Washing machine oil seal

Abstract

The utility model discloses a washing machine oil seal which comprises a sealing body, a shaft sticking part is arranged on the inner side of the sealing body, a lip sealing part suitable for shaft sticking is arranged on the inner side wall of the shaft sticking part, the lip sealing part comprises at least one sealing lip, and an extrusion sealing part suitable for being extruded to deform is arranged on the outer side of the sealing body. The sealing structure has a good sealing effect.

Description

Technical Field

[0001] The utility model relates to an oil seal for a washing machine and belongs to the technical field of sealing. Background Art

[0002] Washing machines are commonly used household appliances. During the assembly process, the inner side of the oil seal needs to be in close contact with the main shaft of the washing machine, and the outer side of the oil seal needs to be in contact with the washing machine shell. There is water inside the washing machine cavity, so the sealing requirements for the oil seal are high. If the sealing is not good, water leakage will occur.

[0003] A Chinese patent application with application publication number CN110863326A discloses an oil seal for a washing machine, wherein an oil seal is installed on a second bearing seat on a second housing. The oil seal prevents water leakage, but since no sealing structure is provided between the outer side of the oil seal and the second bearing seat, water leakage may occur there. Summary of the invention

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a washing machine oil seal which has a good sealing effect.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a washing machine oil seal, comprising:

[0006] A sealing body, wherein a shaft-holding portion is provided on the inner side of the sealing body, a lip sealing portion suitable for holding the shaft is provided on the inner side wall of the shaft-holding portion, the lip sealing portion includes at least one sealing lip, and an extrusion sealing portion suitable for being extruded and deformed is provided on the outer side of the sealing body.

[0007] Furthermore, the sealing lips are provided with at least two in the axial direction, and a grease cavity for accommodating grease is formed between adjacent sealing lips.

[0008] Furthermore, the sealing lips are provided with three axial lines, one of which serves as a main lip.

[0009] Furthermore, in order to provide a certain clamping force compensation for the lip, a spring is provided on the outer side of the lip sealing portion at a position corresponding to the main lip.

[0010] Furthermore, the sealing lips are, from top to bottom, the first lip, the second lip and the third lip; wherein,

[0011] The dimensions of the first lip are as follows:

[0012] First front lip angle A: 35°~45°;

[0013] and / or first rear lip angle B: 25°~40°;

[0014] And / or the first lip angle α: 0° to 20°;

[0015] And / or the minimum lip thickness W: 0.3 to 0.6;

[0016] And / or the first lip height H: 1.5 to 2.5;

[0017] And / or the dimensional parameters of the second lip opening are as follows:

[0018] The second front lip angle C: 35° to 55° and / or the second rear lip angle D: 20° to 35°;

[0019] And / or the dimensional parameters of the third lip opening are as follows:

[0020] The third front lip angle E: 40° to 60° and / or the third rear lip angle F: 20° to 45°.

[0021] Furthermore, the lip seal portion is provided at the upper end of the inner side wall of the shaft-holding portion.

[0022] Furthermore, in order to support the lip seal portion and guide the shaft, a skeleton for supporting the lip seal portion and / or guiding the shaft is further provided on the shaft-holding portion.

[0023] Furthermore, in order to improve the follow-up performance of the lip seal portion and the shaft, the seal body further includes a follow-up arm portion connecting the shaft-holding portion and the extrusion seal portion.

[0024] Furthermore, the upper end portion of the follow-up arm portion is connected to the outer upper end portion of the shaft-holding portion, and the lower end portion of the follow-up arm portion is connected to the extrusion seal portion.

[0025] Furthermore, in order to be assembled with the housing and form a seal by extrusion to prevent water from leaking from the outside, the extrusion seal portion includes an extrusion ring located on the outside and a connecting arm. The lower end portion of the connecting arm is connected to the lower end portion of the follow-up arm portion, the upper end portion of the connecting arm is connected to the extrusion ring, and the cross-section of the connecting arm and the follow-up arm portion in the radial direction forms a V-shaped structure.

[0026] Furthermore, the cross-section of the extrusion ring in the radial direction is a semi-circular structure, and a convex ring protruding downward is provided at the free end of the extrusion ring.

[0027] Furthermore, the extrusion seal portion includes an extrusion ring located on the outside.

[0028] After adopting the above technical solution, for the shaft seal of the washing machine of the present utility model, a shaft holding portion is provided on the inner side thereof, and a lip seal portion is provided on the shaft holding portion to seal the shaft. At the same time, in order to support the lip seal portion and guide the shaft, a skeleton is provided below the shaft holding portion at the lip seal portion, and the shaft can pass through the skeleton to cooperate with the lip seal portion; in addition, an extrusion seal portion is provided on the outer side of the seal body of the shaft seal of the present utility model, and the extrusion seal portion can achieve good sealing with the housing assembly portion through extrusion to prevent water from leaking from the outside; in addition, the present utility model is also provided with a follower arm portion, and the follower performance of the lip seal portion and the shaft can be improved through the follower arm portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 FIG. is a schematic structural view of the oil seal of the washing machine of the present utility model;

[0030] Figure 2 is Figure 1 an enlarged view of part A in

[0031] Figure 3 FIG. is a schematic structural view of the lip seal portion of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] In order to make the content of the present utility model easier to be clearly understood, the present utility model will be further described in detail below according to specific embodiments and in conjunction with the accompanying drawings.

[0033] As Figures 1 to 3 shown, an oil seal for a washing machine includes:

[0034] A seal body, a shaft holding portion 1 is provided on the inner side of the seal body, and a lip seal portion 11 suitable for holding the shaft is provided on the inner side wall of the shaft holding portion 1. The lip seal portion 11 includes three seal lips, and an extrusion seal portion 2 suitable for being extruded and deformed is provided on the outer side of the seal body.

[0035] In this embodiment, a grease cavity for accommodating grease can be formed between adjacent seal lips.

[0036] In some embodiments, the seal lips can be provided with two or more than four, not limited to three.

[0037] In this embodiment, as Figure 3 shown, the seal lips are successively the first lip 11a, the second lip 11b and the third lip 11c from top to bottom; the first lip 11a blocks debris inside the washing machine cavity and plays a role in initially sealing water, the second lip 11b serves as the main lip and plays a main sealing role; the third lip 11c plays an auxiliary sealing role.

[0038] Specifically, as Figure 2 , 3As shown, a spring 12 is provided on the outer side of the lip seal portion 11 at the position corresponding to the main lip. The spring can be made of SUS304 stainless steel, mainly providing a certain clamping force compensation for the lip seal portion 11.

[0039] Specifically, as Figure 3 shown, the dimensional parameters of the first lip 11a are as follows:

[0040] The first front lip angle A: 35° - 45°;

[0041] The first rear lip angle B: 25° - 40°;

[0042] The first lip included angle α: 0° - 20°;

[0043] The minimum lip thickness W: 0.3 - 0.6;

[0044] The first lip height H: 1.5 - 2.5;

[0045] The dimensional parameters of the second lip 11b are as follows:

[0046] The second front lip angle C: 35° - 55° and / or the second rear lip angle D: 20° - 35°;

[0047] The dimensional parameters of the third lip 11c are as follows:

[0048] The third front lip angle E: 40° - 60° and / or the third rear lip angle F: 20° - 45°.

[0049] The lip seal portion 11 is provided at the upper end of the inner side wall of the shaft holding portion 1.

[0050] Specifically, as Figure 2 、 3 shown, a skeleton 13 for supporting and guiding the lip seal portion 11 is also provided on the shaft holding portion 1. The skeleton is made of a metal material, mainly playing the role of supporting the lip seal portion 11 and guiding the shaft.

[0051] Specifically, due to the large axial movement of the shaft, in order to improve the follow-up performance of the lip seal portion 11 and the shaft, as Figure 3 shown, the seal body further includes a follow-up arm portion 3 connecting the shaft holding portion 1 and the extrusion seal portion 2. The follow-up arm portion 3 can specifically be an L-shaped structure inclined in the axial direction.

[0052] Specifically, as Figure 2 、 3 shown, the upper end portion of the follow-up arm portion 3 is connected to the outer upper end portion of the shaft holding portion 1, and the lower end portion of the follow-up arm portion 3 is connected to the extrusion seal portion 2.

[0053] Specifically, as Figure 2 、 3As shown in the figure, the extrusion sealing part 2 includes an outer extrusion ring 21 and a connecting arm 22. The lower end of the connecting arm 22 is connected to the lower end of the follower arm part 3, and the upper end of the connecting arm 22 is connected to the extrusion ring 21. The cross-section of the connecting arm 22 and the follower arm part 3 in the radial direction forms a V-shaped structure.

[0054] Specifically, a groove is provided in the upper part of the shaft-holding part 1, and a lip seal part 1 extends upward from the inner side of the bottom wall of the groove. The lip seal part 1 may not exceed the groove at its highest point.

[0055] Specifically, as Figure 3 shown in the figure, the cross-section of the extrusion ring 21 in the radial direction is a semi-circular structure. A convex ring 21a protruding downward is provided at the free end of the extrusion ring 21, and the convex ring 21a can play a role in increasing the strength.

[0056] Specifically, the outer upper end of the shaft-holding part 1 extends outward and obliquely downward to form a follower arm part 3, then extends obliquely upward to form a connecting arm 22 and then extends to the extrusion ring 21 until the free end of the extrusion ring 21.

[0057] In this embodiment, the axial direction refers to the axial direction of the shaft, and the radial direction refers to the radial direction of the shaft.

[0058] The specific embodiments described above further elaborate on the technical problems solved, technical solutions, and beneficial effects of the present utility model. It should be understood that the above are only specific embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A washing machine oil seal, characterized in that: include: A sealing body, wherein a shaft-holding portion (1) is provided on the inner side of the sealing body, a lip sealing portion (11) suitable for holding the shaft is provided on the inner side wall of the shaft-holding portion (1), the lip sealing portion (11) comprising at least one sealing lip, and an extrusion sealing portion (2) suitable for being extruded and deformed is provided on the outer side of the sealing body.

2. The washing machine oil seal according to claim 1, characterized in that: The sealing lips are provided with at least two in the axial direction, and a grease cavity for accommodating grease is formed between adjacent sealing lips.

3. The washing machine oil seal according to claim 2, characterized in that: The sealing lips are provided with three axial lines, one of which is used as a main lip.

4. The washing machine oil seal according to claim 3, characterized in that: A spring (12) is provided on the outer side of the lip sealing portion (11) at a position corresponding to the main lip.

5. The washing machine oil seal according to claim 3, characterized in that: The sealing lips are, from top to bottom, a first lip (11a), a second lip (11b) and a third lip (11c); wherein, The size parameters of the first lip (11a) are as follows: First front lip angle A: 35°~45°; and / or first rear lip angle B: 25°~40°; and / or first lip angle α: 0° to 20°; and / or minimum lip thickness W: 0.3~0.6; and / or first lip height H: 1.5-2.5; And / or the size parameters of the second lip (11b) are as follows: Second front lip angle C: 35° to 55° and / or second rear lip angle D: 20° to 35°; And / or the size parameters of the third lip (11c) are as follows: The third front lip angle E: 40° to 60° and / or the third rear lip angle F: 20° to 45°.

6. The washing machine oil seal according to claim 1, characterized in that: The lip sealing portion (11) is arranged at the upper end of the inner side wall of the shaft-embracing portion (1).

7. The washing machine oil seal according to claim 1, characterized in that: The shaft-holding portion (1) is also provided with a frame (13) for supporting the lip sealing portion (11) and / or guiding the shaft.

8. The washing machine oil seal according to claim 1, characterized in that: The sealing body also includes a follower arm portion (3) connecting the shaft-holding portion (1) and the extrusion sealing portion (2).

9. The washing machine oil seal according to claim 8, characterized in that: The upper end of the follower arm portion (3) is connected to the outer upper end of the shaft-holding portion (1), and the lower end of the follower arm portion (3) is connected to the extrusion sealing portion (2).

10. The washing machine oil seal according to claim 9, characterized in that: The extrusion sealing portion (2) comprises an extrusion ring (21) and a connecting arm (22) located on the outside, the lower end of the connecting arm (22) is connected to the lower end of the follower arm portion (3), the upper end of the connecting arm (22) is connected to the extrusion ring (21), and the cross-section of the connecting arm (22) and the follower arm portion (3) in the radial direction forms a V-shaped structure.

11. The washing machine oil seal according to claim 10, characterized in that: The cross section of the extrusion ring (21) in the radial direction is a semicircular structure, and the free end of the extrusion ring (21) is provided with a convex ring (21a) protruding downwards.

12. The washing machine oil seal according to claim 1, characterized in that: The extrusion sealing portion (2) comprises an extrusion ring (21) located on the outside.

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