KR20130083758A - Static pressure pre-pressure device for small spindle - Google Patents

Static pressure pre-pressure device for small spindle Download PDF

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Publication number
KR20130083758A
KR20130083758A KR1020120004555A KR20120004555A KR20130083758A KR 20130083758 A KR20130083758 A KR 20130083758A KR 1020120004555 A KR1020120004555 A KR 1020120004555A KR 20120004555 A KR20120004555 A KR 20120004555A KR 20130083758 A KR20130083758 A KR 20130083758A
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South Korea
Prior art keywords
retainer
spindle
preload
bearing
pipe
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KR1020120004555A
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Korean (ko)
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KR101336524B1 (en
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김주현
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현대위아 주식회사
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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
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/26—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members
    • B23Q1/262—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members with means to adjust the distance between the relatively slidable members
    • B23Q1/265—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members with means to adjust the distance between the relatively slidable members between rotating members
    • 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
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/70—Stationary or movable members for carrying working-spindles for attachment of tools or work
    • 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
    • B23Q11/0032—Arrangements for preventing or isolating vibrations in 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
    • B23Q5/043—Accessories for spindle drives
    • 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
    • B23Q5/20—Adjusting or stopping working-spindles in a predetermined position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • F16C13/02—Bearings
    • F16C13/06—Bearings self-adjusting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
    • F16C23/06—Ball or roller bearings
    • F16C23/08—Ball or roller bearings self-adjusting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C25/00—Bearings for exclusively rotary movement adjustable for wear or play
    • F16C25/06—Ball or roller bearings
    • F16C25/08—Ball or roller bearings self-adjusting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2260/00—Details of constructional elements
    • B23B2260/008—Bearings
    • B23B2260/0087—Preloading of bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2322/00—Apparatus used in shaping articles
    • F16C2322/39—General build up of machine tools, e.g. spindles, slides, actuators

Abstract

PURPOSE: A hydrostatic pre-loading device for a small spindle is provided to fix a ball cage in order to prevent the ball cage from freely and axially moving, thereby reducing manufacturing cost through miniaturization and weight reduction. CONSTITUTION: A hydrostatic pre-loading device (100) for a small spindle includes a housing (110), bearings (120a,120b), a first retainer (130), a second retainer (140), a spring for pre-loading, and a pipe (170). The housing houses the spindle (A). The bearings are inserted into the housing, and support the spindle. The bearing is placed between the retainers at the outer ring of the spindle. The spring elastically pre-loads the retainers. The pipe is connected between the retainers. The pipe transmits a pre-load on the first retainer to the bearing through the second retainer.

Description

소형 스핀들용 정압예압장치{STATIC PRESSURE PRE-PRESSURE DEVICE FOR SMALL SPINDLE}STATIC PRESSURE PRE-PRESSURE DEVICE FOR SMALL SPINDLE}

본 발명은 소형 스핀들용 정압예압장치에 관한 것이다.
The present invention relates to a hydrostatic preload device for a small spindle.

기존의 예압 방법에는 크게 정위치 예압과 정압 예압 두 가지로 나눌 수 있다. Conventional preloading methods can be classified into two types: in-position preload and constant pressure preload.

정위치 예압은 큰 강성을 요구하는 저속 회전에는 적합하나, 스핀들이 고속 회전을 하게 되면 원심력과 마찰력 등에 의해 늘어나게 됨으로써, 주축을 지지하는 베어링의 예압은 증가하게 된다. 이렇게 증가된 예압은 베어링의 수명 감소 및 소착 등의 원인이 된다. In-position preload is suitable for low-speed rotations that require great rigidity, but when the spindle rotates at high speeds, it is increased by centrifugal force and frictional force, thereby increasing the preload of the bearing supporting the main shaft. This increased preload causes a decrease in bearing life and sintering.

정압 예압은 고속 가공에 적합하도록 큰 가성 대신 발열을 저하시키고, 많은 회전수에 적당한 양의 예압이 가해지도록 한 방법이다. 정위치 예압의 단점을 해소하기 위해 후열 배어링의 외륜 축 방향을 자유로이 움직일 수 있도록 함으로써 일정한 예압이 가해지도록 한 구조이다.The static preload is a method in which heat generation is reduced instead of large caustic so as to be suitable for high speed processing, and an appropriate amount of preload is applied to a large number of rotations. In order to solve the shortcomings of the fixed position preload, the structure is designed to apply a constant preload by freely moving the outer ring axial direction of the rear row bearing.

도 1은 종래의 스핀들용 정압예압장치(10)를 나타낸 단면도이다.1 is a cross-sectional view showing a conventional hydrostatic preload device 10 for the spindle.

도 1에 도시된 바와 같이, 종래의 정압예압장치(10)는 제 1 하우징(1), 볼케이지(2), 제 2 하우징(4), 예압용 스프링(5)과 후열 베어링(6)으로 구성될 수 있다. 스핀들(3)은 전열 베어링(미도시)과 후열 베어링(6)에 의해 지지된다.As shown in FIG. 1, the conventional hydrostatic preload device 10 includes a first housing 1, a ball cage 2, a second housing 4, a preload spring 5, and a post-heat bearing 6. Can be configured. The spindle 3 is supported by a heat transfer bearing (not shown) and a back heat bearing 6.

도 1에 도시된 종래의 정압예압장치(10)의 경우, 스핀들(3)이 고속 회전을 하게 되면, 원심력과 마찰력 등으로 인해 늘어나게 된다. 상기 스핀들(3)이 늘어난 양 만큰 축 방향으로 볼케이지(2)를 통해 움직이게 되며, 예압용 스프링(5)의 탄성력이 제 1 하우징(4)에 전달되어 후열 베어링(6)에 일정한 예압이 가해지게 된다. 그리고, 스핀들(3)을 통해 전열 베어링(미도시)에도 일정한 예압이 가해지게 된다.In the case of the conventional positive pressure preload device 10 shown in FIG. 1, when the spindle 3 rotates at a high speed, the spindle 3 increases due to the centrifugal force and the frictional force. The spindle 3 is moved through the ball cage 2 in the axial direction in which the spindle 3 is extended, and the elastic force of the preload spring 5 is transmitted to the first housing 4 to apply a constant preload to the after-row bearing 6. You lose. Also, a constant preload is applied to the heat transfer bearing (not shown) through the spindle 3.

그러나, 이러한 종래의 정압예압장치(10)는 외륙 축 방향으로 자유로이 움직일 수 있도록 볼케이지(2)가 구성됨으로써, 제 1 하우징(1)의 외견이 커지게 되며, 가격적인 측면에서도 불리한 점이 있다. 따라서, 저가의 소형 머시닝 센터나 탭핑기에 적용하는 빌트인 스핀들은 주축경에 제약이 있어, 가능한 작은 사이즈로 제작하는 것이 유리하며 경량화 설계에도 도움이 된다.
However, the conventional positive pressure preloading device 10 has a ball cage 2 configured to freely move in the outward axial direction, thereby increasing the appearance of the first housing 1, which is disadvantageous in terms of cost. Therefore, the built-in spindles applied to low-cost, small machining centers and tapping machines have limited spindle diameters, which is advantageous in producing the smallest possible size, which is also helpful in light weight design.

본 발명은, 소형 머시닝 센터나 탬핑기의 빌트인 스핀들에 적용 가능하면서 소형화 및 경량화된 저가의 스핀들용 정압예압장치를 제공한다.
The present invention provides a low-pressure, constant-pressure preload apparatus for spindles that is applicable to a compact machining center or a built-in spindle of a tamping machine.

본 발명의 실시예에 따른 소형 스핀들용 정압예압장치는, 스핀들을 수용하는 하우징; 상기 하우징에 삽입되고 상기 스핀들을 지지하는 베어링; 상기 베어링을 사이에 두고 상기 스핀들의 외륜부에 각각 설치된 제 1 리테이너와 제 2 리테이너; 상기 제 1 리테이너에 예압을 탄력적으로 가하도록 설치된 예압용 스프링; 및 상기 제 1 리테이너와 상기 제 2 리테이너 사이에 연결되어, 상기 제 1 리테이너에 가해진 예압을 상기 제 2 리테이너를 통해 상기 베어링으로 전달하기 위한 파이프를 포함한다.In accordance with an aspect of the present invention, there is provided a hydrostatic preloading apparatus for a small spindle, the housing including a spindle; A bearing inserted into the housing and supporting the spindle; A first retainer and a second retainer respectively installed in the outer ring portion of the spindle with the bearing interposed therebetween; A preload spring installed to elastically apply a preload to the first retainer; And a pipe connected between the first retainer and the second retainer to transfer the preload applied to the first retainer through the second retainer to the bearing.

또한, 상기 파이프의 일측은 상기 제 1 리테이너와 볼트로 결합될 수 있다.In addition, one side of the pipe may be coupled to the first retainer and the bolt.

또한, 상기 파이프의 타측은 상기 제 2 리테이너의 연결홈에 삽입될 수 있다.In addition, the other side of the pipe may be inserted into the connecting groove of the second retainer.

또한, 상기 후열 베어링 사이 사이에 설치된 제 3 리테이너를 더 포함할 수 있다.
The apparatus may further include a third retainer installed between the post-row bearings.

본 발명에 따르면, 소형 머시닝 센터나 탬핑기의 빌트인 스핀들에 적용 가능하면서 소형화 및 경량화된 저가의 스핀들용 정압예압장치를 제공할 수 있다.
According to the present invention, it is possible to provide a static pressure preloading device for a spindle, which can be applied to a compact machining center or a built-in spindle of a tamping machine, while being compact and lightweight.

도 1은 종래의 스핀들용 정압예압장치를 나타낸 단면도이다.
도 2는 본 발명의 일 실시예에 따른 정압예압장치를 적용한 소형 스핀들의 전체 구성을 나타낸 단면도이다.
도 3은 도 2의 정압예압장치를 확대하여 나타낸 단면도이다.1 is a cross-sectional view showing a conventional hydrostatic preload device for the spindle.
Figure 2 is a cross-sectional view showing the overall configuration of a small spindle to which the static preload device according to an embodiment of the present invention.
3 is an enlarged cross-sectional view of the hydrostatic preload device of FIG. 2.

이하, 본 발명이 속하는 기술분야에 있어서 통상의 지식을 가진 자가 용이하게 실시할 수 있을 정도로 본 발명의 바람직한 실시예를 도면을 참조하여 상세하게 설명한다.
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings so that those skilled in the art can easily carry out the present invention.

도 2는 본 발명의 일 실시예에 따른 정압예압장치(100)를 적용한 소형 스핀들의 전체 구성을 나타낸 단면도이다. 도 3은 도 2의 정압예압장치(100)를 확대하여 나타낸 단면도이다.
Figure 2 is a cross-sectional view showing the overall configuration of a small spindle to which the static preload device 100 according to an embodiment of the present invention. 3 is an enlarged cross-sectional view of the hydrostatic preload device 100 of FIG. 2.

도 2 및 도 3을 참조하면, 본 발명의 실시예에 따른 정압예압장치(100)는, 하우징(110), 후열 베어링(120a), 전열 베어링(120b), 제 1 리테이너(130), 제 2 리테이너(140), 예압용 스프링(160), 및 파이프(170)를 포함한다.
2 and 3, the positive pressure preload device 100 according to the embodiment of the present invention includes a housing 110, a post-heat bearing 120a, a heat transfer bearing 120b, a first retainer 130, and a second Retainer 140, preload spring 160, and pipe 170.

상기 하우징(110)은 스핀들(A)을 수용하는 역할을 한다.
The housing 110 serves to receive the spindle (A).

상기 후열 베어링(120a) 및 전열 베어링(120b)은 상기 하우징(110)에 삽입되며, 상기 스핀들(A)을 지지하는 역할을 한다.
The post heat bearing 120a and the heat transfer bearing 120b are inserted into the housing 110 and serve to support the spindle A.

상기 제 1 리테이너(130)와 제 2 리테이너(140)는 상기 후열 베어링(120a)을 사이에 두고 상기 스핀들(A)읠 외륜부에 각각 설치된다. 여기서, 제 1 리테이너(130)와 제 2 리테이너(140) 각각의 내측부는 상기 후열 베어링(120a)과 밀착될 수 있다. 상기 제 1 리테이너(130)의 외측 일측에는 상기 파이프(170)를 결합하기 위한 결합홀(131)과 상기 결합홀(131) 내에 볼트(133)를 구비할 수 있다. 상기 제 2 리테이너(140)의 외측 일측에는 상기 파이프(170)와 연결되기 위한 연결홈(141)이 형성될 수 있다. 여기서, 제 1 리테이너(130)의 외측 일측과 제 2 리테이너(140)의 외측 일측은 서로 대향한다. 한편, 축 방향의 후열 베어링(120a) 사이에 밀착된 제 3 리테이너(150)가 더 구비될 수 있다.
The first retainer 130 and the second retainer 140 are respectively installed in the outer ring portion of the spindle A with the rear bearing 120a therebetween. Here, the inner portion of each of the first retainer 130 and the second retainer 140 may be in close contact with the post-heat bearing 120a. An outer side of the first retainer 130 may be provided with a coupling hole 131 for coupling the pipe 170 and a bolt 133 in the coupling hole 131. A connection groove 141 may be formed at one outer side of the second retainer 140 to be connected to the pipe 170. Here, one outer side of the first retainer 130 and one outer side of the second retainer 140 face each other. On the other hand, the third retainer 150 in close contact between the post-row bearing 120a in the axial direction may be further provided.

상기 예압용 스프링(160)은 상기 제 1 리테이너(130)에 예압을 탄력적으로 가하도록 설치되며, 상기 하우징(110)에 의해 고정될 수 있다.
The preload spring 160 is installed to elastically apply the preload to the first retainer 130, and may be fixed by the housing 110.

상기 파이프(170)는 상기 제 1 리테이너(130)와 제 2 리테이너(140) 사이에 연결되어, 상기 제 1 리테이너(130)에 가해진 예압을 상기 제 2 리테이너(140)를 통해 상기 후열 베어링(120a)으로 전달하는 역할을 한다. 상기 파이프(170)의 일측은 상기 제 1 리테이너(130)에 형성된 결합홀(131)에 삽입된 후 볼트(133)와 체결됨으로써 상기 제 1 리테이너(130)와 연결된다. 상기 파이프(170)의 타측은 상기 제 2 리테이너(140)에 형성된 연결홈(141)에 삽입됨으로써, 상기 제 2 리테이너(140)와 연결된다.
The pipe 170 is connected between the first retainer 130 and the second retainer 140 so that the preload applied to the first retainer 130 is transferred through the second retainer 140 to the post-heat bearing 120a. It serves as a). One side of the pipe 170 is inserted into the coupling hole 131 formed in the first retainer 130 and then coupled to the bolt 133 so as to be connected to the first retainer 130. The other side of the pipe 170 is inserted into the connecting groove 141 formed in the second retainer 140, thereby being connected to the second retainer 140.

이하, 본 발명의 실시예에 따른 정압예압장치(100)의 동작에 대하여 설명한다.Hereinafter, the operation of the hydrostatic preload device 100 according to the embodiment of the present invention will be described.

먼저, 제 1 리테이너(130)에 예압용 스프링(160)으로부터 예압이 가해지면, 이 힘은 제 1 리테이너(130)에서 볼트(133)와 파이프(170)를 통해 제 2 리테이너(140)로 전달된다. 이때, 제 2 리테이너(140)는 후열 베어링(120a)뿐만 아니라 전열 베어링(120b)에도 일정한 예압을 가하게 된다. First, when preload is applied to the first retainer 130 from the preload spring 160, this force is transmitted from the first retainer 130 to the second retainer 140 through the bolt 133 and the pipe 170. do. At this time, the second retainer 140 applies a predetermined preload not only to the post-heat bearing 120a but also to the heat transfer bearing 120b.

상기와 같은 구조를 통해 후열 베어링(120a)과 전열 베어링(120b)에 예압용 스프링(160)의 탄성력이 가해짐으로써, 스핀들(a)은 반경 방향 및 축 방향으로 강성을 유지하도록 지지될 수 있다.
By applying the elastic force of the preload spring 160 to the after-heat bearing 120a and the heat-transfer bearing 120b through the above structure, the spindle a can be supported to maintain rigidity in the radial direction and the axial direction. .

한편, 도 1에 도시된 종래의 정압예압장치(10)와 본 발명의 실시예에 따른 정압예압장치(100)를 비교하면, 종래의 정압예압장치(10)에서 축 방향으로 움직이며 경방향을 지지하는 볼케이지(2)는 본 발명의 실시예에의 정압예압장치(100)에서는 파이프(170)가 그 기능을 수행하고 있다. 이에 따라, 제품 비용 절감 효과가 있다.
On the other hand, when comparing the conventional hydrostatic preload device 10 shown in Figure 1 and the hydrostatic preload device 100 according to the embodiment of the present invention, the conventional positive pressure preload device 10 moves in the axial direction in the radial direction In the supporting ball cage 2, the pipe 170 performs its function in the positive pressure preload device 100 according to the embodiment of the present invention. Accordingly, there is a product cost reduction effect.

또한, 본 발명의 실시예에 따른 정압예압장치(100)는 종래의 정압예압장치(10)에서 후열 베어링(6)을 지지하기 위한 제 2 하우징(4)이 생략됨으로써, 주축경을 줄일 수 있는 장점이 있다. 이에 따라, 소형화 및 경량화된 저가의 스핀들용 정압예압장치를 제공할 수 있다.
In addition, the hydrostatic preloading apparatus 100 according to the embodiment of the present invention may reduce the main shaft diameter by omitting the second housing 4 for supporting the post-heat bearing 6 in the conventional hydrostatic preloading apparatus 10. There is an advantage. As a result, it is possible to provide a static pressure preloading device for a spindle that is compact and lightweight.

본 발명은 상기 실시예들에 한정되지 않고 본 발명의 기술적 요지를 벗어나지 아니하는 범위 내에서 다양하게 수정 및 변형되어 실시될 수 있음은 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에 있어서 자명한 것이다.It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. It is.

100: 정압예압장치
110: 하우징
120a: 후열 베어링
120b: 전열 베어링
130: 제 1 리테이너
131: 결합홀
133: 볼트
140: 제 2 리테이너
141: 연결홈
150: 제 3 리테이너
160: 예압용 스프링
170: 파이프
A: 스핀들100: constant pressure preload
110: Housing
120a: back row bearing
120b: electrothermal bearing
130: first retainer
131: coupling hole
133: bolt
140: second retainer
141: connecting groove
150: 3rd retainer
160: preload spring
170: pipe
A: spindle

Claims (4)

스핀들을 수용하는 하우징;
상기 하우징에 삽입되고 상기 스핀들을 지지하는 베어링;
상기 베어링을 사이에 두고 상기 스핀들의 외륜부에 각각 설치된 제 1 리테이너와 제 2 리테이너;
상기 제 1 리테이너에 예압을 탄력적으로 가하도록 설치된 예압용 스프링; 및
상기 제 1 리테이너와 상기 제 2 리테이너 사이에 연결되어, 상기 제 1 리테이너에 가해진 예압을 상기 제 2 리테이너를 통해 상기 베어링으로 전달하기 위한 파이프를 포함하는 소형 스핀들용 정압예압장치.A housing accommodating the spindle;
A bearing inserted into the housing and supporting the spindle;
A first retainer and a second retainer respectively installed in the outer ring portion of the spindle with the bearing interposed therebetween;
A preload spring installed to elastically apply a preload to the first retainer; And
And a pipe connected between the first retainer and the second retainer to transfer a preload applied to the first retainer through the second retainer to the bearing. 제 1 항에 있어서,
상기 파이프의 일측은 상기 제 1 리테이너와 볼트로 결합되는 것을 특징으로 하는 소형 스핀들용 정압예압장치.The method of claim 1,
One side of the pipe is a hydrostatic preload device for a small spindle, characterized in that coupled to the first retainer and the bolt. 제 2 항에 있어서,
상기 파이프의 타측은 상기 제 2 리테이너의 연결홈에 삽입되는 것을 특징으로 하는 소형 스핀들용 정압예압장치.3. The method of claim 2,
The other side of the pipe is a positive pressure pre-loading device for a small spindle, characterized in that inserted into the connecting groove of the second retainer. 제 1 항에 있어서,
상기 후열 베어링 사이에 설치된 제 3 리테이너를 더 포함하는 것을 특징으로 하는 소형 스핀들용 정압예압장치.The method of claim 1,
And a third retainer provided between the post bearings.
KR1020120004555A 2012-01-13 2012-01-13 Static pressure pre-pressure device for small spindle KR101336524B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220099650A (en) * 2021-01-07 2022-07-14 (주) 카스윈 Supersonic spindle of built in type and method for vibrating spindle

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Publication number Priority date Publication date Assignee Title
JP3253658B2 (en) * 1991-11-20 2002-02-04 日本電産株式会社 Spindle motor
JP4835484B2 (en) * 2007-03-26 2011-12-14 日本精工株式会社 Spindle device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220099650A (en) * 2021-01-07 2022-07-14 (주) 카스윈 Supersonic spindle of built in type and method for vibrating spindle
US11712740B2 (en) 2021-01-07 2023-08-01 Kaswin Co., Ltd. Built-in type supersonic spindle and excitation method using same

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