CN210807038U

CN210807038U - Brushless inner rotor motor with Hall

Info

Publication number: CN210807038U
Application number: CN201922019602.2U
Authority: CN
Inventors: 李雪原
Original assignee: Black and Decker Inc
Current assignee: Zhangjiagang Huajie Electronics Co Ltd; Black and Decker Inc
Priority date: 2019-11-21
Filing date: 2019-11-21
Publication date: 2020-06-19
Anticipated expiration: 2029-11-21

Abstract

The utility model relates to a brushless inner rotor motor that has Hall, including stator module, rotor subassembly and protecgulum and hou gai, fixedly connected with Hall plate on the bottom surface in the back lid, epaxial still cup joint with Hall plate cooperation work's multipolar magnetic ring, this multipolar magnetic ring's magnetic pole is just right one by one with the magnetic pole of rotor subassembly, multipolar magnetic ring is located between Hall plate and the rotor core, and is relative with Hall plate. The utility model discloses a multipolar magnetic ring unanimous with rotor subassembly magnetic pole is installed to epaxial one for the Hall plate can be covered after by fixed connection, because the inside great space that has originally of back lid, consequently can set up the support that is used for fixed Hall plate, and through the screw with Hall plate fixed connection on the support, thereby make Hall plate mounting structure firm, be convenient for install, long-term stable, lay the basis for brushless automated production that has Hall inner rotor motor.

Description

Brushless inner rotor motor with Hall

The technical field is as follows:

the utility model relates to a brushless has Hall inner rotor motor.

Background art:

brushless (Hall element) inner rotor motor adopts Hall plate detection rotor position, rethread controller changes motor input current polarometer according to the rotor position information of Hall plate feedback, thereby make the motor continuously rotate, traditional brushless Hall plate fixed mounting that has Hall inner rotor motor is on stator module, because be provided with the coil on the stator module, there is not the space to use the screw connection Hall plate, consequently, all adopt the fixed mode of line winding to tie up the Hall plate on stator module's lower end plate, this kind of connected mode is complicated, need manual operation, and fixed position deviation appears easily and leads to Hall plate testing result inaccuracy, and long-term after-service Hall plate becomes flexible easily and leads to detecting function inefficacy.

The utility model has the following contents:

the utility model discloses the technical problem that will solve is: the brushless inner rotor motor with the Hall plate is firm in Hall plate mounting structure, convenient to mount and stable for a long time.

In order to solve the technical problem, the utility model discloses a technical scheme is: a brushless Hall inner rotor motor comprises a stator assembly, a rotor assembly, a front cover and a rear cover, wherein the stator assembly comprises a stator core, an upper end plate and a lower end plate which are connected to two ends of the stator core, winding frames are respectively arranged on the upper end plate and the lower end plate, an enameled wire coil is wound on the winding frames, and the head end and the tail end of the coil are led out to form a motor wiring terminal; the rotor assembly comprises a shaft, a rotor core fixedly sleeved on the shaft, a plurality of magnetic shoes attached to the outer wall of the rotor core and a magnetic sleeve sleeved outside the magnetic shoes, wherein two ends of the shaft are respectively and rotatably connected to a front cover and a rear cover through bearings, and the front cover and the rear cover are respectively buckled at two ends of a stator core; the rear cover is characterized in that a Hall plate is fixedly connected to the inner bottom surface of the rear cover, a multi-pole magnetic ring which is matched with the Hall plate to work is further sleeved on the shaft, magnetic poles of the multi-pole magnetic ring are opposite to magnetic poles of the rotor assembly one by one, and the multi-pole magnetic ring is located between the Hall plate and the rotor core and opposite to the Hall plate.

As a preferred scheme, a plurality of supports for fixing the Hall plates are arranged on the inner bottom surface of the rear cover, connecting holes are formed in the supports, through holes in one-to-one correspondence with the connecting holes are formed in the Hall plates, the Hall plates are fixedly connected with the rear cover through screws penetrating through the through holes and connected in the connecting holes in a threaded mode, and wire passing holes are formed in the side wall of the rear cover.

As a preferred scheme, the multi-pole magnetic ring is fixedly connected to the shaft through a magnetic ring sheath, the magnetic ring sheath is sleeved on the shaft and is in interference fit with the shaft, one side of the magnetic ring sheath, facing the hall plate, is provided with an annular clamping groove, and the multi-stage magnetic ring is clamped in the annular clamping groove and is bonded in the annular clamping groove through a bonding agent.

As a preferred scheme, a lead wire groove is formed in the outer wall of the stator core and corresponds to the wire passing hole, the head end and the tail end of the coil extend to the wire passing hole through the lead wire groove and extend out of the rear cover, and the signal wire on the Hall plate also extends to the wire passing hole through the lead wire groove and extends out of the rear cover.

The utility model has the advantages that: the utility model discloses a multipolar magnetic ring unanimous with rotor subassembly magnetic pole is installed to epaxial one for the Hall plate can be covered after by fixed connection, because the inside great space that has originally of back lid, consequently can set up the support that is used for fixed Hall plate, and through the screw with Hall plate fixed connection on the support, thereby make Hall plate mounting structure firm, be convenient for install, long-term stable, lay the basis for brushless automated production that has Hall inner rotor motor.

The utility model discloses further utilize the multipolar magnetic ring of magnetic ring sheath fixed connection, can effectively fix a position multipolar magnetic ring to the position that keeps the multipolar magnetic ring in the long-term use of motor does not take place cheaply, forms the protection to multipolar magnetic ring simultaneously, ensures the stable function of multipolar magnetic ring.

The utility model discloses further through set up the lead wire groove at the stator core outer wall and come the signal line of the head and the tail both ends and the hall board of leading coil, make the succinct compactness of motor structure, reduce manufacturing cost.

Description of the drawings:

the following detailed description of embodiments of the present invention is provided with reference to the accompanying drawings, in which:

fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is an exploded view of the present invention;

fig. 3 is a schematic structural view of the rear cover of the present invention;

fig. 4 is a schematic view of the connection structure of the rear cover and the hall plate according to the present invention;

fig. 5 is a schematic structural view of the magnetic ring sheath of the present invention.

In fig. 1 to 5: 1. the magnetic bearing comprises a rear cover, 2, a bearing, 3, a Hall plate, 4, a multi-pole magnetic ring, 5, a magnetic ring sheath, 6, a lead groove, 7, a lower end plate, 8, a stator core, 9, an upper end plate, 10, a magnetic tile, 11, a screw, 12, a rotor core, 13, a magnetic sleeve, 14, a shaft, 15, a support, 16, a front cover, 17, a winding frame, 18, a coil, 19, a wiring terminal, 20, a connecting hole, 21, a through hole, 22, a screw, 23, a wire passing hole, 24, an annular clamping groove, 25 and a positioning column.

The specific implementation mode is as follows:

the following describes in detail a specific embodiment of the present invention with reference to the drawings.

The brushless Hall inner rotor motor shown in fig. 1 to 5 comprises a stator assembly, a rotor assembly, a front cover 16 and a rear cover 1, wherein the stator assembly comprises a stator core 8, an upper end plate 9 and a lower end plate 7 connected to two ends of the stator core 8, the upper end plate 9 and the lower end plate 7 are respectively provided with a winding frame 17, an enameled wire coil 18 is wound on the winding frame 17, and the head end and the tail end of the coil 18 are led out to form a motor terminal 19; the rotor assembly comprises a shaft 14, a rotor core 12 fixedly sleeved on the shaft 14, a plurality of magnetic shoes 10 attached to the outer wall of the rotor core 12 and magnetic sleeves 13 sleeved outside the magnetic shoes 10, wherein two ends of the shaft 14 are respectively rotatably connected to a front cover 16 and a rear cover 1 through bearings 2, and the front cover 16 and the rear cover 1 are respectively buckled at two ends of a stator core 8; the inner bottom surface of the rear cover 1 is fixedly connected with a Hall plate 3, the Hall plate 3 is a PCB board provided with Hall elements, the shaft 14 is further sleeved with a multi-pole magnetic ring 4 which is matched with the Hall plate 3 to work, the magnetic poles of the multi-pole magnetic ring 4 are opposite to the magnetic poles of the rotor assembly one by one, and the multi-pole magnetic ring 4 is positioned between the Hall plate 3 and the rotor core 12 and is opposite to the Hall plate 3.

In this embodiment, the stator core 8, the upper end plate 9, and the lower end plate 7 are connected to each other by screws 11, as shown in fig. 1, the screws 11 pass through holes on the stator core and grooves on the outer edges of the upper end plate 9 and the lower end plate 7, and the upper end plate 9 and the lower end plate 7 are clamped at both ends of the stator core 8 by nuts of the screws, so that, as the coils 18 are wound on the lower end plate 7 and the upper end plate 9, there is no space for fixing the hall plate 3 by using bolts.

As shown in fig. 3, two supports 15 for fixing the hall plate 3 are disposed on the inner bottom surface of the rear cover 1, connection holes 20 are disposed on the supports 15, through holes 21 corresponding to the connection holes 20 one to one are disposed on the hall plate 3, the hall plate 3 is fixedly connected to the rear cover 1 by screws 22 threaded into the connection holes 20 through the through holes 21, and wire passing holes 23 are disposed on the side wall of the rear cover 1.

In this embodiment, each support 15 is provided with a connecting hole 20, and each support 15 is further provided with a positioning column 25, so that when the hall plate 3 is mounted, the positioning column 25 and the positioning hole formed in the hall plate 3 are matched with each other to realize accurate positioning of the hall plate 3, thereby improving the mounting accuracy of the hall plate 3.

In this embodiment, the multi-pole magnetic ring 4 is fixedly connected to the shaft 14 through a magnetic ring sheath 5, the magnetic ring sheath 5 is sleeved on the shaft 14 and is in interference fit with the shaft 14, as shown in fig. 5, a ring slot 24 is arranged on one side of the magnetic ring sheath 5 facing the hall plate 3, and the multi-pole magnetic ring 4 is clamped in the ring slot 24 and is bonded in the ring slot 24 through an adhesive.

As shown in fig. 1, a lead slot 6 is formed in the outer wall of the stator core 8, the lead slot 6 corresponds to the wire passing hole 23, the head and tail ends of the coil 18 extend to the wire passing hole 23 through the lead slot 6 and extend out of the rear cover 1, and the signal line on the hall plate 3 also extends to the wire passing hole 23 through the lead slot 6 and extends out of the rear cover 1.

The utility model discloses the theory of operation is: as shown in fig. 1-5, the utility model discloses an install a multipolar magnetic ring 4 unanimous with the rotor subassembly magnetic pole on axle 14 for Hall plate 3 can be by fixed connection on lid 1 behind, because lid 1 inside has great space originally after, consequently can set up the support 15 that is used for fixed Hall plate 3, and through screw 22 with Hall plate 3 fixed connection on support 15, thereby make Hall plate 3 mounting structure firm, be convenient for install, long-term stable, the automated production who has Hall inner rotor motor for the brushless has lays the basis.

Traditional brushless have Hall inner rotor motor to respond to the Hall plate in order to sense the magnetic pole change of rotor subassembly, must install on stator module, if too far away from the rotor subassembly then can not respond to the magnetic pole change of rotor subassembly, just also lost the function that Hall piece control current polarly, lead to the unable normal rotation of motor. The utility model discloses an above-mentioned technical means has effectively solved this technical problem and has made hall plate 3 can install on the back lid 1 far away from the rotor subassembly to reduce hall plate 3's the installation degree of difficulty, improve hall plate 3 and install the stability of fastness and later stage work.

The above embodiments are merely illustrative of the principles and effects of the present invention, and some embodiments in use, and are not intended to limit the invention; it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications belong to the protection scope of the present invention.

Claims

1. A brushless inner rotor motor with Hall comprises a stator assembly, a rotor assembly, a front cover (16) and a rear cover (1), wherein the stator assembly comprises a stator core (8), an upper end plate (9) and a lower end plate (7) which are connected to two ends of the stator core (8), winding frames (17) are respectively arranged on the upper end plate (9) and the lower end plate (7), enameled wire coils (18) are wound on the winding frames (17), and the head end and the tail end of each coil (18) are led out to form a motor wiring terminal (19); the rotor assembly comprises a shaft (14), a rotor core (12) fixedly sleeved on the shaft (14), a plurality of magnetic shoes (10) attached to the outer wall of the rotor core (12) and magnetic sleeves (13) sleeved outside the magnetic shoes (10), two ends of the shaft (14) are rotatably connected to a front cover (16) and a rear cover (1) through bearings (2), and the front cover (16) and the rear cover (1) are respectively buckled at two ends of a stator core (8); the magnetic field Hall type brushless DC motor is characterized in that a Hall plate (3) is fixedly connected to the inner bottom surface of the rear cover (1), a multi-pole magnetic ring (4) matched with the Hall plate (3) in work is further sleeved on the shaft (14), the magnetic poles of the multi-pole magnetic ring (4) are opposite to the magnetic poles of the rotor assembly one by one, and the multi-pole magnetic ring (4) is located between the Hall plate (3) and the rotor core (12) and opposite to the Hall plate (3).

2. A brushless inner rotor motor with Hall according to claim 1, wherein the inner bottom surface of the rear cover (1) is provided with a plurality of supports (15) for fixing the Hall plate (3), the supports (15) are provided with connecting holes (20), the Hall plate (3) is provided with through holes (21) corresponding to the connecting holes (20) one by one, the Hall plate (3) is fixedly connected with the rear cover (1) by screws (22) penetrating through the through holes (21) and screwed into the connecting holes (20), and the side wall of the rear cover (1) is provided with wire passing holes (23).

3. A brushless inner rotor motor according to claim 1, wherein the multi-pole magnetic ring (4) is fixedly connected to the shaft (14) through a magnetic ring sheath (5), the magnetic ring sheath (5) is sleeved on the shaft (14) and is in interference fit with the shaft (14), a side of the magnetic ring sheath (5) facing the Hall plate (3) is provided with an annular groove (24), and the multi-pole magnetic ring (4) is clamped in the annular groove (24) and is bonded in the annular groove (24) through an adhesive.

4. A brushless Hall inner rotor motor according to claim 1, wherein the outer wall of the stator core (8) is provided with a lead slot (6), the lead slot (6) corresponds to the wire passing hole (23), the head and tail ends of the coil (18) extend to the wire passing hole (23) through the lead slot (6) and extend out of the rear cover (1), and the signal line on the Hall plate (3) also extends to the wire passing hole (23) through the lead slot (6) and extends out of the rear cover (1).