Glue pouring separation system and method for frameless motor stator

Abstract

The invention discloses a glue pouring separation system and method for a frameless motor stator, and the system comprises a glue pouring jig which is used for accommodating a stator iron core and carrying out the glue pouring packaging of the stator iron core; the mold splitting device is used for separating the stator iron core after glue filling from the glue filling jig; the glue pouring jig comprises an upper die, a lower die and a lower die, the upper die is provided with a first positioning groove and a first forming groove, and a glue pouring through groove is formed in the bottom of the first forming groove; the lower die is provided with a second positioning groove and a second forming groove, and a wire passing through hole is formed in the bottom of the second forming groove; the core mold comprises a cylindrical sealing part, the outer diameter of the cylindrical sealing part is matched with the inner diameter of the stator iron core, and the cylindrical sealing part is used for sealing a gap between tooth boot parts of the stator iron core; the mold splitting device comprises a mounting seat, a mold splitting device and a mold splitting device, wherein the mounting seat is provided with a separation groove for placing an upper mold or a lower mold; the separation assembly comprises a plurality of ejection shafts and is used for ejecting the core mold, the stator iron core or the upper mold; the positioning assembly is used for axially limiting the upper die and / or the lower die; the problem that mold filling and demolding are difficult in the production process can be solved, and production efficiency and product quality are improved.

Description

Technical Field

[0001] This invention relates to the field of motor manufacturing technology, specifically to a glue-filling separation system and method for a frameless motor stator. Background Technology

[0002] Frameless motors, with their advantages of compact structure, high power density, and excellent transmission efficiency, are widely used in high-end manufacturing fields such as robotics, aerospace, and precision transmission. After the stator core is assembled with winding coils, potting and encapsulation is a key process to ensure the mechanical stability, electrical insulation, and environmental weather resistance of the stator structure. The quality of the potting and encapsulation process directly determines the operating accuracy, service life, and operational reliability of the frameless motor.

[0003] In existing technologies, the encapsulation process for frameless motor stators often employs simple molds and manual labor to complete the entire process of mold assembly, encapsulation, and demolding. This method has significant technical drawbacks and is no longer suitable for the large-scale, standardized production needs of high-end manufacturing. Specific problems include: 1. The mold assembly and demolding processes rely on manual operation, which is difficult and inefficient. Especially during demolding, the cured encapsulating adhesive adheres to the mold, requiring operators to use pry bars, push rods, and other tools to pry and push. This is not only labor-intensive and slow, but also time-consuming for each product, resulting in a slow overall production pace that is difficult to adapt to the pace of large-scale production. More importantly, the force and point of application during manual operation are difficult to control precisely, easily leading to errors due to excessive force. 1. Excessive force or improper application of force can cause the stator core to crack, the winding coils to be damaged, or the sealing colloid to chip, crack, or fall off, resulting in direct product scrap and a significant increase in the defect rate. 2. The demolding method is too simplistic and cannot adapt to different bonding conditions between the stator core and the mold. The bonding position and degree between the stator core and the mold naturally vary, and the core may be bonded to different parts such as the upper mold, lower mold, or core mold. Traditional manual demolding lacks a targeted separation method and can only use a uniform brute force demolding method. When faced with overly tight bonding or special bonding positions, repeated adjustments and prying are required, which not only further reduces production efficiency but also significantly increases the risk of product damage, leading to significant fluctuations in production efficiency and product quality, and further reducing production efficiency and product consistency.

[0004] The above problems seriously affect the production efficiency and product quality of frameless motor stators, and restrict the large-scale application of frameless motors in high-end manufacturing fields. Therefore, there is an urgent need for a glue separation system and method that can solve the above problems. Summary of the Invention

[0005] In view of this, the present invention addresses the technical shortcomings of existing technologies, such as difficulties in mold assembly and demolding, and low production efficiency. Its main objective is to provide a glue-separation system for frameless motor stators. This system, through a modular glue-filling fixture and a semi-automatic mold-separation device, achieves precise positioning, reliable sealing, and semi-automatic demolding of the stator core glue-filling encapsulation, solving the problem of difficult mold assembly and demolding during production, improving production efficiency and product quality, and effectively overcoming the deficiencies of existing technologies. Furthermore, the present invention provides a glue-separation method for frameless motors. Applying the aforementioned glue-separation system, through standardized operating procedures and flexible demolding strategies, it adapts to different bonding conditions between the stator core and the glue-filling fixture, enabling semi-automatic demolding and further improving production efficiency and product consistency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A frameless motor stator potting and separation system includes a potting fixture and a mold-separating device; the potting fixture is used to accommodate the stator core and pot it with glue, and the mold-separating device is used to efficiently and non-destructively separate the potted stator core from the potting fixture.

[0008] The potting fixture includes an upper mold, a lower mold, and a core mold. The upper mold has a first positioning groove and a first forming groove. The first positioning groove is used to axially position the stator core, and the first forming groove is used to form the sealant at the non-leading end of the stator core. The bottom of the first forming groove has multiple potting channels, which are injection channels for the potting adhesive. The lower mold has a second positioning groove and a second forming groove. The second positioning groove cooperates with the first positioning groove to achieve precise positioning of the stator core. The second forming groove is used to form the sealant at the lead-out end of the stator core. The bottom of the second forming groove has a through hole for the lead wire of the stator core to pass through. The core mold includes a cylindrical sealing part. The outer diameter of the sealing part is adapted to the inner diameter of the stator core. After assembly, the sealing part is embedded in the inner side of the stator core to seal the gap between the stator core tooth shoes and prevent the adhesive from leaking from the gap during potting.

[0009] The mold-separation device includes a mounting base, a separation component, and a positioning component. The mounting base has a separation groove for placing the upper mold or the lower mold. The separation groove is provided with a limiting protrusion for cooperating with the limiting grooves of the upper and lower molds to achieve precise positioning of the potting fixture within the separation groove. The separation component includes multiple ejector shafts and ejector cylinders. The multiple ejector shafts are independently controlled by the ejector cylinders. The multiple ejector shafts are used to eject the core mold, stator core, or upper mold respectively, realizing the step-by-step separation of each component of the potting fixture from the stator core. The positioning component is used to axially limit the upper mold and / or lower mold placed in the separation groove to adapt to the ejector shafts cooperating with the upper and lower molds to eject the core mold or stator core, preventing the potting fixture from shifting during the separation process and ensuring the stability of the demolding operation.

[0010] As a preferred embodiment of the present invention, the outer edges of the upper mold and the lower mold are provided with limiting grooves extending along their axial direction. The limiting grooves are adapted to the limiting protrusions in the separation groove. Through the snap-fit ​​cooperation between the protrusions and the grooves, the upper mold and the lower mold are positioned circumferentially and radially in the separation groove, so as to avoid the glue-pouring fixture from rotating or shifting during the separation process.

[0011] As a preferred embodiment of the present invention, positioning protrusions are provided on the inner sidewalls of the first positioning groove and the second positioning groove. The positioning protrusions are adapted to the positioning grooves opened on the outer sidewall of the stator core yoke. Through this concave-convex mating structure, the stator core is accurately positioned in the glue-filling fixture, preventing the stator core from being misaligned during the glue-filling process, which would lead to uneven glue filling.

[0012] As a preferred embodiment of the present invention, the core mold is made of Teflon material. Teflon material has excellent non-stick and demolding properties, which can effectively prevent the adhesive from sticking to the core mold and reduce the difficulty of demolding. Guide portions are provided at both ends of the core mold along the axial direction. The guide portions and sealing portions are integrally formed. The outer diameter of the guide portion is adapted to the inner diameter of the through hole opened in the middle of the upper and lower molds. The guide portion is used to realize the precise installation of the core mold between the upper and lower molds, ensure the coaxiality of the sealing portion and the stator core, and improve the sealing effect.

[0013] As a preferred embodiment of the present invention, the bottom of the lower mold is provided with a plurality of ejection holes, and a reserved thickness is reserved between the ejection holes and the second forming groove. The value of the reserved thickness is in the range of 0.1mm to 0.5mm. This reserved thickness can not only ensure the structural strength of the lower mold, but also allow the second ejection shaft to pass through the area and smoothly eject the stator core, thereby realizing demolding.

[0014] As a preferred embodiment of the present invention, the separation assembly includes a first ejector shaft, a second ejector shaft, a third ejector shaft, and an ejector cylinder. The first ejector shaft is used to eject the core mold, thereby separating the lower mold from the core mold. The second ejector shaft is used to eject the stator core, thereby separating the lower mold from the stator core. The third ejector shaft is used to eject the upper mold, thereby separating the upper mold from the stator core. The first ejector shaft, the second ejector shaft, and the third ejector shaft are each independently driven and controlled by an ejector cylinder. The actions of each ejector shaft are independent of each other and can be flexibly controlled according to actual demolding requirements to adapt to different bonding conditions.

[0015] As a preferred embodiment of the present invention, the positioning component includes a telescopic cylinder, a movable plate, a fixed plate, and a movable pressure block. The movable pressure block is connected to the movable plate, and the movable plate is connected to the telescopic cylinder. The movable pressure block moves horizontally under the drive of the telescopic cylinder to vertically limit and fix the upper mold or the lower mold placed in the separation groove. The fixed plate is used to guide the movement of the movable pressure block to ensure the movement accuracy of the movable pressure block, thereby ensuring the reliability of the limiting and fixing.

[0016] As a preferred embodiment of the present invention, the positioning components are provided in two sets, and the two sets of positioning components are symmetrically installed on both sides of the separation groove; the separation groove includes a first separation groove and a second separation groove, and each set of positioning components includes two movable pressure blocks, which correspond to the first separation groove and the second separation groove respectively. The two sets of positioning components cooperate to realize the lateral limiting of the glue-pouring fixture, further improving the stability of the limiting. The design of the double separation groove can perform different demolding operations at the same time, improving production efficiency.

[0017] As a preferred technical solution of the present invention, a sealing gasket is also included. The sealing gasket is made of silicone material, which has excellent elasticity and sealing properties. The sealing gasket is sleeved on the guide portions at both ends of the core mold. After assembly, the sealing gasket is squeezed by the upper mold, lower mold and core mold to achieve sealing between the core mold and the upper mold and lower mold, preventing the glue from leaking from the gap between the core mold and the mold during glue pouring, and further improving the sealing effect.

[0018] The present invention also provides a method for separating the glue from the stator of a frameless motor, applied to the glue separation system for the frameless motor stator described in any of the above claims, comprising the following steps:

[0019] S100. Installing the potting fixture: Precisely install the stator core into the preset position of the potting fixture to complete the assembly of the potting fixture and the stator core. Specific operations include: First, spray release agent on the surfaces of the upper mold, lower mold, and core mold. The release agent can effectively prevent the adhesive from sticking to the mold and reduce the difficulty of demolding. Then, pass the lead wire of the stator core through the wire through hole of the lower mold and tightly install the stator core in the second positioning groove of the lower mold, so that the end of the stator core abuts against the stepped surface formed by the second positioning groove and the second molding groove. Then, install the core mold with the sealing gasket on the inside of the stator core to ensure the coaxiality of the sealing part and the stator core. Finally, tightly install the upper mold on the end of the stator core away from the lower mold, so that the other end of the stator core abuts against the stepped surface formed by the first positioning groove and the first molding groove, to complete the overall assembly of the potting fixture.

[0020] S200, Potting and Curing: The potting compound is slowly injected into the potting fixture from the potting channel of the upper mold, so that the compound evenly fills the gap between the first forming groove and the stator core. After the injection is completed, the assembly of the potting fixture and the stator core is placed in a vacuum baking machine for pressure and heat preservation curing treatment, so that the liquid potting compound is cured to form a solid encapsulating compound. The vacuum environment can effectively avoid the generation of air bubbles in the compound, improve the potting quality and the electrical insulation performance of the product.

[0021] S300 Separation and Demolding: The cured potting fixture and stator core assembly are placed in the mold separating device. Based on the actual bonding condition between the stator core and the potting fixture, the mold separating device separates the stator core and the potting fixture.

[0022] S400, Cutting and Shaping: The stator core that has been demolded is precision cut to remove excess sealant from the surface of the stator core, so that the external dimensions and sealant thickness of the stator core meet the preset specifications, ensuring product consistency and meeting the assembly requirements of frameless motors.

[0023] The S300 step also includes the following sub-steps:

[0024] S310. The assembly is placed in the separation groove with the lower mold at the bottom. Positioning is achieved by the cooperation of the limiting protrusion and the limiting groove. The lower mold is then axially limited by the positioning component. Then, the first ejector shaft is activated to eject the core mold, so that the core mold is separated from the lower mold. At this time, the stator core may stick to either the upper mold or the lower mold. Separation is then performed accordingly.

[0025] S320. If the stator core is bonded to the upper mold, the stator core is ejected upward through the third ejector axis of the mold separating device to separate the stator core from the upper mold.

[0026] S330. If the stator core is bonded to the lower mold, the stator core is ejected upward through the second ejector axis of the mold separating device to separate the stator core from the lower mold.

[0027] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution, it has the following beneficial effects:

[0028] 1. Reduced mold assembly difficulty and improved positioning accuracy: The glue-filling fixture achieves precise positioning of the stator core by cooperating with the positioning protrusions and the positioning grooves of the stator core. At the same time, the guide part of the core mold cooperates with the through holes of the upper and lower molds to ensure the coaxiality of the core mold. The mold assembly process does not require repeated manual calibration, which reduces the difficulty of mold assembly, improves the efficiency of mold assembly and positioning accuracy, and avoids the problem of uneven glue filling caused by stator core misalignment.

[0029] 2. Automated demolding operation, reducing manual intervention: The mold splitting device achieves automated demolding by driving the ejector shaft with an ejector cylinder, replacing the traditional manual demolding method. This not only greatly reduces the difficulty of demolding, but also avoids the problem of damage to the stator core or sealing colloid caused by uneven manual operation, thus improving the safety and stability of the production process.

[0030] 3. The separation process is flexible and controllable, adaptable to different bonding conditions: The three ejection shafts of the separation component are controlled by independent ejection cylinders, which can flexibly select the demolding path according to the actual bonding condition between the stator core and the potting fixture, adapting to different scenarios where the stator core is bonded to the upper or lower mold, thus solving the problem of the single demolding method in traditional methods.

[0031] 4. Improved production efficiency and product consistency: The system of this invention achieves standardization of mold positioning, reliability of glue filling and sealing, and automation of demolding operation. At the same time, the standardization of methods and steps effectively improves the production efficiency of frameless motor stators, and significantly improves the glue filling quality and dimensional consistency of the products, making it suitable for mass production.

[0032] To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0033] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the un-glued stator core structure according to an embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of the stator core and potting fixture installation structure according to an embodiment of the present invention;

[0036] Figure 3 This is a schematic diagram of the lower mold structure according to an embodiment of the present invention;

[0037] Figure 4 This is a cross-sectional view of the stator core and the glue-filling fixture assembly structure before glue filling according to an embodiment of the present invention;

[0038] Figure 5 This is a cross-sectional view of the assembled structure of the stator core and the glue-filling fixture after glue filling according to an embodiment of the present invention;

[0039] Figure 6 This is a schematic diagram of the mold-separating device according to an embodiment of the present invention;

[0040] Figure 7 This is an embodiment of the present invention. Figure 6 Enlarged view of point A in the middle;

[0041] Figure 8 This is a schematic diagram of the installation state when separating the core mold and the lower mold in the separation and demolding step of an embodiment of the present invention;

[0042] Figure 9 This is a schematic diagram of the installation state when separating the stator core from the lower mold in the separation and demolding step of this embodiment of the invention;

[0043] Figure 10 This is a schematic diagram of the installation state when separating the stator core from the upper mold in the separation and demolding step of this embodiment of the invention;

[0044] Figure 11 This is a schematic diagram of the stator core structure after cutting in the cutting and shaping step of an embodiment of the present invention.

[0045] Explanation of reference numerals in the attached figures:

[0046] 100. Glue-pouring jig; 110. Upper mold; 111. First positioning groove; 112. First molding groove; 113. Glue-pouring through groove; 120. Lower mold; 121. Second positioning groove; 122. Second molding groove; 123. Through hole; 124. Ejector hole; 130. Core mold; 131. Sealing part; 132. Guide part; 140. Through hole; 150. Limiting groove; 160. Positioning protrusion;

[0047] 200. Mold parting device; 210. Mounting base; 211. Separation groove; 211a. First separation groove; 211b. Second separation groove; 212. Limiting protrusion; 213. First clearance through hole; 214. Second clearance through hole; 215. Third clearance through hole; 216. Clearance notch; 220. Separation assembly; 221. Ejection cylinder; 222. First ejection shaft; 223. Second ejection shaft; 224. Third ejection shaft; 230. Positioning assembly; 231. Telescopic cylinder; 232. Fixed plate; 233. Movable plate; 234. Movable pressure block;

[0048] 300, Stator core; 310, Positioning groove; 320, Lead wire; 330, Sealing colloid. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0050] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0051] Please see Figures 1 to 11 The present invention provides a frameless motor stator potting and separation system, including a potting fixture 100 and a mold separating device 200. The potting fixture 100 is used to pot and encapsulate the stator core 300 with glue, and the mold separating device 200 is used to separate the potted stator core 300 and the potting fixture 100.

[0052] The glue-pouring fixture 100 includes an upper mold 110, a lower mold 120 and a core mold 130. The upper mold 110 and the lower mold 120 have the same outer diameter, and both have a through hole 140 in the middle.

[0053] One end of the upper mold 110 is provided with an annular first positioning groove 111. The radial dimension of the first positioning groove 111 is adapted to the radial dimension of the stator core 300 for tight fitting of the stator core 300. The bottom of the first positioning groove 111 is provided with an annular first forming groove 112 for forming the non-lead end of the stator core 300. The radial thickness of the first forming groove 112 is less than the radial thickness of the stator core 300. The bottom of the first forming groove 112 is provided with a plurality of potting channels 113 that extend to the other end of the upper mold 110 as injection channels for potting adhesive.

[0054] One end of the lower mold 120 is provided with an annular second positioning groove 121. The radial dimension of the second positioning groove 121 is adapted to the radial dimension of the stator core 300 for tight fitting of the stator core 300. The bottom of the second positioning groove 121 is provided with an annular second forming groove 122 for forming the wire outlet end of the stator core 300. The radial thickness of the second forming groove 122 is less than the radial thickness of the stator core 300. The bottom of the second forming groove 122 is provided with multiple through holes 123 extending to the other end of the lower mold 120 for the lead wire 320 to pass through. Furthermore, the end of the lower mold 120 away from the second positioning groove 121 is recessed with multiple ejection holes 124. The ejection holes 124 are used to eject and separate the glued stator core 300 from the lower mold 120. The ejection holes 124 are located on the opposite side of the second forming groove 122. The reserved thickness between them is 0.1mm to 0.5mm, which not only ensures the structural strength of the lower mold 120, but also facilitates the second ejector shaft 223 to break through and achieve demolding.

[0055] Furthermore, both the upper mold 110 and the lower mold 120 have axially extending limiting grooves 150 on their outer edges, which penetrate both ends of the upper mold 110 and the lower mold 120.

[0056] Furthermore, positioning protrusions 160 are provided on the inner sidewalls of the first positioning groove 111 and the second positioning groove 121 near the outer side. The positioning protrusions 160 are adapted to the positioning grooves 310 on the outer periphery of the yoke of the stator core 300 to achieve precise positioning of the stator core 300.

[0057] The core mold 130 is made of Teflon material and includes a cylindrical sealing part 131. The outer diameter of the sealing part 131 is consistent with the inner diameter of the stator core 300. During assembly, the two axial ends of the sealing part 131 are respectively clamped between the upper mold 110 and the lower mold 120, thereby sealing the gap between two adjacent toothed shoe parts of the stator core 300 and preventing the glue from flowing out during glue pouring. Furthermore, both axial ends of the core mold 130 are provided with cylindrical guide parts 132. The guide parts 132 are coaxially arranged with the sealing part 131, and their outer diameter is adapted to the inner diameter of the through hole 140 to achieve precise installation of the core mold 130.

[0058] Furthermore, a silicone sealing gasket is fitted on the guide part 132 to improve the sealing performance between the core mold 130 and the upper mold 110 and lower mold 120, and to prevent glue leakage.

[0059] The mold-separation device 200 includes a mounting base 210, a separation component 220, and a positioning component 230.

[0060] Mounting base 210 includes an upper mounting plate and a middle mounting plate. The upper mounting plate is provided with a separation groove 211. In this embodiment, there are two separation grooves 211, namely a first separation groove 211a and a second separation groove 211b. The inner sidewalls of the first separation groove 211a and the second separation groove 211b are provided with limiting protrusions 212. The limiting protrusions 212 extend along the axial direction of the separation groove 211 and are adapted to the shape of the limiting groove 150. The middle part of the first separation groove 211a is provided with a first clearance through hole 213, and the sidewall is provided with a clearance notch 216. The clearance notch 216 is used to clear the lead wire 320 of the stator core 300. The bottom of the first separation groove 211a is also provided with a second clearance through hole 214. The bottom of the second separation groove 211b is provided with a third clearance through hole 215.

[0061] The separation assembly 220 is mounted on the middle mounting plate and includes an ejector cylinder 221, a first ejector shaft 222, a second ejector shaft 223, and a third ejector shaft 224. The ejector cylinder 221 independently controls the first ejector shaft 222, the second ejector shaft 223, and the third ejector shaft 224 to perform vertical extension and retraction movements. The first ejector shaft 222 is located directly below the first clearance through hole 213, and the diameter of the first ejector shaft 222 is smaller than the diameter of the through hole 140. The second ejector shaft 223 is located directly below the second clearance through hole 214, and when the lower mold 120 is limited and placed in the first separation groove 211a, the positions of the second clearance through hole 214 and the ejector hole 124 correspond. The third ejector shaft 224 is located directly below the third clearance through hole 215, and when the upper mold 110 is limited and placed in the second separation groove 211b, the position of the third clearance through hole 215 corresponds to the position of the potting groove 113.

[0062] The positioning assembly 230 is mounted on the upper mounting plate. The positioning assembly 230 includes a telescopic cylinder 231, a fixed plate 232, a movable plate 233, and a movable pressure block 234. The telescopic cylinder 231 is fixedly mounted on the upper mounting plate, with its telescopic shaft facing the separation groove 211. The movable plate 233 is mounted on the telescopic shaft of the telescopic cylinder 231. The fixed plate 232 is fixedly mounted between the separation groove 211 and the telescopic cylinder 231. The fixed plate 232 has a movable through hole, and the movable pressure block 234 is slidably disposed within the movable through hole. One end of the movable pressure block 234 is fixedly connected to the movable plate 233, so that it can move horizontally under the drive of the telescopic shaft of the telescopic cylinder 231; the depth of the first separation groove 211a is not less than the thickness of the upper mold 110 and the lower mold 120. The end of the movable pressure block 234 away from the movable plate 233 is the free end. After the telescopic shaft of the telescopic cylinder 231 extends, the free end moves to the top of the first separation groove 211a, so that the upper mold 110 or the lower mold 120 placed in the first separation groove 211a can be vertically limited.

[0063] Furthermore, there are two sets of positioning components 230, symmetrically installed on both sides of the separation groove 211; furthermore, each movable plate 233 is equipped with two movable pressure blocks 234, which are respectively set on the side of the first separation groove 211a and the second separation groove 211b. The depth of the second separation groove 211b is not less than the thickness of the upper mold 110, so that the upper mold 110 placed in the first separation groove 211a can be vertically limited.

[0064] The first separation groove 211a cooperates with the first ejector shaft 222 to separate the lower mold 120 from the core mold 130 and the upper mold 110, and cooperates with the second ejector shaft 223 to separate the lower mold 120 from the stator core 300 after glue filling; the second separation groove 211b cooperates with the third ejector shaft 224 to separate the upper mold 110 from the stator core 300 after glue filling.

[0065] The above system also provides a glue-filling separation method, which includes four steps: installation, glue-filling and curing, separation, and cutting. The separation method can be flexibly selected according to the bonding condition of the stator core 300. The steps are as follows:

[0066] S100, Installing the potting fixture 100: First, spray release agent onto the surfaces of the upper mold 110, lower mold 120, and core mold 130. Pass the lead wire 320 of the stator core 300 through the wire through hole 123 of the lower mold 120. Then, tightly install the stator core 300 into the second positioning groove 121 of the lower mold 120, so that the end of the stator core 300 is tightly abutted and fixed against the stepped surface formed by the second positioning groove 121 and the second forming groove 122. 704BL glue can be applied to the wire through hole 123 to prevent the potting glue from flowing out of the wire through hole 123 after potting. Seal the core mold 130... Sealing gaskets are placed on both sides of the axial edge of the core mold 131, and the core mold 130 is installed inside the stator core 300. Finally, the upper mold 110 is tightly fitted to the end of the stator core 300 away from the lower mold 120, so that the end of the stator core 300 is tightly abutted and fixed against the stepped surface formed by the first positioning groove 111 and the first forming groove 112. At this time, the sealing gaskets on both sides of the sealing part 131 of the core mold 130 are squeezed by the inner rings of the upper mold 110 and the lower mold 120, respectively, thereby further improving the sealing performance of the gap between the two adjacent toothed shoe parts of the stator core 300 and preventing the glue from flowing out during glue pouring.

[0067] S200, potting and curing: slowly inject the potting compound into the potting channel 113 to evenly fill the potting channel 113; place the assembled stator core 300 and potting fixture 100 after potting into a vacuum baking machine for pressure and heat preservation curing treatment, so that the liquid potting compound is cured to form a solid sealant 330.

[0068] S300, Separation and Demolding: The cured potting fixture 100 and stator core 300 assembly are placed in the separation groove 211. Based on the actual bonding condition between the stator core 300 and the potting fixture 100, the stator core 300 and the potting fixture 100 are separated by the mold separation device 200. The specific steps are as follows:

[0069] S310, such as Figure 8 As shown, the assembly is placed in the first separation groove 211a with the lower mold 120 below. The lower mold 120 is positioned by the first limiting protrusion 212. The telescopic cylinder 231 is activated to extend the movable pressure block 234 to axially position the lower mold 120. Then, the first ejection shaft 222 of the ejection cylinder 221 is activated to move the first ejection shaft 222 upward, passing through the first clearance through hole 213, thereby driving the core mold 130 to move upward and separate from the lower mold 120. At the same time, the sealing part 131 of the core mold 130 drives the upper mold 110 to move upward. At this time, two situations may occur: the stator core 300 is stuck to the upper mold 110 or stuck to the lower mold 120. Depending on the sticking situation of the stator core 300, the stator core 300 is demolded from the upper mold 110 or the lower mold 120 again.

[0070] S320. If the stator core 300 is bonded to the upper mold 110, first remove the core mold 130 along the axial direction away from the upper mold 110. If the core mold 130 is bonded too tightly to the stator core 300 or the upper mold 110, the upper mold 110 can be placed in the first separation groove 211a. By repeating the above steps, the core mold 130 can be separated from the stator core 300 using the first ejector shaft 222. Then, the assembly of the stator core 300 and the upper mold 110 is placed in the second separation groove 211b with the upper mold 110 at the bottom. Figure 10 As shown, the first limiting groove 150 and the second limiting protrusion 212 are used for positioning. The telescopic cylinder 231 is activated to extend the movable pressure block 234 to axially position the upper mold 110. Then, the switch of the third ejection shaft 224 of the ejection cylinder 221 is activated to move the third ejection shaft 224 upward, pass through the third clearance through hole 215 and the glue filling through groove 113, thereby driving the stator core 300 after glue filling and curing to move upward and separate from the upper mold 110.

[0071] S330, If the stator core 300 is bonded to the lower mold 120, as follows: Figure 9 As shown, the switch of the second ejection shaft 223 of the ejection cylinder 221 is activated, causing the second ejection shaft 223 to move upward, pass through the second clearance through hole 214 and the ejection hole 124, and continue to move upward after breaking through the reserved thickness area to eject the stator core 300, thereby separating the stator core 300 from the lower mold 120.

[0072] S400, Cutting and Shaping: According to the preset specifications and dimensions of the stator core 300, the excess sealant 330 on the surface of the stator core 300 is precisely cut off by a lathe so that the stator core 300 meets the preset specifications and dimensions.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A glue-dispensing system for a frameless motor stator, characterized in that, include: A potting fixture is used to hold the stator core and encapsulate it with potting compound. The mold separation device is used to separate the stator core after glue application from the glue application fixture; The glue-pouring fixture includes: The upper mold has a first positioning groove and a first molding groove, and the bottom of the first molding groove has multiple glue-filling channels; The lower mold has a second positioning groove and a second forming groove, and the bottom of the second forming groove has a wire through hole; The core mold includes a cylindrical sealing part whose outer diameter is adapted to the inner diameter of the stator core, and is used to seal the gap between the stator core tooth shoe parts. The mold-separation device includes: The mounting base is provided with a separation groove for placing the upper mold or the lower mold, and a limiting protrusion is provided in the separation groove; The separation assembly includes multiple ejector shafts, each of which is used to eject the core mold, the stator core, or the upper mold. A positioning component for axially limiting the upper mold and / or the lower mold placed within the separation groove.

2. The potting and separation system for the frameless motor stator according to claim 1, characterized in that, Both the upper mold and the lower mold have axially extending limiting grooves on their outer edges. The limiting grooves are adapted to the limiting protrusions to help position the upper mold and the lower mold within the separation grooves.

3. The glue-filling separation system for the frameless motor stator according to claim 1, characterized in that, The inner walls of the first positioning groove and the second positioning groove are provided with positioning protrusions. The positioning protrusions are used to match the positioning grooves of the stator core yoke to realize the positioning of the stator core in the glue-filling fixture.

4. The glue-dispensing system for the frameless motor stator according to claim 1, characterized in that, The core mold is made of Teflon material, and guide portions are provided at both ends of the core mold along its axial direction. The outer diameter of the guide portions is adapted to the inner diameter of the through holes opened in the middle of the upper mold and the lower mold.

5. The potting and separation system for the frameless motor stator according to claim 4, characterized in that, It also includes sealing gaskets, which are made of silicone and are fitted onto the guide portions at both ends of the core mold to improve the sealing between the core mold and the upper mold and the lower mold.

6. The potting and separation system for the frameless motor stator according to claim 1, characterized in that, The bottom of the lower mold is provided with multiple ejection holes, and a reserved thickness is maintained between the ejection holes and the second forming groove. The value of the reserved thickness ranges from 0.1 mm to 0.5 mm.

7. The glue-filling separation system for the frameless motor stator according to claim 1, characterized in that, The separation component includes: The first ejector shaft is used to eject the core mold and separate the lower mold from the core mold; The second ejector shaft is used to eject the stator core and separate the lower mold from the stator core; The third ejector shaft is used to eject the upper mold and separate the upper mold from the stator core; And an ejector cylinder, wherein the first ejector shaft, the second ejector shaft and the third ejector shaft are each independently controlled by the ejector cylinder.

8. The potting and separation system for the frameless motor stator according to claim 1, characterized in that, The positioning assembly includes a telescopic cylinder, a movable plate, a fixed plate, and a movable pressure block. The movable plate is fixedly connected to the telescopic shaft of the telescopic cylinder. One end of the movable pressure block is connected to the movable plate, and the other end is a free end for pressing. The movable pressure block passes through a movable through hole in the fixed plate. The movable pressure block moves horizontally and reciprocally under the drive of the telescopic cylinder to limit and fix the upper mold or the lower mold placed in the separation groove in the vertical direction.

9. The potting and separation system for the frameless motor stator according to claim 8, characterized in that, The positioning components are provided in two sets, and the two sets of positioning components are symmetrically installed on both sides of the separation groove; the separation groove includes a first separation groove and a second separation groove, and each set of positioning components includes two movable pressure blocks, which are respectively disposed above the openings of the first separation groove and the second separation groove.

10. A method for separating the glue from the stator of a frameless motor, applied to the glue separation system for the stator of a frameless motor as described in any one of claims 1 to 9, characterized in that, Includes the following steps: S100. Install the glue-filling fixture: Precisely install the stator core into the glue-filling fixture; S200, Potting and Curing: The potting compound is injected from the potting channel of the upper mold. After the injection is completed, the assembly is placed in a vacuum baking machine for pressure and heat preservation curing treatment, so that the liquid potting compound is cured to form a solid encapsulant. S300 Separation and Demolding: The cured potting fixture and stator core assembly are placed in the mold separating device. Based on the actual bonding condition between the stator core and the potting fixture, the mold separating device separates the stator core and the potting fixture. S400, Cutting and Shaping: The stator core that has been demolded is cut to remove excess sealant and bring the stator core to the preset size. The S300 step also includes the following steps: S310. The assembly is placed in the separation groove with the lower mold at the bottom, and the core mold is ejected upward by the first ejector of the mold separating device to achieve separation of the lower mold and the core mold. S320. If the stator core is bonded to the upper mold, the stator core is ejected upward through the third ejector axis of the mold separating device to separate the stator core from the upper mold. S330. If the stator core is bonded to the lower mold, the stator core is ejected upward through the second ejector axis of the mold separating device to separate the stator core from the lower mold.

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