CN218718215U

CN218718215U - Air floatation platform

Info

Publication number: CN218718215U
Application number: CN202222066628.4U
Authority: CN
Inventors: 何清福; 何清理; 陈福潮
Original assignee: Hangzhou Haibei Machinery Co ltd
Current assignee: Hangzhou Haibei Machinery Co ltd
Priority date: 2022-08-03
Filing date: 2022-08-03
Publication date: 2023-03-24
Anticipated expiration: 2032-08-03

Abstract

The utility model discloses an air supporting platform. The air floatation platform comprises a bearing support, a main shaft is arranged in the central axis position in the bearing support, a clamping disc is arranged at the upper part of the main shaft, the diameter of the clamping disc is larger than that of the middle part of the main shaft, a fixing part is arranged at the lower part of the main shaft, and a lower pressing plate is arranged on the fixing part; a bearing base body is arranged in the middle of the inside of the bearing support, a first axial air bearing is fixed on the upper surface of the bearing base body, a second axial air bearing is fixed on the lower surface of the bearing base body, and a longitudinal air bearing is fixed on the inner surface of the bearing base body; the clamping disc is arranged on the first axial air bearing, the middle of the main shaft is in clearance fit with the longitudinal air bearing, and the second axial air bearing is arranged on the lower pressing plate. The utility model discloses make the stability of machine tool machining platform's main shaft obviously promote, the part quality of processing out is effectively guaranteed.

Description

Air floatation platform

Technical Field

The utility model relates to an accurate lathe technical field specifically is an air supporting platform.

Background

The platform in the machine tool machining process is indispensable hardware, a main shaft for supporting can be arranged in the platform, the stability of the main shaft has very important influence on the machining quality of a part to be machined, the main shaft of a traditional machine tool is mainly completed through contact type bearings such as a rolling bearing, a ceramic bearing and a hybrid bearing, the problems of vibration, noise, heat generation, environment pollution, energy consumption increase, short service life and the like frequently occur in the working process, the size of the machined part is difficult to meet the use requirement, although the stability of an electric main shaft developed by related technicians is higher than that of a conventional mechanical main shaft, the problem caused by the contact type bearings is still difficult to solve, and based on the condition, how to enable the main shaft of the machining platform of the machine tool to have stronger stability so as to ensure the machining quality of the machined part becomes a problem which needs to be solved urgently by related technicians.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an air supporting platform can solve the processing quality's of the part that can't guarantee to process that the processing platform of present lathe is unstable to lead to technical problem.

The air floatation platform comprises a bearing support, wherein a main shaft is arranged in a central axis position in the bearing support, a clamping disc is arranged at the upper part of the main shaft, the diameter of the clamping disc is larger than that of the middle part of the main shaft, a fixing part is arranged at the lower part of the main shaft, and a lower pressing plate is arranged on the fixing part; a bearing base body is arranged in the middle of the inside of the bearing support, a first axial air bearing is fixed on the upper surface of the bearing base body, a second axial air bearing is fixed on the lower surface of the bearing base body, and a longitudinal air bearing is fixed on the inner surface of the bearing base body; the clamping disc is arranged on the first axial air bearing, the middle part of the main shaft is in clearance fit with the longitudinal air bearing, and the second axial air bearing is arranged on the lower pressing plate; the clamping disk is also connected with a connecting plate.

Furthermore, the clamping disc is connected with the connecting plate through a fastener.

Further, the upper surface of the connecting plate is provided with a fixing hole; the outer diameter of the connecting plate is the same as that of the bearing support.

Further, the outer edge of the connecting plate can be longitudinally and slidably buckled on the outer surface of the bearing support.

Furthermore, a pressing plate locking block is further arranged below the lower pressing plate and fixedly connected with the fixing part.

Further, the diameter of the lower pressure plate is equal to that of the clamping disc.

Furthermore, a module supporting plate is further arranged below the bearing support and is smoothly connected with the outer surface of the bearing support.

Furthermore, the module supporting plate is cylindrical, and a mounting hole is formed in the outer side of the bottom of the module supporting plate.

Furthermore, a lower cover plate is fixed in the bottom of the module support plate.

Furthermore, the lower pressure plate and the pressure plate locking block are correspondingly arranged in the module support plate; a gap is arranged between the lower cover plate and the fixing part.

The utility model discloses an air supporting platform's beneficial effect does:

1. the upper part, the lower part and the middle part of the main shaft are respectively connected with the first axial air bearing, the second axial air bearing and the longitudinal air bearing, so that the problems of vibration, noise, heating, environmental pollution, energy consumption increase, short service life and the like caused by supporting the main shaft by using a contact bearing are effectively solved, the main shaft is supported by combining a bearing base body arranged in the middle of a bearing support, the stability of the main shaft is obviously improved, and the quality of processed parts is effectively guaranteed;

2. the lower pressing plate and the pressing plate locking block effectively enhance the stability of the lower end of the main shaft, so that the operation stability of the main shaft is ensured, and the stability of the main shaft is further improved.

Therefore, the utility model discloses solved machine tool machining platform effectively and used vibration, noise, the environmental pollution that contact bearing main shaft leads to, increase the energy consumption, the short scheduling problem of life, combined to set up in the support of the bearing base member at bearing bracket middle part to the main shaft for the stability of main shaft obviously promotes, and the part quality of processing out is effectively guaranteed.

Drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings used in the description of the embodiments or the prior art will be briefly described below, but the protection scope of the present invention is not limited thereto.

Fig. 1 is a schematic view of an overall structure of an air floating platform according to an embodiment of the present invention.

Fig. 2 is a bottom view of an air floating platform according to an embodiment of the present invention.

Fig. 3 is a schematic cross-sectional structure view of an air floating platform provided in an embodiment of the present invention.

The bearing comprises a bearing support 1, a main shaft 2, a clamping disc 21, a fixing part 22, a lower pressing plate 3, a bearing base 4, a first axial air bearing 41, a second axial air bearing 42, a longitudinal air bearing 43, a connecting plate 5, a fixing hole 51, a pressing plate locking block 6, a module supporting plate 7, a mounting hole 71 and a lower cover plate 8.

Detailed Description

In order to make the description clearer, the air floating platform of the present invention is further described with reference to the attached drawings. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically, electrically or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1, 2, and 3, an embodiment of the present application provides an air floating platform, including a bearing support 1, a main shaft 2 is disposed at a central axis position inside the bearing support 1, a clamping disc 21 is disposed at an upper portion of the main shaft 2, a diameter of the clamping disc 21 is greater than a diameter of a middle portion of the main shaft 2, a fixing portion 22 is disposed at a lower portion of the main shaft 2, and a lower pressing plate 3 is disposed on the fixing portion 22; a bearing substrate 4 is arranged in the middle of the inside of the bearing bracket 1, a first axial air bearing 41 is fixed on the upper surface of the bearing substrate 4, a second axial air bearing 42 is fixed on the lower surface of the bearing substrate 4, and a longitudinal air bearing 43 is fixed on the inner surface of the bearing substrate 4; the clamping disc 21 is arranged on the first axial air bearing 41, the middle part of the main shaft 2 is in clearance fit with the longitudinal air bearing 43, and the second axial air bearing 42 is arranged on the lower pressing plate 3; the clamping disc 21 is also connected with a connecting plate 5.

In this embodiment, the

air bearings

41, 42, and 43 fixed on the surface of the bearing substrate 4 and disposed around the main shaft 2 in the air floating platform are all air bearing air bearings; the main types of air bearings are: dynamic pressure air bearings, static pressure air bearings, squeeze film bearings and other types of air bearings. The dynamic pressure gas bearing has the same supporting principle as the hydrodynamic pressure bearing, but the gas can be compressed, and the bearing is lubricated by compressible fluid. The action principle of the hydrostatic air bearing is the same as that of the hydrostatic bearing. Typical chokes have small holes, slits, and porous bushings. Variable chokes are also used at high loads. If the air supply pressure, the parameters of the restrictor and the bearing clearance are properly matched, the bearing with high bearing, large scraping degree, small flow and stable work can be obtained. The first axial air bearing 41, the second axial air bearing 42 and the longitudinal air bearing 43 of the air floating platform described herein are specifically static pressure air bearings.

In this embodiment, the chuck plate 21 is connected to the connecting plate 5 by a fastener.

In this embodiment, the upper surface of the connecting plate 5 is provided with a fixing hole 51; the fixing hole 51 may be used to fix a member to be processed. The outer diameter of the connecting plate 5 is the same as the outer diameter of the bearing bracket 1.

In this embodiment, the outer edge of the connecting plate 5 can be longitudinally slidably buckled on the outer surface of the bearing bracket 1.

In this embodiment, a pressing plate locking block 6 is further disposed below the lower pressing plate 3, and the pressing plate locking block 6 is fixedly connected to the fixing portion 22.

In the present embodiment, the diameter of the lower platen 3 is equal to the diameter of the chuck disk 21.

In this embodiment, a module supporting plate 7 is further disposed below the bearing bracket 1, and the module supporting plate 7 is smoothly connected with the outer surface of the bearing bracket 1.

In this embodiment, the module supporting plate 7 has a cylindrical shape, and the bottom outer side of the module supporting plate 7 is provided with a mounting hole 71. The mounting hole 71 can realize connection and fixation with a machine tool.

In this embodiment, a lower cover plate 8 is further fixed in the bottom of the module support plate 7. The lower cover plate 8 seals the opening in the bottom of the module support plate 7, and the lower cover plate 8 can be detached to form an access opening.

In this embodiment, the lower press plate 3 and the press plate locking block 6 are both correspondingly arranged in the module support plate 7; a gap is arranged between the lower cover plate 8 and the fixing part 22.

In this embodiment, the first axial air bearing 41, the second axial air bearing 42 and the longitudinal air bearing 43 are all made of a nano porous carbon material, and the air intake mode is nano porous penetration. The air bearing can greatly improve the rigidity of the bearing, the bearing is not easy to damage due to the material of the bearing, local damage can be self-repaired, and the air inlet mode of the bearing is nano-porous penetration, so that the bearing can form a filtering device, and particles in a pipeline can be prevented from entering the bearing and the position of the main shaft 2 to damage and clamp the shaft; the rigidity of the bearing can reach 20N/cm through multiple examinations ² The rigidity is greatly increased compared with the common orifice throttling, and the damage frequency of the bearing main shaft 2 can be greatly reduced; the long-term use and maintenance-free are really realized.

In the embodiment, the air-flotation hydrostatic bearing is made of the nano porous material, the material has good air permeability, the air permeability can be adjusted according to the material formula pressing process, the nano porous material is not hard, the spindle cannot be damaged when being slightly contacted with the spindle, a high-pressure air film is arranged between the bearing and the spindle when the hydrostatic bearing works, trace impurities can be automatically discharged, and the service life of the spindle bearing is greatly prolonged.

The positions between the first axial air bearing 41, the second axial air bearing 42 and the longitudinal air bearing 43 and the main shaft 13 are positions where the air pressure exists after the air pressure bearing is ventilated, and the main shaft cannot rotate at the positions where the air pressure does not exist when the air pressure does not exist, and the main shaft is suspended at the positions where the air pressure exists after the air pressure is ventilated, so that the static pressure air bearing has high bearing characteristics and is a static pressure air bearing.

The air-floating platform of the embodiment has the following use characteristics:

1. extremely low friction resistance

Since gas is much less viscous than liquid, air is only one-fifths of the viscosity of machine oil No. 10 at room temperature, and the friction of bearings is proportional to viscosity, gas bearings have lower friction than liquid lubricated bearings.

2. Wide speed range

The gas bearing has low friction resistance and low temperature rise, and when the rotating speed is up to 5 ten thousand rpm, the temperature rise is not more than 20-30 ℃, and the rotating speed is even up to 130 ten thousand rpm. Aerostatic bearings can also be used for very low speeds, even zero speed.

3. Wide applicable temperature range

The gas can be kept in a gaseous state in a very large temperature range, the viscosity of the gas is slightly influenced by the temperature (the viscosity is slightly increased when the temperature is increased, for example, the temperature is increased from 20 ℃ to 100 ℃, and the viscosity of the air is increased by 23%), and therefore, the applicable temperature range of the gas bearing can reach-265 ℃ to 1650 ℃.

To sum up, the utility model discloses an air supporting platform's beneficial effect does:

The above is only the specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the creative work should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.

Claims

1. An air-floating platform, which is characterized in that: the clamping device comprises a bearing support (1), wherein a main shaft (2) is arranged at the central axis position in the bearing support (1), a clamping disc (21) is arranged at the upper part of the main shaft (2), the diameter of the clamping disc (21) is larger than that of the middle part of the main shaft (2), a fixing part (22) is arranged at the lower part of the main shaft (2), and a lower pressing plate (3) is arranged on the fixing part (22); a bearing base body (4) is arranged in the middle of the interior of the bearing support (1), a first axial air bearing (41) is fixed on the upper surface of the bearing base body (4), a second axial air bearing (42) is fixed on the lower surface of the bearing base body (4), and a longitudinal air bearing (43) is fixed on the inner surface of the bearing base body (4); the clamping disc (21) is arranged on the first axial air bearing (41), the middle part of the main shaft (2) is in clearance fit with the longitudinal air bearing (43), and the second axial air bearing (42) is arranged on the lower pressing plate (3); the clamping disc (21) is also connected with a connecting plate (5).

2. The air-bearing platform as claimed in claim 1, wherein the clamping disk (21) is connected to the connecting plate (5) by fasteners.

3. The air-floating platform as claimed in claim 2, wherein the upper surface of the connecting plate (5) is provided with fixing holes (51); the outer diameter of the connecting plate (5) is the same as that of the bearing support (1).

4. The air-bearing platform as claimed in claim 2, wherein the outer edge of the connecting plate (5) is longitudinally slidably fastened to the outer surface of the bearing bracket (1).

5. The air-floating platform as claimed in claim 1, wherein a clamp plate locking block (6) is further disposed below the lower clamp plate (3), and the clamp plate locking block (6) is fixedly connected to the fixing portion (22).

6. An air-floating platform according to claim 1, characterised in that the diameter of the lower pressure plate (3) is equal to the diameter of the clamping disk (21).

7. The air-floating platform according to claim 5, characterized in that a module support plate (7) is further arranged below the bearing support (1), and the module support plate (7) is smoothly connected with the outer surface of the bearing support (1).

8. The air-floating platform as claimed in claim 7, wherein said module support plate (7) is cylindrical, and the bottom outer side of said module support plate (7) is provided with mounting holes (71).

9. The air-floating platform according to claim 7, characterized in that a lower cover plate (8) is further fixed in the bottom of said module support plate (7).

10. The air-floating platform as claimed in claim 9, wherein said lower pressure plate (3) and said pressure plate locking block (6) are disposed correspondingly in said module support plate (7); a gap is arranged between the lower cover plate (8) and the fixing part (22).