Glue filling method and glue filling system for motor

Abstract

The present application relates to the technical field of magnetic levitation motors, and in particular to a method and system for glue filling for motors. In the glue filling method for motors provided in the present application, the motor includes a housing and a stator assembly, the housing is provided with a first hole for accommodating a glue injection needle, the stator assembly is defined with a second hole for accommodating a core shaft, the gap of the stator assembly is respectively connected with the bottom of the first hole and the second hole, and the glue filling method includes: the core shaft is inserted into the second hole along the axial direction of the stator assembly, and is overall matched with the gap of the second hole; the glue injection needle is extended into the bottom of the first hole, and the glue injection pressure is adjusted by a glue injection machine connected to the glue injection needle, so that the glue fills the gap of the stator assembly from bottom to top during the glue injection process; after the gap of the stator assembly is filled with glue, the stator assembly is heated to solidify the glue; after the glue is completely solidified and the stator assembly is cooled, the core shaft is removed. It solves the technical problems of low efficiency and low quality of manual glue filling.

Description

Technical Field

[0001] The present application relates to the technical field of magnetic levitation motors, and in particular to a glue filling method and glue filling system for motors. Background Art

[0002] Magnetic levitation high-speed motors have the advantages of high power density, non-contact, low noise and small size, and are increasingly widely used. At the same time, with the long-term use of motors, the operating environment of the motors is becoming increasingly harsh, and the operating temperature is getting higher and higher, which poses great challenges to the demagnetization of the motor permanent magnets and the aging of the electronic components. It is imperative to fill the motor with glue to protect the electronic components and improve the heat dissipation efficiency.

[0003] The glue used for potting motors is generally epoxy resin. Epoxy resin glue has excellent electrical insulation properties, heat dissipation, vibration and impact resistance, and waterproof and anti-corrosion properties. Its linear expansion coefficient and curing shrinkage rate are relatively small. It can meet various specific requirements through formula design and is widely used as a potting glue in the motor industry.

[0004] There are two main processes for epoxy resin potting: vacuum potting and normal potting. Amine epoxy resin is used for potting low-voltage electrical appliances, and normal potting is mostly used. Vacuum potting is mostly used for potting high-voltage electronic components with good thermal conductivity. Whether it is normal potting or vacuum potting, it can be done manually or by mechanical equipment according to the product batch and potting requirements.

[0005] However, mechanical glue pouring requires special vacuum glue pouring equipment, and the purchase, installation and maintenance costs of vacuum glue pouring equipment are high. Although manual glue pouring has low cost, is easy to change when errors occur, and has high flexibility, it has low efficiency and low glue pouring quality. Summary of the invention

[0006] The present application provides a glue filling method and glue filling system for a motor, which solves the technical problems of low efficiency and low quality of manual glue filling, and achieves the technical effect of improving glue filling efficiency and glue filling quality.

[0007] In order to achieve the above objectives, the main technical solutions adopted in this application include:

[0008] In a first aspect, an embodiment of the present application provides a method for glue pouring for a motor, the motor comprising a housing and a stator assembly, the housing being provided with a first hole for accommodating a glue injection needle, the stator assembly being defined with a second hole for accommodating a core shaft, the void of the stator assembly being respectively connected to the bottom of the first hole and the second hole, the method comprising: step S20, the core shaft being inserted into the second hole along the axial direction of the stator assembly and being gap-matched with the second hole as a whole; step S40, extending the glue injection needle into the bottom of the first hole, and adjusting the glue injection pressure by a glue injection machine connected to the glue injection needle, so that the glue fills the void of the stator assembly from bottom to top during the glue injection process; step S60, after the void of the stator assembly is filled with the glue, heating the stator assembly to solidify the glue; step S80, removing the core shaft after the glue has been solidified and the stator assembly has cooled.

[0009] The glue injection method for the motor proposed in the embodiment of the present application is to insert the mandrel into the second hole defined by the stator component along the axial direction of the stator component and match the gap with the second hole, so that during the heating of the stator component in step S60, the mandrel will not damage the stator component due to thermal expansion, and the mandrel can prevent the glue from entering the second hole defined by the stator component during the glue injection process; the glue injection needle is inserted into the bottom of the first hole, and the glue injection machine adjusts the glue injection pressure. During the glue injection process, the glue fills the gap of the stator component from bottom to top, so that it is not easy to form a glue injection dead angle in the gap of the stator component during the glue injection process, and reduces the generation of bubbles during the glue injection process, thereby improving the glue injection quality. And the glue injection amount and the glue injection speed are adjusted by adjusting the glue injection pressure by the glue injection machine, which saves time and labor, and improves the glue injection efficiency.

[0010] Optionally, before step S60, the glue injection method further includes: step S41, after a predetermined volume of the glue is injected into the gap of the stator component, the glue injection needle is taken out from the first hole, and the stator component is vacuumed. After a predetermined volume of the glue is injected into the gap of the stator component, the glue injection needle is taken out from the first hole, and the stator component is vacuumed, thereby further reducing the generation of bubbles during the glue injection process.

[0011] Optionally, before step S60, the glue injection method further includes: repeating steps S40 to S41 until the gap of the stator assembly is filled with the glue. A predetermined volume of glue is injected into the gap of the stator assembly, the glue injection needle is taken out from the first hole, and then the stator assembly is vacuumed once; after a predetermined volume of glue is injected into the gap of the stator assembly again, the glue injection needle is taken out from the first hole, the stator assembly is vacuumed once again, and this step is repeated multiple times until the gap of the stator assembly is filled with glue. By injecting glue into the gap of the stator assembly in batches and vacuuming them separately, the generation of bubbles in each glue injection step is reduced, thereby improving the glue injection quality in the gap of the stator assembly.

[0012] Optionally, before step S40, the glue pouring method further comprises: injecting the glue into a glue cartridge connected between the glue injection machine and the glue injection needle. The glue cartridge is used to store a fixed amount of glue to inject glue into the stator assembly.

[0013] Optionally, the glue injection machine adjusts the glue injection pressure by injecting air with adjustable pressure into the glue cylinder. During the glue injection process, the glue injection pressure increases as the volume of the glue injected into the gap of the stator assembly increases, resulting in a decrease in the glue injection speed. The glue injection pressure needs to be changed to ensure uniform glue injection during the glue injection process and improve the glue injection effect.

[0014] Optionally, the injection pressure is 0.2MPa-0.8MPa. The injection speed is controlled by adjusting the injection pressure.

[0015] Optionally, the length of the injection needle is greater than or equal to the depth of the first hole. The length of the injection needle is greater than or equal to the depth of the first hole, thereby ensuring that the injection needle can penetrate into the bottom of the first hole, thereby realizing the injection of glue from bottom to top in the gap of the stator assembly.

[0016] Optionally, in step S60, when the stator assembly is heated, the mandrel expands to an interference fit with the second hole. When the stator assembly is heated, the mandrel expands to an interference fit with the second hole due to heat, and the thermal expansion and contraction of the mandrel is utilized to prevent the rubber from entering the second hole. Moreover, after the mandrel is heated, the clearance fit with the second hole is changed to an interference fit, thereby reducing the damage of the mandrel to the stator assembly.

[0017] Optionally, the mandrel is made of polytetrafluoroethylene. The mandrel made of polytetrafluoroethylene has good thermal expansion and contraction properties. After the injection of glue is completed, the mandrel cools and shrinks and separates from the rubber, and the mandrel can be easily taken out from the second hole of the stator assembly; the mandrel made of polytetrafluoroethylene also has anti-sticking properties, which can reduce the adhesion between the rubber and the mandrel and the damage to the mandrel caused by adhesion with the rubber.

[0018] In a second aspect, an embodiment of the present application provides a glue pouring system, comprising: a motor, the motor comprising a housing and a stator assembly, the housing being provided with a first hole, the stator assembly being defined with a second hole, the gap of the stator assembly being respectively connected with the bottom of the first hole and the second hole; a glue pouring device, the glue pouring device comprising a core shaft, a glue injection needle and a glue injection machine, the core shaft being adapted to be accommodated in the second hole, the glue injection needle being adapted to be accommodated in the first hole, wherein when the glue pouring device pours glue into the motor, the core shaft is arranged along the axial direction of the stator assembly. Insert the second hole and make a clearance fit with the second hole as a whole; extend the glue injection needle into the bottom of the first hole, and adjust the glue injection pressure through the glue injection machine so that the glue fills the gap of the stator component from bottom to top during the glue injection process; after the gap of the stator component is filled with the glue, heat the stator component to solidify the glue; after the glue is completely solidified and the stator component is cooled, the core shaft returns to the size at room temperature, and after the core shaft is cooled, the interference fit with the second hole is changed to a clearance fit, so that the core shaft can be quickly removed.

[0019] The glue injection system proposed in the embodiment of the present application inserts the mandrel into the second hole defined by the stator assembly along the axial direction of the stator assembly and matches the gap with the second hole. During the heating process of the stator assembly, the mandrel expands due to heat and does not damage the stator assembly, and the mandrel can prevent the glue from entering the second hole defined by the stator assembly during the glue injection process; the glue injection needle is inserted into the bottom of the first hole to inject glue into the stator assembly, and the glue injection machine adjusts the glue injection speed by adjusting the glue injection pressure. During the glue injection process, the glue fills the gap of the stator assembly from bottom to top, making it difficult to form a glue injection dead angle in the gap of the stator assembly during the glue injection process, and reducing the generation of bubbles during the glue injection process, thereby improving the glue injection quality. In addition, the glue injection amount and the glue injection speed are adjusted by adjusting the glue injection pressure by the glue injection machine, which saves time and effort and improves the glue injection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a schematic diagram of the steps of an embodiment of the glue filling method of the present application;

[0022] Figure 2 This is a schematic diagram of the steps of another embodiment of the glue filling method of the present application;

[0023] Figure 3This is a schematic diagram of the structure of the glue filling system of this application;

[0024] Figure 4 This is a partial structural diagram of the glue filling system of this application;

[0025] Figure 5 This is a schematic diagram of the partial structure of the glue filling system of this application.

[0026] [Description of Reference Numerals]

[0027] 1: stator assembly; 10: housing; 11: first hole; 12: second hole; 2: core shaft; 3: glue injection needle; 4: glue cylinder; 5: glue injection machine; 51: second pipe; 52: connecting piece; 6: air compressor; 61: first pipe; 7: sealing element; 100: glue material. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0029] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0030] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0031] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0033] The term "multiple" as used in the present application refers to more than two (including two). Similarly, the term "multiple groups" refers to more than two groups (including two groups), and the term "multiple sheets" refers to more than two sheets (including two sheets).

[0034] Since epoxy resin glue has excellent electrical insulation properties, heat dissipation, vibration and impact resistance, and waterproof and anti-corrosion properties, and its linear expansion coefficient and curing shrinkage rate are relatively small, it can be designed through formulas to meet various specific requirements. Therefore, epoxy resin glue can be used as a potting glue in the motor industry.

[0035] Most epoxy resin glues are two-component glues, A and B. After heating and stirring, they are mixed in a specified proportion and poured into the motor stator assembly in a liquid state. During or after the pouring process, vacuum can be drawn. Finally, the glue is solidified and fixed, thereby protecting the motor stator assembly and improving the thermal conductivity. Due to the high viscosity of the glue, the installation and maintenance costs of using vacuum mechanical equipment for glue injection are high, while the efficiency of using manual needle tube glue injection is low. In addition, the commonly used glue injection method is to insert a metal core shaft into the stator assembly, and the outer cylindrical surface of the metal core shaft is zero-clearance matched with the inner cylindrical surface of the stator assembly. Then, a sealing bottom plate is set at the bottom of the stator assembly, and an opening is opened at the upper part of the stator assembly for glue injection. The liquid glue flows to every corner of the stator assembly under the action of gravity. However, the glue injection amount and injection speed in this glue injection method are difficult to control, the glue injection quality is not high, and the core shaft will be heated and expanded during the glue injection process, causing damage to the stator assembly. In order to reduce the glue injection cost and improve the glue injection efficiency and glue injection quality, a new glue injection method for motors is needed.

[0036] In addition, in the related art, a mold release agent needs to be applied to the metal mandrel before glue pouring. However, after the glue pouring is completed, the solidified glue will still cling to the mandrel, making it difficult for the mandrel to fall out. Therefore, a mandrel that is easy to remove from the glue is also needed.

[0037] First, refer to Figures 1 to 5 The embodiment of the present application provides a method for glue pouring for a motor, the motor comprising a housing 10 and a stator assembly 1, the housing 10 being provided with a first hole 11 for accommodating a glue injection needle 3, the stator assembly 1 being defined with a second hole 12 for accommodating a core shaft 2, and the void of the stator assembly 1 being communicated with the bottom of the first hole 11 and the second hole 12 respectively. It should be understood that the first hole 11 provided on the housing 10 for accommodating the glue injection needle 3 extends into the interior of the stator assembly 1 and is communicated with the void of the stator assembly 1, and the second hole 12 for accommodating the core shaft 2 is communicated with the void of the stator assembly 1, that is, the first hole 11 is also communicated with the second hole 12. The glue pouring method comprises:

[0038] Step S20, the core shaft 2 is inserted into the second hole 12 along the axial direction of the stator assembly 1, and the core shaft 2 is loosely matched with the second hole 12 as a whole. The core shaft 2 is inserted into the second hole 12 during the glue injection process to prevent the glue 100 from entering the second hole 12. Specifically, the core shaft 2 is loosely matched with the second hole 12 of the stator assembly 1, and the gap between the core shaft 2 and the inner wall of the second hole 12 is 0.1mm-0.2mm. The core shaft 2 and the second hole 12 are loosely matched, so that in the subsequent addition process, the expansion of the core shaft 2 will not damage the stator assembly 1.

[0039] Step S40, the glue injection needle 3 is inserted into the bottom of the first hole 11, and the glue injection pressure is adjusted by the glue injection machine 5 connected to the glue injection needle 3, so that the glue 100 fills the gap of the stator component 1 from bottom to top during the glue injection process. The glue injection needle 3 penetrates into the bottom of the first hole 11, and the glue injection pressure is adjusted by the glue injection machine 5 connected to the glue injection needle 3, thereby adjusting the glue injection speed, so that the glue 100 fills the gap of the stator component 1 from bottom to top during the glue injection process, and the glue injection speed is uniform.

[0040] Step S60, after the gaps of the stator assembly 1 are filled with the glue 100, the stator assembly 1 is heated to solidify the glue 100. After the gaps of the stator assembly 1 are filled with the glue 100, the stator assembly 1 is heated to promote the solidification of the glue 100.

[0041] Step S80, after the adhesive 100 is completely cured and the stator assembly 1 is cooled, the core shaft 2 is taken out. After the stator assembly 1 is cooled, the core shaft 2 shrinks and can be easily removed from the stator assembly 1.

[0042] The glue filling method for the motor proposed in the embodiment of the present application is to insert the core shaft 2 into the second hole 12 defined by the stator component 1 along the axial direction of the stator component 1, and to match the second hole 12 with a gap, so that in the process of heating the stator component 1 in step S60, the core shaft 2 will not damage the stator component 1 due to thermal expansion, and the core shaft 2 can block the glue 100 from entering the second hole 12 defined by the stator component 1 during the glue filling process; the glue injection needle 3 is inserted into the bottom of the first hole 11, and the glue injection machine 5 adjusts the glue injection pressure. During the glue filling process, the glue 100 fills the gap of the stator component 1 from bottom to top, so that it is not easy to form a glue filling dead angle in the gap of the stator component 1 during the glue filling process, and the generation of bubbles during the glue filling process is reduced, thereby improving the glue filling quality. And the glue filling amount and glue filling speed are adjusted by adjusting the glue filling pressure by the glue injection machine 5, which saves time and labor, and improves the glue filling efficiency.

[0043] Optionally, before step S60, the glue filling method further includes: step S41, after a predetermined volume of glue 100 is injected into the gap of the stator component 1, the glue injection needle 3 is taken out from the first hole 11, and the stator component 1 is vacuumed. After a predetermined volume of glue 100 is injected into the gap of the stator component 1, the glue injection needle 3 is taken out from the first hole 11, and the stator component 1 is vacuumed, so as to further reduce the generation of bubbles during the glue injection process. It should be understood that the predetermined volume can be any volume such as 1 / 3, 1 / 4 or 1 / 2 of the gap volume of the stator component 1, as long as the stator component 1 can be vacuumed after the predetermined volume of glue 100 is injected into the gap of the stator component 1, so as to reduce the bubbles generated during the glue injection process.

[0044] Optionally, before step S60, the glue filling method further includes: repeating steps S40 to S41 until the gap of the stator component 1 is filled with glue 100. A predetermined volume of glue 100 is injected into the gap of the stator component 1, and the glue injection needle 3 is taken out from the first hole 11, and then the stator component 1 is vacuumed once; after the predetermined volume of glue 100 is injected into the gap of the stator component 1 again, the glue injection needle 3 is taken out from the first hole 11, and the stator component 1 is vacuumed once again, and this step is repeated multiple times until the gap of the stator component 1 is filled with glue 100. By injecting glue into the gap of the stator component 1 in batches and performing the vacuuming process respectively, the generation of bubbles in each glue injection step is reduced, thereby improving the glue injection quality in the gap of the stator component 1. And the glue injection amount and the glue injection speed are adjusted by adjusting the glue injection pressure by the glue injection machine 5, which saves time and labor, and improves the glue injection efficiency.

[0045] In an optional embodiment, when the glue 100 of 1 / 3 volume of the gap volume of the stator component 1 is injected into the gap of the stator component 1, the glue injection needle 3 is taken out and the stator component 1 is vacuumed; the glue injection needle 3 is inserted into the first hole 11 of the stator component 1 for the second time, and the glue 100 of 1 / 3 volume of the gap volume of the stator component 1 is injected for the second time, and the glue injection needle 3 is taken out and the stator component 1 is vacuumed for the second time, at which time the gap of the stator component has 2 / 3 volume of the gap volume of the stator component 1; the glue injection needle 3 is inserted into the first hole 11 of the stator component 1 for the third time, and the glue 100 of 1 / 3 volume of the gap volume of the stator component 1 is injected for the third time, and the glue injection needle 3 is taken out and the stator component 1 is vacuumed for the third time, at which time the gap of the stator component 1 is filled with the glue 100. Then, the stator component 1 is heated to solidify the glue 100 in the gap of the stator component 1.

[0046] Optionally, before step S40, the glue filling method further includes: injecting glue 100 into the glue cylinder 4 connected between the glue injection machine 5 and the glue injection needle 3. The glue cylinder 4 has a scale for storing a fixed amount of glue 100 to inject glue into the stator assembly 1, and the glue 100 injected into the gap of the stator assembly 1 can also be obtained according to the scale number of the glue cylinder 4. The glue 100 in the glue cylinder 4 is injected into the gap of the stator assembly 1 through the glue injection needle 3. Since the viscosity of the glue 100 is relatively high, the glue injection machine 5 needs to apply pressure to it so that the glue 100 can enter the gap of the stator assembly 1 along the glue injection needle 3.

[0047] Optionally, the glue injection machine 5 adjusts the glue injection pressure by injecting air with adjustable pressure into the glue cylinder 4. During the glue injection process, as the volume of the glue 100 injected into the stator assembly 1 increases, the pressure exerted by the upper layer of glue 100 on the lower layer of glue 100 increases, and the glue injection speed decreases. In other words, the glue injection pressure increases with the increase in the volume of the glue 100 injected into the gap of the stator assembly 1. If you want to maintain a uniform glue injection speed, you need to increase the glue injection pressure to ensure that the glue injection speed during the glue injection process remains uniform, thereby ensuring uniform glue injection and improving the glue injection effect.

[0048] In an optional embodiment, the amount of the glue 100 filled in the gap of the stator component 1 can be determined by reading the scale of the glue cylinder 4, and the glue injection pressure is adjusted according to the amount of the glue 100 filled in the gap of the stator component 1, thereby adjusting the glue injection speed. Compared with manual glue injection, it saves time and labor, and improves the glue injection efficiency.

[0049] Optionally, the injection pressure is 0.2MPa-0.8MPa. The injection speed and injection amount are controlled by adjusting the injection pressure. When the speed of the glue 100 flowing out of the injection needle 3 is too fast, the injection pressure is reduced; when the speed of the glue flowing out of the injection needle 3 decreases, the injection pressure is increased.

[0050] Optionally, the length of the injection needle 3 is greater than or equal to the depth of the first hole 11. The length of the injection needle 3 is greater than or equal to the depth of the first hole 11, thereby ensuring that the injection needle 3 can penetrate into the bottom of the first hole 11, thereby realizing the injection of glue from bottom to top in the gap of the stator assembly 1.

[0051] It should be understood that, during the glue injection process, the depth of the upper surface of the glue 100 in the gap of the stator component 1 from the upper surface of the housing 10 can be determined according to the volume of the glue 100 in the gap of the stator component 1 and the height of the corresponding volume of the glue 100 in the stator component 1, thereby determining the length of the glue injection needle 3. In other words, the depth of the first hole 11 decreases as the gap of the stator component 1 is filled with the glue 100, and the length of the glue injection needle 3 can be determined according to the depth of the first hole 11.

[0052] In another optional embodiment, during the glue injection process, there should be a gap between the lowermost end of the glue injection needle 3 and the bottom wall of the stator assembly 1 or the upper surface of the glue 100 in the gap of the stator assembly 1, so that the glue 100 in the glue injection needle 3 can easily flow out. The gap can be 2mm-5mm.

[0053] Optionally, in step S60, when the stator assembly 1 is heated, the core shaft 2 expands to an interference fit with the second hole 12. When the stator assembly 1 is heated, the core shaft 2 expands to an interference fit with the second hole 12 due to the heat, and the core shaft 2 is used to expand and contract with heat to achieve the purpose of blocking the rubber material 100 from entering the second hole 12. After the core shaft 2 is heated, the clearance fit with the second hole 12 is changed to an interference fit, thereby reducing the damage of the core shaft 2 to the stator assembly 1. After the stator assembly 1 is cooled, the core shaft 2 returns to the size at room temperature. After the core shaft 2 is cooled, the interference fit with the second hole 12 is changed to a clearance fit, and the core shaft 2 can be quickly removed from the stator assembly 1.

[0054] Optionally, the material of the core shaft 2 is polytetrafluoroethylene. The core shaft 2 made of polytetrafluoroethylene has good thermal expansion and contraction performance. After the glue injection is completed, the core shaft 2 cools and shrinks and separates from the rubber material 100, and the core shaft 2 can be easily taken out from the second hole 12 of the stator assembly 1; the core shaft 2 made of polytetrafluoroethylene also has anti-sticking performance, which can reduce the adhesion between the rubber material 100 and the core shaft 2 and the damage caused by the adhesion of the core shaft 2 with the rubber material 100.

[0055] It should be understood that the core shaft 2 can also be made of other materials with thermal expansion and contraction and non-stick properties, such as polyoxymethylene and nylon.

[0056] Second, reference Figures 3 to 5The embodiment of the present application provides a glue pouring system, the glue pouring system includes a motor, the motor includes a housing 10 and a stator assembly 1, the housing 10 is provided with a first hole 11, the stator assembly 1 is defined with a second hole 12, the gap of the stator assembly 1 is respectively connected with the bottom of the first hole 11 and the second hole 12; a glue pouring device, the glue pouring device includes a core shaft 2, a glue injection needle 3 and a glue injection machine 5, the core shaft 2 is suitable for being accommodated in the second hole 12, the glue injection needle 3 is suitable for being accommodated in the first hole 11, wherein, when the glue pouring device pours glue into the motor, the core shaft 2 moves along the stator The component 1 is inserted axially into the second hole 12 and is loosely fitted with the second hole 12 as a whole; the glue injection needle 3 is inserted into the bottom of the first hole 11, and the glue injection pressure is adjusted by the glue injection machine 5 so that the glue 100 fills the gap of the stator component 1 from bottom to top during the glue injection process; after the gap of the stator component 1 is filled with the glue 100, the stator component 1 is heated to solidify the glue 100; after the glue 100 is completely solidified and the stator component 1 is cooled, the core shaft shrinks until the interference fit with the second hole changes to a loose fit, and the core shaft 2 is taken out.

[0057] The glue injection system proposed in the embodiment of the present application inserts the core shaft 2 into the second hole 12 defined by the stator component 1 along the axial direction of the stator component 1, and is in clearance fit with the second hole 12, so that the core shaft 2 blocks the glue 100 from entering the second hole 12 defined by the stator component 1 during the glue injection process; the glue injection needle 3 is inserted into the bottom of the first hole 11 to inject the glue 100 into the stator component 1, and the glue injection machine 5 adjusts the glue injection speed by adjusting the glue injection pressure. During the glue injection process, the glue 100 fills the gap of the stator component 1 from bottom to top, so that it is not easy to form a glue injection dead angle in the gap of the stator component 1 during the glue injection process, and reduces the generation of bubbles during the glue injection process, thereby improving the glue injection quality. In addition, the glue injection amount and the glue injection speed are adjusted by adjusting the glue injection pressure by the glue injection machine 5, which saves time and effort, and improves the glue injection efficiency.

[0058] When the stator assembly 1 is heated, the core shaft 2 expands due to the heat, and the core shaft 2 changes from a clearance fit with the second hole 12 to an interference fit with the second hole 12. The thermal expansion and contraction performance of the core shaft 2 is utilized to achieve the purpose of preventing the rubber material 100 from entering the second hole 12, and reduce the damage of the core shaft 2 to the stator assembly 1. After the stator assembly 1 is cooled, the core shaft 2 returns to the size at room temperature, and after the core shaft 2 is cooled, the interference fit with the second hole 12 is changed to a clearance fit, and the core shaft 2 can be quickly removed from the stator assembly 1.

[0059] In an embodiment of the present application, the glue filling device also includes an air compressor 6, which is connected to the glue injection machine 5 through a first tube 61, and the first tube 61 is connected to the air compressor 6 and the glue injection machine 5 through threads or other standard parts such as quick-connect connectors. The glue injection machine 5 is connected to the glue cylinder 4 through a first connecting portion, and the first connecting portion includes a second tube 51 and a connector 52, one end of the second tube 51 is connected to the glue injection machine 5, and the other end of the second tube 51 is connected to one side of the connector 52, wherein the second tube 51 is connected to the glue injection machine 5 through threads or other standard parts such as quick-connect connectors, the second tube 51 is connected to the glue cylinder 4 through pipe threads, etc., and the glue cylinder 4 is connected to the glue injection needle 3 through buckles or standard pipe threads, etc., for easy connection and assembly. The second tube 51 is fixedly connected to the connector 52, and the outer peripheral surface of the connector 52 has a notched plane, which is convenient for a wrench to tighten or fix the connector 52 on the glue cylinder 4. One end of the glue injection needle 3 connected to the glue cylinder 4 has a notched surface, which is convenient for a wrench to tighten the glue injection needle 3 onto the glue cylinder 4.

[0060] The other side of the connecting member 52 has an abutting surface abutting against the end surface of the rubber sleeve 4. The abutting surface has a connecting end extending away from the abutting surface, and the connecting end is threadedly connected to the inner wall of the rubber sleeve 4. A sealing member 7 is provided between the abutting surface and the end surface of the rubber sleeve 4.

[0061] The air compressor 6 provides air pressure to the glue injector 5. The glue injector 5 has a pressure regulating valve. The glue injector 5 controls the outflow speed of the glue material 100 in the glue cylinder 4 by controlling the air pressure in the second tube 51. The air pressure in the second tube 51 affects the flow rate of the glue material 100 in the glue cylinder 4, thereby affecting the glue injection effect. Optionally, the glue injector 5 can also control the on and off of the time relay through a program to achieve the purpose of controlling the glue injection time, thereby achieving the purpose of accurately controlling the glue injection amount and glue injection speed.

[0062] In the embodiment of the present application, the first tube 61 and the second tube 51 are air-conducting hoses, the air compressor 6 is connected to the glue injection machine 5 through the first tube 61, and the glue injection machine 5 is connected to the glue cylinder 4 through the second tube 51. The glue injection machine 5 controls the glue injection pressure and injection time, thereby achieving the purpose of controlling the glue injection amount, injection time and injection speed. The glue cylinder 4 has a scale, and the calculated weight of the glue 100 is injected into the glue cylinder 4 before filling the glue.

[0063] The specific glue pouring steps are: preheat glue A and glue B respectively, and mix them in proportion to form glue material 100 for glue injection, weigh a predetermined weight of glue material 100 and inject it into the glue barrel 4, the second tube 51 is connected to the connecting piece 52, the connecting piece 52 is connected to the upper end of the glue barrel 4 through a pipe thread, and the glue injection needle 3 is connected to the lower end of the glue barrel 4 through a pipe thread. Then, insert the glue injection needle 3 into the lower end of the stator assembly 1, turn on the air compressor 6 and the glue injection machine 5, and adjust the glue injection pressure and injection time through the glue injection machine 5. The glue injection pressure is generally 0.2MPa-0.8MPa. The glue injection time is generally determined by the glue injection capacity and the capacity of the glue barrel 4. The glue injection pressure pushes the glue material 100 in the glue barrel 4 to flow into the lower end of the stator assembly 1, filling the gap of the stator assembly 1 from bottom to top. Steps S40 to S41 are repeated multiple times until the gaps in the stator assembly 1 are filled with the adhesive 100 , and then the stator assembly 1 is heated to promote the curing of the adhesive 100 in the gaps in the stator assembly 1 . After the stator assembly 1 is cooled, the core shaft 2 is taken out.

[0064] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity 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, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0065] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0066] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

[0067] Although the embodiments of the present application have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A method for glue filling of a motor, characterized in that: The glue filling device comprises a core shaft, a glue injection needle, an air compressor, a glue injection machine and a glue cylinder, the air compressor is connected to the glue injection machine through a first tube, the glue injection machine is connected to the glue cylinder through a first connecting part, the first connecting part comprises a second tube and a connecting piece, the connecting piece is arranged on the glue cylinder, one end of the second tube is connected to the glue injection machine, the other end of the second tube is connected to the connecting piece, the air compressor provides air pressure to the glue injection machine, the glue injection machine has a pressure regulating valve, the motor comprises a housing and a stator assembly, the housing is provided with a first hole for accommodating the glue injection needle, the stator assembly is defined with a second hole for accommodating the core shaft, the gap of the stator assembly is respectively connected with the bottom of the first hole and the second hole, and the glue filling method comprises: Step S20, the core shaft is inserted into the second hole along the axial direction of the stator assembly, and is loosely matched with the second hole as a whole, and glue is injected into the glue cylinder connected between the glue injection machine and the glue injection needle; Step S40, inserting the glue injection needle into the bottom of the first hole, and adjusting the glue injection pressure through a glue injection machine connected to the glue injection needle, so that the glue fills the gap of the stator assembly from bottom to top during the glue injection process, wherein the glue injection machine injects pressure-adjustable air into the glue cylinder through the second tube, and the glue injection pressure increases with the increase of the volume of the glue injected into the gap of the stator assembly; Step S60, after the gaps in the stator assembly are filled with the adhesive, heating the stator assembly to solidify the adhesive; Step S80, after the rubber material is completely cured and the stator assembly is cooled, the core shaft is taken out.

2. The glue pouring method for a motor according to claim 1, characterized in that: Before step S60, the glue pouring method further includes: Step S41, after a predetermined volume of the glue is injected into the gap of the stator assembly, the glue injection needle is taken out from the first hole, and the stator assembly is vacuumed.

3. The glue pouring method for a motor according to claim 2, characterized in that: Before step S60, the glue pouring method further includes: Steps S40 to S41 are repeated until the gaps in the stator assembly are filled with the rubber material.

4. The glue pouring method for a motor according to claim 1, characterized in that: The injection pressure is 0.2MPa-0.8MPa.

5. The glue pouring method for a motor according to claim 1, characterized in that: The length of the glue injection needle is greater than or equal to the depth of the first hole.

6. The glue pouring method for a motor according to claim 1, characterized in that: In step S60, when the stator assembly is heated, the core shaft expands to an interference fit with the second hole.

7. The glue pouring method for a motor according to claim 1, characterized in that: The material of the core shaft is polytetrafluoroethylene.

8. A glue filling system, characterized in that: include: A motor, the motor comprising a housing and a stator assembly, the housing being provided with a first hole, the stator assembly being defined with a second hole, and a gap of the stator assembly being respectively connected with a bottom of the first hole and the second hole; The glue pouring device comprises a core shaft, a glue injection needle, a glue injection machine, an air compressor and a glue cylinder. The air compressor is connected to the glue injection machine through a first tube. The glue injection machine is connected to the glue cylinder through a first connecting part. The first connecting part comprises a second tube and a connecting piece. The connecting piece is arranged on the glue cylinder. One end of the second tube is connected to the glue injection machine, and the other end of the second tube is connected to the connecting piece. The air compressor provides air pressure to the glue injection machine. The glue injection machine has a pressure regulating valve. The core shaft is suitable for being accommodated in the second hole. The glue injection needle is suitable for being accommodated in the first hole. When the glue pouring device pours glue into the motor, The core shaft is inserted into the second hole along the axial direction of the stator assembly and is loosely matched with the second hole as a whole, so as to inject glue into the glue cylinder connected between the glue injection machine and the glue injection needle; Insert the glue injection needle into the bottom of the first hole, and adjust the glue injection pressure by the glue injection machine so that the glue fills the gap of the stator assembly from bottom to top during the glue injection process, wherein the glue injection machine injects pressure-adjustable air into the glue cylinder through the second tube, and the glue injection pressure increases as the volume of the glue injected into the gap of the stator assembly increases; After the gap of the stator component is filled with the rubber, the stator component is heated to solidify the rubber; After the rubber material is completely cured and the stator assembly is cooled, the mandrel is shrunk until the interference fit with the second hole changes to a clearance fit, and the mandrel is taken out.

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