CN211117576U

CN211117576U - Oil seal and engine assembly

Info

Publication number: CN211117576U
Application number: CN201921642205.4U
Authority: CN
Inventors: 王斌; 陆健; 封慧
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2019-09-29
Filing date: 2019-09-29
Publication date: 2020-07-28
Anticipated expiration: 2029-09-29

Abstract

The utility model relates to the field of sealing technology, specifically disclose an oil blanket and engine assembly, the oil blanket is used for waiting first connecting piece and second to wait the connecting piece to carry out radial seal, this oil blanket includes the oil blanket body, the oil blanket body is the annular and is made by the rubber material, the oil blanket body includes sealing part and the regulating part that connects gradually from inside to outside along the radial direction of oil blanket body, the regulating part is the corrugate, and the regulating part includes at least one crest and at least one trough; the inner surface of the sealing part is a sealing surface which is used for being attached to the outer peripheral surface of the first part to be connected. Compared with the prior art, the adjusting portion is arranged in a corrugated shape, so that the adjusting portion has better following performance, particularly, when the first to-be-connected piece and the second to-be-connected piece are eccentric, the sealing portion can better compensate assembly tolerance caused by eccentricity, and the sealing performance of the first to-be-connected piece and the second to-be-connected piece is guaranteed. The engine assembly comprises the oil seal.

Description

Oil seal and engine assembly

Technical Field

The utility model relates to a sealed technical field especially relates to an oil blanket and engine assembly.

Background

On the diesel engine, the sprayer need pass the cylinder head cover, for preventing the machine oil in the cylinder head cover from leaking, the design oil blanket seals, but need the comprehensive consideration cover and cover the sprayer hole position degree, cover the tolerance that the sprayer hole position degree and assembly caused. Therefore, the oil seal needs good following performance, and meanwhile, the tight fit between the sealing part and the oil injector is ensured, and the sealing is ensured.

The structure of the oil seal in the related art is shown in fig. 1, and comprises a first sealing part 1-1 and a second sealing part 1-2 which are arranged in sequence from outside to inside and a connecting part 1-3 connecting the first sealing part 1-1 and the second sealing part 1-2, wherein the first sealing part 1-1, the connecting part 1-3 and the second sealing part 1-2 form a U-shaped cavity, the first sealing part 1-1 is used for sealing and connecting an injector hole on a cylinder head cover, an injector is arranged in the second sealing part 1-2, a lip 1-4 inclined towards the center of the oil seal is arranged at the bottom of the second sealing part 1-2, the inner side of the lip 1-4 is tightly attached to the injector and forms a sealing strip 1-5, and the lip 1-4 has a certain length, so that the following performance is achieved, and the tolerance compensation effect can be achieved, but only by the length of the lip 1-4 to realize following and make up for tolerance, the compensation of the lip 1-4 is limited, and the problem of separation of the sealing tape 1-5 is easily caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: the utility model provides an oil blanket to solve the oil blanket among the correlation technique and realize following, compensate the tolerance through the length of lip, the compensation performance that leads to is limited, causes the problem of sealing tape separation easily.

In one aspect, the utility model provides an oil blanket for treat connecting piece and second to the first connecting piece of treating and carry out radial seal, this oil blanket includes:

the oil seal comprises an oil seal body, wherein the oil seal body is annular and made of rubber materials, the oil seal body comprises a sealing part and an adjusting part which are sequentially connected from inside to outside along the radial direction of the oil seal body, the adjusting part is corrugated and comprises at least one wave crest and at least one wave trough along the radial direction of the oil seal body; the inner surface of the sealing part is a sealing surface which is used for being attached to the outer peripheral surface of the first part to be connected.

Preferably, the sealing surface is a conical surface, and the inner diameter of the sealing surface gradually decreases from bottom to top along the axial direction of the oil seal body.

Preferably, the oil blanket still includes the air lip, the protruding locate of air lip the bottom of sealing part, and follow the axis direction of oil blanket body, the internal diameter of air lip diminishes from top to bottom gradually.

Preferably, the oil seal further comprises a locking ring, the locking ring and the oil seal body are arranged coaxially, and the locking ring is used for pressing the sealing part to the first to-be-connected piece.

Preferably, the locking ring is sleeved on the sealing part, a limiting boss is arranged on the outer peripheral surface of the sealing part, the outer diameter of the limiting boss is larger than that of the locking ring, and the locking ring is located between the limiting boss and the joint of the adjusting part and the sealing part.

Preferably, the oil seal further comprises a framework, the framework is sleeved on the oil seal body and is in sealing connection with the outer peripheral surface of the adjusting portion, and the framework is installed in the second mounting hole in the connecting piece to be connected in an interference mode.

Preferably, the framework and the oil seal body are integrally formed through a vulcanization process.

Preferably, the peaks and the troughs are both V-shaped.

Preferably, the regulating portion includes a peak and a valley, and the peak is located outside the valley in a radial direction of the oil seal body.

On the other hand, the utility model provides an engine assembly, the oil blanket in any one of the above-mentioned schemes, engine assembly still includes that first treating connecting piece and second treat the connecting piece, first treating the connecting piece is the sprayer, the second is treated the connecting piece and is the cylinder head cover, be equipped with the mounting hole on the cylinder head cover, the sprayer is worn to locate the mounting hole.

The utility model has the advantages that:

the utility model provides an oil blanket and engine assembly, the oil blanket is used for radially sealing to first waiting connecting piece and second waiting connecting piece, this oil blanket includes the oil blanket body, the oil blanket body is the annular and is made by the rubber material, the oil blanket body includes sealing part and the regulating part that connects gradually from inside to outside along the radial direction of oil blanket body, the regulating part is the corrugate, and the regulating part includes at least one crest and at least one trough; the inner surface of the sealing part is a sealing surface which is used for being attached to the outer peripheral surface of the first part to be connected. Compared with the prior art, the adjusting portion is arranged in a corrugated shape, so that the adjusting portion has better following performance, particularly, when the first to-be-connected piece and the second to-be-connected piece are eccentric, the sealing portion can better compensate assembly tolerance caused by eccentricity, and the sealing performance of the first to-be-connected piece and the second to-be-connected piece is guaranteed.

Drawings

Fig. 1 is a schematic structural view of an oil seal in the related art of the present invention;

fig. 2 is a schematic structural diagram of an oil seal in an embodiment of the present invention.

In the figure:

1-1, a first sealing part; 1-2, a second sealing part; 1-3, a connecting part; 1-4, lip; 1-5, sealing tape;

1. an oil seal body; 11. a sealing part; 111. a sealing surface; 12. an adjustment section;

2. a framework;

3. a gas lip;

4. and a locking ring.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, 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," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means 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 invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 2, the present embodiment provides an engine assembly, which includes an oil seal, a first to-be-connected component and a second to-be-connected component, where the first to-be-connected component is an oil injector, the second to-be-connected component is a cylinder head cover, a mounting hole is formed in the cylinder head cover, the oil injector is inserted into the mounting hole, and the oil seal is also disposed in the mounting hole and is used for sealing the cylinder head cover and the oil injector.

Specifically, the oil seal comprises an oil seal body 1, the oil seal body 1 is annular and made of rubber materials, the oil seal body 1 comprises a sealing part 11 and an adjusting part 12 which are sequentially connected from inside to outside along the radial direction of the oil seal body 1, the adjusting part 12 is corrugated, and the adjusting part 12 comprises at least one wave crest and at least one wave trough along the radial direction of the oil seal body; the inner surface of the seal portion 11 is a seal surface 111, and the seal surface 111 is for adhering to the outer peripheral surface of the injector. Compared with the related art, the adjusting part 12 is arranged in a corrugated shape, so that the oil sprayer has better following performance, particularly when the oil sprayer is eccentric relative to the mounting hole in the cylinder head cover, the assembly tolerance caused by eccentricity can be better compensated, and the sealing performance of the cylinder head cover and the mounting hole is ensured.

Optionally, the oil seal further comprises a framework 2, the framework 2 is sleeved on the oil seal body 1 and is in sealing connection with the outer peripheral surface of the adjusting portion 12, and the framework 2 is installed in the installation hole in the cylinder head cover in an interference manner. Through skeleton 2 and cylinder head cover interference fit, can guarantee the position stability of oil blanket and cylinder head cover. In other embodiments, the oil seal body 1 can be directly matched with the shell of the cylinder head cover in a sealing way.

In order to ensure the connection strength between the framework 2 and the oil seal body 1, in this embodiment, the framework 2 and the oil seal body 1 are integrally formed through a vulcanization process. Preferably, the inner peripheral surface of the framework 2 is uniformly provided with grooves, so that the connection strength between the framework 2 and the oil seal body 1 can be further ensured during molding. Alternatively, a rib may be provided on the frame 2 and embedded in the adjustment portion 12, so that the connection strength between the frame 2 and the oil seal body 1 can be similarly enhanced.

Alternatively, the sealing surface 111 is a conical surface, and the inner diameter of the sealing surface 111 gradually decreases from bottom to top along the axial direction of the oil seal body 1. With such an arrangement, the sealing surface 111 can be ensured to be attached to the outer surface of the fuel injector.

Optionally, the oil seal still includes air lip 3, and air lip 3 protruding is located the bottom of sealing 11, and along the axis direction of oil seal body 1, and the internal diameter of air lip 3 diminishes from top to bottom gradually. When the air pressure in the cylinder head cover is suddenly increased, the outer side of the air lip 3 is pushed by the air pressure, the inner surface of the air lip 3 can be abutted against the outer peripheral surface of the oil injector, and the auxiliary sealing function is achieved. And the inner diameter of the air lip 3 is gradually reduced from top to bottom, so that the sealing effect of the air lip 3 and the oil sprayer can be ensured. Preferably, the radial thickness of the air lip 3 is equal everywhere in this embodiment.

Optionally, the oil seal further comprises a locking ring 4, the locking ring 4 is arranged coaxially with the oil seal body 1, and the locking ring 4 is used for pressing the sealing part 11 to the oil injector. By providing the lock ring 4, the seal portion 11 can be prevented from being separated from the injector. Preferably, the sealing portion 11 is located to the lock ring 4 cover, is equipped with spacing boss on the outer peripheral face of sealing portion 11, and the external diameter of spacing boss is greater than the external diameter of lock ring 4, and the lock ring 4 is located between spacing boss and the junction of regulating part 12 and sealing portion 11. So set up, the spacing boss of accessible and regulating part 12 carry out axial spacing to locking ring 4, can prevent that locking ring 4 from breaking away from on sealing 11. In other embodiments, the locking ring 4 may be embedded in the sealing portion 11, or a groove may be formed in the outer surface of the sealing portion 11, and the locking ring 4 is disposed in the groove, so that the axial limitation of the locking ring 4 may be achieved. Further preferably, the locking ring 4 is made of steel material and has high strength.

Optionally, the peaks and valleys are V-shaped for ease of compression. In other embodiments, the peaks and valleys may also be provided in a U-shape. In this embodiment, the regulating portion 12 includes a wave crest and a wave trough, and the wave crest is located outside the wave trough in the radial direction of the oil seal body 1. It is understood that the specific number of the peaks and the troughs in this embodiment is not limited, and in other embodiments, the number of the peaks and the troughs may be set according to actual needs.

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. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. 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

1. An oil blanket for treating the connecting piece to first treat the connecting piece and the second carries out radial seal, its characterized in that, the oil blanket includes:

the oil seal comprises an oil seal body (1), wherein the oil seal body (1) is annular and made of rubber materials, the oil seal body (1) comprises a sealing part (11) and an adjusting part (12) which are sequentially connected from inside to outside along the radial direction of the oil seal body (1), the adjusting part (12) is corrugated and along the radial direction of the oil seal body (1), and the adjusting part (12) comprises at least one wave crest and at least one wave trough; the inner surface of the sealing part (11) is a sealing surface (111), and the sealing surface (111) is used for being attached to the outer peripheral surface of the first part to be connected.

2. An oil seal according to claim 1, characterized in that the sealing surface (111) is a conical surface, and the inner diameter of the sealing surface (111) is gradually reduced from bottom to top along the axial direction of the oil seal body (1).

3. The oil seal according to claim 1, further comprising an air lip (3), wherein the air lip (3) is arranged at the bottom end of the sealing part (11) in a protruding manner, and along the axial direction of the oil seal body (1), the inner diameter of the air lip (3) is gradually reduced from top to bottom.

4. The oil seal according to claim 1, further comprising a locking ring (4), wherein the locking ring (4) is arranged coaxially with the oil seal body (1), and the locking ring (4) is used for pressing the sealing part (11) against the first to-be-connected component.

5. The oil seal according to claim 4, characterized in that the sealing part (11) is sleeved with the locking ring (4), a limiting boss is arranged on the outer peripheral surface of the sealing part (11), the outer diameter of the limiting boss is larger than that of the locking ring (4), and the locking ring (4) is positioned between the limiting boss and the joint of the adjusting part (12) and the sealing part (11).

6. The oil seal according to claim 1, further comprising a framework (2), wherein the framework (2) is sleeved on the oil seal body (1) and is in sealing connection with the outer peripheral surface of the adjusting part (12), and the framework (2) is installed in the installation hole of the second to-be-connected component in an interference manner.

7. An oil seal according to claim 6, wherein the skeleton (2) and the oil seal body (1) are integrally formed by a vulcanization process.

8. An oil seal as defined in claim 1, wherein said peaks and said troughs are each V-shaped.

9. An oil seal according to claim 1, wherein said regulating portion (12) comprises a crest and a trough, said crest being located outside said trough in a radial direction of said oil seal body (1).

10. An engine assembly, characterized by, include the oil blanket of any one of claims 1-9, the engine assembly still includes the first and second and treats the connecting piece, the first treats the connecting piece as the sprayer, the second treats the connecting piece as the cylinder head cover, be equipped with the mounting hole on the cylinder head cover, the sprayer wear to locate the mounting hole.