Fan impeller assembly for washing machine motor and washing machine

Abstract

The invention discloses a fan impeller assembly for a washing machine motor and a washing machine, and relates to the technical field of washing machines, the fan impeller assembly comprises a driving disc, and further comprises a driven disc, the driven disc and the driving disc are coaxially arranged, the driven disc is provided with a wheel groove used for installing a transmission belt, and the bottom of the driven disc is fixedly connected with an impeller and an overload protection mechanism. The driven disc is elastically inserted into the periphery of the driving disc, a groove allowing an overload protection mechanism to be inserted is formed in the inner wall of the driven disc, the offset detection assembly is elastically installed on the bottom face of the impeller in a sliding mode, and a positioning groove matched with one end of the offset detection assembly is formed in the driven disc. When serious overload occurs and the driving disc enters an idling state, the air blowing assembly on the deviation detection assembly resets and is in transmission connection with the idling driving disc, air is forcibly supplied through the air blowing assembly in the idling stage, local overheating of a motor is avoided, the service life is prolonged, the protection, detection and heat dissipation functions are integrated in the impeller assembly, and the service life of the motor is prolonged. Extra parts are reduced, and cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of washing machine technology, specifically to a fan impeller assembly for a washing machine motor and a washing machine. Background Technology

[0002] Washing machine motors are under heavy loads during washing and spin-drying, generating a lot of heat. They need to drive the fan impeller to rotate at high speed via the pulley on the motor shaft. Without this cooling fan for forced heat dissipation, relying solely on natural air convection for heat dissipation is too inefficient, and the motor is prone to overheating. This can lead to insulation aging, reduced efficiency, or even burnout of the coil, causing serious malfunctions.

[0003] The existing patent application, with publication number CN105937118B and publication date of July 31, 2018, is entitled "Impeller for Washing Machine Motor and Pulsator Washing Machine Having the Same." This patent includes a disc with a shaft hole for mounting a motor shaft, a belt axle for mounting a belt, and multiple first and second notches. The area of ​​the first notch is smaller than the area of ​​the second notch. The edge of the first notch is formed as an arc protruding towards the center of the disc, and the edge of the second notch is formed as a U-shape with its opening facing away from the center of the disc, and the bottom edge of the U-shape extends circumferentially along the disc. Multiple blades are spaced circumferentially on the upper surface of the disc. The multiple first and second notches are alternately distributed circumferentially along the disc, with a blade positioned between adjacent first and second notches. The impeller according to this invention can increase the airflow to the motor surface, improving heat dissipation for the washing machine motor, without increasing the number of blades, resulting in less material usage and lower cost.

[0004] The above-mentioned application has shortcomings. Washing machine motors often experience stalling or overload due to sudden load changes during operation. If protective measures are not taken in time, the motor may overheat and be damaged, or even cause safety accidents. Traditional overload protection mechanisms can only achieve power separation, but cannot effectively dissipate heat from the drive disc in the idling state. Continuous idling may cause the motor to overheat, affecting its lifespan or even causing failure. The protection mechanism only focuses on power separation and lacks the function of detecting and compensating for the dynamic offset of the impeller. When operating at high speed or under sudden load changes, the transmission stability is easily reduced due to vibration, which poses a safety hazard. Summary of the Invention

[0005] The purpose of this invention is to provide a fan impeller assembly for a washing machine motor and a washing machine, so as to overcome the shortcomings of the prior art.

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

[0007] An impeller assembly for a washing machine motor includes a drive disc and a driven disc coaxially arranged with the drive disc and having a groove for mounting a transmission belt. An impeller is fixedly connected to the bottom of the driven disc. An overload protection mechanism is elastically inserted into the outer periphery of the drive disc. A groove for the overload protection mechanism to be inserted is formed in the inner wall of the driven disc. An offset detection component is elastically slidably mounted on the bottom surface of the impeller. A positioning groove matching one end of the offset detection component is formed in the driven disc. A blower component is rotatably mounted on the offset detection component and is connected to the drive disc during overload idling. When the drive disc reaches a set speed, it centrifugally drives the offset detection component to radially insert into the positioning groove. When the drive disc is overloaded and idling, it drives the blower component to generate a cooling airflow.

[0008] Preferably, a limiting ring is fixedly connected to the bottom of the inner wall of the driven disk. One side of the limiting ring is in contact with the drive disk, and the other side is in contact with the impeller. The positioning groove is formed on the inner side of the limiting ring.

[0009] Preferably, the overload protection mechanism includes a number of plug-in pins arranged in a ring and inserted into the drive disk. One end of each plug-in pin is fixedly connected to the drive disk with a top spring, and the other end is symmetrically provided with abutment grooves.

[0010] Preferably, the offset detection component includes several connecting frames distributed in a ring on the bottom surface of the impeller. A positioning plug block is fixedly connected to one end of the connecting frame near the center of the drive disk. A reinforcing ring is fixedly connected to the bottom surface of the impeller. A slot for the connecting rod to pass through is opened on the top of the reinforcing ring. A return spring is installed in the slot. A plug piece is fixedly connected to one end of the return spring. The top of the plug piece is inserted into the connecting rod.

[0011] Preferably, a counterweight rod is slidably mounted on the outer side of the impeller, and extended blades are mounted on both ends of the counterweight rod. The end of the connecting frame near the extended blades is connected to the counterweight rod.

[0012] Preferably, the blower assembly includes a shaft that passes through the connecting frame, a friction drive wheel is fixedly connected to the top of the shaft, a heat dissipation fan is fixedly connected to the bottom of the shaft, and a drive ring that contacts the outer circumferential surface of the friction drive wheel is fixedly connected to the bottom of the drive disc.

[0013] Preferably, an annular anti-detachment cover is installed on the top of the driven disk, the bottom of the annular anti-detachment cover is in contact with the top surface of the drive disk, and a bushing is fixedly connected to the center of the drive disk, with the top of the bushing penetrating the annular anti-detachment cover.

[0014] Preferably, a compression spring is installed at the bottom of the annular anti-detachment cover, a brake buffer ring is fixedly connected to the bottom of the compression spring, and a washer ring that contacts the brake buffer ring is embedded at the top of the drive disc.

[0015] Preferably, the impeller has multiple sets of reinforcing ribs distributed in a ring on its outer side, each set of reinforcing ribs is arranged radially, and the top of the reinforcing ribs has an insertion hole for the connecting bracket to pass through.

[0016] A washing machine includes the aforementioned impeller assembly for a washing machine motor.

[0017] In the above technical solution, anti-deviation detection is performed by an offset detection component set on the impeller. During normal washing or spin-drying of the washing machine, the drive disc drives the driven disc to rotate at high speed. The offset detection component will extend radially under the action of centrifugal force. If the impeller and the driven disc are firmly connected, one end of the component will accurately insert into the preset positioning groove in the driven disc, indicating that the system is operating normally. If deviation or loosening occurs, it will not be able to be inserted in the center, thus providing a real-time mechanical connection status monitoring signal for the system. When a severe overload occurs, the overload protection mechanism will act to disengage the drive disc from the driven disc, and the drive disc will enter an idling state. At this time, the blowing component on the offset detection component will reset and form a transmission connection with the idling drive disc. The blowing component will force airflow during the idling stage to avoid local overheating of the motor and extend its service life. The protection, detection and heat dissipation functions are integrated into the impeller assembly, reducing additional parts and lowering costs.

[0018] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0019] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure of a fan impeller assembly for a washing machine motor according to the present invention;

[0022] Figure 2 This is an overall cross-sectional view of a fan impeller assembly for a washing machine motor according to the present invention.

[0023] Figure 3 This is a schematic diagram of the impeller and offset detection component in a fan impeller assembly for a washing machine motor according to the present invention;

[0024] Figure 4 This is a bottom view of an impeller in a fan impeller assembly for a washing machine motor according to the present invention.

[0025] Figure 5 This is a schematic diagram of the offset detection component and the limiting ring in the impeller assembly of a washing machine motor according to the present invention;

[0026] Figure 6 This is a schematic diagram of the drive disc and overload protection mechanism in the impeller assembly of a washing machine motor according to the present invention.

[0027] Figure 7 This is a schematic diagram of the blowing component in the impeller assembly of a washing machine motor according to the present invention;

[0028] Figure 8 This is a schematic diagram of the reinforcing ring in the impeller assembly of a washing machine motor according to the present invention;

[0029] Figure 9 This is a schematic diagram of the structure of an annular anti-detachment cover in the impeller assembly of a washing machine motor according to the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Drive disc; 11. Transmission ring; 12. Bushing; 13. Washer ring; 14. Guide hole; 2. Driven disc; 21. Wheel groove; 22. Groove; 23. Positioning groove; 24. Limiting ring; 25. Annular anti-detachment cover; 26. Compression spring; 27. Brake buffer ring; 3. Impeller; 31. Reinforcing ring; 32. Slot; 33. Return spring; 34. Insertion piece; 35. Counterweight rod; 36. Extension blade; 37. Reinforcing rib; 38. Insertion hole; 39. Receiving ring; 4. Overload protection mechanism; 41. Insertion post; 42. Top spring; 43. Abutment groove; 5. Offset detection assembly; 51. Connecting frame; 52. Positioning insertion block; 6. Blowing assembly; 61. Shaft; 62. Friction transmission wheel; 63. Cooling fan blade. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0033] Please see Figure 1-9This invention provides an impeller 3 assembly for a washing machine motor, comprising a drive disc 1 and a driven disc 2, which is coaxially arranged with the drive disc 1 and has a wheel groove 21 for mounting a transmission belt. An impeller 3 is fixedly connected to the bottom of the driven disc 2. An overload protection mechanism 4 is elastically inserted into the outer periphery of the drive disc 1. A groove 22 for the overload protection mechanism 4 to be inserted is provided on the inner wall of the driven disc 2. An offset detection component 5 is elastically slidably mounted on the bottom surface of the impeller 3. A positioning groove 23 matching one end of the offset detection component 5 is provided in the driven disc 2. A blower component 6 is rotatably mounted on the offset detection component 5 and is connected to the drive disc 1 when it is idling under overload. When the drive disc 1 reaches a set speed, it centrifugally drives the offset detection component 5 to radially insert into the positioning groove 23. When the drive disc 1 is idling under overload, it drives the blower component 6 to generate a cooling airflow.

[0034] Specifically, the drive disc 1 is coaxially fixed to the output shaft of the washing machine motor and is directly driven to rotate by the motor. The groove 21 on the driven disc 2 is used to install the transmission belt connected to the pulley of the washing machine drum main shaft. The output shaft of the washing machine motor is directly fixed to and drives the drive disc 1 to rotate. The drive disc 1 transmits power to the driven disc 2, which is coaxially arranged, through its overload protection mechanism 4 on its outer periphery. The groove 21 on the outer periphery of the driven disc 2 is used to install the transmission belt (not shown in the figure). The other end of the belt is fitted onto the pulley of the inner tub of the washing machine drum. Therefore, the core function of the driven disc 2 is to receive power from the drive disc 1 and transmit the power to the washing machine drum through the belt, driving the drum to rotate. After washing or spin-drying, the impeller 3 is fixedly connected to the bottom of the driven disc 2 and rotates together with the driven disc 2 to generate cooling airflow. In static or low-speed conditions, the drive disc 1 rotates at a low speed, generating less centrifugal force. The offset detection component 5, under the action of elasticity, remains in its initial retracted position and does not extend radially along the impeller 3. The blower component 6 operates freely under the low-speed rotation of the impeller 3, without generating significant airflow and without contact with the drive disc 1. Under normal high-speed operation, the motor drives the drive disc 1 to rotate at high speed, thereby driving the driven disc 2 and impeller 3 to rotate at high speed together through the meshing overload protection mechanism 4. The driven disc 2 then drives the washing machine drum to rotate at high speed via a transmission belt.At this time, sufficient centrifugal force is generated. This centrifugal force acts on the offset detection component 5, causing it to overcome the corresponding reset pull and slide radially outward. If the impeller 3 and the driven disc 2 are well connected without relative offset or loosening, the overload protection mechanism 4 will accurately insert radially into the positioning groove 23 in the driven disc 2. This ensures the dynamic balance and stable connection between the driven disc 2 and the impeller 3, allowing forced heat dissipation through the rotation of the impeller 3 during the washing machine's operation, thus improving the service life of the internal motor and components. If the connection becomes loose due to a fault, the impeller 3 and the driven disc 2 will experience relative displacement, causing the offset detection component 5 to fail to align and insert into the positioning groove 23 during high-speed motor operation. The system will generate an abnormal warning, thus playing a mechanical monitoring role. Under the idling condition after overload protection, when the drum is overloaded, the overload protection mechanism 4 on the drive disc 1 exits the groove 22 in the driven disc 2, and the drive disc 1 is disconnected from the driven disc 2. Because the driven disc 2 and the impeller 3 are connected to the drum via a belt, they are subjected to huge resistance and rapidly decelerate until they stop. When the impeller 3 stops or rotates at low speed, the drive disk 1 enters an idling state under the drive of the motor. At this time, the offset detection component 5, which stops or rotates at low speed along with the impeller 3, retracts inward under the action of the reset spring due to the disappearance of centrifugal force, causing its end to exit from the positioning groove 23. This retraction action causes the position of the blower component 6 installed on the offset detection component 5 to change accordingly. Its input end contacts the idling drive disk 1 and forms a transmission connection. The high-speed idling drive disk 1 then drives the blower component 6 to rotate at high speed, generating a strong cooling airflow pointing towards the drive disk 1 itself and the motor. This airflow can effectively and quickly remove the heat generated during the overload protection process and during idling, providing active heat dissipation for the motor and transmission system, preventing excessive temperature rise, until user intervention or system reset. It can quickly cut off power when abnormalities such as drum blockage occur, protecting the motor. During high-speed operation, it automatically detects the stability of the connection between the impeller 3 and the driven disk 2, improving safety. Furthermore, it activates the heat dissipation function during the idling stage after overload protection, efficiently and energy-savingly solving the problem of overheating during idling.

[0035] Compared with the prior art, the present invention uses an offset detection component 5 set on the impeller 3 to perform anti-offset detection. During normal washing or spin-drying of the washing machine, the drive disc 1 drives the driven disc 2 to rotate at high speed. The offset detection component 5 will extend radially under the action of centrifugal force. If the impeller 3 and the driven disc 2 are firmly connected, one end of the component will be accurately inserted into the preset positioning groove 23 in the driven disc 2, indicating that the system is operating normally. If offset or loosening occurs, it cannot be inserted in the center, thus providing a real-time mechanical connection status monitoring signal for the system. When a severe overload occurs, the overload protection mechanism 4 will act to disengage the drive disc 1 from the driven disc 2, and the drive disc 1 will enter the idling state. At this time, the blowing component 6 on the offset detection component 5 will reset and form a transmission connection with the idling drive disc 1. The blowing component 6 will force air to be delivered during the idling stage, avoiding local overheating of the motor and extending its service life. The protection, detection and heat dissipation functions are integrated into the impeller 3 component, reducing additional parts and lowering costs.

[0036] In a further technical solution of the present invention, the driven disc 2 and the driving disc 1 cooperate with each other. The outer diameter of the driven disc 2 is larger than that of existing motor pulleys. Specifically, its overall size is larger than the outer diameter of the standard pulley of an existing ordinary washing machine motor. This design directly changes the speed ratio of the entire transmission system, improves washing power, and the greater starting torque makes the inner drum start more quickly and powerfully under load, avoiding repeated attempts or inrush current caused by starting difficulties. With the increased transmission ratio, the motor speed required to achieve the same inner drum speed can be reduced accordingly. More importantly, when transmitting the same power, the effective tension required by the system is reduced, providing users with a powerful washing experience, especially good at handling heavy dirt and large fabrics.

[0037] In a further technical solution of the present invention, a limiting ring 24 is fixedly connected to the bottom of the inner wall of the driven disk 2. One side of the limiting ring 24 contacts the drive disk 1, and the other side contacts the impeller 3. The positioning groove 23 is opened on the inner side of the limiting ring 24. Specifically, the limiting ring 24 and the driven disk 2 are integrally formed into a whole structure, which precisely limits the axial clearance between the drive disk 1 and the impeller 3. This ensures the necessary free rotation space between the components and prevents abnormal noise and wear caused by excessive axial movement. The contact between the bottom surface of the drive disk 1 and the upper surface of the limiting ring 24 plays a certain role in assisting support and stabilizing the rotation of the drive disk 1, making the power transmission more stable. The limiting ring 24 provides a hard and stable mechanical reference, avoiding the position deviation of the positioning groove 23 caused by the deformation of the driven disk 2 body under force.

[0038] In a further technical solution of the present invention, the overload protection mechanism 4 includes a plurality of plug-in pins 41 arranged in a ring and inserted into the drive disk 1. One end of each plug-in pin 41 is fixedly connected to the drive disk 1 with a top spring 42, and the other end is symmetrically provided with abutment grooves 43. The drive disk 1 is provided with guide holes 14 for accommodating the plug-in pins 41 and the top springs 42. Specifically, the shape of the groove 22 on the inner wall of the driven disk 2 matches the contour of the outer end of the plug-in pin 41, and its sidewall is also designed accordingly to be able to abut with the abutment grooves 43. Under normal operating conditions, the top spring 42 pushes the insertion post 41 outward, causing its outer end with the abutment groove 43 to firmly insert into the corresponding groove 22 on the inner wall of the driven disc 2. When the drive disc 1 is driven to rotate by the motor, the power torque generated by the motor is transmitted to the inclined surface of the abutment groove 43 at the outer end of the insertion post 41 through the inclined surface of the groove 22, thereby efficiently driving the driven disc 2 to rotate synchronously. When the washing machine drum stalls and the load resistance torque increases sharply and exceeds the set value, This enormous resistance torque acts in the opposite direction on the groove 22 of the driven disk 2. The inclined surface of the groove 22 generates a huge radial force on the inclined surface of the abutment groove 43 of the insertion post 41. This radial force points in the axial direction of the drive disk 1. When this radial force is greater than the preload of the top spring 42, it will force the insertion post 41 to overcome the elastic force of the top spring 42 and slide inward along the radial guide hole 14 of the drive disk 1. Once the inward displacement of the insertion post 41 is large enough, its outer end will completely slide out of the driven disk 2. The drive disc 1 is dislodged from the groove 22, and the power connection between the drive disc 1 and the driven disc 2 is instantly cut off. The drive disc 1 begins to idle, thus protecting the motor. When the cause of the overload is eliminated, the motor may stop or run at low speed. At this time, the huge radial force acting on the plug post 41 disappears, and the elastic force of the top spring 42 will take over again. It will push the plug post 41 outward again, so that its outer end automatically resets and re-inserts into the groove 22 of the driven disc 2. The entire system returns to a state where it can transmit power normally. This design allows the overload protection mechanism 4 to reset automatically without manual intervention. Its triggering depends directly on the magnitude of the load torque, rather than the change in speed. Therefore, it responds more quickly and accurately to sudden and violent stall. Its working characteristics are less correlated with the speed. Whether the stall occurs in the high-speed spin-drying mode or the low-speed washing mode, it can provide the same effective overload protection.

[0039] In a further technical solution of the present invention, the offset detection component 5 includes several connecting frames 51 arranged in a ring on the bottom surface of the impeller 3. The connecting frames 51 are slidably connected to the impeller 3. A positioning plug block 52 is fixedly connected to one end of the connecting frame 51 near the center of the drive disk 1. A reinforcing ring 31 is fixedly connected to the bottom surface of the impeller 3. A slot 32 for the connecting rod to pass through is opened at the top of the reinforcing ring 31. A return spring 33 is installed in the slot 32. A plug piece 34 is fixedly connected to one end of the return spring 33. The top of the plug piece 34 is inserted into the connecting rod. Specifically, in a static or low-speed condition, the return spring 33 is in a naturally extended or slightly compressed state. Its elastic force is transmitted upward through the plug piece 34, pushing the entire connecting frame 51 assembly and the positioning plug block. 52 moves radially toward the center, causing the positioning plug 52 to disengage from the positioning groove 23 of the limiting ring 24. The blower assembly 6 is in contact with or maintains a small distance from the drive disk 1. When the motor drives the entire assembly to rotate at high speed, a huge centrifugal force acts on the radially distributed connecting frame 51. This centrifugal force overcomes the pre-tightening force of the return spring 33, driving the entire connecting frame 51 and the plug piece 34) to slide outward radially, ultimately causing the positioning plug 52 at its end to be accurately inserted into the positioning groove 23 inside the upper limit ring 24 of the driven disk 2. Only when the impeller 3 and the driven disk 2 are absolutely firmly connected, and the two rotate completely synchronously without relative displacement, can the positioning plug 52 on the impeller 3 be precisely aligned with the positioning groove 23 on the driven disk 2 and be smoothly inserted. If loosening or misalignment occurs, insertion will be impossible, and the system will issue a warning. Once inserted, the engagement of the positioning plug 52 with the positioning groove 23 is equivalent to adding multiple circumferentially distributed rigid connection points between the driven disk 2 and the impeller 3, greatly enhancing the structural rigidity and dynamic balance performance of the driven disk 2 and the impeller 3, making them run more smoothly and quietly during high-speed dehydration. When an overload occurs, the overload protection mechanism 4 will activate, and the driven disk 2 and the impeller 3 will quickly stop rotating, and the centrifugal force will disappear. At this time, the restoring force of the return spring 33 will become the dominant force, pushing the plug plate 34, the connecting frame 51, and the positioning plug 52 to retract radially inward, causing the positioning plug 52 to exit from the positioning groove 23. This inward retraction movement directly drives the blower assembly 6 fixed on the connecting frame 51 to move towards the center, so that it finally contacts the high-speed idling drive disk 1 and is driven to rotate at high speed, thereby generating a strong cooling airflow that blows towards the continuously running motor.

[0040] In a further technical solution of the present invention, a counterweight rod 35 is slidably mounted on the outer side of the impeller 3. Extended blades 36 are mounted at both ends of the counterweight rod 35. The end of the connecting frame 51 near the extended blades 36 is connected to the counterweight rod 35. Specifically, the sliding direction of the counterweight rod 35 is the radial direction of the blades. Extended blades 36 are mounted at both ends of the counterweight rod 35 via a rotating shaft or hinge. The shape of the extended blades 36 matches the aerodynamic profile of the blades of the main impeller 3. They can be retracted and fitted against the surface of the main blades under normal conditions and can be extended when needed. The radial sliding of the connecting frame 51 directly drives the counterweight rod 35 synchronously. During radial sliding, in stationary or low-speed conditions, the push of the return spring 33 causes the connecting frame 51 assembly to be in a radially retracted state. The connecting frame 51 pulls the counterweight rod 35 through the linkage mechanism, causing it to also be in an inward position. At this time, the extended blades 36 installed at both ends of the counterweight rod 35 remain in a retracted state, closely attached to the blades of the main impeller 3. The entire impeller 3 maintains its original aerodynamic shape and sweeping area, operating with low wind resistance and noise, meeting the heat dissipation requirements of the motor under low-speed operation. During normal high-speed operation, the centrifugal force generated by high-speed rotation overcomes the thrust of the return spring 33, pushing... The connecting frame 51 slides radially outward as a whole. Simultaneously, the connecting frame 51 pushes the counterweight rod 35 to slide radially outward along the impeller 3 blades. As the counterweight rod 35 moves outward, the extension blades 36 unfold, ultimately forming an extended airfoil that cooperates with the main blades. The unfolding of the extension blades 36 significantly increases the effective swept area and work capacity of the impeller 3, thereby generating a much stronger cooling airflow than a traditional impeller 3 during the high-speed dehydration stage. This provides extremely enhanced heat dissipation for the motor and transmission system, coping with the heat generated by high loads. The counterweight rod 35 and its extension blades 36 themselves have a considerable mass. The radial outward movement of the connecting frame 51 plays a dynamic balancing role, which can automatically compensate for minor mass imbalances caused by manufacturing errors or uneven distribution of clothing, further suppressing high-speed vibration and improving operational stability. The positioning plug 52 at the outer end of the connecting frame 51 is simultaneously inserted into the positioning slot 23 to realize the original connection reliability detection and rigid locking functions. When an overload occurs, the speed of the driven disc 2 and impeller 3 decreases, the centrifugal force disappears, and the inward retraction of the connecting frame 51 finally triggers the air blowing assembly 6 to engage with the drive disc 1, starting the fixed-point high-efficiency heat dissipation mode, which is specifically for heat dissipation of the motor and the idle drive disc 1.

[0041] In a further technical solution of the present invention, the blower assembly 6 includes a shaft 61 that passes through the connecting frame 51. A friction drive wheel 62 is fixedly connected to the top of the shaft 61, and a heat dissipation fan 63 is fixedly connected to the bottom of the shaft 61. A drive ring 11 that contacts the outer circumferential surface of the friction drive wheel 62 is fixedly connected to the bottom of the drive disc 1. A receiving ring 39 is fixedly connected to the middle of the impeller 3. Several balls are provided between the receiving ring 39 and the drive ring 11. Specifically, the drive ring 11 is integrally formed with the drive disc 1 and is located on the rotation trajectory of the friction drive wheel 62. The side of the drive ring 11 serves as the friction drive surface, and its material hardness matches that of the friction drive wheel 62 to ensure sufficient friction. When an overload occurs and the power is cut off, the driven disc 2 and the impeller 3 stop, the centrifugal force disappears, and the connecting frame 51, under the action of the return spring 33, drives the entire blower. Component 6 moves rapidly radially inward. This inward contraction causes the cooling fan 63, which was originally on the periphery, to be moved to a position closer to the center of the drive disk 1 and the motor output shaft. At the same time, the contact pressure between the friction transmission wheel 62 and the transmission ring 11 increases due to the change in position. Even if the idle speed of the drive disk 1 may be lower than the normal dehydration speed, the airflow generated by the cooling fan 63, which is now precisely positioned in the core area of ​​the heat source, is concentrated, direct, and efficient, blowing onto the overheated drive disk 1. This achieves directional and powerful air cooling, greatly improving heat dissipation efficiency and quickly removing the heat generated during idle operation. Under normal operation, the drive disk 1 rotates synchronously with the driven disk 2 and the impeller 3. Under the action of centrifugal force, the position of the air blowing component 6 cannot contact the transmission ring 11, thus avoiding unnecessary increases in power consumption during normal operation.

[0042] In a further technical solution of the present invention, an annular anti-detachment cover 25 is installed on the top of the driven disk 2. The bottom of the annular anti-detachment cover 25 is in contact with the top surface of the drive disk 1. A bushing 12 is fixedly connected to the center of the drive disk 1. The top of the bushing 12 passes through the annular anti-detachment cover 25. Specifically, the bushing 12 is used to make a tight fit connection with the motor output shaft to transmit torque. The top of the bushing 12 extends upward and passes through the central hole of the annular anti-detachment cover 25. An oil seal or sealing ring can be installed at the point where the bushing 12 passes through the annular anti-disengagement cover 25 to prevent grease leakage or dust ingress. During motor start-up, shutdown, or sudden load changes, the drive disc 1 may be subjected to axial impact or vibration, causing a tendency for axial movement. The bottom end face of the annular anti-disengagement cover 25 contacts the top surface of the drive disc 1, forming an axial stop surface. This effectively prevents excessive upward axial displacement of the drive disc 1 under abnormal conditions, and even the risk of it disengaging from the driven disc 2. This ensures that the overload protection mechanism 4 is always in the correct engagement or disengagement position, guaranteeing functional reliability. The sliding contact between the annular anti-disengagement cover 25 and the top surface of the drive disc 1... The contact ring 25, together with the bottom limiting ring 24, forms a double-sided axial limiting structure, stably constraining the drive disk 1 in the designed axial position. This stable constraint ensures that the rotation axes of the drive disk 1 and the driven disk 2 always remain highly aligned, reducing vibration and noise caused by axial sway and improving the smoothness during high-speed operation. At the moment when the plug 41 disengages from the groove 22, the drive disk 1 may be subjected to a small axial reaction force. The annular anti-disengagement cover 25 can immediately absorb this force, preventing the drive disk 1 from axially jumping, ensuring a clean and crisp separation action, and avoiding repeated impacts or re-engagement.

[0043] In a further technical solution of the present invention, a compression spring 26 is installed at the bottom of the annular anti-detachment cover 25, and a brake buffer ring 27 is fixedly connected to the bottom of the compression spring 26. A washer ring 13 that contacts the brake buffer ring 27 is embedded at the top of the drive disc 1. Specifically, during normal power transmission, the drive disc 1 and the driven disc 2 rotate synchronously at high speed. At this time, under the pressure of the compression spring 26, the brake buffer ring 27 keeps in contact with the washer ring 13 on the drive disc 1 and slides accordingly, generating slight sliding friction. This sliding friction will generate a small, continuous reverse torque, which forms a beneficial damping effect on the rotating system, helps to suppress slight torque fluctuations and vibrations, and makes the operation smoother. When the torque is overloaded and the plug post 41 begins to disengage from the groove 22, a violent relative motion tendency and possible impact will be generated between the drive disc 1 and the driven disc 2. At this time, the sliding friction between the brake buffer ring 27 and the washer ring 13 will increase instantaneously, forming a significant braking resistance torque. This resistance torque can effectively consume the huge energy generated by overload and impact, reduce the severity of power interruption, and act as a buffer to make the separation action smoother and more stable, avoid hard impact between mechanisms, protect key components such as the plug post 41 and groove 22, and extend their service life. The continuous friction will form a gentle braking torque on the idling drive disc 1, which helps to suppress the excessive increase of its idling speed and keep the idling in a relatively low and safe speed range.

[0044] In a further technical solution of the present invention, multiple sets of reinforcing ribs 37 are distributed in a ring on the outer side of the impeller 3. Each set of reinforcing ribs 37 is arranged radially, and the top of the reinforcing ribs 37 is provided with an insertion hole 38 for the connecting frame 51 to pass through. Specifically, the shape of the insertion hole 38 matches the cross-sectional shape of the connecting frame 51, providing precise and full-process guidance and support for the radial sliding of the connecting frame 51, greatly enhancing the bending and deformation resistance of the root of the impeller 3, and preventing the blades of the impeller 3 from fatigue fracture or plastic deformation due to insufficient strength.

[0045] A washing machine includes the aforementioned impeller 3 assembly for a washing machine motor. Specifically, the washing machine includes a motor, a washing drum, and a transmission system connecting the motor and the drum. The core of the transmission system is the impeller 3 assembly. The motor is fixedly installed at the bottom of the washing machine housing, and its output shaft is fixedly connected to the bushing 12 of the drive disc 1 in the impeller 3 assembly via a key connection or other means, for directly driving the drive disc 1 to rotate. The rotating shaft pulley of the washing drum is connected to the wheel groove 21 on the outer periphery of the driven disc 2 in the impeller 3 assembly via a transmission belt. Therefore, the rotational movement of the driven disc 2 directly drives the washing drum to rotate via the belt.

[0046] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A fan impeller assembly for a washing machine motor, comprising a drive disc (1), characterized in that, Also includes: The driven disk (2) is coaxially arranged with the drive disk (1) and has a wheel groove (21) for installing the transmission belt. An impeller (3) is fixedly connected to the bottom of the driven disk (2). An overload protection mechanism (4) is elastically inserted into the outer periphery of the drive disk (1), and a groove (22) is provided on the inner wall of the driven disk (2) for the overload protection mechanism (4) to be inserted. The offset detection component (5) is elastically slidably mounted on the bottom surface of the impeller (3). The driven disk (2) has a positioning groove (23) that matches one end of the offset detection component (5). The offset detection component (5) is rotatably mounted with a blower component (6), which is connected to the drive disk (1) when it is overloaded and running idle. When the speed of the drive disk (1) reaches the set value, the centrifugal drive offset detection component (5) is radially inserted into the positioning groove (23). When the drive disk (1) is overloaded and idles, it drives the blower component (6) to generate heat dissipation airflow.

2. The impeller assembly for a washing machine motor according to claim 1, characterized in that, A limiting ring (24) is fixedly connected to the bottom of the inner wall of the driven disk (2). One side of the limiting ring (24) is in contact with the drive disk (1), and the other side is in contact with the impeller (3). The positioning groove (23) is opened on the inner side of the limiting ring (24).

3. The impeller assembly for a washing machine motor according to claim 1, characterized in that, The overload protection mechanism (4) includes several plug-in pins (41) arranged in a ring and inserted into the drive disk (1). One end of the plug-in pin (41) is fixedly connected to the drive disk (1) with a top spring (42), and the other end is symmetrically provided with abutment grooves (43).

4. The impeller assembly for a washing machine motor according to claim 1, characterized in that, The offset detection component (5) includes several connecting frames (51) distributed in a ring on the bottom surface of the impeller (3). A positioning plug block (52) is fixedly connected to one end of the connecting frame (51) near the center of the drive disk (1). A reinforcing ring (31) is fixedly connected to the bottom surface of the impeller (3). A slot (32) for the connecting rod to pass through is opened on the top of the reinforcing ring (31). A reset spring (33) is installed in the slot (32). A plug piece (34) is fixedly connected to one end of the reset spring (33). The top of the plug piece (34) is plugged into the connecting rod.

5. The impeller assembly for a washing machine motor according to claim 4, characterized in that, A counterweight rod (35) is slidably mounted on the outside of the impeller (3). Extended blades (36) are mounted on both ends of the counterweight rod (35). The end of the connecting frame (51) near the extended blades (36) is connected to the counterweight rod (35).

6. The impeller assembly for a washing machine motor according to claim 4, characterized in that, The blower assembly (6) includes a shaft (61) that passes through the connecting frame (51), a friction drive wheel (62) is fixedly connected to the top of the shaft (61), a heat dissipation fan (63) is fixedly connected to the bottom of the shaft (61), and a drive ring (11) that contacts the outer circumferential surface of the friction drive wheel (62) is fixedly connected to the bottom of the drive disc (1).

7. The impeller assembly for a washing machine motor according to claim 1, characterized in that, The driven disk (2) is equipped with an annular anti-detachment cover (25) at the top. The bottom of the annular anti-detachment cover (25) is in contact with the top surface of the drive disk (1). A bushing (12) is fixedly connected to the center of the drive disk (1). The top of the bushing (12) passes through the annular anti-detachment cover (25).

8. The impeller assembly for a washing machine motor according to claim 7, characterized in that, The bottom of the annular anti-detachment cover (25) is equipped with a compression spring (26), and the bottom of the compression spring (26) is fixedly connected with a brake buffer ring (27). The top of the drive disc (1) is fitted with a washer ring (13) that contacts the brake buffer ring (27).

9. A fan impeller assembly for a washing machine motor according to claim 1, characterized in that, The impeller (3) has multiple sets of reinforcing ribs (37) arranged in a ring on the outer side. Each set of reinforcing ribs (37) is arranged radially, and the top of the reinforcing ribs (37) has an insertion hole (38) for the connecting frame (51) to pass through.

10. A washing machine, characterized in that, Includes the impeller assembly for a washing machine motor as described in any one of claims 1-9.

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