JPH0753874Y2 - Oil supply device in tool holder - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a tool holder for mounting a cutting tool on a spindle of a machine tool, and an oil supply device for supplying cutting oil from an oil passage on the machine tool side to a rotary cutting tool with an oil hole. The present invention relates to a tool holder equipped with.

[0002]

2. Description of the Related Art A rotary cutting tool with an oil hole cools and lubricates the cutting edge portion by pouring the cutting oil supplied to the oil hole from the cutting edge portion to perform cutting.
It is characterized by extending the useful life of the cutting tool and improving the finished surface.

In a conventional oil supply device for a tool holder of this type, as shown in FIG. 9, a non-rotating support member 3 for rotatably supporting a rotary shaft 1 is provided with an oil passage which will be described later and is attachable to and detachable from an oil supply table on the machine tool side. A connecting tool is integrally provided, and oil is passed through the oil path connecting tool and each oil supply path 6 of the non-rotational supporting member 3 to a tool supply path 7 formed on a rotary shaft, and the tool oil is supplied from the supply path 7. I try to refuel the hall.

At this time, since an oil supply passage is formed across the relative interface portion 8 between the non-rotating support member 3 in the non-rotating state and the rotating shaft 1 in the rotating state, oil leakage is prevented from occurring between the interfaces. Therefore, the oil-tight ring 5 is interposed between the two.

However, during a long use period,
Alternatively, cutting powder or the like mixed in the cutting oil is caught between the oil-tight ring 5 and the outer peripheral surface of the rotary shaft 1 with which the oil-tight ring 5 is in rotary contact, as shown by a chain double-dashed line H in FIG. On the outer peripheral surface of the rotary shaft with which the oil-tight ring 5 comes into contact, a dent is generated due to sliding frictional resistance of cutting powder or the like, the oil-tightness of the oil-tight ring is destroyed, and cutting oil (coolant) leaks from the dent, There have been many accidents in which the cutting oil penetrates into the bearing portions 2 and 2 provided with the oil supply passage sandwiched therebetween and damages the bearings 2 and 2.

In order to prevent this difficulty, the applicant of the present application has shown in the past that a non-rotating shaft 1 is rotatably supported by a rotating shaft 1 and a pair of bearings 2 and 2 as shown in FIG. It is proposed that a replaceable sleeve 4 is interposed between both bearings 2 and 2 between the supporting member 3 and an oil-tight ring 5 is interposed between the non-rotating supporting member 3 and the sleeve 4. .

With the configuration shown in FIG. 10, the cutting powder or the like mixed from the outside or in the cutting oil is oil-tight ring 5.
And the outer peripheral surface of the sleeve 4 which is in rotational contact with the oil tight ring 5, a recess is generated on the outer peripheral surface of the sleeve 4 with which the oil tight ring 5 comes into contact due to sliding friction resistance of cutting powder or the like, and the oil tight ring 5 is oil tight. If the property is destroyed, it is not necessary to replace the expensive rotary shaft 1 simply by removing the sleeve 4 from the rotary shaft 1 and replacing it, and the repair cost is reduced accordingly.

However, in the above-mentioned prior art, the non-rotational supporting member 3 is supported by the bearings 2 and 2, and is integrally formed with the above-mentioned oil passage connector, so that the sleeve 4 is formed.
All of them had to be disassembled and replaced at the time of replacement, and they had to be installed in their original states at the time of mounting, and the replacement work was still very troublesome.

[0009]

Therefore, according to the present invention, there is no hindrance to the refueling action during use, that is, without disassembling the non-rotating support member or the oil passage connector.
A first object of the present invention is to propose an oil supply device in a tool holder that does not hinder use by replacing only a worn portion.

Further, the present invention provides a tool holder oiling device which does not hinder the use of the non-rotating oiling ring even if the non-rotating oiling ring is slightly worn or disassembled without disassembling the non-rotating support member or the oil passage connector. The second purpose is to propose.

[0011]

According to a first aspect of the present invention, there is provided a rotating shaft 10 attached to a spindle of a machine tool, and a non-rotating support member 11 rotatably supporting the rotating shaft 10. In the tool holder, the non-rotating oil supply ring 1 is axially adjacent to the non-rotating support member 11 and communicates with a tool oil supply passage 12 provided in the rotating shaft 10.
3, the non-rotating oil supply ring 13 is provided with a lip 13a projecting to the rotating shaft 10 side, and the non-rotating oil supply ring 13 and the oil passage connector 14 on the machine tool side are connected to the oil passage pipe 1
5, the oil passage 16 of the oil passage connector 14 and the oil passage 17 of the non-rotating oil supply ring 13 are connected to each other by the oil passage 1 of the oil passage pipe 15.
8 is used for communication.

According to the second aspect of the invention, the drain 22 is provided between the non-rotating support member 11 and the non-rotating oil supply ring 13.
The configuration described in claim 1 is used.

In the invention according to claim 3, the drain 22 includes the non-rotating support member 11 and the non-rotating oil supply ring 13.
And (2) are provided separately, and the gap 22 is interposed between the two.

According to a fourth aspect of the invention, the structure according to the first aspect is adopted in which a removable sleeve 19 is interposed between the non-rotating oil supply ring 13 and the rotary shaft 10. .

In the invention according to claim 5, a pair of lips 13a, 13 is formed on the inner peripheral surface of the non-rotating oil supply ring 13.
a is integrally or separately provided, and both lip 13a, 1
The configuration according to claim 4 in which 3a is in close contact with the sleeve 19 is adopted.

According to a sixth aspect of the present invention, the non-rotating oil supply ring 13 is made of a hard synthetic resin material or gun metal material.

In the device according to the seventh aspect, the drain 22 includes the non-rotating support member 11 and the non-rotating oil supply ring 13.
Is integrally provided, and the passage 22 is provided between the two.

In the invention according to claim 8, the non-rotating oil supply ring 13 has an outer cover portion 11a integrally formed with the non-rotating support member 11 and the outer cover portion 11 thereof.
It is a separate member from a, and comprises the non-rotating oil supply ring member 13b which is supported on the inside thereof.

According to a ninth aspect of the present invention, the non-rotating oil supply ring member 13b is made of a hard synthetic resin material or a gun metal material.

In the invention according to claim 10, the non-rotating support member 11 and the non-rotating oil supply ring 13 are provided separately, and the non-rotating oil supply ring 13 and the oil passage connector 14 on the machine tool side are provided. The oil passage pipe 15 to be connected is detachably provided, and the configuration according to claim 3 is adopted.

According to the eleventh aspect of the present invention, the non-rotating support member 11 and the non-rotating oil supply ring 13 are provided separately, and the non-rotating oil supply ring 13 and the oil passage connector 14 on the machine tool side are provided. The connecting oil pipe 15 is detachably provided, and the rotating shaft 10 is provided between the non-rotating oil supply ring 13 and the rotating shaft 10.
11. The structure according to claim 10 is adopted, which is integrally rotated with and has a sleeve 19 which is removable from the rotary shaft 10.

According to a twelfth aspect of the invention, an oil-tight ring 21 is interposed between the sleeve 19 and the rotary shaft 10 to adopt the structure of the eleventh aspect.

According to a thirteenth aspect of the present invention, the non-rotating oil supply ring 13 is non-rotatably supported by the oil passage connector 13 on the machine tool side via the oil passage pipe 15.
The configuration described is adopted.

In the invention according to claim 14, the non-rotating oil supply ring 13 is engaged with the non-rotating support member 11 by the engaging means 38,
The structure according to claim 3 is employed, which is engaged by 39 and is supported in a non-rotating state.

According to the fifteenth aspect of the invention, the cylinder body 11A formed on one side of the non-rotational support member 11 in the radial direction is fitted in the cylinder body 44 so that the cylinder body 44 can be inserted and removed in the axial direction. The cylindrical body 44 is formed so as not to rotate in the circumferential direction with respect to the cylinder portion 11A by the engaging portions 52 and 53 interposed between the cylindrical body 44 and the non-rotating oil supply ring 13 through the oil passage pipe 15. Since the holding member 41 for holding the non-rotating oil supply ring 13 in a fixed position is removed from the rotating shaft 10, the non-rotating oil supply ring 13, the sleeve 19, the oil passage pipe 15 and the tubular body 44 are rotated by the rotating shaft. 10 and the cylinder portion 11A can be extracted in the axial direction.

In the invention according to claim 16, the non-rotating oil supply support member 11 is integrally provided with an oil passage connector 14 that can be connected to an oil supply table 23 provided on the machine tool side.
When the oil passage connector 14 is not connected to the fueling table 23, the oil passage connector 14 regulates the rotary shaft 10 and the relative rotation of the both, and
When the oil passage connector 14 is connected to the fueling table 23, the relative rotation regulating means 31 for releasing the rotation of the rotary shaft 10 by releasing the mutual regulated state of the oil passage connector 14 and the rotary shaft 10 is provided. The configuration according to claim 1 is adopted.

[0027]

According to the first aspect of the invention, the rotary shaft 10 is attached to the spindle 48 of the machine tool, and the oil passage connector 14 for supporting the non-rotation support member 11 in the non-rotation state is the oil supply table on the machine tool side. By connecting to the rotary shaft 10
Is rotatably supported by the non-rotating support member 11,
The non-rotating oil supply ring 13 is supported by or engaged with the non-rotating support member 11, or is regulated by the oil passage connector 14 via the oil passage pipe 15 and is supported in a non-rotating state. The oil supply passage 17 of the rotary shaft 1 is connected to the oil passage 18 of the oil passage 15 and the oil passage 16 of the oil passage connector 14.
It is always in communication regardless of the rotation of 0, and therefore the oil passage connector 14 is connected to the oil supply table 23 so that the cutting oil (coolant) from the oil supply table 23 is transferred to the oil passage connector 14.
Oil passage 16, oil passage 18 of oil passage 15, oil passage 17 of non-rotating oil supply ring 13, and tool oil supply passage 1 of rotary shaft 10.
The oil will be supplied to the oil hole h of the tool T through the tool 2.

Non-rotating oil supply ring 13 after long-term use
, The non-rotating oil supply ring 13 was made of a hard resin, and the inner peripheral surface of the non-rotating oil supply ring 13 in contact with the side surface of the sleeve 19 was worn, and the oil tightness between them was slightly lost. In this case, only the non-rotating oil supply ring 13 needs to be replaced.

Therefore, it is not necessary to disassemble the non-rotating support member 11 supporting the rotating shaft 10 or the oil passage connector 14 integrally formed with the supporting member 11 from the rotating shaft 10.

The non-rotating oil supply ring 13 has a lip 13
Since a is projected toward the rotary shaft 10 side, if the pressure of the coolant is applied to the lip 13a, the lip 1a
Due to the pressure, 3a comes into close contact with the side surface of the sleeve 19 and the oil tightness between the two can be maintained more strongly.

According to the second aspect of the present invention, since the oil drain 22 is interposed between the non-rotating support member 11 and the non-rotating oil supply ring 13, the non-rotating oil supply ring 13 and the rotary shaft 10 are connected. The cutting oil leaking from between and is discharged to the outside from the drain 22 before reaching the bearing portion 25 of the non-rotating support member 11, and does not enter the bearing portion 25.

According to the third aspect of the present invention, even when the non-rotating oil supply ring 13 is worn due to long-term use and the oil tightness between the rotary shaft 10 and the non-rotating oil supply ring 13 is slightly lost. Since the drain gap 22 is interposed between the non-rotating support member 11 and the non-rotating oil supply ring 13, the cutting oil leaked between the non-rotating oil supply ring 13 and the rotary shaft 10 is
Before it reaches the bearing portion of the non-rotating support member 11, it is discharged from the drain gap 22 to the outside and does not enter the bearing portion 25, and the non-rotating oil supply ring 13 is provided separately from the non-rotating support member 11. Therefore, the material of the non-rotating oil supply ring 13 can be freely selected by changing the material of the non-rotating supporting member 11 and can be formed of, for example, a hard synthetic resin material or a gun metal material different from the rotating shaft 10. .

According to the fourth aspect of the present invention, since the removable sleeve 19 is interposed between the non-rotating oil supply ring 13 and the rotary shaft 10, if the sleeve 19 is worn during long-term use, Only the sleeve may be removed from the rotary shaft 10 and replaced with a new sleeve.

According to the invention of claim 5, a pair of lips 13a, 13a are provided on the inner peripheral surface of the non-rotating oil supply ring 13 so as to project, and both lips 13a, 13a come into close contact with the sleeve 19. Therefore, the oiltightness between them can be secured, and the pressure of the coolant supplied to the inner peripheral surface side of the non-rotating oil supply ring 13 causes the pressure on both lips 1 to increase.
3a and 13a are elastically deformed and come into close contact with the sleeve 19 strongly, so that the oil tightness between them can be further enhanced.

According to the invention of claim 6, since the non-rotating oil supply ring 13 which is separate from the non-rotating support member 11 is formed of a hard synthetic resin material or a gun metal material,
It is easy to process, can be manufactured at low cost, and it is possible to select a material with a small friction coefficient,
It can be used stably for a relatively long period of time and can rotate at high speed.

According to the invention of claim 7, even when the non-rotating oil supply ring 13 is worn down due to long-term use and the oil tightness between the rotary shaft 10 and the non-rotating oil supply ring 13 is slightly lost. Since the drain passage 22 is interposed between the non-rotating support member 11 and the non-rotating oil supply ring 13, the cutting oil leaked from between the non-rotating oil supply ring 13 and the rotary shaft 10 is
Before reaching the bearing portion 25 of the non-rotating support member 11, it is discharged from the drain passage 22 to the outside and does not enter the bearing portion 25. The non-rotating oil supply ring 13 is provided integrally with the non-rotating support member 311. Therefore, the non-rotating oil supply ring 13 is reliably supported by the non-rotating support member 11, and the structure is simple.

According to the invention of claim 8, the non-rotating oil supply ring 13 has an outer cover portion 11a formed integrally with the non-rotating support member 11 and the outer cover portion 11a.
Since it is formed separately from the non-rotating oil supply ring member 13a supported inside the non-rotating oil supply ring member 13a, when the non-rotating oil supply ring member 13a in direct contact with the rotary shaft 10 is worn, the non-rotating oil supply ring member Since it is not necessary to replace the entire 13 and only the non-rotating oil supply ring member 13a needs to be replaced, the cost is low.

According to the invention of claim 9, since the non-rotating oil supply ring member 13a is made of a hard synthetic resin material or a gun metal material, it is easy to process and can be manufactured at low cost, and friction is reduced. Since a material having a small coefficient can be selected, it can be used stably for a relatively long period of time and can rotate at high speed.

According to the present invention, the outer peripheral surface of the rotary shaft 10 and the non-rotating oil supply ring 13 are used for a long period of time.
The inner peripheral surface of the non-rotating oil supply ring 13 is abraded due to cutting debris entering between the non-rotating oil supply ring 13 and the non-rotating oil supply ring 13 and the non-rotating oil supply ring 13 is replaced. When it is necessary to move the non-rotating oil supply ring 13 along the outer peripheral surface of the rotating shaft 10 in a state where the removable oil passage pipe 15 is made to escape from the non-rotating oil supply ring 13 or the oil passage connector 14. It may be removed from the tool mounting portion 24 side.

That is, in this case, it is not necessary to disassemble the non-rotating support member 11 that supports the rotating shaft 10 or the oil passage connector 14 integrally formed with the supporting member 11 from the rotating shaft 10.

According to the eleventh aspect, the outer peripheral surface of the sleeve 19 and the non-rotating oil supply ring 1 are used for a long period of time.
When the outer peripheral surface of the sleeve 19 is worn due to cutting debris or the like that enters between the inner peripheral surface of 3 and a dent, the oil tightness between the two is lost and the sleeve 19 needs to be replaced. , The sleeve 19 together with the non-rotating oil supply ring 13 in a state where the detachable oil passage pipe 15 is made to escape from the oil passage connector 14.
May be moved along the outer peripheral surface of the rotary shaft 10 and removed from the tool mounting portion 24 side.

That is, also in this case, it is not necessary to disassemble the non-rotating support member 11 supporting the rotary shaft 10 and the oil passage connector 14 integrally formed with the non-rotary support member 11 from the rotary shaft 10.

The replaced new sleeve 19 is again mounted on the outer peripheral surface of the rotating shaft 10 together with the non-rotating oil supply ring 13, and the oil passage pipe 15 is connected to the oil passage connector 14 to thereby provide a series of oil supply. A passage is formed.

According to the twelfth aspect of the invention, since the oil-tight ring 21 is interposed between the sleeve 19 and the rotary shaft 10, it is possible to reliably prevent the coolant from entering the bearing 25 side. .

According to the thirteenth aspect of the present invention, the non-rotating oil supply ring 13 is supported by the oil passage connector 13 on the machine tool side in the non-rotating state via the oil passage pipe 15. A series of oil supply passages formed via 13 is reliably maintained.

According to the invention of claim 14, the non-rotating oil supply ring 13 is engaged with the non-rotating support member 11 by the engaging means 38, 3.
Since it is engaged by 9 and supported in a non-rotating state,
A series of oil supply passages formed via the non-rotating oil supply ring 13 is reliably maintained.

According to the fifteenth aspect of the present invention, the cylinder 44 is fitted into the cylinder portion 11A formed on the one side radial projection of the non-rotating support member 11 so that the cylinder body 44 can be inserted and removed in the axial direction. Engaging portions 52, 5 provided on the 11A side
3, the tubular body 44 is formed so as not to rotate in the circumferential direction with respect to the cylinder portion 11A, and is connected to the non-rotating oil supply ring 13 via the oil passage pipe 15 to the tubular body 44. By simply removing the holding member 41 that holds the non-rotating oil supply ring 13 in a fixed position from the rotary shaft 10, the non-rotating oil supply ring 13, the sleeve 19, the oil passage pipe 15
Also, the cylindrical body 44 can be axially extracted from the rotary shaft 10 and the cylinder portion 11A.

According to the sixteenth aspect of the invention, the non-rotating support member 11 is integrally provided with the oil passage connector 14 that can be connected to the oil supply table 23 provided on the machine tool side. When the oil passage connector 14 is not connected to the fueling table 23, the oil passage connector 14 regulates the rotary shaft 10 to each other to prevent relative rotation therebetween, and the oil passage connector 14 refuels. When the oil passage connector 14 and the rotary shaft 10 are connected to the platform 23, the relative rotation restricting means 31, 31 for releasing the rotation of the rotary shaft 10 by releasing the mutual restricted state of the oil passage connector 14 and the rotary shaft 10 are provided. The member 11 and the oil passage connector 14 integrated with the member 11 are fixed integrally with the rotary shaft 10 when the member 11 and the oil passage connector 14 are removed from the spindle 48 on the machine tool side.
It can be conveyed from the spindle 48 to the magazine without shaking, and can be accurately accommodated in the magazine.

[0049]

FIG. 1 shows an embodiment of the present invention in which a manipulator gripping portion 26 and a tapered shank portion 27 are concentrically formed at one end of a rotary shaft 10 and an oil is provided at the other end. The mounting portion 24 of the cutting tool with hole T is formed concentrically.

The rotating shaft 10 is rotatably supported by the non-rotating support member 11 via a bearing 25, and a rotation stopping mechanism is provided in the cylinder portion 11A formed on one side of the non-rotating support member 11 in the radial direction. The combined oil passage connector 14 is attached.

The oil passage connector 14 is provided in the cylinder portion 11A so as to be slidable in the direction parallel to the rotary shaft 10 and protrudes toward the shank portion 27. The rotation stopper member 31 is fixed between the outer end of the outer cylinder 28 and the lock nut 30 screwed into the inner cylinder 29. In addition, a spring 32a is provided inside the inner cylinder 29.
A check valve 32 including a spherical valve body 32b biased by the spring 32a so as to close the cylindrical opening 29a is mounted. The outer cylinder 28 is biased outward by a compression coil sprig 33, and the coil splint 3
3 is interposed between the end surface 34 of the outer cylinder 28 and the bottom surface of the cylinder portion 11A. As a result of the outer cylinder 28 being pushed outward by the urging force of the spring 33, the free end of the anti-rotation member 31 is provided on the rotary shaft 10 adjacent to the manipulator grip 26 in the unused state. The rotary shaft 10 and the non-rotational supporting member 11 are engaged with each other so that they cannot rotate relative to each other. Note that FIG. 1 shows a use state, in which the non-rotating support member 11, that is, the engagement state between the oil passage connector 14 and the rotating shaft 10 is released.

On the other hand, a non-rotating oil supply ring 13 is fitted on the rotating shaft 10 so as to be adjacent to the non-rotating supporting member 11. As for the mounting order, first, the thick-walled ring-shaped first sleeve 19a is externally fitted to the rotary shaft 10 and applied to the side surface of the contact plate 36 of the non-rotational support member 11. Next, the collar-shaped second sleeve 19b is externally fitted to the rotary shaft 10 and applied to the first sleeve 19a. In this state, the non-rotating oil supply ring 13 is connected to the first sleeve 19a
Outer fitting over the sleeve 19b, then the third sleeve 19c is fitted over the rotary shaft 10, and finally the nut 41
Is screwed into the rotary shaft 10 to prevent the non-rotating oil supply ring 13 from moving in the axial direction, and is attached so as to rotate only relative to the rotary shaft 10. The second sleeve 19b is directly fixed to the rotary shaft 10 by screws 19d. The first to third sleeves 19a to 19c form the sleeve 19.

As shown in FIGS. 1 to 4, the non-rotating oil supply ring 13 is provided with a pair of lips 13a, 13a on its inner peripheral surface so as to project to the outside in FIG. As shown, the pair of lips 13a, 13a are outwardly widened so that the facing distance between them is wide, and this is the sleeve 19
As shown in FIG. 3, the pair of lips 13a, 13a are fitted onto the rotary shaft 10 via the sleeve 1 so that the sleeve 1
The first and third side surfaces of both lips 13a and 13a are sandwiched between the first sleeve 19a and the third sleeve 19c.
The sleeves 19a and 19c are elastically deformed so as to be in close contact with the side surfaces thereof.

The non-rotating oil supply ring 13 is made of hard polyacetal resin, vinyl chloride, ABS resin, nylon,
Made of hard synthetic resin such as tetrafluoride resin,
A pair of lips 13a, 13a protruding from the inner peripheral surface side
The side surface of the sleeve contacts the sleeve 19 to ensure oil tightness between them. An annular oil supply passage 17 is formed on the inner peripheral surface of the non-rotating oil supply ring 13.
Both lips 1 by the pressure of the coolant supplied to the
3a and 13a are bent toward the side walls of the first and third sleeves 19a and 19c, as shown by the alternate long and short dash line in FIG. 2, so that further oil tightness between them can be ensured.

The non-rotating oil supply ring 13 has a portion 1 forming a pair of lips 13a, 13a as shown in FIG.
3b may be formed separately from the ring body 13c. In this case, the ring body 13c may be made of steel or iron, and the pair of lips 13a attached to the ring body 13c,
The portion 13b forming 13a can be formed of the hard synthetic resin described above.

The oil supply passage 17 communicates with a radial oil supply passage 12 provided in the rotary shaft 10 through a through hole 19e provided in the second sleeve 19b. An oil passage pipe 15 is provided in a radial direction on the side facing the passage connection device 14, and the tip end of the oil passage pipe 15 has an oil passage connection device 1
4 is connected to the connection hole 45 provided in the cylinder portion 11A.

To maintain the non-rotating state of the non-rotating oil supply ring 13, the non-rotating oil supply ring 13 is regulated by the oil passage connecting tool 14 by connecting the oil passage pipe 15 to the oil passage connecting tool 14 to prevent its rotation. It is supposed to block.

Further, as shown in FIG. 5, the cylinder portion 11
Therefore, the oil passage connector 14 is formed separately from the non-support member 11, and the two are integrally connected by bolts 49, 49. Therefore, in order to disassemble the non-rotating oil supply ring 13 from the rotary shaft 10, the nut 41 that locks the non-rotating oil supply ring 13 and the bolt 49 that connects the oil passage connector 14 and the non-rotating support member 11 are removed. Thus, the oil passage connector 14 can be removed from the non-rotating support member 11 together with the oil supply pipe 15, and the non-rotating oil supply ring 13 together with the third sleeve 19c can be easily extracted from the rotary shaft 11.

In the embodiment shown in FIG. 6 instead of the structure shown in FIG. 5, the oil passage pipe 15 projecting from the non-rotating oil supply ring 13 is urged by the spring 43 to move in a protruding manner.
It is adapted to retreat against the biasing force of the spring 43.
Then, when it is urged by the spring 43 and protrudes, it is connected to the oil passage 16 of the oil passage connector 14. In the embodiment shown in FIG. 1, the oil passage connector 14 is directly connected to the connection hole 45 provided in the cylinder portion 11A.
As shown in FIG. 7, the tip of the oil passage pipe 15 is fitted into the connection hole 45 provided in the cylindrical body 44 that is oil-tightly fitted to the outer peripheral side of the cylinder portion 11A of the oil passage connector 14, 14 may be connected to the oil passage 16, and since the cylindrical body 44 can move the outer peripheral surface of the cylinder portion 11A in the axial direction, the oil passage connector 1 of the oil passage pipe 15 is formed.
There is an advantage that the mounting position in the circumferential direction with respect to 4 can be adjusted.

Further, as shown in FIG. 8, the non-rotating support member 1
1. Cylinder part 11 formed on one side of the radial projection
A cylindrical body 44 is fitted into A so as to be removable in the axial direction,
By engaging the key groove 53 provided on the cylinder body 44 side with the key 52 provided on the cylinder portion 11A side, the cylinder body 44 is formed so as not to rotate in the circumferential direction with respect to the cylinder portion 11A. 44 is connected to the non-rotating oil supply ring 13 through the oil passage pipe 15. In addition,
An oil-tight ring may be interposed between the cylinder body 44 and the cylinder portion A.

As a result, the non-rotating oil supply ring 13, the sleeve 19 and the oil passage pipe 1 are simply removed by removing the nut 41 for holding the non-rotating oil supply ring 13 in a fixed position from the rotary shaft 10.
5 and the cylinder 44 can be axially extracted from the rotary shaft 10 and the cylinder portion 11A as shown by the arrow in FIG.

By thus disposing the non-rotating oil supply ring 13 axially adjacent to the non-rotating supporting member 11, the non-rotating supporting member 1 axially supported by the bearings 25, 25.
There is no need to disassemble 1 from the time of rotation 10, and the disassembling work can be performed quickly.

In the embodiment shown in FIG. 1, the non-rotating support member 11 and the non-rotating oil supply ring 13 are accurately in contact with each other, more precisely, the non-rotating support member 11 and the first sleeve 19a are in direct contact with each other. Moreover, since the oil-tight ring 21 is interposed between the first sleeve 19 and the rotating shaft 10, the coolant from the non-rotating oil supply ring 13 does not leak to the non-rotating support member 11 side.

Further, oil does not leak from between the first sleeve 19a and the non-rotating oil supply ring 13, but even if oil leaks from both of them unexpectedly, the non-rotating oil supply ring 13 and the non-rotating support member 11 will be separated from each other. Since a large gap 22 is provided between them, the oil leak is discharged to the outside through the gap 22 and does not enter the non-rotational support member 11 side.

Further, in the above embodiment, the non-rotating oil supply ring 13 is provided separately from the non-rotating support member 11 independently, but as shown in FIG. 7, the non-rotating support member 11 and the non-rotation oil supply ring 13 are provided. The ring 13 may be integrally provided. That is, the non-rotational support member 11 is extended in the axial direction, the non-rotational oil supply ring member 13b is attached to the inner peripheral side of the extension portion 11a, and the pair of lips 13a, 13a is projectingly provided on the sleeve 19 ( 19a, 19b, 19c) and the nut 41 to prevent the non-rotating refueling ring member 13a from moving in the axial direction so that the non-rotating oil supply ring member 13a can be attached only relative to the rotating shaft 10.

The non-rotating oil supply ring 13 of the embodiment shown in FIGS. 1 to 6 or the non-rotating oil supply ring member 1 shown in FIG.
In order to reduce friction between the non-rotating oil supply ring 13 and the non-rotating oil supply ring member 13a such that the inner peripheral surface of the non-rotating oil supply ring 13 or the non-rotating oil supply ring member 13a directly contacts the sleeve 19 as much as possible. By changing the materials of both, for example, the material of the non-rotating oil supply ring 13 is formed of gun metal or hard resin material with respect to the steel material of the rotating shaft 10, and as described above from the viewpoint of processing or manufacturing unit price, it is hard. A synthetic resin material is preferable.

Although not shown, the non-rotating oil supply ring 13 shown in FIG. 1 or the non-rotating oil supply ring member 1 shown in FIG.
An oiltight ring may be interposed on the inner peripheral surface of 3a.

The sleeve 19 is made of a general steel plate plated with chrome, made of hardened steel or cemented carbide, or coated with ceramics or titanium nitrite. It is preferably formed of an abrasive material.

In the inner peripheral surface of the sleeve 19, the bearing 25
On the side, an oil-tight ring 21 is attached so as to be in close contact with the outer peripheral surface of the rotating shaft 10, and the non-rotating support member 11 has an engaging projection 3
8 is formed (shown in FIG. 6), and the protrusion 38 is adapted to engage with the engaging recess 39 formed in the non-rotating oil supply ring 13. Therefore, the non-rotating oil supply ring 13 is engaged with the non-rotating support member 11 to maintain the non-rotating state.

In the apparatus having the above-described structure, when the tool holder is in use, the non-rotating support member 11 has the oil passage connector 14 which also serves as a rotation stopper, and the fixing portion 47 of the machine tool.
By being locked to the oil supply table 23 provided in (FIG. 1), the rotation preventing member 31 retracts against the biasing force of the coil spring 33, and the member 31 and the engaging groove 3 on the rotating shaft 10 side.
The engagement state with 5 is released, and the rotary shaft 10 is rotatably held. Therefore, while the rotary shaft 10 is supported by the non-rotary support member 11, a predetermined cutting process is performed by the rotary cutting tool T attached to the tool attachment portion 24 at the tip of the rotary shaft 10.

The cutting oil (coolant) sent out from the oil supply groove 23a of the oil supply table 23 pushes the check valve 32 open to open the oil passage 16 of the oil passage connector 14, the oil passage 18 of the oil passage 15, While passing through the oil supply passage 17 of the non-rotating oil supply ring 13 and the inner peripheral surface of the non-rotating oil supply ring 13 directly and oil-tightly contacts the outer peripheral surface of the rotary shaft 10, the oil-tightness is appropriately maintained,
Alternatively, while the relative interface between the non-rotating oil supply ring 13 and the sleeve 19 is oil-tightly maintained, the cutting oil is supplied to the rotating shaft 1
Oil is supplied to the oil hole h of the cutting tool T through the tool supply oil passage 12 on the 0 side, and the coolant is discharged from the tip end of the tool T.

At this time, the coolant is the non-rotation supporting member 1
There is a risk of leaking to the side of the bearing 25 that supports the bearing 1 and damaging the bearing 25. However, in the present invention, the drain 22 may be provided between the non-rotating oil supply ring 13 and the non-rotating support member 11 as needed. Therefore, even if the coolant unexpectedly flows out to the bearing 25 side, it is discharged from the drain 22 to the outside on the way, so that the coolant does not enter the bearing 25.

Further, in the embodiment shown in FIGS. 1 to 4,
On the inner peripheral surface of the non-rotating oil supply ring 13, a pair of lips 13a,
Since 13a is integrally or separately provided so as to project, the coolant is supplied to the inner peripheral surface side of the non-rotating oil supply ring 13 so that both lips 13a, 13a are pressurized by the pressure.
Is strongly pressed against the sleeve 19, and the oil tightness between the two can be secured more strongly.

During operation, the rotating shaft 10 and the sleeve 19 rotate, but the non-rotating oil supply ring 13 does not rotate. Therefore, the non-rotating oil supply ring 13 moves in the axial direction while the rotating shaft 10 rotates. However, as shown in FIG. 3, the contact portion 5 between the sleeve 19 and the non-rotating oil supply ring 13
The movement of the non-rotating oil supply ring 13 is blocked by 0,51.

Further, during a long period of use, cutting powder or the like mixed from the outside or in the cutting oil is caught between the side surface of the sleeve 19 and the non-rotating oil supply ring 13, and the non-rotating oil supply ring 13 and the sleeve 19 are engaged. When the oil-tightness between the cylinder part 11A and the cylinder part 11A is broken, in the embodiment shown in FIG. 1, the pair of bolts 49, 49 are removed as shown in FIG.
The oil passage pipe 15 and the non-rotating oil supply ring 13 can be separated by disassembling the non-rotating support member 11.
Further, in the embodiment of FIG. 6, the oil passage pipe 15 is retracted against the biasing force of the spring 43 to disconnect the oil passage pipe 15 from the oil passage connector 14, and the nut 41 is removed in this state. Only the non-rotating oil supply ring 13 or the sleeve 19 and the non-rotating oil supply ring 13 on the outer peripheral side thereof are removed integrally or separately from the tool mounting portion 24 side, and only the sleeve 19 is removed.
Alternatively, the fatigued oil-tight ring 20 may be replaced together if necessary.

That is, it is not necessary to disassemble the non-rotating support member 11 and the bearing 25 that supports the non-rotating support member 11 or the oil passage connector 14 integrated with the non-rotating support member 11 from the rotary shaft 10 at all. The work is very easy.

[0077]

According to the invention of claim 1, when the non-rotating oil supply ring 13 is worn due to long-term use, the non-rotating oil supply ring 13 is formed of a hard resin, for example, and the sleeve 19
If the side surface of the non-rotational oil supply ring 13 that is in contact with the side surface of the non-rotational oil supply ring 13 is worn and the oil-tightness between them is slightly lost, only the non-rotational oil supply ring 13 may be replaced.

Therefore, it is not necessary to disassemble the non-rotating support member 11 that supports the rotating shaft 10 or the oil passage connector 14 integrally formed with the supporting member 11 from the rotating shaft 10.

The non-rotating oil supply ring 13 has a lip 13
Since a is projected toward the rotary shaft 10 side, if the pressure of the coolant is applied to the lip 13a, the lip 1a
The pressure of 3a allows the 3a to come into close contact with the sleeve 19 side to further strongly maintain the oil tightness between the two, so that it can be used stably for a long period of time.

According to the second aspect of the present invention, the cutting oil leaked from between the non-rotating oil supply ring 13 and the sleeve 19 is discharged from the drain 22 to the outside before reaching the bearing portion 25 of the non-rotating support member 11. Therefore, the fail-safe function can be maximized without entering the bearing portion 25.

According to the third aspect of the present invention, the non-rotating oil supply ring 13 is worn out due to long-term use, and the sleeve 19
Even when the oil tightness between the non-rotating oil supply ring 13 and the non-rotating oil supply ring 13 is slightly lost, the cutting oil leaked from between the non-rotating oil supply ring 13 and the sleeve 19 reaches the bearing portion of the non-rotating support member 11. Is discharged to the outside from the drain gap 22 and does not enter the bearing portion 25, so that the fail-safe function can be maximized, and the non-rotating oil supply ring 13 is separated from the non-rotating support member 11. Since it is provided on the body, the material of the non-rotating oil supply ring 13 can be freely selected by changing it from the non-rotating support member 11, and is formed of, for example, a hard synthetic resin material or a gun metal material different from the rotating shaft 10. It can be manufactured easily.

According to the invention of claim 4, since the removable sleeve 19 is interposed between the non-rotating oil supply ring 13 and the rotating shaft 10, if the sleeve 19 is worn during long-term use, Only the sleeve needs to be removed from the rotary shaft 10 and replaced with a new sleeve, and since it is not necessary to replace the rotary shaft 10, the maintenance cost is low.

According to the invention of claim 5, a pair of lips 13a, 13a are provided on the inner peripheral surface of the non-rotating oil supply ring 13 so as to project, and both lips 13a, 13a come into close contact with the sleeve 19. Therefore, the oiltightness between them can be secured, and the pressure of the coolant supplied to the inner peripheral surface side of the non-rotating oil supply ring 13 causes the pressure on both lips 1 to increase.
3a and 13a are elastically deformed and come into close contact with the sleeve 19 strongly, so that the oil tightness between the two can be further enhanced, and stable use can be achieved for a long period of time.

According to the invention of claim 6, since the non-rotating oil supply ring 13 which is separate from the non-rotating support member 11 is formed of a hard synthetic resin material or gun metal material,
It is easy to process, can be manufactured at low cost, and it is possible to select a material with a small friction coefficient,
It can be used stably for a relatively long period of time.

According to the invention as claimed in claim 7, even when the non-rotating oil supply ring 13 is worn due to long-term use and the oil tightness between the rotary shaft 10 and the non-rotating oil supply ring 13 is slightly lost. The cutting oil leaking from between the non-rotating oil supply ring 13 and the rotary shaft 10 is discharged to the outside from the drain passage 22 before reaching the bearing portion 25 of the non-rotating support member 11, and enters the bearing portion 25. Without fail, the fail-safe function can be maximized, and since the non-rotating oil supply ring 13 is provided integrally with the non-rotating support member 11, the non-rotating oil supply ring 13 is not rotated. It is securely supported, and the structure is simple and can be manufactured at low cost.

According to the invention of claim 8, the rotary shaft 10
When the non-rotating oil supply ring member 13a that is in direct contact with is worn, there is no need to replace the entire non-rotating oil supply ring member 13, and it is sufficient to replace only the non-rotating oil supply ring member 13a.

According to the ninth aspect of the invention, since the non-rotating oil supply ring member 13b is made of a hard synthetic resin material or gun metal material, it is easy to process and can be manufactured at low cost, and friction Since a material having a small coefficient can be selected, it can be used stably for a relatively long period of time.

According to the invention of claim 10, the side surface of the sleeve 19 and the non-rotating oil supply ring 13 are used for a long period of time.
It is necessary to replace the non-rotating oil supply ring 13 because the inner peripheral surface of the non-rotating oil supply ring 13 is worn away due to cutting dust or the like entering between the side surface and If there is, the removable oil passage 15 is made to escape from the non-rotating oil supply ring 13 or the oil passage connector 14,
It suffices to move the non-rotating oil supply ring 13 along the outer peripheral surface of the rotary shaft 10 and remove it from the tool mounting portion 24 side, and the replacement work is as easy as that.

That is, in this case, it is not necessary to disassemble the non-rotating support member 11 supporting the rotary shaft 10 or the oil passage connector 14 integrally formed with the non-rotary support member 11 from the rotary shaft 10.

According to the eleventh aspect, the side surface of the sleeve 19 and the non-rotating oil supply ring 13 are used for a long period of time.
The sleeve 19 by cutting debris and the like that enter between the side surface of the sleeve 19 and
Alternatively, when the outer peripheral surface of the non-rotating oil supply ring 13 is worn away and the oil tightness between the two is lost and the sleeve 19 or the non-rotating oil supply ring 13 needs to be replaced, the removable oil passage pipe 15 is replaced with oil. The sleeve 19 together with the non-rotating oil supply ring 13 may be moved along the outer peripheral surface of the rotary shaft 10 and removed from the tool attachment portion 24 side in a state where the sleeve 19 is escaped from the road connector 14.

That is, also in this case, it is not necessary to disassemble the non-rotating support member 11 that supports the rotating shaft 10 and the oil passage connector 14 integrally formed with the supporting member 11 from the rotating shaft 10.

The replaced new sleeve 19 is again mounted on the outer peripheral surface of the rotary shaft 10 together with the non-rotating refueling ring 13, and the oil passage pipe 15 is connected to the oil passage connector 14, whereby a series of refueling is performed. Since the passage is formed, the replacement work is easy.

According to the invention of claim 12, since the oil-tight ring 21 is interposed between the sleeve 19 and the rotary shaft 10, it is possible to reliably prevent the coolant from entering the bearing 25 side. .

According to the invention of claim 13, the non-rotating oil supply ring 13 is supported by the oil passage connector 13 on the machine tool side in a non-rotating state via the oil passage pipe 15. A series of oil supply passages formed via 13 are reliably maintained and can be used stably.

According to the invention of claim 14, the non-rotating oil supply ring 13 is engaged with the non-rotating supporting member 11 by the engaging means 38, 3.
Since it is engaged by 9 and supported in a non-rotating state,
A series of oil supply passages formed through the non-rotating oil supply ring 13 is reliably maintained, and stable use is possible.

According to the fifteenth aspect of the present invention, the cylindrical body 44 is fitted in the cylinder portion 11A formed on the one side radial projection of the non-rotational support member 11 so as to be axially removable, and at the same time, between the both. The cylindrical body 44 is formed so as not to rotate in the circumferential direction with respect to the cylinder portion 11A by the engaging portions 52 and 53 interposed between the cylindrical body 44 and the non-rotating oil supply ring 13 through the oil passage pipe 15. Since the holding member 41 for holding the non-rotating oil supply ring 13 in a fixed position is removed from the rotating shaft 10, the non-rotating oil supply ring 13, the sleeve 19, the oil passage pipe 15 and the tubular body 44 are rotated by the rotating shaft. 10 and the cylinder portion 11A can be extracted in the axial direction.

According to the invention of claim 16, the non-rotating support member 11 is integrally provided with the oil passage connector 14 which can be connected to the oil supply table 23 provided on the machine tool side, and the oil passage connector is provided. When the oil passage connector 14 is not connected to the fueling table 23, the oil passage connector 14 regulates the rotary shaft 10 to each other to prevent relative rotation therebetween, and the oil passage connector 14 refuels. Since the oil passage connector 14 and the rotating shaft 10 are provided with relative rotation restricting means 31 for loosening the rotation of the rotating shaft 10 when the oil passage connector 14 and the rotating shaft 10 are connected to the table 23, the non-rotating support member 11 is provided. And the oil passage connector 14 integrated therewith are conveyed from the spindle 48 to the magazine in a fixed state integrated with the rotary shaft 10 without being shaken when the tool escapes from the spindle 48 on the machine tool side. And accurate for magazines It can be accommodated.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing another embodiment of the main part of the embodiment shown in FIG.

FIG. 3 is an enlarged view of a main part of FIG.

FIG. 4 is a diagram showing an operating state of FIG.

5 is a side view of FIG. 1. FIG.

FIG. 6 is a cross-sectional view showing a main part of another embodiment.

FIG. 7 is a cross-sectional view showing the main parts of another embodiment.

FIG. 8 is a cross-sectional view showing the main parts of another embodiment.

FIG. 9 is a sectional view showing a main part of a conventional example.

FIG. 10 is a sectional view showing a main part of a conventional example.

[Explanation of reference numerals] 10 rotating shaft 11 non-rotating support member 12 tool supply oil passage 13 non-rotating oil supply ring 13a lip 14 oil passage connection tool 15 oil passage pipe 16 oil passage 17 oil passage 18 oil passage

Claims (16)

[Scope of utility model registration request] 1. A tool holder comprising a rotating shaft 10 attached to a spindle of a machine tool, and a non-rotating supporting member 11 rotatably supporting the rotating shaft 10.
The rotation shaft 1 is axially adjacent to the non-rotation support member 11.
The non-rotating oil supply ring 13 that communicates with the tool oil supply passage 12 provided on
Is provided with a lip 13a projecting toward the rotating shaft 10, and the non-rotating oil supply ring 13 and the oil passage connector 14 on the machine tool side are connected by an oil passage 15 so that the oil passage 16 of the oil passage connector 14 does not rotate. An oil supply device in a tool holder configured to communicate with an oil supply passage 17 of an oil supply ring 13 via an oil passage 18 of the oil passage pipe 15. 2. The oil supply device for a tool holder according to claim 1, wherein a drain 22 is interposed between the non-rotating support member 11 and the non-rotating oil supply ring 13. 3. The drain 22 comprises a non-rotating support member 11
The refueling device for a tool holder according to claim 2, wherein the non-rotating refueling ring 13 and the non-rotating refueling ring 13 are separately provided, and the gap 22 is interposed therebetween. 4. The non-rotating oil supply ring 13 and the rotating shaft 10
The oil supply device for a tool holder according to claim 1, wherein a removable sleeve 19 is interposed between the oil supply device and the tool holder. 5. A pair of lips 13a, 13a are integrally or separately provided on the inner peripheral surface of the non-rotating oil supply ring 13 so as to project, and the lips 13a, 13a are in close contact with the sleeve 19. The oil supply device in the tool holder according to 4. 6. The oil supply device for a tool holder according to claim 3, wherein the non-rotating oil supply ring 13 is made of a hard synthetic resin material or a gun metal material. 7. The drain 22 comprises a non-rotating support member 11
The oil supply device for a tool holder according to claim 2, wherein the non-rotating oil supply ring 13 and the non-rotating oil supply ring 13 are integrally provided, and the passage 22 is provided between the two. 8. The non-rotating oil supply ring 13 has an outer cover portion 11a integrally formed with a non-rotating support member 11.
The oil supply device for a tool holder according to claim 7, further comprising a non-rotating oil supply ring member 13b supported inside the outer cover part 11a and the outer cover part 11a. 9. The oil supply device for a tool holder according to claim 8, wherein the non-rotating oil supply ring member 13b is made of a hard synthetic resin material or a gun metal material. 10. The non-rotating support member 11 and the non-rotating oil supply ring 13 are separately provided, and the non-rotating oil supply ring 13 is provided.
The oil supply device for a tool holder according to claim 3, wherein an oil passage pipe (15) for connecting the oil passage connector (14) on the machine tool side is detachably provided. 11. The non-rotating support member 11 and the non-rotating oil supply ring 13 are separately provided, and the non-rotating oil supply ring 13 is provided.
An oil passage 15 for connecting the oil passage connector 14 on the machine tool side to the machine tool side is detachably provided, and the non-rotating oil supply ring 13 and the rotating shaft 1 are provided.
The oil supply device for a tool holder according to claim 10, wherein a sleeve 19 which rotates integrally with the rotary shaft 10 and is detachable from the rotary shaft 10 is interposed between the sleeve 19 and 0. 12. The oil supply device for a tool holder according to claim 11, wherein an oil-tight ring 21 is interposed between the sleeve 19 and the rotary shaft 10. 13. The non-rotating oil supply ring 13 is the oil passage pipe 1.
4. The oil supply device for a tool holder according to claim 3, wherein the oil supply connection device 13 on the machine tool side is supported in a non-rotating state via 5. 14. The oil supply device in a tool holder according to claim 3, wherein the non-rotating oil supply ring 13 is engaged with the non-rotating support member 11 by engaging means 38, 39 and is supported in a non-rotating state. 15. A cylinder part (11A) formed on one side of a non-rotational support member (11) in a radial direction is fitted with a cylinder body (44) so as to be able to be inserted and removed in the axial direction, and an engagement part (52) interposed therebetween. The cylinder 44 is made of 53 and the cylinder portion 11A.
4. The oil supply device for a tool holder according to claim 3, wherein the oil supply device is formed so as not to rotate in the circumferential direction and is connected to the non-rotating oil supply ring 13 via the oil passage pipe 15 with the cylindrical body 44. 16. The non-rotating oil supply support member 11 is integrally provided with an oil passage connector 14 that can be connected to an oil supply table 23 provided on the machine tool side, and the oil passage connector 14 is the oil passage connection device. When the tool 14 is not connected to the fueling table 23, the oil passage connector 14 regulates the rotary shaft 10 with each other to prevent relative rotation between the two, and when the oil passage connector 14 is connected to the fueling table 23. The oil supply device for a tool holder according to claim 1, further comprising a relative rotation restricting means (31) for releasing a restriction state of the oil passage connector (14) and the rotary shaft (10) to loosen the rotation of the rotary shaft (10).