Machine tools abstract
A device for finely adjusting stop members, locating bolts, contoured
fitting pieces or adapters and similar components on chucking devices,
particularly for measuring machines and machine tools, includes
a base member to be fastened to the chucking device and a tightening
screw. A first guide member which is adjustable in the axial direction
of the tightening screw is mounted on the base member. A second
guide member mounted on the first guide member is adjustable transversely
of the axial direction of the tightening screw. Mounted on the second
guide member is an end member which is adjustable in the adjusting
plane of the second guide member but transversely of the adjusting
direction of the second guide member. The tightening screw extends
through bores formed in the base member, the first and second guide
members and the end member which are arranged one on top of the
other.
Machine tools claims
I claim:
1. A device for finely adjusting stop members, locating bolts,
contoured fitting pieces or adapters and similar components on chucking
devices, particularly for measuring machines and machine tools,
the device comprising a base member adapted to be fastened to a
chucking device, a tightening screw having an axial direction, a
first guide member mounted on the base member so as to be adjustable
in the axial direction of the tightening screw, a second guide member
mounted on the first guide member so as to be adjustable in an adjusting
plane transversely of the axial direction of the tightening screw,
further comprising an end member mounted on the second guide member
so as to be adjustable in the adjusting plane of the second guide
member but transversely of the adjusting direction of the second
guide member, first guide means between the first guide member and
the second guide member and second guide means between the second
guide member and the end member, wherein the first guide means extend
perpendicularly of the second guide means, wherein the base member,
the first and second guide members and the end member each have
a bore, and wherein the tightening screw extends through the bores
of the base member, the first and second guide members and the end
member.
2. The device according to claim 1 wherein the tightening screw
comprises a head, a thread and a diameter, wherein the bores in
the first and second guide members each have a diameter which is
greater than the diameter of the tightening screw such that the
first and second guide members are movable in the plane extending
perpendicularly of the axial direction of the tightening screw,
the end member further comprising a threaded bore for receiving
the thread of the tightening screw.
3. The device according to claim 1 further comprising a threaded
ring mounted between the base member and the first guide member,
the base member having a thread arranged concentrically relative
to the tightening screw, wherein the threaded ring is screwed onto
the thread of the base member for effecting the adjustment of the
first guide member in the axial direction of the tightening screw.
4. The device according to claim 3 wherein the base member and
the first guide member comprise guide bores, further comprising
guide pins received in the guide bores and extending between the
base member and the first guide member parallel to the tightening
screw.
5. The device according to claim 1 further comprising a draw key
with an inclined surface mounted between the base member and the
first guide member, the base member having an inclined surface contacting
the inclined surface of the draw key, further comprising an adjusting
screw for adjusting the draw key in a direction extending perpendicularly
of the axial direction of the tightening screw so as to adjust the
first guide member in the axial direction of the tightening screw.
6. The device according to claim 5 wherein the base member and
the first guide member comprise guide bores, further comprising
guide pins received in the guide bores and extending between the
base member and the first guide member parallel to the tightening
screw.
7. The device according to claim 1 wherein the first and second
guide means are tongue and groove guide means.
8. The device according to claim 7 further comprising additional
adjusting screws for finely adjusting each tongue and groove guide
means.
Machine tools description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a device for finely adjusting
stop members, locating bolts, contoured fitting pieces or adapters
and similar components on chucking devices, particularly for measuring
machines and machine tools.
2. Description of the Related Art
In chucking devices of this type, a number of stop members, locating
bolts and similar components are provided which, after a first coarse
positioning, must be adjusted very accurately in all three axial
directions. In the past, this has only been possible in an unsatisfactory
manner. It is either necessary to adjust the entire chucking device
or the individual stop member, or the respective locating bolt must
be worked on or aligned individually in another manner.
SUMMARY OF THE INVENTION
Therefore, it is the primary object of the present invention to
provide a device of the above-described type which makes possible
a problem-free and particularly exact fine adjustment of the aforementioned
stop members and the like in all three axial directions.
In accordance with the present invention, the fine adjustment device
includes a base member to be fastened to the chucking device and
a tightening screw. A first guide member which is adjustable in
the axial direction of the tightening screw is mounted on the base
member. A second guide member mounted on the first guide member
is adjustable transversely of the axial direction of the tightening
screw. Mounted on the second guide member is an end member which
is adjustable in the adjusting plane of the second guide member
but transversely of the adjusting direction of the second guide
member. The tightening screw extends through bores formed in the
base member, the first and second guide members and the end member
which are arranged one on top of the other.
By arranging two guide members between the base member and the
end member it is possible to adjust each member in an axial direction.
The first guide member is adjusted in vertical direction, i.e.,
in the axial direction of the tightening screw. The second guide
member is adjusted in a certain direction in a plane extending perpendicularly
to the axial direction. The end member is adjustable also in this
plane, but perpendicularly of the adjusting direction of the second
guide member. Consequently, the end member is adjustable in all
three directions, i.e., in the direction of the tightening screw
and in any desired direction in the plane which extends perpendicularly
of the tightening screw. For carrying out the adjustments, the tightening
screw is released, the adjustment is carried out and the tightening
screw is subsequently tightened again.
In accordance with an additional feature of the present invention,
the adjustment of the first guide member in axial direction of the
tightening screw is effected by means of a threaded ring which is
screwed onto the tightening screw.
In accordance with another feature, instead of the threaded ring,
a draw key is provided whose inclined surface rests on an adjacent
inclined surface of the base member and which is adjustable perpendicularly
of the axial direction of the tightening screw by a separate adjusting
screw. In this embodiment, the inclined surfaces provide a larger
contact area and, thus, the components are better secured against
tilting and wiggling.
The various features of novelty which characterize the invention
are pointed out with particularity in the claims annexed to and
forming a part of the disclosure. For a better understanding of
the invention, its operating advantages, specific objects attained
by its use, reference should be had to the drawing and descriptive
matter in which there are illustrated and described preferred embodiments
of the invention.
BRIEF DESCRIPTION OF THE DRAWING
In the drawing:
FIG. 1 is an exploded perspective view of an embodiment of the
device according to the present invention;
FIG. 2 is a perspective view of the device of FIG. 1 in the assembled
state in the so-called "zero position";
FIG. 3 is the same view as FIG. 2 except that the components are
adjusted in all three axial directions;
FIG. 4 is a sectional view of the device of FIG. 2 as seen from
above;
FIG. 5 is sectional view corresponding to FIG. 4 but seen from
below; and
FIG. 6 is an exploded perspective view of another embodiment of
the device according to the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The device according to the present invention is shown in all figures
of the drawing in perspective views. The device is composed of four
members, i.e. a base member 1 a first guide member 2 a second
guide member 3 and an end member 4. The bodies 2 3 and 4 are each
adjustable in an axial direction. The first guide member 2 is adjustable
in the Z-direction, the second guide member 3 is adjustable in the
Y-direction and the end member 4 is adjustable in the X-direction.
These directions are indicated in FIG. 2 by arrows.
A tightening screw 6 extends through all four bodies 1 2 3 and
4. The tightening screw 6 is loosened when a fine adjustment is
to be carried out. The tightening screw 6 is received in a recess
of the base member 1. The head 16 is provided with receiving openings
for a tool, so that the screw 6 can be loosened and tightened. For
this purpose, the base member 1 has a recess 22. The head 16 of
the tightening screw 6 is accessible through the recess 22.
The tightening screw 6 extends through the two guide members 2
and 3 through a bore 23 each, wherein the diameter of the bore 23
is greater than the diameter of the tightening screw 6 so that
movements of the two guide members 2 and 3 in the plane extending
perpendicularly of the tightening screw 6 are possible. A thread
17 is provided in the end member 14 into which the tightening screw
6 can be screwed.
In the embodiment illustrated in FIG. 1 a threaded ring 5 is arranged
between the base member 1 and the first guide member 2. The threaded
ring 5 is screwed onto a thread 18 of the base member 1 which is
located centrally relative to the tightening screw 6 and the corresponding
throughbore. As is the case for the head 16 the threaded ring 5
is accessible from the outside, so that a tool can engage the threaded
ring 5.
A tongue 10 is provided on the first guide member 2. The tongue
10 engages in a groove in the second guide member 3. Provided perpendicularly
of the tongue 10 on the second guide member 3 is a tongue 11 which
engages in a groove 14 of the end member 4. As a result, the second
guide member 3 can be moved in one direction in the plane extending
perpendicularly of the tightening screw 6 and the end member 4 is
movable in this plane perpendicularly of the second guide member
3.
In order to carry out these movements in the plane extending perpendicularly
of the tightening screw 6 two adjusting screws 8 and 9 are provided
for each tongue and groove connection. By turning these adjusting
screws which make contact with the corresponding tongue, this tongue
and, consequently, either the second guide member 3 or the end member
4 are adjusted in the desired direction in the plane extending perpendicularly
of the tightening screw 6. The adjusting screws 8 and 9 are received
in threaded bores 19 in the corresponding member and are adjustable
from outside.
The base member 1 is fastened to the chucking device by means of
projections 12 or the like.
Guide pins 7 are arranged in appropriate guide bores between the
base member 1 and the first guide member 2. These guide pins permit
a vertical movement of the first guide member 2 in axial direction
of the tightening screw 6 when the threaded ring 5 is turned.
If a fine adjustment is to be carried out, for example, from the
position shown in FIG. 2 into the position shown in FIG. 3 initially
the tightening screw 6 is loosened by an appropriate tool. Subsequently,
the threaded ring 5 is turned counter-clockwise until the first
guide member 2 has been raised to the desired extent. The adjusting
screws 8 are then turned in order to influence the tongue 10 and
to displace the guide member 3 in the desired direction in the plane
extending perpendicularly of the axis of the tightening screw 6.
In the same manner, the end member 4 is displaced by means of the
adjusting screws 9. When the end body 4 and the stop member, or
another component fastened thereto, has reached the desired position,
the tightening screw 6 is tightened.
It is readily apparent that the end member 4 and, thus, the piece
fastened thereto, can be adjusted very precisely into each desired
position to a certain extent. An exact movement in all three axial
direction Z, X and Y is possible.
Of course, individual guide means can be constructed differently.
Instead of the tongue and groove connections, other mechanical means
can be selected in order to ensure the movement in the appropriate
plane and in the desired direction.
FIG. 6 of the drawing shows another embodiment in which for the
movement in the Z-axis, a draw key 26 is provided instead of the
threaded ring 5 between the first guide member 2 and the base member
1. The base member 1 has a corresponding inclined surface 25. An
oblong hole 27 is provided in the draw key 26 wherein the tightening
screw 6 extends through the oblong hole 27. The draw key 26 is movable
back and forth in the direction of the oblong hole 27 by means of
an adjusting screw 28 which is screwed into a thread 29 in the first
guide member 2.
In the embodiment of FIG. 6 a larger contact area is made available,
so that tilting and wiggling are prevented. For carrying out the
adjustment in the Z-direction, i.e., in the axial direction of the
tightening screw 6 the adjusting screw 28 is turned and the draw
key 26 is displaced as a result. Because of the configuration as
an oblong hole 27 this movement is not impaired by the tightening
screw 6. The remaining components of the embodiment of FIG. 6 correspond
to those of FIG. 1.
While specific embodiments of the invention have been shown and
described in detail to illustrate the inventive principles, it will
be understood that the invention may be embodied otherwise without
departing from such principles. |