A washing shaft for a washing machine

Abstract

The utility model discloses a kind of washing shafts for washing machine;Belong to washing machine accessory technical field;Its technical key points include washing shaft main body, the top end of the washing shaft main body is fixedly connected with the coaxial arrangement pulsator shaft, the first cavity and the second cavity of distribution are opened in the pulsator shaft inside, vertically arranged double-end threaded rod is rotatably connected in the second cavity middle part, two lifting discs of distribution are threadedly connected on the double-end threaded rod.The utility model completely avoids the problem that bolt is easy to loosen and fall under the action of high-frequency vibration and centrifugal force by abandoning the traditional clamping structure relying on bolt, using the driving mode of double-end threaded rod, lifting disc and push rod linkage, ensure that the clamping stability of clamping block to pulsator is not affected by long-term use, effectively prevent the connection failure of pulsator and washing shaft, reduce washing machine whole machine vibration, noise and component damage risk, significantly improve the reliability and service life of washing shaft.

Description

Technical Field

[0001] This utility model relates to the field of washing machine accessories technology, specifically a washing shaft for a washing machine. Background Technology

[0002] Generally, washing machines are mainly divided into top-loading (pulsator) washing machines and front-loading (drum) washing machines. Front-loading washing machines operate the drum by changing the spin speed and torque, thus applying washing and spin-drying modes. In the case of a top-loading washing machine, the drum's rotation is stopped while the laundry is inside, and the pulsator inside the drum rotates to create water flow, thus performing the washing mode. In the spin-drying mode, the drum rotates, causing the clothes inside to be dehydrated by centrifugal force.

[0003] For example, Chinese patent CN216891620U discloses a washing shaft, including a shaft body. The shaft body includes a washing shaft main body, a pulsator connecting unit fixedly connected to the top of the washing shaft main body, and a gear frame connecting unit fixedly connected to the bottom of the washing shaft main body. The pulsator connecting unit includes a pulsator shaft, a pulsator connecting section fixedly connected to the surface of the pulsator shaft, a groove formed on the inner side wall of the pulsator shaft, a snap-fit ​​component slidably connected to the inner side wall of the groove, and a return spring fixedly connected to the inner side wall of the snap-fit ​​component. In this washing shaft, the pulsator connecting section is serrated, which facilitates the connection between the pulsator and the pulsator shaft and increases torque, improving the stability of the connection between the pulsator shaft and the pulsator. After the bolt is inserted into the pulsator, it is threaded into the mounting hole on the surface of the pulsator shaft. When the bolt moves downward, it pushes two push blocks to compress the return spring, thereby pushing the snap-fit ​​component to engage with the snap-fit ​​groove on the inner wall of the pulsator, further improving the stability of the pulsator and the pulsator shaft.

[0004] However, in practical applications, the existing bolt-based snap-fit ​​structure of the washing shaft has significant drawbacks. In spin-drying mode, the washing shaft needs to drive the impeller to rotate at high speed, at which point the bolt will continuously bear high-frequency centrifugal force and vibration load. Since the threaded connection between the bolt and the mounting hole relies solely on mechanical meshing, long-term high-frequency vibration can easily cause the threaded pair to loosen, or even the bolt to fall off completely. Loosening of the bolt will directly cause the locking block to lose its driving force, which in turn will lead to the failure of the connection between the impeller and the washing shaft. This not only affects the spin-drying effect, but may also cause the entire washing machine to vibrate and increase noise due to the swaying of the impeller. In severe cases, it may even damage the washing tub or other components, posing a safety hazard. Moreover, the contact area between the bolt and the push block is prone to wear under long-term force and friction, further aggravating the loosening tendency of the bolt. Furthermore, the return spring may experience elastic fatigue during repeated compression and rebound, resulting in a decrease in the reset accuracy of the locking block, indirectly increasing the stress burden on the bolt. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a washing shaft for a washing machine. This technical solution solves the significant defects of the existing washing shaft's bolt-based snap-fit ​​structure mentioned in the background art. In spin-drying mode, the washing shaft needs to drive the pulsator to rotate at high speed, during which the bolt continuously bears high-frequency centrifugal force and vibration loads. Since the threaded connection between the bolt and the mounting hole relies solely on mechanical engagement, long-term high-frequency vibration can easily lead to loosening of the threaded pair, or even complete bolt detachment. Loosening of the bolt directly causes the snap-fit ​​block to lose its driving force, resulting in the failure of the connection between the pulsator and the washing shaft. This not only affects the spin-drying effect but may also cause vibration and increased noise in the entire washing machine due to pulsator wobbling, and in severe cases, may even damage the washing tub or other components, posing a safety hazard. Furthermore, the contact area between the bolt and the push block is prone to wear under long-term friction, further exacerbating the bolt's loosening tendency. Additionally, the return spring may experience elastic fatigue during repeated compression and rebound, leading to a decrease in the snap-fit ​​block's reset accuracy and indirectly increasing the stress burden on the bolt.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A washing shaft for a washing machine includes a washing shaft body. A coaxial impeller shaft is fixedly connected to the top of the washing shaft body. The impeller shaft has a first cavity and a second cavity arranged vertically. A vertically arranged double-threaded rod is rotatably connected to the middle of the second cavity. Two lifting discs are threadedly connected to the double-threaded rod. Several vertical rods arranged in a circular array around the double-threaded rod are also fixedly connected to the second cavity. The lifting discs are slidably connected to each vertical rod. Several push rods arranged in a circular array are hinged to each of the two lifting discs. The push rods hinged to the two lifting discs correspond one-to-one. One end of each of the two corresponding push rods is hinged to a locking block. A through groove is provided on the impeller shaft for the locking block to move laterally. A transmission component and a drive component are provided in the first cavity. The transmission component is connected to both the drive component and the double-threaded rod.

[0008] Preferably, the transmission assembly includes a rotating rod rotatably connected to the first cavity and arranged horizontally, a first bevel gear fixedly connected to the rotating rod, the top end of the double-threaded rod extending into the first cavity and fixedly connected to a second bevel gear meshing with the first bevel gear, and the drive assembly being connected to the rotating rod.

[0009] Preferably, the drive assembly includes a worm gear rotatably connected to the first cavity and arranged vertically, a worm wheel meshing with the worm gear is fixedly connected to the rotating rod, a turntable is fixedly connected to the top of the worm gear, and a slot is formed on the top of the turntable.

[0010] Preferably, the top of the impeller shaft is provided with a circular flush groove coaxial with the turntable, the turntable is located in the circular flush groove, and the inner wall of the circular flush groove is provided with a rubber friction ring adapted to the turntable, and the outer ring of the turntable is in close contact with the inner ring of the rubber friction ring.

[0011] Preferably, the impeller shaft is fixedly connected to a plurality of guide reinforcing blocks arranged in a ring array. The number of guide reinforcing blocks is the same as the number of locking blocks. Each guide reinforcing block is located between two adjacent locking blocks. The plurality of guide reinforcing blocks and the plurality of locking blocks are arranged in a ring array. The surface of the guide reinforcing blocks is shot peened.

[0012] Preferably, a fixing ring is fixedly connected to the middle of several vertical rods, and a reinforcing slider corresponding to each locking block is fixedly connected to the outer ring of the fixing ring. A reinforcing groove adapted to the reinforcing slider is opened on one side of the locking block, and each reinforcing slider is slidably connected to the corresponding reinforcing groove.

[0013] Preferably, a sealing sleeve is provided on the outside of the card block, the sealing sleeve is made of fluororubber, and the sealing sleeve covers the gap between the through groove and the card block.

[0014] Preferably, both the surface of the vertical rod and the surface of the reinforcing slider are nitrided.

[0015] Compared with the prior art, the present invention provides a washing shaft for a washing machine, which has the following beneficial effects:

[0016] 1. This utility model, by abandoning the traditional bolt-dependent snap-fit ​​structure, adopts a drive method that links a double-headed threaded rod, lifting plate, and push rod, completely avoiding the problem of bolts easily loosening and falling off under high-frequency vibration and centrifugal force. This ensures that the snap-fit ​​stability of the snap-fit ​​block to the impeller is not affected by long-term use, effectively preventing the connection failure between the impeller and the washing shaft, reducing the risk of vibration, noise, and component damage to the entire washing machine, and significantly improving the reliability and service life of the washing shaft.

[0017] 2. This utility model achieves deceleration and self-locking through worm gear transmission, and with the positioning effect of the rubber friction ring, ensures the stability of the locking block drive structure. By strengthening the guide of the slider and the groove, the support of the vertical rod and the fixed ring, and the surface nitriding treatment, the accuracy of the locking block movement and the wear resistance of the components are enhanced. This solves the problem of reduced locking accuracy caused by bolt wear and return spring fatigue in traditional structures, and further optimizes the overall performance of the washing shaft. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0019] Figure 2 In this utility model Figure 1 Enlarged view of point A;

[0020] Figure 3 This is a cross-sectional view of the impeller shaft in this utility model;

[0021] Figure 4 This is a schematic diagram of the transmission component and drive component in this utility model.

[0022] The following components are labeled in the diagram: 1. Washing shaft body; 2. Impeller shaft; 3. First cavity; 4. Second cavity; 5. Double-threaded rod; 6. Lifting plate; 7. Push rod; 8. Clamping block; 9. Transmission assembly; 901. Rotating rod; 902. First bevel gear; 903. Second bevel gear; 10. Drive assembly; 1001. Worm gear; 1002. Worm wheel; 1003. Turntable; 1004. Slotted groove; 11. Rubber friction ring; 12. Guide reinforcing block; 13. Vertical rod; 14. Fixing ring; 15. Reinforcing slider; 16. Reinforcing groove; 17. Through groove; 18. Sealing sleeve. Detailed Implementation

[0023] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0024] Example 1

[0025] Please refer to Figures 1 to 4 As shown, a washing shaft for a washing machine includes a washing shaft body 1. A pulsator shaft 2 is coaxially connected to the top of the washing shaft body 1. The pulsator shaft 2 has a first cavity 3 and a second cavity 4 distributed vertically inside. A vertically arranged double-threaded rod 5 is rotatably connected to the middle of the second cavity 4. Two lifting plates 6 are threadedly connected to the double-threaded rod 5. Several vertical rods 13 are also fixedly connected to the second cavity 4 in a circular array around the double-threaded rod 5. The lifting plates 6 are slidably connected to each vertical rod 13. Several push rods 7 are hinged to the two lifting plates 6 in a circular array. The push rods 7 hinged to the two lifting plates 6 correspond one-to-one. One end of the two corresponding push rods 7 is hinged to a locking block 8. The pulsator shaft 2 has a through groove 17 for the locking block 8 to move laterally. A transmission component 9 and a drive component 10 are arranged in the first cavity 3. The transmission component 9 is connected to both the drive component 10 and the double-threaded rod 5.

[0026] Those skilled in the art will understand that the transmission assembly 9 in the first cavity 3 is connected to the drive assembly 10 and the double-ended threaded rod 5. The drive assembly 10 drives the double-ended threaded rod 5 to rotate through the transmission assembly 9, causing the two lifting discs 6 to rise and fall in opposite directions along the vertical rod 13, pushing the push rod 7 to drive the locking block 8 to extend and retract laterally, thereby achieving engagement or disengagement with the impeller.

[0027] The system adopts a linkage structure of double-threaded rod 5, lifting plate 6 and push rod 7 to replace the traditional bolt drive, avoiding the problem of bolt loosening and falling off, ensuring stable connection between impeller and washing shaft, and reducing the risk of vibration, noise and component damage caused by connection failure.

[0028] Example 2

[0029] Furthermore, the transmission assembly 9 includes a rotating rod 901 rotatably connected within the first cavity 3 and arranged horizontally, a first bevel gear 902 fixedly connected to the rotating rod 901, the top end of the double-threaded rod 5 extending into the first cavity 3 and fixedly connected to a second bevel gear 903 meshing with the first bevel gear 902, and the drive assembly 10 connected to the rotating rod 901.

[0030] Those skilled in the art will understand that when the drive assembly 10 drives the rotating rod 901 to rotate, the first bevel gear 902 meshes with the second bevel gear 903, converting the horizontal rotation into the vertical rotation of the double-ended threaded rod 5, thereby realizing the lifting drive of the lifting plate 6.

[0031] The vertical conversion of power direction is achieved through a bevel gear set, which has high transmission efficiency and compact structure, ensuring that the power of the drive component 10 is stably transmitted to the double-headed threaded rod 5, and improving the accuracy of the extension and retraction of the locking block 8.

[0032] Example 3

[0033] Furthermore, the drive assembly 10 includes a worm gear 1001 rotatably connected within the first cavity 3 and arranged vertically, a worm wheel 1002 meshing with the worm gear 1001 fixedly connected to the rotating rod 901, a turntable 1003 fixedly connected to the top of the worm gear 1001, and a slot 1004 formed on the top of the turntable 1003.

[0034] Those skilled in the art will understand that by inserting a tool into the slot 1004 to rotate the turntable 1003, the worm gear 1001 is rotated. The worm gear 1001 meshes with the worm wheel 1002 to drive the rotating rod 901 to rotate, which in turn drives the double-threaded rod 5 to rotate through the transmission assembly 9.

[0035] The meshing of the worm 1001 and the worm wheel 1002 has a self-locking function, which can prevent the double-threaded rod 5 from rotating in the opposite direction, and ensure that the locking block 8 maintains a stable telescopic position in the working state, avoiding loosening of the locking due to vibration.

[0036] Example 4

[0037] Furthermore, the top of the impeller shaft 2 is provided with a circular flush groove coaxially arranged with the turntable 1003. The turntable 1003 is located in the circular flush groove. The inner wall of the circular flush groove is provided with a rubber friction ring 11 that is adapted to the turntable 1003. The outer ring of the turntable 1003 is in close contact with the inner ring of the rubber friction ring 11.

[0038] Those skilled in the art will understand that when rotating the turntable 1003, the frictional force of the rubber friction ring 11 must be overcome. After rotation, the frictional force prevents the turntable 1003 from rotating on its own when not in operation. The rubber friction ring 11 enhances the positioning stability of the turntable 1003, preventing the turntable 1003 from rotating unexpectedly due to vibrations during washing machine operation, further ensuring the self-locking effect of the worm gear 1001 and the worm wheel 1002, and ensuring the stable engagement state of the locking block 8.

[0039] Example 5

[0040] Furthermore, the impeller shaft 2 is fixedly connected to a number of guide reinforcing blocks 12 arranged in a ring array. The number of guide reinforcing blocks 12 is the same as the number of locking blocks 8. Each guide reinforcing block 12 is located between two adjacent locking blocks 8. The guide reinforcing blocks 12 and the locking blocks 8 are arranged in a ring array. The surface of the guide reinforcing blocks 12 is shot peened.

[0041] Those skilled in the art will understand that the guide reinforcement block 12 serves as a guide during impeller installation and enhances the external structural strength of the impeller shaft 2. The guide reinforcement block 12 facilitates quick alignment and installation of the impeller, and the shot peening treatment improves its surface hardness and wear resistance, extending its service life. At the same time, its spacing with the locking block 8 enhances the overall rigidity of the connection between the impeller shaft 2 and the impeller, reducing deformation under stress.

[0042] Example 6

[0043] Furthermore, a fixing ring 14 is fixedly connected to the middle of several vertical rods 13. A reinforcing slider 15 corresponding to each of the locking blocks 8 is fixedly connected to the outer ring of the fixing ring 14. A reinforcing groove 16 adapted to the reinforcing slider 15 is opened on one side of the locking block 8. Each reinforcing slider 15 is slidably connected to the corresponding reinforcing groove 16.

[0044] As will be understood by those skilled in the art, when the locking block 8 extends or retracts laterally, the reinforcing slider 15 slides along the reinforcing groove 16, restricting the movement trajectory of the locking block 8. The cooperation between the reinforcing slider 15 and the reinforcing groove 16 enhances the stability and accuracy of the lateral movement of the locking block 8, preventing the locking block 8 from failing due to force deviation; the fixing ring 14 also strengthens the overall structure of the vertical rod 13, improving its support strength.

[0045] Example 7

[0046] Furthermore, a sealing sleeve 18 is provided on the outside of the card block 8. The sealing sleeve 18 is made of fluororubber and covers the gap between the through groove 17 and the card block 8.

[0047] Those skilled in the art will understand that the sealing sleeve 18 deforms synchronously with the locking block 8 when it extends and retracts, preventing external moisture and impurities from entering the second cavity 4. The fluororubber material is resistant to aging and high and low temperatures, effectively preventing water and stains from entering the cavity, avoiding corrosion or jamming of components such as the vertical rod 13 and the double-threaded rod 5, and extending the service life of the washing shaft.

[0048] Example 8

[0049] Furthermore, the surfaces of the vertical rod 13 and the reinforcing slider 15 are both nitrided.

[0050] Those skilled in the art will understand that the surfaces of the vertical rod 13 and the reinforced slider 15 are nitrided to form a high-hardness nitrided layer, which enhances the surface wear resistance and fatigue resistance. The nitriding treatment improves the wear resistance of the friction pair between the vertical rod 13 and the lifting plate 6, and between the reinforced slider 15 and the reinforced slide groove 16, reduces wear caused by long-term sliding, ensures smooth movement of components, and extends the service life of the overall structure.

[0051] The working principle and usage procedure of this device are as follows: During use, a tool is inserted into the slot 1004 at the top of the turntable 1003 and rotated, causing the worm gear 1001 to rotate. The worm gear 1001 meshes with the worm wheel 1002 on the rotating rod 901, causing the rotating rod 901 and the first bevel gear 902 to rotate. The first bevel gear 902 meshes with the second bevel gear 903 at the top of the double-threaded rod 5, driving the double-threaded rod 5 to rotate within the second cavity 4. This, in turn, causes the two lifting discs 6 to rise and fall in the opposite direction along the vertical rod 13 of the circular array. The push rod 7 pushes the locking block 8 to extend and retract laterally along the through groove 17. At the same time, the locking block 8 maintains stability through the sliding engagement of the reinforcing slide groove 16 and the reinforcing slider 15 on the fixing ring 14. The sealing sleeve 18 deforms synchronously to seal the gap of the through groove 17. When installing the impeller, the guide reinforcing block 12 assists in positioning. The locking block 8 extends out and engages with the inner wall of the impeller. The friction between the rubber friction ring 11 and the turntable 1003 and the self-locking property of the worm gear 1001 and worm wheel 1002 ensure stable engagement. When disassembling, rotating the turntable 1003 in the opposite direction will cause the locking block 8 to retract and disengage from the impeller.

[0052] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A washing shaft for a washing machine, comprising a washing shaft body (1), characterized in that, The washing shaft body (1) is fixedly connected to a coaxial impeller shaft (2) at its top. The impeller shaft (2) has a first cavity (3) and a second cavity (4) distributed vertically inside. A vertically arranged double-headed threaded rod (5) is rotatably connected to the middle of the second cavity (4). Two vertically arranged lifting discs (6) are threaded onto the double-headed threaded rod (5). Several vertical rods (13) arranged in a ring array around the double-headed threaded rod (5) are also fixedly connected inside the second cavity (4). The lifting discs (6) and each vertical rod (13) are connected to each vertical rod (13). 13) Sliding connection, both of the two lifting plates (6) are hinged with a number of push rods (7) arranged in a ring array, and the push rods (7) hinged on the two lifting plates (6) are all one-to-one corresponding, and one end of the two corresponding push rods (7) is hinged with a locking block (8). The impeller shaft (2) is provided with a through groove (17) for the locking block (8) to move laterally. The first cavity (3) is provided with a transmission component (9) and a drive component (10). The transmission component (9) is connected to the drive component (10) and the double-headed threaded rod (5) at the same time.

2. A washing shaft for a washing machine according to claim 1, characterized in that, The transmission assembly (9) includes a rotating rod (901) rotatably connected in the first cavity (3) and arranged horizontally. A first bevel gear (902) is fixedly connected to the rotating rod (901). The top end of the double-threaded rod (5) extends into the first cavity (3) and is fixedly connected to a second bevel gear (903) that meshes with the first bevel gear (902). The drive assembly (10) is connected to the rotating rod (901).

3. A washing shaft for a washing machine according to claim 2, characterized in that, The drive assembly (10) includes a worm gear (1001) rotatably connected in the first cavity (3) and arranged vertically. A worm wheel (1002) meshing with the worm gear (1001) is fixedly connected to the rotating rod (901). A turntable (1003) is fixedly connected to the top of the worm gear (1001). A slot (1004) is formed on the top of the turntable (1003).

4. A washing shaft for a washing machine according to claim 3, characterized in that, The top of the impeller shaft (2) is provided with a circular flush groove coaxial with the turntable (1003). The turntable (1003) is located in the circular flush groove. The inner wall of the circular flush groove is provided with a rubber friction ring (11) adapted to the turntable (1003). The outer ring of the turntable (1003) and the inner ring of the rubber friction ring (11) are closely fitted.

5. A washing shaft for a washing machine according to claim 1, characterized in that, The impeller shaft (2) is fixedly connected to a number of guide reinforcing blocks (12) arranged in a ring array. The number of guide reinforcing blocks (12) is the same as the number of locking blocks (8). Each guide reinforcing block (12) is located between two adjacent locking blocks (8). The guide reinforcing blocks (12) and the locking blocks (8) are arranged in a ring array. The surface of the guide reinforcing blocks (12) is shot peened.

6. A washing shaft for a washing machine according to claim 1, characterized in that, A fixing ring (14) is fixedly connected to the middle of several vertical rods (13). A reinforcing slider (15) corresponding to each of the locking blocks (8) is fixedly connected to the outer ring of the fixing ring (14). A reinforcing groove (16) adapted to the reinforcing slider (15) is opened on one side of the locking block (8). Each reinforcing slider (15) is slidably connected to the corresponding reinforcing groove (16).

7. A washing shaft for a washing machine according to claim 1, characterized in that, The card block (8) is provided with a sealing sleeve (18) on the outside. The sealing sleeve (18) is made of fluororubber and covers the gap between the through groove (17) and the card block (8).

8. A washing shaft for a washing machine according to claim 6, characterized in that, The surfaces of the vertical rod (13) and the reinforcing slider (15) are both nitrided.

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