CN222817974U

CN222817974U - A aerostatic main shaft for processing

Info

Publication number: CN222817974U
Application number: CN202421595874.1U
Authority: CN
Inventors: 付丞; 徐庆锋
Original assignee: Ningbo Zhixing Semiconductor Co ltd
Current assignee: Ningbo Zhixing Semiconductor Co ltd
Priority date: 2024-07-08
Filing date: 2024-07-08
Publication date: 2025-05-02
Anticipated expiration: 2034-07-08

Abstract

The utility model belongs to the technical field of aerostatic spindles, in particular to an aerostatic spindle for processing, which comprises a spindle body, wherein the middle part of the spindle body is connected with an air bearing, the right side of the outer surface of the air bearing is connected with an air injection pipe, the top of the spindle body is provided with a squeezing block, the slider is installed to extrusion piece bottom left and right sides, and the feed chute has been seted up near the top to main shaft body surface, and the feed chute bottom is provided with the standing groove, and the guiding gutter has been seted up at standing groove bottom surface middle part, and the lubrication groove has been seted up to guiding gutter bottom left and right sides. This an aerostatic main shaft for processing can place the lubricating oil piece of wax lump parcel to the standing groove inside through the feed chute, utilizes the heat that main shaft body high-speed rotation produced to melt the wax lump, and lubricating oil gets into the lubrication groove along with the guiding gutter, and the lubrication groove will melt lubricating oil get into in the clearance of air bearing and main shaft body through centrifugal force water conservancy diversion to effectively reduce the wearing and tearing when main shaft body and air bearing inner wall contact.

Description

A aerostatic main shaft for processing

Technical Field

The utility model relates to the technical field of aerostatic spindles, in particular to an aerostatic spindle for machining.

Background

At present, high-speed spindles of precision micro-cutting machine tools mainly comprise magnetic suspension electric spindles, liquid dynamic and static piezoelectric spindles, gas suspension electric spindles and the like. The magnetic suspension electric spindle is supported by a magnetic suspension bearing, the liquid dynamic and static pressure electric spindle is supported by a liquid dynamic and static pressure bearing, and the gas suspension electric spindle is supported by a gas static pressure bearing.

The magnetic suspension electric spindle has the advantages of complex mechanical structure, high cost, harsh requirements on environment, high use difficulty, liquid friction of the liquid dynamic and static piezoelectric spindle, high driving power loss, poor control of temperature rise and thermal deformation, low bearing capacity of the gas suspension electric spindle and high process requirements.

The ultra-precise micromachined aerostatic spindle is disclosed in Chinese patent CN212217108U, a first aerostatic radial bearing, a positioning sleeve, a second aerostatic radial bearing and an aerostatic thrust bearing are sequentially sleeved on the spindle body from left to right through a shell and the spindle body, the right end of the spindle body is in threaded connection with a turbine, the outer sides of the first aerostatic radial bearing, the positioning sleeve, the second aerostatic radial bearing and the aerostatic thrust bearing are sleeved with the shell, a plurality of air inlets are formed in the position, corresponding to the turbine, of the right end of the shell, a single-ring radial equidistant air inlet is formed in the right end of the shell to drive the turbine, uniform continuous power is provided for the rotation of the turbine, meanwhile, the end face of a rear end cover of the aerostatic spindle is provided with exhaust holes opposite to the turbine, mixed flow of the air inlet and the exhaust holes is reduced, the air flow loss is reduced, the radial flow type turbine is adopted, the rotation of the aerostatic spindle is more stable, and the torque is further increased.

However, in the prior art, the air static pressure main shaft does not contact the shaft body with the bearing by using an air film in the using process, but in the process of decelerating the main shaft after the main shaft is used, the injected air flow is reduced, and the main shaft can contact with the bearing in the decelerating process, so that collision friction between the shaft bodies is caused, and the main shaft body is easy to damage.

For this reason, it is highly desirable to provide an aerostatic spindle for machining.

Disclosure of utility model

The utility model aims to provide an aerostatic spindle for processing, which solves the problems that in the prior art, an air film is utilized to prevent the spindle body from contacting with a bearing in the using process, but in the process of decelerating the spindle body after the use, the injected air flow is reduced, and the spindle body contacts with the bearing in the decelerating process, so that collision friction between the spindle bodies is caused, and the spindle body is easy to damage.

In order to achieve the aim, the utility model provides the technical scheme that the aerostatic spindle for processing comprises a spindle body, wherein the middle part of the spindle body is connected with an air bearing, the right side of the outer surface of the air bearing is connected with an air injection pipe, the top of the spindle body is provided with an extrusion block, and the left side and the right side of the bottom of the extrusion block are provided with sliding blocks.

Preferably, the middle part of the air bearing is provided with an annular air chamber, and the left side and the right side of the top of the annular air chamber are provided with air pressure grooves.

Preferably, the main shaft body surface is close to the top and has seted up the feed chute, the feed chute bottom is provided with the standing groove, the guiding gutter has been seted up at standing groove bottom surface middle part, the lubrication groove has been seted up to guiding gutter bottom left and right sides.

Preferably, the top surface of the main shaft body is provided with a clamping groove, and the left side and the right side of the bottom of the clamping groove are provided with sliding grooves.

Preferably, the annular air chamber is internally communicated with the air inlet pipe arranged in the middle of the air injection pipe, and the air pressure groove is internally communicated with the middle of the outer surface of the main shaft body. The air flow blown out from the air pressure groove can enter a gap formed by the outer surface of the main shaft body and the inner wall of the air bearing.

Preferably, the inside intercommunication of feed chute and standing groove, standing groove and the inside intercommunication of guiding gutter, guiding gutter and the inside intercommunication of lubrication groove, the inside intercommunication between clearance that forms with air bearing inner wall and main shaft body surface of lubrication groove.

Preferably, the inside of the clamping groove is in sliding connection with the outer surface of the extrusion block, and the inner wall of the sliding groove is in sliding connection with the outer surface of the sliding block. When the main shaft body rotates, the extrusion block and the sliding block can slide in the clamping groove and the sliding groove by utilizing centrifugal force, so that the extrusion block and the sliding block slide outwards with the center of the main shaft body.

Compared with the prior art, the utility model has the beneficial effects that:

1. This an aerostatic main shaft for processing can place the lubricating oil piece of wax lump parcel to the standing groove inside through the feed chute, utilizes the heat that main shaft body high-speed rotation produced to melt the wax lump, and lubricating oil gets into the lubrication groove along with the guiding gutter, and the lubrication groove will melt lubricating oil get into in the clearance of air bearing and main shaft body through centrifugal force water conservancy diversion to effectively reduce the wearing and tearing when main shaft body and air bearing inner wall contact.

2. This an aerostatic main shaft for processing, through the inside sliding connection with extrusion piece of draw-in groove, the inside sliding connection with the slider of spout can make extrusion piece and slider skew when the main shaft body is rotatory, and the power of skew makes extrusion piece can press from both sides tightly fixedly to external structures such as work piece or centre gripping instrument of main shaft body coupling, further improves the stability of connection.

Drawings

FIG. 1 is a schematic view of the appearance of a main structure of the present utility model;

FIG. 2 is a cross-sectional elevation view of the present utility model;

FIG. 3 is a side elevational view in cross-section of the present utility model;

FIG. 4 is a top cross-sectional view of a middle structure of the present utility model;

fig. 5 is an enlarged view of the clamping structure of the present utility model.

In the figure, 1, a main shaft body, 101, an air injection pipe, 102, an air bearing, 103, an extrusion block, 104, a sliding block, 1021, an annular air chamber, 1022, an air pressure groove, 1011, a feeding groove, 1012, a placing groove, 1013, a diversion groove, 1014, a lubrication groove, 1031, a clamping groove, 1032 and a sliding groove.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-5, the present utility model provides a technical solution:

The utility model provides an aerostatic main shaft for processing, includes main shaft body 1, and main shaft body 1 middle part is connected with air bearing 102, and air bearing 102 surface right side is connected with annotates trachea 101, and extrusion piece 103 is installed at main shaft body 1 top, and slider 104 is installed to extrusion piece 103 bottom left and right sides.

The middle part of the air bearing 102 is provided with an annular air chamber 1021, and the left side and the right side of the top of the annular air chamber 1021 and the left side and the right side of the top are provided with air pressure grooves 1022. Inside of the annular chamber 1021 and the gas injection pipe 101 the middle part is provided with an air inlet pipe which is communicated with the inside, the air pressure groove 1022 is communicated with the middle part of the outer surface of the main shaft body 1.

The outer surface of the main shaft body 1 is close to the top and provided with a feed groove 1011, the bottom of the feed groove 1011 is provided with a placing groove 1012, the middle part of the bottom surface of the placing groove 1012 is provided with a diversion groove 1013, and the left side and the right side of the bottom of the diversion groove 1013 are provided with lubrication grooves 1014. The inside of the feed groove 1011 is communicated with the inside of the placing groove 1012, the placing groove 1012 is communicated with the inside of the diversion groove 1013, the diversion groove 1013 is communicated with the inside of the lubrication groove 1014, and the inside of the lubrication groove 1014 is communicated with the inner wall of the air bearing 102 and the outer surface of the main shaft body 1.

The top surface of the main shaft body 1 is provided with a clamping groove 1031, and the left side and the right side of the bottom of the clamping groove 1031 are provided with sliding grooves 1032. The inside of the clamping groove 1031 is slidingly connected with the outer surface of the extrusion block 103, the inner wall of the chute 1032 is slidably coupled to the outer surface of the slider 104.

The lubricating oil blocks wrapped by the wax blocks can be placed in the placing groove 1012 through the feeding groove 1011, the wax blocks are melted by utilizing heat generated by high-speed rotation of the main shaft body 1, lubricating oil enters the lubricating groove 1014 along with the diversion groove 1013, and the lubricating groove 1014 diverts the melted lubricating oil into a gap between the air bearing 102 and the main shaft body 1 through centrifugal force, so that abrasion when the main shaft body 1 contacts with the inner wall of the air bearing 102 is effectively reduced.

Through the sliding connection of the inside of the clamping groove 1031 and the extrusion block 103, the sliding connection of the inside of the sliding groove 1032 and the sliding block 104 can utilize centrifugal force to offset the extrusion block 103 and the sliding block 104 when the main shaft body 1 rotates, and the offset force can enable the extrusion block 103 to clamp and fix external structures such as workpieces or clamping tools connected with the main shaft body 1, so that the connection stability is further improved.

Before the main shaft body 1 is used, the lubricating oil blocks wrapped by the wax blocks are placed into the bottom of the placing groove 1012 through the feeding groove 1011, when the main shaft body 1 is used, the wax blocks can be melted by heat generated by high-speed rotation, so that lubricating oil can flow into the lubricating groove 1014 through the guiding groove 1013, and can flow into a gap between the outer surface of the main shaft body 1 and the inner wall of the air bearing 102 due to centrifugal force through the lubricating groove 1014, so that after the main shaft body 1 is rotated, the lubricating effect is achieved on contact generated between the outer surface of the main shaft body 1 and the inner wall of the air bearing 102 in the decelerating process, and abrasion is reduced.

When processing the connection to work piece or the peripheral hardware that is connected with main shaft body 1, through placing the auxiliary connection structure of peripheral hardware connection structure in draw-in groove 1031 be close to main shaft body 1 surface one side, when main shaft body 1 high-speed rotates, can drive extrusion piece 103 and slider 104 and slide to play the extrusion fixed to work piece or peripheral hardware connecting piece, auxiliary connection's effect, thereby make the process of processing can be more stable.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.

Claims

1. The aerostatic main shaft for machining comprises a main shaft body (1) and is characterized in that an air bearing (102) is connected to the middle of the main shaft body (1), an air injection pipe (101) is connected to the right side of the outer surface of the air bearing (102), an extrusion block (103) is arranged at the top of the main shaft body (1), and sliding blocks (104) are arranged at the left side and the right side of the bottom of the extrusion block (103).

2. The aerostatic spindle for machining according to claim 1, wherein the air bearing (102) is provided with an annular air chamber (1021) in the middle, and air pressure grooves (1022) are formed in the left side and the right side of the top of the annular air chamber (1021) and in the left side and the right side of the top of the annular air chamber.

3. The aerostatic spindle for machining according to claim 1, wherein the outer surface of the spindle body (1) is provided with a feeding groove (1011) close to the top, the bottom of the feeding groove (1011) is provided with a placing groove (1012), the middle of the bottom surface of the placing groove (1012) is provided with a diversion groove (1013), and the left side and the right side of the bottom of the diversion groove (1013) are provided with lubrication grooves (1014).

4. The aerostatic spindle for machining according to claim 1, wherein the top surface of the spindle body (1) is provided with a clamping groove (1031), and the left side and the right side of the bottom of the clamping groove (1031) are provided with sliding grooves (1032).

5. An aerostatic spindle for machining according to claim 2, wherein the inside of the annular air chamber (1021) is communicated with the inside of an air inlet pipe arranged in the middle of the air injection pipe (101), and the inside of the air pressure groove (1022) is communicated with the middle of the outer surface of the spindle body (1).

6. An aerostatic spindle for machining according to claim 3, wherein the interior of the feed channel (1011) is in communication with the interior of the placement channel (1012), the placement channel (1012) is in communication with the interior of the flow guide channel (1013), the flow guide channel (1013) is in communication with the interior of the lubrication channel (1014), and the interior of the lubrication channel (1014) is in communication with the inner wall of the air bearing (102) and the outer surface of the spindle body (1).

7. The aerostatic spindle for machining according to claim 4, wherein the inside of the clamping groove (1031) is slidably connected with the outer surface of the extrusion block (103), and the inner wall of the sliding groove (1032) is slidably connected with the outer surface of the sliding block (104).