CN112077638B - Linear feeding unit of integrated hydrostatic nut main drive type lead screw pair - Google Patents
Linear feeding unit of integrated hydrostatic nut main drive type lead screw pair Download PDFInfo
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- CN112077638B CN112077638B CN202010746545.2A CN202010746545A CN112077638B CN 112077638 B CN112077638 B CN 112077638B CN 202010746545 A CN202010746545 A CN 202010746545A CN 112077638 B CN112077638 B CN 112077638B
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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
- B23Q5/22—Feeding members carrying tools or work
- B23Q5/26—Fluid-pressure drives
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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
- B23Q5/22—Feeding members carrying tools or work
- B23Q5/34—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission
- B23Q5/38—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously
- B23Q5/40—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously by feed shaft, e.g. lead screw
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a primary driving type screw pair linear feeding unit integrated with a hydrostatic nut, which adopts the technical scheme that: the hydrostatic guide rail is characterized by comprising a hydrostatic lead screw and a hydrostatic guide rail which are parallel to each other, wherein a nut component is axially arranged on the hydrostatic lead screw, and a hollow motor is arranged on one side of the nut component; the nut assembly is arranged below the workbench through a support frame, and the workbench is detachably connected with the hydrostatic guide rail; an oil collecting plate is coated on the outer side of the supporting frame to form an oil collecting space; the static pressure lead screw is arranged above the base, and the base is provided with a plurality of oil discharge grooves for discharging oil for the hydrostatic pressure guide rail and the oil collecting plate. The invention solves the problem that the machining precision is limited easily due to vibration, heating, deformation and the like caused by the fact that the lead screw drives the hydrostatic pressure lead screw pair in the current precision and ultra-precision machining process, and can realize the ultra-high precision linear motion with large stroke, high rigidity and high frequency response in the precision and ultra-precision machining process.
Description
Technical Field
The invention relates to the technical field of precision and ultra-precision machining, in particular to a linear feeding unit of an integrated hydrostatic nut main drive type lead screw pair.
Background
The ultra-precision machining technology is used as a development support of national defense and high and new technology and plays an increasingly important role in modern manufacturing industry. With the continuous acceleration of the updating and upgrading speed of industrial products, the requirements on the performance indexes of precise and ultra-precise machine tools are gradually improved. The ultra-precise linear motion platform is used as an important realization component of ultra-precise processing equipment, and currently, forms of a linear motor, a ball screw pair and a hydrostatic pressure screw pair are mainly used.
Although the linear motor has high rigidity and quick response, the linear motor has problems in the aspects of interference resistance and damping. The ball screw pair adopts steel balls as running load bearing, and has the advantages of large self weight, easy deformation of the steel balls, poor bearing capacity and high lubricating requirement. The hydrostatic pressure screw pair has the characteristics of high rigidity, small friction and excellent damping characteristic because the hydrostatic pressure screw nut and the screw are lubricated by fluid, and is widely applied to precision and ultra-precision machining equipment at present. The inventor finds that, in the existing hydrostatic pressure screw rod pair, the screw rod rotates and the hydrostatic pressure screw rod nut usually realizes linear motion, the size and the weight of the hydrostatic pressure screw rod required in a large application scene are large, and the screw rod rotates at a high speed to generate a large inertia force to cause phenomena of vibration, heating, deformation and the like, so that the feeding precision is seriously influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the integrated hydrostatic nut main drive type screw pair linear feeding unit, solves the problem that the machining precision is limited easily due to vibration, heating, deformation and the like caused by the fact that a screw drives a hydrostatic screw pair in the current precision and ultra-precision machining process, and can realize ultrahigh-precision linear motion with large stroke, high rigidity and high frequency response in the precision and ultra-precision machining process.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the embodiment of the invention provides an integrated hydrostatic nut main drive type screw pair linear feeding unit which comprises a hydrostatic screw and a hydrostatic guide rail which are parallel to each other, wherein a nut component is axially arranged on the hydrostatic screw, and a hollow motor is arranged on one side of the nut component; the nut assembly is arranged below the workbench through a support frame, and the workbench is detachably connected with the hydrostatic guide rail; an oil collecting plate is coated on the outer side of the supporting frame to form an oil collecting space; the static pressure lead screw is arranged above the base, and the base is provided with a plurality of oil discharge grooves for discharging oil for the hydrostatic pressure guide rail and the oil collecting plate.
As a further implementation manner, the nut component comprises a bearing and a static pressure screw nut, and two ends of the static pressure screw nut are respectively provided with the bearing; the outer ring of one bearing is connected with the motor stator of the hollow motor through a bearing flange, and the motor rotor is matched with the static pressure screw nut through a nut flange.
As a further implementation mode, the inner surface of the static pressure screw nut is in threaded engagement with the static pressure screw, and two ends of the outer surface of the static pressure screw nut are in interference fit with the inner ring of the bearing respectively; and the bearing inner rings and the bearing outer rings at two ends of the static pressure lead screw nut are supported by a liquid oil film.
As a further implementation mode, nut oil inlets A are uniformly arranged in the circumferential direction of the bearing outer ring, an annular inner groove is formed in the bearing outer ring, and the nut oil inlets A are communicated with the annular inner groove.
As a further implementation manner, the bearing outer ring is also provided with bearing oil inlets which are uniformly distributed along the circumferential direction, and one side of the bearing outer ring, which is close to the bearing inner ring, is provided with an annular oil cavity; a gap is reserved between the bearing outer ring and the bearing inner ring, an annular oil discharge port is formed in the gap, and the annular oil discharge port and the bearing oil inlet are communicated with the annular oil cavity respectively.
As a further implementation mode, an oil inlet annular groove corresponding to the annular inner groove is formed in the static pressure screw nut, and the oil inlet annular groove is connected with a plurality of nut oil inlets B arranged along the circumferential direction of the static pressure screw nut; and the nut oil inlet B is communicated with the throttler.
As a further implementation mode, an oil outlet annular groove is formed in the static pressure screw nut and is close to the position of the inner ring of the bearing, and the oil outlet annular groove is communicated with a plurality of nut oil outlet holes distributed along the circumferential direction of the oil outlet annular groove.
As a further implementation mode, the side wall of the base is provided with a guide rail oil drainage groove, the length direction of the base is provided with a nut component oil drainage groove A, and two sides of the nut component oil drainage groove A are symmetrically provided with base oil drainage grooves; the nut component oil discharge groove A, the base oil discharge groove and the nut component oil discharge groove B are communicated, and the guide rail oil discharge groove and the base oil discharge groove are communicated.
As a further implementation mode, the inner surface of the oil collecting plate is provided with an oil baffle plate, and the bottom surface of the oil collecting plate is provided with an oil collecting hole.
As a further implementation mode, the support frame comprises a support plate and a mounting plate which are connected into a whole, the support plate is connected with the workbench, and the mounting plate is connected with the oil collecting plate and the bearing outer ring.
The beneficial effects of the above-mentioned embodiment of the present invention are as follows:
(1) according to one or more embodiments of the invention, as the hydrostatic nut is directly and mainly driven, the problems of vibration, heating, deformation and the like caused by the traditional driving mode are greatly reduced, meanwhile, the required rotating inertia force is reduced, and the ultrahigh-precision linear motion with large stroke, high rigidity, high efficiency and quick response in precision and ultraprecision machining can be realized by combining the hydrostatic guide rail;
(2) the motor stator of one or more embodiments of the invention is matched with the bearing outer ring through the bearing flange, the motor rotor is matched with the static pressure screw nut through the nut flange, the bearing has the radial and axial supporting function, and the friction is greatly reduced due to the support and transmission through the hydraulic oil film;
(3) according to one or more embodiments of the invention, the problem of winding of the oil passage of the nut rotation type hydrostatic lead screw pair is solved, the hydrostatic bearing and the hydrostatic lead screw nut in the nut driving type hydrostatic lead screw pair feeding unit do not need to be separately supplied with oil, the oil passage is simple in structure, and the cost is reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a cross-sectional view of the present invention according to one or more embodiments;
FIG. 2 is a schematic illustration of a hydrostatic guideway structure according to one or more embodiments of the present invention;
FIG. 3 is a cross-sectional view of a bearing oil feed and hydrostatic lead screw nut oil feed according to one or more embodiments of the present disclosure;
FIG. 4 is an oil-in cross-sectional view of the hydrostatic lead screw nut of FIG. 3 rotated 45 about the axis;
FIG. 5 is a cross-sectional view of a bearing and hydrostatic lead screw nut assembly according to one or more embodiments of the present disclosure;
FIG. 6 is a schematic illustration of a collector plate configuration according to one or more embodiments of the present disclosure;
FIG. 7 is a schematic structural view of a support stand according to one or more embodiments of the present invention;
FIG. 8 is a schematic view of a base structure of the present invention according to one or more embodiments;
wherein, 1, a base; 101. a guide rail oil discharge groove; 102. a nut component oil drainage groove A; 103. a nut component oil discharge groove B; 104. a base oil discharge groove; 2. a bearing inner ring A; 3. a bearing outer ring A; 301. a bearing oil inlet; 302. an annular oil chamber; 303. an annular oil drain port; 304. a nut oil inlet A; 305. an annular inner groove; 306. a bearing flange; 4. a motor stator; 5. a motor rotor; 6. a fixed seat A; 7. a static pressure screw; 8. a linear guide rail; 9. a guide rail slide block A; 10. a work table; 11. a support frame; 1101. mounting holes A, 1102, a supporting plate, 1103, mounting plates, 1104 and matching holes; 12. a static pressure screw nut; 1201. an oil inlet annular groove; 1202. a nut oil inlet B; 1203. an oil outlet annular groove; 1204. an oil outlet hole of the nut; 1205. a nut flange; 1206. a restrictor; 13. a bearing inner ring B; 14. a bearing outer ring B; 15. a guide rail slide block B; 16. a fixed seat B; 17. a seal ring; 18. an oil collecting plate; 1801. a mounting hole B; 1802. an oil receiving hole; 1803. oil baffle plate.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "up", "down", "left" and "right" in this application, if any, merely indicate correspondence with the directions of up, down, left and right of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.
The terms "mounted", "connected", "fixed", and the like in the present application should be understood broadly, and for example, the terms "mounted", "connected", and "fixed" may be fixedly connected, detachably connected, or integrated; the two components can be connected directly or indirectly through an intermediate medium, or the two components can be connected internally or in an interaction relationship, and the terms can be understood by those skilled in the art according to specific situations.
The first embodiment is as follows:
the embodiment provides an integrated hydrostatic nut main drive type screw pair linear feeding unit, as shown in fig. 1, the integrated hydrostatic nut main drive type screw pair linear feeding unit comprises a hollow motor, a nut assembly, a hydrostatic screw 7, a hydrostatic guide rail, a workbench 10, hydrostatic screw fixing seats and a base 1, wherein the two hydrostatic screw fixing seats are respectively a fixing seat A6 and a fixing seat B16; the fixing seat A6 is installed at one end of the base 1, and the fixing seat B16 is installed at the other end of the base 1. The nut component is in threaded connection with the static pressure screw rod 7, and the hollow motor is installed on one side of the nut component. One end of the static pressure screw 7 is connected with a fixed seat A6, and the other end is connected with a fixed seat B16. The nut component is connected with a workbench 10 through a support frame 11, and the workbench 10 is connected with a hydrostatic pressure guide rail.
Specifically, as shown in fig. 2, the hydrostatic guide rail includes a guide rail slider a9, a guide rail slider B15, and a linear guide rail 8, the linear guide rail 8 is parallel to the hydrostatic lead screw 7, and the guide rail slider a9 and the guide rail slider B15 are slidably connected to the linear guide rail 8. The table 10 is connected above the rail slider a9 and the rail slider B15.
The nut component comprises a bearing and a static pressure screw nut 12, and two ends of the static pressure screw nut 12 are respectively provided with the bearing, namely a bearing A and a bearing B. The bearing A comprises a bearing inner ring A2 and a bearing outer ring A3, and the bearing B comprises a bearing inner ring B13 and a bearing outer ring B14. In this embodiment, the bearing is a hydrostatic composite bearing.
The static pressure lead screw 7 is in threaded engagement with the hydrostatic nut 12, two ends of the outer surface of the hydrostatic lead screw nut 12 are in interference fit with a bearing inner ring A2 and a bearing inner ring B13 respectively, and the bearing inner ring A2 and a bearing outer ring A3 are supported through a liquid oil film; the bearing inner ring B13 and the bearing outer ring B14 are supported by a liquid oil film. The bearing outer ring A3 is detachably connected with one side of the support frame 11, and the bearing outer ring B14 is detachably connected with the other side of the support frame 11.
The hollow motor comprises a motor stator 4 and a motor rotor 5, the motor stator 4 is in a hollow cylindrical shape, and the static pressure screw 7 can penetrate through the hollow part of the motor stator 4. As shown in fig. 3-5, the motor stator 4 is engaged with the bearing outer ring a3 through the bearing flange 306, and the motor rotor 5 is connected with the static pressure screw nut 12 through the nut flange 1205. The motor stator 4 and the motor rotor 5 form a closed-loop servo drive control. Because the two bearings play a role in radially and axially supporting the static pressure screw nut 12, the hollow motor does not need to be provided with the bearings.
The bearing outer ring A3 is provided with nut oil inlets A304, the nut oil inlets A304 are uniformly distributed along the circumferential direction of the bearing outer ring A3, and the opening direction of each nut oil inlet A304 is along the radial direction of the bearing outer ring A3. An annular inner groove 305 is formed in the bearing outer ring A3, and the nut oil inlet A304 is communicated with the annular inner groove 305. The bearing outer ring A3 is further provided with bearing oil inlets 301 which are uniformly distributed along the circumferential direction, and the opening direction of the bearing oil inlets 301 is along the radial direction of the bearing outer ring A3.
An annular oil chamber 302 is arranged on one side of the bearing outer ring A3 close to the bearing inner ring A2, and the annular oil chamber 302 can be an annular cavity or a plurality of fan-shaped cavities which are arranged at intervals to form an annular shape. Annular oil cavity 302 is angled from the axis of bearing cup a3 to provide radial and axial support for hydrostatic lead screw nut 12.
A gap is reserved between the bearing outer ring A3 and the bearing inner ring A2, an annular oil drain port 303 is arranged, and the annular oil drain port 303 and the bearing oil inlet 301 are respectively communicated with the annular oil cavity 302. The bearing outer ring A3 supplies oil to the annular oil cavity 302 through the bearing oil inlet 301, and the oil is discharged to the oil collecting plate 18 through the annular oil outlet 303 for recovery.
Bearing outer ring B14 has no bearing flange 306, and the other structures are the same as bearing outer ring A3, and the description is omitted here.
An oil inlet annular groove 1201 which is consistent with the annular inner groove 305 in width is formed in the static pressure lead screw nut 12, and the oil inlet annular groove 1201 is completely matched with the annular inner groove 305 in a corresponding mode and can rotate relatively. And the bearing outer ring A3 and the bearing outer ring B14 are both provided with a sealing ring 17 to ensure good sealing performance so as to realize oil supply from the nut oil inlet A304 to the nut oil inlet B1202.
The static pressure screw nut 12 is also internally provided with nut oil inlets B1202, and the nut oil inlets B1202 are uniformly distributed along the circumferential direction of the static pressure screw nut 12. And a restrictor 1206 is arranged at one end of the nut oil inlet B1202, which is far away from the oil inlet annular groove 1201, and the restrictor 1206 and the nut oil inlet B1202 are consistent and corresponding in number. The nut oil inlet A304, the annular inner groove 305, the oil inlet annular groove 1201, the nut oil inlet B1202 and the throttler 1206 are sequentially communicated, and finally hydraulic oil is conveyed to two sides of the thread of the static pressure screw nut 12 to supply oil to the static pressure screw nut 12.
Oil outlet annular grooves 1203 are respectively formed in the static pressure lead screw nut 12 close to the end faces of the bearing inner ring A2 and the bearing inner ring B13, and the oil outlet annular grooves 1203 are communicated with a plurality of nut oil outlet holes 1204 which are distributed along the circumferential direction of the oil outlet annular grooves 1203. The hydraulic oil in the static pressure lead screw nut 12 flows out to the oil outlet annular groove 1203 through a small gap between the static pressure lead screw 7 and the static pressure lead screw nut 12, and the liquid oil in the oil outlet annular groove 1203 is easily discharged to the oil collecting plate 18 through the nut oil outlet 1204 due to the centrifugal force when the static pressure nut 12 rotates.
As shown in fig. 6, the oil collecting plate 18 is U-shaped, and the inner surface of the oil collecting plate 18 is provided with an oil baffle 1803 adapted to the shape of the oil collecting plate. In this embodiment, two oil baffle plates 1803 are provided, and an oil receiving hole 802 is provided between the oil baffle plates 1803. The side surface of the oil collecting plate 18 near the end is provided with a mounting hole B1801 to connect with the support frame 11. The oil collecting plate 18 is axially positioned through the oil baffle 1803, the oil collecting holes 1802 are positioned at the lowest side (the side far away from the opening end of the oil collecting plate is the lower side) of the oil collecting plate 18, and hydraulic oil flows to the lowest side of the oil collecting plate 18 under the action of self gravity to collect oil.
In order to ensure the coaxiality, the supporting frame 11 is designed as an integral structure. As shown in fig. 7, the supporting frame 11 includes a supporting plate 1102 and two mounting plates 1103 connected together, in this embodiment, there are two mounting plates 1103, and the two mounting plates 1103 are vertically connected to the sides of the supporting plate 1102; the support plate 1102 is a rectangular plate. It is understood that in other embodiments, the support plate 1102 may have other shapes. The two mounting plates 1103 are spaced apart by a distance that is compatible with the size of the oil collecting plate 18.
Furthermore, the mounting plate 1103 has a shape corresponding to the oil collecting plate 18, the mounting plate 1103 has a fitting hole 1104, the diameter of the fitting hole 1104 is corresponding to the diameter of the bearing inner ring a2 (bearing inner ring B13), and the bearing outer ring A3 (bearing outer ring B14) is connected to the mounting plate 1103 by bolts. The side surface of the mounting plate 1103 is provided with a mounting hole a1101, the mounting hole a1101 corresponds to the mounting hole B1801 of the oil collecting plate 18, and the mounting hole a1101 and the mounting hole B1801 are fixed by bolts. The oil collecting plate 18 is coated on the axial outer side of the mounting plate 1103, and the support frame 11 and the oil collecting plate 18 are matched to form an oil collecting space.
As shown in fig. 8, the longitudinal section of the base 1 is U-shaped, the side wall of the base 1 is provided with a guide rail oil drainage groove 101, the inner side surface of the base 1 is provided with a nut component oil drainage groove a102, a nut component oil drainage groove B103 and a base oil drainage groove 104, the nut component oil drainage groove a102 is arranged along the length direction of the base 1, and the base oil drainage grooves 104 are symmetrically arranged at two sides of the nut component oil drainage groove a 102. The nut component oil drainage groove B103 is vertical to the nut component oil drainage groove A102 and the base oil drainage groove 104 and is communicated with the nut component oil drainage groove A and the base oil drainage groove A; the rail oil drain groove 101 communicates with the base oil drain groove 104.
The hydraulic oil discharged from the hydrostatic guide rail is discharged to the base oil discharge groove 104 through the guide rail oil discharge groove 101, when the nut assembly moves axially along the hydrostatic lead screw 7, the oil collecting plate 18 discharges the recovered oil to the nut assembly oil discharge groove a102 through the oil collecting hole 1802, and then the recovered oil is converged to the base oil discharge groove 104 through the nut assembly oil discharge groove B103, and then the hydraulic oil recovery is completed.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (8)
1. A main driving type lead screw pair linear feeding unit integrated with a liquid static pressure nut is characterized by comprising a static pressure lead screw and a liquid static pressure guide rail which are parallel to each other, wherein a nut component is axially installed on the static pressure lead screw, a hollow motor is installed on one side of the nut component, the nut component comprises a bearing and a static pressure lead screw nut, bearings are respectively installed at two ends of the static pressure lead screw nut, a bearing outer ring of one bearing is connected with a motor stator of the hollow motor through a bearing flange, a motor rotor is matched with the static pressure lead screw nut through a nut flange, two ends of the outer surface of the static pressure lead screw nut are respectively in interference fit with a bearing inner ring, an annular inner groove is formed in; the nut assembly is arranged below the workbench through a support frame, and the workbench is detachably connected with the hydrostatic guide rail; an oil collecting plate is coated on the outer side of the supporting frame to form an oil collecting space, an oil baffle plate is arranged on the inner surface of the oil collecting plate, and an oil collecting hole is formed in the bottom surface of the oil collecting plate; the static pressure lead screw is arranged above the base, and the base is provided with a plurality of oil discharge grooves for discharging oil for the hydrostatic pressure guide rail and the oil collecting plate.
2. The integrated hydrostatic nut primary drive type screw pair linear feed unit of claim 1, wherein the inner surface of the hydrostatic screw nut is in threaded engagement with the hydrostatic screw, and a liquid oil film is supported between the bearing inner ring and the bearing outer ring at two ends of the hydrostatic screw nut.
3. The integrated hydrostatic nut primary drive type screw pair linear feeding unit is characterized in that nut oil inlets A are uniformly formed in the circumferential direction of the bearing outer ring, an annular inner groove is formed in the bearing outer ring, and the nut oil inlets A are communicated with the annular inner groove.
4. The integrated hydrostatic nut primary drive type screw pair linear feed unit of claim 3, wherein the bearing outer ring is further provided with bearing oil inlets uniformly distributed along the circumferential direction, and an annular oil cavity is formed in one side of the bearing outer ring close to the bearing inner ring; a gap is reserved between the bearing outer ring and the bearing inner ring, an annular oil discharge port is formed in the gap, and the annular oil discharge port and the bearing oil inlet are communicated with the annular oil cavity respectively.
5. The integrated hydrostatic nut primary drive type screw pair linear feeding unit is characterized in that an oil inlet annular groove corresponding to the annular inner groove is formed in the hydrostatic screw nut, and the oil inlet annular groove is connected with a plurality of nut oil inlets B arranged along the circumferential direction of the hydrostatic screw nut; and the nut oil inlet B is communicated with the throttler.
6. The integrated hydrostatic nut primary drive type screw pair linear feeding unit as claimed in claim 5, wherein an oil outlet annular groove is formed in the hydrostatic screw nut at a position close to the inner ring of the bearing, and the oil outlet annular groove is communicated with a plurality of nut oil outlet holes distributed along the circumferential direction of the oil outlet annular groove.
7. The integrated hydrostatic nut primary drive type screw pair linear feeding unit is characterized in that the side wall of the base is provided with a guide rail oil drainage groove, the length direction of the base is provided with a nut component oil drainage groove A, and the two sides of the nut component oil drainage groove A are symmetrically provided with base oil drainage grooves; the nut component oil discharge groove A, the base oil discharge groove and the nut component oil discharge groove B are communicated, and the guide rail oil discharge groove and the base oil discharge groove are communicated.
8. The integrated hydrostatic nut primary drive lead screw pair linear feed unit of claim 1, wherein the support frame comprises a support plate and a mounting plate which are connected into a whole, the support plate is connected with the workbench, and the mounting plate is connected with the oil collecting plate and the bearing outer ring.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010746545.2A CN112077638B (en) | 2020-07-29 | 2020-07-29 | Linear feeding unit of integrated hydrostatic nut main drive type lead screw pair |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010746545.2A CN112077638B (en) | 2020-07-29 | 2020-07-29 | Linear feeding unit of integrated hydrostatic nut main drive type lead screw pair |
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| CN112077638A CN112077638A (en) | 2020-12-15 |
| CN112077638B true CN112077638B (en) | 2021-05-11 |
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| CN113938061B (en) * | 2021-09-15 | 2023-10-27 | 安徽理工大学 | Method for reducing speed fluctuation of linear feeding system |
| CN113894594B (en) * | 2021-12-08 | 2022-04-01 | 山东大学 | Combined nut-driven hydrostatic lead screw pair, servo feeding system and method |
| CN114714141B (en) * | 2022-06-09 | 2022-09-06 | 北京博鲁斯潘精密机床有限公司 | High-precision aviation blade tenon machining machine tool with driving screw rod supporting structure |
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| CN105598732A (en) * | 2016-02-29 | 2016-05-25 | 山东大学 | Electric linear feeding unit and assembling method thereof |
| CN207710294U (en) * | 2018-01-08 | 2018-08-10 | 甘肃机电职业技术学院（甘肃省机械工业学校、甘肃省机械高级技工学校） | A kind of machine tool fluid pressure guide rail oil return apparatus |
| CN108788878A (en) * | 2018-05-04 | 2018-11-13 | 青岛科技大学 | A kind of driving static-pressure lead screw pair of nut |
| CN209887101U (en) * | 2019-06-04 | 2020-01-03 | 江西江重机床有限公司 | Plastic belt and static pressure type composite guide rail |
| CN110554659A (en) * | 2019-08-07 | 2019-12-10 | 山东大学 | large-stroke high-precision micro-nano motion servo feeding system and control method |
| CN110594379A (en) * | 2019-08-07 | 2019-12-20 | 山东大学 | Nut driving type hydrostatic lead screw transmission pair and machine tool |
| CN210649471U (en) * | 2019-08-24 | 2020-06-02 | 浙江瓯赛汽车部件铸造有限公司 | Machine tool body |
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