CHANGER DEVICE FOR CLAMPING HEADS

Abstract

A changer device for a clamping head having a base and pivoting elements pivotably articulated on the base and which in each case possess at least one engagement portion for impinging clamping jaws of the clamping head with a force. The changer device has a coupling transmission which per pivoting element possesses at least one coupling tab attached so as to be pivotably movable on the respective pivoting element. The changer device has a handle which for the purpose of simultaneous repositioning of the pivoting elements in relation to the base is movable in a relative manner. The handle is locationally fixed in relation to one of the coupling tabs such that a pivoting movement of the handle directly causes pivoting of the coupling tab and indirectly causes pivoting of the further coupling tab such that a pivoting movement of the pivoting elements and the engagement portions is caused.

Claims

1. A changer device for clamping heads, having the following features: a. the changer device is configured for inserting a clamping head into a chuck and/or for removing the clamping head from the chuck, wherein the clamping head has a plurality of clamping jaws which in a radial direction are mutually repositionable and which by the changer device in the radial direction in a mutually converging or mutually diverging manner are impingable with a force, and b. the changer device possesses a base, and c. the changer device possesses a plurality of pivoting elements which are articulated so as to be pivotable on the base and which in each case possess at least one engagement portion for impinging the clamping jaws with a force, and d. the changer device possesses a coupling transmission which per pivoting element possesses at least one coupling tab which is attached so as to be pivotably movable on the respective pivoting element, wherein the pivoting elements in terms of the movement thereof in relation to the base are coupled by way of the coupling tabs, and e. the changer device possesses a handle which for the purpose of the simultaneous repositioning of the pivoting elements in relation to the base is movable in a relative manner, and f. the handle is configured so as to be locationally fixed in relation to one of the coupling tabs such that a pivoting movement of the handle directly causes pivoting of said coupling tab and indirectly causes the pivoting of the at least one further coupling tab such that, on account thereof, a pivoting movement of the pivoting elements and of the engagement portions provided thereon is caused.

2. The changer device as claimed in claim 1, having the following additional feature: a. the handle extends outward in the radial direction.

3. The changer device as claimed in claim 2, having the following additional feature: a. the handle extends beyond a central axis of the changer device in the radial direction.

4. The changer device as claimed in claim 1, having the following additional feature: a. a counter handle which in relation to the handle is spaced apart in such a manner that both handles can conjointly be encompassed by one hand is provided.

5. The changer device as claimed in claim 4, having at least one of the following additional features: a. the counter handle extends outward in the radial direction, and/or b. the counter handle is fixedly attached to the base.

6. The changer device as claimed in claim 1, having the following additional feature: a. the changer device possesses at least three pivoting elements each of which possesses at least one engagement portion.

7. The changer device as claimed in claim 1, having the following additional feature: a. the coupling transmission possesses a coupling slide which is guided in a linear manner and to which the coupling tabs are attached so as to be pivotably movable.

8. The changer device as claimed in claim 1, having the following additional feature: a. the pivoting elements are articulated on the base by way of a pivoting element axis which is locationally fixed in relation to the respective pivoting element and to the base.

9. The changer device as claimed in claim 1, having the following additional feature: a. the guiding of the coupling slide is performed by means of a guide duct on the base, the coupling slide being guided so as to be movable in a sliding manner in said guide duct.

10. The changer device as claimed in claim 1, having the following additional feature: a. the guide duct has an inward-pointing guide wall which has at least two slot-shaped through holes for the coupling tabs.

11. The changer device as claimed in claim 1, having the following additional feature: a. the engagement portions are provided as pin-shaped appendages on a lower end of the pivoting elements, wherein preferably at least two pin-shaped appendages are in each case provided on each of the pivoting elements.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Further advantages and aspects of the invention are derived from the claims and from the description hereunder of a preferred exemplary embodiment of the invention which is explained hereunder by means of the figures in which:

[0026] FIG. 1 shows a changer device according to the invention together with a clamping head which is capable of being handled by said changer device and which in the intended use in operation is inserted into a chuck;

[0027] FIG. 2 shows the changer device as per FIG. 1 in an illustration from below as well as the clamping head from above so that the manner of the interaction becomes evident; and

[0028] FIGS. 3A and 3B show the changer device in a sectional illustration in the non-activated state and in the activated state for the purpose of a changing procedure.

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENT

[0029] FIG. 1 shows a changer device 10 according to the invention including the clamping head 100 which according to the intended use is to be manipulated by said changer device. The changer device 10 possesses a base 20 which so to speak accounts for the primary component part of the changer device 10. Said base 20 possesses three outriggers which extend radially in relation to a central axis 2 and which are in each case mutually spaced apart by 120. A recess 26 which is open in a radially outward manner and in which a pivoting element 30 is disposed is provided on each of said outriggers. The base 20, in a centrical manner, possesses a guide duct 22 in which a coupling slide 42 as a central element of a coupling gearbox 40 is disposed.

[0030] The pivoting elements 30 by means of pins 28 are in each case articulated on the base 20 so as to be pivotably movable about pivoting element axes 4. The coupling slide 42 in relation to the base 20 is movable in a linear manner along the central axis in the direction of the arrows 2A and 2B. The coupling slide 42 and the pivoting elements 30 are connected to one another by way of coupling tabs 46 which are articulated so as to be pivotable about pivot axes 6 on the pivoting elements 30 and about pivot axes 8 on the coupling slide 42. This fundamental constellation leads to a linear repositioning of the coupling slide 42 in relation to the base 20 causing conjoint pivoting of the coupling tabs 46 and thus likewise conjoint pivoting of the pivoting elements 30. In order for this pivoting movement of the coupling tabs 46 to be caused, one of the coupling tabs 46 is connected directly to a handle 50 which is pivotable in relation to a counter handle 60 which is fixed on the base, so as to on account thereof be able to conjointly pivot all three pivoting elements 30.

[0031] As can be seen by means of FIG. 2, engagement portions 32 in the form of pins are in each case provided on the lower side of the pivoting elements 30. In a manner corresponding to bores 102 in the clamping jaws 104 of the clamping head 100, said engagement portions 32 are disposed in pairs. The clamping jaws 104 are connected to one another by connection portions 106 from an elastic material such that said clamping jaws 104 can become pressed in the radial direction 9, counter to a spring force cause by said elastic material. In the compressed state, the holding webs 108 provided on the clamping jaws 104 are then likewise sufficiently compressed in order for an insertion or removal, respectively, of the clamping head 100 into or from a chuck (not illustrated) to be possible in this instance.

[0032] The interaction will be explained once again with reference to FIGS. 3A and 3B. These figures show a section through the changer device 10 along the direction of extent of the handle 50 and of the counter handle 60. For clarification it is to be mentioned that the sections would appear identical when rotated by 120 or 240, respectively, about the central axis, except for the arrangement of the handle 50 and of the counter handle 60.

[0033] FIG. 3A shows the non-activated state of the changer device 10. When the handle 50 and the counter handle 60 now are conjointly gripped by the hand of the operator and converged, this leads to pivoting of the coupling tab 46 shown in a sectional manner in FIG. 3A.

[0034] The coupling tab 46 is attached so as to be pivotably movable about the pivot axis 8 on the coupling slide 42, the latter being movable in a linear manner along the central axis 2. Said pivot axis 8 is defined by a pin 48 which is received in bores of the coupling tab 46 and of the coupling slide 42.

[0035] The coupling tab 46 is furthermore attached so as to be pivotably movable about the pivot axis 6 on the pivoting element 30. Said pivot axis 6 is defined by a pin 44 in bores of the pivoting element 30 and of the coupling tab 46. The pivoting element 30 itself is attached so as to be pivotable about the pivoting element axis 4 on the base.

[0036] The pivoting of the coupling tab by virtue of said linkages leads to a downward repositioning of the coupling slide 42 in the direction of the arrow 2B as well as to a radially inward pivoting of the engagement portions 32 of the pivoting element 30. The two other coupling tabs 46 by way of the coupling slide 42 are also pivoted to approximately the same extent as the coupling tab 46 that is fastened to the handle 50 such that the two pivoting elements 30, which are conjointly moved only in an indirect manner, are also pivoted and the respective engagement portions 32 of the latter are repositioned in a radially inward manner.

[0037] With reference to FIG. 2, in the case of a clamping head 100 coupled thereto, this leads to the external diameter shrinking in the region of the holding web 108 and the clamping head 100 thus being able to be removed from the chuck or to be inserted into the latter.