A coreless rotor motor with encoder

Abstract

The present invention provides a coreless rotor motor with an encoder, comprising a stator and a rotor installed in the stator, and also comprising an encoder and an encoding disk; the rotor comprises a magnetic steel frame, magnets, a left pressure cover and a right pressure cover; a plurality of magnetic steel slots are circumferentially distributed on the left and right ends of the magnetic steel frame; a plurality of through holes are circumferentially distributed on the magnetic steel frame; the through holes comprise an insertion portion through hole and a positioning portion through hole connected to one side of the insertion portion through hole; the magnets are inserted into the magnetic steel slots; a plurality of insertion rods are circumferentially distributed on the right side of the left pressure cover; an undercut is provided at the right end of the insertion rod; the insertion rod cooperates with the positioning portion through hole; the undercut can pass through the insertion portion through hole; an air avoidance groove for avoiding the undercut and a positioning protrusion cooperating with the insertion portion through hole are provided on the left side of the right pressure cover; the encoding disk is fixed on the right pressure cover; the encoder is fixed at the right end of the stator and connected to the encoding disk; the present invention is convenient to maintain, light in weight, small in size and has strong structural stability.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a coreless rotor motor with an encoder. Background Art

[0002] A tail-mounted electric spindle structure is often used on machine tool spindles. In the tail-mounted electric spindle, the encoder is usually installed on the connecting flange between the motor and the mechanical spindle assembly, which makes maintenance inconvenient. In addition, the motor pursues miniaturization and lightweight, so a coreless rotor appears. Since the rotor with an iron core is heavy and large, this defect can be solved by eliminating the iron core. However, eliminating the iron core will inevitably require other structures to fix the magnetic frame and design the position for installing the magnet. Currently, the core rod is passed through the magnetic frame, and then the magnetic frame is fixed by pressing the end covers at both ends. The magnet is inserted inside the magnetic frame. Although the rigid structure removes the iron core and fixes the magnetic frame, the structure is not stable. Although the two end covers are fixed at both ends by press-fitting, they may also detach during use, resulting in inability to use normally. Therefore, improvement is still needed. Summary of the Invention

[0003] The object of the present invention is to provide a coreless rotor motor with an encoder to solve the problems mentioned in the background technology.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] A coreless rotor motor with an encoder comprises a stator and a rotor installed in the stator, an encoder and an encoder disk; the rotor comprises a magnetic steel frame, a magnetic steel, a left gland and a right gland; a plurality of magnetic steel slots are circumferentially distributed on the left and right ends of the magnetic steel frame; a plurality of through holes are circumferentially distributed on the magnetic steel frame; the through holes comprise an insertion portion through hole and a positioning portion through hole connected to one side of the insertion portion through hole; the height of the insertion portion through hole is greater than the height of the positioning portion through hole; the magnetic steel is inserted into the magnetic steel slot; a plurality of insertion rods are circumferentially distributed on the right side of the left gland; the The right end of the insertion rod is provided with an undercut; the insertion rod cooperates with the through hole of the positioning part; the undercut can pass through the through hole of the insertion part; the left pressure cover is installed at the left end of the magnetic steel frame, the insertion rod is located in the through hole of the positioning part, and the undercut touches the right end surface of the magnetic steel frame; the left side of the right pressure cover is provided with a space-avoiding groove for avoiding the undercut and a positioning protrusion that cooperates with the through hole of the insertion part; the right pressure cover is pressed into the through hole of the positioning part at the right end of the magnetic steel frame through the positioning protrusion; the right side of the right pressure cover is provided with a convex stop; the encoding disk is fixed on the convex stop; the encoder is fixed at the right end of the stator and connected to the encoding disk.

[0006] A further description of the present invention also includes an encoder cover and a code disc cover; the stator includes a shell, a C-shaped end cover and a side outlet shell; the C-shaped end cover is fixed to the right end of the shell; the side outlet shell is fixed to the right end of the shell and is located at the C-shaped opening of the C-shaped end cover; a plurality of outlet holes are provided on the side outlet shell; the encoder is fixed to the right side of the C-shaped end cover; the encoder cover is provided on the outside of the encoder and fixed on the right side of the C-shaped end cover; a wire passing hole is provided on one side of the encoder cover; the code disc cover is provided on the outside of the code disc and fixed on the right side of the C-shaped end cover; one side of the code disc cover has a gap to avoid the encoder cover.

[0007] Further description of the present invention: a strip-shaped positioning groove is provided on the right side of the C-shaped end cover; a positioning protrusion is provided on the side of the encoder close to the C-shaped end cover; the encoder is positioned by cooperating with the positioning protrusion and the positioning groove and is fixed to the C-shaped end cover by a first screw.

[0008] To further describe the present invention, the coding disk is sleeved at the convex stop position and is fixedly connected to the right gland by a second screw.

[0009] To further describe the present invention, the encoding disc is integrally formed at the convex stop position.

[0010] To further describe the present invention, the through holes and the magnetic steel slots are arranged in an interlaced manner.

[0011] To further describe the present invention, guide slopes are respectively provided on the left and right sides of the right end of the undercut.

[0012] The beneficial effects of the present invention are:

[0013] The magnet of this design is directly inserted into the magnet slot of the magnetic frame, and then the left pressure cover is assembled on the left end of the magnetic frame, the insertion rod passes through the through hole of the positioning part, and is used to touch the right end of the magnetic frame by means of an inverted buckle, and then the right pressure cover is pressed into the right end of the through hole of the insertion part through the positioning protrusion, so that the right pressure cover can be installed and fixed, and the positioning protrusion is also used to touch the side of the right part of the insertion rod to prevent the insertion rod from shifting, thereby fixing the magnetic frame to prevent the magnetic frame from loosening, and having strong stability. In addition, a convex stop is provided on the right pressure cover for installing the encoder disk, and then the encoder is fixed to the right end of the stator and connected to the encoder disk. This structure is used on the tail-mounted electric spindle, which is convenient for maintenance and adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the overall structural diagram of the present invention;

[0015] Figure 2 It is an exploded view of the overall structure of the present invention;

[0016] Figure 3 is an exploded view of the rotor of the present invention;

[0017] Figure 4 It is a left side view of the magnetic steel frame of the present invention;

[0018] Figure 5 This is a structural diagram of the left gland of the present invention;

[0019] Figure 6 It is a structural diagram of the right gland of the present invention. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings:

[0021] like Figure 1-6As shown, a coreless rotor motor with an encoder includes a stator 1 and a rotor 2 installed in the stator 1, and also includes an encoder 3 and an encoding disk 4; the rotor 2 includes a magnetic steel frame 21, a magnetic steel 22, a left pressure cover 23 and a right pressure cover 24; a plurality of magnetic steel slots 211 are circumferentially distributed on the left and right ends of the magnetic steel frame 21; a plurality of through holes 212 are circumferentially distributed on the magnetic steel frame 21; the through holes 212 include an insertion portion through hole 2121 and a positioning portion through hole 2122 connected to one side of the insertion portion through hole 2121; the height H1 of the insertion portion through hole 2121 is greater than the height H2 of the positioning portion through hole 2122, and the bottom surfaces of the insertion portion through hole 2121 and the positioning portion through hole 2122 are located at the same position. On a circumferential surface; the magnetic steel 22 is inserted into the magnetic steel slot 211; a plurality of insertion rods 231 are distributed on the right circumference of the left pressure cover 23; the right end of the insertion rod 231 is provided with an undercut 232; the insertion rod 231 cooperates with the positioning portion through hole 2122; the undercut 232 can pass through the insertion portion through hole 2121; the left pressure cover 23 is installed at the left end of the magnetic steel frame 21, the insertion rod 231 is located in the positioning portion through hole 2122, and the undercut 232 touches the right end surface of the magnetic steel frame 21; the left side of the right pressure cover 24 is provided with an air avoidance groove 241 for avoiding the undercut 232 and a positioning protrusion 242 that cooperates with the insertion portion through hole 2121; the right pressure cover 24 is pressed on by the positioning protrusion 242 The positioning portion through hole 2122 at the right end of the magnetic frame 21; a convex stop 243 is provided on the right side of the right pressure cover 24; the code disk 4 is fixed on the convex stop 243; the encoder 3 is fixed to the right end of the stator 1 and connected to the code disk 4; the magnetic frame 21 is formed by stacking and riveting a plurality of punching sheets. The magnetic steel 22 of this design is directly inserted into the magnetic steel slot 211 of the magnetic frame 21, and then the left pressure cover 23 is assembled on the left end of the magnetic frame 21, and the insertion rod 231 of the left pressure cover 23 is inserted from the positioning portion through hole 2122 until the right end surface of the left pressure cover 23 is attached to the left end of the magnetic frame 21. At this time, the undercut 232 passes through to the right side of the positioning portion through hole 2122, and then goes into the positioning portion through hole 2122. The left pressing cover 23 is rotated sideways so that the insertion rod 231 enters the positioning portion through hole 2122, and the undercut 232 touches the right end of the magnetic steel frame 21, and then the right pressing cover 24 is pressed into the right end of the insertion portion through hole 2121 through the positioning protrusion 242, that is, the right pressing cover 24 can be installed and fixed, and the positioning protrusion 242 is also used to touch one side of the right part of the insertion rod 231 to prevent the insertion rod 231 from shifting, thereby fixing the magnetic steel frame 21 to prevent the magnetic steel frame 21 from loosening, and having strong stability. In addition, a convex stop 243 is provided on the right pressing cover 24 for installing the encoder disk 4, and then the encoder 3 is fixed to the right end of the stator 1 and connected to the encoder disk 4. This structure is used on the tail-mounted electric spindle, which is convenient for maintenance and adjustment.

[0022] It also includes an encoder cover 5 and a code disc cover 6; the stator 1 includes a shell 11, a C-shaped end cover 12 and a side outlet shell 13; the C-shaped end cover 12 is fixed to the right end of the shell 11; the side outlet shell 13 is fixed to the right end of the shell 11 and is located at the C-shaped opening of the C-shaped end cover 12; the side outlet shell 13 is provided with a number of outlet holes 131; the encoder 3 is fixed to the right side of the C-shaped end cover 12; the encoder cover 5 is provided on the outside of the encoder 3 and is fixed on the right side of the C-shaped end cover 12; a wire hole 51 is provided on one side of the encoder cover 5; the code disc cover 6 is provided on the outside of the code disc 4 and is fixed on the right side of the C-shaped end cover 12; one side of the code disc cover 6 has a gap 61 to avoid the air encoder cover 5, and the encoder cover 5 and the code disc cover 6 protect the encoder 3 and the code disc 4. The side outlet method can rationalize the cable layout and facilitate wiring.

[0023] A strip-shaped positioning groove 121 is provided on the right side of the C-shaped end cover 12; a positioning protrusion is provided on the side of the encoder 3 close to the C-shaped end cover 12; the encoder 3 is positioned by cooperating with the positioning protrusion and the positioning groove 121 and is fixed to the C-shaped end cover 12 by fastening with the first screw; by setting the positioning groove 121 and aligning with the positioning protrusion of the encoder 3, the installation position accuracy is improved, and then it can be fastened by the first screw.

[0024] The coding disk 424 can be installed at the position of the convex stop 243 in a detachable or integrally formed manner.

[0025] The detachable connection method is: the encoding disk 424 is sleeved at the position of the convex stop 243 and fixedly connected to the right pressure cover 24 by a second screw.

[0026] The integrally formed connection mode is as follows: the encoding disc 424 is integrally formed at the position of the convex stop 243 .

[0027] According to actual needs, one of the above two methods can be selected. The advantage of the detachable method is that it can be replaced, while the advantage of the one-piece molding method is high stability and high transmission accuracy. This embodiment adopts a detachable connection method.

[0028] The through holes 212 and the magnetic steel slots 211 are arranged in an interlaced manner to improve the stability of the overall structure.

[0029] The left and right sides of the right end of the undercut 232 are respectively provided with guiding inclined surfaces 2321 to facilitate insertion into the insertion portion through hole 2121.

[0030] The above description does not limit the technical scope of the present invention. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A coreless rotor motor with an encoder, comprising a stator and a rotor mounted in the stator, characterized in that: It also includes an encoder and an encoding disk; the rotor includes a magnetic steel frame, a magnetic steel, a left pressure cover and a right pressure cover; a plurality of magnetic steel slots are distributed circumferentially on the left and right ends of the magnetic steel frame; a plurality of through holes are distributed circumferentially on the magnetic steel frame; the through holes include an insertion portion through hole and a positioning portion through hole connected to one side of the insertion portion through hole; the height of the insertion portion through hole is greater than the height of the positioning portion through hole; the magnetic steel is inserted into the magnetic steel slot; a plurality of insertion rods are distributed circumferentially on the right side of the left pressure cover; the right end of the insertion rod is provided with an undercut; the insertion rod and The positioning part through hole cooperates; the undercut can pass through the insertion part through hole; the left pressure cover is installed at the left end of the magnetic steel frame, the insertion rod is located in the positioning part through hole, and the undercut touches the right end surface of the magnetic steel frame; the left side of the right pressure cover is provided with an air avoidance groove for avoiding the undercut and a positioning protrusion that cooperates with the insertion part through hole; the right pressure cover is pressed into the positioning part through hole at the right end of the magnetic steel frame through the positioning protrusion; the right side of the right pressure cover is provided with a convex stop; the code disk is fixed on the convex stop; the encoder is fixed to the right end of the stator and connected to the code disk; It also includes an encoder cover and an encoder disc cover; the stator includes a housing, a C-shaped end cover and a side outlet housing; the C-shaped end cover is fixed to the right end of the housing; the side outlet housing is fixed to the right end of the housing and is located at the C-shaped opening of the C-shaped end cover; the side outlet housing is provided with a plurality of outlet holes; the encoder is fixed to the right side of the C-shaped end cover; the encoder cover is provided on the outside of the encoder and fixed on the right side of the C-shaped end cover; a wire hole is provided on one side of the encoder cover; the encoder disc cover is provided on the outside of the encoder and fixed on the right side of the C-shaped end cover; one side of the encoder disc cover has a notch to avoid the encoder cover; The through holes and the magnetic steel slots are arranged alternately.

2. A coreless rotor motor with an encoder according to claim 1, characterized in that: A strip-shaped positioning groove is provided on the right side of the C-shaped end cover; a positioning protrusion is provided on the side of the encoder close to the C-shaped end cover; the encoder is positioned by the positioning protrusion and the positioning groove and is fixed to the C-shaped end cover by a first screw.

3. The coreless rotor motor with encoder according to claim 1, characterized in that: The coding disk is sleeved at the convex stop position and is fixedly connected to the right gland by a second screw.

4. A coreless rotor motor with an encoder according to claim 1, characterized in that: The encoding disc is integrally formed at the convex stop position.

5. The coreless rotor motor with encoder according to claim 1, characterized in that: The left and right sides of the right end of the undercut are respectively provided with guiding inclined surfaces.

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