Stator structure capable of enhancing insulating property

Abstract

The utility model relates to the technical field of motor stator insulation, in particular to a stator structure capable of enhancing insulation performance, which comprises a stator core, a front framework and a rear framework which are respectively arranged at two ends of the stator core, and a first convex piece and a first groove which are respectively arranged on opposite sides of the front framework and the rear framework. The front framework and the rear framework are oppositely inserted through the matching of the first convex piece and the first groove, so that the gap between the front framework and the rear framework is reduced, even the gap at the matching part is eliminated, the potential safety hazard caused by the gap is completely eradicated, the problem that the high-voltage motor is easy to break down is solved, and the insulativity and the safety of the motor are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motor stator insulation, in particular to a stator structure with enhanced insulation performance. Background Art

[0002] During the production and assembly of the stator core of the motor, an insulating frame needs to be placed on each end of the stator core, and the two insulating frames are inserted into each other. Since the stator core has a tolerance of about 0.5mm, the length of the stator core will have a certain length. The stator core is made of silicon steel sheets stacked together by progressive dies, so that there is a certain tolerance in thickness. In addition, when designing the stator core, in order to ensure that the insulating frame can be inserted when the stator core is running and does not affect the winding, a gap of 0.2mm~0.3mm is generally left. Coupled with the tolerance of the stator core, this gap will reach 0.3~0.8mm. The existence of this gap makes it easy to break through during the high-voltage test. Summary of the invention

[0003] In view of this, the purpose of the utility model is to provide a stator structure with enhanced insulation performance to solve the problem of easy breakdown of the stator core.

[0004] Based on the above-mentioned purpose, the utility model provides a stator structure with enhanced insulation performance, including a stator core, wherein a front frame and a rear frame are respectively arranged at both ends of the stator core, and a first protrusion and a first groove are respectively arranged on the sides where the front frame and the rear frame are arranged facing each other, and the front frame and the rear frame are plugged into each other by cooperating with the first protrusion and the first groove.

[0005] Optionally, when the first protrusion is inserted into the first groove, the distance between the top of the first protrusion and the bottom of the first groove is D1=0.3 mm, and the distance between the bottom of the first protrusion and the opening of the first groove is D2=0.3 mm.

[0006] Optionally, the size of the top of the first protrusion is smaller than the size of the opening of the first groove.

[0007] Optionally, the two side walls of the first protrusion are symmetrically inclined, and the angle between the two side walls of the first protrusion is α=6°.

[0008] Optionally, when the first protrusion is inserted into the first groove, the vertical distance between the overlapping point of the outer wall of the first protrusion and the inner wall of the first groove and the bottom of the first protrusion is D3=1.6mm, and the shortest horizontal distance between the overlapping point of the outer wall of the first protrusion and the inner wall of the first groove and the end of the opening of the first groove is D4=0.09mm.

[0009] Optionally, the front frame and the rear frame are provided with a plurality of storage boxes with open ends at equal angles, the inner side walls of the front frame and the rear frame are provided with a plurality of slots connected one by one with the storage boxes, and two horns are provided on the side walls of the storage box near one end of the slot, and the two horns are symmetrically arranged about the slot.

[0010] Optionally, an insulating plate is provided on a side of the rear frame away from the front frame.

[0011] Optionally, the insulating plate includes an arc-shaped plate, the inner side wall of the arc-shaped plate is provided with vertical plates perpendicularly connected to the arc-shaped plate at equal intervals, the vertical plates extend toward the rear frame, the side walls of the vertical plates are provided with second protrusions, and the inner side wall of the rear frame is provided with second grooves that cooperate and engage with the second protrusions.

[0012] Optionally, a third protrusion is provided on the inner side wall of the outer wall plate of the rear frame, and an inner inclined guide surface is provided on the upper end of the third protrusion.

[0013] Optionally, a plurality of fourth protrusions are provided on a side surface of the insulating plate away from the rear frame, and a first lead-out channel is provided between the fourth protrusions and the outer side of the insulating plate.

[0014] Beneficial effects of the utility model: the utility model provides a stator structure with enhanced insulation performance. The matching arrangement of the first protrusion and the first groove reduces the gap between the front frame and the rear frame, and even eliminates the gap at the matching point, thereby eliminating the safety hazard caused by the gap, solving the problem of easy breakdown of high-voltage motors, and improving the insulation and safety of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the explosion structure of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the front frame of the utility model;

[0018] Figure 3 It is a side structural schematic diagram of the front frame of the utility model;

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the front frame of the utility model;

[0020] Figure 5 It is a structural schematic diagram of the rear frame of the utility model;

[0021] Figure 6 It is a schematic diagram of the partial structure of the connection between the front frame and the rear frame of the utility model;

[0022] Figure 7 It is a schematic diagram of the three-dimensional structure of the front frame of the utility model;

[0023] Figure 8 for Figure 7 The enlarged structural diagram at A in the middle;

[0024] Fig. 9 It is a structural schematic diagram of the edge plate of the utility model;

[0025] Fig.10 for Fig. 9 The enlarged structural diagram at B in the middle;

[0026] Fig.11 It is a side structural schematic diagram of the utility model.

[0027] In the figure: 1, front frame; 11, first protruding piece; 12, horn;

[0028] 2. Stator core;

[0029] 3. rear frame; 31. first groove; 32. second groove; 33. third protrusion;

[0030] 4. Insulating plate; 41. Second protrusion; 42. Fourth protrusion; 421. Fourth sub-protrusion; 43. Fifth protrusion;

[0031] 5. Lead wire; 51. Wire welding end. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0033] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0034] like Figures 1 to 11 As shown, a stator structure with enhanced insulation performance includes a stator core 2, wherein a front frame 1 and a rear frame 3 are respectively arranged at both ends of the stator core 2, and a first protrusion 11 and a first groove 31 are respectively arranged on the sides where the front frame 1 and the rear frame 3 are arranged facing each other, and the front frame 1 and the rear frame 3 are plugged into each other by the cooperation of the first protrusion 11 and the first groove 31.

[0035] The matching arrangement of the first protrusion 11 and the first groove 31 reduces the gap between the front frame 1 and the rear frame 3, and even eliminates the gap at the matching point, thereby eliminating the safety hazard caused by the gap, solving the problem of easy breakdown of high-voltage motors, improving the insulation and safety of the motor, improving the quality of the motor, and enhancing the value and competitiveness of the product.

[0036] When the first protrusion 11 is inserted into the first groove 31, the distance between the top of the first protrusion 11 and the bottom of the first groove 31 is D1=0.3mm, and the distance between the bottom of the first protrusion 11 and the opening of the first groove 31 is D2=0.3mm, so that the front frame 1 and the rear frame 3 will not be unable to wind due to the negative tolerance of the stator core 2.

[0037] The top size of the first protrusion 11 is smaller than the opening size of the first groove 31 , which serves as a guide to facilitate the insertion of the first protrusion 11 on the front frame 1 into the first groove 31 of the rear frame 3 .

[0038] The two side walls of the first protrusion 11 are symmetrically inclined, and the angle between the two side walls of the first protrusion 11 is α=6°. This angle is that the top size of the first protrusion 11 is smaller than the size of the opening of the first groove 31, which serves as a guide to facilitate the insertion of the front frame 1 into the rear frame 3, and secondly, there is no gap between the front frame 1 and the rear frame 3 after insertion to prevent high voltage from breaking through the gap.

[0039] When the first protrusion 11 is inserted into the first groove 31, the vertical distance between the overlapping point of the outer wall of the first protrusion 11 and the inner wall of the first groove 31 and the bottom of the first protrusion 11 is D3=1.6mm, and the shortest horizontal distance between the overlapping point of the outer wall of the first protrusion 11 and the inner wall of the first groove 31 and the end of the opening of the first groove 31 is D4=0.09mm. Even if the stator core 2 has a deviation of D3=1.1mm and D4=0.06mm, D4 is 0.06~0.09mm. Due to the toughness of the front frame 1 and the rear frame 3, the first groove 31 on the rear frame 3 can be just opened by the first protrusion 11 on the front frame 1, thereby eliminating the existence of the gap and enhancing the insulation performance.

[0040] The front frame 1 and the rear frame 3 are provided with a plurality of receiving boxes with open ends at equal angles, and the inner side walls of the front frame 1 and the rear frame 3 are provided with a plurality of slots connected to the receiving boxes one by one, and two horns 12 are provided on the side walls of the receiving boxes near one end of the slots, and the two horns 12 are symmetrically arranged about the slots, and the distance from the top of the horn 12 to the stator core 2 is D5=3.5mm, which is nearly 3 times the distance of 1.1mm between the inner side wall of the receiving box near one end of the slots and the stator core 2 on the front frame 1 or the rear frame 3 without the horn 12, and at the same time, all the enameled wires are blocked inside the horns 12, so as to avoid the enameled wires from rubbing against the nozzle during the winding process, increase the creepage distance and the protection of the enameled wires, and thus enhance the insulation performance.

[0041] An insulating plate 4 is provided on one side of the rear frame 3 away from the front frame 1. The insulating plate 4 changes the conventional scheme of welding the lead wire 5 with the enameled wire and then directly inserting it into the gap between the two enameled wires, separates the enameled wires, increases insulation and prevents breakdown.

[0042] The insulating plate 4 includes an arc-shaped plate, and vertical plates vertically connected to the arc-shaped plate are arranged at equal intervals on the inner side wall of the arc-shaped plate. The vertical plates extend toward the rear frame 3, and second protrusions 41 are arranged on the side walls of the vertical plates. The inner side wall of the rear frame 3 is provided with a second groove 32 that cooperates with the second protrusion 41 and is engaged with the second protrusion 41. The second groove 32 is arranged on the side wall of the groove to facilitate the engagement between the insulating plate 4 and the rear frame 3 and enhance the firmness of the structure.

[0043] A third protrusion 33 is provided on the inner side wall of the outer wall plate of the rear frame 3 , and an inner inclined guide surface is provided at the upper end of the third protrusion 33 . The provision of the third protrusion 33 further improves the clamping connection between the insulating plate 4 and the rear frame 3 .

[0044] A plurality of fourth protrusions 42 are provided on a side of the insulating plate 4 away from the rear frame 3, and a first lead wire guide channel is provided between the fourth protrusion 42 and the outer side of the insulating plate 4. When the insulating plate 4 is snapped onto the insulating plate 4, the first lead wire guide channel between the rear frame 3 and the fourth protrusion 42 facilitates the restriction and fixation of one of the plurality of lead wires 5.

[0045] A fourth sub-protrusion 421 is provided on one side of the fourth protrusion 42 close to the outer side of the insulating plate 4, and an outer inclined guide surface is provided on the fourth sub-protrusion 421. The fourth sub-protrusion 421 facilitates the lead-out wire 5 to be clamped in the first lead-out channel, so as to better fix the lead-out wire 5. The setting of the outer inclined guide surface facilitates the lead-out wire 5 to be clamped between the fourth sub-protrusion 421 and the end face of the insulating plate 4 under the guidance of the outer inclined guide surface and under the pressure of external pressure.

[0046] A fifth protrusion 43 is disposed on the other side of the fourth protrusion 42 , and a second lead wire lead-out channel is disposed between the fifth protrusion 43 and the fourth protrusion 42 for limiting and fixing the lead wire 5 .

[0047] like Fig.11 As shown, four lead wires 5 on the stator core 2 are symmetrically arranged in pairs, wherein two symmetrically arranged lead wires 5 are clamped on the insulating plate 4 through the first lead wire lead-out channel, and the wire welding ends 51 of the lead wires 5 are welded to the enameled wire, and the other two symmetrically arranged lead wires 5 are clamped on the insulating plate 4 through the second lead wire lead-out channel and the first lead wire lead-out channel in sequence. The utility model solves the problem of easy breakdown of high-voltage motors, improves the insulation and safety of the motors, improves the quality of the motors, and enhances the value and competitiveness of the products.

[0048] A person skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0049] The embodiments of the present invention are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A stator structure with enhanced insulation performance, comprising a stator core (2), It is characterized in that A front frame (1) and a rear frame (3) are respectively arranged at both ends of the stator core (2); a first protrusion (11) and a first groove (31) are respectively arranged on one side of the front frame (1) and the rear frame (3) facing each other; the front frame (1) and the rear frame (3) are plugged into each other by the cooperation of the first protrusion (11) and the first groove (31).

2. A stator structure with enhanced insulation performance according to claim 1, It is characterized in that When the first protrusion (11) and the first groove (31) are inserted into each other, the distance between the top of the first protrusion (11) and the bottom of the first groove (31) is D1=0.3 mm, and the distance between the bottom of the first protrusion (11) and the opening of the first groove (31) is D2=0.3 mm.

3. A stator structure with enhanced insulation performance according to claim 2, It is characterized in that The size of the top of the first protrusion (11) is smaller than the size of the opening of the first groove (31).

4. A stator structure with enhanced insulation performance according to claim 3, It is characterized in that The two side walls of the first protruding piece (11) are symmetrically inclined, and the angle between the two side walls of the first protruding piece (11) is α=6°.

5. A stator structure with enhanced insulation performance according to claim 4, It is characterized in that When the first protrusion (11) and the first groove (31) are inserted into each other, the vertical distance between the overlapping point of the outer wall of the first protrusion (11) and the inner wall of the first groove (31) and the bottom of the first protrusion (11) is D3=1.6mm, and the shortest horizontal distance between the overlapping point of the outer wall of the first protrusion (11) and the inner wall of the first groove (31) and the end of the opening of the first groove (31) is D4=0.09mm.

6. A stator structure with enhanced insulation performance according to claim 1, It is characterized in that The front frame (1) and the rear frame (3) are provided with a plurality of storage boxes with open ends at equal angles, the inner side walls of the front frame (1) and the rear frame (3) are provided with a plurality of slots connected one by one with the storage boxes, and two horns (12) are provided on the side walls of the storage box near one end of the slot, and the two horns (12) are symmetrically arranged with respect to the slot.

7. A stator structure with enhanced insulation performance according to claim 1, It is characterized in that An insulating plate (4) is provided on a side of the rear frame (3) away from the front frame (1).

8. A stator structure with enhanced insulation performance according to claim 7, It is characterized in that The insulating plate (4) comprises an arc-shaped plate, the inner side wall of the arc-shaped plate is provided with vertical plates vertically connected to the arc-shaped plate at equal intervals, the vertical plates extend toward the rear frame (3), the side wall of the vertical plates is provided with a second protrusion (41), and the inner side wall of the rear frame (3) is provided with a second groove (32) that cooperates and engages with the second protrusion (41).

9. A stator structure with enhanced insulation performance according to claim 7, It is characterized in that A third protrusion (33) is provided on the inner side wall of the outer wall plate of the rear frame (3), and an inner inclined guide surface is provided at the upper end of the third protrusion (33).

10. A stator structure with enhanced insulation performance according to claim 7, It is characterized in that A plurality of fourth protrusions (42) are provided on a side surface of the insulating plate (4) away from the rear frame (3), and a first lead-out channel is provided between the fourth protrusions (42) and the outer side of the insulating plate (4).

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