Insulating part, assembly structure of insulating part and stator core block, and motor splicing type stator assembly

Abstract

The invention discloses an insulating part, an assembling structure of the insulating part and a stator core block and a motor splicing type stator assembly. The insulating part comprises a flat bottom surface, a flat top surface, a left side vertical surface, a right side vertical surface, a left front wing surface, a right front wing surface, a left rear wing surface and a right rear wing surface, the flat bottom surface is in transition connection with the left side vertical surface and the right side vertical surface, and the flat top surface is turned inwards from the top of the left side vertical surface and the top of the right side vertical surface and is connected with the left side vertical surface and the right side vertical surface to define a cavity with a cuboid structure; the two sides of the front end of the cavity are in transition connection with a left front wing surface and a right front wing surface, the two sides of the rear end of the cavity are in transition connection with a left rear wing surface and a right rear wing surface, the left front wing surface and the left rear wing surface deviate from the left side vertical surface and extend outwards, and the right front wing surface and the right rear wing surface deviate from the right side vertical surface and extend outwards; and the left front wing surface, the left rear wing surface, the right front wing surface and the right rear wing surface respectively extend up and down along the height of the cavity. The all-directional insulation box is formed by cutting and folding the rectangular insulation thin paper, the occupied space is small, the cost is saved, and all-directional insulation is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of motors, and in particular to an insulating part and an assembly structure thereof with a stator core block and a motor spliced ​​stator assembly. Background Art

[0002] The insulating parts are usually injection molded parts, which are assembled together with the stator core block of the motor. In order to achieve bonding and curing, the injection molded insulating parts must have a certain wall thickness, which is generally between 0.8 and 1.0 mm. Not only is the raw material cost high, but it also occupies too much slot area, reducing the effective use of the slot area by the winding, thus forcing the motor volume design to increase, which is not conducive to improving the power density of the motor. In addition, the production of injection molded parts will inevitably generate emissions, thus polluting the environment and consuming energy.

[0003] Conventional injection molded insulating parts are mainly composed of slot insulators and end insulators, and are split assembly structures. In detail, the two end insulators are respectively fixed at the axial ends of the stator core blocks, and the slot insulators are inserted into the slot side walls between adjacent stator core blocks. The injection molded insulating parts need to be assembled three times, which restricts production efficiency and increases the proportion of assembly costs. Summary of the invention

[0004] In view of the above-mentioned deficiencies of the prior art, an object of the present invention is to provide an insulating member and an assembly structure with a stator core block and a motor spliced ​​stator assembly to overcome the drawbacks of the prior art.

[0005] To this end, according to one aspect of the present invention, an insulating member is provided, which is used for the insulation of the stator core block of the motor, comprising a flat bottom surface and a flat top surface, a left vertical surface and a right vertical surface, a left front wing surface and a right front wing surface, and a left rear wing surface and a right rear wing surface, respectively, which are symmetrically arranged, wherein the flat bottom surface is transitionally connected with the left vertical surface and the right vertical surface respectively, and the flat top surface is formed by the top of the left vertical surface and the right vertical surface turning inward to form a left flange and a right flange and connected to each other, so that the flat bottom surface and the left vertical surface , the flat top surface and the right vertical surface form a hollow cavity of a rectangular structure for accommodating the winding teeth; the left front wing surface and the right front wing surface are respectively transitionally connected to the front end side of the hollow cavity body, the left rear wing surface and the right rear wing surface are respectively transitionally connected to the rear end side of the hollow cavity body, the left front wing surface and the left rear wing surface are respectively turned away from the left vertical surface and extend outward, the right front wing surface and the right rear wing surface are respectively turned away from the right vertical surface and extend outward; the left front wing surface, the left rear wing surface, the right front wing surface and the right rear wing surface are respectively extended up and down along the height of the hollow cavity body.

[0006] The above-mentioned insulating member is formed by cutting and folding a single rectangular insulating thin paper, wherein the left short side is provided with a left punching position and another left punching position in the shape of "-", the right short side is provided with a right punching position and another right punching position in the shape of "-", the front long side is provided with a "⊥"-shaped front punching opening along the short symmetry axis, and the rear long side is provided with a "⊥"-shaped front punching opening along the short symmetry axis. A rear punching opening of a shape, a left punching opening, a front punching opening and a right punching opening form a front collinear line and are equidistant from the front long side, another left punching opening, a rear punching opening and another right punching opening form a rear collinear line and are equidistant from the rear long side; the left ends of the front punching opening and the rear punching opening are bent inwardly with the right ends of the front punching opening and the rear punching opening to form the flat bottom surface, the edges are folded outwardly along the front collinear line and the rear collinear line and erected inwardly to form the left vertical surface, the left front wing surface, the left rear wing surface and the right vertical surface, the right front wing surface and the right rear wing surface, a left punching opening and another left punching opening opened on the left short side are folded inwardly together to form the left flange, and a right punching opening and another right punching opening opened on the right short side are folded inwardly together to form the right flange.

[0007] As a priority, the length of the left front wing extending outward and the length of the right front wing extending outward are both greater than the length of the left rear wing extending outward and the length of the right rear wing extending outward, and the distance from the front collinearity to the front long side formed by a left punching point, a front punching opening and a right punching point is greater than the distance from the rear collinearity to the rear long side formed by another left punching point, a rear punching opening and another right punching point.

[0008] Preferably, the insulating thin paper is a polyester film sheet with a thickness of 0.15 to 0.5 mm.

[0009] Furthermore, the present invention provides an assembly structure of an insulating member and a stator core block, wherein the insulating member is the insulating member described above, and the stator core block is composed of a circumferentially arranged yoke, a pole shoe, and a winding tooth integrally connected to the yoke and the pole shoe, the yoke is arranged at the outer ends of both sides of the winding tooth and the pole shoe is arranged at the inner ends of both sides of the winding tooth, the yoke has a symmetrically arranged left inner wall and a right inner wall facing the stator shaft hole, the pole shoe has a symmetrically arranged left outer wall and a right outer wall facing away from the stator shaft hole, the winding tooth has a tooth bottom surface, a tooth top surface, a tooth left side surface and a tooth right side surface, and the stator The sub-iron core block is placed in the insulating part with the tooth bottom surface facing the flat bottom surface, the winding teeth are accommodated in the cavity, the flat bottom surface, the left vertical surface and the right vertical surface are respectively attached to the tooth bottom surface, the tooth left side surface and the tooth right side surface, the left front wing surface is attached to the left inner wall of the yoke and the right front wing surface is attached to the right inner wall of the yoke and both extend out of the axial end surface of the yoke, the left rear wing surface is attached to the left outer wall of the pole shoe and the right rear wing surface is attached to the right outer wall of the pole shoe and both extend out of the axial end surface of the pole shoe, the left flange and the right flange are respectively attached to the tooth top surface and are fixedly connected to cover the tooth top surface.

[0010] Furthermore, the present invention also provides a motor spliced ​​stator assembly, including a coil and an assembly structure of the aforementioned insulating parts and stator core blocks, wherein a plurality of adjacent stator core blocks are spliced ​​together to form a whole circle, wherein each coil is wound around the flat bottom surface, left vertical surface, flat top surface and right vertical surface of the corresponding insulating part, and the ends of the coil are isolated and insulated by the left front wing surface and the right front wing surface extending out of the stator yoke, and by the left rear wing surface and the right rear wing surface extending out of the stator pole shoe.

[0011] The present invention has the following advantages and positive effects:

[0012] After the insulating member adopts insulating thin paper, for the stator core blocks of the same volume and adjacent splicing, compared with the insulation structure of the injection molding method, on the one hand, the insulating member of the present invention installed on the stator core block can not only greatly reduce the occupation of the slot space, but the improved space utilization rate means that more turns of coils can be wound under the same stator slot area, which is beneficial to improving the power density of the motor, and is also beneficial to the better heat dissipation of the winding because the coil is closer to the stator core block, and the production of injection molding insulating parts that will cause environmental pollution and emissions is abandoned, solving the problem of environmental protection and energy saving. On the other hand, because the insulating member is a thin-walled member, it can save more insulating material consumables than conventional injection molding insulating members, and the material cost is lower.

[0013] The innovation lies in that the insulating part of the present invention is made of a single, rectangular insulating thin paper that is cut and folded, and it can be assembled with the stator core block into an integrated structure at one time. The advantage is that the insulating part with a hollow cavity not only insulates the coil from the four surfaces of the winding teeth and the inner wall of the yoke and the outer wall of the pole shoe of the stator core block, but also the front wing surface part of the insulating part extending out of the axial end face of the yoke and the rear wing surface part of the insulating part extending out of the axial end face of the pole shoe respectively provide effective isolation and insulation for the coil ends protruding from the axial end face of the stator core block. The protruding part of the insulating part can replace the traditional part, namely the end insulation injection molded frame, and overcome its excessive wall thickness. In short, the single part and the stator core block form two insulating structures, thereby solving the all-round insulation problem of the wound coil and the stator core block. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a plan view of the insulating member of the present invention flattened into insulating paper;

[0015] Figure 2 It is a schematic diagram of a state where the flat top surface in the insulating member is disconnected and opened to the left and right;

[0016] Figure 3 is a three-dimensional diagram of an insulating member;

[0017] Figure 4 It is a schematic diagram of the assembly structure of the insulating member and the stator core block of the present invention;

[0018] Figure 5 It is a three-dimensional diagram of the stator core block;

[0019] Figure 6 It is the end view of the stator core block;

[0020] Figure 7 It is a stereoscopic diagram of the spliced ​​stator assembly of the motor of the present invention. DETAILED DESCRIPTION

[0021] See also Figures 1 to 7 As shown, it is used for the insulation of the stator core block 2 of the motor, including a symmetrically arranged flat bottom surface 11 and a flat top surface 13, a symmetrically arranged left vertical surface 12L and a symmetrically arranged right vertical surface 12R, a symmetrically arranged left front wing surface 15L and a symmetrically arranged right front wing surface 15R, and a symmetrically arranged left rear wing surface 16L and a right rear wing surface 16R.

[0022] The flat bottom surface is transitionally connected with the left vertical surface and the right vertical surface respectively, and the flat top surface 13 is formed by the top of the left vertical surface 12L and the top of the right vertical surface 12R being turned inward to form a left flange 13L and a right flange 13R and connected to each other, so that the flat bottom surface 11, the left vertical surface 12L, the flat top surface 13 and the right vertical surface 12R form a hollow cavity 14 of a rectangular structure for accommodating the winding teeth 20.

[0023] The left front wing surface 15L is transitionally connected to the left side of the front end of the cavity body 14, and the right front wing surface 15R is transitionally connected to the right side of the front end of the cavity body 14, the left rear wing surface 16L is transitionally connected to the left side of the rear end of the cavity body 14, and the right rear wing surface 16R is transitionally connected to the right side of the rear end of the cavity body 14, and the left front wing surface 15L and the left rear wing surface 16L respectively turn away from the left vertical surface 12L and extend outward, and the right front wing surface 15R and the right rear wing surface 16R respectively turn away from the right vertical surface 12R and extend outward.

[0024] The left front wing surface 15L, the left rear wing surface 16L, the right front wing surface 15R and the right rear wing surface 16R extend up and down along the height of the cavity 14 and are all located outside the cavity 14, that is, they are all located outside the upper dead point and the lower dead point of the cavity 14 (see the height of the cavity 14 for details). Figure 3 H direction indicated in the figure).

[0025] See also Figure 1 , 2 As shown in FIG. 3 , the insulating member is formed by cutting and folding a single rectangular insulating thin paper 1 and has a front long side 1F, a rear long side 1P, a left short side 1L and a right short side 1R.

[0026] The left short side 1L has a "-" shaped left punching position 1L-1 and another left punching position 1L-2, the right short side 1R has a "-" shaped right punching position 1R-1 and another right punching position 1R-2, the front long side 1F has a "⊥" shaped front punching opening 1F' along the short symmetry axis, and the rear long side 1P has a "-" shaped front punching opening 1F' along the short symmetry axis. The rear punching opening 1P' of the shape, a left punching position 1L-1, a front punching position 1F' and a right punching position 1R-1 form a front collinear line and are equidistant from the front long side 1F, another left punching position 1L-2, the rear punching opening 1P' and another right punching position 1R-2 form a rear collinear line and are equidistant from the rear long side 1P.

[0027] The short symmetry axis refers to the straight line through the intersection of the diagonals of the rectangular insulating paper and parallel to the left and right short sides.

[0028] The left ends of the front punching opening 1F' and the rear punching opening 1P' and the right ends of the front punching opening 1F' and the rear punching opening 1P' are bent inwardly to form the flat bottom surface 11, and the edges are folded outwardly along the front collinear line and the rear collinear line and erected inwardly to form the left vertical surface 12L, the left front wing surface 15L, the left rear wing surface 16L and the right vertical surface 12R, the right front wing surface 15R, and the right rear wing surface 16R. A left punching position 1L-1 and another left punching position 1L-2 opened on the left short side are folded inwardly together to form the left flange 13L, and a right punching position 1R-1 and another right punching position 1R-2 opened on the right short side are folded inwardly together to form the right flange 13R.

[0029] Please read Figure 2 , 3 As shown, the length of the left front wing surface 15L extending outward and the length of the right front wing surface 15R extending outward are both greater than the length of the left rear wing surface 16L extending outward and the length of the right rear wing surface 16R extending outward, and the distance from the front collinear line to the front long side 1F formed by a left punching 1L-1, a front punching opening 1F' and a right punching 1R-1 is greater than the distance from the rear collinear line to the rear long side 1P formed by another left punching 1L-2, a rear punching opening 1P' and another right punching 1R-2, see Figure 1 shown.

[0030] The insulating paper 1 is a polyester film sheet with a thickness between 0.15 and 0.5 mm, wherein the preferred thickness is 0.25 mm.

[0031] If the preferred thickness of the polyester film sheet is 0.25 mm, compared with the traditional injection-molded insulating parts with the same wall thickness, the wall thickness of the insulating part is reduced by 31.25% to 25%, and the insulating consumables are significantly saved.

[0032] See also Figure 4The present invention provides an assembly structure of an insulating member and a stator core block, wherein the insulating member is the insulating member described above, and the stator core block 2 is composed of a circumferentially arranged yoke 21, a circumferentially arranged pole shoe 22, and a winding tooth 20 integrally connected with the yoke and the pole shoe, wherein the yoke 21 is arranged at the outer ends of both sides of the winding tooth 20 and the pole shoe 22 is arranged at the inner ends of both sides of the winding tooth 20 and the three extend axially in an integral manner, the yoke 21 has a symmetrically arranged left inner wall 21L and a right inner wall 21R facing the stator shaft hole, the pole shoe 22 has a symmetrically arranged left outer wall 22L and a right outer wall 22R facing away from the stator shaft hole, the winding tooth 20 has a tooth bottom surface (not visible and not marked), a tooth top surface 203, a tooth left side surface 202L and a tooth right side surface 202R, and the stator core block 2 has its tooth bottom surface facing the flat bottom surface 1 1 is placed in the insulating member, the winding tooth 20 is accommodated in the cavity 14, the flat bottom surface 11, the left vertical surface 12L and the right vertical surface 12R are respectively attached to the tooth bottom surface, the tooth left side surface 202L and the tooth right side surface 202R, the left front wing surface 15L is attached to the left inner wall 21L of the yoke, and the right front wing surface 15R is attached to the right inner wall 21R of the yoke, and the left front wing surface 15L and the right front wing surface 15R are both extended out of the axial end surface of the yoke 21, the left rear wing surface 16L is attached to the left outer wall 22L of the pole shoe, and the right rear wing surface 16R is attached to the right outer wall 22R of the pole shoe, and the left rear wing surface 16L and the right rear wing surface 16R are both extended out of the axial end surface of the pole shoe 22, the left flange 13L and the right flange 13R are respectively attached to the tooth top surface 203 and are fixedly connected to cover and fit the tooth top surface, combined with Figure 5 , 6 shown.

[0033] One of the left flange and the right flange is overlapped on the other and fixed, and the overlap connection structure has high strength and good reliability. The connection method of the left flange and the right flange is not limited, as long as they are fixedly connected to form a flat top surface.

[0034] See also Figure 7 The present invention provides a motor spliced ​​stator assembly, including a coil (conventional parts are not shown), the aforementioned insulating parts and an assembly structure of stator core blocks, wherein a plurality of adjacent stator core blocks 2 are spliced ​​together to form a full circle, wherein each coil is wound around the flat bottom surface, the left vertical surface 12L, the flat top surface 13 and the right vertical surface 12R of the corresponding insulating part, and the ends of the coil are isolated and insulated by the left front wing surface 15L and the right front wing surface 15R extending out of the stator yoke 21' and by the left rear wing surface 16L and the right rear wing surface 16R extending out of the stator pole shoe 22'.

[0035] The outer walls of the stator core blocks adjacent to each other in two or more directions are fixed by welding or sleeves at the joints, and only a fixed connection is required.

Claims

1. An insulating member used for insulating a stator core block of a motor, characterized in that: It includes a flat bottom surface and a flat top surface, a left vertical surface and a right vertical surface, a left front wing surface and a right front wing surface, a left rear wing surface and a right rear wing surface, which are symmetrically arranged. The flat bottom surface is transitionally connected with the left vertical surface and the right vertical surface respectively, and the flat top surface is formed by turning the tops of the left vertical surface and the right vertical surface inwardly to form a left turn and a right turn and connected to each other, so that the flat bottom surface, the left vertical surface, the flat top surface and the right vertical surface surround a hollow body of a rectangular parallelepiped structure for accommodating the winding teeth; The left front wing surface and the right front wing surface are respectively transitionally connected to the front end side of the cavity body, the left rear wing surface and the right rear wing surface are respectively transitionally connected to the rear end side of the cavity body, the left front wing surface and the left rear wing surface are respectively turned away from the left vertical surface and extend outward, and the right front wing surface and the right rear wing surface are respectively turned away from the right vertical surface and extend outward; The left front wing surface, the left rear wing surface, the right front wing surface and the right rear wing surface respectively extend up and down along the height of the cavity body.

2. The insulating member according to claim 1, characterized in that: The insulating member is formed by cutting and folding a single rectangular insulating thin paper, wherein: The left short side has a "-" shaped left punching position and another left punching position, the right short side has a "-" shaped right punching position and another right punching position, the front long side has a "⊥" shaped front punching position along the short symmetry axis, and the rear long side has a "-" shaped front punching position along the short symmetry axis. A rear blanking notch of a shape, a left blanking position, a front blanking notch and a right blanking position form a front collinear line and have equal spacing to the front long side, another left blanking position, a rear blanking notch and another right blanking position form a rear collinear line and have equal spacing to the rear long side; The left ends of the front punching opening and the rear punching opening and the right ends of the front punching opening and the rear punching opening are bent inwardly to form the flat bottom surface, and the edges are folded outwardly along the front collinear line and the rear collinear line and erected inwardly to form the left vertical surface, the left front wing surface, the left rear wing surface and the right vertical surface, the right front wing surface, and the right rear wing surface. A left punching position and another left punching position opened on the left short side are folded inwardly together to form the left flange, and a right punching position and another right punching position opened on the right short side are folded inwardly together to form the right flange.

3. The insulating member according to claim 2, characterized in that: The lengths of the left front wing surface extending outward and the right front wing surface extending outward are both greater than the lengths of the left rear wing surface extending outward and the right rear wing surface extending outward, and the distance from the front collinearity to the front long side formed by a left punching place, a front punching opening and a right punching place is greater than the distance from the rear collinearity to the rear long side formed by another left punching place, a rear punching opening and another right punching place.

4. The insulating member according to claim 3, characterized in that: The insulating paper is a polyester film sheet with a thickness between 0.15 and 0.5 mm.

5. An assembly structure of an insulator and a stator core block, wherein the insulator is the insulator as claimed in claim 1 or 2 or 3 or 4, the stator core block is composed of a circumferentially arranged yoke, a pole shoe and a winding tooth integrally connected to the yoke and the pole shoe, the yoke is arranged at the outer ends of both sides of the winding tooth and the pole shoe is arranged at the inner ends of both sides of the winding tooth, the yoke has a symmetrically arranged left inner wall and right inner wall facing the stator shaft hole, the pole shoe has a symmetrically arranged left outer wall and right outer wall away from the stator shaft hole, the winding tooth has a tooth bottom surface, a tooth top surface, a tooth left side surface and a tooth right side surface, characterized in that: The core block is placed in the insulating part with its tooth bottom surface facing the flat bottom surface, the winding teeth are accommodated in the cavity, the flat bottom surface, the left vertical surface and the right vertical surface are respectively attached to the tooth bottom surface, the tooth left side surface and the tooth right side surface, the left front wing surface is attached to the left inner wall of the yoke and the right front wing surface is attached to the right inner wall of the yoke and both extend out of the axial end surface of the yoke, the left rear wing surface is attached to the left outer wall of the pole shoe and the right rear wing surface is attached to the right outer wall of the pole shoe and both extend out of the axial end surface of the pole shoe, the left flange and the right flange are respectively attached to the tooth top surface and are fixedly connected to cover the tooth top surface.

6. A motor spliced ​​stator assembly, comprising a coil, characterized in that: It also includes the assembly structure of the insulating part and the stator core block as described in claim 5, wherein a plurality of adjacent stator core blocks are spliced ​​together to form a whole circle, wherein each coil is wound around the flat bottom surface, the left vertical surface, the flat top surface and the right vertical surface of the corresponding insulating part, and the ends of the coil are isolated and insulated by the left front wing surface and the right front wing surface extending out of the stator yoke and by the left rear wing surface and the right rear wing surface extending out of the stator pole shoe.

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