Tool for disassembling engine oil seal

Abstract

The utility model relates to the related technical field of mechanical maintenance, in particular to a tool for disassembling an engine oil seal, which comprises a fixed plate and a long-rod bolt in threaded connection with the fixed plate, the threaded piece is arranged at one end of the long-rod bolt; the two ejector rods are arranged on the fixing plate, the ejector rods are located on the side, close to a threaded part, of the fixing plate, the two ejector rods are located on the two sides of a long-rod bolt correspondingly and symmetrically arranged, and the two ejector rods are driven to move through a driving assembly arranged on the fixing plate. The oil seal can be conveniently taken down from the oil seal installation hole, meanwhile, the oil seal can be evenly stressed in the taking-out process, the ejector rod and the long-rod bolt cannot make contact with the inner wall of the oil seal installation hole, and the inner wall of the oil seal installation hole is prevented from being mechanically scratched.

Description

Technical Field

[0001] This utility model relates to a tool for disassembling and assembling oil seals, and more particularly to a tool for disassembling engine oil seals, belonging to the technical field of mechanical maintenance. Background Technology

[0002] Oil seals, an indispensable part of mechanical components, primarily prevent lubricating oil leakage, protecting the normal operation of the machine. In automotive engines, oil seals prevent lubricating oil from leaking from critical engine parts, ensuring the normal operation of the engine's internal lubrication system. Because oil seals typically operate under harsh conditions—large temperature differences, high dust levels, and frequent machine vibrations causing constantly changing stress conditions on components—they often lead to incomplete sealing. Incomplete sealing is a major cause of oil leaks, therefore, frequent inspection, maintenance, and replacement are necessary.

[0003] There are no dedicated tools for removing oil seals in the current technology. In particular, when removing oil seals in automobile OEMs or auto repair shops, flathead screwdrivers are generally used. This method not only causes irreversible damage to the oil seal, but is also cumbersome and requires a lot of force to break the oil seal. If the operation is not done properly, mechanical scratches may be caused on the inner wall of the oil seal mounting hole and on the shaft diameter, so that the newly installed oil seal cannot achieve the sealing effect, causing unnecessary trouble and losses, and affecting the quality of oil seal assembly. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a tool for removing engine oil seals that facilitates non-destructive removal of the oil seal from the oil seal mounting hole.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] A tool for disassembling an engine oil seal includes: a fixed plate and a long bolt threaded onto the fixed plate; a threaded component disposed on one end of the long bolt, which is screwed into the inner ring of the oil seal by rotating the long bolt; and two push rods disposed on the fixed plate, the push rods being located on the side of the fixed plate near the threaded component, the two push rods being symmetrically arranged on both sides of the long bolt, and the two push rods being driven to move by a drive assembly disposed on the fixed plate.

[0007] Furthermore, the fixing plate has two sliding grooves, which are symmetrically arranged on both sides of the long bolt. A sliding block is slidably connected in the sliding groove, and the top rod is connected to the sliding block on the side near the threaded part.

[0008] Furthermore, a connecting block is connected to the sliding block, and the driving assembly consists of a bidirectional threaded rod rotatably connected to a fixed plate and a wheel connected to one end of the bidirectional threaded rod. The connecting block is threadedly connected to the bidirectional threaded rod.

[0009] Furthermore, the threaded component is a tapered threaded component in the shape of a frustum cone, and the cross-sectional diameter of the end of the threaded component near the long bolt is greater than the cross-sectional diameter of the end of the threaded component away from the long bolt.

[0010] Furthermore, a connecting spline is connected to one end of the long bolt, and a snap-fit ​​groove corresponding to the connecting spline is provided on the threaded part, and the snap-fit ​​groove is movably connected to the connecting spline.

[0011] Furthermore, a fastening bolt is connected to the end of the connecting spline away from the long bolt, and the fastening bolt is provided with a nut that contacts the threaded part connected to the connecting spline.

[0012] Furthermore, the end of the top rod away from the sliding block is provided with a snap-fit ​​part with a hook-shaped structure.

[0013] Furthermore, a sleeve is connected to the end of the long bolt away from the connecting spline, and the central axis of the sleeve is perpendicular to the central axis of the long bolt.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This invention uses a push rod and threaded parts to securely connect the oil seal. The oil seal can be removed from the oil seal mounting hole by pulling the fixing plate. During this process, the push rod pulls the outer ring of the oil seal, and the threaded parts pull the inner ring of the oil seal, ensuring that the oil seal is subjected to uniform force during removal. Neither the push rod nor the long bolt will touch the inner wall of the oil seal mounting hole, avoiding mechanical scratches on the inner wall of the oil seal mounting hole. Compared with using a flathead screwdriver to pry it open, this structure is simpler and more convenient to use, avoiding damage to the oil seal mounting hole. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the isometric structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the device of this utility model when disassembling the oil seal;

[0018] Figure 3 This utility model Figure 2 Schematic diagram of a local structure in the middle;

[0019] Figure 4 This is an exploded view of part of the structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the top rod and the snap-fit ​​part of this utility model.

[0021] In the diagram, 1. Fixed plate; 101. Slide groove; 102. Sliding block; 2. Long rod bolt; 3. Threaded part; 4. Top rod; 5. Connecting block; 6. Double threaded rod; 7. Rotary wheel; 8. Connecting spline; 9. Snap-fit ​​groove; 10. Fastening bolt; 11. Nut; 12. Snap-fit ​​part; 13. Sleeve; 21. Oil seal mounting hole; 22. Oil seal inner ring; 23. Groove. Detailed Implementation

[0022] The technical solution of this utility model will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0023] like Figures 1-5 As shown, the tool for disassembling the engine oil seal provided in this embodiment includes a fixing plate 1, a long rod bolt 2 threadedly connected to the fixing plate 1, a threaded part 3 provided on one end of the long rod bolt 2, and two push rods 4 provided on the fixing plate 1. Specifically, by rotating the long rod bolt 2, the threaded part 3 is screwed into the inner ring 22 of the oil seal. The push rods 4 are located on the side of the fixing plate 1 near the threaded part 3. The two push rods 4 are located on both sides of the long rod bolt 2 and are symmetrically arranged. The two push rods 4 are driven to move by a drive assembly provided on the fixing plate 1. In order to facilitate the push rods 4 to be inserted into the groove 23 of the oil seal, a hook-shaped locking part 12 is provided on the end of the push rod 4 away from the sliding block 102, so that the end of the push rod 4 with the locking part 12 can be inserted into the groove 23 of the oil seal.

[0024] In use, adjust the distance between the two push rods 4 according to the diameter of the oil seal to be removed using the drive assembly. Position the fixing plate 1 directly opposite the location of the oil seal, and then align the snap-fit ​​part 12 of the push rod 4 with the groove 23 of the oil seal. Using the drive assembly, increase the distance between the two push rods 4 so that the snap-fit ​​part 12 on the push rod 4 is tightly fitted into the groove 23 of the oil seal. Then, rotate the long bolt 2, causing the threaded part 3 to gradually approach the location of the oil seal. One end of the threaded part 3 gradually screws into the inner ring of the oil seal, and under the action of the threads, it finally latches onto the oil seal. The push rod 4 and the threaded part 3 work together to achieve this. When used, the oil seal is firmly connected; pulling the fixing plate 1 moves the push rod 4, the long rod bolt 2, and the threaded part 3, causing the oil seal to be removed from the oil seal mounting hole 21. During this process, the push rod 4 pulls the outer ring of the oil seal, while the threaded part 3 pulls the inner ring of the oil seal, so that the oil seal is subjected to more even force when it is removed. Neither the push rod 4 nor the long rod bolt 2 touches the inner wall of the oil seal mounting hole 21, avoiding mechanical scratches on the inner wall of the oil seal mounting hole 21. Compared with using a flathead screwdriver to pry it, this structure is simpler and more convenient to use, and avoids damage to the oil seal mounting hole 21.

[0025] In this technical solution, the oil seal targeted is the existing skeleton oil seal, such as... Figure 2 As shown, the oil seal mainly includes an inner ring 22 that contacts the bearing and a groove 23 formed on the body. The main body of the oil seal is mostly made of soft rubber. The specific usage and detailed structure are not described in detail.

[0026] Among them, such as Figure 1 As shown, in order to facilitate the relative movement between the two push rods 4, two sliding grooves 101 are provided on the fixed plate 1. The two sliding grooves 101 are symmetrically arranged on both sides of the long rod bolt 2. A sliding block 102 is slidably connected in the sliding groove 101. The push rod 4 is connected to the side of the sliding block 102 near the threaded part 3. The push rod 4 can be moved by moving the sliding block 102, thereby adjusting the distance between the two push rods 4 locking parts 12 to accommodate oil seals of different diameters.

[0027] For the relative movement of the two sliding blocks 102 and for fixing the two sliding blocks 102, such as Figure 1As shown, a connecting block 5 is fixedly connected to the sliding block 102; the driving assembly consists of a bidirectional threaded rod 6 rotatably connected to the fixed plate 1 and a rotating wheel 7 connected to one end of the bidirectional threaded rod 6. The connecting block 5 is threadedly connected to the bidirectional threaded rod 6. The bidirectional bolt rod is rotated by manually driving the rotating wheel 7. Since the two connecting blocks 5 are connected to different threads at both ends of the bidirectional thread, the rotating bidirectional thread will drive the two connecting blocks 5 to move towards or away from each other. The specific direction of movement is determined by the clockwise direction of the bidirectional thread. When the driving assembly is used, considering the adaptability of the scenario, the rotation is driven manually. The rotation of the bidirectional thread can be changed according to the specific actual use scenario, and a suitable driving method can be selected. This application does not limit this.

[0028] Furthermore, to facilitate the screwing of the threaded part 3 into the inner ring of the oil seal, the threaded part 3 is preferably a conical threaded part 3 with a frustum shape, and the cross-sectional diameter of the end of the threaded part 3 near the long rod bolt 2 is larger than the cross-sectional diameter of the end of the threaded part 3 away from the long rod bolt 2. When the threaded part 3 is screwed into the oil seal, the end of the threaded part 3 with a smaller cross-sectional diameter enters the inner ring 22 of the oil seal first. As the threaded part 3 continues to penetrate into the inner ring of the oil seal, the end of the threaded part 3 with a larger cross-sectional diameter will gradually come into contact with the inner ring 22 of the oil seal, and the conical thread teeth on the threaded part 3 will cut into the inner ring 22 of the oil seal and gradually tighten and screw onto the oil seal.

[0029] Furthermore, since the diameters of oil seals vary, the diameters of their inner rings also differ. Therefore, it is necessary to select a suitable threaded component 3 based on the inner ring of the oil seal. To facilitate the replacement of the threaded component 3, a connecting spline 8 is connected to one end of the long rod bolt 2. The threaded component 3 has a corresponding snap-fit ​​groove 9 on the connecting spline 8, and the snap-fit ​​groove 9 is movably connected to the connecting spline 8. When replacing the threaded component 3, it is only necessary to remove the threaded component 3 from the connecting spline 8 and replace it. The structural features of the connecting spline 8 prevent the threaded component 3 from rotating on the long rod thread when subjected to torsional force.

[0030] In order to fix the threaded part 3 to the connecting spline 8, a fastening bolt 10 is connected to the end of the connecting spline 8 away from the long bolt 2. The fastening bolt 10 is provided with a nut 11 and the nut 11 contacts the threaded part 3 connected to the connecting spline 8. When the threaded part 3 is replaced, the nut 11 is removed from the fastening bolt 10. After the threaded part 3 is replaced, the nut 11 is reinstalled on the fastening bolt 10.

[0031] To facilitate the rotation of the long bolt 2, a sleeve 13 is connected to the end of the long bolt 2 away from the connecting spline 8. The central axis of the sleeve 13 is perpendicular to the central axis of the long bolt 2. The sleeve 13 is a hollow cylindrical structure with both ends open. When rotating the long bolt 2, the sleeve 13 can be used to hold the long bolt 2 and rotate it. In actual use, inserting a metal rod into the sleeve 13 can enhance the convenience of rotating the long bolt 2.

[0032] The foregoing description illustrates and describes preferred embodiments of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein. Any modifications and variations made by those skilled in the art without departing from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A tool for dismounting an engine oil seal, characterized in that: The utility model relates to a kind of long rod bolt locking device, including: Fixed plate (1) and long rod bolt (2) threaded on fixed plate (1); Threaded part (3) is arranged on the one end of the long rod bolt (2); Two top rods (4) are arranged on the fixed plate (1), the top rod (4) is located on the side of the fixed plate (1) close to threaded part (3), two top rods (4) are respectively located on the two sides of long rod bolt (2) and symmetrically arranged, and two top rods (4) are driven to move by drive assembly arranged on fixed plate (1).

2. The tool of claim 1, wherein: Two sliding grooves (101) are opened on the fixed plate (1), two sliding grooves (101) are symmetrically arranged on the two sides of long rod bolt (2), sliding block (102) is slidably connected in the sliding groove (101), and the top rod (4) is connected at the position of the side of sliding block (102) close to threaded part (3).

3. The tool of claim 2, wherein: The sliding block (102) is fixedly connected with the connecting block (5), the drive assembly is composed of the bidirectional screw rod (6) rotatably connected on the fixed plate (1) and the rotating wheel (7) connected on one end of the bidirectional screw rod (6), and the connecting block (5) is threaded on the bidirectional screw rod (6).

4. The tool of claim 1, wherein: The threaded part (3) is conical threaded part (3) of truncated cone, and the cross-sectional diameter of the end of the threaded part (3) close to long rod bolt (2) is greater than the cross-sectional diameter of the end of the threaded part (3) away from long rod bolt (2).

5. The tool of claim 1, wherein: One end of the long rod bolt (2) is connected with the connecting spline (8), the threaded part (3) is provided with the clamping groove (9) corresponding to the connecting spline (8), and the clamping groove (9) is movably connected with the connecting spline (8).

6. The tool of claim 5, wherein: The end of the connecting spline (8) away from the long rod bolt (2) is connected with the fastening bolt (10), the fastening bolt (10) is provided with the nut (11), and the nut (11) is in contact with the threaded part (3) connected to the connecting spline (8).

7. The tool of claim 1, wherein: The end of the top rod (4) away from the sliding block (102) is provided with the clamping part (12) with hook structure.

8. The tool of claim 1, wherein: The end of the long rod bolt (2) away from the connecting spline (8) is connected with the sleeve (13), and the central axis of the sleeve (13) is perpendicular to the central axis of the long rod bolt (2).

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