Rotor of drainage pump of washing machine

Abstract

The utility model discloses a washing machine draining pump rotor, comprising a second magnetic ring assembly; the second bearing is connected to a second central shaft on the second magnetic ring assembly; the impeller structure is connected to the second central shaft, and one end of the impeller structure is in contact with the side wall of the second bearing; the impeller structure comprises a second coupling connected to the second central shaft and spaced from the second bearing; the middle of the second impeller sleeves the second coupler, one end of the second impeller is connected with the second coupler, and the other end of the second impeller extends towards the second bearing; the second damping rubber is connected between the second coupler and the second impeller; the second clamping piece is arranged between the second bearing and the second impeller; the second clamping piece sealing ring is connected to the second clamping piece and surrounds the second central shaft; the second impeller and the second clamping piece are connected into a whole; therefore, the technical problems that the structural reliability between the clamping piece and the impeller is poor, the clamping piece is cracked and damaged, the clamping piece and the impeller are pulled off, and noise is large are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of washing machine drain pumps, in particular to a rotor of a washing machine drain pump. Background Technique

[0002] Generally, a drain pump is installed on a washing machine, and its function is to drain water. Among them, the rotor is an important component on the drain pump. The operating reliability of the rotor plays a decisive role in whether the drainage is smooth.

[0003] The structure of the existing drain pump rotor generally includes: a first magnetic ring assembly 100, a first bearing 200, a first card seal ring 300, a first card 400, a first coupling 500, a coupling seal ring 600, a first shock-absorbing rubber 700 and a first impeller 800.

[0004] The first bearing 200 is connected to the first central shaft 101 on the first magnetic ring assembly 100; the coupling seal ring 600 is connected to the first coupling 500 and cooperates with the first coupling 500 and the first shock-absorbing rubber 700 in the first impeller 800; the first card seal ring 300 is connected to the first card 400; the first card 400 is connected between the step surface 801 and the rib 802 on the first impeller 800.

[0005] After the combination of the first card seal ring 300, the first card 400, the first coupling 500, the coupling seal ring 600, the first shock-absorbing rubber 700 and the first impeller 800, they are together connected to the first central shaft 101 and rotate together with the first magnetic ring assembly 100.

[0006] Since the first card 400 and the first impeller 800 are separately arranged, and both the first card 400 and the first impeller 800 are injection-molded parts, the selected plastic material needs to be installed and produced in an environment of 10 - 30°C. If the ambient temperature is not controlled, due to the principle of thermal expansion and contraction of injection-molded parts, deformation occurs at the rib 802. For example: the inner diameter C of the rib 802 in the prior art is 14 mm, and the outer diameter D of the first card 400 is 14.5 mm. Therefore, the unilateral interference amount of the outer diameter D of the first card 400 is 0.25 mm. When the first impeller 800 is in a low-temperature environment (less than 10°C), the inner diameter C of the rib 802 becomes smaller, making the unilateral interference amount of the outer diameter D of the first card 400 > 0.25 mm. The larger the interference amount, the more difficult it is for the first card 400 to be stuck between the step surface 801 and the rib 802 during the assembly of the first card 400 and the first impeller 800, and the first card 400 may crack and be damaged.

[0007] Conversely, when the first impeller 800 is in a high-temperature environment (greater than 30 °C), the inner diameter C of the rib 802 becomes larger, making the unilateral interference of the outer diameter D of the first card 400 < 0.25 mm. The smaller the interference, the smaller the pull-off force between the first card 400 and the first impeller 800. When there is a foreign object wrapped around the first impeller 800 in the washing machine, due to the reduced pull-off force, the first impeller 800 is easily pulled off. Seriously, it cannot drain water normally, shortening the service life of the drain pump;

[0008] Moreover, since both the first card 400 and the first impeller 800 are injection-molded parts, it is impossible to ensure absolutely precise dimensions and shapes during injection molding. There will be some tiny gaps and protrusions after they are assembled, resulting in poor sealing. After using for a period of time, the grease inside the first impeller 800 will gradually leak due to poor sealing. Seriously, the noise will become louder. Utility Model Content

[0009] Aiming at the above deficiencies in the related art, the purpose is to provide a rotor of a washing machine drain pump to solve the technical problems of poor structural reliability between the card and the impeller in the related art, such as cracking and damage of the card, pull-off between the card and the impeller, and loud noise.

[0010] The technical solution to achieve the purpose is: a rotor of a washing machine drain pump, including: a second magnetic ring assembly; and a second bearing connected to a second central shaft of the second magnetic ring assembly; further including: an impeller structure connected to the second central shaft, with one end in contact with the side wall of the second bearing;

[0011] The impeller structure includes: a second coupling connected to the second central shaft and spaced from the second bearing; a second impeller with its middle part sleeved on the second coupling, surrounding the second coupling, one end connected to the second coupling, and the other end extending towards the second bearing and spaced from the second bearing; a second shock-absorbing rubber connected between the second coupling and the second impeller; a second card surrounding the second central shaft, arranged between the second bearing and the second impeller, and in contact with one side wall of the second bearing; and a second card sealing ring connected to the second card and surrounding the second central shaft;

[0012] The second impeller and the second card are connected as a whole.

[0013] Further: The second coupling includes: a bushing connected to the second central shaft, with one end inserted and positioned with the second impeller; and a first protrusion connected to the outer wall of the other end of the bushing and abutting against the second impeller.

[0014] Further: The second impeller includes: a hub having a stepped positioning groove at the middle position for accommodating the second coupling, one end being inserted and positioned with the shaft sleeve, and the hub further having an inner groove surrounding the other end of the stepped positioning groove and spaced from the stepped positioning groove; and a plurality of blades uniformly distributed on the outer wall of the hub and arranged opposite to the inner groove.

[0015] Further: The second damping rubber is in an arc structure, clamped at the stepped positioning groove and lined between the second coupling and the second impeller.

[0016] Further: The outer shape of the second card is a stepped structure, having a stepped through hole at the middle position, a stop and a second protrusion on one side, and a third protrusion is also provided at the stepped through hole;

[0017] The second card seal ring is arranged at the stepped through hole;

[0018] The stop is used for clamping with the stepped positioning groove;

[0019] The second protrusion is arranged between the large outer circle of the second card and the stop and is used for inserting into the inner groove;

[0020] The third protrusion is used for blocking the second card seal ring.

[0021] Further: The partial longitudinal section of the second protrusion is an "L" - shaped structure or a square structure, and after being projected in a plane from right to left, it is an annular structure;

[0022] The partial longitudinal section of the inner groove is a "T" - shaped structure, and after being projected in a plane from left to right, it is an annular structure.

[0023] Further: The materials of the second impeller and the second card are plastics;

[0024] The inner groove and the second protrusion are welded by ultrasonic welding. After welding, the second protrusion fills the inner groove.

[0025] Further: One side of the second card also has a chamfer.

[0026] Further: The second card seal ring is an O - ring.

[0027] Further: It further includes: a gasket sleeved on the second central shaft and arranged between the second magnetic ring assembly and the second bearing.

[0028] Adopting the above technical solution, it has the following beneficial effects: A washing machine drain pump rotor, compared with the related art, is provided with a second magnetic ring assembly, a second bearing and an impeller structure; The impeller structure includes: a second coupling, a second impeller, a second shock-absorbing rubber, a second card and a second card sealing ring; The second impeller and the second card are connected as a whole, and the structural reliability is relatively good, and the second card will not crack and damage, reducing the probability of pulling off between the second card and the second impeller, and reducing the noise; Thus, it overcomes the technical problems of poor structural reliability between the card and the impeller, the card cracking and damage, the pulling off between the card and the impeller, and the large noise, achieving the technical effect that the structural reliability between the card and the impeller is relatively good, the card will not crack and damage, reducing the probability of pulling off between the card and the impeller, and reducing the noise, and has practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is the overall assembly explosion diagram;

[0030] Figure 2 is Figure 1 the partial cross-sectional view after combination;

[0031] Figure 3 is the partial cross-sectional view of the second card and the second card sealing ring;

[0032] Figure 4 is the partial cross-sectional view of the impeller structure;

[0033] Figure 5 is Figure 4 the partial enlarged schematic view of part A in

[0034] Figure 6 is the partial cross-sectional view of the second coupling, the second impeller, the second shock-absorbing rubber and the second card after combination;

[0035] Figure 7 is Figure 6 the partial enlarged schematic view of part B in

[0036] Figure 8 is the overall assembly explosion diagram of the drain pump rotor in the prior art;

[0037] Figure 9 is Figure 8 the partial cross-sectional view after combination;

[0038] Figure 10 is the partial cross-sectional view of the first impeller in the prior art;

[0039] Figure 11Partial cross-sectional view of the combination of the first impeller and the first card in the prior art;

[0040] In the figure: 10. Second magnetic ring assembly, 11. Second central shaft, 20. Second bearing, 30. Second coupling, 31. Sleeve, 32. First protrusion, 40. Second impeller, 41. Hub, 41-1. Stepped positioning groove, 41-2. Inner groove, 42. Blade, 50. Second shock-absorbing rubber, 60. Second card, 61. Stepped through-hole, 62. Stopper, 63. Second protrusion, 64. Third protrusion, 65. Bevel angle, 70. Second card sealing ring, 80. Gasket, 100. First magnetic ring assembly, 101. First central shaft, 200. First bearing, 300. First card sealing ring, 400. First card, 500. First coupling, 600. Coupling sealing ring, 700. First shock-absorbing rubber, 800. First impeller, 801. Step surface, 802. Rib. Specific embodiments

[0041] In order to make the content easier to be clearly understood, the following will be further described in detail according to specific embodiments in conjunction with the accompanying drawings;

[0042] A washing machine drain pump rotor solves the technical problems in the related art that the structural reliability between the card and the impeller is poor, there may be cracking and damage of the card, the card and the impeller are pulled off, and the noise is large. It can be manufactured and used, achieving relatively good structural reliability between the card and the impeller, no cracking and damage of the card, reducing the probability of the card and the impeller being pulled off, and reducing the noise. The general idea is as follows:

[0043] One embodiment:

[0044] As Figure 1 、 Figure 2 shown; a washing machine drain pump rotor includes: a second magnetic ring assembly 10; and a second bearing 20 connected to a second central shaft 11 of the second magnetic ring assembly 10; characterized in that it further includes: an impeller structure connected to the second central shaft 11 and having one end in contact with the side wall of the second bearing 20;

[0045] The impeller structure includes: a second coupling 30, connected to the second central shaft 11 and spaced from the second bearing 20; a second impeller 40, sleeved on the second coupling 30 at the middle position, surrounding the second coupling 30, one end connected to the second coupling 30, and the other end extending towards the second bearing 20 and spaced from the second bearing 20; a second shock-absorbing rubber 50, connected between the second coupling 30 and the second impeller 40; a second card 60, surrounding the second central shaft 11, disposed between the second bearing 20 and the second impeller 40, and contacting one side wall of the second bearing 20; and a second card seal ring 70, connected to the second card 60 and surrounding the second central shaft 11.

[0046] The second impeller 40 and the second card 60 are connected as a whole.

[0047] Specifically, during implementation, a second magnetic ring assembly 10, a second bearing 20, and an impeller structure are provided; the impeller structure includes: a second coupling 30, a second impeller 40, a second shock-absorbing rubber 50, a second card 60, and a second card seal ring 70; the second impeller 40 and the second card 60 are connected as a whole, with relatively good structural reliability, the second card 60 will not crack or be damaged, reducing the probability of pulling apart between the second card 60 and the second impeller 40 and reducing noise.

[0048] Another implementation manner:

[0049] As Figure 1 、 Figure 2 shown; during implementation, the second magnetic ring assembly 10, the second central shaft 11, and the second bearing 20 are common structures in the prior art, not the inventive points of the present invention. They are only for better describing the present invention and facilitating understanding of the technical solution of the present invention. Those of ordinary skill in the art can directly and unambiguously know how to set them after seeing the disclosed content, without the need to pay creative labor or conduct excessive experiments.

[0050] Another implementation manner:

[0051] As Figure 1 、 Figure 2 、 Figure 4 、 Figure 6 shown; during implementation, the second coupling 30 includes: a shaft sleeve 31, connected to the second central shaft 11, and one end is inserted and positioned with the second impeller 40; and a first protrusion 32, connected to the outer wall of the other end of the shaft sleeve 31 and abutted against the second impeller 40.

[0052] The shaft sleeve 31 is integrally formed with the first protrusion 32; the shaft sleeve 31 is tightly fitted with the second central shaft 11 and is inserted and positioned with the second impeller 40. The first protrusion 32 abuts against the second impeller 40, which has a limiting effect, making the installation and positioning of the second impeller 40 and the second coupling 30 relatively convenient;

[0053] Another embodiment:

[0054] As Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 shown; in implementation, the second impeller 40 includes: a hub 41, which has a stepped positioning groove 41-1 at the middle position. The stepped positioning groove 41-1 is used to accommodate the second coupling 30, and one end is inserted and positioned with the shaft sleeve 31. The hub 41 also has an inner groove 41-2, which surrounds the other end of the stepped positioning groove 41-1 and is spaced from the stepped positioning groove 41-1; and four blades 42, which are evenly distributed on the outer wall of the hub 41 and are arranged opposite to the inner groove 41-2;

[0055] The material of the second impeller 40 is plastic, and the hub 41 and the blades 42 are integrally injection-molded;

[0056] The stepped positioning groove 41-1 is provided, which is beneficial to accommodating the second coupling 30 and is beneficial to connecting and positioning with the shaft sleeve 31 and the second card 60;

[0057] The inner groove 41-2 is provided to cooperate with the second protrusion 63 on the second card 60, which is beneficial to adopting the ultrasonic welding method to make the second impeller 40 and the second card 60 form a whole;

[0058] Another embodiment:

[0059] As Figure 1 、 Figure 2 、 Figure 4 、 Figure 6 shown; in implementation, the second shock-absorbing rubber 50 is in an arc structure, is stuck at the stepped positioning groove 41-1, and is lined between the second coupling 30 and the second impeller 40, making the connection between the second coupling 30 and the second impeller 40 more reliable, not loose, and ensuring the rotational synchronism of the second coupling 30 and the second impeller 40;

[0060] Another embodiment:

[0061] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、Figure 5 , Figure 6 , Figure 7 As shown in Figure 7 . During implementation, the outer shape of the second card 60 is a stepped structure, with a stepped through-hole 61 in the middle position, a rabbet 62 and a second protrusion 63 on one side, and a third protrusion 64 is also provided at the stepped through-hole 61;

[0062] A second card sealing ring 70 is provided at the stepped through-hole 61, and the third protrusion 64 is used to block the second card sealing ring 70, so that the second card sealing ring 70 can be reliably positioned;

[0063] The rabbet 62 is used to be clamped with the stepped positioning groove 41-1, and the assembly and positioning are relatively convenient;

[0064] The second protrusion 63 is arranged between the large outer circle of the second card 60 and the rabbet 62 and is used to be inserted into the inner groove 41-2, which is beneficial to adopt the ultrasonic welding method to form the second impeller 40 and the second card 60 into a whole;

[0065] The materials of the second card 60 and the second impeller 40 are both plastics; the partial longitudinal section of the second protrusion 63 is an "L" - shaped structure or a square structure, and after the planar projection from right to left, it is an annular structure (as shown in Figure 3 , Figure 4 ); the partial longitudinal section of the inner groove 41-2 is a "T" - shaped structure, and after the planar projection from left to right, it is an annular structure (as shown in Figure 4 ); ultrasonic welding is adopted between the inner groove 41-2 and the second protrusion 63 (during ultrasonic welding, local high temperature will be generated at the mating part of the second protrusion 63 and the inner groove 41-2, causing the mating part to melt. After applying pressure to the second impeller 40 and the second card 60, the second protrusion 63 fills the inner groove 41-2, achieving the purpose of ultrasonic welding, and also ensuring the structural strength). After cooling and solidifying, the second impeller 40 and the second card 60 are connected into a whole, with relatively good structural reliability, the second card 60 will not crack and be damaged, reducing the probability of pulling - off between the second impeller 40 and the second card 60 and reducing the noise;

[0066] One side of the second card 60 also has an oblique angle 65, which is beneficial to the second card 60 being clamped into the stepped positioning groove 41-1, and the assembly is relatively convenient;

[0067] Another implementation method:

[0068] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 Figure 1 , Figure 2 , Figure 3 , Figure 4 ​​​​​​As shown; during implementation, the second card sealing ring 70 is an O-ring, which ensures the sealing performance, prevents the grease in the second impeller 40 from leaking due to poor sealing, and has the effect of reducing noise;

[0069] Another implementation manner:

[0070] Such as Figure 1 、 Figure 2 、 Figure 4 As shown; during implementation, after the second coupling 30, the second impeller 40, the second shock-absorbing rubber 50, the second card 60 and the second card sealing ring 70 are combined, an impeller structure is formed, and then the impeller structure is assembled to the second central shaft 11 by a crimping method, and the structural reliability is relatively good and the assembly is relatively convenient;

[0071] Another implementation manner:

[0072] Such as Figure 1 、 Figure 2 As shown; during implementation, it further includes: a gasket 80, sleeved on the second central shaft 11 and arranged between the second magnetic ring assembly 10 and the second bearing 20; the gasket 80 is a circular sheet structure, which is beneficial to connecting the second bearing 20 to the second central shaft 11, has relatively good structural reliability, and can also adjust the position of the second bearing 20, and has relatively good flexibility in use;

[0073] The structure in the prior art:

[0074] See Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 ; As described in the background art, the first magnetic ring assembly 100, the first bearing 200, the first card sealing ring 300, the first card 400, the first coupling 500, the coupling sealing ring 600, the first shock-absorbing rubber 700 and the first impeller 800 are common structures in the prior art, which are not the inventive points of the present invention. They are only for better describing the present invention and facilitating the understanding of the technical solution of the present invention. Those of ordinary skill in the art can directly and unambiguously know how to set them after seeing the disclosed content, without the need to pay creative labor or conduct excessive experiments;

[0075] In the description, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or position relationship are based on the position relationship shown in the drawings, and are only for the convenience of description or simplifying the description, rather than indicating a specific orientation that must be had; the operation process described in the embodiment is not an absolute usage step, and corresponding adjustments can be made during actual use;

[0076] Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art; the terms "first", "second" and similar words used in the specification and claims do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "a" or "an" do not determine a quantity limitation, but indicate the existence of at least one, which needs to be determined according to the content of the embodiments;

[0077] As described above, only the preferred specific embodiments are provided, but the scope of protection is not limited thereto. Any person skilled in the art within the disclosed technical scope, according to the technical solutions and inventive concepts thereof, makes equivalent substitutions or changes, and should be covered within the scope of protection thereof.

Claims

1. A washing machine drain pump rotor, comprising: A second magnetic ring assembly (10); and a second bearing (20), connected to a second central axis (11) on the second magnetic ring assembly (10); characterized in that it also includes: an impeller structure, connected to the second central axis (11), one end of which is in contact with a side wall of the second bearing (20); The impeller structure comprises: a second coupling (30), connected to the second central axis (11), and spaced from the second bearing (20); a second impeller (40), sleeved on the second coupling (30) at a middle position, surrounding the second coupling (30), one end of which is connected to the second coupling (30), and the other end of which extends toward the second bearing (20), and spaced from the second bearing (20); a second shock-absorbing rubber (50), connected between the second coupling (30) and the second impeller (40); a second card (60), surrounding the second central axis (11), and disposed between the second bearing (20) and the second impeller (40), and contacting a side wall of the second bearing (20); and a second card seal ring (70), connected to the second card (60), and surrounding the second central axis (11); The second impeller (40) and the second card (60) are connected as a whole.

2. A washing machine drain pump rotor according to claim 1, characterized in that: The second coupling (30) comprises: a sleeve (31) connected to the second central shaft (11), one end of which is plugged into and positioned with the second impeller (40); and a first protrusion (32) connected to the outer wall of the other end of the sleeve (31) and abutting against the second impeller (40).

3. A washing machine drain pump rotor according to claim 2, characterized in that: The second impeller (40) comprises: a hub (41), a stepped positioning groove (41-1) at a middle position, the stepped positioning groove (41-1) being used to accommodate the second coupling (30), one end of which is plugged and positioned with the shaft sleeve (31), and the hub (41) also has an inner groove (41-2), the inner groove (41-2) surrounds the other end of the stepped positioning groove (41-1) and is arranged at intervals from the stepped positioning groove (41-1); and a plurality of blades (42) evenly distributed on the outer wall of the hub (41) and arranged opposite to the inner groove (41-2).

4. A washing machine drain pump rotor according to claim 3, characterized in that: The second shock-absorbing rubber (50) is an arc-shaped structure, is stuck in the stepped positioning groove (41-1), and is lined between the second coupling (30) and the second impeller (40).

5. A washing machine drain pump rotor according to claim 3, characterized in that: The second card (60) has a stepped structure, with a stepped through hole (61) in the middle, a stopper (62) and a second protrusion (63) on one side, and a third protrusion (64) is also provided at the stepped through hole (61); The second card sealing ring (70) is arranged at the stepped through hole (61); The stopper (62) is used for engaging with the stepped positioning groove (41-1); The second protrusion (63) is arranged between the large outer circle of the second card (60) and the stopper (62) and is used for being inserted into the inner groove (41-2); The third protrusion (64) is used to block the second card sealing ring (70).

6. A washing machine drain pump rotor according to claim 5, characterized in that: The local longitudinal section of the second protrusion (63) is an "L"-shaped structure or a square structure, and after being projected from right to left, it is a circular ring structure; The local longitudinal section of the inner groove (41-2) is a "T"-shaped structure, and after plane projection from left to right, it is a circular ring structure.

7. A washing machine drain pump rotor according to claim 6, characterized in that: The second impeller (40) and the second card (60) are made of plastic; Ultrasonic welding is used between the inner groove (41-2) and the second protrusion (63); after welding, the second protrusion (63) fills the inner groove (41-2).

8. A washing machine drain pump rotor according to claim 5, characterized in that: The second card (60) also has a bevel (65) on one side.

9. A washing machine drain pump rotor according to claim 1 or 5, characterized in that: The second card sealing ring (70) is an O-ring.

10. A washing machine drain pump rotor according to claim 1 or 4 or 5 or 7 or 8, characterized in that: Also includes: A gasket (80) is sleeved on the second central shaft (11) and is arranged between the second magnetic ring assembly (10) and the second bearing (20).

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