External oil seal device

Abstract

The utility model relates to the technical field of oil seal external arrangement, in particular to an oil seal external arrangement device which comprises a box body, and a sealing sleeve body is fixedly connected to the outer surface of the box body. When the oil seal is used, the oil seal is sleeved in the rotating shaft, the protrusion on the cover plate is pressed in the penetration groove, after the cover plate reaches the limiting groove, the cover plate is pressed and rotated by 90 degrees, so that the protrusion of the cover plate is clamped in the concave part of the limiting groove, pressing of the cover plate is stopped, the cover plate is clamped in the limiting groove under the pushing action of the first spring, and the oil seal is fixed. The two pressing blocks are pressed oppositely, the third spring is driven to be compressed, the clamping block is driven to be hidden into the extrusion block, the threaded protruding block is screwed into the threaded groove, the threaded protruding block gradually abuts against the annular strip, compresses the second spring, abuts against the cover plate and then abuts against the oil seal, the pressing blocks are loosened when the proper pressing degree is reached, the third spring is reset, the clamping block is clamped into the clamping groove, and fixing of the pressing assembly is completed. And reverse operation is performed during disassembly, and the damaged oil seal is convenient to replace through the arrangement of the pressing assembly capable of being simply assembled and disassembled.

Description

Technical Field

[0001] This utility model relates to the field of external oil seal technology, specifically an external oil seal device. Background Technology

[0002] External oil seals are sealing devices used to seal rotating shafts or reciprocating motion components. They are installed outside the component being sealed and typically consist of multiple parts to achieve better sealing performance and functionality. In the hydraulic and lubrication systems of various machine tools, construction machinery, and mining machinery, they are used to seal the rotating shafts of equipment such as oil pumps, cylinders, and reducers to prevent hydraulic oil and lubricating oil leakage. They are also commonly used to seal crankshafts, camshafts, and transmission input / output shafts in automobile engines, ensuring the sealing performance of engine lubricating oil and transmission fluid, and improving the reliability and durability of automobiles. Furthermore, in chemical production equipment such as reaction vessels, pumps, and compressors, they are used to seal rotating shafts or reciprocating motion components containing corrosive or toxic media to prevent media leakage that could cause safety accidents and environmental pollution.

[0003] A search revealed a Chinese utility model patent, CN212717904U, which discloses an external oil seal device for a pumping unit gearbox. This device includes an external oil seal, comprising a sealing ring for gripping the output shaft; a clamping structure, including a fixed bracket fixedly connected to the gearbox housing or oil seal cover, and a clamping member mounted on the fixed bracket. The clamping member applies axial pressure directly or indirectly to the sealing ring to press it against the oil seal cover, sealing the oil leakage gap between the oil seal cover and the output shaft. By arranging the external oil seal and clamping structure outside the gearbox, the problem of lubricating oil leakage is solved from the outside of the gearbox, eliminating the need to disassemble the entire gearbox or replace a failed oil seal. The sealing ring is constantly pushed by the moving body to seal the leak. Technicians can control the deformation of the sealing ring to ensure the sealing effect, which helps improve the oil leakage problem. Furthermore, since no operation of the original gearbox is required, maintenance efficiency is improved, and downtime is shortened.

[0004] However, the device lacks the function of easily replacing the oil seal. When in use, the device is fixedly connected to the gearbox housing and the oil seal cover, so the fixed bracket must be removed first when the oil seal needs to be replaced, which is complicated and increases time costs. Utility Model Content

[0005] The purpose of this invention is to provide an external oil seal device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An external oil seal device includes a housing, a sealing sleeve fixedly connected to the outer surface of the housing, a rotating shaft inserted inside the sealing sleeve, an oil seal sleeved on the outer surface of the rotating shaft near the housing, a spring abutting against the side of the oil seal away from the housing, a cover plate fixedly connected to the end of the spring abutting away from the oil seal, a spring two fixedly connected to the side of the cover plate away from the oil seal, a ring fixedly connected to the end of the spring two away from the cover plate, a pressing assembly slidably connected to the outer surface of the ring, and a sealing sleeve slidably connected to the outer surface of the pressing assembly.

[0008] Preferably, the clamping assembly includes a threaded protrusion with an annular groove. A ring bar is slidably connected to the inner wall of the annular groove. A pressing block is fixedly connected to the side of the threaded protrusion away from the ring bar. A pressing groove is formed on the side of the pressing block away from the threaded protrusion. A spring three is fixedly connected to the inner wall of the pressing groove. A pressing block is fixedly connected to the end of the spring three away from the bottom wall of the pressing groove. A circular groove is formed on the inner wall of the pressing groove. A spring four is inserted into the circular groove. A locking block is fixedly connected to the end of the spring four away from the circular groove.

[0009] Preferably, the inner wall of the sealing sleeve near the locking block is provided with a plurality of locking grooves, and the locking block is slidably connected to the inner wall of one of the plurality of locking grooves. The inner wall of the sealing sleeve near the threaded protrusion is provided with a threaded groove, and the threaded protrusion is slidably connected to the inner wall of the threaded groove.

[0010] Preferably, a limiting groove is formed on the inner wall of the sealing sleeve near the cover plate, and an inlet groove is formed on the inner wall of the limiting groove.

[0011] Preferably, a viewing groove is provided on the side of the sealing sleeve near the oil seal, and a transparent viewing block is fixedly connected to the inner wall of the viewing groove.

[0012] Preferably, a sealing ring one is fixedly connected to the edge of the oil seal near the cover plate, and a sealing ring two is fixedly connected to the edge of the transparent viewing block near the viewing groove.

[0013] Preferably, the two sets of slots are arranged according to the thread direction of the threaded protrusions.

[0014] Preferably, the two sets of actuating blocks are symmetrically distributed on both sides of the rotating shaft.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This external oil seal device, consisting of a sealing sleeve, an oil seal body, a cover plate, and a clamping assembly, is used as follows: First, the oil seal is inserted into the rotating shaft. The protrusion on the cover plate is aligned with the groove and pressed in. After the cover plate reaches the limiting groove, the cover plate is pressed down and rotated 90 degrees, causing the protrusion of the cover plate to engage with the recessed part of the limiting groove. When the pressing of the cover plate is stopped, the cover plate is clamped in the limiting groove under the pushing action of the first spring, fixing the oil seal. Pressing the two pressing blocks in opposite directions compresses the third spring, causing the locking block to hide in the squeezing block, and screwing the threaded protrusion into the threaded groove. The threaded protrusion gradually presses against the ring bar and compresses the second spring, pressing against the cover plate and then against the oil seal. When the appropriate tightness is reached, the pressing blocks are released, the third spring returns, and the locking block engages with the locking groove, completing the fixing of the clamping assembly. Disassembly is performed by reversing the operation. The design of the clamping assembly allows for easy installation and disassembly, facilitating the replacement of damaged oil seals.

[0017] 2. This external oil seal device, through the setting of a transparent viewing block, allows observation of the connection between the oil seal and the rotating shaft during use. When there is a leakage of liquid medium, it can be detected in time through the transparent viewing block, allowing the machine to stop operation and replace the oil seal, thus preventing excessive leakage of liquid medium and resulting in a decline in machine performance. Attached Figure Description

[0018] Figure 1 This is a cross-sectional schematic diagram of the sealing sleeve of this utility model.

[0019] Figure 2 This is a schematic diagram showing the disassembled sealing sleeve and oil seal body of this utility model;

[0020] Figure 3 This is a schematic diagram showing the disassembled ring and threaded protrusion of this utility model;

[0021] Figure 4 This is a schematic diagram of the clamping component of this utility model;

[0022] Figure 5 This is a schematic diagram of the installation of the sealing sleeve and transparent viewing block of this utility model.

[0023] In the diagram: 1. Housing; 2. Sealing sleeve; 3. Rotating shaft; 4. Oil seal body; 5. Spring 1; 6. Cover plate; 7. Spring 2; 8. Ring bar; 9. Pressing assembly; 10. Threaded protrusion; 11. Ring groove; 12. Extrusion block; 13. Pressing groove; 14. Spring 3; 15. Pressing block; 16. Circular groove; 17. Spring 4; 18. Locking block; 19. Locking groove; 20. Threaded groove; 21. Limiting groove; 22. Insertion groove; 23. Viewing groove; 24. Transparent viewing block; 25. Sealing ring 1; 26. Sealing ring 2. Detailed Implementation

[0024] 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.

[0025] Please see Figures 1-5 As shown, this utility model provides a technical solution:

[0026] An external oil seal device includes a housing 1. A sealing sleeve 2 is fixedly connected to the outer surface of the housing 1. A rotating shaft 3 is inserted inside the sealing sleeve 2. An oil seal body 4 is sleeved on the rotating shaft 3 near the outer surface of the housing 1. A spring 5 abuts against the side of the oil seal body 4 away from the housing 1. A cover plate 6 is fixedly connected to the end of the spring 5 away from the oil seal body 4. A spring 7 is fixedly connected to the side of the cover plate 6 away from the oil seal body 4. A ring 8 is fixedly connected to the end of the spring 7 away from the cover plate 6. A pressing assembly 9 is slidably connected to the outer surface of the ring 8. The sealing sleeve 2 is slidably connected to the outer surface of the pressing assembly 9. In use, first, the oil seal body 4 is inserted into the rotating shaft 3. Then, the protrusion on the cover plate 6 is aligned with the groove 22 and pressed in. After the cover plate 6 reaches the limiting groove 21, the cover plate 6 is pressed down and rotated 90 degrees. When the protrusion of the cover plate 6 is engaged with the recessed part of the limiting groove 21, and the pressing of the cover plate 6 is stopped, the cover plate 6 is locked in the limiting groove 21 under the pushing action of the spring 5, fixing the oil seal body 4. Press the two push blocks 15 in opposite directions, driving the spring 3 14 to compress, driving the locking block 18 to hide in the squeezing block 12, and screwing the threaded protrusion 10 into the threaded groove 20. The threaded protrusion 10 gradually presses against the ring bar 8 and compresses the spring 2 7, pressing against the cover plate 6 and then against the oil seal body 4. When the appropriate tightness is reached, release the push block 15, the spring 3 14 resets, and the locking block 18 is engaged in the locking groove 19, completing the fixing of the clamping component 9. Disassembly is done in reverse. The setting of easy installation and disassembly of the clamping component 9 makes it convenient to replace the damaged oil seal body 4, shortens the time for replacing the oil seal body 4, and ensures the normal working time of the machine.

[0027] In this embodiment, preferably, the pressing assembly 9 includes a threaded protrusion 10, an annular groove 11 is formed on the threaded protrusion 10, an annular bar 8 is slidably connected to the inner wall of the annular groove 11, a pressing block 12 is fixedly connected to the side of the threaded protrusion 10 away from the annular bar 8, a pressing groove 13 is formed on the side of the pressing block 12 away from the threaded protrusion 10, a spring 14 is fixedly connected to the inner wall of the pressing groove 13, a pressing block 15 is fixedly connected to the end of the spring 14 away from the bottom wall of the pressing groove 13, a circular groove 16 is formed on the inner wall of the pressing groove 13, a spring 17 is inserted into the circular groove 16, and a locking block 18 is fixedly connected to the end of the spring 17 away from the circular groove 16. When in use, press the two push blocks 15 in opposite directions to compress the spring 14, causing the locking block 18 to be hidden in the squeezing block 12, and screw the threaded protrusion 10 into the threaded groove 20. The threaded protrusion 10 gradually presses against the ring bar 8 and compresses the spring 7, presses against the cover plate 6 and then against the oil seal body 4. When the appropriate tightness is reached, release the push blocks 15, and the spring 14 resets. The locking block 18 is then locked into the slot 19, completing the fixation of the clamping component 9. When disassembling, the operation is reversed. The setting of the clamping component 9, which facilitates disassembly and installation, makes the oil seal body 4 squeezed and tightly attached to the sealing sleeve 2, thereby improving the sealing performance between the rotating shaft 3 and the entire external device of the oil seal body 4.

[0028] In this embodiment, preferably, the inner wall of the sealing sleeve 2 near the locking block 18 is provided with a plurality of locking grooves 19, and the locking block 18 is slidably connected to the inner wall of one of the plurality of locking grooves 19. The inner wall of the sealing sleeve 2 near the threaded protrusion 10 is provided with a threaded groove 20, and the threaded protrusion 10 is slidably connected to the inner wall of the threaded groove 20. In use, the installation and removal of the threaded protrusion 10 are achieved by engaging the threaded protrusion on its surface with the threaded groove on the sealing sleeve 2. The tightening degree between the pressing component 9 and the oil seal body 4 is adjusted by screwing in the thread. Compared with directly pushing the pressing component 9, it is more stable and firm. After the pressing component 9 is rotated to the appropriate position, the position between it and the sealing sleeve 2 is limited by the locking block 18 engaging the locking groove 19, which firmly fixes the pressing component 9, ensures that the oil seal body 4 is tightly attached to the sealing sleeve 2, and ensures the sealing performance of the device.

[0029] In this embodiment, preferably, a limiting groove 21 is provided on the inner wall of the sealing sleeve 2 near the cover plate 6, and an inlet groove 22 is provided on the inner wall of the limiting groove 21. In use, the oil seal body 4 is first put into the rotating shaft 3, and the protrusion on the cover plate 6 is aligned with the inlet groove 22 and pressed in. After the cover plate 6 reaches the limiting groove 21, the cover plate 6 is pressed and rotated 90 degrees so that the protrusion of the cover plate 6 is engaged in the recessed part of the limiting groove 21. When the pressing of the cover plate 6 is stopped, the cover plate 6 is locked in the limiting groove 21 under the pushing action of the spring 5, fixing the oil seal body 4. The main function of the cover plate 6 here is to fix the oil seal body 4 and prevent the oil seal body 4 from being displaced during operation.

[0030] In this embodiment, preferably, a viewing groove 23 is provided on the side of the sealing sleeve 2 near the oil seal body 4, and a transparent viewing block 24 is fixedly connected to the inner wall of the viewing groove 23. In use, the part connecting the oil seal body 4 and the rotating shaft 3 can be observed through the transparent viewing block 24. When there is leakage of liquid medium, it can be detected in time through the transparent viewing block 24, the machine can be stopped and the oil seal body 4 can be replaced, so as to avoid excessive leakage of liquid medium and thus reduce the performance of the machine.

[0031] In this embodiment, preferably, a sealing ring 25 is fixedly connected to the edge of the oil seal body 4 near the cover plate 6, and a sealing ring 26 is fixedly connected to the edge of the transparent viewing block 24 near the viewing groove 23. In use, the sealing ring 25 seals the oil seal body 4 and the sealing sleeve 2, while the sealing ring 26 seals the transparent viewing block 24 and the sealing sleeve 2, thereby improving the overall sealing performance of the device.

[0032] In this embodiment, preferably, the two sets of slots 19 are arranged according to the thread direction of the threaded protrusion 10. When in use, since the threaded protrusion 10 is fixedly connected to the pressing block 12, when the threaded protrusion 10 is screwed into the sealing sleeve 2, the pressing block 12 also rotates and moves forward. Every time the threaded protrusion 10 rotates a small segment, the position of the locking block 18 is displaced in both the horizontal and vertical directions. Therefore, the slots 19 are arranged according to the direction of the threaded groove 20, which makes it convenient to fix the pressing component 9 at any time.

[0033] In this embodiment, preferably, the two sets of push blocks 15 are symmetrically distributed on both sides of the rotating shaft 3. When in use, the two push blocks 15 are pressed in opposite directions, which drives the spring 3 14 to compress and causes the locking block 18 to hide in the squeezing block 12. The threaded protrusion 10 is screwed into the threaded groove 20. The threaded protrusion 10 gradually presses against the ring bar 8 and compresses the spring 2 7, presses against the cover plate 6 and then presses against the oil seal body 4. When the appropriate tightness is reached, the push blocks 15 are released, the spring 3 14 resets, and the locking block 18 is locked into the slot 19, thus completing the fixation of the clamping component 9. Disassembly is performed in reverse. The two push blocks 15 are symmetrically arranged, which makes it convenient for the staff to press the two push blocks 15 in opposite directions with their thumb and forefinger, making the operation simple.

[0034] Working principle: In this embodiment of the external oil seal device, when in use, first put the oil seal body 4 into the rotating shaft 3, align the protrusion on the cover plate 6 with the groove 22 and press it in. After the cover plate 6 reaches the limiting groove 21, press the cover plate 6 and rotate the cover plate 6 ninety degrees so that the protrusion of the cover plate 6 is engaged in the recessed part of the limiting groove 21. Stop pressing the cover plate 6, and under the pushing action of the spring 5, the cover plate 6 is locked in the limiting groove 21, fixing the oil seal body 4. Press the two push blocks 15 in opposite directions, drive the spring 14 to compress, drive the locking block 18 to hide in the squeezing block 12, and screw the threaded protrusion 10 into the threaded groove 20. The threaded protrusion 10 gradually presses against the ring bar 8 and compresses the spring 7, presses against the cover plate 6 and then against the oil seal body 4. When the appropriate tightness is reached, release the push block 15, the spring 14 resets the locking block 18 and engages the locking groove 19, completing the fixing of the clamping component 9. Disassembly is done in reverse.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An external oil seal device, characterized in that: The enclosure includes a housing (1), a sealing sleeve (2) is fixedly connected to the outer surface of the housing (1), a rotating shaft (3) is inserted inside the sealing sleeve (2), an oil seal body (4) is sleeved on the outer surface of the rotating shaft (3) near the housing (1), a spring (5) is abutted on the side of the oil seal body (4) away from the housing (1), a cover plate (6) is fixedly connected to the end of the spring (5) away from the oil seal body (4), a spring (7) is fixedly connected to the side of the cover plate (6) away from the oil seal body (4), a ring (8) is fixedly connected to the end of the spring (7) away from the cover plate (6), a pressing assembly (9) is slidably connected to the outer surface of the ring (8), and a sealing sleeve (2) is slidably connected to the outer surface of the pressing assembly (9).

2. The external oil seal device according to claim 1, characterized in that: The clamping assembly (9) includes a threaded protrusion (10), an annular groove (11) is provided on the threaded protrusion (10), an annular bar (8) is slidably connected to the inner wall of the annular groove (11), a pressing block (12) is fixedly connected to the side of the threaded protrusion (10) away from the annular bar (8), a pressing groove (13) is provided on the side of the pressing block (12) away from the threaded protrusion (10), a spring three (14) is fixedly connected to the inner wall of the pressing groove (13), a pressing block (15) is fixedly connected to the end of the spring three (14) away from the bottom wall of the pressing groove (13), a circular groove (16) is provided on the inner wall of the pressing groove (13), a spring four (17) is inserted into the circular groove (16), and a locking block (18) is fixedly connected to the end of the spring four (17) away from the circular groove (16).

3. The external oil seal device according to claim 1, characterized in that: The sealing sleeve (2) has several slots (19) on its inner wall near the card block (18), and the card block (18) is slidably connected to the inner wall of one of the slots (19). The sealing sleeve (2) has a threaded groove (20) on its inner wall near the threaded protrusion (10), and the threaded protrusion (10) is slidably connected to the inner wall of the threaded groove (20).

4. The external oil seal device according to claim 1, characterized in that: The sealing sleeve (2) has a limiting groove (21) on its inner wall near the cover plate (6), and the inner wall of the limiting groove (21) has an inlet groove (22).

5. The external oil seal device according to claim 1, characterized in that: The sealing sleeve (2) has a viewing groove (23) on the side near the oil seal body (4), and a transparent viewing block (24) is fixedly connected to the inner wall of the viewing groove (23).

6. The external oil seal device according to claim 5, characterized in that: A sealing ring 1 (25) is fixedly connected to the edge of the oil seal body (4) near the cover plate (6), and a sealing ring 2 (26) is fixedly connected to the edge of the transparent viewing block (24) near the viewing groove (23).

7. The external oil seal device according to claim 3, characterized in that: The two sets of slots (19) are arranged in the thread direction of the threaded protrusions (10).

8. The external oil seal device according to claim 2, characterized in that: The two sets of push blocks (15) are symmetrically distributed on both sides of the rotating shaft (3).

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