Crankshaft sealing and oil leakage preventing structure

Abstract

The utility model provides a crankshaft sealing oil leakage prevention structure, and relates to the technical field of crankshaft sealing, the crankshaft sealing oil leakage prevention structure comprises a machine body and a crankshaft installed on the machine body, a rear oil seal seat located on the outer side of the crankshaft is further arranged on one side of the machine body, and a rear oil seal is arranged on the side, away from the machine body, of the rear oil seal seat; a rear oil flinger is further arranged on the outer side of the crankshaft and located on the side, opposite to the machine body, of the rear oil seal. After the rear oil flinger is additionally arranged, the workload of the rear oil seal is reduced, and the sealing effect is indirectly achieved.

Description

Technical Field

[0001] The present application relates to the technical field of crankshaft sealing, and in particular to a crankshaft sealing structure to prevent oil leakage. Background Art

[0002] The crankshaft sealing structure in the related technology usually includes a rear oil seal seat installed on the outside of the crankshaft, and a rear oil seal installed on the rear oil seal seat to prevent oil leakage. The crankshaft rear oil seal is an important component in the engine, and its main function is to prevent oil leakage at the rear end of the crankshaft.

[0003] However, the above-mentioned design of using a single oil seal to prevent oil leakage is likely to cause the oil seal to be damaged due to the heavy sealing workload. Summary of the invention

[0004] In order to overcome the problem in the related art that the crankshaft adopts a single oil seal to prevent oil leakage, which easily causes the oil seal to be damaged due to heavy workload, an embodiment of the present application provides a crankshaft seal anti-oil leakage structure. After adding a rear oil slinger pan, the workload of the rear oil seal is reduced and it also indirectly plays a sealing role.

[0005] The technical solution adopted by the embodiment of the present application to solve the technical problem is:

[0006] A crankshaft sealing and oil leakage prevention structure comprises a machine body and a crankshaft mounted thereon, wherein one side of the machine body is provided with a rear oil seal seat located on the outside of the crankshaft, a rear oil seal is provided on the side of the rear oil seal seat away from the machine body, and a rear oil slinger pan is provided on the outside of the crankshaft on the side opposite to the rear oil seal and the machine body.

[0007] Furthermore, the rear oil-slinging pan includes a pan body A located on the inner side and having an L-shaped cross section and a pan body B located on the outer side and having a U-shaped cross section. The pan body A and the pan body B are fixedly connected, and the outer side edge of the pan body B is also designed to be inclined outward.

[0008] Furthermore, the inner side of the disc body A is also provided with an inner toothed rubber ring which is tightly fitted on the outer side of the crankshaft.

[0009] Furthermore, the rear oil seal seat includes a seat body A located on the outside and a seat body B located on the inside, the seat body A and the seat body B are detachably fixed, and the seat body A is connected to one side of the machine body, and a connecting plate with an L-shaped cross-section is fixed to the inside of the seat body B, and the connecting plate does not contact the crankshaft.

[0010] Furthermore, the outer diameter of the outer side of the disk body B is smaller than the inner diameter of the seat body A.

[0011] Furthermore, one side of the rear oil seal is clamped on the inner end of the connecting plate and is tightly attached to the outer side of the crankshaft, and the other side of the rear oil seal penetrates into the gap between the connecting plate and the seat body B.

[0012] Furthermore, a thrust block is provided at the connection between the engine body and the crankshaft.

[0013] The advantage of the embodiment of the present application is that after adding the rear oil-slinging pan, the workload of the rear oil seal is reduced and it also indirectly plays a sealing role. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of a three-dimensional structure of a crankshaft sealing and oil leakage prevention structure provided in an embodiment of the present application after being cut open;

[0015] Figure 2 Provided for the implementation of this application Figure 1 Schematic diagram of the plane structure;

[0016] Figure 3 Provided for the implementation of this application Figure 2 A partial enlarged view of the middle part;

[0017] Figure 4 Provided for the implementation of this application Figure 1 A partial enlarged view of point B in the middle.

[0018] In the figure: 1-machine body; 2-crankshaft; 3-rear oil seal seat; 31-seat body A; 32-seat body B; 33-connecting plate; 4-rear oil seal; 5-rear oil slinger pan; 51-pan body A; 52-pan body B; 53-inner toothed rubber ring; 6-thrust block. DETAILED DESCRIPTION

[0019] The technical solution in the embodiment of the present application is to solve the problem that the crankshaft in the related art adopts a single oil seal to prevent oil leakage, which easily causes the oil seal to be damaged due to heavy workload. The overall idea is as follows:

[0020] Embodiment 1:

[0021] like Figure 1-Figure 4 As shown, a crankshaft sealing and anti-oil leakage structure includes a body 1 and a crankshaft 2 installed thereon, a rear oil seal seat 3 located on the outside of the crankshaft 2 is also provided on one side of the body 1, a rear oil seal 4 is provided on the side of the rear oil seal seat 3 away from the body 1, and a rear oil slinger pan 5 is also provided on the outside of the crankshaft 2 at the side opposite to the rear oil seal 4 and the body 1.

[0022] In this embodiment, after the rear oil-slinging pan 5 is added, the workload of the rear oil seal 4 is reduced, and it also indirectly plays a sealing role.

[0023] The rear oil sling pan 5 includes a pan body A51 located on the inner side and having an L-shaped cross section and a pan body B52 located on the outer side and having a U-shaped cross section. The pan body A51 and the pan body B52 are fixedly connected, and the outer side of the pan body B52 is also designed to be inclined outward. Specifically, the rear oil sling pan 5 after the pan body A51 and the pan body B52 are combined is designed to be bowl-shaped. During the operation of the crankshaft 2, the axial oil will be thrown to the outer edge of the rear oil sling pan 5 by centrifugal force after hitting the rear oil sling pan 5, away from the axis of the crankshaft 2, thereby reducing the workload of the rear oil seal 4 and indirectly playing a sealing role.

[0024] The inner side of the disc body A51 is also provided with an inner toothed rubber ring 53 which is tightly sleeved on the outer side of the crankshaft 2. The inner toothed rubber ring 53 is tightly attached to the outer side of the crankshaft 2 to form multiple oil barriers, thereby reducing the probability of the axial oil of the crankshaft 2 leaking out from the gap between the two.

[0025] The rear oil seal seat 3 includes a seat body A31 located on the outside and a seat body B32 located on the inside. The seat body A31 and the seat body B32 are detachably fixed, and the seat body A31 is connected to one side of the body 1. A connecting plate 33 with an L-shaped cross section is fixed to the inside of the seat body B32, and the connecting plate 33 does not contact the crankshaft 2. Specifically, the seat body A31 and the seat body B32 are fixed by bolts, which is not only convenient for disassembly of the two, but also convenient for disassembly of the rear oil seal 4, and indirectly convenient for disassembly of the rear oil slinger 5, so that the sealing structure of the present application is more convenient for disassembly.

[0026] It should be noted that if Figure 1 As shown, the outer diameter of the outer side of the disk body B52 is smaller than the inner diameter of the seat body A31.

[0027] One side of the rear oil seal 4 is clamped on the inner end of the connecting plate 33 and is closely attached to the outer side of the crankshaft 2, and the other side of the rear oil seal 4 extends into the gap between the connecting plate 33 and the seat body B32. Figure 4 As shown, the cross-section of the rear oil seal 4 on one side close to the crankshaft 2 is designed in an H-shape, forming two axial sealing structures of the crankshaft 2, which improves the sealing performance. The other end of the rear oil seal 4 is fixed in the gap between the connecting plate 33 and the seat body B32, which increases the contact area between the rear oil seal 4 and the rear oil seal seat 3 and improves the connection stability.

[0028] The connection between the engine body 1 and the crankshaft 2 is also provided with a thrust piece 6. The thrust piece 6 prevents the axial movement of the crankshaft 2, thereby maintaining the normal operation of the connecting rod piston.

[0029] When used in this application:

[0030] During the operation of the crankshaft 2, the axial oil hits the rear oil-slinging pan 5 and is thrown to its outer edge by centrifugal force, away from the axis of the crankshaft 2. This reduces the workload of the rear oil seal 4 and also indirectly plays a sealing role.

[0031] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present application, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present application.

Claims

1. A crankshaft sealing and oil leakage prevention structure, comprising a body (1) and a crankshaft (2) mounted thereon, characterized in that: A rear oil seal seat (3) located outside the crankshaft (2) is also provided on one side of the machine body (1); a rear oil seal (4) is provided on the side of the rear oil seal seat (3) away from the machine body (1); and a rear oil slinger (5) is also provided on the outside of the crankshaft (2) on the side opposite to the rear oil seal (4) and the machine body (1).

2. The crankshaft sealing and oil leakage prevention structure according to claim 1, characterized in that: The rear oil-slinging pan (5) comprises a pan body A (51) located on the inner side and having an L-shaped cross section, and a pan body B (52) located on the outer side and having a U-shaped cross section. The pan body A (51) and the pan body B (52) are fixedly connected, and the outer side edge of the pan body B (52) is also designed to be inclined outward.

3. The crankshaft sealing and oil leakage prevention structure according to claim 2, characterized in that: The inner side of the disc body A (51) is also provided with an inner toothed rubber ring (53) which is tightly sleeved on the outer side of the crankshaft (2).

4. The crankshaft sealing and oil leakage prevention structure according to claim 3, characterized in that: The rear oil seal seat (3) comprises a seat body A (31) located on the outside and a seat body B (32) located on the inside, the seat body A (31) and the seat body B (32) are detachably fixed, and the seat body A (31) is connected to one side of the machine body (1), and a connecting plate (33) with an L-shaped cross section is fixed on the inside of the seat body B (32), and the connecting plate (33) does not contact the crankshaft (2).

5. The crankshaft sealing and oil leakage prevention structure according to claim 4, characterized in that: The outer diameter of the outer side of the disk body B (52) is smaller than the inner diameter of the seat body A (31).

6. The crankshaft sealing and oil leakage prevention structure according to claim 4, characterized in that: One side of the rear oil seal (4) is clamped on the inner end of the connecting plate (33) and is closely attached to the outer side of the crankshaft (2), while the other side of the rear oil seal (4) extends deep into the gap between the connecting plate (33) and the seat body B (32).

7. The crankshaft sealing and oil leakage prevention structure according to claim 1, characterized in that: A thrust block (6) is also provided at the connection between the machine body (1) and the crankshaft (2).

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