JPH0135798Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a loader gripper that allows a chuck having a guide pin of a grinding machine to grip a gear-shaped workpiece.

Conventional technology In conventional chucking using tooth surfaces,
When the over pin attached to the diaphragm is engaged with the tooth surface of the gear gripped by the loader and the gear is positioned and gripped, the gear is guided by a conical guide pin so that the phase with the tooth surface matches.

Problems that the invention aims to solve: Because the guide pin is conical, when it is brought in by a loader, the tooth surface is usually indexed and can be gripped comfortably with the over pin, but sometimes the tooth ridge and the guide pin do not touch each other. Otherwise, it may become impossible to insert. In this case, the loader arm is moved backward, the main shaft is inched to shift the phase of the teeth, and the loader arm is moved forward again until the pin can be inserted, which is repeated, resulting in a longer cycle time. In addition, there were cases where the contact between the chucking reference surface and the end surface of the workpiece became uneven.

Means for solving the problem Sleeve member 1 rotatably supported on the loader arm 11 and having an axial groove 30a cut on the inner surface of the tip
6, 30, and a grip portion 21 for gripping a gear-like workpiece at the tip thereof, which is rotatably supported by the sleeve member 16 so as to be slidable in the axial direction, and has a lead groove 23 on the outer periphery inclined with respect to the rotation axis and a circumferential surface. The gripper shaft 17 with the groove 24 cut therein and the lead groove 23 of the gripper shaft 17
a first drive pin 25 that engages with the sleeve member 16 and is implanted in the direction perpendicular to the axis thereof; and a gear-shaped workpiece that is in contact with the end surface of the grip portion of the gripper shaft 17, is supported in a floating state, and is gripped by the grip portion. A floating plate 26 for pressing the end surface of the object, a spring 29 for biasing the floating plate 26 toward the gripped workpiece, and a spring 29 embedded in the floating plate 26 in a direction perpendicular to the axis and supporting the axis of the inner surface of the sleeve member. The second drive pin 28 is engaged with the inner circumferential groove 24 of the gripper shaft 17 as well as the inner circumferential groove 24 of the gripper shaft 17.

Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings. For example, the chuck 1 of a grinding machine has a well-known floating structure, and the jaws 3 are attached to the diaphragm 2 at three equal angular positions radially, and the over pins 4 for positioning and gripping are arranged parallel to the chuck axis and concentrically with the diaphragm 2. A guide pin 5 is likewise provided on each of the legs 3, which faces radially in front of the overpin and has a conical inner end. An end stopper 6 is provided at the center of the chuck, which serves as a reference surface for the workpiece. A gear 7 having teeth 8 carved into the chuck 1 is carried in and out by a loader. A housing 12 having a flange 12a is inserted into the boss 11b at the end of the loader arm 11 of the loader with a gap between the boss 11b.
Three jack bolts 13 are screwed in the radial direction at three equal positions on the circumference of the housing 12, and three jack bolts 13 are screwed in parallel to the axis of the hole at three equal angular positions on the flange 12a of the housing 12, and are screwed into threaded holes on the end face of the boss 11b. The axis of the housing 12 is aligned and attached by three jack bolts 14 provided therein. A sleeve 16 is rotatably supported in the hole of the housing 12 via a bearing 15, and a gripper shaft 17 is rotatably and axially movably supported on the sleeve 16 by a DU metal 18 or the like. This gripper shaft 17 protrudes toward the chuck 1 side to become a grip part 21, and is buried at approximately the center of the part into which the workpiece is inserted, with the head being biased radially outward by a spring 19 and protruding from the outer circumferential surface so as to be movable forward and backward. Grip balls 20 are provided at three equal angular positions to grip a workpiece. A flange body 22 for preventing the gripper shaft 17 from coming off is bolted to the opposite end, and a lead groove 23 is cut in the center and a circumferential groove 24 is cut in the vicinity of the gripper portion. The sleeve 16 is in the lead groove 23.
A drive pin 25, which is implanted inward in a direction perpendicular to the axis of the shaft, is engaged with the drive pin 25. Grip shaft 17
A floating plate 26 having a flange portion with a flat end surface that contacts the grip portion 21 and the end surface of the gear 7 is inserted in a floating state through a metal 27, and is inserted into the boss portion 26a in a direction perpendicular to the axis. A drive pin 28 is implanted and protrudes outward and inward from the boss, and the inwardly protruding end is attached to the gripper shaft 17.
is engaged with the circumferential groove 24 of. A compression spring 29 is interposed between the floating plate 26 and the end face of the sleeve 16, so that the floating plate 26 is always pressed against the step of the gripper portion. An intermediate collar 30 having a length extending over the boss portion 26a of the floating plate 26 and the sleeve 16 is mounted on the outside of the compression spring 29, and a drive pin is inserted into a groove 30a cut in the axial direction on the inner surface of the boss 26a. The outwardly projecting ends of 28 are engaged. Also, intermediate color 30
A drive pin 31 that protrudes radially inward is implanted at a position overlapping the sleeve 16, and its protruding end is cut in the sleeve 16 in the axial direction and engages with the notch 16a.

Operation When the over pin 4 and guide pin 5 of the chuck 1 are open, the loader gripper inserts the gear 7 into the grip part 21 and releases the three gripper balls 20.
, position the loader arm 11 almost concentrically with the front surface of the chuck 1, and move it toward the chuck 1 to the left in the figure. When the guide pin 5 is almost in phase with the tooth root of the tooth 8 of the gear 7, the over pin 4 enters the tooth surface and the gear 7 is pressed against the end stopper 6, the chuck 1 is closed, and the over pin 4 makes it concentric with the chuck shaft. be grasped. If the teeth of the guide pin 5 and the gear 7 match and come into contact with each other, the gear 7 will be pushed back by the gripper arm 11 moving to the left, and the gripper will be pushed back by the drive pin 28 that engages with the floating plate 26 and the inner circumferential groove. Axis 17 is shown to the right in the figure. At this time, since the drive pin 25 is engaged with the lead groove 23, the gripper shaft 17 attempts to rotate. The sleeve 16 also tries to pivot in the opposite direction. However, since the rotation from the sleeve 16 is connected to the floating plate 26 via the drive pin 31, intermediate collar 30, and drive pin 28, the rotation of the gripper shaft 17 or the floating plate 26 depends on the amount of friction at each part. When one of the gears is rotated, the gear 7 is rotated, and when the guide pin 5 and the gear valley are in phase, the gear 7 is smoothly inserted by the force of the compressed compression spring 29, and the end face of the gear 7 is rotated. is pressed into contact with the end stopper 6 of the chuck 1 and held by the over pin 4. At this point of crimping, the gripper shaft 17 is pushed by the floating plate 26 and the drive pin 28, and by the same action as described above, the gripper shaft 17 or the floating plate 26 rotates, and the end face of the turning gear 7 slides on the surface of the end face stopper 6. It is crimped.

Effects As detailed above, in the present invention, when the guide pin and the tooth are in contact, the lee groove of the gripper shaft and the drive pin of the sleeve are in an engaged state, so that the axial movement of the gripper shaft is caused by the movement of the gripper shaft or the sleeve. Since the gear rotates to match the phase with the over pin, the simple structure allows for smooth insertion chucking, eliminates the risk of damaging the over pin, and shortens cycle time. can. Further, due to the rotation of the gear, the end face of the gear comes into sliding contact with the end face stopper, thereby improving the accuracy of the end face. Furthermore, it has the effect of being immediately compatible with conventional loader grippers.

[Brief explanation of drawings]

The drawing is a longitudinal sectional view of the gripper of the present invention. 1...Chuck, 4...Over pin, 5...Guide pin, 6...End stopper, 7...Gear, 1
1...Loader arm, 16...Sleeve, 17...
...Gritzpa axis, 20...Gritzpa ball, 21...
...Grip part, 23...Lead groove, 25, 28,
31...Drive pin, 26...Floating plate, 29...Compression spring, 30...Intermediate collar.

Claims (1)

[Scope of utility model registration request] In a loader that conveys a gear-shaped workpiece to a chucking device that uses tooth surfaces, the loader arm 11
It is rotatably supported on the shaft and has an axial groove 30 on the inner surface of the tip.
Sleeve members 16 and 30 having a cut shape a, and a grip portion 21 for gripping a gear-shaped workpiece at the tip thereof, are rotatably supported on the sleeve member so as to be slidable in the axial direction, and have an outer periphery inclined with respect to the rotation axis. a gripper shaft 17 with a lead groove 23 and a circumferential groove 24 cut therein; a first drive pin 25 that engages with the lead groove of the gripper shaft and is implanted in the sleeve member in a direction perpendicular to the axis; A floating plate 26 that comes into contact with the end surface of the grip portion and is supported in a floating state to press the end surface of the gear-shaped workpiece gripped by the grip portion; and a spring 29 that biases the floating plate toward the gripped workpiece. , a second drive pin 28 embedded in the floating plate in a direction perpendicular to the axis and engaged with an axial groove on the inner surface of the sleeve member and an inner circumferential groove of the gripper shaft; A loader gripper characterized in that when the phases of the surfaces are out of alignment, a gear-shaped workpiece is pressed and rotated so that the phases are matched.