Glue pouring tool for motor stator

Abstract

The utility model relates to a glue pouring tool for a motor stator. The glue pouring tool comprises a fixing assembly and an expansion mandrel. In the actual use process of the glue pouring tool for the motor stator, the glue pouring tool for the motor stator fixed with the motor stator is placed into an industrial oven together to be heated to the pouring sealant curing temperature, and the glue pouring tool is tightly attached to the motor stator due to the thermal expansion effect of the expansion mandrel; therefore, when the pouring sealant is injected between the expansion mandrel and the fixing assembly, the sealing effect and the sealant leakage prevention effect are achieved, after the pouring sealant is solidified and then cooled to the room temperature, the expansion mandrel shrinks along with temperature reduction at the moment, the diameter of the expansion mandrel shrinks to the size of the room temperature, demolding can be achieved through gentle extrusion, and due to the fact that the expansion mandrel has the self-lubricating characteristic, the sealing effect is good. Pouring sealants cannot be adsorbed, and residual sealants cannot be left on the expansion mandrel; the expansion mandrel can be repeatedly used, so that the cost is reduced. Therefore, the demolding difficulty is reduced by using the expansion mandrel with the characteristic of thermal expansion and cold contraction, and the motor stator is protected.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of potting, in particular to a motor stator potting tool. BACKGROUND

[0002] The motor is a very important component in the molecular pump. When the molecular pump is running, a large amount of heat is generated in the motor coil. Since the motor coil is sandwiched between the insulating layer and the metal shell of the motor in a vacuum environment, it is not conducive to heat conduction in the coil, and long-time high-current operation can easily cause the motor to overheat and burn out. Therefore, in order to enhance the heat dissipation performance of the motor coil and improve the stability of the molecular pump operation, it is necessary to use glue to pot the motor coil part.

[0003] At present, the motor stator potting is through the rigid shaft core into the coil winding, and the coil in the coil winding is fixed on the silicon steel sheet with potting glue. In order to prevent the glue from overflowing from the gap between the rigid shaft core and the inner circle of the silicon steel sheet, a sealing strip needs to be added.

[0004] However, in the prior art, the rigid shaft core is easily damaged by the silicon steel sheet when demolding, the core rigid shaft needs to be frequently replaced, the potting cost is relatively high, but if the rigid shaft core is not replaced in time, it will cause quality problems of the potting surface of the coil winding. Moreover, the rigid shaft core and the coil winding are very close, and a hammer or a stamping machine needs to be used for stamping when demolding, which can easily cause damage to other positions of the coil winding. CONTENT OF THE UTILITY MODEL

[0005] Therefore, it is necessary to provide a motor stator potting tool in view of the problems in the prior art that the rigid shaft core is easily damaged by the silicon steel sheet of the molecular pump motor stator when demolding, the core rigid shaft needs to be frequently replaced, the potting cost is relatively high, but if the rigid shaft core is not replaced in time, it will cause quality problems of the potting surface of the motor, and the rigid shaft core and the inner hole of the motor are very close, and a hammer or a stamping machine needs to be used for stamping when demolding, which can easily cause damage to other positions of the motor.

[0006] A motor stator potting tool, the motor stator has a coil winding, one end of the coil winding is a terminal, and the inner wall of the coil winding has a plurality of teeth, the plurality of teeth are uniformly and spaced arranged around the coil winding;

[0007] The motor stator potting tool comprises a fixing assembly and an expansion mandrel;

[0008] The fixing assembly is arranged outside the coil winding, and the expansion mandrel is arranged in the coil winding and abuts against the teeth of the coil winding;

[0009] The expansion mandrel extends out of the terminal, the part of the expansion mandrel extending out of the terminal is spaced apart from the fixing assembly along the radial direction of the expansion mandrel, and the expansion mandrel and the fixing assembly are used for potting.

[0010] The expansion mandrel is capable of expanding in volume when the temperature increases, so that one end of the tooth is trapped in and abuts against the side wall of the expansion mandrel;

[0011] The expansion mandrel is capable of shrinking in volume along the radial direction thereof when the temperature decreases.

[0012] In an embodiment, the motor stator glue-filling tool further comprises a first sealing ring, an outer wall of the expansion mandrel or an inner wall of the fixing assembly is provided with a first groove extending in the circumferential direction of the expansion mandrel, and the first sealing ring is located in the first groove and tightly abuts against the fixing assembly and the expansion mandrel, respectively.

[0013] In an embodiment, the fixing assembly comprises a fixing ring and a fixing seat.

[0014] The fixing ring is sleeved on the wiring end of the coil winding and is arranged in the radial direction of the fixing ring and spaced apart from the expansion mandrel.

[0015] The fixing seat is provided with a fixing hole, the expansion mandrel is arranged in the fixing hole and the coil winding, and one end of the coil winding away from the fixing ring is arranged in the fixing seat.

[0016] In an embodiment, one end of the fixing seat close to the fixing ring is provided with a fixing groove, the fixing groove is communicated with the fixing hole and forms a stepped hole, and one end of the coil winding away from the fixing ring is arranged in the bottom wall of the fixing groove.

[0017] In an embodiment, the fixing assembly further comprises a fixing cylinder.

[0018] One end of the fixing cylinder is sleeved on the outer wall of the first protruding ring, and the other end of the fixing cylinder is sleeved on the outer wall of the fixing ring.

[0019] In an embodiment, the inner wall of the fixing cylinder is provided with a second protruding ring, one end of the second protruding ring abuts against one end of the fixing ring close to the fixing seat, and the other end of the second protruding ring abuts against one end of the first protruding ring close to the fixing ring.

[0020] In an embodiment, the fixing assembly further comprises two groups of fasteners, the outer wall of one end of the fixing cylinder close to the fixing seat is provided with two groups of protruding portions, the fixing seat close to the fixing ring is provided with two groups of second fastening holes, the two groups of fasteners, the two groups of protruding portions and the two groups of second fastening holes are one-to-one corresponding, and the fasteners are arranged in the first fastening holes and the second fastening holes to connect the fixing cylinder and the fixing seat.

[0021] In an embodiment, the first fastening hole comprises a first hole and a second hole in communication, the second hole is located on one side of the first hole close to the second fastening hole, the inner diameter of the first hole is larger than that of the second hole, and the first hole is used for accommodating the head of the fastener.

[0022] In an embodiment, the two groups of protrusions are uniformly arranged around the circumference of the expansion mandrel.

[0023] In an embodiment, the motor stator glue pouring tool further comprises a second sealing ring, the outer wall of the first protruding ring or the inner wall of the fixed cylinder has a second groove extending around the circumference of the expansion mandrel, the second sealing ring is located in the second groove, and the second sealing ring is in close abutment with the first protruding ring and the fixed cylinder, respectively.

[0024] In actual use, the motor stator glue pouring tool described above is first sleeved on the outer wall of the coil winding of the motor stator and abuts against the outer wall of the coil winding, then the expansion mandrel is inserted into the coil winding, and the outer wall of the expansion mandrel preliminarily abuts against the teeth of the coil winding, and then the motor stator glue pouring tool with the motor stator fixed thereon is placed in an industrial oven and heated to a curing temperature of the pouring sealant. Due to the thermal expansion of the expansion mandrel, the expansion mandrel is tightly attached to the motor stator, so that the pouring sealant injected between the expansion mandrel and the fixed assembly plays a role of sealing and preventing leakage of the glue. After the pouring sealant is cured and cooled to room temperature, the expansion mandrel shrinks with the temperature drop, and the diameter of the expansion mandrel is cold shrunk to the size at room temperature. The expansion mandrel can be demolded by gentle extrusion. Since the expansion mandrel has the self-lubricating property, it does not adsorb the pouring sealant, and residual glue does not remain on the expansion mandrel. The expansion mandrel can be reused, thereby reducing the cost. Thus, the difficulty of demolding is reduced by using the expansion mandrel with the thermal expansion and cold shrinkage property, thereby protecting the motor stator. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a cross-sectional view of the motor stator glue pouring tool of an embodiment for installing a coil winding.

[0026] Figure 2 It is a top view of Figure 1

[0027] BRIEF DESCRIPTION OF DRAWINGS

[0028] 100 - motor stator glue pouring tool;

[0029] 110 - fixed assembly;

[0030] 120 - expansion mandrel;

[0031] ​130 - first sealing ring; 131 - first groove; 132 - second sealing ring; 133 - second groove;

[0032] 140 - fixing ring;

[0033] 150 - fixing seat; 151 - fixing hole; 152 - fixing groove; 153 - first convex ring;

[0034] 160 - fixing cylinder; 161 - second convex ring; 162 - convex part; 163 - first fastening hole; 164 - first hole; 165 - second hole;

[0035] 200 - motor stator; 210 - coil winding; 211 - terminal; 212 - tooth. DETAILED DESCRIPTION

[0036] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described herein and by one of ordinary skill in the art without departing from the spirit and scope of the present application, and it is therefore intended that all such variations be considered as falling within the scope of the present application. It should be understood that the use of "including", "comprising", or "having" and variations thereof herein are meant to encompass the items listed thereafter and equivalents thereof as well as additional items.

[0037] In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0038] In addition, if the terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0039] In the present application, unless specifically defined otherwise, if there are terms such as "mount", "connect", "connect", "fix" and the like, these terms should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] In the present application, unless specifically defined otherwise, if there are terms such as "mount", "connect", "connect", "fix" and the like, these terms should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are for illustrative purposes only and are not the only embodiment.

[0042] Referring to Figure 1 , Figure 1 The structure of the motor stator glue filling tool 100 in the embodiment of the present application is shown. The motor stator glue filling tool 100 provided by the embodiment of the present application comprises a fixing assembly 110 and an expanded mandrel 120.

[0043] The motor stator 200 in the application has a coil winding 210, one end of the coil winding 210 is a terminal 211, the inner wall of the coil winding 210 has a plurality of teeth 212, the plurality of teeth 212 are uniformly spaced around the circumference of the coil winding 210, and the teeth 212 extend along the axial direction of the coil winding 210. The fixing assembly 110 is sleeved on the outer side of the coil winding 210, and the expansion mandrel 120 is arranged in the coil winding 210 and tightly abuts against the teeth 212 on the inner wall of the coil winding 210. The part of the expansion mandrel 120 protruding from the terminal 211 is spaced apart from the fixing assembly 110 along the radial direction of the expansion mandrel 120, and the expansion mandrel 120 and the fixing assembly 110 are used for glue pouring. The volume of the expansion mandrel 120 can expand when the temperature rises, so that one end of the tooth 212 is sunk into the side wall of the expansion mandrel 120 and abuts against the side wall of the expansion mandrel 120; the volume of the expansion mandrel 120 can shrink along the radial direction thereof when the temperature decreases, so that the abutting force between the expansion mandrel 120 and the tooth 212 is reduced or even separated.

[0044] Referring to Figure 1 and Figure 2 In actual use, the motor stator glue pouring tool 100 described above is first sleeved on the outer wall of the coil winding 210 of the motor stator 200 and abuts against the outer wall of the coil winding 210, then the expansion mandrel 120 is inserted into the coil winding 210, and the outer wall of the expansion mandrel 120 preliminarily abuts against the teeth 212 of the coil winding 210, and then the motor stator glue pouring tool 100 with the coil winding 210 is placed in an industrial oven and heated to a pouring glue curing temperature. Since the expansion mandrel 120 tightly abuts against the motor stator 200 due to thermal expansion, when the pouring glue is injected between the expansion mandrel 120 and the fixing assembly 110, it plays a role of sealing and preventing glue leakage. After the pouring glue is cured and cooled to room temperature, the expansion mandrel 120 shrinks with the decrease in temperature, and the diameter of the expansion mandrel 120 is cold shrunk to the size at room temperature. The expansion mandrel 120 can be demolded by gentle extrusion. Since the expansion mandrel 120 has the self-lubricating property, it does not adsorb the pouring glue, and residual glue will not remain on the expansion mandrel 120. The expansion mandrel 120 can be repeatedly used, thereby reducing the cost. Thus, by using the expansion mandrel 120 with the thermal expansion and cold shrinkage properties, the demolding difficulty is reduced, and the motor stator 200 is protected.

[0045] Specifically, the coil winding in the application is a plurality of silicon steel sheets arranged in a cylindrical shape as teeth, and the coil winding is arranged outside the plurality of silicon steel sheets and fixed by pouring glue to form the coil winding. Thus, by the external fixing assembly and the internal expansion mandrel, the cylindricity and concentricity of the outer circle of the plurality of silicon steel sheets are ensured.

[0046] Preferably, the material of the expansion mandrel 120 is stainless steel. Since the stainless steel has the self-lubricating property, it does not adsorb the pouring glue, and residual glue will not remain on the expansion mandrel 120. The expansion mandrel 120 can be repeatedly used, thereby reducing the cost.

[0047] Specifically, the linear expansion coefficient of the expansion mandrel 120 is 7.5*10K-8.5*10K, the tensile elastic modulus is 2830-8300 MPa, and the thermal conductivity is 0.23 W / (m*K).

[0048] In an embodiment, the motor stator glue pouring tool 100 further comprises a first sealing ring 130, the outer wall of the expansion mandrel 120 is provided with a first groove 131 extending around the circumference of the expansion mandrel 120, and the first sealing ring 130 is located in the first groove 131 and tightly abuts against the fixing assembly 110 and the expansion mandrel 120 respectively, so as to seal the gap between the fixing assembly 110 and the expansion mandrel 120 through the first sealing ring 130.

[0049] In another embodiment, the first groove 131 is formed in the inner wall of the fixing assembly 110.

[0050] Referring to Figure 1 and Figure 2 In an embodiment, the fixing assembly 110 comprises a fixing ring 140 and a fixing seat 150. The fixing ring 140 is sleeved on the wire end 211 of the coil winding 210 and is spaced apart from the expansion mandrel 120 along the radial direction of the fixing ring 140. The fixing seat 150 is provided with a fixing hole 151, the expansion mandrel 120 passes through the coil winding 210 and the fixing hole 151, and the end of the coil winding 210 away from the fixing ring 140 is spaced apart from the fixing seat 150.

[0051] In this embodiment, the fixing seat 150 is fixed at the position to be installed, so that the entire motor stator glue pouring tool 100 is placed vertically, the fixing ring 140 and the expansion mandrel 120 are spaced apart by a gap along the radial direction of the fixing ring 140 and face upward, so as to facilitate the injection of glue into the above-mentioned gap. Specifically, the end of the coil winding 210 away from the fixing ring 140 is spaced apart from or abuts against the fixing seat 150.

[0052] Referring to Figure 1 and Figure 2 In an embodiment, the end of the fixing seat 150 close to the fixing ring 140 is provided with a fixing groove 152, the fixing groove 152 is communicated with the fixing hole 151 and forms a stepped hole, and the end of the coil winding 210 away from the fixing ring 140 is spaced apart from the bottom wall of the fixing groove 152. In this embodiment, the fixing groove 152 is used to position the coil winding 210.

[0053] Referring to Figure 1 and Figure 2In an embodiment, the fixing assembly 110 further comprises a fixing cylinder 160. The fixing seat 150 has a first protruding ring 153 on one side close to the fixing ring 140, and one end of the fixing cylinder 160 is sleeved on the outer wall of the first protruding ring 153, and the other end of the fixing cylinder 160 is sleeved on the outer wall of the fixing ring 140. In this embodiment, the fixing cylinder 160 realizes the connection of the fixing seat 150 and the fixing ring 140, so as to facilitate the assembly of the fixing assembly 110 and realize more stable fixation of the coil winding 210, and the first protruding ring 153 realizes the limiting of the fixing cylinder 160.

[0054] Specifically, the first recess 131 can be arranged on the inner wall of the fixing hole 151.

[0055] Referring to Figure 1 and Figure 2 In an embodiment, the inner wall of the fixing cylinder 160 has a second protruding ring 161, one end of the second protruding ring 161 abuts against one end of the fixing ring 140 close to the fixing seat 150, and the other end of the second protruding ring 161 abuts against one end of the first protruding ring 153 close to the fixing ring 140, so as to realize stable abutment between the fixing cylinder 160, the fixing ring 140 and the fixing seat 150 through the second protruding ring 161, instead of only realizing position fixation through radial abutment force. Specifically, the inner wall of the second protruding ring 161 abuts against the outer wall of the coil winding 210, so as to realize abutment on both inner and outer sides of the coil winding 210, and realize more stable fixation of the coil winding 210.

[0056] Referring to Figure 1 and Figure 2 In an embodiment, the fixing assembly 110 further comprises two sets of fasteners, and the outer wall of one end of the fixing cylinder 160 close to the fixing seat 150 has two sets of protruding parts 162. The protruding part 162 is provided with a first fastening hole 163, and the side of the fixing seat 150 close to the fixing ring 140 is provided with two sets of second fastening holes, the two sets of fasteners, the two sets of protruding parts 162 and the two sets of second fastening holes are one-to-one corresponding, and the fasteners are arranged in the first fastening hole 163 and the second fastening hole to connect the fixing cylinder 160 and the fixing seat 150. Through the two sets of fasteners, the fixation between the fixing cylinder 160 and the fixing seat 150 in at least two circumferential directions around the expansion mandrel 120 is realized.

[0057] Referring to Figure 1 and Figure 2 In an embodiment, the first fastening hole 163 comprises a first hole 164 and a second hole 165 connected in communication, the second hole 165 is located on one side of the first hole 164 close to the second fastening hole, the inner diameter of the first hole 164 is larger than that of the second hole 165, and the first hole 164 is used for accommodating the head of the fastener. Specifically, the fastener is a bolt, and the head of the bolt is located in the first hole 164.

[0058] Referring to Figure 1 andFigure 2 In an embodiment, the two groups of protrusions 162 are evenly arranged around the circumference of the expansion mandrel 120, so that the fixing force between the fixing cylinder 160 and the fixing seat 150 is more evenly distributed, preventing leakage.

[0059] Referring to Figure 1 and Figure 2 In an embodiment, the motor stator glue pouring tool 100 further comprises a second sealing ring 132, the outer wall of the first protruding ring 153 has a second groove 133 extending around the circumference of the expansion mandrel 120, and the second sealing ring 132 is located in the second groove 133 and tightly abuts against the first protruding ring 153 and the fixing cylinder 160, thereby sealing the gap between the fixing cylinder 160 and the fixing seat 150 and preventing glue leakage.

[0060] Specifically, since one end of the coil winding 210 away from the fixing ring 140 is spaced apart from the bottom wall of the fixing groove 152, after the pouring glue is injected between the expansion mandrel 120 and the fixing assembly 110, it will enter the fixing groove 152 through the gap between the two teeth 212, and since the second sealing ring 132 seals the gap between the first protruding ring 153 and the fixing cylinder 160, the glue pouring at both ends of the coil winding 210 can be realized.

[0061] Specifically, the fixing groove 152 is formed in the first protruding ring 153 and is connected with the fixing hole 151.

[0062] In another embodiment, the inner wall of the fixing cylinder 160 is provided with a second groove 133.

[0063] The technical features of the above embodiments can be combined in any way. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not contradict, they should be considered as within the scope of the present disclosure.

[0064] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A motor stator glue potting tool, wherein the motor stator has a coil winding, one end of the coil winding is a terminal, and the inner wall of the coil winding has a plurality of teeth, and the plurality of teeth are evenly spaced around the circumference of the coil winding; It is characterized in that The motor stator glue filling tooling includes: a fixing component and an expansion mandrel; The fixing assembly is sleeved on the outside of the coil winding, and the expansion core shaft is passed through the coil winding and abuts against the teeth of the coil winding; The expansion mandrel extends out of the terminal; the portion of the expansion mandrel extending out of the terminal and the fixed component are spaced apart along the radial direction of the expansion mandrel; glue is poured between the expansion mandrel and the fixed component; The expansion mandrel is capable of expanding in volume when the temperature rises, so that one end of the tooth sinks into the side wall of the expansion mandrel and abuts against the side wall of the expansion mandrel; The expansion mandrel can shrink in volume along its radial direction when the temperature decreases.

2. The motor stator glue filling tool according to claim 1, characterized in that: The motor stator glue potting tool also includes a first sealing ring. The outer wall of the expansion core shaft or the inner wall of the fixed component has a first groove. The first groove extends around the circumference of the expansion core shaft. The first sealing ring is located in the first groove. The first sealing ring is tightly abutted against the fixed component and the expansion core shaft respectively.

3. The motor stator glue filling tool according to claim 1, characterized in that: The fixing assembly includes a fixing ring and a fixing seat; The fixing ring is sleeved on the connection end of the coil winding and is spaced apart from the expansion core shaft along the radial direction of the fixing ring; The fixing seat is provided with a fixing hole, the expansion core shaft is passed through the coil winding and the fixing hole, and one end of the coil winding away from the fixing ring is spaced apart from the fixing seat.

4. The motor stator glue filling tool according to claim 3, characterized in that: A fixing groove is formed at one end of the fixing seat close to the fixing ring. The fixing groove is connected to the fixing hole to form a stepped hole. An end of the coil winding facing away from the fixing ring is spaced apart from the bottom wall of the fixing groove.

5. The motor stator glue filling tool according to claim 3, characterized in that: The fixing assembly further includes a fixing cylinder; The fixing seat has a first convex ring on one side close to the fixing ring. One end of the fixing tube is sleeved on the outer wall of the first convex ring, and the other end of the fixing tube is sleeved on the outer wall of the fixing ring.

6. The motor stator glue pouring tool according to claim 5, characterized in that: The inner wall of the fixing cylinder has a second convex ring, one end of the second convex ring abuts against one end of the fixing ring close to the fixing seat, and the other end of the second convex ring abuts against one end of the first convex ring close to the fixing ring.

7. The motor stator glue pouring tool according to claim 5, characterized in that: The fixing assembly also includes two groups of fasteners. The outer wall of the fixing tube near one end of the fixing base has two groups of protrusions; the protrusions are provided with a first fastening hole, and the fixing base is provided with two groups of second fastening holes on one side near the fixing ring. The two groups of fasteners, the two groups of protrusions and the two groups of second fastening holes correspond one to one, and the fasteners are passed through the first fastening holes and the second fastening holes to connect the fixing tube and the fixing base.

8. The motor stator glue pouring tool according to claim 7, characterized in that: The first fastening hole includes a first hole and a second hole that are connected. The second hole is located on a side of the first hole close to the second fastening hole. The inner diameter of the first hole is larger than that of the second hole. The first hole is used to accommodate the head of the fastener.

9. The motor stator glue potting tool according to claim 7, characterized in that: The two groups of protrusions are evenly arranged around the circumference of the expansion core shaft.

10. The motor stator glue potting tool according to claim 5, characterized in that: The motor stator glue potting tool also includes a second sealing ring. The outer wall of the first convex ring or the inner wall of the fixed cylinder has a second groove. The second groove extends around the circumference of the expansion core shaft. The second sealing ring is located in the second groove. The second sealing ring is tightly abutted against the first convex ring and the fixed cylinder respectively.

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