Chucks or sockets – Accessory or component – Tool or work stop or locator
Patent
1990-11-16
1992-08-11
Bishop, Steven C.
Chucks or sockets
Accessory or component
Tool or work stop or locator
2791051, B23B 31107
Patent
active
051372894
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Technical Field
The present invention relates to a chuck with a fixation part and a shank connected with this, with an axially located cylindrical opening to hold the fixation lug of a tool, with a stop piece to adjust the penetration depth of the fixation lug of the tool into the opening.
2. Background Art
In prior art chucks, e.g. according to DIN 1835, Form E, the penetration depth of a tool provided with a cylindrical fixation lug into an axially located cylindrical opening of the chuck is adjusted, to position the tool exactly, with a stop which protrudes into said opening from the rear and is adjustable via a thread. The positioning of the tool is usually carried out in a pre-setting device fitted with a ground glass disk. In order to adjust said stop, the chuck must each time be removed from the pre-setting device and inserted again, an action which must be repeated several times until the tool held by the chuck is in the required position.
DISCLOSURE OF INVENTION
It is an object of the present invention to eliminate these disadvantageous, time-consuming actions when positioning the tool in the chuck.
In a chuck as mentioned at the beginning, this is achieved according to the invention by means for adjusting the stop piece from the side of the chuck .
BRIEF DESCRIPTION OF THE DRAWINGS
An embodiment example of the invention and its application will be described in the following in more detail with reference to the accompanying drawing. The figures show:
FIG. 1 a view of the chuck,
FIG. 2 a sectional view taken along the line II--II of FIG. 1,
FIG. 3 is a sectional view taken along the line III--III of FIG. 2,
FIG. 4 is a sectional view taken along the line IV--IV of FIG. 2.
BEST MODE FOR CARRYING OUT THE INVENTION
The chuck 1 for holding a tool is clamped in a holding spindle 2. The chuck substantially comprises a fixation cone 3 and a shank 4 with an opening 41 to hold the fixation lug 5 of a tool 6, and a middle part 7 lying between the fixation cone and shank 4. Two stop screws 8 and 9 are positioned in the shank 4 to stop the fixation lug 5 of the tool 6 in the shank 4. In an axial bore 10 of the chuck a cylinder shaped stop piece 11, with a front stop part 12, which protrudes into the opening 41 from the rear, and a back stop part 13, is movably located. In the area of the front stop part the cylinder shaped stop piece 11 is provided with a rack-like arranged toothed member 14. The front stop part 12 serves to position the tool exactly. An adjustment shaft 16 is mounted in a bore 16 located at right angles to the longitudinal axis of the chuck, the adjustment shaft having on its circumference a toothed member 17 which engages with the rack-like tooth member 14 of the stop piece 11. The adjustment shaft is provided at one end with a hexagonal inner bore 18 so that the adjustment shaft can be adjusted from the exterior with a wrench for socket head cap screws. A core bore 19 for the rear stop piece 13 is embossed with a square stamp, as indicated by the broken line 20. Furthermore, in the rear part of the fixation cone 3, is located a bore 21 provided with a thread which serves to screw in an end stop 22, with which the rearward position of the cylinder shaped stop piece 11 can be limited, so that the two toothed member 14 and 17 cannot come together unless engaged. The end stop 22 can be screwed into the fixation cone 3 from the rear and reaches the stop at a surface 23.
FIG. 2 shows a section along line II--II of FIG. 1. This FIG. also shows the sealing ring 24 which seals the stop piece, necessary when a cooling agent is used.
FIG. 3 is a section along line III--III of FIG. 2. It shows the rear stop part 13 which is inserted so that it cannot turn in the core bore 19 which is embossed with a square stamp, so that the two toothed members 17 and 14 are always engaged with each other.
FIG. 4 shows a cross-section taken along line IV--IV of FIG. 2. As shown in this FIG., The adjustment shaft 16 is mounted in two ball bearings 24 and 25 with balls 26 and 27.
REFERENCES:
patent: 3202433 (1965-08-01), Davis
patent: 3677560 (1972-07-01), Clarkson
patent: 3711105 (1973-01-01), Johanson
patent: 3719367 (1973-03-01), Baturka
patent: 4668138 (1987-05-01), Carter
patent: 4815347 (1989-03-01), Rogers
Bishop Steven C.
Fabel Holding AG
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