JPS60180704A - Chip breaker holder - Google Patents

Abstract

PURPOSE:To automatically tear chips continuously extending during cutting operation by providing a plurality of cam recesses for increasing or decreasing depth of fitting of a shank shaft on the output side in relation to a rotary shaft coupling of a machine tool such as a drill. CONSTITUTION:In a chip breaker holder, a fixed cylinder 1 is held nonrotatably, and rotation of a shank shaft 5 on the input side causes unitary rotation of a rotary shaft coupling 4 and a shank shaft 7 on the output side, and at every three-quarter rotation of the shafts 5 and 7, a cam recess 19 of an annular concave surface 18 comes to the location of a steel ball 16, and the shaft 7 biased by a spring 11 is pused by the spring 11 to the left in proportion to the depth of the recess 19 and slides slightly to momentarily detach a cutting tool such as a drill from the cutting position and thereby to tear chips. The device thus constructed is effective to automatically tear chips continuously extending during cutting operation. Furthermore, as the device has a simplified structure, it can be manufactured at a low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a tool that is installed between a rotating shaft of a machine tool such as a drill and a cutting tool such as a drill that rotates as a result of the rotating shaft of a machine tool such as a drill.
The present invention relates to a chip breaker holder that can automatically shred continuous chips by causing a rotating cutting tool to undergo shock sliding in the axial direction.

Chips generated when cutting with a drill are continuously discharged from the cut end and at the same time try to rotate with the drill, which poses a drawback that poses a danger to the work.Therefore, various improvements have been made to conventional cutting machines. However, the disadvantage was that the structure was complex and expensive.

In order to eliminate the above-mentioned conventional drawbacks, the present invention provides a fixed cylinder having a cylindrical inner surface and non-rotationally supported on the fuselage body, in which a cylindrical rotary shaft joint is rotatably fitted, and this rotary shaft An input side shank shaft, which is detachably connected to a rotating shaft of a drill or the like, is fixed to the outer end of the joint, while an output side shank 11 is used to attach or detach a cutting tool such as a drill from the other end of the fixed cylinder.
11 coaxially, a bottle joint that fits inside the shank shaft, and a spring that biases the inner end in the insertion direction are provided, and the shank shaft on the output side is connected to the rotary shaft joint. are connected to allow slight sliding in the axial direction, and fitted with a flexible retainer in which multiple steel balls are arranged at equal intervals relative to the fixed part internal pressure 1 in the circumferential direction and are held rotatably. The surface of each of the steel balls is defined by an annular concave surface formed at the inner end periphery of the rotary shaft joint, and another annular concave surface formed at the intermediate periphery of the output side shank shaft opposite to this annular concave surface. While the shank shaft on the input side is rotating, each steel ball is simultaneously placed in contact with the three faces of the concave surface and the cylindrical inner surface of the fixed cylinder, and on either one of the two opposing annular concave surfaces. A chip breaker holder that automatically shreds chips during cutting by forming multiple cam recesses that can be fitted in and out to increase or decrease the fitting depth of the output side shank shaft with the rotary shaft joint. The structure is simple and can be provided at low cost, and
It is made easy to use.

Embodiments of the present invention will be described below with reference to the drawings.

In the figure, (1) is a fixed cylinder that is non-rotatably supported by bringing the stop lever (2) protruding toward the - side into contact with the body of the machine tool, and (3) is a fixed cylinder that is formed and fitted into this fixed cylinder (fl). (5) is the shank shaft at the input end that is removably fixed to the outer end surface (1illI on the left in the figure) of the rotary shaft joint (4) via a screw (6). 5)
is removably connected to the rotating shaft of the drill. (7) is inserted from the other end of the fixed tube (1), and the inner end (8i 4cI
The output shaft (shank shaft of 1, (9) fitted to g1 rotating shaft joint (4) was cut along the axial direction from the 411 outer end surface of the rotating 44Hm hand (4) to form a pair in the diametrical direction. The long hole, Ql, connects the inner end (8) of the shank shaft (7) on the output side to +
The bottle joints Oυ penetrate AiC and fit into the full length holes (9) at both ends, respectively, from the inner ends of the pair of long holes (9) along the axial direction within the thickness of the rotary shaft joint (4). It is fitted into the drilled round hole α2 together with a pair of spring receivers θ (to) and presses both ends of the bottle joint α@, and the output side shank shaft (7) is connected to the inner end t8 via the bottle joint fII. ), the pair of springs I11-$, which are biased in the insertion direction, are connected to the inner surface formed between the outer end surface of the rotary shaft joint (4) and the inner end surface of the shank shaft (5) on the input side. End (8)
With a sliding clearance of , the rotation of the rotating shaft joint (4) is transmitted to the output side shank shaft (7) by the elongated hole (9), the pin joint αυ, the spring aυ, and the sliding clearance αa. At the same time, they are connected to allow slight sliding in the axial direction. a9 is an annular retainer fitted approximately in the center of the fixed cylinder (1), and α0 is this retainer (19&), which is rotatably held at equal intervals in the circumferential direction.
αη is an annular concave surface formed on the periphery of the inner end of the rotary shaft joint (4), and the α barrel is arranged to face the annular concave 1iQ71, and the intermediate portion of the shank shaft (7) on the output side It is an annular concave surface formed on the surface. The above three steel balls (formerly, the first
．． As shown in Figure 2, the front and back of each surface are sandwiched by the two annular four surfaces (In, Ql), and the outside is a fixed cylinder (1).
The planetary gear is brought into contact with the cylindrical inner surface (3) of the rotary shaft joint (4) as the output side shank shaft (7) of the rotary shaft joint (4) rotates. It revolves around itself while rotating in a shape. The handle is the output side shank shaft (7
) side, and the cam has four parts formed on the fcJii-shaped four-sided θ-shape at the same spacing as the arrangement spacing of the steel balls αQ. This cam recess Ql causes a delay in H rotation in the annular retainer based on the diameter difference between the annular concave surfaces an, am and the cylindrical inner surface (3), and thereby, during the rotation of the input side shank shaft (5). The steel balls ae are moved in and out at the same time, and the fitting depth of the shank shaft (7) on the exit side with respect to the rotary shaft joint (4) is increased or decreased. Ya is an oil supply ring attached to the fixed cylinder (1), and Qυ is an oil supply pipe.

This chip breaker holder configured as described above keeps the fixed cylinder +11 non-rotating, and when the shank shaft (5) of the input 1111 is rotated, the rotating shaft joint (4) and the output side shank shaft (7) rotate together. shank 1111 f5)
*Every 3/4 rotation in (7), the cam recess OI of the annular concave α frame aligns with the location of the steel ball, and the output side shank 4N11 t71, which is biased by the spring (1υ), reaches the depth of the cam four part OI. Accordingly, it slides slightly toward the left side in Fig. 1 under the pressure of a spring 0υ, and as a result, a cutting tool J (, such as a drill) momentarily moves r' from the cutting position, and the chips are broken up.

This chip breaker holder has the following features as shown in Figure 3.
The main body consists of a fixed cylinder (I), two rotary shaft joints (4), an input side shank shaft (5) a, a connection ring tl'lt, an oil ring @a, and an output side 1. By appropriately preparing the shank l11111 (7)a, it is possible to apply different fitting types.

The chip breaker holder of the present invention constructed as described above and used as described above has a simple structure and can be provided at low cost. In addition, it has the advantage of convenient operating pressure, high durability, and resistance to failure.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a partially cutaway side view thereof, FIG. 2 is a cross-sectional view taken along the line xx' in FIG. 1, and FIG. 3 is a fitting type diagram. FIG. 6 is a partially cutaway front view when attached to a different model. 1. Fixed tube, 2. Stop lever, 3. Cylindrical inner surface, 4. Rotating shaft joint, 5. Input 11117 Yank shaft, 6. Screw, 7. Output side shank shaft, 8. Inner end, 9...Long hole, 10...Pin joint, 11...Spring, 12
...Round hole, 13..Spring receiver, 14..Sliding clearance,
15...Concession retainer, 16...Steel ball, 17.18...
Hollow-like concave surface, 19...cam recess, 20 straight...oil supply ring,
21... Oil supply pipe, 5a... Input side shank shaft, 22 ・
・Connection ring, 20a...Oil supply ring, 7a...Output side shank shaft.

Claims (1)

[Claims] A cylindrical rotary shaft joint (4) is fitted into a fixed cylinder (11) having a cylindrical inner surface (3) and non-rotationally supported on the fuselage, and the outside of this rotary shaft joint (4) is At the end, there is an input side shank shaft (5
), while coaxially inserting the output side shank shaft (7) on which a cutting tool such as a drill is attached or removed from the other end of the fixed tube (1), and inserting the inner end of this shank shaft (7). Part (8
) is fitted into the rotary shaft joint (4), and a long hole (
9), a pin joint tlI that fits into this elongated hole (9),
Connect the shank shaft (7) on the output side to the inserting hand (4) so that it can slide slightly in the axial direction, and also insert the ladle end (8) into the fixed cylinder (1) in a circular manner. An annular retainer Q5 in which a plurality of steel balls 6G are arranged at equal intervals in the circumferential direction and held rotatably is fitted, and the surface of each steel ball QQ is
An annular concave surface αη formed on the periphery of the inner end of the rotary shaft joint (4), and the other annular concave surface (11) formed on the periphery of the intermediate portion of the output side shank shaft (7) opposite to this antic concave surface αη. , in contact with the cylindrical inner surface (3) of the fixed cylinder (11), and on either one of the two opposing annular-concave surfaces +171 Ql during rotation of the shank shaft (5) on the input side. A plurality of cam recesses (II) are formed in which each of the above-mentioned steel balls (119) is fitted in and out at the same time to increase or decrease the fitting depth of the output side shank shaft (7) with respect to the rotary shaft joint (4). A chip breaker holder featuring: