A mounting tool for a crankshaft rear oil seal

Abstract

The utility model discloses a kind of installation tools of crankshaft rear oil seal, belong to oil seal installation technical field, comprising: crankshaft and the rear flange connected with the rear end of crankshaft;Multiple flywheel mounting holes are opened in the end of rear flange away from crankshaft, and the side of rear flange away from crankshaft is equipped with support disc by flywheel mounting hole, the center of the end of support disc away from rear flange is rotatably connected with support arm, and the outside of rear flange is equipped with oil seal ring, the utility model is stably installed in the outside of rear flange by flywheel mounting hole with support disc, subsequently by adjusting to the outside of oil seal ring to extrusion structure, then by the rotation of support arm, drive extrusion structure to rotate in the outside of oil seal ring, uniformly force extrusion is carried out to oil seal ring, so that oil seal ring is evenly stressed after installation is completed, avoid oil seal ring partial uneven stress to cause deformation and easily occur leakage, and simultaneously, the device can also be adapted to the installation of different size crankshaft rear oil seal.

Description

Technical Field

[0001] This utility model relates to the field of oil seal installation technology, specifically to an installation tool for a crankshaft rear oil seal. Background Technology

[0002] Crankshaft oil seals play a crucial sealing role in automobile engines. They are mainly used to seal the gap between the crankshaft and the engine housing, preventing oil leakage and the entry of dust, moisture, and other impurities. The rear crankshaft oil seal is located at the connection between the crankshaft and the transmission, preventing oil leakage into the transmission and affecting its normal operation.

[0003] The traditional method of installing oil seals involves manual installation followed by tapping to tighten the seal. Because the manual operation during traditional oil seal installation results in different tapping forces at different points, it affects the force balance of the oil seal and makes it prone to leakage during later use. Utility Model Content

[0004] The purpose of this utility model is to provide an installation tool for a crankshaft rear oil seal. A support plate is installed through the flywheel mounting hole on the rear flange, and then the extrusion structure is installed using the rotatable support arm on the support plate. The extrusion structure is rotated to uniformly extrude the oil seal ring, and then the pressure of the extrusion structure on the oil seal ring is gradually adjusted to complete the installation of the oil seal ring, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an installation tool for a crankshaft rear oil seal, comprising:

[0006] Crankshaft and rear end flange connected to the rear end of crankshaft;

[0007] The rear flange has multiple sets of flywheel mounting holes at the end away from the crankshaft. A support plate is mounted on the side of the rear flange away from the crankshaft through the flywheel mounting holes. A support arm is rotatably connected to the center of the end of the support plate away from the rear flange. An oil seal ring is sleeved on the outer side of the rear flange. An extrusion structure for assisting in the installation of the oil seal ring is movably mounted on the support arm.

[0008] Preferably, the extrusion structure includes a movable block, a threaded sleeve is rotatably connected to the center of the movable block via a bearing, a threaded rod is threadedly connected to the inner cavity of the threaded sleeve, a turntable is fixed to the end of the threaded sleeve away from the rear flange, and an installation frame is fixed to the end of the threaded rod near the oil seal ring. Two sets of pressure rollers are rotatably connected to the inner cavity of the installation frame via a bearing.

[0009] Preferably, the support plate has elongated countersunk holes on both sides of the end away from the rear flange, and mounting bolts are movably disposed in the elongated countersunk holes. The mounting bolts pass through the elongated countersunk holes and are threadedly connected to the flywheel mounting holes.

[0010] Preferably, the support arm has two sets of guide grooves symmetrically formed, the movable block is slidably disposed in the guide groove, the end of the movable block near the rear flange is fixed with a limiting plate that fits the support arm, and the end of the movable block away from the limiting plate is fixed with an external threaded cylinder sleeved on the outside of the threaded sleeve, the external threaded cylinder extends to the outside of the guide groove and is threadedly connected with a locking nut.

[0011] Preferably, the mounting frame has limit seats fixed on both sides, and the limit seats slide against the outside of the support arm.

[0012] Preferably, a connecting shaft is fixed at the center of the support arm, one end of the connecting shaft is rotatably connected to the center of the support disk through a bearing, and the other end of the connecting shaft is fixed with a handle.

[0013] Preferably, an annular limiting ring is fixed on the support plate, and a limiting groove is provided on the side of the support arm that is in contact with the support plate to cooperate with the limiting ring.

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

[0015] 1. This utility model uses the flywheel mounting hole to stably install the support plate on the outside of the rear flange. Then, by adjusting the extrusion structure to the outside of the oil seal ring, the rotation of the support arm drives the extrusion structure to rotate on the outside of the oil seal ring, so that the oil seal ring is evenly compressed. This ensures that the oil seal ring is evenly stressed after installation, avoiding uneven stress on the oil seal ring which can lead to deformation and leakage. At the same time, this device can also be adapted to the installation of rear oil seals of crankshafts of different sizes.

[0016] 2. This utility model prevents the support arm from deforming when supported by the compression structure by the cooperation of the limiting ring and the limiting groove, which would cause the support arm to separate from the support plate and affect the uniformity of the force on the oil seal ring. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the partially disassembled three-dimensional structure of this utility model;

[0019] Figure 3 This is a three-dimensional structural diagram of the support arm of this utility model;

[0020] Figure 4This is a three-dimensional structural diagram of the extrusion structure of this utility model.

[0021] The following are the labeling elements in the diagram: 1. Crankshaft; 2. Rear end flange; 3. Flywheel mounting hole; 4. Support plate; 5. Support arm; 6. Oil seal ring; 7. Extrusion structure; 71. Moving block; 72. Threaded sleeve; 73. Threaded rod; 74. Turntable; 75. Mounting frame; 76. Pressure roller; 8. Long countersunk hole; 9. Mounting bolt; 10. Guide groove; 11. Limiting plate; 12. External threaded cylinder; 13. Lock nut; 14. Limiting seat; 15. Connecting shaft; 16. Handle; 17. Limiting ring; 18. Limiting groove. Detailed Implementation

[0022] 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.

[0023] This utility model provides, for example Figures 1-4 The crankshaft rear oil seal installation tool shown includes:

[0024] Crankshaft 1 and rear end flange 2 connected to the rear end of crankshaft 1;

[0025] Multiple sets of flywheel mounting holes 3 are provided at the end of the rear flange 2 away from the crankshaft 1. A support plate 4 is installed on the side of the rear flange 2 away from the crankshaft 1 through the flywheel mounting holes 3. A support arm 5 is rotatably connected at the center of the end of the support plate 4 away from the rear flange 2. An oil seal ring 6 is sleeved on the outer side of the rear flange 2. An extrusion structure 7 for assisting in the installation of the oil seal ring 6 is movably installed on the support arm 5.

[0026] The support plate 4 is stably installed on the outside of the rear flange 2 through the flywheel mounting hole 3. Then, the extrusion structure 7 is adjusted to the outside of the oil seal ring 6. Then, by rotating the support arm 5, the extrusion structure 7 is driven to rotate on the outside of the oil seal ring 6, and the oil seal ring 6 is evenly compressed. This ensures that the oil seal ring 6 is evenly stressed after installation, avoiding uneven stress on the oil seal ring 6, which can lead to deformation and leakage. At the same time, this device can also be adapted to the installation of oil seals on crankshafts 1 of different sizes.

[0027] Among them, such as Figure 4 As shown:

[0028] The extrusion structure 7 includes a movable block 71. A threaded sleeve 72 is rotatably connected to the center of the movable block 71 via a bearing. A threaded rod 73 is threadedly connected to the inner cavity of the threaded sleeve 72. A turntable 74 is fixed to the end of the threaded sleeve 72 away from the rear flange 2. An installation frame 75 is fixed to the end of the threaded rod 73 near the oil seal ring 6. Two sets of pressure rollers 76 are rotatably connected to the inner cavity of the installation frame 75 via a bearing. The threaded sleeve 72 is installed by the movable block 71. Then, the turntable 74 drives the threaded sleeve 72 to rotate, causing the threaded rod 73 to move telescopically within the inner cavity of the threaded sleeve 72, thereby adjusting the position of the installation frame 75 so that the pressure rollers 76 fit against the oil seal ring 6. At the same time, when the support arm 5 drives the threaded rod 73 to rotate, the pressure rollers 76 can avoid damage to the oil seal ring 6, ensuring the integrity of the oil seal ring 6. This avoids the damage to the oil seal ring 6 caused by the traditional method of hammering during installation.

[0029] Furthermore, such as Figure 2 As shown:

[0030] The support plate 4 has elongated countersunk holes 8 on both sides of the end away from the rear flange 2. The mounting bolts 9 are movably installed in the elongated countersunk holes 8. The mounting bolts 9 pass through the elongated countersunk holes 8 and are threadedly connected to the flywheel mounting holes 3. By setting the elongated countersunk holes 8, not only can the flywheel mounting holes 3 on the rear flange 2 of different sizes be connected, but the mounting bolts 9 can also be stored to prevent the mounting bolts 9 from affecting the rotation of the support arm 5 when the support arm 5 rotates.

[0031] Preferred, such as Figure 3-4 As shown:

[0032] Two sets of guide grooves 10 are symmetrically provided on the support arm 5. The movable block 71 is slidably disposed in the guide groove 10. The end of the movable block 71 near the rear flange 2 is fixed with a limiting plate 11 that fits the support arm 5. The end of the movable block 71 away from the limiting plate 11 is fixed with an external threaded cylinder 12 that is sleeved on the outside of the threaded sleeve 72. The external threaded cylinder 12 extends to the outside of the guide groove 10 and is threadedly connected with a locking nut 13. The opening of the guide groove 10 facilitates the movement of the movable block 71 in the guide groove 10, thereby adjusting the position of the pressure roller 76 according to the size of the oil seal ring 6. At the same time, the locking nut 13 rotates on the outside of the external threaded cylinder 12, and works with the limiting plate 11 to limit and fix the movable block 71, maintaining the stability of the position of the threaded rod 73.

[0033] It is worth noting that, such as Figure 3 As shown:

[0034] Limit seats 14 are fixed on both sides of the mounting frame 75. The limit seats 14 slide against the outside of the support arm 5. The limit seats 14 are set to limit the mounting frame 75 and prevent the mounting frame 75 from rotating with the rotation of the threaded rod 73, which would prevent the threaded rod 73 from extending and retracting inside the threaded sleeve 72.

[0035] In a further preferred embodiment, such as Figure 1-3 As shown:

[0036] A connecting shaft 15 is fixed at the center of the support arm 5. One end of the connecting shaft 15 is rotatably connected to the center of the support plate 4 through a bearing. The other end of the connecting shaft 15 is fixed with a handle 16. The connecting shaft 15 facilitates the rotatable connection between the support plate 4 and the support arm 5. At the same time, the handle 16 can drive the support arm 5 to rotate, thereby driving the pressure roller 76 to rotate around the connecting shaft 15, thus applying pressure to install the oil seal ring 6.

[0037] In addition, such as Figure 1-3 As shown:

[0038] A ring-shaped limiting ring 17 is fixed on the support plate 4. A limiting groove 18 is opened on the side of the support arm 5 that is in contact with the support plate 4 to cooperate with the limiting ring 17. Through the cooperation of the limiting ring 17 and the limiting groove 18, the support arm 5 is prevented from deforming when supported by the compression structure 7, which would cause the support arm 5 to separate from the support plate 4 and affect the uniformity of the force on the oil seal ring 6.

[0039] In practical use, simply slip the oil seal ring 6 onto the rear flange 2, then align the support plate 4 with the rear flange 2 at the end of the crankshaft 1. Next, use the mounting bolt 9 to pass through the elongated countersunk hole 8 and thread it into the mounting hole to stably install the support plate 4 onto the rear flange 2. Then, based on the size of the oil seal ring 6, the pressure roller 76 is positioned outside the oil seal ring 6, allowing the movable block 71 to slide within the guide groove 10. Finally, rotate the locking nut 13, causing it to rotate outside the external threaded cylinder 12, and through the limiting plate 11, stably install the movable block 71 within the guide groove 10. Then, the turntable 74 is rotated, causing the threaded sleeve 72 to rotate. The rotation of the threaded sleeve 72 drives the threaded rod 73 to move inside the threaded sleeve 72. Then, the threaded rod 73 drives the mounting frame 75 and the pressure roller 76 to approach the oil seal ring 6. When the pressure roller 76 applies a certain pressure to the oil seal ring 6, the handle 16 is rotated. The handle 16 and the connecting shaft 15 drive the support arm 5 to rotate outside the support plate 4. Then, the pressure roller 76 applies pressure around the oil seal ring 6 to install the oil seal ring 6. After installation, the oil seal ring 6 is subjected to uniform force in all places, which can play a good sealing role.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tool for installing a crankshaft rear oil seal, characterized in that, include: Crankshaft (1) and rear end flange (2) connected to the rear end of crankshaft (1); The rear flange (2) has multiple sets of flywheel mounting holes (3) at the end away from the crankshaft (1). A support plate (4) is installed on the side of the rear flange (2) away from the crankshaft (1) through the flywheel mounting holes (3). A support arm (5) is rotatably connected at the center of the end of the support plate (4) away from the rear flange (2). An oil seal ring (6) is sleeved on the outer side of the rear flange (2). An extrusion structure (7) for assisting in the installation of the oil seal ring (6) is movably installed on the support arm (5).

2. The crankshaft rear oil seal installation tool according to claim 1, characterized in that: The extrusion structure (7) includes a movable block (71), and a threaded sleeve (72) is rotatably connected to the center of the movable block (71) via a bearing. A threaded rod (73) is threadedly connected to the inner cavity of the threaded sleeve (72). A turntable (74) is fixed to one end of the threaded sleeve (72) away from the rear flange (2). A mounting frame (75) is fixed to one end of the threaded rod (73) near the oil seal ring (6). Two sets of pressure rollers (76) are rotatably connected to the inner cavity of the mounting frame (75) via a bearing.

3. The crankshaft rear oil seal installation tool according to claim 1, characterized in that: The support plate (4) has elongated countersunk holes (8) on both sides of the end away from the rear flange (2). An installation bolt (9) is movably installed in the elongated countersunk hole (8). The installation bolt (9) passes through the elongated countersunk hole (8) and is threadedly connected to the flywheel mounting hole (3).

4. The crankshaft rear oil seal installation tool according to claim 2, characterized in that: Two sets of guide grooves (10) are symmetrically provided on the support arm (5). The movable block (71) is slidably disposed in the guide groove (10). A limiting plate (11) that fits the support arm (5) is fixed at one end of the movable block (71) near the rear flange (2). An external threaded cylinder (12) sleeved on the outside of the threaded sleeve (72) is fixed at one end of the movable block (71) away from the limiting plate (11). The external threaded cylinder (12) extends to the outside of the guide groove (10) and is threadedly connected to a locking nut (13).

5. The crankshaft rear oil seal installation tool according to claim 2, characterized in that: Limit seats (14) are fixed on both sides of the mounting frame (75), and the limit seats (14) slide against the outside of the support arm (5).

6. The crankshaft rear oil seal installation tool according to claim 1, characterized in that: A connecting shaft (15) is fixed at the center of the support arm (5). One end of the connecting shaft (15) is rotatably connected to the center of the support disk (4) through a bearing. The other end of the connecting shaft (15) is fixed with a handle (16).

7. The crankshaft rear oil seal installation tool according to claim 1, characterized in that: The support plate (4) is fixed with an annular limiting ring (17), and the support arm (5) has a limiting groove (18) on one side that fits against the support plate (4) to cooperate with the limiting ring (17).

Images