Low-friction waterproof seal

Abstract

The utility model discloses a low friction force waterproof seal in the technical field of sealing oil seals, which comprises a metal framework, an outer side sealing body and an inner side sealing body, the outer side sealing body is wrapped between a circle of the outer side of the metal framework and a right side wall, the inner side sealing body is wrapped on a circle of the inner side of the metal framework, and the inner side sealing body is arranged between the outer side of the metal framework and the right side wall. A first sealing lip is arranged on the periphery of the left side of the inner side wall of the inner side sealing body, a second sealing lip is arranged on the periphery of the right side of the inner side wall of the inner side sealing body, a first mounting groove is formed in the periphery of the left side of the outer side wall of the inner side sealing body, and a second mounting groove is formed in the periphery of the right side of the outer side wall of the inner side sealing body. The oil seal is reasonable in structural design, the sealing performance of the oil seal can be improved, meanwhile, the contact area between the oil seal and a motor shaft is reduced, friction is reduced, and the service life of the oil seal is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing oil seals, in particular to a low-friction waterproof seal. Background Art

[0002] Oil seal is the customary name for general seals. Simply put, it is a seal for lubricating oil. It is a mechanical component used to seal grease. It isolates the parts that need lubrication in the transmission components from the output components to prevent the lubricating oil from leaking. The connection between the motor housing and the motor shaft needs an oil seal for sealing and waterproofing.

[0003] In order to improve the sealing between the oil seal and the motor shaft, the existing oil seal usually increases the contact area between the oil seal and the motor shaft to improve the sealing. However, when the motor shaft rotates at high speed, the large area of ​​contact and friction with the oil seal will lead to a reduction in the service life of the oil seal. For this reason, we propose a low-friction waterproof seal. Utility Model Content

[0004] The utility model aims to provide a low-friction waterproof seal to solve the problem in the background art that the motor shaft rubs against the oil seal over a large area under high-speed rotation, which may reduce the service life of the oil seal.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a low-friction waterproof seal, comprising a metal frame, an outer sealing body and an inner sealing body, the outer sealing body is wrapped around the outer side of the metal frame and the right side wall, the inner sealing body is wrapped around the inner side of the metal frame, a first sealing lip is provided around the left side of the inner wall of the inner sealing body, a second sealing lip is provided around the right side of the inner wall of the inner sealing body, a first installation groove is opened around the left side of the outer wall of the inner sealing body, and a second installation groove is opened around the right side of the outer wall of the inner sealing body.

[0006] As a further description of the above technical solution:

[0007] The outer sealing body, the inner sealing body, the first sealing lip and the second sealing lip are an integrally formed structure.

[0008] As a further description of the above technical solution:

[0009] A left chamfer is formed on the left side of the outer wall of the outer sealing body, and a right chamfer is formed on the right side of the outer wall of the outer sealing body.

[0010] As a further description of the above technical solution:

[0011] The outer sealing body, the inner sealing body, the first sealing lip and the second sealing lip are all made of nitrile rubber.

[0012] As a further description of the above technical solution:

[0013] The inner diameters of the first sealing lip and the second sealing lip are equal, and a 45-degree chamfer is provided around the left wall of the first sealing lip and around the right wall of the second sealing lip.

[0014] As a further description of the above technical solution:

[0015] The inner cavity of the first installation groove is clamped with a first spring, and the inner cavity of the second installation groove is clamped with a second spring.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows: the low-friction waterproof seal supports the integrally formed outer sealing body and inner sealing body through a metal skeleton, and a first sealing lip and a second sealing lip are arranged on the inner side of the inner sealing body, and the first sealing lip on the inner sealing body is contacted and sealed with the motor shaft sleeve by installing the first spring in the first mounting groove, and the second sealing lip on the inner sealing body is contacted and sealed with the motor shaft sleeve by installing the second spring in the second mounting groove, thereby forming a two-layer seal and reducing the contact area between the oil seal and the motor shaft, thereby improving the sealing performance of the oil seal and also reducing the contact area between the oil seal and the motor shaft, reducing friction, and increasing the service life of the oil seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a low-friction waterproof seal proposed by the utility model;

[0018] Figure 2 This is a schematic diagram of the main cross-sectional structure of a low-friction waterproof seal proposed by the utility model;

[0019] Figure 3 A low friction waterproof seal proposed by the utility model Figure 2 Enlarged structural diagram at A in the middle.

[0020] In the figure: 100, metal frame; 200, outer sealing body; 210, left chamfer; 220, right chamfer; 300, inner sealing body; 310, first sealing lip; 320, second sealing lip; 330, first mounting groove; 331, first spring; 340, second mounting groove; 341, second spring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] The utility model provides a low friction waterproof seal, reduces friction and increases the service life of the oil seal. Figure 1-3 , comprising a metal frame 100, an outer sealing body 200 and an inner sealing body 300;

[0025] Please refer again Figure 1-3 The metal frame 100 is used to install the outer sealing body 200 and the inner sealing body 300. The metal frame 100, the outer sealing body 200 and the inner sealing body 300 are an integral vulcanization molding structure;

[0026] Please refer again Figure 1-3The outer sealing body 200, the inner sealing body 300, the first sealing lip 310 and the second sealing lip 320 are an integrally formed structure. A left chamfer 210 is provided on the left side of the outer wall of the outer sealing body 200, and a right chamfer 220 is provided on the right side of the outer wall of the outer sealing body 200. The outer sealing body 200, the inner sealing body 300, the first sealing lip 310 and the second sealing lip 320 are all made of nitrile rubber. The outer sealing body 200 is wrapped between the outer side of the metal frame 100 and the right side wall.

[0027] Please refer again Figure 1-3 A first sealing lip 310 is provided on the left side of the inner wall of the inner sealing body 300, a second sealing lip 320 is provided on the right side of the inner wall of the inner sealing body 300, a first mounting groove 330 is opened on the left side of the outer wall of the inner sealing body 300, and a second mounting groove 340 is opened on the right side of the outer wall of the inner sealing body 300. The inner diameters of the first sealing lip 310 and the second sealing lip 320 are equal. A forty-five-degree chamfer is provided on the left side wall of the first sealing lip 310 and the right side wall of the second sealing lip 320. The inner cavity of the first mounting groove 330 is clamped with a first spring 331, and the inner cavity of the second mounting groove 340 is clamped with a second spring 341. The body 300 is wrapped around the inner side of the metal skeleton 100, and the metal skeleton 100 supports the integrally formed outer sealing body 200 and inner sealing body 300. At the same time, a first sealing lip 310 and a second sealing lip 320 are arranged on the inner side of the inner sealing body 300. The first spring 331 in the first mounting groove 330 is installed to make the first sealing lip 310 on the inner sealing body 300 contact and seal with the motor shaft sleeve. At the same time, the second spring 341 in the second mounting groove 340 is installed to make the second sealing lip 320 on the inner sealing body 300 contact and seal with the motor shaft sleeve, forming a two-layer seal and reducing the contact area between the oil seal and the motor shaft.

[0028] In summary, while improving the sealing performance of the oil seal, it also reduces the contact area between the oil seal and the motor shaft, reduces friction, and increases the service life of the oil seal.

[0029] During specific use, when installing the motor oil seal, a person skilled in the art passes the oil seal through the motor shaft. Under the support of the metal skeleton 100, the first spring 331 in the first mounting groove 330 is installed so that the first sealing lip 310 on the inner sealing body 300 contacts and seals with the motor shaft sleeve. At the same time, the second spring 341 in the second mounting groove 340 is installed so that the second sealing lip 320 on the inner sealing body 300 contacts and seals with the motor shaft sleeve, forming a two-layer seal. Finally, the left chamfer 210 and the right chamfer 220 on the outer sealing body 200 form a mounting portion on the outside of the outer sealing body 200 that can be snap-fitted with the motor housing for installation on the motor housing.

[0030] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0031] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A low friction waterproof seal, characterized in that: The invention comprises a metal frame (100), an outer sealing body (200) and an inner sealing body (300), wherein the outer sealing body (200) is wrapped around the outer side of the metal frame (100) and the right side wall, and the inner sealing body (300) is wrapped around the inner side of the metal frame (100). A first sealing lip (310) is provided around the left side of the inner wall of the inner sealing body (300), and a second sealing lip (320) is provided around the right side of the inner wall of the inner sealing body (300). A first mounting groove (330) is opened around the left side of the outer wall of the inner sealing body (300), and a second mounting groove (340) is opened around the right side of the outer wall of the inner sealing body (300).

2. A low friction waterproof seal according to claim 1, characterized in that: The outer sealing body (200), the inner sealing body (300), the first sealing lip (310) and the second sealing lip (320) are an integrally formed structure.

3. A low friction waterproof seal according to claim 1, characterized in that: A left chamfer (210) is formed around the left side of the outer wall of the outer sealing body (200), and a right chamfer (220) is formed around the right side of the outer wall of the outer sealing body (200).

4. A low friction waterproof seal according to claim 1, characterized in that: The outer sealing body (200), the inner sealing body (300), the first sealing lip (310) and the second sealing lip (320) are all made of nitrile rubber.

5. A low friction waterproof seal according to claim 1, characterized in that: The inner diameters of the first sealing lip (310) and the second sealing lip (320) are equal, and a 45-degree chamfer is provided around the left wall of the first sealing lip (310) and around the right wall of the second sealing lip (320).

6. A low friction waterproof seal according to claim 1, characterized in that: The inner cavity of the first installation groove (330) is clamped with a first spring (331), and the inner cavity of the second installation groove (340) is clamped with a second spring (341).

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