Rotary combined oil seal

Abstract

The utility model provides a rotary type combined oil seal, which relates to the technical field of oil seals, and comprises a shell, a sealing lip and a framework, the framework is positioned inside the shell, the inner wall of a groove is connected with a push ring in a sliding manner, the outer surface of a pull rod is connected with a stop lever, the inner side of a stop block is provided with a sliding chute, and the sliding chute is connected with a push rod. According to the rotary type combined oil seal, the push ring, the groove, the spring, the check block and the pull rod are matched, the groove enables the shell to have a shrunk space, and the shell is provided with the shrunk space, so that the shrunk space is shrunk, and the shrunk space is shrunk, and the shrunk space is shrunk, so that the shrunk space is shrunk, and the shrunk space is shrunk. After being compressed, the spring pushes the push ring to move towards the interior of the groove, the push ring stretches the shell after entering the interior of the groove, the diameter of the shell is increased, the outer surface of the shell is tightly contacted with the inner wall of the mounting hole after the shell is enlarged, the shell is conveniently mounted into the mounting hole after the shell is shrunk, and the mounting convenience of the rotary combined oil seal is improved.

Description

Technical Field

[0001] This utility model relates to a combined oil seal, specifically a rotary combined oil seal, belonging to the field of oil seal technology. Background Technology

[0002] Rotary combination oil seals are sealing devices used for rotating shafts. They are usually composed of multiple sealing elements to provide better sealing performance. These oil seals are widely used in various mechanical equipment, such as engines, reducers, and motors, to prevent lubricating oil or other liquids from leaking from the gap between the rotating shaft and stationary parts.

[0003] Most existing rotary combination oil seals are larger than the diameter of the mounting hole. The rotary combination oil seal and the mounting hole are interference fits. By applying a thrust to the rotary combination oil seal from the outside, it is pushed into the mounting hole. However, the large thrust applied to the rotary combination oil seal during installation may cause deformation or damage to the rotary combination oil seal, resulting in a gap between the rotary combination oil seal and the mounting hole, leading to lubricating oil leakage. To address this issue, we provide a rotary combination oil seal to solve the above problems. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a rotary combined oil seal, the specific technical solution of which is as follows:

[0005] A rotary composite oil seal includes a housing, a sealing lip, and a skeleton. The skeleton is located inside the housing. A groove is formed on the inner side of the housing, and the groove has an inclined angle. A push ring is slidably connected to the inner wall of the groove. A pull rod is connected to the inner bottom wall of the groove. A stop rod is connected to the outer surface of the pull rod. A stop block is slidably connected to the outer surface of the pull rod. A sliding groove is formed on the inner side of the stop block. The inner wall of the sliding groove is slidably connected to the outer surface of the stop rod. A retaining groove is formed on the inner side of the stop block. The retaining groove is adapted to the stop rod. A spring is sleeved on the outside of the pull rod.

[0006] Preferably, one end of the spring is connected to the inner bottom wall of the groove, and the other end of the spring is connected to one side of the stop block. Preferably, a dustproof lip is connected to one side of the outer shell, a main lip is connected to the inner wall of the outer shell, a receiving groove is formed on the inner side of the main lip, and a coiled spring is installed inside the receiving groove.

[0007] Preferably, the outer shell, main lip, and dustproof lip are integrally formed, and the outer shell, main lip, and dustproof lip are made of rubber. Preferably, the outer surface of the main lip is connected to a slide rail, and the slide rail has an L-shaped cross-section. The inner wall of the sealing lip is connected to a slide channel, and the inner wall of the slide channel is rotatably connected to the outer surface of the slide rail.

[0008] Preferably, the slide rail and slide track are made of metal, and the sealing lip is made of rubber.

[0009] Preferably, the number of pull rods is multiple, and the multiple pull rods are arranged in a circular array.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. This rotary combination oil seal utilizes the cooperation between the push ring, groove, spring, stop, and pull rod. The groove provides space for the outer shell to accommodate the push ring and allows for shrinkage. The movement of the stop provides a pushing force to the compression spring. After the spring is compressed, it pushes the push ring into the groove. Once inside the groove, the push ring expands the outer shell, increasing its diameter. The enlarged outer surface of the shell tightly contacts the inner wall of the mounting hole, preventing lubricating oil from leaking out. The reduced size of the shell facilitates installation into the mounting hole, improving the ease of installation of the rotary combination oil seal.

[0012] 2. This rotary combination oil seal achieves a tight seal between the stop block and the stop groove. The stop groove has space to accommodate the stop rod. After the stop block rotates, it contacts the stop rod through the stop groove. The stop groove wraps around the stop rod, confining it inside the stop groove. Under the elastic push of the spring, the stop groove and the stop rod have contact force. The stop block forms a barrier through the stop rod, improving the stability of the stop block and making the stop block provide more stable support for the spring. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a cross-sectional view of the internal structure of the outer shell in this utility model;

[0015] Figure 3 This is a schematic diagram of the exploded structure in this utility model;

[0016] Figure 4 In this utility model Figure 3 A magnified schematic diagram of the structure at point A in the diagram;

[0017] Figure 5 This is a schematic diagram of the overall three-dimensional structure of the stop block in this utility model.

[0018] Figure descriptions: 1. Outer shell; 2. Sealing lip; 3. Frame; 4. Groove; 5. Push ring; 6. Pull rod; 7. Stop bar; 8. Stop block; 9. Slide groove; 10. Stop groove; 11. Spring; 12. Dustproof lip; 13. Main lip; 14. Receiving groove; 15. Coil spring; 16. Slide rail; 17. Slide path. Detailed Implementation

[0019] The present invention will now be further described with reference to the accompanying drawings.

[0020] Please see Figures 1-5 A rotary composite oil seal includes a housing 1, a sealing lip 2, and a skeleton 3. The skeleton 3 is located inside the housing 1 and provides support for the housing 1 to prevent deformation, giving the housing 1 rigid support and increasing the hardness of the housing 1.

[0021] The inner side of the outer shell 1 is provided with a groove 4, and the groove 4 has an inclined angle. A push ring 5 is slidably connected to the inner wall of the groove 4. The groove 4 provides space for the outer shell 1 to accommodate the push ring 5. The push ring 5 has an inclined angle that matches the groove 4. Through the cooperation between the inclined angles, the push ring 5 can push the outer shell 1 to expand outward.

[0022] A pull rod 6 is connected to the inner bottom wall of the groove 4, and a stop bar 7 is connected to the outer surface of the pull rod 6. There are multiple pull rods 6, and the multiple pull rods 6 are arranged in a circular array. The pull rods 6 provide a pulling force to the stop block 8, so that the stop block 8 cannot move after contacting the stop bar 7.

[0023] A stop 8 is slidably connected to the outer surface of the pull rod 6. The stop 8 provides resistance to the push ring 5 and prevents the push ring 5 from moving. A groove 9 is provided on the inner side of the stop 8. The inner wall of the groove 9 is slidably connected to the outer surface of the stop rod 7. The groove 9 allows the stop 8 to move and guides the movement of the stop 8. A retaining groove 10 is provided on the inner side of the stop 8. The retaining groove 10 is adapted to the stop rod 7 and can wrap around the stop rod 7. After the stop 8 moves, the retaining groove 10 wraps around the stop rod 7, improving the stability of the stop 8.

[0024] A spring 11 is sleeved on the outside of the pull rod 6. One end of the spring 11 is connected to the inner bottom wall of the groove 4, and the other end of the spring 11 is connected to one side of the stop block 8. The spring 11 provides elastic pushing force to the push ring 5, pushing the push ring 5 into the groove 4. After the push ring 5 enters the groove 4, it pushes the outer shell 1 outward, expanding the diameter of the push ring 5, so that the outer side of the push ring 5 contacts the inner wall of the mounting hole more tightly.

[0025] A dustproof lip 12 is connected to one side of the outer casing 1, and a main lip 13 is connected to the inner wall of the outer casing 1. A receiving groove 14 is opened on the inner side of the main lip 13, and a coil spring 15 is installed inside the receiving groove 14. The coil spring 15 provides contraction elasticity to the main lip 13. The main lip 13 has better contraction force under the contraction of the coil spring 15, which increases the contact force between the main lip 13 and the rotating parts and improves the sealing performance of the main lip 13.

[0026] The outer shell 1, main lip 13, and dustproof lip 12 are integrally molded and made of rubber. The integral molding structure gives the outer shell 1, main lip 13, and dustproof lip 12 good structural strength and improves their service life. At the same time, the rubber outer shell 1, main lip 13, and dustproof lip 12 provide better sealing when connected to the rotating parts.

[0027] The outer surface of the main lip 13 is connected to a slide rail 16, and the slide rail 16 has an L-shaped cross-section. The inner wall of the sealing lip 2 is connected to a slide channel 17. The inner wall of the slide channel 17 is rotatably connected to the outer surface of the slide rail 16. The sealing lip 2 contacts the rotating part, preventing the lubricating oil adhering to the rotating part from leaking to the outside. The slide rail 16 and slide channel 17 are made of metal, and the sealing lip 2 is made of rubber. The metal slide rail 16 and slide channel 17 are easy to rotate. At the same time, the metal slide rail 16 and slide channel 17 are rigid, so that the slide channel 17 can support the sealing lip 2. The slide rail 16 can provide support for the main lip 13.

[0028] In use, the following steps are taken: First, the outer shell 1 is installed into the mounting hole. At the same time, the sealing lip 2, the main lip 13, and the dustproof lip 12 are fitted onto the outside of the rotating part. Then, the stop block 8 is pushed to move. After the stop block 8 moves, the spring 11 is compressed. After the spring 11 is compressed, some of the power is transmitted to the push ring 5. The spring 11 pushes the push ring 5 to move into the groove 4. After the push ring 5 moves, the outer shell 1 is expanded, so that the outer surface of the outer shell 1 is in tight contact with the inner wall of the mounting hole. At the same time as the stop block 8 moves, the slide 17 slides outside the stop rod 7. After the stop block 8 is compressed downward, the stop block 8 is rotated. Then, the stop groove 10 contacts the stop rod 7. After the stop groove 10 contacts the stop rod 7, it restricts the movement of the stop block 8 and maintains the stability of the stop block 8, so that the stop block 8 is always in the position of compressing the spring 11.

[0029] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without inventive effort, and these embodiments will all fall within the protection scope of the claims of this utility model.

Claims

1. A rotary combination oil seal comprising a housing (1), a sealing lip (2) and a skeleton (3), characterized in that: The skeleton (3) is located in the inside of the shell (1), the inner side of the shell (1) is provided with a groove (4), and the groove (4) has an inclined angle, the inner wall of the groove (4) is slidably connected with a push ring (5), the inner bottom wall of the groove (4) is connected with a pull rod (6), the outer surface of the pull rod (6) is connected with a stop rod (7), the outer surface of the pull rod (6) is slidably connected with a stop block (8), the inner side of the stop block (8) is provided with a sliding groove (9), the inner wall of the sliding groove (9) is slidably connected with the outer surface of the stop rod (7), the inner side of the stop block (8) is provided with a stop groove (10), the stop groove (10) is matched with the stop rod (7), and the outer portion of the pull rod (6) is sleeved with a spring (11).

2. A rotary combination oil seal according to claim 1, wherein: One end of the spring (11) is connected with the inner bottom wall of the groove (4), and the other end of the spring (11) is connected with one side of the stop block (8).

3. A rotary combination oil seal according to claim 1, wherein: The shell (1) is connected with a dustproof lip (12) on one side, the inner wall of the shell (1) is connected with a main lip (13), the inner side of the main lip (13) is provided with a containing groove (14), and the inside of the containing groove (14) is provided with a ring spring (15).

4. A rotary combination oil seal according to claim 3, wherein: The shell (1), the main lip (13) and the dustproof lip (12) are integrally formed, and the shell (1), the main lip (13) and the dustproof lip (12) are made of rubber material.

5. A rotary combination oil seal according to claim 3, wherein: The outer surface of the main lip (13) is connected with a sliding rail (16), and the cross section of the sliding rail (16) is L-shaped, the inner wall of the sealing lip (2) is connected with a sliding channel (17), and the inner wall of the sliding channel (17) is rotatably connected with the outer surface of the sliding rail (16).

6. A rotary combination oil seal according to claim 5, wherein: The sliding rail (16) and the sliding channel (17) are made of metal material, and the sealing lip (2) is made of rubber material.

7. The rotary combination oil seal of claim 1 wherein: The number of the pull rod (6) is multiple, and the multiple pull rods (6) are circularly arranged.

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