CN213817503U

CN213817503U - External permanent magnet synchronous motor encoder structure

Info

Publication number: CN213817503U
Application number: CN202023078200.9U
Authority: CN
Inventors: 叶开贵
Original assignee: Fujian Mingdong New Energy Power Technology Co ltd
Current assignee: Fujian Mingdong New Energy Power Technology Co ltd
Priority date: 2020-12-20
Filing date: 2020-12-20
Publication date: 2021-07-27
Anticipated expiration: 2030-12-20

Abstract

The utility model relates to an external PMSM encoder structure, including motor body, motor body is equipped with the motor shaft, the right-hand member is equipped with the bulge loop, the motor shaft is established in the bulge loop, the motor shaft right-hand member is equipped with encoder magnetic particle, a plurality of first louvres have been seted up on the bulge loop, the right-hand member is equipped with the encoder circuit board, two spacing holes have been seted up to the bulge loop right-hand member, the annular spacing groove has been seted up correspondingly on the encoder circuit board, spacing hole and annular spacing groove all set up along motor shaft centre of a circle symmetry, motor body right-hand member cup joints and is equipped with the safety cover, correspond between safety cover and the motor body and have seted up the self-locking hole, be equipped with the auto-locking pressing member in the auto-locking hole, including pressing head, connecting block and dop, pressing head, connecting block and dop connect gradually, set up a plurality of second louvres on the safety cover right-hand member wall; the first heat dissipation hole and the second heat dissipation hole are designed to facilitate heat emission; the design of the annular limiting groove can adjust the magnetic pole angle; the design of the self-locking pressing piece can enhance the protection capability.

Description

External permanent magnet synchronous motor encoder structure

Technical Field

The utility model relates to an encoder technical field specifically is an external PMSM encoder structure.

Background

Install the PMSM who takes encoder among the new energy automobile, PMSM provides the excitation with the permanent magnet, it is comparatively simple to make motor structure, processing and assembly cost have been reduced, the PMSM who takes magnetic induction encoder at present, mainly rely on the instruction signal that the converter that is accepted by magnetic induction encoder gave, make the action of starting rotation, the encoder is motor drive's core component, the heat that current encoder produced when using is difficult for scattering outward, because the restriction of technology, the magnetic induction element of encoder and the absolute position of motor magnetic particle have certain difference, the magnetic pole angle of motor is different, it is inconvenient to use, in addition, the encoder required precision is high, need the professional to debug, and current encoder visor is opened the dismantlement easily, non-professional operation easily leads to the encoder to lose the precision.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model provides an external PMSM encoder structure.

In order to achieve the above object, the utility model provides a following technical scheme: an external permanent magnet synchronous motor encoder structure comprises a motor body, wherein a motor shaft penetrates through the left end and the right end of the motor body, a convex ring is arranged at the center position of the right end of the motor body, the motor shaft is arranged in the convex ring, encoder magnetic particles are arranged at the right end of the motor shaft, a plurality of first heat dissipation holes are formed in the side wall of the convex ring, an encoder circuit board is correspondingly arranged at the right end of the convex ring, two limiting holes are formed in the right end of the convex ring, two annular limiting grooves are formed in the encoder circuit board correspondingly to the two limiting holes, the circle centers of the two annular limiting grooves coincide with the circle center of the encoder circuit board, the two limiting holes and the annular limiting grooves are symmetrically arranged along the circle center of the motor shaft, the convex ring is connected with the encoder circuit board through bolts, a protective cover is sleeved on the motor body, the safety cover inner wall cooperation is installed motor body lateral wall outer end, correspond between safety cover and the motor body and seted up from the lockhole, be provided with the auto-lock in the lockhole and compress tightly the piece, the auto-lock compresses tightly the piece and includes clamping head, connecting block and dop, clamping head, connecting block and dop connect gradually the setting, a plurality of second louvres have been seted up on the safety cover right-hand member wall.

In a further preferred embodiment, the protective cap is provided with a viewing window at its top end.

In a further preferred mode, rubber rings are arranged on the periphery of the observation window.

In a further preferred embodiment, the encoder circuit board is provided with a first magnetism isolating layer on an outer end wall thereof.

In a further preferred embodiment, a second magnetic shielding layer is arranged on the inner wall of the protective cover.

Preferably, an adjusting hole is formed in the center of the inner end of the chuck.

In a further preferred mode, a waterproof breathable film is arranged in the second heat dissipation hole.

Compared with the prior art, the utility model provides a, possess following beneficial effect:

in the utility model, the first heat dissipation holes realize heat dissipation to the inner space formed by the convex ring and the encoder circuit board, and the second heat dissipation holes realize discharge of heat dissipated outside the first heat dissipation holes, so that the heat accumulation generated by the rotation of the motor shaft is avoided, the normal operation of the encoder is influenced by the rise of temperature, and the normal operation of the motor body is ensured; the design of the annular limiting groove, the annular limiting groove and the limiting hole are connected in a matched mode, so that the convex ring is connected with the encoder circuit board, the encoder circuit board is convenient to adjust while the normal operation and use of the encoder are guaranteed, the absolute positions of the encoder circuit board and the motor magnetic particles are changed, and further the magnetic pole angle of the motor is changed; the design of auto-lock pressing member, auto-lock pressing member cooperation are from the lockhole, realize the connection locking between safety cover and the motor body, avoid non-professional to open the safety cover easily, and the protective capacities of reinforcing safety cover avoids non-professional to operate easily and leads to the encoder to lose the precision.

Drawings

FIG. 1 is a schematic sectional view of the overall structure of the present invention;

FIG. 2 is a solid diagram of the circuit board structure of the middle encoder of the present invention;

fig. 3 is an enlarged view of a portion of a structure in fig. 1.

In the figure: 1. a motor body; 2. a motor shaft; 3. a convex ring; 4. encoder magnetic particles; 5. a first heat dissipation hole; 6. a circuit board of the encoder; 7. a limiting hole; 8. an annular limiting groove; 9. a protective cover; 10. self-locking holes; 11. a self-locking pressing piece; 12. a compression head; 13. connecting blocks; 14. clamping a head; 15. a second heat dissipation hole; 16. an observation window; 17. a rubber ring; 18. a first magnetism isolating layer; 19. a second magnetism isolating layer; 20. an adjustment hole; 21. waterproof ventilated membrane.

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.

Example (b):

referring to fig. 1-3, an external permanent magnet synchronous motor encoder structure includes a motor body 1, a motor shaft 2 is disposed at the left and right ends of the motor body 1, a protruding ring 3 is disposed at the center of the right end of the motor body 1, the motor shaft 2 is disposed in the protruding ring 3, an encoder magnetic particle 4 is disposed at the right end of the motor shaft 2, a plurality of first heat dissipation holes 5 are disposed on the sidewall of the protruding ring 3, an encoder circuit board 6 is correspondingly disposed at the right end of the protruding ring 3, two limiting holes 7 are disposed at the right end of the protruding ring 3, two annular limiting grooves 8 are disposed on the encoder circuit board 6 corresponding to the two limiting holes 7, the circle centers of the two annular limiting grooves 8 coincide with the circle center of the encoder circuit board 6, and the two limiting holes 7 and the annular limiting grooves 8 are symmetrically disposed along the circle center of the motor shaft 2, protruding ring 3 and encoder circuit board 6 pass through bolted connection, 1 right-hand member of motor body cup joints and is provided with

safety cover

9, 9 inner wall cooperations of safety cover are installed 1 lateral wall outer end of motor body, correspond between safety cover 9 and the motor body 1 and seted up from lockhole 10, be provided with auto-lock pressing member 11 in the lockhole 10, auto-lock pressing member 11 includes clamp head 12, connecting block 13 and dop 14, clamp head 12, connecting block 13 and dop 14 connect gradually the setting, a plurality of second louvres 15 have been seted up on the wall of 9 right-hand members of safety cover.

In this embodiment, the top end of the protection cover 9 is provided with an observation window 16, stainless steel glass is preferably used as the observation window 16, so that the internal structure of the protection cover 9 can be observed in real time conveniently, and the normal operation of the internal structure can be determined.

In this embodiment, the observation window 16 is provided with rubber circle 17 all around, and rubber circle 17 realizes sealed all around to observation window 16, guarantees that the device is inside not to be influenced, guarantees the normal operating of internal plant.

In this embodiment, the first magnetism isolating layer 18 is disposed on the outer end wall of the encoder circuit board 6, and the first magnetism isolating layer 18 is preferably made of high-strength aluminum alloy, so as to achieve a magnetism isolating effect on the right end of the encoder circuit board 6 and avoid interference and extrusion of an external magnetic field.

In this embodiment, the inner wall of the protection cover 9 is provided with a second magnetism isolating layer 19, and the second magnetism isolating layer 19 is preferably made of high-strength aluminum alloy, so as to realize magnetism isolating effect on the protection cover 9 and avoid interference and extrusion of an external magnetic field.

In this embodiment, an adjusting hole 20 is formed in a central position of an inner side end of the chuck 14, the chuck 14 is preferably made of rubber, so that the chuck 14 is ensured to have elasticity, and when the self-locking pressing member 11 is inserted, the chuck 14 is pressed by using the adjusting hole 20, so that the self-locking pressing member 11 can conveniently enter the self-locking hole 10.

In this embodiment, be provided with waterproof ventilated membrane 21 in the second louvre 15, second louvre 15 is sparse to the inside heat of safety cover 9, utilizes waterproof ventilated membrane 21 to avoid external humid air to get into simultaneously, guarantees inside dry environment, guarantees motor body 1 normal operating.

The working principle is as follows: when the motor is used, the encoder circuit board 6 is correspondingly installed at the right end of the convex ring 3, the encoder circuit board 6 is rotated to a proper motor magnetic pole angle, the bolt penetrates through the annular limiting groove 8 and the limiting hole 7 to be screwed, the protective cover 9 is sleeved at the outer end of the motor body 1 after fixing is completed and is aligned with the self-locking hole 10, the self-locking pressing piece 11 is inserted into the self-locking hole 10, the chuck 14 is extruded to the adjusting hole 20 under the pressure action of the self-locking hole 10 and enters the motor body 1, the chuck 14 is matched with the inner wall of the motor body 1 to realize limiting, the installation is completed, the protective cover 9 is ensured not to be easily detached, the phenomenon that the encoder circuit board 6 loses precision due to the fact that a non-professional person carries out operation after detaching the protective cover is avoided, an external power supply is started during use, an instruction signal given by an, the motor shaft 2 rotates to generate heat, the generated heat is discharged out of the convex ring 3 through the first heat dissipation holes 5, and the discharged heat is discharged out through the second heat dissipation holes 15 of the protection cover 9.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that 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. An external permanent magnet synchronous motor encoder structure comprises a motor body (1), wherein a motor shaft (2) penetrates through the left end and the right end of the motor body (1), the external permanent magnet synchronous motor encoder structure is characterized in that a convex ring (3) is arranged at the center of the right end of the motor body (1), the motor shaft (2) is arranged in the convex ring (3), encoder magnetic particles (4) are arranged at the right end of the motor shaft (2), a plurality of first heat dissipation holes (5) are formed in the side wall of the convex ring (3), an encoder circuit board (6) is correspondingly arranged at the right end of the convex ring (3), two limiting holes (7) are formed in the right end of the convex ring (3), two annular limiting grooves (8) are formed in the encoder circuit board (6) correspondingly to the two limiting holes (7), and the circle centers of the two annular limiting grooves (8) coincide with the circle center of the encoder circuit board (6), two spacing hole (7) and annular spacing groove (8) are all followed motor shaft (2) centre of a circle symmetry sets up, bulge loop (3) and encoder circuit board (6) are through bolted connection, motor body (1) right-hand member cup joints and is provided with safety cover (9), safety cover (9) inner wall cooperation is installed motor body (1) lateral wall outer end, correspond between safety cover (9) and motor body (1) and seted up from lockhole (10), be provided with auto-lock compressing tightly (11) in auto-lock hole (10), auto-lock compressing tightly (11) are including compressing head (12), connecting block (13) and dop (14), compressing head (12), connecting block (13) and dop (14) connect gradually the setting, a plurality of second louvres (15) have been seted up on safety cover (9) right-hand member wall.

2. The external PMSM encoder structure of claim 1, wherein: and an observation window (16) is arranged at the top end of the protective cover (9).

3. The external PMSM encoder structure of claim 2, wherein: rubber rings (17) are arranged around the observation window (16).

4. The external PMSM encoder structure of claim 1, wherein: and a first magnetism isolating layer (18) is arranged on the outer end wall of the encoder circuit board (6).

5. The external PMSM encoder structure of claim 1, wherein: and a second magnetism isolating layer (19) is arranged on the inner wall of the protective cover (9).

6. The external PMSM encoder structure of claim 1, wherein: and an adjusting hole (20) is formed in the center of the inner side end of the clamping head (14).

7. The external PMSM encoder structure of claim 1, wherein: and a waterproof breathable film (21) is arranged in the second heat dissipation hole (15).