Torque sensor adaptor
First Claim
Patent Images
1. A torque transducer assembly comprising:
- a housing having an opening therethrough;
a torque transmission shaft extending in said opening and rotatable about an axis extending through said opening, said shaft having respective end portions accessible from exteriorly of said housing;
a torque transducer element integral with, or carried by, said shaft to emanate a magnetic field dependent on the torque in the shaft;
a magnetic field sensor arrangement located within said housing adjacent said element for sensing the torque-dependent field, said sensor arrangement being operable to provide a torque-dependent signal; and
means for communicating said torque-dependent signal to a signal externally of the assembly.
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Abstract
The invention relates to a torque transducer assembly and to a torque transducer incorporating such an assembly. The invention has particular application to measuring torque in a fastening tool in which torque is generated in pulses and to measuring torque in an adaptor mountable to a pulsed-torque type of fastening tool.
35 Citations
24 Claims
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1. A torque transducer assembly comprising:
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a housing having an opening therethrough;
a torque transmission shaft extending in said opening and rotatable about an axis extending through said opening, said shaft having respective end portions accessible from exteriorly of said housing;
a torque transducer element integral with, or carried by, said shaft to emanate a magnetic field dependent on the torque in the shaft;
a magnetic field sensor arrangement located within said housing adjacent said element for sensing the torque-dependent field, said sensor arrangement being operable to provide a torque-dependent signal; and
means for communicating said torque-dependent signal to a signal externally of the assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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- 12. An electrical power generator comprising a permanent magnet disposed to move freely back-and-forth along a predetermined path between prescribed limits, a coil winding through which the predetermined path extends, the magnet and coil being so arranged that back-and-forth movements of the magnet with respect to the coil generates electromagnetic frequencies in the coil, and a rectifier arrangement for deriving voltage of a given polarity from the electromagnetic frequencies.
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21. A pulsed-type power torque tool to which an electrical power generator is mounted, the electrical power generator comprising a permanent magnet disposed to move freely back-and-forth along a predetermined path between prescribed limits, a coil winding through which the predetermined path extends, the magnet and coil being so arranged that back-and-forth movements of the magnet with respect to the coil generates electromagnetic frequencies in the coil, and a rectifier arrangement for deriving voltage of a given polarity from the electromagnetic frequencies, whereby the magnet is reciprocated back-and-forth along said predetermined path with respect to the coil by the vibration of the power torque tool when in operation.
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22. A torque transducer assembly comprising
a housing having an opening therethrough; -
a torque transmission shaft disposed in said housing for rotation about an axis extending through said opening, said shaft having a first portion supported in an annular bush secured to the housing and from which first portion and output portion of the shaft projects, said first portion having a torque transducer element integral therewith, or carried thereby, to emanate a magnetic field dependent on the torque in the shaft, a magnetic field sensor arrangement embedded in said bush adjacent said element for providing a torque-dependent signal, said shaft having a second portion distal said output portion and at least partially contained within said opening, said second portion being of larger cross-section then said first portion and abutting said bush;
first means for locating said second portion to rotate with respect to said housing; and
second means for applying axial force between the housing and said second portion to maintain same in abutment. - View Dependent Claims (23, 24)
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Specification