Self-lubricating oil seal for preventing silt

Abstract

The application relates to a self-lubricating oil seal for preventing silt, and relates to the technical field of oil seal technology, and comprises a rubber main body, the inner side of the rubber main body is provided with a gap notch, and a sealing lip is fixed on the inner edge of the side of the rubber main body away from the gap notch; a limiting spring is arranged on the side of the rubber main body, and a limiting ring groove is arranged on the side of the sealing lip close to the gap notch and used for sleeving and arranging the limiting spring; when a vehicle runs on a rugged mountain road, the limiting spring continuously and stably applies elastic pressure to the sealing lip through the limiting ring groove, so that the sealing lip can always keep a close contact state, impurities such as silt and dust are effectively blocked from invading the inside of equipment, and the service life of the oil seal is prolonged.

Description

Technical Field

[0001] This application relates to the technical field of oil seal technology, and in particular to a self-lubricating oil seal for preventing mud and sand. Background Technology

[0002] Currently, in the field of mechanical seals, oil seals are widely used as key components in various vehicles and industrial equipment. Their core function is to prevent lubricating oil leakage and prevent external impurities from entering the equipment, thus ensuring stable operation and service life. With the increasing diversification of vehicle usage scenarios, especially off-road vehicles and engineering vehicles operating in complex road conditions, more stringent requirements are placed on the performance of oil seals. Under harsh driving conditions such as rugged mountain roads, oil seals need to have stronger adaptability and sealing reliability.

[0003] In related technologies, a self-lubricating oil seal includes a rubber body, wherein a clearance notch is provided on the inner side of the rubber body. This design aims to optimize the assembly and motion coordination between the oil seal and the rotating shaft. At the same time, a sealing lip is firmly provided on the inner edge of the side of the rubber body away from the clearance notch. It directly contacts the rotating shaft to form a dynamic sealing interface. Relying on its own elasticity and lubrication characteristics, it achieves an effective sealing function and reduces the risk of lubricating oil leakage.

[0004] In the aforementioned technologies, when a vehicle travels on rugged mountain roads, the severe vibration of the vehicle body causes irregular axial and radial runout of the rotating shaft. Because the pressure distribution of the sealing lip is difficult to adjust in real time with the dynamic changes of the shaft, intermittent separation occurs between the sealing lip and the rotating shaft, forming a tiny gap. This makes it easy for impurities such as mud and dust to enter the equipment, which not only accelerates the wear of the oil seal itself and shortens its service life, but may also damage the precision parts inside the equipment, affecting the overall vehicle performance. There is room for improvement. Summary of the Invention

[0005] The purpose of this application is to provide a self-lubricating oil seal for preventing mud and sand, thereby solving the problem in the above-mentioned related technologies that the sealing lip cannot tightly fit the rotating shaft when the vehicle is traveling on rugged mountain roads, resulting in the intrusion of impurities such as mud and dust into the equipment.

[0006] The self-lubricating oil seal for preventing mud and sand provided in this application adopts the following technical solution: A self-lubricating oil seal for preventing mud and sand includes a rubber body, a clearance notch is provided on the inner side of the rubber body, and a sealing lip is fixed on the inner edge of the side of the rubber body away from the clearance notch; a limiting spring is provided on the side of the rubber body, and a limiting ring groove is provided on the side of the sealing lip near the clearance notch for the limiting spring to be sleeved and inserted.

[0007] By adopting the above technical solution, when the vehicle is traveling on a rugged mountain road, the limiting spring applies continuous and stable elastic pressure to the sealing lip through the limiting ring groove, so that it can adapt to the axial / radial runout of the rotating shaft in real time and always maintain a tight fit. This design effectively eliminates the problem of intermittent separation between the sealing lip and the rotating shaft caused by vibration, forming a reliable dynamic sealing barrier that can prevent lubricating oil leakage and block impurities such as mud and dust from entering the equipment, thereby extending the service life of the oil seal.

[0008] Optionally, a plurality of anti-slip textures are fixed on the inner wall of the clearance notch.

[0009] By adopting the above technical solution, when the vehicle is driving on a bumpy road, the violent jumping of the rotating shaft can easily cause the oil seal to shift relative to the ground. The anti-slip texture can effectively suppress this axial or circumferential sliding tendency by increasing the friction of the contact surface, ensuring that the rubber body and the rotating shaft move synchronously.

[0010] Optionally, a protective ring is fitted around the outside of the rubber body, and a fixing notch is provided on the inner side of the protective ring for the rubber body to be inserted. A fixing component is provided on the rubber body, and the rubber body and the protective ring are detachably connected through the fixing component.

[0011] By adopting the above technical solution, the fixed notch of the protective ring and the rubber body form a mechanically interlocking structure, which can effectively disperse external impact force and prevent the rubber body from deforming or cracking due to direct pressure. It is especially suitable for harsh working conditions such as mud and sand splashing and stone impact.

[0012] Optionally, the fixing member is a fixing ring strip fixed on the outer side of the rubber body, and the inner side of the protective ring is provided with a fixing ring groove for the fixing ring strip to be inserted; the fixing ring strip can be inserted into the fixing ring groove when the protective ring is sleeved on the outer peripheral surface of the rubber body.

[0013] By adopting the above technical solution, when the protective ring is fitted onto the rubber body, the fixing ring is precisely embedded in the fixing ring groove to form a snap-fit ​​locking structure. This effectively restricts the axial movement and circumferential rotation of the protective ring, preventing it from falling off under equipment vibration or mud and sand impact. Furthermore, the inclusive design of the ring groove disperses local stress, preventing the rubber body from cracking due to concentrated stress.

[0014] Optionally, the side edge of the fixing ring is chamfered.

[0015] By adopting the above technical solution, the chamfer design plays a guiding role in the installation of the protective ring, allowing the fixing ring to slide smoothly into the fixing ring groove, avoiding jamming or scratches on the surface of the rubber body caused by sharp edges, thereby improving assembly efficiency and reducing the risk of component damage.

[0016] Optionally, the inner wall of the limiting ring groove is a guide arc surface.

[0017] By adopting the above technical solution, the guide arc surface plays a key guiding role when installing the spring. During the process of inserting the spring into the limiting ring groove, the arc surface can accurately guide the spring to be positioned along the predetermined trajectory, avoiding the spring from being skewed or stuck during installation, greatly improving installation efficiency and accuracy, and reducing the problem of spring performance damage caused by improper installation.

[0018] Optionally, an elastic element is fixedly provided on the inner wall of the fixing notch, and a plurality of positioning grooves are fixedly provided on the outer peripheral surface of the rubber body; the elastic element can be engaged in the positioning groove after the fixing ring is engaged in the fixing ring groove.

[0019] By adopting the above technical solution, when the fixed ring is inserted into the fixed ring groove, the elastic element is simultaneously embedded in the positioning groove, forming a double mechanical constraint; the elastic deformation force of the elastic element can effectively compensate for the assembly tolerance, ensuring that the protective ring and the rubber body are in a gap-free fit in both the axial and circumferential directions, while the elastic pre-tightening force continuously counteracts the loosening of the connection caused by equipment vibration.

[0020] Optionally, a support groove is provided on the inner wall of the fixed notch for inserting an elastic element. The elastic element includes a positioning protrusion and a positioning spring. One end of the positioning spring presses one side of the positioning protrusion so that a part of the positioning protrusion protrudes out of the opening of the support groove. The protruding part of the positioning protrusion is an arc surface, and the arc length corresponding to the arc surface of the protruding part is a minor arc.

[0021] By adopting the above technical solution, the support groove provides a precise installation space for the elastic element, and the positioning spring continuously squeezes the positioning protrusion, so that the arc-shaped protrusion is tightly embedded in the positioning groove of the rubber body, forming a stable fitting structure. This design not only effectively prevents the protective ring from loosening under vibration or impact through uniform pressure distribution, but also dynamically compensates for the gap caused by temperature changes or component deformation, ensuring long-term locking.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. When the vehicle is traveling on a rugged mountain road, the limiting spring applies continuous and stable elastic pressure to the sealing lip through the limiting ring groove, so that it can adapt to the axial / radial runout of the rotating shaft in real time and always maintain a tight fit. This design effectively eliminates the problem of intermittent separation between the sealing lip and the rotating shaft caused by vibration, forming a reliable dynamic sealing barrier. It can not only prevent lubricating oil leakage, but also completely block impurities such as mud and dust from entering the equipment, thereby extending the service life of the oil seal. 2. When the fixed ring is inserted into the fixed ring groove, the elastic element is simultaneously embedded into the positioning groove, forming a double mechanical constraint; the elastic deformation force of the elastic element can effectively compensate for the assembly tolerance, ensuring that the protective ring and the rubber body are in a gap-free fit in both the axial and circumferential directions, while the elastic pre-tightening force continuously counteracts the loosening of the connection caused by equipment vibration. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram illustrating the overall structure of the sealing lip and the rubber body in the embodiment of this application. Figure 2 This is a cross-sectional structural diagram illustrating the installation and cooperation of the limiting spring and the sealing lip in an embodiment of this application; Figure 3 yes Figure 2 A magnified view of part A in the middle; Figure 4 This is a cross-sectional structural diagram illustrating the installation and fit of the anti-slip texture and the clearance notch in an embodiment of this application; Figure 5 This is a schematic diagram illustrating the overall structure of the protective ring and sealing lip installation and mating in an embodiment of this application; Figure 6 This is an exploded structural diagram illustrating the installation and cooperation of the protective ring and the rubber body in an embodiment of this application; Figure 7 This is a cross-sectional structural diagram illustrating the installation and cooperation of the fixing ring and the protective ring in an embodiment of this application; Figure 8 This is a cross-sectional structural diagram illustrating the installation and cooperation of the protective ring and the elastic element in an embodiment of this application; Figure 9 yes Figure 8 A magnified view of part B in the diagram.

[0025] In the diagram, 1. Rubber body; 11. Relief notch; 111. Anti-slip texture; 12. Positioning groove; 2. Sealing lip; 21. Limiting ring groove; 211. Guide arc surface; 3. Limiting spring; 4. Protective ring; 41. Fixing notch; 411. Support groove; 42. Fixing ring groove; 5. Fixing component; 51. Fixing ring strip; 511. Chamfer; 6. Elastic component; 61. Positioning protrusion; 62. Positioning spring. Detailed Implementation

[0026] The present application will be further described in detail below with reference to all the accompanying drawings.

[0027] Example: Reference Figure 1 , Figure 2 and Figure 3 A self-lubricating oil seal for preventing mud and sand includes a rubber body 1, wherein a clearance notch 11 is provided on the inner side of the rubber body 1, and a sealing lip 2 is integrally formed on the inner edge of the side of the rubber body 1 away from the clearance notch 11; a limit spring 3 is provided on the side of the rubber body 1, and a limit ring groove 21 is provided on the side of the sealing lip 2 near the clearance notch 11 for the limit spring 3 to be sleeved and inserted; when the vehicle travels on a rugged mountain road, the limit spring 3 can apply appropriate pressure to the sealing lip 2 through the limit ring groove 21, so that the sealing lip 2 always fits tightly against the rotating shaft, effectively preventing mud and sand and other impurities from entering the equipment and ensuring the normal operation of the equipment.

[0028] Reference Figure 3 The inner wall of the limiting ring groove 21 is a guide arc surface 211; when the limiting spring 3 is placed into the limiting ring groove 21, the arc surface can accurately guide the spring to be positioned along the predetermined trajectory, avoiding the spring from being skewed or stuck during installation.

[0029] Reference Figure 4 The inner wall of the clearance 11 is integrally formed with several anti-slip textures 111; the anti-slip textures 111 ensure that the oil seal and the rotating shaft will not be displaced relative to each other due to severe vibration.

[0030] Reference Figure 5 , Figure 6 and Figure 7 The rubber body 1 is fitted with a protective ring 4 on its outside. The inner side of the protective ring 4 has a fixing notch 41 for the rubber body 1 to be inserted. The rubber body 1 is provided with a fixing member 5, and the rubber body 1 and the protective ring 4 are detachably connected through the fixing member 5. The protective ring 4 makes the rubber body 1 more durable and the structure more stable. The detachable connection method facilitates the installation, disassembly and maintenance during the use of the oil seal, and the protective ring 4 or the rubber body 1 can be flexibly replaced according to the actual use.

[0031] Reference Figure 7 The fixing member 5 is a fixing ring 51 integrally formed on the outer side of the rubber body 1. The side edge of the fixing ring 51 is chamfered 511, and the inner side of the protective ring 4 is provided with a fixing ring groove 42 for the fixing ring 51 to be inserted. When the protective ring 4 is fitted on the outer circumference of the rubber body 1, the fixing ring 51 can be smoothly inserted into the fixing ring groove 42 by means of the chamfered design, which effectively prevents the protective ring 4 from sliding or falling off on the rubber body 1, and ensures that the rubber body 1 can maintain the stability of the structure and the reliability of the seal under various complex working conditions.

[0032] Reference Figure 7 , Figure 8 and Figure 9 An elastic element 6 is fixedly installed on the inner wall of the fixed notch 41, and several positioning grooves 12 are fixed on the outer peripheral surface of the rubber body 1; a support groove 411 for inserting the elastic element 6 is opened on the inner wall of the fixed notch 41, and the elastic element 6 includes a positioning protrusion 61 and a positioning spring 62; one end of the positioning spring 62 presses one side of the positioning protrusion 61 so that a part of the positioning protrusion 61 protrudes out of the opening of the support groove 411, and the protruding part of the positioning protrusion 61 is an arc surface, and the arc length corresponding to the arc surface of the protruding part is a minor arc; During actual assembly, when the fixing ring 51 is engaged in the fixing ring groove 42, the protruding part of the positioning protrusion 61 can be accurately and stably engaged in the positioning groove 12 on the outer circumferential surface of the rubber body 1, forming a further stable connection between the protective ring 4 and the rubber body 1.

[0033] The implementation principle of this application embodiment is as follows: When in complex working conditions such as rugged mountain roads, the limiting spring 3 located on the side of the sealing lip 2 is in close cooperation with the limiting ring groove 21. The limiting spring 3, with its own elasticity, continuously and stably applies appropriate pressure to the sealing lip 2, so that the sealing lip 2 always fits tightly against the rotating shaft and blocks impurities such as mud and sand from entering the equipment, effectively ensuring the stable operation of the equipment under complex working conditions.

[0034] Unless otherwise defined, the terms or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar words used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "a" or "one," and similar words do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising," "including," and similar words mean that the element or object preceding "comprising" encompasses the element or object listed following "comprising" or "including," and their equivalents, but do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0035] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A self-lubricating oil seal for preventing mud and sand, comprising a rubber body (1), wherein a clearance notch (11) is provided on the inner side of the rubber body (1), and a sealing lip (2) is fixedly provided on the inner edge of the side of the rubber body (1) away from the clearance notch (11); characterized in that, The side of the rubber body (1) is provided with a limiting spring (3), and the sealing lip (2) is provided with a limiting ring groove (21) on the side near the clearance notch (11) for the limiting spring (3) to be sleeved and inserted.

2. The self-lubricating oil seal for preventing mud and sand according to claim 1, characterized in that, The inner wall of the clearance notch (11) is provided with a number of anti-slip textures (111).

3. A self-lubricating oil seal for preventing mud and sand accumulation according to claim 1, characterized in that, The inner wall of the limiting annular groove (21) is a guide arc surface (211).

4. A self-lubricating oil seal for preventing mud and sand accumulation according to claim 1, characterized in that, The rubber body (1) is fitted with a protective ring (4) on its outside. The inner side of the protective ring (4) is provided with a fixing notch (41) for the rubber body (1) to be inserted. The rubber body (1) is provided with a fixing member (5). The rubber body (1) and the protective ring (4) are detachably connected by the fixing member (5).

5. A self-lubricating oil seal for preventing mud and sand accumulation according to claim 4, characterized in that, The fixing member (5) is a fixing ring (51) fixed on the outer side of the rubber body (1). The inner side of the protective ring (4) is provided with a fixing ring groove (42) for the fixing ring (51) to be inserted. The fixing ring (51) can be inserted into the fixing ring groove (42) when the protective ring (4) is sleeved on the outer circumferential surface of the rubber body (1).

6. A self-lubricating oil seal for preventing mud and sand accumulation according to claim 5, characterized in that, The side edge of the fixing ring (51) is chamfered (511).

7. A self-lubricating oil seal for preventing mud and sand accumulation according to claim 5, characterized in that, An elastic element (6) is fixed on the inner wall of the fixed notch (41), and a plurality of positioning grooves (12) are fixed on the outer circumferential surface of the rubber body (1); the elastic element (6) can be inserted into the positioning groove (12) after the fixed ring (51) is inserted into the fixed ring groove (42).

8. A self-lubricating oil seal for preventing mud and sand accumulation according to claim 7, characterized in that, The inner wall of the fixed notch (41) is provided with a support groove (411) for inserting the elastic element (6). The elastic element (6) includes a positioning protrusion (61) and a positioning spring (62). One end of the positioning spring (62) presses one side of the positioning protrusion (61) so that a part of the positioning protrusion (61) protrudes out of the opening of the support groove (411). The protruding part of the positioning protrusion (61) is an arc surface, and the arc length corresponding to the arc surface of the protruding part is a minor arc.

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