CN210053254U - Servo motor - Google Patents
Servo motor Download PDFInfo
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- CN210053254U CN210053254U CN201920180492.5U CN201920180492U CN210053254U CN 210053254 U CN210053254 U CN 210053254U CN 201920180492 U CN201920180492 U CN 201920180492U CN 210053254 U CN210053254 U CN 210053254U
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Abstract
The utility model discloses a servo motor connecting structure for shortening length, which comprises a motor stator, an insulating end part, an end cover, a rear cover, a coder and a motor rotor; the motor stator is provided with a first spigot, the insulating end part is connected with the motor stator through a second spigot, and the insulating end part is fixed inside the motor stator through potting epoxy resin; one surface of the insulating end part is set as a flange surface, a through hole is arranged on the flange surface, the other surface of the insulating end part is set as a concave edge surface, and a first screw hole is arranged on the concave edge surface; the end cover penetrates through the through hole through a first screw to be fixedly connected with a motor stator; the flange surface and the connecting end surface are cambered surfaces protruding towards the motor stator, and the gap between the two cambered surfaces is 0.5 mm; a plurality of second screw holes are formed in the concave edge surface of the insulating end part, the encoder is installed in the concave edge surface of the insulating end part, and the end surface of the encoder retracts into the concave edge surface; the rear cover hole and the concave edge face of the insulating end part are fixedly connected to form a sealed cavity, and the encoder is wrapped in the sealed cavity.
Description
Technical Field
The utility model relates to a servo motor field, specifically speaking, in particular to servo motor.
Background
The servo motor is an execution layer of industrial control, is a core part of intelligent manufacturing, and has a plurality of difficulties which are not solved in the prior domestic servo motor. For example:
1) the appearance is long, and power density is low, influences the installation application at terminal smart machine and the performance of equipment, especially articulated robot's application.
2) The servo motor has higher requirements on the reliability of the rotor in some occasions of rapid acceleration and deceleration and repeated positive and negative rotation switching, the existing shaft and the rotor core are connected through simple interference, the creep deformation of materials can be caused by long-time high-strength work, and certain probability exists in the dislocation movement of the rotation direction of the rotor. If the key connecting shaft and the rotor core are adopted, the manufacturing cost of the rotor can be greatly increased, and meanwhile, some products are limited by the structural size and are not easy to adopt.
3) At present, in the process of manufacturing the magnetic steel, a magnetic steel blank is generally cut and cut by utilizing linear cutting, wherein in order to improve the production efficiency, burr sharp angles are arranged on the periphery of the cut magnetic steel, and then the magnetic steel is vibrated to remove burrs and chamfers. Because of the vibration mode, the randomness exists, and the fillet consistency of each piece of magnetic steel is not good. Therefore, when the magnetic steel is assembled and adhered, the bottom angle of the corresponding iron core clamping groove needs to be designed to be small enough to avoid the magnetic steel, so that the magnetic steel is adhered and fixed. However, this is a contradiction with the iron core stamping process, the die stamping fillet needs to be kept above 0.2, and the larger the fillet is, the more the sharp corner of the die is not easy to break, and the service life of the die is longer.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a servo motor to the not enough among the prior art to solve the problem that exists among the prior art.
The utility model provides a technical problem can adopt following technical scheme to realize:
a servo motor comprises a motor stator, an insulating end part, an end cover, a rear cover, an encoder and a motor rotor;
the opening end of the motor stator is provided with a first spigot and is connected with the insulating end part through the first spigot, the inner end surface of the insulating end part is set as a positioning end surface connected with the motor stator, a second spigot matched with the first spigot is arranged on the positioning end surface, the insulating end part is close to a PCB in the motor stator, and the insulating end part is fixed in the motor stator through potting epoxy resin;
the outer end face of the insulating end part is a connecting end face connected with the end cover, one face of the end cover is a flange face, a through hole is formed in the flange face, the other face of the end cover is a concave edge face, and a first screw hole is formed in the concave edge face; the end cover penetrates through the through hole through a first screw to be fixedly connected with a motor stator; the flange surface and the connecting end surface are cambered surfaces protruding towards the motor stator, and the gap between the two cambered surfaces is 0.5 mm;
a plurality of second screw holes are formed in the concave edge surface of the insulating end part, the encoder is arranged in the concave edge surface of the insulating end part through second screws matched with the second screw holes, and the end surface of the encoder retracts into the concave edge surface;
the rear cover is fixedly connected with the concave edge surface of the insulating end part through a third screw matched with the first screw hole, the rear cover and the concave edge surface of the insulating end part form a sealed cavity, and the encoder is wrapped in the sealed cavity;
the motor rotor comprises a rotor core, a shaft arranged inside the rotor core and a plurality of magnetic steels arranged on the outer circumferential surface of the rotor core;
the rotor iron core is provided with an axial through shaft hole, the shaft is arranged in the shaft hole through a hot sleeve method or a cold pressing method, and the inner surface of the shaft hole is in interference fit with the outer surface of the shaft; the inner surface of the shaft hole of the rotor core is provided with a plurality of stress notches, and the stress notches are used for preventing the rotor core and the shaft from moving in a dislocation way;
the outer circumferential surface of the rotor core is provided with a plurality of protrusions, and the adjacent protrusions form an avoidance groove for mounting magnetic steel on the outer circumferential surface of the rotor core; the two side edges of the avoiding groove are provided with magnetic steel clamping edges, the magnetic steel clamping edges are inclined inwards to form a magnetic steel limiting structure, the bottom edge of the avoiding groove is provided with a magnetic steel bonding edge, an adhesive is arranged on the magnetic steel bonding edge and used for fixing the magnetic steel, and two bottom corners formed by the two magnetic steel clamping edges and the magnetic steel bonding edge are round corners;
the magnetic steel is provided with a main body structure matched with the avoiding groove, the magnetic steel comprises a magnetic steel bottom edge and two magnetic steel side edges, the magnetic steel is arranged in the avoiding groove through matching of the two magnetic steel side edges with the magnetic steel limiting structure, and the magnetic steel is fixedly connected with a magnetic steel bonding edge through the magnetic steel bottom edge.
Further, protruding and dodge the axial extension of groove along rotor core, rotor core's one end is protruding and the starting point of dodging the groove, and rotor core's the other end is protruding and the terminal point of dodging the groove.
Furthermore, the width of the end surface of the stress notch is larger than that of the bottom surface of the stress notch.
Furthermore, the stress slot is uniformly distributed along the inner surface of the shaft hole, and each stress slot extends along the axial direction of the rotor core.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the servo motor has the advantages of simple structure, ingenious design, high-efficiency magnetic circuit of the motor, high groove filling rate design and application of the thin encoder, the length of the servo motor can be reduced, and the shortening rate is reduced by about 35%.
Iron core stamping die can design for suitable fillet assurance mould punching press life-span, and the rotor core also can be packed into to the magnet steel need not accurate control fillet size, and the manufacturability is better.
The magnetic steel is fixed on the iron core between the magnetic steel and the rotor iron core through the adhesive, the adhesive film thickness is kept through adhesive storage, and the adhesive strength is improved so as to improve the operation reliability of the rotor.
Through the slot that lacks of locating rotor core, utilize stress concentration and the deformation phenomenon that interference fit produced, form whole claw formula shape, prevent the dislocation of rotor core and axle and remove to improve the connection reliability, solve the problem that exists among the prior art.
Drawings
Fig. 1 is a schematic diagram of a connection structure of a servo motor according to the present invention.
Fig. 2 is a schematic view of the motor stator according to the present invention.
Fig. 3 is a schematic view of an insulating end according to the present invention.
Fig. 4 is a schematic view of the connection between the stator and the insulating end of the motor according to the present invention.
Fig. 5a is a schematic view of a flange face of an end closure according to the present invention.
Fig. 5b is a schematic view of the concave edge surface of the end cap according to the present invention.
Fig. 6 is a schematic view of the gap between the flange surface and the connecting end surface according to the present invention.
Fig. 7 is a sectional view of the connection structure of the rotor core and the shaft according to the present invention.
Fig. 8 is a schematic view of a connection structure of a rotor core and a shaft according to the present invention.
Fig. 9 is a stress diagram of finite element analysis according to the present invention.
Fig. 10 is a schematic view of the magnetic steel mounting structure of the present invention.
Fig. 11 is a schematic view of a rotor core according to the present invention.
Fig. 12 is a schematic view of the evasion groove of the present invention.
Fig. 13 is an installation schematic diagram of the magnetic steel installation structure of the present invention.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.
Referring to fig. 1-13, a servo motor of the present invention includes a motor stator (a), an insulating end portion (b), an end cover (c), a rear cover (d), an encoder (e), and a motor rotor (f);
the opening end of the motor stator (a) is provided with a first spigot (1) and is connected with an insulating end part (b) through the first spigot (1), the inner end face of the insulating end part (b) is provided with a positioning end face (4) connected with the motor stator (a), the positioning end face (4) is provided with a second spigot (3) matched with the first spigot (1), the insulating end part (b) is close to a PCB (2) in the motor stator (a), and the insulating end part (b) is fixed in the motor stator (a) through potting epoxy resin (5);
the outer end face of the insulating end part (b) is a connecting end face (10) connected with an end cover (c), one face of the end cover (c) is a flange face (6), a through hole (7) is formed in the flange face (6), the other face of the end cover (c) is a concave edge face (8), and a first screw hole (9) is formed in the concave edge face (8); the end cover (c) penetrates through the through hole (7) through a first screw (11) and is fixedly connected with the motor stator (a); the flange surface (6) and the connecting end surface (10) are both arc surfaces protruding towards the motor stator (a), and a gap (14) between the two arc surfaces is 0.5 mm;
a plurality of second screw holes (12) are formed in the concave edge surface (8) of the insulating end part (b), an encoder (e) is arranged in the concave edge surface (8) of the insulating end part (b) through second screws matched with the second screw holes (12), and the end surface of the encoder (e) retracts into the concave edge surface (8);
the rear cover (d) is fixedly connected with the concave edge surface (8) of the insulating end part (b) through a third screw (13) matched with the first screw hole (9), the rear cover (d) and the concave edge surface (8) of the insulating end part (b) form a sealed cavity, and the encoder (e) is wrapped in the sealed cavity;
the motor rotor (f) comprises a rotor core (15), a shaft (16) arranged inside the rotor core (15), and a plurality of magnetic steels (17) arranged on the outer circumferential surface of the rotor core (a);
the rotor core (15) is provided with a shaft hole (18) which penetrates through the shaft in the axial direction, the shaft (16) is installed in the shaft hole (18) through a hot sleeve method or a cold pressing method, and the inner surface (19) of the shaft hole (18) is in interference fit with the outer surface of the shaft (16); a plurality of stress notches (20) are formed in the inner surface (19) of the shaft hole (18) of the rotor iron core (15), and the stress notches (20) are used for preventing the rotor iron core (15) and the shaft (16) from moving in a dislocation mode;
a plurality of protrusions (21) are arranged on the outer circumferential surface of the rotor core (15), and an avoidance groove (22) for mounting the magnetic steel (17) is formed on the outer circumferential surface of the rotor core (15) by the adjacent protrusions (21); two side edges of the avoiding groove (22) are provided with magnetic steel clamping edges (23), the magnetic steel clamping edges (23) are inclined inwards to form a magnetic steel limiting structure, the bottom edge of the avoiding groove (22) is provided with a magnetic steel bonding edge (24), an adhesive is arranged on the magnetic steel bonding edge (24) and used for fixing the magnetic steel (17), and two bottom corners (25) formed by the two magnetic steel clamping edges (23) and the magnetic steel bonding edge (24) are round corners;
magnet steel (17) have with dodge groove (22) complex major structure, magnet steel (17) include magnet steel base (27) and two magnet steel sides (26), and magnet steel (17) are packed into through two magnet steel sides (26) cooperation magnet steel limit structure and are dodged in groove (22), and magnet steel (17) pass through magnet steel base (27) and magnet steel bonding limit (24) fixed connection.
Protruding (21) and dodge groove (22) along rotor core's (15) axial extension, the one end of rotor core (15) is protruding (21) and dodges the starting point in groove (22), and the other end of rotor core (15) is protruding (21) and dodges the terminal point in groove (22).
The end face width of the stress notch (20) is larger than the bottom face width of the stress notch (20).
The stress notches (20) are uniformly distributed along the inner surface of the shaft hole (18), and each stress notch (20) extends along the axial direction of the rotor core (15).
The utility model discloses an installation as follows:
the motor stator (a) comprises the following general characteristics, and also comprises a connecting spigot (1) and a PCB (2), wherein the motor stator (a) comprises the conventional functions of a winding, a stator core, a connector fixing screw, an end cover fixing screw hole and the like; the insulation end part (b) is provided with a fixed second spigot (3) and a positioning end face (4), the insulation end part (b) is fixed in the motor stator (a) through the close fit of the second spigot (3) and the first spigot (1) of the motor stator (a), the positioning end face (4) of the insulation end part (b) is close to the PCB (2) of the flat stator, and epoxy resin (5) is filled in the motor stator (a) to fix the end part insulation (b).
The end cover (c) comprises a flange surface (6), through holes (7), a concave edge surface (8) and first screw holes (9), the end cover (c) penetrates through the 4 through holes (7) of the end cover (c) through first screws (11) to be fixedly connected with the motor stator (a), the flange surface (6) and the connecting end surface (10) are both arc surfaces protruding towards the motor stator (a), and a gap (14) between the two arc surfaces is 0.5mm, so that the length of the motor is effectively reduced.
Encoder (e) are through second screw (12) of 2 mounting screws in flange face (8) of end cover (c), through the shape laminating of flange face (8) and encoder, the encoder is retracted in flange face (8) of end cover (c), effectively reduces the length of motor. The rear cover (d) is fixedly connected with the concave edge surface (8) of the insulating end part (b) through a third screw (13) matched with the first screw hole (9), the rear cover (d) and the concave edge surface (8) of the insulating end part (b) form a sealing cavity, and the encoder (e) is wrapped in the sealing cavity.
The utility model discloses a rotor core and the connection structure of axle, through finite element analysis, set up stress on rotor core's shaft hole and lacked the groove after, the axle is pressed into rotor core after, receives interference fit's stress influence, and rotor core produces stress deformation, forms claw formula structure to prevent the dislocation of rotor core and axle and remove, thereby improve and connect the reliability.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. A servo motor comprises a motor stator (a), an insulating end part (b), an end cover (c), a rear cover (d), an encoder (e) and a motor rotor (f); the method is characterized in that:
the opening end of the motor stator (a) is provided with a first spigot (1) and is connected with an insulating end part (b) through the first spigot (1), the inner end face of the insulating end part (b) is provided with a positioning end face (4) connected with the motor stator (a), the positioning end face (4) is provided with a second spigot (3) matched with the first spigot (1), the insulating end part (b) is close to a PCB (2) in the motor stator (a), and the insulating end part (b) is fixed in the motor stator (a) through potting epoxy resin (5);
the outer end face of the insulating end part (b) is a connecting end face (10) connected with an end cover (c), one face of the end cover (c) is a flange face (6), a through hole (7) is formed in the flange face (6), the other face of the end cover (c) is a concave edge face (8), and a first screw hole (9) is formed in the concave edge face (8); the end cover (c) penetrates through the through hole (7) through a first screw (11) and is fixedly connected with the motor stator (a); the flange surface (6) and the connecting end surface (10) are both arc surfaces protruding towards the motor stator (a), and a gap (14) between the two arc surfaces is 0.5 mm;
a plurality of second screw holes (12) are formed in the concave edge surface (8) of the insulating end part (b), an encoder (e) is arranged in the concave edge surface (8) of the insulating end part (b) through second screws matched with the second screw holes (12), and the end surface of the encoder (e) retracts into the concave edge surface (8);
the rear cover (d) is fixedly connected with the concave edge surface (8) of the insulating end part (b) through a third screw (13) matched with the first screw hole (9), the rear cover (d) and the concave edge surface (8) of the insulating end part (b) form a sealed cavity, and the encoder (e) is wrapped in the sealed cavity;
the motor rotor (f) comprises a rotor core (15), a shaft (16) arranged inside the rotor core (15), and a plurality of magnetic steels (17) arranged on the outer circumferential surface of the rotor core (15);
the rotor core (15) is provided with a shaft hole (18) which penetrates through the shaft in the axial direction, the shaft (16) is installed in the shaft hole (18) through a hot sleeve method or a cold pressing method, and the inner surface (19) of the shaft hole (18) is in interference fit with the outer surface of the shaft (16); a plurality of stress notches (20) are formed in the inner surface (19) of the shaft hole (18) of the rotor iron core (15), and the stress notches (20) are used for preventing the rotor iron core (15) and the shaft (16) from moving in a dislocation mode;
a plurality of protrusions (21) are arranged on the outer circumferential surface of the rotor core (15), and an avoidance groove (22) for mounting the magnetic steel (17) is formed on the outer circumferential surface of the rotor core (15) by the adjacent protrusions (21); two side edges of the avoiding groove (22) are provided with magnetic steel clamping edges (23), the magnetic steel clamping edges (23) are inclined inwards to form a magnetic steel limiting structure, the bottom edge of the avoiding groove (22) is provided with a magnetic steel bonding edge (24), an adhesive is arranged on the magnetic steel bonding edge (24) and used for fixing the magnetic steel (17), and two bottom corners (25) formed by the two magnetic steel clamping edges (23) and the magnetic steel bonding edge (24) are round corners;
magnet steel (17) have with dodge groove (22) complex major structure, magnet steel (17) include magnet steel base (27) and two magnet steel sides (26), and magnet steel (17) are packed into through two magnet steel sides (26) cooperation magnet steel limit structure and are dodged in groove (22), and magnet steel (17) pass through magnet steel base (27) and magnet steel bonding limit (24) fixed connection.
2. The servo motor of claim 1, wherein: protruding (21) and dodge groove (22) along rotor core's (15) axial extension, the one end of rotor core (15) is protruding (21) and dodges the starting point in groove (22), and the other end of rotor core (15) is protruding (21) and dodges the terminal point in groove (22).
3. The servo motor of claim 1, wherein: the end face width of the stress notch (20) is larger than the bottom face width of the stress notch (20).
4. The servo motor of claim 1, wherein: the stress notches (20) are uniformly distributed along the inner surface of the shaft hole (18), and each stress notch (20) extends along the axial direction of the rotor core (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920180492.5U CN210053254U (en) | 2019-02-01 | 2019-02-01 | Servo motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920180492.5U CN210053254U (en) | 2019-02-01 | 2019-02-01 | Servo motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210053254U true CN210053254U (en) | 2020-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920180492.5U Active CN210053254U (en) | 2019-02-01 | 2019-02-01 | Servo motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210053254U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109888938A (en) * | 2019-02-01 | 2019-06-14 | 东菱技术有限公司 | A kind of servo motor |
| CN117294052A (en) * | 2023-11-27 | 2023-12-26 | 坎德拉(深圳)新能源科技有限公司 | Flywheel energy storage motor and flywheel energy storage device |
-
2019
- 2019-02-01 CN CN201920180492.5U patent/CN210053254U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109888938A (en) * | 2019-02-01 | 2019-06-14 | 东菱技术有限公司 | A kind of servo motor |
| CN117294052A (en) * | 2023-11-27 | 2023-12-26 | 坎德拉(深圳)新能源科技有限公司 | Flywheel energy storage motor and flywheel energy storage device |
| CN117294052B (en) * | 2023-11-27 | 2024-03-19 | 坎德拉(深圳)新能源科技有限公司 | Flywheel energy storage motor and flywheel energy storage device |
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