A direct drive motor

Abstract

The application relates to the technical field of motors for drum washing machines, in particular to a direct-drive motor which comprises a stator module, a protection mechanism installed outside the stator module, a shaft protection mechanism arranged in the stator module and two groups of exhaust treatment mechanisms installed on the shaft protection mechanism; a shaft hole is formed in the middle of the stator module; the shaft protection mechanism comprises a bearing outer ring and a bearing inner ring arranged in the shaft hole. The structure of the direct-drive motor assembled on the back of the inner drum of the existing washing machine is optimized, and the excellent operation environment of the internal components of the direct-drive motor is obtained; when the main shaft rotates and drives the linkage rod and the impeller to rotate at high speed, the airflow inhaled by the impeller can be directed and output at high flow along the optimized internal flow channel of the direct-drive motor, so that the direct-drive motor can be efficiently cooled, and the efficient operation of the direct-drive motor under the constant temperature state is further improved.

Description

Technical Field

[0001] This invention relates to the field of motor technology for drum washing machines, specifically a direct drive motor. Background Technology

[0002] Direct drive motors are the mainstream high-end drive components for drum washing machines. They eliminate the traditional belt drive structure, with the motor directly connected to the inner drum of the washing machine, achieving precise speed drive. Under high energy conversion efficiency, they can accurately control the transfer and direction of the inner drum.

[0003] Currently, although direct drive motors in drum washing machines have eliminated many transmission structures in practical applications, the rotor rod inside the direct drive motor still needs to be fixed to the inner drum. Therefore, the high-speed rotation of the inner drum under high load will cause increased wear between the rotor and the bearing. In particular, the back cavity of the washing machine is in a semi-sealed state, and the air intake and airflow of the direct drive motor are poor. As a result, the insulation layer, coils and bearings inside the motor will age faster in high temperature and high humidity environments, which will seriously affect the actual service life of the direct drive motor.

[0004] To address these issues, the present invention designs a direct-drive motor. Summary of the Invention

[0005] The present invention aims to solve one of the technical problems existing in the prior art or related technologies.

[0006] Therefore, the technical solution adopted in this invention is as follows: A direct-drive electric motor includes a stator module, a protective mechanism mounted outside the stator module, a shaft protection mechanism disposed within the stator module, and two sets of exhaust treatment mechanisms mounted on the shaft protection mechanism. The stator module has a shaft hole in its center. The shaft protection mechanism includes an outer bearing ring and an inner bearing ring disposed within the shaft hole. A cylindrical insert is inserted into the inner bearing ring, and a rotor rod segment is installed inside the cylindrical insert. Multiple internal ball bearings are disposed within the cavities of the outer and inner bearing rings, and multiple external ball bearings are disposed within the cavities of the outer bearing ring and the shaft hole. A symmetrically distributed front and rear air ducts are disposed at both ends of the shaft hole. A front cover plate is mounted on the outer end of the front air duct, and a rear cover plate is mounted on the outer end of the rear air duct. Two air holes are disposed within the front cover plate. The two sets of exhaust treatment mechanisms are respectively connected to the two air holes.

[0007] In a preferred embodiment, the present invention can be further configured as follows: the front air intake is provided with a plurality of evenly distributed front air intake holes inside the front air intake, the front air intake is provided with a front annular groove on the end face of the front air intake facing the outer ring of the bearing, and the front annular groove is in communication with the plurality of front air intake holes; the outer ring of the front air intake is provided with a plurality of evenly distributed front air vents. The rear air guide shroud has multiple evenly distributed rear exhaust holes. The rear air guide shroud has a rear annular groove on its end face facing the outer ring of the bearing, and the rear annular groove is in communication with the multiple rear exhaust holes. The outer ring of the rear air guide shroud has multiple evenly distributed rear air vents. The front and rear annular grooves are connected to the cavity between the outer ring and the inner ring of the bearing, which facilitates airflow to efficiently dissipate heat from the multiple built-in balls. The front and rear air vents are connected to the cavity between the bearing outer ring and the shaft hole, which facilitates the guidance of airflow to efficiently dissipate heat from multiple external ball bearings.

[0008] In a preferred embodiment, the present invention can be further configured such that: the cylindrical insert has evenly distributed holes inside, and the rear cover has two fan-shaped slots inside, and the fan-shaped slots are connected to multiple front air intakes through the holes inside the cylindrical insert, which facilitates the directional input of airflow.

[0009] In a preferred embodiment, the present invention can be further configured such that: the inner walls of the front and rear air deflectors are each fixedly equipped with a plurality of pads, and the front and rear cover plates are respectively fixedly installed on the plurality of pads inside the front and rear air deflectors by a plurality of reinforcing bolts.

[0010] In a preferred embodiment, the present invention can be further configured as follows: the exhaust treatment mechanism includes an exhaust pipe installed on an air hole inside the front cover plate, a cylindrical shell is fixedly installed at the outer end of the exhaust pipe, a plug is installed at the port of the cylindrical shell, and a filter element is inserted into the inside of the cylindrical shell; The exhaust pipe is externally clamped with an auxiliary clamping plate and a secondary clamping plate, and four combination bolts are installed between the auxiliary clamping plate and the secondary clamping plate after closure.

[0011] In a preferred embodiment, the present invention can be further configured as follows: the protective mechanism includes a reinforced outer shell inserted into the outside of the stator module, a plurality of evenly distributed magnets are installed inside the reinforced outer shell, and a pressure-bearing ring is fixedly installed inside the reinforced outer shell. A plurality of studs are provided on the pressure-bearing ring, and a limiting ring is movably installed on the outside of the plurality of studs. A secondary filter membrane is sandwiched between the pressure-bearing ring and the limiting ring. A T-shaped rod sleeve is provided in the middle of the secondary filter membrane.

[0012] In a preferred embodiment, the present invention can be further configured as follows: a cover is fixedly installed on the outer end of the reinforced shell, a plurality of air holes are opened in the cover, and a primary filter screen is fixedly installed in the air holes; a stabilizing bearing is installed in the hole in the middle of the cover, and a horizontal linkage rod is installed inside the stabilizing bearing. The inner end of the linkage rod has a cross-shaped structure, and the output end of the rotor rod segment has a cross-shaped insertion hole.

[0013] In a preferred embodiment, the present invention can be further configured as follows: an impeller and a sliding roller are fixedly installed on the outside of the linkage rod; a sleeve is movably installed on the outside of the sliding roller; a slider is movably installed in the groove on the outer wall of the sliding roller; and a sliding rod is movably installed in the slider. A horizontally positioned positioning plate is fixedly installed on the inner wall of the reinforced outer shell, and the pipe section outside the sleeve is adapted to pass through the slide inside the positioning plate.

[0014] In a preferred embodiment, the present invention can be further configured such that: a force arm is provided at the outer end of the slide rod, and two studs are provided at the bottom end of the force arm, and clamps are inserted into the outside of the two studs and fixed by two nuts. After closing, the force arm and clamps are used to adapt and clamp the T-shaped rod sleeve inside the secondary filter membrane.

[0015] In a preferred embodiment, the present invention can be further configured such that: a rectangular plate segment is provided on the back of the auxiliary clamping plate, and the rectangular plate segment is welded to the port of the reinforced outer shell facing the inner cylinder; the two sets of auxiliary clamping plates and the auxiliary clamping plate can enhance the stability of the two sets of exhaust pipes and the cylinder shell during exhaust.

[0016] By adopting the above technical solution, the beneficial effects achieved by the present invention are as follows: 1. This invention optimizes the structure of the direct drive motor mounted on the back of the inner drum of the existing washing machine and provides an excellent operating environment for the internal components of the direct drive motor. When the main shaft rotates and drives the linkage rod and impeller to rotate at high speed, the airflow drawn in by the impeller will be directional and output in a high-speed manner along the internal flow channel of the optimized direct drive motor, thereby providing efficient heat dissipation for the direct drive motor and further improving the efficient operation of the direct drive motor under constant temperature conditions.

[0017] 2. This invention assembles a stacked bearing inner ring and bearing outer ring in the shaft hole inside the existing stator module, and sets multiple evenly distributed balls in the gap between the bearing inner ring, bearing outer ring and the customized module. It also uses two sets of guide shrouds and cover plates to seal both ends of the shaft hole. Finally, the high-velocity airflow that is continuously drawn in can continuously and efficiently dissipate heat along the flow channel of the shaft hole inside the stator module. This improves the actual compressive strength between the rotor and the bearing, and also achieves high cooling efficiency between the shaft and the bearing at high speed.

[0018] 3. This invention installs a linkage rod in the insertion hole at the rotor input end. As the linkage rod drives the impeller and the sliding roller to rotate at high speed, the outside air is actively and at constant pressure drawn in. The slider and sliding rod, which are assisted by the high frequency of the sliding roller, drive the power arm, clamp and secondary filter membrane to vibrate at high frequency. This can dynamically filter and purify the continuously drawn-in airflow, thereby preventing dirt in the airflow from adhering to or corroding the internal environment or components of the direct drive motor. Attached Figure Description

[0019] Figure 1 This is a schematic diagram illustrating the use of the present invention; Figure 2 This is a bottom view diagram of the present invention; Figure 3 For the present invention Figure 2 An explosion diagram; Figure 4 This is a schematic diagram of the protective mechanism of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle; Figure 6 For the present invention Figure 4 Enlarged view of point B in the middle; Figure 7 For the present invention Figure 3 Internal diagram; Figure 8 This is a schematic diagram of the exhaust treatment mechanism of the present invention; Figure 9 For the present invention Figure 8 Enlarged view of point C in the middle; Figure 10 This is an exploded view of the shaft protection mechanism of the present invention; Figure 11 This is a cross-sectional schematic diagram of the front and rear air deflectors of the present invention.

[0020] Figure label: 100. Protective mechanism; 110. Reinforced outer shell; 1101. Pressure bearing ring; 1102. Stud; 1103. Limiting ring; 120. Magnet; 130. Cover; 1301. Air vent; 1302. Primary filter screen; 1303. Stabilizing bearing; 140. Linkage rod; 1401. Sliding roller; 1402. Sleeve; 1403. Sliding block; 1404. Sliding rod; 150. Positioning plate; 160. Lever arm; 1601. Clamp; 170. Secondary filter membrane; 180. Impeller; 200. Stator module; 300. Shaft protection mechanism; 310. Bearing outer ring; 3101. Internal ball bearing; 3102. Bearing inner ring; 3103. External ball bearing; 320. Columnar insert; 330. Rotor rod segment; 340. Front air guide; 3401. Front air vent; 3402. Front air inlet; 3403. Front annular groove; 350. Front cover plate; 360. Rear air guide; 3601. Rear air vent; 3602. Rear exhaust port; 3603. Rear annular groove; 370. Rear cover plate; 380. Reinforcing bolt; 400. Exhaust treatment mechanism; 410. Exhaust pipe; 420. Shell; 4201. Plug; 430. Filter element; 440. Auxiliary clamping plate; 4401. Secondary clamping plate; 4402. Combination bolt. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0022] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the invention.

[0023] The following describes, with reference to the accompanying drawings, some embodiments of a direct-drive electric motor provided by the present invention.

[0024] Example 1: Combination Figures 1 to 11 As shown, the present invention provides a direct-drive motor, including a stator module 200, a protective mechanism 100 installed outside the stator module 200, a shaft protection mechanism 300 disposed inside the stator module 200, and two sets of exhaust treatment mechanisms 400 installed on the shaft protection mechanism 300. The stator module 200 is fixed to the inner cylinder by four bolts, while the protective mechanism 100 is press-fitted to the outside of the stator module 200 and fixed to the inner cylinder, which is used to provide effective protection for the stator module 200 and the shaft protection mechanism 300, so as to improve the internal environment of the motor and maintain a constant temperature. In a constant temperature environment, the shaft protection mechanism 300 can further improve the pressure load and service life between the shaft and the bearing.

[0025] The protective mechanism 100 includes a reinforced housing 110 inserted into the outside of the stator module 200. Multiple magnets 120 are evenly distributed inside the reinforced housing 110, and a pressure ring 1101 is fixedly installed inside the reinforced housing 110. Multiple studs 1102 are provided on the pressure ring 1101, and a limiting ring 1103 is movably installed outside the multiple studs 1102. A secondary filter membrane 170 is sandwiched between the pressure ring 1101 and the limiting ring 1103. A T-shaped rod sleeve is provided in the middle of the secondary filter membrane 170; A cover 130 is fixedly installed on the outer end of the reinforced outer shell 110. Multiple air holes 1301 are opened inside the cover 130, and a primary filter screen 1302 is fixedly installed inside the air holes 1301. A stabilizing bearing 1303 is installed in the hole in the middle of the cover 130, and a horizontal linkage rod 140 is installed inside the stabilizing bearing 1303. An impeller 180 and a sliding roller 1401 are externally fixedly mounted on the linkage rod 140.

[0026] Preferably, the multiple magnets 120 that are evenly distributed are located on the outside of the stator module 200, and a certain gap is reserved between the multiple magnets 120 and the stator module 200. The primary filter 1302 has a double-layer filter on its surface, which facilitates the initial filtration of the air entering the reinforced housing 110 and the inner cavity of the cover 130. When the linkage rod 140 is assisted to rotate and drive the impeller 180 to rotate at high speed, the outside air will pass through the multiple primary filters 1302, and the air will be initially purified and filtered. The vibration microwave generated by the synchronously vibrating secondary filter membrane 170 can act on the reinforced housing 110 and the cover 130, thereby removing the dirt remaining on the outer surface of the multiple primary filters 1302.

[0027] A shaft hole is provided in the middle of the stator module 200; The shaft protection mechanism 300 includes an outer bearing ring 310 and an inner bearing ring 3102 disposed in the shaft hole. A cylindrical insert 320 is inserted into the inner bearing ring 3102. A rotor rod segment 330 is installed inside the cylindrical insert 320. Multiple internal balls 3101 are disposed in the cavities of the outer bearing ring 310 and the inner bearing ring 3102. Multiple external balls 3103 are disposed in the outer bearing ring 310 and the shaft hole cavity. A symmetrically distributed front guide shroud 340 and a rear guide shroud 360 are disposed at both ends of the shaft hole. A front cover plate 350 is installed at the outer end of the front guide shroud 340. A rear cover plate 370 is installed at the outer end of the rear guide shroud 360. Two air holes are opened in the front cover plate 350. The inner end of the linkage rod 140 has a cross-shaped structure, and the output end of the rotor rod segment 330 is provided with a cross-shaped insertion hole; The front air intake shroud 340 has multiple evenly distributed front air intake holes 3402 inside. The front air intake shroud 340 has a front annular groove 3403 on the end face facing the outer ring 310 of the bearing, and the front annular groove 3403 is in communication with the multiple front air intake holes 3402. The outer ring of the front air intake shroud 340 has multiple evenly distributed front air vents 3401. The rear air guide shroud 360 has multiple evenly distributed rear exhaust holes 3602 inside, and the rear air guide shroud 360 has a rear annular groove 3603 on the end face facing the outer ring 310 of the bearing. The rear annular groove 3603 is in communication with the multiple rear exhaust holes 3602. The outer ring of the rear air guide shroud 360 has multiple evenly distributed rear air vents 3601. The front annular groove 3403 and the rear annular groove 3603 are connected to the cavity between the outer ring 310 and the inner ring 3102 of the bearing, which facilitates the airflow to efficiently dissipate heat from the multiple built-in balls 3101. The front air vent 3401 and the rear air vent 3601 are connected to the cavity between the bearing outer ring 310 and the shaft hole, which facilitates the airflow to efficiently dissipate heat from the multiple external balls 3103. The cylindrical insert 320 has evenly distributed holes inside, and the rear cover plate 370 has two fan-shaped slots inside. The fan-shaped slots are connected to multiple front air intakes 3402 through the holes inside the cylindrical insert 320, which facilitates the directional input of airflow. Multiple feet are fixedly installed on the inner walls of the front fairing 340 and the rear fairing 360, and the front cover plate 350 and the rear cover plate 370 are respectively fixedly installed on the multiple feet inside the front fairing 340 and the rear fairing 360 by multiple reinforcing bolts 380.

[0028] Preferably, the front guide shroud 340, front cover 350, rear guide shroud 360 and rear cover 370 stacked by multiple rear cover plates 370 are used to provide double-end stabilization protection for the bearing outer ring 310, bearing inner ring 3102 and multiple built-in balls 3101 and multiple external balls 3103 installed in the shaft hole, and the protruding rod sections at both ends of the built-in balls 3101 are respectively inserted into the front annular groove 3403 and the rear annular groove 3603; When the rotor segment 330 and the cylindrical insert 320 rotate and drive the linkage rod 140 to rotate, the high-speed rotating impeller 180 draws in air, which is then purified by the secondary filter membrane 170. The airflow then enters the internal holes of the cylindrical insert 320 through two fan-shaped slots in the middle of the rear cover plate 370. Meanwhile, the directly supplied airflow enters the cavity between the outer ring 310 and the inner ring 3102 of the bearing from the multiple front air inlets 3402, facilitating efficient and effective cleaning of the evenly distributed internal balls 3101. Comprehensive heat dissipation treatment, and the airflow after heat dissipation will enter the outer cavity formed by the rear air guide shroud 360 and the rear cover plate 370 through the rear annular groove 3603 and multiple rear exhaust holes 3602. Finally, the airflow will enter the cavity between the bearing outer ring 310 and the shaft hole from multiple rear air vents 3601. At this time, the multiple evenly distributed external balls 3103 can achieve comprehensive and efficient heat dissipation. Finally, the hot airflow will converge in the outer cavity formed by the front air guide shroud 340 and the front cover plate 350. By directing and maintaining constant pressure in the airflow, shafts and bearings under high loads can be effectively protected, thus extending their service life.

[0029] Example 2: Combination Figures 5 to 11 As shown, based on Embodiment 1, a sleeve 1402 is movably installed on the outside of the slide roller 1401, a slider 1403 is movably installed in the groove on the outer wall of the slide roller 1401, and a slide rod 1404 is movably installed in the slider 1403. A horizontally positioned positioning plate 150 is fixedly installed on the inner wall of the reinforced outer shell 110, and the pipe section outside the sleeve 1402 is adapted to pass through the slide inside the positioning plate 150. The outer end of the slide bar 1404 is provided with a lever arm 160. The bottom end of the lever arm 160 is provided with two studs, and the two studs are inserted into the outside of the clamps 1601 and fixed by two nuts. After closing, the lever arm 160 and the clamp 1601 are used to fit and clamp the T-shaped rod sleeve in the secondary filter membrane 170.

[0030] Preferably, in order to improve the smoothness of the high-frequency movement of the sliding roller 1401, the slider 1403 and the sliding rod 1404, the gap between the sleeve 1402 and the sliding roller 1401 needs to be filled with lubricating oil, and the positioning plate 150 is in an L-shaped structure, and the end of the positioning plate 150 facing the sliding rod 1404 is provided with an elliptical slide rail, while the lever arm 160 is located outside the slide rail; When the linkage rod 140 drives the sliding roller 1401 to rotate, the slider 1403 and the sliding rod 1404, which are constrained by the positioning plate 150 and the sleeve 1402, will drive the power arm 160 and the clamp 1601 to extend at high frequency. The secondary filter membrane 170, which is clamped by the power arm 160 and the clamp 1601, will vibrate at high frequency, which facilitates dynamic filtration of the airflow between the input reinforced housing 110, the cover 130 and the secondary filter membrane 170. After the clean airflow enters the area where the stator module 200 and the shaft protection mechanism 300 are located, it can avoid the disadvantages of dirt causing pollution or corrosion to the stator module 200 and its internal shaft protection mechanism 300.

[0031] Example 3: Combination Figure 8 and Figure 9 As shown, in the above embodiment, the two sets of exhaust treatment mechanisms 400 are respectively connected to two air holes; The exhaust treatment mechanism 400 includes an exhaust pipe 410 installed on the air hole inside the front cover plate 350, a cylindrical shell 420 fixedly installed on the outer end of the exhaust pipe 410, a plug 4201 installed on the port of the cylindrical shell 420, and a filter element 430 inserted into the inside of the cylindrical shell 420. The exhaust pipe 410 is externally clamped with an auxiliary clamping plate 440 and a secondary clamping plate 4401, and after closing, four combination bolts 4402 are installed between the auxiliary clamping plate 440 and the secondary clamping plate 4401. The back of the auxiliary clamping plate 440 is provided with a rectangular plate segment, which is welded to the port of the reinforced outer shell 110 facing the inner cylinder. The two sets of auxiliary clamping plates 440 and auxiliary clamping plates 4401 can enhance the stability of the two sets of exhaust pipes 410 and the cylinder shell 420 during exhaust.

[0032] The preferred exhaust pipe 410 has a U-shaped structure, and the plug 4201 is composed of a circular cover plate and an L-shaped exhaust pipe; The filter element 430 has the same diameter as the inner hole of the drum shell 420, which facilitates dehumidification and dirt adsorption of the output airflow. The two external exhaust treatment mechanisms 400 can protect against insects when the washing machine is not in use, and at the same time ensure the cleanliness and dryness of the internal environment of the direct drive motor when it is not in use. In addition, the inner wall of the cylindrical shell 420 is provided with two protruding plate segments, which are fixedly installed on the outer wall of the reinforced outer shell 110 by welding, so as to enhance the stability of the two cylindrical shells 420 when they are placed horizontally and suspended.

[0033] The working principle and usage process of the present invention: The output end of the rotor rod segment 330 is pre-assembled with the shaft hole on the back of the washing machine inner drum, and the cylindrical plug 320 pre-installed on the outside of the rotor rod segment 330 provides an effective support carrier for the bearing inner ring 3102, the built-in ball 3101 and the bearing outer ring 310 of the set structure, and the cylindrical plug 320 is matched and engaged with the toothed groove on the inner wall of the bearing inner ring 3102. Next, the stator module 200 is pre-assembled along the outside of the bearing outer ring 310 until the end faces of both ends of the bearing outer ring 310 are aligned with the two side ports of the stator module 200. To enhance the stability of the stator module 200 outside the bearing outer ring 310, multiple evenly distributed external balls 3103 are inserted into the gap between the stator module 200 and the bearing outer ring 310. Finally, the rear cover plate 370 and the rear guide shroud 360 are stacked and fixed using multiple reinforcing bolts 380, and the stacked rear guide shroud 360 is pressed onto the stator module 200. The gap at the outer port of the submodule 200 facilitates the limiting and bearing of multiple evenly distributed external balls 3103. Correspondingly, the front cover 350 and the front guide shroud 340, which are stacked by multiple rear cover plates 370, are located in the gap at the inner port of the stator module 200. The assembled stator module 200 is fixed to the wheel of the washing machine inner drum using four bolts. Finally, the protective mechanism 100 is press-fitted onto the outside of the fixed stator module 200. The two evenly distributed exhaust treatment mechanisms 400 are adapted and connected to the two air holes on the outside of the front cover plate 350. In use, when the rotor segment 330 and the cylindrical insert 320 rotate, the inner cylinder installed on the output end of the rotor segment 330 is assisted. Correspondingly, the linkage rod 140 is inserted into the input end socket of the rotor segment 330. Under the positioning constraints of the sleeve 1402 and the positioning plate 150, the rotating linkage rod 140 and the sliding roller 1401 will assist the slider 1403 and the sliding rod 1404 to vibrate at high frequency. The impeller 180 fixed at the end of the linkage rod 140 will actively draw in outside air to reinforce the outer shell 1 under the action of high-speed rotation. 10. In the cavity formed by the cover 130, the high-frequency vibrating slide bar 1404 will drive the power arm 160, clamp 1601 and secondary filter membrane 170 to vibrate. Since the side of the secondary filter membrane 170 is fixed by the pressure ring 1101, the limiting ring 1103 and multiple studs 1102, the vibration amplitude of the secondary filter membrane 170 from the middle to the side will gradually decrease. Therefore, it can actively intercept the dirt in the input airflow and transfer it to the side, further improving the output efficiency of the airflow through the middle of the secondary filter membrane 170. Meanwhile, after the airflow is actively purified, the filtered airflow, constrained by the inner cavity of the reinforced outer shell 110 and the cover 130, will enter through two fan-shaped slots in the middle of the rear cover plate 370. Then, the airflow will be directly transported along the holes inside the cylindrical insert 320 and enter the cavity of the inner ring of the front cover plate 350 and the front air guide shroud 340. As the airflow enters the inner side of the front annular groove 3403 through multiple evenly distributed front air intake holes 3402, the airflow will move from the front annular groove 3403 towards the shaft. The airflow is released from the cavity between the outer ring 310 and the inner ring 3102 of the bearing. At this time, the airflow will efficiently cool the evenly distributed internal balls 3101. As the airflow is further transferred, it enters the inner side of the rear annular groove 3603 from the cavity between the outer ring 310 and the inner ring 3102 of the bearing. The airflow will then enter the outer cavity formed by the rear guide shroud 360 and the rear cover plate 370 along multiple rear exhaust holes 3602. Finally, the airflow will be transferred to the bearing from multiple rear air vents 3601. Within the annular gap formed by the outer ring 310 and the stator module 200, the continuously output airflow can efficiently dissipate heat from the evenly distributed external ball bearings 3103. As the hot airflow is transferred from the annular cavity between the bearing outer ring 310 and the stator module 200 along multiple front air vents 3401 to the outer cavity formed by the front guide shroud 340 and the front cover plate 350, the hot airflow will be transferred to the two sets of exhaust treatment mechanisms 400. Finally, the moisture and dirt in the hot airflow will be adsorbed by the two filter elements 430 filled inside the two sets of drum shells 420 and plugs 4201. At the same time, the two external filter elements 430 can prevent external moisture, dirt or insects from entering when the washing machine is not in operation, further ensuring the cleanliness and safety of the environment where the protection mechanism 100 and the stator module 200 are located, further improving the service life of the direct drive motor under high load conditions, and avoiding the disadvantage of damage to the direct drive motor due to excessive load in high temperature and high humidity environments.

[0034] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A direct-drive electric motor, comprising a stator module (200), characterized in that, It also includes a protective mechanism (100) installed outside the stator module (200), a shaft protection mechanism (300) installed inside the stator module (200), and two sets of exhaust treatment mechanisms (400) installed on the shaft protection mechanism (300). The stator module (200) has a shaft hole in the middle; The shaft protection mechanism (300) includes an outer bearing ring (310) and an inner bearing ring (3102) disposed in the shaft hole. A cylindrical insert (320) is inserted inside the inner bearing ring (3102). A rotor rod segment (330) is installed inside the cylindrical insert (320). Multiple internal balls (3101) are disposed in the cavities of the outer bearing ring (310) and the inner bearing ring (3102). Multiple external balls (3103) are disposed in the outer bearing ring (310) and the shaft hole cavity. A symmetrically distributed front guide shroud (340) and a rear guide shroud (360) are disposed at both ends of the shaft hole. A front cover plate (350) is installed at the outer end of the front guide shroud (340). A rear cover plate (370) is installed at the outer end of the rear guide shroud (360). Two air holes are opened in the front cover plate (350). The two sets of exhaust treatment mechanisms (400) are respectively connected to two air vents.

2. The direct-drive electric motor according to claim 1, characterized in that, The front air intake (340) has multiple evenly distributed front air inlets (3402) inside. The front air intake (340) has a front annular groove (3403) on the end face facing the outer ring (310) of the bearing, and the front annular groove (3403) is in communication with the multiple front air inlets (3402). The outer ring of the front air intake (340) has multiple evenly distributed front air vents (3401). The rear air guide (360) has a plurality of evenly distributed rear exhaust holes (3602) inside. The rear air guide (360) has a rear annular groove (3603) on the end face facing the outer ring (310) of the bearing, and the rear annular groove (3603) is in communication with the plurality of rear exhaust holes (3602). The outer ring of the rear air guide (360) has a plurality of evenly distributed rear air vents (3601). The front annular groove (3403) and the rear annular groove (3603) are connected to the cavity between the outer ring (310) and the inner ring (3102) of the bearing, which facilitates the airflow to efficiently dissipate heat from the multiple built-in balls (3101); The front air vent (3401) and the rear air vent (3601) are connected to the cavity between the bearing outer ring (310) and the shaft hole, which facilitates the airflow to efficiently dissipate heat from the multiple external balls (3103).

3. A direct-drive electric motor according to claim 1, characterized in that, The cylindrical insert (320) has evenly distributed holes inside, and the rear cover plate (370) has two fan-shaped slots inside. The fan-shaped slots are connected to multiple front air inlets (3402) through the holes inside the cylindrical insert (320), which facilitates the directional input of airflow.

4. A direct-drive electric motor according to claim 1, characterized in that, The inner walls of the front fairing (340) and the rear fairing (360) are each fixedly equipped with multiple pads, and the front cover plate (350) and the rear cover plate (370) are respectively fixedly installed on the multiple pads inside the front fairing (340) and the rear fairing (360) by multiple reinforcing bolts (380).

5. A direct-drive electric motor according to claim 1, characterized in that, The exhaust treatment mechanism (400) includes an exhaust pipe (410) installed on the air hole inside the front cover plate (350), a cylindrical shell (420) is fixedly installed at the outer end of the exhaust pipe (410), a plug (4201) is installed on the port of the cylindrical shell (420), and a filter element (430) is inserted into the inside of the cylindrical shell (420). The exhaust pipe (410) is externally clamped with an auxiliary clamping plate (440) and a secondary clamping plate (4401), and after closing, four combination bolts (4402) are installed between the auxiliary clamping plate (440) and the secondary clamping plate (4401).

6. A direct-drive electric motor according to claim 1, characterized in that, The protective mechanism (100) includes a reinforced outer shell (110) inserted into the outside of the stator module (200). Multiple magnets (120) are evenly distributed inside the reinforced outer shell (110), and a pressure ring (1101) is fixedly installed inside the reinforced outer shell (110). Multiple studs (1102) are provided on the pressure ring (1101), and a limiting ring (1103) is movably installed outside the multiple studs (1102). A secondary filter membrane (170) is sandwiched between the pressure ring (1101) and the limiting ring (1103). A T-shaped rod sleeve is provided in the middle of the secondary filter membrane (170).

7. A direct-drive electric motor according to claim 6, characterized in that, A cover (130) is fixedly installed on the outer end of the reinforced outer shell (110). A number of air holes (1301) are opened in the cover (130), and a primary filter screen (1302) is fixedly installed in the air hole (1301). A stabilizing bearing (1303) is installed in the hole in the middle of the cover (130), and a horizontal linkage rod (140) is installed inside the stabilizing bearing (1303). The inner end of the linkage rod (140) has a cross-shaped structure, and the output end of the rotor rod segment (330) is provided with a cross-shaped insertion hole.

8. A direct-drive electric motor according to claim 7, characterized in that, An impeller (180) and a slide roller (1401) are fixedly installed on the outside of the linkage rod (140). A sleeve (1402) is movably installed on the outside of the slide roller (1401). A slider (1403) is movably installed in the groove on the outer wall of the slide roller (1401). A slide rod (1404) is movably installed in the slider (1403). The inner wall of the reinforced outer shell (110) is fixedly installed with a horizontally placed positioning plate (150), and the pipe section outside the sleeve (1402) is adapted to pass through the slide inside the positioning plate (150).

9. A direct-drive electric motor according to claim 8, characterized in that, The outer end of the slide bar (1404) is provided with a lever arm (160), and the bottom end of the lever arm (160) is provided with two studs. The two studs are inserted into the outside of the two studs and fixed by two nuts. After closing, the lever arm (160) and the clamp (1601) are used to fit and clamp the T-shaped rod sleeve in the secondary filter membrane (170).

10. A direct-drive electric motor according to claim 5, characterized in that, The back of the auxiliary clamping plate (440) is provided with a rectangular plate segment, and the rectangular plate segment is welded to the port of the reinforced outer shell (110) facing the inner cylinder. The two sets of auxiliary clamping plates (440) and auxiliary clamping plates (4401) can enhance the stability of the two sets of exhaust pipes (410) and the cylinder shell (420) during exhaust.

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