JPH01106109U

JPH01106109U -

Info

Publication number: JPH01106109U
Application number: JP44688U
Authority: JP
Priority date: 1988-01-05
Filing date: 1988-01-05
Publication date: 1989-07-17

Description

[Brief explanation of the drawing]

第１図は本考案にかかるドリルチヤツク機構の
好適な実施例を示す要部縦断面図、第２図は第１
図におけるチヤツクナツトシリンダ、切替カムリ
ング及び内歯リングの分解斜視図、第３，４，５
図はそれぞれ第１図の―，―，―断
面図、第６図は、第１図のスライドスリーブを後
退スライドさせた状態の要部縦断面図、第７，８
，９図はそれぞれ第６図の―，―，―
断面図、第１０図は従来のドリルチヤツク機構
の１例を示す一部破断図である。３０……ドリル軸、３２……チヤツクベース、
３２ａ……チヤツク爪ガイド溝、３２ｃ……内歯
部、３４……チヤツク爪、３４ａ……チヤツクね
じ、３６……チヤツクナツト、３８……チヤツク
ナツトシリンダ、４０……スライドスリーブ、４
２……切替カムリング、４４……内歯リング。 FIG. 1 is a longitudinal cross-sectional view of essential parts showing a preferred embodiment of the drill chuck mechanism according to the present invention, and FIG.
Exploded perspective view of the chuck nut cylinder, switching cam ring, and internal tooth ring in the figure, Nos. 3, 4, and 5.
The figures are sectional views -, -, - of Fig. 1, respectively. Fig. 6 is a longitudinal sectional view of the main part of the slide sleeve in Fig. 1 when it has been slid backward, and Fig. 7 and 8
, 9 are respectively -, -, - of Fig. 6.
10 is a partially cutaway view showing an example of a conventional drill chuck mechanism. 30...Drill shaft, 32...Chuck base,
32a...Chuck pawl guide groove, 32c...Internal tooth portion, 34...Chuck pawl, 34a...Chuck screw, 36...Chuck nut, 38...Chuck nut cylinder, 40...Slide sleeve, 4
2...Switching cam ring, 44...Internal tooth ring.

Claims

[Scope of Claim for Utility Model Registration] A chuck base fixed to a drill shaft and provided with a plurality of chuck pawl guide grooves, and a chuck base installed in the chuck pawl guide groove so as to be slidably guided at a predetermined inclination relative to the chuck base shaft. a plurality of chuck pawls each having a chuck screw provided on its outer periphery; and a plurality of chuck pawls mounted around the chuck base so as to be rotatable with the chuck base, and meshing with the chuck screws of the chuck pawls and thereby positioning the chuck pawls in a predetermined position relative to the chuck base axis. a chuck nut having a nut thread that reciprocates at an inclination of , a chuck nut cylinder integrally provided on the chuck nut, an internal tooth ring connected to the chuck base via a reduction mechanism, and an outer periphery of a drill chuck. a slide sleeve that is provided so as to be slidable in the axial direction and that includes a switching cam ring that is rotatable but not relatively movable in the axial direction; The switching cam ring has a locking portion that engages with and disengages from the chuck nut cylinder, and the switching cam ring engages with the chuck nut cylinder in the rotational direction and engages with and disengages from the inner tooth ring by axial movement by a slide sleeve. The chuck nut is fixed and held integrally with the slide sleeve at a position along the axial direction of the slide sleeve, and the chuck nut is quickly fed open and closed by rotation of the drill shaft, and Tightening in which the chuck nut is connected to the chuck base via a speed reduction mechanism at another position along the axial direction, and the chuck pawl is slowly tightened and driven by the boosted driving force by rotation of the drill shaft. A drill chuck mechanism characterized by the following actions.