CN217107246U - Crankcase sealing device - Google Patents

Abstract

The utility model relates to a bent axle field, in particular to crankcase sealing device. Wherein, be provided with the bent axle in the crankcase, above-mentioned crankcase sealing device includes retainer plate, sealing ring and fender oil fan, and the retainer plate is connected with the crankcase, and the tip of bent axle penetrates the retainer plate, and the sealing ring is connected between bent axle global and retainer plate, and the sealing ring can rotate for the retainer plate with the bent axle synchronous phase, keeps off oil fan and is connected with the bent axle and can rotate along with the bent axle to make the oil mist move towards keeping away from sealing ring one side. Through setting the sealing ring to rotate along with the bent axle, and then there is the clearance between sealing ring and the retainer plate, reduced the wearing and tearing of sealing ring and retainer plate, simultaneously, keep off oily fan and can rotate along with the bent axle, keep off oily fan itself and can block that most oil mist enters into sealing device's clearance, in addition, the fan can rotate along with the bent axle, and the wind-force of production can blow the oil mist to the one end of keeping away from the sealing ring, and then has improved sealed effect.

Description

Crankcase sealing device

Technical Field

The utility model relates to a bent axle field, in particular to crankcase sealing device.

Background

The crankshaft is widely applied to various engines as a commonly used transmission part at present, the engine comprises a crankcase, the crankshaft is arranged in the crankcase and drives wheels outside the crankcase to rotate, the crankcase is a fixed part, and the crankshaft is a rotating part.

The crankshaft is in a high-rotation state during operation, so that the lubricating effect of engine oil can be avoided due to abrasion, part of the engine oil can be changed into an oil mist state and can be filled into the whole crankcase during the operation of the crankshaft, and a sealing piece is arranged between the crankshaft and the crankcase for avoiding the overflow of the oil mist. In the prior art, the sealing element is fixedly connected with the crankcase and is in contact with the circumferential surface of the crankshaft, so that when the crankshaft runs at a high speed, the sealing element and the crankshaft are abraded greatly, and parts are required to be replaced frequently. And if the seal is not in contact with the crankshaft, oil mist in the crankcase may be caused to escape the crankcase through the gap between the seal and the crankshaft.

In order to solve the above problems, it is necessary to develop a crankcase sealing device.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a crankcase sealing device can reduce sealing ring and mounting, and sealed effectual.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a crankcase sealing device, is provided with the bent axle in the crankcase, above-mentioned crankcase sealing device includes:

a fixed ring connected with the crankcase, wherein the end of the crankshaft penetrates into the fixed ring;

a seal ring fixedly connected to the crankshaft and at least partially located between a circumferential surface of the crankshaft and the stationary ring with a gap therebetween;

and the oil blocking fan is connected with the crankshaft and can rotate along with the crankshaft so as to enable the oil mist to move towards the side far away from the sealing ring.

Optionally, the sealing ring includes a mounting portion and a blocking portion, and the mounting portion and the blocking portion intersect and form an included angle;

the fixing ring comprises a mounting hole for the end part of the crankshaft to penetrate through and an inner end face located inside the crankcase, the circumferential surface of the mounting hole is arranged opposite to the mounting part, and the blocking part is arranged opposite to the inner end face.

Optionally, an included angle between the mounting portion and the blocking portion ranges from 30 ° to 60 °.

Optionally, a plurality of first through grooves extending in the circumferential direction are formed in the circumferential surface of the mounting hole, the plurality of first through grooves are arranged at intervals in the axial direction of the crankshaft, a plurality of second through grooves are formed in the mounting portion, and each first through groove is arranged opposite to one second through groove.

Optionally, the lower end of the fixing ring is radially provided with a plurality of return pipes penetrating through the fixing ring, and each return pipe is correspondingly communicated with one first through groove.

Optionally, the oil blocking fan is mounted on the sealing ring.

Optionally, the oil blocking fan includes a main body portion and a plurality of fan blades arranged along a circumferential direction of the crankshaft, the main body portion is a revolving body sleeved on the crankshaft, a generatrix of the revolving body forms an included angle with an axis of the crankshaft, and the fan blades are bent and formed from the main body portion toward a side away from the sealing ring.

Optionally, the sealing ring is made of a grey cast iron material.

Alternatively, the seal ring is fitted to the crankshaft with a gap therebetween, and a flexible member is provided between the seal ring and the circumferential surface of the crankshaft, the flexible member sealing the seal ring and the circumferential surface of the crankshaft.

Optionally, a counter bore is formed in the circumferential surface of the crankshaft, a counter bore extending along an axis is formed in an end surface of the sealing ring located on the inner side of the crankcase, and the counter bore is communicated with the counter bore;

the crankcase sealing device further comprises a positioning pin, and the positioning pin is inserted into the counter bore and extends into the counter bore.

The beneficial effects of the utility model reside in that:

the utility model provides a crankcase sealing device, through setting up the sealing ring to rotate along with the crankshaft, and make and have the clearance between fixed ring and the sealing ring, in the course of crankshaft rotation, has reduced the wearing and tearing of sealing ring and fixed ring, so the change frequency of spare part can be greatly reduced, thus has reduced the use cost; simultaneously, keep off the oil fan and can rotate along with the bent axle, on the one hand, keep off oil fan itself and can block that most oil mist enters into sealing device's clearance, in addition, the fan is along with bent axle pivoted in-process, and the wind-force of production can blow the oil mist to the one end of keeping away from the sealing ring to prevent that the oil mist from entering into the clearance of sealing ring and retainer plate and overflowing the crankcase, and then improved sealed effect. The utility model discloses a crankcase sealing device, not only the wearing and tearing of sealing ring are few, and sealed effectual.

Drawings

FIG. 1 is an isometric view of a crankcase seal provided by an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a crankcase seal provided by an embodiment of the present invention;

FIG. 3 is an enlarged view of FIG. 2 at A;

fig. 4 is an isometric view of a retaining ring provided by an embodiment of the present invention.

In the figure:

1. a stationary ring; 11. mounting holes; 12. an inner end surface; 13. a return pipe; 14. a first through groove;

2. a seal ring; 21. an installation part; 211. a second through groove; 22. a blocking portion; 23. sinking a groove; 24. a third through groove;

3. an oil-blocking fan; 31. a body portion; 32. a fan blade;

4. a flexible member;

5. positioning pins;

6. a crankshaft; 61. a counter bore;

7. and (4) screws.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", and the like are used based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplification of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The crankcase is located in the lower part of the engine cylinder and is used for mounting the crankshaft 6, and the crankcase is divided into an upper crankcase and a lower crankcase. The upper crankcase is integrally cast with the cylinder block, and the lower crankcase is used for storing lubricating oil and closing the upper crankcase, and the crankcases in the embodiment are all referred to as the lower crankcase. The crankcase is the most important part in the engine, bears the force transmitted by the connecting rod, converts the force into torque, outputs the torque through the crankshaft 6 and drives other accessories on the engine to work; the crankcase stores engine oil, and the prevention of the engine oil leakage of the crankshaft 6 is one of important factors for ensuring the normal operation of the crankcase.

The crankshaft 6 is arranged in a crankcase, a fixed ring 1 is arranged on the crankcase, and the end part of the crankshaft 6 penetrates into the fixed ring 1. In order to solve the above problems, as shown in fig. 1 and 2, the present embodiment provides a crankcase sealing device, which further includes a sealing ring 2, the sealing ring 2 is fixedly connected to a crankshaft 6, at least a portion of the sealing ring 2 is located between a circumferential surface of the crankshaft 6 and a fixing ring 1, and a gap is formed between the sealing ring 2 and the fixing ring 1.

Through setting sealing ring 2 to with 6 fixed connection of bent axle, and then sealing ring 2 rotates along with bent axle 6 synchronization, do not have relative motion between sealing ring 2 and the bent axle 6 promptly, bent axle 6 can not cause wearing and tearing to sealing ring 2, and there is the clearance between sealing ring 2 and the retainer plate 1, the event drives sealing ring 2 rotation in-process at bent axle 6, retainer plate 1 is also very little to the wearing and tearing of sealing ring 2, thereby solved sealing ring 2 and rotated the easy wearing and tearing of in-process at bent axle 6 and need the problem of frequent renewal part.

Preferably, the crankcase sealing device further comprises an oil blocking fan 3, the oil blocking fan 3 being connected to the crankshaft 6 and being rotatable with the crankshaft 6 for moving the oil mist towards the side remote from the sealing ring 2. Through keeping off oily fan 3's setting, keep off oily fan 3 itself and can block that most oil mist enters into sealing device's clearance, simultaneously, keep off oily fan 3 and can rotate along with bent axle 6, the wind-force of production can blow the oil mist to the one end of keeping away from sealing ring 2 to prevent that the oil mist from entering into the clearance of sealing ring 2 and retainer plate 1 and overflowing the crankcase, and then improved sealed effect.

Optionally, as shown in fig. 1, the oil retaining fan 3 includes a main body portion 31 and a plurality of fan blades 32 arranged along the circumferential direction of the crankshaft 6, the main body portion 31 is a revolving body sleeved on the crankshaft 6, a generatrix of the revolving body and an axis of the crankshaft 6 form an included angle, and the fan blades 32 are formed by bending the main body portion 31 towards a side away from the sealing ring 2. The fan blade 32 is formed in a simple manner, and the blocking area of the body 31 can be reserved, so that the body 31 has a large area to block oil stains; meanwhile, the fan blades 32 generate axial wind when the oil blocking fan 3 rotates with the crankshaft 6, and blow the oil mist to the side away from the seal ring 2. In this embodiment, the included angle between the generatrix of the main body 31 and the axis of the crankshaft 6 is 90 °.

Preferably, the oil deflector fan 3 is mounted on the sealing ring 2. On the one hand, oil mist can be better prevented from entering the sealing ring 2; on the other hand, can avoid setting up the connection structure who keeps off oily fan 3 on bent axle 6, guarantee bent axle 6's structural strength and be more convenient for go on to the processing of sealing ring 2. In other embodiments, the oil blocking fan 3 may be directly fixed to the crankshaft 6 as needed.

Preferably, as shown in fig. 2 and 4, the sealing ring 2 includes a mounting portion 21 and a blocking portion 22, the mounting portion 21 and the blocking portion 22 intersect and are arranged at an included angle, the fixing ring 1 includes a mounting hole 11 for the end of the crankshaft 6 to penetrate through and an inner end surface 12 located inside the crankcase, the peripheral surface of the mounting hole 11 is arranged opposite to the mounting portion 21, and the blocking portion 22 is arranged opposite to the inner end surface 12, so as to form a gap between the sealing ring 2 and the fixing ring 1. On the one hand, the setting of blocking part 22 can play the effect that blocks to the oil mist, and on the other hand, the installation department 21 that is the contained angle setting and blocking part 22 increase the oil mist and spill over the tortuous degree of route to sealing effect between sealing ring 2 and retainer plate 1 has been improved.

Preferably, the angle between the mounting portion 21 and the blocking portion 22 ranges from 30 ° to 60 °. The oil mist can be blocked, and the oil mist falling onto the surface of the blocking part 22 can be guided to the direction far away from the fixing ring 1. In this embodiment, the angle between the mounting portion 21 and the blocking portion 22 is 45 °.

Alternatively, as shown in fig. 2 and 3, a plurality of screws 7 are circumferentially arranged at the intersection of the mounting portion 21 and the blocking portion 22, and the screws 7 are used to fix the oil deflector fan 3 to the seal ring 2.

Preferably, as shown in fig. 2, a plurality of second through grooves 211 extending in the circumferential direction are provided on a circumferential surface of the mounting portion 21 opposite to the stationary ring 1, the plurality of second through grooves 211 are provided at intervals in the axial direction of the crankshaft 6, correspondingly, a plurality of first through grooves 14 extending in the circumferential direction are opened on a circumferential surface of the mounting hole 11, and each first through groove 14 is provided opposite to one second through groove 211 and forms an accommodation space. By arranging the first through groove 14 and the second through groove 211, on one hand, the tortuous degree of a path when oil mist overflows is increased, and the sealing effect is improved; on the other hand, when the oil mist passes through the accommodating space, the pressure of the oil mist is reduced and the impact force is reduced, and the oil mist can be liquefied and deposited in the accommodating space, so that the oil mist is less prone to overflow from the gap between the sealing ring 2 and the fixing ring 1.

Further, in the present embodiment, as shown in fig. 2, the number of the first through grooves 14 and the second through grooves 211 is three, the cross section of the first through groove 14 is open, and the cross section of the second through groove 211 is open and semicircular. In other embodiments, only one first through groove 14 and only one second through groove 211 may be provided, which may also achieve the effects of increasing the tortuosity of the oil mist overflow path and relieving pressure, or more oil mist overflow grooves may be provided according to the oil outlet amount, and the number is not limited herein. The cross-sectional shapes of the first through groove 14 and the second through groove 211 may be both circular or both rectangular, and may also be other shapes that can be processed, and the specific number and the cross-sectional shape of the through grooves may be set according to an actual use situation, which is not limited herein. It should be noted that, the arrangement of the first through groove 14 and the second through groove 211 belongs to a structure of a labyrinth seal, and more structures of the labyrinth seal can be replaced in the present solution, and since the development form of the labyrinth seal is more and is a well-known introduction, the description is not repeated here.

Preferably, as shown in fig. 2, the lower end of the fixing ring 1 is provided with a plurality of return pipes 13 penetrating through the fixing ring 1 along the radial direction, each return pipe 13 is correspondingly communicated with one first through groove 14, the return pipes 13 are communicated with the accommodating space, and correspondingly, the number of the return pipes 13 is adaptively adjusted according to the number of the first through grooves 14. The plurality of return pipes 13 are disposed in correspondence with the accommodation space, and the liquefied oil deposited in the accommodation space can be discharged through the manifold ring. Further, the return pipe 13 is communicated with the inside of the crankcase, so that oil flows back to the crankcase, the circulation utilization of lubricating oil is realized, and waste is avoided.

Preferably, the sealing ring 2 is a thin-walled member with a thickness of 10mm or less. When the sealing ring 2 generates heat when the crankshaft 6 rotates at a high speed, the deformation of the sealing ring 2 is not too large, so that the sealing ring 2 is contacted with the fixing ring 1 to cause irreversible abrasion.

Preferably, the sealing ring 2 is made of grey cast iron material. In this embodiment, the seal ring 2 is made of HT250 material, and HT250 represents

The lowest tensile strength of the sample is 250MPa, the material is high in hardness and free of obvious yield strength, the sealing ring 2 is guaranteed not to deform in the installation and transportation process, installation is facilitated, and installation accuracy is guaranteed.

Alternatively, as shown in fig. 2, the sealing ring 2 is sleeved on the crankshaft 6 and provided with a gap, the flexible member 4 is provided between the sealing ring 2 and the circumferential surface of the crankshaft 6, and the sealing ring 2 and the circumferential surface of the crankshaft 6 are sealed by the flexible member 4. Because the crankshaft 6 and the sealing ring 2 are both rigid and the crankshaft 6 and the sealing ring 2 do not move relatively, a gap of 0.1mm is reserved between the crankshaft 6 and the sealing ring 2 after installation, and the flexible piece 4 can ensure complete sealing between the sealing ring 2 and the crankshaft 6.

Alternatively, as shown in fig. 2, the flexible member 4 is an O-ring, which is made of rubber and has a good sealing effect.

Alternatively, as shown in fig. 2 and 3, a third through groove 24 is opened on the circumferential surface of the mounting portion 21 of the sealing ring 2 opposite to the crankshaft 6, and the O-ring is disposed inside the third through groove 24. In order to better illustrate the location of the third through groove 24, the O-rings located at the upper portion of fig. 2 and located inside the third through groove 24 in fig. 3 are omitted, and are explained herein.

Preferably, as shown in fig. 2 and 3, a sunk groove 23 extending along the axis is formed in the end surface of the sealing ring 2 located on the inner side of the crankcase, a counter bore 61 is formed in the circumferential surface of the crankshaft 6, and the sunk groove 23 is communicated with the counter bore 61. By arranging the positioning pin 5 between the sealing ring 2 and the crankshaft 6, on one hand, when the crankshaft 6 rotates, the positioning pin 5 drives the sealing ring 2 to rotate, so that the transmission pressure of the O-shaped ring can be relieved, and the abrasion of the O-shaped ring is reduced; on the other hand, when installing sealing ring 2 on bent axle 6, only need along bent axle 6 the axial promote sealing ring 2 after target in place can, need not to fix again, compare traditional mode that uses the thread tightening, convenient and fast more.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A crankcase sealing device, in which a crankshaft (6) is arranged in a crankcase, characterized in that the crankcase sealing device comprises:

the fixed ring (1) is connected with the crankcase, and the end part of the crankshaft (6) penetrates into the fixed ring (1);

the sealing ring (2) is fixedly connected with the crankshaft (6) and at least partially positioned between the peripheral surface of the crankshaft (6) and the fixed ring (1), and a gap is reserved between the sealing ring (2) and the fixed ring (1);

and the oil blocking fan (3) is connected with the crankshaft (6), and the oil blocking fan (3) can rotate along with the crankshaft (6) so as to enable the oil mist to move towards the side far away from the sealing ring (2).

2. The crankcase sealing arrangement according to claim 1, wherein the sealing ring (2) comprises a mounting portion (21) and a blocking portion (22), the mounting portion (21) and the blocking portion (22) intersecting and being arranged at an included angle;

the fixing ring (1) comprises a mounting hole (11) for the end portion of the crankshaft (6) to penetrate and an inner end face (12) located inside the crankcase, the circumferential face of the mounting hole (11) and the mounting portion (21) are arranged oppositely, and the blocking portion (22) and the inner end face (12) are arranged oppositely.

3. The crankcase sealing arrangement according to claim 2, wherein the angle between the mounting portion (21) and the blocking portion (22) is in the range of 30 ° to 60 °.

4. The crankcase sealing device according to claim 2, wherein a plurality of first through grooves (14) extending in the circumferential direction are formed in the circumferential surface of the mounting hole (11), the plurality of first through grooves (14) are arranged at intervals in the axial direction of the crankshaft (6), a plurality of second through grooves (211) are formed in the mounting portion (21), and each first through groove (14) is correspondingly arranged opposite to one second through groove (211).

5. The crankcase sealing device according to claim 4, wherein the lower end of the fixed ring (1) is provided with a plurality of return pipes (13) penetrating through the fixed ring (1) in the radial direction, and each return pipe (13) is correspondingly communicated with one first through groove (14).

6. Crankcase sealing arrangement according to any of claims 1-5, wherein the oil deflector fan (3) is mounted on the sealing ring (2).

7. The crankcase sealing device according to claim 6, wherein the oil blocking fan (3) includes a main body portion (31) and a plurality of fan blades (32) arranged along a circumferential direction of the crankshaft (6), the main body portion (31) is a revolving body sleeved on the crankshaft (6), a generatrix of the revolving body and an axis of the crankshaft (6) are arranged at an included angle, and the fan blades (32) are formed by bending from the main body portion (31) toward a side away from the sealing ring (2).

8. Crankcase sealing arrangement according to any of claims 1-5, wherein the sealing ring (2) is made of grey cast iron material.

9. The crankcase sealing device according to claim 8, wherein the sealing ring (2) is sleeved on the crankshaft (6) and provided with a gap, a flexible member (4) is arranged between the sealing ring (2) and the circumferential surface of the crankshaft (6), and the flexible member (4) seals the sealing ring (2) and the circumferential surface of the crankshaft (6).

10. The crankcase sealing device according to any one of claims 1-5, wherein a counter bore (61) is formed in the circumferential surface of the crankshaft (6), a counter groove (23) extending along the axis is formed in the end surface, located on the inner side of the crankcase, of the sealing ring (2), and the counter bore (61) is communicated with the counter groove (23);

the crankcase sealing device further comprises a positioning pin (5), and the positioning pin (5) is inserted in the counter bore (61) and extends into the counter bore (23).

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