Pressure-resistant structure of corrosion-resistant oil seal

Abstract

The utility model discloses a pressure-resistant structure of a corrosion-resistant oil seal piece, which comprises a shaft piece and a sleeve hole, and further comprises an oil seal ring provided with a lip and a spring, a framework is arranged in the oil seal ring, a batten is movably arranged on the framework, a bulge is arranged on the batten, and a slide way in sliding fit with the bulge is arranged in the sleeve hole. According to the pressure-resistant structure of the corrosion-resistant oil seal piece, the oil seal ring is guided through the protrusions, then the first-circle protrusion is clamped into the first-circle pit close to the end opening of the sliding way, preferential butt joint is achieved, in the process of continuing to press the oil seal ring, the second-circle protrusion is clamped into the first-circle pit, double-circle limiting butt joint is achieved, and the service life of the oil seal ring is prolonged. And the steps are repeated in sequence until the protrusions are clamped into all the pits, so that the oil seal ring is installed more stably from inside to inside, the oil seal ring moves in the cavity repeatedly along with the batten, the oil seal ring can be guided and limited in the installation process, and the oil seal ring can be stable and does not deviate when being pressed by non-axial force.

Description

Technical Field

[0001] The utility model relates to the technical field of rubber sealing parts, in particular to a pressure-resistant structure of a corrosion-resistant oil sealing part. Background Art

[0002] Lubricating oil is often used in mechanical transmission systems to reduce friction between parts. Therefore, oil seals are often installed at the contact points between the transmission parts of the machine body and the outside world to isolate them from external dirt.

[0003] According to the publication (announcement) number: CN113714975B, publication (announcement) date: 2021-12-28, a rotary oil seal press-fitting fixture is disclosed.

[0004] In the prior art including the above-mentioned patent, when a damaged oil seal is removed from the engine body and a new oil seal is replaced, the oil seal needs to be inserted into the installation position, and then a flat plate is used to press the oil seal. Finally, a tool is used to knock the flat plate to stably send the oil seal into the installation hole. The purpose of using the flat plate as an auxiliary is to avoid the tool from directly contacting the oil seal and causing displacement, which affects the installation of the oil seal. However, when the flat plate is knocked by the tool, if the knocking position is not the axial position of the oil seal, the oil seal will still be offset to a certain extent. Usually, the space of the engine body where the oil seal is installed is small. Even after the oil seal is installed, the service life of the oil seal will be affected by a small amount of displacement, and the number of repairs will increase. Utility Model Content

[0005] The purpose of the utility model is to provide a pressure-resistant structure of a corrosion-resistant oil seal, aiming to solve the above-mentioned problems.

[0006] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0007] A pressure-resistant structure of a corrosion-resistant oil seal, comprising a shaft and a sleeve hole, and an oil seal ring provided with a lip and a spring, wherein a skeleton is provided in the oil seal ring;

[0008] The frame is provided with slats movably arranged thereon, and the slats are provided with protrusions;

[0009] A slideway that slidably cooperates with the protrusion is provided in the sleeve hole, and a pit is provided in the slideway.

[0010] Preferably, an arc plate that contacts the spring is fixedly mounted on the frame, and a push rod for pushing the slats is fixedly mounted on the arc plate.

[0011] Preferably, a connecting plate is provided at the end of the arc plate, and the connecting plate is in contact with the frame.

[0012] Preferably, the deformed frame bends the arc plate and is used to move the push rod away from the slats.

[0013] Preferably, the frame is provided with a frame edge, and the frame edge moves synchronously with the arc plate in the bent state.

[0014] In the above technical solution, the utility model provides a pressure-resistant structure of a corrosion-resistant oil seal, which has the following beneficial effects: by sleeve-mounting the oil seal ring on the shaft and sliding it to the end of the sleeve hole, the multiple protrusions slide into the slideway, so that the protrusions guide the oil seal ring so that the oil seal ring slides into the sleeve hole for installation, and then the first circle of protrusions is clamped into the first circle of pits near the end of the slideway to achieve preferential docking, and in the process of continuing to press the oil seal ring, the second circle of protrusions is clamped into the first circle of pits to achieve double-circle limited docking, and this step is repeated in sequence until the protrusions are clamped into all the pits, so that the oil seal ring is installed more firmly as it is installed inward, and the strips repeatedly move in the cavity, so that the oil seal ring can be guided and limited during the installation process, and the oil seal ring can be stabilized and not deflected even when non-axial force is pressed, because if it deflects, the protrusions will cause the oil seal ring to be stuck during installation. Only axial stable movement can make the protrusions stably clamped in the pits, thereby completing the stable installation of the oil seal ring and reducing the number of maintenance times. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0016] Figure 1 A schematic diagram of the assembly of the shaft, oil seal ring and sleeve hole provided in an embodiment of the present utility model;

[0017] Figure 2 Schematic diagram of the explosion of the shaft, oil seal and sleeve provided in the embodiment of the present utility model;

[0018] Figure 3 A partial schematic diagram of a side cross-section of an oil seal ring provided in an embodiment of the present utility model;

[0019] Figure 4 for Figure 3 A magnified schematic diagram of point A;

[0020] Figure 5 for Figure 3 Enlarged schematic diagram of point B.

[0021] Description of reference numerals:

[0022] 1. Shaft; 11. Bushing; 2. Oil seal; 21. Lip; 22. Spring; 23. Frame; 231. Frame edge; 3. Arc plate; 31. Connecting plate; 32. Push rod; 4. Slat; 41. Protrusion; 42. Slide; 421. Concave. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0024] like Figure 1-5 As shown, a pressure-resistant structure of a corrosion-resistant oil seal includes a shaft 1 and a sleeve hole 11, and also includes an oil seal ring 2 provided with a lip 21 and a spring 22, and a skeleton 23 is provided in the oil seal ring 2;

[0025] The frame 23 is provided with a slat 4 movably, and the slat 4 is provided with a protrusion 41;

[0026] A slideway 42 is defined in the sleeve hole 11 and is slidably engaged with the protrusion 41 . A recess 421 is defined in the slideway 42 .

[0027] Specifically, the sleeve hole 11 is a hole in the transmission body for installing the oil seal ring 2. The oil seal ring 2 is made of rubber, and the skeleton 23 is an elastic metal ring. Both are existing technologies and will not be described in detail here.

[0028] Furthermore, the slats 4 are arranged circumferentially in the oil seal ring 2 , a cavity is opened in the oil seal ring 2 for the slats 4 to move, equidistantly arranged protrusions 41 are fixedly mounted on the slats 4 , and holes are opened on the frame 23 for the protrusions 41 to slide.

[0029] The oil seal ring 2 is sleeved on the shaft 1 and slid to the end of the sleeve hole 11, so that the multiple protrusions 41 slide into the slideway 42, so that the protrusions 41 form a guide for the oil seal ring 2 so that the oil seal ring 2 can slide into the sleeve hole 11 for installation. Then, the first circle of protrusions 41 are snapped into the first circle of pits 421 near the end of the slideway 42 to achieve preferential docking. In the process of continuing to press the oil seal ring 2, the second circle of protrusions 41 are snapped into the first circle of pits 421 to achieve double circle limit docking, and this step is repeated in sequence. The oil seal ring 2 is installed more firmly as it is moved inward, and the strip 4 moves repeatedly in the cavity, so that the oil seal ring 2 can be guided and limited during installation, and the oil seal ring 2 can be kept stable without deflection even when pressed with non-axial force, because the protrusion 41 will cause the oil seal ring 2 to be stuck when it is deflected. Only axial stable movement can make the protrusion 41 stably stuck in the pit 421, thereby completing the stable installation of the oil seal ring 2 and reducing the number of maintenance times.

[0030] As an embodiment further provided by the present invention, an arc plate 3 is fixedly mounted on the frame 23 to keep in contact with the spring 22 , and a push rod 32 for pushing the slat 4 is fixedly mounted on the arc plate 3 .

[0031] Specifically, the arc plate 3 is an elastic metal plate, and the push rod 32 is fixedly installed on the inner side of the arc-shaped recess of the arc plate 3 .

[0032] By sleeve-mounting the oil seal ring 2 on the shaft 1 and sliding it, the spring 22 deforms and squeezes the arc plate 3 away from the axis and deforms radially outward, so that the push rod 32 pushes the slat 4 to slide in the cavity, and the protrusion 41 extends out of the outer ring side wall of the oil seal ring 2 so that the protrusion 41 cooperates with the slide 42 and the pit 421. In the process of the protrusion 41 being stuck in / sliding out of the pit 421, the arc plate 3 is adaptively deformed to cope with the movement of the slat 4.

[0033] As another embodiment further provided by the present invention, a connecting plate 31 is provided at the end of the arc plate 3 , and the connecting plate 31 is in contact with the frame 23 .

[0034] Specifically, the connecting plate 31 is embedded in the rubber inside the oil seal ring 2 so that the skeleton 23 can move synchronously with the connecting plate 31 .

[0035] By combining the connecting plate 31 on the arc plate 3 with the “N”-shaped skeleton 23 , the pressure resistance of the oil seal ring 2 can be improved, the stability of the oil seal ring 2 can be improved, and the elastic effect of the spring 22 can also be enhanced.

[0036] As another embodiment further provided by the present invention, the deformed skeleton 23 bends the arc plate 3 and is used to enable the push rod 32 to separate from the slat 4 and move.

[0037] By pressing the outer wall of the oil seal ring 2 in contact with the air, force is applied to the skeleton 23, and then transmitted to the arc plate 3 through the connecting plate 31, so that the arc plate 3 is close to the axis and deformed inward, so as to disengage the push rod 32 from the socket on the inner side of the oil seal ring 2, so that the slat 4 loses the push of the push rod 32 and resets, so that the multiple protrusions 41 retract into the outer ring side wall of the oil seal ring 2 again, so as to unlock the oil seal ring 2 from the sleeve hole 11, making it convenient to remove and replace the oil seal ring 2 from the sleeve hole 11. After pressing the skeleton 23 and then suddenly releasing it, the elastic force generated by the arc plate 3 restoring its deformation can shake the oil seal ring 2 out of the sleeve hole 11 for a distance, so that the oil seal ring 2 can be pulled out of the sleeve hole 11.

[0038] As another embodiment further provided by the present invention, a frame edge 231 is provided on the frame 23, and the frame edge 231 moves synchronously with the arc plate 3 in the bent state.

[0039] Specifically, the frame edge 231 is also an elastic metal ring.

[0040] By deforming the arc plate 3 inwardly as it approaches the axis, the arc plate 3 that is bent again pushes the edge 231 of the frame toward the inside of the body. On the one hand, this increases the elastic force that shakes the oil seal ring 2 out of the sleeve hole 11. On the other hand, it pushes the lubricating oil around the oil seal ring 2 into the inside of the body, reducing the suction force when the oil seal ring 2 is shaken out.

[0041] Working principle: The oil seal ring 2 is sleeved on the shaft 1 and slid to the end of the sleeve hole 11, so that multiple protrusions 41 slide into the slideway 42, so that the protrusions 41 guide the oil seal ring 2 so that the oil seal ring 2 slides into the sleeve hole 11 for installation, and then the first circle of protrusions 41 are inserted into the first circle of pits 421 close to the end of the slideway 42 to achieve priority docking, and in the process of continuing to press the oil seal ring 2, the second circle of protrusions 41 are inserted into the first circle of pits 421 to achieve double-circle limited docking, and this step is repeated in sequence until the protrusions 41 are inserted into all the pits 421, so that the oil seal ring 2 becomes more stable as it is installed inward, and as the slats 4 repeatedly move in the cavity, the oil seal ring 2 can be guided and limited during the installation process, so that non-axial force pressing can also make the oil seal ring 2 stable and not deviate.

[0042] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A pressure-resistant structure of a corrosion-resistant oil seal, comprising a shaft (1) and a sleeve hole (11), characterized in that: It also includes an oil seal ring (2) provided with a lip (21) and a spring (22), wherein a skeleton (23) is provided in the oil seal ring (2); A slat (4) is movably provided on the frame (23), and a protrusion (41) is provided on the slat (4); A slideway (42) that slidably cooperates with the protrusion (41) is provided in the sleeve hole (11), and a recess (421) is provided in the slideway (42).

2. The pressure-resistant structure of a corrosion-resistant oil seal according to claim 1, characterized in that: An arc plate (3) that is in contact with the spring (22) is fixedly mounted on the frame (23), and a push rod (32) for pushing the slat (4) is fixedly mounted on the arc plate (3).

3. The pressure-resistant structure of a corrosion-resistant oil seal according to claim 2, characterized in that: A connecting plate (31) is provided at the end of the arc plate (3), and the connecting plate (31) is in contact with the frame (23).

4. The pressure-resistant structure of a corrosion-resistant oil seal according to claim 3, characterized in that: The deformed frame (23) bends the arc plate (3) and is used to move the push rod (32) away from the slat (4).

5. The pressure-resistant structure of a corrosion-resistant oil seal according to claim 4, characterized in that: The frame (23) is provided with a frame edge (231), and the frame edge (231) moves synchronously with the arc plate (3) in a bent state.

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