CN216086283U

CN216086283U - Integrated rotor shaft sleeve and disc type motor with same

Info

Publication number: CN216086283U
Application number: CN202122793300.8U
Authority: CN
Inventors: 陶骏
Original assignee: Shanghai Futian Electric Technology Co ltd
Current assignee: Shanghai Futian Electric Technology Co ltd
Priority date: 2021-11-15
Filing date: 2021-11-15
Publication date: 2022-03-18
Anticipated expiration: 2031-11-15

Abstract

The utility model relates to an integrated rotor shaft sleeve and a disc type motor with the same, which comprise a shaft sleeve, a mounting seat arranged on the shaft sleeve and an oil cylinder flange arranged at the end part of the shaft sleeve, wherein the mounting seat is arranged on the annular surface of the shaft sleeve and extends outwards along the radial direction; the rotor shaft sleeve is installed in a disk motor. The mounting seat, the oil cylinder flange, the magnetic ring mounting position and the rotor mounting position are simultaneously formed on the shaft sleeve to form a whole, the jumping tolerance can be controlled in the machining process to enable the jumping tolerance to meet the requirement, only the relative position of the stator and the rotor needs to be ensured in the mounting process, the mounting difficulty is reduced, and meanwhile, the precision of the machine tool spindle can be improved by adopting the motor.

Description

Integrated rotor shaft sleeve and disc type motor with same

Technical Field

The utility model relates to the technical field of motors, in particular to an integrated rotor shaft sleeve and a disc type motor with the same.

Background

At present, in the field of numerical control machine tools, the rotation of a main shaft needs to be driven by a motor, most of the main shaft is driven by combining a belt and a belt pulley, the structure has the defects that high speed cannot be realized, the positioning precision of the main shaft is poor, the servo dynamic response is poor, the miniaturization of the machine tool structure cannot be realized, and the like, in order to overcome the defect, the combination of the belt and the belt pulley is eliminated in the industry of the numerical control machine tools to form an electric main shaft structure, the electric main shaft structure is a new technology for integrating a machine tool main shaft and the motor into a whole, at present, a plurality of built-in electric main shafts are used in the market, a stator and a rotor of the motor are integrated on the main shaft, and the main defects of the motor with the structure are that 1, the maintenance of the main shaft after sale is difficult; 2. the original machine tool main shaft can not be used and needs to be completely replaced, so that a large amount of original resources are wasted; 3. the built-in motor generates heat and is not easy to dissipate heat, so that the precision of the spindle is reduced; 4. the rigidity of the main shaft is deteriorated; 5. the structure is complex and the manufacture is difficult; 6. the machine tool needs to be re-dimensioned.

In order to solve the defects, an electric spindle with an external motor is arranged on the market at present, the size of the spindle box is not changed, the spindle box is convenient to replace, the spindle does not generate heat to influence the precision, but the external motor adopts a cantilever structure, the axial size is longer, the volume of the motor is larger, and the precision is reduced; meanwhile, when the motor is installed on a machine tool spindle, the encoder, the oil cylinder and the brake disc are required to be connected with the machine tool spindle respectively, functional components such as the encoder, the oil cylinder and the brake disc have high requirements on installation and machining precision, and if the jumping tolerance between the functional components and the machine tool spindle does not reach the standard in the installation process, the use of the motor is influenced, and the precision of the machine tool spindle is influenced.

Disclosure of Invention

The utility model aims to provide an integrated rotor shaft sleeve convenient to mount and process and a disc type motor with the same.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the integrated rotor shaft sleeve comprises a shaft sleeve body, a mounting seat arranged on the shaft sleeve body and an oil cylinder flange arranged at the end portion of the shaft sleeve body, wherein the mounting seat is arranged on the annular surface of the shaft sleeve body and extends outwards along the radial direction, a magnetic ring mounting position used for mounting a magnetic ring of an encoder and a rotor mounting position used for mounting a rotor iron core are arranged on the shaft sleeve body, and the mounting seat, the oil cylinder flange, the magnetic ring mounting position and the rotor mounting position are formed on the shaft sleeve body in a material removing and processing mode.

Further specifically, the shaft sleeve comprises a small ring column and a large ring column, a transition arc section is arranged at the joint of the small ring column and the large ring column, the rotor mounting position is arranged on the small ring column, the magnetic ring mounting position and the mounting seat are arranged on the large ring column, and the oil cylinder flange is arranged on the end face of the large ring column.

More specifically, a bulge is extended outwards from one side of the large column close to the end face in the radial direction, a step is formed between the bulge and the large column, and the mounting seat is arranged on the bulge.

Further specifically, a plurality of first fixing through holes which are uniformly distributed are formed in the protrusion in the axial direction.

Further specifically, a plurality of second fixing through holes which are uniformly distributed are formed in the mounting seat.

Further specifically, the contact position of the mounting seat and the protrusion is in arc transition.

More specifically, at least one key groove is formed in the inner surface of the shaft sleeve.

A disc type motor comprises a stator and a rotor, wherein the stator comprises a motor shell and a stator core arranged in the motor shell, the rotor comprises a rotor shaft sleeve and a rotor core arranged on the rotor shaft sleeve, a magnetic ring is arranged on a magnetic ring mounting position, a reading head is arranged on the stator, the reading head is matched with the magnetic ring, and a brake disc is arranged on the mounting seat.

More specifically, a labyrinth seal group is arranged at the position where the rotor shaft sleeve is closest to the motor shell.

More specifically, the labyrinth seal group comprises a labyrinth groove arranged on the rotor shaft sleeve and labyrinth teeth arranged on the motor shell, and the labyrinth teeth are inserted into the labyrinth groove

The utility model has the beneficial effects that: the mounting seat, the oil cylinder flange, the magnetic ring mounting position and the rotor mounting position are simultaneously formed on the shaft sleeve to form a whole, the jumping tolerance can be controlled in the machining process to enable the jumping tolerance to meet the requirement, only the relative position of the stator and the rotor needs to be ensured in the mounting process, the mounting difficulty is reduced, and meanwhile, the precision of the machine tool spindle can be improved by adopting the motor.

Drawings

FIG. 1 is a schematic structural view of a rotor bushing of the present invention;

FIG. 2 is a schematic cross-sectional view of a rotor bushing of the present invention;

fig. 3 is a schematic structural view of a disc motor of the present invention;

FIG. 4 is a schematic cross-sectional view of the disc motor of the present invention;

fig. 5 is an enlarged schematic view of a portion a in fig. 4.

In the figure: 1. a shaft sleeve; 2. a mounting seat; 3. an oil cylinder flange; 4. a magnetic ring mounting position; 5. a rotor mounting position; 6. a motor housing; 7. a stator core; 8. a rotor core; 9. a magnetic ring; 10. a read head; 11. a small ring column; 12. a large ring column; 13. a transition arc section; 14. a first through hole; 15. a second through hole; 16. a protrusion; 17. a step; 18. a keyway; 19. a labyrinth groove; 21. a third fixing through hole; 161. a first fixing through hole; 162. a second fixing through hole; 61. a cover plate; 62. a labyrinth tooth.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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 invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should 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; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1 and 2, the integrated rotor shaft sleeve includes a shaft sleeve 1, a mounting seat 2 disposed on the shaft sleeve 1, and an oil cylinder flange 3 disposed at an end of the shaft sleeve 1, wherein the mounting seat 2 is disposed on an annular surface of the shaft sleeve 1 and extends outward in a radial direction, a magnetic ring mounting position 4 for mounting a magnetic ring of an encoder and a rotor mounting position 5 for mounting a rotor core 8 are disposed on the shaft sleeve 1, and the mounting seat 2, the oil cylinder flange 3, the magnetic ring mounting position 4, and the rotor mounting position 5 are formed on the shaft sleeve 1 by material removing processing. Through the design of the integrated rotor shaft sleeve, the jumping tolerance can be controlled during processing, convenience in subsequent installation is facilitated, and meanwhile maintenance is also convenient.

The shaft sleeve 1 comprises a small ring column 11 and a large ring column 12, a transition arc section 13 is arranged at the joint of the small ring column 11 and the large ring column 12, through holes are formed in the small ring column 11 and the large ring column 12, a first through hole 14 is formed in the small ring column 11, a second through hole 15 is formed in the large ring column 12, the diameter of the second through hole 15 is larger than that of the first through hole 14, the inner surface of the second through hole 15 is inclined and conical, a rotor mounting position 5 is arranged on the small ring column 11, a magnetic ring mounting position 4 and a mounting seat 2 are arranged on the large ring column 12, and an oil cylinder flange 3 is arranged on the end face of the large ring column 12; the transition arc section 13 can ensure that stress concentration does not occur at the joint of the small ring column 11 and the large ring column 12, the rigidity of the rotor shaft sleeve is improved, the first through hole 14 is fixed on a machine tool spindle, and the shaft sleeve 1 rotates along with the rotation of the machine tool spindle.

A bulge 16 extends outwards along the radial direction on one side of the large circular column 12 close to the end face, the bulge 16 is annular and forms a step 17 with the large circular column 12, the magnetic ring installation position 4 is close to the step 17, the magnetic ring 9 can be close to the step 17 when the magnetic ring 9 is installed, the installation seat 2 is arranged on the bulge 16, and the connection position of the installation seat 2 and the bulge 16 is transited through an arc shape so as to reduce the stress concentration at the connection position of the installation seat 2 and the bulge 16.

A first fixing through hole 161 and a second fixing through hole 162 are formed in the protrusion 16, the first fixing through hole 161 and the second fixing through hole 162 are both arranged along the axial direction of the shaft sleeve 1, the first fixing through hole 161 is used for fixing the magnetic ring 9, and the second fixing through hole 162 is used as a connecting hole of the oil cylinder flange 3; the mounting seat 2 is provided with a third fixing through hole 21, and the third fixing through hole 21 is used for connecting a brake disc.

In order to facilitate quick connection with a machine tool spindle, at least one key groove 18 is formed in the first through hole 14 in the small ring column 11, connection is achieved through matching of the key groove 18, the key and the key groove in the machine tool spindle, and in the scheme, two key grooves 18 are symmetrically arranged.

Mounting the rotor bushing to the disc motor based on the above-described structure as shown in fig. 3 and 4 forms a disc motor having an integrally formed rotor bushing, the disc motor including a stator and a rotor, wherein the stator comprises a motor shell 6 and a stator core 7 fixed in the motor shell 6, the rotor comprises the rotor shaft sleeve and a rotor core 8 sleeved on the rotor shaft sleeve, a magnetic ring 9 is arranged on the magnetic ring installation position 4 of the rotor shaft sleeve and is fixed with the first fixing through hole 161 through a screw, a reading head mounting base is arranged on the motor shell 6, a reading head 10 is fixed on the reading head mounting base, the reading head 10 and the magnetic ring 9 are matched to form an encoder, a certain gap is arranged between the reading head 10 and the magnetic ring 9, the gap distance is relatively short, so that the jumping tolerance of the magnetic ring 9 is not required to be too large during installation, and the magnetic ring installation position 4 is machined on the rotor shaft sleeve in advance; meanwhile, in order to conveniently brake the spindle of the machine tool, a brake disc is fixed on the mounting base 2 of the rotor shaft sleeve through a third fixing through hole 21, a brake assembly is mounted on the motor shell 6, and a brake set is matched with the brake disc; an oil cylinder is connected with an oil cylinder flange 3 on the rotor shaft sleeve.

The motor housing 6 is provided with a cavity for accommodating the stator core 7 inside, and a cover plate 61 is formed inward in the radial direction at one end of the motor housing 6, and the cover plate 61 is opened in the middle thereof for inserting the rotor bushing.

Because the working environment of the machine tool spindle is poor, cutting fluid and metal debris can splash, in order to prevent the cutting fluid and the metal debris from entering the motor, as shown in fig. 5, a labyrinth seal group is arranged at the position where the rotor shaft sleeve is closest to the motor shell 6, the labyrinth seal group comprises a labyrinth groove 19 and labyrinth teeth 62, the labyrinth teeth 62 are inserted into the labyrinth groove 19, wherein the labyrinth groove 19 and the labyrinth teeth 62 are matched in two forms, the first form is that if the labyrinth groove 19 is arranged on the rotor shaft sleeve, the labyrinth teeth 62 are arranged on the motor shell 6, and the second form is that if the labyrinth groove 19 is arranged on the motor shell 6, the labyrinth teeth 62 are arranged on the rotor shaft sleeve; this scheme adopts the first form.

The labyrinth groove 19 is arranged at the joint of the large column 12 and the transition arc section 13 in the rotor shaft sleeve, the labyrinth groove 19 faces along the axial direction, the labyrinth teeth 62 are arranged at the end part, close to the rotor shaft sleeve, of the cover plate 61 of the motor shell 6, the labyrinth teeth 62 are arranged along the axial direction, and the labyrinth teeth 62 are inserted into the labyrinth groove 19 to realize the labyrinth sealing effect.

In conclusion, the mounting seat 2, the oil cylinder flange 3, the magnetic ring mounting position 4 and the rotor mounting position 5 are simultaneously formed on the shaft sleeve 1 to form a whole, so that the jumping tolerance can be controlled to meet the requirement in the machining process, the relative position of the stator and the rotor only needs to be ensured in the mounting process, the mounting difficulty is reduced, and meanwhile, the precision of the machine tool spindle can be improved by adopting the disc type motor; the sealing is carried out between the rotor shaft sleeve and the motor shell 6 through the labyrinth seal group, so that cutting fluid and metal scraps are prevented from splashing to the inside of the motor to cause faults, and the safety is further improved.

It is to be emphasized that: the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.

Claims

1. The utility model provides a rotor axle sleeve of integral type, its characterized in that includes axle sleeve (1), sets up mount pad (2) on axle sleeve (1), sets up hydro-cylinder flange (3) in axle sleeve (1) tip, mount pad (2) set up on axle sleeve (1) annular face and outwards stretch out along radial direction axle sleeve (1) on be provided with magnetic ring installation position (4) that are used for installing the encoder magnetic ring and rotor installation position (5) that are used for installing rotor core (8), mount pad (2), hydro-cylinder flange (3), magnetic ring installation position (4) and rotor installation position (5) all take shape on axle sleeve (1) through the mode of going the material processing.

2. The integrated rotor shaft sleeve as claimed in claim 1, wherein the shaft sleeve (1) comprises a small ring column (11) and a large ring column (12), the joint of the small ring column (11) and the large ring column (12) is a transition arc section (13), the rotor mounting position (5) is arranged on the small ring column (11), the magnetic ring mounting position (4) and the mounting seat (2) are arranged on the large ring column (12), and the cylinder flange (3) is arranged on the end surface of the large ring column (12).

3. The one-piece rotor bushing according to claim 2, wherein a protrusion (16) protrudes outward in a radial direction from the side of the large ring post (12) near the end surface, a step (17) is formed between the protrusion (16) and the large ring post (12), and the mounting seat (2) is disposed on the protrusion (16).

4. The one-piece rotor bushing according to claim 3, wherein a plurality of first fixing through holes (161) and second fixing through holes (162) are uniformly distributed in the axial direction on the protrusions (16).

5. The integrated rotor bushing according to claim 1, wherein a plurality of evenly distributed third fixing through holes (21) are provided on the mounting seat (2).

6. The integrated rotor bushing according to claim 2, wherein the contact position of the mounting seat (2) and the protrusion (16) is an arc transition.

7. The one-piece rotor bushing according to claim 1, characterized in that at least one key groove (18) is provided on the inner surface of said bushing (1).

8. A disc motor comprising a stator and a rotor, the stator comprising a motor housing (6) and a stator core (7) disposed in the motor housing (6), characterized in that the rotor comprises an integrated rotor shaft sleeve as claimed in any one of claims 1 to 7 and a rotor core (8) disposed on the rotor shaft sleeve, a magnetic ring (9) is disposed on the magnetic ring mounting location (4), a reading head (10) is disposed on the stator, the reading head (10) is engaged with the magnetic ring (9), and a brake disc is disposed on the mounting base (2).

9. A disc motor according to claim 8, characterized in that a labyrinth seal is provided at the location where the rotor sleeve is closest to the motor housing (6).

10. A disc motor according to claim 9, characterized in that the labyrinth seal group comprises a labyrinth groove (19) provided on the rotor bushing and a labyrinth tooth (62) provided on the motor housing (6), the labyrinth tooth (62) being inserted into the labyrinth groove (19).