CN217529234U

CN217529234U - Large-through-hole high-rigidity high-precision electric spindle

Info

Publication number: CN217529234U
Application number: CN202220690416.0U
Authority: CN
Inventors: 张超; 柯尊锋
Original assignee: Suzhou Maxsin Machine Tool Co ltd
Current assignee: Suzhou Maxsin Machine Tool Co ltd
Priority date: 2022-03-28
Filing date: 2022-03-28
Publication date: 2022-10-04
Anticipated expiration: 2032-03-28

Abstract

The utility model relates to the technical field of machining, and a big through-hole high rigidity high accuracy electricity main shaft is disclosed, including headstock and the main shaft dabber of setting inside the headstock, end connection is in the headstock before the front end of main shaft dabber passes through, and the internally mounted of preceding tip has double-row cylindrical roller bearing, double-row cylindrical roller bearing's interior axle and main shaft dabber are connected, the inside fixed mounting of headstock has synchronous stator and rotor, synchronous stator and rotor links together with the middle zone of main shaft dabber, the other one end of main shaft dabber is passed through the back tip and is connected with the headstock, the terminal fixed mounting of main shaft dabber has the main shaft flange, one side that the main shaft flange is close to the central point is provided with lock nut two, lock nut two is connected with the main shaft dabber, main shaft dabber through-hole diameter is fifty five millimeters, after installation anchor clamps and pull rod, the bar throughput can reach forty five millimeters.

Description

Large-through-hole high-rigidity high-precision electric spindle

Technical Field

The utility model relates to a machining technology field specifically is a big through-hole high rigidity high accuracy electricity main shaft.

Background

An electric spindle is a new technology which integrates a machine tool spindle and a spindle motor into a whole and appears in the field of numerical control machines. The spindle is a set of components, which includes the electric spindle itself and its accessories: the device comprises an electric main shaft, a high-frequency conversion device, an oil mist lubricator, a cooling device, a built-in encoder, a tool changing device and the like. The row cutter type lathe on the current market is generally only suitable for workpieces with the diameter of below 35mm, large-size bars cannot pass through an inner hole of a main shaft, and meanwhile, the rigidity of the main shaft is low, so that a large-through-hole high-rigidity high-precision electric main shaft is provided.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides a big through-hole high rigidity high accuracy electricity main shaft has solved foretell problem.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a big through-hole high rigidity high accuracy electricity main shaft, including headstock and the main shaft dabber of setting in headstock inside, the front end of main shaft dabber passes through preceding tip connection in the main shaft case, and the internally mounted of preceding tip has double-row cylindrical roller bearing, double-row cylindrical roller bearing's interior axle and main shaft dabber are connected, the inside fixed mounting of headstock has synchronous stator and rotor, synchronous stator and rotor links together with the middle zone of main shaft dabber, the other one end of main shaft dabber is connected with the headstock through the back tip, the terminal fixed mounting of main shaft dabber has the main shaft flange, one side that the main shaft flange is close to the central point is provided with lock nut two, lock nut two is connected with the main shaft dabber, main shaft dabber through-hole diameter is fifty five millimeters, after installation anchor clamps and pull rod, the bar throughput can reach forty five millimeters, front and back end bearing supports the main shaft dabber, synchronous stator is installed at main shaft dabber intermediate position, drive main shaft dabber high-speed rotation.

Preferably, the front end part comprises a main shaft front sleeve and a front end cover, the front end cover is fixedly installed on the front end of the main shaft mandrel, a sealing groove and a closed groove are formed in the front end cover, one side of the front end cover is connected with the main shaft front sleeve, a double-row cylindrical roller bearing and an angular contact ball bearing are fixedly installed on the inner wall of one side, close to the central point, of the main shaft front sleeve, and inner shafts of the double-row cylindrical roller bearing and the angular contact ball bearing are connected with the outer wall surface of the main shaft mandrel.

Preferably, the end of the front sleeve of the main shaft is mounted on the spindle core shaft through a first locking nut.

Preferably, the synchronous stator and rotor is provided with a rotor fixing ring, an expansion sleeve gland and an expansion sleeve, and the rotor fixing ring, the expansion sleeve gland and the expansion sleeve are assembled together.

Preferably, the rear end portion comprises a rear end cover and a main shaft rear sleeve, a single-row cylindrical roller bearing is fixedly mounted on the inner wall of one side, close to the main shaft mandrel, of the main shaft rear sleeve, an inner shaft of the single-row cylindrical roller bearing is connected with the outer wall surface of the main shaft mandrel, the rear end cover and the main shaft rear sleeve are assembled together, and an encoder is mounted between the rear end cover and the main shaft flange.

(III) advantageous effects

Compared with the prior art, the utility model provides a big through-hole high rigidity high accuracy electricity main shaft possesses following beneficial effect:

1. this big through-hole high rigidity high accuracy electricity main shaft, main shaft dabber through-hole diameter are fifty five millimeters, and after having installed anchor clamps and pull rod, the bar throughput capacity can reach forty five millimeters, consequently very big increase the diameter of passing through of bar, solved row's on the current market sword type lathe, generally only be applicable to the work piece below the 35mm diameter, the problem of the unable main shaft hole of passing through of large-size bar.

2. The large-through-hole high-rigidity high-precision electric spindle adopts a combination of two rows (DB combination) of a front-end double-row cylindrical roller bearing and an angular contact ball bearing, and a rear-end single-row cylindrical roller bearing, so that the high rotating speed of six thousand rpm can be achieved, and the spindle has high rigidity.

Drawings

Fig. 1 is a schematic structural view of the present invention.

In the figure: 1. a main spindle box; 2. a main shaft front sleeve; 3. a front end cover; 4. a spindle core shaft; 5. a sealing groove; 6. closing the groove; 7. A double-row cylindrical roller bearing; 8. angular contact ball bearings; 9. locking the first nut; 10. synchronizing the stator and the rotor; 11. a rotor fixing ring; 12. a tensioning sleeve; 13. a sleeve expansion gland; 14. a single-row cylindrical roller bearing; 15. locking a second nut; 16. a main shaft flange; 17. An encoder; 18. a rear end cap; 19. the main shaft is sleeved at the back.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, a large-through-hole high-rigidity high-precision electric spindle comprises a spindle box 1 and a spindle mandrel 4 arranged inside the spindle box 1, wherein the front end of the spindle mandrel 4 is connected into the spindle box 1 through a front end part, a double-row cylindrical roller bearing 7 is arranged inside the front end part, an inner shaft of the double-row cylindrical roller bearing 7 is connected with the spindle mandrel 4, a synchronous stator 10 is fixedly arranged inside the spindle box 1, the synchronous stator 10 is connected with a middle area of the spindle mandrel 4, the other end of the spindle mandrel 4 is connected with the spindle box 1 through a rear end part, a spindle flange 16 is fixedly arranged at the tail end of the spindle mandrel 4, a locking nut 15 is arranged on one side, close to a central point, of the spindle flange 16, the locking nut 15 is connected with the spindle mandrel 4, the diameter of the spindle mandrel 4 is fifty-five mm, after a clamp and a pull rod are installed, the rod passing capacity can reach forty-five mm, the front end bearing and the rear end bearing support the spindle mandrel 4, the synchronous stator 10 is arranged at the middle position of the spindle mandrel 4, and drives the spindle 4 to rotate at a high speed.

Further, the front end portion comprises a main shaft front sleeve 2 and a front end cover 3, the front end cover 3 is fixedly installed on the front end of a main shaft core shaft 4, a sealing groove 5 and a sealing groove 6 are formed in the front end cover 3, one side of the front end cover 3 is connected with the main shaft front sleeve 2, a double-row cylindrical roller bearing 7 and an angular contact ball bearing 8 are fixedly installed on the inner wall of the side, close to the central point, of the main shaft front sleeve 2, and inner shafts of the double-row cylindrical roller bearing 7 and the angular contact ball bearing 8 are connected with the outer wall face of the main shaft core shaft 4.

Further, the tail end of the front spindle sleeve 2 is arranged on the spindle mandrel 4 through a first locking nut 9.

Further, a rotor fixing ring 11, an expansion sleeve gland 13 and an expansion sleeve 12 are mounted on the synchronous stator and rotor 10, and the rotor fixing ring 11, the expansion sleeve gland 13 and the expansion sleeve 12 are assembled together.

Furthermore, the rear end portion comprises a rear end cover 18 and a main shaft rear sleeve 19, a single-row cylindrical roller bearing 14 is fixedly mounted on the inner wall of one side, close to the main shaft mandrel 4, of the main shaft rear sleeve 19, an inner shaft of the single-row cylindrical roller bearing 14 is connected with the outer wall surface of the main shaft mandrel 4, the rear end cover 18 and the main shaft rear sleeve 19 are assembled together, and an encoder 17 is mounted between the rear end cover 18 and the main shaft flange 16.

The working principle is that a sealing groove 5, a closed groove 6, a double-row cylindrical roller bearing 7, an angular contact ball bearing 8, a main shaft front sleeve 2, a locking nut I9, a synchronous stator and rotor 10, a rotor fixing ring 11, a tensioning sleeve 12, an expansion sleeve gland 13, a main shaft rear sleeve 19, a single-row cylindrical roller bearing 14 and a locking nut II 15 sequentially penetrate through a main shaft mandrel 4, prepressing of the bearing is adjusted by using a special jig, the bearing is locked by using the locking nut, the rigidity and the rotating speed of bearing support are guaranteed to be in an optimal state, then the whole mandrel is installed in a main shaft box, a front end cover 3 and a rear end cover 18 are used for sealing the mandrel, an encoder 17 and a toothed ring are installed on the rear end cover 18 and used for feeding back the real-time rotating speed and the accurate angle position of the main shaft rotation, the rear end of the main shaft is installed in a main shaft connecting disc 16 and locked by using the locking nut II 15 and used for connecting a hydraulic oil cylinder, the diameter of a through hole of the main shaft mandrel 4 is fifty-five millimeters, and after the fixture and the pull rod are installed, the fixture and the pull rod can reach forty-five millimeters. The combination of the front-end double-row cylindrical roller bearing and the angular contact ball bearing (DB combination) and the rear-end single-row cylindrical roller bearing can reach the high rotating speed of six thousand rpm and enable the spindle to have higher rigidity.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a big through-hole high rigidity high accuracy electricity main shaft, includes headstock (1) and sets up at inside main shaft dabber (4) of headstock (1), its characterized in that: the front end of main shaft dabber (4) passes through the front end connection in headstock (1), and the internally mounted of front end has double-row cylindrical roller bearing (7), and the interior axle and the main shaft dabber (4) of double-row cylindrical roller bearing (7) are connected, the inside fixed mounting of headstock (1) has synchronous stator and rotor (10), synchronous stator and rotor (10) link together with the middle zone of main shaft dabber (4), the other one end of main shaft dabber (4) is passed through the rear end and is connected with headstock (1), the terminal fixed mounting of main shaft dabber (4) has main shaft flange (16), one side that main shaft flange (16) are close to the central point is provided with lock nut two (15), lock nut two (15) are connected with main shaft dabber (4), and main shaft dabber (4) through-hole diameter is fifty five millimeters.

2. The large-through-hole high-rigidity high-precision electric spindle according to claim 1, characterized in that: the front end portion comprises a main shaft front sleeve (2) and a front end cover (3), the front end cover (3) is fixedly installed at the front end of a main shaft core shaft (4), a sealing groove (5) and a closed groove (6) are formed in the front end cover (3), one side of the front end cover (3) is connected with the main shaft front sleeve (2), a double-row cylindrical roller bearing (7) and an angular contact ball bearing (8) are fixedly installed on the inner wall, close to a central point, of one side of the main shaft front sleeve (2), and inner shafts of the double-row cylindrical roller bearing (7) and the angular contact ball bearing (8) are connected with the outer wall face of the main shaft core shaft (4).

3. The large-through-hole high-rigidity high-precision electric spindle according to claim 2, characterized in that: the tail end of the main shaft front sleeve (2) is installed on a main shaft mandrel (4) through a locking nut I (9).

4. The large-through-hole high-rigidity high-precision electric spindle as claimed in claim 1, characterized in that: the synchronous stator and rotor (10) is provided with a rotor fixing ring (11), an expansion sleeve gland (13) and an expansion sleeve (12), and the rotor fixing ring (11), the expansion sleeve gland (13) and the expansion sleeve (12) are assembled together.

5. The large-through-hole high-rigidity high-precision electric spindle as claimed in claim 4, characterized in that: the rear end part comprises a rear end cover (18) and a main shaft rear sleeve (19), a single-row cylindrical roller bearing (14) is fixedly mounted on the inner wall of one side, close to the main shaft mandrel (4), of the main shaft rear sleeve (19), an inner shaft of the single-row cylindrical roller bearing (14) is connected with the outer wall surface of the main shaft mandrel (4), the rear end cover (18) and the main shaft rear sleeve (19) are assembled together, and an encoder (17) is mounted between the rear end cover (18) and a main shaft connecting disc (16).