CHUCKING MEANS

Abstract

A chuck apparatus for the fastening to a working spindle (2) of a tool machine, with a chuck body (8) comprising a receptacle (7) for the working spindle (2), with at least two chuck jaws (9) which can be adjusted radially to the body axis, and with a drive ring (10), for whose rotation taking place in the circumferential direction a drive (11) is provided, comprising a structure is formed on the drive ring (10) on its outer circumference or its inner circumference for each chuck jaw (9) and which serves for its adjusting. The invention furthermore relates to a rapid replacement system (1) with the chuck apparatus (3) as a base flange (4) and with a replacement flange (5).

Claims

1. A chuck apparatus for the fastening to a working spindle (2) of a tool machine, with a chuck body (8) comprising a receptacle (7) for the working spindle (2), with at least two chuck jaws (9) which can be adjusted radially to a body axis, and with a drive ring (10), for whose rotation taking place in the circumferential direction a drive (11) is provided, comprising a structure is formed on the drive ring (10) on its outer circumference or its inner circumference for each chuck jaw (9) and which serves for its adjusting.

2. The chuck apparatus according to claim 1, comprising the structure is formed by a control curve (14) formed on the outer circumference and with a control cam (15) serving to adjust each of said at least two chuck jaws (9) in a radially outward manner.

3. The chuck apparatus according to claim 1, comprising said drive is formed by a drive wheel (12) which can rotate about a radial access and which engages into a drive toothing (16) formed on said drive ring (10), and that a return curve (17) is formed on the side of said drive ring (10) facing said drive toothing (16) into which curve the chuck jaw (9) engages with a control member (18).

4. The chuck apparatus according to claim 3, comprising an indicator curve (19) is formed on the outer circumference of said drive ring (10) for cooperating with an indicator pin (20) for displaying a rotary position of said drive ring 10).

5. The chuck apparatus according to claim 1, comprising said chuck jaw (9) has an L-shaped base form on whose base shank (21) a control member (18) is arranged and that a pin receptacle (23 open to said drive ring (10) is formed in a second shank (22) into which a contact pin (24) is inserted in said receptacle.

6. The chuck apparatus according to claim 5, comprising the contact pin (24) has a plane surface (25) on the side facing said drive ring (10) and that the contact pin (24) comprises a pin foot (26).

7. The chuck apparatus according to one of claims 1, wherein said chuck jaw (9) comprises a groove (28) on an outside radial.

8. The chuck apparatus according to one of claims 1, comprising it forms a base flange (4) of a rapid replacement system (1) which comprises a replacement flange (5) which can be chucked by said base flange (4) and can be connected to a workpiece chuck apparatus (6).

9. The chuck apparatus according to one of claims 1, comprising an air pipe adapter (30) which can rotate at least in a limited manner about a spindle axis whereby a rotation can be derived by at least one coupling member (31) from a rotation of said drive ring (10).

10. The chuck apparatus according to claim 9, comprising at least one axially extending adapter groove (32) is formed on the air pipe adapter (30) into which said groove engages a sliding block (34) arranged on a carrier ring (33), and that a coupling member (31) is provided for a rotation of said carrier ring (33).

11. The chuck apparatus according to claim 10, comprising said carrier ring (33) comprises an outer toothing and said drive ring (10) comprises an inner toothing into which a drive pinion (35) engages as said coupling member (35).

12. The chuck apparatus according to claim 10, comprising said coupling member (31) is formed by a strut (36) rigidly coupling said drive ring (10) and said carrier ring (33).

13. The chuck apparatus according to claim 10, comprising said coupling member (31) is formed as a two-arm lever (37) supported on a shaft and whose free lever ends are coupled to said drive ring (10) and to said carrier ring (33).

14. The chuck apparatus according to claim 9, comprising one or more catch cams (39) are formed on the air pipe adapter (30) in the circumferential direction with a mutual distance.

15. A replacement flange for forming a connection to a chuck apparatus according to one of claims 7-14, comprising a collar (42) is formed from which said collar a radially inward protrusion (43) projects.

16. The replacement flange according to claim 15, comprising a coupling casing (40) is provided on which countercams (41) are formed in the circumferential direction with a mutual spacing and whose spacing is dimensioned in such a manner that upon a starting movement taking place in an axial direction on one or more catch cams (39) of a base flange (4) can pass between the countercams (41).

17. The replacement flange according to claim 15, comprising a wall of the protrusion (43) is designed with an incline in order to produce a downward traction effect.

Description

[0022] The invention is explained in detail in the following using exemplary embodiments shown in the drawings; in which:

[0023] FIG. 1 shows a perspective view of the chuck apparatus according to the invention with the chuck jaws in the open position,

[0024] FIG. 2 shows a view corresponding to FIG. 1 with a free section in sectors of the chuck body,

[0025] FIG. 3 shows a view corresponding to FIG. 1 with the chuck jaws in the chucking position,

[0026] FIG. 4 shows a view, corresponding to FIG. 2, of the chuck apparatus in FIG. 3,

[0027] FIG. 5 shows an isolated perspective view of the drive ring with the chuck jaws in the chucking position,

[0028] FIG. 6 shows an embodiment with a spindle drive arranged tangentially to the drive ring as an alternative for realizing the drive,

[0029] FIG. 7 shows a perspective view of the isolated drive ring from above,

[0030] FIG. 8 shows a perspective view of the drive ring from below,

[0031] FIG. 9 shows a perspective view of the drive ring with indicator curve and indicator pin in the rotary position,

[0032] FIG. 10 shows a view corresponding to FIG. 9 in the other rotary position,

[0033] FIG. 11 shows a perspective view of the isolated chuck jaw,

[0034] FIG. 12 Shows an isolated view of the chuck jaw from another perspective,

[0035] FIG. 13 shows a cross section through the chuck jaw,

[0036] FIG. 14 shows an alternative embodiment of the chuck apparatus according to the invention with an eccentric which can be adjusted by the structure of the drive ring and acts on the chuck jaws,

[0037] FIG. 15 shows a top view onto the eccentric of FIG. 14 in the one rotary position,

[0038] FIG. 16 shows a view corresponding to FIG. 15 in the other rotary position,

[0039] FIG. 17 shows a view corresponding to FIG. 15 with the eccentric coupled by a drive toothing to the drive ring,

[0040] FIG. 18 shows a view corresponding to FIG. 17 in the other rotary position,

[0041] FIG. 19 shows a perspective view of the chuck apparatus according to the invention supplemented by a replacement flange to a rapid replacement device,

[0042] FIG. 20 shows a view corresponding to FIG. 1 with an air pipe adapter associated with the chuck apparatus,

[0043] FIG. 21 shows a view corresponding to FIG. 19 with the replacement flange connected to the chuck apparatus as base flange,

[0044] FIG. 22 shows a view corresponding to FIG. 21 with a free section in sectors,

[0045] FIG. 23 shows an isolated view of the drive ring with the chuck jaws as well as with the air pipe adapter with carrier ring and coupling member shown in the open position of the rotary position,

[0046] FIG. 24 shows a view corresponding to FIG. 23 from a different perspective,

[0047] FIG. 25 shows a view corresponding to FIG. 23 with an alternative coupling member,

[0048] FIG. 26 shows a view corresponding to FIG. 24 with the coupling member from FIG. 25,

[0049] FIG. 27 shows a view corresponding to FIG. 23 with yet another coupling member,

[0050] FIG. 28 shows the detail XXVIII from FIG. 27,

[0051] FIG. 29 shows a view corresponding to FIG. 27 in the other chucking position,

[0052] FIG. 30 shows the detail XXX from FIG. 29,

[0053] FIG. 31 shows a view corresponding to FIG. 27 from another perspective,

[0054] FIG. 32 shows the detail XXXII from FIG. 31,

[0055] FIG. 33 shows a view corresponding to FIG. 29 from another perspective,

[0056] FIG. 34 shows the detail XXXIV from FIG. 33,

[0057] FIG. 35 shows an exploded view of the replacement flange with the coupling casing; the replacement flange is shown in section,

[0058] FIG. 36 shows a view corresponding to FIG. 21 with a free section in sectors,

[0059] FIG. 37 shows the detail XXXVII from FIG. 36 with the rotary position of the air pipe adapter corresponding to the insertion and/or removal of the coupling casing,

[0060] FIG. 38 shows a view corresponding to FIG. 36 in the chucking position,

[0061] FIG. 39 shows the detail XXXIV from FIG. 38 in the chucking position, and

[0062] FIG. 40 shows a perspective view of the chuck apparatus according to the invention with a plurality of alternative workpiece chuck apparatus arranged on replacement flanges.

[0063] FIG. 40 shows a rapid replacement system 1 consisting in the exemplary embodiment shown of a chuck apparatus 3 fastened to the working spindle 2 of a tool machine which is not shown itself as a base flange 4 and of several replacement flanges 5 on which different workpiece chuck apparatus 6 can be fastened. The chuck apparatus 3, the replacement flange 5 and the rapid replacement system 1 form independent aspects of the invention which is explained in the following.

[0064] FIG. 1 shows the chuck apparatus 3 which is provided for the fastening to the working spindle 2 of a tool machine and has a chuck body 8 comprising a receptacle 7 for the working spindle 2. Furthermore, the chuck apparatus 3 comprises at least two chuck jaws 9 which can be adjusted radially to the body axis and comprises a drive ring 10 for whose rotation in the circumferential direction a drive 11 is provided. In the exemplary embodiments shown in the drawings a total 6 of chuck jaws 9 arranged distributed uniformly over the circumference are provided and the drive 11 is basically formed by a drive wheel 12 which can rotate about a radial axis. However, even other drives 11 are conceivable which are suitable for rotating the drive ring 10. For example, no drive 11 oriented radially to the drive ring 10 is shown to this end in FIG. 6 but rather a spindle drive 13 oriented tangentially to the drive ring 10 in which the spindle casing engages via a drive tooth into a tooth receptacle of the drive ring 10.

[0065] As can be recognized in particular from FIG. 5 and FIG. 7 and FIG. 8, the drive ring 10 comprises on its outer circumference for each chuck jaw 9 a structure serving for its adjustment, namely, a control curve 14 formed on the outer circumference and with a control cam 15 serving for the radially outward adjustment of the chuck jaws 9. It is pointed out for the sake of completion that in the case of a radially inward adjusting of the chuck jaws 9 the structure can also be formed on the inner circumference of the drive ring 10.

[0066] A drive toothing 16 is constructed on the drive ring 10 on the side facing the working spindle 2 into which toothing the drive wheel 12 engages, whereby a return curve 17 is constructed on the side of the drive ring 10 facing the drive toothing 16 into which curve the chuck jaw 9 engages with a control member 18 (FIG. 8, FIG. 33). FIGS. 14 to 18 show that the adjusting of the chuck jaws 9 does not necessarily have to take place via a control cam 15 in cooperation with a return curve 17 but rather that, for example, the drive ring 10 can also act on an eccentric 44 supported in the chuck body 8 on which eccentric the chuck jaws 9 are supported. The adjustment of the eccentric 44 can take place here according to the FIGS. 15 and 16 via the cooperation of an eccentric cam pin and of a pin receptacle on the drive ring 10 or according to FIGS. 17 and 18 via a toothing.

[0067] FIGS. 9 and 10 show an embodiment in which an indicator curve 19 is formed on the outer circumference of the drive ring 10 for cooperating with an indicator pin 20 for displaying the rotary position of the drive ring 20. The indicator pin is preferably arranged in a radial bore of the chuck body 8 so that its position can be recognized optically from the outside; a checking of the radial position of the indicator pin 20 is, however, also possible with a sensor for acting on the control of the tool machine.

[0068] FIGS. 11 to 13 show that the chuck jaw 9 has an L-shaped base form on whose base shank 21 the control member 18 is arranged. A pin receptacle 23 open to the drive ring 10 is formed in the second shank 22 into which receptacle a contact pin 24 is inserted which comprises a plane surface 25 on the side associated with the drive ring 10. The contact pin 24 furthermore comprises a pin foot 26 which is secured by a safety ring 27 in the pin receptacle 23. It can be recognized in particular from FIG. 13 that the chuck jaws 9 comprises a groove 28 radially on the outside whose walls 29 are constructed with an inclination so that the groove 28 tapers toward the groove bottom.

[0069] As was already explained previously, the chuck apparatus 3 is suitable for forming the base flange 4 of a rapid replacement system 1 which comprises a replacement flange 5 as another constituting component which flange can be chucked with the chuck apparatus 3 as base flange 4. The replacement flange 5 carries the workpiece chuck apparatus 6. The jaws of this workpiece chuck apparatus 6 are adjusted in a customary manner by the air pipe associated with the tool machine so that when the chuck apparatus 3 is used as base flange 4, an air pipe adapter 30 which can rotate at least in a limited manner about the spindle axis is associated with the chuck apparatus 3, the rotation of which adapter can be derived by at least one coupling member 31 from the rotation of the drive ring 10. To this end at least one axially extending adapter groove 32 is formed on the air pipe adapter 30 (FIG. 23) into which groove a sliding block 34 arranged on a carrier ring 33 engages. The coupling member 31 is provided for the rotation of the carrier ring 33, wherein the embodiment shown in FIGS. 23 and 24 shows a drive pinion 35 as coupling member 31 which engages in an outer toothing formed on the carrier ring 33 and into an inner toothing formed on the drive ring 10.

[0070] Alternatively, the realizing of the exemplary embodiments shown in the FIGS. 25 and 26 is possible, in which the coupling member 31 is formed by a strut 36 firmly coupling the drive ring 10 and the carrier ring 33.

[0071] The embodiment shown in the FIGS. 27 to 30 shows as coupling member 31 a two-arm lever 37 supported on a shaft and whose free lever ends are coupled to the drive ring 10 and to the carrier ring 33. The free end of the two-arm lever 37 associated with the carrier ring 33 engages with a pin into a radially oriented groove while the end associated with the drive ring 10 is forked and extends over a forked cam 38 of the drive ring 10.

[0072] Catch cams 39 are formed on the air pipe adapter 30 in the circumferential direction with mutual spacing while countercams 41 are formed on a coupling casing 40 associated with the replacement flange 5 and which are also spaced in the circumferential direction. The spacing is dimensioned in such a manner that upon a starting movement of the replacement flange 5 with the coupling casing 40 taking place in an axial direction, with the one or more catch cams 39 of the base flange 4 can pass between the countercams 41 so that a covering of the one or more catch cams 39 with the countercams 40 takes place upon the rotation of the air pipe adapter 30.

[0073] FIG. 35 shows that the replacement flange 5 has a collar 42 from which from which a protrusion 43 projects in a radially inward manner, wherein the walls of the groove 28 or chuck jaws 9 and of the protrusion 43, which walls will make contact, are designed with an inclination in order to generate a downward traction effect.

[0074] The functioning of the invention is explained in the following.

[0075] Therefore, it is possible to connect the chuck body 8 one time to the working spindle 2 of the tool machine by the screws provided to this end as a replacement for a conventional tightening chuck. The chuck apparatus 3 connected in this manner to the working spindle 2 is already suitable for chucking workpieces or tools, wherein a replacement flange 5 can also be chucked. In order to carry out the chucking, at first the drive wheel 12 is actuated and the drive ring 10 is rotated in such a manner that the chuck jaws 9 are located in the open position, that is, the control cam 15 does not cooperate with the plane surface 25 of the contact pin 24 of the chuck jaws 9. It is ensured at the same time by the coupling member 31 that the carrier ring 33 rotates the air pipe adapter 30 into the open position via the sliding block 34. It is possible in this position to set the replacement flange 5 with this coupling casing 40 axially onto the base flange 4, wherein the countercams 41 of the coupling casing 40 are moved past the catch cam 39 of the air pipe adapter 30. Once this constellation has been reached, the drive wheel 12 is rotated so that the drive ring 10 is rotated out of the open position into the chucking position and the control cam 15 adjusts the chuck jaws 9 radially outward so that they surround with their groove 28 the protrusion 43 formed on the collar 42 of the replacement flange 5. In this radially occurring adjustment of the chuck jaws 9 a downward traction effect is produced due to the inclination of the walls of the groove 28 and of the protrusion 43 and which brings about a defined axial position of the replacement flange 5 opposite the base flange 4.

[0076] It should be noted that during the chucking of the replacement flange 5, the rotation of the carrier ring 33 is also already being brought about via the coupling member 31 so that the one or more catch cams 39 which are arranged axially stacked opposite the countercams 41 are rotated with the air pipe adapter 30 and therefore an overlapping of countercams 41 and of catch cams 39 takes place in the manner of a bayonet closure. This completes the connection of the base flange 4 and of the replacement flange 5 and an axial adjustment of the coupling casing 40 can be brought about by the actuation of the air pipe of the tool machine via the air pipe adapter 30 in order to adjust, for example, the chuck jaws of a tightening chuck 6 mounted on the replacement flange 5.

[0077] In order to loosen the connection of the replacement flange 5 and of the base flange 4, the drive wheel 12 is merely rotated in the opposite direction so that the drive ring 10 is rotated out of the chucked position into the open position. This brings about on the one hand the rotation of the air pipe adapter 30 so that the one or more catch cams 39 and the countercams 41 no longer overlap. At the same time, the chuck jaws 9 are adjusted radially inward by the control member 18 resting on the return curve 17 so that the groove 28 of the chuck jaw 9 comes out of engagement with the protrusion 43 of the replacement flange 5 with the result that the replacement flange 5 can be axially removed from the base flange 4. It is then possible to fasten another replacement flange 5 with a tightening chuck 6 with different qualities on the base flange 4 and therefore on the tool machine.

LIST OF REFERENCE NUMERALS

[0078] 1 rapid replacement system [0079] 2 working spindle [0080] 3 chuck apparatus [0081] 4 base flange [0082] 5 replacement flange [0083] 6 workpiece chuck apparatus [0084] 7 receptacle [0085] 8 chuck body [0086] 9 chuck jaw [0087] 10 drive ring [0088] 11 drive [0089] 12 drive wheel [0090] 13 spindle drive [0091] 14 control cam [0092] 15 control cam [0093] 16 drive toothing [0094] 17 return curve [0095] 18 control member [0096] 19 indicator curve [0097] 20 indicator pin [0098] 21 base shank [0099] 22 second shank [0100] 23 pin receptacle [0101] 24 contact pin [0102] 25 plane surface [0103] 26 pin foot [0104] 27 safety ring [0105] 28 groove [0106] 29 walls [0107] 30 longitudinal pipe adapter [0108] 31 coupling member [0109] 32 adapter groove [0110] 33 drive part [0111] 34 sliding block [0112] 35 drive part [0113] 36 strut [0114] 37 lever [0115] 38 forked cam [0116] 39 catch cam [0117] 40 coupling casing [0118] 41 countercam [0119] 42 collar [0120] 43 protrusion [0121] 44 eccentric