Bidirectional sealing rotary oil seal

Abstract

The utility model relates to the technical field of industrial machinery, and discloses a bidirectional sealing rotary oil seal which comprises a rubber ring, a mounting groove is formed in the bottom of the rubber ring, a plurality of clamping grooves are formed in the outer wall of the rubber ring, and a first framework is slidably connected to the left side of the inner wall of the mounting groove. A second framework is slidably connected to the right side of the inner wall of the mounting groove, a plurality of sliding grooves are formed in the outer wall of the first framework and the outer wall of the second framework, clamping blocks are slidably connected to the inner walls of the sliding grooves, a first sliding ring is fixedly connected to the inward side of the clamping block on the left side, and a second sliding ring is fixedly connected to the inward side of the clamping block on the right side. According to the utility model, after the rubber ring is sleeved on the shaft needing to be installed, the clamping block on the first framework side is pressed to enable the first sliding ring to move together, so that the purpose of separately installing the frameworks and the sealing part is achieved, the installation difficulty is reduced, the deformation of the frameworks is avoided, and the installation loss is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial machinery, in particular to a bidirectional sealing rotary oil seal. Background Art

[0002] An oil seal is a sealing element used to prevent lubricating oil leakage and external contaminants from entering the interior of mechanical equipment. It plays a vital role in various mechanical devices and is widely used in the fields of automotive industrial machinery and hydraulic devices. Its types are divided into skeleton oil seals, combination oil seals and rotary oil seals. Skeleton oil seals have a metal skeleton, providing good support and sealing performance and are widely used in automobile engines and gearboxes. Combination oil seals are composed of multiple sealing elements, providing multiple sealing effects for high-pressure hydraulic systems and heavy-loaded machinery.

[0003] The rotary oil seal is a sealing device specially used for rotating shafts. Its main function is to prevent lubricating oil leakage and prevent external contaminants from entering bearings and other rotating parts. It is divided into double-lip rotary oil seals and single-lip rotary oil seals. Double-lip rotary oil seals have two sealing lips, providing double sealing effects and are suitable for highly polluted environments and occasions requiring higher sealing performance. Single-lip oil seals have only one sealing lip and a simple structure and can only be used in occasions with ordinary sealing requirements.

[0004] After searching, the Chinese patent announcement number: CN215410186U discloses a two-way sealing rotary oil seal for vehicles, which solves the problem in the prior art that mud and water enter from the two-way sealing rotary oil seal, thereby causing the two-way sealing rotary oil seal to leak oil, and in severe cases, mud and water enter the interior of the transmission system, causing the transmission system or even the entire vehicle to be scrapped. A two-way sealing rotary oil seal for vehicles, including an assembly skeleton, one side of the assembly skeleton is fixedly connected to an inner oil seal, and the other side of the assembly skeleton is fixedly connected to an outer oil seal, one side of the outer oil seal is fixedly connected to an outer diameter static seal, the inner oil seal includes a dust lip, one side of the dust lip is fixedly connected to the inner skeleton, and one side of the inner skeleton is fixedly connected to an inner diameter static seal. The utility model has the function of preventing foreign matter in the engine oil from entering the main sealing lip from the outside, and preventing dust, mud and water from entering the main sealing lip from the outside, which greatly improves the sealing life of the oil seal. However, during the installation process, the oil seal still needs to be installed on the rotating shaft by pressing, which makes the skeleton easily deformed and damaged, increases the difficulty of installation, and increases installation loss. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a two-way sealing rotary oil seal, which aims to improve the problem in the prior art that the oil seal needs to be installed on the rotating shaft by pressing during the installation process of the existing two-way sealing rotary oil seal, which makes the skeleton easily deformed and damaged.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a two-way sealed rotary oil seal, comprising a rubber ring, the bottom of the rubber ring is provided with a mounting groove, the outer wall of the rubber ring is provided with a plurality of slots, the inner wall of the mounting groove is slidably connected to the first frame on the left side, and the inner wall of the mounting groove is slidably connected to the second frame on the right side, the outer walls of the first frame and the second frame are provided with a plurality of sliding grooves, the inner walls of the sliding grooves are slidably connected to a card block, the inward side of the left card block is fixedly connected to a sliding ring 1, and the inward side of the right card block is fixedly connected to a sliding ring 2, the bottom of the sliding ring 2 is provided with a limiting groove, the right side of the sliding ring 1 is fixedly connected to a limiting column, the bottoms of the first frame and the second frame are provided with a threaded groove, the inner wall of the threaded groove is threadedly connected to a screw, and a flat pressure structure is provided in the middle of the inner wall of the rubber ring, and the flat pressure structure is used to balance the air pressure of the sealing side.

[0007] Through the above technical solution: the threaded groove is used to fix the second frame and the first frame with screws, the mounting groove is used to engage the first frame and the second frame therein, thereby engaging the first frame and the second frame and the rubber ring with each other, and the sliding ring one and the sliding ring two are used to pull the card block to move in the sliding groove.

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

[0009] The flat pressing structure includes a liquid storage tank, which is opened in the middle of the inner wall of the rubber ring. The inner wall of the liquid storage tank is connected to multiple hollow tubes. The top of the hollow tube is opened with a liquid inlet, and the bottom of the hollow tube is opened with a liquid outlet. The inner wall of the hollow tube is slidably connected to a first spring, and the top of the first spring is fixedly connected to a sliding ball.

[0010] Through the above technical solution: the liquid storage tank is used to store the liquid flowing out of the liquid outlet, and the first spring is used to fit the sliding ball to the liquid inlet.

[0011] As a further description of the above technical solution:

[0012] The outer wall of the sliding ball is slidably connected to the inner wall of the hollow tube, and the outer wall of the sliding ball is in contact with the inner wall of the liquid inlet.

[0013] Through the above technical solution, the sliding ball can slide with the inner wall of the hollow tube so that the liquid can flow into the hollow tube from the liquid inlet.

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

[0015] The outer wall of the clamping block is slidably connected to the inner wall of the clamping slot, and the outer wall of the clamping block is slidably connected to the outer wall of the sliding slot.

[0016] Through the above technical solution, the sliding connection between the clamping block and the clamping slot enables the first frame and the second frame to be engaged with the rubber ring.

[0017] As a further description of the above technical solution:

[0018] The plurality of clamping slots are all opened at the same level, and the inner wall of the limiting slot is slidably connected to the outer wall of the limiting column.

[0019] Through the above technical solution, the limiting column can be inserted into the limiting groove, making it more convenient for the sliding ring 2 to be installed on the sliding ring 1.

[0020] As a further description of the above technical solution:

[0021] A spring groove is provided on the top of the rubber ring, a second spring is fixedly connected to the inner wall of the spring groove, and a limiting block is fixedly connected to the inner side of the spring groove.

[0022] Through the above technical solution: the second spring can strengthen the fit between the rubber ring and the rotating shaft.

[0023] As a further description of the above technical solution:

[0024] A sealing lip is fixedly connected to the inward side of the limit block, and a dustproof lip is fixedly connected to the bottom of the inner wall of the rubber ring.

[0025] Through the above technical solution: the dustproof lip is used to prevent external dust from entering the liquid sealed by the rear side of the sealing lip.

[0026] As a further description of the above technical solution:

[0027] A gasket is slidably connected to the outer wall of the screw, and a nameplate is fixedly connected to the bottom of the first frame.

[0028] Through the above technical solution: the gasket is 1 used to prevent the loosening of the screw caused by vibration.

[0029] The utility model has the following beneficial effects:

[0030] 1. In the utility model, after the rubber ring is put on the shaft to be installed, the clamping block on the side of the first frame is pressed to move the sliding rings together, and then the first frame is slid into the rubber ring along the installation groove, and then the second frame is clamped into the installation groove, so that the sliding ring second squeezes the sliding ring until the limit column is engaged with the limit groove and the clamping block is clamped into the clamping groove, thereby achieving the purpose of separately installing the frame and the sealing part, reducing the installation difficulty, avoiding deformation of the frame, and reducing installation loss.

[0031] 2. In the utility model, liquid enters the liquid inlet through the side of the limit block and squeezes the sliding ball, which presses the first spring downward to slide in the hollow tube, so that the liquid flows into the hollow tube and flows into the liquid storage tank from the liquid outlet, achieving the purpose of balancing the pressure on the sealing side, extending the service life, and reducing the possibility of leakage due to excessive pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a front perspective view of a bidirectional sealing rotary oil seal proposed by the present invention;

[0033] Figure 2 This is a side view of a bidirectional sealing rotary oil seal proposed by the utility model;

[0034] Figure 3 This is a partial structural exploded view of a bidirectional sealing rotary oil seal proposed in the present invention;

[0035] Figure 4 This is a cross-sectional view of a spring groove of a bidirectional sealing rotary oil seal proposed by the present invention;

[0036] Figure 5 This is a cross-sectional view of a sliding ball of a bidirectional sealing rotary oil seal proposed by the present invention;

[0037] Figure 6 This is a schematic diagram of the partial structure of a bidirectional sealing rotary oil seal proposed by the utility model.

[0038] Legend:

[0039] 1. Rubber ring; 2. Flat-pressing structure; 201. Sliding ball; 202. Liquid inlet; 203. Hollow tube; 204. First spring; 205. Liquid outlet; 206. Liquid storage tank; 3. Spring slot; 4. Limit block; 5. Sealing lip; 6. First frame; 7. Dustproof lip; 8. Second frame; 9. Sliding ring 1; 10. Slide groove; 11. Block; 12. Slot; 13. Screw; 14. Threaded groove; 15. Nameplate; 16. Gasket; 17. Limit groove; 18. Sliding ring 2; 19. Second spring; 20. Limit column; 21. Mounting slot. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] Please see the attached Figure 1 - Attachment Figure 3 , the utility model provides an embodiment: a two-way sealed rotary oil seal, including a rubber ring 1, a mounting groove 21 is provided at the bottom of the rubber ring 1, and a plurality of card grooves 12 are provided on the outer wall of the rubber ring 1. The rubber ring 1 is the main structure for preliminary sealing. The left side of the inner wall of the mounting groove 21 is slidably connected to the first skeleton 6, and the right side of the inner wall of the mounting groove 21 is slidably connected to the second skeleton 8. The outer walls of the first skeleton 6 and the second skeleton 8 are provided with a plurality of sliding grooves 10. The mounting groove 21 is used to limit the first skeleton 6 and the second skeleton 8 therein. The inner wall of the sliding groove 10 is slidably connected to a card block 11. The inward side of the left card block 11 is fixedly connected to a sliding ring 9, and the inward side of the right card block 11 is fixedly connected to a sliding ring 2 18. The sliding ring 9 and the sliding ring 2 18 are used Drive the block 11 to move to help with installation. A limiting groove 17 is provided at the bottom of the sliding ring 18. The right side of the sliding ring 19 is fixedly connected to the limiting column 20. The limiting groove 17 can engage with the limiting column 20 so that the sliding ring 19 and the sliding ring 2 18 are squeezed and installed with each other. A threaded groove 14 is provided at the bottom of the first frame 6 and the second frame 8. The inner wall of the threaded groove 14 is threadedly connected with a screw 13. The screw 13 is used to fix the first frame 6 and the second frame 8 through the threaded groove 14. A flat pressure structure 2 is provided in the middle of the inner wall of the rubber ring 1. The flat pressure structure 2 is used to balance the air pressure of the sealing test. The outer wall of the screw 13 is slidably connected with a gasket 16. The bottom of the first frame 6 is fixedly connected with a nameplate 15. The gasket 16 is used to prevent the screw 13 from causing wear on the surface of the structure when it is installed.

[0042] Specifically, the nameplate 15 is used to identify and provide relevant information about the device, the gasket 16 is used to strengthen the screw 13 to prevent it from loosening due to vibration and prevent the screw 13 from causing wear to the structure, the threaded groove 14 is used for the screw 13 to fix the second frame 8 and the first frame 6, the slide groove 10 is used to engage with the block 11, the second frame 8 and the first frame 6 are used to support the rubber ring 1 to enhance its stability, and the limit groove 17 is used to engage with the limit column 20 so that the sliding ring 1 9 and the sliding ring 2 18 squeeze each other and limit them.

[0043] Please see the attached Figure 4 - Attachment Figure 6The flat-pressure structure 2 includes a liquid storage tank 206, which is provided in the middle of the inner wall of the rubber ring 1. The liquid storage tank 206 is used to store excess liquid on one side with excessive pressure. The inner wall of the liquid storage tank 206 is connected with a plurality of hollow tubes 203. The top of the hollow tube 203 is provided with a liquid inlet 202, and the bottom of the hollow tube 203 is provided with a liquid outlet 205. The liquid inlet 202 is used to guide the flow of liquid. The inner wall of the hollow tube 203 is slidably connected with a first spring 204. The top of the first spring 204 is fixedly connected with a sliding ball 201. The first spring 204 is used to help the sliding ball 201 reset. The outer wall of the sliding ball 201 is slidably connected to the inner wall of the hollow tube 203. The outer wall of the sliding ball 201 fits with the inner wall of the liquid inlet 202. The sliding ball 201 is used to cooperate with the first spring 204 to open and close the liquid inlet 202 to control the pressure;

[0044] Specifically, the outer wall of the sliding ball 201 fits tightly against the inner wall of the liquid inlet 202, ensuring that the liquid will not leak when entering the hollow tube 203. The first spring 204 is used to reset the sliding ball 201 and allow it to fit against the liquid inlet 202. The liquid storage tank 206 is used to store the liquid flowing out of the liquid outlet 205 to prevent liquid leakage. The sliding ball 201 is used to slide in the hollow tube 203, thereby opening and closing the liquid inlet 202.

[0045] Please see the attached Figure 3 - Attachment Figure 5 , the inward side of the limit block 4 is fixedly connected with a sealing lip 5, and the bottom of the inner wall of the rubber ring 1 is fixedly connected with a dustproof lip 7. The dustproof lip 7 is used to prevent external dust from entering the oil seal. A spring groove 3 is provided on the top of the rubber ring 1, and the inner wall of the spring groove 3 is fixedly connected with a second spring 19. The second spring 19 is used to make the rubber ring 1 fit more tightly to the rotating shaft. The inner side of the spring groove 3 is fixedly connected with the limit block 4. The outer wall of the clamping block 11 is slidably connected to the inner wall of the clamping groove 12. The outer wall of the clamping block 11 is slidably connected to the outer wall of the slide groove 10. The clamping block 11 can be engaged with the slide groove 10 to fix the rubber ring 1 to the second frame 8 and the first frame 6. Multiple clamping grooves 12 are all opened at the same horizontal height. The inner wall of the limit groove 17 is slidably connected to the outer wall of the limit column 20. The limit groove 17 can be engaged with the limit column 20 so that the sliding ring 1 9 and the sliding ring 2 18 are engaged with each other;

[0046] Specifically, the second spring 19 can pressurize the rubber ring 1, and the limit block 4 is used to prevent the second spring 19 from moving out of the engagement. The multiple card slots 12 are all opened at the same horizontal height, ensuring the symmetry and balance of the device during installation and use. The dustproof lip 7 further enhances the sealing effect, prevents dust from entering the oil seal, and ensures the cleanliness of the internal environment. The sealing lip 5 is used to prevent the liquid in the rotating shaft from flowing out and enhance the sealing.

[0047] Working principle: When installing, first put the rubber ring 1 on the rotating shaft to be installed, then clamp the first frame 6 into the rubber ring 1 along the installation groove 21, and slide the clamping block 11 backward along the slide groove 10, so that the sliding ring 9 moves backward, then clamp the second frame 8 into the rubber ring 1 along the installation groove 21, and let the limiting column 20 be engaged in the limiting groove 17, so that the sliding ring 18 squeezes the sliding ring 9 to drive the clamping block 11 to move outward, so that the sliding ring 18 and the clamping block 11 on the outer wall of the sliding ring 18 and the sliding ring 9 are both engaged with the clamping groove 12, and then screw the screw 13 into the threaded groove 14 to fix the first frame 6 and the second frame 8;

[0048] When the oil seal is working, when the pressure of the liquid sealed by its sealing lip 5 side is high, the sliding ball 201 will be squeezed from the liquid inlet 202, so that the liquid inlet 202 presses the hollow tube 203 downward, thereby moving downward in the hollow tube 203, and at the same time, the liquid can flow into the hollow tube 203 and flow from the liquid outlet 205 along the hollow tube 203 into the liquid storage tank 206. When the pressure is balanced, the first spring 204 will rebound upward, so that the sliding ball 201 will block the liquid inlet 202 again to prevent the liquid from continuing to flow.

[0049] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A bidirectional sealing rotary oil seal, comprising a rubber ring (1), characterized in that: The bottom of the rubber ring (1) is provided with a mounting groove (21), the outer wall of the rubber ring (1) is provided with a plurality of clamping grooves (12), the left side of the inner wall of the mounting groove (21) is slidably connected to the first frame (6), the right side of the inner wall of the mounting groove (21) is slidably connected to the second frame (8), the outer walls of the first frame (6) and the second frame (8) are provided with a plurality of sliding grooves (10), the inner walls of the sliding grooves (10) are slidably connected to the clamping blocks (11), and the inner side of the left clamping blocks (11) is fixedly connected to the sliding ring ( 9), the inward side of the right-side block (11) is fixedly connected to a sliding ring 2 (18), a limiting groove (17) is provided at the bottom of the sliding ring 2 (18), and the right side of the sliding ring 1 (9) is fixedly connected to a limiting column (20), the bottoms of the first skeleton (6) and the second skeleton (8) are both provided with a threaded groove (14), the inner wall of the threaded groove (14) is threadedly connected with a screw (13), and a flat pressure structure (2) is provided in the middle of the inner wall of the rubber ring (1), and the flat pressure structure (2) is used to balance the air pressure of the sealing surface.

2. The bidirectional sealing rotary oil seal according to claim 1, characterized in that: The flattening structure (2) includes a liquid storage tank (206), the liquid storage tank (206) is opened in the middle of the inner wall of the rubber ring (1), the inner wall of the liquid storage tank (206) is connected to a plurality of hollow tubes (203), the top end of the hollow tube (203) is opened with a liquid inlet (202), the bottom end of the hollow tube (203) is opened with a liquid outlet (205), the inner wall of the hollow tube (203) is slidably connected to a first spring (204), and the top of the first spring (204) is fixedly connected to a sliding ball (201).

3. The bidirectional sealing rotary oil seal according to claim 2, characterized in that: The outer wall of the sliding ball (201) is slidably connected to the inner wall of the hollow tube (203), and the outer wall of the sliding ball (201) is in contact with the inner wall of the liquid inlet (202).

4. The bidirectional sealing rotary oil seal according to claim 1, characterized in that: The outer wall of the clamping block (11) is slidably connected to the inner wall of the clamping slot (12), and the outer wall of the clamping block (11) is slidably connected to the outer wall of the sliding slot (10).

5. The bidirectional sealing rotary oil seal according to claim 1, characterized in that: The plurality of clamping slots (12) are all opened at the same horizontal height, and the inner wall of the limiting slot (17) is slidably connected to the outer wall of the limiting column (20).

6. The bidirectional sealing rotary oil seal according to claim 1, characterized in that: A spring groove (3) is provided on the top of the rubber ring (1), a second spring (19) is fixedly connected to the inner wall of the spring groove (3), and a limiting block (4) is fixedly connected to the inner side of the spring groove (3).

7. The bidirectional rotary oil seal according to claim 6, characterized in that: A sealing lip (5) is fixedly connected to the inward side of the limit block (4), and a dustproof lip (7) is fixedly connected to the bottom of the inner wall of the rubber ring (1).

8. The bidirectional sealing rotary oil seal according to claim 1, characterized in that: A gasket (16) is slidably connected to the outer wall of the screw (13), and a nameplate (15) is fixedly connected to the bottom of the first frame (6).

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