JPH0452537A - Torque detecting apparatus - Google Patents
Torque detecting apparatusInfo
- Publication number
- JPH0452537A JPH0452537A JP16315990A JP16315990A JPH0452537A JP H0452537 A JPH0452537 A JP H0452537A JP 16315990 A JP16315990 A JP 16315990A JP 16315990 A JP16315990 A JP 16315990A JP H0452537 A JPH0452537 A JP H0452537A
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- detected
- members
- magnetic
- torque
- 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
- 230000005540 biological transmission Effects 0.000 claims abstract description 36
- 238000001514 detection method Methods 0.000 claims description 44
- 229910000838 Al alloy Inorganic materials 0.000 abstract description 3
- 230000002411 adverse Effects 0.000 abstract 1
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 238000010285 flame spraying Methods 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000000696 magnetic material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
Landscapes
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、動力伝達軸の軸方向に離間した２つの部位の
回転位相差から軸トルクを検出するトルク検出装置に関
する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a torque detection device that detects shaft torque from a rotational phase difference between two parts of a power transmission shaft spaced apart in the axial direction.
従来から、エンジンや電動モータなどにより回転駆動さ
れる動力伝達軸の軸トルクを検出するトルク検出装置と
して、動力伝達軸の捩じれ角から軸トルクを検出するよ
うにしたものが知られている。2. Description of the Related Art Conventionally, as a torque detection device for detecting the shaft torque of a power transmission shaft rotationally driven by an engine, an electric motor, etc., there has been known a torque detection device that detects shaft torque from the torsion angle of the power transmission shaft.
通常、上記トルク検出装置では、動力伝達軸の軸方向に
離間した２つの部位に被検出部を形成し、これら被検出
部を夫々検出する１対のセンサを動力伝達軸の外側の固
定部材に被検出部と対向状に設け、両センサ出力に基い
て離間した２つの部位の回転位相差を求め、回転位相差
から動力伝達軸の捩じれ角を演算して軸トルクを求める
ように構成されている。Usually, in the above-mentioned torque detection device, detected parts are formed at two parts separated in the axial direction of the power transmission shaft, and a pair of sensors for detecting these detected parts are mounted on a fixed member outside the power transmission shaft. It is arranged to face the detected part, and is configured to determine the rotational phase difference between two separated parts based on the outputs of both sensors, and calculate the torsion angle of the power transmission shaft from the rotational phase difference to determine the shaft torque. There is.
一方、特開昭６４−２１２５５公報には、自動変速機の
入力軸の軸方向に離間した２つの部位に形状磁気異方性
を有する被検出部を形成し、この２つの部位に形成され
た被検出部を夫々検出する検出コイルを入力軸の外周側
の固定部材に固定し、雨検出コイルからの出力に基いて
入力軸の軸トルりを検出するトルク検出装置が記載され
ている。On the other hand, Japanese Patent Application Laid-Open No. 64-21255 discloses that detection portions having shape magnetic anisotropy are formed in two portions spaced apart in the axial direction of the input shaft of an automatic transmission. A torque detection device is described in which detection coils for detecting each detected portion are fixed to a fixing member on the outer peripheral side of an input shaft, and the shaft torque of the input shaft is detected based on the output from the rain detection coil.
上記従来及び公報のトルク検出装置では、動力伝達軸の
外周面に被検出部を形成するときに、相離間した１対の
被検出部を位相誤差のない状態に精密に形成するのが非
常に難しいという問題がある。In the above-mentioned conventional and published torque detection devices, when forming the detected part on the outer peripheral surface of the power transmission shaft, it is very difficult to precisely form a pair of separated detected parts without phase error. The problem is that it is difficult.
１対のセンサの組付は位相誤差は検出トルクの誤差を招
くので、１対のセンサを高精度に組付ける必要があるが
、１対の相離間した被検出部に対応するように１対のセ
ンサを固定部材の相離間した部位に高精度に組付けるこ
とが非常に難しいこと、自動変速機などの場合動力伝達
軸の外周側の極く限られた狭い範囲にしか固定部材が存
在しないので１対のセンサの軸方向離間距離を大きく設
定することが出来ず、軸トルクの検出精度高めることが
難しいこと、などの問題がある。When assembling a pair of sensors, it is necessary to assemble the pair of sensors with high precision because a phase error causes an error in the detected torque. It is extremely difficult to assemble the sensors with high precision to separate parts of the fixed member, and in the case of automatic transmissions, the fixed member only exists in a very limited area on the outer circumference of the power transmission shaft. Therefore, it is not possible to set a large distance apart in the axial direction between the pair of sensors, and there are problems such as that it is difficult to improve the detection accuracy of the shaft torque.
本発明の目的は、被検出部を容易に形成でき、センサな
どの検出手段の組付精度及び組付性を向上でき、軸トル
クの検出精度を向上し得るようなトルク検出装置を提供
することである。SUMMARY OF THE INVENTION An object of the present invention is to provide a torque detection device in which a detected part can be easily formed, the accuracy and ease of assembly of a detection means such as a sensor can be improved, and the detection accuracy of shaft torque can be improved. It is.
本発明に係るトルク検出装置は、動力伝達軸の軸方向に
離間した２つの部位の回転位相差から軸トルクを検出す
るトルク検出装置において、一端が上記各部位に夫々固
定され他端が動力伝達軸の外側の固定部材に対応する位
置まで夫々延長された１対の被検出側部材と、上記各被
検出側部材の他端部の外周部に形成された被検出部と、
上記固定部材に固定的に併設され上記１対の被検出部を
夫々検出する１対の検出手段とを備えたものである。The torque detection device according to the present invention is a torque detection device that detects shaft torque from the rotational phase difference between two parts separated in the axial direction of a power transmission shaft. a pair of detected side members each extending to a position corresponding to the fixed member on the outside of the shaft; a detected portion formed on the outer periphery of the other end of each of the detected side members;
The apparatus further includes a pair of detection means that are fixedly attached to the fixed member and detect the pair of detected parts, respectively.
本発明に係るトルク検出装置においては、１対の被検出
側部材の一端部が動力伝達軸の２つの部位に夫々固定さ
れ、また他端部が動力伝達軸の外側の固定部材に対応す
る位置まで夫々延長され、これら被検出側部材の他端部
の外周部に夫々形成された１対の被検出部を固定部材に
固定的に併設された１対の検出手段で夫々検出し、２つ
の部位の回転位相差から動力伝達軸の軸トルクが求めら
れる。In the torque detection device according to the present invention, one end of the pair of detected members is fixed to two parts of the power transmission shaft, and the other end is located at a position corresponding to the fixed member on the outside of the power transmission shaft. A pair of detection means fixedly attached to the fixed member detects a pair of detection parts formed on the outer periphery of the other end of the detection member, respectively, and detects the two detection parts. The shaft torque of the power transmission shaft is determined from the rotational phase difference between the parts.
上記のように、１対の被検出部を１対の被検出側部材に
形成するので、動力伝達軸の形状やサイズに関係なく比
較的高精度かつ容易に被検出部を形成出来る。また、被
検出側部材を非磁性材料で構成すれば非磁性化処理を施
すことなく被検出部を容易に形成することが出来る。As described above, since the pair of detected parts are formed on the pair of detected members, the detected parts can be formed easily and with relatively high precision regardless of the shape and size of the power transmission shaft. Further, if the detection side member is made of a non-magnetic material, the detection part can be easily formed without performing a non-magnetic treatment.
更に、固定部材に併設された１対の検出手段で、固定部
材に対応する位置まで延長された被検出側部材の被検出
部を検出し、１対の部位の回転位相差を検出するので、
検出手段を相離間した１対の部位に対向して配設する必
要がなく、１対の被検出部に対向させて配設すればよい
ので、検出手段の組付精度と組付性を向上させることが
出来る。Furthermore, the pair of detection means attached to the fixed member detects the detected part of the detected member extended to the position corresponding to the fixed member, and detects the rotational phase difference between the pair of parts.
There is no need for the detection means to be placed facing a pair of parts separated from each other, and it can be placed facing a pair of detected parts, improving the assembly accuracy and ease of assembly of the detection means. I can do it.
更に、自動変速機のように動力伝達軸の外側の極く限ら
れた狭い範囲にしか固定部材が存在しない場合にも、１
対の被検出側部材を長くすれば動力伝達軸の相離間した
１対の部位間の間隔を大きく設定できるので、軸トルク
の検出精度を向上させることが出来る。Furthermore, even in cases where the fixed member exists only in a very limited narrow area outside the power transmission shaft, such as in an automatic transmission, 1
By increasing the length of the pair of detected side members, the distance between the pair of separated parts of the power transmission shaft can be set larger, so that the detection accuracy of the shaft torque can be improved.
本発明に係るトルク検出装置によれば、上記〔作用〕の
項で詳述したように、動力伝達軸に夫々固定した１対の
被検出側部材に夫々被検出部を形成したことにより、動
力伝達軸の形状やサイズに関係なく被検出部を高精度に
かつ容易に形成できること、１対の検出手段の組付精度
及び組付性を向上し得ること、軸トルクの検出精度を向
上させることが出来ること、などの効果が得られる。According to the torque detection device according to the present invention, as described in detail in the [Operation] section above, by forming the detected portions on the pair of detected side members fixed to the power transmission shaft, respectively, the torque detecting device detects the power. To be able to easily form a detected part with high precision regardless of the shape and size of a transmission shaft, to be able to improve assembly accuracy and ease of assembly of a pair of detection means, and to improve shaft torque detection accuracy. Effects such as being able to do this can be obtained.
以下、本発明の実施例を図面に基いて説明する。 Embodiments of the present invention will be described below with reference to the drawings.
本実施例は、自動車用の自動変速機のタービン軸の軸ト
ルクを検出するトルク検出装置に本発明を適用した場合
のものである。This embodiment is a case where the present invention is applied to a torque detection device that detects the shaft torque of a turbine shaft of an automatic transmission for an automobile.
先ず、自動変速機１について簡単に説明すると、第１図
に示すように、エンジン（図示路）のクランク軸２と同
軸にタービン軸３が設けられ、タービン軸３にはトルク
コンバータ４とオイルポンプ５と多段変速機構６とが同
軸上にエンジン側から順に配置され、多段変速機構６の
下側には多段変速機構６を変速制御するための油圧コン
トロールバルブユニット７が設けられている。First, to briefly explain the automatic transmission 1, as shown in FIG. 1, a turbine shaft 3 is provided coaxially with a crankshaft 2 of an engine (path shown), and a torque converter 4 and an oil pump are connected to the turbine shaft 3. 5 and a multi-stage transmission mechanism 6 are arranged coaxially in order from the engine side, and a hydraulic control valve unit 7 for controlling the speed change of the multi-stage transmission mechanism 6 is provided below the multi-stage transmission mechanism 6.
上記トルクコンバータ４は、第２図に示すように、ポン
プ１０とタービン１１とステータ１２とを備え、ポンプ
１０はカバ一部材１３を介してクランク軸２の軸端に連
結されるとともにポンプハブ１４を介してオイルポンプ
５の駆動歯車１５に連結され、タービン１１はタービン
ハブ１６を介してタービン軸３に連結され、ステータ１
２はワンウェイクラッチ１７を介してオイルポンプ５の
ステータ固定軸部２２に接続され、クランク軸２の回転
力は、ポンプ１０とタービン１１との間を循環するオイ
ルを介してポンプ１０からタービン１１に伝達され、タ
ービンハブ１６を介してタービン軸３に伝達される。The torque converter 4 includes a pump 10, a turbine 11, and a stator 12, as shown in FIG. The turbine 11 is connected to the turbine shaft 3 via the turbine hub 16, and the stator 1 is connected to the drive gear 15 of the oil pump 5 through the
2 is connected to the stator fixed shaft portion 22 of the oil pump 5 via a one-way clutch 17, and the rotational force of the crankshaft 2 is transferred from the pump 10 to the turbine 11 via the oil circulating between the pump 10 and the turbine 11. and is transmitted to the turbine shaft 3 via the turbine hub 16.
上記オイルポンプ５は、自動変速機１のケーシング８に
固着されたポンプハウジング２０とポンプカバー２１内
に組込まれ、ポンプカバー２１にはエンジン側へ延びワ
ンウェイクラッチ１７に接続された略円筒状のステータ
固定軸部２２と、多段変速機構６側へ延びる略円筒状の
固定軸部２３とが形成され、タービン軸３は固定軸部２
２・２３に回転自在に挿通されている。The oil pump 5 is assembled into a pump housing 20 and a pump cover 21 that are fixed to the casing 8 of the automatic transmission 1, and the pump cover 21 has a substantially cylindrical stator that extends toward the engine and is connected to the one-way clutch 17. A fixed shaft portion 22 and a substantially cylindrical fixed shaft portion 23 extending toward the multi-stage transmission mechanism 6 are formed, and the turbine shaft 3 is connected to the fixed shaft portion 2.
2 and 23 so as to be rotatable.
上記油圧コントロールバルブユニット７は、多段変速機
構６等を切換制御するコントロールバルブ機構と自動変
速機１内のライン圧（作動油の油圧）を設定するライン
圧設定機構とを備え、この油圧コントロールバルブユニ
ット７はコントロールユニット３０で制御される。The hydraulic control valve unit 7 includes a control valve mechanism that switches and controls the multi-stage transmission mechanism 6, etc., and a line pressure setting mechanism that sets the line pressure (hydraulic oil pressure) in the automatic transmission 1. Unit 7 is controlled by control unit 30.
上記コントロールユニッ１−３０は、所定の特性で変速
制御を実行する為の制御プログラムを格納したマイクロ
コンピュータを備え、エンジンのスロットル開度センサ
３１とアイドルスイッチ３２と車速センサ３３と運転席
の操作レバーの設定状態を検出する複数のスイッチ３４
と後述のトルク検出装置などからの種々の信号がコント
ロールユニット３０へ供給され、これらの信号に基いて
コントロールユニット３０は、コントロールバルブ機構
とライン圧設定機構を制御し、自動車の走行状態に応じ
て自動的に変速段を切換えるとともにライン圧を設定す
る。尚、上記油圧コントロールバルブユニット７は既存
周知のものであり、変速段の切換え及びライン圧の設定
は、−船釣な自動変速制御により行われる。The control unit 1-30 is equipped with a microcomputer storing a control program for executing speed change control with predetermined characteristics, and includes an engine throttle opening sensor 31, an idle switch 32, a vehicle speed sensor 33, and a driver's seat control lever. A plurality of switches 34 detecting the setting state of
Various signals from a torque detection device, which will be described later, etc., are supplied to the control unit 30, and based on these signals, the control unit 30 controls the control valve mechanism and line pressure setting mechanism, depending on the driving state of the vehicle. Automatically changes gears and sets line pressure. The hydraulic control valve unit 7 is a well-known type, and the gear shift and line pressure setting are performed by automatic gear shift control.
トルク検出装置は、ライン圧設定制御で用いられるター
ビン軸３の軸トルクを検出するためのもので、第２図・
第３図に示すように、タービン軸３のオイルポンプ５に
対応する位置にはアルミニウム合金製の前後１対の円筒
部材４０・４１が僅かに隙間をあけて直列状に外遊嵌さ
れ、円筒部材４０・４１の相対向しない基端部の固定部
４０ａ・４１ａはタービン軸３の軸方向に相離間した１
対の固定部位３ａ・３ｂにピン部材４２を介して夫々固
定され、百円筒部材４０・４１の先端部はポンプカバー
２１のカバー壁部２４に対応する位置まで延長され、円
筒部材４０・４１の固定部４０ａ・４１ａ以外の部分と
タービン軸３間には僅かな隙間が形成され、円筒部材４
０・４１はタービン軸３と一体的に回転する。The torque detection device is for detecting the shaft torque of the turbine shaft 3 used in line pressure setting control, and is shown in Fig. 2.
As shown in FIG. 3, a pair of front and rear cylindrical members 40 and 41 made of aluminum alloy are loosely fitted in series with a slight gap at a position corresponding to the oil pump 5 of the turbine shaft 3. The fixed parts 40a and 41a at the base end portions 40 and 41 that do not face each other are fixed parts 40a and 41a that are separated from each other in the axial direction of the turbine shaft 3.
The cylindrical members 40 and 41 are fixed to the pair of fixing parts 3a and 3b via pin members 42, and the tips of the cylindrical members 40 and 41 are extended to positions corresponding to the cover wall 24 of the pump cover 21. A slight gap is formed between the parts other than the fixed parts 40a and 41a and the turbine shaft 3, and the cylindrical member 4
0.41 rotates integrally with the turbine shaft 3.
円筒部材４０・４１の相対向する先端部の外周部には所
定幅の略円筒状の磁気記録層４３・４４が溶射にて形成
され、カバー壁部２４の内端部にはホルダ部材４５が固
着され、ホルダ部材４５には磁気記録層４３・４４に夫
々対向する前後１対の磁気ヘッド４６・４７が装着され
、磁気ヘッド４６・４７はコントロールユニット３０に
夫々接続されている。尚、上記磁気ヘッド４６・４７は
、コントロールユニット３２からの電気信号で磁気記録
層４３・４４に所定の磁気パターンを書込み可能で、且
つ磁気記録層４３・４４に書込まれた磁気パターンに対
応する電気信号をコントロールユニット３０に出力可能
なものである。Approximately cylindrical magnetic recording layers 43 and 44 having a predetermined width are formed by thermal spraying on the outer periphery of the opposing tips of the cylindrical members 40 and 41, and a holder member 45 is formed on the inner end of the cover wall 24. A pair of front and rear magnetic heads 46 and 47 facing the magnetic recording layers 43 and 44, respectively, are attached to the holder member 45, and the magnetic heads 46 and 47 are connected to the control unit 30, respectively. The magnetic heads 46 and 47 are capable of writing predetermined magnetic patterns in the magnetic recording layers 43 and 44 using electric signals from the control unit 32, and correspond to the magnetic patterns written in the magnetic recording layers 43 and 44. It is possible to output an electrical signal to the control unit 30.
上記トルク検出制御について簡単に説明する。The above torque detection control will be briefly explained.
上記コントロールユニット３０のマイクロコンピュータ
にはトルク検出制御の制御プログラムが予め入力格納さ
れており、例えば運転開始時など、アイドルスイッチ３
２及びスイッチ３４のうちのニュートラルスイッチがＯ
Ｎ状態のとき、つまりアイドル運転中で且つタービン軸
３に負荷が作用していないときには、コントロールユニ
ット３０から磁気ヘッド４６・４７へ所定周波数、のデ
ジタル信号が出力され、第４図に示すように、磁気記録
層４３・４４に同一周波数で且つ同一位相のデジタル信
号に対応する磁気パターンが書き込まれる。A control program for torque detection control is input and stored in advance in the microcomputer of the control unit 30, and for example, when starting operation, the idle switch 3
2 and the neutral switch of switch 34 is O.
When in the N state, that is, during idle operation and when no load is acting on the turbine shaft 3, a digital signal of a predetermined frequency is output from the control unit 30 to the magnetic heads 46 and 47, as shown in FIG. , magnetic patterns corresponding to digital signals having the same frequency and the same phase are written on the magnetic recording layers 43 and 44.
次に、磁気記録層４３・４４への書込み完了後、磁気記
録層４３・４４に記憶された磁気パターンを随時磁気ヘ
ッド４６・４７で読込み、磁気ヘッド４６・４７から出
力されるデジタル信号の位相差から第１固定部位３ａと
第２固定部位３ｂ間のタービン軸３の捩じれ角が演算さ
れ、捩じれ角からタービン軸３の軸トルクを求めてライ
ン圧設定制御へ出力する。Next, after writing to the magnetic recording layers 43 and 44 is completed, the magnetic patterns stored in the magnetic recording layers 43 and 44 are read by the magnetic heads 46 and 47 at any time, and the positions of the digital signals output from the magnetic heads 46 and 47 are read. The torsion angle of the turbine shaft 3 between the first fixed portion 3a and the second fixed portion 3b is calculated from the phase difference, and the axial torque of the turbine shaft 3 is determined from the torsion angle and output to line pressure setting control.
上記軸トルクの演算について、第４図・第５図を参照し
ながら説明する。The calculation of the shaft torque will be explained with reference to FIGS. 4 and 5.
トルク負荷の開放時におけるタービン軸３の回転数Ｎｏ
、磁気ヘッド４６・４７の書込み周波数ｆＯ（第４図参
照）、磁気記録層４３・４４に記憶される磁気点列の数
をＺとすると、（１）式の関係が成立する。Rotation speed No. of turbine shaft 3 when torque load is released
, the write frequency fO of the magnetic heads 46 and 47 (see FIG. 4), and the number of magnetic dot sequences stored in the magnetic recording layers 43 and 44 as Z, the relationship of equation (1) holds true.
ｆｏ””ＺＮｏ ・・・（１）
次に、タービン軸３にトルクが負荷されると、タービン
軸３に捩じれが生し、第５図に示すように、磁気ヘッド
４６・４７から出力されるデジタル信号に第１固定部位
３ａ及び第２固定部位３ｂ間のタービン軸３の捩じれ角
θに相当する位相差Δｔが発生する。ここで、タービン
軸３０回転数をＮ、［気ヘッド４６・４７から得られる
デジタル信号の周波数ｆとして、捩じれ角θと位相差Δ
ｔには（２）式の関係が成立する。fo""ZNo...(1) Next, when torque is applied to the turbine shaft 3, the turbine shaft 3 is twisted, and as shown in FIG. 5, output is generated from the magnetic heads 46 and 47. A phase difference Δt corresponding to the torsion angle θ of the turbine shaft 3 between the first fixed portion 3a and the second fixed portion 3b is generated in the digital signal. Here, the rotation speed of the turbine shaft 30 is N, the frequency f of the digital signal obtained from the air heads 46 and 47, the torsion angle θ and the phase difference Δ
The relationship of equation (2) holds true for t.
θ＝２πＮΔｔ
＝２π（ｆ／Ｚ）Δｔ
＝２π（ＮＯ／ｆＤ ）ｆΔｔ・・・（２）但し、（１
）式同様、ｆ＝ＮＺの関係を用いた。θ=2πNΔt =2π(f/Z)Δt =2π(NO/fD)fΔt...(2) However, (1
), the relationship f=NZ was used.
一方、タービン軸３に負荷されたトルクをＴとして、ト
ルクＴと捩じれ角θとの関係については（３）式に示す
通りである。On the other hand, assuming that the torque loaded on the turbine shaft 3 is T, the relationship between the torque T and the torsion angle θ is as shown in equation (3).
Ｔ＝πＧｄ’ θ／３２Ｌ・・・（３）但し、Ｇはター
ビン軸３の横弾性係数、ｄは第１固定部位３ａ及び第２
固定部位３ｂ間のタービン軸３の直径、Ｌは第１固定部
位３ａ及び第２固定部位３ｂ間の距離である。T=πGd' θ/32L...(3) However, G is the transverse elastic modulus of the turbine shaft 3, and d is the first fixed part 3a and the second
The diameter of the turbine shaft 3 between the fixed parts 3b, L is the distance between the first fixed part 3a and the second fixed part 3b.
次に、（２）式を（３）式へ代入すると、（４）式を得
ることが出来る。この式は、トルクＴと磁気パターンの
書込み及び読込みの諸変数との関係を示す式となる。Next, by substituting equation (2) into equation (3), equation (4) can be obtained. This equation represents the relationship between the torque T and various variables for writing and reading magnetic patterns.
Ｔ＝π” Ｇｄ’ （Ｎｏ ／ｆｏ ）ｆΔｔ／１６
Ｌ・・・（４）
次に、上記トルク検出装置の作用について説明する。T=π” Gd' (No/fo)fΔt/16
L...(4) Next, the operation of the torque detection device will be explained.
自動車の自動変速機１のように、広範囲のトルクを長時
間に亙って断続的に負荷させるシステムでは、タービン
軸３に疲労が蓄積して無負荷状態においても捩じれが残
留したり、走行時の振動により磁気ヘッド４６・４７の
取付は位置に経年変化による位置ズレが発生する。In systems such as automatic transmissions 1 of automobiles, where a wide range of torque is applied intermittently over a long period of time, fatigue accumulates on the turbine shaft 3, resulting in residual torsion even in no-load conditions, or distortion during driving. Due to vibrations, the mounting positions of the magnetic heads 46 and 47 will shift due to aging.
上記トルク検出装置では、自動車の運転開始時或いは運
転中随時磁気記録層４３・４４に新たな磁気パターンを
書き込むことが出来るので、タービン軸３に残留した捩
じれや磁気ヘッド４６・４７の位置ズレに影響されるこ
となく精度良くタービン軸３の軸トルクを演算出来る。In the above-mentioned torque detection device, a new magnetic pattern can be written in the magnetic recording layers 43 and 44 at the start of operation of the automobile or at any time during operation. The shaft torque of the turbine shaft 3 can be calculated with high accuracy without being influenced.
上記磁気記録層４３・４４はその磁気特性を良くするた
めアルミニウム合金製の部材に対して磁性体を溶射して
形成することになるが、円筒部材４０・４１がアルミニ
ウム合金製なので、直接的に磁性体を溶射することが出
来、しかも円筒部材４０・４１はタービン軸３よりも格
段に小型軽量なものなので、磁気記録層４３・４４を簡
単に形成することが出来る。The magnetic recording layers 43 and 44 are formed by thermally spraying a magnetic material onto aluminum alloy members in order to improve their magnetic properties. Since the magnetic material can be thermally sprayed and the cylindrical members 40 and 41 are much smaller and lighter than the turbine shaft 3, the magnetic recording layers 43 and 44 can be easily formed.
更に、各固定部位３ａ・３ｂと一体的に回転する円筒部
材４０・４１をカバー壁部２４に対応する位置まで延長
し、円筒部材４ｏ・４１の先端部に磁気記録層４３・４
４を形成しであるので、磁気ヘッド４６・４７をホルダ
部材４５に二律的に組付けることが出来、磁気ヘッド４
６・４７の組付精度及び組付性を向上出来るとともに、
両日筒部材４０・４１を軸方向に長くしてその固定部４
０ａ・４１ａ間の寸法を大きく設定することにょリ、タ
ービン軸３の軸トルクの検出精度を容易に向上出来る。Furthermore, the cylindrical members 40 and 41 that rotate integrally with the fixing parts 3a and 3b are extended to positions corresponding to the cover wall part 24, and magnetic recording layers 43 and 4 are provided at the tips of the cylindrical members 4o and 41, respectively.
4, the magnetic heads 46 and 47 can be assembled to the holder member 45 uniformly, and the magnetic heads 4
As well as being able to improve the assembly accuracy and ease of assembly of 6.47,
Both cylinder members 40 and 41 are lengthened in the axial direction and their fixing portions 4
By setting the dimension between 0a and 41a large, the detection accuracy of the shaft torque of the turbine shaft 3 can be easily improved.
以上のように、タービン軸３の軸トルクを直接的に精度
良く検出出来ること、磁気記録層４３・４４の形成作業
を簡単化して生産性を向上出来ること、磁気ヘッド４６
・４７の組付精度・組付性を向上出来ること、軸トルク
の検出精度を向上できること、などの効果が得られる。As described above, the axial torque of the turbine shaft 3 can be directly detected with high precision, the formation work of the magnetic recording layers 43 and 44 can be simplified and productivity can be improved, and the magnetic head 46 can be easily detected.
・Effects such as being able to improve the assembly accuracy and ease of assembly of the 47, and being able to improve the detection accuracy of shaft torque can be obtained.
尚、上記磁気ヘッド４６・４７の取付位置が円筒部材４
０・４１よりも前側或いは後側にしか設けることができ
ない場合には、両回筒部材４０・４１を所定距離ラップ
させ、磁気記録層４３・４４を磁気ヘッド４６・４７に
夫々対向させてもよい。Note that the mounting positions of the magnetic heads 46 and 47 are the cylindrical member 4.
If it is possible to provide only the front side or the rear side of the magnetic recording layers 43 and 44, the magnetic recording layers 43 and 44 may be arranged to face the magnetic heads 46 and 47, respectively, by wrapping the cylinder members 40 and 41 by a predetermined distance. good.
尚、本実施例は、磁気記録層４３・４４と磁気ヘッド４
６・４７とを備えたトルク検出装置に本発明を適用した
が、複数のスリットや突部を磁気記録層４３・４４に対
応する位置に形成し、このスリットや突部を検出する１
対のセンサを設け、各固定部位３ａ・３ｂの回転位相差
を検出するようにしてもよい。In addition, in this embodiment, the magnetic recording layers 43 and 44 and the magnetic head 4
Although the present invention was applied to a torque detection device equipped with 6 and 47, a plurality of slits and protrusions are formed at positions corresponding to the magnetic recording layers 43 and 44, and the slits and protrusions are detected.
A pair of sensors may be provided to detect the rotational phase difference between the fixed portions 3a and 3b.
尚、本実施例では、自動車の自動変速機１に本発明を適
用したが、工作機械などの各種機械装置に対しても勿論
適用することが出来る。In this embodiment, the present invention is applied to the automatic transmission 1 of an automobile, but it can of course be applied to various mechanical devices such as machine tools.
図面は本発明の実施例を示すもので、第１図は自動変速
機の側面図、第２図は自動変速機の要部縦断面図、第３
図はトルク検出装置の縦断面図、第４図は磁気記録層に
書込まれるデジタル信号の説明図、第５図は磁気記録層
から読出されるデジタル信号の説明図である。
３・・タービン軸、 ３ａ・・第１固定部位、３ｂ・・
第２固定部位、 ２４・・カバー壁部、４０・４１・・
円筒部材、 ４０ａ・４１ａ・・固定部、 ４３・４４
・・磁気記録層、 ４６・４７・・磁気ヘッド。The drawings show an embodiment of the present invention, and FIG. 1 is a side view of an automatic transmission, FIG. 2 is a vertical sectional view of main parts of the automatic transmission, and FIG.
FIG. 4 is a longitudinal sectional view of the torque detection device, FIG. 4 is an explanatory diagram of digital signals written in the magnetic recording layer, and FIG. 5 is an explanatory diagram of digital signals read from the magnetic recording layer. 3...Turbine shaft, 3a...First fixing part, 3b...
Second fixing part, 24...Cover wall part, 40, 41...
Cylindrical member, 40a, 41a... fixed part, 43, 44
...Magnetic recording layer, 46,47...Magnetic head.
Claims (1)
位相差から軸トルクを検出するトルク検出装置において
、 一端が上記各部位に夫々固定され他端が動力伝達軸の外
側の固定部材に対応する位置まで夫々延長された１対の
被検出側部材と、 上記各被検出側部材の他端部の外周部に形成された被検
出部と、 上記固定部材に固定的に併設され上記１対の被検出部を
夫々検出する１対の検出手段とを備えたことを特徴とす
るトルク検出装置。(1) In a torque detection device that detects shaft torque from the rotational phase difference between two parts separated in the axial direction of the power transmission shaft, one end is fixed to each of the above parts, and the other end is a fixed member on the outside of the power transmission shaft. a pair of detected side members each extending to a position corresponding to the detected side members; a detected portion formed on the outer periphery of the other end of each of the detected side members; 1. A torque detection device comprising: a pair of detection means for respectively detecting a pair of detected portions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16315990A JPH0452537A (en) | 1990-06-20 | 1990-06-20 | Torque detecting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16315990A JPH0452537A (en) | 1990-06-20 | 1990-06-20 | Torque detecting apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0452537A true JPH0452537A (en) | 1992-02-20 |
Family
ID=15768354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16315990A Pending JPH0452537A (en) | 1990-06-20 | 1990-06-20 | Torque detecting apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0452537A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8844379B2 (en) | 2011-05-24 | 2014-09-30 | Ford Global Technologies, Llc | Transmissions with electronics interface assembly for torque sensor |
| US9285282B2 (en) | 2013-02-20 | 2016-03-15 | Ford Global Technologies, Llc | Magnetic sensor packaging for transmissions |
| US9383273B2 (en) | 2011-05-24 | 2016-07-05 | Ford Global Technologies, Llc | Magnetic torque sensor packaging for automatic transmissions |
-
1990
- 1990-06-20 JP JP16315990A patent/JPH0452537A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8844379B2 (en) | 2011-05-24 | 2014-09-30 | Ford Global Technologies, Llc | Transmissions with electronics interface assembly for torque sensor |
| US9383273B2 (en) | 2011-05-24 | 2016-07-05 | Ford Global Technologies, Llc | Magnetic torque sensor packaging for automatic transmissions |
| US9631722B2 (en) | 2011-05-24 | 2017-04-25 | Ford Global Technologies, Llc | Transmissions with torque and/or speed sensor arrangements |
| US9285282B2 (en) | 2013-02-20 | 2016-03-15 | Ford Global Technologies, Llc | Magnetic sensor packaging for transmissions |
| US9618407B2 (en) | 2013-02-20 | 2017-04-11 | Ford Global Technologies, Llc | Magnetic sensor packaging for transmissions |
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