Roller washing machine

Abstract

The drum washing machine is provided with an outer drum, an oil seal chamber is arranged on the bottom wall of the outer drum, and an oil seal is arranged in the oil seal chamber; a sealing lip is arranged on the periphery of the oil seal, and the sealing lip and the inner wall of the oil seal chamber are sealed in a matched mode. According to the oil seal installation structure, the sealing performance and stability of the whole oil seal system are guaranteed, and particularly when the joint of the plastic bottom wall of the outer cylinder and the metal bearing seat is not smooth and flashes occur, tight sealing between the oil seal and the outer cylinder can still be kept.

Description

Technical Field

[0001] This invention belongs to the field of washing machines, and more specifically, relates to a drum washing machine. Background Technology

[0002] Existing drum washing machines consist of an inner drum and an outer drum. The outer drum is typically made of plastic and holds water; the inner drum is made of stainless steel and has drainage holes to hold laundry. An inner drum shaft is fixed to the center of the rear of the inner drum. The other end of the inner drum shaft passes through the bottom of the outer drum and connects to the motor rotor. The inner drum shaft transmits rotational power, and the motor rotor drives the inner drum to rotate via the inner drum shaft. When the drum washing machine is running, the outer drum remains stationary, while the inner drum rotates under the motor's power. To ensure the inner drum rotates properly, the portion of the inner drum shaft located on the outer drum is supported by two bearings of different sizes. These bearings are press-fitted into bearing housings on the outer drum using tooling.

[0003] In practical applications, there are generally two main types of sealing schemes for bearing housings made of iron and oil seals: The first type uses both plastic and iron for the oil seal mounting area. Due to the positioning accuracy of the outer cylinder mold and the shrinkage of the plastic, burrs and unevenness may occur at the joint between the plastic and iron, affecting the fit with the outer ring of the oil seal and leading to poor sealing and leakage. The second type uses plastic entirely for the oil seal mounting area. In this case, the plastic mold requires an angle for demolding, resulting in a tapered opening. Furthermore, the relatively soft plastic can cause the oil seal to easily detach, leading to sealing failure.

[0004] Chinese patent application number 201610786902.1 discloses a washing machine, comprising: a body; an outer tub installed within the body; a main shaft disposed within the body and passing through the outer tub; a bushing fitted onto the main shaft; and an oil seal fitted onto the bushing, the outer ring of the oil seal being connected to the outer tub, the inner ring of the oil seal having a plurality of water-sealing portions spaced apart along the axial direction of the main shaft, the water-sealing portions abutting against the outer wall surface of the bushing, at least one of the water-sealing portions having a self-lubricating coating on its outer surface, and lubricating oil filling the space between the inner ring of the oil seal and the bushing. In this application, if the lubricating oil on the outer ring of the oil seal is completely consumed, a problem of incomplete sealing between the oil seal and the outer tub may occur.

[0005] In view of this, the present invention is proposed. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a drum washing machine, wherein a sealing lip is provided on the outer periphery of the oil seal and the sealing lip cooperates with the inner wall of the oil seal chamber to ensure a tight seal between the oil seal and the outer drum.

[0007] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0008] The present invention provides a drum washing machine, wherein the drum washing machine is provided with an outer drum, the bottom wall of the outer drum is provided with an oil seal chamber, and an oil seal is provided in the oil seal chamber.

[0009] Furthermore, the outer periphery of the oil seal is provided with a sealing lip, which cooperates with the inner wall of the oil seal to seal.

[0010] Advantageously, the oil seal, through the sealing lip set on the outer periphery, seals against the inner wall of the oil seal chamber, effectively preventing leakage of liquid or gas between the oil seal chamber and the external environment, thus ensuring the sealing performance and stability of the entire system.

[0011] Furthermore, the sealing lip is embedded within the peripheral wall of the oil seal.

[0012] Furthermore, the oil seal chamber has an inwardly opening groove on its peripheral wall, and the groove is arranged in a ring along the peripheral wall; the sealing lip is pressed and embedded into the groove;

[0013] Preferably, the groove extends radially outward from the oil seal chamber;

[0014] Preferably, the opening of the groove extends radially outward toward the bottom wall of the outer cylinder, offset from the oil seal.

[0015] Furthermore, the oil seal chamber includes: a first oil seal chamber and a second oil seal chamber, wherein the second oil seal chamber is coaxially arranged with the first oil seal chamber;

[0016] The oil seal comprises a first body and a second body connected sequentially along the axial direction;

[0017] The first and second bodies of the oil seal are respectively sealed and installed in the first and second oil seal chambers;

[0018] Preferably, the peripheral wall of the first oil seal chamber is provided with an inwardly opening groove, and the sealing lip is provided on the outer periphery of the first body, and the sealing lip cooperates with the groove to seal;

[0019] Preferably, the peripheral wall of the first oil seal chamber is made of a different material than the peripheral wall of the second oil seal chamber, and / or the radial dimensions of the first oil seal chamber and the second oil seal chamber are different.

[0020] Furthermore, the first oil seal chamber is a cavity formed by a portion of the shaft hole penetrating the bottom wall of the outer cylinder expanding radially outward in the axial direction;

[0021] Preferably, the first oil seal chamber is a cavity formed by radially expanding outward in the axial direction from one end of the shaft hole that penetrates the bottom wall of the outer cylinder near the inner side of the outer cylinder.

[0022] Furthermore, the second oil seal chamber is defined within the through hole of the bearing housing and is adjacent to the first oil seal chamber, and the bearing housing is located within the bottom wall of the outer cylinder;

[0023] The second body of the oil seal is squeezed and sealed with the second oil seal chamber.

[0024] Furthermore, the second body of the oil seal is provided with at least one annular rib on its outer periphery; the second body of the oil seal and the second oil seal chamber are sealed by compressing the annular rib.

[0025] Furthermore, the diameter of the first oil seal chamber is larger than the diameter of the second oil seal chamber.

[0026] Furthermore, the first body of the oil seal extends outward from the radial direction of the oil seal from the connection point with the second body of the oil seal, and its outer diameter gradually increases; the sealing lip is provided at the end of the first body of the oil seal.

[0027] Furthermore, the oil seal is a one-piece molded structure.

[0028] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0029] 1. The oil seal installation structure of the present invention can still ensure the seal between the oil seal and the outer cylinder when there is a lack of tightness or burrs at the connection between the plastic bottom wall of the outer cylinder and the bearing seat.

[0030] 2. The sealing lip on the outer periphery of the oil seal of the present invention is embedded in the peripheral wall of the oil seal chamber, which can achieve the initial positioning of the oil seal during installation. At the same time, when the oil seal is tightened, it can ensure that the oil seal will not deviate from the original installation position or deform under the action of external force, thus preventing the problem of poor sealing.

[0031] 3. The oil seal chamber of the present invention has an inwardly opening groove on its peripheral wall, which cooperates with the sealing lip of the oil seal to achieve a seal, effectively preventing liquid from entering the bearing seat through the gap between the oil seal and the outer cylinder, thus preventing damage to the bearing seat.

[0032] 4. The oil seal chamber of the present invention consists of a first oil seal chamber formed by the bottom wall of the outer cylinder and a second oil seal chamber defined within the bearing seat. The oil seal includes a first body and a second body, and a sealing lip is provided on the outer periphery of the first body. The first body and the second body are respectively sealed in the first oil seal chamber and the second oil seal chamber, which can achieve the sealing of the two oil seal chambers. At the same time, it can prevent the situation where the seal is not tight due to the presence of flash at the connection between the outer cylinder wall and the bearing seat.

[0033] 5. The second body of the oil seal of the present invention is provided with annular ribs on its outer periphery, and the seal between the oil seal and the second oil seal chamber is achieved by extruding the annular ribs. This can effectively prevent liquid or impurities from seeping into the gap between the oil seal and the second oil seal chamber, thereby ensuring the sealing and safety of the washing machine during operation.

[0034] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0035] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0036] Figure 1 This is a schematic diagram of the structure of the drum washing machine of the present invention;

[0037] Figure 2 This is a cross-sectional schematic diagram of the outer drum structure of the drum washing machine of the present invention;

[0038] Figure 3 yes Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0039] Figure 4 This is an enlarged schematic diagram of the assembly point of the inner and outer cylinders after assembly.

[0040] Figure 5 yes Figure 4 Enlarged view of point B in the middle;

[0041] Figure 6 This is a schematic diagram of the oil seal structure of the present invention.

[0042] In the diagram: 100, outer cylinder; 110, bottom wall of outer cylinder; 200, inner cylinder; 210, inner cylinder shaft; 300, housing; 400, motor; 500, bearing housing; 510, oil seal chamber; 511, first oil seal chamber; 512, second oil seal chamber; 520, front bearing chamber; 521, front bearing; 530, rear bearing chamber; 531, rear bearing; 600, oil seal; 610, first body; 611, sealing lip; 620, second body; 621, annular rib.

[0043] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0045] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0046] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0047] like Figures 1 to 6 As shown, the present invention provides a drum washing machine, the drum washing machine having an outer drum 100, an oil seal chamber 510 having an oil seal 600 having an oil seal 600 inside the bottom wall of the outer drum 100.

[0048] In this embodiment, the drum washing machine provided by the present invention has a robust and durable casing 300, which not only provides stable support for the drum washing machine but also ensures the overall stability and service life of the drum washing machine. An outer drum 100 for holding washing water is installed inside the casing 300; inside the outer drum 100, a rotatable inner drum 200 is coaxially installed, ensuring that the inner drum 200 and the outer drum 100 can rotate synchronously, thereby enabling clothes to receive all-round and even washing during the washing process, improving the washing effect.

[0049] Specifically, the bottom wall of the outer drum 100 of the drum washing machine is provided with an oil seal chamber 510. Pressing the oil seal 600 into the oil seal chamber 510 can effectively prevent the leakage of lubricating oil or washing water.

[0050] A motor 400 for providing driving force is provided on the rear side of the outer drum 100. The rear end of the inner drum shaft 210 passes through the rear part of the outer drum 100 and is connected to the rotor of the motor 400 to transmit the driving force of the motor 400 to the inner drum 200. The motor 400 drives the inner drum 200 to rotate through the inner drum shaft 210 to complete the washing process.

[0051] Furthermore, the outer periphery of the oil seal 600 is provided with a sealing lip 611, which cooperates with the inner wall of the oil seal chamber 510 to seal.

[0052] In this embodiment, the bottom wall of the outer drum 100 is provided with an oil seal chamber 510, and an oil seal 600 is placed inside the oil seal chamber 510. This ensures the stability of the drum washing machine during operation and the sealing between the inner drum shaft 210 and the outer drum 100. The outer periphery of the oil seal 600 is provided with a sealing lip 611. When the oil seal 600 is installed in the oil seal chamber 510, the sealing lip 611 cooperates with the inner wall of the oil seal chamber 510, so that the oil seal 600 and the oil seal chamber 510 are tightly fitted, ensuring the sealing between the oil seal 600 and the oil seal chamber 510, thereby improving the performance and safety of the drum washing machine.

[0053] Furthermore, the sealing lip 611 is embedded within the peripheral wall of the oil seal chamber 510.

[0054] Furthermore, the oil seal chamber 510 has an inwardly opening groove on its peripheral wall, and the groove is arranged in a ring along the peripheral wall; the sealing lip 611 is pressed and embedded into the groove.

[0055] In this embodiment, the peripheral wall of the oil seal chamber 510 is provided with an inwardly opening groove, which is arranged around the perimeter of the peripheral wall. The groove provides a guiding and fixing mechanism for the installation of the oil seal 600. The sealing lip 611 on the oil seal 600 is arranged around the circumference of the oil seal 600. During the installation of the oil seal 600, the sealing lip 611 is pressed and embedded into the groove, which ensures a tight fit and stable seal between the oil seal 600 and the oil seal chamber 510. At the same time, it ensures that when the oil seal 600 is tightened, the shaft seal 600 will not deviate from the installation position or deform due to external forces, resulting in a poor seal.

[0056] Furthermore, the opening of the groove extends outward from the radial direction of the oil seal 600; preferably, the opening of the groove extends outward from the radial direction of the oil seal 600 toward the outer side of the bottom wall 110 of the outer cylinder.

[0057] In this embodiment, to improve the installation efficiency and sealing performance of the oil seal 600, the groove on the side wall of the oil seal chamber 510 is designed to extend outwards from the radial direction, ensuring that the sealing lip 611 can smoothly slide into the groove during installation. As a preferred embodiment, the opening of the groove extends outwards from the radial direction of the oil seal 600 toward the outer side of the bottom wall 110 of the outer drum of the washing machine. This makes it easier for the sealing lip 611 of the oil seal 600 to achieve a tight fit when embedded in the groove, improving the ease of installation and enhancing the seal between the oil seal 600 and the oil seal chamber 510, thereby improving the overall integrity and safety of the washing machine.

[0058] Furthermore, the oil seal chamber 510 includes: a first oil seal chamber 511 and a second oil seal chamber 512, wherein the second oil seal chamber 512 is coaxially arranged with the first oil seal chamber 511;

[0059] The oil seal 600 includes a first body 610 and a second body 620 connected in sequence along the axial direction;

[0060] The first body 610 and the second body 620 of the oil seal 600 are respectively sealed and installed in the first oil seal chamber 511 and the second oil seal chamber 512.

[0061] In this embodiment, the oil seal chamber 510 includes a first oil seal chamber 511 and a second oil seal chamber 512, which are coaxially arranged. The first oil seal chamber 511 and the second oil seal chamber 512 cooperate to form an integral oil seal chamber 510 for mounting the oil seal 600. The oil seal 600 has a first body 610 and a second body 620 arranged sequentially along the axial direction. When the oil seal 600 is installed in the oil seal chamber 510, the first body 610 and the second body 620 of the oil seal 600 are sealed to the first oil seal chamber 511 and the second oil seal chamber 512, respectively.

[0062] As a preferred embodiment, the groove is disposed on the peripheral wall of the first oil seal chamber 511, and the sealing lip 611 is disposed on the outer periphery of the first body 610 of the oil seal 600. During installation, the sealing lip 611 is squeezed and embedded in the groove to achieve a seal between the first body 610 of the oil seal 600 and the first oil seal chamber 511.

[0063] As another preferred embodiment, the peripheral walls of the first oil seal chamber 511 and the second oil seal chamber 512 are made of different materials, and / or the radial dimensions of the first oil seal chamber 511 and the second oil seal chamber 512 are different.

[0064] Furthermore, the first oil seal chamber 511 is a cavity formed by radially expanding a portion of the shaft hole penetrating the bottom wall 110 of the outer cylinder;

[0065] Preferably, the first oil seal chamber 511 is a chamber formed by radially expanding outward in the axial direction at one end of the shaft hole penetrating the bottom wall 110 of the outer cylinder near the inner side of the outer cylinder 100.

[0066] In this embodiment, the first oil seal chamber 511 of the oil seal chamber 510 is a cavity formed by radially expanding outward from one end of the shaft hole penetrating the bottom wall 110 of the outer drum near the inner side of the outer drum 100. That is, the first oil seal chamber 511 is formed by the bottom wall of the outer drum 100 of the drum washing machine. When installing the oil seal 600, the sealing lip 611 of the oil seal 600 is embedded in the peripheral wall of the first oil seal chamber 511, achieving a tight fit between the oil seal 600 and the first oil seal chamber 511. Embedding the sealing lip 611 of the oil seal 600 into the peripheral wall of the first oil seal chamber 511 not only ensures effective isolation of lubricating oil or washing liquid, preventing leakage, but also improves the stability and reliability of the drum washing machine during high-speed operation.

[0067] Specifically, the groove on the side wall of the oil seal chamber 510 is located on the peripheral wall of the first oil seal chamber 511, and the sealing lip 611 of the oil seal 600 is embedded in the groove. When installing the oil seal 600, the oil seal 600 is placed flat into the oil seal chamber 510 and then pressed down. During the pressing process, the sealing lip 611 is embedded in the groove, achieving a sealing installation of the oil seal 600 in the oil seal chamber 510.

[0068] In this embodiment, the mating point between the outer cylinder bottom wall 110 and the bearing housing 500 has a stepped structure. Specifically, the outer cylinder bottom wall 110 extends outward from the first oil seal chamber 511 in a stepped structure, including a first step. The inner sidewall of the first step is the sidewall of the first oil seal chamber 511, which provides installation space for the oil seal 600 and ensures a tight fit between the oil seal 600 and the oil seal chamber 510. To improve sealing performance, a groove is provided on the inner sidewall of the first step and extends into the first step, providing a precise embedding position for the sealing lip 611 of the oil seal 600. When the oil seal 600 is installed, its sealing lip 611 can be embedded in the groove, ensuring a close fit between the oil seal 600 and the first oil seal chamber 511, thus improving sealing performance.

[0069] Specifically, to improve the sealing and stability of the drum washing machine, a stepped structure is provided at the mating point between the outer drum bottom wall 110 and the bearing seat 500. First, a first step is provided outward from the first oil seal chamber 511. The first step extends horizontally outward from the first oil seal chamber 511, and a second step is provided at the end. The second step extends obliquely towards the bearing seat 500 from the connection point with the first step, forming a sloping structure. At the same time, the mating point between the bearing seat 500 and the outer drum bottom wall 110 also adopts the same stepped structure, and its step direction completely matches the direction of the stepped structure provided on the outer drum bottom wall 110, ensuring a tight fit and stability between the two.

[0070] Furthermore, the second oil seal chamber 512 is defined within the through hole of the bearing seat 500 and is adjacent to the first oil seal chamber 511. The bearing seat 500 is located within the bottom wall of the outer cylinder 100.

[0071] The second body 620 of the oil seal 600 is squeezed and sealed with the second oil seal chamber 512.

[0072] In this embodiment, a bearing seat 500 is provided on the bottom wall of the outer drum 100. The bearing seat 500 is embedded in the center of the bottom wall of the outer drum 100 of the drum washing machine, which can ensure the stability and reliability of the bearing seat 500 in the outer drum 100. A front bearing 521 and a rear bearing 531 are provided inside the bearing seat 500 to firmly support the inner drum shaft 210. At the same time, an oil seal 600 is provided on the front side of the front bearing 521. The front bearing 521 and the rear bearing 531 are press-fitted into the bearing seat 500 of the outer drum 100, and the bearing seat 500 is embedded in the rear center of the outer drum 100 by injection molding. The inner drum shaft 210 is supported by the two bearings, the front bearing 521 and the rear bearing 531, and the front bearing 521 and the inner drum shaft 210 are interference fit. As a preferred embodiment, the bearing seat 500 and the outer drum 100 are an integral structure and are manufactured by injection molding. The second oil seal chamber 512 is confined within the through hole of the bearing housing 500 and is coaxially adjacent to the first oil seal chamber 511, ensuring that it cooperates with the first oil seal chamber 511 to form an integral oil seal chamber 510 for mounting the oil seal 600.

[0073] Specifically, the bearing housing 500 is cylindrical, with a through hole in the middle. The through hole contains a second oil seal chamber 512, a front bearing chamber 520, and a rear bearing chamber 530 in sequence. When the oil seal 600 is installed, the second body 620 of the oil seal 600 is sealed and installed in the second oil seal chamber 512, achieving a compression seal between the two chambers.

[0074] Furthermore, the second body 620 of the oil seal 600 is provided with at least one annular rib 621 on its outer periphery; the second body 620 and the second oil seal chamber 512 are sealed by compressing the annular rib 621.

[0075] In this embodiment, the second body 620 of the oil seal 600 is provided with at least one annular rib 621 on its outer periphery, which can increase the bonding strength between the oil seal 600 and the oil seal chamber 510. During installation, the second body 620 of the oil seal 600 is sealed and installed in the second oil seal chamber 512, and a seal is achieved between the second body 620 and the second oil seal chamber 512 by compressing the annular rib 621; at this time, the sealing lip 611 is located inside the first oil seal chamber 511 and is embedded in the groove provided in the peripheral wall of the first oil seal chamber 511. The structure of the oil seal 600 and the installation method in the oil seal chamber 510 can improve the sealing performance in the oil seal chamber 510, and also improve the stability and reliability of the drum washing machine during operation.

[0076] Furthermore, the diameter of the first oil seal chamber 511 is larger than the diameter of the second oil seal chamber 512.

[0077] In this embodiment, the diameter of the first oil seal chamber 511 is larger than the diameter of the second oil seal chamber 512, providing more space for the installation of the oil seal 600, ensuring smooth and unobstructed installation of the oil seal 600, and reducing friction and resistance during installation, thereby improving installation efficiency.

[0078] Furthermore, the first body 610 of the oil seal 600 extends outward from the radial direction of the oil seal 600 at the connection point with the second body 620 of the oil seal 600, and the outer diameter gradually increases; the sealing lip 611 is provided at the end of the first body 610 of the oil seal 600.

[0079] In this embodiment, the first body 610 of the oil seal 600 extends radially outward from the connection point with the second body 620 of the oil seal 600. During this extension, the outer diameter gradually increases, forming a trumpet-shaped structure. The sealing lip 611 is located at the end of the first body 610 of the oil seal 600. This design allows for smoother insertion into the groove of the oil seal chamber 510 during installation, significantly reducing resistance and friction and improving installation efficiency. Once the sealing lip 611 is fully inserted into the groove, its trumpet-shaped structure forms a tighter fit with the inner wall of the groove, effectively preventing the infiltration of liquids or dust and strengthening the sealing effect between the oil seal 600 and the oil seal chamber 510. This design further enhances the performance of the drum washing machine. By ensuring the seal between the inner drum shaft 210 and the bearing seat 500, the risk of malfunction due to leakage is reduced, while also helping to maintain the cleanliness of the washing machine's interior, improving washing performance and extending the washing machine's lifespan.

[0080] Furthermore, the oil seal 600 is a one-piece molded structure.

[0081] In this embodiment, the oil seal 600 is integrally molded. This design not only enhances the overall strength and durability of the oil seal 600, but also simplifies the installation process and improves production efficiency. The integrally molded oil seal 600, with its first body 610, second body 620, sealing lip 611, and other key components tightly connected during manufacturing, forms an inseparable whole, ensuring the stability and sealing performance of the oil seal 600 during use.

[0082] Specifically, the first body 610 and the second body 620 of the oil seal 600 constitute the oil seal body. A bracket is provided inside the body, and a mounting lip is also provided around the inner cylinder shaft 210. A fastener is provided on the outer periphery of the mounting lip, which can fix the oil seal 600 on the inner cylinder shaft 210 and fasten it by fasteners.

[0083] This design ensures precise matching and tight fit between components when the oil seal 600 is installed into the oil seal chamber 510, thereby improving the overall performance and reliability of the drum washing machine. At the same time, the one-piece molded structure of the oil seal 600 reduces the frequency of maintenance and replacement, providing users with a more convenient experience.

[0084] Based on the above-described configuration of the drum washing machine, the following steps may be included when assembling the inner drum 200 and the outer drum 100 of the drum washing machine:

[0085] The front bearing 521 is pressed into the front bearing chamber 520 inside the bearing housing 500 in sequence, and the oil seal 600 is pressed into the oil seal chamber 510, so that the front bearing 521 is fixed in the front bearing chamber 520; at the same time, the first body 610 of the oil seal 600 is sealed and installed in the first oil seal chamber 511, and the sealing lip 611 provided on the outer periphery of the first body 610 is embedded in the groove provided on the side wall of the first oil seal chamber 511; the second body 620 of the oil seal 600 is sealed and installed in the second oil seal chamber 512. At this time, the oil seal 600 is fixed on the outside of the front bearing 521.

[0086] The rear bearing 531 is press-fitted into the rear bearing chamber 530 inside the bearing housing 500, so that the rear bearing 531 is fixed in the rear bearing chamber 530.

[0087] The inner cylinder shaft 210 is press-fitted into the bearing housing 500, so that the front bearing 521 and the inner cylinder shaft 210 are interference fit, and the rear bearing 531 and the inner cylinder shaft 210 are interference fit or clearance fit.

[0088] In the above scheme, the installation structure of the oil seal 600 and its fit with the outer cylinder 100 can ensure the sealing between the oil seal 600 and the outer cylinder 100. Especially when the connection between the bottom wall 110 of the outer cylinder and the bearing seat 500 is not smooth and there are flashes, the tight seal between the oil seal 600 and the outer cylinder 100 can still be guaranteed.

[0089] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. The implementation schemes in the above embodiments can also be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A drum washing machine, wherein the drum washing machine is provided with an outer drum, the bottom wall of the outer drum is provided with an oil seal chamber, and an oil seal is provided in the oil seal chamber; characterized in that, The oil seal has a sealing lip on its outer periphery, and the sealing lip cooperates with the inner wall of the oil seal to seal.

2. The drum washing machine according to claim 1, characterized in that, The sealing lip is embedded in the peripheral wall of the oil seal chamber.

3. The drum washing machine according to claim 2, characterized in that, The oil seal chamber has an inwardly opening groove on its peripheral wall, and the groove is arranged in a ring along the peripheral wall; the sealing lip is pressed and embedded into the groove. Preferably, the opening of the groove extends outward from the radial direction of the oil seal; Preferably, the opening of the groove extends radially outward toward the bottom wall of the outer cylinder, offset from the oil seal.

4. The drum washing machine according to any one of claims 1-3, characterized in that, The oil seal chamber includes: a first oil seal chamber and a second oil seal chamber, wherein the second oil seal chamber is coaxially arranged with the first oil seal chamber; The oil seal comprises a first body and a second body connected sequentially along the axial direction; The first body and the second body of the oil seal are respectively sealed and installed in the first oil seal chamber and the second oil seal chamber; Preferably, the peripheral wall of the first oil seal chamber is provided with an inwardly opening groove, and the sealing lip is provided on the outer periphery of the first body, and the sealing lip cooperates with the groove to seal; Preferably, the peripheral walls of the first oil seal chamber and the second oil seal chamber are made of different materials, and / or the radial dimensions of the first oil seal chamber and the second oil seal chamber are different.

5. The drum washing machine according to claim 4, characterized in that, The first oil seal chamber is a cavity formed by a portion of the shaft hole penetrating the bottom wall of the outer cylinder expanding radially outward in the axial direction; Preferably, the first oil seal chamber is a cavity formed by radially expanding outward in the axial direction from one end of the shaft hole that penetrates the bottom wall of the outer cylinder near the inner side of the outer cylinder.

6. The drum washing machine according to claim 4, characterized in that, The second oil seal chamber is confined within the through hole of the bearing housing and is adjacent to the first oil seal chamber. The bearing housing is located within the bottom wall of the outer cylinder. The second body of the oil seal is squeezed and sealed with the second oil seal chamber.

7. The drum washing machine according to claim 6, characterized in that, The second body of the oil seal is provided with at least one ring of ribs around its outer periphery; The second body of the oil seal and the second oil seal chamber are sealed by extruding annular ribs.

8. The drum washing machine according to any one of claims 4-7, characterized in that, The diameter of the first oil seal chamber is larger than the diameter of the second oil seal chamber.

9. The drum washing machine according to claim 7, characterized in that, The first body of the oil seal extends outward from the radial direction of the oil seal at the connection point with the second body of the oil seal, and its outer diameter gradually increases; the sealing lip is provided at the end of the first body of the oil seal.

10. The drum washing machine according to any one of claims 1-9, characterized in that, The oil seal is a one-piece molded structure.

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