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1. 发明专利

DE4214368C2 未知
公开(公告)号：DE4214368C2
公开(公告)日：1996-08-29
申请号：DE4214368
申请日：1992-04-30
申请人： NISSAN MOTOR , DAIDO STEEL CO LTD
发明人： AOKI HIROYUKI , SHIMADA MUNEKATSU , SHIBATA ITARU , SHINOHARA MIKIYA , MIZUNO MASASHI , YAHAGI SHINICHIRO , NAGATA MASARU , MATSUI NOBUYUKI , HANASHIMA SHIGEO
IPC分类号： G01L3/10 , G01L1/12
摘要： To obtain stable linear torque-output characteristics over a wide torque range in a magnetostrictive torque detecting apparatus having a shaft to be measured, an exciting coil for magnetically exciting the shaft, and a detecting coil for detecting magnetostrictive components generated in the shaft distorted by a torque, the shaft is particularly composed of a substrate shaft portion made of a high yield point material and a shape anisotropic layer portion made of a high magnetostrictive material metallographically welded on an outer surface of the substrate shaft. The welded shape anisotropic layer portion is formed with two symmetrical groups of concave/convex portions each arranged at regular angular intervals on the outer circumferential surface thereof at an inclination angle with respect to the axial direction of the shaft.

2. 发明专利

DE4214368A1 未知
公开(公告)号：DE4214368A1
公开(公告)日：1992-11-05
申请号：DE4214368
申请日：1992-04-30
申请人： NISSAN MOTOR , DAIDO STEEL CO LTD
发明人： AOKI HIROYUKI , SHIMADA MUNEKATSU , SHIBATA ITARU , SHINOHARA MIKIYA , MIZUNO MASASHI , YAHAGI SHINICHIRO , NAGATA MASARU , MATSUI NOBUYUKI , HANASHIMA SHIGEO
IPC分类号： G01L3/10
摘要： To obtain stable linear torque-output characteristics over a wide torque range in a magnetostrictive torque detecting apparatus having a shaft to be measured, an exciting coil for magnetically exciting the shaft, and a detecting coil for detecting magnetostrictive components generated in the shaft distorted by a torque, the shaft is particularly composed of a substrate shaft portion made of a high yield point material and a shape anisotropic layer portion made of a high magnetostrictive material metallographically welded on an outer surface of the substrate shaft. The welded shape anisotropic layer portion is formed with two symmetrical groups of concave/convex portions each arranged at regular angular intervals on the outer circumferential surface thereof at an inclination angle with respect to the axial direction of the shaft.

3. 发明专利

JPH05322673A MAGNETOSTRICTION MEASURING MEMBER 失效
公开(公告)号：JPH05322673A
公开(公告)日：1993-12-07
申请号：JP12490092
申请日：1992-05-18
申请人： NISSAN MOTOR , DAIDO STEEL CO LTD
发明人： SHINOHARA MIKIYA , SHIBATA ITARU , SHIMADA MUNEKATSU , NAGATA MASA , HANASHIMA SHIGEO
IPC分类号： G01L3/10
摘要： PURPOSE:To obtain a magnetostriction measuring member which has large accepting torque and shows high sensitivity to the magnetostriction by providing a specific band-shaped thick layer in the outer periphery of a steel shaft material made of carbon steel or alloy steel. CONSTITUTION:The magnetostriction measuring member uses a steel shaft material made of carbon steel or alloy steel. For the carbon steel, SC material, S-CK material, etc., is employed. For the alloy steel, e.g. SCr material, SMn material or the like which is a kind of steel for mechanical structure is used. A band-shaped thick layer formed of Fe-Al alloy containing 1-50wt.% Al is provided on the surface of the shaft material. If the content of Al is too small, the hysteresis is greatly varied when the torque is detected. Therefore, the content, of Al is set to be not smaller than 5wt.% Moreover, if Al is contained too much, the sensitivity is lowered, and therefore the content should be 15wt.% or lower so as to increase the detecting sensitivity. When the band-shaped thick layer is too thick, it cracks, and therefore, the band-shaped layer is 3mm thick or thinner. Further, if the layer is too hard, it also generates cracks, and therefore the layer is adapted to have Vickers hardness Hv=420 or smaller.

4. 发明专利

JPH05215619A TORQUE DETECTOR 失效
公开(公告)号：JPH05215619A
公开(公告)日：1993-08-24
申请号：JP1785992
申请日：1992-02-03
申请人： NISSAN MOTOR , DAIDO STEEL CO LTD
发明人： AOKI HIROYUKI , SHINOHARA MIKIYA , SHIBATA ITARU , SHIMADA MUNEKATSU , NAGATA MASA
IPC分类号： G01L3/10
摘要： PURPOSE:To protect high magnetostrictive material from cracking when a shaft to be measured is subjected to tempering, e.g. quenching, in order to elevate the yield point. CONSTITUTION:The torque detector 1 comprises a shaft 2 to be measured, exciting means, i.e., coils 5a, 5b, for forming a magnetic circuit partially passing through the shaft 2, and detecting means, i.e., coils 5a, 5b, for detecting magnetostrictive component of the shaft 2. Such material as exhibiting high yield point through heat treatment accompanied with abrupt temperature change is employed in the body 2a of the shaft 2 having surface united metallographically with high magnetostrictive material 2b. Recessed parts 3a, 3b and/or protruding parts 4a, 4b making a predetermined angle with respect to the axis are formed at least at the high magnetostrictive material 2b part of the shaft 2 with the recessed parts 3a, 3b and/or the protruding parts 4a, 4b being inclined at the long end part and/or the side end part thereof.

5. 发明专利

JPH05215618A TORQUE DETECTOR 失效
公开(公告)号：JPH05215618A
公开(公告)日：1993-08-24
申请号：JP1785292
申请日：1992-02-03
申请人： NISSAN MOTOR , DAIDO STEEL CO LTD
发明人： SHINOHARA MIKIYA , AOKI HIROYUKI , SHIBATA ITARU , SHIMADA MUNEKATSU , NAGATA MASA
IPC分类号： G01L3/10
摘要： PURPOSE:To prevent high magnetostrictive material from cracking when a high magnetostrictive material is united metallographically on the surface of a shaft body to be measured or when the shaft body is subjected to tempering, e.g. quenching, in order to elevate the yield point. CONSTITUTION:The torque detector 1 comprises a shaft 2 to be measured, exciting means, i.e., coils 6a, 6b, for forming a magnetic circuit partially passing through the shaft 2, and detecting means, i.e., coils 6a, 6b, for detecting magnetostrictive components of the shaft 2. The shaft 2 has a body 2a made of such material as exhibiting high yield point through tempering and a high magnetostrictive material 2b is united metallographically on the surface of the body 2a. Uniting interface of the body 2a and the high magnetostrictive material 2b on the axial cross-section of the shaft 2 is formed while inclining at least the opposite ends 2c, 2d in the axial direction and magnetically anisotropic profile parts 5a, 5b are provided at least at the high magnetostrictive material 2b part of the shaft 2.

6. 发明专利

JPH05215620A TORQUE DETECTOR 失效
公开(公告)号：JPH05215620A
公开(公告)日：1993-08-24
申请号：JP1786992
申请日：1992-02-03
申请人： NISSAN MOTOR , DAIDO STEEL CO LTD
发明人： SHINOHARA MIKIYA , AOKI HIROYUKI , SHIBATA ITARU , SHIMADA MUNEKATSU , NAGATA MASA
IPC分类号： G01L3/10
摘要： PURPOSE:To suppress error in torque detection output when a shaft to be measured is dislocated in the axial direction without requiring positional adjustment of detecting means comprising a coil for every shaft to be measured. CONSTITUTION:The torque detector 1 comprises a shaft 2 to be measured, exciting coils 6a, 6b establishing a magnetic circuit partially passing through the shaft 2, and coils 6a, 6b for detecting magnetostrictive components of the shaft 2. Such material as having high yield point is employed in the body 2a of the shaft 2 having surface united metallographically with high magnetostrictive material 2b. The shaft 2 is split, at the high magnetostrictive material 2b part, into two sections in the axial direction 2A and magnetically anisotropic profile parts 5a, 5b are formed at the high magnetostrictive material 2b part wherein the detecting coils 6a, 6b are disposed at positions close to the anisotropic parts 5a, 5b where the inductance L is maximized.

7. 发明专利

JPH04329326A TORQUE DETECTION APPARATUS 失效
公开(公告)号：JPH04329326A
公开(公告)日：1992-11-18
申请号：JP9902091
申请日：1991-04-30
申请人： NISSAN MOTOR , DAIDO STEEL CO LTD
发明人： AOKI HIROYUKI , SHIBATA ITARU , SHINOHARA MIKIYA , SHIMADA MUNEKATSU , MIZUNO MASASHI , YAHAGI SHINICHIRO , NAGATA MASA , MATSUI NOBUYUKI
IPC分类号： G01L3/10
摘要： PURPOSE:To obtain torque output characteristics stabilized from a low torque to a high torque and to improve manufacture of shape magnetic anisotropy parts. CONSTITUTION:A surface part of a measured axis 2 is formed by melting a magnetostrictive material 2b made of Fe-Al alloy into a single body. On the surface part of the measured axis 2, a smoothly curved surface is formed by plastic processing and shape magnetic anisotropy parts 5a, 5b composed of recess shaped parts 3a, 3b and projection shaped parts 4a, 4b are provided with a fixed angle to the axial direction of the measured axis 2.

8. 发明专利

JPH06160209A TORQUE DETECTOR 失效
公开(公告)号：JPH06160209A
公开(公告)日：1994-06-07
申请号：JP31519992
申请日：1992-11-25
申请人： NISSAN MOTOR , DAIDO STEEL CO LTD
发明人： SHIBATA ITARU , SHINOHARA MIKIYA , SHIMADA MUNEKATSU , MIZUNO MASASHI , MATSUI NOBUYUKI
IPC分类号： G01L3/10
摘要： PURPOSE:To improve torque detection output without any concentration of stress due to excessive torsion torque at a magnetic shape anisotropic part. CONSTITUTION:In the title torque detector 1 for detecting the torque applied to a shaft 2 by providing magnetic shape anisotropic parts 5a and 5b with a plurality of groove parts 3a and 3b forming a partial helical shape and a plurality of crest parts 4a and 4b formed between the grooves 3a and 3b on the surface of the shaft 2 and detecting the change in permeability generated at the magnetic shape anisotropic parts 5a and 5b due to the magnetostriction operation when torque is applied to the shaft 2, the total of the width in peripheral direction of the shaft 2 at the crest parts 4a and 4b of the magnetic shape anisotropic parts 5a and 5b is set to a ratio of 0.6-0.7 for the length in peripheral direction of the shaft 2.

9. 发明专利

JPH0572064A SHAFT TO BE MEASURED AND MANUFACTURE OF TORQUE DETECTING APPARATUS AND SHAFT TO BE MEASURED 失效
公开(公告)号：JPH0572064A
公开(公告)日：1993-03-23
申请号：JP2833992
申请日：1992-02-14
申请人： NISSAN MOTOR , DAIDO STEEL CO LTD
发明人： AOKI HIROYUKI , SHINOHARA MIKIYA , SHIBATA ITARU , SHIMADA MUNEKATSU , NAGATA MASA , HANASHIMA SHIGEO
IPC分类号： B23K9/04 , B23K10/02 , B23K15/00 , B23K26/34 , G01L3/10
摘要： PURPOSE:To make it possible to detect torque stably from low torque to high torque by exposing a substrate-material part at the bottom part of each recess part formed at a high magnetostriction part, expanding the range of substrate materials which can be utilized, and positively providing a high yield point in the substrate material. CONSTITUTION:In a shaft to be measured 2, a material, which has a high yield point by surface hardening, is used as a substrate 2a. A high magnetostriction material 2b is fused on the surface as a metal texture. A plurality of recess parts 3a and 3b are formed in the circumferential directions at the symmetrical left and right sides at specified angles with respect to the direction of the axial center of the shaft 2 at the part of the material 2b. Protruding parts 4a and 4b are relatively formed in this way, and a magnetic anisotropy part in shape is provided. Coils 5a and 5b are arranged at the outer surface parts of the shaft 2 so as to face the magnetic different- direction part. At this time, the recess parts 3a and 3b occupy the broad range of the part of the material 2b. The substrate material is exposed at the bottom part in this constitution. Thus, the range of the substrate material, which can be utilized as the shaft to be measured, can be expanded, and the stable torque detection can be performed.

10. 发明专利

JPH04329325A TORQUE DETECTION APPARATUS 失效
公开(公告)号：JPH04329325A
公开(公告)日：1992-11-18
申请号：JP9900091
申请日：1991-04-30
申请人： NISSAN MOTOR , DAIDO STEEL CO LTD
发明人： AOKI HIROYUKI , SHIMADA MUNEKATSU , SHIBATA ITARU , SHINOHARA MIKIYA , MIZUNO MASASHI , YAHAGI SHINICHIRO , NAGATA MASA , MATSUI NOBUYUKI
IPC分类号： G01L3/10
摘要： PURPOSE:To enable stable detection of torque from a low torque region to a high torque region. CONSTITUTION:A torque detection apparatus 1 is composed of a measured axis 2, excitation means 5a, 5b which forms a magnetic circuit in which a measured axis 2 is as a part of the magnetic circuit, and detection means 5a, 5b for detecting magnetic strain components of the measured axis 2. In the measured axis 2, a base body 2a is made of a material having a high yielding point, and a high magnetostrictive material 2b is melted into the metallic organization on its surface. At least in the part of high magnetostrictive material 2b of the measured axis 2, recess shaped part 3a, 3b and/or projection shaped parts 4a, 4b are formed with a fixed angle to the axial direction of the measured axis 2.

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