CN214162594U - Air-float supporting pneumatic tool changing and grinding wheel connecting rod overload protection high-speed inner diameter grinding spindle - Google Patents
Air-float supporting pneumatic tool changing and grinding wheel connecting rod overload protection high-speed inner diameter grinding spindle Download PDFInfo
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- CN214162594U CN214162594U CN202022734111.9U CN202022734111U CN214162594U CN 214162594 U CN214162594 U CN 214162594U CN 202022734111 U CN202022734111 U CN 202022734111U CN 214162594 U CN214162594 U CN 214162594U
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Abstract
The utility model discloses an air-float supporting pneumatic tool changing and grinding wheel extension rod overload protection high-speed inner diameter grinding electric spindle, which comprises an outer shell, an inner shell water jacket, a front air bearing, a rear air bearing, an air-float rotating shaft and a cylinder seat; the air-floating rotating shaft passes through the rear air bearing, the stator coil and the front air bearing; a rotating shaft through hole is formed in the center of the air floatation rotating shaft; the front end of the through hole of the rotating shaft is a tapered hole; the front end of the air floatation rotating shaft is provided with a pneumatic chuck which is matched with the tapered hole and is tapered outside; an unloading grinding wheel connecting rod with a safety protection function is arranged in the pneumatic chuck; the rear end of the pneumatic chuck is provided with a pneumatic tool changing mechanism. The bearing and the rotating shaft are supported by compressed air, so that the requirement of processing a small-size inner hole and rotating at a high speed is met, the service life is long, the vibration is small, the noise is low, and the environment is protected; the grinding wheel component is high in mounting and dynamic balance precision; the automatic tool changing is safe and convenient; the unloading grinding wheel connecting rod with the safe unloading groove is broken first to ensure the safety of the electric spindle when an accident happens, and the use and maintenance cost is low.
Description
Technical Field
The utility model relates to an air bearing support electric main shaft for a high-speed inner diameter grinding machine with a grinding aperture of less than 10 mm.
Background
The inner diameter grinding processing of the bearing ring is to grind the inner diameter or the inner diameter channel of the bearing ring by driving a grinding wheel on a grinding wheel connecting rod through a high-speed electric spindle arranged on internal grinding machine equipment. When the grinding linear speed of the grinding wheel is required to reach 40-65 m/s, good grinding quality and efficiency can be obtained. And the linear velocity of the grinding wheel is less than 30 m/s, which greatly affects the grinding quality, and the grinding efficiency also increases the dressing times and the wear of the grinding wheel. In particular, some special grinding wheels such as Cubic Boron Nitride (CBN), diamond and other high performance grinding wheels cannot be effectively used due to insufficient cutting speed.
The existing electric main shafts for high-speed grinding all adopt high-speed main shaft bearings, and have the defects that (the grinding inner diameter is less than 10 mm):
1. short service life of the main shaft, large vibration, large noise and serious environmental pollution
The diameter of the grinding wheel electric spindle is more than 6mm (even 2-3 mm) below the diameter of the grinding wheel with the diameter of 10mm, namely the diameter of the grinding wheel electric spindle is smaller than the diameter of 6mm, so that the rotating speed of the spindle is required to reach 10 to 30 ten thousand revolutions per minute to obtain good cutting linear speed and efficacy ratio. High speed spindle bearing the high speed rolling friction of the electric spindle bearing can produce great vibration and noise, as well as temperature rise. Obtaining high speeds often requires the use of mist lubrication of the spindle bearings, which also results in significant mist air contamination during operation. The service life of the main shaft bearing can be greatly reduced when the main shaft bearing works under the condition of approaching the limit rotating speed.
2. Poor dynamic rigidity and low bearing capacity
In order to obtain higher limit rotating speed, the main shaft can only select a smaller-size main shaft bearing, so that the size of the electric main shaft rotating shaft is reduced, the rigidity of the main shaft is particularly reduced, the bearing capacity is reduced, and the grinding efficiency and the grinding quality are influenced. Also the lifetime is affected.
3. The grinding wheel connecting rod is manually assembled and disassembled, and has low efficiency, poor consistency, poor precision and poor dynamic balance
At present, the inner diameter of the inner circle grinding wheel is 10mm, and the inner circle grinding wheel is small in diameter and is connected with the connecting rod in two ways: one is through flange terminal surface, guide pillar location and threaded connection, and the other kind polished rod inserts and compresses tightly with the jackscrew in the sleeve, and the main shortcoming is that manual operation inefficiency, uniformity are poor, precision and dynamic balance are not good, therefore influence grinding efficiency and quality. If the operation is not proper, the main shaft is easy to be damaged accidentally.
4. The electric spindle of the high-speed grinding machine has high precision and speed, and the rotating shaft has thin size and is easy to damage by accidental impact
The ferrule inner diameter grinding machine tool mostly adopts a guide chute to finish automatic feeding and discharging by means of transverse pushing of an ejector rod under the action of self weight, and processing and conversion of 10mm small-size ferrules are very quick and are generally one in 4-10 seconds. But the size of the ferrule is small, the weight is light, the phenomena of non-position and clamping occasionally occur in high-speed feeding and discharging, the phenomenon that a grinding wheel connecting rod collides a workpiece also occurs in the process of debugging equipment due to small size space and the like, and if the force exceeds the bearing force of the main shaft, the main shaft can be damaged.
Disclosure of Invention
The utility model discloses the purpose is: the high-speed air-flotation motorized spindle has the advantages of good rigidity, high limit speed, long service life and environmental protection, can realize automatic tool changing and has an unloading protection function, and is used for processing small holes and micro-holes.
The technical scheme of the utility model is that: the air-floatation support pneumatic tool changing and grinding wheel connecting rod overload protection high-speed inner diameter grinding spindle comprises an outer shell, an inner shell water jacket, a front air bearing, a rear air bearing, an air-floatation rotating shaft and a cylinder seat; the outer shell is provided with an inner shell water jacket; a stator coil is arranged in the water jacket of the inner shell; the front end of the water jacket of the inner shell is provided with a front air bearing; the rear end of the water jacket of the inner shell is provided with a rear air bearing; the air floatation rotating shaft penetrates through the rear air bearing, the stator coil and the front air bearing; an air thrust bearing is arranged at the rear end of the air floatation rotating shaft; the front part of the shell is provided with a water inlet, a water outlet, an air inlet and an air cylinder air inlet; the rear end of the outer shell is provided with a cylinder seat; the rear part of the cylinder seat is provided with a cylinder sleeve; the rear end of the cylinder sleeve is provided with a cylinder rear cover; the outlet clamp and the exhaust port joint are arranged on the rear cover of the tail cylinder; a rotating shaft through hole is formed in the center of the air floatation rotating shaft; the front end of the through hole of the rotating shaft is a tapered hole; the diameter of the front port of the conical hole is larger than that of the rear port; the front end of the air floatation rotating shaft is provided with a pneumatic chuck which is matched with the tapered hole and is tapered outside; a protective cover is arranged at the front end of the outer shell; an unloading grinding wheel connecting rod with a safety protection function is arranged in the pneumatic chuck; the tail end of the unloading grinding wheel connecting rod penetrates through the protective cover and is inserted into the pneumatic chuck; and a pneumatic tool changing mechanism is arranged at the rear end of the pneumatic chuck.
Preferably, the pneumatic tool changing mechanism comprises a disc spring, an ejector rod and a return spring; the ejector rod penetrates through the cylinder sleeve, the cylinder seat and the air thrust bearing and extends into a rotating shaft through hole of the air floatation rotating shaft; a disc spring is arranged at the front end of the ejecting rod; at the cylinder seat, the return spring is sleeved on the ejector rod; and a nut is arranged at the tail end of the ejector rod at the position of the cylinder sleeve.
Preferably, a Latin is arranged between the disc spring and the pneumatic chuck; a through hole is formed in the middle of the latin; and the front end of the latin is provided with an external thread locking nut.
Preferably, the front end of the unloading grinding wheel connecting rod is provided with a grinding wheel; the unloading grinding wheel connecting rod is provided with a positioning ring; and a groove is formed in the unloading grinding wheel connecting rod.
Preferably, the groove is provided between the grinding wheel and the retaining ring.
Preferably, the groove is one or more of annular, spiral or strip.
Preferably, the front end of the pneumatic chuck is a multi-petal clamping jaw clamping unloading grinding wheel connecting rod.
Preferably, a thrust adjusting pad is arranged between the air thrust bearing and the rear air bearing; and a sealing gasket is arranged between the air thrust bearing and the cylinder seat.
Preferably, a cylinder sliding sleeve is arranged in the cylinder sleeve; piston sealing gaskets are arranged on two sides of the cylinder sleeve; and air cylinder piston sheets are arranged on two sides of the piston sealing gasket.
Preferably, a pneumatic joint is arranged on the cylinder rear cover.
The utility model has the advantages that:
1. the air main shaft bearing and the rotating shaft are supported by compressed air, so that the rotating speed can reach 10-30 rpm, and even higher linear speed of the small-size inner hole machining grinding wheel can reach more than 40 m/s, the grinding requirement is met, and the production efficiency and the machining precision are greatly improved;
2. the rotating shaft and the bearing are in non-contact air friction, so that the service life is long, the vibration is small, the noise is low, and the environment is protected;
3. the grinding wheel component has high structural installation precision and dynamic balance precision; the automatic tool changing is safe and convenient;
4. the automatic tool changing can realize the establishment of a tool magazine of the grinding wheel assembly, different types of grinding wheels can be replaced according to the requirements, the grinding wheels do not need to be corrected every time, the centralized replacement and correction can be realized, the auxiliary time is reduced, the efficiency is improved, and the comprehensive automatic grinding is realized;
5. the unloading grinding wheel connecting rod with the groove with the safe unloading function is adopted, and when an accident collision occurs in the working process of the electric spindle, the unloading grinding wheel connecting rod is firstly broken to ensure the safety of the electric spindle;
6. the high-speed air electric main shaft grinding head with the unloading grinding wheel connecting rod unloading groove safety protection has low use cost and maintenance cost due to the safety protection.
Drawings
The invention will be further described with reference to the following drawings and examples:
FIG. 1 is a schematic cross-sectional structural view of a high-speed inner diameter grinding electric spindle with air-floating support pneumatic tool changing and grinding wheel connecting rod overload protection;
FIG. 2 is a schematic view of a three-dimensional structure of a high-speed inner diameter grinding spindle with air-floating support pneumatic tool changing and grinding wheel connecting rod overload protection;
FIG. 3 is a schematic structural diagram of an unloading grinding wheel connecting rod for protecting an electric spindle of a high-speed inner diameter grinding machine from overload of a pneumatic tool changing supporting air floatation mechanism and the grinding wheel connecting rod in the scheme;
FIG. 4 is a schematic cross-sectional structure view of an unloading grinding wheel connecting rod of the air-floatation support pneumatic tool changing and grinding wheel connecting rod overload protection high-speed inner diameter grinding electric spindle;
FIG. 5 is a schematic structural view of a pneumatic chuck of the air-floatation support pneumatic tool changing and grinding wheel connecting rod overload protection high-speed inner diameter grinding electric spindle;
wherein: 1-grinding wheel; 2-unloading grinding wheel connecting rod; 3-a positioning ring; 4-a pneumatic chuck; 5-air floatation rotating shaft; 6-external thread locking nut; 7-a protective cover; 8-disc spring; 9-Latin; 10-front air bearing; 11-a lifter bar; 12-air inlet pneumatic connection; 13-an outer shell; 14-inner shell water jacket; 15-rear air bearing; 16-a thrust adjustment pad; 17-an air thrust bearing; 18-a seal gasket; 19-a cylinder block; 20-a return spring; 21-cylinder piston plate; 22-piston gasket; 23-cylinder liner; 24-a cylinder sliding sleeve; 25-cylinder rear cover; 26-a nut; 27-a pneumatic joint; 28-vent connection; 29-a stator coil; 30-a water inlet; 31-a water outlet; 32-an air inlet; 33-outlet clamp; 201-grooves; 401-clamping jaw.
Detailed Description
Example (b):
as shown in the attached drawings 1-5, the air-floatation support pneumatic tool changing and grinding wheel extension rod overload protection high-speed inner diameter grinding electric spindle comprises an outer shell 13, an inner shell water jacket 14, a front air bearing 10, a rear air bearing 15, an air-floatation rotating shaft 5 and an air cylinder seat 19; the outer shell 13 is provided with an inner shell water jacket 14; a stator coil 29 is arranged in the inner shell water jacket 14; the front end of the inner shell water jacket 14 is provided with a front air bearing 10; the rear end of the inner shell water jacket 14 is provided with a rear air bearing 15; the air-floatation rotating shaft 5 penetrates through the rear air bearing 15, the stator coil 29 and the front air bearing 10; an air thrust bearing 17 is arranged at the rear end of the air floatation rotating shaft 5; the outer surface of the shell 13 is provided with a water inlet 30, a water outlet 31, a cylinder air inlet 12 and an air inlet 32 near the front part; a cylinder seat 19 is arranged at the rear end of the outer shell 13; a cylinder sleeve 23 is arranged at the rear part of the cylinder seat 19; a cylinder rear cover 25 is arranged at the rear end of the cylinder sleeve 23; the outlet clamp 33 and the exhaust port connector 28 are arranged on the rear cover of the tail cylinder; a thrust adjusting pad 16 is arranged between the air thrust bearing 17 and the rear air bearing 15; a sealing gasket 18 is arranged between the air thrust bearing 17 and the cylinder seat 19; a cylinder sliding sleeve 24 is arranged in the cylinder sleeve 23; piston sealing gaskets 22 are arranged on two sides of the cylinder sleeve 23; the two sides of the piston sealing gasket 22 are provided with cylinder piston sheets 21; the rear cover 25 of the cylinder is provided with a pneumatic connector 27, the cylinder can also intake air from the rear pneumatic connector 27, when the air cylinder is not used, one end of the air cylinder can be plugged by a threaded plug, and the air intake is convenient in the front generally; a rotating shaft through hole is formed in the center of the air floatation rotating shaft 5; the front end of the through hole of the rotating shaft is a tapered hole; the diameter of the front port of the conical hole is larger than that of the rear port; the front end 5 of the air floatation rotating shaft is provided with a pneumatic chuck 4 which is matched with the tapered hole and is tapered outside; a through hole is formed in the middle of the pneumatic chuck 4; an unloading grinding wheel connecting rod 2 with a safety protection function is arranged in the pneumatic chuck 4, and if an electric spindle is collided accidentally in the working process, the unloading grinding wheel connecting rod 2 is firstly broken to unload impact force to protect the electric spindle; the front end of the pneumatic chuck 4 is provided with a four-petal clamping jaw 401 for clamping the unloading grinding wheel connecting rod 2; the front end of the outer shell 13 is provided with a protective cover 7; the tail end of the unloading grinding wheel connecting rod 2 penetrates through the protective cover 7 and is inserted into the pneumatic chuck 4; and a pneumatic tool changing mechanism is arranged at the rear end of the pneumatic chuck 4.
The pneumatic tool changing mechanism comprises a disc spring 8, an ejector rod 11 and a return spring 20; the ejector rod 11 penetrates through the cylinder sleeve 23, the cylinder block 19 and the air thrust bearing 17 and extends into a rotating shaft through hole of the air floatation rotating shaft 5; a disc spring 8 is arranged at the front end of the ejecting rod 11; at the position of the cylinder seat 19, the return spring 20 is sleeved on the ejector rod 11; at the position of the cylinder rear cover 25, the tail end of the ejector rod 11 is provided with a nut 26, and the ejector rod, a cylinder piston sheet 21, a piston sealing gasket 22 and a cylinder sliding sleeve 24 are fixed together; a Latin 9 is arranged between the disc spring 8 and the pneumatic chuck 4; a through hole is formed in the middle of the latin; the front end of the latin 9 is provided with an external thread locking nut 6, and the locking nut and the latin double screw are tightened and prevented and used for adjusting a disc spring pre-tightening gap. The front end of the unloading grinding wheel connecting rod 2 is provided with a grinding wheel 1; the unloading grinding wheel connecting rod 2 is provided with a positioning ring 3; a groove 201 is formed in the unloading grinding wheel connecting rod 2; the groove 201 is arranged between the grinding wheel 1 and the positioning ring 3; the groove 201 is one or more of annular, spiral or strip; the groove 201 is an unloading groove with a safety protection function, and when an electric spindle is collided by accident in the working process (the accident rate of collision of domestic internal diameter grinding machines is 1-2 times/month generally), the unloading grinding wheel connecting rod 2 is firstly broken at the position of the groove 201 with the unloading function, so that the safety of the electric spindle is ensured.
The middle of the pneumatic chuck 4 and the latin 9 is a through hole structure, compressed air is introduced into the cylinder sleeve 23, the cylinder piston sheet 21 pushes the ejector rod 11 to extend forwards and eject to the latin 9 to drive the disc spring 8 to be compressed, the external conical part of the pneumatic chuck 4 moves forwards and is matched with the conical hole at the front end of the air-floating rotating shaft 5 to be loosened, the front end of the pneumatic chuck 4 is the four-petal clamping jaw 401 to expand outwards to loosen the unloading grinding wheel connecting rod 2, and part of the compressed air shunted by the air-floating rotating shaft 5 passes through the middle through hole of the chuck latin 9 to blow the unloading grinding wheel connecting rod 2 out and is placed on the corresponding cutter head seat. And then the replaced unloading grinding wheel connecting rod 2 is inserted into a hole of the pneumatic chuck 4, the positioning ring 3 on the unloading grinding wheel connecting rod 2 ensures the installation position of the grinding wheel rod, the dismounting cylinder 23 is disconnected, the return spring 20 retracts the ejector rod 11, the disc spring 8 pushes the latin 9 to pull the pneumatic chuck 4 backwards, the conical part outside the pneumatic chuck 4 is matched with the conical hole at the front end of the air floatation rotating shaft 5, and the front end of the pneumatic chuck 4 is provided with a four-petal clamping jaw 401 which is internally folded to lock the unloading grinding wheel connecting rod. Provides a safe and convenient operation mode, and can realize comprehensive automatic grinding by matching with corresponding moving or rotating tool magazine to carry out automatic tool changing operation.
The unloading grinding wheel connecting rod 2 is provided with a groove 201 which is elaborately calculated and tested and has a safe unloading effect, when an electric spindle is accidentally collided in the working process (the accident rate of collision of domestic internal diameter grinding machines is 1-2 times/month), the unloading grinding wheel connecting rod is firstly broken to ensure the safety of the electric spindle, and the use cost and the maintenance cost are low due to the safety protection of a high-speed air electric spindle grinding head; the high-speed air-floatation electric main shaft with 10-30 ten thousand revolutions per minute is adopted to reach the limit grinding rotating speed required by the main shaft, particularly, the small hole and micropore grinding (the diameter is less than 10mm, even 2-3 mm), and the non-contact characteristic of the air bearing ensures the high speed and long service life of the main shaft and is environment-friendly; the air-flotation rotating shaft 5 is directly manufactured on the rotating shaft by a special process to be integrated with the rotating shaft, and has compact and reasonable structural size, and the rigidity and the bearing capacity are more advantageous than the structural form of pressing and assembling a rotor on the rotating shaft; the pneumatic chuck 4 with the conical surface outside is used for positioning to ensure the coaxiality precision and the dynamic balance precision of the unloading grinding wheel connecting rod 2 assembly and the consistency of clamping force.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical concepts of the present invention be covered by the claims of the present invention.
Claims (10)
1. Air supporting pneumatic tool changing, emery wheel connect pole overload protection high-speed internal diameter to grind electric main shaft, its characterized in that: comprises an outer shell, an inner shell water jacket, a front air bearing, a rear air bearing, an air floatation rotating shaft and a cylinder seat; the outer shell is provided with an inner shell water jacket; a stator coil is arranged in the water jacket of the inner shell; the front end of the water jacket of the inner shell is provided with a front air bearing; the rear end of the water jacket of the inner shell is provided with a rear air bearing; the air floatation rotating shaft penetrates through the rear air bearing, the stator coil and the front air bearing; an air thrust bearing is arranged at the rear end of the air floatation rotating shaft; the front part of the shell is provided with a water inlet, a water outlet, an air inlet and an air cylinder air inlet; the rear end of the outer shell is provided with a cylinder seat; the rear part of the cylinder seat is provided with a cylinder sleeve; the rear end of the cylinder sleeve is provided with a cylinder rear cover; the outlet clamp and the exhaust port joint are arranged on the rear cover of the tail cylinder; a rotating shaft through hole is formed in the center of the air floatation rotating shaft; the front end of the through hole of the rotating shaft is a tapered hole; the diameter of the front port of the conical hole is larger than that of the rear port; the front end of the air floatation rotating shaft is provided with a pneumatic chuck which is matched with the tapered hole and is tapered outside; a protective cover is arranged at the front end of the outer shell; an unloading grinding wheel connecting rod with a safety protection function is arranged in the pneumatic chuck; the tail end of the unloading grinding wheel connecting rod penetrates through the protective cover and is inserted into the pneumatic chuck; and a pneumatic tool changing mechanism is arranged at the rear end of the pneumatic chuck.
2. The air-bearing supported pneumatic tool changing and grinding wheel extension rod overload protection high-speed inner diameter grinding electric spindle as claimed in claim 1, which is characterized in that: the pneumatic tool changing mechanism comprises a disc spring, an ejector rod and a return spring; the ejector rod penetrates through the cylinder sleeve, the cylinder seat and the air thrust bearing and extends into a rotating shaft through hole of the air floatation rotating shaft; a disc spring is arranged at the front end of the ejecting rod; at the cylinder seat, the return spring is sleeved on the ejector rod; and a nut is arranged at the tail end of the ejector rod at the position of the cylinder sleeve.
3. The air-bearing supported pneumatic tool changing and grinding wheel extension rod overload protection high-speed inner diameter grinding electric spindle as claimed in claim 2, characterized in that: a Latin is arranged between the disc spring and the pneumatic chuck; a through hole is formed in the middle of the latin; and the front end of the latin is provided with an external thread locking nut.
4. The air-bearing supported pneumatic tool changing and grinding wheel extension rod overload protection high-speed inner diameter grinding electric spindle as claimed in claim 1, which is characterized in that: the front end of the unloading grinding wheel connecting rod is provided with a grinding wheel; the unloading grinding wheel connecting rod is provided with a positioning ring; and a groove is formed in the unloading grinding wheel connecting rod.
5. The air-bearing supported pneumatic tool changing and grinding wheel extension rod overload protection high-speed inner diameter grinding electric spindle as claimed in claim 4, characterized in that: the groove is arranged between the grinding wheel and the positioning ring.
6. The air-bearing supported pneumatic tool changing and grinding wheel extension rod overload protection high-speed inner diameter grinding electric spindle as claimed in claim 4, characterized in that: the groove is one or more of annular, spiral or strip.
7. The air-bearing supported pneumatic tool changing and grinding wheel extension rod overload protection high-speed inner diameter grinding electric spindle as claimed in claim 1, which is characterized in that: the front end of the pneumatic chuck is a multi-petal clamping jaw clamping unloading grinding wheel connecting rod.
8. The air-bearing supported pneumatic tool changing and grinding wheel extension rod overload protection high-speed inner diameter grinding electric spindle as claimed in claim 1, which is characterized in that: a thrust adjusting pad is arranged between the air thrust bearing and the rear air bearing; and a sealing gasket is arranged between the air thrust bearing and the cylinder seat.
9. The air-bearing supported pneumatic tool changing and grinding wheel extension rod overload protection high-speed inner diameter grinding electric spindle as claimed in claim 1, which is characterized in that: an air cylinder sliding sleeve is arranged in the air cylinder sleeve; piston sealing gaskets are arranged on two sides of the cylinder sleeve; and air cylinder piston sheets are arranged on two sides of the piston sealing gasket.
10. The air-bearing supported pneumatic tool changing and grinding wheel extension rod overload protection high-speed inner diameter grinding electric spindle as claimed in claim 1, which is characterized in that: and a pneumatic joint is arranged on the cylinder rear cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022734111.9U CN214162594U (en) | 2020-11-24 | 2020-11-24 | Air-float supporting pneumatic tool changing and grinding wheel connecting rod overload protection high-speed inner diameter grinding spindle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022734111.9U CN214162594U (en) | 2020-11-24 | 2020-11-24 | Air-float supporting pneumatic tool changing and grinding wheel connecting rod overload protection high-speed inner diameter grinding spindle |
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| CN214162594U true CN214162594U (en) | 2021-09-10 |
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| CN202022734111.9U Active CN214162594U (en) | 2020-11-24 | 2020-11-24 | Air-float supporting pneumatic tool changing and grinding wheel connecting rod overload protection high-speed inner diameter grinding spindle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114221518A (en) * | 2021-12-09 | 2022-03-22 | 北京航空航天大学 | Superconducting motor system with air bearing structure |
-
2020
- 2020-11-24 CN CN202022734111.9U patent/CN214162594U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114221518A (en) * | 2021-12-09 | 2022-03-22 | 北京航空航天大学 | Superconducting motor system with air bearing structure |
| CN114221518B (en) * | 2021-12-09 | 2023-02-21 | 北京航空航天大学 | Superconducting motor system with air bearing structure |
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