Tools – Wrench – screwdriver – or driver therefor – Having work engaging and force exerting portion inserted...
Patent
1982-06-04
1984-05-08
Schmidt, Frederick R.
Tools
Wrench, screwdriver, or driver therefor
Having work engaging and force exerting portion inserted...
B25B 1500
Patent
active
044467656
DESCRIPTION:
BRIEF SUMMARY
The invention of this application is disclosed in corresponding International Application No. PCT/AU 81/00142 filed Oct. 2, 1981.
DESCRIPTION
The present invention relates to a torque transmitting device.
The torque transmitting device of the present invention is particularly adapted to be impulse driven into an internal bore in a workpiece.
SUMMARY OF THE INVENTION
In accordance with the present invention there is provided a torque transmitting device comprising a shaft having a longitudinal axis, wherein the shaft is formed with at least one groove extending longitudinally of the shaft, a workpiece engaging jaw is mounted in the or each groove, means is provided for retaining the or each jaw in its respective groove, and wherein the or each groove is tilted with respect to the axis of the shaft so that the or each jaw is non-aligned with the longitudinal axis of the shaft.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a side elevation of a torque transmitting device of the present invention;
FIG. 2 is an end elevation of the device of FIG. 1 along the line II--II of FIG. 1;
FIG. 3 is a sectional view of the device of FIG. 1 along the line III--III of FIG. 1;
FIG. 4 is a side elevation of a torque transmitting device similar to that shown in FIG. 1 with certain internal features indicated in phantom;
FIG. 5 is a side elevation of a workpiece engaging jaw for use with the devices of FIGS. 1 to 4; and
FIG. 6 is an end elevation of the workpiece engaging jaw of FIG. 5.
DESCRIPTION OF THE INVENTION
FIGS. 1 to 3 and FIG. 4 show respectively two different embodiments of the present invention as will be described hereinafter. For convenience like reference numerals will be used to denote like parts in the two embodiments.
In FIGS. 1 to 3, there is shown a torque transmitting device adapted to be impulse driven into an internal bore in a workpiece. The workpiece can take many forms. For example, it may be a tube in threaded engagement with a matching component, a threaded shaft, a stud, or a sheared bolt having no external means of torque connection and having a hole therein to receive the device of the present invention.
The device of FIGS. 1 to 3 comprises a head 10, a hexagonal nut 11, a metal washer 12 and a slotted annular collar 13.
The head 10 is integrally formed with an externally threaded shaft 14. Further, the head 10 contains a hexagonal recess 15 arranged to receive an Allen key. The nut 11 is threadedly mounted on the shaft 14 and is located adjacent the head 10. The washer 12 is located between the nut 11 and the annular collar 13. The washer 12 and annular collar 13 are not threadedly engaged on the shaft 14 but are mounted thereabout in a snug fitting relationship.
The shaft 14 contains three longitudinally extending grooves 16. Each groove 16 extends from the end of the shaft 14 remote from the head 10 to a point spaced from but adjacent to the head 10.
As can best be seen in FIG. 3 each groove 16 is tilted so as to be non-aligned with longitudinal axis 17 of the shaft 14. Each groove 16 is tilted towards the direction of rotation of the shaft 14 upon removal of a workpiece.
The tilting means that jaws 19 which will be described hereinafter, take compression force rather than shear force thus reducing the possibility of shear and facilitating the use of thinner jaws 19. Preferably, the grooves 16 are tilted at an angle in the range from 4.degree. to 40.degree.; more preferably from 4.degree. to 25.degree., with respect to a diametrical line extending from the centre of the outer end of a groove through the axis of the shaft 14. Further, each groove 16 slopes downwardly into the shaft 14 away from the annular collar 13. This can best be seen in FIG. 4 where the slope of the corresponding groove 16 of that embodiment of the present invention is clearly shown in phantom. Preferably, the inclined plane of the slope of the groove 16 is inclined at an angle in the range from
REFERENCES:
patent: 1366647 (1921-01-01), Gooding
patent: 1554287 (1925-09-01), McGuckin
patent: 1754736 (1930-04-01), Bryant
patent: 1813567 (1931-07-01), Delorme
patent: 2781683 (1957-02-01), Weeks
Schmidt Frederick R.
Zatarga J. T.
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