JPH0447638U - - Google Patents

Description

[Brief explanation of the drawing]

Figures 1 to 6 relate to one specific example of the torque transducer of the present invention, of which Figure 1 is a vertical cross-sectional view of the central part, Figure 2 is an assembled view of the whole,
Figure 3 is a partially assembled diagram, Figure 4 is a partially completed diagram, and Figure 5 is a partially assembled diagram.
The figure is an overall plan view, and FIG. 6 is a circuit diagram. 7th
8 and 8 are sectional views of main parts of different specific examples, respectively. FIG. 9 is a longitudinal cross-sectional view of a central portion of a conventional torque transducer, and FIG. 10 is a circuit diagram. In the drawing, 10 is a rotating shaft, 12 and 14 are annular bands, 26 is a fixed housing member, 30 and 32 are ball bearings, 44 is an electromagnetic shielding case, 60 and 61 are excitation coils, 62 and 63 are sensing coils, and 64 is a It is a holding member.

Amendment September 27, 1999 The title of the invention is amended as follows. Title of the invention Torque transducer The scope of the utility model registration claims and the brief description of the drawings are amended as follows.

[Claims for Utility Model Registration] A ferromagnetic magnetostrictive means that is provided on a rotating shaft and changes magnetic permeability in response to torque acting on the rotating shaft, and a magnetic field applying coil means that applies a magnetic field to the ferromagnetic magnetostrictive means. , sensing coil means for sensing a change in magnetic permeability caused by a torque acting on the rotating shaft and converting it into an electrical signal corresponding to the magnitude of the torque; a fixed housing member rotatably holding a rotating shaft via a bearing means so as to substantially prevent relative wobbling of a portion of the means for sensing a change in magnetic permeability; and an electromagnetic shielding means fixedly held inside for electromagnetic shielding, the magnetic field applying coil means having an excitation bobbin and an excitation coil wound around the excitation bobbin, and the bobbin has an excitation coil protruding radially outward. a protrusion is formed, and an excitation bobbin terminal is provided on the protrusion, and the sensing coil means includes a sensing bobbin fitted onto the excitation bobbin, and a sensing coil wound around the sensing bobbin. , the sensing bobbin is provided with a notch corresponding to the protrusion of the excitation bobbin, and when the sensing bobbin is fitted onto the excitation bobbin as required, the protrusion of the excitation bobbin is inserted into the sensing coil. A torque transducer characterized in that the excitation bobbin terminal is located in a notch of the sensing bobbin, and the excitation bobbin terminal is located subsequent to the sensing bobbin terminal provided on the sensing bobbin.

[Brief Description of the Drawings] Figures 1 to 6 relate to a specific example of the torque transducer of the present invention, in which Figure 1 is a cross-sectional view of the central part, Figure 2 is an assembled view of the whole, and Figure 6 is a cross-sectional view of the central part. 3 is a partial assembly diagram, FIG. 4 is a partially completed diagram, FIG. 5 is an overall plan view, and FIG. 6 is a circuit diagram. FIGS. 7 and 8 are sectional views of main parts of different specific examples, respectively. FIG. 9 is a longitudinal cross-sectional view of a central portion of a conventional torque transducer, and FIG. 10 is a circuit diagram. In the drawing, 10 is a rotating shaft, 12 and 14 are annular bands, 26 is a fixed housing member, 30 and 32 are ball bearings, 44 is an electromagnetic shielding case, 60 and 61 are excitation coils, 62 and 63 are sensing coils, and 64 is a It is a holding member.

Claims (1)

[Claims for Utility Model Registration] A ferromagnetic magnetostrictive means that is provided on a rotating shaft and changes magnetic permeability in response to torque acting on the rotating shaft, and a magnetic field applying coil means that applies a magnetic field to the ferromagnetic magnetostrictive means. , sensing coil means for sensing a change in magnetic permeability caused by a torque acting on the rotating shaft and converting it into an electrical signal corresponding to the magnitude of the torque; a fixed housing member rotatably holding the rotating shaft via bearing means so as to substantially prevent relative wobbling of a portion of the means for sensing changes in magnetic permeability; electromagnetic shielding means for electromagnetic shielding by holding fixedly on the magnetic field applying coil means, the magnetic field applying coil means having an excitation bobbin, an excitation coil wound around the excitation bobbin, and an excitation coil protruding radially outward from the bobbin. a protrusion is formed, and an excitation bobbin terminal is provided on the protrusion, and the sensing coil means includes a sensing bobbin fitted onto the excitation bobbin, and a sensing coil wound around the sensing bobbin. , the sensing bobbin is provided with a notch corresponding to the protrusion of the excitation bobbin, and when the sensing bobbin is fitted onto the excitation bobbin as required, the protrusion of the excitation bobbin is inserted into the sensing coil. A torque transducer characterized in that the excitation bobbin terminal is located in a notch of the sensing bobbin, and the excitation bobbin terminal is located subsequent to the sensing bobbin terminal provided on the sensing bobbin.