KR101733756B1 - Rotary joint for spindle of construction machine - Google Patents

Rotary joint for spindle of construction machine Download PDF

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Publication number
KR101733756B1
KR101733756B1 KR1020150108073A KR20150108073A KR101733756B1 KR 101733756 B1 KR101733756 B1 KR 101733756B1 KR 1020150108073 A KR1020150108073 A KR 1020150108073A KR 20150108073 A KR20150108073 A KR 20150108073A KR 101733756 B1 KR101733756 B1 KR 101733756B1
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KR
South Korea
Prior art keywords
protector
casing
fluid
retainer
spindle
Prior art date
Application number
KR1020150108073A
Other languages
Korean (ko)
Other versions
KR20160071309A (en
Inventor
남상건
Original Assignee
남상건
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Filing date
Publication date
Application filed by 남상건 filed Critical 남상건
Publication of KR20160071309A publication Critical patent/KR20160071309A/en
Application granted granted Critical
Publication of KR101733756B1 publication Critical patent/KR101733756B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/10—Arrangements for cooling or lubricating tools or work
    • B23Q11/1015—Arrangements for cooling or lubricating tools or work by supplying a cutting liquid through the spindle
    • B23Q11/103—Rotary joints specially adapted for feeding the cutting liquid to the spindle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B47/00—Constructional features of components specially designed for boring or drilling machines; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/12—Arrangements for cooling or lubricating parts of the machine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/02—Driving main working members
    • B23Q5/04—Driving main working members rotary shafts, e.g. working-spindles

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary joint for a spindle of a machine tool, and more particularly, to a rotary joint for a spindle of a machine tool, To a rotary joint for a spindle of a machine tool.
The rotary joint 1000 for a spindle of a machine tool according to the present invention includes a casing retainer fitted in the axial direction of the casing so as to be movable only in the axial direction, an O-ring provided between the casing and the casing retainer, A cover fitted to the lower portion of the casing, a resilient member supported on the casing retainer and the cover, a spindle retainer fastened to the upper portion of the spindle rotating at high speed, and a non-rotating seal member A fluid supply hole 1930 is provided so as to be axially controlled to supply fluid to the hole 1110 of the casing 1100 and to supply fluid to the axial center, A protector guide portion 1920 is protruded in the axial direction toward the inner diameter of the hole 1110 so that a protector formed at the axial center of the casing retainer 1200 Inserted into hole 1210, the casing retainer is provided with the protector 1900 to be guided; The protector fitting hole is provided with a fluid friction portion 1220 which is rubbed by the fluid discharged from the fluid supply hole 1930 of the protector.

Description

Technical Field [0001] The present invention relates to a rotary joint for a spindle of a machine tool,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary joint for a spindle of a machine tool, and more particularly, to a rotary joint for a spindle of a machine tool, The present invention relates to a rotary joint for a spindle of a machine tool whose lifetime is prolonged.

In general, rotary joints are used in the fields of high speed drilling and boring transfer operations, in the field of high-speed machine tool spindles, and in other fields where it is necessary to transfer fluid media to rotating devices. In order to optimize the operation of high speed machine tools, rotary joints are required to supply a dry gas, such as liquid, air, such as aqueous or oily coolant, from a particular coolant supply to the rotating machine tool. One such field of rotary joints is the continuous supply of air to rotating machine tools to supply liquids such as coolants and lubricants to rotary machine tools and to clean machine tools or work areas. Another area of rotary joints relates to the high speed machining of special heat treated steels and in these high speed machining, the cutting tool becomes hot and can give a thermal shock to the cutting tool when supplying aqueous or oily coolant. In such cases, an air coolant should be used to cool the cutting tool. The third field of rotary joints is concerned with the processing of medical instruments, which are not suitable for use when the lubricating medium comes into contact with such instruments.

Such a rotary joint for a spindle of a conventional machine tool is disclosed in Korean Patent No. 10-0818595, filed by the present inventor and registered in the Korean Intellectual Property Office, which is known as "Rotary joint for spindle of machine tool" A casing retainer which is fitted in the axial direction of the casing so as to be able to move only in the axial direction without being rotated, and a casing retainer mounted on the inner circumferential surface of the casing and fitted in the outer peripheral surface of the casing retainer An O-ring provided so as to seal between an inner circumferential surface of the casing and an outer circumferential surface of the casing retainer, a non-rotating seal member seated on the lower portion of the casing retainer, a cover sandwiched between the casing retainer, A resilient member supported at its other end by a cover, And a rotation seal member fixed to an upper portion of the spindle retainer so as to be brought into close contact with and separated from the non-rotating seal member, wherein the upper portion of the casing retainer has a resistance Plane.

Therefore, the upper portion of the casing retainer is sharpened so that the resistance surface of the fluid is widened so that the casing retainer in the casing is closely contacted to the spindle retainer by the initial small pressure at which the fluid is supplied, so that the leakage of the fluid is prevented.

However, in this patent publication No. 10-0818595, as the processing speed increases, the pressure of the fluid also becomes higher, so that when the non-rotating seal member seated on the casing retainer and the rotating seal member seated on the spindle retainer come into close contact, There is a problem that a crack is generated due to the impact of the seal member and is broken.

Reference 10-0818595 entitled "Rotary joint for spindle of machine tool"

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide an anti-rotation seal member, And to provide a rotary joint for a spindle of a machine tool.

The present invention provides a rotary joint for a spindle of a machine tool in which a protector is segregated so that a fluid can be supplied to a fluid supply hole in an axial direction of a casing, There is a purpose.

The present invention relates to a machine tool in which a non-rotating seal member, which is supplied through a through-hole formed in a protector mounting head of a protector and which is supplied through a passage and a flow passage and seated in a casing retainer, and a rotating seal member mounted on the spindle retainer, The object of the present invention is to provide a rotary joint for a spindle.

The present invention provides a rotary joint for a spindle of a machine tool in which fluid is discharged by a sloped surface that is enlarged so that the diameter becomes larger as the fluid is discharged toward the fluid discharge side end of the fluid supply hole, .

To achieve the above object, the rotary joint for a spindle of a machine tool of the present invention includes a casing fixed to a housing of a machine tool so as to supply a fluid thereto, An O-ring which is seated on the inner circumferential surface of the casing so as to be sealed between the inner circumferential surface of the casing and the outer circumferential surface of the casing retainer so as to be fitted on the outer circumferential surface of the casing retainer, and a non- A spindle retainer fastened to an upper portion of the spindle rotating at a high speed at a lower portion thereof, and a spindle retainer fastened to the upper portion of the spindle retainer, A rotation fixed so as to be brought into close contact with and separated from the non-rotating seal member A fluid supply hole is provided in the hole of the casing so as to prevent the fluid from moving in the axial direction in which the fluid is discharged and a fluid can be supplied to the center in the axial direction, The protector guide portion is protruded in the axial direction so as to be inserted into a protector fitting hole formed in the axial center of the casing retainer to guide the casing retainer; And a fluid frictional portion which is rubbed by the fluid discharged from the fluid supply hole of the protector and is made to move slowly by the outer flow velocity rather than the central flow velocity is provided in the protector fitting hole of the casing retainer.

Here, a protector seat is provided in the hole of the casing, and a passageway is formed in the protector seat so that the fluid is separated so that fluid can be supplied in the axial direction of the casing.

The protector includes a protector mounting head portion to be seated on the protector mounting portion, a fluid supply hole is formed through the center of the protector mounting head portion and the protector guiding portion in the axial direction, Wherein at least one through hole is formed to communicate with the protector fitting hole and the fluid guiding hole, and a flow passage or gap is formed between the protector fitting hole and the protector guiding portion.

In addition, the fluid discharge side end portion of the fluid supply hole is further provided with an inclined surface which is circumferentially enlarged in diameter toward the fluid discharge side.

As described above, according to the rotary joint for a spindle of a machine tool according to the present invention, when a non-rotating seal member seated on a casing retainer and a rotating seal member seated on a spindle retainer are in close contact with each other, This has the effect of going long.

According to the rotary joint for a spindle of a machine tool according to the present invention, the protector is seated on the protector seat portion formed in the hole of the casing so that the protector can be seated separately so that fluid can be supplied to the fluid supply hole in the axial direction of the casing, And maintenance is smooth.

According to the rotary joint for a spindle of a machine tool according to the present invention, a non-rotating seal member, which is supplied to a passage and a passage through a through hole formed in a protector seat of a protector and is seated in a casing retainer, There is an effect that the fastening is further fastened and firmly adhered.

According to the rotary joint for a spindle of a machine tool according to the present invention, cavitation phenomenon can be prevented from occurring at the fluid discharge side by the inclined surface formed at the fluid discharge side end of the fluid supply hole.

1 is a longitudinal sectional view of a rotary joint for a spindle of a machine tool according to an embodiment of the present invention, wherein an upper half sectional view is a sectional view in which a non-rotating seal member and a rotating seal member are in close contact with each other, And the rotation seal member are not in close contact with each other,
Fig. 2 is a left side view of Fig. 1,
Fig. 3 is a right side view of Fig. 1,
4 is a detailed view of part A of Fig. 1,
5 is a detailed view of the portion B in Fig.

Hereinafter, a rotary joint for a spindle of a machine tool according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In the drawings, the same reference numerals are given to the same elements even when they are shown in different drawings. In the drawings, the same reference numerals as used in the accompanying drawings are used to designate the same or similar elements. And detailed description of the configuration will be omitted. Also, directional terms such as "top", "bottom", "front", "back", "front", "forward", "rear", etc. are used in connection with the orientation of the disclosed drawing (s). Since the elements of the embodiments of the present invention can be positioned in various orientations, the directional terminology is used for illustrative purposes, not limitation.

1 to 5, a rotary joint 1000 for a spindle of a machine tool according to an embodiment of the present invention includes a casing 1100 fixed to supply a fluid to a housing 1 of a machine tool, A casing retainer 1200 fitted in the axial direction of the casing so as to be able to move only in the axial direction without being rotated, and a casing retainer 1200 mounted on the inner circumferential surface of the casing so as to be fitted on the outer circumferential surface of the casing retainer, An O-ring 1300 installed to seal between the outer circumferential surfaces of the retainer, a non-rotating seal member 1400 seated on the lower portion of the casing retainer, a cover 1500 fitted to the lower portion of the casing, A spindle retainer 1700 fastened to the upper portion of the spindle 2 rotating at a high speed at a lower portion thereof, It is fixed to the upper portion of the container lifted and a rotating sealing member (1800) is the non-rotating seal member 1400 and the close contact with the separation to occur.

The casing 1100 is formed with a plurality of holes 1101 for fixing to the housing 1 and a fastening surface 1103 for fastening a not shown fluid supply pipe with a female screw 1102 formed around the shaft .

Accordingly, when fluid is supplied to the hole 1110 formed through the shaft center of the casing 1100, the fluid is supplied to the hole 1230 formed through the shaft center of the casing retainer 1200 and the non-rotating seal member 1400 When the casing retainer 1200 is lowered and the non-rotating seal member 1400 and the rotating seal member 1800 come into close contact with each other, fluid is supplied to the spindle 2 through the spindle retainer 1700, do.

The casing 1100 includes a casing 1100 and a casing 1100. The casing 1100 includes a casing 1100 and a casing 1100. The casing 1100 includes a casing 1100, A protector 1900 fitted to the protector guide hole 1910 at the center of the direction and inserted into a protector fitting hole 1210 formed to allow the casing retainer to move in the axial direction to guide the casing retainer 1200; A fluid friction portion 1220 is provided on the inner diameter of either the protector fitting hole 1210 or the hole 1230, which is a hole.

A hole 1230 of the casing retainer 1200 is formed with a protector insertion hole 1210 having a larger diameter than the hole 1230 so that the protector 1900 is inserted.

It should be understood that the protector 1900 may be formed integrally with the hole 1110 of the casing 1100 and may be configured separately as shown in FIG. In the case where the protector 1900 is configured separately, a protector seating portion 1120 is provided in the hole 1110 of the casing 1100, and a fluid (not shown) is applied to the protector seating portion 1120 in the axial direction of the casing 1100. The protector 1900 is fitted and seated.

The protector 1900 includes a protector seating head 1910 that is seated on the protector seating portion 1120 and a protector 1910 that is smaller in diameter than the protector seating head portion, A protector guide portion 1920 fitted in the hole 1210 and a fluid supply hole 1930 formed through the center of the protector mounting head 1910 and the protector guide portion 1920 in the axial direction.

Therefore, when a fluid is supplied through the fluid supply hole 1930, the non-rotating seal member 1400, which is frictionally engaged with the fluid in the fluid friction portion 1220 and gradually seated and fixed to the casing retainer 1200, The non-rotating seal member 1400 and the rotating seal member 1800 are not damaged and thus the productivity is very high because the rotating seal member 1800 is seated on the fixed seal member 1700 to prevent the leakage of the fluid. .

That is, when the fluid is introduced into the fluid supply hole 1930 of the present invention, the casing retainer 1200 is moved in the axial direction by the pressure of the reduced flow velocity contacting the fluid friction portion 1220, The non-rotating seal member 1400 increases the durability of the rotating seal member 1800 and increases the service life of the rotary joint for the spindle of the machine tool as the impact is reduced in contact with the seal member 1800 .

Here, the fluid friction portion 1220 may be formed as an inclined surface as shown in FIG. 1, or may be formed as a concave groove.

At least one through hole 1940 is formed in the protector mounting head 1910 and a passage 1130 through which the fluid flowing through the through hole 1940 moves is formed in the protector mounting portion 1120 One or more grooves S may be formed between the protector fitting hole 1210 of the casing retainer 1200 and the protector guide portion 1920. [

The fluid is introduced along the through hole 1940, the passage 1130 and the flow path S and is brought into contact with the sharpened upper portion of the fluid rubbing portion 1220 and the casing retainer 1200, So that the non-rotating seal member 1400 is brought into close contact with the rotating seal member 1800 fixed to the spindle retainer 1700 so that fluid flows between the non-rotating seal member 1400 and the rotating seal member 1800 Thereby further preventing leakage.

On the other hand, when the supply of the fluid supplied to the casing 1100 is interrupted, the non-rotating seal member 1400 and the rotating seal member 1800 are opened by the resilient member 1600 to prevent unnecessary friction do.

As shown in FIGS. 1 and 5, the fluid discharge side end of the fluid supply hole 1930 is further provided with an inclined surface 1950 whose diameter is increased toward the fluid discharge side.

Therefore, since the fluid is discharged to the fluid discharge side end portion of the protector 1900 by the inclined surface 1950, cavitation phenomenon occurs at the fluid discharge side end portion of the protector 1900 and the protector fitting hole 1210 of the casing retainer 1200 While the fluid friction portion 1220 is formed as an inclined surface as shown in FIGS. 1 and 5, so that cavitation phenomenon does not occur further.

The rotary joint 1000 for a spindle of a machine tool of the present invention is configured such that when fluid flows into the hole 1110 of the casing 1100, the fluid flows through the fluid supply hole 1930, the through hole 1940 and the passage 1130, The casing retainer 1200 covers the entire casing retainer 1200 and applies pressure to the casing retainer 1200. The casing retainer 1200 having the non-rotating seal member 1400 fixed to its lower portion is guided by the protector guide portion 1920 of the protector 1900 from the inside And the seal surface of the non-rotating seal member 1400 is accurately in contact with the seal surface of the rotation seal member 1800 while supporting the outer surface of the non-rotating seal member 1400 with the hole 1110 of the casing 1100, So that the life of the joint can be extended and the productivity is improved.

The embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art will be able to modify the technical idea of the present invention in various forms. Accordingly, such improvements and modifications will fall within the scope of the present invention if they are apparent to those skilled in the art.

1000: Rotary joint for spindle of machine tool 1100: Casing
1200: casing retainer 1210: protector fitting hole
1220: Fluid friction part 1300: O-ring
1400: Non-rotating seal member 1500: Cover
1600: Elastic member 1700: Spindle retainer
1800: Rotation seal member 1900: Protector
1910: Protector seating head 1920: Protector guide
1930: fluid supply hole 1940: through hole
1950: slope

Claims (4)

A casing retainer fixed to a housing of a machine tool and provided with a hole for supplying a fluid in an axial direction, a casing retainer fitted in the axial direction of the casing so as to be movable only in the axial direction without rotating, An O-ring provided so as to be sealed between the inner circumferential surface of the casing and the outer circumferential surface of the casing retainer so as to be fitted to the outer circumferential surface of the casing retainer, a non-rotating seal member seated in the lower portion of the casing retainer, a cover fitted to the lower portion of the casing, A spindle retainer fastened to an upper portion of a spindle rotated at a high speed at a lower portion thereof; and a spindle retainer fixed to an upper portion of the spindle retainer so as to be closely contacted with and separated from the non- A rotary shaft for a spindle of a machine tool including a rotating seal member In STE,
A protector receiving portion 1120 is provided in the hole 1110 of the casing 1100 to prevent the fluid from moving in the axial direction in which the fluid is discharged,
A protector fitting hole 1210 is formed in the upper portion of the casing retainer 1200 in the axial direction so that a protector guide portion 1920 is fitted to the casing retainer 1200 so that the casing retainer can move in the axial direction,
A protector mounting head portion 1910 formed to be seated on the protector mounting portion 1120 and a protector mounting head portion 1910 formed to have a predetermined length smaller in diameter than the protector mounting head portion and having a protector mounting hole 1210 of the casing retainer 1200, And a fluid supply hole 1930 formed through the protector guide 1920 to penetrate the center of the protector 1910 and the protector guide 1920 in the axial direction of the protector 1920, And a protector 1900 having a passage S made of a gap or groove formed between the inner diameter of the hole 1110 and the outer diameter of the protector guide portion 1920,
The protector fitting hole 1210 of the casing retainer 1200 is rubbed by the fluid discharged from the fluid supply hole 1930 of the protector 1900 by the outer flow velocity rather than the central flow velocity so as to move the casing retainer 1200 in the axial direction The fluid friction portion 1220 is further moved to be moved slowly,
The protector receiving portion 1120 is formed with a passage 1130 through which the fluid is separated so as to be supplied with fluid in the axial direction of the casing 1100,
The protector (1900)
The protector seating head portion 1910 is connected to the passage 1130 of the protector seating portion 1120 so that the fluid pushes the casing retainer 1200 in the axial direction and has at least one through hole 1940) is formed on the outer circumferential surface of the rotary joint. delete delete The method according to claim 1,
Further comprising a slope (1950) on the fluid discharge side of the fluid supply hole (1930), the diameter of which is increased toward the fluid discharge side.
KR1020150108073A 2014-12-11 2015-07-30 Rotary joint for spindle of construction machine KR101733756B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020140178206 2014-12-11
KR20140178206 2014-12-11

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KR20160071309A KR20160071309A (en) 2016-06-21
KR101733756B1 true KR101733756B1 (en) 2017-05-10

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102564858B1 (en) 2022-12-22 2023-08-09 주식회사 멀티스하이드로 Rotary joint for spindle of construction machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100818595B1 (en) * 2007-01-26 2008-04-02 주식회사 멀티스하이드로 Rotary joint for spindle of construction machine
JP4219649B2 (en) 2002-10-18 2009-02-04 リックス株式会社 Rotary joint
JP4542114B2 (en) * 2007-04-11 2010-09-08 リックス株式会社 Rotary seal mechanism and rotary joint in fluid feed mechanism

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4219649B2 (en) 2002-10-18 2009-02-04 リックス株式会社 Rotary joint
KR100818595B1 (en) * 2007-01-26 2008-04-02 주식회사 멀티스하이드로 Rotary joint for spindle of construction machine
JP4542114B2 (en) * 2007-04-11 2010-09-08 リックス株式会社 Rotary seal mechanism and rotary joint in fluid feed mechanism

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102564858B1 (en) 2022-12-22 2023-08-09 주식회사 멀티스하이드로 Rotary joint for spindle of construction machine

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