A glue-applying fixture for slotless stators of frameless torque motors

Abstract

This utility model discloses a glue-filling fixture for a slotless stator of a frameless torque motor, comprising a glue-filling cover plate, a glue-filling base, and fastening bolts. The glue-filling cover plate, glue-filling base, and fastening bolts are coaxially arranged. The glue-filling cover plate has an annular first positioning groove, and a first shaping groove is formed at the bottom of the first positioning groove. The glue-filling base has an annular second positioning groove, and a second shaping groove is formed at the bottom of the second positioning groove. The first positioning groove and the second positioning groove are arranged opposite to each other, and the radial width of both the first positioning groove and the second positioning groove is not less than the radial width of the stator core. The glue-filling cover plate has a glue-filling hole that communicates with the first shaping groove. The glue-filling base has a wire outlet hole that communicates with the second shaping groove. The fastening bolts are used to fix the stator core of the frameless torque motor between the glue-filling cover plate and the glue-filling base, and to clamp the edges of the upper and lower ends of the stator core at the bottom of the first positioning groove and the second positioning groove.

Description

Technical Field

[0001] This utility model relates to the field of motor packaging technology, and in particular to a potting fixture for slotless stators of frameless torque motors. Background Technology

[0002] Frameless torque motors are permanent magnet synchronous motors that eliminate the traditional motor housing, bearings, and end covers, retaining only the stator and rotor as the two core components. Their design achieves deep integration of the motor with the equipment's mechanical structure. Due to the elimination of supporting structures like the housing, potting has become a crucial step in the stator's production process to ensure structural strength, insulation performance, and heat dissipation efficiency. During potting, epoxy resin and other adhesive materials are evenly filled into the gap between the stator core and the windings. After the adhesive cures, it forms an integrated structure that not only fixes the windings to prevent displacement during high-speed operation but also prevents the intrusion of moisture, dust, and other impurities. Simultaneously, the adhesive's thermal conductivity accelerates heat dissipation from the windings, giving the motor stator excellent thermal conductivity and insulation. Existing potting fixtures for slotless stators in frameless torque motors are complex, with numerous parts, making assembly extremely inconvenient and resulting in low production efficiency. Utility Model Content

[0003] In view of this, the present invention addresses the deficiencies of the existing technology and its main purpose is to provide a glue-pouring tooling for the slotless stator of a frameless torque motor. It has a simple structure, is easy and quick to install, and can effectively improve assembly and production efficiency.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A glue-filling fixture for a slotless stator of a frameless torque motor is characterized by comprising a glue-filling cover plate, a glue-filling base, and fastening bolts. The glue-filling cover plate, the glue-filling base, and the fastening bolts are coaxially arranged. The glue-filling cover plate has an annular first positioning groove, and a first shaping groove is formed at the bottom of the first positioning groove. The glue-filling base has an annular second positioning groove, and a second shaping groove is formed at the bottom of the second positioning groove. The first positioning groove and the second positioning groove are opposite to each other, and the radial width of both the first positioning groove and the second positioning groove is not less than the radial width of the stator core. The glue-filling cover plate has a glue-filling hole that communicates with the first shaping groove. The glue-filling base has a wire outlet hole that communicates with the second shaping groove. The fastening bolts are used to fix the stator core of the frameless torque motor to the glue-filling cover plate and the glue-filling base, and to clamp the edges of the upper and lower ends of the stator core to the bottom of the first positioning groove and the second positioning groove.

[0006] As a preferred embodiment, the second shaping groove includes a receiving groove, which is disposed on the side of the second shaping groove away from the second positioning groove. One side of the receiving groove is connected to the second positioning groove, and the other side is connected to the outlet hole.

[0007] As a preferred embodiment, an outer sealing ring and an inner sealing ring are respectively provided on the inner walls on both sides of the bottom of the receiving groove. The diameter of the outer sealing ring is larger than the diameter of the inner sealing ring, and the distance between the outer sealing ring and the inner sealing ring is smaller than the radial width of the circuit board.

[0008] As a preferred embodiment, the inner walls on both sides of the bottom of the receiving groove are respectively provided with an outer mounting groove and an inner mounting groove, the outer sealing ring is disposed in the outer mounting groove, and the inner sealing ring is disposed in the inner mounting groove.

[0009] As a preferred embodiment, there are multiple glue-filling holes, which are evenly distributed on the glue-filling cover plate.

[0010] As a preferred embodiment, the glue-filling cover plate is provided with a connecting through hole, and the glue-filling base is provided with an internal threaded hole. The connecting through hole and the internal threaded hole are coaxially arranged with the glue-filling cover plate. The fastening bolt includes a connecting nut portion, a connecting portion and a threaded portion in sequence. The threaded portion is adapted to the internal threaded hole, and the diameter of the nut portion is larger than the diameter of the connecting through hole, and the diameter of the connecting portion is not smaller than the diameter of the threaded portion.

[0011] As a preferred embodiment, the openings of the first positioning groove and the second positioning groove are chamfered.

[0012] As a preferred embodiment, the glue-filling cover plate and / or the glue-filling base are provided with ejector screw holes.

[0013] Compared with the prior art, this utility model has significant advantages and beneficial effects. Specifically, as can be seen from the above technical solution, it mainly uses fastening bolts to fix the glue-filling cover plate and glue-filling base, so that the stator core is tightly clamped between the first positioning groove and the second positioning groove. The two ends of the coil are respectively housed in the first shaping groove and the second shaping groove. The shaping glue is poured into the glue-filling hole to fill the stator core. Its structure is simple, and the installation is convenient and quick. It is suitable for stator cores without slots. It eliminates the inner core designed by traditional tooling to avoid glue leakage at the stator slot. Furthermore, by using a single fastening bolt to fix the stator core, it reduces assembly steps and assembly difficulty, effectively improves assembly and production efficiency, and further reduces production costs.

[0014] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the assembly structure of an embodiment of the present utility model;

[0016] Figure 2 This is a schematic diagram of the assembly structure from another perspective of an embodiment of the present utility model;

[0017] Figure 3 This is a cross-sectional view of the assembly structure of an embodiment of this utility model;

[0018] Figure 4 This is a cross-sectional view of the assembly structure from another perspective of an embodiment of this utility model;

[0019] Figure 5 This is an exploded structural cross-sectional view of an embodiment of the present utility model;

[0020] Figure 6 This is an exploded structural cross-sectional view from another perspective of an embodiment of this utility model;

[0021] Figure 7 This is a schematic diagram of the un-glued stator core structure according to an embodiment of the present invention;

[0022] Figure 8 This is a schematic diagram of the glued stator core structure according to an embodiment of the present invention.

[0023] Explanation of reference numerals in the attached figures:

[0024] 100. Glue filling cover plate; 110. First positioning groove; 111. First step; 120. First shaping groove; 130. Glue filling hole; 140. Connecting through hole; 150. Ejection screw hole;

[0025] 200. Glue potting base; 210. Second positioning groove; 211. Second step; 220. Second shaping groove; 230. Cable outlet hole; 240. Receiving groove; 241. External mounting groove; 242. Internal mounting groove; 250. External sealing ring; 260. Internal sealing ring; 270. Internal threaded hole;

[0026] 300. Fastening bolt; 310. Nut portion; 320. Connecting part; 330. Threaded part;

[0027] 400. Stator core; 410. Circuit board. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model 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 of the present utility model and are not intended to limit the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0029] 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.

[0030] Please see Figures 1 to 8This invention provides a glue-filling fixture for a slotless stator of a frameless torque motor, comprising a glue-filling cover plate 100, a glue-filling base 200, and fastening bolts 300. The glue-filling cover plate 100, the glue-filling base 200, and the fastening bolts 300 are coaxially arranged. A first annular positioning groove 110 is formed on one side of the glue-filling cover plate 100, and a first shaping groove 120 is formed at the bottom of the first positioning groove 110, completely covering the coil at the non-leading end of the stator core 400. A second annular positioning groove 210 is formed on the side of the glue-filling base 200 near the first positioning groove 110, and a second shaping groove 220 is formed at the bottom of the second positioning groove 210, completely covering the coil at the leading end of the stator core 400. The first positioning groove 110 and the second positioning groove 210 are coaxial and opposite to each other. The radial width of the first positioning groove 110 and the second positioning groove 210 is slightly larger than the radial width of the stator core 400. The glue filling cover plate 100 is provided with a glue filling hole 130, which is connected to the first shaping groove 120 and penetrates the surface of the glue filling cover plate 100. The glue filling base 200 is provided with a wire outlet hole 230, which is connected to the second shaping groove 220 and penetrates the surface of the glue filling base 200. The fastening bolt 300 is used to fix the stator core 400 of the frameless torque motor between the glue filling cover plate 100 and the glue filling base 200, and to clamp the upper and lower edges of the stator core 400 at the bottom of the first positioning groove 110 and the second positioning groove 210. The radial width of the first shaping groove 120 is smaller than the radial width of the first positioning groove 110. The first shaping groove 120 and the first positioning groove 110 are coaxially arranged, and a first step 111 is formed between the first shaping groove 120 and the first positioning groove 110. Similarly, the radial width of the second shaping groove 220 is smaller than the radial width of the second positioning groove 210. The second shaping groove 220 and the second positioning groove 210 are coaxially arranged, and a second step 211 is formed between the second shaping groove 220 and the second positioning groove 210. During assembly, the stator core 400 is clamped and fixed between the first step 111 and the second step 211. The first step 111 is abutted and connected to the inner and outer edges of the non-outgoing end of the stator core 400, and the second step 211 is abutted and connected to the inner and outer edges of the outgoing end of the stator core 400. During glue application, the glue-applying cover plate 100 is positioned above the glue-applying base 200. Glue is poured into the glue-applying hole 130, flowing from the first shaping groove 120 into the toothed grooves of the stator core 400, and then from the toothed grooves into the second shaping groove 220, thereby completing the wrapping and shaping of the coil ends at both axial ends of the stator core 400. For stator cores 400 without a circuit board 410, the winding leads and temperature sensor leads are passed through the outlet holes 230 respectively. Sealant is then injected into the outlet holes 230 using a syringe. The glue application is performed only after the sealant has hardened to prevent glue from flowing out of the outlet holes 230 during the application process.

[0031] In this embodiment, the second shaping groove 220 includes a receiving groove 240, which is disposed on the side of the second shaping groove 220 away from the second positioning groove 210. One side of the receiving groove 240 communicates with the second positioning groove 210, and the other side communicates with the wire outlet hole 230. The receiving groove 240 is used to receive the circuit board 410 on the stator core 400. One side of the circuit board 410 is connected to the coil, and the other side is connected to the lead wire. The receiving groove 240 is used to adapt to the stator core 400 with the circuit board 410 at one end.

[0032] Furthermore, an outer sealing ring 250 and an inner sealing ring 260 are respectively provided on the inner walls on both sides of the bottom of the receiving groove 240. The sealing rings are made of soft material. The diameter of the outer sealing ring 250 is larger than the diameter of the inner sealing ring 260, and the distance between the outer sealing ring 250 and the inner sealing ring 260 is smaller than the radial width of the circuit board 410. During assembly, the circuit board 410 on the stator core 400 simultaneously squeezes the outer sealing ring and the inner sealing ring 260, so that the circuit board 410 is clamped between the outer sealing ring 250 and the inner sealing ring 260. The space between the circuit board 410 and the stator core 400 is sealed by the inner wall of the receiving groove 240, the outer sealing ring 250 and the inner sealing ring 260, and the coil on the stator lead side is potted and shaped, so that the sealant stays between the circuit board 410 and the stator core 400. The circuit board 410 squeezes and seals the sealing ring to prevent the sealant from flowing out from the side of the circuit board 410 during potting.

[0033] Furthermore, an outer mounting groove 241 and an inner mounting groove 242 are respectively provided on the inner walls of both sides of the bottom of the receiving groove 240. The outer sealing ring 250 is disposed in the outer mounting groove 241, and the inner sealing ring 260 is disposed in the inner mounting groove 242. The receiving groove 240 is provided to facilitate the installation and fixing of the outer sealing ring 250 and the inner sealing ring 260.

[0034] Furthermore, there are multiple injection holes 130, which are evenly distributed on the injection cover plate 100. The multiple injection holes 130 also facilitate the venting of air from the injection mold cavity during vacuum curing of the adhesive.

[0035] Furthermore, the glue-filling cover plate 100 is provided with a connecting through hole 140, and the glue-filling base 200 is provided with an internal threaded hole 270. The connecting through hole 140 and the internal threaded hole 270 are coaxially arranged with the glue-filling cover plate 100. The fastening bolt 300 includes a nut portion 310, a connecting portion 320 and a threaded portion 330 connected in sequence. The diameter of the connecting portion 320 is not greater than the diameter of the connecting through hole 140. The threaded portion 330 is adapted to the internal threaded hole 270. The diameter of the nut portion 310 is greater than the diameter of the connecting through hole 140, and the diameter of the connecting portion 320 is not less than the diameter of the threaded portion 330. During assembly, the threaded part 330 passes through the connecting through hole 140 and is fixed by screwing the external thread on the threaded part 330 into the internal thread hole 270. The nut part 310 pushes the glue-filling cover plate 100 to move, so that the glue-filling cover plate 100 and the glue-filling base 200 move in a direction that approaches each other under the action of the fastening bolt 300, so that the stator core 400 can be clamped and fixed by the first positioning groove 110 and the second positioning groove 210.

[0036] Furthermore, the openings of the first positioning groove 110 and the second positioning groove 210 are chamfered to facilitate the stator core 400 being inserted into the first positioning groove 110 and the second positioning groove 210.

[0037] Furthermore, the potting cover plate 100 and / or the potting base 200 are provided with ejector screw holes 150, which penetrate the upper and lower surfaces of the potting cover plate 100 and the potting base 200, and the ejector screw holes 150 of the potting cover plate 100 and the potting base 200 are staggered. After potting, the stator core 400 may be unable to be manually separated from the potting cover plate 100 and the potting base 200. By using a long bolt that matches the thread of the ejector screw hole 150, the potting cover plate 100 and the potting base 200 can be ejected and separated after potting, facilitating demolding.

[0038] This invention mainly uses fastening bolts to secure the glue-filling cover plate and glue-filling base, tightly clamping the stator core between the first and second steps. The stator core is sealed by the inner and outer walls of the first and second steps. The two ends of the coil are respectively housed in the first and second shaping grooves. The shaping glue is poured into the glue-filling hole to glue the stator core. Its simple structure and convenient, quick installation effectively improve assembly and production efficiency. It is particularly suitable for stator cores without slots, eliminating the need for the inner core designed in traditional tooling to prevent glue leakage at the slot, reducing assembly steps, lowering assembly difficulty, and further reducing production costs.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A glue pouring tool for a frameless torque motor slotless stator, characterized in that, The device includes a glue-filling cover plate (100), a glue-filling base (200), and fastening bolts (300). The glue-filling cover plate (100), the glue-filling base (200), and the fastening bolts (300) are coaxially arranged. The glue-filling cover plate (100) has an annular first positioning groove (110), and a first shaping groove (120) is formed at the bottom of the first positioning groove (110). The glue-filling base (200) has an annular second positioning groove (210), and a second shaping groove (220) is formed at the bottom of the second positioning groove (210). The first positioning groove (110) and the second positioning groove (210) are arranged opposite to each other, and the first positioning groove (110) and the second positioning groove (210) are... The radial width of the groove (210) is not less than the radial width of the stator core (400). The glue-filling cover plate (100) is provided with a glue-filling hole (130), which is connected to the first shaping groove (120). The glue-filling base (200) is provided with a wire outlet hole (230), which is connected to the second shaping groove (220). The fastening bolt (300) is used to fix the stator core (400) of the frameless torque motor between the glue-filling cover plate (100) and the glue-filling base (200), and to clamp the edges of the upper and lower ends of the stator core (400) at the bottom of the first positioning groove (110) and the second positioning groove (210).

2. The glue pouring tooling for the slotless stator of the frameless torque motor according to claim 1, characterized in that, The second shaping groove (220) includes a receiving groove (240), which is disposed on the side of the second shaping groove (220) away from the second positioning groove (210). One side of the receiving groove (240) is connected to the second positioning groove (210), and the other side is connected to the wire outlet hole (230).

3. The glue pouring tooling for the slotless stator of the frameless torque motor according to claim 2, characterized in that, An outer sealing ring (250) and an inner sealing ring (260) are respectively provided on the inner walls on both sides of the bottom of the receiving groove (240). The diameter of the outer sealing ring (250) is larger than the diameter of the inner sealing ring (260), and the distance between the outer sealing ring (250) and the inner sealing ring (260) is smaller than the radial width of the circuit board (410).

4. The glue pouring tooling for the slotless stator of the frameless torque motor according to claim 3, characterized in that, The inner walls on both sides of the bottom of the receiving groove (240) are respectively provided with an outer mounting groove (241) and an inner mounting groove (242). The outer sealing ring (250) is disposed in the outer mounting groove (241), and the inner sealing ring (260) is disposed in the inner mounting groove (242).

5. The glue pouring tooling for the slotless stator of the frameless torque motor of claim 1, wherein, There are multiple glue-filling holes (130), and the multiple glue-filling holes (130) are evenly distributed on the glue-filling cover plate (100).

6. The glue pouring tooling for the slotless stator of the frameless torque motor of claim 1, wherein, The glue-filling cover plate (100) is provided with a connecting through hole (140), and the glue-filling base (200) is provided with an internal threaded hole (270). The connecting through hole (140) and the internal threaded hole (270) are coaxially arranged with the glue-filling cover plate (100). The fastening bolt (300) includes a nut part (310), a connecting part (320) and a threaded part (330) connected in sequence. The threaded part (330) is adapted to the internal threaded hole (270), and the diameter of the nut part (310) is larger than the diameter of the connecting through hole (140), and the diameter of the connecting part (320) is not smaller than the diameter of the threaded part (330).

7. The glue-filling tool for the frameless torque motor slotless stator of claim 1, wherein, The openings of the first positioning groove (110) and the second positioning groove (210) are chamfered.

8. The glue pouring tooling for the slotless stator of the frameless torque motor of claim 1, wherein, The glue-filling cover plate (100) and / or the glue-filling base (200) are provided with ejector screw holes (150).

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