阅读说明：本技术 一种金属密封环的定位结构 (Positioning structure of metal sealing ring ) 是由 侯瑞昌 陈武 邱模强 李涛 于 2020-07-27 设计创作，主要内容包括：本发明涉及密封技术领域,尤其涉及一种金属密封环的定位结构,其包括金属密封环,套设在转轴上,且夹设于轴承的内圈与所述转轴的轴肩之间,所述金属密封环的外边缘与所述轴承的外圈抵接；弹性定位环,设置在所述金属密封环的内环面上,且所述弹性定位环的内环面与所述转轴上的退刀槽的槽底抵接。本发明无需设置定距环即可对金属密封环进行定位。(The invention relates to the technical field of sealing, in particular to a positioning structure of a metal sealing ring, which comprises the metal sealing ring, wherein the metal sealing ring is sleeved on a rotating shaft and clamped between an inner ring of a bearing and a shaft shoulder of the rotating shaft, and the outer edge of the metal sealing ring is abutted against an outer ring of the bearing; and the elastic positioning ring is arranged on the inner ring surface of the metal sealing ring, and the inner ring surface of the elastic positioning ring is abutted with the groove bottom of the tool withdrawal groove in the rotating shaft. The invention can position the metal sealing ring without arranging a distance ring.)

1. A positioning structure of a metal seal ring, comprising:

the metal sealing ring (30) is sleeved on the rotating shaft (10) and clamped between an inner ring (21) of the bearing (20) and a shaft shoulder (12) of the rotating shaft (10), and the outer edge of the metal sealing ring (30) is abutted to an outer ring (22) of the bearing (20);

and the elastic positioning ring (40) is arranged on the inner ring surface of the metal sealing ring (30), and the inner ring surface of the elastic positioning ring (40) is abutted against the groove bottom of the tool withdrawal groove (11) in the rotating shaft (10).

2. The positioning structure of a metal sealing ring according to claim 1, wherein the metal sealing ring (30) includes a first positioning portion (31), a connecting portion (32) and a second positioning portion (33) which are coaxially and sequentially connected, the first positioning portion (31) is interposed between an inner ring (21) of the bearing (20) and a shoulder (12) of the rotating shaft (10), an edge of the second positioning portion (33) abuts against an outer ring (22) of the bearing (20), and the elastic positioning ring (40) is disposed on the first positioning portion (31).

3. The positioning structure of a metal sealing ring as claimed in claim 2, wherein the inner annular surface of the first positioning portion (31) defines an annular positioning groove, and the elastic positioning ring (40) is disposed in the positioning groove and has one end protruding relative to the positioning groove.

4. The structure of claim 1, wherein the elastic positioning ring (40) is integrated with the metal seal ring (30).

5. The structure of claim 4, wherein the elastic positioning ring (40) is integrally formed with the metal seal ring (30) by a vulcanization process.

6. The positioning structure of the metal sealing ring as claimed in claim 4, wherein the elastic positioning ring (40) is bonded with the metal sealing ring (30) as a unitary structure.

7. The positioning structure of metal sealing ring according to claim 1, wherein the elastic positioning ring (40) is made of rubber or silicone.

8. A positioning structure of a metal seal ring according to claim 1, characterized in that the surface of the metal seal ring (30) is provided with an anti-corrosion layer.

9. The positioning structure of a metal seal ring according to claim 8, wherein said corrosion prevention layer is paint.

10. The positioning structure of a metal sealing ring according to claim 1, wherein the material of the metal sealing ring (30) is aluminum alloy or galvanized steel.

Technical Field

The invention relates to the technical field of sealing, in particular to a positioning structure of a metal sealing ring.

Background

Disclosure of Invention

The invention aims to provide a positioning structure of a metal sealing ring, which can position the metal sealing ring without arranging a distance ring.

In order to achieve the purpose, the invention adopts the following technical scheme:

a positioning structure of a metal seal ring, comprising:

the metal sealing ring is sleeved on the rotating shaft and clamped between an inner ring of the bearing and a shaft shoulder of the rotating shaft, and the outer edge of the metal sealing ring is abutted against an outer ring of the bearing;

and the elastic positioning ring is arranged on the inner ring surface of the metal sealing ring, and the inner ring surface of the elastic positioning ring is abutted with the groove bottom of the tool withdrawal groove in the rotating shaft.

Optionally, the metal sealing ring includes a first positioning portion, a connecting portion, and a second positioning portion that are coaxially connected in sequence, the first positioning portion is clamped between an inner ring of the bearing and a shaft shoulder of the rotating shaft, an edge of the second positioning portion abuts against an outer ring of the bearing, and the elastic positioning ring is disposed on the first positioning portion.

Optionally, an annular positioning groove is formed in an inner annular surface of the first positioning portion, the elastic positioning ring is disposed in the positioning groove, and one end of the elastic positioning ring protrudes relative to the positioning groove.

Optionally, the elastic positioning ring and the metal sealing ring are of an integrated structure.

Optionally, the elastic positioning ring and the metal sealing ring are integrally formed through a vulcanization process.

Optionally, the elastic positioning ring and the metal sealing ring are bonded into an integrated structure.

Optionally, the elastic positioning ring is made of rubber or silica gel.

Optionally, a surface of the metal seal ring is provided with a corrosion protection layer.

Optionally, the corrosion protection layer is a paint.

Optionally, the metal sealing ring is made of aluminum alloy or galvanized steel.

The invention has the beneficial effects that:

according to the positioning structure of the metal sealing ring, the metal sealing ring is sleeved on the rotating shaft, the elastic positioning ring is arranged on the inner ring surface of the metal sealing ring and is abutted against the bottom of the tool withdrawal groove, when the positioning structure is installed, the elastic positioning ring is abutted against and deformed with the tool withdrawal groove, the side surface of the inner ring of the bearing compresses the metal sealing ring, and the deformation force of the elastic positioning ring is uniformly distributed, so that the metal sealing ring can be automatically positioned. Therefore, when the metal sealing ring is installed, a distance ring is not required to be arranged, the specification of parts is reduced, the management is easy, and the material cost and the management cost are reduced; meanwhile, the span of force action points between the two bearings cannot be increased, the length of the rotating shaft does not need to be increased, and the condition that the gear teeth at the output gear end are meshed in the gear direction and are not evenly loaded is effectively prevented.

Drawings

FIG. 1 is a cross-sectional view of a prior art positioning structure for a metal seal ring;

FIG. 2 is a cross-sectional view of a positioning structure of a metal seal ring according to the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

fig. 4 is a partial sectional view of a metal seal ring and an elastic positioning ring in a positioning structure of the metal seal ring according to the present invention.

In fig. 1:

1. a rotating shaft; 2. a distance ring; 3. a metal seal ring; a

In fig. 2-4:

10. a rotating shaft; 11. a tool withdrawal groove; 12. a shaft shoulder; 20. a bearing; 21. an inner ring; 22. an outer ring; 30. a metal seal ring; 31. a first positioning portion; 32. a connecting portion; 33. a second positioning portion; 40. an elastic positioning ring.

Detailed Description

The technical scheme of the invention is further explained by combining the attached drawings and the embodiment. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In order to reduce the disadvantages caused by the distance ring and realize the positioning of the metal sealing ring without arranging the distance ring when the metal sealing ring is used for sealing the bearing, as shown in fig. 2-4, the invention provides a positioning structure of the metal sealing ring, which comprises the following components: the sealing structure comprises a metal sealing ring 30 and an elastic sealing ring, wherein the metal sealing ring 30 is sleeved on the rotating shaft 10 and clamped between an inner ring 21 of the bearing 20 and a shaft shoulder 12 of the rotating shaft 10, and the outer edge of the metal sealing ring 30 is abutted against an outer ring 22 of the bearing 20; the elastic positioning ring 40 is disposed on the inner annular surface of the metal sealing ring 30, and the inner annular surface of the elastic positioning ring 40 abuts against the groove bottom of the tool withdrawal groove 11 on the rotating shaft 10.

The metal sealing ring 30 is sleeved on the rotating shaft 10, so that one side of the bearing 20 facing the shaft shoulder 12 can be sealed, grease in the bearing 20 is prevented from leaking, and dust or other impurities can be prevented from entering the bearing 20.

The elastic positioning ring 40 is arranged on the inner ring surface of the metal sealing ring 30 and is abutted against the groove bottom of the tool withdrawal groove 11, when the metal sealing ring is installed, the elastic positioning ring 40 is abutted against and deformed with the tool withdrawal groove 11, the side surface of the inner ring 21 of the bearing 20 compresses the metal sealing ring 30, and the deformation force of the elastic positioning ring 40 is uniformly distributed, so that the metal sealing ring 30 can be automatically positioned. Therefore, when the metal sealing ring 30 is installed, a distance ring is not required to be arranged, the specification of parts is reduced, the management is easy, and the material cost and the management cost are reduced; meanwhile, the span of the force action points between the two bearings 20 cannot be increased, the length of the rotating shaft 10 does not need to be increased, and the condition that the gear teeth at the output gear end are meshed unevenly is effectively prevented.

Further, the metal seal ring 30 includes a first positioning portion 31, a connecting portion 32 and a second positioning portion 33 coaxially and sequentially connected, the first positioning portion 31 is interposed between the inner ring 21 of the bearing 20 and the shoulder 12 of the rotating shaft 10, an edge of the second positioning portion 33 abuts against the outer ring 22 of the bearing 20, and the elastic positioning ring 40 is disposed on the first positioning portion 31. With the above arrangement, the bearing 20 can be sealed on the side facing the shoulder 12, and impurities such as dust can be prevented from entering the rolling elements through the gap between the outer ring 22 and the inner ring 21 of the bearing 20, thereby causing abrasion to the bearing 20 and shortening the service life of the bearing 20.

Further, an annular positioning groove is formed in an inner annular surface of the first positioning portion 31, the elastic positioning ring 40 is disposed in the positioning groove, and one end of the elastic positioning ring protrudes relative to the positioning groove. Through seting up the constant head tank, be convenient for install elastic positioning ring 40, the relative constant head tank protrusion of one end of elastic sealing ring simultaneously does not influence when the installation, and elastic positioning ring 40 warp with the sword groove 11 butt that moves back to fix a position metal seal ring 30.

In other embodiments, the elastic retaining ring 40 is optionally a unitary structure with the metal seal ring 30. When the metal sealing ring 30 is installed, the elastic positioning ring 40 does not need to be installed, and the step of installing the elastic sealing ring on the metal sealing ring 30 is reduced by designing the elastic positioning ring 40 and the metal sealing ring 30 into an integrated structure, so that the installation process is simplified. And the elastic positioning ring 40 and the metal sealing ring 30 are integrated to ensure the stability of the connection between the elastic positioning ring 40 and the metal sealing ring 30, and prevent the elastic positioning ring 40 from being peeled off from the metal sealing ring 30 due to stress, thereby preventing the failure of parts. Specifically, the elastic positioning ring 40 is made of rubber or silica gel with good mechanical properties, good aging resistance and wear resistance. The elastic positioning ring 40 is integrally formed with the metal seal ring 30 through a vulcanization process.

Further, in other embodiments, the elastic positioning ring 40 and the metal sealing ring 30 may be bonded into a unitary structure. By adopting glue to bond the elastic positioning ring 40 and the metal sealing ring 30, a special vulcanizing device is not needed, and the mode can be used in the occasion that the stress of the metal sealing ring 30 is not too large. Through adopting glue bonding, can reduce manufacturing cost with elastic positioning ring 40 and metal seal ring 30 high-speed joint.

Further, since the metal seal ring 30 is in contact with grease of the bearing 20 for a long time, in order to prevent the metal seal ring 30 from being corroded, in the present embodiment, the surface of the metal seal ring 30 is provided with a corrosion prevention layer. In particular, particularly for applications where the sealing requirements are less stringent, the metal seal ring 30, which is often made of iron, requires an additional corrosion protection layer. Further, the anti-corrosion layer is paint. Grease can be isolated from the metal seal ring 30 by the corrosion prevention layer, thereby protecting the metal seal ring 30. In other embodiments, the surface of the metal sealing ring 30 may be galvanized to prevent corrosion, which is not limited herein.

Further, the material of the metal sealing ring 30 is aluminum alloy, galvanized steel or stainless steel. The working requirements can be met by adopting aluminum alloy, galvanized steel or stainless steel without arranging an anti-corrosion layer. In other embodiments, the metal seal ring 30 may be made of a metal material with good ductility, which is not limited herein.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.