Split-type rotary oil seal capable of being split for shaft

Abstract

The utility model discloses a dissectable split type rotary oil seal for a shaft, which comprises an oil seal body, the inner side of the oil seal body is provided with a sealing lip, the inner side of the sealing lip is provided with a connecting shaft body, and the outer side of the connecting shaft body is provided with a connecting plate; the first matching plate is arranged on the outer side of the oil seal body, a reinforcing structure is arranged in the oil seal body, a connecting groove is formed in the first matching plate, a second matching plate is installed on the left side of the first matching plate, a connecting bolt is connected into the second matching plate, and the sealing lip is of a C-shaped structure. And the sealing lips are symmetrically arranged front and back relative to the center line of the oil seal body. According to the dissectable split type rotary oil seal for the shaft, the dissectable split type design is carried out on the rotary oil seal, the replacement speed of a damaged oil seal is effectively increased, meanwhile, internal reinforcement is carried out on the rotary oil seal, and the use stability of the oil seal is effectively improved.

Description

Technical Field

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

[0002] Rotary oil seals are used when connecting the motor shaft and gearbox. Currently used oil seals require separation of the motor and gearbox for repair and replacement, as the seal is located between them. This process is time-consuming, labor-intensive, and causes prolonged production line downtime, resulting in unnecessary economic losses. Therefore, designing a new type of split-type rotary oil seal for shafts is crucial. For example:

[0003] This invention discloses a rotary oil seal for automobiles, authorized by announcement number CN207715742U. By incorporating a guide sleeve and a pushing device, the rotary oil seal can be assisted in its installation. The pushing device ensures uniform force distribution on the seal, preventing damage to the lip. Furthermore, by setting the outer diameter of the guide sleeve to increase sequentially from front to back, the rotary oil seal is guided to move from front to back, preventing it from impacting the shaft shoulder and damaging the lip during installation. Further, by setting a guide radius, the rotary oil seal can be assisted in entering the journal. Furthermore, by using a threaded tube with an inner diameter larger than the diameter of the rotary shaft head, the threaded tube can be prevented from contacting the rotary shaft head during its forward and backward movement, thus avoiding damage to the shaft head's surface and affecting accuracy. Further, by rotating a lever, the threaded tube and threaded hole work together to push the mounting base and push plate backward. Finally, by setting a limiting ring at one end of the lever, the lever's position is limited, preventing it from slipping out of the through hole.

[0004] Based on existing solutions and actual production and processing, existing rotary oil seals for shafts have the following defects, such as:

[0005] Existing rotary oil seals for shafts prevent the threaded tube from contacting the shaft head, but they are usually one-piece structures, making it difficult to split them to adapt to various applications and inconvenient to replace when the oil seal is damaged. Therefore, this utility model provides a split-type rotary oil seal for shafts to solve the above-mentioned problems. Utility Model Content

[0006] The purpose of this utility model is to provide a split-type rotary oil seal for shafts, in order to solve the problem mentioned in the background art that the existing rotary oil seals for shafts avoid contact between the threaded tube and the shaft head, but are usually of a one-piece structure, making it difficult to split them to adapt to various usage situations, and making it inconvenient to replace the oil seal when it is damaged.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a detachable rotary oil seal for shafts, comprising an oil seal body, a sealing lip provided on the inner side of the oil seal body, a connecting shaft body installed on the inner side of the sealing lip, and a connecting plate provided on the outer side of the connecting shaft body;

[0008] The first mating plate is located on the outside of the oil seal body, and the inside of the oil seal body is provided with a reinforcing structure. The first mating plate has a connecting groove inside, and a second mating plate is installed on the left side of the first mating plate, and a connecting bolt is connected inside the second mating plate.

[0009] Preferably, the sealing lip has a "C" shaped structure, and the sealing lip is symmetrically arranged about the center line of the oil seal body.

[0010] Preferably, the connecting shaft body extends through the interior of the oil seal body, and the connecting shaft body and the connecting plate are connected by threads, and the diameter of the connecting shaft body is smaller than the diameter of the connecting plate.

[0011] Preferably, the oil seal body has a limiting groove inside, and a limiting strip is engaged inside the limiting groove, and the limiting strip has a "C" shaped structure.

[0012] Preferably, the reinforcing structure includes a first metal frame disposed outside the limiting strip, and a connecting frame is vertically connected to the outside of the first metal frame, and a second metal frame is disposed outside the connecting frame in parallel with the first metal frame.

[0013] Preferably, the cross-section of the second metal frame is "C" shaped, and a third metal frame with the same "C" shaped cross-section is installed on the front side of the second metal frame.

[0014] Preferably, both the first mating plate and the second mating plate are "C" shaped, and the first mating plate has connecting grooves at equal intervals inside, and the connecting grooves are threaded with connecting bolts.

[0015] Compared with the prior art, the beneficial effects of this utility model are: the shaft uses a split-type rotary oil seal, which effectively improves the replacement rate of damaged oil seals by designing the rotary oil seal as a split-type unit; at the same time, by internally reinforcing the rotary oil seal, the stability of the oil seal in use is effectively improved.

[0016] 1. It is provided with an oil seal body, a first mating plate and a second mating plate. The first mating plate engages with the right end face of the front and rear oil seal bodies. The inner wall of the second mating plate engages with the left end of the front and rear oil seal bodies. The connecting bolt is screwed on. The second mating plate is connected and reinforced with the front and rear oil seal bodies through the connecting bolt, which facilitates the detachable assembly of the shaft rotary oil seal.

[0017] 2. It is equipped with a connecting shaft body, a dustproof lip and a sealing lip. The connecting shaft body passes through the inside of the oil seal body. The connecting shaft body is tightly connected to the connecting plate, sealing lip and dustproof lip on the inside of the oil seal body. After the sealing lip contacts the connecting shaft body, it seals the outer wall below the contact point with the connecting shaft body. After the dustproof lip contacts the connecting shaft body, it prevents dust from entering the area below the contact point with the connecting shaft body. This facilitates the dustproof sealing function of the split-type rotary oil seal for shaft use.

[0018] 3. A first reinforcing block and a second reinforcing block are provided. The first metal frame and the second metal frame are connected by a connecting frame. The connecting frame is provided with a first reinforcing block and a second reinforcing block with a triangular longitudinal section structure. They engage with the limiting block inside the oil seal body to improve the reinforcement function of the slit-type rotary oil seal for shaft. Attached Figure Description

[0019] Figure 1 This is a frontal cross-sectional view of the present invention.

[0020] Figure 2 This is a schematic diagram of the overall exploded structure of the connection between the third metal frame and the second metal frame of this utility model;

[0021] Figure 3 This is an exploded structural diagram of the connection between the second mating plate and the first mating plate of this utility model;

[0022] Figure 4 This is a schematic diagram of the overall exploded structure of the connection between the sealing lip and the connecting plate of this utility model;

[0023] Figure 5 This utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0024] In the diagram: 1. Oil seal body; 2. Sealing lip; 3. Connecting shaft body; 4. Limiting groove; 5. Limiting strip; 6. First metal frame; 7. Connecting frame; 8. First reinforcing block; 9. Second reinforcing block; 10. Limiting block; 11. Positioning groove; 12. Elastic sheet; 13. Mounting groove; 14. Second metal frame; 15. First mating plate; 16. Second mating plate; 17. Connecting groove; 18. Connecting bolt; 19. Third metal frame; 20. Fourth metal frame; 21. Connecting plate; 22. Dustproof lip. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-5 This utility model provides a technical solution: a detachable rotary oil seal for shafts, comprising an oil seal body 1, a sealing lip 2, a connecting shaft body 3, a limiting groove 4, a limiting strip 5, a first metal frame 6, a connecting frame 7, a first reinforcing block 8, a second reinforcing block 9, a limiting block 10, a positioning groove 11, an elastic sheet 12, a mounting groove 13, a second metal frame 14, a first mating plate 15, a second mating plate 16, a connecting groove 17, a connecting bolt 18, a third metal frame 19, a fourth metal frame 20, a connecting plate 21, and a dustproof lip 22.

[0027] Specific examples Figure 1 and Figure 3 As shown, firstly, two sets of oil seal bodies 1 with the same shape are selected. After the two sets of oil seal bodies 1 are placed stably, one set of oil seal bodies 1 faces forward and the other set of oil seal bodies 1 faces backward. The two sets of oil seal bodies 1 are placed facing each other. The two sets of oil seal bodies 1 are pushed so that the two sets of oil seal bodies 1 come into contact. The rear end of the opening of the front oil seal body 1 comes into contact with the front end of the opening of the rear oil seal body 1. After the edges of the front and rear sets of oil seal bodies 1 come into contact, the first mating plate 15 is placed at the right end of the connection between the front and rear sets of oil seal bodies 1. The first mating plate 15 is in the shape of a "C".

[0028] After the first mating plate 15 is pushed, the first mating plate 15 engages with the right end face of the front and rear oil seal bodies 1. The first mating plate 15 has connecting grooves 17 evenly spaced inside. The connecting bolts 18 are manually screwed into the connecting grooves 17. The connecting bolts 18 have a threaded structure on the outside and pass through the inside of the connecting grooves 17. When the connecting bolts 18 are screwed, the connection gap between the first mating plate 15 and the front oil seal body 1 and between the first mating plate 15 and the rear oil seal body 1 is shortened. The first mating plate 15 and the front oil seal body 1 and the first mating plate 15 and the rear oil seal body 1 are all connected and reinforced by the connecting bolts 18. At this time, the connecting bolts 18 are threadedly connected to the first mating plate 15 and the oil seal bodies 1 on both the front and rear sides.

[0029] Similarly, a second mating plate 16 in the same "C" shape is placed at the left end of the connection between the front and rear oil seal bodies 1. The second mating plate 16 is pushed so that the inner wall of the second mating plate 16 is engaged with the left end of the front and rear oil seal bodies 1. The connecting bolt 18 is manually screwed into the connecting groove 17 opened inside the second mating plate 16. The second mating plate 16 and the front and rear oil seal bodies 1 are connected and reinforced by the connecting bolt 18, which facilitates the detachable assembly of the shaft rotary oil seal.

[0030] Specific examples Figure 1 , Figure 4 and Figure 5 As shown, after the front and rear oil seal bodies 1 are fastened together, an elastic piece 12 is inserted into the mounting groove 13 on the lower side of the oil seal body 1, so that the elastic piece 12 is engaged in the positioning groove 11. The connecting plate 21 connected to the rear oil seal body 1 and the connecting plate 21 connected to the front oil seal body 1 form a ring. Similarly, the dust lip 22 and the sealing lip 2 both form a ring. The sealing lip 2 has a "C" shaped structure. The sealing lip 2 is symmetrically arranged about the front and rear of the ring oil seal body 1. The positions of the sealing lip 2, the connecting plate 21 and the dust lip 22 are respectively set from bottom to top on the inner side of the oil seal body 1. The inner side of the connecting plate 21 is provided with a threaded structure. After the front and rear connecting plates 21 form a ring, the threads between the front and rear connecting plates 21 correspond.

[0031] Next, align the center of the oil seal body 1 with the center of the connecting shaft body 3, so that the connecting shaft body 3 passes through the interior of the oil seal body 1. Rotate the oil seal body 1, and the connecting shaft body 3 first passes through the interior of the sealing lip 2, then connects with the connecting plate 21 via threads, and finally passes through the interior of the dust lip 22. The outer wall of the connecting shaft body 3 rubs against the inner walls of the sealing lip 2, the connecting plate 21, and the dust lip 22. The diameter of the connecting shaft body 3 is smaller than the diameter of the connecting plate 21. After the thread structure on the outside of the connecting shaft body 3 corresponds to the thread structure on the inside of the connecting plate 21... The connecting shaft body 3 is tightly connected to the connecting plate 21, sealing lip 2, and dustproof lip 22 on the inner side of the oil seal body 1. While the connecting shaft body 3 passes through the connecting plate 21, the elastic plate 12 of the positioning groove 11 generates an elastic reaction force, pushing the oil seal body 1 on the inner side of the elastic plate 12 closer to the connecting shaft body 3. At the same time, after the sealing lip 2 contacts the connecting shaft body 3, it seals the outer wall below the contact point with the connecting shaft body 3. After the dustproof lip 22 contacts the connecting shaft body 3, it prevents dust from entering the area below the contact point with the connecting shaft body 3, thus facilitating the dustproof sealing function of the slit-type rotary oil seal for shaft use.

[0032] Specific examples Figure 1 , Figure 2 and Figure 5As shown, when constructing the rotary oil seal, the first metal frame 6 and the second metal frame 14 are placed vertically. Limiting grooves 4 are opened inside the oil seal body 1 on both the front and rear sides. The first metal frame 6 is set inside the second metal frame 14. The limiting strip 5 with a "C" shape structure inside the first metal frame 6 is engaged with the oil seal body 1 on both the front and rear sides through the limiting grooves 4. The first metal frame 6 and the second metal frame 14 are connected by a connecting frame 7.

[0033] Meanwhile, the connecting frame 7 is placed horizontally, perpendicular to the outer side of the first metal frame 6 and the inner side of the second metal frame 14. The cross-sections of the second metal frame 14 and the first metal frame 6 are both "C" shaped, and the diameter of the first metal frame 6 is smaller than the diameter of the second metal frame 14. A third metal frame 19 with the same "C" shaped cross-section is installed on the front side of the second metal frame 14. After the oil seal bodies 1 on the front and rear sides are connected, the first metal frame 6 and the fourth metal frame 20 are connected, and the second metal frame 14 and the third metal frame 19 are connected. The second metal frame 14 is engaged in the oil seal body 1 on the rear side, and the third metal frame 19 is engaged in the oil seal body 1 on the front side. The connecting frame 7, which connects the inner sides of the second metal frame 14 and the third metal frame 19, is provided with a first reinforcing block 8 and a second reinforcing block 9 with a triangular cross-section.

[0034] Inside the rear oil seal body 1, the bottom end of the first reinforcing block 8 is connected to the connecting frame 7, the outer side of the first reinforcing block 8 is connected to the inner wall of the second metal frame 14, the bottom end of the second reinforcing block 9 is connected to the connecting frame 7, and the inner side of the second reinforcing block 9 is connected to the outer wall of the first metal frame 6. Similarly, inside the front oil seal body 1, the bottom end of the first reinforcing block 8 is connected to the connecting frame 7, the outer side of the first reinforcing block 8 is connected to the inner wall of the third metal frame 19, and the bottom end of the second reinforcing block 9 is connected to the connecting frame 7.

[0035] The inner side of the second reinforcing block 9 is connected to the outer wall of the fourth metal frame 20. The first reinforcing block 8 and the second reinforcing block 9 are arranged opposite each other to strengthen the connection between the connecting frame 7 and the first metal frame 6, the connecting frame 7 and the second metal frame 14, the connecting frame 7 and the fourth metal frame 20, and the connecting frame 7 and the third metal frame 19. After the whole consisting of the first metal frame 6, the connecting frame 7 and the second metal frame 14 is installed inside the rear oil seal body 1, the first reinforcing block 8 and the second reinforcing block 9 on the upper side of the connecting frame 7 are engaged with the limiting block 10 inside the rear oil seal body 1. At the same time, after the whole consisting of the third metal frame 19, the connecting frame 7 and the fourth metal frame 20 is installed inside the front oil seal body 1, the first reinforcing block 8 and the second reinforcing block 9 on the upper side of the connecting frame 7 are also engaged with the limiting block 10 inside the front oil seal body 1. This facilitates the reinforcement function of the split-type rotary oil seal for shaft. This is the usage method of the split-type rotary oil seal for shaft.

[0036] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A slidable rotary oil seal for shafts, comprising an oil seal body (1), wherein a sealing lip (2) is provided on the inner side of the oil seal body (1), and a connecting shaft body (3) is installed on the inner side of the sealing lip (2), and a connecting plate (21) is provided on the outer side of the connecting shaft body (3). Its features are, Also includes: The first mating plate (15) is located on the outside of the oil seal body (1), and the inside of the oil seal body (1) is provided with a reinforcing structure. The first mating plate (15) has a connecting groove (17) inside, and a second mating plate (16) is installed on the left side of the first mating plate (15), and a connecting bolt (18) is connected inside the second mating plate (16).

2. The detachable rotary oil seal for shafts according to claim 1, characterized in that: The sealing lip (2) has a "C" shaped structure, and the sealing lip (2) is symmetrically arranged about the center line of the oil seal body (1).

3. A detachable rotary oil seal for shafts according to claim 1, characterized in that: The connecting shaft body (3) penetrates the interior of the oil seal body (1), and the connecting shaft body (3) is connected to the connecting plate (21) by threads, and the diameter of the connecting shaft body (3) is smaller than the diameter of the connecting plate (21).

4. A detachable rotary oil seal for shafts according to claim 1, characterized in that: The oil seal body (1) has a limiting groove (4) inside, and a limiting strip (5) is engaged inside the limiting groove (4), and the limiting strip (5) has a "C" shaped structure.

5. A detachable rotary oil seal for shafts according to claim 1, characterized in that: The reinforcement structure includes a first metal frame (6) disposed outside the limiting strip (5), and a connecting frame (7) is vertically connected to the outside of the first metal frame (6), and a second metal frame (14) is disposed outside the connecting frame (7) in parallel with the first metal frame (6).

6. A detachable rotary oil seal for shafts according to claim 5, characterized in that: The second metal frame (14) has a "C" shaped cross section, and a third metal frame (19) with the same "C" shaped cross section is installed on the front side of the second metal frame (14).

7. A detachable rotary oil seal for shafts according to claim 1, characterized in that: Both the first mating plate (15) and the second mating plate (16) are "C" shaped, and the first mating plate (15) has connecting grooves (17) evenly spaced inside, and the connecting grooves (17) are threaded with connecting bolts (18).

Images