Oil seal structure of washing equipment and washing equipment

Abstract

The utility model discloses an oil seal structure of a washing device and the washing device, and the oil seal structure comprises a first oil seal which is provided with a first main body sleeved on the outer side of a rotating shaft; the second oil seal and the first oil seal are axially arranged side by side, and the second oil seal is provided with a second main body sleeving the outer side of the rotating shaft; a first main lip and a first auxiliary lip which are far away from each other in the inward direction are arranged on the inner side of the first main body, and the second main body is provided with a second main lip and a second auxiliary lip which are far away from each other in the inward direction; the first main lip and the second main lip are close to each other in the inward direction; an oil cavity used for containing lubricating grease is formed between the first oil seal and the second oil seal, and an oil supply port is formed between the first main lip and the second main lip. The first oil seal and the second oil seal are arranged in a relatively stable structure, so that grease in the oil cavity can be kept in a relatively stable state, and the phenomenon that the grease axially overflows due to the fact that the size of the oil cavity is changed due to deformation of the sealing lip is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of washing equipment, and particularly relates to an oil seal structure of a washing equipment and a washing equipment with the oil seal structure. BACKGROUND

[0002] The washing machine comprises an outer drum, an inner drum, a washing machine outer drum bottom at the rear end of the outer drum, an inner drum shaft of the inner drum, a shaft sleeve embedded in the washing machine outer drum bottom, and an inner drum assembly module connected to one end of the inner drum shaft. The shaft sleeve is assembled on the inner drum shaft. The motor drives the inner drum shaft to rotate, so that the inner drum rotates, and the washing machine realizes washing, dehydration and other functions. The shaft sleeve and the washing machine outer drum bottom have an oil seal. The oil seal is used to isolate the water in the inner and outer drums from the bearing. The shaft sleeve rotates under the drive of the inner drum shaft, while the oil seal is relatively stationary and fixed in the shaft hole of the bearing seat of the washing machine outer drum bottom, and directly surrounds the inner drum shaft or the shaft sleeve outside the inner drum shaft.

[0003] The main structure of the commonly used oil seal includes a dust lip, a main lip, a secondary lip, a clamping spring and a metal skeleton. The main lip is self-tightened and compensated by the clamping spring to ensure that the oil seal still has good sealing performance when there is an installation deviation, and can prevent early leakage of the oil seal. However, the lip is clamped on the shaft sleeve of the rotating main shaft by the clamping spring to form a seal. Since there is no lubricating medium, the sealing lip and the shaft sleeve are easily damaged due to rapid wear.

[0004] Patent CN201720947472.7 discloses an oil seal, which comprises an oil seal body and a support embedded in the oil seal body. The oil seal body comprises a main lip and a secondary lip arranged around a drive shaft. In the installed state, the secondary lip is located above the main lip. The outer side of the main lip is provided with a first fastener, and the first fastener fastens the main lip on the drive shaft. The outer side of the secondary lip is provided with a second fastener, and the second fastener fastens the secondary lip on the drive shaft. The oil seal body further comprises a main lip waist and a secondary lip waist. The main lip waist is located between the main lip and the secondary lip and connected to the main lip. The secondary lip waist is located between the main lip and the secondary lip and connected to the secondary lip. The main lip waist and the secondary lip waist surround an oil cavity, and grease with sealing and lubricating effects is filled in the oil cavity. The wear of the main lip and the secondary lip during high-speed rotation of the drive shaft is reduced, and the service life of the oil seal is prolonged.

[0005] The oil cavity in the above-mentioned patent is formed by the main lip waist, the secondary lip waist and the shaft sleeve. The problems are as follows: first, the oil cavity space is small, and the amount of stored grease is small. During the operation of the washing machine, the grease in the oil cavity will be consumed, and finally there will be no grease between the sealing lip and the shaft sleeve. Second, when the rotating main shaft shakes, it will squeeze the sealing lip, change the size of the oil cavity, cause the axial overflow of the grease, further reduce the grease, and cause pollution to the washing water.

[0006] The above information disclosed in this BACKGROUND section is only for increasing the understanding of the background of the application, and therefore, can include information that does not constitute prior art that is already known in this field. SUMMARY

[0007] The utility model discloses to the above -mentioned problem in prior art, propose a kind of oil seal structure of washing equipment, can accommodate more lubricating grease, reduce the unnecessary loss of grease, guarantee sealing effect, effectively reduce friction and wear.

[0008] To achieve the above-mentioned utility model purposes, the utility model adopts the following technical solutions to achieve:

[0009] An oil seal structure of washing equipment, comprising:

[0010] A first oil seal having a first body fitted outside a rotating shaft;

[0011] A second oil seal axially arranged side by side with the first oil seal and having a second body fitted outside the rotating shaft;

[0012] The first body has a first main lip and a first secondary lip facing away from each other in an inward direction, and the second body has a second main lip and a second secondary lip facing away from each other in an inward direction; the first main lip and the second main lip face each other in an inward direction;

[0013] The first oil seal and the second oil seal have an oil cavity for accommodating lubricating grease between them, and an oil supply port is formed between the first main lip and the second main lip.

[0014] In some embodiments of the present application, first and second extension ribs are respectively arranged axially close to each other on the first and second oil seals, and the first and second extension ribs separate the space between the first and second oil seals into an oil cavity on the inner side and a cavity on the outer side.

[0015] In some embodiments of the present application, the first body has a first radial portion arranged radially, a first axial portion bent towards the second oil seal in an outward direction of the first radial portion and extending axially, and the first extension rib is arranged on the first radial portion.

[0016] In some embodiments of the present application, the second body has a second radial portion arranged radially and a second axial portion bent towards the first oil seal in an outward direction of the second radial portion and extending axially, and the second extension rib is arranged on the second radial portion.

[0017] In some embodiments of the present application, the second oil seal is located close to the shaft end, and the distance between the second axial portion and the shaft axis is greater than the distance between the first axial portion and the shaft axis.

[0018] In some embodiments of the present application, the oil seal structure further comprises an insert located between the first oil seal and the second oil seal, and the inner side of the insert is surrounded by the first oil seal and the second oil seal to form the oil cavity.

[0019] In some embodiments of the present application, the first main body has a first radial portion arranged in radial extension, the second main body has a second radial portion arranged in radial extension, and the insert has an inner insert portion located on the inner side, and the two ends of the inner insert portion abut against the first radial portion and the second radial portion, respectively.

[0020] In some embodiments of the present application, the inner insert portion is an outwardly convex arc structure.

[0021] In some embodiments of the present application, a mounting notch is provided in the first radial portion and / or the second radial portion, and the end portion of the inner insert portion is located in the mounting notch.

[0022] In some embodiments of the present application, a plurality of tooth-shaped grooves are provided in the first radial portion and / or the second radial portion, a plurality of tooth-shaped grooves are provided in the tooth-shaped grooves, and the axial projection of the insert is located in the tooth-shaped grooves.

[0023] In some embodiments of the present application, the first main body further has a first axial portion bent towards the second oil seal along the outer side of the first radial portion and extending in the axial direction, the insert further has an outer insert portion abutting against the first axial portion, and the two ends of the outer insert portion abut against the first radial portion and the second radial portion, respectively.

[0024] In some embodiments of the present application, the insert further has a middle insert portion located between the inner insert portion and the outer insert portion, the middle insert portion is arranged in spaced relation with the outer insert portion, and the two ends of the middle insert portion abut against the first radial portion and the second radial portion, respectively.

[0025] In some embodiments of the present application, the insert further has a first connecting portion connected between the outer insert portion and the middle insert portion, and a second connecting portion connected between the middle insert portion and the inner insert portion.

[0026] In some embodiments of the present application, the oil seal structure further has a third oil seal, and the first oil seal is located between the second oil seal and the third oil seal.

[0027] In some embodiments of the present application, the second main body is further provided with a third sub-lip which is arranged in an inward direction away from the first oil seal direction, the second sub-lip is located between the second main-lip and the third sub-lip, and the second sub-lip and the third sub-lip are away from each other in the inward direction.

[0028] Based on the above oil seal structure, the present application further provides a washing device with the above oil seal structure, which can accommodate more lubricating grease, reduce unnecessary loss of grease, ensure sealing effect, and effectively reduce friction and wear.

[0029] A washing device has a rotatable inner drum, a rotating shaft connected to the inner drum, a shaft sleeve sleeved on the rotating shaft, and an oil seal structure sleeved on the outer side of the shaft sleeve.

[0030] Compared with the prior art, the oil cavity is formed by the space between the first oil seal and the second oil seal, so that the oil cavity space is relatively larger and can accommodate more lubricating grease; the lubrication state between the sealing lip and the shaft sleeve can be better maintained, wear is reduced, and the service life of the oil seal structure is prolonged. The relatively stable structure of the first oil seal and the second oil seal enables the grease in the oil cavity to remain in a relatively stable state, and prevents the grease from overflowing axially due to deformation of the sealing lip; this not only reduces unnecessary loss of grease, but also avoids pollution of the washing water caused by grease overflow, thereby ensuring normal operation of the washing device and cleanliness of the washing water. The arrangement of the first main-lip and the first sub-lip of the first oil seal and the second main-lip and the second sub-lip of the second oil seal forms multiple sealing lines in the axial direction, which can effectively prevent liquid and other media from leaking from the oil seal. Moreover, the first main-lip and the second main-lip are close to each other in the inward direction, and the oil supply port formed between the first main-lip and the second main-lip enables the lubricating grease in the oil cavity to be accurately supplied to the key position where the rotating shaft contacts the main-lip, and the grease is uniformly distributed between the sealing lip and the rotating shaft through the oil supply port, which is like establishing a continuous lubricating oil film between two rubbing parts, thereby effectively reducing friction and wear. The sealing effect can be better ensured, and the reliability of the washing device is improved.

[0031] Other features and advantages of the present application will become more apparent after reading the detailed implementation of the present application in combination with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0033] Figure 1 This is a schematic diagram of the first embodiment of the oil seal structure of a washing device proposed in this utility model;

[0034] Figure 2 for Figure 1 A cross-sectional structural diagram;

[0035] Figure 3 for Figure 2 Enlarged structural diagram of region A in the middle;

[0036] Figure 4 for Figure 3 Enlarged structural diagram of the first oil seal in the middle;

[0037] Figure 5 for Figure 3 Enlarged structural diagram of the second oil seal;

[0038] Figure 6 This is a schematic diagram of the second embodiment of the oil seal structure of a washing device proposed in this utility model;

[0039] Figure 7 for Figure 6 A cross-sectional structural diagram;

[0040] Figure 8 for Figure 7 Enlarged structural diagram of the first oil seal in the middle;

[0041] Figure 9 for Figure 7 Enlarged structural diagram of the second oil seal;

[0042] Figure 10 for Figure 7 Enlarged structural diagram of the inlay;

[0043] Among them, the oil seal structure is 100;

[0044] First oil seal 10; First body 11; First radial portion 111; First axial portion 112; First main lip 113; First secondary lip 114; Toothed groove 115; First extension rib 12; First support member 13;

[0045] Second oil seal 20; Second body 21; Second radial portion 211; Second axial portion 212; Second main lip 213; Second secondary lip 214; Mounting slot 215; Third secondary lip 216; Second extension rib 22; Second support member 23;

[0046] Oil cavity 30; oil supply port 31;

[0047] Insert 40; inner insert portion 41; outer insert portion 42; middle insert portion 43; first connecting portion 44; second connecting portion 45;

[0048] Third oil seal 50;

[0049] Rotating shaft 200; shaft sleeve 210. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application.

[0051] In the description of the present application, it should be noted that the positions or location relationships indicated by the terms "upper", "lower", "left", "right" and the like are based on the position relationship shown in the drawings, and the direction close to the axis of the oil seal structure is "inner", and vice versa. The terms are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance; the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0052] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0053] In the present application, unless otherwise specifically defined and limited, the "upper" or "lower" of the first feature in the second feature can include the direct contact of the first and second features, or it can include the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature in the second feature include the vertical direction of the first feature above and obliquely above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature in the second feature include the vertical direction of the first feature below and obliquely below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0054] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0055] Whenever possible, the various aspects and features described and shown in the specification can be applied individually, and these individual aspects can serve as the subject of a divisional application. Example 1

[0056] See Figures 1-5 This is the first embodiment of an oil seal structure for a washing device proposed in this utility model. The oil seal structure 100 of the washing device includes: a first oil seal 10 and a second oil seal 20, which are arranged side-by-side in the axial direction, with an oil cavity 30 for accommodating lubricating grease between them. The first oil seal 10 has a first body 11 sleeved on the outside of a rotating shaft 200, and a first main lip 113 and a first secondary lip 114 disposed on the inner side of the first body 11, which are spaced apart from each other in an inward direction, with the direction closer to the axis being inward. The second oil seal 20 has a second body 21 sleeved on the outside of the rotating shaft 200, and the second body 21 has a second main lip 213 and a second secondary lip 214 disposed apart from each other in an inward direction. The first main lip 113 and the second main lip 213 approach each other inward, and an oil supply port 31 is formed between the first main lip 113 and the second main lip 213; the grease in the oil cavity 30 flows inward through the oil supply port 31 to the friction surface of the first main lip 113 and the second main lip 213 to achieve lubrication during relative rotation.

[0057] In this embodiment, the rotating shaft 200 is sleeved with a shaft sleeve 210, and the oil seal structure 100 is sleeved outside the shaft sleeve 210; the main lip and the secondary lip belong to the sealing lip. The oil cavity 30 is formed by the space between the first oil seal 10 and the second oil seal 20, so that the space of the oil cavity 30 is relatively larger and can accommodate more lubricating grease; the lubrication state between the sealing lip and the shaft sleeve 210 can be better maintained, wear is reduced, and the service life of the oil seal structure 100 is prolonged. The relatively stable structure of the first oil seal 10 and the second oil seal 20 enables the grease in the oil cavity 30 to remain in a relatively stable state, and prevents the grease from overflowing axially due to the change in the size of the oil cavity caused by the deformation of the sealing lip; in this way, unnecessary loss of grease is reduced, and pollution of the washing water caused by grease overflow is avoided, ensuring the normal operation of the washing equipment and the cleanliness of the washing water. The first main lip 113 and the first secondary lip 114 of the first oil seal 10 and the second main lip 213 and the second secondary lip 214 of the second oil seal 20 are arranged in such a way that multiple sealing lines are formed in the axial direction, which can effectively prevent liquid and other media from leaking from the oil seal. Moreover, the first main lip 113 and the second main lip 213 are arranged to approach each other in the inward direction, and the oil supply port 31 formed between the first main lip 113 and the second main lip 213 enables the lubricating grease in the oil cavity 30 to be accurately supplied to the key position where the rotating shaft 200 contacts the main lip, and the grease is uniformly distributed between the sealing lip and the shaft sleeve 210 through the oil supply port, which is like establishing a continuous lubricating oil film between two mutually rubbing parts, thereby effectively reducing friction and wear. The sealing effect can be better guaranteed, and the reliability of the washing equipment is improved.

[0058] In some embodiments of the present application, the first oil seal 10 and the second oil seal 20 are respectively provided with first extension ribs 12 and second extension ribs 22 arranged to approach each other in the axial direction, and the first extension ribs 12 and the second extension ribs 22 separate the space between the first oil seal 10 and the second oil seal 20 into an oil cavity on the inner side and a cavity on the outer side. By arranging the first extension ribs 12 and the second extension ribs 22, the oil cavity and the cavity are separated, avoiding the storage of excessive grease and increasing the cost; during the operation of the washing equipment, the grease may have a tendency to flow outward due to the centrifugal force generated by the rotation of the rotating shaft 200, and by arranging the first extension ribs 12 and the second extension ribs 22, the grease is better confined in the oil cavity 30 close to the rotating shaft 200, ensuring that the grease can provide lubrication for the sealing lip. The arrangement of the first extension ribs 12 and the second extension ribs 22 increases the structural strength.

[0059] In some embodiments of the present application, the first body 11 has a first radial portion 111 arranged in radial extension, a first axial portion 112 arranged in axial extension and bent towards the second oil seal 20 along the outer side of the first radial portion 111, and the first extension rib 12 is arranged on the first radial portion 111. The first radial portion 111 can provide radial support, and the first axial portion 112 can increase the strength of the first oil seal 10 in the axial direction. The second body 21 has a second radial portion 211 arranged in radial extension, a second axial portion 212 arranged in axial extension and bent towards the first oil seal 10 along the outer side of the second radial portion 211, and the second extension rib 22 is arranged on the second radial portion 212. The first axial portion 112 and the second radial portion 212 are opposite and extend in the same direction, which can increase the structural strength and form a cavity outside the oil cavity 30, thereby increasing the protection of the oil cavity 30.

[0060] In some embodiments of the present application, the second oil seal 20 is arranged near the shaft end, and the distance between the second axial portion 211 and the axis is greater than the distance between the first axial portion 111 and the axis. The greater distance between the second axial portion 211 and the axis allows the second oil seal 20 to have a larger coverage range near the shaft end, which can better cope with various working conditions, and facilitates the installation of the oil seal structure 100. The first oil seal 10 further comprises a first support 13, and the first body 11 is wrapped on the outer side of the first support 13. The second oil seal 20 further comprises a second support 23, and the second body 21 is wrapped on the outer side of the second support 23.

[0061] In some embodiments of the present application, the inner side of the second body 21 further comprises a third sub-lip 216 arranged in an inward direction and inclined away from the first oil seal 10, the second sub-lip 214 is located between the second main-lip 213 and the third sub-lip 216, and the second sub-lip 214 and the third sub-lip 216 are away from each other in the inward direction. The third sub-lip 216 improves the sealing capacity of the oil seal structure 100 as a whole, effectively prevents liquid leakage and the entry of impurities, and ensures the normal operation of the washing equipment under various working conditions. During the operation of the washing equipment, the oil seal structure 100 will be subjected to external forces such as vibration and axial force from the rotating shaft 200; as part of the oil seal structure, the third sub-lip 216 can share part of the external force, and the third sub-lip can disperse and transmit part of the external force through its contact with the shaft sleeve 210 and its connection with the second main-lip 213 and the second sub-lip 214, thereby avoiding excessive local stress and damage to a certain sealing lip or oil seal component. Embodiment two

[0062] Reference Figures 6-10 , is a second embodiment of an oil seal structure of a washing equipment according to the present application, and the main difference between the present embodiment and the first embodiment is that an insert 40 is arranged to surround the oil cavity 30, and other structures can be the same as those of the first embodiment.

[0063] In this embodiment, the oil seal structure 100 of the washing equipment comprises a first oil seal 10 and a second oil seal 20, which are arranged side by side in the axial direction and have an oil cavity 30 for accommodating lubricating grease between the first oil seal 10 and the second oil seal 20. The first oil seal 10 has a first main body 11 sleeved outside the rotating shaft 200, and the inner side of the first main body 11 is provided with a first main lip 113 and a first secondary lip 114 which are away from each other in the inward direction, and the direction close to the axis is the inner side. The second oil seal 20 has a second main body 21 sleeved outside the rotating shaft 200, and the second main body 21 has a second main lip 213 and a second secondary lip 214 which are away from each other in the inward direction. The first main lip 113 and the second main lip 213 are close to each other in the inward direction, and an oil supply port 31 is formed between the first main lip 113 and the second main lip 213; the grease in the oil cavity 30 flows inward onto the friction surfaces of the first main lip 113 and the second main lip 213 through the oil supply port 31, achieving lubrication during relative rotation.

[0064] In this embodiment, the rotating shaft 200 is sleeved with a shaft sleeve 210, and the oil seal structure 100 is sleeved outside the shaft sleeve 210; both the main lip and the secondary lip belong to the sealing lip. The oil cavity 30 is formed by the space between the first oil seal 10 and the second oil seal 20, so that the space of the oil cavity 30 is relatively larger and can accommodate more lubricating grease; the lubrication state between the sealing lip and the shaft sleeve 210 can be better maintained, wear is reduced, and the service life of the oil seal structure 100 is prolonged. The relatively stable structure of the first oil seal 10 and the second oil seal 20 enables the grease in the oil cavity 30 to remain in a relatively stable state, and the grease will not overflow axially due to the change in the size of the oil cavity caused by the deformation of the sealing lip; this not only reduces unnecessary loss of grease, but also avoids the situation of pollution of washing water caused by overflow of grease, ensuring the normal operation of the washing equipment and the cleanliness of the washing water. The arrangement of the first main lip 113 and the first secondary lip 114 of the first oil seal 10 and the second main lip 213 and the second secondary lip 214 of the second oil seal 20 forms multiple sealing lines in the axial direction, which can effectively prevent liquid and other media from leaking from the oil seal. Moreover, the first main lip 113 and the second main lip 213 are close to each other in the inward direction, and the oil supply port 31 is formed between the first main lip 113 and the second main lip 213, so that the lubricating grease in the oil cavity 30 is accurately supplied to the key position where the rotating shaft 200 contacts the main lip, and the grease is uniformly distributed between the sealing lip and the shaft sleeve 210 through the oil supply port, like establishing a continuous lubricating oil film between two mutually rubbing parts, thereby effectively reducing friction and wear. The sealing effect can be better guaranteed, and the reliability of the washing equipment is improved.

[0065] In some embodiments of the present application, the oil seal structure 100 further comprises an insert 40 located between the first oil seal 10 and the second oil seal 30, and the inner side of the insert 40 is surrounded by the first oil seal 10 and the second oil seal 20 to form an oil cavity 30. By providing the insert 40, the inner side of the insert 40 is the oil cavity 30, which avoids storing excess oil, resulting in increased cost; during the operation of the washing equipment, the oil may have a tendency to flow outward due to the centrifugal force generated by the rotation of the rotating shaft 200, and by providing the insert 40, the oil is better confined in the oil cavity 30 close to the rotating shaft 200, ensuring that the oil can provide lubrication for the sealing lip. And according to the requirements of the specific washing equipment, the volume of the oil cavity can be accurately adjusted by adjusting the insert 40.

[0066] In some embodiments of the present application, the first body 11 has a first radial portion 111 arranged in a radial direction, and the second body 21 has a second radial portion 211 arranged in a radial direction. The insert 40 has an inner insert portion 41 located on the inner side, and the two ends of the inner insert portion 41 are two end portions in the axial direction, and the two ends of the inner insert portion 41 abut against the first radial portion 111 and the second radial portion 211 respectively. The inner insert portion 41 is tightly abutted against the first radial portion 111 and the second radial portion 211, forming a relatively closed barrier that can effectively prevent oil from leaking outward from the oil cavity 30. The outer convex arc-shaped structure of the inner insert portion 41 can effectively guide the flow of oil in the oil cavity 30. The outer convex arc-shaped inner insert portion has good elasticity and adaptability, and has a large supporting force.

[0067] In some embodiments of the present application, the second radial portion 211 is provided with a mounting slot 215, and one end of the inner insert portion 41 is located in the mounting slot 215. A mounting slot matching the end of the inner insert portion 41 can also be provided on the first radial portion 111. The mounting slot 215 provides a specific placement position for the end of the inner insert portion 41, so that the insert can be accurately positioned during installation. The operator only needs to align the end of the inner insert portion 41 of the insert 40 with the mounting slot 215 to complete the installation of the insert 40, which is simple to operate; can save installation time, and can reduce the oil seal structure failure caused by improper installation, and improve the accuracy and reliability of the installation. The cooperation of the end of the inner insert portion 41 and the mounting slot 215 forms a more stringent sealing structure.

[0068] In some embodiments of the present application, a plurality of tooth-shaped grooves 115 are arranged circumferentially on the first radial portion 111, and a plurality of tooth-shaped ribs are arranged radially in the tooth-shaped grooves 115; the axial projection of the insert 40 is located in the tooth-shaped grooves 115. A plurality of tooth-shaped grooves can also be arranged on the second radial portion 211. The tooth-shaped grooves 115 facilitate the exchange of a small amount of gas between the oil cavity 30 and the outside world, maintain the air pressure balance in the oil cavity 30, and keep the air in the oil cavity 30 fresh, thereby reducing the oxidation rate of the oil and prolonging the service life of the oil. When the washing equipment is subjected to external impact or vibration, the tooth-shaped ribs in the tooth-shaped grooves 115 can act as a buffer, and the tooth-shaped ribs arranged radially can disperse and absorb impact forces from different directions to a certain extent. The presence of the tooth-shaped grooves 115 and the tooth-shaped ribs increases the friction between the insert 40 and the first radial portion 111, preventing the insert 40 from easily sliding or shifting under external force.

[0069] In some embodiments of the present application, the first body 11 further has a first axial portion 112 that bends towards the second oil seal 20 along the outer side of the first radial portion 111 and extends axially. The insert 40 further has an outer insert portion 42 that abuts against the first axial portion 112, and the two ends of the outer insert portion 42 abut against the first radial portion 111 and the second radial portion 211, respectively, and the outer side of the outer insert portion 42 abuts against the first axial portion 112. The two ends of the outer insert portion 42 abut against the first radial portion 111 and the second radial portion 112, respectively, and the outer side abuts against the first axial portion 111, forming a multi-directional connection and support structure that effectively prevents the insert 40 from shifting during use.

[0070] In some embodiments of the present application, the insert 40 further has a middle insert portion 43 located between the inner insert portion 41 and the outer insert portion 42, and the middle insert portion 43 is spaced apart from the outer insert portion 42, with the two ends of the middle insert portion 43 abutting against the first radial portion 111 and the second radial portion 211, respectively; forming a more stable support system for the insert 40, making the position of the insert 40 in the oil seal structure more fixed. The insert 40 further has a first connecting portion 44 connected between the outer insert portion 42 and the middle insert portion 43, and a second connecting portion 45 connected between the middle insert portion 43 and the inner insert portion 41. The outer insert portion 42, the middle insert portion 43, and the inner insert portion 41 are connected through the first connecting portion 44 and the second connecting portion 45, increasing the overall rigidity of the insert 40.

[0071] In some embodiments of the present application, the oil seal structure 100 further has a third oil seal 50, and the first oil seal 10 is located between the second oil seal 20 and the third oil seal 50; making the sealing layout of the oil seal structure in the axial direction more reasonable. The multi-layer oil seal structure can adapt to the complex and variable working conditions of the washing equipment. In different working stages, such as washing, rinsing, and dehydration, the internal pressure, liquid flow state, and external environment of the equipment are different.

[0072] The above examples are only used to illustrate the technical solutions of the present application, but not to limit them. Although the present application has been described in detail with reference to the foregoing examples, the technical solutions recorded in the foregoing examples can still be modified by those of ordinary skill in the art, or some of the technical features can be replaced equivalently. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions claimed by the present application.

Claims

1. An oil seal structure for a washing device, characterized in that, include: The first oil seal has a first body sleeved on the outside of the rotating shaft; The second oil seal is arranged axially alongside the first oil seal and has a second body sleeved on the outside of the rotating shaft; The first main body has a first main lip and a first secondary lip that are spaced apart from each other in an inward direction on its inner side, and the second main body has a second main lip and a second secondary lip that are spaced apart from each other in an inward direction; The first and second primary lips approach each other in an inward direction; There is an oil cavity for containing lubricating grease between the first oil seal and the second oil seal, and an oil supply port is formed between the first main lip and the second main lip.

2. The oil seal structure according to claim 1, characterized in that, The first oil seal and the second oil seal are respectively provided with a first extension rib and a second extension rib arranged axially close to each other. The first extension rib and the second extension rib divide the space between the first oil seal and the second oil seal into an oil cavity located on the inner side and an empty cavity located on the outer side.

3. The oil seal structure according to claim 2, characterized in that, The first body has a first radial portion extending radially, a first axial portion that bends outward from the outer side of the first radial portion toward the direction of the second oil seal and extends axially, and the first extension rib is provided on the first radial portion; The second body has a second radial portion extending radially and a second axial portion that bends outward toward the first oil seal and extends axially, with the second extension rib provided on the second radial portion; The second oil seal is located near the shaft end, and the distance between the second axial portion and the axis is greater than the distance between the first axial portion and the axis.

4. The oil seal structure according to claim 1, characterized in that, The oil seal structure further includes an insert located between the first oil seal and the second oil seal, the inner side of which surrounds the first oil seal and the second oil seal to form the oil cavity.

5. The oil seal structure according to claim 4, characterized in that, The first main body has a first radial portion extending radially, the second main body has a second radial portion extending radially, and the insert has an inner portion located on the inner side, with the two ends of the inner portion abutting against the first radial portion and the second radial portion respectively; the inner portion is an outwardly convex arc-shaped structure.

6. The oil seal structure according to claim 5, characterized in that, The first radial portion and / or the second radial portion are provided with mounting slots, and the end of the inset portion is located within the mounting slot.

7. The oil seal structure according to claim 5, characterized in that, The first radial portion and / or the second radial portion are provided with a plurality of toothed grooves, and a plurality of radially arranged toothed ribs are provided in the toothed grooves, and the axial projection of the insert is located in the toothed grooves.

8. The oil seal structure according to any one of claims 5 to 7, characterized in that, The first body also has a first axial portion that bends and extends axially toward the second oil seal along the outer side of the first radial portion, and the insert also has an outer portion that abuts against the first axial portion, with the two ends of the outer portion abutting against the first radial portion and the second radial portion, respectively.

9. The oil seal structure according to claim 8, characterized in that, The insert also has a middle insert located between the inner insert and the outer insert, the middle insert being spaced apart from the outer insert, and the two ends of the middle insert abutting against the first radial portion and the second radial portion, respectively; the insert also has a first connecting portion connecting between the outer insert and the middle insert, and a second connecting portion connecting between the middle insert and the inner insert.

10. A washing device comprising a rotatable inner drum, a rotating shaft connected to the inner drum, and a bushing sleeved on the rotating shaft, characterized in that, It also has an oil seal structure as described in any one of claims 1 to 9, which is sleeved on the outside of the bushing.

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