Coil glue injection tool and glue injection system

Abstract

The utility model relates to a coil glue injection tool and a glue injection system.The coil glue injection tool comprises a mandrel, first bosses, a sleeve and a connecting assembly, the diameter of the mandrel is smaller than the inner diameter of a coil to be subjected to glue injection, the multiple first bosses are arranged on the peripheral side of the mandrel in a protruding mode, the side faces, back to the mandrel, of the first bosses are positioning faces, and the sleeve is provided with a cylindrical hole; a glue injection area is defined by the area between the cylindrical hole and the core shaft, a glue injection opening and a glue outlet are formed in the two ends, in the axis direction of the core shaft, of the glue injection area respectively, and the connecting assembly is connected to the core shaft and the sleeve. According to the embodiment of the invention, the glue injection time consumption of the coil can be improved, the glue injection efficiency can be improved, and the inner circumferential surface and the outer circumferential surface of the coil can easily achieve relatively high coaxiality after glue injection, so that the motor has relatively long service life.

Description

Technical Field

[0001] The present application relates to the technical field of glue injection tooling, and in particular to a coil glue injection tooling and a glue injection system. Background Art

[0002] A motor is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. The coil is an important part of the motor. The stator of some motors is composed of a coil wound with a wire, and the rotor is located inside the coil. In order to solve the problem of short circuit and temperature rise caused by wear between the rotor and the coil during high-speed operation of the motor, it is necessary to apply glue on the inner and outer surfaces of the coil to play the role of insulation and heat dissipation.

[0003] At present, generally, shaft parts are first inserted into the inner side of the coil, and the coil is initially positioned through the outer circumference of the shaft parts, so that glue is injected into the outer circumference of the coil. Then, the shaft parts are pulled out, and sleeve parts are sleeved on the outer side of the coil. The coil is secondarily positioned through the inner circumference of the sleeve parts, so that glue is injected into the inner circumference of the coil.

[0004] Since the coil needs to be positioned twice and the glue is injected in two steps during the glue injection process, the injection of the coil takes a long time. In addition, since the positioning references of the two positionings are inconsistent, the coaxiality between the inner circumference of the coil and the outer circumference of the coil after glue injection is poor, which increases the risk of eccentricity of the rotor relative to the stator during motor operation, thereby increasing the possibility of friction between the stator and the rotor, affecting the service life of the motor. Utility Model Content

[0005] The embodiment of the present application provides a coil glue injection tooling, which can reduce the time consumption of coil glue injection and improve the glue injection efficiency. After the glue injection, the inner circumference of the coil and the outer circumference of the coil can easily achieve a relatively high coaxiality, so that the motor has a relatively long service life.

[0006] In the first aspect, an embodiment of the present application provides a coil injection tool, which includes: a core shaft, the diameter of the core shaft is smaller than the inner diameter of the coil to be injected with glue; a first boss, a plurality of first bosses are all protruding from the circumferential side of the core shaft, the side of the first boss facing away from the core shaft is a positioning surface, which is used to abut against the inner circumferential surface of the coil to be injected with glue, and the first length of the positioning surface along the axial direction of the core shaft and the second length of the positioning surface along the circumference of the core shaft are both below a first preset value, and the first preset value is smaller than the circumference of the core shaft; a sleeve, having a cylindrical hole, which is used to be sleeved on the core shaft, the diameter of the cylindrical hole is larger than the outer diameter of the coil to be injected with glue, the area between the cylindrical hole and the core shaft defines a glue injection area, and the two ends of the glue injection area along the axial direction of the core shaft respectively have a glue injection port and a glue outlet; a connecting component, connected to the core shaft and the sleeve, so that the axis of the core shaft is colinear with the axis of the cylindrical hole.

[0007] In some embodiments, the first preset value is between 0.4 mm and 1 mm.

[0008] In some embodiments, a cross-sectional edge of the first boss is a smooth closed curve.

[0009] In some embodiments, more than two first boss groups are arranged along the axis direction of the core shaft, and each first boss group includes at least three first bosses spaced apart along the circumference of the core shaft.

[0010] In some embodiments, one end of the sleeve is provided with a cylindrical groove connected to the cylindrical hole, and the axis of the cylindrical groove is coaxial with the axis of the cylindrical hole. The connecting component includes: a base, one side of the base is provided with a second boss for being plugged into the cylindrical groove, the diameter of the second boss is the same as the diameter of the cylindrical groove, one end of the core shaft is fixedly connected to the second boss, the cross-section of the second boss is circular, and the axis of the core shaft is coaxial with the axis of the second boss.

[0011] In some embodiments, glue outlet channels and glue storage tanks are successively distributed inside the base, and the two ends of the glue outlet channels are respectively connected to the glue outlet and the glue storage tank. There are multiple glue outlet channels, and the glue storage tank is used to connect to the suction end of the vacuum pump.

[0012] In some embodiments, an annular groove is provided at the other end of the sleeve, and the axis of the annular groove is coaxial with the axis of the cylindrical hole. The connecting assembly also includes: a connecting sleeve, which is provided with a third boss and a limiting through hole. The cross-section of the third boss is annular, and the third boss and the limiting through hole are coaxially arranged. The outer diameter of the third boss is the same as the outer diameter of the annular groove, the inner diameter of the third boss is the same as the inner diameter of the annular groove, the height of the third boss is equal to or less than the height of the annular groove, the third boss is used to be plugged into the annular groove, the diameter of the limiting through hole is the same as the diameter of the core shaft, and the limiting through hole is used to plug the core shaft.

[0013] In some embodiments, the core shaft is provided with a glue injection groove, and when the sleeve is sleeved on the core shaft, the glue injection groove is connected with the glue injection port; the connecting sleeve is provided with a glue injection channel, and when the third boss is inserted into the annular groove, the glue injection channel is connected with the glue injection groove, and the glue injection channel is used to connect to the output end of the glue injection machine or to be used to plug in a sealing glue plug.

[0014] In some embodiments, the portion of the core shaft extending out of the injection port is provided with an avoidance groove extending along its own axial direction for leading out the end of the coil to be injected with glue.

[0015] In the second aspect, an embodiment of the present application provides a coil glue injection system, which includes any of the above-mentioned coil glue injection tooling, and also includes: a glue injection machine, the output end of the glue injection machine is connected to the glue injection port; a vacuum pump, the suction end of the vacuum pump is connected to the glue outlet.

[0016] The coil glue injection tooling and glue injection system of the embodiments of the present application, wherein the coil glue injection tooling includes a core shaft, a first boss, a sleeve and a connecting assembly, the diameter of the core shaft is smaller than the inner diameter of the coil to be injected, and multiple first bosses are all protruding from the circumferential side of the core shaft, and the side of the first boss facing away from the core shaft is a positioning surface, and the first length of the positioning surface along the axis of the core shaft and the second length of the positioning surface along the circumference of the core shaft are both below a first preset value, the sleeve has a cylindrical hole, and the area between the cylindrical hole and the core shaft defines a glue injection area, and the two ends of the glue injection area along the axis of the core shaft respectively have a glue injection port and a glue outlet, and the connecting assembly is connected to the core shaft and the sleeve so that the axis of the core shaft is colinear with the axis of the cylindrical hole. The above-mentioned glue injection tooling only requires one positioning and one glue injection to complete the glue injection work on the inner circumference of the coil and the outer circumference of the coil, thereby reducing the time consumption for glue injection of the coil and improving the glue injection efficiency; since during the installation of the coil glue injection tooling, the coil is positioned only by the positioning surface of the first boss, the inner circumference of the coil and the outer circumference of the coil can be easily achieved to a relatively high coaxiality after glue injection, thereby reducing the risk of eccentricity of the rotor relative to the stator during motor operation, and further reducing the possibility of friction between the stator and the rotor, so that the motor has a relatively long service life; by limiting the first preset value, the glue can flow smoothly from the glue injection port to the glue outlet and evacuate the air in the glue injection area, reducing the risk of bubbles in the glue layer of the coil after glue injection, and relatively improving the glue injection efficiency and the glue layer quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 A schematic diagram of the structure of the coil glue injection tooling provided in an embodiment of the present application;

[0019] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along the AA direction;

[0020] Figure 3 A schematic diagram of the structure of the mandrel and the base provided in an embodiment of the present application;

[0021] Figure 4 A schematic diagram of the structure of the sleeve provided in an embodiment of the present application;

[0022] Figure 5 A schematic diagram of the structure of the connecting sleeve provided in an embodiment of the present application;

[0023] Figure 6 A schematic diagram of the structure of the sealing plug provided in the embodiment of the present application;

[0024] Figure 7 A schematic diagram of the structure of the coil glue injection system provided in an embodiment of the present application.

[0025] In the figure: 1. core shaft; 101. glue injection groove; 102. first boss; 103. avoidance groove; 2. connecting sleeve; 201. glue injection channel; 202. third boss; 203. limiting through hole; 3. sleeve; 301. cylindrical hole; 302. annular groove; 4. base; 401. glue outlet channel; 402. glue storage tank; 403. second boss; 5. coil; 6. vacuum pump; 601. pipeline; 7. glue injection machine; 8. glue sealing plug; 801. handle section; 802. plug-in section. DETAILED DESCRIPTION

[0026] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0028] At present, generally, shaft parts are first inserted into the inner side of the coil, and the coil is initially positioned through the outer circumference of the shaft parts, so that glue is injected into the outer circumference of the coil. Then, the shaft parts are pulled out, and sleeve parts are sleeved on the outer side of the coil. The coil is secondarily positioned through the inner circumference of the sleeve parts, so that glue is injected into the inner circumference of the coil.

[0029] The inventors of this application have discovered through research that, during the glue injection process, the coil needs to be positioned twice and the glue is injected into the coil in two steps, so the injection of glue into the coil takes a long time; in addition, since the positioning references of the two positionings are inconsistent, it is easy to cause poor coaxiality between the inner circumference of the coil and the outer circumference of the coil after glue injection, thereby increasing the risk of eccentricity of the rotor relative to the stator during the operation of the motor, and further increasing the possibility of friction between the stator and the rotor, affecting the service life of the motor.

[0030] In order to solve the problems in the prior art, the present application provides a coil glue injection tool and a glue injection system, which are described in detail below in conjunction with the accompanying drawings.

[0031] Figure 1 A schematic diagram of the structure of the coil glue injection tooling provided in an embodiment of the present application; Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along the AA direction; Figure 3 A schematic diagram of the structure of the mandrel and the base provided in an embodiment of the present application; Figure 4 A schematic diagram of the structure of the sleeve provided in an embodiment of the present application.

[0032] See also Figures 1 to 4 , the embodiment of the present application provides a coil injection tooling comprising: a core shaft 1, a first boss 102, a sleeve 3 and a connecting assembly, wherein the diameter of the core shaft 1 is smaller than the inner diameter of the coil 5 to be injected with glue; multiple first bosses 102 are all protruded on the circumferential side of the core shaft 1, and the side of the first boss 102 facing away from the core shaft 1 is a positioning surface, which is used to abut against the inner circumferential surface of the coil to be injected with glue, and the first length of the positioning surface along the axial direction of the core shaft 1 and the second length of the positioning surface along the circumferential direction of the core shaft 1 are both below a first preset value, and the first preset value is smaller than the circumference of the core shaft 1; the sleeve 3 has a cylindrical hole 301, which is used to be sleeved on the core shaft 1, and the diameter of the cylindrical hole 301 is larger than the outer diameter of the coil to be injected with glue, and the area between the cylindrical hole 301 and the core shaft 1 defines a glue injection area, and the two ends of the glue injection area along the axial direction of the core shaft 1 respectively have a glue injection port and a glue outlet; the connecting assembly is connected to the core shaft 1 and the sleeve 3 so that the axis of the core shaft 1 is colinear with the axis of the cylindrical hole 301.

[0033] The use process of the coil glue injection tooling is as follows: insert the core shaft 1 into the coil to be injected with glue, and the positioning surfaces of each first boss 102 are all in contact with the inner circumference of the coil to be injected with glue, so that the positioning surface of the first boss 102 completes the positioning of the coil to be injected with glue, so that there is a gap for glue injection between the inner circumference of the coil to be injected with glue and the core shaft 1; the sleeve 3 is sleeved to the outside of the coil to be injected with glue through the cylindrical hole 301, and the axis of the core shaft 1 is made to be colinear with the axis of the cylindrical hole 301 through the connecting component, so that there is also a gap for glue injection between the outer circumference of the coil to be injected with glue and the sleeve 3. At this time, the coil to be injected with glue, the area between the coil to be injected with glue and the core shaft 1, and the area between the coil to be injected with glue and the cylindrical hole 301 are all located in the glue injection area. Glue is injected into the glue injection area through the glue injection port, and the glue injection work of the inner circumference and the outer circumference of the coil can be completed at the same time. The glue injection is stopped when there are no bubbles in the glue flowing out of the glue outlet, and the glue in the glue injection area is dried and solidified. It should be noted that, since the glue layer on the inner circumference of the coil is generally between 0.2mm and 0.3mm, the height of the first boss 102 also needs to be set between 0.2mm and 0.3mm, so as to ensure that the glue layer thickness on the inner circumference of the coil meets the expected requirements. After the glue liquid solidifies, the glue layer on the inner circumference of the coil has a pit at the location of the first boss 102. First, remove the sleeve 3 to separate the sleeve 3 from the coil that has been injected with glue, and then pull the core shaft 1 out of the coil that has been injected with glue. Since the height of the first boss 102 is relatively low, in the process of pulling out the core shaft 1, the first boss 102 will fall out of the pit and squeeze the glue layer on the inner circumference of the coil, causing the coil that has been injected with glue to undergo a slight elastic deformation. After the first boss 102 is completely separated from the coil, the coil that has been injected with glue will return to its original state.

[0034] The above-mentioned glue injection tooling only requires one positioning and one glue injection to complete the glue injection work on the inner circumference of the coil and the outer circumference of the coil, thereby reducing the time consumption for glue injection of the coil and improving the glue injection efficiency; since during the installation of the coil glue injection tooling, the coil is positioned only by the positioning surface of the first boss 102, the inner circumference of the coil and the outer circumference of the coil can easily achieve a relatively high coaxiality after glue injection, thereby reducing the risk of eccentricity of the rotor relative to the stator during motor operation, and further reducing the possibility of friction between the stator and the rotor, so that the motor has a relatively long service life; by limiting the first preset value, the glue can flow smoothly from the glue injection port to the glue outlet and evacuate the air in the glue injection area, reducing the risk of bubbles in the glue layer of the coil after glue injection, and relatively improving the glue injection efficiency and the glue layer quality.

[0035] In some embodiments, the surface of the mandrel 1, the surface of the first boss 102 and the surface of the cylindrical hole 301 are all provided with a release coating, so as to facilitate the removal of the sleeve 3 and the mandrel 1 after the glue is cured. The release coating can be made of materials such as polytetrafluoroethylene, polyvinylidene fluoride, and perfluoroethylene propylene copolymer.

[0036] In some embodiments, the first preset value is between 0.4 mm and 1 mm. In some embodiments, the first preset value is between 0.4 mm and 0.6 mm. Specifically, in this embodiment, the first preset value is 0.5 mm. Through the above definition, the risk of bubbles in the coil glue layer can be further reduced. In addition, the pit of the glue layer on the inner surface of the coil at the location of the first boss 102 is smaller, so the pit has little effect on the performance of the coil after the glue injection.

[0037] In some embodiments, the edge of the cross section of the first boss 102 is a smooth closed curve to prevent stress concentration at the pit position during demoulding or during the operation of the motor. It should be noted that the cross section of the first boss 102 refers to a plane figure formed by intercepting the corresponding first boss 102 with a plane perpendicular to the protruding direction of the corresponding first boss 102.

[0038] In some embodiments, more than two groups of first bosses 102 are arranged along the axis direction of the mandrel 1, and each group of first bosses 102 includes at least three first bosses 102 spaced apart along the circumferential direction of the mandrel 1. Specifically, in this embodiment, two groups of first bosses 102 are provided, and each group of first bosses 102 includes three first bosses 102. The three first bosses 102 included in each group of first bosses 102 are distributed at equal angles around the axis of the mandrel 1. Along the circumference of the mandrel 1, the first bosses 102 included in one group of first bosses 102 are staggered with the first bosses 102 included in another group of first bosses 102. By limiting the position of each first boss 102, the coil to be injected has strong stability after positioning.

[0039] In some embodiments, one end of the sleeve 3 is provided with a cylindrical groove connected to the cylindrical hole 301, and the axis of the cylindrical groove is coaxial with the axis of the cylindrical hole 301. Figure 3 As shown, the connection assembly includes a base 4, a second boss 403 is provided on one side of the base 4 for plugging into the cylindrical groove, the diameter of the second boss 403 is the same as the diameter of the cylindrical groove, one end of the core shaft 1 is fixedly connected to the second boss 403, the cross section of the second boss 403 is circular, and the axis of the core shaft 1 is coaxial with the axis of the second boss 403. Specifically, in this embodiment, the second boss 403 is integrally formed with the base 4. Since the cross sections of the cylindrical groove and the second boss 403 are both circular, a relatively high machining accuracy can be achieved in the process of machining the cylindrical groove and the second boss 403 by machine tools, so that the axis of the core shaft 1 and the axis of the cylindrical hole 301 of the sleeve 3 have a relatively high coaxiality through the cooperation of the cylindrical groove and the second boss 403, which can ensure that the inner circumference of the coil and the outer circumference of the coil can easily achieve a relatively high coaxiality after the injection of glue.

[0040] like Figure 2 and Figure 3As shown, in some embodiments, the base 4 is provided with glue outlet channels 401 and glue storage tanks 402 which are distributed successively, and the two ends of the glue outlet channels 401 are respectively connected to the glue outlet and the glue storage tank 402, and there are multiple glue outlet channels 401, and the glue storage tank 402 is used to be connected to the suction end of the vacuum pump 6. By providing multiple glue outlet channels 401, the cross-sectional area of ​​the connection part of the glue liquid near the glue injection area at the glue outlet position and the glue liquid far away from the glue injection area can be reduced, so that after the glue liquid is solidified, it is convenient to separate the glue layer near the glue injection area at the glue outlet position from the glue far away from the glue injection area, so that the core shaft 1 can be smoothly removed from the inside of the coil after the glue injection is completed; in addition, by providing the glue storage tank 402 and connecting the glue storage tank 402 to the suction end of the vacuum pump 6, the suction force of each glue outlet channel 401 can be uniform, so that the air existing in the glue injection area before the glue injection and the glue liquid injected into the glue injection area during the glue injection process can flow to the glue storage tank 402 more uniformly through each glue outlet channel 401.

[0041] like Figure 3 As shown, in some embodiments, multiple glue outlet channels 401 are distributed at equal angles around the axis of the core shaft 1, further allowing the air existing in the glue injection area before glue injection and the glue injected into the glue injection area during the glue injection process to flow into the glue storage tank 402 more evenly through each glue outlet channel 401.

[0042] Figure 5 This is a schematic diagram of the structure of the connecting sleeve 2 provided in an embodiment of the present application.

[0043] like Figure 4 and Figure 5 As shown, in some embodiments, the other end of the sleeve 3 is provided with an annular groove 302, and the axis of the annular groove 302 is coaxial with the axis of the cylindrical hole 301. The connecting assembly also includes a connecting sleeve 2, and the connecting sleeve 2 is provided with a third boss 202 and a limiting through hole 203. The cross-section of the third boss 202 is annular, and the third boss 202 and the limiting through hole 203 are coaxially arranged. The outer diameter of the third boss 202 is the same as the outer diameter of the annular groove 302, the inner diameter of the third boss 202 is the same as the inner diameter of the annular groove 302, the height of the third boss 202 is equal to or less than the height of the annular groove 302, the third boss 202 is used to be plugged into the annular groove 302, the diameter of the limiting through hole 203 is the same as the diameter of the core shaft 1, and the limiting through hole 203 is used to plug the core shaft 1. When the third boss 202 is inserted into the annular groove 302, the core shaft 1 is inserted into the limiting through hole 203. Since the axis of the annular groove 302 is coaxially arranged with the axis of the cylindrical hole 301, the coaxiality of the core shaft 1 and the cylindrical hole 301 can be further improved. In addition, since the height of the third boss 202 is equal to or less than the height of the annular groove 302, part of the end face of the connecting sleeve 2 near the injection port can abut against the end face of the sleeve 3 near the injection port, thereby relatively reducing the amount of glue overflow at the injection port.

[0044] like Figure 2 and Figure 3 As shown, in some embodiments, the core shaft 1 is provided with a glue injection groove 101, and when the sleeve 3 is sleeved on the core shaft 1, the glue injection groove 101 is connected to the glue injection port; the connecting sleeve 2 is provided with a glue injection channel 201, and when the third boss 202 is plugged into the annular groove 302, the glue injection channel 201 is connected to the glue injection groove 101, and the glue injection channel 201 is used to connect to the output end of the glue injection machine 7 or to plug the sealing plug 8. Specifically, in this embodiment, the coil glue injection tooling also includes a sealing plug 8, which is used to block the glue injection channel 201. When glue injection is required, the output end of the glue injection machine 7 is connected to the glue injection channel 201, and the glue output from the output end of the glue injection machine 7 can enter the glue injection port more smoothly through the glue injection channel 201 and the glue injection groove 101; after the glue injection is completed, the sealing plug 8 is plugged into the glue injection port to prevent the glue from flowing out of the glue injection channel 201.

[0045] Figure 6 This is a schematic structural diagram of the sealing plug 8 provided in an embodiment of the present application.

[0046] like Figure 6 As shown, in some embodiments, the sealing plug 8 includes a handle section 801 and a plug-in section 802 protruding from one side of the handle section 801, wherein the plug-in section 802 is columnar and is used to be plugged into the glue injection channel 201. By setting the handle section 801, it is convenient for staff or a robot to clamp the sealing plug 8.

[0047] In some embodiments, the difference between the diameter of the glue injection channel 201 and the diameter of the plug-in section 802 is 0.05 mm to 0.1 mm. In the process of plugging the plug-in section 802 into the glue injection channel 201, it is convenient to discharge the air and some excess glue in the glue injection channel 201. In addition, after the plug-in section 802 is fully inserted into the glue injection channel 201, the gap between the plug-in section 802 and the glue injection channel 201 is small, which can prevent the glue from flowing out along the gap.

[0048] like Figure 5 and Figure 6 As shown, in some embodiments, the outer side surface of the connecting sleeve 2 connected to the glue injection channel 201 is a cylindrical surface, and the side of the handle section 801 close to the plug-in section 802 is an arc-shaped surface. When the plug-in section 802 is fully inserted into the glue injection channel 201, the side of the handle section 801 close to the plug-in section 802 is completely attached to the connecting sleeve 2. When the glue sealing plug 8 blocks the glue injection channel 201, the glue liquid can be further prevented from flowing out along the glue injection channel 201.

[0049] like Figure 3 As shown, in some embodiments, the portion of the core shaft 1 extending out of the injection port is provided with an avoidance groove 103 extending along its own axial direction, which is used to lead out the end of the coil to be injected with glue, thereby preventing the wire ends of the coil from affecting the cooperation between the core shaft 1 and the limiting through hole 203.

[0050] Figure 7 A schematic diagram of the structure of the coil glue injection system provided in an embodiment of the present application.

[0051] like Figure 7 As shown, the embodiment of the present application further provides a coil glue injection system, including the coil glue injection tooling in the above embodiment, and also including: a glue injection machine 7, the output end of the glue injection machine 7 is connected to the glue injection port; a vacuum pump 6, the suction end of the vacuum pump 6 is connected to the glue outlet. Since the coil glue injection system includes the coil glue injection tooling in the above embodiment, it has at least all the beneficial effects brought by the above embodiment, which will not be repeated here one by one.

[0052] In some embodiments, the suction end of the vacuum pump 6 is connected to the glue storage tank 402 through a pipe 601, and at least a portion of the pipe 601 is made of transparent material, which is convenient for staff to observe whether the glue flowing into the pipe 601 contains bubbles.

[0053] In some embodiments, the output end of the glue injection machine 7 is indirectly connected to the glue injection port through the glue injection channel 201 and the glue injection groove 101, and the suction end of the vacuum pump 6 is indirectly connected to the glue outlet through the glue storage tank 402 and the glue outlet channel 401.

[0054] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A coil glue injection tool, characterized in that: include: A mandrel, the diameter of which is smaller than the inner diameter of the coil to be injected with glue; A first boss, wherein a plurality of the first bosses are all protrudingly arranged on the circumferential side of the core shaft, the side of the first boss facing away from the core shaft is a positioning surface, which is used to abut against the inner circumferential surface of the coil to be injected with glue, and a first length of the positioning surface along the axial direction of the core shaft and a second length of the positioning surface along the circumferential direction of the core shaft are both less than a first preset value, and the first preset value is less than the circumference of the core shaft; A sleeve having a cylindrical hole for sleeved onto the core shaft, wherein the diameter of the cylindrical hole is larger than the outer diameter of the coil to be injected with glue, and the area between the cylindrical hole and the core shaft defines a glue injection area, wherein the two ends of the glue injection area along the axis direction of the core shaft respectively have a glue injection port and a glue outlet; A connecting assembly is connected to the core shaft and the sleeve so that the axis of the core shaft is colinear with the axis of the cylindrical hole.

2. The coil glue injection tooling according to claim 1, characterized in that: The first preset value is between 0.4 mm and 1 mm.

3. The coil glue injection tooling according to claim 1, characterized in that: The cross-sectional edge of the first boss is a smooth closed curve.

4. The coil glue injection tooling according to claim 1, characterized in that: More than two first boss groups are arranged along the axis direction of the core shaft, and each first boss group includes at least three first bosses spaced apart and distributed along the circumference of the core shaft.

5. The coil glue injection tooling according to claim 1, characterized in that: One end of the sleeve is provided with a cylindrical groove communicating with the cylindrical hole, the axis of the cylindrical groove is coaxial with the axis of the cylindrical hole, and the connecting assembly comprises: A base, a second boss is provided on one side of the base for being inserted into the cylindrical groove, the diameter of the second boss is the same as the diameter of the cylindrical groove, one end of the core shaft is fixedly connected to the second boss, the cross-section of the second boss is circular, and the axis of the core shaft is coaxial with the axis of the second boss.

6. The coil glue injection tooling according to claim 5, characterized in that: The base is provided with glue outlet channels and glue storage tanks which are distributed successively. The two ends of the glue outlet channels are respectively connected to the glue outlet and the glue storage tank. There are multiple glue outlet channels. The glue storage tank is used to be connected to the suction end of the vacuum pump.

7. The coil glue injection tooling according to claim 5, characterized in that: The other end of the sleeve is provided with an annular groove, the axis of the annular groove is coaxial with the axis of the cylindrical hole, and the connecting assembly further comprises: A connecting sleeve is provided with a third boss and a limiting through hole. The cross section of the third boss is annular. The third boss and the limiting through hole are coaxially arranged. The outer diameter of the third boss is the same as the outer diameter of the annular groove, the inner diameter of the third boss is the same as the inner diameter of the annular groove, the height of the third boss is equal to or less than the height of the annular groove, the third boss is used to be plugged into the annular groove, the diameter of the limiting through hole is the same as the diameter of the core shaft, and the limiting through hole is used to plug the core shaft.

8. The coil glue injection tooling according to claim 7, characterized in that: The core shaft is provided with a glue injection groove, and when the sleeve is sleeved on the core shaft, the glue injection groove is connected with the glue injection port; the connecting sleeve is provided with a glue injection channel, and when the third boss is plugged into the annular groove, the glue injection channel is connected with the glue injection groove, and the glue injection channel is used to connect to the output end of the glue injection machine or to be used to plug in a sealing glue plug.

9. The coil glue injection tooling according to claim 7, characterized in that: The portion of the core shaft extending out of the glue injection port is provided with an avoidance groove extending along the axis direction thereof, for leading out the end of the coil to be injected with glue.

10. A coil glue injection system, characterized in that: The coil glue injection tooling according to any one of claims 1 to 9 further comprises: A glue injection machine, the output end of which is connected to the glue injection port; A vacuum pump, wherein the suction end of the vacuum pump is connected to the glue outlet.

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