CN108145499A - A kind of static pressure cone bearing shafting and precision machine tool - Google Patents
A kind of static pressure cone bearing shafting and precision machine tool Download PDFInfo
- Publication number
- CN108145499A CN108145499A CN201711402563.3A CN201711402563A CN108145499A CN 108145499 A CN108145499 A CN 108145499A CN 201711402563 A CN201711402563 A CN 201711402563A CN 108145499 A CN108145499 A CN 108145499A
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- Prior art keywords
- static pressure
- conical surface
- cavity
- cone bearing
- indent
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Classifications
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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
- 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
- B23Q5/06—Driving main working members rotary shafts, e.g. working-spindles driven essentially by fluid pressure or pneumatic power
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
According to static pressure cone bearing shafting according to the present invention and precision machine tool,Including at least one static pressure cone bearing and rotation axis,Static pressure cone bearing has support base,Accommodate component and rotating member,It accommodates component and includes receiving member and multiple static pressure bushings,Receiving member has multiple static pressure channels being used for through fluid,Static pressure channel is arranged in the inner wall of receiving member and penetrates through the indent conical surface and outer surface,Static pressure bushing is arranged on the opening of the opening of the first cavity and static pressure cavity towards the indent conical surface,Rotating member has the convex conical surface to match with the indent conical surface,Multiple static pressure bushings are arranged on along at least one plane of arrangement on the indent conical surface,Plane of arrangement is the plane of the rotation axis perpendicular to rotating member,Support base has the support base inner cavity to match with the outer surface of receiving member,The static pressure cone bearing of the present invention,Convex cone is not in contact with each other when rotating with concave cone face,Therefore the dynamic rotary precision of the main shaft on cone bearing can be improved using gas or Liquid Static-Press Technique.
Description
Technical field
The invention belongs to machinery fields, and in particular to a kind of static pressure cone bearing shafting and lathe.
Background technology
It is contact condition when the revolute pair of the prior art rotates mostly, rotation precision and efficiency is not high.
The bearing combined using gas or Liquid Static-Press Technique with cone structure is that current raising main shaft running accuracy is effective
One of approach.
According to gas (air) or liquid (fluid) static pressure technology basic principle, liquid or gas with certain pressure are allowed
Medium, in the multiple chambers for having respectively entered the cone axis concave conical surface, by have outside flow controller can adjust fluid pressure and
Flow.Due to there is certain gap between the concave, convex conical surface, convex cone floats, in contactless state during rotation, but the cone bearing
Concave cone face and chamber requirement on machining accuracy it is high, processing cost is big.
Invention content
The present invention is to carry out to solve the above-mentioned problems, and it is an object of the present invention to provide a kind of smart to concave cone face and chamber process
It spends of less demanding, the static pressure cone bearing shafting and lathe of processing cost can be reduced.
The present invention provides a kind of static pressure cone bearing shaftings, have the feature that, including static pressure cone bearing；And
Rotation axis is arranged in static pressure cone bearing, wherein, static pressure cone bearing has support base, accommodates component and rotating member, holds
Component of receiving includes receiving member and multiple static pressure bushings with the indent conical surface and outer surface, and receiving member is used to pass through with multiple
The static pressure channel of fluid, static pressure channel are arranged in the inner wall of receiving member and penetrate through the indent conical surface and outer surface, static pressure channel packet
Include the static pressure duct for being arranged on the first cavity to concave on the indent conical surface with connecting the first cavity and outer surface, static pressure bushing tool
There is a cylindrical static pressure cavity, static pressure bushing is arranged on the opening of the opening of the first cavity and static pressure cavity towards interior concave cone
Face, the bottom of static pressure cavity are connected with the first cavity, rotating member, have the convex conical surface to match with the indent conical surface, Duo Gejing
Pressure bushing is arranged on along at least one plane of arrangement on the indent conical surface, and plane of arrangement is the flat of the rotation axis perpendicular to rotating member
Face, support base have a support base inner cavity to match with the outer surface of receiving member, receiving member be arranged in support base intracavitary and with branch
Seat inner cavity interference fit is supportted, at least one support base channel being connected with static pressure duct is provided on support base.
In static pressure cone bearing shafting provided by the invention, it can also have the feature that：Wherein, the indent conical surface
Taper is 60-150 degree, and the taper of convex conical surface is 60-150 degree, and the quantity of the first cavity is at least 3.
In addition, in static pressure cone bearing shafting provided by the invention, can also have the feature that：Wherein, static pressure
The shape of cavity accent is round, ellipse, square, rectangle and it is trapezoidal in any one.
In addition, in static pressure cone bearing shafting provided by the invention, can also have the feature that：Wherein, static pressure
The depth of the indent of cavity is 0.5-5mm, and static pressure cavity total surface area accounts for the 40-60% of indent conical surface total surface area.
In addition, in static pressure cone bearing shafting provided by the invention, can also have the feature that：Wherein, indent
A plurality of isolation channel is also evenly arranged on the conical surface, isolation channel is between two adjacent the first cavitys, the elongated end of isolation channel
It is intersected on the rotation axis of revolving member, the groove width of isolation channel is 2-4mm, depth 2-5mm, the indent conical surface and outer convex cone
The surface in face is both provided with corrosion-inhibiting coating.
In addition, in static pressure cone bearing shafting provided by the invention, can also have the feature that：Wherein, static pressure
The top end face of bushing is higher than the indent conical surface.
In addition, in static pressure cone bearing shafting provided by the invention, can also have the feature that：Wherein, static pressure
The top end face of bushing is the arcwall face coincideing with the indent conical surface and coincide with the indent conical surface.
In addition, in static pressure cone bearing shafting provided by the invention, can also have the feature that：Wherein, static pressure
Bushing is with receiving component to be fixedly connected or being detachably connected.
The present invention also provides a kind of precision machine tools, use the static pressure cone bearing shafting of above-mentioned any one, feature
It is：
Wherein, rotation axis is the workpiece rotary shaft or tool rotating shaft in precision machine tool.
In precision machine tool provided by the invention, it can also have the feature that：
Wherein, precision machine tool is any one in lathe, grinding machine, boring machine, milling machine.
The effect of invention
According to static pressure cone bearing shafting according to the present invention, including at least one static pressure cone bearing and rotation axis,
Wherein, static pressure cone bearing has support base, accommodates component and rotating member, accommodates component and includes having the indent conical surface and appearance
The receiving member in face and multiple static pressure bushings, receiving member have multiple static pressure channels being used for through fluid, the setting of static pressure channel
In the inner wall of receiving member and the perforation indent conical surface and outer surface, static pressure channel includes being arranged on the to concave on the indent conical surface
One cavity and the static pressure duct for connecting the first cavity and outer surface, static pressure bushing have cylindrical static pressure cavity, static pressure bushing
The opening of the opening of the first cavity and static pressure cavity is arranged on towards the indent conical surface, the bottom of static pressure cavity and the first cavity phase
Connection, rotating member have the convex conical surface to match with the indent conical surface, and multiple static pressure bushings are arranged on along at least one plane of arrangement
On the indent conical surface, plane of arrangement is the plane of the rotation axis perpendicular to rotating member, and support base has the outer surface with receiving member
The support base inner cavity of matching, receiving member are arranged on intracavitary in support base and are interference fitted with support base inner cavity, set on support base
There is at least one support base channel being connected with static pressure duct.
According to static pressure cone bearing shafting according to the present invention, convex cone is not in contact with each other when rotating with concave cone face, locates always
In gas or state of liquid friction, in this way, the rotation center jerk value and the foozle of bumps cone when convex cone rotates be not straight
Relationship is connect, i.e., convex cone jerk value is not equal to concave-convex cone deviation from circular from amount, and according to actual measurement, jerk value when convex cone rotates is concave-convex cone
The 1/5-1/10 of deviation from circular from amount, relative to static pressure cylinder rolling bearing, static pressure cone rolling bearing has preferably matches with one heart
It is right, therefore use gas or Liquid Static-Press Technique that can improve the dynamic rotary precision of the main shaft in revolute pair, reach 0.1-1.0
μm。
In addition, static pressure bushing is arranged on after being on the indent conical surface, the static pressure cavity processing of bushing can be processed individually, quiet
The difficulty of processing of indentation chamber requires to substantially reduce, and so as to improve the working efficiency of static pressure cavity processing, reduces processing cost.
Description of the drawings
Fig. 1 is static pressure cone bearing shafting schematic diagram in the embodiment of the present invention；
Fig. 2 is static pressure cone revolute pair schematic diagram in the embodiment of the present invention；
Fig. 3 is receiving member sectional view in the embodiment of the present invention；
Fig. 4 is B direction views in Fig. 3；
Fig. 5 is the enlarged diagram of part A in Fig. 2；And
Fig. 6 is the sectional view of support base.
Specific embodiment
It is real below in order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention
Example combination attached drawing is applied to be specifically addressed the static pressure cone bearing shafting of the present invention.
Embodiment one
As shown in Figure 1, static pressure cone bearing shafting 100 includes 2 static pressure cone bearings and a rotation axis 40.
Static pressure cone axis, which is contracted, includes receiving member 10, rotating member 20, support base 30.
As shown in Fig. 2, receiving member 10 includes receiving member 11 and multiple static pressure bushings 12.
Receiving member 11 includes the indent conical surface 111, outer surface 112, multiple static pressure channels 113 and through-hole 114.
And some do not need to axis by occasion, receiving member 11 can be not provided with through-hole 114.In the present embodiment, accommodate
Part 11 interior 111 center of concave cone face it is horizontally arranged be useful for rotation axis 40 by through-hole 114, receiving member 11 using gold
Category is made.
Static pressure channel 113 is arranged in the inner wall of receiving member 11 and penetrates through the indent conical surface 111 and outer surface 112, and static pressure leads to
Road 113 includes being arranged on the first cavity 113a to concave on the indent conical surface 111 and connects the first cavity 113a and outer surface 112
Static pressure duct 113b, static pressure channel 113 is used for through fluid, the static pressure duct 113b that external high-pressure fluid passes through outer surface
Into the indent conical surface 111.In the present embodiment, which is liquid oil.
As shown in figure 5, static pressure bushing 12 has cylindrical static pressure cavity 121, static pressure bushing 12 is arranged on the first cavity
The opening of 113a and the opening of static pressure cavity 121 are towards the indent conical surface 111, the bottom of static pressure cavity 121 and the first cavity
113a is connected, and in embodiment, static pressure bushing 12 is made of metal.
As shown in Figure 2, Figure 4 shows, multiple static pressure bushings 12 are arranged on along at least one plane of arrangement on the indent conical surface 111, cloth
Horizontalization face is the plane perpendicular to 20 rotation axis of rotating member, and in embodiment, 20 rotation axis of rotating member is horizontal line, cloth horizontalization
Face is two, and the quantity of static pressure bushing 12 is 16, and the bushing quantity in each plane of arrangement is 8.
As shown in Fig. 2, rotating member 20 has convex conical surface 21, convex conical surface 21 and 111 phase of the indent conical surface of rotating member 20
Match, have certain gap between the concave, convex conical surface, rotating member 20 is rotated around horizontal line in interior concave cone face 111, when external high pressure
When liquid oil enters concave cone face 111 by the static pressure duct 113b of outer surface by static pressure bushing 12, rotating member 20 floats, rotation
When be in contactless state.
The cooperation taper between component 10 and rotating member 20 is accommodated, it is true according to the size of outer radial load and axial load
It is fixed.The taper of the indent conical surface is 60-150 degree, and the taper of convex conical surface is 60-150 degree.The cone of the indent conical surface 111 in this example
Degree and the taper of convex conical surface 21 are 90 degree.
In embodiment, rotating member 20 be provided in the horizontal direction with through-hole 114 match for rotation axis 40 by
Through-hole 114.
Support base 30 has the support base inner cavity to match with the outer surface 112 of receiving member 10, and receiving member 10 is arranged on support
Seat in intracavitary and with support base inner cavity be interference fitted.
At least one support base channel 31 being connected with static pressure duct 113b is provided on support base 30.
As shown in fig. 6, support base channel 31 includes multiple support base ducts 311 and annular groove 312, annular groove 312 is along at least
One plane of arrangement indent is arranged on support base surface of internal cavity and matches with static pressure duct 113b, support base duct 311
One end is connected with annular groove 312, and the other end is in communication with the outside.In embodiment, the quantity in support base duct 311 is 2, annular groove 312
Quantity for 2, support base 30 is made of metal.
Rotation axis 40 is arranged in through-hole 114 and penetrates through rotating member 20 and receiving member 10, and in embodiment, rotation axis 40 uses
Metal is made, and rotation axis 40 is connect with 20 interference of rotating member, and the indent conical surface arrangement of two static pressure cone bearings is indent
In face of inner concave, back-to-back arrangement can also be carried out in turn, the arrangement in embodiment is the internal concave surface of inner concave.
Embodiment two
The present embodiment other structures are identical with embodiment two, the difference is that the shape of 121 mouthfuls of static pressure cavity is round, oval
Shape, square, rectangle and it is trapezoidal in any one.
The shape of 121 mouthfuls of static pressure cavity is ellipse in embodiment two.
Embodiment three
The present embodiment other structures are identical with embodiment two, the difference is that the depth of the indent of static pressure cavity 121 is 0.5-
5mm, 121 total surface area of static pressure cavity account for the 40-60% of indent conical surface total surface area.
The depth of the indent of static pressure cavity 121 is 2mm in embodiment three, and 121 total surface area of static pressure cavity accounts for the indent conical surface
The 45% of 11 total surface areas.
Example IV
The present embodiment other structures are identical with embodiment three, unlike static pressure bushing 12 top end face be and the indent conical surface
111 identical arcwall faces, the top end face of static pressure bushing 12 is higher than the indent conical surface 111, top end face and the indent conical surface 111 of bushing 12
Distance according to bearing capacity, fluid viscosity and liner size size etc. determine.
In example IV, the top end face of static pressure bushing 12 is 0.5mm higher than the distance of the indent conical surface 111.
Embodiment five
As shown in fig. 6, the present embodiment other structures are identical with example IV, unlike static pressure bushing 12 top end face with
The indent conical surface matches.
The top end face of static pressure bushing 12 is 0 with indent conical surface distance.
Embodiment six
The other structures of the present embodiment are identical with embodiment five, the difference is that 12 and first cavity 113a of static pressure bushing is solid
Fixed connection.
Static pressure bushing 12 and the first cavity 113a are the mode that is fixedly connected using Nian Jie or be interference fitted, in embodiment six
Static pressure bushing 12 and the first cavity 113a are the mode being fixedly connected using Nian Jie.
Embodiment seven
The other structures of the present embodiment are identical with embodiment five, the difference is that 12 and first cavity 113a of static pressure bushing is can
Dismantling connection.
Static pressure bushing 12 is that the mode being fixedly connected is connect using screw with the first cavity 113a in embodiment seven.
Embodiment eight
The other structures of the present embodiment are identical with embodiment seven, the difference is that being provided with corrosion-inhibiting coating in convex conical surface 21.
Corrosion-inhibiting coating in embodiment eight is anti-decaying paint.
Embodiment nine
The other structures of the present embodiment are identical with embodiment seven, the difference is that being provided with corrosion-inhibiting coating on the indent conical surface 111.
Corrosion-inhibiting coating in embodiment nine is nano ceramics.
Embodiment ten
As shown in figure 4, the other structures of the present embodiment are identical with embodiment six, the difference is that also uniform on the indent conical surface 11
A plurality of isolation channel 115 is provided with, isolation channel 115 is between two adjacent the first cavity 113a, the elongated end of isolation channel 115
It is intersected on the rotation axis of revolving member, the groove width of isolation channel 14 is 2-4mm, depth 2-5mm.
The groove width of isolation channel 115 is 2.5mm in embodiment ten, and depth 2mm, quantity is 8.
Embodiment 11
The other structures of the present embodiment are identical with embodiment five, the difference is that the 21 upper edge cloth of convex conical surface of revolving member 20
Horizontalization face is provided with two annular grooves 211 with 121 corresponding indent of static pressure cavity.
Embodiment 12
The other structures of the present embodiment are identical with embodiment five, the difference is that the 21 upper edge cloth of convex conical surface of revolving member 20
Horizontalization face is provided with two annulus 212 with 121 corresponding evagination of static pressure cavity.
Embodiment 13
The other structures of the present embodiment are identical with embodiment 12, the difference is that support base channel 31 connects respectively including a plurality of
Logical static pressure duct 113b and extraneous support base duct 311, but there is no annular groove 312, in embodiment, the quantity in support base duct is
16.
Embodiment 14
A kind of precision machine tool, using above-mentioned static pressure cone bearing shafting as the workpiece rotary shaft or knife in precision machine tool
Has rotary shaft.
In the present embodiment, rotation axis is the workpiece rotary shaft in precision machine tool.
Embodiment 15
The other structures of the present embodiment are identical with embodiment 14,
Its precision machine tool is any one in lathe, grinding machine, boring machine, milling machine.
Precision machine tool is lathe in the present embodiment.
The effect of embodiment
Static pressure cone bearing shafting according to involved by the present embodiment, convex cone are not in contact with each other when rotating with concave cone face, begin
It is in gas or state of liquid friction eventually, in this way, rotation center jerk value when convex cone rotates and the manufacture of concave-convex cone miss
Difference is not directly dependent upon, i.e., convex cone jerk value is not equal to concave-convex cone deviation from circular from amount, according to actual measurement, jerk value when convex cone rotates
It is the 1/5-1/10 of concave-convex cone deviation from circular from amount, therefore the main shaft in revolute pair can be improved using gas or Liquid Static-Press Technique
Dynamic rotary precision, reach 0.1-1.0 μm.
In addition, static pressure bushing is arranged on after being on the indent conical surface, the difficulty of processing of the static pressure cavity of bushing requires significantly
It reduces, so as to improve the working efficiency of static pressure cavity processing, reduces processing cost.
Further, the top of static pressure bushing is higher than the indent conical surface, and the requirement on machining accuracy of the indent conical surface is not high, has and carries
High working efficiency reduces the effect of indent cone face process cost.
Further, static pressure bushing is connect with receiving component to be adhesively fixed, and is had the characteristics that easy to process.
Further, the convex conical surface upper edge plane of arrangement of revolving member is provided with and the corresponding evagination of static pressure bushing
Annulus substantially reduces the requirement on machining accuracy of convex conical surface, so as to improve work efficiency, reduces processing cost.
Preferred case of the above embodiment for the present invention, is not intended to limit protection scope of the present invention.
Claims (10)
1. a kind of static pressure cone bearing shafting, which is characterized in that including：
At least one static pressure cone bearing；And
Rotation axis is arranged in the static pressure cone bearing,
Wherein, the static pressure cone bearing has support base, accommodates component and rotating member,
The component that accommodates includes receiving member and multiple static pressure bushings with the indent conical surface and outer surface,
The receiving member has multiple static pressure channels for being used to pass through fluid, and the static pressure channel is arranged on the interior of the receiving member
In wall and penetrate through the indent conical surface and the outer surface,
The static pressure channel include being arranged on the first cavity for concaving on the indent conical surface and connect first cavity with
The static pressure duct of the outer surface,
The static pressure bushing have cylindrical static pressure cavity, the static pressure bushing be arranged on the opening of first cavity and
The opening of the static pressure cavity is connected towards the indent conical surface, the bottom of the static pressure cavity with first cavity,
Rotating member has the convex conical surface to match with the indent conical surface, is arranged in the indent conical surface,
Multiple static pressure bushings are arranged on along at least one plane of arrangement on the indent conical surface, and the plane of arrangement is vertical
In the plane of the rotation axis of the rotating member,
The support base has the support base inner cavity to match with the outer surface of the receiving member, and the receiving member is arranged on the branch
It supports intracavitary in seat and is interference fitted with the support base inner cavity,
At least one support base channel being connected with the static pressure duct is provided on the support base.
2. static pressure cone bearing shafting according to claim 1, it is characterised in that：
Wherein, the taper of the indent conical surface is 60-150 degree, and the taper of the convex conical surface is 60-150 degree,
The quantity of first cavity is at least 3.
3. static pressure cone bearing shafting according to claim 1, it is characterised in that：
Wherein, the shape of the static pressure cavity accent be round, ellipse, square, rectangle and it is trapezoidal in any one.
4. static pressure cone bearing shafting according to claim 1, it is characterised in that：
Wherein, the depth of the indent of the static pressure cavity is 0.5-5mm, and the static pressure cavity total surface area accounts for the interior concave cone
The 40-60% of face total surface area.
5. static pressure cone bearing shafting according to claim 1, it is characterised in that：
Wherein, also it is evenly arranged with a plurality of isolation channel on the indent conical surface, the isolation channel is located at adjacent two described the
Between one cavity, the elongated end of the isolation channel is intersected on the rotation axis of the revolving member,
The groove width of the isolation channel be 2-4mm, depth 2-5mm,
The surface of the indent conical surface and the convex conical surface is both provided with corrosion-inhibiting coating.
6. static pressure cone bearing shafting according to claim 1, it is characterised in that：
Wherein, the top end face of the static pressure bushing is higher than the indent conical surface.
7. static pressure cone bearing shafting according to claim 1, it is characterised in that：
Wherein, the top end face of the static pressure bushing is the arcwall face coincideing with the indent conical surface and is kissed with the indent conical surface
It closes.
8. static pressure cone bearing shafting according to claim 1, it is characterised in that：
Wherein, the static pressure bushing is to be fixedly connected or be detachably connected with the receiving component.
9. a kind of precision machine tool, using the static pressure cone bearing shafting described in any one in claim 1-8, feature exists
In：
Wherein, the rotation axis is the workpiece rotary shaft or tool rotating shaft in the precision machine tool.
10. precision machine tool according to claim 9, it is characterised in that：
Wherein, the precision machine tool is any one in lathe, grinding machine, boring machine, milling machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711402563.3A CN108145499A (en) | 2017-12-22 | 2017-12-22 | A kind of static pressure cone bearing shafting and precision machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711402563.3A CN108145499A (en) | 2017-12-22 | 2017-12-22 | A kind of static pressure cone bearing shafting and precision machine tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108145499A true CN108145499A (en) | 2018-06-12 |
Family
ID=62464406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711402563.3A Withdrawn CN108145499A (en) | 2017-12-22 | 2017-12-22 | A kind of static pressure cone bearing shafting and precision machine tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108145499A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2738400A1 (en) * | 1977-08-25 | 1979-03-01 | Hohenzollern Huettenverwalt | MACHINE TOOL WITH HYDROSTATICALLY MOUNTED FINE TURNING SPINDLE |
| CN202926870U (en) * | 2012-11-16 | 2013-05-08 | 陞鸿机械股份有限公司 | Dynamic pressure bearing device |
-
2017
- 2017-12-22 CN CN201711402563.3A patent/CN108145499A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2738400A1 (en) * | 1977-08-25 | 1979-03-01 | Hohenzollern Huettenverwalt | MACHINE TOOL WITH HYDROSTATICALLY MOUNTED FINE TURNING SPINDLE |
| CN202926870U (en) * | 2012-11-16 | 2013-05-08 | 陞鸿机械股份有限公司 | Dynamic pressure bearing device |
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Application publication date: 20180612 |
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| WW01 | Invention patent application withdrawn after publication |