Fixing device for fixing alternating current motor leading-out copper bar and alternating current motor stator

Abstract

The utility model relates to the technical field of alternating current motor stators, and provides a fixing device for fixing an alternating current motor leading-out copper bar and an alternating current motor stator comprising the same. The fixing device for fixing the alternating current motor leading-out copper bar comprises a restraining assembly, an upper pressing plate, a lower pressing plate and a bolt, the restraining assembly is provided with a connecting hole capable of providing an axial moving space, and the upper pressing plate and the lower pressing plate are each provided with a hole with an axial adjusting space. When the fixing device is installed on a machine base, the restraining assembly, the upper pressing plate and the lower pressing plate can provide axial movement spaces for the bolts, so that the axial position of the restraining hole of the restraining assembly can be adaptively adjusted according to the actual axial position of the leading-out copper bar, and therefore the restraining assembly can be reliably clamped and fixed. Therefore, the leading-out copper bar is firmly limited in the constraint hole.

Description

TECHNICAL FIELD

[0001] The utility model relates to alternating current motor stator, especially be used for fixing the fixing device of alternating current motor outgoing copper row and contain its alternating current motor stator. BACKGROUND

[0002] The transition type three-phase alternating current motor stator is provided with an armature winding, and the alternating current motor can be used as a generator or a motor. Figure 1 and Figure 2 The alternating current motor stator 200 in the prior art includes a base 101, an iron core 107, an armature winding 102, an outgoing copper row 106 and a fixing device 20. The iron core 107 is arranged on the inner side of the base 101, and the iron core 107 has a winding slot. The armature winding 102 is arranged in the winding slot, and the two ends of the armature winding 102 protrude from the end of the iron core 107. One end of the armature winding 102 is electrically connected to the outside through the outgoing copper row 106. For an alternating current motor with large power, the armature winding 102 collects three-phase currents generated by each pole phase group through a plurality of whole circular bus rings 104 (for example, U, V, W and N phase bus rings) made of copper bus bars, and then the three-phase currents are led out to the outside of the base 101 through a hard copper row (i.e., the outgoing copper row 106) made of copper bus bars, as shown in Figure 1 The plurality of bus rings 104 are fixed by a bus ring fixing member 105 to form a whole. The base 101 of the alternating current motor stator 200 is provided with a wire outlet window 108, and the outgoing copper row 106 extends through the wire outlet window 108. The alternating current motor stator 200 further includes a clamping plate fixing seat 24 fixed to the base 101 and two insulating clamping plates 22 extending in the transverse direction and arranged in parallel. The two insulating clamping plates 22 are arranged on the two sides of the outgoing copper row 106, respectively. A bolt 25 extending in the axial direction of the motor stator extends through the two insulating clamping plates 22 and the clamping plate fixing seat 24, so that the two insulating clamping plates 22 form a whole and are fixed to the base 101 through the clamping plate fixing seat 24. The two insulating clamping plates 22 are used to limit the movement of the outgoing copper row 106, thereby facilitating the stability and firmness of subsequent electrical connection.

[0003] However, this structure has some problems in the motor assembly process. For example, the axial position of the outgoing copper row 106 usually deviates from the axial position of the constraint hole formed by the two insulating clamping plates 22, which causes the outgoing copper row 106 to be unable to align with the constraint hole formed by the two insulating clamping plates 22 during the assembly process. The main reasons for this situation are that the clamping plate fixing seat 24 is usually welded before the base 101 is finished, and the actual position deviates from the expected position. In addition, the iron core 107, the bus ring fixing member 105, the bus ring 104 and the outgoing copper row 106 all have size deviations in the manufacturing process. After the cumulative effect of these deviations, the axial position of the outgoing copper row 106 deviates from the expected position.

[0004] In actual production assembly process, in the case of two insulation clamping plates 22 formed by the constraint hole and the outgoing copper bar 106 are not accurately aligned in the axial direction, the outgoing copper bar 106 is often forced to be orthopedic, not only time-consuming and laborious, but also easy to cause quality problems. Utility model content

[0005] To solve the above technical problems, the utility model provides a kind of fixing device for fixing outgoing copper bar of alternating current motor, and the fixing device of alternating current motor stator comprising.

[0006] The first aspect of the present disclosure provides a kind of fixing device for fixing outgoing copper bar of alternating current motor, and the alternating current motor stator includes base, base is equipped with outgoing window, outgoing copper bar extends through outgoing window.The fixing device includes two installation platforms fixed to base, two installation platforms are located at the two ends of outgoing window respectively;Two parallelly arranged insulation clamping plates, the side adjacent to two insulation clamping plates is equipped with constraint slot, the constraint hole is enclosed by the corresponding constraint slot of two insulation clamping plates, and outgoing copper bar extends through constraint hole;Two upper pressing plates and two lower pressing plates, the hole with axial adjustment space is equipped with upper pressing plate and lower pressing plate, two upper pressing plates are respectively arranged at the top of the two ends of two insulation clamping plates, and two lower pressing plates are respectively arranged at the bottom of the two ends of two insulation clamping plates and are respectively located on one installation platform.Each upper pressing plate is connected to installation platform by one bolt respectively, so that two insulation clamping plates are clamped and fixed by upper pressing plate and lower pressing plate.

[0007] Specifically, the two ends of two insulation clamping plates are equipped with connecting slot, the connecting hole is enclosed by the corresponding connecting slot of two insulation clamping plates, the hole with axial adjustment space is arranged in the middle of upper pressing plate and lower pressing plate, and the bolt is sequentially extended through the hole with axial adjustment space of upper pressing plate, connecting hole and the hole with axial adjustment space of lower pressing plate and is connected to installation platform.More specifically, the hole with axial adjustment space is configured as a waist-shaped hole, and the connecting hole is configured as a U-shaped opening towards the outside.

[0008] Optionally, the side of upper pressing plate and lower pressing plate close to insulation clamping plate is equipped with wedge-shaped joint surface, and the two ends of insulation clamping plate are equipped with pressing plate joint surface matched with wedge-shaped joint surface, and the slope of wedge-shaped joint surface is consistent with the slope of pressing plate joint surface.Specifically, wedge-shaped joint surface is configured as V-shaped opening towards insulation clamping plate.More specifically, the upper surface of installation platform is configured as a plane, and the lower surface of lower pressing plate is configured as a plane suitable for combining with the upper surface of installation platform.Optionally, the upper surface of upper pressing plate is configured as a plane.

[0009] The second aspect of the present disclosure provides an alternating current motor stator, comprising a stator frame, a core, an armature winding, a lead-out copper bar and the fixing device provided by the first aspect of the present disclosure. The core is arranged inside the stator frame, and the core has winding slots. The armature winding is arranged in the winding slots, and the two ends of the armature winding protrude from the end of the core. One end of the armature winding is electrically connected to the lead-out copper bar. Specifically, the lead-out copper bar is configured as three, each insulation clamp plate is provided with three constraint slots arranged in a transverse direction, and two insulation clamp plates are enclosed to form three constraint holes. Specifically, the stator frame is configured as a cylinder, and the lower surface of the mounting table and the lower surface of the insulation clamp plate are configured as arc surfaces suitable for being attached to the outer surface of the stator frame.

[0010] The features and advantages of the present disclosure include:

[0011] The fixing device for fixing the lead-out copper bar of the alternating current motor provided by the present disclosure comprises a constraint assembly, an upper pressing plate, a lower pressing plate and a bolt. The constraint assembly is provided with a connecting hole which can provide an axial movement space. The upper pressing plate and the lower pressing plate are both provided with holes which have axial adjustment spaces. When the fixing device is installed to the stator frame, the constraint assembly, the upper pressing plate and the lower pressing plate can all provide an axial movement space for the bolt, so that the axial position of the constraint hole of the constraint assembly can be adaptively adjusted according to the actual axial position of the lead-out copper bar, thereby reliably clamping and fixing the constraint assembly, so that the lead-out copper bar is firmly defined in the constraint hole.

[0012] In addition, the upper pressing plate and the lower pressing plate are provided with wedge-shaped joint surfaces, and the constraint assembly is provided with pressing plate joint surfaces. The constraint assembly comprises two insulation clamp plates. During the fastening process, due to the cooperation of the wedge-shaped joint surfaces and the pressing plate joint surfaces, the upper and lower pressing plates can push the two insulation clamp plates to move towards the middle, so that the lead-out copper bar is in good contact with the two insulation clamp plates and is effectively fixed. In summary, after the two bolts are tightened, the insulation clamp plates are fixed at appropriate axial positions according to the position of the lead-out copper bar, and the lead-out copper bar is in good contact with the two insulation clamp plates and is effectively fixed. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can also be obtained by those skilled in the art without creative labor.

[0014] Figure 1 A schematic diagram of an alternating current motor stator in the prior art is shown;

[0015] Figure 2 A schematic diagram of a fixing device for fixing a lead-out copper bar of an alternating current motor and a stator frame in the prior art is shown;

[0016] Figure 3A schematic diagram of the fixing device and base for fixing the lead-out copper busbars of an AC motor disclosed herein is shown;

[0017] Figure 4 A schematic diagram of the base and mounting platform of this disclosure is shown;

[0018] Figure 5 A three-dimensional schematic diagram of the insulating plate of this disclosure is shown;

[0019] Figure 6 It shows Figure 5 Another three-dimensional schematic diagram of the insulating board;

[0020] Figure 7 A three-dimensional schematic diagram of the pressure plate of this disclosure is shown;

[0021] Figure 8 It shows Figure 7 Another three-dimensional schematic diagram of the pressure plate;

[0022] Figure 9 A side view of the fixing device of this disclosure is shown;

[0023] Figure 10 It shows Figure 9 A schematic diagram of the sectional view of AA after rotation.

[0024] Explanation of reference numerals in the attached figures:

[0025] 100 / 200 - AC motor stator;

[0026] 101-Frame, 102-Armature winding, 104-Bus ring, 105-Bus ring fixing component, 106-Lead-out copper busbar, 107-Iron core, 108-Outgoing window;

[0027] 10-Fixing device, 12-Insulating clamp, 13-Upper pressure plate, 14-Lower pressure plate, 15-Bolt, 16-Mounting platform, 111-Oval hole, 112-Wedge-shaped mating surface, 113-Screw hole, 114-Flat surface, 121-Constraint hole, 122-Connecting hole, 123-Constraint groove, 124-Connecting groove, 125-Pressure plate mating surface, 126-Base mating surface;

[0028] 20-Fixing device, 22-Insulating clamp, 24-Clamp fixing seat, 25-Bolt. Detailed Implementation

[0029] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this disclosure.

[0030] In describing this disclosure, "proximal end" refers to the end closest to the lead busbar of the AC motor stator, and "far end" refers to the end furthest from the lead busbar of the AC motor stator. When one or more components are described as being connected, linked, fixed, coupled, attached, or otherwise interconnected, such interconnection can be a direct interconnection between components or an indirect interconnection, such as by using one or more intermediate components. "Axial" refers to the axial direction of the AC motor stator.

[0031] refer to Figures 3 to 10 This disclosure provides a fixing device 10 for fixing the copper busbars of an AC motor and an AC motor stator 100 including the fixing device 10. Specifically, the AC motor stator 100 of this disclosure is different from the AC motor stator 200 in the prior art. Figure 1 Based on the example shown, the fixing device 20 is replaced with the fixing device 10, and the base 101 is adapted accordingly. Specifically, see [link to example]. Figure 1 , Figure 3 ( Figure 3 Reference for components not shown in the diagram Figure 1 The AC motor stator 100 of this utility model includes a frame 101, an iron core 107, an armature winding 102, a lead-out copper busbar 106, and a fixing device 10. The iron core 107 is disposed inside the frame 101 and has winding slots. The armature winding 102 is disposed within the winding slots, with both ends of the armature winding 102 protruding beyond the ends of the iron core 107. One end of the armature winding 102 is electrically connected to the lead-out copper busbar 106. Specifically, the proximal end of the armature winding 102 is connected to a circular busbar 104 made of copper busbar. The busbar 104 is configured with three or four components. When there are three busbars 104, they are designated as U-phase, V-phase, and W-phase busbars; when there are four busbars 104, they are designated as U-phase, V-phase, W-phase, and N-phase busbars. The copper busbars 106 are configured as three, and the three copper busbars 106 are electrically connected to the U-phase busbar, the V-phase busbar, and the W-phase busbar, respectively.

[0032] Specifically, the base 101 can be configured as any housing suitable for accommodating the iron core 107. Preferably, the base 101 is configured as a cylinder. A cable outlet window 108 is provided at the near end of the base 101. One end of the copper busbar 106 is electrically connected to the bus ring 104 and then extends from inside the base 101 through the cable outlet window 108 to the outside of the base 101.

[0033] Referring to Figure 3 and Figure 4 , the fixing device 10 comprises a mounting table 16, a constraint assembly, an upper pressing plate 13 and a lower pressing plate 14. The mounting table 16 is fixed to the base 101, the constraint assembly is provided with a constraint hole 121, and the outgoing copper bar 106 extends through the constraint hole 121. The upper pressing plate 13 and the lower pressing plate 14 are respectively arranged at the top and the bottom of the constraint assembly, and the constraint assembly is clamped by the upper pressing plate 13 and the lower pressing plate 14 through connecting members (such as bolts) to keep the constraint hole 121 tightly fitted with the outgoing copper bar 106. Specifically, the constraint assembly is provided with a connecting hole 122, and the fixing device 10 further comprises a bolt 15, which extends through the upper pressing plate 13, the connecting hole 122 and the lower pressing plate 14 to connect the upper pressing plate 13, the constraint assembly and the lower pressing plate 14 to the mounting table 16.

[0034] Specifically, referring to Figure 3 and Figure 5 , the constraint assembly comprises two parallelly arranged insulation clamping plates 12, and each of the two insulation clamping plates 12 is provided with a constraint groove 123 near one side (i.e. the adjacent side) of the outgoing copper bar 106. The constraint grooves 123 corresponding to the two insulation clamping plates 12 enclose to form the constraint hole 121. Specifically, the fixing device 10 comprises two upper pressing plates 13 and two lower pressing plates 14, and each of the upper pressing plate 13 and the lower pressing plate 14 is provided with a waist-shaped hole 111, and the length direction of the waist-shaped hole 111 extends along the axial direction. Referring to Figure 3 and Figure 4 , the outgoing line window 108 is configured as a transversely extending opening, the mounting table 16 is configured as two, and the two mounting tables 16 are arranged at two ends of the outgoing line window 108. The two upper pressing plates 13 are respectively arranged at the top of the two ends of the two insulation clamping plates 12, and the two lower pressing plates 14 are respectively arranged at the bottom of the two ends of the two insulation clamping plates 12 and are respectively located on one mounting table 16. Each upper pressing plate 13 is connected to the mounting table 16 through one bolt 15, so that the two insulation clamping plates 12 are clamped and fixed by the upper pressing plate 13 and the lower pressing plate 14.

[0035] Specifically, referring to Figure 3 , Figure 5 and Figure 6The insulating clamping plates 12 extend in the transverse direction, and each of the insulating clamping plates 12 is provided with three constraint grooves 123 arranged in the transverse direction on the side close to the outgoing copper bar 106. Two insulating clamping plates 12 are arranged oppositely, and the corresponding constraint grooves 123 of the two insulating clamping plates 12 form three constraint holes 121. More specifically, each of the two ends of the insulating clamping plate 12 is provided with a connecting groove 124 on the side close to the outgoing copper bar 106 (the same side as the constraint grooves 123). The corresponding connecting grooves 124 of the two insulating clamping plates 12 enclose two connecting holes 122. The connecting holes 122 provide a space for the axial movement of the bolts 15, and the axial width of the connecting holes 122 is preferably greater than or equal to the length of the waist-shaped holes 111. Preferably, the connecting holes 122 are configured in the shape of a U with the opening facing outward. Figure 3 、 Figure 7 and Figure 8 The upper pressing plate 13 and the lower pressing plate 14 are each provided with a waist-shaped hole 111, and the bolts 15 extend through the waist-shaped holes 111 of the upper pressing plate 13, the connecting holes 122 of the constraint assembly, and the waist-shaped holes 111 of the lower pressing plate 14 in sequence and are coupled to the threaded holes 113 of the mounting table 16. The waist-shaped holes 111 provide a space for the axial movement of the bolts 15.

[0036] Since the waist-shaped holes 111 and the connecting holes 122 provide a space for the axial movement of the bolts 15, although the actual axial position of the outgoing copper bar 106 is determined by the manufacturing deviation and cumulative tolerance of the associated components, so that there is a deviation between the actual axial position of the outgoing copper bar 106 and the expected position, by arranging the two insulating clamping plates 12 on both sides of the outgoing copper bar 106, the bolts 15 extend through the two waist-shaped holes 111 and the connecting holes 122 with axial movement space and are coupled to the threaded holes 113 of the mounting table 16, so that the axial position of the constraint holes 121 can be adjusted adaptively according to the actual axial position of the outgoing copper bar 106, and the two insulating clamping plates 12 are reliably clamped and fixed by the bolts 15, so that the outgoing copper bar 106 is limited in the constraint holes 121. Preferably, the axial width of the constraint holes 121 is slightly smaller than the thickness of the outgoing copper bar 106, so that the outgoing copper bar 106 can be precisely fitted with the insulating clamping plates 12. That is, when the fixing device 10 fixes the outgoing copper bar 106, the waist-shaped holes 111 and the connecting holes 122 provide an axial adjustment space for the positional deviation of the outgoing copper bar 106.

[0037] Alternatively, the upper pressing plate 13 and the lower pressing plate 14 are not provided with waist-shaped holes 111, but are provided with other holes that can provide a space for the axial movement of the bolts 15, such as oval holes.

[0038] Specifically, referring to Figure 3 、 Figures 5 to 8The upper pressing plate 13 and the lower pressing plate 14 are provided with wedge-shaped joint surfaces 112 on the side close to the insulating clamping plate 12, and the insulating clamping plate 12 is provided with pressing plate joint surfaces 125 matched with the wedge-shaped joint surfaces 112, i.e. the upper and lower surfaces of the two ends of the insulating clamping plate 12 are configured as the pressing plate joint surfaces 125. Preferably, the wedge-shaped joint surfaces are configured as V-shaped, and the opening of the V-shaped is towards the insulating clamping plate 12, and the waist-shaped hole 111 is arranged in the middle of the upper pressing plate 13 and the lower pressing plate 14. The two pressing plate joint surfaces 125 at the same end of the insulating clamping plate 12 are configured as two inclined surfaces gradually converging from the side close to the outgoing copper bar 106 to the side away from the outgoing copper bar 106, and the slopes of the two inclined surfaces are consistent with the slopes of the two symmetrical inclined surfaces in the wedge-shaped joint surface 112. During the fastening of the bolt 15, the upper and lower pressing plates and the insulating clamping plate are in contact through the wedge-shaped joint surface 112 and the pressing plate joint surface 125, so that the upper pressing plate 13 and the lower pressing plate 14 can push the two insulating clamping plates 12 to converge in the middle during the process of gradually approaching until the two insulating clamping plates 12 are in contact or the outgoing copper bar 106 is in contact with the two insulating clamping plates 12, which will facilitate the fixation of the outgoing copper bar 106.

[0039] Specifically, referring to Figure 3 , Figure 4 , Figure 7 and Figure 8 , the side of the lower pressing plate 14 opposite to the wedge-shaped joint surface 112 is configured to be matched with the upper surface of the mounting table 16. Preferably, the upper surface of the mounting table 16 is configured as a plane, and the side of the lower pressing plate 14 opposite to the wedge-shaped joint surface 112 is configured as a plane 114. Specifically, the lower surface of the mounting table 16 is configured as an arc surface suitable for being attached to the outer surface of the base 101, and the mounting table 16 can be coupled to the base 101 by welding or the like. Alternatively, in some embodiments, a part of the base 101 can be directly processed to be suitable for being combined with the lower surface of the lower pressing plate 14, and the screw hole 113 is arranged on the part.

[0040] Preferably, the side of the upper pressing plate 13 opposite to the wedge-shaped joint surface 112 is configured as a plane, i.e. the upper surface of the upper pressing plate 13 is configured as a plane, which will facilitate the fixation of the bolt 15. And at this time, the upper pressing plate 13 and the lower pressing plate 14 are consistent in structure, which will facilitate the production and manufacturing.

[0041] Continuing to refer to Figure 5 , Figure 6 , specifically, the upper surface of the insulating clamping plate 12 can be configured as a plane, and the lower surface thereof can be configured as a base joint surface 126 suitable for being attached to the arc surface of the outer surface of the base 101. In some embodiments, the lower surface of the insulating clamping plate 12 can not be attached to the base, and there is a gap between the two.

[0042] In the following Figure 9 , Figure 10The assembling process of the fixing device 10 of the present disclosure is described in detail with the preferred embodiment of the present application. Firstly, the two insulation clamping plates 12 are clamped on both sides of the outgoing copper bar 106 respectively; then, a lower pressing plate 14 is inserted into the lower end of each of the two insulation clamping plates 12, and an upper pressing plate 13 is placed on the upper end of each of the two insulation clamping plates 12, and the insulation clamping plates 12, the upper and lower pressing plates are adjusted to make the wedge-shaped joint surface 112 and the pressing plate joint surface 125 well matched; then, the two bolts 15 are respectively inserted through the upper and lower pressing plates 13 and 14 at the two ends of the insulation clamping plates 12 and screwed into the screw holes 113 of the mounting table 16.

[0043] When the outgoing copper bar 106 is fixed by using the fixing device 10 of the present disclosure, the axial position of the insulation clamping plate 12 can be adjusted through the holes (such as waist-shaped holes or oval holes) on the upper and lower pressing plates; during the fastening process, due to the cooperation of the wedge-shaped joint surface 112 and the pressing plate joint surface 125, the upper and lower pressing plates can push the two insulation clamping plates 12 to move closer to the middle, so that the outgoing copper bar 106 is in good contact with the two insulation clamping plates 12 and is effectively fixed. When the two bolts 15 are tightened, the insulation clamping plates 12 are fixed at the appropriate axial position according to the position of the outgoing copper bar 106, and the outgoing copper bar 106 is in good contact with the two insulation clamping plates 12 and is effectively fixed.

[0044] The AC motor stator of the present disclosure, based on the existing AC motor stator, changes the fixing device and the components related to the fixing device, without affecting the machining steps and assembly process of other components, so that the outgoing copper bar 106 can be effectively fixed without violence, thereby improving the assembly efficiency and quality of the AC motor stator.

[0045] The above only describes several embodiments of the present disclosure, and those skilled in the art can make various modifications or changes to the embodiments of the present disclosure according to the disclosed content of the application file without departing from the spirit and scope of the present disclosure.

Claims

1. A fixing device for fixing an outgoing copper bar of an alternating current motor, the stator of the alternating current motor comprising a frame, the frame being provided with an outgoing window, the outgoing copper bar extending through the outgoing window, characterized in that, The utility model relates to a fixing device for fixing the outgoing copper bar of a motor, comprising: two mounting tables fixed to the base, the two mounting tables being located at two ends of the outgoing window respectively; two parallel insulation clamping plates, each of the two insulation clamping plates being provided with a constraint groove on one side thereof, the constraint grooves of the two insulation clamping plates corresponding to each other enclosing a constraint hole, the outgoing copper bar extending through the constraint hole; two upper pressing plates and two lower pressing plates, each of the upper pressing plates and the lower pressing plates being provided with a hole having an axial adjustment space, the two upper pressing plates being arranged on the top of the two ends of the two insulation clamping plates respectively, the two lower pressing plates being arranged on the bottom of the two ends of the two insulation clamping plates respectively and located on one mounting table respectively; each of the upper pressing plates being connected to the mounting table through a bolt, so that the two insulation clamping plates are clamped and fixed by the upper pressing plates and the lower pressing plates.

2. The fixture of claim 1, wherein each of the two ends of the two insulation clamping plates being provided with a connecting groove, the connecting grooves of the two insulation clamping plates corresponding to each other enclosing a connecting hole, the hole having an axial adjustment space being arranged in the middle of the upper pressing plate and the lower pressing plate, the bolt extending through the hole having an axial adjustment space of the upper pressing plate, the connecting hole and the hole having an axial adjustment space of the lower pressing plate in sequence and being connected to the mounting table.

3. The fixture of claim 2, wherein The hole having an axial adjustment space is configured as a waist-shaped hole, and the connecting hole is configured as a U-shaped opening facing the outside.

4. The fixture of claim 1, wherein Each of the upper pressing plate and the lower pressing plate is provided with a wedge-shaped joint surface on the side close to the insulation clamping plate, each of the two ends of the insulation clamping plate is provided with a pressing plate joint surface matched with the wedge-shaped joint surface, and the slope of the wedge-shaped joint surface is consistent with the slope of the pressing plate joint surface.

5. The fixture of claim 4, wherein The wedge-shaped joint surface is configured as a V-shaped opening facing the insulation clamping plate.

6. The fixture of claim 5, wherein The upper surface of the mounting table is configured as a plane, and the lower surface of the lower pressing plate is configured as a plane suitable for being combined with the upper surface of the mounting table.

7. The fixture of claim 6, wherein The upper surface of the upper pressing plate is configured as a plane.

8. An alternating current motor stator characterized by, The utility model relates to a motor, comprising a base, an iron core, an armature winding, an outgoing copper bar and the fixing device of any one of claims 1-7, the iron core being arranged on the inside of the base, the iron core having a winding slot, the armature winding being arranged in the winding slot, the two ends of the armature winding protruding from the end of the iron core, one end of the armature winding being electrically connected to the outgoing copper bar.

9. The alternating current motor stator of claim 8, wherein, The outgoing copper bar is configured as three, each of the two insulation clamping plates being provided with three constraint grooves arranged at intervals in the transverse direction, the two insulation clamping plates enclosing three constraint holes.

10. The alternating current motor stator of claim 8, wherein, The base is configured as a cylinder, and the lower surface of the mounting table and the lower surface of the insulation clamping plate are both configured as an arc surface suitable for being attached to the outer surface of the base.

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