A new double-lip sealing structure

Abstract

The present invention provides a novel double-lip seal structure, comprising a bearing inner ring sealing groove bevel, a bearing inner ring sealing groove rib, and a sealing ring. The sealing ring is clamped between the bearing inner ring sealing groove bevel and the bearing inner ring sealing groove rib. The sealing ring comprises a sealing ring body, a sealing ring inner lip, and a sealing ring outer lip. The sealing ring inner lip and the sealing ring outer lip are respectively arranged at the upper and lower ends of the outer side surface of the sealing ring body. The sealing ring inner lip and the bearing inner ring sealing groove bevel are mutually abutted, and the sealing ring inner lip and the bearing inner ring sealing groove rib are mutually abutted. The length of the horizontal connecting end of the sealing ring inner lip and the sealing ring outer lip at the root is A, and the length of the horizontal connecting end of the bearing inner ring sealing groove bevel and the bottom root of the bearing inner ring sealing groove rib is B. A is greater than B but not greater than 2B. The present invention has a simple structure and is easy to operate. After the sealing ring is installed, the inner lip is completely in contact with the inner ring sealing groove bevel, and the outer lip is interference fit with the sealing groove rib, resulting in an excellent sealing effect.

Description

Technical Field

[0001] The present invention mainly relates to the field of sealing, and in particular to a novel double-lip sealing structure. Background Art

[0002] See attached Figure 3 and 4 Conventional double-lip seal structure: the inner and outer lips of the bearing sealing ring are interference fit with the bevel edge and rib of the bearing inner ring sealing groove respectively.

[0003] Because the inner and outer lips are close to each other, the lips are related to each other and interfere with each other. For example, when the outer lip contacts the inner ring sealing groove rib, it will cause the inner lip to change, change the shape of the inner lip, and thus affect the sealing effect. Similarly, when the inner lip contacts the side of the inner ring sealing groove, it will cause the outer lip to change. The interference fit between the inner and outer lips and the inner ring sealing groove is uneven on the circumference. The contact amount in some parts becomes larger, the contact amount in some parts becomes smaller, or even no contact, so the expected sealing effect cannot be achieved. Summary of the Invention

[0004] In response to the above-mentioned defects of the prior art, the present invention provides a novel double-lip sealing structure, comprising a bearing inner ring sealing groove inclined surface 1, a bearing inner ring sealing groove rib 2 and a sealing ring, wherein the sealing ring is clamped between the bearing inner ring sealing groove inclined surface 1 and the bearing inner ring sealing groove rib 2, and the sealing ring comprises a sealing ring body 3, a sealing ring inner lip 4 and a sealing ring outer lip 5, wherein the sealing ring inner lip 4 and the sealing ring outer lip 5 are respectively arranged at the upper and lower ends of the outer side surface of the sealing ring body 3, the sealing ring inner lip 4 and the bearing inner ring sealing groove inclined surface 1 are mutually abutted, and the sealing ring inner lip 4 and the bearing inner ring sealing groove rib 2 are mutually abutted;

[0005] The length of the horizontal connection between the roots of the inner lip 4 and the outer lip 5 of the sealing ring is A, and the length of the horizontal connection between the bottom roots of the inclined surface 1 of the inner ring sealing groove of the bearing and the rib 2 of the inner ring sealing groove of the bearing is B;

[0006] A is greater than B, but not greater than 2B.

[0007] Preferably, the inner lip 4 of the sealing ring is in a quadrilateral shape. After the sealing ring is installed, the inner lip 4 of the sealing ring is completely fitted with the inclined surface 1 of the sealing groove of the inner ring of the bearing.

[0008] Preferably, after the sealing ring is installed, a sharp corner is provided at the bottom of the inner lip 4 of the sealing ring to abut against the angle of the bottom surface of the inclined surface 1 of the sealing groove of the inner ring of the bearing.

[0009] Preferably, the length of the inner lip 4 of the sealing ring close to the inclined surface 1 of the inner ring sealing groove of the bearing is not greater than the length of the inclined surface 1 of the inner ring sealing groove of the bearing, and is not less than 70% of the length of the inclined surface 1 of the inner ring sealing groove of the bearing.

[0010] Preferably, the length of the inner lip 4 of the sealing ring close to the inclined surface 1 of the bearing inner ring sealing groove is consistent with the length of the inclined surface 1 of the bearing inner ring sealing groove.

[0011] Preferably, the width of the bottom of the inner lip 4 of the sealing ring is not greater than B.

[0012] Preferably, the outer lip 5 of the sealing ring is interference fit with the sealing groove rib 2 of the bearing inner ring.

[0013] The invention has the following beneficial effects: simple structure, easy operation, after the sealing ring is installed, the inner lip is completely fitted with the inclined surface of the inner ring sealing groove, the outer lip is interference fit with the sealing groove rib, and the sealing effect is excellent. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the present invention;

[0015] Figure 2 It is a usage state diagram of the present invention;

[0016] Figure 3 It is a structural diagram of the prior art;

[0017] Figure 4 It is a partial structural diagram of the prior art;

[0018] In the figure,

[0019] 1. Inclined surface of the bearing inner ring sealing groove; 2. Rib of the bearing inner ring sealing groove; 3. Sealing ring body;

[0020] 4. Inner lip of the sealing ring; 5. Outer lip of the sealing ring. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present invention and to make the above-mentioned features, purposes and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with examples. The examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0022] like Figure 1-2 As shown, the present invention includes: a bearing inner ring sealing groove inclined surface 1, a bearing inner ring sealing groove rib 2 and a sealing ring, wherein the sealing ring is clamped between the bearing inner ring sealing groove inclined surface 1 and the bearing inner ring sealing groove rib 2, and the sealing ring includes a sealing ring body 3, a sealing ring inner lip 4 and a sealing ring outer lip 5, wherein the sealing ring inner lip 4 and the sealing ring outer lip 5 are respectively arranged at the upper and lower ends of the outer side surface of the sealing ring body 3, the sealing ring inner lip 4 and the bearing inner ring sealing groove inclined surface 1 are mutually abutted, and the sealing ring inner lip 4 and the bearing inner ring sealing groove rib 2 are mutually abutted;

[0023] The length of the horizontal connection between the roots of the inner lip 4 and the outer lip 5 of the sealing ring is A, and the length of the horizontal connection between the bottom roots of the inclined surface 1 of the inner ring sealing groove of the bearing and the rib 2 of the inner ring sealing groove of the bearing is B;

[0024] A is greater than B, but not greater than 2B.

[0025] In this embodiment, preferably, the inner lip 4 of the sealing ring is in a quadrilateral shape. After the sealing ring is installed, the inner lip 4 of the sealing ring is completely fitted with the inclined surface 1 of the sealing groove of the inner ring of the bearing.

[0026] In this embodiment, preferably, after the sealing ring is installed, a sharp corner is provided at the bottom of the inner lip 4 of the sealing ring to abut against the angle of the bottom surface of the inclined surface 1 of the sealing groove of the inner ring of the bearing.

[0027] The above structure can ensure that after the sealing ring is installed, the inner lip and the inclined surface of the inner ring sealing groove are completely fitted together, and no gap is generated at the bottom, thereby ensuring a beneficial sealing effect.

[0028] In this embodiment, preferably, the length of the inner lip 4 of the sealing ring close to the inclined surface 1 of the inner ring sealing groove of the bearing is not greater than the length of the inclined surface 1 of the inner ring sealing groove of the bearing, and is not less than 70% of the length of the inclined surface 1 of the inner ring sealing groove of the bearing.

[0029] In this embodiment, preferably, the length of the inner lip 4 of the sealing ring close to the inclined surface 1 of the bearing inner ring sealing groove is consistent with the length of the inclined surface 1 of the bearing inner ring sealing groove.

[0030] The above-mentioned size limit is set to increase the contact amount between the lip and the sealing groove, and also to further ensure that the inner lip edge 4 of the sealing ring can achieve a complete fit with the inclined surface 1 of the sealing groove of the inner ring of the bearing.

[0031] In this embodiment, preferably, the width of the bottom of the inner lip 4 of the sealing ring is not greater than B.

[0032] Setting the above-mentioned size limit also ensures that the shapes of the inner and outer lips are not affected by each other after the sealing ring is installed, and are in a mutually independent state, which will not affect the sealing effect.

[0033] In this embodiment, preferably, the outer lip 5 of the sealing ring is interference fit with the sealing groove rib 2 of the bearing inner ring.

[0034] The above structure is also provided to achieve the purpose of sufficient interference contact between the outer lip of the sealing ring and the rib, thereby increasing the contact amount between the lip and the sealing groove and improving the sealing effect.

[0035] During use, on the one hand, the width "A" and depth of the middle groove of the inner and outer lips of the sealing ring are increased, so that the inner and outer lips are relatively independent, and the elasticity of the sealing ring lips is increased, which is convenient for increasing the contact amount between the lips and the sealing groove and improving the sealing effect;

[0036] On the other hand, after the seal ring is installed, the shapes of the inner and outer lips are not affected by each other, and the inner and outer lips are in full interference contact with the bevel edge and rib of the bearing seal groove respectively;

[0037] In addition, after the sealing ring is installed, the inner lip is completely fitted with the inclined surface of the inner ring sealing groove, and the outer lip is interference fit with the sealing groove rib, resulting in an excellent sealing effect.

[0038] The above embodiments are merely illustrative of the principles and effects of this patent application and are not intended to limit this patent application. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of this patent application. Therefore, all equivalent modifications or alterations made by persons of ordinary skill in the art without departing from the spirit and technical concepts disclosed in this patent application shall be covered by the claims of this patent application.

Claims

1. A double-lip sealing structure, characterized in that: Including the bevel of the bearing inner ring seal groove (1), a bearing inner ring sealing groove rib (2) and a sealing ring, wherein the sealing ring is clamped between the bearing inner ring sealing groove inclined surface (1) and the bearing inner ring sealing groove rib (2), the sealing ring comprises a sealing ring body (3), a sealing ring inner lip (4) and a sealing ring outer lip (5), the sealing ring inner lip (4) and the sealing ring outer lip (5) are respectively arranged at the upper and lower ends of the outer side surface of the sealing ring body (3), the sealing ring inner lip (4) and the bearing inner ring sealing groove inclined surface (1) are mutually abutted, and the sealing ring outer lip (5) and the bearing inner ring sealing groove rib (2) are mutually abutted; The length of the horizontal connection end of the roots of the inner lip edge (4) of the sealing ring and the outer lip edge (5) of the sealing ring is A, and the length of the horizontal connection end of the bottom root of the inclined surface (1) of the bearing inner ring sealing groove and the rib (2) of the bearing inner ring sealing groove is B; A is greater than B, but not greater than 2B; The inner lip edge (4) of the sealing ring is in a quadrilateral shape, and after the sealing ring is installed, the inner lip edge (4) of the sealing ring is completely fitted with the inclined surface (1) of the sealing groove of the inner ring of the bearing; After the sealing ring is installed, a sharp corner is provided at the bottom of the inner lip edge (4) of the sealing ring to abut against the angle of the bottom surface of the inclined surface (1) of the sealing groove of the inner ring of the bearing; The length of the inner lip edge (4) of the sealing ring close to the inclined surface (1) of the inner ring sealing groove of the bearing is not greater than the length of the inclined surface (1) of the inner ring sealing groove of the bearing, and is not less than 70% of the length of the inclined surface (1) of the inner ring sealing groove of the bearing; The length of the inner lip edge (4) of the sealing ring close to the inclined surface (1) of the bearing inner ring sealing groove is consistent with the length of the inclined surface (1) of the bearing inner ring sealing groove; The width of the bottom of the inner lip (4) of the sealing ring is not greater than B; The outer lip edge (5) of the sealing ring is interference-fitted with the sealing groove rib (2) of the bearing inner ring.

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