CN117879219A - Three-phase wiring board, molding method and application thereof, and injection mold - Google Patents

Abstract

The invention discloses a three-phase wiring board, a forming method and application thereof, and an injection mold, wherein the three-phase wiring board comprises an injection molding board and three electric connection pieces, the injection molding board is annular, the three electric connection pieces are respectively and integrally connected to the injection molding board in an injection molding way, the injection molding board comprises an inner end face facing one side of a stator and an outer end face facing the outer side, the main bodies of the three electric connection pieces are respectively arc-shaped arranged around the center of the injection molding board, and each electric connection piece is positioned between the inner ring and the outer ring of the injection molding board; and a first connecting structure is arranged on the outer side edges of the first part and the second part of each electric connection piece and is used for being connected with the stator coil. According to the three-phase wiring board provided by the invention, the three Z-shaped electric connection pieces are arranged in the same direction to form a ring shape, and then the ring-shaped electric connection pieces are subjected to injection molding, so that each electric connection piece is arranged on two parallel planes, and each electric connection piece is more conveniently positioned and fixed during injection molding.

Description

Three-phase wiring board, molding method and application thereof, and injection mold

Technical Field

The invention relates to the field of motor operation, in particular to a three-phase wiring board, a molding method and application thereof, and an injection mold.

Background

The in-phase of the three-phase windings of the existing motor are required to be connected by a bridge connection piece. The current electric connection piece is generally the platy structure, and a plurality of electric connection pieces are arranged along the axial stack to cause the electric connection piece layer number of busbar assembly more, be provided with the insulating layer between the electric connection piece of adjacent layer moreover, can increase one deck insulating layer when increasing the one deck electric connection piece, make the axial size ratio of busbar assembly great, and then make the axial height of motor stator assembly higher, cause the axial size increase and the volume increase of motor, influenced the compatibility of motor and complete machine.

In the prior art, although two layers of conductive sheets are arranged in a staggered manner, two conductive sheets with different planes are adopted, and each conductive sheet is only arranged on one plane, so that the conductive sheets are difficult to position in the axial direction, and the injection molding is difficult.

Disclosure of Invention

The technical problem to be solved by the embodiment of the invention is to provide a three-phase wiring board, a molding method thereof, an injection mold, a stator module, a motor and a middle motor, and solve the problem that positioning is difficult in an injection molding process when planar bus bars are arranged in a stacked mode.

In order to solve the technical problems, the invention provides a three-phase wiring board, which comprises an injection molding board and three electric connection pieces, wherein the injection molding board is made of insulating materials and is annular, the injection molding board comprises an inner end face facing one side of a stator and an outer end face facing the outer side, the main bodies of the three electric connection pieces are respectively arc-shaped and are arranged around the center of the injection molding board, each electric connection piece is positioned between the inner ring and the outer ring of the injection molding board, the main body of each electric connection piece is Z-shaped in a Zhou Xiangzong section of the injection molding board, the three-phase wiring board comprises a first part, a second part and a third part, the third part is connected with the first part and the second part, the first part is close to or is positioned on the outer end face, and the second part is close to or positioned on the inner end face, wherein one part of any electric connection piece is projected on the second part of the adjacent electric connection piece in the axial direction of the stator;

at least a first connecting structure is arranged on the outer side edges of the first part and the second part of each electric connection piece and is used for being connected with the stator coil.

Optionally, the three electric connection pieces are integrally connected to the injection molding plate in an injection molding way;

or after the injection molding plate is formed by the inner end surface part and the outer end surface part respectively, the two parts are butted with the three electric connection sheets in the middle from the end surfaces of the two sides, and the two parts are butted to form the injection molding plate while the electric connection sheets are fixed.

Optionally, in the same power receiving piece, the arc length of the first portion is greater than the arc length of the second portion.

Optionally, the arc length of the first portion is between 1/4 circumference and 1/3 circumference and the arc length of the second portion is between 1/8 circumference and 1/4 circumference.

Optionally, the first connection structure is located inside an outer ring of the injection plate.

Optionally, the first connection structure is bent towards the outer end face of the injection molding plate.

Optionally, the first connection structure comprises a V-shaped connection block.

Alternatively, the span of the two first connection structures on the same power receiving sheet on the circumference is 150-180 degrees; the first connection structures of the different electric connection sheets keep a distance.

Optionally, a wire guiding groove is arranged at the outer edge of the injection molding plate corresponding to each first connecting structure, or a wire guiding hole penetrating through two end faces of the injection molding plate is arranged on the injection molding plate.

Optionally, each of the power receiving pieces is further provided with a second connection structure for connecting with a terminal of an external circuit.

Optionally, the second connection structure is connected to an outer side or an inner side of the main body of the power receiving piece.

Optionally, the second connection structure is located between the inner ring and the outer ring of the injection plate.

Optionally, the second connection structure is perpendicular to the outer end surface of the injection molding plate.

Optionally, the second connection structure is a lug, and four sides of the end of the lug are chamfered.

Optionally, the power connection piece includes a first power connection piece, a second power connection piece and a third power connection piece, wherein:

the second connecting structure of the first power receiving piece is positioned at the end part of the first part far away from the third part;

the second connecting structure of the second power receiving piece is positioned at a position, close to the third part, on the first part of the second power receiving piece;

the second connecting structure of the third power receiving piece is positioned at the end part of the second part far away from the third part.

Alternatively, the second connection structures of the three power receiving pads are arranged at the same angle at intervals.

Optionally, the second connection structure of the first electrical connection piece is connected to the outer side edge of the first electrical connection piece;

the second connecting structure of the second electric connection piece is connected to the outer side edge of the second electric connection piece;

the second connecting structure of the third power connection piece is connected to the outer side edge of the third power connection piece;

and the second connection structures of the three power connection pieces are positioned on the same plane.

Optionally, the first connection structure and the second connection structure are located between the inner ring and the outer ring of the injection molding plate.

Optionally, an arc notch is further formed in the outer ring of the injection molding plate;

the injection molding plate is also provided with positioning holes, and the positioning holes penetrate through the surfaces of two sides of the injection molding plate; the number of the positioning holes is 3, and the positioning holes are correspondingly positioned in the middle of each power connection piece.

Optionally, a first supporting hole is arranged in a region between the first parts of two adjacent electric connection sheets on the outer end surface of the injection molding plate, and the first supporting hole is communicated with the second part of the corresponding electric connection sheet on the inner end surface, so that the first supporting hole is a blind hole;

and a second supporting hole is formed in the inner end face of the injection molding plate in a region between the second parts of the two adjacent electric connecting sheets, and the second supporting hole is communicated with the first part of the corresponding electric connecting sheet on the outer end face, so that the second supporting hole is a blind hole.

In order to solve the technical problems, the invention provides a molding method of a three-phase wiring board, comprising the following steps:

providing an injection mold;

providing a power connection piece;

placing the electric connection sheet in an injection cavity of an injection mold according to the position relation of the wiring board molding and fixing;

and injecting an insulating material into the injection molding cavity, and cooling and molding.

In order to solve the technical problem, the invention provides an injection mold of the three-phase wiring board, comprising:

the device comprises a base and an upper gland, wherein a circular boss is arranged at the center of the base, a circular groove in butt joint with the boss is arranged at the center of the upper gland, an annular step surface surrounding the groove is arranged on the lower end face of the upper gland, and an annular cavity is formed by butt joint of the base and the upper gland; the annular step surface of the upper gland is used for forming the inner end surface of the injection molding plate, and the base surface around the boss is used for forming the outer end surface of the injection molding plate.

Optionally, the base is provided with a first accommodating part for accommodating the first connecting structure and a second accommodating part for accommodating the second connecting structure.

Optionally, the device further comprises a slider structure for being inserted into the first accommodating portion of the base from the side of the base to separate the parting surface of the base from the first connecting structure.

Optionally, the base with go up and fix a position the connection through a plurality of location structures between the gland, location structure is including setting up the projection on the base and setting up the shrinkage pool on last gland.

Optionally, the base is provided with a first support column supported on the second part, so that a first support hole is formed after the injection molding plate is molded.

Optionally, the first support column is adjustably connected in the base.

Optionally, the base is further provided with a positioning column, and the positioning column is abutted on the annular step surface so as to form a positioning hole after the injection molding plate is molded.

Optionally, a second support column supported on the first part is arranged on the step surface of the upper gland so as to form a second support hole after the injection molding plate is molded.

Optionally, the step surface edge of the upper gland is also provided with a bump structure so as to form a lead groove after the injection molding plate is molded.

Optionally, the edge of the step surface of the upper gland is also provided with an arc-shaped block so as to form an arc-shaped notch after the injection molding plate is molded.

In order to solve the technical problems, the invention provides a stator module, which comprises a stator and a three-phase wiring board, wherein the three-phase wiring board is connected to the end part of the stator and is coaxially arranged, the stator comprises a stator core and a stator coil, and the stator coil is correspondingly connected to a first connecting structure of the three-phase wiring board.

Alternatively, the tabs of the stator coils of the same phase are closely connected in groups according to the distance from the first connection structure and pass through the lead grooves or the lead holes, and then connected with the first connection structure.

In order to solve the technical problem, the invention provides a motor, which comprises the stator module or the three-phase wiring board, wherein a second connecting structure of the three-phase wiring board is connected with a control circuit of the motor.

In order to solve the technical problems, the invention provides a centrally-mounted motor, which comprises a stator module or a three-phase wiring board, wherein a second connecting structure of the three-phase wiring board is connected with a control circuit of the centrally-mounted motor.

The implementation of the invention has the following beneficial effects:

according to the three-phase wiring board provided by the invention, the three Z-shaped electric connection pieces are arranged in the same direction to form a ring shape, and then injection molding is performed, so that each electric connection piece is positioned and fixed on two parallel planes, and each electric connection piece is positioned and fixed more conveniently during injection molding; on the basis, the first connecting structure is further arranged on the outer side edge of the electric connection piece, so that the structural layout is more reasonable, and the lead connection of the stator winding is facilitated; because the two parts of each electric connection sheet on the two planes are respectively provided with the first connection structure, the first connection structures can be staggered on different planes, and the total number is only 6, compared with the connection structures of more than 20 in the prior art, the number of the first connection structures is greatly reduced, and the lead connection of the stator winding is more convenient;

according to the molding method of the three-phase wiring board, provided by the invention, the production efficiency can be greatly improved through one-time injection molding of the injection mold, and the three-phase wiring board is convenient to position and fix due to the structure of the three-phase wiring board, so that the product quality of the molded three-phase wiring board can be ensured;

according to the injection mold provided by the invention, the annular cavity of the injection molding three-phase wiring board is formed through the structural design of the base and the upper gland, and the first part and the second part of the power connection sheet are accommodated in the annular cavity, so that the three-phase wiring board can be injection molded at one time;

according to the stator module provided by the invention, after the stator windings are connected through primary confluence, the stator windings are connected to the first connection structure of the three-phase wiring board, so that the volume of the stator windings is reduced as a whole, and the space between the stator windings and the three-phase wiring board can be reasonably utilized, so that the structure of the whole stator windings is more compact;

the motor provided by the invention has the advantages that as the three-phase wiring board (or the stator module using the three-phase wiring board) is used, the whole volume is smaller;

the centrally-mounted motor provided by the invention has the advantages that the three-phase wiring board (or the stator module using the same) is used, so that the volume is smaller as a whole.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application and do not constitute an undue limitation on the application.

FIG. 1 is a schematic diagram of a three-phase wiring board in an embodiment of the invention;

FIG. 2 is a schematic diagram of a three-phase wiring board in an embodiment of the invention;

fig. 3 is a schematic plan view of a three-phase wiring board in an embodiment of the present invention;

FIG. 4 is a cross-sectional view of FIG. 3;

FIG. 5 is a schematic diagram of an exploded construction of a three-phase wiring board in an embodiment of the invention;

FIG. 6 is a schematic view of three electrical tabs of a three-phase patch panel according to an embodiment of the present invention;

FIG. 7 is a schematic view of a three-phase patch panel according to an embodiment of the present invention;

FIG. 8 is a schematic view of a three-phase patch panel in which a second tab is configured in accordance with an embodiment of the present invention;

fig. 9 is a schematic structural view of a three-phase wiring board in which a third tab is provided in an embodiment of the present invention;

FIG. 10 is a schematic view of an injection mold according to an embodiment of the present invention;

FIG. 11 is a schematic view of a base of an injection mold according to an embodiment of the present invention;

fig. 12 is a schematic structural view of an upper gland of an injection mold in an embodiment of the present invention.

Reference numerals in the drawings:

100-three-phase wiring board;

110-injection molding a plate; 111-inner end face; 112-an outer end face; 113-a wire slot; 114-arc notch; 115-positioning holes; 116-a first support hole; 117-a second support hole; 118-an outer ring; 119-an inner ring;

120-connecting the electric sheet; 121-a first power connection piece; 122-a second power connection piece; 123-a third power connection piece; 1201-first part; 1202-a second portion; 1203-third part; 1204-a first connection structure; 1205-a second connection structure;

300-an injection mold;

310-base; 311-boss; 312-a first receptacle; 313-a second receptacle; 314-a slider structure; 315-convex columns; 316-first support columns; 317-positioning columns;

320-capping; 321-grooves; 322-annular step surface; 323-concave hole; 324-second support column; 325 bump structure; 326-arc-shaped block.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 to 9, the present embodiment provides a three-phase wiring board 100, which includes an injection molding board 110 and three power connection pieces 120, the injection molding board 110 is made of insulating material and is ring-shaped, the injection molding board 110 includes a lower end face 111 facing one side of a stator and an upper end face 112 facing a controller, wherein the bodies of the three power connection pieces 120 are respectively arc-shaped and arranged around the center of the injection molding board 110, each power connection piece 120 is located between an inner ring 118 and an outer ring 119 of the injection molding board 110, two adjacent power connection pieces 120 are separated by the injection molding board 110 so as to insulate the two adjacent power connection pieces from each other, and the body of the power connection piece 120 is Z-shaped in a Zhou Xiangzong section of the injection molding board 110, including a first portion 1201 located at the outer end face 112, a second portion 1202 located at the inner end face 111, and a third portion 1203 connecting the first portion 1201 and the second portion 1202; the first portion 1201 is located near or at the outer end face 112 and the second portion 1202 is located near or at the inner end face 111, wherein a portion of the first portion 1201 of any one of the tabs 120 is projected in the stator axial direction over the second portion 1202 of the adjacent tab 120. By arranging the electric connection pieces 120 on two different end faces, the structural layout of the electric connection pieces is more reasonable, and each electric connection piece 120 is provided with corresponding positioning and fixing structures on the two end faces, so that the electric connection pieces can be conveniently fixed by an injection mold during injection molding; the first connection structure 1204 is arranged on the outer side of the first portion 1201 and the second portion 1202 of each electrical connection piece 120 and is used for being connected with a stator coil, the first connection structure 1204 is arranged on the outer side to be more reasonably distributed, the space occupying the inner side is avoided, meanwhile, the first connection structure 1204 is designed to extend outwards, only two layers of middle insulation layers are provided in total, the thickness of the whole three-phase wiring board can be reduced, and therefore the whole occupied space of the three-phase wiring board is reduced.

According to the three-phase wiring board provided by the invention, the three Z-shaped electric connection pieces are arranged in the same direction to form a ring shape, and then injection molding is performed, so that each electric connection piece is positioned and fixed on two parallel planes, and each electric connection piece is positioned and fixed more conveniently during injection molding; on the basis, the first connecting structure is further arranged on the outer side edge of the electric connection piece, so that the structural layout is more reasonable, and the lead connection of the stator winding is facilitated; because each electric connection piece sets up a first connection structure in two parts on two planes respectively to can make first connection structure stagger on different planes, and total only 6, compare with the wiring structure that the prior art is very often 20 more, first connection structure quantity reduces by a wide margin, the lead connection of stator winding of being convenient for more.

Three of the conductive strips 120 may be integrally injection molded onto the injection molded plate 110 to form a complete three-phase wiring board 100.

Alternatively, the injection molding plate 110 may be divided into two parts according to the outer end surface 112 and the inner end surface, and each part may be formed by butt-jointing, wherein each part forms a butt-jointing groove adapted to the external shape of the power connection piece 120. Optionally, an insulating adhesive is coated on the butt surface, so that the structure is more stable after the injection molding plate 110 is connected with the electric connection piece 120.

Alternatively, in the same patch panel 120, the arc length of the first portion 1201 is greater than the arc length of the second portion 1202, so that the overall center of gravity is closer to the first portion 1201, and the second connection structure 1205 is typically disposed on the first portion 1201, so that the entire patch panel can be more conveniently fixed and supported.

Alternatively, the arc length of the first portion 1201 is between 1/4 circumference and 1/3 circumference and the arc length of the second portion 1202 is between 1/8 circumference and 1/4 circumference. So that the first portions 1201 of the three conductive tabs can leave a gap on the circumference of the outer end face 112 to configure the first support holes 116, and the second portions 1202 of the three conductive tabs occupy a smaller area on the circumference of the inner end face 111 to more easily configure the second support holes 117; in injection molding, the first portion 1201 is generally located at the lower portion, so that the first portion 1201 is more easily fixed and the second portion 1202 is also easily supported from the bottom.

Optionally, the first connection structure 1204 is located inside the outer ring of the injection molding plate 110, such that the maximum structural dimension is defined by the injection molding plate 110, which can protect the first connection structure 1204 at the outer ring and also make the first connection structure 1204 more regular.

Optionally, the first connection structure 1204 is bent toward the outer end face 112 of the injection molding plate 110, and the bent first connection structure 1204 is also located between the inner ring and the outer ring of the injection molding plate 110, so that the three-phase wiring plate is more regular in structure, and the first connection structure 1204 is prevented from protruding out of the outer ring or the inner ring of the injection molding plate 110, so that the volume of the assembled stator module is not affected. The bent first connection structure 1204 is convenient to wire on the outer end face 112, so that on one hand, the distance between the three-phase wiring board and the stator can be reduced, and on the other hand, the three-phase wiring board can be limited through the outer side in a wire connection mode of the outer end face 112.

Alternatively, as shown in fig. 2, the first connection structure 1204 includes a V-shaped connection block, where the V-shaped connection block and the outer end surface 112 form a parallel relationship, which on one hand facilitates winding and wiring, and on the other hand can make the structure stable and not easy to damage.

Alternatively, the two first connection structures 1204 on the same tab 120 have a circumferential span of between 150-180 degrees, so as to facilitate the connection of the stator windings to the first connection structures 1204 immediately after the preliminary confluence connection; the first connection structures 1204 of the different tabs 120 are kept at a distance from each other so that conduction between the stator windings of the different phases can be avoided.

Optionally, a lead groove 113 is provided at an outer edge of the injection molding plate 110 corresponding to each first connection structure 1204, or a lead hole penetrating both end surfaces of the injection molding plate 110 is provided at the injection molding plate 110. The lead slots 113 facilitate the passage of the stator windings to connect to the first connection structure 1204 of the outer end face 112 and do not allow the stator windings to extend beyond the outer ring of the injection plate 110 due to connection to the first connection structure 1204. Each of the power connection pieces 120 is provided with 2 first connection structures 1204, 6 first connection structures 1204 are shared by three power connection pieces 120, and the 6 first connection structures 1204 are arranged in a dispersed manner on the circumference, so that stator coil wires distributed at different positions can be connected in close proximity. Accordingly, the lead holes may function the same or similar to the lead grooves 113.

Optionally, the outer side of the main body of each tab 120 is further provided with a second connection structure 1205 for connection to a terminal of an external circuit, and the second connection structure 1205 is generally an extension extending outwardly perpendicular to the surface of the outer end surface 112, so as to avoid the increase in the size of the whole terminal structure due to the second connection structure 1205 to the greatest extent. In practice, the second connection structure 1205 may also be connected to the inner side of the power pad 120.

Alternatively, the second connection structure 1205 is located in a region between the outer ring and the inner ring of the injection plate 110, and the second connection structure 1205 protrudes outward from the outer end surface 112 in the axial direction of the stator.

Alternatively, the second connection structure 1205 is bent toward the outer end surface 112 of the injection plate 110 and perpendicular to the surface of the outer end surface 112.

Alternatively, the second connection structure 1205 is a tab, and four sides of the end of the tab are chamfered, so that the cross-sectional dimension of the end of the tab is smaller, and the chamfer structure forms a slope that facilitates insertion of the tab into the receptacle of the external circuit board.

Alternatively, as shown in fig. 6 to 9, the power tab 120 includes a first power tab 121, a second power tab 122, and a third power tab 123, wherein:

as shown in fig. 7, the second connection structure of the first electrical tab 121 is located at an end of the first portion 1201 thereof remote from the third portion 1203; as shown in fig. 8, the second connection structure of the second electrical tab 122 is located on the first portion 1201 thereof near the third portion 1203; as shown in fig. 9, the second connection structure of the third tab 123 is located at an end of the second portion 1202 thereof remote from the third portion 1203. These designs are designed to locate the second connection structures 1205 of the three tabs in a relatively close position to facilitate connection of the tabs to the apertures of the circuit board.

Further alternatively herein, the second connection structures 1205 of the three connection pieces are designed to be arranged at the same angle at intervals, so that the three-phase wiring board 100 in which the 3 second connection structures 1205 are arranged can be more easily connected with the wiring board.

Meanwhile, further optionally, the second connection structure 1205 of the first electrical connection piece 121 is connected to the outer side edge of the first electrical connection piece 121; connecting the second connection structure 1205 of the second electrical connection piece 122 to the inner side edge of the second electrical connection piece 122; connecting the second connection structure 1205 of the third electrical connection piece 123 to the outer side edge of the third electrical connection piece 123; and the second connection structures of the three power connection pieces are positioned on the same plane. Thus, the three power connection pieces 120 can be arranged linearly and equidistantly, so that the three power connection pieces can be inserted into the circuit board more easily, and meanwhile, the circuit on the circuit board can be planned more conveniently.

The above-described design may arrange the second portions 1202 of the three tabs 120 in a relatively concentrated area so that the three-phase terminal board 100 is convenient to connect with a circuit board through the second connection structure 1205 after being connected with the stator.

Optionally, as shown in fig. 2, an arc notch 114 is further provided on the outer ring of the injection molding plate 110, and the arc notch 114 is adapted to the protrusion of the motor housing structure, so as to avoid, thereby effectively reducing the overall structural size of the motor;

positioning holes 115 are further formed in the injection molding plate 110, and the positioning holes 115 penetrate through the two side surfaces of the injection molding plate 110; the number of the positioning holes 115 is 3, and the positioning holes 115 are correspondingly positioned at the middle position of each of the power connection tabs 120, so that the positioning holes 115 can be positioned when the three-phase wiring board 100 is assembled with the stator.

Alternatively, as shown in fig. 2, on the outer end surface 112 of the injection molding plate 110, a first supporting hole 116 is provided in a region between the first portions 1201 of two adjacent power receiving pieces 120, and the first supporting hole 116 is connected to the second portion 1202 of the corresponding power receiving piece 120 on the inner end surface 111, so that the first supporting hole 116 is a blind hole; the first supporting hole 116 can facilitate supporting and positioning of the power receiving piece on the inner end surface from the outer end surface side;

as shown in fig. 1, on the inner end surface 111 of the injection molding board 110, a second supporting hole 117 is provided in a region between the second portions 1202 of two adjacent power connection pieces 120, and the second supporting hole 117 communicates with the first portion 1201 of the corresponding power connection piece 120 on the outer end surface 112, so that the second supporting hole 117 is a blind hole; the second supporting hole 117 can support and position the power receiving piece on the outer end surface 112 side.

As shown in fig. 1 to 12, the present embodiment further provides a method for forming a three-phase wiring board, including:

providing an injection mold 300;

providing a power connection piece 120; three power connection pieces 120 are prefabricated according to actual product requirements;

placing and fixing the electric connection sheet 120 in an injection cavity of an injection mold according to the position relation of the wiring board molding; specifically, the three power connection pieces 120 are arranged on the circumference of the boss 311 of the base 310 of the injection mold 300 according to the actual structure of the product, and then the upper gland 320 is abutted on the base 310;

injecting insulating materials into the injection cavity, cooling and molding, and then opening the injection mold.

According to the molding method of the three-phase wiring board, provided by the invention, the production efficiency can be greatly improved through one-time injection molding of the injection mold, and the three-phase wiring board is convenient to position and fix due to the structure of the three-phase wiring board, so that the product quality of the molded three-phase wiring board can be ensured.

As shown in fig. 10-12, this embodiment also provides an injection mold of a three-phase wiring board, including:

the device comprises a base 310 and an upper gland 320, wherein a circular boss 311 is arranged at the center of the base 310, a circular groove 321 which is in butt joint with the boss 311 is arranged at the center of the upper gland 320, an annular step surface 322 which surrounds the groove 321 is arranged on the lower end surface of the upper gland 320, and an annular cavity is formed by butt joint of the base 310 and the upper gland 320; the annular step surface 322 of the upper gland 320 is used to form the inner end surface 111 of the injection plate 110 and the surface of the base 310 around the boss 311 is used to form the outer end surface 112 of the injection plate 110.

According to the injection mold provided by the invention, the annular cavity of the injection molding three-phase wiring board is formed through the structural design of the base and the upper gland, and the first part and the second part of the power connection sheet are accommodated in the annular cavity, so that the three-phase wiring board can be injection molded at one time.

Alternatively, a first receiving portion 312 for receiving the first connection structure 1204 and a second receiving portion 313 for receiving the second connection structure 1205 are provided on the base 310, the first receiving portion 312 being shaped to fit the shape of the first connection structure 1204, and the second receiving portion 313 may be a hole allowing the second connection structure 1205 to pass through.

Optionally, the injection mold provided in this embodiment further includes a slider structure 314, where the slider structure 314 is configured to be inserted into the first receiving portion 312 of the base 310 from a side of the base 310 to separate the parting plane of the base 310 from the first connecting structure 1204, and after the slider structure 314 is inserted into the first receiving portion 312, the first connecting structure 1204 in the first receiving portion 312 can be positioned to limit the movement of the first connecting structure 1204 in the first receiving portion 312.

Optionally, the base 310 and the upper gland 320 are connected in a positioning manner by a plurality of positioning structures, each positioning structure comprises a convex column 315 arranged on the base 310 and a concave hole 323 arranged on the upper gland 320, when the base 310 is connected with the upper gland 320, the convex column 315 on the base 310 is connected with the concave hole 323 on the upper gland 320 in an alignment manner, so that the base 310 and the upper gland 320 can be mutually positioned, and mutual transverse movement between the base 310 and the upper gland 320 is avoided.

Optionally, the base 310 is provided with a first support column 316 supported on the second portion 1202, and the first support column 316 can be supported on the second portion 1202 of the power receiving sheet 120, so as to position the second portion 1202 to form the first support hole 116 after the injection molding plate 110 is injection molded.

Alternatively, the first support column 316 may be adjustably coupled in the base 310, for example, a coupling hole may be provided in the base 310, the first support column 316 may be inserted into the coupling hole, and the insertion depth of the first support column 316 may be adjusted by threads.

Optionally, the base 310 is further provided with a positioning post 317, and the positioning post 317 abuts against an annular step surface 322 to form the positioning hole 115 after the injection molding plate 110 is molded.

Optionally, the step surface of the upper gland 320 is provided with a second support column 324 supported on the first portion 1201, and the second support column 317 can be supported on the first portion 1201 of the electrical connector, so as to support and position the first portion 1201 to form the second support hole 117 after the injection molding plate 110 is molded. With reference to the first support column 316, the second support column 117 may also be adjustably coupled in the base.

Optionally, the step surface edge of the upper gland 320 is further provided with a bump structure 325 to form the lead groove 113 after the injection molding plate 110 is molded. When the lead hole needs to be designed, the structural design of the support column can also be adopted.

Optionally, the step surface edge of the upper gland 320 is further provided with an arcuate block 326 to form the arcuate gap 114 after the injection molded plate 110 is molded.

The present embodiment further provides a stator module, including a stator and a three-phase wiring board 100, where the three-phase wiring board 100 is connected to an end of the stator and coaxially arranged, the stator includes a stator core and a stator coil, and the stator coil is correspondingly connected to a first connection structure 1204 of the three-phase wiring board 100. The windings of the stator coil may be selectively connected in close proximity depending on the distance between them and the first connection structure 1204. Referring to the three-phase wiring board provided in this embodiment, the wire may pass through the lead slot 113 on the bus plate 120 and then be connected to the first connection structure 1204.

When the three-phase wiring board 100 and the stator coil are adopted for winding, two stator iron cores are wound into a group together to form two wire heads, 6 groups of the two stator iron cores form a stator assembly, 12 wire heads are formed, 12 iron core splicing blocks are spliced into a whole circle after winding is completed, and the 12 wire heads are hung into the first connecting structure 1204 in a mode of welding in a mode of forming a corner joint in a mode of hanging the three-phase wiring board 100 and the stator into an integrated module structure after the wire heads are wound in pairs.

The present embodiment also provides a motor including a stator module or a three-phase wiring board 100, and the second connection structure 1205 of the three-phase wiring board 100 is connected to a control circuit of the motor.

The motor casing of the motor is internally provided with 3 positioning bosses corresponding to the positions of the three positioning holes 115 of the three-phase wiring board 100, and the positioning bosses can be connected with the positioning holes 115 so as to position the three-phase wiring board 100; the motor further comprises a circuit board, wherein 3 hole sites connected with the second connecting structures 1205 are arranged on the circuit board, and after the three-phase wiring board is connected with the stator to form a stator module, 3 second connecting structures 1205 are formed to extend out of the outer end face 112; the stator module is inserted into the hole site of the circuit board through 3 second connection structures 1205 and is welded and connected, thereby connecting and conducting the circuit board with the three-phase wiring board 100.

In order to facilitate connection of the second connection structure 1205 with the circuit board, the second connection structure 1205 is encapsulated, and after the hole sites of the circuit board are connected, the tail end of the second connection structure 1205 protrudes out of the circuit board, so that the second connection structure is completely connected with the circuit board by soldering tin.

In addition, in order to better connect the three-phase wiring board 100 with the inner wall of the motor case, the outer diameter and the inner diameter of the injection molding board 110 are designed to be matched with the outer diameter and the inner diameter of the stator so as to connect the injection molding board 110 along the inner wall of the stator installation cavity; meanwhile, in order to facilitate wiring and avoid high temperature melting Bao Jiaoceng during electric welding, the connection part of the first connection structure 1204 is designed to be at a distance of about 2mm from the injection molding plate 110; and for better fixed three-phase wiring board 100, be provided with the location step of being connected with the board 110 adaptation of moulding plastics in the inside of motor casing, the height of location step is more than 2mm, namely guarantees to mould plastics the distance between the top in board 110 and the motor casing and be more than 2mm to guarantee creepage distance and electric gap.

The motor provided by the invention has the advantages that the three-phase wiring board (or the stator module using the same) is used, the overall size is smaller, the structure is more compact, and the fixing effect of the three-phase wiring board is better.

The present embodiment also provides a center motor, which includes a stator module or a three-phase wiring board 100, and the second connection structure 1205 of the three-phase wiring board 100 is connected with a control circuit of the center motor.

The motor shell of the middle motor is internally provided with 3 positioning bosses corresponding to the positions of the three positioning holes 115 of the three-phase wiring board 100, and the positioning bosses can be connected with the positioning holes 115 so as to position the three-phase wiring board 100; the motor further comprises a circuit board, wherein 3 hole sites connected with the second connecting structures 1205 are arranged on the circuit board, and after the three-phase wiring board is connected with the stator to form a stator module, 3 second connecting structures 1205 are formed to extend out of the outer end face 112; the stator module is inserted into the hole site of the circuit board through 3 second connection structures 1205 and welded to connect and conduct between the circuit board and the three-phase wiring board you 100.

In order to facilitate connection of the second connection structure 1205 with the circuit board, the second connection structure 1205 is encapsulated, and after the hole sites of the circuit board are connected, the tail end of the second connection structure 1205 protrudes out of the circuit board, so that the second connection structure is completely connected with the circuit board by soldering tin.

In addition, in order to better connect the three-phase wiring board 100 with the inner wall of the motor case, the outer diameter and the inner diameter of the injection molding board 110 are designed to be matched with the outer diameter and the inner diameter of the stator so as to connect the injection molding board 110 along the inner wall of the stator installation cavity; meanwhile, in order to facilitate wiring and avoid high temperature melting Bao Jiaoceng during electric welding, the connection part of the first connection structure 1204 is designed to be at a distance of about 2mm from the injection molding plate 110; and for better fixed three-phase wiring board 100, be provided with the location step of being connected with the board 110 adaptation of moulding plastics in the inside of motor casing, the height of location step is more than 2mm, namely guarantees to mould plastics the distance between the top in board 110 and the motor casing and be more than 2mm to guarantee creepage distance and electric gap.

The centrally-mounted motor provided by the invention has the advantages that the three-phase wiring board or the stator module using the three-phase wiring board is smaller in overall size, more compact in structure and better in fixing effect of the three-phase wiring board.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (10)

1. A three-phase wiring board (100), characterized by comprising an injection molding board (110) and three power connection pieces (120), wherein the injection molding board (110) is made of insulating materials and is ring-shaped, the injection molding board (110) comprises an inner end surface (111) facing one side of a stator and an outer end surface (112) facing the outer side, wherein the main bodies of the three power connection pieces (120) are respectively arc-shaped arranged around the center of the injection molding board (110), each power connection piece (120) is positioned between an inner ring (119) and an outer ring (118) of the injection molding board (110), the main body of the power connection piece (120) is Z-shaped in a Zhou Xiangzong section of the injection molding board (110), the injection molding board comprises a first part (1201), a second part (1202) and a third part (1203) connecting the first part (1201) and the second part (1202), the first part (1201) is close to or positioned on the outer end surface (112), and the second part (1202) is close to or positioned on the inner end surface (111), wherein the first part of any power connection piece (120) is projected onto the second part (1201) adjacent to the first part (1201) in the axial direction;

at least one first connection structure (1204) is provided on the outer side of the first portion (1201) and the second portion (1202) of each tab (120) for connection with a stator coil.

2. The three-phase terminal block of claim 1, wherein,

the three power connection pieces (120) are integrally connected to the injection molding plate (110) in an injection molding mode;

or after the injection molding plate (110) is formed by the inner end surface part and the outer end surface part respectively, the two parts are butted with the three electric connection sheets (120) from the two side end surfaces to the middle, and the two parts are butted to form the injection molding plate (110) while the electric connection sheets (120) are fixed.

Preferably, in the same patch (120), the arc length of the first portion (1201) is greater than the arc length of the second portion (1202).

Preferably, the arc length of the first portion (1201) is between 1/4 circumference and 1/3 circumference and the arc length of the second portion (1202) is between 1/8 circumference and 1/4 circumference.

Preferably, the first connection structure (1204) is located inside an outer ring (118) of the injection plate (110).

Preferably, the first connection structure (1204) is bent towards the outer end face (112) of the injection plate (110).

Preferably, the first connection structure (1204) comprises a V-shaped connection block.

Preferably, the two first connection structures (1204) on the same patch (120) span between 150-180 degrees on the circumference; a distance is maintained between the first connection structures (1204) of the different power pads (120).

Preferably, a wire slot (113) is formed on the outer edge of the injection molding board (110) corresponding to each first connection structure (1204), or a wire hole penetrating through two end surfaces of the injection molding board (110) is formed on the injection molding board (110).

Preferably, each of the power receiving pads (120) is further provided with a second connection structure (1205) for connecting with a terminal of an external circuit.

Preferably, the second connection structure (1205) is connected to an outer side or an inner side of the main body of the power receiving sheet (120).

Preferably, the first connection structure (1204), the second connection structure (1205) are located between an inner ring (119) and an outer ring (118) of the injection plate (110).

Preferably, the second connection structure (1205) is perpendicular to the outer end surface (112) of the injection plate (110).

Preferably, the second connection structure (1205) is a tab, and four sides of an end of the tab are chamfered.

Preferably, the power receiving sheet (120) includes a first power receiving sheet (121), a second power receiving sheet (122), and a third power receiving sheet (123), wherein:

the second connection structure (1205) of the first power receiving piece (121) is located at the end of the first part (1201) far away from the third part (1203);

the second connection structure (1205) of the second power receiving piece (122) is located on the first part (1201) of the second connection structure near the third part (1203);

the second connection structure (1205) of the third power receiving piece (123) is located at an end of the second portion (1202) thereof, which is far from the third portion (1203).

Preferably, the second connection structures (1205) of the three power receiving pads are arranged at the same angle with respect to each other.

Preferably, the second connection structure (1205) of the first power receiving sheet (121) is connected to the outer side edge of the first power receiving sheet (121);

the second connecting structure (1205) of the second electric connection piece (122) is connected to the outer side edge of the second electric connection piece (122);

the second connecting structure (1205) of the third power receiving sheet (123) is connected to the outer side edge of the third power receiving sheet (123);

and the second connection structures of the three power connection pieces are positioned on the same plane.

3. The three-phase terminal block of claim 1, wherein,

positioning holes (115) are further formed in the injection molding plate (110), and the positioning holes (115) penetrate through the two side surfaces of the injection molding plate (110); the number of the positioning holes (115) is 3, and the positioning holes are correspondingly positioned in the middle of each power receiving sheet (120).

Preferably, on the outer end surface (112) of the injection molding plate (110), a first supporting hole (116) is arranged in a region between the first parts (1201) of two adjacent electric connection sheets (120), the first supporting hole (116) is communicated with the second part (1202) of the corresponding electric connection sheet (120) on the inner end surface (111), and the first supporting hole (116) is a blind hole;

a second supporting hole (117) is formed in the inner end face (111) of the injection molding plate (110) in a region between the second parts (1202) of two adjacent electric connection sheets (120), and the second supporting hole (117) is communicated with the first part (1201) of the corresponding electric connection sheet (120) on the outer end face (112), so that the second supporting hole (117) is a blind hole.

4. A method of forming a three-phase wiring board according to any one of claims 1 to 3, comprising:

providing an injection mold (300);

providing a power connection piece (120);

placing the electric connection sheet (120) in an injection cavity of an injection mold according to the position relation of the molding of the wiring board and fixing the electric connection sheet;

and injecting an insulating material into the injection molding cavity, and cooling and molding.

5. An injection mold for a three-phase wiring board according to any one of claims 1 to 3, comprising:

the device comprises a base (310) and an upper gland (320), wherein a circular boss (311) is arranged at the center of the base (310), a circular groove (321) which is in butt joint with the boss (311) is arranged at the center of the upper gland (320), an annular step surface (322) which surrounds the groove (321) is arranged on the lower end surface of the upper gland (320), and an annular cavity is formed by the butt joint of the base (310) and the upper gland (320); the annular step surface (322) of the upper gland (320) is used for forming the inner end surface (111) of the injection molding plate (110), and the surface of the base (310) around the boss (311) is used for forming the outer end surface (112) of the injection molding plate (110).

6. The injection mold of claim 5, wherein the mold comprises a plurality of mold cavities,

a first accommodating part (312) for accommodating the first connecting structure (1204) and a second accommodating part (313) for accommodating the second connecting structure (1205) are arranged on the base (310).

Preferably, the device further comprises a sliding block structure (314) for being inserted into the first accommodating part (312) of the base (310) from the side of the base (310) so as to separate the parting plane of the base (310) from the first connecting structure (1204).

Preferably, the base (310) and the upper gland (320) are connected in a positioning manner through a plurality of positioning structures, and the positioning structures comprise a convex column (315) arranged on the base (310) and a concave hole (323) arranged on the upper gland (320).

Preferably, the base (310) is provided with a first support column (316) supported on the second portion (1202) to form a first support hole (116) after the injection molding plate (110) is molded.

Preferably, the first support column (316) is adjustably connected in the base (310).

Preferably, the base (310) is further provided with a positioning column (317), and the positioning column (317) is abutted against the annular step surface (322) so as to form a positioning hole (115) after the injection molding plate (110) is molded.

Preferably, a second support column (324) supported on the first portion (1201) is provided on the step surface of the upper gland (320) to form a second support hole (117) after the injection molding plate (110) is molded.

Preferably, the step surface edge of the upper gland (320) is further provided with a bump structure (325) so as to form the lead groove (113) after the injection molding plate (110) is molded.

Preferably, the step surface edge of the upper gland (320) is also provided with an arc-shaped block (326) so as to form an arc-shaped notch (114) after the injection molding plate (110) is molded.

7. A stator module comprising a stator and a three-phase terminal block (100) according to any one of claims 1-3, said three-phase terminal block (100) being connected to an end of said stator and being coaxially arranged, said stator comprising a stator core and a stator coil, wherein said stator coil is correspondingly connected to a first connection structure (1204) of said three-phase terminal block (100).

8. The stator module as claimed in claim 7, wherein,

the connection terminals of the stator coils with the same phase are closely connected in groups according to the distance from the first connection structure (1204), pass through the lead slots (113) or the lead holes, and are connected with the first connection structure (1204).

9. An electric machine comprising a stator module as claimed in claim 8 or a three-phase terminal block (100) as claimed in any one of claims 1 to 3, the second connection structure (1205) of the three-phase terminal block (100) being connected to a control circuit of the electric machine.

10. A mid-motor comprising the stator module of claim 8 or the three-phase terminal block (100) of any one of claims 1-3, the second connection structure (1205) of the three-phase terminal block (100) being connected to a control circuit of the mid-motor.