CN213027739U - Connection structure of automatically controlled board - Google Patents

Abstract

The utility model discloses a connecting structure of an electric control board, which is applied to a DC brushless motor with a stator assembly, wherein the DC brushless motor is provided with the electric control board; the connection structure of the electric control board comprises: a plurality of plug-in components fixedly arranged at the rear part of the stator assembly; and a plurality of connectors correspondingly inserted on the insertion assembly; the connecting piece includes: connecting the substrates; a first plug board formed in the middle of the front end of the connection substrate; a second plug board formed in the middle of the front end of the connection substrate; and two third plugboards respectively arranged at two sides of the first plugboard; wherein, a plurality of jacks are arranged on the electric control board, and the second plug board is inserted in the jacks. Based on the structure, the motor structure can be convenient for optimizing the whole size of the motor, greatly save the installation space in the motor, and has the advantages of simple and compact structure, convenience in installation and the like.

Description

Connection structure of automatically controlled board

Technical Field

The utility model relates to a direct current brushless motor technical field especially relates to a connection structure of automatically controlled board.

Background

The brushless dc motor is a motor without a brush and a commutator (or a collector ring), has the advantages of the conventional dc motor, and simultaneously cancels a carbon brush and a slip ring structure, so that the brushless dc motor is widely applied to the fields of automobiles, tools, industrial control, automation, aerospace and the like. In the prior art, circuit boards configured in a brushless direct current motor are all fixed through a mounting frame, so that the problems that the size of the motor is difficult to optimize, the internal structure is complicated, the circuit board is inconvenient to disassemble and assemble and the like are caused. Accordingly, there is a need for an improved connection structure to solve the above problems.

SUMMERY OF THE UTILITY MODEL

To the weak point that exists in the above-mentioned technique, the utility model provides a connection structure of automatically controlled board.

The utility model provides a technical scheme that its technical problem adopted is:

a connection structure of an electric control board is applied to a direct current brushless motor with a stator assembly, and the direct current brushless motor is provided with the electric control board; the connection structure of the electric control board comprises: a plurality of plug-in components fixedly arranged at the rear part of the stator assembly; and a plurality of connectors correspondingly inserted on the insertion assembly; the connecting piece includes: connecting the substrates; a first plug board formed in the middle of the front end of the connection substrate; a second plug board formed in the middle of the front end of the connection substrate; and two third plugboards respectively arranged at two sides of the first plugboard; wherein, a plurality of jacks are arranged on the electric control board, and the second plug board is inserted in the jacks.

Preferably, at least two pressing plates are arranged on the connecting substrate; wherein, a hooking and pressing gap is configured between the pressing plate and the connecting substrate and used for fixing the enameled wire.

Preferably, first strip-shaped teeth are formed on two sides of the first inserting plate; a second strip-shaped tooth is formed on one side of the third inserting plate back to the first inserting plate.

Preferably, the third insert plate is formed with a hook plate on a side facing the first insert plate.

Preferably, the rear end portion of the second insert plate is provided with a plurality of chamfers.

Preferably, the plug-in component is provided with a first slot, a second slot and a third slot; the second slot and the third slot are symmetrically arranged at two sides of the first slot; the first plug board is inserted into the first slot in a matching manner; the two third inserting plates are correspondingly inserted into the second slot and the third slot respectively.

Preferably, the stator assembly includes: a stator; the insulating injection mold is matched and fixed with the stator; and a winding; wherein the plug assembly is arranged at the rear part of the insulation injection mould.

Preferably, the plug assembly and the insulation injection mold are integrally formed.

Preferably, the plurality of plug assemblies are uniformly arranged along the circumference of the insulating injection mold.

Preferably, the number of plug assemblies is six.

Compared with the prior art, the utility model, its beneficial effect is: the utility model provides a connection structure of an electric control board, which can position the electric control board at the rear part of a stator assembly through a connecting piece, and the connecting piece, a splicing component and the electric control board are all in a plug-in mounting relation; based on the structure, the motor structure can be convenient for optimizing the whole size of the motor, greatly save the installation space in the motor, and has the advantages of simple and compact structure, convenience in installation and the like.

Drawings

Fig. 1 is a schematic view of an external structure of a dc brushless motor according to the present invention;

fig. 2 is a schematic diagram of an internal structure of a dc brushless motor according to the present invention;

fig. 3 is an exploded schematic view of a dc brushless motor according to the present invention;

fig. 4 is a schematic view of the overall structure of the stator assembly of the present invention;

FIG. 5 is a schematic view of an exploded structure of the stator assembly of the present invention;

fig. 6 is a second exploded view of the stator assembly of the present invention;

fig. 7 is a schematic view of the overall structure of the middle insulation injection mold of the present invention;

fig. 8 is a schematic view of a partial structure of an insulation injection mold according to the present invention;

fig. 9 is one of the schematic structural diagrams of the rotor assembly of the present invention;

fig. 10 is a second schematic structural view of the rotor assembly of the present invention;

FIG. 11 is a schematic view of an assembly structure of the rotor and the permanent magnet according to the present invention;

fig. 12 is a schematic view of an assembly structure of the insulating sleeve of the present invention;

fig. 13 is a schematic view of an assembly structure of the electric control board of the present invention;

fig. 14 is a schematic structural view of a connecting member according to the present invention;

fig. 15 is a second schematic structural view of a connecting member according to the present invention;

fig. 16 is an exploded view and an assembled view of the middle magnetic ring assembly of the present invention.

Detailed Description

The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.

The utility model provides a connection structure of automatically controlled board, it is applied to the brushless DC motor who has stator assembly 2 for fix automatically controlled board 4 on stator assembly 2. As shown in fig. 1 to 16, the dc brushless motor includes:

a housing 10 having a mounting chamber 100 formed therein;

a stator assembly 2 fixedly disposed in the mounting cavity 100;

a rotor assembly 3 rotatably disposed in the mounting cavity 100;

an electric control board 4 fixedly arranged in the mounting cavity 100;

a first end cap 11 fixedly disposed at a front end of the housing 10 for closing a front port of the installation cavity 100; and

a second end cap 12 fixedly disposed at a rear end of the housing 10 for closing a rear port of the installation cavity 100;

specifically, the rotor assembly 3 is rotatably disposed in the stator assembly 2; the electric control board 4 is fixed at the rear part of the stator assembly 2 through a connecting piece 9;

the rotor assembly 3 comprises a motor shaft 31 with at least one end extending out of the installation cavity 100, a rotor 32 is fixed on the motor shaft 31, and a plurality of permanent magnets 33 which are uniformly arranged are fixed on the outer peripheral surface of the rotor 32;

the stator assembly 2 includes a plurality of uniformly arranged core bodies 212, and the core bodies 212 are disposed toward the rotor 32; each iron core body 212 is wound with a winding 23; the electric control board 4 can respectively electrify/cut off the plurality of windings 23 according to requirements, and the electrified windings 23 can generate a magnetic field acting on the permanent magnet 33 so as to drive the rotor assembly 3 to rotate; wherein the number of the iron core bodies 212 is equal to that of the permanent magnets 33;

one end of the motor shaft 31 extends out of the first end cover 11; the first end cap 11 is detachably connected to the housing 10 by a first bolt 131; a first sealing ring 53 is arranged between the first end cover 11 and the shell 10; the first end cover 11 is provided therein with a first bearing 61 for supporting the motor shaft 31;

the second end cap 12 is detachably connected to the housing 10 by a second bolt 132; a second sealing ring 54 is arranged between the second end cover 12 and the shell 10; the second end cap 12 is provided therein with a second bearing 62 for supporting the motor shaft 31.

Further, the iron core body 212 and the permanent magnet 33 are each defined as six.

In order to facilitate mounting and fixing the dc brushless motor, the first end cover 11 is provided with a plurality of first mounting holes 110, and the second end cover 12 is provided with a plurality of second mounting holes 120; the first mounting hole 110 and the second mounting hole 120 are both threaded holes.

As an embodiment of the present invention, a power line connector (power line connector) 15 and a control circuit connector 14 are respectively fixed on the housing 10; a distance is configured between the power line connector 15 and the control circuit connector 14 so as to avoid mutual interference between a power circuit and a control circuit;

wherein, the power line connector 15 and the control circuit connector 14 are both connected to the electric control board 4 in an electrified way; a plurality of wiring terminals 41 are fixed on the electric control board 4; one end of the power circuit is formed on the power line connector 15, and the other end of the power circuit is connected to the wiring terminal 41 through a screw, so that the power circuit is convenient to disassemble and assemble;

specifically, the number of the terminals 41 is three.

An electric control socket 42 is also fixed on the electric control plate 4; one end of the control circuit is formed on the control circuit connector 14, and the other end of the control circuit is formed on the electric control plug 141; the electrical control plug 141 can be mated with the electrical control socket 42.

In a specific application scenario, the motor shaft 31 is provided with a first annular groove 312 and a second annular groove 313; a first snap spring 71 is clamped in the first annular groove 312, and a second snap spring 72 is clamped in the second annular groove 313; the first bearing 61 is sleeved on the motor shaft 31 and is arranged between the first clamp spring 71 and the second clamp spring 72; based on this, the first bearing 61 can be defined on the motor shaft 31 in the axial direction of the motor shaft 31.

Further, a key slot 310 is further formed on the motor shaft 31; a flat key 311 is installed in the key groove 310 to transmit the torque output outward through the motor shaft 31.

As an embodiment of the present application, a front boss 111 is formed on the first end cover 11, a third ring groove (not shown) is formed in the first end cover 11, and a third snap spring 73 is snapped in the third ring groove;

wherein the first bearing 61 is disposed between the front boss 111 and the third spring 73; based on the above structure, the first bearing 61 can be defined in the first end cap 11 in the axial direction of the motor shaft 31.

In the present application, the second bearing 62 is defined on the motor shaft 31 in the axial direction of the motor shaft 31; a rear boss 121 is formed on the second end cover 12, and the second bearing 62 abuts against the front part of the rear boss 121; wherein a wave-shaped gasket 74 is arranged between the second bearing 62 and the rear boss 121; based on the above structure, the motor shaft 31 can be prevented from being jumped in the axial direction thereof.

In order to ensure that the stator assembly 2, the rotor assembly 3, the electronic control board 4 and various circuits in the dc brushless motor can operate safely, an insulating paper 51 and an insulating sleeve 52 are fixedly arranged in the mounting cavity 100 to protect against electric shock;

wherein, the insulation paper 51 is sleeved on the motor shaft 31, fixedly arranged at the rear part of the first end cover 11, and arranged at the front part of the stator assembly 2;

the insulating sleeve 52 is fixedly arranged at the rear part of the stator assembly 2 and covers the periphery of the electric control board 4.

As an embodiment of the present invention, the stator assembly 2 includes

A stator 21;

an insulating injection mold 22 fixed in a matching manner with the stator 21; and

the winding 23;

wherein the stator 21 comprises a stator sleeve 211 and the iron core body 212, and the iron core body 212 is integrally formed inside the stator sleeve 211; an installation gap 215 is arranged between two adjacent iron core bodies 212; the stator sleeve 211 and the iron core body 212 are made of silicon steel;

specifically, the iron core body 212 comprises

An iron core 213 having one end connected to the stator sleeve 211; and

a core end plate 214 disposed at the other end of the core portion 213;

wherein the winding 23 is wound around the outside of the core portion 213.

Further, the insulation injection mold 22 includes

A base mold 221 uniformly provided with a plurality of insertion grooves 220 along a circumferential direction thereof; and

an iron core sleeve 224 formed inside the base mold 221;

wherein, the iron core sleeves 224 correspond to the embedded grooves 220 one by one; the iron core sleeve 224 comprises an iron core sleeve 2241 and an iron core sleeve plate 2242; the iron core sleeve plate 2242 is provided with a sinking groove 2240 communicated with the embedded groove 220.

It can be understood that the core portions 213 pass through the insertion slots 220 and are inserted into the core sleeves 2241 in a one-to-one correspondence; the core end plate 214 is fixedly arranged in the sink 2240; the winding 23 is fixedly wound on the outer side wall of the iron core sleeve 2241; in addition, the winding 23 can be confined on the core sleeve 2241 without falling off by the core sleeve 2242.

In order to enhance the strength of the base mold 221, a plurality of base mold reinforcing ribs 2211 are formed inside the base mold 221; the base mold reinforcing rib 2211 is disposed between two adjacent core cases 224.

Meanwhile, in order to improve the supporting strength of the core sleeve 224 to the winding 23, a first reinforcing rib 2243 and a second reinforcing rib 2244 are formed on the core sleeve plate 2242;

the first reinforcing rib 2243 is formed at the front end of the inner side of the iron core sleeve 2242, and the second reinforcing rib 2244 is formed at the rear end of the inner side of the iron core sleeve 2242;

specifically, the number of the first reinforcing ribs 2243 is one, and the number of the second reinforcing ribs 2244 is two.

More specifically, a first retaining ring 222 and a second retaining ring 223 are formed on the periphery of the base mold 221; the fitting groove 220 is disposed between the first retaining ring 222 and the second retaining ring 223; the stator sleeve 211 is defined between the first retainer ring 222 and the second retainer ring 223.

In a specific application scenario, the winding 23 has a plurality of enameled wires (not shown) connected to the terminals 41; in order to avoid interference among the enameled wires and enhance insulation, and in order to make the trend of the enameled wires more regular, a plurality of groove assemblies 24 are arranged at the rear part of the insulation injection mold 22;

wherein a plurality of the groove assemblies 24 are uniformly arranged along the circumferential direction of the insulating injection mold 22; a trace gap 246 is disposed between two adjacent groove assemblies 24.

Specifically, the number of the trace gaps 246 is six.

Further, the groove assembly 24 includes a first groove 241, a second groove 242, a third groove 243, and a fourth groove 244 arranged in parallel; the first groove 241, the second groove 242, the third groove 243, and the fourth groove 244 are sequentially disposed at the rear of the insulation injection mold 22;

the lengths of the first groove 241, the second groove 242, the third groove 243 and the fourth groove 244 are sequentially reduced, and the two groove ends are respectively formed into a stepped edge 245;

specifically, the routing gap 246 is defined between two opposite edges 245, and the routing gap 246 is flared from front to back; based on the above structure, the enameled wires configured on the plurality of windings 23 can be wound and embedded in the groove assembly 24 and connected to the electric control board 4; not only the winding space is optimized, but also the insulating capability among the windings is improved.

In order to reduce the moment of inertia of the rotor assembly 3 and enable high dynamic acceleration response, the rotor 32 is provided with a through-slot assembly (not shown in the figure); the through groove component comprises

A plurality of first through grooves 321 arranged in the axial direction of the motor shaft 31; and

a plurality of second through grooves 322 arranged in the axial direction of the motor shaft 31;

wherein the first through grooves 321 are uniformly arranged along the circumferential direction of the rotor 32; the second through grooves 322 are uniformly disposed between two adjacent first through grooves 321.

Further, the number of the first through grooves 321 is four, and the number of the second through grooves 322 is twelve; it can be understood that three second through grooves 322 are disposed between every two adjacent first through grooves 321.

Still further, the longitudinal section of the first through groove 321 is square, and the longitudinal section of the second through groove 322 is circular; the central axis of the first through groove 321 and the central axis of the second through groove 322 are equal to the central axis of the motor shaft 31.

By the above manner, the rotational inertia of the rotor assembly 3 can be reduced, and the heat dissipation capability of the rotor assembly 3 is improved.

In the present application, the permanent magnet 33 is bonded to the rotor 32; a plurality of convex ribs 323 are uniformly formed on the outer circumferential surface of the rotor 32 to partition the plurality of permanent magnets 33; wherein, a permanent magnet 33 is arranged between every two adjacent convex ridges 323.

In order to strengthen the fastening force with the motor shaft 31, a plurality of arc-plate-shaped connecting protrusions 324 are uniformly formed on the inner circumferential surface of the rotor 32; wherein the plurality of coupling protrusions 324 are disposed at both front and rear ends of the rotor 32; the total number of the coupling protrusions 324 is six.

As one embodiment of the present application, the insulating sleeve 52 is cylindrical, and a plurality of slips 521 are fixedly disposed at a front end portion thereof; the insertion bars 521 are uniformly arranged along the circumferential direction of the insulating sleeve 52.

Specifically, the number of the cuttings 521 is six.

In the present application, a plurality of positioning grooves 210 are disposed on the outer circumferential surface of the stator 21; the inserting bars 521 can be inserted into the positioning grooves 210 in a one-to-one correspondence manner; in this way, the insulating sleeve 52 can be fixedly disposed at the rear of the stator assembly 2.

Furthermore, a plurality of squeezing blocks 522 are arranged on the outer peripheral surface of the insulating sleeve 52; the extrusion blocks 522 are correspondingly arranged at the rear parts of the cuttings 521 one by one; the top rear end of the pressing block 522 is provided with a wedge surface 523 to facilitate press-fitting on the inner wall of the housing 10.

As an embodiment of the present invention, a plurality of plug-in components 25 are integrally formed at the rear portion of the insulation injection mold 22 for fixing the connection member 9; wherein the plug assembly 25 is correspondingly arranged at the rear part of the groove assembly 24.

Specifically, the plug assembly 25 is configured with a first slot 251, a second slot 252 and a third slot 253; the second slot 252 and the third slot 253 are symmetrically disposed at both sides of the first slot 251.

In the present application, the connection member 9 comprises

A connection substrate 90;

a first insert plate 91 formed in the middle of the front end of the connection substrate 90;

a second insert plate 92 formed in the middle of the front end of the connection substrate 90; and

two third insertion plates 93 respectively arranged at both sides of the first insertion plate 91;

the first plug board 91 can be inserted into the first slot 251 in a matching manner; two third inserting plates 93 can be correspondingly inserted into the second inserting groove 252 and the third inserting groove 253; a plurality of jacks 40 are formed in the electric control board 4, and the second plug board 92 can be inserted into the jacks 40; based on the above structure, the electric control board 4 can be positioned at the rear of the stator assembly 2.

In order to improve the insertion stability between the connecting piece 9 and the insertion component 25, first strip-shaped teeth 911 are formed on both sides of the first insertion plate 91; a second strip-shaped tooth 932 is formed on one side of the third inserting plate 93, which is back to the first inserting plate 91; a hook plate 931 is formed on a side of the third insert plate 93 facing the first insert plate 91.

In order to facilitate the insertion of the second insertion plate 92 into the insertion hole 40, the rear end portion of the second insertion plate 92 is provided with a plurality of chamfers 921.

In order to prevent the partial enameled wire from interfering with each element in the motor, at least two pressing plates 95 are disposed on the connection substrate 90, wherein the partial enameled wire from the groove assembly 24 to the electric control board 4 is in an unfixed state; a hooking and pressing gap 950 is configured between the pressing plate 95 and the connecting substrate 90, and the enameled wire is fixedly configured in the hooking and pressing gap 950; based on the above structure, a portion of the enamel wire connected from the groove assembly 24 to the electric control board 4 can be effectively fixed.

In order to enable the electric control board 4 to accurately electrify/cut off the plurality of windings 23 respectively, a magnetic ring assembly 8 is fixed on the motor shaft 31; the electric control board 4 is provided with a plurality of hall sensors 43 for detecting the rotation degree of the magnetic ring assembly 8.

Specifically, three hall sensors 43 are provided, and are uniformly arranged on the outer side of the magnet ring assembly 8 in the circumferential direction.

As an embodiment of the present invention, the magnetic ring assembly 8 comprises

A magnetic ring body 81; and

an annular insert 82;

wherein the annular insert 82 is fixedly disposed on the motor shaft 31; the magnetic ring body 81 and the annular insert 82 are molded into a whole by injection; through the mode, the strength of the magnetic ring body 81 is increased, so that the magnetic ring body 81 is not easy to damage.

In order to firmly connect the magnet ring 81 and the annular insert 82, an annular tooth 821 is formed on an outer circumferential surface defining the annular insert 82.

While the embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields of application suitable for this invention, and further modifications may be readily made by those skilled in the art, and the invention is therefore not limited to the specific details and illustrations shown and described herein, without departing from the general concept defined by the claims and their equivalents.

Claims (10)

1. A connecting structure of an electric control board is applied to a direct current brushless motor with a stator assembly (2), and an electric control board (4) is configured in the direct current brushless motor; it is characterized in that the connecting structure of the electric control board comprises:

a plurality of plug-in modules (25) arranged fixedly at the rear of the stator assembly (2); and

a plurality of connectors (9) correspondingly plugged on the plug-in components (25);

the connecting piece (9) comprises:

a connection substrate (90);

a first insert plate (91) formed in the middle of the front end of the connection substrate (90);

a second insert plate (92) formed in the middle of the front end of the connection substrate (90); and

two third boards (93) respectively disposed on both sides of the first board (91);

the electric control board (4) is provided with a plurality of jacks (40), and the second plug board (92) is inserted into the jacks (40).

2. The connecting structure of an electric control board according to claim 1, wherein at least two pressing plates (95) are provided on the connecting base plate (90);

and a hooking and pressing gap (950) is configured between the pressing plate (95) and the connecting substrate (90) and used for fixing the enameled wire.

3. The connecting structure of an electric control board according to claim 1, wherein the first inserting plate (91) is formed with first strip-shaped teeth (911) on both sides; and a second strip-shaped tooth (932) is formed on one side of the third inserting plate (93) back to the first inserting plate (91).

4. The connecting structure of electric control boards according to claim 3, wherein the third inserting board (93) is formed with a hook board (931) at a side thereof facing the first inserting board (91).

5. The connecting structure of electric control boards according to claim 1, wherein the rear end portion of the second inserting plate (92) is provided with a plurality of chamfers (921).

6. The connection structure of an electronic control board according to claim 1, wherein the plug-in module (25) is provided with a first slot (251), a second slot (252) and a third slot (253); the second slot (252) and the third slot (253) are symmetrically arranged at two sides of the first slot (251);

the first plug board (91) is inserted into the first slot (251) in a matching manner; the two third inserting plates (93) are correspondingly inserted into the second inserting groove (252) and the third inserting groove (253) respectively.

7. The connection structure of an electric control board according to claim 1, wherein the stator assembly (2) comprises:

a stator (21);

an insulating injection mold (22) which is matched and fixed with the stator (21); and

a winding (23);

wherein the plug assembly (25) is arranged at the rear of the insulating injection mould (22).

8. The connection structure of an electric control board according to claim 7, wherein the plug-in module (25) and the insulating injection mold (22) are integrally formed as a single body.

9. The connection structure of an electric control board according to claim 7, wherein a plurality of the plug assemblies (25) are uniformly arranged along a circumferential direction of the insulating injection mold (22).

10. Connection structure of electric control boards according to any of claims 1-9, characterised in that the number of plug assemblies (25) is six.

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