JP7161555B2 - holder for cleaning - Google Patents

Description

TECHNICAL FIELD The present invention relates to a device that is inserted into and fixed to a tool holder fitting tapered hole formed at the tip of a spindle of a machine tool and that cleans the tapered hole and the tip surface of the spindle.

2. Description of the Related Art Conventionally, a technique described in Japanese Patent Application Laid-Open No. 10-043990 (Patent Document 1) is known as a device for cleaning the tip of a spindle of a machine tool. In the technique described in Patent Document 1, a tapered fixed side member is inserted into a taper hole for fitting a tool holder and fixed, and a coolant liquid is ejected from an ejection port provided in the fixed side member so that the coolant liquid flows into the tapered hole and the fixed side. Foreign matter adhering to the inner peripheral surface of the tapered hole is blown away by flowing through the gap between the members.

JP-A-10-043990

However, the inventors of the present invention have found that the conventional apparatus described above has points to be improved. That is, since the tapered stationary member is fixed to the coolant/air supply block via the connecting member, the stationary member itself does not rotate. Then, unless the main shaft of the machine tool is rotated, the coolant liquid does not spread over the entire circumference of the tapered hole.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an improved apparatus capable of cleaning a tool holder fitting taper hole of a spindle.

For this purpose, the cleaning holder according to the present invention comprises a rear tapered portion detachably fitted into a tapered hole provided in the tip surface of the spindle of a machine tool, and a shaft extending from the rear tapered portion to the tip side. a taper-shaped rotating member that is in the taper hole and is rotatably supported by the shaft; A supply passage, a rear intake port formed in the inner periphery of the rear end of the rotary member to take in fluid from the outer peripheral surface of the shaft, and a circumferential direction of the rear intake port in the outer periphery of the rear end of the rotary member. rear-end-side ejection port arranged at a position in the circumferential direction different from the position; Prepare roads.

According to this aspect of the invention, by feeding a fluid such as high-pressure air into the first fluid supply passage, the fluid then flows through the rear end-side ejection passage and imparts circumferential thrust to the rotating member, causing the rotating member to move. As it rotates, the fluid is then ejected from the rear end side ejection port to the tapered hole. Therefore, the fluid is evenly sprayed onto the inner peripheral surface of the tapered hole to clean the inner peripheral surface of the tapered hole. According to the present invention, the taper hole can be cleaned without rotating the spindle. Further, according to the present invention, it is possible to clean the tapered hole even in a rotating main shaft. The rear end ejection path may be a groove formed in the rear end surface of the rotating member, or may be a hole penetrating the rotating member.

As one aspect of the present invention, the rotating member further includes an inclined groove that is formed on the outer peripheral surface of the rotary member and extends obliquely from the rear end side to the front end side. According to this aspect, it is possible to apply a further rotational force to the rotating member and to smoothly discharge foreign matter adhering to the inner peripheral surface of the tapered hole. Preferably, the rear end of the inclined groove connects with the rear-end-side ejection port.

A further preferred aspect of the present invention further comprises a seal structure provided at the distal end of the rotating member or the distal end of the shaft for sealing the annular space between the inner peripheral surface of the rotating member and the outer peripheral surface of the shaft. According to this aspect, it is possible to prevent the fluid such as air ejected to the inner peripheral surface of the tapered hole from leaking while flowing to the ejection port.

As a preferred aspect of the present invention, the first fluid supply passage extends to the outer peripheral surface on the rear end side and the outer peripheral surface on the tip side of the shaft, respectively, and is formed on the inner periphery of the tip portion of the rotary member to supply the fluid from the outer peripheral surface on the tip side of the shaft. a tip-side intake port for taking in; a tip-side ejection port arranged at a circumferential position different from the circumferential position of the tip-side intake port on the outer circumference of the tip portion of the rotating member; and a passage formed in the rotating member. and a tip-side ejection path extending obliquely radially from the tip-side inlet to the tip-side ejection port. According to this aspect, it is possible to effectively clean the tip of the spindle. More preferably, the tip-side ejection port coincides with the tip surface of the main shaft. Also, the tip-side ejection path may be inclined with respect to the axis of the cleaning holder. As a result, the air ejected from the tip-side ejection port collides with the tip surface of the spindle, and the tip surface of the spindle can be cleaned efficiently.

As one aspect of the present invention, a flange portion is provided at the tip portion of the shaft and faces the tip surface of the spindle, and a spacer is detachably provided on the flange portion and adjusts the distance between the tip surface of the spindle and the flange portion. further provide. According to this aspect, the distance between the tip surface of the spindle and the flange portion is appropriately adjusted, so that the tip part of the spindle can be cleaned efficiently. As another aspect, spacers may not be provided.

The cleaning holder of the present invention can be supplied with fluid such as air from the fluid supply passage provided in the main shaft. Alternatively, as one aspect of the present invention, a flange portion provided at the tip portion of the shaft and facing the tip surface of the spindle, a holder tip portion provided at the tip side of the flange portion, and a second tip portion provided inside the holder tip portion. It further comprises a second fluid supply passageway connected to the first fluid supply passageway, an adapter connected to the distal end of the holder in a relatively rotatable manner, and a third fluid supply passageway provided in the adapter and connected to the second fluid supply passageway. . According to this aspect, even if the main shaft does not have a fluid supply passage, the tapered hole of the main shaft can be cleaned. Moreover, even if the spindle rotates carelessly, the tip of the holder only rotates, and the adapter does not rotate together. Therefore, damage to the cleaning holder is prevented.

As one aspect of the present invention, the cleaning holder includes a tapered extending portion erected on the flange portion and protruding toward the rear end side and having a tapered outer peripheral surface corresponding to the taper angle of the tapered hole; A plurality of grooves extending from the side to the rear end side and arranged at intervals in the circumferential direction, and a plurality of elongated holes arranged at intervals in the circumferential direction and elongated in the circumferential direction from the outer peripheral surface of the taper to the inner diameter side. A window portion that extends to penetrate the taper extension portion and connects to the tip side ejection port, and a through hole that is arranged between the window portions adjacent in the circumferential direction and extends from the taper outer peripheral surface toward the inner diameter side and extends to the taper extension portion. and a passageway extending through and connected to the distal spout. According to this aspect, the cleaning holder can be held straight in the correct posture in the waiting pot of the ATC (Automatic Tool Changer).

Thus, according to the present invention, it is possible to clean the tool holder fitting tapered hole without rotating the spindle.

1 is a longitudinal sectional view showing a cleaning holder according to one embodiment of the present invention; FIG. It is a side view which shows the same embodiment. It is a cross-sectional view showing the rear end side of the same embodiment. It is a cross-sectional view showing the distal end side of the same embodiment. FIG. 10 is a vertical cross-sectional view showing a cleaning holder that is a modified example of the present invention; FIG. 10 is a vertical cross-sectional view showing a tip end-side ejection path according to a first modified example of the present invention; FIG. 11 is a vertical cross-sectional view showing a tip end-side ejection passage that is a second modified example of the present invention; FIG. 10 is a vertical cross-sectional view showing a cleaning holder according to another embodiment of the present invention; FIG. 8 is a cross-sectional view showing a cross section taken along line VIII-VIII in FIG. 7;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail based on the drawings. FIG. 1 is a vertical cross-sectional view showing a cleaning holder according to one embodiment of the present invention. FIG. 2 is a side view showing the same embodiment. FIG. 3 is a cross-sectional view taken along section III-III through the rear end of the rotating member in FIG. 4 is a cross-sectional view taken along section IV-IV passing through the tip portion of the rotary member in FIG. 1. FIG. The cleaning holder 10 of the present embodiment includes a rear tapered portion 11, a shaft portion 12, a rotating member 21, and a flange portion 31, and is centered on the axis O. It is inserted into and fixed to the tapered hole 101 for fitting, and cleans the inner peripheral surface of the tapered hole 101. - 特許庁

The tapered hole 101 is a well-known one, and extends so as to recede from the tip surface 102 of the spindle 100, and the inner diameter becomes smaller toward the depth of the hole. In this specification, the deep hole side as seen from the tip surface 102 is called the rear end side, and the tip surface 102 side as seen from the deep hole is called the front end side.

The rear end tapered portion 11 has a tapered outer peripheral surface corresponding to the inner peripheral surface of the tapered hole 101 , and the tapered outer peripheral surface fits into the inner peripheral surface of the tapered hole 101 . It is detachably attached and fixed. Such mounting and fixing is performed by, for example, screwing a pull stud (not shown) into an internal thread 13 formed on the inner periphery of the center hole of the rear end tapered portion 11 and connecting this pull stud to the main shaft 100 .

The shaft portion 12 has an outer diameter smaller than that of the rear end tapered portion 11, is arranged coaxially with the rear end tapered portion 11, and extends from the rear end tapered portion 11 toward the front end side. An outer diameter portion of the distal end surface of the rear end tapered portion 11 excluding a central region where the shaft portion 12 is erected forms an annular distal end surface 17 . The shaft portion 12 is passed through the center hole 22 of the rotating member 21 . In the present embodiment, the rear end tapered portion 11 and the shaft portion 12 are formed as one member, but in a modification not shown, separate members may be connected to each other.

The rotating member 21 has an outer peripheral surface with the same taper angle as the rear end tapered portion 11, and has a larger diameter toward the tip side. However, since the outer peripheral surface of the rotary member 21 is slightly recessed from the outer peripheral surface of the rear end tapered portion 11, these tapered surfaces do not match. The rotary member 21 is arranged adjacent to the rear end side of the rear end tapered portion 11 and is inserted into the tapered hole 101 . A slight gap G<b>1 is defined by the center hole 22 of the rotating member 21 and the outer peripheral surface of the shaft portion 12 . The position of the gap G1 in the direction of the axis O overlaps the position of the tapered outer peripheral surface of the rotary member 21 in the direction of the axis O. As shown in FIG.

The flange portion 31 protrudes radially outward from the rotating member 21 . An annular V-shaped groove 32 and a notch 33 connected to the V-shaped groove 32 and arranged at a distance of 180° in the circumferential direction are formed on the outer periphery of the flange portion 31 .

A holder distal end portion 34 having a diameter smaller than that of the flange portion 31 is coaxially arranged on the distal end side of the flange portion 31 . Further, the tip portion 34 of the holder is integrally connected to the inner diameter portion of the flange portion 31 . A cavity is provided in the center of the flange portion 31, and a tip shaft portion 14 formed at the tip portion of the shaft portion 12 and extending further to the tip side is passed through the cavity. Mounted and fixed. Such attachment and fixation can be achieved, for example, by forming a male thread 15 on the outer periphery of the tip shaft portion 14 , forming a female threaded hole 35 in the center of the holder tip portion 34 , and screwing the female threaded hole 35 onto the male thread 15 .

As shown in FIG. 1, in a state in which the rear end tapered portion 11 is inserted deep into the tapered hole 101 and fixedly attached, the outer peripheral surface of the rotating member 21 and the inner peripheral surface of the tapered hole 101 are separated from each other by a gap G2. face to face. Further, the flange portion 31 faces the end surface 102 of the main shaft 100 via a gap G3.

A spacer 36 for adjusting the gap amount of the gap G3 may optionally be attached to the rear end surface 38 of the flange portion 31 . The spacer 36 of this embodiment is, for example, a flat annular thin plate that surrounds the axis O, and is screwed and fixed to the flange portion 31 by a plurality of countersunk screws that are spaced apart in the circumferential direction. The spacer 36 makes the gap G3 narrower than the gap between the tip surface 102 and the flange portion 31 . Since the spacer 36 is thinner than the space between the tip surface 102 and the flange portion 31 , a gap G3 is always created between the spacer 36 and the tip surface 102 .

The tip shaft portion 14 of this embodiment is formed to have a smaller diameter than the shaft portion 12 . A distal end portion of the rotating member 21 is a distal end cylindrical portion 23 having an inner diameter larger than the inner diameter of the central hole 22 . A bearing 24 is interposed between the tip cylindrical portion 23 on the outer diameter side and the tip shaft portion 14 on the inner diameter side. A bearing is, for example, a rolling bearing, and has an inner race, an outer race, and a plurality of balls (rolling elements) arranged between these races. Thereby, the rotating member 21 is stably supported by the tip shaft portion 14 .

An annular seal member 25 is arranged between the inner peripheral surface of the center hole 22 and the outer peripheral surface of the shaft portion 12 . The seal member 25 is arranged adjacent to the rear end side of the bearing 24 and seals an annular gap G1 between the shaft portion 12 and the rotary member 21 defined on the rear end side of the seal member 25 . As a result, the fluid flowing through the annular gap G1 does not enter the bearing 24. As shown in FIG.

Next, a structure for cleaning the inner peripheral surface of tapered hole 101 will be described.

A first fluid supply passage 16 is formed through the rear tapered portion 11 and the shaft portion 12 . The first fluid supply passage 16 constitutes the center hole of the rear end taper portion 11 and the shaft portion 12, extends to the rear end of the rear end taper portion 11, and is connected to a fluid supply passage provided inside the main shaft 100. . Further, the first fluid supply passage 16 branches into a plurality inside the shaft portion 12 and further extends to the outer diameter side. The branch passage 16 b is arranged at the rear end of the shaft portion 12 .

As shown in FIG. 3, the branch passages 16b of this embodiment are arranged at equal intervals in the circumferential direction, for example, four branch passages are provided at intervals of 90°. As shown in FIG. 1, the branch passage 16b has an inner diameter end connected to the first fluid supply passage 16 as a leading end, and an outer diameter end connected to the outer peripheral surface of the shaft portion 12 as a rear end. extends obliquely with respect to the axis O of the An outer diameter end of the branch passage 16b faces the inner peripheral surface (center hole 22) of the rotating member 21. As shown in FIG.

The rear end of the rotating member 21 is provided with an intake port 26b, a rear end side ejection path 26c, and an ejection port 26d. The intake port 26b is provided on the inner peripheral surface of the rotating member 21 . The ejection port 26 d is provided on the outer peripheral surface of the rotating member 21 . As shown in FIG. 3, the rear end side ejection path 26c extends from the intake port 26b to the ejection port 26d. The circumferential position of the intake port 26b and the circumferential position of the jet port 26d are different, and the rear end side jet passage 26c extends obliquely with respect to the radius of the rotating member 21. As shown in FIG. The rear end side ejection path 26c of the present embodiment is a groove carved in the rear end surface 27 of the rotating member 21. As shown in FIG. One or a plurality of rear end ejection passages 26c are provided, and in this embodiment, four are provided at equal intervals in the circumferential direction. The same applies to the intake port 26b and the ejection port 26d.

In addition, the rear end surface 27 is not a plane perpendicular to the axis O, but a substantially flat tapered surface, and more specifically, has a tapered shape with a predetermined taper angle. The annular distal end surface 17 of the rear end tapered portion 11 facing the rear end surface 27 via a gap is also formed into a tapered hole having a taper angle corresponding to the taper angle of the rear end surface 27 . Then, as shown in FIG. 2, the trailing end face 27 enters the annular leading end face 17 . Regarding the position in the direction of the axis O, the intake port 26b is located on the rear end side of the outer diameter end of the branch passage 16b.

Next, the operation of the rotating member 21 and the rear end side ejection passage 26c will be described.

When high-pressure air or fluid such as coolant is supplied from the spindle 100 to the inner part of the tapered hole 101, the air first flows along the first fluid supply passage 16, then along the branch passage 16b, and rotates. The fuel is jetted obliquely toward the rear end to the rear end of the gap G1 between the member 21 and the shaft portion 12 . As a result, the annular gap G<b>1 is filled with air, and the rotary member 21 is lifted from the shaft portion 12 .

Subsequently, the air moves to the rear end side, is taken into the intake port 26b, advances through the rear end side ejection path 26c, and is ejected from the ejection port 26d. The ejected air passes through the gap G2 between the rotating member 21 and the tapered hole 101 and cleans the inner peripheral surface of the tapered hole 101 . Further, the high-pressure air imparts circumferential thrust to the rotating member 21 from the rear-end-side ejection passage 26c when traveling through the rear-end-side ejection passage 26c. As a result, the rotary member 21 rotates, and air is evenly blown to the entire circumference of the tapered hole 101 . After that, the air passes through the gap G3 between the tip surface 102 and the flange portion 31 and flows out in the outer diameter direction while cleaning the tip surface 102 of the spindle 100 .

According to this embodiment, the inner peripheral surface of the tapered hole 101 can be cleaned over the entire circumference without rotating the main shaft 100 . Further, according to this embodiment, the fluid supplied from the spindle 100 can be used to remove foreign matter attached to the inner peripheral surface of the tapered hole 101 .

Further, the rear end surface 27 of the rotating member 21 is tapered, and the ejection path 26c extends obliquely with respect to the axis O, and is inclined toward the tip side toward the outer diameter side. Air can flow so as to follow the surface, and the inner peripheral surface of the tapered hole 101 can be effectively cleaned.

Moreover, the gap G3 is narrowed by providing the spacer 36 . As a result, the internal pressure of the fluid flowing through the gaps G1 to G3 increases, and the tip of the spindle can be effectively cleaned.

As shown in FIG. 2, the tapered outer peripheral surface of the rotary member 21 may be further provided with an inclined groove 51 . The inclined groove 51 has a rear end and a front end at different positions in the circumferential direction, and is inclined with respect to the axis O. As shown in FIG. This inclination is in the same direction as the inclination of the rear end side ejection passage 26c (clockwise/counterclockwise). The inclined groove 51 of this embodiment is connected to the ejection port 26d at the rear end. By further providing the inclined grooves 51, a further rotational force is imparted to the rotating member 21, thereby realizing smooth removal of the foreign matter.

Next, a structure especially provided for cleaning the tip surface 102 of the spindle 100 will be described.

The first fluid supply passage 16 branches into a plurality inside the tip portion of the shaft portion 12 . Such a branch passage 16c extends from the axis O to the outer diameter side.

As shown in FIG. 4, the branch passages 16c of this embodiment are arranged at equal intervals in the circumferential direction, for example, four branch passages are provided at intervals of 90°. Further, as shown in FIG. 1, the branch passage 16c extends in a direction orthogonal to the axis O of the cleaning holder 10 with an inner diameter end serving as an inlet and an outer diameter end serving as an outlet. The outer diameter end of the branch passage 16c connects with the annular groove 28. As shown in FIG.

The annular groove 28 is provided along the annular gap between the shaft portion 12 and the rotating member 21 . Although the annular groove 28 of this embodiment is formed on the inner peripheral surface of the rotating member 21 , the annular groove may be formed on the outer peripheral surface of the shaft portion 12 as a modified example (not shown).

The rotating member 21 is provided with a tip-side ejection path 29c that extends radially from the annular groove 28, penetrates the rotating member 21, and is connected to the outer diameter surface of the rotating member 21. As shown in FIG. An inner diameter end of the tip-side ejection passage 29c is called an intake port 29b, and an outer diameter end of the tip-side ejection passage 29c is called an ejection port 29d. The intake port 29b, the tip-side ejection path 29c, and the ejection port 29d are provided at the tip of the rotating member 21. As shown in FIG.

As shown in FIG. 4 , the circumferential position of the intake port 29 b is different from the circumferential position of the jet port 29 d , and the distal end side jet passage 29 c extends diagonally with respect to the radius of the rotating member 21 . Such inclination is clockwise or counterclockwise when viewed in the direction of the axis O, which is the same direction as the inclination of the rear end side ejection passage 26c. The tip end side ejection passages 29c of the present embodiment are one or a plurality of holes, and in the present embodiment, four holes are provided at regular intervals in the circumferential direction. The same applies to the intake port 29b and the ejection port 26d.

With respect to the axis O, each tip end ejection passage 29c may be perpendicular to the axis O as indicated by the dashed-dotted circle in FIG. As in a modification, each tip-side ejection path 29c may extend obliquely. In the modification shown in FIG. 6A, 29c inclines toward the rear end toward the outer diameter side. Alternatively, in the modification shown in FIG. 6B, 29c is inclined toward the tip side as it goes to the outer diameter side.

Specifically, for example, the distal end side ejection passages 29c and 29d adjacent in the circumferential direction may alternately incline toward the distal end side and the rear end side.

As shown in FIG. 1, in a state in which the rear end tapered portion 11 is inserted into the deep hole of the tapered hole 101 and fixedly attached, the position of the ejection port 29d in the direction of the axis O is aligned with the front end surface 102 of the spindle 100 and the flange portion 31. coincides with the gap G3 of .

Next, the operation of the rotating member 21 and the tip end side ejection path 29c will be described.

When high-pressure air or fluid such as coolant is supplied from the fluid supply passage provided in the spindle 100 to the inner part of the tapered hole 101, the air first flows along the first fluid supply passage 16, and then branches off. It flows along the passageway 16c and into the annular groove 28. As shown in FIG. A sealing member 25 is arranged on the distal end side of the annular groove 28 . This makes it difficult for the air in the annular groove 28 to leak to the tip side.

Subsequently, the air is taken into the intake port 29b from the annular groove 28, advances through the tip-side ejection path 29c, and is ejected radially from the ejection port 29d. The ejected air passes through the gap G3 between the tip surface 102 and the flange portion 31 and cleans the tip surface 102 of the spindle 100 . Also, the high-pressure air imparts a circumferential force to the rotating member 21 as it advances through the tip-side ejection passage 29c. As a result, the rotating member 21 rotates, and air is evenly blown to the entire circumference of the tip surface 102 . The air that has cleaned the tip surface 102 flows over the flange portion 31 in the radial direction.

According to this embodiment, the tip end surface 102 of the spindle 100 can be cleaned over the entire circumference without rotating the spindle 100 . Further, as shown in FIGS. 6A and 6B, according to the ejection path 29c inclined toward the rear end side and/or the front end side, the front end surface 102 of the spindle 100 can be sufficiently cleaned.

Next, modified examples of the present invention will be described. FIG. 5 is a longitudinal sectional view showing a modification of the invention. In this modified example, the same reference numerals are given to the configurations common to the above-described embodiment, and the description thereof is omitted, and the different configurations are described below. In the cleaning holder 20 of the modified example, a cylindrical adapter 41 is provided on the outer periphery of the holder tip portion 34 described above. A bearing 42 is interposed between the inner peripheral surface of the adapter 41 and the outer peripheral surface of the holder tip portion 34 . As a result, the holder tip portion 34 , the flange portion 31 , the shaft portion 12 , and the rear end tapered portion 11 are rotatable with respect to the adapter 41 . In this embodiment, the bearings 42 are provided at the rear end and the front end of the adapter 41 at intervals in the direction of the axis O, respectively.

A socket-shaped connection portion 43 into which a connector 44 is inserted and removed is provided at one circumferential location of the adapter 41 . A third fluid supply passage 45 is internally provided from the connecting portion 43 to the inner peripheral surface of the adapter 41 . The connector 44 has a fluid supply passage in the center, is connected to a fluid supply device (not shown) with a hose or the like, and is supplied with fluid such as air or coolant liquid from the fluid supply device.

The connecting portion 43 incorporates an on-off valve for opening and closing the third fluid supply passage 45, and the third fluid supply passage 45 is opened at the connecting portion 43 by inserting and fixing the connector 44 into the connecting portion 43. and the third fluid supply passage 45 communicate with each other. Alternatively, the third fluid supply passage 45 is closed at the connecting portion 43 by pulling out the connector 44 from the connecting portion 43 .

The third fluid supply passage 45 extends to the inner peripheral surface of the adapter 41 and connects with an annular groove 46 formed in the inner peripheral surface or the outer peripheral surface of the holder tip portion 34 . On the other hand, the first fluid supply passage 16 extending from the shaft portion 12 to the tip shaft portion 14 is connected to a second fluid supply passage 37 provided inside the holder tip portion 34 . The second fluid supply passage 37 extends in the direction of the axis O, one end is connected to the first fluid supply passage 16 at the tip shaft portion 14, changes direction halfway and extends in the direction perpendicular to the axis O, and the other end is the tip of the holder. It is provided on the outer peripheral surface of the portion 34 and connects with the annular groove 46 at the other end. The annular groove 46 of this embodiment is arranged in the central portion of the adapter 41 in the direction of the axis O. As shown in FIG. Seal members 47, 47 are provided on the rear end side and the front end side of the annular groove 46, respectively. Each seal member 47 seals against fluid leakage from annular groove 46 to bearing 42 .

Next, the operation of the modified example shown in FIG. 5 will be described.

First, a fluid such as high-pressure air is supplied from the connector 44 to the connection portion 43, passes through the third fluid supply passage 45, the annular groove 46, the second fluid supply passage 37, the first fluid supply passage 16, the branch passage It flows into 16b and 16c. The rest is as described above.

According to the modification shown in FIG. 5, the tip surface 102 of the main shaft 100 can be cleaned over the entire circumference without rotating the main shaft 100. Especially when the main shaft 100 does not have a fluid supply passage, Beneficial. Further, since the adapter 41 is rotatably attached to the holder tip portion 34, the cleaning holder 20 will not be damaged even if the main shaft 100 rotates due to an operator's mistake during the cleaning work.

Another embodiment of the present invention will now be described. FIG. 7 is a vertical cross-sectional view showing another embodiment of the present invention, and FIG. 8 is a cross-sectional view showing a cross section taken along line VIII--VIII in FIG. For other embodiments, the same reference numerals are given to the configurations common to the above-described embodiment, and the description thereof is omitted, and the different configurations are described below. Another embodiment of the cleaning holder 30 further comprises a tapered extension 52 , a groove 53 , a window 54 and a passageway 55 .

The tapered extension portion 52 has a tapered outer peripheral surface 56 that is erected on the rear end surface 38 of the flange portion 31 , protrudes toward the rear end side, and fits into the tapered hole 201 . The tapered outer peripheral surface 56 has a predetermined taper angle that tapers toward the rear end, and the predetermined taper angle is equal to the taper angle of the tapered hole 201 and the taper angle of the tapered hole 101 of the spindle described above. The tapered extension portion 52 of this embodiment has a ring shape coaxial with the axis O and is integrally coupled with the flange portion 31 . The tapered extending portion 52 surrounds the distal end portion of the rotating member 21 .

The groove 53 is formed in the tapered outer peripheral surface 56 and extends from the rear end of the tapered extension portion 52 to the rear end surface 33 of the flange portion 32, or connects with a window portion 54 or a passage 55, which will be described later. A plurality of grooves 53 of the present embodiment are arranged at intervals in the circumferential direction.

The window portions 54 are long holes that are arranged at intervals in the circumferential direction and are elongated in the circumferential direction. It can be connected to the tip side ejection port 29d. Further, the window portion 54 is connected to the gap G2 and the gap G3 while being inserted into the tapered hole 101 as shown in FIG.

The passage 55 is a through hole arranged between the windows 54, 54 adjacent in the circumferential direction, extends from the tapered outer peripheral surface 56 toward the inner diameter side, penetrates the tapered extended portion 52, and extends to the distal end side of the rotary member 21. It can be connected to the ejection port 29d. The passages 55 of this embodiment are arranged at equal intervals of 90°, like the tip-side ejection ports 29d.

As shown in FIG. 7, in a state where the cleaning holder 30 is held in a tapered hole 201 of a standby pot 200 of an ATC (Automatic Tool Changer), the rear end tapered portion 11 protrudes from the tapered hole 201 toward the rear end side, It may not fit with the tapered hole 201 . However, since the tapered extension 52 fits into the tapered hole 201 , the cleaning holder 30 is held in the correct posture within the tapered hole 201 .

Therefore, the cleaning holder 30 of this embodiment is correctly grasped by an arm 300 of an ATC (Automatic Tool Changer) as shown in FIG.

Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiment within the same scope as the present invention or within an equivalent scope. For example, a part of configuration may be extracted from one embodiment described above, another part of configuration may be extracted from another embodiment described above, and these extracted configurations may be combined.

INDUSTRIAL APPLICABILITY The present invention is advantageously used in machine tools.

10 cleaning holder, 11 rear end tapered portion, 12 shaft portion,
14 tip shaft portion (tip portion), 16 first fluid supply passage,
16b, 16c rear end side and tip side branch passages,
17 annular tip surface, 21 rotating member, 22 center hole,
25 sealing member, 26b, 29b rear end side and front end side inlets,
26c rear end side ejection path, 26d, 29d rear end side and front end side ejection ports,
27 rear end face of rotating member 28 annular groove 29c tip side ejection path
31 flange portion 34 holder tip portion 36 spacer
37 second fluid supply passage, 41 adapter, 43 connecting portion,
44 connector, 45 third fluid supply passage, 51 inclined groove,
52 taper extension portion 53 groove 54 window portion
100 Main shaft 101 Tapered hole 102 Tip surface
G1, G2, G3 clearance, O axis.

Claims (7)

A cleaning holder for cleaning the inner peripheral surface of a tapered hole extending backward from the tip surface of a spindle of a machine tool,
a rear end tapered portion detachably fitted into the inner part of the tapered hole;
a shaft portion extending from the rear end tapered portion toward the tip side;
a tapered rotary member which is located in the tapered hole and is rotatably supported by the shaft portion and extends from a region facing the inner peripheral surface of the tapered hole to a tip surface of the main shaft ;
a first fluid supply passage, which is a passage provided in the shaft portion and which supplies a fluid to the outer peripheral surface of the shaft portion;
a rear end intake port formed on the inner periphery of the rear end of the rotary member and taking in fluid from the outer peripheral surface of the shaft;
a rear-end-side ejection port arranged at a circumferential position different from the circumferential-direction position of the rear-end intake port on the rear-end portion outer circumference of the rotary member;
a passage formed in the rotary member, the passage extending obliquely radially from the rear intake port to the rear ejection port ;
the trailing end ejection path is formed between the tip end face of the trailing end tapered portion and the trailing end face of the rotary member;
a tip side intake port formed on the inner periphery of the tip portion of the rotating member to take in a fluid from the tip side outer peripheral surface of the shaft portion;
a tip-side ejection port arranged at a circumferential position different from the circumferential position of the tip-side intake port on the outer periphery of the tip portion of the rotating member;
A passage formed in the rotating member, which extends in an oblique radial direction from the tip side intake port to the tip side ejection port, and is inclined in the same direction as the inclination of the rear end side ejection passage. the cleaning holder further comprising a channel ; 2. The cleaning device according to claim 1, further comprising an inclined groove formed on the outer peripheral surface of said rotating member, extending obliquely from the rear end side to the front end side, and inclined in the same direction as the inclination of said rear end side ejection passage. holder for. 2. The sealing structure further comprising a seal structure provided at the distal end portion of the rotating member or the distal end portion of the shaft portion for sealing an annular space between the inner peripheral surface of the rotating member and the outer peripheral surface of the shaft portion. 3. The cleaning holder according to 2. 4. The cleaning holder according to any one of claims 1 to 3, wherein the tip-side jetting path is inclined with respect to the axis of the cleaning holder. a flange portion provided at the tip portion of the shaft portion and facing the tip surface of the main shaft;
5. The cleaning holder according to any one of claims 1 to 4 , further comprising a spacer detachably provided on said flange portion for adjusting the distance between said tip end surface and said flange portion. a flange portion provided at the tip portion of the shaft portion and facing the tip surface of the main shaft;
a holder tip portion provided on the tip side of the flange portion;
a second fluid supply passage provided inside the tip portion of the holder and connected to the first fluid supply passage;
an adapter connected to the distal end of the holder so as to be relatively rotatable;
The cleaning holder according to any one of claims 1 to 5 , further comprising a third fluid supply passage provided in said adapter and connected to said second fluid supply passage. a tapered extension portion erected on the flange portion, protruding toward the rear end side, and having a tapered outer peripheral surface corresponding to the taper angle of the tapered hole;
a plurality of grooves formed on the tapered outer peripheral surface, extending from the front end side to the rear end side, and arranged at intervals in the circumferential direction;
A plurality of elongated holes arranged at intervals in the circumferential direction and elongated in the circumferential direction, extending from the tapered outer peripheral surface to the inner diameter side, penetrating the tapered extended portion, and connecting to the tip side ejection port. Department and
Further provided is a through-hole arranged between the windows adjacent in the circumferential direction, the passage extending from the tapered outer peripheral surface toward the inner diameter side, penetrating the tapered extended portion, and connecting to the tip-side ejection port. A cleaning holder according to claim 5 or 6 .

Images