Sewage pump and household appliance

Abstract

The utility model discloses a sewage pump and a household appliance, the sewage pump comprises a sewage pump main body, a motor and a sealing assembly, the sewage pump main body comprises a pump shell and an impeller, and the impeller is rotatably mounted in the pump shell; the motor comprises a machine body and a motor shaft, the machine body is arranged on the outer side of the pump shell and connected with the pump shell, part of the motor shaft extends into the pump shell and is in transmission connection with the impeller, and the machine body, the motor shaft and the pump shell jointly define a cavity; the sealing assembly is arranged in the cavity, abuts against the machine body, the pump shell and the motor shaft in a sealed mode and comprises a plurality of first sealing pieces, and the first sealing pieces are sequentially arranged in a stacked mode in the axial direction of the motor shaft and deform under pressure at the same time. The sealing assembly seals the assembly between the pump shell and the machine body, the structure is simple, and the effect of reducing the cost is achieved; the multiple first sealing pieces can be used for assembling and sealing between the pump shell and the machine body, so that the multiple insurance effect can be achieved, and the assembling sealing performance between the pump shell and the machine body is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field related to sewage discharge, and in particular to a sewage pump and household appliances. Background Art

[0002] Sewage pumps are used in household appliances such as washing machines and floor scrubbers. They include a pump casing, an impeller, and a motor. The impeller is located inside the pump casing and is connected to the motor shaft of the motor. When the sewage pump is working, the motor shaft drives the movement of the impeller inside the pump casing to draw the medium into the water inlet of the pump casing and discharge it out of the water outlet, thereby achieving the purpose of discharging the medium from household appliances.

[0003] Currently, existing sewage pumps usually have bearings mounted on the motor shaft and seals installed between the bearings and the pump housing to achieve a seal between the pump housing and the motor shaft. However, the presence of the bearings makes the sealing structure between the pump housing and the motor shaft complex and expensive. Utility Model Content

[0004] In view of this, it is necessary to provide a sewage pump and a household appliance that can solve the above technical problems.

[0005] To solve the above technical problems, this application provides the following technical solutions:

[0006] A sewage pump, comprising:

[0007] The sewage pump body comprises a pump casing and an impeller, wherein the impeller is rotatably mounted in the pump casing;

[0008] The motor comprises a body and a motor shaft, wherein the body is arranged outside the pump housing and connected to the pump housing, the motor shaft partially extends into the pump housing and is drivingly connected to the impeller, and a cavity is enclosed by the body, the motor shaft and the pump housing;

[0009] A sealing assembly is arranged in the cavity and respectively abuts and seals the machine body, the pump housing and the motor shaft. The sealing assembly includes a plurality of first sealing members, which are stacked in sequence along the axial direction of the motor shaft and deformed under pressure at the same time.

[0010] It can be understood that the compression deformation of the multiple first seals stacked on the motor shaft can realize that the sealing assembly can respectively abut against the machine body, pump casing and motor shaft, so as to realize the assembly seal between the pump casing and the machine body by the sealing assembly and play the role of eliminating bearings, which can simplify the structure and reduce costs; at the same time, the multiple first seals can be used for the assembly seal between the pump casing and the machine body respectively, which can play a multiple insurance role to ensure the sealing of the assembly between the pump casing and the machine body.

[0011] In one embodiment, the first sealing member includes a main body and an extending protrusion, wherein the extending protrusion is arranged on the inner side of the main body and connected to the main body as a whole;

[0012] The main body is arranged between the pump housing and the machine body; the extending protrusion is bent relative to the main body and abuts against the motor shaft.

[0013] It can be understood that since the extended protrusion is bent relative to the main body and rests on the motor shaft, the extended protrusion can automatically compensate for the part worn due to direct contact with the motor shaft. In this way, the service life of the first seal can be extended and the sealing of the assembly between the pump casing and the body can be further ensured.

[0014] In one embodiment, a lubricating layer is provided on the extending protrusion, and the extending protrusion can be pressed against the motor shaft through the lubricating layer.

[0015] It can be understood that a lubricating layer is provided on the extended protrusion so that when the extended protrusion abuts against the motor shaft, the lubricating layer can lubricate the extended protrusion and the motor shaft. In this way, the friction force when the motor shaft contacts the extended protrusion during rotation can be reduced, which has the effect of extending the service life of the first seal.

[0016] In one embodiment, protrusions are arranged on the outer peripheral wall of the main body at intervals.

[0017] It can be understood that by providing protrusions at intervals on the outer peripheral wall of the main body, the main body can be sealed against the pump casing and the body through the protrusions deformed by pressure, thereby further improving the sealing performance of the first seal.

[0018] In one embodiment, the motor is configured as a brushed motor.

[0019] It can be understood that by configuring the motor as a brushed motor and utilizing the low cost of the brushed motor, the overall production cost of the sewage pump can be reduced.

[0020] In one embodiment, the sewage pump further includes a connecting piece, which passes through the pump casing and is threadedly connected to the pump body.

[0021] It is understandable that the connecting piece passes through the pump casing and is connected to the machine body in a threaded manner, which facilitates the assembly of the pump casing on the machine body.

[0022] In one embodiment, the sewage pump further includes a second sealing member, which is disposed between the connecting member and the pump casing and deformed under pressure, and is used for assembling and sealing the connecting member and the pump casing.

[0023] It is understandable that the second sealing member is used to assemble and seal the connecting member and the pump housing, thereby preventing leakage of the medium in the pump housing due to the structural arrangement of the connecting member.

[0024] In one embodiment, a medium channel is formed between the impeller and the inner peripheral wall of the pump housing, and the medium channel can be passed through;

[0025] The channel diameter of the medium channel is set to L, where L≥8mm.

[0026] It can be understood that, through the above-mentioned structural arrangement, the medium channel formed between the impeller and the inner peripheral wall of the pump casing can allow particles with an outer diameter of 8 mm in the medium to pass through, thereby ensuring the working flow of the sewage pump.

[0027] In one embodiment, the impeller includes a plurality of main blades, which are arranged in sequence and spaced apart along the circumferential direction of the motor shaft; wherein the height of each main blade gradually decreases in a direction away from the motor shaft.

[0028] It can be understood that by arranging a structure in which the height of the main blade gradually decreases in the direction away from the motor shaft, it is possible to effectively prevent hair and fiber impurities contained in the medium from being entangled on the main blade, and further improve the working flow of the sewage pump.

[0029] This application also seeks protection for a household appliance comprising the sewage pump described above.

[0030] Due to the application of the above solution, this application has the following advantages compared to the prior art:

[0031] The sewage pump and household appliances for which protection is sought in this application utilize the compression deformation of multiple first seals stacked on the motor shaft to enable the sealing assembly to respectively abut against the machine body, pump casing and motor shaft, thereby achieving the assembly seal between the pump casing and the machine body by the sealing assembly and eliminating the need for bearings, which can simplify the structure and reduce costs; at the same time, multiple first seals can be used respectively for the assembly seal between the pump casing and the machine body, which can serve as multiple insurances to ensure the sealing of the assembly between the pump casing and the machine body. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 A schematic structural diagram of a sewage pump provided in one embodiment of the present application;

[0034] Figure 2 A cross-sectional view of a sewage pump provided in one embodiment of the present application;

[0035] Figure 3 for Figure 2 Enlarged view of part A in the middle;

[0036] Figure 4 A schematic structural diagram of a first sealing member provided in one embodiment of the present application;

[0037] Figure 5 A schematic structural diagram of an impeller provided in one embodiment of the present application;

[0038] Figure 6 A cross-sectional view from another perspective of a sewage pump provided by an embodiment of the present application.

[0039] Figure numerals: 100, sewage pump; 10, sewage pump body; 11, pump casing; 101, cavity; 111, upper cover; 1111, liquid inlet channel; 1112, liquid outlet channel; 1101, pump chamber; 112, lower cover; 1121, ring groove; 113, third sealing member; 12, impeller; 102, medium channel; 121, main blade; 122, through hole; 123, auxiliary blade; 20, motor; 21, machine body; 22, motor shaft; 30, sealing assembly; 31, first sealing member; 311, main body; 3111, protrusion; 312, extended protrusion; 40, connecting member; 50, second sealing member. DETAILED DESCRIPTION

[0040] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0041] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0043] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0044] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the relevant listed items.

[0045] The sewage pump 100 for which protection is sought in this application is used in household appliances such as washing machines and floor scrubbers (not shown).

[0046] like Figures 1 to 6 As shown, a sewage pump 100 provided in an embodiment of the present application includes a sewage pump body 10, a motor 20 and a sealing assembly 30. The sewage pump body 10 includes a pump casing 11 and an impeller 12, and the impeller 12 is rotatably installed in the pump casing 11; the motor 20 includes a body 21 and a motor shaft 22, the body 21 is arranged on the outside of the pump casing 11 and is connected to the pump casing 11, the motor shaft 22 partially extends into the pump casing 11 and is transmission-connected to the impeller 12, and a cavity is formed between the body 21, the motor shaft 22 and the pump casing 11; the sealing assembly 30 is arranged in the cavity 101 and is respectively abutted and sealed with the body 21, the pump casing 11 and the motor shaft 22, and the sealing assembly 30 includes a plurality of first sealing members 31, which are stacked in sequence along the axial direction of the motor shaft 22 and are simultaneously compressed and deformed.

[0047] It can be understood that the multiple first seals 31 stacked on the motor shaft 22 are compressed and deformed to achieve the sealing assembly 30 being able to abut against the machine body 21, the pump casing 11 and the motor shaft 22 respectively, so as to achieve the assembly seal between the pump casing 11 and the machine body 21 by the sealing assembly 30, and play the role of eliminating bearings, which can simplify the structure and reduce costs; at the same time, the multiple first seals 31 can be used for the assembly seal between the pump casing 11 and the machine body 21 respectively, which can play a multiple insurance role to ensure the sealing of the assembly between the pump casing 11 and the machine body 21.

[0048] In this embodiment, the number of the first sealing members 31 is two. Of course, for those skilled in the art, the number of the first sealing members 31 is not limited to two. The number of the first sealing members 31 can also be three, four, etc. The specific number can be set according to actual usage requirements, which will not be elaborated here.

[0049] like Figure 2 As shown, in one embodiment, the pump housing 11 includes an upper cover 111 and a lower cover 112. The upper cover 111 is formed with a liquid inlet channel 1111 and a liquid outlet channel 1112. The upper cover 111 and the lower cover 112 are connected and enclose a pump chamber 1101. The liquid inlet channel 1111 and the liquid outlet channel 1112 are connected through the pump chamber 1101. The impeller 12 is disposed in the area where the pump chamber 1101 is located. The impeller 12 in the pump chamber 1101 is driven to rotate by the motor shaft 22, drawing the medium into the liquid inlet channel 1111 and discharging it from the liquid outlet channel 1112. Here, the medium is water and impurities contained in the water (large particles, small particles, hair, fibers, etc.). In this embodiment, the body 21 is disposed on the outside of the lower cover 112 and is connected to the lower cover 112.

[0050] In one embodiment, the upper cover 111 and the lower cover 112 may be connected and fixed by bolts, screws or other connecting members (not shown).

[0051] like Figure 2 As shown, in one embodiment, the pump housing 11 further includes a third sealing member 113, which is disposed between the upper cover 111 and the lower cover 112 and deformed under pressure, and is used to assemble and seal the upper cover 111 and the lower cover 112. In this embodiment, an annular groove 1121 is provided on the lower cover 112, and the third sealing member 113 is disposed in the annular groove 1121 and abuts and seals against the upper cover 111 and the lower cover 112, respectively. This arrangement can prevent the deformation of the upper cover 111 or the lower cover 112 from affecting the assembly seal between the upper cover 111 and the lower cover 112, thereby ensuring the sealing performance of the assembly between the upper cover 111 and the lower cover 112. Here, the third sealing member 113 can be integrally injection-molded from a rubber material.

[0052] like Figure 2As shown, in one embodiment, a medium channel 102 is formed between the impeller 12 and the inner circumferential wall of the pump housing 11. The medium channel 102 allows the medium to flow. The channel diameter of the medium channel 102 is set to L, where L ≥ 8 mm. This configuration allows the medium channel 102 formed between the impeller 12 and the inner circumferential wall of the pump housing 11 to allow large particles in the medium to pass through. Large particles specifically refer to impurities with an outer diameter of 8 mm or less. This ensures the operating flow rate of the sewage pump 100.

[0053] like Figure 6 As shown, in one embodiment, the diameter of the liquid outlet channel 1112 is set to K, and the length of the impeller 12 covering the liquid outlet channel 1112 is set to N, where the range of N / K is set to 63%-67%. This configuration allows the sewage pump 100 to smoothly discharge large particles in the medium while ensuring the operating flow rate. Here, the impeller 12 rotates counterclockwise, that is, the impeller 12 rotates toward the liquid outlet channel 1112 during operation. This allows the sewage pump 100 to smoothly discharge the medium while ensuring operating efficiency.

[0054] like Figure 5 As shown, in one embodiment, the impeller 12 includes a plurality of main blades 121, which are spaced apart along the circumference of the motor shaft 22. The height of each main blade 121 gradually decreases as it moves away from the motor shaft 22. This arrangement prevents hair and fibers in the medium from becoming entangled in the impeller 12, while allowing large particles in the medium to pass through smoothly. Here, the impeller 12 can be integrally injection-molded from polypropylene.

[0055] like Figure 5 As shown, in one embodiment, the impeller 12 further defines a plurality of through holes 122, which are sequentially spaced apart along the circumferential direction of the motor shaft 22. It will be appreciated that the plurality of through holes 122 defined in the impeller 12 allows the sewage pump 100 to generate turbulent flow during operation, thereby preventing impurities from adhering to the impeller 12 and, at the same time, allowing small particles beneath the impeller 12 to be discharged through the through holes 122.

[0056] like Figure 5 As shown, in one embodiment, the impeller 12 includes a plurality of auxiliary blades 123, which are sequentially spaced apart along the circumferential direction of the motor shaft 22. It will be appreciated that by providing the plurality of auxiliary blades 123 on the impeller 12, the auxiliary blades 123 can prevent large particles from entering between the impeller 12 and the lower cover 112 during operation of the sewage pump 100, while also clearing large particles already between the impeller 12 and the lower cover 112, thereby preventing the impeller 12 from becoming stuck.

[0057] In one embodiment, the motor 20 is configured as a brushed motor. That is, by configuring the motor 20 as a brushed motor, the overall production cost of the sewage pump 100 can be reduced by utilizing the low cost of brushed motors.

[0058] like Figure 3 、 Figure 4 As shown, in one embodiment, the first sealing member 31 includes a main body portion 311 and an extension protrusion 312, wherein the extension protrusion 312 is arranged on the inner side of the main body portion 311 and is connected to the main body portion 311 as a whole; wherein the main body portion 311 is arranged between the pump housing 11 and the machine body 21; the extension protrusion is bent relative to the main body portion 311 and abuts against the motor shaft 22. In other words, since the extension protrusion 312 is bent relative to the main body portion 311 and abuts against the motor shaft 22, the extension protrusion 312 can automatically compensate for the part worn due to direct contact with the motor shaft 22. In this way, the service life of the first sealing member 31 can be extended, and the sealing performance of the assembly between the pump housing 11 and the machine body 21 can be further ensured. Here, the first sealing member 31 can be integrally injection molded from a rubber material.

[0059] like Figure 3 、 Figure 4 As shown, in one embodiment, a lubricating layer (not shown) is provided on the extension protrusion 312, and the extension protrusion 312 can abut against the motor shaft 22 through the lubricating layer. It will be understood that the lubricating layer provided on the extension protrusion 312 can lubricate the extension protrusion 312 and the motor shaft 22 when the extension protrusion 312 abuts against the motor shaft 22. This can reduce the friction when the motor shaft 22 contacts the extension protrusion 312 during rotation, thereby extending the service life of the first seal 31. Here, the lubricating layer can be a hydrophobic grease.

[0060] like Figure 3 、 Figure 4 As shown, in one embodiment, protrusions 3111 are sequentially provided at intervals on the outer peripheral wall of the main body 311. In other words, by sequentially providing the protrusions 3111 at intervals on the outer peripheral wall of the main body 311, the main body 311 can be pressed and deformed by the protrusions 3111 to abut and seal against the pump housing 11 and the body 21, thereby further improving the sealing performance of the first sealing member 31.

[0061] like Figure 2 As shown, in one embodiment, the sewage pump 100 further includes a connector 40, which passes through the pump housing 11 and is threadedly connected to the body 21. In other words, the connector 40 passes through the pump housing 11 and is threadedly connected to the body 21, thereby facilitating the assembly of the pump housing 11 on the body 21. Here, the connector 40 can be configured as a bolt, a screw, etc.

[0062] like Figure 2 As shown, in one embodiment, the sewage pump 100 further includes a second sealing member 50. The second sealing member 50 is disposed between the connector 40 and the pump housing 11 and deforms under pressure to seal the connector 40 and the pump housing 11. In other words, the second sealing member 50 seals the connector 40 and the pump housing 11, thereby preventing leakage of the medium within the pump housing 11 due to the structural arrangement of the connector 40. Here, the third sealing member 113 can be integrally injection-molded from a rubber material.

[0063] The present application also seeks protection for a household appliance comprising the sewage pump 100 described above.

[0064] In summary, the sewage pump 100 and household appliances for which protection is sought in this application utilize the compression deformation of multiple first seals 31 stacked on the motor shaft 22 to enable the sealing assembly 30 to respectively abut against the machine body 21, the pump casing 11 and the motor shaft 22, thereby achieving the assembly seal between the pump casing 11 and the machine body 21 by the sealing assembly 30, and playing the role of eliminating bearings, which can simplify the structure and reduce costs; at the same time, multiple first seals 31 can be used respectively for the assembly seal between the pump casing 11 and the machine body 21, which can play a multiple insurance role to ensure the sealing of the assembly between the pump casing 11 and the machine body 21.

[0065] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.

Claims

1. A sewage pump, characterized in that: The sewage pump (100) comprises: A sewage pump body (10) comprises a pump casing (11) and an impeller (12), wherein the impeller (12) is rotatably mounted in the pump casing (11); A motor (20) comprises a body (21) and a motor shaft (22), wherein the body (21) is arranged outside the pump housing (11) and connected to the pump housing (11), the motor shaft (22) partially extends into the pump housing (11) and is transmission-connected to the impeller (12), and a cavity (101) is formed by the body (21), the motor shaft (22) and the pump housing (11); A sealing assembly (30) is disposed in the cavity (101) and abuts and seals the machine body (21), the pump housing (11) and the motor shaft (22), respectively. The sealing assembly (30) includes a plurality of first sealing members (31), which are stacked in sequence along the axial direction of the motor shaft (22) and deformed under pressure at the same time.

2. The sewage pump according to claim 1, characterized in that The first sealing member (31) comprises a main body (311) and an extending convex portion (312), wherein the extending convex portion (312) is arranged on the inner side of the main body (311) and is integrally connected to the main body (311); The main body (311) is arranged between the pump housing (11) and the machine body (21); the extended protrusion (312) is bent relative to the main body (311) and abuts against the motor shaft (22).

3. The sewage pump according to claim 2, characterized in that: A lubricating layer is provided on the extending protrusion (312), and the extending protrusion (312) can abut against the motor shaft (22) through the lubricating layer.

4. The sewage pump according to claim 2, characterized in that Protrusions (3111) are sequentially and spaced apart on the outer peripheral wall of the main body (311).

5. The sewage pump according to claim 1, characterized in that The motor (20) is configured as a brushed motor.

6. The sewage pump according to claim 1, characterized in that The sewage pump (100) further comprises a connecting piece (40), wherein the connecting piece (40) passes through the pump casing (11) and is threadedly connected to the machine body (21).

7. The sewage pump according to claim 6, characterized in that The sewage pump (100) further comprises a second sealing member (50), which is arranged between the connecting member (40) and the pump housing (11) and deformed under pressure, and is used for assembling and sealing the connecting member (40) and the pump housing (11).

8. The sewage pump according to claim 1, characterized in that: A medium channel (102) is formed between the impeller (12) and the inner peripheral wall of the pump housing (11), and the medium channel (102) is capable of conducting a medium; The channel diameter of the medium channel (102) is set to L, wherein L≥8mm.

9. The sewage pump according to claim 1, characterized in that The impeller (12) comprises a plurality of main blades (121), and the plurality of main blades (121) are sequentially spaced apart along the circumferential direction of the motor shaft (22); wherein the height of each main blade (121) gradually decreases in a direction away from the motor shaft (22).

10. A household appliance, characterized in that: The sewage pump (100) comprises any one of claims 1 to 9.

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