Quick-coupling face-driver assembly of a rotary drive device and method for changing face drivers
OwnerKevin J. Bissettinventor
Life of this patent
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Abstract
A face-driver assembly and method for accurate coupling of a face driver with the spindle of a rotary-drive machining device. The assembly includes a face driver, a hub on the spindle defining a prealignment bore, a pair of self-centering coacting tooth sets on the hub and face driver, an engagement post extending into the hub and forming a prealignment shaft closely complementary to the prealignment bore, and a releasable coupling to hold and draw the engagement post rearwardly and thereby join the tooth sets in a manner facilitating final accurate centering.
Claims16
A face-driver assembly for removable coupling of a face driver with a spindle of a rotary-drive machining device along the spindle axis, comprising:
- a face driver having forward and rear ends;
- a hub on the spindle and defining a prealignment bore;
- a pair of annular, self-centering coacting tooth sets, one set on the hub and one set on the face driver;
- an engagement post extending rearwardly from the face driver and forming a prealignment shaft which is closely complementary to the prealignment bore allowing insertion of the prealignment shaft into the prealignment bore;
- and
- interengageable means on the hub and engagement post to releasably hold and draw the engagement post rearwardly, thus drawing the prealignment shaft further into the prealignment bore to join the tooth sets to facilitate final accurate centering;
- thereby facilitating quick face-driver mounting with final accurate centering of the face driver for accurate torque transmission to a workpiece held by the face driver.
A face-driver assembly for removable coupling of a face driver with a spindle of a rotary-drive machining device along the spindle axis, comprising:
- a face driver having a rear end;
- a pair of self-centering tooth sets, one set secured with respect to the face-driver rear end and the other set secured with respect to the spindle;
- a closely-complementary prealignment member and prealignment receptacle, one secured with respect to the face-driver rear end and the other secured with respect to the spindle allowing insertion of the prealignment member into the prealignment receptacle;
- and
- releasably interengageable means, including one portion secured with respect to the face-driver rear end and a second portion secured with respect to the spindle, to releasably hold and draw the face driver rearwardly after the prealignment member is inserted in the prealignment receptacle, thus drawing the prealignment member further into the prealignment receptacle to join the tooth sets to facilitate final accurate centering;
- thereby facilitating final accurate face-driver centering for accurate torque transmission to a workpiece held by the face driver.
A method for changing face drivers used on rotary-drive machining devices which have spindles for rotating workpieces, comprising:
- providing, pre-installed on the spindle, a hub defining a prealignment bore, the hub having a first annular tooth set thereon and a first releasable coupling means;
- providing, pre-installed on each face driver, (a) a second annular tooth set which is self-centering on the first tooth set, (b) an engagement post which extends rearwardly from the face-driver for insertion into the hub and forms a prealignment shaft closely complementary to the prealignment bore, and (c) a second releasable coupling means engageable with the first coupling means;
- disengaging the first coupling means from the second coupling means of a first such face driver;
- withdrawing the engagement post from the hub in removing the first face driver;
- inserting the engagement post of a second such face driver into the hub by inserting the prealignment shaft of the second face driver into the prealignment bore, thereby to prealign the second face driver with the spindle;
- engaging the first coupling means with the second coupling means of the second face driver;
- drawing the engagement post rearwardly, thus drawing the prealignment shaft further into the prealignment bore thereby to join the tooth sets in a manner facilitating final accurate centering of the second face driver on the axis of the spindle.
A coupling assembly for removable coupling of a workpiece-holder with a spindle of a rotary-drive machining device along the spindle axis, comprising:
- a workpiece-holder having forward and rear ends;
- a hub on the spindle and defining a prealignment bore;
- a pair of annular, self-centering coacting tooth sets, one set on the hub and one set on the workpiece-holder;
- an engagement post extending rearwardly from the workpiece-holder and forming a prealignment shaft which is closely complementary to the prealignment bore allowing manual insertion of the prealignment shaft into the prealignment bore;
- and
- interengageable means on the hub and engagement post to releasably hold and draw the engagement post rearwardly, thus drawing the prealignment shaft further into the prealignment bore to join the tooth sets to facilitate final accurate centering;
- thereby facilitating quick workpiece-holder mounting with final accurate centering of the workpiece-holder for accurate torque transmission to a workpiece held by the workpiece-holder.
Dependencies are inferred from the claim text.