A vertical air-static electric spindle

Abstract

This utility model discloses a vertical air-static pressure electric spindle, belonging to the technical field of electric spindles. It includes a sleeve and a housing, with the upper part of the sleeve fixedly connected to the lower part of the housing. The key feature is that a spindle is housed inside the sleeve, and a motor is housed inside the housing. The upper part of the spindle is connected to the motor. A lower steel sleeve is fixedly installed on the lower inner side of the sleeve, and a lower air bearing is installed inside the lower steel sleeve. An upper steel sleeve is fixedly installed on the upper inner side of the sleeve, and an upper air bearing is installed inside the upper steel sleeve. Both the lower and upper air bearings are made of nanoporous carbon. This utility model effectively overcomes the vibration, noise, and heat generation problems caused by traditional bearings in electric spindles, effectively ensuring machining accuracy.

Description

Technical Field

[0001] This utility model relates to the field of electric spindle technology, specifically a vertical air static pressure electric spindle. Background Technology

[0002] The requirements for machining accuracy in fields such as machining and electronic manufacturing are becoming increasingly stringent, and traditional spindles are increasingly unable to meet these demands. Electric spindles have been introduced into the industry, offering advantages such as high speed, stable torque, high precision, and low noise, playing a crucial role in precision machining activities. However, a drawback is that electric spindles still utilize traditional contact bearings, leading to issues such as vibration, heat generation, and noise during operation, which ultimately affect the final machining accuracy. Therefore, how to overcome the vibration, heat generation, and noise problems caused by traditional bearings in electric spindles and ensure machining accuracy has become an urgent problem for relevant technical personnel to solve. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a vertical air static electric spindle.

[0004] A vertical air-static electric spindle includes a sleeve and a housing, with the upper part of the sleeve fixedly connected to the lower part of the housing. The spindle is housed inside the sleeve, and a motor is housed inside the housing. The upper part of the spindle is connected to the motor. A lower steel sleeve is fixedly installed on the lower inner side of the sleeve, and a lower air bearing is installed inside the lower steel sleeve. An upper steel sleeve is fixedly installed on the upper inner side of the sleeve, and an upper air bearing is installed inside the upper steel sleeve. Both the lower and upper air bearings are made of nanoporous carbon.

[0005] Furthermore, a shoulder is provided at the position corresponding to the upper end of the main shaft and the sleeve, and a secondary air bearing is provided between the shoulder and the sleeve. There are two sets of secondary air bearings, which are symmetrically arranged on the upper and lower parts of the shoulder. The material of the secondary air bearing is nanoporous carbon.

[0006] Furthermore, the interior of the nanoporous carbon has a three-dimensional network pore structure with a pore size of 5-50 micrometers.

[0007] Furthermore, a rear cover is fixedly installed on the upper part of the housing, a waterproof aviation connector is fixedly installed on the upper part of the rear cover, and a front cover is fixedly installed on the lower part of the sleeve.

[0008] Furthermore, the motor includes a motor stator and a motor rotor, the motor rotor is rotatably connected to the motor stator, the main shaft is fixedly connected to the motor rotor, a pressure cover is provided on the upper part of the motor rotor, the middle part of the pressure cover is fixedly connected to the main shaft, and the edge of the pressure cover is in contact with the motor rotor.

[0009] The beneficial effects of this utility model of a vertical air-static electric spindle are as follows: 1. The electric spindle is designed to be perpendicular to the main spindle, which effectively reduces the weight on the spindle in the radial direction and provides a good structural foundation for avoiding unnecessary vibration of the spindle; 2. The lower air bearing, upper air bearing, and auxiliary air bearing provide a good structural foundation for the stable support of the spindle by high-pressure gas. The three-dimensional network pore structure inside the nanoporous carbon effectively ensures the uniform overflow of high-pressure gas across the entire surface, effectively ensuring the stability of the gas film between each air bearing and the spindle. In addition, the gas film has a very low coefficient of friction, and there is only gas viscous resistance between it and the spindle, which significantly reduces the micro-vibration when the spindle rotates at high speed. As a result, this electric spindle can overcome the vibration and noise problems caused by traditional bearings and effectively ensure machining accuracy. 3. The air film friction coefficient is extremely low, which effectively reduces the heat generated during the spindle rotation. At the same time, the three-dimensional network pore structure inside the nanoporous carbon effectively improves the thermal conductivity and heat dissipation area, significantly improving the heat dissipation efficiency. As a result, this electric spindle can overcome the heat generation problem caused by traditional bearings and further ensure the machining accuracy. 4. The front cover, sleeve, housing, rear cover, and waterproof aviation connector effectively ensure the airtightness of this electric spindle as a whole. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below, but this is not a limitation on the protection scope of this utility model.

[0011] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0012] Among them, 1-waterproof aviation connector, 2-rear cover, 3-pressure cover, 4-machine housing, 5-shaft shoulder, 6-upper steel sleeve, 7-sleeve, 8-lower steel sleeve, 9-front cover, 10-lower air bearing, 11-main shaft, 12-upper air bearing, 13-auxiliary air bearing, 14-motor rotor, 15-motor stator. Detailed Implementation

[0013] To make the explanation clearer, a vertical air-static electric spindle of this utility model will be further described in conjunction with the accompanying drawings.

[0014] A vertical air-static electric spindle includes a sleeve 7 and a housing 4. The upper part of the sleeve 7 is fixedly connected to the lower part of the housing 4. The spindle 11 is installed inside the sleeve 7, and a motor is installed inside the housing 4. The upper part of the spindle 11 is connected to the motor. A lower steel sleeve 8 is fixedly installed on the lower inner side of the sleeve 7. A lower air bearing 10 is installed inside the lower steel sleeve 8. An upper steel sleeve 6 is fixedly installed on the upper inner side of the sleeve 7. An upper air bearing 12 is installed inside the upper steel sleeve 6. The lower air bearing 10 and the upper air bearing 12 are both made of nanoporous carbon.

[0015] Furthermore, a shoulder 5 is provided at a position corresponding to the upper end of the main shaft 11 and the sleeve 7. An auxiliary air bearing 13 is provided between the shoulder 5 and the sleeve 7. There are two sets of auxiliary air bearings 13, which are symmetrically arranged on the upper and lower parts of the shoulder 5. The material of the auxiliary air bearing 13 is nanoporous carbon.

[0016] Furthermore, the interior of the nanoporous carbon has a three-dimensional network pore structure with a pore size of 5-50 micrometers.

[0017] Furthermore, a rear cover 2 is fixedly installed on the upper part of the housing 4, a waterproof aviation connector 1 is fixedly installed on the upper part of the rear cover 2, and a front cover 9 is fixedly installed on the lower part of the sleeve 7.

[0018] Furthermore, the motor includes a motor stator 15 and a motor rotor 14. The motor rotor 14 is rotatably connected to the motor stator 15. The main shaft 11 is fixedly connected to the motor rotor 14. A pressure cover 3 is provided on the upper part of the motor rotor 14. The middle part of the pressure cover 3 is fixedly connected to the main shaft 11. The edge of the pressure cover 3 is in contact with the motor rotor 14.

[0019] The working principle of this vertical air-static pressure electric spindle is as follows: The electric spindle 11 is fixed in the installation position, and related structures such as milling cutters are fixed to the lower end of the spindle 11. A waterproof aviation connector 1 is connected to an external air source. The external air source supplies high-pressure air to the lower air bearing 10, upper air bearing 12, and auxiliary air bearing 13 through the waterproof aviation connector 1. The vertically positioned spindle 11, combined with the three-dimensional network pore structure inside the nanoporous carbon, allows the high-pressure gas to overflow evenly across the entire surface and be discharged through the gaps between the structures. A dynamic balance is achieved between air supply and exhaust. Under this dynamic balance, the lower air bearing 10, upper air bearing 12, and auxiliary air bearing 13... A stable air film is formed between the bearing 13 and the spindle 11, providing radial and axial stable support for the spindle 11. When the motor is started, the motor rotor 14 drives the spindle 11 to start rotating. The air film has a very low coefficient of friction, and there is only gas viscous resistance between the air film and the spindle 11, which significantly reduces the micro-vibration of the spindle 11 when it rotates at high speed. At the same time, it effectively reduces the heat generated during the rotation of the spindle 11. In addition, the three-dimensional network pore structure inside the nanoporous carbon increases the thermal conductivity and heat dissipation area, which significantly improves the heat dissipation efficiency. As a result, the electric spindle 11 can overcome the problems of vibration, heat generation, and noise caused by traditional bearings, thereby ensuring machining accuracy.

[0020] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. A vertical air-static electric spindle, comprising a sleeve and a housing, wherein the upper part of the sleeve is fixedly connected to the lower part of the housing, characterized in that: The sleeve is equipped with a main shaft, and the housing is equipped with a motor. The upper part of the main shaft is connected to the motor. A lower steel sleeve is fixedly installed on the lower inner side of the sleeve, and a lower air bearing is installed inside the lower steel sleeve. An upper steel sleeve is fixedly installed on the upper inner side of the sleeve, and an upper air bearing is installed inside the upper steel sleeve. Both the lower and upper air bearings are made of nanoporous carbon.

2. A vertical air-static electric spindle according to claim 1, characterized in that, A shoulder is provided at the position corresponding to the upper end of the main shaft and the sleeve. A secondary air bearing is provided between the shoulder and the sleeve. There are two sets of secondary air bearings, which are symmetrically arranged on the upper and lower parts of the shoulder. The material of the secondary air bearing is nanoporous carbon.

3. A vertical air-static electric spindle according to claim 1 or 2, characterized in that, The nanoporous carbon has a three-dimensional network pore structure inside, and the pore size of the pore structure is 5-50 micrometers.

4. A vertical air-static electric spindle according to claim 1, characterized in that, A rear cover is fixedly installed on the upper part of the housing, a waterproof aviation connector is fixedly installed on the upper part of the rear cover, and a front cover is fixedly installed on the lower part of the sleeve.

5. A vertical air-static piezoelectric spindle according to claim 1, characterized in that, The motor includes a motor stator and a motor rotor. The motor rotor is rotatably connected to the motor stator. The main shaft is fixedly connected to the motor rotor. A pressure cover is provided on the upper part of the motor rotor. The middle part of the pressure cover is fixedly connected to the main shaft. The edge of the pressure cover is in contact with the motor rotor.

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