路とした請求項１記載の荷重センサ。 A detection circuit which is connected to the detection element and detects strain of the strain generating body, and the first and second detection elements are disposed between two mounting portions provided on the strain generation body, and The first and second fixed resistors are disposed between the mounting portion and the end face of the strain generating body, the first and second detection elements are disposed opposite to each other, and the first and second fixed resistors are disposed. The load sensor according to claim 1, wherein a bridge circuit arranged oppositely is used as the detection circuit. 前記検出素子は歪抵抗とした請求項１記載の荷重センサ。 The load sensor according to claim 1, wherein the detection element is a strain resistance.
JP2006254320A 2006-09-20 2006-09-20 Load sensor Expired - Fee Related JP4935267B2 (en)

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KR101471200B1 (en) * 2008-07-10 2014-12-09 현대모비스 주식회사 Clamping force measurement sensor device for Electric Wedge Brake System
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